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Patch to JPL example program
[perl5.git] / doio.c
CommitLineData
a0d0e21e 1/* doio.c
a687059c 2 *
4eb8286e 3 * Copyright (c) 1991-1999, Larry Wall
a687059c 4 *
6e21c824
LW
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
a0d0e21e
LW
8 */
9
10/*
11 * "Far below them they saw the white waters pour into a foaming bowl, and
12 * then swirl darkly about a deep oval basin in the rocks, until they found
13 * their way out again through a narrow gate, and flowed away, fuming and
14 * chattering, into calmer and more level reaches."
a687059c
LW
15 */
16
17#include "EXTERN.h"
864dbfa3 18#define PERL_IN_DOIO_C
a687059c
LW
19#include "perl.h"
20
fe14fcc3 21#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
aec308ec 22#ifndef HAS_SEM
c2ab57d4 23#include <sys/ipc.h>
aec308ec 24#endif
fe14fcc3 25#ifdef HAS_MSG
c2ab57d4 26#include <sys/msg.h>
e5d73d77 27#endif
fe14fcc3 28#ifdef HAS_SHM
c2ab57d4 29#include <sys/shm.h>
a0d0e21e 30# ifndef HAS_SHMAT_PROTOTYPE
20ce7b12 31 extern Shmat_t shmat (int, char *, int);
a0d0e21e 32# endif
c2ab57d4 33#endif
e5d73d77 34#endif
c2ab57d4 35
663a0e37 36#ifdef I_UTIME
3730b96e 37# if defined(_MSC_VER) || defined(__MINGW32__)
3fe9a6f1
PP
38# include <sys/utime.h>
39# else
40# include <utime.h>
41# endif
663a0e37 42#endif
85aff577 43
ff8e2863
LW
44#ifdef I_FCNTL
45#include <fcntl.h>
46#endif
fe14fcc3
LW
47#ifdef I_SYS_FILE
48#include <sys/file.h>
49#endif
85aff577
CS
50#ifdef O_EXCL
51# define OPEN_EXCL O_EXCL
52#else
53# define OPEN_EXCL 0
54#endif
a687059c 55
76121258
PP
56#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
57#include <signal.h>
58#endif
59
60/* XXX If this causes problems, set i_unistd=undef in the hint file. */
61#ifdef I_UNISTD
62# include <unistd.h>
63#endif
64
232e078e
AD
65#if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
66# include <sys/socket.h>
29209bc5 67# if defined(USE_SOCKS) && defined(I_SOCKS)
86959918
JH
68# include <socks.h>
69# endif
70# ifdef I_NETBSD
71# include <netdb.h>
72# endif
232e078e
AD
73# ifndef ENOTSOCK
74# ifdef I_NET_ERRNO
75# include <net/errno.h>
76# endif
77# endif
78#endif
79
d574b85e
CS
80/* Put this after #includes because <unistd.h> defines _XOPEN_*. */
81#ifndef Sock_size_t
137443ea 82# if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
d574b85e
CS
83# define Sock_size_t Size_t
84# else
85# define Sock_size_t int
86# endif
87#endif
88
a687059c 89bool
864dbfa3 90Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp)
a687059c 91{
a0d0e21e 92 register IO *io = GvIOn(gv);
760ac839
LW
93 PerlIO *saveifp = Nullfp;
94 PerlIO *saveofp = Nullfp;
6e21c824 95 char savetype = ' ';
c07a80fd 96 int writing = 0;
760ac839 97 PerlIO *fp;
c07a80fd
PP
98 int fd;
99 int result;
3500f679 100 bool was_fdopen = FALSE;
a687059c 101
3280af22 102 PL_forkprocess = 1; /* assume true if no fork */
c07a80fd 103
a0d0e21e 104 if (IoIFP(io)) {
760ac839 105 fd = PerlIO_fileno(IoIFP(io));
8990e307 106 if (IoTYPE(io) == '-')
c2ab57d4 107 result = 0;
3280af22 108 else if (fd <= PL_maxsysfd) {
8990e307
LW
109 saveifp = IoIFP(io);
110 saveofp = IoOFP(io);
111 savetype = IoTYPE(io);
6e21c824
LW
112 result = 0;
113 }
8990e307 114 else if (IoTYPE(io) == '|')
3028581b 115 result = PerlProc_pclose(IoIFP(io));
8990e307
LW
116 else if (IoIFP(io) != IoOFP(io)) {
117 if (IoOFP(io)) {
760ac839
LW
118 result = PerlIO_close(IoOFP(io));
119 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
120 }
121 else
760ac839 122 result = PerlIO_close(IoIFP(io));
a687059c 123 }
a687059c 124 else
760ac839 125 result = PerlIO_close(IoIFP(io));
3280af22 126 if (result == EOF && fd > PL_maxsysfd)
760ac839 127 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
79072805 128 GvENAME(gv));
8990e307 129 IoOFP(io) = IoIFP(io) = Nullfp;
a687059c 130 }
c07a80fd
PP
131
132 if (as_raw) {
5ff3f7a4
GS
133#if defined(O_LARGEFILE)
134 rawmode |= O_LARGEFILE;
135#endif
136
9d116dd7
JH
137#ifndef O_ACCMODE
138#define O_ACCMODE 3 /* Assume traditional implementation */
139#endif
5ff3f7a4 140
9d116dd7
JH
141 switch (result = rawmode & O_ACCMODE) {
142 case O_RDONLY:
143 IoTYPE(io) = '<';
144 break;
145 case O_WRONLY:
146 IoTYPE(io) = '>';
147 break;
148 case O_RDWR:
149 default:
150 IoTYPE(io) = '+';
151 break;
152 }
153
c07a80fd 154 writing = (result > 0);
3028581b 155 fd = PerlLIO_open3(name, rawmode, rawperm);
9d116dd7 156
c07a80fd
PP
157 if (fd == -1)
158 fp = NULL;
159 else {
360e5741 160 char *fpmode;
9d116dd7 161 if (result == O_RDONLY)
360e5741
CS
162 fpmode = "r";
163#ifdef O_APPEND
164 else if (rawmode & O_APPEND)
9d116dd7 165 fpmode = (result == O_WRONLY) ? "a" : "a+";
360e5741
CS
166#endif
167 else
9d116dd7 168 fpmode = (result == O_WRONLY) ? "w" : "r+";
360e5741 169 fp = PerlIO_fdopen(fd, fpmode);
c07a80fd 170 if (!fp)
3028581b 171 PerlLIO_close(fd);
c07a80fd 172 }
a687059c 173 }
c07a80fd
PP
174 else {
175 char *myname;
176 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
177 int dodup;
178
179 myname = savepvn(name, len);
180 SAVEFREEPV(myname);
181 name = myname;
182 while (len && isSPACE(name[len-1]))
183 name[--len] = '\0';
184
185 mode[0] = mode[1] = mode[2] = '\0';
186 IoTYPE(io) = *name;
187 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
188 mode[1] = *name++;
189 --len;
190 writing = 1;
a687059c 191 }
c07a80fd
PP
192
193 if (*name == '|') {
194 /*SUPPRESS 530*/
195 for (name++; isSPACE(*name); name++) ;
06eaf0bc
GS
196 if (*name == '\0') { /* command is missing 19990114 */
197 dTHR;
198 if (ckWARN(WARN_PIPE))
cea2e8a9 199 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
06eaf0bc
GS
200 errno = EPIPE;
201 goto say_false;
202 }
c07a80fd
PP
203 if (strNE(name,"-"))
204 TAINT_ENV();
205 TAINT_PROPER("piped open");
7b8d334a 206 if (name[strlen(name)-1] == '|') {
d008e5eb 207 dTHR;
7b8d334a 208 name[strlen(name)-1] = '\0' ;
599cee73 209 if (ckWARN(WARN_PIPE))
cea2e8a9 210 Perl_warner(aTHX_ WARN_PIPE, "Can't do bidirectional pipe");
7b8d334a 211 }
3028581b 212 fp = PerlProc_popen(name,"w");
c07a80fd
PP
213 writing = 1;
214 }
215 else if (*name == '>') {
216 TAINT_PROPER("open");
bf38876a 217 name++;
c07a80fd
PP
218 if (*name == '>') {
219 mode[0] = IoTYPE(io) = 'a';
bf38876a 220 name++;
a0d0e21e 221 }
c07a80fd
PP
222 else
223 mode[0] = 'w';
224 writing = 1;
225
226 if (*name == '&') {
227 duplicity:
228 dodup = 1;
229 name++;
230 if (*name == '=') {
231 dodup = 0;
a0d0e21e 232 name++;
c07a80fd
PP
233 }
234 if (!*name && supplied_fp)
235 fp = supplied_fp;
a0d0e21e 236 else {
c07a80fd
PP
237 /*SUPPRESS 530*/
238 for (; isSPACE(*name); name++) ;
239 if (isDIGIT(*name))
240 fd = atoi(name);
