3 * Copyright (c) 1991-1997, Larry Wall
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.
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."
20 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
30 # ifndef HAS_SHMAT_PROTOTYPE
31 extern Shmat_t shmat _((int, char *, int));
37 # if defined(_MSC_VER) || defined(__MINGW32__)
38 # include <sys/utime.h>
51 # define OPEN_EXCL O_EXCL
56 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
60 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
65 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
66 # include <sys/socket.h>
70 # include <net/errno.h>
75 /* Put this after #includes because <unistd.h> defines _XOPEN_*. */
77 # if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
78 # define Sock_size_t Size_t
80 # define Sock_size_t int
85 do_open(GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp)
87 register IO *io = GvIOn(gv);
88 PerlIO *saveifp = Nullfp;
89 PerlIO *saveofp = Nullfp;
95 bool was_fdopen = FALSE;
97 forkprocess = 1; /* assume true if no fork */
100 fd = PerlIO_fileno(IoIFP(io));
101 if (IoTYPE(io) == '-')
103 else if (fd <= maxsysfd) {
106 savetype = IoTYPE(io);
109 else if (IoTYPE(io) == '|')
110 result = PerlProc_pclose(IoIFP(io));
111 else if (IoIFP(io) != IoOFP(io)) {
113 result = PerlIO_close(IoOFP(io));
114 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
117 result = PerlIO_close(IoIFP(io));
120 result = PerlIO_close(IoIFP(io));
121 if (result == EOF && fd > maxsysfd)
122 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
124 IoOFP(io) = IoIFP(io) = Nullfp;
128 result = rawmode & 3;
129 IoTYPE(io) = "<>++"[result];
130 writing = (result > 0);
131 fd = PerlLIO_open3(name, rawmode, rawperm);
139 else if (rawmode & O_APPEND)
140 fpmode = (result == 1) ? "a" : "a+";
143 fpmode = (result == 1) ? "w" : "r+";
144 fp = PerlIO_fdopen(fd, fpmode);
151 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
154 myname = savepvn(name, len);
157 while (len && isSPACE(name[len-1]))
160 mode[0] = mode[1] = mode[2] = '\0';
162 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
170 for (name++; isSPACE(*name); name++) ;
173 TAINT_PROPER("piped open");
174 if (dowarn && name[strlen(name)-1] == '|')
175 warn("Can't do bidirectional pipe");
176 fp = PerlProc_popen(name,"w");
179 else if (*name == '>') {
180 TAINT_PROPER("open");
183 mode[0] = IoTYPE(io) = 'a';
198 if (!*name && supplied_fp)
202 for (; isSPACE(*name); name++) ;
207 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
211 SETERRNO(EINVAL,SS$_IVCHAN);
216 fd = PerlIO_fileno(IoIFP(thatio));
217 if (IoTYPE(thatio) == 's')
224 fd = PerlLIO_dup(fd);
227 if (!(fp = PerlIO_fdopen(fd,mode))) {
235 for (; isSPACE(*name); name++) ;
236 if (strEQ(name,"-")) {
237 fp = PerlIO_stdout();
241 fp = PerlIO_open(name,mode);
245 else if (*name == '<') {
247 for (name++; isSPACE(*name); name++) ;
251 if (strEQ(name,"-")) {
256 fp = PerlIO_open(name,mode);
258 else if (name[len-1] == '|') {
260 while (len && isSPACE(name[len-1]))
263 for (; isSPACE(*name); name++) ;
266 TAINT_PROPER("piped open");
267 fp = PerlProc_popen(name,"r");
273 for (; isSPACE(*name); name++) ;
274 if (strEQ(name,"-")) {
279 fp = PerlIO_open(name,"r");
283 if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
284 warn(warn_nl, "open");
288 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
290 if (PerlLIO_fstat(PerlIO_fileno(fp),&statbuf) < 0) {
291 (void)PerlIO_close(fp);
294 if (S_ISSOCK(statbuf.st_mode))
295 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
299 !(statbuf.st_mode & S_IFMT)
305 Sock_size_t buflen = sizeof tmpbuf;
