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a0d0e21e 1/* doio.c
a687059c 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a687059c 5 *
6e21c824
LW
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
a687059c 8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * Far below them they saw the white waters pour into a foaming bowl, and
13 * then swirl darkly about a deep oval basin in the rocks, until they found
14 * their way out again through a narrow gate, and flowed away, fuming and
15 * chattering, into calmer and more level reaches.
16 *
17 * [p.684 of _The Lord of the Rings_, IV/vi: "The Forbidden Pool"]
a687059c
LW
18 */
19
166f8a29
DM
20/* This file contains functions that do the actual I/O on behalf of ops.
21 * For example, pp_print() calls the do_print() function in this file for
22 * each argument needing printing.
23 */
24
a687059c 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_DOIO_C
a687059c
LW
27#include "perl.h"
28
fe14fcc3 29#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 30#ifndef HAS_SEM
c2ab57d4 31#include <sys/ipc.h>
aec308ec 32#endif
fe14fcc3 33#ifdef HAS_MSG
c2ab57d4 34#include <sys/msg.h>
e5d73d77 35#endif
fe14fcc3 36#ifdef HAS_SHM
c2ab57d4 37#include <sys/shm.h>
a0d0e21e 38# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 39 extern Shmat_t shmat (int, char *, int);
a0d0e21e 40# endif
c2ab57d4 41#endif
e5d73d77 42#endif
c2ab57d4 43
663a0e37 44#ifdef I_UTIME
3730b96e 45# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
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,
d0c0e7dd
FC
129 "Warning: unable to close filehandle %"HEKf" properly.\n",
130 HEKfARG(GvENAME_HEK(gv))
131 );
ee518936 132 }
4608196e 133 IoOFP(io) = IoIFP(io) = NULL;
a687059c 134 }
c07a80fd
PP
135
136 if (as_raw) {
b931b1d9 137 /* sysopen style args, i.e. integer mode and permissions */
ee518936 138 STRLEN ix = 0;
e1ec3a88 139 const int appendtrunc =
3dccc55c 140 0
d1da7611 141#ifdef O_APPEND /* Not fully portable. */
3dccc55c 142 |O_APPEND
d1da7611
JH
143#endif
144#ifdef O_TRUNC /* Not fully portable. */
3dccc55c 145 |O_TRUNC
d1da7611 146#endif
3dccc55c 147 ;
6867be6d 148 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
3dccc55c
JH
149 int ismodifying;
150
151 if (num_svs != 0) {
152 Perl_croak(aTHX_ "panic: sysopen with multiple args");
153 }
154 /* It's not always
155
156 O_RDONLY 0
157 O_WRONLY 1
158 O_RDWR 2
159
160 It might be (in OS/390 and Mac OS Classic it is)
161
162 O_WRONLY 1
163 O_RDONLY 2
164 O_RDWR 3
165
166 This means that simple & with O_RDWR would look
167 like O_RDONLY is present. Therefore we have to
168 be more careful.
169 */
170 if ((ismodifying = (rawmode & modifyingmode))) {
171 if ((ismodifying & O_WRONLY) == O_WRONLY ||
172 (ismodifying & O_RDWR) == O_RDWR ||
173 (ismodifying & (O_CREAT|appendtrunc)))
174 TAINT_PROPER("sysopen");
175 }
3b6c1aba 176 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
b931b1d9 177
09458382 178#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
b94c04ac 179 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
5ff3f7a4
GS
180#endif
181
06c7082d 182 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
ee518936 183
59cd0e26 184 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
ee518936
NIS
185 num_svs = 1;
186 svp = &namesv;
bd61b366 187 type = NULL;
b94c04ac 188 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
a687059c 189 }
c07a80fd 190 else {
b931b1d9 191 /* Regular (non-sys) open */
2fbb330f 192 char *name;
faecd977 193 STRLEN olen = len;
b931b1d9
NIS
194 char *tend;
195 int dodup = 0;
c07a80fd 196
2fbb330f 197 type = savepvn(oname, len);
b931b1d9 198 tend = type+len;
faecd977 199 SAVEFREEPV(type);
eb649f83
AMS
200
201 /* Lose leading and trailing white space */
294b3b39
AL
202 while (isSPACE(*type))
203 type++;
eb649f83
AMS
204 while (tend > type && isSPACE(tend[-1]))
205 *--tend = '\0';
206
6170680b 207 if (num_svs) {
c2be40b1 208 /* New style explicit name, type is just mode and layer info */
9a869a14 209#ifdef USE_STDIO
2fbb330f 210 if (SvROK(*svp) && !strchr(oname,'&')) {
9a869a14
RGS
211 if (ckWARN(WARN_IO))
212 Perl_warner(aTHX_ packWARN(WARN_IO),
213 "Can't open a reference");
93189314 214 SETERRNO(EINVAL, LIB_INVARG);
9a869a14
RGS
215 goto say_false;
216 }
217#endif /* USE_STDIO */
d71e3dc3
DM
218 name = (SvOK(*svp) || SvGMAGICAL(*svp)) ?
219 savesvpv (*svp) : savepvs ("");
faecd977 220 SAVEFREEPV(name);
6170680b 221 }
faecd977 222 else {
faecd977 223 name = type;
b931b1d9 224 len = tend-type;
faecd977 225 }
6170680b 226 IoTYPE(io) = *type;
516a5887 227 if ((*type == IoTYPE_RDWR) && /* scary */
01a8ea99 228 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
516a5887 229 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
c2be40b1 230 TAINT_PROPER("open");
6170680b 231 mode[1] = *type++;
c07a80fd 232 writing = 1;
a687059c 233 }
c07a80fd 234
9f37169a 235 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS
236 if (num_svs) {
237 if (type[1] != IoTYPE_STD) {
c2be40b1 238 unknown_open_mode:
b931b1d9
NIS
239 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
240 }
241 type++;
6170680b 242 }
294b3b39
AL
243 do {
244 type++;
245 } while (isSPACE(*type));
faecd977 246 if (!num_svs) {
6170680b 247 name = type;
b931b1d9 248 len = tend-type;
faecd977 249 }
4a7d1889
NIS
250 if (*name == '\0') {
251 /* command is missing 19990114 */
06eaf0bc 252 if (ckWARN(WARN_PIPE))
9014280d 253 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
254 errno = EPIPE;
255 goto say_false;
256 }
f27977c3 257 if (!(*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP
258 TAINT_ENV();
259 TAINT_PROPER("piped open");
b931b1d9 260 if (!num_svs && name[len-1] == '|') {
faecd977 261 name[--len] = '\0' ;
599cee73 262 if (ckWARN(WARN_PIPE))
9014280d 263 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 264 }
a1d180c4 265 mode[0] = 'w';
c07a80fd 266 writing = 1;
0c19750d 267 if (out_raw)
5686ee58 268 mode[1] = 'b';
0c19750d 269 else if (out_crlf)
5686ee58 270 mode[1] = 't';
4a7d1889
NIS
271 if (num_svs > 1) {
272 fp = PerlProc_popen_list(mode, num_svs, svp);
273 }
274 else {
275 fp = PerlProc_popen(name,mode);
276 }
1771866f
NIS
277 if (num_svs) {
278 if (*type) {
279 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
280 goto say_false;
281 }
282 }
283 }
c2be40b1 284 } /* IoTYPE_PIPE */
9f37169a 285 else if (*type == IoTYPE_WRONLY) {
c07a80fd 286 TAINT_PROPER("open");
6170680b 287 type++;
9f37169a
JH
288 if (*type == IoTYPE_WRONLY) {
289 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 290 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 291 type++;
a0d0e21e 292 }
ee518936 293 else {
c07a80fd 294 mode[0] = 'w';
ee518936 295 }
c07a80fd
PP
296 writing = 1;
297
0c19750d 298 if (out_raw)
5686ee58 299 mode[1] = 'b';
0c19750d 300 else if (out_crlf)
5686ee58 301 mode[1] = 't';
6170680b 302 if (*type == '&') {
c07a80fd 303 duplicity:
ecdeb87c 304 dodup = PERLIO_DUP_FD;
e620cd72
NIS
305 type++;
306 if (*type == '=') {
c07a80fd 307 dodup = 0;
e620cd72 308 type++;
4a7d1889 309 }
ee518936 310 if (!num_svs && !*type && supplied_fp) {
4a7d1889 311 /* "<+&" etc. is used by typemaps */
c07a80fd 312 fp = supplied_fp;
ee518936 313 }
a0d0e21e 314 else {
35da51f7 315 PerlIO *that_fp = NULL;
e620cd72 316 if (num_svs > 1) {
fe13d51d 317 /* diag_listed_as: More than one argument to '%s' open */
e620cd72
NIS
318 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
319 }
294b3b39
AL
320 while (isSPACE(*type))
321 type++;
1771866f 322 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 323 fd = SvUV(*svp);
24a7a40d 324 num_svs = 0;
ee518936 325 }
e620cd72 326 else if (isDIGIT(*type)) {
e620cd72
NIS
327 fd = atoi(type);
328 }
c07a80fd 329 else {
e1ec3a88 330 const IO* thatio;
e620cd72
NIS
331 if (num_svs) {
332 thatio = sv_2io(*svp);
333 }
334 else {
35da51f7 335 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 336 0, SVt_PVIO);
e620cd72
NIS
337 thatio = GvIO(thatgv);
338 }
c07a80fd 339 if (!thatio) {
6e21c824 340#ifdef EINVAL
93189314 341 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 342#endif
c07a80fd
PP
343 goto say_false;
344 }
f4e789af 345 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
346 /* Flush stdio buffer before dup. --mjd
347 * Unfortunately SEEK_CURing 0 seems to
348 * be optimized away on most platforms;
349 * only Solaris and Linux seem to flush
350 * on that. --jhi */
2c534a3f
NC
351#ifdef USE_SFIO
352 /* sfio fails to clear error on next
353 sfwrite, contrary to documentation.
