3 * Copyright (c) 1991-1994, 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 * But only a short way ahead its floor and the walls on either side were
12 * cloven by a great fissure, out of which the red glare came, now leaping
13 * up, now dying down into darkness; and all the while far below there was
14 * a rumour and a trouble as of great engines throbbing and labouring.
20 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
26 # include <sys/wait.h>
30 # include <sys/resource.h>
33 /* Put this after #includes because fork and vfork prototypes may
40 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
41 # include <sys/socket.h>
45 # include <net/errno.h>
52 #include <sys/select.h>
64 struct passwd *getpwnam _((char *));
65 struct passwd *getpwuid _((Uid_t));
67 struct passwd *getpwent _((void));
74 struct group *getgrnam _((char *));
75 struct group *getgrgid _((Gid_t));
77 struct group *getgrent _((void));
90 #if !defined(HAS_MKDIR) || !defined(HAS_RMDIR)
91 static int dooneliner _((char *cmd, char *filename));
95 # ifdef my_chsize /* Probably #defined to Perl_my_chsize in embed.h */
98 # define my_chsize chsize
103 #else /* no flock() */
105 /* fcntl.h might not have been included, even if it exists, because
106 the current Configure only sets I_FCNTL if it's needed to pick up
107 the *_OK constants. Make sure it has been included before testing
108 the fcntl() locking constants. */
109 # if defined(HAS_FCNTL) && !defined(I_FCNTL)
113 # if defined(HAS_FCNTL) && defined(F_SETLK) && defined (F_SETLKW)
114 # define FLOCK fcntl_emulate_flock
115 # define FCNTL_EMULATE_FLOCK
116 # else /* no flock() or fcntl(F_SETLK,...) */
118 # define FLOCK lockf_emulate_flock
119 # define LOCKF_EMULATE_FLOCK
121 # endif /* no flock() or fcntl(F_SETLK,...) */
124 static int FLOCK _((int, int));
127 * These are the flock() constants. Since this sytems doesn't have
128 * flock(), the values of the constants are probably not available.
142 # endif /* emulating flock() */
144 #endif /* no flock() */
155 fp = my_popen(tmps, "r");
157 if (GIMME == G_SCALAR) {
158 sv_setpv(TARG, ""); /* note that this preserves previous buffer */
159 while (sv_gets(TARG, fp, SvCUR(TARG)) != Nullch)
170 if (sv_gets(sv, fp, 0) == Nullch) {
174 XPUSHs(sv_2mortal(sv));
175 if (SvLEN(sv) - SvCUR(sv) > 20) {
176 SvLEN_set(sv, SvCUR(sv)+1);
177 Renew(SvPVX(sv), SvLEN(sv), char);
182 STATUS_NATIVE_SET(my_pclose(fp));
183 TAINT; /* "I believe that this is not gratuitous!" */
186 STATUS_NATIVE_SET(-1);
187 if (GIMME == G_SCALAR)
199 SAVESPTR(last_in_gv); /* We don't want this to be permanent. */
200 last_in_gv = (GV*)*stack_sp--;
202 SAVESPTR(rs); /* This is not permanent, either. */
203 rs = sv_2mortal(newSVpv("", 1));
210 result = do_readline();
217 last_in_gv = gv_fetchpv(SvPVx(GvSV((GV*)(*stack_sp--)), na), TRUE,SVt_PVIO);
218 return do_readline();
223 last_in_gv = cGVOP->op_gv;
224 return do_readline();
231 if (SP - MARK != 1) {
