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[perl5.git] / doio.c
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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 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 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 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 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 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 */
1166 if (mg->mg_obj && IoIFP(io)) {
1167 SV **pid_psv;
733612e0
TC		 1168#ifdef ARGV_USE_ATFUNCTIONS
1169 SV **dir_psv;
1170 DIR *dir;
1171#endif
d0405818 1172 PerlIO *iop = IoIFP(io);
05df5c88
TC		 1173
1174 assert(SvTYPE(mg->mg_obj) == SVt_PVAV);
1175
1176 pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE);
1177
1178 assert(pid_psv && *pid_psv);
1179
1180 if (SvIV(*pid_psv) == (IV)PerlProc_getpid()) {
1181 /* if we get here the file hasn't been closed explicitly by the
1182 user and hadn't been closed implicitly by nextargv(), so
1183 abandon the edit */
184f90dc
TC		 1184 SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
1185 const char *temp_pv = SvPVX(*temp_psv);
1186
1187 assert(temp_psv && *temp_psv && SvPOK(*temp_psv));
05df5c88
TC		 1188 (void)PerlIO_close(iop);
1189 IoIFP(io) = IoOFP(io) = NULL;
733612e0 1190#ifdef ARGV_USE_ATFUNCTIONS
05df5c88
TC		 1191 dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE);
1192 assert(dir_psv && *dir_psv && SvIOK(*dir_psv));
1193 dir = INT2PTR(DIR *, SvIV(*dir_psv));
1194 if (dir) {
184f90dc
TC		 1195 if (unlinkat(my_dirfd(dir), temp_pv, 0) < 0 &&
1196 NotSupported(errno))
1197 (void)UNLINK(temp_pv);
05df5c88
TC		 1198 closedir(dir);
1199 }
733612e0 1200#else
184f90dc 1201 (void)UNLINK(temp_pv);
733612e0 1202#endif
05df5c88 1203 }
e0d4aead
TC		 1204 }
1205
1206 return 0;
1207}
1208
8ab93df0
TC		 1209static int
1210S_argvout_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1211 PERL_UNUSED_ARG(param);
1212
1213 /* ideally we could just remove the magic from the SV but we don't get the SV here */
1214 SvREFCNT_dec(mg->mg_obj);
1215 mg->mg_obj = NULL;
1216
1217 return 0;
1218}
1219
e0d4aead
TC		 1220/* Magic of this type has an AV containing the following:
1221 0: name of the backup file (if any)
1222 1: name of the temp output file
1223 2: name of the original file
1224 3: file mode of the original file
05df5c88
TC		 1225 4: pid of the process we opened at, to prevent doing the renaming
1226 etc in both the child and the parent after a fork
733612e0 1227
184f90dc
TC		 1228If we have useful inode/device ids in stat_t we also keep:
1229 5: a stat of the original current working directory
1230
733612e0 1231If we have unlinkat(), renameat(), fchmodat(), dirfd() we also keep:
184f90dc 1232 6: the DIR * for the current directory when we open the file, stored as an IV
e0d4aead
TC		 1233 */
1234
1235static const MGVTBL argvout_vtbl =
1236 {
1237 NULL, /* svt_get */
1238 NULL, /* svt_set */
1239 NULL, /* svt_len */
1240 NULL, /* svt_clear */
1241 S_argvout_free, /* svt_free */
1242 NULL, /* svt_copy */
8ab93df0
TC		 1243 S_argvout_dup, /* svt_dup */
1244 NULL /* svt_local */
e0d4aead
TC		 1245 };
1246
760ac839 1247PerlIO *
157fb5a1 1248Perl_nextargv(pTHX_ GV *gv, bool nomagicopen)
a687059c 1249{
2d03de9c 1250 IO * const io = GvIOp(gv);
502aca56 1251 SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL;
fe14fcc3 1252
7918f24d
NC		 1253 PERL_ARGS_ASSERT_NEXTARGV;
1254
502aca56
TC		 1255 if (old_out_name)
1256 SAVEFREESV(old_out_name);
1257
3280af22 1258 if (!PL_argvoutgv)
fafc274c 1259 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
5513c2cf 1260 if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) {
18708f5a 1261 IoFLAGS(io) &= ~IOf_START;
7a1c5554 1262 if (PL_inplace) {
294b3b39 1263 assert(PL_defoutgv);
29a861e7
NC		 1264 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
1265 SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 1266 }
18708f5a 1267 }
e0d4aead
TC		 1268
1269 {
1270 IO * const io = GvIOp(PL_argvoutgv);
1271 if (io && IoIFP(io) && old_out_name) {
1272 do_close(PL_argvoutgv, FALSE);
1273 }
fe14fcc3 1274 }
e0d4aead 1275
c797f2d8 1276 PL_lastfd = -1;
3280af22 1277 PL_filemode = 0;
5c501b37 1278 if (!GvAV(gv))
4608196e 1279 return NULL;
b9f2b683 1280 while (av_tindex(GvAV(gv)) >= 0) {
85aff577 1281 STRLEN oldlen;
1fa0529f 1282 SV *const sv = av_shift(GvAV(gv));
8990e307 1283 SAVEFREESV(sv);
4bac9ae4 1284 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
e203899d 1285 sv_setsv(GvSVn(gv),sv);
79072805 1286 SvSETMAGIC(GvSV(gv));
3280af22 1287 PL_oldname = SvPVx(GvSV(gv), oldlen);
d8015975 1288 if (LIKELY(!PL_inplace)) {
157fb5a1
RGS		 1289 if (nomagicopen
1290 ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1)
1291 : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)
1292 ) {
d8015975
NC		 1293 return IoIFP(GvIOp(gv));
1294 }
1295 }
1296 else {
7e30e49f 1297 Stat_t statbuf;
d8015975
NC		 1298 /* This very long block ends with return IoIFP(GvIOp(gv));
1299 Both this block and the block above fall through on open
1300 failure to the warning code, and then the while loop above tries
1301 the next entry. */
7e30e49f 1302 if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0, &statbuf)) {
1fa0529f
NC		 1303#ifndef FLEXFILENAMES
1304 int filedev;
1305 int fileino;
1306#endif
733612e0
TC		 1307#ifdef ARGV_USE_ATFUNCTIONS
1308 DIR *curdir;
1309#endif
1fa0529f
NC		 1310 Uid_t fileuid;
1311 Gid_t filegid;
e0d4aead
TC		 1312 AV *magic_av = NULL;
1313 SV *temp_name_sv = NULL;
8ab93df0 1314 MAGIC *mg;
1fa0529f 1315
79072805 1316 TAINT_PROPER("inplace open");
3280af22 1317 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC		 1318 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
1319 SVt_PVIO));
a0d0e21e 1320 return IoIFP(GvIOp(gv));
c623bd54 1321 }
99b89507 1322#ifndef FLEXFILENAMES
7e30e49f
DIM		 1323 filedev = statbuf.st_dev;
1324 fileino = statbuf.st_ino;
99b89507 1325#endif
7e30e49f
DIM		 1326 PL_filemode = statbuf.st_mode;
1327 fileuid = statbuf.st_uid;
1328 filegid = statbuf.st_gid;
3280af22 1329 if (!S_ISREG(PL_filemode)) {
9b387841
NC		 1330 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
1331 "Can't do inplace edit: %s is not a regular file",
1332 PL_oldname );
79072805 1333 do_close(gv,FALSE);
c623bd54
LW		 1334 continue;
1335 }
e0d4aead 1336 magic_av = newAV();
c9930541 1337 if (*PL_inplace && strNE(PL_inplace, "*")) {
2d03de9c 1338 const char *star = strchr(PL_inplace, '*');
2d259d92 1339 if (star) {
2d03de9c 1340 const char *begin = PL_inplace;
8062ff11 1341 SvPVCLEAR(sv);
2d259d92
CK		 1342 do {
1343 sv_catpvn(sv, begin, star - begin);
3280af22 1344 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK		 1345 begin = ++star;
1346 } while ((star = strchr(begin, '*')));
3d66d7bb
GS		 1347 if (*begin)
1348 sv_catpv(sv,begin);
2d259d92
CK		 1349 }
1350 else {
3280af22 1351 sv_catpv(sv,PL_inplace);
2d259d92 1352 }
c623bd54 1353#ifndef FLEXFILENAMES
7e30e49f
DIM		 1354 if ((PerlLIO_stat(SvPVX_const(sv),&statbuf) >= 0
1355 && statbuf.st_dev == filedev
1356 && statbuf.st_ino == fileino)
39e571d4 1357#ifdef DJGPP
5f74f29c 1358 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 1359#endif
f248d071
GS		 1360 )
1361 {
9b387841 1362 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
147e3846
KW		 1363 "Can't do inplace edit: %"
1364 SVf " would not be unique",
9b387841 1365 SVfARG(sv));
e0d4aead 1366 goto cleanup_argv;
c623bd54 1367 }
ff8e2863 1368#endif
e0d4aead 1369 av_store(magic_av, ARGVMG_BACKUP_NAME, newSVsv(sv));
a687059c
LW		 1370 }
1371
30fc4309 1372 sv_setpvn(sv,PL_oldname,oldlen);
748a9306 1373 SETERRNO(0,0); /* in case sprintf set errno */
e0d4aead
TC		 1374 temp_name_sv = newSV(0);
1375 if (!S_openindirtemp(aTHX_ PL_argvoutgv, GvSV(gv), temp_name_sv)) {
1376 SvREFCNT_dec(temp_name_sv);
1377 /* diag_listed_as: Can't do inplace edit on %s: %s */
1378 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: Cannot make temp name: %s",
9b387841 1379 PL_oldname, Strerror(errno) );
e0d4aead
TC		 1380#ifndef FLEXFILENAMES
1381 cleanup_argv:
1382#endif
1383 do_close(gv,FALSE);
1384 SvREFCNT_dec(magic_av);
1385 continue;
fe14fcc3 1386 }
e0d4aead
TC		 1387 av_store(magic_av, ARGVMG_TEMP_NAME, temp_name_sv);
1388 av_store(magic_av, ARGVMG_ORIG_NAME, newSVsv(sv));
1389 av_store(magic_av, ARGVMG_ORIG_MODE, newSVuv(PL_filemode));
05df5c88 1390 av_store(magic_av, ARGVMG_ORIG_PID, newSViv((IV)PerlProc_getpid()));
1b4d0d79 1391#if defined(ARGV_USE_ATFUNCTIONS)
733612e0
TC		 1392 curdir = opendir(".");
1393 av_store(magic_av, ARGVMG_ORIG_DIRP, newSViv(PTR2IV(curdir)));
1b4d0d79 1394#elif defined(ARGV_USE_STAT_INO)
bb082417
TC		 1395 if (PerlLIO_stat(".", &statbuf) >= 0) {
1396 av_store(magic_av, ARGVMG_ORIG_CWD_STAT,
1397 newSVpvn((char *)&statbuf, sizeof(statbuf)));
1398 }
733612e0 1399#endif
3280af22 1400 setdefout(PL_argvoutgv);
dddabd86 1401 sv_setsv(GvSVn(PL_argvoutgv), temp_name_sv);
8ab93df0
TC		 1402 mg = sv_magicext((SV*)GvIOp(PL_argvoutgv), (SV*)magic_av, PERL_MAGIC_uvar, &argvout_vtbl, NULL, 0);
1403 mg->mg_flags |= MGf_DUP;
e0d4aead 1404 SvREFCNT_dec(magic_av);
3280af22 1405 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
375ed12a 1406 if (PL_lastfd >= 0) {
45a23732 1407 (void)PerlLIO_fstat(PL_lastfd,&statbuf);
fe14fcc3 1408#ifdef HAS_FCHMOD