241 else {
242 IO* thatio;
243 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
244 thatio = GvIO(gv);
245 if (!thatio) {
6e21c824 246#ifdef EINVAL
c07a80fd 247 SETERRNO(EINVAL,SS$_IVCHAN);
6e21c824 248#endif
c07a80fd
PP
249 goto say_false;
250 }
251 if (IoIFP(thatio)) {
760ac839 252 fd = PerlIO_fileno(IoIFP(thatio));
c07a80fd
PP
253 if (IoTYPE(thatio) == 's')
254 IoTYPE(io) = 's';
255 }
256 else
257 fd = -1;
a0d0e21e 258 }
fec02dd3 259 if (dodup)
3028581b 260 fd = PerlLIO_dup(fd);
3500f679
RS
261 else
262 was_fdopen = TRUE;
760ac839 263 if (!(fp = PerlIO_fdopen(fd,mode))) {
c07a80fd 264 if (dodup)
3028581b 265 PerlLIO_close(fd);
517844ec 266 }
c07a80fd 267 }
bf38876a 268 }
c07a80fd
PP
269 else {
270 /*SUPPRESS 530*/
271 for (; isSPACE(*name); name++) ;
272 if (strEQ(name,"-")) {
760ac839 273 fp = PerlIO_stdout();
c07a80fd
PP
274 IoTYPE(io) = '-';
275 }
276 else {
760ac839 277 fp = PerlIO_open(name,mode);
c07a80fd 278 }
bf38876a
LW
279 }
280 }
c07a80fd
PP
281 else if (*name == '<') {
282 /*SUPPRESS 530*/
283 for (name++; isSPACE(*name); name++) ;
bf38876a 284 mode[0] = 'r';
bf38876a
LW
285 if (*name == '&')
286 goto duplicity;
a687059c 287 if (strEQ(name,"-")) {
760ac839 288 fp = PerlIO_stdin();
8990e307 289 IoTYPE(io) = '-';
a687059c 290 }
bf38876a 291 else
760ac839 292 fp = PerlIO_open(name,mode);
a687059c 293 }
00db4c45 294 else if (len > 1 && name[len-1] == '|') {
a687059c 295 name[--len] = '\0';
99b89507 296 while (len && isSPACE(name[len-1]))
a687059c 297 name[--len] = '\0';
99b89507
LW
298 /*SUPPRESS 530*/
299 for (; isSPACE(*name); name++) ;
06eaf0bc
GS
300 if (*name == '\0') { /* command is missing 19990114 */
301 dTHR;
302 if (ckWARN(WARN_PIPE))
cea2e8a9 303 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
06eaf0bc
GS
304 errno = EPIPE;
305 goto say_false;
306 }
79072805
LW
307 if (strNE(name,"-"))
308 TAINT_ENV();
309 TAINT_PROPER("piped open");
3028581b 310 fp = PerlProc_popen(name,"r");
8990e307 311 IoTYPE(io) = '|';
a687059c
LW
312 }
313 else {
8990e307 314 IoTYPE(io) = '<';
99b89507
LW
315 /*SUPPRESS 530*/
316 for (; isSPACE(*name); name++) ;
a687059c 317 if (strEQ(name,"-")) {
760ac839 318 fp = PerlIO_stdin();
8990e307 319 IoTYPE(io) = '-';
a687059c
LW
320 }
321 else
760ac839 322 fp = PerlIO_open(name,"r");
a687059c
LW
323 }
324 }
bee1dbe2 325 if (!fp) {
d008e5eb 326 dTHR;
599cee73 327 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
cea2e8a9 328 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
6e21c824 329 goto say_false;
bee1dbe2 330 }
8990e307
LW
331 if (IoTYPE(io) &&
332 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
96827780 333 dTHR;
3280af22 334 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
760ac839 335 (void)PerlIO_close(fp);
6e21c824 336 goto say_false;
a687059c 337 }
3280af22 338 if (S_ISSOCK(PL_statbuf.st_mode))
8990e307 339 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
99b89507
LW
340#ifdef HAS_SOCKET
341 else if (
c623bd54 342#ifdef S_IFMT
3280af22 343 !(PL_statbuf.st_mode & S_IFMT)
99b89507 344#else
b28d0864 345 !PL_statbuf.st_mode
99b89507
LW
346#endif
347 ) {
96827780
MB
348 char tmpbuf[256];
349 Sock_size_t buflen = sizeof tmpbuf;
3028581b 350 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
d574b85e
CS
351 &buflen) >= 0
352 || errno != ENOTSOCK)
8990e307 353 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
99b89507
LW
354 /* but some return 0 for streams too, sigh */
355 }
bf38876a 356#endif
a687059c 357 }
6e21c824 358 if (saveifp) { /* must use old fp? */
760ac839 359 fd = PerlIO_fileno(saveifp);
6e21c824 360 if (saveofp) {
760ac839 361 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
6e21c824 362 if (saveofp != saveifp) { /* was a socket? */
760ac839 363 PerlIO_close(saveofp);
99b89507
LW
364 if (fd > 2)
365 Safefree(saveofp);
6e21c824
LW
366 }
367 }
760ac839 368 if (fd != PerlIO_fileno(fp)) {
bee1dbe2 369 int pid;
79072805 370 SV *sv;
bee1dbe2 371
3028581b 372 PerlLIO_dup2(PerlIO_fileno(fp), fd);
3280af22 373 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
a0d0e21e 374 (void)SvUPGRADE(sv, SVt_IV);
463ee0b2
LW
375 pid = SvIVX(sv);
376 SvIVX(sv) = 0;
3280af22 377 sv = *av_fetch(PL_fdpid,fd,TRUE);
a0d0e21e 378 (void)SvUPGRADE(sv, SVt_IV);
463ee0b2 379 SvIVX(sv) = pid;
3500f679
RS
380 if (!was_fdopen)
381 PerlIO_close(fp);
bee1dbe2 382
6e21c824
LW
383 }
384 fp = saveifp;
760ac839 385 PerlIO_clearerr(fp);
6e21c824 386 }
a0d0e21e 387#if defined(HAS_FCNTL) && defined(F_SETFD)
a8710ca1
GS
388 {
389 int save_errno = errno;
390 fd = PerlIO_fileno(fp);
391 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
392 errno = save_errno;
393 }
1462b684 394#endif
8990e307 395 IoIFP(io) = fp;
bf38876a 396 if (writing) {
96827780 397 dTHR;
8990e307 398 if (IoTYPE(io) == 's'
3280af22 399 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
760ac839
LW
400 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
401 PerlIO_close(fp);
8990e307 402 IoIFP(io) = Nullfp;
6e21c824 403 goto say_false;
fe14fcc3 404 }
1462b684
LW
405 }
406 else
8990e307 407 IoOFP(io) = fp;
bf38876a 408 }
a687059c 409 return TRUE;
6e21c824
LW
410
411say_false:
8990e307
LW
412 IoIFP(io) = saveifp;
413 IoOFP(io) = saveofp;
414 IoTYPE(io) = savetype;
6e21c824 415 return FALSE;
a687059c
LW
416}
417
760ac839 418PerlIO *
864dbfa3 419Perl_nextargv(pTHX_ register GV *gv)
a687059c 420{
79072805 421 register SV *sv;
99b89507 422#ifndef FLEXFILENAMES
c623bd54
LW
423 int filedev;
424 int fileino;
99b89507 425#endif
761237fe
JB
426 Uid_t fileuid;
427 Gid_t filegid;
fe14fcc3 428
3280af22
NIS
429 if (!PL_argvoutgv)
430 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
431 if (PL_filemode & (S_ISUID|S_ISGID)) {
432 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
fe14fcc3 433#ifdef HAS_FCHMOD
3280af22 434 (void)fchmod(PL_lastfd,PL_filemode);
fe14fcc3 435#else
b28d0864 436 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
fe14fcc3
LW
437#endif
438 }
3280af22 439 PL_filemode = 0;
79072805 440 while (av_len(GvAV(gv)) >= 0) {
11343788 441 dTHR;
85aff577 442 STRLEN oldlen;
79072805 443 sv = av_shift(GvAV(gv));
8990e307 444 SAVEFREESV(sv);
79072805
LW
445 sv_setsv(GvSV(gv),sv);
446 SvSETMAGIC(GvSV(gv));
3280af22 447 PL_oldname = SvPVx(GvSV(gv), oldlen);
9d116dd7 448 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
3280af22 449 if (PL_inplace) {
79072805 450 TAINT_PROPER("inplace open");
3280af22 451 if (oldlen == 1 && *PL_oldname == '-') {
4633a7c4 452 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
a0d0e21e 453 return IoIFP(GvIOp(gv));
c623bd54 454 }
99b89507 455#ifndef FLEXFILENAMES
b28d0864
NIS
456 filedev = PL_statbuf.st_dev;
