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[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
b94e2f88 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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/*
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."
a687059c
LW
16 */
17
166f8a29
DM
18/* This file contains functions that do the actual I/O on behalf of ops.
19 * For example, pp_print() calls the do_print() function in this file for
20 * each argument needing printing.
21 */
22
a687059c 23#include "EXTERN.h"
864dbfa3 24#define PERL_IN_DOIO_C
a687059c
LW
25#include "perl.h"
26
fe14fcc3 27#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 28#ifndef HAS_SEM
c2ab57d4 29#include <sys/ipc.h>
aec308ec 30#endif
fe14fcc3 31#ifdef HAS_MSG
c2ab57d4 32#include <sys/msg.h>
e5d73d77 33#endif
fe14fcc3 34#ifdef HAS_SHM
c2ab57d4 35#include <sys/shm.h>
a0d0e21e 36# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 37 extern Shmat_t shmat (int, char *, int);
a0d0e21e 38# endif
c2ab57d4 39#endif
e5d73d77 40#endif
c2ab57d4 41
663a0e37 42#ifdef I_UTIME
3730b96e 43# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
PP
44# include <sys/utime.h>
45# else
46# include <utime.h>
47# endif
663a0e37 48#endif
85aff577 49
85aff577
CS
50#ifdef O_EXCL
51# define OPEN_EXCL O_EXCL
52#else
53# define OPEN_EXCL 0
54#endif
a687059c 55
0c19750d
SP
56#define PERL_MODE_MAX 8
57#define PERL_FLAGS_MAX 10
58
76121258 59#include <signal.h>
76121258 60
a687059c 61bool
2fbb330f 62Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw,
a567e93b
NIS
63 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
64 I32 num_svs)
65{
27da23d5 66 dVAR;
890ce7af 67 register IO * const io = GvIOn(gv);
4608196e
RGS
68 PerlIO *saveifp = NULL;
69 PerlIO *saveofp = NULL;
ee518936 70 int savefd = -1;
9f37169a 71 char savetype = IoTYPE_CLOSED;
c07a80fd 72 int writing = 0;
760ac839 73 PerlIO *fp;
c07a80fd
PP
74 int fd;
75 int result;
3500f679 76 bool was_fdopen = FALSE;
16fe6d59 77 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
b931b1d9 78 char *type = NULL;
0c19750d 79 char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
ee518936 80 SV *namesv;
a687059c 81
b931b1d9 82 Zero(mode,sizeof(mode),char);
3280af22 83 PL_forkprocess = 1; /* assume true if no fork */
c07a80fd 84
b931b1d9 85 /* Collect default raw/crlf info from the op */
16fe6d59 86 if (PL_op && PL_op->op_type == OP_OPEN) {
c2be40b1 87 /* set up IO layers */
b464bac0 88 const U8 flags = PL_op->op_private;
16fe6d59
GS
89 in_raw = (flags & OPpOPEN_IN_RAW);
90 in_crlf = (flags & OPpOPEN_IN_CRLF);
91 out_raw = (flags & OPpOPEN_OUT_RAW);
92 out_crlf = (flags & OPpOPEN_OUT_CRLF);
93 }
94
b931b1d9 95 /* If currently open - close before we re-open */
a0d0e21e 96 if (IoIFP(io)) {
760ac839 97 fd = PerlIO_fileno(IoIFP(io));
ee518936
NIS
98 if (IoTYPE(io) == IoTYPE_STD) {
99 /* This is a clone of one of STD* handles */
c2ab57d4 100 result = 0;
ee518936
NIS
101 }
102 else if (fd >= 0 && fd <= PL_maxsysfd) {
103 /* This is one of the original STD* handles */
104 saveifp = IoIFP(io);
105 saveofp = IoOFP(io);
8990e307 106 savetype = IoTYPE(io);
ee518936
NIS
107 savefd = fd;
108 result = 0;
6e21c824 109 }
50952442 110 else if (IoTYPE(io) == IoTYPE_PIPE)
3028581b 111 result = PerlProc_pclose(IoIFP(io));
8990e307
LW
112 else if (IoIFP(io) != IoOFP(io)) {
113 if (IoOFP(io)) {
760ac839 114 result = PerlIO_close(IoOFP(io));
6170680b 115 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
116 }
117 else
760ac839 118 result = PerlIO_close(IoIFP(io));
a687059c 119 }
a687059c 120 else
760ac839 121 result = PerlIO_close(IoIFP(io));
ee518936
NIS
122 if (result == EOF && fd > PL_maxsysfd) {
123 /* Why is this not Perl_warn*() call ? */
bf49b057 124 PerlIO_printf(Perl_error_log,
6170680b
IZ
125 "Warning: unable to close filehandle %s properly.\n",
126 GvENAME(gv));
ee518936 127 }
4608196e 128 IoOFP(io) = IoIFP(io) = NULL;
a687059c 129 }
c07a80fd
PP
130
131 if (as_raw) {
b931b1d9 132 /* sysopen style args, i.e. integer mode and permissions */
ee518936 133 STRLEN ix = 0;
e1ec3a88 134 const int appendtrunc =
3dccc55c 135 0
d1da7611 136#ifdef O_APPEND /* Not fully portable. */
3dccc55c 137 |O_APPEND
d1da7611
JH
138#endif
139#ifdef O_TRUNC /* Not fully portable. */
3dccc55c 140 |O_TRUNC
d1da7611 141#endif
3dccc55c 142 ;
6867be6d 143 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
3dccc55c
JH
144 int ismodifying;
145
146 if (num_svs != 0) {
147 Perl_croak(aTHX_ "panic: sysopen with multiple args");
148 }
149 /* It's not always
150
151 O_RDONLY 0
152 O_WRONLY 1
153 O_RDWR 2
154
155 It might be (in OS/390 and Mac OS Classic it is)
156
157 O_WRONLY 1
158 O_RDONLY 2
159 O_RDWR 3
160
161 This means that simple & with O_RDWR would look
162 like O_RDONLY is present. Therefore we have to
163 be more careful.
164 */
165 if ((ismodifying = (rawmode & modifyingmode))) {
166 if ((ismodifying & O_WRONLY) == O_WRONLY ||
167 (ismodifying & O_RDWR) == O_RDWR ||
168 (ismodifying & (O_CREAT|appendtrunc)))
169 TAINT_PROPER("sysopen");
170 }
3b6c1aba 171 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
b931b1d9 172
09458382 173#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
b94c04ac 174 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
5ff3f7a4
GS
175#endif
176
06c7082d 177 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
ee518936 178
42d9b98d 179 namesv = sv_2mortal(newSVpv(oname,0));
ee518936
NIS
180 num_svs = 1;
181 svp = &namesv;
bd61b366 182 type = NULL;
b94c04ac 183 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
a687059c 184 }
c07a80fd 185 else {
b931b1d9 186 /* Regular (non-sys) open */
2fbb330f 187 char *name;
faecd977 188 STRLEN olen = len;
b931b1d9
NIS
189 char *tend;
190 int dodup = 0;
ecdeb87c 191 PerlIO *that_fp = NULL;
c07a80fd 192
2fbb330f 193 type = savepvn(oname, len);
b931b1d9 194 tend = type+len;
faecd977 195 SAVEFREEPV(type);
eb649f83
AMS
196
197 /* Lose leading and trailing white space */
eb649f83
AMS
198 for (; isSPACE(*type); type++) ;
199 while (tend > type && isSPACE(tend[-1]))
200 *--tend = '\0';
201
6170680b 202 if (num_svs) {
c2be40b1 203 /* New style explicit name, type is just mode and layer info */
9a869a14 204#ifdef USE_STDIO
2fbb330f 205 if (SvROK(*svp) && !strchr(oname,'&')) {
9a869a14
RGS
206 if (ckWARN(WARN_IO))
207 Perl_warner(aTHX_ packWARN(WARN_IO),
208 "Can't open a reference");
93189314 209 SETERRNO(EINVAL, LIB_INVARG);
9a869a14
RGS
210 goto say_false;
211 }
212#endif /* USE_STDIO */
705bfa5f 213 name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
faecd977 214 SAVEFREEPV(name);
6170680b 215 }
faecd977 216 else {
faecd977 217 name = type;
b931b1d9 218 len = tend-type;
faecd977 219 }
6170680b 220 IoTYPE(io) = *type;
516a5887 221 if ((*type == IoTYPE_RDWR) && /* scary */
01a8ea99 222 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
516a5887 223 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
c2be40b1 224 TAINT_PROPER("open");
6170680b 225 mode[1] = *type++;
c07a80fd 226 writing = 1;
a687059c 227 }
c07a80fd 228
9f37169a 229 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS
230 if (num_svs) {
231 if (type[1] != IoTYPE_STD) {
c2be40b1 232 unknown_open_mode:
b931b1d9
NIS
233 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
234 }
235 type++;
6170680b 236 }
b931b1d9 237 for (type++; isSPACE(*type); type++) ;
faecd977 238 if (!num_svs) {
6170680b 239 name = type;
b931b1d9 240 len = tend-type;
faecd977 241 }
4a7d1889
NIS
242 if (*name == '\0') {
243 /* command is missing 19990114 */
06eaf0bc 244 if (ckWARN(WARN_PIPE))
9014280d 245 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
246 errno = EPIPE;
247 goto say_false;
248 }
f27977c3 249 if (!(*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP
250 TAINT_ENV();
251 TAINT_PROPER("piped open");
b931b1d9 252 if (!num_svs && name[len-1] == '|') {
faecd977 253 name[--len] = '\0' ;
599cee73 254 if (ckWARN(WARN_PIPE))
9014280d 255 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 256 }
a1d180c4 257 mode[0] = 'w';
c07a80fd 258 writing = 1;
0c19750d
SP
259#ifdef HAS_STRLCAT
260 if (out_raw)
261 strlcat(mode, "b", PERL_MODE_MAX);
262 else if (out_crlf)
263 strlcat(mode, "t", PERL_MODE_MAX);
264#else
a1d180c4
NIS
265 if (out_raw)
266 strcat(mode, "b");
267 else if (out_crlf)
268 strcat(mode, "t");
0c19750d 269#endif
4a7d1889
NIS
270 if (num_svs > 1) {
271 fp = PerlProc_popen_list(mode, num_svs, svp);
272 }
273 else {
274 fp = PerlProc_popen(name,mode);
275 }
1771866f
NIS
276 if (num_svs) {
277 if (*type) {
278 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
279 goto say_false;
280 }
281 }
282 }
c2be40b1 283 } /* IoTYPE_PIPE */
9f37169a 284 else if (*type == IoTYPE_WRONLY) {
c07a80fd 285 TAINT_PROPER("open");
6170680b 286 type++;
9f37169a
JH
287 if (*type == IoTYPE_WRONLY) {
288 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 289 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 290 type++;
a0d0e21e 291 }
ee518936 292 else {
c07a80fd 293 mode[0] = 'w';
ee518936 294 }
c07a80fd
PP
295 writing = 1;
296
0c19750d
SP
297#ifdef HAS_STRLCAT
298 if (out_raw)
299 strlcat(mode, "b", PERL_MODE_MAX);
300 else if (out_crlf)
301 strlcat(mode, "t", PERL_MODE_MAX);
302#else
16fe6d59
GS
303 if (out_raw)
304 strcat(mode, "b");
305 else if (out_crlf)
306 strcat(mode, "t");
0c19750d 307#endif
6170680b 308 if (*type == '&') {
c07a80fd 309 duplicity:
ecdeb87c 310 dodup = PERLIO_DUP_FD;
e620cd72
NIS
311 type++;
312 if (*type == '=') {
c07a80fd 313 dodup = 0;
e620cd72 314 type++;
4a7d1889 315 }
ee518936 316 if (!num_svs && !*type && supplied_fp) {
4a7d1889 317 /* "<+&" etc. is used by typemaps */
c07a80fd 318 fp = supplied_fp;
ee518936 319 }
a0d0e21e 320 else {
e620cd72
NIS
321 if (num_svs > 1) {
322 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
323 }
54edfe98 324 for (; isSPACE(*type); type++) ;
1771866f 325 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 326 fd = SvUV(*svp);
24a7a40d 327 num_svs = 0;
ee518936 328 }
e620cd72 329 else if (isDIGIT(*type)) {
e620cd72
NIS
330 fd = atoi(type);
331 }
c07a80fd 332 else {
e1ec3a88 333 const IO* thatio;
e620cd72
NIS
334 if (num_svs) {
335 thatio = sv_2io(*svp);
336 }
337 else {
338 GV *thatgv;
b3d904f3 339 thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 340 0, SVt_PVIO);
e620cd72
NIS
341 thatio = GvIO(thatgv);
342 }
c07a80fd 343 if (!thatio) {
6e21c824 344#ifdef EINVAL
93189314 345 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 346#endif
c07a80fd
PP
347 goto say_false;
348 }
f4e789af 349 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
350 /* Flush stdio buffer before dup. --mjd
351 * Unfortunately SEEK_CURing 0 seems to
352 * be optimized away on most platforms;
353 * only Solaris and Linux seem to flush
354 * on that. --jhi */
2c534a3f
NC
355#ifdef USE_SFIO
356 /* sfio fails to clear error on next
357 sfwrite, contrary to documentation.