233 do_join(TARG, &sv_no, MARK, SP);
234 tmps = SvPV(TARG, na);
238 tmps = SvPV(TOPs, na);
240 if (!tmps || !*tmps) {
241 SV *error = GvSV(errgv);
242 (void)SvUPGRADE(error, SVt_PV);
243 if (SvPOK(error) && SvCUR(error))
244 sv_catpv(error, "\t...caught");
245 tmps = SvPV(error, na);
248 tmps = "Warning: something's wrong";
257 if (SP - MARK != 1) {
259 do_join(TARG, &sv_no, MARK, SP);
260 tmps = SvPV(TARG, na);
264 tmps = SvPV(TOPs, na);
266 if (!tmps || !*tmps) {
267 SV *error = GvSV(errgv);
268 (void)SvUPGRADE(error, SVt_PV);
269 if (SvPOK(error) && SvCUR(error))
270 sv_catpv(error, "\t...propagated");
271 tmps = SvPV(error, na);
291 DIE(no_usym, "filehandle");
296 DIE(no_usym, "filehandle");
298 IoFLAGS(GvIOp(gv)) &= ~IOf_UNTAINT;
299 tmps = SvPV(sv, len);
300 if (do_open(gv, tmps, len, FALSE, 0, 0, Nullfp))
301 PUSHi( (I32)forkprocess );
302 else if (forkprocess == 0) /* we are a new child */
319 PUSHs( do_close(gv, TRUE) ? &sv_yes : &sv_no );
339 if (SvTYPE(rgv) != SVt_PVGV || SvTYPE(wgv) != SVt_PVGV)
340 DIE(no_usym, "filehandle");
345 do_close(rgv, FALSE);
347 do_close(wgv, FALSE);
352 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
353 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
354 IoIFP(wstio) = IoOFP(wstio);
358 if (!IoIFP(rstio) || !IoOFP(wstio)) {
359 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
361 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
371 DIE(no_func, "pipe");
384 if (!gv || !(io = GvIO(gv)) || !(fp = IoIFP(io)))
386 PUSHi(PerlIO_fileno(fp));
402 TAINT_PROPER("umask");
405 DIE(no_func, "Unsupported function umask");
423 if (!(io = GvIO(gv)) || !(fp = IoIFP(io)))
428 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
433 if (setmode(PerlIO_fileno(fp), OP_BINARY) != -1)
439 #if defined(USEMYBINMODE)
440 if (my_binmode(fp,IoTYPE(io)) != NULL)
459 SV **mark = stack_base + ++*markstack_ptr; /* reuse in entersub */
460 I32 markoff = mark - stack_base - 1;
464 if (SvTYPE(varsv) == SVt_PVHV)
465 methname = "TIEHASH";
466 else if (SvTYPE(varsv) == SVt_PVAV)
467 methname = "TIEARRAY";
468 else if (SvTYPE(varsv) == SVt_PVGV)
469 methname = "TIEHANDLE";
471 methname = "TIESCALAR";
473 stash = gv_stashsv(mark[1], FALSE);
474 if (!stash || !(gv = gv_fetchmethod(stash, methname)))
475 DIE("Can't locate object method \"%s\" via package \"%s\"",
476 methname, SvPV(mark[1],na));
478 Zero(&myop, 1, BINOP);
479 myop.op_last = (OP *) &myop;
480 myop.op_next = Nullop;
481 myop.op_flags = OPf_KNOW|OPf_STACKED;
486 if (perldb && curstash != debstash)
487 op->op_private |= OPpENTERSUB_DB;
489 XPUSHs((SV*)GvCV(gv));
492 if (op = pp_entersub())
497 if (sv_isobject(sv)) {
498 if (SvTYPE(varsv) == SVt_PVHV || SvTYPE(varsv) == SVt_PVAV) {
499 sv_unmagic(varsv, 'P');
500 sv_magic(varsv, sv, 'P', Nullch, 0);
503 sv_unmagic(varsv, 'q');
504 sv_magic(varsv, sv, 'q', Nullch, 0);
508 SP = stack_base + markoff;
523 if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV)
524 mg = mg_find(sv, 'P') ;
