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;
96 forkprocess = 1; /* assume true if no fork */
99 fd = PerlIO_fileno(IoIFP(io));
100 if (IoTYPE(io) == '-')
102 else if (fd <= maxsysfd) {
105 savetype = IoTYPE(io);
108 else if (IoTYPE(io) == '|')
109 result = PerlProc_pclose(IoIFP(io));
110 else if (IoIFP(io) != IoOFP(io)) {
112 result = PerlIO_close(IoOFP(io));
113 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
116 result = PerlIO_close(IoIFP(io));
119 result = PerlIO_close(IoIFP(io));
120 if (result == EOF && fd > maxsysfd)
121 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
123 IoOFP(io) = IoIFP(io) = Nullfp;
127 result = rawmode & 3;
128 IoTYPE(io) = "<>++"[result];
129 writing = (result > 0);
130 fd = PerlLIO_open3(name, rawmode, rawperm);
138 else if (rawmode & O_APPEND)
139 fpmode = (result == 1) ? "a" : "a+";
142 fpmode = (result == 1) ? "w" : "r+";
143 fp = PerlIO_fdopen(fd, fpmode);
150 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
153 myname = savepvn(name, len);
156 while (len && isSPACE(name[len-1]))
159 mode[0] = mode[1] = mode[2] = '\0';
161 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
169 for (name++; isSPACE(*name); name++) ;
172 TAINT_PROPER("piped open");
173 if (dowarn && name[strlen(name)-1] == '|')
174 warn("Can't do bidirectional pipe");
175 fp = PerlProc_popen(name,"w");
178 else if (*name == '>') {
179 TAINT_PROPER("open");
182 mode[0] = IoTYPE(io) = 'a';
197 if (!*name && supplied_fp)
201 for (; isSPACE(*name); name++) ;
206 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
210 SETERRNO(EINVAL,SS$_IVCHAN);
215 fd = PerlIO_fileno(IoIFP(thatio));
216 if (IoTYPE(thatio) == 's')
223 fd = PerlLIO_dup(fd);
224 if (!(fp = PerlIO_fdopen(fd,mode))) {
232 for (; isSPACE(*name); name++) ;
233 if (strEQ(name,"-")) {
234 fp = PerlIO_stdout();
238 fp = PerlIO_open(name,mode);
242 else if (*name == '<') {
244 for (name++; isSPACE(*name); name++) ;
248 if (strEQ(name,"-")) {
253 fp = PerlIO_open(name,mode);
255 else if (name[len-1] == '|') {
257 while (len && isSPACE(name[len-1]))
260 for (; isSPACE(*name); name++) ;
263 TAINT_PROPER("piped open");
264 fp = PerlProc_popen(name,"r");
270 for (; isSPACE(*name); name++) ;
271 if (strEQ(name,"-")) {
276 fp = PerlIO_open(name,"r");
280 if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
281 warn(warn_nl, "open");
285 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
287 if (PerlLIO_fstat(PerlIO_fileno(fp),&statbuf) < 0) {
288 (void)PerlIO_close(fp);
291 if (S_ISSOCK(statbuf.st_mode))
292 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
296 !(statbuf.st_mode & S_IFMT)
302 Sock_size_t buflen = sizeof tmpbuf;
303 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
305 || errno != ENOTSOCK)
306 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
307 /* but some return 0 for streams too, sigh */
311 if (saveifp) { /* must use old fp? */
312 fd = PerlIO_fileno(saveifp);
314 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
315 if (saveofp != saveifp) { /* was a socket? */
316 PerlIO_close(saveofp);
321 if (fd != PerlIO_fileno(fp)) {
325 PerlLIO_dup2(PerlIO_fileno(fp), fd);
326 sv = *av_fetch(fdpid,PerlIO_fileno(fp),TRUE);
327 (void)SvUPGRADE(sv, SVt_IV);
330 sv = *av_fetch(fdpid,fd,TRUE);
331 (void)SvUPGRADE(sv, SVt_IV);
339 #if defined(HAS_FCNTL) && defined(F_SETFD)
