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Remove some strlen()s and replace one strlcpy() with memcpy() because
[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
a687059c 5 *
6e21c824
LW
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
a687059c 8 *
a0d0e21e
LW
9 */
10
11/*
12 * "Far below them they saw the white waters pour into a foaming bowl, and
13 * then swirl darkly about a deep oval basin in the rocks, until they found
14 * their way out again through a narrow gate, and flowed away, fuming and
15 * chattering, into calmer and more level reaches."
a687059c
LW
16 */
17
166f8a29
DM
18/* This file contains functions that do the actual I/O on behalf of ops.
19 * For example, pp_print() calls the do_print() function in this file for
20 * each argument needing printing.
21 */
22
a687059c 23#include "EXTERN.h"
864dbfa3 24#define PERL_IN_DOIO_C
a687059c
LW
25#include "perl.h"
26
fe14fcc3 27#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 28#ifndef HAS_SEM
c2ab57d4 29#include <sys/ipc.h>
aec308ec 30#endif
fe14fcc3 31#ifdef HAS_MSG
c2ab57d4 32#include <sys/msg.h>
e5d73d77 33#endif
fe14fcc3 34#ifdef HAS_SHM
c2ab57d4 35#include <sys/shm.h>
a0d0e21e 36# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 37 extern Shmat_t shmat (int, char *, int);
a0d0e21e 38# endif
c2ab57d4 39#endif
e5d73d77 40#endif
c2ab57d4 41
663a0e37 42#ifdef I_UTIME
3730b96e 43# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
PP
44# include <sys/utime.h>
45# else
46# include <utime.h>
47# endif
663a0e37 48#endif
85aff577 49
85aff577
CS
50#ifdef O_EXCL
51# define OPEN_EXCL O_EXCL
52#else
53# define OPEN_EXCL 0
54#endif
a687059c 55
0c19750d
SP
56#define PERL_MODE_MAX 8
57#define PERL_FLAGS_MAX 10
58
76121258 59#include <signal.h>
76121258 60
a687059c 61bool
2fbb330f 62Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw,
a567e93b
NIS
63 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
64 I32 num_svs)
65{
27da23d5 66 dVAR;
890ce7af 67 register IO * const io = GvIOn(gv);
4608196e
RGS
68 PerlIO *saveifp = NULL;
69 PerlIO *saveofp = NULL;
ee518936 70 int savefd = -1;
9f37169a 71 char savetype = IoTYPE_CLOSED;
c07a80fd 72 int writing = 0;
760ac839 73 PerlIO *fp;
c07a80fd
PP
74 int fd;
75 int result;
3500f679 76 bool was_fdopen = FALSE;
16fe6d59 77 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
b931b1d9 78 char *type = NULL;
e9ed3d63 79 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
ee518936 80 SV *namesv;
a687059c 81
b931b1d9 82 Zero(mode,sizeof(mode),char);
3280af22 83 PL_forkprocess = 1; /* assume true if no fork */
c07a80fd 84
b931b1d9 85 /* Collect default raw/crlf info from the op */
16fe6d59 86 if (PL_op && PL_op->op_type == OP_OPEN) {
c2be40b1 87 /* set up IO layers */
b464bac0 88 const U8 flags = PL_op->op_private;
16fe6d59
GS
89 in_raw = (flags & OPpOPEN_IN_RAW);
90 in_crlf = (flags & OPpOPEN_IN_CRLF);
91 out_raw = (flags & OPpOPEN_OUT_RAW);
92 out_crlf = (flags & OPpOPEN_OUT_CRLF);
93 }
94
b931b1d9 95 /* If currently open - close before we re-open */
a0d0e21e 96 if (IoIFP(io)) {
760ac839 97 fd = PerlIO_fileno(IoIFP(io));
ee518936
NIS
98 if (IoTYPE(io) == IoTYPE_STD) {
99 /* This is a clone of one of STD* handles */
c2ab57d4 100 result = 0;
ee518936
NIS
101 }
102 else if (fd >= 0 && fd <= PL_maxsysfd) {
103 /* This is one of the original STD* handles */
104 saveifp = IoIFP(io);
105 saveofp = IoOFP(io);
8990e307 106 savetype = IoTYPE(io);
ee518936
NIS
107 savefd = fd;
108 result = 0;
6e21c824 109 }
50952442 110 else if (IoTYPE(io) == IoTYPE_PIPE)
3028581b 111 result = PerlProc_pclose(IoIFP(io));
8990e307
LW
112 else if (IoIFP(io) != IoOFP(io)) {
113 if (IoOFP(io)) {
760ac839 114 result = PerlIO_close(IoOFP(io));
6170680b 115 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
116 }
117 else
760ac839 118 result = PerlIO_close(IoIFP(io));
a687059c 119 }
a687059c 120 else
760ac839 121 result = PerlIO_close(IoIFP(io));
ee518936
NIS
122 if (result == EOF && fd > PL_maxsysfd) {
123 /* Why is this not Perl_warn*() call ? */
bf49b057 124 PerlIO_printf(Perl_error_log,
6170680b
IZ
125 "Warning: unable to close filehandle %s properly.\n",
126 GvENAME(gv));
ee518936 127 }
4608196e 128 IoOFP(io) = IoIFP(io) = NULL;
a687059c 129 }
c07a80fd
PP
130
131 if (as_raw) {
b931b1d9 132 /* sysopen style args, i.e. integer mode and permissions */
ee518936 133 STRLEN ix = 0;
e1ec3a88 134 const int appendtrunc =
3dccc55c 135 0
d1da7611 136#ifdef O_APPEND /* Not fully portable. */
3dccc55c 137 |O_APPEND
d1da7611
JH
138#endif
139#ifdef O_TRUNC /* Not fully portable. */
3dccc55c 140 |O_TRUNC
d1da7611 141#endif
3dccc55c 142 ;
6867be6d 143 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
3dccc55c
JH
144 int ismodifying;
145
146 if (num_svs != 0) {
147 Perl_croak(aTHX_ "panic: sysopen with multiple args");
148 }
149 /* It's not always
150
151 O_RDONLY 0
152 O_WRONLY 1
153 O_RDWR 2
154
155 It might be (in OS/390 and Mac OS Classic it is)
156
157 O_WRONLY 1
158 O_RDONLY 2
159 O_RDWR 3
160
161 This means that simple & with O_RDWR would look
162 like O_RDONLY is present. Therefore we have to
163 be more careful.
164 */
165 if ((ismodifying = (rawmode & modifyingmode))) {
166 if ((ismodifying & O_WRONLY) == O_WRONLY ||
167 (ismodifying & O_RDWR) == O_RDWR ||
168 (ismodifying & (O_CREAT|appendtrunc)))
169 TAINT_PROPER("sysopen");
170 }
3b6c1aba 171 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
b931b1d9 172
09458382 173#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
b94c04ac 174 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
5ff3f7a4
GS
175#endif
176
06c7082d 177 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
ee518936 178
42d9b98d 179 namesv = sv_2mortal(newSVpv(oname,0));
ee518936
NIS
180 num_svs = 1;
181 svp = &namesv;
bd61b366 182 type = NULL;
b94c04ac 183 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
a687059c 184 }
c07a80fd 185 else {
b931b1d9 186 /* Regular (non-sys) open */
2fbb330f 187 char *name;
faecd977 188 STRLEN olen = len;
b931b1d9
NIS
189 char *tend;
190 int dodup = 0;
c07a80fd 191
2fbb330f 192 type = savepvn(oname, len);
b931b1d9 193 tend = type+len;
faecd977 194 SAVEFREEPV(type);
eb649f83
AMS
195
196 /* Lose leading and trailing white space */
294b3b39
AL
197 while (isSPACE(*type))
198 type++;
eb649f83
AMS
199 while (tend > type && isSPACE(tend[-1]))
200 *--tend = '\0';
201
6170680b 202 if (num_svs) {
c2be40b1 203 /* New style explicit name, type is just mode and layer info */
9a869a14 204#ifdef USE_STDIO
2fbb330f 205 if (SvROK(*svp) && !strchr(oname,'&')) {
9a869a14
RGS
206 if (ckWARN(WARN_IO))
207 Perl_warner(aTHX_ packWARN(WARN_IO),
208 "Can't open a reference");
93189314 209 SETERRNO(EINVAL, LIB_INVARG);
9a869a14
RGS
210 goto say_false;
211 }
212#endif /* USE_STDIO */
705bfa5f 213 name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
faecd977 214 SAVEFREEPV(name);
6170680b 215 }
faecd977 216 else {
faecd977 217 name = type;
b931b1d9 218 len = tend-type;
faecd977 219 }
6170680b 220 IoTYPE(io) = *type;
516a5887 221 if ((*type == IoTYPE_RDWR) && /* scary */
01a8ea99 222 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
516a5887 223 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
c2be40b1 224 TAINT_PROPER("open");
6170680b 225 mode[1] = *type++;
c07a80fd 226 writing = 1;
a687059c 227 }
c07a80fd 228
9f37169a 229 if (*type == IoTYPE_PIPE) {
b931b1d9
NIS
230 if (num_svs) {
231 if (type[1] != IoTYPE_STD) {
c2be40b1 232 unknown_open_mode:
b931b1d9
NIS
233 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
234 }
235 type++;
6170680b 236 }
294b3b39
AL
237 do {
238 type++;
239 } while (isSPACE(*type));
faecd977 240 if (!num_svs) {
6170680b 241 name = type;
b931b1d9 242 len = tend-type;
faecd977 243 }
4a7d1889
NIS
244 if (*name == '\0') {
245 /* command is missing 19990114 */
06eaf0bc 246 if (ckWARN(WARN_PIPE))
9014280d 247 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
248 errno = EPIPE;
249 goto say_false;
250 }
f27977c3 251 if (!(*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP
252 TAINT_ENV();
253 TAINT_PROPER("piped open");
b931b1d9 254 if (!num_svs && name[len-1] == '|') {
faecd977 255 name[--len] = '\0' ;
599cee73 256 if (ckWARN(WARN_PIPE))
9014280d 257 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 258 }
a1d180c4 259 mode[0] = 'w';
c07a80fd 260 writing = 1;
0c19750d 261 if (out_raw)
28f0d0ec 262 my_strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 263 else if (out_crlf)
28f0d0ec 264 my_strlcat(mode, "t", PERL_MODE_MAX - 1);
4a7d1889
NIS
265 if (num_svs > 1) {
266 fp = PerlProc_popen_list(mode, num_svs, svp);
267 }
268 else {
269 fp = PerlProc_popen(name,mode);
270 }
1771866f
NIS
271 if (num_svs) {
272 if (*type) {
273 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
274 goto say_false;
275 }
276 }
277 }
c2be40b1 278 } /* IoTYPE_PIPE */
