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GvIO(gv) returns NULL for a NULL gv, so refactor to take advantage of this.
[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a687059c 5 *
6e21c824
LW
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
a687059c 8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * Far below them they saw the white waters pour into a foaming bowl, and
13 * then swirl darkly about a deep oval basin in the rocks, until they found
14 * their way out again through a narrow gate, and flowed away, fuming and
15 * chattering, into calmer and more level reaches.
16 *
17 * [p.684 of _The Lord of the Rings_, IV/vi: "The Forbidden Pool"]
a687059c
LW
18 */
19
166f8a29
DM
20/* This file contains functions that do the actual I/O on behalf of ops.
21 * For example, pp_print() calls the do_print() function in this file for
22 * each argument needing printing.
23 */
24
a687059c 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_DOIO_C
a687059c
LW
27#include "perl.h"
28
fe14fcc3 29#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 30#ifndef HAS_SEM
c2ab57d4 31#include <sys/ipc.h>
aec308ec 32#endif
fe14fcc3 33#ifdef HAS_MSG
c2ab57d4 34#include <sys/msg.h>
e5d73d77 35#endif
fe14fcc3 36#ifdef HAS_SHM
c2ab57d4 37#include <sys/shm.h>
a0d0e21e 38# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 39 extern Shmat_t shmat (int, char *, int);
a0d0e21e 40# endif
c2ab57d4 41#endif
e5d73d77 42#endif
c2ab57d4 43
663a0e37 44#ifdef I_UTIME
3730b96e 45# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
PP
46# include <sys/utime.h>
47# else
48# include <utime.h>
49# endif
663a0e37 50#endif
85aff577 51
85aff577
CS
52#ifdef O_EXCL
53# define OPEN_EXCL O_EXCL
54#else
55# define OPEN_EXCL 0
56#endif
a687059c 57
0c19750d
SP
58#define PERL_MODE_MAX 8
59#define PERL_FLAGS_MAX 10
60
76121258 61#include <signal.h>
76121258 62
a687059c 63bool
2fbb330f 64Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw,
a567e93b
NIS
65 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
66 I32 num_svs)
67{
27da23d5 68 dVAR;
890ce7af 69 register IO * const io = GvIOn(gv);
4608196e
RGS
70 PerlIO *saveifp = NULL;
71 PerlIO *saveofp = NULL;
ee518936 72 int savefd = -1;
9f37169a 73 char savetype = IoTYPE_CLOSED;
c07a80fd 74 int writing = 0;
760ac839 75 PerlIO *fp;
c07a80fd
PP
76 int fd;
77 int result;
3500f679 78 bool was_fdopen = FALSE;
16fe6d59 79 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
b931b1d9 80 char *type = NULL;
e9ed3d63 81 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
ee518936 82 SV *namesv;
a687059c 83
7918f24d
NC
84 PERL_ARGS_ASSERT_DO_OPENN;
85
b931b1d9 86 Zero(mode,sizeof(mode),char);
3280af22 87 PL_forkprocess = 1; /* assume true if no fork */
c07a80fd 88
b931b1d9 89 /* Collect default raw/crlf info from the op */
16fe6d59 90 if (PL_op && PL_op->op_type == OP_OPEN) {
c2be40b1 91 /* set up IO layers */
b464bac0 92 const U8 flags = PL_op->op_private;
16fe6d59
GS
93 in_raw = (flags & OPpOPEN_IN_RAW);
94 in_crlf = (flags & OPpOPEN_IN_CRLF);
95 out_raw = (flags & OPpOPEN_OUT_RAW);
96 out_crlf = (flags & OPpOPEN_OUT_CRLF);
97 }
98
b931b1d9 99 /* If currently open - close before we re-open */
a0d0e21e 100 if (IoIFP(io)) {
760ac839 101 fd = PerlIO_fileno(IoIFP(io));
ee518936
NIS
102 if (IoTYPE(io) == IoTYPE_STD) {
103 /* This is a clone of one of STD* handles */
c2ab57d4 104 result = 0;
ee518936
NIS
105 }
106 else if (fd >= 0 && fd <= PL_maxsysfd) {
107 /* This is one of the original STD* handles */
108 saveifp = IoIFP(io);
109 saveofp = IoOFP(io);
8990e307 110 savetype = IoTYPE(io);
ee518936
NIS
111 savefd = fd;
112 result = 0;
6e21c824 113 }
50952442 114 else if (IoTYPE(io) == IoTYPE_PIPE)
3028581b 115 result = PerlProc_pclose(IoIFP(io));
8990e307
LW
116 else if (IoIFP(io) != IoOFP(io)) {
117 if (IoOFP(io)) {
760ac839 118 result = PerlIO_close(IoOFP(io));
6170680b 119 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
120 }
121 else
760ac839 122 result = PerlIO_close(IoIFP(io));
a687059c 123 }
a687059c 124 else
760ac839 125 result = PerlIO_close(IoIFP(io));
ee518936
NIS
126 if (result == EOF && fd > PL_maxsysfd) {
127 /* Why is this not Perl_warn*() call ? */
bf49b057 128 PerlIO_printf(Perl_error_log,
6170680b
IZ
129 "Warning: unable to close filehandle %s properly.\n",
130 GvENAME(gv));
ee518936 131 }
4608196e 132 IoOFP(io) = IoIFP(io) = NULL;
a687059c 133 }
c07a80fd
PP
134
135 if (as_raw) {
b931b1d9 136 /* sysopen style args, i.e. integer mode and permissions */
ee518936 137 STRLEN ix = 0;
e1ec3a88 138 const int appendtrunc =
3dccc55c 139 0
d1da7611 140#ifdef O_APPEND /* Not fully portable. */
3dccc55c 141 |O_APPEND
d1da7611
JH
142#endif
143#ifdef O_TRUNC /* Not fully portable. */
3dccc55c 144 |O_TRUNC
d1da7611 145#endif
3dccc55c 146 ;
6867be6d 147 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
3dccc55c
JH
148 int ismodifying;
149
150 if (num_svs != 0) {
151 Perl_croak(aTHX_ "panic: sysopen with multiple args");
152 }
153 /* It's not always
154
155 O_RDONLY 0
156 O_WRONLY 1
157 O_RDWR 2
158
159 It might be (in OS/390 and Mac OS Classic it is)
160
161 O_WRONLY 1
162 O_RDONLY 2
163 O_RDWR 3
164
165 This means that simple & with O_RDWR would look
166 like O_RDONLY is present. Therefore we have to
167 be more careful.
168 */
169 if ((ismodifying = (rawmode & modifyingmode))) {
170 if ((ismodifying & O_WRONLY) == O_WRONLY ||
171 (ismodifying & O_RDWR) == O_RDWR ||
172 (ismodifying & (O_CREAT|appendtrunc)))
173 TAINT_PROPER("sysopen");
174 }
3b6c1aba 175 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
b931b1d9 176
09458382 177#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
b94c04ac 178 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
5ff3f7a4
GS
179#endif
180
06c7082d 181 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
ee518936 182
59cd0e26 183 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
ee518936
NIS
184 num_svs = 1;
185 svp = &namesv;
bd61b366 186 type = NULL;
b94c04ac 187 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
a687059c 188 }
c07a80fd 189 else {
b931b1d9 190 /* Regular (non-sys) open */
2fbb330f 191 char *name;
faecd977 192 STRLEN olen = len;
b931b1d9
NIS
193 char *tend;
194 int dodup = 0;
c07a80fd 195
2fbb330f 196 type = savepvn(oname, len);
b931b1d9 197 tend = type+len;
faecd977 198 SAVEFREEPV(type);
eb649f83
AMS
199
200 /* Lose leading and trailing white space */
294b3b39
AL
201 while (isSPACE(*type))
202 type++;
eb649f83
AMS
203 while (tend > type && isSPACE(tend[-1]))
204 *--tend = '\0';
205
6170680b 206 if (num_svs) {
c2be40b1 207 /* New style explicit name, type is just mode and layer info */
9a869a14 208#ifdef USE_STDIO
2fbb330f 209 if (SvROK(*svp) && !strchr(oname,'&')) {
9a869a14
RGS
210 if (ckWARN(WARN_IO))
211 Perl_warner(aTHX_ packWARN(WARN_IO),
212 "Can't open a reference");
93189314 213 SETERRNO(EINVAL, LIB_INVARG);
9a869a14
RGS
214 goto say_false;
215 }
216#endif /* USE_STDIO */
d71e3dc3
DM
217 name = (SvOK(*svp) || SvGMAGICAL(*svp)) ?
