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fix type mismatch warning caused by return statement lurking in DIE macro
[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
b94e2f88 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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
SP
261#ifdef HAS_STRLCAT
262 if (out_raw)
e9ed3d63 263 strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 264 else if (out_crlf)
e9ed3d63 265 strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 266#else
a1d180c4
NIS
267 if (out_raw)
268 strcat(mode, "b");
269 else if (out_crlf)
270 strcat(mode, "t");
0c19750d 271#endif
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
SP
299#ifdef HAS_STRLCAT
300 if (out_raw)
e9ed3d63 301 strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 302 else if (out_crlf)
e9ed3d63 303 strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 304#else
16fe6d59
GS
305 if (out_raw)
306 strcat(mode, "b");
307 else if (out_crlf)
308 strcat(mode, "t");
0c19750d 309#endif
6170680b 310 if (*type == '&') {
c07a80fd 311 duplicity:
ecdeb87c 312 dodup = PERLIO_DUP_FD;
e620cd72
NIS
313 type++;
314 if (*type == '=') {
c07a80fd 315 dodup = 0;
e620cd72 316 type++;
4a7d1889 317 }
ee518936 318 if (!num_svs && !*type && supplied_fp) {
4a7d1889 319 /* "<+&" etc. is used by typemaps */
c07a80fd 320 fp = supplied_fp;
ee518936 321 }
a0d0e21e 322 else {
35da51f7 323 PerlIO *that_fp = NULL;
e620cd72
NIS
324 if (num_svs > 1) {
325 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
326 }
294b3b39
AL
327 while (isSPACE(*type))
328 type++;
1771866f 329 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 330 fd = SvUV(*svp);
24a7a40d 331 num_svs = 0;
ee518936 332 }
e620cd72 333 else if (isDIGIT(*type)) {
e620cd72
NIS
334 fd = atoi(type);
335 }
c07a80fd 336 else {
e1ec3a88 337 const IO* thatio;
e620cd72
NIS
338 if (num_svs) {
339 thatio = sv_2io(*svp);
340 }
341 else {
35da51f7 342 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
90e5519e 343 0, SVt_PVIO);
e620cd72
NIS
344 thatio = GvIO(thatgv);
345 }
c07a80fd 346 if (!thatio) {
6e21c824 347#ifdef EINVAL
93189314 348 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 349#endif
c07a80fd
PP
350 goto say_false;
351 }
f4e789af 352 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
353 /* Flush stdio buffer before dup. --mjd
354 * Unfortunately SEEK_CURing 0 seems to
355 * be optimized away on most platforms;
356 * only Solaris and Linux seem to flush
357 * on that. --jhi */
2c534a3f
NC
358#ifdef USE_SFIO
359 /* sfio fails to clear error on next
360 sfwrite, contrary to documentation.
04d26ece 361 -- Nicholas Clark */
ecdeb87c
NIS
362 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
363 PerlIO_clearerr(that_fp);
2c534a3f 364#endif
7211d486
JH
365 /* On the other hand, do all platforms
366 * take gracefully to flushing a read-only
367 * filehandle? Perhaps we should do
368 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
369 PerlIO_flush(that_fp);
370 fd = PerlIO_fileno(that_fp);
0759c907
JH
371 /* When dup()ing STDIN, STDOUT or STDERR
372 * explicitly set appropriate access mode */
f4e789af
NC
373 if (that_fp == PerlIO_stdout()
374 || that_fp == PerlIO_stderr())
0759c907 375 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 376 else if (that_fp == PerlIO_stdin())
0759c907
JH
377 IoTYPE(io) = IoTYPE_RDONLY;
378 /* When dup()ing a socket, say result is
379 * one as well */
380 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 381 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
382 }
383 else
384 fd = -1;
a0d0e21e 385 }
ee518936 386 if (!num_svs)
bd61b366 387 type = NULL;
ecdeb87c
NIS
388 if (that_fp) {
389 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
390 }
391 else {
c07a80fd 392 if (dodup)
ecdeb87c
NIS
393 fd = PerlLIO_dup(fd);
394 else
395 was_fdopen = TRUE;
396 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 397 if (dodup && fd >= 0)
ecdeb87c
NIS
398 PerlLIO_close(fd);
399 }
faecd977 400 }
c07a80fd 401 }
ee518936 402 } /* & */
c07a80fd 403 else {
294b3b39
AL
404 while (isSPACE(*type))
405 type++;
b931b1d9 406 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 407 type++;
760ac839 408 fp = PerlIO_stdout();
50952442 409 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
410 if (num_svs > 1) {
411 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
412 }
c07a80fd
PP
413 }
414 else {
ee518936 415 if (!num_svs) {
2b2a7552 416 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
417 num_svs = 1;
418 svp = &namesv;
bd61b366 419 type = NULL;
ee518936 420 }
6e60e805 421 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 422 }
ee518936 423 } /* !& */
7e72d509
JH
424 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
425 goto unknown_open_mode;
c2be40b1 426 } /* IoTYPE_WRONLY */
9f37169a 427 else if (*type == IoTYPE_RDONLY) {
294b3b39
AL
428 do {
429 type++;
430 } while (isSPACE(*type));
bf38876a 431 mode[0] = 'r';
0c19750d
SP
432#ifdef HAS_STRLCAT
433 if (in_raw)
e9ed3d63 434 strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 435 else if (in_crlf)
e9ed3d63 436 strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 437#else
16fe6d59
GS
438 if (in_raw)
439 strcat(mode, "b");
440 else if (in_crlf)
441 strcat(mode, "t");
0c19750d 442#endif
6170680b 443 if (*type == '&') {
bf38876a 444 goto duplicity;
6170680b 445 }
b931b1d9 446 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 447 type++;
760ac839 448 fp = PerlIO_stdin();
50952442 449 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
450 if (num_svs > 1) {
451 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
452 }
a687059c 453 }
ee518936
NIS
454 else {
455 if (!num_svs) {
2b2a7552 456 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
457 num_svs = 1;
458 svp = &namesv;
bd61b366 459 type = NULL;
ee518936 460 }
6e60e805 461 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 462 }
7e72d509
JH
463 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
464 goto unknown_open_mode;
c2be40b1
JH
465 } /* IoTYPE_RDONLY */
466 else if ((num_svs && /* '-|...' or '...|' */
467 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 468 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 469 if (num_svs) {
b931b1d9 470 type += 2; /* skip over '-|' */
6170680b
IZ
471 }
472 else {
b931b1d9
NIS
473 *--tend = '\0';
474 while (tend > type && isSPACE(tend[-1]))
475 *--tend = '\0';
a6e20a40
AL
476 for (; isSPACE(*type); type++)
477 ;
6170680b 478 name = type;
b931b1d9 479 len = tend-type;
6170680b 480 }
4a7d1889
NIS
481 if (*name == '\0') {
482 /* command is missing 19990114 */
06eaf0bc 483 if (ckWARN(WARN_PIPE))
9014280d 484 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
485 errno = EPIPE;
486 goto say_false;
487 }
770526c1 488 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
489 TAINT_ENV();
490 TAINT_PROPER("piped open");
a1d180c4 491 mode[0] = 'r';
0c19750d
SP
492
493#ifdef HAS_STRLCAT
494 if (in_raw)
e9ed3d63 495 strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 496 else if (in_crlf)
e9ed3d63 497 strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 498#else
a1d180c4
NIS
499 if (in_raw)
500 strcat(mode, "b");
501 else if (in_crlf)
502 strcat(mode, "t");
0c19750d
SP
503#endif
504
4a7d1889
NIS
505 if (num_svs > 1) {
506 fp = PerlProc_popen_list(mode,num_svs,svp);
507 }
e620cd72 508 else {
4a7d1889
NIS
509 fp = PerlProc_popen(name,mode);
510 }
50952442 511 IoTYPE(io) = IoTYPE_PIPE;
1771866f 512 if (num_svs) {
294b3b39
AL
513 while (isSPACE(*type))
514 type++;
1771866f
NIS
515 if (*type) {
516 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
517 goto say_false;
518 }
519 }
520 }
a687059c 521 }
c2be40b1 522 else { /* layer(Args) */
6170680b 523 if (num_svs)
c2be40b1 524 goto unknown_open_mode;
6170680b 525 name = type;
50952442 526 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
527 for (; isSPACE(*name); name++)
528 ;
88b61e10 529 mode[0] = 'r';
0c19750d
SP
530
531#ifdef HAS_STRLCAT
532 if (in_raw)
e9ed3d63 533 strlcat(mode, "b", PERL_MODE_MAX - 1);
0c19750d 534 else if (in_crlf)
e9ed3d63 535 strlcat(mode, "t", PERL_MODE_MAX - 1);
0c19750d 536#else
88b61e10
NIS
537 if (in_raw)
538 strcat(mode, "b");
539 else if (in_crlf)
540 strcat(mode, "t");
0c19750d
SP
541#endif
542
770526c1 543 if (*name == '-' && name[1] == '\0') {
760ac839 544 fp = PerlIO_stdin();
50952442 545 IoTYPE(io) = IoTYPE_STD;
a687059c 546 }
16fe6d59 547 else {
ee518936 548 if (!num_svs) {
2b2a7552 549 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
550 num_svs = 1;
551 svp = &namesv;
bd61b366 552 type = NULL;
ee518936 553 }
6e60e805 554 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 555 }
a687059c
LW
556 }
557 }
bee1dbe2 558 if (!fp) {
ce44635a 559 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 560 && strchr(oname, '\n')
ce44635a 561
041457d9 562 )
9014280d 563 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 564 goto say_false;
bee1dbe2 565 }
a00b5bd3
NIS
566
567 if (ckWARN(WARN_IO)) {
568 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
569 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 570 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
571 "Filehandle STD%s reopened as %s only for input",
572 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
573 GvENAME(gv));
a00b5bd3 574 }
ee518936 575 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 576 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
577 "Filehandle STDIN reopened as %s only for output",
578 GvENAME(gv));
a00b5bd3
NIS
579 }
580 }
581
e99cca91 582 fd = PerlIO_fileno(fp);
e934609f
JH
583 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
584 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
585 * type probe for socket-ness.
