| 1 | /* doio.c |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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 | * Far below them they saw the white waters pour into a foaming bowl, and |
| 13 | * then swirl darkly about a deep oval basin in the rocks, until they found |
| 14 | * their way out again through a narrow gate, and flowed away, fuming and |
| 15 | * chattering, into calmer and more level reaches. |
| 16 | * |
| 17 | * [p.684 of _The Lord of the Rings_, IV/vi: "The Forbidden Pool"] |
| 18 | */ |
| 19 | |
| 20 | /* This file contains functions that do the actual I/O on behalf of ops. |
| 21 | * For example, pp_print() calls the do_print() function in this file for |
| 22 | * each argument needing printing. |
| 23 | */ |
| 24 | |
| 25 | #include "EXTERN.h" |
| 26 | #define PERL_IN_DOIO_C |
| 27 | #include "perl.h" |
| 28 | |
| 29 | #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) |
| 30 | #ifndef HAS_SEM |
| 31 | #include <sys/ipc.h> |
| 32 | #endif |
| 33 | #ifdef HAS_MSG |
| 34 | #include <sys/msg.h> |
| 35 | #endif |
| 36 | #ifdef HAS_SHM |
| 37 | #include <sys/shm.h> |
| 38 | # ifndef HAS_SHMAT_PROTOTYPE |
| 39 | extern Shmat_t shmat (int, char *, int); |
| 40 | # endif |
| 41 | #endif |
| 42 | #endif |
| 43 | |
| 44 | #ifdef I_UTIME |
| 45 | # if defined(_MSC_VER) || defined(__MINGW32__) |
| 46 | # include <sys/utime.h> |
| 47 | # else |
| 48 | # include <utime.h> |
| 49 | # endif |
| 50 | #endif |
| 51 | |
| 52 | #ifdef O_EXCL |
| 53 | # define OPEN_EXCL O_EXCL |
| 54 | #else |
| 55 | # define OPEN_EXCL 0 |
| 56 | #endif |
| 57 | |
| 58 | #define PERL_MODE_MAX 8 |
| 59 | #define PERL_FLAGS_MAX 10 |
| 60 | |
| 61 | #include <signal.h> |
| 62 | |
| 63 | static IO * |
| 64 | S_openn_setup(pTHX_ GV *gv, char *mode, PerlIO **saveifp, PerlIO **saveofp, |
| 65 | int *savefd, char *savetype) |
| 66 | { |
| 67 | IO * const io = GvIOn(gv); |
| 68 | |
| 69 | PERL_ARGS_ASSERT_OPENN_SETUP; |
| 70 | |
| 71 | *saveifp = NULL; |
| 72 | *saveofp = NULL; |
| 73 | *savefd = -1; |
| 74 | *savetype = IoTYPE_CLOSED; |
| 75 | |
| 76 | Zero(mode,sizeof(mode),char); |
| 77 | PL_forkprocess = 1; /* assume true if no fork */ |
| 78 | |
| 79 | /* If currently open - close before we re-open */ |
| 80 | if (IoIFP(io)) { |
| 81 | if (IoTYPE(io) == IoTYPE_STD) { |
| 82 | /* This is a clone of one of STD* handles */ |
| 83 | } |
| 84 | else { |
| 85 | const int old_fd = PerlIO_fileno(IoIFP(io)); |
| 86 | |
| 87 | if (old_fd >= 0 && old_fd <= PL_maxsysfd) { |
| 88 | /* This is one of the original STD* handles */ |
| 89 | *saveifp = IoIFP(io); |
| 90 | *saveofp = IoOFP(io); |
| 91 | *savetype = IoTYPE(io); |
| 92 | *savefd = old_fd; |
| 93 | } |
| 94 | else { |
| 95 | int result; |
| 96 | |
| 97 | if (IoTYPE(io) == IoTYPE_PIPE) |
| 98 | result = PerlProc_pclose(IoIFP(io)); |
| 99 | else if (IoIFP(io) != IoOFP(io)) { |
| 100 | if (IoOFP(io)) { |
| 101 | result = PerlIO_close(IoOFP(io)); |
| 102 | PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ |
| 103 | } |
| 104 | else |
| 105 | result = PerlIO_close(IoIFP(io)); |
| 106 | } |
| 107 | else |
| 108 | result = PerlIO_close(IoIFP(io)); |
| 109 | |
| 110 | if (result == EOF && old_fd > PL_maxsysfd) { |
| 111 | /* Why is this not Perl_warn*() call ? */ |
| 112 | PerlIO_printf(Perl_error_log, |
| 113 | "Warning: unable to close filehandle %"HEKf" properly.\n", |
| 114 | HEKfARG(GvENAME_HEK(gv)) |
| 115 | ); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | IoOFP(io) = IoIFP(io) = NULL; |
| 120 | } |
| 121 | return io; |
| 122 | } |
| 123 | |
| 124 | bool |
| 125 | Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw, |
| 126 | int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp, |
| 127 | I32 num_svs) |
| 128 | { |
| 129 | PERL_ARGS_ASSERT_DO_OPENN; |
| 130 | |
| 131 | if (as_raw) { |
| 132 | /* sysopen style args, i.e. integer mode and permissions */ |
| 133 | |
| 134 | if (num_svs != 0) { |
| 135 | Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld", |
| 136 | (long) num_svs); |
| 137 | } |
| 138 | return do_open_raw(gv, oname, len, rawmode, rawperm); |
| 139 | } |
| 140 | return do_open6(gv, oname, len, supplied_fp, svp, num_svs); |
| 141 | } |
| 142 | |
| 143 | bool |
| 144 | Perl_do_open_raw(pTHX_ GV *gv, const char *oname, STRLEN len, |
| 145 | int rawmode, int rawperm) |
| 146 | { |
| 147 | PerlIO *saveifp; |
| 148 | PerlIO *saveofp; |
| 149 | int savefd; |
| 150 | char savetype; |
| 151 | char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */ |
| 152 | IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype); |
| 153 | int writing = 0; |
| 154 | PerlIO *fp; |
| 155 | |
| 156 | PERL_ARGS_ASSERT_DO_OPEN_RAW; |
| 157 | |
| 158 | /* For ease of blame back to 5.000, keep the existing indenting. */ |
| 159 | { |
| 160 | /* sysopen style args, i.e. integer mode and permissions */ |
| 161 | STRLEN ix = 0; |
| 162 | const int appendtrunc = |
| 163 | 0 |
| 164 | #ifdef O_APPEND /* Not fully portable. */ |
| 165 | |O_APPEND |
| 166 | #endif |
| 167 | #ifdef O_TRUNC /* Not fully portable. */ |
| 168 | |O_TRUNC |
| 169 | #endif |
| 170 | ; |
| 171 | const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc; |
| 172 | int ismodifying; |
| 173 | SV *namesv; |
| 174 | |
| 175 | /* It's not always |
| 176 | |
| 177 | O_RDONLY 0 |
| 178 | O_WRONLY 1 |
| 179 | O_RDWR 2 |
| 180 | |
| 181 | It might be (in OS/390 and Mac OS Classic it is) |
| 182 | |
| 183 | O_WRONLY 1 |
| 184 | O_RDONLY 2 |
| 185 | O_RDWR 3 |
| 186 | |
| 187 | This means that simple & with O_RDWR would look |
| 188 | like O_RDONLY is present. Therefore we have to |
| 189 | be more careful. |
| 190 | */ |
| 191 | if ((ismodifying = (rawmode & modifyingmode))) { |
| 192 | if ((ismodifying & O_WRONLY) == O_WRONLY || |
| 193 | (ismodifying & O_RDWR) == O_RDWR || |
| 194 | (ismodifying & (O_CREAT|appendtrunc))) |
| 195 | TAINT_PROPER("sysopen"); |
| 196 | } |
| 197 | mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */ |
| 198 | |
| 199 | #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE) |
| 200 | rawmode |= O_LARGEFILE; /* Transparently largefiley. */ |
| 201 | #endif |
| 202 | |
| 203 | IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing); |
| 204 | |
| 205 | namesv = newSVpvn_flags(oname, len, SVs_TEMP); |
| 206 | fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv); |
| 207 | } |
| 208 | return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd, |
| 209 | savetype, writing, 0, NULL); |
| 210 | } |
| 211 | |
| 212 | bool |
| 213 | Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len, |
| 214 | PerlIO *supplied_fp, SV **svp, U32 num_svs) |
| 215 | { |
| 216 | PerlIO *saveifp; |
| 217 | PerlIO *saveofp; |
| 218 | int savefd; |
| 219 | char savetype; |
| 220 | char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */ |
| 221 | IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype); |
| 222 | int writing = 0; |
| 223 | PerlIO *fp; |
| 224 | bool was_fdopen = FALSE; |
| 225 | char *type = NULL; |
| 226 | |
| 227 | PERL_ARGS_ASSERT_DO_OPEN6; |
| 228 | |
| 229 | /* For ease of blame back to 5.000, keep the existing indenting. */ |
| 230 | { |
| 231 | /* Regular (non-sys) open */ |
| 232 | char *name; |
| 233 | STRLEN olen = len; |
| 234 | char *tend; |
| 235 | int dodup = 0; |
| 236 | bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0; |
| 237 | |
| 238 | /* Collect default raw/crlf info from the op */ |
| 239 | if (PL_op && PL_op->op_type == OP_OPEN) { |
| 240 | /* set up IO layers */ |
| 241 | const U8 flags = PL_op->op_private; |
| 242 | in_raw = (flags & OPpOPEN_IN_RAW); |
| 243 | in_crlf = (flags & OPpOPEN_IN_CRLF); |
| 244 | out_raw = (flags & OPpOPEN_OUT_RAW); |
| 245 | out_crlf = (flags & OPpOPEN_OUT_CRLF); |
| 246 | } |
| 247 | |
| 248 | type = savepvn(oname, len); |
| 249 | tend = type+len; |
| 250 | SAVEFREEPV(type); |
| 251 | |
| 252 | /* Lose leading and trailing white space */ |
| 253 | while (isSPACE(*type)) |
| 254 | type++; |
| 255 | while (tend > type && isSPACE(tend[-1])) |
| 256 | *--tend = '\0'; |
| 257 | |
| 258 | if (num_svs) { |
| 259 | const char *p; |
| 260 | STRLEN nlen = 0; |
| 261 | /* New style explicit name, type is just mode and layer info */ |
| 262 | #ifdef USE_STDIO |
| 263 | if (SvROK(*svp) && !strchr(oname,'&')) { |
| 264 | if (ckWARN(WARN_IO)) |
| 265 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 266 | "Can't open a reference"); |
| 267 | SETERRNO(EINVAL, LIB_INVARG); |
| 268 | fp = NULL; |
| 269 | goto say_false; |
| 270 | } |
| 271 | #endif /* USE_STDIO */ |
| 272 | p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL; |
| 273 | |
| 274 | if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) { |
| 275 | fp = NULL; |
| 276 | goto say_false; |
| 277 | } |
| 278 | |
| 279 | name = p ? savepvn(p, nlen) : savepvs(""); |
| 280 | |
| 281 | SAVEFREEPV(name); |
| 282 | } |
| 283 | else { |
| 284 | name = type; |
| 285 | len = tend-type; |
| 286 | } |
| 287 | IoTYPE(io) = *type; |
| 288 | if ((*type == IoTYPE_RDWR) && /* scary */ |
| 289 | (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) && |
| 290 | ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) { |
| 291 | TAINT_PROPER("open"); |
| 292 | mode[1] = *type++; |
| 293 | writing = 1; |
| 294 | } |
| 295 | |
| 296 | if (*type == IoTYPE_PIPE) { |
| 297 | if (num_svs) { |
| 298 | if (type[1] != IoTYPE_STD) { |
| 299 | unknown_open_mode: |
| 300 | Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname); |
| 301 | } |
| 302 | type++; |
| 303 | } |
| 304 | do { |
| 305 | type++; |
| 306 | } while (isSPACE(*type)); |
| 307 | if (!num_svs) { |
| 308 | name = type; |
| 309 | len = tend-type; |
| 310 | } |
| 311 | if (*name == '\0') { |
| 312 | /* command is missing 19990114 */ |
| 313 | if (ckWARN(WARN_PIPE)) |
| 314 | Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open"); |
| 315 | errno = EPIPE; |
| 316 | fp = NULL; |
| 317 | goto say_false; |
| 318 | } |
| 319 | if (!(*name == '-' && name[1] == '\0') || num_svs) |
| 320 | TAINT_ENV(); |
| 321 | TAINT_PROPER("piped open"); |
| 322 | if (!num_svs && name[len-1] == '|') { |
| 323 | name[--len] = '\0' ; |
| 324 | if (ckWARN(WARN_PIPE)) |
| 325 | Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe"); |
| 326 | } |
| 327 | mode[0] = 'w'; |
| 328 | writing = 1; |
| 329 | if (out_raw) |
| 330 | mode[1] = 'b'; |
| 331 | else if (out_crlf) |
| 332 | mode[1] = 't'; |
| 333 | if (num_svs > 1) { |