218 savesvpv (*svp) : savepvs ("");
faecd977 219 SAVEFREEPV(name);
6170680b 220 }
faecd977 221 else {
faecd977 222 name = type;
b931b1d9 223 len = tend-type;
faecd977 224 }
6170680b 225 IoTYPE(io) = *type;
516a5887 226 if ((*type == IoTYPE_RDWR) && /* scary */
01a8ea99 227 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
516a5887 228 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
c2be40b1 229 TAINT_PROPER("open");
6170680b 230 mode[1] = *type++;
c07a80fd 231 writing = 1;
a687059c 232 }
c07a80fd 233
9f37169a 234 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS
235 if (num_svs) {
236 if (type[1] != IoTYPE_STD) {
c2be40b1 237 unknown_open_mode:
b931b1d9
NIS
238 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
239 }
240 type++;
6170680b 241 }
294b3b39
AL
242 do {
243 type++;
244 } while (isSPACE(*type));
faecd977 245 if (!num_svs) {
6170680b 246 name = type;
b931b1d9 247 len = tend-type;
faecd977 248 }
4a7d1889
NIS
249 if (*name == '\0') {
250 /* command is missing 19990114 */
06eaf0bc 251 if (ckWARN(WARN_PIPE))
9014280d 252 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
253 errno = EPIPE;
254 goto say_false;
255 }
f27977c3 256 if (!(*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP
257 TAINT_ENV();
258 TAINT_PROPER("piped open");
b931b1d9 259 if (!num_svs && name[len-1] == '|') {
faecd977 260 name[--len] = '\0' ;
599cee73 261 if (ckWARN(WARN_PIPE))
9014280d 262 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 263 }
a1d180c4 264 mode[0] = 'w';
c07a80fd 265 writing = 1;
0c19750d 266 if (out_raw)
5686ee58 267 mode[1] = 'b';
0c19750d 268 else if (out_crlf)
5686ee58 269 mode[1] = 't';
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 297 if (out_raw)
5686ee58 298 mode[1] = 'b';
0c19750d 299 else if (out_crlf)
5686ee58 300 mode[1] = 't';
6170680b 301 if (*type == '&') {
c07a80fd 302 duplicity:
ecdeb87c 303 dodup = PERLIO_DUP_FD;
e620cd72
NIS
304 type++;
305 if (*type == '=') {
c07a80fd 306 dodup = 0;
e620cd72 307 type++;
4a7d1889 308 }
ee518936 309 if (!num_svs && !*type && supplied_fp) {
4a7d1889 310 /* "<+&" etc. is used by typemaps */
c07a80fd 311 fp = supplied_fp;
ee518936 312 }
a0d0e21e 313 else {
35da51f7 314 PerlIO *that_fp = NULL;
e620cd72 315 if (num_svs > 1) {
fe13d51d 316 /* diag_listed_as: More than one argument to '%s' open */
e620cd72
NIS
317 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
318 }
294b3b39
AL
319 while (isSPACE(*type))
320 type++;
1771866f 321 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 322 fd = SvUV(*svp);
24a7a40d 323 num_svs = 0;
ee518936 324 }
e620cd72 325 else if (isDIGIT(*type)) {
e620cd72
NIS
326 fd = atoi(type);
327 }
c07a80fd 328 else {
e1ec3a88 329 const IO* thatio;
e620cd72
NIS
330 if (num_svs) {
331 thatio = sv_2io(*svp);
332 }
333 else {
35da51f7 334 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 335 0, SVt_PVIO);
e620cd72
NIS
336 thatio = GvIO(thatgv);
337 }
c07a80fd 338 if (!thatio) {
6e21c824 339#ifdef EINVAL
93189314 340 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 341#endif
c07a80fd
PP
342 goto say_false;
343 }
f4e789af 344 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
345 /* Flush stdio buffer before dup. --mjd
346 * Unfortunately SEEK_CURing 0 seems to
347 * be optimized away on most platforms;
348 * only Solaris and Linux seem to flush
349 * on that. --jhi */
2c534a3f
NC
350#ifdef USE_SFIO
351 /* sfio fails to clear error on next
352 sfwrite, contrary to documentation.
04d26ece 353 -- Nicholas Clark */
ecdeb87c
NIS
354 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
355 PerlIO_clearerr(that_fp);
2c534a3f 356#endif
7211d486
JH
357 /* On the other hand, do all platforms
358 * take gracefully to flushing a read-only
359 * filehandle? Perhaps we should do
360 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
361 PerlIO_flush(that_fp);
362 fd = PerlIO_fileno(that_fp);
0759c907
JH
363 /* When dup()ing STDIN, STDOUT or STDERR
364 * explicitly set appropriate access mode */
f4e789af
NC
365 if (that_fp == PerlIO_stdout()
366 || that_fp == PerlIO_stderr())
0759c907 367 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 368 else if (that_fp == PerlIO_stdin())
0759c907
JH
369 IoTYPE(io) = IoTYPE_RDONLY;
370 /* When dup()ing a socket, say result is
371 * one as well */
372 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 373 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
374 }
375 else
376 fd = -1;
a0d0e21e 377 }
ee518936 378 if (!num_svs)
bd61b366 379 type = NULL;
ecdeb87c
NIS
380 if (that_fp) {
381 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
382 }
383 else {
c07a80fd 384 if (dodup)
ecdeb87c
NIS
385 fd = PerlLIO_dup(fd);
386 else
387 was_fdopen = TRUE;
388 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 389 if (dodup && fd >= 0)
ecdeb87c
NIS
390 PerlLIO_close(fd);
391 }
faecd977 392 }
c07a80fd 393 }
ee518936 394 } /* & */
c07a80fd 395 else {
294b3b39
AL
396 while (isSPACE(*type))
397 type++;
b931b1d9 398 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 399 type++;
760ac839 400 fp = PerlIO_stdout();
50952442 401 IoTYPE(io) = IoTYPE_STD;
7cf31beb 402 if (num_svs > 1) {
fe13d51d 403 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS
404 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
405 }
c07a80fd
PP
406 }
407 else {
ee518936 408 if (!num_svs) {
59cd0e26 409 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
410 num_svs = 1;
411 svp = &namesv;
bd61b366 412 type = NULL;
ee518936 413 }
6e60e805 414 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 415 }
ee518936 416 } /* !& */
7e72d509
JH
417 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
418 goto unknown_open_mode;
c2be40b1 419 } /* IoTYPE_WRONLY */
9f37169a 420 else if (*type == IoTYPE_RDONLY) {
294b3b39
AL
421 do {
422 type++;
423 } while (isSPACE(*type));
bf38876a 424 mode[0] = 'r';
0c19750d 425 if (in_raw)
5686ee58 426 mode[1] = 'b';
0c19750d 427 else if (in_crlf)
5686ee58 428 mode[1] = 't';
6170680b 429 if (*type == '&') {
bf38876a 430 goto duplicity;
6170680b 431 }
b931b1d9 432 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 433 type++;
760ac839 434 fp = PerlIO_stdin();
50952442 435 IoTYPE(io) = IoTYPE_STD;
7cf31beb 436 if (num_svs > 1) {
fe13d51d 437 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS
438 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
439 }
a687059c 440 }
ee518936
NIS
441 else {
442 if (!num_svs) {
59cd0e26 443 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
444 num_svs = 1;
445 svp = &namesv;
bd61b366 446 type = NULL;
ee518936 447 }
6e60e805 448 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 449 }
7e72d509
JH
450 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
451 goto unknown_open_mode;
c2be40b1
JH
452 } /* IoTYPE_RDONLY */
453 else if ((num_svs && /* '-|...' or '...|' */
454 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 455 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 456 if (num_svs) {
b931b1d9 457 type += 2; /* skip over '-|' */
6170680b
IZ
458 }
459 else {
b931b1d9
NIS
460 *--tend = '\0';
461 while (tend > type && isSPACE(tend[-1]))
462 *--tend = '\0';
a6e20a40
AL
463 for (; isSPACE(*type); type++)
464 ;
6170680b 465 name = type;
b931b1d9 466 len = tend-type;
6170680b 467 }
4a7d1889
NIS
468 if (*name == '\0') {
469 /* command is missing 19990114 */
06eaf0bc 470 if (ckWARN(WARN_PIPE))
9014280d 471 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
472 errno = EPIPE;
473 goto say_false;
474 }
770526c1 475 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
476 TAINT_ENV();
477 TAINT_PROPER("piped open");
a1d180c4 478 mode[0] = 'r';
0c19750d 479
0c19750d 480 if (in_raw)
5686ee58 481 mode[1] = 'b';
0c19750d 482 else if (in_crlf)
5686ee58 483 mode[1] = 't';
0c19750d 484
4a7d1889
NIS
485 if (num_svs > 1) {
486 fp = PerlProc_popen_list(mode,num_svs,svp);
487 }
e620cd72 488 else {
4a7d1889
NIS
489 fp = PerlProc_popen(name,mode);
490 }
50952442 491 IoTYPE(io) = IoTYPE_PIPE;
1771866f 492 if (num_svs) {
294b3b39
AL
493 while (isSPACE(*type))
494 type++;
1771866f
NIS
495 if (*type) {
496 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
497 goto say_false;
498 }
499 }
500 }
a687059c 501 }
c2be40b1 502 else { /* layer(Args) */
6170680b 503 if (num_svs)
c2be40b1 504 goto unknown_open_mode;
6170680b 505 name = type;
50952442 506 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
507 for (; isSPACE(*name); name++)
508 ;
88b61e10 509 mode[0] = 'r';
0c19750d 510
0c19750d 511 if (in_raw)
5686ee58 512 mode[1] = 'b';
0c19750d 513 else if (in_crlf)
5686ee58 514 mode[1] = 't';
0c19750d 515
770526c1 516 if (*name == '-' && name[1] == '\0') {
760ac839 517 fp = PerlIO_stdin();
50952442 518 IoTYPE(io) = IoTYPE_STD;
a687059c 519 }
16fe6d59 520 else {
ee518936 521 if (!num_svs) {
59cd0e26 522 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
523 num_svs = 1;
524 svp = &namesv;
bd61b366 525 type = NULL;
ee518936 526 }
6e60e805 527 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 528 }
a687059c
LW
529 }
530 }
bee1dbe2 531 if (!fp) {
ce44635a 532 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 533 && strchr(oname, '\n')
ce44635a 534
041457d9 535 )
9014280d 536 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 537 goto say_false;
bee1dbe2 538 }
a00b5bd3
NIS
539
540 if (ckWARN(WARN_IO)) {
541 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
542 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 543 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
544 "Filehandle STD%s reopened as %s only for input",
545 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
546 GvENAME(gv));
a00b5bd3 547 }
ee518936 548 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 549 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
550 "Filehandle STDIN reopened as %s only for output",
551 GvENAME(gv));
a00b5bd3
NIS
552 }
553 }
554
e99cca91 555 fd = PerlIO_fileno(fp);
e934609f
JH
556 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
557 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
558 * type probe for socket-ness.
559 */
560 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
561 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
562 /* If PerlIO claims to have fd we had better be able to fstat() it. */
563 (void) PerlIO_close(fp);
6e21c824 564 goto say_false;
a687059c 565 }
7114a2d2 566#ifndef PERL_MICRO
3280af22 567 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 568 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
569#ifdef HAS_SOCKET
570 else if (
c623bd54 571#ifdef S_IFMT
3280af22 572 !(PL_statbuf.st_mode & S_IFMT)
99b89507 573#else
b28d0864 574 !PL_statbuf.st_mode
99b89507 575#endif
0759c907
JH
576 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
577 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
578 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
579 char tmpbuf[256];
580 Sock_size_t buflen = sizeof tmpbuf;
581 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
582 || errno != ENOTSOCK)
583 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
584 /* but some return 0 for streams too, sigh */
99b89507 585 }
e99cca91 586#endif /* HAS_SOCKET */
7114a2d2 587#endif /* !PERL_MICRO */
a687059c 588 }
e99cca91
NIS
589
590 /* Eeek - FIXME !!!
591 * If this is a standard handle we discard all the layer stuff
592 * and just dup the fd into whatever was on the handle before !