04d26ece 354 -- Nicholas Clark */
ecdeb87c
NIS
355 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
356 PerlIO_clearerr(that_fp);
2c534a3f 357#endif
7211d486
JH
358 /* On the other hand, do all platforms
359 * take gracefully to flushing a read-only
360 * filehandle? Perhaps we should do
361 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
362 PerlIO_flush(that_fp);
363 fd = PerlIO_fileno(that_fp);
0759c907
JH
364 /* When dup()ing STDIN, STDOUT or STDERR
365 * explicitly set appropriate access mode */
f4e789af
NC
366 if (that_fp == PerlIO_stdout()
367 || that_fp == PerlIO_stderr())
0759c907 368 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 369 else if (that_fp == PerlIO_stdin())
0759c907
JH
370 IoTYPE(io) = IoTYPE_RDONLY;
371 /* When dup()ing a socket, say result is
372 * one as well */
373 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 374 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
375 }
376 else
377 fd = -1;
a0d0e21e 378 }
ee518936 379 if (!num_svs)
bd61b366 380 type = NULL;
ecdeb87c
NIS
381 if (that_fp) {
382 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
383 }
384 else {
c07a80fd 385 if (dodup)
ecdeb87c
NIS
386 fd = PerlLIO_dup(fd);
387 else
388 was_fdopen = TRUE;
389 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 390 if (dodup && fd >= 0)
ecdeb87c
NIS
391 PerlLIO_close(fd);
392 }
faecd977 393 }
c07a80fd 394 }
ee518936 395 } /* & */
c07a80fd 396 else {
294b3b39
AL
397 while (isSPACE(*type))
398 type++;
b931b1d9 399 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 400 type++;
760ac839 401 fp = PerlIO_stdout();
50952442 402 IoTYPE(io) = IoTYPE_STD;
7cf31beb 403 if (num_svs > 1) {
fe13d51d 404 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS
405 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
406 }
c07a80fd
PP
407 }
408 else {
ee518936 409 if (!num_svs) {
59cd0e26 410 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
411 num_svs = 1;
412 svp = &namesv;
bd61b366 413 type = NULL;
ee518936 414 }
6e60e805 415 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 416 }
ee518936 417 } /* !& */
7e72d509
JH
418 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
419 goto unknown_open_mode;
c2be40b1 420 } /* IoTYPE_WRONLY */
9f37169a 421 else if (*type == IoTYPE_RDONLY) {
294b3b39
AL
422 do {
423 type++;
424 } while (isSPACE(*type));
bf38876a 425 mode[0] = 'r';
0c19750d 426 if (in_raw)
5686ee58 427 mode[1] = 'b';
0c19750d 428 else if (in_crlf)
5686ee58 429 mode[1] = 't';
6170680b 430 if (*type == '&') {
bf38876a 431 goto duplicity;
6170680b 432 }
b931b1d9 433 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 434 type++;
760ac839 435 fp = PerlIO_stdin();
50952442 436 IoTYPE(io) = IoTYPE_STD;
7cf31beb 437 if (num_svs > 1) {
fe13d51d 438 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS
439 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
440 }
a687059c 441 }
ee518936
NIS
442 else {
443 if (!num_svs) {
59cd0e26 444 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
445 num_svs = 1;
446 svp = &namesv;
bd61b366 447 type = NULL;
ee518936 448 }
6e60e805 449 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 450 }
7e72d509
JH
451 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
452 goto unknown_open_mode;
c2be40b1
JH
453 } /* IoTYPE_RDONLY */
454 else if ((num_svs && /* '-|...' or '...|' */
455 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 456 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 457 if (num_svs) {
b931b1d9 458 type += 2; /* skip over '-|' */
6170680b
IZ
459 }
460 else {
b931b1d9
NIS
461 *--tend = '\0';
462 while (tend > type && isSPACE(tend[-1]))
463 *--tend = '\0';
a6e20a40
AL
464 for (; isSPACE(*type); type++)
465 ;
6170680b 466 name = type;
b931b1d9 467 len = tend-type;
6170680b 468 }
4a7d1889
NIS
469 if (*name == '\0') {
470 /* command is missing 19990114 */
06eaf0bc 471 if (ckWARN(WARN_PIPE))
9014280d 472 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
473 errno = EPIPE;
474 goto say_false;
475 }
770526c1 476 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
477 TAINT_ENV();
478 TAINT_PROPER("piped open");
a1d180c4 479 mode[0] = 'r';
0c19750d 480
0c19750d 481 if (in_raw)
5686ee58 482 mode[1] = 'b';
0c19750d 483 else if (in_crlf)
5686ee58 484 mode[1] = 't';
0c19750d 485
4a7d1889
NIS
486 if (num_svs > 1) {
487 fp = PerlProc_popen_list(mode,num_svs,svp);
488 }
e620cd72 489 else {
4a7d1889
NIS
490 fp = PerlProc_popen(name,mode);
491 }
50952442 492 IoTYPE(io) = IoTYPE_PIPE;
1771866f 493 if (num_svs) {
294b3b39
AL
494 while (isSPACE(*type))
495 type++;
1771866f
NIS
496 if (*type) {
497 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
498 goto say_false;
499 }
500 }
501 }
a687059c 502 }
c2be40b1 503 else { /* layer(Args) */
6170680b 504 if (num_svs)
c2be40b1 505 goto unknown_open_mode;
6170680b 506 name = type;
50952442 507 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
508 for (; isSPACE(*name); name++)
509 ;
88b61e10 510 mode[0] = 'r';
0c19750d 511
0c19750d 512 if (in_raw)
5686ee58 513 mode[1] = 'b';
0c19750d 514 else if (in_crlf)
5686ee58 515 mode[1] = 't';
0c19750d 516
770526c1 517 if (*name == '-' && name[1] == '\0') {
760ac839 518 fp = PerlIO_stdin();
50952442 519 IoTYPE(io) = IoTYPE_STD;
a687059c 520 }
16fe6d59 521 else {
ee518936 522 if (!num_svs) {
59cd0e26 523 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
524 num_svs = 1;
525 svp = &namesv;
bd61b366 526 type = NULL;
ee518936 527 }
6e60e805 528 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 529 }
a687059c
LW
530 }
531 }
bee1dbe2 532 if (!fp) {
ce44635a 533 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 534 && strchr(oname, '\n')
ce44635a 535
041457d9 536 )
9014280d 537 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 538 goto say_false;
bee1dbe2 539 }
a00b5bd3
NIS
540
541 if (ckWARN(WARN_IO)) {
542 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
543 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 544 Perl_warner(aTHX_ packWARN(WARN_IO),
d0c0e7dd
FC
545 "Filehandle STD%s reopened as %"HEKf
546 " only for input",
97828cef 547 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
d0c0e7dd 548 HEKfARG(GvENAME_HEK(gv)));
a00b5bd3 549 }
ee518936 550 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 551 Perl_warner(aTHX_ packWARN(WARN_IO),
d0c0e7dd
FC
552 "Filehandle STDIN reopened as %"HEKf" only for output",
553 HEKfARG(GvENAME_HEK(gv))
554 );
a00b5bd3
NIS
555 }
556 }
557
e99cca91 558 fd = PerlIO_fileno(fp);
e934609f
JH
559 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
560 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
561 * type probe for socket-ness.
