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[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
a687059c 4 *
6e21c824
LW
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
a0d0e21e
LW
8 */
9
10/*
11 * "Far below them they saw the white waters pour into a foaming bowl, and
12 * then swirl darkly about a deep oval basin in the rocks, until they found
13 * their way out again through a narrow gate, and flowed away, fuming and
14 * chattering, into calmer and more level reaches."
a687059c
LW
15 */
16
17#include "EXTERN.h"
864dbfa3 18#define PERL_IN_DOIO_C
a687059c
LW
19#include "perl.h"
20
fe14fcc3 21#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 22#ifndef HAS_SEM
c2ab57d4 23#include <sys/ipc.h>
aec308ec 24#endif
fe14fcc3 25#ifdef HAS_MSG
c2ab57d4 26#include <sys/msg.h>
e5d73d77 27#endif
fe14fcc3 28#ifdef HAS_SHM
c2ab57d4 29#include <sys/shm.h>
a0d0e21e 30# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 31 extern Shmat_t shmat (int, char *, int);
a0d0e21e 32# endif
c2ab57d4 33#endif
e5d73d77 34#endif
c2ab57d4 35
663a0e37 36#ifdef I_UTIME
3730b96e 37# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
PP
38# include <sys/utime.h>
39# else
40# include <utime.h>
41# endif
663a0e37 42#endif
85aff577 43
85aff577
CS
44#ifdef O_EXCL
45# define OPEN_EXCL O_EXCL
46#else
47# define OPEN_EXCL 0
48#endif
a687059c 49
76121258
PP
50#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
51#include <signal.h>
52#endif
53
a687059c 54bool
6170680b
IZ
55Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
56 int rawmode, int rawperm, PerlIO *supplied_fp)
57{
58 return do_open9(gv, name, len, as_raw, rawmode, rawperm,
59 supplied_fp, Nullsv, 0);
60}
61
62bool
63Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
64 int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
65 I32 num_svs)
a687059c 66{
a0d0e21e 67 register IO *io = GvIOn(gv);
760ac839
LW
68 PerlIO *saveifp = Nullfp;
69 PerlIO *saveofp = Nullfp;
9f37169a 70 char savetype = IoTYPE_CLOSED;
c07a80fd 71 int writing = 0;
760ac839 72 PerlIO *fp;
c07a80fd
PP
73 int fd;
74 int result;
3500f679 75 bool was_fdopen = FALSE;
16fe6d59 76 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
b931b1d9
NIS
77 char *type = NULL;
78 char *deftype = NULL;
79 char mode[4]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
a687059c 80
b931b1d9 81 Zero(mode,sizeof(mode),char);
3280af22 82 PL_forkprocess = 1; /* assume true if no fork */
c07a80fd 83
b931b1d9 84 /* Collect default raw/crlf info from the op */
16fe6d59
GS
85 if (PL_op && PL_op->op_type == OP_OPEN) {
86 /* set up disciplines */
87 U8 flags = PL_op->op_private;
88 in_raw = (flags & OPpOPEN_IN_RAW);
89 in_crlf = (flags & OPpOPEN_IN_CRLF);
90 out_raw = (flags & OPpOPEN_OUT_RAW);
91 out_crlf = (flags & OPpOPEN_OUT_CRLF);
92 }
93
b931b1d9 94 /* If currently open - close before we re-open */
a0d0e21e 95 if (IoIFP(io)) {
760ac839 96 fd = PerlIO_fileno(IoIFP(io));
50952442 97 if (IoTYPE(io) == IoTYPE_STD)
c2ab57d4 98 result = 0;
3280af22 99 else if (fd <= PL_maxsysfd) {
8990e307
LW
100 saveifp = IoIFP(io);
101 saveofp = IoOFP(io);
102 savetype = IoTYPE(io);
6e21c824
LW
103 result = 0;
104 }
50952442 105 else if (IoTYPE(io) == IoTYPE_PIPE)
3028581b 106 result = PerlProc_pclose(IoIFP(io));
8990e307
LW
107 else if (IoIFP(io) != IoOFP(io)) {
108 if (IoOFP(io)) {
760ac839 109 result = PerlIO_close(IoOFP(io));
6170680b 110 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
111 }
112 else
760ac839 113 result = PerlIO_close(IoIFP(io));
a687059c 114 }
a687059c 115 else
760ac839 116 result = PerlIO_close(IoIFP(io));
3280af22 117 if (result == EOF && fd > PL_maxsysfd)
bf49b057 118 PerlIO_printf(Perl_error_log,
6170680b
IZ
119 "Warning: unable to close filehandle %s properly.\n",
120 GvENAME(gv));
8990e307 121 IoOFP(io) = IoIFP(io) = Nullfp;
a687059c 122 }
c07a80fd
PP
123
124 if (as_raw) {
b931b1d9
NIS
125 /* sysopen style args, i.e. integer mode and permissions */
126
09458382 127#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
5ff3f7a4
GS
128 rawmode |= O_LARGEFILE;
129#endif
130
9d116dd7
JH
131#ifndef O_ACCMODE
132#define O_ACCMODE 3 /* Assume traditional implementation */
133#endif
5ff3f7a4 134
9d116dd7
JH
135 switch (result = rawmode & O_ACCMODE) {
136 case O_RDONLY:
50952442 137 IoTYPE(io) = IoTYPE_RDONLY;
9d116dd7
JH
138 break;
139 case O_WRONLY:
50952442 140 IoTYPE(io) = IoTYPE_WRONLY;
9d116dd7
JH
141 break;
142 case O_RDWR:
143 default:
50952442 144 IoTYPE(io) = IoTYPE_RDWR;
9d116dd7
JH
145 break;
146 }
147
c07a80fd 148 writing = (result > 0);
3028581b 149 fd = PerlLIO_open3(name, rawmode, rawperm);
9d116dd7 150
c07a80fd
PP
151 if (fd == -1)
152 fp = NULL;
153 else {
16fe6d59 154 STRLEN ix = 0;
b931b1d9
NIS
155 if (result == O_RDONLY) {
156 mode[ix++] = 'r';
157 }
360e5741 158#ifdef O_APPEND
16fe6d59 159 else if (rawmode & O_APPEND) {
b931b1d9 160 mode[ix++] = 'a';
16fe6d59 161 if (result != O_WRONLY)
b931b1d9 162 mode[ix++] = '+';
16fe6d59 163 }
360e5741 164#endif
16fe6d59
GS
165 else {
166 if (result == O_WRONLY)
b931b1d9 167 mode[ix++] = 'w';
16fe6d59 168 else {
b931b1d9
NIS
169 mode[ix++] = 'r';
170 mode[ix++] = '+';
16fe6d59
GS
171 }
172 }
173 if (rawmode & O_BINARY)
b931b1d9
NIS
174 mode[ix++] = 'b';
175 mode[ix] = '\0';
176 fp = PerlIO_fdopen(fd, mode);
c07a80fd 177 if (!fp)
3028581b 178 PerlLIO_close(fd);
c07a80fd 179 }
a687059c 180 }
c07a80fd 181 else {
b931b1d9 182 /* Regular (non-sys) open */
faecd977 183 char *oname = name;
faecd977 184 STRLEN olen = len;
b931b1d9
NIS
185 char *tend;
186 int dodup = 0;
c07a80fd 187
faecd977 188 type = savepvn(name, len);
b931b1d9 189 tend = type+len;
faecd977 190 SAVEFREEPV(type);
b931b1d9
NIS
191 /* Loose trailing white space */
192 while (tend > type && isSPACE(tend[-1]))
193 *tend-- = '\0';
6170680b 194 if (num_svs) {
b931b1d9 195 /* New style explict name, type is just mode and discipline/layer info */
faecd977
GS
196 STRLEN l;
197 name = SvPV(svs, l) ;
198 len = (I32)l;
199 name = savepvn(name, len);
200 SAVEFREEPV(name);
b931b1d9
NIS
201 /*SUPPRESS 530*/
202 for (; isSPACE(*type); type++) ;
6170680b 203 }
faecd977 204 else {
faecd977 205 name = type;
b931b1d9 206 len = tend-type;
faecd977 207 }
6170680b 208 IoTYPE(io) = *type;
b931b1d9 209 if (*type == IoTYPE_RDWR && (!num_svs || tend > type+1 && tend[-1] != IoTYPE_PIPE)) { /* scary */
6170680b 210 mode[1] = *type++;
c07a80fd 211 writing = 1;
a687059c 212 }
c07a80fd 213
9f37169a 214 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS
215 if (num_svs) {
216 if (type[1] != IoTYPE_STD) {
217 unknown_desr:
218 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
219 }
220 type++;
6170680b 221 }
c07a80fd 222 /*SUPPRESS 530*/
b931b1d9 223 for (type++; isSPACE(*type); type++) ;
faecd977 224 if (!num_svs) {
6170680b 225 name = type;
b931b1d9 226 len = tend-type;
faecd977 227 }
06eaf0bc 228 if (*name == '\0') { /* command is missing 19990114 */
06eaf0bc 229 if (ckWARN(WARN_PIPE))
cea2e8a9 230 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
06eaf0bc
GS
231 errno = EPIPE;
232 goto say_false;
233 }
6170680b 234 if (strNE(name,"-") || num_svs)
c07a80fd
PP
235 TAINT_ENV();
236 TAINT_PROPER("piped open");
b931b1d9 237 if (!num_svs && name[len-1] == '|') {
faecd977 238 name[--len] = '\0' ;
599cee73 239 if (ckWARN(WARN_PIPE))
9a7dcd9c 240 Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe");
7b8d334a 241 }
a1d180c4 242 mode[0] = 'w';
c07a80fd 243 writing = 1;
a1d180c4
NIS
244 if (out_raw)
245 strcat(mode, "b");
246 else if (out_crlf)
247 strcat(mode, "t");
248 fp = PerlProc_popen(name,mode);
c07a80fd 249 }
9f37169a 250 else if (*type == IoTYPE_WRONLY) {
c07a80fd 251 TAINT_PROPER("open");
6170680b 252 type++;
9f37169a
JH
253 if (*type == IoTYPE_WRONLY) {
254 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 255 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 256 type++;
a0d0e21e 257 }
c07a80fd
PP
258 else
259 mode[0] = 'w';
260 writing = 1;
261
16fe6d59
GS
262 if (out_raw)
263 strcat(mode, "b");
264 else if (out_crlf)
265 strcat(mode, "t");
266
6170680b
IZ
267 if (*type == '&') {
268 name = type;
c07a80fd 269 duplicity:
b931b1d9
NIS
270 if (num_svs)
271 goto unknown_desr;
c07a80fd
PP
272 dodup = 1;
273 name++;
274 if (*name == '=') {
275 dodup = 0;
a0d0e21e 276 name++;
c07a80fd
PP
277 }
278 if (!*name && supplied_fp)
279 fp = supplied_fp;
a0d0e21e 280 else {
c07a80fd
PP
281 /*SUPPRESS 530*/
282 for (; isSPACE(*name); name++) ;
283 if (isDIGIT(*name))
284 fd = atoi(name);
285 else {
286 IO* thatio;
287 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
288 thatio = GvIO(gv);
289 if (!thatio) {
6e21c824 290#ifdef EINVAL
c07a80fd 291 SETERRNO(EINVAL,SS$_IVCHAN);
6e21c824 292#endif
c07a80fd
PP
293 goto say_false;
294 }
295 if (IoIFP(thatio)) {
54195c32 296 PerlIO *fp = IoIFP(thatio);
7211d486
JH
297 /* Flush stdio buffer before dup. --mjd
298 * Unfortunately SEEK_CURing 0 seems to
299 * be optimized away on most platforms;
300 * only Solaris and Linux seem to flush
301 * on that. --jhi */
2c534a3f
NC
302#ifdef USE_SFIO
303 /* sfio fails to clear error on next
304 sfwrite, contrary to documentation.