457 fileino = PL_statbuf.st_ino;
99b89507 458#endif
3280af22
NIS
459 PL_filemode = PL_statbuf.st_mode;
460 fileuid = PL_statbuf.st_uid;
461 filegid = PL_statbuf.st_gid;
462 if (!S_ISREG(PL_filemode)) {
cea2e8a9 463 Perl_warn(aTHX_ "Can't do inplace edit: %s is not a regular file",
3280af22 464 PL_oldname );
79072805 465 do_close(gv,FALSE);
c623bd54
LW
466 continue;
467 }
3280af22
NIS
468 if (*PL_inplace) {
469 char *star = strchr(PL_inplace, '*');
2d259d92 470 if (star) {
3280af22 471 char *begin = PL_inplace;
2d259d92
CK
472 sv_setpvn(sv, "", 0);
473 do {
474 sv_catpvn(sv, begin, star - begin);
3280af22 475 sv_catpvn(sv, PL_oldname, oldlen);
2d259d92
CK
476 begin = ++star;
477 } while ((star = strchr(begin, '*')));
3d66d7bb
GS
478 if (*begin)
479 sv_catpv(sv,begin);
2d259d92
CK
480 }
481 else {
3280af22 482 sv_catpv(sv,PL_inplace);
2d259d92 483 }
c623bd54 484#ifndef FLEXFILENAMES
b28d0864
NIS
485 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
486 && PL_statbuf.st_dev == filedev
487 && PL_statbuf.st_ino == fileino
39e571d4
ML
488#ifdef DJGPP
489 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
490#endif
491 ) {
cea2e8a9 492 Perl_warn(aTHX_ "Can't do inplace edit: %s would not be unique",
463ee0b2 493 SvPVX(sv) );
79072805 494 do_close(gv,FALSE);
c623bd54
LW
495 continue;
496 }
497#endif
fe14fcc3 498#ifdef HAS_RENAME
bee1dbe2 499#ifndef DOSISH
3280af22 500 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
cea2e8a9 501 Perl_warn(aTHX_ "Can't rename %s to %s: %s, skipping file",
3280af22 502 PL_oldname, SvPVX(sv), Strerror(errno) );
79072805 503 do_close(gv,FALSE);
c623bd54
LW
504 continue;
505 }
a687059c 506#else
79072805 507 do_close(gv,FALSE);
3028581b 508 (void)PerlLIO_unlink(SvPVX(sv));
b28d0864 509 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
9d116dd7 510 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
55497cff 511#endif /* DOSISH */
ff8e2863 512#else
463ee0b2 513 (void)UNLINK(SvPVX(sv));
b28d0864 514 if (link(PL_oldname,SvPVX(sv)) < 0) {
cea2e8a9 515 Perl_warn(aTHX_ "Can't rename %s to %s: %s, skipping file",
b28d0864 516 PL_oldname, SvPVX(sv), Strerror(errno) );
79072805 517 do_close(gv,FALSE);
c623bd54
LW
518 continue;
519 }
b28d0864 520 (void)UNLINK(PL_oldname);
a687059c
LW
521#endif
522 }
523 else {
a8c18271 524#if !defined(DOSISH) && !defined(AMIGAOS)
edc7bc49 525# ifndef VMS /* Don't delete; use automatic file versioning */
3280af22 526 if (UNLINK(PL_oldname) < 0) {
cea2e8a9 527 Perl_warn(aTHX_ "Can't remove %s: %s, skipping file",
3280af22 528 PL_oldname, Strerror(errno) );
79072805 529 do_close(gv,FALSE);
fe14fcc3
LW
530 continue;
531 }
edc7bc49 532# endif
ff8e2863 533#else
cea2e8a9 534 Perl_croak(aTHX_ "Can't do inplace edit without backup");
ff8e2863 535#endif
a687059c
LW
536 }
537
3280af22
NIS
538 sv_setpvn(sv,">",!PL_inplace);
539 sv_catpvn(sv,PL_oldname,oldlen);
748a9306 540 SETERRNO(0,0); /* in case sprintf set errno */
4119ab01
HM
541#ifdef VMS
542 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
543 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
544#else
3280af22 545 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
85aff577 546 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
4119ab01 547#endif
cea2e8a9 548 Perl_warn(aTHX_ "Can't do inplace edit on %s: %s",
3280af22 549 PL_oldname, Strerror(errno) );
79072805 550 do_close(gv,FALSE);
fe14fcc3
LW
551 continue;
552 }
3280af22
NIS
553 setdefout(PL_argvoutgv);
554 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
555 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
fe14fcc3 556#ifdef HAS_FCHMOD
3280af22 557 (void)fchmod(PL_lastfd,PL_filemode);
a687059c 558#else
3e3baf6d
TB
559# if !(defined(WIN32) && defined(__BORLANDC__))
560 /* Borland runtime creates a readonly file! */
b28d0864 561 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
3e3baf6d 562# endif
a687059c 563#endif
3280af22 564 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
fe14fcc3 565#ifdef HAS_FCHOWN
3280af22 566 (void)fchown(PL_lastfd,fileuid,filegid);
a687059c 567#else
fe14fcc3 568#ifdef HAS_CHOWN
b28d0864 569 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
a687059c 570#endif
b1248f16 571#endif
fe14fcc3 572 }
a687059c 573 }
a0d0e21e 574 return IoIFP(GvIOp(gv));
a687059c
LW
575 }
576 else
22fae026 577 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
2d8e6c8d 578 SvPV(sv, oldlen), Strerror(errno));
a687059c 579 }
3280af22
NIS
580 if (PL_inplace) {
581 (void)do_close(PL_argvoutgv,FALSE);
4633a7c4 582 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
a687059c
LW
583 }
584 return Nullfp;
585}
586
fe14fcc3 587#ifdef HAS_PIPE
afd9f252 588void
864dbfa3 589Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
afd9f252 590{
79072805
LW
591 register IO *rstio;
592 register IO *wstio;
afd9f252
LW
593 int fd[2];
594
79072805 595 if (!rgv)
afd9f252 596 goto badexit;
79072805 597 if (!wgv)
afd9f252
LW
598 goto badexit;
599
a0d0e21e
LW
600 rstio = GvIOn(rgv);
601 wstio = GvIOn(wgv);
afd9f252 602
a0d0e21e 603 if (IoIFP(rstio))
79072805 604 do_close(rgv,FALSE);
a0d0e21e 605 if (IoIFP(wstio))
79072805 606 do_close(wgv,FALSE);
afd9f252 607
3028581b 608 if (PerlProc_pipe(fd) < 0)
afd9f252 609 goto badexit;
760ac839
LW
610 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
611 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
8990e307
LW
612 IoIFP(wstio) = IoOFP(wstio);
613 IoTYPE(rstio) = '<';
614 IoTYPE(wstio) = '>';
615 if (!IoIFP(rstio) || !IoOFP(wstio)) {
760ac839 616 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
3028581b 617 else PerlLIO_close(fd[0]);
760ac839 618 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
3028581b 619 else PerlLIO_close(fd[1]);
fe14fcc3
LW
620 goto badexit;
621 }
afd9f252 622
3280af22 623 sv_setsv(sv,&PL_sv_yes);
afd9f252
LW
624 return;
625
626badexit:
3280af22 627 sv_setsv(sv,&PL_sv_undef);
afd9f252
LW
628 return;
629}
b1248f16 630#endif
afd9f252 631
517844ec 632/* explicit renamed to avoid C++ conflict -- kja */
a687059c 633bool
864dbfa3 634Perl_do_close(pTHX_ GV *gv, bool not_implicit)
a687059c 635{
1193dd27
IZ
636 bool retval;
637 IO *io;
a687059c 638
79072805 639 if (!gv)
3280af22 640 gv = PL_argvgv;
a0d0e21e 641 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1d2dff63
GS
642 if (not_implicit)
643 SETERRNO(EBADF,SS$_IVCHAN);
c2ab57d4 644 return FALSE;
99b89507 645 }
79072805
LW
646 io = GvIO(gv);
647 if (!io) { /* never opened */
1d2dff63 648 if (not_implicit) {
d008e5eb 649 dTHR;
599cee73 650 if (ckWARN(WARN_UNOPENED))
cea2e8a9 651 Perl_warner(aTHX_ WARN_UNOPENED,
599cee73 652 "Close on unopened file <%s>",GvENAME(gv));
1d2dff63