593 */
594
6e21c824 595 if (saveifp) { /* must use old fp? */
f5b9d040 596 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 597 then dup the new fileno down
f5b9d040 598 */
6e21c824 599 if (saveofp) {
f5b9d040 600 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 601 if (saveofp != saveifp) { /* was a socket? */
760ac839 602 PerlIO_close(saveofp);
6e21c824
LW
603 }
604 }
6e60e805 605 if (savefd != fd) {
e934609f 606 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
607 is assigned to (say) STDOUT - for now let dup2() fail
608 and provide the error
609 */
bd4a5668
NIS
610 if (PerlLIO_dup2(fd, savefd) < 0) {
611 (void)PerlIO_close(fp);
612 goto say_false;
613 }
d082dcd6 614#ifdef VMS
6e60e805 615 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
616 char newname[FILENAME_MAX+1];
617 if (PerlIO_getname(fp, newname)) {
618 if (fd == PerlIO_fileno(PerlIO_stdout()))
619 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
620 if (fd == PerlIO_fileno(PerlIO_stderr()))
621 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
622 }
d082dcd6
JH
623 }
624#endif
d0e2cf63
AMS
625
626#if !defined(WIN32)
627 /* PL_fdpid isn't used on Windows, so avoid this useless work.
628 * XXX Probably the same for a lot of other places. */
629 {
630 Pid_t pid;
631 SV *sv;
632
d0e2cf63 633 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 634 SvUPGRADE(sv, SVt_IV);
d0e2cf63 635 pid = SvIVX(sv);
45977657 636 SvIV_set(sv, 0);
d0e2cf63 637 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 638 SvUPGRADE(sv, SVt_IV);
45977657 639 SvIV_set(sv, pid);
d0e2cf63
AMS
640 }
641#endif
642
e212fc47
AMS
643 if (was_fdopen) {
644 /* need to close fp without closing underlying fd */
645 int ofd = PerlIO_fileno(fp);
646 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
647#if defined(HAS_FCNTL) && defined(F_SETFD)
648 /* Assume if we have F_SETFD we have F_GETFD */
649 int coe = fcntl(ofd,F_GETFD);
650#endif
e212fc47
AMS
651 PerlIO_close(fp);
652 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
653#if defined(HAS_FCNTL) && defined(F_SETFD)
654 /* The dup trick has lost close-on-exec on ofd */
655 fcntl(ofd,F_SETFD, coe);
656#endif
e212fc47 657 PerlLIO_close(dupfd);
ecdeb87c 658 }
e212fc47
AMS
659 else
660 PerlIO_close(fp);
6e21c824
LW
661 }
662 fp = saveifp;
760ac839 663 PerlIO_clearerr(fp);
e99cca91 664 fd = PerlIO_fileno(fp);
6e21c824 665 }
a0d0e21e 666#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 667 if (fd >= 0) {
4ee39169 668 dSAVE_ERRNO;
a8710ca1 669 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
4ee39169 670 RESTORE_ERRNO;
a8710ca1 671 }
1462b684 672#endif
8990e307 673 IoIFP(io) = fp;
b931b1d9 674
684bef36 675 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 676 if (writing) {
50952442 677 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 678 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 679 char *s = mode;
3b6c1aba
JH
680 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
681 s++;
a33cf58c 682 *s = 'w';
1feb1812 683 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 684 PerlIO_close(fp);
4608196e 685 IoIFP(io) = NULL;
6e21c824 686 goto say_false;
fe14fcc3 687 }
1462b684
LW
688 }
689 else
8990e307 690 IoOFP(io) = fp;
bf38876a 691 }
a687059c 692 return TRUE;
6e21c824
LW
693
694say_false:
8990e307
LW
695 IoIFP(io) = saveifp;
696 IoOFP(io) = saveofp;
697 IoTYPE(io) = savetype;
6e21c824 698 return FALSE;
a687059c
LW
699}
700
760ac839 701PerlIO *
864dbfa3 702Perl_nextargv(pTHX_ register GV *gv)
a687059c 703{
97aff369 704 dVAR;
79072805 705 register SV *sv;
99b89507 706#ifndef FLEXFILENAMES
c623bd54
LW
707 int filedev;
708 int fileino;
99b89507 709#endif
761237fe
JB
710 Uid_t fileuid;
711 Gid_t filegid;
2d03de9c 712 IO * const io = GvIOp(gv);
fe14fcc3 713
7918f24d
NC
714 PERL_ARGS_ASSERT_NEXTARGV;
715
3280af22 716 if (!PL_argvoutgv)
fafc274c 717 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
18708f5a
GS
718 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
719 IoFLAGS(io) &= ~IOf_START;
7a1c5554 720 if (PL_inplace) {
294b3b39 721 assert(PL_defoutgv);
29a861e7
NC
722 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
723 SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 724 }
18708f5a 725 }
3280af22
NIS
726 if (PL_filemode & (S_ISUID|S_ISGID)) {
727 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 728#ifdef HAS_FCHMOD
c797f2d8
DM
729 if (PL_lastfd != -1)
730 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 731#else
b28d0864 732 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
733#endif
734 }
c797f2d8 735 PL_lastfd = -1;
3280af22 736 PL_filemode = 0;
5c501b37 737 if (!GvAV(gv))
4608196e 738 return NULL;
79072805 739 while (av_len(GvAV(gv)) >= 0) {
85aff577 740 STRLEN oldlen;
79072805 741 sv = av_shift(GvAV(gv));
8990e307 742 SAVEFREESV(sv);
e203899d 743 sv_setsv(GvSVn(gv),sv);
79072805 744 SvSETMAGIC(GvSV(gv));
3280af22 745 PL_oldname = SvPVx(GvSV(gv), oldlen);
4608196e 746 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
3280af22 747 if (PL_inplace) {
79072805 748 TAINT_PROPER("inplace open");
3280af22 749 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC
750 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
751 SVt_PVIO));
a0d0e21e 752 return IoIFP(GvIOp(gv));
c623bd54 753 }
99b89507 754#ifndef FLEXFILENAMES
b28d0864
NIS
755 filedev = PL_statbuf.st_dev;
756 fileino = PL_statbuf.st_ino;
99b89507 757#endif
3280af22
NIS
758 PL_filemode = PL_statbuf.st_mode;
759 fileuid = PL_statbuf.st_uid;
760 filegid = PL_statbuf.st_gid;
761 if (!S_ISREG(PL_filemode)) {
9b387841
NC
762 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
763 "Can't do inplace edit: %s is not a regular file",
764 PL_oldname );
79072805 765 do_close(gv,FALSE);
c623bd54
LW
766 continue;
767 }
c9930541 768 if (*PL_inplace && strNE(PL_inplace, "*")) {
2d03de9c 769 const char *star = strchr(PL_inplace, '*');
2d259d92 770 if (star) {
2d03de9c 771 const char *begin = PL_inplace;
76f68e9b 772 sv_setpvs(sv, "");
2d259d92
CK
773 do {
774 sv_catpvn(sv, begin, star - begin);
3280af22 775 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
776 begin = ++star;
777 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
778 if (*begin)
779 sv_catpv(sv,begin);
2d259d92
CK
780 }
781 else {
3280af22 782 sv_catpv(sv,PL_inplace);
2d259d92 783 }
c623bd54 784#ifndef FLEXFILENAMES
95a20fc0 785 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
786 && PL_statbuf.st_dev == filedev
787 && PL_statbuf.st_ino == fileino)
39e571d4 788#ifdef DJGPP
5f74f29c 789 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 790#endif
f248d071
GS
791 )
792 {
9b387841
NC
793 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
794 "Can't do inplace edit: %"SVf" would not be unique",
795 SVfARG(sv));
79072805 796 do_close(gv,FALSE);
c623bd54
LW
797 continue;
798 }
799#endif
fe14fcc3 800#ifdef HAS_RENAME
2585f9a3 801#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 802 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
9b387841
NC
803 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
804 "Can't rename %s to %"SVf": %s, skipping file",
805 PL_oldname, SVfARG(sv), Strerror(errno));
79072805 806 do_close(gv,FALSE);
c623bd54
LW
807 continue;
808 }
a687059c 809#else
79072805 810 do_close(gv,FALSE);
95a20fc0
SP
811 (void)PerlLIO_unlink(SvPVX_const(sv));
812 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
30fc4309 813 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),TRUE,O_RDONLY,0,NULL);
55497cff 814#endif /* DOSISH */
ff8e2863 815#else
95a20fc0
SP
816 (void)UNLINK(SvPVX_const(sv));
817 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
9b387841
NC
818 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
819 "Can't rename %s to %"SVf": %s, skipping file",
820 PL_oldname, SVfARG(sv), Strerror(errno) );
79072805 821 do_close(gv,FALSE);
c623bd54
LW
822 continue;
823 }
b28d0864 824 (void)UNLINK(PL_oldname);
a687059c
LW
825#endif
826 }
827 else {
c030f24b 828#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 829# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 830 if (UNLINK(PL_oldname) < 0) {
9b387841
NC
831 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
832 "Can't remove %s: %s, skipping file",
833 PL_oldname, Strerror(errno) );
79072805 834 do_close(gv,FALSE);
fe14fcc3
LW
835 continue;
836 }
edc7bc49 837# endif
ff8e2863 838#else
cea2e8a9 839 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 840#endif
a687059c
LW
841 }
842
30fc4309 843 sv_setpvn(sv,PL_oldname,oldlen);
748a9306 844 SETERRNO(0,0); /* in case sprintf set errno */
7f8ee4be
NC
845 if (!Perl_do_openn(aTHX_ PL_argvoutgv, (char*)SvPVX_const(sv),
846 SvCUR(sv), TRUE,
4119ab01 847#ifdef VMS
7f8ee4be 848 O_WRONLY|O_CREAT|O_TRUNC,0,
4119ab01 849#else
7f8ee4be 850 O_WRONLY|O_CREAT|OPEN_EXCL,0600,
4119ab01 851#endif
7f8ee4be 852 NULL, NULL, 0)) {
9b387841
NC
853 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
854 PL_oldname, Strerror(errno) );
79072805 855 do_close(gv,FALSE);
fe14fcc3
LW
856 continue;
857 }
3280af22
NIS
858 setdefout(PL_argvoutgv);
859 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
860 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 861#ifdef HAS_FCHMOD
3280af22 862 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 863#else
3e3baf6d
TB
864# if !(defined(WIN32) && defined(__BORLANDC__))