9f37169a 279 else if (*type == IoTYPE_WRONLY) {
c07a80fd 280 TAINT_PROPER("open");
6170680b 281 type++;
9f37169a
JH
282 if (*type == IoTYPE_WRONLY) {
283 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 284 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 285 type++;
a0d0e21e 286 }
ee518936 287 else {
c07a80fd 288 mode[0] = 'w';
ee518936 289 }
c07a80fd
PP
290 writing = 1;
291
0c19750d 292 if (out_raw)
28f0d0ec 293 my_strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 294 else if (out_crlf)
28f0d0ec 295 my_strlcat(mode, "t", PERL_MODE_MAX - 1);
6170680b 296 if (*type == '&') {
c07a80fd 297 duplicity:
ecdeb87c 298 dodup = PERLIO_DUP_FD;
e620cd72
NIS
299 type++;
300 if (*type == '=') {
c07a80fd 301 dodup = 0;
e620cd72 302 type++;
4a7d1889 303 }
ee518936 304 if (!num_svs && !*type && supplied_fp) {
4a7d1889 305 /* "<+&" etc. is used by typemaps */
c07a80fd 306 fp = supplied_fp;
ee518936 307 }
a0d0e21e 308 else {
35da51f7 309 PerlIO *that_fp = NULL;
e620cd72
NIS
310 if (num_svs > 1) {
311 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
312 }
294b3b39
AL
313 while (isSPACE(*type))
314 type++;
1771866f 315 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 316 fd = SvUV(*svp);
24a7a40d 317 num_svs = 0;
ee518936 318 }
e620cd72 319 else if (isDIGIT(*type)) {
e620cd72
NIS
320 fd = atoi(type);
321 }
c07a80fd 322 else {
e1ec3a88 323 const IO* thatio;
e620cd72
NIS
324 if (num_svs) {
325 thatio = sv_2io(*svp);
326 }
327 else {
35da51f7 328 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 329 0, SVt_PVIO);
e620cd72
NIS
330 thatio = GvIO(thatgv);
331 }
c07a80fd 332 if (!thatio) {
6e21c824 333#ifdef EINVAL
93189314 334 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 335#endif
c07a80fd
PP
336 goto say_false;
337 }
f4e789af 338 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
339 /* Flush stdio buffer before dup. --mjd
340 * Unfortunately SEEK_CURing 0 seems to
341 * be optimized away on most platforms;
342 * only Solaris and Linux seem to flush
343 * on that. --jhi */
2c534a3f
NC
344#ifdef USE_SFIO
345 /* sfio fails to clear error on next
346 sfwrite, contrary to documentation.
04d26ece 347 -- Nicholas Clark */
ecdeb87c
NIS
348 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
349 PerlIO_clearerr(that_fp);
2c534a3f 350#endif
7211d486
JH
351 /* On the other hand, do all platforms
352 * take gracefully to flushing a read-only
353 * filehandle? Perhaps we should do
354 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
355 PerlIO_flush(that_fp);
356 fd = PerlIO_fileno(that_fp);
0759c907
JH
357 /* When dup()ing STDIN, STDOUT or STDERR
358 * explicitly set appropriate access mode */
f4e789af
NC
359 if (that_fp == PerlIO_stdout()
360 || that_fp == PerlIO_stderr())
0759c907 361 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 362 else if (that_fp == PerlIO_stdin())
0759c907
JH
363 IoTYPE(io) = IoTYPE_RDONLY;
364 /* When dup()ing a socket, say result is
365 * one as well */
366 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 367 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
368 }
369 else
370 fd = -1;
a0d0e21e 371 }
ee518936 372 if (!num_svs)
bd61b366 373 type = NULL;
ecdeb87c
NIS
374 if (that_fp) {
375 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
376 }
377 else {
c07a80fd 378 if (dodup)
ecdeb87c
NIS
379 fd = PerlLIO_dup(fd);
380 else
381 was_fdopen = TRUE;
382 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 383 if (dodup && fd >= 0)
ecdeb87c
NIS
384 PerlLIO_close(fd);
385 }
faecd977 386 }
c07a80fd 387 }
ee518936 388 } /* & */
c07a80fd 389 else {
294b3b39
AL
390 while (isSPACE(*type))
391 type++;
b931b1d9 392 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 393 type++;
760ac839 394 fp = PerlIO_stdout();
50952442 395 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
396 if (num_svs > 1) {
397 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
398 }
c07a80fd
PP
399 }
400 else {
ee518936 401 if (!num_svs) {
2b2a7552 402 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
403 num_svs = 1;
404 svp = &namesv;
bd61b366 405 type = NULL;
ee518936 406 }
6e60e805 407 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 408 }
ee518936 409 } /* !& */
7e72d509
JH
410 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
411 goto unknown_open_mode;
c2be40b1 412 } /* IoTYPE_WRONLY */
9f37169a 413 else if (*type == IoTYPE_RDONLY) {
294b3b39
AL
414 do {
415 type++;
416 } while (isSPACE(*type));
bf38876a 417 mode[0] = 'r';
0c19750d 418 if (in_raw)
28f0d0ec 419 my_strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 420 else if (in_crlf)
28f0d0ec 421 my_strlcat(mode, "t", PERL_MODE_MAX - 1);
6170680b 422 if (*type == '&') {
bf38876a 423 goto duplicity;
6170680b 424 }
b931b1d9 425 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 426 type++;
760ac839 427 fp = PerlIO_stdin();
50952442 428 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
429 if (num_svs > 1) {
430 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
431 }
a687059c 432 }
ee518936
NIS
433 else {
434 if (!num_svs) {
2b2a7552 435 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
436 num_svs = 1;
437 svp = &namesv;
bd61b366 438 type = NULL;
ee518936 439 }
6e60e805 440 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 441 }
7e72d509
JH
442 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
443 goto unknown_open_mode;
c2be40b1
JH
444 } /* IoTYPE_RDONLY */
445 else if ((num_svs && /* '-|...' or '...|' */
446 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 447 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 448 if (num_svs) {
b931b1d9 449 type += 2; /* skip over '-|' */
6170680b
IZ
450 }
451 else {
b931b1d9
NIS
452 *--tend = '\0';
453 while (tend > type && isSPACE(tend[-1]))
454 *--tend = '\0';
a6e20a40
AL
455 for (; isSPACE(*type); type++)
456 ;
6170680b 457 name = type;
b931b1d9 458 len = tend-type;
6170680b 459 }
4a7d1889
NIS
460 if (*name == '\0') {
461 /* command is missing 19990114 */
06eaf0bc 462 if (ckWARN(WARN_PIPE))
9014280d 463 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
464 errno = EPIPE;
465 goto say_false;
466 }
770526c1 467 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
468 TAINT_ENV();
469 TAINT_PROPER("piped open");
a1d180c4 470 mode[0] = 'r';
0c19750d 471
0c19750d 472 if (in_raw)
28f0d0ec 473 my_strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 474 else if (in_crlf)
28f0d0ec 475 my_strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 476
4a7d1889
NIS
477 if (num_svs > 1) {
478 fp = PerlProc_popen_list(mode,num_svs,svp);
479 }
e620cd72 480 else {
4a7d1889
NIS
481 fp = PerlProc_popen(name,mode);
482 }
50952442 483 IoTYPE(io) = IoTYPE_PIPE;
1771866f 484 if (num_svs) {
294b3b39
AL
485 while (isSPACE(*type))
486 type++;
1771866f
NIS
487 if (*type) {
488 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
489 goto say_false;
490 }
491 }
492 }
a687059c 493 }
c2be40b1 494 else { /* layer(Args) */
6170680b 495 if (num_svs)
c2be40b1 496 goto unknown_open_mode;
6170680b 497 name = type;
50952442 498 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
499 for (; isSPACE(*name); name++)
500 ;
88b61e10 501 mode[0] = 'r';
0c19750d 502
0c19750d 503 if (in_raw)
28f0d0ec 504 my_strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 505 else if (in_crlf)
28f0d0ec 506 my_strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 507
770526c1 508 if (*name == '-' && name[1] == '\0') {
760ac839 509 fp = PerlIO_stdin();
50952442 510 IoTYPE(io) = IoTYPE_STD;
a687059c 511 }
16fe6d59 512 else {
ee518936 513 if (!num_svs) {
2b2a7552 514 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
515 num_svs = 1;
516 svp = &namesv;
bd61b366 517 type = NULL;
ee518936 518 }
6e60e805 519 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 520 }
a687059c
LW
521 }
522 }
bee1dbe2 523 if (!fp) {
ce44635a 524 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 525 && strchr(oname, '\n')
ce44635a 526
041457d9 527 )
9014280d 528 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 529 goto say_false;
bee1dbe2 530 }
a00b5bd3
NIS
531
532 if (ckWARN(WARN_IO)) {
533 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
534 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 535 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
536 "Filehandle STD%s reopened as %s only for input",
537 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
538 GvENAME(gv));
a00b5bd3 539 }
ee518936 540 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 541 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
542 "Filehandle STDIN reopened as %s only for output",
543 GvENAME(gv));
a00b5bd3
NIS
544 }
545 }
546
e99cca91 547 fd = PerlIO_fileno(fp);
e934609f
JH
548 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
549 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
550 * type probe for socket-ness.