305 -- Nick Clark */
306 if (PerlIO_seek(fp, 0, SEEK_CUR) == -1)
307 PerlIO_clearerr(fp);
308#endif
7211d486
JH
309 /* On the other hand, do all platforms
310 * take gracefully to flushing a read-only
311 * filehandle? Perhaps we should do
312 * fsetpos(src)+fgetpos(dst)? --nik */
313 PerlIO_flush(fp);
54195c32 314 fd = PerlIO_fileno(fp);
0759c907
JH
315 /* When dup()ing STDIN, STDOUT or STDERR
316 * explicitly set appropriate access mode */
317 if (IoIFP(thatio) == PerlIO_stdout()
318 || IoIFP(thatio) == PerlIO_stderr())
319 IoTYPE(io) = IoTYPE_WRONLY;
320 else if (IoIFP(thatio) == PerlIO_stdin())
321 IoTYPE(io) = IoTYPE_RDONLY;
322 /* When dup()ing a socket, say result is
323 * one as well */
324 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 325 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
326 }
327 else
328 fd = -1;
a0d0e21e 329 }
fec02dd3 330 if (dodup)
3028581b 331 fd = PerlLIO_dup(fd);
3500f679
RS
332 else
333 was_fdopen = TRUE;
760ac839 334 if (!(fp = PerlIO_fdopen(fd,mode))) {
c07a80fd 335 if (dodup)
3028581b 336 PerlLIO_close(fd);
faecd977 337 }
c07a80fd 338 }
bf38876a 339 }
c07a80fd
PP
340 else {
341 /*SUPPRESS 530*/
6170680b 342 for (; isSPACE(*type); type++) ;
b931b1d9
NIS
343 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
344 /*SUPPRESS 530*/
345 type++;
760ac839 346 fp = PerlIO_stdout();
50952442 347 IoTYPE(io) = IoTYPE_STD;
c07a80fd
PP
348 }
349 else {
6170680b 350 fp = PerlIO_open((num_svs ? name : type), mode);
c07a80fd 351 }
bf38876a
LW
352 }
353 }
9f37169a 354 else if (*type == IoTYPE_RDONLY) {
c07a80fd 355 /*SUPPRESS 530*/
6170680b 356 for (type++; isSPACE(*type); type++) ;
bf38876a 357 mode[0] = 'r';
16fe6d59
GS
358 if (in_raw)
359 strcat(mode, "b");
360 else if (in_crlf)
361 strcat(mode, "t");
362
6170680b
IZ
363 if (*type == '&') {
364 name = type;
bf38876a 365 goto duplicity;
6170680b 366 }
b931b1d9
NIS
367 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
368 /*SUPPRESS 530*/
369 type++;
760ac839 370 fp = PerlIO_stdin();
50952442 371 IoTYPE(io) = IoTYPE_STD;
a687059c 372 }
bf38876a 373 else
6170680b 374 fp = PerlIO_open((num_svs ? name : type), mode);
a687059c 375 }
b931b1d9
NIS
376 else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
377 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 378 if (num_svs) {
b931b1d9 379 type += 2; /* skip over '-|' */
6170680b
IZ
380 }
381 else {
b931b1d9
NIS
382 *--tend = '\0';
383 while (tend > type && isSPACE(tend[-1]))
384 *--tend = '\0';
6170680b
IZ
385 /*SUPPRESS 530*/
386 for (; isSPACE(*type); type++) ;
387 name = type;
b931b1d9 388 len = tend-type;
6170680b 389 }
06eaf0bc 390 if (*name == '\0') { /* command is missing 19990114 */
06eaf0bc 391 if (ckWARN(WARN_PIPE))
cea2e8a9 392 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
06eaf0bc
GS
393 errno = EPIPE;
394 goto say_false;
395 }
6170680b 396 if (strNE(name,"-") || num_svs)
79072805
LW
397 TAINT_ENV();
398 TAINT_PROPER("piped open");
a1d180c4
NIS
399 mode[0] = 'r';
400 if (in_raw)
401 strcat(mode, "b");
402 else if (in_crlf)
403 strcat(mode, "t");
404 fp = PerlProc_popen(name,mode);
50952442 405 IoTYPE(io) = IoTYPE_PIPE;
a687059c
LW
406 }
407 else {
6170680b
IZ
408 if (num_svs)
409 goto unknown_desr;
410 name = type;
50952442 411 IoTYPE(io) = IoTYPE_RDONLY;
99b89507
LW
412 /*SUPPRESS 530*/
413 for (; isSPACE(*name); name++) ;
88b61e10
NIS
414 mode[0] = 'r';
415 if (in_raw)
416 strcat(mode, "b");
417 else if (in_crlf)
418 strcat(mode, "t");
a687059c 419 if (strEQ(name,"-")) {
760ac839 420 fp = PerlIO_stdin();
50952442 421 IoTYPE(io) = IoTYPE_STD;
a687059c 422 }
16fe6d59 423 else {
16fe6d59
GS
424 fp = PerlIO_open(name,mode);
425 }
a687059c
LW
426 }
427 }
bee1dbe2 428 if (!fp) {
50952442 429 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
cea2e8a9 430 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
6e21c824 431 goto say_false;
bee1dbe2 432 }
88b61e10 433 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD) {
3280af22 434 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
760ac839 435 (void)PerlIO_close(fp);
6e21c824 436 goto say_false;
a687059c 437 }
3280af22 438 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 439 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
440#ifdef HAS_SOCKET
441 else if (
c623bd54 442#ifdef S_IFMT
3280af22 443 !(PL_statbuf.st_mode & S_IFMT)
99b89507 444#else
b28d0864 445 !PL_statbuf.st_mode
99b89507 446#endif
0759c907
JH
447 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
448 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
449 ) { /* on OS's that return 0 on fstat()ed pipe */
96827780
MB
450 char tmpbuf[256];
451 Sock_size_t buflen = sizeof tmpbuf;
3028581b 452 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
d574b85e
CS
453 &buflen) >= 0
454 || errno != ENOTSOCK)
50952442 455 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
99b89507
LW
456 /* but some return 0 for streams too, sigh */
457 }
bf38876a 458#endif
a687059c 459 }
6e21c824 460 if (saveifp) { /* must use old fp? */
f5b9d040 461 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 462 then dup the new fileno down
f5b9d040 463 */
760ac839 464 fd = PerlIO_fileno(saveifp);
6e21c824 465 if (saveofp) {
f5b9d040 466 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 467 if (saveofp != saveifp) { /* was a socket? */
760ac839 468 PerlIO_close(saveofp);
24c23ab4 469 /* This looks very suspect - NI-S 24 Nov 2000 */
99b89507 470 if (fd > 2)
f5b9d040 471 Safefree(saveofp); /* ??? */
6e21c824
LW
472 }
473 }
760ac839 474 if (fd != PerlIO_fileno(fp)) {
d8a83dd3 475 Pid_t pid;
79072805 476 SV *sv;
bee1dbe2 477
3028581b 478 PerlLIO_dup2(PerlIO_fileno(fp), fd);
4755096e 479 LOCK_FDPID_MUTEX;
3280af22 480 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
a0d0e21e 481 (void)SvUPGRADE(sv, SVt_IV);
463ee0b2
LW
482 pid = SvIVX(sv);
483 SvIVX(sv) = 0;
3280af22 484 sv = *av_fetch(PL_fdpid,fd,TRUE);
4755096e 485 UNLOCK_FDPID_MUTEX;
a0d0e21e 486 (void)SvUPGRADE(sv, SVt_IV);
463ee0b2 487 SvIVX(sv) = pid;
3500f679
RS
488 if (!was_fdopen)
489 PerlIO_close(fp);
bee1dbe2 490
6e21c824
LW
491 }
492 fp = saveifp;
760ac839 493 PerlIO_clearerr(fp);
6e21c824 494 }
a0d0e21e 495#if defined(HAS_FCNTL) && defined(F_SETFD)
a8710ca1
GS
496 {
497 int save_errno = errno;
498 fd = PerlIO_fileno(fp);
499 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
500 errno = save_errno;
501 }
1462b684 502#endif
8990e307 503 IoIFP(io) = fp;
b931b1d9
NIS
504 if (!num_svs) {
505 /* Need to supply default type info from open.pm */
ac27b0f5 506 SV *layers = PL_curcop->cop_io;
b931b1d9 507 type = NULL;
ac27b0f5
NIS
508 if (layers) {
509 STRLEN len;
510 type = SvPV(layers,len);
511 if (type && mode[0] != 'r') {
512 /* Skip to write part */
513 char *s = strchr(type,0);
514 if (s && (s-type) < len) {
515 type = s+1;
516 }
517 }
518 }
b931b1d9
NIS
519 }
520 if (type) {
521 while (isSPACE(*type)) type++;
522 if (*type) {
ac27b0f5
NIS
523 if (PerlIO_apply_layers(aTHX_ IoIFP(io),mode,type) != 0) {
524 goto say_false;
525 }
b931b1d9
NIS
526 }
527 }
528
684bef36 529 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 530 if (writing) {
50952442
JH
531 if (IoTYPE(io) == IoTYPE_SOCKET
532 || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) )
16fe6d59 533 {
b931b1d9 534 mode[0] = 'w';
16fe6d59 535 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),mode))) {
760ac839 536 PerlIO_close(fp);
8990e307 537 IoIFP(io) = Nullfp;
6e21c824 538 goto say_false;
fe14fcc3 539 }
ac27b0f5
NIS
540 if (type && *type) {
541 if (PerlIO_apply_layers(aTHX_ IoOFP(io),mode,type) != 0) {
542 PerlIO_close(IoOFP(io));
543 PerlIO_close(fp);
544 IoIFP(io) = Nullfp;
545 IoOFP(io) = Nullfp;
546 goto say_false;
547 }
548 }
1462b684
LW
549 }
550 else
8990e307 551 IoOFP(io) = fp;
bf38876a 552 }