340 fd = PerlIO_fileno(fp);
341 fcntl(fd,F_SETFD,fd > maxsysfd);
346 if (IoTYPE(io) == 's'
347 || (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) {
348 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
362 IoTYPE(io) = savetype;
367 nextargv(register GV *gv)
370 #ifndef FLEXFILENAMES
378 argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
379 if (filemode & (S_ISUID|S_ISGID)) {
380 PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
382 (void)fchmod(lastfd,filemode);
384 (void)PerlLIO_chmod(oldname,filemode);
388 while (av_len(GvAV(gv)) >= 0) {
391 sv = av_shift(GvAV(gv));
393 sv_setsv(GvSV(gv),sv);
394 SvSETMAGIC(GvSV(gv));
395 oldname = SvPVx(GvSV(gv), oldlen);
396 if (do_open(gv,oldname,oldlen,inplace!=0,0,0,Nullfp)) {
398 TAINT_PROPER("inplace open");
399 if (oldlen == 1 && *oldname == '-') {
400 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
401 return IoIFP(GvIOp(gv));
403 #ifndef FLEXFILENAMES
404 filedev = statbuf.st_dev;
405 fileino = statbuf.st_ino;
407 filemode = statbuf.st_mode;
408 fileuid = statbuf.st_uid;
409 filegid = statbuf.st_gid;
410 if (!S_ISREG(filemode)) {
411 warn("Can't do inplace edit: %s is not a regular file",
418 add_suffix(sv,inplace);
420 sv_catpv(sv,inplace);
422 #ifndef FLEXFILENAMES
423 if (PerlLIO_stat(SvPVX(sv),&statbuf) >= 0
424 && statbuf.st_dev == filedev
425 && statbuf.st_ino == fileino
427 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
430 warn("Can't do inplace edit: %s would not be uniq",
438 if (PerlLIO_rename(oldname,SvPVX(sv)) < 0) {
439 warn("Can't rename %s to %s: %s, skipping file",
440 oldname, SvPVX(sv), Strerror(errno) );
446 (void)PerlLIO_unlink(SvPVX(sv));
447 (void)PerlLIO_rename(oldname,SvPVX(sv));
448 do_open(gv,SvPVX(sv),SvCUR(sv),inplace!=0,0,0,Nullfp);
451 (void)UNLINK(SvPVX(sv));
452 if (link(oldname,SvPVX(sv)) < 0) {
453 warn("Can't rename %s to %s: %s, skipping file",
454 oldname, SvPVX(sv), Strerror(errno) );
458 (void)UNLINK(oldname);
462 #if !defined(DOSISH) && !defined(AMIGAOS)
463 # ifndef VMS /* Don't delete; use automatic file versioning */
464 if (UNLINK(oldname) < 0) {
465 warn("Can't remove %s: %s, skipping file",
466 oldname, Strerror(errno) );
472 croak("Can't do inplace edit without backup");
476 sv_setpvn(sv,">",!inplace);
477 sv_catpvn(sv,oldname,oldlen);
478 SETERRNO(0,0); /* in case sprintf set errno */
479 if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),inplace!=0,
480 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
481 warn("Can't do inplace edit on %s: %s",
482 oldname, Strerror(errno) );
486 setdefout(argvoutgv);
487 lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
488 (void)PerlLIO_fstat(lastfd,&statbuf);
490 (void)fchmod(lastfd,filemode);
492 # if !(defined(WIN32) && defined(__BORLANDC__))
493 /* Borland runtime creates a readonly file! */
494 (void)PerlLIO_chmod(oldname,filemode);
497 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
499 (void)fchown(lastfd,fileuid,filegid);
502 (void)chown(oldname,fileuid,filegid);
507 return IoIFP(GvIOp(gv));
510 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
511 SvPV(sv, na), Strerror(errno));
514 (void)do_close(argvoutgv,FALSE);
515 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
522 do_pipe(SV *sv, GV *rgv, GV *wgv)
541 if (PerlProc_pipe(fd) < 0)
