| 1 | /* util.c |
| 2 | * |
| 3 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others |
| 5 | * |
| 6 | * You may distribute under the terms of either the GNU General Public |
| 7 | * License or the Artistic License, as specified in the README file. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * "Very useful, no doubt, that was to Saruman; yet it seems that he was |
| 13 | * not content." --Gandalf |
| 14 | */ |
| 15 | |
| 16 | /* This file contains assorted utility routines. |
| 17 | * Which is a polite way of saying any stuff that people couldn't think of |
| 18 | * a better place for. Amongst other things, it includes the warning and |
| 19 | * dieing stuff, plus wrappers for malloc code. |
| 20 | */ |
| 21 | |
| 22 | #include "EXTERN.h" |
| 23 | #define PERL_IN_UTIL_C |
| 24 | #include "perl.h" |
| 25 | |
| 26 | #ifndef PERL_MICRO |
| 27 | #include <signal.h> |
| 28 | #ifndef SIG_ERR |
| 29 | # define SIG_ERR ((Sighandler_t) -1) |
| 30 | #endif |
| 31 | #endif |
| 32 | |
| 33 | #ifdef __Lynx__ |
| 34 | /* Missing protos on LynxOS */ |
| 35 | int putenv(char *); |
| 36 | #endif |
| 37 | |
| 38 | #ifdef I_SYS_WAIT |
| 39 | # include <sys/wait.h> |
| 40 | #endif |
| 41 | |
| 42 | #ifdef HAS_SELECT |
| 43 | # ifdef I_SYS_SELECT |
| 44 | # include <sys/select.h> |
| 45 | # endif |
| 46 | #endif |
| 47 | |
| 48 | #define FLUSH |
| 49 | |
| 50 | #if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC) |
| 51 | # define FD_CLOEXEC 1 /* NeXT needs this */ |
| 52 | #endif |
| 53 | |
| 54 | /* NOTE: Do not call the next three routines directly. Use the macros |
| 55 | * in handy.h, so that we can easily redefine everything to do tracking of |
| 56 | * allocated hunks back to the original New to track down any memory leaks. |
| 57 | * XXX This advice seems to be widely ignored :-( --AD August 1996. |
| 58 | */ |
| 59 | |
| 60 | static char * |
| 61 | S_write_no_mem(pTHX) |
| 62 | { |
| 63 | /* Can't use PerlIO to write as it allocates memory */ |
| 64 | PerlLIO_write(PerlIO_fileno(Perl_error_log), |
| 65 | PL_no_mem, strlen(PL_no_mem)); |
| 66 | my_exit(1); |
| 67 | return Nullch; |
| 68 | } |
| 69 | |
| 70 | /* paranoid version of system's malloc() */ |
| 71 | |
| 72 | Malloc_t |
| 73 | Perl_safesysmalloc(MEM_SIZE size) |
| 74 | { |
| 75 | dTHX; |
| 76 | Malloc_t ptr; |
| 77 | #ifdef HAS_64K_LIMIT |
| 78 | if (size > 0xffff) { |
| 79 | PerlIO_printf(Perl_error_log, |
| 80 | "Allocation too large: %lx\n", size) FLUSH; |
| 81 | my_exit(1); |
| 82 | } |
| 83 | #endif /* HAS_64K_LIMIT */ |
| 84 | #ifdef DEBUGGING |
| 85 | if ((long)size < 0) |
| 86 | Perl_croak_nocontext("panic: malloc"); |
| 87 | #endif |
| 88 | ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */ |
| 89 | PERL_ALLOC_CHECK(ptr); |
| 90 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); |
| 91 | if (ptr != Nullch) |
| 92 | return ptr; |
| 93 | else if (PL_nomemok) |
| 94 | return Nullch; |
| 95 | else { |
| 96 | return S_write_no_mem(aTHX); |
| 97 | } |
| 98 | /*NOTREACHED*/ |
| 99 | } |
| 100 | |
| 101 | /* paranoid version of system's realloc() */ |
| 102 | |
| 103 | Malloc_t |
| 104 | Perl_safesysrealloc(Malloc_t where,MEM_SIZE size) |
| 105 | { |
| 106 | dTHX; |
| 107 | Malloc_t ptr; |
| 108 | #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO) |
| 109 | Malloc_t PerlMem_realloc(); |
| 110 | #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */ |
| 111 | |
| 112 | #ifdef HAS_64K_LIMIT |
| 113 | if (size > 0xffff) { |
| 114 | PerlIO_printf(Perl_error_log, |
| 115 | "Reallocation too large: %lx\n", size) FLUSH; |
| 116 | my_exit(1); |
| 117 | } |
| 118 | #endif /* HAS_64K_LIMIT */ |
| 119 | if (!size) { |
| 120 | safesysfree(where); |
| 121 | return NULL; |
| 122 | } |
| 123 | |
| 124 | if (!where) |
| 125 | return safesysmalloc(size); |
| 126 | #ifdef DEBUGGING |
| 127 | if ((long)size < 0) |
| 128 | Perl_croak_nocontext("panic: realloc"); |
| 129 | #endif |
| 130 | ptr = (Malloc_t)PerlMem_realloc(where,size); |
| 131 | PERL_ALLOC_CHECK(ptr); |
| 132 | |
| 133 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++)); |
| 134 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); |
| 135 | |
| 136 | if (ptr != Nullch) |
| 137 | return ptr; |
| 138 | else if (PL_nomemok) |
| 139 | return Nullch; |
| 140 | else { |
| 141 | return S_write_no_mem(aTHX); |
| 142 | } |
| 143 | /*NOTREACHED*/ |
| 144 | } |
| 145 | |
| 146 | /* safe version of system's free() */ |
| 147 | |
| 148 | Free_t |
| 149 | Perl_safesysfree(Malloc_t where) |
| 150 | { |
| 151 | dVAR; |
| 152 | #ifdef PERL_IMPLICIT_SYS |
| 153 | dTHX; |
| 154 | #endif |
| 155 | DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++)); |
| 156 | if (where) { |
| 157 | PerlMem_free(where); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /* safe version of system's calloc() */ |
| 162 | |
| 163 | Malloc_t |
| 164 | Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size) |
| 165 | { |
| 166 | dTHX; |
| 167 | Malloc_t ptr; |
| 168 | |
| 169 | #ifdef HAS_64K_LIMIT |
| 170 | if (size * count > 0xffff) { |
| 171 | PerlIO_printf(Perl_error_log, |
| 172 | "Allocation too large: %lx\n", size * count) FLUSH; |
| 173 | my_exit(1); |
| 174 | } |
| 175 | #endif /* HAS_64K_LIMIT */ |
| 176 | #ifdef DEBUGGING |
| 177 | if ((long)size < 0 || (long)count < 0) |
| 178 | Perl_croak_nocontext("panic: calloc"); |
| 179 | #endif |
| 180 | size *= count; |
| 181 | ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */ |
| 182 | PERL_ALLOC_CHECK(ptr); |
| 183 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size)); |
| 184 | if (ptr != Nullch) { |
| 185 | memset((void*)ptr, 0, size); |
| 186 | return ptr; |
| 187 | } |
| 188 | else if (PL_nomemok) |
| 189 | return Nullch; |
| 190 | else { |
| 191 | return S_write_no_mem(aTHX); |
| 192 | } |
| 193 | /*NOTREACHED*/ |
| 194 | } |
| 195 | |
| 196 | /* These must be defined when not using Perl's malloc for binary |
| 197 | * compatibility */ |
| 198 | |
| 199 | #ifndef MYMALLOC |
| 200 | |
| 201 | Malloc_t Perl_malloc (MEM_SIZE nbytes) |
| 202 | { |
| 203 | dTHXs; |
| 204 | return (Malloc_t)PerlMem_malloc(nbytes); |
| 205 | } |
| 206 | |
| 207 | Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size) |
| 208 | { |
| 209 | dTHXs; |
| 210 | return (Malloc_t)PerlMem_calloc(elements, size); |
| 211 | } |
| 212 | |
| 213 | Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes) |
| 214 | { |
| 215 | dTHXs; |
| 216 | return (Malloc_t)PerlMem_realloc(where, nbytes); |
| 217 | } |
| 218 | |
| 219 | Free_t Perl_mfree (Malloc_t where) |
| 220 | { |
| 221 | dTHXs; |
| 222 | PerlMem_free(where); |
| 223 | } |
| 224 | |
| 225 | #endif |
| 226 | |
| 227 | /* copy a string up to some (non-backslashed) delimiter, if any */ |
| 228 | |
| 229 | char * |
| 230 | Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen) |
| 231 | { |
| 232 | register I32 tolen; |
| 233 | for (tolen = 0; from < fromend; from++, tolen++) { |
| 234 | if (*from == '\\') { |
| 235 | if (from[1] == delim) |
| 236 | from++; |
| 237 | else { |
| 238 | if (to < toend) |
| 239 | *to++ = *from; |
| 240 | tolen++; |
| 241 | from++; |
| 242 | } |
| 243 | } |
| 244 | else if (*from == delim) |
| 245 | break; |
| 246 | if (to < toend) |
| 247 | *to++ = *from; |
| 248 | } |
| 249 | if (to < toend) |
| 250 | *to = '\0'; |
| 251 | *retlen = tolen; |
| 252 | return (char *)from; |
| 253 | } |
| 254 | |
| 255 | /* return ptr to little string in big string, NULL if not found */ |
| 256 | /* This routine was donated by Corey Satten. */ |
| 257 | |
| 258 | char * |
| 259 | Perl_instr(pTHX_ register const char *big, register const char *little) |
| 260 | { |
| 261 | register I32 first; |
| 262 | |
| 263 | if (!little) |
| 264 | return (char*)big; |
| 265 | first = *little++; |
| 266 | if (!first) |
| 267 | return (char*)big; |
| 268 | while (*big) { |
| 269 | register const char *s, *x; |
| 270 | if (*big++ != first) |
| 271 | continue; |
| 272 | for (x=big,s=little; *s; /**/ ) { |
| 273 | if (!*x) |
| 274 | return Nullch; |
| 275 | if (*s++ != *x++) { |
| 276 | s--; |
| 277 | break; |
| 278 | } |
| 279 | } |
| 280 | if (!*s) |
| 281 | return (char*)(big-1); |
| 282 | } |
| 283 | return Nullch; |
| 284 | } |
| 285 | |
| 286 | /* same as instr but allow embedded nulls */ |
| 287 | |
| 288 | char * |
| 289 | Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend) |
| 290 | { |
| 291 | register const I32 first = *little; |
| 292 | register const char * const littleend = lend; |
| 293 | |
| 294 | if (!first && little >= littleend) |
| 295 | return (char*)big; |
| 296 | if (bigend - big < littleend - little) |
| 297 | return Nullch; |
| 298 | bigend -= littleend - little++; |
| 299 | while (big <= bigend) { |
| 300 | register const char *s, *x; |
| 301 | if (*big++ != first) |
| 302 | continue; |
| 303 | for (x=big,s=little; s < littleend; /**/ ) { |
| 304 | if (*s++ != *x++) { |
| 305 | s--; |
| 306 | break; |
| 307 | } |
| 308 | } |
| 309 | if (s >= littleend) |
| 310 | return (char*)(big-1); |
| 311 | } |
| 312 | return Nullch; |
| 313 | } |
| 314 | |
| 315 | /* reverse of the above--find last substring */ |
| 316 | |
| 317 | char * |
| 318 | Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend) |
| 319 | { |
| 320 | register const char *bigbeg; |
| 321 | register const I32 first = *little; |
| 322 | register const char * const littleend = lend; |
| 323 | |
| 324 | if (!first && little >= littleend) |
| 325 | return (char*)bigend; |
| 326 | bigbeg = big; |
| 327 | big = bigend - (littleend - little++); |
| 328 | while (big >= bigbeg) { |
| 329 | register const char *s, *x; |
| 330 | if (*big-- != first) |
| 331 | continue; |
| 332 | for (x=big+2,s=little; s < littleend; /**/ ) { |
| 333 | if (*s++ != *x++) { |
| 334 | s--; |
| 335 | break; |
| 336 | } |
| 337 | } |
| 338 | if (s >= littleend) |
| 339 | return (char*)(big+1); |
| 340 | } |
| 341 | return Nullch; |
| 342 | } |
| 343 | |
| 344 | #define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/ |
| 345 | |
| 346 | /* As a space optimization, we do not compile tables for strings of length |
| 347 | 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are |
| 348 | special-cased in fbm_instr(). |
| 349 | |
| 350 | If FBMcf_TAIL, the table is created as if the string has a trailing \n. */ |
| 351 | |
| 352 | /* |
| 353 | =head1 Miscellaneous Functions |
| 354 | |
| 355 | =for apidoc fbm_compile |
| 356 | |
| 357 | Analyses the string in order to make fast searches on it using fbm_instr() |
| 358 | -- the Boyer-Moore algorithm. |
| 359 | |
| 360 | =cut |
| 361 | */ |
| 362 | |
| 363 | void |
| 364 | Perl_fbm_compile(pTHX_ SV *sv, U32 flags) |
| 365 | { |
| 366 | register const U8 *s; |
| 367 | register U32 i; |
| 368 | STRLEN len; |
| 369 | I32 rarest = 0; |
| 370 | U32 frequency = 256; |
| 371 | |
| 372 | if (flags & FBMcf_TAIL) { |
| 373 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL; |
| 374 | sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */ |
| 375 | if (mg && mg->mg_len >= 0) |
| 376 | mg->mg_len++; |
| 377 | } |
| 378 | s = (U8*)SvPV_force_mutable(sv, len); |
| 379 | SvUPGRADE(sv, SVt_PVBM); |
| 380 | if (len == 0) /* TAIL might be on a zero-length string. */ |
| 381 | return; |
| 382 | if (len > 2) { |
| 383 | const unsigned char *sb; |
| 384 | const U8 mlen = (len>255) ? 255 : (U8)len; |
| 385 | register U8 *table; |
| 386 | |
| 387 | Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET); |
| 388 | table = (unsigned char*)(SvPVX_mutable(sv) + len + FBM_TABLE_OFFSET); |
| 389 | s = table - 1 - FBM_TABLE_OFFSET; /* last char */ |
| 390 | memset((void*)table, mlen, 256); |
| 391 | table[-1] = (U8)flags; |
| 392 | i = 0; |
| 393 | sb = s - mlen + 1; /* first char (maybe) */ |
| 394 | while (s >= sb) { |
| 395 | if (table[*s] == mlen) |
| 396 | table[*s] = (U8)i; |
| 397 | s--, i++; |
| 398 | } |
| 399 | } |
| 400 | sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */ |
| 401 | SvVALID_on(sv); |
| 402 | |
| 403 | s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */ |
| 404 | for (i = 0; i < len; i++) { |
| 405 | if (PL_freq[s[i]] < frequency) { |
| 406 | rarest = i; |
| 407 | frequency = PL_freq[s[i]]; |
| 408 | } |
| 409 | } |
| 410 | BmRARE(sv) = s[rarest]; |
| 411 | BmPREVIOUS(sv) = (U16)rarest; |
| 412 | BmUSEFUL(sv) = 100; /* Initial value */ |
| 413 | if (flags & FBMcf_TAIL) |
| 414 | SvTAIL_on(sv); |
| 415 | DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n", |
| 416 | BmRARE(sv),BmPREVIOUS(sv))); |
| 417 | } |
| 418 | |
| 419 | /* If SvTAIL(littlestr), it has a fake '\n' at end. */ |
| 420 | /* If SvTAIL is actually due to \Z or \z, this gives false positives |
| 421 | if multiline */ |
| 422 | |
| 423 | /* |
| 424 | =for apidoc fbm_instr |
| 425 | |
| 426 | Returns the location of the SV in the string delimited by C<str> and |
| 427 | C<strend>. It returns C<Nullch> if the string can't be found. The C<sv> |
| 428 | does not have to be fbm_compiled, but the search will not be as fast |
| 429 | then. |
| 430 | |
| 431 | =cut |
| 432 | */ |
| 433 | |
| 434 | char * |
| 435 | Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags) |
| 436 | { |
| 437 | register unsigned char *s; |
| 438 | STRLEN l; |
| 439 | register const unsigned char *little |
| 440 | = (const unsigned char *)SvPV_const(littlestr,l); |
| 441 | register STRLEN littlelen = l; |
| 442 | register const I32 multiline = flags & FBMrf_MULTILINE; |
| 443 | |
| 444 | if ((STRLEN)(bigend - big) < littlelen) { |
| 445 | if ( SvTAIL(littlestr) |
| 446 | && ((STRLEN)(bigend - big) == littlelen - 1) |
| 447 | && (littlelen == 1 |
| 448 | || (*big == *little && |
| 449 | memEQ((char *)big, (char *)little, littlelen - 1)))) |
| 450 | return (char*)big; |
| 451 | return Nullch; |
| 452 | } |
| 453 | |
| 454 | if (littlelen <= 2) { /* Special-cased */ |
| 455 | |
| 456 | if (littlelen == 1) { |
| 457 | if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */ |
| 458 | /* Know that bigend != big. */ |
| 459 | if (bigend[-1] == '\n') |
| 460 | return (char *)(bigend - 1); |
| 461 | return (char *) bigend; |
| 462 | } |
| 463 | s = big; |
| 464 | while (s < bigend) { |
| 465 | if (*s == *little) |
| 466 | return (char *)s; |
| 467 | s++; |
| 468 | } |
| 469 | if (SvTAIL(littlestr)) |
| 470 | return (char *) bigend; |
| 471 | return Nullch; |
| 472 | } |
| 473 | if (!littlelen) |
| 474 | return (char*)big; /* Cannot be SvTAIL! */ |
| 475 | |
| 476 | /* littlelen is 2 */ |
| 477 | if (SvTAIL(littlestr) && !multiline) { |
| 478 | if (bigend[-1] == '\n' && bigend[-2] == *little) |
| 479 | return (char*)bigend - 2; |
| 480 | if (bigend[-1] == *little) |
| 481 | return (char*)bigend - 1; |
| 482 | return Nullch; |
| 483 | } |
| 484 | { |
| 485 | /* This should be better than FBM if c1 == c2, and almost |
| 486 | as good otherwise: maybe better since we do less indirection. |
| 487 | And we save a lot of memory by caching no table. */ |
| 488 | const unsigned char c1 = little[0]; |
| 489 | const unsigned char c2 = little[1]; |
| 490 | |
| 491 | s = big + 1; |
| 492 | bigend--; |
| 493 | if (c1 != c2) { |
| 494 | while (s <= bigend) { |
| 495 | if (s[0] == c2) { |
| 496 | if (s[-1] == c1) |
| 497 | return (char*)s - 1; |
| 498 | s += 2; |
| 499 | continue; |
| 500 | } |
| 501 | next_chars: |
| 502 | if (s[0] == c1) { |
| 503 | if (s == bigend) |
| 504 | goto check_1char_anchor; |
| 505 | if (s[1] == c2) |
| 506 | return (char*)s; |
| 507 | else { |
| 508 | s++; |
| 509 | goto next_chars; |
| 510 | } |
| 511 | } |
| 512 | else |
| 513 | s += 2; |
| 514 | } |
| 515 | goto check_1char_anchor; |
| 516 | } |
| 517 | /* Now c1 == c2 */ |
| 518 | while (s <= bigend) { |
| 519 | if (s[0] == c1) { |
| 520 | if (s[-1] == c1) |
| 521 | return (char*)s - 1; |
| 522 | if (s == bigend) |
| 523 | goto check_1char_anchor; |
| 524 | if (s[1] == c1) |
| 525 | return (char*)s; |
| 526 | s += 3; |
| 527 | } |
| 528 | else |
| 529 | s += 2; |
| 530 | } |
| 531 | } |
| 532 | check_1char_anchor: /* One char and anchor! */ |
| 533 | if (SvTAIL(littlestr) && (*bigend == *little)) |
| 534 | return (char *)bigend; /* bigend is already decremented. */ |
| 535 | return Nullch; |
| 536 | } |
| 537 | if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */ |
| 538 | s = bigend - littlelen; |
| 539 | if (s >= big && bigend[-1] == '\n' && *s == *little |
| 540 | /* Automatically of length > 2 */ |
| 541 | && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2)) |
| 542 | { |
| 543 | return (char*)s; /* how sweet it is */ |
| 544 | } |
| 545 | if (s[1] == *little |
| 546 | && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2)) |
| 547 | { |
| 548 | return (char*)s + 1; /* how sweet it is */ |
| 549 | } |
| 550 | return Nullch; |
| 551 | } |
| 552 | if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) { |
| 553 | char * const b = ninstr((char*)big,(char*)bigend, |
| 554 | (char*)little, (char*)little + littlelen); |
| 555 | |
| 556 | if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */ |
| 557 | /* Chop \n from littlestr: */ |
| 558 | s = bigend - littlelen + 1; |
| 559 | if (*s == *little |
| 560 | && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2)) |
| 561 | { |
| 562 | return (char*)s; |
| 563 | } |
| 564 | return Nullch; |
| 565 | } |
| 566 | return b; |
| 567 | } |
| 568 | |
| 569 | { /* Do actual FBM. */ |
| 570 | register const unsigned char * const table = little + littlelen + FBM_TABLE_OFFSET; |
| 571 | register const unsigned char *oldlittle; |
| 572 | |
| 573 | if (littlelen > (STRLEN)(bigend - big)) |
| 574 | return Nullch; |
| 575 | --littlelen; /* Last char found by table lookup */ |
| 576 | |
| 577 | s = big + littlelen; |
| 578 | little += littlelen; /* last char */ |
| 579 | oldlittle = little; |
| 580 | if (s < bigend) { |
| 581 | register I32 tmp; |
| 582 | |
| 583 | top2: |
| 584 | if ((tmp = table[*s])) { |
| 585 | if ((s += tmp) < bigend) |
| 586 | goto top2; |
| 587 | goto check_end; |
| 588 | } |
| 589 | else { /* less expensive than calling strncmp() */ |
| 590 | register unsigned char * const olds = s; |
| 591 | |
| 592 | tmp = littlelen; |
| 593 | |
| 594 | while (tmp--) { |
| 595 | if (*--s == *--little) |
| 596 | continue; |
| 597 | s = olds + 1; /* here we pay the price for failure */ |
| 598 | little = oldlittle; |
| 599 | if (s < bigend) /* fake up continue to outer loop */ |
| 600 | goto top2; |
| 601 | goto check_end; |
| 602 | } |
| 603 | return (char *)s; |
| 604 | } |
| 605 | } |
| 606 | check_end: |
| 607 | if ( s == bigend && (table[-1] & FBMcf_TAIL) |
| 608 | && memEQ((char *)(bigend - littlelen), |
| 609 | (char *)(oldlittle - littlelen), littlelen) ) |
| 610 | return (char*)bigend - littlelen; |
| 611 | return Nullch; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /* start_shift, end_shift are positive quantities which give offsets |
| 616 | of ends of some substring of bigstr. |
| 617 | If "last" we want the last occurrence. |
| 618 | old_posp is the way of communication between consequent calls if |
| 619 | the next call needs to find the . |
| 620 | The initial *old_posp should be -1. |
| 621 | |
| 622 | Note that we take into account SvTAIL, so one can get extra |
| 623 | optimizations if _ALL flag is set. |
| 624 | */ |
| 625 | |
| 626 | /* If SvTAIL is actually due to \Z or \z, this gives false positives |
| 627 | if PL_multiline. In fact if !PL_multiline the authoritative answer |
| 628 | is not supported yet. */ |
| 629 | |
| 630 | char * |
| 631 | Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last) |
| 632 | { |
| 633 | register const unsigned char *big; |
| 634 | register I32 pos; |
| 635 | register I32 previous; |
| 636 | register I32 first; |
| 637 | register const unsigned char *little; |
| 638 | register I32 stop_pos; |
| 639 | register const unsigned char *littleend; |
| 640 | I32 found = 0; |
| 641 | |
| 642 | if (*old_posp == -1 |
| 643 | ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0 |
| 644 | : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) { |
| 645 | cant_find: |
| 646 | if ( BmRARE(littlestr) == '\n' |
| 647 | && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) { |
| 648 | little = (const unsigned char *)(SvPVX_const(littlestr)); |
| 649 | littleend = little + SvCUR(littlestr); |
| 650 | first = *little++; |
| 651 | goto check_tail; |
| 652 | } |
| 653 | return Nullch; |
| 654 | } |
| 655 | |
| 656 | little = (const unsigned char *)(SvPVX_const(littlestr)); |
| 657 | littleend = little + SvCUR(littlestr); |
| 658 | first = *little++; |
| 659 | /* The value of pos we can start at: */ |
| 660 | previous = BmPREVIOUS(littlestr); |
| 661 | big = (const unsigned char *)(SvPVX_const(bigstr)); |
| 662 | /* The value of pos we can stop at: */ |
| 663 | stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous); |
| 664 | if (previous + start_shift > stop_pos) { |
| 665 | /* |