865 /* Borland runtime creates a readonly file! */
b28d0864 866 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 867# endif
a687059c 868#endif
3280af22 869 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 870#ifdef HAS_FCHOWN
3280af22 871 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 872#else
fe14fcc3 873#ifdef HAS_CHOWN
b28d0864 874 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 875#endif
b1248f16 876#endif
fe14fcc3 877 }
a687059c 878 }
a0d0e21e 879 return IoIFP(GvIOp(gv));
a687059c 880 }
4d61ec05 881 else {
4d61ec05 882 if (ckWARN_d(WARN_INPLACE)) {
4373e329 883 const int eno = errno;
6af84f9f
GS
884 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
885 && !S_ISREG(PL_statbuf.st_mode))
886 {
9014280d 887 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
4d61ec05 888 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 889 PL_oldname);
6af84f9f 890 }
4d61ec05 891 else
9014280d 892 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
6af84f9f 893 PL_oldname, Strerror(eno));
4d61ec05
GS
894 }
895 }
a687059c 896 }
18708f5a
GS
897 if (io && (IoFLAGS(io) & IOf_ARGV))
898 IoFLAGS(io) |= IOf_START;
3280af22
NIS
899 if (PL_inplace) {
900 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
901 if (io && (IoFLAGS(io) & IOf_ARGV)
902 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
903 {
159b6efe 904 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
18708f5a
GS
905 setdefout(oldout);
906 SvREFCNT_dec(oldout);
4608196e 907 return NULL;
18708f5a 908 }
fafc274c 909 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 910 }
4608196e 911 return NULL;
a687059c
LW
912}
913
517844ec 914/* explicit renamed to avoid C++ conflict -- kja */
a687059c 915bool
864dbfa3 916Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 917{
97aff369 918 dVAR;
1193dd27
IZ
919 bool retval;
920 IO *io;
a687059c 921
79072805 922 if (!gv)
3280af22 923 gv = PL_argvgv;
6e592b3a 924 if (!gv || !isGV_with_GP(gv)) {
1d2dff63 925 if (not_implicit)
93189314 926 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 927 return FALSE;
99b89507 928 }
79072805
LW
929 io = GvIO(gv);
930 if (!io) { /* never opened */
1d2dff63 931 if (not_implicit) {
51087808 932 report_evil_fh(gv);
93189314 933 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 934 }
a687059c
LW
935 return FALSE;
936 }
f2b5be74 937 retval = io_close(io, not_implicit);
517844ec 938 if (not_implicit) {
1193dd27
IZ
939 IoLINES(io) = 0;
940 IoPAGE(io) = 0;
941 IoLINES_LEFT(io) = IoPAGE_LEN(io);
942 }
50952442 943 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
944 return retval;
945}
946
947bool
f2b5be74 948Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27 949{
97aff369 950 dVAR;
1193dd27 951 bool retval = FALSE;
1193dd27 952
7918f24d
NC
953 PERL_ARGS_ASSERT_IO_CLOSE;
954
8990e307 955 if (IoIFP(io)) {
50952442 956 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 957 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 958 if (not_implicit) {
37038d91 959 STATUS_NATIVE_CHILD_SET(status);
e5218da5 960 retval = (STATUS_UNIX == 0);
f2b5be74
GS
961 }
962 else {
963 retval = (status != -1);
964 }
a687059c 965 }
50952442 966 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
967 retval = TRUE;
968 else {
8990e307 969 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 970 const bool prev_err = PerlIO_error(IoOFP(io));
e199e3be 971 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 972 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 973 }
e199e3be 974 else {
0bcc34c2 975 const bool prev_err = PerlIO_error(IoIFP(io));
e199e3be
RGS
976 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
977 }
a687059c 978 }
4608196e 979 IoOFP(io) = IoIFP(io) = NULL;
79072805 980 }
f2b5be74 981 else if (not_implicit) {
93189314 982 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 983 }
1193dd27 984
a687059c
LW
985 return retval;
986}
987
988bool
864dbfa3 989Perl_do_eof(pTHX_ GV *gv)
a687059c 990{
97aff369 991 dVAR;
0bcc34c2 992 register IO * const io = GvIO(gv);
a687059c 993
7918f24d
NC
994 PERL_ARGS_ASSERT_DO_EOF;
995
79072805 996 if (!io)
a687059c 997 return TRUE;
7716c5c5 998 else if (IoTYPE(io) == IoTYPE_WRONLY)
a5390457 999 report_wrongway_fh(gv, '>');
a687059c 1000
8990e307 1001 while (IoIFP(io)) {
760ac839 1002 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1003 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1004 return FALSE; /* this is the most usual case */
1005 }
a687059c 1006
79852593
NC
1007 {
1008 /* getc and ungetc can stomp on errno */
4ee39169 1009 dSAVE_ERRNO;
79852593
NC
1010 const int ch = PerlIO_getc(IoIFP(io));
1011 if (ch != EOF) {
1012 (void)PerlIO_ungetc(IoIFP(io),ch);
4ee39169 1013 RESTORE_ERRNO;
79852593
NC
1014 return FALSE;
1015 }
4ee39169 1016 RESTORE_ERRNO;
a687059c 1017 }
fab3f3a7 1018
760ac839 1019 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1020 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1021 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1022 }
533c011a 1023 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1024 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1025 return TRUE;
1026 }
1027 else
1028 return TRUE; /* normal fp, definitely end of file */
1029 }
1030 return TRUE;
1031}
1032
5ff3f7a4 1033Off_t
864dbfa3 1034Perl_do_tell(pTHX_ GV *gv)
a687059c 1035{
97aff369 1036 dVAR;
9c9f25b8 1037 IO *const io = GvIO(gv);
96e4d5b1 1038 register PerlIO *fp;
a687059c 1039
7918f24d
NC
1040 PERL_ARGS_ASSERT_DO_TELL;
1041
9c9f25b8 1042 if (io && (fp = IoIFP(io))) {
bee1dbe2 1043#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1044 if (PerlIO_eof(fp))
1045 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1046#endif
8903cb82 1047 return PerlIO_tell(fp);
96e4d5b1 1048 }
51087808 1049 report_evil_fh(gv);
93189314 1050 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1051 return (Off_t)-1;
a687059c
LW
1052}
1053
1054bool
864dbfa3 1055Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1056{
97aff369 1057 dVAR;
9c9f25b8 1058 IO *const io = GvIO(gv);
137443ea 1059 register PerlIO *fp;
a687059c 1060
9c9f25b8 1061 if (io && (fp = IoIFP(io))) {
bee1dbe2 1062#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1063 if (PerlIO_eof(fp))
1064 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1065#endif
8903cb82 1066 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1067 }
51087808 1068 report_evil_fh(gv);
93189314 1069 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1070 return FALSE;
1071}
1072
97cc44eb 1073Off_t
864dbfa3 1074Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1075{
97aff369 1076 dVAR;
9c9f25b8 1077 IO *const io = GvIO(gv);
8903cb82
PP
1078 register PerlIO *fp;
1079
7918f24d
NC
1080 PERL_ARGS_ASSERT_DO_SYSSEEK;
1081
9c9f25b8 1082 if (io && (fp = IoIFP(io)))
3028581b 1083 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
51087808 1084 report_evil_fh(gv);
93189314 1085 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1086 return (Off_t)-1;
8903cb82
PP
1087}
1088
6ff81951 1089int
a79b25b7 1090Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
16fe6d59
GS
1091{
1092 int mode = O_BINARY;
a79b25b7 1093 if (s) {
16fe6d59
GS
1094 while (*s) {
1095 if (*s == ':') {
1096 switch (s[1]) {
1097 case 'r':
e963d6d2 1098 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1099 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1100 {
1101 mode = O_BINARY;
1102 s += 4;
1103 len -= 4;
1104 break;
1105 }
1106 /* FALL THROUGH */
1107 case 'c':
e963d6d2 1108 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1109 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1110 {
1111 mode = O_TEXT;
1112 s += 5;
1113 len -= 5;
1114 break;
1115 }
1116 /* FALL THROUGH */
1117 default:
1118 goto fail_discipline;
1119 }
1120 }
1121 else if (isSPACE(*s)) {
1122 ++s;
1123 --len;
1124 }
1125 else {
4373e329 1126 const char *end;
16fe6d59
GS
1127fail_discipline:
1128 end = strchr(s+1, ':');
1129 if (!end)
1130 end = s+len;
60382766 1131#ifndef PERLIO_LAYERS
363c40c4 1132 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1133#else
18a33fb5 1134 len -= end-s;
60382766
NIS
1135 s = end;
1136#endif
16fe6d59
GS
1137 }
1138 }
1139 }
1140 return mode;
1141}
1142
58e24eff 1143#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1144I32
1145my_chsize(int fd, Off_t length)
6eb13c3b 1146{
58e24eff
SH
1147#ifdef F_FREESP
1148 /* code courtesy of William Kucharski */
1149#define HAS_CHSIZE
1150
c623ac67 1151 Stat_t filebuf;
6eb13c3b 1152
3028581b 1153 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1154 return -1;
1155
1156 if (filebuf.st_size < length) {
1157
1158 /* extend file length */
1159
3028581b 1160 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1161 return -1;
1162
1163 /* write a "0" byte */
1164
3028581b 1165 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1166 return -1;
1167 }
1168 else {
1169 /* truncate length */
35da51f7 1170 struct flock fl;
6eb13c3b
LW
1171 fl.l_whence = 0;
1172 fl.l_len = 0;
1173 fl.l_start = length;
a0d0e21e 1174 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1175
1176 /*
a0d0e21e 1177 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1178 * fcntl(2), which truncates the file so that it ends at the
1179 * position indicated by fl.l_start.
1180 *
1181 * Will minor miracles never cease?