| 334 | fp = PerlProc_popen_list(mode, num_svs, svp); |
| 335 | } |
| 336 | else { |
| 337 | fp = PerlProc_popen(name,mode); |
| 338 | } |
| 339 | if (num_svs) { |
| 340 | if (*type) { |
| 341 | if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { |
| 342 | fp = NULL; |
| 343 | goto say_false; |
| 344 | } |
| 345 | } |
| 346 | } |
| 347 | } /* IoTYPE_PIPE */ |
| 348 | else if (*type == IoTYPE_WRONLY) { |
| 349 | TAINT_PROPER("open"); |
| 350 | type++; |
| 351 | if (*type == IoTYPE_WRONLY) { |
| 352 | /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */ |
| 353 | mode[0] = IoTYPE(io) = IoTYPE_APPEND; |
| 354 | type++; |
| 355 | } |
| 356 | else { |
| 357 | mode[0] = 'w'; |
| 358 | } |
| 359 | writing = 1; |
| 360 | |
| 361 | if (out_raw) |
| 362 | mode[1] = 'b'; |
| 363 | else if (out_crlf) |
| 364 | mode[1] = 't'; |
| 365 | if (*type == '&') { |
| 366 | duplicity: |
| 367 | dodup = PERLIO_DUP_FD; |
| 368 | type++; |
| 369 | if (*type == '=') { |
| 370 | dodup = 0; |
| 371 | type++; |
| 372 | } |
| 373 | if (!num_svs && !*type && supplied_fp) { |
| 374 | /* "<+&" etc. is used by typemaps */ |
| 375 | fp = supplied_fp; |
| 376 | } |
| 377 | else { |
| 378 | PerlIO *that_fp = NULL; |
| 379 | int wanted_fd; |
| 380 | if (num_svs > 1) { |
| 381 | /* diag_listed_as: More than one argument to '%s' open */ |
| 382 | Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io)); |
| 383 | } |
| 384 | while (isSPACE(*type)) |
| 385 | type++; |
| 386 | if (num_svs && ( |
| 387 | SvIOK(*svp) |
| 388 | || (SvPOKp(*svp) && looks_like_number(*svp)) |
| 389 | )) { |
| 390 | wanted_fd = SvUV(*svp); |
| 391 | num_svs = 0; |
| 392 | } |
| 393 | else if (isDIGIT(*type)) { |
| 394 | wanted_fd = grok_atou(type, NULL); |
| 395 | } |
| 396 | else { |
| 397 | const IO* thatio; |
| 398 | if (num_svs) { |
| 399 | thatio = sv_2io(*svp); |
| 400 | } |
| 401 | else { |
| 402 | GV * const thatgv = gv_fetchpvn_flags(type, tend - type, |
| 403 | 0, SVt_PVIO); |
| 404 | thatio = GvIO(thatgv); |
| 405 | } |
| 406 | if (!thatio) { |
| 407 | #ifdef EINVAL |
| 408 | SETERRNO(EINVAL,SS_IVCHAN); |
| 409 | #endif |
| 410 | fp = NULL; |
| 411 | goto say_false; |
| 412 | } |
| 413 | if ((that_fp = IoIFP(thatio))) { |
| 414 | /* Flush stdio buffer before dup. --mjd |
| 415 | * Unfortunately SEEK_CURing 0 seems to |
| 416 | * be optimized away on most platforms; |
| 417 | * only Solaris and Linux seem to flush |
| 418 | * on that. --jhi */ |
| 419 | /* On the other hand, do all platforms |
| 420 | * take gracefully to flushing a read-only |
| 421 | * filehandle? Perhaps we should do |
| 422 | * fsetpos(src)+fgetpos(dst)? --nik */ |
| 423 | PerlIO_flush(that_fp); |
| 424 | wanted_fd = PerlIO_fileno(that_fp); |
| 425 | /* When dup()ing STDIN, STDOUT or STDERR |
| 426 | * explicitly set appropriate access mode */ |
| 427 | if (that_fp == PerlIO_stdout() |
| 428 | || that_fp == PerlIO_stderr()) |
| 429 | IoTYPE(io) = IoTYPE_WRONLY; |
| 430 | else if (that_fp == PerlIO_stdin()) |
| 431 | IoTYPE(io) = IoTYPE_RDONLY; |
| 432 | /* When dup()ing a socket, say result is |
| 433 | * one as well */ |
| 434 | else if (IoTYPE(thatio) == IoTYPE_SOCKET) |
| 435 | IoTYPE(io) = IoTYPE_SOCKET; |
| 436 | } |
| 437 | else |
| 438 | wanted_fd = -1; |
| 439 | } |
| 440 | if (!num_svs) |
| 441 | type = NULL; |
| 442 | if (that_fp) { |
| 443 | fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup); |
| 444 | } |
| 445 | else { |
| 446 | if (dodup) |
| 447 | wanted_fd = PerlLIO_dup(wanted_fd); |
| 448 | else |
| 449 | was_fdopen = TRUE; |
| 450 | if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) { |
| 451 | if (dodup && wanted_fd >= 0) |
| 452 | PerlLIO_close(wanted_fd); |
| 453 | } |
| 454 | } |
| 455 | } |
| 456 | } /* & */ |
| 457 | else { |
| 458 | while (isSPACE(*type)) |
| 459 | type++; |
| 460 | if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { |
| 461 | type++; |
| 462 | fp = PerlIO_stdout(); |
| 463 | IoTYPE(io) = IoTYPE_STD; |
| 464 | if (num_svs > 1) { |
| 465 | /* diag_listed_as: More than one argument to '%s' open */ |
| 466 | Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD); |
| 467 | } |
| 468 | } |
| 469 | else { |
| 470 | if (num_svs) { |
| 471 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); |
| 472 | } |
| 473 | else { |
| 474 | SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); |
| 475 | type = NULL; |
| 476 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv); |
| 477 | } |
| 478 | } |
| 479 | } /* !& */ |
| 480 | if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) |
| 481 | goto unknown_open_mode; |
| 482 | } /* IoTYPE_WRONLY */ |
| 483 | else if (*type == IoTYPE_RDONLY) { |
| 484 | do { |
| 485 | type++; |
| 486 | } while (isSPACE(*type)); |
| 487 | mode[0] = 'r'; |
| 488 | if (in_raw) |
| 489 | mode[1] = 'b'; |
| 490 | else if (in_crlf) |
| 491 | mode[1] = 't'; |
| 492 | if (*type == '&') { |
| 493 | goto duplicity; |
| 494 | } |
| 495 | if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { |
| 496 | type++; |
| 497 | fp = PerlIO_stdin(); |
| 498 | IoTYPE(io) = IoTYPE_STD; |
| 499 | if (num_svs > 1) { |
| 500 | /* diag_listed_as: More than one argument to '%s' open */ |
| 501 | Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD); |
| 502 | } |
| 503 | } |
| 504 | else { |
| 505 | if (num_svs) { |
| 506 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); |
| 507 | } |
| 508 | else { |
| 509 | SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); |
| 510 | type = NULL; |
| 511 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv); |
| 512 | } |
| 513 | } |
| 514 | if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) |
| 515 | goto unknown_open_mode; |
| 516 | } /* IoTYPE_RDONLY */ |
| 517 | else if ((num_svs && /* '-|...' or '...|' */ |
| 518 | type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) || |
| 519 | (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) { |
| 520 | if (num_svs) { |
| 521 | type += 2; /* skip over '-|' */ |
| 522 | } |
| 523 | else { |
| 524 | *--tend = '\0'; |
| 525 | while (tend > type && isSPACE(tend[-1])) |
| 526 | *--tend = '\0'; |
| 527 | for (; isSPACE(*type); type++) |
| 528 | ; |
| 529 | name = type; |
| 530 | len = tend-type; |
| 531 | } |
| 532 | if (*name == '\0') { |
| 533 | /* command is missing 19990114 */ |
| 534 | if (ckWARN(WARN_PIPE)) |
| 535 | Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open"); |
| 536 | errno = EPIPE; |
| 537 | fp = NULL; |
| 538 | goto say_false; |
| 539 | } |
| 540 | if (!(*name == '-' && name[1] == '\0') || num_svs) |
| 541 | TAINT_ENV(); |
| 542 | TAINT_PROPER("piped open"); |
| 543 | mode[0] = 'r'; |
| 544 | |
| 545 | if (in_raw) |
| 546 | mode[1] = 'b'; |
| 547 | else if (in_crlf) |
| 548 | mode[1] = 't'; |
| 549 | |
| 550 | if (num_svs > 1) { |
| 551 | fp = PerlProc_popen_list(mode,num_svs,svp); |
| 552 | } |
| 553 | else { |
| 554 | fp = PerlProc_popen(name,mode); |
| 555 | } |
| 556 | IoTYPE(io) = IoTYPE_PIPE; |
| 557 | if (num_svs) { |
| 558 | while (isSPACE(*type)) |
| 559 | type++; |
| 560 | if (*type) { |
| 561 | if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { |
| 562 | fp = NULL; |
| 563 | goto say_false; |
| 564 | } |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | else { /* layer(Args) */ |
| 569 | if (num_svs) |
| 570 | goto unknown_open_mode; |
| 571 | name = type; |
| 572 | IoTYPE(io) = IoTYPE_RDONLY; |
| 573 | for (; isSPACE(*name); name++) |
| 574 | ; |
| 575 | mode[0] = 'r'; |
| 576 | |
| 577 | if (in_raw) |
| 578 | mode[1] = 'b'; |
| 579 | else if (in_crlf) |
| 580 | mode[1] = 't'; |
| 581 | |
| 582 | if (*name == '-' && name[1] == '\0') { |
| 583 | fp = PerlIO_stdin(); |
| 584 | IoTYPE(io) = IoTYPE_STD; |
| 585 | } |
| 586 | else { |
| 587 | if (num_svs) { |
| 588 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); |
| 589 | } |
| 590 | else { |
| 591 | SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); |
| 592 | type = NULL; |
| 593 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv); |
| 594 | } |
| 595 | } |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | say_false: |
| 600 | return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd, |
| 601 | savetype, writing, was_fdopen, type); |
| 602 | } |
| 603 | |
| 604 | /* Yes, this is ugly, but it's private, and I don't see a cleaner way to |
| 605 | simplify the two-headed public interface of do_openn. */ |
| 606 | static bool |
| 607 | S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname, |
| 608 | PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype, |
| 609 | int writing, bool was_fdopen, const char *type) |
| 610 | { |
| 611 | int fd; |
| 612 | |
| 613 | PERL_ARGS_ASSERT_OPENN_CLEANUP; |
| 614 | |
| 615 | if (!fp) { |
| 616 | if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE) |
| 617 | && should_warn_nl(oname) |
| 618 | |
| 619 | ) |
| 620 | { |
| 621 | GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */ |
| 622 | Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open"); |
| 623 | GCC_DIAG_RESTORE; |
| 624 | } |
| 625 | goto say_false; |
| 626 | } |
| 627 | |
| 628 | if (ckWARN(WARN_IO)) { |
| 629 | if ((IoTYPE(io) == IoTYPE_RDONLY) && |
| 630 | (fp == PerlIO_stdout() || fp == PerlIO_stderr())) { |
| 631 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 632 | "Filehandle STD%s reopened as %"HEKf |
| 633 | " only for input", |
| 634 | ((fp == PerlIO_stdout()) ? "OUT" : "ERR"), |
| 635 | HEKfARG(GvENAME_HEK(gv))); |
| 636 | } |
| 637 | else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) { |
| 638 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 639 | "Filehandle STDIN reopened as %"HEKf" only for output", |
| 640 | HEKfARG(GvENAME_HEK(gv)) |
| 641 | ); |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | fd = PerlIO_fileno(fp); |
| 646 | /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no |
| 647 | * fd assume it isn't a socket - this covers PerlIO::scalar - |
| 648 | * otherwise unless we "know" the type probe for socket-ness. |
| 649 | */ |
| 650 | if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) { |
| 651 | if (PerlLIO_fstat(fd,&PL_statbuf) < 0) { |
| 652 | /* If PerlIO claims to have fd we had better be able to fstat() it. */ |
| 653 | (void) PerlIO_close(fp); |
| 654 | goto say_false; |
| 655 | } |
| 656 | #ifndef PERL_MICRO |
| 657 | if (S_ISSOCK(PL_statbuf.st_mode)) |
| 658 | IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */ |
| 659 | #ifdef HAS_SOCKET |
| 660 | else if ( |
| 661 | !(PL_statbuf.st_mode & S_IFMT) |
| 662 | && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */ |
| 663 | && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */ |
| 664 | ) { /* on OS's that return 0 on fstat()ed pipe */ |
| 665 | char tmpbuf[256]; |
| 666 | Sock_size_t buflen = sizeof tmpbuf; |
| 667 | if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0 |
| 668 | || errno != ENOTSOCK) |
| 669 | IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */ |
| 670 | /* but some return 0 for streams too, sigh */ |
| 671 | } |
| 672 | #endif /* HAS_SOCKET */ |
| 673 | #endif /* !PERL_MICRO */ |
| 674 | } |
| 675 | |
| 676 | /* Eeek - FIXME !!! |
| 677 | * If this is a standard handle we discard all the layer stuff |
| 678 | * and just dup the fd into whatever was on the handle before ! |
| 679 | */ |
| 680 | |
| 681 | if (saveifp) { /* must use old fp? */ |
| 682 | /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR |
| 683 | then dup the new fileno down |
| 684 | */ |
| 685 | if (saveofp) { |
| 686 | PerlIO_flush(saveofp); /* emulate PerlIO_close() */ |
| 687 | if (saveofp != saveifp) { /* was a socket? */ |
| 688 | PerlIO_close(saveofp); |
| 689 | } |
| 690 | } |
| 691 | if (savefd != fd) { |
| 692 | /* Still a small can-of-worms here if (say) PerlIO::scalar |
| 693 | is assigned to (say) STDOUT - for now let dup2() fail |
| 694 | and provide the error |
| 695 | */ |
| 696 | if (fd < 0) { |
| 697 | SETERRNO(EBADF,RMS_IFI); |
| 698 | goto say_false; |
| 699 | } else if (PerlLIO_dup2(fd, savefd) < 0) { |
| 700 | (void)PerlIO_close(fp); |
| 701 | goto say_false; |
| 702 | } |
| 703 | #ifdef VMS |
| 704 | if (savefd != PerlIO_fileno(PerlIO_stdin())) { |
| 705 | char newname[FILENAME_MAX+1]; |
| 706 | if (PerlIO_getname(fp, newname)) { |
| 707 | if (fd == PerlIO_fileno(PerlIO_stdout())) |
| 708 | vmssetuserlnm("SYS$OUTPUT", newname); |
| 709 | if (fd == PerlIO_fileno(PerlIO_stderr())) |
| 710 | vmssetuserlnm("SYS$ERROR", newname); |
| 711 | } |
| 712 | } |
| 713 | #endif |
| 714 | |
| 715 | #if !defined(WIN32) |
| 716 | /* PL_fdpid isn't used on Windows, so avoid this useless work. |
| 717 | * XXX Probably the same for a lot of other places. */ |
| 718 | { |
| 719 | Pid_t pid; |
| 720 | SV *sv; |
| 721 | |
| 722 | sv = *av_fetch(PL_fdpid,fd,TRUE); |
| 723 | SvUPGRADE(sv, SVt_IV); |
| 724 | pid = SvIVX(sv); |
| 725 | SvIV_set(sv, 0); |
| 726 | sv = *av_fetch(PL_fdpid,savefd,TRUE); |
| 727 | SvUPGRADE(sv, SVt_IV); |
| 728 | SvIV_set(sv, pid); |
| 729 | } |
| 730 | #endif |
| 731 | |
| 732 | if (was_fdopen) { |
| 733 | /* need to close fp without closing underlying fd */ |
| 734 | int ofd = PerlIO_fileno(fp); |
| 735 | int dupfd = ofd >= 0 ? PerlLIO_dup(ofd) : -1; |
| 736 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 737 | /* Assume if we have F_SETFD we have F_GETFD */ |
| 738 | int coe = ofd >= 0 ? fcntl(ofd, F_GETFD) : -1; |
| 739 | if (coe < 0) { |
| 740 | if (dupfd >= 0) |
| 741 | PerlLIO_close(dupfd); |
| 742 | goto say_false; |
| 743 | } |
| 744 | #endif |
| 745 | if (ofd < 0 || dupfd < 0) { |
| 746 | if (dupfd >= 0) |
| 747 | PerlLIO_close(dupfd); |
| 748 | goto say_false; |
| 749 | } |
| 750 | PerlIO_close(fp); |
| 751 | PerlLIO_dup2(dupfd, ofd); |
| 752 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 753 | /* The dup trick has lost close-on-exec on ofd */ |
| 754 | fcntl(ofd,F_SETFD, coe); |
| 755 | #endif |
| 756 | PerlLIO_close(dupfd); |
| 757 | } |
| 758 | else |
| 759 | PerlIO_close(fp); |
| 760 | } |
| 761 | fp = saveifp; |
| 762 | PerlIO_clearerr(fp); |
| 763 | fd = PerlIO_fileno(fp); |
| 764 | } |
| 765 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 766 | if (fd >= 0) { |
| 767 | if (fcntl(fd, F_SETFD, fd > PL_maxsysfd) < 0) { |
| 768 | PerlLIO_close(fd); |
| 769 | goto say_false; |
| 770 | } |
| 771 | } |
| 772 | #endif |
| 773 | IoIFP(io) = fp; |
| 774 | |
| 775 | IoFLAGS(io) &= ~IOf_NOLINE; |
| 776 | if (writing) { |
| 777 | if (IoTYPE(io) == IoTYPE_SOCKET |
| 778 | || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) { |
| 779 | char *s = mode; |
| 780 | if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC) |
| 781 | s++; |
| 782 | *s = 'w'; |
| 783 | if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) { |
| 784 | PerlIO_close(fp); |
| 785 | goto say_false; |
| 786 | } |
| 787 | } |
| 788 | else |
| 789 | IoOFP(io) = fp; |
| 790 | } |
| 791 | return TRUE; |
| 792 | |
| 793 | say_false: |
| 794 | IoIFP(io) = saveifp; |
| 795 | IoOFP(io) = saveofp; |
| 796 | IoTYPE(io) = savetype; |
| 797 | return FALSE; |
| 798 | } |
| 799 | |
| 800 | PerlIO * |
| 801 | Perl_nextargv(pTHX_ GV *gv, bool nomagicopen) |
| 802 | { |
| 803 | IO * const io = GvIOp(gv); |
| 804 | |
| 805 | PERL_ARGS_ASSERT_NEXTARGV; |
| 806 | |
| 807 | if (!PL_argvoutgv) |
| 808 | PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); |
| 809 | if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) { |
| 810 | IoFLAGS(io) &= ~IOf_START; |
| 811 | if (PL_inplace) { |
| 812 | assert(PL_defoutgv); |
| 813 | Perl_av_create_and_push(aTHX_ &PL_argvout_stack, |
| 814 | SvREFCNT_inc_simple_NN(PL_defoutgv)); |
| 815 | } |
| 816 | } |
| 817 | if (PL_filemode & (S_ISUID|S_ISGID)) { |
| 818 | PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */ |
| 819 | #ifdef HAS_FCHMOD |
| 820 | if (PL_lastfd != -1) |
| 821 | (void)fchmod(PL_lastfd,PL_filemode); |
| 822 | #else |
| 823 | (void)PerlLIO_chmod(PL_oldname,PL_filemode); |
| 824 | #endif |
| 825 | } |
| 826 | PL_lastfd = -1; |
| 827 | PL_filemode = 0; |
| 828 | if (!GvAV(gv)) |
| 829 | return NULL; |
| 830 | while (av_tindex(GvAV(gv)) >= 0) { |
| 831 | STRLEN oldlen; |
| 832 | SV *const sv = av_shift(GvAV(gv)); |
| 833 | SAVEFREESV(sv); |
| 834 | SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */ |
| 835 | sv_setsv(GvSVn(gv),sv); |
| 836 | SvSETMAGIC(GvSV(gv)); |
| 837 | PL_oldname = SvPVx(GvSV(gv), oldlen); |
| 838 | if (LIKELY(!PL_inplace)) { |
| 839 | if (nomagicopen |
| 840 | ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1) |
| 841 | : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0) |
| 842 | ) { |
| 843 | return IoIFP(GvIOp(gv)); |
| 844 | } |
| 845 | } |
| 846 | else { |
| 847 | /* This very long block ends with return IoIFP(GvIOp(gv)); |
| 848 | Both this block and the block above fall through on open |
| 849 | failure to the warning code, and then the while loop above tries |
| 850 | the next entry. */ |
| 851 | if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0)) { |
| 852 | #ifndef FLEXFILENAMES |
| 853 | int filedev; |
| 854 | int fileino; |
| 855 | #endif |
| 856 | Uid_t fileuid; |
| 857 | Gid_t filegid; |
| 858 | |
| 859 | TAINT_PROPER("inplace open"); |
| 860 | if (oldlen == 1 && *PL_oldname == '-') { |
| 861 | setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, |
| 862 | SVt_PVIO)); |
| 863 | return IoIFP(GvIOp(gv)); |
| 864 | } |
| 865 | #ifndef FLEXFILENAMES |
| 866 | filedev = PL_statbuf.st_dev; |
| 867 | fileino = PL_statbuf.st_ino; |
| 868 | #endif |
| 869 | PL_filemode = PL_statbuf.st_mode; |
| 870 | fileuid = PL_statbuf.st_uid; |
| 871 | filegid = PL_statbuf.st_gid; |
| 872 | if (!S_ISREG(PL_filemode)) { |
| 873 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 874 | "Can't do inplace edit: %s is not a regular file", |
| 875 | PL_oldname ); |
| 876 | do_close(gv,FALSE); |
| 877 | continue; |
| 878 | } |
| 879 | if (*PL_inplace && strNE(PL_inplace, "*")) { |
| 880 | const char *star = strchr(PL_inplace, '*'); |
| 881 | if (star) { |
| 882 | const char *begin = PL_inplace; |
| 883 | sv_setpvs(sv, ""); |
| 884 | do { |
| 885 | sv_catpvn(sv, begin, star - begin); |
| 886 | sv_catpvn(sv, PL_oldname, oldlen); |
| 887 | begin = ++star; |
| 888 | } while ((star = strchr(begin, '*'))); |
| 889 | if (*begin) |
| 890 | sv_catpv(sv,begin); |
| 891 | } |
| 892 | else { |
| 893 | sv_catpv(sv,PL_inplace); |
| 894 | } |
| 895 | #ifndef FLEXFILENAMES |
| 896 | if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0 |
| 897 | && PL_statbuf.st_dev == filedev |
| 898 | && PL_statbuf.st_ino == fileino) |
| 899 | #ifdef DJGPP |
| 900 | || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0) |
| 901 | #endif |
| 902 | ) |
| 903 | { |
| 904 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 905 | "Can't do inplace edit: %"SVf" would not be unique", |
| 906 | SVfARG(sv)); |
| 907 | do_close(gv,FALSE); |
| 908 | continue; |
| 909 | } |
| 910 | #endif |
| 911 | #ifdef HAS_RENAME |
| 912 | #if !defined(DOSISH) && !defined(__CYGWIN__) |
| 913 | if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) { |
| 914 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 915 | "Can't rename %s to %"SVf": %s, skipping file", |
| 916 | PL_oldname, SVfARG(sv), Strerror(errno)); |
| 917 | do_close(gv,FALSE); |
| 918 | continue; |
| 919 | } |
| 920 | #else |
| 921 | do_close(gv,FALSE); |
| 922 | (void)PerlLIO_unlink(SvPVX_const(sv)); |
| 923 | (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv)); |
| 924 | do_open_raw(gv, SvPVX_const(sv), SvCUR(sv), O_RDONLY, 0); |
| 925 | #endif /* DOSISH */ |
| 926 | #else |
| 927 | (void)UNLINK(SvPVX_const(sv)); |
| 928 | if (link(PL_oldname,SvPVX_const(sv)) < 0) { |
| 929 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 930 | "Can't rename %s to %"SVf": %s, skipping file", |
| 931 | PL_oldname, SVfARG(sv), Strerror(errno) ); |
| 932 | do_close(gv,FALSE); |
| 933 | continue; |
| 934 | } |
| 935 | (void)UNLINK(PL_oldname); |
| 936 | #endif |
| 937 | } |
| 938 | else { |
| 939 | #if !defined(DOSISH) && !defined(AMIGAOS) |
| 940 | # ifndef VMS /* Don't delete; use automatic file versioning */ |
| 941 | if (UNLINK(PL_oldname) < 0) { |
| 942 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 943 | "Can't remove %s: %s, skipping file", |
| 944 | PL_oldname, Strerror(errno) ); |
| 945 | do_close(gv,FALSE); |
| 946 | continue; |
| 947 | } |
| 948 | # endif |
| 949 | #else |
| 950 | Perl_croak(aTHX_ "Can't do inplace edit without backup"); |
| 951 | #endif |
| 952 | } |
| 953 | |
| 954 | sv_setpvn(sv,PL_oldname,oldlen); |
| 955 | SETERRNO(0,0); /* in case sprintf set errno */ |
| 956 | if (!Perl_do_open_raw(aTHX_ PL_argvoutgv, SvPVX_const(sv), |
| 957 | SvCUR(sv), |
| 958 | #ifdef VMS |
| 959 | O_WRONLY|O_CREAT|O_TRUNC, 0 |
| 960 | #else |
| 961 | O_WRONLY|O_CREAT|OPEN_EXCL, 0600 |
| 962 | #endif |