562 */
563 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
564 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
565 /* If PerlIO claims to have fd we had better be able to fstat() it. */
566 (void) PerlIO_close(fp);
6e21c824 567 goto say_false;
a687059c 568 }
7114a2d2 569#ifndef PERL_MICRO
3280af22 570 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 571 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
572#ifdef HAS_SOCKET
573 else if (
c623bd54 574#ifdef S_IFMT
3280af22 575 !(PL_statbuf.st_mode & S_IFMT)
99b89507 576#else
b28d0864 577 !PL_statbuf.st_mode
99b89507 578#endif
0759c907
JH
579 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
580 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
581 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
582 char tmpbuf[256];
583 Sock_size_t buflen = sizeof tmpbuf;
584 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
585 || errno != ENOTSOCK)
586 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
587 /* but some return 0 for streams too, sigh */
99b89507 588 }
e99cca91 589#endif /* HAS_SOCKET */
7114a2d2 590#endif /* !PERL_MICRO */
a687059c 591 }
e99cca91
NIS
592
593 /* Eeek - FIXME !!!
594 * If this is a standard handle we discard all the layer stuff
595 * and just dup the fd into whatever was on the handle before !
596 */
597
6e21c824 598 if (saveifp) { /* must use old fp? */
f5b9d040 599 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 600 then dup the new fileno down
f5b9d040 601 */
6e21c824 602 if (saveofp) {
f5b9d040 603 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 604 if (saveofp != saveifp) { /* was a socket? */
760ac839 605 PerlIO_close(saveofp);
6e21c824
LW
606 }
607 }
6e60e805 608 if (savefd != fd) {
e934609f 609 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
610 is assigned to (say) STDOUT - for now let dup2() fail
611 and provide the error
612 */
bd4a5668
NIS
613 if (PerlLIO_dup2(fd, savefd) < 0) {
614 (void)PerlIO_close(fp);
615 goto say_false;
616 }
d082dcd6 617#ifdef VMS
6e60e805 618 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
619 char newname[FILENAME_MAX+1];
620 if (PerlIO_getname(fp, newname)) {
621 if (fd == PerlIO_fileno(PerlIO_stdout()))
622 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
623 if (fd == PerlIO_fileno(PerlIO_stderr()))
624 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
625 }
d082dcd6
JH
626 }
627#endif
d0e2cf63
AMS
628
629#if !defined(WIN32)
630 /* PL_fdpid isn't used on Windows, so avoid this useless work.
631 * XXX Probably the same for a lot of other places. */
632 {
633 Pid_t pid;
634 SV *sv;
635
d0e2cf63 636 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 637 SvUPGRADE(sv, SVt_IV);
d0e2cf63 638 pid = SvIVX(sv);
45977657 639 SvIV_set(sv, 0);
d0e2cf63 640 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 641 SvUPGRADE(sv, SVt_IV);
45977657 642 SvIV_set(sv, pid);
d0e2cf63
AMS
643 }
644#endif
645
e212fc47
AMS
646 if (was_fdopen) {
647 /* need to close fp without closing underlying fd */
648 int ofd = PerlIO_fileno(fp);
649 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
650#if defined(HAS_FCNTL) && defined(F_SETFD)
651 /* Assume if we have F_SETFD we have F_GETFD */
652 int coe = fcntl(ofd,F_GETFD);
653#endif
e212fc47
AMS
654 PerlIO_close(fp);
655 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
656#if defined(HAS_FCNTL) && defined(F_SETFD)
657 /* The dup trick has lost close-on-exec on ofd */
658 fcntl(ofd,F_SETFD, coe);
659#endif
e212fc47 660 PerlLIO_close(dupfd);
ecdeb87c 661 }
e212fc47
AMS
662 else
663 PerlIO_close(fp);
6e21c824
LW
664 }
665 fp = saveifp;
760ac839 666 PerlIO_clearerr(fp);
e99cca91 667 fd = PerlIO_fileno(fp);
6e21c824 668 }
a0d0e21e 669#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 670 if (fd >= 0) {
4ee39169 671 dSAVE_ERRNO;
a8710ca1 672 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
4ee39169 673 RESTORE_ERRNO;
a8710ca1 674 }
1462b684 675#endif
8990e307 676 IoIFP(io) = fp;
b931b1d9 677
684bef36 678 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 679 if (writing) {
50952442 680 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 681 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 682 char *s = mode;
3b6c1aba
JH
683 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
684 s++;
a33cf58c 685 *s = 'w';
1feb1812 686 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 687 PerlIO_close(fp);
4608196e 688 IoIFP(io) = NULL;
6e21c824 689 goto say_false;
fe14fcc3 690 }
1462b684
LW
691 }
692 else
8990e307 693 IoOFP(io) = fp;
bf38876a 694 }
a687059c 695 return TRUE;
6e21c824
LW
696
697say_false:
8990e307
LW
698 IoIFP(io) = saveifp;
699 IoOFP(io) = saveofp;
700 IoTYPE(io) = savetype;
6e21c824 701 return FALSE;
a687059c
LW
702}
703
760ac839 704PerlIO *
864dbfa3 705Perl_nextargv(pTHX_ register GV *gv)
a687059c 706{
97aff369 707 dVAR;
79072805 708 register SV *sv;
99b89507 709#ifndef FLEXFILENAMES
c623bd54
LW
710 int filedev;
711 int fileino;
99b89507 712#endif
761237fe
JB
713 Uid_t fileuid;
714 Gid_t filegid;
2d03de9c 715 IO * const io = GvIOp(gv);
fe14fcc3 716
7918f24d
NC
717 PERL_ARGS_ASSERT_NEXTARGV;
718
3280af22 719 if (!PL_argvoutgv)
fafc274c 720 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
18708f5a
GS
721 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
722 IoFLAGS(io) &= ~IOf_START;
7a1c5554 723 if (PL_inplace) {
294b3b39 724 assert(PL_defoutgv);
29a861e7
NC
725 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
726 SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 727 }
18708f5a 728 }
3280af22
NIS
729 if (PL_filemode & (S_ISUID|S_ISGID)) {
730 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 731#ifdef HAS_FCHMOD
c797f2d8
DM
732 if (PL_lastfd != -1)
733 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 734#else
b28d0864 735 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
736#endif
737 }
c797f2d8 738 PL_lastfd = -1;
3280af22 739 PL_filemode = 0;
5c501b37 740 if (!GvAV(gv))
4608196e 741 return NULL;
79072805 742 while (av_len(GvAV(gv)) >= 0) {
85aff577 743 STRLEN oldlen;
79072805 744 sv = av_shift(GvAV(gv));
8990e307 745 SAVEFREESV(sv);
e203899d 746 sv_setsv(GvSVn(gv),sv);
79072805 747 SvSETMAGIC(GvSV(gv));
3280af22 748 PL_oldname = SvPVx(GvSV(gv), oldlen);
4608196e 749 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
3280af22 750 if (PL_inplace) {
79072805 751 TAINT_PROPER("inplace open");
3280af22 752 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC
753 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
754 SVt_PVIO));
a0d0e21e 755 return IoIFP(GvIOp(gv));
c623bd54 756 }
99b89507 757#ifndef FLEXFILENAMES
b28d0864
NIS
758 filedev = PL_statbuf.st_dev;
759 fileino = PL_statbuf.st_ino;
99b89507 760#endif
3280af22
NIS
761 PL_filemode = PL_statbuf.st_mode;
762 fileuid = PL_statbuf.st_uid;
763 filegid = PL_statbuf.st_gid;
764 if (!S_ISREG(PL_filemode)) {
9b387841
NC
765 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
766 "Can't do inplace edit: %s is not a regular file",
767 PL_oldname );
79072805 768 do_close(gv,FALSE);
c623bd54
LW
769 continue;
770 }
c9930541 771 if (*PL_inplace && strNE(PL_inplace, "*")) {
2d03de9c 772 const char *star = strchr(PL_inplace, '*');
2d259d92 773 if (star) {
2d03de9c 774 const char *begin = PL_inplace;
76f68e9b 775 sv_setpvs(sv, "");
2d259d92
CK
776 do {
777 sv_catpvn(sv, begin, star - begin);
3280af22 778 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
779 begin = ++star;
780 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
781 if (*begin)
782 sv_catpv(sv,begin);
2d259d92
CK
783 }
784 else {
3280af22 785 sv_catpv(sv,PL_inplace);
2d259d92 786 }
c623bd54 787#ifndef FLEXFILENAMES
95a20fc0 788 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
789 && PL_statbuf.st_dev == filedev
790 && PL_statbuf.st_ino == fileino)
