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[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
1129b882
NC		 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a687059c 5 *
6e21c824
LW		 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.
a687059c 8 *
a0d0e21e
LW		 9 */
10
11/*
4ac71550
TC		 12 * Far below them they saw the white waters pour into a foaming bowl, and
13 * then swirl darkly about a deep oval basin in the rocks, until they found
14 * their way out again through a narrow gate, and flowed away, fuming and
15 * chattering, into calmer and more level reaches.
16 *
17 * [p.684 of _The Lord of the Rings_, IV/vi: "The Forbidden Pool"]
a687059c
LW		 18 */
19
166f8a29
DM		 20/* This file contains functions that do the actual I/O on behalf of ops.
21 * For example, pp_print() calls the do_print() function in this file for
22 * each argument needing printing.
23 */
24
a687059c 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_DOIO_C
a687059c
LW		 27#include "perl.h"
28
fe14fcc3 29#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 30#ifndef HAS_SEM
c2ab57d4 31#include <sys/ipc.h>
aec308ec 32#endif
fe14fcc3 33#ifdef HAS_MSG
c2ab57d4 34#include <sys/msg.h>
e5d73d77 35#endif
fe14fcc3 36#ifdef HAS_SHM
c2ab57d4 37#include <sys/shm.h>
a0d0e21e 38# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 39 extern Shmat_t shmat (int, char *, int);
a0d0e21e 40# endif
c2ab57d4 41#endif
e5d73d77 42#endif
c2ab57d4 43
663a0e37 44#ifdef I_UTIME
3730b96e 45# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
PP		 46# include <sys/utime.h>
47# else
48# include <utime.h>
49# endif
663a0e37 50#endif
85aff577 51
85aff577
CS		 52#ifdef O_EXCL
53# define OPEN_EXCL O_EXCL
54#else
55# define OPEN_EXCL 0
56#endif
a687059c 57
0c19750d
SP		 58#define PERL_MODE_MAX 8
59#define PERL_FLAGS_MAX 10
60
76121258 61#include <signal.h>
76121258 62
74df577f 63void
1cdb2692 64Perl_setfd_cloexec(int fd)
74df577f
Z		 65{
66 assert(fd >= 0);
f9821aff 67#if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
74df577f 68 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
f9821aff 69#endif
74df577f
Z		 70}
71
72void
1cdb2692 73Perl_setfd_inhexec(int fd)
74df577f
Z		 74{
75 assert(fd >= 0);
76#if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
77 (void) fcntl(fd, F_SETFD, 0);
78#endif
79}
80
81void
884fc2d3
Z		 82Perl_setfd_cloexec_for_nonsysfd(pTHX_ int fd)
83{
84 assert(fd >= 0);
85 if(fd > PL_maxsysfd)
86 setfd_cloexec(fd);
87}
88
89void
74df577f
Z		 90Perl_setfd_inhexec_for_sysfd(pTHX_ int fd)
91{
92 assert(fd >= 0);
93 if(fd <= PL_maxsysfd)
94 setfd_inhexec(fd);
95}
884fc2d3
Z		 96void
97Perl_setfd_cloexec_or_inhexec_by_sysfdness(pTHX_ int fd)
98{
99 assert(fd >= 0);
100 if(fd <= PL_maxsysfd)
101 setfd_inhexec(fd);
102 else
103 setfd_cloexec(fd);
104}
105
74df577f
Z		 106
107#define DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC) \
f9821aff
Z		 108 do { \
109 int res = (GENOPEN_NORMAL); \
74df577f 110 if(LIKELY(res != -1)) GENSETFD_CLOEXEC; \
f9821aff
Z		 111 return res; \
112 } while(0)
113#if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC) && \
114 defined(F_GETFD)
115enum { CLOEXEC_EXPERIMENT, CLOEXEC_AT_OPEN, CLOEXEC_AFTER_OPEN };
116# define DO_GENOPEN_EXPERIMENTING_CLOEXEC(TESTFD, GENOPEN_CLOEXEC, \
74df577f 117 GENOPEN_NORMAL, GENSETFD_CLOEXEC) \
f9821aff
Z		 118 do { \
119 static int strategy = CLOEXEC_EXPERIMENT; \
120 switch (strategy) { \
121 case CLOEXEC_EXPERIMENT: default: { \
122 int res = (GENOPEN_CLOEXEC), eno; \
123 if (LIKELY(res != -1)) { \
124 int fdflags = fcntl((TESTFD), F_GETFD); \
125 if (LIKELY(fdflags != -1) && \
126 LIKELY(fdflags & FD_CLOEXEC)) { \
127 strategy = CLOEXEC_AT_OPEN; \
128 } else { \
129 strategy = CLOEXEC_AFTER_OPEN; \
74df577f 130 GENSETFD_CLOEXEC; \
f9821aff
Z		 131 } \
132 } else if (UNLIKELY((eno = errno) == EINVAL || \
133 eno == ENOSYS)) { \
134 res = (GENOPEN_NORMAL); \
135 if (LIKELY(res != -1)) { \
136 strategy = CLOEXEC_AFTER_OPEN; \
74df577f 137 GENSETFD_CLOEXEC; \
f9821aff
Z		 138 } else if (!LIKELY((eno = errno) == EINVAL || \
139 eno == ENOSYS)) { \
140 strategy = CLOEXEC_AFTER_OPEN; \
141 } \
142 } \
143 return res; \
144 } \
145 case CLOEXEC_AT_OPEN: \
146 return (GENOPEN_CLOEXEC); \
147 case CLOEXEC_AFTER_OPEN: \
74df577f 148 DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC); \
f9821aff
Z		 149 } \
150 } while(0)
151#else
152# define DO_GENOPEN_EXPERIMENTING_CLOEXEC(TESTFD, GENOPEN_CLOEXEC, \
74df577f
Z		 153 GENOPEN_NORMAL, GENSETFD_CLOEXEC) \
154 DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC)
f9821aff
Z		 155#endif
156
157#define DO_ONEOPEN_THEN_CLOEXEC(ONEOPEN_NORMAL) \
158 do { \
159 int fd; \
160 DO_GENOPEN_THEN_CLOEXEC(fd = (ONEOPEN_NORMAL), \
74df577f 161 setfd_cloexec(fd)); \
f9821aff
Z		 162 } while(0)
163#define DO_ONEOPEN_EXPERIMENTING_CLOEXEC(ONEOPEN_CLOEXEC, ONEOPEN_NORMAL) \
164 do { \
165 int fd; \
166 DO_GENOPEN_EXPERIMENTING_CLOEXEC(fd, fd = (ONEOPEN_CLOEXEC), \
74df577f 167 fd = (ONEOPEN_NORMAL), setfd_cloexec(fd)); \
f9821aff
Z		 168 } while(0)
169
74df577f 170#define DO_PIPESETFD_CLOEXEC(PIPEFD) \
f9821aff 171 do { \
74df577f
Z		 172 setfd_cloexec((PIPEFD)[0]); \
173 setfd_cloexec((PIPEFD)[1]); \
f9821aff
Z		 174 } while(0)
175#define DO_PIPEOPEN_THEN_CLOEXEC(PIPEFD, PIPEOPEN_NORMAL) \
74df577f 176 DO_GENOPEN_THEN_CLOEXEC(PIPEOPEN_NORMAL, DO_PIPESETFD_CLOEXEC(PIPEFD))
f9821aff
Z		 177#define DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(PIPEFD, PIPEOPEN_CLOEXEC, \
178 PIPEOPEN_NORMAL) \
179 DO_GENOPEN_EXPERIMENTING_CLOEXEC((PIPEFD)[0], PIPEOPEN_CLOEXEC, \
74df577f 180 PIPEOPEN_NORMAL, DO_PIPESETFD_CLOEXEC(PIPEFD))
f9821aff
Z		 181
182int
183Perl_PerlLIO_dup_cloexec(pTHX_ int oldfd)
184{
185#if !defined(PERL_IMPLICIT_SYS) && defined(F_DUPFD_CLOEXEC)
186 /*
187 * struct IPerlLIO doesn't cover fcntl(), and there's no clear way
188 * to extend it, so for the time being this just isn't available on
189 * PERL_IMPLICIT_SYS builds.
190 */
191 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
192 fcntl(oldfd, F_DUPFD_CLOEXEC, 0),
193 PerlLIO_dup(oldfd));
194#else
195 DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_dup(oldfd));
196#endif
197}
198
199int
200Perl_PerlLIO_dup2_cloexec(pTHX_ int oldfd, int newfd)
201{
202#if !defined(PERL_IMPLICIT_SYS) && defined(HAS_DUP3) && defined(O_CLOEXEC)
203 /*
204 * struct IPerlLIO doesn't cover dup3(), and there's no clear way
205 * to extend it, so for the time being this just isn't available on
206 * PERL_IMPLICIT_SYS builds.
207 */
208 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
209 dup3(oldfd, newfd, O_CLOEXEC),
210 PerlLIO_dup2(oldfd, newfd));
211#else
212 DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_dup2(oldfd, newfd));
213#endif
214}
215
216int
217Perl_PerlLIO_open_cloexec(pTHX_ const char *file, int flag)
218{
219 PERL_ARGS_ASSERT_PERLLIO_OPEN_CLOEXEC;
220#if defined(O_CLOEXEC)
221 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
222 PerlLIO_open(file, flag | O_CLOEXEC),
223 PerlLIO_open(file, flag));
224#else
225 DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_open(file, flag));
226#endif
227}
228
229int
230Perl_PerlLIO_open3_cloexec(pTHX_ const char *file, int flag, int perm)
231{
232 PERL_ARGS_ASSERT_PERLLIO_OPEN3_CLOEXEC;
233#if defined(O_CLOEXEC)
234 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
235 PerlLIO_open3(file, flag | O_CLOEXEC, perm),
236 PerlLIO_open3(file, flag, perm));
237#else
238 DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_open3(file, flag, perm));
239#endif
240}
241
1cdb2692
Z		 242int
243Perl_my_mkstemp_cloexec(char *templte)
244{
245 PERL_ARGS_ASSERT_MY_MKSTEMP_CLOEXEC;
246#if defined(O_CLOEXEC)
247 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
248 Perl_my_mkostemp(templte, O_CLOEXEC),
249 Perl_my_mkstemp(templte));
250#else
251 DO_ONEOPEN_THEN_CLOEXEC(Perl_my_mkstemp(templte));
252#endif
253}
254
f9821aff
Z		 255#ifdef HAS_PIPE
256int
257Perl_PerlProc_pipe_cloexec(pTHX_ int *pipefd)
258{
259 PERL_ARGS_ASSERT_PERLPROC_PIPE_CLOEXEC;
260 /*
261 * struct IPerlProc doesn't cover pipe2(), and there's no clear way
262 * to extend it, so for the time being this just isn't available on
263 * PERL_IMPLICIT_SYS builds.
264 */
265# if !defined(PERL_IMPLICIT_SYS) && defined(HAS_PIPE2) && defined(O_CLOEXEC)
266 DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(pipefd,
267 pipe2(pipefd, O_CLOEXEC),
268 PerlProc_pipe(pipefd));
269# else
270 DO_PIPEOPEN_THEN_CLOEXEC(pipefd, PerlProc_pipe(pipefd));
271# endif
272}
273#endif
274
275#ifdef HAS_SOCKET
276
277int
278Perl_PerlSock_socket_cloexec(pTHX_ int domain, int type, int protocol)
279{
280# if defined(SOCK_CLOEXEC)
281 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
282 PerlSock_socket(domain, type | SOCK_CLOEXEC, protocol),
283 PerlSock_socket(domain, type, protocol));
284# else
285 DO_ONEOPEN_THEN_CLOEXEC(PerlSock_socket(domain, type, protocol));
286# endif
287}
288
289int
290Perl_PerlSock_accept_cloexec(pTHX_ int listenfd, struct sockaddr *addr,
291 Sock_size_t *addrlen)
292{
293# if !defined(PERL_IMPLICIT_SYS) && \
294 defined(HAS_ACCEPT4) && defined(SOCK_CLOEXEC)
295 /*
296 * struct IPerlSock doesn't cover accept4(), and there's no clear
297 * way to extend it, so for the time being this just isn't available
298 * on PERL_IMPLICIT_SYS builds.
299 */
300 DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
301 accept4(listenfd, addr, addrlen, SOCK_CLOEXEC),
302 PerlSock_accept(listenfd, addr, addrlen));
303# else
304 DO_ONEOPEN_THEN_CLOEXEC(PerlSock_accept(listenfd, addr, addrlen));
305# endif
306}
307
308#endif
309
310#if defined (HAS_SOCKETPAIR) || \
311 (defined (HAS_SOCKET) && defined(SOCK_DGRAM) && \
312 defined(AF_INET) && defined(PF_INET))
313int
314Perl_PerlSock_socketpair_cloexec(pTHX_ int domain, int type, int protocol,
315 int *pairfd)
316{
317 PERL_ARGS_ASSERT_PERLSOCK_SOCKETPAIR_CLOEXEC;
318# ifdef SOCK_CLOEXEC
319 DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(pairfd,
320 PerlSock_socketpair(domain, type | SOCK_CLOEXEC, protocol, pairfd),
321 PerlSock_socketpair(domain, type, protocol, pairfd));
322# else
323 DO_PIPEOPEN_THEN_CLOEXEC(pairfd,
324 PerlSock_socketpair(domain, type, protocol, pairfd));
325# endif
326}
327#endif
328
a2b41d5c
NC		 329static IO *
330S_openn_setup(pTHX_ GV *gv, char *mode, PerlIO **saveifp, PerlIO **saveofp,
331 int *savefd, char *savetype)
a567e93b 332{
eb578fdb 333 IO * const io = GvIOn(gv);
a687059c 334
a2b41d5c
NC		 335 PERL_ARGS_ASSERT_OPENN_SETUP;
336
337 *saveifp = NULL;
338 *saveofp = NULL;
339 *savefd = -1;
340 *savetype = IoTYPE_CLOSED;
7918f24d 341
b931b1d9 342 Zero(mode,sizeof(mode),char);
3280af22 343 PL_forkprocess = 1; /* assume true if no fork */
c07a80fd 344
b931b1d9 345 /* If currently open - close before we re-open */
a0d0e21e 346 if (IoIFP(io)) {
ee518936
NIS		 347 if (IoTYPE(io) == IoTYPE_STD) {
348 /* This is a clone of one of STD* handles */
ee518936 349 }
26297fe9
NC		 350 else {
351 const int old_fd = PerlIO_fileno(IoIFP(io));
352
353 if (old_fd >= 0 && old_fd <= PL_maxsysfd) {
354 /* This is one of the original STD* handles */
a2b41d5c
NC		 355 *saveifp = IoIFP(io);
356 *saveofp = IoOFP(io);
357 *savetype = IoTYPE(io);
358 *savefd = old_fd;
26297fe9
NC		 359 }
360 else {
361 int result;
362
363 if (IoTYPE(io) == IoTYPE_PIPE)
364 result = PerlProc_pclose(IoIFP(io));
365 else if (IoIFP(io) != IoOFP(io)) {
366 if (IoOFP(io)) {
367 result = PerlIO_close(IoOFP(io));
368 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
369 }
370 else
371 result = PerlIO_close(IoIFP(io));
372 }
373 else
374 result = PerlIO_close(IoIFP(io));
375
376 if (result == EOF && old_fd > PL_maxsysfd) {
377 /* Why is this not Perl_warn*() call ? */
378 PerlIO_printf(Perl_error_log,
147e3846
KW		 379 "Warning: unable to close filehandle %" HEKf
380 " properly.\n",
26297fe9
NC		 381 HEKfARG(GvENAME_HEK(gv))
382 );
383 }
384 }
385 }
4608196e 386 IoOFP(io) = IoIFP(io) = NULL;
a687059c 387 }
a2b41d5c
NC		 388 return io;
389}
390
391bool
392Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw,
393 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
394 I32 num_svs)
395{
4b451737
NC		 396 PERL_ARGS_ASSERT_DO_OPENN;
397
398 if (as_raw) {
399 /* sysopen style args, i.e. integer mode and permissions */
400
401 if (num_svs != 0) {
402 Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld",
403 (long) num_svs);
404 }
7e30e49f 405 return do_open_raw(gv, oname, len, rawmode, rawperm, NULL);
4b451737
NC		 406 }
407 return do_open6(gv, oname, len, supplied_fp, svp, num_svs);
408}
409
410bool
411Perl_do_open_raw(pTHX_ GV *gv, const char *oname, STRLEN len,
7e30e49f 412 int rawmode, int rawperm, Stat_t *statbufp)
4b451737 413{
a2b41d5c
NC		 414 PerlIO *saveifp;
415 PerlIO *saveofp;
416 int savefd;
417 char savetype;
418 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
419 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
420 int writing = 0;
421 PerlIO *fp;
a2b41d5c 422
4b451737 423 PERL_ARGS_ASSERT_DO_OPEN_RAW;
c07a80fd 424
4b451737
NC		 425 /* For ease of blame back to 5.000, keep the existing indenting. */
426 {
b931b1d9 427 /* sysopen style args, i.e. integer mode and permissions */
ee518936 428 STRLEN ix = 0;
e1ec3a88 429 const int appendtrunc =
3dccc55c 430 0
d1da7611 431#ifdef O_APPEND /* Not fully portable. */
3dccc55c 432 |O_APPEND
d1da7611
JH		 433#endif
434#ifdef O_TRUNC /* Not fully portable. */
3dccc55c 435 |O_TRUNC
d1da7611 436#endif
3dccc55c 437 ;
6867be6d 438 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
3dccc55c 439 int ismodifying;
9229bf8d 440 SV *namesv;
3dccc55c 441
3dccc55c
JH		 442 /* It's not always
443
444 O_RDONLY 0
445 O_WRONLY 1
446 O_RDWR 2
447
448 It might be (in OS/390 and Mac OS Classic it is)
449
450 O_WRONLY 1
451 O_RDONLY 2
452 O_RDWR 3
453
454 This means that simple & with O_RDWR would look
455 like O_RDONLY is present. Therefore we have to
456 be more careful.
