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Remove gete?[ug]id caching
[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,
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) {
5637ef5b
NC
152 Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld",
153 (long) num_svs);
3dccc55c
JH
154 }
155 /* It's not always
156
157 O_RDONLY 0
158 O_WRONLY 1
159 O_RDWR 2
160
161 It might be (in OS/390 and Mac OS Classic it is)
162
163 O_WRONLY 1
164 O_RDONLY 2
165 O_RDWR 3
166
167 This means that simple & with O_RDWR would look
168 like O_RDONLY is present. Therefore we have to
169 be more careful.
170 */
171 if ((ismodifying = (rawmode & modifyingmode))) {
172 if ((ismodifying & O_WRONLY) == O_WRONLY ||
173 (ismodifying & O_RDWR) == O_RDWR ||
174 (ismodifying & (O_CREAT|appendtrunc)))
175 TAINT_PROPER("sysopen");
176 }
3b6c1aba 177 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
b931b1d9 178
09458382 179#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
b94c04ac 180 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
5ff3f7a4
GS
181#endif
182
06c7082d 183 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
ee518936 184
59cd0e26 185 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
ee518936
NIS
186 num_svs = 1;
187 svp = &namesv;
bd61b366 188 type = NULL;
b94c04ac 189 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
a687059c 190 }
c07a80fd 191 else {
b931b1d9 192 /* Regular (non-sys) open */
2fbb330f 193 char *name;
faecd977 194 STRLEN olen = len;
b931b1d9
NIS
195 char *tend;
196 int dodup = 0;
c07a80fd 197
2fbb330f 198 type = savepvn(oname, len);
b931b1d9 199 tend = type+len;
faecd977 200 SAVEFREEPV(type);
eb649f83
AMS
201
202 /* Lose leading and trailing white space */
294b3b39
AL
203 while (isSPACE(*type))
204 type++;
eb649f83
AMS
205 while (tend > type && isSPACE(tend[-1]))
206 *--tend = '\0';
207
6170680b 208 if (num_svs) {
c2be40b1 209 /* New style explicit name, type is just mode and layer info */
9a869a14 210#ifdef USE_STDIO
2fbb330f 211 if (SvROK(*svp) && !strchr(oname,'&')) {
9a869a14
RGS
212 if (ckWARN(WARN_IO))
213 Perl_warner(aTHX_ packWARN(WARN_IO),
214 "Can't open a reference");
93189314 215 SETERRNO(EINVAL, LIB_INVARG);
9a869a14
RGS
216 goto say_false;
217 }
218#endif /* USE_STDIO */
d71e3dc3
DM
219 name = (SvOK(*svp) || SvGMAGICAL(*svp)) ?
220 savesvpv (*svp) : savepvs ("");
faecd977 221 SAVEFREEPV(name);
6170680b 222 }
faecd977 223 else {
faecd977 224 name = type;
b931b1d9 225 len = tend-type;
faecd977 226 }
6170680b 227 IoTYPE(io) = *type;
516a5887 228 if ((*type == IoTYPE_RDWR) && /* scary */
01a8ea99 229 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
516a5887 230 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
c2be40b1 231 TAINT_PROPER("open");
6170680b 232 mode[1] = *type++;
c07a80fd 233 writing = 1;
a687059c 234 }
c07a80fd 235
9f37169a 236 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS
237 if (num_svs) {
238 if (type[1] != IoTYPE_STD) {
c2be40b1 239 unknown_open_mode:
b931b1d9
NIS
240 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
241 }
242 type++;
6170680b 243 }
294b3b39
AL
244 do {
245 type++;
246 } while (isSPACE(*type));
faecd977 247 if (!num_svs) {
6170680b 248 name = type;
b931b1d9 249 len = tend-type;
faecd977 250 }
4a7d1889
NIS
251 if (*name == '\0') {
252 /* command is missing 19990114 */
06eaf0bc 253 if (ckWARN(WARN_PIPE))
9014280d 254 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
255 errno = EPIPE;
256 goto say_false;
257 }
f27977c3 258 if (!(*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP
259 TAINT_ENV();
260 TAINT_PROPER("piped open");
b931b1d9 261 if (!num_svs && name[len-1] == '|') {
faecd977 262 name[--len] = '\0' ;
599cee73 263 if (ckWARN(WARN_PIPE))
9014280d 264 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 265 }
a1d180c4 266 mode[0] = 'w';
c07a80fd 267 writing = 1;
0c19750d 268 if (out_raw)
5686ee58 269 mode[1] = 'b';
0c19750d 270 else if (out_crlf)
5686ee58 271 mode[1] = 't';
4a7d1889
NIS
272 if (num_svs > 1) {
273 fp = PerlProc_popen_list(mode, num_svs, svp);
274 }
275 else {
276 fp = PerlProc_popen(name,mode);
277 }
1771866f
NIS
278 if (num_svs) {
279 if (*type) {
280 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
281 goto say_false;
282 }
283 }
284 }
c2be40b1 285 } /* IoTYPE_PIPE */
9f37169a 286 else if (*type == IoTYPE_WRONLY) {
c07a80fd 287 TAINT_PROPER("open");
6170680b 288 type++;
9f37169a
JH
289 if (*type == IoTYPE_WRONLY) {
290 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 291 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 292 type++;
a0d0e21e 293 }
ee518936 294 else {
c07a80fd 295 mode[0] = 'w';
ee518936 296 }
c07a80fd
PP
297 writing = 1;
298
0c19750d 299 if (out_raw)
5686ee58 300 mode[1] = 'b';
0c19750d 301 else if (out_crlf)
5686ee58 302 mode[1] = 't';
6170680b 303 if (*type == '&') {
c07a80fd 304 duplicity:
ecdeb87c 305 dodup = PERLIO_DUP_FD;
e620cd72
NIS
306 type++;
307 if (*type == '=') {
c07a80fd 308 dodup = 0;
e620cd72 309 type++;
4a7d1889 310 }
ee518936 311 if (!num_svs && !*type && supplied_fp) {
4a7d1889 312 /* "<+&" etc. is used by typemaps */
c07a80fd 313 fp = supplied_fp;
ee518936 314 }
a0d0e21e 315 else {
35da51f7 316 PerlIO *that_fp = NULL;
e620cd72 317 if (num_svs > 1) {
fe13d51d 318 /* diag_listed_as: More than one argument to '%s' open */
e620cd72
NIS
319 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
320 }
294b3b39
AL
321 while (isSPACE(*type))
322 type++;
1771866f 323 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 324 fd = SvUV(*svp);
24a7a40d 325 num_svs = 0;
ee518936 326 }
e620cd72 327 else if (isDIGIT(*type)) {
e620cd72
NIS
328 fd = atoi(type);
329 }
c07a80fd 330 else {
e1ec3a88 331 const IO* thatio;
e620cd72
NIS
332 if (num_svs) {
333 thatio = sv_2io(*svp);
334 }
335 else {
35da51f7 336 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 337 0, SVt_PVIO);
e620cd72
NIS
338 thatio = GvIO(thatgv);
339 }
c07a80fd 340 if (!thatio) {
6e21c824 341#ifdef EINVAL
93189314 342 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 343#endif
c07a80fd
PP
344 goto say_false;
345 }
f4e789af 346 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
347 /* Flush stdio buffer before dup. --mjd
348 * Unfortunately SEEK_CURing 0 seems to
349 * be optimized away on most platforms;
350 * only Solaris and Linux seem to flush
351 * on that. --jhi */
2c534a3f
NC
352#ifdef USE_SFIO
353 /* sfio fails to clear error on next
354 sfwrite, contrary to documentation.