551 */
552 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
553 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
554 /* If PerlIO claims to have fd we had better be able to fstat() it. */
555 (void) PerlIO_close(fp);
6e21c824 556 goto say_false;
a687059c 557 }
7114a2d2 558#ifndef PERL_MICRO
3280af22 559 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 560 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
561#ifdef HAS_SOCKET
562 else if (
c623bd54 563#ifdef S_IFMT
3280af22 564 !(PL_statbuf.st_mode & S_IFMT)
99b89507 565#else
b28d0864 566 !PL_statbuf.st_mode
99b89507 567#endif
0759c907
JH
568 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
569 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
570 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
571 char tmpbuf[256];
572 Sock_size_t buflen = sizeof tmpbuf;
573 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
574 || errno != ENOTSOCK)
575 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
576 /* but some return 0 for streams too, sigh */
99b89507 577 }
e99cca91 578#endif /* HAS_SOCKET */
7114a2d2 579#endif /* !PERL_MICRO */
a687059c 580 }
e99cca91
NIS
581
582 /* Eeek - FIXME !!!
583 * If this is a standard handle we discard all the layer stuff
584 * and just dup the fd into whatever was on the handle before !
585 */
586
6e21c824 587 if (saveifp) { /* must use old fp? */
f5b9d040 588 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 589 then dup the new fileno down
f5b9d040 590 */
6e21c824 591 if (saveofp) {
f5b9d040 592 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 593 if (saveofp != saveifp) { /* was a socket? */
760ac839 594 PerlIO_close(saveofp);
6e21c824
LW
595 }
596 }
6e60e805 597 if (savefd != fd) {
e934609f 598 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
599 is assigned to (say) STDOUT - for now let dup2() fail
600 and provide the error
601 */
bd4a5668
NIS
602 if (PerlLIO_dup2(fd, savefd) < 0) {
603 (void)PerlIO_close(fp);
604 goto say_false;
605 }
d082dcd6 606#ifdef VMS
6e60e805 607 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
608 char newname[FILENAME_MAX+1];
609 if (PerlIO_getname(fp, newname)) {
610 if (fd == PerlIO_fileno(PerlIO_stdout()))
611 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
612 if (fd == PerlIO_fileno(PerlIO_stderr()))
613 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
614 }
d082dcd6
JH
615 }
616#endif
d0e2cf63
AMS
617
618#if !defined(WIN32)
619 /* PL_fdpid isn't used on Windows, so avoid this useless work.
620 * XXX Probably the same for a lot of other places. */
621 {
622 Pid_t pid;
623 SV *sv;
624
625 LOCK_FDPID_MUTEX;
626 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 627 SvUPGRADE(sv, SVt_IV);
d0e2cf63 628 pid = SvIVX(sv);
45977657 629 SvIV_set(sv, 0);
d0e2cf63 630 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 631 SvUPGRADE(sv, SVt_IV);
45977657 632 SvIV_set(sv, pid);
d0e2cf63
AMS
633 UNLOCK_FDPID_MUTEX;
634 }
635#endif
636
e212fc47
AMS
637 if (was_fdopen) {
638 /* need to close fp without closing underlying fd */
639 int ofd = PerlIO_fileno(fp);
640 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
641#if defined(HAS_FCNTL) && defined(F_SETFD)
642 /* Assume if we have F_SETFD we have F_GETFD */
643 int coe = fcntl(ofd,F_GETFD);
644#endif
e212fc47
AMS
645 PerlIO_close(fp);
646 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
647#if defined(HAS_FCNTL) && defined(F_SETFD)
648 /* The dup trick has lost close-on-exec on ofd */
649 fcntl(ofd,F_SETFD, coe);
650#endif
e212fc47 651 PerlLIO_close(dupfd);
ecdeb87c 652 }
e212fc47
AMS
653 else
654 PerlIO_close(fp);
6e21c824
LW
655 }
656 fp = saveifp;
760ac839 657 PerlIO_clearerr(fp);
e99cca91 658 fd = PerlIO_fileno(fp);
6e21c824 659 }
a0d0e21e 660#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 661 if (fd >= 0) {
0bcc34c2 662 const int save_errno = errno;
a8710ca1
GS
663 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
664 errno = save_errno;
665 }
1462b684 666#endif
8990e307 667 IoIFP(io) = fp;
b931b1d9 668
684bef36 669 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 670 if (writing) {
50952442 671 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 672 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 673 char *s = mode;
3b6c1aba
JH
674 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
675 s++;
a33cf58c 676 *s = 'w';
1feb1812 677 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 678 PerlIO_close(fp);
4608196e 679 IoIFP(io) = NULL;
6e21c824 680 goto say_false;
fe14fcc3 681 }
1462b684
LW
682 }
683 else
8990e307 684 IoOFP(io) = fp;
bf38876a 685 }
a687059c 686 return TRUE;
6e21c824
LW
687
688say_false:
8990e307
LW
689 IoIFP(io) = saveifp;
690 IoOFP(io) = saveofp;
691 IoTYPE(io) = savetype;
6e21c824 692 return FALSE;
a687059c
LW
693}
694
760ac839 695PerlIO *
864dbfa3 696Perl_nextargv(pTHX_ register GV *gv)
a687059c 697{
97aff369 698 dVAR;
79072805 699 register SV *sv;
99b89507 700#ifndef FLEXFILENAMES
c623bd54
LW
701 int filedev;
702 int fileino;
99b89507 703#endif
761237fe
JB
704 Uid_t fileuid;
705 Gid_t filegid;
2d03de9c 706 IO * const io = GvIOp(gv);
fe14fcc3 707
3280af22 708 if (!PL_argvoutgv)
fafc274c 709 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
18708f5a
GS
710 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
711 IoFLAGS(io) &= ~IOf_START;
7a1c5554 712 if (PL_inplace) {
294b3b39 713 assert(PL_defoutgv);
29a861e7
NC
714 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
715 SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 716 }
18708f5a 717 }
3280af22
NIS
718 if (PL_filemode & (S_ISUID|S_ISGID)) {
719 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 720#ifdef HAS_FCHMOD
c797f2d8
DM
721 if (PL_lastfd != -1)
722 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 723#else
b28d0864 724 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
725#endif
726 }
c797f2d8 727 PL_lastfd = -1;
3280af22 728 PL_filemode = 0;
5c501b37 729 if (!GvAV(gv))
4608196e 730 return NULL;
79072805 731 while (av_len(GvAV(gv)) >= 0) {
85aff577 732 STRLEN oldlen;
79072805 733 sv = av_shift(GvAV(gv));
8990e307 734 SAVEFREESV(sv);
e203899d 735 sv_setsv(GvSVn(gv),sv);
79072805 736 SvSETMAGIC(GvSV(gv));
3280af22 737 PL_oldname = SvPVx(GvSV(gv), oldlen);
4608196e 738 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
3280af22 739 if (PL_inplace) {
79072805 740 TAINT_PROPER("inplace open");
3280af22 741 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC
742 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
743 SVt_PVIO));
a0d0e21e 744 return IoIFP(GvIOp(gv));
c623bd54 745 }
99b89507 746#ifndef FLEXFILENAMES
b28d0864
NIS
747 filedev = PL_statbuf.st_dev;
748 fileino = PL_statbuf.st_ino;
99b89507 749#endif
3280af22
NIS
750 PL_filemode = PL_statbuf.st_mode;
751 fileuid = PL_statbuf.st_uid;
752 filegid = PL_statbuf.st_gid;
753 if (!S_ISREG(PL_filemode)) {
0453d815 754 if (ckWARN_d(WARN_INPLACE))
9014280d 755 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
756 "Can't do inplace edit: %s is not a regular file",
757 PL_oldname );
79072805 758 do_close(gv,FALSE);
c623bd54
LW
759 continue;
760 }
3280af22 761 if (*PL_inplace) {
2d03de9c 762 const char *star = strchr(PL_inplace, '*');
2d259d92 763 if (star) {
2d03de9c 764 const char *begin = PL_inplace;
2d259d92
CK
765 sv_setpvn(sv, "", 0);
766 do {
767 sv_catpvn(sv, begin, star - begin);
3280af22 768 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
769 begin = ++star;
770 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
771 if (*begin)
772 sv_catpv(sv,begin);
2d259d92
CK
773 }
774 else {
3280af22 775 sv_catpv(sv,PL_inplace);
2d259d92 776 }
c623bd54 777#ifndef FLEXFILENAMES
95a20fc0 778 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
779 && PL_statbuf.st_dev == filedev
780 && PL_statbuf.st_ino == fileino)
39e571d4 781#ifdef DJGPP
5f74f29c 782 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 783#endif
f248d071
GS
784 )
785 {
786 if (ckWARN_d(WARN_INPLACE))
9014280d 787 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d 788 "Can't do inplace edit: %"SVf" would not be unique",
be2597df 789 SVfARG(sv));
79072805 790 do_close(gv,FALSE);
c623bd54
LW
791 continue;
792 }
793#endif
fe14fcc3 794#ifdef HAS_RENAME
2585f9a3 795#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 796 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 797 if (ckWARN_d(WARN_INPLACE))
9014280d 798 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d 799 "Can't rename %s to %"SVf": %s, skipping file",
be2597df 800 PL_oldname, SVfARG(sv), Strerror(errno));
79072805 801 do_close(gv,FALSE);
c623bd54
LW
802 continue;
803 }
a687059c 804#else
79072805 805 do_close(gv,FALSE);
95a20fc0
SP
806 (void)PerlLIO_unlink(SvPVX_const(sv));
807 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
