source: vendor/perl/5.8.8/doio.c

Last change on this file was 3181, checked in by bird, 18 years ago

perl 5.8.8
File size: 61.1 KB
RevLine 
[3181]1/* doio.c
2 *
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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
18/* This file contains functions that do the actual I/O on behalf of ops.
19 * For example, pp_print() calls the do_print() function in this file for
20 * each argument needing printing.
21 */
22
23#include "EXTERN.h"
24#define PERL_IN_DOIO_C
25#include "perl.h"
26
27#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
28#ifndef HAS_SEM
29#include <sys/ipc.h>
30#endif
31#ifdef HAS_MSG
32#include <sys/msg.h>
33#endif
34#ifdef HAS_SHM
35#include <sys/shm.h>
36# ifndef HAS_SHMAT_PROTOTYPE
37 extern Shmat_t shmat (int, char *, int);
38# endif
39#endif
40#endif
41
42#ifdef I_UTIME
43# if defined(_MSC_VER) || defined(__MINGW32__)
44# include <sys/utime.h>
45# else
46# include <utime.h>
47# endif
48#endif
49
50#ifdef O_EXCL
51# define OPEN_EXCL O_EXCL
52#else
53# define OPEN_EXCL 0
54#endif
55
56#define PERL_MODE_MAX 8
57#define PERL_FLAGS_MAX 10
58
59#include <signal.h>
60
61bool
62Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
63 int rawmode, int rawperm, PerlIO *supplied_fp)
64{
65 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
66 supplied_fp, (SV **) NULL, 0);
67}
68
69bool
70Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
71 int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
72 I32 num_svs)
73{
74 PERL_UNUSED_ARG(num_svs);
75 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
76 supplied_fp, &svs, 1);
77}
78
79bool
80Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
81 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
82 I32 num_svs)
83{
84 register IO * const io = GvIOn(gv);
85 PerlIO *saveifp = Nullfp;
86 PerlIO *saveofp = Nullfp;
87 int savefd = -1;
88 char savetype = IoTYPE_CLOSED;
89 int writing = 0;
90 PerlIO *fp;
91 int fd;
92 int result;
93 bool was_fdopen = FALSE;
94 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
95 char *type = NULL;
96 char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
97 SV *namesv;
98
99 Zero(mode,sizeof(mode),char);
100 PL_forkprocess = 1; /* assume true if no fork */
101
102 /* Collect default raw/crlf info from the op */
103 if (PL_op && PL_op->op_type == OP_OPEN) {
104 /* set up IO layers */
105 const U8 flags = PL_op->op_private;
106 in_raw = (flags & OPpOPEN_IN_RAW);
107 in_crlf = (flags & OPpOPEN_IN_CRLF);
108 out_raw = (flags & OPpOPEN_OUT_RAW);
109 out_crlf = (flags & OPpOPEN_OUT_CRLF);
110 }
111
112 /* If currently open - close before we re-open */
113 if (IoIFP(io)) {
114 fd = PerlIO_fileno(IoIFP(io));
115 if (IoTYPE(io) == IoTYPE_STD) {
116 /* This is a clone of one of STD* handles */
117 result = 0;
118 }
119 else if (fd >= 0 && fd <= PL_maxsysfd) {
120 /* This is one of the original STD* handles */
121 saveifp = IoIFP(io);
122 saveofp = IoOFP(io);
123 savetype = IoTYPE(io);
124 savefd = fd;
125 result = 0;
126 }
127 else if (IoTYPE(io) == IoTYPE_PIPE)
128 result = PerlProc_pclose(IoIFP(io));
129 else if (IoIFP(io) != IoOFP(io)) {
130 if (IoOFP(io)) {
131 result = PerlIO_close(IoOFP(io));
132 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
133 }
134 else
135 result = PerlIO_close(IoIFP(io));
136 }
137 else
138 result = PerlIO_close(IoIFP(io));
139 if (result == EOF && fd > PL_maxsysfd) {
140 /* Why is this not Perl_warn*() call ? */
141 PerlIO_printf(Perl_error_log,
142 "Warning: unable to close filehandle %s properly.\n",
143 GvENAME(gv));
144 }
145 IoOFP(io) = IoIFP(io) = Nullfp;
146 }
147
148 if (as_raw) {
149 /* sysopen style args, i.e. integer mode and permissions */
150 STRLEN ix = 0;
151 const int appendtrunc =
152 0
153#ifdef O_APPEND /* Not fully portable. */
154 |O_APPEND
155#endif
156#ifdef O_TRUNC /* Not fully portable. */
157 |O_TRUNC
158#endif
159 ;
160 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
161 int ismodifying;
162
163 if (num_svs != 0) {
164 Perl_croak(aTHX_ "panic: sysopen with multiple args");
165 }
166 /* It's not always
167
168 O_RDONLY 0
169 O_WRONLY 1
170 O_RDWR 2
171
172 It might be (in OS/390 and Mac OS Classic it is)
173
174 O_WRONLY 1
175 O_RDONLY 2
176 O_RDWR 3
177
178 This means that simple & with O_RDWR would look
179 like O_RDONLY is present. Therefore we have to
180 be more careful.
181 */
182 if ((ismodifying = (rawmode & modifyingmode))) {
183 if ((ismodifying & O_WRONLY) == O_WRONLY ||
184 (ismodifying & O_RDWR) == O_RDWR ||
185 (ismodifying & (O_CREAT|appendtrunc)))
186 TAINT_PROPER("sysopen");
187 }
188 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
189
190#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
191 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
192#endif
193
194 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
195
196 namesv = sv_2mortal(newSVpvn(name,strlen(name)));
197 num_svs = 1;
198 svp = &namesv;
199 type = Nullch;
200 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
201 }
202 else {
203 /* Regular (non-sys) open */
204 char *oname = name;
205 STRLEN olen = len;
206 char *tend;
207 int dodup = 0;
208 PerlIO *that_fp = NULL;
209
210 type = savepvn(name, len);
211 tend = type+len;
212 SAVEFREEPV(type);
213
214 /* Lose leading and trailing white space */
215 for (; isSPACE(*type); type++) ;
216 while (tend > type && isSPACE(tend[-1]))
217 *--tend = '\0';
218
219 if (num_svs) {
220 /* New style explicit name, type is just mode and layer info */
221#ifdef USE_STDIO
222 if (SvROK(*svp) && !strchr(name,'&')) {
223 if (ckWARN(WARN_IO))
224 Perl_warner(aTHX_ packWARN(WARN_IO),
225 "Can't open a reference");
226 SETERRNO(EINVAL, LIB_INVARG);
227 goto say_false;
228 }
229#endif /* USE_STDIO */
230 name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
231 SAVEFREEPV(name);
232 }
233 else {
234 name = type;
235 len = tend-type;
236 }
237 IoTYPE(io) = *type;
238 if ((*type == IoTYPE_RDWR) && /* scary */
239 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
240 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
241 TAINT_PROPER("open");
242 mode[1] = *type++;
243 writing = 1;
244 }
245
246 if (*type == IoTYPE_PIPE) {
247 if (num_svs) {
248 if (type[1] != IoTYPE_STD) {
249 unknown_open_mode:
250 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
251 }
252 type++;
253 }
254 for (type++; isSPACE(*type); type++) ;
255 if (!num_svs) {
256 name = type;
257 len = tend-type;
258 }
259 if (*name == '\0') {
260 /* command is missing 19990114 */
261 if (ckWARN(WARN_PIPE))
262 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
263 errno = EPIPE;
264 goto say_false;
265 }
266 if ((*name == '-' && name[1] == '\0') || num_svs)
267 TAINT_ENV();
268 TAINT_PROPER("piped open");
269 if (!num_svs && name[len-1] == '|') {
270 name[--len] = '\0' ;
271 if (ckWARN(WARN_PIPE))
272 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
273 }
274 mode[0] = 'w';
275 writing = 1;
276#ifdef HAS_STRLCAT
277 if (out_raw)
278 strlcat(mode, "b", PERL_MODE_MAX);
279 else if (out_crlf)
280 strlcat(mode, "t", PERL_MODE_MAX);
281#else
282 if (out_raw)
283 strcat(mode, "b");
284 else if (out_crlf)
285 strcat(mode, "t");
286#endif
287 if (num_svs > 1) {
288 fp = PerlProc_popen_list(mode, num_svs, svp);
289 }
290 else {
291 fp = PerlProc_popen(name,mode);
292 }
293 if (num_svs) {
294 if (*type) {
295 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
296 goto say_false;
297 }
298 }
299 }
300 } /* IoTYPE_PIPE */
301 else if (*type == IoTYPE_WRONLY) {
302 TAINT_PROPER("open");
303 type++;
304 if (*type == IoTYPE_WRONLY) {
305 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
306 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
307 type++;
308 }
309 else {
310 mode[0] = 'w';
311 }
312 writing = 1;
313
314#ifdef HAS_STRLCAT
315 if (out_raw)
316 strlcat(mode, "b", PERL_MODE_MAX);
317 else if (out_crlf)
318 strlcat(mode, "t", PERL_MODE_MAX);
319#else
320 if (out_raw)
321 strcat(mode, "b");
322 else if (out_crlf)
323 strcat(mode, "t");
324#endif
325 if (*type == '&') {
326 duplicity:
327 dodup = PERLIO_DUP_FD;
328 type++;
329 if (*type == '=') {
330 dodup = 0;
331 type++;
332 }
333 if (!num_svs && !*type && supplied_fp) {
334 /* "<+&" etc. is used by typemaps */
335 fp = supplied_fp;
336 }
337 else {
338 if (num_svs > 1) {
339 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
340 }
341 for (; isSPACE(*type); type++) ;
342 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
343 fd = SvUV(*svp);
344 num_svs = 0;
345 }
346 else if (isDIGIT(*type)) {
347 fd = atoi(type);
348 }
349 else {
350 const IO* thatio;
351 if (num_svs) {
352 thatio = sv_2io(*svp);
353 }
354 else {
355 GV *thatgv;
356 thatgv = gv_fetchpv(type,FALSE,SVt_PVIO);
357 thatio = GvIO(thatgv);
358 }
359 if (!thatio) {
360#ifdef EINVAL
361 SETERRNO(EINVAL,SS_IVCHAN);
362#endif
363 goto say_false;
364 }
365 if ((that_fp = IoIFP(thatio))) {
366 /* Flush stdio buffer before dup. --mjd
367 * Unfortunately SEEK_CURing 0 seems to
368 * be optimized away on most platforms;
369 * only Solaris and Linux seem to flush
370 * on that. --jhi */
371#ifdef USE_SFIO
372 /* sfio fails to clear error on next
373 sfwrite, contrary to documentation.