39e571d4 791#ifdef DJGPP
5f74f29c 792 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 793#endif
f248d071
GS
794 )
795 {
9b387841
NC
796 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
797 "Can't do inplace edit: %"SVf" would not be unique",
798 SVfARG(sv));
79072805 799 do_close(gv,FALSE);
c623bd54
LW
800 continue;
801 }
802#endif
fe14fcc3 803#ifdef HAS_RENAME
2585f9a3 804#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 805 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
9b387841
NC
806 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
807 "Can't rename %s to %"SVf": %s, skipping file",
808 PL_oldname, SVfARG(sv), Strerror(errno));
79072805 809 do_close(gv,FALSE);
c623bd54
LW
810 continue;
811 }
a687059c 812#else
79072805 813 do_close(gv,FALSE);
95a20fc0
SP
814 (void)PerlLIO_unlink(SvPVX_const(sv));
815 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
30fc4309 816 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),TRUE,O_RDONLY,0,NULL);
55497cff 817#endif /* DOSISH */
ff8e2863 818#else
95a20fc0
SP
819 (void)UNLINK(SvPVX_const(sv));
820 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
9b387841
NC
821 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
822 "Can't rename %s to %"SVf": %s, skipping file",
823 PL_oldname, SVfARG(sv), Strerror(errno) );
79072805 824 do_close(gv,FALSE);
c623bd54
LW
825 continue;
826 }
b28d0864 827 (void)UNLINK(PL_oldname);
a687059c
LW
828#endif
829 }
830 else {
c030f24b 831#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 832# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 833 if (UNLINK(PL_oldname) < 0) {
9b387841
NC
834 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
835 "Can't remove %s: %s, skipping file",
836 PL_oldname, Strerror(errno) );
79072805 837 do_close(gv,FALSE);
fe14fcc3
LW
838 continue;
839 }
edc7bc49 840# endif
ff8e2863 841#else
cea2e8a9 842 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 843#endif
a687059c
LW
844 }
845
30fc4309 846 sv_setpvn(sv,PL_oldname,oldlen);
748a9306 847 SETERRNO(0,0); /* in case sprintf set errno */
7f8ee4be
NC
848 if (!Perl_do_openn(aTHX_ PL_argvoutgv, (char*)SvPVX_const(sv),
849 SvCUR(sv), TRUE,
4119ab01 850#ifdef VMS
7f8ee4be 851 O_WRONLY|O_CREAT|O_TRUNC,0,
4119ab01 852#else
7f8ee4be 853 O_WRONLY|O_CREAT|OPEN_EXCL,0600,
4119ab01 854#endif
7f8ee4be 855 NULL, NULL, 0)) {
9b387841
NC
856 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
857 PL_oldname, Strerror(errno) );
79072805 858 do_close(gv,FALSE);
fe14fcc3
LW
859 continue;
860 }
3280af22
NIS
861 setdefout(PL_argvoutgv);
862 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
863 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 864#ifdef HAS_FCHMOD
3280af22 865 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 866#else
b28d0864 867 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
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 }
0876b9a0
KW
1227 else if (ckWARN_d(WARN_UTF8)) {
1228 (void) check_utf8_print((const U8*) tmps, len);
1229 }
7d59b7e4 1230 }
ae798467 1231 else if (DO_UTF8(sv)) {
676f44e7
NC
1232 STRLEN tmplen = len;
1233 bool utf8 = TRUE;
35da51f7 1234 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7
NC
1235 if (!utf8) {
1236 tmpbuf = result;
1237 tmps = (char *) tmpbuf;
1238 len = tmplen;
1239 }
1240 else {
1241 assert((char *)result == tmps);
9b387841 1242 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
21630838
FC
1243 "Wide character in %s",
1244 PL_op ? OP_DESC(PL_op) : "print"
1245 );
0876b9a0
KW
1246 /* Could also check that isn't one of the things to avoid
1247 * in utf8 by using check_utf8_print(), but not doing so,
1248 * since the stream isn't a UTF8 stream */
ae798467
NIS
1249 }
1250 }
e9950d3b
NC
1251 /* To detect whether the process is about to overstep its
1252 * filesize limit we would need getrlimit(). We could then
1253 * also transparently raise the limit with setrlimit() --
1254 * but only until the system hard limit/the filesystem limit,
1255 * at which we would get EPERM. Note that when using buffered
1256 * io the write failure can be delayed until the flush/close. --jhi */
1257 if (len && (PerlIO_write(fp,tmps,len) == 0))
1258 happy = FALSE;
1259 Safefree(tmpbuf);
1260 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 1261 }
a687059c
LW
1262}
1263
79072805 1264I32
0d7d409d 1265Perl_my_stat_flags(pTHX_ const U32 flags)
a687059c 1266{
97aff369 1267 dVAR;
39644a26 1268 dSP;
79072805 1269 IO *io;
2dd78f96 1270 GV* gv;
79072805 1271
533c011a 1272 if (PL_op->op_flags & OPf_REF) {
924508f0 1273 EXTEND(SP,1);
2dd78f96 1274 gv = cGVOP_gv;
748a9306 1275 do_fstat:
5228a96c
SP
1276 if (gv == PL_defgv)
1277 return PL_laststatval;
2dd78f96 1278 io = GvIO(gv);
ad02613c 1279 do_fstat_have_io:
5228a96c
SP
1280 PL_laststype = OP_STAT;
1281 PL_statgv = gv;
76f68e9b 1282 sv_setpvs(PL_statname, "");
5228a96c
SP
1283 if(io) {
1284 if (IoIFP(io)) {
1285 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1286 } else if (IoDIRP(io)) {
3497a01f 1287 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c 1288 } else {
51087808 1289 report_evil_fh(gv);
5228a96c
SP
1290 return (PL_laststatval = -1);
1291 }
1292 } else {
51087808 1293 report_evil_fh(gv);
5228a96c
SP
1294 return (PL_laststatval = -1);
1295 }
a687059c 1296 }
fbb0b3b3
RGS
1297 else if (PL_op->op_private & OPpFT_STACKED) {
1298 return PL_laststatval;
1299 }
a687059c 1300 else {
0bcc34c2 1301 SV* const sv = POPs;
4373e329 1302 const char *s;
4ecd490c 1303 STRLEN len;
79072805 1304 PUTBACK;
094a3eec 1305 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
748a9306
LW
1306 goto do_fstat;
1307 }
ad02613c 1308 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
a45c7426 1309 io = MUTABLE_IO(SvRV(sv));
7f39519f 1310 gv = NULL;
ad02613c
SP
1311 goto do_fstat_have_io;
1312 }
748a9306 1313
0d7d409d 1314 s = SvPV_flags_const(sv, len, flags);
a0714e2c 1315 PL_statgv = NULL;
4ecd490c 1316 sv_setpvn(PL_statname, s, len);
95a20fc0 1317 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1318 PL_laststype = OP_STAT;
1319 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1320 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1321 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1322 return PL_laststatval;
a687059c
LW
1323 }
1324}
1325
fbb0b3b3 1326
79072805 1327I32
0d7d409d 1328Perl_my_lstat_flags(pTHX_ const U32 flags)
c623bd54 1329{
97aff369 1330 dVAR;
0bd48802 1331 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1332 dSP;
79072805 1333 SV *sv;
b16276bb 1334 const char *file;
533c011a 1335 if (PL_op->op_flags & OPf_REF) {
924508f0 1336 EXTEND(SP,1);
638eceb6 1337 if (cGVOP_gv == PL_defgv) {
3280af22 1338 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1339 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1340 return PL_laststatval;
fe14fcc3 1341 }
5d3e98de 1342 if (ckWARN(WARN_IO)) {
d0c0e7dd
FC
1343 Perl_warner(aTHX_ packWARN(WARN_IO),
1344 "Use of -l on filehandle %"HEKf,
1345 HEKfARG(GvENAME_HEK(cGVOP_gv)));
5d3e98de 1346 }
ca867162 1347 return (PL_laststatval = -1);
fe14fcc3 1348 }
1f26655e
FC
1349 else if (PL_op->op_private & OPpFT_STACKED) {
1350 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1351 Perl_croak(aTHX_ no_prev_lstat);
1f26655e
FC
1352 return PL_laststatval;
1353 }
c623bd54 1354
3280af22 1355 PL_laststype = OP_LSTAT;
a0714e2c 1356 PL_statgv = NULL;
79072805
LW
1357 sv = POPs;
1358 PUTBACK;
0d7d409d 1359 file = SvPV_flags_const_nolen(sv, flags);
b16276bb
VP
1360 sv_setpv(PL_statname,file);
1361 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1362 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
9014280d 1363 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1364 return PL_laststatval;
c623bd54
LW
1365}
1366
a0f2c8ec
JD
1367static void
1368S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1369{