04d26ece 355 -- Nicholas Clark */
ecdeb87c
NIS
356 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
357 PerlIO_clearerr(that_fp);
2c534a3f 358#endif
7211d486
JH
359 /* On the other hand, do all platforms
360 * take gracefully to flushing a read-only
361 * filehandle? Perhaps we should do
362 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
363 PerlIO_flush(that_fp);
364 fd = PerlIO_fileno(that_fp);
0759c907
JH
365 /* When dup()ing STDIN, STDOUT or STDERR
366 * explicitly set appropriate access mode */
f4e789af
NC
367 if (that_fp == PerlIO_stdout()
368 || that_fp == PerlIO_stderr())
0759c907 369 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 370 else if (that_fp == PerlIO_stdin())
0759c907
JH
371 IoTYPE(io) = IoTYPE_RDONLY;
372 /* When dup()ing a socket, say result is
373 * one as well */
374 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 375 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
376 }
377 else
378 fd = -1;
a0d0e21e 379 }
ee518936 380 if (!num_svs)
bd61b366 381 type = NULL;
ecdeb87c
NIS
382 if (that_fp) {
383 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
384 }
385 else {
c07a80fd 386 if (dodup)
ecdeb87c
NIS
387 fd = PerlLIO_dup(fd);
388 else
389 was_fdopen = TRUE;
390 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 391 if (dodup && fd >= 0)
ecdeb87c
NIS
392 PerlLIO_close(fd);
393 }
faecd977 394 }
c07a80fd 395 }
ee518936 396 } /* & */
c07a80fd 397 else {
294b3b39
AL
398 while (isSPACE(*type))
399 type++;
b931b1d9 400 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 401 type++;
760ac839 402 fp = PerlIO_stdout();
50952442 403 IoTYPE(io) = IoTYPE_STD;
7cf31beb 404 if (num_svs > 1) {
fe13d51d 405 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS
406 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
407 }
c07a80fd
PP
408 }
409 else {
ee518936 410 if (!num_svs) {
59cd0e26 411 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
412 num_svs = 1;
413 svp = &namesv;
bd61b366 414 type = NULL;
ee518936 415 }
6e60e805 416 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 417 }
ee518936 418 } /* !& */
7e72d509
JH
419 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
420 goto unknown_open_mode;
c2be40b1 421 } /* IoTYPE_WRONLY */
9f37169a 422 else if (*type == IoTYPE_RDONLY) {
294b3b39
AL
423 do {
424 type++;
425 } while (isSPACE(*type));
bf38876a 426 mode[0] = 'r';
0c19750d 427 if (in_raw)
5686ee58 428 mode[1] = 'b';
0c19750d 429 else if (in_crlf)
5686ee58 430 mode[1] = 't';
6170680b 431 if (*type == '&') {
bf38876a 432 goto duplicity;
6170680b 433 }
b931b1d9 434 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 435 type++;
760ac839 436 fp = PerlIO_stdin();
50952442 437 IoTYPE(io) = IoTYPE_STD;
7cf31beb 438 if (num_svs > 1) {
fe13d51d 439 /* diag_listed_as: More than one argument to '%s' open */
7cf31beb
NIS
440 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
441 }
a687059c 442 }
ee518936
NIS
443 else {
444 if (!num_svs) {
59cd0e26 445 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
446 num_svs = 1;
447 svp = &namesv;
bd61b366 448 type = NULL;
ee518936 449 }
6e60e805 450 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 451 }
7e72d509
JH
452 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
453 goto unknown_open_mode;
c2be40b1
JH
454 } /* IoTYPE_RDONLY */
455 else if ((num_svs && /* '-|...' or '...|' */
456 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 457 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 458 if (num_svs) {
b931b1d9 459 type += 2; /* skip over '-|' */
6170680b
IZ
460 }
461 else {
b931b1d9
NIS
462 *--tend = '\0';
463 while (tend > type && isSPACE(tend[-1]))
464 *--tend = '\0';
a6e20a40
AL
465 for (; isSPACE(*type); type++)
466 ;
6170680b 467 name = type;
b931b1d9 468 len = tend-type;
6170680b 469 }
4a7d1889
NIS
470 if (*name == '\0') {
471 /* command is missing 19990114 */
06eaf0bc 472 if (ckWARN(WARN_PIPE))
9014280d 473 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
474 errno = EPIPE;
475 goto say_false;
476 }
770526c1 477 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
478 TAINT_ENV();
479 TAINT_PROPER("piped open");
a1d180c4 480 mode[0] = 'r';
0c19750d 481
0c19750d 482 if (in_raw)
5686ee58 483 mode[1] = 'b';
0c19750d 484 else if (in_crlf)
5686ee58 485 mode[1] = 't';
0c19750d 486
4a7d1889
NIS
487 if (num_svs > 1) {
488 fp = PerlProc_popen_list(mode,num_svs,svp);
489 }
e620cd72 490 else {
4a7d1889
NIS
491 fp = PerlProc_popen(name,mode);
492 }
50952442 493 IoTYPE(io) = IoTYPE_PIPE;
1771866f 494 if (num_svs) {
294b3b39
AL
495 while (isSPACE(*type))
496 type++;
1771866f
NIS
497 if (*type) {
498 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
499 goto say_false;
500 }
501 }
502 }
a687059c 503 }
c2be40b1 504 else { /* layer(Args) */
6170680b 505 if (num_svs)
c2be40b1 506 goto unknown_open_mode;
6170680b 507 name = type;
50952442 508 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
509 for (; isSPACE(*name); name++)
510 ;
88b61e10 511 mode[0] = 'r';
0c19750d 512
0c19750d 513 if (in_raw)
5686ee58 514 mode[1] = 'b';
0c19750d 515 else if (in_crlf)
5686ee58 516 mode[1] = 't';
0c19750d 517
770526c1 518 if (*name == '-' && name[1] == '\0') {
760ac839 519 fp = PerlIO_stdin();
50952442 520 IoTYPE(io) = IoTYPE_STD;
a687059c 521 }
16fe6d59 522 else {
ee518936 523 if (!num_svs) {
59cd0e26 524 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
ee518936
NIS
525 num_svs = 1;
526 svp = &namesv;
bd61b366 527 type = NULL;
ee518936 528 }
6e60e805 529 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 530 }
a687059c
LW
531 }
532 }
bee1dbe2 533 if (!fp) {
ce44635a 534 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 535 && strchr(oname, '\n')
ce44635a 536
041457d9 537 )
9014280d 538 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 539 goto say_false;
bee1dbe2 540 }
a00b5bd3
NIS
541
542 if (ckWARN(WARN_IO)) {
543 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
544 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 545 Perl_warner(aTHX_ packWARN(WARN_IO),
d0c0e7dd
FC
546 "Filehandle STD%s reopened as %"HEKf
547 " only for input",
97828cef 548 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
d0c0e7dd 549 HEKfARG(GvENAME_HEK(gv)));
a00b5bd3 550 }
ee518936 551 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 552 Perl_warner(aTHX_ packWARN(WARN_IO),
d0c0e7dd
FC
553 "Filehandle STDIN reopened as %"HEKf" only for output",
554 HEKfARG(GvENAME_HEK(gv))
555 );
a00b5bd3
NIS
556 }
557 }
558
e99cca91 559 fd = PerlIO_fileno(fp);
e934609f
JH
560 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
561 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
562 * type probe for socket-ness.
563 */
564 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
565 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
566 /* If PerlIO claims to have fd we had better be able to fstat() it. */
567 (void) PerlIO_close(fp);
6e21c824 568 goto say_false;
a687059c 569 }
7114a2d2 570#ifndef PERL_MICRO
3280af22 571 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 572 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
573#ifdef HAS_SOCKET
574 else if (
c623bd54 575#ifdef S_IFMT
3280af22 576 !(PL_statbuf.st_mode & S_IFMT)
99b89507 577#else
b28d0864 578 !PL_statbuf.st_mode
99b89507 579#endif
0759c907
JH
580 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
581 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
582 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
583 char tmpbuf[256];
584 Sock_size_t buflen = sizeof tmpbuf;
585 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
586 || errno != ENOTSOCK)
587 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
588 /* but some return 0 for streams too, sigh */
99b89507 589 }
e99cca91 590#endif /* HAS_SOCKET */
7114a2d2 591#endif /* !PERL_MICRO */
a687059c 592 }
e99cca91
NIS
593
594 /* Eeek - FIXME !!!
595 * If this is a standard handle we discard all the layer stuff
596 * and just dup the fd into whatever was on the handle before !