1182 */
1183
a0d0e21e 1184 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1185 return -1;
1186
1187 }
6eb13c3b 1188 return 0;
58e24eff 1189#else
27da23d5 1190 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1191#endif /* F_FREESP */
27da23d5 1192 return -1;
58e24eff
SH
1193}
1194#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1195
a687059c 1196bool
864dbfa3 1197Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1198{
97aff369 1199 dVAR;
7918f24d
NC
1200
1201 PERL_ARGS_ASSERT_DO_PRINT;
1202
79072805
LW
1203 /* assuming fp is checked earlier */
1204 if (!sv)
1205 return TRUE;
e9950d3b
NC
1206 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1207 assert(!SvGMAGICAL(sv));
1208 if (SvIsUV(sv))
1209 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1210 else
1211 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1212 return !PerlIO_error(fp);
1213 }
1214 else {
1215 STRLEN len;
676f44e7 1216 /* Do this first to trigger any overloading. */
e9950d3b
NC
1217 const char *tmps = SvPV_const(sv, len);
1218 U8 *tmpbuf = NULL;
1219 bool happy = TRUE;
1220
7d59b7e4 1221 if (PerlIO_isutf8(fp)) {
676f44e7
NC
1222 if (!SvUTF8(sv)) {
1223 /* We don't modify the original scalar. */
1224 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1225 tmps = (char *) tmpbuf;
1226 }
7d59b7e4 1227 }
ae798467 1228 else if (DO_UTF8(sv)) {
676f44e7
NC
1229 STRLEN tmplen = len;
1230 bool utf8 = TRUE;
35da51f7 1231 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7
NC
1232 if (!utf8) {
1233 tmpbuf = result;
1234 tmps = (char *) tmpbuf;
1235 len = tmplen;
1236 }
1237 else {
1238 assert((char *)result == tmps);
9b387841 1239 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
21630838
FC
1240 "Wide character in %s",
1241 PL_op ? OP_DESC(PL_op) : "print"
1242 );
ae798467
NIS
1243 }
1244 }
e9950d3b
NC
1245 /* To detect whether the process is about to overstep its
1246 * filesize limit we would need getrlimit(). We could then
1247 * also transparently raise the limit with setrlimit() --
1248 * but only until the system hard limit/the filesystem limit,
1249 * at which we would get EPERM. Note that when using buffered
1250 * io the write failure can be delayed until the flush/close. --jhi */
1251 if (len && (PerlIO_write(fp,tmps,len) == 0))
1252 happy = FALSE;
1253 Safefree(tmpbuf);
1254 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 1255 }
a687059c
LW
1256}
1257
79072805 1258I32
0d7d409d 1259Perl_my_stat_flags(pTHX_ const U32 flags)
a687059c 1260{
97aff369 1261 dVAR;
39644a26 1262 dSP;
79072805 1263 IO *io;
2dd78f96 1264 GV* gv;
79072805 1265
533c011a 1266 if (PL_op->op_flags & OPf_REF) {
924508f0 1267 EXTEND(SP,1);
2dd78f96 1268 gv = cGVOP_gv;
748a9306 1269 do_fstat:
5228a96c
SP
1270 if (gv == PL_defgv)
1271 return PL_laststatval;
2dd78f96 1272 io = GvIO(gv);
ad02613c 1273 do_fstat_have_io:
5228a96c
SP
1274 PL_laststype = OP_STAT;
1275 PL_statgv = gv;
76f68e9b 1276 sv_setpvs(PL_statname, "");
5228a96c
SP
1277 if(io) {
1278 if (IoIFP(io)) {
1279 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1280 } else if (IoDIRP(io)) {
3497a01f 1281 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c 1282 } else {
51087808 1283 report_evil_fh(gv);
5228a96c
SP
1284 return (PL_laststatval = -1);
1285 }
1286 } else {
51087808 1287 report_evil_fh(gv);
5228a96c
SP
1288 return (PL_laststatval = -1);
1289 }
a687059c 1290 }
fbb0b3b3
RGS
1291 else if (PL_op->op_private & OPpFT_STACKED) {
1292 return PL_laststatval;
1293 }
a687059c 1294 else {
0bcc34c2 1295 SV* const sv = POPs;
4373e329 1296 const char *s;
4ecd490c 1297 STRLEN len;
79072805 1298 PUTBACK;
6e592b3a 1299 if (isGV_with_GP(sv)) {
159b6efe 1300 gv = MUTABLE_GV(sv);
748a9306
LW
1301 goto do_fstat;
1302 }
6e592b3a 1303 else if (SvROK(sv) && isGV_with_GP(SvRV(sv))) {
159b6efe 1304 gv = MUTABLE_GV(SvRV(sv));
748a9306
LW
1305 goto do_fstat;
1306 }
ad02613c 1307 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
a45c7426 1308 io = MUTABLE_IO(SvRV(sv));
7f39519f 1309 gv = NULL;
ad02613c
SP
1310 goto do_fstat_have_io;
1311 }
748a9306 1312
0d7d409d 1313 s = SvPV_flags_const(sv, len, flags);
a0714e2c 1314 PL_statgv = NULL;
4ecd490c 1315 sv_setpvn(PL_statname, s, len);
95a20fc0 1316 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1317 PL_laststype = OP_STAT;
1318 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1319 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1320 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1321 return PL_laststatval;
a687059c
LW
1322 }
1323}
1324
fbb0b3b3 1325
79072805 1326I32
0d7d409d 1327Perl_my_lstat_flags(pTHX_ const U32 flags)
c623bd54 1328{
97aff369 1329 dVAR;
0bd48802 1330 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1331 dSP;
79072805 1332 SV *sv;
b16276bb 1333 const char *file;
533c011a 1334 if (PL_op->op_flags & OPf_REF) {
924508f0 1335 EXTEND(SP,1);
638eceb6 1336 if (cGVOP_gv == PL_defgv) {
3280af22 1337 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1338 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1339 return PL_laststatval;
fe14fcc3 1340 }
5d3e98de 1341 if (ckWARN(WARN_IO)) {
9014280d 1342 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1343 GvENAME(cGVOP_gv));
1344 return (PL_laststatval = -1);
1345 }
fe14fcc3 1346 }
041457d9
DM
1347 else if (PL_laststype != OP_LSTAT
1348 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
fbb0b3b3 1349 Perl_croak(aTHX_ no_prev_lstat);
c623bd54 1350
3280af22 1351 PL_laststype = OP_LSTAT;
a0714e2c 1352 PL_statgv = NULL;
79072805
LW
1353 sv = POPs;
1354 PUTBACK;
6e592b3a 1355 if (SvROK(sv) && isGV_with_GP(SvRV(sv)) && ckWARN(WARN_IO)) {
9014280d 1356 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
159b6efe 1357 GvENAME((const GV *)SvRV(sv)));
5d3e98de
RGS
1358 return (PL_laststatval = -1);
1359 }
0d7d409d 1360 file = SvPV_flags_const_nolen(sv, flags);
b16276bb
VP
1361 sv_setpv(PL_statname,file);
1362 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1363 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
9014280d 1364 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1365 return PL_laststatval;
c623bd54
LW
1366}
1367
a0f2c8ec
JD
1368static void
1369S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1370{
1371 const int e = errno;
7918f24d 1372 PERL_ARGS_ASSERT_EXEC_FAILED;
a0f2c8ec
JD
1373 if (ckWARN(WARN_EXEC))
1374 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1375 cmd, Strerror(e));
1376 if (do_report) {
1377 PerlLIO_write(fd, (void*)&e, sizeof(int));
1378 PerlLIO_close(fd);
1379 }
1380}
1381
d5a9bfb0 1382bool
2aa1486d
GS
1383Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1384 int fd, int do_report)
d5a9bfb0 1385{
27da23d5 1386 dVAR;
7918f24d 1387 PERL_ARGS_ASSERT_DO_AEXEC5;
e37778c2 1388#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH
1389 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1390#else
79072805 1391 if (sp > mark) {
360ea906 1392 const char **a;
6136c704 1393 const char *tmps = NULL;
360ea906 1394 Newx(PL_Argv, sp - mark + 1, const char*);
c3c5fad7 1395 a = PL_Argv;
890ce7af 1396
79072805
LW
1397 while (++mark <= sp) {
1398 if (*mark)
360ea906 1399 *a++ = SvPV_nolen_const(*mark);
a687059c
LW
1400 else
1401 *a++ = "";
1402 }
6136c704 1403 *a = NULL;
91b2752f 1404 if (really)
e62f0680 1405 tmps = SvPV_nolen_const(really);
91b2752f
RG
1406 if ((!really && *PL_Argv[0] != '/') ||
1407 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1408 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1409 PERL_FPU_PRE_EXEC
91b2752f 1410 if (really && *tmps)
b4748376 1411 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1412 else
b4748376 1413 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1414 PERL_FPU_POST_EXEC
a0f2c8ec 1415 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
a687059c 1416 }
bee1dbe2 1417 do_execfree();
cd39f2b6 1418#endif
a687059c
LW
1419 return FALSE;
1420}
1421
fe14fcc3 1422void
864dbfa3 1423Perl_do_execfree(pTHX)
ff8e2863 1424{
97aff369 1425 dVAR;
43c5f42d 1426 Safefree(PL_Argv);
4608196e 1427 PL_Argv = NULL;
43c5f42d 1428 Safefree(PL_Cmd);
bd61b366 1429 PL_Cmd = NULL;
ff8e2863
LW
1430}
1431
9555a685 1432#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1433
1434bool
2fbb330f 1435Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1436{
27da23d5 1437 dVAR;
360ea906 1438 register const char **a;
a687059c 1439 register char *s;
15db3ae2 1440 char *buf;
2fbb330f 1441 char *cmd;
2fbb330f 1442 /* Make a copy so we can change it */
6fca0082 1443 const Size_t cmdlen = strlen(incmd) + 1;
7918f24d
NC
1444
1445 PERL_ARGS_ASSERT_DO_EXEC3;
1446
15db3ae2
DM
1447 Newx(buf, cmdlen, char);
1448 cmd = buf;
cfff9797 1449 memcpy(cmd, incmd, cmdlen);
a687059c 1450
748a9306
LW
1451 while (*cmd && isSPACE(*cmd))
1452 cmd++;
1453
a687059c
LW
1454 /* save an extra exec if possible */
1455
bf38876a 1456#ifdef CSH
d05c1ba0 1457 {
0c19750d 1458 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1459 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1460 strnEQ(cmd+PL_cshlen," -c",3)) {
28f0d0ec 1461 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH
1462 s = cmd+PL_cshlen+3;
1463 if (*s == 'f') {
1464 s++;
28f0d0ec 1465 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH
1466 }
1467 if (*s == ' ')
1468 s++;
1469 if (*s++ == '\'') {
0bcc34c2 1470 char * const ncmd = s;
d05c1ba0
JH
1471
1472 while (*s)
1473 s++;
1474 if (s[-1] == '\n')
1475 *--s = '\0';
1476 if (s[-1] == '\'') {
1477 *--s = '\0';
b35112e7 1478 PERL_FPU_PRE_EXEC
7c0dd7ca 1479 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 1480 PERL_FPU_POST_EXEC
d05c1ba0 1481 *s = '\'';
a0f2c8ec 1482 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
15db3ae2 1483 Safefree(buf);
d05c1ba0
JH
1484 return FALSE;
1485 }
1486 }
a687059c
LW
1487 }
1488 }
bf38876a 1489#endif /* CSH */
a687059c
LW
1490
1491 /* see if there are shell metacharacters in it */
1492
748a9306
LW
1493 if (*cmd == '.' && isSPACE(cmd[1]))
1494 goto doshell;
1495
1496 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1497 goto doshell;
1498
294b3b39
AL
1499 s = cmd;
1500 while (isALNUM(*s))
1501 s++; /* catch VAR=val gizmo */
63f2c1e1
LW
1502 if (*s == '=')
1503 goto doshell;
748a9306 1504
a687059c 1505 for (s = cmd; *s; s++) {
d05c1ba0
JH
1506 if (*s != ' ' && !isALPHA(*s) &&
1507 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1508 if (*s == '\n' && !s[1]) {
1509 *s = '\0';
1510 break;
1511 }
603a98b0
IZ
1512 /* handle the 2>&1 construct at the end */
1513 if (*s == '>' && s[1] == '&' && s[2] == '1'
1514 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1515 && (!s[3] || isSPACE(s[3])))
1516 {
6867be6d 1517 const char *t = s + 3;
603a98b0
IZ
1518
1519 while (*t && isSPACE(*t))
1520 ++t;
943bbd07 1521 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1522 s[-2] = '\0';
1523 break;
1524 }
1525 }
a687059c 1526 doshell:
b35112e7 1527 PERL_FPU_PRE_EXEC
7c0dd7ca 1528 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 1529 PERL_FPU_POST_EXEC
a0f2c8ec 1530 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
15db3ae2 1531 Safefree(buf);
a687059c
LW
1532 return FALSE;
1533 }
1534 }
748a9306 1535
360ea906 1536 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
3280af22
NIS
1537 PL_Cmd = savepvn(cmd, s-cmd);
1538 a = PL_Argv;
1539 for (s = PL_Cmd; *s;) {
294b3b39
AL
1540 while (isSPACE(*s))
1541 s++;
a687059c
LW
1542 if (*s)
1543 *(a++) = s;
294b3b39
AL
1544 while (*s && !isSPACE(*s))
1545 s++;
a687059c
LW
1546 if (*s)
1547 *s++ = '\0';
1548 }
6136c704 1549 *a = NULL;
3280af22 1550 if (PL_Argv[0]) {
b35112e7 1551 PERL_FPU_PRE_EXEC
360ea906 1552 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1553 PERL_FPU_POST_EXEC
b1248f16 1554 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1555 do_execfree();
a687059c 1556 goto doshell;
b1248f16 1557 }
a0f2c8ec 1558 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
a687059c 1559 }
ff8e2863 1560 do_execfree();
15db3ae2 1561 Safefree(buf);
a687059c
LW
1562 return FALSE;
1563}
1564
6890e559 1565#endif /* OS2 || WIN32 */
760ac839 1566
79072805 1567I32
864dbfa3 1568Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1569{
97aff369 1570 dVAR;
79072805 1571 register I32 val;
79072805 1572 register I32 tot = 0;
4634a855 1573 const char *const what = PL_op_name[type];
5c144d81 1574 const char *s;
890ce7af 1575 SV ** const oldmark = mark;
a687059c 1576
7918f24d
NC
1577 PERL_ARGS_ASSERT_APPLY;
1578
1444765e
NC
1579 /* Doing this ahead of the switch statement preserves the old behaviour,
1580 where attempting to use kill as a taint test test would fail on
1581 platforms where kill was not defined. */
1582#ifndef HAS_KILL
1583 if (type == OP_KILL)
4634a855 1584 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1585#endif
1586#ifndef HAS_CHOWN
1587 if (type == OP_CHOWN)
4634a855 1588 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1589#endif
1590
1591
20408e3c 1592#define APPLY_TAINT_PROPER() \
3280af22 1593 STMT_START { \
17406bd6 1594 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1595 } STMT_END
20408e3c
GS
1596
1597 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1598 if (PL_tainting) {
463ee0b2 1599 while (++mark <= sp) {
bbce6d69
PP
1600 if (SvTAINTED(*mark)) {
1601 TAINT;
1602 break;
1603 }
463ee0b2
LW
1604 }
1605 mark = oldmark;
1606 }
a687059c 1607 switch (type) {
79072805 1608 case OP_CHMOD:
20408e3c 1609 APPLY_TAINT_PROPER();
79072805 1610 if (++mark <= sp) {
4ea561bc 1611 val = SvIV(*mark);
20408e3c
GS
1612 APPLY_TAINT_PROPER();
1613 tot = sp - mark;
79072805 1614 while (++mark <= sp) {
c4aca7d0 1615 GV* gv;
6e592b3a 1616 if (isGV_with_GP(*mark)) {
159b6efe 1617 gv = MUTABLE_GV(*mark);
c4aca7d0
GA
1618 do_fchmod:
1619 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1620#ifdef HAS_FCHMOD
1621 APPLY_TAINT_PROPER();
1622 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1623 tot--;
1624#else
b9c6780e 1625 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1626#endif
1627 }
1628 else {
1629 tot--;
1630 }
1631 }
6e592b3a 1632 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) {
159b6efe 1633 gv = MUTABLE_GV(SvRV(*mark));
c4aca7d0
GA
1634 goto do_fchmod;
1635 }
1636 else {
1637 const char *name = SvPV_nolen_const(*mark);
1638 APPLY_TAINT_PROPER();
1639 if (PerlLIO_chmod(name, val))
1640 tot--;
1641 }
a687059c
LW
1642 }
1643 }
1644 break;
fe14fcc3 1645#ifdef HAS_CHOWN
79072805 1646 case OP_CHOWN:
20408e3c 1647 APPLY_TAINT_PROPER();
79072805 1648 if (sp - mark > 2) {
6867be6d 1649 register I32 val2;
463ee0b2
LW
1650 val = SvIVx(*++mark);
1651 val2 = SvIVx(*++mark);
20408e3c 1652 APPLY_TAINT_PROPER();
a0d0e21e 1653 tot = sp - mark;
79072805 1654 while (++mark <= sp) {
c4aca7d0 1655 GV* gv;
6e592b3a 1656 if (isGV_with_GP(*mark)) {
159b6efe 1657 gv = MUTABLE_GV(*mark);
c4aca7d0
GA
1658 do_fchown:
1659 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1660#ifdef HAS_FCHOWN
1661 APPLY_TAINT_PROPER();
1662 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1663 tot--;
1664#else
b9c6780e 1665 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1666#endif
1667 }
1668 else {
1669 tot--;
1670 }
1671 }
6e592b3a 1672 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) {
159b6efe 1673 gv = MUTABLE_GV(SvRV(*mark));
c4aca7d0
GA
1674 goto do_fchown;
1675 }
1676 else {
1677 const char *name = SvPV_nolen_const(*mark);
1678 APPLY_TAINT_PROPER();
1679 if (PerlLIO_chown(name, val, val2))
1680 tot--;
1681 }
a687059c
LW
1682 }
1683 }
1684 break;
b1248f16 1685#endif
a1d180c4 1686/*
dd64f1c3
AD
1687XXX Should we make lchown() directly available from perl?
1688For now, we'll let Configure test for HAS_LCHOWN, but do
1689nothing in the core.
1690 --AD 5/1998
1691*/
fe14fcc3 1692#ifdef HAS_KILL
79072805 1693 case OP_KILL:
20408e3c 1694 APPLY_TAINT_PROPER();
55497cff
PP
1695 if (mark == sp)
1696 break;
e62f0680 1697 s = SvPVx_nolen_const(*++mark);
e02bfb16 1698 if (isALPHA(*s)) {
79072805
LW
1699 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1700 s += 3;
e02bfb16 1701 if ((val = whichsig(s)) < 0)
cea2e8a9 1702 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1703 }
1704 else
4ea561bc 1705 val = SvIV(*mark);
20408e3c
GS
1706 APPLY_TAINT_PROPER();
1707 tot = sp - mark;
3595fcef
PP
1708#ifdef VMS
1709 /* kill() doesn't do process groups (job trees?) under VMS */
1710 if (val < 0) val = -val;
1711 if (val == SIGKILL) {
1712# include <starlet.h>
1713 /* Use native sys$delprc() to insure that target process is
1714 * deleted; supervisor-mode images don't pay attention to
1715 * CRTL's emulation of Unix-style signals and kill()
1716 */
1717 while (++mark <= sp) {
5f521955
JH
1718 I32 proc;
1719 register unsigned long int __vmssts;
8af710eb 1720 SvGETMAGIC(*mark);
e2c0f81f
DG
1721 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1722 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1723 proc = SvIV_nomg(*mark);
20408e3c 1724 APPLY_TAINT_PROPER();
3595fcef
PP
1725 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1726 tot--;
1727 switch (__vmssts) {
1728 case SS$_NONEXPR:
1729 case SS$_NOSUCHNODE:
1730 SETERRNO(ESRCH,__vmssts);
1731 break;
1732 case SS$_NOPRIV:
1733 SETERRNO(EPERM,__vmssts);
1734 break;
1735 default:
1736 SETERRNO(EVMSERR,__vmssts);
1737 }
1738 }
1739 }
8165faea 1740 PERL_ASYNC_CHECK();
3595fcef
PP
1741 break;
1742 }
1743#endif
79072805
LW
1744 if (val < 0) {
1745 val = -val;
1746 while (++mark <= sp) {
5f521955 1747 I32 proc;
8af710eb 1748 SvGETMAGIC(*mark);
e2c0f81f
DG
1749 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1750 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1751 proc = SvIV_nomg(*mark);
20408e3c 1752 APPLY_TAINT_PROPER();
fe14fcc3 1753#ifdef HAS_KILLPG
3028581b 1754 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1755#else
3028581b 1756 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1757#endif
79072805 1758 tot--;
a687059c 1759 }
79072805
LW
1760 }
1761 else {
1762 while (++mark <= sp) {
5f521955 1763 I32 proc;
8af710eb 1764 SvGETMAGIC(*mark);
e2c0f81f
DG
1765 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1766 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1767 proc = SvIV_nomg(*mark);
20408e3c
GS
1768 APPLY_TAINT_PROPER();
1769 if (PerlProc_kill(proc, val))