586 */
587 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
588 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
589 /* If PerlIO claims to have fd we had better be able to fstat() it. */
590 (void) PerlIO_close(fp);
6e21c824 591 goto say_false;
a687059c 592 }
7114a2d2 593#ifndef PERL_MICRO
3280af22 594 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 595 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
596#ifdef HAS_SOCKET
597 else if (
c623bd54 598#ifdef S_IFMT
3280af22 599 !(PL_statbuf.st_mode & S_IFMT)
99b89507 600#else
b28d0864 601 !PL_statbuf.st_mode
99b89507 602#endif
0759c907
JH
603 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
604 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
605 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
606 char tmpbuf[256];
607 Sock_size_t buflen = sizeof tmpbuf;
608 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
609 || errno != ENOTSOCK)
610 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
611 /* but some return 0 for streams too, sigh */
99b89507 612 }
e99cca91 613#endif /* HAS_SOCKET */
7114a2d2 614#endif /* !PERL_MICRO */
a687059c 615 }
e99cca91
NIS
616
617 /* Eeek - FIXME !!!
618 * If this is a standard handle we discard all the layer stuff
619 * and just dup the fd into whatever was on the handle before !
620 */
621
6e21c824 622 if (saveifp) { /* must use old fp? */
f5b9d040 623 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 624 then dup the new fileno down
f5b9d040 625 */
6e21c824 626 if (saveofp) {
f5b9d040 627 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 628 if (saveofp != saveifp) { /* was a socket? */
760ac839 629 PerlIO_close(saveofp);
6e21c824
LW
630 }
631 }
6e60e805 632 if (savefd != fd) {
e934609f 633 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
634 is assigned to (say) STDOUT - for now let dup2() fail
635 and provide the error
636 */
bd4a5668
NIS
637 if (PerlLIO_dup2(fd, savefd) < 0) {
638 (void)PerlIO_close(fp);
639 goto say_false;
640 }
d082dcd6 641#ifdef VMS
6e60e805 642 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
643 char newname[FILENAME_MAX+1];
644 if (PerlIO_getname(fp, newname)) {
645 if (fd == PerlIO_fileno(PerlIO_stdout()))
646 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
647 if (fd == PerlIO_fileno(PerlIO_stderr()))
648 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
649 }
d082dcd6
JH
650 }
651#endif
d0e2cf63
AMS
652
653#if !defined(WIN32)
654 /* PL_fdpid isn't used on Windows, so avoid this useless work.
655 * XXX Probably the same for a lot of other places. */
656 {
657 Pid_t pid;
658 SV *sv;
659
660 LOCK_FDPID_MUTEX;
661 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 662 SvUPGRADE(sv, SVt_IV);
d0e2cf63 663 pid = SvIVX(sv);
45977657 664 SvIV_set(sv, 0);
d0e2cf63 665 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 666 SvUPGRADE(sv, SVt_IV);
45977657 667 SvIV_set(sv, pid);
d0e2cf63
AMS
668 UNLOCK_FDPID_MUTEX;
669 }
670#endif
671
e212fc47
AMS
672 if (was_fdopen) {
673 /* need to close fp without closing underlying fd */
674 int ofd = PerlIO_fileno(fp);
675 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
676#if defined(HAS_FCNTL) && defined(F_SETFD)
677 /* Assume if we have F_SETFD we have F_GETFD */
678 int coe = fcntl(ofd,F_GETFD);
679#endif
e212fc47
AMS
680 PerlIO_close(fp);
681 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
682#if defined(HAS_FCNTL) && defined(F_SETFD)
683 /* The dup trick has lost close-on-exec on ofd */
684 fcntl(ofd,F_SETFD, coe);
685#endif
e212fc47 686 PerlLIO_close(dupfd);
ecdeb87c 687 }
e212fc47
AMS
688 else
689 PerlIO_close(fp);
6e21c824
LW
690 }
691 fp = saveifp;
760ac839 692 PerlIO_clearerr(fp);
e99cca91 693 fd = PerlIO_fileno(fp);
6e21c824 694 }
a0d0e21e 695#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 696 if (fd >= 0) {
0bcc34c2 697 const int save_errno = errno;
a8710ca1
GS
698 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
699 errno = save_errno;
700 }
1462b684 701#endif
8990e307 702 IoIFP(io) = fp;
b931b1d9 703
684bef36 704 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 705 if (writing) {
50952442 706 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 707 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 708 char *s = mode;
3b6c1aba
JH
709 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
710 s++;
a33cf58c 711 *s = 'w';
1feb1812 712 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 713 PerlIO_close(fp);
4608196e 714 IoIFP(io) = NULL;
6e21c824 715 goto say_false;
fe14fcc3 716 }
1462b684
LW
717 }
718 else
8990e307 719 IoOFP(io) = fp;
bf38876a 720 }
a687059c 721 return TRUE;
6e21c824
LW
722
723say_false:
8990e307
LW
724 IoIFP(io) = saveifp;
725 IoOFP(io) = saveofp;
726 IoTYPE(io) = savetype;
6e21c824 727 return FALSE;
a687059c
LW
728}
729
760ac839 730PerlIO *
864dbfa3 731Perl_nextargv(pTHX_ register GV *gv)
a687059c 732{
97aff369 733 dVAR;
79072805 734 register SV *sv;
99b89507 735#ifndef FLEXFILENAMES
c623bd54
LW
736 int filedev;
737 int fileino;
99b89507 738#endif
761237fe
JB
739 Uid_t fileuid;
740 Gid_t filegid;
2d03de9c 741 IO * const io = GvIOp(gv);
fe14fcc3 742
3280af22 743 if (!PL_argvoutgv)
fafc274c 744 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
18708f5a
GS
745 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
746 IoFLAGS(io) &= ~IOf_START;
7a1c5554
GS
747 if (PL_inplace) {
748 if (!PL_argvout_stack)
749 PL_argvout_stack = newAV();
294b3b39
AL
750 assert(PL_defoutgv);
751 av_push(PL_argvout_stack, SvREFCNT_inc_simple_NN(PL_defoutgv));
7a1c5554 752 }
18708f5a 753 }
3280af22
NIS
754 if (PL_filemode & (S_ISUID|S_ISGID)) {
755 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 756#ifdef HAS_FCHMOD
c797f2d8
DM
757 if (PL_lastfd != -1)
758 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 759#else
b28d0864 760 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
761#endif
762 }
c797f2d8 763 PL_lastfd = -1;
3280af22 764 PL_filemode = 0;
5c501b37 765 if (!GvAV(gv))
4608196e 766 return NULL;
79072805 767 while (av_len(GvAV(gv)) >= 0) {
85aff577 768 STRLEN oldlen;
79072805 769 sv = av_shift(GvAV(gv));
8990e307 770 SAVEFREESV(sv);
e203899d 771 sv_setsv(GvSVn(gv),sv);
79072805 772 SvSETMAGIC(GvSV(gv));
3280af22 773 PL_oldname = SvPVx(GvSV(gv), oldlen);
4608196e 774 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
3280af22 775 if (PL_inplace) {
79072805 776 TAINT_PROPER("inplace open");
3280af22 777 if (oldlen == 1 && *PL_oldname == '-') {
fafc274c
NC
778 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
779 SVt_PVIO));
a0d0e21e 780 return IoIFP(GvIOp(gv));
c623bd54 781 }
99b89507 782#ifndef FLEXFILENAMES
b28d0864
NIS
783 filedev = PL_statbuf.st_dev;
784 fileino = PL_statbuf.st_ino;
99b89507 785#endif
3280af22
NIS
786 PL_filemode = PL_statbuf.st_mode;
787 fileuid = PL_statbuf.st_uid;
788 filegid = PL_statbuf.st_gid;
789 if (!S_ISREG(PL_filemode)) {
0453d815 790 if (ckWARN_d(WARN_INPLACE))
9014280d 791 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
792 "Can't do inplace edit: %s is not a regular file",
793 PL_oldname );
79072805 794 do_close(gv,FALSE);
c623bd54
LW
795 continue;
796 }
3280af22 797 if (*PL_inplace) {
2d03de9c 798 const char *star = strchr(PL_inplace, '*');
2d259d92 799 if (star) {
2d03de9c 800 const char *begin = PL_inplace;
2d259d92
CK
801 sv_setpvn(sv, "", 0);
802 do {
803 sv_catpvn(sv, begin, star - begin);
3280af22 804 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
805 begin = ++star;
806 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
807 if (*begin)
808 sv_catpv(sv,begin);
2d259d92
CK
809 }
810 else {
3280af22 811 sv_catpv(sv,PL_inplace);
2d259d92 812 }
c623bd54 813#ifndef FLEXFILENAMES
95a20fc0 814 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
815 && PL_statbuf.st_dev == filedev
816 && PL_statbuf.st_ino == fileino)
39e571d4 817#ifdef DJGPP
5f74f29c 818 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 819#endif
f248d071
GS
820 )
821 {
822 if (ckWARN_d(WARN_INPLACE))
9014280d 823 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
824 "Can't do inplace edit: %"SVf" would not be unique",
825 sv);
79072805 826 do_close(gv,FALSE);
c623bd54
LW
827 continue;
828 }
829#endif
fe14fcc3 830#ifdef HAS_RENAME
2585f9a3 831#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 832 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 833 if (ckWARN_d(WARN_INPLACE))