1370 const int e = errno;
7918f24d 1371 PERL_ARGS_ASSERT_EXEC_FAILED;
a0f2c8ec
JD
1372 if (ckWARN(WARN_EXEC))
1373 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1374 cmd, Strerror(e));
1375 if (do_report) {
1376 PerlLIO_write(fd, (void*)&e, sizeof(int));
1377 PerlLIO_close(fd);
1378 }
1379}
1380
d5a9bfb0 1381bool
2aa1486d
GS
1382Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1383 int fd, int do_report)
d5a9bfb0 1384{
27da23d5 1385 dVAR;
7918f24d 1386 PERL_ARGS_ASSERT_DO_AEXEC5;
e37778c2 1387#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH
1388 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1389#else
79072805 1390 if (sp > mark) {
360ea906 1391 const char **a;
6136c704 1392 const char *tmps = NULL;
360ea906 1393 Newx(PL_Argv, sp - mark + 1, const char*);
c3c5fad7 1394 a = PL_Argv;
890ce7af 1395
79072805
LW
1396 while (++mark <= sp) {
1397 if (*mark)
360ea906 1398 *a++ = SvPV_nolen_const(*mark);
a687059c
LW
1399 else
1400 *a++ = "";
1401 }
6136c704 1402 *a = NULL;
91b2752f 1403 if (really)
e62f0680 1404 tmps = SvPV_nolen_const(really);
91b2752f
RG
1405 if ((!really && *PL_Argv[0] != '/') ||
1406 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1407 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1408 PERL_FPU_PRE_EXEC
91b2752f 1409 if (really && *tmps)
b4748376 1410 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1411 else
b4748376 1412 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1413 PERL_FPU_POST_EXEC
a0f2c8ec 1414 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
a687059c 1415 }
bee1dbe2 1416 do_execfree();
cd39f2b6 1417#endif
a687059c
LW
1418 return FALSE;
1419}
1420
fe14fcc3 1421void
864dbfa3 1422Perl_do_execfree(pTHX)
ff8e2863 1423{
97aff369 1424 dVAR;
43c5f42d 1425 Safefree(PL_Argv);
4608196e 1426 PL_Argv = NULL;
43c5f42d 1427 Safefree(PL_Cmd);
bd61b366 1428 PL_Cmd = NULL;
ff8e2863
LW
1429}
1430
9555a685 1431#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1432
1433bool
2fbb330f 1434Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1435{
27da23d5 1436 dVAR;
360ea906 1437 register const char **a;
a687059c 1438 register char *s;
15db3ae2 1439 char *buf;
2fbb330f 1440 char *cmd;
2fbb330f 1441 /* Make a copy so we can change it */
6fca0082 1442 const Size_t cmdlen = strlen(incmd) + 1;
7918f24d
NC
1443
1444 PERL_ARGS_ASSERT_DO_EXEC3;
1445
15db3ae2
DM
1446 Newx(buf, cmdlen, char);
1447 cmd = buf;
cfff9797 1448 memcpy(cmd, incmd, cmdlen);
a687059c 1449
748a9306
LW
1450 while (*cmd && isSPACE(*cmd))
1451 cmd++;
1452
a687059c
LW
1453 /* save an extra exec if possible */
1454
bf38876a 1455#ifdef CSH
d05c1ba0 1456 {
0c19750d 1457 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1458 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1459 strnEQ(cmd+PL_cshlen," -c",3)) {
28f0d0ec 1460 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH
1461 s = cmd+PL_cshlen+3;
1462 if (*s == 'f') {
1463 s++;
28f0d0ec 1464 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH
1465 }
1466 if (*s == ' ')
1467 s++;
1468 if (*s++ == '\'') {
0bcc34c2 1469 char * const ncmd = s;
d05c1ba0
JH
1470
1471 while (*s)
1472 s++;
1473 if (s[-1] == '\n')
1474 *--s = '\0';
1475 if (s[-1] == '\'') {
1476 *--s = '\0';
b35112e7 1477 PERL_FPU_PRE_EXEC
7c0dd7ca 1478 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 1479 PERL_FPU_POST_EXEC
d05c1ba0 1480 *s = '\'';
a0f2c8ec 1481 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
15db3ae2 1482 Safefree(buf);
d05c1ba0
JH
1483 return FALSE;
1484 }
1485 }
a687059c
LW
1486 }
1487 }
bf38876a 1488#endif /* CSH */
a687059c
LW
1489
1490 /* see if there are shell metacharacters in it */
1491
748a9306
LW
1492 if (*cmd == '.' && isSPACE(cmd[1]))
1493 goto doshell;
1494
1495 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1496 goto doshell;
1497
294b3b39
AL
1498 s = cmd;
1499 while (isALNUM(*s))
1500 s++; /* catch VAR=val gizmo */
63f2c1e1
LW
1501 if (*s == '=')
1502 goto doshell;
748a9306 1503
a687059c 1504 for (s = cmd; *s; s++) {
d05c1ba0
JH
1505 if (*s != ' ' && !isALPHA(*s) &&
1506 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1507 if (*s == '\n' && !s[1]) {
1508 *s = '\0';
1509 break;
1510 }
603a98b0
IZ
1511 /* handle the 2>&1 construct at the end */
1512 if (*s == '>' && s[1] == '&' && s[2] == '1'
1513 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1514 && (!s[3] || isSPACE(s[3])))
1515 {
6867be6d 1516 const char *t = s + 3;
603a98b0
IZ
1517
1518 while (*t && isSPACE(*t))
1519 ++t;
943bbd07 1520 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1521 s[-2] = '\0';
1522 break;
1523 }
1524 }
a687059c 1525 doshell:
b35112e7 1526 PERL_FPU_PRE_EXEC
7c0dd7ca 1527 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 1528 PERL_FPU_POST_EXEC
a0f2c8ec 1529 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
15db3ae2 1530 Safefree(buf);
a687059c
LW
1531 return FALSE;
1532 }
1533 }
748a9306 1534
360ea906 1535 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
3280af22
NIS
1536 PL_Cmd = savepvn(cmd, s-cmd);
1537 a = PL_Argv;
1538 for (s = PL_Cmd; *s;) {
294b3b39
AL
1539 while (isSPACE(*s))
1540 s++;
a687059c
LW
1541 if (*s)
1542 *(a++) = s;
294b3b39
AL
1543 while (*s && !isSPACE(*s))
1544 s++;
a687059c
LW
1545 if (*s)
1546 *s++ = '\0';
1547 }
6136c704 1548 *a = NULL;
3280af22 1549 if (PL_Argv[0]) {
b35112e7 1550 PERL_FPU_PRE_EXEC
360ea906 1551 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1552 PERL_FPU_POST_EXEC
b1248f16 1553 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1554 do_execfree();
a687059c 1555 goto doshell;
b1248f16 1556 }
a0f2c8ec 1557 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
a687059c 1558 }
ff8e2863 1559 do_execfree();
15db3ae2 1560 Safefree(buf);
a687059c
LW
1561 return FALSE;
1562}
1563
6890e559 1564#endif /* OS2 || WIN32 */
760ac839 1565
79072805 1566I32
864dbfa3 1567Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1568{
97aff369 1569 dVAR;
79072805 1570 register I32 val;
79072805 1571 register I32 tot = 0;
4634a855 1572 const char *const what = PL_op_name[type];
5c144d81 1573 const char *s;
84c7b88c 1574 STRLEN len;
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;
2ea1cce7 1616 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA
1617 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1618#ifdef HAS_FCHMOD
1619 APPLY_TAINT_PROPER();
1620 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1621 tot--;
1622#else
b9c6780e 1623 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1624#endif
1625 }
1626 else {
1627 tot--;
1628 }
1629 }
c4aca7d0 1630 else {
93564729 1631 const char *name = SvPV_nomg_const_nolen(*mark);
c4aca7d0
GA
1632 APPLY_TAINT_PROPER();
1633 if (PerlLIO_chmod(name, val))
1634 tot--;
1635 }
a687059c
LW
1636 }
1637 }
1638 break;
fe14fcc3 1639#ifdef HAS_CHOWN
79072805 1640 case OP_CHOWN:
20408e3c 1641 APPLY_TAINT_PROPER();
79072805 1642 if (sp - mark > 2) {
6867be6d 1643 register I32 val2;
463ee0b2
LW
1644 val = SvIVx(*++mark);
1645 val2 = SvIVx(*++mark);
20408e3c 1646 APPLY_TAINT_PROPER();
a0d0e21e 1647 tot = sp - mark;
79072805 1648 while (++mark <= sp) {
c4aca7d0 1649 GV* gv;
2ea1cce7 1650 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA
1651 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1652#ifdef HAS_FCHOWN
1653 APPLY_TAINT_PROPER();
1654 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1655 tot--;
1656#else
b9c6780e 1657 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1658#endif
1659 }
1660 else {
1661 tot--;
1662 }
1663 }
c4aca7d0 1664 else {
93564729 1665 const char *name = SvPV_nomg_const_nolen(*mark);
c4aca7d0
GA
1666 APPLY_TAINT_PROPER();
1667 if (PerlLIO_chown(name, val, val2))
1668 tot--;
1669 }
a687059c
LW
1670 }
1671 }
1672 break;
b1248f16 1673#endif
a1d180c4 1674/*
dd64f1c3
AD
1675XXX Should we make lchown() directly available from perl?
