| 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 | void |
| 64 | Perl_setfd_cloexec(int fd) |
| 65 | { |
| 66 | assert(fd >= 0); |
| 67 | #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC) |
| 68 | (void) fcntl(fd, F_SETFD, FD_CLOEXEC); |
| 69 | #endif |
| 70 | } |
| 71 | |
| 72 | void |
| 73 | Perl_setfd_inhexec(int fd) |
| 74 | { |
| 75 | assert(fd >= 0); |
| 76 | #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC) |
| 77 | (void) fcntl(fd, F_SETFD, 0); |
| 78 | #endif |
| 79 | } |
| 80 | |
| 81 | void |
| 82 | Perl_setfd_cloexec_for_nonsysfd(pTHX_ int fd) |
| 83 | { |
| 84 | assert(fd >= 0); |
| 85 | if(fd > PL_maxsysfd) |
| 86 | setfd_cloexec(fd); |
| 87 | } |
| 88 | |
| 89 | void |
| 90 | Perl_setfd_inhexec_for_sysfd(pTHX_ int fd) |
| 91 | { |
| 92 | assert(fd >= 0); |
| 93 | if(fd <= PL_maxsysfd) |
| 94 | setfd_inhexec(fd); |
| 95 | } |
| 96 | void |
| 97 | Perl_setfd_cloexec_or_inhexec_by_sysfdness(pTHX_ int fd) |
| 98 | { |
| 99 | assert(fd >= 0); |
| 100 | if(fd <= PL_maxsysfd) |
| 101 | setfd_inhexec(fd); |
| 102 | else |
| 103 | setfd_cloexec(fd); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | #define DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC) \ |
| 108 | do { \ |
| 109 | int res = (GENOPEN_NORMAL); \ |
| 110 | if(LIKELY(res != -1)) GENSETFD_CLOEXEC; \ |
| 111 | return res; \ |
| 112 | } while(0) |
| 113 | #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC) && \ |
| 114 | defined(F_GETFD) |
| 115 | enum { CLOEXEC_EXPERIMENT = 0, CLOEXEC_AT_OPEN, CLOEXEC_AFTER_OPEN }; |
| 116 | # define DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, TESTFD, GENOPEN_CLOEXEC, \ |
| 117 | GENOPEN_NORMAL, GENSETFD_CLOEXEC) \ |
| 118 | do { \ |
| 119 | switch (strategy) { \ |
| 120 | case CLOEXEC_EXPERIMENT: default: { \ |
| 121 | int res = (GENOPEN_CLOEXEC), eno; \ |
| 122 | if (LIKELY(res != -1)) { \ |
| 123 | int fdflags = fcntl((TESTFD), F_GETFD); \ |
| 124 | if (LIKELY(fdflags != -1) && \ |
| 125 | LIKELY(fdflags & FD_CLOEXEC)) { \ |
| 126 | strategy = CLOEXEC_AT_OPEN; \ |
| 127 | } else { \ |
| 128 | strategy = CLOEXEC_AFTER_OPEN; \ |
| 129 | GENSETFD_CLOEXEC; \ |
| 130 | } \ |
| 131 | } else if (UNLIKELY((eno = errno) == EINVAL || \ |
| 132 | eno == ENOSYS)) { \ |
| 133 | res = (GENOPEN_NORMAL); \ |
| 134 | if (LIKELY(res != -1)) { \ |
| 135 | strategy = CLOEXEC_AFTER_OPEN; \ |
| 136 | GENSETFD_CLOEXEC; \ |
| 137 | } else if (!LIKELY((eno = errno) == EINVAL || \ |
| 138 | eno == ENOSYS)) { \ |
| 139 | strategy = CLOEXEC_AFTER_OPEN; \ |
| 140 | } \ |
| 141 | } \ |
| 142 | return res; \ |
| 143 | } \ |
| 144 | case CLOEXEC_AT_OPEN: \ |
| 145 | return (GENOPEN_CLOEXEC); \ |
| 146 | case CLOEXEC_AFTER_OPEN: \ |
| 147 | DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC); \ |
| 148 | } \ |
| 149 | } while(0) |
| 150 | #else |
| 151 | # define DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, TESTFD, GENOPEN_CLOEXEC, \ |
| 152 | GENOPEN_NORMAL, GENSETFD_CLOEXEC) \ |
| 153 | DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC) |
| 154 | #endif |
| 155 | |
| 156 | #define DO_ONEOPEN_THEN_CLOEXEC(ONEOPEN_NORMAL) \ |
| 157 | do { \ |
| 158 | int fd; \ |
| 159 | DO_GENOPEN_THEN_CLOEXEC(fd = (ONEOPEN_NORMAL), \ |
| 160 | setfd_cloexec(fd)); \ |
| 161 | } while(0) |
| 162 | #define DO_ONEOPEN_EXPERIMENTING_CLOEXEC(strategy, \ |
| 163 | ONEOPEN_CLOEXEC, ONEOPEN_NORMAL) \ |
| 164 | do { \ |
| 165 | int fd; \ |
| 166 | DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, \ |
| 167 | fd, \ |
| 168 | fd = (ONEOPEN_CLOEXEC), \ |
| 169 | fd = (ONEOPEN_NORMAL), setfd_cloexec(fd)); \ |
| 170 | } while(0) |
| 171 | |
| 172 | #define DO_PIPESETFD_CLOEXEC(PIPEFD) \ |
| 173 | do { \ |
| 174 | setfd_cloexec((PIPEFD)[0]); \ |
| 175 | setfd_cloexec((PIPEFD)[1]); \ |
| 176 | } while(0) |
| 177 | #define DO_PIPEOPEN_THEN_CLOEXEC(PIPEFD, PIPEOPEN_NORMAL) \ |
| 178 | DO_GENOPEN_THEN_CLOEXEC(PIPEOPEN_NORMAL, DO_PIPESETFD_CLOEXEC(PIPEFD)) |
| 179 | #define DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(strategy, PIPEFD, PIPEOPEN_CLOEXEC, \ |
| 180 | PIPEOPEN_NORMAL) \ |
| 181 | DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, \ |
| 182 | (PIPEFD)[0], PIPEOPEN_CLOEXEC, \ |
| 183 | PIPEOPEN_NORMAL, DO_PIPESETFD_CLOEXEC(PIPEFD)) |
| 184 | |
| 185 | int |
| 186 | Perl_PerlLIO_dup_cloexec(pTHX_ int oldfd) |
| 187 | { |
| 188 | #if !defined(PERL_IMPLICIT_SYS) && defined(F_DUPFD_CLOEXEC) |
| 189 | /* |
| 190 | * struct IPerlLIO doesn't cover fcntl(), and there's no clear way |
| 191 | * to extend it, so for the time being this just isn't available on |
| 192 | * PERL_IMPLICIT_SYS builds. |
| 193 | */ |
| 194 | dVAR; |
| 195 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 196 | PL_strategy_dup, |
| 197 | fcntl(oldfd, F_DUPFD_CLOEXEC, 0), |
| 198 | PerlLIO_dup(oldfd)); |
| 199 | #else |
| 200 | DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_dup(oldfd)); |
| 201 | #endif |
| 202 | } |
| 203 | |
| 204 | int |
| 205 | Perl_PerlLIO_dup2_cloexec(pTHX_ int oldfd, int newfd) |
| 206 | { |
| 207 | #if !defined(PERL_IMPLICIT_SYS) && defined(HAS_DUP3) && defined(O_CLOEXEC) |
| 208 | /* |
| 209 | * struct IPerlLIO doesn't cover dup3(), and there's no clear way |
| 210 | * to extend it, so for the time being this just isn't available on |
| 211 | * PERL_IMPLICIT_SYS builds. |
| 212 | */ |
| 213 | dVAR; |
| 214 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 215 | PL_strategy_dup2, |
| 216 | dup3(oldfd, newfd, O_CLOEXEC), |
| 217 | PerlLIO_dup2(oldfd, newfd)); |
| 218 | #else |
| 219 | DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_dup2(oldfd, newfd)); |
| 220 | #endif |
| 221 | } |
| 222 | |
| 223 | int |
| 224 | Perl_PerlLIO_open_cloexec(pTHX_ const char *file, int flag) |
| 225 | { |
| 226 | dVAR; |
| 227 | PERL_ARGS_ASSERT_PERLLIO_OPEN_CLOEXEC; |
| 228 | #if defined(O_CLOEXEC) |
| 229 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 230 | PL_strategy_open, |
| 231 | PerlLIO_open(file, flag | O_CLOEXEC), |
| 232 | PerlLIO_open(file, flag)); |
| 233 | #else |
| 234 | DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_open(file, flag)); |
| 235 | #endif |
| 236 | } |
| 237 | |
| 238 | int |
| 239 | Perl_PerlLIO_open3_cloexec(pTHX_ const char *file, int flag, int perm) |
| 240 | { |
| 241 | dVAR; |
| 242 | PERL_ARGS_ASSERT_PERLLIO_OPEN3_CLOEXEC; |
| 243 | #if defined(O_CLOEXEC) |
| 244 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 245 | PL_strategy_open3, |
| 246 | PerlLIO_open3(file, flag | O_CLOEXEC, perm), |
| 247 | PerlLIO_open3(file, flag, perm)); |
| 248 | #else |
| 249 | DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_open3(file, flag, perm)); |
| 250 | #endif |
| 251 | } |
| 252 | |
| 253 | int |
| 254 | Perl_my_mkstemp_cloexec(char *templte) |
| 255 | { |
| 256 | dVAR; |
| 257 | PERL_ARGS_ASSERT_MY_MKSTEMP_CLOEXEC; |
| 258 | #if defined(O_CLOEXEC) |
| 259 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 260 | PL_strategy_mkstemp, |
| 261 | Perl_my_mkostemp(templte, O_CLOEXEC), |
| 262 | Perl_my_mkstemp(templte)); |
| 263 | #else |
| 264 | DO_ONEOPEN_THEN_CLOEXEC(Perl_my_mkstemp(templte)); |
| 265 | #endif |
| 266 | } |
| 267 | |
| 268 | int |
| 269 | Perl_my_mkostemp_cloexec(char *templte, int flags) |
| 270 | { |
| 271 | dVAR; |
| 272 | PERL_ARGS_ASSERT_MY_MKOSTEMP_CLOEXEC; |
| 273 | #if defined(O_CLOEXEC) |
| 274 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 275 | PL_strategy_mkstemp, |
| 276 | Perl_my_mkostemp(templte, flags | O_CLOEXEC), |
| 277 | Perl_my_mkostemp(templte, flags)); |
| 278 | #else |
| 279 | DO_ONEOPEN_THEN_CLOEXEC(Perl_my_mkostemp(templte, flags)); |
| 280 | #endif |
| 281 | } |
| 282 | |
| 283 | #ifdef HAS_PIPE |
| 284 | int |
| 285 | Perl_PerlProc_pipe_cloexec(pTHX_ int *pipefd) |
| 286 | { |
| 287 | dVAR; |
| 288 | PERL_ARGS_ASSERT_PERLPROC_PIPE_CLOEXEC; |
| 289 | /* |
| 290 | * struct IPerlProc doesn't cover pipe2(), and there's no clear way |
| 291 | * to extend it, so for the time being this just isn't available on |
| 292 | * PERL_IMPLICIT_SYS builds. |
| 293 | */ |
| 294 | # if !defined(PERL_IMPLICIT_SYS) && defined(HAS_PIPE2) && defined(O_CLOEXEC) |
| 295 | DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(PL_strategy_pipe, pipefd, |
| 296 | pipe2(pipefd, O_CLOEXEC), |
| 297 | PerlProc_pipe(pipefd)); |
| 298 | # else |
| 299 | DO_PIPEOPEN_THEN_CLOEXEC(pipefd, PerlProc_pipe(pipefd)); |
| 300 | # endif |
| 301 | } |
| 302 | #endif |
| 303 | |
| 304 | #ifdef HAS_SOCKET |
| 305 | |
| 306 | int |
| 307 | Perl_PerlSock_socket_cloexec(pTHX_ int domain, int type, int protocol) |
| 308 | { |
| 309 | # if defined(SOCK_CLOEXEC) |
| 310 | dVAR; |
| 311 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 312 | PL_strategy_socket, |
| 313 | PerlSock_socket(domain, type | SOCK_CLOEXEC, protocol), |
| 314 | PerlSock_socket(domain, type, protocol)); |
| 315 | # else |
| 316 | DO_ONEOPEN_THEN_CLOEXEC(PerlSock_socket(domain, type, protocol)); |
| 317 | # endif |
| 318 | } |
| 319 | |
| 320 | int |
| 321 | Perl_PerlSock_accept_cloexec(pTHX_ int listenfd, struct sockaddr *addr, |
| 322 | Sock_size_t *addrlen) |
| 323 | { |
| 324 | # if !defined(PERL_IMPLICIT_SYS) && \ |
| 325 | defined(HAS_ACCEPT4) && defined(SOCK_CLOEXEC) |
| 326 | /* |
| 327 | * struct IPerlSock doesn't cover accept4(), and there's no clear |
| 328 | * way to extend it, so for the time being this just isn't available |
| 329 | * on PERL_IMPLICIT_SYS builds. |
| 330 | */ |
| 331 | dVAR; |
| 332 | DO_ONEOPEN_EXPERIMENTING_CLOEXEC( |
| 333 | PL_strategy_accept, |
| 334 | accept4(listenfd, addr, addrlen, SOCK_CLOEXEC), |
| 335 | PerlSock_accept(listenfd, addr, addrlen)); |
| 336 | # else |
| 337 | DO_ONEOPEN_THEN_CLOEXEC(PerlSock_accept(listenfd, addr, addrlen)); |
| 338 | # endif |
| 339 | } |
| 340 | |
| 341 | #endif |
| 342 | |
| 343 | #if defined (HAS_SOCKETPAIR) || \ |
| 344 | (defined (HAS_SOCKET) && defined(SOCK_DGRAM) && \ |
| 345 | defined(AF_INET) && defined(PF_INET)) |
| 346 | int |
| 347 | Perl_PerlSock_socketpair_cloexec(pTHX_ int domain, int type, int protocol, |
| 348 | int *pairfd) |
| 349 | { |
| 350 | dVAR; |
| 351 | PERL_ARGS_ASSERT_PERLSOCK_SOCKETPAIR_CLOEXEC; |
| 352 | # ifdef SOCK_CLOEXEC |
| 353 | DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(PL_strategy_socketpair, pairfd, |
| 354 | PerlSock_socketpair(domain, type | SOCK_CLOEXEC, protocol, pairfd), |
| 355 | PerlSock_socketpair(domain, type, protocol, pairfd)); |
| 356 | # else |
| 357 | DO_PIPEOPEN_THEN_CLOEXEC(pairfd, |
| 358 | PerlSock_socketpair(domain, type, protocol, pairfd)); |
| 359 | # endif |
| 360 | } |
| 361 | #endif |
| 362 | |
| 363 | static IO * |
| 364 | S_openn_setup(pTHX_ GV *gv, char *mode, PerlIO **saveifp, PerlIO **saveofp, |
| 365 | int *savefd, char *savetype) |
| 366 | { |
| 367 | IO * const io = GvIOn(gv); |
| 368 | |
| 369 | PERL_ARGS_ASSERT_OPENN_SETUP; |
| 370 | |
| 371 | *saveifp = NULL; |
| 372 | *saveofp = NULL; |
| 373 | *savefd = -1; |
| 374 | *savetype = IoTYPE_CLOSED; |
| 375 | |
| 376 | Zero(mode,sizeof(mode),char); |
| 377 | PL_forkprocess = 1; /* assume true if no fork */ |
| 378 | |
| 379 | /* If currently open - close before we re-open */ |
| 380 | if (IoIFP(io)) { |
| 381 | if (IoTYPE(io) == IoTYPE_STD) { |
| 382 | /* This is a clone of one of STD* handles */ |
| 383 | } |
| 384 | else { |
| 385 | const int old_fd = PerlIO_fileno(IoIFP(io)); |
| 386 | |
| 387 | if (old_fd >= 0 && old_fd <= PL_maxsysfd) { |
| 388 | /* This is one of the original STD* handles */ |
| 389 | *saveifp = IoIFP(io); |
| 390 | *saveofp = IoOFP(io); |
| 391 | *savetype = IoTYPE(io); |
| 392 | *savefd = old_fd; |
| 393 | } |
| 394 | else { |
| 395 | int result; |
| 396 | |
| 397 | if (IoTYPE(io) == IoTYPE_PIPE) |
| 398 | result = PerlProc_pclose(IoIFP(io)); |
| 399 | else if (IoIFP(io) != IoOFP(io)) { |
| 400 | if (IoOFP(io)) { |
| 401 | result = PerlIO_close(IoOFP(io)); |
| 402 | PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ |
| 403 | } |
| 404 | else |
| 405 | result = PerlIO_close(IoIFP(io)); |
| 406 | } |
| 407 | else |
| 408 | result = PerlIO_close(IoIFP(io)); |
| 409 | |
| 410 | if (result == EOF && old_fd > PL_maxsysfd) { |
| 411 | /* Why is this not Perl_warn*() call ? */ |
| 412 | PerlIO_printf(Perl_error_log, |
| 413 | "Warning: unable to close filehandle %" HEKf |
| 414 | " properly.\n", |
| 415 | HEKfARG(GvENAME_HEK(gv)) |
| 416 | ); |
| 417 | } |
| 418 | } |
| 419 | } |
| 420 | IoOFP(io) = IoIFP(io) = NULL; |
| 421 | } |
| 422 | return io; |
| 423 | } |
| 424 | |
| 425 | bool |
| 426 | Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw, |
| 427 | int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp, |
| 428 | I32 num_svs) |
| 429 | { |
| 430 | PERL_ARGS_ASSERT_DO_OPENN; |
| 431 | |
| 432 | if (as_raw) { |
| 433 | /* sysopen style args, i.e. integer mode and permissions */ |
| 434 | |
| 435 | if (num_svs != 0) { |
| 436 | Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld", |
| 437 | (long) num_svs); |
| 438 | } |
| 439 | return do_open_raw(gv, oname, len, rawmode, rawperm, NULL); |
| 440 | } |
| 441 | return do_open6(gv, oname, len, supplied_fp, svp, num_svs); |
| 442 | } |
| 443 | |
| 444 | bool |
| 445 | Perl_do_open_raw(pTHX_ GV *gv, const char *oname, STRLEN len, |
| 446 | int rawmode, int rawperm, Stat_t *statbufp) |
| 447 | { |
| 448 | PerlIO *saveifp; |
| 449 | PerlIO *saveofp; |
| 450 | int savefd; |
| 451 | char savetype; |
| 452 | char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */ |
| 453 | IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype); |
| 454 | int writing = 0; |
| 455 | PerlIO *fp; |
| 456 | |
| 457 | PERL_ARGS_ASSERT_DO_OPEN_RAW; |