04d26ece 358 -- Nicholas Clark */
ecdeb87c
NIS
359 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
360 PerlIO_clearerr(that_fp);
2c534a3f 361#endif
7211d486
JH
362 /* On the other hand, do all platforms
363 * take gracefully to flushing a read-only
364 * filehandle? Perhaps we should do
365 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
366 PerlIO_flush(that_fp);
367 fd = PerlIO_fileno(that_fp);
0759c907
JH
368 /* When dup()ing STDIN, STDOUT or STDERR
369 * explicitly set appropriate access mode */
f4e789af
NC
370 if (that_fp == PerlIO_stdout()
371 || that_fp == PerlIO_stderr())
0759c907 372 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 373 else if (that_fp == PerlIO_stdin())
0759c907
JH
374 IoTYPE(io) = IoTYPE_RDONLY;
375 /* When dup()ing a socket, say result is
376 * one as well */
377 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 378 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
379 }
380 else
381 fd = -1;
a0d0e21e 382 }
ee518936 383 if (!num_svs)
bd61b366 384 type = NULL;
ecdeb87c
NIS
385 if (that_fp) {
386 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
387 }
388 else {
c07a80fd 389 if (dodup)
ecdeb87c
NIS
390 fd = PerlLIO_dup(fd);
391 else
392 was_fdopen = TRUE;
393 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 394 if (dodup && fd >= 0)
ecdeb87c
NIS
395 PerlLIO_close(fd);
396 }
faecd977 397 }
c07a80fd 398 }
ee518936 399 } /* & */
c07a80fd 400 else {
6170680b 401 for (; isSPACE(*type); type++) ;
b931b1d9 402 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 403 type++;
760ac839 404 fp = PerlIO_stdout();
50952442 405 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
406 if (num_svs > 1) {
407 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
408 }
c07a80fd
PP
409 }
410 else {
ee518936 411 if (!num_svs) {
2b2a7552 412 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
413 num_svs = 1;
414 svp = &namesv;
bd61b366 415 type = NULL;
ee518936 416 }
6e60e805 417 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 418 }
ee518936 419 } /* !& */
7e72d509
JH
420 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
421 goto unknown_open_mode;
c2be40b1 422 } /* IoTYPE_WRONLY */
9f37169a 423 else if (*type == IoTYPE_RDONLY) {
6170680b 424 for (type++; isSPACE(*type); type++) ;
bf38876a 425 mode[0] = 'r';
0c19750d
SP
426#ifdef HAS_STRLCAT
427 if (in_raw)
428 strlcat(mode, "b", PERL_MODE_MAX);
429 else if (in_crlf)
430 strlcat(mode, "t", PERL_MODE_MAX);
431#else
16fe6d59
GS
432 if (in_raw)
433 strcat(mode, "b");
434 else if (in_crlf)
435 strcat(mode, "t");
0c19750d 436#endif
6170680b 437 if (*type == '&') {
bf38876a 438 goto duplicity;
6170680b 439 }
b931b1d9 440 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 441 type++;
760ac839 442 fp = PerlIO_stdin();
50952442 443 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
444 if (num_svs > 1) {
445 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
446 }
a687059c 447 }
ee518936
NIS
448 else {
449 if (!num_svs) {
2b2a7552 450 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
451 num_svs = 1;
452 svp = &namesv;
bd61b366 453 type = NULL;
ee518936 454 }
6e60e805 455 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 456 }
7e72d509
JH
457 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
458 goto unknown_open_mode;
c2be40b1
JH
459 } /* IoTYPE_RDONLY */
460 else if ((num_svs && /* '-|...' or '...|' */
461 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 462 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 463 if (num_svs) {
b931b1d9 464 type += 2; /* skip over '-|' */
6170680b
IZ
465 }
466 else {
b931b1d9
NIS
467 *--tend = '\0';
468 while (tend > type && isSPACE(tend[-1]))
469 *--tend = '\0';
a6e20a40
AL
470 for (; isSPACE(*type); type++)
471 ;
6170680b 472 name = type;
b931b1d9 473 len = tend-type;
6170680b 474 }
4a7d1889
NIS
475 if (*name == '\0') {
476 /* command is missing 19990114 */
06eaf0bc 477 if (ckWARN(WARN_PIPE))
9014280d 478 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
479 errno = EPIPE;
480 goto say_false;
481 }
770526c1 482 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
483 TAINT_ENV();
484 TAINT_PROPER("piped open");
a1d180c4 485 mode[0] = 'r';
0c19750d
SP
486
487#ifdef HAS_STRLCAT
488 if (in_raw)
489 strlcat(mode, "b", PERL_MODE_MAX);
490 else if (in_crlf)
491 strlcat(mode, "t", PERL_MODE_MAX);
492#else
a1d180c4
NIS
493 if (in_raw)
494 strcat(mode, "b");
495 else if (in_crlf)
496 strcat(mode, "t");
0c19750d
SP
497#endif
498
4a7d1889
NIS
499 if (num_svs > 1) {
500 fp = PerlProc_popen_list(mode,num_svs,svp);
501 }
e620cd72 502 else {
4a7d1889
NIS
503 fp = PerlProc_popen(name,mode);
504 }
50952442 505 IoTYPE(io) = IoTYPE_PIPE;
1771866f
NIS
506 if (num_svs) {
507 for (; isSPACE(*type); type++) ;
508 if (*type) {
509 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
510 goto say_false;
511 }
512 }
513 }
a687059c 514 }
c2be40b1 515 else { /* layer(Args) */
6170680b 516 if (num_svs)
c2be40b1 517 goto unknown_open_mode;
6170680b 518 name = type;
50952442 519 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
520 for (; isSPACE(*name); name++)
521 ;
88b61e10 522 mode[0] = 'r';
0c19750d
SP
523
524#ifdef HAS_STRLCAT
525 if (in_raw)
526 strlcat(mode, "b", PERL_MODE_MAX);
527 else if (in_crlf)
528 strlcat(mode, "t", PERL_MODE_MAX);
529#else
88b61e10
NIS
530 if (in_raw)
531 strcat(mode, "b");
532 else if (in_crlf)
533 strcat(mode, "t");
0c19750d
SP
534#endif
535
770526c1 536 if (*name == '-' && name[1] == '\0') {
760ac839 537 fp = PerlIO_stdin();
50952442 538 IoTYPE(io) = IoTYPE_STD;
a687059c 539 }
16fe6d59 540 else {
ee518936 541 if (!num_svs) {
2b2a7552 542 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
543 num_svs = 1;
544 svp = &namesv;
bd61b366 545 type = NULL;
ee518936 546 }
6e60e805 547 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 548 }
a687059c
LW
549 }
550 }
bee1dbe2 551 if (!fp) {
ce44635a 552 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 553 && strchr(oname, '\n')
ce44635a 554
041457d9 555 )
9014280d 556 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 557 goto say_false;
bee1dbe2 558 }
a00b5bd3
NIS
559
560 if (ckWARN(WARN_IO)) {
561 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
562 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 563 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
564 "Filehandle STD%s reopened as %s only for input",
565 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
566 GvENAME(gv));
a00b5bd3 567 }
ee518936 568 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 569 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
570 "Filehandle STDIN reopened as %s only for output",
571 GvENAME(gv));
a00b5bd3
NIS
572 }
573 }
574
e99cca91 575 fd = PerlIO_fileno(fp);
e934609f
JH
576 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
577 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
578 * type probe for socket-ness.
579 */
580 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
581 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
582 /* If PerlIO claims to have fd we had better be able to fstat() it. */
583 (void) PerlIO_close(fp);
6e21c824 584 goto say_false;
a687059c 585 }
7114a2d2 586#ifndef PERL_MICRO
3280af22 587 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 588 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
589#ifdef HAS_SOCKET
590 else if (
c623bd54 591#ifdef S_IFMT
3280af22 592 !(PL_statbuf.st_mode & S_IFMT)
99b89507 593#else
b28d0864 594 !PL_statbuf.st_mode
99b89507 595#endif
0759c907
JH
596 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
597 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
598 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
599 char tmpbuf[256];
600 Sock_size_t buflen = sizeof tmpbuf;
601 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
602 || errno != ENOTSOCK)
603 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
604 /* but some return 0 for streams too, sigh */
99b89507 605 }
e99cca91 606#endif /* HAS_SOCKET */
7114a2d2 607#endif /* !PERL_MICRO */
a687059c 608 }
e99cca91
NIS
609
610 /* Eeek - FIXME !!!