| 666 | stop_pos does not include SvTAIL in the count, so this check is incorrect |
| 667 | (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19 |
| 668 | */ |
| 669 | #if 0 |
| 670 | if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */ |
| 671 | goto check_tail; |
| 672 | #endif |
| 673 | return Nullch; |
| 674 | } |
| 675 | while (pos < previous + start_shift) { |
| 676 | if (!(pos += PL_screamnext[pos])) |
| 677 | goto cant_find; |
| 678 | } |
| 679 | big -= previous; |
| 680 | do { |
| 681 | register const unsigned char *s, *x; |
| 682 | if (pos >= stop_pos) break; |
| 683 | if (big[pos] != first) |
| 684 | continue; |
| 685 | for (x=big+pos+1,s=little; s < littleend; /**/ ) { |
| 686 | if (*s++ != *x++) { |
| 687 | s--; |
| 688 | break; |
| 689 | } |
| 690 | } |
| 691 | if (s == littleend) { |
| 692 | *old_posp = pos; |
| 693 | if (!last) return (char *)(big+pos); |
| 694 | found = 1; |
| 695 | } |
| 696 | } while ( pos += PL_screamnext[pos] ); |
| 697 | if (last && found) |
| 698 | return (char *)(big+(*old_posp)); |
| 699 | check_tail: |
| 700 | if (!SvTAIL(littlestr) || (end_shift > 0)) |
| 701 | return Nullch; |
| 702 | /* Ignore the trailing "\n". This code is not microoptimized */ |
| 703 | big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr)); |
| 704 | stop_pos = littleend - little; /* Actual littlestr len */ |
| 705 | if (stop_pos == 0) |
| 706 | return (char*)big; |
| 707 | big -= stop_pos; |
| 708 | if (*big == first |
| 709 | && ((stop_pos == 1) || |
| 710 | memEQ((char *)(big + 1), (char *)little, stop_pos - 1))) |
| 711 | return (char*)big; |
| 712 | return Nullch; |
| 713 | } |
| 714 | |
| 715 | I32 |
| 716 | Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len) |
| 717 | { |
| 718 | register const U8 *a = (const U8 *)s1; |
| 719 | register const U8 *b = (const U8 *)s2; |
| 720 | while (len--) { |
| 721 | if (*a != *b && *a != PL_fold[*b]) |
| 722 | return 1; |
| 723 | a++,b++; |
| 724 | } |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | I32 |
| 729 | Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len) |
| 730 | { |
| 731 | dVAR; |
| 732 | register const U8 *a = (const U8 *)s1; |
| 733 | register const U8 *b = (const U8 *)s2; |
| 734 | while (len--) { |
| 735 | if (*a != *b && *a != PL_fold_locale[*b]) |
| 736 | return 1; |
| 737 | a++,b++; |
| 738 | } |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | /* copy a string to a safe spot */ |
| 743 | |
| 744 | /* |
| 745 | =head1 Memory Management |
| 746 | |
| 747 | =for apidoc savepv |
| 748 | |
| 749 | Perl's version of C<strdup()>. Returns a pointer to a newly allocated |
| 750 | string which is a duplicate of C<pv>. The size of the string is |
| 751 | determined by C<strlen()>. The memory allocated for the new string can |
| 752 | be freed with the C<Safefree()> function. |
| 753 | |
| 754 | =cut |
| 755 | */ |
| 756 | |
| 757 | char * |
| 758 | Perl_savepv(pTHX_ const char *pv) |
| 759 | { |
| 760 | if (!pv) |
| 761 | return Nullch; |
| 762 | else { |
| 763 | char *newaddr; |
| 764 | const STRLEN pvlen = strlen(pv)+1; |
| 765 | Newx(newaddr,pvlen,char); |
| 766 | return memcpy(newaddr,pv,pvlen); |
| 767 | } |
| 768 | |
| 769 | } |
| 770 | |
| 771 | /* same thing but with a known length */ |
| 772 | |
| 773 | /* |
| 774 | =for apidoc savepvn |
| 775 | |
| 776 | Perl's version of what C<strndup()> would be if it existed. Returns a |
| 777 | pointer to a newly allocated string which is a duplicate of the first |
| 778 | C<len> bytes from C<pv>. The memory allocated for the new string can be |
| 779 | freed with the C<Safefree()> function. |
| 780 | |
| 781 | =cut |
| 782 | */ |
| 783 | |
| 784 | char * |
| 785 | Perl_savepvn(pTHX_ const char *pv, register I32 len) |
| 786 | { |
| 787 | register char *newaddr; |
| 788 | |
| 789 | Newx(newaddr,len+1,char); |
| 790 | /* Give a meaning to NULL pointer mainly for the use in sv_magic() */ |
| 791 | if (pv) { |
| 792 | /* might not be null terminated */ |
| 793 | newaddr[len] = '\0'; |
| 794 | return (char *) CopyD(pv,newaddr,len,char); |
| 795 | } |
| 796 | else { |
| 797 | return (char *) ZeroD(newaddr,len+1,char); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | /* |
| 802 | =for apidoc savesharedpv |
| 803 | |
| 804 | A version of C<savepv()> which allocates the duplicate string in memory |
| 805 | which is shared between threads. |
| 806 | |
| 807 | =cut |
| 808 | */ |
| 809 | char * |
| 810 | Perl_savesharedpv(pTHX_ const char *pv) |
| 811 | { |
| 812 | register char *newaddr; |
| 813 | STRLEN pvlen; |
| 814 | if (!pv) |
| 815 | return Nullch; |
| 816 | |
| 817 | pvlen = strlen(pv)+1; |
| 818 | newaddr = (char*)PerlMemShared_malloc(pvlen); |
| 819 | if (!newaddr) { |
| 820 | return S_write_no_mem(aTHX); |
| 821 | } |
| 822 | return memcpy(newaddr,pv,pvlen); |
| 823 | } |
| 824 | |
| 825 | /* |
| 826 | =for apidoc savesvpv |
| 827 | |
| 828 | A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from |
| 829 | the passed in SV using C<SvPV()> |
| 830 | |
| 831 | =cut |
| 832 | */ |
| 833 | |
| 834 | char * |
| 835 | Perl_savesvpv(pTHX_ SV *sv) |
| 836 | { |
| 837 | STRLEN len; |
| 838 | const char * const pv = SvPV_const(sv, len); |
| 839 | register char *newaddr; |
| 840 | |
| 841 | ++len; |
| 842 | Newx(newaddr,len,char); |
| 843 | return (char *) CopyD(pv,newaddr,len,char); |
| 844 | } |
| 845 | |
| 846 | |
| 847 | /* the SV for Perl_form() and mess() is not kept in an arena */ |
| 848 | |
| 849 | STATIC SV * |
| 850 | S_mess_alloc(pTHX) |
| 851 | { |
| 852 | SV *sv; |
| 853 | XPVMG *any; |
| 854 | |
| 855 | if (!PL_dirty) |
| 856 | return sv_2mortal(newSVpvn("",0)); |
| 857 | |
| 858 | if (PL_mess_sv) |
| 859 | return PL_mess_sv; |
| 860 | |
| 861 | /* Create as PVMG now, to avoid any upgrading later */ |
| 862 | Newx(sv, 1, SV); |
| 863 | Newxz(any, 1, XPVMG); |
| 864 | SvFLAGS(sv) = SVt_PVMG; |
| 865 | SvANY(sv) = (void*)any; |
| 866 | SvPV_set(sv, 0); |
| 867 | SvREFCNT(sv) = 1 << 30; /* practically infinite */ |
| 868 | PL_mess_sv = sv; |
| 869 | return sv; |
| 870 | } |
| 871 | |
| 872 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 873 | char * |
| 874 | Perl_form_nocontext(const char* pat, ...) |
| 875 | { |
| 876 | dTHX; |
| 877 | char *retval; |
| 878 | va_list args; |
| 879 | va_start(args, pat); |
| 880 | retval = vform(pat, &args); |
| 881 | va_end(args); |
| 882 | return retval; |
| 883 | } |
| 884 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 885 | |
| 886 | /* |
| 887 | =head1 Miscellaneous Functions |
| 888 | =for apidoc form |
| 889 | |
| 890 | Takes a sprintf-style format pattern and conventional |
| 891 | (non-SV) arguments and returns the formatted string. |
| 892 | |
| 893 | (char *) Perl_form(pTHX_ const char* pat, ...) |
| 894 | |
| 895 | can be used any place a string (char *) is required: |
| 896 | |
| 897 | char * s = Perl_form("%d.%d",major,minor); |
| 898 | |
| 899 | Uses a single private buffer so if you want to format several strings you |
| 900 | must explicitly copy the earlier strings away (and free the copies when you |
| 901 | are done). |
| 902 | |
| 903 | =cut |
| 904 | */ |
| 905 | |
| 906 | char * |
| 907 | Perl_form(pTHX_ const char* pat, ...) |
| 908 | { |
| 909 | char *retval; |
| 910 | va_list args; |
| 911 | va_start(args, pat); |
| 912 | retval = vform(pat, &args); |
| 913 | va_end(args); |
| 914 | return retval; |
| 915 | } |
| 916 | |
| 917 | char * |
| 918 | Perl_vform(pTHX_ const char *pat, va_list *args) |
| 919 | { |
| 920 | SV * const sv = mess_alloc(); |
| 921 | sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*)); |
| 922 | return SvPVX(sv); |
| 923 | } |
| 924 | |
| 925 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 926 | SV * |
| 927 | Perl_mess_nocontext(const char *pat, ...) |
| 928 | { |
| 929 | dTHX; |
| 930 | SV *retval; |
| 931 | va_list args; |
| 932 | va_start(args, pat); |
| 933 | retval = vmess(pat, &args); |
| 934 | va_end(args); |
| 935 | return retval; |
| 936 | } |
| 937 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 938 | |
| 939 | SV * |
| 940 | Perl_mess(pTHX_ const char *pat, ...) |
| 941 | { |
| 942 | SV *retval; |
| 943 | va_list args; |
| 944 | va_start(args, pat); |
| 945 | retval = vmess(pat, &args); |
| 946 | va_end(args); |
| 947 | return retval; |
| 948 | } |
| 949 | |
| 950 | STATIC COP* |
| 951 | S_closest_cop(pTHX_ COP *cop, const OP *o) |
| 952 | { |
| 953 | /* Look for PL_op starting from o. cop is the last COP we've seen. */ |
| 954 | |
| 955 | if (!o || o == PL_op) return cop; |
| 956 | |
| 957 | if (o->op_flags & OPf_KIDS) { |
| 958 | OP *kid; |
| 959 | for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) |
| 960 | { |
| 961 | COP *new_cop; |
| 962 | |
| 963 | /* If the OP_NEXTSTATE has been optimised away we can still use it |
| 964 | * the get the file and line number. */ |
| 965 | |
| 966 | if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE) |
| 967 | cop = (COP *)kid; |
| 968 | |
| 969 | /* Keep searching, and return when we've found something. */ |
| 970 | |
| 971 | new_cop = closest_cop(cop, kid); |
| 972 | if (new_cop) return new_cop; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | /* Nothing found. */ |
| 977 | |
| 978 | return Null(COP *); |
| 979 | } |
| 980 | |
| 981 | SV * |
| 982 | Perl_vmess(pTHX_ const char *pat, va_list *args) |
| 983 | { |
| 984 | SV * const sv = mess_alloc(); |
| 985 | static const char dgd[] = " during global destruction.\n"; |
| 986 | |
| 987 | sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*)); |
| 988 | if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') { |
| 989 | |
| 990 | /* |
| 991 | * Try and find the file and line for PL_op. This will usually be |
| 992 | * PL_curcop, but it might be a cop that has been optimised away. We |
| 993 | * can try to find such a cop by searching through the optree starting |
| 994 | * from the sibling of PL_curcop. |
| 995 | */ |
| 996 | |
| 997 | const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling); |
| 998 | if (!cop) cop = PL_curcop; |
| 999 | |
| 1000 | if (CopLINE(cop)) |
| 1001 | Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf, |
| 1002 | OutCopFILE(cop), (IV)CopLINE(cop)); |
| 1003 | if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) { |
| 1004 | const bool line_mode = (RsSIMPLE(PL_rs) && |
| 1005 | SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n'); |
| 1006 | Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf, |
| 1007 | PL_last_in_gv == PL_argvgv ? |
| 1008 | "" : GvNAME(PL_last_in_gv), |
| 1009 | line_mode ? "line" : "chunk", |
| 1010 | (IV)IoLINES(GvIOp(PL_last_in_gv))); |
| 1011 | } |
| 1012 | sv_catpv(sv, PL_dirty ? dgd : ".\n"); |
| 1013 | } |
| 1014 | return sv; |
| 1015 | } |
| 1016 | |
| 1017 | void |
| 1018 | Perl_write_to_stderr(pTHX_ const char* message, int msglen) |
| 1019 | { |
| 1020 | dVAR; |
| 1021 | IO *io; |
| 1022 | MAGIC *mg; |
| 1023 | |
| 1024 | if (PL_stderrgv && SvREFCNT(PL_stderrgv) |
| 1025 | && (io = GvIO(PL_stderrgv)) |
| 1026 | && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) |
| 1027 | { |
| 1028 | dSP; |
| 1029 | ENTER; |
| 1030 | SAVETMPS; |
| 1031 | |
| 1032 | save_re_context(); |
| 1033 | SAVESPTR(PL_stderrgv); |
| 1034 | PL_stderrgv = Nullgv; |
| 1035 | |
| 1036 | PUSHSTACKi(PERLSI_MAGIC); |
| 1037 | |
| 1038 | PUSHMARK(SP); |
| 1039 | EXTEND(SP,2); |
| 1040 | PUSHs(SvTIED_obj((SV*)io, mg)); |
| 1041 | PUSHs(sv_2mortal(newSVpvn(message, msglen))); |
| 1042 | PUTBACK; |
| 1043 | call_method("PRINT", G_SCALAR); |
| 1044 | |
| 1045 | POPSTACK; |
| 1046 | FREETMPS; |
| 1047 | LEAVE; |
| 1048 | } |
| 1049 | else { |
| 1050 | #ifdef USE_SFIO |
| 1051 | /* SFIO can really mess with your errno */ |
| 1052 | const int e = errno; |
| 1053 | #endif |
| 1054 | PerlIO * const serr = Perl_error_log; |
| 1055 | |
| 1056 | PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen); |
| 1057 | (void)PerlIO_flush(serr); |
| 1058 | #ifdef USE_SFIO |
| 1059 | errno = e; |
| 1060 | #endif |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | /* Common code used by vcroak, vdie and vwarner */ |
| 1065 | |
| 1066 | STATIC void |
| 1067 | S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8) |
| 1068 | { |
| 1069 | HV *stash; |
| 1070 | GV *gv; |
| 1071 | CV *cv; |
| 1072 | /* sv_2cv might call Perl_croak() */ |
| 1073 | SV * const olddiehook = PL_diehook; |
| 1074 | |
| 1075 | assert(PL_diehook); |
| 1076 | ENTER; |
| 1077 | SAVESPTR(PL_diehook); |
| 1078 | PL_diehook = Nullsv; |
| 1079 | cv = sv_2cv(olddiehook, &stash, &gv, 0); |
| 1080 | LEAVE; |
| 1081 | if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) { |
| 1082 | dSP; |
| 1083 | SV *msg; |
| 1084 | |
| 1085 | ENTER; |
| 1086 | save_re_context(); |
| 1087 | if (message) { |
| 1088 | msg = newSVpvn(message, msglen); |
| 1089 | SvFLAGS(msg) |= utf8; |
| 1090 | SvREADONLY_on(msg); |
| 1091 | SAVEFREESV(msg); |
| 1092 | } |
| 1093 | else { |
| 1094 | msg = ERRSV; |
| 1095 | } |
| 1096 | |
| 1097 | PUSHSTACKi(PERLSI_DIEHOOK); |
| 1098 | PUSHMARK(SP); |
| 1099 | XPUSHs(msg); |
| 1100 | PUTBACK; |
| 1101 | call_sv((SV*)cv, G_DISCARD); |
| 1102 | POPSTACK; |
| 1103 | LEAVE; |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | STATIC const char * |
| 1108 | S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen, |
| 1109 | I32* utf8) |
| 1110 | { |
| 1111 | dVAR; |
| 1112 | const char *message; |
| 1113 | |
| 1114 | if (pat) { |
| 1115 | SV * const msv = vmess(pat, args); |
| 1116 | if (PL_errors && SvCUR(PL_errors)) { |
| 1117 | sv_catsv(PL_errors, msv); |
| 1118 | message = SvPV_const(PL_errors, *msglen); |
| 1119 | SvCUR_set(PL_errors, 0); |
| 1120 | } |
| 1121 | else |
| 1122 | message = SvPV_const(msv,*msglen); |
| 1123 | *utf8 = SvUTF8(msv); |
| 1124 | } |
| 1125 | else { |
| 1126 | message = Nullch; |
| 1127 | } |
| 1128 | |
| 1129 | DEBUG_S(PerlIO_printf(Perl_debug_log, |
| 1130 | "%p: die/croak: message = %s\ndiehook = %p\n", |
| 1131 | thr, message, PL_diehook)); |
| 1132 | if (PL_diehook) { |
| 1133 | S_vdie_common(aTHX_ message, *msglen, *utf8); |
| 1134 | } |
| 1135 | return message; |
| 1136 | } |
| 1137 | |
| 1138 | OP * |
| 1139 | Perl_vdie(pTHX_ const char* pat, va_list *args) |
| 1140 | { |
| 1141 | const char *message; |
| 1142 | const int was_in_eval = PL_in_eval; |
| 1143 | STRLEN msglen; |
| 1144 | I32 utf8 = 0; |
| 1145 | |
| 1146 | DEBUG_S(PerlIO_printf(Perl_debug_log, |
| 1147 | "%p: die: curstack = %p, mainstack = %p\n", |
| 1148 | thr, PL_curstack, PL_mainstack)); |
| 1149 | |
| 1150 | message = vdie_croak_common(pat, args, &msglen, &utf8); |
| 1151 | |
| 1152 | PL_restartop = die_where(message, msglen); |
| 1153 | SvFLAGS(ERRSV) |= utf8; |
| 1154 | DEBUG_S(PerlIO_printf(Perl_debug_log, |
| 1155 | "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n", |
| 1156 | thr, PL_restartop, was_in_eval, PL_top_env)); |
| 1157 | if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev) |
| 1158 | JMPENV_JUMP(3); |
| 1159 | return PL_restartop; |
| 1160 | } |
| 1161 | |
| 1162 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1163 | OP * |
| 1164 | Perl_die_nocontext(const char* pat, ...) |
| 1165 | { |
| 1166 | dTHX; |
| 1167 | OP *o; |
| 1168 | va_list args; |
| 1169 | va_start(args, pat); |
| 1170 | o = vdie(pat, &args); |
| 1171 | va_end(args); |
| 1172 | return o; |
| 1173 | } |
| 1174 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1175 | |
| 1176 | OP * |
| 1177 | Perl_die(pTHX_ const char* pat, ...) |
| 1178 | { |
| 1179 | OP *o; |
| 1180 | va_list args; |
| 1181 | va_start(args, pat); |
| 1182 | o = vdie(pat, &args); |
| 1183 | va_end(args); |
| 1184 | return o; |
| 1185 | } |
| 1186 | |
| 1187 | void |
| 1188 | Perl_vcroak(pTHX_ const char* pat, va_list *args) |
| 1189 | { |
| 1190 | const char *message; |
| 1191 | STRLEN msglen; |
| 1192 | I32 utf8 = 0; |
| 1193 | |
| 1194 | message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8); |
| 1195 | |
| 1196 | if (PL_in_eval) { |
| 1197 | PL_restartop = die_where(message, msglen); |
| 1198 | SvFLAGS(ERRSV) |= utf8; |
| 1199 | JMPENV_JUMP(3); |
| 1200 | } |
| 1201 | else if (!message) |
| 1202 | message = SvPVx_const(ERRSV, msglen); |
| 1203 | |
| 1204 | write_to_stderr(message, msglen); |
| 1205 | my_failure_exit(); |
| 1206 | } |
| 1207 | |
| 1208 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1209 | void |
| 1210 | Perl_croak_nocontext(const char *pat, ...) |
| 1211 | { |
| 1212 | dTHX; |
| 1213 | va_list args; |
| 1214 | va_start(args, pat); |
| 1215 | vcroak(pat, &args); |
| 1216 | /* NOTREACHED */ |
| 1217 | va_end(args); |
| 1218 | } |
| 1219 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1220 | |
| 1221 | /* |
| 1222 | =head1 Warning and Dieing |
| 1223 | |
| 1224 | =for apidoc croak |
| 1225 | |
| 1226 | This is the XSUB-writer's interface to Perl's C<die> function. |
| 1227 | Normally call this function the same way you call the C C<printf> |
| 1228 | function. Calling C<croak> returns control directly to Perl, |
| 1229 | sidestepping the normal C order of execution. See C<warn>. |
| 1230 | |
| 1231 | If you want to throw an exception object, assign the object to |
| 1232 | C<$@> and then pass C<Nullch> to croak(): |
| 1233 | |
| 1234 | errsv = get_sv("@", TRUE); |
| 1235 | sv_setsv(errsv, exception_object); |
| 1236 | croak(Nullch); |
| 1237 | |
| 1238 | =cut |
| 1239 | */ |
| 1240 | |
| 1241 | void |
| 1242 | Perl_croak(pTHX_ const char *pat, ...) |
| 1243 | { |
| 1244 | va_list args; |
| 1245 | va_start(args, pat); |
| 1246 | vcroak(pat, &args); |
| 1247 | /* NOTREACHED */ |
| 1248 | va_end(args); |
| 1249 | } |
| 1250 | |
| 1251 | void |
| 1252 | Perl_vwarn(pTHX_ const char* pat, va_list *args) |
| 1253 | { |
| 1254 | dVAR; |
| 1255 | STRLEN msglen; |
| 1256 | SV * const msv = vmess(pat, args); |
| 1257 | const I32 utf8 = SvUTF8(msv); |
| 1258 | const char * const message = SvPV_const(msv, msglen); |
| 1259 | |
| 1260 | if (PL_warnhook) { |
| 1261 | /* sv_2cv might call Perl_warn() */ |
| 1262 | SV * const oldwarnhook = PL_warnhook; |
| 1263 | CV * cv; |
| 1264 | HV * stash; |
| 1265 | GV * gv; |
| 1266 | |
| 1267 | ENTER; |
| 1268 | SAVESPTR(PL_warnhook); |
| 1269 | PL_warnhook = Nullsv; |
| 1270 | cv = sv_2cv(oldwarnhook, &stash, &gv, 0); |
| 1271 | LEAVE; |
| 1272 | if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) { |
| 1273 | dSP; |
| 1274 | SV *msg; |
| 1275 | |
| 1276 | ENTER; |
| 1277 | SAVESPTR(PL_warnhook); |
| 1278 | PL_warnhook = Nullsv; |
| 1279 | save_re_context(); |
| 1280 | msg = newSVpvn(message, msglen); |
| 1281 | SvFLAGS(msg) |= utf8; |
| 1282 | SvREADONLY_on(msg); |
| 1283 | SAVEFREESV(msg); |
| 1284 | |
| 1285 | PUSHSTACKi(PERLSI_WARNHOOK); |
| 1286 | PUSHMARK(SP); |
| 1287 | XPUSHs(msg); |
| 1288 | PUTBACK; |
| 1289 | call_sv((SV*)cv, G_DISCARD); |
| 1290 | POPSTACK; |
| 1291 | LEAVE; |
| 1292 | return; |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | write_to_stderr(message, msglen); |
| 1297 | } |
| 1298 | |
| 1299 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1300 | void |
| 1301 | Perl_warn_nocontext(const char *pat, ...) |
| 1302 | { |
| 1303 | dTHX; |
| 1304 | va_list args; |
| 1305 | va_start(args, pat); |
| 1306 | vwarn(pat, &args); |
| 1307 | va_end(args); |
| 1308 | } |
| 1309 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1310 | |
| 1311 | /* |
| 1312 | =for apidoc warn |
| 1313 | |
| 1314 | This is the XSUB-writer's interface to Perl's C<warn> function. Call this |
| 1315 | function the same way you call the C C<printf> function. See C<croak>. |
| 1316 | |
| 1317 | =cut |
| 1318 | */ |
| 1319 | |
| 1320 | void |
| 1321 | Perl_warn(pTHX_ const char *pat, ...) |
| 1322 | { |
| 1323 | va_list args; |
| 1324 | va_start(args, pat); |
| 1325 | vwarn(pat, &args); |
| 1326 | va_end(args); |
| 1327 | } |
| 1328 | |
| 1329 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1330 | void |
| 1331 | Perl_warner_nocontext(U32 err, const char *pat, ...) |
| 1332 | { |
| 1333 | dTHX; |
| 1334 | va_list args; |
| 1335 | va_start(args, pat); |
| 1336 | vwarner(err, pat, &args); |
| 1337 | va_end(args); |
| 1338 | } |
| 1339 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1340 | |
| 1341 | void |
| 1342 | Perl_warner(pTHX_ U32 err, const char* pat,...) |
| 1343 | { |
| 1344 | va_list args; |
| 1345 | va_start(args, pat); |
| 1346 | vwarner(err, pat, &args); |
| 1347 | va_end(args); |
| 1348 | } |
| 1349 | |
| 1350 | void |
| 1351 | Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args) |
| 1352 | { |
| 1353 | dVAR; |
| 1354 | if (ckDEAD(err)) { |
| 1355 | SV * const msv = vmess(pat, args); |
| 1356 | STRLEN msglen; |
| 1357 | const char * const message = SvPV_const(msv, msglen); |
| 1358 | const I32 utf8 = SvUTF8(msv); |
| 1359 | |
| 1360 | if (PL_diehook) { |
| 1361 | assert(message); |
| 1362 | S_vdie_common(aTHX_ message, msglen, utf8); |
| 1363 | } |
| 1364 | if (PL_in_eval) { |