93524f2b 808 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
4608196e 809 O_RDONLY,0,NULL);
55497cff 810#endif /* DOSISH */
ff8e2863 811#else
95a20fc0
SP
812 (void)UNLINK(SvPVX_const(sv));
813 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 814 if (ckWARN_d(WARN_INPLACE))
9014280d 815 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d 816 "Can't rename %s to %"SVf": %s, skipping file",
be2597df 817 PL_oldname, SVfARG(sv), Strerror(errno) );
79072805 818 do_close(gv,FALSE);
c623bd54
LW
819 continue;
820 }
b28d0864 821 (void)UNLINK(PL_oldname);
a687059c
LW
822#endif
823 }
824 else {
c030f24b 825#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 826# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 827 if (UNLINK(PL_oldname) < 0) {
0453d815 828 if (ckWARN_d(WARN_INPLACE))
9014280d 829 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
830 "Can't remove %s: %s, skipping file",
831 PL_oldname, Strerror(errno) );
79072805 832 do_close(gv,FALSE);
fe14fcc3
LW
833 continue;
834 }
edc7bc49 835# endif
ff8e2863 836#else
cea2e8a9 837 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 838#endif
a687059c
LW
839 }
840
3280af22
NIS
841 sv_setpvn(sv,">",!PL_inplace);
842 sv_catpvn(sv,PL_oldname,oldlen);
748a9306 843 SETERRNO(0,0); /* in case sprintf set errno */
4119ab01 844#ifdef VMS
93524f2b 845 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
4608196e 846 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,NULL))
4119ab01 847#else
93524f2b
NC
848 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
849 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
4608196e 850 NULL))
4119ab01 851#endif
18708f5a 852 {
0453d815 853 if (ckWARN_d(WARN_INPLACE))
9014280d 854 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
0453d815 855 PL_oldname, Strerror(errno) );
79072805 856 do_close(gv,FALSE);
fe14fcc3
LW
857 continue;
858 }
3280af22
NIS
859 setdefout(PL_argvoutgv);
860 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
861 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 862#ifdef HAS_FCHMOD
3280af22 863 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 864#else
3e3baf6d
TB
865# if !(defined(WIN32) && defined(__BORLANDC__))
866 /* Borland runtime creates a readonly file! */
b28d0864 867 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 868# endif
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 {
35da51f7 905 GV * const oldout = (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;
a0d0e21e 925 if (!gv || SvTYPE(gv) != SVt_PVGV) {
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) {
2dd78f96
JH
933 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
934 report_evil_fh(gv, io, PL_op->op_type);
93189314 935 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 936 }
a687059c
LW
937 return FALSE;
938 }
f2b5be74 939 retval = io_close(io, not_implicit);
517844ec 940 if (not_implicit) {
1193dd27
IZ
941 IoLINES(io) = 0;
942 IoPAGE(io) = 0;
943 IoLINES_LEFT(io) = IoPAGE_LEN(io);
944 }
50952442 945 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
946 return retval;
947}
948
949bool
f2b5be74 950Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27 951{
97aff369 952 dVAR;
1193dd27 953 bool retval = FALSE;
1193dd27 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
79072805 994 if (!io)
a687059c 995 return TRUE;
041457d9 996 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
06bcfee8 997 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
a687059c 998
8990e307 999 while (IoIFP(io)) {
760ac839 1000 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1001 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1002 return FALSE; /* this is the most usual case */
1003 }
a687059c 1004
79852593
NC
1005 {
1006 /* getc and ungetc can stomp on errno */
1007 const int saverrno = errno;
1008 const int ch = PerlIO_getc(IoIFP(io));
1009 if (ch != EOF) {
1010 (void)PerlIO_ungetc(IoIFP(io),ch);
1011 errno = saverrno;
1012 return FALSE;
1013 }
505fdf5d 1014 errno = saverrno;
a687059c 1015 }
fab3f3a7 1016
760ac839 1017 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1018 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1019 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1020 }
533c011a 1021 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1022 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1023 return TRUE;
1024 }
1025 else
1026 return TRUE; /* normal fp, definitely end of file */
1027 }
1028 return TRUE;
1029}
1030
5ff3f7a4 1031Off_t
864dbfa3 1032Perl_do_tell(pTHX_ GV *gv)
a687059c 1033{
97aff369 1034 dVAR;
cbbf8932 1035 register IO *io = NULL;
96e4d5b1 1036 register PerlIO *fp;
a687059c 1037
96e4d5b1 1038 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1039#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1040 if (PerlIO_eof(fp))
1041 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1042#endif
8903cb82 1043 return PerlIO_tell(fp);
96e4d5b1 1044 }
411caa50
JH
1045 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1046 report_evil_fh(gv, io, PL_op->op_type);
93189314 1047 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1048 return (Off_t)-1;
a687059c
LW
1049}
1050
1051bool
864dbfa3 1052Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1053{
97aff369 1054 dVAR;
cbbf8932 1055 register IO *io = NULL;
137443ea 1056 register PerlIO *fp;
a687059c 1057
137443ea 1058 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1059#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1060 if (PerlIO_eof(fp))
1061 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1062#endif
8903cb82 1063 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1064 }
411caa50
JH
1065 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1066 report_evil_fh(gv, io, PL_op->op_type);
93189314 1067 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1068 return FALSE;
1069}
1070
97cc44eb 1071Off_t
864dbfa3 1072Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1073{
97aff369 1074 dVAR;
cbbf8932 1075 register IO *io = NULL;
8903cb82
PP
1076 register PerlIO *fp;
1077
1078 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
3028581b 1079 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
411caa50
JH
1080 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1081 report_evil_fh(gv, io, PL_op->op_type);
93189314 1082 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1083 return (Off_t)-1;
8903cb82
PP
1084}
1085
6ff81951 1086int
16fe6d59
GS
1087Perl_mode_from_discipline(pTHX_ SV *discp)
1088{
1089 int mode = O_BINARY;
1090 if (discp) {
1091 STRLEN len;
e62f0680 1092 const char *s = SvPV_const(discp,len);
16fe6d59
GS
1093 while (*s) {
1094 if (*s == ':') {
1095 switch (s[1]) {
1096 case 'r':
e963d6d2 1097 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1098 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1099 {
1100 mode = O_BINARY;
1101 s += 4;
1102 len -= 4;
1103 break;
1104 }
1105 /* FALL THROUGH */
1106 case 'c':
e963d6d2 1107 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1108 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1109 {
1110 mode = O_TEXT;
1111 s += 5;
1112 len -= 5;
1113 break;
1114 }
1115 /* FALL THROUGH */
1116 default:
1117 goto fail_discipline;
1118 }
1119 }
1120 else if (isSPACE(*s)) {
1121 ++s;
1122 --len;
1123 }
1124 else {
4373e329 1125 const char *end;
16fe6d59
GS
1126fail_discipline:
1127 end = strchr(s+1, ':');
1128 if (!end)
1129 end = s+len;
60382766 1130#ifndef PERLIO_LAYERS
363c40c4 1131 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1132#else
18a33fb5 1133 len -= end-s;
60382766
NIS
1134 s = end;
1135#endif
16fe6d59
GS
1136 }
1137 }
1138 }
1139 return mode;
1140}
1141
58e24eff 1142#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1143I32
1144my_chsize(int fd, Off_t length)
6eb13c3b 1145{
58e24eff
SH
1146#ifdef F_FREESP
1147 /* code courtesy of William Kucharski */
1148#define HAS_CHSIZE
1149
c623ac67 1150 Stat_t filebuf;
6eb13c3b 1151
3028581b 1152 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1153 return -1;
1154
1155 if (filebuf.st_size < length) {
1156
1157 /* extend file length */
1158
3028581b 1159 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1160 return -1;
1161
1162 /* write a "0" byte */
1163
3028581b 1164 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1165 return -1;
1166 }
1167 else {
1168 /* truncate length */
35da51f7 1169 struct flock fl;
6eb13c3b
LW
1170 fl.l_whence = 0;
1171 fl.l_len = 0;
1172 fl.l_start = length;
a0d0e21e 1173 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1174
1175 /*
a0d0e21e 1176 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1177 * fcntl(2), which truncates the file so that it ends at the
1178 * position indicated by fl.l_start.
1179 *
1180 * Will minor miracles never cease?