374 -- Nicholas Clark */
375 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
376 PerlIO_clearerr(that_fp);
377#endif
378 /* On the other hand, do all platforms
379 * take gracefully to flushing a read-only
380 * filehandle? Perhaps we should do
381 * fsetpos(src)+fgetpos(dst)? --nik */
382 PerlIO_flush(that_fp);
383 fd = PerlIO_fileno(that_fp);
384 /* When dup()ing STDIN, STDOUT or STDERR
385 * explicitly set appropriate access mode */
386 if (that_fp == PerlIO_stdout()
387 || that_fp == PerlIO_stderr())
388 IoTYPE(io) = IoTYPE_WRONLY;
389 else if (that_fp == PerlIO_stdin())
390 IoTYPE(io) = IoTYPE_RDONLY;
391 /* When dup()ing a socket, say result is
392 * one as well */
393 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
394 IoTYPE(io) = IoTYPE_SOCKET;
395 }
396 else
397 fd = -1;
398 }
399 if (!num_svs)
400 type = Nullch;
401 if (that_fp) {
402 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
403 }
404 else {
405 if (dodup)
406 fd = PerlLIO_dup(fd);
407 else
408 was_fdopen = TRUE;
409 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
410 if (dodup && fd >= 0)
411 PerlLIO_close(fd);
412 }
413 }
414 }
415 } /* & */
416 else {
417 for (; isSPACE(*type); type++) ;
418 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
419 type++;
420 fp = PerlIO_stdout();
421 IoTYPE(io) = IoTYPE_STD;
422 if (num_svs > 1) {
423 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
424 }
425 }
426 else {
427 if (!num_svs) {
428 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
429 num_svs = 1;
430 svp = &namesv;
431 type = Nullch;
432 }
433 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
434 }
435 } /* !& */
436 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
437 goto unknown_open_mode;
438 } /* IoTYPE_WRONLY */
439 else if (*type == IoTYPE_RDONLY) {
440 for (type++; isSPACE(*type); type++) ;
441 mode[0] = 'r';
442#ifdef HAS_STRLCAT
443 if (in_raw)
444 strlcat(mode, "b", PERL_MODE_MAX);
445 else if (in_crlf)
446 strlcat(mode, "t", PERL_MODE_MAX);
447#else
448 if (in_raw)
449 strcat(mode, "b");
450 else if (in_crlf)
451 strcat(mode, "t");
452#endif
453 if (*type == '&') {
454 goto duplicity;
455 }
456 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
457 type++;
458 fp = PerlIO_stdin();
459 IoTYPE(io) = IoTYPE_STD;
460 if (num_svs > 1) {
461 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
462 }
463 }
464 else {
465 if (!num_svs) {
466 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
467 num_svs = 1;
468 svp = &namesv;
469 type = Nullch;
470 }
471 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
472 }
473 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
474 goto unknown_open_mode;
475 } /* IoTYPE_RDONLY */
476 else if ((num_svs && /* '-|...' or '...|' */
477 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
478 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
479 if (num_svs) {
480 type += 2; /* skip over '-|' */
481 }
482 else {
483 *--tend = '\0';
484 while (tend > type && isSPACE(tend[-1]))
485 *--tend = '\0';
486 for (; isSPACE(*type); type++)
487 ;
488 name = type;
489 len = tend-type;
490 }
491 if (*name == '\0') {
492 /* command is missing 19990114 */
493 if (ckWARN(WARN_PIPE))
494 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
495 errno = EPIPE;
496 goto say_false;
497 }
498 if (!(*name == '-' && name[1] == '\0') || num_svs)
499 TAINT_ENV();
500 TAINT_PROPER("piped open");
501 mode[0] = 'r';
502
503#ifdef HAS_STRLCAT
504 if (in_raw)
505 strlcat(mode, "b", PERL_MODE_MAX);
506 else if (in_crlf)
507 strlcat(mode, "t", PERL_MODE_MAX);
508#else
509 if (in_raw)
510 strcat(mode, "b");
511 else if (in_crlf)
512 strcat(mode, "t");
513#endif
514
515 if (num_svs > 1) {
516 fp = PerlProc_popen_list(mode,num_svs,svp);
517 }
518 else {
519 fp = PerlProc_popen(name,mode);
520 }
521 IoTYPE(io) = IoTYPE_PIPE;
522 if (num_svs) {
523 for (; isSPACE(*type); type++) ;
524 if (*type) {
525 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
526 goto say_false;
527 }
528 }
529 }
530 }
531 else { /* layer(Args) */
532 if (num_svs)
533 goto unknown_open_mode;
534 name = type;
535 IoTYPE(io) = IoTYPE_RDONLY;
536 for (; isSPACE(*name); name++)
537 ;
538 mode[0] = 'r';
539
540#ifdef HAS_STRLCAT
541 if (in_raw)
542 strlcat(mode, "b", PERL_MODE_MAX);
543 else if (in_crlf)
544 strlcat(mode, "t", PERL_MODE_MAX);
545#else
546 if (in_raw)
547 strcat(mode, "b");
548 else if (in_crlf)
549 strcat(mode, "t");
550#endif
551
552 if (*name == '-' && name[1] == '\0') {
553 fp = PerlIO_stdin();
554 IoTYPE(io) = IoTYPE_STD;
555 }
556 else {
557 if (!num_svs) {
558 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
559 num_svs = 1;
560 svp = &namesv;
561 type = Nullch;
562 }
563 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
564 }
565 }
566 }
567 if (!fp) {
568 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
569 && strchr(name, '\n')
570
571 )
572 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
573 goto say_false;
574 }
575
576 if (ckWARN(WARN_IO)) {
577 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
578 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
579 Perl_warner(aTHX_ packWARN(WARN_IO),
580 "Filehandle STD%s reopened as %s only for input",
581 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
582 GvENAME(gv));
583 }
584 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
585 Perl_warner(aTHX_ packWARN(WARN_IO),
586 "Filehandle STDIN reopened as %s only for output",
587 GvENAME(gv));
588 }
589 }
590
591 fd = PerlIO_fileno(fp);
592 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
593 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
594 * type probe for socket-ness.
595 */
596 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
597 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
598 /* If PerlIO claims to have fd we had better be able to fstat() it. */
599 (void) PerlIO_close(fp);
600 goto say_false;
601 }
602#ifndef PERL_MICRO
603 if (S_ISSOCK(PL_statbuf.st_mode))
604 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
605#ifdef HAS_SOCKET
606 else if (
607#ifdef S_IFMT
608 !(PL_statbuf.st_mode & S_IFMT)
609#else
610 !PL_statbuf.st_mode
611#endif
612 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
613 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
614 ) { /* on OS's that return 0 on fstat()ed pipe */
615 char tmpbuf[256];
616 Sock_size_t buflen = sizeof tmpbuf;
617 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
618 || errno != ENOTSOCK)
619 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
620 /* but some return 0 for streams too, sigh */
621 }
622#endif /* HAS_SOCKET */
623#endif /* !PERL_MICRO */
624 }
625
626 /* Eeek - FIXME !!!
627 * If this is a standard handle we discard all the layer stuff
628 * and just dup the fd into whatever was on the handle before !
