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[perl5.git] / doio.c
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a0d0e21e 1/* doio.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
770526c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 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);
760ac839
LW
68 PerlIO *saveifp = Nullfp;
69 PerlIO *saveofp = Nullfp;
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;
0c19750d 79 char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\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 }
8990e307 128 IoOFP(io) = IoIFP(io) = Nullfp;
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;
1141d9f8 182 type = Nullch;
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;
ecdeb87c 191 PerlIO *that_fp = NULL;
c07a80fd 192
2fbb330f 193 type = savepvn(oname, len);
b931b1d9 194 tend = type+len;
faecd977 195 SAVEFREEPV(type);
eb649f83
AMS
196
197 /* Lose leading and trailing white space */
eb649f83
AMS
198 for (; isSPACE(*type); type++) ;
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 }
b931b1d9 237 for (type++; isSPACE(*type); type++) ;
faecd977 238 if (!num_svs) {
6170680b 239 name = type;
b931b1d9 240 len = tend-type;
faecd977 241 }
4a7d1889
NIS
242 if (*name == '\0') {
243 /* command is missing 19990114 */
06eaf0bc 244 if (ckWARN(WARN_PIPE))
9014280d 245 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
246 errno = EPIPE;
247 goto say_false;
248 }
770526c1 249 if ((*name == '-' && name[1] == '\0') || num_svs)
c07a80fd
PP
250 TAINT_ENV();
251 TAINT_PROPER("piped open");
b931b1d9 252 if (!num_svs && name[len-1] == '|') {
faecd977 253 name[--len] = '\0' ;
599cee73 254 if (ckWARN(WARN_PIPE))
9014280d 255 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
7b8d334a 256 }
a1d180c4 257 mode[0] = 'w';
c07a80fd 258 writing = 1;
0c19750d
SP
259#ifdef HAS_STRLCAT
260 if (out_raw)
261 strlcat(mode, "b", PERL_MODE_MAX);
262 else if (out_crlf)
263 strlcat(mode, "t", PERL_MODE_MAX);
264#else
a1d180c4
NIS
265 if (out_raw)
266 strcat(mode, "b");
267 else if (out_crlf)
268 strcat(mode, "t");
0c19750d 269#endif
4a7d1889
NIS
270 if (num_svs > 1) {
271 fp = PerlProc_popen_list(mode, num_svs, svp);
272 }
273 else {
274 fp = PerlProc_popen(name,mode);
275 }
1771866f
NIS
276 if (num_svs) {
277 if (*type) {
278 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
279 goto say_false;
280 }
281 }
282 }
c2be40b1 283 } /* IoTYPE_PIPE */
9f37169a 284 else if (*type == IoTYPE_WRONLY) {
c07a80fd 285 TAINT_PROPER("open");
6170680b 286 type++;
9f37169a
JH
287 if (*type == IoTYPE_WRONLY) {
288 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
50952442 289 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
6170680b 290 type++;
a0d0e21e 291 }
ee518936 292 else {
c07a80fd 293 mode[0] = 'w';
ee518936 294 }
c07a80fd
PP
295 writing = 1;
296
0c19750d
SP
297#ifdef HAS_STRLCAT
298 if (out_raw)
299 strlcat(mode, "b", PERL_MODE_MAX);
300 else if (out_crlf)
301 strlcat(mode, "t", PERL_MODE_MAX);
302#else
16fe6d59
GS
303 if (out_raw)
304 strcat(mode, "b");
305 else if (out_crlf)
306 strcat(mode, "t");
0c19750d 307#endif
6170680b 308 if (*type == '&') {
c07a80fd 309 duplicity:
ecdeb87c 310 dodup = PERLIO_DUP_FD;
e620cd72
NIS
311 type++;
312 if (*type == '=') {
c07a80fd 313 dodup = 0;
e620cd72 314 type++;
4a7d1889 315 }
ee518936 316 if (!num_svs && !*type && supplied_fp) {
4a7d1889 317 /* "<+&" etc. is used by typemaps */
c07a80fd 318 fp = supplied_fp;
ee518936 319 }
a0d0e21e 320 else {
e620cd72
NIS
321 if (num_svs > 1) {
322 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
323 }
54edfe98 324 for (; isSPACE(*type); type++) ;
1771866f 325 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
e620cd72 326 fd = SvUV(*svp);
24a7a40d 327 num_svs = 0;
ee518936 328 }
e620cd72 329 else if (isDIGIT(*type)) {
e620cd72
NIS
330 fd = atoi(type);
331 }
c07a80fd 332 else {
e1ec3a88 333 const IO* thatio;
e620cd72
NIS
334 if (num_svs) {
335 thatio = sv_2io(*svp);
336 }
337 else {
338 GV *thatgv;
f776e3cd 339 thatgv = gv_fetchpv(type,0,SVt_PVIO);
e620cd72
NIS
340 thatio = GvIO(thatgv);
341 }
c07a80fd 342 if (!thatio) {
6e21c824 343#ifdef EINVAL
93189314 344 SETERRNO(EINVAL,SS_IVCHAN);
6e21c824 345#endif
c07a80fd
PP
346 goto say_false;
347 }
f4e789af 348 if ((that_fp = IoIFP(thatio))) {
7211d486
JH
349 /* Flush stdio buffer before dup. --mjd
350 * Unfortunately SEEK_CURing 0 seems to
351 * be optimized away on most platforms;
352 * only Solaris and Linux seem to flush
353 * on that. --jhi */
2c534a3f
NC
354#ifdef USE_SFIO
355 /* sfio fails to clear error on next
356 sfwrite, contrary to documentation.
04d26ece 357 -- Nicholas Clark */
ecdeb87c
NIS
358 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
359 PerlIO_clearerr(that_fp);
2c534a3f 360#endif
7211d486
JH
361 /* On the other hand, do all platforms
362 * take gracefully to flushing a read-only
363 * filehandle? Perhaps we should do
364 * fsetpos(src)+fgetpos(dst)? --nik */
ecdeb87c
NIS
365 PerlIO_flush(that_fp);
366 fd = PerlIO_fileno(that_fp);
0759c907
JH
367 /* When dup()ing STDIN, STDOUT or STDERR
368 * explicitly set appropriate access mode */
f4e789af
NC
369 if (that_fp == PerlIO_stdout()
370 || that_fp == PerlIO_stderr())
0759c907 371 IoTYPE(io) = IoTYPE_WRONLY;
f4e789af 372 else if (that_fp == PerlIO_stdin())
0759c907
JH
373 IoTYPE(io) = IoTYPE_RDONLY;
374 /* When dup()ing a socket, say result is
375 * one as well */
376 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
50952442 377 IoTYPE(io) = IoTYPE_SOCKET;
c07a80fd
PP
378 }
379 else
380 fd = -1;
a0d0e21e 381 }
ee518936 382 if (!num_svs)
1141d9f8 383 type = Nullch;
ecdeb87c
NIS
384 if (that_fp) {
385 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
386 }
387 else {
c07a80fd 388 if (dodup)
ecdeb87c
NIS
389 fd = PerlLIO_dup(fd);
390 else
391 was_fdopen = TRUE;
392 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
b42969c0 393 if (dodup && fd >= 0)
ecdeb87c
NIS
394 PerlLIO_close(fd);
395 }
faecd977 396 }
c07a80fd 397 }
ee518936 398 } /* & */
c07a80fd 399 else {
6170680b 400 for (; isSPACE(*type); type++) ;
b931b1d9 401 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 402 type++;
760ac839 403 fp = PerlIO_stdout();
50952442 404 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
405 if (num_svs > 1) {
406 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
407 }
c07a80fd
PP
408 }
409 else {
ee518936 410 if (!num_svs) {
2b2a7552 411 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
412 num_svs = 1;
413 svp = &namesv;
1141d9f8 414 type = Nullch;
ee518936 415 }
6e60e805 416 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
c07a80fd 417 }
ee518936 418 } /* !& */
7e72d509
JH
419 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
420 goto unknown_open_mode;
c2be40b1 421 } /* IoTYPE_WRONLY */
9f37169a 422 else if (*type == IoTYPE_RDONLY) {
6170680b 423 for (type++; isSPACE(*type); type++) ;
bf38876a 424 mode[0] = 'r';
0c19750d
SP
425#ifdef HAS_STRLCAT
426 if (in_raw)
427 strlcat(mode, "b", PERL_MODE_MAX);
428 else if (in_crlf)
429 strlcat(mode, "t", PERL_MODE_MAX);
430#else
16fe6d59
GS
431 if (in_raw)
432 strcat(mode, "b");
433 else if (in_crlf)
434 strcat(mode, "t");
0c19750d 435#endif
6170680b 436 if (*type == '&') {
bf38876a 437 goto duplicity;
6170680b 438 }
b931b1d9 439 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
b931b1d9 440 type++;
760ac839 441 fp = PerlIO_stdin();
50952442 442 IoTYPE(io) = IoTYPE_STD;
7cf31beb
NIS
443 if (num_svs > 1) {
444 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
445 }
a687059c 446 }
ee518936
NIS
447 else {
448 if (!num_svs) {
2b2a7552 449 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
450 num_svs = 1;
451 svp = &namesv;
1141d9f8 452 type = Nullch;
ee518936 453 }
6e60e805 454 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
ee518936 455 }
7e72d509
JH
456 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
457 goto unknown_open_mode;
c2be40b1
JH
458 } /* IoTYPE_RDONLY */
459 else if ((num_svs && /* '-|...' or '...|' */
460 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
b931b1d9 461 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
6170680b 462 if (num_svs) {
b931b1d9 463 type += 2; /* skip over '-|' */
6170680b
IZ
464 }
465 else {
b931b1d9
NIS
466 *--tend = '\0';
467 while (tend > type && isSPACE(tend[-1]))
468 *--tend = '\0';
a6e20a40
AL
469 for (; isSPACE(*type); type++)
470 ;
6170680b 471 name = type;
b931b1d9 472 len = tend-type;
6170680b 473 }
4a7d1889
NIS
474 if (*name == '\0') {
475 /* command is missing 19990114 */
06eaf0bc 476 if (ckWARN(WARN_PIPE))
9014280d 477 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