457 */
458 if ((ismodifying = (rawmode & modifyingmode))) {
459 if ((ismodifying & O_WRONLY) == O_WRONLY ||
460 (ismodifying & O_RDWR) == O_RDWR ||
461 (ismodifying & (O_CREAT|appendtrunc)))
462 TAINT_PROPER("sysopen");
463 }
3b6c1aba 464 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
b931b1d9 465
09458382 466#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
b94c04ac 467 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
5ff3f7a4
GS		 468#endif
469
06c7082d 470 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
ee518936 471
59cd0e26 472 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
4b451737 473 fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv);
a687059c 474 }
4b451737 475 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
7e30e49f 476 savetype, writing, 0, NULL, statbufp);
4b451737
NC		 477}
478
479bool
480Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len,
481 PerlIO *supplied_fp, SV **svp, U32 num_svs)
482{
4b451737
NC		 483 PerlIO *saveifp;
484 PerlIO *saveofp;
485 int savefd;
486 char savetype;
487 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
488 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
489 int writing = 0;
490 PerlIO *fp;
491 bool was_fdopen = FALSE;
492 char *type = NULL;
493
494 PERL_ARGS_ASSERT_DO_OPEN6;
495
496 /* For ease of blame back to 5.000, keep the existing indenting. */
497 {
b931b1d9 498 /* Regular (non-sys) open */
2fbb330f 499 char *name;
faecd977 500 STRLEN olen = len;
b931b1d9
NIS		 501 char *tend;
502 int dodup = 0;
c564b489
NC		 503 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
504
505 /* Collect default raw/crlf info from the op */
506 if (PL_op && PL_op->op_type == OP_OPEN) {
507 /* set up IO layers */
508 const U8 flags = PL_op->op_private;
509 in_raw = (flags & OPpOPEN_IN_RAW);
510 in_crlf = (flags & OPpOPEN_IN_CRLF);
511 out_raw = (flags & OPpOPEN_OUT_RAW);
512 out_crlf = (flags & OPpOPEN_OUT_CRLF);
513 }
c07a80fd 514
2fbb330f 515 type = savepvn(oname, len);
b931b1d9 516 tend = type+len;
faecd977 517 SAVEFREEPV(type);
eb649f83
AMS		 518
519 /* Lose leading and trailing white space */
294b3b39
AL		 520 while (isSPACE(*type))
521 type++;
eb649f83
AMS		 522 while (tend > type && isSPACE(tend[-1]))
523 *--tend = '\0';
524
6170680b 525 if (num_svs) {
41188aa0
TC		 526 const char *p;
527 STRLEN nlen = 0;
c2be40b1 528 /* New style explicit name, type is just mode and layer info */
9a869a14 529#ifdef USE_STDIO
9a73c0b8 530 if (SvROK(*svp) && !memchr(oname, '&', len)) {
9a869a14
RGS		 531 if (ckWARN(WARN_IO))
532 Perl_warner(aTHX_ packWARN(WARN_IO),
533 "Can't open a reference");
93189314 534 SETERRNO(EINVAL, LIB_INVARG);
a6fc70e5 535 fp = NULL;
9a869a14
RGS		 536 goto say_false;
537 }
538#endif /* USE_STDIO */
41188aa0
TC		 539 p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL;
540
a6fc70e5
NC		 541 if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) {
542 fp = NULL;
c8028aa6 543 goto say_false;
a6fc70e5 544 }
c8028aa6 545
41188aa0
TC		 546 name = p ? savepvn(p, nlen) : savepvs("");
547
faecd977 548 SAVEFREEPV(name);
6170680b 549 }
faecd977 550 else {
faecd977 551 name = type;
b931b1d9 552 len = tend-type;
faecd977 553 }
6170680b 554 IoTYPE(io) = *type;
516a5887 555 if ((*type == IoTYPE_RDWR) && /* scary */
01a8ea99 556 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
516a5887 557 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
c2be40b1 558 TAINT_PROPER("open");
6170680b 559 mode[1] = *type++;
c07a80fd 560 writing = 1;
a687059c 561 }
c07a80fd 562
9f37169a 563 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS		 564 if (num_svs) {
565 if (type[1] != IoTYPE_STD) {
c2be40b1 566 unknown_open_mode:
b931b1d9
NIS		 567 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
568 }
569 type++;
6170680b 570 }
294b3b39
AL		 571 do {
572 type++;
573 } while (isSPACE(*type));
faecd977 574 if (!num_svs) {
6170680b 575 name = type;
b931b1d9 576 len = tend-type;
faecd977 577 }
4a7d1889
NIS		 578 if (*name == '\0') {
579 /* command is missing 19990114 */
06eaf0bc 580 if (ckWARN(WARN_PIPE))
9014280d 581 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc 582 errno = EPIPE;
a6fc70e5 583 fp = NULL;
06eaf0bc
GS		 584 goto say_false;
585 }
f27977c3 586 if (!(*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP		 587 TAINT_ENV();
588 TAINT_PROPER("piped open");
b931b1d9 589 if (!num_svs && name[len-1] == '|') {
faecd977 590 name[--len] = '\0' ;
599cee73 591 if (ckWARN(WARN_PIPE))
9014280d 592 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 593 }
a1d180c4 594 mode[0] = 'w';
c07a80fd 595 writing = 1;
0c19750d 596 if (out_raw)
5686ee58 597 mode[1] = 'b';
0c19750d 598 else if (out_crlf)
5686ee58 599 mode[1] = 't';
4a7d1889
NIS		 600 if (num_svs > 1) {
601 fp = PerlProc_popen_list(mode, num_svs, svp);
602 }
603 else {
604 fp = PerlProc_popen(name,mode);
605 }
1771866f
NIS		 606 if (num_svs) {
607 if (*type) {
608 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
a6fc70e5 609 fp = NULL;
1771866f
NIS		 610 goto say_false;
611 }
612 }
613 }
c2be40b1 614 } /* IoTYPE_PIPE */
9f37169a 615 else if (*type == IoTYPE_WRONLY) {
c07a80fd 616 TAINT_PROPER("open");
6170680b 617 type++;
9f37169a
JH		 618 if (*type == IoTYPE_WRONLY) {
619 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 620 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 621 type++;
a0d0e21e 622 }
ee518936 623 else {
c07a80fd 624 mode[0] = 'w';
ee518936 625 }
c07a80fd
PP		 626 writing = 1;
627
0c19750d 628 if (out_raw)
5686ee58 629 mode[1] = 'b';
0c19750d 630 else if (out_crlf)
5686ee58 631 mode[1] = 't';
6170680b 632 if (*type == '&') {
c07a80fd 633 duplicity:
ecdeb87c 634 dodup = PERLIO_DUP_FD;
e620cd72
NIS		 635 type++;
636 if (*type == '=') {
c07a80fd 637 dodup = 0;
e620cd72 638 type++;
4a7d1889 639 }
ee518936 640 if (!num_svs && !*type && supplied_fp) {
4a7d1889 641 /* "<+&" etc. is used by typemaps */
c07a80fd 642 fp = supplied_fp;
ee518936 643 }
a0d0e21e 644 else {
35da51f7 645 PerlIO *that_fp = NULL;
b4464d55 646 int wanted_fd;
22ff3130 647 UV uv;
e620cd72 648 if (num_svs > 1) {
fe13d51d 649 /* diag_listed_as: More than one argument to '%s' open */
e620cd72
NIS		 650 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
651 }
294b3b39
AL		 652 while (isSPACE(*type))
653 type++;
f90b7232
FC		 654 if (num_svs && (
655 SvIOK(*svp)
656 || (SvPOKp(*svp) && looks_like_number(*svp))
657 )) {
b4464d55 658 wanted_fd = SvUV(*svp);
24a7a40d 659 num_svs = 0;
ee518936 660 }
22ff3130
HS		 661 else if (isDIGIT(*type)
662 && grok_atoUV(type, &uv, NULL)
663 && uv <= INT_MAX
664 ) {
665 wanted_fd = (int)uv;
e620cd72 666 }
c07a80fd 667 else {
e1ec3a88 668 const IO* thatio;
e620cd72
NIS		 669 if (num_svs) {
670 thatio = sv_2io(*svp);
671 }
672 else {
35da51f7 673 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 674 0, SVt_PVIO);
e620cd72
NIS		 675 thatio = GvIO(thatgv);
676 }
c07a80fd 677 if (!thatio) {
6e21c824 678#ifdef EINVAL
93189314 679 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 680#endif
a6fc70e5 681 fp = NULL;
c07a80fd
PP		 682 goto say_false;
683 }
f4e789af 684 if ((that_fp = IoIFP(thatio))) {
7211d486
JH		 685 /* Flush stdio buffer before dup. --mjd
686 * Unfortunately SEEK_CURing 0 seems to
687 * be optimized away on most platforms;
688 * only Solaris and Linux seem to flush
689 * on that. --jhi */
7211d486
JH		 690 /* On the other hand, do all platforms
691 * take gracefully to flushing a read-only
692 * filehandle? Perhaps we should do
693 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c 694 PerlIO_flush(that_fp);
b4464d55 695 wanted_fd = PerlIO_fileno(that_fp);
0759c907
JH		 696 /* When dup()ing STDIN, STDOUT or STDERR
697 * explicitly set appropriate access mode */
f4e789af
NC		 698 if (that_fp == PerlIO_stdout()
699 || that_fp == PerlIO_stderr())
0759c907 700 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 701 else if (that_fp == PerlIO_stdin())
0759c907
JH		 702 IoTYPE(io) = IoTYPE_RDONLY;
703 /* When dup()ing a socket, say result is
704 * one as well */
705 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 706 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd 707 }
0c9375a5
TC		 708 else {
709 SETERRNO(EBADF, RMS_IFI);
710 fp = NULL;
711 goto say_false;
712 }
a0d0e21e 713 }
ee518936 714 if (!num_svs)
bd61b366 715 type = NULL;
ecdeb87c
NIS		 716 if (that_fp) {
717 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
718 }
719 else {
c07a80fd 720 if (dodup)
884fc2d3 721 wanted_fd = PerlLIO_dup_cloexec(wanted_fd);
ecdeb87c
NIS		 722 else
723 was_fdopen = TRUE;
b4464d55
NC		 724 if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) {
725 if (dodup && wanted_fd >= 0)
726 PerlLIO_close(wanted_fd);
ecdeb87c 727 }
faecd977 728 }
c07a80fd 729 }
ee518936 730 } /* & */
c07a80fd 731 else {
294b3b39
AL		 732 while (isSPACE(*type))
733 type++;
b931b1d9 734 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 735 type++;
760ac839 736 fp = PerlIO_stdout();
50952442 737 IoTYPE(io) = IoTYPE_STD;
7cf31beb 738 if (num_svs > 1) {
fe13d51d 739 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS		 740 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
741 }
c07a80fd
PP		 742 }
743 else {
9229bf8d
NC		 744 if (num_svs) {
745 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
746 }
747 else {
748 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
bd61b366 749 type = NULL;
9229bf8d 750 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
ee518936 751 }
c07a80fd 752 }
ee518936 753 } /* !& */
7e72d509
JH		 754 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
755 goto unknown_open_mode;
c2be40b1 756 } /* IoTYPE_WRONLY */
9f37169a 757 else if (*type == IoTYPE_RDONLY) {
294b3b39
AL		 758 do {
759 type++;
760 } while (isSPACE(*type));
bf38876a 761 mode[0] = 'r';
0c19750d 762 if (in_raw)
5686ee58 763 mode[1] = 'b';
0c19750d 764 else if (in_crlf)
5686ee58 765 mode[1] = 't';
6170680b 766 if (*type == '&') {
bf38876a 767 goto duplicity;
6170680b 768 }
b931b1d9 769 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 770 type++;
760ac839 771 fp = PerlIO_stdin();
50952442 772 IoTYPE(io) = IoTYPE_STD;
7cf31beb 773 if (num_svs > 1) {
fe13d51d 774 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS		 775 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
776 }
a687059c 777 }
ee518936 778 else {
9229bf8d
NC		 779 if (num_svs) {
780 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
781 }
782 else {
783 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
bd61b366 784 type = NULL;
9229bf8d 785 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
ee518936 786 }
ee518936 787 }
7e72d509
JH		 788 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
789 goto unknown_open_mode;
c2be40b1
JH		 790 } /* IoTYPE_RDONLY */
791 else if ((num_svs && /* '-|...' or '...|' */
792 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 793 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 794 if (num_svs) {
b931b1d9 795 type += 2; /* skip over '-|' */
6170680b
IZ		 796 }
797 else {
b931b1d9
NIS		 798 *--tend = '\0';
799 while (tend > type && isSPACE(tend[-1]))
800 *--tend = '\0';
a6e20a40
AL		 801 for (; isSPACE(*type); type++)
802 ;
6170680b 803 name = type;
b931b1d9 804 len = tend-type;
6170680b 805 }
4a7d1889
NIS		 806 if (*name == '\0') {
807 /* command is missing 19990114 */
06eaf0bc 808 if (ckWARN(WARN_PIPE))
9014280d 809 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc 810 errno = EPIPE;
a6fc70e5 811 fp = NULL;
06eaf0bc
GS		 812 goto say_false;
813 }
770526c1 814 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW		 815 TAINT_ENV();
816 TAINT_PROPER("piped open");
a1d180c4 817 mode[0] = 'r';
0c19750d 818
0c19750d 819 if (in_raw)
5686ee58 820 mode[1] = 'b';
0c19750d 821 else if (in_crlf)
5686ee58 822 mode[1] = 't';
0c19750d 823
4a7d1889
NIS		 824 if (num_svs > 1) {
825 fp = PerlProc_popen_list(mode,num_svs,svp);
826 }
e620cd72 827 else {
4a7d1889
NIS		 828 fp = PerlProc_popen(name,mode);
829 }
50952442 830 IoTYPE(io) = IoTYPE_PIPE;
1771866f 831 if (num_svs) {
294b3b39
AL		 832 while (isSPACE(*type))
833 type++;
1771866f
NIS		 834 if (*type) {
835 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
a6fc70e5 836 fp = NULL;
1771866f
NIS		 837 goto say_false;
838 }
839 }
840 }
a687059c 841 }
c2be40b1 842 else { /* layer(Args) */
6170680b 843 if (num_svs)
c2be40b1 844 goto unknown_open_mode;
6170680b 845 name = type;
50952442 846 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL		 847 for (; isSPACE(*name); name++)
848 ;
88b61e10 849 mode[0] = 'r';
0c19750d 850
0c19750d 851 if (in_raw)
5686ee58 852 mode[1] = 'b';
0c19750d 853 else if (in_crlf)
5686ee58 854 mode[1] = 't';
0c19750d 855
770526c1 856 if (*name == '-' && name[1] == '\0') {
760ac839 857 fp = PerlIO_stdin();
50952442 858 IoTYPE(io) = IoTYPE_STD;
a687059c 859 }
16fe6d59 860 else {
9229bf8d
NC		 861 if (num_svs) {
862 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
863 }
864 else {
865 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
bd61b366 866 type = NULL;
9229bf8d 867 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
ee518936 868 }
16fe6d59 869 }
a687059c
LW		 870 }
871 }
a6fc70e5
NC		 872
873 say_false:
874 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
7e30e49f 875 savetype, writing, was_fdopen, type, NULL);
a6fc70e5
NC		 876}
877
878/* Yes, this is ugly, but it's private, and I don't see a cleaner way to
879 simplify the two-headed public interface of do_openn. */
880static bool
881S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname,
882 PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype,
7e30e49f 883 int writing, bool was_fdopen, const char *type, Stat_t *statbufp)
a6fc70e5
NC		 884{
885 int fd;
7e30e49f 886 Stat_t statbuf;
a6fc70e5
NC		 887
888 PERL_ARGS_ASSERT_OPENN_CLEANUP;
889
b1234259
JH		 890 Zero(&statbuf, 1, Stat_t);
891
bee1dbe2 892 if (!fp) {
ce44635a 893 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
7cb3f959 894 && should_warn_nl(oname)
ce44635a 895
041457d9 896 )
5d37acd6 897 {
7347ee54 898 GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
9014280d 899 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
7347ee54 900 GCC_DIAG_RESTORE_STMT;
5d37acd6 901 }
6e21c824 902 goto say_false;
bee1dbe2 903 }
a00b5bd3
NIS		 904
905 if (ckWARN(WARN_IO)) {
906 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
907 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 908 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 909 "Filehandle STD%s reopened as %" HEKf
d0c0e7dd 910 " only for input",
97828cef 911 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
d0c0e7dd 912 HEKfARG(GvENAME_HEK(gv)));
a00b5bd3 913 }
ee518936 914 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 915 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 916 "Filehandle STDIN reopened as %" HEKf " only for output",
d0c0e7dd
FC		 917 HEKfARG(GvENAME_HEK(gv))
918 );
a00b5bd3
NIS		 919 }
920 }
921
e99cca91 922 fd = PerlIO_fileno(fp);
375ed12a
JH		 923 /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no
924 * fd assume it isn't a socket - this covers PerlIO::scalar -
925 * otherwise unless we "know" the type probe for socket-ness.