| 1365 | PL_restartop = die_where(message, msglen); |
| 1366 | SvFLAGS(ERRSV) |= utf8; |
| 1367 | JMPENV_JUMP(3); |
| 1368 | } |
| 1369 | write_to_stderr(message, msglen); |
| 1370 | my_failure_exit(); |
| 1371 | } |
| 1372 | else { |
| 1373 | Perl_vwarn(aTHX_ pat, args); |
| 1374 | } |
| 1375 | } |
| 1376 | |
| 1377 | /* implements the ckWARN? macros */ |
| 1378 | |
| 1379 | bool |
| 1380 | Perl_ckwarn(pTHX_ U32 w) |
| 1381 | { |
| 1382 | return |
| 1383 | ( |
| 1384 | isLEXWARN_on |
| 1385 | && PL_curcop->cop_warnings != pWARN_NONE |
| 1386 | && ( |
| 1387 | PL_curcop->cop_warnings == pWARN_ALL |
| 1388 | || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w)) |
| 1389 | || (unpackWARN2(w) && |
| 1390 | isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w))) |
| 1391 | || (unpackWARN3(w) && |
| 1392 | isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w))) |
| 1393 | || (unpackWARN4(w) && |
| 1394 | isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w))) |
| 1395 | ) |
| 1396 | ) |
| 1397 | || |
| 1398 | ( |
| 1399 | isLEXWARN_off && PL_dowarn & G_WARN_ON |
| 1400 | ) |
| 1401 | ; |
| 1402 | } |
| 1403 | |
| 1404 | /* implements the ckWARN?_d macro */ |
| 1405 | |
| 1406 | bool |
| 1407 | Perl_ckwarn_d(pTHX_ U32 w) |
| 1408 | { |
| 1409 | return |
| 1410 | isLEXWARN_off |
| 1411 | || PL_curcop->cop_warnings == pWARN_ALL |
| 1412 | || ( |
| 1413 | PL_curcop->cop_warnings != pWARN_NONE |
| 1414 | && ( |
| 1415 | isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w)) |
| 1416 | || (unpackWARN2(w) && |
| 1417 | isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w))) |
| 1418 | || (unpackWARN3(w) && |
| 1419 | isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w))) |
| 1420 | || (unpackWARN4(w) && |
| 1421 | isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w))) |
| 1422 | ) |
| 1423 | ) |
| 1424 | ; |
| 1425 | } |
| 1426 | |
| 1427 | |
| 1428 | |
| 1429 | /* since we've already done strlen() for both nam and val |
| 1430 | * we can use that info to make things faster than |
| 1431 | * sprintf(s, "%s=%s", nam, val) |
| 1432 | */ |
| 1433 | #define my_setenv_format(s, nam, nlen, val, vlen) \ |
| 1434 | Copy(nam, s, nlen, char); \ |
| 1435 | *(s+nlen) = '='; \ |
| 1436 | Copy(val, s+(nlen+1), vlen, char); \ |
| 1437 | *(s+(nlen+1+vlen)) = '\0' |
| 1438 | |
| 1439 | #ifdef USE_ENVIRON_ARRAY |
| 1440 | /* VMS' my_setenv() is in vms.c */ |
| 1441 | #if !defined(WIN32) && !defined(NETWARE) |
| 1442 | void |
| 1443 | Perl_my_setenv(pTHX_ const char *nam, const char *val) |
| 1444 | { |
| 1445 | dVAR; |
| 1446 | #ifdef USE_ITHREADS |
| 1447 | /* only parent thread can modify process environment */ |
| 1448 | if (PL_curinterp == aTHX) |
| 1449 | #endif |
| 1450 | { |
| 1451 | #ifndef PERL_USE_SAFE_PUTENV |
| 1452 | if (!PL_use_safe_putenv) { |
| 1453 | /* most putenv()s leak, so we manipulate environ directly */ |
| 1454 | register I32 i=setenv_getix(nam); /* where does it go? */ |
| 1455 | int nlen, vlen; |
| 1456 | |
| 1457 | if (environ == PL_origenviron) { /* need we copy environment? */ |
| 1458 | I32 j; |
| 1459 | I32 max; |
| 1460 | char **tmpenv; |
| 1461 | |
| 1462 | for (max = i; environ[max]; max++) ; |
| 1463 | tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*)); |
| 1464 | for (j=0; j<max; j++) { /* copy environment */ |
| 1465 | const int len = strlen(environ[j]); |
| 1466 | tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char)); |
| 1467 | Copy(environ[j], tmpenv[j], len+1, char); |
| 1468 | } |
| 1469 | tmpenv[max] = Nullch; |
| 1470 | environ = tmpenv; /* tell exec where it is now */ |
| 1471 | } |
| 1472 | if (!val) { |
| 1473 | safesysfree(environ[i]); |
| 1474 | while (environ[i]) { |
| 1475 | environ[i] = environ[i+1]; |
| 1476 | i++; |
| 1477 | } |
| 1478 | return; |
| 1479 | } |
| 1480 | if (!environ[i]) { /* does not exist yet */ |
| 1481 | environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*)); |
| 1482 | environ[i+1] = Nullch; /* make sure it's null terminated */ |
| 1483 | } |
| 1484 | else |
| 1485 | safesysfree(environ[i]); |
| 1486 | nlen = strlen(nam); |
| 1487 | vlen = strlen(val); |
| 1488 | |
| 1489 | environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char)); |
| 1490 | /* all that work just for this */ |
| 1491 | my_setenv_format(environ[i], nam, nlen, val, vlen); |
| 1492 | } else { |
| 1493 | # endif |
| 1494 | # if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) |
| 1495 | # if defined(HAS_UNSETENV) |
| 1496 | if (val == NULL) { |
| 1497 | (void)unsetenv(nam); |
| 1498 | } else { |
| 1499 | (void)setenv(nam, val, 1); |
| 1500 | } |
| 1501 | # else /* ! HAS_UNSETENV */ |
| 1502 | (void)setenv(nam, val, 1); |
| 1503 | # endif /* HAS_UNSETENV */ |
| 1504 | # else |
| 1505 | # if defined(HAS_UNSETENV) |
| 1506 | if (val == NULL) { |
| 1507 | (void)unsetenv(nam); |
| 1508 | } else { |
| 1509 | const int nlen = strlen(nam); |
| 1510 | const int vlen = strlen(val); |
| 1511 | char * const new_env = |
| 1512 | (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char)); |
| 1513 | my_setenv_format(new_env, nam, nlen, val, vlen); |
| 1514 | (void)putenv(new_env); |
| 1515 | } |
| 1516 | # else /* ! HAS_UNSETENV */ |
| 1517 | char *new_env; |
| 1518 | const int nlen = strlen(nam); |
| 1519 | int vlen; |
| 1520 | if (!val) { |
| 1521 | val = ""; |
| 1522 | } |
| 1523 | vlen = strlen(val); |
| 1524 | new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char)); |
| 1525 | /* all that work just for this */ |
| 1526 | my_setenv_format(new_env, nam, nlen, val, vlen); |
| 1527 | (void)putenv(new_env); |
| 1528 | # endif /* HAS_UNSETENV */ |
| 1529 | # endif /* __CYGWIN__ */ |
| 1530 | #ifndef PERL_USE_SAFE_PUTENV |
| 1531 | } |
| 1532 | #endif |
| 1533 | } |
| 1534 | } |
| 1535 | |
| 1536 | #else /* WIN32 || NETWARE */ |
| 1537 | |
| 1538 | void |
| 1539 | Perl_my_setenv(pTHX_ const char *nam, const char *val) |
| 1540 | { |
| 1541 | dVAR; |
| 1542 | register char *envstr; |
| 1543 | const int nlen = strlen(nam); |
| 1544 | int vlen; |
| 1545 | |
| 1546 | if (!val) { |
| 1547 | val = ""; |
| 1548 | } |
| 1549 | vlen = strlen(val); |
| 1550 | Newx(envstr, nlen+vlen+2, char); |
| 1551 | my_setenv_format(envstr, nam, nlen, val, vlen); |
| 1552 | (void)PerlEnv_putenv(envstr); |
| 1553 | Safefree(envstr); |
| 1554 | } |
| 1555 | |
| 1556 | #endif /* WIN32 || NETWARE */ |
| 1557 | |
| 1558 | #ifndef PERL_MICRO |
| 1559 | I32 |
| 1560 | Perl_setenv_getix(pTHX_ const char *nam) |
| 1561 | { |
| 1562 | register I32 i; |
| 1563 | register const I32 len = strlen(nam); |
| 1564 | |
| 1565 | for (i = 0; environ[i]; i++) { |
| 1566 | if ( |
| 1567 | #ifdef WIN32 |
| 1568 | strnicmp(environ[i],nam,len) == 0 |
| 1569 | #else |
| 1570 | strnEQ(environ[i],nam,len) |
| 1571 | #endif |
| 1572 | && environ[i][len] == '=') |
| 1573 | break; /* strnEQ must come first to avoid */ |
| 1574 | } /* potential SEGV's */ |
| 1575 | return i; |
| 1576 | } |
| 1577 | #endif /* !PERL_MICRO */ |
| 1578 | |
| 1579 | #endif /* !VMS && !EPOC*/ |
| 1580 | |
| 1581 | #ifdef UNLINK_ALL_VERSIONS |
| 1582 | I32 |
| 1583 | Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */ |
| 1584 | { |
| 1585 | I32 i; |
| 1586 | |
| 1587 | for (i = 0; PerlLIO_unlink(f) >= 0; i++) ; |
| 1588 | return i ? 0 : -1; |
| 1589 | } |
| 1590 | #endif |
| 1591 | |
| 1592 | /* this is a drop-in replacement for bcopy() */ |
| 1593 | #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY)) |
| 1594 | char * |
| 1595 | Perl_my_bcopy(register const char *from,register char *to,register I32 len) |
| 1596 | { |
| 1597 | char * const retval = to; |
| 1598 | |
| 1599 | if (from - to >= 0) { |
| 1600 | while (len--) |
| 1601 | *to++ = *from++; |
| 1602 | } |
| 1603 | else { |
| 1604 | to += len; |
| 1605 | from += len; |
| 1606 | while (len--) |
| 1607 | *(--to) = *(--from); |
| 1608 | } |
| 1609 | return retval; |
| 1610 | } |
| 1611 | #endif |
| 1612 | |
| 1613 | /* this is a drop-in replacement for memset() */ |
| 1614 | #ifndef HAS_MEMSET |
| 1615 | void * |
| 1616 | Perl_my_memset(register char *loc, register I32 ch, register I32 len) |
| 1617 | { |
| 1618 | char * const retval = loc; |
| 1619 | |
| 1620 | while (len--) |
| 1621 | *loc++ = ch; |
| 1622 | return retval; |
| 1623 | } |
| 1624 | #endif |
| 1625 | |
| 1626 | /* this is a drop-in replacement for bzero() */ |
| 1627 | #if !defined(HAS_BZERO) && !defined(HAS_MEMSET) |
| 1628 | char * |
| 1629 | Perl_my_bzero(register char *loc, register I32 len) |
| 1630 | { |
| 1631 | char * const retval = loc; |
| 1632 | |
| 1633 | while (len--) |
| 1634 | *loc++ = 0; |
| 1635 | return retval; |
| 1636 | } |
| 1637 | #endif |
| 1638 | |
| 1639 | /* this is a drop-in replacement for memcmp() */ |
| 1640 | #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP) |
| 1641 | I32 |
| 1642 | Perl_my_memcmp(const char *s1, const char *s2, register I32 len) |
| 1643 | { |
| 1644 | register const U8 *a = (const U8 *)s1; |
| 1645 | register const U8 *b = (const U8 *)s2; |
| 1646 | register I32 tmp; |
| 1647 | |
| 1648 | while (len--) { |
| 1649 | if ((tmp = *a++ - *b++)) |
| 1650 | return tmp; |
| 1651 | } |
| 1652 | return 0; |
| 1653 | } |
| 1654 | #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */ |
| 1655 | |
| 1656 | #ifndef HAS_VPRINTF |
| 1657 | |
| 1658 | #ifdef USE_CHAR_VSPRINTF |
| 1659 | char * |
| 1660 | #else |
| 1661 | int |
| 1662 | #endif |
| 1663 | vsprintf(char *dest, const char *pat, char *args) |
| 1664 | { |
| 1665 | FILE fakebuf; |
| 1666 | |
| 1667 | fakebuf._ptr = dest; |
| 1668 | fakebuf._cnt = 32767; |
| 1669 | #ifndef _IOSTRG |
| 1670 | #define _IOSTRG 0 |
| 1671 | #endif |
| 1672 | fakebuf._flag = _IOWRT|_IOSTRG; |
| 1673 | _doprnt(pat, args, &fakebuf); /* what a kludge */ |
| 1674 | (void)putc('\0', &fakebuf); |
| 1675 | #ifdef USE_CHAR_VSPRINTF |
| 1676 | return(dest); |
| 1677 | #else |
| 1678 | return 0; /* perl doesn't use return value */ |
| 1679 | #endif |
| 1680 | } |
| 1681 | |
| 1682 | #endif /* HAS_VPRINTF */ |
| 1683 | |
| 1684 | #ifdef MYSWAP |
| 1685 | #if BYTEORDER != 0x4321 |
| 1686 | short |
| 1687 | Perl_my_swap(pTHX_ short s) |
| 1688 | { |
| 1689 | #if (BYTEORDER & 1) == 0 |
| 1690 | short result; |
| 1691 | |
| 1692 | result = ((s & 255) << 8) + ((s >> 8) & 255); |
| 1693 | return result; |
| 1694 | #else |
| 1695 | return s; |
| 1696 | #endif |
| 1697 | } |
| 1698 | |
| 1699 | long |
| 1700 | Perl_my_htonl(pTHX_ long l) |
| 1701 | { |
| 1702 | union { |
| 1703 | long result; |
| 1704 | char c[sizeof(long)]; |
| 1705 | } u; |
| 1706 | |
| 1707 | #if BYTEORDER == 0x1234 |
| 1708 | u.c[0] = (l >> 24) & 255; |
| 1709 | u.c[1] = (l >> 16) & 255; |
| 1710 | u.c[2] = (l >> 8) & 255; |
| 1711 | u.c[3] = l & 255; |
| 1712 | return u.result; |
| 1713 | #else |
| 1714 | #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) |
| 1715 | Perl_croak(aTHX_ "Unknown BYTEORDER\n"); |
| 1716 | #else |
| 1717 | register I32 o; |
| 1718 | register I32 s; |
| 1719 | |
| 1720 | for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { |
| 1721 | u.c[o & 0xf] = (l >> s) & 255; |
| 1722 | } |
| 1723 | return u.result; |
| 1724 | #endif |
| 1725 | #endif |
| 1726 | } |
| 1727 | |
| 1728 | long |
| 1729 | Perl_my_ntohl(pTHX_ long l) |
| 1730 | { |
| 1731 | union { |
| 1732 | long l; |
| 1733 | char c[sizeof(long)]; |
| 1734 | } u; |
| 1735 | |
| 1736 | #if BYTEORDER == 0x1234 |
| 1737 | u.c[0] = (l >> 24) & 255; |
| 1738 | u.c[1] = (l >> 16) & 255; |
| 1739 | u.c[2] = (l >> 8) & 255; |
| 1740 | u.c[3] = l & 255; |
| 1741 | return u.l; |
| 1742 | #else |
| 1743 | #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) |
| 1744 | Perl_croak(aTHX_ "Unknown BYTEORDER\n"); |
| 1745 | #else |
| 1746 | register I32 o; |
| 1747 | register I32 s; |
| 1748 | |
| 1749 | u.l = l; |
| 1750 | l = 0; |
| 1751 | for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { |
| 1752 | l |= (u.c[o & 0xf] & 255) << s; |
| 1753 | } |
| 1754 | return l; |
| 1755 | #endif |
| 1756 | #endif |
| 1757 | } |
| 1758 | |
| 1759 | #endif /* BYTEORDER != 0x4321 */ |
| 1760 | #endif /* MYSWAP */ |
| 1761 | |
| 1762 | /* |
| 1763 | * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'. |
| 1764 | * If these functions are defined, |
| 1765 | * the BYTEORDER is neither 0x1234 nor 0x4321. |
| 1766 | * However, this is not assumed. |
| 1767 | * -DWS |
| 1768 | */ |
| 1769 | |
| 1770 | #define HTOLE(name,type) \ |
| 1771 | type \ |
| 1772 | name (register type n) \ |
| 1773 | { \ |
| 1774 | union { \ |
| 1775 | type value; \ |
| 1776 | char c[sizeof(type)]; \ |
| 1777 | } u; \ |
| 1778 | register I32 i; \ |
| 1779 | register I32 s = 0; \ |
| 1780 | for (i = 0; i < sizeof(u.c); i++, s += 8) { \ |
| 1781 | u.c[i] = (n >> s) & 0xFF; \ |
| 1782 | } \ |
| 1783 | return u.value; \ |
| 1784 | } |
| 1785 | |
| 1786 | #define LETOH(name,type) \ |
| 1787 | type \ |
| 1788 | name (register type n) \ |
| 1789 | { \ |
| 1790 | union { \ |
| 1791 | type value; \ |
| 1792 | char c[sizeof(type)]; \ |
| 1793 | } u; \ |
| 1794 | register I32 i; \ |
| 1795 | register I32 s = 0; \ |
| 1796 | u.value = n; \ |
| 1797 | n = 0; \ |
| 1798 | for (i = 0; i < sizeof(u.c); i++, s += 8) { \ |
| 1799 | n |= ((type)(u.c[i] & 0xFF)) << s; \ |
| 1800 | } \ |
| 1801 | return n; \ |
| 1802 | } |
| 1803 | |
| 1804 | /* |
| 1805 | * Big-endian byte order functions. |
| 1806 | */ |
| 1807 | |
| 1808 | #define HTOBE(name,type) \ |
| 1809 | type \ |
| 1810 | name (register type n) \ |
| 1811 | { \ |
| 1812 | union { \ |
| 1813 | type value; \ |
| 1814 | char c[sizeof(type)]; \ |
| 1815 | } u; \ |
| 1816 | register I32 i; \ |
| 1817 | register I32 s = 8*(sizeof(u.c)-1); \ |
| 1818 | for (i = 0; i < sizeof(u.c); i++, s -= 8) { \ |
| 1819 | u.c[i] = (n >> s) & 0xFF; \ |
| 1820 | } \ |
| 1821 | return u.value; \ |
| 1822 | } |
| 1823 | |
| 1824 | #define BETOH(name,type) \ |
| 1825 | type \ |
| 1826 | name (register type n) \ |
| 1827 | { \ |
| 1828 | union { \ |
| 1829 | type value; \ |
| 1830 | char c[sizeof(type)]; \ |
| 1831 | } u; \ |
| 1832 | register I32 i; \ |
| 1833 | register I32 s = 8*(sizeof(u.c)-1); \ |
| 1834 | u.value = n; \ |
| 1835 | n = 0; \ |
| 1836 | for (i = 0; i < sizeof(u.c); i++, s -= 8) { \ |
| 1837 | n |= ((type)(u.c[i] & 0xFF)) << s; \ |
| 1838 | } \ |
| 1839 | return n; \ |
| 1840 | } |
| 1841 | |
| 1842 | /* |
| 1843 | * If we just can't do it... |
| 1844 | */ |
| 1845 | |
| 1846 | #define NOT_AVAIL(name,type) \ |
| 1847 | type \ |
| 1848 | name (register type n) \ |
| 1849 | { \ |
| 1850 | Perl_croak_nocontext(#name "() not available"); \ |
| 1851 | return n; /* not reached */ \ |
| 1852 | } |
| 1853 | |
| 1854 | |
| 1855 | #if defined(HAS_HTOVS) && !defined(htovs) |
| 1856 | HTOLE(htovs,short) |
| 1857 | #endif |
| 1858 | #if defined(HAS_HTOVL) && !defined(htovl) |
| 1859 | HTOLE(htovl,long) |
| 1860 | #endif |
| 1861 | #if defined(HAS_VTOHS) && !defined(vtohs) |
| 1862 | LETOH(vtohs,short) |
| 1863 | #endif |
| 1864 | #if defined(HAS_VTOHL) && !defined(vtohl) |
| 1865 | LETOH(vtohl,long) |
| 1866 | #endif |
| 1867 | |
| 1868 | #ifdef PERL_NEED_MY_HTOLE16 |
| 1869 | # if U16SIZE == 2 |
| 1870 | HTOLE(Perl_my_htole16,U16) |
| 1871 | # else |
| 1872 | NOT_AVAIL(Perl_my_htole16,U16) |
| 1873 | # endif |
| 1874 | #endif |
| 1875 | #ifdef PERL_NEED_MY_LETOH16 |
| 1876 | # if U16SIZE == 2 |
| 1877 | LETOH(Perl_my_letoh16,U16) |
| 1878 | # else |
| 1879 | NOT_AVAIL(Perl_my_letoh16,U16) |
| 1880 | # endif |
| 1881 | #endif |
| 1882 | #ifdef PERL_NEED_MY_HTOBE16 |
| 1883 | # if U16SIZE == 2 |
| 1884 | HTOBE(Perl_my_htobe16,U16) |
| 1885 | # else |
| 1886 | NOT_AVAIL(Perl_my_htobe16,U16) |
| 1887 | # endif |
| 1888 | #endif |
| 1889 | #ifdef PERL_NEED_MY_BETOH16 |
| 1890 | # if U16SIZE == 2 |
| 1891 | BETOH(Perl_my_betoh16,U16) |
| 1892 | # else |
| 1893 | NOT_AVAIL(Perl_my_betoh16,U16) |
| 1894 | # endif |
| 1895 | #endif |
| 1896 | |
| 1897 | #ifdef PERL_NEED_MY_HTOLE32 |
| 1898 | # if U32SIZE == 4 |
| 1899 | HTOLE(Perl_my_htole32,U32) |
| 1900 | # else |
| 1901 | NOT_AVAIL(Perl_my_htole32,U32) |
| 1902 | # endif |
| 1903 | #endif |
| 1904 | #ifdef PERL_NEED_MY_LETOH32 |
| 1905 | # if U32SIZE == 4 |
| 1906 | LETOH(Perl_my_letoh32,U32) |
| 1907 | # else |
| 1908 | NOT_AVAIL(Perl_my_letoh32,U32) |
| 1909 | # endif |
| 1910 | #endif |
| 1911 | #ifdef PERL_NEED_MY_HTOBE32 |
| 1912 | # if U32SIZE == 4 |
| 1913 | HTOBE(Perl_my_htobe32,U32) |
| 1914 | # else |
| 1915 | NOT_AVAIL(Perl_my_htobe32,U32) |
| 1916 | # endif |
| 1917 | #endif |
| 1918 | #ifdef PERL_NEED_MY_BETOH32 |
| 1919 | # if U32SIZE == 4 |
| 1920 | BETOH(Perl_my_betoh32,U32) |
| 1921 | # else |
| 1922 | NOT_AVAIL(Perl_my_betoh32,U32) |
| 1923 | # endif |
| 1924 | #endif |
| 1925 | |
| 1926 | #ifdef PERL_NEED_MY_HTOLE64 |
| 1927 | # if U64SIZE == 8 |
| 1928 | HTOLE(Perl_my_htole64,U64) |
| 1929 | # else |
| 1930 | NOT_AVAIL(Perl_my_htole64,U64) |
| 1931 | # endif |
| 1932 | #endif |
| 1933 | #ifdef PERL_NEED_MY_LETOH64 |
| 1934 | # if U64SIZE == 8 |
| 1935 | LETOH(Perl_my_letoh64,U64) |
| 1936 | # else |
| 1937 | NOT_AVAIL(Perl_my_letoh64,U64) |
| 1938 | # endif |
| 1939 | #endif |
| 1940 | #ifdef PERL_NEED_MY_HTOBE64 |
| 1941 | # if U64SIZE == 8 |
| 1942 | HTOBE(Perl_my_htobe64,U64) |
| 1943 | # else |
| 1944 | NOT_AVAIL(Perl_my_htobe64,U64) |
| 1945 | # endif |
| 1946 | #endif |
| 1947 | #ifdef PERL_NEED_MY_BETOH64 |
| 1948 | # if U64SIZE == 8 |
| 1949 | BETOH(Perl_my_betoh64,U64) |
| 1950 | # else |
| 1951 | NOT_AVAIL(Perl_my_betoh64,U64) |
| 1952 | # endif |
| 1953 | #endif |
| 1954 | |
| 1955 | #ifdef PERL_NEED_MY_HTOLES |
| 1956 | HTOLE(Perl_my_htoles,short) |
| 1957 | #endif |
| 1958 | #ifdef PERL_NEED_MY_LETOHS |
| 1959 | LETOH(Perl_my_letohs,short) |
| 1960 | #endif |
| 1961 | #ifdef PERL_NEED_MY_HTOBES |
| 1962 | HTOBE(Perl_my_htobes,short) |
| 1963 | #endif |
| 1964 | #ifdef PERL_NEED_MY_BETOHS |
| 1965 | BETOH(Perl_my_betohs,short) |
| 1966 | #endif |
| 1967 | |
| 1968 | #ifdef PERL_NEED_MY_HTOLEI |
| 1969 | HTOLE(Perl_my_htolei,int) |
| 1970 | #endif |
| 1971 | #ifdef PERL_NEED_MY_LETOHI |
| 1972 | LETOH(Perl_my_letohi,int) |
| 1973 | #endif |
| 1974 | #ifdef PERL_NEED_MY_HTOBEI |
| 1975 | HTOBE(Perl_my_htobei,int) |
| 1976 | #endif |
| 1977 | #ifdef PERL_NEED_MY_BETOHI |
| 1978 | BETOH(Perl_my_betohi,int) |
| 1979 | #endif |
| 1980 | |
| 1981 | #ifdef PERL_NEED_MY_HTOLEL |
| 1982 | HTOLE(Perl_my_htolel,long) |
| 1983 | #endif |
| 1984 | #ifdef PERL_NEED_MY_LETOHL |
| 1985 | LETOH(Perl_my_letohl,long) |
| 1986 | #endif |
| 1987 | #ifdef PERL_NEED_MY_HTOBEL |
| 1988 | HTOBE(Perl_my_htobel,long) |
| 1989 | #endif |
| 1990 | #ifdef PERL_NEED_MY_BETOHL |
| 1991 | BETOH(Perl_my_betohl,long) |
| 1992 | #endif |
| 1993 | |
| 1994 | void |
| 1995 | Perl_my_swabn(void *ptr, int n) |
| 1996 | { |
| 1997 | register char *s = (char *)ptr; |
| 1998 | register char *e = s + (n-1); |
| 1999 | register char tc; |
| 2000 | |
| 2001 | for (n /= 2; n > 0; s++, e--, n--) { |
| 2002 | tc = *s; |
| 2003 | *s = *e; |
| 2004 | *e = tc; |
| 2005 | } |
| 2006 | } |
| 2007 | |
| 2008 | PerlIO * |
| 2009 | Perl_my_popen_list(pTHX_ char *mode, int n, SV **args) |
| 2010 | { |
| 2011 | #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE) |
| 2012 | int p[2]; |
| 2013 | register I32 This, that; |
| 2014 | register Pid_t pid; |
| 2015 | SV *sv; |
| 2016 | I32 did_pipes = 0; |
| 2017 | int pp[2]; |
| 2018 | |
| 2019 | PERL_FLUSHALL_FOR_CHILD; |
| 2020 | This = (*mode == 'w'); |
| 2021 | that = !This; |
| 2022 | if (PL_tainting) { |
| 2023 | taint_env(); |
| 2024 | taint_proper("Insecure %s%s", "EXEC"); |
| 2025 | } |
| 2026 | if (PerlProc_pipe(p) < 0) |
| 2027 | return Nullfp; |
| 2028 | /* Try for another pipe pair for error return */ |
| 2029 | if (PerlProc_pipe(pp) >= 0) |
| 2030 | did_pipes = 1; |
| 2031 | while ((pid = PerlProc_fork()) < 0) { |
| 2032 | if (errno != EAGAIN) { |
| 2033 | PerlLIO_close(p[This]); |
| 2034 | PerlLIO_close(p[that]); |
| 2035 | if (did_pipes) { |
| 2036 | PerlLIO_close(pp[0]); |
| 2037 | PerlLIO_close(pp[1]); |
| 2038 | } |
| 2039 | return Nullfp; |
| 2040 | } |
| 2041 | sleep(5); |
| 2042 | } |
| 2043 | if (pid == 0) { |
| 2044 | /* Child */ |
| 2045 | #undef THIS |
| 2046 | #undef THAT |
| 2047 | #define THIS that |
| 2048 | #define THAT This |
| 2049 | /* Close parent's end of error status pipe (if any) */ |
| 2050 | if (did_pipes) { |
| 2051 | PerlLIO_close(pp[0]); |
| 2052 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 2053 | /* Close error pipe automatically if exec works */ |
| 2054 | fcntl(pp[1], F_SETFD, FD_CLOEXEC); |
| 2055 | #endif |
| 2056 | } |
| 2057 | /* Now dup our end of _the_ pipe to right position */ |
| 2058 | if (p[THIS] != (*mode == 'r')) { |
| 2059 | PerlLIO_dup2(p[THIS], *mode == 'r'); |
| 2060 | PerlLIO_close(p[THIS]); |
| 2061 | if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */ |
| 2062 | PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */ |
| 2063 | } |
| 2064 | else |
| 2065 | PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */ |
| 2066 | #if !defined(HAS_FCNTL) || !defined(F_SETFD) |
| 2067 | /* No automatic close - do it by hand */ |
| 2068 | # ifndef NOFILE |
| 2069 | # define NOFILE 20 |
| 2070 | # endif |
| 2071 | { |
| 2072 | int fd; |
| 2073 | |
| 2074 | for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) { |
| 2075 | if (fd != pp[1]) |
| 2076 | PerlLIO_close(fd); |
| 2077 | } |
| 2078 | } |
| 2079 | #endif |
| 2080 | do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes); |
| 2081 | PerlProc__exit(1); |
| 2082 | #undef THIS |
| 2083 | #undef THAT |
| 2084 | } |
| 2085 | /* Parent */ |
| 2086 | do_execfree(); /* free any memory malloced by child on fork */ |
| 2087 | if (did_pipes) |
| 2088 | PerlLIO_close(pp[1]); |
| 2089 | /* Keep the lower of the two fd numbers */ |
| 2090 | if (p[that] < p[This]) { |
| 2091 | PerlLIO_dup2(p[This], p[that]); |
| 2092 | PerlLIO_close(p[This]); |
| 2093 | p[This] = p[that]; |
| 2094 | } |
| 2095 | else |
| 2096 | PerlLIO_close(p[that]); /* close child's end of pipe */ |
| 2097 | |
| 2098 | LOCK_FDPID_MUTEX; |
| 2099 | sv = *av_fetch(PL_fdpid,p[This],TRUE); |
| 2100 | UNLOCK_FDPID_MUTEX; |
| 2101 | SvUPGRADE(sv,SVt_IV); |
| 2102 | SvIV_set(sv, pid); |
| 2103 | PL_forkprocess = pid; |
| 2104 | /* If we managed to get status pipe check for exec fail */ |
| 2105 | if (did_pipes && pid > 0) { |
| 2106 | int errkid; |
| 2107 | int n = 0, n1; |
| 2108 | |
| 2109 | while (n < sizeof(int)) { |
| 2110 | n1 = PerlLIO_read(pp[0], |
| 2111 | (void*)(((char*)&errkid)+n), |
| 2112 | (sizeof(int)) - n); |
| 2113 | if (n1 <= 0) |
| 2114 | break; |
| 2115 | n += n1; |
| 2116 | } |
| 2117 | PerlLIO_close(pp[0]); |
| 2118 | did_pipes = 0; |
| 2119 | if (n) { /* Error */ |
| 2120 | int pid2, status; |
| 2121 | PerlLIO_close(p[This]); |
| 2122 | if (n != sizeof(int)) |
| 2123 | Perl_croak(aTHX_ "panic: kid popen errno read"); |
| 2124 | do { |
| 2125 | pid2 = wait4pid(pid, &status, 0); |
| 2126 | } while (pid2 == -1 && errno == EINTR); |
| 2127 | errno = errkid; /* Propagate errno from kid */ |
| 2128 | return Nullfp; |
| 2129 | } |
| 2130 | } |
| 2131 | if (did_pipes) |
| 2132 | PerlLIO_close(pp[0]); |
| 2133 | return PerlIO_fdopen(p[This], mode); |
| 2134 | #else |
| 2135 | Perl_croak(aTHX_ "List form of piped open not implemented"); |
| 2136 | return (PerlIO *) NULL; |
| 2137 | #endif |
| 2138 | } |
| 2139 | |
| 2140 | /* VMS' my_popen() is in VMS.c, same with OS/2. */ |
| 2141 | #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) |
| 2142 | PerlIO * |
| 2143 | Perl_my_popen(pTHX_ const char *cmd, const char *mode) |
| 2144 | { |
| 2145 | int p[2]; |
| 2146 | register I32 This, that; |
| 2147 | register Pid_t pid; |
| 2148 | SV *sv; |
| 2149 | const I32 doexec = !(*cmd == '-' && cmd[1] == '\0'); |
| 2150 | I32 did_pipes = 0; |
| 2151 | int pp[2]; |
| 2152 | |
| 2153 | PERL_FLUSHALL_FOR_CHILD; |
| 2154 | #ifdef OS2 |
| 2155 | if (doexec) { |
| 2156 | return my_syspopen(aTHX_ cmd,mode); |
| 2157 | } |
| 2158 | #endif |
| 2159 | This = (*mode == 'w'); |
| 2160 | that = !This; |
| 2161 | if (doexec && PL_tainting) { |
| 2162 | taint_env(); |
| 2163 | taint_proper("Insecure %s%s", "EXEC"); |
| 2164 | } |
| 2165 | if (PerlProc_pipe(p) < 0) |
| 2166 | return Nullfp; |
| 2167 | if (doexec && PerlProc_pipe(pp) >= 0) |
| 2168 | did_pipes = 1; |
| 2169 | while ((pid = PerlProc_fork()) < 0) { |
| 2170 | if (errno != EAGAIN) { |
| 2171 | PerlLIO_close(p[This]); |
| 2172 | PerlLIO_close(p[that]); |
| 2173 | if (did_pipes) { |
| 2174 | PerlLIO_close(pp[0]); |
| 2175 | PerlLIO_close(pp[1]); |
| 2176 | } |
| 2177 | if (!doexec) |
| 2178 | Perl_croak(aTHX_ "Can't fork"); |
| 2179 | return Nullfp; |
| 2180 | } |
| 2181 | sleep(5); |
| 2182 | } |
| 2183 | if (pid == 0) { |
| 2184 | GV* tmpgv; |
| 2185 | |
| 2186 | #undef THIS |
| 2187 | #undef THAT |
| 2188 | #define THIS that |
| 2189 | #define THAT This |
| 2190 | if (did_pipes) { |
| 2191 | PerlLIO_close(pp[0]); |
| 2192 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 2193 | fcntl(pp[1], F_SETFD, FD_CLOEXEC); |
| 2194 | #endif |
| 2195 | } |
| 2196 | if (p[THIS] != (*mode == 'r')) { |
| 2197 | PerlLIO_dup2(p[THIS], *mode == 'r'); |
| 2198 | PerlLIO_close(p[THIS]); |
| 2199 | if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */ |
| 2200 | PerlLIO_close(p[THAT]); |
| 2201 | } |
| 2202 | else |
| 2203 | PerlLIO_close(p[THAT]); |
| 2204 | #ifndef OS2 |
| 2205 | if (doexec) { |
| 2206 | #if !defined(HAS_FCNTL) || !defined(F_SETFD) |
| 2207 | #ifndef NOFILE |
| 2208 | #define NOFILE 20 |
| 2209 | #endif |
| 2210 | { |
| 2211 | int fd; |
| 2212 | |
| 2213 | for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) |
| 2214 | if (fd != pp[1]) |
| 2215 | PerlLIO_close(fd); |
| 2216 | } |
| 2217 | #endif |
| 2218 | /* may or may not use the shell */ |
| 2219 | do_exec3(cmd, pp[1], did_pipes); |
| 2220 | PerlProc__exit(1); |
| 2221 | } |
| 2222 | #endif /* defined OS2 */ |
| 2223 | if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) { |
| 2224 | SvREADONLY_off(GvSV(tmpgv)); |
| 2225 | sv_setiv(GvSV(tmpgv), PerlProc_getpid()); |
| 2226 | SvREADONLY_on(GvSV(tmpgv)); |
| 2227 | } |
| 2228 | #ifdef THREADS_HAVE_PIDS |
| 2229 | PL_ppid = (IV)getppid(); |
| 2230 | #endif |
| 2231 | PL_forkprocess = 0; |
| 2232 | #ifdef PERL_USES_PL_PIDSTATUS |
| 2233 | hv_clear(PL_pidstatus); /* we have no children */ |
| 2234 | #endif |
| 2235 | return Nullfp; |
| 2236 | #undef THIS |
| 2237 | #undef THAT |
| 2238 | } |
| 2239 | do_execfree(); /* free any memory malloced by child on vfork */ |
| 2240 | if (did_pipes) |
| 2241 | PerlLIO_close(pp[1]); |
| 2242 | if (p[that] < p[This]) { |
| 2243 | PerlLIO_dup2(p[This], p[that]); |
| 2244 | PerlLIO_close(p[This]); |
| 2245 | p[This] = p[that]; |
| 2246 | } |
| 2247 | else |
| 2248 | PerlLIO_close(p[that]); |
| 2249 | |
| 2250 | LOCK_FDPID_MUTEX; |
| 2251 | sv = *av_fetch(PL_fdpid,p[This],TRUE); |
| 2252 | UNLOCK_FDPID_MUTEX; |
| 2253 | SvUPGRADE(sv,SVt_IV); |
| 2254 | SvIV_set(sv, pid); |
| 2255 | PL_forkprocess = pid; |
| 2256 | if (did_pipes && pid > 0) { |
| 2257 | int errkid; |
| 2258 | int n = 0, n1; |
| 2259 | |
| 2260 | while (n < sizeof(int)) { |
| 2261 | n1 = PerlLIO_read(pp[0], |
| 2262 | (void*)(((char*)&errkid)+n), |
| 2263 | (sizeof(int)) - n); |
| 2264 | if (n1 <= 0) |
| 2265 | break; |
| 2266 | n += n1; |
| 2267 | } |
| 2268 | PerlLIO_close(pp[0]); |
| 2269 | did_pipes = 0; |
| 2270 | if (n) { /* Error */ |
| 2271 | int pid2, status; |
| 2272 | PerlLIO_close(p[This]); |
| 2273 | if (n != sizeof(int)) |
| 2274 | Perl_croak(aTHX_ "panic: kid popen errno read"); |
| 2275 | do { |
| 2276 | pid2 = wait4pid(pid, &status, 0); |
| 2277 | } while (pid2 == -1 && errno == EINTR); |
| 2278 | errno = errkid; /* Propagate errno from kid */ |
| 2279 | return Nullfp; |
| 2280 | } |
| 2281 | } |
| 2282 | if (did_pipes) |
| 2283 | PerlLIO_close(pp[0]); |
| 2284 | return PerlIO_fdopen(p[This], mode); |
| 2285 | } |
| 2286 | #else |
| 2287 | #if defined(atarist) || defined(EPOC) |
| 2288 | FILE *popen(); |
| 2289 | PerlIO * |
| 2290 | Perl_my_popen(pTHX_ char *cmd, char *mode) |
| 2291 | { |
| 2292 | PERL_FLUSHALL_FOR_CHILD; |
| 2293 | /* Call system's popen() to get a FILE *, then import it. |
| 2294 | used 0 for 2nd parameter to PerlIO_importFILE; |
| 2295 | apparently not used |
| 2296 | */ |
| 2297 | return PerlIO_importFILE(popen(cmd, mode), 0); |
| 2298 | } |
| 2299 | #else |
| 2300 | #if defined(DJGPP) |
| 2301 | FILE *djgpp_popen(); |
| 2302 | PerlIO * |
| 2303 | Perl_my_popen(pTHX_ char *cmd, char *mode) |
| 2304 | { |
| 2305 | PERL_FLUSHALL_FOR_CHILD; |
| 2306 | /* Call system's popen() to get a FILE *, then import it. |
| 2307 | used 0 for 2nd parameter to PerlIO_importFILE; |
| 2308 | apparently not used |
| 2309 | */ |
| 2310 | return PerlIO_importFILE(djgpp_popen(cmd, mode), 0); |
| 2311 | } |
| 2312 | #endif |
| 2313 | #endif |
| 2314 | |
| 2315 | #endif /* !DOSISH */ |
| 2316 | |
| 2317 | /* this is called in parent before the fork() */ |
| 2318 | void |
| 2319 | Perl_atfork_lock(void) |
| 2320 | { |
| 2321 | dVAR; |
| 2322 | #if defined(USE_ITHREADS) |
| 2323 | /* locks must be held in locking order (if any) */ |
| 2324 | # ifdef MYMALLOC |
| 2325 | MUTEX_LOCK(&PL_malloc_mutex); |
| 2326 | # endif |
| 2327 | OP_REFCNT_LOCK; |
| 2328 | #endif |
| 2329 | } |
| 2330 | |
| 2331 | /* this is called in both parent and child after the fork() */ |
| 2332 | void |
| 2333 | Perl_atfork_unlock(void) |
| 2334 | { |
| 2335 | dVAR; |
| 2336 | #if defined(USE_ITHREADS) |
| 2337 | /* locks must be released in same order as in atfork_lock() */ |
| 2338 | # ifdef MYMALLOC |
| 2339 | MUTEX_UNLOCK(&PL_malloc_mutex); |
| 2340 | # endif |
| 2341 | OP_REFCNT_UNLOCK; |
| 2342 | #endif |
| 2343 | } |
| 2344 | |
| 2345 | Pid_t |
| 2346 | Perl_my_fork(void) |
| 2347 | { |
| 2348 | #if defined(HAS_FORK) |
| 2349 | Pid_t pid; |
| 2350 | #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK) |
| 2351 | atfork_lock(); |
| 2352 | pid = fork(); |
| 2353 | atfork_unlock(); |
| 2354 | #else |
| 2355 | /* atfork_lock() and atfork_unlock() are installed as pthread_atfork() |
| 2356 | * handlers elsewhere in the code */ |
| 2357 | pid = fork(); |
| 2358 | #endif |
| 2359 | return pid; |
| 2360 | #else |
| 2361 | /* this "canna happen" since nothing should be calling here if !HAS_FORK */ |
| 2362 | Perl_croak_nocontext("fork() not available"); |
| 2363 | return 0; |
| 2364 | #endif /* HAS_FORK */ |
| 2365 | } |
| 2366 | |
| 2367 | #ifdef DUMP_FDS |
| 2368 | void |
| 2369 | Perl_dump_fds(pTHX_ char *s) |
| 2370 | { |
| 2371 | int fd; |
| 2372 | Stat_t tmpstatbuf; |
| 2373 | |
| 2374 | PerlIO_printf(Perl_debug_log,"%s", s); |
| 2375 | for (fd = 0; fd < 32; fd++) { |
| 2376 | if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0) |
| 2377 | PerlIO_printf(Perl_debug_log," %d",fd); |
| 2378 | } |
| 2379 | PerlIO_printf(Perl_debug_log,"\n"); |
| 2380 | return; |
| 2381 | } |
| 2382 | #endif /* DUMP_FDS */ |
| 2383 | |
| 2384 | #ifndef HAS_DUP2 |
| 2385 | int |
| 2386 | dup2(int oldfd, int newfd) |
| 2387 | { |
| 2388 | #if defined(HAS_FCNTL) && defined(F_DUPFD) |
| 2389 | if (oldfd == newfd) |
| 2390 | return oldfd; |
| 2391 | PerlLIO_close(newfd); |
| 2392 | return fcntl(oldfd, F_DUPFD, newfd); |
| 2393 | #else |
| 2394 | #define DUP2_MAX_FDS 256 |
| 2395 | int fdtmp[DUP2_MAX_FDS]; |
| 2396 | I32 fdx = 0; |
| 2397 | int fd; |
| 2398 | |
| 2399 | if (oldfd == newfd) |
| 2400 | return oldfd; |
| 2401 | PerlLIO_close(newfd); |
| 2402 | /* good enough for low fd's... */ |
| 2403 | while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) { |
| 2404 | if (fdx >= DUP2_MAX_FDS) { |
| 2405 | PerlLIO_close(fd); |
| 2406 | fd = -1; |
| 2407 | break; |
| 2408 | } |
| 2409 | fdtmp[fdx++] = fd; |
| 2410 | } |
| 2411 | while (fdx > 0) |
| 2412 | PerlLIO_close(fdtmp[--fdx]); |
| 2413 | return fd; |
| 2414 | #endif |
| 2415 | } |
| 2416 | #endif |
| 2417 | |
| 2418 | #ifndef PERL_MICRO |
| 2419 | #ifdef HAS_SIGACTION |
| 2420 | |
| 2421 | #ifdef MACOS_TRADITIONAL |
| 2422 | /* We don't want restart behavior on MacOS */ |
| 2423 | #undef SA_RESTART |
| 2424 | #endif |
| 2425 | |
| 2426 | Sighandler_t |
| 2427 | Perl_rsignal(pTHX_ int signo, Sighandler_t handler) |
| 2428 | { |
| 2429 | dVAR; |
| 2430 | struct sigaction act, oact; |
| 2431 | |
| 2432 | #ifdef USE_ITHREADS |
| 2433 | /* only "parent" interpreter can diddle signals */ |
| 2434 | if (PL_curinterp != aTHX) |
| 2435 | return (Sighandler_t) SIG_ERR; |
| 2436 | #endif |
| 2437 | |
| 2438 | act.sa_handler = (void(*)(int))handler; |
| 2439 | sigemptyset(&act.sa_mask); |
| 2440 | act.sa_flags = 0; |
| 2441 | #ifdef SA_RESTART |
| 2442 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) |
| 2443 | act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ |
| 2444 | #endif |
| 2445 | #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */ |
| 2446 | if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN) |
| 2447 | act.sa_flags |= SA_NOCLDWAIT; |
| 2448 | #endif |
| 2449 | if (sigaction(signo, &act, &oact) == -1) |
| 2450 | return (Sighandler_t) SIG_ERR; |
| 2451 | else |
| 2452 | return (Sighandler_t) oact.sa_handler; |
| 2453 | } |
| 2454 | |
| 2455 | Sighandler_t |
| 2456 | Perl_rsignal_state(pTHX_ int signo) |
| 2457 | { |
| 2458 | struct sigaction oact; |
| 2459 | |
| 2460 | if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1) |
| 2461 | return (Sighandler_t) SIG_ERR; |
| 2462 | else |
| 2463 | return (Sighandler_t) oact.sa_handler; |
| 2464 | } |
| 2465 | |
| 2466 | int |
| 2467 | Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save) |
| 2468 | { |
| 2469 | dVAR; |
| 2470 | struct sigaction act; |
| 2471 | |
| 2472 | #ifdef USE_ITHREADS |
| 2473 | /* only "parent" interpreter can diddle signals */ |
| 2474 | if (PL_curinterp != aTHX) |
| 2475 | return -1; |
| 2476 | #endif |
| 2477 | |
| 2478 | act.sa_handler = (void(*)(int))handler; |
| 2479 | sigemptyset(&act.sa_mask); |
| 2480 | act.sa_flags = 0; |
| 2481 | #ifdef SA_RESTART |
| 2482 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) |
| 2483 | act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ |
| 2484 | #endif |
| 2485 | #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */ |
| 2486 | if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN) |
| 2487 | act.sa_flags |= SA_NOCLDWAIT; |
| 2488 | #endif |
| 2489 | return sigaction(signo, &act, save); |
| 2490 | } |
| 2491 | |
| 2492 | int |
| 2493 | Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) |
| 2494 | { |
| 2495 | dVAR; |
| 2496 | #ifdef USE_ITHREADS |
| 2497 | /* only "parent" interpreter can diddle signals */ |
| 2498 | if (PL_curinterp != aTHX) |
| 2499 | return -1; |
| 2500 | #endif |
| 2501 | |
| 2502 | return sigaction(signo, save, (struct sigaction *)NULL); |
| 2503 | } |
| 2504 | |
| 2505 | #else /* !HAS_SIGACTION */ |
| 2506 | |
| 2507 | Sighandler_t |
| 2508 | Perl_rsignal(pTHX_ int signo, Sighandler_t handler) |
| 2509 | { |
| 2510 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2511 | /* only "parent" interpreter can diddle signals */ |
| 2512 | if (PL_curinterp != aTHX) |
| 2513 | return (Sighandler_t) SIG_ERR; |
| 2514 | #endif |
| 2515 | |
| 2516 | return PerlProc_signal(signo, handler); |
| 2517 | } |
| 2518 | |
| 2519 | static |
| 2520 | Signal_t |
| 2521 | sig_trap(int signo) |
| 2522 | { |
| 2523 | dVAR; |
| 2524 | PL_sig_trapped++; |
| 2525 | } |
| 2526 | |
| 2527 | Sighandler_t |
| 2528 | Perl_rsignal_state(pTHX_ int signo) |
| 2529 | { |
| 2530 | dVAR; |
| 2531 | Sighandler_t oldsig; |
| 2532 | |
| 2533 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2534 | /* only "parent" interpreter can diddle signals */ |
| 2535 | if (PL_curinterp != aTHX) |
| 2536 | return (Sighandler_t) SIG_ERR; |
| 2537 | #endif |
| 2538 | |
| 2539 | PL_sig_trapped = 0; |
| 2540 | oldsig = PerlProc_signal(signo, sig_trap); |
| 2541 | PerlProc_signal(signo, oldsig); |
| 2542 | if (PL_sig_trapped) |
| 2543 | PerlProc_kill(PerlProc_getpid(), signo); |
| 2544 | return oldsig; |
| 2545 | } |
| 2546 | |
| 2547 | int |
| 2548 | Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save) |
| 2549 | { |
| 2550 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2551 | /* only "parent" interpreter can diddle signals */ |
| 2552 | if (PL_curinterp != aTHX) |
| 2553 | return -1; |
| 2554 | #endif |
| 2555 | *save = PerlProc_signal(signo, handler); |
| 2556 | return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0; |
| 2557 | } |
| 2558 | |
| 2559 | int |
| 2560 | Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) |
| 2561 | { |
| 2562 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2563 | /* only "parent" interpreter can diddle signals */ |
| 2564 | if (PL_curinterp != aTHX) |
| 2565 | return -1; |
| 2566 | #endif |
| 2567 | return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0; |
| 2568 | } |
| 2569 | |
| 2570 | #endif /* !HAS_SIGACTION */ |
| 2571 | #endif /* !PERL_MICRO */ |
| 2572 | |
| 2573 | /* VMS' my_pclose() is in VMS.c; same with OS/2 */ |
| 2574 | #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) |
| 2575 | I32 |
| 2576 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 2577 | { |
| 2578 | Sigsave_t hstat, istat, qstat; |
| 2579 | int status; |
| 2580 | SV **svp; |
| 2581 | Pid_t pid; |
| 2582 | Pid_t pid2; |
| 2583 | bool close_failed; |
| 2584 | int saved_errno = 0; |
| 2585 | #ifdef WIN32 |
| 2586 | int saved_win32_errno; |
| 2587 | #endif |
| 2588 | |
| 2589 | LOCK_FDPID_MUTEX; |
| 2590 | svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE); |
| 2591 | UNLOCK_FDPID_MUTEX; |
| 2592 | pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1; |
| 2593 | SvREFCNT_dec(*svp); |
| 2594 | *svp = &PL_sv_undef; |
| 2595 | #ifdef OS2 |
| 2596 | if (pid == -1) { /* Opened by popen. */ |
| 2597 | return my_syspclose(ptr); |
| 2598 | } |
| 2599 | #endif |
| 2600 | if ((close_failed = (PerlIO_close(ptr) == EOF))) { |
| 2601 | saved_errno = errno; |
| 2602 | #ifdef WIN32 |
| 2603 | saved_win32_errno = GetLastError(); |
| 2604 | #endif |
| 2605 | } |
| 2606 | #ifdef UTS |
| 2607 | if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */ |
| 2608 | #endif |
| 2609 | #ifndef PERL_MICRO |
| 2610 | rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat); |
| 2611 | rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat); |
| 2612 | rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat); |
| 2613 | #endif |
| 2614 | do { |
| 2615 | pid2 = wait4pid(pid, &status, 0); |
| 2616 | } while (pid2 == -1 && errno == EINTR); |
| 2617 | #ifndef PERL_MICRO |
| 2618 | rsignal_restore(SIGHUP, &hstat); |
| 2619 | rsignal_restore(SIGINT, &istat); |
| 2620 | rsignal_restore(SIGQUIT, &qstat); |
| 2621 | #endif |
| 2622 | if (close_failed) { |
| 2623 | SETERRNO(saved_errno, 0); |
| 2624 | return -1; |
| 2625 | } |
| 2626 | return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status)); |
| 2627 | } |
| 2628 | #endif /* !DOSISH */ |
| 2629 | |
| 2630 | #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL) |
| 2631 | I32 |
| 2632 | Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags) |
| 2633 | { |
| 2634 | I32 result = 0; |
| 2635 | if (!pid) |
| 2636 | return -1; |
| 2637 | #ifdef PERL_USES_PL_PIDSTATUS |
| 2638 | { |
| 2639 | if (pid > 0) { |
| 2640 | /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the |
| 2641 | pid, rather than a string form. */ |
| 2642 | SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE); |
| 2643 | if (svp && *svp != &PL_sv_undef) { |
| 2644 | *statusp = SvIVX(*svp); |
| 2645 | (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t), |
| 2646 | G_DISCARD); |
| 2647 | return pid; |
| 2648 | } |
| 2649 | } |
| 2650 | else { |
| 2651 | HE *entry; |
| 2652 | |
| 2653 | hv_iterinit(PL_pidstatus); |
| 2654 | if ((entry = hv_iternext(PL_pidstatus))) { |
| 2655 | SV * const sv = hv_iterval(PL_pidstatus,entry); |
| 2656 | I32 len; |
| 2657 | const char *spid = hv_iterkey(entry,&len); |
| 2658 | |
| 2659 | assert (len == sizeof(Pid_t)); |
| 2660 | memcpy((char *)&pid, spid, len); |
| 2661 | *statusp = SvIVX(sv); |
| 2662 | /* The hash iterator is currently on this entry, so simply |
| 2663 | calling hv_delete would trigger the lazy delete, which on |
| 2664 | aggregate does more work, beacuse next call to hv_iterinit() |
| 2665 | would spot the flag, and have to call the delete routine, |
| 2666 | while in the meantime any new entries can't re-use that |
| 2667 | memory. */ |
| 2668 | hv_iterinit(PL_pidstatus); |
| 2669 | (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD); |
| 2670 | return pid; |
| 2671 | } |
| 2672 | } |
| 2673 | } |
| 2674 | #endif |
| 2675 | #ifdef HAS_WAITPID |
| 2676 | # ifdef HAS_WAITPID_RUNTIME |
| 2677 | if (!HAS_WAITPID_RUNTIME) |
| 2678 | goto hard_way; |
| 2679 | # endif |
| 2680 | result = PerlProc_waitpid(pid,statusp,flags); |
| 2681 | goto finish; |
| 2682 | #endif |
| 2683 | #if !defined(HAS_WAITPID) && defined(HAS_WAIT4) |
| 2684 | result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *)); |
| 2685 | goto finish; |
| 2686 | #endif |
| 2687 | #ifdef PERL_USES_PL_PIDSTATUS |
| 2688 | #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME) |
| 2689 | hard_way: |
| 2690 | #endif |
| 2691 | { |
| 2692 | if (flags) |
| 2693 | Perl_croak(aTHX_ "Can't do waitpid with flags"); |
| 2694 | else { |
| 2695 | while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0) |
| 2696 | pidgone(result,*statusp); |
| 2697 | if (result < 0) |
| 2698 | *statusp = -1; |
| 2699 | } |
| 2700 | } |
| 2701 | #endif |
| 2702 | #if defined(HAS_WAITPID) || defined(HAS_WAIT4) |
| 2703 | finish: |
| 2704 | #endif |
| 2705 | if (result < 0 && errno == EINTR) { |
