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Make filetest ops handle get-magic correctly for glob(ref)s
[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
b28d0864 864 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
a687059c 865#endif
3280af22 866 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 867#ifdef HAS_FCHOWN
3280af22 868 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 869#else
fe14fcc3 870#ifdef HAS_CHOWN
b28d0864 871 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 872#endif
b1248f16 873#endif
fe14fcc3 874 }
a687059c 875 }
a0d0e21e 876 return IoIFP(GvIOp(gv));
a687059c 877 }
4d61ec05 878 else {
4d61ec05 879 if (ckWARN_d(WARN_INPLACE)) {
4373e329 880 const int eno = errno;
6af84f9f
GS
881 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
882 && !S_ISREG(PL_statbuf.st_mode))
883 {
9014280d 884 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
4d61ec05 885 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 886 PL_oldname);
6af84f9f 887 }
4d61ec05 888 else
9014280d 889 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
6af84f9f 890 PL_oldname, Strerror(eno));
4d61ec05
GS
891 }
892 }
a687059c 893 }
18708f5a
GS
894 if (io && (IoFLAGS(io) & IOf_ARGV))
895 IoFLAGS(io) |= IOf_START;
3280af22
NIS
896 if (PL_inplace) {
897 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
898 if (io && (IoFLAGS(io) & IOf_ARGV)
899 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
900 {
159b6efe 901 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
18708f5a
GS
902 setdefout(oldout);
903 SvREFCNT_dec(oldout);
4608196e 904 return NULL;
18708f5a 905 }
fafc274c 906 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 907 }
4608196e 908 return NULL;
a687059c
LW
909}
910
517844ec 911/* explicit renamed to avoid C++ conflict -- kja */
a687059c 912bool
864dbfa3 913Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 914{
97aff369 915 dVAR;
1193dd27
IZ
916 bool retval;
917 IO *io;
a687059c 918
79072805 919 if (!gv)
3280af22 920 gv = PL_argvgv;
6e592b3a 921 if (!gv || !isGV_with_GP(gv)) {
1d2dff63 922 if (not_implicit)
93189314 923 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 924 return FALSE;
99b89507 925 }
79072805
LW
926 io = GvIO(gv);
927 if (!io) { /* never opened */
1d2dff63 928 if (not_implicit) {
51087808 929 report_evil_fh(gv);
93189314 930 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 931 }
a687059c
LW
932 return FALSE;
933 }
f2b5be74 934 retval = io_close(io, not_implicit);
517844ec 935 if (not_implicit) {
1193dd27
IZ
936 IoLINES(io) = 0;
937 IoPAGE(io) = 0;
938 IoLINES_LEFT(io) = IoPAGE_LEN(io);
939 }
50952442 940 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
941 return retval;
942}
943
944bool
f2b5be74 945Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27 946{
97aff369 947 dVAR;
1193dd27 948 bool retval = FALSE;
1193dd27 949
7918f24d
NC
950 PERL_ARGS_ASSERT_IO_CLOSE;
951
8990e307 952 if (IoIFP(io)) {
50952442 953 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 954 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 955 if (not_implicit) {
37038d91 956 STATUS_NATIVE_CHILD_SET(status);
e5218da5 957 retval = (STATUS_UNIX == 0);
f2b5be74
GS
958 }
959 else {
960 retval = (status != -1);
961 }
a687059c 962 }
50952442 963 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
964 retval = TRUE;
965 else {
8990e307 966 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 967 const bool prev_err = PerlIO_error(IoOFP(io));
e199e3be 968 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 969 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 970 }
e199e3be 971 else {
0bcc34c2 972 const bool prev_err = PerlIO_error(IoIFP(io));
e199e3be
RGS
973 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
974 }
a687059c 975 }
4608196e 976 IoOFP(io) = IoIFP(io) = NULL;
79072805 977 }
f2b5be74 978 else if (not_implicit) {
93189314 979 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 980 }
1193dd27 981
a687059c
LW
982 return retval;
983}
984
985bool
864dbfa3 986Perl_do_eof(pTHX_ GV *gv)
a687059c 987{
97aff369 988 dVAR;
0bcc34c2 989 register IO * const io = GvIO(gv);
a687059c 990
7918f24d
NC
991 PERL_ARGS_ASSERT_DO_EOF;
992
79072805 993 if (!io)
a687059c 994 return TRUE;
7716c5c5 995 else if (IoTYPE(io) == IoTYPE_WRONLY)
a5390457 996 report_wrongway_fh(gv, '>');
a687059c 997
8990e307 998 while (IoIFP(io)) {
760ac839 999 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1000 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1001 return FALSE; /* this is the most usual case */
1002 }
a687059c 1003
79852593
NC
1004 {
1005 /* getc and ungetc can stomp on errno */
4ee39169 1006 dSAVE_ERRNO;
79852593
NC
1007 const int ch = PerlIO_getc(IoIFP(io));
1008 if (ch != EOF) {
1009 (void)PerlIO_ungetc(IoIFP(io),ch);
4ee39169 1010 RESTORE_ERRNO;
79852593
NC
1011 return FALSE;
1012 }
4ee39169 1013 RESTORE_ERRNO;
a687059c 1014 }
fab3f3a7 1015
760ac839 1016 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1017 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1018 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1019 }
533c011a 1020 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1021 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1022 return TRUE;
1023 }
1024 else
1025 return TRUE; /* normal fp, definitely end of file */
1026 }
1027 return TRUE;
1028}
1029
5ff3f7a4 1030Off_t
864dbfa3 1031Perl_do_tell(pTHX_ GV *gv)
a687059c 1032{
97aff369 1033 dVAR;
9c9f25b8 1034 IO *const io = GvIO(gv);
96e4d5b1 1035 register PerlIO *fp;
a687059c 1036
7918f24d
NC
1037 PERL_ARGS_ASSERT_DO_TELL;
1038
9c9f25b8 1039 if (io && (fp = IoIFP(io))) {
bee1dbe2 1040#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1041 if (PerlIO_eof(fp))
1042 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1043#endif
8903cb82 1044 return PerlIO_tell(fp);
96e4d5b1 1045 }
51087808 1046 report_evil_fh(gv);
93189314 1047 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1048 return (Off_t)-1;
a687059c
LW
1049}
1050
1051bool
864dbfa3 1052Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1053{
97aff369 1054 dVAR;