375ed12a 1409 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 1410#else
375ed12a 1411 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
a687059c 1412#endif
45a23732 1413 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
b469f1e0 1414 /* XXX silently ignore failures */
fe14fcc3 1415#ifdef HAS_FCHOWN
b469f1e0 1416 PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid));
4009c3ff 1417#elif defined(HAS_CHOWN)
b469f1e0 1418 PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid));
a687059c 1419#endif
375ed12a 1420 }
fe14fcc3 1421 }
d8015975 1422 return IoIFP(GvIOp(gv));
a687059c 1423 }
d8015975
NC		 1424 } /* successful do_open_raw(), PL_inplace non-NULL */
1425
1426 if (ckWARN_d(WARN_INPLACE)) {
1427 const int eno = errno;
7e30e49f 1428 Stat_t statbuf;
45a23732
DD		 1429 if (PerlLIO_stat(PL_oldname, &statbuf) >= 0
1430 && !S_ISREG(statbuf.st_mode)) {
d8015975
NC		 1431 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
1432 "Can't do inplace edit: %s is not a regular file",
1433 PL_oldname);
1434 }
1435 else {
1436 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
1437 PL_oldname, Strerror(eno));
1438 }
4d61ec05 1439 }
a687059c 1440 }
18708f5a
GS		 1441 if (io && (IoFLAGS(io) & IOf_ARGV))
1442 IoFLAGS(io) |= IOf_START;
3280af22 1443 if (PL_inplace) {
7a1c5554
GS		 1444 if (io && (IoFLAGS(io) & IOf_ARGV)
1445 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
1446 {
159b6efe 1447 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
18708f5a 1448 setdefout(oldout);
8e217d4a 1449 SvREFCNT_dec_NN(oldout);
4608196e 1450 return NULL;
18708f5a 1451 }
fafc274c 1452 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 1453 }
4608196e 1454 return NULL;
a687059c
LW		 1455}
1456
84dbe61c
TC		 1457#ifdef ARGV_USE_ATFUNCTIONS
1458# if defined(__FreeBSD__)
1459
1460/* FreeBSD 11 renameat() mis-behaves strangely with absolute paths in cases where the
1461 * equivalent rename() succeeds
1462 */
1463static int
1464S_my_renameat(int olddfd, const char *oldpath, int newdfd, const char *newpath) {
1465 /* this is intended only for use in Perl_do_close() */
1466 assert(olddfd == newdfd);
1467 assert(PERL_FILE_IS_ABSOLUTE(oldpath) == PERL_FILE_IS_ABSOLUTE(newpath));
1468 if (PERL_FILE_IS_ABSOLUTE(oldpath)) {
1469 return PerlLIO_rename(oldpath, newpath);
1470 }
1471 else {
1472 return renameat(olddfd, oldpath, newdfd, newpath);
1473 }
1474}
1475
1476# else
1477# define S_my_renameat(dh1, pv1, dh2, pv2) renameat((dh1), (pv1), (dh2), (pv2))
1478# endif /* if defined(__FreeBSD__) */
1479#endif
1480
184f90dc 1481static bool
848643a9 1482S_dir_unchanged(pTHX_ const char *orig_pv, MAGIC *mg) {
184f90dc
TC		 1483 Stat_t statbuf;
1484
1485#ifdef ARGV_USE_STAT_INO
1486 SV **stat_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_CWD_STAT, FALSE);
1487 Stat_t *orig_cwd_stat = stat_psv && *stat_psv ? (Stat_t *)SvPVX(*stat_psv) : NULL;
1488
1489 /* if the path is absolute the possible moving of cwd (which the file
1490 might be in) isn't our problem.
1491 This code tries to be reasonably balanced about detecting a changed
1492 CWD, if we have the information needed to check that curdir has changed, we
1493 check it
1494 */
1495 if (!PERL_FILE_IS_ABSOLUTE(orig_pv)
1496 && orig_cwd_stat
1497 && PerlLIO_stat(".", &statbuf) >= 0
1498 && ( statbuf.st_dev != orig_cwd_stat->st_dev
1499 || statbuf.st_ino != orig_cwd_stat->st_ino)) {
1500 Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s",
1501 orig_pv, "Current directory has changed");
1502 }
1503#else
1504 SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
1505
1506 /* Some platforms don't have useful st_ino etc, so just
1507 check we can see the work file.
1508 */
1509 if (!PERL_FILE_IS_ABSOLUTE(orig_pv)
1510 && PerlLIO_stat(SvPVX(*temp_psv), &statbuf) < 0) {
3c67ad9b 1511 Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s",
a06de4dc 1512 orig_pv,
184f90dc
TC		 1513 "Work file is missing - did you change directory?");
1514 }
1515#endif
1516
1517 return TRUE;
1518}
1519
848643a9
TC		 1520#define dir_unchanged(orig_psv, mg) \
1521 S_dir_unchanged(aTHX_ (orig_psv), (mg))
184f90dc 1522
517844ec 1523/* explicit renamed to avoid C++ conflict -- kja */
a687059c 1524bool
864dbfa3 1525Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 1526{
1193dd27
IZ		 1527 bool retval;
1528 IO *io;
e0d4aead 1529 MAGIC *mg;
a687059c 1530
79072805 1531 if (!gv)
3280af22 1532 gv = PL_argvgv;
6e592b3a 1533 if (!gv || !isGV_with_GP(gv)) {
1d2dff63 1534 if (not_implicit)
93189314 1535 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 1536 return FALSE;
99b89507 1537 }
79072805
LW		 1538 io = GvIO(gv);
1539 if (!io) { /* never opened */
1d2dff63 1540 if (not_implicit) {
51087808 1541 report_evil_fh(gv);
93189314 1542 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 1543 }
a687059c
LW		 1544 return FALSE;
1545 }
e0d4aead
TC		 1546 if ((mg = mg_findext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl))
1547 && mg->mg_obj) {
1548 /* handle to an in-place edit work file */
1549 SV **back_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_BACKUP_NAME, FALSE);
1550 SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
1551 /* PL_oldname may have been modified by a nested ARGV use at this point */
1552 SV **orig_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_NAME, FALSE);
1553 SV **mode_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_MODE, FALSE);
05df5c88 1554 SV **pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE);
1b4d0d79 1555#if defined(ARGV_USE_ATFUNCTIONS)
05df5c88 1556 SV **dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE);
733612e0
TC		 1557 DIR *dir;
1558 int dfd;
1b4d0d79 1559#endif
e0d4aead
TC		 1560 UV mode;
1561 int fd;
1562
1563 const char *orig_pv;
1564
1565 assert(temp_psv && *temp_psv);
1566 assert(orig_psv && *orig_psv);
1567 assert(mode_psv && *mode_psv);
05df5c88 1568 assert(pid_psv && *pid_psv);
733612e0
TC		 1569#ifdef ARGV_USE_ATFUNCTIONS
1570 assert(dir_psv && *dir_psv);
1571 dir = INT2PTR(DIR *, SvIVX(*dir_psv));
1572 dfd = my_dirfd(dir);
1573#endif
e0d4aead
TC		 1574
1575 orig_pv = SvPVX(*orig_psv);
e0d4aead
TC		 1576 mode = SvUV(*mode_psv);
1577
1578 if ((mode & (S_ISUID|S_ISGID)) != 0
1579 && (fd = PerlIO_fileno(IoIFP(io))) >= 0) {
1580 (void)PerlIO_flush(IoIFP(io));
1581#ifdef HAS_FCHMOD
1582 (void)fchmod(fd, mode);
1583#else
1584 (void)PerlLIO_chmod(orig_pv, mode);
1585#endif
1586 }
1587
1588 retval = io_close(io, NULL, not_implicit, FALSE);
1589
05df5c88
TC		 1590 if (SvIV(*pid_psv) != (IV)PerlProc_getpid()) {
1591 /* this is a child process, don't duplicate our rename() etc
1592 processing below */
1593 goto freext;
1594 }
1595
e0d4aead
TC		 1596 if (retval) {
1597#if defined(DOSISH) || defined(__CYGWIN__)
1598 if (PL_argvgv && GvIOp(PL_argvgv)
1599 && IoIFP(GvIOp(PL_argvgv))
1600 && (IoFLAGS(GvIOp(PL_argvgv)) & (IOf_ARGV|IOf_START)) == IOf_ARGV) {
1601 do_close(PL_argvgv, FALSE);
1602 }
1603#endif
184f90dc 1604#ifndef ARGV_USE_ATFUNCTIONS
848643a9 1605 if (!dir_unchanged(orig_pv, mg))
184f90dc
TC		 1606 goto abort_inplace;
1607#endif
e0d4aead
TC		 1608 if (back_psv && *back_psv) {
1609#if defined(HAS_LINK) && !defined(DOSISH) && !defined(__CYGWIN__) && defined(HAS_RENAME)
733612e0
TC		 1610 if (
1611# ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1612 linkat(dfd, orig_pv, dfd, SvPVX(*back_psv), 0) < 0 &&
1613 !(UNLIKELY(NotSupported(errno)) &&
848643a9 1614 dir_unchanged(orig_pv, mg) &&
184f90dc 1615 link(orig_pv, SvPVX(*back_psv)) == 0)
733612e0
TC		 1616# else
1617 link(orig_pv, SvPVX(*back_psv)) < 0
1618# endif
1619 )
e0d4aead
TC		 1620#endif
1621 {
1622#ifdef HAS_RENAME
733612e0
TC		 1623 if (
1624# ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1625 S_my_renameat(dfd, orig_pv, dfd, SvPVX(*back_psv)) < 0 &&
1626 !(UNLIKELY(NotSupported(errno)) &&
848643a9 1627 dir_unchanged(orig_pv, mg) &&
184f90dc 1628 PerlLIO_rename(orig_pv, SvPVX(*back_psv)) == 0)
733612e0
TC		 1629# else
1630 PerlLIO_rename(orig_pv, SvPVX(*back_psv)) < 0
1631# endif
1632 ) {
e0d4aead 1633 if (!not_implicit) {
83419aa9 1634# ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1635 if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 &&
1636 UNLIKELY(NotSupported(errno)) &&
848643a9 1637 dir_unchanged(orig_pv, mg))
184f90dc 1638 (void)UNLINK(SvPVX_const(*temp_psv));
83419aa9
TC		 1639# else
1640 UNLINK(SvPVX(*temp_psv));
1641# endif
e0d4aead
TC		 1642 Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file",
1643 SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno));
1644 }
1645 /* should we warn here? */
1646 goto abort_inplace;
1647 }
1648#else
1649 (void)UNLINK(SvPVX(*back_psv));
1650 if (link(orig_pv, SvPVX(*back_psv))) {
1651 if (!not_implicit) {
1652 Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file",
1653 SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno));
1654 }
1655 goto abort_inplace;
1656 }
1657 /* we need to use link() to get the temp into place too, and linK()
1658 fails if the new link name exists */
1659 (void)UNLINK(orig_pv);
1660#endif
1661 }
1662 }
1663#if defined(DOSISH) || defined(__CYGWIN__) || !defined(HAS_RENAME)
1664 else {
1665 UNLINK(orig_pv);
1666 }
1667#endif
1668 if (
4009c3ff
AC		 1669#if !defined(HAS_RENAME)
1670 link(SvPVX(*temp_psv), orig_pv) < 0