597 */
598
6e21c824 599 if (saveifp) { /* must use old fp? */
f5b9d040 600 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 601 then dup the new fileno down
f5b9d040 602 */
6e21c824 603 if (saveofp) {
f5b9d040 604 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 605 if (saveofp != saveifp) { /* was a socket? */
760ac839 606 PerlIO_close(saveofp);
6e21c824
LW
607 }
608 }
6e60e805 609 if (savefd != fd) {
e934609f 610 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
611 is assigned to (say) STDOUT - for now let dup2() fail
612 and provide the error
613 */
bd4a5668
NIS
614 if (PerlLIO_dup2(fd, savefd) < 0) {
615 (void)PerlIO_close(fp);
616 goto say_false;
617 }
d082dcd6 618#ifdef VMS
6e60e805 619 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
620 char newname[FILENAME_MAX+1];
621 if (PerlIO_getname(fp, newname)) {
622 if (fd == PerlIO_fileno(PerlIO_stdout()))
623 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
624 if (fd == PerlIO_fileno(PerlIO_stderr()))
625 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
626 }
d082dcd6
JH
627 }
628#endif
d0e2cf63
AMS
629
630#if !defined(WIN32)
631 /* PL_fdpid isn't used on Windows, so avoid this useless work.
632 * XXX Probably the same for a lot of other places. */
633 {
634 Pid_t pid;
635 SV *sv;
636
d0e2cf63 637 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 638 SvUPGRADE(sv, SVt_IV);
d0e2cf63 639 pid = SvIVX(sv);
45977657 640 SvIV_set(sv, 0);
d0e2cf63 641 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 642 SvUPGRADE(sv, SVt_IV);
45977657 643 SvIV_set(sv, pid);
d0e2cf63
AMS
644 }
645#endif
646
e212fc47
AMS
647 if (was_fdopen) {
648 /* need to close fp without closing underlying fd */
649 int ofd = PerlIO_fileno(fp);
650 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
651#if defined(HAS_FCNTL) && defined(F_SETFD)
652 /* Assume if we have F_SETFD we have F_GETFD */
653 int coe = fcntl(ofd,F_GETFD);
654#endif
e212fc47
AMS
655 PerlIO_close(fp);
656 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
657#if defined(HAS_FCNTL) && defined(F_SETFD)
658 /* The dup trick has lost close-on-exec on ofd */
659 fcntl(ofd,F_SETFD, coe);
660#endif
e212fc47 661 PerlLIO_close(dupfd);
ecdeb87c 662 }
e212fc47
AMS
663 else
664 PerlIO_close(fp);
6e21c824
LW
665 }
666 fp = saveifp;
760ac839 667 PerlIO_clearerr(fp);
e99cca91 668 fd = PerlIO_fileno(fp);
6e21c824 669 }
a0d0e21e 670#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 671 if (fd >= 0) {
4ee39169 672 dSAVE_ERRNO;
a8710ca1 673 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
4ee39169 674 RESTORE_ERRNO;
a8710ca1 675 }
1462b684 676#endif
8990e307 677 IoIFP(io) = fp;
b931b1d9 678
684bef36 679 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 680 if (writing) {
50952442 681 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 682 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 683 char *s = mode;
3b6c1aba
JH
684 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
685 s++;
a33cf58c 686 *s = 'w';
1feb1812 687 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 688 PerlIO_close(fp);
4608196e 689 IoIFP(io) = NULL;
6e21c824 690 goto say_false;
fe14fcc3 691 }
1462b684
LW
692 }
693 else
8990e307 694 IoOFP(io) = fp;
bf38876a 695 }
a687059c 696 return TRUE;
6e21c824
LW
697
698say_false:
8990e307
LW
699 IoIFP(io) = saveifp;
700 IoOFP(io) = saveofp;
701 IoTYPE(io) = savetype;
6e21c824 702 return FALSE;
a687059c
LW
703}
704
760ac839 705PerlIO *
864dbfa3 706Perl_nextargv(pTHX_ register GV *gv)
a687059c 707{
97aff369 708 dVAR;
79072805 709 register SV *sv;
99b89507 710#ifndef FLEXFILENAMES
c623bd54
LW
711 int filedev;
712 int fileino;
99b89507 713#endif
761237fe
JB
714 Uid_t fileuid;
715 Gid_t filegid;
2d03de9c 716 IO * const io = GvIOp(gv);
fe14fcc3 717
7918f24d
NC
718 PERL_ARGS_ASSERT_NEXTARGV;
719
3280af22 720 if (!PL_argvoutgv)
fafc274c 721 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
18708f5a
GS
722 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
723 IoFLAGS(io) &= ~IOf_START;
7a1c5554 724 if (PL_inplace) {
294b3b39 725 assert(PL_defoutgv);
29a861e7
NC
726 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
727 SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 728 }
18708f5a 729 }
3280af22
NIS
730 if (PL_filemode & (S_ISUID|S_ISGID)) {
731 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 732#ifdef HAS_FCHMOD
c797f2d8
DM
733 if (PL_lastfd != -1)
734 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 735#else
b28d0864 736 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
737#endif
738 }
c797f2d8 739 PL_lastfd = -1;
3280af22 740 PL_filemode = 0;
5c501b37 741 if (!GvAV(gv))
4608196e 742 return NULL;
79072805 743 while (av_len(GvAV(gv)) >= 0) {
85aff577 744 STRLEN oldlen;
79072805 745 sv = av_shift(GvAV(gv));
8990e307 746 SAVEFREESV(sv);
e203899d 747 sv_setsv(GvSVn(gv),sv);
79072805 748 SvSETMAGIC(GvSV(gv));
3280af22 749 PL_oldname = SvPVx(GvSV(gv), oldlen);
4608196e 750 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
3280af22 751 if (PL_inplace) {
79072805 752 TAINT_PROPER("inplace open");
3280af22 753 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC
754 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
755 SVt_PVIO));
a0d0e21e 756 return IoIFP(GvIOp(gv));
c623bd54 757 }
99b89507 758#ifndef FLEXFILENAMES
b28d0864
NIS
759 filedev = PL_statbuf.st_dev;
760 fileino = PL_statbuf.st_ino;
99b89507 761#endif
3280af22
NIS
762 PL_filemode = PL_statbuf.st_mode;
763 fileuid = PL_statbuf.st_uid;
764 filegid = PL_statbuf.st_gid;
765 if (!S_ISREG(PL_filemode)) {
9b387841
NC
766 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
767 "Can't do inplace edit: %s is not a regular file",
768 PL_oldname );
79072805 769 do_close(gv,FALSE);
c623bd54
LW
770 continue;
771 }
c9930541 772 if (*PL_inplace && strNE(PL_inplace, "*")) {
2d03de9c 773 const char *star = strchr(PL_inplace, '*');
2d259d92 774 if (star) {
2d03de9c 775 const char *begin = PL_inplace;
76f68e9b 776 sv_setpvs(sv, "");
2d259d92
CK
777 do {
778 sv_catpvn(sv, begin, star - begin);
3280af22 779 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
780 begin = ++star;
781 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
782 if (*begin)
783 sv_catpv(sv,begin);
2d259d92
CK
784 }
785 else {
3280af22 786 sv_catpv(sv,PL_inplace);
2d259d92 787 }
c623bd54 788#ifndef FLEXFILENAMES
95a20fc0 789 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
790 && PL_statbuf.st_dev == filedev
791 && PL_statbuf.st_ino == fileino)
39e571d4 792#ifdef DJGPP
5f74f29c 793 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 794#endif
f248d071
GS
795 )
796 {
9b387841
NC
797 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
798 "Can't do inplace edit: %"SVf" would not be unique",
799 SVfARG(sv));
79072805 800 do_close(gv,FALSE);
c623bd54
LW
801 continue;
802 }
803#endif
fe14fcc3 804#ifdef HAS_RENAME
2585f9a3 805#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 806 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
9b387841
NC
807 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
808 "Can't rename %s to %"SVf": %s, skipping file",
809 PL_oldname, SVfARG(sv), Strerror(errno));