e99cca91
NIS		 926 */
927 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
7e30e49f 928 if (PerlLIO_fstat(fd,&statbuf) < 0) {
e99cca91
NIS		 929 /* If PerlIO claims to have fd we had better be able to fstat() it. */
930 (void) PerlIO_close(fp);
6e21c824 931 goto say_false;
a687059c 932 }
7114a2d2 933#ifndef PERL_MICRO
7e30e49f 934 if (S_ISSOCK(statbuf.st_mode))
50952442 935 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW		 936#ifdef HAS_SOCKET
937 else if (
7e30e49f 938 !(statbuf.st_mode & S_IFMT)
0759c907
JH		 939 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
940 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
941 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS		 942 char tmpbuf[256];
943 Sock_size_t buflen = sizeof tmpbuf;
944 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
945 || errno != ENOTSOCK)
946 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
947 /* but some return 0 for streams too, sigh */
99b89507 948 }
e99cca91 949#endif /* HAS_SOCKET */
7114a2d2 950#endif /* !PERL_MICRO */
a687059c 951 }
e99cca91
NIS		 952
953 /* Eeek - FIXME !!!
954 * If this is a standard handle we discard all the layer stuff
955 * and just dup the fd into whatever was on the handle before !
956 */
957
6e21c824 958 if (saveifp) { /* must use old fp? */
f5b9d040 959 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 960 then dup the new fileno down
f5b9d040 961 */
6e21c824 962 if (saveofp) {
f5b9d040 963 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 964 if (saveofp != saveifp) { /* was a socket? */
760ac839 965 PerlIO_close(saveofp);
6e21c824
LW		 966 }
967 }
6e60e805 968 if (savefd != fd) {
e934609f 969 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS		 970 is assigned to (say) STDOUT - for now let dup2() fail
971 and provide the error
972 */
375ed12a
JH		 973 if (fd < 0) {
974 SETERRNO(EBADF,RMS_IFI);
975 goto say_false;
976 } else if (PerlLIO_dup2(fd, savefd) < 0) {
bd4a5668
NIS		 977 (void)PerlIO_close(fp);
978 goto say_false;
979 }
d082dcd6 980#ifdef VMS
6e60e805 981 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS		 982 char newname[FILENAME_MAX+1];
983 if (PerlIO_getname(fp, newname)) {
984 if (fd == PerlIO_fileno(PerlIO_stdout()))
0db50132 985 vmssetuserlnm("SYS$OUTPUT", newname);
d0e2cf63 986 if (fd == PerlIO_fileno(PerlIO_stderr()))
0db50132 987 vmssetuserlnm("SYS$ERROR", newname);
d0e2cf63 988 }
d082dcd6
JH		 989 }
990#endif
d0e2cf63
AMS		 991
992#if !defined(WIN32)
993 /* PL_fdpid isn't used on Windows, so avoid this useless work.
994 * XXX Probably the same for a lot of other places. */
995 {
996 Pid_t pid;
997 SV *sv;
998
d0e2cf63 999 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 1000 SvUPGRADE(sv, SVt_IV);
d0e2cf63 1001 pid = SvIVX(sv);
45977657 1002 SvIV_set(sv, 0);
d0e2cf63 1003 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 1004 SvUPGRADE(sv, SVt_IV);
45977657 1005 SvIV_set(sv, pid);
d0e2cf63
AMS		 1006 }
1007#endif
1008
e212fc47
AMS		 1009 if (was_fdopen) {
1010 /* need to close fp without closing underlying fd */
1011 int ofd = PerlIO_fileno(fp);
884fc2d3 1012 int dupfd = ofd >= 0 ? PerlLIO_dup_cloexec(ofd) : -1;
375ed12a
JH		 1013 if (ofd < 0 || dupfd < 0) {
1014 if (dupfd >= 0)
1015 PerlLIO_close(dupfd);
1016 goto say_false;
1017 }
e212fc47 1018 PerlIO_close(fp);
884fc2d3
Z		 1019 PerlLIO_dup2_cloexec(dupfd, ofd);
1020 setfd_inhexec_for_sysfd(ofd);
e212fc47 1021 PerlLIO_close(dupfd);
ecdeb87c 1022 }
e212fc47
AMS		 1023 else
1024 PerlIO_close(fp);
6e21c824
LW		 1025 }
1026 fp = saveifp;
760ac839 1027 PerlIO_clearerr(fp);
e99cca91 1028 fd = PerlIO_fileno(fp);
6e21c824 1029 }
8990e307 1030 IoIFP(io) = fp;
b931b1d9 1031
684bef36 1032 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 1033 if (writing) {
50952442 1034 if (IoTYPE(io) == IoTYPE_SOCKET
7e30e49f 1035 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(statbuf.st_mode)) ) {
a33cf58c 1036 char *s = mode;
3b6c1aba
JH		 1037 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
1038 s++;
a33cf58c 1039 *s = 'w';
7c491510 1040 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) {
760ac839 1041 PerlIO_close(fp);
6e21c824 1042 goto say_false;
fe14fcc3 1043 }
1462b684
LW		 1044 }
1045 else
8990e307 1046 IoOFP(io) = fp;
bf38876a 1047 }
7e30e49f
DIM		 1048 if (statbufp)
1049 *statbufp = statbuf;
1050
a687059c 1051 return TRUE;
6e21c824 1052
7b52d656 1053 say_false:
8990e307
LW		 1054 IoIFP(io) = saveifp;
1055 IoOFP(io) = saveofp;
1056 IoTYPE(io) = savetype;
6e21c824 1057 return FALSE;
a687059c
LW		 1058}
1059
e0d4aead
TC		 1060/* Open a temp file in the same directory as an original name.
1061*/
1062
1063static bool
1064S_openindirtemp(pTHX_ GV *gv, SV *orig_name, SV *temp_out_name) {
1065 int fd;
1066 PerlIO *fp;
1067 const char *p = SvPV_nolen(orig_name);
1068 const char *sep;
1069
1070 /* look for the last directory separator */
1071 sep = strrchr(p, '/');
1072
1073#ifdef DOSISH
1074 {
1075 const char *sep2;
1076 if ((sep2 = strrchr(sep ? sep : p, '\\')))
1077 sep = sep2;
1078 }
1079#endif
1080#ifdef VMS
1081 if (!sep) {
1082 const char *openp = strchr(p, '[');
1083 if (openp)
1084 sep = strchr(openp, ']');
1085 else {
1086 sep = strchr(p, ':');
1087 }
1088 }
1089#endif
1090 if (sep) {
1091 sv_setpvn(temp_out_name, p, sep - p + 1);
1092 sv_catpvs(temp_out_name, "XXXXXXXX");
1093 }
1094 else
1095 sv_setpvs(temp_out_name, "XXXXXXXX");
1096
026633c6
JH		 1097 {
1098 int old_umask = umask(0177);
884fc2d3 1099 fd = Perl_my_mkstemp_cloexec(SvPVX(temp_out_name));
026633c6
JH		 1100 umask(old_umask);
1101 }
e0d4aead
TC		 1102
1103 if (fd < 0)
1104 return FALSE;
1105
1106 fp = PerlIO_fdopen(fd, "w+");
1107 if (!fp)
1108 return FALSE;
1109
1110 return do_openn(gv, "+>&", 3, 0, 0, 0, fp, NULL, 0);
1111}
1112
733612e0 1113#if defined(HAS_UNLINKAT) && defined(HAS_RENAMEAT) && defined(HAS_FCHMODAT) && \
c3fcee07
JK		 1114 (defined(HAS_DIRFD) || defined(HAS_DIR_DD_FD)) && !defined(NO_USE_ATFUNCTIONS) && \
1115 defined(HAS_LINKAT)
733612e0
TC		 1116# define ARGV_USE_ATFUNCTIONS
1117#endif
1118
1b4d0d79
TC		 1119/* Win32 doesn't necessarily return useful information
1120 * in st_dev, st_ino.
1121 */
184f90dc
TC		 1122#ifndef DOSISH
1123# define ARGV_USE_STAT_INO
1b4d0d79
TC		 1124#endif
1125
e0d4aead
TC		 1126#define ARGVMG_BACKUP_NAME 0
1127#define ARGVMG_TEMP_NAME 1
1128#define ARGVMG_ORIG_NAME 2
1129#define ARGVMG_ORIG_MODE 3
05df5c88 1130#define ARGVMG_ORIG_PID 4
bb082417 1131
bb082417
TC		 1132/* we store the entire stat_t since the ino_t and dev_t values might
1133 not fit in an IV. I could have created a new structure and
1134 transferred them across, but this seemed too much effort for very
1135 little win.
184f90dc
TC		 1136
1137 We store it even when the *at() functions are available, since
1138 while the C runtime might have definitions for these functions, the
1139 operating system or a specific filesystem might not implement them.
1140 eg. NetBSD 6 implements linkat() but only where the fds are AT_FDCWD.
bb082417 1141 */
184f90dc
TC		 1142#ifdef ARGV_USE_STAT_INO
1143# define ARGVMG_ORIG_CWD_STAT 5
1144#endif
1145
1146#ifdef ARGV_USE_ATFUNCTIONS
1147# define ARGVMG_ORIG_DIRP 6
1148#endif
1149
1150#ifdef ENOTSUP
1151#define NotSupported(e) ((e) == ENOSYS || (e) == ENOTSUP)
1152#else
1153#define NotSupported(e) ((e) == ENOSYS)
bb082417 1154#endif
e0d4aead
TC		 1155
1156static int
d0405818 1157S_argvout_free(pTHX_ SV *io, MAGIC *mg) {
d0405818 1158 PERL_UNUSED_ARG(io);
e0d4aead
TC		 1159
1160 /* note this can be entered once the file has been
1161 successfully deleted too */
d0405818
TC		 1162 assert(IoTYPE(io) != IoTYPE_PIPE);
1163
8ab93df0
TC		 1164 /* mg_obj can be NULL if a thread is created with the handle open, in which
1165 case we leave any clean up to the parent thread */
3d5e9c11 1166 if (mg->mg_obj) {
733612e0
TC		 1167#ifdef ARGV_USE_ATFUNCTIONS
1168 SV **dir_psv;
1169 DIR *dir;
3d5e9c11
TC		 1170
1171 dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE);
1172 assert(dir_psv && *dir_psv && SvIOK(*dir_psv));
1173 dir = INT2PTR(DIR *, SvIV(*dir_psv));
733612e0 1174#endif
3d5e9c11
TC		 1175 if (IoIFP(io)) {
1176 SV **pid_psv;
1177 PerlIO *iop = IoIFP(io);
05df5c88 1178
3d5e9c11 1179 assert(SvTYPE(mg->mg_obj) == SVt_PVAV);
05df5c88 1180
3d5e9c11 1181 pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE);
05df5c88 1182
3d5e9c11 1183 assert(pid_psv && *pid_psv);
05df5c88 1184
3d5e9c11
TC		 1185 if (SvIV(*pid_psv) == (IV)PerlProc_getpid()) {
1186 /* if we get here the file hasn't been closed explicitly by the
1187 user and hadn't been closed implicitly by nextargv(), so
1188 abandon the edit */
1189 SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
1190 const char *temp_pv = SvPVX(*temp_psv);
184f90dc 1191
3d5e9c11
TC		 1192 assert(temp_psv && *temp_psv && SvPOK(*temp_psv));
1193 (void)PerlIO_close(iop);
1194 IoIFP(io) = IoOFP(io) = NULL;
733612e0 1195#ifdef ARGV_USE_ATFUNCTIONS
3d5e9c11
TC		 1196 if (dir) {
1197 if (unlinkat(my_dirfd(dir), temp_pv, 0) < 0 &&
1198 NotSupported(errno))
1199 (void)UNLINK(temp_pv);
1200 }
733612e0 1201#else
3d5e9c11 1202 (void)UNLINK(temp_pv);
733612e0 1203#endif
3d5e9c11 1204 }
05df5c88 1205 }
3d5e9c11
TC		 1206#ifdef ARGV_USE_ATFUNCTIONS
1207 if (dir)
1208 closedir(dir);
1209#endif
e0d4aead
TC		 1210 }
1211
1212 return 0;
1213}
1214
8ab93df0
TC		 1215static int
1216S_argvout_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1217 PERL_UNUSED_ARG(param);
1218
1219 /* ideally we could just remove the magic from the SV but we don't get the SV here */
1220 SvREFCNT_dec(mg->mg_obj);
1221 mg->mg_obj = NULL;
1222
1223 return 0;
1224}
1225
e0d4aead
TC		 1226/* Magic of this type has an AV containing the following:
1227 0: name of the backup file (if any)
1228 1: name of the temp output file
1229 2: name of the original file
1230 3: file mode of the original file
05df5c88
TC		 1231 4: pid of the process we opened at, to prevent doing the renaming
1232 etc in both the child and the parent after a fork
733612e0 1233
184f90dc
TC		 1234If we have useful inode/device ids in stat_t we also keep:
1235 5: a stat of the original current working directory
1236
733612e0 1237If we have unlinkat(), renameat(), fchmodat(), dirfd() we also keep:
184f90dc 1238 6: the DIR * for the current directory when we open the file, stored as an IV