| 963 | )) { |
| 964 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s", |
| 965 | PL_oldname, Strerror(errno) ); |
| 966 | do_close(gv,FALSE); |
| 967 | continue; |
| 968 | } |
| 969 | setdefout(PL_argvoutgv); |
| 970 | PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv))); |
| 971 | if (PL_lastfd >= 0) { |
| 972 | (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf); |
| 973 | #ifdef HAS_FCHMOD |
| 974 | (void)fchmod(PL_lastfd,PL_filemode); |
| 975 | #else |
| 976 | (void)PerlLIO_chmod(PL_oldname,PL_filemode); |
| 977 | #endif |
| 978 | if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) { |
| 979 | /* XXX silently ignore failures */ |
| 980 | #ifdef HAS_FCHOWN |
| 981 | PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid)); |
| 982 | #else |
| 983 | #ifdef HAS_CHOWN |
| 984 | PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid)); |
| 985 | #endif |
| 986 | #endif |
| 987 | } |
| 988 | } |
| 989 | return IoIFP(GvIOp(gv)); |
| 990 | } |
| 991 | } /* successful do_open_raw(), PL_inplace non-NULL */ |
| 992 | |
| 993 | if (ckWARN_d(WARN_INPLACE)) { |
| 994 | const int eno = errno; |
| 995 | if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0 |
| 996 | && !S_ISREG(PL_statbuf.st_mode)) { |
| 997 | Perl_warner(aTHX_ packWARN(WARN_INPLACE), |
| 998 | "Can't do inplace edit: %s is not a regular file", |
| 999 | PL_oldname); |
| 1000 | } |
| 1001 | else { |
| 1002 | Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s", |
| 1003 | PL_oldname, Strerror(eno)); |
| 1004 | } |
| 1005 | } |
| 1006 | } |
| 1007 | if (io && (IoFLAGS(io) & IOf_ARGV)) |
| 1008 | IoFLAGS(io) |= IOf_START; |
| 1009 | if (PL_inplace) { |
| 1010 | (void)do_close(PL_argvoutgv,FALSE); |
| 1011 | if (io && (IoFLAGS(io) & IOf_ARGV) |
| 1012 | && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0) |
| 1013 | { |
| 1014 | GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack)); |
| 1015 | setdefout(oldout); |
| 1016 | SvREFCNT_dec_NN(oldout); |
| 1017 | return NULL; |
| 1018 | } |
| 1019 | setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO)); |
| 1020 | } |
| 1021 | return NULL; |
| 1022 | } |
| 1023 | |
| 1024 | /* explicit renamed to avoid C++ conflict -- kja */ |
| 1025 | bool |
| 1026 | Perl_do_close(pTHX_ GV *gv, bool not_implicit) |
| 1027 | { |
| 1028 | bool retval; |
| 1029 | IO *io; |
| 1030 | |
| 1031 | if (!gv) |
| 1032 | gv = PL_argvgv; |
| 1033 | if (!gv || !isGV_with_GP(gv)) { |
| 1034 | if (not_implicit) |
| 1035 | SETERRNO(EBADF,SS_IVCHAN); |
| 1036 | return FALSE; |
| 1037 | } |
| 1038 | io = GvIO(gv); |
| 1039 | if (!io) { /* never opened */ |
| 1040 | if (not_implicit) { |
| 1041 | report_evil_fh(gv); |
| 1042 | SETERRNO(EBADF,SS_IVCHAN); |
| 1043 | } |
| 1044 | return FALSE; |
| 1045 | } |
| 1046 | retval = io_close(io, NULL, not_implicit, FALSE); |
| 1047 | if (not_implicit) { |
| 1048 | IoLINES(io) = 0; |
| 1049 | IoPAGE(io) = 0; |
| 1050 | IoLINES_LEFT(io) = IoPAGE_LEN(io); |
| 1051 | } |
| 1052 | IoTYPE(io) = IoTYPE_CLOSED; |
| 1053 | return retval; |
| 1054 | } |
| 1055 | |
| 1056 | bool |
| 1057 | Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail) |
| 1058 | { |
| 1059 | bool retval = FALSE; |
| 1060 | |
| 1061 | PERL_ARGS_ASSERT_IO_CLOSE; |
| 1062 | |
| 1063 | if (IoIFP(io)) { |
| 1064 | if (IoTYPE(io) == IoTYPE_PIPE) { |
| 1065 | const int status = PerlProc_pclose(IoIFP(io)); |
| 1066 | if (not_implicit) { |
| 1067 | STATUS_NATIVE_CHILD_SET(status); |
| 1068 | retval = (STATUS_UNIX == 0); |
| 1069 | } |
| 1070 | else { |
| 1071 | retval = (status != -1); |
| 1072 | } |
| 1073 | } |
| 1074 | else if (IoTYPE(io) == IoTYPE_STD) |
| 1075 | retval = TRUE; |
| 1076 | else { |
| 1077 | if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */ |
| 1078 | const bool prev_err = PerlIO_error(IoOFP(io)); |
| 1079 | #ifdef USE_PERLIO |
| 1080 | if (prev_err) |
| 1081 | PerlIO_restore_errno(IoOFP(io)); |
| 1082 | #endif |
| 1083 | retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err); |
| 1084 | PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ |
| 1085 | } |
| 1086 | else { |
| 1087 | const bool prev_err = PerlIO_error(IoIFP(io)); |
| 1088 | #ifdef USE_PERLIO |
| 1089 | if (prev_err) |
| 1090 | PerlIO_restore_errno(IoIFP(io)); |
| 1091 | #endif |
| 1092 | retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err); |
| 1093 | } |
| 1094 | } |
| 1095 | IoOFP(io) = IoIFP(io) = NULL; |
| 1096 | |
| 1097 | if (warn_on_fail && !retval) { |
| 1098 | if (gv) |
| 1099 | Perl_ck_warner_d(aTHX_ packWARN(WARN_IO), |
| 1100 | "Warning: unable to close filehandle %" |
| 1101 | HEKf" properly: %"SVf, |
| 1102 | GvNAME_HEK(gv), get_sv("!",GV_ADD)); |
| 1103 | else |
| 1104 | Perl_ck_warner_d(aTHX_ packWARN(WARN_IO), |
| 1105 | "Warning: unable to close filehandle " |
| 1106 | "properly: %"SVf, |
| 1107 | get_sv("!",GV_ADD)); |
| 1108 | } |
| 1109 | } |
| 1110 | else if (not_implicit) { |
| 1111 | SETERRNO(EBADF,SS_IVCHAN); |
| 1112 | } |
| 1113 | |
| 1114 | return retval; |
| 1115 | } |
| 1116 | |
| 1117 | bool |
| 1118 | Perl_do_eof(pTHX_ GV *gv) |
| 1119 | { |
| 1120 | IO * const io = GvIO(gv); |
| 1121 | |
| 1122 | PERL_ARGS_ASSERT_DO_EOF; |
| 1123 | |
| 1124 | if (!io) |
| 1125 | return TRUE; |
| 1126 | else if (IoTYPE(io) == IoTYPE_WRONLY) |
| 1127 | report_wrongway_fh(gv, '>'); |
| 1128 | |
| 1129 | while (IoIFP(io)) { |
| 1130 | if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */ |
| 1131 | if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */ |
| 1132 | return FALSE; /* this is the most usual case */ |
| 1133 | } |
| 1134 | |
| 1135 | { |
| 1136 | /* getc and ungetc can stomp on errno */ |
| 1137 | dSAVE_ERRNO; |
| 1138 | const int ch = PerlIO_getc(IoIFP(io)); |
| 1139 | if (ch != EOF) { |
| 1140 | (void)PerlIO_ungetc(IoIFP(io),ch); |
| 1141 | RESTORE_ERRNO; |
| 1142 | return FALSE; |
| 1143 | } |
| 1144 | RESTORE_ERRNO; |
| 1145 | } |
| 1146 | |
| 1147 | if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) { |
| 1148 | if (PerlIO_get_cnt(IoIFP(io)) < -1) |
| 1149 | PerlIO_set_cnt(IoIFP(io),-1); |
| 1150 | } |
| 1151 | if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */ |
| 1152 | if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */ |
| 1153 | return TRUE; |
| 1154 | } |
| 1155 | else |
| 1156 | return TRUE; /* normal fp, definitely end of file */ |
| 1157 | } |
| 1158 | return TRUE; |
| 1159 | } |
| 1160 | |
| 1161 | Off_t |
| 1162 | Perl_do_tell(pTHX_ GV *gv) |
| 1163 | { |
| 1164 | IO *const io = GvIO(gv); |
| 1165 | PerlIO *fp; |
| 1166 | |
| 1167 | PERL_ARGS_ASSERT_DO_TELL; |
| 1168 | |
| 1169 | if (io && (fp = IoIFP(io))) { |
| 1170 | return PerlIO_tell(fp); |
| 1171 | } |
| 1172 | report_evil_fh(gv); |
| 1173 | SETERRNO(EBADF,RMS_IFI); |
| 1174 | return (Off_t)-1; |
| 1175 | } |
| 1176 | |
| 1177 | bool |
| 1178 | Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence) |
| 1179 | { |
| 1180 | IO *const io = GvIO(gv); |
| 1181 | PerlIO *fp; |
| 1182 | |
| 1183 | if (io && (fp = IoIFP(io))) { |
| 1184 | return PerlIO_seek(fp, pos, whence) >= 0; |
| 1185 | } |
| 1186 | report_evil_fh(gv); |
| 1187 | SETERRNO(EBADF,RMS_IFI); |
| 1188 | return FALSE; |
| 1189 | } |
| 1190 | |
| 1191 | Off_t |
| 1192 | Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence) |
| 1193 | { |
| 1194 | IO *const io = GvIO(gv); |
| 1195 | PerlIO *fp; |
| 1196 | |
| 1197 | PERL_ARGS_ASSERT_DO_SYSSEEK; |
| 1198 | |
| 1199 | if (io && (fp = IoIFP(io))) { |
| 1200 | int fd = PerlIO_fileno(fp); |
| 1201 | if (fd >= 0) { |
| 1202 | return PerlLIO_lseek(fd, pos, whence); |
| 1203 | } |
| 1204 | } |
| 1205 | report_evil_fh(gv); |
| 1206 | SETERRNO(EBADF,RMS_IFI); |
| 1207 | return (Off_t)-1; |
| 1208 | } |
| 1209 | |
| 1210 | int |
| 1211 | Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len) |
| 1212 | { |
| 1213 | int mode = O_BINARY; |
| 1214 | PERL_UNUSED_CONTEXT; |
| 1215 | if (s) { |
| 1216 | while (*s) { |
| 1217 | if (*s == ':') { |
| 1218 | switch (s[1]) { |
| 1219 | case 'r': |
| 1220 | if (s[2] == 'a' && s[3] == 'w' |
| 1221 | && (!s[4] || s[4] == ':' || isSPACE(s[4]))) |
| 1222 | { |
| 1223 | mode = O_BINARY; |
| 1224 | s += 4; |
| 1225 | len -= 4; |
| 1226 | break; |
| 1227 | } |
| 1228 | /* FALLTHROUGH */ |
| 1229 | case 'c': |
| 1230 | if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f' |
| 1231 | && (!s[5] || s[5] == ':' || isSPACE(s[5]))) |
| 1232 | { |
| 1233 | mode = O_TEXT; |
| 1234 | s += 5; |
| 1235 | len -= 5; |
| 1236 | break; |
| 1237 | } |
| 1238 | /* FALLTHROUGH */ |
| 1239 | default: |
| 1240 | goto fail_discipline; |
| 1241 | } |
| 1242 | } |
| 1243 | else if (isSPACE(*s)) { |
| 1244 | ++s; |
| 1245 | --len; |
| 1246 | } |
| 1247 | else { |
| 1248 | const char *end; |
| 1249 | fail_discipline: |
| 1250 | end = strchr(s+1, ':'); |
| 1251 | if (!end) |
| 1252 | end = s+len; |
| 1253 | #ifndef PERLIO_LAYERS |
| 1254 | Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s); |
| 1255 | #else |
| 1256 | len -= end-s; |
| 1257 | s = end; |
| 1258 | #endif |
| 1259 | } |
| 1260 | } |
| 1261 | } |
| 1262 | return mode; |
| 1263 | } |
| 1264 | |
| 1265 | #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) |
| 1266 | I32 |
| 1267 | my_chsize(int fd, Off_t length) |
| 1268 | { |
| 1269 | #ifdef F_FREESP |
| 1270 | /* code courtesy of William Kucharski */ |
| 1271 | #define HAS_CHSIZE |
| 1272 | |
| 1273 | Stat_t filebuf; |
| 1274 | |
| 1275 | if (PerlLIO_fstat(fd, &filebuf) < 0) |
| 1276 | return -1; |
| 1277 | |
| 1278 | if (filebuf.st_size < length) { |
| 1279 | |
| 1280 | /* extend file length */ |
| 1281 | |
| 1282 | if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0) |
| 1283 | return -1; |
| 1284 | |
| 1285 | /* write a "0" byte */ |
| 1286 | |
| 1287 | if ((PerlLIO_write(fd, "", 1)) != 1) |
| 1288 | return -1; |
| 1289 | } |
| 1290 | else { |
| 1291 | /* truncate length */ |
| 1292 | struct flock fl; |
| 1293 | fl.l_whence = 0; |
| 1294 | fl.l_len = 0; |
| 1295 | fl.l_start = length; |
| 1296 | fl.l_type = F_WRLCK; /* write lock on file space */ |
| 1297 | |
| 1298 | /* |
| 1299 | * This relies on the UNDOCUMENTED F_FREESP argument to |
| 1300 | * fcntl(2), which truncates the file so that it ends at the |
| 1301 | * position indicated by fl.l_start. |
| 1302 | * |
| 1303 | * Will minor miracles never cease? |
| 1304 | */ |
| 1305 | |
| 1306 | if (fcntl(fd, F_FREESP, &fl) < 0) |
| 1307 | return -1; |
| 1308 | |
| 1309 | } |
