1 /*
2 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5 /* doio.c
6 *
7 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
8 * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others
9 *
10 * You may distribute under the terms of either the GNU General Public
11 * License or the Artistic License, as specified in the README file.
12 *
13 */
14
15 /*
16 * "Far below them they saw the white waters pour into a foaming bowl, and
17 * then swirl darkly about a deep oval basin in the rocks, until they found
18 * their way out again through a narrow gate, and flowed away, fuming and
19 * chattering, into calmer and more level reaches."
20 */
21
22 #include "EXTERN.h"
23 #define PERL_IN_DOIO_C
24 #include "perl.h"
25
26 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
27 #ifndef HAS_SEM
28 #include <sys/ipc.h>
29 #endif
30 #ifdef HAS_MSG
31 #include <sys/msg.h>
32 #endif
33 #ifdef HAS_SHM
34 #include <sys/shm.h>
35 # ifndef HAS_SHMAT_PROTOTYPE
36 extern Shmat_t shmat (int, char *, int);
37 # endif
38 #endif
39 #endif
40
41 #if defined(HAS_GETGROUPS) && defined(__sun)
42 #include <alloca.h>
43 #endif
44
45 #ifdef I_UTIME
46 # if defined(_MSC_VER) || defined(__MINGW32__)
47 # include <sys/utime.h>
48 # else
49 # include <utime.h>
50 # endif
51 #endif
52
53 #ifdef O_EXCL
54 # define OPEN_EXCL O_EXCL
55 #else
56 # define OPEN_EXCL 0
57 #endif
58
59 #include <signal.h>
60
61 bool
Perl_do_open(pTHX_ GV * gv,register char * name,I32 len,int as_raw,int rawmode,int rawperm,PerlIO * supplied_fp)62 Perl_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
69 bool
Perl_do_open9(pTHX_ GV * gv,register char * name,I32 len,int as_raw,int rawmode,int rawperm,PerlIO * supplied_fp,SV * svs,I32 num_svs)70 Perl_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 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
75 supplied_fp, &svs, 1);
76 }
77
78 bool
Perl_do_openn(pTHX_ GV * gv,register char * name,I32 len,int as_raw,int rawmode,int rawperm,PerlIO * supplied_fp,SV ** svp,I32 num_svs)79 Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
80 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
81 I32 num_svs)
82 {
83 register IO *io = GvIOn(gv);
84 PerlIO *saveifp = Nullfp;
85 PerlIO *saveofp = Nullfp;
86 int savefd = -1;
87 char savetype = IoTYPE_CLOSED;
88 int writing = 0;
89 PerlIO *fp;
90 int fd;
91 int result;
92 bool was_fdopen = FALSE;
93 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
94 char *type = NULL;
95 char mode[8]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
96 SV *namesv;
97
98 Zero(mode,sizeof(mode),char);
99 PL_forkprocess = 1; /* assume true if no fork */
100
101 /* Collect default raw/crlf info from the op */
102 if (PL_op && PL_op->op_type == OP_OPEN) {
103 /* set up IO layers */
104 U8 flags = PL_op->op_private;
105 in_raw = (flags & OPpOPEN_IN_RAW);
106 in_crlf = (flags & OPpOPEN_IN_CRLF);
107 out_raw = (flags & OPpOPEN_OUT_RAW);
108 out_crlf = (flags & OPpOPEN_OUT_CRLF);
109 }
110
111 /* If currently open - close before we re-open */
112 if (IoIFP(io)) {
113 fd = PerlIO_fileno(IoIFP(io));
114 if (IoTYPE(io) == IoTYPE_STD) {
115 /* This is a clone of one of STD* handles */
116 result = 0;
117 }
118 else if (fd >= 0 && fd <= PL_maxsysfd) {
119 /* This is one of the original STD* handles */
120 saveifp = IoIFP(io);
121 saveofp = IoOFP(io);
122 savetype = IoTYPE(io);
123 savefd = fd;
124 result = 0;
125 }
126 else if (IoTYPE(io) == IoTYPE_PIPE)
127 result = PerlProc_pclose(IoIFP(io));
128 else if (IoIFP(io) != IoOFP(io)) {
129 if (IoOFP(io)) {
130 result = PerlIO_close(IoOFP(io));
131 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
132 }
133 else
134 result = PerlIO_close(IoIFP(io));
135 }
136 else
137 result = PerlIO_close(IoIFP(io));
138 if (result == EOF && fd > PL_maxsysfd) {
139 /* Why is this not Perl_warn*() call ? */
140 PerlIO_printf(Perl_error_log,
141 "Warning: unable to close filehandle %s properly.\n",
142 GvENAME(gv));
143 }
144 IoOFP(io) = IoIFP(io) = Nullfp;
145 }
146
147 if (as_raw) {
148 /* sysopen style args, i.e. integer mode and permissions */
149 STRLEN ix = 0;
150 int appendtrunc =
151 0
152 #ifdef O_APPEND /* Not fully portable. */
153 |O_APPEND
154 #endif
155 #ifdef O_TRUNC /* Not fully portable. */
156 |O_TRUNC
157 #endif
158 ;
159 int modifyingmode =
160 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 /*SUPPRESS 530*/
216 for (; isSPACE(*type); type++) ;
217 while (tend > type && isSPACE(tend[-1]))
218 *--tend = '\0';
219
220 if (num_svs) {
221 /* New style explicit name, type is just mode and layer info */
222 STRLEN l = 0;
223 #ifdef USE_STDIO
224 if (SvROK(*svp) && !strchr(name,'&')) {
225 if (ckWARN(WARN_IO))
226 Perl_warner(aTHX_ packWARN(WARN_IO),
227 "Can't open a reference");
228 SETERRNO(EINVAL, LIB_INVARG);
229 goto say_false;
230 }
231 #endif /* USE_STDIO */
232 name = SvOK(*svp) ? SvPV(*svp, l) : "";
233 len = (I32)l;
234 name = savepvn(name, len);
235 SAVEFREEPV(name);
236 }
237 else {
238 name = type;
239 len = tend-type;
240 }
241 IoTYPE(io) = *type;
242 if ((*type == IoTYPE_RDWR) && /* scary */
243 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
244 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
245 TAINT_PROPER("open");
246 mode[1] = *type++;
247 writing = 1;
248 }
249
250 if (*type == IoTYPE_PIPE) {
251 if (num_svs) {
252 if (type[1] != IoTYPE_STD) {
253 unknown_open_mode:
254 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
255 }
256 type++;
257 }
258 /*SUPPRESS 530*/
259 for (type++; isSPACE(*type); type++) ;
260 if (!num_svs) {
261 name = type;
262 len = tend-type;
263 }
264 if (*name == '\0') {
265 /* command is missing 19990114 */
266 if (ckWARN(WARN_PIPE))
267 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
268 errno = EPIPE;
269 goto say_false;
270 }
271 if (strNE(name,"-") || num_svs)
272 TAINT_ENV();
273 TAINT_PROPER("piped open");
274 if (!num_svs && name[len-1] == '|') {
275 name[--len] = '\0' ;
276 if (ckWARN(WARN_PIPE))
277 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
278 }
279 mode[0] = 'w';
280 writing = 1;
281 if (out_raw)
282 strcat(mode, "b");
283 else if (out_crlf)
284 strcat(mode, "t");
285 if (num_svs > 1) {
286 fp = PerlProc_popen_list(mode, num_svs, svp);
287 }
288 else {
289 fp = PerlProc_popen(name,mode);
290 }
291 if (num_svs) {
292 if (*type) {
293 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
294 goto say_false;
295 }
296 }
297 }
298 } /* IoTYPE_PIPE */
299 else if (*type == IoTYPE_WRONLY) {
300 TAINT_PROPER("open");
301 type++;
302 if (*type == IoTYPE_WRONLY) {
303 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
304 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
305 type++;
306 }
307 else {
308 mode[0] = 'w';
309 }
310 writing = 1;
311
312 if (out_raw)
313 strcat(mode, "b");
314 else if (out_crlf)
315 strcat(mode, "t");
316
317 if (*type == '&') {
318 duplicity:
319 dodup = PERLIO_DUP_FD;
320 type++;
321 if (*type == '=') {
322 dodup = 0;
323 type++;
324 }
325 if (!num_svs && !*type && supplied_fp) {
326 /* "<+&" etc. is used by typemaps */
327 fp = supplied_fp;
328 }
329 else {
330 if (num_svs > 1) {
331 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
332 }
333 /*SUPPRESS 530*/
334 for (; isSPACE(*type); type++) ;
335 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
336 fd = SvUV(*svp);
337 num_svs = 0;
338 }
339 else if (isDIGIT(*type)) {
340 fd = atoi(type);
341 }
342 else {
343 IO* thatio;
344 if (num_svs) {
345 thatio = sv_2io(*svp);
346 }
347 else {
348 GV *thatgv;
349 thatgv = gv_fetchpv(type,FALSE,SVt_PVIO);
350 thatio = GvIO(thatgv);
351 }
352 if (!thatio) {
353 #ifdef EINVAL
354 SETERRNO(EINVAL,SS_IVCHAN);
355 #endif
356 goto say_false;
357 }
358 if ((that_fp = IoIFP(thatio))) {
359 /* Flush stdio buffer before dup. --mjd
360 * Unfortunately SEEK_CURing 0 seems to
361 * be optimized away on most platforms;
362 * only Solaris and Linux seem to flush
363 * on that. --jhi */
364 #ifdef USE_SFIO
365 /* sfio fails to clear error on next
366 sfwrite, contrary to documentation.