| 458 | |
| 459 | /* For ease of blame back to 5.000, keep the existing indenting. */ |
| 460 | { |
| 461 | /* sysopen style args, i.e. integer mode and permissions */ |
| 462 | STRLEN ix = 0; |
| 463 | const int appendtrunc = |
| 464 | 0 |
| 465 | #ifdef O_APPEND /* Not fully portable. */ |
| 466 | |O_APPEND |
| 467 | #endif |
| 468 | #ifdef O_TRUNC /* Not fully portable. */ |
| 469 | |O_TRUNC |
| 470 | #endif |
| 471 | ; |
| 472 | const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc; |
| 473 | int ismodifying; |
| 474 | SV *namesv; |
| 475 | |
| 476 | /* It's not always |
| 477 | |
| 478 | O_RDONLY 0 |
| 479 | O_WRONLY 1 |
| 480 | O_RDWR 2 |
| 481 | |
| 482 | It might be (in OS/390 and Mac OS Classic it is) |
| 483 | |
| 484 | O_WRONLY 1 |
| 485 | O_RDONLY 2 |
| 486 | O_RDWR 3 |
| 487 | |
| 488 | This means that simple & with O_RDWR would look |
| 489 | like O_RDONLY is present. Therefore we have to |
| 490 | be more careful. |
| 491 | */ |
| 492 | if ((ismodifying = (rawmode & modifyingmode))) { |
| 493 | if ((ismodifying & O_WRONLY) == O_WRONLY || |
| 494 | (ismodifying & O_RDWR) == O_RDWR || |
| 495 | (ismodifying & (O_CREAT|appendtrunc))) |
| 496 | TAINT_PROPER("sysopen"); |
| 497 | } |
| 498 | mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */ |
| 499 | |
| 500 | #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE) |
| 501 | rawmode |= O_LARGEFILE; /* Transparently largefiley. */ |
| 502 | #endif |
| 503 | |
| 504 | IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing); |
| 505 | |
| 506 | namesv = newSVpvn_flags(oname, len, SVs_TEMP); |
| 507 | fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv); |
| 508 | } |
| 509 | return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd, |
| 510 | savetype, writing, 0, NULL, statbufp); |
| 511 | } |
| 512 | |
| 513 | bool |
| 514 | Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len, |
| 515 | PerlIO *supplied_fp, SV **svp, U32 num_svs) |
| 516 | { |
| 517 | PerlIO *saveifp; |
| 518 | PerlIO *saveofp; |
| 519 | int savefd; |
| 520 | char savetype; |
| 521 | char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */ |
| 522 | IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype); |
| 523 | int writing = 0; |
| 524 | PerlIO *fp; |
| 525 | bool was_fdopen = FALSE; |
| 526 | char *type = NULL; |
| 527 | |
| 528 | PERL_ARGS_ASSERT_DO_OPEN6; |
| 529 | |
| 530 | /* For ease of blame back to 5.000, keep the existing indenting. */ |
| 531 | { |
| 532 | /* Regular (non-sys) open */ |
| 533 | char *name; |
| 534 | STRLEN olen = len; |
| 535 | char *tend; |
| 536 | int dodup = 0; |
| 537 | bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0; |
| 538 | |
| 539 | /* Collect default raw/crlf info from the op */ |
| 540 | if (PL_op && PL_op->op_type == OP_OPEN) { |
| 541 | /* set up IO layers */ |
| 542 | const U8 flags = PL_op->op_private; |
| 543 | in_raw = (flags & OPpOPEN_IN_RAW); |
| 544 | in_crlf = (flags & OPpOPEN_IN_CRLF); |
| 545 | out_raw = (flags & OPpOPEN_OUT_RAW); |
| 546 | out_crlf = (flags & OPpOPEN_OUT_CRLF); |
| 547 | } |
| 548 | |
| 549 | type = savepvn(oname, len); |
| 550 | tend = type+len; |
| 551 | SAVEFREEPV(type); |
| 552 | |
| 553 | /* Lose leading and trailing white space */ |
| 554 | while (isSPACE(*type)) |
| 555 | type++; |
| 556 | while (tend > type && isSPACE(tend[-1])) |
| 557 | *--tend = '\0'; |
| 558 | |
| 559 | if (num_svs) { |
| 560 | const char *p; |
| 561 | STRLEN nlen = 0; |
| 562 | /* New style explicit name, type is just mode and layer info */ |
| 563 | #ifdef USE_STDIO |
| 564 | if (SvROK(*svp) && !memchr(oname, '&', len)) { |
| 565 | if (ckWARN(WARN_IO)) |
| 566 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 567 | "Can't open a reference"); |
| 568 | SETERRNO(EINVAL, LIB_INVARG); |
| 569 | fp = NULL; |
| 570 | goto say_false; |
| 571 | } |
| 572 | #endif /* USE_STDIO */ |
| 573 | p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL; |
| 574 | |
| 575 | if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) { |
| 576 | fp = NULL; |
| 577 | goto say_false; |
| 578 | } |
| 579 | |
| 580 | name = p ? savepvn(p, nlen) : savepvs(""); |
| 581 | |
| 582 | SAVEFREEPV(name); |
| 583 | } |
| 584 | else { |
| 585 | name = type; |
| 586 | len = tend-type; |
| 587 | } |
| 588 | IoTYPE(io) = *type; |
| 589 | if ((*type == IoTYPE_RDWR) && /* scary */ |
| 590 | (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) && |
| 591 | ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) { |
| 592 | TAINT_PROPER("open"); |
| 593 | mode[1] = *type++; |
| 594 | writing = 1; |
| 595 | } |
| 596 | |
| 597 | if (*type == IoTYPE_PIPE) { |
| 598 | if (num_svs) { |
| 599 | if (type[1] != IoTYPE_STD) { |
| 600 | unknown_open_mode: |
| 601 | Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname); |
| 602 | } |
| 603 | type++; |
| 604 | } |
| 605 | do { |
| 606 | type++; |
| 607 | } while (isSPACE(*type)); |
| 608 | if (!num_svs) { |
| 609 | name = type; |
| 610 | len = tend-type; |
| 611 | } |
| 612 | if (*name == '\0') { |
| 613 | /* command is missing 19990114 */ |
| 614 | if (ckWARN(WARN_PIPE)) |
| 615 | Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open"); |
| 616 | errno = EPIPE; |
| 617 | fp = NULL; |
| 618 | goto say_false; |
| 619 | } |
| 620 | if (!(*name == '-' && name[1] == '\0') || num_svs) |
| 621 | TAINT_ENV(); |
| 622 | TAINT_PROPER("piped open"); |
| 623 | if (!num_svs && name[len-1] == '|') { |
| 624 | name[--len] = '\0' ; |
| 625 | if (ckWARN(WARN_PIPE)) |
| 626 | Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe"); |
| 627 | } |
| 628 | mode[0] = 'w'; |
| 629 | writing = 1; |
| 630 | if (out_raw) |
| 631 | mode[1] = 'b'; |
| 632 | else if (out_crlf) |
| 633 | mode[1] = 't'; |
| 634 | if (num_svs > 1) { |
| 635 | fp = PerlProc_popen_list(mode, num_svs, svp); |
| 636 | } |
| 637 | else { |
| 638 | fp = PerlProc_popen(name,mode); |
| 639 | } |
| 640 | if (num_svs) { |
| 641 | if (*type) { |
| 642 | if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { |
| 643 | fp = NULL; |
| 644 | goto say_false; |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | } /* IoTYPE_PIPE */ |
| 649 | else if (*type == IoTYPE_WRONLY) { |
| 650 | TAINT_PROPER("open"); |
| 651 | type++; |
| 652 | if (*type == IoTYPE_WRONLY) { |
| 653 | /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */ |
| 654 | mode[0] = IoTYPE(io) = IoTYPE_APPEND; |
| 655 | type++; |
| 656 | } |
| 657 | else { |
| 658 | mode[0] = 'w'; |
| 659 | } |
| 660 | writing = 1; |
| 661 | |
| 662 | if (out_raw) |
| 663 | mode[1] = 'b'; |
| 664 | else if (out_crlf) |
| 665 | mode[1] = 't'; |
| 666 | if (*type == '&') { |
| 667 | duplicity: |
| 668 | dodup = PERLIO_DUP_FD; |
| 669 | type++; |
| 670 | if (*type == '=') { |
| 671 | dodup = 0; |
| 672 | type++; |
| 673 | } |
| 674 | if (!num_svs && !*type && supplied_fp) { |
| 675 | /* "<+&" etc. is used by typemaps */ |
| 676 | fp = supplied_fp; |
| 677 | } |
| 678 | else { |
| 679 | PerlIO *that_fp = NULL; |
| 680 | int wanted_fd; |
| 681 | UV uv; |
| 682 | if (num_svs > 1) { |
| 683 | /* diag_listed_as: More than one argument to '%s' open */ |
| 684 | Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io)); |
| 685 | } |
| 686 | while (isSPACE(*type)) |
| 687 | type++; |
| 688 | if (num_svs && ( |
| 689 | SvIOK(*svp) |
| 690 | || (SvPOKp(*svp) && looks_like_number(*svp)) |
| 691 | )) { |
| 692 | wanted_fd = SvUV(*svp); |
| 693 | num_svs = 0; |
| 694 | } |
| 695 | else if (isDIGIT(*type) |
| 696 | && grok_atoUV(type, &uv, NULL) |
| 697 | && uv <= INT_MAX |
| 698 | ) { |
| 699 | wanted_fd = (int)uv; |
| 700 | } |
| 701 | else { |
| 702 | const IO* thatio; |
| 703 | if (num_svs) { |
| 704 | thatio = sv_2io(*svp); |
| 705 | } |
| 706 | else { |
| 707 | GV * const thatgv = gv_fetchpvn_flags(type, tend - type, |
| 708 | 0, SVt_PVIO); |
| 709 | thatio = GvIO(thatgv); |
| 710 | } |
| 711 | if (!thatio) { |
| 712 | #ifdef EINVAL |
| 713 | SETERRNO(EINVAL,SS_IVCHAN); |
| 714 | #endif |
| 715 | fp = NULL; |
| 716 | goto say_false; |
| 717 | } |
| 718 | if ((that_fp = IoIFP(thatio))) { |
| 719 | /* Flush stdio buffer before dup. --mjd |
| 720 | * Unfortunately SEEK_CURing 0 seems to |
| 721 | * be optimized away on most platforms; |
| 722 | * only Solaris and Linux seem to flush |
| 723 | * on that. --jhi */ |
| 724 | /* On the other hand, do all platforms |
| 725 | * take gracefully to flushing a read-only |
| 726 | * filehandle? Perhaps we should do |
| 727 | * fsetpos(src)+fgetpos(dst)? --nik */ |
| 728 | PerlIO_flush(that_fp); |
| 729 | wanted_fd = PerlIO_fileno(that_fp); |
| 730 | /* When dup()ing STDIN, STDOUT or STDERR |
| 731 | * explicitly set appropriate access mode */ |
| 732 | if (that_fp == PerlIO_stdout() |
| 733 | || that_fp == PerlIO_stderr()) |
| 734 | IoTYPE(io) = IoTYPE_WRONLY; |
| 735 | else if (that_fp == PerlIO_stdin()) |
| 736 | IoTYPE(io) = IoTYPE_RDONLY; |
| 737 | /* When dup()ing a socket, say result is |
| 738 | * one as well */ |
| 739 | else if (IoTYPE(thatio) == IoTYPE_SOCKET) |
| 740 | IoTYPE(io) = IoTYPE_SOCKET; |
| 741 | } |
| 742 | else { |
| 743 | SETERRNO(EBADF, RMS_IFI); |
| 744 | fp = NULL; |
| 745 | goto say_false; |
| 746 | } |
| 747 | } |
| 748 | if (!num_svs) |
| 749 | type = NULL; |
| 750 | if (that_fp) { |
| 751 | fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup); |
| 752 | } |
| 753 | else { |
| 754 | if (dodup) |
| 755 | wanted_fd = PerlLIO_dup_cloexec(wanted_fd); |
| 756 | else |
| 757 | was_fdopen = TRUE; |
| 758 | if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) { |
| 759 | if (dodup && wanted_fd >= 0) |
| 760 | PerlLIO_close(wanted_fd); |
| 761 | } |
| 762 | } |
| 763 | } |
| 764 | } /* & */ |
| 765 | else { |
| 766 | while (isSPACE(*type)) |
| 767 | type++; |
| 768 | if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { |
| 769 | type++; |
| 770 | fp = PerlIO_stdout(); |
| 771 | IoTYPE(io) = IoTYPE_STD; |
| 772 | if (num_svs > 1) { |
| 773 | /* diag_listed_as: More than one argument to '%s' open */ |
| 774 | Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD); |
| 775 | } |
| 776 | } |
| 777 | else { |
| 778 | if (num_svs) { |
| 779 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); |
| 780 | } |
| 781 | else { |
| 782 | SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); |
| 783 | type = NULL; |
| 784 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv); |
| 785 | } |
| 786 | } |
| 787 | } /* !& */ |
| 788 | if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) |
| 789 | goto unknown_open_mode; |
| 790 | } /* IoTYPE_WRONLY */ |
| 791 | else if (*type == IoTYPE_RDONLY) { |
| 792 | do { |
| 793 | type++; |
| 794 | } while (isSPACE(*type)); |
| 795 | mode[0] = 'r'; |
| 796 | if (in_raw) |
| 797 | mode[1] = 'b'; |
| 798 | else if (in_crlf) |
| 799 | mode[1] = 't'; |
| 800 | if (*type == '&') { |
| 801 | goto duplicity; |
| 802 | } |
| 803 | if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { |
| 804 | type++; |
| 805 | fp = PerlIO_stdin(); |
| 806 | IoTYPE(io) = IoTYPE_STD; |
| 807 | if (num_svs > 1) { |
| 808 | /* diag_listed_as: More than one argument to '%s' open */ |
| 809 | Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD); |
| 810 | } |
| 811 | } |
| 812 | else { |
| 813 | if (num_svs) { |
| 814 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); |
| 815 | } |
| 816 | else { |
| 817 | SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); |
| 818 | type = NULL; |
| 819 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv); |
| 820 | } |
| 821 | } |
| 822 | if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) |
| 823 | goto unknown_open_mode; |
| 824 | } /* IoTYPE_RDONLY */ |
| 825 | else if ((num_svs && /* '-|...' or '...|' */ |
| 826 | type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) || |
| 827 | (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) { |
| 828 | if (num_svs) { |
| 829 | type += 2; /* skip over '-|' */ |
| 830 | } |
| 831 | else { |
| 832 | *--tend = '\0'; |
| 833 | while (tend > type && isSPACE(tend[-1])) |
| 834 | *--tend = '\0'; |
| 835 | for (; isSPACE(*type); type++) |
| 836 | ; |
| 837 | name = type; |
| 838 | len = tend-type; |
| 839 | } |
| 840 | if (*name == '\0') { |
| 841 | /* command is missing 19990114 */ |
| 842 | if (ckWARN(WARN_PIPE)) |
| 843 | Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open"); |
| 844 | errno = EPIPE; |
| 845 | fp = NULL; |
| 846 | goto say_false; |
| 847 | } |
| 848 | if (!(*name == '-' && name[1] == '\0') || num_svs) |
| 849 | TAINT_ENV(); |
| 850 | TAINT_PROPER("piped open"); |
| 851 | mode[0] = 'r'; |
| 852 | |
| 853 | if (in_raw) |
| 854 | mode[1] = 'b'; |
| 855 | else if (in_crlf) |
| 856 | mode[1] = 't'; |
| 857 | |
| 858 | if (num_svs > 1) { |
| 859 | fp = PerlProc_popen_list(mode,num_svs,svp); |
| 860 | } |
| 861 | else { |
| 862 | fp = PerlProc_popen(name,mode); |
| 863 | } |
| 864 | IoTYPE(io) = IoTYPE_PIPE; |
| 865 | if (num_svs) { |
| 866 | while (isSPACE(*type)) |
| 867 | type++; |
| 868 | if (*type) { |
| 869 | if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { |
| 870 | fp = NULL; |
| 871 | goto say_false; |
| 872 | } |
| 873 | } |
| 874 | } |
| 875 | } |
| 876 | else { /* layer(Args) */ |
| 877 | if (num_svs) |
| 878 | goto unknown_open_mode; |
| 879 | name = type; |
| 880 | IoTYPE(io) = IoTYPE_RDONLY; |
| 881 | for (; isSPACE(*name); name++) |
| 882 | ; |
| 883 | mode[0] = 'r'; |
| 884 | |
| 885 | if (in_raw) |
| 886 | mode[1] = 'b'; |
| 887 | else if (in_crlf) |
| 888 | mode[1] = 't'; |
| 889 | |
| 890 | if (*name == '-' && name[1] == '\0') { |
| 891 | fp = PerlIO_stdin(); |
| 892 | IoTYPE(io) = IoTYPE_STD; |
| 893 | } |
| 894 | else { |