1181 */
1182
a0d0e21e 1183 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1184 return -1;
1185
1186 }
6eb13c3b 1187 return 0;
58e24eff 1188#else
27da23d5 1189 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1190#endif /* F_FREESP */
27da23d5 1191 return -1;
58e24eff
SH
1192}
1193#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1194
a687059c 1195bool
864dbfa3 1196Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1197{
97aff369 1198 dVAR;
79072805
LW
1199 /* assuming fp is checked earlier */
1200 if (!sv)
1201 return TRUE;
e9950d3b
NC
1202 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1203 assert(!SvGMAGICAL(sv));
1204 if (SvIsUV(sv))
1205 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1206 else
1207 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1208 return !PerlIO_error(fp);
1209 }
1210 else {
1211 STRLEN len;
676f44e7 1212 /* Do this first to trigger any overloading. */
e9950d3b
NC
1213 const char *tmps = SvPV_const(sv, len);
1214 U8 *tmpbuf = NULL;
1215 bool happy = TRUE;
1216
7d59b7e4 1217 if (PerlIO_isutf8(fp)) {
676f44e7
NC
1218 if (!SvUTF8(sv)) {
1219 /* We don't modify the original scalar. */
1220 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1221 tmps = (char *) tmpbuf;
1222 }
7d59b7e4 1223 }
ae798467 1224 else if (DO_UTF8(sv)) {
676f44e7
NC
1225 STRLEN tmplen = len;
1226 bool utf8 = TRUE;
35da51f7 1227 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7
NC
1228 if (!utf8) {
1229 tmpbuf = result;
1230 tmps = (char *) tmpbuf;
1231 len = tmplen;
1232 }
1233 else {
1234 assert((char *)result == tmps);
1235 if (ckWARN_d(WARN_UTF8)) {
1236 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1237 "Wide character in print");
1238 }
ae798467
NIS
1239 }
1240 }
e9950d3b
NC
1241 /* To detect whether the process is about to overstep its
1242 * filesize limit we would need getrlimit(). We could then
1243 * also transparently raise the limit with setrlimit() --
1244 * but only until the system hard limit/the filesystem limit,
1245 * at which we would get EPERM. Note that when using buffered
1246 * io the write failure can be delayed until the flush/close. --jhi */
1247 if (len && (PerlIO_write(fp,tmps,len) == 0))
1248 happy = FALSE;
1249 Safefree(tmpbuf);
1250 return happy ? !PerlIO_error(fp) : FALSE;
ff8e2863 1251 }
a687059c
LW
1252}
1253
79072805 1254I32
cea2e8a9 1255Perl_my_stat(pTHX)
a687059c 1256{
97aff369 1257 dVAR;
39644a26 1258 dSP;
79072805 1259 IO *io;
2dd78f96 1260 GV* gv;
79072805 1261
533c011a 1262 if (PL_op->op_flags & OPf_REF) {
924508f0 1263 EXTEND(SP,1);
2dd78f96 1264 gv = cGVOP_gv;
748a9306 1265 do_fstat:
5228a96c
SP
1266 if (gv == PL_defgv)
1267 return PL_laststatval;
2dd78f96 1268 io = GvIO(gv);
ad02613c 1269 do_fstat_have_io:
5228a96c
SP
1270 PL_laststype = OP_STAT;
1271 PL_statgv = gv;
1272 sv_setpvn(PL_statname, "", 0);
1273 if(io) {
1274 if (IoIFP(io)) {
1275 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1276 } else if (IoDIRP(io)) {
3497a01f 1277 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
5228a96c
SP
1278 } else {
1279 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1280 report_evil_fh(gv, io, PL_op->op_type);
1281 return (PL_laststatval = -1);
1282 }
1283 } else {
1284 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1285 report_evil_fh(gv, io, PL_op->op_type);
1286 return (PL_laststatval = -1);
1287 }
a687059c 1288 }
fbb0b3b3
RGS
1289 else if (PL_op->op_private & OPpFT_STACKED) {
1290 return PL_laststatval;
1291 }
a687059c 1292 else {
0bcc34c2 1293 SV* const sv = POPs;
4373e329 1294 const char *s;
4ecd490c 1295 STRLEN len;
79072805 1296 PUTBACK;
748a9306 1297 if (SvTYPE(sv) == SVt_PVGV) {
2dd78f96 1298 gv = (GV*)sv;
748a9306
LW
1299 goto do_fstat;
1300 }
1301 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
2dd78f96 1302 gv = (GV*)SvRV(sv);
748a9306
LW
1303 goto do_fstat;
1304 }
ad02613c
SP
1305 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1306 io = (IO*)SvRV(sv);
7f39519f 1307 gv = NULL;
ad02613c
SP
1308 goto do_fstat_have_io;
1309 }
748a9306 1310
5c144d81 1311 s = SvPV_const(sv, len);
a0714e2c 1312 PL_statgv = NULL;
4ecd490c 1313 sv_setpvn(PL_statname, s, len);
95a20fc0 1314 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1315 PL_laststype = OP_STAT;
1316 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1317 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1318 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1319 return PL_laststatval;
a687059c
LW
1320 }
1321}
1322
fbb0b3b3 1323
79072805 1324I32
cea2e8a9 1325Perl_my_lstat(pTHX)
c623bd54 1326{
97aff369 1327 dVAR;
0bd48802 1328 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1329 dSP;
79072805 1330 SV *sv;
533c011a 1331 if (PL_op->op_flags & OPf_REF) {
924508f0 1332 EXTEND(SP,1);
638eceb6 1333 if (cGVOP_gv == PL_defgv) {
3280af22 1334 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1335 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1336 return PL_laststatval;
fe14fcc3 1337 }
5d3e98de 1338 if (ckWARN(WARN_IO)) {
9014280d 1339 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1340 GvENAME(cGVOP_gv));
1341 return (PL_laststatval = -1);
1342 }
fe14fcc3 1343 }
041457d9
DM
1344 else if (PL_laststype != OP_LSTAT
1345 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
fbb0b3b3 1346 Perl_croak(aTHX_ no_prev_lstat);
c623bd54 1347
3280af22 1348 PL_laststype = OP_LSTAT;
a0714e2c 1349 PL_statgv = NULL;
79072805
LW
1350 sv = POPs;
1351 PUTBACK;
5d3e98de 1352 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
9014280d 1353 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1354 GvENAME((GV*) SvRV(sv)));
1355 return (PL_laststatval = -1);
1356 }
4373e329 1357 /* XXX Do really need to be calling SvPV() all these times? */
e62f0680
NC
1358 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1359 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1360 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
9014280d 1361 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1362 return PL_laststatval;
c623bd54
LW
1363}
1364
a0f2c8ec
JD
1365static void
1366S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1367{
1368 const int e = errno;
1369 if (ckWARN(WARN_EXEC))
1370 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1371 cmd, Strerror(e));
1372 if (do_report) {
1373 PerlLIO_write(fd, (void*)&e, sizeof(int));
1374 PerlLIO_close(fd);
1375 }
1376}
1377
d5a9bfb0 1378bool
2aa1486d
GS
1379Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1380 int fd, int do_report)
d5a9bfb0 1381{
27da23d5 1382 dVAR;
9c12f1e5 1383#if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
cd39f2b6
JH
1384 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1385#else
79072805 1386 if (sp > mark) {
c3c5fad7 1387 char **a;
6136c704 1388 const char *tmps = NULL;
c3c5fad7
DM
1389 Newx(PL_Argv, sp - mark + 1, char*);
1390 a = PL_Argv;
890ce7af 1391
79072805
LW
1392 while (++mark <= sp) {
1393 if (*mark)
e62f0680 1394 *a++ = (char*)SvPV_nolen_const(*mark);
a687059c
LW
1395 else
1396 *a++ = "";
1397 }
6136c704 1398 *a = NULL;
91b2752f 1399 if (really)
e62f0680 1400 tmps = SvPV_nolen_const(really);
91b2752f
RG
1401 if ((!really && *PL_Argv[0] != '/') ||
1402 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1403 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1404 PERL_FPU_PRE_EXEC
91b2752f 1405 if (really && *tmps)
b4748376 1406 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1407 else
b4748376 1408 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1409 PERL_FPU_POST_EXEC
a0f2c8ec 1410 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
a687059c 1411 }
bee1dbe2 1412 do_execfree();
cd39f2b6 1413#endif
a687059c
LW
1414 return FALSE;
1415}
1416
fe14fcc3 1417void
864dbfa3 1418Perl_do_execfree(pTHX)
ff8e2863 1419{
97aff369 1420 dVAR;
43c5f42d 1421 Safefree(PL_Argv);
4608196e 1422 PL_Argv = NULL;
43c5f42d 1423 Safefree(PL_Cmd);
bd61b366 1424 PL_Cmd = NULL;
ff8e2863
LW
1425}
1426
9555a685 1427#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1428
1429bool
2fbb330f 1430Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1431{
27da23d5 1432 dVAR;
a687059c
LW
1433 register char **a;
1434 register char *s;
15db3ae2 1435 char *buf;
2fbb330f 1436 char *cmd;
2fbb330f
JM
1437
1438 /* Make a copy so we can change it */
6fca0082 1439 const Size_t cmdlen = strlen(incmd) + 1;
15db3ae2
DM
1440 Newx(buf, cmdlen, char);
1441 cmd = buf;
cfff9797 1442 memcpy(cmd, incmd, cmdlen);
a687059c 1443
748a9306
LW
1444 while (*cmd && isSPACE(*cmd))
1445 cmd++;
1446
a687059c
LW
1447 /* save an extra exec if possible */
1448
bf38876a 1449#ifdef CSH
d05c1ba0 1450 {
0c19750d 1451 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1452 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1453 strnEQ(cmd+PL_cshlen," -c",3)) {
28f0d0ec 1454 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
d05c1ba0
JH
1455 s = cmd+PL_cshlen+3;
1456 if (*s == 'f') {
1457 s++;
28f0d0ec 1458 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
d05c1ba0
JH
1459 }
1460 if (*s == ' ')
1461 s++;
1462 if (*s++ == '\'') {
0bcc34c2 1463 char * const ncmd = s;
d05c1ba0
JH
1464
1465 while (*s)
1466 s++;
1467 if (s[-1] == '\n')
1468 *--s = '\0';
1469 if (s[-1] == '\'') {
1470 *--s = '\0';
b35112e7 1471 PERL_FPU_PRE_EXEC
7c0dd7ca 1472 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
b35112e7 1473 PERL_FPU_POST_EXEC
d05c1ba0 1474 *s = '\'';
a0f2c8ec 1475 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
15db3ae2 1476 Safefree(buf);
d05c1ba0
JH
1477 return FALSE;
1478 }
1479 }
a687059c
LW
1480 }
1481 }
bf38876a 1482#endif /* CSH */
a687059c
LW
1483
1484 /* see if there are shell metacharacters in it */
1485
748a9306
LW
1486 if (*cmd == '.' && isSPACE(cmd[1]))
1487 goto doshell;
1488
1489 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1490 goto doshell;
1491
294b3b39
AL
1492 s = cmd;
1493 while (isALNUM(*s))
1494 s++; /* catch VAR=val gizmo */
63f2c1e1
LW
1495 if (*s == '=')
1496 goto doshell;
748a9306 1497
a687059c 1498 for (s = cmd; *s; s++) {
d05c1ba0
JH
1499 if (*s != ' ' && !isALPHA(*s) &&
1500 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1501 if (*s == '\n' && !s[1]) {
1502 *s = '\0';
1503 break;
1504 }
603a98b0
IZ
1505 /* handle the 2>&1 construct at the end */
1506 if (*s == '>' && s[1] == '&' && s[2] == '1'
1507 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1508 && (!s[3] || isSPACE(s[3])))
1509 {
6867be6d 1510 const char *t = s + 3;
603a98b0
IZ
1511
1512 while (*t && isSPACE(*t))