367 -- Nick Clark */
368 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
369 PerlIO_clearerr(that_fp);
370 #endif
371 /* On the other hand, do all platforms
372 * take gracefully to flushing a read-only
373 * filehandle? Perhaps we should do
374 * fsetpos(src)+fgetpos(dst)? --nik */
375 PerlIO_flush(that_fp);
376 fd = PerlIO_fileno(that_fp);
377 /* When dup()ing STDIN, STDOUT or STDERR
378 * explicitly set appropriate access mode */
379 if (that_fp == PerlIO_stdout()
380 || that_fp == PerlIO_stderr())
381 IoTYPE(io) = IoTYPE_WRONLY;
382 else if (that_fp == PerlIO_stdin())
383 IoTYPE(io) = IoTYPE_RDONLY;
384 /* When dup()ing a socket, say result is
385 * one as well */
386 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
387 IoTYPE(io) = IoTYPE_SOCKET;
388 }
389 else
390 fd = -1;
391 }
392 if (!num_svs)
393 type = Nullch;
394 if (that_fp) {
395 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
396 }
397 else {
398 if (dodup)
399 fd = PerlLIO_dup(fd);
400 else
401 was_fdopen = TRUE;
402 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
403 if (dodup)
404 PerlLIO_close(fd);
405 }
406 }
407 }
408 } /* & */
409 else {
410 /*SUPPRESS 530*/
411 for (; isSPACE(*type); type++) ;
412 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
413 /*SUPPRESS 530*/
414 type++;
415 fp = PerlIO_stdout();
416 IoTYPE(io) = IoTYPE_STD;
417 if (num_svs > 1) {
418 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
419 }
420 }
421 else {
422 if (!num_svs) {
423 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
424 num_svs = 1;
425 svp = &namesv;
426 type = Nullch;
427 }
428 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
429 }
430 } /* !& */
431 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
432 goto unknown_open_mode;
433 } /* IoTYPE_WRONLY */
434 else if (*type == IoTYPE_RDONLY) {
435 /*SUPPRESS 530*/
436 for (type++; isSPACE(*type); type++) ;
437 mode[0] = 'r';
438 if (in_raw)
439 strcat(mode, "b");
440 else if (in_crlf)
441 strcat(mode, "t");
442
443 if (*type == '&') {
444 goto duplicity;
445 }
446 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
447 /*SUPPRESS 530*/
448 type++;
449 fp = PerlIO_stdin();
450 IoTYPE(io) = IoTYPE_STD;
451 if (num_svs > 1) {
452 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
453 }
454 }
455 else {
456 if (!num_svs) {
457 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
458 num_svs = 1;
459 svp = &namesv;
460 type = Nullch;
461 }
462 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
463 }
464 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
465 goto unknown_open_mode;
466 } /* IoTYPE_RDONLY */
467 else if ((num_svs && /* '-|...' or '...|' */
468 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
469 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
470 if (num_svs) {
471 type += 2; /* skip over '-|' */
472 }
473 else {
474 *--tend = '\0';
475 while (tend > type && isSPACE(tend[-1]))
476 *--tend = '\0';
477 /*SUPPRESS 530*/
478 for (; isSPACE(*type); type++) ;
479 name = type;
480 len = tend-type;
481 }
482 if (*name == '\0') {
483 /* command is missing 19990114 */
484 if (ckWARN(WARN_PIPE))
485 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
486 errno = EPIPE;
487 goto say_false;
488 }
489 if (strNE(name,"-") || num_svs)
490 TAINT_ENV();
491 TAINT_PROPER("piped open");
492 mode[0] = 'r';
493 if (in_raw)
494 strcat(mode, "b");
495 else if (in_crlf)
496 strcat(mode, "t");
497 if (num_svs > 1) {
498 fp = PerlProc_popen_list(mode,num_svs,svp);
499 }
500 else {
501 fp = PerlProc_popen(name,mode);
502 }
503 IoTYPE(io) = IoTYPE_PIPE;
504 if (num_svs) {
505 for (; isSPACE(*type); type++) ;
506 if (*type) {
507 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
508 goto say_false;
509 }
510 }
511 }
512 }
513 else { /* layer(Args) */
514 if (num_svs)
515 goto unknown_open_mode;
516 name = type;
517 IoTYPE(io) = IoTYPE_RDONLY;
518 /*SUPPRESS 530*/
519 for (; isSPACE(*name); name++) ;
520 mode[0] = 'r';
521 if (in_raw)
522 strcat(mode, "b");
523 else if (in_crlf)
524 strcat(mode, "t");
525 if (strEQ(name,"-")) {
526 fp = PerlIO_stdin();
527 IoTYPE(io) = IoTYPE_STD;
528 }
529 else {
530 if (!num_svs) {
531 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
532 num_svs = 1;
533 svp = &namesv;
534 type = Nullch;
535 }
536 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
537 }
538 }
539 }
540 if (!fp) {
541 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
542 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
543 goto say_false;
544 }
545
546 if (ckWARN(WARN_IO)) {
547 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
548 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
549 Perl_warner(aTHX_ packWARN(WARN_IO),
550 "Filehandle STD%s reopened as %s only for input",
551 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
552 GvENAME(gv));
553 }
554 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
555 Perl_warner(aTHX_ packWARN(WARN_IO),
556 "Filehandle STDIN reopened as %s only for output",
557 GvENAME(gv));
558 }
559 }
560
561 fd = PerlIO_fileno(fp);
562 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
563 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
564 * type probe for socket-ness.
565 */
566 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
567 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
568 /* If PerlIO claims to have fd we had better be able to fstat() it. */
569 (void) PerlIO_close(fp);
570 goto say_false;
571 }
572 #ifndef PERL_MICRO
573 if (S_ISSOCK(PL_statbuf.st_mode))
574 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
575 #ifdef HAS_SOCKET
576 else if (
577 #ifdef S_IFMT
578 !(PL_statbuf.st_mode & S_IFMT)
579 #else
580 !PL_statbuf.st_mode
581 #endif
582 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
583 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
584 ) { /* on OS's that return 0 on fstat()ed pipe */
585 char tmpbuf[256];
586 Sock_size_t buflen = sizeof tmpbuf;
587 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
588 || errno != ENOTSOCK)
589 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
590 /* but some return 0 for streams too, sigh */
591 }
592 #endif /* HAS_SOCKET */
593 #endif /* !PERL_MICRO */
594 }
595
596 /* Eeek - FIXME !!!
597 * If this is a standard handle we discard all the layer stuff
598 * and just dup the fd into whatever was on the handle before !
599 */
600
601 if (saveifp) { /* must use old fp? */
602 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
603 then dup the new fileno down
604 */
605 if (saveofp) {
606 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
607 if (saveofp != saveifp) { /* was a socket? */
608 PerlIO_close(saveofp);
609 }
610 }
611 if (savefd != fd) {
612 /* Still a small can-of-worms here if (say) PerlIO::scalar
613 is assigned to (say) STDOUT - for now let dup2() fail
614 and provide the error
615 */
616 if (PerlLIO_dup2(fd, savefd) < 0) {
617 (void)PerlIO_close(fp);
618 goto say_false;
619 }
620 #ifdef VMS
621 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
622 char newname[FILENAME_MAX+1];
623 if (PerlIO_getname(fp, newname)) {
624 if (fd == PerlIO_fileno(PerlIO_stdout()))
625 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
626 if (fd == PerlIO_fileno(PerlIO_stderr()))
627 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
628 }
629 }
630 #endif
631
632 #if !defined(WIN32)
633 /* PL_fdpid isn't used on Windows, so avoid this useless work.