| 895 | if (num_svs) { |
| 896 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); |
| 897 | } |
| 898 | else { |
| 899 | SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); |
| 900 | type = NULL; |
| 901 | fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv); |
| 902 | } |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | say_false: |
| 908 | return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd, |
| 909 | savetype, writing, was_fdopen, type, NULL); |
| 910 | } |
| 911 | |
| 912 | /* Yes, this is ugly, but it's private, and I don't see a cleaner way to |
| 913 | simplify the two-headed public interface of do_openn. */ |
| 914 | static bool |
| 915 | S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname, |
| 916 | PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype, |
| 917 | int writing, bool was_fdopen, const char *type, Stat_t *statbufp) |
| 918 | { |
| 919 | int fd; |
| 920 | Stat_t statbuf; |
| 921 | |
| 922 | PERL_ARGS_ASSERT_OPENN_CLEANUP; |
| 923 | |
| 924 | Zero(&statbuf, 1, Stat_t); |
| 925 | |
| 926 | if (!fp) { |
| 927 | if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE) |
| 928 | && should_warn_nl(oname) |
| 929 | |
| 930 | ) |
| 931 | { |
| 932 | GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */ |
| 933 | Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open"); |
| 934 | GCC_DIAG_RESTORE_STMT; |
| 935 | } |
| 936 | goto say_false; |
| 937 | } |
| 938 | |
| 939 | if (ckWARN(WARN_IO)) { |
| 940 | if ((IoTYPE(io) == IoTYPE_RDONLY) && |
| 941 | (fp == PerlIO_stdout() || fp == PerlIO_stderr())) { |
| 942 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 943 | "Filehandle STD%s reopened as %" HEKf |
| 944 | " only for input", |
| 945 | ((fp == PerlIO_stdout()) ? "OUT" : "ERR"), |
| 946 | HEKfARG(GvENAME_HEK(gv))); |
| 947 | } |
| 948 | else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) { |
| 949 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 950 | "Filehandle STDIN reopened as %" HEKf " only for output", |
| 951 | HEKfARG(GvENAME_HEK(gv)) |
| 952 | ); |
| 953 | } |
| 954 | } |
| 955 | |
| 956 | fd = PerlIO_fileno(fp); |
| 957 | /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no |
| 958 | * fd assume it isn't a socket - this covers PerlIO::scalar - |
| 959 | * otherwise unless we "know" the type probe for socket-ness. |
| 960 | */ |
| 961 | if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) { |
| 962 | if (PerlLIO_fstat(fd,&statbuf) < 0) { |
| 963 | /* If PerlIO claims to have fd we had better be able to fstat() it. */ |
| 964 | (void) PerlIO_close(fp); |
| 965 | goto say_false; |
| 966 | } |
| 967 | #ifndef PERL_MICRO |
| 968 | if (S_ISSOCK(statbuf.st_mode)) |
| 969 | IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */ |
| 970 | #ifdef HAS_SOCKET |
| 971 | else if ( |
| 972 | !(statbuf.st_mode & S_IFMT) |
| 973 | && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */ |
| 974 | && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */ |
| 975 | ) { /* on OS's that return 0 on fstat()ed pipe */ |
| 976 | char tmpbuf[256]; |
| 977 | Sock_size_t buflen = sizeof tmpbuf; |
| 978 | if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0 |
| 979 | || errno != ENOTSOCK) |
| 980 | IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */ |
| 981 | /* but some return 0 for streams too, sigh */ |
| 982 | } |
| 983 | #endif /* HAS_SOCKET */ |
| 984 | #endif /* !PERL_MICRO */ |
| 985 | } |
| 986 | |
| 987 | /* Eeek - FIXME !!! |
| 988 | * If this is a standard handle we discard all the layer stuff |
| 989 | * and just dup the fd into whatever was on the handle before ! |
| 990 | */ |
| 991 | |
| 992 | if (saveifp) { /* must use old fp? */ |
| 993 | /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR |
| 994 | then dup the new fileno down |
| 995 | */ |
| 996 | if (saveofp) { |
| 997 | PerlIO_flush(saveofp); /* emulate PerlIO_close() */ |
| 998 | if (saveofp != saveifp) { /* was a socket? */ |
| 999 | PerlIO_close(saveofp); |
| 1000 | } |
| 1001 | } |
| 1002 | if (savefd != fd) { |
| 1003 | /* Still a small can-of-worms here if (say) PerlIO::scalar |
| 1004 | is assigned to (say) STDOUT - for now let dup2() fail |
| 1005 | and provide the error |
| 1006 | */ |
| 1007 | if (fd < 0) { |
| 1008 | SETERRNO(EBADF,RMS_IFI); |
| 1009 | goto say_false; |
| 1010 | } else if (PerlLIO_dup2(fd, savefd) < 0) { |
| 1011 | (void)PerlIO_close(fp); |
| 1012 | goto say_false; |
| 1013 | } |
| 1014 | #ifdef VMS |
| 1015 | if (savefd != PerlIO_fileno(PerlIO_stdin())) { |
| 1016 | char newname[FILENAME_MAX+1]; |
| 1017 | if (PerlIO_getname(fp, newname)) { |
| 1018 | if (fd == PerlIO_fileno(PerlIO_stdout())) |
| 1019 | vmssetuserlnm("SYS$OUTPUT", newname); |
| 1020 | if (fd == PerlIO_fileno(PerlIO_stderr())) |
| 1021 | vmssetuserlnm("SYS$ERROR", newname); |
| 1022 | } |
| 1023 | } |
| 1024 | #endif |
| 1025 | |
| 1026 | #if !defined(WIN32) |
| 1027 | /* PL_fdpid isn't used on Windows, so avoid this useless work. |
| 1028 | * XXX Probably the same for a lot of other places. */ |
| 1029 | { |
| 1030 | Pid_t pid; |
| 1031 | SV *sv; |
| 1032 | |
| 1033 | sv = *av_fetch(PL_fdpid,fd,TRUE); |
| 1034 | SvUPGRADE(sv, SVt_IV); |
| 1035 | pid = SvIVX(sv); |
| 1036 | SvIV_set(sv, 0); |
| 1037 | sv = *av_fetch(PL_fdpid,savefd,TRUE); |
| 1038 | SvUPGRADE(sv, SVt_IV); |
| 1039 | SvIV_set(sv, pid); |
| 1040 | } |
| 1041 | #endif |
| 1042 | |
| 1043 | if (was_fdopen) { |
| 1044 | /* need to close fp without closing underlying fd */ |
| 1045 | int ofd = PerlIO_fileno(fp); |
| 1046 | int dupfd = ofd >= 0 ? PerlLIO_dup_cloexec(ofd) : -1; |
| 1047 | if (ofd < 0 || dupfd < 0) { |
| 1048 | if (dupfd >= 0) |
| 1049 | PerlLIO_close(dupfd); |
| 1050 | goto say_false; |
| 1051 | } |
| 1052 | PerlIO_close(fp); |
| 1053 | PerlLIO_dup2_cloexec(dupfd, ofd); |
| 1054 | setfd_inhexec_for_sysfd(ofd); |
| 1055 | PerlLIO_close(dupfd); |
| 1056 | } |
| 1057 | else |
| 1058 | PerlIO_close(fp); |
| 1059 | } |
| 1060 | fp = saveifp; |
| 1061 | PerlIO_clearerr(fp); |
| 1062 | fd = PerlIO_fileno(fp); |
| 1063 | } |
| 1064 | IoIFP(io) = fp; |
| 1065 | |
| 1066 | IoFLAGS(io) &= ~IOf_NOLINE; |
| 1067 | if (writing) { |
| 1068 | if (IoTYPE(io) == IoTYPE_SOCKET |
| 1069 | || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(statbuf.st_mode)) ) { |
| 1070 | char *s = mode; |
| 1071 | if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC) |
| 1072 | s++; |
| 1073 | *s = 'w'; |
| 1074 | if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) { |
| 1075 | PerlIO_close(fp); |
| 1076 | goto say_false; |
| 1077 | } |
| 1078 | } |
| 1079 | else |
| 1080 | IoOFP(io) = fp; |
| 1081 | } |
| 1082 | if (statbufp) |
| 1083 | *statbufp = statbuf; |
| 1084 | |
| 1085 | return TRUE; |
| 1086 | |
| 1087 | say_false: |
| 1088 | IoIFP(io) = saveifp; |
| 1089 | IoOFP(io) = saveofp; |
| 1090 | IoTYPE(io) = savetype; |
| 1091 | return FALSE; |
| 1092 | } |
| 1093 | |
| 1094 | /* Open a temp file in the same directory as an original name. |
| 1095 | */ |
| 1096 | |
| 1097 | static bool |
| 1098 | S_openindirtemp(pTHX_ GV *gv, SV *orig_name, SV *temp_out_name) { |
| 1099 | int fd; |
| 1100 | PerlIO *fp; |
| 1101 | const char *p = SvPV_nolen(orig_name); |
| 1102 | const char *sep; |
| 1103 | |
| 1104 | /* look for the last directory separator */ |
| 1105 | sep = strrchr(p, '/'); |
| 1106 | |
| 1107 | #ifdef DOSISH |
| 1108 | { |
| 1109 | const char *sep2; |
| 1110 | if ((sep2 = strrchr(sep ? sep : p, '\\'))) |
| 1111 | sep = sep2; |
| 1112 | } |
| 1113 | #endif |
| 1114 | #ifdef VMS |
| 1115 | if (!sep) { |
| 1116 | const char *openp = strchr(p, '['); |
| 1117 | if (openp) |
| 1118 | sep = strchr(openp, ']'); |
| 1119 | else { |
| 1120 | sep = strchr(p, ':'); |
| 1121 | } |
| 1122 | } |
| 1123 | #endif |
| 1124 | if (sep) { |
| 1125 | sv_setpvn(temp_out_name, p, sep - p + 1); |
| 1126 | sv_catpvs(temp_out_name, "XXXXXXXX"); |
| 1127 | } |
| 1128 | else |
| 1129 | sv_setpvs(temp_out_name, "XXXXXXXX"); |
| 1130 | |
| 1131 | { |
| 1132 | int old_umask = umask(0177); |
| 1133 | fd = Perl_my_mkstemp_cloexec(SvPVX(temp_out_name)); |
| 1134 | umask(old_umask); |
| 1135 | } |
| 1136 | |
| 1137 | if (fd < 0) |
| 1138 | return FALSE; |
| 1139 | |
| 1140 | fp = PerlIO_fdopen(fd, "w+"); |
| 1141 | if (!fp) |
| 1142 | return FALSE; |
| 1143 | |
| 1144 | return do_openn(gv, "+>&", 3, 0, 0, 0, fp, NULL, 0); |
| 1145 | } |
| 1146 | |
| 1147 | #if defined(HAS_UNLINKAT) && defined(HAS_RENAMEAT) && defined(HAS_FCHMODAT) && \ |
| 1148 | (defined(HAS_DIRFD) || defined(HAS_DIR_DD_FD)) && !defined(NO_USE_ATFUNCTIONS) && \ |
| 1149 | defined(HAS_LINKAT) |
| 1150 | # define ARGV_USE_ATFUNCTIONS |
| 1151 | #endif |
| 1152 | |
| 1153 | /* Win32 doesn't necessarily return useful information |
| 1154 | * in st_dev, st_ino. |
| 1155 | */ |
| 1156 | #ifndef DOSISH |
| 1157 | # define ARGV_USE_STAT_INO |
| 1158 | #endif |
| 1159 | |
| 1160 | #define ARGVMG_BACKUP_NAME 0 |
| 1161 | #define ARGVMG_TEMP_NAME 1 |
| 1162 | #define ARGVMG_ORIG_NAME 2 |
| 1163 | #define ARGVMG_ORIG_MODE 3 |
| 1164 | #define ARGVMG_ORIG_PID 4 |
| 1165 | |
| 1166 | /* we store the entire stat_t since the ino_t and dev_t values might |
| 1167 | not fit in an IV. I could have created a new structure and |
| 1168 | transferred them across, but this seemed too much effort for very |
| 1169 | little win. |
| 1170 | |
| 1171 | We store it even when the *at() functions are available, since |
| 1172 | while the C runtime might have definitions for these functions, the |
| 1173 | operating system or a specific filesystem might not implement them. |
| 1174 | eg. NetBSD 6 implements linkat() but only where the fds are AT_FDCWD. |
| 1175 | */ |
| 1176 | #ifdef ARGV_USE_STAT_INO |
| 1177 | # define ARGVMG_ORIG_CWD_STAT 5 |
| 1178 | #endif |
| 1179 | |
| 1180 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1181 | # define ARGVMG_ORIG_DIRP 6 |
| 1182 | #endif |
| 1183 | |
| 1184 | #ifdef ENOTSUP |
| 1185 | #define NotSupported(e) ((e) == ENOSYS || (e) == ENOTSUP) |
| 1186 | #else |
| 1187 | #define NotSupported(e) ((e) == ENOSYS) |
| 1188 | #endif |
| 1189 | |
| 1190 | static int |
| 1191 | S_argvout_free(pTHX_ SV *io, MAGIC *mg) { |
| 1192 | PERL_UNUSED_ARG(io); |
| 1193 | |
| 1194 | /* note this can be entered once the file has been |
| 1195 | successfully deleted too */ |
| 1196 | assert(IoTYPE(io) != IoTYPE_PIPE); |
| 1197 | |
| 1198 | /* mg_obj can be NULL if a thread is created with the handle open, in which |
| 1199 | case we leave any clean up to the parent thread */ |
| 1200 | if (mg->mg_obj) { |
| 1201 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1202 | SV **dir_psv; |
| 1203 | DIR *dir; |
| 1204 | |
| 1205 | dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE); |
| 1206 | assert(dir_psv && *dir_psv && SvIOK(*dir_psv)); |
| 1207 | dir = INT2PTR(DIR *, SvIV(*dir_psv)); |
| 1208 | #endif |
| 1209 | if (IoIFP(io)) { |
| 1210 | if (PL_phase == PERL_PHASE_DESTRUCT && PL_statusvalue == 0) { |
| 1211 | (void)argvout_final(mg, (IO*)io, FALSE); |
| 1212 | } |
| 1213 | else { |
| 1214 | SV **pid_psv; |
| 1215 | PerlIO *iop = IoIFP(io); |
| 1216 | |
| 1217 | assert(SvTYPE(mg->mg_obj) == SVt_PVAV); |
| 1218 | |
| 1219 | pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE); |
| 1220 | |
| 1221 | assert(pid_psv && *pid_psv); |
| 1222 | |
| 1223 | if (SvIV(*pid_psv) == (IV)PerlProc_getpid()) { |
| 1224 | /* if we get here the file hasn't been closed explicitly by the |
| 1225 | user and hadn't been closed implicitly by nextargv(), so |
| 1226 | abandon the edit */ |
| 1227 | SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE); |
| 1228 | const char *temp_pv = SvPVX(*temp_psv); |
| 1229 | |
| 1230 | assert(temp_psv && *temp_psv && SvPOK(*temp_psv)); |
| 1231 | (void)PerlIO_close(iop); |
| 1232 | IoIFP(io) = IoOFP(io) = NULL; |
| 1233 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1234 | if (dir) { |
| 1235 | if (unlinkat(my_dirfd(dir), temp_pv, 0) < 0 && |
| 1236 | NotSupported(errno)) |
| 1237 | (void)UNLINK(temp_pv); |
| 1238 | } |
| 1239 | #else |
| 1240 | (void)UNLINK(temp_pv); |
| 1241 | #endif |
| 1242 | } |
| 1243 | } |
| 1244 | } |
| 1245 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1246 | if (dir) |
| 1247 | closedir(dir); |
| 1248 | #endif |
| 1249 | } |
| 1250 | |
| 1251 | return 0; |
| 1252 | } |
| 1253 | |
| 1254 | static int |
| 1255 | S_argvout_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) { |
| 1256 | PERL_UNUSED_ARG(param); |
| 1257 | |
| 1258 | /* ideally we could just remove the magic from the SV but we don't get the SV here */ |
| 1259 | SvREFCNT_dec(mg->mg_obj); |
| 1260 | mg->mg_obj = NULL; |
| 1261 | |
| 1262 | return 0; |
| 1263 | } |
| 1264 | |
| 1265 | /* Magic of this type has an AV containing the following: |
| 1266 | 0: name of the backup file (if any) |
| 1267 | 1: name of the temp output file |
| 1268 | 2: name of the original file |
| 1269 | 3: file mode of the original file |
| 1270 | 4: pid of the process we opened at, to prevent doing the renaming |
| 1271 | etc in both the child and the parent after a fork |
| 1272 | |
| 1273 | If we have useful inode/device ids in stat_t we also keep: |
| 1274 | 5: a stat of the original current working directory |
| 1275 | |
| 1276 | If we have unlinkat(), renameat(), fchmodat(), dirfd() we also keep: |
| 1277 | 6: the DIR * for the current directory when we open the file, stored as an IV |
| 1278 | */ |
| 1279 | |
| 1280 | static const MGVTBL argvout_vtbl = |
| 1281 | { |
| 1282 | NULL, /* svt_get */ |
| 1283 | NULL, /* svt_set */ |
| 1284 | NULL, /* svt_len */ |
| 1285 | NULL, /* svt_clear */ |
| 1286 | S_argvout_free, /* svt_free */ |