1676For now, we'll let Configure test for HAS_LCHOWN, but do
1677nothing in the core.
1678 --AD 5/1998
1679*/
fe14fcc3 1680#ifdef HAS_KILL
79072805 1681 case OP_KILL:
20408e3c 1682 APPLY_TAINT_PROPER();
55497cff
PP
1683 if (mark == sp)
1684 break;
84c7b88c 1685 s = SvPVx_const(*++mark, len);
e02bfb16 1686 if (isALPHA(*s)) {
84c7b88c 1687 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
79072805 1688 s += 3;
84c7b88c
BF
1689 len -= 3;
1690 }
1691 if ((val = whichsig_pvn(s, len)) < 0)
1692 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
79072805
LW
1693 }
1694 else
4ea561bc 1695 val = SvIV(*mark);
20408e3c
GS
1696 APPLY_TAINT_PROPER();
1697 tot = sp - mark;
3595fcef
PP
1698#ifdef VMS
1699 /* kill() doesn't do process groups (job trees?) under VMS */
1700 if (val < 0) val = -val;
1701 if (val == SIGKILL) {
1702# include <starlet.h>
1703 /* Use native sys$delprc() to insure that target process is
1704 * deleted; supervisor-mode images don't pay attention to
1705 * CRTL's emulation of Unix-style signals and kill()
1706 */
1707 while (++mark <= sp) {
5f521955
JH
1708 I32 proc;
1709 register unsigned long int __vmssts;
8af710eb 1710 SvGETMAGIC(*mark);
e2c0f81f
DG
1711 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1712 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1713 proc = SvIV_nomg(*mark);
20408e3c 1714 APPLY_TAINT_PROPER();
3595fcef
PP
1715 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1716 tot--;
1717 switch (__vmssts) {
1718 case SS$_NONEXPR:
1719 case SS$_NOSUCHNODE:
1720 SETERRNO(ESRCH,__vmssts);
1721 break;
1722 case SS$_NOPRIV:
1723 SETERRNO(EPERM,__vmssts);
1724 break;
1725 default:
1726 SETERRNO(EVMSERR,__vmssts);
1727 }
1728 }
1729 }
8165faea 1730 PERL_ASYNC_CHECK();
3595fcef
PP
1731 break;
1732 }
1733#endif
79072805
LW
1734 if (val < 0) {
1735 val = -val;
1736 while (++mark <= sp) {
5f521955 1737 I32 proc;
8af710eb 1738 SvGETMAGIC(*mark);
e2c0f81f
DG
1739 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1740 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1741 proc = SvIV_nomg(*mark);
20408e3c 1742 APPLY_TAINT_PROPER();
fe14fcc3 1743#ifdef HAS_KILLPG
3028581b 1744 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1745#else
3028581b 1746 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1747#endif
79072805 1748 tot--;
a687059c 1749 }
79072805
LW
1750 }
1751 else {
1752 while (++mark <= sp) {
5f521955 1753 I32 proc;
8af710eb 1754 SvGETMAGIC(*mark);
e2c0f81f
DG
1755 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1756 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1757 proc = SvIV_nomg(*mark);
20408e3c
GS
1758 APPLY_TAINT_PROPER();
1759 if (PerlProc_kill(proc, val))
79072805 1760 tot--;
a687059c
LW
1761 }
1762 }
8165faea 1763 PERL_ASYNC_CHECK();
a687059c 1764 break;
b1248f16 1765#endif
79072805 1766 case OP_UNLINK:
20408e3c 1767 APPLY_TAINT_PROPER();
79072805
LW
1768 tot = sp - mark;
1769 while (++mark <= sp) {
e62f0680 1770 s = SvPV_nolen_const(*mark);
20408e3c 1771 APPLY_TAINT_PROPER();
3280af22 1772 if (PL_euid || PL_unsafe) {
b8ffc8df 1773 if (UNLINK(s))
a687059c
LW
1774 tot--;
1775 }
1776 else { /* don't let root wipe out directories without -U */
3280af22 1777 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1778 tot--;
1779 else {
b8ffc8df 1780 if (UNLINK(s))
a687059c
LW
1781 tot--;
1782 }
1783 }
1784 }
1785 break;
e96b369d 1786#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1787 case OP_UTIME:
20408e3c 1788 APPLY_TAINT_PROPER();
79072805 1789 if (sp - mark > 2) {
e96b369d
GA
1790#if defined(HAS_FUTIMES)
1791 struct timeval utbuf[2];
1792 void *utbufp = utbuf;
1793#elif defined(I_UTIME) || defined(VMS)
663a0e37 1794 struct utimbuf utbuf;
07409e01 1795 struct utimbuf *utbufp = &utbuf;
663a0e37 1796#else
a687059c 1797 struct {
dd2821f6
GS
1798 Time_t actime;
1799 Time_t modtime;
a687059c 1800 } utbuf;
07409e01 1801 void *utbufp = &utbuf;
663a0e37 1802#endif
a687059c 1803
0bcc34c2
AL
1804 SV* const accessed = *++mark;
1805 SV* const modified = *++mark;
c6f7b413 1806
6ec06612
SB
1807 /* Be like C, and if both times are undefined, let the C
1808 * library figure out what to do. This usually means
1809 * "current time". */
c6f7b413
RS
1810
1811 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1812 utbufp = NULL;
1813 else {
1814 Zero(&utbuf, sizeof utbuf, char);
e96b369d 1815#ifdef HAS_FUTIMES
4ea561bc 1816 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 1817 utbuf[0].tv_usec = 0;
4ea561bc 1818 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA
1819 utbuf[1].tv_usec = 0;
1820#elif defined(BIG_TIME)
4ea561bc
NC
1821 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1822 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 1823#else
4ea561bc
NC
1824 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1825 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 1826#endif
6ec06612 1827 }
4373e329 1828 APPLY_TAINT_PROPER();
79072805
LW
1829 tot = sp - mark;
1830 while (++mark <= sp) {
e96b369d 1831 GV* gv;
64617da9 1832 if ((gv = MAYBE_DEREF_GV(*mark))) {
e96b369d
GA
1833 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1834#ifdef HAS_FUTIMES
1835 APPLY_TAINT_PROPER();
8b7231d9
SP
1836 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1837 (struct timeval *) utbufp))
e96b369d
GA
1838 tot--;
1839#else
1840 Perl_die(aTHX_ PL_no_func, "futimes");
1841#endif
1842 }
1843 else {
1844 tot--;
1845 }
1846 }
e96b369d 1847 else {
64617da9 1848 const char * const name = SvPV_nomg_const_nolen(*mark);
e96b369d
GA
1849 APPLY_TAINT_PROPER();
1850#ifdef HAS_FUTIMES
8b7231d9 1851 if (utimes(name, (struct timeval *)utbufp))
e96b369d
GA
1852#else
1853 if (PerlLIO_utime(name, utbufp))
1854#endif
1855 tot--;
1856 }
1857
a687059c 1858 }
a687059c
LW
1859 }
1860 else
79072805 1861 tot = 0;
a687059c 1862 break;
a0d0e21e 1863#endif
a687059c
LW
1864 }
1865 return tot;
20408e3c 1866
20408e3c 1867#undef APPLY_TAINT_PROPER
a687059c
LW
1868}
1869
1870/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1871#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1872bool
ae1951c1
NC
1873Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1874/* effective is a flag, true for EUID, or for checking if the effective gid
1875 * is in the list of groups returned from getgroups().
1876 */
a687059c 1877{
97aff369 1878 dVAR;
7918f24d
NC
1879
1880 PERL_ARGS_ASSERT_CANDO;
1881
bee1dbe2 1882#ifdef DOSISH
fe14fcc3
LW
1883 /* [Comments and code from Len Reed]
1884 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1885 * to write-protected files. The execute permission bit is set
486ec47a 1886 * by the Microsoft C library stat() function for the following:
fe14fcc3
LW
1887 * .exe files
1888 * .com files
1889 * .bat files
1890 * directories
1891 * All files and directories are readable.
1892 * Directories and special files, e.g. "CON", cannot be
1893 * write-protected.
1894 * [Comment by Tom Dinger -- a directory can have the write-protect
1895 * bit set in the file system, but DOS permits changes to
1896 * the directory anyway. In addition, all bets are off
1897 * here for networked software, such as Novell and
1898 * Sun's PC-NFS.]