634 * XXX Probably the same for a lot of other places. */
635 {
636 Pid_t pid;
637 SV *sv;
638
639 LOCK_FDPID_MUTEX;
640 sv = *av_fetch(PL_fdpid,fd,TRUE);
641 (void)SvUPGRADE(sv, SVt_IV);
642 pid = SvIVX(sv);
643 SvIVX(sv) = 0;
644 sv = *av_fetch(PL_fdpid,savefd,TRUE);
645 (void)SvUPGRADE(sv, SVt_IV);
646 SvIVX(sv) = pid;
647 UNLOCK_FDPID_MUTEX;
648 }
649 #endif
650
651 if (was_fdopen) {
652 /* need to close fp without closing underlying fd */
653 int ofd = PerlIO_fileno(fp);
654 int dupfd = PerlLIO_dup(ofd);
655 #if defined(HAS_FCNTL) && defined(F_SETFD)
656 /* Assume if we have F_SETFD we have F_GETFD */
657 int coe = fcntl(ofd,F_GETFD);
658 #endif
659 PerlIO_close(fp);
660 PerlLIO_dup2(dupfd,ofd);
661 #if defined(HAS_FCNTL) && defined(F_SETFD)
662 /* The dup trick has lost close-on-exec on ofd */
663 fcntl(ofd,F_SETFD, coe);
664 #endif
665 PerlLIO_close(dupfd);
666 }
667 else
668 PerlIO_close(fp);
669 }
670 fp = saveifp;
671 PerlIO_clearerr(fp);
672 fd = PerlIO_fileno(fp);
673 }
674 #if defined(HAS_FCNTL) && defined(F_SETFD)
675 if (fd >= 0) {
676 int save_errno = errno;
677 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
678 errno = save_errno;
679 }
680 #endif
681 IoIFP(io) = fp;
682
683 IoFLAGS(io) &= ~IOf_NOLINE;
684 if (writing) {
685 if (IoTYPE(io) == IoTYPE_SOCKET
686 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
687 char *s = mode;
688 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
689 s++;
690 *s = 'w';
691 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
692 PerlIO_close(fp);
693 IoIFP(io) = Nullfp;
694 goto say_false;
695 }
696 }
697 else
698 IoOFP(io) = fp;
699 }
700 return TRUE;
701
702 say_false:
703 IoIFP(io) = saveifp;
704 IoOFP(io) = saveofp;
705 IoTYPE(io) = savetype;
706 return FALSE;
707 }
708
709 PerlIO *
Perl_nextargv(pTHX_ register GV * gv)710 Perl_nextargv(pTHX_ register GV *gv)
711 {
712 register SV *sv;
713 #ifndef FLEXFILENAMES
714 int filedev;
715 int fileino;
716 #endif
717 Uid_t fileuid;
718 Gid_t filegid;
719 IO *io = GvIOp(gv);
720
721 if (!PL_argvoutgv)
722 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
723 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
724 IoFLAGS(io) &= ~IOf_START;
725 if (PL_inplace) {
726 if (!PL_argvout_stack)
727 PL_argvout_stack = newAV();
728 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
729 }
730 }
731 if (PL_filemode & (S_ISUID|S_ISGID)) {
732 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
733 #ifdef HAS_FCHMOD
734 if (PL_lastfd != -1)
735 (void)fchmod(PL_lastfd,PL_filemode);
736 #else
737 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
738 #endif
739 }
740 PL_lastfd = -1;
741 PL_filemode = 0;
742 if (!GvAV(gv))
743 return Nullfp;
744 while (av_len(GvAV(gv)) >= 0) {
745 STRLEN oldlen;
746 sv = av_shift(GvAV(gv));
747 SAVEFREESV(sv);
748 sv_setsv(GvSV(gv),sv);
749 SvSETMAGIC(GvSV(gv));
750 PL_oldname = SvPVx(GvSV(gv), oldlen);
751 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
752 if (PL_inplace) {
753 TAINT_PROPER("inplace open");
754 if (oldlen == 1 && *PL_oldname == '-') {
755 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
756 return IoIFP(GvIOp(gv));
757 }
758 #ifndef FLEXFILENAMES
759 filedev = PL_statbuf.st_dev;
760 fileino = PL_statbuf.st_ino;
761 #endif
762 PL_filemode = PL_statbuf.st_mode;
763 fileuid = PL_statbuf.st_uid;
764 filegid = PL_statbuf.st_gid;
765 if (!S_ISREG(PL_filemode)) {
766 if (ckWARN_d(WARN_INPLACE))
767 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
768 "Can't do inplace edit: %s is not a regular file",
769 PL_oldname );
770 do_close(gv,FALSE);
771 continue;
772 }
773 if (*PL_inplace) {
774 char *star = strchr(PL_inplace, '*');
775 if (star) {
776 char *begin = PL_inplace;
777 sv_setpvn(sv, "", 0);
778 do {
779 sv_catpvn(sv, begin, star - begin);
780 sv_catpvn(sv, PL_oldname, oldlen);
781 begin = ++star;
782 } while ((star = strchr(begin, '*')));
783 if (*begin)
784 sv_catpv(sv,begin);
785 }
786 else {
787 sv_catpv(sv,PL_inplace);
788 }
789 #ifndef FLEXFILENAMES
790 if ((PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
791 && PL_statbuf.st_dev == filedev
792 && PL_statbuf.st_ino == fileino)
793 #ifdef DJGPP
794 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
795 #endif
796 )
797 {
798 if (ckWARN_d(WARN_INPLACE))
799 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
800 "Can't do inplace edit: %"SVf" would not be unique",
801 sv);
802 do_close(gv,FALSE);
803 continue;
804 }
805 #endif
806 #ifdef HAS_RENAME
807 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
808 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
809 if (ckWARN_d(WARN_INPLACE))
810 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
811 "Can't rename %s to %"SVf": %s, skipping file",
812 PL_oldname, sv, Strerror(errno) );
813 do_close(gv,FALSE);
814 continue;
815 }
816 #else
817 do_close(gv,FALSE);
818 (void)PerlLIO_unlink(SvPVX(sv));
819 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
820 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
821 #endif /* DOSISH */
822 #else
823 (void)UNLINK(SvPVX(sv));
824 if (link(PL_oldname,SvPVX(sv)) < 0) {
825 if (ckWARN_d(WARN_INPLACE))
826 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
827 "Can't rename %s to %"SVf": %s, skipping file",
828 PL_oldname, sv, Strerror(errno) );
829 do_close(gv,FALSE);
830 continue;
831 }
832 (void)UNLINK(PL_oldname);
833 #endif
834 }
835 else {
836 #if !defined(DOSISH) && !defined(AMIGAOS)
837 # ifndef VMS /* Don't delete; use automatic file versioning */
838 if (UNLINK(PL_oldname) < 0) {
839 if (ckWARN_d(WARN_INPLACE))
840 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
841 "Can't remove %s: %s, skipping file",
842 PL_oldname, Strerror(errno) );
843 do_close(gv,FALSE);
844 continue;
845 }
846 # endif
847 #else
848 Perl_croak(aTHX_ "Can't do inplace edit without backup");
849 #endif
850 }
851
852 sv_setpvn(sv,">",!PL_inplace);
853 sv_catpvn(sv,PL_oldname,oldlen);
854 SETERRNO(0,0); /* in case sprintf set errno */
855 #ifdef VMS
856 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
857 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
858 #else
859 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
860 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
861 #endif
862 {
863 if (ckWARN_d(WARN_INPLACE))
864 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
865 PL_oldname, Strerror(errno) );
866 do_close(gv,FALSE);
867 continue;
868 }
869 setdefout(PL_argvoutgv);
870 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
871 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
872 #ifdef HAS_FCHMOD
873 (void)fchmod(PL_lastfd,PL_filemode);
874 #else
875 # if !(defined(WIN32) && defined(__BORLANDC__))
876 /* Borland runtime creates a readonly file! */
877 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
878 # endif
879 #endif
880 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
881 #ifdef HAS_FCHOWN
882 (void)fchown(PL_lastfd,fileuid,filegid);
883 #else
884 #ifdef HAS_CHOWN
885 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
886 #endif
887 #endif
888 }
889 }
890 return IoIFP(GvIOp(gv));
891 }
892 else {
893 if (ckWARN_d(WARN_INPLACE)) {
894 int eno = errno;
895 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
896 && !S_ISREG(PL_statbuf.st_mode))
897 {
898 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
899 "Can't do inplace edit: %s is not a regular file",
900 PL_oldname);
901 }
902 else
903 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
904 PL_oldname, Strerror(eno));
905 }
906 }
907 }
908 if (io && (IoFLAGS(io) & IOf_ARGV))
909 IoFLAGS(io) |= IOf_START;
910 if (PL_inplace) {
911 (void)do_close(PL_argvoutgv,FALSE);
912 if (io && (IoFLAGS(io) & IOf_ARGV)
913 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
914 {
915 GV *oldout = (GV*)av_pop(PL_argvout_stack);
916 setdefout(oldout);
917 SvREFCNT_dec(oldout);
918 return Nullfp;
919 }
920 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
921 }
922 return Nullfp;
923 }
924
925 #ifdef HAS_PIPE
926 void