629 */
630
631 if (saveifp) { /* must use old fp? */
632 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
633 then dup the new fileno down
634 */
635 if (saveofp) {
636 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
637 if (saveofp != saveifp) { /* was a socket? */
638 PerlIO_close(saveofp);
639 }
640 }
641 if (savefd != fd) {
642 /* Still a small can-of-worms here if (say) PerlIO::scalar
643 is assigned to (say) STDOUT - for now let dup2() fail
644 and provide the error
645 */
646 if (PerlLIO_dup2(fd, savefd) < 0) {
647 (void)PerlIO_close(fp);
648 goto say_false;
649 }
650#ifdef VMS
651 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
652 char newname[FILENAME_MAX+1];
653 if (PerlIO_getname(fp, newname)) {
654 if (fd == PerlIO_fileno(PerlIO_stdout()))
655 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
656 if (fd == PerlIO_fileno(PerlIO_stderr()))
657 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
658 }
659 }
660#endif
661
662#if !defined(WIN32)
663 /* PL_fdpid isn't used on Windows, so avoid this useless work.
664 * XXX Probably the same for a lot of other places. */
665 {
666 Pid_t pid;
667 SV *sv;
668
669 LOCK_FDPID_MUTEX;
670 sv = *av_fetch(PL_fdpid,fd,TRUE);
671 (void)SvUPGRADE(sv, SVt_IV);
672 pid = SvIVX(sv);
673 SvIV_set(sv, 0);
674 sv = *av_fetch(PL_fdpid,savefd,TRUE);
675 (void)SvUPGRADE(sv, SVt_IV);
676 SvIV_set(sv, pid);
677 UNLOCK_FDPID_MUTEX;
678 }
679#endif
680
681 if (was_fdopen) {
682 /* need to close fp without closing underlying fd */
683 int ofd = PerlIO_fileno(fp);
684 int dupfd = PerlLIO_dup(ofd);
685#if defined(HAS_FCNTL) && defined(F_SETFD)
686 /* Assume if we have F_SETFD we have F_GETFD */
687 int coe = fcntl(ofd,F_GETFD);
688#endif
689 PerlIO_close(fp);
690 PerlLIO_dup2(dupfd,ofd);
691#if defined(HAS_FCNTL) && defined(F_SETFD)
692 /* The dup trick has lost close-on-exec on ofd */
693 fcntl(ofd,F_SETFD, coe);
694#endif
695 PerlLIO_close(dupfd);
696 }
697 else
698 PerlIO_close(fp);
699 }
700 fp = saveifp;
701 PerlIO_clearerr(fp);
702 fd = PerlIO_fileno(fp);
703 }
704#if defined(HAS_FCNTL) && defined(F_SETFD)
705 if (fd >= 0) {
706 int save_errno = errno;
707 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
708 errno = save_errno;
709 }
710#endif
711 IoIFP(io) = fp;
712
713 IoFLAGS(io) &= ~IOf_NOLINE;
714 if (writing) {
715 if (IoTYPE(io) == IoTYPE_SOCKET
716 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
717 char *s = mode;
718 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
719 s++;
720 *s = 'w';
721 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
722 PerlIO_close(fp);
723 IoIFP(io) = Nullfp;
724 goto say_false;
725 }
726 }
727 else
728 IoOFP(io) = fp;
729 }
730 return TRUE;
731
732say_false:
733 IoIFP(io) = saveifp;
734 IoOFP(io) = saveofp;
735 IoTYPE(io) = savetype;
736 return FALSE;
737}
738
739PerlIO *
740Perl_nextargv(pTHX_ register GV *gv)
741{
742 register SV *sv;
743#ifndef FLEXFILENAMES
744 int filedev;
745 int fileino;
746#endif
747 Uid_t fileuid;
748 Gid_t filegid;
749 IO * const io = GvIOp(gv);
750
751 if (!PL_argvoutgv)
752 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
753 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
754 IoFLAGS(io) &= ~IOf_START;
755 if (PL_inplace) {
756 if (!PL_argvout_stack)
757 PL_argvout_stack = newAV();
758 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
759 }
760 }
761 if (PL_filemode & (S_ISUID|S_ISGID)) {
762 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
763#ifdef HAS_FCHMOD
764 if (PL_lastfd != -1)
765 (void)fchmod(PL_lastfd,PL_filemode);
766#else
767 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
768#endif
769 }
770 PL_lastfd = -1;
771 PL_filemode = 0;
772 if (!GvAV(gv))
773 return Nullfp;
774 while (av_len(GvAV(gv)) >= 0) {
775 STRLEN oldlen;
776 sv = av_shift(GvAV(gv));
777 SAVEFREESV(sv);
778 sv_setsv(GvSVn(gv),sv);
779 SvSETMAGIC(GvSV(gv));
780 PL_oldname = SvPVx(GvSV(gv), oldlen);
781 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
782 if (PL_inplace) {
783 TAINT_PROPER("inplace open");
784 if (oldlen == 1 && *PL_oldname == '-') {
785 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
786 return IoIFP(GvIOp(gv));
787 }
788#ifndef FLEXFILENAMES
789 filedev = PL_statbuf.st_dev;
790 fileino = PL_statbuf.st_ino;
791#endif
792 PL_filemode = PL_statbuf.st_mode;
793 fileuid = PL_statbuf.st_uid;
794 filegid = PL_statbuf.st_gid;
795 if (!S_ISREG(PL_filemode)) {
796 if (ckWARN_d(WARN_INPLACE))
797 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
798 "Can't do inplace edit: %s is not a regular file",
799 PL_oldname );
800 do_close(gv,FALSE);
801 continue;
802 }
803 if (*PL_inplace) {
804 const char *star = strchr(PL_inplace, '*');
805 if (star) {
806 const char *begin = PL_inplace;
807 sv_setpvn(sv, "", 0);
808 do {
809 sv_catpvn(sv, begin, star - begin);
810 sv_catpvn(sv, PL_oldname, oldlen);
811 begin = ++star;
812 } while ((star = strchr(begin, '*')));
813 if (*begin)
814 sv_catpv(sv,begin);
815 }
816 else {
817 sv_catpv(sv,PL_inplace);
818 }
819#ifndef FLEXFILENAMES
820 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
821 && PL_statbuf.st_dev == filedev
822 && PL_statbuf.st_ino == fileino)
823#ifdef DJGPP
824 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
825#endif
826 )
827 {
828 if (ckWARN_d(WARN_INPLACE))
829 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
830 "Can't do inplace edit: %"SVf" would not be unique",
831 sv);
832 do_close(gv,FALSE);
833 continue;
834 }
835#endif
836#ifdef HAS_RENAME
837#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
838 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
839 if (ckWARN_d(WARN_INPLACE))
840 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
841 "Can't rename %s to %"SVf": %s, skipping file",
842 PL_oldname, sv, Strerror(errno) );
843 do_close(gv,FALSE);
844 continue;
845 }
846#else
847 do_close(gv,FALSE);
848 (void)PerlLIO_unlink(SvPVX_const(sv));
849 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
850 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
851 O_RDONLY,0,Nullfp);
852#endif /* DOSISH */
853#else
854 (void)UNLINK(SvPVX_const(sv));
855 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
856 if (ckWARN_d(WARN_INPLACE))
857 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
858 "Can't rename %s to %"SVf": %s, skipping file",
859 PL_oldname, sv, Strerror(errno) );
860 do_close(gv,FALSE);
861 continue;
862 }
863 (void)UNLINK(PL_oldname);
864#endif
865 }
866 else {
867#if !defined(DOSISH) && !defined(AMIGAOS)
868# ifndef VMS /* Don't delete; use automatic file versioning */
869 if (UNLINK(PL_oldname) < 0) {
870 if (ckWARN_d(WARN_INPLACE))
871 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
872 "Can't remove %s: %s, skipping file",
873 PL_oldname, Strerror(errno) );
874 do_close(gv,FALSE);
875 continue;
876 }
877# endif
878#else
879 Perl_croak(aTHX_ "Can't do inplace edit without backup");
880#endif
881 }
882
883 sv_setpvn(sv,">",!PL_inplace);
884 sv_catpvn(sv,PL_oldname,oldlen);
885 SETERRNO(0,0); /* in case sprintf set errno */
886#ifdef VMS
887 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
888 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
889#else
890 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
891 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
892 Nullfp))
893#endif
894 {
895 if (ckWARN_d(WARN_INPLACE))
896 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
897 PL_oldname, Strerror(errno) );
898 do_close(gv,FALSE);
899 continue;
900 }
901 setdefout(PL_argvoutgv);
902 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
903 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
904#ifdef HAS_FCHMOD
905 (void)fchmod(PL_lastfd,PL_filemode);
906#else
907# if !(defined(WIN32) && defined(__BORLANDC__))
908 /* Borland runtime creates a readonly file! */
909 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
910# endif
911#endif
912 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
913#ifdef HAS_FCHOWN
914 (void)fchown(PL_lastfd,fileuid,filegid);
915#else
916#ifdef HAS_CHOWN
917 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
918#endif
919#endif
920 }
921 }
922 return IoIFP(GvIOp(gv));
923 }
924 else {
925 if (ckWARN_d(WARN_INPLACE)) {
926 const int eno = errno;
927 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
928 && !S_ISREG(PL_statbuf.st_mode))
929 {
930 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
931 "Can't do inplace edit: %s is not a regular file",