a687059c 553 return TRUE;
6e21c824
LW
554
555say_false:
8990e307
LW
556 IoIFP(io) = saveifp;
557 IoOFP(io) = saveofp;
558 IoTYPE(io) = savetype;
6e21c824 559 return FALSE;
a687059c
LW
560}
561
760ac839 562PerlIO *
864dbfa3 563Perl_nextargv(pTHX_ register GV *gv)
a687059c 564{
79072805 565 register SV *sv;
99b89507 566#ifndef FLEXFILENAMES
c623bd54
LW
567 int filedev;
568 int fileino;
99b89507 569#endif
761237fe
JB
570 Uid_t fileuid;
571 Gid_t filegid;
18708f5a 572 IO *io = GvIOp(gv);
fe14fcc3 573
3280af22
NIS
574 if (!PL_argvoutgv)
575 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
18708f5a
GS
576 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
577 IoFLAGS(io) &= ~IOf_START;
7a1c5554
GS
578 if (PL_inplace) {
579 if (!PL_argvout_stack)
580 PL_argvout_stack = newAV();
18708f5a 581 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
7a1c5554 582 }
18708f5a 583 }
3280af22
NIS
584 if (PL_filemode & (S_ISUID|S_ISGID)) {
585 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 586#ifdef HAS_FCHMOD
3280af22 587 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 588#else
b28d0864 589 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
590#endif
591 }
3280af22 592 PL_filemode = 0;
79072805 593 while (av_len(GvAV(gv)) >= 0) {
85aff577 594 STRLEN oldlen;
79072805 595 sv = av_shift(GvAV(gv));
8990e307 596 SAVEFREESV(sv);
79072805
LW
597 sv_setsv(GvSV(gv),sv);
598 SvSETMAGIC(GvSV(gv));
3280af22 599 PL_oldname = SvPVx(GvSV(gv), oldlen);
9d116dd7 600 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
3280af22 601 if (PL_inplace) {
79072805 602 TAINT_PROPER("inplace open");
3280af22 603 if (oldlen == 1 && *PL_oldname == '-') {
4633a7c4 604 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
a0d0e21e 605 return IoIFP(GvIOp(gv));
c623bd54 606 }
99b89507 607#ifndef FLEXFILENAMES
b28d0864
NIS
608 filedev = PL_statbuf.st_dev;
609 fileino = PL_statbuf.st_ino;
99b89507 610#endif
3280af22
NIS
611 PL_filemode = PL_statbuf.st_mode;
612 fileuid = PL_statbuf.st_uid;
613 filegid = PL_statbuf.st_gid;
614 if (!S_ISREG(PL_filemode)) {
0453d815
PM
615 if (ckWARN_d(WARN_INPLACE))
616 Perl_warner(aTHX_ WARN_INPLACE,
617 "Can't do inplace edit: %s is not a regular file",
618 PL_oldname );
79072805 619 do_close(gv,FALSE);
c623bd54
LW
620 continue;
621 }
3280af22
NIS
622 if (*PL_inplace) {
623 char *star = strchr(PL_inplace, '*');
2d259d92 624 if (star) {
3280af22 625 char *begin = PL_inplace;
2d259d92
CK
626 sv_setpvn(sv, "", 0);
627 do {
628 sv_catpvn(sv, begin, star - begin);
3280af22 629 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
630 begin = ++star;
631 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
632 if (*begin)
633 sv_catpv(sv,begin);
2d259d92
CK
634 }
635 else {
3280af22 636 sv_catpv(sv,PL_inplace);
2d259d92 637 }
c623bd54 638#ifndef FLEXFILENAMES
b28d0864
NIS
639 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
640 && PL_statbuf.st_dev == filedev
641 && PL_statbuf.st_ino == fileino
39e571d4
ML
642#ifdef DJGPP
643 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
644#endif
f248d071
GS
645 )
646 {
647 if (ckWARN_d(WARN_INPLACE))
648 Perl_warner(aTHX_ WARN_INPLACE,
649 "Can't do inplace edit: %s would not be unique",
650 SvPVX(sv));
79072805 651 do_close(gv,FALSE);
c623bd54
LW
652 continue;
653 }
654#endif
fe14fcc3 655#ifdef HAS_RENAME
d308986b 656#if !defined(DOSISH) && !defined(__CYGWIN__)
3280af22 657 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
0453d815 658 if (ckWARN_d(WARN_INPLACE))
a1d180c4 659 Perl_warner(aTHX_ WARN_INPLACE,
0453d815
PM
660 "Can't rename %s to %s: %s, skipping file",
661 PL_oldname, SvPVX(sv), Strerror(errno) );
79072805 662 do_close(gv,FALSE);
c623bd54
LW
663 continue;
664 }
a687059c 665#else
79072805 666 do_close(gv,FALSE);
3028581b 667 (void)PerlLIO_unlink(SvPVX(sv));
b28d0864 668 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
9d116dd7 669 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
55497cff 670#endif /* DOSISH */
ff8e2863 671#else
463ee0b2 672 (void)UNLINK(SvPVX(sv));
b28d0864 673 if (link(PL_oldname,SvPVX(sv)) < 0) {
0453d815
PM
674 if (ckWARN_d(WARN_INPLACE))
675 Perl_warner(aTHX_ WARN_INPLACE,
676 "Can't rename %s to %s: %s, skipping file",
677 PL_oldname, SvPVX(sv), Strerror(errno) );
79072805 678 do_close(gv,FALSE);
c623bd54
LW
679 continue;
680 }
b28d0864 681 (void)UNLINK(PL_oldname);
a687059c
LW
682#endif
683 }
684 else {
a8c18271 685#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 686# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 687 if (UNLINK(PL_oldname) < 0) {
0453d815
PM
688 if (ckWARN_d(WARN_INPLACE))
689 Perl_warner(aTHX_ WARN_INPLACE,
690 "Can't remove %s: %s, skipping file",
691 PL_oldname, Strerror(errno) );
79072805 692 do_close(gv,FALSE);
fe14fcc3
LW
693 continue;
694 }
edc7bc49 695# endif
ff8e2863 696#else
cea2e8a9 697 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 698#endif
a687059c
LW
699 }
700
3280af22
NIS
701 sv_setpvn(sv,">",!PL_inplace);
702 sv_catpvn(sv,PL_oldname,oldlen);
748a9306 703 SETERRNO(0,0); /* in case sprintf set errno */
4119ab01
HM
704#ifdef VMS
705 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
18708f5a 706 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
4119ab01 707#else
3280af22 708 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
18708f5a 709 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
4119ab01 710#endif
18708f5a 711 {
0453d815
PM
712 if (ckWARN_d(WARN_INPLACE))
713 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
714 PL_oldname, Strerror(errno) );
79072805 715 do_close(gv,FALSE);
fe14fcc3
LW
716 continue;
717 }
3280af22
NIS
718 setdefout(PL_argvoutgv);
719 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
720 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 721#ifdef HAS_FCHMOD
3280af22 722 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 723#else
3e3baf6d
TB
724# if !(defined(WIN32) && defined(__BORLANDC__))
725 /* Borland runtime creates a readonly file! */
b28d0864 726 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 727# endif
a687059c 728#endif
3280af22 729 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 730#ifdef HAS_FCHOWN
3280af22 731 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 732#else
fe14fcc3 733#ifdef HAS_CHOWN
b28d0864 734 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 735#endif
b1248f16 736#endif
fe14fcc3 737 }
a687059c 738 }
a0d0e21e 739 return IoIFP(GvIOp(gv));
a687059c 740 }
4d61ec05 741 else {
4d61ec05 742 if (ckWARN_d(WARN_INPLACE)) {
6af84f9f
GS
743 int eno = errno;
744 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
745 && !S_ISREG(PL_statbuf.st_mode))
746 {
4d61ec05
GS
747 Perl_warner(aTHX_ WARN_INPLACE,
748 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 749 PL_oldname);
6af84f9f 750 }
4d61ec05 751 else
9a7dcd9c 752 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
6af84f9f 753 PL_oldname, Strerror(eno));
4d61ec05
GS
754 }
755 }
a687059c 756 }
18708f5a
GS
757 if (io && (IoFLAGS(io) & IOf_ARGV))
758 IoFLAGS(io) |= IOf_START;
3280af22
NIS
759 if (PL_inplace) {
760 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
761 if (io && (IoFLAGS(io) & IOf_ARGV)
762 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
763 {
18708f5a
GS
764 GV *oldout = (GV*)av_pop(PL_argvout_stack);
765 setdefout(oldout);
766 SvREFCNT_dec(oldout);
767 return Nullfp;
768 }
4633a7c4 769 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
a687059c
LW
770 }
771 return Nullfp;
772}
773
fe14fcc3 774#ifdef HAS_PIPE
afd9f252 775void
864dbfa3 776Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
afd9f252 777{
79072805
LW
778 register IO *rstio;
779 register IO *wstio;
afd9f252
LW
780 int fd[2];
781
79072805 782 if (!rgv)
afd9f252 783 goto badexit;
79072805 784 if (!wgv)
afd9f252
LW
785 goto badexit;