GS
653 SETERRNO(EBADF,SS$_IVCHAN);
654 }
a687059c
LW
655 return FALSE;
656 }
1193dd27 657 retval = io_close(io);
517844ec 658 if (not_implicit) {
1193dd27
IZ
659 IoLINES(io) = 0;
660 IoPAGE(io) = 0;
661 IoLINES_LEFT(io) = IoPAGE_LEN(io);
662 }
663 IoTYPE(io) = ' ';
664 return retval;
665}
666
667bool
864dbfa3 668Perl_io_close(pTHX_ IO *io)
1193dd27
IZ
669{
670 bool retval = FALSE;
671 int status;
672
8990e307
LW
673 if (IoIFP(io)) {
674 if (IoTYPE(io) == '|') {
3028581b 675 status = PerlProc_pclose(IoIFP(io));
f86702cc 676 STATUS_NATIVE_SET(status);
1e422769 677 retval = (STATUS_POSIX == 0);
a687059c 678 }
8990e307 679 else if (IoTYPE(io) == '-')
a687059c
LW
680 retval = TRUE;
681 else {
8990e307 682 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
760ac839
LW
683 retval = (PerlIO_close(IoOFP(io)) != EOF);
684 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
c2ab57d4
LW
685 }
686 else
760ac839 687 retval = (PerlIO_close(IoIFP(io)) != EOF);
a687059c 688 }
8990e307 689 IoOFP(io) = IoIFP(io) = Nullfp;
79072805 690 }
20408e3c
GS
691 else {
692 SETERRNO(EBADF,SS$_IVCHAN);
693 }
1193dd27 694
a687059c
LW
695 return retval;
696}
697
698bool
864dbfa3 699Perl_do_eof(pTHX_ GV *gv)
a687059c 700{
11343788 701 dTHR;
79072805 702 register IO *io;
a687059c
LW
703 int ch;
704
79072805 705 io = GvIO(gv);
a687059c 706
79072805 707 if (!io)
a687059c 708 return TRUE;
af8c498a
GS
709 else if (ckWARN(WARN_IO)
710 && (IoTYPE(io) == '>' || IoIFP(io) == PerlIO_stdout()
711 || IoIFP(io) == PerlIO_stderr()))
712 {
713 SV* sv = sv_newmortal();
714 gv_efullname3(sv, gv, Nullch);
715 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for output",
716 SvPV_nolen(sv));
717 }
a687059c 718
8990e307 719 while (IoIFP(io)) {
a687059c 720
760ac839
LW
721 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
722 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
723 return FALSE; /* this is the most usual case */
724 }
a687059c 725
760ac839 726 ch = PerlIO_getc(IoIFP(io));
a687059c 727 if (ch != EOF) {
760ac839 728 (void)PerlIO_ungetc(IoIFP(io),ch);
a687059c
LW
729 return FALSE;
730 }
760ac839
LW
731 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
732 if (PerlIO_get_cnt(IoIFP(io)) < -1)
733 PerlIO_set_cnt(IoIFP(io),-1);
734 }
533c011a 735 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
3280af22 736 if (!nextargv(PL_argvgv)) /* get another fp handy */
a687059c
LW
737 return TRUE;
738 }
739 else
740 return TRUE; /* normal fp, definitely end of file */
741 }
742 return TRUE;
743}
744
5ff3f7a4 745Off_t
864dbfa3 746Perl_do_tell(pTHX_ GV *gv)
a687059c 747{
79072805 748 register IO *io;
96e4d5b1 749 register PerlIO *fp;
a687059c 750
96e4d5b1 751 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 752#ifdef ULTRIX_STDIO_BOTCH
96e4d5b1
PP
753 if (PerlIO_eof(fp))
754 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 755#endif
8903cb82 756 return PerlIO_tell(fp);
96e4d5b1 757 }
d008e5eb
GS
758 {
759 dTHR;
760 if (ckWARN(WARN_UNOPENED))
cea2e8a9 761 Perl_warner(aTHX_ WARN_UNOPENED, "tell() on unopened file");
d008e5eb 762 }
748a9306 763 SETERRNO(EBADF,RMS$_IFI);
5ff3f7a4 764 return (Off_t)-1;
a687059c
LW
765}
766
767bool
864dbfa3 768Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
a687059c 769{
79072805 770 register IO *io;
137443ea 771 register PerlIO *fp;
a687059c 772
137443ea 773 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
bee1dbe2 774#ifdef ULTRIX_STDIO_BOTCH
137443ea
PP
775 if (PerlIO_eof(fp))
776 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
bee1dbe2 777#endif
8903cb82 778 return PerlIO_seek(fp, pos, whence) >= 0;
137443ea 779 }
d008e5eb
GS
780 {
781 dTHR;
782 if (ckWARN(WARN_UNOPENED))
cea2e8a9 783 Perl_warner(aTHX_ WARN_UNOPENED, "seek() on unopened file");
d008e5eb 784 }
748a9306 785 SETERRNO(EBADF,RMS$_IFI);
a687059c
LW
786 return FALSE;
787}
788
97cc44eb 789Off_t
864dbfa3 790Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
8903cb82
PP
791{
792 register IO *io;
793 register PerlIO *fp;
794
795 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
3028581b 796 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
d008e5eb
GS
797 {
798 dTHR;
799 if (ckWARN(WARN_UNOPENED))
cea2e8a9 800 Perl_warner(aTHX_ WARN_UNOPENED, "sysseek() on unopened file");
d008e5eb 801 }
8903cb82
PP
802 SETERRNO(EBADF,RMS$_IFI);
803 return -1L;
804}
805
6ff81951 806int
864dbfa3 807Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int flag)
6ff81951
GS
808{
809 if (flag != TRUE)
cea2e8a9 810 Perl_croak(aTHX_ "panic: unsetting binmode"); /* Not implemented yet */
6ff81951 811#ifdef DOSISH
61ae2fbf 812#if defined(atarist) || defined(__MINT__)
6ff81951
GS
813 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
814 return 1;
815 else
816 return 0;
817#else
818 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
819#if defined(WIN32) && defined(__BORLANDC__)
820 /* The translation mode of the stream is maintained independent
821 * of the translation mode of the fd in the Borland RTL (heavy
822 * digging through their runtime sources reveal). User has to
823 * set the mode explicitly for the stream (though they don't
824 * document this anywhere). GSAR 97-5-24
825 */
826 PerlIO_seek(fp,0L,0);
873ef191 827 ((FILE*)fp)->flags |= _F_BIN;
6ff81951
GS
828#endif
829 return 1;
830 }
831 else
832 return 0;
833#endif
834#else
835#if defined(USEMYBINMODE)
1cab015a 836 if (my_binmode(fp,iotype) != FALSE)
6ff81951
GS
837 return 1;
838 else
839 return 0;
840#else
841 return 1;
842#endif
843#endif
844}
845
a0d0e21e 846#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
c2ab57d4 847 /* code courtesy of William Kucharski */
fe14fcc3 848#define HAS_CHSIZE
6eb13c3b 849
517844ec 850I32 my_chsize(fd, length)
79072805 851I32 fd; /* file descriptor */
85e6fe83 852Off_t length; /* length to set file to */
6eb13c3b 853{
6eb13c3b
LW
854 struct flock fl;
855 struct stat filebuf;
856
3028581b 857 if (PerlLIO_fstat(fd, &filebuf) < 0)
6eb13c3b
LW
858 return -1;
859
860 if (filebuf.st_size < length) {
861
862 /* extend file length */
863
3028581b 864 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
6eb13c3b
LW
865 return -1;
866
867 /* write a "0" byte */
868
3028581b 869 if ((PerlLIO_write(fd, "", 1)) != 1)
6eb13c3b
LW
870 return -1;
871 }
872 else {
873 /* truncate length */
874
875 fl.l_whence = 0;
876 fl.l_len = 0;
877 fl.l_start = length;
a0d0e21e 878 fl.l_type = F_WRLCK; /* write lock on file space */
6eb13c3b
LW
879
880 /*
a0d0e21e 881 * This relies on the UNDOCUMENTED F_FREESP argument to
6eb13c3b
LW
882 * fcntl(2), which truncates the file so that it ends at the
883 * position indicated by fl.l_start.