306 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
308 || errno != ENOTSOCK)
309 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
310 /* but some return 0 for streams too, sigh */
314 if (saveifp) { /* must use old fp? */
315 fd = PerlIO_fileno(saveifp);
317 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
318 if (saveofp != saveifp) { /* was a socket? */
319 PerlIO_close(saveofp);
324 if (fd != PerlIO_fileno(fp)) {
328 PerlLIO_dup2(PerlIO_fileno(fp), fd);
329 sv = *av_fetch(fdpid,PerlIO_fileno(fp),TRUE);
330 (void)SvUPGRADE(sv, SVt_IV);
333 sv = *av_fetch(fdpid,fd,TRUE);
334 (void)SvUPGRADE(sv, SVt_IV);
343 #if defined(HAS_FCNTL) && defined(F_SETFD)
344 fd = PerlIO_fileno(fp);
345 fcntl(fd,F_SETFD,fd > maxsysfd);
350 if (IoTYPE(io) == 's'
351 || (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) {
352 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
366 IoTYPE(io) = savetype;
371 nextargv(register GV *gv)
374 #ifndef FLEXFILENAMES
382 argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
383 if (filemode & (S_ISUID|S_ISGID)) {
384 PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
386 (void)fchmod(lastfd,filemode);
388 (void)PerlLIO_chmod(oldname,filemode);
392 while (av_len(GvAV(gv)) >= 0) {
395 sv = av_shift(GvAV(gv));
397 sv_setsv(GvSV(gv),sv);
398 SvSETMAGIC(GvSV(gv));
399 oldname = SvPVx(GvSV(gv), oldlen);
400 if (do_open(gv,oldname,oldlen,inplace!=0,0,0,Nullfp)) {
402 TAINT_PROPER("inplace open");
403 if (oldlen == 1 && *oldname == '-') {
404 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
405 return IoIFP(GvIOp(gv));
407 #ifndef FLEXFILENAMES
408 filedev = statbuf.st_dev;
409 fileino = statbuf.st_ino;
411 filemode = statbuf.st_mode;
412 fileuid = statbuf.st_uid;
413 filegid = statbuf.st_gid;
414 if (!S_ISREG(filemode)) {
415 warn("Can't do inplace edit: %s is not a regular file",
422 add_suffix(sv,inplace);
424 sv_catpv(sv,inplace);
426 #ifndef FLEXFILENAMES
427 if (PerlLIO_stat(SvPVX(sv),&statbuf) >= 0
428 && statbuf.st_dev == filedev
429 && statbuf.st_ino == fileino
431 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
434 warn("Can't do inplace edit: %s would not be uniq",
442 if (PerlLIO_rename(oldname,SvPVX(sv)) < 0) {
443 warn("Can't rename %s to %s: %s, skipping file",
444 oldname, SvPVX(sv), Strerror(errno) );
450 (void)PerlLIO_unlink(SvPVX(sv));
451 (void)PerlLIO_rename(oldname,SvPVX(sv));
452 do_open(gv,SvPVX(sv),SvCUR(sv),inplace!=0,0,0,Nullfp);
455 (void)UNLINK(SvPVX(sv));
456 if (link(oldname,SvPVX(sv)) < 0) {
457 warn("Can't rename %s to %s: %s, skipping file",
458 oldname, SvPVX(sv), Strerror(errno) );
462 (void)UNLINK(oldname);
466 #if !defined(DOSISH) && !defined(AMIGAOS)
467 # ifndef VMS /* Don't delete; use automatic file versioning */
468 if (UNLINK(oldname) < 0) {
469 warn("Can't remove %s: %s, skipping file",
470 oldname, Strerror(errno) );
476 croak("Can't do inplace edit without backup");
480 sv_setpvn(sv,">",!inplace);
481 sv_catpvn(sv,oldname,oldlen);
482 SETERRNO(0,0); /* in case sprintf set errno */
483 if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),inplace!=0,
484 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
485 warn("Can't do inplace edit on %s: %s",
486 oldname, Strerror(errno) );
490 setdefout(argvoutgv);
491 lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
492 (void)PerlLIO_fstat(lastfd,&statbuf);
494 (void)fchmod(lastfd,filemode);
496 # if !(defined(WIN32) && defined(__BORLANDC__))
497 /* Borland runtime creates a readonly file! */
498 (void)PerlLIO_chmod(oldname,filemode);
501 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