543 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
544 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
545 IoIFP(wstio) = IoOFP(wstio);
548 if (!IoIFP(rstio) || !IoOFP(wstio)) {
549 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
550 else PerlLIO_close(fd[0]);
551 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
552 else PerlLIO_close(fd[1]);
556 sv_setsv(sv,&sv_yes);
560 sv_setsv(sv,&sv_undef);
565 /* explicit renamed to avoid C++ conflict -- kja */
567 #ifndef CAN_PROTOTYPE
568 do_close(gv,not_implicit)
572 do_close(GV *gv, bool not_implicit)
573 #endif /* CAN_PROTOTYPE */
580 if (!gv || SvTYPE(gv) != SVt_PVGV) {
581 SETERRNO(EBADF,SS$_IVCHAN);
585 if (!io) { /* never opened */
586 if (dowarn && not_implicit)
587 warn("Close on unopened file <%s>",GvENAME(gv));
590 retval = io_close(io);
594 IoLINES_LEFT(io) = IoPAGE_LEN(io);
607 if (IoTYPE(io) == '|') {
608 status = PerlProc_pclose(IoIFP(io));
609 STATUS_NATIVE_SET(status);
610 retval = (STATUS_POSIX == 0);
612 else if (IoTYPE(io) == '-')
615 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
616 retval = (PerlIO_close(IoOFP(io)) != EOF);
617 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
620 retval = (PerlIO_close(IoIFP(io)) != EOF);
622 IoOFP(io) = IoIFP(io) = Nullfp;
642 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
643 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
644 return FALSE; /* this is the most usual case */
647 ch = PerlIO_getc(IoIFP(io));
649 (void)PerlIO_ungetc(IoIFP(io),ch);
652 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
653 if (PerlIO_get_cnt(IoIFP(io)) < -1)
654 PerlIO_set_cnt(IoIFP(io),-1);
656 if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
657 if (!nextargv(argvgv)) /* get another fp handy */
661 return TRUE; /* normal fp, definitely end of file */
672 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
673 #ifdef ULTRIX_STDIO_BOTCH
675 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
677 return PerlIO_tell(fp);
680 warn("tell() on unopened file");
681 SETERRNO(EBADF,RMS$_IFI);
686 do_seek(GV *gv, long int pos, int whence)
691 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
692 #ifdef ULTRIX_STDIO_BOTCH
694 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
696 return PerlIO_seek(fp, pos, whence) >= 0;
699 warn("seek() on unopened file");
700 SETERRNO(EBADF,RMS$_IFI);
705 do_sysseek(GV *gv, long int pos, int whence)
710 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
711 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
713 warn("sysseek() on unopened file");
714 SETERRNO(EBADF,RMS$_IFI);
718 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
719 /* code courtesy of William Kucharski */
722 I32 my_chsize(fd, length)
723 I32 fd; /* file descriptor */
724 Off_t length; /* length to set file to */
729 if (PerlLIO_fstat(fd, &filebuf) < 0)
732 if (filebuf.st_size < length) {
734 /* extend file length */
736 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
739 /* write a "0" byte */
741 if ((PerlLIO_write(fd, "", 1)) != 1)
745 /* truncate length */
750 fl.l_type = F_WRLCK; /* write lock on file space */
753 * This relies on the UNDOCUMENTED F_FREESP argument to
754 * fcntl(2), which truncates the file so that it ends at the
755 * position indicated by fl.l_start.
757 * Will minor miracles never cease?