e0d4aead
TC		 1239 */
1240
1241static const MGVTBL argvout_vtbl =
1242 {
1243 NULL, /* svt_get */
1244 NULL, /* svt_set */
1245 NULL, /* svt_len */
1246 NULL, /* svt_clear */
1247 S_argvout_free, /* svt_free */
1248 NULL, /* svt_copy */
8ab93df0
TC		 1249 S_argvout_dup, /* svt_dup */
1250 NULL /* svt_local */
e0d4aead
TC		 1251 };
1252
760ac839 1253PerlIO *
157fb5a1 1254Perl_nextargv(pTHX_ GV *gv, bool nomagicopen)
a687059c 1255{
2d03de9c 1256 IO * const io = GvIOp(gv);
502aca56 1257 SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL;
fe14fcc3 1258
7918f24d
NC		 1259 PERL_ARGS_ASSERT_NEXTARGV;
1260
502aca56
TC		 1261 if (old_out_name)
1262 SAVEFREESV(old_out_name);
1263
3280af22 1264 if (!PL_argvoutgv)
fafc274c 1265 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
5513c2cf 1266 if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) {
18708f5a 1267 IoFLAGS(io) &= ~IOf_START;
7a1c5554 1268 if (PL_inplace) {
294b3b39 1269 assert(PL_defoutgv);
29a861e7
NC		 1270 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
1271 SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 1272 }
18708f5a 1273 }
e0d4aead
TC		 1274
1275 {
1276 IO * const io = GvIOp(PL_argvoutgv);
1277 if (io && IoIFP(io) && old_out_name) {
1278 do_close(PL_argvoutgv, FALSE);
1279 }
fe14fcc3 1280 }
e0d4aead 1281
c797f2d8 1282 PL_lastfd = -1;
3280af22 1283 PL_filemode = 0;
5c501b37 1284 if (!GvAV(gv))
4608196e 1285 return NULL;
b9f2b683 1286 while (av_tindex(GvAV(gv)) >= 0) {
85aff577 1287 STRLEN oldlen;
1fa0529f 1288 SV *const sv = av_shift(GvAV(gv));
8990e307 1289 SAVEFREESV(sv);
4bac9ae4 1290 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
e203899d 1291 sv_setsv(GvSVn(gv),sv);
79072805 1292 SvSETMAGIC(GvSV(gv));
3280af22 1293 PL_oldname = SvPVx(GvSV(gv), oldlen);
d8015975 1294 if (LIKELY(!PL_inplace)) {
157fb5a1
RGS		 1295 if (nomagicopen
1296 ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1)
1297 : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)
1298 ) {
d8015975
NC		 1299 return IoIFP(GvIOp(gv));
1300 }
1301 }
1302 else {
7e30e49f 1303 Stat_t statbuf;
d8015975
NC		 1304 /* This very long block ends with return IoIFP(GvIOp(gv));
1305 Both this block and the block above fall through on open
1306 failure to the warning code, and then the while loop above tries
1307 the next entry. */
7e30e49f 1308 if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0, &statbuf)) {
1fa0529f
NC		 1309#ifndef FLEXFILENAMES
1310 int filedev;
1311 int fileino;
1312#endif
733612e0
TC		 1313#ifdef ARGV_USE_ATFUNCTIONS
1314 DIR *curdir;
1315#endif
1fa0529f
NC		 1316 Uid_t fileuid;
1317 Gid_t filegid;
e0d4aead
TC		 1318 AV *magic_av = NULL;
1319 SV *temp_name_sv = NULL;
8ab93df0 1320 MAGIC *mg;
1fa0529f 1321
79072805 1322 TAINT_PROPER("inplace open");
3280af22 1323 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC		 1324 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
1325 SVt_PVIO));
a0d0e21e 1326 return IoIFP(GvIOp(gv));
c623bd54 1327 }
99b89507 1328#ifndef FLEXFILENAMES
7e30e49f
DIM		 1329 filedev = statbuf.st_dev;
1330 fileino = statbuf.st_ino;
99b89507 1331#endif
7e30e49f
DIM		 1332 PL_filemode = statbuf.st_mode;
1333 fileuid = statbuf.st_uid;
1334 filegid = statbuf.st_gid;
3280af22 1335 if (!S_ISREG(PL_filemode)) {
9b387841
NC		 1336 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
1337 "Can't do inplace edit: %s is not a regular file",
1338 PL_oldname );
79072805 1339 do_close(gv,FALSE);
c623bd54
LW		 1340 continue;
1341 }
e0d4aead 1342 magic_av = newAV();
c9930541 1343 if (*PL_inplace && strNE(PL_inplace, "*")) {
2d03de9c 1344 const char *star = strchr(PL_inplace, '*');
2d259d92 1345 if (star) {
2d03de9c 1346 const char *begin = PL_inplace;
8062ff11 1347 SvPVCLEAR(sv);
2d259d92
CK		 1348 do {
1349 sv_catpvn(sv, begin, star - begin);
3280af22 1350 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK		 1351 begin = ++star;
1352 } while ((star = strchr(begin, '*')));
3d66d7bb
GS		 1353 if (*begin)
1354 sv_catpv(sv,begin);
2d259d92
CK		 1355 }
1356 else {
3280af22 1357 sv_catpv(sv,PL_inplace);
2d259d92 1358 }
c623bd54 1359#ifndef FLEXFILENAMES
7e30e49f
DIM		 1360 if ((PerlLIO_stat(SvPVX_const(sv),&statbuf) >= 0
1361 && statbuf.st_dev == filedev
1362 && statbuf.st_ino == fileino)
39e571d4 1363#ifdef DJGPP
5f74f29c 1364 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 1365#endif
f248d071
GS		 1366 )
1367 {
9b387841 1368 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
147e3846
KW		 1369 "Can't do inplace edit: %"
1370 SVf " would not be unique",
9b387841 1371 SVfARG(sv));
e0d4aead 1372 goto cleanup_argv;
c623bd54 1373 }
ff8e2863 1374#endif
e0d4aead 1375 av_store(magic_av, ARGVMG_BACKUP_NAME, newSVsv(sv));
a687059c
LW		 1376 }
1377
30fc4309 1378 sv_setpvn(sv,PL_oldname,oldlen);
748a9306 1379 SETERRNO(0,0); /* in case sprintf set errno */
e0d4aead
TC		 1380 temp_name_sv = newSV(0);
1381 if (!S_openindirtemp(aTHX_ PL_argvoutgv, GvSV(gv), temp_name_sv)) {
1382 SvREFCNT_dec(temp_name_sv);
1383 /* diag_listed_as: Can't do inplace edit on %s: %s */
1384 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: Cannot make temp name: %s",
9b387841 1385 PL_oldname, Strerror(errno) );
e0d4aead
TC		 1386#ifndef FLEXFILENAMES
1387 cleanup_argv:
1388#endif
1389 do_close(gv,FALSE);
1390 SvREFCNT_dec(magic_av);
1391 continue;
fe14fcc3 1392 }
e0d4aead
TC		 1393 av_store(magic_av, ARGVMG_TEMP_NAME, temp_name_sv);
1394 av_store(magic_av, ARGVMG_ORIG_NAME, newSVsv(sv));
1395 av_store(magic_av, ARGVMG_ORIG_MODE, newSVuv(PL_filemode));
05df5c88 1396 av_store(magic_av, ARGVMG_ORIG_PID, newSViv((IV)PerlProc_getpid()));
1b4d0d79 1397#if defined(ARGV_USE_ATFUNCTIONS)
733612e0
TC		 1398 curdir = opendir(".");
1399 av_store(magic_av, ARGVMG_ORIG_DIRP, newSViv(PTR2IV(curdir)));
1b4d0d79 1400#elif defined(ARGV_USE_STAT_INO)
bb082417
TC		 1401 if (PerlLIO_stat(".", &statbuf) >= 0) {
1402 av_store(magic_av, ARGVMG_ORIG_CWD_STAT,
1403 newSVpvn((char *)&statbuf, sizeof(statbuf)));
1404 }
733612e0 1405#endif
3280af22 1406 setdefout(PL_argvoutgv);
dddabd86 1407 sv_setsv(GvSVn(PL_argvoutgv), temp_name_sv);
8ab93df0
TC		 1408 mg = sv_magicext((SV*)GvIOp(PL_argvoutgv), (SV*)magic_av, PERL_MAGIC_uvar, &argvout_vtbl, NULL, 0);
1409 mg->mg_flags |= MGf_DUP;
e0d4aead 1410 SvREFCNT_dec(magic_av);
3280af22 1411 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
375ed12a 1412 if (PL_lastfd >= 0) {
45a23732 1413 (void)PerlLIO_fstat(PL_lastfd,&statbuf);
fe14fcc3 1414#ifdef HAS_FCHMOD
375ed12a 1415 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 1416#else
375ed12a 1417 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
a687059c 1418#endif
45a23732 1419 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
b469f1e0 1420 /* XXX silently ignore failures */
fe14fcc3 1421#ifdef HAS_FCHOWN
b469f1e0 1422 PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid));
4009c3ff 1423#elif defined(HAS_CHOWN)
b469f1e0 1424 PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid));
a687059c 1425#endif
375ed12a 1426 }
fe14fcc3 1427 }
d8015975 1428 return IoIFP(GvIOp(gv));
a687059c 1429 }
d8015975
NC		 1430 } /* successful do_open_raw(), PL_inplace non-NULL */
1431
1432 if (ckWARN_d(WARN_INPLACE)) {
1433 const int eno = errno;
7e30e49f 1434 Stat_t statbuf;
45a23732
DD		 1435 if (PerlLIO_stat(PL_oldname, &statbuf) >= 0
1436 && !S_ISREG(statbuf.st_mode)) {
d8015975
NC		 1437 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
1438 "Can't do inplace edit: %s is not a regular file",
1439 PL_oldname);
1440 }
1441 else {
1442 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
1443 PL_oldname, Strerror(eno));
1444 }
4d61ec05 1445 }
a687059c 1446 }
18708f5a
GS		 1447 if (io && (IoFLAGS(io) & IOf_ARGV))
1448 IoFLAGS(io) |= IOf_START;
3280af22 1449 if (PL_inplace) {
7a1c5554
GS		 1450 if (io && (IoFLAGS(io) & IOf_ARGV)
1451 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
1452 {
159b6efe 1453 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
18708f5a 1454 setdefout(oldout);
8e217d4a 1455 SvREFCNT_dec_NN(oldout);
4608196e 1456 return NULL;
18708f5a 1457 }
fafc274c 1458 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 1459 }
4608196e 1460 return NULL;
a687059c
LW		 1461}
1462
84dbe61c 1463#ifdef ARGV_USE_ATFUNCTIONS
a3c63a94 1464# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
84dbe61c
TC		 1465
1466/* FreeBSD 11 renameat() mis-behaves strangely with absolute paths in cases where the
1467 * equivalent rename() succeeds
1468 */
1469static int
1470S_my_renameat(int olddfd, const char *oldpath, int newdfd, const char *newpath) {
1471 /* this is intended only for use in Perl_do_close() */
1472 assert(olddfd == newdfd);
1473 assert(PERL_FILE_IS_ABSOLUTE(oldpath) == PERL_FILE_IS_ABSOLUTE(newpath));
1474 if (PERL_FILE_IS_ABSOLUTE(oldpath)) {
1475 return PerlLIO_rename(oldpath, newpath);
1476 }
1477 else {
1478 return renameat(olddfd, oldpath, newdfd, newpath);
1479 }
1480}
1481
1482# else
1483# define S_my_renameat(dh1, pv1, dh2, pv2) renameat((dh1), (pv1), (dh2), (pv2))
a3c63a94 1484# endif /* if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */
84dbe61c
TC		 1485#endif
1486
184f90dc 1487static bool
848643a9 1488S_dir_unchanged(pTHX_ const char *orig_pv, MAGIC *mg) {
184f90dc
TC		 1489 Stat_t statbuf;
1490
1491#ifdef ARGV_USE_STAT_INO
1492 SV **stat_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_CWD_STAT, FALSE);
1493 Stat_t *orig_cwd_stat = stat_psv && *stat_psv ? (Stat_t *)SvPVX(*stat_psv) : NULL;
1494
1495 /* if the path is absolute the possible moving of cwd (which the file
1496 might be in) isn't our problem.
1497 This code tries to be reasonably balanced about detecting a changed
1498 CWD, if we have the information needed to check that curdir has changed, we
1499 check it
1500 */
1501 if (!PERL_FILE_IS_ABSOLUTE(orig_pv)
1502 && orig_cwd_stat
1503 && PerlLIO_stat(".", &statbuf) >= 0
1504 && ( statbuf.st_dev != orig_cwd_stat->st_dev
1505 || statbuf.st_ino != orig_cwd_stat->st_ino)) {
1506 Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s",
1507 orig_pv, "Current directory has changed");
1508 }
1509#else
1510 SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
1511
1512 /* Some platforms don't have useful st_ino etc, so just
1513 check we can see the work file.