9014280d 834 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d 835 "Can't rename %s to %"SVf": %s, skipping file",
95b63a38 836 PL_oldname, (void*)sv, Strerror(errno));
79072805 837 do_close(gv,FALSE);
c623bd54
LW
838 continue;
839 }
a687059c 840#else
79072805 841 do_close(gv,FALSE);
95a20fc0
SP
842 (void)PerlLIO_unlink(SvPVX_const(sv));
843 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
93524f2b 844 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
4608196e 845 O_RDONLY,0,NULL);
55497cff 846#endif /* DOSISH */
ff8e2863 847#else
95a20fc0
SP
848 (void)UNLINK(SvPVX_const(sv));
849 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 850 if (ckWARN_d(WARN_INPLACE))
9014280d 851 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
852 "Can't rename %s to %"SVf": %s, skipping file",
853 PL_oldname, sv, Strerror(errno) );
79072805 854 do_close(gv,FALSE);
c623bd54
LW
855 continue;
856 }
b28d0864 857 (void)UNLINK(PL_oldname);
a687059c
LW
858#endif
859 }
860 else {
c030f24b 861#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 862# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 863 if (UNLINK(PL_oldname) < 0) {
0453d815 864 if (ckWARN_d(WARN_INPLACE))
9014280d 865 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
866 "Can't remove %s: %s, skipping file",
867 PL_oldname, Strerror(errno) );
79072805 868 do_close(gv,FALSE);
fe14fcc3
LW
869 continue;
870 }
edc7bc49 871# endif
ff8e2863 872#else
cea2e8a9 873 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 874#endif
a687059c
LW
875 }
876
3280af22
NIS
877 sv_setpvn(sv,">",!PL_inplace);
878 sv_catpvn(sv,PL_oldname,oldlen);
748a9306 879 SETERRNO(0,0); /* in case sprintf set errno */
4119ab01 880#ifdef VMS
93524f2b 881 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
4608196e 882 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,NULL))
4119ab01 883#else
93524f2b
NC
884 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
885 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
4608196e 886 NULL))
4119ab01 887#endif
18708f5a 888 {
0453d815 889 if (ckWARN_d(WARN_INPLACE))
9014280d 890 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
0453d815 891 PL_oldname, Strerror(errno) );
79072805 892 do_close(gv,FALSE);
fe14fcc3
LW
893 continue;
894 }
3280af22
NIS
895 setdefout(PL_argvoutgv);
896 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
897 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 898#ifdef HAS_FCHMOD
3280af22 899 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 900#else
3e3baf6d
TB
901# if !(defined(WIN32) && defined(__BORLANDC__))
902 /* Borland runtime creates a readonly file! */
b28d0864 903 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 904# endif
a687059c 905#endif
3280af22 906 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 907#ifdef HAS_FCHOWN
3280af22 908 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 909#else
fe14fcc3 910#ifdef HAS_CHOWN
b28d0864 911 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 912#endif
b1248f16 913#endif
fe14fcc3 914 }
a687059c 915 }
a0d0e21e 916 return IoIFP(GvIOp(gv));
a687059c 917 }
4d61ec05 918 else {
4d61ec05 919 if (ckWARN_d(WARN_INPLACE)) {
4373e329 920 const int eno = errno;
6af84f9f
GS
921 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
922 && !S_ISREG(PL_statbuf.st_mode))
923 {
9014280d 924 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
4d61ec05 925 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 926 PL_oldname);
6af84f9f 927 }
4d61ec05 928 else
9014280d 929 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
6af84f9f 930 PL_oldname, Strerror(eno));
4d61ec05
GS
931 }
932 }
a687059c 933 }
18708f5a
GS
934 if (io && (IoFLAGS(io) & IOf_ARGV))
935 IoFLAGS(io) |= IOf_START;
3280af22
NIS
936 if (PL_inplace) {
937 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
938 if (io && (IoFLAGS(io) & IOf_ARGV)
939 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
940 {
35da51f7 941 GV * const oldout = (GV*)av_pop(PL_argvout_stack);
18708f5a
GS
942 setdefout(oldout);
943 SvREFCNT_dec(oldout);
4608196e 944 return NULL;
18708f5a 945 }
fafc274c 946 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
a687059c 947 }
4608196e 948 return NULL;
a687059c
LW
949}
950
517844ec 951/* explicit renamed to avoid C++ conflict -- kja */
a687059c 952bool
864dbfa3 953Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 954{
97aff369 955 dVAR;
1193dd27
IZ
956 bool retval;
957 IO *io;
a687059c 958
79072805 959 if (!gv)
3280af22 960 gv = PL_argvgv;
a0d0e21e 961 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1d2dff63 962 if (not_implicit)
93189314 963 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 964 return FALSE;
99b89507 965 }
79072805
LW
966 io = GvIO(gv);
967 if (!io) { /* never opened */
1d2dff63 968 if (not_implicit) {
2dd78f96
JH
969 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
970 report_evil_fh(gv, io, PL_op->op_type);
93189314 971 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 972 }
a687059c
LW
973 return FALSE;
974 }
f2b5be74 975 retval = io_close(io, not_implicit);
517844ec 976 if (not_implicit) {
1193dd27
IZ
977 IoLINES(io) = 0;
978 IoPAGE(io) = 0;
979 IoLINES_LEFT(io) = IoPAGE_LEN(io);
980 }
50952442 981 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
982 return retval;
983}
984
985bool
f2b5be74 986Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27 987{
97aff369 988 dVAR;
1193dd27 989 bool retval = FALSE;
1193dd27 990
8990e307 991 if (IoIFP(io)) {
50952442 992 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 993 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 994 if (not_implicit) {
37038d91 995 STATUS_NATIVE_CHILD_SET(status);
e5218da5 996 retval = (STATUS_UNIX == 0);
f2b5be74
GS
997 }
998 else {
999 retval = (status != -1);
1000 }
a687059c 1001 }
50952442 1002 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
1003 retval = TRUE;
1004 else {
8990e307 1005 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 1006 const bool prev_err = PerlIO_error(IoOFP(io));
e199e3be 1007 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 1008 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 1009 }
e199e3be 1010 else {
0bcc34c2 1011 const bool prev_err = PerlIO_error(IoIFP(io));
e199e3be
RGS
1012 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1013 }
a687059c 1014 }
4608196e 1015 IoOFP(io) = IoIFP(io) = NULL;
79072805 1016 }
f2b5be74 1017 else if (not_implicit) {
93189314 1018 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 1019 }
1193dd27 1020
a687059c
LW
1021 return retval;
1022}
1023
1024bool
864dbfa3 1025Perl_do_eof(pTHX_ GV *gv)
a687059c 1026{
97aff369 1027 dVAR;
0bcc34c2 1028 register IO * const io = GvIO(gv);
a687059c 1029
79072805 1030 if (!io)
a687059c 1031 return TRUE;
041457d9 1032 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
06bcfee8 1033 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
a687059c 1034
8990e307 1035 while (IoIFP(io)) {
760ac839 1036 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1037 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1038 return FALSE; /* this is the most usual case */
1039 }
a687059c 1040
79852593
NC
1041 {
1042 /* getc and ungetc can stomp on errno */
1043 const int saverrno = errno;
1044 const int ch = PerlIO_getc(IoIFP(io));
1045 if (ch != EOF) {
1046 (void)PerlIO_ungetc(IoIFP(io),ch);
1047 errno = saverrno;
1048 return FALSE;
1049 }
505fdf5d 1050 errno = saverrno;
a687059c 1051 }
fab3f3a7 1052
760ac839 1053 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1054 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1055 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1056 }
533c011a 1057 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1058 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1059 return TRUE;
1060 }
1061 else
1062 return TRUE; /* normal fp, definitely end of file */
1063 }
1064 return TRUE;
1065}
1066
5ff3f7a4 1067Off_t
864dbfa3 1068Perl_do_tell(pTHX_ GV *gv)
a687059c 1069{
97aff369 1070 dVAR;
cbbf8932 1071 register IO *io = NULL;
96e4d5b1 1072 register PerlIO *fp;
a687059c 1073
96e4d5b1 1074 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1075#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1076 if (PerlIO_eof(fp))
1077 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1078#endif
8903cb82 1079 return PerlIO_tell(fp);
96e4d5b1 1080 }
411caa50