760 if (fcntl(fd, F_FREESP, &fl) < 0)
767 #endif /* F_FREESP */
770 do_print(register SV *sv, PerlIO *fp)
775 /* assuming fp is checked earlier */
781 if (SvIOK(sv) && SvIVX(sv) != 0) {
782 PerlIO_printf(fp, ofmt, (double)SvIVX(sv));
783 return !PerlIO_error(fp);
785 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
786 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
787 PerlIO_printf(fp, ofmt, SvNVX(sv));
788 return !PerlIO_error(fp);
791 switch (SvTYPE(sv)) {
800 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
801 return !PerlIO_error(fp);
805 tmps = SvPV(sv, len);
808 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
810 return !PerlIO_error(fp);
820 if (op->op_flags & OPf_REF) {
822 tmpgv = cGVOP->op_gv;
825 if (io && IoIFP(io)) {
827 sv_setpv(statname,"");
829 return (laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &statcache));
835 warn("Stat on unopened file <%s>",
838 sv_setpv(statname,"");
839 return (laststatval = -1);
845 if (SvTYPE(sv) == SVt_PVGV) {
849 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
850 tmpgv = (GV*)SvRV(sv);
855 sv_setpv(statname,SvPV(sv, na));
857 laststatval = PerlLIO_stat(SvPV(sv, na),&statcache);
858 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
859 warn(warn_nl, "stat");
869 if (op->op_flags & OPf_REF) {
871 if (cGVOP->op_gv == defgv) {
872 if (laststype != OP_LSTAT)
873 croak("The stat preceding -l _ wasn't an lstat");
876 croak("You can't use -l on a filehandle");
879 laststype = OP_LSTAT;
883 sv_setpv(statname,SvPV(sv, na));
885 laststatval = PerlLIO_lstat(SvPV(sv, na),&statcache);
887 laststatval = PerlLIO_stat(SvPV(sv, na),&statcache);
889 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
890 warn(warn_nl, "lstat");
895 do_aexec(SV *really, register SV **mark, register SV **sp)
902 New(401,Argv, sp - mark + 1, char*);
904 while (++mark <= sp) {
906 *a++ = SvPVx(*mark, na);
911 if (*Argv[0] != '/') /* will execvp use PATH? */
912 TAINT_ENV(); /* testing IFS here is overkill, probably */
913 if (really && *(tmps = SvPV(really, na)))
914 PerlProc_execvp(tmps,Argv);
916 PerlProc_execvp(Argv[0],Argv);
918 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
929 Argv = Null(char **);
937 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP)
946 while (*cmd && isSPACE(*cmd))
949 /* save an extra exec if possible */
952 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
970 PerlProc_execl(cshname,"csh", flags,ncmd,(char*)0);
978 /* see if there are shell metacharacters in it */
980 if (*cmd == '.' && isSPACE(cmd[1]))
983 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
986 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
990 for (s = cmd; *s; s++) {
991 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
992 if (*s == '\n' && !s[1]) {
997 PerlProc_execl(sh_path, "sh", "-c", cmd, (char*)0);
1002 New(402,Argv, (s - cmd) / 2 + 2, char*);
1003 Cmd = savepvn(cmd, s-cmd);
1005 for (s = Cmd; *s;) {
1006 while (*s && isSPACE(*s)) s++;
1009 while (*s && !isSPACE(*s)) s++;
1015 PerlProc_execvp(Argv[0],Argv);
1016 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1021 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
1027 #endif /* OS2 || WIN32 */
1030 apply(I32 type, register SV **mark, register SV **sp)
1035 register I32 tot = 0;
1037 SV **oldmark = mark;
1040 while (++mark <= sp) {
1041 if (SvTAINTED(*mark)) {
1050 TAINT_PROPER("chmod");
1054 while (++mark <= sp) {
1055 if (PerlLIO_chmod(SvPVx(*mark, na),val))
1062 TAINT_PROPER("chown");
1063 if (sp - mark > 2) {
1064 val = SvIVx(*++mark);
1065 val2 = SvIVx(*++mark);
1067 while (++mark <= sp) {
1068 if (chown(SvPVx(*mark, na),val,val2))
1076 TAINT_PROPER("kill");
1079 s = SvPVx(*++mark, na);
1082 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1084 if (!(val = whichsig(s)))
1085 croak("Unrecognized signal name \"%s\"",s);