1671#elif defined(ARGV_USE_ATFUNCTIONS)
184f90dc
TC		 1672 S_my_renameat(dfd, SvPVX(*temp_psv), dfd, orig_pv) < 0 &&
1673 !(UNLIKELY(NotSupported(errno)) &&
848643a9 1674 dir_unchanged(orig_pv, mg) &&
184f90dc 1675 PerlLIO_rename(SvPVX(*temp_psv), orig_pv) == 0)
e0d4aead 1676#else
4009c3ff 1677 PerlLIO_rename(SvPVX(*temp_psv), orig_pv) < 0
e0d4aead
TC		 1678#endif
1679 ) {
1680 if (!not_implicit) {
dddabd86 1681#ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1682 if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 &&
1683 NotSupported(errno))
1684 UNLINK(SvPVX(*temp_psv));
dddabd86
TC		 1685#else
1686 UNLINK(SvPVX(*temp_psv));
1687#endif
3c67ad9b
TC		 1688 /* diag_listed_as: Cannot complete in-place edit of %s: %s */
1689 Perl_croak(aTHX_ "Cannot complete in-place edit of %s: failed to rename work file '%s' to '%s': %s",
1690 orig_pv, SvPVX(*temp_psv), orig_pv, Strerror(errno));
e0d4aead
TC		 1691 }
1692 abort_inplace:
1693 UNLINK(SvPVX_const(*temp_psv));
1694 retval = FALSE;
1695 }
1696#ifndef HAS_RENAME
1697 UNLINK(SvPVX(*temp_psv));
1698#endif
1699 }
1700 else {
733612e0 1701#ifdef ARGV_USE_ATFUNCTIONS
184f90dc
TC		 1702 if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) &&
1703 NotSupported(errno))
1704 UNLINK(SvPVX_const(*temp_psv));
1705
733612e0 1706#else
e0d4aead 1707 UNLINK(SvPVX_const(*temp_psv));
733612e0 1708#endif
e0d4aead
TC		 1709 if (!not_implicit) {
1710 Perl_croak(aTHX_ "Failed to close in-place work file %s: %s",
1711 SvPVX(*temp_psv), Strerror(errno));
1712 }
1713 }
05df5c88 1714 freext:
e0d4aead
TC		 1715 mg_freeext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl);
1716 }
1717 else {
1718 retval = io_close(io, NULL, not_implicit, FALSE);
1719 }
517844ec 1720 if (not_implicit) {
1193dd27
IZ		 1721 IoLINES(io) = 0;
1722 IoPAGE(io) = 0;
1723 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1724 }
50952442 1725 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ		 1726 return retval;
1727}
1728
1729bool
96d7c888 1730Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail)
1193dd27
IZ		 1731{
1732 bool retval = FALSE;
1193dd27 1733
7918f24d
NC		 1734 PERL_ARGS_ASSERT_IO_CLOSE;
1735
8990e307 1736 if (IoIFP(io)) {
50952442 1737 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 1738 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 1739 if (not_implicit) {
37038d91 1740 STATUS_NATIVE_CHILD_SET(status);
e5218da5 1741 retval = (STATUS_UNIX == 0);
f2b5be74
GS		 1742 }
1743 else {
1744 retval = (status != -1);
1745 }
a687059c 1746 }
50952442 1747 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW		 1748 retval = TRUE;
1749 else {
8990e307 1750 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 1751 const bool prev_err = PerlIO_error(IoOFP(io));
f4725fad
FC		 1752#ifdef USE_PERLIO
1753 if (prev_err)
1754 PerlIO_restore_errno(IoOFP(io));
1755#endif
e199e3be 1756 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 1757 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 1758 }
e199e3be 1759 else {
0bcc34c2 1760 const bool prev_err = PerlIO_error(IoIFP(io));
f4725fad
FC		 1761#ifdef USE_PERLIO
1762 if (prev_err)
1763 PerlIO_restore_errno(IoIFP(io));
1764#endif
e199e3be
RGS		 1765 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1766 }
a687059c 1767 }
4608196e 1768 IoOFP(io) = IoIFP(io) = NULL;
96d7c888
FC		 1769
1770 if (warn_on_fail && !retval) {
1771 if (gv)
1772 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1773 "Warning: unable to close filehandle %"
147e3846 1774 HEKf " properly: %" SVf,
ac892e4a
DM		 1775 HEKfARG(GvNAME_HEK(gv)),
1776 SVfARG(get_sv("!",GV_ADD)));
96d7c888
FC		 1777 else
1778 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1779 "Warning: unable to close filehandle "
147e3846 1780 "properly: %" SVf,
ac892e4a 1781 SVfARG(get_sv("!",GV_ADD)));
96d7c888 1782 }
79072805 1783 }
f2b5be74 1784 else if (not_implicit) {
93189314 1785 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 1786 }
1193dd27 1787
a687059c
LW		 1788 return retval;
1789}
1790
1791bool
864dbfa3 1792Perl_do_eof(pTHX_ GV *gv)
a687059c 1793{
eb578fdb 1794 IO * const io = GvIO(gv);
a687059c 1795
7918f24d
NC		 1796 PERL_ARGS_ASSERT_DO_EOF;
1797
79072805 1798 if (!io)
a687059c 1799 return TRUE;
7716c5c5 1800 else if (IoTYPE(io) == IoTYPE_WRONLY)
a5390457 1801 report_wrongway_fh(gv, '>');
a687059c 1802
8990e307 1803 while (IoIFP(io)) {
760ac839 1804 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1805 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW		 1806 return FALSE; /* this is the most usual case */
1807 }
a687059c 1808
79852593
NC		 1809 {
1810 /* getc and ungetc can stomp on errno */
4ee39169 1811 dSAVE_ERRNO;
79852593
NC		 1812 const int ch = PerlIO_getc(IoIFP(io));
1813 if (ch != EOF) {
1814 (void)PerlIO_ungetc(IoIFP(io),ch);
4ee39169 1815 RESTORE_ERRNO;
79852593
NC		 1816 return FALSE;
1817 }
4ee39169 1818 RESTORE_ERRNO;
a687059c 1819 }
fab3f3a7 1820
760ac839 1821 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH		 1822 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1823 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1824 }
533c011a 1825 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
157fb5a1 1826 if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */
a687059c
LW		 1827 return TRUE;
1828 }
1829 else
1830 return TRUE; /* normal fp, definitely end of file */
1831 }
1832 return TRUE;
1833}
1834
5ff3f7a4 1835Off_t
864dbfa3 1836Perl_do_tell(pTHX_ GV *gv)
a687059c 1837{
9c9f25b8 1838 IO *const io = GvIO(gv);
eb578fdb 1839 PerlIO *fp;
a687059c 1840
7918f24d
NC		 1841 PERL_ARGS_ASSERT_DO_TELL;
1842
9c9f25b8 1843 if (io && (fp = IoIFP(io))) {
8903cb82 1844 return PerlIO_tell(fp);
96e4d5b1 1845 }
51087808 1846 report_evil_fh(gv);
93189314 1847 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1848 return (Off_t)-1;
a687059c
LW		 1849}
1850
1851bool
864dbfa3 1852Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1853{
9c9f25b8 1854 IO *const io = GvIO(gv);
eb578fdb 1855 PerlIO *fp;
a687059c 1856
9c9f25b8 1857 if (io && (fp = IoIFP(io))) {
8903cb82 1858 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1859 }
51087808 1860 report_evil_fh(gv);
93189314 1861 SETERRNO(EBADF,RMS_IFI);
a687059c
LW		 1862 return FALSE;
1863}
1864
97cc44eb 1865Off_t
864dbfa3 1866Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1867{
9c9f25b8 1868 IO *const io = GvIO(gv);
eb578fdb 1869 PerlIO *fp;
8903cb82 1870
7918f24d
NC		 1871 PERL_ARGS_ASSERT_DO_SYSSEEK;
1872
375ed12a
JH		 1873 if (io && (fp = IoIFP(io))) {
1874 int fd = PerlIO_fileno(fp);
07bd88da
JH		 1875 if (fd < 0 || (whence == SEEK_SET && pos < 0)) {
1876 SETERRNO(EINVAL,LIB_INVARG);
1877 return -1;
1878 } else {
375ed12a
JH		 1879 return PerlLIO_lseek(fd, pos, whence);
1880 }
1881 }
51087808 1882 report_evil_fh(gv);
93189314 1883 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1884 return (Off_t)-1;
8903cb82 1885}
1886
6ff81951 1887int
a79b25b7 1888Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
16fe6d59
GS		 1889{
1890 int mode = O_BINARY;
81611534 1891 PERL_UNUSED_CONTEXT;
a79b25b7 1892 if (s) {
16fe6d59
GS		 1893 while (*s) {
1894 if (*s == ':') {
1895 switch (s[1]) {
1896 case 'r':
e963d6d2 1897 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS		 1898 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1899 {
1900 mode = O_BINARY;
1901 s += 4;
1902 len -= 4;
1903 break;
1904 }
924ba076 1905 /* FALLTHROUGH */
16fe6d59 1906 case 'c':
e963d6d2 1907 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS		 1908 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1909 {
1910 mode = O_TEXT;
1911 s += 5;
1912 len -= 5;
1913 break;
1914 }
924ba076 1915 /* FALLTHROUGH */
16fe6d59
GS		 1916 default:
1917 goto fail_discipline;
1918 }
1919 }
1920 else if (isSPACE(*s)) {
1921 ++s;
1922 --len;
1923 }
1924 else {
4373e329 1925 const char *end;
7b52d656 1926 fail_discipline:
9a73c0b8 1927 end = (char *) memchr(s+1, ':', len);
16fe6d59
GS		 1928 if (!end)
1929 end = s+len;
60382766 1930#ifndef PERLIO_LAYERS
363c40c4 1931 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1932#else
18a33fb5 1933 len -= end-s;
60382766
NIS		 1934 s = end;
1935#endif
16fe6d59
GS		 1936 }
1937 }
1938 }
1939 return mode;
1940}
1941
58e24eff 1942#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH		 1943I32
1944my_chsize(int fd, Off_t length)
6eb13c3b 1945{
58e24eff
SH		 1946#ifdef F_FREESP
1947 /* code courtesy of William Kucharski */
1948#define HAS_CHSIZE
1949
c623ac67 1950 Stat_t filebuf;
6eb13c3b 1951
3028581b 1952 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW		 1953 return -1;
1954
1955 if (filebuf.st_size < length) {
1956
1957 /* extend file length */
1958
3028581b 1959 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW		 1960 return -1;
1961
1962 /* write a "0" byte */
1963
3028581b 1964 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW		 1965 return -1;
1966 }
1967 else {
1968 /* truncate length */
35da51f7 1969 struct flock fl;
6eb13c3b
LW		 1970 fl.l_whence = 0;
1971 fl.l_len = 0;
1972 fl.l_start = length;
a0d0e21e 1973 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW		 1974
1975 /*
a0d0e21e 1976 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW		 1977 * fcntl(2), which truncates the file so that it ends at the
1978 * position indicated by fl.l_start.
