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 bool 64 Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, 65 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp, 66 I32 num_svs) 67 { 68 dVAR; 69 register IO * const io = GvIOn(gv); 70 PerlIO *saveifp = NULL; 71 PerlIO *saveofp = NULL; 72 int savefd = -1; 73 char savetype = IoTYPE_CLOSED; 74 int writing = 0; 75 PerlIO *fp; 76 int fd; 77 int result; 78 bool was_fdopen = FALSE; 79 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0; 80 char *type = NULL; 81 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */ 82 SV *namesv; 83 84 PERL_ARGS_ASSERT_DO_OPENN; 85 86 Zero(mode,sizeof(mode),char); 87 PL_forkprocess = 1; /* assume true if no fork */ 88 89 /* Collect default raw/crlf info from the op */ 90 if (PL_op && PL_op->op_type == OP_OPEN) { 91 /* set up IO layers */ 92 const U8 flags = PL_op->op_private; 93 in_raw = (flags & OPpOPEN_IN_RAW); 94 in_crlf = (flags & OPpOPEN_IN_CRLF); 95 out_raw = (flags & OPpOPEN_OUT_RAW); 96 out_crlf = (flags & OPpOPEN_OUT_CRLF); 97 } 98 99 /* If currently open - close before we re-open */ 100 if (IoIFP(io)) { 101 fd = PerlIO_fileno(IoIFP(io)); 102 if (IoTYPE(io) == IoTYPE_STD) { 103 /* This is a clone of one of STD* handles */ 104 result = 0; 105 } 106 else if (fd >= 0 && fd <= PL_maxsysfd) { 107 /* This is one of the original STD* handles */ 108 saveifp = IoIFP(io); 109 saveofp = IoOFP(io); 110 savetype = IoTYPE(io); 111 savefd = fd; 112 result = 0; 113 } 114 else if (IoTYPE(io) == IoTYPE_PIPE) 115 result = PerlProc_pclose(IoIFP(io)); 116 else if (IoIFP(io) != IoOFP(io)) { 117 if (IoOFP(io)) { 118 result = PerlIO_close(IoOFP(io)); 119 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ 120 } 121 else 122 result = PerlIO_close(IoIFP(io)); 123 } 124 else 125 result = PerlIO_close(IoIFP(io)); 126 if (result == EOF && fd > PL_maxsysfd) { 127 /* Why is this not Perl_warn*() call ? */ 128 PerlIO_printf(Perl_error_log, 129 "Warning: unable to close filehandle %s properly.\n", 130 GvENAME(gv)); 131 } 132 IoOFP(io) = IoIFP(io) = NULL; 133 } 134 135 if (as_raw) { 136 /* sysopen style args, i.e. integer mode and permissions */ 137 STRLEN ix = 0; 138 const int appendtrunc = 139 0 140 #ifdef O_APPEND /* Not fully portable. */ 141 |O_APPEND 142 #endif 143 #ifdef O_TRUNC /* Not fully portable. */ 144 |O_TRUNC 145 #endif 146 ; 147 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc; 148 int ismodifying; 149 150 if (num_svs != 0) { 151 Perl_croak(aTHX_ "panic: sysopen with multiple args"); 152 } 153 /* It's not always 154 155 O_RDONLY 0 156 O_WRONLY 1 157 O_RDWR 2 158 159 It might be (in OS/390 and Mac OS Classic it is) 160 161 O_WRONLY 1 162 O_RDONLY 2 163 O_RDWR 3 164 165 This means that simple & with O_RDWR would look 166 like O_RDONLY is present. Therefore we have to 167 be more careful. 168 */ 169 if ((ismodifying = (rawmode & modifyingmode))) { 170 if ((ismodifying & O_WRONLY) == O_WRONLY || 171 (ismodifying & O_RDWR) == O_RDWR || 172 (ismodifying & (O_CREAT|appendtrunc))) 173 TAINT_PROPER("sysopen"); 174 } 175 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */ 176 177 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE) 178 rawmode |= O_LARGEFILE; /* Transparently largefiley. */ 179 #endif 180 181 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing); 182 183 namesv = newSVpvn_flags(oname, len, SVs_TEMP); 184 num_svs = 1; 185 svp = &namesv; 186 type = NULL; 187 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp); 188 } 189 else { 190 /* Regular (non-sys) open */ 191 char *name; 192 STRLEN olen = len; 193 char *tend; 194 int dodup = 0; 195 196 type = savepvn(oname, len); 197 tend = type+len; 198 SAVEFREEPV(type); 199 200 /* Lose leading and trailing white space */ 201 while (isSPACE(*type)) 202 type++; 203 while (tend > type && isSPACE(tend[-1])) 204 *--tend = '\0'; 205 206 if (num_svs) { 207 /* New style explicit name, type is just mode and layer info */ 208 #ifdef USE_STDIO 209 if (SvROK(*svp) && !strchr(oname,'&')) { 210 if (ckWARN(WARN_IO)) 211 Perl_warner(aTHX_ packWARN(WARN_IO), 212 "Can't open a reference"); 213 SETERRNO(EINVAL, LIB_INVARG); 214 goto say_false; 215 } 216 #endif /* USE_STDIO */ 217 name = SvOK(*svp) ? savesvpv (*svp) : savepvs (""); 218 SAVEFREEPV(name); 219 } 220 else { 221 name = type; 222 len = tend-type; 223 } 224 IoTYPE(io) = *type; 225 if ((*type == IoTYPE_RDWR) && /* scary */ 226 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) && 227 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) { 228 TAINT_PROPER("open"); 229 mode[1] = *type++; 230 writing = 1; 231 } 232 233 if (*type == IoTYPE_PIPE) { 234 if (num_svs) { 235 if (type[1] != IoTYPE_STD) { 236 unknown_open_mode: 237 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname); 238 } 239 type++; 240 } 241 do { 242 type++; 243 } while (isSPACE(*type)); 244 if (!num_svs) { 245 name = type; 246 len = tend-type; 247 } 248 if (*name == '\0') { 249 /* command is missing 19990114 */ 250 if (ckWARN(WARN_PIPE)) 251 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open"); 252 errno = EPIPE; 253 goto say_false; 254 } 255 if (!(*name == '-' && name[1] == '\0') || num_svs) 256 TAINT_ENV(); 257 TAINT_PROPER("piped open"); 258 if (!num_svs && name[len-1] == '|') { 259 name[--len] = '\0' ; 260 if (ckWARN(WARN_PIPE)) 261 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe"); 262 } 263 mode[0] = 'w'; 264 writing = 1; 265 if (out_raw) 266 mode[1] = 'b'; 267 else if (out_crlf) 268 mode[1] = 't'; 269 if (num_svs > 1) { 270 fp = PerlProc_popen_list(mode, num_svs, svp); 271 } 272 else { 273 fp = PerlProc_popen(name,mode); 274 } 275 if (num_svs) { 276 if (*type) { 277 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { 278 goto say_false; 279 } 280 } 281 } 282 } /* IoTYPE_PIPE */ 283 else if (*type == IoTYPE_WRONLY) { 284 TAINT_PROPER("open"); 285 type++; 286 if (*type == IoTYPE_WRONLY) { 287 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */ 288 mode[0] = IoTYPE(io) = IoTYPE_APPEND; 289 type++; 290 } 291 else { 292 mode[0] = 'w'; 293 } 294 writing = 1; 295 296 if (out_raw) 297 mode[1] = 'b'; 298 else if (out_crlf) 299 mode[1] = 't'; 300 if (*type == '&') { 301 duplicity: 302 dodup = PERLIO_DUP_FD; 303 type++; 304 if (*type == '=') { 305 dodup = 0; 306 type++; 307 } 308 if (!num_svs && !*type && supplied_fp) { 309 /* "<+&" etc. is used by typemaps */ 310 fp = supplied_fp; 311 } 312 else { 313 PerlIO *that_fp = NULL; 314 if (num_svs > 1) { 315 /* diag_listed_as: More than one argument to '%s' open */ 316 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io)); 317 } 318 while (isSPACE(*type)) 319 type++; 320 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) { 321 fd = SvUV(*svp); 322 num_svs = 0; 323 } 324 else if (isDIGIT(*type)) { 325 fd = atoi(type); 326 } 327 else { 328 const IO* thatio; 329 if (num_svs) { 330 thatio = sv_2io(*svp); 331 } 332 else { 333 GV * const thatgv = gv_fetchpvn_flags(type, tend - type, 334 0, SVt_PVIO); 335 thatio = GvIO(thatgv); 336 } 337 if (!thatio) { 338 #ifdef EINVAL 339 SETERRNO(EINVAL,SS_IVCHAN); 340 #endif 341 goto say_false; 342 } 343 if ((that_fp = IoIFP(thatio))) { 344 /* Flush stdio buffer before dup. --mjd 345 * Unfortunately SEEK_CURing 0 seems to 346 * be optimized away on most platforms; 347 * only Solaris and Linux seem to flush 348 * on that. --jhi */ 349 #ifdef USE_SFIO 350 /* sfio fails to clear error on next 351 sfwrite, contrary to documentation. 