1090 /* kill() doesn't do process groups (job trees?) under VMS */
1091 if (val < 0) val = -val;
1092 if (val == SIGKILL) {
1093 # include <starlet.h>
1094 /* Use native sys$delprc() to insure that target process is
1095 * deleted; supervisor-mode images don't pay attention to
1096 * CRTL's emulation of Unix-style signals and kill()
1098 while (++mark <= sp) {
1099 I32 proc = SvIVx(*mark);
1100 register unsigned long int __vmssts;
1101 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1105 case SS$_NOSUCHNODE:
1106 SETERRNO(ESRCH,__vmssts);
1109 SETERRNO(EPERM,__vmssts);
1112 SETERRNO(EVMSERR,__vmssts);
1121 while (++mark <= sp) {
1122 I32 proc = SvIVx(*mark);
1124 if (PerlProc_killpg(proc,val)) /* BSD */
1126 if (PerlProc_kill(-proc,val)) /* SYSV */
1132 while (++mark <= sp) {
1133 if (PerlProc_kill(SvIVx(*mark),val))
1140 TAINT_PROPER("unlink");
1142 while (++mark <= sp) {
1143 s = SvPVx(*mark, na);
1144 if (euid || unsafe) {
1148 else { /* don't let root wipe out directories without -U */
1150 if (PerlLIO_lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1152 if (PerlLIO_stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1164 TAINT_PROPER("utime");
1165 if (sp - mark > 2) {
1166 #if defined(I_UTIME) || defined(VMS)
1167 struct utimbuf utbuf;
1175 Zero(&utbuf, sizeof utbuf, char);
1177 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1178 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1180 utbuf.actime = SvIVx(*++mark); /* time accessed */
1181 utbuf.modtime = SvIVx(*++mark); /* time modified */
1184 while (++mark <= sp) {
1185 if (PerlLIO_utime(SvPVx(*mark, na),&utbuf))
1197 /* Do the permissions allow some operation? Assumes statcache already set. */
1198 #ifndef VMS /* VMS' cando is in vms.c */
1200 cando(I32 bit, I32 effective, register struct stat *statbufp)
1203 /* [Comments and code from Len Reed]
1204 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1205 * to write-protected files. The execute permission bit is set
1206 * by the Miscrosoft C library stat() function for the following:
1211 * All files and directories are readable.
1212 * Directories and special files, e.g. "CON", cannot be
1214 * [Comment by Tom Dinger -- a directory can have the write-protect
1215 * bit set in the file system, but DOS permits changes to
1216 * the directory anyway. In addition, all bets are off
1217 * here for networked software, such as Novell and
1221 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1222 * too so it will actually look into the files for magic numbers
1224 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1226 #else /* ! DOSISH */
1227 if ((effective ? euid : uid) == 0) { /* root is special */
1228 if (bit == S_IXUSR) {
1229 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1233 return TRUE; /* root reads and writes anything */
1236 if (statbufp->st_uid == (effective ? euid : uid) ) {
1237 if (statbufp->st_mode & bit)
1238 return TRUE; /* ok as "user" */
1240 else if (ingroup((I32)statbufp->st_gid,effective)) {
1241 if (statbufp->st_mode & bit >> 3)
1242 return TRUE; /* ok as "group" */
1244 else if (statbufp->st_mode & bit >> 6)
1245 return TRUE; /* ok as "other" */
1247 #endif /* ! DOSISH */
1252 ingroup(I32 testgid, I32 effective)
1254 if (testgid == (effective ? egid : gid))
1256 #ifdef HAS_GETGROUPS
1261 Groups_t gary[NGROUPS];
1264 anum = getgroups(NGROUPS,gary);
1266 if (gary[anum] == testgid)
1273 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1276 do_ipcget(I32 optype, SV **mark, SV **sp)
1282 key = (key_t)SvNVx(*++mark);
1283 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1284 flags = SvIVx(*++mark);
1290 return msgget(key, flags);
1294 return semget(key, n, flags);
1298 return shmget(key, n, flags);
1300 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1302 croak("%s not implemented", op_desc[optype]);
1305 return -1; /* should never happen */