| 1287 | NULL, /* svt_copy */ |
| 1288 | S_argvout_dup, /* svt_dup */ |
| 1289 | NULL /* svt_local */ |
| 1290 | }; |
| 1291 | |
| 1292 | PerlIO * |
| 1293 | Perl_nextargv(pTHX_ GV *gv, bool nomagicopen) |
| 1294 | { |
| 1295 | IO * const io = GvIOp(gv); |
| 1296 | SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL; |
| 1297 | |
| 1298 | PERL_ARGS_ASSERT_NEXTARGV; |
| 1299 | |
| 1300 | if (old_out_name) |
| 1301 | SAVEFREESV(old_out_name); |
| 1302 | |
| 1303 | if (!PL_argvoutgv) |
| 1304 | PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); |
| 1305 | if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) { |
| 1306 | IoFLAGS(io) &= ~IOf_START; |
| 1307 | if (PL_inplace) { |
| 1308 | assert(PL_defoutgv); |
| 1309 | Perl_av_create_and_push(aTHX_ &PL_argvout_stack, |
| 1310 | SvREFCNT_inc_simple_NN(PL_defoutgv)); |
| 1311 | } |
| 1312 | } |
| 1313 | |
| 1314 | { |
| 1315 | IO * const io = GvIOp(PL_argvoutgv); |
| 1316 | if (io && IoIFP(io) && old_out_name) { |
| 1317 | do_close(PL_argvoutgv, FALSE); |
| 1318 | } |
| 1319 | } |
| 1320 | |
| 1321 | PL_lastfd = -1; |
| 1322 | PL_filemode = 0; |
| 1323 | if (!GvAV(gv)) |
| 1324 | return NULL; |
| 1325 | while (av_tindex(GvAV(gv)) >= 0) { |
| 1326 | STRLEN oldlen; |
| 1327 | SV *const sv = av_shift(GvAV(gv)); |
| 1328 | SAVEFREESV(sv); |
| 1329 | SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */ |
| 1330 | sv_setsv(GvSVn(gv),sv); |
| 1331 | SvSETMAGIC(GvSV(gv)); |
| 1332 | PL_oldname = SvPVx(GvSV(gv), oldlen); |
| 1333 | if (LIKELY(!PL_inplace)) { |
| 1334 | if (nomagicopen |
| 1335 | ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1) |
| 1336 | : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0) |
| 1337 | ) { |
| 1338 | return IoIFP(GvIOp(gv)); |
| 1339 | } |
| 1340 | } |
| 1341 | else { |
| 1342 | Stat_t statbuf; |
| 1343 | /* This very long block ends with return IoIFP(GvIOp(gv)); |
| 1344 | Both this block and the block above fall through on open |
| 1345 | failure to the warning code, and then the while loop above tries |
| 1346 | the next entry. */ |
| 1347 | if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0, &statbuf)) { |
| 1348 | #ifndef FLEXFILENAMES |
| 1349 | int filedev; |
| 1350 | int fileino; |
| 1351 | #endif |
| 1352 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1353 | DIR *curdir; |
| 1354 | #endif |
| 1355 | Uid_t fileuid; |
| 1356 | Gid_t filegid; |
| 1357 | AV *magic_av = NULL; |
| 1358 | SV *temp_name_sv = NULL; |
| 1359 | MAGIC *mg; |
| 1360 | |
| 1361 | TAINT_PROPER("inplace open"); |
| 1362 | if (oldlen == 1 && *PL_oldname == '-') { |
| 1363 | setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, |
| 1364 | SVt_PVIO)); |
| 1365 | return IoIFP(GvIOp(gv)); |
| 1366 | } |
| 1367 | #ifndef FLEXFILENAMES |
| 1368 | filedev = statbuf.st_dev; |
| 1369 | fileino = statbuf.st_ino; |
| 1370 | #endif |
| 1371 | PL_filemode = statbuf.st_mode; |
| 1372 | fileuid = statbuf.st_uid; |
| 1373 | filegid = statbuf.st_gid; |
| 1374 | if (!S_ISREG(PL_filemode)) { |
| 1375 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 1376 | "Can't do inplace edit: %s is not a regular file", |
| 1377 | PL_oldname ); |
| 1378 | do_close(gv,FALSE); |
| 1379 | continue; |
| 1380 | } |
| 1381 | magic_av = newAV(); |
| 1382 | if (*PL_inplace && strNE(PL_inplace, "*")) { |
| 1383 | const char *star = strchr(PL_inplace, '*'); |
| 1384 | if (star) { |
| 1385 | const char *begin = PL_inplace; |
| 1386 | SvPVCLEAR(sv); |
| 1387 | do { |
| 1388 | sv_catpvn(sv, begin, star - begin); |
| 1389 | sv_catpvn(sv, PL_oldname, oldlen); |
| 1390 | begin = ++star; |
| 1391 | } while ((star = strchr(begin, '*'))); |
| 1392 | if (*begin) |
| 1393 | sv_catpv(sv,begin); |
| 1394 | } |
| 1395 | else { |
| 1396 | sv_catpv(sv,PL_inplace); |
| 1397 | } |
| 1398 | #ifndef FLEXFILENAMES |
| 1399 | if ((PerlLIO_stat(SvPVX_const(sv),&statbuf) >= 0 |
| 1400 | && statbuf.st_dev == filedev |
| 1401 | && statbuf.st_ino == fileino) |
| 1402 | #ifdef DJGPP |
| 1403 | || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0) |
| 1404 | #endif |
| 1405 | ) |
| 1406 | { |
| 1407 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), |
| 1408 | "Can't do inplace edit: %" |
| 1409 | SVf " would not be unique", |
| 1410 | SVfARG(sv)); |
| 1411 | goto cleanup_argv; |
| 1412 | } |
| 1413 | #endif |
| 1414 | av_store(magic_av, ARGVMG_BACKUP_NAME, newSVsv(sv)); |
| 1415 | } |
| 1416 | |
| 1417 | sv_setpvn(sv,PL_oldname,oldlen); |
| 1418 | SETERRNO(0,0); /* in case sprintf set errno */ |
| 1419 | temp_name_sv = newSV(0); |
| 1420 | if (!S_openindirtemp(aTHX_ PL_argvoutgv, GvSV(gv), temp_name_sv)) { |
| 1421 | SvREFCNT_dec(temp_name_sv); |
| 1422 | /* diag_listed_as: Can't do inplace edit on %s: %s */ |
| 1423 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: Cannot make temp name: %s", |
| 1424 | PL_oldname, Strerror(errno) ); |
| 1425 | #ifndef FLEXFILENAMES |
| 1426 | cleanup_argv: |
| 1427 | #endif |
| 1428 | do_close(gv,FALSE); |
| 1429 | SvREFCNT_dec(magic_av); |
| 1430 | continue; |
| 1431 | } |
| 1432 | av_store(magic_av, ARGVMG_TEMP_NAME, temp_name_sv); |
| 1433 | av_store(magic_av, ARGVMG_ORIG_NAME, newSVsv(sv)); |
| 1434 | av_store(magic_av, ARGVMG_ORIG_MODE, newSVuv(PL_filemode)); |
| 1435 | av_store(magic_av, ARGVMG_ORIG_PID, newSViv((IV)PerlProc_getpid())); |
| 1436 | #if defined(ARGV_USE_ATFUNCTIONS) |
| 1437 | curdir = opendir("."); |
| 1438 | av_store(magic_av, ARGVMG_ORIG_DIRP, newSViv(PTR2IV(curdir))); |
| 1439 | #elif defined(ARGV_USE_STAT_INO) |
| 1440 | if (PerlLIO_stat(".", &statbuf) >= 0) { |
| 1441 | av_store(magic_av, ARGVMG_ORIG_CWD_STAT, |
| 1442 | newSVpvn((char *)&statbuf, sizeof(statbuf))); |
| 1443 | } |
| 1444 | #endif |
| 1445 | setdefout(PL_argvoutgv); |
| 1446 | sv_setsv(GvSVn(PL_argvoutgv), temp_name_sv); |
| 1447 | mg = sv_magicext((SV*)GvIOp(PL_argvoutgv), (SV*)magic_av, PERL_MAGIC_uvar, &argvout_vtbl, NULL, 0); |
| 1448 | mg->mg_flags |= MGf_DUP; |
| 1449 | SvREFCNT_dec(magic_av); |
| 1450 | PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv))); |
| 1451 | if (PL_lastfd >= 0) { |
| 1452 | (void)PerlLIO_fstat(PL_lastfd,&statbuf); |
| 1453 | #ifdef HAS_FCHMOD |
| 1454 | (void)fchmod(PL_lastfd,PL_filemode); |
| 1455 | #else |
| 1456 | (void)PerlLIO_chmod(PL_oldname,PL_filemode); |
| 1457 | #endif |
| 1458 | if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) { |
| 1459 | /* XXX silently ignore failures */ |
| 1460 | #ifdef HAS_FCHOWN |
| 1461 | PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid)); |
| 1462 | #elif defined(HAS_CHOWN) |
| 1463 | PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid)); |
| 1464 | #endif |
| 1465 | } |
| 1466 | } |
| 1467 | return IoIFP(GvIOp(gv)); |
| 1468 | } |
| 1469 | } /* successful do_open_raw(), PL_inplace non-NULL */ |
| 1470 | |
| 1471 | if (ckWARN_d(WARN_INPLACE)) { |
| 1472 | const int eno = errno; |
| 1473 | Stat_t statbuf; |
| 1474 | if (PerlLIO_stat(PL_oldname, &statbuf) >= 0 |
| 1475 | && !S_ISREG(statbuf.st_mode)) { |
| 1476 | Perl_warner(aTHX_ packWARN(WARN_INPLACE), |
| 1477 | "Can't do inplace edit: %s is not a regular file", |
| 1478 | PL_oldname); |
| 1479 | } |
| 1480 | else { |
| 1481 | Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s", |
| 1482 | PL_oldname, Strerror(eno)); |
| 1483 | } |
| 1484 | } |
| 1485 | } |
| 1486 | if (io && (IoFLAGS(io) & IOf_ARGV)) |
| 1487 | IoFLAGS(io) |= IOf_START; |
| 1488 | if (PL_inplace) { |
| 1489 | if (io && (IoFLAGS(io) & IOf_ARGV) |
| 1490 | && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0) |
| 1491 | { |
| 1492 | GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack)); |
| 1493 | setdefout(oldout); |
| 1494 | SvREFCNT_dec_NN(oldout); |
| 1495 | return NULL; |
| 1496 | } |
| 1497 | setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO)); |
| 1498 | } |
| 1499 | return NULL; |
| 1500 | } |
| 1501 | |
| 1502 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1503 | # if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 1504 | |
| 1505 | /* FreeBSD 11 renameat() mis-behaves strangely with absolute paths in cases where the |
| 1506 | * equivalent rename() succeeds |
| 1507 | */ |
| 1508 | static int |
| 1509 | S_my_renameat(int olddfd, const char *oldpath, int newdfd, const char *newpath) { |
| 1510 | /* this is intended only for use in Perl_do_close() */ |
| 1511 | assert(olddfd == newdfd); |
| 1512 | assert(PERL_FILE_IS_ABSOLUTE(oldpath) == PERL_FILE_IS_ABSOLUTE(newpath)); |
| 1513 | if (PERL_FILE_IS_ABSOLUTE(oldpath)) { |
| 1514 | return PerlLIO_rename(oldpath, newpath); |
| 1515 | } |
| 1516 | else { |
| 1517 | return renameat(olddfd, oldpath, newdfd, newpath); |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | # else |
| 1522 | # define S_my_renameat(dh1, pv1, dh2, pv2) renameat((dh1), (pv1), (dh2), (pv2)) |
| 1523 | # endif /* if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */ |
| 1524 | #endif |
| 1525 | |
| 1526 | static bool |
| 1527 | S_dir_unchanged(pTHX_ const char *orig_pv, MAGIC *mg) { |
| 1528 | Stat_t statbuf; |
| 1529 | |
| 1530 | #ifdef ARGV_USE_STAT_INO |
| 1531 | SV **stat_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_CWD_STAT, FALSE); |
| 1532 | Stat_t *orig_cwd_stat = stat_psv && *stat_psv ? (Stat_t *)SvPVX(*stat_psv) : NULL; |
| 1533 | |
| 1534 | /* if the path is absolute the possible moving of cwd (which the file |
| 1535 | might be in) isn't our problem. |
| 1536 | This code tries to be reasonably balanced about detecting a changed |
| 1537 | CWD, if we have the information needed to check that curdir has changed, we |
| 1538 | check it |
| 1539 | */ |
| 1540 | if (!PERL_FILE_IS_ABSOLUTE(orig_pv) |
| 1541 | && orig_cwd_stat |
| 1542 | && PerlLIO_stat(".", &statbuf) >= 0 |
| 1543 | && ( statbuf.st_dev != orig_cwd_stat->st_dev |
| 1544 | || statbuf.st_ino != orig_cwd_stat->st_ino)) { |
| 1545 | Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s", |
| 1546 | orig_pv, "Current directory has changed"); |
| 1547 | } |
| 1548 | #else |
| 1549 | SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE); |
| 1550 | |
| 1551 | /* Some platforms don't have useful st_ino etc, so just |
| 1552 | check we can see the work file. |
| 1553 | */ |
| 1554 | if (!PERL_FILE_IS_ABSOLUTE(orig_pv) |
| 1555 | && PerlLIO_stat(SvPVX(*temp_psv), &statbuf) < 0) { |
| 1556 | Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s", |
| 1557 | orig_pv, |
| 1558 | "Work file is missing - did you change directory?"); |
| 1559 | } |
| 1560 | #endif |
| 1561 | |
| 1562 | return TRUE; |
| 1563 | } |
| 1564 | |
| 1565 | #define dir_unchanged(orig_psv, mg) \ |
| 1566 | S_dir_unchanged(aTHX_ (orig_psv), (mg)) |
| 1567 | |
| 1568 | STATIC bool |
| 1569 | S_argvout_final(pTHX_ MAGIC *mg, IO *io, bool not_implicit) { |
| 1570 | bool retval; |
| 1571 | |
| 1572 | /* ensure args are checked before we start using them */ |
| 1573 | PERL_ARGS_ASSERT_ARGVOUT_FINAL; |
| 1574 | |
| 1575 | { |
| 1576 | /* handle to an in-place edit work file */ |
| 1577 | SV **back_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_BACKUP_NAME, FALSE); |
| 1578 | SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE); |
| 1579 | /* PL_oldname may have been modified by a nested ARGV use at this point */ |
| 1580 | SV **orig_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_NAME, FALSE); |
| 1581 | SV **mode_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_MODE, FALSE); |
| 1582 | SV **pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE); |
| 1583 | #if defined(ARGV_USE_ATFUNCTIONS) |
| 1584 | SV **dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE); |
| 1585 | DIR *dir; |
| 1586 | int dfd; |
| 1587 | #endif |
| 1588 | UV mode; |
| 1589 | int fd; |
| 1590 | |
| 1591 | const char *orig_pv; |
| 1592 | |
| 1593 | assert(temp_psv && *temp_psv); |
| 1594 | assert(orig_psv && *orig_psv); |
| 1595 | assert(mode_psv && *mode_psv); |
| 1596 | assert(pid_psv && *pid_psv); |
| 1597 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1598 | assert(dir_psv && *dir_psv); |
| 1599 | dir = INT2PTR(DIR *, SvIVX(*dir_psv)); |
| 1600 | dfd = my_dirfd(dir); |
| 1601 | #endif |
| 1602 | |
| 1603 | orig_pv = SvPVX(*orig_psv); |
| 1604 | mode = SvUV(*mode_psv); |
| 1605 | |
| 1606 | if ((mode & (S_ISUID|S_ISGID)) != 0 |
| 1607 | && (fd = PerlIO_fileno(IoIFP(io))) >= 0) { |
| 1608 | (void)PerlIO_flush(IoIFP(io)); |
| 1609 | #ifdef HAS_FCHMOD |
| 1610 | (void)fchmod(fd, mode); |
| 1611 | #else |
| 1612 | (void)PerlLIO_chmod(orig_pv, mode); |
| 1613 | #endif |
| 1614 | } |
| 1615 | |
| 1616 | retval = io_close(io, NULL, not_implicit, FALSE); |
| 1617 | |
| 1618 | if (SvIV(*pid_psv) != (IV)PerlProc_getpid()) { |
| 1619 | /* this is a child process, don't duplicate our rename() etc |
| 1620 | processing below */ |
| 1621 | goto freext; |
| 1622 | } |
| 1623 | |
| 1624 | if (retval) { |
| 1625 | #if defined(DOSISH) || defined(__CYGWIN__) |
| 1626 | if (PL_argvgv && GvIOp(PL_argvgv) |
| 1627 | && IoIFP(GvIOp(PL_argvgv)) |
| 1628 | && (IoFLAGS(GvIOp(PL_argvgv)) & (IOf_ARGV|IOf_START)) == IOf_ARGV) { |
| 1629 | do_close(PL_argvgv, FALSE); |
| 1630 | } |
| 1631 | #endif |
| 1632 | #ifndef ARGV_USE_ATFUNCTIONS |
| 1633 | if (!dir_unchanged(orig_pv, mg)) |
| 1634 | goto abort_inplace; |
| 1635 | #endif |
| 1636 | if (back_psv && *back_psv) { |
| 1637 | #if defined(HAS_LINK) && !defined(DOSISH) && !defined(__CYGWIN__) && defined(HAS_RENAME) |
| 1638 | if ( |
| 1639 | # ifdef ARGV_USE_ATFUNCTIONS |
| 1640 | linkat(dfd, orig_pv, dfd, SvPVX(*back_psv), 0) < 0 && |
| 1641 | !(UNLIKELY(NotSupported(errno)) && |
| 1642 | dir_unchanged(orig_pv, mg) && |
| 1643 | link(orig_pv, SvPVX(*back_psv)) == 0) |