79072805 1770 tot--;
a687059c
LW
1771 }
1772 }
8165faea 1773 PERL_ASYNC_CHECK();
a687059c 1774 break;
b1248f16 1775#endif
79072805 1776 case OP_UNLINK:
20408e3c 1777 APPLY_TAINT_PROPER();
79072805
LW
1778 tot = sp - mark;
1779 while (++mark <= sp) {
e62f0680 1780 s = SvPV_nolen_const(*mark);
20408e3c 1781 APPLY_TAINT_PROPER();
3280af22 1782 if (PL_euid || PL_unsafe) {
b8ffc8df 1783 if (UNLINK(s))
a687059c
LW
1784 tot--;
1785 }
1786 else { /* don't let root wipe out directories without -U */
3280af22 1787 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1788 tot--;
1789 else {
b8ffc8df 1790 if (UNLINK(s))
a687059c
LW
1791 tot--;
1792 }
1793 }
1794 }
1795 break;
e96b369d 1796#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1797 case OP_UTIME:
20408e3c 1798 APPLY_TAINT_PROPER();
79072805 1799 if (sp - mark > 2) {
e96b369d
GA
1800#if defined(HAS_FUTIMES)
1801 struct timeval utbuf[2];
1802 void *utbufp = utbuf;
1803#elif defined(I_UTIME) || defined(VMS)
663a0e37 1804 struct utimbuf utbuf;
07409e01 1805 struct utimbuf *utbufp = &utbuf;
663a0e37 1806#else
a687059c 1807 struct {
dd2821f6
GS
1808 Time_t actime;
1809 Time_t modtime;
a687059c 1810 } utbuf;
07409e01 1811 void *utbufp = &utbuf;
663a0e37 1812#endif
a687059c 1813
0bcc34c2
AL
1814 SV* const accessed = *++mark;
1815 SV* const modified = *++mark;
c6f7b413 1816
6ec06612
SB
1817 /* Be like C, and if both times are undefined, let the C
1818 * library figure out what to do. This usually means
1819 * "current time". */
c6f7b413
RS
1820
1821 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1822 utbufp = NULL;
1823 else {
1824 Zero(&utbuf, sizeof utbuf, char);
e96b369d 1825#ifdef HAS_FUTIMES
4ea561bc 1826 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 1827 utbuf[0].tv_usec = 0;
4ea561bc 1828 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA
1829 utbuf[1].tv_usec = 0;
1830#elif defined(BIG_TIME)
4ea561bc
NC
1831 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1832 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 1833#else
4ea561bc
NC
1834 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1835 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 1836#endif
6ec06612 1837 }
4373e329 1838 APPLY_TAINT_PROPER();
79072805
LW
1839 tot = sp - mark;
1840 while (++mark <= sp) {
e96b369d 1841 GV* gv;
6e592b3a 1842 if (isGV_with_GP(*mark)) {
159b6efe 1843 gv = MUTABLE_GV(*mark);
e96b369d
GA
1844 do_futimes:
1845 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1846#ifdef HAS_FUTIMES
1847 APPLY_TAINT_PROPER();
8b7231d9
SP
1848 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1849 (struct timeval *) utbufp))
e96b369d
GA
1850 tot--;
1851#else
1852 Perl_die(aTHX_ PL_no_func, "futimes");
1853#endif
1854 }
1855 else {
1856 tot--;
1857 }
1858 }
6e592b3a 1859 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) {
159b6efe 1860 gv = MUTABLE_GV(SvRV(*mark));
e96b369d
GA
1861 goto do_futimes;
1862 }
1863 else {
0bcc34c2 1864 const char * const name = SvPV_nolen_const(*mark);
e96b369d
GA
1865 APPLY_TAINT_PROPER();
1866#ifdef HAS_FUTIMES
8b7231d9 1867 if (utimes(name, (struct timeval *)utbufp))
e96b369d
GA
1868#else
1869 if (PerlLIO_utime(name, utbufp))
1870#endif
1871 tot--;
1872 }
1873
a687059c 1874 }
a687059c
LW
1875 }
1876 else
79072805 1877 tot = 0;
a687059c 1878 break;
a0d0e21e 1879#endif
a687059c
LW
1880 }
1881 return tot;
20408e3c 1882
20408e3c 1883#undef APPLY_TAINT_PROPER
a687059c
LW
1884}
1885
1886/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1887#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1888bool
ae1951c1
NC
1889Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1890/* effective is a flag, true for EUID, or for checking if the effective gid
1891 * is in the list of groups returned from getgroups().
1892 */
a687059c 1893{
97aff369 1894 dVAR;
7918f24d
NC
1895
1896 PERL_ARGS_ASSERT_CANDO;
1897
bee1dbe2 1898#ifdef DOSISH
fe14fcc3
LW
1899 /* [Comments and code from Len Reed]
1900 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1901 * to write-protected files. The execute permission bit is set
1902 * by the Miscrosoft C library stat() function for the following:
1903 * .exe files
1904 * .com files
1905 * .bat files
1906 * directories
1907 * All files and directories are readable.
1908 * Directories and special files, e.g. "CON", cannot be
1909 * write-protected.
1910 * [Comment by Tom Dinger -- a directory can have the write-protect
1911 * bit set in the file system, but DOS permits changes to
1912 * the directory anyway. In addition, all bets are off
1913 * here for networked software, such as Novell and
1914 * Sun's PC-NFS.]
1915 */
1916
bee1dbe2
LW
1917 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1918 * too so it will actually look into the files for magic numbers
1919 */
7f4774ae 1920 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1921
55497cff 1922#else /* ! DOSISH */
b595cd4b
RU
1923# ifdef __CYGWIN__
1924 if (ingroup(544,effective)) { /* member of Administrators */
1925# else
3280af22 1926 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
b595cd4b 1927# endif
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
1f676739 1951static bool
0da8eb3a 1952S_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 1953{
97aff369 1954 dVAR;
3280af22 1955 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1956 return TRUE;
fe14fcc3 1957#ifdef HAS_GETGROUPS
a687059c 1958 {
331b57bc 1959 Groups_t *gary = NULL;
79072805 1960 I32 anum;
331b57bc 1961 bool rc = FALSE;
a687059c 1962
331b57bc
SP
1963 anum = getgroups(0, gary);
1964 Newx(gary, anum, Groups_t);
1965 anum = getgroups(anum, gary);
a687059c 1966 while (--anum >= 0)
331b57bc
SP
1967 if (gary[anum] == testgid) {
1968 rc = TRUE;
1969 break;
1970 }
1971
1972 Safefree(gary);
1973 return rc;
a687059c 1974 }
c685562b 1975#else
a687059c 1976 return FALSE;
cd39f2b6 1977#endif
a687059c 1978}
c2ab57d4 1979
fe14fcc3 1980#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1981
79072805 1982I32
864dbfa3 1983Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1984{
97aff369 1985 dVAR;
0bcc34c2 1986 const key_t key = (key_t)SvNVx(*++mark);
c3312966 1987 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
6867be6d 1988 const I32 flags = SvIVx(*++mark);
294a48e9 1989
7918f24d 1990 PERL_ARGS_ASSERT_DO_IPCGET;
294a48e9 1991 PERL_UNUSED_ARG(sp);
c2ab57d4 1992
748a9306 1993 SETERRNO(0,0);
c2ab57d4
LW
1994 switch (optype)
1995 {
fe14fcc3 1996#ifdef HAS_MSG
79072805 1997 case OP_MSGGET:
c2ab57d4 1998 return msgget(key, flags);
e5d73d77 1999#endif
fe14fcc3 2000#ifdef HAS_SEM
79072805 2001 case OP_SEMGET:
c3312966 2002 return semget(key, (int) SvIV(nsv), flags);
e5d73d77 2003#endif
fe14fcc3 2004#ifdef HAS_SHM
79072805 2005 case OP_SHMGET:
c3312966 2006 return shmget(key, (size_t) SvUV(nsv), flags);
e5d73d77 2007#endif
fe14fcc3 2008#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2009 default:
fe13d51d 2010 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2011 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2012#endif
c2ab57d4
LW
2013 }
2014 return -1; /* should never happen */
2015}
2016
79072805 2017I32
864dbfa3 2018Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2019{
97aff369 2020 dVAR;
c2ab57d4 2021 char *a;
a0d0e21e 2022 I32 ret = -1;
6867be6d 2023 const I32 id = SvIVx(*++mark);
95b63a38 2024#ifdef Semctl
6867be6d 2025 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2026#endif
6867be6d 2027 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
2028 SV * const astr = *++mark;
2029 STRLEN infosize = 0;
2030 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2031
7918f24d 2032 PERL_ARGS_ASSERT_DO_IPCCTL;
0bcc34c2 2033 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
2034
2035 switch (optype)
2036 {
fe14fcc3 2037#ifdef HAS_MSG
79072805 2038 case OP_MSGCTL:
c2ab57d4
LW
2039 if (cmd == IPC_STAT || cmd == IPC_SET)
2040 infosize = sizeof(struct msqid_ds);
2041 break;
e5d73d77 2042#endif
fe14fcc3 2043#ifdef HAS_SHM
79072805 2044 case OP_SHMCTL:
c2ab57d4
LW
2045 if (cmd == IPC_STAT || cmd == IPC_SET)
2046 infosize = sizeof(struct shmid_ds);
2047 break;
e5d73d77 2048#endif
fe14fcc3 2049#ifdef HAS_SEM
79072805 2050 case OP_SEMCTL:
39398f3f 2051#ifdef Semctl
c2ab57d4
LW
2052 if (cmd == IPC_STAT || cmd == IPC_SET)
2053 infosize = sizeof(struct semid_ds);
2054 else if (cmd == GETALL || cmd == SETALL)
2055 {
8e591e46 2056 struct semid_ds semds;
bd89102f 2057 union semun semun;
e6f0bdd6
GS
2058#ifdef EXTRA_F_IN_SEMUN_BUF
2059 semun.buff = &semds;
2060#else
84902520 2061 semun.buf = &semds;
e6f0bdd6 2062#endif
c2ab57d4 2063 getinfo = (cmd == GETALL);
9b89d93d
GB
2064 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2065 return -1;
6e21c824
LW
2066 infosize = semds.sem_nsems * sizeof(short);
2067 /* "short" is technically wrong but much more portable
2068 than guessing about u_?short(_t)? */
c2ab57d4 2069 }
39398f3f 2070#else
fe13d51d 2071 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2072 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2073#endif
c2ab57d4 2074 break;
e5d73d77 2075#endif