526 mg = mg_find(sv, 'q') ;
528 if (mg && SvREFCNT(SvRV(mg->mg_obj)) > 1)
529 warn("untie attempted while %lu inner references still exist",
530 (unsigned long)SvREFCNT(SvRV(mg->mg_obj)) - 1 ) ;
534 if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV)
549 if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV)
550 mg = mg_find(sv, 'P') ;
552 mg = mg_find(sv, 'q') ;
555 PUSHs(sv_2mortal(newSVsv(mg->mg_obj))) ;
575 sv = sv_mortalcopy(&sv_no);
576 sv_setpv(sv, "AnyDBM_File");
577 stash = gv_stashsv(sv, FALSE);
578 if (!stash || !(gv = gv_fetchmethod(stash, "TIEHASH"))) {
580 perl_require_pv("AnyDBM_File.pm");
582 if (!(gv = gv_fetchmethod(stash, "TIEHASH")))
583 DIE("No dbm on this machine");
586 Zero(&myop, 1, BINOP);
587 myop.op_last = (OP *) &myop;
588 myop.op_next = Nullop;
589 myop.op_flags = OPf_KNOW|OPf_STACKED;
594 if (perldb && curstash != debstash)
595 op->op_private |= OPpENTERSUB_DB;
603 PUSHs(sv_2mortal(newSViv(O_RDWR|O_CREAT)));
605 PUSHs(sv_2mortal(newSViv(O_RDWR)));
607 PUSHs((SV*)GvCV(gv));
610 if (op = pp_entersub())
614 if (!sv_isobject(TOPs)) {
622 PUSHs(sv_2mortal(newSViv(O_RDONLY)));
624 PUSHs((SV*)GvCV(gv));
627 if (op = pp_entersub())
632 if (sv_isobject(TOPs))
633 sv_magic((SV*)hv, TOPs, 'P', Nullch, 0);
640 return pp_untie(ARGS);
654 struct timeval timebuf;
655 struct timeval *tbuf = &timebuf;
658 #if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
663 # if BYTEORDER & 0xf0000
664 # define ORDERBYTE (0x88888888 - BYTEORDER)
666 # define ORDERBYTE (0x4444 - BYTEORDER)
672 for (i = 1; i <= 3; i++) {
680 #if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
681 #if defined(__linux__) || defined(OS2)
682 growsize = sizeof(fd_set);
684 growsize = maxlen; /* little endians can use vecs directly */
693 masksize = NFDBITS / NBBY;
695 masksize = sizeof(long); /* documented int, everyone seems to use long */
697 growsize = maxlen + (masksize - (maxlen % masksize));
698 Zero(&fd_sets[0], 4, char*);
706 timebuf.tv_sec = (long)value;
707 value -= (double)timebuf.tv_sec;
708 timebuf.tv_usec = (long)(value * 1000000.0);
711 tbuf = Null(struct timeval*);
713 for (i = 1; i <= 3; i++) {
720 SvPV_force(sv,na); /* force string conversion */
723 Sv_Grow(sv, growsize);
727 while (++j <= growsize) {
731 #if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
733 New(403, fd_sets[i], growsize, char);
734 for (offset = 0; offset < growsize; offset += masksize) {
735 for (j = 0, k=ORDERBYTE; j < masksize; j++, (k >>= 4))
736 fd_sets[i][j+offset] = s[(k % masksize) + offset];
739 fd_sets[i] = SvPVX(sv);
745 (Select_fd_set_t) fd_sets[1],
746 (Select_fd_set_t) fd_sets[2],
747 (Select_fd_set_t) fd_sets[3],
749 for (i = 1; i <= 3; i++) {
752 #if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
754 for (offset = 0; offset < growsize; offset += masksize) {
755 for (j = 0, k=ORDERBYTE; j < masksize; j++, (k >>= 4))
756 s[(k % masksize) + offset] = fd_sets[i][j+offset];
758 Safefree(fd_sets[i]);