884 *
885 * Will minor miracles never cease?
886 */
887
a0d0e21e 888 if (fcntl(fd, F_FREESP, &fl) < 0)
6eb13c3b
LW
889 return -1;
890
891 }
892
893 return 0;
894}
a0d0e21e 895#endif /* F_FREESP */
ff8e2863 896
a687059c 897bool
864dbfa3 898Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
a687059c
LW
899{
900 register char *tmps;
463ee0b2 901 STRLEN len;
a687059c 902
79072805
LW
903 /* assuming fp is checked earlier */
904 if (!sv)
905 return TRUE;
3280af22 906 if (PL_ofmt) {
8990e307 907 if (SvGMAGICAL(sv))
79072805 908 mg_get(sv);
463ee0b2 909 if (SvIOK(sv) && SvIVX(sv) != 0) {
65202027 910 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
760ac839 911 return !PerlIO_error(fp);
79072805 912 }
463ee0b2 913 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
79072805 914 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
3280af22 915 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
760ac839 916 return !PerlIO_error(fp);
79072805 917 }
a687059c 918 }
79072805
LW
919 switch (SvTYPE(sv)) {
920 case SVt_NULL:
d008e5eb
GS
921 {
922 dTHR;
923 if (ckWARN(WARN_UNINITIALIZED))
cea2e8a9 924 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit);
d008e5eb 925 }
ff8e2863 926 return TRUE;
79072805 927 case SVt_IV:
a0d0e21e
LW
928 if (SvIOK(sv)) {
929 if (SvGMAGICAL(sv))
930 mg_get(sv);
25da4f38
IZ
931 if (SvIsUV(sv)) /* XXXX 64-bit? */
932 PerlIO_printf(fp, "%lu", (unsigned long)SvUVX(sv));
933 else
934 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
760ac839 935 return !PerlIO_error(fp);
a0d0e21e
LW
936 }
937 /* FALL THROUGH */
79072805 938 default:
463ee0b2 939 tmps = SvPV(sv, len);
79072805 940 break;
ff8e2863 941 }
760ac839 942 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
a687059c 943 return FALSE;
760ac839 944 return !PerlIO_error(fp);
a687059c
LW
945}
946
79072805 947I32
cea2e8a9 948Perl_my_stat(pTHX)
a687059c 949{
4e35701f 950 djSP;
79072805 951 IO *io;
748a9306 952 GV* tmpgv;
79072805 953
533c011a 954 if (PL_op->op_flags & OPf_REF) {
924508f0 955 EXTEND(SP,1);
748a9306
LW
956 tmpgv = cGVOP->op_gv;
957 do_fstat:
958 io = GvIO(tmpgv);
8990e307 959 if (io && IoIFP(io)) {
3280af22
NIS
960 PL_statgv = tmpgv;
961 sv_setpv(PL_statname,"");
962 PL_laststype = OP_STAT;
963 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
a687059c
LW
964 }
965 else {
3280af22
NIS
966 if (tmpgv == PL_defgv)
967 return PL_laststatval;
599cee73 968 if (ckWARN(WARN_UNOPENED))
cea2e8a9 969 Perl_warner(aTHX_ WARN_UNOPENED, "Stat on unopened file <%s>",
748a9306 970 GvENAME(tmpgv));
3280af22
NIS
971 PL_statgv = Nullgv;
972 sv_setpv(PL_statname,"");
973 return (PL_laststatval = -1);
a687059c
LW
974 }
975 }
976 else {
748a9306 977 SV* sv = POPs;
4b74e3fb 978 char *s;
2d8e6c8d 979 STRLEN n_a;
79072805 980 PUTBACK;
748a9306
LW
981 if (SvTYPE(sv) == SVt_PVGV) {
982 tmpgv = (GV*)sv;
983 goto do_fstat;
984 }
985 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
986 tmpgv = (GV*)SvRV(sv);
987 goto do_fstat;
988 }
989
2d8e6c8d 990 s = SvPV(sv, n_a);
3280af22
NIS
991 PL_statgv = Nullgv;
992 sv_setpv(PL_statname, s);
993 PL_laststype = OP_STAT;
994 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
599cee73 995 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
cea2e8a9 996 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
3280af22 997 return PL_laststatval;
a687059c
LW
998 }
999}
1000
79072805 1001I32
cea2e8a9 1002Perl_my_lstat(pTHX)
c623bd54 1003{
4e35701f 1004 djSP;
79072805 1005 SV *sv;
2d8e6c8d 1006 STRLEN n_a;
533c011a 1007 if (PL_op->op_flags & OPf_REF) {
924508f0 1008 EXTEND(SP,1);
3280af22
NIS
1009 if (cGVOP->op_gv == PL_defgv) {
1010 if (PL_laststype != OP_LSTAT)
cea2e8a9 1011 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
3280af22 1012 return PL_laststatval;
fe14fcc3 1013 }
cea2e8a9 1014 Perl_croak(aTHX_ "You can't use -l on a filehandle");
fe14fcc3 1015 }
c623bd54 1016
3280af22
NIS
1017 PL_laststype = OP_LSTAT;
1018 PL_statgv = Nullgv;
79072805
LW
1019 sv = POPs;
1020 PUTBACK;
2d8e6c8d 1021 sv_setpv(PL_statname,SvPV(sv, n_a));
2d8e6c8d 1022 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
2d8e6c8d 1023 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
cea2e8a9 1024 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
3280af22 1025 return PL_laststatval;
c623bd54
LW
1026}
1027
a687059c 1028bool
864dbfa3 1029Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
a687059c 1030{
a687059c 1031 register char **a;
a687059c 1032 char *tmps;
2d8e6c8d 1033 STRLEN n_a;
a687059c 1034
79072805 1035 if (sp > mark) {
11343788 1036 dTHR;
3280af22
NIS
1037 New(401,PL_Argv, sp - mark + 1, char*);
1038 a = PL_Argv;
79072805
LW
1039 while (++mark <= sp) {
1040 if (*mark)
2d8e6c8d 1041 *a++ = SvPVx(*mark, n_a);
a687059c
LW
1042 else
1043 *a++ = "";
1044 }
1045 *a = Nullch;
3280af22 1046 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
79072805 1047 TAINT_ENV(); /* testing IFS here is overkill, probably */
2d8e6c8d 1048 if (really && *(tmps = SvPV(really, n_a)))
3280af22 1049 PerlProc_execvp(tmps,PL_Argv);
a687059c 1050 else
3280af22 1051 PerlProc_execvp(PL_Argv[0],PL_Argv);
599cee73 1052 if (ckWARN(WARN_EXEC))
cea2e8a9 1053 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
599cee73 1054 PL_Argv[0], Strerror(errno));
a687059c 1055 }
bee1dbe2 1056 do_execfree();
a687059c
LW
1057 return FALSE;
1058}
1059
fe14fcc3 1060void
864dbfa3 1061Perl_do_execfree(pTHX)
ff8e2863 1062{
3280af22
NIS
1063 if (PL_Argv) {
1064 Safefree(PL_Argv);
1065 PL_Argv = Null(char **);
ff8e2863 1066 }
3280af22
NIS
1067 if (PL_Cmd) {
1068 Safefree(PL_Cmd);
1069 PL_Cmd = Nullch;
ff8e2863
LW
1070 }
1071}
1072
4d2c4e07 1073#if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC)
760ac839 1074
a687059c 1075bool
864dbfa3 1076Perl_do_exec(pTHX_ char *cmd)
a687059c 1077{
e446cec8
IZ
1078 return do_exec3(cmd,0,0);
1079}
1080
1081bool
864dbfa3 1082Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
e446cec8 1083{
a687059c
LW
1084 register char **a;
1085 register char *s;
a687059c
LW
1086 char flags[10];
1087
748a9306
LW
1088 while (*cmd && isSPACE(*cmd))
1089 cmd++;
1090
a687059c
LW
1091 /* save an extra exec if possible */
1092
bf38876a 1093#ifdef CSH
3280af22 1094 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
a687059c 1095 strcpy(flags,"-c");
3280af22 1096 s = cmd+PL_cshlen+3;
a687059c
LW
1097 if (*s == 'f') {
1098 s++;
1099 strcat(flags,"f");
1100 }
1101 if (*s == ' ')
1102 s++;
1103 if (*s++ == '\'') {