9c9f25b8 1055 IO *const io = GvIO(gv);
137443ea 1056 register PerlIO *fp;
a687059c 1057
9c9f25b8 1058 if (io && (fp = IoIFP(io))) {
bee1dbe2 1059#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1060 if (PerlIO_eof(fp))
1061 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1062#endif
8903cb82 1063 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1064 }
51087808 1065 report_evil_fh(gv);
93189314 1066 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1067 return FALSE;
1068}
1069
97cc44eb 1070Off_t
864dbfa3 1071Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1072{
97aff369 1073 dVAR;
9c9f25b8 1074 IO *const io = GvIO(gv);
8903cb82
PP
1075 register PerlIO *fp;
1076
7918f24d
NC
1077 PERL_ARGS_ASSERT_DO_SYSSEEK;
1078
9c9f25b8 1079 if (io && (fp = IoIFP(io)))
3028581b 1080 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
51087808 1081 report_evil_fh(gv);
93189314 1082 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1083 return (Off_t)-1;
8903cb82
PP
1084}
1085
6ff81951 1086int
a79b25b7 1087Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
16fe6d59
GS
1088{
1089 int mode = O_BINARY;
a79b25b7 1090 if (s) {
16fe6d59
GS
1091 while (*s) {
1092 if (*s == ':') {
1093 switch (s[1]) {
1094 case 'r':
e963d6d2 1095 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1096 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1097 {
1098 mode = O_BINARY;
1099 s += 4;
1100 len -= 4;
1101 break;
1102 }
1103 /* FALL THROUGH */
1104 case 'c':
e963d6d2 1105 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1106 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1107 {
1108 mode = O_TEXT;
1109 s += 5;
1110 len -= 5;
1111 break;
1112 }
1113 /* FALL THROUGH */
1114 default:
1115 goto fail_discipline;
1116 }
1117 }
1118 else if (isSPACE(*s)) {
1119 ++s;
1120 --len;
1121 }
1122 else {
4373e329 1123 const char *end;
16fe6d59
GS
1124fail_discipline:
1125 end = strchr(s+1, ':');
1126 if (!end)
1127 end = s+len;
60382766 1128#ifndef PERLIO_LAYERS
363c40c4 1129 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1130#else
18a33fb5 1131 len -= end-s;
60382766
NIS
1132 s = end;
1133#endif
16fe6d59
GS
1134 }
1135 }
1136 }
1137 return mode;
1138}
1139
58e24eff 1140#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1141I32
1142my_chsize(int fd, Off_t length)
6eb13c3b 1143{
58e24eff
SH
1144#ifdef F_FREESP
1145 /* code courtesy of William Kucharski */
1146#define HAS_CHSIZE
1147
c623ac67 1148 Stat_t filebuf;
6eb13c3b 1149
3028581b 1150 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1151 return -1;
1152
1153 if (filebuf.st_size < length) {
1154
1155 /* extend file length */
1156
3028581b 1157 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1158 return -1;
1159
1160 /* write a "0" byte */
1161
3028581b 1162 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1163 return -1;
1164 }
1165 else {
1166 /* truncate length */
35da51f7 1167 struct flock fl;
6eb13c3b
LW
1168 fl.l_whence = 0;
1169 fl.l_len = 0;
1170 fl.l_start = length;
a0d0e21e 1171 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1172
1173 /*
a0d0e21e 1174 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1175 * fcntl(2), which truncates the file so that it ends at the
1176 * position indicated by fl.l_start.
1177 *
1178 * Will minor miracles never cease?
1179 */
1180
a0d0e21e 1181 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1182 return -1;
1183
1184 }
6eb13c3b 1185 return 0;
58e24eff 1186#else
27da23d5 1187 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1188#endif /* F_FREESP */
27da23d5 1189 return -1;
58e24eff
SH
1190}
1191#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1192
a687059c 1193bool
864dbfa3 1194Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1195{
97aff369 1196 dVAR;
7918f24d
NC
1197
1198 PERL_ARGS_ASSERT_DO_PRINT;
1199
79072805
LW
1200 /* assuming fp is checked earlier */
1201 if (!sv)
1202 return TRUE;
e9950d3b
NC
1203 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1204 assert(!SvGMAGICAL(sv));
1205 if (SvIsUV(sv))
1206 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1207 else
1208 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1209 return !PerlIO_error(fp);
1210 }
1211 else {
1212 STRLEN len;
676f44e7 1213 /* Do this first to trigger any overloading. */
e9950d3b
NC
1214 const char *tmps = SvPV_const(sv, len);
1215 U8 *tmpbuf = NULL;
1216 bool happy = TRUE;
1217
7d59b7e4 1218 if (PerlIO_isutf8(fp)) {
676f44e7
NC
1219 if (!SvUTF8(sv)) {
1220 /* We don't modify the original scalar. */
1221 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1222 tmps = (char *) tmpbuf;
1223 }
0876b9a0
KW
1224 else if (ckWARN_d(WARN_UTF8)) {
1225 (void) check_utf8_print((const U8*) tmps, len);
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 );
0876b9a0
KW
1243 /* Could also check that isn't one of the things to avoid
1244 * in utf8 by using check_utf8_print(), but not doing so,
1245 * since the stream isn't a UTF8 stream */
ae798467
NIS
1246 }
1247 }
e9950d3b
NC
1248 /* To detect whether the process is about to overstep its
1249 * filesize limit we would need getrlimit(). We could then
1250 * also transparently raise the limit with setrlimit() --
1251 * but only until the system hard limit/the filesystem limit,
1252 * at which we would get EPERM. Note that when using buffered
1253 * io the write failure can be delayed until the flush/close. --jhi */
1254 if (len && (PerlIO_write(fp,tmps,len) == 0))
1255 happy = FALSE;
1256 Safefree(tmpbuf);
1257 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 1258 }
a687059c
LW
1259}
1260
79072805 1261I32
0d7d409d 1262Perl_my_stat_flags(pTHX_ const U32 flags)
a687059c 1263{
97aff369 1264 dVAR;
39644a26 1265 dSP;
79072805 1266 IO *io;
2dd78f96 1267 GV* gv;
79072805 1268
533c011a 1269 if (PL_op->op_flags & OPf_REF) {
924508f0 1270 EXTEND(SP,1);
2dd78f96 1271 gv = cGVOP_gv;
748a9306 1272 do_fstat:
5228a96c
SP
1273 if (gv == PL_defgv)
1274 return PL_laststatval;
2dd78f96 1275 io = GvIO(gv);
ad02613c 1276 do_fstat_have_io:
5228a96c
SP
1277 PL_laststype = OP_STAT;
1278 PL_statgv = gv;