503 (void)fchown(lastfd,fileuid,filegid);
506 (void)chown(oldname,fileuid,filegid);
511 return IoIFP(GvIOp(gv));
514 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
515 SvPV(sv, na), Strerror(errno));
518 (void)do_close(argvoutgv,FALSE);
519 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
526 do_pipe(SV *sv, GV *rgv, GV *wgv)
545 if (PerlProc_pipe(fd) < 0)
547 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
548 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
549 IoIFP(wstio) = IoOFP(wstio);
552 if (!IoIFP(rstio) || !IoOFP(wstio)) {
553 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
554 else PerlLIO_close(fd[0]);
555 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
556 else PerlLIO_close(fd[1]);
560 sv_setsv(sv,&sv_yes);
564 sv_setsv(sv,&sv_undef);
569 /* explicit renamed to avoid C++ conflict -- kja */
571 do_close(GV *gv, bool not_implicit)
578 if (!gv || SvTYPE(gv) != SVt_PVGV) {
579 SETERRNO(EBADF,SS$_IVCHAN);
583 if (!io) { /* never opened */
584 if (dowarn && not_implicit)
585 warn("Close on unopened file <%s>",GvENAME(gv));
588 retval = io_close(io);
592 IoLINES_LEFT(io) = IoPAGE_LEN(io);
605 if (IoTYPE(io) == '|') {
606 status = PerlProc_pclose(IoIFP(io));
607 STATUS_NATIVE_SET(status);
608 retval = (STATUS_POSIX == 0);
610 else if (IoTYPE(io) == '-')
613 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
614 retval = (PerlIO_close(IoOFP(io)) != EOF);
615 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
618 retval = (PerlIO_close(IoIFP(io)) != EOF);
620 IoOFP(io) = IoIFP(io) = Nullfp;
640 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
641 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
642 return FALSE; /* this is the most usual case */
645 ch = PerlIO_getc(IoIFP(io));
647 (void)PerlIO_ungetc(IoIFP(io),ch);
650 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
651 if (PerlIO_get_cnt(IoIFP(io)) < -1)
652 PerlIO_set_cnt(IoIFP(io),-1);
654 if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
655 if (!nextargv(argvgv)) /* get another fp handy */
659 return TRUE; /* normal fp, definitely end of file */
670 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
671 #ifdef ULTRIX_STDIO_BOTCH
673 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
675 return PerlIO_tell(fp);
678 warn("tell() on unopened file");
679 SETERRNO(EBADF,RMS$_IFI);
684 do_seek(GV *gv, long int pos, int whence)
689 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
690 #ifdef ULTRIX_STDIO_BOTCH
692 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
694 return PerlIO_seek(fp, pos, whence) >= 0;
697 warn("seek() on unopened file");
698 SETERRNO(EBADF,RMS$_IFI);
703 do_sysseek(GV *gv, long int pos, int whence)
708 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
709 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
711 warn("sysseek() on unopened file");
712 SETERRNO(EBADF,RMS$_IFI);
716 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
717 /* code courtesy of William Kucharski */
720 I32 my_chsize(fd, length)
721 I32 fd; /* file descriptor */
722 Off_t length; /* length to set file to */
727 if (PerlLIO_fstat(fd, &filebuf) < 0)
730 if (filebuf.st_size < length) {
732 /* extend file length */
734 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
737 /* write a "0" byte */
739 if ((PerlLIO_write(fd, "", 1)) != 1)
743 /* truncate length */
748 fl.l_type = F_WRLCK; /* write lock on file space */
751 * This relies on the UNDOCUMENTED F_FREESP argument to
752 * fcntl(2), which truncates the file so that it ends at the
753 * position indicated by fl.l_start.
755 * Will minor miracles never cease?