352 -- Nicholas Clark */ 353 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1) 354 PerlIO_clearerr(that_fp); 355 #endif 356 /* On the other hand, do all platforms 357 * take gracefully to flushing a read-only 358 * filehandle? Perhaps we should do 359 * fsetpos(src)+fgetpos(dst)? --nik */ 360 PerlIO_flush(that_fp); 361 fd = PerlIO_fileno(that_fp); 362 /* When dup()ing STDIN, STDOUT or STDERR 363 * explicitly set appropriate access mode */ 364 if (that_fp == PerlIO_stdout() 365 || that_fp == PerlIO_stderr()) 366 IoTYPE(io) = IoTYPE_WRONLY; 367 else if (that_fp == PerlIO_stdin()) 368 IoTYPE(io) = IoTYPE_RDONLY; 369 /* When dup()ing a socket, say result is 370 * one as well */ 371 else if (IoTYPE(thatio) == IoTYPE_SOCKET) 372 IoTYPE(io) = IoTYPE_SOCKET; 373 } 374 else 375 fd = -1; 376 } 377 if (!num_svs) 378 type = NULL; 379 if (that_fp) { 380 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup); 381 } 382 else { 383 if (dodup) 384 fd = PerlLIO_dup(fd); 385 else 386 was_fdopen = TRUE; 387 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) { 388 if (dodup && fd >= 0) 389 PerlLIO_close(fd); 390 } 391 } 392 } 393 } /* & */ 394 else { 395 while (isSPACE(*type)) 396 type++; 397 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { 398 type++; 399 fp = PerlIO_stdout(); 400 IoTYPE(io) = IoTYPE_STD; 401 if (num_svs > 1) { 402 /* diag_listed_as: More than one argument to '%s' open */ 403 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD); 404 } 405 } 406 else { 407 if (!num_svs) { 408 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); 409 num_svs = 1; 410 svp = &namesv; 411 type = NULL; 412 } 413 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); 414 } 415 } /* !& */ 416 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) 417 goto unknown_open_mode; 418 } /* IoTYPE_WRONLY */ 419 else if (*type == IoTYPE_RDONLY) { 420 do { 421 type++; 422 } while (isSPACE(*type)); 423 mode[0] = 'r'; 424 if (in_raw) 425 mode[1] = 'b'; 426 else if (in_crlf) 427 mode[1] = 't'; 428 if (*type == '&') { 429 goto duplicity; 430 } 431 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { 432 type++; 433 fp = PerlIO_stdin(); 434 IoTYPE(io) = IoTYPE_STD; 435 if (num_svs > 1) { 436 /* diag_listed_as: More than one argument to '%s' open */ 437 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD); 438 } 439 } 440 else { 441 if (!num_svs) { 442 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); 443 num_svs = 1; 444 svp = &namesv; 445 type = NULL; 446 } 447 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); 448 } 449 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) 450 goto unknown_open_mode; 451 } /* IoTYPE_RDONLY */ 452 else if ((num_svs && /* '-|...' or '...|' */ 453 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) || 454 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) { 455 if (num_svs) { 456 type += 2; /* skip over '-|' */ 457 } 458 else { 459 *--tend = '\0'; 460 while (tend > type && isSPACE(tend[-1])) 461 *--tend = '\0'; 462 for (; isSPACE(*type); type++) 463 ; 464 name = type; 465 len = tend-type; 466 } 467 if (*name == '\0') { 468 /* command is missing 19990114 */ 469 if (ckWARN(WARN_PIPE)) 470 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open"); 471 errno = EPIPE; 472 goto say_false; 473 } 474 if (!(*name == '-' && name[1] == '\0') || num_svs) 475 TAINT_ENV(); 476 TAINT_PROPER("piped open"); 477 mode[0] = 'r'; 478 479 if (in_raw) 480 mode[1] = 'b'; 481 else if (in_crlf) 482 mode[1] = 't'; 483 484 if (num_svs > 1) { 485 fp = PerlProc_popen_list(mode,num_svs,svp); 486 } 487 else { 488 fp = PerlProc_popen(name,mode); 489 } 490 IoTYPE(io) = IoTYPE_PIPE; 491 if (num_svs) { 492 while (isSPACE(*type)) 493 type++; 494 if (*type) { 495 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { 496 goto say_false; 497 } 498 } 499 } 500 } 501 else { /* layer(Args) */ 502 if (num_svs) 503 goto unknown_open_mode; 504 name = type; 505 IoTYPE(io) = IoTYPE_RDONLY; 506 for (; isSPACE(*name); name++) 507 ; 508 mode[0] = 'r'; 509 510 if (in_raw) 511 mode[1] = 'b'; 512 else if (in_crlf) 513 mode[1] = 't'; 514 515 if (*name == '-' && name[1] == '\0') { 516 fp = PerlIO_stdin(); 517 IoTYPE(io) = IoTYPE_STD; 518 } 519 else { 520 if (!num_svs) { 521 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP); 522 num_svs = 1; 523 svp = &namesv; 524 type = NULL; 525 } 526 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); 527 } 528 } 529 } 530 if (!fp) { 531 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE) 532 && strchr(oname, '\n') 533 534 ) 535 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open"); 536 goto say_false; 537 } 538 539 if (ckWARN(WARN_IO)) { 540 if ((IoTYPE(io) == IoTYPE_RDONLY) && 541 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) { 542 Perl_warner(aTHX_ packWARN(WARN_IO), 543 "Filehandle STD%s reopened as %s only for input", 544 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"), 545 GvENAME(gv)); 546 } 547 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) { 548 Perl_warner(aTHX_ packWARN(WARN_IO), 549 "Filehandle STDIN reopened as %s only for output", 550 GvENAME(gv)); 551 } 552 } 553 554 fd = PerlIO_fileno(fp); 555 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a 556 * socket - this covers PerlIO::scalar - otherwise unless we "know" the 557 * type probe for socket-ness. 558 */ 559 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) { 560 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) { 561 /* If PerlIO claims to have fd we had better be able to fstat() it. */ 562 (void) PerlIO_close(fp); 563 goto say_false; 564 } 565 #ifndef PERL_MICRO 566 if (S_ISSOCK(PL_statbuf.st_mode)) 567 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */ 568 #ifdef HAS_SOCKET 569 else if ( 570 #ifdef S_IFMT 571 !(PL_statbuf.st_mode & S_IFMT) 572 #else 573 !PL_statbuf.st_mode 574 #endif 575 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */ 576 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */ 577 ) { /* on OS's that return 0 on fstat()ed pipe */ 578 char tmpbuf[256]; 579 Sock_size_t buflen = sizeof tmpbuf; 580 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0 581 || errno != ENOTSOCK) 582 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */ 583 /* but some return 0 for streams too, sigh */ 584 } 585 #endif /* HAS_SOCKET */ 586 #endif /* !PERL_MICRO */ 587 } 588 589 /* Eeek - FIXME !!! 590 * If this is a standard handle we discard all the layer stuff 591 * and just dup the fd into whatever was on the handle before ! 592 */ 593 594 if (saveifp) { /* must use old fp? */ 595 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR 596 then dup the new fileno down 597 */ 598 if (saveofp) { 599 PerlIO_flush(saveofp); /* emulate PerlIO_close() */ 600 if (saveofp != saveifp) { /* was a socket? */ 601 PerlIO_close(saveofp); 602 } 603 } 604 if (savefd != fd) { 605 /* Still a small can-of-worms here if (say) PerlIO::scalar 606 is assigned to (say) STDOUT - for now let dup2() fail 607 and provide the error 608 */ 609 if (PerlLIO_dup2(fd, savefd) < 0) { 610 (void)PerlIO_close(fp); 611 goto say_false; 612 } 613 #ifdef VMS 614 if (savefd != PerlIO_fileno(PerlIO_stdin())) { 615 char newname[FILENAME_MAX+1]; 616 if (PerlIO_getname(fp, newname)) { 617 if (fd == PerlIO_fileno(PerlIO_stdout())) 618 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname); 619 if (fd == PerlIO_fileno(PerlIO_stderr())) 620 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname); 621 } 622 } 623 #endif 624 625 #if !defined(WIN32) 626 /* PL_fdpid isn't used on Windows, so avoid this useless work. 627 * XXX Probably the same for a lot of other places. */ 628 { 629 Pid_t pid; 630 SV *sv; 631 632 sv = *av_fetch(PL_fdpid,fd,TRUE); 633 SvUPGRADE(sv, SVt_IV); 634 pid = SvIVX(sv); 635 SvIV_set(sv, 0); 636 sv = *av_fetch(PL_fdpid,savefd,TRUE); 637 