06eaf0bc
GS
478 errno = EPIPE;
479 goto say_false;
480 }
770526c1 481 if (!(*name == '-' && name[1] == '\0') || num_svs)
79072805
LW
482 TAINT_ENV();
483 TAINT_PROPER("piped open");
a1d180c4 484 mode[0] = 'r';
0c19750d
SP
485
486#ifdef HAS_STRLCAT
487 if (in_raw)
488 strlcat(mode, "b", PERL_MODE_MAX);
489 else if (in_crlf)
490 strlcat(mode, "t", PERL_MODE_MAX);
491#else
a1d180c4
NIS
492 if (in_raw)
493 strcat(mode, "b");
494 else if (in_crlf)
495 strcat(mode, "t");
0c19750d
SP
496#endif
497
4a7d1889
NIS
498 if (num_svs > 1) {
499 fp = PerlProc_popen_list(mode,num_svs,svp);
500 }
e620cd72 501 else {
4a7d1889
NIS
502 fp = PerlProc_popen(name,mode);
503 }
50952442 504 IoTYPE(io) = IoTYPE_PIPE;
1771866f
NIS
505 if (num_svs) {
506 for (; isSPACE(*type); type++) ;
507 if (*type) {
508 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
509 goto say_false;
510 }
511 }
512 }
a687059c 513 }
c2be40b1 514 else { /* layer(Args) */
6170680b 515 if (num_svs)
c2be40b1 516 goto unknown_open_mode;
6170680b 517 name = type;
50952442 518 IoTYPE(io) = IoTYPE_RDONLY;
a6e20a40
AL
519 for (; isSPACE(*name); name++)
520 ;
88b61e10 521 mode[0] = 'r';
0c19750d
SP
522
523#ifdef HAS_STRLCAT
524 if (in_raw)
525 strlcat(mode, "b", PERL_MODE_MAX);
526 else if (in_crlf)
527 strlcat(mode, "t", PERL_MODE_MAX);
528#else
88b61e10
NIS
529 if (in_raw)
530 strcat(mode, "b");
531 else if (in_crlf)
532 strcat(mode, "t");
0c19750d
SP
533#endif
534
770526c1 535 if (*name == '-' && name[1] == '\0') {
760ac839 536 fp = PerlIO_stdin();
50952442 537 IoTYPE(io) = IoTYPE_STD;
a687059c 538 }
16fe6d59 539 else {
ee518936 540 if (!num_svs) {
2b2a7552 541 namesv = sv_2mortal(newSVpvn(type,tend - type));
ee518936
NIS
542 num_svs = 1;
543 svp = &namesv;
1141d9f8 544 type = Nullch;
ee518936 545 }
6e60e805 546 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
16fe6d59 547 }
a687059c
LW
548 }
549 }
bee1dbe2 550 if (!fp) {
ce44635a 551 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
2fbb330f 552 && strchr(oname, '\n')
ce44635a 553
041457d9 554 )
9014280d 555 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
6e21c824 556 goto say_false;
bee1dbe2 557 }
a00b5bd3
NIS
558
559 if (ckWARN(WARN_IO)) {
560 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
561 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
9014280d 562 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
563 "Filehandle STD%s reopened as %s only for input",
564 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
565 GvENAME(gv));
a00b5bd3 566 }
ee518936 567 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
9014280d 568 Perl_warner(aTHX_ packWARN(WARN_IO),
97828cef
RGS
569 "Filehandle STDIN reopened as %s only for output",
570 GvENAME(gv));
a00b5bd3
NIS
571 }
572 }
573
e99cca91 574 fd = PerlIO_fileno(fp);
e934609f
JH
575 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
576 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
e99cca91
NIS
577 * type probe for socket-ness.
578 */
579 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
580 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
581 /* If PerlIO claims to have fd we had better be able to fstat() it. */
582 (void) PerlIO_close(fp);
6e21c824 583 goto say_false;
a687059c 584 }
7114a2d2 585#ifndef PERL_MICRO
3280af22 586 if (S_ISSOCK(PL_statbuf.st_mode))
50952442 587 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
99b89507
LW
588#ifdef HAS_SOCKET
589 else if (
c623bd54 590#ifdef S_IFMT
3280af22 591 !(PL_statbuf.st_mode & S_IFMT)
99b89507 592#else
b28d0864 593 !PL_statbuf.st_mode
99b89507 594#endif
0759c907
JH
595 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
596 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
597 ) { /* on OS's that return 0 on fstat()ed pipe */
e99cca91
NIS
598 char tmpbuf[256];
599 Sock_size_t buflen = sizeof tmpbuf;
600 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
601 || errno != ENOTSOCK)
602 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
603 /* but some return 0 for streams too, sigh */
99b89507 604 }
e99cca91 605#endif /* HAS_SOCKET */
7114a2d2 606#endif /* !PERL_MICRO */
a687059c 607 }
e99cca91
NIS
608
609 /* Eeek - FIXME !!!
610 * If this is a standard handle we discard all the layer stuff
611 * and just dup the fd into whatever was on the handle before !
612 */
613
6e21c824 614 if (saveifp) { /* must use old fp? */
f5b9d040 615 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
24c23ab4 616 then dup the new fileno down
f5b9d040 617 */
6e21c824 618 if (saveofp) {
f5b9d040 619 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 620 if (saveofp != saveifp) { /* was a socket? */
760ac839 621 PerlIO_close(saveofp);
6e21c824
LW
622 }
623 }
6e60e805 624 if (savefd != fd) {
e934609f 625 /* Still a small can-of-worms here if (say) PerlIO::scalar
ecdeb87c
NIS
626 is assigned to (say) STDOUT - for now let dup2() fail
627 and provide the error
628 */
bd4a5668
NIS
629 if (PerlLIO_dup2(fd, savefd) < 0) {
630 (void)PerlIO_close(fp);
631 goto say_false;
632 }
d082dcd6 633#ifdef VMS
6e60e805 634 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
d0e2cf63
AMS
635 char newname[FILENAME_MAX+1];
636 if (PerlIO_getname(fp, newname)) {
637 if (fd == PerlIO_fileno(PerlIO_stdout()))
638 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
639 if (fd == PerlIO_fileno(PerlIO_stderr()))
640 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
641 }
d082dcd6
JH
642 }
643#endif
d0e2cf63
AMS
644
645#if !defined(WIN32)
646 /* PL_fdpid isn't used on Windows, so avoid this useless work.
647 * XXX Probably the same for a lot of other places. */
648 {
649 Pid_t pid;
650 SV *sv;
651
652 LOCK_FDPID_MUTEX;
653 sv = *av_fetch(PL_fdpid,fd,TRUE);
862a34c6 654 SvUPGRADE(sv, SVt_IV);
d0e2cf63 655 pid = SvIVX(sv);
45977657 656 SvIV_set(sv, 0);
d0e2cf63 657 sv = *av_fetch(PL_fdpid,savefd,TRUE);
862a34c6 658 SvUPGRADE(sv, SVt_IV);
45977657 659 SvIV_set(sv, pid);
d0e2cf63
AMS
660 UNLOCK_FDPID_MUTEX;
661 }
662#endif
663
e212fc47
AMS
664 if (was_fdopen) {
665 /* need to close fp without closing underlying fd */
666 int ofd = PerlIO_fileno(fp);
667 int dupfd = PerlLIO_dup(ofd);
03e631df
JH
668#if defined(HAS_FCNTL) && defined(F_SETFD)
669 /* Assume if we have F_SETFD we have F_GETFD */
670 int coe = fcntl(ofd,F_GETFD);
671#endif
e212fc47
AMS
672 PerlIO_close(fp);
673 PerlLIO_dup2(dupfd,ofd);
03e631df
JH
674#if defined(HAS_FCNTL) && defined(F_SETFD)
675 /* The dup trick has lost close-on-exec on ofd */
676 fcntl(ofd,F_SETFD, coe);
677#endif
e212fc47 678 PerlLIO_close(dupfd);
ecdeb87c 679 }
e212fc47
AMS
680 else
681 PerlIO_close(fp);
6e21c824
LW
682 }
683 fp = saveifp;
760ac839 684 PerlIO_clearerr(fp);
e99cca91 685 fd = PerlIO_fileno(fp);
6e21c824 686 }
a0d0e21e 687#if defined(HAS_FCNTL) && defined(F_SETFD)
e99cca91 688 if (fd >= 0) {
0bcc34c2 689 const int save_errno = errno;
a8710ca1
GS
690 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
691 errno = save_errno;
692 }
1462b684 693#endif
8990e307 694 IoIFP(io) = fp;
b931b1d9 695
684bef36 696 IoFLAGS(io) &= ~IOf_NOLINE;
bf38876a 697 if (writing) {
50952442 698 if (IoTYPE(io) == IoTYPE_SOCKET
e99cca91 699 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
a33cf58c 700 char *s = mode;
3b6c1aba
JH
701 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
702 s++;
a33cf58c 703 *s = 'w';
1feb1812 704 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
760ac839 705 PerlIO_close(fp);
8990e307 706 IoIFP(io) = Nullfp;
6e21c824 707 goto say_false;
fe14fcc3 708 }
1462b684
LW
709 }
710 else
8990e307 711 IoOFP(io) = fp;
bf38876a 712 }
a687059c 713 return TRUE;
6e21c824
LW
714
715say_false:
8990e307
LW
716 IoIFP(io) = saveifp;
717 IoOFP(io) = saveofp;
718 IoTYPE(io) = savetype;
6e21c824 719 return FALSE;
a687059c
LW
720}
721
760ac839 722PerlIO *
864dbfa3 723Perl_nextargv(pTHX_ register GV *gv)
a687059c 724{
79072805 725 register SV *sv;
99b89507 726#ifndef FLEXFILENAMES
c623bd54
LW
727 int filedev;
728 int fileino;
99b89507 729#endif
761237fe
JB
730 Uid_t fileuid;
731 Gid_t filegid;
2d03de9c 732 IO * const io = GvIOp(gv);
fe14fcc3 733
3280af22
NIS
734 if (!PL_argvoutgv)
735 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
18708f5a
GS
736 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
737 IoFLAGS(io) &= ~IOf_START;
7a1c5554
GS
738 if (PL_inplace) {
739 if (!PL_argvout_stack)
740 PL_argvout_stack = newAV();
18708f5a 741 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
7a1c5554 742 }
18708f5a 743 }
3280af22
NIS
744 if (PL_filemode & (S_ISUID|S_ISGID)) {
745 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 746#ifdef HAS_FCHMOD
c797f2d8
DM
747 if (PL_lastfd != -1)