1513 ++t;
943bbd07 1514 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1515 s[-2] = '\0';
1516 break;
1517 }
1518 }
a687059c 1519 doshell:
b35112e7 1520 PERL_FPU_PRE_EXEC
7c0dd7ca 1521 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
b35112e7 1522 PERL_FPU_POST_EXEC
a0f2c8ec 1523 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
15db3ae2 1524 Safefree(buf);
a687059c
LW
1525 return FALSE;
1526 }
1527 }
748a9306 1528
a02a5408 1529 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
3280af22
NIS
1530 PL_Cmd = savepvn(cmd, s-cmd);
1531 a = PL_Argv;
1532 for (s = PL_Cmd; *s;) {
294b3b39
AL
1533 while (isSPACE(*s))
1534 s++;
a687059c
LW
1535 if (*s)
1536 *(a++) = s;
294b3b39
AL
1537 while (*s && !isSPACE(*s))
1538 s++;
a687059c
LW
1539 if (*s)
1540 *s++ = '\0';
1541 }
6136c704 1542 *a = NULL;
3280af22 1543 if (PL_Argv[0]) {
b35112e7 1544 PERL_FPU_PRE_EXEC
3280af22 1545 PerlProc_execvp(PL_Argv[0],PL_Argv);
b35112e7 1546 PERL_FPU_POST_EXEC
b1248f16 1547 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1548 do_execfree();
a687059c 1549 goto doshell;
b1248f16 1550 }
a0f2c8ec 1551 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
a687059c 1552 }
ff8e2863 1553 do_execfree();
15db3ae2 1554 Safefree(buf);
a687059c
LW
1555 return FALSE;
1556}
1557
6890e559 1558#endif /* OS2 || WIN32 */
760ac839 1559
79072805 1560I32
864dbfa3 1561Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1562{
97aff369 1563 dVAR;
79072805 1564 register I32 val;
79072805 1565 register I32 tot = 0;
4634a855 1566 const char *const what = PL_op_name[type];
5c144d81 1567 const char *s;
890ce7af 1568 SV ** const oldmark = mark;
a687059c 1569
1444765e
NC
1570 /* Doing this ahead of the switch statement preserves the old behaviour,
1571 where attempting to use kill as a taint test test would fail on
1572 platforms where kill was not defined. */
1573#ifndef HAS_KILL
1574 if (type == OP_KILL)
4634a855 1575 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1576#endif
1577#ifndef HAS_CHOWN
1578 if (type == OP_CHOWN)
4634a855 1579 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1580#endif
1581
1582
20408e3c 1583#define APPLY_TAINT_PROPER() \
3280af22 1584 STMT_START { \
17406bd6 1585 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1586 } STMT_END
20408e3c
GS
1587
1588 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1589 if (PL_tainting) {
463ee0b2 1590 while (++mark <= sp) {
bbce6d69
PP
1591 if (SvTAINTED(*mark)) {
1592 TAINT;
1593 break;
1594 }
463ee0b2
LW
1595 }
1596 mark = oldmark;
1597 }
a687059c 1598 switch (type) {
79072805 1599 case OP_CHMOD:
20408e3c 1600 APPLY_TAINT_PROPER();
79072805 1601 if (++mark <= sp) {
4ea561bc 1602 val = SvIV(*mark);
20408e3c
GS
1603 APPLY_TAINT_PROPER();
1604 tot = sp - mark;
79072805 1605 while (++mark <= sp) {
c4aca7d0
GA
1606 GV* gv;
1607 if (SvTYPE(*mark) == SVt_PVGV) {
1608 gv = (GV*)*mark;
1609 do_fchmod:
1610 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1611#ifdef HAS_FCHMOD
1612 APPLY_TAINT_PROPER();
1613 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1614 tot--;
1615#else
b9c6780e 1616 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1617#endif
1618 }
1619 else {
1620 tot--;
1621 }
1622 }
1623 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1624 gv = (GV*)SvRV(*mark);
1625 goto do_fchmod;
1626 }
1627 else {
1628 const char *name = SvPV_nolen_const(*mark);
1629 APPLY_TAINT_PROPER();
1630 if (PerlLIO_chmod(name, val))
1631 tot--;
1632 }
a687059c
LW
1633 }
1634 }
1635 break;
fe14fcc3 1636#ifdef HAS_CHOWN
79072805 1637 case OP_CHOWN:
20408e3c 1638 APPLY_TAINT_PROPER();
79072805 1639 if (sp - mark > 2) {
6867be6d 1640 register I32 val2;
463ee0b2
LW
1641 val = SvIVx(*++mark);
1642 val2 = SvIVx(*++mark);
20408e3c 1643 APPLY_TAINT_PROPER();
a0d0e21e 1644 tot = sp - mark;
79072805 1645 while (++mark <= sp) {
c4aca7d0
GA
1646 GV* gv;
1647 if (SvTYPE(*mark) == SVt_PVGV) {
1648 gv = (GV*)*mark;
1649 do_fchown:
1650 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1651#ifdef HAS_FCHOWN
1652 APPLY_TAINT_PROPER();
1653 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1654 tot--;
1655#else
b9c6780e 1656 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1657#endif
1658 }
1659 else {
1660 tot--;
1661 }
1662 }
1663 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1664 gv = (GV*)SvRV(*mark);
1665 goto do_fchown;
1666 }
1667 else {
1668 const char *name = SvPV_nolen_const(*mark);
1669 APPLY_TAINT_PROPER();
1670 if (PerlLIO_chown(name, val, val2))
1671 tot--;
1672 }
a687059c
LW
1673 }
1674 }
1675 break;
b1248f16 1676#endif
a1d180c4 1677/*
dd64f1c3
AD
1678XXX Should we make lchown() directly available from perl?
1679For now, we'll let Configure test for HAS_LCHOWN, but do
1680nothing in the core.
1681 --AD 5/1998
1682*/
fe14fcc3 1683#ifdef HAS_KILL
79072805 1684 case OP_KILL:
20408e3c 1685 APPLY_TAINT_PROPER();
55497cff
PP
1686 if (mark == sp)
1687 break;
e62f0680 1688 s = SvPVx_nolen_const(*++mark);
e02bfb16 1689 if (isALPHA(*s)) {
79072805
LW
1690 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1691 s += 3;
e02bfb16 1692 if ((val = whichsig(s)) < 0)
cea2e8a9 1693 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1694 }
1695 else
4ea561bc 1696 val = SvIV(*mark);
20408e3c
GS
1697 APPLY_TAINT_PROPER();
1698 tot = sp - mark;
3595fcef
PP
1699#ifdef VMS
1700 /* kill() doesn't do process groups (job trees?) under VMS */
1701 if (val < 0) val = -val;
1702 if (val == SIGKILL) {
1703# include <starlet.h>
1704 /* Use native sys$delprc() to insure that target process is
1705 * deleted; supervisor-mode images don't pay attention to
1706 * CRTL's emulation of Unix-style signals and kill()
1707 */
1708 while (++mark <= sp) {
4ea561bc 1709 I32 proc = SvIV(*mark);
3595fcef 1710 register unsigned long int __vmssts;
20408e3c 1711 APPLY_TAINT_PROPER();
3595fcef
PP
1712 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1713 tot--;
1714 switch (__vmssts) {
1715 case SS$_NONEXPR:
1716 case SS$_NOSUCHNODE:
1717 SETERRNO(ESRCH,__vmssts);
1718 break;
1719 case SS$_NOPRIV:
1720 SETERRNO(EPERM,__vmssts);
1721 break;
1722 default:
1723 SETERRNO(EVMSERR,__vmssts);
1724 }
1725 }
1726 }
1727 break;
1728 }
1729#endif
79072805
LW
1730 if (val < 0) {
1731 val = -val;
1732 while (++mark <= sp) {
4ea561bc 1733 const I32 proc = SvIV(*mark);
20408e3c 1734 APPLY_TAINT_PROPER();
fe14fcc3 1735#ifdef HAS_KILLPG
3028581b 1736 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1737#else
3028581b 1738 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1739#endif
79072805 1740 tot--;
a687059c 1741 }
79072805
LW
1742 }
1743 else {
1744 while (++mark <= sp) {
4ea561bc 1745 const I32 proc = SvIV(*mark);
20408e3c
GS
1746 APPLY_TAINT_PROPER();
1747 if (PerlProc_kill(proc, val))
79072805 1748 tot--;
a687059c
LW
1749 }
1750 }
1751 break;
b1248f16 1752#endif
79072805 1753 case OP_UNLINK:
20408e3c 1754 APPLY_TAINT_PROPER();
79072805
LW
1755 tot = sp - mark;
1756 while (++mark <= sp) {
e62f0680 1757 s = SvPV_nolen_const(*mark);
20408e3c 1758 APPLY_TAINT_PROPER();
3280af22 1759 if (PL_euid || PL_unsafe) {
b8ffc8df 1760 if (UNLINK(s))
a687059c
LW
1761 tot--;
1762 }
1763 else { /* don't let root wipe out directories without -U */
3280af22 1764 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1765 tot--;
1766 else {
b8ffc8df 1767 if (UNLINK(s))
a687059c
LW
1768 tot--;
1769 }
1770 }
1771 }
1772 break;
e96b369d 1773#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1774 case OP_UTIME:
20408e3c 1775 APPLY_TAINT_PROPER();
79072805 1776 if (sp - mark > 2) {
e96b369d
GA
1777#if defined(HAS_FUTIMES)
1778 struct timeval utbuf[2];
1779 void *utbufp = utbuf;
1780#elif defined(I_UTIME) || defined(VMS)
663a0e37 1781 struct utimbuf utbuf;
07409e01 1782 struct utimbuf *utbufp = &utbuf;
663a0e37 1783#else
a687059c 1784 struct {
dd2821f6
GS
1785 Time_t actime;
1786 Time_t modtime;
a687059c 1787 } utbuf;
07409e01 1788 void *utbufp = &utbuf;
663a0e37 1789#endif
a687059c 1790
0bcc34c2
AL
1791 SV* const accessed = *++mark;
1792 SV* const modified = *++mark;
c6f7b413 1793
6ec06612
SB
1794 /* Be like C, and if both times are undefined, let the C
1795 * library figure out what to do. This usually means
1796 * "current time". */
c6f7b413
RS
1797
1798 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1799 utbufp = NULL;
1800 else {
1801 Zero(&utbuf, sizeof utbuf, char);
e96b369d 1802#ifdef HAS_FUTIMES
4ea561bc 1803 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
e96b369d 1804 utbuf[0].tv_usec = 0;
4ea561bc 1805 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
e96b369d
GA
1806 utbuf[1].tv_usec = 0;
1807#elif defined(BIG_TIME)
4ea561bc
NC
1808 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1809 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
517844ec 1810#else
4ea561bc
NC
1811 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1812 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
517844ec 1813#endif
6ec06612 1814 }
4373e329 1815 APPLY_TAINT_PROPER();
79072805
LW
1816 tot = sp - mark;
1817 while (++mark <= sp) {
e96b369d
GA
1818 GV* gv;
1819 if (SvTYPE(*mark) == SVt_PVGV) {
1820 gv = (GV*)*mark;
1821 do_futimes:
1822 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1823#ifdef HAS_FUTIMES
1824 APPLY_TAINT_PROPER();
8b7231d9
SP
1825 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1826 (struct timeval *) utbufp))
e96b369d
GA
1827 tot--;
1828#else
1829 Perl_die(aTHX_ PL_no_func, "futimes");
1830#endif
1831 }
1832 else {
1833 tot--;
1834 }
1835 }
1836 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1837 gv = (GV*)SvRV(*mark);
1838 goto do_futimes;
1839 }
1840 else {
0bcc34c2 1841 const char * const name = SvPV_nolen_const(*mark);
e96b369d
GA
1842 APPLY_TAINT_PROPER();
1843#ifdef HAS_FUTIMES
8b7231d9 1844 if (utimes(name, (struct timeval *)utbufp))
e96b369d
GA
1845#else
1846 if (PerlLIO_utime(name, utbufp))
1847#endif
1848 tot--;
1849 }
1850
a687059c 1851 }
a687059c
LW
1852 }
1853 else
79072805 1854 tot = 0;
a687059c 1855 break;
a0d0e21e 1856#endif
a687059c
LW
1857 }
1858 return tot;
20408e3c 1859
20408e3c 1860#undef APPLY_TAINT_PROPER
a687059c
LW
1861}
1862
1863/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1864#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1865bool
ae1951c1
NC
1866Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1867/* effective is a flag, true for EUID, or for checking if the effective gid
1868 * is in the list of groups returned from getgroups().