| 1644 | # else |
| 1645 | link(orig_pv, SvPVX(*back_psv)) < 0 |
| 1646 | # endif |
| 1647 | ) |
| 1648 | #endif |
| 1649 | { |
| 1650 | #ifdef HAS_RENAME |
| 1651 | if ( |
| 1652 | # ifdef ARGV_USE_ATFUNCTIONS |
| 1653 | S_my_renameat(dfd, orig_pv, dfd, SvPVX(*back_psv)) < 0 && |
| 1654 | !(UNLIKELY(NotSupported(errno)) && |
| 1655 | dir_unchanged(orig_pv, mg) && |
| 1656 | PerlLIO_rename(orig_pv, SvPVX(*back_psv)) == 0) |
| 1657 | # else |
| 1658 | PerlLIO_rename(orig_pv, SvPVX(*back_psv)) < 0 |
| 1659 | # endif |
| 1660 | ) { |
| 1661 | if (!not_implicit) { |
| 1662 | # ifdef ARGV_USE_ATFUNCTIONS |
| 1663 | if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 && |
| 1664 | UNLIKELY(NotSupported(errno)) && |
| 1665 | dir_unchanged(orig_pv, mg)) |
| 1666 | (void)UNLINK(SvPVX_const(*temp_psv)); |
| 1667 | # else |
| 1668 | UNLINK(SvPVX(*temp_psv)); |
| 1669 | # endif |
| 1670 | Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file", |
| 1671 | SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno)); |
| 1672 | } |
| 1673 | /* should we warn here? */ |
| 1674 | goto abort_inplace; |
| 1675 | } |
| 1676 | #else |
| 1677 | (void)UNLINK(SvPVX(*back_psv)); |
| 1678 | if (link(orig_pv, SvPVX(*back_psv))) { |
| 1679 | if (!not_implicit) { |
| 1680 | Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file", |
| 1681 | SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno)); |
| 1682 | } |
| 1683 | goto abort_inplace; |
| 1684 | } |
| 1685 | /* we need to use link() to get the temp into place too, and linK() |
| 1686 | fails if the new link name exists */ |
| 1687 | (void)UNLINK(orig_pv); |
| 1688 | #endif |
| 1689 | } |
| 1690 | } |
| 1691 | #if defined(DOSISH) || defined(__CYGWIN__) || !defined(HAS_RENAME) |
| 1692 | else { |
| 1693 | UNLINK(orig_pv); |
| 1694 | } |
| 1695 | #endif |
| 1696 | if ( |
| 1697 | #if !defined(HAS_RENAME) |
| 1698 | link(SvPVX(*temp_psv), orig_pv) < 0 |
| 1699 | #elif defined(ARGV_USE_ATFUNCTIONS) |
| 1700 | S_my_renameat(dfd, SvPVX(*temp_psv), dfd, orig_pv) < 0 && |
| 1701 | !(UNLIKELY(NotSupported(errno)) && |
| 1702 | dir_unchanged(orig_pv, mg) && |
| 1703 | PerlLIO_rename(SvPVX(*temp_psv), orig_pv) == 0) |
| 1704 | #else |
| 1705 | PerlLIO_rename(SvPVX(*temp_psv), orig_pv) < 0 |
| 1706 | #endif |
| 1707 | ) { |
| 1708 | if (!not_implicit) { |
| 1709 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1710 | if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 && |
| 1711 | NotSupported(errno)) |
| 1712 | UNLINK(SvPVX(*temp_psv)); |
| 1713 | #else |
| 1714 | UNLINK(SvPVX(*temp_psv)); |
| 1715 | #endif |
| 1716 | /* diag_listed_as: Cannot complete in-place edit of %s: %s */ |
| 1717 | Perl_croak(aTHX_ "Cannot complete in-place edit of %s: failed to rename work file '%s' to '%s': %s", |
| 1718 | orig_pv, SvPVX(*temp_psv), orig_pv, Strerror(errno)); |
| 1719 | } |
| 1720 | abort_inplace: |
| 1721 | UNLINK(SvPVX_const(*temp_psv)); |
| 1722 | retval = FALSE; |
| 1723 | } |
| 1724 | #ifndef HAS_RENAME |
| 1725 | UNLINK(SvPVX(*temp_psv)); |
| 1726 | #endif |
| 1727 | } |
| 1728 | else { |
| 1729 | #ifdef ARGV_USE_ATFUNCTIONS |
| 1730 | if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) && |
| 1731 | NotSupported(errno)) |
| 1732 | UNLINK(SvPVX_const(*temp_psv)); |
| 1733 | |
| 1734 | #else |
| 1735 | UNLINK(SvPVX_const(*temp_psv)); |
| 1736 | #endif |
| 1737 | if (!not_implicit) { |
| 1738 | Perl_croak(aTHX_ "Failed to close in-place work file %s: %s", |
| 1739 | SvPVX(*temp_psv), Strerror(errno)); |
| 1740 | } |
| 1741 | } |
| 1742 | freext: |
| 1743 | ; |
| 1744 | } |
| 1745 | return retval; |
| 1746 | } |
| 1747 | |
| 1748 | /* explicit renamed to avoid C++ conflict -- kja */ |
| 1749 | bool |
| 1750 | Perl_do_close(pTHX_ GV *gv, bool not_implicit) |
| 1751 | { |
| 1752 | bool retval; |
| 1753 | IO *io; |
| 1754 | MAGIC *mg; |
| 1755 | |
| 1756 | if (!gv) |
| 1757 | gv = PL_argvgv; |
| 1758 | if (!gv || !isGV_with_GP(gv)) { |
| 1759 | if (not_implicit) |
| 1760 | SETERRNO(EBADF,SS_IVCHAN); |
| 1761 | return FALSE; |
| 1762 | } |
| 1763 | io = GvIO(gv); |
| 1764 | if (!io) { /* never opened */ |
| 1765 | if (not_implicit) { |
| 1766 | report_evil_fh(gv); |
| 1767 | SETERRNO(EBADF,SS_IVCHAN); |
| 1768 | } |
| 1769 | return FALSE; |
| 1770 | } |
| 1771 | if ((mg = mg_findext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl)) |
| 1772 | && mg->mg_obj) { |
| 1773 | retval = argvout_final(mg, io, not_implicit); |
| 1774 | mg_freeext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl); |
| 1775 | } |
| 1776 | else { |
| 1777 | retval = io_close(io, NULL, not_implicit, FALSE); |
| 1778 | } |
| 1779 | if (not_implicit) { |
| 1780 | IoLINES(io) = 0; |
| 1781 | IoPAGE(io) = 0; |
| 1782 | IoLINES_LEFT(io) = IoPAGE_LEN(io); |
| 1783 | } |
| 1784 | IoTYPE(io) = IoTYPE_CLOSED; |
| 1785 | return retval; |
| 1786 | } |
| 1787 | |
| 1788 | bool |
| 1789 | Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail) |
| 1790 | { |
| 1791 | bool retval = FALSE; |
| 1792 | |
| 1793 | PERL_ARGS_ASSERT_IO_CLOSE; |
| 1794 | |
| 1795 | if (IoIFP(io)) { |
| 1796 | if (IoTYPE(io) == IoTYPE_PIPE) { |
| 1797 | PerlIO *fh = IoIFP(io); |
| 1798 | int status; |
| 1799 | |
| 1800 | /* my_pclose() can propagate signals which might bypass any code |
| 1801 | after the call here if the signal handler throws an exception. |
| 1802 | This would leave the handle in the IO object and try to close it again |
| 1803 | when the SV is destroyed on unwind or global destruction. |
| 1804 | So NULL it early. |
| 1805 | */ |
| 1806 | IoOFP(io) = IoIFP(io) = NULL; |
| 1807 | status = PerlProc_pclose(fh); |
| 1808 | if (not_implicit) { |
| 1809 | STATUS_NATIVE_CHILD_SET(status); |
| 1810 | retval = (STATUS_UNIX == 0); |
| 1811 | } |
| 1812 | else { |
| 1813 | retval = (status != -1); |
| 1814 | } |
| 1815 | } |
| 1816 | else if (IoTYPE(io) == IoTYPE_STD) |
| 1817 | retval = TRUE; |
| 1818 | else { |
| 1819 | if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */ |
| 1820 | const bool prev_err = PerlIO_error(IoOFP(io)); |
| 1821 | #ifdef USE_PERLIO |
| 1822 | if (prev_err) |
| 1823 | PerlIO_restore_errno(IoOFP(io)); |
| 1824 | #endif |
| 1825 | retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err); |
| 1826 | PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ |
| 1827 | } |
| 1828 | else { |
| 1829 | const bool prev_err = PerlIO_error(IoIFP(io)); |
| 1830 | #ifdef USE_PERLIO |
| 1831 | if (prev_err) |
| 1832 | PerlIO_restore_errno(IoIFP(io)); |
| 1833 | #endif |
| 1834 | retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err); |
| 1835 | } |
| 1836 | } |
| 1837 | IoOFP(io) = IoIFP(io) = NULL; |
| 1838 | |
| 1839 | if (warn_on_fail && !retval) { |
| 1840 | if (gv) |
| 1841 | Perl_ck_warner_d(aTHX_ packWARN(WARN_IO), |
| 1842 | "Warning: unable to close filehandle %" |
| 1843 | HEKf " properly: %" SVf, |
| 1844 | HEKfARG(GvNAME_HEK(gv)), |
| 1845 | SVfARG(get_sv("!",GV_ADD))); |
| 1846 | else |
| 1847 | Perl_ck_warner_d(aTHX_ packWARN(WARN_IO), |
| 1848 | "Warning: unable to close filehandle " |
| 1849 | "properly: %" SVf, |
| 1850 | SVfARG(get_sv("!",GV_ADD))); |
| 1851 | } |
| 1852 | } |
| 1853 | else if (not_implicit) { |
| 1854 | SETERRNO(EBADF,SS_IVCHAN); |
| 1855 | } |
| 1856 | |
| 1857 | return retval; |
| 1858 | } |
| 1859 | |
| 1860 | bool |
| 1861 | Perl_do_eof(pTHX_ GV *gv) |
| 1862 | { |
| 1863 | IO * const io = GvIO(gv); |
| 1864 | |
| 1865 | PERL_ARGS_ASSERT_DO_EOF; |
| 1866 | |
| 1867 | if (!io) |
| 1868 | return TRUE; |
| 1869 | else if (IoTYPE(io) == IoTYPE_WRONLY) |
| 1870 | report_wrongway_fh(gv, '>'); |
| 1871 | |
| 1872 | while (IoIFP(io)) { |
| 1873 | if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */ |
| 1874 | if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */ |
| 1875 | return FALSE; /* this is the most usual case */ |
| 1876 | } |
| 1877 | |
| 1878 | { |
| 1879 | /* getc and ungetc can stomp on errno */ |
| 1880 | dSAVE_ERRNO; |
| 1881 | const int ch = PerlIO_getc(IoIFP(io)); |
| 1882 | if (ch != EOF) { |
| 1883 | (void)PerlIO_ungetc(IoIFP(io),ch); |
| 1884 | RESTORE_ERRNO; |
| 1885 | return FALSE; |
| 1886 | } |
| 1887 | RESTORE_ERRNO; |
| 1888 | } |
| 1889 | |
| 1890 | if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) { |
| 1891 | if (PerlIO_get_cnt(IoIFP(io)) < -1) |
| 1892 | PerlIO_set_cnt(IoIFP(io),-1); |
| 1893 | } |
| 1894 | if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */ |
| 1895 | if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */ |
| 1896 | return TRUE; |
| 1897 | } |
| 1898 | else |
| 1899 | return TRUE; /* normal fp, definitely end of file */ |
| 1900 | } |
| 1901 | return TRUE; |
| 1902 | } |
| 1903 | |
| 1904 | Off_t |
| 1905 | Perl_do_tell(pTHX_ GV *gv) |
| 1906 | { |
| 1907 | IO *const io = GvIO(gv); |
| 1908 | PerlIO *fp; |
| 1909 | |
| 1910 | PERL_ARGS_ASSERT_DO_TELL; |
| 1911 | |
| 1912 | if (io && (fp = IoIFP(io))) { |
| 1913 | return PerlIO_tell(fp); |
| 1914 | } |
| 1915 | report_evil_fh(gv); |
| 1916 | SETERRNO(EBADF,RMS_IFI); |
| 1917 | return (Off_t)-1; |
| 1918 | } |
| 1919 | |
| 1920 | bool |
| 1921 | Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence) |
| 1922 | { |
| 1923 | IO *const io = GvIO(gv); |
| 1924 | PerlIO *fp; |
| 1925 | |
| 1926 | if (io && (fp = IoIFP(io))) { |
| 1927 | return PerlIO_seek(fp, pos, whence) >= 0; |
| 1928 | } |
| 1929 | report_evil_fh(gv); |
| 1930 | SETERRNO(EBADF,RMS_IFI); |
| 1931 | return FALSE; |
| 1932 | } |
| 1933 | |
| 1934 | Off_t |
| 1935 | Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence) |
| 1936 | { |
| 1937 | IO *const io = GvIO(gv); |
| 1938 | PerlIO *fp; |
| 1939 | |
| 1940 | PERL_ARGS_ASSERT_DO_SYSSEEK; |
| 1941 | |
| 1942 | if (io && (fp = IoIFP(io))) { |
| 1943 | int fd = PerlIO_fileno(fp); |
| 1944 | if (fd < 0 || (whence == SEEK_SET && pos < 0)) { |
| 1945 | SETERRNO(EINVAL,LIB_INVARG); |
| 1946 | return -1; |
| 1947 | } else { |
| 1948 | return PerlLIO_lseek(fd, pos, whence); |
| 1949 | } |
| 1950 | } |
| 1951 | report_evil_fh(gv); |
| 1952 | SETERRNO(EBADF,RMS_IFI); |
| 1953 | return (Off_t)-1; |
| 1954 | } |
| 1955 | |
| 1956 | int |
| 1957 | Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len) |
| 1958 | { |
| 1959 | int mode = O_BINARY; |
| 1960 | PERL_UNUSED_CONTEXT; |
| 1961 | if (s) { |
| 1962 | while (*s) { |
| 1963 | if (*s == ':') { |
| 1964 | switch (s[1]) { |
| 1965 | case 'r': |
| 1966 | if (s[2] == 'a' && s[3] == 'w' |
| 1967 | && (!s[4] || s[4] == ':' || isSPACE(s[4]))) |
| 1968 | { |
| 1969 | mode = O_BINARY; |
| 1970 | s += 4; |
| 1971 | len -= 4; |
| 1972 | break; |
| 1973 | } |
| 1974 | /* FALLTHROUGH */ |
| 1975 | case 'c': |
| 1976 | if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f' |
| 1977 | && (!s[5] || s[5] == ':' || isSPACE(s[5]))) |
| 1978 | { |
| 1979 | mode = O_TEXT; |
| 1980 | s += 5; |
| 1981 | len -= 5; |
| 1982 | break; |
| 1983 | } |
| 1984 | /* FALLTHROUGH */ |
| 1985 | default: |
| 1986 | goto fail_discipline; |
| 1987 | } |
| 1988 | } |
| 1989 | else if (isSPACE(*s)) { |
| 1990 | ++s; |
| 1991 | --len; |
| 1992 | } |
| 1993 | else { |
| 1994 | const char *end; |
| 1995 | fail_discipline: |
| 1996 | end = (char *) memchr(s+1, ':', len); |
| 1997 | if (!end) |
| 1998 | end = s+len; |
| 1999 | #ifndef PERLIO_LAYERS |
| 2000 | Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s); |
| 2001 | #else |
| 2002 | len -= end-s; |
| 2003 | s = end; |
| 2004 | #endif |
| 2005 | } |
| 2006 | } |
| 2007 | } |
| 2008 | return mode; |
| 2009 | } |
| 2010 | |
| 2011 | #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) |
| 2012 | I32 |
| 2013 | my_chsize(int fd, Off_t length) |
| 2014 | { |
| 2015 | #ifdef F_FREESP |
| 2016 | /* code courtesy of William Kucharski */ |
| 2017 | #define HAS_CHSIZE |
| 2018 | |
| 2019 | Stat_t filebuf; |
| 2020 | |
| 2021 | if (PerlLIO_fstat(fd, &filebuf) < 0) |
| 2022 | return -1; |
| 2023 | |
| 2024 | if (filebuf.st_size < length) { |
| 2025 | |
| 2026 | /* extend file length */ |
| 2027 | |
| 2028 | if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0) |
| 2029 | return -1; |
| 2030 | |
| 2031 | /* write a "0" byte */ |
| 2032 | |
| 2033 | if ((PerlLIO_write(fd, "", 1)) != 1) |
| 2034 | return -1; |
| 2035 | } |
| 2036 | else { |
| 2037 | /* truncate length */ |
| 2038 | struct flock fl; |
| 2039 | fl.l_whence = 0; |
| 2040 | fl.l_len = 0; |
| 2041 | fl.l_start = length; |
| 2042 | fl.l_type = F_WRLCK; /* write lock on file space */ |
| 2043 | |
| 2044 | /* |
| 2045 | * This relies on the UNDOCUMENTED F_FREESP argument to |
| 2046 | * fcntl(2), which truncates the file so that it ends at the |
| 2047 | * position indicated by fl.l_start. |
| 2048 | * |
| 2049 | * Will minor miracles never cease? |
| 2050 | */ |
| 2051 | |
| 2052 | if (fcntl(fd, F_FREESP, &fl) < 0) |
| 2053 | return -1; |
| 2054 | |
| 2055 | } |
| 2056 | return 0; |
| 2057 | #else |
| 2058 | Perl_croak_nocontext("truncate not implemented"); |
| 2059 | #endif /* F_FREESP */ |
| 2060 | return -1; |
| 2061 | } |
| 2062 | #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */ |
| 2063 | |
| 2064 | bool |
| 2065 | Perl_do_print(pTHX_ SV *sv, PerlIO *fp) |
| 2066 | { |
| 2067 | PERL_ARGS_ASSERT_DO_PRINT; |
| 2068 | |
| 2069 | /* assuming fp is checked earlier */ |
| 2070 | if (!sv) |
| 2071 | return TRUE; |
| 2072 | if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) { |
| 2073 | assert(!SvGMAGICAL(sv)); |
| 2074 | if (SvIsUV(sv)) |
| 2075 | PerlIO_printf(fp, "%" UVuf, (UV)SvUVX(sv)); |
| 2076 | else |
| 2077 | PerlIO_printf(fp, "%" IVdf, (IV)SvIVX(sv)); |
| 2078 | return !PerlIO_error(fp); |
| 2079 | } |
| 2080 | else { |
| 2081 | STRLEN len; |