Perl_do_pipe(pTHX_ SV * sv,GV * rgv,GV * wgv)927 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
928 {
929 register IO *rstio;
930 register IO *wstio;
931 int fd[2];
932
933 if (!rgv)
934 goto badexit;
935 if (!wgv)
936 goto badexit;
937
938 rstio = GvIOn(rgv);
939 wstio = GvIOn(wgv);
940
941 if (IoIFP(rstio))
942 do_close(rgv,FALSE);
943 if (IoIFP(wstio))
944 do_close(wgv,FALSE);
945
946 if (PerlProc_pipe(fd) < 0)
947 goto badexit;
948 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r"PIPE_OPEN_MODE);
949 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w"PIPE_OPEN_MODE);
950 IoOFP(rstio) = IoIFP(rstio);
951 IoIFP(wstio) = IoOFP(wstio);
952 IoTYPE(rstio) = IoTYPE_RDONLY;
953 IoTYPE(wstio) = IoTYPE_WRONLY;
954 if (!IoIFP(rstio) || !IoOFP(wstio)) {
955 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
956 else PerlLIO_close(fd[0]);
957 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
958 else PerlLIO_close(fd[1]);
959 goto badexit;
960 }
961
962 sv_setsv(sv,&PL_sv_yes);
963 return;
964
965 badexit:
966 sv_setsv(sv,&PL_sv_undef);
967 return;
968 }
969 #endif
970
971 /* explicit renamed to avoid C++ conflict -- kja */
972 bool
Perl_do_close(pTHX_ GV * gv,bool not_implicit)973 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
974 {
975 bool retval;
976 IO *io;
977
978 if (!gv)
979 gv = PL_argvgv;
980 if (!gv || SvTYPE(gv) != SVt_PVGV) {
981 if (not_implicit)
982 SETERRNO(EBADF,SS_IVCHAN);
983 return FALSE;
984 }
985 io = GvIO(gv);
986 if (!io) { /* never opened */
987 if (not_implicit) {
988 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
989 report_evil_fh(gv, io, PL_op->op_type);
990 SETERRNO(EBADF,SS_IVCHAN);
991 }
992 return FALSE;
993 }
994 retval = io_close(io, not_implicit);
995 if (not_implicit) {
996 IoLINES(io) = 0;
997 IoPAGE(io) = 0;
998 IoLINES_LEFT(io) = IoPAGE_LEN(io);
999 }
1000 IoTYPE(io) = IoTYPE_CLOSED;
1001 return retval;
1002 }
1003
1004 bool
Perl_io_close(pTHX_ IO * io,bool not_implicit)1005 Perl_io_close(pTHX_ IO *io, bool not_implicit)
1006 {
1007 bool retval = FALSE;
1008 int status;
1009
1010 if (IoIFP(io)) {
1011 if (IoTYPE(io) == IoTYPE_PIPE) {
1012 status = PerlProc_pclose(IoIFP(io));
1013 if (not_implicit) {
1014 STATUS_NATIVE_SET(status);
1015 retval = (STATUS_POSIX == 0);
1016 }
1017 else {
1018 retval = (status != -1);
1019 }
1020 }
1021 else if (IoTYPE(io) == IoTYPE_STD)
1022 retval = TRUE;
1023 else {
1024 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1025 retval = (PerlIO_close(IoOFP(io)) != EOF);
1026 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1027 }
1028 else
1029 retval = (PerlIO_close(IoIFP(io)) != EOF);
1030 }
1031 IoOFP(io) = IoIFP(io) = Nullfp;
1032 }
1033 else if (not_implicit) {
1034 SETERRNO(EBADF,SS_IVCHAN);
1035 }
1036
1037 return retval;
1038 }
1039
1040 bool
Perl_do_eof(pTHX_ GV * gv)1041 Perl_do_eof(pTHX_ GV *gv)
1042 {
1043 register IO *io;
1044 int ch;
1045
1046 io = GvIO(gv);
1047
1048 if (!io)
1049 return TRUE;
1050 else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY))
1051 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
1052
1053 while (IoIFP(io)) {
1054 int saverrno;
1055
1056 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1057 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1058 return FALSE; /* this is the most usual case */
1059 }
1060
1061 saverrno = errno; /* getc and ungetc can stomp on errno */
1062 ch = PerlIO_getc(IoIFP(io));
1063 if (ch != EOF) {
1064 (void)PerlIO_ungetc(IoIFP(io),ch);
1065 errno = saverrno;
1066 return FALSE;
1067 }
1068 errno = saverrno;
1069
1070 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1071 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1072 PerlIO_set_cnt(IoIFP(io),-1);
1073 }
1074 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1075 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1076 return TRUE;
1077 }
1078 else
1079 return TRUE; /* normal fp, definitely end of file */
1080 }
1081 return TRUE;
1082 }
1083
1084 Off_t
Perl_do_tell(pTHX_ GV * gv)1085 Perl_do_tell(pTHX_ GV *gv)
1086 {
1087 register IO *io = 0;
1088 register PerlIO *fp;
1089
1090 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1091 #ifdef ULTRIX_STDIO_BOTCH
1092 if (PerlIO_eof(fp))
1093 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1094 #endif
1095 return PerlIO_tell(fp);
1096 }
1097 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1098 report_evil_fh(gv, io, PL_op->op_type);
1099 SETERRNO(EBADF,RMS_IFI);
1100 return (Off_t)-1;
1101 }
1102
1103 bool
Perl_do_seek(pTHX_ GV * gv,Off_t pos,int whence)1104 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1105 {
1106 register IO *io = 0;
1107 register PerlIO *fp;
1108
1109 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1110 #ifdef ULTRIX_STDIO_BOTCH
1111 if (PerlIO_eof(fp))
1112 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1113 #endif
1114 return PerlIO_seek(fp, pos, whence) >= 0;
1115 }
1116 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1117 report_evil_fh(gv, io, PL_op->op_type);
1118 SETERRNO(EBADF,RMS_IFI);
1119 return FALSE;
1120 }
1121
1122 Off_t
Perl_do_sysseek(pTHX_ GV * gv,Off_t pos,int whence)1123 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1124 {
1125 register IO *io = 0;
1126 register PerlIO *fp;
1127
1128 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1129 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1130 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1131 report_evil_fh(gv, io, PL_op->op_type);
1132 SETERRNO(EBADF,RMS_IFI);
1133 return (Off_t)-1;
1134 }
1135
1136 int
Perl_mode_from_discipline(pTHX_ SV * discp)1137 Perl_mode_from_discipline(pTHX_ SV *discp)
1138 {
1139 int mode = O_BINARY;
1140 if (discp) {
1141 STRLEN len;
1142 char *s = SvPV(discp,len);
1143 while (*s) {
1144 if (*s == ':') {
1145 switch (s[1]) {
1146 case 'r':
1147 if (len > 3 && strnEQ(s+1, "raw", 3)
1148 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1149 {
1150 mode = O_BINARY;
1151 s += 4;
1152 len -= 4;
1153 break;
1154 }
1155 /* FALL THROUGH */
1156 case 'c':
1157 if (len > 4 && strnEQ(s+1, "crlf", 4)
1158 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1159 {
1160 mode = O_TEXT;
1161 s += 5;
1162 len -= 5;
1163 break;
1164 }
1165 /* FALL THROUGH */
1166 default:
1167 goto fail_discipline;
1168 }
1169 }
1170 else if (isSPACE(*s)) {
1171 ++s;
1172 --len;
1173 }
1174 else {
1175 char *end;
1176 fail_discipline:
1177 end = strchr(s+1, ':');
1178 if (!end)
1179 end = s+len;
1180 #ifndef PERLIO_LAYERS
1181 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1182 #else
1183 s = end;
1184 #endif
1185 }
1186 }
1187 }
1188 return mode;
1189 }
1190
1191 int
Perl_do_binmode(pTHX_ PerlIO * fp,int iotype,int mode)1192 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1193 {
1194 /* The old body of this is now in non-LAYER part of perlio.c
1195 * This is a stub for any XS code which might have been calling it.
1196 */
1197 char *name = ":raw";
1198 #ifdef PERLIO_USING_CRLF
1199 if (!(mode & O_BINARY))
1200 name = ":crlf";
1201 #endif
1202 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1203 }
1204
1205 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
1206 /* code courtesy of William Kucharski */
1207 #define HAS_CHSIZE
1208
my_chsize(fd,length)1209 I32 my_chsize(fd, length)
1210 I32 fd; /* file descriptor */
1211 Off_t length; /* length to set file to */
1212 {
1213 struct flock fl;
1214 Stat_t filebuf;
1215
1216 if (PerlLIO_fstat(fd, &filebuf) < 0)
1217 return -1;
1218
1219 if (filebuf.st_size < length) {
1220
1221 /* extend file length */
1222
1223 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1224 return -1;
1225
1226 /* write a "0" byte */
1227
1228 if ((PerlLIO_write(fd, "", 1)) != 1)
1229 return -1;
1230 }
1231 else {
1232 /* truncate length */
1233
1234 fl.l_whence = 0;
1235 fl.l_len = 0;
1236 fl.l_start = length;
1237 fl.l_type = F_WRLCK; /* write lock on file space */
1238
1239 /*
1240 * This relies on the UNDOCUMENTED F_FREESP argument to
1241 * fcntl(2), which truncates the file so that it ends at the
1242 * position indicated by fl.l_start.