1104 char *ncmd = s;
1105
1106 while (*s)
1107 s++;
1108 if (s[-1] == '\n')
1109 *--s = '\0';
1110 if (s[-1] == '\'') {
1111 *--s = '\0';
3280af22 1112 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
a687059c
LW
1113 *s = '\'';
1114 return FALSE;
1115 }
1116 }
1117 }
bf38876a 1118#endif /* CSH */
a687059c
LW
1119
1120 /* see if there are shell metacharacters in it */
1121
748a9306
LW
1122 if (*cmd == '.' && isSPACE(cmd[1]))
1123 goto doshell;
1124
1125 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1126 goto doshell;
1127
99b89507 1128 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
63f2c1e1
LW
1129 if (*s == '=')
1130 goto doshell;
748a9306 1131
a687059c 1132 for (s = cmd; *s; s++) {
93a17b20 1133 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
a687059c
LW
1134 if (*s == '\n' && !s[1]) {
1135 *s = '\0';
1136 break;
1137 }
603a98b0
IZ
1138 /* handle the 2>&1 construct at the end */
1139 if (*s == '>' && s[1] == '&' && s[2] == '1'
1140 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1141 && (!s[3] || isSPACE(s[3])))
1142 {
1143 char *t = s + 3;
1144
1145 while (*t && isSPACE(*t))
1146 ++t;
1147 if (!*t && (dup2(1,2) != -1)) {
1148 s[-2] = '\0';
1149 break;
1150 }
1151 }
a687059c 1152 doshell:
3280af22 1153 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
a687059c
LW
1154 return FALSE;
1155 }
1156 }
748a9306 1157
3280af22
NIS
1158 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1159 PL_Cmd = savepvn(cmd, s-cmd);
1160 a = PL_Argv;
1161 for (s = PL_Cmd; *s;) {
99b89507 1162 while (*s && isSPACE(*s)) s++;
a687059c
LW
1163 if (*s)
1164 *(a++) = s;
99b89507 1165 while (*s && !isSPACE(*s)) s++;
a687059c
LW
1166 if (*s)
1167 *s++ = '\0';
1168 }
1169 *a = Nullch;
3280af22
NIS
1170 if (PL_Argv[0]) {
1171 PerlProc_execvp(PL_Argv[0],PL_Argv);
b1248f16 1172 if (errno == ENOEXEC) { /* for system V NIH syndrome */
ff8e2863 1173 do_execfree();
a687059c 1174 goto doshell;
b1248f16 1175 }
d008e5eb
GS
1176 {
1177 dTHR;
e446cec8
IZ
1178 int e = errno;
1179
d008e5eb 1180 if (ckWARN(WARN_EXEC))
cea2e8a9 1181 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
d008e5eb 1182 PL_Argv[0], Strerror(errno));
e446cec8
IZ
1183 if (do_report) {
1184 PerlLIO_write(fd, (void*)&e, sizeof(int));
1185 PerlLIO_close(fd);
1186 }
d008e5eb 1187 }
a687059c 1188 }
ff8e2863 1189 do_execfree();
a687059c
LW
1190 return FALSE;
1191}
1192
6890e559 1193#endif /* OS2 || WIN32 */
760ac839 1194
79072805 1195I32
864dbfa3 1196Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
a687059c 1197{
11343788 1198 dTHR;
79072805
LW
1199 register I32 val;
1200 register I32 val2;
1201 register I32 tot = 0;
20408e3c 1202 char *what;
a687059c 1203 char *s;
79072805 1204 SV **oldmark = mark;
2d8e6c8d 1205 STRLEN n_a;
a687059c 1206
20408e3c 1207#define APPLY_TAINT_PROPER() \
3280af22 1208 STMT_START { \
17406bd6 1209 if (PL_tainted) { TAINT_PROPER(what); } \
873ef191 1210 } STMT_END
20408e3c
GS
1211
1212 /* This is a first heuristic; it doesn't catch tainting magic. */
3280af22 1213 if (PL_tainting) {
463ee0b2 1214 while (++mark <= sp) {
bbce6d69
PP
1215 if (SvTAINTED(*mark)) {
1216 TAINT;
1217 break;
1218 }
463ee0b2
LW
1219 }
1220 mark = oldmark;
1221 }
a687059c 1222 switch (type) {
79072805 1223 case OP_CHMOD:
20408e3c
GS
1224 what = "chmod";
1225 APPLY_TAINT_PROPER();
79072805 1226 if (++mark <= sp) {
463ee0b2 1227 val = SvIVx(*mark);
20408e3c
GS
1228 APPLY_TAINT_PROPER();
1229 tot = sp - mark;
79072805 1230 while (++mark <= sp) {
2d8e6c8d 1231 char *name = SvPVx(*mark, n_a);
20408e3c
GS
1232 APPLY_TAINT_PROPER();
1233 if (PerlLIO_chmod(name, val))
a687059c
LW
1234 tot--;
1235 }
1236 }
1237 break;
fe14fcc3 1238#ifdef HAS_CHOWN
79072805 1239 case OP_CHOWN:
20408e3c
GS
1240 what = "chown";
1241 APPLY_TAINT_PROPER();
79072805 1242 if (sp - mark > 2) {
463ee0b2
LW
1243 val = SvIVx(*++mark);
1244 val2 = SvIVx(*++mark);
20408e3c 1245 APPLY_TAINT_PROPER();
a0d0e21e 1246 tot = sp - mark;
79072805 1247 while (++mark <= sp) {
2d8e6c8d 1248 char *name = SvPVx(*mark, n_a);
20408e3c 1249 APPLY_TAINT_PROPER();
36660982 1250 if (PerlLIO_chown(name, val, val2))
a687059c
LW
1251 tot--;
1252 }
1253 }
1254 break;
b1248f16 1255#endif
dd64f1c3
AD
1256/*
1257XXX Should we make lchown() directly available from perl?
1258For now, we'll let Configure test for HAS_LCHOWN, but do
1259nothing in the core.
1260 --AD 5/1998
1261*/
fe14fcc3 1262#ifdef HAS_KILL
79072805 1263 case OP_KILL:
20408e3c
GS
1264 what = "kill";
1265 APPLY_TAINT_PROPER();
55497cff
PP
1266 if (mark == sp)
1267 break;
2d8e6c8d 1268 s = SvPVx(*++mark, n_a);
79072805
LW
1269 if (isUPPER(*s)) {
1270 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1271 s += 3;
1272 if (!(val = whichsig(s)))
cea2e8a9 1273 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
79072805
LW
1274 }
1275 else
463ee0b2 1276 val = SvIVx(*mark);
20408e3c
GS
1277 APPLY_TAINT_PROPER();
1278 tot = sp - mark;
3595fcef
PP
1279#ifdef VMS
1280 /* kill() doesn't do process groups (job trees?) under VMS */
1281 if (val < 0) val = -val;
1282 if (val == SIGKILL) {
1283# include <starlet.h>
1284 /* Use native sys$delprc() to insure that target process is
1285 * deleted; supervisor-mode images don't pay attention to
1286 * CRTL's emulation of Unix-style signals and kill()
1287 */
1288 while (++mark <= sp) {
1289 I32 proc = SvIVx(*mark);
1290 register unsigned long int __vmssts;
20408e3c 1291 APPLY_TAINT_PROPER();
3595fcef
PP
1292 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1293 tot--;
1294 switch (__vmssts) {
1295 case SS$_NONEXPR:
1296 case SS$_NOSUCHNODE:
1297 SETERRNO(ESRCH,__vmssts);
1298 break;
1299 case SS$_NOPRIV:
1300 SETERRNO(EPERM,__vmssts);
1301 break;
1302 default:
1303 SETERRNO(EVMSERR,__vmssts);
1304 }
1305 }
1306 }
1307 break;
1308 }
1309#endif
79072805
LW
1310 if (val < 0) {
1311 val = -val;
1312 while (++mark <= sp) {
463ee0b2 1313 I32 proc = SvIVx(*mark);
20408e3c 1314 APPLY_TAINT_PROPER();
fe14fcc3 1315#ifdef HAS_KILLPG
3028581b 1316 if (PerlProc_killpg(proc,val)) /* BSD */
a687059c 1317#else
3028581b 1318 if (PerlProc_kill(-proc,val)) /* SYSV */
a687059c 1319#endif
79072805 1320 tot--;
a687059c 1321 }
79072805
LW
1322 }
1323 else {
1324 while (++mark <= sp) {
20408e3c
GS
1325 I32 proc = SvIVx(*mark);
1326 APPLY_TAINT_PROPER();
1327 if (PerlProc_kill(proc, val))
79072805 1328 tot--;
a687059c
LW
1329 }
1330 }
1331 break;
b1248f16 1332#endif
79072805 1333 case OP_UNLINK:
20408e3c