SvUPGRADE(sv, SVt_IV); 638 SvIV_set(sv, pid); 639 } 640 #endif 641 642 if (was_fdopen) { 643 /* need to close fp without closing underlying fd */ 644 int ofd = PerlIO_fileno(fp); 645 int dupfd = PerlLIO_dup(ofd); 646 #if defined(HAS_FCNTL) && defined(F_SETFD) 647 /* Assume if we have F_SETFD we have F_GETFD */ 648 int coe = fcntl(ofd,F_GETFD); 649 #endif 650 PerlIO_close(fp); 651 PerlLIO_dup2(dupfd,ofd); 652 #if defined(HAS_FCNTL) && defined(F_SETFD) 653 /* The dup trick has lost close-on-exec on ofd */ 654 fcntl(ofd,F_SETFD, coe); 655 #endif 656 PerlLIO_close(dupfd); 657 } 658 else 659 PerlIO_close(fp); 660 } 661 fp = saveifp; 662 PerlIO_clearerr(fp); 663 fd = PerlIO_fileno(fp); 664 } 665 #if defined(HAS_FCNTL) && defined(F_SETFD) 666 if (fd >= 0) { 667 dSAVE_ERRNO; 668 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */ 669 RESTORE_ERRNO; 670 } 671 #endif 672 IoIFP(io) = fp; 673 674 IoFLAGS(io) &= ~IOf_NOLINE; 675 if (writing) { 676 if (IoTYPE(io) == IoTYPE_SOCKET 677 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) { 678 char *s = mode; 679 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC) 680 s++; 681 *s = 'w'; 682 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) { 683 PerlIO_close(fp); 684 IoIFP(io) = NULL; 685 goto say_false; 686 } 687 } 688 else 689 IoOFP(io) = fp; 690 } 691 return TRUE; 692 693 say_false: 694 IoIFP(io) = saveifp; 695 IoOFP(io) = saveofp; 696 IoTYPE(io) = savetype; 697 return FALSE; 698 } 699 700 PerlIO * 701 Perl_nextargv(pTHX_ register GV *gv) 702 { 703 dVAR; 704 register SV *sv; 705 #ifndef FLEXFILENAMES 706 int filedev; 707 int fileino; 708 #endif 709 Uid_t fileuid; 710 Gid_t filegid; 711 IO * const io = GvIOp(gv); 712 713 PERL_ARGS_ASSERT_NEXTARGV; 714 715 if (!PL_argvoutgv) 716 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 717 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) { 718 IoFLAGS(io) &= ~IOf_START; 719 if (PL_inplace) { 720 assert(PL_defoutgv); 721 Perl_av_create_and_push(aTHX_ &PL_argvout_stack, 722 SvREFCNT_inc_simple_NN(PL_defoutgv)); 723 } 724 } 725 if (PL_filemode & (S_ISUID|S_ISGID)) { 726 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */ 727 #ifdef HAS_FCHMOD 728 if (PL_lastfd != -1) 729 (void)fchmod(PL_lastfd,PL_filemode); 730 #else 731 (void)PerlLIO_chmod(PL_oldname,PL_filemode); 732 #endif 733 } 734 PL_lastfd = -1; 735 PL_filemode = 0; 736 if (!GvAV(gv)) 737 return NULL; 738 while (av_len(GvAV(gv)) >= 0) { 739 STRLEN oldlen; 740 sv = av_shift(GvAV(gv)); 741 SAVEFREESV(sv); 742 sv_setsv(GvSVn(gv),sv); 743 SvSETMAGIC(GvSV(gv)); 744 PL_oldname = SvPVx(GvSV(gv), oldlen); 745 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) { 746 if (PL_inplace) { 747 TAINT_PROPER("inplace open"); 748 if (oldlen == 1 && *PL_oldname == '-') { 749 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, 750 SVt_PVIO)); 751 return IoIFP(GvIOp(gv)); 752 } 753 #ifndef FLEXFILENAMES 754 filedev = PL_statbuf.st_dev; 755 fileino = PL_statbuf.st_ino; 756 #endif 757 PL_filemode = PL_statbuf.st_mode; 758 fileuid = PL_statbuf.st_uid; 759 filegid = PL_statbuf.st_gid; 760 if (!S_ISREG(PL_filemode)) { 761 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), 762 "Can't do inplace edit: %s is not a regular file", 763 PL_oldname ); 764 do_close(gv,FALSE); 765 continue; 766 } 767 if (*PL_inplace && strNE(PL_inplace, "*")) { 768 const char *star = strchr(PL_inplace, '*'); 769 if (star) { 770 const char *begin = PL_inplace; 771 sv_setpvs(sv, ""); 772 do { 773 sv_catpvn(sv, begin, star - begin); 774 sv_catpvn(sv, PL_oldname, oldlen); 775 begin = ++star; 776 } while ((star = strchr(begin, '*'))); 777 if (*begin) 778 sv_catpv(sv,begin); 779 } 780 else { 781 sv_catpv(sv,PL_inplace); 782 } 783 #ifndef FLEXFILENAMES 784 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0 785 && PL_statbuf.st_dev == filedev 786 && PL_statbuf.st_ino == fileino) 787 #ifdef DJGPP 788 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0) 789 #endif 790 ) 791 { 792 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), 793 "Can't do inplace edit: %"SVf" would not be unique", 794 SVfARG(sv)); 795 do_close(gv,FALSE); 796 continue; 797 } 798 #endif 799 #ifdef HAS_RENAME 800 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC) 801 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) { 802 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), 803 "Can't rename %s to %"SVf": %s, skipping file", 804 PL_oldname, SVfARG(sv), Strerror(errno)); 805 do_close(gv,FALSE); 806 continue; 807 } 808 #else 809 do_close(gv,FALSE); 810 (void)PerlLIO_unlink(SvPVX_const(sv)); 811 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv)); 812 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),TRUE,O_RDONLY,0,NULL); 813 #endif /* DOSISH */ 814 #else 815 (void)UNLINK(SvPVX_const(sv)); 816 if (link(PL_oldname,SvPVX_const(sv)) < 0) { 817 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), 818 "Can't rename %s to %"SVf": %s, skipping file", 819 PL_oldname, SVfARG(sv), Strerror(errno) ); 820 do_close(gv,FALSE); 821 continue; 822 } 823 (void)UNLINK(PL_oldname); 824 #endif 825 } 826 else { 827 #if !defined(DOSISH) && !defined(AMIGAOS) 828 # ifndef VMS /* Don't delete; use automatic file versioning */ 829 if (UNLINK(PL_oldname) < 0) { 830 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), 831 "Can't remove %s: %s, skipping file", 832 PL_oldname, Strerror(errno) ); 833 do_close(gv,FALSE); 834 continue; 835 } 836 # endif 837 #else 838 Perl_croak(aTHX_ "Can't do inplace edit without backup"); 839 #endif 840 } 841 842 sv_setpvn(sv,PL_oldname,oldlen); 843 SETERRNO(0,0); /* in case sprintf set errno */ 844 if (!Perl_do_openn(aTHX_ PL_argvoutgv, (char*)SvPVX_const(sv), 845 SvCUR(sv), TRUE, 846 #ifdef VMS 847 O_WRONLY|O_CREAT|O_TRUNC,0, 848 #else 849 O_WRONLY|O_CREAT|OPEN_EXCL,0600, 850 #endif 851 NULL, NULL, 0)) { 852 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s", 853 PL_oldname, Strerror(errno) ); 854 do_close(gv,FALSE); 855 continue; 856 } 857 setdefout(PL_argvoutgv); 858 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv))); 859 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf); 860 #ifdef HAS_FCHMOD 861 (void)fchmod(PL_lastfd,PL_filemode); 862 #else 863 # if !(defined(WIN32) && defined(__BORLANDC__)) 864 /* Borland runtime creates a readonly file! */ 865 (void)PerlLIO_chmod(PL_oldname,PL_filemode); 866 # endif 867 #endif 868 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) { 869 #ifdef HAS_FCHOWN 870 (void)fchown(PL_lastfd,fileuid,filegid); 871 #else 872 #ifdef HAS_CHOWN 873 (void)PerlLIO_chown(PL_oldname,fileuid,filegid); 874 #endif 875 #endif 876 } 877 } 878 return IoIFP(GvIOp(gv)); 879 } 880 else { 881 if (ckWARN_d(WARN_INPLACE)) { 882 const int eno = errno; 883 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0 884 && !S_ISREG(PL_statbuf.st_mode)) 885 { 886 Perl_warner(aTHX_ packWARN(WARN_INPLACE), 887 "Can't do inplace edit: %s is not a regular file", 888 PL_oldname); 889 } 890 else 891 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s", 892 PL_oldname, Strerror(eno)); 893 } 894 } 895 } 896 if (io && (IoFLAGS(io) & IOf_ARGV)) 897 IoFLAGS(io) |= IOf_START; 898 if (PL_inplace) { 899 (void)do_close(PL_argvoutgv,FALSE); 900 if (io && (IoFLAGS(io) & IOf_ARGV) 901 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0) 902 { 903 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack)); 904 setdefout(oldout); 905 SvREFCNT_dec(oldout); 906 return NULL; 907 } 908 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO)); 909 } 910 return NULL; 911 } 912 913 /* explicit renamed to avoid C++ conflict -- kja */ 914 bool 915 Perl_do_close(pTHX_ GV *gv, bool not_implicit) 916 { 917 dVAR; 918 bool retval; 919 IO *io; 920 921 if (!gv) 922 gv = PL_argvgv; 923 if (!gv || !isGV_with_GP(gv)) { 924 if (not_implicit) 925 SETERRNO(EBADF,SS_IVCHAN); 926 return FALSE; 927 } 928 io = GvIO(gv); 929 if (!io) { /* never opened */ 930 if (not_implicit) { 931 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */ 932 report_evil_fh(gv, io, PL_op->op_type); 933 SETERRNO(EBADF,SS_IVCHAN); 934 } 935 return FALSE; 936 } 937 retval = io_close(io, not_implicit); 938 if (not_implicit) { 939 IoLINES(io) = 0; 940 IoPAGE(io) = 0; 941 IoLINES_LEFT(io) = IoPAGE_LEN(io); 942 } 943 IoTYPE(io) = IoTYPE_CLOSED; 944 return retval; 945 } 946 947 bool 948 Perl_io_close(pTHX_ IO *io, bool not_implicit) 949 { 950 dVAR; 951 bool retval = FALSE; 952 953 PERL_ARGS_ASSERT_IO_CLOSE; 954 955 if (IoIFP(io)) { 956 if (IoTYPE(io) == IoTYPE_PIPE) { 957 const int status = PerlProc_pclose(IoIFP(io)); 958 if (not_implicit) { 959 STATUS_NATIVE_CHILD_SET(status); 960 retval = (STATUS_UNIX == 0); 961 } 962 else { 963 retval = (status != -1); 964 } 965 } 966 else if (IoTYPE(io) == IoTYPE_STD) 967 retval = TRUE; 968 else { 969 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */ 970 const bool prev_err = PerlIO_error(IoOFP(io)); 971 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err); 972 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ 973 } 974 else { 975 const bool prev_err = PerlIO_error(IoIFP(io)); 976 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err); 977 } 978 } 979 IoOFP(io) = IoIFP(io) = NULL; 980 } 981 else if (not_implicit) { 982 SETERRNO(EBADF,SS_IVCHAN); 983 } 984 985 return retval; 986 } 987 988 bool 989 Perl_do_eof(pTHX_ GV *gv) 990 { 991 dVAR; 992 register IO * const io = GvIO(gv); 993 994 PERL_ARGS_ASSERT_DO_EOF; 995 996 if (!io) 997 return TRUE; 998 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO)) 999 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY); 1000 1001 while (IoIFP(io)) { 1002 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */ 1003 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */ 1004 return FALSE; /* this is the most usual case */ 1005 } 1006 1007 { 1008 /* getc and ungetc can stomp on errno */ 1009 dSAVE_ERRNO; 1010 const int ch = PerlIO_getc(IoIFP(io)); 1011 if (ch != EOF) { 1012 (void)PerlIO_ungetc(IoIFP(io),ch); 1013 RESTORE_ERRNO; 1014 return FALSE; 1015 } 1016 RESTORE_ERRNO; 1017 } 1018 1019 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) { 1020 if (PerlIO_get_cnt(IoIFP(io)) < -1) 1021 PerlIO_set_cnt(IoIFP(io),-1); 1022 } 1023 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */ 1024 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */ 1025 return TRUE; 1026 } 1027 else 1028 return TRUE; /* normal fp, definitely end of file */ 1029 } 1030 return TRUE; 1031 } 1032 1033 Off_t 1034 Perl_do_tell(pTHX_ GV *gv) 1035 { 1036 dVAR; 1037 register IO *io = NULL; 1038 register PerlIO *fp; 1039 1040 PERL_ARGS_ASSERT_DO_TELL; 1041 1042 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) { 1043 #ifdef ULTRIX_STDIO_BOTCH 1044 if (PerlIO_eof(fp)) 1045 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */ 1046 #endif 1047 return PerlIO_tell(fp); 1048 } 1049 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) 1050 report_evil_fh(gv, io, PL_op->op_type); 1051 SETERRNO(EBADF,RMS_IFI); 1052 return (Off_t)-1; 1053 } 1054 1055 bool 1056 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence) 1057 { 1058 dVAR; 1059 register IO *io = NULL; 1060 register PerlIO *fp; 1061 1062 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) { 1063 #ifdef ULTRIX_STDIO_BOTCH 1064 if (PerlIO_eof(fp)) 1065 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */ 1066 #endif 1067 return PerlIO_seek(fp, pos, whence) >= 0; 1068 } 1069 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) 1070 report_evil_fh(gv, io, PL_op->op_type); 1071 SETERRNO(EBADF,RMS_IFI); 1072 return FALSE; 1073 } 1074 1075 Off_t 1076 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence) 1077 { 1078 dVAR; 1079 register IO *io = NULL; 1080 register PerlIO *fp; 1081 1082 PERL_ARGS_ASSERT_DO_SYSSEEK; 1083 1084 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) 1085 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence); 1086 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) 1087 report_evil_fh(gv, io, PL_op->op_type); 1088 SETERRNO(EBADF,RMS_IFI); 1089 return (Off_t)-1; 1090 } 1091 1092 int 1093 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len) 1094 { 1095 int mode = O_BINARY; 1096 if (s) { 1097 while (*s) { 1098 if (*s == ':') { 1099 switch (s[1]) { 1100 case 'r': 1101 if (s[2] == 'a' && s[3] == 'w' 1102 && (!s[4] || s[4] == ':' || isSPACE(s[4]))) 1103 { 1104 mode = O_BINARY; 1105 s += 4; 1106 len -= 4; 1107 break; 1108 } 1109 /* FALL THROUGH */ 1110 case 'c': 1111 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f' 1112 && (!s[5] || s[5] == ':' || isSPACE(s[5]))) 1113 { 1114 mode = O_TEXT; 1115 s += 5; 1116 len -= 5; 1117 break; 1118 } 1119 /* FALL THROUGH */ 1120 default: 1121 goto fail_discipline; 1122 } 1123 } 1124 else if (isSPACE(*s)) { 1125 ++s; 1126 --len; 1127 } 1128 else { 1129 const char *end; 1130 fail_discipline: 1131 end = strchr(s+1, ':'); 1132 if (!end) 1133 end = s+len; 1134 #ifndef PERLIO_LAYERS 1135 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s); 1136 #else 1137 len -= end-s; 1138 s = end; 1139 #endif 1140 } 1141 } 1142 } 1143 return mode; 1144 } 1145 1146 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) 1147 I32 1148 my_chsize(int fd, Off_t length) 1149 { 1150 #ifdef F_FREESP 1151 /* code courtesy of William Kucharski */ 1152 #define HAS_CHSIZE 1153 1154 Stat_t filebuf; 1155 1156 if (PerlLIO_fstat(fd, &filebuf) < 0) 1157 return -1; 1158 1159 if (filebuf.st_size < length) { 1160 1161 /* extend file length */ 1162 1163 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0) 1164 return -1; 1165 1166 /* write a "0" byte */ 1167 1168 if ((PerlLIO_write(fd, "", 1)) != 1) 1169 return -1; 1170 } 1171 else { 1172 /* truncate length */ 1173 struct flock fl; 1174 fl.l_whence = 0; 1175 fl.l_len = 0; 1176 fl.l_start = length; 1177 fl.l_type = F_WRLCK; /* write lock on file space */ 1178 1179 /* 1180 * This relies on the UNDOCUMENTED F_FREESP argument to 1181 * fcntl(2), which truncates the file so that it ends at the 1182 * position indicated by fl.l_start. 1183 * 1184 * Will minor miracles never cease? 1185 */ 1186 1187 if (fcntl(fd, F_FREESP, &fl) < 0) 1188 return -1; 1189 1190 } 1191 return 0; 1192 #else 1193 Perl_croak_nocontext("truncate not implemented"); 1194 #endif /* F_FREESP */ 1195 return -1; 1196 } 1197 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */ 1198 1199 bool 1200 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) 1201 { 1202 dVAR; 1203 1204 PERL_ARGS_ASSERT_DO_PRINT; 1205 1206 /* assuming fp is checked earlier */ 1207 if (!sv) 1208 return TRUE; 1209 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) { 1210 assert(!SvGMAGICAL(sv)); 1211 if (SvIsUV(sv)) 1212 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv)); 1213 else 1214 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv)); 1215 return !PerlIO_error(fp); 1216 } 1217 else { 1218 STRLEN len; 1219 /* Do this first to trigger any overloading. */ 1220 const char *tmps = SvPV_const(sv, len); 1221 U8 *tmpbuf = NULL; 1222 bool happy = TRUE; 1223 1224 if (PerlIO_isutf8(fp)) { 1225 if (!SvUTF8(sv)) { 1226 /* We don't modify the original scalar. */ 1227 tmpbuf = bytes_to_utf8((const U8*) tmps, &len); 1228 tmps = (char *) tmpbuf; 1229 } 1230 } 1231 else if (DO_UTF8(sv)) { 1232 STRLEN tmplen = len; 1233 bool utf8 = TRUE; 