76f68e9b 1279 sv_setpvs(PL_statname, "");
5228a96c
SP
1280 if(io) {
1281 if (IoIFP(io)) {
1282 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1283 } else if (IoDIRP(io)) {
3497a01f 1284 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c 1285 } else {
51087808 1286 report_evil_fh(gv);
5228a96c
SP
1287 return (PL_laststatval = -1);
1288 }
1289 } else {
51087808 1290 report_evil_fh(gv);
5228a96c
SP
1291 return (PL_laststatval = -1);
1292 }
a687059c 1293 }
fbb0b3b3
RGS
1294 else if (PL_op->op_private & OPpFT_STACKED) {
1295 return PL_laststatval;
1296 }
a687059c 1297 else {
0bcc34c2 1298 SV* const sv = POPs;
4373e329 1299 const char *s;
4ecd490c 1300 STRLEN len;
79072805 1301 PUTBACK;
094a3eec 1302 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
748a9306
LW
1303 goto do_fstat;
1304 }
ad02613c 1305 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
a45c7426 1306 io = MUTABLE_IO(SvRV(sv));
7f39519f 1307 gv = NULL;
ad02613c
SP
1308 goto do_fstat_have_io;
1309 }
748a9306 1310
0d7d409d 1311 s = SvPV_flags_const(sv, len, flags);
a0714e2c 1312 PL_statgv = NULL;
4ecd490c 1313 sv_setpvn(PL_statname, s, len);
95a20fc0 1314 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1315 PL_laststype = OP_STAT;
1316 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1317 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1318 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1319 return PL_laststatval;
a687059c
LW
1320 }
1321}
1322
fbb0b3b3 1323
79072805 1324I32
0d7d409d 1325Perl_my_lstat_flags(pTHX_ const U32 flags)
c623bd54 1326{
97aff369 1327 dVAR;
0bd48802 1328 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1329 dSP;
79072805 1330 SV *sv;
b16276bb 1331 const char *file;
533c011a 1332 if (PL_op->op_flags & OPf_REF) {
924508f0 1333 EXTEND(SP,1);
638eceb6 1334 if (cGVOP_gv == PL_defgv) {
3280af22 1335 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1336 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1337 return PL_laststatval;
fe14fcc3 1338 }
5d3e98de 1339 if (ckWARN(WARN_IO)) {
9014280d 1340 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de 1341 GvENAME(cGVOP_gv));
5d3e98de 1342 }
ca867162 1343 return (PL_laststatval = -1);
fe14fcc3 1344 }
041457d9
DM
1345 else if (PL_laststype != OP_LSTAT
1346 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
fbb0b3b3 1347 Perl_croak(aTHX_ no_prev_lstat);
c623bd54 1348
3280af22 1349 PL_laststype = OP_LSTAT;
a0714e2c 1350 PL_statgv = NULL;
79072805
LW
1351 sv = POPs;
1352 PUTBACK;
6e592b3a 1353 if (SvROK(sv) && isGV_with_GP(SvRV(sv)) && ckWARN(WARN_IO)) {
9014280d 1354 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
159b6efe 1355 GvENAME((const GV *)SvRV(sv)));
5d3e98de
RGS
1356 return (PL_laststatval = -1);
1357 }
0d7d409d 1358 file = SvPV_flags_const_nolen(sv, flags);
b16276bb
VP
1359 sv_setpv(PL_statname,file);
1360 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1361 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
9014280d 1362 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1363 return PL_laststatval;
c623bd54
LW
1364}
1365
a0f2c8ec
JD
1366static void
1367S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1368{
1369 const int e = errno;
7918f24d 1370 PERL_ARGS_ASSERT_EXEC_FAILED;
a0f2c8ec
JD
1371 if (ckWARN(WARN_EXEC))
1372 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1373 cmd, Strerror(e));
1374 if (do_report) {
1375 PerlLIO_write(fd, (void*)&e, sizeof(int));
1376 PerlLIO_close(fd);
1377 }
1378}
1379
d5a9bfb0 1380bool
2aa1486d
GS
1381Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1382 int fd, int do_report)
d5a9bfb0 1383{
27da23d5 1384 dVAR;
7918f24d 1385 PERL_ARGS_ASSERT_DO_AEXEC5;
e37778c2 1386#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH
1387 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1388#else
79072805 1389 if (sp > mark) {
360ea906 1390 const char **a;
6136c704 1391 const char *tmps = NULL;
360ea906 1392 Newx(PL_Argv, sp - mark + 1, const char*);
c3c5fad7 1393 a = PL_Argv;
890ce7af 1394
79072805
LW
1395 while (++mark <= sp) {
1396 if (*mark)
360ea906 1397 *a++ = SvPV_nolen_const(*mark);
a687059c
LW
1398 else
1399 *a++ = "";
1400 }
6136c704 1401 *a = NULL;
91b2752f 1402 if (really)
e62f0680 1403 tmps = SvPV_nolen_const(really);
91b2752f
RG
1404 if ((!really && *PL_Argv[0] != '/') ||
1405 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1406 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1407 PERL_FPU_PRE_EXEC
91b2752f 1408 if (really && *tmps)
b4748376 1409 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1410 else
b4748376 1411 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1412 PERL_FPU_POST_EXEC
a0f2c8ec 1413 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
a687059c 1414 }
bee1dbe2 1415 do_execfree();
cd39f2b6 1416#endif
a687059c
LW
1417 return FALSE;
1418}
1419
fe14fcc3 1420void
864dbfa3 1421Perl_do_execfree(pTHX)
ff8e2863 1422{
97aff369 1423 dVAR;
43c5f42d 1424 Safefree(PL_Argv);
4608196e 1425 PL_Argv = NULL;
43c5f42d 1426 Safefree(PL_Cmd);
bd61b366 1427 PL_Cmd = NULL;
ff8e2863
LW
1428}
1429
9555a685 1430#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1431
1432bool
2fbb330f 1433Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1434{
27da23d5 1435 dVAR;
360ea906 1436 register const char **a;
a687059c 1437 register char *s;
15db3ae2 1438 char *buf;
2fbb330f 1439 char *cmd;
2fbb330f 1440 /* Make a copy so we can change it */
6fca0082 1441 const Size_t cmdlen = strlen(incmd) + 1;
7918f24d
NC
1442
1443 PERL_ARGS_ASSERT_DO_EXEC3;
1444
15db3ae2
DM
1445 Newx(buf, cmdlen, char);
1446 cmd = buf;
cfff9797 1447 memcpy(cmd, incmd, cmdlen);
a687059c 1448
748a9306
LW
1449 while (*cmd && isSPACE(*cmd))
1450 cmd++;
1451
a687059c
LW
1452 /* save an extra exec if possible */
1453
bf38876a 1454#ifdef CSH
d05c1ba0 1455 {
0c19750d 1456 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1457 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1458 strnEQ(cmd+PL_cshlen," -c",3)) {
28f0d0ec 1459 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH
1460 s = cmd+PL_cshlen+3;
1461 if (*s == 'f') {