JH
1081 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1082 report_evil_fh(gv, io, PL_op->op_type);
93189314 1083 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1084 return (Off_t)-1;
a687059c
LW
1085}
1086
1087bool
864dbfa3 1088Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1089{
97aff369 1090 dVAR;
cbbf8932 1091 register IO *io = NULL;
137443ea 1092 register PerlIO *fp;
a687059c 1093
137443ea 1094 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1095#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1096 if (PerlIO_eof(fp))
1097 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1098#endif
8903cb82 1099 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1100 }
411caa50
JH
1101 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1102 report_evil_fh(gv, io, PL_op->op_type);
93189314 1103 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1104 return FALSE;
1105}
1106
97cc44eb 1107Off_t
864dbfa3 1108Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1109{
97aff369 1110 dVAR;
cbbf8932 1111 register IO *io = NULL;
8903cb82
PP
1112 register PerlIO *fp;
1113
1114 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
3028581b 1115 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
411caa50
JH
1116 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1117 report_evil_fh(gv, io, PL_op->op_type);
93189314 1118 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1119 return (Off_t)-1;
8903cb82
PP
1120}
1121
6ff81951 1122int
16fe6d59
GS
1123Perl_mode_from_discipline(pTHX_ SV *discp)
1124{
1125 int mode = O_BINARY;
1126 if (discp) {
1127 STRLEN len;
e62f0680 1128 const char *s = SvPV_const(discp,len);
16fe6d59
GS
1129 while (*s) {
1130 if (*s == ':') {
1131 switch (s[1]) {
1132 case 'r':
e963d6d2 1133 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1134 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1135 {
1136 mode = O_BINARY;
1137 s += 4;
1138 len -= 4;
1139 break;
1140 }
1141 /* FALL THROUGH */
1142 case 'c':
e963d6d2 1143 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1144 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1145 {
1146 mode = O_TEXT;
1147 s += 5;
1148 len -= 5;
1149 break;
1150 }
1151 /* FALL THROUGH */
1152 default:
1153 goto fail_discipline;
1154 }
1155 }
1156 else if (isSPACE(*s)) {
1157 ++s;
1158 --len;
1159 }
1160 else {
4373e329 1161 const char *end;
16fe6d59
GS
1162fail_discipline:
1163 end = strchr(s+1, ':');
1164 if (!end)
1165 end = s+len;
60382766 1166#ifndef PERLIO_LAYERS
363c40c4 1167 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1168#else
18a33fb5 1169 len -= end-s;
60382766
NIS
1170 s = end;
1171#endif
16fe6d59
GS
1172 }
1173 }
1174 }
1175 return mode;
1176}
1177
58e24eff 1178#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1179I32
1180my_chsize(int fd, Off_t length)
6eb13c3b 1181{
58e24eff
SH
1182#ifdef F_FREESP
1183 /* code courtesy of William Kucharski */
1184#define HAS_CHSIZE
1185
c623ac67 1186 Stat_t filebuf;
6eb13c3b 1187
3028581b 1188 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1189 return -1;
1190
1191 if (filebuf.st_size < length) {
1192
1193 /* extend file length */
1194
3028581b 1195 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1196 return -1;
1197
1198 /* write a "0" byte */
1199
3028581b 1200 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1201 return -1;
1202 }
1203 else {
1204 /* truncate length */
35da51f7 1205 struct flock fl;
6eb13c3b
LW
1206 fl.l_whence = 0;
1207 fl.l_len = 0;
1208 fl.l_start = length;
a0d0e21e 1209 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1210
1211 /*
a0d0e21e 1212 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1213 * fcntl(2), which truncates the file so that it ends at the
1214 * position indicated by fl.l_start.
1215 *
1216 * Will minor miracles never cease?
1217 */
1218
a0d0e21e 1219 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1220 return -1;
1221
1222 }
6eb13c3b 1223 return 0;
58e24eff 1224#else
27da23d5 1225 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1226#endif /* F_FREESP */
27da23d5 1227 return -1;
58e24eff
SH
1228}
1229#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1230
a687059c 1231bool
864dbfa3 1232Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1233{
97aff369 1234 dVAR;
e1ec3a88 1235 register const char *tmps;
463ee0b2 1236 STRLEN len;
676f44e7
NC
1237 U8 *tmpbuf = NULL;
1238 bool happy = TRUE;
a687059c 1239
79072805
LW
1240 /* assuming fp is checked earlier */
1241 if (!sv)
1242 return TRUE;
79072805
LW
1243 switch (SvTYPE(sv)) {
1244 case SVt_NULL:
411caa50 1245 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 1246 report_uninit(sv);
ff8e2863 1247 return TRUE;
79072805 1248 case SVt_IV:
a0d0e21e 1249 if (SvIOK(sv)) {
7ec92ad4 1250 assert(!SvGMAGICAL(sv));
cf2093f6 1251 if (SvIsUV(sv))
57def98f 1252 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
cf2093f6 1253 else
57def98f 1254 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
760ac839 1255 return !PerlIO_error(fp);
a0d0e21e
LW
1256 }
1257 /* FALL THROUGH */
79072805 1258 default:
676f44e7
NC
1259 /* Do this first to trigger any overloading. */
1260 tmps = SvPV_const(sv, len);
7d59b7e4 1261 if (PerlIO_isutf8(fp)) {
676f44e7
NC
1262 if (!SvUTF8(sv)) {
1263 /* We don't modify the original scalar. */
1264 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1265 tmps = (char *) tmpbuf;
1266 }
7d59b7e4 1267 }
ae798467 1268 else if (DO_UTF8(sv)) {
676f44e7
NC
1269 STRLEN tmplen = len;
1270 bool utf8 = TRUE;
35da51f7 1271 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
676f44e7
NC
1272 if (!utf8) {
1273 tmpbuf = result;
1274 tmps = (char *) tmpbuf;
1275 len = tmplen;
1276 }
1277 else {
1278 assert((char *)result == tmps);
1279 if (ckWARN_d(WARN_UTF8)) {
1280 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1281 "Wide character in print");
1282 }
ae798467
NIS
1283 }
1284 }
79072805 1285 break;
ff8e2863 1286 }
94e4c244
JH
1287 /* To detect whether the process is about to overstep its
1288 * filesize limit we would need getrlimit(). We could then
1289 * also transparently raise the limit with setrlimit() --
1290 * but only until the system hard limit/the filesystem limit,
c5dd3cdd
JH
1291 * at which we would get EPERM. Note that when using buffered
1292 * io the write failure can be delayed until the flush/close. --jhi */
a21ac455 1293 if (len && (PerlIO_write(fp,tmps,len) == 0))
676f44e7 1294 happy = FALSE;
35da51f7 1295 Safefree(tmpbuf);
676f44e7 1296 return happy ? !PerlIO_error(fp) : FALSE;
a687059c
LW
1297}
1298
79072805 1299I32
cea2e8a9 1300Perl_my_stat(pTHX)
a687059c 1301{
97aff369 1302 dVAR;
39644a26 1303 dSP;
79072805 1304 IO *io;
2dd78f96 1305 GV* gv;
79072805 1306
533c011a 1307 if (PL_op->op_flags & OPf_REF) {
924508f0 1308 EXTEND(SP,1);
2dd78f96 1309 gv = cGVOP_gv;
748a9306 1310 do_fstat:
5228a96c
SP
1311 if (gv == PL_defgv)
1312 return PL_laststatval;
2dd78f96 1313 io = GvIO(gv);
5228a96c
SP
1314 PL_laststype = OP_STAT;
1315 PL_statgv = gv;
1316 sv_setpvn(PL_statname, "", 0);
1317 if(io) {
1318 if (IoIFP(io)) {
1319 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1320 } else if (IoDIRP(io)) {
1321#ifdef HAS_DIRFD
1322 return (PL_laststatval = PerlLIO_fstat(dirfd(IoDIRP(io)), &PL_statcache));
1323#else
efdc3048 1324 Perl_die(aTHX_ PL_no_func, "dirfd");
5228a96c
SP
1325#endif
1326 } else {
1327 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1328 report_evil_fh(gv, io, PL_op->op_type);
1329 return (PL_laststatval = -1);
1330 }
1331 } else {
1332 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1333 report_evil_fh(gv, io, PL_op->op_type);
1334 return (PL_laststatval = -1);
1335 }
a687059c 1336 }
fbb0b3b3
RGS
1337 else if (PL_op->op_private & OPpFT_STACKED) {
1338 return PL_laststatval;
1339 }
a687059c 1340 else {
0bcc34c2 1341 SV* const sv = POPs;
4373e329 1342 const char *s;
4ecd490c 1343 STRLEN len;
79072805 1344 PUTBACK;
748a9306 1345 if (SvTYPE(sv) == SVt_PVGV) {
2dd78f96 1346 gv = (GV*)sv;
748a9306
LW
1347 goto do_fstat;
1348 }
1349 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
2dd78f96 1350 gv = (GV*)SvRV(sv);
748a9306
LW
1351 goto do_fstat;
1352 }
1353
5c144d81 1354 s = SvPV_const(sv, len);
a0714e2c 1355 PL_statgv = NULL;
4ecd490c 1356 sv_setpvn(PL_statname, s, len);
95a20fc0 1357 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
3280af22
NIS
1358 PL_laststype = OP_STAT;