1234 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8); 1235 if (!utf8) { 1236 tmpbuf = result; 1237 tmps = (char *) tmpbuf; 1238 len = tmplen; 1239 } 1240 else { 1241 assert((char *)result == tmps); 1242 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), 1243 "Wide character in print"); 1244 } 1245 } 1246 /* To detect whether the process is about to overstep its 1247 * filesize limit we would need getrlimit(). We could then 1248 * also transparently raise the limit with setrlimit() -- 1249 * but only until the system hard limit/the filesystem limit, 1250 * at which we would get EPERM. Note that when using buffered 1251 * io the write failure can be delayed until the flush/close. --jhi */ 1252 if (len && (PerlIO_write(fp,tmps,len) == 0)) 1253 happy = FALSE; 1254 Safefree(tmpbuf); 1255 return happy ? !PerlIO_error(fp) : FALSE; 1256 } 1257 } 1258 1259 I32 1260 Perl_my_stat(pTHX) 1261 { 1262 dVAR; 1263 dSP; 1264 IO *io; 1265 GV* gv; 1266 1267 if (PL_op->op_flags & OPf_REF) { 1268 EXTEND(SP,1); 1269 gv = cGVOP_gv; 1270 do_fstat: 1271 if (gv == PL_defgv) 1272 return PL_laststatval; 1273 io = GvIO(gv); 1274 do_fstat_have_io: 1275 PL_laststype = OP_STAT; 1276 PL_statgv = gv; 1277 sv_setpvs(PL_statname, ""); 1278 if(io) { 1279 if (IoIFP(io)) { 1280 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache)); 1281 } else if (IoDIRP(io)) { 1282 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache)); 1283 } else { 1284 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) 1285 report_evil_fh(gv, io, PL_op->op_type); 1286 return (PL_laststatval = -1); 1287 } 1288 } else { 1289 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) 1290 report_evil_fh(gv, io, PL_op->op_type); 1291 return (PL_laststatval = -1); 1292 } 1293 } 1294 else if (PL_op->op_private & OPpFT_STACKED) { 1295 return PL_laststatval; 1296 } 1297 else { 1298 SV* const sv = POPs; 1299 const char *s; 1300 STRLEN len; 1301 PUTBACK; 1302 if (isGV_with_GP(sv)) { 1303 gv = MUTABLE_GV(sv); 1304 goto do_fstat; 1305 } 1306 else if (SvROK(sv) && isGV_with_GP(SvRV(sv))) { 1307 gv = MUTABLE_GV(SvRV(sv)); 1308 goto do_fstat; 1309 } 1310 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) { 1311 io = MUTABLE_IO(SvRV(sv)); 1312 gv = NULL; 1313 goto do_fstat_have_io; 1314 } 1315 1316 s = SvPV_const(sv, len); 1317 PL_statgv = NULL; 1318 sv_setpvn(PL_statname, s, len); 1319 s = SvPVX_const(PL_statname); /* s now NUL-terminated */ 1320 PL_laststype = OP_STAT; 1321 PL_laststatval = PerlLIO_stat(s, &PL_statcache); 1322 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n')) 1323 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat"); 1324 return PL_laststatval; 1325 } 1326 } 1327 1328 1329 I32 1330 Perl_my_lstat(pTHX) 1331 { 1332 dVAR; 1333 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat"; 1334 dSP; 1335 SV *sv; 1336 const char *file; 1337 if (PL_op->op_flags & OPf_REF) { 1338 EXTEND(SP,1); 1339 if (cGVOP_gv == PL_defgv) { 1340 if (PL_laststype != OP_LSTAT) 1341 Perl_croak(aTHX_ no_prev_lstat); 1342 return PL_laststatval; 1343 } 1344 if (ckWARN(WARN_IO)) { 1345 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s", 1346 GvENAME(cGVOP_gv)); 1347 return (PL_laststatval = -1); 1348 } 1349 } 1350 else if (PL_laststype != OP_LSTAT 1351 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO)) 1352 Perl_croak(aTHX_ no_prev_lstat); 1353 1354 PL_laststype = OP_LSTAT; 1355 PL_statgv = NULL; 1356 sv = POPs; 1357 PUTBACK; 1358 if (SvROK(sv) && isGV_with_GP(SvRV(sv)) && ckWARN(WARN_IO)) { 1359 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s", 1360 GvENAME((const GV *)SvRV(sv))); 1361 return (PL_laststatval = -1); 1362 } 1363 file = SvPV_nolen_const(sv); 1364 sv_setpv(PL_statname,file); 1365 PL_laststatval = PerlLIO_lstat(file,&PL_statcache); 1366 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n')) 1367 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat"); 1368 return PL_laststatval; 1369 } 1370 1371 static void 1372 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report) 1373 { 1374 const int e = errno; 1375 PERL_ARGS_ASSERT_EXEC_FAILED; 1376 if (ckWARN(WARN_EXEC)) 1377 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", 1378 cmd, Strerror(e)); 1379 if (do_report) { 1380 PerlLIO_write(fd, (void*)&e, sizeof(int)); 1381 PerlLIO_close(fd); 1382 } 1383 } 1384 1385 bool 1386 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp, 1387 int fd, int do_report) 1388 { 1389 dVAR; 1390 PERL_ARGS_ASSERT_DO_AEXEC5; 1391 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__) 1392 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system"); 1393 #else 1394 if (sp > mark) { 1395 const char **a; 1396 const char *tmps = NULL; 1397 Newx(PL_Argv, sp - mark + 1, const char*); 1398 a = PL_Argv; 1399 1400 while (++mark <= sp) { 1401 if (*mark) 1402 *a++ = SvPV_nolen_const(*mark); 1403 else 1404 *a++ = ""; 1405 } 1406 *a = NULL; 1407 if (really) 1408 tmps = SvPV_nolen_const(really); 1409 if ((!really && *PL_Argv[0] != '/') || 1410 (really && *tmps != '/')) /* will execvp use PATH? */ 1411 TAINT_ENV(); /* testing IFS here is overkill, probably */ 1412 PERL_FPU_PRE_EXEC 1413 if (really && *tmps) 1414 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv)); 1415 else 1416 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); 1417 PERL_FPU_POST_EXEC 1418 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report); 1419 } 1420 do_execfree(); 1421 #endif 1422 return FALSE; 1423 } 1424 1425 void 1426 Perl_do_execfree(pTHX) 1427 { 1428 dVAR; 1429 Safefree(PL_Argv); 1430 PL_Argv = NULL; 1431 Safefree(PL_Cmd); 1432 PL_Cmd = NULL; 1433 } 1434 1435 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION 1436 1437 bool 1438 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) 1439 { 1440 dVAR; 1441 register const char **a; 1442 register char *s; 1443 char *buf; 1444 char *cmd; 1445 /* Make a copy so we can change it */ 1446 const Size_t cmdlen = strlen(incmd) + 1; 1447 1448 PERL_ARGS_ASSERT_DO_EXEC3; 1449 1450 Newx(buf, cmdlen, char); 1451 cmd = buf; 1452 memcpy(cmd, incmd, cmdlen); 1453 1454 while (*cmd && isSPACE(*cmd)) 1455 cmd++; 1456 1457 /* save an extra exec if possible */ 1458 1459 #ifdef CSH 1460 { 1461 char flags[PERL_FLAGS_MAX]; 1462 if (strnEQ(cmd,PL_cshname,PL_cshlen) && 1463 strnEQ(cmd+PL_cshlen," -c",3)) { 1464 my_strlcpy(flags, "-c", PERL_FLAGS_MAX); 1465 s = cmd+PL_cshlen+3; 1466 if (*s == 'f') { 1467 s++; 1468 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2); 1469 } 1470 if (*s == ' ') 1471 s++; 1472 if (*s++ == '\'') { 1473 char * const ncmd = s; 1474 1475 while (*s) 1476 s++; 1477 if (s[-1] == '\n') 1478 *--s = '\0'; 1479 if (s[-1] == '\'') { 1480 *--s = '\0'; 1481 PERL_FPU_PRE_EXEC 1482 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL); 1483 PERL_FPU_POST_EXEC 1484 *s = '\''; 1485 S_exec_failed(aTHX_ PL_cshname, fd, do_report); 1486 Safefree(buf); 1487 return FALSE; 1488 } 1489 } 1490 } 1491 } 1492 #endif /* CSH */ 1493 1494 /* see if there are shell metacharacters in it */ 1495 1496 if (*cmd == '.' && isSPACE(cmd[1])) 1497 goto doshell; 1498 1499 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4])) 1500 goto doshell; 1501 1502 s = cmd; 1503 while (isALNUM(*s)) 1504 s++; /* catch VAR=val gizmo */ 1505 if (*s == '=') 1506 goto doshell; 1507 1508 for (s = cmd; *s; s++) { 1509 if (*s != ' ' && !isALPHA(*s) && 1510 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) { 1511 if (*s == '\n' && !s[1]) { 1512 *s = '\0'; 1513 break; 1514 } 1515 /* handle the 2>&1 construct at the end */ 1516 if (*s == '>' && s[1] == '&' && s[2] == '1' 1517 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2]) 1518 && (!s[3] || isSPACE(s[3]))) 1519 { 1520 const char *t = s + 3; 1521 1522 while (*t && isSPACE(*t)) 1523 ++t; 1524 if (!