611 * If this is a standard handle we discard all the layer stuff
612 * and just dup the fd into whatever was on the handle before !
613 */
614
6e21c824 615 if (saveifp) { /* must use old fp? */
f5b9d040 616 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 617 then dup the new fileno down
f5b9d040 618 */
6e21c824 619 if (saveofp) {
f5b9d040 620 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 621 if (saveofp != saveifp) { /* was a socket? */
760ac839 622 PerlIO_close(saveofp);
6e21c824
LW
623 }
624 }
6e60e805 625 if (savefd != fd) {
e934609f 626 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
627 is assigned to (say) STDOUT - for now let dup2() fail
628 and provide the error
629 */
bd4a5668
NIS
630 if (PerlLIO_dup2(fd, savefd) < 0) {
631 (void)PerlIO_close(fp);
632 goto say_false;
633 }
d082dcd6 634#ifdef VMS
6e60e805 635 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
636 char newname[FILENAME_MAX+1];
637 if (PerlIO_getname(fp, newname)) {
638 if (fd == PerlIO_fileno(PerlIO_stdout()))
639 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
640 if (fd == PerlIO_fileno(PerlIO_stderr()))
641 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
642 }
d082dcd6
JH
643 }
644#endif
d0e2cf63
AMS
645
646#if !defined(WIN32)
647 /* PL_fdpid isn't used on Windows, so avoid this useless work.
648 * XXX Probably the same for a lot of other places. */
649 {
650 Pid_t pid;
651 SV *sv;
652
653 LOCK_FDPID_MUTEX;
654 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 655 SvUPGRADE(sv, SVt_IV);
d0e2cf63 656 pid = SvIVX(sv);
45977657 657 SvIV_set(sv, 0);
d0e2cf63 658 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 659 SvUPGRADE(sv, SVt_IV);
45977657 660 SvIV_set(sv, pid);
d0e2cf63
AMS
661 UNLOCK_FDPID_MUTEX;
662 }
663#endif
664
e212fc47
AMS
665 if (was_fdopen) {
666 /* need to close fp without closing underlying fd */
667 int ofd = PerlIO_fileno(fp);
668 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
669#if defined(HAS_FCNTL) && defined(F_SETFD)
670 /* Assume if we have F_SETFD we have F_GETFD */
671 int coe = fcntl(ofd,F_GETFD);
672#endif
e212fc47
AMS
673 PerlIO_close(fp);
674 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
675#if defined(HAS_FCNTL) && defined(F_SETFD)
676 /* The dup trick has lost close-on-exec on ofd */
677 fcntl(ofd,F_SETFD, coe);
678#endif
e212fc47 679 PerlLIO_close(dupfd);
ecdeb87c 680 }
e212fc47
AMS
681 else
682 PerlIO_close(fp);
6e21c824
LW
683 }
684 fp = saveifp;
760ac839 685 PerlIO_clearerr(fp);
e99cca91 686 fd = PerlIO_fileno(fp);
6e21c824 687 }
a0d0e21e 688#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 689 if (fd >= 0) {
0bcc34c2 690 const int save_errno = errno;
a8710ca1
GS
691 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
692 errno = save_errno;
693 }
1462b684 694#endif
8990e307 695 IoIFP(io) = fp;
b931b1d9 696
684bef36 697 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 698 if (writing) {
50952442 699 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 700 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 701 char *s = mode;
3b6c1aba
JH
702 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
703 s++;
a33cf58c 704 *s = 'w';
1feb1812 705 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 706 PerlIO_close(fp);
4608196e 707 IoIFP(io) = NULL;
6e21c824 708 goto say_false;
fe14fcc3 709 }
1462b684
LW
710 }
711 else
8990e307 712 IoOFP(io) = fp;
bf38876a 713 }
a687059c 714 return TRUE;
6e21c824
LW
715
716say_false:
8990e307
LW
717 IoIFP(io) = saveifp;
718 IoOFP(io) = saveofp;
719 IoTYPE(io) = savetype;
6e21c824 720 return FALSE;
a687059c
LW
721}
722
760ac839 723PerlIO *
864dbfa3 724Perl_nextargv(pTHX_ register GV *gv)
a687059c 725{
97aff369 726 dVAR;
79072805 727 register SV *sv;
99b89507 728#ifndef FLEXFILENAMES
c623bd54
LW
729 int filedev;
730 int fileino;
99b89507 731#endif
761237fe
JB
732 Uid_t fileuid;
733 Gid_t filegid;
2d03de9c 734 IO * const io = GvIOp(gv);
fe14fcc3 735
3280af22 736 if (!PL_argvoutgv)
fafc274c 737 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
18708f5a
GS
738 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
739 IoFLAGS(io) &= ~IOf_START;
7a1c5554
GS
740 if (PL_inplace) {
741 if (!PL_argvout_stack)
742 PL_argvout_stack = newAV();
b37c2d43 743 av_push(PL_argvout_stack, SvREFCNT_inc_simple(PL_defoutgv));
7a1c5554 744 }
18708f5a 745 }
3280af22
NIS
746 if (PL_filemode & (S_ISUID|S_ISGID)) {
747 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 748#ifdef HAS_FCHMOD
c797f2d8
DM
749 if (PL_lastfd != -1)
750 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 751#else
b28d0864 752 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
753#endif
754 }
c797f2d8 755 PL_lastfd = -1;
3280af22 756 PL_filemode = 0;
5c501b37 757 if (!GvAV(gv))
4608196e 758 return NULL;
79072805 759 while (av_len(GvAV(gv)) >= 0) {
85aff577 760 STRLEN oldlen;
79072805 761 sv = av_shift(GvAV(gv));
8990e307 762 SAVEFREESV(sv);
e203899d 763 sv_setsv(GvSVn(gv),sv);
79072805 764 SvSETMAGIC(GvSV(gv));
3280af22 765 PL_oldname = SvPVx(GvSV(gv), oldlen);
4608196e 766 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
3280af22 767 if (PL_inplace) {
79072805 768 TAINT_PROPER("inplace open");
3280af22 769 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC
770 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
771 SVt_PVIO));
a0d0e21e 772 return IoIFP(GvIOp(gv));
c623bd54 773 }
99b89507 774#ifndef FLEXFILENAMES
b28d0864
NIS
775 filedev = PL_statbuf.st_dev;
776 fileino = PL_statbuf.st_ino;
99b89507 777#endif
3280af22
NIS
778 PL_filemode = PL_statbuf.st_mode;
779 fileuid = PL_statbuf.st_uid;
780 filegid = PL_statbuf.st_gid;
781 if (!S_ISREG(PL_filemode)) {
0453d815 782 if (ckWARN_d(WARN_INPLACE))
9014280d 783 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
784 "Can't do inplace edit: %s is not a regular file",
785 PL_oldname );
79072805 786 do_close(gv,FALSE);
c623bd54
LW
787 continue;
788 }
3280af22 789 if (*PL_inplace) {
2d03de9c 790 const char *star = strchr(PL_inplace, '*');
2d259d92 791 if (star) {
2d03de9c 792 const char *begin = PL_inplace;
2d259d92
CK
793 sv_setpvn(sv, "", 0);
794 do {
795 sv_catpvn(sv, begin, star - begin);
3280af22 796 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
797 begin = ++star;
798 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
799 if (*begin)
800 sv_catpv(sv,begin);
2d259d92
CK
801 }
802 else {
3280af22 803 sv_catpv(sv,PL_inplace);
2d259d92 804 }
c623bd54 805#ifndef FLEXFILENAMES
95a20fc0 806 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
807 && PL_statbuf.st_dev == filedev
808 && PL_statbuf.st_ino == fileino)
39e571d4 809#ifdef DJGPP
5f74f29c 810 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 811#endif
f248d071
GS
812 )
813 {
814 if (ckWARN_d(WARN_INPLACE))
9014280d 815 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
816 "Can't do inplace edit: %"SVf" would not be unique",
817 sv);
79072805 818 do_close(gv,FALSE);
c623bd54
LW
819 continue;
820 }
821#endif
fe14fcc3 822#ifdef HAS_RENAME
2585f9a3 823#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 824 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 825 if (ckWARN_d(WARN_INPLACE))
9014280d 826 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d 827 "Can't rename %s to %"SVf": %s, skipping file",
95b63a38 828 PL_oldname, (void*)sv, Strerror(errno));
79072805 829 do_close(gv,FALSE);
c623bd54
LW
830 continue;
831 }
a687059c 832#else
79072805 833 do_close(gv,FALSE);
95a20fc0
SP
834 (void)PerlLIO_unlink(SvPVX_const(sv));
835 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
93524f2b 836 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
4608196e 837 O_RDONLY,0,NULL);
55497cff 838#endif /* DOSISH */
ff8e2863 839#else
95a20fc0
SP
840 (void)UNLINK(SvPVX_const(sv));
841 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 842 if (ckWARN_d(WARN_INPLACE))
9014280d 843 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
844 "Can't rename %s to %"SVf": %s, skipping file",
845 PL_oldname, sv, Strerror(errno) );
79072805 846 do_close(gv,FALSE);
c623bd54
LW
847 continue;
848 }
b28d0864 849 (void)UNLINK(PL_oldname);
a687059c
LW
850#endif
851 }
852 else {
c030f24b 853#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 854# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 855 if (UNLINK(PL_oldname) < 0) {
0453d815 856 if (ckWARN_d(WARN_INPLACE))
9014280d 857 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
858 "Can't remove %s: %s, skipping file",
859 PL_oldname, Strerror(errno) );
79072805 860 do_close(gv,FALSE);
fe14fcc3
LW
861 continue;
862 }
edc7bc49 863# endif
ff8e2863 864#else
cea2e8a9 865 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 866#endif
a687059c
LW
867 }
868
3280af22
NIS
869 sv_setpvn(sv,">",!PL_inplace);
870 sv_catpvn(sv,PL_oldname,oldlen);
748a9306 871 SETERRNO(0,0); /* in case sprintf set errno */
4119ab01 872#ifdef VMS
93524f2b 873 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
4608196e 874 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,NULL))
4119ab01 875#else
93524f2b
NC
876 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
877 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
4608196e 878 NULL))
4119ab01 879#endif
18708f5a 880 {
0453d815 881 if (ckWARN_d(WARN_INPLACE))
9014280d 882 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
0453d815 883 PL_oldname, Strerror(errno) );
79072805 884 do_close(gv,FALSE);
fe14fcc3
LW
885 continue;
886 }
3280af22
NIS
887 setdefout(PL_argvoutgv);
888 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
889 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 890#ifdef HAS_FCHMOD
3280af22 891 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 892#else