| 2706 | PERL_ASYNC_CHECK(); |
| 2707 | } |
| 2708 | return result; |
| 2709 | } |
| 2710 | #endif /* !DOSISH || OS2 || WIN32 || NETWARE */ |
| 2711 | |
| 2712 | #ifdef PERL_USES_PL_PIDSTATUS |
| 2713 | void |
| 2714 | Perl_pidgone(pTHX_ Pid_t pid, int status) |
| 2715 | { |
| 2716 | register SV *sv; |
| 2717 | |
| 2718 | sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE); |
| 2719 | SvUPGRADE(sv,SVt_IV); |
| 2720 | SvIV_set(sv, status); |
| 2721 | return; |
| 2722 | } |
| 2723 | #endif |
| 2724 | |
| 2725 | #if defined(atarist) || defined(OS2) || defined(EPOC) |
| 2726 | int pclose(); |
| 2727 | #ifdef HAS_FORK |
| 2728 | int /* Cannot prototype with I32 |
| 2729 | in os2ish.h. */ |
| 2730 | my_syspclose(PerlIO *ptr) |
| 2731 | #else |
| 2732 | I32 |
| 2733 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 2734 | #endif |
| 2735 | { |
| 2736 | /* Needs work for PerlIO ! */ |
| 2737 | FILE * const f = PerlIO_findFILE(ptr); |
| 2738 | const I32 result = pclose(f); |
| 2739 | PerlIO_releaseFILE(ptr,f); |
| 2740 | return result; |
| 2741 | } |
| 2742 | #endif |
| 2743 | |
| 2744 | #if defined(DJGPP) |
| 2745 | int djgpp_pclose(); |
| 2746 | I32 |
| 2747 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 2748 | { |
| 2749 | /* Needs work for PerlIO ! */ |
| 2750 | FILE * const f = PerlIO_findFILE(ptr); |
| 2751 | I32 result = djgpp_pclose(f); |
| 2752 | result = (result << 8) & 0xff00; |
| 2753 | PerlIO_releaseFILE(ptr,f); |
| 2754 | return result; |
| 2755 | } |
| 2756 | #endif |
| 2757 | |
| 2758 | void |
| 2759 | Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count) |
| 2760 | { |
| 2761 | register I32 todo; |
| 2762 | register const char * const frombase = from; |
| 2763 | |
| 2764 | if (len == 1) { |
| 2765 | register const char c = *from; |
| 2766 | while (count-- > 0) |
| 2767 | *to++ = c; |
| 2768 | return; |
| 2769 | } |
| 2770 | while (count-- > 0) { |
| 2771 | for (todo = len; todo > 0; todo--) { |
| 2772 | *to++ = *from++; |
| 2773 | } |
| 2774 | from = frombase; |
| 2775 | } |
| 2776 | } |
| 2777 | |
| 2778 | #ifndef HAS_RENAME |
| 2779 | I32 |
| 2780 | Perl_same_dirent(pTHX_ const char *a, const char *b) |
| 2781 | { |
| 2782 | char *fa = strrchr(a,'/'); |
| 2783 | char *fb = strrchr(b,'/'); |
| 2784 | Stat_t tmpstatbuf1; |
| 2785 | Stat_t tmpstatbuf2; |
| 2786 | SV * const tmpsv = sv_newmortal(); |
| 2787 | |
| 2788 | if (fa) |
| 2789 | fa++; |
| 2790 | else |
| 2791 | fa = a; |
| 2792 | if (fb) |
| 2793 | fb++; |
| 2794 | else |
| 2795 | fb = b; |
| 2796 | if (strNE(a,b)) |
| 2797 | return FALSE; |
| 2798 | if (fa == a) |
| 2799 | sv_setpvn(tmpsv, ".", 1); |
| 2800 | else |
| 2801 | sv_setpvn(tmpsv, a, fa - a); |
| 2802 | if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0) |
| 2803 | return FALSE; |
| 2804 | if (fb == b) |
| 2805 | sv_setpvn(tmpsv, ".", 1); |
| 2806 | else |
| 2807 | sv_setpvn(tmpsv, b, fb - b); |
| 2808 | if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0) |
| 2809 | return FALSE; |
| 2810 | return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev && |
| 2811 | tmpstatbuf1.st_ino == tmpstatbuf2.st_ino; |
| 2812 | } |
| 2813 | #endif /* !HAS_RENAME */ |
| 2814 | |
| 2815 | char* |
| 2816 | Perl_find_script(pTHX_ const char *scriptname, bool dosearch, |
| 2817 | const char *const *const search_ext, I32 flags) |
| 2818 | { |
| 2819 | const char *xfound = Nullch; |
| 2820 | char *xfailed = Nullch; |
| 2821 | char tmpbuf[MAXPATHLEN]; |
| 2822 | register char *s; |
| 2823 | I32 len = 0; |
| 2824 | int retval; |
| 2825 | #if defined(DOSISH) && !defined(OS2) && !defined(atarist) |
| 2826 | # define SEARCH_EXTS ".bat", ".cmd", NULL |
| 2827 | # define MAX_EXT_LEN 4 |
| 2828 | #endif |
| 2829 | #ifdef OS2 |
| 2830 | # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL |
| 2831 | # define MAX_EXT_LEN 4 |
| 2832 | #endif |
| 2833 | #ifdef VMS |
| 2834 | # define SEARCH_EXTS ".pl", ".com", NULL |
| 2835 | # define MAX_EXT_LEN 4 |
| 2836 | #endif |
| 2837 | /* additional extensions to try in each dir if scriptname not found */ |
| 2838 | #ifdef SEARCH_EXTS |
| 2839 | const char *const exts[] = { SEARCH_EXTS }; |
| 2840 | const char *const *const ext = search_ext ? search_ext : exts; |
| 2841 | int extidx = 0, i = 0; |
| 2842 | const char *curext = Nullch; |
| 2843 | #else |
| 2844 | PERL_UNUSED_ARG(search_ext); |
| 2845 | # define MAX_EXT_LEN 0 |
| 2846 | #endif |
| 2847 | |
| 2848 | /* |
| 2849 | * If dosearch is true and if scriptname does not contain path |
| 2850 | * delimiters, search the PATH for scriptname. |
| 2851 | * |
| 2852 | * If SEARCH_EXTS is also defined, will look for each |
| 2853 | * scriptname{SEARCH_EXTS} whenever scriptname is not found |
| 2854 | * while searching the PATH. |
| 2855 | * |
| 2856 | * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search |
| 2857 | * proceeds as follows: |
| 2858 | * If DOSISH or VMSISH: |
| 2859 | * + look for ./scriptname{,.foo,.bar} |
| 2860 | * + search the PATH for scriptname{,.foo,.bar} |
| 2861 | * |
| 2862 | * If !DOSISH: |
| 2863 | * + look *only* in the PATH for scriptname{,.foo,.bar} (note |
| 2864 | * this will not look in '.' if it's not in the PATH) |
| 2865 | */ |
| 2866 | tmpbuf[0] = '\0'; |
| 2867 | |
| 2868 | #ifdef VMS |
| 2869 | # ifdef ALWAYS_DEFTYPES |
| 2870 | len = strlen(scriptname); |
| 2871 | if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') { |
| 2872 | int idx = 0, deftypes = 1; |
| 2873 | bool seen_dot = 1; |
| 2874 | |
| 2875 | const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch); |
| 2876 | # else |
| 2877 | if (dosearch) { |
| 2878 | int idx = 0, deftypes = 1; |
| 2879 | bool seen_dot = 1; |
| 2880 | |
| 2881 | const int hasdir = (strpbrk(scriptname,":[</") != Nullch); |
| 2882 | # endif |
| 2883 | /* The first time through, just add SEARCH_EXTS to whatever we |
| 2884 | * already have, so we can check for default file types. */ |
| 2885 | while (deftypes || |
| 2886 | (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) ) |
| 2887 | { |
| 2888 | if (deftypes) { |
| 2889 | deftypes = 0; |
| 2890 | *tmpbuf = '\0'; |
| 2891 | } |
| 2892 | if ((strlen(tmpbuf) + strlen(scriptname) |
| 2893 | + MAX_EXT_LEN) >= sizeof tmpbuf) |
| 2894 | continue; /* don't search dir with too-long name */ |
| 2895 | strcat(tmpbuf, scriptname); |
| 2896 | #else /* !VMS */ |
| 2897 | |
| 2898 | #ifdef DOSISH |
| 2899 | if (strEQ(scriptname, "-")) |
| 2900 | dosearch = 0; |
| 2901 | if (dosearch) { /* Look in '.' first. */ |
| 2902 | const char *cur = scriptname; |
| 2903 | #ifdef SEARCH_EXTS |
| 2904 | if ((curext = strrchr(scriptname,'.'))) /* possible current ext */ |
| 2905 | while (ext[i]) |
| 2906 | if (strEQ(ext[i++],curext)) { |
| 2907 | extidx = -1; /* already has an ext */ |
| 2908 | break; |
| 2909 | } |
| 2910 | do { |
| 2911 | #endif |
| 2912 | DEBUG_p(PerlIO_printf(Perl_debug_log, |
| 2913 | "Looking for %s\n",cur)); |
| 2914 | if (PerlLIO_stat(cur,&PL_statbuf) >= 0 |
| 2915 | && !S_ISDIR(PL_statbuf.st_mode)) { |
| 2916 | dosearch = 0; |
| 2917 | scriptname = cur; |
| 2918 | #ifdef SEARCH_EXTS |
| 2919 | break; |
| 2920 | #endif |
| 2921 | } |
| 2922 | #ifdef SEARCH_EXTS |
| 2923 | if (cur == scriptname) { |
| 2924 | len = strlen(scriptname); |
| 2925 | if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf)) |
| 2926 | break; |
| 2927 | /* FIXME? Convert to memcpy */ |
| 2928 | cur = strcpy(tmpbuf, scriptname); |
| 2929 | } |
| 2930 | } while (extidx >= 0 && ext[extidx] /* try an extension? */ |
| 2931 | && strcpy(tmpbuf+len, ext[extidx++])); |
| 2932 | #endif |
| 2933 | } |
| 2934 | #endif |
| 2935 | |
| 2936 | #ifdef MACOS_TRADITIONAL |
| 2937 | if (dosearch && !strchr(scriptname, ':') && |
| 2938 | (s = PerlEnv_getenv("Commands"))) |
| 2939 | #else |
| 2940 | if (dosearch && !strchr(scriptname, '/') |
| 2941 | #ifdef DOSISH |
| 2942 | && !strchr(scriptname, '\\') |
| 2943 | #endif |
| 2944 | && (s = PerlEnv_getenv("PATH"))) |
| 2945 | #endif |
| 2946 | { |
| 2947 | bool seen_dot = 0; |
| 2948 | |
| 2949 | PL_bufend = s + strlen(s); |
| 2950 | while (s < PL_bufend) { |
| 2951 | #ifdef MACOS_TRADITIONAL |
| 2952 | s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend, |
| 2953 | ',', |
| 2954 | &len); |
| 2955 | #else |
| 2956 | #if defined(atarist) || defined(DOSISH) |
| 2957 | for (len = 0; *s |
| 2958 | # ifdef atarist |
| 2959 | && *s != ',' |
| 2960 | # endif |
| 2961 | && *s != ';'; len++, s++) { |
| 2962 | if (len < sizeof tmpbuf) |
| 2963 | tmpbuf[len] = *s; |
| 2964 | } |
| 2965 | if (len < sizeof tmpbuf) |
| 2966 | tmpbuf[len] = '\0'; |
| 2967 | #else /* ! (atarist || DOSISH) */ |
| 2968 | s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend, |
| 2969 | ':', |
| 2970 | &len); |
| 2971 | #endif /* ! (atarist || DOSISH) */ |
| 2972 | #endif /* MACOS_TRADITIONAL */ |
| 2973 | if (s < PL_bufend) |
| 2974 | s++; |
| 2975 | if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf) |
| 2976 | continue; /* don't search dir with too-long name */ |
| 2977 | #ifdef MACOS_TRADITIONAL |
| 2978 | if (len && tmpbuf[len - 1] != ':') |
| 2979 | tmpbuf[len++] = ':'; |
| 2980 | #else |
| 2981 | if (len |
| 2982 | # if defined(atarist) || defined(__MINT__) || defined(DOSISH) |
| 2983 | && tmpbuf[len - 1] != '/' |
| 2984 | && tmpbuf[len - 1] != '\\' |
| 2985 | # endif |
| 2986 | ) |
| 2987 | tmpbuf[len++] = '/'; |
| 2988 | if (len == 2 && tmpbuf[0] == '.') |
| 2989 | seen_dot = 1; |
| 2990 | #endif |
| 2991 | /* FIXME? Convert to memcpy by storing previous strlen(scriptname) |
| 2992 | */ |
| 2993 | (void)strcpy(tmpbuf + len, scriptname); |
| 2994 | #endif /* !VMS */ |
| 2995 | |
| 2996 | #ifdef SEARCH_EXTS |
| 2997 | len = strlen(tmpbuf); |
| 2998 | if (extidx > 0) /* reset after previous loop */ |
| 2999 | extidx = 0; |
| 3000 | do { |
| 3001 | #endif |
| 3002 | DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf)); |
| 3003 | retval = PerlLIO_stat(tmpbuf,&PL_statbuf); |
| 3004 | if (S_ISDIR(PL_statbuf.st_mode)) { |
| 3005 | retval = -1; |
| 3006 | } |
| 3007 | #ifdef SEARCH_EXTS |
| 3008 | } while ( retval < 0 /* not there */ |
| 3009 | && extidx>=0 && ext[extidx] /* try an extension? */ |
| 3010 | && strcpy(tmpbuf+len, ext[extidx++]) |
| 3011 | ); |
| 3012 | #endif |
| 3013 | if (retval < 0) |
| 3014 | continue; |
| 3015 | if (S_ISREG(PL_statbuf.st_mode) |
| 3016 | && cando(S_IRUSR,TRUE,&PL_statbuf) |
| 3017 | #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL) |
| 3018 | && cando(S_IXUSR,TRUE,&PL_statbuf) |
| 3019 | #endif |
| 3020 | ) |
| 3021 | { |
| 3022 | xfound = tmpbuf; /* bingo! */ |
| 3023 | break; |
| 3024 | } |
| 3025 | if (!xfailed) |
| 3026 | xfailed = savepv(tmpbuf); |
| 3027 | } |
| 3028 | #ifndef DOSISH |
| 3029 | if (!xfound && !seen_dot && !xfailed && |
| 3030 | (PerlLIO_stat(scriptname,&PL_statbuf) < 0 |
| 3031 | || S_ISDIR(PL_statbuf.st_mode))) |
| 3032 | #endif |
| 3033 | seen_dot = 1; /* Disable message. */ |
| 3034 | if (!xfound) { |
| 3035 | if (flags & 1) { /* do or die? */ |
| 3036 | Perl_croak(aTHX_ "Can't %s %s%s%s", |
| 3037 | (xfailed ? "execute" : "find"), |
| 3038 | (xfailed ? xfailed : scriptname), |
| 3039 | (xfailed ? "" : " on PATH"), |
| 3040 | (xfailed || seen_dot) ? "" : ", '.' not in PATH"); |
| 3041 | } |
| 3042 | scriptname = Nullch; |
| 3043 | } |
| 3044 | Safefree(xfailed); |
| 3045 | scriptname = xfound; |
| 3046 | } |
| 3047 | return (scriptname ? savepv(scriptname) : Nullch); |
| 3048 | } |
| 3049 | |
| 3050 | #ifndef PERL_GET_CONTEXT_DEFINED |
| 3051 | |
| 3052 | void * |
| 3053 | Perl_get_context(void) |
| 3054 | { |
| 3055 | dVAR; |
| 3056 | #if defined(USE_ITHREADS) |
| 3057 | # ifdef OLD_PTHREADS_API |
| 3058 | pthread_addr_t t; |
| 3059 | if (pthread_getspecific(PL_thr_key, &t)) |
| 3060 | Perl_croak_nocontext("panic: pthread_getspecific"); |
| 3061 | return (void*)t; |
| 3062 | # else |
| 3063 | # ifdef I_MACH_CTHREADS |
| 3064 | return (void*)cthread_data(cthread_self()); |
| 3065 | # else |
| 3066 | return (void*)PTHREAD_GETSPECIFIC(PL_thr_key); |
| 3067 | # endif |
| 3068 | # endif |
| 3069 | #else |
| 3070 | return (void*)NULL; |
| 3071 | #endif |
| 3072 | } |
| 3073 | |
| 3074 | void |
| 3075 | Perl_set_context(void *t) |
| 3076 | { |
| 3077 | dVAR; |
| 3078 | #if defined(USE_ITHREADS) |
| 3079 | # ifdef I_MACH_CTHREADS |
| 3080 | cthread_set_data(cthread_self(), t); |
| 3081 | # else |
| 3082 | if (pthread_setspecific(PL_thr_key, t)) |
| 3083 | Perl_croak_nocontext("panic: pthread_setspecific"); |
| 3084 | # endif |
| 3085 | #else |
| 3086 | PERL_UNUSED_ARG(t); |
| 3087 | #endif |
| 3088 | } |
| 3089 | |
| 3090 | #endif /* !PERL_GET_CONTEXT_DEFINED */ |
| 3091 | |
| 3092 | #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE) |
| 3093 | struct perl_vars * |
| 3094 | Perl_GetVars(pTHX) |
| 3095 | { |
| 3096 | return &PL_Vars; |
| 3097 | } |
| 3098 | #endif |
| 3099 | |
| 3100 | char ** |
| 3101 | Perl_get_op_names(pTHX) |
| 3102 | { |
| 3103 | return (char **)PL_op_name; |
| 3104 | } |
| 3105 | |
| 3106 | char ** |
| 3107 | Perl_get_op_descs(pTHX) |
| 3108 | { |
| 3109 | return (char **)PL_op_desc; |
| 3110 | } |
| 3111 | |
| 3112 | const char * |
| 3113 | Perl_get_no_modify(pTHX) |
| 3114 | { |
| 3115 | return PL_no_modify; |
| 3116 | } |
| 3117 | |
| 3118 | U32 * |
| 3119 | Perl_get_opargs(pTHX) |
| 3120 | { |
| 3121 | return (U32 *)PL_opargs; |
| 3122 | } |
| 3123 | |
| 3124 | PPADDR_t* |
| 3125 | Perl_get_ppaddr(pTHX) |
| 3126 | { |
| 3127 | dVAR; |
| 3128 | return (PPADDR_t*)PL_ppaddr; |
| 3129 | } |
| 3130 | |
| 3131 | #ifndef HAS_GETENV_LEN |
| 3132 | char * |
| 3133 | Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len) |
| 3134 | { |
| 3135 | char * const env_trans = PerlEnv_getenv(env_elem); |
| 3136 | if (env_trans) |
| 3137 | *len = strlen(env_trans); |
| 3138 | return env_trans; |
| 3139 | } |
| 3140 | #endif |
| 3141 | |
| 3142 | |
| 3143 | MGVTBL* |
| 3144 | Perl_get_vtbl(pTHX_ int vtbl_id) |
| 3145 | { |
| 3146 | const MGVTBL* result; |
| 3147 | |
| 3148 | switch(vtbl_id) { |
| 3149 | case want_vtbl_sv: |
| 3150 | result = &PL_vtbl_sv; |
| 3151 | break; |
| 3152 | case want_vtbl_env: |
| 3153 | result = &PL_vtbl_env; |
| 3154 | break; |
| 3155 | case want_vtbl_envelem: |
| 3156 | result = &PL_vtbl_envelem; |
| 3157 | break; |
| 3158 | case want_vtbl_sig: |
| 3159 | result = &PL_vtbl_sig; |
| 3160 | break; |
| 3161 | case want_vtbl_sigelem: |
| 3162 | result = &PL_vtbl_sigelem; |
| 3163 | break; |
| 3164 | case want_vtbl_pack: |
| 3165 | result = &PL_vtbl_pack; |
| 3166 | break; |
| 3167 | case want_vtbl_packelem: |
| 3168 | result = &PL_vtbl_packelem; |
| 3169 | break; |
| 3170 | case want_vtbl_dbline: |
| 3171 | result = &PL_vtbl_dbline; |
| 3172 | break; |
| 3173 | case want_vtbl_isa: |
| 3174 | result = &PL_vtbl_isa; |
| 3175 | break; |
| 3176 | case want_vtbl_isaelem: |
| 3177 | result = &PL_vtbl_isaelem; |
| 3178 | break; |
| 3179 | case want_vtbl_arylen: |
| 3180 | result = &PL_vtbl_arylen; |
| 3181 | break; |
| 3182 | case want_vtbl_glob: |
| 3183 | result = &PL_vtbl_glob; |
| 3184 | break; |
| 3185 | case want_vtbl_mglob: |
| 3186 | result = &PL_vtbl_mglob; |
| 3187 | break; |
| 3188 | case want_vtbl_nkeys: |
| 3189 | result = &PL_vtbl_nkeys; |
| 3190 | break; |
| 3191 | case want_vtbl_taint: |
| 3192 | result = &PL_vtbl_taint; |
| 3193 | break; |
| 3194 | case want_vtbl_substr: |
| 3195 | result = &PL_vtbl_substr; |
| 3196 | break; |
| 3197 | case want_vtbl_vec: |
| 3198 | result = &PL_vtbl_vec; |
| 3199 | break; |
| 3200 | case want_vtbl_pos: |
| 3201 | result = &PL_vtbl_pos; |
| 3202 | break; |
| 3203 | case want_vtbl_bm: |
| 3204 | result = &PL_vtbl_bm; |
| 3205 | break; |
| 3206 | case want_vtbl_fm: |
| 3207 | result = &PL_vtbl_fm; |
| 3208 | break; |
| 3209 | case want_vtbl_uvar: |
| 3210 | result = &PL_vtbl_uvar; |
| 3211 | break; |
| 3212 | case want_vtbl_defelem: |
| 3213 | result = &PL_vtbl_defelem; |
| 3214 | break; |
| 3215 | case want_vtbl_regexp: |
| 3216 | result = &PL_vtbl_regexp; |
| 3217 | break; |
| 3218 | case want_vtbl_regdata: |
| 3219 | result = &PL_vtbl_regdata; |
| 3220 | break; |
| 3221 | case want_vtbl_regdatum: |
| 3222 | result = &PL_vtbl_regdatum; |
| 3223 | break; |
| 3224 | #ifdef USE_LOCALE_COLLATE |
| 3225 | case want_vtbl_collxfrm: |
| 3226 | result = &PL_vtbl_collxfrm; |
| 3227 | break; |
| 3228 | #endif |
| 3229 | case want_vtbl_amagic: |
| 3230 | result = &PL_vtbl_amagic; |
| 3231 | break; |
| 3232 | case want_vtbl_amagicelem: |
| 3233 | result = &PL_vtbl_amagicelem; |
| 3234 | break; |
| 3235 | case want_vtbl_backref: |
| 3236 | result = &PL_vtbl_backref; |
| 3237 | break; |
| 3238 | case want_vtbl_utf8: |
| 3239 | result = &PL_vtbl_utf8; |
| 3240 | break; |
| 3241 | default: |
| 3242 | result = Null(MGVTBL*); |
| 3243 | break; |
| 3244 | } |
| 3245 | return (MGVTBL*)result; |
| 3246 | } |
| 3247 | |
| 3248 | I32 |
| 3249 | Perl_my_fflush_all(pTHX) |
| 3250 | { |
| 3251 | #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO) |
| 3252 | return PerlIO_flush(NULL); |
| 3253 | #else |
| 3254 | # if defined(HAS__FWALK) |
| 3255 | extern int fflush(FILE *); |
| 3256 | /* undocumented, unprototyped, but very useful BSDism */ |
| 3257 | extern void _fwalk(int (*)(FILE *)); |
| 3258 | _fwalk(&fflush); |
| 3259 | return 0; |
| 3260 | # else |
| 3261 | # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY) |
| 3262 | long open_max = -1; |
| 3263 | # ifdef PERL_FFLUSH_ALL_FOPEN_MAX |
| 3264 | open_max = PERL_FFLUSH_ALL_FOPEN_MAX; |
| 3265 | # else |
| 3266 | # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX) |
| 3267 | open_max = sysconf(_SC_OPEN_MAX); |
| 3268 | # else |
| 3269 | # ifdef FOPEN_MAX |
| 3270 | open_max = FOPEN_MAX; |
| 3271 | # else |
| 3272 | # ifdef OPEN_MAX |
| 3273 | open_max = OPEN_MAX; |
| 3274 | # else |
| 3275 | # ifdef _NFILE |
| 3276 | open_max = _NFILE; |
| 3277 | # endif |
| 3278 | # endif |
| 3279 | # endif |
| 3280 | # endif |
| 3281 | # endif |
| 3282 | if (open_max > 0) { |
| 3283 | long i; |
| 3284 | for (i = 0; i < open_max; i++) |
| 3285 | if (STDIO_STREAM_ARRAY[i]._file >= 0 && |
| 3286 | STDIO_STREAM_ARRAY[i]._file < open_max && |
| 3287 | STDIO_STREAM_ARRAY[i]._flag) |
| 3288 | PerlIO_flush(&STDIO_STREAM_ARRAY[i]); |
| 3289 | return 0; |
| 3290 | } |
| 3291 | # endif |
| 3292 | SETERRNO(EBADF,RMS_IFI); |
| 3293 | return EOF; |
| 3294 | # endif |
| 3295 | #endif |
| 3296 | } |
| 3297 | |
| 3298 | void |
| 3299 | Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op) |
| 3300 | { |
| 3301 | const char * const func = |
| 3302 | op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */ |
| 3303 | op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */ |
| 3304 | PL_op_desc[op]; |
| 3305 | const char * const pars = OP_IS_FILETEST(op) ? "" : "()"; |
| 3306 | const char * const type = OP_IS_SOCKET(op) |
| 3307 | || (gv && io && IoTYPE(io) == IoTYPE_SOCKET) |
| 3308 | ? "socket" : "filehandle"; |
| 3309 | const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL; |
| 3310 | |
| 3311 | if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) { |
| 3312 | if (ckWARN(WARN_IO)) { |
| 3313 | const char * const direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out"; |
| 3314 | if (name && *name) |
| 3315 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 3316 | "Filehandle %s opened only for %sput", |
| 3317 | name, direction); |
| 3318 | else |
| 3319 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 3320 | "Filehandle opened only for %sput", direction); |
| 3321 | } |
| 3322 | } |
| 3323 | else { |
| 3324 | const char *vile; |
| 3325 | I32 warn_type; |
| 3326 | |
| 3327 | if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) { |
| 3328 | vile = "closed"; |
| 3329 | warn_type = WARN_CLOSED; |
| 3330 | } |
| 3331 | else { |
| 3332 | vile = "unopened"; |
| 3333 | warn_type = WARN_UNOPENED; |
| 3334 | } |
| 3335 | |
| 3336 | if (ckWARN(warn_type)) { |
| 3337 | if (name && *name) { |
| 3338 | Perl_warner(aTHX_ packWARN(warn_type), |
| 3339 | "%s%s on %s %s %s", func, pars, vile, type, name); |
| 3340 | if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP)) |
| 3341 | Perl_warner( |
| 3342 | aTHX_ packWARN(warn_type), |
| 3343 | "\t(Are you trying to call %s%s on dirhandle %s?)\n", |
| 3344 | func, pars, name |
| 3345 | ); |
| 3346 | } |
| 3347 | else { |
| 3348 | Perl_warner(aTHX_ packWARN(warn_type), |
| 3349 | "%s%s on %s %s", func, pars, vile, type); |
| 3350 | if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP)) |
| 3351 | Perl_warner( |
| 3352 | aTHX_ packWARN(warn_type), |
| 3353 | "\t(Are you trying to call %s%s on dirhandle?)\n", |
| 3354 | func, pars |
| 3355 | ); |
| 3356 | } |
| 3357 | } |
| 3358 | } |
| 3359 | } |
| 3360 | |
| 3361 | #ifdef EBCDIC |
| 3362 | /* in ASCII order, not that it matters */ |
| 3363 | static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"; |