1514 */
1515 if (!PERL_FILE_IS_ABSOLUTE(orig_pv)
1516 && PerlLIO_stat(SvPVX(*temp_psv), &statbuf) < 0) {
3c67ad9b 1517 Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s",
a06de4dc 1518 orig_pv,
184f90dc
TC		 1519 "Work file is missing - did you change directory?");
1520 }
1521#endif
1522
1523 return TRUE;
1524}
1525
848643a9
TC		 1526#define dir_unchanged(orig_psv, mg) \
1527 S_dir_unchanged(aTHX_ (orig_psv), (mg))
184f90dc 1528
517844ec 1529/* explicit renamed to avoid C++ conflict -- kja */
a687059c 1530bool
864dbfa3 1531Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 1532{
1193dd27
IZ		 1533 bool retval;
1534 IO *io;
e0d4aead 1535 MAGIC *mg;
a687059c 1536
79072805 1537 if (!gv)
3280af22 1538 gv = PL_argvgv;
6e592b3a 1539 if (!gv || !isGV_with_GP(gv)) {
1d2dff63 1540 if (not_implicit)
93189314 1541 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 1542 return FALSE;
99b89507 1543 }
79072805
LW		 1544 io = GvIO(gv);
1545 if (!io) { /* never opened */
1d2dff63 1546 if (not_implicit) {
51087808 1547 report_evil_fh(gv);
93189314 1548 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 1549 }
a687059c
LW		 1550 return FALSE;
1551 }
e0d4aead
TC		 1552 if ((mg = mg_findext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl))
1553 && mg->mg_obj) {
1554 /* handle to an in-place edit work file */
1555 SV **back_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_BACKUP_NAME, FALSE);
1556 SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
1557 /* PL_oldname may have been modified by a nested ARGV use at this point */
1558 SV **orig_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_NAME, FALSE);
1559 SV **mode_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_MODE, FALSE);
05df5c88 1560 SV **pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE);
1b4d0d79 1561#if defined(ARGV_USE_ATFUNCTIONS)
05df5c88 1562 SV **dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE);
733612e0
TC		 1563 DIR *dir;
1564 int dfd;
1b4d0d79 1565#endif
e0d4aead
TC		 1566 UV mode;
1567 int fd;
1568
1569 const char *orig_pv;
1570
1571 assert(temp_psv && *temp_psv);
1572 assert(orig_psv && *orig_psv);
1573 assert(mode_psv && *mode_psv);
05df5c88 1574 assert(pid_psv && *pid_psv);
733612e0
TC		 1575#ifdef ARGV_USE_ATFUNCTIONS
1576 assert(dir_psv && *dir_psv);
1577 dir = INT2PTR(DIR *, SvIVX(*dir_psv));
1578 dfd = my_dirfd(dir);
1579#endif
e0d4aead
TC		 1580
1581 orig_pv = SvPVX(*orig_psv);
e0d4aead
TC		 1582 mode = SvUV(*mode_psv);
1583
1584 if ((mode & (S_ISUID|S_ISGID)) != 0
1585 && (fd = PerlIO_fileno(IoIFP(io))) >= 0) {
1586 (void)PerlIO_flush(IoIFP(io));
1587#ifdef HAS_FCHMOD
1588 (void)fchmod(fd, mode);
1589#else
1590 (void)PerlLIO_chmod(orig_pv, mode);
1591#endif
1592 }
1593
1594 retval = io_close(io, NULL, not_implicit, FALSE);
1595
05df5c88
TC		 1596 if (SvIV(*pid_psv) != (IV)PerlProc_getpid()) {
1597 /* this is a child process, don't duplicate our rename() etc
1598 processing below */
1599 goto freext;
1600 }
1601
e0d4aead
TC		 1602 if (retval) {
1603#if defined(DOSISH) || defined(__CYGWIN__)
1604 if (PL_argvgv && GvIOp(PL_argvgv)
1605 && IoIFP(GvIOp(PL_argvgv))
1606 && (IoFLAGS(GvIOp(PL_argvgv)) & (IOf_ARGV|IOf_START)) == IOf_ARGV) {
1607 do_close(PL_argvgv, FALSE);
1608 }
1609#endif
184f90dc 1610#ifndef ARGV_USE_ATFUNCTIONS
848643a9 1611 if (!dir_unchanged(orig_pv, mg))
184f90dc
TC		 1612 goto abort_inplace;
1613#endif
e0d4aead
TC		 1614 if (back_psv && *back_psv) {
1615#if defined(HAS_LINK) && !defined(DOSISH) && !defined(__CYGWIN__) && defined(HAS_RENAME)
733612e0
TC		 1616 if (
1617# ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1618 linkat(dfd, orig_pv, dfd, SvPVX(*back_psv), 0) < 0 &&
1619 !(UNLIKELY(NotSupported(errno)) &&
848643a9 1620 dir_unchanged(orig_pv, mg) &&
184f90dc 1621 link(orig_pv, SvPVX(*back_psv)) == 0)
733612e0
TC		 1622# else
1623 link(orig_pv, SvPVX(*back_psv)) < 0
1624# endif
1625 )
e0d4aead
TC		 1626#endif
1627 {
1628#ifdef HAS_RENAME
733612e0
TC		 1629 if (
1630# ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1631 S_my_renameat(dfd, orig_pv, dfd, SvPVX(*back_psv)) < 0 &&
1632 !(UNLIKELY(NotSupported(errno)) &&
848643a9 1633 dir_unchanged(orig_pv, mg) &&
184f90dc 1634 PerlLIO_rename(orig_pv, SvPVX(*back_psv)) == 0)
733612e0
TC		 1635# else
1636 PerlLIO_rename(orig_pv, SvPVX(*back_psv)) < 0
1637# endif
1638 ) {
e0d4aead 1639 if (!not_implicit) {
83419aa9 1640# ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1641 if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 &&
1642 UNLIKELY(NotSupported(errno)) &&
848643a9 1643 dir_unchanged(orig_pv, mg))
184f90dc 1644 (void)UNLINK(SvPVX_const(*temp_psv));
83419aa9
TC		 1645# else
1646 UNLINK(SvPVX(*temp_psv));
1647# endif
e0d4aead
TC		 1648 Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file",
1649 SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno));
1650 }
1651 /* should we warn here? */
1652 goto abort_inplace;
1653 }
1654#else
1655 (void)UNLINK(SvPVX(*back_psv));
1656 if (link(orig_pv, SvPVX(*back_psv))) {
1657 if (!not_implicit) {
1658 Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file",
1659 SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno));
1660 }
1661 goto abort_inplace;
1662 }
1663 /* we need to use link() to get the temp into place too, and linK()
1664 fails if the new link name exists */
1665 (void)UNLINK(orig_pv);
1666#endif
1667 }
1668 }
1669#if defined(DOSISH) || defined(__CYGWIN__) || !defined(HAS_RENAME)
1670 else {
1671 UNLINK(orig_pv);
1672 }
1673#endif
1674 if (
4009c3ff
AC		 1675#if !defined(HAS_RENAME)
1676 link(SvPVX(*temp_psv), orig_pv) < 0
1677#elif defined(ARGV_USE_ATFUNCTIONS)
184f90dc
TC		 1678 S_my_renameat(dfd, SvPVX(*temp_psv), dfd, orig_pv) < 0 &&
1679 !(UNLIKELY(NotSupported(errno)) &&
848643a9 1680 dir_unchanged(orig_pv, mg) &&
184f90dc 1681 PerlLIO_rename(SvPVX(*temp_psv), orig_pv) == 0)
e0d4aead 1682#else
4009c3ff 1683 PerlLIO_rename(SvPVX(*temp_psv), orig_pv) < 0
e0d4aead
TC		 1684#endif
1685 ) {
1686 if (!not_implicit) {
dddabd86 1687#ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1688 if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 &&
1689 NotSupported(errno))
1690 UNLINK(SvPVX(*temp_psv));
dddabd86
TC		 1691#else
1692 UNLINK(SvPVX(*temp_psv));
1693#endif
3c67ad9b
TC		 1694 /* diag_listed_as: Cannot complete in-place edit of %s: %s */
1695 Perl_croak(aTHX_ "Cannot complete in-place edit of %s: failed to rename work file '%s' to '%s': %s",
1696 orig_pv, SvPVX(*temp_psv), orig_pv, Strerror(errno));
e0d4aead
TC		 1697 }
1698 abort_inplace:
1699 UNLINK(SvPVX_const(*temp_psv));
1700 retval = FALSE;
1701 }
1702#ifndef HAS_RENAME
1703 UNLINK(SvPVX(*temp_psv));
1704#endif
1705 }
1706 else {
733612e0 1707#ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1708 if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) &&
1709 NotSupported(errno))
1710 UNLINK(SvPVX_const(*temp_psv));
1711
733612e0 1712#else
e0d4aead 1713 UNLINK(SvPVX_const(*temp_psv));
733612e0 1714#endif
e0d4aead
TC		 1715 if (!not_implicit) {
1716 Perl_croak(aTHX_ "Failed to close in-place work file %s: %s",
1717 SvPVX(*temp_psv), Strerror(errno));
1718 }
1719 }
05df5c88 1720 freext:
e0d4aead
TC		 1721 mg_freeext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl);
1722 }
1723 else {
1724 retval = io_close(io, NULL, not_implicit, FALSE);
1725 }
517844ec 1726 if (not_implicit) {
1193dd27
IZ		 1727 IoLINES(io) = 0;
1728 IoPAGE(io) = 0;
1729 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1730 }
50952442 1731 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ		 1732 return retval;
1733}
1734
1735bool
96d7c888 1736Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail)
1193dd27
IZ		 1737{
1738 bool retval = FALSE;
1193dd27 1739
7918f24d
NC		 1740 PERL_ARGS_ASSERT_IO_CLOSE;
1741
8990e307 1742 if (IoIFP(io)) {
50952442 1743 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 1744 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 1745 if (not_implicit) {
37038d91 1746 STATUS_NATIVE_CHILD_SET(status);
e5218da5 1747 retval = (STATUS_UNIX == 0);
f2b5be74
GS		 1748 }
1749 else {
1750 retval = (status != -1);
1751 }
a687059c 1752 }
50952442 1753 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW		 1754 retval = TRUE;
1755 else {
8990e307 1756 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 1757 const bool prev_err = PerlIO_error(IoOFP(io));
f4725fad
FC		 1758#ifdef USE_PERLIO
1759 if (prev_err)
1760 PerlIO_restore_errno(IoOFP(io));
1761#endif
e199e3be 1762 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 1763 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 1764 }
e199e3be 1765 else {
0bcc34c2 1766 const bool prev_err = PerlIO_error(IoIFP(io));
f4725fad
FC		 1767#ifdef USE_PERLIO
1768 if (prev_err)
1769 PerlIO_restore_errno(IoIFP(io));
1770#endif
e199e3be
RGS		 1771 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1772 }
a687059c 1773 }
4608196e 1774 IoOFP(io) = IoIFP(io) = NULL;
96d7c888
FC		 1775
1776 if (warn_on_fail && !retval) {
1777 if (gv)
1778 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1779 "Warning: unable to close filehandle %"
147e3846 1780 HEKf " properly: %" SVf,
ac892e4a
DM		 1781 HEKfARG(GvNAME_HEK(gv)),
1782 SVfARG(get_sv("!",GV_ADD)));
96d7c888
FC		 1783 else
1784 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1785 "Warning: unable to close filehandle "
147e3846 1786 "properly: %" SVf,
ac892e4a 1787 SVfARG(get_sv("!",GV_ADD)));
96d7c888 1788 }
79072805 1789 }
f2b5be74 1790 else if (not_implicit) {
93189314 1791 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 1792 }
1193dd27 1793
a687059c
LW		 1794 return retval;
1795}
1796
1797bool
864dbfa3 1798Perl_do_eof(pTHX_ GV *gv)
a687059c 1799{
eb578fdb 1800 IO * const io = GvIO(gv);
a687059c 1801
7918f24d
NC		 1802 PERL_ARGS_ASSERT_DO_EOF;
1803
79072805 1804 if (!io)
a687059c 1805 return TRUE;
7716c5c5 1806 else if (IoTYPE(io) == IoTYPE_WRONLY)
a5390457 1807 report_wrongway_fh(gv, '>');
a687059c 1808
8990e307 1809 while (IoIFP(io)) {
760ac839 1810 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1811 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW		 1812 return FALSE; /* this is the most usual case */
1813 }
a687059c 1814
79852593
NC		 1815 {
1816 /* getc and ungetc can stomp on errno */
4ee39169 1817 dSAVE_ERRNO;
79852593
NC		 1818 const int ch = PerlIO_getc(IoIFP(io));
1819 if (ch != EOF) {
1820 (void)PerlIO_ungetc(IoIFP(io),ch);
4ee39169 1821 RESTORE_ERRNO;
79852593
NC		 1822 return FALSE;
1823 }
4ee39169 1824 RESTORE_ERRNO;
a687059c 1825 }
fab3f3a7 1826
760ac839 1827 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH		 1828 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1829 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1830 }
533c011a 1831 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
157fb5a1 1832 if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */
a687059c
LW		 1833 return TRUE;
1834 }
1835 else
1836 return TRUE; /* normal fp, definitely end of file */
1837 }
1838 return TRUE;
1839}
1840
5ff3f7a4 1841Off_t
864dbfa3 1842Perl_do_tell(pTHX_ GV *gv)
a687059c 1843{
9c9f25b8 1844 IO *const io = GvIO(gv);
eb578fdb 1845 PerlIO *fp;
a687059c 1846
7918f24d
NC		 1847 PERL_ARGS_ASSERT_DO_TELL;
1848
9c9f25b8 1849 if (io && (fp = IoIFP(io))) {
8903cb82 1850 return PerlIO_tell(fp);
96e4d5b1 1851 }
51087808 1852 report_evil_fh(gv);
93189314 1853 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1854 return (Off_t)-1;
a687059c
LW		 1855}
1856
1857bool
864dbfa3 1858Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1859{
9c9f25b8 1860 IO *const io = GvIO(gv);
eb578fdb 1861 PerlIO *fp;
a687059c 1862
9c9f25b8 1863 if (io && (fp = IoIFP(io))) {
8903cb82 1864 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1865 }
51087808 1866 report_evil_fh(gv);
93189314 1867 SETERRNO(EBADF,RMS_IFI);
a687059c
LW		 1868 return FALSE;
1869}
1870
97cc44eb 1871Off_t
864dbfa3 1872Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1873{
9c9f25b8 1874 IO *const io = GvIO(gv);
eb578fdb 1875 PerlIO *fp;
8903cb82 1876
7918f24d
NC		 1877 PERL_ARGS_ASSERT_DO_SYSSEEK;
1878
375ed12a
JH		 1879 if (io && (fp = IoIFP(io))) {
1880 int fd = PerlIO_fileno(fp);
07bd88da
JH		 1881 if (fd < 0 || (whence == SEEK_SET && pos < 0)) {
1882 SETERRNO(EINVAL,LIB_INVARG);
1883 return -1;
1884 } else {
375ed12a
JH		 1885 return PerlLIO_lseek(fd, pos, whence);
1886 }
1887 }
51087808 1888 report_evil_fh(gv);
93189314 1889 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1890 return (Off_t)-1;
8903cb82
PP		 1891}
1892
6ff81951 1893int
a79b25b7 1894Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
16fe6d59
GS		 1895{
1896 int mode = O_BINARY;
81611534 1897 PERL_UNUSED_CONTEXT;
a79b25b7 1898 if (s) {
16fe6d59
GS		 1899 while (*s) {
1900 if (*s == ':') {
1901 switch (s[1]) {
1902 case 'r':
e963d6d2 1903 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS		 1904 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1905 {
1906 mode = O_BINARY;
1907 s += 4;
1908 len -= 4;
1909 break;
1910 }
924ba076 1911 /* FALLTHROUGH */
16fe6d59 1912 case 'c':
e963d6d2 1913 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS		 1914 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1915 {
1916 mode = O_TEXT;
1917 s += 5;
1918 len -= 5;
1919 break;
1920 }
924ba076 1921 /* FALLTHROUGH */
16fe6d59
GS		 1922 default:
1923 goto fail_discipline;
1924 }
1925 }
1926 else if (isSPACE(*s)) {
1927 ++s;
1928 --len;
1929 }
1930 else {
4373e329 1931 const char *end;
7b52d656 1932 fail_discipline:
9a73c0b8 1933 end = (char *) memchr(s+1, ':', len);
16fe6d59
GS		 1934 if (!end)
1935 end = s+len;
60382766 1936#ifndef PERLIO_LAYERS
363c40c4 1937 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1938#else
18a33fb5 1939 len -= end-s;
60382766
NIS		 1940 s = end;
1941#endif
16fe6d59
GS		 1942 }
1943 }
1944 }
1945 return mode;
1946}
1947
58e24eff 1948#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH		 1949I32
1950my_chsize(int fd, Off_t length)
6eb13c3b 1951{
58e24eff
SH		 1952#ifdef F_FREESP
1953 /* code courtesy of William Kucharski */
1954#define HAS_CHSIZE
1955
c623ac67 1956 Stat_t filebuf;
6eb13c3b 1957
3028581b 1958 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW		 1959 return -1;
1960
1961 if (filebuf.st_size < length) {
1962
1963 /* extend file length */
1964
3028581b 1965 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW		 1966 return -1;
1967
1968 /* write a "0" byte */
1969
3028581b 1970 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW		 1971 return -1;
1972 }
1973 else {
1974 /* truncate length */
35da51f7 1975 struct flock fl;
6eb13c3b
LW		 1976 fl.l_whence = 0;
1977 fl.l_len = 0;
1978 fl.l_start = length;
a0d0e21e 1979 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW		 1980
1981 /*
a0d0e21e 1982 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW		 1983 * fcntl(2), which truncates the file so that it ends at the
1984 * position indicated by fl.l_start.
1985 *
1986 * Will minor miracles never cease?