3e3baf6d
TB
893# if !(defined(WIN32) && defined(__BORLANDC__))
894 /* Borland runtime creates a readonly file! */
b28d0864 895 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 896# endif
a687059c 897#endif
3280af22 898 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 899#ifdef HAS_FCHOWN
3280af22 900 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 901#else
fe14fcc3 902#ifdef HAS_CHOWN
b28d0864 903 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 904#endif
b1248f16 905#endif
fe14fcc3 906 }
a687059c 907 }
a0d0e21e 908 return IoIFP(GvIOp(gv));
a687059c 909 }
4d61ec05 910 else {
4d61ec05 911 if (ckWARN_d(WARN_INPLACE)) {
4373e329 912 const int eno = errno;
6af84f9f
GS
913 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
914 && !S_ISREG(PL_statbuf.st_mode))
915 {
9014280d 916 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
4d61ec05 917 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 918 PL_oldname);
6af84f9f 919 }
4d61ec05 920 else
9014280d 921 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
6af84f9f 922 PL_oldname, Strerror(eno));
4d61ec05
GS
923 }
924 }
a687059c 925 }
18708f5a
GS
926 if (io && (IoFLAGS(io) & IOf_ARGV))
927 IoFLAGS(io) |= IOf_START;
3280af22
NIS
928 if (PL_inplace) {
929 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
930 if (io && (IoFLAGS(io) & IOf_ARGV)
931 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
932 {
18708f5a
GS
933 GV *oldout = (GV*)av_pop(PL_argvout_stack);
934 setdefout(oldout);
935 SvREFCNT_dec(oldout);
4608196e 936 return NULL;
18708f5a 937 }
fafc274c 938 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 939 }
4608196e 940 return NULL;
a687059c
LW
941}
942
517844ec 943/* explicit renamed to avoid C++ conflict -- kja */
a687059c 944bool
864dbfa3 945Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 946{
97aff369 947 dVAR;
1193dd27
IZ
948 bool retval;
949 IO *io;
a687059c 950
79072805 951 if (!gv)
3280af22 952 gv = PL_argvgv;
a0d0e21e 953 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1d2dff63 954 if (not_implicit)
93189314 955 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 956 return FALSE;
99b89507 957 }
79072805
LW
958 io = GvIO(gv);
959 if (!io) { /* never opened */
1d2dff63 960 if (not_implicit) {
2dd78f96
JH
961 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
962 report_evil_fh(gv, io, PL_op->op_type);
93189314 963 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 964 }
a687059c
LW
965 return FALSE;
966 }
f2b5be74 967 retval = io_close(io, not_implicit);
517844ec 968 if (not_implicit) {
1193dd27
IZ
969 IoLINES(io) = 0;
970 IoPAGE(io) = 0;
971 IoLINES_LEFT(io) = IoPAGE_LEN(io);
972 }
50952442 973 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
974 return retval;
975}
976
977bool
f2b5be74 978Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27 979{
97aff369 980 dVAR;
1193dd27 981 bool retval = FALSE;
1193dd27 982
8990e307 983 if (IoIFP(io)) {
50952442 984 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 985 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 986 if (not_implicit) {
37038d91 987 STATUS_NATIVE_CHILD_SET(status);
e5218da5 988 retval = (STATUS_UNIX == 0);
f2b5be74
GS
989 }
990 else {
991 retval = (status != -1);
992 }
a687059c 993 }
50952442 994 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
995 retval = TRUE;
996 else {
8990e307 997 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 998 const bool prev_err = PerlIO_error(IoOFP(io));
e199e3be 999 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 1000 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 1001 }
e199e3be 1002 else {
0bcc34c2 1003 const bool prev_err = PerlIO_error(IoIFP(io));
e199e3be
RGS
1004 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1005 }
a687059c 1006 }
4608196e 1007 IoOFP(io) = IoIFP(io) = NULL;
79072805 1008 }
f2b5be74 1009 else if (not_implicit) {
93189314 1010 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 1011 }
1193dd27 1012
a687059c
LW
1013 return retval;
1014}
1015
1016bool
864dbfa3 1017Perl_do_eof(pTHX_ GV *gv)
a687059c 1018{
97aff369 1019 dVAR;
0bcc34c2 1020 register IO * const io = GvIO(gv);
a687059c 1021
79072805 1022 if (!io)
a687059c 1023 return TRUE;
041457d9 1024 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
06bcfee8 1025 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
a687059c 1026
8990e307 1027 while (IoIFP(io)) {
760ac839 1028 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1029 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1030 return FALSE; /* this is the most usual case */
1031 }
a687059c 1032
79852593
NC
1033 {
1034 /* getc and ungetc can stomp on errno */
1035 const int saverrno = errno;
1036 const int ch = PerlIO_getc(IoIFP(io));
1037 if (ch != EOF) {
1038 (void)PerlIO_ungetc(IoIFP(io),ch);
1039 errno = saverrno;
1040 return FALSE;
1041 }
505fdf5d 1042 errno = saverrno;
a687059c 1043 }
fab3f3a7 1044
760ac839 1045 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1046 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1047 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1048 }
533c011a 1049 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1050 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1051 return TRUE;
1052 }
1053 else
1054 return TRUE; /* normal fp, definitely end of file */
1055 }
1056 return TRUE;
1057}
1058
5ff3f7a4 1059Off_t
864dbfa3 1060Perl_do_tell(pTHX_ GV *gv)
a687059c 1061{
97aff369 1062 dVAR;
cbbf8932 1063 register IO *io = NULL;
96e4d5b1 1064 register PerlIO *fp;
a687059c 1065
96e4d5b1 1066 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1067#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1068 if (PerlIO_eof(fp))
1069 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1070#endif
8903cb82 1071 return PerlIO_tell(fp);
96e4d5b1 1072 }
411caa50
JH
1073 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1074 report_evil_fh(gv, io, PL_op->op_type);
93189314 1075 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1076 return (Off_t)-1;
a687059c
LW
1077}
1078
1079bool
864dbfa3 1080Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1081{
97aff369 1082 dVAR;
cbbf8932 1083 register IO *io = NULL;
137443ea 1084 register PerlIO *fp;
a687059c 1085
137443ea 1086 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1087#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1088 if (PerlIO_eof(fp))
1089 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1090#endif
8903cb82 1091 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1092 }
411caa50
JH
1093 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1094 report_evil_fh(gv, io, PL_op->op_type);
93189314 1095 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1096 return FALSE;
1097}
1098
97cc44eb 1099Off_t
864dbfa3 1100Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1101{
97aff369 1102 dVAR;
cbbf8932 1103 register IO *io = NULL;
8903cb82
PP
1104 register PerlIO *fp;
1105
1106 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
3028581b 1107 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
411caa50
JH
1108 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1109 report_evil_fh(gv, io, PL_op->op_type);
93189314 1110 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1111 return (Off_t)-1;
8903cb82
PP
1112}
1113
6ff81951 1114int
16fe6d59
GS
1115Perl_mode_from_discipline(pTHX_ SV *discp)
1116{
1117 int mode = O_BINARY;
1118 if (discp) {
1119 STRLEN len;
e62f0680 1120 const char *s = SvPV_const(discp,len);
16fe6d59
GS
1121 while (*s) {
1122 if (*s == ':') {
1123 switch (s[1]) {
1124 case 'r':
e963d6d2 1125 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1126 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1127 {
1128 mode = O_BINARY;
1129 s += 4;
1130 len -= 4;
1131 break;
1132 }
1133 /* FALL THROUGH */
1134 case 'c':
e963d6d2 1135 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1136 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1137 {
1138 mode = O_TEXT;
1139 s += 5;
1140 len -= 5;
1141 break;
1142 }
1143 /* FALL THROUGH */
1144 default:
1145 goto fail_discipline;
1146 }
1147 }
1148 else if (isSPACE(*s)) {
1149 ++s;
1150 --len;
1151 }
1152 else {
4373e329 1153 const char *end;
16fe6d59
GS
1154fail_discipline:
1155 end = strchr(s+1, ':');
1156 if (!end)
1157 end = s+len;
60382766 1158#ifndef PERLIO_LAYERS
363c40c4 1159 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1160#else
18a33fb5 1161 len -= end-s;
60382766
NIS
1162 s = end;
1163#endif
16fe6d59
GS
1164 }
1165 }
1166 }
1167 return mode;
1168}
1169
58e24eff 1170#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1171I32
1172my_chsize(int fd, Off_t length)
6eb13c3b 1173{
58e24eff
SH
1174#ifdef F_FREESP
1175 /* code courtesy of William Kucharski */
1176#define HAS_CHSIZE
1177
6eb13c3b 1178 struct flock fl;
c623ac67 1179 Stat_t filebuf;
6eb13c3b 1180
3028581b 1181 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1182 return -1;
1183
1184 if (filebuf.st_size < length) {
1185
1186 /* extend file length */
1187
3028581b 1188 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1189 return -1;
1190
1191 /* write a "0" byte */
1192
3028581b 1193 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1194 return -1;
1195 }
1196 else {
1197 /* truncate length */
1198
1199 fl.l_whence = 0;
1200 fl.l_len = 0;
1201 fl.l_start = length;
a0d0e21e 1202 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1203
1204 /*
a0d0e21e 1205 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1206 * fcntl(2), which truncates the file so that it ends at the
1207 * position indicated by fl.l_start.
1208 *
1209 * Will minor miracles never cease?