79072805 810 do_close(gv,FALSE);
c623bd54
LW
811 continue;
812 }
a687059c 813#else
79072805 814 do_close(gv,FALSE);
95a20fc0
SP
815 (void)PerlLIO_unlink(SvPVX_const(sv));
816 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
30fc4309 817 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),TRUE,O_RDONLY,0,NULL);
55497cff 818#endif /* DOSISH */
ff8e2863 819#else
95a20fc0
SP
820 (void)UNLINK(SvPVX_const(sv));
821 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
9b387841
NC
822 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
823 "Can't rename %s to %"SVf": %s, skipping file",
824 PL_oldname, SVfARG(sv), Strerror(errno) );
79072805 825 do_close(gv,FALSE);
c623bd54
LW
826 continue;
827 }
b28d0864 828 (void)UNLINK(PL_oldname);
a687059c
LW
829#endif
830 }
831 else {
c030f24b 832#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 833# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 834 if (UNLINK(PL_oldname) < 0) {
9b387841
NC
835 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
836 "Can't remove %s: %s, skipping file",
837 PL_oldname, Strerror(errno) );
79072805 838 do_close(gv,FALSE);
fe14fcc3
LW
839 continue;
840 }
edc7bc49 841# endif
ff8e2863 842#else
cea2e8a9 843 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 844#endif
a687059c
LW
845 }
846
30fc4309 847 sv_setpvn(sv,PL_oldname,oldlen);
748a9306 848 SETERRNO(0,0); /* in case sprintf set errno */
7f8ee4be
NC
849 if (!Perl_do_openn(aTHX_ PL_argvoutgv, (char*)SvPVX_const(sv),
850 SvCUR(sv), TRUE,
4119ab01 851#ifdef VMS
7f8ee4be 852 O_WRONLY|O_CREAT|O_TRUNC,0,
4119ab01 853#else
7f8ee4be 854 O_WRONLY|O_CREAT|OPEN_EXCL,0600,
4119ab01 855#endif
7f8ee4be 856 NULL, NULL, 0)) {
9b387841
NC
857 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
858 PL_oldname, Strerror(errno) );
79072805 859 do_close(gv,FALSE);
fe14fcc3
LW
860 continue;
861 }
3280af22
NIS
862 setdefout(PL_argvoutgv);
863 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
864 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 865#ifdef HAS_FCHMOD
3280af22 866 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 867#else
b28d0864 868 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
a687059c 869#endif
3280af22 870 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 871#ifdef HAS_FCHOWN
3280af22 872 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 873#else
fe14fcc3 874#ifdef HAS_CHOWN
b28d0864 875 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 876#endif
b1248f16 877#endif
fe14fcc3 878 }
a687059c 879 }
a0d0e21e 880 return IoIFP(GvIOp(gv));
a687059c 881 }
4d61ec05 882 else {
4d61ec05 883 if (ckWARN_d(WARN_INPLACE)) {
4373e329 884 const int eno = errno;
6af84f9f
GS
885 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
886 && !S_ISREG(PL_statbuf.st_mode))
887 {
9014280d 888 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
4d61ec05 889 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 890 PL_oldname);
6af84f9f 891 }
4d61ec05 892 else
9014280d 893 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
6af84f9f 894 PL_oldname, Strerror(eno));
4d61ec05
GS
895 }
896 }
a687059c 897 }
18708f5a
GS
898 if (io && (IoFLAGS(io) & IOf_ARGV))
899 IoFLAGS(io) |= IOf_START;
3280af22
NIS
900 if (PL_inplace) {
901 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
902 if (io && (IoFLAGS(io) & IOf_ARGV)
903 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
904 {
159b6efe 905 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
18708f5a
GS
906 setdefout(oldout);
907 SvREFCNT_dec(oldout);
4608196e 908 return NULL;
18708f5a 909 }
fafc274c 910 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 911 }
4608196e 912 return NULL;
a687059c
LW
913}
914
517844ec 915/* explicit renamed to avoid C++ conflict -- kja */
a687059c 916bool
864dbfa3 917Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 918{
97aff369 919 dVAR;
1193dd27
IZ
920 bool retval;
921 IO *io;
a687059c 922
79072805 923 if (!gv)
3280af22 924 gv = PL_argvgv;
6e592b3a 925 if (!gv || !isGV_with_GP(gv)) {
1d2dff63 926 if (not_implicit)
93189314 927 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 928 return FALSE;
99b89507 929 }
79072805
LW
930 io = GvIO(gv);
931 if (!io) { /* never opened */
1d2dff63 932 if (not_implicit) {
51087808 933 report_evil_fh(gv);
93189314 934 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 935 }
a687059c
LW
936 return FALSE;
937 }
f2b5be74 938 retval = io_close(io, not_implicit);
517844ec 939 if (not_implicit) {
1193dd27
IZ
940 IoLINES(io) = 0;
941 IoPAGE(io) = 0;
942 IoLINES_LEFT(io) = IoPAGE_LEN(io);
943 }
50952442 944 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
945 return retval;
946}
947
948bool
f2b5be74 949Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27 950{
97aff369 951 dVAR;
1193dd27 952 bool retval = FALSE;
1193dd27 953
7918f24d
NC
954 PERL_ARGS_ASSERT_IO_CLOSE;
955
8990e307 956 if (IoIFP(io)) {
50952442 957 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 958 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 959 if (not_implicit) {
37038d91 960 STATUS_NATIVE_CHILD_SET(status);
e5218da5 961 retval = (STATUS_UNIX == 0);
f2b5be74
GS
962 }
963 else {
964 retval = (status != -1);
965 }
a687059c 966 }
50952442 967 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
968 retval = TRUE;
969 else {
8990e307 970 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 971 const bool prev_err = PerlIO_error(IoOFP(io));
e199e3be 972 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 973 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 974 }
e199e3be 975 else {
0bcc34c2 976 const bool prev_err = PerlIO_error(IoIFP(io));
e199e3be
RGS
977 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
978 }
a687059c 979 }
4608196e 980 IoOFP(io) = IoIFP(io) = NULL;
79072805 981 }
f2b5be74 982 else if (not_implicit) {
93189314 983 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 984 }
1193dd27 985
a687059c
LW
986 return retval;
987}
988
989bool
864dbfa3 990Perl_do_eof(pTHX_ GV *gv)
a687059c 991{
97aff369 992 dVAR;
0bcc34c2 993 register IO * const io = GvIO(gv);
a687059c 994
7918f24d
NC
995 PERL_ARGS_ASSERT_DO_EOF;
996
79072805 997 if (!io)
a687059c 998 return TRUE;
7716c5c5 999 else if (IoTYPE(io) == IoTYPE_WRONLY)
a5390457 1000 report_wrongway_fh(gv, '>');
a687059c 1001
8990e307 1002 while (IoIFP(io)) {
760ac839 1003 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1004 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1005 return FALSE; /* this is the most usual case */
1006 }
a687059c 1007
79852593
NC
1008 {
1009 /* getc and ungetc can stomp on errno */
4ee39169 1010 dSAVE_ERRNO;
79852593
NC
1011 const int ch = PerlIO_getc(IoIFP(io));
1012 if (ch != EOF) {
1013 (void)PerlIO_ungetc(IoIFP(io),ch);
4ee39169 1014 RESTORE_ERRNO;
79852593
NC
1015 return FALSE;
1016 }
4ee39169 1017 RESTORE_ERRNO;
a687059c 1018 }
fab3f3a7 1019
760ac839 1020 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1021 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1022 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1023 }
533c011a 1024 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1025 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1026 return TRUE;