765 if (GIMME == G_ARRAY && tbuf) {
766 value = (double)(timebuf.tv_sec) +
767 (double)(timebuf.tv_usec) / 1000000.0;
768 PUSHs(sv = sv_mortalcopy(&sv_no));
773 DIE("select not implemented");
782 (void)SvREFCNT_inc(gv);
784 SvREFCNT_dec(defoutgv);
794 newdefout = (op->op_private > 0) ? ((GV *) POPs) : NULL;
796 egv = GvEGV(defoutgv);
803 GV **gvp = (GV**)hv_fetch(hv, GvNAME(egv), GvNAMELEN(egv), FALSE);
804 if (gvp && *gvp == egv) {
805 gv_efullname3(TARG, defoutgv, Nullch);
809 XPUSHs(sv_2mortal(newRV((SV*)egv)));
814 if (!GvIO(newdefout))
816 setdefout(newdefout);
833 if (!gv || do_eof(gv)) /* make sure we have fp with something */
837 *SvPVX(TARG) = PerlIO_getc(IoIFP(GvIOp(gv))); /* should never be EOF */
844 return pp_sysread(ARGS);
853 register CONTEXT *cx;
855 AV* padlist = CvPADLIST(cv);
856 SV** svp = AvARRAY(padlist);
862 PUSHBLOCK(cx, CXt_SUB, stack_sp);
865 curpad = AvARRAY((AV*)svp[1]);
867 setdefout(gv); /* locally select filehandle so $% et al work */
899 SV *tmpsv = sv_newmortal();
900 gv_efullname3(tmpsv, fgv, Nullch);
901 DIE("Undefined format \"%s\" called",SvPVX(tmpsv));
903 DIE("Not a format reference");
906 cv = (CV*)sv_2mortal((SV*)cv_clone(cv));
908 IoFLAGS(io) &= ~IOf_DIDTOP;
909 return doform(cv,gv,op->op_next);
915 GV *gv = cxstack[cxstack_ix].blk_sub.gv;
916 register IO *io = GvIOp(gv);
917 PerlIO *ofp = IoOFP(io);
921 register CONTEXT *cx;
923 DEBUG_f(PerlIO_printf(Perl_debug_log, "left=%ld, todo=%ld\n",
924 (long)IoLINES_LEFT(io), (long)FmLINES(formtarget)));
925 if (IoLINES_LEFT(io) < FmLINES(formtarget) &&
926 formtarget != toptarget)
934 if (!IoTOP_NAME(io)) {
936 IoFMT_NAME(io) = savepv(GvNAME(gv));
937 sprintf(tmpbuf, "%s_TOP", IoFMT_NAME(io));
938 topgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVFM);
939 if ((topgv && GvFORM(topgv)) ||
940 !gv_fetchpv("top",FALSE,SVt_PVFM))
941 IoTOP_NAME(io) = savepv(tmpbuf);
943 IoTOP_NAME(io) = savepv("top");
945 topgv = gv_fetchpv(IoTOP_NAME(io),FALSE, SVt_PVFM);
946 if (!topgv || !GvFORM(topgv)) {
947 IoLINES_LEFT(io) = 100000000;
950 IoTOP_GV(io) = topgv;
952 if (IoFLAGS(io) & IOf_DIDTOP) { /* Oh dear. It still doesn't fit. */
953 I32 lines = IoLINES_LEFT(io);
954 char *s = SvPVX(formtarget);
955 if (lines <= 0) /* Yow, header didn't even fit!!! */
957 while (lines-- > 0) {
964 PerlIO_write(ofp, SvPVX(formtarget), s - SvPVX(formtarget));
965 sv_chop(formtarget, s);
966 FmLINES(formtarget) -= IoLINES_LEFT(io);
969 if (IoLINES_LEFT(io) >= 0 && IoPAGE(io) > 0)
970 PerlIO_write(ofp, SvPVX(formfeed), SvCUR(formfeed));
971 IoLINES_LEFT(io) = IoPAGE_LEN(io);
973 formtarget = toptarget;
974 IoFLAGS(io) |= IOf_DIDTOP;
977 DIE("bad top format reference");
980 SV *tmpsv = sv_newmortal();
981 gv_efullname3(tmpsv, fgv, Nullch);
982 DIE("Undefined top format \"%s\" called",SvPVX(tmpsv));
985 cv = (CV*)sv_2mortal((SV*)cv_clone(cv));
986 return doform(cv,gv,op);
998 warn("Filehandle only opened for input");
1000 warn("Write on closed filehandle");