| 2082 | /* Do this first to trigger any overloading. */ |
| 2083 | const char *tmps = SvPV_const(sv, len); |
| 2084 | U8 *tmpbuf = NULL; |
| 2085 | bool happy = TRUE; |
| 2086 | |
| 2087 | if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */ |
| 2088 | if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */ |
| 2089 | /* We don't modify the original scalar. */ |
| 2090 | tmpbuf = bytes_to_utf8((const U8*) tmps, &len); |
| 2091 | tmps = (char *) tmpbuf; |
| 2092 | } |
| 2093 | else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) { |
| 2094 | (void) check_utf8_print((const U8*) tmps, len); |
| 2095 | } |
| 2096 | } /* else stream isn't utf8 */ |
| 2097 | else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to |
| 2098 | convert to bytes */ |
| 2099 | STRLEN tmplen = len; |
| 2100 | bool utf8 = TRUE; |
| 2101 | U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8); |
| 2102 | if (!utf8) { |
| 2103 | |
| 2104 | /* Here, succeeded in downgrading from utf8. Set up to below |
| 2105 | * output the converted value */ |
| 2106 | tmpbuf = result; |
| 2107 | tmps = (char *) tmpbuf; |
| 2108 | len = tmplen; |
| 2109 | } |
| 2110 | else { /* Non-utf8 output stream, but string only representable in |
| 2111 | utf8 */ |
| 2112 | assert((char *)result == tmps); |
| 2113 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), |
| 2114 | "Wide character in %s", |
| 2115 | PL_op ? OP_DESC(PL_op) : "print" |
| 2116 | ); |
| 2117 | /* Could also check that isn't one of the things to avoid |
| 2118 | * in utf8 by using check_utf8_print(), but not doing so, |
| 2119 | * since the stream isn't a UTF8 stream */ |
| 2120 | } |
| 2121 | } |
| 2122 | /* To detect whether the process is about to overstep its |
| 2123 | * filesize limit we would need getrlimit(). We could then |
| 2124 | * also transparently raise the limit with setrlimit() -- |
| 2125 | * but only until the system hard limit/the filesystem limit, |
| 2126 | * at which we would get EPERM. Note that when using buffered |
| 2127 | * io the write failure can be delayed until the flush/close. --jhi */ |
| 2128 | if (len && (PerlIO_write(fp,tmps,len) == 0)) |
| 2129 | happy = FALSE; |
| 2130 | Safefree(tmpbuf); |
| 2131 | return happy ? !PerlIO_error(fp) : FALSE; |
| 2132 | } |
| 2133 | } |
| 2134 | |
| 2135 | I32 |
| 2136 | Perl_my_stat_flags(pTHX_ const U32 flags) |
| 2137 | { |
| 2138 | dSP; |
| 2139 | IO *io; |
| 2140 | GV* gv; |
| 2141 | |
| 2142 | if (PL_op->op_flags & OPf_REF) { |
| 2143 | gv = cGVOP_gv; |
| 2144 | do_fstat: |
| 2145 | if (gv == PL_defgv) { |
| 2146 | if (PL_laststatval < 0) |
| 2147 | SETERRNO(EBADF,RMS_IFI); |
| 2148 | return PL_laststatval; |
| 2149 | } |
| 2150 | io = GvIO(gv); |
| 2151 | do_fstat_have_io: |
| 2152 | PL_laststype = OP_STAT; |
| 2153 | PL_statgv = gv ? gv : (GV *)io; |
| 2154 | SvPVCLEAR(PL_statname); |
| 2155 | if (io) { |
| 2156 | if (IoIFP(io)) { |
| 2157 | int fd = PerlIO_fileno(IoIFP(io)); |
| 2158 | if (fd < 0) { |
| 2159 | /* E.g. PerlIO::scalar has no real fd. */ |
| 2160 | SETERRNO(EBADF,RMS_IFI); |
| 2161 | return (PL_laststatval = -1); |
| 2162 | } else { |
| 2163 | return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache)); |
| 2164 | } |
| 2165 | } else if (IoDIRP(io)) { |
| 2166 | return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache)); |
| 2167 | } |
| 2168 | } |
| 2169 | PL_laststatval = -1; |
| 2170 | report_evil_fh(gv); |
| 2171 | SETERRNO(EBADF,RMS_IFI); |
| 2172 | return -1; |
| 2173 | } |
| 2174 | else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t)) |
| 2175 | == OPpFT_STACKED) |
| 2176 | return PL_laststatval; |
| 2177 | else { |
| 2178 | SV* const sv = TOPs; |
| 2179 | const char *s, *d; |
| 2180 | STRLEN len; |
| 2181 | if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) { |
| 2182 | goto do_fstat; |
| 2183 | } |
| 2184 | else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) { |
| 2185 | io = MUTABLE_IO(SvRV(sv)); |
| 2186 | gv = NULL; |
| 2187 | goto do_fstat_have_io; |
| 2188 | } |
| 2189 | |
| 2190 | s = SvPV_flags_const(sv, len, flags); |
| 2191 | PL_statgv = NULL; |
| 2192 | sv_setpvn(PL_statname, s, len); |
| 2193 | d = SvPVX_const(PL_statname); /* s now NUL-terminated */ |
| 2194 | PL_laststype = OP_STAT; |
| 2195 | if (!IS_SAFE_PATHNAME(s, len, OP_NAME(PL_op))) { |
| 2196 | PL_laststatval = -1; |
| 2197 | } |
| 2198 | else { |
| 2199 | PL_laststatval = PerlLIO_stat(d, &PL_statcache); |
| 2200 | } |
| 2201 | if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) { |
| 2202 | GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */ |
| 2203 | Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat"); |
| 2204 | GCC_DIAG_RESTORE_STMT; |
| 2205 | } |
| 2206 | return PL_laststatval; |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | |
| 2211 | I32 |
| 2212 | Perl_my_lstat_flags(pTHX_ const U32 flags) |
| 2213 | { |
| 2214 | static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat"; |
| 2215 | dSP; |
| 2216 | const char *file; |
| 2217 | STRLEN len; |
| 2218 | SV* const sv = TOPs; |
| 2219 | bool isio = FALSE; |
| 2220 | if (PL_op->op_flags & OPf_REF) { |
| 2221 | if (cGVOP_gv == PL_defgv) { |
| 2222 | if (PL_laststype != OP_LSTAT) |
| 2223 | Perl_croak(aTHX_ "%s", no_prev_lstat); |
| 2224 | if (PL_laststatval < 0) |
| 2225 | SETERRNO(EBADF,RMS_IFI); |
| 2226 | return PL_laststatval; |
| 2227 | } |
| 2228 | PL_laststatval = -1; |
| 2229 | if (ckWARN(WARN_IO)) { |
| 2230 | /* diag_listed_as: Use of -l on filehandle%s */ |
| 2231 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 2232 | "Use of -l on filehandle %" HEKf, |
| 2233 | HEKfARG(GvENAME_HEK(cGVOP_gv))); |
| 2234 | } |
| 2235 | SETERRNO(EBADF,RMS_IFI); |
| 2236 | return -1; |
| 2237 | } |
| 2238 | if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t)) |
| 2239 | == OPpFT_STACKED) { |
| 2240 | if (PL_laststype != OP_LSTAT) |
| 2241 | Perl_croak(aTHX_ "%s", no_prev_lstat); |
| 2242 | return PL_laststatval; |
| 2243 | } |
| 2244 | |
| 2245 | PL_laststype = OP_LSTAT; |
| 2246 | PL_statgv = NULL; |
| 2247 | if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv)) |
| 2248 | || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) ) |
| 2249 | ) |
| 2250 | || isGV_with_GP(sv) |
| 2251 | ) |
| 2252 | && ckWARN(WARN_IO)) { |
| 2253 | if (isio) |
| 2254 | /* diag_listed_as: Use of -l on filehandle%s */ |
| 2255 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 2256 | "Use of -l on filehandle"); |
| 2257 | else |
| 2258 | /* diag_listed_as: Use of -l on filehandle%s */ |
| 2259 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 2260 | "Use of -l on filehandle %" HEKf, |
| 2261 | HEKfARG(GvENAME_HEK((const GV *) |
| 2262 | (SvROK(sv) ? SvRV(sv) : sv)))); |
| 2263 | } |
| 2264 | file = SvPV_flags_const(sv, len, flags); |
| 2265 | sv_setpv(PL_statname,file); |
| 2266 | if (!IS_SAFE_PATHNAME(file, len, OP_NAME(PL_op))) { |
| 2267 | PL_laststatval = -1; |
| 2268 | } |
| 2269 | else { |
| 2270 | PL_laststatval = PerlLIO_lstat(file,&PL_statcache); |
| 2271 | } |
| 2272 | if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) { |
| 2273 | GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */ |
| 2274 | Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat"); |
| 2275 | GCC_DIAG_RESTORE_STMT; |
| 2276 | } |
| 2277 | return PL_laststatval; |
| 2278 | } |
| 2279 | |
| 2280 | static void |
| 2281 | S_exec_failed(pTHX_ const char *cmd, int fd, int do_report) |
| 2282 | { |
| 2283 | const int e = errno; |
| 2284 | PERL_ARGS_ASSERT_EXEC_FAILED; |
| 2285 | |
| 2286 | if (ckWARN(WARN_EXEC)) |
| 2287 | Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", |
| 2288 | cmd, Strerror(e)); |
| 2289 | if (do_report) { |
| 2290 | /* XXX silently ignore failures */ |
| 2291 | PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int))); |
| 2292 | PerlLIO_close(fd); |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | bool |
| 2297 | Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp, |
| 2298 | int fd, int do_report) |
| 2299 | { |
| 2300 | dVAR; |
| 2301 | PERL_ARGS_ASSERT_DO_AEXEC5; |
| 2302 | #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__) |
| 2303 | Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system"); |
| 2304 | #else |
| 2305 | assert(sp >= mark); |
| 2306 | ENTER; |
| 2307 | { |
| 2308 | const char **argv, **a; |
| 2309 | const char *tmps = NULL; |
| 2310 | Newx(argv, sp - mark + 1, const char*); |
| 2311 | SAVEFREEPV(argv); |
| 2312 | a = argv; |
| 2313 | |
| 2314 | while (++mark <= sp) { |
| 2315 | if (*mark) { |
| 2316 | char *arg = savepv(SvPV_nolen_const(*mark)); |
| 2317 | SAVEFREEPV(arg); |
| 2318 | *a++ = arg; |
| 2319 | } else |
| 2320 | *a++ = ""; |
| 2321 | } |
| 2322 | *a = NULL; |
| 2323 | if (really) { |
| 2324 | tmps = savepv(SvPV_nolen_const(really)); |
| 2325 | SAVEFREEPV(tmps); |
| 2326 | } |
| 2327 | if ((!really && argv[0] && *argv[0] != '/') || |
| 2328 | (really && *tmps != '/')) /* will execvp use PATH? */ |
| 2329 | TAINT_ENV(); /* testing IFS here is overkill, probably */ |
| 2330 | PERL_FPU_PRE_EXEC |
| 2331 | if (really && *tmps) { |
| 2332 | PerlProc_execvp(tmps,EXEC_ARGV_CAST(argv)); |
| 2333 | } else if (argv[0]) { |
| 2334 | PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv)); |
| 2335 | } else { |
| 2336 | SETERRNO(ENOENT,RMS_FNF); |
| 2337 | } |
| 2338 | PERL_FPU_POST_EXEC |
| 2339 | S_exec_failed(aTHX_ (really ? tmps : argv[0] ? argv[0] : ""), fd, do_report); |
| 2340 | } |
| 2341 | LEAVE; |
| 2342 | #endif |
| 2343 | return FALSE; |
| 2344 | } |
| 2345 | |
| 2346 | #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION |
| 2347 | |
| 2348 | bool |
| 2349 | Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) |
| 2350 | { |
| 2351 | dVAR; |
| 2352 | const char **argv, **a; |
| 2353 | char *s; |
| 2354 | char *buf; |
| 2355 | char *cmd; |
| 2356 | /* Make a copy so we can change it */ |
| 2357 | const Size_t cmdlen = strlen(incmd) + 1; |
| 2358 | |
| 2359 | PERL_ARGS_ASSERT_DO_EXEC3; |
| 2360 | |
| 2361 | ENTER; |
| 2362 | Newx(buf, cmdlen, char); |
| 2363 | SAVEFREEPV(buf); |
| 2364 | cmd = buf; |
| 2365 | memcpy(cmd, incmd, cmdlen); |
| 2366 | |
| 2367 | while (*cmd && isSPACE(*cmd)) |
| 2368 | cmd++; |
| 2369 | |
| 2370 | /* save an extra exec if possible */ |
| 2371 | |
| 2372 | #ifdef CSH |
| 2373 | { |
| 2374 | char flags[PERL_FLAGS_MAX]; |
| 2375 | if (strnEQ(cmd,PL_cshname,PL_cshlen) && |
| 2376 | strBEGINs(cmd+PL_cshlen," -c")) { |
| 2377 | my_strlcpy(flags, "-c", PERL_FLAGS_MAX); |
| 2378 | s = cmd+PL_cshlen+3; |
| 2379 | if (*s == 'f') { |
| 2380 | s++; |
| 2381 | my_strlcat(flags, "f", PERL_FLAGS_MAX - 2); |
| 2382 | } |
| 2383 | if (*s == ' ') |
| 2384 | s++; |
| 2385 | if (*s++ == '\'') { |
| 2386 | char * const ncmd = s; |
| 2387 | |
| 2388 | while (*s) |
| 2389 | s++; |
| 2390 | if (s[-1] == '\n') |
| 2391 | *--s = '\0'; |
| 2392 | if (s[-1] == '\'') { |
| 2393 | *--s = '\0'; |
| 2394 | PERL_FPU_PRE_EXEC |
| 2395 | PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL); |
| 2396 | PERL_FPU_POST_EXEC |
| 2397 | *s = '\''; |
| 2398 | S_exec_failed(aTHX_ PL_cshname, fd, do_report); |
| 2399 | goto leave; |
| 2400 | } |
| 2401 | } |
| 2402 | } |
| 2403 | } |
| 2404 | #endif /* CSH */ |
| 2405 | |
| 2406 | /* see if there are shell metacharacters in it */ |
| 2407 | |
| 2408 | if (*cmd == '.' && isSPACE(cmd[1])) |
| 2409 | goto doshell; |
| 2410 | |
| 2411 | if (strBEGINs(cmd,"exec") && isSPACE(cmd[4])) |
| 2412 | goto doshell; |
| 2413 | |
| 2414 | s = cmd; |
| 2415 | while (isWORDCHAR(*s)) |
| 2416 | s++; /* catch VAR=val gizmo */ |
| 2417 | if (*s == '=') |
| 2418 | goto doshell; |
| 2419 | |
| 2420 | for (s = cmd; *s; s++) { |
| 2421 | if (*s != ' ' && !isALPHA(*s) && |
| 2422 | strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) { |
| 2423 | if (*s == '\n' && !s[1]) { |
| 2424 | *s = '\0'; |
| 2425 | break; |
| 2426 | } |
| 2427 | /* handle the 2>&1 construct at the end */ |
| 2428 | if (*s == '>' && s[1] == '&' && s[2] == '1' |
| 2429 | && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2]) |
| 2430 | && (!s[3] || isSPACE(s[3]))) |
| 2431 | { |
| 2432 | const char *t = s + 3; |
| 2433 | |
| 2434 | while (*t && isSPACE(*t)) |
| 2435 | ++t; |
| 2436 | if (!*t && (PerlLIO_dup2(1,2) != -1)) { |
| 2437 | s[-2] = '\0'; |
| 2438 | break; |
| 2439 | } |
| 2440 | } |
| 2441 | doshell: |
| 2442 | PERL_FPU_PRE_EXEC |
| 2443 | PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL); |
| 2444 | PERL_FPU_POST_EXEC |
| 2445 | S_exec_failed(aTHX_ PL_sh_path, fd, do_report); |
| 2446 | goto leave; |
| 2447 | } |
| 2448 | } |
| 2449 | |
| 2450 | Newx(argv, (s - cmd) / 2 + 2, const char*); |
| 2451 | SAVEFREEPV(argv); |
| 2452 | cmd = savepvn(cmd, s-cmd); |
| 2453 | SAVEFREEPV(cmd); |
| 2454 | a = argv; |
| 2455 | for (s = cmd; *s;) { |
| 2456 | while (isSPACE(*s)) |
| 2457 | s++; |
| 2458 | if (*s) |
| 2459 | *(a++) = s; |
| 2460 | while (*s && !isSPACE(*s)) |
| 2461 | s++; |
| 2462 | if (*s) |
| 2463 | *s++ = '\0'; |
| 2464 | } |
| 2465 | *a = NULL; |
| 2466 | if (argv[0]) { |
| 2467 | PERL_FPU_PRE_EXEC |
| 2468 | PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv)); |
| 2469 | PERL_FPU_POST_EXEC |
| 2470 | if (errno == ENOEXEC) /* for system V NIH syndrome */ |
| 2471 | goto doshell; |
| 2472 | S_exec_failed(aTHX_ argv[0], fd, do_report); |
| 2473 | } |
| 2474 | leave: |
| 2475 | LEAVE; |
| 2476 | return FALSE; |
| 2477 | } |
| 2478 | |
| 2479 | #endif /* OS2 || WIN32 */ |
| 2480 | |
| 2481 | I32 |
| 2482 | Perl_apply(pTHX_ I32 type, SV **mark, SV **sp) |
| 2483 | { |
| 2484 | I32 val; |
| 2485 | I32 tot = 0; |
| 2486 | const char *const what = PL_op_name[type]; |
| 2487 | const char *s; |