1243 *
1244 * Will minor miracles never cease?
1245 */
1246
1247 if (fcntl(fd, F_FREESP, &fl) < 0)
1248 return -1;
1249
1250 }
1251
1252 return 0;
1253 }
1254 #endif /* F_FREESP */
1255
1256 bool
Perl_do_print(pTHX_ register SV * sv,PerlIO * fp)1257 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1258 {
1259 register char *tmps;
1260 STRLEN len;
1261
1262 /* assuming fp is checked earlier */
1263 if (!sv)
1264 return TRUE;
1265 if (PL_ofmt) {
1266 if (SvGMAGICAL(sv))
1267 mg_get(sv);
1268 if (SvIOK(sv) && SvIVX(sv) != 0) {
1269 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1270 return !PerlIO_error(fp);
1271 }
1272 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1273 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1274 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1275 return !PerlIO_error(fp);
1276 }
1277 }
1278 switch (SvTYPE(sv)) {
1279 case SVt_NULL:
1280 if (ckWARN(WARN_UNINITIALIZED))
1281 report_uninit();
1282 return TRUE;
1283 case SVt_IV:
1284 if (SvIOK(sv)) {
1285 if (SvGMAGICAL(sv))
1286 mg_get(sv);
1287 if (SvIsUV(sv))
1288 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1289 else
1290 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1291 return !PerlIO_error(fp);
1292 }
1293 /* FALL THROUGH */
1294 default:
1295 if (PerlIO_isutf8(fp)) {
1296 if (!SvUTF8(sv))
1297 sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv),
1298 SV_GMAGIC|SV_UTF8_NO_ENCODING);
1299 }
1300 else if (DO_UTF8(sv)) {
1301 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)
1302 && ckWARN_d(WARN_UTF8))
1303 {
1304 Perl_warner(aTHX_ packWARN(WARN_UTF8), "Wide character in print");
1305 }
1306 }
1307 tmps = SvPV(sv, len);
1308 break;
1309 }
1310 /* To detect whether the process is about to overstep its
1311 * filesize limit we would need getrlimit(). We could then
1312 * also transparently raise the limit with setrlimit() --
1313 * but only until the system hard limit/the filesystem limit,
1314 * at which we would get EPERM. Note that when using buffered
1315 * io the write failure can be delayed until the flush/close. --jhi */
1316 if (len && (PerlIO_write(fp,tmps,len) == 0))
1317 return FALSE;
1318 return !PerlIO_error(fp);
1319 }
1320
1321 I32
Perl_my_stat(pTHX)1322 Perl_my_stat(pTHX)
1323 {
1324 dSP;
1325 IO *io;
1326 GV* gv;
1327
1328 if (PL_op->op_flags & OPf_REF) {
1329 EXTEND(SP,1);
1330 gv = cGVOP_gv;
1331 do_fstat:
1332 io = GvIO(gv);
1333 if (io && IoIFP(io)) {
1334 PL_statgv = gv;
1335 sv_setpv(PL_statname,"");
1336 PL_laststype = OP_STAT;
1337 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1338 }
1339 else {
1340 if (gv == PL_defgv)
1341 return PL_laststatval;
1342 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1343 report_evil_fh(gv, io, PL_op->op_type);
1344 PL_statgv = Nullgv;
1345 sv_setpv(PL_statname,"");
1346 return (PL_laststatval = -1);
1347 }
1348 }
1349 else {
1350 SV* sv = POPs;
1351 char *s;
1352 STRLEN len;
1353 PUTBACK;
1354 if (SvTYPE(sv) == SVt_PVGV) {
1355 gv = (GV*)sv;
1356 goto do_fstat;
1357 }
1358 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1359 gv = (GV*)SvRV(sv);
1360 goto do_fstat;
1361 }
1362
1363 s = SvPV(sv, len);
1364 PL_statgv = Nullgv;
1365 sv_setpvn(PL_statname, s, len);
1366 s = SvPVX(PL_statname); /* s now NUL-terminated */
1367 PL_laststype = OP_STAT;
1368 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1369 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1370 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1371 return PL_laststatval;
1372 }
1373 }
1374
1375 I32
Perl_my_lstat(pTHX)1376 Perl_my_lstat(pTHX)
1377 {
1378 dSP;
1379 SV *sv;
1380 STRLEN n_a;
1381 if (PL_op->op_flags & OPf_REF) {
1382 EXTEND(SP,1);
1383 if (cGVOP_gv == PL_defgv) {
1384 if (PL_laststype != OP_LSTAT)
1385 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1386 return PL_laststatval;
1387 }
1388 if (ckWARN(WARN_IO)) {
1389 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1390 GvENAME(cGVOP_gv));
1391 return (PL_laststatval = -1);
1392 }
1393 }
1394
1395 PL_laststype = OP_LSTAT;
1396 PL_statgv = Nullgv;
1397 sv = POPs;
1398 PUTBACK;
1399 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
1400 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1401 GvENAME((GV*) SvRV(sv)));
1402 return (PL_laststatval = -1);
1403 }
1404 sv_setpv(PL_statname,SvPV(sv, n_a));
1405 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1406 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1407 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1408 return PL_laststatval;
1409 }
1410
1411 #ifndef OS2
1412 bool
Perl_do_aexec(pTHX_ SV * really,register SV ** mark,register SV ** sp)1413 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1414 {
1415 return do_aexec5(really, mark, sp, 0, 0);
1416 }
1417 #endif
1418
1419 bool
Perl_do_aexec5(pTHX_ SV * really,register SV ** mark,register SV ** sp,int fd,int do_report)1420 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1421 int fd, int do_report)
1422 {
1423 #ifdef MACOS_TRADITIONAL
1424 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1425 #else
1426 register char **a;
1427 char *tmps = Nullch;
1428 STRLEN n_a;
1429
1430 if (sp > mark) {
1431 New(401,PL_Argv, sp - mark + 1, char*);
1432 a = PL_Argv;
1433 while (++mark <= sp) {
1434 if (*mark)
1435 *a++ = SvPVx(*mark, n_a);
1436 else
1437 *a++ = "";
1438 }
1439 *a = Nullch;
1440 if (really)
1441 tmps = SvPV(really, n_a);
1442 if ((!really && *PL_Argv[0] != '/') ||
1443 (really && *tmps != '/')) /* will execvp use PATH? */
1444 TAINT_ENV(); /* testing IFS here is overkill, probably */
1445 PERL_FPU_PRE_EXEC
1446 if (really && *tmps)
1447 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1448 else
1449 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1450 PERL_FPU_POST_EXEC
1451 if (ckWARN(WARN_EXEC))
1452 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1453 (really ? tmps : PL_Argv[0]), Strerror(errno));
1454 if (do_report) {
1455 int e = errno;
1456
1457 PerlLIO_write(fd, (void*)&e, sizeof(int));
1458 PerlLIO_close(fd);
1459 }
1460 }
1461 do_execfree();
1462 #endif
1463 return FALSE;
1464 }
1465
1466 void
Perl_do_execfree(pTHX)1467 Perl_do_execfree(pTHX)
1468 {
1469 if (PL_Argv) {
1470 Safefree(PL_Argv);
1471 PL_Argv = Null(char **);
1472 }
1473 if (PL_Cmd) {
1474 Safefree(PL_Cmd);
1475 PL_Cmd = Nullch;
1476 }
1477 }
1478
1479 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1480
1481 bool
Perl_do_exec(pTHX_ char * cmd)1482 Perl_do_exec(pTHX_ char *cmd)
1483 {
1484 return do_exec3(cmd,0,0);
1485 }
1486
1487 bool
Perl_do_exec3(pTHX_ char * cmd,int fd,int do_report)1488 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1489 {
1490 register char **a;
1491 register char *s;
1492
1493 while (*cmd && isSPACE(*cmd))
1494 cmd++;
1495
1496 /* save an extra exec if possible */
1497
1498 #ifdef CSH
1499 {
1500 char flags[10];
1501 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1502 strnEQ(cmd+PL_cshlen," -c",3)) {
1503 strcpy(flags,"-c");
1504 s = cmd+PL_cshlen+3;
1505 if (*s == 'f') {
1506 s++;
1507 strcat(flags,"f");
1508 }
1509 if (*s == ' ')
1510 s++;
1511 if (*s++ == '\'') {
1512 char *ncmd = s;
1513
1514 while (*s)
1515 s++;
1516 if (s[-1] == '\n')
1517 *--s = '\0';
1518 if (s[-1] == '\'') {
1519 *--s = '\0';
1520 PERL_FPU_PRE_EXEC
1521 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
1522 PERL_FPU_POST_EXEC