748 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 749#else
b28d0864 750 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
751#endif
752 }
c797f2d8 753 PL_lastfd = -1;
3280af22 754 PL_filemode = 0;
5c501b37
JH
755 if (!GvAV(gv))
756 return Nullfp;
79072805 757 while (av_len(GvAV(gv)) >= 0) {
85aff577 758 STRLEN oldlen;
79072805 759 sv = av_shift(GvAV(gv));
8990e307 760 SAVEFREESV(sv);
e203899d 761 sv_setsv(GvSVn(gv),sv);
79072805 762 SvSETMAGIC(GvSV(gv));
3280af22 763 PL_oldname = SvPVx(GvSV(gv), oldlen);
9d116dd7 764 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
3280af22 765 if (PL_inplace) {
79072805 766 TAINT_PROPER("inplace open");
3280af22 767 if (oldlen == 1 && *PL_oldname == '-') {
4633a7c4 768 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
a0d0e21e 769 return IoIFP(GvIOp(gv));
c623bd54 770 }
99b89507 771#ifndef FLEXFILENAMES
b28d0864
NIS
772 filedev = PL_statbuf.st_dev;
773 fileino = PL_statbuf.st_ino;
99b89507 774#endif
3280af22
NIS
775 PL_filemode = PL_statbuf.st_mode;
776 fileuid = PL_statbuf.st_uid;
777 filegid = PL_statbuf.st_gid;
778 if (!S_ISREG(PL_filemode)) {
0453d815 779 if (ckWARN_d(WARN_INPLACE))
9014280d 780 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
781 "Can't do inplace edit: %s is not a regular file",
782 PL_oldname );
79072805 783 do_close(gv,FALSE);
c623bd54
LW
784 continue;
785 }
3280af22 786 if (*PL_inplace) {
2d03de9c 787 const char *star = strchr(PL_inplace, '*');
2d259d92 788 if (star) {
2d03de9c 789 const char *begin = PL_inplace;
2d259d92
CK
790 sv_setpvn(sv, "", 0);
791 do {
792 sv_catpvn(sv, begin, star - begin);
3280af22 793 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
794 begin = ++star;
795 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
796 if (*begin)
797 sv_catpv(sv,begin);
2d259d92
CK
798 }
799 else {
3280af22 800 sv_catpv(sv,PL_inplace);
2d259d92 801 }
c623bd54 802#ifndef FLEXFILENAMES
95a20fc0 803 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
5f74f29c
JH
804 && PL_statbuf.st_dev == filedev
805 && PL_statbuf.st_ino == fileino)
39e571d4 806#ifdef DJGPP
5f74f29c 807 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
39e571d4 808#endif
f248d071
GS
809 )
810 {
811 if (ckWARN_d(WARN_INPLACE))
9014280d 812 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
813 "Can't do inplace edit: %"SVf" would not be unique",
814 sv);
79072805 815 do_close(gv,FALSE);
c623bd54
LW
816 continue;
817 }
818#endif
fe14fcc3 819#ifdef HAS_RENAME
2585f9a3 820#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
95a20fc0 821 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 822 if (ckWARN_d(WARN_INPLACE))
9014280d 823 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
824 "Can't rename %s to %"SVf": %s, skipping file",
825 PL_oldname, sv, Strerror(errno) );
79072805 826 do_close(gv,FALSE);
c623bd54
LW
827 continue;
828 }
a687059c 829#else
79072805 830 do_close(gv,FALSE);
95a20fc0
SP
831 (void)PerlLIO_unlink(SvPVX_const(sv));
832 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
93524f2b
NC
833 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
834 O_RDONLY,0,Nullfp);
55497cff 835#endif /* DOSISH */
ff8e2863 836#else
95a20fc0
SP
837 (void)UNLINK(SvPVX_const(sv));
838 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
0453d815 839 if (ckWARN_d(WARN_INPLACE))
9014280d 840 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
35c1215d
NC
841 "Can't rename %s to %"SVf": %s, skipping file",
842 PL_oldname, sv, Strerror(errno) );
79072805 843 do_close(gv,FALSE);
c623bd54
LW
844 continue;
845 }
b28d0864 846 (void)UNLINK(PL_oldname);
a687059c
LW
847#endif
848 }
849 else {
c030f24b 850#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 851# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 852 if (UNLINK(PL_oldname) < 0) {
0453d815 853 if (ckWARN_d(WARN_INPLACE))
9014280d 854 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
0453d815
PM
855 "Can't remove %s: %s, skipping file",
856 PL_oldname, Strerror(errno) );
79072805 857 do_close(gv,FALSE);
fe14fcc3
LW
858 continue;
859 }
edc7bc49 860# endif
ff8e2863 861#else
cea2e8a9 862 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 863#endif
a687059c
LW
864 }
865
3280af22
NIS
866 sv_setpvn(sv,">",!PL_inplace);
867 sv_catpvn(sv,PL_oldname,oldlen);
748a9306 868 SETERRNO(0,0); /* in case sprintf set errno */
4119ab01 869#ifdef VMS
93524f2b
NC
870 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
871 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
4119ab01 872#else
93524f2b
NC
873 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
874 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
875 Nullfp))
4119ab01 876#endif
18708f5a 877 {
0453d815 878 if (ckWARN_d(WARN_INPLACE))
9014280d 879 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
0453d815 880 PL_oldname, Strerror(errno) );
79072805 881 do_close(gv,FALSE);
fe14fcc3
LW
882 continue;
883 }
3280af22
NIS
884 setdefout(PL_argvoutgv);
885 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
886 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 887#ifdef HAS_FCHMOD
3280af22 888 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 889#else
3e3baf6d
TB
890# if !(defined(WIN32) && defined(__BORLANDC__))
891 /* Borland runtime creates a readonly file! */
b28d0864 892 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 893# endif
a687059c 894#endif
3280af22 895 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 896#ifdef HAS_FCHOWN
3280af22 897 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 898#else
fe14fcc3 899#ifdef HAS_CHOWN
b28d0864 900 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 901#endif
b1248f16 902#endif
fe14fcc3 903 }
a687059c 904 }
a0d0e21e 905 return IoIFP(GvIOp(gv));
a687059c 906 }
4d61ec05 907 else {
4d61ec05 908 if (ckWARN_d(WARN_INPLACE)) {
4373e329 909 const int eno = errno;
6af84f9f
GS
910 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
911 && !S_ISREG(PL_statbuf.st_mode))
912 {
9014280d 913 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
4d61ec05 914 "Can't do inplace edit: %s is not a regular file",
9a7dcd9c 915 PL_oldname);
6af84f9f 916 }
4d61ec05 917 else
9014280d 918 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
6af84f9f 919 PL_oldname, Strerror(eno));
4d61ec05
GS
920 }
921 }
a687059c 922 }
18708f5a
GS
923 if (io && (IoFLAGS(io) & IOf_ARGV))
924 IoFLAGS(io) |= IOf_START;
3280af22
NIS
925 if (PL_inplace) {
926 (void)do_close(PL_argvoutgv,FALSE);
7a1c5554
GS
927 if (io && (IoFLAGS(io) & IOf_ARGV)
928 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
929 {
18708f5a
GS
930 GV *oldout = (GV*)av_pop(PL_argvout_stack);
931 setdefout(oldout);
932 SvREFCNT_dec(oldout);
933 return Nullfp;
934 }
4633a7c4 935 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
a687059c
LW
936 }
937 return Nullfp;
938}
939
517844ec 940/* explicit renamed to avoid C++ conflict -- kja */
a687059c 941bool
864dbfa3 942Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 943{
1193dd27
IZ
944 bool retval;
945 IO *io;
a687059c 946
79072805 947 if (!gv)
3280af22 948 gv = PL_argvgv;
a0d0e21e 949 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1d2dff63 950 if (not_implicit)
93189314 951 SETERRNO(EBADF,SS_IVCHAN);
c2ab57d4 952 return FALSE;
99b89507 953 }
79072805
LW
954 io = GvIO(gv);
955 if (!io) { /* never opened */
1d2dff63 956 if (not_implicit) {
2dd78f96
JH
957 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
958 report_evil_fh(gv, io, PL_op->op_type);
93189314 959 SETERRNO(EBADF,SS_IVCHAN);
1d2dff63 960 }
a687059c
LW
961 return FALSE;
962 }
f2b5be74 963 retval = io_close(io, not_implicit);
517844ec 964 if (not_implicit) {
1193dd27
IZ
965 IoLINES(io) = 0;
966 IoPAGE(io) = 0;
967 IoLINES_LEFT(io) = IoPAGE_LEN(io);
968 }
50952442 969 IoTYPE(io) = IoTYPE_CLOSED;
1193dd27
IZ
970 return retval;
971}
972
973bool
f2b5be74 974Perl_io_close(pTHX_ IO *io, bool not_implicit)
1193dd27
IZ
975{
976 bool retval = FALSE;
1193dd27 977
8990e307 978 if (IoIFP(io)) {
50952442 979 if (IoTYPE(io) == IoTYPE_PIPE) {
4373e329 980 const int status = PerlProc_pclose(IoIFP(io));
f2b5be74 981 if (not_implicit) {
37038d91 982 STATUS_NATIVE_CHILD_SET(status);
e5218da5 983 retval = (STATUS_UNIX == 0);
f2b5be74
GS
984 }
985 else {
986 retval = (status != -1);
987 }
a687059c 988 }
50952442 989 else if (IoTYPE(io) == IoTYPE_STD)
a687059c
LW
990 retval = TRUE;
991 else {
8990e307 992 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
0bcc34c2 993 const bool prev_err = PerlIO_error(IoOFP(io));
e199e3be 994 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
760ac839 995 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4 996 }