| 3364 | |
| 3365 | int |
| 3366 | Perl_ebcdic_control(pTHX_ int ch) |
| 3367 | { |
| 3368 | if (ch > 'a') { |
| 3369 | const char *ctlp; |
| 3370 | |
| 3371 | if (islower(ch)) |
| 3372 | ch = toupper(ch); |
| 3373 | |
| 3374 | if ((ctlp = strchr(controllablechars, ch)) == 0) { |
| 3375 | Perl_die(aTHX_ "unrecognised control character '%c'\n", ch); |
| 3376 | } |
| 3377 | |
| 3378 | if (ctlp == controllablechars) |
| 3379 | return('\177'); /* DEL */ |
| 3380 | else |
| 3381 | return((unsigned char)(ctlp - controllablechars - 1)); |
| 3382 | } else { /* Want uncontrol */ |
| 3383 | if (ch == '\177' || ch == -1) |
| 3384 | return('?'); |
| 3385 | else if (ch == '\157') |
| 3386 | return('\177'); |
| 3387 | else if (ch == '\174') |
| 3388 | return('\000'); |
| 3389 | else if (ch == '^') /* '\137' in 1047, '\260' in 819 */ |
| 3390 | return('\036'); |
| 3391 | else if (ch == '\155') |
| 3392 | return('\037'); |
| 3393 | else if (0 < ch && ch < (sizeof(controllablechars) - 1)) |
| 3394 | return(controllablechars[ch+1]); |
| 3395 | else |
| 3396 | Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF); |
| 3397 | } |
| 3398 | } |
| 3399 | #endif |
| 3400 | |
| 3401 | /* To workaround core dumps from the uninitialised tm_zone we get the |
| 3402 | * system to give us a reasonable struct to copy. This fix means that |
| 3403 | * strftime uses the tm_zone and tm_gmtoff values returned by |
| 3404 | * localtime(time()). That should give the desired result most of the |
| 3405 | * time. But probably not always! |
| 3406 | * |
| 3407 | * This does not address tzname aspects of NETaa14816. |
| 3408 | * |
| 3409 | */ |
| 3410 | |
| 3411 | #ifdef HAS_GNULIBC |
| 3412 | # ifndef STRUCT_TM_HASZONE |
| 3413 | # define STRUCT_TM_HASZONE |
| 3414 | # endif |
| 3415 | #endif |
| 3416 | |
| 3417 | #ifdef STRUCT_TM_HASZONE /* Backward compat */ |
| 3418 | # ifndef HAS_TM_TM_ZONE |
| 3419 | # define HAS_TM_TM_ZONE |
| 3420 | # endif |
| 3421 | #endif |
| 3422 | |
| 3423 | void |
| 3424 | Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */ |
| 3425 | { |
| 3426 | #ifdef HAS_TM_TM_ZONE |
| 3427 | Time_t now; |
| 3428 | const struct tm* my_tm; |
| 3429 | (void)time(&now); |
| 3430 | my_tm = localtime(&now); |
| 3431 | if (my_tm) |
| 3432 | Copy(my_tm, ptm, 1, struct tm); |
| 3433 | #else |
| 3434 | PERL_UNUSED_ARG(ptm); |
| 3435 | #endif |
| 3436 | } |
| 3437 | |
| 3438 | /* |
| 3439 | * mini_mktime - normalise struct tm values without the localtime() |
| 3440 | * semantics (and overhead) of mktime(). |
| 3441 | */ |
| 3442 | void |
| 3443 | Perl_mini_mktime(pTHX_ struct tm *ptm) |
| 3444 | { |
| 3445 | int yearday; |
| 3446 | int secs; |
| 3447 | int month, mday, year, jday; |
| 3448 | int odd_cent, odd_year; |
| 3449 | |
| 3450 | #define DAYS_PER_YEAR 365 |
| 3451 | #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1) |
| 3452 | #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1) |
| 3453 | #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1) |
| 3454 | #define SECS_PER_HOUR (60*60) |
| 3455 | #define SECS_PER_DAY (24*SECS_PER_HOUR) |
| 3456 | /* parentheses deliberately absent on these two, otherwise they don't work */ |
| 3457 | #define MONTH_TO_DAYS 153/5 |
| 3458 | #define DAYS_TO_MONTH 5/153 |
| 3459 | /* offset to bias by March (month 4) 1st between month/mday & year finding */ |
| 3460 | #define YEAR_ADJUST (4*MONTH_TO_DAYS+1) |
| 3461 | /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */ |
| 3462 | #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */ |
| 3463 | |
| 3464 | /* |
| 3465 | * Year/day algorithm notes: |
| 3466 | * |
| 3467 | * With a suitable offset for numeric value of the month, one can find |
| 3468 | * an offset into the year by considering months to have 30.6 (153/5) days, |
| 3469 | * using integer arithmetic (i.e., with truncation). To avoid too much |
| 3470 | * messing about with leap days, we consider January and February to be |
| 3471 | * the 13th and 14th month of the previous year. After that transformation, |
| 3472 | * we need the month index we use to be high by 1 from 'normal human' usage, |
| 3473 | * so the month index values we use run from 4 through 15. |
| 3474 | * |
| 3475 | * Given that, and the rules for the Gregorian calendar (leap years are those |
| 3476 | * divisible by 4 unless also divisible by 100, when they must be divisible |
| 3477 | * by 400 instead), we can simply calculate the number of days since some |
| 3478 | * arbitrary 'beginning of time' by futzing with the (adjusted) year number, |
| 3479 | * the days we derive from our month index, and adding in the day of the |
| 3480 | * month. The value used here is not adjusted for the actual origin which |
| 3481 | * it normally would use (1 January A.D. 1), since we're not exposing it. |
| 3482 | * We're only building the value so we can turn around and get the |
| 3483 | * normalised values for the year, month, day-of-month, and day-of-year. |
| 3484 | * |
| 3485 | * For going backward, we need to bias the value we're using so that we find |
| 3486 | * the right year value. (Basically, we don't want the contribution of |
| 3487 | * March 1st to the number to apply while deriving the year). Having done |
| 3488 | * that, we 'count up' the contribution to the year number by accounting for |
| 3489 | * full quadracenturies (400-year periods) with their extra leap days, plus |
| 3490 | * the contribution from full centuries (to avoid counting in the lost leap |
| 3491 | * days), plus the contribution from full quad-years (to count in the normal |
| 3492 | * leap days), plus the leftover contribution from any non-leap years. |
| 3493 | * At this point, if we were working with an actual leap day, we'll have 0 |
| 3494 | * days left over. This is also true for March 1st, however. So, we have |
| 3495 | * to special-case that result, and (earlier) keep track of the 'odd' |
| 3496 | * century and year contributions. If we got 4 extra centuries in a qcent, |
| 3497 | * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb. |
| 3498 | * Otherwise, we add back in the earlier bias we removed (the 123 from |
| 3499 | * figuring in March 1st), find the month index (integer division by 30.6), |
| 3500 | * and the remainder is the day-of-month. We then have to convert back to |
| 3501 | * 'real' months (including fixing January and February from being 14/15 in |
| 3502 | * the previous year to being in the proper year). After that, to get |
| 3503 | * tm_yday, we work with the normalised year and get a new yearday value for |
| 3504 | * January 1st, which we subtract from the yearday value we had earlier, |
| 3505 | * representing the date we've re-built. This is done from January 1 |
| 3506 | * because tm_yday is 0-origin. |
| 3507 | * |
| 3508 | * Since POSIX time routines are only guaranteed to work for times since the |
| 3509 | * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm |
| 3510 | * applies Gregorian calendar rules even to dates before the 16th century |
| 3511 | * doesn't bother me. Besides, you'd need cultural context for a given |
| 3512 | * date to know whether it was Julian or Gregorian calendar, and that's |
| 3513 | * outside the scope for this routine. Since we convert back based on the |
| 3514 | * same rules we used to build the yearday, you'll only get strange results |
| 3515 | * for input which needed normalising, or for the 'odd' century years which |
| 3516 | * were leap years in the Julian calander but not in the Gregorian one. |
| 3517 | * I can live with that. |
| 3518 | * |
| 3519 | * This algorithm also fails to handle years before A.D. 1 gracefully, but |
| 3520 | * that's still outside the scope for POSIX time manipulation, so I don't |
| 3521 | * care. |
| 3522 | */ |
| 3523 | |
| 3524 | year = 1900 + ptm->tm_year; |
| 3525 | month = ptm->tm_mon; |
| 3526 | mday = ptm->tm_mday; |
| 3527 | /* allow given yday with no month & mday to dominate the result */ |
| 3528 | if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) { |
| 3529 | month = 0; |
| 3530 | mday = 0; |
| 3531 | jday = 1 + ptm->tm_yday; |
| 3532 | } |
| 3533 | else { |
| 3534 | jday = 0; |
| 3535 | } |
| 3536 | if (month >= 2) |
| 3537 | month+=2; |
| 3538 | else |
| 3539 | month+=14, year--; |
| 3540 | yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400; |
| 3541 | yearday += month*MONTH_TO_DAYS + mday + jday; |
| 3542 | /* |
| 3543 | * Note that we don't know when leap-seconds were or will be, |
| 3544 | * so we have to trust the user if we get something which looks |
| 3545 | * like a sensible leap-second. Wild values for seconds will |
| 3546 | * be rationalised, however. |
| 3547 | */ |
| 3548 | if ((unsigned) ptm->tm_sec <= 60) { |
| 3549 | secs = 0; |
| 3550 | } |
| 3551 | else { |
| 3552 | secs = ptm->tm_sec; |
| 3553 | ptm->tm_sec = 0; |
| 3554 | } |
| 3555 | secs += 60 * ptm->tm_min; |
| 3556 | secs += SECS_PER_HOUR * ptm->tm_hour; |
| 3557 | if (secs < 0) { |
| 3558 | if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) { |
| 3559 | /* got negative remainder, but need positive time */ |
| 3560 | /* back off an extra day to compensate */ |
| 3561 | yearday += (secs/SECS_PER_DAY)-1; |
| 3562 | secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1); |
| 3563 | } |
| 3564 | else { |
| 3565 | yearday += (secs/SECS_PER_DAY); |
| 3566 | secs -= SECS_PER_DAY * (secs/SECS_PER_DAY); |
| 3567 | } |
| 3568 | } |
| 3569 | else if (secs >= SECS_PER_DAY) { |
| 3570 | yearday += (secs/SECS_PER_DAY); |
| 3571 | secs %= SECS_PER_DAY; |
| 3572 | } |
| 3573 | ptm->tm_hour = secs/SECS_PER_HOUR; |
| 3574 | secs %= SECS_PER_HOUR; |
| 3575 | ptm->tm_min = secs/60; |
| 3576 | secs %= 60; |
| 3577 | ptm->tm_sec += secs; |
| 3578 | /* done with time of day effects */ |
| 3579 | /* |
| 3580 | * The algorithm for yearday has (so far) left it high by 428. |
| 3581 | * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to |
| 3582 | * bias it by 123 while trying to figure out what year it |
| 3583 | * really represents. Even with this tweak, the reverse |
| 3584 | * translation fails for years before A.D. 0001. |
| 3585 | * It would still fail for Feb 29, but we catch that one below. |
| 3586 | */ |
| 3587 | jday = yearday; /* save for later fixup vis-a-vis Jan 1 */ |
| 3588 | yearday -= YEAR_ADJUST; |
| 3589 | year = (yearday / DAYS_PER_QCENT) * 400; |
| 3590 | yearday %= DAYS_PER_QCENT; |
| 3591 | odd_cent = yearday / DAYS_PER_CENT; |
| 3592 | year += odd_cent * 100; |
| 3593 | yearday %= DAYS_PER_CENT; |
| 3594 | year += (yearday / DAYS_PER_QYEAR) * 4; |
| 3595 | yearday %= DAYS_PER_QYEAR; |
| 3596 | odd_year = yearday / DAYS_PER_YEAR; |
| 3597 | year += odd_year; |
| 3598 | yearday %= DAYS_PER_YEAR; |
| 3599 | if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */ |
| 3600 | month = 1; |
| 3601 | yearday = 29; |
| 3602 | } |
| 3603 | else { |
| 3604 | yearday += YEAR_ADJUST; /* recover March 1st crock */ |
| 3605 | month = yearday*DAYS_TO_MONTH; |
| 3606 | yearday -= month*MONTH_TO_DAYS; |
| 3607 | /* recover other leap-year adjustment */ |
| 3608 | if (month > 13) { |
| 3609 | month-=14; |
| 3610 | year++; |
| 3611 | } |
| 3612 | else { |
| 3613 | month-=2; |
| 3614 | } |
| 3615 | } |
| 3616 | ptm->tm_year = year - 1900; |
| 3617 | if (yearday) { |
| 3618 | ptm->tm_mday = yearday; |
| 3619 | ptm->tm_mon = month; |
| 3620 | } |
| 3621 | else { |
| 3622 | ptm->tm_mday = 31; |
| 3623 | ptm->tm_mon = month - 1; |
| 3624 | } |
| 3625 | /* re-build yearday based on Jan 1 to get tm_yday */ |
| 3626 | year--; |
| 3627 | yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400; |
| 3628 | yearday += 14*MONTH_TO_DAYS + 1; |
| 3629 | ptm->tm_yday = jday - yearday; |
| 3630 | /* fix tm_wday if not overridden by caller */ |
| 3631 | if ((unsigned)ptm->tm_wday > 6) |
| 3632 | ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7; |
| 3633 | } |
| 3634 | |
| 3635 | char * |
| 3636 | Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst) |
| 3637 | { |
| 3638 | #ifdef HAS_STRFTIME |
| 3639 | char *buf; |
| 3640 | int buflen; |
| 3641 | struct tm mytm; |
| 3642 | int len; |
| 3643 | |
| 3644 | init_tm(&mytm); /* XXX workaround - see init_tm() above */ |
| 3645 | mytm.tm_sec = sec; |
| 3646 | mytm.tm_min = min; |
| 3647 | mytm.tm_hour = hour; |
| 3648 | mytm.tm_mday = mday; |
| 3649 | mytm.tm_mon = mon; |
| 3650 | mytm.tm_year = year; |
| 3651 | mytm.tm_wday = wday; |
| 3652 | mytm.tm_yday = yday; |
| 3653 | mytm.tm_isdst = isdst; |
| 3654 | mini_mktime(&mytm); |
| 3655 | /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */ |
| 3656 | #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE)) |
| 3657 | STMT_START { |
| 3658 | struct tm mytm2; |
| 3659 | mytm2 = mytm; |
| 3660 | mktime(&mytm2); |
| 3661 | #ifdef HAS_TM_TM_GMTOFF |
| 3662 | mytm.tm_gmtoff = mytm2.tm_gmtoff; |
| 3663 | #endif |
| 3664 | #ifdef HAS_TM_TM_ZONE |
| 3665 | mytm.tm_zone = mytm2.tm_zone; |
| 3666 | #endif |
| 3667 | } STMT_END; |
| 3668 | #endif |
| 3669 | buflen = 64; |
| 3670 | Newx(buf, buflen, char); |
| 3671 | len = strftime(buf, buflen, fmt, &mytm); |
| 3672 | /* |
| 3673 | ** The following is needed to handle to the situation where |
| 3674 | ** tmpbuf overflows. Basically we want to allocate a buffer |
| 3675 | ** and try repeatedly. The reason why it is so complicated |
| 3676 | ** is that getting a return value of 0 from strftime can indicate |
| 3677 | ** one of the following: |
| 3678 | ** 1. buffer overflowed, |
| 3679 | ** 2. illegal conversion specifier, or |
| 3680 | ** 3. the format string specifies nothing to be returned(not |
| 3681 | ** an error). This could be because format is an empty string |
| 3682 | ** or it specifies %p that yields an empty string in some locale. |
| 3683 | ** If there is a better way to make it portable, go ahead by |
| 3684 | ** all means. |
| 3685 | */ |
| 3686 | if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0')) |
| 3687 | return buf; |
| 3688 | else { |
| 3689 | /* Possibly buf overflowed - try again with a bigger buf */ |
| 3690 | const int fmtlen = strlen(fmt); |
| 3691 | const int bufsize = fmtlen + buflen; |
| 3692 | |
| 3693 | Newx(buf, bufsize, char); |
| 3694 | while (buf) { |
| 3695 | buflen = strftime(buf, bufsize, fmt, &mytm); |
| 3696 | if (buflen > 0 && buflen < bufsize) |
| 3697 | break; |
| 3698 | /* heuristic to prevent out-of-memory errors */ |
| 3699 | if (bufsize > 100*fmtlen) { |
| 3700 | Safefree(buf); |
| 3701 | buf = NULL; |
| 3702 | break; |
| 3703 | } |
| 3704 | Renew(buf, bufsize*2, char); |
| 3705 | } |
| 3706 | return buf; |
| 3707 | } |
| 3708 | #else |
| 3709 | Perl_croak(aTHX_ "panic: no strftime"); |
| 3710 | return NULL; |
| 3711 | #endif |
| 3712 | } |
| 3713 | |
| 3714 | |
| 3715 | #define SV_CWD_RETURN_UNDEF \ |
| 3716 | sv_setsv(sv, &PL_sv_undef); \ |
| 3717 | return FALSE |
| 3718 | |
| 3719 | #define SV_CWD_ISDOT(dp) \ |
| 3720 | (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \ |
| 3721 | (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) |
| 3722 | |
| 3723 | /* |
| 3724 | =head1 Miscellaneous Functions |
| 3725 | |
| 3726 | =for apidoc getcwd_sv |
| 3727 | |
| 3728 | Fill the sv with current working directory |
| 3729 | |
| 3730 | =cut |
| 3731 | */ |
| 3732 | |
| 3733 | /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars. |
| 3734 | * rewritten again by dougm, optimized for use with xs TARG, and to prefer |
| 3735 | * getcwd(3) if available |
| 3736 | * Comments from the orignal: |
| 3737 | * This is a faster version of getcwd. It's also more dangerous |
| 3738 | * because you might chdir out of a directory that you can't chdir |
| 3739 | * back into. */ |
| 3740 | |
| 3741 | int |
| 3742 | Perl_getcwd_sv(pTHX_ register SV *sv) |
| 3743 | { |
| 3744 | #ifndef PERL_MICRO |
| 3745 | |
| 3746 | #ifndef INCOMPLETE_TAINTS |
| 3747 | SvTAINTED_on(sv); |
| 3748 | #endif |
| 3749 | |
| 3750 | #ifdef HAS_GETCWD |
| 3751 | { |
| 3752 | char buf[MAXPATHLEN]; |
| 3753 | |
| 3754 | /* Some getcwd()s automatically allocate a buffer of the given |
| 3755 | * size from the heap if they are given a NULL buffer pointer. |
| 3756 | * The problem is that this behaviour is not portable. */ |
| 3757 | if (getcwd(buf, sizeof(buf) - 1)) { |
| 3758 | sv_setpv(sv, buf); |
| 3759 | return TRUE; |
| 3760 | } |
| 3761 | else { |
| 3762 | sv_setsv(sv, &PL_sv_undef); |
| 3763 | return FALSE; |
| 3764 | } |
| 3765 | } |
| 3766 | |
| 3767 | #else |
| 3768 | |
| 3769 | Stat_t statbuf; |
| 3770 | int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino; |
| 3771 | int pathlen=0; |
| 3772 | Direntry_t *dp; |
| 3773 | |
| 3774 | SvUPGRADE(sv, SVt_PV); |
| 3775 | |
| 3776 | if (PerlLIO_lstat(".", &statbuf) < 0) { |
| 3777 | SV_CWD_RETURN_UNDEF; |
| 3778 | } |
| 3779 | |
| 3780 | orig_cdev = statbuf.st_dev; |
| 3781 | orig_cino = statbuf.st_ino; |
| 3782 | cdev = orig_cdev; |
| 3783 | cino = orig_cino; |
| 3784 | |
| 3785 | for (;;) { |
| 3786 | DIR *dir; |
| 3787 | odev = cdev; |
| 3788 | oino = cino; |
| 3789 | |
| 3790 | if (PerlDir_chdir("..") < 0) { |
| 3791 | SV_CWD_RETURN_UNDEF; |
| 3792 | } |
| 3793 | if (PerlLIO_stat(".", &statbuf) < 0) { |
| 3794 | SV_CWD_RETURN_UNDEF; |
| 3795 | } |
| 3796 | |
| 3797 | cdev = statbuf.st_dev; |
| 3798 | cino = statbuf.st_ino; |
| 3799 | |
| 3800 | if (odev == cdev && oino == cino) { |
| 3801 | break; |
| 3802 | } |
| 3803 | if (!(dir = PerlDir_open("."))) { |
| 3804 | SV_CWD_RETURN_UNDEF; |
| 3805 | } |
| 3806 | |
| 3807 | while ((dp = PerlDir_read(dir)) != NULL) { |
| 3808 | #ifdef DIRNAMLEN |
| 3809 | const int namelen = dp->d_namlen; |
| 3810 | #else |
| 3811 | const int namelen = strlen(dp->d_name); |
| 3812 | #endif |
| 3813 | /* skip . and .. */ |
| 3814 | if (SV_CWD_ISDOT(dp)) { |
| 3815 | continue; |
| 3816 | } |
| 3817 | |
| 3818 | if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) { |
| 3819 | SV_CWD_RETURN_UNDEF; |
| 3820 | } |
| 3821 | |
| 3822 | tdev = statbuf.st_dev; |
| 3823 | tino = statbuf.st_ino; |
| 3824 | if (tino == oino && tdev == odev) { |
| 3825 | break; |
| 3826 | } |
| 3827 | } |
| 3828 | |
| 3829 | if (!dp) { |
| 3830 | SV_CWD_RETURN_UNDEF; |
| 3831 | } |
| 3832 | |
| 3833 | if (pathlen + namelen + 1 >= MAXPATHLEN) { |
| 3834 | SV_CWD_RETURN_UNDEF; |
| 3835 | } |
| 3836 | |
| 3837 | SvGROW(sv, pathlen + namelen + 1); |
| 3838 | |
| 3839 | if (pathlen) { |
| 3840 | /* shift down */ |
| 3841 | Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char); |
| 3842 | } |
| 3843 | |
| 3844 | /* prepend current directory to the front */ |
| 3845 | *SvPVX(sv) = '/'; |
| 3846 | Move(dp->d_name, SvPVX(sv)+1, namelen, char); |
| 3847 | pathlen += (namelen + 1); |
| 3848 | |
| 3849 | #ifdef VOID_CLOSEDIR |
| 3850 | PerlDir_close(dir); |
| 3851 | #else |
| 3852 | if (PerlDir_close(dir) < 0) { |
| 3853 | SV_CWD_RETURN_UNDEF; |
| 3854 | } |
| 3855 | #endif |
| 3856 | } |
| 3857 | |
| 3858 | if (pathlen) { |
| 3859 | SvCUR_set(sv, pathlen); |
| 3860 | *SvEND(sv) = '\0'; |
| 3861 | SvPOK_only(sv); |
| 3862 | |
| 3863 | if (PerlDir_chdir(SvPVX_const(sv)) < 0) { |
| 3864 | SV_CWD_RETURN_UNDEF; |
| 3865 | } |
| 3866 | } |
| 3867 | if (PerlLIO_stat(".", &statbuf) < 0) { |
| 3868 | SV_CWD_RETURN_UNDEF; |
| 3869 | } |
| 3870 | |
| 3871 | cdev = statbuf.st_dev; |
| 3872 | cino = statbuf.st_ino; |
| 3873 | |
| 3874 | if (cdev != orig_cdev || cino != orig_cino) { |
| 3875 | Perl_croak(aTHX_ "Unstable directory path, " |
| 3876 | "current directory changed unexpectedly"); |
| 3877 | } |
| 3878 | |
| 3879 | return TRUE; |
| 3880 | #endif |
| 3881 | |
| 3882 | #else |
| 3883 | return FALSE; |
| 3884 | #endif |
| 3885 | } |
| 3886 | |
| 3887 | /* |
| 3888 | =for apidoc scan_version |
| 3889 | |
| 3890 | Returns a pointer to the next character after the parsed |
| 3891 | version string, as well as upgrading the passed in SV to |
| 3892 | an RV. |
| 3893 | |
| 3894 | Function must be called with an already existing SV like |
| 3895 | |
| 3896 | sv = newSV(0); |
| 3897 | s = scan_version(s,SV *sv, bool qv); |
| 3898 | |
| 3899 | Performs some preprocessing to the string to ensure that |
| 3900 | it has the correct characteristics of a version. Flags the |
| 3901 | object if it contains an underscore (which denotes this |
| 3902 | is a alpha version). The boolean qv denotes that the version |
| 3903 | should be interpreted as if it had multiple decimals, even if |
| 3904 | it doesn't. |
| 3905 | |
| 3906 | =cut |
| 3907 | */ |
| 3908 | |
| 3909 | const char * |
| 3910 | Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv) |
| 3911 | { |
| 3912 | const char *start; |
| 3913 | const char *pos; |
| 3914 | const char *last; |
| 3915 | int saw_period = 0; |
| 3916 | int alpha = 0; |
| 3917 | int width = 3; |
| 3918 | AV * const av = newAV(); |
| 3919 | SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */ |
| 3920 | (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */ |
| 3921 | |
| 3922 | #ifndef NODEFAULT_SHAREKEYS |
| 3923 | HvSHAREKEYS_on(hv); /* key-sharing on by default */ |
| 3924 | #endif |
| 3925 | |
| 3926 | while (isSPACE(*s)) /* leading whitespace is OK */ |
| 3927 | s++; |
| 3928 | |
| 3929 | if (*s == 'v') { |
| 3930 | s++; /* get past 'v' */ |
| 3931 | qv = 1; /* force quoted version processing */ |
| 3932 | } |
| 3933 | |
| 3934 | start = last = pos = s; |
| 3935 | |
| 3936 | /* pre-scan the input string to check for decimals/underbars */ |
| 3937 | while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) ) |
| 3938 | { |
| 3939 | if ( *pos == '.' ) |
| 3940 | { |
| 3941 | if ( alpha ) |
| 3942 | Perl_croak(aTHX_ "Invalid version format (underscores before decimal)"); |
| 3943 | saw_period++ ; |
| 3944 | last = pos; |
| 3945 | } |
| 3946 | else if ( *pos == '_' ) |
| 3947 | { |
| 3948 | if ( alpha ) |
| 3949 | Perl_croak(aTHX_ "Invalid version format (multiple underscores)"); |
| 3950 | alpha = 1; |
| 3951 | width = pos - last - 1; /* natural width of sub-version */ |
| 3952 | } |
| 3953 | pos++; |
| 3954 | } |
| 3955 | |
| 3956 | if ( saw_period > 1 ) |
| 3957 | qv = 1; /* force quoted version processing */ |
| 3958 | |
| 3959 | pos = s; |
| 3960 | |
| 3961 | if ( qv ) |
| 3962 | hv_store((HV *)hv, "qv", 2, newSViv(qv), 0); |
| 3963 | if ( alpha ) |
| 3964 | hv_store((HV *)hv, "alpha", 5, newSViv(alpha), 0); |
| 3965 | if ( !qv && width < 3 ) |
| 3966 | hv_store((HV *)hv, "width", 5, newSViv(width), 0); |
| 3967 | |
| 3968 | while (isDIGIT(*pos)) |
| 3969 | pos++; |
| 3970 | if (!isALPHA(*pos)) { |
| 3971 | I32 rev; |
| 3972 | |
| 3973 | for (;;) { |
| 3974 | rev = 0; |
| 3975 | { |
| 3976 | /* this is atoi() that delimits on underscores */ |
| 3977 | const char *end = pos; |
| 3978 | I32 mult = 1; |
| 3979 | I32 orev; |
| 3980 | |
| 3981 | /* the following if() will only be true after the decimal |
| 3982 | * point of a version originally created with a bare |
| 3983 | * floating point number, i.e. not quoted in any way |
| 3984 | */ |
| 3985 | if ( !qv && s > start && saw_period == 1 ) { |
| 3986 | mult *= 100; |
| 3987 | while ( s < end ) { |
| 3988 | orev = rev; |
| 3989 | rev += (*s - '0') * mult; |
| 3990 | mult /= 10; |
| 3991 | if ( PERL_ABS(orev) > PERL_ABS(rev) ) |
| 3992 | Perl_croak(aTHX_ "Integer overflow in version"); |
| 3993 | s++; |
| 3994 | if ( *s == '_' ) |
| 3995 | s++; |
| 3996 | } |
| 3997 | } |
| 3998 | else { |
| 3999 | while (--end >= s) { |
| 4000 | orev = rev; |
| 4001 | rev += (*end - '0') * mult; |
| 4002 | mult *= 10; |
| 4003 | if ( PERL_ABS(orev) > PERL_ABS(rev) ) |
| 4004 | Perl_croak(aTHX_ "Integer overflow in version"); |
| 4005 | } |
| 4006 | } |
| 4007 | } |
| 4008 | |
| 4009 | /* Append revision */ |
| 4010 | av_push(av, newSViv(rev)); |
| 4011 | if ( *pos == '.' && isDIGIT(pos[1]) ) |
| 4012 | s = ++pos; |
| 4013 | else if ( *pos == '_' && isDIGIT(pos[1]) ) |
| 4014 | s = ++pos; |
| 4015 | else if ( isDIGIT(*pos) ) |
| 4016 | s = pos; |
| 4017 | else { |
| 4018 | s = pos; |
| 4019 | break; |
| 4020 | } |
| 4021 | if ( qv ) { |
| 4022 | while ( isDIGIT(*pos) ) |
| 4023 | pos++; |
| 4024 | } |
| 4025 | else { |
| 4026 | int digits = 0; |
| 4027 | while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) { |
| 4028 | if ( *pos != '_' ) |
| 4029 | digits++; |
| 4030 | pos++; |
| 4031 | } |
| 4032 | } |
| 4033 | } |
| 4034 | } |
| 4035 | if ( qv ) { /* quoted versions always get at least three terms*/ |
| 4036 | I32 len = av_len(av); |
| 4037 | /* This for loop appears to trigger a compiler bug on OS X, as it |
| 4038 | loops infinitely. Yes, len is negative. No, it makes no sense. |
| 4039 | Compiler in question is: |
| 4040 | gcc version 3.3 20030304 (Apple Computer, Inc. build 1640) |
| 4041 | for ( len = 2 - len; len > 0; len-- ) |
| 4042 | av_push((AV *)sv, newSViv(0)); |
| 4043 | */ |
| 4044 | len = 2 - len; |
| 4045 | while (len-- > 0) |
| 4046 | av_push(av, newSViv(0)); |
| 4047 | } |
| 4048 | |
| 4049 | if ( av_len(av) == -1 ) /* oops, someone forgot to pass a value */ |
| 4050 | av_push(av, newSViv(0)); |
| 4051 | |
| 4052 | /* And finally, store the AV in the hash */ |
| 4053 | hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0); |
| 4054 | return s; |
| 4055 | } |
| 4056 | |
| 4057 | /* |
| 4058 | =for apidoc new_version |
| 4059 | |
| 4060 | Returns a new version object based on the passed in SV: |
| 4061 | |
| 4062 | SV *sv = new_version(SV *ver); |
| 4063 | |
| 4064 | Does not alter the passed in ver SV. See "upg_version" if you |
| 4065 | want to upgrade the SV. |
| 4066 | |
| 4067 | =cut |
| 4068 | */ |
| 4069 | |
| 4070 | SV * |
| 4071 | Perl_new_version(pTHX_ SV *ver) |
| 4072 | { |
| 4073 | SV * const rv = newSV(0); |
| 4074 | if ( sv_derived_from(ver,"version") ) /* can just copy directly */ |
| 4075 | { |
| 4076 | I32 key; |
| 4077 | AV * const av = newAV(); |
| 4078 | AV *sav; |
| 4079 | /* This will get reblessed later if a derived class*/ |
| 4080 | SV * const hv = newSVrv(rv, "version"); |
| 4081 | (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */ |
| 4082 | #ifndef NODEFAULT_SHAREKEYS |
| 4083 | HvSHAREKEYS_on(hv); /* key-sharing on by default */ |
| 4084 | #endif |
| 4085 | |
| 4086 | if ( SvROK(ver) ) |
| 4087 | ver = SvRV(ver); |
| 4088 | |
| 4089 | /* Begin copying all of the elements */ |
| 4090 | if ( hv_exists((HV *)ver, "qv", 2) ) |
| 4091 | hv_store((HV *)hv, "qv", 2, &PL_sv_yes, 0); |
| 4092 | |
| 4093 | if ( hv_exists((HV *)ver, "alpha", 5) ) |
| 4094 | hv_store((HV *)hv, "alpha", 5, &PL_sv_yes, 0); |
| 4095 | |
| 4096 | if ( hv_exists((HV*)ver, "width", 5 ) ) |
| 4097 | { |
| 4098 | const I32 width = SvIV(*hv_fetch((HV*)ver, "width", 5, FALSE)); |
| 4099 | hv_store((HV *)hv, "width", 5, newSViv(width), 0); |
| 4100 | } |
| 4101 | |
| 4102 | sav = (AV *)SvRV(*hv_fetch((HV*)ver, "version", 7, FALSE)); |
| 4103 | /* This will get reblessed later if a derived class*/ |
| 4104 | for ( key = 0; key <= av_len(sav); key++ ) |
| 4105 | { |
| 4106 | const I32 rev = SvIV(*av_fetch(sav, key, FALSE)); |
| 4107 | av_push(av, newSViv(rev)); |
| 4108 | } |
| 4109 | |
| 4110 | hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0); |
| 4111 | return rv; |
| 4112 | } |
| 4113 | #ifdef SvVOK |
| 4114 | if ( SvVOK(ver) ) { /* already a v-string */ |
| 4115 | const MAGIC* const mg = mg_find(ver,PERL_MAGIC_vstring); |
| 4116 | const STRLEN len = mg->mg_len; |
| 4117 | char * const version = savepvn( (const char*)mg->mg_ptr, len); |
| 4118 | sv_setpvn(rv,version,len); |
| 4119 | Safefree(version); |
| 4120 | } |
| 4121 | else { |
| 4122 | #endif |
| 4123 | sv_setsv(rv,ver); /* make a duplicate */ |
| 4124 | #ifdef SvVOK |
| 4125 | } |
| 4126 | #endif |
| 4127 | upg_version(rv); |
| 4128 | return rv; |
| 4129 | } |
| 4130 | |
| 4131 | /* |
| 4132 | =for apidoc upg_version |
| 4133 | |
| 4134 | In-place upgrade of the supplied SV to a version object. |
| 4135 | |
| 4136 | SV *sv = upg_version(SV *sv); |
| 4137 | |
| 4138 | Returns a pointer to the upgraded SV. |
| 4139 | |
| 4140 | =cut |
| 4141 | */ |
| 4142 | |
| 4143 | SV * |
| 4144 | Perl_upg_version(pTHX_ SV *ver) |
| 4145 | { |
| 4146 | char *version; |
| 4147 | bool qv = 0; |
| 4148 | |
| 4149 | if ( SvNOK(ver) ) /* may get too much accuracy */ |
| 4150 | { |
| 4151 | char tbuf[64]; |
| 4152 | const STRLEN len = my_sprintf(tbuf,"%.9"NVgf, SvNVX(ver)); |
| 4153 | version = savepvn(tbuf, len); |
| 4154 | } |
| 4155 | #ifdef SvVOK |
| 4156 | else if ( SvVOK(ver) ) { /* already a v-string */ |
| 4157 | const MAGIC* const mg = mg_find(ver,PERL_MAGIC_vstring); |
| 4158 | version = savepvn( (const char*)mg->mg_ptr,mg->mg_len ); |
| 4159 | qv = 1; |
| 4160 | } |
| 4161 | #endif |
| 4162 | else /* must be a string or something like a string */ |
| 4163 | { |
| 4164 | version = savepv(SvPV_nolen(ver)); |
| 4165 | } |
| 4166 | (void)scan_version(version, ver, qv); |
| 4167 | Safefree(version); |
| 4168 | return ver; |
| 4169 | } |
| 4170 | |
| 4171 | /* |
| 4172 | =for apidoc vverify |
| 4173 | |
| 4174 | Validates that the SV contains a valid version object. |
| 4175 | |
| 4176 | bool vverify(SV *vobj); |
| 4177 | |
| 4178 | Note that it only confirms the bare minimum structure (so as not to get |
| 4179 | confused by derived classes which may contain additional hash entries): |
| 4180 | |
| 4181 | =over 4 |
| 4182 | |
| 4183 | =item * The SV contains a [reference to a] hash |
| 4184 | |
| 4185 | =item * The hash contains a "version" key |
| 4186 | |
| 4187 | =item * The "version" key has [a reference to] an AV as its value |
| 4188 | |
| 4189 | =back |
| 4190 | |
| 4191 | =cut |
| 4192 | */ |
| 4193 | |
| 4194 | bool |
| 4195 | Perl_vverify(pTHX_ SV *vs) |
| 4196 | { |
| 4197 | SV *sv; |
| 4198 | if ( SvROK(vs) ) |
| 4199 | vs = SvRV(vs); |
| 4200 | |
| 4201 | /* see if the appropriate elements exist */ |
| 4202 | if ( SvTYPE(vs) == SVt_PVHV |
| 4203 | && hv_exists((HV*)vs, "version", 7) |
| 4204 | && (sv = SvRV(*hv_fetch((HV*)vs, "version", 7, FALSE))) |
| 4205 | && SvTYPE(sv) == SVt_PVAV ) |
| 4206 | return TRUE; |
| 4207 | else |
| 4208 | return FALSE; |
| 4209 | } |
| 4210 | |
| 4211 | /* |
| 4212 | =for apidoc vnumify |
| 4213 | |
| 4214 | Accepts a version object and returns the normalized floating |
| 4215 | point representation. Call like: |
| 4216 | |
| 4217 | sv = vnumify(rv); |
| 4218 | |
| 4219 | NOTE: you can pass either the object directly or the SV |
| 4220 | contained within the RV. |
| 4221 | |
| 4222 | =cut |
| 4223 | */ |
| 4224 | |
| 4225 | SV * |
| 4226 | Perl_vnumify(pTHX_ SV *vs) |
| 4227 | { |
| 4228 | I32 i, len, digit; |
| 4229 | int width; |
| 4230 | bool alpha = FALSE; |
| 4231 | SV * const sv = newSV(0); |
| 4232 | AV *av; |
| 4233 | if ( SvROK(vs) ) |
| 4234 | vs = SvRV(vs); |
| 4235 | |
| 4236 | if ( !vverify(vs) ) |
| 4237 | Perl_croak(aTHX_ "Invalid version object"); |
| 4238 | |
| 4239 | /* see if various flags exist */ |
| 4240 | if ( hv_exists((HV*)vs, "alpha", 5 ) ) |
| 4241 | alpha = TRUE; |
| 4242 | if ( hv_exists((HV*)vs, "width", 5 ) ) |
| 4243 | width = SvIV(*hv_fetch((HV*)vs, "width", 5, FALSE)); |
| 4244 | else |
| 4245 | width = 3; |
| 4246 | |
| 4247 | |
| 4248 | /* attempt to retrieve the version array */ |
| 4249 | if ( !(av = (AV *)SvRV(*hv_fetch((HV*)vs, "version", 7, FALSE)) ) ) { |
| 4250 | sv_catpvn(sv,"0",1); |
| 4251 | return sv; |
| 4252 | } |
| 4253 | |
| 4254 | len = av_len(av); |
| 4255 | if ( len == -1 ) |
| 4256 | { |
| 4257 | sv_catpvn(sv,"0",1); |
| 4258 | return sv; |
| 4259 | } |
| 4260 | |
| 4261 | digit = SvIV(*av_fetch(av, 0, 0)); |
| 4262 | Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit)); |
| 4263 | for ( i = 1 ; i < len ; i++ ) |
| 4264 | { |
| 4265 | digit = SvIV(*av_fetch(av, i, 0)); |
| 4266 | if ( width < 3 ) { |
| 4267 | const int denom = (int)pow(10,(3-width)); |
| 4268 | const div_t term = div((int)PERL_ABS(digit),denom); |
| 4269 | Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem); |
| 4270 | } |
| 4271 | else { |
| 4272 | Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit); |
| 4273 | } |
| 4274 | } |
| 4275 | |
| 4276 | if ( len > 0 ) |
| 4277 | { |
| 4278 | digit = SvIV(*av_fetch(av, len, 0)); |
| 4279 | if ( alpha && width == 3 ) /* alpha version */ |
| 4280 | sv_catpvn(sv,"_",1); |
| 4281 | Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit); |
| 4282 | } |
| 4283 | else /* len == 0 */ |
| 4284 | { |
| 4285 | sv_catpvn(sv,"000",3); |
| 4286 | } |
| 4287 | return sv; |
| 4288 | } |
| 4289 | |
| 4290 | /* |
| 4291 | =for apidoc vnormal |
| 4292 | |
| 4293 | Accepts a version object and returns the normalized string |
| 4294 | representation. Call like: |
| 4295 | |
| 4296 | sv = vnormal(rv); |
| 4297 | |
| 4298 | NOTE: you can pass either the object directly or the SV |
| 4299 | contained within the RV. |
| 4300 | |
| 4301 | =cut |
| 4302 | */ |
| 4303 | |
| 4304 | SV * |
| 4305 | Perl_vnormal(pTHX_ SV *vs) |
| 4306 | { |
| 4307 | I32 i, len, digit; |
| 4308 | bool alpha = FALSE; |
| 4309 | SV * const sv = newSV(0); |
| 4310 | AV *av; |
| 4311 | if ( SvROK(vs) ) |
| 4312 | vs = SvRV(vs); |
| 4313 | |
| 4314 | if ( !vverify(vs) ) |
| 4315 | Perl_croak(aTHX_ "Invalid version object"); |
| 4316 | |
| 4317 | if ( hv_exists((HV*)vs, "alpha", 5 ) ) |
| 4318 | alpha = TRUE; |
| 4319 | av = (AV *)SvRV(*hv_fetch((HV*)vs, "version", 7, FALSE)); |
| 4320 | |
| 4321 | len = av_len(av); |
| 4322 | if ( len == -1 ) |
| 4323 | { |
| 4324 | sv_catpvn(sv,"",0); |
| 4325 | return sv; |
| 4326 | } |
| 4327 | digit = SvIV(*av_fetch(av, 0, 0)); |
| 4328 | Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit); |
| 4329 | for ( i = 1 ; i < len ; i++ ) { |
| 4330 | digit = SvIV(*av_fetch(av, i, 0)); |
| 4331 | Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit); |
| 4332 | } |
| 4333 | |
| 4334 | if ( len > 0 ) |
| 4335 | { |
| 4336 | /* handle last digit specially */ |
| 4337 | digit = SvIV(*av_fetch(av, len, 0)); |
| 4338 | if ( alpha ) |
| 4339 | Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit); |
| 4340 | else |
| 4341 | Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit); |
| 4342 | } |
| 4343 | |
| 4344 | if ( len <= 2 ) { /* short version, must be at least three */ |
| 4345 | for ( len = 2 - len; len != 0; len-- ) |
| 4346 | sv_catpvn(sv,".0",2); |
| 4347 | } |
| 4348 | return sv; |
| 4349 | } |
| 4350 | |
| 4351 | /* |
| 4352 | =for apidoc vstringify |
| 4353 | |
| 4354 | In order to maintain maximum compatibility with earlier versions |
| 4355 | of Perl, this function will return either the floating point |
| 4356 | notation or the multiple dotted notation, depending on whether |
| 4357 | the original version contained 1 or more dots, respectively |
| 4358 | |
| 4359 | =cut |
| 4360 | */ |
| 4361 | |
| 4362 | SV * |
| 4363 | Perl_vstringify(pTHX_ SV *vs) |
| 4364 | { |
| 4365 | if ( SvROK(vs) ) |
| 4366 | vs = SvRV(vs); |
| 4367 | |
| 4368 | if ( !vverify(vs) ) |
| 4369 | Perl_croak(aTHX_ "Invalid version object"); |
| 4370 | |
| 4371 | if ( hv_exists((HV *)vs, "qv", 2) ) |
| 4372 | return vnormal(vs); |
| 4373 | else |
| 4374 | return vnumify(vs); |
| 4375 | } |
| 4376 | |
| 4377 | /* |
| 4378 | =for apidoc vcmp |
| 4379 | |
| 4380 | Version object aware cmp. Both operands must already have been |
| 4381 | converted into version objects. |
| 4382 | |
| 4383 | =cut |
| 4384 | */ |
| 4385 | |
| 4386 | int |
| 4387 | Perl_vcmp(pTHX_ SV *lhv, SV *rhv) |
| 4388 | { |
| 4389 | I32 i,l,m,r,retval; |
| 4390 | bool lalpha = FALSE; |
| 4391 | bool ralpha = FALSE; |
| 4392 | I32 left = 0; |
| 4393 | I32 right = 0; |
| 4394 | AV *lav, *rav; |
| 4395 | if ( SvROK(lhv) ) |
| 4396 | lhv = SvRV(lhv); |
| 4397 | if ( SvROK(rhv) ) |
| 4398 | rhv = SvRV(rhv); |
| 4399 | |
| 4400 | if ( !vverify(lhv) ) |
| 4401 | Perl_croak(aTHX_ "Invalid version object"); |
| 4402 | |
| 4403 | if ( !vverify(rhv) ) |
| 4404 | Perl_croak(aTHX_ "Invalid version object"); |
| 4405 | |
| 4406 | /* get the left hand term */ |
| 4407 | lav = (AV *)SvRV(*hv_fetch((HV*)lhv, "version", 7, FALSE)); |
| 4408 | if ( hv_exists((HV*)lhv, "alpha", 5 ) ) |
| 4409 | lalpha = TRUE; |
| 4410 | |
| 4411 | /* and the right hand term */ |
| 4412 | rav = (AV *)SvRV(*hv_fetch((HV*)rhv, "version", 7, FALSE)); |
| 4413 | if ( hv_exists((HV*)rhv, "alpha", 5 ) ) |
| 4414 | ralpha = TRUE; |
| 4415 | |
| 4416 | l = av_len(lav); |
| 4417 | r = av_len(rav); |
| 4418 | m = l < r ? l : r; |
| 4419 | retval = 0; |
| 4420 | i = 0; |
| 4421 | while ( i <= m && retval == 0 ) |
| 4422 | { |
| 4423 | left = SvIV(*av_fetch(lav,i,0)); |
| 4424 | right = SvIV(*av_fetch(rav,i,0)); |
| 4425 | if ( left < right ) |
| 4426 | retval = -1; |
| 4427 | if ( left > right ) |
| 4428 | retval = +1; |
| 4429 | i++; |
| 4430 | } |
| 4431 | |
| 4432 | /* tiebreaker for alpha with identical terms */ |
| 4433 | if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) ) |
| 4434 | { |
| 4435 | if ( lalpha && !ralpha ) |
| 4436 | { |
| 4437 | retval = -1; |
| 4438 | } |
| 4439 | else if ( ralpha && !lalpha) |
| 4440 | { |
| 4441 | retval = +1; |
| 4442 | } |
| 4443 | } |
| 4444 | |
| 4445 | if ( l != r && retval == 0 ) /* possible match except for trailing 0's */ |
| 4446 | { |
| 4447 | if ( l < r ) |
| 4448 | { |
| 4449 | while ( i <= r && retval == 0 ) |
| 4450 | { |
| 4451 | if ( SvIV(*av_fetch(rav,i,0)) != 0 ) |
| 4452 | retval = -1; /* not a match after all */ |
| 4453 | i++; |
| 4454 | } |
| 4455 | } |
| 4456 | else |
| 4457 | { |
| 4458 | while ( i <= l && retval == 0 ) |
| 4459 | { |
| 4460 | if ( SvIV(*av_fetch(lav,i,0)) != 0 ) |
| 4461 | retval = +1; /* not a match after all */ |
| 4462 | i++; |
| 4463 | } |
| 4464 | } |
| 4465 | } |
| 4466 | return retval; |
| 4467 | } |
| 4468 | |
| 4469 | #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT) |
| 4470 | # define EMULATE_SOCKETPAIR_UDP |
| 4471 | #endif |
| 4472 | |
| 4473 | #ifdef EMULATE_SOCKETPAIR_UDP |
| 4474 | static int |
| 4475 | S_socketpair_udp (int fd[2]) { |
| 4476 | dTHX; |
| 4477 | /* Fake a datagram socketpair using UDP to localhost. */ |
| 4478 | int sockets[2] = {-1, -1}; |
| 4479 | struct sockaddr_in addresses[2]; |
| 4480 | int i; |
| 4481 | Sock_size_t size = sizeof(struct sockaddr_in); |
| 4482 | unsigned short port; |
| 4483 | int got; |
| 4484 | |
| 4485 | memset(&addresses, 0, sizeof(addresses)); |
| 4486 | i = 1; |
| 4487 | do { |
| 4488 | sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET); |
| 4489 | if (sockets[i] == -1) |
| 4490 | goto tidy_up_and_fail; |
| 4491 | |
| 4492 | addresses[i].sin_family = AF_INET; |
| 4493 | addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 4494 | addresses[i].sin_port = 0; /* kernel choses port. */ |
| 4495 | if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i], |
| 4496 | sizeof(struct sockaddr_in)) == -1) |
| 4497 | goto tidy_up_and_fail; |
| 4498 | } while (i--); |
| 4499 | |
| 4500 | /* Now have 2 UDP sockets. Find out which port each is connected to, and |
| 4501 | for each connect the other socket to it. */ |
| 4502 | i = 1; |
| 4503 | do { |
| 4504 | if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i], |
| 4505 | &size) == -1) |
| 4506 | goto tidy_up_and_fail; |
| 4507 | if (size != sizeof(struct sockaddr_in)) |
| 4508 | goto abort_tidy_up_and_fail; |
| 4509 | /* !1 is 0, !0 is 1 */ |
| 4510 | if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i], |
| 4511 | sizeof(struct sockaddr_in)) == -1) |
| 4512 | goto tidy_up_and_fail; |
| 4513 | } while (i--); |
| 4514 | |
| 4515 | /* Now we have 2 sockets connected to each other. I don't trust some other |
| 4516 | process not to have already sent a packet to us (by random) so send |
| 4517 | a packet from each to the other. */ |
| 4518 | i = 1; |
| 4519 | do { |
| 4520 | /* I'm going to send my own port number. As a short. |
| 4521 | (Who knows if someone somewhere has sin_port as a bitfield and needs |
| 4522 | this routine. (I'm assuming crays have socketpair)) */ |
| 4523 | port = addresses[i].sin_port; |
| 4524 | got = PerlLIO_write(sockets[i], &port, sizeof(port)); |
| 4525 | if (got != sizeof(port)) { |
| 4526 | if (got == -1) |
| 4527 | goto tidy_up_and_fail; |
| 4528 | goto abort_tidy_up_and_fail; |
| 4529 | } |
| 4530 | } while (i--); |
| 4531 | |
| 4532 | /* Packets sent. I don't trust them to have arrived though. |
| 4533 | (As I understand it Solaris TCP stack is multithreaded. Non-blocking |
| 4534 | connect to localhost will use a second kernel thread. In 2.6 the |
| 4535 | first thread running the connect() returns before the second completes, |
| 4536 | so EINPROGRESS> In 2.7 the improved stack is faster and connect() |
| 4537 | returns 0. Poor programs have tripped up. One poor program's authors' |
| 4538 | had a 50-1 reverse stock split. Not sure how connected these were.) |
| 4539 | So I don't trust someone not to have an unpredictable UDP stack. |
| 4540 | */ |
| 4541 | |
| 4542 | { |
| 4543 | struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */ |
| 4544 | int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0]; |
| 4545 | fd_set rset; |
| 4546 | |
| 4547 | FD_ZERO(&rset); |
| 4548 | FD_SET(sockets[0], &rset); |
| 4549 | FD_SET(sockets[1], &rset); |
| 4550 | |
| 4551 | got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor); |
| 4552 | if (got != 2 || !FD_ISSET(sockets[0], &rset) |
| 4553 | || !FD_ISSET(sockets[1], &rset)) { |
| 4554 | /* I hope this is portable and appropriate. */ |
| 4555 | if (got == -1) |
| 4556 | goto tidy_up_and_fail; |
| 4557 | goto abort_tidy_up_and_fail; |
| 4558 | } |
| 4559 | } |
| 4560 | |
| 4561 | /* And the paranoia department even now doesn't trust it to have arrive |
| 4562 | (hence MSG_DONTWAIT). Or that what arrives was sent by us. */ |
| 4563 | { |
| 4564 | struct sockaddr_in readfrom; |
| 4565 | unsigned short buffer[2]; |
| 4566 | |