*t && (PerlLIO_dup2(1,2) != -1)) { 1525 s[-2] = '\0'; 1526 break; 1527 } 1528 } 1529 doshell: 1530 PERL_FPU_PRE_EXEC 1531 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL); 1532 PERL_FPU_POST_EXEC 1533 S_exec_failed(aTHX_ PL_sh_path, fd, do_report); 1534 Safefree(buf); 1535 return FALSE; 1536 } 1537 } 1538 1539 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*); 1540 PL_Cmd = savepvn(cmd, s-cmd); 1541 a = PL_Argv; 1542 for (s = PL_Cmd; *s;) { 1543 while (isSPACE(*s)) 1544 s++; 1545 if (*s) 1546 *(a++) = s; 1547 while (*s && !isSPACE(*s)) 1548 s++; 1549 if (*s) 1550 *s++ = '\0'; 1551 } 1552 *a = NULL; 1553 if (PL_Argv[0]) { 1554 PERL_FPU_PRE_EXEC 1555 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); 1556 PERL_FPU_POST_EXEC 1557 if (errno == ENOEXEC) { /* for system V NIH syndrome */ 1558 do_execfree(); 1559 goto doshell; 1560 } 1561 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report); 1562 } 1563 do_execfree(); 1564 Safefree(buf); 1565 return FALSE; 1566 } 1567 1568 #endif /* OS2 || WIN32 */ 1569 1570 I32 1571 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp) 1572 { 1573 dVAR; 1574 register I32 val; 1575 register I32 tot = 0; 1576 const char *const what = PL_op_name[type]; 1577 const char *s; 1578 SV ** const oldmark = mark; 1579 1580 PERL_ARGS_ASSERT_APPLY; 1581 1582 /* Doing this ahead of the switch statement preserves the old behaviour, 1583 where attempting to use kill as a taint test test would fail on 1584 platforms where kill was not defined. */ 1585 #ifndef HAS_KILL 1586 if (type == OP_KILL) 1587 Perl_die(aTHX_ PL_no_func, what); 1588 #endif 1589 #ifndef HAS_CHOWN 1590 if (type == OP_CHOWN) 1591 Perl_die(aTHX_ PL_no_func, what); 1592 #endif 1593 1594 1595 #define APPLY_TAINT_PROPER() \ 1596 STMT_START { \ 1597 if (PL_tainted) { TAINT_PROPER(what); } \ 1598 } STMT_END 1599 1600 /* This is a first heuristic; it doesn't catch tainting magic. */ 1601 if (PL_tainting) { 1602 while (++mark <= sp) { 1603 if (SvTAINTED(*mark)) { 1604 TAINT; 1605 break; 1606 } 1607 } 1608 mark = oldmark; 1609 } 1610 switch (type) { 1611 case OP_CHMOD: 1612 APPLY_TAINT_PROPER(); 1613 if (++mark <= sp) { 1614 val = SvIV(*mark); 1615 APPLY_TAINT_PROPER(); 1616 tot = sp - mark; 1617 while (++mark <= sp) { 1618 GV* gv; 1619 if (isGV_with_GP(*mark)) { 1620 gv = MUTABLE_GV(*mark); 1621 do_fchmod: 1622 if (GvIO(gv) && IoIFP(GvIOp(gv))) { 1623 #ifdef HAS_FCHMOD 1624 APPLY_TAINT_PROPER(); 1625 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val)) 1626 tot--; 1627 #else 1628 Perl_die(aTHX_ PL_no_func, "fchmod"); 1629 #endif 1630 } 1631 else { 1632 tot--; 1633 } 1634 } 1635 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) { 1636 gv = MUTABLE_GV(SvRV(*mark)); 1637 goto do_fchmod; 1638 } 1639 else { 1640 const char *name = SvPV_nolen_const(*mark); 1641 APPLY_TAINT_PROPER(); 1642 if (PerlLIO_chmod(name, val)) 1643 tot--; 1644 } 1645 } 1646 } 1647 break; 1648 #ifdef HAS_CHOWN 1649 case OP_CHOWN: 1650 APPLY_TAINT_PROPER(); 1651 if (sp - mark > 2) { 1652 register I32 val2; 1653 val = SvIVx(*++mark); 1654 val2 = SvIVx(*++mark); 1655 APPLY_TAINT_PROPER(); 1656 tot = sp - mark; 1657 while (++mark <= sp) { 1658 GV* gv; 1659 if (isGV_with_GP(*mark)) { 1660 gv = MUTABLE_GV(*mark); 1661 do_fchown: 1662 if (GvIO(gv) && IoIFP(GvIOp(gv))) { 1663 #ifdef HAS_FCHOWN 1664 APPLY_TAINT_PROPER(); 1665 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2)) 1666 tot--; 1667 #else 1668 Perl_die(aTHX_ PL_no_func, "fchown"); 1669 #endif 1670 } 1671 else { 1672 tot--; 1673 } 1674 } 1675 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) { 1676 gv = MUTABLE_GV(SvRV(*mark)); 1677 goto do_fchown; 1678 } 1679 else { 1680 const char *name = SvPV_nolen_const(*mark); 1681 APPLY_TAINT_PROPER(); 1682 if (PerlLIO_chown(name, val, val2)) 1683 tot--; 1684 } 1685 } 1686 } 1687 break; 1688 #endif 1689 /* 1690 XXX Should we make lchown() directly available from perl? 1691 For now, we'll let Configure test for HAS_LCHOWN, but do 1692 nothing in the core. 1693 --AD 5/1998 1694 */ 1695 #ifdef HAS_KILL 1696 case OP_KILL: 1697 APPLY_TAINT_PROPER(); 1698 if (mark == sp) 1699 break; 1700 s = SvPVx_nolen_const(*++mark); 1701 if (isALPHA(*s)) { 1702 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') 1703 s += 3; 1704 if ((val = whichsig(s)) < 0) 1705 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s); 1706 } 1707 else 1708 val = SvIV(*mark); 1709 APPLY_TAINT_PROPER(); 1710 tot = sp - mark; 1711 #ifdef VMS 1712 /* kill() doesn't do process groups (job trees?) under VMS */ 1713 if (val < 0) val = -val; 1714 if (val == SIGKILL) { 1715 # include <starlet.h> 1716 /* Use native sys$delprc() to insure that target process is 1717 * deleted; supervisor-mode images don't pay attention to 1718 * CRTL's emulation of Unix-style signals and kill() 1719 */ 1720 while (++mark <= sp) { 1721 I32 proc; 1722 register unsigned long int __vmssts; 1723 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark))) 1724 Perl_croak(aTHX_ "Can't kill a non-numeric process ID"); 1725 proc = SvIV(*mark); 1726 APPLY_TAINT_PROPER(); 1727 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) { 1728 tot--; 1729 switch (__vmssts) { 1730 case SS$_NONEXPR: 1731 case SS$_NOSUCHNODE: 1732 SETERRNO(ESRCH,__vmssts); 1733 break; 1734 case SS$_NOPRIV: 1735 SETERRNO(EPERM,__vmssts); 1736 break; 1737 default: 1738 SETERRNO(EVMSERR,__vmssts); 1739 } 1740 } 1741 } 1742 break; 1743 } 1744 #endif 1745 if (val < 0) { 1746 val = -val; 1747 while (++mark <= sp) { 1748 I32 proc; 1749 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark))) 1750 Perl_croak(aTHX_ "Can't kill a non-numeric process ID"); 1751 proc = SvIV(*mark); 1752 APPLY_TAINT_PROPER(); 1753 #ifdef HAS_KILLPG 1754 if (PerlProc_killpg(proc,val)) /* BSD */ 1755 #else 1756 if (PerlProc_kill(-proc,val)) /* SYSV */ 1757 #endif 1758 tot--; 1759 } 1760 } 1761 else { 1762 while (++mark <= sp) { 1763 I32 proc; 1764 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark))) 1765 Perl_croak(aTHX_ "Can't kill a non-numeric process ID"); 1766 proc = SvIV(*mark); 1767 APPLY_TAINT_PROPER(); 1768 if (PerlProc_kill(proc, val)) 1769 tot--; 1770 } 1771 } 1772 break; 1773 #endif 1774 case OP_UNLINK: 1775 APPLY_TAINT_PROPER(); 1776 tot = sp - mark; 1777 while (++mark <= sp) { 1778 s = SvPV_nolen_const(*mark); 1779 APPLY_TAINT_PROPER(); 1780 if (PL_euid || PL_unsafe) { 1781 if (UNLINK(s)) 1782 tot--; 1783 } 1784 else { /* don't let root wipe out directories without -U */ 1785 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode)) 1786 tot--; 1787 else { 1788 if (UNLINK(s)) 1789 tot--; 1790 } 1791 } 1792 } 1793 break; 1794 #if defined(HAS_UTIME) || defined(HAS_FUTIMES) 1795 case OP_UTIME: 1796 APPLY_TAINT_PROPER(); 1797 if (sp - mark > 2) { 1798 #if defined(HAS_FUTIMES) 1799 struct timeval utbuf[2]; 1800 void *utbufp = utbuf; 1801 #elif defined(I_UTIME) || defined(VMS) 1802 struct utimbuf utbuf; 1803 struct utimbuf *utbufp = &utbuf; 1804 #else 1805 struct { 1806 Time_t actime; 1807 Time_t modtime; 1808 } utbuf; 1809 void *utbufp = &utbuf; 1810 #endif 1811 1812 SV* const accessed = *++mark; 1813 SV* const modified = *++mark; 1814 1815 /* Be like C, and if both times are undefined, let the C 1816 * library figure out what to do. This usually means 1817 * "current time". */ 1818 1819 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef ) 1820 utbufp = NULL; 1821 else { 1822 Zero(&utbuf, sizeof utbuf, char); 1823 #ifdef HAS_FUTIMES 1824 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */ 1825 utbuf[0].tv_usec = 0; 1826 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */ 1827 utbuf[1].tv_usec = 0; 1828 #elif defined(BIG_TIME) 1829 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */ 1830 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */ 1831 #else 1832 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */ 1833 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */ 1834 #endif 1835 } 1836 APPLY_TAINT_PROPER(); 1837 tot = sp - mark; 1838 while (++mark <= sp) { 1839 GV* gv; 1840 if (isGV_with_GP(*mark)) { 1841 gv = MUTABLE_GV(*mark); 1842 do_futimes: 1843 if (GvIO(gv) && IoIFP(GvIOp(gv))) { 1844 #ifdef HAS_FUTIMES 1845 APPLY_TAINT_PROPER(); 1846 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), 1847 (struct timeval *) utbufp)) 1848 tot--; 1849 #else 1850 Perl_die(aTHX_ PL_no_func, "futimes"); 1851 #endif 1852 } 1853 else { 1854 tot--; 1855 } 1856 } 1857 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) { 1858 gv = MUTABLE_GV(SvRV(*mark)); 1859 goto do_futimes; 1860 } 1861 else { 1862 const char * const name = SvPV_nolen_const(*mark); 1863 APPLY_TAINT_PROPER(); 1864 #ifdef HAS_FUTIMES 1865 if (utimes(name, (struct timeval *)utbufp)) 1866 #else 1867 if (PerlLIO_utime(name, utbufp)) 1868 #endif 1869 tot--; 1870 } 1871 1872 } 1873 } 1874 else 1875 tot = 0; 1876 break; 1877 #endif 1878 } 1879 return tot; 1880 1881 #undef APPLY_TAINT_PROPER 1882 } 1883 1884 /* Do the permissions allow some operation? Assumes statcache already set. */ 1885 #ifndef VMS /* VMS' cando is in vms.c */ 1886 bool 1887 Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp) 1888 /* effective is a flag, true for EUID, or for checking if the effective gid 1889 * is in the list of groups returned from getgroups(). 1890 */ 1891 { 1892 dVAR; 1893 1894 PERL_ARGS_ASSERT_CANDO; 1895 1896 #ifdef DOSISH 1897 /* [Comments and code from Len Reed] 1898 * MS-DOS "user" is similar to UNIX's "superuser," but can't write 1899 * to write-protected files. The execute permission bit is set 1900 * by the Miscrosoft C library stat() function for the following: 1901 * .exe files 1902 * .com files 1903 * .bat files 1904 * directories 1905 * All files and directories are readable. 1906 * Directories and special files, e.g. "CON", cannot be 1907 * write-protected. 1908 * [Comment by Tom Dinger -- a directory can have the write-protect 1909 * bit set in the file system, but DOS permits changes to 1910 * the directory anyway. In addition, all bets are off 1911 * here for networked software, such as Novell and 1912 * Sun's PC-NFS.] 1913 */ 1914 1915 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat 1916 * too so it will actually look into the files for magic numbers 1917 */ 1918 return (mode & statbufp->st_mode) ? TRUE : FALSE; 1919 1920 #else /* ! DOSISH */ 1921 # ifdef __CYGWIN__ 1922 if (ingroup(544,effective)) { /* member of Administrators */ 1923 # else 1924 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */ 1925 # endif 1926 if (mode == S_IXUSR) { 1927 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode)) 1928 return TRUE; 1929 } 1930 else 1931 return TRUE; /* root reads and writes anything */ 1932 return FALSE; 1933 } 1934 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) { 1935 if (statbufp->st_mode & mode) 1936 return TRUE; /* ok as "user" */ 1937 } 1938 else if (ingroup(statbufp->st_gid,effective)) { 1939 if (statbufp->st_mode & mode >> 3) 1940 return TRUE; /* ok as "group" */ 1941 } 1942 else if (statbufp->st_mode & mode >> 6) 1943 return TRUE; /* ok as "other" */ 1944 return FALSE; 1945 #endif /* ! DOSISH */ 1946 } 1947 #endif /* ! VMS */ 1948 1949 static bool 1950 S_ingroup(pTHX_ Gid_t testgid, bool effective) 1951 { 1952 dVAR; 1953 if (testgid == (effective ? PL_egid : PL_gid)) 1954 return TRUE; 1955 #ifdef HAS_GETGROUPS 1956 { 1957 Groups_t *gary = NULL; 1958 I32 anum; 1959 bool rc = FALSE; 1960 1961 anum = getgroups(0, gary); 1962 Newx(gary, anum, Groups_t); 1963 anum = getgroups(anum, gary); 1964 while (--anum >= 0) 1965 if (gary[anum] == testgid) { 1966 rc = TRUE; 1967 break; 1968 } 1969 1970 Safefree(gary); 1971 return rc; 1972 } 1973 #else 1974 return FALSE; 1975 #endif 1976 } 1977 1978 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) 1979 1980 I32 1981 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp) 1982 { 1983 dVAR; 1984 const key_t key = (key_t)SvNVx(*++mark); 1985 SV *nsv = optype == OP_MSGGET ? NULL : *++mark; 1986 const I32 flags = SvIVx(*++mark); 1987 1988 PERL_ARGS_ASSERT_DO_IPCGET; 1989 PERL_UNUSED_ARG(sp); 1990 1991 SETERRNO(0,0); 1992 switch (optype) 1993 { 1994 #ifdef HAS_MSG 1995 case OP_MSGGET: 1996 return msgget(key, flags); 1997 #endif 1998 #ifdef HAS_SEM 1999 case OP_SEMGET: 2000 return semget(key, (int) SvIV(nsv), flags); 2001 #endif 2002 #ifdef HAS_SHM 2003 case OP_SHMGET: 2004 return shmget(key, (size_t) SvUV(nsv), flags); 2005 #endif 2006 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) 2007 default: 2008 /* diag_listed_as: msg%s not implemented */ 2009 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); 2010 #endif 2011 } 2012 return -1; /* should never happen */ 2013 } 2014 2015 I32 2016 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp) 2017 { 2018 dVAR; 2019 char *a; 2020 I32 ret = -1; 2021 const I32 id = SvIVx(*++mark); 2022 #ifdef Semctl 2023 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0; 2024 #endif 2025 const I32 cmd = SvIVx(*++mark); 2026 SV * const astr = *++mark; 2027 STRLEN infosize = 0; 2028 I32 getinfo = (cmd == IPC_STAT); 2029 2030 PERL_ARGS_ASSERT_DO_IPCCTL; 2031 PERL_UNUSED_ARG(sp); 2032 2033 switch (optype) 2034 { 2035 #ifdef HAS_MSG 2036 case OP_MSGCTL: 2037 if (cmd == IPC_STAT || cmd == IPC_SET) 2038 infosize = sizeof(struct msqid_ds); 2039 break; 2040 #endif 2041 #ifdef HAS_SHM 2042 case OP_SHMCTL: 2043 if (cmd == IPC_STAT || cmd == IPC_SET) 2044 infosize = sizeof(struct shmid_ds); 2045 break; 2046 #endif 2047 #ifdef HAS_SEM 2048 case OP_SEMCTL: 2049 #ifdef Semctl 2050 if (cmd == IPC_STAT || cmd == IPC_SET) 2051 infosize = sizeof(struct semid_ds); 2052 else if (cmd == GETALL || cmd == SETALL) 2053 { 2054 struct semid_ds semds; 2055 union semun semun; 2056 #ifdef EXTRA_F_IN_SEMUN_BUF 2057 semun.buff = &semds; 2058 #else 2059 semun.buf = &semds; 2060 #endif 2061 getinfo = (cmd == GETALL); 2062 if (Semctl(id, 0, IPC_STAT, semun) == -1) 2063 return -1; 2064 infosize = semds.sem_nsems * sizeof(short); 2065 /* "short" is technically wrong but much more portable 2066 than guessing about u_?short(_t)? */ 2067 } 2068 #else 2069 /* diag_listed_as: sem%s not implemented */ 2070 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); 2071 #endif 2072 break; 2073 #endif 2074 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) 2075 default: 2076 /* diag_listed_as: shm%s not implemented */ 2077 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); 2078 #endif 2079 } 2080 2081 if (infosize) 2082 { 2083 if (getinfo) 2084 { 2085 SvPV_force_nolen(astr); 2086 a = SvGROW(astr, infosize+1); 2087 } 2088 else 2089 { 2090 STRLEN len; 2091 a = SvPV(astr, len); 2092 if (len != infosize) 2093 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld", 2094 PL_op_desc[optype], 2095 (unsigned long)len, 2096 (long)infosize); 2097 } 2098 } 2099 else 2100 { 2101 const IV i = SvIV(astr); 2102 a = INT2PTR(char *,i); /* ouch */ 2103 } 2104 SETERRNO(0,0); 2105 switch (optype) 2106 { 2107 #ifdef HAS_MSG 2108 case OP_MSGCTL: 2109 ret = msgctl(id, cmd, (struct msqid_ds *)a); 2110 break; 2111 #endif 2112 #ifdef HAS_SEM 2113 case OP_SEMCTL: { 2114 #ifdef Semctl 2115 union semun unsemds; 2116 2117 #ifdef EXTRA_F_IN_SEMUN_BUF 