1210 */
1211
a0d0e21e 1212 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1213 return -1;
1214
1215 }
6eb13c3b 1216 return 0;
58e24eff 1217#else
27da23d5 1218 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1219#endif /* F_FREESP */
27da23d5 1220 return -1;
58e24eff
SH
1221}
1222#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1223
a687059c 1224bool
864dbfa3 1225Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1226{
97aff369 1227 dVAR;
e1ec3a88 1228 register const char *tmps;
463ee0b2 1229 STRLEN len;
676f44e7
NC
1230 U8 *tmpbuf = NULL;
1231 bool happy = TRUE;
a687059c 1232
79072805
LW
1233 /* assuming fp is checked earlier */
1234 if (!sv)
1235 return TRUE;
79072805
LW
1236 switch (SvTYPE(sv)) {
1237 case SVt_NULL:
411caa50 1238 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 1239 report_uninit(sv);
ff8e2863 1240 return TRUE;
79072805 1241 case SVt_IV:
a0d0e21e 1242 if (SvIOK(sv)) {
5b295bef 1243 SvGETMAGIC(sv);
cf2093f6 1244 if (SvIsUV(sv))
57def98f 1245 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
cf2093f6 1246 else
57def98f 1247 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
760ac839 1248 return !PerlIO_error(fp);
a0d0e21e
LW
1249 }
1250 /* FALL THROUGH */
79072805 1251 default:
676f44e7
NC
1252 /* Do this first to trigger any overloading. */
1253 tmps = SvPV_const(sv, len);
7d59b7e4 1254 if (PerlIO_isutf8(fp)) {
676f44e7
NC
1255 if (!SvUTF8(sv)) {
1256 /* We don't modify the original scalar. */
1257 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1258 tmps = (char *) tmpbuf;
1259 }
7d59b7e4 1260 }
ae798467 1261 else if (DO_UTF8(sv)) {
676f44e7
NC
1262 STRLEN tmplen = len;
1263 bool utf8 = TRUE;
1264 U8 *result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1265 if (!utf8) {
1266 tmpbuf = result;
1267 tmps = (char *) tmpbuf;
1268 len = tmplen;
1269 }
1270 else {
1271 assert((char *)result == tmps);
1272 if (ckWARN_d(WARN_UTF8)) {
1273 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1274 "Wide character in print");
1275 }
ae798467
NIS
1276 }
1277 }
79072805 1278 break;
ff8e2863 1279 }
94e4c244
JH
1280 /* To detect whether the process is about to overstep its
1281 * filesize limit we would need getrlimit(). We could then
1282 * also transparently raise the limit with setrlimit() --
1283 * but only until the system hard limit/the filesystem limit,
c5dd3cdd
JH
1284 * at which we would get EPERM. Note that when using buffered
1285 * io the write failure can be delayed until the flush/close. --jhi */
a21ac455 1286 if (len && (PerlIO_write(fp,tmps,len) == 0))
676f44e7
NC
1287 happy = FALSE;
1288 if (tmpbuf)
1289 Safefree(tmpbuf);
1290 return happy ? !PerlIO_error(fp) : FALSE;
a687059c
LW
1291}
1292
79072805 1293I32
cea2e8a9 1294Perl_my_stat(pTHX)
a687059c 1295{
97aff369 1296 dVAR;
39644a26 1297 dSP;
79072805 1298 IO *io;
2dd78f96 1299 GV* gv;
79072805 1300
533c011a 1301 if (PL_op->op_flags & OPf_REF) {
924508f0 1302 EXTEND(SP,1);
2dd78f96 1303 gv = cGVOP_gv;
748a9306 1304 do_fstat:
2dd78f96 1305 io = GvIO(gv);
8990e307 1306 if (io && IoIFP(io)) {
2dd78f96 1307 PL_statgv = gv;
c69006e4 1308 sv_setpvn(PL_statname,"", 0);
3280af22
NIS
1309 PL_laststype = OP_STAT;
1310 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
a687059c
LW
1311 }
1312 else {
2dd78f96 1313 if (gv == PL_defgv)
3280af22 1314 return PL_laststatval;
2dd78f96
JH
1315 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1316 report_evil_fh(gv, io, PL_op->op_type);
a0714e2c 1317 PL_statgv = NULL;
c69006e4 1318 sv_setpvn(PL_statname,"", 0);
3280af22 1319 return (PL_laststatval = -1);
a687059c
LW
1320 }
1321 }
fbb0b3b3
RGS
1322 else if (PL_op->op_private & OPpFT_STACKED) {
1323 return PL_laststatval;
1324 }
a687059c 1325 else {
0bcc34c2 1326 SV* const sv = POPs;
4373e329 1327 const char *s;
4ecd490c 1328 STRLEN len;
79072805 1329 PUTBACK;
748a9306 1330 if (SvTYPE(sv) == SVt_PVGV) {
2dd78f96 1331 gv = (GV*)sv;
748a9306
LW
1332 goto do_fstat;
1333 }
1334 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
2dd78f96 1335 gv = (GV*)SvRV(sv);
748a9306
LW
1336 goto do_fstat;
1337 }
1338
5c144d81 1339 s = SvPV_const(sv, len);
a0714e2c 1340 PL_statgv = NULL;
4ecd490c 1341 sv_setpvn(PL_statname, s, len);
95a20fc0 1342 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1343 PL_laststype = OP_STAT;
1344 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1345 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1346 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1347 return PL_laststatval;
a687059c
LW
1348 }
1349}
1350
fbb0b3b3 1351
79072805 1352I32
cea2e8a9 1353Perl_my_lstat(pTHX)
c623bd54 1354{
97aff369 1355 dVAR;
0bd48802 1356 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1357 dSP;
79072805 1358 SV *sv;
533c011a 1359 if (PL_op->op_flags & OPf_REF) {
924508f0 1360 EXTEND(SP,1);
638eceb6 1361 if (cGVOP_gv == PL_defgv) {
3280af22 1362 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1363 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1364 return PL_laststatval;
fe14fcc3 1365 }
5d3e98de 1366 if (ckWARN(WARN_IO)) {
9014280d 1367 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1368 GvENAME(cGVOP_gv));
1369 return (PL_laststatval = -1);
1370 }
fe14fcc3 1371 }
041457d9
DM
1372 else if (PL_laststype != OP_LSTAT
1373 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
fbb0b3b3 1374 Perl_croak(aTHX_ no_prev_lstat);
c623bd54 1375
3280af22 1376 PL_laststype = OP_LSTAT;
a0714e2c 1377 PL_statgv = NULL;
79072805
LW
1378 sv = POPs;
1379 PUTBACK;
5d3e98de 1380 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
9014280d 1381 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1382 GvENAME((GV*) SvRV(sv)));
1383 return (PL_laststatval = -1);
1384 }
4373e329 1385 /* XXX Do really need to be calling SvPV() all these times? */
e62f0680
NC
1386 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1387 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1388 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
9014280d 1389 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1390 return PL_laststatval;
c623bd54
LW
1391}
1392
d5a9bfb0 1393bool
2aa1486d
GS
1394Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1395 int fd, int do_report)
d5a9bfb0 1396{
27da23d5 1397 dVAR;
a0fd4948 1398#if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__)
cd39f2b6
JH
1399 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1400#else
79072805 1401 if (sp > mark) {
c3c5fad7 1402 char **a;
6136c704 1403 const char *tmps = NULL;
c3c5fad7
DM
1404 Newx(PL_Argv, sp - mark + 1, char*);
1405 a = PL_Argv;
890ce7af 1406
79072805
LW
1407 while (++mark <= sp) {
1408 if (*mark)
e62f0680 1409 *a++ = (char*)SvPV_nolen_const(*mark);
a687059c
LW
1410 else
1411 *a++ = "";
1412 }
6136c704 1413 *a = NULL;
91b2752f 1414 if (really)
e62f0680 1415 tmps = SvPV_nolen_const(really);
91b2752f
RG
1416 if ((!really && *PL_Argv[0] != '/') ||
1417 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1418 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1419 PERL_FPU_PRE_EXEC
91b2752f 1420 if (really && *tmps)
b4748376 1421 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1422 else
b4748376 1423 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1424 PERL_FPU_POST_EXEC
599cee73 1425 if (ckWARN(WARN_EXEC))
9014280d 1426 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
91b2752f 1427 (really ? tmps : PL_Argv[0]), Strerror(errno));
d5a9bfb0 1428 if (do_report) {
79852593 1429 const int e = errno;
d5a9bfb0
IZ
1430
1431 PerlLIO_write(fd, (void*)&e, sizeof(int));
1432 PerlLIO_close(fd);
1433 }
a687059c 1434 }
bee1dbe2 1435 do_execfree();
cd39f2b6 1436#endif
a687059c
LW
1437 return FALSE;
1438}
1439
fe14fcc3 1440void
864dbfa3 1441Perl_do_execfree(pTHX)
ff8e2863 1442{
97aff369 1443 dVAR;
43c5f42d 1444 Safefree(PL_Argv);
4608196e 1445 PL_Argv = NULL;
43c5f42d 1446 Safefree(PL_Cmd);
bd61b366 1447 PL_Cmd = NULL;
ff8e2863
LW
1448}
1449
9555a685 1450#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1451
1452bool
2fbb330f 1453Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1454{
27da23d5 1455 dVAR;
a687059c
LW
1456 register char **a;
1457 register char *s;
2fbb330f 1458 char *cmd;
2fbb330f
JM
1459
1460 /* Make a copy so we can change it */
0bcc34c2 1461 const int cmdlen = strlen(incmd);
2fbb330f
JM
1462 Newx(cmd, cmdlen+1, char);
1463 strncpy(cmd, incmd, cmdlen);
1464 cmd[cmdlen] = 0;
a687059c 1465
748a9306
LW
1466 while (*cmd && isSPACE(*cmd))
1467 cmd++;
1468
a687059c
LW
1469 /* save an extra exec if possible */
1470
bf38876a 1471#ifdef CSH
d05c1ba0 1472 {
0c19750d 1473 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1474 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1475 strnEQ(cmd+PL_cshlen," -c",3)) {
0c19750d
SP
1476#ifdef HAS_STRLCPY
1477 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1478#else
d05c1ba0 1479 strcpy(flags,"-c");
0c19750d 1480#endif
d05c1ba0
JH
1481 s = cmd+PL_cshlen+3;
1482 if (*s == 'f') {
1483 s++;
0c19750d
SP
1484#ifdef HAS_STRLCPY
1485 strlcat(flags, "f", PERL_FLAGS_MAX);
1486#else
d05c1ba0 1487 strcat(flags,"f");
0c19750d 1488#endif
d05c1ba0
JH
1489 }