1359 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
ce44635a 1360 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
9014280d 1361 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
3280af22 1362 return PL_laststatval;
a687059c
LW
1363 }
1364}
1365
fbb0b3b3 1366
79072805 1367I32
cea2e8a9 1368Perl_my_lstat(pTHX)
c623bd54 1369{
97aff369 1370 dVAR;
0bd48802 1371 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1372 dSP;
79072805 1373 SV *sv;
533c011a 1374 if (PL_op->op_flags & OPf_REF) {
924508f0 1375 EXTEND(SP,1);
638eceb6 1376 if (cGVOP_gv == PL_defgv) {
3280af22 1377 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1378 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1379 return PL_laststatval;
fe14fcc3 1380 }
5d3e98de 1381 if (ckWARN(WARN_IO)) {
9014280d 1382 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1383 GvENAME(cGVOP_gv));
1384 return (PL_laststatval = -1);
1385 }
fe14fcc3 1386 }
041457d9
DM
1387 else if (PL_laststype != OP_LSTAT
1388 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
fbb0b3b3 1389 Perl_croak(aTHX_ no_prev_lstat);
c623bd54 1390
3280af22 1391 PL_laststype = OP_LSTAT;
a0714e2c 1392 PL_statgv = NULL;
79072805
LW
1393 sv = POPs;
1394 PUTBACK;
5d3e98de 1395 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
9014280d 1396 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1397 GvENAME((GV*) SvRV(sv)));
1398 return (PL_laststatval = -1);
1399 }
4373e329 1400 /* XXX Do really need to be calling SvPV() all these times? */
e62f0680
NC
1401 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1402 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1403 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
9014280d 1404 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1405 return PL_laststatval;
c623bd54
LW
1406}
1407
a0f2c8ec
JD
1408static void
1409S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1410{
1411 const int e = errno;
1412 if (ckWARN(WARN_EXEC))
1413 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1414 cmd, Strerror(e));
1415 if (do_report) {
1416 PerlLIO_write(fd, (void*)&e, sizeof(int));
1417 PerlLIO_close(fd);
1418 }
1419}
1420
d5a9bfb0 1421bool
2aa1486d
GS
1422Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1423 int fd, int do_report)
d5a9bfb0 1424{
27da23d5 1425 dVAR;
a0fd4948 1426#if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__)
cd39f2b6
JH
1427 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1428#else
79072805 1429 if (sp > mark) {
c3c5fad7 1430 char **a;
6136c704 1431 const char *tmps = NULL;
c3c5fad7
DM
1432 Newx(PL_Argv, sp - mark + 1, char*);
1433 a = PL_Argv;
890ce7af 1434
79072805
LW
1435 while (++mark <= sp) {
1436 if (*mark)
e62f0680 1437 *a++ = (char*)SvPV_nolen_const(*mark);
a687059c
LW
1438 else
1439 *a++ = "";
1440 }
6136c704 1441 *a = NULL;
91b2752f 1442 if (really)
e62f0680 1443 tmps = SvPV_nolen_const(really);
91b2752f
RG
1444 if ((!really && *PL_Argv[0] != '/') ||
1445 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1446 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1447 PERL_FPU_PRE_EXEC
91b2752f 1448 if (really && *tmps)
b4748376 1449 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1450 else
b4748376 1451 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1452 PERL_FPU_POST_EXEC
a0f2c8ec 1453 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
a687059c 1454 }
bee1dbe2 1455 do_execfree();
cd39f2b6 1456#endif
a687059c
LW
1457 return FALSE;
1458}
1459
fe14fcc3 1460void
864dbfa3 1461Perl_do_execfree(pTHX)
ff8e2863 1462{
97aff369 1463 dVAR;
43c5f42d 1464 Safefree(PL_Argv);
4608196e 1465 PL_Argv = NULL;
43c5f42d 1466 Safefree(PL_Cmd);
bd61b366 1467 PL_Cmd = NULL;
ff8e2863
LW
1468}
1469
9555a685 1470#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1471
1472bool
2fbb330f 1473Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1474{
27da23d5 1475 dVAR;
a687059c
LW
1476 register char **a;
1477 register char *s;
2fbb330f 1478 char *cmd;
2fbb330f
JM
1479
1480 /* Make a copy so we can change it */
0bcc34c2 1481 const int cmdlen = strlen(incmd);
2fbb330f
JM
1482 Newx(cmd, cmdlen+1, char);
1483 strncpy(cmd, incmd, cmdlen);
1484 cmd[cmdlen] = 0;
a687059c 1485
748a9306
LW
1486 while (*cmd && isSPACE(*cmd))
1487 cmd++;
1488
a687059c
LW
1489 /* save an extra exec if possible */
1490
bf38876a 1491#ifdef CSH
d05c1ba0 1492 {
0c19750d 1493 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1494 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1495 strnEQ(cmd+PL_cshlen," -c",3)) {
0c19750d
SP
1496#ifdef HAS_STRLCPY
1497 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1498#else
d05c1ba0 1499 strcpy(flags,"-c");
0c19750d 1500#endif
d05c1ba0
JH
1501 s = cmd+PL_cshlen+3;
1502 if (*s == 'f') {
1503 s++;
0c19750d 1504#ifdef HAS_STRLCPY
e9ed3d63 1505 strlcat(flags, "f", PERL_FLAGS_MAX - 2);
0c19750d 1506#else
d05c1ba0 1507 strcat(flags,"f");
0c19750d 1508#endif
d05c1ba0
JH
1509 }
1510 if (*s == ' ')
1511 s++;
1512 if (*s++ == '\'') {
0bcc34c2 1513 char * const ncmd = s;
d05c1ba0
JH
1514
1515 while (*s)
1516 s++;
1517 if (s[-1] == '\n')
1518 *--s = '\0';
1519 if (s[-1] == '\'') {
1520 *--s = '\0';
b35112e7 1521 PERL_FPU_PRE_EXEC
35da51f7 1522 PerlProc_execl(PL_cshname, "csh", flags, ncmd, NULL);
b35112e7 1523 PERL_FPU_POST_EXEC
d05c1ba0 1524 *s = '\'';
a0f2c8ec 1525 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
2fbb330f 1526 Safefree(cmd);
d05c1ba0
JH
1527 return FALSE;
1528 }
1529 }
a687059c
LW
1530 }
1531 }
bf38876a 1532#endif /* CSH */
a687059c
LW
1533
1534 /* see if there are shell metacharacters in it */
1535
748a9306
LW
1536 if (*cmd == '.' && isSPACE(cmd[1]))
1537 goto doshell;
1538
1539 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1540 goto doshell;
1541
294b3b39
AL
1542 s = cmd;
1543 while (isALNUM(*s))
1544 s++; /* catch VAR=val gizmo */
63f2c1e1
LW
1545 if (*s == '=')
1546 goto doshell;
748a9306 1547
a687059c 1548 for (s = cmd; *s; s++) {
d05c1ba0
JH
1549 if (*s != ' ' && !isALPHA(*s) &&
1550 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1551 if (*s == '\n' && !s[1]) {
1552 *s = '\0';
1553 break;
1554 }
603a98b0
IZ
1555 /* handle the 2>&1 construct at the end */
1556 if (*s == '>' && s[1] == '&' && s[2] == '1'
1557 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1558 && (!s[3] || isSPACE(s[3])))
1559 {
6867be6d 1560 const char *t = s + 3;
603a98b0
IZ
1561
1562 while (*t && isSPACE(*t))
1563 ++t;
943bbd07 1564 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1565 s[-2] = '\0';
1566 break;
1567 }
1568 }
a687059c 1569 doshell:
b35112e7 1570 PERL_FPU_PRE_EXEC
35da51f7 1571 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, NULL);
b35112e7 1572 PERL_FPU_POST_EXEC
a0f2c8ec 1573 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
2fbb330f 1574 Safefree(cmd);
a687059c
LW
1575 return FALSE;
1576 }
1577 }
748a9306 1578
a02a5408 1579 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
3280af22
NIS
1580 PL_Cmd = savepvn(cmd, s-cmd);
1581 a = PL_Argv;
1582 for (s = PL_Cmd; *s;) {
294b3b39
AL
1583 while (isSPACE(*s))
1584 s++;
a687059c
LW
1585 if (*s)
1586 *(a++) = s;
294b3b39
AL
1587 while (*s && !isSPACE(*s))
1588 s++;
a687059c
LW
1589 if (*s)
1590 *s++ = '\0';
1591 }
6136c704 1592 *a = NULL;
3280af22 1593 if (PL_Argv[0]) {
b35112e7 1594 PERL_FPU_PRE_EXEC
3280af22 1595 PerlProc_execvp(PL_Argv[0],PL_Argv);
b35112e7 1596 PERL_FPU_POST_EXEC
b1248f16 1597 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1598 do_execfree();
a687059c 1599 goto doshell;
b1248f16 1600 }
a0f2c8ec 1601 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
a687059c 1602 }
ff8e2863 1603 do_execfree();
2fbb330f 1604 Safefree(cmd);
a687059c
LW
1605 return FALSE;
1606}
1607
6890e559 1608#endif /* OS2 || WIN32 */
760ac839 1609
79072805 1610I32
864dbfa3 1611Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1612{
97aff369 1613 dVAR;
79072805 1614 register I32 val;
79072805 1615 register I32 tot = 0;
4634a855 1616 const char *const what = PL_op_name[type];
5c144d81 1617 const char *s;
890ce7af 1618 SV ** const oldmark = mark;
a687059c 1619
1444765e
NC
1620 /* Doing this ahead of the switch statement preserves the old behaviour,
1621 where attempting to use kill as a taint test test would fail on
1622 platforms where kill was not defined. */
1623#ifndef HAS_KILL
1624 if (type == OP_KILL)
4634a855 1625 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1626#endif