1523 *s = '\'';
1524 return FALSE;
1525 }
1526 }
1527 }
1528 }
1529 #endif /* CSH */
1530
1531 /* see if there are shell metacharacters in it */
1532
1533 if (*cmd == '.' && isSPACE(cmd[1]))
1534 goto doshell;
1535
1536 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1537 goto doshell;
1538
1539 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1540 if (*s == '=')
1541 goto doshell;
1542
1543 for (s = cmd; *s; s++) {
1544 if (*s != ' ' && !isALPHA(*s) &&
1545 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1546 if (*s == '\n' && !s[1]) {
1547 *s = '\0';
1548 break;
1549 }
1550 /* handle the 2>&1 construct at the end */
1551 if (*s == '>' && s[1] == '&' && s[2] == '1'
1552 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1553 && (!s[3] || isSPACE(s[3])))
1554 {
1555 char *t = s + 3;
1556
1557 while (*t && isSPACE(*t))
1558 ++t;
1559 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1560 s[-2] = '\0';
1561 break;
1562 }
1563 }
1564 doshell:
1565 PERL_FPU_PRE_EXEC
1566 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1567 PERL_FPU_POST_EXEC
1568 return FALSE;
1569 }
1570 }
1571
1572 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1573 PL_Cmd = savepvn(cmd, s-cmd);
1574 a = PL_Argv;
1575 for (s = PL_Cmd; *s;) {
1576 while (*s && isSPACE(*s)) s++;
1577 if (*s)
1578 *(a++) = s;
1579 while (*s && !isSPACE(*s)) s++;
1580 if (*s)
1581 *s++ = '\0';
1582 }
1583 *a = Nullch;
1584 if (PL_Argv[0]) {
1585 PERL_FPU_PRE_EXEC
1586 PerlProc_execvp(PL_Argv[0],PL_Argv);
1587 PERL_FPU_POST_EXEC
1588 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1589 do_execfree();
1590 goto doshell;
1591 }
1592 {
1593 int e = errno;
1594
1595 if (ckWARN(WARN_EXEC))
1596 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1597 PL_Argv[0], Strerror(errno));
1598 if (do_report) {
1599 PerlLIO_write(fd, (void*)&e, sizeof(int));
1600 PerlLIO_close(fd);
1601 }
1602 }
1603 }
1604 do_execfree();
1605 return FALSE;
1606 }
1607
1608 #endif /* OS2 || WIN32 */
1609
1610 I32
Perl_apply(pTHX_ I32 type,register SV ** mark,register SV ** sp)1611 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1612 {
1613 register I32 val;
1614 register I32 val2;
1615 register I32 tot = 0;
1616 char *what;
1617 char *s;
1618 SV **oldmark = mark;
1619 STRLEN n_a;
1620
1621 #define APPLY_TAINT_PROPER() \
1622 STMT_START { \
1623 if (PL_tainted) { TAINT_PROPER(what); } \
1624 } STMT_END
1625
1626 /* This is a first heuristic; it doesn't catch tainting magic. */
1627 if (PL_tainting) {
1628 while (++mark <= sp) {
1629 if (SvTAINTED(*mark)) {
1630 TAINT;
1631 break;
1632 }
1633 }
1634 mark = oldmark;
1635 }
1636 switch (type) {
1637 case OP_CHMOD:
1638 what = "chmod";
1639 APPLY_TAINT_PROPER();
1640 if (++mark <= sp) {
1641 val = SvIVx(*mark);
1642 APPLY_TAINT_PROPER();
1643 tot = sp - mark;
1644 while (++mark <= sp) {
1645 char *name = SvPVx(*mark, n_a);
1646 APPLY_TAINT_PROPER();
1647 if (PerlLIO_chmod(name, val))
1648 tot--;
1649 }
1650 }
1651 break;
1652 #ifdef HAS_CHOWN
1653 case OP_CHOWN:
1654 what = "chown";
1655 APPLY_TAINT_PROPER();
1656 if (sp - mark > 2) {
1657 val = SvIVx(*++mark);
1658 val2 = SvIVx(*++mark);
1659 APPLY_TAINT_PROPER();
1660 tot = sp - mark;
1661 while (++mark <= sp) {
1662 char *name = SvPVx(*mark, n_a);
1663 APPLY_TAINT_PROPER();
1664 if (PerlLIO_chown(name, val, val2))
1665 tot--;
1666 }
1667 }
1668 break;
1669 #endif
1670 /*
1671 XXX Should we make lchown() directly available from perl?
1672 For now, we'll let Configure test for HAS_LCHOWN, but do
1673 nothing in the core.
1674 --AD 5/1998
1675 */
1676 #ifdef HAS_KILL
1677 case OP_KILL:
1678 what = "kill";
1679 APPLY_TAINT_PROPER();
1680 if (mark == sp)
1681 break;
1682 s = SvPVx(*++mark, n_a);
1683 if (isALPHA(*s)) {
1684 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1685 s += 3;
1686 if ((val = whichsig(s)) < 0)
1687 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1688 }
1689 else
1690 val = SvIVx(*mark);
1691 APPLY_TAINT_PROPER();
1692 tot = sp - mark;
1693 #ifdef VMS
1694 /* kill() doesn't do process groups (job trees?) under VMS */
1695 if (val < 0) val = -val;
1696 if (val == SIGKILL) {
1697 # include <starlet.h>
1698 /* Use native sys$delprc() to insure that target process is
1699 * deleted; supervisor-mode images don't pay attention to
1700 * CRTL's emulation of Unix-style signals and kill()
1701 */
1702 while (++mark <= sp) {
1703 I32 proc = SvIVx(*mark);
1704 register unsigned long int __vmssts;
1705 APPLY_TAINT_PROPER();
1706 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1707 tot--;
1708 switch (__vmssts) {
1709 case SS$_NONEXPR:
1710 case SS$_NOSUCHNODE:
1711 SETERRNO(ESRCH,__vmssts);
1712 break;
1713 case SS$_NOPRIV:
1714 SETERRNO(EPERM,__vmssts);
1715 break;
1716 default:
1717 SETERRNO(EVMSERR,__vmssts);
1718 }
1719 }
1720 }
1721 break;
1722 }
1723 #endif
1724 if (val < 0) {
1725 val = -val;
1726 while (++mark <= sp) {
1727 I32 proc = SvIVx(*mark);
1728 APPLY_TAINT_PROPER();
1729 #ifdef HAS_KILLPG
1730 if (PerlProc_killpg(proc,val)) /* BSD */
1731 #else
1732 if (PerlProc_kill(-proc,val)) /* SYSV */
1733 #endif
1734 tot--;
1735 }
1736 }
1737 else {
1738 while (++mark <= sp) {
1739 I32 proc = SvIVx(*mark);
1740 APPLY_TAINT_PROPER();
1741 if (PerlProc_kill(proc, val))
1742 tot--;
1743 }
1744 }
1745 break;
1746 #endif
1747 case OP_UNLINK:
1748 what = "unlink";
1749 APPLY_TAINT_PROPER();
1750 tot = sp - mark;
1751 while (++mark <= sp) {
1752 s = SvPVx(*mark, n_a);
1753 APPLY_TAINT_PROPER();
1754 if (PL_euid || PL_unsafe) {
1755 if (UNLINK(s))
1756 tot--;
1757 }
1758 else { /* don't let root wipe out directories without -U */
1759 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1760 tot--;
1761 else {
1762 if (UNLINK(s))
1763 tot--;
1764 }
1765 }
1766 }
1767 break;
1768 #ifdef HAS_UTIME
1769 case OP_UTIME:
1770 what = "utime";
1771 APPLY_TAINT_PROPER();
1772 if (sp - mark > 2) {
1773 #if defined(I_UTIME) || defined(VMS)
1774 struct utimbuf utbuf;
1775 #else
1776 struct {
1777 Time_t actime;
1778 Time_t modtime;
1779 } utbuf;
1780 #endif
1781
1782 SV* accessed = *++mark;
1783 SV* modified = *++mark;
1784 void * utbufp = &utbuf;
1785
1786 /* Be like C, and if both times are undefined, let the C
1787 * library figure out what to do. This usually means
1788 * "current time". */
1789
1790 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1791 utbufp = NULL;
1792 else {
1793 Zero(&utbuf, sizeof utbuf, char);
1794 #ifdef BIG_TIME
1795 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1796 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
1797 #else
1798 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1799 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
1800 #endif
1801 }
1802 APPLY_TAINT_PROPER();
1803 tot = sp - mark;
1804 while (++mark <= sp) {
1805 char *name = SvPVx(*mark, n_a);
1806 APPLY_TAINT_PROPER();
1807 if (PerlLIO_utime(name, utbufp))
1808 tot--;
1809 }
1810 }
1811 else
1812 tot = 0;
1813 break;
1814 #endif
1815 }
1816 return tot;
1817
1818 #undef APPLY_TAINT_PROPER
1819 }
1820
1821 /* Do the permissions allow some operation? Assumes statcache already set. */
1822 #ifndef VMS /* VMS' cando is in vms.c */
1823 bool
Perl_cando(pTHX_ Mode_t mode,Uid_t effective,register Stat_t * statbufp)1824 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1825 /* Note: we use `effective' both for uids and gids.