1979 *
1980 * Will minor miracles never cease?
1981 */
1982
a0d0e21e 1983 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW		 1984 return -1;
1985
1986 }
6eb13c3b 1987 return 0;
58e24eff 1988#else
27da23d5 1989 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1990#endif /* F_FREESP */
27da23d5 1991 return -1;
58e24eff
SH		 1992}
1993#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1994
a687059c 1995bool
5aaab254 1996Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
a687059c 1997{
7918f24d
NC		 1998 PERL_ARGS_ASSERT_DO_PRINT;
1999
79072805
LW		 2000 /* assuming fp is checked earlier */
2001 if (!sv)
2002 return TRUE;
e9950d3b
NC		 2003 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
2004 assert(!SvGMAGICAL(sv));
2005 if (SvIsUV(sv))
147e3846 2006 PerlIO_printf(fp, "%" UVuf, (UV)SvUVX(sv));
e9950d3b 2007 else
147e3846 2008 PerlIO_printf(fp, "%" IVdf, (IV)SvIVX(sv));
e9950d3b
NC		 2009 return !PerlIO_error(fp);
2010 }
2011 else {
2012 STRLEN len;
676f44e7 2013 /* Do this first to trigger any overloading. */
e9950d3b
NC		 2014 const char *tmps = SvPV_const(sv, len);
2015 U8 *tmpbuf = NULL;
2016 bool happy = TRUE;
2017
d791f93f
KW		 2018 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
2019 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
676f44e7
NC		 2020 /* We don't modify the original scalar. */
2021 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
2022 tmps = (char *) tmpbuf;
2023 }
a099aed4 2024 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
0876b9a0
KW		 2025 (void) check_utf8_print((const U8*) tmps, len);
2026 }
d791f93f
KW		 2027 } /* else stream isn't utf8 */
2028 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
2029 convert to bytes */
676f44e7
NC		 2030 STRLEN tmplen = len;
2031 bool utf8 = TRUE;
35da51f7 2032 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7 2033 if (!utf8) {
d791f93f
KW		 2034
2035 /* Here, succeeded in downgrading from utf8. Set up to below
2036 * output the converted value */
676f44e7
NC		 2037 tmpbuf = result;
2038 tmps = (char *) tmpbuf;
2039 len = tmplen;
2040 }
d791f93f
KW		 2041 else { /* Non-utf8 output stream, but string only representable in
2042 utf8 */
676f44e7 2043 assert((char *)result == tmps);
9b387841 2044 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
21630838
FC		 2045 "Wide character in %s",
2046 PL_op ? OP_DESC(PL_op) : "print"
2047 );
0876b9a0
KW		 2048 /* Could also check that isn't one of the things to avoid
2049 * in utf8 by using check_utf8_print(), but not doing so,
2050 * since the stream isn't a UTF8 stream */
ae798467
NIS		 2051 }
2052 }
e9950d3b
NC		 2053 /* To detect whether the process is about to overstep its
2054 * filesize limit we would need getrlimit(). We could then
2055 * also transparently raise the limit with setrlimit() --
2056 * but only until the system hard limit/the filesystem limit,
2057 * at which we would get EPERM. Note that when using buffered
2058 * io the write failure can be delayed until the flush/close. --jhi */
2059 if (len && (PerlIO_write(fp,tmps,len) == 0))
2060 happy = FALSE;
2061 Safefree(tmpbuf);
2062 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 2063 }
a687059c
LW		 2064}
2065
79072805 2066I32
0d7d409d 2067Perl_my_stat_flags(pTHX_ const U32 flags)
a687059c 2068{
39644a26 2069 dSP;
79072805 2070 IO *io;
2dd78f96 2071 GV* gv;
79072805 2072
533c011a 2073 if (PL_op->op_flags & OPf_REF) {
2dd78f96 2074 gv = cGVOP_gv;
748a9306 2075 do_fstat:
97c8f3e6
Z		 2076 if (gv == PL_defgv) {
2077 if (PL_laststatval < 0)
2078 SETERRNO(EBADF,RMS_IFI);
5228a96c 2079 return PL_laststatval;
97c8f3e6 2080 }
2dd78f96 2081 io = GvIO(gv);
ad02613c 2082 do_fstat_have_io:
5228a96c 2083 PL_laststype = OP_STAT;
bd5f6c01 2084 PL_statgv = gv ? gv : (GV *)io;
8062ff11 2085 SvPVCLEAR(PL_statname);
77616968 2086 if (io) {
5228a96c 2087 if (IoIFP(io)) {
375ed12a 2088 int fd = PerlIO_fileno(IoIFP(io));
77616968
JH		 2089 if (fd < 0) {
2090 /* E.g. PerlIO::scalar has no real fd. */
97c8f3e6 2091 SETERRNO(EBADF,RMS_IFI);
77616968
JH		 2092 return (PL_laststatval = -1);
2093 } else {
375ed12a
JH		 2094 return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
2095 }
5228a96c 2096 } else if (IoDIRP(io)) {
3497a01f 2097 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c 2098 }
5228a96c 2099 }
3888144c
FC		 2100 PL_laststatval = -1;
2101 report_evil_fh(gv);
97c8f3e6 2102 SETERRNO(EBADF,RMS_IFI);
3888144c 2103 return -1;
a687059c 2104 }
d2c4d2d1 2105 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
8db8f6b6
FC		 2106 == OPpFT_STACKED)
2107 return PL_laststatval;
d2c4d2d1
FC		 2108 else {
2109 SV* const sv = TOPs;
a155eb05 2110 const char *s, *d;
4ecd490c 2111 STRLEN len;
094a3eec 2112 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
748a9306
LW		 2113 goto do_fstat;
2114 }
ad02613c 2115 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
a45c7426 2116 io = MUTABLE_IO(SvRV(sv));
7f39519f 2117 gv = NULL;
ad02613c
SP		 2118 goto do_fstat_have_io;
2119 }
748a9306 2120
0d7d409d 2121 s = SvPV_flags_const(sv, len, flags);
a0714e2c 2122 PL_statgv = NULL;
4ecd490c 2123 sv_setpvn(PL_statname, s, len);
a155eb05 2124 d = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22 2125 PL_laststype = OP_STAT;
a155eb05
TC		 2126 if (!IS_SAFE_PATHNAME(s, len, OP_NAME(PL_op))) {
2127 PL_laststatval = -1;
2128 }
2129 else {
2130 PL_laststatval = PerlLIO_stat(d, &PL_statcache);
2131 }
7cb3f959 2132 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
7347ee54 2133 GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
9014280d 2134 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
7347ee54 2135 GCC_DIAG_RESTORE_STMT;
5d37acd6 2136 }
3280af22 2137 return PL_laststatval;
a687059c
LW		 2138 }
2139}
2140
fbb0b3b3 2141
79072805 2142I32
0d7d409d 2143Perl_my_lstat_flags(pTHX_ const U32 flags)
c623bd54 2144{
a1894d81 2145 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
39644a26 2146 dSP;
b16276bb 2147 const char *file;
a155eb05 2148 STRLEN len;
cd22fad3 2149 SV* const sv = TOPs;
5840701a 2150 bool isio = FALSE;
533c011a 2151 if (PL_op->op_flags & OPf_REF) {
638eceb6 2152 if (cGVOP_gv == PL_defgv) {
3280af22 2153 if (PL_laststype != OP_LSTAT)
0157ef98 2154 Perl_croak(aTHX_ "%s", no_prev_lstat);
97c8f3e6
Z		 2155 if (PL_laststatval < 0)
2156 SETERRNO(EBADF,RMS_IFI);
3280af22 2157 return PL_laststatval;
fe14fcc3 2158 }
31b139ba 2159 PL_laststatval = -1;
5d3e98de 2160 if (ckWARN(WARN_IO)) {
5840701a 2161 /* diag_listed_as: Use of -l on filehandle%s */
d0c0e7dd 2162 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 2163 "Use of -l on filehandle %" HEKf,
d0c0e7dd 2164 HEKfARG(GvENAME_HEK(cGVOP_gv)));
5d3e98de 2165 }
97c8f3e6 2166 SETERRNO(EBADF,RMS_IFI);
31b139ba 2167 return -1;
fe14fcc3 2168 }
8db8f6b6
FC		 2169 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
2170 == OPpFT_STACKED) {
1f26655e 2171 if (PL_laststype != OP_LSTAT)
0157ef98 2172 Perl_croak(aTHX_ "%s", no_prev_lstat);
1f26655e 2173 return PL_laststatval;
cd22fad3 2174 }
c623bd54 2175
3280af22 2176 PL_laststype = OP_LSTAT;
a0714e2c 2177 PL_statgv = NULL;
5840701a
FC		 2178 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
2179 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
2180 )
2181 || isGV_with_GP(sv)
2182 )
2183 && ckWARN(WARN_IO)) {
2184 if (isio)
2185 /* diag_listed_as: Use of -l on filehandle%s */
2186 Perl_warner(aTHX_ packWARN(WARN_IO),
2187 "Use of -l on filehandle");
2188 else
2189 /* diag_listed_as: Use of -l on filehandle%s */
2190 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 2191 "Use of -l on filehandle %" HEKf,
10bafe90
BF		 2192 HEKfARG(GvENAME_HEK((const GV *)
2193 (SvROK(sv) ? SvRV(sv) : sv))));
cd22fad3 2194 }
a155eb05 2195 file = SvPV_flags_const(sv, len, flags);
b16276bb 2196 sv_setpv(PL_statname,file);
a155eb05
TC		 2197 if (!IS_SAFE_PATHNAME(file, len, OP_NAME(PL_op))) {
2198 PL_laststatval = -1;
2199 }
2200 else {
2201 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
2202 }
7cb3f959 2203 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
7347ee54 2204 GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
5d37acd6 2205 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
7347ee54 2206 GCC_DIAG_RESTORE_STMT;
5d37acd6 2207 }
3280af22 2208 return PL_laststatval;
c623bd54
LW		 2209}
2210
a0f2c8ec
JD		 2211static void
2212S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
2213{
2214 const int e = errno;
7918f24d 2215 PERL_ARGS_ASSERT_EXEC_FAILED;
738ab09f
AB		 2216
2217 if (ckWARN(WARN_EXEC))
2218 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
2219 cmd, Strerror(e));
a0f2c8ec 2220 if (do_report) {
b469f1e0
JH		 2221 /* XXX silently ignore failures */
2222 PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int)));
a0f2c8ec
JD		 2223 PerlLIO_close(fd);
2224 }
2225}
2226
738ab09f 2227bool
5aaab254 2228Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
2aa1486d 2229 int fd, int do_report)
d5a9bfb0 2230{
27da23d5 2231 dVAR;
7918f24d 2232 PERL_ARGS_ASSERT_DO_AEXEC5;
e37778c2 2233#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH		 2234 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
2235#else
2fcab330 2236 assert(sp >= mark);