758 if (fcntl(fd, F_FREESP, &fl) < 0)
765 #endif /* F_FREESP */
768 do_print(register SV *sv, PerlIO *fp)
773 /* assuming fp is checked earlier */
779 if (SvIOK(sv) && SvIVX(sv) != 0) {
780 PerlIO_printf(fp, ofmt, (double)SvIVX(sv));
781 return !PerlIO_error(fp);
783 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
784 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
785 PerlIO_printf(fp, ofmt, SvNVX(sv));
786 return !PerlIO_error(fp);
789 switch (SvTYPE(sv)) {
798 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
799 return !PerlIO_error(fp);
803 tmps = SvPV(sv, len);
806 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
808 return !PerlIO_error(fp);
818 if (op->op_flags & OPf_REF) {
820 tmpgv = cGVOP->op_gv;
823 if (io && IoIFP(io)) {
825 sv_setpv(statname,"");
827 return (laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &statcache));
833 warn("Stat on unopened file <%s>",
836 sv_setpv(statname,"");
837 return (laststatval = -1);
843 if (SvTYPE(sv) == SVt_PVGV) {
847 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
848 tmpgv = (GV*)SvRV(sv);
853 sv_setpv(statname,SvPV(sv, na));
855 laststatval = PerlLIO_stat(SvPV(sv, na),&statcache);
856 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
857 warn(warn_nl, "stat");
867 if (op->op_flags & OPf_REF) {
869 if (cGVOP->op_gv == defgv) {
870 if (laststype != OP_LSTAT)
871 croak("The stat preceding -l _ wasn't an lstat");
874 croak("You can't use -l on a filehandle");
877 laststype = OP_LSTAT;
881 sv_setpv(statname,SvPV(sv, na));
883 laststatval = PerlLIO_lstat(SvPV(sv, na),&statcache);
885 laststatval = PerlLIO_stat(SvPV(sv, na),&statcache);
887 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
888 warn(warn_nl, "lstat");
893 do_aexec(SV *really, register SV **mark, register SV **sp)
900 New(401,Argv, sp - mark + 1, char*);
902 while (++mark <= sp) {
904 *a++ = SvPVx(*mark, na);
909 if (*Argv[0] != '/') /* will execvp use PATH? */
910 TAINT_ENV(); /* testing IFS here is overkill, probably */
911 if (really && *(tmps = SvPV(really, na)))
912 PerlProc_execvp(tmps,Argv);
914 PerlProc_execvp(Argv[0],Argv);
916 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
927 Argv = Null(char **);
935 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP)
944 while (*cmd && isSPACE(*cmd))
947 /* save an extra exec if possible */
950 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
968 PerlProc_execl(cshname,"csh", flags,ncmd,(char*)0);
976 /* see if there are shell metacharacters in it */
978 if (*cmd == '.' && isSPACE(cmd[1]))
981 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
984 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
988 for (s = cmd; *s; s++) {
989 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
990 if (*s == '\n' && !s[1]) {
995 PerlProc_execl(sh_path, "sh", "-c", cmd, (char*)0);
1000 New(402,Argv, (s - cmd) / 2 + 2, char*);
1001 Cmd = savepvn(cmd, s-cmd);
1003 for (s = Cmd; *s;) {
1004 while (*s && isSPACE(*s)) s++;
1007 while (*s && !isSPACE(*s)) s++;
1013 PerlProc_execvp(Argv[0],Argv);
1014 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1019 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
1025 #endif /* OS2 || WIN32 */
1028 apply(I32 type, register SV **mark, register SV **sp)
1033 register I32 tot = 0;
1035 SV **oldmark = mark;
1038 while (++mark <= sp) {
1039 if (SvTAINTED(*mark)) {
1048 TAINT_PROPER("chmod");
1052 while (++mark <= sp) {
1053 if (PerlLIO_chmod(SvPVx(*mark, na),val))
1060 TAINT_PROPER("chown");
1061 if (sp - mark > 2) {
1062 val = SvIVx(*++mark);
1063 val2 = SvIVx(*++mark);
1065 while (++mark <= sp) {
1066 if (chown(SvPVx(*mark, na),val,val2))
1074 TAINT_PROPER("kill");
1077 s = SvPVx(*++mark, na);
1080 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1082 if (!(val = whichsig(s)))
1083 croak("Unrecognized signal name \"%s\"",s);