932 PL_oldname);
933 }
934 else
935 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
936 PL_oldname, Strerror(eno));
937 }
938 }
939 }
940 if (io && (IoFLAGS(io) & IOf_ARGV))
941 IoFLAGS(io) |= IOf_START;
942 if (PL_inplace) {
943 (void)do_close(PL_argvoutgv,FALSE);
944 if (io && (IoFLAGS(io) & IOf_ARGV)
945 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
946 {
947 GV *oldout = (GV*)av_pop(PL_argvout_stack);
948 setdefout(oldout);
949 SvREFCNT_dec(oldout);
950 return Nullfp;
951 }
952 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
953 }
954 return Nullfp;
955}
956
957#ifdef HAS_PIPE
958void
959Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
960{
961 register IO *rstio;
962 register IO *wstio;
963 int fd[2];
964
965 if (!rgv)
966 goto badexit;
967 if (!wgv)
968 goto badexit;
969
970 rstio = GvIOn(rgv);
971 wstio = GvIOn(wgv);
972
973 if (IoIFP(rstio))
974 do_close(rgv,FALSE);
975 if (IoIFP(wstio))
976 do_close(wgv,FALSE);
977
978 if (PerlProc_pipe(fd) < 0)
979 goto badexit;
980 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r"PIPE_OPEN_MODE);
981 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w"PIPE_OPEN_MODE);
982 IoOFP(rstio) = IoIFP(rstio);
983 IoIFP(wstio) = IoOFP(wstio);
984 IoTYPE(rstio) = IoTYPE_RDONLY;
985 IoTYPE(wstio) = IoTYPE_WRONLY;
986 if (!IoIFP(rstio) || !IoOFP(wstio)) {
987 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
988 else PerlLIO_close(fd[0]);
989 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
990 else PerlLIO_close(fd[1]);
991 goto badexit;
992 }
993
994 sv_setsv(sv,&PL_sv_yes);
995 return;
996
997badexit:
998 sv_setsv(sv,&PL_sv_undef);
999 return;
1000}
1001#endif
1002
1003/* explicit renamed to avoid C++ conflict -- kja */
1004bool
1005Perl_do_close(pTHX_ GV *gv, bool not_implicit)
1006{
1007 bool retval;
1008 IO *io;
1009
1010 if (!gv)
1011 gv = PL_argvgv;
1012 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1013 if (not_implicit)
1014 SETERRNO(EBADF,SS_IVCHAN);
1015 return FALSE;
1016 }
1017 io = GvIO(gv);
1018 if (!io) { /* never opened */
1019 if (not_implicit) {
1020 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
1021 report_evil_fh(gv, io, PL_op->op_type);
1022 SETERRNO(EBADF,SS_IVCHAN);
1023 }
1024 return FALSE;
1025 }
1026 retval = io_close(io, not_implicit);
1027 if (not_implicit) {
1028 IoLINES(io) = 0;
1029 IoPAGE(io) = 0;
1030 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1031 }
1032 IoTYPE(io) = IoTYPE_CLOSED;
1033 return retval;
1034}
1035
1036bool
1037Perl_io_close(pTHX_ IO *io, bool not_implicit)
1038{
1039 bool retval = FALSE;
1040
1041 if (IoIFP(io)) {
1042 if (IoTYPE(io) == IoTYPE_PIPE) {
1043 const int status = PerlProc_pclose(IoIFP(io));
1044 if (not_implicit) {
1045 STATUS_NATIVE_SET(status);
1046 retval = (STATUS_POSIX == 0);
1047 }
1048 else {
1049 retval = (status != -1);
1050 }
1051 }
1052 else if (IoTYPE(io) == IoTYPE_STD)
1053 retval = TRUE;
1054 else {
1055 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1056 bool prev_err = PerlIO_error(IoOFP(io));
1057 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1058 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1059 }
1060 else {
1061 bool prev_err = PerlIO_error(IoIFP(io));
1062 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1063 }
1064 }
1065 IoOFP(io) = IoIFP(io) = Nullfp;
1066 }
1067 else if (not_implicit) {
1068 SETERRNO(EBADF,SS_IVCHAN);
1069 }
1070
1071 return retval;
1072}
1073
1074bool
1075Perl_do_eof(pTHX_ GV *gv)
1076{
1077 register IO *io;
1078 int ch;
1079
1080 io = GvIO(gv);
1081
1082 if (!io)
1083 return TRUE;
1084 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
1085 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
1086
1087 while (IoIFP(io)) {
1088 int saverrno;
1089
1090 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1091 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1092 return FALSE; /* this is the most usual case */
1093 }
1094
1095 saverrno = errno; /* getc and ungetc can stomp on errno */
1096 ch = PerlIO_getc(IoIFP(io));
1097 if (ch != EOF) {
1098 (void)PerlIO_ungetc(IoIFP(io),ch);
1099 errno = saverrno;
1100 return FALSE;
1101 }
1102 errno = saverrno;
1103
1104 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1105 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1106 PerlIO_set_cnt(IoIFP(io),-1);
1107 }
1108 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1109 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1110 return TRUE;
1111 }
1112 else
1113 return TRUE; /* normal fp, definitely end of file */
1114 }
1115 return TRUE;
1116}
1117
1118Off_t
1119Perl_do_tell(pTHX_ GV *gv)
1120{
1121 register IO *io = 0;
1122 register PerlIO *fp;
1123
1124 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1125#ifdef ULTRIX_STDIO_BOTCH
1126 if (PerlIO_eof(fp))
1127 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1128#endif
1129 return PerlIO_tell(fp);
1130 }
1131 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1132 report_evil_fh(gv, io, PL_op->op_type);
1133 SETERRNO(EBADF,RMS_IFI);
1134 return (Off_t)-1;
1135}
1136
1137bool
1138Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1139{
1140 register IO *io = 0;
1141 register PerlIO *fp;
1142
1143 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1144#ifdef ULTRIX_STDIO_BOTCH
1145 if (PerlIO_eof(fp))
1146 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1147#endif
1148 return PerlIO_seek(fp, pos, whence) >= 0;
1149 }
1150 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1151 report_evil_fh(gv, io, PL_op->op_type);
1152 SETERRNO(EBADF,RMS_IFI);
1153 return FALSE;
1154}
1155
1156Off_t
1157Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1158{
1159 register IO *io = 0;
1160 register PerlIO *fp;
1161
1162 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1163 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1164 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1165 report_evil_fh(gv, io, PL_op->op_type);
1166 SETERRNO(EBADF,RMS_IFI);
1167 return (Off_t)-1;
1168}
1169
1170int
1171Perl_mode_from_discipline(pTHX_ SV *discp)
1172{
1173 int mode = O_BINARY;
1174 if (discp) {
1175 STRLEN len;
1176 const char *s = SvPV_const(discp,len);
1177 while (*s) {
1178 if (*s == ':') {
1179 switch (s[1]) {
1180 case 'r':
1181 if (s[2] == 'a' && s[3] == 'w'
1182 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1183 {
1184 mode = O_BINARY;
1185 s += 4;
1186 len -= 4;
1187 break;
1188 }
1189 /* FALL THROUGH */
1190 case 'c':
1191 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1192 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1193 {
1194 mode = O_TEXT;
1195 s += 5;
1196 len -= 5;
1197 break;
1198 }
1199 /* FALL THROUGH */
1200 default:
1201 goto fail_discipline;
1202 }
1203 }
1204 else if (isSPACE(*s)) {
1205 ++s;
1206 --len;
1207 }
1208 else {
1209 const char *end;
1210fail_discipline:
1211 end = strchr(s+1, ':');
1212 if (!end)
1213 end = s+len;
1214#ifndef PERLIO_LAYERS
1215 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1216#else
1217 len -= end-s;
1218 s = end;
1219#endif
1220 }
1221 }
1222 }
1223 return mode;
1224}
1225
1226int
1227Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1228{
1229 /* The old body of this is now in non-LAYER part of perlio.c
1230 * This is a stub for any XS code which might have been calling it.
1231 */
1232 const char *name = ":raw";
1233#ifdef PERLIO_USING_CRLF
1234 if (!(mode & O_BINARY))
1235 name = ":crlf";
1236#endif
1237 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1238}
1239
1240#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1241I32
1242my_chsize(int fd, Off_t length)
1243{
1244#ifdef F_FREESP
1245 /* code courtesy of William Kucharski */
1246#define HAS_CHSIZE
1247
1248 struct flock fl;
1249 Stat_t filebuf;
1250
1251 if (PerlLIO_fstat(fd, &filebuf) < 0)
1252 return -1;
1253
1254 if (filebuf.st_size < length) {
1255
1256 /* extend file length */
1257
1258 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1259 return -1;
1260
1261 /* write a "0" byte */
1262
1263 if ((PerlLIO_write(fd, "", 1)) != 1)
1264 return -1;
1265 }
1266 else {
1267 /* truncate length */
1268
1269 fl.l_whence = 0;
1270 fl.l_len = 0;
1271 fl.l_start = length;
1272 fl.l_type = F_WRLCK; /* write lock on file space */
1273
1274 /*
1275 * This relies on the UNDOCUMENTED F_FREESP argument to
1276 * fcntl(2), which truncates the file so that it ends at the
1277 * position indicated by fl.l_start.