| 2488 | STRLEN len; |
| 2489 | SV ** const oldmark = mark; |
| 2490 | bool killgp = FALSE; |
| 2491 | |
| 2492 | PERL_ARGS_ASSERT_APPLY; |
| 2493 | |
| 2494 | PERL_UNUSED_VAR(what); /* may not be used depending on compile options */ |
| 2495 | |
| 2496 | /* Doing this ahead of the switch statement preserves the old behaviour, |
| 2497 | where attempting to use kill as a taint test test would fail on |
| 2498 | platforms where kill was not defined. */ |
| 2499 | #ifndef HAS_KILL |
| 2500 | if (type == OP_KILL) |
| 2501 | Perl_die(aTHX_ PL_no_func, what); |
| 2502 | #endif |
| 2503 | #ifndef HAS_CHOWN |
| 2504 | if (type == OP_CHOWN) |
| 2505 | Perl_die(aTHX_ PL_no_func, what); |
| 2506 | #endif |
| 2507 | |
| 2508 | |
| 2509 | #define APPLY_TAINT_PROPER() \ |
| 2510 | STMT_START { \ |
| 2511 | if (TAINT_get) { TAINT_PROPER(what); } \ |
| 2512 | } STMT_END |
| 2513 | |
| 2514 | /* This is a first heuristic; it doesn't catch tainting magic. */ |
| 2515 | if (TAINTING_get) { |
| 2516 | while (++mark <= sp) { |
| 2517 | if (SvTAINTED(*mark)) { |
| 2518 | TAINT; |
| 2519 | break; |
| 2520 | } |
| 2521 | } |
| 2522 | mark = oldmark; |
| 2523 | } |
| 2524 | switch (type) { |
| 2525 | case OP_CHMOD: |
| 2526 | APPLY_TAINT_PROPER(); |
| 2527 | if (++mark <= sp) { |
| 2528 | val = SvIV(*mark); |
| 2529 | APPLY_TAINT_PROPER(); |
| 2530 | tot = sp - mark; |
| 2531 | while (++mark <= sp) { |
| 2532 | GV* gv; |
| 2533 | if ((gv = MAYBE_DEREF_GV(*mark))) { |
| 2534 | if (GvIO(gv) && IoIFP(GvIOp(gv))) { |
| 2535 | #ifdef HAS_FCHMOD |
| 2536 | int fd = PerlIO_fileno(IoIFP(GvIOn(gv))); |
| 2537 | APPLY_TAINT_PROPER(); |
| 2538 | if (fd < 0) { |
| 2539 | SETERRNO(EBADF,RMS_IFI); |
| 2540 | tot--; |
| 2541 | } else if (fchmod(fd, val)) |
| 2542 | tot--; |
| 2543 | #else |
| 2544 | Perl_die(aTHX_ PL_no_func, "fchmod"); |
| 2545 | #endif |
| 2546 | } |
| 2547 | else { |
| 2548 | SETERRNO(EBADF,RMS_IFI); |
| 2549 | tot--; |
| 2550 | } |
| 2551 | } |
| 2552 | else { |
| 2553 | const char *name = SvPV_nomg_const(*mark, len); |
| 2554 | APPLY_TAINT_PROPER(); |
| 2555 | if (!IS_SAFE_PATHNAME(name, len, "chmod") || |
| 2556 | PerlLIO_chmod(name, val)) { |
| 2557 | tot--; |
| 2558 | } |
| 2559 | } |
| 2560 | } |
| 2561 | } |
| 2562 | break; |
| 2563 | #ifdef HAS_CHOWN |
| 2564 | case OP_CHOWN: |
| 2565 | APPLY_TAINT_PROPER(); |
| 2566 | if (sp - mark > 2) { |
| 2567 | I32 val2; |
| 2568 | val = SvIVx(*++mark); |
| 2569 | val2 = SvIVx(*++mark); |
| 2570 | APPLY_TAINT_PROPER(); |
| 2571 | tot = sp - mark; |
| 2572 | while (++mark <= sp) { |
| 2573 | GV* gv; |
| 2574 | if ((gv = MAYBE_DEREF_GV(*mark))) { |
| 2575 | if (GvIO(gv) && IoIFP(GvIOp(gv))) { |
| 2576 | #ifdef HAS_FCHOWN |
| 2577 | int fd = PerlIO_fileno(IoIFP(GvIOn(gv))); |
| 2578 | APPLY_TAINT_PROPER(); |
| 2579 | if (fd < 0) { |
| 2580 | SETERRNO(EBADF,RMS_IFI); |
| 2581 | tot--; |
| 2582 | } else if (fchown(fd, val, val2)) |
| 2583 | tot--; |
| 2584 | #else |
| 2585 | Perl_die(aTHX_ PL_no_func, "fchown"); |
| 2586 | #endif |
| 2587 | } |
| 2588 | else { |
| 2589 | SETERRNO(EBADF,RMS_IFI); |
| 2590 | tot--; |
| 2591 | } |
| 2592 | } |
| 2593 | else { |
| 2594 | const char *name = SvPV_nomg_const(*mark, len); |
| 2595 | APPLY_TAINT_PROPER(); |
| 2596 | if (!IS_SAFE_PATHNAME(name, len, "chown") || |
| 2597 | PerlLIO_chown(name, val, val2)) { |
| 2598 | tot--; |
| 2599 | } |
| 2600 | } |
| 2601 | } |
| 2602 | } |
| 2603 | break; |
| 2604 | #endif |
| 2605 | /* |
| 2606 | XXX Should we make lchown() directly available from perl? |
| 2607 | For now, we'll let Configure test for HAS_LCHOWN, but do |
| 2608 | nothing in the core. |
| 2609 | --AD 5/1998 |
| 2610 | */ |
| 2611 | #ifdef HAS_KILL |
| 2612 | case OP_KILL: |
| 2613 | APPLY_TAINT_PROPER(); |
| 2614 | if (mark == sp) |
| 2615 | break; |
| 2616 | s = SvPVx_const(*++mark, len); |
| 2617 | if (*s == '-' && isALPHA(s[1])) |
| 2618 | { |
| 2619 | s++; |
| 2620 | len--; |
| 2621 | killgp = TRUE; |
| 2622 | } |
| 2623 | if (isALPHA(*s)) { |
| 2624 | if (*s == 'S' && s[1] == 'I' && s[2] == 'G') { |
| 2625 | s += 3; |
| 2626 | len -= 3; |
| 2627 | } |
| 2628 | if ((val = whichsig_pvn(s, len)) < 0) |
| 2629 | Perl_croak(aTHX_ "Unrecognized signal name \"%" SVf "\"", |
| 2630 | SVfARG(*mark)); |
| 2631 | } |
| 2632 | else |
| 2633 | { |
| 2634 | val = SvIV(*mark); |
| 2635 | if (val < 0) |
| 2636 | { |
| 2637 | killgp = TRUE; |
| 2638 | val = -val; |
| 2639 | } |
| 2640 | } |
| 2641 | APPLY_TAINT_PROPER(); |
| 2642 | tot = sp - mark; |
| 2643 | |
| 2644 | while (++mark <= sp) { |
| 2645 | Pid_t proc; |
| 2646 | SvGETMAGIC(*mark); |
| 2647 | if (!(SvNIOK(*mark) || looks_like_number(*mark))) |
| 2648 | Perl_croak(aTHX_ "Can't kill a non-numeric process ID"); |
| 2649 | proc = SvIV_nomg(*mark); |
| 2650 | APPLY_TAINT_PROPER(); |
| 2651 | #ifdef HAS_KILLPG |
| 2652 | /* use killpg in preference, as the killpg() wrapper for Win32 |
| 2653 | * understands process groups, but the kill() wrapper doesn't */ |
| 2654 | if (killgp ? PerlProc_killpg(proc, val) |
| 2655 | : PerlProc_kill(proc, val)) |
| 2656 | #else |
| 2657 | if (PerlProc_kill(killgp ? -proc: proc, val)) |
| 2658 | #endif |
| 2659 | tot--; |
| 2660 | } |
| 2661 | PERL_ASYNC_CHECK(); |
| 2662 | break; |
| 2663 | #endif |
| 2664 | case OP_UNLINK: |
| 2665 | APPLY_TAINT_PROPER(); |
| 2666 | tot = sp - mark; |
| 2667 | while (++mark <= sp) { |
| 2668 | s = SvPV_const(*mark, len); |
| 2669 | APPLY_TAINT_PROPER(); |
| 2670 | if (!IS_SAFE_PATHNAME(s, len, "unlink")) { |
| 2671 | tot--; |
| 2672 | } |
| 2673 | else if (PL_unsafe) { |
| 2674 | if (UNLINK(s)) |
| 2675 | { |
| 2676 | tot--; |
| 2677 | } |
| 2678 | #if defined(__amigaos4__) && defined(NEWLIB) |
| 2679 | else |
| 2680 | { |
| 2681 | /* Under AmigaOS4 unlink only 'fails' if the |
| 2682 | * filename is invalid. It may not remove the file |
| 2683 | * if it's locked, so check if it's still around. */ |
| 2684 | if ((access(s,F_OK) != -1)) |
| 2685 | { |
| 2686 | tot--; |
| 2687 | } |
| 2688 | } |
| 2689 | #endif |
| 2690 | } |
| 2691 | else { /* don't let root wipe out directories without -U */ |
| 2692 | Stat_t statbuf; |
| 2693 | if (PerlLIO_lstat(s, &statbuf) < 0) |
| 2694 | tot--; |
| 2695 | else if (S_ISDIR(statbuf.st_mode)) { |
| 2696 | SETERRNO(EISDIR, SS_NOPRIV); |
| 2697 | tot--; |
| 2698 | } |
| 2699 | else { |
| 2700 | if (UNLINK(s)) |
| 2701 | { |
| 2702 | tot--; |
| 2703 | } |
| 2704 | #if defined(__amigaos4__) && defined(NEWLIB) |
| 2705 | else |
| 2706 | { |
| 2707 | /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */ |
| 2708 | /* It may not remove the file if it's Locked, so check if it's still */ |
| 2709 | /* arround */ |
| 2710 | if((access(s,F_OK) != -1)) |
| 2711 | { |
| 2712 | tot--; |
| 2713 | } |
| 2714 | } |
| 2715 | #endif |
| 2716 | } |
| 2717 | } |
| 2718 | } |
| 2719 | break; |
| 2720 | #if defined(HAS_UTIME) || defined(HAS_FUTIMES) |
| 2721 | case OP_UTIME: |
| 2722 | APPLY_TAINT_PROPER(); |
| 2723 | if (sp - mark > 2) { |
| 2724 | #if defined(HAS_FUTIMES) |
| 2725 | struct timeval utbuf[2]; |
| 2726 | void *utbufp = utbuf; |
| 2727 | #elif defined(I_UTIME) || defined(VMS) |
| 2728 | struct utimbuf utbuf; |
| 2729 | struct utimbuf *utbufp = &utbuf; |
| 2730 | #else |
| 2731 | struct { |
| 2732 | Time_t actime; |
| 2733 | Time_t modtime; |
| 2734 | } utbuf; |
| 2735 | void *utbufp = &utbuf; |
| 2736 | #endif |
| 2737 | |
| 2738 | SV* const accessed = *++mark; |
| 2739 | SV* const modified = *++mark; |
| 2740 | |
| 2741 | /* Be like C, and if both times are undefined, let the C |
| 2742 | * library figure out what to do. This usually means |
| 2743 | * "current time". */ |
| 2744 | |
| 2745 | if ( accessed == &PL_sv_undef && modified == &PL_sv_undef ) |
| 2746 | utbufp = NULL; |
| 2747 | else { |
| 2748 | Zero(&utbuf, sizeof utbuf, char); |
| 2749 | #ifdef HAS_FUTIMES |
| 2750 | utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */ |
| 2751 | utbuf[0].tv_usec = 0; |
| 2752 | utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */ |
| 2753 | utbuf[1].tv_usec = 0; |
| 2754 | #elif defined(BIG_TIME) |
| 2755 | utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */ |
| 2756 | utbuf.modtime = (Time_t)SvNV(modified); /* time modified */ |
| 2757 | #else |
| 2758 | utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */ |
| 2759 | utbuf.modtime = (Time_t)SvIV(modified); /* time modified */ |
| 2760 | #endif |
| 2761 | } |
| 2762 | APPLY_TAINT_PROPER(); |
| 2763 | tot = sp - mark; |
| 2764 | while (++mark <= sp) { |
| 2765 | GV* gv; |
| 2766 | if ((gv = MAYBE_DEREF_GV(*mark))) { |
| 2767 | if (GvIO(gv) && IoIFP(GvIOp(gv))) { |
| 2768 | #ifdef HAS_FUTIMES |
| 2769 | int fd = PerlIO_fileno(IoIFP(GvIOn(gv))); |
| 2770 | APPLY_TAINT_PROPER(); |
| 2771 | if (fd < 0) { |
| 2772 | SETERRNO(EBADF,RMS_IFI); |
| 2773 | tot--; |
| 2774 | } else if (futimes(fd, (struct timeval *) utbufp)) |
| 2775 | tot--; |
| 2776 | #else |
| 2777 | Perl_die(aTHX_ PL_no_func, "futimes"); |
| 2778 | #endif |
| 2779 | } |
| 2780 | else { |
| 2781 | tot--; |
| 2782 | } |
| 2783 | } |
| 2784 | else { |
| 2785 | const char * const name = SvPV_nomg_const(*mark, len); |
| 2786 | APPLY_TAINT_PROPER(); |
| 2787 | if (!IS_SAFE_PATHNAME(name, len, "utime")) { |
| 2788 | tot--; |
| 2789 | } |
| 2790 | else |
| 2791 | #ifdef HAS_FUTIMES |
| 2792 | if (utimes(name, (struct timeval *)utbufp)) |
| 2793 | #else |
| 2794 | if (PerlLIO_utime(name, utbufp)) |
| 2795 | #endif |
| 2796 | tot--; |
| 2797 | } |
| 2798 | |
| 2799 | } |
| 2800 | } |
| 2801 | else |
| 2802 | tot = 0; |
| 2803 | break; |
| 2804 | #endif |
| 2805 | } |
| 2806 | return tot; |
| 2807 | |
| 2808 | #undef APPLY_TAINT_PROPER |
| 2809 | } |
| 2810 | |
| 2811 | /* Do the permissions in *statbufp allow some operation? */ |
| 2812 | #ifndef VMS /* VMS' cando is in vms.c */ |
| 2813 | bool |
| 2814 | Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp) |
| 2815 | /* effective is a flag, true for EUID, or for checking if the effective gid |
| 2816 | * is in the list of groups returned from getgroups(). |
| 2817 | */ |
| 2818 | { |
| 2819 | PERL_ARGS_ASSERT_CANDO; |
| 2820 | PERL_UNUSED_CONTEXT; |
| 2821 | |
| 2822 | #ifdef DOSISH |
| 2823 | /* [Comments and code from Len Reed] |
| 2824 | * MS-DOS "user" is similar to UNIX's "superuser," but can't write |
| 2825 | * to write-protected files. The execute permission bit is set |
| 2826 | * by the Microsoft C library stat() function for the following: |
| 2827 | * .exe files |
| 2828 | * .com files |
| 2829 | * .bat files |
| 2830 | * directories |
| 2831 | * All files and directories are readable. |
| 2832 | * Directories and special files, e.g. "CON", cannot be |
| 2833 | * write-protected. |
| 2834 | * [Comment by Tom Dinger -- a directory can have the write-protect |
| 2835 | * bit set in the file system, but DOS permits changes to |
| 2836 | * the directory anyway. In addition, all bets are off |
| 2837 | * here for networked software, such as Novell and |
| 2838 | * Sun's PC-NFS.] |
| 2839 | */ |
| 2840 | |
| 2841 | /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat |
| 2842 | * too so it will actually look into the files for magic numbers |
| 2843 | */ |
| 2844 | return cBOOL(mode & statbufp->st_mode); |
| 2845 | |
| 2846 | #else /* ! DOSISH */ |
| 2847 | # ifdef __CYGWIN__ |
| 2848 | if (ingroup(544,effective)) { /* member of Administrators */ |
| 2849 | # else |
| 2850 | if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */ |
| 2851 | # endif |
| 2852 | if (mode == S_IXUSR) { |
| 2853 | if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode)) |
| 2854 | return TRUE; |
| 2855 | } |
| 2856 | else |
| 2857 | return TRUE; /* root reads and writes anything */ |
| 2858 | return FALSE; |
| 2859 | } |
| 2860 | if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) { |
| 2861 | if (statbufp->st_mode & mode) |
| 2862 | return TRUE; /* ok as "user" */ |
| 2863 | } |
| 2864 | else if (ingroup(statbufp->st_gid,effective)) { |
| 2865 | if (statbufp->st_mode & mode >> 3) |
| 2866 | return TRUE; /* ok as "group" */ |
| 2867 | } |
| 2868 | else if (statbufp->st_mode & mode >> 6) |
| 2869 | return TRUE; /* ok as "other" */ |
| 2870 | return FALSE; |
| 2871 | #endif /* ! DOSISH */ |
| 2872 | } |
| 2873 | #endif /* ! VMS */ |
| 2874 | |
| 2875 | static bool |
| 2876 | S_ingroup(pTHX_ Gid_t testgid, bool effective) |
| 2877 | { |
| 2878 | #ifndef PERL_IMPLICIT_SYS |
| 2879 | /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */ |
| 2880 | PERL_UNUSED_CONTEXT; |
| 2881 | #endif |
| 2882 | if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid())) |
| 2883 | return TRUE; |
| 2884 | #ifdef HAS_GETGROUPS |
| 2885 | { |
| 2886 | Groups_t *gary = NULL; |
| 2887 | I32 anum; |
| 2888 | bool rc = FALSE; |
| 2889 | |
| 2890 | anum = getgroups(0, gary); |
| 2891 | if (anum > 0) { |
| 2892 | Newx(gary, anum, Groups_t); |
| 2893 | anum = getgroups(anum, gary); |
| 2894 | while (--anum >= 0) |
| 2895 | if (gary[anum] == testgid) { |
| 2896 | rc = TRUE; |
| 2897 | break; |
| 2898 | } |
| 2899 | |
| 2900 | Safefree(gary); |
| 2901 | } |
| 2902 | return rc; |
| 2903 | } |
| 2904 | #else |
| 2905 | return FALSE; |
| 2906 | #endif |
| 2907 | } |
| 2908 | |
| 2909 | #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) |
| 2910 | |
| 2911 | I32 |
| 2912 | Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp) |
| 2913 | { |
| 2914 | const key_t key = (key_t)SvNVx(*++mark); |
| 2915 | SV *nsv = optype == OP_MSGGET ? NULL : *++mark; |
| 2916 | const I32 flags = SvIVx(*++mark); |
| 2917 | |
| 2918 | PERL_ARGS_ASSERT_DO_IPCGET; |
| 2919 | PERL_UNUSED_ARG(sp); |
| 2920 | |
| 2921 | SETERRNO(0,0); |