1027 }
1028 else
1029 return TRUE; /* normal fp, definitely end of file */
1030 }
1031 return TRUE;
1032}
1033
5ff3f7a4 1034Off_t
864dbfa3 1035Perl_do_tell(pTHX_ GV *gv)
a687059c 1036{
97aff369 1037 dVAR;
9c9f25b8 1038 IO *const io = GvIO(gv);
96e4d5b1 1039 register PerlIO *fp;
a687059c 1040
7918f24d
NC
1041 PERL_ARGS_ASSERT_DO_TELL;
1042
9c9f25b8 1043 if (io && (fp = IoIFP(io))) {
bee1dbe2 1044#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1045 if (PerlIO_eof(fp))
1046 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1047#endif
8903cb82 1048 return PerlIO_tell(fp);
96e4d5b1 1049 }
51087808 1050 report_evil_fh(gv);
93189314 1051 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1052 return (Off_t)-1;
a687059c
LW
1053}
1054
1055bool
864dbfa3 1056Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1057{
97aff369 1058 dVAR;
9c9f25b8 1059 IO *const io = GvIO(gv);
137443ea 1060 register PerlIO *fp;
a687059c 1061
9c9f25b8 1062 if (io && (fp = IoIFP(io))) {
bee1dbe2 1063#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1064 if (PerlIO_eof(fp))
1065 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1066#endif
8903cb82 1067 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1068 }
51087808 1069 report_evil_fh(gv);
93189314 1070 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1071 return FALSE;
1072}
1073
97cc44eb 1074Off_t
864dbfa3 1075Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1076{
97aff369 1077 dVAR;
9c9f25b8 1078 IO *const io = GvIO(gv);
8903cb82
PP
1079 register PerlIO *fp;
1080
7918f24d
NC
1081 PERL_ARGS_ASSERT_DO_SYSSEEK;
1082
9c9f25b8 1083 if (io && (fp = IoIFP(io)))
3028581b 1084 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
51087808 1085 report_evil_fh(gv);
93189314 1086 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1087 return (Off_t)-1;
8903cb82
PP
1088}
1089
6ff81951 1090int
a79b25b7 1091Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
16fe6d59
GS
1092{
1093 int mode = O_BINARY;
a79b25b7 1094 if (s) {
16fe6d59
GS
1095 while (*s) {
1096 if (*s == ':') {
1097 switch (s[1]) {
1098 case 'r':
e963d6d2 1099 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1100 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1101 {
1102 mode = O_BINARY;
1103 s += 4;
1104 len -= 4;
1105 break;
1106 }
1107 /* FALL THROUGH */
1108 case 'c':
e963d6d2 1109 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1110 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1111 {
1112 mode = O_TEXT;
1113 s += 5;
1114 len -= 5;
1115 break;
1116 }
1117 /* FALL THROUGH */
1118 default:
1119 goto fail_discipline;
1120 }
1121 }
1122 else if (isSPACE(*s)) {
1123 ++s;
1124 --len;
1125 }
1126 else {
4373e329 1127 const char *end;
16fe6d59
GS
1128fail_discipline:
1129 end = strchr(s+1, ':');
1130 if (!end)
1131 end = s+len;
60382766 1132#ifndef PERLIO_LAYERS
363c40c4 1133 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1134#else
18a33fb5 1135 len -= end-s;
60382766
NIS
1136 s = end;
1137#endif
16fe6d59
GS
1138 }
1139 }
1140 }
1141 return mode;
1142}
1143
58e24eff 1144#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1145I32
1146my_chsize(int fd, Off_t length)
6eb13c3b 1147{
58e24eff
SH
1148#ifdef F_FREESP
1149 /* code courtesy of William Kucharski */
1150#define HAS_CHSIZE
1151
c623ac67 1152 Stat_t filebuf;
6eb13c3b 1153
3028581b 1154 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1155 return -1;
1156
1157 if (filebuf.st_size < length) {
1158
1159 /* extend file length */
1160
3028581b 1161 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1162 return -1;
1163
1164 /* write a "0" byte */
1165
3028581b 1166 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1167 return -1;
1168 }
1169 else {
1170 /* truncate length */
35da51f7 1171 struct flock fl;
6eb13c3b
LW
1172 fl.l_whence = 0;
1173 fl.l_len = 0;
1174 fl.l_start = length;
a0d0e21e 1175 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1176
1177 /*
a0d0e21e 1178 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1179 * fcntl(2), which truncates the file so that it ends at the
1180 * position indicated by fl.l_start.
1181 *
1182 * Will minor miracles never cease?
1183 */
1184
a0d0e21e 1185 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1186 return -1;
1187
1188 }
6eb13c3b 1189 return 0;
58e24eff 1190#else
27da23d5 1191 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1192#endif /* F_FREESP */
27da23d5 1193 return -1;
58e24eff
SH
1194}
1195#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1196
a687059c 1197bool
864dbfa3 1198Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1199{
97aff369 1200 dVAR;
7918f24d
NC
1201
1202 PERL_ARGS_ASSERT_DO_PRINT;
1203
79072805
LW
1204 /* assuming fp is checked earlier */
1205 if (!sv)
1206 return TRUE;
e9950d3b
NC
1207 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1208 assert(!SvGMAGICAL(sv));
1209 if (SvIsUV(sv))
1210 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1211 else
1212 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1213 return !PerlIO_error(fp);
1214 }
1215 else {
1216 STRLEN len;
676f44e7 1217 /* Do this first to trigger any overloading. */
e9950d3b
NC
1218 const char *tmps = SvPV_const(sv, len);
1219 U8 *tmpbuf = NULL;
1220 bool happy = TRUE;
1221
7d59b7e4 1222 if (PerlIO_isutf8(fp)) {
676f44e7
NC
1223 if (!SvUTF8(sv)) {
1224 /* We don't modify the original scalar. */
1225 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1226 tmps = (char *) tmpbuf;
1227 }
0876b9a0
KW
1228 else if (ckWARN_d(WARN_UTF8)) {
1229 (void) check_utf8_print((const U8*) tmps, len);
1230 }
7d59b7e4 1231 }
ae798467 1232 else if (DO_UTF8(sv)) {
676f44e7
NC
1233 STRLEN tmplen = len;
1234 bool utf8 = TRUE;
35da51f7 1235 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7
NC
1236 if (!utf8) {
1237 tmpbuf = result;
1238 tmps = (char *) tmpbuf;
1239 len = tmplen;
1240 }
1241 else {
1242 assert((char *)result == tmps);
9b387841 1243 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
21630838
FC
1244 "Wide character in %s",
1245 PL_op ? OP_DESC(PL_op) : "print"
1246 );
0876b9a0
KW
1247 /* Could also check that isn't one of the things to avoid
1248 * in utf8 by using check_utf8_print(), but not doing so,
1249 * since the stream isn't a UTF8 stream */
ae798467
NIS
1250 }
1251 }
e9950d3b
NC
1252 /* To detect whether the process is about to overstep its
1253 * filesize limit we would need getrlimit(). We could then
1254 * also transparently raise the limit with setrlimit() --
1255 * but only until the system hard limit/the filesystem limit,
1256 * at which we would get EPERM. Note that when using buffered
1257 * io the write failure can be delayed until the flush/close. --jhi */
1258 if (len && (PerlIO_write(fp,tmps,len) == 0))
1259 happy = FALSE;
1260 Safefree(tmpbuf);
1261 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 1262 }
a687059c
LW
1263}
1264
79072805 1265I32
0d7d409d 1266Perl_my_stat_flags(pTHX_ const U32 flags)
a687059c 1267{
97aff369 1268 dVAR;
39644a26 1269 dSP;
79072805 1270 IO *io;
2dd78f96 1271 GV* gv;
79072805 1272
533c011a 1273 if (PL_op->op_flags & OPf_REF) {
924508f0 1274 EXTEND(SP,1);
2dd78f96 1275 gv = cGVOP_gv;