1278 *
1279 * Will minor miracles never cease?
1280 */
1281
1282 if (fcntl(fd, F_FREESP, &fl) < 0)
1283 return -1;
1284
1285 }
1286 return 0;
1287#else
1288 Perl_croak_nocontext("truncate not implemented");
1289#endif /* F_FREESP */
1290 return -1;
1291}
1292#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1293
1294bool
1295Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1296{
1297 register const char *tmps;
1298 STRLEN len;
1299
1300 /* assuming fp is checked earlier */
1301 if (!sv)
1302 return TRUE;
1303 if (PL_ofmt) {
1304 if (SvGMAGICAL(sv))
1305 mg_get(sv);
1306 if (SvIOK(sv) && SvIVX(sv) != 0) {
1307 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1308 return !PerlIO_error(fp);
1309 }
1310 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1311 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1312 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1313 return !PerlIO_error(fp);
1314 }
1315 }
1316 switch (SvTYPE(sv)) {
1317 case SVt_NULL:
1318 if (ckWARN(WARN_UNINITIALIZED))
1319 report_uninit();
1320 return TRUE;
1321 case SVt_IV:
1322 if (SvIOK(sv)) {
1323 if (SvGMAGICAL(sv))
1324 mg_get(sv);
1325 if (SvIsUV(sv))
1326 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1327 else
1328 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1329 return !PerlIO_error(fp);
1330 }
1331 /* FALL THROUGH */
1332 default:
1333 if (PerlIO_isutf8(fp)) {
1334 if (!SvUTF8(sv))
1335 sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv),
1336 SV_GMAGIC|SV_UTF8_NO_ENCODING);
1337 }
1338 else if (DO_UTF8(sv)) {
1339 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)
1340 && ckWARN_d(WARN_UTF8))
1341 {
1342 Perl_warner(aTHX_ packWARN(WARN_UTF8), "Wide character in print");
1343 }
1344 }
1345 tmps = SvPV_const(sv, len);
1346 break;
1347 }
1348 /* To detect whether the process is about to overstep its
1349 * filesize limit we would need getrlimit(). We could then
1350 * also transparently raise the limit with setrlimit() --
1351 * but only until the system hard limit/the filesystem limit,
1352 * at which we would get EPERM. Note that when using buffered
1353 * io the write failure can be delayed until the flush/close. --jhi */
1354 if (len && (PerlIO_write(fp,tmps,len) == 0))
1355 return FALSE;
1356 return !PerlIO_error(fp);
1357}
1358
1359I32
1360Perl_my_stat(pTHX)
1361{
1362 dSP;
1363 IO *io;
1364 GV* gv;
1365
1366 if (PL_op->op_flags & OPf_REF) {
1367 EXTEND(SP,1);
1368 gv = cGVOP_gv;
1369 do_fstat:
1370 io = GvIO(gv);
1371 if (io && IoIFP(io)) {
1372 PL_statgv = gv;
1373 sv_setpvn(PL_statname,"", 0);
1374 PL_laststype = OP_STAT;
1375 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1376 }
1377 else {
1378 if (gv == PL_defgv)
1379 return PL_laststatval;
1380 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1381 report_evil_fh(gv, io, PL_op->op_type);
1382 PL_statgv = Nullgv;
1383 sv_setpvn(PL_statname,"", 0);
1384 return (PL_laststatval = -1);
1385 }
1386 }
1387 else {
1388 SV* sv = POPs;
1389 const char *s;
1390 STRLEN len;
1391 PUTBACK;
1392 if (SvTYPE(sv) == SVt_PVGV) {
1393 gv = (GV*)sv;
1394 goto do_fstat;
1395 }
1396 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1397 gv = (GV*)SvRV(sv);
1398 goto do_fstat;
1399 }
1400
1401 s = SvPV_const(sv, len);
1402 PL_statgv = Nullgv;
1403 sv_setpvn(PL_statname, s, len);
1404 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1405 PL_laststype = OP_STAT;
1406 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1407 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1408 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1409 return PL_laststatval;
1410 }
1411}
1412
1413static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
1414
1415I32
1416Perl_my_lstat(pTHX)
1417{
1418 dSP;
1419 SV *sv;
1420 if (PL_op->op_flags & OPf_REF) {
1421 EXTEND(SP,1);
1422 if (cGVOP_gv == PL_defgv) {
1423 if (PL_laststype != OP_LSTAT)
1424 Perl_croak(aTHX_ no_prev_lstat);
1425 return PL_laststatval;
1426 }
1427 if (ckWARN(WARN_IO)) {
1428 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1429 GvENAME(cGVOP_gv));
1430 return (PL_laststatval = -1);
1431 }
1432 }
1433
1434 PL_laststype = OP_LSTAT;
1435 PL_statgv = Nullgv;
1436 sv = POPs;
1437 PUTBACK;
1438 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
1439 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1440 GvENAME((GV*) SvRV(sv)));
1441 return (PL_laststatval = -1);
1442 }
1443 /* XXX Do really need to be calling SvPV() all these times? */
1444 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1445 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1446 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
1447 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1448 return PL_laststatval;
1449}
1450
1451#ifndef OS2
1452bool
1453Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1454{
1455 return do_aexec5(really, mark, sp, 0, 0);
1456}
1457#endif
1458
1459bool
1460Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1461 int fd, int do_report)
1462{
1463#if defined(MACOS_TRADITIONAL) || defined(SYMBIAN)
1464 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1465#else
1466 if (sp > mark) {
1467 char **a;
1468 const char *tmps = Nullch;
1469 Newx(PL_Argv, sp - mark + 1, char*);
1470 a = PL_Argv;
1471
1472 while (++mark <= sp) {
1473 if (*mark)
1474 *a++ = (char*)SvPV_nolen_const(*mark);
1475 else
1476 *a++ = "";
1477 }
1478 *a = Nullch;
1479 if (really)
1480 tmps = SvPV_nolen_const(really);
1481 if ((!really && *PL_Argv[0] != '/') ||
1482 (really && *tmps != '/')) /* will execvp use PATH? */
1483 TAINT_ENV(); /* testing IFS here is overkill, probably */
1484 PERL_FPU_PRE_EXEC
1485 if (really && *tmps)
1486 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1487 else
1488 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1489 PERL_FPU_POST_EXEC
1490 if (ckWARN(WARN_EXEC))
1491 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1492 (really ? tmps : PL_Argv[0]), Strerror(errno));
1493 if (do_report) {
1494 int e = errno;
1495
1496 PerlLIO_write(fd, (void*)&e, sizeof(int));
1497 PerlLIO_close(fd);
1498 }
1499 }
1500 do_execfree();
1501#endif
1502 return FALSE;
1503}
1504
1505void
1506Perl_do_execfree(pTHX)
1507{
1508 Safefree(PL_Argv);
1509 PL_Argv = Null(char **);
1510 Safefree(PL_Cmd);
1511 PL_Cmd = Nullch;
1512}
1513
1514#if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(SYMBIAN) && !defined(MACOS_TRADITIONAL)
1515
1516bool
1517Perl_do_exec(pTHX_ char *cmd)
1518{
1519 return do_exec3(cmd,0,0);
1520}
1521
1522bool
1523Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1524{
1525 register char **a;
1526 register char *s;
1527
1528 while (*cmd && isSPACE(*cmd))
1529 cmd++;
1530
1531 /* save an extra exec if possible */
1532
1533#ifdef CSH
1534 {
1535 char flags[PERL_FLAGS_MAX];
1536 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1537 strnEQ(cmd+PL_cshlen," -c",3)) {
1538#ifdef HAS_STRLCPY
1539 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1540#else
1541 strcpy(flags,"-c");
1542#endif
1543 s = cmd+PL_cshlen+3;
1544 if (*s == 'f') {
1545 s++;
1546#ifdef HAS_STRLCPY
1547 strlcat(flags, "f", PERL_FLAGS_MAX);
1548#else
1549 strcat(flags,"f");
1550#endif
1551 }
1552 if (*s == ' ')
1553 s++;
1554 if (*s++ == '\'') {
1555 char *ncmd = s;
1556
1557 while (*s)
1558 s++;
1559 if (s[-1] == '\n')
1560 *--s = '\0';
1561 if (s[-1] == '\'') {
1562 *--s = '\0';
1563 PERL_FPU_PRE_EXEC
1564 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
1565 PERL_FPU_POST_EXEC
1566 *s = '\'';
1567 return FALSE;
1568 }
1569 }
1570 }
1571 }
1572#endif /* CSH */
1573
1574 /* see if there are shell metacharacters in it */
1575
1576 if (*cmd == '.' && isSPACE(cmd[1]))
1577 goto doshell;
1578
1579 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1580 goto doshell;
1581
1582 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1583 if (*s == '=')
1584 goto doshell;
1585
1586 for (s = cmd; *s; s++) {