1899 */
1900
bee1dbe2
LW
1901 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1902 * too so it will actually look into the files for magic numbers
1903 */
7f4774ae 1904 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1905
55497cff 1906#else /* ! DOSISH */
b595cd4b
RU
1907# ifdef __CYGWIN__
1908 if (ingroup(544,effective)) { /* member of Administrators */
1909# else
3280af22 1910 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
b595cd4b 1911# endif
7f4774ae 1912 if (mode == S_IXUSR) {
c623bd54 1913 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1914 return TRUE;
1915 }
1916 else
1917 return TRUE; /* root reads and writes anything */
1918 return FALSE;
1919 }
3280af22 1920 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
7f4774ae 1921 if (statbufp->st_mode & mode)
a687059c
LW
1922 return TRUE; /* ok as "user" */
1923 }
d8eceb89 1924 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 1925 if (statbufp->st_mode & mode >> 3)
a687059c
LW
1926 return TRUE; /* ok as "group" */
1927 }
7f4774ae 1928 else if (statbufp->st_mode & mode >> 6)
a687059c
LW
1929 return TRUE; /* ok as "other" */
1930 return FALSE;
55497cff 1931#endif /* ! DOSISH */
a687059c 1932}
a0d0e21e 1933#endif /* ! VMS */
a687059c 1934
1f676739 1935static bool
0da8eb3a 1936S_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 1937{
97aff369 1938 dVAR;
3280af22 1939 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1940 return TRUE;
fe14fcc3 1941#ifdef HAS_GETGROUPS
a687059c 1942 {
331b57bc 1943 Groups_t *gary = NULL;
79072805 1944 I32 anum;
331b57bc 1945 bool rc = FALSE;
a687059c 1946
331b57bc
SP
1947 anum = getgroups(0, gary);
1948 Newx(gary, anum, Groups_t);
1949 anum = getgroups(anum, gary);
a687059c 1950 while (--anum >= 0)
331b57bc
SP
1951 if (gary[anum] == testgid) {
1952 rc = TRUE;
1953 break;
1954 }
1955
1956 Safefree(gary);
1957 return rc;
a687059c 1958 }
c685562b 1959#else
a687059c 1960 return FALSE;
cd39f2b6 1961#endif
a687059c 1962}
c2ab57d4 1963
fe14fcc3 1964#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1965
79072805 1966I32
864dbfa3 1967Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1968{
97aff369 1969 dVAR;
0bcc34c2 1970 const key_t key = (key_t)SvNVx(*++mark);
c3312966 1971 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
6867be6d 1972 const I32 flags = SvIVx(*++mark);
294a48e9 1973
7918f24d 1974 PERL_ARGS_ASSERT_DO_IPCGET;
294a48e9 1975 PERL_UNUSED_ARG(sp);
c2ab57d4 1976
748a9306 1977 SETERRNO(0,0);
c2ab57d4
LW
1978 switch (optype)
1979 {
fe14fcc3 1980#ifdef HAS_MSG
79072805 1981 case OP_MSGGET:
c2ab57d4 1982 return msgget(key, flags);
e5d73d77 1983#endif
fe14fcc3 1984#ifdef HAS_SEM
79072805 1985 case OP_SEMGET:
c3312966 1986 return semget(key, (int) SvIV(nsv), flags);
e5d73d77 1987#endif
fe14fcc3 1988#ifdef HAS_SHM
79072805 1989 case OP_SHMGET:
c3312966 1990 return shmget(key, (size_t) SvUV(nsv), flags);
e5d73d77 1991#endif
fe14fcc3 1992#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1993 default:
fe13d51d 1994 /* diag_listed_as: msg%s not implemented */
cea2e8a9 1995 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1996#endif
c2ab57d4
LW
1997 }
1998 return -1; /* should never happen */
1999}
2000
79072805 2001I32
864dbfa3 2002Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2003{
97aff369 2004 dVAR;
c2ab57d4 2005 char *a;
a0d0e21e 2006 I32 ret = -1;
6867be6d 2007 const I32 id = SvIVx(*++mark);
95b63a38 2008#ifdef Semctl
6867be6d 2009 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2010#endif
6867be6d 2011 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
2012 SV * const astr = *++mark;
2013 STRLEN infosize = 0;
2014 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2015
7918f24d 2016 PERL_ARGS_ASSERT_DO_IPCCTL;
0bcc34c2 2017 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
2018
2019 switch (optype)
2020 {
fe14fcc3 2021#ifdef HAS_MSG
79072805 2022 case OP_MSGCTL:
c2ab57d4
LW
2023 if (cmd == IPC_STAT || cmd == IPC_SET)
2024 infosize = sizeof(struct msqid_ds);
2025 break;
e5d73d77 2026#endif
fe14fcc3 2027#ifdef HAS_SHM
79072805 2028 case OP_SHMCTL:
c2ab57d4
LW
2029 if (cmd == IPC_STAT || cmd == IPC_SET)
2030 infosize = sizeof(struct shmid_ds);
2031 break;
e5d73d77 2032#endif
fe14fcc3 2033#ifdef HAS_SEM
79072805 2034 case OP_SEMCTL:
39398f3f 2035#ifdef Semctl
c2ab57d4
LW
2036 if (cmd == IPC_STAT || cmd == IPC_SET)
2037 infosize = sizeof(struct semid_ds);
2038 else if (cmd == GETALL || cmd == SETALL)
2039 {
8e591e46 2040 struct semid_ds semds;
bd89102f 2041 union semun semun;
e6f0bdd6
GS
2042#ifdef EXTRA_F_IN_SEMUN_BUF
2043 semun.buff = &semds;
2044#else
84902520 2045 semun.buf = &semds;
e6f0bdd6 2046#endif
c2ab57d4 2047 getinfo = (cmd == GETALL);
9b89d93d
GB
2048 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2049 return -1;
6e21c824
LW
2050 infosize = semds.sem_nsems * sizeof(short);
2051 /* "short" is technically wrong but much more portable
2052 than guessing about u_?short(_t)? */
c2ab57d4 2053 }
39398f3f 2054#else
fe13d51d 2055 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2056 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2057#endif
c2ab57d4 2058 break;
e5d73d77 2059#endif
fe14fcc3 2060#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2061 default:
fe13d51d 2062 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2063 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2064#endif
c2ab57d4
LW
2065 }
2066
2067 if (infosize)
2068 {
2069 if (getinfo)
2070 {
93524f2b 2071 SvPV_force_nolen(astr);
a0d0e21e 2072 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
2073 }
2074 else
2075 {
93524f2b 2076 STRLEN len;
463ee0b2
LW
2077 a = SvPV(astr, len);
2078 if (len != infosize)
cea2e8a9 2079 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
2080 PL_op_desc[optype],
2081 (unsigned long)len,
2082 (long)infosize);
c2ab57d4
LW
2083 }
2084 }
2085 else
2086 {
0bcc34c2 2087 const IV i = SvIV(astr);
56431972 2088 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2089 }
748a9306 2090 SETERRNO(0,0);
c2ab57d4
LW
2091 switch (optype)
2092 {
fe14fcc3 2093#ifdef HAS_MSG
79072805 2094 case OP_MSGCTL:
bee1dbe2 2095 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2096 break;
e5d73d77 2097#endif
fe14fcc3 2098#ifdef HAS_SEM
bd89102f 2099 case OP_SEMCTL: {
39398f3f 2100#ifdef Semctl
bd89102f
AD
2101 union semun unsemds;
2102
e6f0bdd6
GS
2103#ifdef EXTRA_F_IN_SEMUN_BUF
2104 unsemds.buff = (struct semid_ds *)a;
2105#else
bd89102f 2106 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2107#endif
bd89102f 2108 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2109#else
fe13d51d 2110 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2111 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2112#endif
bd89102f 2113 }
c2ab57d4 2114 break;
e5d73d77 2115#endif
fe14fcc3 2116#ifdef HAS_SHM
79072805 2117 case OP_SHMCTL:
bee1dbe2 2118 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2119 break;
e5d73d77 2120#endif
c2ab57d4
LW
2121 }
2122 if (getinfo && ret >= 0) {
79072805
LW
2123 SvCUR_set(astr, infosize);
2124 *SvEND(astr) = '\0';
a0d0e21e 2125 SvSETMAGIC(astr);
c2ab57d4
LW
2126 }
2127 return ret;
2128}
2129
79072805 2130I32
864dbfa3 2131Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2132{
97aff369 2133 dVAR;
fe14fcc3 2134#ifdef HAS_MSG
463ee0b2 2135 STRLEN len;
6867be6d 2136 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2137 SV * const mstr = *++mark;
2138 const I32 flags = SvIVx(*++mark);
2139 const char * const mbuf = SvPV_const(mstr, len);
2140 const I32 msize = len - sizeof(long);
2141
7918f24d 2142 PERL_ARGS_ASSERT_DO_MSGSND;
890ce7af 2143 PERL_UNUSED_ARG(sp);