786
a0d0e21e
LW
787 rstio = GvIOn(rgv);
788 wstio = GvIOn(wgv);
afd9f252 789
a0d0e21e 790 if (IoIFP(rstio))
79072805 791 do_close(rgv,FALSE);
a0d0e21e 792 if (IoIFP(wstio))
79072805 793 do_close(wgv,FALSE);
afd9f252 794
3028581b 795 if (PerlProc_pipe(fd) < 0)
afd9f252 796 goto badexit;
760ac839
LW
797 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
798 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
8990e307 799 IoIFP(wstio) = IoOFP(wstio);
50952442
JH
800 IoTYPE(rstio) = IoTYPE_RDONLY;
801 IoTYPE(wstio) = IoTYPE_WRONLY;
8990e307 802 if (!IoIFP(rstio) || !IoOFP(wstio)) {
760ac839 803 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
3028581b 804 else PerlLIO_close(fd[0]);
760ac839 805 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
3028581b 806 else PerlLIO_close(fd[1]);
fe14fcc3
LW
807 goto badexit;
808 }
afd9f252 809
3280af22 810 sv_setsv(sv,&PL_sv_yes);
afd9f252
LW
811 return;
812
813badexit:
3280af22 814 sv_setsv(sv,&PL_sv_undef);
afd9f252
LW
815 return;
816}
b1248f16 817#endif
afd9f252 818
517844ec 819/* explicit renamed to avoid C++ conflict -- kja */
a687059c 820bool
864dbfa3 821Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 822{
1193dd27
IZ
823 bool retval;
824 IO *io;
a687059c 825
79072805 826 if (!gv)
3280af22 827 gv = PL_argvgv;
a0d0e21e 828 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1d2dff63
GS
829 if (not_implicit)
830 SETERRNO(EBADF,SS$_IVCHAN);
c2ab57d4 831 return FALSE;
99b89507 832 }
79072805
LW
833 io = GvIO(gv);
834 if (!io) { /* never opened */
1d2dff63 835 if (not_implicit) {
2dd78f96
JH
836 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
837 report_evil_fh(gv, io, PL_op->op_type);
1d2dff63
GS
838 SETERRNO(EBADF,SS$_IVCHAN);
839 }
a687059c
LW
840 return FALSE;
841 }
f2b5be74 842 retval = io_close(io, not_implicit);
517844ec 843 if (not_implicit) {
1193dd27
IZ
844 IoLINES(io) = 0;
845 IoPAGE(io) = 0;
846 IoLINES_LEFT(io) = IoPAGE_LEN(io);
847 }
50952442 848 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
849 return retval;
850}
851
852bool
f2b5be74 853Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27
IZ
854{
855 bool retval = FALSE;
856 int status;
857
8990e307 858 if (IoIFP(io)) {
50952442 859 if (IoTYPE(io) == IoTYPE_PIPE) {
3028581b 860 status = PerlProc_pclose(IoIFP(io));
f2b5be74
GS
861 if (not_implicit) {
862 STATUS_NATIVE_SET(status);
863 retval = (STATUS_POSIX == 0);
864 }
865 else {
866 retval = (status != -1);
867 }
a687059c 868 }
50952442 869 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
870 retval = TRUE;
871 else {
8990e307 872 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
760ac839
LW
873 retval = (PerlIO_close(IoOFP(io)) != EOF);
874 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
875 }
876 else
760ac839 877 retval = (PerlIO_close(IoIFP(io)) != EOF);
a687059c 878 }
8990e307 879 IoOFP(io) = IoIFP(io) = Nullfp;
79072805 880 }
f2b5be74 881 else if (not_implicit) {
20408e3c
GS
882 SETERRNO(EBADF,SS$_IVCHAN);
883 }
1193dd27 884
a687059c
LW
885 return retval;
886}
887
888bool
864dbfa3 889Perl_do_eof(pTHX_ GV *gv)
a687059c 890{
79072805 891 register IO *io;
a687059c
LW
892 int ch;
893
79072805 894 io = GvIO(gv);
a687059c 895
79072805 896 if (!io)
a687059c 897 return TRUE;
af8c498a 898 else if (ckWARN(WARN_IO)
50952442 899 && (IoTYPE(io) == IoTYPE_WRONLY || IoIFP(io) == PerlIO_stdout()
af8c498a
GS
900 || IoIFP(io) == PerlIO_stderr()))
901 {
2dd78f96 902 /* integrate to report_evil_fh()? */
a1d180c4 903 char *name = NULL;
2dd78f96
JH
904 if (isGV(gv)) {
905 SV* sv = sv_newmortal();
906 gv_efullname4(sv, gv, Nullch, FALSE);
907 name = SvPV_nolen(sv);
908 }
909 if (name && *name)
910 Perl_warner(aTHX_ WARN_IO,
911 "Filehandle %s opened only for output", name);
912 else
913 Perl_warner(aTHX_ WARN_IO,
914 "Filehandle opened only for output");
af8c498a 915 }
a687059c 916
8990e307 917 while (IoIFP(io)) {
a687059c 918
760ac839 919 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 920 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
921 return FALSE; /* this is the most usual case */
922 }
a687059c 923
760ac839 924 ch = PerlIO_getc(IoIFP(io));
a687059c 925 if (ch != EOF) {
760ac839 926 (void)PerlIO_ungetc(IoIFP(io),ch);
a687059c
LW
927 return FALSE;
928 }
fab3f3a7 929
760ac839 930 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
931 if (PerlIO_get_cnt(IoIFP(io)) < -1)
932 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 933 }
533c011a 934 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
3280af22 935 if (!nextargv(PL_argvgv)) /* get another fp handy */
a687059c
LW
936 return TRUE;
937 }
938 else
939 return TRUE; /* normal fp, definitely end of file */
940 }
941 return TRUE;
942}
943
5ff3f7a4 944Off_t
864dbfa3 945Perl_do_tell(pTHX_ GV *gv)
a687059c 946{
79072805 947 register IO *io;
96e4d5b1 948 register PerlIO *fp;
a687059c 949
96e4d5b1 950 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 951#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
952 if (PerlIO_eof(fp))
953 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 954#endif
8903cb82 955 return PerlIO_tell(fp);
96e4d5b1 956 }
411caa50
JH
957 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
958 report_evil_fh(gv, io, PL_op->op_type);
748a9306 959 SETERRNO(EBADF,RMS$_IFI);
5ff3f7a4 960 return (Off_t)-1;
a687059c
LW
961}
962
963bool
864dbfa3 964Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 965{
79072805 966 register IO *io;
137443ea 967 register PerlIO *fp;
a687059c 968
137443ea 969 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 970#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
971 if (PerlIO_eof(fp))
972 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 973#endif
8903cb82 974 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 975 }
411caa50
JH
976 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
977 report_evil_fh(gv, io, PL_op->op_type);
748a9306 978 SETERRNO(EBADF,RMS$_IFI);
a687059c
LW
979 return FALSE;
980}
981
97cc44eb 982Off_t
864dbfa3 983Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82
PP
984{
985 register IO *io;
986 register PerlIO *fp;
987
988 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
3028581b 989 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
411caa50
JH
990 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
991 report_evil_fh(gv, io, PL_op->op_type);
8903cb82 992 SETERRNO(EBADF,RMS$_IFI);
d9b3e12d 993 return (Off_t)-1;
8903cb82
PP
994}
995
6ff81951 996int
16fe6d59
GS
997Perl_mode_from_discipline(pTHX_ SV *discp)
998{
999 int mode = O_BINARY;
1000 if (discp) {
1001 STRLEN len;
1002 char *s = SvPV(discp,len);
1003 while (*s) {
1004 if (*s == ':') {
1005 switch (s[1]) {
1006 case 'r':
1007 if (len > 3 && strnEQ(s+1, "raw", 3)
1008 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1009 {
1010 mode = O_BINARY;
1011 s += 4;
1012 len -= 4;
1013 break;
1014 }
1015 /* FALL THROUGH */
1016 case 'c':
1017 if (len > 4 && strnEQ(s+1, "crlf", 4)
1018 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1019 {
1020 mode = O_TEXT;
1021 s += 5;
1022 len -= 5;
1023 break;
1024 }
1025 /* FALL THROUGH */
1026 default:
1027 goto fail_discipline;
1028 }
1029 }
1030 else if (isSPACE(*s)) {
1031 ++s;
1032 --len;
1033 }
1034 else {
1035 char *end;
1036fail_discipline:
1037 end = strchr(s+1, ':');
1038 if (!end)
1039 end = s+len;
60382766 1040#ifndef PERLIO_LAYERS
16fe6d59 1041 Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
60382766
NIS
1042#else
1043 s = end;
1044#endif
16fe6d59
GS
1045 }
1046 }
1047 }
1048 return mode;
1049}
1050
1051int
1052Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
6ff81951 1053{
60382766
NIS
1054 /* The old body of this is now in non-LAYER part of perlio.c
1055 * This is a stub for any XS code which might have been calling it.