1490 if (*s == ' ')
1491 s++;
1492 if (*s++ == '\'') {
0bcc34c2 1493 char * const ncmd = s;
d05c1ba0
JH
1494
1495 while (*s)
1496 s++;
1497 if (s[-1] == '\n')
1498 *--s = '\0';
1499 if (s[-1] == '\'') {
1500 *--s = '\0';
b35112e7 1501 PERL_FPU_PRE_EXEC
d05c1ba0 1502 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
b35112e7 1503 PERL_FPU_POST_EXEC
d05c1ba0 1504 *s = '\'';
2fbb330f 1505 Safefree(cmd);
d05c1ba0
JH
1506 return FALSE;
1507 }
1508 }
a687059c
LW
1509 }
1510 }
bf38876a 1511#endif /* CSH */
a687059c
LW
1512
1513 /* see if there are shell metacharacters in it */
1514
748a9306
LW
1515 if (*cmd == '.' && isSPACE(cmd[1]))
1516 goto doshell;
1517
1518 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1519 goto doshell;
1520
c170e444 1521 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
63f2c1e1
LW
1522 if (*s == '=')
1523 goto doshell;
748a9306 1524
a687059c 1525 for (s = cmd; *s; s++) {
d05c1ba0
JH
1526 if (*s != ' ' && !isALPHA(*s) &&
1527 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1528 if (*s == '\n' && !s[1]) {
1529 *s = '\0';
1530 break;
1531 }
603a98b0
IZ
1532 /* handle the 2>&1 construct at the end */
1533 if (*s == '>' && s[1] == '&' && s[2] == '1'
1534 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1535 && (!s[3] || isSPACE(s[3])))
1536 {
6867be6d 1537 const char *t = s + 3;
603a98b0
IZ
1538
1539 while (*t && isSPACE(*t))
1540 ++t;
943bbd07 1541 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1542 s[-2] = '\0';
1543 break;
1544 }
1545 }
a687059c 1546 doshell:
b35112e7 1547 PERL_FPU_PRE_EXEC
3280af22 1548 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
b35112e7 1549 PERL_FPU_POST_EXEC
2fbb330f 1550 Safefree(cmd);
a687059c
LW
1551 return FALSE;
1552 }
1553 }
748a9306 1554
a02a5408 1555 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
3280af22
NIS
1556 PL_Cmd = savepvn(cmd, s-cmd);
1557 a = PL_Argv;
1558 for (s = PL_Cmd; *s;) {
99b89507 1559 while (*s && isSPACE(*s)) s++;
a687059c
LW
1560 if (*s)
1561 *(a++) = s;
99b89507 1562 while (*s && !isSPACE(*s)) s++;
a687059c
LW
1563 if (*s)
1564 *s++ = '\0';
1565 }
6136c704 1566 *a = NULL;
3280af22 1567 if (PL_Argv[0]) {
b35112e7 1568 PERL_FPU_PRE_EXEC
3280af22 1569 PerlProc_execvp(PL_Argv[0],PL_Argv);
b35112e7 1570 PERL_FPU_POST_EXEC
b1248f16 1571 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1572 do_execfree();
a687059c 1573 goto doshell;
b1248f16 1574 }
6136c704
AL
1575 if (ckWARN(WARN_EXEC))
1576 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1577 PL_Argv[0], Strerror(errno));
1578 if (do_report) {
1579 const int e = errno;
1580 PerlLIO_write(fd, (const void*)&e, sizeof(int));
1581 PerlLIO_close(fd);
d008e5eb 1582 }
a687059c 1583 }
ff8e2863 1584 do_execfree();
2fbb330f 1585 Safefree(cmd);
a687059c
LW
1586 return FALSE;
1587}
1588
6890e559 1589#endif /* OS2 || WIN32 */
760ac839 1590
79072805 1591I32
864dbfa3 1592Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1593{
97aff369 1594 dVAR;
79072805 1595 register I32 val;
79072805 1596 register I32 tot = 0;
4634a855 1597 const char *const what = PL_op_name[type];
5c144d81 1598 const char *s;
890ce7af 1599 SV ** const oldmark = mark;
a687059c 1600
1444765e
NC
1601 /* Doing this ahead of the switch statement preserves the old behaviour,
1602 where attempting to use kill as a taint test test would fail on
1603 platforms where kill was not defined. */
1604#ifndef HAS_KILL
1605 if (type == OP_KILL)
4634a855 1606 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1607#endif
1608#ifndef HAS_CHOWN
1609 if (type == OP_CHOWN)
4634a855 1610 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1611#endif
1612
1613
20408e3c 1614#define APPLY_TAINT_PROPER() \
3280af22 1615 STMT_START { \
17406bd6 1616 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1617 } STMT_END
20408e3c
GS
1618
1619 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1620 if (PL_tainting) {
463ee0b2 1621 while (++mark <= sp) {
bbce6d69
PP
1622 if (SvTAINTED(*mark)) {
1623 TAINT;
1624 break;
1625 }
463ee0b2
LW
1626 }
1627 mark = oldmark;
1628 }
a687059c 1629 switch (type) {
79072805 1630 case OP_CHMOD:
20408e3c 1631 APPLY_TAINT_PROPER();
79072805 1632 if (++mark <= sp) {
463ee0b2 1633 val = SvIVx(*mark);
20408e3c
GS
1634 APPLY_TAINT_PROPER();
1635 tot = sp - mark;
79072805 1636 while (++mark <= sp) {
c4aca7d0
GA
1637 GV* gv;
1638 if (SvTYPE(*mark) == SVt_PVGV) {
1639 gv = (GV*)*mark;
1640 do_fchmod:
1641 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1642#ifdef HAS_FCHMOD
1643 APPLY_TAINT_PROPER();
1644 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1645 tot--;
1646#else
b9c6780e 1647 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1648#endif
1649 }
1650 else {
1651 tot--;
1652 }
1653 }
1654 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1655 gv = (GV*)SvRV(*mark);
1656 goto do_fchmod;
1657 }
1658 else {
1659 const char *name = SvPV_nolen_const(*mark);
1660 APPLY_TAINT_PROPER();
1661 if (PerlLIO_chmod(name, val))
1662 tot--;
1663 }
a687059c
LW
1664 }
1665 }
1666 break;
fe14fcc3 1667#ifdef HAS_CHOWN
79072805 1668 case OP_CHOWN:
20408e3c 1669 APPLY_TAINT_PROPER();
79072805 1670 if (sp - mark > 2) {
6867be6d 1671 register I32 val2;
463ee0b2
LW
1672 val = SvIVx(*++mark);
1673 val2 = SvIVx(*++mark);
20408e3c 1674 APPLY_TAINT_PROPER();
a0d0e21e 1675 tot = sp - mark;
79072805 1676 while (++mark <= sp) {
c4aca7d0
GA
1677 GV* gv;
1678 if (SvTYPE(*mark) == SVt_PVGV) {
1679 gv = (GV*)*mark;
1680 do_fchown:
1681 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1682#ifdef HAS_FCHOWN
1683 APPLY_TAINT_PROPER();
1684 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1685 tot--;
1686#else
b9c6780e 1687 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1688#endif
1689 }
1690 else {
1691 tot--;
1692 }
1693 }
1694 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1695 gv = (GV*)SvRV(*mark);
1696 goto do_fchown;
1697 }
1698 else {
1699 const char *name = SvPV_nolen_const(*mark);
1700 APPLY_TAINT_PROPER();
1701 if (PerlLIO_chown(name, val, val2))
1702 tot--;
1703 }
a687059c
LW
1704 }
1705 }
1706 break;
b1248f16 1707#endif
a1d180c4 1708/*
dd64f1c3
AD
1709XXX Should we make lchown() directly available from perl?
1710For now, we'll let Configure test for HAS_LCHOWN, but do
1711nothing in the core.
1712 --AD 5/1998
1713*/
fe14fcc3 1714#ifdef HAS_KILL
79072805 1715 case OP_KILL:
20408e3c 1716 APPLY_TAINT_PROPER();
55497cff
PP
1717 if (mark == sp)
1718 break;
e62f0680 1719 s = SvPVx_nolen_const(*++mark);
e02bfb16 1720 if (isALPHA(*s)) {
79072805
LW
1721 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1722 s += 3;
e02bfb16 1723 if ((val = whichsig(s)) < 0)
cea2e8a9 1724 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1725 }
1726 else
463ee0b2 1727 val = SvIVx(*mark);
20408e3c
GS
1728 APPLY_TAINT_PROPER();
1729 tot = sp - mark;
3595fcef
PP
1730#ifdef VMS
1731 /* kill() doesn't do process groups (job trees?) under VMS */
1732 if (val < 0) val = -val;
1733 if (val == SIGKILL) {
1734# include <starlet.h>
1735 /* Use native sys$delprc() to insure that target process is
1736 * deleted; supervisor-mode images don't pay attention to
1737 * CRTL's emulation of Unix-style signals and kill()
1738 */
1739 while (++mark <= sp) {
1740 I32 proc = SvIVx(*mark);
1741 register unsigned long int __vmssts;
20408e3c 1742 APPLY_TAINT_PROPER();
3595fcef
PP
1743 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1744 tot--;
1745 switch (__vmssts) {
1746 case SS$_NONEXPR:
1747 case SS$_NOSUCHNODE:
1748 SETERRNO(ESRCH,__vmssts);
1749 break;
1750 case SS$_NOPRIV:
1751 SETERRNO(EPERM,__vmssts);
1752 break;
1753 default:
1754 SETERRNO(EVMSERR,__vmssts);
1755 }
1756 }
1757 }
1758 break;
1759 }
1760#endif
79072805
LW
1761 if (val < 0) {
1762 val = -val;
1763 while (++mark <= sp) {
0bcc34c2 1764 const I32 proc = SvIVx(*mark);
20408e3c 1765 APPLY_TAINT_PROPER();
fe14fcc3 1766#ifdef HAS_KILLPG
3028581b 1767 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1768#else
3028581b 1769 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1770#endif
79072805 1771 tot--;
a687059c 1772 }
79072805
LW
1773 }
1774 else {
1775 while (++mark <= sp) {
0bcc34c2 1776 const I32 proc = SvIVx(*mark);
20408e3c
GS
1777 APPLY_TAINT_PROPER();
1778 if (PerlProc_kill(proc, val))
79072805 1779 tot--;
a687059c
LW
1780 }
1781 }
1782 break;
b1248f16 1783#endif
79072805 1784 case OP_UNLINK:
20408e3c 1785 APPLY_TAINT_PROPER();
79072805
LW
1786 tot = sp - mark;
1787 while (++mark <= sp) {
e62f0680 1788 s = SvPV_nolen_const(*mark);
20408e3c 1789 APPLY_TAINT_PROPER();
3280af22 1790 if (PL_euid || PL_unsafe) {
b8ffc8df 1791 if (UNLINK(s))
a687059c
LW
1792 tot--;
1793 }
1794 else { /* don't let root wipe out directories without -U */
3280af22 1795 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1796 tot--;
1797 else {
b8ffc8df 1798 if (UNLINK(s))
a687059c
LW
1799 tot--;
1800 }
1801 }
1802 }
1803 break;
e96b369d 1804#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1805 case OP_UTIME:
20408e3c 1806 APPLY_TAINT_PROPER();
79072805 1807 if (sp - mark > 2) {
e96b369d
GA
1808#if defined(HAS_FUTIMES)
1809 struct timeval utbuf[2];