c2ab57d4 2144
0bcc34c2 2145 if (msize < 0)
cea2e8a9 2146 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2147 SETERRNO(0,0);
bee1dbe2 2148 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2149#else
2d51fa4d
RGS
2150 PERL_UNUSED_ARG(sp);
2151 PERL_UNUSED_ARG(mark);
fe13d51d 2152 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2153 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2154#endif
c2ab57d4
LW
2155}
2156
79072805 2157I32
864dbfa3 2158Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2159{
fe14fcc3 2160#ifdef HAS_MSG
97aff369 2161 dVAR;
c2ab57d4
LW
2162 char *mbuf;
2163 long mtype;
6867be6d 2164 I32 msize, flags, ret;
6867be6d 2165 const I32 id = SvIVx(*++mark);
0bcc34c2 2166 SV * const mstr = *++mark;
7918f24d
NC
2167
2168 PERL_ARGS_ASSERT_DO_MSGRCV;
890ce7af 2169 PERL_UNUSED_ARG(sp);
79072805 2170
c2e66d9e
GS
2171 /* suppress warning when reading into undef var --jhi */
2172 if (! SvOK(mstr))
76f68e9b 2173 sv_setpvs(mstr, "");
463ee0b2
LW
2174 msize = SvIVx(*++mark);
2175 mtype = (long)SvIVx(*++mark);
2176 flags = SvIVx(*++mark);
93524f2b 2177 SvPV_force_nolen(mstr);
a0d0e21e 2178 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2179
748a9306 2180 SETERRNO(0,0);
bee1dbe2 2181 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2182 if (ret >= 0) {
79072805
LW
2183 SvCUR_set(mstr, sizeof(long)+ret);
2184 *SvEND(mstr) = '\0';
41d6edb2
JH
2185#ifndef INCOMPLETE_TAINTS
2186 /* who knows who has been playing with this message? */
2187 SvTAINTED_on(mstr);
2188#endif
c2ab57d4
LW
2189 }
2190 return ret;
e5d73d77 2191#else
2d51fa4d
RGS
2192 PERL_UNUSED_ARG(sp);
2193 PERL_UNUSED_ARG(mark);
fe13d51d 2194 /* diag_listed_as: msg%s not implemented */
cea2e8a9 2195 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2196#endif
c2ab57d4
LW
2197}
2198
79072805 2199I32
864dbfa3 2200Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2201{
fe14fcc3 2202#ifdef HAS_SEM
97aff369 2203 dVAR;
463ee0b2 2204 STRLEN opsize;
6867be6d 2205 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2206 SV * const opstr = *++mark;
2207 const char * const opbuf = SvPV_const(opstr, opsize);
7918f24d
NC
2208
2209 PERL_ARGS_ASSERT_DO_SEMOP;
890ce7af 2210 PERL_UNUSED_ARG(sp);
c2ab57d4 2211
248ff010
NC
2212 if (opsize < 3 * SHORTSIZE
2213 || (opsize % (3 * SHORTSIZE))) {
93189314 2214 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2215 return -1;
2216 }
748a9306 2217 SETERRNO(0,0);
248ff010
NC
2218 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2219 {
6867be6d 2220 const int nsops = opsize / (3 * sizeof (short));
248ff010 2221 int i = nsops;
0bcc34c2 2222 short * const ops = (short *) opbuf;
248ff010
NC
2223 short *o = ops;
2224 struct sembuf *temps, *t;
2225 I32 result;
2226
a02a5408 2227 Newx (temps, nsops, struct sembuf);
248ff010
NC
2228 t = temps;
2229 while (i--) {
2230 t->sem_num = *o++;
2231 t->sem_op = *o++;
2232 t->sem_flg = *o++;
2233 t++;
2234 }
2235 result = semop(id, temps, nsops);
2236 t = temps;
2237 o = ops;
2238 i = nsops;
2239 while (i--) {
2240 *o++ = t->sem_num;
2241 *o++ = t->sem_op;
2242 *o++ = t->sem_flg;
2243 t++;
2244 }
2245 Safefree(temps);
2246 return result;
2247 }
e5d73d77 2248#else
fe13d51d 2249 /* diag_listed_as: sem%s not implemented */
cea2e8a9 2250 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2251#endif
c2ab57d4
LW
2252}
2253
79072805 2254I32
864dbfa3 2255Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2256{
fe14fcc3 2257#ifdef HAS_SHM
97aff369 2258 dVAR;
4373e329 2259 char *shm;
c2ab57d4 2260 struct shmid_ds shmds;
6867be6d 2261 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2262 SV * const mstr = *++mark;
2263 const I32 mpos = SvIVx(*++mark);
2264 const I32 msize = SvIVx(*++mark);
7918f24d
NC
2265
2266 PERL_ARGS_ASSERT_DO_SHMIO;
890ce7af 2267 PERL_UNUSED_ARG(sp);
c2ab57d4 2268
748a9306 2269 SETERRNO(0,0);
c2ab57d4
LW
2270 if (shmctl(id, IPC_STAT, &shmds) == -1)
2271 return -1;
7f39519f
NC
2272 if (mpos < 0 || msize < 0
2273 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
93189314 2274 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2275 return -1;
2276 }
d4c19fe8 2277 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2278 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2279 return -1;
79072805 2280 if (optype == OP_SHMREAD) {
c8ae91a8 2281 char *mbuf;
9f538c04
GS
2282 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2283 if (! SvOK(mstr))
76f68e9b 2284 sv_setpvs(mstr, "");
0f18891d 2285 SvUPGRADE(mstr, SVt_PV);
af8ff727 2286 SvPOK_only(mstr);
bb7a0f54 2287 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2288
bee1dbe2 2289 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2290 SvCUR_set(mstr, msize);
2291 *SvEND(mstr) = '\0';
a0d0e21e 2292 SvSETMAGIC(mstr);
d929ce6f
JH
2293#ifndef INCOMPLETE_TAINTS
2294 /* who knows who has been playing with this shared memory? */
2295 SvTAINTED_on(mstr);
2296#endif
c2ab57d4
LW
2297 }
2298 else {
93524f2b 2299 STRLEN len;
c2ab57d4 2300
93524f2b 2301 const char *mbuf = SvPV_const(mstr, len);
027aa12d 2302 const I32 n = ((I32)len > msize) ? msize : (I32)len;
bee1dbe2 2303 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2304 if (n < msize)
bee1dbe2 2305 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2306 }
2307 return shmdt(shm);
e5d73d77 2308#else
fe13d51d 2309 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2310 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2311#endif
c2ab57d4
LW
2312}
2313
fe14fcc3 2314#endif /* SYSV IPC */
4e35701f 2315
0d44d22b 2316/*
ccfc67b7
JH
2317=head1 IO Functions
2318
0d44d22b
NC
2319=for apidoc start_glob
2320
2321Function called by C<do_readline> to spawn a glob (or do the glob inside
2322perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2323this glob starter is only used by miniperl during the build process.
0d44d22b 2324Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2325
0d44d22b
NC
2326=cut
2327*/
2328
2329PerlIO *
2330Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2331{
27da23d5 2332 dVAR;
561b68a9 2333 SV * const tmpcmd = newSV(0);
0d44d22b 2334 PerlIO *fp;
7918f24d
NC
2335
2336 PERL_ARGS_ASSERT_START_GLOB;
2337
0d44d22b
NC
2338 ENTER;
2339 SAVEFREESV(tmpcmd);
2340#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2341 /* since spawning off a process is a real performance hit */
dca5a913
JM
2342
2343PerlIO *
2344Perl_vms_start_glob
2345 (pTHX_ SV *tmpglob,
2346 IO *io);
2347
49a7a762 2348 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2349
0d44d22b 2350#else /* !VMS */
0d44d22b
NC
2351#ifdef DOSISH
2352#ifdef OS2
2353 sv_setpv(tmpcmd, "for a in ");
2354 sv_catsv(tmpcmd, tmpglob);
2355 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2356#else
2357#ifdef DJGPP
2358 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2359 sv_catsv(tmpcmd, tmpglob);
2360#else
2361 sv_setpv(tmpcmd, "perlglob ");
2362 sv_catsv(tmpcmd, tmpglob);
2363 sv_catpv(tmpcmd, " |");
2364#endif /* !DJGPP */
2365#endif /* !OS2 */
2366#else /* !DOSISH */
2367#if defined(CSH)
2368 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2369 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2370 sv_catsv(tmpcmd, tmpglob);
2371 sv_catpv(tmpcmd, "' 2>/dev/null |");
2372#else
2373 sv_setpv(tmpcmd, "echo ");
2374 sv_catsv(tmpcmd, tmpglob);
2375#if 'z' - 'a' == 25
2376 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2377#else
2378 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2379#endif
2380#endif /* !CSH */
2381#endif /* !DOSISH */
a3342be3 2382 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
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 */