748a9306 1276 do_fstat:
5228a96c
SP
1277 if (gv == PL_defgv)
1278 return PL_laststatval;
2dd78f96 1279 io = GvIO(gv);
ad02613c 1280 do_fstat_have_io:
5228a96c 1281 PL_laststype = OP_STAT;
bd5f6c01 1282 PL_statgv = gv ? gv : (GV *)io;
76f68e9b 1283 sv_setpvs(PL_statname, "");
5228a96c
SP
1284 if(io) {
1285 if (IoIFP(io)) {
1286 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1287 } else if (IoDIRP(io)) {
3497a01f 1288 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c 1289 }
5228a96c 1290 }
3888144c
FC
1291 PL_laststatval = -1;
1292 report_evil_fh(gv);
1293 return -1;
a687059c
LW
1294 }
1295 else {
8db8f6b6
FC
1296 SV* const sv = PL_op->op_private & OPpFT_STACKING ? TOPs : POPs;
1297 PUTBACK;
1298 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1299 == OPpFT_STACKED)
1300 return PL_laststatval;
1301 else {
4373e329 1302 const char *s;
4ecd490c 1303 STRLEN len;
094a3eec 1304 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
748a9306
LW
1305 goto do_fstat;
1306 }
ad02613c 1307 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
a45c7426 1308 io = MUTABLE_IO(SvRV(sv));
7f39519f 1309 gv = NULL;
ad02613c
SP
1310 goto do_fstat_have_io;
1311 }
748a9306 1312
0d7d409d 1313 s = SvPV_flags_const(sv, len, flags);
a0714e2c 1314 PL_statgv = NULL;
4ecd490c 1315 sv_setpvn(PL_statname, s, len);
95a20fc0 1316 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1317 PL_laststype = OP_STAT;
1318 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1319 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1320 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1321 return PL_laststatval;
8db8f6b6 1322 }
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 }
31b139ba 1342 PL_laststatval = -1;
5d3e98de 1343 if (ckWARN(WARN_IO)) {
d0c0e7dd
FC
1344 Perl_warner(aTHX_ packWARN(WARN_IO),
1345 "Use of -l on filehandle %"HEKf,
1346 HEKfARG(GvENAME_HEK(cGVOP_gv)));
5d3e98de 1347 }
31b139ba 1348 return -1;
fe14fcc3 1349 }
8db8f6b6
FC
1350 sv = PL_op->op_private & OPpFT_STACKING ? TOPs : POPs;
1351 PUTBACK;
1352 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1353 == OPpFT_STACKED) {
1f26655e 1354 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1355 Perl_croak(aTHX_ no_prev_lstat);
1f26655e
FC
1356 return PL_laststatval;
1357 }
c623bd54 1358
3280af22 1359 PL_laststype = OP_LSTAT;
a0714e2c 1360 PL_statgv = NULL;
0d7d409d 1361 file = SvPV_flags_const_nolen(sv, flags);
b16276bb
VP
1362 sv_setpv(PL_statname,file);
1363 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1364 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
9014280d 1365 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1366 return PL_laststatval;
c623bd54
LW
1367}
1368
a0f2c8ec
JD
1369static void
1370S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1371{
1372 const int e = errno;
7918f24d 1373 PERL_ARGS_ASSERT_EXEC_FAILED;
a0f2c8ec
JD
1374 if (ckWARN(WARN_EXEC))
1375 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1376 cmd, Strerror(e));
1377 if (do_report) {
1378 PerlLIO_write(fd, (void*)&e, sizeof(int));
1379 PerlLIO_close(fd);
1380 }
1381}
1382
d5a9bfb0 1383bool
2aa1486d
GS
1384Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1385 int fd, int do_report)
d5a9bfb0 1386{
27da23d5 1387 dVAR;
7918f24d 1388 PERL_ARGS_ASSERT_DO_AEXEC5;
e37778c2 1389#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH
1390 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1391#else
79072805 1392 if (sp > mark) {
360ea906 1393 const char **a;
6136c704 1394 const char *tmps = NULL;
360ea906 1395 Newx(PL_Argv, sp - mark + 1, const char*);
c3c5fad7 1396 a = PL_Argv;
890ce7af 1397
79072805
LW
1398 while (++mark <= sp) {
1399 if (*mark)
360ea906 1400 *a++ = SvPV_nolen_const(*mark);
a687059c
LW
1401 else
1402 *a++ = "";
1403 }
6136c704 1404 *a = NULL;
91b2752f 1405 if (really)
e62f0680 1406 tmps = SvPV_nolen_const(really);
91b2752f
RG
1407 if ((!really && *PL_Argv[0] != '/') ||
1408 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1409 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1410 PERL_FPU_PRE_EXEC
91b2752f 1411 if (really && *tmps)
b4748376 1412 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1413 else
b4748376 1414 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1415 PERL_FPU_POST_EXEC
a0f2c8ec 1416 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
a687059c 1417 }
bee1dbe2 1418 do_execfree();
cd39f2b6 1419#endif
a687059c
LW
1420 return FALSE;
1421}
1422
fe14fcc3 1423void
864dbfa3 1424Perl_do_execfree(pTHX)
ff8e2863 1425{
97aff369 1426 dVAR;
43c5f42d 1427 Safefree(PL_Argv);
4608196e 1428 PL_Argv = NULL;
43c5f42d 1429 Safefree(PL_Cmd);
bd61b366 1430 PL_Cmd = NULL;
ff8e2863
LW
1431}
1432
9555a685 1433#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1434
1435bool
2fbb330f 1436Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1437{
27da23d5 1438 dVAR;
360ea906 1439 register const char **a;
a687059c 1440 register char *s;
15db3ae2 1441 char *buf;
2fbb330f 1442 char *cmd;
2fbb330f 1443 /* Make a copy so we can change it */
6fca0082 1444 const Size_t cmdlen = strlen(incmd) + 1;
7918f24d
NC
1445
1446 PERL_ARGS_ASSERT_DO_EXEC3;
1447
15db3ae2
DM
1448 Newx(buf, cmdlen, char);
1449 cmd = buf;
cfff9797 1450 memcpy(cmd, incmd, cmdlen);
a687059c 1451
748a9306
LW
1452 while (*cmd && isSPACE(*cmd))
1453 cmd++;
1454
a687059c
LW
1455 /* save an extra exec if possible */
1456
bf38876a 1457#ifdef CSH
d05c1ba0 1458 {
0c19750d 1459 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1460 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1461 strnEQ(cmd+PL_cshlen," -c",3)) {
28f0d0ec 1462 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH
1463 s = cmd+PL_cshlen+3;
1464 if (*s == 'f') {
1465 s++;
28f0d0ec 1466 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH
1467 }
1468 if (*s == ' ')
1469 s++;
1470 if (*s++ == '\'') {
0bcc34c2 1471 char * const ncmd = s;
d05c1ba0
JH
1472
1473 while (*s)
1474 s++;
1475 if (s[-1] == '\n')
1476 *--s = '\0';
1477 if (s[-1] == '\'') {
1478 *--s = '\0';
b35112e7 1479 PERL_FPU_PRE_EXEC
7c0dd7ca 1480 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 1481 PERL_FPU_POST_EXEC
d05c1ba0 1482 *s = '\'';
a0f2c8ec 1483 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
15db3ae2 1484 Safefree(buf);
d05c1ba0
JH
1485 return FALSE;
1486 }
1487 }
a687059c
LW
1488 }
1489 }
bf38876a 1490#endif /* CSH */
a687059c
LW
1491
1492 /* see if there are shell metacharacters in it */
1493
748a9306
LW
1494 if (*cmd == '.' && isSPACE(cmd[1]))
1495 goto doshell;
1496
1497 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1498 goto doshell;
1499
294b3b39
AL
1500 s = cmd;
1501 while (isALNUM(*s))
1502 s++; /* catch VAR=val gizmo */
63f2c1e1
LW
1503 if (*s == '=')
1504 goto doshell;
748a9306 1505
a687059c 1506 for (s = cmd; *s; s++) {
d05c1ba0
JH
1507 if (*s != ' ' && !isALPHA(*s) &&
1508 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1509 if (*s == '\n' && !s[1]) {
1510 *s = '\0';
1511 break;
1512 }
603a98b0
IZ
1513 /* handle the 2>&1 construct at the end */
1514 if (*s == '>' && s[1] == '&' && s[2] == '1'
1515 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1516 && (!s[3] || isSPACE(s[3])))