1088 /* kill() doesn't do process groups (job trees?) under VMS */
1089 if (val < 0) val = -val;
1090 if (val == SIGKILL) {
1091 # include <starlet.h>
1092 /* Use native sys$delprc() to insure that target process is
1093 * deleted; supervisor-mode images don't pay attention to
1094 * CRTL's emulation of Unix-style signals and kill()
1096 while (++mark <= sp) {
1097 I32 proc = SvIVx(*mark);
1098 register unsigned long int __vmssts;
1099 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1103 case SS$_NOSUCHNODE:
1104 SETERRNO(ESRCH,__vmssts);
1107 SETERRNO(EPERM,__vmssts);
1110 SETERRNO(EVMSERR,__vmssts);
1119 while (++mark <= sp) {
1120 I32 proc = SvIVx(*mark);
1122 if (PerlProc_killpg(proc,val)) /* BSD */
1124 if (PerlProc_kill(-proc,val)) /* SYSV */
1130 while (++mark <= sp) {
1131 if (PerlProc_kill(SvIVx(*mark),val))
1138 TAINT_PROPER("unlink");
1140 while (++mark <= sp) {
1141 s = SvPVx(*mark, na);
1142 if (euid || unsafe) {
1146 else { /* don't let root wipe out directories without -U */
1148 if (PerlLIO_lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1150 if (PerlLIO_stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1162 TAINT_PROPER("utime");
1163 if (sp - mark > 2) {
1164 #if defined(I_UTIME) || defined(VMS)
1165 struct utimbuf utbuf;
1173 Zero(&utbuf, sizeof utbuf, char);
1175 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1176 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1178 utbuf.actime = SvIVx(*++mark); /* time accessed */
1179 utbuf.modtime = SvIVx(*++mark); /* time modified */
1182 while (++mark <= sp) {
1183 if (PerlLIO_utime(SvPVx(*mark, na),&utbuf))
1195 /* Do the permissions allow some operation? Assumes statcache already set. */
1196 #ifndef VMS /* VMS' cando is in vms.c */
1198 cando(I32 bit, I32 effective, register struct stat *statbufp)
1201 /* [Comments and code from Len Reed]
1202 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1203 * to write-protected files. The execute permission bit is set
1204 * by the Miscrosoft C library stat() function for the following:
1209 * All files and directories are readable.
1210 * Directories and special files, e.g. "CON", cannot be
1212 * [Comment by Tom Dinger -- a directory can have the write-protect
1213 * bit set in the file system, but DOS permits changes to
1214 * the directory anyway. In addition, all bets are off
1215 * here for networked software, such as Novell and
1219 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1220 * too so it will actually look into the files for magic numbers
1222 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1224 #else /* ! DOSISH */
1225 if ((effective ? euid : uid) == 0) { /* root is special */
1226 if (bit == S_IXUSR) {
1227 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1231 return TRUE; /* root reads and writes anything */
1234 if (statbufp->st_uid == (effective ? euid : uid) ) {
1235 if (statbufp->st_mode & bit)
1236 return TRUE; /* ok as "user" */
1238 else if (ingroup((I32)statbufp->st_gid,effective)) {
1239 if (statbufp->st_mode & bit >> 3)
1240 return TRUE; /* ok as "group" */
1242 else if (statbufp->st_mode & bit >> 6)
1243 return TRUE; /* ok as "other" */
1245 #endif /* ! DOSISH */
1250 ingroup(I32 testgid, I32 effective)
1252 if (testgid == (effective ? egid : gid))
1254 #ifdef HAS_GETGROUPS
1259 Groups_t gary[NGROUPS];
1262 anum = getgroups(NGROUPS,gary);
1264 if (gary[anum] == testgid)
1271 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1274 do_ipcget(I32 optype, SV **mark, SV **sp)
1280 key = (key_t)SvNVx(*++mark);
1281 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1282 flags = SvIVx(*++mark);
1288 return msgget(key, flags);
1292 return semget(key, n, flags);
1296 return shmget(key, n, flags);
1298 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1300 croak("%s not implemented", op_desc[optype]);
1303 return -1; /* should never happen */