282fc0b3 2237 ENTER;
2fcab330 2238 {
282fc0b3 2239 const char **argv, **a;
6136c704 2240 const char *tmps = NULL;
282fc0b3
Z		 2241 Newx(argv, sp - mark + 1, const char*);
2242 SAVEFREEPV(argv);
2243 a = argv;
890ce7af 2244
79072805 2245 while (++mark <= sp) {
282fc0b3
Z		 2246 if (*mark) {
2247 char *arg = savepv(SvPV_nolen_const(*mark));
2248 SAVEFREEPV(arg);
2249 *a++ = arg;
2250 } else
a687059c
LW		 2251 *a++ = "";
2252 }
6136c704 2253 *a = NULL;
282fc0b3
Z		 2254 if (really) {
2255 tmps = savepv(SvPV_nolen_const(really));
2256 SAVEFREEPV(tmps);
2257 }
2258 if ((!really && argv[0] && *argv[0] != '/') ||
91b2752f 2259 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 2260 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 2261 PERL_FPU_PRE_EXEC
839a9f02 2262 if (really && *tmps) {
282fc0b3
Z		 2263 PerlProc_execvp(tmps,EXEC_ARGV_CAST(argv));
2264 } else if (argv[0]) {
2265 PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv));
2fcab330
DIM		 2266 } else {
2267 SETERRNO(ENOENT,RMS_FNF);
2268 }
b35112e7 2269 PERL_FPU_POST_EXEC
282fc0b3 2270 S_exec_failed(aTHX_ (really ? tmps : argv[0] ? argv[0] : ""), fd, do_report);
a687059c 2271 }
282fc0b3 2272 LEAVE;
cd39f2b6 2273#endif
738ab09f 2274 return FALSE;
a687059c
LW		 2275}
2276
9555a685 2277#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8 2278
738ab09f 2279bool
2fbb330f 2280Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 2281{
27da23d5 2282 dVAR;
282fc0b3 2283 const char **argv, **a;
eb578fdb 2284 char *s;
15db3ae2 2285 char *buf;
2fbb330f 2286 char *cmd;
2fbb330f 2287 /* Make a copy so we can change it */
6fca0082 2288 const Size_t cmdlen = strlen(incmd) + 1;
7918f24d
NC		 2289
2290 PERL_ARGS_ASSERT_DO_EXEC3;
2291
282fc0b3 2292 ENTER;
15db3ae2 2293 Newx(buf, cmdlen, char);
282fc0b3 2294 SAVEFREEPV(buf);
15db3ae2 2295 cmd = buf;
cfff9797 2296 memcpy(cmd, incmd, cmdlen);
a687059c 2297
748a9306
LW		 2298 while (*cmd && isSPACE(*cmd))
2299 cmd++;
2300
a687059c
LW		 2301 /* save an extra exec if possible */
2302
bf38876a 2303#ifdef CSH
d05c1ba0 2304 {
0c19750d 2305 char flags[PERL_FLAGS_MAX];
d05c1ba0 2306 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
c8b388b0 2307 strBEGINs(cmd+PL_cshlen," -c")) {
28f0d0ec 2308 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH		 2309 s = cmd+PL_cshlen+3;
2310 if (*s == 'f') {
2311 s++;
28f0d0ec 2312 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH		 2313 }
2314 if (*s == ' ')
2315 s++;
2316 if (*s++ == '\'') {
0bcc34c2 2317 char * const ncmd = s;
d05c1ba0
JH		 2318
2319 while (*s)
2320 s++;
2321 if (s[-1] == '\n')
2322 *--s = '\0';
2323 if (s[-1] == '\'') {
2324 *--s = '\0';
b35112e7 2325 PERL_FPU_PRE_EXEC
738ab09f 2326 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 2327 PERL_FPU_POST_EXEC
d05c1ba0 2328 *s = '\'';
a0f2c8ec 2329 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
282fc0b3 2330 goto leave;
d05c1ba0
JH		 2331 }
2332 }
a687059c
LW		 2333 }
2334 }
bf38876a 2335#endif /* CSH */
a687059c
LW		 2336
2337 /* see if there are shell metacharacters in it */
2338
748a9306
LW		 2339 if (*cmd == '.' && isSPACE(cmd[1]))
2340 goto doshell;
2341
c8b388b0 2342 if (strBEGINs(cmd,"exec") && isSPACE(cmd[4]))
748a9306
LW		 2343 goto doshell;
2344
294b3b39 2345 s = cmd;
0eb30aeb 2346 while (isWORDCHAR(*s))
294b3b39 2347 s++; /* catch VAR=val gizmo */
63f2c1e1
LW		 2348 if (*s == '=')
2349 goto doshell;
748a9306 2350
a687059c 2351 for (s = cmd; *s; s++) {
d05c1ba0
JH		 2352 if (*s != ' ' && !isALPHA(*s) &&
2353 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW		 2354 if (*s == '\n' && !s[1]) {
2355 *s = '\0';
2356 break;
2357 }
603a98b0
IZ		 2358 /* handle the 2>&1 construct at the end */
2359 if (*s == '>' && s[1] == '&' && s[2] == '1'
2360 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
2361 && (!s[3] || isSPACE(s[3])))
2362 {
6867be6d 2363 const char *t = s + 3;
603a98b0
IZ		 2364
2365 while (*t && isSPACE(*t))
2366 ++t;
943bbd07 2367 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ		 2368 s[-2] = '\0';
2369 break;
2370 }
2371 }
a687059c 2372 doshell:
b35112e7 2373 PERL_FPU_PRE_EXEC
738ab09f 2374 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 2375 PERL_FPU_POST_EXEC
a0f2c8ec 2376 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
282fc0b3 2377 goto leave;
a687059c
LW		 2378 }
2379 }
748a9306 2380
282fc0b3
Z		 2381 Newx(argv, (s - cmd) / 2 + 2, const char*);
2382 SAVEFREEPV(argv);
2383 cmd = savepvn(cmd, s-cmd);
2384 SAVEFREEPV(cmd);
2385 a = argv;
2386 for (s = cmd; *s;) {
294b3b39
AL		 2387 while (isSPACE(*s))
2388 s++;
a687059c
LW		 2389 if (*s)
2390 *(a++) = s;
294b3b39
AL		 2391 while (*s && !isSPACE(*s))
2392 s++;
a687059c
LW		 2393 if (*s)
2394 *s++ = '\0';
2395 }
6136c704 2396 *a = NULL;
282fc0b3 2397 if (argv[0]) {
b35112e7 2398 PERL_FPU_PRE_EXEC
282fc0b3 2399 PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv));
b35112e7 2400 PERL_FPU_POST_EXEC
282fc0b3 2401 if (errno == ENOEXEC) /* for system V NIH syndrome */
a687059c 2402 goto doshell;
282fc0b3 2403 S_exec_failed(aTHX_ argv[0], fd, do_report);
a687059c 2404 }
282fc0b3
Z		 2405leave:
2406 LEAVE;
738ab09f 2407 return FALSE;
a687059c
LW		 2408}
2409
6890e559 2410#endif /* OS2 || WIN32 */
760ac839 2411
79072805 2412I32
5aaab254 2413Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
a687059c 2414{
eb578fdb
KW		 2415 I32 val;
2416 I32 tot = 0;
4634a855 2417 const char *const what = PL_op_name[type];
5c144d81 2418 const char *s;
84c7b88c 2419 STRLEN len;
890ce7af 2420 SV ** const oldmark = mark;
885b4b39 2421 bool killgp = FALSE;
a687059c 2422
7918f24d
NC		 2423 PERL_ARGS_ASSERT_APPLY;
2424
9a9b5ec9
DM		 2425 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
2426
1444765e
NC		 2427 /* Doing this ahead of the switch statement preserves the old behaviour,
2428 where attempting to use kill as a taint test test would fail on
2429 platforms where kill was not defined. */
2430#ifndef HAS_KILL
2431 if (type == OP_KILL)
4634a855 2432 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC		 2433#endif
2434#ifndef HAS_CHOWN
2435 if (type == OP_CHOWN)
4634a855 2436 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC		 2437#endif
2438
2439
20408e3c 2440#define APPLY_TAINT_PROPER() \
3280af22 2441 STMT_START { \
284167a5 2442 if (TAINT_get) { TAINT_PROPER(what); } \
873ef191 2443 } STMT_END
20408e3c
GS		 2444
2445 /* This is a first heuristic; it doesn't catch tainting magic. */
284167a5 2446 if (TAINTING_get) {
463ee0b2 2447 while (++mark <= sp) {
bbce6d69 2448 if (SvTAINTED(*mark)) {
2449 TAINT;
2450 break;
2451 }
463ee0b2
LW		 2452 }
2453 mark = oldmark;
2454 }
a687059c 2455 switch (type) {
79072805 2456 case OP_CHMOD:
20408e3c 2457 APPLY_TAINT_PROPER();
79072805 2458 if (++mark <= sp) {
4ea561bc 2459 val = SvIV(*mark);
20408e3c
GS		 2460 APPLY_TAINT_PROPER();
2461 tot = sp - mark;
79072805 2462 while (++mark <= sp) {
c4aca7d0 2463 GV* gv;
2ea1cce7 2464 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA		 2465 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2466#ifdef HAS_FCHMOD
375ed12a 2467 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
c4aca7d0 2468 APPLY_TAINT_PROPER();
375ed12a
JH		 2469 if (fd < 0) {
2470 SETERRNO(EBADF,RMS_IFI);
2471 tot--;
2472 } else if (fchmod(fd, val))
2473 tot--;
c4aca7d0 2474#else
b9c6780e 2475 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA		 2476#endif
2477 }
2478 else {
8334cae6 2479 SETERRNO(EBADF,RMS_IFI);
c4aca7d0
GA		 2480 tot--;
2481 }
2482 }
c4aca7d0 2483 else {
41188aa0 2484 const char *name = SvPV_nomg_const(*mark, len);
c4aca7d0 2485 APPLY_TAINT_PROPER();
41188aa0 2486 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
c8028aa6
TC		 2487 PerlLIO_chmod(name, val)) {
2488 tot--;
2489 }
c4aca7d0 2490 }
a687059c
LW		 2491 }
2492 }
2493 break;
fe14fcc3 2494#ifdef HAS_CHOWN
79072805 2495 case OP_CHOWN:
20408e3c 2496 APPLY_TAINT_PROPER();
79072805 2497 if (sp - mark > 2) {
eb578fdb 2498 I32 val2;
463ee0b2
LW		 2499 val = SvIVx(*++mark);
2500 val2 = SvIVx(*++mark);
20408e3c 2501 APPLY_TAINT_PROPER();
a0d0e21e 2502 tot = sp - mark;
79072805 2503 while (++mark <= sp) {
c4aca7d0 2504 GV* gv;
2ea1cce7 2505 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA		 2506 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2507#ifdef HAS_FCHOWN
375ed12a 2508 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
c4aca7d0 2509 APPLY_TAINT_PROPER();
375ed12a 2510 if (fd < 0) {
dd1dbff0 2511 SETERRNO(EBADF,RMS_IFI);
f95ba548 2512 tot--;
375ed12a 2513 } else if (fchown(fd, val, val2))
c4aca7d0
GA		 2514 tot--;
2515#else
b9c6780e 2516 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA		 2517#endif
2518 }
2519 else {
8334cae6 2520 SETERRNO(EBADF,RMS_IFI);
c4aca7d0
GA		 2521 tot--;
2522 }
2523 }
c4aca7d0 2524 else {
41188aa0 2525 const char *name = SvPV_nomg_const(*mark, len);
c4aca7d0 2526 APPLY_TAINT_PROPER();
41188aa0 2527 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
c8028aa6 2528 PerlLIO_chown(name, val, val2)) {
c4aca7d0 2529 tot--;
c8028aa6 2530 }
c4aca7d0 2531 }
a687059c
LW		 2532 }
2533 }
2534 break;
b1248f16 2535#endif
a1d180c4 2536/*
dd64f1c3
AD		 2537XXX Should we make lchown() directly available from perl?