GS
1334 what = "unlink";
1335 APPLY_TAINT_PROPER();
79072805
LW
1336 tot = sp - mark;
1337 while (++mark <= sp) {
2d8e6c8d 1338 s = SvPVx(*mark, n_a);
20408e3c 1339 APPLY_TAINT_PROPER();
3280af22 1340 if (PL_euid || PL_unsafe) {
a687059c
LW
1341 if (UNLINK(s))
1342 tot--;
1343 }
1344 else { /* don't let root wipe out directories without -U */
3280af22 1345 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
a687059c
LW
1346 tot--;
1347 else {
1348 if (UNLINK(s))
1349 tot--;
1350 }
1351 }
1352 }
1353 break;
a0d0e21e 1354#ifdef HAS_UTIME
79072805 1355 case OP_UTIME:
20408e3c
GS
1356 what = "utime";
1357 APPLY_TAINT_PROPER();
79072805 1358 if (sp - mark > 2) {
748a9306 1359#if defined(I_UTIME) || defined(VMS)
663a0e37
LW
1360 struct utimbuf utbuf;
1361#else
a687059c 1362 struct {
dd2821f6
GS
1363 Time_t actime;
1364 Time_t modtime;
a687059c 1365 } utbuf;
663a0e37 1366#endif
a687059c 1367
afd9f252 1368 Zero(&utbuf, sizeof utbuf, char);
517844ec 1369#ifdef BIG_TIME
dd2821f6
GS
1370 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1371 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
517844ec 1372#else
dd2821f6
GS
1373 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1374 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
517844ec 1375#endif
20408e3c 1376 APPLY_TAINT_PROPER();
79072805
LW
1377 tot = sp - mark;
1378 while (++mark <= sp) {
2d8e6c8d 1379 char *name = SvPVx(*mark, n_a);
20408e3c
GS
1380 APPLY_TAINT_PROPER();
1381 if (PerlLIO_utime(name, &utbuf))
a687059c
LW
1382 tot--;
1383 }
a687059c
LW
1384 }
1385 else
79072805 1386 tot = 0;
a687059c 1387 break;
a0d0e21e 1388#endif
a687059c
LW
1389 }
1390 return tot;
20408e3c 1391
20408e3c 1392#undef APPLY_TAINT_PROPER
a687059c
LW
1393}
1394
1395/* Do the permissions allow some operation? Assumes statcache already set. */
a0d0e21e 1396#ifndef VMS /* VMS' cando is in vms.c */
79072805 1397I32
864dbfa3 1398Perl_cando(pTHX_ I32 bit, I32 effective, register struct stat *statbufp)
a687059c 1399{
bee1dbe2 1400#ifdef DOSISH
fe14fcc3
LW
1401 /* [Comments and code from Len Reed]
1402 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1403 * to write-protected files. The execute permission bit is set
1404 * by the Miscrosoft C library stat() function for the following:
1405 * .exe files
1406 * .com files
1407 * .bat files
1408 * directories
1409 * All files and directories are readable.
1410 * Directories and special files, e.g. "CON", cannot be
1411 * write-protected.
1412 * [Comment by Tom Dinger -- a directory can have the write-protect
1413 * bit set in the file system, but DOS permits changes to
1414 * the directory anyway. In addition, all bets are off
1415 * here for networked software, such as Novell and
1416 * Sun's PC-NFS.]
1417 */
1418
bee1dbe2
LW
1419 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1420 * too so it will actually look into the files for magic numbers
1421 */
fe14fcc3
LW
1422 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1423
55497cff 1424#else /* ! DOSISH */
3280af22 1425 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
c623bd54
LW
1426 if (bit == S_IXUSR) {
1427 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
a687059c
LW
1428 return TRUE;
1429 }
1430 else
1431 return TRUE; /* root reads and writes anything */
1432 return FALSE;
1433 }
3280af22 1434 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
a687059c
LW
1435 if (statbufp->st_mode & bit)
1436 return TRUE; /* ok as "user" */
1437 }
79072805 1438 else if (ingroup((I32)statbufp->st_gid,effective)) {
a687059c
LW
1439 if (statbufp->st_mode & bit >> 3)
1440 return TRUE; /* ok as "group" */
1441 }
1442 else if (statbufp->st_mode & bit >> 6)
1443 return TRUE; /* ok as "other" */
1444 return FALSE;
55497cff 1445#endif /* ! DOSISH */
a687059c 1446}
a0d0e21e 1447#endif /* ! VMS */
a687059c 1448
79072805 1449I32
864dbfa3 1450Perl_ingroup(pTHX_ I32 testgid, I32 effective)
a687059c 1451{
3280af22 1452 if (testgid == (effective ? PL_egid : PL_gid))
a687059c 1453 return TRUE;
fe14fcc3 1454#ifdef HAS_GETGROUPS
a687059c
LW
1455#ifndef NGROUPS
1456#define NGROUPS 32
1457#endif
1458 {
a0d0e21e 1459 Groups_t gary[NGROUPS];
79072805 1460 I32 anum;
a687059c
LW
1461
1462 anum = getgroups(NGROUPS,gary);
1463 while (--anum >= 0)
1464 if (gary[anum] == testgid)
1465 return TRUE;
1466 }
1467#endif
1468 return FALSE;
1469}
c2ab57d4 1470
fe14fcc3 1471#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
c2ab57d4 1472
79072805 1473I32
864dbfa3 1474Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1475{
11343788 1476 dTHR;
c2ab57d4 1477 key_t key;
79072805 1478 I32 n, flags;
c2ab57d4 1479
463ee0b2
LW
1480 key = (key_t)SvNVx(*++mark);
1481 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1482 flags = SvIVx(*++mark);
748a9306 1483 SETERRNO(0,0);
c2ab57d4
LW
1484 switch (optype)
1485 {
fe14fcc3 1486#ifdef HAS_MSG
79072805 1487 case OP_MSGGET:
c2ab57d4 1488 return msgget(key, flags);
e5d73d77 1489#endif
fe14fcc3 1490#ifdef HAS_SEM
79072805 1491 case OP_SEMGET:
c2ab57d4 1492 return semget(key, n, flags);
e5d73d77 1493#endif
fe14fcc3 1494#ifdef HAS_SHM
79072805 1495 case OP_SHMGET:
c2ab57d4 1496 return shmget(key, n, flags);
e5d73d77 1497#endif
fe14fcc3 1498#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1499 default:
cea2e8a9 1500 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1501#endif
c2ab57d4
LW
1502 }
1503 return -1; /* should never happen */
1504}
1505
79072805 1506I32
864dbfa3 1507Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1508{
11343788 1509 dTHR;
79072805 1510 SV *astr;
c2ab57d4 1511 char *a;
a0d0e21e
LW
1512 I32 id, n, cmd, infosize, getinfo;
1513 I32 ret = -1;
c2ab57d4 1514
463ee0b2
LW
1515 id = SvIVx(*++mark);
1516 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1517 cmd = SvIVx(*++mark);
79072805 1518 astr = *++mark;
c2ab57d4
LW
1519 infosize = 0;
1520 getinfo = (cmd == IPC_STAT);
1521
1522 switch (optype)
1523 {
fe14fcc3 1524#ifdef HAS_MSG
79072805 1525 case OP_MSGCTL:
c2ab57d4
LW
1526 if (cmd == IPC_STAT || cmd == IPC_SET)
1527 infosize = sizeof(struct msqid_ds);
1528 break;
e5d73d77 1529#endif
fe14fcc3 1530#ifdef HAS_SHM
79072805 1531 case OP_SHMCTL:
c2ab57d4
LW
1532 if (cmd == IPC_STAT || cmd == IPC_SET)
1533 infosize = sizeof(struct shmid_ds);
1534 break;
e5d73d77 1535#endif
fe14fcc3 1536#ifdef HAS_SEM
79072805 1537 case OP_SEMCTL:
39398f3f 1538#ifdef Semctl
c2ab57d4
LW
1539 if (cmd == IPC_STAT || cmd == IPC_SET)