1587 if (*s != ' ' && !isALPHA(*s) &&
1588 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1589 if (*s == '\n' && !s[1]) {
1590 *s = '\0';
1591 break;
1592 }
1593 /* handle the 2>&1 construct at the end */
1594 if (*s == '>' && s[1] == '&' && s[2] == '1'
1595 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1596 && (!s[3] || isSPACE(s[3])))
1597 {
1598 const char *t = s + 3;
1599
1600 while (*t && isSPACE(*t))
1601 ++t;
1602 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1603 s[-2] = '\0';
1604 break;
1605 }
1606 }
1607 doshell:
1608 PERL_FPU_PRE_EXEC
1609 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1610 PERL_FPU_POST_EXEC
1611 return FALSE;
1612 }
1613 }
1614
1615 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
1616 PL_Cmd = savepvn(cmd, s-cmd);
1617 a = PL_Argv;
1618 for (s = PL_Cmd; *s;) {
1619 while (*s && isSPACE(*s)) s++;
1620 if (*s)
1621 *(a++) = s;
1622 while (*s && !isSPACE(*s)) s++;
1623 if (*s)
1624 *s++ = '\0';
1625 }
1626 *a = Nullch;
1627 if (PL_Argv[0]) {
1628 PERL_FPU_PRE_EXEC
1629 PerlProc_execvp(PL_Argv[0],PL_Argv);
1630 PERL_FPU_POST_EXEC
1631 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1632 do_execfree();
1633 goto doshell;
1634 }
1635 {
1636 if (ckWARN(WARN_EXEC))
1637 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1638 PL_Argv[0], Strerror(errno));
1639 if (do_report) {
1640 int e = errno;
1641 PerlLIO_write(fd, (void*)&e, sizeof(int));
1642 PerlLIO_close(fd);
1643 }
1644 }
1645 }
1646 do_execfree();
1647 return FALSE;
1648}
1649
1650#endif /* OS2 || WIN32 */
1651
1652I32
1653Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1654{
1655 register I32 val;
1656 register I32 tot = 0;
1657 const char *what;
1658 const char *s;
1659 SV ** const oldmark = mark;
1660
1661#define APPLY_TAINT_PROPER() \
1662 STMT_START { \
1663 if (PL_tainted) { TAINT_PROPER(what); } \
1664 } STMT_END
1665
1666 /* This is a first heuristic; it doesn't catch tainting magic. */
1667 if (PL_tainting) {
1668 while (++mark <= sp) {
1669 if (SvTAINTED(*mark)) {
1670 TAINT;
1671 break;
1672 }
1673 }
1674 mark = oldmark;
1675 }
1676 switch (type) {
1677 case OP_CHMOD:
1678 what = "chmod";
1679 APPLY_TAINT_PROPER();
1680 if (++mark <= sp) {
1681 val = SvIVx(*mark);
1682 APPLY_TAINT_PROPER();
1683 tot = sp - mark;
1684 while (++mark <= sp) {
1685 GV* gv;
1686 if (SvTYPE(*mark) == SVt_PVGV) {
1687 gv = (GV*)*mark;
1688 do_fchmod:
1689 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1690#ifdef HAS_FCHMOD
1691 APPLY_TAINT_PROPER();
1692 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1693 tot--;
1694#else
1695 Perl_die(aTHX_ PL_no_func, "fchmod");
1696#endif
1697 }
1698 else {
1699 tot--;
1700 }
1701 }
1702 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1703 gv = (GV*)SvRV(*mark);
1704 goto do_fchmod;
1705 }
1706 else {
1707 const char *name = SvPV_nolen_const(*mark);
1708 APPLY_TAINT_PROPER();
1709 if (PerlLIO_chmod(name, val))
1710 tot--;
1711 }
1712 }
1713 }
1714 break;
1715#ifdef HAS_CHOWN
1716 case OP_CHOWN:
1717 what = "chown";
1718 APPLY_TAINT_PROPER();
1719 if (sp - mark > 2) {
1720 register I32 val2;
1721 val = SvIVx(*++mark);
1722 val2 = SvIVx(*++mark);
1723 APPLY_TAINT_PROPER();
1724 tot = sp - mark;
1725 while (++mark <= sp) {
1726 GV* gv;
1727 if (SvTYPE(*mark) == SVt_PVGV) {
1728 gv = (GV*)*mark;
1729 do_fchown:
1730 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1731#ifdef HAS_FCHOWN
1732 APPLY_TAINT_PROPER();
1733 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1734 tot--;
1735#else
1736 Perl_die(aTHX_ PL_no_func, "fchown");
1737#endif
1738 }
1739 else {
1740 tot--;
1741 }
1742 }
1743 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1744 gv = (GV*)SvRV(*mark);
1745 goto do_fchown;
1746 }
1747 else {
1748 const char *name = SvPV_nolen_const(*mark);
1749 APPLY_TAINT_PROPER();
1750 if (PerlLIO_chown(name, val, val2))
1751 tot--;
1752 }
1753 }
1754 }
1755 break;
1756#endif
1757/*
1758XXX Should we make lchown() directly available from perl?
1759For now, we'll let Configure test for HAS_LCHOWN, but do
1760nothing in the core.
1761 --AD 5/1998
1762*/
1763#ifdef HAS_KILL
1764 case OP_KILL:
1765 what = "kill";
1766 APPLY_TAINT_PROPER();
1767 if (mark == sp)
1768 break;
1769 s = SvPVx_nolen_const(*++mark);
1770 if (isALPHA(*s)) {
1771 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1772 s += 3;
1773 if ((val = whichsig((char *)s)) < 0)
1774 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1775 }
1776 else
1777 val = SvIVx(*mark);
1778 APPLY_TAINT_PROPER();
1779 tot = sp - mark;
1780#ifdef VMS
1781 /* kill() doesn't do process groups (job trees?) under VMS */
1782 if (val < 0) val = -val;
1783 if (val == SIGKILL) {
1784# include <starlet.h>
1785 /* Use native sys$delprc() to insure that target process is
1786 * deleted; supervisor-mode images don't pay attention to
1787 * CRTL's emulation of Unix-style signals and kill()
1788 */
1789 while (++mark <= sp) {
1790 I32 proc = SvIVx(*mark);
1791 register unsigned long int __vmssts;
1792 APPLY_TAINT_PROPER();
1793 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1794 tot--;
1795 switch (__vmssts) {
1796 case SS$_NONEXPR:
1797 case SS$_NOSUCHNODE:
1798 SETERRNO(ESRCH,__vmssts);
1799 break;
1800 case SS$_NOPRIV:
1801 SETERRNO(EPERM,__vmssts);
1802 break;
1803 default:
1804 SETERRNO(EVMSERR,__vmssts);
1805 }
1806 }
1807 }
1808 break;
1809 }
1810#endif
1811 if (val < 0) {
1812 val = -val;
1813 while (++mark <= sp) {
1814 I32 proc = SvIVx(*mark);
1815 APPLY_TAINT_PROPER();
1816#ifdef HAS_KILLPG
1817 if (PerlProc_killpg(proc,val)) /* BSD */
1818#else
1819 if (PerlProc_kill(-proc,val)) /* SYSV */
1820#endif
1821 tot--;
1822 }
1823 }
1824 else {
1825 while (++mark <= sp) {
1826 I32 proc = SvIVx(*mark);
1827 APPLY_TAINT_PROPER();
1828 if (PerlProc_kill(proc, val))
1829 tot--;
1830 }
1831 }
1832 break;
1833#endif
1834 case OP_UNLINK:
1835 what = "unlink";
1836 APPLY_TAINT_PROPER();
1837 tot = sp - mark;
1838 while (++mark <= sp) {
1839 s = SvPV_nolen_const(*mark);
1840 APPLY_TAINT_PROPER();
1841 if (PL_euid || PL_unsafe) {
1842 if (UNLINK((char *)s))
1843 tot--;
1844 }
1845 else { /* don't let root wipe out directories without -U */
1846 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1847 tot--;
1848 else {
1849 if (UNLINK((char*)s))
1850 tot--;
1851 }
1852 }
1853 }
1854 break;
1855#ifdef HAS_UTIME
1856 case OP_UTIME:
1857 what = "utime";
1858 APPLY_TAINT_PROPER();
1859 if (sp - mark > 2) {
1860#if defined(I_UTIME) || defined(VMS)
1861 struct utimbuf utbuf;
1862 struct utimbuf *utbufp = &utbuf;
1863#else
1864 struct {
1865 Time_t actime;
1866 Time_t modtime;
1867 } utbuf;
1868 void *utbufp = &utbuf;
1869#endif
1870
1871 SV* accessed = *++mark;
1872 SV* modified = *++mark;
1873
1874 /* Be like C, and if both times are undefined, let the C
1875 * library figure out what to do. This usually means
1876 * "current time". */
1877
1878 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1879 utbufp = NULL;
1880 else {
1881 Zero(&utbuf, sizeof utbuf, char);
1882#ifdef BIG_TIME
1883 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1884 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
1885#else
1886 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1887 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
1888#endif
1889 }
1890 APPLY_TAINT_PROPER();
1891 tot = sp - mark;
1892 while (++mark <= sp) {
1893 char *name = SvPV_nolen(*mark);
1894 APPLY_TAINT_PROPER();
1895 if (PerlLIO_utime(name, utbufp))
1896 tot--;
1897 }
1898 }
1899 else
1900 tot = 0;
1901 break;
1902#endif
1903 }
1904 return tot;
1905
1906#undef APPLY_TAINT_PROPER
1907}
1908
1909/* Do the permissions allow some operation? Assumes statcache already set. */
1910#ifndef VMS /* VMS' cando is in vms.c */
1911bool
1912Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1913/* Note: we use "effective" both for uids and gids.