1627#ifndef HAS_CHOWN
1628 if (type == OP_CHOWN)
4634a855 1629 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1630#endif
1631
1632
20408e3c 1633#define APPLY_TAINT_PROPER() \
3280af22 1634 STMT_START { \
17406bd6 1635 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1636 } STMT_END
20408e3c
GS
1637
1638 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1639 if (PL_tainting) {
463ee0b2 1640 while (++mark <= sp) {
bbce6d69
PP
1641 if (SvTAINTED(*mark)) {
1642 TAINT;
1643 break;
1644 }
463ee0b2
LW
1645 }
1646 mark = oldmark;
1647 }
a687059c 1648 switch (type) {
79072805 1649 case OP_CHMOD:
20408e3c 1650 APPLY_TAINT_PROPER();
79072805 1651 if (++mark <= sp) {
463ee0b2 1652 val = SvIVx(*mark);
20408e3c
GS
1653 APPLY_TAINT_PROPER();
1654 tot = sp - mark;
79072805 1655 while (++mark <= sp) {
c4aca7d0
GA
1656 GV* gv;
1657 if (SvTYPE(*mark) == SVt_PVGV) {
1658 gv = (GV*)*mark;
1659 do_fchmod:
1660 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1661#ifdef HAS_FCHMOD
1662 APPLY_TAINT_PROPER();
1663 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1664 tot--;
1665#else
b9c6780e 1666 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1667#endif
1668 }
1669 else {
1670 tot--;
1671 }
1672 }
1673 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1674 gv = (GV*)SvRV(*mark);
1675 goto do_fchmod;
1676 }
1677 else {
1678 const char *name = SvPV_nolen_const(*mark);
1679 APPLY_TAINT_PROPER();
1680 if (PerlLIO_chmod(name, val))
1681 tot--;
1682 }
a687059c
LW
1683 }
1684 }
1685 break;
fe14fcc3 1686#ifdef HAS_CHOWN
79072805 1687 case OP_CHOWN:
20408e3c 1688 APPLY_TAINT_PROPER();
79072805 1689 if (sp - mark > 2) {
6867be6d 1690 register I32 val2;
463ee0b2
LW
1691 val = SvIVx(*++mark);
1692 val2 = SvIVx(*++mark);
20408e3c 1693 APPLY_TAINT_PROPER();
a0d0e21e 1694 tot = sp - mark;
79072805 1695 while (++mark <= sp) {
c4aca7d0
GA
1696 GV* gv;
1697 if (SvTYPE(*mark) == SVt_PVGV) {
1698 gv = (GV*)*mark;
1699 do_fchown:
1700 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1701#ifdef HAS_FCHOWN
1702 APPLY_TAINT_PROPER();
1703 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1704 tot--;
1705#else
b9c6780e 1706 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1707#endif
1708 }
1709 else {
1710 tot--;
1711 }
1712 }
1713 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1714 gv = (GV*)SvRV(*mark);
1715 goto do_fchown;
1716 }
1717 else {
1718 const char *name = SvPV_nolen_const(*mark);
1719 APPLY_TAINT_PROPER();
1720 if (PerlLIO_chown(name, val, val2))
1721 tot--;
1722 }
a687059c
LW
1723 }
1724 }
1725 break;
b1248f16 1726#endif
a1d180c4 1727/*
dd64f1c3
AD
1728XXX Should we make lchown() directly available from perl?
1729For now, we'll let Configure test for HAS_LCHOWN, but do
1730nothing in the core.
1731 --AD 5/1998
1732*/
fe14fcc3 1733#ifdef HAS_KILL
79072805 1734 case OP_KILL:
20408e3c 1735 APPLY_TAINT_PROPER();
55497cff
PP
1736 if (mark == sp)
1737 break;
e62f0680 1738 s = SvPVx_nolen_const(*++mark);
e02bfb16 1739 if (isALPHA(*s)) {
79072805
LW
1740 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1741 s += 3;
e02bfb16 1742 if ((val = whichsig(s)) < 0)
cea2e8a9 1743 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1744 }
1745 else
463ee0b2 1746 val = SvIVx(*mark);
20408e3c
GS
1747 APPLY_TAINT_PROPER();
1748 tot = sp - mark;
3595fcef
PP
1749#ifdef VMS
1750 /* kill() doesn't do process groups (job trees?) under VMS */
1751 if (val < 0) val = -val;
1752 if (val == SIGKILL) {
1753# include <starlet.h>
1754 /* Use native sys$delprc() to insure that target process is
1755 * deleted; supervisor-mode images don't pay attention to
1756 * CRTL's emulation of Unix-style signals and kill()
1757 */
1758 while (++mark <= sp) {
1759 I32 proc = SvIVx(*mark);
1760 register unsigned long int __vmssts;
20408e3c 1761 APPLY_TAINT_PROPER();
3595fcef
PP
1762 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1763 tot--;
1764 switch (__vmssts) {
1765 case SS$_NONEXPR:
1766 case SS$_NOSUCHNODE:
1767 SETERRNO(ESRCH,__vmssts);
1768 break;
1769 case SS$_NOPRIV:
1770 SETERRNO(EPERM,__vmssts);
1771 break;
1772 default:
1773 SETERRNO(EVMSERR,__vmssts);
1774 }
1775 }
1776 }
1777 break;
1778 }
1779#endif
79072805
LW
1780 if (val < 0) {
1781 val = -val;
1782 while (++mark <= sp) {
0bcc34c2 1783 const I32 proc = SvIVx(*mark);
20408e3c 1784 APPLY_TAINT_PROPER();
fe14fcc3 1785#ifdef HAS_KILLPG
3028581b 1786 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1787#else
3028581b 1788 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1789#endif
79072805 1790 tot--;
a687059c 1791 }
79072805
LW
1792 }
1793 else {
1794 while (++mark <= sp) {
0bcc34c2 1795 const I32 proc = SvIVx(*mark);
20408e3c
GS
1796 APPLY_TAINT_PROPER();
1797 if (PerlProc_kill(proc, val))
79072805 1798 tot--;
a687059c
LW
1799 }
1800 }
1801 break;
b1248f16 1802#endif
79072805 1803 case OP_UNLINK:
20408e3c 1804 APPLY_TAINT_PROPER();
79072805
LW
1805 tot = sp - mark;
1806 while (++mark <= sp) {
e62f0680 1807 s = SvPV_nolen_const(*mark);
20408e3c 1808 APPLY_TAINT_PROPER();
3280af22 1809 if (PL_euid || PL_unsafe) {
b8ffc8df 1810 if (UNLINK(s))
a687059c
LW
1811 tot--;
1812 }
1813 else { /* don't let root wipe out directories without -U */
3280af22 1814 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1815 tot--;
1816 else {
b8ffc8df 1817 if (UNLINK(s))
a687059c
LW
1818 tot--;
1819 }
1820 }
1821 }
1822 break;
e96b369d 1823#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1824 case OP_UTIME:
20408e3c 1825 APPLY_TAINT_PROPER();
79072805 1826 if (sp - mark > 2) {
e96b369d
GA
1827#if defined(HAS_FUTIMES)
1828 struct timeval utbuf[2];
1829 void *utbufp = utbuf;
1830#elif defined(I_UTIME) || defined(VMS)
663a0e37 1831 struct utimbuf utbuf;
07409e01 1832 struct utimbuf *utbufp = &utbuf;
663a0e37 1833#else
a687059c 1834 struct {
dd2821f6
GS
1835 Time_t actime;
1836 Time_t modtime;
a687059c 1837 } utbuf;
07409e01 1838 void *utbufp = &utbuf;
663a0e37 1839#endif
a687059c 1840
0bcc34c2
AL
1841 SV* const accessed = *++mark;
1842 SV* const modified = *++mark;
c6f7b413 1843
6ec06612
SB
1844 /* Be like C, and if both times are undefined, let the C
1845 * library figure out what to do. This usually means
1846 * "current time". */
c6f7b413
RS
1847
1848 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1849 utbufp = NULL;
1850 else {
1851 Zero(&utbuf, sizeof utbuf, char);
e96b369d
GA
1852#ifdef HAS_FUTIMES
1853 utbuf[0].tv_sec = (long)SvIVx(accessed); /* time accessed */
1854 utbuf[0].tv_usec = 0;
1855 utbuf[1].tv_sec = (long)SvIVx(modified); /* time modified */
1856 utbuf[1].tv_usec = 0;
1857#elif defined(BIG_TIME)
6ec06612
SB
1858 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1859 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
517844ec 1860#else
6ec06612
SB
1861 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1862 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
517844ec 1863#endif
6ec06612 1864 }
4373e329 1865 APPLY_TAINT_PROPER();
79072805
LW
1866 tot = sp - mark;
1867 while (++mark <= sp) {
e96b369d
GA
1868 GV* gv;
1869 if (SvTYPE(*mark) == SVt_PVGV) {
1870 gv = (GV*)*mark;
1871 do_futimes:
1872 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1873#ifdef HAS_FUTIMES
1874 APPLY_TAINT_PROPER();
1875 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), utbufp))
1876 tot--;
1877#else
1878 Perl_die(aTHX_ PL_no_func, "futimes");
1879#endif
1880 }
1881 else {
1882 tot--;
1883 }
1884 }
1885 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1886 gv = (GV*)SvRV(*mark);
1887 goto do_futimes;
1888 }
1889 else {
0bcc34c2 1890 const char * const name = SvPV_nolen_const(*mark);
e96b369d
GA
1891 APPLY_TAINT_PROPER();
1892#ifdef HAS_FUTIMES
1893 if (utimes(name, utbufp))
1894#else
1895 if (PerlLIO_utime(name, utbufp))
1896#endif
1897 tot--;
1898 }
1899
a687059c 1900 }
a687059c
LW
1901 }
1902 else
79072805 1903 tot = 0;
a687059c 1904 break;
a0d0e21e 1905#endif
a687059c
LW
1906 }
1907 return tot;
20408e3c 1908
20408e3c 1909#undef APPLY_TAINT_PROPER
a687059c
LW
1910}
1911
1912/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1913#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1914bool
ae1951c1
NC
1915Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1916/* effective is a flag, true for EUID, or for checking if the effective gid
1917 * is in the list of groups returned from getgroups().