1462 s++;
28f0d0ec 1463 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH
1464 }
1465 if (*s == ' ')
1466 s++;
1467 if (*s++ == '\'') {
0bcc34c2 1468 char * const ncmd = s;
d05c1ba0
JH
1469
1470 while (*s)
1471 s++;
1472 if (s[-1] == '\n')
1473 *--s = '\0';
1474 if (s[-1] == '\'') {
1475 *--s = '\0';
b35112e7 1476 PERL_FPU_PRE_EXEC
7c0dd7ca 1477 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 1478 PERL_FPU_POST_EXEC
d05c1ba0 1479 *s = '\'';
a0f2c8ec 1480 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
15db3ae2 1481 Safefree(buf);
d05c1ba0
JH
1482 return FALSE;
1483 }
1484 }
a687059c
LW
1485 }
1486 }
bf38876a 1487#endif /* CSH */
a687059c
LW
1488
1489 /* see if there are shell metacharacters in it */
1490
748a9306
LW
1491 if (*cmd == '.' && isSPACE(cmd[1]))
1492 goto doshell;
1493
1494 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1495 goto doshell;
1496
294b3b39
AL
1497 s = cmd;
1498 while (isALNUM(*s))
1499 s++; /* catch VAR=val gizmo */
63f2c1e1
LW
1500 if (*s == '=')
1501 goto doshell;
748a9306 1502
a687059c 1503 for (s = cmd; *s; s++) {
d05c1ba0
JH
1504 if (*s != ' ' && !isALPHA(*s) &&
1505 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1506 if (*s == '\n' && !s[1]) {
1507 *s = '\0';
1508 break;
1509 }
603a98b0
IZ
1510 /* handle the 2>&1 construct at the end */
1511 if (*s == '>' && s[1] == '&' && s[2] == '1'
1512 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1513 && (!s[3] || isSPACE(s[3])))
1514 {
6867be6d 1515 const char *t = s + 3;
603a98b0
IZ
1516
1517 while (*t && isSPACE(*t))
1518 ++t;
943bbd07 1519 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1520 s[-2] = '\0';
1521 break;
1522 }
1523 }
a687059c 1524 doshell:
b35112e7 1525 PERL_FPU_PRE_EXEC
7c0dd7ca 1526 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 1527 PERL_FPU_POST_EXEC
a0f2c8ec 1528 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
15db3ae2 1529 Safefree(buf);
a687059c
LW
1530 return FALSE;
1531 }
1532 }
748a9306 1533
360ea906 1534 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
3280af22
NIS
1535 PL_Cmd = savepvn(cmd, s-cmd);
1536 a = PL_Argv;
1537 for (s = PL_Cmd; *s;) {
294b3b39
AL
1538 while (isSPACE(*s))
1539 s++;
a687059c
LW
1540 if (*s)
1541 *(a++) = s;
294b3b39
AL
1542 while (*s && !isSPACE(*s))
1543 s++;
a687059c
LW
1544 if (*s)
1545 *s++ = '\0';
1546 }
6136c704 1547 *a = NULL;
3280af22 1548 if (PL_Argv[0]) {
b35112e7 1549 PERL_FPU_PRE_EXEC
360ea906 1550 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1551 PERL_FPU_POST_EXEC
b1248f16 1552 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1553 do_execfree();
a687059c 1554 goto doshell;
b1248f16 1555 }
a0f2c8ec 1556 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
a687059c 1557 }
ff8e2863 1558 do_execfree();
15db3ae2 1559 Safefree(buf);
a687059c
LW
1560 return FALSE;
1561}
1562
6890e559 1563#endif /* OS2 || WIN32 */
760ac839 1564
79072805 1565I32
864dbfa3 1566Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1567{
97aff369 1568 dVAR;
79072805 1569 register I32 val;
79072805 1570 register I32 tot = 0;
4634a855 1571 const char *const what = PL_op_name[type];
5c144d81 1572 const char *s;
890ce7af 1573 SV ** const oldmark = mark;
a687059c 1574
7918f24d
NC
1575 PERL_ARGS_ASSERT_APPLY;
1576
1444765e
NC
1577 /* Doing this ahead of the switch statement preserves the old behaviour,
1578 where attempting to use kill as a taint test test would fail on
1579 platforms where kill was not defined. */
1580#ifndef HAS_KILL
1581 if (type == OP_KILL)
4634a855 1582 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1583#endif
1584#ifndef HAS_CHOWN
1585 if (type == OP_CHOWN)
4634a855 1586 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1587#endif
1588
1589
20408e3c 1590#define APPLY_TAINT_PROPER() \
3280af22 1591 STMT_START { \
17406bd6 1592 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1593 } STMT_END
20408e3c
GS
1594
1595 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1596 if (PL_tainting) {
463ee0b2 1597 while (++mark <= sp) {
bbce6d69
PP
1598 if (SvTAINTED(*mark)) {
1599 TAINT;
1600 break;
1601 }
463ee0b2
LW
1602 }
1603 mark = oldmark;
1604 }
a687059c 1605 switch (type) {
79072805 1606 case OP_CHMOD:
20408e3c 1607 APPLY_TAINT_PROPER();
79072805 1608 if (++mark <= sp) {
4ea561bc 1609 val = SvIV(*mark);
20408e3c
GS
1610 APPLY_TAINT_PROPER();
1611 tot = sp - mark;
79072805 1612 while (++mark <= sp) {
c4aca7d0 1613 GV* gv;
2ea1cce7 1614 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA
1615 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1616#ifdef HAS_FCHMOD
1617 APPLY_TAINT_PROPER();
1618 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1619 tot--;
1620#else
b9c6780e 1621 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1622#endif
1623 }
1624 else {
1625 tot--;
1626 }
1627 }
c4aca7d0 1628 else {
93564729 1629 const char *name = SvPV_nomg_const_nolen(*mark);
c4aca7d0
GA
1630 APPLY_TAINT_PROPER();
1631 if (PerlLIO_chmod(name, val))
1632 tot--;
1633 }
a687059c
LW
1634 }
1635 }
1636 break;
fe14fcc3 1637#ifdef HAS_CHOWN
79072805 1638 case OP_CHOWN:
20408e3c 1639 APPLY_TAINT_PROPER();
79072805 1640 if (sp - mark > 2) {
6867be6d 1641 register I32 val2;
463ee0b2
LW
1642 val = SvIVx(*++mark);
1643 val2 = SvIVx(*++mark);
20408e3c 1644 APPLY_TAINT_PROPER();
a0d0e21e 1645 tot = sp - mark;
79072805 1646 while (++mark <= sp) {
c4aca7d0 1647 GV* gv;
2ea1cce7 1648 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA
1649 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1650#ifdef HAS_FCHOWN
1651 APPLY_TAINT_PROPER();
1652 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1653 tot--;
1654#else
b9c6780e 1655 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1656#endif
1657 }
1658 else {
1659 tot--;
1660 }
1661 }
c4aca7d0 1662 else {
93564729 1663 const char *name = SvPV_nomg_const_nolen(*mark);
c4aca7d0
GA
1664 APPLY_TAINT_PROPER();
1665 if (PerlLIO_chown(name, val, val2))
1666 tot--;
1667 }
a687059c
LW
1668 }
1669 }
1670 break;
b1248f16 1671#endif
a1d180c4 1672/*
dd64f1c3
AD
1673XXX Should we make lchown() directly available from perl?