1056 */
1057 char *name = (O_BINARY != O_TEXT && !(mode & O_BINARY)) ? ":crlf" : ":raw";
1058 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
6ff81951
GS
1059}
1060
a0d0e21e 1061#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
c2ab57d4 1062 /* code courtesy of William Kucharski */
fe14fcc3 1063#define HAS_CHSIZE
6eb13c3b 1064
517844ec 1065I32 my_chsize(fd, length)
79072805 1066I32 fd; /* file descriptor */
85e6fe83 1067Off_t length; /* length to set file to */
6eb13c3b 1068{
6eb13c3b
LW
1069 struct flock fl;
1070 struct stat filebuf;
1071
3028581b 1072 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1073 return -1;
1074
1075 if (filebuf.st_size < length) {
1076
1077 /* extend file length */
1078
3028581b 1079 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1080 return -1;
1081
1082 /* write a "0" byte */
1083
3028581b 1084 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1085 return -1;
1086 }
1087 else {
1088 /* truncate length */
1089
1090 fl.l_whence = 0;
1091 fl.l_len = 0;
1092 fl.l_start = length;
a0d0e21e 1093 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1094
1095 /*
a0d0e21e 1096 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1097 * fcntl(2), which truncates the file so that it ends at the
1098 * position indicated by fl.l_start.
1099 *
1100 * Will minor miracles never cease?
1101 */
1102
a0d0e21e 1103 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1104 return -1;
1105
1106 }
1107
1108 return 0;
1109}
a0d0e21e 1110#endif /* F_FREESP */
ff8e2863 1111
a687059c 1112bool
864dbfa3 1113Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c
LW
1114{
1115 register char *tmps;
463ee0b2 1116 STRLEN len;
a687059c 1117
79072805
LW
1118 /* assuming fp is checked earlier */
1119 if (!sv)
1120 return TRUE;
3280af22 1121 if (PL_ofmt) {
8990e307 1122 if (SvGMAGICAL(sv))
79072805 1123 mg_get(sv);
463ee0b2 1124 if (SvIOK(sv) && SvIVX(sv) != 0) {
65202027 1125 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
760ac839 1126 return !PerlIO_error(fp);
79072805 1127 }
463ee0b2 1128 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
79072805 1129 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
3280af22 1130 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
760ac839 1131 return !PerlIO_error(fp);
79072805 1132 }
a687059c 1133 }
79072805
LW
1134 switch (SvTYPE(sv)) {
1135 case SVt_NULL:
411caa50
JH
1136 if (ckWARN(WARN_UNINITIALIZED))
1137 report_uninit();
ff8e2863 1138 return TRUE;
79072805 1139 case SVt_IV:
a0d0e21e
LW
1140 if (SvIOK(sv)) {
1141 if (SvGMAGICAL(sv))
1142 mg_get(sv);
cf2093f6 1143 if (SvIsUV(sv))
57def98f 1144 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
cf2093f6 1145 else
57def98f 1146 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
760ac839 1147 return !PerlIO_error(fp);
a0d0e21e
LW
1148 }
1149 /* FALL THROUGH */
79072805 1150 default:
7d59b7e4
NIS
1151 if (PerlIO_isutf8(fp)) {
1152 tmps = SvPVutf8(sv, len);
1153 }
1154 else {
1155 if (DO_UTF8(sv))
1156 sv_utf8_downgrade(sv, FALSE);
1157 tmps = SvPV(sv, len);
1158 }
79072805 1159 break;
ff8e2863 1160 }
94e4c244
JH
1161 /* To detect whether the process is about to overstep its
1162 * filesize limit we would need getrlimit(). We could then
1163 * also transparently raise the limit with setrlimit() --
1164 * but only until the system hard limit/the filesystem limit,
c5dd3cdd
JH
1165 * at which we would get EPERM. Note that when using buffered
1166 * io the write failure can be delayed until the flush/close. --jhi */
a21ac455 1167 if (len && (PerlIO_write(fp,tmps,len) == 0))
a687059c 1168 return FALSE;
760ac839 1169 return !PerlIO_error(fp);
a687059c
LW
1170}
1171
79072805 1172I32
cea2e8a9 1173Perl_my_stat(pTHX)
a687059c 1174{
4e35701f 1175 djSP;
79072805 1176 IO *io;
2dd78f96 1177 GV* gv;
79072805 1178
533c011a 1179 if (PL_op->op_flags & OPf_REF) {
924508f0 1180 EXTEND(SP,1);
2dd78f96 1181 gv = cGVOP_gv;
748a9306 1182 do_fstat:
2dd78f96 1183 io = GvIO(gv);
8990e307 1184 if (io && IoIFP(io)) {
2dd78f96 1185 PL_statgv = gv;
3280af22
NIS
1186 sv_setpv(PL_statname,"");
1187 PL_laststype = OP_STAT;
1188 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
a687059c
LW
1189 }
1190 else {
2dd78f96 1191 if (gv == PL_defgv)
3280af22 1192 return PL_laststatval;
2dd78f96
JH
1193 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1194 report_evil_fh(gv, io, PL_op->op_type);
3280af22
NIS
1195 PL_statgv = Nullgv;
1196 sv_setpv(PL_statname,"");
1197 return (PL_laststatval = -1);
a687059c
LW
1198 }
1199 }
1200 else {
748a9306 1201 SV* sv = POPs;
4b74e3fb 1202 char *s;
2d8e6c8d 1203 STRLEN n_a;
79072805 1204 PUTBACK;
748a9306 1205 if (SvTYPE(sv) == SVt_PVGV) {
2dd78f96 1206 gv = (GV*)sv;
748a9306
LW
1207 goto do_fstat;
1208 }
1209 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
2dd78f96 1210 gv = (GV*)SvRV(sv);
748a9306
LW
1211 goto do_fstat;
1212 }
1213
2d8e6c8d 1214 s = SvPV(sv, n_a);
3280af22
NIS
1215 PL_statgv = Nullgv;
1216 sv_setpv(PL_statname, s);
1217 PL_laststype = OP_STAT;
1218 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
599cee73 1219 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
cea2e8a9 1220 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
3280af22 1221 return PL_laststatval;
a687059c
LW
1222 }
1223}
1224
79072805 1225I32
cea2e8a9 1226Perl_my_lstat(pTHX)
c623bd54 1227{
4e35701f 1228 djSP;
79072805 1229 SV *sv;
2d8e6c8d 1230 STRLEN n_a;
533c011a 1231 if (PL_op->op_flags & OPf_REF) {
924508f0 1232 EXTEND(SP,1);
638eceb6 1233 if (cGVOP_gv == PL_defgv) {
3280af22 1234 if (PL_laststype != OP_LSTAT)
cea2e8a9 1235 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
3280af22 1236 return PL_laststatval;
fe14fcc3 1237 }
cea2e8a9 1238 Perl_croak(aTHX_ "You can't use -l on a filehandle");
fe14fcc3 1239 }
c623bd54 1240
3280af22
NIS
1241 PL_laststype = OP_LSTAT;
1242 PL_statgv = Nullgv;
79072805
LW
1243 sv = POPs;
1244 PUTBACK;
2d8e6c8d 1245 sv_setpv(PL_statname,SvPV(sv, n_a));
2d8e6c8d 1246 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
2d8e6c8d 1247 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
cea2e8a9 1248 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
3280af22 1249 return PL_laststatval;
c623bd54
LW
1250}
1251
a687059c 1252bool
864dbfa3 1253Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
a687059c 1254{
d5a9bfb0
IZ
1255 return do_aexec5(really, mark, sp, 0, 0);
1256}
1257
1258bool
2aa1486d
GS
1259Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1260 int fd, int do_report)
d5a9bfb0 1261{
cd39f2b6
JH
1262#ifdef MACOS_TRADITIONAL