2538For now, we'll let Configure test for HAS_LCHOWN, but do
2539nothing in the core.
2540 --AD 5/1998
2541*/
fe14fcc3 2542#ifdef HAS_KILL
79072805 2543 case OP_KILL:
20408e3c 2544 APPLY_TAINT_PROPER();
55497cff 2545 if (mark == sp)
2546 break;
84c7b88c 2547 s = SvPVx_const(*++mark, len);
c2fd40cb
DM		 2548 if (*s == '-' && isALPHA(s[1]))
2549 {
2550 s++;
2551 len--;
885b4b39 2552 killgp = TRUE;
c2fd40cb 2553 }
e02bfb16 2554 if (isALPHA(*s)) {
84c7b88c 2555 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
79072805 2556 s += 3;
84c7b88c
BF		 2557 len -= 3;
2558 }
2559 if ((val = whichsig_pvn(s, len)) < 0)
147e3846
KW		 2560 Perl_croak(aTHX_ "Unrecognized signal name \"%" SVf "\"",
2561 SVfARG(*mark));
79072805
LW		 2562 }
2563 else
c2fd40cb 2564 {
4ea561bc 2565 val = SvIV(*mark);
c2fd40cb
DM		 2566 if (val < 0)
2567 {
885b4b39 2568 killgp = TRUE;
c2fd40cb
DM		 2569 val = -val;
2570 }
2571 }
20408e3c
GS		 2572 APPLY_TAINT_PROPER();
2573 tot = sp - mark;
fbcd93f0 2574
c2fd40cb 2575 while (++mark <= sp) {
60082291 2576 Pid_t proc;
c2fd40cb 2577 SvGETMAGIC(*mark);
60082291 2578 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
c2fd40cb
DM		 2579 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
2580 proc = SvIV_nomg(*mark);
c2fd40cb 2581 APPLY_TAINT_PROPER();
111f73b5
DM		 2582#ifdef HAS_KILLPG
2583 /* use killpg in preference, as the killpg() wrapper for Win32
2584 * understands process groups, but the kill() wrapper doesn't */
2585 if (killgp ? PerlProc_killpg(proc, val)
2586 : PerlProc_kill(proc, val))
2587#else
2588 if (PerlProc_kill(killgp ? -proc: proc, val))
2589#endif
c2fd40cb 2590 tot--;
a687059c 2591 }
8165faea 2592 PERL_ASYNC_CHECK();
a687059c 2593 break;
b1248f16 2594#endif
79072805 2595 case OP_UNLINK:
20408e3c 2596 APPLY_TAINT_PROPER();
79072805
LW		 2597 tot = sp - mark;
2598 while (++mark <= sp) {
41188aa0 2599 s = SvPV_const(*mark, len);
20408e3c 2600 APPLY_TAINT_PROPER();
41188aa0 2601 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
c8028aa6
TC		 2602 tot--;
2603 }
f0d85c30 2604 else if (PL_unsafe) {
b8ffc8df 2605 if (UNLINK(s))
5cdd1fc2 2606 {
a687059c 2607 tot--;
5cdd1fc2
AB		 2608 }
2609#if defined(__amigaos4__) && defined(NEWLIB)
2610 else
2611 {
2612 /* Under AmigaOS4 unlink only 'fails' if the
2613 * filename is invalid. It may not remove the file
2614 * if it's locked, so check if it's still around. */
2615 if ((access(s,F_OK) != -1))
2616 {
2617 tot--;
2618 }
2619 }
2620#endif
a687059c
LW		 2621 }
2622 else { /* don't let root wipe out directories without -U */
45a23732
DD		 2623 Stat_t statbuf;
2624 if (PerlLIO_lstat(s, &statbuf) < 0)
1dcae8b8 2625 tot--;
45a23732 2626 else if (S_ISDIR(statbuf.st_mode)) {
cd52bc19 2627 SETERRNO(EISDIR, SS_NOPRIV);
45a23732 2628 tot--;
1dcae8b8 2629 }
a687059c 2630 else {
b8ffc8df 2631 if (UNLINK(s))
5cdd1fc2
AB		 2632 {
2633 tot--;
2634 }
2635#if defined(__amigaos4__) && defined(NEWLIB)
2636 else
2637 {
2638 /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
2639 /* It may not remove the file if it's Locked, so check if it's still */
2640 /* arround */
2641 if((access(s,F_OK) != -1))
2642 {
2643 tot--;
2644 }
2645 }
2646#endif
a687059c
LW		 2647 }
2648 }
2649 }
2650 break;
e96b369d 2651#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 2652 case OP_UTIME:
20408e3c 2653 APPLY_TAINT_PROPER();
79072805 2654 if (sp - mark > 2) {
e96b369d
GA		 2655#if defined(HAS_FUTIMES)
2656 struct timeval utbuf[2];
2657 void *utbufp = utbuf;
2658#elif defined(I_UTIME) || defined(VMS)
663a0e37 2659 struct utimbuf utbuf;
07409e01 2660 struct utimbuf *utbufp = &utbuf;
663a0e37 2661#else
a687059c 2662 struct {
dd2821f6
GS		 2663 Time_t actime;
2664 Time_t modtime;
a687059c 2665 } utbuf;
07409e01 2666 void *utbufp = &utbuf;
663a0e37 2667#endif
a687059c 2668
0bcc34c2
AL		 2669 SV* const accessed = *++mark;
2670 SV* const modified = *++mark;
c6f7b413 2671
6ec06612
SB		 2672 /* Be like C, and if both times are undefined, let the C
2673 * library figure out what to do. This usually means
2674 * "current time". */
c6f7b413
RS		 2675
2676 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB		 2677 utbufp = NULL;
2678 else {
2679 Zero(&utbuf, sizeof utbuf, char);
e96b369d 2680#ifdef HAS_FUTIMES
4ea561bc 2681 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 2682 utbuf[0].tv_usec = 0;
4ea561bc 2683 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA		 2684 utbuf[1].tv_usec = 0;
2685#elif defined(BIG_TIME)
4ea561bc
NC		 2686 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
2687 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 2688#else
4ea561bc
NC		 2689 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
2690 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 2691#endif
6ec06612 2692 }
4373e329 2693 APPLY_TAINT_PROPER();
79072805
LW		 2694 tot = sp - mark;
2695 while (++mark <= sp) {
e96b369d 2696 GV* gv;
64617da9 2697 if ((gv = MAYBE_DEREF_GV(*mark))) {
e96b369d
GA		 2698 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2699#ifdef HAS_FUTIMES
375ed12a 2700 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
e96b369d 2701 APPLY_TAINT_PROPER();
375ed12a
JH		 2702 if (fd < 0) {
2703 SETERRNO(EBADF,RMS_IFI);
2704 tot--;
2705 } else if (futimes(fd, (struct timeval *) utbufp))
e96b369d
GA		 2706 tot--;
2707#else
2708 Perl_die(aTHX_ PL_no_func, "futimes");
2709#endif
2710 }
2711 else {
2712 tot--;
2713 }
2714 }
e96b369d 2715 else {
41188aa0 2716 const char * const name = SvPV_nomg_const(*mark, len);
e96b369d 2717 APPLY_TAINT_PROPER();
41188aa0 2718 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
c8028aa6
TC		 2719 tot--;
2720 }
2721 else
e96b369d 2722#ifdef HAS_FUTIMES
8b7231d9 2723 if (utimes(name, (struct timeval *)utbufp))
e96b369d
GA		 2724#else
2725 if (PerlLIO_utime(name, utbufp))
2726#endif
2727 tot--;
2728 }
2729
a687059c 2730 }
a687059c
LW		 2731 }
2732 else
79072805 2733 tot = 0;
a687059c 2734 break;
a0d0e21e 2735#endif
a687059c
LW		 2736 }
2737 return tot;
20408e3c 2738
20408e3c 2739#undef APPLY_TAINT_PROPER
a687059c
LW		 2740}
2741
bd93adf5 2742/* Do the permissions in *statbufp allow some operation? */
a0d0e21e 2743#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 2744bool
5aaab254 2745Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
ae1951c1
NC		 2746/* effective is a flag, true for EUID, or for checking if the effective gid
2747 * is in the list of groups returned from getgroups().