1674For now, we'll let Configure test for HAS_LCHOWN, but do
1675nothing in the core.
1676 --AD 5/1998
1677*/
fe14fcc3 1678#ifdef HAS_KILL
79072805 1679 case OP_KILL:
20408e3c 1680 APPLY_TAINT_PROPER();
55497cff
PP
1681 if (mark == sp)
1682 break;
e62f0680 1683 s = SvPVx_nolen_const(*++mark);
e02bfb16 1684 if (isALPHA(*s)) {
79072805
LW
1685 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1686 s += 3;
e02bfb16 1687 if ((val = whichsig(s)) < 0)
cea2e8a9 1688 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1689 }
1690 else
4ea561bc 1691 val = SvIV(*mark);
20408e3c
GS
1692 APPLY_TAINT_PROPER();
1693 tot = sp - mark;
3595fcef
PP
1694#ifdef VMS
1695 /* kill() doesn't do process groups (job trees?) under VMS */
1696 if (val < 0) val = -val;
1697 if (val == SIGKILL) {
1698# include <starlet.h>
1699 /* Use native sys$delprc() to insure that target process is
1700 * deleted; supervisor-mode images don't pay attention to
1701 * CRTL's emulation of Unix-style signals and kill()
1702 */
1703 while (++mark <= sp) {
5f521955
JH
1704 I32 proc;
1705 register unsigned long int __vmssts;
8af710eb 1706 SvGETMAGIC(*mark);
e2c0f81f
DG
1707 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1708 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1709 proc = SvIV_nomg(*mark);
20408e3c 1710 APPLY_TAINT_PROPER();
3595fcef
PP
1711 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1712 tot--;
1713 switch (__vmssts) {
1714 case SS$_NONEXPR:
1715 case SS$_NOSUCHNODE:
1716 SETERRNO(ESRCH,__vmssts);
1717 break;
1718 case SS$_NOPRIV:
1719 SETERRNO(EPERM,__vmssts);
1720 break;
1721 default:
1722 SETERRNO(EVMSERR,__vmssts);
1723 }
1724 }
1725 }
8165faea 1726 PERL_ASYNC_CHECK();
3595fcef
PP
1727 break;
1728 }
1729#endif
79072805
LW
1730 if (val < 0) {
1731 val = -val;
1732 while (++mark <= sp) {
5f521955 1733 I32 proc;
8af710eb 1734 SvGETMAGIC(*mark);
e2c0f81f
DG
1735 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1736 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1737 proc = SvIV_nomg(*mark);
20408e3c 1738 APPLY_TAINT_PROPER();
fe14fcc3 1739#ifdef HAS_KILLPG
3028581b 1740 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1741#else
3028581b 1742 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1743#endif
79072805 1744 tot--;
a687059c 1745 }
79072805
LW
1746 }
1747 else {
1748 while (++mark <= sp) {
5f521955 1749 I32 proc;
8af710eb 1750 SvGETMAGIC(*mark);
e2c0f81f
DG
1751 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1752 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1753 proc = SvIV_nomg(*mark);
20408e3c
GS
1754 APPLY_TAINT_PROPER();
1755 if (PerlProc_kill(proc, val))
79072805 1756 tot--;
a687059c
LW
1757 }
1758 }
8165faea 1759 PERL_ASYNC_CHECK();
a687059c 1760 break;
b1248f16 1761#endif
79072805 1762 case OP_UNLINK:
20408e3c 1763 APPLY_TAINT_PROPER();
79072805
LW
1764 tot = sp - mark;
1765 while (++mark <= sp) {
e62f0680 1766 s = SvPV_nolen_const(*mark);
20408e3c 1767 APPLY_TAINT_PROPER();
3280af22 1768 if (PL_euid || PL_unsafe) {
b8ffc8df 1769 if (UNLINK(s))
a687059c
LW
1770 tot--;
1771 }
1772 else { /* don't let root wipe out directories without -U */
3280af22 1773 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1774 tot--;
1775 else {
b8ffc8df 1776 if (UNLINK(s))
a687059c
LW
1777 tot--;
1778 }
1779 }
1780 }
1781 break;
e96b369d 1782#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1783 case OP_UTIME:
20408e3c 1784 APPLY_TAINT_PROPER();
79072805 1785 if (sp - mark > 2) {
e96b369d
GA
1786#if defined(HAS_FUTIMES)
1787 struct timeval utbuf[2];
1788 void *utbufp = utbuf;
1789#elif defined(I_UTIME) || defined(VMS)
663a0e37 1790 struct utimbuf utbuf;
07409e01 1791 struct utimbuf *utbufp = &utbuf;
663a0e37 1792#else
a687059c 1793 struct {
dd2821f6
GS
1794 Time_t actime;
1795 Time_t modtime;
a687059c 1796 } utbuf;
07409e01 1797 void *utbufp = &utbuf;
663a0e37 1798#endif
a687059c 1799
0bcc34c2
AL
1800 SV* const accessed = *++mark;
1801 SV* const modified = *++mark;
c6f7b413 1802
6ec06612
SB
1803 /* Be like C, and if both times are undefined, let the C
1804 * library figure out what to do. This usually means
1805 * "current time". */
c6f7b413
RS
1806
1807 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1808 utbufp = NULL;
1809 else {
1810 Zero(&utbuf, sizeof utbuf, char);
e96b369d 1811#ifdef HAS_FUTIMES
4ea561bc 1812 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 1813 utbuf[0].tv_usec = 0;
4ea561bc 1814 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA
1815 utbuf[1].tv_usec = 0;
1816#elif defined(BIG_TIME)
4ea561bc
NC
1817 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1818 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 1819#else
4ea561bc
NC
1820 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1821 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 1822#endif
6ec06612 1823 }
4373e329 1824 APPLY_TAINT_PROPER();
79072805
LW
1825 tot = sp - mark;
1826 while (++mark <= sp) {
e96b369d 1827 GV* gv;
6e592b3a 1828 if (isGV_with_GP(*mark)) {
159b6efe 1829 gv = MUTABLE_GV(*mark);
e96b369d
GA
1830 do_futimes:
1831 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1832#ifdef HAS_FUTIMES
1833 APPLY_TAINT_PROPER();
8b7231d9
SP
1834 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1835 (struct timeval *) utbufp))
e96b369d
GA
1836 tot--;
1837#else
1838 Perl_die(aTHX_ PL_no_func, "futimes");
1839#endif
1840 }
1841 else {
1842 tot--;
1843 }
1844 }
6e592b3a 1845 else if (SvROK(*mark) && isGV_with_GP(SvRV(*mark))) {
159b6efe 1846 gv = MUTABLE_GV(SvRV(*mark));
e96b369d
GA
1847 goto do_futimes;
1848 }
1849 else {
0bcc34c2 1850 const char * const name = SvPV_nolen_const(*mark);
e96b369d
GA
1851 APPLY_TAINT_PROPER();
1852#ifdef HAS_FUTIMES
8b7231d9 1853 if (utimes(name, (struct timeval *)utbufp))
e96b369d
GA
1854#else
1855 if (PerlLIO_utime(name, utbufp))
1856#endif
1857 tot--;
1858 }
1859
a687059c 1860 }
a687059c
LW
1861 }
1862 else
79072805 1863 tot = 0;
a687059c 1864 break;
a0d0e21e 1865#endif
a687059c
LW
1866 }
1867 return tot;
20408e3c 1868
20408e3c 1869#undef APPLY_TAINT_PROPER
a687059c
LW
1870}
1871
1872/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1873#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1874bool
ae1951c1
NC
1875Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1876/* effective is a flag, true for EUID, or for checking if the effective gid
1877 * is in the list of groups returned from getgroups().