1309 do_ipcctl(I32 optype, SV **mark, SV **sp)
1314 I32 id, n, cmd, infosize, getinfo;
1316 #ifdef __linux__ /* XXX Need metaconfig test */
1317 union semun unsemds;
1320 id = SvIVx(*++mark);
1321 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1322 cmd = SvIVx(*++mark);
1325 getinfo = (cmd == IPC_STAT);
1331 if (cmd == IPC_STAT || cmd == IPC_SET)
1332 infosize = sizeof(struct msqid_ds);
1337 if (cmd == IPC_STAT || cmd == IPC_SET)
1338 infosize = sizeof(struct shmid_ds);
1343 if (cmd == IPC_STAT || cmd == IPC_SET)
1344 infosize = sizeof(struct semid_ds);
1345 else if (cmd == GETALL || cmd == SETALL)
1347 struct semid_ds semds;
1348 #ifdef __linux__ /* XXX Need metaconfig test */
1349 /* linux (and Solaris2?) uses :
1350 int semctl (int semid, int semnum, int cmd, union semun arg)
1353 struct semid_ds *buf;
1359 if (semctl(id, 0, IPC_STAT, semun) == -1)
1361 if (semctl(id, 0, IPC_STAT, &semds) == -1)
1364 getinfo = (cmd == GETALL);
1365 infosize = semds.sem_nsems * sizeof(short);
1366 /* "short" is technically wrong but much more portable
1367 than guessing about u_?short(_t)? */
1371 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1373 croak("%s not implemented", op_desc[optype]);
1382 SvPV_force(astr, len);
1383 a = SvGROW(astr, infosize+1);
1387 a = SvPV(astr, len);
1388 if (len != infosize)
1389 croak("Bad arg length for %s, is %lu, should be %ld",
1390 op_desc[optype], (unsigned long)len, (long)infosize);
1396 a = (char *)i; /* ouch */
1403 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1408 #ifdef __linux__ /* XXX Need metaconfig test */
1409 unsemds.buf = (struct semid_ds *)a;
1410 ret = semctl(id, n, cmd, unsemds);
1412 ret = semctl(id, n, cmd, (struct semid_ds *)a);
1418 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1422 if (getinfo && ret >= 0) {
1423 SvCUR_set(astr, infosize);
1424 *SvEND(astr) = '\0';
1431 do_msgsnd(SV **mark, SV **sp)
1437 I32 id, msize, flags;
1440 id = SvIVx(*++mark);
1442 flags = SvIVx(*++mark);
1443 mbuf = SvPV(mstr, len);
1444 if ((msize = len - sizeof(long)) < 0)
1445 croak("Arg too short for msgsnd");
1447 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1449 croak("msgsnd not implemented");
1454 do_msgrcv(SV **mark, SV **sp)
1461 I32 id, msize, flags, ret;
1464 id = SvIVx(*++mark);
1466 msize = SvIVx(*++mark);
1467 mtype = (long)SvIVx(*++mark);
1468 flags = SvIVx(*++mark);
1469 if (SvTHINKFIRST(mstr)) {
1470 if (SvREADONLY(mstr))
1471 croak("Can't msgrcv to readonly var");
1475 SvPV_force(mstr, len);
1476 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1479 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1481 SvCUR_set(mstr, sizeof(long)+ret);
1482 *SvEND(mstr) = '\0';
1486 croak("msgrcv not implemented");
1491 do_semop(SV **mark, SV **sp)
1500 id = SvIVx(*++mark);
1502 opbuf = SvPV(opstr, opsize);
1503 if (opsize < sizeof(struct sembuf)
1504 || (opsize % sizeof(struct sembuf)) != 0) {
1505 SETERRNO(EINVAL,LIB$_INVARG);
1509 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1511 croak("semop not implemented");
1516 do_shmio(I32 optype, SV **mark, SV **sp)
1522 I32 id, mpos, msize;
1524 struct shmid_ds shmds;
1526 id = SvIVx(*++mark);
1528 mpos = SvIVx(*++mark);
1529 msize = SvIVx(*++mark);
1531 if (shmctl(id, IPC_STAT, &shmds) == -1)
1533 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1534 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1537 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1538 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1540 if (optype == OP_SHMREAD) {
1541 SvPV_force(mstr, len);
1542 mbuf = SvGROW(mstr, msize+1);
1544 Copy(shm + mpos, mbuf, msize, char);
1545 SvCUR_set(mstr, msize);
1546 *SvEND(mstr) = '\0';
1552 mbuf = SvPV(mstr, len);
1553 if ((n = len) > msize)
1555 Copy(mbuf, shm + mpos, n, char);
1557 memzero(shm + mpos + n, msize - n);
1561 croak("shm I/O not implemented");
1565 #endif /* SYSV IPC */