1918 */
a687059c 1919{
97aff369 1920 dVAR;
bee1dbe2 1921#ifdef DOSISH
fe14fcc3
LW
1922 /* [Comments and code from Len Reed]
1923 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1924 * to write-protected files. The execute permission bit is set
1925 * by the Miscrosoft C library stat() function for the following:
1926 * .exe files
1927 * .com files
1928 * .bat files
1929 * directories
1930 * All files and directories are readable.
1931 * Directories and special files, e.g. "CON", cannot be
1932 * write-protected.
1933 * [Comment by Tom Dinger -- a directory can have the write-protect
1934 * bit set in the file system, but DOS permits changes to
1935 * the directory anyway. In addition, all bets are off
1936 * here for networked software, such as Novell and
1937 * Sun's PC-NFS.]
1938 */
1939
bee1dbe2
LW
1940 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1941 * too so it will actually look into the files for magic numbers
1942 */
7f4774ae 1943 return (mode & statbufp->st_mode) ? TRUE : FALSE;
fe14fcc3 1944
55497cff 1945#else /* ! DOSISH */
3280af22 1946 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
7f4774ae 1947 if (mode == S_IXUSR) {
c623bd54 1948 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1949 return TRUE;
1950 }
1951 else
1952 return TRUE; /* root reads and writes anything */
1953 return FALSE;
1954 }
3280af22 1955 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
7f4774ae 1956 if (statbufp->st_mode & mode)
a687059c
LW
1957 return TRUE; /* ok as "user" */
1958 }
d8eceb89 1959 else if (ingroup(statbufp->st_gid,effective)) {
7f4774ae 1960 if (statbufp->st_mode & mode >> 3)
a687059c
LW
1961 return TRUE; /* ok as "group" */
1962 }
7f4774ae 1963 else if (statbufp->st_mode & mode >> 6)
a687059c
LW
1964 return TRUE; /* ok as "other" */
1965 return FALSE;
55497cff 1966#endif /* ! DOSISH */
a687059c 1967}
a0d0e21e 1968#endif /* ! VMS */
a687059c 1969
d8eceb89 1970bool
ae1951c1 1971Perl_ingroup(pTHX_ Gid_t testgid, bool effective)
a687059c 1972{
cd39f2b6
JH
1973#ifdef MACOS_TRADITIONAL
1974 /* This is simply not correct for AppleShare, but fix it yerself. */
1975 return TRUE;
1976#else
97aff369 1977 dVAR;
3280af22 1978 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1979 return TRUE;
fe14fcc3 1980#ifdef HAS_GETGROUPS
a687059c 1981 {
331b57bc 1982 Groups_t *gary = NULL;
79072805 1983 I32 anum;
331b57bc 1984 bool rc = FALSE;
a687059c 1985
331b57bc
SP
1986 anum = getgroups(0, gary);
1987 Newx(gary, anum, Groups_t);
1988 anum = getgroups(anum, gary);
a687059c 1989 while (--anum >= 0)
331b57bc
SP
1990 if (gary[anum] == testgid) {
1991 rc = TRUE;
1992 break;
1993 }
1994
1995 Safefree(gary);
1996 return rc;
a687059c 1997 }
c685562b 1998#else
a687059c 1999 return FALSE;
cd39f2b6 2000#endif
c685562b 2001#endif
a687059c 2002}
c2ab57d4 2003
fe14fcc3 2004#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 2005
79072805 2006I32
864dbfa3 2007Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2008{
97aff369 2009 dVAR;
0bcc34c2 2010 const key_t key = (key_t)SvNVx(*++mark);
6867be6d
AL
2011 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
2012 const I32 flags = SvIVx(*++mark);
294a48e9
AL
2013
2014 PERL_UNUSED_ARG(sp);
c2ab57d4 2015
748a9306 2016 SETERRNO(0,0);
c2ab57d4
LW
2017 switch (optype)
2018 {
fe14fcc3 2019#ifdef HAS_MSG
79072805 2020 case OP_MSGGET:
c2ab57d4 2021 return msgget(key, flags);
e5d73d77 2022#endif
fe14fcc3 2023#ifdef HAS_SEM
79072805 2024 case OP_SEMGET:
c2ab57d4 2025 return semget(key, n, flags);
e5d73d77 2026#endif
fe14fcc3 2027#ifdef HAS_SHM
79072805 2028 case OP_SHMGET:
c2ab57d4 2029 return shmget(key, n, flags);
e5d73d77 2030#endif
fe14fcc3 2031#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2032 default:
cea2e8a9 2033 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2034#endif
c2ab57d4
LW
2035 }
2036 return -1; /* should never happen */
2037}
2038
79072805 2039I32
864dbfa3 2040Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2041{
97aff369 2042 dVAR;
c2ab57d4 2043 char *a;
a0d0e21e 2044 I32 ret = -1;
6867be6d 2045 const I32 id = SvIVx(*++mark);
95b63a38 2046#ifdef Semctl
6867be6d 2047 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
95b63a38 2048#endif
6867be6d 2049 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
2050 SV * const astr = *++mark;
2051 STRLEN infosize = 0;
2052 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 2053
0bcc34c2 2054 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
2055
2056 switch (optype)
2057 {
fe14fcc3 2058#ifdef HAS_MSG
79072805 2059 case OP_MSGCTL:
c2ab57d4
LW
2060 if (cmd == IPC_STAT || cmd == IPC_SET)
2061 infosize = sizeof(struct msqid_ds);
2062 break;
e5d73d77 2063#endif
fe14fcc3 2064#ifdef HAS_SHM
79072805 2065 case OP_SHMCTL:
c2ab57d4
LW
2066 if (cmd == IPC_STAT || cmd == IPC_SET)
2067 infosize = sizeof(struct shmid_ds);
2068 break;
e5d73d77 2069#endif
fe14fcc3 2070#ifdef HAS_SEM
79072805 2071 case OP_SEMCTL:
39398f3f 2072#ifdef Semctl
c2ab57d4
LW
2073 if (cmd == IPC_STAT || cmd == IPC_SET)
2074 infosize = sizeof(struct semid_ds);
2075 else if (cmd == GETALL || cmd == SETALL)
2076 {
8e591e46 2077 struct semid_ds semds;
bd89102f 2078 union semun semun;
e6f0bdd6
GS
2079#ifdef EXTRA_F_IN_SEMUN_BUF
2080 semun.buff = &semds;
2081#else
84902520 2082 semun.buf = &semds;
e6f0bdd6 2083#endif
c2ab57d4 2084 getinfo = (cmd == GETALL);
9b89d93d
GB
2085 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2086 return -1;
6e21c824
LW
2087 infosize = semds.sem_nsems * sizeof(short);
2088 /* "short" is technically wrong but much more portable
2089 than guessing about u_?short(_t)? */
c2ab57d4 2090 }
39398f3f 2091#else
cea2e8a9 2092 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2093#endif
c2ab57d4 2094 break;
e5d73d77 2095#endif
fe14fcc3 2096#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2097 default:
cea2e8a9 2098 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2099#endif
c2ab57d4
LW
2100 }
2101
2102 if (infosize)
2103 {
2104 if (getinfo)
2105 {
93524f2b 2106 SvPV_force_nolen(astr);
a0d0e21e 2107 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
2108 }
2109 else
2110 {
93524f2b 2111 STRLEN len;
463ee0b2
LW
2112 a = SvPV(astr, len);
2113 if (len != infosize)
cea2e8a9 2114 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
2115 PL_op_desc[optype],
2116 (unsigned long)len,
2117 (long)infosize);
c2ab57d4
LW
2118 }
2119 }
2120 else
2121 {
0bcc34c2 2122 const IV i = SvIV(astr);
56431972 2123 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2124 }
748a9306 2125 SETERRNO(0,0);
c2ab57d4
LW
2126 switch (optype)
2127 {
fe14fcc3 2128#ifdef HAS_MSG
79072805 2129 case OP_MSGCTL:
bee1dbe2 2130 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2131 break;
e5d73d77 2132#endif
fe14fcc3 2133#ifdef HAS_SEM
bd89102f 2134 case OP_SEMCTL: {
39398f3f 2135#ifdef Semctl
bd89102f
AD
2136 union semun unsemds;
2137
e6f0bdd6
GS
2138#ifdef EXTRA_F_IN_SEMUN_BUF
2139 unsemds.buff = (struct semid_ds *)a;
2140#else
bd89102f 2141 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2142#endif
bd89102f 2143 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2144#else
cea2e8a9 2145 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2146#endif
bd89102f 2147 }
c2ab57d4 2148 break;
e5d73d77 2149#endif
fe14fcc3 2150#ifdef HAS_SHM
79072805 2151 case OP_SHMCTL:
bee1dbe2 2152 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2153 break;
e5d73d77 2154#endif
c2ab57d4
LW
2155 }
2156 if (getinfo && ret >= 0) {
79072805
LW
2157 SvCUR_set(astr, infosize);
2158 *SvEND(astr) = '\0';
a0d0e21e 2159 SvSETMAGIC(astr);
c2ab57d4
LW
2160 }
2161 return ret;
2162}
2163
79072805 2164I32
864dbfa3 2165Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2166{
97aff369 2167 dVAR;