1878 */
a687059c 1879{
97aff369 1880 dVAR;
7918f24d
NC
1881
1882 PERL_ARGS_ASSERT_CANDO;
1883
bee1dbe2 1884#ifdef DOSISH
fe14fcc3
LW
1885 /* [Comments and code from Len Reed]
1886 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1887 * to write-protected files. The execute permission bit is set
486ec47a 1888 * by the Microsoft C library stat() function for the following:
fe14fcc3
LW
1889 * .exe files
1890 * .com files
1891 * .bat files
1892 * directories
1893 * All files and directories are readable.
1894 * Directories and special files, e.g. "CON", cannot be
1895 * write-protected.
1896 * [Comment by Tom Dinger -- a directory can have the write-protect
1897 * bit set in the file system, but DOS permits changes to
1898 * the directory anyway. In addition, all bets are off
1899 * here for networked software, such as Novell and
1900 * Sun's PC-NFS.]
1901 */
1902
bee1dbe2
LW
1903 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1904 * too so it will actually look into the files for magic numbers
1905 */
7f4774ae 1906 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1907
55497cff 1908#else /* ! DOSISH */
b595cd4b
RU
1909# ifdef __CYGWIN__
1910 if (ingroup(544,effective)) { /* member of Administrators */
1911# else
3280af22 1912 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
b595cd4b 1913# endif
7f4774ae 1914 if (mode == S_IXUSR) {
c623bd54 1915 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1916 return TRUE;
1917 }
1918 else
1919 return TRUE; /* root reads and writes anything */
1920 return FALSE;
1921 }
3280af22 1922 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
7f4774ae 1923 if (statbufp->st_mode & mode)
a687059c
LW
1924 return TRUE; /* ok as "user" */
1925 }
d8eceb89 1926 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 1927 if (statbufp->st_mode & mode >> 3)
a687059c
LW
1928 return TRUE; /* ok as "group" */
1929 }
7f4774ae 1930 else if (statbufp->st_mode & mode >> 6)
a687059c
LW
1931 return TRUE; /* ok as "other" */
1932 return FALSE;
55497cff 1933#endif /* ! DOSISH */
a687059c 1934}
a0d0e21e 1935#endif /* ! VMS */
a687059c 1936
1f676739 1937static bool
0da8eb3a 1938S_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 1939{
97aff369 1940 dVAR;
3280af22 1941 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1942 return TRUE;
fe14fcc3 1943#ifdef HAS_GETGROUPS
a687059c 1944 {
331b57bc 1945 Groups_t *gary = NULL;
79072805 1946 I32 anum;
331b57bc 1947 bool rc = FALSE;
a687059c 1948
331b57bc
SP
1949 anum = getgroups(0, gary);
1950 Newx(gary, anum, Groups_t);
1951 anum = getgroups(anum, gary);
a687059c 1952 while (--anum >= 0)
331b57bc
SP
1953 if (gary[anum] == testgid) {
1954 rc = TRUE;
1955 break;
1956 }
1957
1958 Safefree(gary);
1959 return rc;
a687059c 1960 }
c685562b 1961#else
a687059c 1962 return FALSE;
cd39f2b6 1963#endif
a687059c 1964}
c2ab57d4 1965
fe14fcc3 1966#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1967
79072805 1968I32
864dbfa3 1969Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1970{
97aff369 1971 dVAR;
0bcc34c2 1972 const key_t key = (key_t)SvNVx(*++mark);
c3312966 1973 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
6867be6d 1974 const I32 flags = SvIVx(*++mark);
294a48e9 1975
7918f24d 1976 PERL_ARGS_ASSERT_DO_IPCGET;
294a48e9 1977 PERL_UNUSED_ARG(sp);
c2ab57d4 1978
748a9306 1979 SETERRNO(0,0);
c2ab57d4
LW
1980 switch (optype)
1981 {
fe14fcc3 1982#ifdef HAS_MSG
79072805 1983 case OP_MSGGET:
c2ab57d4 1984 return msgget(key, flags);
e5d73d77 1985#endif
fe14fcc3 1986#ifdef HAS_SEM
79072805 1987 case OP_SEMGET:
c3312966 1988 return semget(key, (int) SvIV(nsv), flags);
e5d73d77 1989#endif
fe14fcc3 1990#ifdef HAS_SHM
79072805 1991 case OP_SHMGET:
c3312966 1992 return shmget(key, (size_t) SvUV(nsv), flags);
e5d73d77 1993#endif
fe14fcc3 1994#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1995 default:
fe13d51d 1996 /* diag_listed_as: msg%s not implemented */
cea2e8a9 1997 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1998#endif
c2ab57d4
LW
1999 }
2000 return -1; /* should never happen */
2001}
2002
79072805 2003I32
864dbfa3 2004Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2005{
97aff369 2006 dVAR;
c2ab57d4 2007 char *a;
a0d0e21e 2008 I32 ret = -1;
6867be6d 2009 const I32 id = SvIVx(*++mark);
95b63a38 2010#ifdef Semctl
6867be6d 2011 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2012#endif
6867be6d 2013 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
2014 SV * const astr = *++mark;
2015 STRLEN infosize = 0;
2016 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2017
7918f24d 2018 PERL_ARGS_ASSERT_DO_IPCCTL;
0bcc34c2 2019 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
2020
2021 switch (optype)
2022 {
fe14fcc3 2023#ifdef HAS_MSG
79072805 2024 case OP_MSGCTL:
c2ab57d4
LW
2025 if (cmd == IPC_STAT || cmd == IPC_SET)
2026 infosize = sizeof(struct msqid_ds);
2027 break;
e5d73d77 2028#endif
fe14fcc3 2029#ifdef HAS_SHM
79072805 2030 case OP_SHMCTL:
c2ab57d4
LW
2031 if (cmd == IPC_STAT || cmd == IPC_SET)
2032 infosize = sizeof(struct shmid_ds);
2033 break;
e5d73d77 2034#endif
fe14fcc3 2035#ifdef HAS_SEM
79072805 2036 case OP_SEMCTL:
39398f3f 2037#ifdef Semctl
c2ab57d4
LW
2038 if (cmd == IPC_STAT || cmd == IPC_SET)
2039 infosize = sizeof(struct semid_ds);
2040 else if (cmd == GETALL || cmd == SETALL)
2041 {
8e591e46 2042 struct semid_ds semds;
bd89102f 2043 union semun semun;