e199e3be 997 else {
0bcc34c2 998 const bool prev_err = PerlIO_error(IoIFP(io));
e199e3be
RGS
999 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1000 }
a687059c 1001 }
8990e307 1002 IoOFP(io) = IoIFP(io) = Nullfp;
79072805 1003 }
f2b5be74 1004 else if (not_implicit) {
93189314 1005 SETERRNO(EBADF,SS_IVCHAN);
20408e3c 1006 }
1193dd27 1007
a687059c
LW
1008 return retval;
1009}
1010
1011bool
864dbfa3 1012Perl_do_eof(pTHX_ GV *gv)
a687059c 1013{
0bcc34c2 1014 register IO * const io = GvIO(gv);
a687059c 1015
79072805 1016 if (!io)
a687059c 1017 return TRUE;
041457d9 1018 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
06bcfee8 1019 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
a687059c 1020
8990e307 1021 while (IoIFP(io)) {
760ac839 1022 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
a20bf0c3 1023 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
760ac839
LW
1024 return FALSE; /* this is the most usual case */
1025 }
a687059c 1026
79852593
NC
1027 {
1028 /* getc and ungetc can stomp on errno */
1029 const int saverrno = errno;
1030 const int ch = PerlIO_getc(IoIFP(io));
1031 if (ch != EOF) {
1032 (void)PerlIO_ungetc(IoIFP(io),ch);
1033 errno = saverrno;
1034 return FALSE;
1035 }
505fdf5d 1036 errno = saverrno;
a687059c 1037 }
fab3f3a7 1038
760ac839 1039 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
a20bf0c3
JH
1040 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1041 PerlIO_set_cnt(IoIFP(io),-1);
760ac839 1042 }
533c011a 1043 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
ed2c6b9b 1044 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
a687059c
LW
1045 return TRUE;
1046 }
1047 else
1048 return TRUE; /* normal fp, definitely end of file */
1049 }
1050 return TRUE;
1051}
1052
5ff3f7a4 1053Off_t
864dbfa3 1054Perl_do_tell(pTHX_ GV *gv)
a687059c 1055{
9c5ffd7c 1056 register IO *io = 0;
96e4d5b1 1057 register PerlIO *fp;
a687059c 1058
96e4d5b1 1059 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1060#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
1061 if (PerlIO_eof(fp))
1062 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1063#endif
8903cb82 1064 return PerlIO_tell(fp);
96e4d5b1 1065 }
411caa50
JH
1066 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1067 report_evil_fh(gv, io, PL_op->op_type);
93189314 1068 SETERRNO(EBADF,RMS_IFI);
5ff3f7a4 1069 return (Off_t)-1;
a687059c
LW
1070}
1071
1072bool
864dbfa3 1073Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 1074{
9c5ffd7c 1075 register IO *io = 0;
137443ea 1076 register PerlIO *fp;
a687059c 1077
137443ea 1078 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 1079#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
1080 if (PerlIO_eof(fp))
1081 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 1082#endif
8903cb82 1083 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 1084 }
411caa50
JH
1085 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1086 report_evil_fh(gv, io, PL_op->op_type);
93189314 1087 SETERRNO(EBADF,RMS_IFI);
a687059c
LW
1088 return FALSE;
1089}
1090
97cc44eb 1091Off_t
864dbfa3 1092Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82 1093{
9c5ffd7c 1094 register IO *io = 0;
8903cb82
PP
1095 register PerlIO *fp;
1096
1097 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
3028581b 1098 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
411caa50
JH
1099 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1100 report_evil_fh(gv, io, PL_op->op_type);
93189314 1101 SETERRNO(EBADF,RMS_IFI);
d9b3e12d 1102 return (Off_t)-1;
8903cb82
PP
1103}
1104
6ff81951 1105int
16fe6d59
GS
1106Perl_mode_from_discipline(pTHX_ SV *discp)
1107{
1108 int mode = O_BINARY;
1109 if (discp) {
1110 STRLEN len;
e62f0680 1111 const char *s = SvPV_const(discp,len);
16fe6d59
GS
1112 while (*s) {
1113 if (*s == ':') {
1114 switch (s[1]) {
1115 case 'r':
e963d6d2 1116 if (s[2] == 'a' && s[3] == 'w'
16fe6d59
GS
1117 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1118 {
1119 mode = O_BINARY;
1120 s += 4;
1121 len -= 4;
1122 break;
1123 }
1124 /* FALL THROUGH */
1125 case 'c':
e963d6d2 1126 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
16fe6d59
GS
1127 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1128 {
1129 mode = O_TEXT;
1130 s += 5;
1131 len -= 5;
1132 break;
1133 }
1134 /* FALL THROUGH */
1135 default:
1136 goto fail_discipline;
1137 }
1138 }
1139 else if (isSPACE(*s)) {
1140 ++s;
1141 --len;
1142 }
1143 else {
4373e329 1144 const char *end;
16fe6d59
GS
1145fail_discipline:
1146 end = strchr(s+1, ':');
1147 if (!end)
1148 end = s+len;
60382766 1149#ifndef PERLIO_LAYERS
363c40c4 1150 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
60382766 1151#else
18a33fb5 1152 len -= end-s;
60382766
NIS
1153 s = end;
1154#endif
16fe6d59
GS
1155 }
1156 }
1157 }
1158 return mode;
1159}
1160
58e24eff 1161#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
27da23d5
JH
1162I32
1163my_chsize(int fd, Off_t length)
6eb13c3b 1164{
58e24eff
SH
1165#ifdef F_FREESP
1166 /* code courtesy of William Kucharski */
1167#define HAS_CHSIZE
1168
6eb13c3b 1169 struct flock fl;
c623ac67 1170 Stat_t filebuf;
6eb13c3b 1171
3028581b 1172 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
1173 return -1;
1174
1175 if (filebuf.st_size < length) {
1176
1177 /* extend file length */
1178
3028581b 1179 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
1180 return -1;
1181
1182 /* write a "0" byte */
1183
3028581b 1184 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
1185 return -1;
1186 }
1187 else {
1188 /* truncate length */
1189
1190 fl.l_whence = 0;
1191 fl.l_len = 0;
1192 fl.l_start = length;
a0d0e21e 1193 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
1194
1195 /*
a0d0e21e 1196 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
1197 * fcntl(2), which truncates the file so that it ends at the
1198 * position indicated by fl.l_start.
1199 *
1200 * Will minor miracles never cease?
1201 */
1202
a0d0e21e 1203 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
1204 return -1;
1205
1206 }
6eb13c3b 1207 return 0;
58e24eff 1208#else
27da23d5 1209 Perl_croak_nocontext("truncate not implemented");
a0d0e21e 1210#endif /* F_FREESP */
27da23d5 1211 return -1;
58e24eff
SH
1212}
1213#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
ff8e2863 1214
a687059c 1215bool
864dbfa3 1216Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c 1217{
e1ec3a88 1218 register const char *tmps;
463ee0b2 1219 STRLEN len;
a687059c 1220
79072805
LW
1221 /* assuming fp is checked earlier */
1222 if (!sv)
1223 return TRUE;
79072805
LW
1224 switch (SvTYPE(sv)) {
1225 case SVt_NULL:
411caa50 1226 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 1227 report_uninit(sv);
ff8e2863 1228 return TRUE;
79072805 1229 case SVt_IV:
a0d0e21e 1230 if (SvIOK(sv)) {
5b295bef 1231 SvGETMAGIC(sv);
cf2093f6 1232 if (SvIsUV(sv))
57def98f 1233 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
cf2093f6 1234 else
57def98f 1235 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
760ac839 1236 return !PerlIO_error(fp);
a0d0e21e
LW
1237 }
1238 /* FALL THROUGH */
79072805 1239 default:
7d59b7e4 1240 if (PerlIO_isutf8(fp)) {
f9a63242 1241 if (!SvUTF8(sv))
88632417
JH
1242 sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv),
1243 SV_GMAGIC|SV_UTF8_NO_ENCODING);
7d59b7e4 1244 }
ae798467 1245 else if (DO_UTF8(sv)) {
2da16753 1246 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)
62961d2e 1247 && ckWARN_d(WARN_UTF8))
2da16753 1248 {
9014280d 1249 Perl_warner(aTHX_ packWARN(WARN_UTF8), "Wide character in print");
ae798467
NIS
1250 }
1251 }
5c144d81 1252 tmps = SvPV_const(sv, len);
79072805 1253 break;
ff8e2863 1254 }
94e4c244
JH
1255 /* To detect whether the process is about to overstep its
1256 * filesize limit we would need getrlimit(). We could then
1257 * also transparently raise the limit with setrlimit() --
1258 * but only until the system hard limit/the filesystem limit,
c5dd3cdd
JH
1259 * at which we would get EPERM. Note that when using buffered
1260 * io the write failure can be delayed until the flush/close. --jhi */
a21ac455 1261 if (len && (PerlIO_write(fp,tmps,len) == 0))
a687059c 1262 return FALSE;
760ac839 1263 return !PerlIO_error(fp);
a687059c
LW
1264}
1265
79072805 1266I32
cea2e8a9 1267Perl_my_stat(pTHX)
a687059c 1268{
39644a26 1269 dSP;
79072805 1270 IO *io;
2dd78f96 1271 GV* gv;
79072805 1272
533c011a 1273 if (PL_op->op_flags & OPf_REF) {
924508f0 1274 EXTEND(SP,1);
2dd78f96 1275 gv = cGVOP_gv;
748a9306 1276 do_fstat:
2dd78f96 1277 io = GvIO(gv);
8990e307 1278 if (io && IoIFP(io)) {
2dd78f96 1279 PL_statgv = gv;