1826 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1827 {
1828 #ifdef DOSISH
1829 /* [Comments and code from Len Reed]
1830 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1831 * to write-protected files. The execute permission bit is set
1832 * by the Miscrosoft C library stat() function for the following:
1833 * .exe files
1834 * .com files
1835 * .bat files
1836 * directories
1837 * All files and directories are readable.
1838 * Directories and special files, e.g. "CON", cannot be
1839 * write-protected.
1840 * [Comment by Tom Dinger -- a directory can have the write-protect
1841 * bit set in the file system, but DOS permits changes to
1842 * the directory anyway. In addition, all bets are off
1843 * here for networked software, such as Novell and
1844 * Sun's PC-NFS.]
1845 */
1846
1847 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1848 * too so it will actually look into the files for magic numbers
1849 */
1850 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1851
1852 #else /* ! DOSISH */
1853 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1854 if (mode == S_IXUSR) {
1855 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1856 return TRUE;
1857 }
1858 else
1859 return TRUE; /* root reads and writes anything */
1860 return FALSE;
1861 }
1862 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1863 if (statbufp->st_mode & mode)
1864 return TRUE; /* ok as "user" */
1865 }
1866 else if (ingroup(statbufp->st_gid,effective)) {
1867 if (statbufp->st_mode & mode >> 3)
1868 return TRUE; /* ok as "group" */
1869 }
1870 else if (statbufp->st_mode & mode >> 6)
1871 return TRUE; /* ok as "other" */
1872 return FALSE;
1873 #endif /* ! DOSISH */
1874 }
1875 #endif /* ! VMS */
1876
1877 bool
Perl_ingroup(pTHX_ Gid_t testgid,Uid_t effective)1878 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1879 {
1880 #ifdef MACOS_TRADITIONAL
1881 /* This is simply not correct for AppleShare, but fix it yerself. */
1882 return TRUE;
1883 #else
1884 if (testgid == (effective ? PL_egid : PL_gid))
1885 return TRUE;
1886 #ifdef HAS_GETGROUPS
1887 #ifndef NGROUPS
1888 #define NGROUPS 32
1889 #endif
1890 {
1891 I32 anum;
1892 #ifdef __sun
1893 int maxgrp = getgroups(0, NULL);
1894 Groups_t *gary = alloca(maxgrp * sizeof (Groups_t));
1895
1896 anum = getgroups(maxgrp,gary);
1897 #else
1898 Groups_t gary[NGROUPS];
1899
1900 anum = getgroups(NGROUPS,gary);
1901 #endif
1902
1903 while (--anum >= 0)
1904 if (gary[anum] == testgid)
1905 return TRUE;
1906 }
1907 #endif
1908 return FALSE;
1909 #endif
1910 }
1911
1912 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1913
1914 I32
Perl_do_ipcget(pTHX_ I32 optype,SV ** mark,SV ** sp)1915 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1916 {
1917 key_t key;
1918 I32 n, flags;
1919
1920 key = (key_t)SvNVx(*++mark);
1921 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1922 flags = SvIVx(*++mark);
1923 SETERRNO(0,0);
1924 switch (optype)
1925 {
1926 #ifdef HAS_MSG
1927 case OP_MSGGET:
1928 return msgget(key, flags);
1929 #endif
1930 #ifdef HAS_SEM
1931 case OP_SEMGET:
1932 return semget(key, n, flags);
1933 #endif
1934 #ifdef HAS_SHM
1935 case OP_SHMGET:
1936 return shmget(key, n, flags);
1937 #endif
1938 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1939 default:
1940 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1941 #endif
1942 }
1943 return -1; /* should never happen */
1944 }
1945
1946 I32
Perl_do_ipcctl(pTHX_ I32 optype,SV ** mark,SV ** sp)1947 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1948 {
1949 SV *astr;
1950 char *a;
1951 I32 id, n, cmd, infosize, getinfo;
1952 I32 ret = -1;
1953
1954 id = SvIVx(*++mark);
1955 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1956 cmd = SvIVx(*++mark);
1957 astr = *++mark;
1958 infosize = 0;
1959 getinfo = (cmd == IPC_STAT);
1960
1961 switch (optype)
1962 {
1963 #ifdef HAS_MSG
1964 case OP_MSGCTL:
1965 if (cmd == IPC_STAT || cmd == IPC_SET)
1966 infosize = sizeof(struct msqid_ds);
1967 break;
1968 #endif
1969 #ifdef HAS_SHM
1970 case OP_SHMCTL:
1971 if (cmd == IPC_STAT || cmd == IPC_SET)
1972 infosize = sizeof(struct shmid_ds);
1973 break;
1974 #endif
1975 #ifdef HAS_SEM
1976 case OP_SEMCTL:
1977 #ifdef Semctl
1978 if (cmd == IPC_STAT || cmd == IPC_SET)
1979 infosize = sizeof(struct semid_ds);
1980 else if (cmd == GETALL || cmd == SETALL)
1981 {
1982 struct semid_ds semds;
1983 union semun semun;
1984 #ifdef EXTRA_F_IN_SEMUN_BUF
1985 semun.buff = &semds;
1986 #else
1987 semun.buf = &semds;
1988 #endif
1989 getinfo = (cmd == GETALL);
1990 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1991 return -1;
1992 infosize = semds.sem_nsems * sizeof(short);
1993 /* "short" is technically wrong but much more portable
1994 than guessing about u_?short(_t)? */
1995 }
1996 #else
1997 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1998 #endif
1999 break;
2000 #endif
2001 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2002 default:
2003 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2004 #endif
2005 }
2006
2007 if (infosize)
2008 {
2009 STRLEN len;
2010 if (getinfo)
2011 {
2012 SvPV_force(astr, len);
2013 a = SvGROW(astr, infosize+1);
2014 }
2015 else
2016 {
2017 a = SvPV(astr, len);
2018 if (len != infosize)
2019 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2020 PL_op_desc[optype],
2021 (unsigned long)len,
2022 (long)infosize);
2023 }
2024 }
2025 else
2026 {
2027 IV i = SvIV(astr);
2028 a = INT2PTR(char *,i); /* ouch */
2029 }
2030 SETERRNO(0,0);
2031 switch (optype)
2032 {
2033 #ifdef HAS_MSG
2034 case OP_MSGCTL:
2035 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2036 break;
2037 #endif
2038 #ifdef HAS_SEM
2039 case OP_SEMCTL: {
2040 #ifdef Semctl
2041 union semun unsemds;
2042
2043 #ifdef EXTRA_F_IN_SEMUN_BUF
2044 unsemds.buff = (struct semid_ds *)a;
2045 #else
2046 unsemds.buf = (struct semid_ds *)a;
2047 #endif
2048 ret = Semctl(id, n, cmd, unsemds);
2049 #else
2050 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2051 #endif
2052 }
2053 break;
2054 #endif
2055 #ifdef HAS_SHM
2056 case OP_SHMCTL:
2057 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2058 break;
2059 #endif
2060 }
2061 if (getinfo && ret >= 0) {
2062 SvCUR_set(astr, infosize);
2063 *SvEND(astr) = '\0';
2064 SvSETMAGIC(astr);
2065 }
2066 return ret;
2067 }
2068
2069 I32
Perl_do_msgsnd(pTHX_ SV ** mark,SV ** sp)2070 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2071 {
2072 #ifdef HAS_MSG
2073 SV *mstr;
2074 char *mbuf;
2075 I32 id, msize, flags;
2076 STRLEN len;
2077
2078 id = SvIVx(*++mark);
2079 mstr = *++mark;
2080 flags = SvIVx(*++mark);
2081 mbuf = SvPV(mstr, len);
2082 if ((msize = len - sizeof(long)) < 0)
2083 Perl_croak(aTHX_ "Arg too short for msgsnd");
2084 SETERRNO(0,0);
2085 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2086 #else
2087 Perl_croak(aTHX_ "msgsnd not implemented");
2088 #endif
2089 }
2090
2091 I32
Perl_do_msgrcv(pTHX_ SV ** mark,SV ** sp)2092 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2093 {
2094 #ifdef HAS_MSG
2095 SV *mstr;
2096 char *mbuf;
2097 long mtype;
2098 I32 id, msize, flags, ret;
2099 STRLEN len;
2100
2101 id = SvIVx(*++mark);
2102 mstr = *++mark;
2103 /* suppress warning when reading into undef var --jhi */
2104 if (! SvOK(mstr))
2105 sv_setpvn(mstr, "", 0);
2106 msize = SvIVx(*++mark);
2107 mtype = (long)SvIVx(*++mark);
2108 flags = SvIVx(*++mark);
2109 SvPV_force(mstr, len);
2110 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2111
2112 SETERRNO(0,0);
2113 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2114 if (ret >= 0) {
2115 SvCUR_set(mstr, sizeof(long)+ret);
2116 *SvEND(mstr) = '\0';
2117 #ifndef INCOMPLETE_TAINTS