1914 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1915{
1916#ifdef DOSISH
1917 /* [Comments and code from Len Reed]
1918 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1919 * to write-protected files. The execute permission bit is set
1920 * by the Miscrosoft C library stat() function for the following:
1921 * .exe files
1922 * .com files
1923 * .bat files
1924 * directories
1925 * All files and directories are readable.
1926 * Directories and special files, e.g. "CON", cannot be
1927 * write-protected.
1928 * [Comment by Tom Dinger -- a directory can have the write-protect
1929 * bit set in the file system, but DOS permits changes to
1930 * the directory anyway. In addition, all bets are off
1931 * here for networked software, such as Novell and
1932 * Sun's PC-NFS.]
1933 */
1934
1935 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1936 * too so it will actually look into the files for magic numbers
1937 */
1938 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1939
1940#else /* ! DOSISH */
1941 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1942 if (mode == S_IXUSR) {
1943 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1944 return TRUE;
1945 }
1946 else
1947 return TRUE; /* root reads and writes anything */
1948 return FALSE;
1949 }
1950 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1951 if (statbufp->st_mode & mode)
1952 return TRUE; /* ok as "user" */
1953 }
1954 else if (ingroup(statbufp->st_gid,effective)) {
1955 if (statbufp->st_mode & mode >> 3)
1956 return TRUE; /* ok as "group" */
1957 }
1958 else if (statbufp->st_mode & mode >> 6)
1959 return TRUE; /* ok as "other" */
1960 return FALSE;
1961#endif /* ! DOSISH */
1962}
1963#endif /* ! VMS */
1964
1965bool
1966Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1967{
1968#ifdef MACOS_TRADITIONAL
1969 /* This is simply not correct for AppleShare, but fix it yerself. */
1970 return TRUE;
1971#else
1972 if (testgid == (effective ? PL_egid : PL_gid))
1973 return TRUE;
1974#ifdef HAS_GETGROUPS
1975 {
1976 Groups_t *gary = NULL;
1977 I32 anum;
1978 bool rc = FALSE;
1979
1980 anum = getgroups(0, gary);
1981 Newx(gary, anum, Groups_t);
1982 anum = getgroups(anum, gary);
1983 while (--anum >= 0)
1984 if (gary[anum] == testgid) {
1985 rc = TRUE;
1986 break;
1987 }
1988
1989 Safefree(gary);
1990 return rc;
1991 }
1992#endif
1993 return FALSE;
1994#endif
1995}
1996
1997#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1998
1999I32
2000Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2001{
2002 key_t key = (key_t)SvNVx(*++mark);
2003 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
2004 const I32 flags = SvIVx(*++mark);
2005 (void)sp;
2006
2007 SETERRNO(0,0);
2008 switch (optype)
2009 {
2010#ifdef HAS_MSG
2011 case OP_MSGGET:
2012 return msgget(key, flags);
2013#endif
2014#ifdef HAS_SEM
2015 case OP_SEMGET:
2016 return semget(key, n, flags);
2017#endif
2018#ifdef HAS_SHM
2019 case OP_SHMGET:
2020 return shmget(key, n, flags);
2021#endif
2022#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2023 default:
2024 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2025#endif
2026 }
2027 return -1; /* should never happen */
2028}
2029
2030I32
2031Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2032{
2033 SV *astr;
2034 char *a;
2035 STRLEN infosize;
2036 I32 getinfo;
2037 I32 ret = -1;
2038 const I32 id = SvIVx(*++mark);
2039 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2040 const I32 cmd = SvIVx(*++mark);
2041 PERL_UNUSED_ARG(sp);
2042
2043 astr = *++mark;
2044 infosize = 0;
2045 getinfo = (cmd == IPC_STAT);
2046
2047 switch (optype)
2048 {
2049#ifdef HAS_MSG
2050 case OP_MSGCTL:
2051 if (cmd == IPC_STAT || cmd == IPC_SET)
2052 infosize = sizeof(struct msqid_ds);
2053 break;
2054#endif
2055#ifdef HAS_SHM
2056 case OP_SHMCTL:
2057 if (cmd == IPC_STAT || cmd == IPC_SET)
2058 infosize = sizeof(struct shmid_ds);
2059 break;
2060#endif
2061#ifdef HAS_SEM
2062 case OP_SEMCTL:
2063#ifdef Semctl
2064 if (cmd == IPC_STAT || cmd == IPC_SET)
2065 infosize = sizeof(struct semid_ds);
2066 else if (cmd == GETALL || cmd == SETALL)
2067 {
2068 struct semid_ds semds;
2069 union semun semun;
2070#ifdef EXTRA_F_IN_SEMUN_BUF
2071 semun.buff = &semds;
2072#else
2073 semun.buf = &semds;
2074#endif
2075 getinfo = (cmd == GETALL);
2076 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2077 return -1;
2078 infosize = semds.sem_nsems * sizeof(short);
2079 /* "short" is technically wrong but much more portable
2080 than guessing about u_?short(_t)? */
2081 }
2082#else
2083 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2084#endif
2085 break;
2086#endif
2087#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2088 default:
2089 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2090#endif
2091 }
2092
2093 if (infosize)
2094 {
2095 if (getinfo)
2096 {
2097 SvPV_force_nolen(astr);
2098 a = SvGROW(astr, infosize+1);
2099 }
2100 else
2101 {
2102 STRLEN len;
2103 a = SvPV(astr, len);
2104 if (len != infosize)
2105 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2106 PL_op_desc[optype],
2107 (unsigned long)len,
2108 (long)infosize);
2109 }
2110 }
2111 else
2112 {
2113 IV i = SvIV(astr);
2114 a = INT2PTR(char *,i); /* ouch */
2115 }
2116 SETERRNO(0,0);
2117 switch (optype)
2118 {
2119#ifdef HAS_MSG
2120 case OP_MSGCTL:
2121 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2122 break;
2123#endif
2124#ifdef HAS_SEM
2125 case OP_SEMCTL: {
2126#ifdef Semctl
2127 union semun unsemds;
2128
2129#ifdef EXTRA_F_IN_SEMUN_BUF
2130 unsemds.buff = (struct semid_ds *)a;
2131#else
2132 unsemds.buf = (struct semid_ds *)a;
2133#endif
2134 ret = Semctl(id, n, cmd, unsemds);
2135#else
2136 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2137#endif
2138 }
2139 break;
2140#endif
2141#ifdef HAS_SHM
2142 case OP_SHMCTL:
2143 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2144 break;
2145#endif
2146 }
2147 if (getinfo && ret >= 0) {
2148 SvCUR_set(astr, infosize);
2149 *SvEND(astr) = '\0';
2150 SvSETMAGIC(astr);
2151 }
2152 return ret;
2153}
2154
2155I32
2156Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2157{
2158#ifdef HAS_MSG
2159 SV *mstr;
2160 const char *mbuf;
2161 I32 msize, flags;
2162 STRLEN len;
2163 const I32 id = SvIVx(*++mark);
2164 PERL_UNUSED_ARG(sp);
2165
2166 mstr = *++mark;
2167 flags = SvIVx(*++mark);
2168 mbuf = SvPV_const(mstr, len);
2169 if ((msize = len - sizeof(long)) < 0)
2170 Perl_croak(aTHX_ "Arg too short for msgsnd");
2171 SETERRNO(0,0);
2172 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2173#else
2174 Perl_croak(aTHX_ "msgsnd not implemented");
2175#endif
2176}
2177
2178I32
2179Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2180{
2181#ifdef HAS_MSG
2182 SV *mstr;
2183 char *mbuf;
2184 long mtype;
2185 I32 msize, flags, ret;
2186 const I32 id = SvIVx(*++mark);
2187 PERL_UNUSED_ARG(sp);
2188
2189 mstr = *++mark;
2190 /* suppress warning when reading into undef var --jhi */
2191 if (! SvOK(mstr))
2192 sv_setpvn(mstr, "", 0);
2193 msize = SvIVx(*++mark);
2194 mtype = (long)SvIVx(*++mark);
2195 flags = SvIVx(*++mark);
2196 SvPV_force_nolen(mstr);
2197 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2198
2199 SETERRNO(0,0);
2200 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2201 if (ret >= 0) {
2202 SvCUR_set(mstr, sizeof(long)+ret);
2203 *SvEND(mstr) = '\0';
2204#ifndef INCOMPLETE_TAINTS
2205 /* who knows who has been playing with this message? */
2206 SvTAINTED_on(mstr);
2207#endif
2208 }
2209 return ret;
2210#else
2211 Perl_croak(aTHX_ "msgrcv not implemented");
2212#endif
2213}
2214
2215I32
2216Perl_do_semop(pTHX_ SV **mark, SV **sp)