c69006e4 1280 sv_setpvn(PL_statname,"", 0);
3280af22
NIS
1281 PL_laststype = OP_STAT;
1282 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
a687059c
LW
1283 }
1284 else {
2dd78f96 1285 if (gv == PL_defgv)
3280af22 1286 return PL_laststatval;
2dd78f96
JH
1287 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1288 report_evil_fh(gv, io, PL_op->op_type);
3280af22 1289 PL_statgv = Nullgv;
c69006e4 1290 sv_setpvn(PL_statname,"", 0);
3280af22 1291 return (PL_laststatval = -1);
a687059c
LW
1292 }
1293 }
fbb0b3b3
RGS
1294 else if (PL_op->op_private & OPpFT_STACKED) {
1295 return PL_laststatval;
1296 }
a687059c 1297 else {
0bcc34c2 1298 SV* const sv = POPs;
4373e329 1299 const char *s;
4ecd490c 1300 STRLEN len;
79072805 1301 PUTBACK;
748a9306 1302 if (SvTYPE(sv) == SVt_PVGV) {
2dd78f96 1303 gv = (GV*)sv;
748a9306
LW
1304 goto do_fstat;
1305 }
1306 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
2dd78f96 1307 gv = (GV*)SvRV(sv);
748a9306
LW
1308 goto do_fstat;
1309 }
1310
5c144d81 1311 s = SvPV_const(sv, len);
3280af22 1312 PL_statgv = Nullgv;
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{
0bd48802 1327 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
39644a26 1328 dSP;
79072805 1329 SV *sv;
533c011a 1330 if (PL_op->op_flags & OPf_REF) {
924508f0 1331 EXTEND(SP,1);
638eceb6 1332 if (cGVOP_gv == PL_defgv) {
3280af22 1333 if (PL_laststype != OP_LSTAT)
fbb0b3b3 1334 Perl_croak(aTHX_ no_prev_lstat);
3280af22 1335 return PL_laststatval;
fe14fcc3 1336 }
5d3e98de 1337 if (ckWARN(WARN_IO)) {
9014280d 1338 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1339 GvENAME(cGVOP_gv));
1340 return (PL_laststatval = -1);
1341 }
fe14fcc3 1342 }
041457d9
DM
1343 else if (PL_laststype != OP_LSTAT
1344 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
fbb0b3b3 1345 Perl_croak(aTHX_ no_prev_lstat);
c623bd54 1346
3280af22
NIS
1347 PL_laststype = OP_LSTAT;
1348 PL_statgv = Nullgv;
79072805
LW
1349 sv = POPs;
1350 PUTBACK;
5d3e98de 1351 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
9014280d 1352 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
5d3e98de
RGS
1353 GvENAME((GV*) SvRV(sv)));
1354 return (PL_laststatval = -1);
1355 }
4373e329 1356 /* XXX Do really need to be calling SvPV() all these times? */
e62f0680
NC
1357 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1358 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1359 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
9014280d 1360 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
3280af22 1361 return PL_laststatval;
c623bd54
LW
1362}
1363
d5a9bfb0 1364bool
2aa1486d
GS
1365Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1366 int fd, int do_report)
d5a9bfb0 1367{
27da23d5 1368 dVAR;
a0fd4948 1369#if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__)
cd39f2b6
JH
1370 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1371#else
79072805 1372 if (sp > mark) {
c3c5fad7 1373 char **a;
890ce7af 1374 const char *tmps = Nullch;
c3c5fad7
DM
1375 Newx(PL_Argv, sp - mark + 1, char*);
1376 a = PL_Argv;
890ce7af 1377
79072805
LW
1378 while (++mark <= sp) {
1379 if (*mark)
e62f0680 1380 *a++ = (char*)SvPV_nolen_const(*mark);
a687059c
LW
1381 else
1382 *a++ = "";
1383 }
1384 *a = Nullch;
91b2752f 1385 if (really)
e62f0680 1386 tmps = SvPV_nolen_const(really);
91b2752f
RG
1387 if ((!really && *PL_Argv[0] != '/') ||
1388 (really && *tmps != '/')) /* will execvp use PATH? */
79072805 1389 TAINT_ENV(); /* testing IFS here is overkill, probably */
b35112e7 1390 PERL_FPU_PRE_EXEC
91b2752f 1391 if (really && *tmps)
b4748376 1392 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
a687059c 1393 else
b4748376 1394 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
b35112e7 1395 PERL_FPU_POST_EXEC
599cee73 1396 if (ckWARN(WARN_EXEC))
9014280d 1397 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
91b2752f 1398 (really ? tmps : PL_Argv[0]), Strerror(errno));
d5a9bfb0 1399 if (do_report) {
79852593 1400 const int e = errno;
d5a9bfb0
IZ
1401
1402 PerlLIO_write(fd, (void*)&e, sizeof(int));
1403 PerlLIO_close(fd);
1404 }
a687059c 1405 }
bee1dbe2 1406 do_execfree();
cd39f2b6 1407#endif
a687059c
LW
1408 return FALSE;
1409}
1410
fe14fcc3 1411void
864dbfa3 1412Perl_do_execfree(pTHX)
ff8e2863 1413{
43c5f42d
NC
1414 Safefree(PL_Argv);
1415 PL_Argv = Null(char **);
1416 Safefree(PL_Cmd);
1417 PL_Cmd = Nullch;
ff8e2863
LW
1418}
1419
9555a685 1420#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
e446cec8
IZ
1421
1422bool
2fbb330f 1423Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
e446cec8 1424{
27da23d5 1425 dVAR;
a687059c
LW
1426 register char **a;
1427 register char *s;
2fbb330f 1428 char *cmd;
2fbb330f
JM
1429
1430 /* Make a copy so we can change it */
0bcc34c2 1431 const int cmdlen = strlen(incmd);
2fbb330f
JM
1432 Newx(cmd, cmdlen+1, char);
1433 strncpy(cmd, incmd, cmdlen);
1434 cmd[cmdlen] = 0;
a687059c 1435
748a9306
LW
1436 while (*cmd && isSPACE(*cmd))
1437 cmd++;
1438
a687059c
LW
1439 /* save an extra exec if possible */
1440
bf38876a 1441#ifdef CSH
d05c1ba0 1442 {
0c19750d 1443 char flags[PERL_FLAGS_MAX];
d05c1ba0
JH
1444 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1445 strnEQ(cmd+PL_cshlen," -c",3)) {
0c19750d
SP
1446#ifdef HAS_STRLCPY
1447 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1448#else
d05c1ba0 1449 strcpy(flags,"-c");
0c19750d 1450#endif
d05c1ba0
JH
1451 s = cmd+PL_cshlen+3;
1452 if (*s == 'f') {
1453 s++;
0c19750d
SP
1454#ifdef HAS_STRLCPY
1455 strlcat(flags, "f", PERL_FLAGS_MAX);
1456#else
d05c1ba0 1457 strcat(flags,"f");
0c19750d 1458#endif
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
d05c1ba0 1472 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
b35112e7 1473 PERL_FPU_POST_EXEC
d05c1ba0 1474 *s = '\'';
2fbb330f 1475 Safefree(cmd);
d05c1ba0
JH
1476 return FALSE;
1477 }
1478 }
a687059c
LW
1479 }
1480 }
bf38876a 1481#endif /* CSH */
a687059c
LW
1482
1483 /* see if there are shell metacharacters in it */
1484
748a9306
LW
1485 if (*cmd == '.' && isSPACE(cmd[1]))
1486 goto doshell;
1487
1488 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1489 goto doshell;
1490
c170e444 1491 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
63f2c1e1
LW
1492 if (*s == '=')
1493 goto doshell;
748a9306 1494
a687059c 1495 for (s = cmd; *s; s++) {
d05c1ba0
JH
1496 if (*s != ' ' && !isALPHA(*s) &&
1497 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1498 if (*s == '\n' && !s[1]) {
1499 *s = '\0';
1500 break;
1501 }
603a98b0
IZ
1502 /* handle the 2>&1 construct at the end */
1503 if (*s == '>' && s[1] == '&' && s[2] == '1'
1504 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1505 && (!s[3] || isSPACE(s[3])))
1506 {
6867be6d 1507 const char *t = s + 3;
603a98b0
IZ
1508
1509 while (*t && isSPACE(*t))
1510 ++t;
943bbd07 1511 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
603a98b0
IZ
1512 s[-2] = '\0';
1513 break;
1514 }
1515 }
a687059c 1516 doshell:
b35112e7 1517 PERL_FPU_PRE_EXEC
3280af22 1518 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
b35112e7 1519 PERL_FPU_POST_EXEC
2fbb330f 1520 Safefree(cmd);
a687059c
LW
1521 return FALSE;
1522 }
1523 }
748a9306 1524
a02a5408 1525 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
3280af22
NIS
1526 PL_Cmd = savepvn(cmd, s-cmd);
1527 a = PL_Argv;
1528 for (s = PL_Cmd; *s;) {
99b89507 1529 while (*s && isSPACE(*s)) s++;
a687059c
LW
1530 if (*s)
1531 *(a++) = s;
99b89507 1532 while (*s && !isSPACE(*s)) s++;
a687059c
LW
1533 if (*s)
1534 *s++ = '\0';
1535 }
1536 *a = Nullch;
3280af22 1537 if (PL_Argv[0]) {
b35112e7 1538 PERL_FPU_PRE_EXEC
3280af22 1539 PerlProc_execvp(PL_Argv[0],PL_Argv);
b35112e7 1540 PERL_FPU_POST_EXEC
b1248f16 1541 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1542 do_execfree();
a687059c 1543 goto doshell;
b1248f16 1544 }
d008e5eb 1545 {
d008e5eb 1546 if (ckWARN(WARN_EXEC))
9014280d 1547 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
d008e5eb 1548 PL_Argv[0], Strerror(errno));
e446cec8 1549 if (do_report) {
79852593 1550 const int e = errno;
e446cec8
IZ
1551 PerlLIO_write(fd, (void*)&e, sizeof(int));
1552 PerlLIO_close(fd);
1553 }
d008e5eb 1554 }
a687059c 1555 }
ff8e2863 1556 do_execfree();
2fbb330f 1557 Safefree(cmd);
a687059c
LW
1558 return FALSE;
1559}
1560
6890e559 1561#endif /* OS2 || WIN32 */
760ac839 1562
79072805 1563I32
864dbfa3 1564Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1565{
79072805 1566 register I32 val;
79072805 1567 register I32 tot = 0;
4634a855 1568 const char *const what = PL_op_name[type];
5c144d81 1569 const char *s;
890ce7af 1570 SV ** const oldmark = mark;
a687059c 1571
1444765e
NC