fe14fcc3 2076#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2077 default:
fe13d51d 2078 /* diag_listed_as: shm%s not implemented */
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
fe13d51d 2126 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2127 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2128#endif
bd89102f 2129 }
c2ab57d4 2130 break;
e5d73d77 2131#endif
fe14fcc3 2132#ifdef HAS_SHM
79072805 2133 case OP_SHMCTL:
bee1dbe2 2134 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2135 break;
e5d73d77 2136#endif
c2ab57d4
LW
2137 }
2138 if (getinfo && ret >= 0) {
79072805
LW
2139 SvCUR_set(astr, infosize);
2140 *SvEND(astr) = '\0';
a0d0e21e 2141 SvSETMAGIC(astr);
c2ab57d4
LW
2142 }
2143 return ret;
2144}
2145
79072805 2146I32
864dbfa3 2147Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2148{
97aff369 2149 dVAR;
fe14fcc3 2150#ifdef HAS_MSG
463ee0b2 2151 STRLEN len;
6867be6d 2152 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2153 SV * const mstr = *++mark;
2154 const I32 flags = SvIVx(*++mark);
2155 const char * const mbuf = SvPV_const(mstr, len);
2156 const I32 msize = len - sizeof(long);
2157
7918f24d 2158 PERL_ARGS_ASSERT_DO_MSGSND;
890ce7af 2159 PERL_UNUSED_ARG(sp);
c2ab57d4 2160
0bcc34c2 2161 if (msize < 0)
cea2e8a9 2162 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2163 SETERRNO(0,0);
bee1dbe2 2164 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2165#else
2d51fa4d
RGS
2166 PERL_UNUSED_ARG(sp);
2167 PERL_UNUSED_ARG(mark);
fe13d51d 2168 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2169 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2170#endif
c2ab57d4
LW
2171}
2172
79072805 2173I32
864dbfa3 2174Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2175{
fe14fcc3 2176#ifdef HAS_MSG
97aff369 2177 dVAR;
c2ab57d4
LW
2178 char *mbuf;
2179 long mtype;
6867be6d 2180 I32 msize, flags, ret;
6867be6d 2181 const I32 id = SvIVx(*++mark);
0bcc34c2 2182 SV * const mstr = *++mark;
7918f24d
NC
2183
2184 PERL_ARGS_ASSERT_DO_MSGRCV;
890ce7af 2185 PERL_UNUSED_ARG(sp);
79072805 2186
c2e66d9e
GS
2187 /* suppress warning when reading into undef var --jhi */
2188 if (! SvOK(mstr))
76f68e9b 2189 sv_setpvs(mstr, "");
463ee0b2
LW
2190 msize = SvIVx(*++mark);
2191 mtype = (long)SvIVx(*++mark);
2192 flags = SvIVx(*++mark);
93524f2b 2193 SvPV_force_nolen(mstr);
a0d0e21e 2194 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2195
748a9306 2196 SETERRNO(0,0);
bee1dbe2 2197 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2198 if (ret >= 0) {
79072805
LW
2199 SvCUR_set(mstr, sizeof(long)+ret);
2200 *SvEND(mstr) = '\0';
41d6edb2
JH
2201#ifndef INCOMPLETE_TAINTS
2202 /* who knows who has been playing with this message? */
2203 SvTAINTED_on(mstr);
2204#endif
c2ab57d4
LW
2205 }
2206 return ret;
e5d73d77 2207#else
2d51fa4d
RGS
2208 PERL_UNUSED_ARG(sp);
2209 PERL_UNUSED_ARG(mark);
fe13d51d 2210 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2211 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2212#endif
c2ab57d4
LW
2213}
2214
79072805 2215I32
864dbfa3 2216Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2217{
fe14fcc3 2218#ifdef HAS_SEM
97aff369 2219 dVAR;
463ee0b2 2220 STRLEN opsize;
6867be6d 2221 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2222 SV * const opstr = *++mark;
2223 const char * const opbuf = SvPV_const(opstr, opsize);
7918f24d
NC
2224
2225 PERL_ARGS_ASSERT_DO_SEMOP;
890ce7af 2226 PERL_UNUSED_ARG(sp);
c2ab57d4 2227
248ff010
NC
2228 if (opsize < 3 * SHORTSIZE
2229 || (opsize % (3 * SHORTSIZE))) {
93189314 2230 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2231 return -1;
2232 }
748a9306 2233 SETERRNO(0,0);
248ff010
NC
2234 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2235 {
6867be6d 2236 const int nsops = opsize / (3 * sizeof (short));
248ff010 2237 int i = nsops;
0bcc34c2 2238 short * const ops = (short *) opbuf;
248ff010
NC
2239 short *o = ops;
2240 struct sembuf *temps, *t;
2241 I32 result;
2242
a02a5408 2243 Newx (temps, nsops, struct sembuf);
248ff010
NC
2244 t = temps;
2245 while (i--) {
2246 t->sem_num = *o++;
2247 t->sem_op = *o++;
2248 t->sem_flg = *o++;
2249 t++;
2250 }
2251 result = semop(id, temps, nsops);
2252 t = temps;
2253 o = ops;
2254 i = nsops;
2255 while (i--) {
2256 *o++ = t->sem_num;
2257 *o++ = t->sem_op;
2258 *o++ = t->sem_flg;
2259 t++;
2260 }
2261 Safefree(temps);
2262 return result;
2263 }
e5d73d77 2264#else
fe13d51d 2265 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2266 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2267#endif
c2ab57d4
LW
2268}
2269
79072805 2270I32
864dbfa3 2271Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2272{
fe14fcc3 2273#ifdef HAS_SHM
97aff369 2274 dVAR;
4373e329 2275 char *shm;
c2ab57d4 2276 struct shmid_ds shmds;
6867be6d 2277 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2278 SV * const mstr = *++mark;
2279 const I32 mpos = SvIVx(*++mark);
2280 const I32 msize = SvIVx(*++mark);
7918f24d
NC
2281
2282 PERL_ARGS_ASSERT_DO_SHMIO;
890ce7af 2283 PERL_UNUSED_ARG(sp);
c2ab57d4 2284
748a9306 2285 SETERRNO(0,0);
c2ab57d4
LW
2286 if (shmctl(id, IPC_STAT, &shmds) == -1)
2287 return -1;
7f39519f
NC
2288 if (mpos < 0 || msize < 0
2289 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
93189314 2290 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2291 return -1;
2292 }
d4c19fe8 2293 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2294 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2295 return -1;
79072805 2296 if (optype == OP_SHMREAD) {
c8ae91a8 2297 char *mbuf;
9f538c04
GS
2298 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2299 if (! SvOK(mstr))
76f68e9b 2300 sv_setpvs(mstr, "");
93524f2b 2301 SvPV_force_nolen(mstr);
bb7a0f54 2302 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2303
bee1dbe2 2304 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2305 SvCUR_set(mstr, msize);
2306 *SvEND(mstr) = '\0';
a0d0e21e 2307 SvSETMAGIC(mstr);
d929ce6f
JH
2308#ifndef INCOMPLETE_TAINTS
2309 /* who knows who has been playing with this shared memory? */
2310 SvTAINTED_on(mstr);
2311#endif
c2ab57d4
LW
2312 }
2313 else {
93524f2b 2314 STRLEN len;
c2ab57d4 2315
93524f2b 2316 const char *mbuf = SvPV_const(mstr, len);
027aa12d 2317 const I32 n = ((I32)len > msize) ? msize : (I32)len;
bee1dbe2 2318 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2319 if (n < msize)
bee1dbe2 2320 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2321 }
2322 return shmdt(shm);
e5d73d77 2323#else
fe13d51d 2324 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2325 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2326#endif
c2ab57d4
LW
2327}
2328
fe14fcc3 2329#endif /* SYSV IPC */
4e35701f 2330
0d44d22b 2331/*
ccfc67b7
JH
2332=head1 IO Functions
2333
0d44d22b
NC
2334=for apidoc start_glob
2335
2336Function called by C<do_readline> to spawn a glob (or do the glob inside
2337perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2338this glob starter is only used by miniperl during the build process.
0d44d22b 2339Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2340
0d44d22b
NC
2341=cut
2342*/
2343
2344PerlIO *
2345Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2346{
27da23d5 2347 dVAR;
561b68a9 2348 SV * const tmpcmd = newSV(0);
0d44d22b 2349 PerlIO *fp;
7918f24d
NC
2350
2351 PERL_ARGS_ASSERT_START_GLOB;
2352
0d44d22b
NC
2353 ENTER;
2354 SAVEFREESV(tmpcmd);
2355#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2356 /* since spawning off a process is a real performance hit */
dca5a913
JM
2357
2358PerlIO *
2359Perl_vms_start_glob
2360 (pTHX_ SV *tmpglob,
2361 IO *io);
2362
49a7a762 2363 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2364
0d44d22b 2365#else /* !VMS */
0d44d22b
NC
2366#ifdef DOSISH
2367#ifdef OS2
2368 sv_setpv(tmpcmd, "for a in ");
2369 sv_catsv(tmpcmd, tmpglob);
2370 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2371#else
2372#ifdef DJGPP
2373 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2374 sv_catsv(tmpcmd, tmpglob);
2375#else
2376 sv_setpv(tmpcmd, "perlglob ");
2377 sv_catsv(tmpcmd, tmpglob);
2378 sv_catpv(tmpcmd, " |");
2379#endif /* !DJGPP */
2380#endif /* !OS2 */
2381#else /* !DOSISH */
2382#if defined(CSH)
2383 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2384 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2385 sv_catsv(tmpcmd, tmpglob);
2386 sv_catpv(tmpcmd, "' 2>/dev/null |");
2387#else
2388 sv_setpv(tmpcmd, "echo ");
2389 sv_catsv(tmpcmd, tmpglob);
2390#if 'z' - 'a' == 25
2391 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2392#else
2393 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2394#endif
2395#endif /* !CSH */
2396#endif /* !DOSISH */
93524f2b 2397 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
4608196e 2398 FALSE, O_RDONLY, 0, NULL);
0d44d22b
NC
2399 fp = IoIFP(io);
2400#endif /* !VMS */
2401 LEAVE;
2402 return fp;
2403}
66610fdd
RGS
2404
2405/*
2406 * Local variables:
2407 * c-indentation-style: bsd
2408 * c-basic-offset: 4
2409 * indent-tabs-mode: t
2410 * End:
2411 *
37442d52
RGS
2412 * ex: set ts=8 sts=4 sw=4 noet:
2413 */