2217{
2218#ifdef HAS_SEM
2219 SV *opstr;
2220 const char *opbuf;
2221 STRLEN opsize;
2222 const I32 id = SvIVx(*++mark);
2223 PERL_UNUSED_ARG(sp);
2224
2225 opstr = *++mark;
2226 opbuf = SvPV_const(opstr, opsize);
2227 if (opsize < 3 * SHORTSIZE
2228 || (opsize % (3 * SHORTSIZE))) {
2229 SETERRNO(EINVAL,LIB_INVARG);
2230 return -1;
2231 }
2232 SETERRNO(0,0);
2233 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2234 {
2235 const int nsops = opsize / (3 * sizeof (short));
2236 int i = nsops;
2237 short *ops = (short *) opbuf;
2238 short *o = ops;
2239 struct sembuf *temps, *t;
2240 I32 result;
2241
2242 Newx (temps, nsops, struct sembuf);
2243 t = temps;
2244 while (i--) {
2245 t->sem_num = *o++;
2246 t->sem_op = *o++;
2247 t->sem_flg = *o++;
2248 t++;
2249 }
2250 result = semop(id, temps, nsops);
2251 t = temps;
2252 o = ops;
2253 i = nsops;
2254 while (i--) {
2255 *o++ = t->sem_num;
2256 *o++ = t->sem_op;
2257 *o++ = t->sem_flg;
2258 t++;
2259 }
2260 Safefree(temps);
2261 return result;
2262 }
2263#else
2264 Perl_croak(aTHX_ "semop not implemented");
2265#endif
2266}
2267
2268I32
2269Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2270{
2271#ifdef HAS_SHM
2272 SV *mstr;
2273 char *shm;
2274 I32 mpos, msize;
2275 struct shmid_ds shmds;
2276 const I32 id = SvIVx(*++mark);
2277 PERL_UNUSED_ARG(sp);
2278
2279 mstr = *++mark;
2280 mpos = SvIVx(*++mark);
2281 msize = SvIVx(*++mark);
2282 SETERRNO(0,0);
2283 if (shmctl(id, IPC_STAT, &shmds) == -1)
2284 return -1;
2285 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2286 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2287 return -1;
2288 }
2289 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2290 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2291 return -1;
2292 if (optype == OP_SHMREAD) {
2293 const char *mbuf;
2294 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2295 if (! SvOK(mstr))
2296 sv_setpvn(mstr, "", 0);
2297 SvPV_force_nolen(mstr);
2298 mbuf = SvGROW(mstr, msize+1);
2299
2300 Copy(shm + mpos, mbuf, msize, char);
2301 SvCUR_set(mstr, msize);
2302 *SvEND(mstr) = '\0';
2303 SvSETMAGIC(mstr);
2304#ifndef INCOMPLETE_TAINTS
2305 /* who knows who has been playing with this shared memory? */
2306 SvTAINTED_on(mstr);
2307#endif
2308 }
2309 else {
2310 I32 n;
2311 STRLEN len;
2312
2313 const char *mbuf = SvPV_const(mstr, len);
2314 if ((n = len) > msize)
2315 n = msize;
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 Perl_croak(aTHX_ "shm I/O not implemented");
2323#endif
2324}
2325
2326#endif /* SYSV IPC */
2327
2328/*
2329=head1 IO Functions
2330
2331=for apidoc start_glob
2332
2333Function called by C<do_readline> to spawn a glob (or do the glob inside
2334perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2335this glob starter is only used by miniperl during the build process.
2336Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2337
2338=cut
2339*/
2340
2341PerlIO *
2342Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2343{
2344 SV * const tmpcmd = NEWSV(55, 0);
2345 PerlIO *fp;
2346 ENTER;
2347 SAVEFREESV(tmpcmd);
2348#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2349 /* since spawning off a process is a real performance hit */
2350 {
2351#include <descrip.h>
2352#include <lib$routines.h>
2353#include <nam.h>
2354#include <rmsdef.h>
2355 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2356 char vmsspec[NAM$C_MAXRSS+1];
2357 char * const rstr = rslt + sizeof(unsigned short int);
2358 char *begin, *end, *cp;
2359 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2360 PerlIO *tmpfp;
2361 STRLEN i;
2362 struct dsc$descriptor_s wilddsc
2363 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2364 struct dsc$descriptor_vs rsdsc
2365 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2366 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2367
2368 /* We could find out if there's an explicit dev/dir or version
2369 by peeking into lib$find_file's internal context at
2370 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2371 but that's unsupported, so I don't want to do it now and
2372 have it bite someone in the future. */
2373 cp = SvPV(tmpglob,i);
2374 for (; i; i--) {
2375 if (cp[i] == ';') hasver = 1;
2376 if (cp[i] == '.') {
2377 if (sts) hasver = 1;
2378 else sts = 1;
2379 }
2380 if (cp[i] == '/') {
2381 hasdir = isunix = 1;
2382 break;
2383 }
2384 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2385 hasdir = 1;
2386 break;
2387 }
2388 }
2389 if ((tmpfp = PerlIO_tmpfile()) != NULL) {
2390 Stat_t st;
2391 if (!PerlLIO_stat(SvPVX_const(tmpglob),&st) && S_ISDIR(st.st_mode))
2392 ok = ((wilddsc.dsc$a_pointer = tovmspath((char *)SvPVX_const(tmpglob),vmsspec)) != NULL);
2393 else ok = ((wilddsc.dsc$a_pointer = tovmsspec((char *)SvPVX_const(tmpglob),vmsspec)) != NULL);
2394 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2395 for (cp=wilddsc.dsc$a_pointer; ok && cp && *cp; cp++)
2396 if (*cp == '?') *cp = '%'; /* VMS style single-char wildcard */
2397 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2398 &dfltdsc,NULL,NULL,NULL))&1)) {
2399 /* with varying string, 1st word of buffer contains result length */
2400 end = rstr + *((unsigned short int*)rslt);
2401 if (!hasver) while (*end != ';' && end > rstr) end--;
2402 *(end++) = '\n'; *end = '\0';
2403 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2404 if (hasdir) {
2405 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2406 begin = rstr;
2407 }
2408 else {
2409 begin = end;
2410 while (*(--begin) != ']' && *begin != '>') ;
2411 ++begin;
2412 }
2413 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2414 }
2415 if (cxt) (void)lib$find_file_end(&cxt);
2416 if (ok && sts != RMS$_NMF &&
2417 sts != RMS$_DNF && sts != RMS_FNF) ok = 0;
2418 if (!ok) {
2419 if (!(sts & 1)) {
2420 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2421 }
2422 PerlIO_close(tmpfp);
2423 fp = NULL;
2424 }
2425 else {
2426 PerlIO_rewind(tmpfp);
2427 IoTYPE(io) = IoTYPE_RDONLY;
2428 IoIFP(io) = fp = tmpfp;
2429 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2430 }
2431 }
2432 }
2433#else /* !VMS */
2434#ifdef MACOS_TRADITIONAL
2435 sv_setpv(tmpcmd, "glob ");
2436 sv_catsv(tmpcmd, tmpglob);
2437 sv_catpv(tmpcmd, " |");
2438#else
2439#ifdef DOSISH
2440#ifdef OS2
2441 sv_setpv(tmpcmd, "for a in ");
2442 sv_catsv(tmpcmd, tmpglob);
2443 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2444#else
2445#ifdef DJGPP
2446 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2447 sv_catsv(tmpcmd, tmpglob);
2448#else
2449 sv_setpv(tmpcmd, "perlglob ");
2450 sv_catsv(tmpcmd, tmpglob);
2451 sv_catpv(tmpcmd, " |");
2452#endif /* !DJGPP */
2453#endif /* !OS2 */
2454#else /* !DOSISH */
2455#if defined(CSH)
2456 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2457 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2458 sv_catsv(tmpcmd, tmpglob);
2459 sv_catpv(tmpcmd, "' 2>/dev/null |");
2460#else
2461 sv_setpv(tmpcmd, "echo ");
2462 sv_catsv(tmpcmd, tmpglob);
2463#if 'z' - 'a' == 25
2464 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2465#else
2466 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2467#endif
2468#endif /* !CSH */
2469#endif /* !DOSISH */
2470#endif /* MACOS_TRADITIONAL */
2471 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2472 FALSE, O_RDONLY, 0, Nullfp);
2473 fp = IoIFP(io);
2474#endif /* !VMS */
2475 LEAVE;
2476 return fp;
2477}
2478
2479/*
2480 * Local variables:
2481 * c-indentation-style: bsd
2482 * c-basic-offset: 4
2483 * indent-tabs-mode: t
2484 * End:
2485 *
2486 * ex: set ts=8 sts=4 sw=4 noet:
2487 */
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