1263 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1264#else
a687059c 1265 register char **a;
a687059c 1266 char *tmps;
2d8e6c8d 1267 STRLEN n_a;
a687059c 1268
79072805 1269 if (sp > mark) {
3280af22
NIS
1270 New(401,PL_Argv, sp - mark + 1, char*);
1271 a = PL_Argv;
79072805
LW
1272 while (++mark <= sp) {
1273 if (*mark)
2d8e6c8d 1274 *a++ = SvPVx(*mark, n_a);
a687059c
LW
1275 else
1276 *a++ = "";
1277 }
1278 *a = Nullch;
3280af22 1279 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
79072805 1280 TAINT_ENV(); /* testing IFS here is overkill, probably */
2d8e6c8d 1281 if (really && *(tmps = SvPV(really, n_a)))
b4748376 1282 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1283 else
b4748376 1284 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
599cee73 1285 if (ckWARN(WARN_EXEC))
a1d180c4 1286 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
599cee73 1287 PL_Argv[0], Strerror(errno));
d5a9bfb0
IZ
1288 if (do_report) {
1289 int e = errno;
1290
1291 PerlLIO_write(fd, (void*)&e, sizeof(int));
1292 PerlLIO_close(fd);
1293 }
a687059c 1294 }
bee1dbe2 1295 do_execfree();
cd39f2b6 1296#endif
a687059c
LW
1297 return FALSE;
1298}
1299
fe14fcc3 1300void
864dbfa3 1301Perl_do_execfree(pTHX)
ff8e2863 1302{
3280af22
NIS
1303 if (PL_Argv) {
1304 Safefree(PL_Argv);
1305 PL_Argv = Null(char **);
ff8e2863 1306 }
3280af22
NIS
1307 if (PL_Cmd) {
1308 Safefree(PL_Cmd);
1309 PL_Cmd = Nullch;
ff8e2863
LW
1310 }
1311}
1312
cd39f2b6 1313#if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 1314
a687059c 1315bool
864dbfa3 1316Perl_do_exec(pTHX_ char *cmd)
a687059c 1317{
e446cec8
IZ
1318 return do_exec3(cmd,0,0);
1319}
1320
1321bool
864dbfa3 1322Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
e446cec8 1323{
a687059c
LW
1324 register char **a;
1325 register char *s;
a687059c
LW
1326 char flags[10];
1327
748a9306
LW
1328 while (*cmd && isSPACE(*cmd))
1329 cmd++;
1330
a687059c
LW
1331 /* save an extra exec if possible */
1332
bf38876a 1333#ifdef CSH
3280af22 1334 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
a687059c 1335 strcpy(flags,"-c");
3280af22 1336 s = cmd+PL_cshlen+3;
a687059c
LW
1337 if (*s == 'f') {
1338 s++;
1339 strcat(flags,"f");
1340 }
1341 if (*s == ' ')
1342 s++;
1343 if (*s++ == '\'') {
1344 char *ncmd = s;
1345
1346 while (*s)
1347 s++;
1348 if (s[-1] == '\n')
1349 *--s = '\0';
1350 if (s[-1] == '\'') {
1351 *--s = '\0';
3280af22 1352 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
a687059c
LW
1353 *s = '\'';
1354 return FALSE;
1355 }
1356 }
1357 }
bf38876a 1358#endif /* CSH */
a687059c
LW
1359
1360 /* see if there are shell metacharacters in it */
1361
748a9306
LW
1362 if (*cmd == '.' && isSPACE(cmd[1]))
1363 goto doshell;
1364
1365 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1366 goto doshell;
1367
c170e444 1368 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
63f2c1e1
LW
1369 if (*s == '=')
1370 goto doshell;
748a9306 1371
a687059c 1372 for (s = cmd; *s; s++) {
93a17b20 1373 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1374 if (*s == '\n' && !s[1]) {
1375 *s = '\0';
1376 break;
1377 }
603a98b0
IZ
1378 /* handle the 2>&1 construct at the end */
1379 if (*s == '>' && s[1] == '&' && s[2] == '1'
1380 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1381 && (!s[3] || isSPACE(s[3])))
1382 {
1383 char *t = s + 3;
1384
1385 while (*t && isSPACE(*t))
1386 ++t;
1387 if (!*t && (dup2(1,2) != -1)) {
1388 s[-2] = '\0';
1389 break;
1390 }
1391 }
a687059c 1392 doshell:
3280af22 1393 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
a687059c
LW
1394 return FALSE;
1395 }
1396 }
748a9306 1397
3280af22
NIS
1398 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1399 PL_Cmd = savepvn(cmd, s-cmd);
1400 a = PL_Argv;
1401 for (s = PL_Cmd; *s;) {
99b89507 1402 while (*s && isSPACE(*s)) s++;
a687059c
LW
1403 if (*s)
1404 *(a++) = s;
99b89507 1405 while (*s && !isSPACE(*s)) s++;
a687059c
LW
1406 if (*s)
1407 *s++ = '\0';
1408 }
1409 *a = Nullch;
3280af22
NIS
1410 if (PL_Argv[0]) {
1411 PerlProc_execvp(PL_Argv[0],PL_Argv);
b1248f16 1412 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1413 do_execfree();
a687059c 1414 goto doshell;
b1248f16 1415 }
d008e5eb 1416 {
e446cec8
IZ
1417 int e = errno;
1418
d008e5eb 1419 if (ckWARN(WARN_EXEC))
a1d180c4 1420 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
d008e5eb 1421 PL_Argv[0], Strerror(errno));
e446cec8
IZ
1422 if (do_report) {
1423 PerlLIO_write(fd, (void*)&e, sizeof(int));
1424 PerlLIO_close(fd);
1425 }
d008e5eb 1426 }
a687059c 1427 }
ff8e2863 1428 do_execfree();
a687059c
LW
1429 return FALSE;
1430}
1431
6890e559 1432#endif /* OS2 || WIN32 */
760ac839 1433
79072805 1434I32
864dbfa3 1435Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1436{
79072805
LW
1437 register I32 val;
1438 register I32 val2;
1439 register I32 tot = 0;
20408e3c 1440 char *what;
a687059c 1441 char *s;
79072805 1442 SV **oldmark = mark;
2d8e6c8d 1443 STRLEN n_a;
a687059c 1444
20408e3c 1445#define APPLY_TAINT_PROPER() \
3280af22 1446 STMT_START { \
17406bd6 1447 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1448 } STMT_END
20408e3c
GS
1449
1450 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1451 if (PL_tainting) {
463ee0b2 1452 while (++mark <= sp) {
bbce6d69
PP
1453 if (SvTAINTED(*mark)) {
1454 TAINT;
1455 break;
1456 }
463ee0b2
LW
1457 }
1458 mark = oldmark;
1459 }
a687059c 1460 switch (type) {
79072805 1461 case OP_CHMOD:
20408e3c
GS
1462 what = "chmod";
1463 APPLY_TAINT_PROPER();
79072805 1464 if (++mark <= sp) {
463ee0b2 1465 val = SvIVx(*mark);
20408e3c
GS
1466 APPLY_TAINT_PROPER();
1467 tot = sp - mark;
79072805 1468 while (++mark <= sp) {
2d8e6c8d 1469 char *name = SvPVx(*mark, n_a);
20408e3c
GS
1470 APPLY_TAINT_PROPER();
1471 if (PerlLIO_chmod(name, val))
a687059c
LW
1472 tot--;
1473 }
1474 }
1475 break;
fe14fcc3 1476#ifdef HAS_CHOWN
79072805 1477 case OP_CHOWN:
20408e3c
GS
1478 what = "chown";
1479 APPLY_TAINT_PROPER();
79072805 1480 if (sp - mark > 2) {
463ee0b2
LW
1481 val = SvIVx(*++mark);
1482 val2 = SvIVx(*++mark);
20408e3c 1483 APPLY_TAINT_PROPER();
a0d0e21e 1484 tot = sp - mark;
79072805 1485 while (++mark <= sp) {
2d8e6c8d 1486 char *name = SvPVx(*mark, n_a);
20408e3c 1487 APPLY_TAINT_PROPER();
36660982 1488 if (PerlLIO_chown(name, val, val2))
a687059c
LW
1489 tot--;
1490 }
1491 }
1492 break;
b1248f16 1493#endif
a1d180c4 1494/*
dd64f1c3
AD
1495XXX Should we make lchown() directly available from perl?
1496For now, we'll let Configure test for HAS_LCHOWN, but do
1497nothing in the core.