1307 do_ipcctl(I32 optype, SV **mark, SV **sp)
1312 I32 id, n, cmd, infosize, getinfo;
1314 #ifdef __linux__ /* XXX Need metaconfig test */
1315 union semun unsemds;
1318 id = SvIVx(*++mark);
1319 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1320 cmd = SvIVx(*++mark);
1323 getinfo = (cmd == IPC_STAT);
1329 if (cmd == IPC_STAT || cmd == IPC_SET)
1330 infosize = sizeof(struct msqid_ds);
1335 if (cmd == IPC_STAT || cmd == IPC_SET)
1336 infosize = sizeof(struct shmid_ds);
1341 if (cmd == IPC_STAT || cmd == IPC_SET)
1342 infosize = sizeof(struct semid_ds);
1343 else if (cmd == GETALL || cmd == SETALL)
1345 struct semid_ds semds;
1346 #ifdef __linux__ /* XXX Need metaconfig test */
1347 /* linux (and Solaris2?) uses :
1348 int semctl (int semid, int semnum, int cmd, union semun arg)
1351 struct semid_ds *buf;
1357 if (semctl(id, 0, IPC_STAT, semun) == -1)
1359 if (semctl(id, 0, IPC_STAT, &semds) == -1)
1362 getinfo = (cmd == GETALL);
1363 infosize = semds.sem_nsems * sizeof(short);
1364 /* "short" is technically wrong but much more portable
1365 than guessing about u_?short(_t)? */
1369 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1371 croak("%s not implemented", op_desc[optype]);
1380 SvPV_force(astr, len);
1381 a = SvGROW(astr, infosize+1);
1385 a = SvPV(astr, len);
1386 if (len != infosize)
1387 croak("Bad arg length for %s, is %lu, should be %ld",
1388 op_desc[optype], (unsigned long)len, (long)infosize);
1394 a = (char *)i; /* ouch */
1401 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1406 #ifdef __linux__ /* XXX Need metaconfig test */
1407 unsemds.buf = (struct semid_ds *)a;
1408 ret = semctl(id, n, cmd, unsemds);
1410 ret = semctl(id, n, cmd, (struct semid_ds *)a);
1416 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1420 if (getinfo && ret >= 0) {
1421 SvCUR_set(astr, infosize);
1422 *SvEND(astr) = '\0';
1429 do_msgsnd(SV **mark, SV **sp)
1435 I32 id, msize, flags;
1438 id = SvIVx(*++mark);
1440 flags = SvIVx(*++mark);
1441 mbuf = SvPV(mstr, len);
1442 if ((msize = len - sizeof(long)) < 0)
1443 croak("Arg too short for msgsnd");
1445 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1447 croak("msgsnd not implemented");
1452 do_msgrcv(SV **mark, SV **sp)
1459 I32 id, msize, flags, ret;
1462 id = SvIVx(*++mark);
1464 msize = SvIVx(*++mark);
1465 mtype = (long)SvIVx(*++mark);
1466 flags = SvIVx(*++mark);
1467 if (SvTHINKFIRST(mstr)) {
1468 if (SvREADONLY(mstr))
1469 croak("Can't msgrcv to readonly var");
1473 SvPV_force(mstr, len);
1474 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1477 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1479 SvCUR_set(mstr, sizeof(long)+ret);
1480 *SvEND(mstr) = '\0';
1484 croak("msgrcv not implemented");
1489 do_semop(SV **mark, SV **sp)
1498 id = SvIVx(*++mark);
1500 opbuf = SvPV(opstr, opsize);
1501 if (opsize < sizeof(struct sembuf)
1502 || (opsize % sizeof(struct sembuf)) != 0) {
1503 SETERRNO(EINVAL,LIB$_INVARG);
1507 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1509 croak("semop not implemented");
1514 do_shmio(I32 optype, SV **mark, SV **sp)
1520 I32 id, mpos, msize;
1522 struct shmid_ds shmds;
1524 id = SvIVx(*++mark);
1526 mpos = SvIVx(*++mark);
1527 msize = SvIVx(*++mark);
1529 if (shmctl(id, IPC_STAT, &shmds) == -1)
1531 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1532 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1535 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1536 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1538 if (optype == OP_SHMREAD) {
1539 SvPV_force(mstr, len);
1540 mbuf = SvGROW(mstr, msize+1);
1542 Copy(shm + mpos, mbuf, msize, char);
1543 SvCUR_set(mstr, msize);
1544 *SvEND(mstr) = '\0';
1550 mbuf = SvPV(mstr, len);
1551 if ((n = len) > msize)
1553 Copy(mbuf, shm + mpos, n, char);
1555 memzero(shm + mpos + n, msize - n);
1559 croak("shm I/O not implemented");
1563 #endif /* SYSV IPC */