1810 void *utbufp = utbuf;
1811#elif defined(I_UTIME) || defined(VMS)
663a0e37 1812 struct utimbuf utbuf;
07409e01 1813 struct utimbuf *utbufp = &utbuf;
663a0e37 1814#else
a687059c 1815 struct {
dd2821f6
GS
1816 Time_t actime;
1817 Time_t modtime;
a687059c 1818 } utbuf;
07409e01 1819 void *utbufp = &utbuf;
663a0e37 1820#endif
a687059c 1821
0bcc34c2
AL
1822 SV* const accessed = *++mark;
1823 SV* const modified = *++mark;
c6f7b413 1824
6ec06612
SB
1825 /* Be like C, and if both times are undefined, let the C
1826 * library figure out what to do. This usually means
1827 * "current time". */
c6f7b413
RS
1828
1829 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1830 utbufp = NULL;
1831 else {
1832 Zero(&utbuf, sizeof utbuf, char);
e96b369d
GA
1833#ifdef HAS_FUTIMES
1834 utbuf[0].tv_sec = (long)SvIVx(accessed); /* time accessed */
1835 utbuf[0].tv_usec = 0;
1836 utbuf[1].tv_sec = (long)SvIVx(modified); /* time modified */
1837 utbuf[1].tv_usec = 0;
1838#elif defined(BIG_TIME)
6ec06612
SB
1839 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1840 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
517844ec 1841#else
6ec06612
SB
1842 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1843 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
517844ec 1844#endif
6ec06612 1845 }
4373e329 1846 APPLY_TAINT_PROPER();
79072805
LW
1847 tot = sp - mark;
1848 while (++mark <= sp) {
e96b369d
GA
1849 GV* gv;
1850 if (SvTYPE(*mark) == SVt_PVGV) {
1851 gv = (GV*)*mark;
1852 do_futimes:
1853 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1854#ifdef HAS_FUTIMES
1855 APPLY_TAINT_PROPER();
1856 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), utbufp))
1857 tot--;
1858#else
1859 Perl_die(aTHX_ PL_no_func, "futimes");
1860#endif
1861 }
1862 else {
1863 tot--;
1864 }
1865 }
1866 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1867 gv = (GV*)SvRV(*mark);
1868 goto do_futimes;
1869 }
1870 else {
0bcc34c2 1871 const char * const name = SvPV_nolen_const(*mark);
e96b369d
GA
1872 APPLY_TAINT_PROPER();
1873#ifdef HAS_FUTIMES
1874 if (utimes(name, utbufp))
1875#else
1876 if (PerlLIO_utime(name, utbufp))
1877#endif
1878 tot--;
1879 }
1880
a687059c 1881 }
a687059c
LW
1882 }
1883 else
79072805 1884 tot = 0;
a687059c 1885 break;
a0d0e21e 1886#endif
a687059c
LW
1887 }
1888 return tot;
20408e3c 1889
20408e3c 1890#undef APPLY_TAINT_PROPER
a687059c
LW
1891}
1892
1893/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1894#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1895bool
ae1951c1
NC
1896Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1897/* effective is a flag, true for EUID, or for checking if the effective gid
1898 * is in the list of groups returned from getgroups().
1899 */
a687059c 1900{
97aff369 1901 dVAR;
bee1dbe2 1902#ifdef DOSISH
fe14fcc3
LW
1903 /* [Comments and code from Len Reed]
1904 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1905 * to write-protected files. The execute permission bit is set
1906 * by the Miscrosoft C library stat() function for the following:
1907 * .exe files
1908 * .com files
1909 * .bat files
1910 * directories
1911 * All files and directories are readable.
1912 * Directories and special files, e.g. "CON", cannot be
1913 * write-protected.
1914 * [Comment by Tom Dinger -- a directory can have the write-protect
1915 * bit set in the file system, but DOS permits changes to
1916 * the directory anyway. In addition, all bets are off
1917 * here for networked software, such as Novell and
1918 * Sun's PC-NFS.]
1919 */
1920
bee1dbe2
LW
1921 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1922 * too so it will actually look into the files for magic numbers
1923 */
7f4774ae 1924 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1925
55497cff 1926#else /* ! DOSISH */
3280af22 1927 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
7f4774ae 1928 if (mode == S_IXUSR) {
c623bd54 1929 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1930 return TRUE;
1931 }
1932 else
1933 return TRUE; /* root reads and writes anything */
1934 return FALSE;
1935 }
3280af22 1936 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
7f4774ae 1937 if (statbufp->st_mode & mode)
a687059c
LW
1938 return TRUE; /* ok as "user" */
1939 }
d8eceb89 1940 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 1941 if (statbufp->st_mode & mode >> 3)
a687059c
LW
1942 return TRUE; /* ok as "group" */
1943 }
7f4774ae 1944 else if (statbufp->st_mode & mode >> 6)
a687059c
LW
1945 return TRUE; /* ok as "other" */
1946 return FALSE;
55497cff 1947#endif /* ! DOSISH */
a687059c 1948}
a0d0e21e 1949#endif /* ! VMS */
a687059c 1950
d8eceb89 1951bool
ae1951c1 1952Perl_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 1953{
cd39f2b6
JH
1954#ifdef MACOS_TRADITIONAL
1955 /* This is simply not correct for AppleShare, but fix it yerself. */
1956 return TRUE;
1957#else
97aff369 1958 dVAR;
3280af22 1959 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1960 return TRUE;
fe14fcc3 1961#ifdef HAS_GETGROUPS
a687059c 1962 {
331b57bc 1963 Groups_t *gary = NULL;
79072805 1964 I32 anum;
331b57bc 1965 bool rc = FALSE;
a687059c 1966
331b57bc
SP
1967 anum = getgroups(0, gary);
1968 Newx(gary, anum, Groups_t);
1969 anum = getgroups(anum, gary);
a687059c 1970 while (--anum >= 0)
331b57bc
SP
1971 if (gary[anum] == testgid) {
1972 rc = TRUE;
1973 break;
1974 }
1975
1976 Safefree(gary);
1977 return rc;
a687059c 1978 }
c685562b 1979#else
a687059c 1980 return FALSE;
cd39f2b6 1981#endif
c685562b 1982#endif
a687059c 1983}
c2ab57d4 1984
fe14fcc3 1985#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1986
79072805 1987I32
864dbfa3 1988Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1989{
97aff369 1990 dVAR;
0bcc34c2 1991 const key_t key = (key_t)SvNVx(*++mark);
6867be6d
AL
1992 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1993 const I32 flags = SvIVx(*++mark);
294a48e9
AL
1994
1995 PERL_UNUSED_ARG(sp);
c2ab57d4 1996
748a9306 1997 SETERRNO(0,0);
c2ab57d4
LW
1998 switch (optype)
1999 {
fe14fcc3 2000#ifdef HAS_MSG
79072805 2001 case OP_MSGGET:
c2ab57d4 2002 return msgget(key, flags);
e5d73d77 2003#endif
fe14fcc3 2004#ifdef HAS_SEM
79072805 2005 case OP_SEMGET:
c2ab57d4 2006 return semget(key, n, flags);
e5d73d77 2007#endif
fe14fcc3 2008#ifdef HAS_SHM
79072805 2009 case OP_SHMGET:
c2ab57d4 2010 return shmget(key, n, flags);
e5d73d77 2011#endif
fe14fcc3 2012#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2013 default:
cea2e8a9 2014 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2015#endif
c2ab57d4
LW
2016 }
2017 return -1; /* should never happen */
2018}
2019
79072805 2020I32
864dbfa3 2021Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2022{
97aff369 2023 dVAR;
c2ab57d4 2024 char *a;
a0d0e21e 2025 I32 ret = -1;
6867be6d 2026 const I32 id = SvIVx(*++mark);
95b63a38 2027#ifdef Semctl
6867be6d 2028 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2029#endif
6867be6d 2030 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
2031 SV * const astr = *++mark;
2032 STRLEN infosize = 0;
2033 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2034
0bcc34c2 2035 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
2036
2037 switch (optype)
2038 {
fe14fcc3 2039#ifdef HAS_MSG
79072805 2040 case OP_MSGCTL:
c2ab57d4
LW
2041 if (cmd == IPC_STAT || cmd == IPC_SET)
2042 infosize = sizeof(struct msqid_ds);
2043 break;
e5d73d77 2044#endif
fe14fcc3 2045#ifdef HAS_SHM
79072805 2046 case OP_SHMCTL:
c2ab57d4
LW
2047 if (cmd == IPC_STAT || cmd == IPC_SET)
2048 infosize = sizeof(struct shmid_ds);
2049 break;
e5d73d77 2050#endif
fe14fcc3 2051#ifdef HAS_SEM
79072805 2052 case OP_SEMCTL:
39398f3f 2053#ifdef Semctl
c2ab57d4
LW
2054 if (cmd == IPC_STAT || cmd == IPC_SET)
2055 infosize = sizeof(struct semid_ds);
2056 else if (cmd == GETALL || cmd == SETALL)
2057 {
8e591e46 2058 struct semid_ds semds;
bd89102f 2059 union semun semun;
e6f0bdd6
GS
2060#ifdef EXTRA_F_IN_SEMUN_BUF
2061 semun.buff = &semds;
2062#else
84902520 2063 semun.buf = &semds;
e6f0bdd6 2064#endif
c2ab57d4 2065 getinfo = (cmd == GETALL);
9b89d93d
GB
2066 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2067 return -1;
6e21c824
LW
2068 infosize = semds.sem_nsems * sizeof(short);
2069 /* "short" is technically wrong but much more portable
2070 than guessing about u_?short(_t)? */
c2ab57d4 2071 }
39398f3f 2072#else
cea2e8a9 2073 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2074#endif
c2ab57d4 2075 break;
e5d73d77 2076#endif
fe14fcc3 2077#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2078 default:
cea2e8a9 2079 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2080#endif
c2ab57d4
LW
2081 }
2082
2083 if (infosize)
2084 {
2085 if (getinfo)
2086 {
93524f2b 2087 SvPV_force_nolen(astr);
a0d0e21e 2088 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
2089 }
2090 else
2091 {
93524f2b 2092 STRLEN len;
463ee0b2
LW
2093 a = SvPV(astr, len);
2094 if (len != infosize)
cea2e8a9 2095 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
2096 PL_op_desc[optype],
2097 (unsigned long)len,
2098 (long)infosize);
c2ab57d4
LW
2099 }
2100 }