| 1310 | return 0; |
| 1311 | #else |
| 1312 | Perl_croak_nocontext("truncate not implemented"); |
| 1313 | #endif /* F_FREESP */ |
| 1314 | return -1; |
| 1315 | } |
| 1316 | #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */ |
| 1317 | |
| 1318 | bool |
| 1319 | Perl_do_print(pTHX_ SV *sv, PerlIO *fp) |
| 1320 | { |
| 1321 | PERL_ARGS_ASSERT_DO_PRINT; |
| 1322 | |
| 1323 | /* assuming fp is checked earlier */ |
| 1324 | if (!sv) |
| 1325 | return TRUE; |
| 1326 | if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) { |
| 1327 | assert(!SvGMAGICAL(sv)); |
| 1328 | if (SvIsUV(sv)) |
| 1329 | PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv)); |
| 1330 | else |
| 1331 | PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv)); |
| 1332 | return !PerlIO_error(fp); |
| 1333 | } |
| 1334 | else { |
| 1335 | STRLEN len; |
| 1336 | /* Do this first to trigger any overloading. */ |
| 1337 | const char *tmps = SvPV_const(sv, len); |
| 1338 | U8 *tmpbuf = NULL; |
| 1339 | bool happy = TRUE; |
| 1340 | |
| 1341 | if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */ |
| 1342 | if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */ |
| 1343 | /* We don't modify the original scalar. */ |
| 1344 | tmpbuf = bytes_to_utf8((const U8*) tmps, &len); |
| 1345 | tmps = (char *) tmpbuf; |
| 1346 | } |
| 1347 | else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) { |
| 1348 | (void) check_utf8_print((const U8*) tmps, len); |
| 1349 | } |
| 1350 | } /* else stream isn't utf8 */ |
| 1351 | else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to |
| 1352 | convert to bytes */ |
| 1353 | STRLEN tmplen = len; |
| 1354 | bool utf8 = TRUE; |
| 1355 | U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8); |
| 1356 | if (!utf8) { |
| 1357 | |
| 1358 | /* Here, succeeded in downgrading from utf8. Set up to below |
| 1359 | * output the converted value */ |
| 1360 | tmpbuf = result; |
| 1361 | tmps = (char *) tmpbuf; |
| 1362 | len = tmplen; |
| 1363 | } |
| 1364 | else { /* Non-utf8 output stream, but string only representable in |
| 1365 | utf8 */ |
| 1366 | assert((char *)result == tmps); |
| 1367 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), |
| 1368 | "Wide character in %s", |
| 1369 | PL_op ? OP_DESC(PL_op) : "print" |
| 1370 | ); |
| 1371 | /* Could also check that isn't one of the things to avoid |
| 1372 | * in utf8 by using check_utf8_print(), but not doing so, |
| 1373 | * since the stream isn't a UTF8 stream */ |
| 1374 | } |
| 1375 | } |
| 1376 | /* To detect whether the process is about to overstep its |
| 1377 | * filesize limit we would need getrlimit(). We could then |
| 1378 | * also transparently raise the limit with setrlimit() -- |
| 1379 | * but only until the system hard limit/the filesystem limit, |
| 1380 | * at which we would get EPERM. Note that when using buffered |
| 1381 | * io the write failure can be delayed until the flush/close. --jhi */ |
| 1382 | if (len && (PerlIO_write(fp,tmps,len) == 0)) |
| 1383 | happy = FALSE; |
| 1384 | Safefree(tmpbuf); |
| 1385 | return happy ? !PerlIO_error(fp) : FALSE; |
| 1386 | } |
| 1387 | } |
| 1388 | |
| 1389 | I32 |
| 1390 | Perl_my_stat_flags(pTHX_ const U32 flags) |
| 1391 | { |
| 1392 | dSP; |
| 1393 | IO *io; |
| 1394 | GV* gv; |
| 1395 | |
| 1396 | if (PL_op->op_flags & OPf_REF) { |
| 1397 | gv = cGVOP_gv; |
| 1398 | do_fstat: |
| 1399 | if (gv == PL_defgv) |
| 1400 | return PL_laststatval; |
| 1401 | io = GvIO(gv); |
| 1402 | do_fstat_have_io: |
| 1403 | PL_laststype = OP_STAT; |
| 1404 | PL_statgv = gv ? gv : (GV *)io; |
| 1405 | sv_setpvs(PL_statname, ""); |
| 1406 | if (io) { |
| 1407 | if (IoIFP(io)) { |
| 1408 | int fd = PerlIO_fileno(IoIFP(io)); |
| 1409 | if (fd < 0) { |
| 1410 | /* E.g. PerlIO::scalar has no real fd. */ |
| 1411 | return (PL_laststatval = -1); |
| 1412 | } else { |
| 1413 | return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache)); |
| 1414 | } |
| 1415 | } else if (IoDIRP(io)) { |
| 1416 | return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache)); |
| 1417 | } |
| 1418 | } |
| 1419 | PL_laststatval = -1; |
| 1420 | report_evil_fh(gv); |
| 1421 | return -1; |
| 1422 | } |
| 1423 | else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t)) |
| 1424 | == OPpFT_STACKED) |
| 1425 | return PL_laststatval; |
| 1426 | else { |
| 1427 | SV* const sv = TOPs; |
| 1428 | const char *s; |
| 1429 | STRLEN len; |
| 1430 | if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) { |
| 1431 | goto do_fstat; |
| 1432 | } |
| 1433 | else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) { |
| 1434 | io = MUTABLE_IO(SvRV(sv)); |
| 1435 | gv = NULL; |
| 1436 | goto do_fstat_have_io; |
| 1437 | } |
| 1438 | |
| 1439 | s = SvPV_flags_const(sv, len, flags); |
| 1440 | PL_statgv = NULL; |
| 1441 | sv_setpvn(PL_statname, s, len); |
| 1442 | s = SvPVX_const(PL_statname); /* s now NUL-terminated */ |
| 1443 | PL_laststype = OP_STAT; |
| 1444 | PL_laststatval = PerlLIO_stat(s, &PL_statcache); |
| 1445 | if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) { |
| 1446 | GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */ |
| 1447 | Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat"); |
| 1448 | GCC_DIAG_RESTORE; |
| 1449 | } |
| 1450 | return PL_laststatval; |
| 1451 | } |
| 1452 | } |
| 1453 | |
| 1454 | |
| 1455 | I32 |
| 1456 | Perl_my_lstat_flags(pTHX_ const U32 flags) |
| 1457 | { |
| 1458 | static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat"; |
| 1459 | dSP; |
| 1460 | const char *file; |
| 1461 | SV* const sv = TOPs; |
| 1462 | bool isio = FALSE; |
| 1463 | if (PL_op->op_flags & OPf_REF) { |
| 1464 | if (cGVOP_gv == PL_defgv) { |
| 1465 | if (PL_laststype != OP_LSTAT) |
| 1466 | Perl_croak(aTHX_ "%s", no_prev_lstat); |
| 1467 | return PL_laststatval; |
| 1468 | } |
| 1469 | PL_laststatval = -1; |
| 1470 | if (ckWARN(WARN_IO)) { |
| 1471 | /* diag_listed_as: Use of -l on filehandle%s */ |
| 1472 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 1473 | "Use of -l on filehandle %"HEKf, |
| 1474 | HEKfARG(GvENAME_HEK(cGVOP_gv))); |
| 1475 | } |
| 1476 | return -1; |
| 1477 | } |
| 1478 | if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t)) |
| 1479 | == OPpFT_STACKED) { |
| 1480 | if (PL_laststype != OP_LSTAT) |
| 1481 | Perl_croak(aTHX_ "%s", no_prev_lstat); |
| 1482 | return PL_laststatval; |
| 1483 | } |
| 1484 | |
| 1485 | PL_laststype = OP_LSTAT; |
| 1486 | PL_statgv = NULL; |
| 1487 | if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv)) |
| 1488 | || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) ) |
| 1489 | ) |
| 1490 | || isGV_with_GP(sv) |
| 1491 | ) |
| 1492 | && ckWARN(WARN_IO)) { |
| 1493 | if (isio) |
| 1494 | /* diag_listed_as: Use of -l on filehandle%s */ |
| 1495 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 1496 | "Use of -l on filehandle"); |
| 1497 | else |
| 1498 | /* diag_listed_as: Use of -l on filehandle%s */ |
| 1499 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 1500 | "Use of -l on filehandle %"HEKf, |
| 1501 | HEKfARG(GvENAME_HEK((const GV *) |
| 1502 | (SvROK(sv) ? SvRV(sv) : sv)))); |
| 1503 | } |
| 1504 | file = SvPV_flags_const_nolen(sv, flags); |
| 1505 | sv_setpv(PL_statname,file); |
| 1506 | PL_laststatval = PerlLIO_lstat(file,&PL_statcache); |
| 1507 | if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) { |
| 1508 | GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */ |
| 1509 | Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat"); |
| 1510 | GCC_DIAG_RESTORE; |
| 1511 | } |
| 1512 | return PL_laststatval; |
| 1513 | } |
| 1514 | |
| 1515 | static void |
| 1516 | S_exec_failed(pTHX_ const char *cmd, int fd, int do_report) |
| 1517 | { |
| 1518 | const int e = errno; |
| 1519 | PERL_ARGS_ASSERT_EXEC_FAILED; |
| 1520 | if (ckWARN(WARN_EXEC)) |
| 1521 | Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", |
| 1522 | cmd, Strerror(e)); |
| 1523 | if (do_report) { |
| 1524 | /* XXX silently ignore failures */ |
| 1525 | PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int))); |
| 1526 | PerlLIO_close(fd); |
| 1527 | } |
| 1528 | } |
| 1529 | |
| 1530 | bool |
| 1531 | Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp, |
| 1532 | int fd, int do_report) |
| 1533 | { |
| 1534 | dVAR; |
| 1535 | PERL_ARGS_ASSERT_DO_AEXEC5; |
| 1536 | #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__) |
| 1537 | Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system"); |
| 1538 | #else |
| 1539 | if (sp > mark) { |
| 1540 | const char **a; |
| 1541 | const char *tmps = NULL; |
| 1542 | Newx(PL_Argv, sp - mark + 1, const char*); |
| 1543 | a = PL_Argv; |
| 1544 | |
| 1545 | while (++mark <= sp) { |
| 1546 | if (*mark) |
| 1547 | *a++ = SvPV_nolen_const(*mark); |
| 1548 | else |
| 1549 | *a++ = ""; |
| 1550 | } |
| 1551 | *a = NULL; |
| 1552 | if (really) |
| 1553 | tmps = SvPV_nolen_const(really); |
| 1554 | if ((!really && *PL_Argv[0] != '/') || |
| 1555 | (really && *tmps != '/')) /* will execvp use PATH? */ |
| 1556 | TAINT_ENV(); /* testing IFS here is overkill, probably */ |
| 1557 | PERL_FPU_PRE_EXEC |
| 1558 | if (really && *tmps) |
| 1559 | PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv)); |
| 1560 | else |
| 1561 | PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); |
| 1562 | PERL_FPU_POST_EXEC |
| 1563 | S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report); |
| 1564 | } |
| 1565 | do_execfree(); |
| 1566 | #endif |
| 1567 | return FALSE; |
| 1568 | } |
| 1569 | |
| 1570 | void |
| 1571 | Perl_do_execfree(pTHX) |
| 1572 | { |
| 1573 | Safefree(PL_Argv); |
| 1574 | PL_Argv = NULL; |
| 1575 | Safefree(PL_Cmd); |
| 1576 | PL_Cmd = NULL; |
| 1577 | } |
| 1578 | |
| 1579 | #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION |
| 1580 | |
| 1581 | bool |
| 1582 | Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) |
| 1583 | { |
| 1584 | dVAR; |
| 1585 | const char **a; |
| 1586 | char *s; |
| 1587 | char *buf; |
| 1588 | char *cmd; |
| 1589 | /* Make a copy so we can change it */ |
| 1590 | const Size_t cmdlen = strlen(incmd) + 1; |
| 1591 | |
| 1592 | PERL_ARGS_ASSERT_DO_EXEC3; |
| 1593 | |
| 1594 | Newx(buf, cmdlen, char); |
| 1595 | cmd = buf; |
| 1596 | memcpy(cmd, incmd, cmdlen); |
| 1597 | |
| 1598 | while (*cmd && isSPACE(*cmd)) |
| 1599 | cmd++; |
| 1600 | |
| 1601 | /* save an extra exec if possible */ |
| 1602 | |
| 1603 | #ifdef CSH |