1498 --AD 5/1998
1499*/
fe14fcc3 1500#ifdef HAS_KILL
79072805 1501 case OP_KILL:
20408e3c
GS
1502 what = "kill";
1503 APPLY_TAINT_PROPER();
55497cff
PP
1504 if (mark == sp)
1505 break;
2d8e6c8d 1506 s = SvPVx(*++mark, n_a);
79072805
LW
1507 if (isUPPER(*s)) {
1508 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1509 s += 3;
1510 if (!(val = whichsig(s)))
cea2e8a9 1511 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1512 }
1513 else
463ee0b2 1514 val = SvIVx(*mark);
20408e3c
GS
1515 APPLY_TAINT_PROPER();
1516 tot = sp - mark;
3595fcef
PP
1517#ifdef VMS
1518 /* kill() doesn't do process groups (job trees?) under VMS */
1519 if (val < 0) val = -val;
1520 if (val == SIGKILL) {
1521# include <starlet.h>
1522 /* Use native sys$delprc() to insure that target process is
1523 * deleted; supervisor-mode images don't pay attention to
1524 * CRTL's emulation of Unix-style signals and kill()
1525 */
1526 while (++mark <= sp) {
1527 I32 proc = SvIVx(*mark);
1528 register unsigned long int __vmssts;
20408e3c 1529 APPLY_TAINT_PROPER();
3595fcef
PP
1530 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1531 tot--;
1532 switch (__vmssts) {
1533 case SS$_NONEXPR:
1534 case SS$_NOSUCHNODE:
1535 SETERRNO(ESRCH,__vmssts);
1536 break;
1537 case SS$_NOPRIV:
1538 SETERRNO(EPERM,__vmssts);
1539 break;
1540 default:
1541 SETERRNO(EVMSERR,__vmssts);
1542 }
1543 }
1544 }
1545 break;
1546 }
1547#endif
79072805
LW
1548 if (val < 0) {
1549 val = -val;
1550 while (++mark <= sp) {
463ee0b2 1551 I32 proc = SvIVx(*mark);
20408e3c 1552 APPLY_TAINT_PROPER();
fe14fcc3 1553#ifdef HAS_KILLPG
3028581b 1554 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1555#else
3028581b 1556 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1557#endif
79072805 1558 tot--;
a687059c 1559 }
79072805
LW
1560 }
1561 else {
1562 while (++mark <= sp) {
20408e3c
GS
1563 I32 proc = SvIVx(*mark);
1564 APPLY_TAINT_PROPER();
1565 if (PerlProc_kill(proc, val))
79072805 1566 tot--;
a687059c
LW
1567 }
1568 }
1569 break;
b1248f16 1570#endif
79072805 1571 case OP_UNLINK:
20408e3c
GS
1572 what = "unlink";
1573 APPLY_TAINT_PROPER();
79072805
LW
1574 tot = sp - mark;
1575 while (++mark <= sp) {
2d8e6c8d 1576 s = SvPVx(*mark, n_a);
20408e3c 1577 APPLY_TAINT_PROPER();
3280af22 1578 if (PL_euid || PL_unsafe) {
a687059c
LW
1579 if (UNLINK(s))
1580 tot--;
1581 }
1582 else { /* don't let root wipe out directories without -U */
3280af22 1583 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1584 tot--;
1585 else {
1586 if (UNLINK(s))
1587 tot--;
1588 }
1589 }
1590 }
1591 break;
a0d0e21e 1592#ifdef HAS_UTIME
79072805 1593 case OP_UTIME:
20408e3c
GS
1594 what = "utime";
1595 APPLY_TAINT_PROPER();
79072805 1596 if (sp - mark > 2) {
748a9306 1597#if defined(I_UTIME) || defined(VMS)
663a0e37
LW
1598 struct utimbuf utbuf;
1599#else
a687059c 1600 struct {
dd2821f6
GS
1601 Time_t actime;
1602 Time_t modtime;
a687059c 1603 } utbuf;
663a0e37 1604#endif
a687059c 1605
afd9f252 1606 Zero(&utbuf, sizeof utbuf, char);
517844ec 1607#ifdef BIG_TIME
dd2821f6
GS
1608 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1609 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
517844ec 1610#else
dd2821f6
GS
1611 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1612 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
517844ec 1613#endif
20408e3c 1614 APPLY_TAINT_PROPER();
79072805
LW
1615 tot = sp - mark;
1616 while (++mark <= sp) {
2d8e6c8d 1617 char *name = SvPVx(*mark, n_a);
20408e3c
GS
1618 APPLY_TAINT_PROPER();
1619 if (PerlLIO_utime(name, &utbuf))
a687059c
LW
1620 tot--;
1621 }
a687059c
LW
1622 }
1623 else
79072805 1624 tot = 0;
a687059c 1625 break;
a0d0e21e 1626#endif
a687059c
LW
1627 }
1628 return tot;
20408e3c 1629
20408e3c 1630#undef APPLY_TAINT_PROPER
a687059c
LW
1631}
1632
1633/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1634#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae
JH
1635bool
1636Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1637/* Note: we use `effective' both for uids and gids.
1638 * Here we are betting on Uid_t being equal or wider than Gid_t. */
a687059c 1639{
bee1dbe2 1640#ifdef DOSISH
fe14fcc3
LW
1641 /* [Comments and code from Len Reed]
1642 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1643 * to write-protected files. The execute permission bit is set
1644 * by the Miscrosoft C library stat() function for the following:
1645 * .exe files
1646 * .com files
1647 * .bat files
1648 * directories
1649 * All files and directories are readable.
1650 * Directories and special files, e.g. "CON", cannot be
1651 * write-protected.
1652 * [Comment by Tom Dinger -- a directory can have the write-protect
1653 * bit set in the file system, but DOS permits changes to
1654 * the directory anyway. In addition, all bets are off
1655 * here for networked software, such as Novell and
1656 * Sun's PC-NFS.]
1657 */
1658
bee1dbe2
LW
1659 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1660 * too so it will actually look into the files for magic numbers
1661 */
7f4774ae 1662 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1663
55497cff 1664#else /* ! DOSISH */
3280af22 1665 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
7f4774ae 1666 if (mode == S_IXUSR) {
c623bd54 1667 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1668 return TRUE;
1669 }
1670 else
1671 return TRUE; /* root reads and writes anything */
1672 return FALSE;
1673 }
3280af22 1674 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
7f4774ae 1675 if (statbufp->st_mode & mode)
a687059c
LW
1676 return TRUE; /* ok as "user" */
1677 }
d8eceb89 1678 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 1679 if (statbufp->st_mode & mode >> 3)
a687059c
LW
1680 return TRUE; /* ok as "group" */
1681 }
7f4774ae 1682 else if (statbufp->st_mode & mode >> 6)
a687059c
LW
1683 return TRUE; /* ok as "other" */
1684 return FALSE;
55497cff 1685#endif /* ! DOSISH */
a687059c 1686}
a0d0e21e 1687#endif /* ! VMS */
a687059c 1688
d8eceb89
JH
1689bool
1690Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
a687059c 1691{
cd39f2b6
JH
1692#ifdef MACOS_TRADITIONAL
1693 /* This is simply not correct for AppleShare, but fix it yerself. */
1694 return TRUE;
1695#else
3280af22 1696 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1697 return TRUE;
fe14fcc3 1698#ifdef HAS_GETGROUPS
a687059c
LW
1699#ifndef NGROUPS
1700#define NGROUPS 32
1701#endif
1702 {
a0d0e21e 1703 Groups_t gary[NGROUPS];
79072805 1704 I32 anum;
a687059c
LW
1705
1706 anum = getgroups(NGROUPS,gary);
1707 while (--anum >= 0)
1708 if (gary[anum] == testgid)
1709 return TRUE;
1710 }
1711#endif
1712 return FALSE;
cd39f2b6 1713#endif
a687059c 1714}
c2ab57d4 1715
fe14fcc3 1716#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1717
79072805 1718I32
864dbfa3 1719Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1720{
c2ab57d4 1721 key_t key;
79072805 1722 I32 n, flags;
c2ab57d4 1723
463ee0b2
LW
1724 key = (key_t)SvNVx(*++mark);
1725 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1726 flags = SvIVx(*++mark);
748a9306 1727 SETERRNO(0,0);
c2ab57d4
LW
1728 switch (optype)
1729 {
fe14fcc3 1730#ifdef HAS_MSG
79072805 1731 case OP_MSGGET:
c2ab57d4 1732 return msgget(key, flags);
e5d73d77 1733#endif
fe14fcc3 1734#ifdef HAS_SEM
79072805 1735 case OP_SEMGET:
c2ab57d4 1736 return semget(key, n, flags);
e5d73d77 1737#endif
fe14fcc3 1738#ifdef HAS_SHM
79072805 1739 case OP_SHMGET:
c2ab57d4 1740 return shmget(key, n, flags);
e5d73d77 1741#endif
fe14fcc3 1742#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1743 default:
cea2e8a9 1744 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1745#endif
c2ab57d4
LW
1746 }
1747 return -1; /* should never happen */
1748}
1749
79072805 1750I32
864dbfa3 1751Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1752{
79072805 1753 SV *astr;
c2ab57d4 1754 char *a;
a0d0e21e
LW
1755 I32 id, n, cmd, infosize, getinfo;