fe14fcc3 2168#ifdef HAS_MSG
463ee0b2 2169 STRLEN len;
6867be6d 2170 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2171 SV * const mstr = *++mark;
2172 const I32 flags = SvIVx(*++mark);
2173 const char * const mbuf = SvPV_const(mstr, len);
2174 const I32 msize = len - sizeof(long);
2175
890ce7af 2176 PERL_UNUSED_ARG(sp);
c2ab57d4 2177
0bcc34c2 2178 if (msize < 0)
cea2e8a9 2179 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2180 SETERRNO(0,0);
bee1dbe2 2181 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2182#else
cea2e8a9 2183 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2184#endif
c2ab57d4
LW
2185}
2186
79072805 2187I32
864dbfa3 2188Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2189{
fe14fcc3 2190#ifdef HAS_MSG
97aff369 2191 dVAR;
c2ab57d4
LW
2192 char *mbuf;
2193 long mtype;
6867be6d 2194 I32 msize, flags, ret;
6867be6d 2195 const I32 id = SvIVx(*++mark);
0bcc34c2 2196 SV * const mstr = *++mark;
890ce7af 2197 PERL_UNUSED_ARG(sp);
79072805 2198
c2e66d9e
GS
2199 /* suppress warning when reading into undef var --jhi */
2200 if (! SvOK(mstr))
2201 sv_setpvn(mstr, "", 0);
463ee0b2
LW
2202 msize = SvIVx(*++mark);
2203 mtype = (long)SvIVx(*++mark);
2204 flags = SvIVx(*++mark);
93524f2b 2205 SvPV_force_nolen(mstr);
a0d0e21e 2206 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2207
748a9306 2208 SETERRNO(0,0);
bee1dbe2 2209 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2210 if (ret >= 0) {
79072805
LW
2211 SvCUR_set(mstr, sizeof(long)+ret);
2212 *SvEND(mstr) = '\0';
41d6edb2
JH
2213#ifndef INCOMPLETE_TAINTS
2214 /* who knows who has been playing with this message? */
2215 SvTAINTED_on(mstr);
2216#endif
c2ab57d4
LW
2217 }
2218 return ret;
e5d73d77 2219#else
cea2e8a9 2220 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2221#endif
c2ab57d4
LW
2222}
2223
79072805 2224I32
864dbfa3 2225Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2226{
fe14fcc3 2227#ifdef HAS_SEM
97aff369 2228 dVAR;
463ee0b2 2229 STRLEN opsize;
6867be6d 2230 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2231 SV * const opstr = *++mark;
2232 const char * const opbuf = SvPV_const(opstr, opsize);
890ce7af 2233 PERL_UNUSED_ARG(sp);
c2ab57d4 2234
248ff010
NC
2235 if (opsize < 3 * SHORTSIZE
2236 || (opsize % (3 * SHORTSIZE))) {
93189314 2237 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2238 return -1;
2239 }
748a9306 2240 SETERRNO(0,0);
248ff010
NC
2241 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2242 {
6867be6d 2243 const int nsops = opsize / (3 * sizeof (short));
248ff010 2244 int i = nsops;
0bcc34c2 2245 short * const ops = (short *) opbuf;
248ff010
NC
2246 short *o = ops;
2247 struct sembuf *temps, *t;
2248 I32 result;
2249
a02a5408 2250 Newx (temps, nsops, struct sembuf);
248ff010
NC
2251 t = temps;
2252 while (i--) {
2253 t->sem_num = *o++;
2254 t->sem_op = *o++;
2255 t->sem_flg = *o++;
2256 t++;
2257 }
2258 result = semop(id, temps, nsops);
2259 t = temps;
2260 o = ops;
2261 i = nsops;
2262 while (i--) {
2263 *o++ = t->sem_num;
2264 *o++ = t->sem_op;
2265 *o++ = t->sem_flg;
2266 t++;
2267 }
2268 Safefree(temps);
2269 return result;
2270 }
e5d73d77 2271#else
cea2e8a9 2272 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2273#endif
c2ab57d4
LW
2274}
2275
79072805 2276I32
864dbfa3 2277Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2278{
fe14fcc3 2279#ifdef HAS_SHM
97aff369 2280 dVAR;
4373e329 2281 char *shm;
c2ab57d4 2282 struct shmid_ds shmds;
6867be6d 2283 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2284 SV * const mstr = *++mark;
2285 const I32 mpos = SvIVx(*++mark);
2286 const I32 msize = SvIVx(*++mark);
890ce7af 2287 PERL_UNUSED_ARG(sp);
c2ab57d4 2288
748a9306 2289 SETERRNO(0,0);
c2ab57d4
LW
2290 if (shmctl(id, IPC_STAT, &shmds) == -1)
2291 return -1;
bb7a0f54 2292 if (mpos < 0 || msize < 0 || (size_t)mpos + msize > shmds.shm_segsz) {
93189314 2293 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2294 return -1;
2295 }
d4c19fe8 2296 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2297 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2298 return -1;
79072805 2299 if (optype == OP_SHMREAD) {
4373e329 2300 const char *mbuf;
9f538c04
GS
2301 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2302 if (! SvOK(mstr))
2303 sv_setpvn(mstr, "", 0);
93524f2b 2304 SvPV_force_nolen(mstr);
bb7a0f54 2305 mbuf = SvGROW(mstr, (STRLEN)msize+1);
a0d0e21e 2306
bee1dbe2 2307 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2308 SvCUR_set(mstr, msize);
2309 *SvEND(mstr) = '\0';
a0d0e21e 2310 SvSETMAGIC(mstr);
d929ce6f
JH
2311#ifndef INCOMPLETE_TAINTS
2312 /* who knows who has been playing with this shared memory? */
2313 SvTAINTED_on(mstr);
2314#endif
c2ab57d4
LW
2315 }
2316 else {
93524f2b 2317 STRLEN len;
c2ab57d4 2318
93524f2b 2319 const char *mbuf = SvPV_const(mstr, len);
35da51f7 2320 const I32 n = (len > msize) ? msize : len;
bee1dbe2 2321 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2322 if (n < msize)
bee1dbe2 2323 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2324 }
2325 return shmdt(shm);
e5d73d77 2326#else
cea2e8a9 2327 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2328#endif
c2ab57d4
LW
2329}
2330
fe14fcc3 2331#endif /* SYSV IPC */
4e35701f 2332
0d44d22b 2333/*
ccfc67b7
JH
2334=head1 IO Functions
2335
0d44d22b
NC
2336=for apidoc start_glob
2337
2338Function called by C<do_readline> to spawn a glob (or do the glob inside
2339perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2340this glob starter is only used by miniperl during the build process.
0d44d22b 2341Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2342
0d44d22b
NC
2343=cut
2344*/
2345
2346PerlIO *
2347Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2348{
27da23d5 2349 dVAR;
561b68a9 2350 SV * const tmpcmd = newSV(0);
0d44d22b
NC
2351 PerlIO *fp;
2352 ENTER;
2353 SAVEFREESV(tmpcmd);
2354#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2355 /* since spawning off a process is a real performance hit */
dca5a913
JM
2356
2357PerlIO *
2358Perl_vms_start_glob
2359 (pTHX_ SV *tmpglob,
2360 IO *io);
2361
49a7a762 2362 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
dca5a913 2363
0d44d22b
NC
2364#else /* !VMS */
2365#ifdef MACOS_TRADITIONAL
2366 sv_setpv(tmpcmd, "glob ");
2367 sv_catsv(tmpcmd, tmpglob);
2368 sv_catpv(tmpcmd, " |");
2369#else
2370#ifdef DOSISH
2371#ifdef OS2
2372 sv_setpv(tmpcmd, "for a in ");
2373 sv_catsv(tmpcmd, tmpglob);
2374 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2375#else
2376#ifdef DJGPP
2377 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2378 sv_catsv(tmpcmd, tmpglob);
2379#else
2380 sv_setpv(tmpcmd, "perlglob ");
2381 sv_catsv(tmpcmd, tmpglob);
2382 sv_catpv(tmpcmd, " |");
2383#endif /* !DJGPP */
2384#endif /* !OS2 */
2385#else /* !DOSISH */
2386#if defined(CSH)
2387 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2388 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2389 sv_catsv(tmpcmd, tmpglob);
2390 sv_catpv(tmpcmd, "' 2>/dev/null |");
2391#else
2392 sv_setpv(tmpcmd, "echo ");
2393 sv_catsv(tmpcmd, tmpglob);
2394#if 'z' - 'a' == 25
2395 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2396#else
2397 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2398#endif
2399#endif /* !CSH */
2400#endif /* !DOSISH */
2401#endif /* MACOS_TRADITIONAL */
93524f2b 2402 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
4608196e 2403 FALSE, O_RDONLY, 0, NULL);
0d44d22b
NC
2404 fp = IoIFP(io);
2405#endif /* !VMS */
2406 LEAVE;
2407 return fp;
2408}
66610fdd
RGS
2409
2410/*
2411 * Local variables:
2412 * c-indentation-style: bsd
2413 * c-basic-offset: 4
2414 * indent-tabs-mode: t
2415 * End:
2416 *
37442d52
RGS
2417 * ex: set ts=8 sts=4 sw=4 noet:
2418 */