1005 if ((IoLINES_LEFT(io) -= FmLINES(formtarget)) < 0) {
1007 warn("page overflow");
1009 if (!PerlIO_write(ofp, SvPVX(formtarget), SvCUR(formtarget)) ||
1013 FmLINES(formtarget) = 0;
1014 SvCUR_set(formtarget, 0);
1015 *SvEND(formtarget) = '\0';
1016 if (IoFLAGS(io) & IOf_FLUSH)
1017 (void)PerlIO_flush(fp);
1021 formtarget = bodytarget;
1023 return pop_return();
1028 dSP; dMARK; dORIGMARK;
1032 SV *sv = NEWSV(0,0);
1034 if (op->op_flags & OPf_STACKED)
1038 if (!(io = GvIO(gv))) {
1040 gv_fullname3(sv, gv, Nullch);
1041 warn("Filehandle %s never opened", SvPV(sv,na));
1043 SETERRNO(EBADF,RMS$_IFI);
1046 else if (!(fp = IoOFP(io))) {
1048 gv_fullname3(sv, gv, Nullch);
1050 warn("Filehandle %s opened only for input", SvPV(sv,na));
1052 warn("printf on closed filehandle %s", SvPV(sv,na));
1054 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
1058 #ifdef USE_LOCALE_NUMERIC
1059 if (op->op_private & OPpLOCALE)
1060 SET_NUMERIC_LOCAL();
1062 SET_NUMERIC_STANDARD();
1064 do_sprintf(sv, SP - MARK, MARK + 1);
1065 if (!do_print(sv, fp))
1068 if (IoFLAGS(io) & IOf_FLUSH)
1069 if (PerlIO_flush(fp) == EOF)
1101 tmps = SvPV(sv, len);
1102 if (do_open(gv, tmps, len, TRUE, mode, perm, Nullfp)) {
1103 IoLINES(GvIOp(gv)) = 0;
1114 dSP; dMARK; dORIGMARK; dTARGET;
1129 sv_setpvn(bufsv, "", 0);
1130 buffer = SvPV_force(bufsv, blen);
1131 length = SvIVx(*++MARK);
1133 DIE("Negative length");
1136 offset = SvIVx(*++MARK);
1140 if (!io || !IoIFP(io))
1143 if (op->op_type == OP_RECV) {
1144 bufsize = sizeof buf;
1145 buffer = SvGROW(bufsv, length+1);
1146 /* 'offset' means 'flags' here */
1147 length = recvfrom(PerlIO_fileno(IoIFP(io)), buffer, length, offset,
1148 (struct sockaddr *)buf, &bufsize);
1151 SvCUR_set(bufsv, length);
1152 *SvEND(bufsv) = '\0';
1153 (void)SvPOK_only(bufsv);
1155 /* This should not be marked tainted if the fp is marked clean */
1156 if (!(IoFLAGS(io) & IOf_UNTAINT))
1157 SvTAINTED_on(bufsv);
1159 sv_setpvn(TARG, buf, bufsize);
1164 if (op->op_type == OP_RECV)
1165 DIE(no_sock_func, "recv");
1169 DIE("Offset outside string");
1172 bufsize = SvCUR(bufsv);
1173 buffer = SvGROW(bufsv, length+offset+1);
1174 if (offset > bufsize) { /* Zero any newly allocated space */
1175 Zero(buffer+bufsize, offset-bufsize, char);
1177 if (op->op_type == OP_SYSREAD) {
1178 length = read(PerlIO_fileno(IoIFP(io)), buffer+offset, length);
1181 #ifdef HAS_SOCKET__bad_code_maybe
1182 if (IoTYPE(io) == 's') {
1183 bufsize = sizeof buf;
1184 length = recvfrom(PerlIO_fileno(IoIFP(io)), buffer+offset, length, 0,
1185 (struct sockaddr *)buf, &bufsize);
1189 length = PerlIO_read(IoIFP(io), buffer+offset, length);
1192 SvCUR_set(bufsv, length+offset);
1193 *SvEND(bufsv) = '\0';
1194 (void)SvPOK_only(bufsv);
1196 /* This should not be marked tainted if the fp is marked clean */
1197 if (!(IoFLAGS(io) & IOf_UNTAINT))
1198 SvTAINTED_on(bufsv);
1210 return pp_send(ARGS);
1215 dSP; dMARK; dORIGMARK; dTARGET;
1228 buffer = SvPV(bufsv, blen);