1869 */
a687059c 1870{
97aff369 1871 dVAR;
bee1dbe2 1872#ifdef DOSISH
fe14fcc3
LW
1873 /* [Comments and code from Len Reed]
1874 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1875 * to write-protected files. The execute permission bit is set
1876 * by the Miscrosoft C library stat() function for the following:
1877 * .exe files
1878 * .com files
1879 * .bat files
1880 * directories
1881 * All files and directories are readable.
1882 * Directories and special files, e.g. "CON", cannot be
1883 * write-protected.
1884 * [Comment by Tom Dinger -- a directory can have the write-protect
1885 * bit set in the file system, but DOS permits changes to
1886 * the directory anyway. In addition, all bets are off
1887 * here for networked software, such as Novell and
1888 * Sun's PC-NFS.]
1889 */
1890
bee1dbe2
LW
1891 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1892 * too so it will actually look into the files for magic numbers
1893 */
7f4774ae 1894 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1895
55497cff 1896#else /* ! DOSISH */
3280af22 1897 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
7f4774ae 1898 if (mode == S_IXUSR) {
c623bd54 1899 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1900 return TRUE;
1901 }
1902 else
1903 return TRUE; /* root reads and writes anything */
1904 return FALSE;
1905 }
3280af22 1906 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
7f4774ae 1907 if (statbufp->st_mode & mode)
a687059c
LW
1908 return TRUE; /* ok as "user" */
1909 }
d8eceb89 1910 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 1911 if (statbufp->st_mode & mode >> 3)
a687059c
LW
1912 return TRUE; /* ok as "group" */
1913 }
7f4774ae 1914 else if (statbufp->st_mode & mode >> 6)
a687059c
LW
1915 return TRUE; /* ok as "other" */
1916 return FALSE;
55497cff 1917#endif /* ! DOSISH */
a687059c 1918}
a0d0e21e 1919#endif /* ! VMS */
a687059c 1920
d8eceb89 1921bool
ae1951c1 1922Perl_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 1923{
cd39f2b6
JH
1924#ifdef MACOS_TRADITIONAL
1925 /* This is simply not correct for AppleShare, but fix it yerself. */
1926 return TRUE;
1927#else
97aff369 1928 dVAR;
3280af22 1929 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1930 return TRUE;
fe14fcc3 1931#ifdef HAS_GETGROUPS
a687059c 1932 {
331b57bc 1933 Groups_t *gary = NULL;
79072805 1934 I32 anum;
331b57bc 1935 bool rc = FALSE;
a687059c 1936
331b57bc
SP
1937 anum = getgroups(0, gary);
1938 Newx(gary, anum, Groups_t);
1939 anum = getgroups(anum, gary);
a687059c 1940 while (--anum >= 0)
331b57bc
SP
1941 if (gary[anum] == testgid) {
1942 rc = TRUE;
1943 break;
1944 }
1945
1946 Safefree(gary);
1947 return rc;
a687059c 1948 }
c685562b 1949#else
a687059c 1950 return FALSE;
cd39f2b6 1951#endif
c685562b 1952#endif
a687059c 1953}
c2ab57d4 1954
fe14fcc3 1955#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1956
79072805 1957I32
864dbfa3 1958Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1959{
97aff369 1960 dVAR;
0bcc34c2 1961 const key_t key = (key_t)SvNVx(*++mark);
6867be6d
AL
1962 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1963 const I32 flags = SvIVx(*++mark);
294a48e9
AL
1964
1965 PERL_UNUSED_ARG(sp);
c2ab57d4 1966
748a9306 1967 SETERRNO(0,0);
c2ab57d4
LW
1968 switch (optype)
1969 {
fe14fcc3 1970#ifdef HAS_MSG
79072805 1971 case OP_MSGGET:
c2ab57d4 1972 return msgget(key, flags);
e5d73d77 1973#endif
fe14fcc3 1974#ifdef HAS_SEM
79072805 1975 case OP_SEMGET:
c2ab57d4 1976 return semget(key, n, flags);
e5d73d77 1977#endif
fe14fcc3 1978#ifdef HAS_SHM
79072805 1979 case OP_SHMGET:
c2ab57d4 1980 return shmget(key, n, flags);
e5d73d77 1981#endif
fe14fcc3 1982#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1983 default:
cea2e8a9 1984 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1985#endif
c2ab57d4
LW
1986 }
1987 return -1; /* should never happen */
1988}
1989
79072805 1990I32
864dbfa3 1991Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1992{
97aff369 1993 dVAR;
c2ab57d4 1994 char *a;
a0d0e21e 1995 I32 ret = -1;
6867be6d 1996 const I32 id = SvIVx(*++mark);
95b63a38 1997#ifdef Semctl
6867be6d 1998 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 1999#endif
6867be6d 2000 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
2001 SV * const astr = *++mark;
2002 STRLEN infosize = 0;
2003 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2004
0bcc34c2 2005 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
2006
2007 switch (optype)
2008 {
fe14fcc3 2009#ifdef HAS_MSG
79072805 2010 case OP_MSGCTL:
c2ab57d4
LW
2011 if (cmd == IPC_STAT || cmd == IPC_SET)
2012 infosize = sizeof(struct msqid_ds);
2013 break;
e5d73d77 2014#endif
fe14fcc3 2015#ifdef HAS_SHM
79072805 2016 case OP_SHMCTL:
c2ab57d4
LW
2017 if (cmd == IPC_STAT || cmd == IPC_SET)
2018 infosize = sizeof(struct shmid_ds);
2019 break;
e5d73d77 2020#endif
fe14fcc3 2021#ifdef HAS_SEM
79072805 2022 case OP_SEMCTL:
39398f3f 2023#ifdef Semctl
c2ab57d4
LW
2024 if (cmd == IPC_STAT || cmd == IPC_SET)
2025 infosize = sizeof(struct semid_ds);
2026 else if (cmd == GETALL || cmd == SETALL)
2027 {
8e591e46 2028 struct semid_ds semds;
bd89102f 2029 union semun semun;
e6f0bdd6
GS
2030#ifdef EXTRA_F_IN_SEMUN_BUF
2031 semun.buff = &semds;
2032#else
84902520 2033 semun.buf = &semds;
e6f0bdd6 2034#endif
c2ab57d4 2035 getinfo = (cmd == GETALL);
9b89d93d
GB
2036 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2037 return -1;
6e21c824
LW
2038 infosize = semds.sem_nsems * sizeof(short);
2039 /* "short" is technically wrong but much more portable
2040 than guessing about u_?short(_t)? */
c2ab57d4 2041 }
39398f3f 2042#else
cea2e8a9 2043 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2044#endif
c2ab57d4 2045 break;
e5d73d77 2046#endif
fe14fcc3 2047#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2048 default:
cea2e8a9 2049 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2050#endif
c2ab57d4
LW
2051 }
2052
2053 if (infosize)
2054 {
2055 if (getinfo)
2056 {
93524f2b 2057 SvPV_force_nolen(astr);
a0d0e21e 2058 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
2059 }
2060 else
2061 {
93524f2b 2062 STRLEN len;
463ee0b2
LW
2063 a = SvPV(astr, len);
2064 if (len != infosize)
cea2e8a9 2065 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
2066 PL_op_desc[optype],
2067 (unsigned long)len,
2068 (long)infosize);
c2ab57d4
LW
2069 }
2070 }
2071 else
2072 {
0bcc34c2 2073 const IV i = SvIV(astr);
56431972 2074 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2075 }
748a9306 2076 SETERRNO(0,0);
c2ab57d4
LW
2077 switch (optype)
2078 {
fe14fcc3 2079#ifdef HAS_MSG
79072805 2080 case OP_MSGCTL:
bee1dbe2 2081 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2082 break;
e5d73d77 2083#endif
fe14fcc3 2084#ifdef HAS_SEM
bd89102f 2085 case OP_SEMCTL: {
39398f3f 2086#ifdef Semctl
bd89102f
AD
2087 union semun unsemds;
2088
e6f0bdd6
GS
2089#ifdef EXTRA_F_IN_SEMUN_BUF
2090 unsemds.buff = (struct semid_ds *)a;
2091#else
bd89102f 2092 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2093#endif
bd89102f 2094 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2095#else
cea2e8a9 2096 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2097#endif
bd89102f 2098 }
c2ab57d4 2099 break;
e5d73d77 2100#endif
fe14fcc3 2101#ifdef HAS_SHM
79072805 2102 case OP_SHMCTL:
bee1dbe2 2103 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2104 break;
e5d73d77 2105#endif
c2ab57d4
LW
2106 }
2107 if (getinfo && ret >= 0) {
79072805
LW
2108 SvCUR_set(astr, infosize);
2109 *SvEND(astr) = '\0';
a0d0e21e 2110 SvSETMAGIC(astr);
c2ab57d4
LW
2111 }
2112 return ret;
2113}
2114
79072805 2115I32
864dbfa3 2116Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2117{
97aff369 2118 dVAR;
fe14fcc3 2119#ifdef HAS_MSG