2748 */
a687059c 2749{
7918f24d 2750 PERL_ARGS_ASSERT_CANDO;
81611534 2751 PERL_UNUSED_CONTEXT;
7918f24d 2752
bee1dbe2 2753#ifdef DOSISH
fe14fcc3
LW		 2754 /* [Comments and code from Len Reed]
2755 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2756 * to write-protected files. The execute permission bit is set
486ec47a 2757 * by the Microsoft C library stat() function for the following:
fe14fcc3
LW		 2758 * .exe files
2759 * .com files
2760 * .bat files
2761 * directories
2762 * All files and directories are readable.
2763 * Directories and special files, e.g. "CON", cannot be
2764 * write-protected.
2765 * [Comment by Tom Dinger -- a directory can have the write-protect
2766 * bit set in the file system, but DOS permits changes to
2767 * the directory anyway. In addition, all bets are off
2768 * here for networked software, such as Novell and
2769 * Sun's PC-NFS.]
2770 */
2771
bee1dbe2
LW		 2772 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2773 * too so it will actually look into the files for magic numbers
2774 */
8298454c 2775 return cBOOL(mode & statbufp->st_mode);
fe14fcc3 2776
55497cff 2777#else /* ! DOSISH */
b595cd4b
RU		 2778# ifdef __CYGWIN__
2779 if (ingroup(544,effective)) { /* member of Administrators */
2780# else
985213f2 2781 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
b595cd4b 2782# endif
7f4774ae 2783 if (mode == S_IXUSR) {
c623bd54 2784 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW		 2785 return TRUE;
2786 }
2787 else
2788 return TRUE; /* root reads and writes anything */
2789 return FALSE;
2790 }
985213f2 2791 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
7f4774ae 2792 if (statbufp->st_mode & mode)
a687059c
LW		 2793 return TRUE; /* ok as "user" */
2794 }
d8eceb89 2795 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 2796 if (statbufp->st_mode & mode >> 3)
a687059c
LW		 2797 return TRUE; /* ok as "group" */
2798 }
7f4774ae 2799 else if (statbufp->st_mode & mode >> 6)
a687059c
LW		 2800 return TRUE; /* ok as "other" */
2801 return FALSE;
55497cff 2802#endif /* ! DOSISH */
a687059c 2803}
a0d0e21e 2804#endif /* ! VMS */
a687059c 2805
1f676739 2806static bool
0da8eb3a 2807S_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 2808{
81611534
JH		 2809#ifndef PERL_IMPLICIT_SYS
2810 /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */
2811 PERL_UNUSED_CONTEXT;
2812#endif
985213f2 2813 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
a687059c 2814 return TRUE;
fe14fcc3 2815#ifdef HAS_GETGROUPS
a687059c 2816 {
331b57bc 2817 Groups_t *gary = NULL;
79072805 2818 I32 anum;
331b57bc 2819 bool rc = FALSE;
a687059c 2820
331b57bc 2821 anum = getgroups(0, gary);
375ed12a
JH		 2822 if (anum > 0) {
2823 Newx(gary, anum, Groups_t);
2824 anum = getgroups(anum, gary);
2825 while (--anum >= 0)
2826 if (gary[anum] == testgid) {
2827 rc = TRUE;
2828 break;
2829 }
331b57bc 2830
375ed12a
JH		 2831 Safefree(gary);
2832 }
331b57bc 2833 return rc;
a687059c 2834 }
c685562b 2835#else
a687059c 2836 return FALSE;
cd39f2b6 2837#endif
a687059c 2838}
c2ab57d4 2839
fe14fcc3 2840#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 2841
79072805 2842I32
864dbfa3 2843Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2844{
0bcc34c2 2845 const key_t key = (key_t)SvNVx(*++mark);
c3312966 2846 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
6867be6d 2847 const I32 flags = SvIVx(*++mark);
294a48e9 2848
7918f24d 2849 PERL_ARGS_ASSERT_DO_IPCGET;
294a48e9 2850 PERL_UNUSED_ARG(sp);
c2ab57d4 2851
748a9306 2852 SETERRNO(0,0);
c2ab57d4
LW		 2853 switch (optype)
2854 {
fe14fcc3 2855#ifdef HAS_MSG
79072805 2856 case OP_MSGGET:
c2ab57d4 2857 return msgget(key, flags);
e5d73d77 2858#endif
fe14fcc3 2859#ifdef HAS_SEM
79072805 2860 case OP_SEMGET:
c3312966 2861 return semget(key, (int) SvIV(nsv), flags);
e5d73d77 2862#endif
fe14fcc3 2863#ifdef HAS_SHM
79072805 2864 case OP_SHMGET:
c3312966 2865 return shmget(key, (size_t) SvUV(nsv), flags);
e5d73d77 2866#endif
fe14fcc3 2867#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2868 default:
fe13d51d 2869 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2870 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2871#endif
c2ab57d4
LW		 2872 }
2873 return -1; /* should never happen */
2874}
2875
79072805 2876I32
864dbfa3 2877Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2878{
c2ab57d4 2879 char *a;
a0d0e21e 2880 I32 ret = -1;
6867be6d 2881 const I32 id = SvIVx(*++mark);
95b63a38 2882#ifdef Semctl
6867be6d 2883 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2884#endif
6867be6d 2885 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL		 2886 SV * const astr = *++mark;
2887 STRLEN infosize = 0;
2888 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2889
7918f24d 2890 PERL_ARGS_ASSERT_DO_IPCCTL;
0bcc34c2 2891 PERL_UNUSED_ARG(sp);
c2ab57d4
LW		 2892
2893 switch (optype)
2894 {
fe14fcc3 2895#ifdef HAS_MSG
79072805 2896 case OP_MSGCTL:
c2ab57d4
LW		 2897 if (cmd == IPC_STAT || cmd == IPC_SET)
2898 infosize = sizeof(struct msqid_ds);
2899 break;
e5d73d77 2900#endif
fe14fcc3 2901#ifdef HAS_SHM
79072805 2902 case OP_SHMCTL:
c2ab57d4
LW		 2903 if (cmd == IPC_STAT || cmd == IPC_SET)
2904 infosize = sizeof(struct shmid_ds);
2905 break;
e5d73d77 2906#endif
fe14fcc3 2907#ifdef HAS_SEM
79072805 2908 case OP_SEMCTL:
39398f3f 2909#ifdef Semctl
c2ab57d4
LW		 2910 if (cmd == IPC_STAT || cmd == IPC_SET)
2911 infosize = sizeof(struct semid_ds);
2912 else if (cmd == GETALL || cmd == SETALL)
2913 {
8e591e46 2914 struct semid_ds semds;
bd89102f 2915 union semun semun;
e6f0bdd6
GS		 2916#ifdef EXTRA_F_IN_SEMUN_BUF
2917 semun.buff = &semds;
2918#else
84902520 2919 semun.buf = &semds;
e6f0bdd6 2920#endif
c2ab57d4 2921 getinfo = (cmd == GETALL);
9b89d93d
GB		 2922 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2923 return -1;
6e21c824
LW		 2924 infosize = semds.sem_nsems * sizeof(short);
2925 /* "short" is technically wrong but much more portable
2926 than guessing about u_?short(_t)? */
c2ab57d4 2927 }
39398f3f 2928#else
fe13d51d 2929 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2930 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2931#endif
c2ab57d4 2932 break;
e5d73d77 2933#endif
fe14fcc3 2934#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2935 default:
fe13d51d 2936 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2937 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2938#endif
c2ab57d4
LW		 2939 }
2940
2941 if (infosize)
2942 {
2943 if (getinfo)
2944 {
93524f2b 2945 SvPV_force_nolen(astr);
a0d0e21e 2946 a = SvGROW(astr, infosize+1);
c2ab57d4
LW		 2947 }
2948 else
2949 {
93524f2b 2950 STRLEN len;
463ee0b2
LW		 2951 a = SvPV(astr, len);
2952 if (len != infosize)
cea2e8a9 2953 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH		 2954 PL_op_desc[optype],
2955 (unsigned long)len,
2956 (long)infosize);
c2ab57d4
LW		 2957 }
2958 }
2959 else
2960 {
0bcc34c2 2961 const IV i = SvIV(astr);
56431972 2962 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2963 }
748a9306 2964 SETERRNO(0,0);
c2ab57d4
LW		 2965 switch (optype)
2966 {
fe14fcc3 2967#ifdef HAS_MSG
79072805 2968 case OP_MSGCTL:
bee1dbe2 2969 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2970 break;
e5d73d77 2971#endif
fe14fcc3 2972#ifdef HAS_SEM
bd89102f 2973 case OP_SEMCTL: {
39398f3f 2974#ifdef Semctl
bd89102f
AD		 2975 union semun unsemds;
2976
64d76282
BC		 2977 if(cmd == SETVAL) {
2978 unsemds.val = PTR2nat(a);
2979 }
2980 else {
e6f0bdd6 2981#ifdef EXTRA_F_IN_SEMUN_BUF
64d76282 2982 unsemds.buff = (struct semid_ds *)a;
e6f0bdd6 2983#else
64d76282 2984 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2985#endif
64d76282 2986 }
bd89102f 2987 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2988#else
fe13d51d 2989 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2990 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2991#endif
bd89102f 2992 }
c2ab57d4 2993 break;
e5d73d77 2994#endif
fe14fcc3 2995#ifdef HAS_SHM
79072805 2996 case OP_SHMCTL:
bee1dbe2 2997 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2998 break;
e5d73d77 2999#endif
c2ab57d4
LW		 3000 }
3001 if (getinfo && ret >= 0) {
79072805
LW		 3002 SvCUR_set(astr, infosize);
3003 *SvEND(astr) = '\0';
a0d0e21e 3004 SvSETMAGIC(astr);
c2ab57d4
LW		 3005 }
3006 return ret;
3007}
3008
79072805 3009I32
864dbfa3 3010Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 3011{
fe14fcc3 3012#ifdef HAS_MSG
463ee0b2 3013 STRLEN len;
6867be6d 3014 const I32 id = SvIVx(*++mark);
0bcc34c2
AL		 3015 SV * const mstr = *++mark;
3016 const I32 flags = SvIVx(*++mark);
3017 const char * const mbuf = SvPV_const(mstr, len);
3018 const I32 msize = len - sizeof(long);
3019
7918f24d 3020 PERL_ARGS_ASSERT_DO_MSGSND;