| 4567 | i = 1; |
| 4568 | do { |
| 4569 | #ifdef MSG_DONTWAIT |
| 4570 | got = PerlSock_recvfrom(sockets[i], (char *) &buffer, |
| 4571 | sizeof(buffer), MSG_DONTWAIT, |
| 4572 | (struct sockaddr *) &readfrom, &size); |
| 4573 | #else |
| 4574 | got = PerlSock_recvfrom(sockets[i], (char *) &buffer, |
| 4575 | sizeof(buffer), 0, |
| 4576 | (struct sockaddr *) &readfrom, &size); |
| 4577 | #endif |
| 4578 | |
| 4579 | if (got == -1) |
| 4580 | goto tidy_up_and_fail; |
| 4581 | if (got != sizeof(port) |
| 4582 | || size != sizeof(struct sockaddr_in) |
| 4583 | /* Check other socket sent us its port. */ |
| 4584 | || buffer[0] != (unsigned short) addresses[!i].sin_port |
| 4585 | /* Check kernel says we got the datagram from that socket */ |
| 4586 | || readfrom.sin_family != addresses[!i].sin_family |
| 4587 | || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr |
| 4588 | || readfrom.sin_port != addresses[!i].sin_port) |
| 4589 | goto abort_tidy_up_and_fail; |
| 4590 | } while (i--); |
| 4591 | } |
| 4592 | /* My caller (my_socketpair) has validated that this is non-NULL */ |
| 4593 | fd[0] = sockets[0]; |
| 4594 | fd[1] = sockets[1]; |
| 4595 | /* I hereby declare this connection open. May God bless all who cross |
| 4596 | her. */ |
| 4597 | return 0; |
| 4598 | |
| 4599 | abort_tidy_up_and_fail: |
| 4600 | errno = ECONNABORTED; |
| 4601 | tidy_up_and_fail: |
| 4602 | { |
| 4603 | const int save_errno = errno; |
| 4604 | if (sockets[0] != -1) |
| 4605 | PerlLIO_close(sockets[0]); |
| 4606 | if (sockets[1] != -1) |
| 4607 | PerlLIO_close(sockets[1]); |
| 4608 | errno = save_errno; |
| 4609 | return -1; |
| 4610 | } |
| 4611 | } |
| 4612 | #endif /* EMULATE_SOCKETPAIR_UDP */ |
| 4613 | |
| 4614 | #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) |
| 4615 | int |
| 4616 | Perl_my_socketpair (int family, int type, int protocol, int fd[2]) { |
| 4617 | /* Stevens says that family must be AF_LOCAL, protocol 0. |
| 4618 | I'm going to enforce that, then ignore it, and use TCP (or UDP). */ |
| 4619 | dTHX; |
| 4620 | int listener = -1; |
| 4621 | int connector = -1; |
| 4622 | int acceptor = -1; |
| 4623 | struct sockaddr_in listen_addr; |
| 4624 | struct sockaddr_in connect_addr; |
| 4625 | Sock_size_t size; |
| 4626 | |
| 4627 | if (protocol |
| 4628 | #ifdef AF_UNIX |
| 4629 | || family != AF_UNIX |
| 4630 | #endif |
| 4631 | ) { |
| 4632 | errno = EAFNOSUPPORT; |
| 4633 | return -1; |
| 4634 | } |
| 4635 | if (!fd) { |
| 4636 | errno = EINVAL; |
| 4637 | return -1; |
| 4638 | } |
| 4639 | |
| 4640 | #ifdef EMULATE_SOCKETPAIR_UDP |
| 4641 | if (type == SOCK_DGRAM) |
| 4642 | return S_socketpair_udp(fd); |
| 4643 | #endif |
| 4644 | |
| 4645 | listener = PerlSock_socket(AF_INET, type, 0); |
| 4646 | if (listener == -1) |
| 4647 | return -1; |
| 4648 | memset(&listen_addr, 0, sizeof(listen_addr)); |
| 4649 | listen_addr.sin_family = AF_INET; |
| 4650 | listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 4651 | listen_addr.sin_port = 0; /* kernel choses port. */ |
| 4652 | if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr, |
| 4653 | sizeof(listen_addr)) == -1) |
| 4654 | goto tidy_up_and_fail; |
| 4655 | if (PerlSock_listen(listener, 1) == -1) |
| 4656 | goto tidy_up_and_fail; |
| 4657 | |
| 4658 | connector = PerlSock_socket(AF_INET, type, 0); |
| 4659 | if (connector == -1) |
| 4660 | goto tidy_up_and_fail; |
| 4661 | /* We want to find out the port number to connect to. */ |
| 4662 | size = sizeof(connect_addr); |
| 4663 | if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr, |
| 4664 | &size) == -1) |
| 4665 | goto tidy_up_and_fail; |
| 4666 | if (size != sizeof(connect_addr)) |
| 4667 | goto abort_tidy_up_and_fail; |
| 4668 | if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr, |
| 4669 | sizeof(connect_addr)) == -1) |
| 4670 | goto tidy_up_and_fail; |
| 4671 | |
| 4672 | size = sizeof(listen_addr); |
| 4673 | acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr, |
| 4674 | &size); |
| 4675 | if (acceptor == -1) |
| 4676 | goto tidy_up_and_fail; |
| 4677 | if (size != sizeof(listen_addr)) |
| 4678 | goto abort_tidy_up_and_fail; |
| 4679 | PerlLIO_close(listener); |
| 4680 | /* Now check we are talking to ourself by matching port and host on the |
| 4681 | two sockets. */ |
| 4682 | if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr, |
| 4683 | &size) == -1) |
| 4684 | goto tidy_up_and_fail; |
| 4685 | if (size != sizeof(connect_addr) |
| 4686 | || listen_addr.sin_family != connect_addr.sin_family |
| 4687 | || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr |
| 4688 | || listen_addr.sin_port != connect_addr.sin_port) { |
| 4689 | goto abort_tidy_up_and_fail; |
| 4690 | } |
| 4691 | fd[0] = connector; |
| 4692 | fd[1] = acceptor; |
| 4693 | return 0; |
| 4694 | |
| 4695 | abort_tidy_up_and_fail: |
| 4696 | #ifdef ECONNABORTED |
| 4697 | errno = ECONNABORTED; /* This would be the standard thing to do. */ |
| 4698 | #else |
| 4699 | # ifdef ECONNREFUSED |
| 4700 | errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */ |
| 4701 | # else |
| 4702 | errno = ETIMEDOUT; /* Desperation time. */ |
| 4703 | # endif |
| 4704 | #endif |
| 4705 | tidy_up_and_fail: |
| 4706 | { |
| 4707 | const int save_errno = errno; |
| 4708 | if (listener != -1) |
| 4709 | PerlLIO_close(listener); |
| 4710 | if (connector != -1) |
| 4711 | PerlLIO_close(connector); |
| 4712 | if (acceptor != -1) |
| 4713 | PerlLIO_close(acceptor); |
| 4714 | errno = save_errno; |
| 4715 | return -1; |
| 4716 | } |
| 4717 | } |
| 4718 | #else |
| 4719 | /* In any case have a stub so that there's code corresponding |
| 4720 | * to the my_socketpair in global.sym. */ |
| 4721 | int |
| 4722 | Perl_my_socketpair (int family, int type, int protocol, int fd[2]) { |
| 4723 | #ifdef HAS_SOCKETPAIR |
| 4724 | return socketpair(family, type, protocol, fd); |
| 4725 | #else |
| 4726 | return -1; |
| 4727 | #endif |
| 4728 | } |
| 4729 | #endif |
| 4730 | |
| 4731 | /* |
| 4732 | |
| 4733 | =for apidoc sv_nosharing |
| 4734 | |
| 4735 | Dummy routine which "shares" an SV when there is no sharing module present. |
| 4736 | Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument. |
| 4737 | Exists to avoid test for a NULL function pointer and because it could |
| 4738 | potentially warn under some level of strict-ness. |
| 4739 | |
| 4740 | =cut |
| 4741 | */ |
| 4742 | |
| 4743 | void |
| 4744 | Perl_sv_nosharing(pTHX_ SV *sv) |
| 4745 | { |
| 4746 | PERL_UNUSED_ARG(sv); |
| 4747 | } |
| 4748 | |
| 4749 | U32 |
| 4750 | Perl_parse_unicode_opts(pTHX_ const char **popt) |
| 4751 | { |
| 4752 | const char *p = *popt; |
| 4753 | U32 opt = 0; |
| 4754 | |
| 4755 | if (*p) { |
| 4756 | if (isDIGIT(*p)) { |
| 4757 | opt = (U32) atoi(p); |
| 4758 | while (isDIGIT(*p)) p++; |
| 4759 | if (*p && *p != '\n' && *p != '\r') |
| 4760 | Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p); |
| 4761 | } |
| 4762 | else { |
| 4763 | for (; *p; p++) { |
| 4764 | switch (*p) { |
| 4765 | case PERL_UNICODE_STDIN: |
| 4766 | opt |= PERL_UNICODE_STDIN_FLAG; break; |
| 4767 | case PERL_UNICODE_STDOUT: |
| 4768 | opt |= PERL_UNICODE_STDOUT_FLAG; break; |
| 4769 | case PERL_UNICODE_STDERR: |
| 4770 | opt |= PERL_UNICODE_STDERR_FLAG; break; |
| 4771 | case PERL_UNICODE_STD: |
| 4772 | opt |= PERL_UNICODE_STD_FLAG; break; |
| 4773 | case PERL_UNICODE_IN: |
| 4774 | opt |= PERL_UNICODE_IN_FLAG; break; |
| 4775 | case PERL_UNICODE_OUT: |
| 4776 | opt |= PERL_UNICODE_OUT_FLAG; break; |
| 4777 | case PERL_UNICODE_INOUT: |
| 4778 | opt |= PERL_UNICODE_INOUT_FLAG; break; |
| 4779 | case PERL_UNICODE_LOCALE: |
| 4780 | opt |= PERL_UNICODE_LOCALE_FLAG; break; |
| 4781 | case PERL_UNICODE_ARGV: |
| 4782 | opt |= PERL_UNICODE_ARGV_FLAG; break; |
| 4783 | default: |
| 4784 | if (*p != '\n' && *p != '\r') |
| 4785 | Perl_croak(aTHX_ |
| 4786 | "Unknown Unicode option letter '%c'", *p); |
| 4787 | } |
| 4788 | } |
| 4789 | } |
| 4790 | } |
| 4791 | else |
| 4792 | opt = PERL_UNICODE_DEFAULT_FLAGS; |
| 4793 | |
| 4794 | if (opt & ~PERL_UNICODE_ALL_FLAGS) |
| 4795 | Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf, |
| 4796 | (UV) (opt & ~PERL_UNICODE_ALL_FLAGS)); |
| 4797 | |
| 4798 | *popt = p; |
| 4799 | |
| 4800 | return opt; |
| 4801 | } |
| 4802 | |
| 4803 | U32 |
| 4804 | Perl_seed(pTHX) |
| 4805 | { |
| 4806 | /* |
| 4807 | * This is really just a quick hack which grabs various garbage |
| 4808 | * values. It really should be a real hash algorithm which |
| 4809 | * spreads the effect of every input bit onto every output bit, |
| 4810 | * if someone who knows about such things would bother to write it. |
| 4811 | * Might be a good idea to add that function to CORE as well. |
| 4812 | * No numbers below come from careful analysis or anything here, |
| 4813 | * except they are primes and SEED_C1 > 1E6 to get a full-width |
| 4814 | * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should |
| 4815 | * probably be bigger too. |
| 4816 | */ |
| 4817 | #if RANDBITS > 16 |
| 4818 | # define SEED_C1 1000003 |
| 4819 | #define SEED_C4 73819 |
| 4820 | #else |
| 4821 | # define SEED_C1 25747 |
| 4822 | #define SEED_C4 20639 |
| 4823 | #endif |
| 4824 | #define SEED_C2 3 |
| 4825 | #define SEED_C3 269 |
| 4826 | #define SEED_C5 26107 |
| 4827 | |
| 4828 | #ifndef PERL_NO_DEV_RANDOM |
| 4829 | int fd; |
| 4830 | #endif |
| 4831 | U32 u; |
| 4832 | #ifdef VMS |
| 4833 | # include <starlet.h> |
| 4834 | /* when[] = (low 32 bits, high 32 bits) of time since epoch |
| 4835 | * in 100-ns units, typically incremented ever 10 ms. */ |
| 4836 | unsigned int when[2]; |
| 4837 | #else |
| 4838 | # ifdef HAS_GETTIMEOFDAY |
| 4839 | struct timeval when; |
| 4840 | # else |
| 4841 | Time_t when; |
| 4842 | # endif |
| 4843 | #endif |
| 4844 | |
| 4845 | /* This test is an escape hatch, this symbol isn't set by Configure. */ |
| 4846 | #ifndef PERL_NO_DEV_RANDOM |
| 4847 | #ifndef PERL_RANDOM_DEVICE |
| 4848 | /* /dev/random isn't used by default because reads from it will block |
| 4849 | * if there isn't enough entropy available. You can compile with |
| 4850 | * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there |
| 4851 | * is enough real entropy to fill the seed. */ |
| 4852 | # define PERL_RANDOM_DEVICE "/dev/urandom" |
| 4853 | #endif |
| 4854 | fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0); |
| 4855 | if (fd != -1) { |
| 4856 | if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u) |
| 4857 | u = 0; |
| 4858 | PerlLIO_close(fd); |
| 4859 | if (u) |
| 4860 | return u; |
| 4861 | } |
| 4862 | #endif |
| 4863 | |
| 4864 | #ifdef VMS |
| 4865 | _ckvmssts(sys$gettim(when)); |
| 4866 | u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1]; |
| 4867 | #else |
| 4868 | # ifdef HAS_GETTIMEOFDAY |
| 4869 | PerlProc_gettimeofday(&when,NULL); |
| 4870 | u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec; |
| 4871 | # else |
| 4872 | (void)time(&when); |
| 4873 | u = (U32)SEED_C1 * when; |
| 4874 | # endif |
| 4875 | #endif |
| 4876 | u += SEED_C3 * (U32)PerlProc_getpid(); |
| 4877 | u += SEED_C4 * (U32)PTR2UV(PL_stack_sp); |
| 4878 | #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */ |
| 4879 | u += SEED_C5 * (U32)PTR2UV(&when); |
| 4880 | #endif |
| 4881 | return u; |
| 4882 | } |
| 4883 | |
| 4884 | UV |
| 4885 | Perl_get_hash_seed(pTHX) |
| 4886 | { |
| 4887 | const char *s = PerlEnv_getenv("PERL_HASH_SEED"); |
| 4888 | UV myseed = 0; |
| 4889 | |
| 4890 | if (s) |
| 4891 | while (isSPACE(*s)) s++; |
| 4892 | if (s && isDIGIT(*s)) |
| 4893 | myseed = (UV)Atoul(s); |
| 4894 | else |
| 4895 | #ifdef USE_HASH_SEED_EXPLICIT |
| 4896 | if (s) |
| 4897 | #endif |
| 4898 | { |
| 4899 | /* Compute a random seed */ |
| 4900 | (void)seedDrand01((Rand_seed_t)seed()); |
| 4901 | myseed = (UV)(Drand01() * (NV)UV_MAX); |
| 4902 | #if RANDBITS < (UVSIZE * 8) |
| 4903 | /* Since there are not enough randbits to to reach all |
| 4904 | * the bits of a UV, the low bits might need extra |
| 4905 | * help. Sum in another random number that will |
| 4906 | * fill in the low bits. */ |
| 4907 | myseed += |
| 4908 | (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1)); |
| 4909 | #endif /* RANDBITS < (UVSIZE * 8) */ |
| 4910 | if (myseed == 0) { /* Superparanoia. */ |
| 4911 | myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */ |
| 4912 | if (myseed == 0) |
| 4913 | Perl_croak(aTHX_ "Your random numbers are not that random"); |
| 4914 | } |
| 4915 | } |
| 4916 | PL_rehash_seed_set = TRUE; |
| 4917 | |
| 4918 | return myseed; |
| 4919 | } |
| 4920 | |
| 4921 | #ifdef USE_ITHREADS |
| 4922 | bool |
| 4923 | Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv) |
| 4924 | { |
| 4925 | const char * const stashpv = CopSTASHPV(c); |
| 4926 | const char * const name = HvNAME_get(hv); |
| 4927 | |
| 4928 | if (stashpv == name) |
| 4929 | return TRUE; |
| 4930 | if (stashpv && name) |
| 4931 | if (strEQ(stashpv, name)) |
| 4932 | return TRUE; |
| 4933 | return FALSE; |
| 4934 | } |
| 4935 | #endif |
| 4936 | |
| 4937 | |
| 4938 | #ifdef PERL_GLOBAL_STRUCT |
| 4939 | |
| 4940 | struct perl_vars * |
| 4941 | Perl_init_global_struct(pTHX) |
| 4942 | { |
| 4943 | struct perl_vars *plvarsp = NULL; |
| 4944 | #ifdef PERL_GLOBAL_STRUCT |
| 4945 | # define PERL_GLOBAL_STRUCT_INIT |
| 4946 | # include "opcode.h" /* the ppaddr and check */ |
| 4947 | const IV nppaddr = sizeof(Gppaddr)/sizeof(Perl_ppaddr_t); |
| 4948 | const IV ncheck = sizeof(Gcheck) /sizeof(Perl_check_t); |
| 4949 | # ifdef PERL_GLOBAL_STRUCT_PRIVATE |
| 4950 | /* PerlMem_malloc() because can't use even safesysmalloc() this early. */ |
| 4951 | plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars)); |
| 4952 | if (!plvarsp) |
| 4953 | exit(1); |
| 4954 | # else |
| 4955 | plvarsp = PL_VarsPtr; |
| 4956 | # endif /* PERL_GLOBAL_STRUCT_PRIVATE */ |
| 4957 | # undef PERLVAR |
| 4958 | # undef PERLVARA |
| 4959 | # undef PERLVARI |
| 4960 | # undef PERLVARIC |
| 4961 | # undef PERLVARISC |
| 4962 | # define PERLVAR(var,type) /**/ |
| 4963 | # define PERLVARA(var,n,type) /**/ |
| 4964 | # define PERLVARI(var,type,init) plvarsp->var = init; |
| 4965 | # define PERLVARIC(var,type,init) plvarsp->var = init; |
| 4966 | # define PERLVARISC(var,init) Copy(init, plvarsp->var, sizeof(init), char); |
| 4967 | # include "perlvars.h" |
| 4968 | # undef PERLVAR |
| 4969 | # undef PERLVARA |
| 4970 | # undef PERLVARI |
| 4971 | # undef PERLVARIC |
| 4972 | # undef PERLVARISC |
| 4973 | # ifdef PERL_GLOBAL_STRUCT |
| 4974 | plvarsp->Gppaddr = PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t)); |
| 4975 | if (!plvarsp->Gppaddr) |
| 4976 | exit(1); |
| 4977 | plvarsp->Gcheck = PerlMem_malloc(ncheck * sizeof(Perl_check_t)); |
| 4978 | if (!plvarsp->Gcheck) |
| 4979 | exit(1); |
| 4980 | Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t); |
| 4981 | Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t); |
| 4982 | # endif |
| 4983 | # ifdef PERL_SET_VARS |
| 4984 | PERL_SET_VARS(plvarsp); |
| 4985 | # endif |
| 4986 | # undef PERL_GLOBAL_STRUCT_INIT |
| 4987 | #endif |
| 4988 | return plvarsp; |
| 4989 | } |
| 4990 | |
| 4991 | #endif /* PERL_GLOBAL_STRUCT */ |
| 4992 | |
| 4993 | #ifdef PERL_GLOBAL_STRUCT |
| 4994 | |
| 4995 | void |
| 4996 | Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp) |
| 4997 | { |
| 4998 | #ifdef PERL_GLOBAL_STRUCT |
| 4999 | # ifdef PERL_UNSET_VARS |
| 5000 | PERL_UNSET_VARS(plvarsp); |
| 5001 | # endif |
| 5002 | free(plvarsp->Gppaddr); |
| 5003 | free(plvarsp->Gcheck); |
| 5004 | # ifdef PERL_GLOBAL_STRUCT_PRIVATE |
| 5005 | free(plvarsp); |
| 5006 | # endif |
| 5007 | #endif |
| 5008 | } |
| 5009 | |
| 5010 | #endif /* PERL_GLOBAL_STRUCT */ |
| 5011 | |
| 5012 | #ifdef PERL_MEM_LOG |
| 5013 | |
| 5014 | #define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128 |
| 5015 | |
| 5016 | Malloc_t |
| 5017 | Perl_mem_log_alloc(const UV n, const UV typesize, const char *typename, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname) |
| 5018 | { |
| 5019 | #ifdef PERL_MEM_LOG_STDERR |
| 5020 | /* We can't use PerlIO for obvious reasons. */ |
| 5021 | char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE]; |
| 5022 | const STRLEN len = my_sprintf(buf, |
| 5023 | "alloc: %s:%d:%s: %"IVdf" %"UVuf |
| 5024 | " %s = %"IVdf": %"UVxf"\n", |
| 5025 | filename, linenumber, funcname, n, typesize, |
| 5026 | typename, n * typesize, PTR2UV(newalloc)); |
| 5027 | PerlLIO_write(2, buf, len)); |
| 5028 | #endif |
| 5029 | return newalloc; |
| 5030 | } |
| 5031 | |
| 5032 | Malloc_t |
| 5033 | Perl_mem_log_realloc(const UV n, const UV typesize, const char *typename, Malloc_t oldalloc, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname) |
| 5034 | { |
| 5035 | #ifdef PERL_MEM_LOG_STDERR |
| 5036 | /* We can't use PerlIO for obvious reasons. */ |
| 5037 | char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE]; |
| 5038 | const STRLEN len = my_sprintf(buf, "realloc: %s:%d:%s: %"IVdf" %"UVuf |
| 5039 | " %s = %"IVdf": %"UVxf" -> %"UVxf"\n", |
| 5040 | filename, linenumber, funcname, n, typesize, |
| 5041 | typename, n * typesize, PTR2UV(oldalloc), |
| 5042 | PTR2UV(newalloc)); |
| 5043 | PerlLIO_write(2, buf, len); |
| 5044 | #endif |
| 5045 | return newalloc; |
| 5046 | } |
| 5047 | |
| 5048 | Malloc_t |
| 5049 | Perl_mem_log_free(Malloc_t oldalloc, const char *filename, const int linenumber, const char *funcname) |
| 5050 | { |
| 5051 | #ifdef PERL_MEM_LOG_STDERR |
| 5052 | /* We can't use PerlIO for obvious reasons. */ |
| 5053 | char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE]; |
| 5054 | const STRLEN len = my_sprintf(buf, "free: %s:%d:%s: %"UVxf"\n", |
| 5055 | filename, linenumber, funcname, |
| 5056 | PTR2UV(oldalloc)); |
| 5057 | PerlLIO_write(2, buf, len); |
| 5058 | #endif |
| 5059 | return oldalloc; |
| 5060 | } |
| 5061 | |
| 5062 | #endif /* PERL_MEM_LOG */ |
| 5063 | |
| 5064 | /* |
| 5065 | =for apidoc my_sprintf |
| 5066 | |
| 5067 | The C library C<sprintf>, wrapped if necessary, to ensure that it will return |
| 5068 | the length of the string written to the buffer. Only rare pre-ANSI systems |
| 5069 | need the wrapper function - usually this is a direct call to C<sprintf>. |
| 5070 | |
| 5071 | =cut |
| 5072 | */ |
| 5073 | #ifndef SPRINTF_RETURNS_STRLEN |
| 5074 | int |
| 5075 | Perl_my_sprintf(char *buffer, const char* pat, ...) |
| 5076 | { |
| 5077 | va_list args; |
| 5078 | va_start(args, pat); |
| 5079 | vsprintf(buffer, pat, args); |
| 5080 | va_end(args); |
| 5081 | return strlen(buffer); |
| 5082 | } |
| 5083 | #endif |
| 5084 | |
| 5085 | void |
| 5086 | Perl_my_clearenv(pTHX) |
| 5087 | { |
| 5088 | dVAR; |
| 5089 | #if ! defined(PERL_MICRO) |
| 5090 | # if defined(PERL_IMPLICIT_SYS) || defined(WIN32) |
| 5091 | PerlEnv_clearenv(); |
| 5092 | # else /* ! (PERL_IMPLICIT_SYS || WIN32) */ |
| 5093 | # if defined(USE_ENVIRON_ARRAY) |
| 5094 | # if defined(USE_ITHREADS) |
| 5095 | /* only the parent thread can clobber the process environment */ |
| 5096 | if (PL_curinterp == aTHX) |
| 5097 | # endif /* USE_ITHREADS */ |
| 5098 | { |
| 5099 | # if ! defined(PERL_USE_SAFE_PUTENV) |
| 5100 | if ( !PL_use_safe_putenv) { |
| 5101 | I32 i; |
| 5102 | if (environ == PL_origenviron) |
| 5103 | environ = (char**)safesysmalloc(sizeof(char*)); |
| 5104 | else |
| 5105 | for (i = 0; environ[i]; i++) |
| 5106 | (void)safesysfree(environ[i]); |
| 5107 | } |
| 5108 | environ[0] = NULL; |
| 5109 | # else /* PERL_USE_SAFE_PUTENV */ |
| 5110 | # if defined(HAS_CLEARENV) |
| 5111 | (void)clearenv(); |
| 5112 | # elif defined(HAS_UNSETENV) |
| 5113 | int bsiz = 80; /* Most envvar names will be shorter than this. */ |
| 5114 | char *buf = (char*)safesysmalloc(bsiz * sizeof(char)); |
| 5115 | while (*environ != NULL) { |
| 5116 | char *e = strchr(*environ, '='); |
| 5117 | int l = e ? e - *environ : strlen(*environ); |
| 5118 | if (bsiz < l + 1) { |
| 5119 | (void)safesysfree(buf); |
| 5120 | bsiz = l + 1; |
| 5121 | buf = (char*)safesysmalloc(bsiz * sizeof(char)); |
| 5122 | } |
| 5123 | strncpy(buf, *environ, l); |
| 5124 | *(buf + l) = '\0'; |
| 5125 | (void)unsetenv(buf); |
| 5126 | } |
| 5127 | (void)safesysfree(buf); |
| 5128 | # else /* ! HAS_CLEARENV && ! HAS_UNSETENV */ |
| 5129 | /* Just null environ and accept the leakage. */ |
| 5130 | *environ = NULL; |
| 5131 | # endif /* HAS_CLEARENV || HAS_UNSETENV */ |
| 5132 | # endif /* ! PERL_USE_SAFE_PUTENV */ |
| 5133 | } |
| 5134 | # endif /* USE_ENVIRON_ARRAY */ |
| 5135 | # endif /* PERL_IMPLICIT_SYS || WIN32 */ |
| 5136 | #endif /* PERL_MICRO */ |
| 5137 | } |
| 5138 | |
| 5139 | /* |
| 5140 | * Local variables: |
| 5141 | * c-indentation-style: bsd |
| 5142 | * c-basic-offset: 4 |
| 5143 | * indent-tabs-mode: t |
| 5144 | * End: |
| 5145 | * |
| 5146 | * ex: set ts=8 sts=4 sw=4 noet: |
| 5147 | */ |