| 2922 | switch (optype) |
| 2923 | { |
| 2924 | #ifdef HAS_MSG |
| 2925 | case OP_MSGGET: |
| 2926 | return msgget(key, flags); |
| 2927 | #endif |
| 2928 | #ifdef HAS_SEM |
| 2929 | case OP_SEMGET: |
| 2930 | return semget(key, (int) SvIV(nsv), flags); |
| 2931 | #endif |
| 2932 | #ifdef HAS_SHM |
| 2933 | case OP_SHMGET: |
| 2934 | return shmget(key, (size_t) SvUV(nsv), flags); |
| 2935 | #endif |
| 2936 | #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) |
| 2937 | default: |
| 2938 | /* diag_listed_as: msg%s not implemented */ |
| 2939 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 2940 | #endif |
| 2941 | } |
| 2942 | return -1; /* should never happen */ |
| 2943 | } |
| 2944 | |
| 2945 | I32 |
| 2946 | Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp) |
| 2947 | { |
| 2948 | char *a; |
| 2949 | I32 ret = -1; |
| 2950 | const I32 id = SvIVx(*++mark); |
| 2951 | #ifdef Semctl |
| 2952 | const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0; |
| 2953 | #endif |
| 2954 | const I32 cmd = SvIVx(*++mark); |
| 2955 | SV * const astr = *++mark; |
| 2956 | STRLEN infosize = 0; |
| 2957 | I32 getinfo = (cmd == IPC_STAT); |
| 2958 | |
| 2959 | PERL_ARGS_ASSERT_DO_IPCCTL; |
| 2960 | PERL_UNUSED_ARG(sp); |
| 2961 | |
| 2962 | switch (optype) |
| 2963 | { |
| 2964 | #ifdef HAS_MSG |
| 2965 | case OP_MSGCTL: |
| 2966 | if (cmd == IPC_STAT || cmd == IPC_SET) |
| 2967 | infosize = sizeof(struct msqid_ds); |
| 2968 | break; |
| 2969 | #endif |
| 2970 | #ifdef HAS_SHM |
| 2971 | case OP_SHMCTL: |
| 2972 | if (cmd == IPC_STAT || cmd == IPC_SET) |
| 2973 | infosize = sizeof(struct shmid_ds); |
| 2974 | break; |
| 2975 | #endif |
| 2976 | #ifdef HAS_SEM |
| 2977 | case OP_SEMCTL: |
| 2978 | #ifdef Semctl |
| 2979 | if (cmd == IPC_STAT || cmd == IPC_SET) |
| 2980 | infosize = sizeof(struct semid_ds); |
| 2981 | else if (cmd == GETALL || cmd == SETALL) |
| 2982 | { |
| 2983 | struct semid_ds semds; |
| 2984 | union semun semun; |
| 2985 | #ifdef EXTRA_F_IN_SEMUN_BUF |
| 2986 | semun.buff = &semds; |
| 2987 | #else |
| 2988 | semun.buf = &semds; |
| 2989 | #endif |
| 2990 | getinfo = (cmd == GETALL); |
| 2991 | if (Semctl(id, 0, IPC_STAT, semun) == -1) |
| 2992 | return -1; |
| 2993 | infosize = semds.sem_nsems * sizeof(short); |
| 2994 | /* "short" is technically wrong but much more portable |
| 2995 | than guessing about u_?short(_t)? */ |
| 2996 | } |
| 2997 | #else |
| 2998 | /* diag_listed_as: sem%s not implemented */ |
| 2999 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 3000 | #endif |
| 3001 | break; |
| 3002 | #endif |
| 3003 | #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) |
| 3004 | default: |
| 3005 | /* diag_listed_as: shm%s not implemented */ |
| 3006 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 3007 | #endif |
| 3008 | } |
| 3009 | |
| 3010 | if (infosize) |
| 3011 | { |
| 3012 | if (getinfo) |
| 3013 | { |
| 3014 | SvPV_force_nolen(astr); |
| 3015 | a = SvGROW(astr, infosize+1); |
| 3016 | } |
| 3017 | else |
| 3018 | { |
| 3019 | STRLEN len; |
| 3020 | a = SvPV(astr, len); |
| 3021 | if (len != infosize) |
| 3022 | Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld", |
| 3023 | PL_op_desc[optype], |
| 3024 | (unsigned long)len, |
| 3025 | (long)infosize); |
| 3026 | } |
| 3027 | } |
| 3028 | else |
| 3029 | { |
| 3030 | const IV i = SvIV(astr); |
| 3031 | a = INT2PTR(char *,i); /* ouch */ |
| 3032 | } |
| 3033 | SETERRNO(0,0); |
| 3034 | switch (optype) |
| 3035 | { |
| 3036 | #ifdef HAS_MSG |
| 3037 | case OP_MSGCTL: |
| 3038 | ret = msgctl(id, cmd, (struct msqid_ds *)a); |
| 3039 | break; |
| 3040 | #endif |
| 3041 | #ifdef HAS_SEM |
| 3042 | case OP_SEMCTL: { |
| 3043 | #ifdef Semctl |
| 3044 | union semun unsemds; |
| 3045 | |
| 3046 | if(cmd == SETVAL) { |
| 3047 | unsemds.val = PTR2nat(a); |
| 3048 | } |
| 3049 | else { |
| 3050 | #ifdef EXTRA_F_IN_SEMUN_BUF |
| 3051 | unsemds.buff = (struct semid_ds *)a; |
| 3052 | #else |
| 3053 | unsemds.buf = (struct semid_ds *)a; |
| 3054 | #endif |
| 3055 | } |
| 3056 | ret = Semctl(id, n, cmd, unsemds); |
| 3057 | #else |
| 3058 | /* diag_listed_as: sem%s not implemented */ |
| 3059 | Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); |
| 3060 | #endif |
| 3061 | } |
| 3062 | break; |
| 3063 | #endif |
| 3064 | #ifdef HAS_SHM |
| 3065 | case OP_SHMCTL: |
| 3066 | ret = shmctl(id, cmd, (struct shmid_ds *)a); |
| 3067 | break; |
| 3068 | #endif |
| 3069 | } |
| 3070 | if (getinfo && ret >= 0) { |
| 3071 | SvCUR_set(astr, infosize); |
| 3072 | *SvEND(astr) = '\0'; |
| 3073 | SvSETMAGIC(astr); |
| 3074 | } |
| 3075 | return ret; |
| 3076 | } |
| 3077 | |
| 3078 | I32 |
| 3079 | Perl_do_msgsnd(pTHX_ SV **mark, SV **sp) |
| 3080 | { |
| 3081 | #ifdef HAS_MSG |
| 3082 | STRLEN len; |
| 3083 | const I32 id = SvIVx(*++mark); |
| 3084 | SV * const mstr = *++mark; |
| 3085 | const I32 flags = SvIVx(*++mark); |
| 3086 | const char * const mbuf = SvPV_const(mstr, len); |
| 3087 | const I32 msize = len - sizeof(long); |
| 3088 | |
| 3089 | PERL_ARGS_ASSERT_DO_MSGSND; |
| 3090 | PERL_UNUSED_ARG(sp); |
| 3091 | |
| 3092 | if (msize < 0) |
| 3093 | Perl_croak(aTHX_ "Arg too short for msgsnd"); |
| 3094 | SETERRNO(0,0); |
| 3095 | if (id >= 0 && flags >= 0) { |
| 3096 | return msgsnd(id, (struct msgbuf *)mbuf, msize, flags); |
| 3097 | } else { |
| 3098 | SETERRNO(EINVAL,LIB_INVARG); |
| 3099 | return -1; |
| 3100 | } |
| 3101 | #else |
| 3102 | PERL_UNUSED_ARG(sp); |
| 3103 | PERL_UNUSED_ARG(mark); |
| 3104 | /* diag_listed_as: msg%s not implemented */ |
| 3105 | Perl_croak(aTHX_ "msgsnd not implemented"); |
| 3106 | return -1; |
| 3107 | #endif |
| 3108 | } |
| 3109 | |
| 3110 | I32 |
| 3111 | Perl_do_msgrcv(pTHX_ SV **mark, SV **sp) |
| 3112 | { |
| 3113 | #ifdef HAS_MSG |
| 3114 | char *mbuf; |
| 3115 | long mtype; |
| 3116 | I32 msize, flags, ret; |
| 3117 | const I32 id = SvIVx(*++mark); |
| 3118 | SV * const mstr = *++mark; |
| 3119 | |
| 3120 | PERL_ARGS_ASSERT_DO_MSGRCV; |
| 3121 | PERL_UNUSED_ARG(sp); |
| 3122 | |
| 3123 | /* suppress warning when reading into undef var --jhi */ |
| 3124 | if (! SvOK(mstr)) |
| 3125 | SvPVCLEAR(mstr); |
| 3126 | msize = SvIVx(*++mark); |
| 3127 | mtype = (long)SvIVx(*++mark); |
| 3128 | flags = SvIVx(*++mark); |
| 3129 | SvPV_force_nolen(mstr); |
| 3130 | mbuf = SvGROW(mstr, sizeof(long)+msize+1); |
| 3131 | |
| 3132 | SETERRNO(0,0); |
| 3133 | if (id >= 0 && msize >= 0 && flags >= 0) { |
| 3134 | ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags); |
| 3135 | } else { |
| 3136 | SETERRNO(EINVAL,LIB_INVARG); |
| 3137 | ret = -1; |
| 3138 | } |
| 3139 | if (ret >= 0) { |
| 3140 | SvCUR_set(mstr, sizeof(long)+ret); |
| 3141 | *SvEND(mstr) = '\0'; |
| 3142 | /* who knows who has been playing with this message? */ |
| 3143 | SvTAINTED_on(mstr); |
| 3144 | } |
| 3145 | return ret; |
| 3146 | #else |
| 3147 | PERL_UNUSED_ARG(sp); |
| 3148 | PERL_UNUSED_ARG(mark); |
| 3149 | /* diag_listed_as: msg%s not implemented */ |
| 3150 | Perl_croak(aTHX_ "msgrcv not implemented"); |
| 3151 | return -1; |
| 3152 | #endif |
| 3153 | } |
| 3154 | |
| 3155 | I32 |
| 3156 | Perl_do_semop(pTHX_ SV **mark, SV **sp) |
| 3157 | { |
| 3158 | #ifdef HAS_SEM |
| 3159 | STRLEN opsize; |
| 3160 | const I32 id = SvIVx(*++mark); |
| 3161 | SV * const opstr = *++mark; |
| 3162 | const char * const opbuf = SvPV_const(opstr, opsize); |
| 3163 | |
| 3164 | PERL_ARGS_ASSERT_DO_SEMOP; |
| 3165 | PERL_UNUSED_ARG(sp); |
| 3166 | |
| 3167 | if (opsize < 3 * SHORTSIZE |
| 3168 | || (opsize % (3 * SHORTSIZE))) { |
| 3169 | SETERRNO(EINVAL,LIB_INVARG); |
| 3170 | return -1; |
| 3171 | } |
| 3172 | SETERRNO(0,0); |
| 3173 | /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */ |
| 3174 | { |
| 3175 | const int nsops = opsize / (3 * sizeof (short)); |
| 3176 | int i = nsops; |
| 3177 | short * const ops = (short *) opbuf; |
| 3178 | short *o = ops; |
| 3179 | struct sembuf *temps, *t; |
| 3180 | I32 result; |
| 3181 | |
| 3182 | Newx (temps, nsops, struct sembuf); |
| 3183 | t = temps; |
| 3184 | while (i--) { |
| 3185 | t->sem_num = *o++; |
| 3186 | t->sem_op = *o++; |
| 3187 | t->sem_flg = *o++; |
| 3188 | t++; |
| 3189 | } |
| 3190 | result = semop(id, temps, nsops); |
| 3191 | Safefree(temps); |
| 3192 | return result; |
| 3193 | } |
| 3194 | #else |
| 3195 | /* diag_listed_as: sem%s not implemented */ |
| 3196 | Perl_croak(aTHX_ "semop not implemented"); |
| 3197 | #endif |
| 3198 | } |
| 3199 | |
| 3200 | I32 |
| 3201 | Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp) |
| 3202 | { |
| 3203 | #ifdef HAS_SHM |
| 3204 | char *shm; |
| 3205 | struct shmid_ds shmds; |
| 3206 | const I32 id = SvIVx(*++mark); |
| 3207 | SV * const mstr = *++mark; |
| 3208 | const I32 mpos = SvIVx(*++mark); |
| 3209 | const I32 msize = SvIVx(*++mark); |
| 3210 | |
| 3211 | PERL_ARGS_ASSERT_DO_SHMIO; |
| 3212 | PERL_UNUSED_ARG(sp); |
| 3213 | |
| 3214 | SETERRNO(0,0); |
| 3215 | if (shmctl(id, IPC_STAT, &shmds) == -1) |
| 3216 | return -1; |
| 3217 | if (mpos < 0 || msize < 0 |
| 3218 | || (size_t)mpos + msize > (size_t)shmds.shm_segsz) { |
| 3219 | SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */ |
| 3220 | return -1; |
| 3221 | } |
| 3222 | if (id >= 0) { |
| 3223 | shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0); |
| 3224 | } else { |
| 3225 | SETERRNO(EINVAL,LIB_INVARG); |
| 3226 | return -1; |
| 3227 | } |
| 3228 | if (shm == (char *)-1) /* I hate System V IPC, I really do */ |
| 3229 | return -1; |
| 3230 | if (optype == OP_SHMREAD) { |
| 3231 | char *mbuf; |
| 3232 | /* suppress warning when reading into undef var (tchrist 3/Mar/00) */ |
| 3233 | SvGETMAGIC(mstr); |
| 3234 | SvUPGRADE(mstr, SVt_PV); |
| 3235 | if (! SvOK(mstr)) |
| 3236 | SvPVCLEAR(mstr); |
| 3237 | SvPOK_only(mstr); |
| 3238 | mbuf = SvGROW(mstr, (STRLEN)msize+1); |
| 3239 | |
| 3240 | Copy(shm + mpos, mbuf, msize, char); |
| 3241 | SvCUR_set(mstr, msize); |
| 3242 | *SvEND(mstr) = '\0'; |
| 3243 | SvSETMAGIC(mstr); |
| 3244 | /* who knows who has been playing with this shared memory? */ |
| 3245 | SvTAINTED_on(mstr); |
| 3246 | } |
| 3247 | else { |
| 3248 | STRLEN len; |
| 3249 | |
| 3250 | const char *mbuf = SvPV_const(mstr, len); |
| 3251 | const I32 n = ((I32)len > msize) ? msize : (I32)len; |
| 3252 | Copy(mbuf, shm + mpos, n, char); |
| 3253 | if (n < msize) |
| 3254 | memzero(shm + mpos + n, msize - n); |
| 3255 | } |
| 3256 | return shmdt(shm); |
| 3257 | #else |
| 3258 | /* diag_listed_as: shm%s not implemented */ |
| 3259 | Perl_croak(aTHX_ "shm I/O not implemented"); |
| 3260 | return -1; |
| 3261 | #endif |
| 3262 | } |
| 3263 | |
| 3264 | #endif /* SYSV IPC */ |
| 3265 | |
| 3266 | /* |
| 3267 | =head1 IO Functions |
| 3268 | |
| 3269 | =for apidoc start_glob |
| 3270 | |
| 3271 | Function called by C<do_readline> to spawn a glob (or do the glob inside |
| 3272 | perl on VMS). This code used to be inline, but now perl uses C<File::Glob> |
| 3273 | this glob starter is only used by miniperl during the build process, |
| 3274 | or when PERL_EXTERNAL_GLOB is defined. |
| 3275 | Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up. |
| 3276 | |
| 3277 | =cut |
| 3278 | */ |
| 3279 | |
| 3280 | PerlIO * |
| 3281 | Perl_start_glob (pTHX_ SV *tmpglob, IO *io) |
| 3282 | { |
| 3283 | SV * const tmpcmd = newSV(0); |
| 3284 | PerlIO *fp; |
| 3285 | STRLEN len; |
| 3286 | const char *s = SvPV(tmpglob, len); |
| 3287 | |
| 3288 | PERL_ARGS_ASSERT_START_GLOB; |
| 3289 | |
| 3290 | if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob")) |
| 3291 | return NULL; |
| 3292 | |
| 3293 | ENTER; |
| 3294 | SAVEFREESV(tmpcmd); |
| 3295 | #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */ |
| 3296 | /* since spawning off a process is a real performance hit */ |
| 3297 | |
| 3298 | PerlIO * |
| 3299 | Perl_vms_start_glob |
| 3300 | (pTHX_ SV *tmpglob, |
| 3301 | IO *io); |
| 3302 | |
| 3303 | fp = Perl_vms_start_glob(aTHX_ tmpglob, io); |
| 3304 | |
| 3305 | #else /* !VMS */ |
| 3306 | # ifdef DOSISH |
| 3307 | # if defined(OS2) |
| 3308 | sv_setpv(tmpcmd, "for a in "); |
| 3309 | sv_catsv(tmpcmd, tmpglob); |
| 3310 | sv_catpvs(tmpcmd, "; do echo \"$a\\0\\c\"; done |"); |
| 3311 | # elif defined(DJGPP) |
| 3312 | sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */ |
| 3313 | sv_catsv(tmpcmd, tmpglob); |
| 3314 | # else |
| 3315 | sv_setpv(tmpcmd, "perlglob "); |
| 3316 | sv_catsv(tmpcmd, tmpglob); |
| 3317 | sv_catpvs(tmpcmd, " |"); |
| 3318 | # endif |
| 3319 | # elif defined(CSH) |
| 3320 | sv_setpvn(tmpcmd, PL_cshname, PL_cshlen); |
| 3321 | sv_catpvs(tmpcmd, " -cf 'set nonomatch; glob "); |
| 3322 | sv_catsv(tmpcmd, tmpglob); |
| 3323 | sv_catpvs(tmpcmd, "' 2>/dev/null |"); |
| 3324 | # else |
| 3325 | sv_setpv(tmpcmd, "echo "); |
| 3326 | sv_catsv(tmpcmd, tmpglob); |
| 3327 | sv_catpvs(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|"); |
| 3328 | # endif /* !DOSISH && !CSH */ |
| 3329 | { |
| 3330 | SV ** const svp = hv_fetchs(GvHVn(PL_envgv), "LS_COLORS", 0); |
| 3331 | if (svp && *svp) |
| 3332 | save_helem_flags(GvHV(PL_envgv), |
| 3333 | newSVpvs_flags("LS_COLORS", SVs_TEMP), svp, |
| 3334 | SAVEf_SETMAGIC); |
| 3335 | } |
| 3336 | (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd), |
| 3337 | NULL, NULL, 0); |
| 3338 | fp = IoIFP(io); |
| 3339 | #endif /* !VMS */ |
| 3340 | LEAVE; |
| 3341 | |
| 3342 | if (!fp && ckWARN(WARN_GLOB)) { |
| 3343 | Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)", |
| 3344 | Strerror(errno)); |
| 3345 | } |
| 3346 | |
| 3347 | return fp; |
| 3348 | } |
| 3349 | |
| 3350 | /* |
| 3351 | * ex: set ts=8 sts=4 sw=4 et: |
| 3352 | */ |