1987 */
1988
a0d0e21e 1989 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW		 1990 return -1;
1991
1992 }
6eb13c3b 1993 return 0;
58e24eff 1994#else
27da23d5 1995 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1996#endif /* F_FREESP */
27da23d5 1997 return -1;
58e24eff
SH		 1998}
1999#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 2000
a687059c 2001bool
5aaab254 2002Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
a687059c 2003{
7918f24d
NC		 2004 PERL_ARGS_ASSERT_DO_PRINT;
2005
79072805
LW		 2006 /* assuming fp is checked earlier */
2007 if (!sv)
2008 return TRUE;
e9950d3b
NC		 2009 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
2010 assert(!SvGMAGICAL(sv));
2011 if (SvIsUV(sv))
147e3846 2012 PerlIO_printf(fp, "%" UVuf, (UV)SvUVX(sv));
e9950d3b 2013 else
147e3846 2014 PerlIO_printf(fp, "%" IVdf, (IV)SvIVX(sv));
e9950d3b
NC		 2015 return !PerlIO_error(fp);
2016 }
2017 else {
2018 STRLEN len;
676f44e7 2019 /* Do this first to trigger any overloading. */
e9950d3b
NC		 2020 const char *tmps = SvPV_const(sv, len);
2021 U8 *tmpbuf = NULL;
2022 bool happy = TRUE;
2023
d791f93f
KW		 2024 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
2025 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
676f44e7
NC		 2026 /* We don't modify the original scalar. */
2027 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
2028 tmps = (char *) tmpbuf;
2029 }
a099aed4 2030 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
0876b9a0
KW		 2031 (void) check_utf8_print((const U8*) tmps, len);
2032 }
d791f93f
KW		 2033 } /* else stream isn't utf8 */
2034 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
2035 convert to bytes */
676f44e7
NC		 2036 STRLEN tmplen = len;
2037 bool utf8 = TRUE;
35da51f7 2038 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7 2039 if (!utf8) {
d791f93f
KW		 2040
2041 /* Here, succeeded in downgrading from utf8. Set up to below
2042 * output the converted value */
676f44e7
NC		 2043 tmpbuf = result;
2044 tmps = (char *) tmpbuf;
2045 len = tmplen;
2046 }
d791f93f
KW		 2047 else { /* Non-utf8 output stream, but string only representable in
2048 utf8 */
676f44e7 2049 assert((char *)result == tmps);
9b387841 2050 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
21630838
FC		 2051 "Wide character in %s",
2052 PL_op ? OP_DESC(PL_op) : "print"
2053 );
0876b9a0
KW		 2054 /* Could also check that isn't one of the things to avoid
2055 * in utf8 by using check_utf8_print(), but not doing so,
2056 * since the stream isn't a UTF8 stream */
ae798467
NIS		 2057 }
2058 }
e9950d3b
NC		 2059 /* To detect whether the process is about to overstep its
2060 * filesize limit we would need getrlimit(). We could then
2061 * also transparently raise the limit with setrlimit() --
2062 * but only until the system hard limit/the filesystem limit,
2063 * at which we would get EPERM. Note that when using buffered
2064 * io the write failure can be delayed until the flush/close. --jhi */
2065 if (len && (PerlIO_write(fp,tmps,len) == 0))
2066 happy = FALSE;
2067 Safefree(tmpbuf);
2068 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 2069 }
a687059c
LW		 2070}
2071
79072805 2072I32
0d7d409d 2073Perl_my_stat_flags(pTHX_ const U32 flags)
a687059c 2074{
39644a26 2075 dSP;
79072805 2076 IO *io;
2dd78f96 2077 GV* gv;
79072805 2078
533c011a 2079 if (PL_op->op_flags & OPf_REF) {
2dd78f96 2080 gv = cGVOP_gv;
748a9306 2081 do_fstat:
97c8f3e6
Z		 2082 if (gv == PL_defgv) {
2083 if (PL_laststatval < 0)
2084 SETERRNO(EBADF,RMS_IFI);
5228a96c 2085 return PL_laststatval;
97c8f3e6 2086 }
2dd78f96 2087 io = GvIO(gv);
ad02613c 2088 do_fstat_have_io:
5228a96c 2089 PL_laststype = OP_STAT;
bd5f6c01 2090 PL_statgv = gv ? gv : (GV *)io;
8062ff11 2091 SvPVCLEAR(PL_statname);
77616968 2092 if (io) {
5228a96c 2093 if (IoIFP(io)) {
375ed12a 2094 int fd = PerlIO_fileno(IoIFP(io));
77616968
JH		 2095 if (fd < 0) {
2096 /* E.g. PerlIO::scalar has no real fd. */
97c8f3e6 2097 SETERRNO(EBADF,RMS_IFI);
77616968
JH		 2098 return (PL_laststatval = -1);
2099 } else {
375ed12a
JH		 2100 return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
2101 }
5228a96c 2102 } else if (IoDIRP(io)) {
3497a01f 2103 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c 2104 }
5228a96c 2105 }
3888144c
FC		 2106 PL_laststatval = -1;
2107 report_evil_fh(gv);
97c8f3e6 2108 SETERRNO(EBADF,RMS_IFI);
3888144c 2109 return -1;
a687059c 2110 }
d2c4d2d1 2111 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
8db8f6b6
FC		 2112 == OPpFT_STACKED)
2113 return PL_laststatval;
d2c4d2d1
FC		 2114 else {
2115 SV* const sv = TOPs;
a155eb05 2116 const char *s, *d;
4ecd490c 2117 STRLEN len;
094a3eec 2118 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
748a9306
LW		 2119 goto do_fstat;
2120 }
ad02613c 2121 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
a45c7426 2122 io = MUTABLE_IO(SvRV(sv));
7f39519f 2123 gv = NULL;
ad02613c
SP		 2124 goto do_fstat_have_io;
2125 }
748a9306 2126
0d7d409d 2127 s = SvPV_flags_const(sv, len, flags);
a0714e2c 2128 PL_statgv = NULL;
4ecd490c 2129 sv_setpvn(PL_statname, s, len);
a155eb05 2130 d = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22 2131 PL_laststype = OP_STAT;
a155eb05
TC		 2132 if (!IS_SAFE_PATHNAME(s, len, OP_NAME(PL_op))) {
2133 PL_laststatval = -1;
2134 }
2135 else {
2136 PL_laststatval = PerlLIO_stat(d, &PL_statcache);
2137 }
7cb3f959 2138 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
7347ee54 2139 GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
9014280d 2140 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
7347ee54 2141 GCC_DIAG_RESTORE_STMT;
5d37acd6 2142 }
3280af22 2143 return PL_laststatval;
a687059c
LW		 2144 }
2145}
2146
fbb0b3b3 2147
79072805 2148I32
0d7d409d 2149Perl_my_lstat_flags(pTHX_ const U32 flags)
c623bd54 2150{
a1894d81 2151 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
39644a26 2152 dSP;
b16276bb 2153 const char *file;
a155eb05 2154 STRLEN len;
cd22fad3 2155 SV* const sv = TOPs;
5840701a 2156 bool isio = FALSE;
533c011a 2157 if (PL_op->op_flags & OPf_REF) {
638eceb6 2158 if (cGVOP_gv == PL_defgv) {
3280af22 2159 if (PL_laststype != OP_LSTAT)
0157ef98 2160 Perl_croak(aTHX_ "%s", no_prev_lstat);
97c8f3e6
Z		 2161 if (PL_laststatval < 0)
2162 SETERRNO(EBADF,RMS_IFI);
3280af22 2163 return PL_laststatval;
fe14fcc3 2164 }
31b139ba 2165 PL_laststatval = -1;
5d3e98de 2166 if (ckWARN(WARN_IO)) {
5840701a 2167 /* diag_listed_as: Use of -l on filehandle%s */
d0c0e7dd 2168 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 2169 "Use of -l on filehandle %" HEKf,
d0c0e7dd 2170 HEKfARG(GvENAME_HEK(cGVOP_gv)));
5d3e98de 2171 }
97c8f3e6 2172 SETERRNO(EBADF,RMS_IFI);
31b139ba 2173 return -1;
fe14fcc3 2174 }
8db8f6b6
FC		 2175 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
2176 == OPpFT_STACKED) {
1f26655e 2177 if (PL_laststype != OP_LSTAT)
0157ef98 2178 Perl_croak(aTHX_ "%s", no_prev_lstat);
1f26655e 2179 return PL_laststatval;
cd22fad3 2180 }
c623bd54 2181
3280af22 2182 PL_laststype = OP_LSTAT;
a0714e2c 2183 PL_statgv = NULL;
5840701a
FC		 2184 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
2185 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
2186 )
2187 || isGV_with_GP(sv)
2188 )
2189 && ckWARN(WARN_IO)) {
2190 if (isio)
2191 /* diag_listed_as: Use of -l on filehandle%s */
2192 Perl_warner(aTHX_ packWARN(WARN_IO),
2193 "Use of -l on filehandle");
2194 else
2195 /* diag_listed_as: Use of -l on filehandle%s */
2196 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 2197 "Use of -l on filehandle %" HEKf,
10bafe90
BF		 2198 HEKfARG(GvENAME_HEK((const GV *)
2199 (SvROK(sv) ? SvRV(sv) : sv))));
cd22fad3 2200 }
a155eb05 2201 file = SvPV_flags_const(sv, len, flags);
b16276bb 2202 sv_setpv(PL_statname,file);
a155eb05
TC		 2203 if (!IS_SAFE_PATHNAME(file, len, OP_NAME(PL_op))) {
2204 PL_laststatval = -1;
2205 }
2206 else {
2207 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
2208 }
7cb3f959 2209 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
7347ee54 2210 GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
5d37acd6 2211 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
7347ee54 2212 GCC_DIAG_RESTORE_STMT;
5d37acd6 2213 }
3280af22 2214 return PL_laststatval;
c623bd54
LW		 2215}
2216
a0f2c8ec
JD		 2217static void
2218S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
2219{
2220 const int e = errno;
7918f24d 2221 PERL_ARGS_ASSERT_EXEC_FAILED;
738ab09f
AB		 2222
2223 if (ckWARN(WARN_EXEC))
2224 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
2225 cmd, Strerror(e));
a0f2c8ec 2226 if (do_report) {
b469f1e0
JH		 2227 /* XXX silently ignore failures */
2228 PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int)));
a0f2c8ec
JD		 2229 PerlLIO_close(fd);
2230 }
2231}
2232
738ab09f 2233bool
5aaab254 2234Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
2aa1486d 2235 int fd, int do_report)
d5a9bfb0 2236{
27da23d5 2237 dVAR;
7918f24d 2238 PERL_ARGS_ASSERT_DO_AEXEC5;
e37778c2 2239#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH		 2240 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
2241#else
2fcab330 2242 assert(sp >= mark);
282fc0b3 2243 ENTER;
2fcab330 2244 {
282fc0b3 2245 const char **argv, **a;
6136c704 2246 const char *tmps = NULL;
282fc0b3
Z		 2247 Newx(argv, sp - mark + 1, const char*);
2248 SAVEFREEPV(argv);
2249 a = argv;
890ce7af 2250
79072805 2251 while (++mark <= sp) {
282fc0b3
Z		 2252 if (*mark) {
2253 char *arg = savepv(SvPV_nolen_const(*mark));
2254 SAVEFREEPV(arg);
2255 *a++ = arg;
2256 } else
a687059c
LW		 2257 *a++ = "";
2258 }
6136c704 2259 *a = NULL;
282fc0b3
Z		 2260 if (really) {
2261 tmps = savepv(SvPV_nolen_const(really));
2262 SAVEFREEPV(tmps);
2263 }
2264 if ((!really && argv[0] && *argv[0] != '/') ||
91b2752f 2265 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 2266 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 2267 PERL_FPU_PRE_EXEC
839a9f02 2268 if (really && *tmps) {
282fc0b3
Z		 2269 PerlProc_execvp(tmps,EXEC_ARGV_CAST(argv));
2270 } else if (argv[0]) {
2271 PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv));
2fcab330
DIM		 2272 } else {
2273 SETERRNO(ENOENT,RMS_FNF);
2274 }
b35112e7 2275 PERL_FPU_POST_EXEC
282fc0b3 2276 S_exec_failed(aTHX_ (really ? tmps : argv[0] ? argv[0] : ""), fd, do_report);
a687059c 2277 }
282fc0b3 2278 LEAVE;
cd39f2b6 2279#endif
738ab09f 2280 return FALSE;
a687059c
LW		 2281}
2282
9555a685 2283#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8 2284
738ab09f 2285bool
2fbb330f 2286Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 2287{
27da23d5 2288 dVAR;
282fc0b3 2289 const char **argv, **a;
eb578fdb 2290 char *s;
15db3ae2 2291 char *buf;
2fbb330f 2292 char *cmd;
2fbb330f 2293 /* Make a copy so we can change it */
6fca0082 2294 const Size_t cmdlen = strlen(incmd) + 1;
7918f24d
NC		 2295
2296 PERL_ARGS_ASSERT_DO_EXEC3;
2297
282fc0b3 2298 ENTER;
15db3ae2 2299 Newx(buf, cmdlen, char);
282fc0b3 2300 SAVEFREEPV(buf);
15db3ae2 2301 cmd = buf;
cfff9797 2302 memcpy(cmd, incmd, cmdlen);
a687059c 2303
748a9306
LW		 2304 while (*cmd && isSPACE(*cmd))
2305 cmd++;
2306
a687059c
LW		 2307 /* save an extra exec if possible */
2308
bf38876a 2309#ifdef CSH
d05c1ba0 2310 {
0c19750d 2311 char flags[PERL_FLAGS_MAX];
d05c1ba0 2312 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
c8b388b0 2313 strBEGINs(cmd+PL_cshlen," -c")) {
28f0d0ec 2314 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH		 2315 s = cmd+PL_cshlen+3;
2316 if (*s == 'f') {
2317 s++;
28f0d0ec 2318 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH		 2319 }
2320 if (*s == ' ')
2321 s++;
2322 if (*s++ == '\'') {
0bcc34c2 2323 char * const ncmd = s;
d05c1ba0
JH		 2324
2325 while (*s)
2326 s++;
2327 if (s[-1] == '\n')
2328 *--s = '\0';
2329 if (s[-1] == '\'') {
2330 *--s = '\0';
b35112e7 2331 PERL_FPU_PRE_EXEC
738ab09f 2332 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 2333 PERL_FPU_POST_EXEC
d05c1ba0 2334 *s = '\'';
a0f2c8ec 2335 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
282fc0b3 2336 goto leave;
d05c1ba0
JH		 2337 }
2338 }
a687059c
LW		 2339 }
2340 }
bf38876a 2341#endif /* CSH */
a687059c
LW		 2342
2343 /* see if there are shell metacharacters in it */
2344
748a9306
LW		 2345 if (*cmd == '.' && isSPACE(cmd[1]))
2346 goto doshell;
2347
c8b388b0 2348 if (strBEGINs(cmd,"exec") && isSPACE(cmd[4]))
748a9306
LW		 2349 goto doshell;
2350
294b3b39 2351 s = cmd;
0eb30aeb 2352 while (isWORDCHAR(*s))
294b3b39 2353 s++; /* catch VAR=val gizmo */
63f2c1e1
LW		 2354 if (*s == '=')
2355 goto doshell;
748a9306 2356
a687059c 2357 for (s = cmd; *s; s++) {
d05c1ba0
JH		 2358 if (*s != ' ' && !isALPHA(*s) &&
2359 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW		 2360 if (*s == '\n' && !s[1]) {
2361 *s = '\0';
2362 break;
2363 }
603a98b0
IZ		 2364 /* handle the 2>&1 construct at the end */
2365 if (*s == '>' && s[1] == '&' && s[2] == '1'
2366 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
2367 && (!s[3] || isSPACE(s[3])))
2368 {
6867be6d 2369 const char *t = s + 3;
603a98b0
IZ		 2370
2371 while (*t && isSPACE(*t))
2372 ++t;
943bbd07 2373 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ		 2374 s[-2] = '\0';
2375 break;
2376 }
2377 }
a687059c 2378 doshell:
b35112e7 2379 PERL_FPU_PRE_EXEC
738ab09f 2380 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 2381 PERL_FPU_POST_EXEC
a0f2c8ec 2382 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
282fc0b3 2383 goto leave;
a687059c
LW		 2384 }
2385 }
748a9306 2386
282fc0b3
Z		 2387 Newx(argv, (s - cmd) / 2 + 2, const char*);
2388 SAVEFREEPV(argv);
2389 cmd = savepvn(cmd, s-cmd);
2390 SAVEFREEPV(cmd);
2391 a = argv;
2392 for (s = cmd; *s;) {
294b3b39
AL		 2393 while (isSPACE(*s))
2394 s++;
a687059c
LW		 2395 if (*s)
2396 *(a++) = s;
294b3b39
AL		 2397 while (*s && !isSPACE(*s))
2398 s++;
a687059c
LW		 2399 if (*s)
2400 *s++ = '\0';
2401 }
6136c704 2402 *a = NULL;
282fc0b3 2403 if (argv[0]) {
b35112e7 2404 PERL_FPU_PRE_EXEC
282fc0b3 2405 PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv));
b35112e7 2406 PERL_FPU_POST_EXEC
282fc0b3 2407 if (errno == ENOEXEC) /* for system V NIH syndrome */
a687059c 2408 goto doshell;
282fc0b3 2409 S_exec_failed(aTHX_ argv[0], fd, do_report);
a687059c 2410 }
282fc0b3
Z		 2411leave:
2412 LEAVE;
738ab09f 2413 return FALSE;
a687059c
LW		 2414}
2415
6890e559 2416#endif /* OS2 || WIN32 */
760ac839 2417
79072805 2418I32
5aaab254 2419Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
a687059c 2420{
eb578fdb
KW		 2421 I32 val;
2422 I32 tot = 0;
4634a855 2423 const char *const what = PL_op_name[type];
5c144d81 2424 const char *s;
84c7b88c 2425 STRLEN len;
890ce7af 2426 SV ** const oldmark = mark;
885b4b39 2427 bool killgp = FALSE;
a687059c 2428
7918f24d
NC		 2429 PERL_ARGS_ASSERT_APPLY;
2430
9a9b5ec9
DM		 2431 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
2432
1444765e
NC		 2433 /* Doing this ahead of the switch statement preserves the old behaviour,
2434 where attempting to use kill as a taint test test would fail on
2435 platforms where kill was not defined. */
2436#ifndef HAS_KILL
2437 if (type == OP_KILL)
4634a855 2438 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC		 2439#endif
2440#ifndef HAS_CHOWN
2441 if (type == OP_CHOWN)
4634a855 2442 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC		 2443#endif
2444
2445
20408e3c 2446#define APPLY_TAINT_PROPER() \
3280af22 2447 STMT_START { \
284167a5 2448 if (TAINT_get) { TAINT_PROPER(what); } \
873ef191 2449 } STMT_END
20408e3c
GS		 2450
2451 /* This is a first heuristic; it doesn't catch tainting magic. */
284167a5 2452 if (TAINTING_get) {
463ee0b2 2453 while (++mark <= sp) {
bbce6d69
PP		 2454 if (SvTAINTED(*mark)) {
2455 TAINT;
2456 break;
2457 }
463ee0b2
LW		 2458 }
2459 mark = oldmark;
2460 }
a687059c 2461 switch (type) {
79072805 2462 case OP_CHMOD:
20408e3c 2463 APPLY_TAINT_PROPER();
79072805 2464 if (++mark <= sp) {
4ea561bc 2465 val = SvIV(*mark);
20408e3c
GS		 2466 APPLY_TAINT_PROPER();
2467 tot = sp - mark;
79072805 2468 while (++mark <= sp) {
c4aca7d0 2469 GV* gv;
2ea1cce7 2470 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA		 2471 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2472#ifdef HAS_FCHMOD
375ed12a 2473 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
c4aca7d0 2474 APPLY_TAINT_PROPER();
375ed12a
JH		 2475 if (fd < 0) {
2476 SETERRNO(EBADF,RMS_IFI);
2477 tot--;
2478 } else if (fchmod(fd, val))
2479 tot--;
c4aca7d0 2480#else
b9c6780e 2481 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA		 2482#endif
2483 }
2484 else {
8334cae6 2485 SETERRNO(EBADF,RMS_IFI);
c4aca7d0
GA		 2486 tot--;
2487 }
2488 }
c4aca7d0 2489 else {
41188aa0 2490 const char *name = SvPV_nomg_const(*mark, len);
c4aca7d0 2491 APPLY_TAINT_PROPER();
41188aa0 2492 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
c8028aa6
TC		 2493 PerlLIO_chmod(name, val)) {
2494 tot--;
2495 }
c4aca7d0 2496 }
a687059c
LW		 2497 }
2498 }
2499 break;
fe14fcc3 2500#ifdef HAS_CHOWN
79072805 2501 case OP_CHOWN:
20408e3c 2502 APPLY_TAINT_PROPER();
79072805 2503 if (sp - mark > 2) {
eb578fdb 2504 I32 val2;
463ee0b2
LW		 2505 val = SvIVx(*++mark);
2506 val2 = SvIVx(*++mark);
20408e3c 2507 APPLY_TAINT_PROPER();
a0d0e21e 2508 tot = sp - mark;
79072805 2509 while (++mark <= sp) {
c4aca7d0 2510 GV* gv;
2ea1cce7 2511 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA		 2512 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2513#ifdef HAS_FCHOWN
375ed12a 2514 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
c4aca7d0 2515 APPLY_TAINT_PROPER();
375ed12a 2516 if (fd < 0) {
dd1dbff0 2517 SETERRNO(EBADF,RMS_IFI);
f95ba548 2518 tot--;
375ed12a 2519 } else if (fchown(fd, val, val2))
c4aca7d0
GA		 2520 tot--;
2521#else
b9c6780e 2522 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA		 2523#endif
2524 }
2525 else {
8334cae6 2526 SETERRNO(EBADF,RMS_IFI);
c4aca7d0
GA		 2527 tot--;
2528 }
2529 }
c4aca7d0 2530 else {
41188aa0 2531 const char *name = SvPV_nomg_const(*mark, len);
c4aca7d0 2532 APPLY_TAINT_PROPER();
41188aa0 2533 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
c8028aa6 2534 PerlLIO_chown(name, val, val2)) {
c4aca7d0 2535 tot--;
c8028aa6 2536 }
c4aca7d0 2537 }
a687059c
LW		 2538 }
2539 }
2540 break;
b1248f16 2541#endif
a1d180c4 2542/*
dd64f1c3
AD		 2543XXX Should we make lchown() directly available from perl?