1540 infosize = sizeof(struct semid_ds);
1541 else if (cmd == GETALL || cmd == SETALL)
1542 {
8e591e46 1543 struct semid_ds semds;
bd89102f
AD
1544 union semun semun;
1545
84902520 1546 semun.buf = &semds;
c2ab57d4 1547 getinfo = (cmd == GETALL);
9b89d93d
GB
1548 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1549 return -1;
6e21c824
LW
1550 infosize = semds.sem_nsems * sizeof(short);
1551 /* "short" is technically wrong but much more portable
1552 than guessing about u_?short(_t)? */
c2ab57d4 1553 }
39398f3f 1554#else
cea2e8a9 1555 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 1556#endif
c2ab57d4 1557 break;
e5d73d77 1558#endif
fe14fcc3 1559#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
e5d73d77 1560 default:
cea2e8a9 1561 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
e5d73d77 1562#endif
c2ab57d4
LW
1563 }
1564
1565 if (infosize)
1566 {
a0d0e21e 1567 STRLEN len;
c2ab57d4
LW
1568 if (getinfo)
1569 {
a0d0e21e
LW
1570 SvPV_force(astr, len);
1571 a = SvGROW(astr, infosize+1);
c2ab57d4
LW
1572 }
1573 else
1574 {
463ee0b2
LW
1575 a = SvPV(astr, len);
1576 if (len != infosize)
cea2e8a9 1577 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
4ec43091
JH
1578 PL_op_desc[optype],
1579 (unsigned long)len,
1580 (long)infosize);
c2ab57d4
LW
1581 }
1582 }
1583 else
1584 {
c030ccd9 1585 IV i = SvIV(astr);
c2ab57d4
LW
1586 a = (char *)i; /* ouch */
1587 }
748a9306 1588 SETERRNO(0,0);
c2ab57d4
LW
1589 switch (optype)
1590 {
fe14fcc3 1591#ifdef HAS_MSG
79072805 1592 case OP_MSGCTL:
bee1dbe2 1593 ret = msgctl(id, cmd, (struct msqid_ds *)a);
c2ab57d4 1594 break;
e5d73d77 1595#endif
fe14fcc3 1596#ifdef HAS_SEM
bd89102f 1597 case OP_SEMCTL: {
39398f3f 1598#ifdef Semctl
bd89102f
AD
1599 union semun unsemds;
1600
1601 unsemds.buf = (struct semid_ds *)a;
1602 ret = Semctl(id, n, cmd, unsemds);
39398f3f 1603#else
cea2e8a9 1604 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
39398f3f 1605#endif
bd89102f 1606 }
c2ab57d4 1607 break;
e5d73d77 1608#endif
fe14fcc3 1609#ifdef HAS_SHM
79072805 1610 case OP_SHMCTL:
bee1dbe2 1611 ret = shmctl(id, cmd, (struct shmid_ds *)a);
c2ab57d4 1612 break;
e5d73d77 1613#endif
c2ab57d4
LW
1614 }
1615 if (getinfo && ret >= 0) {
79072805
LW
1616 SvCUR_set(astr, infosize);
1617 *SvEND(astr) = '\0';
a0d0e21e 1618 SvSETMAGIC(astr);
c2ab57d4
LW
1619 }
1620 return ret;
1621}
1622
79072805 1623I32
864dbfa3 1624Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
c2ab57d4 1625{
fe14fcc3 1626#ifdef HAS_MSG
11343788 1627 dTHR;
79072805 1628 SV *mstr;
c2ab57d4 1629 char *mbuf;
79072805 1630 I32 id, msize, flags;
463ee0b2 1631 STRLEN len;
c2ab57d4 1632
463ee0b2 1633 id = SvIVx(*++mark);
79072805 1634 mstr = *++mark;
463ee0b2
LW
1635 flags = SvIVx(*++mark);
1636 mbuf = SvPV(mstr, len);
1637 if ((msize = len - sizeof(long)) < 0)
cea2e8a9 1638 Perl_croak(aTHX_ "Arg too short for msgsnd");
748a9306 1639 SETERRNO(0,0);
bee1dbe2 1640 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
e5d73d77 1641#else
cea2e8a9 1642 Perl_croak(aTHX_ "msgsnd not implemented");
e5d73d77 1643#endif
c2ab57d4
LW
1644}
1645
79072805 1646I32
864dbfa3 1647Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
c2ab57d4 1648{
fe14fcc3 1649#ifdef HAS_MSG
11343788 1650 dTHR;
79072805 1651 SV *mstr;
c2ab57d4
LW
1652 char *mbuf;
1653 long mtype;
79072805 1654 I32 id, msize, flags, ret;
463ee0b2 1655 STRLEN len;
79072805 1656
463ee0b2 1657 id = SvIVx(*++mark);
79072805 1658 mstr = *++mark;
463ee0b2
LW
1659 msize = SvIVx(*++mark);
1660 mtype = (long)SvIVx(*++mark);
1661 flags = SvIVx(*++mark);
a0d0e21e
LW
1662 SvPV_force(mstr, len);
1663 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1664
748a9306 1665 SETERRNO(0,0);
bee1dbe2 1666 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
c2ab57d4 1667 if (ret >= 0) {
79072805
LW
1668 SvCUR_set(mstr, sizeof(long)+ret);
1669 *SvEND(mstr) = '\0';
c2ab57d4
LW
1670 }
1671 return ret;
e5d73d77 1672#else
cea2e8a9 1673 Perl_croak(aTHX_ "msgrcv not implemented");
e5d73d77 1674#endif
c2ab57d4
LW
1675}
1676
79072805 1677I32
864dbfa3 1678Perl_do_semop(pTHX_ SV **mark, SV **sp)
c2ab57d4 1679{
fe14fcc3 1680#ifdef HAS_SEM
11343788 1681 dTHR;
79072805 1682 SV *opstr;
c2ab57d4 1683 char *opbuf;
463ee0b2
LW
1684 I32 id;
1685 STRLEN opsize;
c2ab57d4 1686
463ee0b2 1687 id = SvIVx(*++mark);
79072805 1688 opstr = *++mark;
463ee0b2 1689 opbuf = SvPV(opstr, opsize);
c2ab57d4
LW
1690 if (opsize < sizeof(struct sembuf)
1691 || (opsize % sizeof(struct sembuf)) != 0) {
748a9306 1692 SETERRNO(EINVAL,LIB$_INVARG);
c2ab57d4
LW
1693 return -1;
1694 }
748a9306 1695 SETERRNO(0,0);
6e21c824 1696 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
e5d73d77 1697#else
cea2e8a9 1698 Perl_croak(aTHX_ "semop not implemented");
e5d73d77 1699#endif
c2ab57d4
LW
1700}
1701
79072805 1702I32
864dbfa3 1703Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
c2ab57d4 1704{
fe14fcc3 1705#ifdef HAS_SHM
11343788 1706 dTHR;
79072805 1707 SV *mstr;
c2ab57d4 1708 char *mbuf, *shm;
79072805 1709 I32 id, mpos, msize;
463ee0b2 1710 STRLEN len;
c2ab57d4 1711 struct shmid_ds shmds;
c2ab57d4 1712
463ee0b2 1713 id = SvIVx(*++mark);
79072805 1714 mstr = *++mark;
463ee0b2
LW
1715 mpos = SvIVx(*++mark);
1716 msize = SvIVx(*++mark);
748a9306 1717 SETERRNO(0,0);
c2ab57d4
LW
1718 if (shmctl(id, IPC_STAT, &shmds) == -1)
1719 return -1;
1720 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
748a9306 1721 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
c2ab57d4
LW
1722 return -1;
1723 }
8ac85365 1724 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
c2ab57d4
LW
1725 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1726 return -1;
79072805 1727 if (optype == OP_SHMREAD) {
a0d0e21e
LW
1728 SvPV_force(mstr, len);
1729 mbuf = SvGROW(mstr, msize+1);
1730
bee1dbe2 1731 Copy(shm + mpos, mbuf, msize, char);
79072805
LW
1732 SvCUR_set(mstr, msize);
1733 *SvEND(mstr) = '\0';
a0d0e21e 1734 SvSETMAGIC(mstr);
c2ab57d4
LW
1735 }
1736 else {
79072805 1737 I32 n;
c2ab57d4 1738
a0d0e21e 1739 mbuf = SvPV(mstr, len);
463ee0b2 1740 if ((n = len) > msize)
c2ab57d4 1741 n = msize;
bee1dbe2 1742 Copy(mbuf, shm + mpos, n, char);
c2ab57d4 1743 if (n < msize)
bee1dbe2 1744 memzero(shm + mpos + n, msize - n);
c2ab57d4
LW
1745 }
1746 return shmdt(shm);
e5d73d77 1747#else
cea2e8a9 1748 Perl_croak(aTHX_ "shm I/O not implemented");
e5d73d77 1749#endif
c2ab57d4
LW
1750}
1751
fe14fcc3 1752#endif /* SYSV IPC */
4e35701f 1753