e6f0bdd6
GS
2044#ifdef EXTRA_F_IN_SEMUN_BUF
2045 semun.buff = &semds;
2046#else
84902520 2047 semun.buf = &semds;
e6f0bdd6 2048#endif
c2ab57d4 2049 getinfo = (cmd == GETALL);
9b89d93d
GB
2050 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2051 return -1;
6e21c824
LW
2052 infosize = semds.sem_nsems * sizeof(short);
2053 /* "short" is technically wrong but much more portable
2054 than guessing about u_?short(_t)? */
c2ab57d4 2055 }
39398f3f 2056#else
fe13d51d 2057 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2058 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2059#endif
c2ab57d4 2060 break;
e5d73d77 2061#endif
fe14fcc3 2062#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2063 default:
fe13d51d 2064 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2065 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2066#endif
c2ab57d4
LW
2067 }
2068
2069 if (infosize)
2070 {
2071 if (getinfo)
2072 {
93524f2b 2073 SvPV_force_nolen(astr);
a0d0e21e 2074 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
2075 }
2076 else
2077 {
93524f2b 2078 STRLEN len;
463ee0b2
LW
2079 a = SvPV(astr, len);
2080 if (len != infosize)
cea2e8a9 2081 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
2082 PL_op_desc[optype],
2083 (unsigned long)len,
2084 (long)infosize);
c2ab57d4
LW
2085 }
2086 }
2087 else
2088 {
0bcc34c2 2089 const IV i = SvIV(astr);
56431972 2090 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2091 }
748a9306 2092 SETERRNO(0,0);
c2ab57d4
LW
2093 switch (optype)
2094 {
fe14fcc3 2095#ifdef HAS_MSG
79072805 2096 case OP_MSGCTL:
bee1dbe2 2097 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2098 break;
e5d73d77 2099#endif
fe14fcc3 2100#ifdef HAS_SEM
bd89102f 2101 case OP_SEMCTL: {
39398f3f 2102#ifdef Semctl
bd89102f
AD
2103 union semun unsemds;
2104
e6f0bdd6
GS
2105#ifdef EXTRA_F_IN_SEMUN_BUF
2106 unsemds.buff = (struct semid_ds *)a;
2107#else
bd89102f 2108 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2109#endif
bd89102f 2110 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2111#else
fe13d51d 2112 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2113 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2114#endif
bd89102f 2115 }
c2ab57d4 2116 break;
e5d73d77 2117#endif
fe14fcc3 2118#ifdef HAS_SHM
79072805 2119 case OP_SHMCTL:
bee1dbe2 2120 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2121 break;
e5d73d77 2122#endif
c2ab57d4
LW
2123 }
2124 if (getinfo && ret >= 0) {
79072805
LW
2125 SvCUR_set(astr, infosize);
2126 *SvEND(astr) = '\0';
a0d0e21e 2127 SvSETMAGIC(astr);
c2ab57d4
LW
2128 }
2129 return ret;
2130}
2131
79072805 2132I32
864dbfa3 2133Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2134{
97aff369 2135 dVAR;
fe14fcc3 2136#ifdef HAS_MSG
463ee0b2 2137 STRLEN len;
6867be6d 2138 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2139 SV * const mstr = *++mark;
2140 const I32 flags = SvIVx(*++mark);
2141 const char * const mbuf = SvPV_const(mstr, len);
2142 const I32 msize = len - sizeof(long);
2143
7918f24d 2144 PERL_ARGS_ASSERT_DO_MSGSND;
890ce7af 2145 PERL_UNUSED_ARG(sp);
c2ab57d4 2146
0bcc34c2 2147 if (msize < 0)
cea2e8a9 2148 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2149 SETERRNO(0,0);
bee1dbe2 2150 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2151#else
2d51fa4d
RGS
2152 PERL_UNUSED_ARG(sp);
2153 PERL_UNUSED_ARG(mark);
fe13d51d 2154 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2155 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2156#endif
c2ab57d4
LW
2157}
2158
79072805 2159I32
864dbfa3 2160Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2161{
fe14fcc3 2162#ifdef HAS_MSG
97aff369 2163 dVAR;
c2ab57d4
LW
2164 char *mbuf;
2165 long mtype;
6867be6d 2166 I32 msize, flags, ret;
6867be6d 2167 const I32 id = SvIVx(*++mark);
0bcc34c2 2168 SV * const mstr = *++mark;
7918f24d
NC
2169
2170 PERL_ARGS_ASSERT_DO_MSGRCV;
890ce7af 2171 PERL_UNUSED_ARG(sp);
79072805 2172
c2e66d9e
GS
2173 /* suppress warning when reading into undef var --jhi */
2174 if (! SvOK(mstr))
76f68e9b 2175 sv_setpvs(mstr, "");
463ee0b2
LW
2176 msize = SvIVx(*++mark);
2177 mtype = (long)SvIVx(*++mark);
2178 flags = SvIVx(*++mark);
93524f2b 2179 SvPV_force_nolen(mstr);
a0d0e21e 2180 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2181
748a9306 2182 SETERRNO(0,0);
bee1dbe2 2183 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2184 if (ret >= 0) {
79072805
LW
2185 SvCUR_set(mstr, sizeof(long)+ret);
2186 *SvEND(mstr) = '\0';
41d6edb2
JH
2187#ifndef INCOMPLETE_TAINTS
2188 /* who knows who has been playing with this message? */
2189 SvTAINTED_on(mstr);
2190#endif
c2ab57d4
LW
2191 }
2192 return ret;
e5d73d77 2193#else
2d51fa4d
RGS
2194 PERL_UNUSED_ARG(sp);
2195 PERL_UNUSED_ARG(mark);
fe13d51d 2196 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2197 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2198#endif
c2ab57d4
LW
2199}
2200
79072805 2201I32
864dbfa3 2202Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2203{
fe14fcc3 2204#ifdef HAS_SEM
97aff369 2205 dVAR;
463ee0b2 2206 STRLEN opsize;
6867be6d 2207 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2208 SV * const opstr = *++mark;
2209 const char * const opbuf = SvPV_const(opstr, opsize);
7918f24d
NC
2210
2211 PERL_ARGS_ASSERT_DO_SEMOP;
890ce7af 2212 PERL_UNUSED_ARG(sp);
c2ab57d4 2213
248ff010
NC
2214 if (opsize < 3 * SHORTSIZE
2215 || (opsize % (3 * SHORTSIZE))) {