| 1604 | { |
| 1605 | char flags[PERL_FLAGS_MAX]; |
| 1606 | if (strnEQ(cmd,PL_cshname,PL_cshlen) && |
| 1607 | strnEQ(cmd+PL_cshlen," -c",3)) { |
| 1608 | my_strlcpy(flags, "-c", PERL_FLAGS_MAX); |
| 1609 | s = cmd+PL_cshlen+3; |
| 1610 | if (*s == 'f') { |
| 1611 | s++; |
| 1612 | my_strlcat(flags, "f", PERL_FLAGS_MAX - 2); |
| 1613 | } |
| 1614 | if (*s == ' ') |
| 1615 | s++; |
| 1616 | if (*s++ == '\'') { |
| 1617 | char * const ncmd = s; |
| 1618 | |
| 1619 | while (*s) |
| 1620 | s++; |
| 1621 | if (s[-1] == '\n') |
| 1622 | *--s = '\0'; |
| 1623 | if (s[-1] == '\'') { |
| 1624 | *--s = '\0'; |
| 1625 | PERL_FPU_PRE_EXEC |
| 1626 | PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL); |
| 1627 | PERL_FPU_POST_EXEC |
| 1628 | *s = '\''; |
| 1629 | S_exec_failed(aTHX_ PL_cshname, fd, do_report); |
| 1630 | Safefree(buf); |
| 1631 | return FALSE; |
| 1632 | } |
| 1633 | } |
| 1634 | } |
| 1635 | } |
| 1636 | #endif /* CSH */ |
| 1637 | |
| 1638 | /* see if there are shell metacharacters in it */ |
| 1639 | |
| 1640 | if (*cmd == '.' && isSPACE(cmd[1])) |
| 1641 | goto doshell; |
| 1642 | |
| 1643 | if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4])) |
| 1644 | goto doshell; |
| 1645 | |
| 1646 | s = cmd; |
| 1647 | while (isWORDCHAR(*s)) |
| 1648 | s++; /* catch VAR=val gizmo */ |
| 1649 | if (*s == '=') |
| 1650 | goto doshell; |
| 1651 | |
| 1652 | for (s = cmd; *s; s++) { |
| 1653 | if (*s != ' ' && !isALPHA(*s) && |
| 1654 | strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) { |
| 1655 | if (*s == '\n' && !s[1]) { |
| 1656 | *s = '\0'; |
| 1657 | break; |
| 1658 | } |
| 1659 | /* handle the 2>&1 construct at the end */ |
| 1660 | if (*s == '>' && s[1] == '&' && s[2] == '1' |
| 1661 | && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2]) |
| 1662 | && (!s[3] || isSPACE(s[3]))) |
| 1663 | { |
| 1664 | const char *t = s + 3; |
| 1665 | |
| 1666 | while (*t && isSPACE(*t)) |
| 1667 | ++t; |
| 1668 | if (!*t && (PerlLIO_dup2(1,2) != -1)) { |
| 1669 | s[-2] = '\0'; |
| 1670 | break; |
| 1671 | } |
| 1672 | } |
| 1673 | doshell: |
| 1674 | PERL_FPU_PRE_EXEC |
| 1675 | PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL); |
| 1676 | PERL_FPU_POST_EXEC |
| 1677 | S_exec_failed(aTHX_ PL_sh_path, fd, do_report); |
| 1678 | Safefree(buf); |
| 1679 | return FALSE; |
| 1680 | } |
| 1681 | } |
| 1682 | |
| 1683 | Newx(PL_Argv, (s - cmd) / 2 + 2, const char*); |
| 1684 | PL_Cmd = savepvn(cmd, s-cmd); |
| 1685 | a = PL_Argv; |
| 1686 | for (s = PL_Cmd; *s;) { |
| 1687 | while (isSPACE(*s)) |
| 1688 | s++; |
| 1689 | if (*s) |
| 1690 | *(a++) = s; |
| 1691 | while (*s && !isSPACE(*s)) |
| 1692 | s++; |
| 1693 | if (*s) |
| 1694 | *s++ = '\0'; |
| 1695 | } |
| 1696 | *a = NULL; |
| 1697 | if (PL_Argv[0]) { |
| 1698 | PERL_FPU_PRE_EXEC |
| 1699 | PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); |
| 1700 | PERL_FPU_POST_EXEC |
| 1701 | if (errno == ENOEXEC) { /* for system V NIH syndrome */ |
| 1702 | do_execfree(); |
| 1703 | goto doshell; |
| 1704 | } |
| 1705 | S_exec_failed(aTHX_ PL_Argv[0], fd, do_report); |
| 1706 | } |
| 1707 | do_execfree(); |
| 1708 | Safefree(buf); |
| 1709 | return FALSE; |
| 1710 | } |
| 1711 | |
| 1712 | #endif /* OS2 || WIN32 */ |
| 1713 | |
| 1714 | #ifdef VMS |
| 1715 | #include <starlet.h> /* for sys$delprc */ |
| 1716 | #endif |
| 1717 | |
| 1718 | I32 |
| 1719 | Perl_apply(pTHX_ I32 type, SV **mark, SV **sp) |
| 1720 | { |
| 1721 | I32 val; |
| 1722 | I32 tot = 0; |
| 1723 | const char *const what = PL_op_name[type]; |
| 1724 | const char *s; |
| 1725 | STRLEN len; |
| 1726 | SV ** const oldmark = mark; |
| 1727 | bool killgp = FALSE; |
| 1728 | |
| 1729 | PERL_ARGS_ASSERT_APPLY; |
| 1730 | |
| 1731 | PERL_UNUSED_VAR(what); /* may not be used depending on compile options */ |
| 1732 | |
| 1733 | /* Doing this ahead of the switch statement preserves the old behaviour, |
| 1734 | where attempting to use kill as a taint test test would fail on |
| 1735 | platforms where kill was not defined. */ |
| 1736 | #ifndef HAS_KILL |
| 1737 | if (type == OP_KILL) |
| 1738 | Perl_die(aTHX_ PL_no_func, what); |
| 1739 | #endif |
| 1740 | #ifndef HAS_CHOWN |
| 1741 | if (type == OP_CHOWN) |
| 1742 | Perl_die(aTHX_ PL_no_func, what); |
| 1743 | #endif |
| 1744 | |
| 1745 | |
| 1746 | #define APPLY_TAINT_PROPER() \ |
| 1747 | STMT_START { \ |
| 1748 | if (TAINT_get) { TAINT_PROPER(what); } \ |
| 1749 | } STMT_END |
| 1750 | |
| 1751 | /* This is a first heuristic; it doesn't catch tainting magic. */ |
| 1752 | if (TAINTING_get) { |
| 1753 | while (++mark <= sp) { |
| 1754 | if (SvTAINTED(*mark)) { |
| 1755 | TAINT; |
| 1756 | break; |
| 1757 | } |
| 1758 | } |
| 1759 | mark = oldmark; |
| 1760 | } |
| 1761 | switch (type) { |
| 1762 | case OP_CHMOD: |
| 1763 | APPLY_TAINT_PROPER(); |
| 1764 | if (++mark <= sp) { |
| 1765 | val = SvIV(*mark); |
| 1766 | APPLY_TAINT_PROPER(); |
| 1767 | tot = sp - mark; |
| 1768 | while (++mark <= sp) { |
| 1769 | GV* gv; |
| 1770 | if ((gv = MAYBE_DEREF_GV(*mark))) { |
| 1771 | if (GvIO(gv) && IoIFP(GvIOp(gv))) { |
| 1772 | #ifdef HAS_FCHMOD |
| 1773 | int fd = PerlIO_fileno(IoIFP(GvIOn(gv))); |
| 1774 | APPLY_TAINT_PROPER(); |
| 1775 | if (fd < 0) { |
| 1776 | SETERRNO(EBADF,RMS_IFI); |
| 1777 | tot--; |
| 1778 | } else if (fchmod(fd, val)) |
| 1779 | tot--; |
| 1780 | #else |
| 1781 | Perl_die(aTHX_ PL_no_func, "fchmod"); |
| 1782 | #endif |
| 1783 | } |
| 1784 | else { |
| 1785 | SETERRNO(EBADF,RMS_IFI); |
| 1786 | tot--; |
| 1787 | } |
| 1788 | } |
| 1789 | else { |
| 1790 | const char *name = SvPV_nomg_const(*mark, len); |
| 1791 | APPLY_TAINT_PROPER(); |
| 1792 | if (!IS_SAFE_PATHNAME(name, len, "chmod") || |
| 1793 | PerlLIO_chmod(name, val)) { |
| 1794 | tot--; |
| 1795 | } |
| 1796 | } |
| 1797 | } |
| 1798 | } |
| 1799 | break; |
| 1800 | #ifdef HAS_CHOWN |
| 1801 | case OP_CHOWN: |
| 1802 | APPLY_TAINT_PROPER(); |
| 1803 | if (sp - mark > 2) { |
| 1804 | I32 val2; |
| 1805 | val = SvIVx(*++mark); |
| 1806 | val2 = SvIVx(*++mark); |
| 1807 | APPLY_TAINT_PROPER(); |
| 1808 | tot = sp - mark; |
| 1809 | while (++mark <= sp) { |
| 1810 | GV* gv; |
| 1811 | if ((gv = MAYBE_DEREF_GV(*mark))) { |
| 1812 | if (GvIO(gv) && IoIFP(GvIOp(gv))) { |
| 1813 | #ifdef HAS_FCHOWN |
| 1814 | int fd = PerlIO_fileno(IoIFP(GvIOn(gv))); |
| 1815 | APPLY_TAINT_PROPER(); |
| 1816 | if (fd < 0) { |
| 1817 | SETERRNO(EBADF,RMS_IFI); |
| 1818 | tot--; |
| 1819 | } else if (fchown(fd, val, val2)) |
| 1820 | tot--; |
| 1821 | #else |
| 1822 | Perl_die(aTHX_ PL_no_func, "fchown"); |
| 1823 | #endif |
| 1824 | } |
| 1825 | else { |
| 1826 | SETERRNO(EBADF,RMS_IFI); |
| 1827 | tot--; |
| 1828 | } |
| 1829 | } |
| 1830 | else { |
| 1831 | const char *name = SvPV_nomg_const(*mark, len); |
| 1832 | APPLY_TAINT_PROPER(); |
| 1833 | if (!IS_SAFE_PATHNAME(name, len, "chown") || |
| 1834 | PerlLIO_chown(name, val, val2)) { |
| 1835 | tot--; |
| 1836 | } |
| 1837 | } |
| 1838 | } |
| 1839 | } |
| 1840 | break; |
| 1841 | #endif |
| 1842 | /* |
| 1843 | XXX Should we make lchown() directly available from perl? |
| 1844 | For now, we'll let Configure test for HAS_LCHOWN, but do |
| 1845 | nothing in the core. |
| 1846 | --AD 5/1998 |
| 1847 | */ |
| 1848 | #ifdef HAS_KILL |
| 1849 | case OP_KILL: |
| 1850 | APPLY_TAINT_PROPER(); |
| 1851 | if (mark == sp) |
| 1852 | break; |
| 1853 | s = SvPVx_const(*++mark, len); |
| 1854 | if (*s == '-' && isALPHA(s[1])) |
| 1855 | { |
| 1856 | s++; |
| 1857 | len--; |
| 1858 | killgp = TRUE; |
| 1859 | } |
| 1860 | if (isALPHA(*s)) { |
| 1861 | if (*s == 'S' && s[1] == 'I' && s[2] == 'G') { |
| 1862 | s += 3; |
| 1863 | len -= 3; |
| 1864 | } |
| 1865 | if ((val = whichsig_pvn(s, len)) < 0) |
| 1866 | Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark)); |
| 1867 | } |
| 1868 | else |
| 1869 | { |
| 1870 | val = SvIV(*mark); |
| 1871 | if (val < 0) |
| 1872 | { |
| 1873 | killgp = TRUE; |
| 1874 | val = -val; |
| 1875 | } |
| 1876 | } |
| 1877 | APPLY_TAINT_PROPER(); |
| 1878 | tot = sp - mark; |
| 1879 | #ifdef VMS |
| 1880 | /* kill() doesn't do process groups (job trees?) under VMS */ |
| 1881 | if (val == SIGKILL) { |
| 1882 | /* Use native sys$delprc() to insure that target process is |
| 1883 | * deleted; supervisor-mode images don't pay attention to |
| 1884 | * CRTL's emulation of Unix-style signals and kill() |
| 1885 | */ |
| 1886 | while (++mark <= sp) { |
| 1887 | I32 proc; |
| 1888 | unsigned long int __vmssts; |
| 1889 | SvGETMAGIC(*mark); |
| 1890 | if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark))) |
| 1891 | Perl_croak(aTHX_ "Can't kill a non-numeric process ID"); |
| 1892 | proc = SvIV_nomg(*mark); |
| 1893 | APPLY_TAINT_PROPER(); |
| 1894 | if (!((__vmssts = sys$delprc(&proc,0)) & 1)) { |
| 1895 | tot--; |
| 1896 | switch (__vmssts) { |
| 1897 | case SS$_NONEXPR: |
| 1898 | case SS$_NOSUCHNODE: |
| 1899 | SETERRNO(ESRCH,__vmssts); |
| 1900 | break; |
| 1901 | case SS$_NOPRIV: |
| 1902 | SETERRNO(EPERM,__vmssts); |
| 1903 | break; |
| 1904 | default: |
| 1905 | SETERRNO(EVMSERR,__vmssts); |
| 1906 | } |
| 1907 | } |
| 1908 | } |
| 1909 | PERL_ASYNC_CHECK(); |
| 1910 | break; |
| 1911 | } |
| 1912 | #endif |
| 1913 | while (++mark <= sp) { |
| 1914 | Pid_t proc; |
| 1915 | SvGETMAGIC(*mark); |
| 1916 | if (!(SvNIOK(*mark) || looks_like_number(*mark))) |
| 1917 | Perl_croak(aTHX_ "Can't kill a non-numeric process ID"); |
| 1918 | proc = SvIV_nomg(*mark); |
| 1919 | APPLY_TAINT_PROPER(); |
| 1920 | #ifdef HAS_KILLPG |
| 1921 | /* use killpg in preference, as the killpg() wrapper for Win32 |
| 1922 | * understands process groups, but the kill() wrapper doesn't */ |
| 1923 | if (killgp ? PerlProc_killpg(proc, val) |
| 1924 | : PerlProc_kill(proc, val)) |
| 1925 | #else |
| 1926 | if (PerlProc_kill(killgp ? -proc: proc, val)) |
| 1927 | #endif |
| 1928 | tot--; |
| 1929 | } |
| 1930 | PERL_ASYNC_CHECK(); |
| 1931 | break; |
| 1932 | #endif |
| 1933 | case OP_UNLINK: |
| 1934 | APPLY_TAINT_PROPER(); |
| 1935 | tot = sp - mark; |
| 1936 | while (++mark <= sp) { |
| 1937 | s = SvPV_const(*mark, len); |
| 1938 | APPLY_TAINT_PROPER(); |
| 1939 | if (!IS_SAFE_PATHNAME(s, len, "unlink")) { |
| 1940 | tot--; |
| 1941 | } |
| 1942 | else if (PL_unsafe) { |
| 1943 | if (UNLINK(s)) |
| 1944 | tot--; |
| 1945 | } |
| 1946 | else { /* don't let root wipe out directories without -U */ |