2544For now, we'll let Configure test for HAS_LCHOWN, but do
2545nothing in the core.
2546 --AD 5/1998
2547*/
fe14fcc3 2548#ifdef HAS_KILL
79072805 2549 case OP_KILL:
20408e3c 2550 APPLY_TAINT_PROPER();
55497cff
PP		 2551 if (mark == sp)
2552 break;
84c7b88c 2553 s = SvPVx_const(*++mark, len);
c2fd40cb
DM		 2554 if (*s == '-' && isALPHA(s[1]))
2555 {
2556 s++;
2557 len--;
885b4b39 2558 killgp = TRUE;
c2fd40cb 2559 }
e02bfb16 2560 if (isALPHA(*s)) {
84c7b88c 2561 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
79072805 2562 s += 3;
84c7b88c
BF		 2563 len -= 3;
2564 }
2565 if ((val = whichsig_pvn(s, len)) < 0)
147e3846
KW		 2566 Perl_croak(aTHX_ "Unrecognized signal name \"%" SVf "\"",
2567 SVfARG(*mark));
79072805
LW		 2568 }
2569 else
c2fd40cb 2570 {
4ea561bc 2571 val = SvIV(*mark);
c2fd40cb
DM		 2572 if (val < 0)
2573 {
885b4b39 2574 killgp = TRUE;
c2fd40cb
DM		 2575 val = -val;
2576 }
2577 }
20408e3c
GS		 2578 APPLY_TAINT_PROPER();
2579 tot = sp - mark;
fbcd93f0 2580
c2fd40cb 2581 while (++mark <= sp) {
60082291 2582 Pid_t proc;
c2fd40cb 2583 SvGETMAGIC(*mark);
60082291 2584 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
c2fd40cb
DM		 2585 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
2586 proc = SvIV_nomg(*mark);
c2fd40cb 2587 APPLY_TAINT_PROPER();
111f73b5
DM		 2588#ifdef HAS_KILLPG
2589 /* use killpg in preference, as the killpg() wrapper for Win32
2590 * understands process groups, but the kill() wrapper doesn't */
2591 if (killgp ? PerlProc_killpg(proc, val)
2592 : PerlProc_kill(proc, val))
2593#else
2594 if (PerlProc_kill(killgp ? -proc: proc, val))
2595#endif
c2fd40cb 2596 tot--;
a687059c 2597 }
8165faea 2598 PERL_ASYNC_CHECK();
a687059c 2599 break;
b1248f16 2600#endif
79072805 2601 case OP_UNLINK:
20408e3c 2602 APPLY_TAINT_PROPER();
79072805
LW		 2603 tot = sp - mark;
2604 while (++mark <= sp) {
41188aa0 2605 s = SvPV_const(*mark, len);
20408e3c 2606 APPLY_TAINT_PROPER();
41188aa0 2607 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
c8028aa6
TC		 2608 tot--;
2609 }
f0d85c30 2610 else if (PL_unsafe) {
b8ffc8df 2611 if (UNLINK(s))
5cdd1fc2 2612 {
a687059c 2613 tot--;
5cdd1fc2
AB		 2614 }
2615#if defined(__amigaos4__) && defined(NEWLIB)
2616 else
2617 {
2618 /* Under AmigaOS4 unlink only 'fails' if the
2619 * filename is invalid. It may not remove the file
2620 * if it's locked, so check if it's still around. */
2621 if ((access(s,F_OK) != -1))
2622 {
2623 tot--;
2624 }
2625 }
2626#endif
a687059c
LW		 2627 }
2628 else { /* don't let root wipe out directories without -U */
45a23732
DD		 2629 Stat_t statbuf;
2630 if (PerlLIO_lstat(s, &statbuf) < 0)
1dcae8b8 2631 tot--;
45a23732 2632 else if (S_ISDIR(statbuf.st_mode)) {
cd52bc19 2633 SETERRNO(EISDIR, SS_NOPRIV);
45a23732 2634 tot--;
1dcae8b8 2635 }
a687059c 2636 else {
b8ffc8df 2637 if (UNLINK(s))
5cdd1fc2
AB		 2638 {
2639 tot--;
2640 }
2641#if defined(__amigaos4__) && defined(NEWLIB)
2642 else
2643 {
2644 /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
2645 /* It may not remove the file if it's Locked, so check if it's still */
2646 /* arround */
2647 if((access(s,F_OK) != -1))
2648 {
2649 tot--;
2650 }
2651 }
2652#endif
a687059c
LW		 2653 }
2654 }
2655 }
2656 break;
e96b369d 2657#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 2658 case OP_UTIME:
20408e3c 2659 APPLY_TAINT_PROPER();
79072805 2660 if (sp - mark > 2) {
e96b369d
GA		 2661#if defined(HAS_FUTIMES)
2662 struct timeval utbuf[2];
2663 void *utbufp = utbuf;
2664#elif defined(I_UTIME) || defined(VMS)
663a0e37 2665 struct utimbuf utbuf;
07409e01 2666 struct utimbuf *utbufp = &utbuf;
663a0e37 2667#else
a687059c 2668 struct {
dd2821f6
GS		 2669 Time_t actime;
2670 Time_t modtime;
a687059c 2671 } utbuf;
07409e01 2672 void *utbufp = &utbuf;
663a0e37 2673#endif
a687059c 2674
0bcc34c2
AL		 2675 SV* const accessed = *++mark;
2676 SV* const modified = *++mark;
c6f7b413 2677
6ec06612
SB		 2678 /* Be like C, and if both times are undefined, let the C
2679 * library figure out what to do. This usually means
2680 * "current time". */
c6f7b413
RS		 2681
2682 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB		 2683 utbufp = NULL;
2684 else {
2685 Zero(&utbuf, sizeof utbuf, char);
e96b369d 2686#ifdef HAS_FUTIMES
4ea561bc 2687 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 2688 utbuf[0].tv_usec = 0;
4ea561bc 2689 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA		 2690 utbuf[1].tv_usec = 0;
2691#elif defined(BIG_TIME)
4ea561bc
NC		 2692 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
2693 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 2694#else
4ea561bc
NC		 2695 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
2696 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 2697#endif
6ec06612 2698 }
4373e329 2699 APPLY_TAINT_PROPER();
79072805
LW		 2700 tot = sp - mark;
2701 while (++mark <= sp) {
e96b369d 2702 GV* gv;
64617da9 2703 if ((gv = MAYBE_DEREF_GV(*mark))) {
e96b369d
GA		 2704 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2705#ifdef HAS_FUTIMES
375ed12a 2706 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
e96b369d 2707 APPLY_TAINT_PROPER();
375ed12a
JH		 2708 if (fd < 0) {
2709 SETERRNO(EBADF,RMS_IFI);
2710 tot--;
2711 } else if (futimes(fd, (struct timeval *) utbufp))
e96b369d
GA		 2712 tot--;
2713#else
2714 Perl_die(aTHX_ PL_no_func, "futimes");
2715#endif
2716 }
2717 else {
2718 tot--;
2719 }
2720 }
e96b369d 2721 else {
41188aa0 2722 const char * const name = SvPV_nomg_const(*mark, len);
e96b369d 2723 APPLY_TAINT_PROPER();
41188aa0 2724 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
c8028aa6
TC		 2725 tot--;
2726 }
2727 else
e96b369d 2728#ifdef HAS_FUTIMES
8b7231d9 2729 if (utimes(name, (struct timeval *)utbufp))
e96b369d
GA		 2730#else
2731 if (PerlLIO_utime(name, utbufp))
2732#endif
2733 tot--;
2734 }
2735
a687059c 2736 }
a687059c
LW		 2737 }
2738 else
79072805 2739 tot = 0;
a687059c 2740 break;
a0d0e21e 2741#endif
a687059c
LW		 2742 }
2743 return tot;
20408e3c 2744
20408e3c 2745#undef APPLY_TAINT_PROPER
a687059c
LW		 2746}
2747
bd93adf5 2748/* Do the permissions in *statbufp allow some operation? */
a0d0e21e 2749#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 2750bool
5aaab254 2751Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
ae1951c1
NC		 2752/* effective is a flag, true for EUID, or for checking if the effective gid
2753 * is in the list of groups returned from getgroups().
2754 */
a687059c 2755{
7918f24d 2756 PERL_ARGS_ASSERT_CANDO;
81611534 2757 PERL_UNUSED_CONTEXT;
7918f24d 2758
bee1dbe2 2759#ifdef DOSISH
fe14fcc3
LW		 2760 /* [Comments and code from Len Reed]
2761 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2762 * to write-protected files. The execute permission bit is set
486ec47a 2763 * by the Microsoft C library stat() function for the following:
fe14fcc3
LW		 2764 * .exe files
2765 * .com files
2766 * .bat files
2767 * directories
2768 * All files and directories are readable.
2769 * Directories and special files, e.g. "CON", cannot be
2770 * write-protected.
2771 * [Comment by Tom Dinger -- a directory can have the write-protect
2772 * bit set in the file system, but DOS permits changes to
2773 * the directory anyway. In addition, all bets are off
2774 * here for networked software, such as Novell and
2775 * Sun's PC-NFS.]