2118 unsemds.buff = (struct semid_ds *)a; 2119 #else 2120 unsemds.buf = (struct semid_ds *)a; 2121 #endif 2122 ret = Semctl(id, n, cmd, unsemds); 2123 #else 2124 /* diag_listed_as: sem%s not implemented */ 2125 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); 2126 #endif 2127 } 2128 break; 2129 #endif 2130 #ifdef HAS_SHM 2131 case OP_SHMCTL: 2132 ret = shmctl(id, cmd, (struct shmid_ds *)a); 2133 break; 2134 #endif 2135 } 2136 if (getinfo && ret >= 0) { 2137 SvCUR_set(astr, infosize); 2138 *SvEND(astr) = '\0'; 2139 SvSETMAGIC(astr); 2140 } 2141 return ret; 2142 } 2143 2144 I32 2145 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp) 2146 { 2147 dVAR; 2148 #ifdef HAS_MSG 2149 STRLEN len; 2150 const I32 id = SvIVx(*++mark); 2151 SV * const mstr = *++mark; 2152 const I32 flags = SvIVx(*++mark); 2153 const char * const mbuf = SvPV_const(mstr, len); 2154 const I32 msize = len - sizeof(long); 2155 2156 PERL_ARGS_ASSERT_DO_MSGSND; 2157 PERL_UNUSED_ARG(sp); 2158 2159 if (msize < 0) 2160 Perl_croak(aTHX_ "Arg too short for msgsnd"); 2161 SETERRNO(0,0); 2162 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags); 2163 #else 2164 PERL_UNUSED_ARG(sp); 2165 PERL_UNUSED_ARG(mark); 2166 /* diag_listed_as: msg%s not implemented */ 2167 Perl_croak(aTHX_ "msgsnd not implemented"); 2168 #endif 2169 } 2170 2171 I32 2172 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp) 2173 { 2174 #ifdef HAS_MSG 2175 dVAR; 2176 char *mbuf; 2177 long mtype; 2178 I32 msize, flags, ret; 2179 const I32 id = SvIVx(*++mark); 2180 SV * const mstr = *++mark; 2181 2182 PERL_ARGS_ASSERT_DO_MSGRCV; 2183 PERL_UNUSED_ARG(sp); 2184 2185 /* suppress warning when reading into undef var --jhi */ 2186 if (! SvOK(mstr)) 2187 sv_setpvs(mstr, ""); 2188 msize = SvIVx(*++mark); 2189 mtype = (long)SvIVx(*++mark); 2190 flags = SvIVx(*++mark); 2191 SvPV_force_nolen(mstr); 2192 mbuf = SvGROW(mstr, sizeof(long)+msize+1); 2193 2194 SETERRNO(0,0); 2195 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags); 2196 if (ret >= 0) { 2197 SvCUR_set(mstr, sizeof(long)+ret); 2198 *SvEND(mstr) = '\0'; 2199 #ifndef INCOMPLETE_TAINTS 2200 /* who knows who has been playing with this message? */ 2201 SvTAINTED_on(mstr); 2202 #endif 2203 } 2204 return ret; 2205 #else 2206 PERL_UNUSED_ARG(sp); 2207 PERL_UNUSED_ARG(mark); 2208 /* diag_listed_as: msg%s not implemented */ 2209 Perl_croak(aTHX_ "msgrcv not implemented"); 2210 #endif 2211 } 2212 2213 I32 2214 Perl_do_semop(pTHX_ SV **mark, SV **sp) 2215 { 2216 #ifdef HAS_SEM 2217 dVAR; 2218 STRLEN opsize; 2219 const I32 id = SvIVx(*++mark); 2220 SV * const opstr = *++mark; 2221 const char * const opbuf = SvPV_const(opstr, opsize); 2222 2223 PERL_ARGS_ASSERT_DO_SEMOP; 2224 PERL_UNUSED_ARG(sp); 2225 2226 if (opsize < 3 * SHORTSIZE 2227 || (opsize % (3 * SHORTSIZE))) { 2228 SETERRNO(EINVAL,LIB_INVARG); 2229 return -1; 2230 } 2231 SETERRNO(0,0); 2232 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */ 2233 { 2234 const int nsops = opsize / (3 * sizeof (short)); 2235 int i = nsops; 2236 short * const ops = (short *) opbuf; 2237 short *o = ops; 2238 struct sembuf *temps, *t; 2239 I32 result; 2240 2241 Newx (temps, nsops, struct sembuf); 2242 t = temps; 2243 while (i--) { 2244 t->sem_num = *o++; 2245 t->sem_op = *o++; 2246 t->sem_flg = *o++; 2247 t++; 2248 } 2249 result = semop(id, temps, nsops); 2250 t = temps; 2251 o = ops; 2252 i = nsops; 2253 while (i--) { 2254 *o++ = t->sem_num; 2255 *o++ = t->sem_op; 2256 *o++ = t->sem_flg; 2257 t++; 2258 } 2259 Safefree(temps); 2260 return result; 2261 } 2262 #else 2263 /* diag_listed_as: sem%s not implemented */ 2264 Perl_croak(aTHX_ "semop not implemented"); 2265 #endif 2266 } 2267 2268 I32 2269 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp) 2270 { 2271 #ifdef HAS_SHM 2272 dVAR; 2273 char *shm; 2274 struct shmid_ds shmds; 2275 const I32 id = SvIVx(*++mark); 2276 SV * const mstr = *++mark; 2277 const I32 mpos = SvIVx(*++mark); 2278 const I32 msize = SvIVx(*++mark); 2279 2280 PERL_ARGS_ASSERT_DO_SHMIO; 2281 PERL_UNUSED_ARG(sp); 2282 2283 SETERRNO(0,0); 2284 if (shmctl(id, IPC_STAT, &shmds) == -1) 2285 return -1; 2286 if (mpos < 0 || msize < 0 2287 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) { 2288 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */ 2289 return -1; 2290 } 2291 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0); 2292 if (shm == (char *)-1) /* I hate System V IPC, I really do */ 2293 return -1; 2294 if (optype == OP_SHMREAD) { 2295 char *mbuf; 2296 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */ 2297 if (! SvOK(mstr)) 2298 sv_setpvs(mstr, ""); 2299 SvPV_force_nolen(mstr); 2300 mbuf = SvGROW(mstr, (STRLEN)msize+1); 2301 2302 Copy(shm + mpos, mbuf, msize, char); 2303 SvCUR_set(mstr, msize); 2304 *SvEND(mstr) = '\0'; 2305 SvSETMAGIC(mstr); 2306 #ifndef INCOMPLETE_TAINTS 2307 /* who knows who has been playing with this shared memory? */ 2308 SvTAINTED_on(mstr); 2309 #endif 2310 } 2311 else { 2312 STRLEN len; 2313 2314 const char *mbuf = SvPV_const(mstr, len); 2315 const I32 n = ((I32)len > msize) ? msize : (I32)len; 2316 Copy(mbuf, shm + mpos, n, char); 2317 if (n < msize) 2318 memzero(shm + mpos + n, msize - n); 2319 } 2320 return shmdt(shm); 2321 #else 2322 /* diag_listed_as: shm%s not implemented */ 2323 Perl_croak(aTHX_ "shm I/O not implemented"); 2324 #endif 2325 } 2326 2327 #endif /* SYSV IPC */ 2328 2329 /* 2330 =head1 IO Functions 2331 2332 =for apidoc start_glob 2333 2334 Function called by C<do_readline> to spawn a glob (or do the glob inside 2335 perl on VMS). This code used to be inline, but now perl uses C<File::Glob> 2336 this glob starter is only used by miniperl during the build process. 2337 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up. 2338 2339 =cut 2340 */ 2341 2342 PerlIO * 2343 Perl_start_glob (pTHX_ SV *tmpglob, IO *io) 2344 { 2345 dVAR; 2346 SV * const tmpcmd = newSV(0); 2347 PerlIO *fp; 2348 2349 PERL_ARGS_ASSERT_START_GLOB; 2350 2351 ENTER; 2352 SAVEFREESV(tmpcmd); 2353 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */ 2354 /* since spawning off a process is a real performance hit */ 2355 2356 PerlIO * 2357 Perl_vms_start_glob 2358 (pTHX_ SV *tmpglob, 2359 IO *io); 2360 2361 fp = Perl_vms_start_glob(aTHX_ tmpglob, io); 2362 2363 #else /* !VMS */ 2364 #ifdef DOSISH 2365 #ifdef OS2 2366 sv_setpv(tmpcmd, "for a in "); 2367 sv_catsv(tmpcmd, tmpglob); 2368 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |"); 2369 #else 2370 #ifdef DJGPP 2371 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */ 2372 sv_catsv(tmpcmd, tmpglob); 2373 #else 2374 sv_setpv(tmpcmd, "perlglob "); 2375 sv_catsv(tmpcmd, tmpglob); 2376 sv_catpv(tmpcmd, " |"); 2377 #endif /* !DJGPP */ 2378 #endif /* !OS2 */ 2379 #else /* !DOSISH */ 2380 #if defined(CSH) 2381 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen); 2382 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob "); 2383 sv_catsv(tmpcmd, tmpglob); 2384 sv_catpv(tmpcmd, "' 2>/dev/null |"); 2385 #else 2386 sv_setpv(tmpcmd, "echo "); 2387 sv_catsv(tmpcmd, tmpglob); 2388 #if 'z' - 'a' == 25 2389 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|"); 2390 #else 2391 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|"); 2392 #endif 2393 #endif /* !CSH */ 2394 #endif /* !DOSISH */ 2395 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd), 2396 FALSE, O_RDONLY, 0, NULL); 2397 fp = IoIFP(io); 2398 #endif /* !VMS */ 2399 LEAVE; 2400 return fp; 2401 } 2402 2403 /* 2404 * Local variables: 2405 * c-indentation-style: bsd 2406 * c-basic-offset: 4 2407 * indent-tabs-mode: t 2408 * End: 2409 * 2410 * ex: set ts=8 sts=4 sw=4 noet: 2411 */ 2412