| 1947 | if (PerlLIO_lstat(s,&PL_statbuf) < 0) |
| 1948 | tot--; |
| 1949 | else if (S_ISDIR(PL_statbuf.st_mode)) { |
| 1950 | tot--; |
| 1951 | SETERRNO(EISDIR, SS_NOPRIV); |
| 1952 | } |
| 1953 | else { |
| 1954 | if (UNLINK(s)) |
| 1955 | tot--; |
| 1956 | } |
| 1957 | } |
| 1958 | } |
| 1959 | break; |
| 1960 | #if defined(HAS_UTIME) || defined(HAS_FUTIMES) |
| 1961 | case OP_UTIME: |
| 1962 | APPLY_TAINT_PROPER(); |
| 1963 | if (sp - mark > 2) { |
| 1964 | #if defined(HAS_FUTIMES) |
| 1965 | struct timeval utbuf[2]; |
| 1966 | void *utbufp = utbuf; |
| 1967 | #elif defined(I_UTIME) || defined(VMS) |
| 1968 | struct utimbuf utbuf; |
| 1969 | struct utimbuf *utbufp = &utbuf; |
| 1970 | #else |
| 1971 | struct { |
| 1972 | Time_t actime; |
| 1973 | Time_t modtime; |
| 1974 | } utbuf; |
| 1975 | void *utbufp = &utbuf; |
| 1976 | #endif |
| 1977 | |
| 1978 | SV* const accessed = *++mark; |
| 1979 | SV* const modified = *++mark; |
| 1980 | |
| 1981 | /* Be like C, and if both times are undefined, let the C |
| 1982 | * library figure out what to do. This usually means |
| 1983 | * "current time". */ |
| 1984 | |
| 1985 | if ( accessed == &PL_sv_undef && modified == &PL_sv_undef ) |
| 1986 | utbufp = NULL; |
| 1987 | else { |
| 1988 | Zero(&utbuf, sizeof utbuf, char); |
| 1989 | #ifdef HAS_FUTIMES |
| 1990 | utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */ |
| 1991 | utbuf[0].tv_usec = 0; |
| 1992 | utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */ |
| 1993 | utbuf[1].tv_usec = 0; |
| 1994 | #elif defined(BIG_TIME) |
| 1995 | utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */ |
| 1996 | utbuf.modtime = (Time_t)SvNV(modified); /* time modified */ |
| 1997 | #else |
| 1998 | utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */ |
| 1999 | utbuf.modtime = (Time_t)SvIV(modified); /* time modified */ |
| 2000 | #endif |
| 2001 | } |
| 2002 | APPLY_TAINT_PROPER(); |
| 2003 | tot = sp - mark; |
| 2004 | while (++mark <= sp) { |
| 2005 | GV* gv; |
| 2006 | if ((gv = MAYBE_DEREF_GV(*mark))) { |
| 2007 | if (GvIO(gv) && IoIFP(GvIOp(gv))) { |
| 2008 | #ifdef HAS_FUTIMES |
| 2009 | int fd = PerlIO_fileno(IoIFP(GvIOn(gv))); |
| 2010 | APPLY_TAINT_PROPER(); |
| 2011 | if (fd < 0) { |
| 2012 | SETERRNO(EBADF,RMS_IFI); |
| 2013 | tot--; |
| 2014 | } else if (futimes(fd, (struct timeval *) utbufp)) |
| 2015 | tot--; |
| 2016 | #else |
| 2017 | Perl_die(aTHX_ PL_no_func, "futimes"); |
| 2018 | #endif |
| 2019 | } |
| 2020 | else { |
| 2021 | tot--; |
| 2022 | } |
| 2023 | } |
| 2024 | else { |
| 2025 | const char * const name = SvPV_nomg_const(*mark, len); |
| 2026 | APPLY_TAINT_PROPER(); |
| 2027 | if (!IS_SAFE_PATHNAME(name, len, "utime")) { |
| 2028 | tot--; |
| 2029 | } |
| 2030 | else |
| 2031 | #ifdef HAS_FUTIMES |
| 2032 | if (utimes(name, (struct timeval *)utbufp)) |
| 2033 | #else |
| 2034 | if (PerlLIO_utime(name, utbufp)) |
| 2035 | #endif |
| 2036 | tot--; |
| 2037 | } |
| 2038 | |
| 2039 | } |
| 2040 | } |
| 2041 | else |
| 2042 | tot = 0; |
| 2043 | break; |
| 2044 | #endif |
| 2045 | } |
| 2046 | return tot; |
| 2047 | |
| 2048 | #undef APPLY_TAINT_PROPER |
| 2049 | } |
| 2050 | |
| 2051 | /* Do the permissions allow some operation? Assumes statcache already set. */ |
| 2052 | #ifndef VMS /* VMS' cando is in vms.c */ |
| 2053 | bool |
| 2054 | Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp) |
| 2055 | /* effective is a flag, true for EUID, or for checking if the effective gid |
| 2056 | * is in the list of groups returned from getgroups(). |
| 2057 | */ |
| 2058 | { |
| 2059 | PERL_ARGS_ASSERT_CANDO; |
| 2060 | PERL_UNUSED_CONTEXT; |
| 2061 | |
| 2062 | #ifdef DOSISH |
| 2063 | /* [Comments and code from Len Reed] |
| 2064 | * MS-DOS "user" is similar to UNIX's "superuser," but can't write |
| 2065 | * to write-protected files. The execute permission bit is set |
| 2066 | * by the Microsoft C library stat() function for the following: |
| 2067 | * .exe files |
| 2068 | * .com files |
| 2069 | * .bat files |
| 2070 | * directories |
| 2071 | * All files and directories are readable. |
| 2072 | * Directories and special files, e.g. "CON", cannot be |
| 2073 | * write-protected. |
| 2074 | * [Comment by Tom Dinger -- a directory can have the write-protect |
| 2075 | * bit set in the file system, but DOS permits changes to |
| 2076 | * the directory anyway. In addition, all bets are off |
| 2077 | * here for networked software, such as Novell and |
| 2078 | * Sun's PC-NFS.] |
| 2079 | */ |
| 2080 | |
| 2081 | /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat |
| 2082 | * too so it will actually look into the files for magic numbers |
| 2083 | */ |
| 2084 | return (mode & statbufp->st_mode) ? TRUE : FALSE; |
| 2085 | |
| 2086 | #else /* ! DOSISH */ |
| 2087 | # ifdef __CYGWIN__ |
| 2088 | if (ingroup(544,effective)) { /* member of Administrators */ |
| 2089 | # else |
| 2090 | if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */ |
| 2091 | # endif |
| 2092 | if (mode == S_IXUSR) { |
| 2093 | if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode)) |
| 2094 | return TRUE; |
| 2095 | } |
| 2096 | else |
| 2097 | return TRUE; /* root reads and writes anything */ |
| 2098 | return FALSE; |
| 2099 | } |
| 2100 | if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) { |
| 2101 | if (statbufp->st_mode & mode) |
| 2102 | return TRUE; /* ok as "user" */ |
| 2103 | } |
| 2104 | else if (ingroup(statbufp->st_gid,effective)) { |
| 2105 | if (statbufp->st_mode & mode >> 3) |
| 2106 | return TRUE; /* ok as "group" */ |
| 2107 | } |
| 2108 | else if (statbufp->st_mode & mode >> 6) |
| 2109 | return TRUE; /* ok as "other" */ |
| 2110 | return FALSE; |
| 2111 | #endif /* ! DOSISH */ |
| 2112 | } |
| 2113 | #endif /* ! VMS */ |
| 2114 | |
| 2115 | static bool |
| 2116 | S_ingroup(pTHX_ Gid_t testgid, bool effective) |
| 2117 | { |
| 2118 | #ifndef PERL_IMPLICIT_SYS |
| 2119 | /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */ |
| 2120 | PERL_UNUSED_CONTEXT; |
| 2121 | #endif |
| 2122 | if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid())) |
| 2123 | return TRUE; |
| 2124 | #ifdef HAS_GETGROUPS |
| 2125 | { |
| 2126 | Groups_t *gary = NULL; |
| 2127 | I32 anum; |
| 2128 | bool rc = FALSE; |
| 2129 | |
| 2130 | anum = getgroups(0, gary); |
| 2131 | if (anum > 0) { |
| 2132 | Newx(gary, anum, Groups_t); |
| 2133 | anum = getgroups(anum, gary); |
| 2134 | while (--anum >= 0) |
| 2135 | if (gary[anum] == testgid) { |
| 2136 | rc = TRUE; |
| 2137 | break; |
| 2138 | } |
| 2139 | |
| 2140 | Safefree(gary); |
| 2141 | } |
| 2142 | return rc; |
| 2143 | } |
| 2144 | #else |
| 2145 | return FALSE; |
| 2146 | #endif |
| 2147 | } |
| 2148 | |
| 2149 | #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) |
| 2150 | |
| 2151 | I32 |
| 2152 | Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp) |
| 2153 | { |
| 2154 | const key_t key = (key_t)SvNVx(*++mark); |
| 2155 | SV *nsv = optype == OP_MSGGET ? NULL : *++mark; |
| 2156 | const I32 flags = SvIVx(*++mark); |
| 2157 | |
| 2158 | PERL_ARGS_ASSERT_DO_IPCGET; |
| 2159 | PERL_UNUSED_ARG(sp); |
| 2160 | |
| 2161 | SETERRNO(0,0); |
| 2162 | switch (optype) |
| 2163 | { |
| 2164 | #ifdef HAS_MSG |
| 2165 | case OP_MSGGET: |
| 2166 | return msgget(key, flags); |
| 2167 | #endif |
| 2168 | #ifdef HAS_SEM |
| 2169 | case OP_SEMGET: |
| 2170 | return semget(key, (int) SvIV(nsv), flags); |
| 2171 | #endif |
| 2172 | #ifdef HAS_SHM |
| 2173 | case OP_SHMGET: |
| 2174 | return shmget(key, (size_t) SvUV(nsv), flags); |
| 2175 | #endif |
| 2176 | #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) |
| 2177 | default: |
| 2178 | /* diag_listed_as: msg%s not implemented */ |
| 2179 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 2180 | #endif |
| 2181 | } |
| 2182 | return -1; /* should never happen */ |
| 2183 | } |
| 2184 | |
| 2185 | I32 |
| 2186 | Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp) |
| 2187 | { |
| 2188 | char *a; |
| 2189 | I32 ret = -1; |
| 2190 | const I32 id = SvIVx(*++mark); |
| 2191 | #ifdef Semctl |
| 2192 | const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0; |
| 2193 | #endif |
| 2194 | const I32 cmd = SvIVx(*++mark); |
| 2195 | SV * const astr = *++mark; |
| 2196 | STRLEN infosize = 0; |
| 2197 | I32 getinfo = (cmd == IPC_STAT); |
| 2198 | |
| 2199 | PERL_ARGS_ASSERT_DO_IPCCTL; |
| 2200 | PERL_UNUSED_ARG(sp); |
| 2201 | |
| 2202 | switch (optype) |
| 2203 | { |
| 2204 | #ifdef HAS_MSG |
| 2205 | case OP_MSGCTL: |
| 2206 | if (cmd == IPC_STAT || cmd == IPC_SET) |
| 2207 | infosize = sizeof(struct msqid_ds); |
| 2208 | break; |
| 2209 | #endif |
| 2210 | #ifdef HAS_SHM |
| 2211 | case OP_SHMCTL: |
| 2212 | if (cmd == IPC_STAT || cmd == IPC_SET) |
| 2213 | infosize = sizeof(struct shmid_ds); |
| 2214 | break; |
| 2215 | #endif |
| 2216 | #ifdef HAS_SEM |
| 2217 | case OP_SEMCTL: |
| 2218 | #ifdef Semctl |
| 2219 | if (cmd == IPC_STAT || cmd == IPC_SET) |
| 2220 | infosize = sizeof(struct semid_ds); |
| 2221 | else if (cmd == GETALL || cmd == SETALL) |
| 2222 | { |
| 2223 | struct semid_ds semds; |
| 2224 | union semun semun; |
| 2225 | #ifdef EXTRA_F_IN_SEMUN_BUF |
| 2226 | semun.buff = &semds; |
| 2227 | #else |
| 2228 | semun.buf = &semds; |
| 2229 | #endif |
| 2230 | getinfo = (cmd == GETALL); |
| 2231 | if (Semctl(id, 0, IPC_STAT, semun) == -1) |
| 2232 | return -1; |
| 2233 | infosize = semds.sem_nsems * sizeof(short); |
| 2234 | /* "short" is technically wrong but much more portable |
| 2235 | than guessing about u_?short(_t)? */ |
| 2236 | } |
| 2237 | #else |
| 2238 | /* diag_listed_as: sem%s not implemented */ |
| 2239 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 2240 | #endif |
| 2241 | break; |
| 2242 | #endif |
| 2243 | #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) |
| 2244 | default: |
| 2245 | /* diag_listed_as: shm%s not implemented */ |
| 2246 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 2247 | #endif |
| 2248 | } |
| 2249 | |
| 2250 | if (infosize) |
| 2251 | { |
| 2252 | if (getinfo) |
| 2253 | { |
| 2254 | SvPV_force_nolen(astr); |
| 2255 | a = SvGROW(astr, infosize+1); |
| 2256 | } |
| 2257 | else |
| 2258 | { |
| 2259 | STRLEN len; |
| 2260 | a = SvPV(astr, len); |
| 2261 | if (len != infosize) |
| 2262 | Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld", |
| 2263 | PL_op_desc[optype], |
| 2264 | (unsigned long)len, |
| 2265 | (long)infosize); |