2118 /* who knows who has been playing with this message? */
2119 SvTAINTED_on(mstr);
2120 #endif
2121 }
2122 return ret;
2123 #else
2124 Perl_croak(aTHX_ "msgrcv not implemented");
2125 #endif
2126 }
2127
2128 I32
Perl_do_semop(pTHX_ SV ** mark,SV ** sp)2129 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2130 {
2131 #ifdef HAS_SEM
2132 SV *opstr;
2133 char *opbuf;
2134 I32 id;
2135 STRLEN opsize;
2136
2137 id = SvIVx(*++mark);
2138 opstr = *++mark;
2139 opbuf = SvPV(opstr, opsize);
2140 if (opsize < 3 * SHORTSIZE
2141 || (opsize % (3 * SHORTSIZE))) {
2142 SETERRNO(EINVAL,LIB_INVARG);
2143 return -1;
2144 }
2145 SETERRNO(0,0);
2146 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2147 {
2148 int nsops = opsize / (3 * sizeof (short));
2149 int i = nsops;
2150 short *ops = (short *) opbuf;
2151 short *o = ops;
2152 struct sembuf *temps, *t;
2153 I32 result;
2154
2155 New (0, temps, nsops, struct sembuf);
2156 t = temps;
2157 while (i--) {
2158 t->sem_num = *o++;
2159 t->sem_op = *o++;
2160 t->sem_flg = *o++;
2161 t++;
2162 }
2163 result = semop(id, temps, nsops);
2164 t = temps;
2165 o = ops;
2166 i = nsops;
2167 while (i--) {
2168 *o++ = t->sem_num;
2169 *o++ = t->sem_op;
2170 *o++ = t->sem_flg;
2171 t++;
2172 }
2173 Safefree(temps);
2174 return result;
2175 }
2176 #else
2177 Perl_croak(aTHX_ "semop not implemented");
2178 #endif
2179 }
2180
2181 I32
Perl_do_shmio(pTHX_ I32 optype,SV ** mark,SV ** sp)2182 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2183 {
2184 #ifdef HAS_SHM
2185 SV *mstr;
2186 char *mbuf, *shm;
2187 I32 id, mpos, msize;
2188 STRLEN len;
2189 struct shmid_ds shmds;
2190
2191 id = SvIVx(*++mark);
2192 mstr = *++mark;
2193 mpos = SvIVx(*++mark);
2194 msize = SvIVx(*++mark);
2195 SETERRNO(0,0);
2196 if (shmctl(id, IPC_STAT, &shmds) == -1)
2197 return -1;
2198 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2199 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2200 return -1;
2201 }
2202 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2203 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2204 return -1;
2205 if (optype == OP_SHMREAD) {
2206 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2207 if (! SvOK(mstr))
2208 sv_setpvn(mstr, "", 0);
2209 SvPV_force(mstr, len);
2210 mbuf = SvGROW(mstr, msize+1);
2211
2212 Copy(shm + mpos, mbuf, msize, char);
2213 SvCUR_set(mstr, msize);
2214 *SvEND(mstr) = '\0';
2215 SvSETMAGIC(mstr);
2216 #ifndef INCOMPLETE_TAINTS
2217 /* who knows who has been playing with this shared memory? */
2218 SvTAINTED_on(mstr);
2219 #endif
2220 }
2221 else {
2222 I32 n;
2223
2224 mbuf = SvPV(mstr, len);
2225 if ((n = len) > msize)
2226 n = msize;
2227 Copy(mbuf, shm + mpos, n, char);
2228 if (n < msize)
2229 memzero(shm + mpos + n, msize - n);
2230 }
2231 return shmdt(shm);
2232 #else
2233 Perl_croak(aTHX_ "shm I/O not implemented");
2234 #endif
2235 }
2236
2237 #endif /* SYSV IPC */
2238
2239 /*
2240 =head1 IO Functions
2241
2242 =for apidoc start_glob
2243
2244 Function called by C<do_readline> to spawn a glob (or do the glob inside
2245 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2246 this glob starter is only used by miniperl during the build process.
2247 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2248
2249 =cut
2250 */
2251
2252 PerlIO *
Perl_start_glob(pTHX_ SV * tmpglob,IO * io)2253 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2254 {
2255 SV *tmpcmd = NEWSV(55, 0);
2256 PerlIO *fp;
2257 ENTER;
2258 SAVEFREESV(tmpcmd);
2259 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2260 /* since spawning off a process is a real performance hit */
2261 {
2262 #include <descrip.h>
2263 #include <lib$routines.h>
2264 #include <nam.h>
2265 #include <rmsdef.h>
2266 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2267 char vmsspec[NAM$C_MAXRSS+1];
2268 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
2269 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2270 PerlIO *tmpfp;
2271 STRLEN i;
2272 struct dsc$descriptor_s wilddsc
2273 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2274 struct dsc$descriptor_vs rsdsc
2275 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2276 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2277
2278 /* We could find out if there's an explicit dev/dir or version
2279 by peeking into lib$find_file's internal context at
2280 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2281 but that's unsupported, so I don't want to do it now and
2282 have it bite someone in the future. */
2283 cp = SvPV(tmpglob,i);
2284 for (; i; i--) {
2285 if (cp[i] == ';') hasver = 1;
2286 if (cp[i] == '.') {
2287 if (sts) hasver = 1;
2288 else sts = 1;
2289 }
2290 if (cp[i] == '/') {
2291 hasdir = isunix = 1;
2292 break;
2293 }
2294 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2295 hasdir = 1;
2296 break;
2297 }
2298 }
2299 if ((tmpfp = PerlIO_tmpfile()) != NULL) {
2300 Stat_t st;
2301 if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
2302 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2303 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
2304 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2305 for (cp=wilddsc.dsc$a_pointer; ok && cp && *cp; cp++)
2306 if (*cp == '?') *cp = '%'; /* VMS style single-char wildcard */
2307 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2308 &dfltdsc,NULL,NULL,NULL))&1)) {
2309 /* with varying string, 1st word of buffer contains result length */
2310 end = rstr + *((unsigned short int*)rslt);
2311 if (!hasver) while (*end != ';' && end > rstr) end--;
2312 *(end++) = '\n'; *end = '\0';
2313 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2314 if (hasdir) {
2315 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2316 begin = rstr;
2317 }
2318 else {
2319 begin = end;
2320 while (*(--begin) != ']' && *begin != '>') ;
2321 ++begin;
2322 }
2323 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2324 }
2325 if (cxt) (void)lib$find_file_end(&cxt);
2326 if (ok && sts != RMS$_NMF &&
2327 sts != RMS$_DNF && sts != RMS_FNF) ok = 0;
2328 if (!ok) {
2329 if (!(sts & 1)) {
2330 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2331 }
2332 PerlIO_close(tmpfp);
2333 fp = NULL;
2334 }
2335 else {
2336 PerlIO_rewind(tmpfp);
2337 IoTYPE(io) = IoTYPE_RDONLY;
2338 IoIFP(io) = fp = tmpfp;
2339 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2340 }
2341 }
2342 }
2343 #else /* !VMS */
2344 #ifdef MACOS_TRADITIONAL
2345 sv_setpv(tmpcmd, "glob ");
2346 sv_catsv(tmpcmd, tmpglob);
2347 sv_catpv(tmpcmd, " |");
2348 #else
2349 #ifdef DOSISH
2350 #ifdef OS2
2351 sv_setpv(tmpcmd, "for a in ");
2352 sv_catsv(tmpcmd, tmpglob);
2353 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2354 #else
2355 #ifdef DJGPP
2356 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2357 sv_catsv(tmpcmd, tmpglob);
2358 #else
2359 sv_setpv(tmpcmd, "perlglob ");
2360 sv_catsv(tmpcmd, tmpglob);
2361 sv_catpv(tmpcmd, " |");
2362 #endif /* !DJGPP */
2363 #endif /* !OS2 */
2364 #else /* !DOSISH */
2365 #if defined(CSH)
2366 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2367 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2368 sv_catsv(tmpcmd, tmpglob);
2369 sv_catpv(tmpcmd, "' 2>/dev/null |");
2370 #else
2371 sv_setpv(tmpcmd, "echo ");
2372 sv_catsv(tmpcmd, tmpglob);
2373 #if 'z' - 'a' == 25
2374 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2375 #else
2376 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2377 #endif
2378 #endif /* !CSH */
2379 #endif /* !DOSISH */
2380 #endif /* MACOS_TRADITIONAL */
2381 (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
2382 FALSE, O_RDONLY, 0, Nullfp);
2383 fp = IoIFP(io);
2384 #endif /* !VMS */
2385 LEAVE;
2386 return fp;
2387 }
2388