463ee0b2 2120 STRLEN len;
6867be6d 2121 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2122 SV * const mstr = *++mark;
2123 const I32 flags = SvIVx(*++mark);
2124 const char * const mbuf = SvPV_const(mstr, len);
2125 const I32 msize = len - sizeof(long);
2126
890ce7af 2127 PERL_UNUSED_ARG(sp);
c2ab57d4 2128
0bcc34c2 2129 if (msize < 0)
cea2e8a9 2130 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2131 SETERRNO(0,0);
bee1dbe2 2132 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2133#else
cea2e8a9 2134 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2135#endif
c2ab57d4
LW
2136}
2137
79072805 2138I32
864dbfa3 2139Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2140{
fe14fcc3 2141#ifdef HAS_MSG
97aff369 2142 dVAR;
c2ab57d4
LW
2143 char *mbuf;
2144 long mtype;
6867be6d 2145 I32 msize, flags, ret;
6867be6d 2146 const I32 id = SvIVx(*++mark);
0bcc34c2 2147 SV * const mstr = *++mark;
890ce7af 2148 PERL_UNUSED_ARG(sp);
79072805 2149
c2e66d9e
GS
2150 /* suppress warning when reading into undef var --jhi */
2151 if (! SvOK(mstr))
2152 sv_setpvn(mstr, "", 0);
463ee0b2
LW
2153 msize = SvIVx(*++mark);
2154 mtype = (long)SvIVx(*++mark);
2155 flags = SvIVx(*++mark);
93524f2b 2156 SvPV_force_nolen(mstr);
a0d0e21e 2157 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2158
748a9306 2159 SETERRNO(0,0);
bee1dbe2 2160 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2161 if (ret >= 0) {
79072805
LW
2162 SvCUR_set(mstr, sizeof(long)+ret);
2163 *SvEND(mstr) = '\0';
41d6edb2
JH
2164#ifndef INCOMPLETE_TAINTS
2165 /* who knows who has been playing with this message? */
2166 SvTAINTED_on(mstr);
2167#endif
c2ab57d4
LW
2168 }
2169 return ret;
e5d73d77 2170#else
cea2e8a9 2171 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2172#endif
c2ab57d4
LW
2173}
2174
79072805 2175I32
864dbfa3 2176Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2177{
fe14fcc3 2178#ifdef HAS_SEM
97aff369 2179 dVAR;
463ee0b2 2180 STRLEN opsize;
6867be6d 2181 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2182 SV * const opstr = *++mark;
2183 const char * const opbuf = SvPV_const(opstr, opsize);
890ce7af 2184 PERL_UNUSED_ARG(sp);
c2ab57d4 2185
248ff010
NC
2186 if (opsize < 3 * SHORTSIZE
2187 || (opsize % (3 * SHORTSIZE))) {
93189314 2188 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2189 return -1;
2190 }
748a9306 2191 SETERRNO(0,0);
248ff010
NC
2192 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2193 {
6867be6d 2194 const int nsops = opsize / (3 * sizeof (short));
248ff010 2195 int i = nsops;
0bcc34c2 2196 short * const ops = (short *) opbuf;
248ff010
NC
2197 short *o = ops;
2198 struct sembuf *temps, *t;
2199 I32 result;
2200
a02a5408 2201 Newx (temps, nsops, struct sembuf);
248ff010
NC
2202 t = temps;
2203 while (i--) {
2204 t->sem_num = *o++;
2205 t->sem_op = *o++;
2206 t->sem_flg = *o++;
2207 t++;
2208 }
2209 result = semop(id, temps, nsops);
2210 t = temps;
2211 o = ops;
2212 i = nsops;
2213 while (i--) {
2214 *o++ = t->sem_num;
2215 *o++ = t->sem_op;
2216 *o++ = t->sem_flg;
2217 t++;
2218 }
2219 Safefree(temps);
2220 return result;
2221 }
e5d73d77 2222#else
cea2e8a9 2223 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2224#endif
c2ab57d4
LW
2225}
2226
79072805 2227I32
864dbfa3 2228Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2229{
fe14fcc3 2230#ifdef HAS_SHM
97aff369 2231 dVAR;
4373e329 2232 char *shm;
c2ab57d4 2233 struct shmid_ds shmds;
6867be6d 2234 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2235 SV * const mstr = *++mark;
2236 const I32 mpos = SvIVx(*++mark);
2237 const I32 msize = SvIVx(*++mark);
890ce7af 2238 PERL_UNUSED_ARG(sp);
c2ab57d4 2239
748a9306 2240 SETERRNO(0,0);
c2ab57d4
LW
2241 if (shmctl(id, IPC_STAT, &shmds) == -1)
2242 return -1;
7f39519f
NC
2243 if (mpos < 0 || msize < 0
2244 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
93189314 2245 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2246 return -1;
2247 }
d4c19fe8 2248 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2249 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2250 return -1;
79072805 2251 if (optype == OP_SHMREAD) {
c8ae91a8 2252 char *mbuf;
9f538c04
GS
2253 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2254 if (! SvOK(mstr))
2255 sv_setpvn(mstr, "", 0);
93524f2b 2256 SvPV_force_nolen(mstr);
bb7a0f54 2257 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2258
bee1dbe2 2259 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2260 SvCUR_set(mstr, msize);
2261 *SvEND(mstr) = '\0';
a0d0e21e 2262 SvSETMAGIC(mstr);
d929ce6f
JH
2263#ifndef INCOMPLETE_TAINTS
2264 /* who knows who has been playing with this shared memory? */
2265 SvTAINTED_on(mstr);
2266#endif
c2ab57d4
LW
2267 }
2268 else {
93524f2b 2269 STRLEN len;
c2ab57d4 2270
93524f2b 2271 const char *mbuf = SvPV_const(mstr, len);
027aa12d 2272 const I32 n = ((I32)len > msize) ? msize : (I32)len;
bee1dbe2 2273 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2274 if (n < msize)
bee1dbe2 2275 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2276 }
2277 return shmdt(shm);
e5d73d77 2278#else
cea2e8a9 2279 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2280#endif
c2ab57d4
LW
2281}
2282
fe14fcc3 2283#endif /* SYSV IPC */
4e35701f 2284
0d44d22b 2285/*
ccfc67b7
JH
2286=head1 IO Functions
2287
0d44d22b
NC
2288=for apidoc start_glob
2289
2290Function called by C<do_readline> to spawn a glob (or do the glob inside
2291perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2292this glob starter is only used by miniperl during the build process.
0d44d22b 2293Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2294
0d44d22b
NC
2295=cut
2296*/
2297
2298PerlIO *
2299Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2300{
27da23d5 2301 dVAR;
561b68a9 2302 SV * const tmpcmd = newSV(0);
0d44d22b
NC
2303 PerlIO *fp;
2304 ENTER;
2305 SAVEFREESV(tmpcmd);
2306#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2307 /* since spawning off a process is a real performance hit */
dca5a913
JM
2308
2309PerlIO *
2310Perl_vms_start_glob
2311 (pTHX_ SV *tmpglob,
2312 IO *io);
2313
49a7a762 2314 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2315
0d44d22b
NC
2316#else /* !VMS */
2317#ifdef MACOS_TRADITIONAL
2318 sv_setpv(tmpcmd, "glob ");
2319 sv_catsv(tmpcmd, tmpglob);
2320 sv_catpv(tmpcmd, " |");
2321#else
2322#ifdef DOSISH
2323#ifdef OS2
2324 sv_setpv(tmpcmd, "for a in ");
2325 sv_catsv(tmpcmd, tmpglob);
2326 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2327#else
2328#ifdef DJGPP
2329 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2330 sv_catsv(tmpcmd, tmpglob);
2331#else
2332 sv_setpv(tmpcmd, "perlglob ");
2333 sv_catsv(tmpcmd, tmpglob);
2334 sv_catpv(tmpcmd, " |");
2335#endif /* !DJGPP */
2336#endif /* !OS2 */
2337#else /* !DOSISH */
2338#if defined(CSH)
2339 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2340 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2341 sv_catsv(tmpcmd, tmpglob);
2342 sv_catpv(tmpcmd, "' 2>/dev/null |");
2343#else
2344 sv_setpv(tmpcmd, "echo ");
2345 sv_catsv(tmpcmd, tmpglob);
2346#if 'z' - 'a' == 25
2347 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2348#else
2349 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2350#endif
2351#endif /* !CSH */
2352#endif /* !DOSISH */
2353#endif /* MACOS_TRADITIONAL */
93524f2b 2354 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
4608196e 2355 FALSE, O_RDONLY, 0, NULL);
0d44d22b
NC
2356 fp = IoIFP(io);
2357#endif /* !VMS */
2358 LEAVE;
2359 return fp;
2360}
66610fdd
RGS
2361
2362/*
2363 * Local variables:
2364 * c-indentation-style: bsd
2365 * c-basic-offset: 4
2366 * indent-tabs-mode: t
2367 * End:
2368 *
37442d52
RGS
2369 * ex: set ts=8 sts=4 sw=4 noet:
2370 */