1756 I32 ret = -1;
c2ab57d4 1757
463ee0b2
LW
1758 id = SvIVx(*++mark);
1759 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1760 cmd = SvIVx(*++mark);
79072805 1761 astr = *++mark;
c2ab57d4
LW
1762 infosize = 0;
1763 getinfo = (cmd == IPC_STAT);
1764
1765 switch (optype)
1766 {
fe14fcc3 1767#ifdef HAS_MSG
79072805 1768 case OP_MSGCTL:
c2ab57d4
LW
1769 if (cmd == IPC_STAT || cmd == IPC_SET)
1770 infosize = sizeof(struct msqid_ds);
1771 break;
e5d73d77 1772#endif
fe14fcc3 1773#ifdef HAS_SHM
79072805 1774 case OP_SHMCTL:
c2ab57d4
LW
1775 if (cmd == IPC_STAT || cmd == IPC_SET)
1776 infosize = sizeof(struct shmid_ds);
1777 break;
e5d73d77 1778#endif
fe14fcc3 1779#ifdef HAS_SEM
79072805 1780 case OP_SEMCTL:
39398f3f 1781#ifdef Semctl
c2ab57d4
LW
1782 if (cmd == IPC_STAT || cmd == IPC_SET)
1783 infosize = sizeof(struct semid_ds);
1784 else if (cmd == GETALL || cmd == SETALL)
1785 {
8e591e46 1786 struct semid_ds semds;
bd89102f 1787 union semun semun;
e6f0bdd6
GS
1788#ifdef EXTRA_F_IN_SEMUN_BUF
1789 semun.buff = &semds;
1790#else
84902520 1791 semun.buf = &semds;
e6f0bdd6 1792#endif
c2ab57d4 1793 getinfo = (cmd == GETALL);
9b89d93d
GB
1794 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1795 return -1;
6e21c824
LW
1796 infosize = semds.sem_nsems * sizeof(short);
1797 /* "short" is technically wrong but much more portable
1798 than guessing about u_?short(_t)? */
c2ab57d4 1799 }
39398f3f 1800#else
cea2e8a9 1801 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 1802#endif
c2ab57d4 1803 break;
e5d73d77 1804#endif
fe14fcc3 1805#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1806 default:
cea2e8a9 1807 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1808#endif
c2ab57d4
LW
1809 }
1810
1811 if (infosize)
1812 {
a0d0e21e 1813 STRLEN len;
c2ab57d4
LW
1814 if (getinfo)
1815 {
a0d0e21e
LW
1816 SvPV_force(astr, len);
1817 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
1818 }
1819 else
1820 {
463ee0b2
LW
1821 a = SvPV(astr, len);
1822 if (len != infosize)
cea2e8a9 1823 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
1824 PL_op_desc[optype],
1825 (unsigned long)len,
1826 (long)infosize);
c2ab57d4
LW
1827 }
1828 }
1829 else
1830 {
c030ccd9 1831 IV i = SvIV(astr);
56431972 1832 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 1833 }
748a9306 1834 SETERRNO(0,0);
c2ab57d4
LW
1835 switch (optype)
1836 {
fe14fcc3 1837#ifdef HAS_MSG
79072805 1838 case OP_MSGCTL:
bee1dbe2 1839 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 1840 break;
e5d73d77 1841#endif
fe14fcc3 1842#ifdef HAS_SEM
bd89102f 1843 case OP_SEMCTL: {
39398f3f 1844#ifdef Semctl
bd89102f
AD
1845 union semun unsemds;
1846
e6f0bdd6
GS
1847#ifdef EXTRA_F_IN_SEMUN_BUF
1848 unsemds.buff = (struct semid_ds *)a;
1849#else
bd89102f 1850 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 1851#endif
bd89102f 1852 ret = Semctl(id, n, cmd, unsemds);
39398f3f 1853#else
cea2e8a9 1854 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 1855#endif
bd89102f 1856 }
c2ab57d4 1857 break;
e5d73d77 1858#endif
fe14fcc3 1859#ifdef HAS_SHM
79072805 1860 case OP_SHMCTL:
bee1dbe2 1861 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 1862 break;
e5d73d77 1863#endif
c2ab57d4
LW
1864 }
1865 if (getinfo && ret >= 0) {
79072805
LW
1866 SvCUR_set(astr, infosize);
1867 *SvEND(astr) = '\0';
a0d0e21e 1868 SvSETMAGIC(astr);
c2ab57d4
LW
1869 }
1870 return ret;
1871}
1872
79072805 1873I32
864dbfa3 1874Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 1875{
fe14fcc3 1876#ifdef HAS_MSG
79072805 1877 SV *mstr;
c2ab57d4 1878 char *mbuf;
79072805 1879 I32 id, msize, flags;
463ee0b2 1880 STRLEN len;
c2ab57d4 1881
463ee0b2 1882 id = SvIVx(*++mark);
79072805 1883 mstr = *++mark;
463ee0b2
LW
1884 flags = SvIVx(*++mark);
1885 mbuf = SvPV(mstr, len);
1886 if ((msize = len - sizeof(long)) < 0)
cea2e8a9 1887 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 1888 SETERRNO(0,0);
bee1dbe2 1889 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 1890#else
cea2e8a9 1891 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 1892#endif
c2ab57d4
LW
1893}
1894
79072805 1895I32
864dbfa3 1896Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 1897{
fe14fcc3 1898#ifdef HAS_MSG
79072805 1899 SV *mstr;
c2ab57d4
LW
1900 char *mbuf;
1901 long mtype;
79072805 1902 I32 id, msize, flags, ret;
463ee0b2 1903 STRLEN len;
79072805 1904
463ee0b2 1905 id = SvIVx(*++mark);
79072805 1906 mstr = *++mark;
c2e66d9e
GS
1907 /* suppress warning when reading into undef var --jhi */
1908 if (! SvOK(mstr))
1909 sv_setpvn(mstr, "", 0);
463ee0b2
LW
1910 msize = SvIVx(*++mark);
1911 mtype = (long)SvIVx(*++mark);
1912 flags = SvIVx(*++mark);
a0d0e21e
LW
1913 SvPV_force(mstr, len);
1914 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 1915
748a9306 1916 SETERRNO(0,0);
bee1dbe2 1917 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 1918 if (ret >= 0) {
79072805
LW
1919 SvCUR_set(mstr, sizeof(long)+ret);
1920 *SvEND(mstr) = '\0';
41d6edb2
JH
1921#ifndef INCOMPLETE_TAINTS
1922 /* who knows who has been playing with this message? */
1923 SvTAINTED_on(mstr);
1924#endif
c2ab57d4
LW
1925 }
1926 return ret;
e5d73d77 1927#else
cea2e8a9 1928 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 1929#endif
c2ab57d4
LW
1930}
1931
79072805 1932I32
864dbfa3 1933Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 1934{
fe14fcc3 1935#ifdef HAS_SEM
79072805 1936 SV *opstr;
c2ab57d4 1937 char *opbuf;
463ee0b2
LW
1938 I32 id;
1939 STRLEN opsize;
c2ab57d4 1940
463ee0b2 1941 id = SvIVx(*++mark);
79072805 1942 opstr = *++mark;
463ee0b2 1943 opbuf = SvPV(opstr, opsize);
c2ab57d4
LW
1944 if (opsize < sizeof(struct sembuf)
1945 || (opsize % sizeof(struct sembuf)) != 0) {
748a9306 1946 SETERRNO(EINVAL,LIB$_INVARG);
c2ab57d4
LW
1947 return -1;
1948 }
748a9306 1949 SETERRNO(0,0);
6e21c824 1950 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
e5d73d77 1951#else
cea2e8a9 1952 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 1953#endif
c2ab57d4
LW
1954}
1955
79072805 1956I32
864dbfa3 1957Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1958{
fe14fcc3 1959#ifdef HAS_SHM
79072805 1960 SV *mstr;
c2ab57d4 1961 char *mbuf, *shm;
79072805 1962 I32 id, mpos, msize;
463ee0b2 1963 STRLEN len;
c2ab57d4 1964 struct shmid_ds shmds;
c2ab57d4 1965
463ee0b2 1966 id = SvIVx(*++mark);
79072805 1967 mstr = *++mark;
463ee0b2
LW
1968 mpos = SvIVx(*++mark);
1969 msize = SvIVx(*++mark);
748a9306 1970 SETERRNO(0,0);
c2ab57d4
LW
1971 if (shmctl(id, IPC_STAT, &shmds) == -1)
1972 return -1;
1973 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
748a9306 1974 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
1975 return -1;
1976 }
8ac85365 1977 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
1978 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1979 return -1;
79072805 1980 if (optype == OP_SHMREAD) {
9f538c04
GS
1981 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
1982 if (! SvOK(mstr))
1983 sv_setpvn(mstr, "", 0);
a0d0e21e
LW
1984 SvPV_force(mstr, len);
1985 mbuf = SvGROW(mstr, msize+1);
1986
bee1dbe2 1987 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
1988 SvCUR_set(mstr, msize);
1989 *SvEND(mstr) = '\0';
a0d0e21e 1990 SvSETMAGIC(mstr);
d929ce6f
JH
1991#ifndef INCOMPLETE_TAINTS
1992 /* who knows who has been playing with this shared memory? */
1993 SvTAINTED_on(mstr);
1994#endif
c2ab57d4
LW
1995 }
1996 else {
79072805 1997 I32 n;
c2ab57d4 1998
a0d0e21e 1999 mbuf = SvPV(mstr, len);
463ee0b2 2000 if ((n = len) > msize)
c2ab57d4 2001 n = msize;
bee1dbe2 2002 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2003 if (n < msize)
bee1dbe2 2004 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2005 }
2006 return shmdt(shm);
e5d73d77 2007#else
cea2e8a9 2008 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2009#endif
c2ab57d4
LW
2010}
2011
fe14fcc3 2012#endif /* SYSV IPC */
4e35701f 2013
fab3f3a7 2014