2776 */
2777
bee1dbe2
LW		 2778 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2779 * too so it will actually look into the files for magic numbers
2780 */
8298454c 2781 return cBOOL(mode & statbufp->st_mode);
fe14fcc3 2782
55497cff 2783#else /* ! DOSISH */
b595cd4b
RU		 2784# ifdef __CYGWIN__
2785 if (ingroup(544,effective)) { /* member of Administrators */
2786# else
985213f2 2787 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
b595cd4b 2788# endif
7f4774ae 2789 if (mode == S_IXUSR) {
c623bd54 2790 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW		 2791 return TRUE;
2792 }
2793 else
2794 return TRUE; /* root reads and writes anything */
2795 return FALSE;
2796 }
985213f2 2797 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
7f4774ae 2798 if (statbufp->st_mode & mode)
a687059c
LW		 2799 return TRUE; /* ok as "user" */
2800 }
d8eceb89 2801 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 2802 if (statbufp->st_mode & mode >> 3)
a687059c
LW		 2803 return TRUE; /* ok as "group" */
2804 }
7f4774ae 2805 else if (statbufp->st_mode & mode >> 6)
a687059c
LW		 2806 return TRUE; /* ok as "other" */
2807 return FALSE;
55497cff 2808#endif /* ! DOSISH */
a687059c 2809}
a0d0e21e 2810#endif /* ! VMS */
a687059c 2811
1f676739 2812static bool
0da8eb3a 2813S_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 2814{
81611534
JH		 2815#ifndef PERL_IMPLICIT_SYS
2816 /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */
2817 PERL_UNUSED_CONTEXT;
2818#endif
985213f2 2819 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
a687059c 2820 return TRUE;
fe14fcc3 2821#ifdef HAS_GETGROUPS
a687059c 2822 {
331b57bc 2823 Groups_t *gary = NULL;
79072805 2824 I32 anum;
331b57bc 2825 bool rc = FALSE;
a687059c 2826
331b57bc 2827 anum = getgroups(0, gary);
375ed12a
JH		 2828 if (anum > 0) {
2829 Newx(gary, anum, Groups_t);
2830 anum = getgroups(anum, gary);
2831 while (--anum >= 0)
2832 if (gary[anum] == testgid) {
2833 rc = TRUE;
2834 break;
2835 }
331b57bc 2836
375ed12a
JH		 2837 Safefree(gary);
2838 }
331b57bc 2839 return rc;
a687059c 2840 }
c685562b 2841#else
a687059c 2842 return FALSE;
cd39f2b6 2843#endif
a687059c 2844}
c2ab57d4 2845
fe14fcc3 2846#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 2847
79072805 2848I32
864dbfa3 2849Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2850{
0bcc34c2 2851 const key_t key = (key_t)SvNVx(*++mark);
c3312966 2852 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
6867be6d 2853 const I32 flags = SvIVx(*++mark);
294a48e9 2854
7918f24d 2855 PERL_ARGS_ASSERT_DO_IPCGET;
294a48e9 2856 PERL_UNUSED_ARG(sp);
c2ab57d4 2857
748a9306 2858 SETERRNO(0,0);
c2ab57d4
LW		 2859 switch (optype)
2860 {
fe14fcc3 2861#ifdef HAS_MSG
79072805 2862 case OP_MSGGET:
c2ab57d4 2863 return msgget(key, flags);
e5d73d77 2864#endif
fe14fcc3 2865#ifdef HAS_SEM
79072805 2866 case OP_SEMGET:
c3312966 2867 return semget(key, (int) SvIV(nsv), flags);
e5d73d77 2868#endif
fe14fcc3 2869#ifdef HAS_SHM
79072805 2870 case OP_SHMGET:
c3312966 2871 return shmget(key, (size_t) SvUV(nsv), flags);
e5d73d77 2872#endif
fe14fcc3 2873#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2874 default:
fe13d51d 2875 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2876 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2877#endif
c2ab57d4
LW		 2878 }
2879 return -1; /* should never happen */
2880}
2881
79072805 2882I32
864dbfa3 2883Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2884{
c2ab57d4 2885 char *a;
a0d0e21e 2886 I32 ret = -1;
6867be6d 2887 const I32 id = SvIVx(*++mark);
95b63a38 2888#ifdef Semctl
6867be6d 2889 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2890#endif
6867be6d 2891 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL		 2892 SV * const astr = *++mark;
2893 STRLEN infosize = 0;
2894 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2895
7918f24d 2896 PERL_ARGS_ASSERT_DO_IPCCTL;
0bcc34c2 2897 PERL_UNUSED_ARG(sp);
c2ab57d4
LW		 2898
2899 switch (optype)
2900 {
fe14fcc3 2901#ifdef HAS_MSG
79072805 2902 case OP_MSGCTL:
c2ab57d4
LW		 2903 if (cmd == IPC_STAT || cmd == IPC_SET)
2904 infosize = sizeof(struct msqid_ds);
2905 break;
e5d73d77 2906#endif
fe14fcc3 2907#ifdef HAS_SHM
79072805 2908 case OP_SHMCTL:
c2ab57d4
LW		 2909 if (cmd == IPC_STAT || cmd == IPC_SET)
2910 infosize = sizeof(struct shmid_ds);
2911 break;
e5d73d77 2912#endif
fe14fcc3 2913#ifdef HAS_SEM
79072805 2914 case OP_SEMCTL:
39398f3f 2915#ifdef Semctl
c2ab57d4
LW		 2916 if (cmd == IPC_STAT || cmd == IPC_SET)
2917 infosize = sizeof(struct semid_ds);
2918 else if (cmd == GETALL || cmd == SETALL)
2919 {
8e591e46 2920 struct semid_ds semds;
bd89102f 2921 union semun semun;
e6f0bdd6
GS		 2922#ifdef EXTRA_F_IN_SEMUN_BUF
2923 semun.buff = &semds;
2924#else
84902520 2925 semun.buf = &semds;
e6f0bdd6 2926#endif
c2ab57d4 2927 getinfo = (cmd == GETALL);
9b89d93d
GB		 2928 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2929 return -1;
6e21c824
LW		 2930 infosize = semds.sem_nsems * sizeof(short);
2931 /* "short" is technically wrong but much more portable
2932 than guessing about u_?short(_t)? */
c2ab57d4 2933 }
39398f3f 2934#else
fe13d51d 2935 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2936 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2937#endif
c2ab57d4 2938 break;
e5d73d77 2939#endif
fe14fcc3 2940#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2941 default:
fe13d51d 2942 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2943 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2944#endif
c2ab57d4
LW		 2945 }
2946
2947 if (infosize)
2948 {
2949 if (getinfo)
2950 {
93524f2b 2951 SvPV_force_nolen(astr);
a0d0e21e 2952 a = SvGROW(astr, infosize+1);
c2ab57d4
LW		 2953 }
2954 else
2955 {
93524f2b 2956 STRLEN len;
463ee0b2
LW		 2957 a = SvPV(astr, len);
2958 if (len != infosize)
cea2e8a9 2959 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH		 2960 PL_op_desc[optype],
2961 (unsigned long)len,
2962 (long)infosize);
c2ab57d4
LW		 2963 }
2964 }
2965 else
2966 {
0bcc34c2 2967 const IV i = SvIV(astr);
56431972 2968 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2969 }
748a9306 2970 SETERRNO(0,0);
c2ab57d4
LW		 2971 switch (optype)
2972 {
fe14fcc3 2973#ifdef HAS_MSG
79072805 2974 case OP_MSGCTL:
bee1dbe2 2975 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2976 break;
e5d73d77 2977#endif
fe14fcc3 2978#ifdef HAS_SEM
bd89102f 2979 case OP_SEMCTL: {
39398f3f 2980#ifdef Semctl
bd89102f
AD		 2981 union semun unsemds;
2982
64d76282
BC		 2983 if(cmd == SETVAL) {
2984 unsemds.val = PTR2nat(a);
2985 }
2986 else {
e6f0bdd6 2987#ifdef EXTRA_F_IN_SEMUN_BUF
64d76282 2988 unsemds.buff = (struct semid_ds *)a;
e6f0bdd6 2989#else
64d76282 2990 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2991#endif
64d76282 2992 }
bd89102f 2993 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2994#else
fe13d51d 2995 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2996 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2997#endif
bd89102f 2998 }
c2ab57d4 2999 break;
e5d73d77 3000#endif
fe14fcc3 3001#ifdef HAS_SHM
79072805 3002 case OP_SHMCTL:
bee1dbe2 3003 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 3004 break;
e5d73d77 3005#endif
c2ab57d4
LW		 3006 }
3007 if (getinfo && ret >= 0) {
79072805
LW		 3008 SvCUR_set(astr, infosize);
3009 *SvEND(astr) = '\0';
a0d0e21e 3010 SvSETMAGIC(astr);
c2ab57d4
LW		 3011 }
3012 return ret;
3013}
3014
79072805 3015I32
864dbfa3 3016Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 3017{
fe14fcc3 3018#ifdef HAS_MSG
463ee0b2 3019 STRLEN len;
6867be6d 3020 const I32 id = SvIVx(*++mark);
0bcc34c2
AL		 3021 SV * const mstr = *++mark;
3022 const I32 flags = SvIVx(*++mark);
3023 const char * const mbuf = SvPV_const(mstr, len);
3024 const I32 msize = len - sizeof(long);
3025
7918f24d 3026 PERL_ARGS_ASSERT_DO_MSGSND;
890ce7af 3027 PERL_UNUSED_ARG(sp);
c2ab57d4 3028
0bcc34c2 3029 if (msize < 0)
cea2e8a9 3030 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 3031 SETERRNO(0,0);
681fb693
JH		 3032 if (id >= 0 && flags >= 0) {
3033 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
3034 } else {
3035 SETERRNO(EINVAL,LIB_INVARG);
3036 return -1;
3037 }
e5d73d77 3038#else
2d51fa4d
RGS		 3039 PERL_UNUSED_ARG(sp);
3040 PERL_UNUSED_ARG(mark);
fe13d51d 3041 /* diag_listed_as: msg%s not implemented */
cea2e8a9 3042 Perl_croak(aTHX_ "msgsnd not implemented");
7c522378 3043 return -1;
e5d73d77 3044#endif
c2ab57d4
LW		 3045}
3046
79072805 3047I32
864dbfa3 3048Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 3049{
fe14fcc3 3050#ifdef HAS_MSG
c2ab57d4
LW		 3051 char *mbuf;
3052 long mtype;
6867be6d 3053 I32 msize, flags, ret;
6867be6d 3054 const I32 id = SvIVx(*++mark);
0bcc34c2 3055 SV * const mstr = *++mark;
7918f24d
NC		 3056
3057 PERL_ARGS_ASSERT_DO_MSGRCV;
890ce7af 3058 PERL_UNUSED_ARG(sp);
79072805 3059
c2e66d9e
GS		 3060 /* suppress warning when reading into undef var --jhi */
3061 if (! SvOK(mstr))
8062ff11 3062 SvPVCLEAR(mstr);
463ee0b2
LW		 3063 msize = SvIVx(*++mark);
3064 mtype = (long)SvIVx(*++mark);
3065 flags = SvIVx(*++mark);
93524f2b 3066 SvPV_force_nolen(mstr);
a0d0e21e 3067 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 3068
748a9306 3069 SETERRNO(0,0);
d2607e1e
JH		 3070 if (id >= 0 && msize >= 0 && flags >= 0) {
3071 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
3072 } else {
3073 SETERRNO(EINVAL,LIB_INVARG);
3074 ret = -1;
3075 }
c2ab57d4 3076 if (ret >= 0) {
79072805
LW		 3077 SvCUR_set(mstr, sizeof(long)+ret);
3078 *SvEND(mstr) = '\0';
41d6edb2
JH		 3079 /* who knows who has been playing with this message? */
3080 SvTAINTED_on(mstr);
c2ab57d4
LW		 3081 }
3082 return ret;
e5d73d77 3083#else
2d51fa4d
RGS		 3084 PERL_UNUSED_ARG(sp);
3085 PERL_UNUSED_ARG(mark);
fe13d51d 3086 /* diag_listed_as: msg%s not implemented */
cea2e8a9 3087 Perl_croak(aTHX_ "msgrcv not implemented");
7c522378 3088 return -1;
e5d73d77 3089#endif
c2ab57d4
LW		 3090}
3091
79072805 3092I32
864dbfa3 3093Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 3094{
fe14fcc3 3095#ifdef HAS_SEM
463ee0b2 3096 STRLEN opsize;
6867be6d 3097 const I32 id = SvIVx(*++mark);
0bcc34c2
AL		 3098 SV * const opstr = *++mark;
3099 const char * const opbuf = SvPV_const(opstr, opsize);
7918f24d
NC		 3100
3101 PERL_ARGS_ASSERT_DO_SEMOP;
890ce7af 3102 PERL_UNUSED_ARG(sp);
c2ab57d4 3103
248ff010
NC		 3104 if (opsize < 3 * SHORTSIZE
3105 || (opsize % (3 * SHORTSIZE))) {
93189314 3106 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW		 3107 return -1;
3108 }
748a9306 3109 SETERRNO(0,0);
248ff010
NC		 3110 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
3111 {
6867be6d 3112 const int nsops = opsize / (3 * sizeof (short));
248ff010 3113 int i = nsops;
0bcc34c2 3114 short * const ops = (short *) opbuf;
248ff010
NC		 3115 short *o = ops;
3116 struct sembuf *temps, *t;
3117 I32 result;
3118
a02a5408 3119 Newx (temps, nsops, struct sembuf);
248ff010
NC		 3120 t = temps;
3121 while (i--) {
3122 t->sem_num = *o++;
3123 t->sem_op = *o++;
3124 t->sem_flg = *o++;
3125 t++;
3126 }
3127 result = semop(id, temps, nsops);
248ff010
NC		 3128 Safefree(temps);
3129 return result;
3130 }
e5d73d77 3131#else
fe13d51d 3132 /* diag_listed_as: sem%s not implemented */
cea2e8a9 3133 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 3134#endif
c2ab57d4
LW		 3135}
3136
79072805 3137I32
864dbfa3 3138Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 3139{
fe14fcc3 3140#ifdef HAS_SHM
4373e329 3141 char *shm;
c2ab57d4 3142 struct shmid_ds shmds;
6867be6d 3143 const I32 id = SvIVx(*++mark);
0bcc34c2
AL		 3144 SV * const mstr = *++mark;
3145 const I32 mpos = SvIVx(*++mark);
3146 const I32 msize = SvIVx(*++mark);
7918f24d
NC		 3147
3148 PERL_ARGS_ASSERT_DO_SHMIO;
890ce7af 3149 PERL_UNUSED_ARG(sp);
c2ab57d4 3150
748a9306 3151 SETERRNO(0,0);
c2ab57d4
LW		 3152 if (shmctl(id, IPC_STAT, &shmds) == -1)
3153 return -1;
7f39519f
NC		 3154 if (mpos < 0 || msize < 0
3155 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
93189314 3156 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW		 3157 return -1;
3158 }
568fc267
JH		 3159 if (id >= 0) {
3160 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
3161 } else {
3162 SETERRNO(EINVAL,LIB_INVARG);
3163 return -1;
3164 }
c2ab57d4
LW		 3165 if (shm == (char *)-1) /* I hate System V IPC, I really do */
3166 return -1;
79072805 3167 if (optype == OP_SHMREAD) {
c8ae91a8 3168 char *mbuf;
9f538c04 3169 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
b399897d
CS		 3170 SvGETMAGIC(mstr);
3171 SvUPGRADE(mstr, SVt_PV);
9f538c04 3172 if (! SvOK(mstr))
8062ff11 3173 SvPVCLEAR(mstr);
af8ff727 3174 SvPOK_only(mstr);
bb7a0f54 3175 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 3176
bee1dbe2 3177 Copy(shm + mpos, mbuf, msize, char);
79072805
LW		 3178 SvCUR_set(mstr, msize);
3179 *SvEND(mstr) = '\0';
a0d0e21e 3180 SvSETMAGIC(mstr);
d929ce6f
JH		 3181 /* who knows who has been playing with this shared memory? */
3182 SvTAINTED_on(mstr);
c2ab57d4
LW		 3183 }
3184 else {
93524f2b 3185 STRLEN len;
c2ab57d4 3186
93524f2b 3187 const char *mbuf = SvPV_const(mstr, len);
027aa12d 3188 const I32 n = ((I32)len > msize) ? msize : (I32)len;
bee1dbe2 3189 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 3190 if (n < msize)
bee1dbe2 3191 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW		 3192 }
3193 return shmdt(shm);
e5d73d77 3194#else
fe13d51d 3195 /* diag_listed_as: shm%s not implemented */
cea2e8a9 3196 Perl_croak(aTHX_ "shm I/O not implemented");
7c522378 3197 return -1;
e5d73d77 3198#endif
c2ab57d4
LW		 3199}
3200
fe14fcc3 3201#endif /* SYSV IPC */
4e35701f 3202
0d44d22b 3203/*
ccfc67b7
JH		 3204=head1 IO Functions
3205
0d44d22b
NC		 3206=for apidoc start_glob
3207
3208Function called by C<do_readline> to spawn a glob (or do the glob inside
154e47c8 3209perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
25047fde
KW		 3210this glob starter is only used by miniperl during the build process,
3211or when PERL_EXTERNAL_GLOB is defined.
75af9d73 3212Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up.
fab3f3a7 3213
0d44d22b
NC		 3214=cut
3215*/
3216
3217PerlIO *
3218Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
3219{
561b68a9 3220 SV * const tmpcmd = newSV(0);
0d44d22b 3221 PerlIO *fp;
41188aa0
TC		 3222 STRLEN len;
3223 const char *s = SvPV(tmpglob, len);
7918f24d
NC		 3224
3225 PERL_ARGS_ASSERT_START_GLOB;
3226
41188aa0 3227 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
c8028aa6
TC		 3228 return NULL;
3229
0d44d22b
NC		 3230 ENTER;
3231 SAVEFREESV(tmpcmd);
3232#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
3233 /* since spawning off a process is a real performance hit */
dca5a913 3234
1cc9774b
CB		 3235PerlIO *
3236Perl_vms_start_glob
3237 (pTHX_ SV *tmpglob,
3238 IO *io);
3239
49a7a762 3240 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 3241
0d44d22b 3242#else /* !VMS */
4009c3ff
AC		 3243# ifdef DOSISH
3244# if defined(OS2)
0d44d22b
NC		 3245 sv_setpv(tmpcmd, "for a in ");
3246 sv_catsv(tmpcmd, tmpglob);
f8db7d5b 3247 sv_catpvs(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
4009c3ff 3248# elif defined(DJGPP)
0d44d22b
NC		 3249 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
3250 sv_catsv(tmpcmd, tmpglob);
4009c3ff 3251# else
0d44d22b
NC		 3252 sv_setpv(tmpcmd, "perlglob ");
3253 sv_catsv(tmpcmd, tmpglob);
f8db7d5b 3254 sv_catpvs(tmpcmd, " |");
4009c3ff
AC		 3255# endif
3256# elif defined(CSH)
0d44d22b 3257 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
f8db7d5b 3258 sv_catpvs(tmpcmd, " -cf 'set nonomatch; glob ");
0d44d22b 3259 sv_catsv(tmpcmd, tmpglob);
f8db7d5b 3260 sv_catpvs(tmpcmd, "' 2>/dev/null |");
4009c3ff 3261# else
0d44d22b
NC		 3262 sv_setpv(tmpcmd, "echo ");
3263 sv_catsv(tmpcmd, tmpglob);
f8db7d5b 3264 sv_catpvs(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
4009c3ff 3265# endif /* !DOSISH && !CSH */
93b2dae1 3266 {
acffc8af
FC		 3267 SV ** const svp = hv_fetchs(GvHVn(PL_envgv), "LS_COLORS", 0);
3268 if (svp && *svp)
3269 save_helem_flags(GvHV(PL_envgv),
3270 newSVpvs_flags("LS_COLORS", SVs_TEMP), svp,
3271 SAVEf_SETMAGIC);
93b2dae1 3272 }
d5eb9a46
NC		 3273 (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
3274 NULL, NULL, 0);
0d44d22b
NC		 3275 fp = IoIFP(io);
3276#endif /* !VMS */
3277 LEAVE;
de7dabb6
TC		 3278
3279 if (!fp && ckWARN(WARN_GLOB)) {
3280 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
3281 Strerror(errno));
3282 }
3283
0d44d22b
NC		 3284 return fp;
3285}
66610fdd
RGS		 3286
3287/*
14d04a33 3288 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3289 */
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