93189314 2216 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2217 return -1;
2218 }
748a9306 2219 SETERRNO(0,0);
248ff010
NC
2220 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2221 {
6867be6d 2222 const int nsops = opsize / (3 * sizeof (short));
248ff010 2223 int i = nsops;
0bcc34c2 2224 short * const ops = (short *) opbuf;
248ff010
NC
2225 short *o = ops;
2226 struct sembuf *temps, *t;
2227 I32 result;
2228
a02a5408 2229 Newx (temps, nsops, struct sembuf);
248ff010
NC
2230 t = temps;
2231 while (i--) {
2232 t->sem_num = *o++;
2233 t->sem_op = *o++;
2234 t->sem_flg = *o++;
2235 t++;
2236 }
2237 result = semop(id, temps, nsops);
2238 t = temps;
2239 o = ops;
2240 i = nsops;
2241 while (i--) {
2242 *o++ = t->sem_num;
2243 *o++ = t->sem_op;
2244 *o++ = t->sem_flg;
2245 t++;
2246 }
2247 Safefree(temps);
2248 return result;
2249 }
e5d73d77 2250#else
fe13d51d 2251 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2252 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2253#endif
c2ab57d4
LW
2254}
2255
79072805 2256I32
864dbfa3 2257Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2258{
fe14fcc3 2259#ifdef HAS_SHM
97aff369 2260 dVAR;
4373e329 2261 char *shm;
c2ab57d4 2262 struct shmid_ds shmds;
6867be6d 2263 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2264 SV * const mstr = *++mark;
2265 const I32 mpos = SvIVx(*++mark);
2266 const I32 msize = SvIVx(*++mark);
7918f24d
NC
2267
2268 PERL_ARGS_ASSERT_DO_SHMIO;
890ce7af 2269 PERL_UNUSED_ARG(sp);
c2ab57d4 2270
748a9306 2271 SETERRNO(0,0);
c2ab57d4
LW
2272 if (shmctl(id, IPC_STAT, &shmds) == -1)
2273 return -1;
7f39519f
NC
2274 if (mpos < 0 || msize < 0
2275 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
93189314 2276 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2277 return -1;
2278 }
d4c19fe8 2279 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2280 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2281 return -1;
79072805 2282 if (optype == OP_SHMREAD) {
c8ae91a8 2283 char *mbuf;
9f538c04
GS
2284 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2285 if (! SvOK(mstr))
76f68e9b 2286 sv_setpvs(mstr, "");
93524f2b 2287 SvPV_force_nolen(mstr);
bb7a0f54 2288 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2289
bee1dbe2 2290 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2291 SvCUR_set(mstr, msize);
2292 *SvEND(mstr) = '\0';
a0d0e21e 2293 SvSETMAGIC(mstr);
d929ce6f
JH
2294#ifndef INCOMPLETE_TAINTS
2295 /* who knows who has been playing with this shared memory? */
2296 SvTAINTED_on(mstr);
2297#endif
c2ab57d4
LW
2298 }
2299 else {
93524f2b 2300 STRLEN len;
c2ab57d4 2301
93524f2b 2302 const char *mbuf = SvPV_const(mstr, len);
027aa12d 2303 const I32 n = ((I32)len > msize) ? msize : (I32)len;
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
fe13d51d 2310 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2311 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2312#endif
c2ab57d4
LW
2313}
2314
fe14fcc3 2315#endif /* SYSV IPC */
4e35701f 2316
0d44d22b 2317/*
ccfc67b7
JH
2318=head1 IO Functions
2319
0d44d22b
NC
2320=for apidoc start_glob
2321
2322Function called by C<do_readline> to spawn a glob (or do the glob inside
2323perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2324this glob starter is only used by miniperl during the build process.
0d44d22b 2325Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2326
0d44d22b
NC
2327=cut
2328*/
2329
2330PerlIO *
2331Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2332{
27da23d5 2333 dVAR;
561b68a9 2334 SV * const tmpcmd = newSV(0);
0d44d22b 2335 PerlIO *fp;
7918f24d
NC
2336
2337 PERL_ARGS_ASSERT_START_GLOB;
2338
0d44d22b
NC
2339 ENTER;
2340 SAVEFREESV(tmpcmd);
2341#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2342 /* since spawning off a process is a real performance hit */
dca5a913
JM
2343
2344PerlIO *
2345Perl_vms_start_glob
2346 (pTHX_ SV *tmpglob,
2347 IO *io);
2348
49a7a762 2349 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2350
0d44d22b 2351#else /* !VMS */
0d44d22b
NC
2352#ifdef DOSISH
2353#ifdef OS2
2354 sv_setpv(tmpcmd, "for a in ");
2355 sv_catsv(tmpcmd, tmpglob);
2356 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2357#else
2358#ifdef DJGPP
2359 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2360 sv_catsv(tmpcmd, tmpglob);
2361#else
2362 sv_setpv(tmpcmd, "perlglob ");
2363 sv_catsv(tmpcmd, tmpglob);
2364 sv_catpv(tmpcmd, " |");
2365#endif /* !DJGPP */
2366#endif /* !OS2 */
2367#else /* !DOSISH */
2368#if defined(CSH)
2369 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2370 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2371 sv_catsv(tmpcmd, tmpglob);
2372 sv_catpv(tmpcmd, "' 2>/dev/null |");
2373#else
2374 sv_setpv(tmpcmd, "echo ");
2375 sv_catsv(tmpcmd, tmpglob);
2376#if 'z' - 'a' == 25
2377 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2378#else
2379 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2380#endif
2381#endif /* !CSH */
2382#endif /* !DOSISH */
93524f2b 2383 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
4608196e 2384 FALSE, O_RDONLY, 0, NULL);
0d44d22b
NC
2385 fp = IoIFP(io);
2386#endif /* !VMS */
2387 LEAVE;
2388 return fp;
2389}
66610fdd
RGS
2390
2391/*
2392 * Local variables:
2393 * c-indentation-style: bsd
2394 * c-basic-offset: 4
2395 * indent-tabs-mode: t
2396 * End:
2397 *
37442d52
RGS
2398 * ex: set ts=8 sts=4 sw=4 noet:
2399 */