| 2266 | } |
| 2267 | } |
| 2268 | else |
| 2269 | { |
| 2270 | const IV i = SvIV(astr); |
| 2271 | a = INT2PTR(char *,i); /* ouch */ |
| 2272 | } |
| 2273 | SETERRNO(0,0); |
| 2274 | switch (optype) |
| 2275 | { |
| 2276 | #ifdef HAS_MSG |
| 2277 | case OP_MSGCTL: |
| 2278 | ret = msgctl(id, cmd, (struct msqid_ds *)a); |
| 2279 | break; |
| 2280 | #endif |
| 2281 | #ifdef HAS_SEM |
| 2282 | case OP_SEMCTL: { |
| 2283 | #ifdef Semctl |
| 2284 | union semun unsemds; |
| 2285 | |
| 2286 | if(cmd == SETVAL) { |
| 2287 | unsemds.val = PTR2nat(a); |
| 2288 | } |
| 2289 | else { |
| 2290 | #ifdef EXTRA_F_IN_SEMUN_BUF |
| 2291 | unsemds.buff = (struct semid_ds *)a; |
| 2292 | #else |
| 2293 | unsemds.buf = (struct semid_ds *)a; |
| 2294 | #endif |
| 2295 | } |
| 2296 | ret = Semctl(id, n, cmd, unsemds); |
| 2297 | #else |
| 2298 | /* diag_listed_as: sem%s not implemented */ |
| 2299 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 2300 | #endif |
| 2301 | } |
| 2302 | break; |
| 2303 | #endif |
| 2304 | #ifdef HAS_SHM |
| 2305 | case OP_SHMCTL: |
| 2306 | ret = shmctl(id, cmd, (struct shmid_ds *)a); |
| 2307 | break; |
| 2308 | #endif |
| 2309 | } |
| 2310 | if (getinfo && ret >= 0) { |
| 2311 | SvCUR_set(astr, infosize); |
| 2312 | *SvEND(astr) = '\0'; |
| 2313 | SvSETMAGIC(astr); |
| 2314 | } |
| 2315 | return ret; |
| 2316 | } |
| 2317 | |
| 2318 | I32 |
| 2319 | Perl_do_msgsnd(pTHX_ SV **mark, SV **sp) |
| 2320 | { |
| 2321 | #ifdef HAS_MSG |
| 2322 | STRLEN len; |
| 2323 | const I32 id = SvIVx(*++mark); |
| 2324 | SV * const mstr = *++mark; |
| 2325 | const I32 flags = SvIVx(*++mark); |
| 2326 | const char * const mbuf = SvPV_const(mstr, len); |
| 2327 | const I32 msize = len - sizeof(long); |
| 2328 | |
| 2329 | PERL_ARGS_ASSERT_DO_MSGSND; |
| 2330 | PERL_UNUSED_ARG(sp); |
| 2331 | |
| 2332 | if (msize < 0) |
| 2333 | Perl_croak(aTHX_ "Arg too short for msgsnd"); |
| 2334 | SETERRNO(0,0); |
| 2335 | return msgsnd(id, (struct msgbuf *)mbuf, msize, flags); |
| 2336 | #else |
| 2337 | PERL_UNUSED_ARG(sp); |
| 2338 | PERL_UNUSED_ARG(mark); |
| 2339 | /* diag_listed_as: msg%s not implemented */ |
| 2340 | Perl_croak(aTHX_ "msgsnd not implemented"); |
| 2341 | return -1; |
| 2342 | #endif |
| 2343 | } |
| 2344 | |
| 2345 | I32 |
| 2346 | Perl_do_msgrcv(pTHX_ SV **mark, SV **sp) |
| 2347 | { |
| 2348 | #ifdef HAS_MSG |
| 2349 | char *mbuf; |
| 2350 | long mtype; |
| 2351 | I32 msize, flags, ret; |
| 2352 | const I32 id = SvIVx(*++mark); |
| 2353 | SV * const mstr = *++mark; |
| 2354 | |
| 2355 | PERL_ARGS_ASSERT_DO_MSGRCV; |
| 2356 | PERL_UNUSED_ARG(sp); |
| 2357 | |
| 2358 | /* suppress warning when reading into undef var --jhi */ |
| 2359 | if (! SvOK(mstr)) |
| 2360 | sv_setpvs(mstr, ""); |
| 2361 | msize = SvIVx(*++mark); |
| 2362 | mtype = (long)SvIVx(*++mark); |
| 2363 | flags = SvIVx(*++mark); |
| 2364 | SvPV_force_nolen(mstr); |
| 2365 | mbuf = SvGROW(mstr, sizeof(long)+msize+1); |
| 2366 | |
| 2367 | SETERRNO(0,0); |
| 2368 | ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags); |
| 2369 | if (ret >= 0) { |
| 2370 | SvCUR_set(mstr, sizeof(long)+ret); |
| 2371 | *SvEND(mstr) = '\0'; |
| 2372 | /* who knows who has been playing with this message? */ |
| 2373 | SvTAINTED_on(mstr); |
| 2374 | } |
| 2375 | return ret; |
| 2376 | #else |
| 2377 | PERL_UNUSED_ARG(sp); |
| 2378 | PERL_UNUSED_ARG(mark); |
| 2379 | /* diag_listed_as: msg%s not implemented */ |
| 2380 | Perl_croak(aTHX_ "msgrcv not implemented"); |
| 2381 | return -1; |
| 2382 | #endif |
| 2383 | } |
| 2384 | |
| 2385 | I32 |
| 2386 | Perl_do_semop(pTHX_ SV **mark, SV **sp) |
| 2387 | { |
| 2388 | #ifdef HAS_SEM |
| 2389 | STRLEN opsize; |
| 2390 | const I32 id = SvIVx(*++mark); |
| 2391 | SV * const opstr = *++mark; |
| 2392 | const char * const opbuf = SvPV_const(opstr, opsize); |
| 2393 | |
| 2394 | PERL_ARGS_ASSERT_DO_SEMOP; |
| 2395 | PERL_UNUSED_ARG(sp); |
| 2396 | |
| 2397 | if (opsize < 3 * SHORTSIZE |
| 2398 | || (opsize % (3 * SHORTSIZE))) { |
| 2399 | SETERRNO(EINVAL,LIB_INVARG); |
| 2400 | return -1; |
| 2401 | } |
| 2402 | SETERRNO(0,0); |
| 2403 | /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */ |
| 2404 | { |
| 2405 | const int nsops = opsize / (3 * sizeof (short)); |
| 2406 | int i = nsops; |
| 2407 | short * const ops = (short *) opbuf; |
| 2408 | short *o = ops; |
| 2409 | struct sembuf *temps, *t; |
| 2410 | I32 result; |
| 2411 | |
| 2412 | Newx (temps, nsops, struct sembuf); |
| 2413 | t = temps; |
| 2414 | while (i--) { |
| 2415 | t->sem_num = *o++; |
| 2416 | t->sem_op = *o++; |
| 2417 | t->sem_flg = *o++; |
| 2418 | t++; |
| 2419 | } |
| 2420 | result = semop(id, temps, nsops); |
| 2421 | Safefree(temps); |
| 2422 | return result; |
| 2423 | } |
| 2424 | #else |
| 2425 | /* diag_listed_as: sem%s not implemented */ |
| 2426 | Perl_croak(aTHX_ "semop not implemented"); |
| 2427 | #endif |
| 2428 | } |
| 2429 | |
| 2430 | I32 |
| 2431 | Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp) |
| 2432 | { |
| 2433 | #ifdef HAS_SHM |
| 2434 | char *shm; |
| 2435 | struct shmid_ds shmds; |
| 2436 | const I32 id = SvIVx(*++mark); |
| 2437 | SV * const mstr = *++mark; |
| 2438 | const I32 mpos = SvIVx(*++mark); |
| 2439 | const I32 msize = SvIVx(*++mark); |
| 2440 | |
| 2441 | PERL_ARGS_ASSERT_DO_SHMIO; |
| 2442 | PERL_UNUSED_ARG(sp); |
| 2443 | |
| 2444 | SETERRNO(0,0); |
| 2445 | if (shmctl(id, IPC_STAT, &shmds) == -1) |
| 2446 | return -1; |
| 2447 | if (mpos < 0 || msize < 0 |
| 2448 | || (size_t)mpos + msize > (size_t)shmds.shm_segsz) { |
| 2449 | SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */ |
| 2450 | return -1; |
| 2451 | } |
| 2452 | shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0); |
| 2453 | if (shm == (char *)-1) /* I hate System V IPC, I really do */ |
| 2454 | return -1; |
| 2455 | if (optype == OP_SHMREAD) { |
| 2456 | char *mbuf; |
| 2457 | /* suppress warning when reading into undef var (tchrist 3/Mar/00) */ |
| 2458 | SvGETMAGIC(mstr); |
| 2459 | SvUPGRADE(mstr, SVt_PV); |
| 2460 | if (! SvOK(mstr)) |
| 2461 | sv_setpvs(mstr, ""); |
| 2462 | SvPOK_only(mstr); |
| 2463 | mbuf = SvGROW(mstr, (STRLEN)msize+1); |
| 2464 | |
| 2465 | Copy(shm + mpos, mbuf, msize, char); |
| 2466 | SvCUR_set(mstr, msize); |
| 2467 | *SvEND(mstr) = '\0'; |
| 2468 | SvSETMAGIC(mstr); |
| 2469 | /* who knows who has been playing with this shared memory? */ |
| 2470 | SvTAINTED_on(mstr); |
| 2471 | } |
| 2472 | else { |
| 2473 | STRLEN len; |
| 2474 | |
| 2475 | const char *mbuf = SvPV_const(mstr, len); |
| 2476 | const I32 n = ((I32)len > msize) ? msize : (I32)len; |
| 2477 | Copy(mbuf, shm + mpos, n, char); |
| 2478 | if (n < msize) |
| 2479 | memzero(shm + mpos + n, msize - n); |
| 2480 | } |
| 2481 | return shmdt(shm); |
| 2482 | #else |
| 2483 | /* diag_listed_as: shm%s not implemented */ |
| 2484 | Perl_croak(aTHX_ "shm I/O not implemented"); |
| 2485 | return -1; |
| 2486 | #endif |
| 2487 | } |
| 2488 | |
| 2489 | #endif /* SYSV IPC */ |
| 2490 | |
| 2491 | /* |
| 2492 | =head1 IO Functions |
| 2493 | |
| 2494 | =for apidoc start_glob |
| 2495 | |
| 2496 | Function called by C<do_readline> to spawn a glob (or do the glob inside |
| 2497 | perl on VMS). This code used to be inline, but now perl uses C<File::Glob> |
| 2498 | this glob starter is only used by miniperl during the build process. |
| 2499 | Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up. |
| 2500 | |
| 2501 | =cut |
| 2502 | */ |
| 2503 | |
| 2504 | PerlIO * |
| 2505 | Perl_start_glob (pTHX_ SV *tmpglob, IO *io) |
| 2506 | { |
| 2507 | SV * const tmpcmd = newSV(0); |
| 2508 | PerlIO *fp; |
| 2509 | STRLEN len; |
| 2510 | const char *s = SvPV(tmpglob, len); |
| 2511 | |
| 2512 | PERL_ARGS_ASSERT_START_GLOB; |
| 2513 | |
| 2514 | if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob")) |
| 2515 | return NULL; |
| 2516 | |
| 2517 | ENTER; |
| 2518 | SAVEFREESV(tmpcmd); |
| 2519 | #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */ |
| 2520 | /* since spawning off a process is a real performance hit */ |
| 2521 | |
| 2522 | PerlIO * |
| 2523 | Perl_vms_start_glob |
| 2524 | (pTHX_ SV *tmpglob, |
| 2525 | IO *io); |
| 2526 | |
| 2527 | fp = Perl_vms_start_glob(aTHX_ tmpglob, io); |
| 2528 | |
| 2529 | #else /* !VMS */ |
| 2530 | #ifdef DOSISH |
| 2531 | #ifdef OS2 |
| 2532 | sv_setpv(tmpcmd, "for a in "); |
| 2533 | sv_catsv(tmpcmd, tmpglob); |
| 2534 | sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |"); |
| 2535 | #else |
| 2536 | #ifdef DJGPP |
| 2537 | sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */ |
| 2538 | sv_catsv(tmpcmd, tmpglob); |
| 2539 | #else |
| 2540 | sv_setpv(tmpcmd, "perlglob "); |
| 2541 | sv_catsv(tmpcmd, tmpglob); |
| 2542 | sv_catpv(tmpcmd, " |"); |
| 2543 | #endif /* !DJGPP */ |
| 2544 | #endif /* !OS2 */ |
| 2545 | #else /* !DOSISH */ |
| 2546 | #if defined(CSH) |
| 2547 | sv_setpvn(tmpcmd, PL_cshname, PL_cshlen); |
| 2548 | sv_catpv(tmpcmd, " -cf 'set nonomatch; glob "); |
| 2549 | sv_catsv(tmpcmd, tmpglob); |
| 2550 | sv_catpv(tmpcmd, "' 2>/dev/null |"); |
| 2551 | #else |
| 2552 | sv_setpv(tmpcmd, "echo "); |
| 2553 | sv_catsv(tmpcmd, tmpglob); |
| 2554 | sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|"); |
| 2555 | #endif /* !CSH */ |
| 2556 | #endif /* !DOSISH */ |
| 2557 | { |
| 2558 | GV * const envgv = gv_fetchpvs("ENV", 0, SVt_PVHV); |
| 2559 | SV ** const home = hv_fetchs(GvHV(envgv), "HOME", 0); |
| 2560 | SV ** const path = hv_fetchs(GvHV(envgv), "PATH", 0); |
| 2561 | if (home && *home) SvGETMAGIC(*home); |
| 2562 | if (path && *path) SvGETMAGIC(*path); |
| 2563 | save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV)); |
| 2564 | if (home && *home) SvSETMAGIC(*home); |
| 2565 | if (path && *path) SvSETMAGIC(*path); |
| 2566 | } |
| 2567 | (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd), |
| 2568 | NULL, NULL, 0); |
| 2569 | fp = IoIFP(io); |
| 2570 | #endif /* !VMS */ |
| 2571 | LEAVE; |
| 2572 | |
| 2573 | if (!fp && ckWARN(WARN_GLOB)) { |
| 2574 | Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)", |
| 2575 | Strerror(errno)); |
| 2576 | } |
| 2577 | |
| 2578 | return fp; |
| 2579 | } |
| 2580 | |
| 2581 | /* |
| 2582 | * Local variables: |
| 2583 | * c-indentation-style: bsd |
| 2584 | * c-basic-offset: 4 |
| 2585 | * indent-tabs-mode: nil |
| 2586 | * End: |
| 2587 | * |
| 2588 | * ex: set ts=8 sts=4 sw=4 et: |
| 2589 | */ |