890ce7af 3021 PERL_UNUSED_ARG(sp);
c2ab57d4 3022
0bcc34c2 3023 if (msize < 0)
cea2e8a9 3024 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 3025 SETERRNO(0,0);
681fb693
JH		 3026 if (id >= 0 && flags >= 0) {
3027 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
3028 } else {
3029 SETERRNO(EINVAL,LIB_INVARG);
3030 return -1;
3031 }
e5d73d77 3032#else
2d51fa4d
RGS		 3033 PERL_UNUSED_ARG(sp);
3034 PERL_UNUSED_ARG(mark);
fe13d51d 3035 /* diag_listed_as: msg%s not implemented */
cea2e8a9 3036 Perl_croak(aTHX_ "msgsnd not implemented");
7c522378 3037 return -1;
e5d73d77 3038#endif
c2ab57d4
LW		 3039}
3040
79072805 3041I32
864dbfa3 3042Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 3043{
fe14fcc3 3044#ifdef HAS_MSG
c2ab57d4
LW		 3045 char *mbuf;
3046 long mtype;
6867be6d 3047 I32 msize, flags, ret;
6867be6d 3048 const I32 id = SvIVx(*++mark);
0bcc34c2 3049 SV * const mstr = *++mark;
7918f24d
NC		 3050
3051 PERL_ARGS_ASSERT_DO_MSGRCV;
890ce7af 3052 PERL_UNUSED_ARG(sp);
79072805 3053
c2e66d9e
GS		 3054 /* suppress warning when reading into undef var --jhi */
3055 if (! SvOK(mstr))
8062ff11 3056 SvPVCLEAR(mstr);
463ee0b2
LW		 3057 msize = SvIVx(*++mark);
3058 mtype = (long)SvIVx(*++mark);
3059 flags = SvIVx(*++mark);
93524f2b 3060 SvPV_force_nolen(mstr);
a0d0e21e 3061 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 3062
748a9306 3063 SETERRNO(0,0);
d2607e1e
JH		 3064 if (id >= 0 && msize >= 0 && flags >= 0) {
3065 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
3066 } else {
3067 SETERRNO(EINVAL,LIB_INVARG);
3068 ret = -1;
3069 }
c2ab57d4 3070 if (ret >= 0) {
79072805
LW		 3071 SvCUR_set(mstr, sizeof(long)+ret);
3072 *SvEND(mstr) = '\0';
41d6edb2
JH		 3073 /* who knows who has been playing with this message? */
3074 SvTAINTED_on(mstr);
c2ab57d4
LW		 3075 }
3076 return ret;
e5d73d77 3077#else
2d51fa4d
RGS		 3078 PERL_UNUSED_ARG(sp);
3079 PERL_UNUSED_ARG(mark);
fe13d51d 3080 /* diag_listed_as: msg%s not implemented */
cea2e8a9 3081 Perl_croak(aTHX_ "msgrcv not implemented");
7c522378 3082 return -1;
e5d73d77 3083#endif
c2ab57d4
LW		 3084}
3085
79072805 3086I32
864dbfa3 3087Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 3088{
fe14fcc3 3089#ifdef HAS_SEM
463ee0b2 3090 STRLEN opsize;
6867be6d 3091 const I32 id = SvIVx(*++mark);
0bcc34c2
AL		 3092 SV * const opstr = *++mark;
3093 const char * const opbuf = SvPV_const(opstr, opsize);
7918f24d
NC		 3094
3095 PERL_ARGS_ASSERT_DO_SEMOP;
890ce7af 3096 PERL_UNUSED_ARG(sp);
c2ab57d4 3097
248ff010
NC		 3098 if (opsize < 3 * SHORTSIZE
3099 || (opsize % (3 * SHORTSIZE))) {
93189314 3100 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW		 3101 return -1;
3102 }
748a9306 3103 SETERRNO(0,0);
248ff010
NC		 3104 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
3105 {
6867be6d 3106 const int nsops = opsize / (3 * sizeof (short));
248ff010 3107 int i = nsops;
0bcc34c2 3108 short * const ops = (short *) opbuf;
248ff010
NC		 3109 short *o = ops;
3110 struct sembuf *temps, *t;
3111 I32 result;
3112
a02a5408 3113 Newx (temps, nsops, struct sembuf);
248ff010
NC		 3114 t = temps;
3115 while (i--) {
3116 t->sem_num = *o++;
3117 t->sem_op = *o++;
3118 t->sem_flg = *o++;
3119 t++;
3120 }
3121 result = semop(id, temps, nsops);
248ff010
NC		 3122 Safefree(temps);
3123 return result;
3124 }
e5d73d77 3125#else
fe13d51d 3126 /* diag_listed_as: sem%s not implemented */
cea2e8a9 3127 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 3128#endif
c2ab57d4
LW		 3129}
3130
79072805 3131I32
864dbfa3 3132Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 3133{
fe14fcc3 3134#ifdef HAS_SHM
4373e329 3135 char *shm;
c2ab57d4 3136 struct shmid_ds shmds;
6867be6d 3137 const I32 id = SvIVx(*++mark);
0bcc34c2
AL		 3138 SV * const mstr = *++mark;
3139 const I32 mpos = SvIVx(*++mark);
3140 const I32 msize = SvIVx(*++mark);
7918f24d
NC		 3141
3142 PERL_ARGS_ASSERT_DO_SHMIO;
890ce7af 3143 PERL_UNUSED_ARG(sp);
c2ab57d4 3144
748a9306 3145 SETERRNO(0,0);
c2ab57d4
LW		 3146 if (shmctl(id, IPC_STAT, &shmds) == -1)
3147 return -1;
7f39519f
NC		 3148 if (mpos < 0 || msize < 0
3149 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
93189314 3150 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW		 3151 return -1;
3152 }
568fc267
JH		 3153 if (id >= 0) {
3154 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
3155 } else {
3156 SETERRNO(EINVAL,LIB_INVARG);
3157 return -1;
3158 }
c2ab57d4
LW		 3159 if (shm == (char *)-1) /* I hate System V IPC, I really do */
3160 return -1;
79072805 3161 if (optype == OP_SHMREAD) {
c8ae91a8 3162 char *mbuf;
9f538c04 3163 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
b399897d
CS		 3164 SvGETMAGIC(mstr);
3165 SvUPGRADE(mstr, SVt_PV);
9f538c04 3166 if (! SvOK(mstr))
8062ff11 3167 SvPVCLEAR(mstr);
af8ff727 3168 SvPOK_only(mstr);
bb7a0f54 3169 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 3170
bee1dbe2 3171 Copy(shm + mpos, mbuf, msize, char);
79072805
LW		 3172 SvCUR_set(mstr, msize);
3173 *SvEND(mstr) = '\0';
a0d0e21e 3174 SvSETMAGIC(mstr);
d929ce6f
JH		 3175 /* who knows who has been playing with this shared memory? */
3176 SvTAINTED_on(mstr);
c2ab57d4
LW		 3177 }
3178 else {
93524f2b 3179 STRLEN len;
c2ab57d4 3180
93524f2b 3181 const char *mbuf = SvPV_const(mstr, len);
027aa12d 3182 const I32 n = ((I32)len > msize) ? msize : (I32)len;
bee1dbe2 3183 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 3184 if (n < msize)
bee1dbe2 3185 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW		 3186 }
3187 return shmdt(shm);
e5d73d77 3188#else
fe13d51d 3189 /* diag_listed_as: shm%s not implemented */
cea2e8a9 3190 Perl_croak(aTHX_ "shm I/O not implemented");
7c522378 3191 return -1;
e5d73d77 3192#endif
c2ab57d4
LW		 3193}
3194
fe14fcc3 3195#endif /* SYSV IPC */
4e35701f 3196
0d44d22b 3197/*
ccfc67b7
JH		 3198=head1 IO Functions
3199
0d44d22b
NC		 3200=for apidoc start_glob
3201
3202Function called by C<do_readline> to spawn a glob (or do the glob inside
154e47c8 3203perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
25047fde
KW		 3204this glob starter is only used by miniperl during the build process,
3205or when PERL_EXTERNAL_GLOB is defined.
75af9d73 3206Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up.
fab3f3a7 3207
0d44d22b
NC		 3208=cut
3209*/
3210
3211PerlIO *
3212Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
3213{
561b68a9 3214 SV * const tmpcmd = newSV(0);
0d44d22b 3215 PerlIO *fp;
41188aa0
TC		 3216 STRLEN len;
3217 const char *s = SvPV(tmpglob, len);
7918f24d
NC		 3218
3219 PERL_ARGS_ASSERT_START_GLOB;
3220
41188aa0 3221 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
c8028aa6
TC		 3222 return NULL;
3223
0d44d22b
NC		 3224 ENTER;
3225 SAVEFREESV(tmpcmd);
3226#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
3227 /* since spawning off a process is a real performance hit */
dca5a913 3228
1cc9774b
CB		 3229PerlIO *
3230Perl_vms_start_glob
3231 (pTHX_ SV *tmpglob,
3232 IO *io);
3233
49a7a762 3234 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 3235
0d44d22b 3236#else /* !VMS */
4009c3ff
AC		 3237# ifdef DOSISH
3238# if defined(OS2)
0d44d22b
NC		 3239 sv_setpv(tmpcmd, "for a in ");
3240 sv_catsv(tmpcmd, tmpglob);
3241 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
4009c3ff 3242# elif defined(DJGPP)
0d44d22b
NC		 3243 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
3244 sv_catsv(tmpcmd, tmpglob);
4009c3ff 3245# else
0d44d22b
NC		 3246 sv_setpv(tmpcmd, "perlglob ");
3247 sv_catsv(tmpcmd, tmpglob);
3248 sv_catpv(tmpcmd, " |");
4009c3ff
AC		 3249# endif
3250# elif defined(CSH)
0d44d22b
NC		 3251 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
3252 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
3253 sv_catsv(tmpcmd, tmpglob);
3254 sv_catpv(tmpcmd, "' 2>/dev/null |");
4009c3ff 3255# else
0d44d22b
NC		 3256 sv_setpv(tmpcmd, "echo ");
3257 sv_catsv(tmpcmd, tmpglob);
0d44d22b 3258 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
4009c3ff 3259# endif /* !DOSISH && !CSH */
93b2dae1 3260 {
acffc8af
FC		 3261 SV ** const svp = hv_fetchs(GvHVn(PL_envgv), "LS_COLORS", 0);
3262 if (svp && *svp)
3263 save_helem_flags(GvHV(PL_envgv),
3264 newSVpvs_flags("LS_COLORS", SVs_TEMP), svp,
3265 SAVEf_SETMAGIC);
93b2dae1 3266 }
d5eb9a46
NC		 3267 (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
3268 NULL, NULL, 0);
0d44d22b
NC		 3269 fp = IoIFP(io);
3270#endif /* !VMS */
3271 LEAVE;
de7dabb6
TC		 3272
3273 if (!fp && ckWARN(WARN_GLOB)) {
3274 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
3275 Strerror(errno));
3276 }
3277
0d44d22b
NC		 3278 return fp;
3279}
66610fdd
RGS		 3280
3281/*
14d04a33 3282 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3283 */
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