2101 else
2102 {
0bcc34c2 2103 const IV i = SvIV(astr);
56431972 2104 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2105 }
748a9306 2106 SETERRNO(0,0);
c2ab57d4
LW
2107 switch (optype)
2108 {
fe14fcc3 2109#ifdef HAS_MSG
79072805 2110 case OP_MSGCTL:
bee1dbe2 2111 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2112 break;
e5d73d77 2113#endif
fe14fcc3 2114#ifdef HAS_SEM
bd89102f 2115 case OP_SEMCTL: {
39398f3f 2116#ifdef Semctl
bd89102f
AD
2117 union semun unsemds;
2118
e6f0bdd6
GS
2119#ifdef EXTRA_F_IN_SEMUN_BUF
2120 unsemds.buff = (struct semid_ds *)a;
2121#else
bd89102f 2122 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2123#endif
bd89102f 2124 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2125#else
cea2e8a9 2126 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2127#endif
bd89102f 2128 }
c2ab57d4 2129 break;
e5d73d77 2130#endif
fe14fcc3 2131#ifdef HAS_SHM
79072805 2132 case OP_SHMCTL:
bee1dbe2 2133 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2134 break;
e5d73d77 2135#endif
c2ab57d4
LW
2136 }
2137 if (getinfo && ret >= 0) {
79072805
LW
2138 SvCUR_set(astr, infosize);
2139 *SvEND(astr) = '\0';
a0d0e21e 2140 SvSETMAGIC(astr);
c2ab57d4
LW
2141 }
2142 return ret;
2143}
2144
79072805 2145I32
864dbfa3 2146Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2147{
97aff369 2148 dVAR;
fe14fcc3 2149#ifdef HAS_MSG
463ee0b2 2150 STRLEN len;
6867be6d 2151 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2152 SV * const mstr = *++mark;
2153 const I32 flags = SvIVx(*++mark);
2154 const char * const mbuf = SvPV_const(mstr, len);
2155 const I32 msize = len - sizeof(long);
2156
890ce7af 2157 PERL_UNUSED_ARG(sp);
c2ab57d4 2158
0bcc34c2 2159 if (msize < 0)
cea2e8a9 2160 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2161 SETERRNO(0,0);
bee1dbe2 2162 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2163#else
cea2e8a9 2164 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2165#endif
c2ab57d4
LW
2166}
2167
79072805 2168I32
864dbfa3 2169Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2170{
fe14fcc3 2171#ifdef HAS_MSG
97aff369 2172 dVAR;
c2ab57d4
LW
2173 char *mbuf;
2174 long mtype;
6867be6d 2175 I32 msize, flags, ret;
6867be6d 2176 const I32 id = SvIVx(*++mark);
0bcc34c2 2177 SV * const mstr = *++mark;
890ce7af 2178 PERL_UNUSED_ARG(sp);
79072805 2179
c2e66d9e
GS
2180 /* suppress warning when reading into undef var --jhi */
2181 if (! SvOK(mstr))
2182 sv_setpvn(mstr, "", 0);
463ee0b2
LW
2183 msize = SvIVx(*++mark);
2184 mtype = (long)SvIVx(*++mark);
2185 flags = SvIVx(*++mark);
93524f2b 2186 SvPV_force_nolen(mstr);
a0d0e21e 2187 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2188
748a9306 2189 SETERRNO(0,0);
bee1dbe2 2190 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2191 if (ret >= 0) {
79072805
LW
2192 SvCUR_set(mstr, sizeof(long)+ret);
2193 *SvEND(mstr) = '\0';
41d6edb2
JH
2194#ifndef INCOMPLETE_TAINTS
2195 /* who knows who has been playing with this message? */
2196 SvTAINTED_on(mstr);
2197#endif
c2ab57d4
LW
2198 }
2199 return ret;
e5d73d77 2200#else
cea2e8a9 2201 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2202#endif
c2ab57d4
LW
2203}
2204
79072805 2205I32
864dbfa3 2206Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2207{
fe14fcc3 2208#ifdef HAS_SEM
97aff369 2209 dVAR;
463ee0b2 2210 STRLEN opsize;
6867be6d 2211 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2212 SV * const opstr = *++mark;
2213 const char * const opbuf = SvPV_const(opstr, opsize);
890ce7af 2214 PERL_UNUSED_ARG(sp);
c2ab57d4 2215
248ff010
NC
2216 if (opsize < 3 * SHORTSIZE
2217 || (opsize % (3 * SHORTSIZE))) {
93189314 2218 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2219 return -1;
2220 }
748a9306 2221 SETERRNO(0,0);
248ff010
NC
2222 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2223 {
6867be6d 2224 const int nsops = opsize / (3 * sizeof (short));
248ff010 2225 int i = nsops;
0bcc34c2 2226 short * const ops = (short *) opbuf;
248ff010
NC
2227 short *o = ops;
2228 struct sembuf *temps, *t;
2229 I32 result;
2230
a02a5408 2231 Newx (temps, nsops, struct sembuf);
248ff010
NC
2232 t = temps;
2233 while (i--) {
2234 t->sem_num = *o++;
2235 t->sem_op = *o++;
2236 t->sem_flg = *o++;
2237 t++;
2238 }
2239 result = semop(id, temps, nsops);
2240 t = temps;
2241 o = ops;
2242 i = nsops;
2243 while (i--) {
2244 *o++ = t->sem_num;
2245 *o++ = t->sem_op;
2246 *o++ = t->sem_flg;
2247 t++;
2248 }
2249 Safefree(temps);
2250 return result;
2251 }
e5d73d77 2252#else
cea2e8a9 2253 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2254#endif
c2ab57d4
LW
2255}
2256
79072805 2257I32
864dbfa3 2258Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2259{
fe14fcc3 2260#ifdef HAS_SHM
97aff369 2261 dVAR;
4373e329 2262 char *shm;
c2ab57d4 2263 struct shmid_ds shmds;
6867be6d 2264 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2265 SV * const mstr = *++mark;
2266 const I32 mpos = SvIVx(*++mark);
2267 const I32 msize = SvIVx(*++mark);
890ce7af 2268 PERL_UNUSED_ARG(sp);
c2ab57d4 2269
748a9306 2270 SETERRNO(0,0);
c2ab57d4
LW
2271 if (shmctl(id, IPC_STAT, &shmds) == -1)
2272 return -1;
bb7a0f54 2273 if (mpos < 0 || msize < 0 || (size_t)mpos + msize > shmds.shm_segsz) {
93189314 2274 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2275 return -1;
2276 }
d4c19fe8 2277 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2278 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2279 return -1;
79072805 2280 if (optype == OP_SHMREAD) {
4373e329 2281 const char *mbuf;
9f538c04
GS
2282 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2283 if (! SvOK(mstr))
2284 sv_setpvn(mstr, "", 0);
93524f2b 2285 SvPV_force_nolen(mstr);
bb7a0f54 2286 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2287
bee1dbe2 2288 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2289 SvCUR_set(mstr, msize);
2290 *SvEND(mstr) = '\0';
a0d0e21e 2291 SvSETMAGIC(mstr);
d929ce6f
JH
2292#ifndef INCOMPLETE_TAINTS
2293 /* who knows who has been playing with this shared memory? */
2294 SvTAINTED_on(mstr);
2295#endif
c2ab57d4
LW
2296 }
2297 else {
79072805 2298 I32 n;
93524f2b 2299 STRLEN len;
c2ab57d4 2300
93524f2b 2301 const char *mbuf = SvPV_const(mstr, len);
463ee0b2 2302 if ((n = len) > msize)
c2ab57d4 2303 n = msize;
bee1dbe2 2304 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2305 if (n < msize)
bee1dbe2 2306 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2307 }
2308 return shmdt(shm);
e5d73d77 2309#else
cea2e8a9 2310 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2311#endif
c2ab57d4
LW
2312}
2313
fe14fcc3 2314#endif /* SYSV IPC */
4e35701f 2315
0d44d22b 2316/*
ccfc67b7
JH
2317=head1 IO Functions
2318
0d44d22b
NC
2319=for apidoc start_glob
2320
2321Function called by C<do_readline> to spawn a glob (or do the glob inside
2322perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2323this glob starter is only used by miniperl during the build process.
0d44d22b 2324Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2325
0d44d22b
NC
2326=cut
2327*/
2328
2329PerlIO *
2330Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2331{
27da23d5 2332 dVAR;
561b68a9 2333 SV * const tmpcmd = newSV(0);
0d44d22b
NC
2334 PerlIO *fp;
2335 ENTER;
2336 SAVEFREESV(tmpcmd);
2337#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2338 /* since spawning off a process is a real performance hit */
dca5a913
JM
2339
2340PerlIO *
2341Perl_vms_start_glob
2342 (pTHX_ SV *tmpglob,
2343 IO *io);
2344
49a7a762 2345 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2346
0d44d22b
NC
2347#else /* !VMS */
2348#ifdef MACOS_TRADITIONAL
2349 sv_setpv(tmpcmd, "glob ");
2350 sv_catsv(tmpcmd, tmpglob);
2351 sv_catpv(tmpcmd, " |");
2352#else
2353#ifdef DOSISH
2354#ifdef OS2
2355 sv_setpv(tmpcmd, "for a in ");
2356 sv_catsv(tmpcmd, tmpglob);
2357 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2358#else
2359#ifdef DJGPP
2360 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2361 sv_catsv(tmpcmd, tmpglob);
2362#else
2363 sv_setpv(tmpcmd, "perlglob ");
2364 sv_catsv(tmpcmd, tmpglob);
2365 sv_catpv(tmpcmd, " |");
2366#endif /* !DJGPP */
2367#endif /* !OS2 */
2368#else /* !DOSISH */
2369#if defined(CSH)
2370 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2371 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2372 sv_catsv(tmpcmd, tmpglob);
2373 sv_catpv(tmpcmd, "' 2>/dev/null |");
2374#else
2375 sv_setpv(tmpcmd, "echo ");
2376 sv_catsv(tmpcmd, tmpglob);
2377#if 'z' - 'a' == 25
2378 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2379#else
2380 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2381#endif
2382#endif /* !CSH */
2383#endif /* !DOSISH */
2384#endif /* MACOS_TRADITIONAL */
93524f2b 2385 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
4608196e 2386 FALSE, O_RDONLY, 0, NULL);
0d44d22b
NC
2387 fp = IoIFP(io);
2388#endif /* !VMS */
2389 LEAVE;
2390 return fp;
2391}
66610fdd
RGS
2392
2393/*
2394 * Local variables:
2395 * c-indentation-style: bsd
2396 * c-basic-offset: 4
2397 * indent-tabs-mode: t
2398 * End:
2399 *
37442d52
RGS
2400 * ex: set ts=8 sts=4 sw=4 noet:
2401 */