1572 /* Doing this ahead of the switch statement preserves the old behaviour,
1573 where attempting to use kill as a taint test test would fail on
1574 platforms where kill was not defined. */
1575#ifndef HAS_KILL
1576 if (type == OP_KILL)
4634a855 1577 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1578#endif
1579#ifndef HAS_CHOWN
1580 if (type == OP_CHOWN)
4634a855 1581 Perl_die(aTHX_ PL_no_func, what);
1444765e
NC
1582#endif
1583
1584
20408e3c 1585#define APPLY_TAINT_PROPER() \
3280af22 1586 STMT_START { \
17406bd6 1587 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1588 } STMT_END
20408e3c
GS
1589
1590 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1591 if (PL_tainting) {
463ee0b2 1592 while (++mark <= sp) {
bbce6d69
PP
1593 if (SvTAINTED(*mark)) {
1594 TAINT;
1595 break;
1596 }
463ee0b2
LW
1597 }
1598 mark = oldmark;
1599 }
a687059c 1600 switch (type) {
79072805 1601 case OP_CHMOD:
20408e3c 1602 APPLY_TAINT_PROPER();
79072805 1603 if (++mark <= sp) {
463ee0b2 1604 val = SvIVx(*mark);
20408e3c
GS
1605 APPLY_TAINT_PROPER();
1606 tot = sp - mark;
79072805 1607 while (++mark <= sp) {
c4aca7d0
GA
1608 GV* gv;
1609 if (SvTYPE(*mark) == SVt_PVGV) {
1610 gv = (GV*)*mark;
1611 do_fchmod:
1612 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1613#ifdef HAS_FCHMOD
1614 APPLY_TAINT_PROPER();
1615 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1616 tot--;
1617#else
b9c6780e 1618 Perl_die(aTHX_ PL_no_func, "fchmod");
c4aca7d0
GA
1619#endif
1620 }
1621 else {
1622 tot--;
1623 }
1624 }
1625 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1626 gv = (GV*)SvRV(*mark);
1627 goto do_fchmod;
1628 }
1629 else {
1630 const char *name = SvPV_nolen_const(*mark);
1631 APPLY_TAINT_PROPER();
1632 if (PerlLIO_chmod(name, val))
1633 tot--;
1634 }
a687059c
LW
1635 }
1636 }
1637 break;
fe14fcc3 1638#ifdef HAS_CHOWN
79072805 1639 case OP_CHOWN:
20408e3c 1640 APPLY_TAINT_PROPER();
79072805 1641 if (sp - mark > 2) {
6867be6d 1642 register I32 val2;
463ee0b2
LW
1643 val = SvIVx(*++mark);
1644 val2 = SvIVx(*++mark);
20408e3c 1645 APPLY_TAINT_PROPER();
a0d0e21e 1646 tot = sp - mark;
79072805 1647 while (++mark <= sp) {
c4aca7d0
GA
1648 GV* gv;
1649 if (SvTYPE(*mark) == SVt_PVGV) {
1650 gv = (GV*)*mark;
1651 do_fchown:
1652 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1653#ifdef HAS_FCHOWN
1654 APPLY_TAINT_PROPER();
1655 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1656 tot--;
1657#else
b9c6780e 1658 Perl_die(aTHX_ PL_no_func, "fchown");
c4aca7d0
GA
1659#endif
1660 }
1661 else {
1662 tot--;
1663 }
1664 }
1665 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1666 gv = (GV*)SvRV(*mark);
1667 goto do_fchown;
1668 }
1669 else {
1670 const char *name = SvPV_nolen_const(*mark);
1671 APPLY_TAINT_PROPER();
1672 if (PerlLIO_chown(name, val, val2))
1673 tot--;
1674 }
a687059c
LW
1675 }
1676 }
1677 break;
b1248f16 1678#endif
a1d180c4 1679/*
dd64f1c3
AD
1680XXX Should we make lchown() directly available from perl?
1681For now, we'll let Configure test for HAS_LCHOWN, but do
1682nothing in the core.
1683 --AD 5/1998
1684*/
fe14fcc3 1685#ifdef HAS_KILL
79072805 1686 case OP_KILL:
20408e3c 1687 APPLY_TAINT_PROPER();
55497cff
PP
1688 if (mark == sp)
1689 break;
e62f0680 1690 s = SvPVx_nolen_const(*++mark);
e02bfb16 1691 if (isALPHA(*s)) {
79072805
LW
1692 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1693 s += 3;
e02bfb16 1694 if ((val = whichsig(s)) < 0)
cea2e8a9 1695 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1696 }
1697 else
463ee0b2 1698 val = SvIVx(*mark);
20408e3c
GS
1699 APPLY_TAINT_PROPER();
1700 tot = sp - mark;
3595fcef
PP
1701#ifdef VMS
1702 /* kill() doesn't do process groups (job trees?) under VMS */
1703 if (val < 0) val = -val;
1704 if (val == SIGKILL) {
1705# include <starlet.h>
1706 /* Use native sys$delprc() to insure that target process is
1707 * deleted; supervisor-mode images don't pay attention to
1708 * CRTL's emulation of Unix-style signals and kill()
1709 */
1710 while (++mark <= sp) {
1711 I32 proc = SvIVx(*mark);
1712 register unsigned long int __vmssts;
20408e3c 1713 APPLY_TAINT_PROPER();
3595fcef
PP
1714 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1715 tot--;
1716 switch (__vmssts) {
1717 case SS$_NONEXPR:
1718 case SS$_NOSUCHNODE:
1719 SETERRNO(ESRCH,__vmssts);
1720 break;
1721 case SS$_NOPRIV:
1722 SETERRNO(EPERM,__vmssts);
1723 break;
1724 default:
1725 SETERRNO(EVMSERR,__vmssts);
1726 }
1727 }
1728 }
1729 break;
1730 }
1731#endif
79072805
LW
1732 if (val < 0) {
1733 val = -val;
1734 while (++mark <= sp) {
0bcc34c2 1735 const I32 proc = SvIVx(*mark);
20408e3c 1736 APPLY_TAINT_PROPER();
fe14fcc3 1737#ifdef HAS_KILLPG
3028581b 1738 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1739#else
3028581b 1740 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1741#endif
79072805 1742 tot--;
a687059c 1743 }
79072805
LW
1744 }
1745 else {
1746 while (++mark <= sp) {
0bcc34c2 1747 const I32 proc = SvIVx(*mark);
20408e3c
GS
1748 APPLY_TAINT_PROPER();
1749 if (PerlProc_kill(proc, val))
79072805 1750 tot--;
a687059c
LW
1751 }
1752 }
1753 break;
b1248f16 1754#endif
79072805 1755 case OP_UNLINK:
20408e3c 1756 APPLY_TAINT_PROPER();
79072805
LW
1757 tot = sp - mark;
1758 while (++mark <= sp) {
e62f0680 1759 s = SvPV_nolen_const(*mark);
20408e3c 1760 APPLY_TAINT_PROPER();
3280af22 1761 if (PL_euid || PL_unsafe) {
b8ffc8df 1762 if (UNLINK(s))
a687059c
LW
1763 tot--;
1764 }
1765 else { /* don't let root wipe out directories without -U */
3280af22 1766 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1767 tot--;
1768 else {
b8ffc8df 1769 if (UNLINK(s))
a687059c
LW
1770 tot--;
1771 }
1772 }
1773 }
1774 break;
e96b369d 1775#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
79072805 1776 case OP_UTIME:
20408e3c 1777 APPLY_TAINT_PROPER();
79072805 1778 if (sp - mark > 2) {
e96b369d
GA
1779#if defined(HAS_FUTIMES)
1780 struct timeval utbuf[2];
1781 void *utbufp = utbuf;
1782#elif defined(I_UTIME) || defined(VMS)
663a0e37 1783 struct utimbuf utbuf;
07409e01 1784 struct utimbuf *utbufp = &utbuf;
663a0e37 1785#else
a687059c 1786 struct {
dd2821f6
GS
1787 Time_t actime;
1788 Time_t modtime;
a687059c 1789 } utbuf;
07409e01 1790 void *utbufp = &utbuf;
663a0e37 1791#endif
a687059c 1792
0bcc34c2
AL
1793 SV* const accessed = *++mark;
1794 SV* const modified = *++mark;
c6f7b413 1795
6ec06612
SB
1796 /* Be like C, and if both times are undefined, let the C
1797 * library figure out what to do. This usually means
1798 * "current time". */
c6f7b413
RS
1799
1800 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
6ec06612
SB
1801 utbufp = NULL;
1802 else {
1803 Zero(&utbuf, sizeof utbuf, char);
e96b369d
GA
1804#ifdef HAS_FUTIMES
1805 utbuf[0].tv_sec = (long)SvIVx(accessed); /* time accessed */
1806 utbuf[0].tv_usec = 0;
1807 utbuf[1].tv_sec = (long)SvIVx(modified); /* time modified */
1808 utbuf[1].tv_usec = 0;
1809#elif defined(BIG_TIME)
6ec06612
SB
1810 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1811 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
517844ec 1812#else
6ec06612
SB
1813 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1814 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
517844ec 1815#endif
6ec06612 1816 }
4373e329 1817 APPLY_TAINT_PROPER();
79072805
LW
1818 tot = sp - mark;
1819 while (++mark <= sp) {
e96b369d
GA
1820 GV* gv;
1821 if (SvTYPE(*mark) == SVt_PVGV) {
1822 gv = (GV*)*mark;
1823 do_futimes:
1824 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1825#ifdef HAS_FUTIMES
1826 APPLY_TAINT_PROPER();
1827 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), utbufp))
1828 tot--;
1829#else
1830 Perl_die(aTHX_ PL_no_func, "futimes");
1831#endif
1832 }
1833 else {
1834 tot--;
1835 }
1836 }
1837 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1838 gv = (GV*)SvRV(*mark);
1839 goto do_futimes;
1840 }
1841 else {
0bcc34c2 1842 const char * const name = SvPV_nolen_const(*mark);
e96b369d
GA
1843 APPLY_TAINT_PROPER();
1844#ifdef HAS_FUTIMES
1845 if (utimes(name, utbufp))
1846#else
1847 if (PerlLIO_utime(name, utbufp))
1848#endif
1849 tot--;
1850 }
1851
a687059c 1852 }
a687059c
LW
1853 }
1854 else
79072805 1855 tot = 0;
a687059c 1856 break;
a0d0e21e 1857#endif
a687059c
LW
1858 }
1859 return tot;
20408e3c 1860
20408e3c 1861#undef APPLY_TAINT_PROPER
a687059c
LW
1862}
1863
1864/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1865#ifndef VMS /* VMS' cando is in vms.c */
7f4774ae 1866bool
ae1951c1
NC
1867Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1868/* effective is a flag, true for EUID, or for checking if the effective gid
1869 * is in the list of groups returned from getgroups().