1517 {
6867be6d 1518 const char *t = s + 3;
603a98b0
IZ
1519
1520 while (*t && isSPACE(*t))
1521 ++t;
943bbd07 1522 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1523 s[-2] = '\0';
1524 break;
1525 }
1526 }
a687059c 1527 doshell:
b35112e7 1528 PERL_FPU_PRE_EXEC
7c0dd7ca 1529 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 1530 PERL_FPU_POST_EXEC
a0f2c8ec 1531 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
15db3ae2 1532 Safefree(buf);
a687059c
LW
1533 return FALSE;
1534 }
1535 }
748a9306 1536
360ea906 1537 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
3280af22
NIS
1538 PL_Cmd = savepvn(cmd, s-cmd);
1539 a = PL_Argv;
1540 for (s = PL_Cmd; *s;) {
294b3b39
AL
1541 while (isSPACE(*s))
1542 s++;
a687059c
LW
1543 if (*s)
1544 *(a++) = s;
294b3b39
AL
1545 while (*s && !isSPACE(*s))
1546 s++;
a687059c
LW
1547 if (*s)
1548 *s++ = '\0';
1549 }
6136c704 1550 *a = NULL;
3280af22 1551 if (PL_Argv[0]) {
b35112e7 1552 PERL_FPU_PRE_EXEC
360ea906 1553 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1554 PERL_FPU_POST_EXEC
b1248f16 1555 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1556 do_execfree();
a687059c 1557 goto doshell;
b1248f16 1558 }
a0f2c8ec 1559 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
a687059c 1560 }
ff8e2863 1561 do_execfree();
15db3ae2 1562 Safefree(buf);
a687059c
LW
1563 return FALSE;
1564}
1565
6890e559 1566#endif /* OS2 || WIN32 */
760ac839 1567
79072805 1568I32
864dbfa3 1569Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1570{
97aff369 1571 dVAR;
79072805 1572 register I32 val;
79072805 1573 register I32 tot = 0;
4634a855 1574 const char *const what = PL_op_name[type];
5c144d81 1575 const char *s;
84c7b88c 1576 STRLEN len;
890ce7af 1577 SV ** const oldmark = mark;
a687059c 1578
7918f24d
NC
1579 PERL_ARGS_ASSERT_APPLY;
1580
1444765e
NC
1581 /* Doing this ahead of the switch statement preserves the old behaviour,
1582 where attempting to use kill as a taint test test would fail on
1583 platforms where kill was not defined. */
1584#ifndef HAS_KILL
1585 if (type == OP_KILL)
4634a855 1586 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1587#endif
1588#ifndef HAS_CHOWN
1589 if (type == OP_CHOWN)
4634a855 1590 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1591#endif
1592
1593
20408e3c 1594#define APPLY_TAINT_PROPER() \
3280af22 1595 STMT_START { \
17406bd6 1596 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1597 } STMT_END
20408e3c
GS
1598
1599 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1600 if (PL_tainting) {
463ee0b2 1601 while (++mark <= sp) {
bbce6d69
PP
1602 if (SvTAINTED(*mark)) {
1603 TAINT;
1604 break;
1605 }
463ee0b2
LW
1606 }
1607 mark = oldmark;
1608 }
a687059c 1609 switch (type) {
79072805 1610 case OP_CHMOD:
20408e3c 1611 APPLY_TAINT_PROPER();
79072805 1612 if (++mark <= sp) {
4ea561bc 1613 val = SvIV(*mark);
20408e3c
GS
1614 APPLY_TAINT_PROPER();
1615 tot = sp - mark;
79072805 1616 while (++mark <= sp) {
c4aca7d0 1617 GV* gv;
2ea1cce7 1618 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA
1619 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1620#ifdef HAS_FCHMOD
1621 APPLY_TAINT_PROPER();
1622 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1623 tot--;
1624#else
b9c6780e 1625 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1626#endif
1627 }
1628 else {
1629 tot--;
1630 }
1631 }
c4aca7d0 1632 else {
93564729 1633 const char *name = SvPV_nomg_const_nolen(*mark);
c4aca7d0
GA
1634 APPLY_TAINT_PROPER();
1635 if (PerlLIO_chmod(name, val))
1636 tot--;
1637 }
a687059c
LW
1638 }
1639 }
1640 break;
fe14fcc3 1641#ifdef HAS_CHOWN
79072805 1642 case OP_CHOWN:
20408e3c 1643 APPLY_TAINT_PROPER();
79072805 1644 if (sp - mark > 2) {
6867be6d 1645 register I32 val2;
463ee0b2
LW
1646 val = SvIVx(*++mark);
1647 val2 = SvIVx(*++mark);
20408e3c 1648 APPLY_TAINT_PROPER();
a0d0e21e 1649 tot = sp - mark;
79072805 1650 while (++mark <= sp) {
c4aca7d0 1651 GV* gv;
2ea1cce7 1652 if ((gv = MAYBE_DEREF_GV(*mark))) {
c4aca7d0
GA
1653 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1654#ifdef HAS_FCHOWN
1655 APPLY_TAINT_PROPER();
1656 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1657 tot--;
1658#else
b9c6780e 1659 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1660#endif
1661 }
1662 else {
1663 tot--;
1664 }
1665 }
c4aca7d0 1666 else {
93564729 1667 const char *name = SvPV_nomg_const_nolen(*mark);
c4aca7d0
GA
1668 APPLY_TAINT_PROPER();
1669 if (PerlLIO_chown(name, val, val2))
1670 tot--;
1671 }
a687059c
LW
1672 }
1673 }
1674 break;
b1248f16 1675#endif
a1d180c4 1676/*
dd64f1c3
AD
1677XXX Should we make lchown() directly available from perl?
1678For now, we'll let Configure test for HAS_LCHOWN, but do
1679nothing in the core.
1680 --AD 5/1998
1681*/
fe14fcc3 1682#ifdef HAS_KILL
79072805 1683 case OP_KILL:
20408e3c 1684 APPLY_TAINT_PROPER();
55497cff
PP
1685 if (mark == sp)
1686 break;
84c7b88c 1687 s = SvPVx_const(*++mark, len);
e02bfb16 1688 if (isALPHA(*s)) {
84c7b88c 1689 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
79072805 1690 s += 3;
84c7b88c
BF
1691 len -= 3;
1692 }
1693 if ((val = whichsig_pvn(s, len)) < 0)
1694 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
79072805
LW
1695 }
1696 else
4ea561bc 1697 val = SvIV(*mark);
20408e3c
GS
1698 APPLY_TAINT_PROPER();
1699 tot = sp - mark;
3595fcef
PP
1700#ifdef VMS
1701 /* kill() doesn't do process groups (job trees?) under VMS */
1702 if (val < 0) val = -val;
1703 if (val == SIGKILL) {
1704# include <starlet.h>
1705 /* Use native sys$delprc() to insure that target process is
1706 * deleted; supervisor-mode images don't pay attention to
1707 * CRTL's emulation of Unix-style signals and kill()
1708 */
1709 while (++mark <= sp) {
5f521955
JH
1710 I32 proc;
1711 register unsigned long int __vmssts;
8af710eb 1712 SvGETMAGIC(*mark);
e2c0f81f
DG
1713 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1714 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1715 proc = SvIV_nomg(*mark);
20408e3c 1716 APPLY_TAINT_PROPER();
3595fcef
PP
1717 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1718 tot--;
1719 switch (__vmssts) {
1720 case SS$_NONEXPR:
1721 case SS$_NOSUCHNODE:
1722 SETERRNO(ESRCH,__vmssts);
1723 break;
1724 case SS$_NOPRIV:
1725 SETERRNO(EPERM,__vmssts);
1726 break;
1727 default:
1728 SETERRNO(EVMSERR,__vmssts);
1729 }
1730 }
1731 }
8165faea 1732 PERL_ASYNC_CHECK();
3595fcef
PP
1733 break;
1734 }
1735#endif
79072805
LW
1736 if (val < 0) {
1737 val = -val;
1738 while (++mark <= sp) {
5f521955 1739 I32 proc;
8af710eb 1740 SvGETMAGIC(*mark);
e2c0f81f
DG
1741 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1742 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1743 proc = SvIV_nomg(*mark);
20408e3c 1744 APPLY_TAINT_PROPER();
fe14fcc3 1745#ifdef HAS_KILLPG
3028581b 1746 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1747#else
3028581b 1748 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1749#endif
79072805 1750 tot--;
a687059c 1751 }
79072805
LW
1752 }
1753 else {
1754 while (++mark <= sp) {
5f521955 1755 I32 proc;
8af710eb 1756 SvGETMAGIC(*mark);
e2c0f81f
DG