1870 */
a687059c 1871{
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
3280af22 1928 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1929 return TRUE;
fe14fcc3 1930#ifdef HAS_GETGROUPS
a687059c
LW
1931#ifndef NGROUPS
1932#define NGROUPS 32
1933#endif
1934 {
a0d0e21e 1935 Groups_t gary[NGROUPS];
79072805 1936 I32 anum;
a687059c
LW
1937
1938 anum = getgroups(NGROUPS,gary);
1939 while (--anum >= 0)
1940 if (gary[anum] == testgid)
1941 return TRUE;
1942 }
1943#endif
1944 return FALSE;
cd39f2b6 1945#endif
a687059c 1946}
c2ab57d4 1947
fe14fcc3 1948#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1949
79072805 1950I32
864dbfa3 1951Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1952{
0bcc34c2 1953 const key_t key = (key_t)SvNVx(*++mark);
6867be6d
AL
1954 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1955 const I32 flags = SvIVx(*++mark);
1956 (void)sp;
c2ab57d4 1957
748a9306 1958 SETERRNO(0,0);
c2ab57d4
LW
1959 switch (optype)
1960 {
fe14fcc3 1961#ifdef HAS_MSG
79072805 1962 case OP_MSGGET:
c2ab57d4 1963 return msgget(key, flags);
e5d73d77 1964#endif
fe14fcc3 1965#ifdef HAS_SEM
79072805 1966 case OP_SEMGET:
c2ab57d4 1967 return semget(key, n, flags);
e5d73d77 1968#endif
fe14fcc3 1969#ifdef HAS_SHM
79072805 1970 case OP_SHMGET:
c2ab57d4 1971 return shmget(key, n, flags);
e5d73d77 1972#endif
fe14fcc3 1973#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1974 default:
cea2e8a9 1975 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1976#endif
c2ab57d4
LW
1977 }
1978 return -1; /* should never happen */
1979}
1980
79072805 1981I32
864dbfa3 1982Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1983{
c2ab57d4 1984 char *a;
a0d0e21e 1985 I32 ret = -1;
6867be6d
AL
1986 const I32 id = SvIVx(*++mark);
1987 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1988 const I32 cmd = SvIVx(*++mark);
0bcc34c2
AL
1989 SV * const astr = *++mark;
1990 STRLEN infosize = 0;
1991 I32 getinfo = (cmd == IPC_STAT);
c2ab57d4 1992
0bcc34c2 1993 PERL_UNUSED_ARG(sp);
c2ab57d4
LW
1994
1995 switch (optype)
1996 {
fe14fcc3 1997#ifdef HAS_MSG
79072805 1998 case OP_MSGCTL:
c2ab57d4
LW
1999 if (cmd == IPC_STAT || cmd == IPC_SET)
2000 infosize = sizeof(struct msqid_ds);
2001 break;
e5d73d77 2002#endif
fe14fcc3 2003#ifdef HAS_SHM
79072805 2004 case OP_SHMCTL:
c2ab57d4
LW
2005 if (cmd == IPC_STAT || cmd == IPC_SET)
2006 infosize = sizeof(struct shmid_ds);
2007 break;
e5d73d77 2008#endif
fe14fcc3 2009#ifdef HAS_SEM
79072805 2010 case OP_SEMCTL:
39398f3f 2011#ifdef Semctl
c2ab57d4
LW
2012 if (cmd == IPC_STAT || cmd == IPC_SET)
2013 infosize = sizeof(struct semid_ds);
2014 else if (cmd == GETALL || cmd == SETALL)
2015 {
8e591e46 2016 struct semid_ds semds;
bd89102f 2017 union semun semun;
e6f0bdd6
GS
2018#ifdef EXTRA_F_IN_SEMUN_BUF
2019 semun.buff = &semds;
2020#else
84902520 2021 semun.buf = &semds;
e6f0bdd6 2022#endif
c2ab57d4 2023 getinfo = (cmd == GETALL);
9b89d93d
GB
2024 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2025 return -1;
6e21c824
LW
2026 infosize = semds.sem_nsems * sizeof(short);
2027 /* "short" is technically wrong but much more portable
2028 than guessing about u_?short(_t)? */
c2ab57d4 2029 }
39398f3f 2030#else
cea2e8a9 2031 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2032#endif
c2ab57d4 2033 break;
e5d73d77 2034#endif
fe14fcc3 2035#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 2036 default:
cea2e8a9 2037 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 2038#endif
c2ab57d4
LW
2039 }
2040
2041 if (infosize)
2042 {
2043 if (getinfo)
2044 {
93524f2b 2045 SvPV_force_nolen(astr);
a0d0e21e 2046 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
2047 }
2048 else
2049 {
93524f2b 2050 STRLEN len;
463ee0b2
LW
2051 a = SvPV(astr, len);
2052 if (len != infosize)
cea2e8a9 2053 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
2054 PL_op_desc[optype],
2055 (unsigned long)len,
2056 (long)infosize);
c2ab57d4
LW
2057 }
2058 }
2059 else
2060 {
0bcc34c2 2061 const IV i = SvIV(astr);
56431972 2062 a = INT2PTR(char *,i); /* ouch */
c2ab57d4 2063 }
748a9306 2064 SETERRNO(0,0);
c2ab57d4
LW
2065 switch (optype)
2066 {
fe14fcc3 2067#ifdef HAS_MSG
79072805 2068 case OP_MSGCTL:
bee1dbe2 2069 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 2070 break;
e5d73d77 2071#endif
fe14fcc3 2072#ifdef HAS_SEM
bd89102f 2073 case OP_SEMCTL: {
39398f3f 2074#ifdef Semctl
bd89102f
AD
2075 union semun unsemds;
2076
e6f0bdd6
GS
2077#ifdef EXTRA_F_IN_SEMUN_BUF
2078 unsemds.buff = (struct semid_ds *)a;
2079#else
bd89102f 2080 unsemds.buf = (struct semid_ds *)a;
e6f0bdd6 2081#endif
bd89102f 2082 ret = Semctl(id, n, cmd, unsemds);
39398f3f 2083#else
cea2e8a9 2084 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 2085#endif
bd89102f 2086 }
c2ab57d4 2087 break;
e5d73d77 2088#endif
fe14fcc3 2089#ifdef HAS_SHM
79072805 2090 case OP_SHMCTL:
bee1dbe2 2091 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 2092 break;
e5d73d77 2093#endif
c2ab57d4
LW
2094 }
2095 if (getinfo && ret >= 0) {
79072805
LW
2096 SvCUR_set(astr, infosize);
2097 *SvEND(astr) = '\0';
a0d0e21e 2098 SvSETMAGIC(astr);
c2ab57d4
LW
2099 }
2100 return ret;
2101}
2102
79072805 2103I32
864dbfa3 2104Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 2105{
fe14fcc3 2106#ifdef HAS_MSG
463ee0b2 2107 STRLEN len;
6867be6d 2108 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2109 SV * const mstr = *++mark;
2110 const I32 flags = SvIVx(*++mark);
2111 const char * const mbuf = SvPV_const(mstr, len);
2112 const I32 msize = len - sizeof(long);
2113
890ce7af 2114 PERL_UNUSED_ARG(sp);
c2ab57d4 2115
0bcc34c2 2116 if (msize < 0)
cea2e8a9 2117 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 2118 SETERRNO(0,0);
bee1dbe2 2119 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 2120#else
cea2e8a9 2121 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 2122#endif
c2ab57d4
LW
2123}
2124
79072805 2125I32
864dbfa3 2126Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 2127{
fe14fcc3 2128#ifdef HAS_MSG
c2ab57d4
LW
2129 char *mbuf;
2130 long mtype;
6867be6d 2131 I32 msize, flags, ret;
6867be6d 2132 const I32 id = SvIVx(*++mark);
0bcc34c2 2133 SV * const mstr = *++mark;
890ce7af 2134 PERL_UNUSED_ARG(sp);
79072805 2135
c2e66d9e
GS
2136 /* suppress warning when reading into undef var --jhi */
2137 if (! SvOK(mstr))
2138 sv_setpvn(mstr, "", 0);
463ee0b2
LW
2139 msize = SvIVx(*++mark);
2140 mtype = (long)SvIVx(*++mark);
2141 flags = SvIVx(*++mark);
93524f2b 2142 SvPV_force_nolen(mstr);
a0d0e21e 2143 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
a1d180c4 2144
748a9306 2145 SETERRNO(0,0);
bee1dbe2 2146 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 2147 if (ret >= 0) {
79072805
LW
2148 SvCUR_set(mstr, sizeof(long)+ret);
2149 *SvEND(mstr) = '\0';
41d6edb2
JH
2150#ifndef INCOMPLETE_TAINTS
2151 /* who knows who has been playing with this message? */
2152 SvTAINTED_on(mstr);
2153#endif
c2ab57d4
LW
2154 }
2155 return ret;
e5d73d77 2156#else
cea2e8a9 2157 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 2158#endif
c2ab57d4
LW
2159}
2160
79072805 2161I32
864dbfa3 2162Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 2163{
fe14fcc3 2164#ifdef HAS_SEM
463ee0b2 2165 STRLEN opsize;
6867be6d 2166 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2167 SV * const opstr = *++mark;
2168 const char * const opbuf = SvPV_const(opstr, opsize);
890ce7af 2169 PERL_UNUSED_ARG(sp);
c2ab57d4 2170
248ff010
NC
2171 if (opsize < 3 * SHORTSIZE
2172 || (opsize % (3 * SHORTSIZE))) {
93189314 2173 SETERRNO(EINVAL,LIB_INVARG);
c2ab57d4
LW
2174 return -1;
2175 }
748a9306 2176 SETERRNO(0,0);
248ff010
NC
2177 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2178 {
6867be6d 2179 const int nsops = opsize / (3 * sizeof (short));
248ff010 2180 int i = nsops;
0bcc34c2 2181 short * const ops = (short *) opbuf;
248ff010
NC
2182 short *o = ops;
2183 struct sembuf *temps, *t;
2184 I32 result;
2185
a02a5408 2186 Newx (temps, nsops, struct sembuf);
248ff010
NC
2187 t = temps;
2188 while (i--) {
2189 t->sem_num = *o++;
2190 t->sem_op = *o++;
2191 t->sem_flg = *o++;
2192 t++;
2193 }
2194 result = semop(id, temps, nsops);
2195 t = temps;
2196 o = ops;
2197 i = nsops;
2198 while (i--) {
2199 *o++ = t->sem_num;
2200 *o++ = t->sem_op;
2201 *o++ = t->sem_flg;
2202 t++;
2203 }
2204 Safefree(temps);
2205 return result;
2206 }
e5d73d77 2207#else
cea2e8a9 2208 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 2209#endif
c2ab57d4
LW
2210}
2211
79072805 2212I32
864dbfa3 2213Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 2214{
fe14fcc3 2215#ifdef HAS_SHM
4373e329 2216 char *shm;
c2ab57d4 2217 struct shmid_ds shmds;
6867be6d 2218 const I32 id = SvIVx(*++mark);
0bcc34c2
AL
2219 SV * const mstr = *++mark;
2220 const I32 mpos = SvIVx(*++mark);
2221 const I32 msize = SvIVx(*++mark);
890ce7af 2222 PERL_UNUSED_ARG(sp);
c2ab57d4 2223
748a9306 2224 SETERRNO(0,0);
c2ab57d4
LW
2225 if (shmctl(id, IPC_STAT, &shmds) == -1)
2226 return -1;
2227 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
93189314 2228 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
2229 return -1;
2230 }
8ac85365 2231 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
2232 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2233 return -1;
79072805 2234 if (optype == OP_SHMREAD) {
4373e329 2235 const char *mbuf;
9f538c04
GS
2236 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2237 if (! SvOK(mstr))
2238 sv_setpvn(mstr, "", 0);
93524f2b 2239 SvPV_force_nolen(mstr);
a0d0e21e
LW
2240 mbuf = SvGROW(mstr, msize+1);
2241
bee1dbe2 2242 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
2243 SvCUR_set(mstr, msize);
2244 *SvEND(mstr) = '\0';
a0d0e21e 2245 SvSETMAGIC(mstr);
d929ce6f
JH
2246#ifndef INCOMPLETE_TAINTS
2247 /* who knows who has been playing with this shared memory? */
2248 SvTAINTED_on(mstr);
2249#endif
c2ab57d4
LW
2250 }
2251 else {
79072805 2252 I32 n;
93524f2b 2253 STRLEN len;
c2ab57d4 2254
93524f2b 2255 const char *mbuf = SvPV_const(mstr, len);
463ee0b2 2256 if ((n = len) > msize)
c2ab57d4 2257 n = msize;
bee1dbe2 2258 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 2259 if (n < msize)
bee1dbe2 2260 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
2261 }
2262 return shmdt(shm);
e5d73d77 2263#else
cea2e8a9 2264 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 2265#endif
c2ab57d4
LW
2266}
2267
fe14fcc3 2268#endif /* SYSV IPC */
4e35701f 2269
0d44d22b 2270/*
ccfc67b7
JH
2271=head1 IO Functions
2272
0d44d22b
NC
2273=for apidoc start_glob
2274
2275Function called by C<do_readline> to spawn a glob (or do the glob inside
2276perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
210b36aa 2277this glob starter is only used by miniperl during the build process.
0d44d22b 2278Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
fab3f3a7 2279
0d44d22b
NC
2280=cut
2281*/
2282
2283PerlIO *
2284Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2285{
27da23d5 2286 dVAR;
2d03de9c 2287 SV * const tmpcmd = NEWSV(55, 0);
0d44d22b
NC
2288 PerlIO *fp;
2289 ENTER;
2290 SAVEFREESV(tmpcmd);
2291#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2292 /* since spawning off a process is a real performance hit */
2293 {
2294#include <descrip.h>
2295#include <lib$routines.h>
2296#include <nam.h>
2297#include <rmsdef.h>
2298 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2299 char vmsspec[NAM$C_MAXRSS+1];
890ce7af
AL
2300 char * const rstr = rslt + sizeof(unsigned short int);
2301 char *begin, *end, *cp;
0d44d22b
NC
2302 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2303 PerlIO *tmpfp;
2304 STRLEN i;
2305 struct dsc$descriptor_s wilddsc
2306 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2307 struct dsc$descriptor_vs rsdsc
2308 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2309 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2310
2311 /* We could find out if there's an explicit dev/dir or version
2312 by peeking into lib$find_file's internal context at
2313 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2314 but that's unsupported, so I don't want to do it now and
2315 have it bite someone in the future. */
0d44d22b
NC
2316 cp = SvPV(tmpglob,i);
2317 for (; i; i--) {
2318 if (cp[i] == ';') hasver = 1;
2319 if (cp[i] == '.') {
2320 if (sts) hasver = 1;
2321 else sts = 1;
2322 }
2323 if (cp[i] == '/') {
2324 hasdir = isunix = 1;
2325 break;
2326 }
2327 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2328 hasdir = 1;
2329 break;
2330 }
2331 }
a15cef0c 2332 if ((tmpfp = PerlIO_tmpfile()) != NULL) {
0d44d22b 2333 Stat_t st;
95a20fc0 2334 if (!PerlLIO_stat(SvPVX_const(tmpglob),&st) && S_ISDIR(st.st_mode))
94a11853
CB
2335 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2336 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
0d44d22b 2337 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
a3987cb8
JH
2338 for (cp=wilddsc.dsc$a_pointer; ok && cp && *cp; cp++)
2339 if (*cp == '?') *cp = '%'; /* VMS style single-char wildcard */
0d44d22b
NC
2340 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2341 &dfltdsc,NULL,NULL,NULL))&1)) {
3ce6b0cb
CB
2342 /* with varying string, 1st word of buffer contains result length */
2343 end = rstr + *((unsigned short int*)rslt);
2344 if (!hasver) while (*end != ';' && end > rstr) end--;
0d44d22b
NC
2345 *(end++) = '\n'; *end = '\0';
2346 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2347 if (hasdir) {
2348 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2349 begin = rstr;
2350 }
2351 else {
2352 begin = end;
2353 while (*(--begin) != ']' && *begin != '>') ;
2354 ++begin;
2355 }
2356 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2357 }
2358 if (cxt) (void)lib$find_file_end(&cxt);
2359 if (ok && sts != RMS$_NMF &&
93189314 2360 sts != RMS$_DNF && sts != RMS_FNF) ok = 0;
0d44d22b
NC
2361 if (!ok) {
2362 if (!(sts & 1)) {
2363 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2364 }
2365 PerlIO_close(tmpfp);
2366 fp = NULL;
2367 }
2368 else {
2369 PerlIO_rewind(tmpfp);
2370 IoTYPE(io) = IoTYPE_RDONLY;
2371 IoIFP(io) = fp = tmpfp;
2372 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2373 }
2374 }
2375 }
2376#else /* !VMS */
2377#ifdef MACOS_TRADITIONAL
2378 sv_setpv(tmpcmd, "glob ");
2379 sv_catsv(tmpcmd, tmpglob);
2380 sv_catpv(tmpcmd, " |");
2381#else
2382#ifdef DOSISH
2383#ifdef OS2
2384 sv_setpv(tmpcmd, "for a in ");
2385 sv_catsv(tmpcmd, tmpglob);
2386 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2387#else
2388#ifdef DJGPP
2389 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2390 sv_catsv(tmpcmd, tmpglob);
2391#else
2392 sv_setpv(tmpcmd, "perlglob ");
2393 sv_catsv(tmpcmd, tmpglob);
2394 sv_catpv(tmpcmd, " |");
2395#endif /* !DJGPP */
2396#endif /* !OS2 */
2397#else /* !DOSISH */
2398#if defined(CSH)
2399 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2400 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2401 sv_catsv(tmpcmd, tmpglob);
2402 sv_catpv(tmpcmd, "' 2>/dev/null |");
2403#else
2404 sv_setpv(tmpcmd, "echo ");
2405 sv_catsv(tmpcmd, tmpglob);
2406#if 'z' - 'a' == 25
2407 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2408#else
2409 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2410#endif
2411#endif /* !CSH */
2412#endif /* !DOSISH */
2413#endif /* MACOS_TRADITIONAL */
93524f2b 2414 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
0d44d22b
NC
2415 FALSE, O_RDONLY, 0, Nullfp);
2416 fp = IoIFP(io);
2417#endif /* !VMS */
2418 LEAVE;
2419 return fp;
2420}
66610fdd
RGS
2421
2422/*
2423 * Local variables:
2424 * c-indentation-style: bsd
2425 * c-basic-offset: 4
2426 * indent-tabs-mode: t
2427 * End:
2428 *
37442d52
RGS
2429 * ex: set ts=8 sts=4 sw=4 noet:
2430 */