1757 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1758 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
8af710eb 1759 proc = SvIV_nomg(*mark);
20408e3c
GS
1760 APPLY_TAINT_PROPER();
1761 if (PerlProc_kill(proc, val))
79072805 1762 tot--;
a687059c
LW
1763 }
1764 }
8165faea 1765 PERL_ASYNC_CHECK();
a687059c 1766 break;
b1248f16 1767#endif
79072805 1768 case OP_UNLINK:
20408e3c 1769 APPLY_TAINT_PROPER();
79072805
LW
1770 tot = sp - mark;
1771 while (++mark <= sp) {
e62f0680 1772 s = SvPV_nolen_const(*mark);
20408e3c 1773 APPLY_TAINT_PROPER();
985213f2 1774 if (PerlProc_geteuid() || PL_unsafe) {
b8ffc8df 1775 if (UNLINK(s))
a687059c
LW
1776 tot--;
1777 }
1778 else { /* don't let root wipe out directories without -U */
3280af22 1779 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1780 tot--;
1781 else {
b8ffc8df 1782 if (UNLINK(s))
a687059c
LW
1783 tot--;
1784 }
1785 }
1786 }
1787 break;
e96b369d 1788#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1789 case OP_UTIME:
20408e3c 1790 APPLY_TAINT_PROPER();
79072805 1791 if (sp - mark > 2) {
e96b369d
GA
1792#if defined(HAS_FUTIMES)
1793 struct timeval utbuf[2];
1794 void *utbufp = utbuf;
1795#elif defined(I_UTIME) || defined(VMS)
663a0e37 1796 struct utimbuf utbuf;
07409e01 1797 struct utimbuf *utbufp = &utbuf;
663a0e37 1798#else
a687059c 1799 struct {
dd2821f6
GS
1800 Time_t actime;
1801 Time_t modtime;
a687059c 1802 } utbuf;
07409e01 1803 void *utbufp = &utbuf;
663a0e37 1804#endif
a687059c 1805
0bcc34c2
AL
1806 SV* const accessed = *++mark;
1807 SV* const modified = *++mark;
c6f7b413 1808
6ec06612
SB
1809 /* Be like C, and if both times are undefined, let the C
1810 * library figure out what to do. This usually means
1811 * "current time". */
c6f7b413
RS
1812
1813 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1814 utbufp = NULL;
1815 else {
1816 Zero(&utbuf, sizeof utbuf, char);
e96b369d 1817#ifdef HAS_FUTIMES
4ea561bc 1818 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 1819 utbuf[0].tv_usec = 0;
4ea561bc 1820 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA
1821 utbuf[1].tv_usec = 0;
1822#elif defined(BIG_TIME)
4ea561bc
NC
1823 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1824 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 1825#else
4ea561bc
NC
1826 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1827 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 1828#endif
6ec06612 1829 }
4373e329 1830 APPLY_TAINT_PROPER();
79072805
LW
1831 tot = sp - mark;
1832 while (++mark <= sp) {
e96b369d 1833 GV* gv;
64617da9 1834 if ((gv = MAYBE_DEREF_GV(*mark))) {
e96b369d
GA
1835 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1836#ifdef HAS_FUTIMES
1837 APPLY_TAINT_PROPER();
8b7231d9
SP
1838 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1839 (struct timeval *) utbufp))
e96b369d
GA
1840 tot--;
1841#else
1842 Perl_die(aTHX_ PL_no_func, "futimes");
1843#endif
1844 }
1845 else {
1846 tot--;
1847 }
1848 }
e96b369d 1849 else {
64617da9 1850 const char * const name = SvPV_nomg_const_nolen(*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
985213f2 1912 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 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 }
985213f2 1922 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
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;
985213f2 1941 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
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, "");
0f18891d 2287 SvUPGRADE(mstr, SVt_PV);
af8ff727 2288 SvPOK_only(mstr);
bb7a0f54 2289 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2290
bee1dbe2 2291 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2292 SvCUR_set(mstr, msize);
2293 *SvEND(mstr) = '\0';
a0d0e21e 2294 SvSETMAGIC(mstr);
d929ce6f
JH
2295#ifndef INCOMPLETE_TAINTS
2296 /* who knows who has been playing with this shared memory? */
2297 SvTAINTED_on(mstr);
2298#endif
c2ab57d4
LW
2299 }
2300 else {
93524f2b 2301 STRLEN len;
c2ab57d4 2302
93524f2b 2303 const char *mbuf = SvPV_const(mstr, len);
027aa12d 2304 const I32 n = ((I32)len > msize) ? msize : (I32)len;
bee1dbe2 2305 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2306 if (n < msize)
bee1dbe2 2307 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2308 }
2309 return shmdt(shm);
e5d73d77 2310#else
fe13d51d 2311 /* diag_listed_as: shm%s not implemented */
cea2e8a9 2312 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2313#endif
c2ab57d4
LW
2314}
2315
fe14fcc3 2316#endif /* SYSV IPC */
4e35701f 2317
0d44d22b 2318/*
ccfc67b7
JH
2319=head1 IO Functions
2320
0d44d22b
NC
2321=for apidoc start_glob
2322
2323Function called by C<do_readline> to spawn a glob (or do the glob inside
2324perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2325this glob starter is only used by miniperl during the build process.
0d44d22b 2326Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2327
0d44d22b
NC
2328=cut
2329*/
2330
2331PerlIO *
2332Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2333{
27da23d5 2334 dVAR;
561b68a9 2335 SV * const tmpcmd = newSV(0);
0d44d22b 2336 PerlIO *fp;
7918f24d
NC
2337
2338 PERL_ARGS_ASSERT_START_GLOB;
2339
0d44d22b
NC
2340 ENTER;
2341 SAVEFREESV(tmpcmd);
2342#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2343 /* since spawning off a process is a real performance hit */
dca5a913
JM
2344
2345PerlIO *
2346Perl_vms_start_glob
2347 (pTHX_ SV *tmpglob,
2348 IO *io);
2349
49a7a762 2350 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2351
0d44d22b 2352#else /* !VMS */
0d44d22b
NC
2353#ifdef DOSISH
2354#ifdef OS2
2355 sv_setpv(tmpcmd, "for a in ");
2356 sv_catsv(tmpcmd, tmpglob);
2357 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2358#else
2359#ifdef DJGPP
2360 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2361 sv_catsv(tmpcmd, tmpglob);
2362#else
2363 sv_setpv(tmpcmd, "perlglob ");
2364 sv_catsv(tmpcmd, tmpglob);
2365 sv_catpv(tmpcmd, " |");
2366#endif /* !DJGPP */
2367#endif /* !OS2 */
2368#else /* !DOSISH */
2369#if defined(CSH)
2370 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2371 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2372 sv_catsv(tmpcmd, tmpglob);
2373 sv_catpv(tmpcmd, "' 2>/dev/null |");
2374#else
2375 sv_setpv(tmpcmd, "echo ");
2376 sv_catsv(tmpcmd, tmpglob);
2377#if 'z' - 'a' == 25
2378 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2379#else
2380 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2381#endif
2382#endif /* !CSH */
2383#endif /* !DOSISH */
93b2dae1
FC
2384 {
2385 GV * const envgv = gv_fetchpvs("ENV", 0, SVt_PVHV);
2386 SV ** const home = hv_fetchs(GvHV(envgv), "HOME", 0);
2387 if (home && *home) SvGETMAGIC(*home);
2388 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
2389 if (home && *home) SvSETMAGIC(*home);
2390 }
93524f2b 2391 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
4608196e 2392 FALSE, O_RDONLY, 0, NULL);
0d44d22b
NC
2393 fp = IoIFP(io);
2394#endif /* !VMS */
2395 LEAVE;
2396 return fp;
2397}
66610fdd
RGS
2398
2399/*
2400 * Local variables:
2401 * c-indentation-style: bsd
2402 * c-basic-offset: 4
2403 * indent-tabs-mode: t
2404 * End:
2405 *
37442d52
RGS
2406 * ex: set ts=8 sts=4 sw=4 noet:
2407 */