1229 length = SvIVx(*++MARK);
1231 DIE("Negative length");
1234 if (!io || !IoIFP(io)) {
1237 if (op->op_type == OP_SYSWRITE)
1238 warn("Syswrite on closed filehandle");
1240 warn("Send on closed socket");
1243 else if (op->op_type == OP_SYSWRITE) {
1245 offset = SvIVx(*++MARK);
1248 DIE("Offset outside string");
1250 } else if (offset >= blen)
1251 DIE("Offset outside string");
1254 if (length > blen - offset)
1255 length = blen - offset;
1256 length = write(PerlIO_fileno(IoIFP(io)), buffer+offset, length);
1259 else if (SP > MARK) {
1262 sockbuf = SvPVx(*++MARK, mlen);
1263 length = sendto(PerlIO_fileno(IoIFP(io)), buffer, blen, length,
1264 (struct sockaddr *)sockbuf, mlen);
1267 length = send(PerlIO_fileno(IoIFP(io)), buffer, blen, length);
1270 DIE(no_sock_func, "send");
1285 return pp_sysread(ARGS);
1296 gv = last_in_gv = (GV*)POPs;
1297 PUSHs(!gv || do_eof(gv) ? &sv_yes : &sv_no);
1309 gv = last_in_gv = (GV*)POPs;
1310 PUSHi( do_tell(gv) );
1321 gv = last_in_gv = (GV*)POPs;
1322 PUSHs( do_seek(gv, offset, whence) ? &sv_yes : &sv_no );
1329 Off_t len = (Off_t)POPn;
1334 #if defined(HAS_TRUNCATE) || defined(HAS_CHSIZE) || defined(F_FREESP)
1335 if (op->op_flags & OPf_SPECIAL) {
1336 tmpgv = gv_fetchpv(POPp,FALSE, SVt_PVIO);
1338 if (!GvIO(tmpgv) || !IoIFP(GvIOp(tmpgv)) ||
1340 ftruncate(PerlIO_fileno(IoIFP(GvIOn(tmpgv))), len) < 0)
1342 my_chsize(PerlIO_fileno(IoIFP(GvIOn(tmpgv))), len) < 0)
1348 if (SvTYPE(sv) == SVt_PVGV) {
1349 tmpgv = (GV*)sv; /* *main::FRED for example */
1352 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1353 tmpgv = (GV*) SvRV(sv); /* \*main::FRED for example */
1357 if (truncate (SvPV (sv, na), len) < 0)
1363 if ((tmpfd = open(SvPV (sv, na), O_RDWR)) < 0)
1366 if (my_chsize(tmpfd, len) < 0)
1377 SETERRNO(EBADF,RMS$_IFI);
1380 DIE("truncate not implemented");
1386 return pp_ioctl(ARGS);
1393 unsigned int func = U_I(POPn);
1394 int optype = op->op_type;
1400 if (!io || !argsv || !IoIFP(io)) {
1401 SETERRNO(EBADF,RMS$_IFI); /* well, sort of... */
1405 if (SvPOK(argsv) || !SvNIOK(argsv)) {
1407 s = SvPV_force(argsv, len);
1408 retval = IOCPARM_LEN(func);
1410 s = Sv_Grow(argsv, retval+1);
1411 SvCUR_set(argsv, retval);
1414 s[SvCUR(argsv)] = 17; /* a little sanity check here */
1417 retval = SvIV(argsv);
1419 s = (char*)(long)retval; /* ouch */
1421 s = (char*)retval; /* ouch */
1425 TAINT_PROPER(optype == OP_IOCTL ? "ioctl" : "fcntl");
1427 if (optype == OP_IOCTL)
1429 retval = ioctl(PerlIO_fileno(IoIFP(io)), func, s);
1431 DIE("ioctl is not implemented");
1435 #if defined(OS2) && defined(__EMX__)
1436 retval = fcntl(PerlIO_fileno(IoIFP(io)), func, (int)s);
1438 retval = fcntl(PerlIO_fileno(IoIFP(io)), func, s);
1441 DIE("fcntl is not implemented");
1445 if (s[SvCUR(argsv)] != 17)
1446 DIE("Possible memory corruption: %s overflowed 3rd argument",
1448 s[SvCUR(argsv)] = 0; /* put our null back */
1449 SvSETMAGIC(argsv); /* Assume it has changed */
1458 PUSHp("0 but true", 10);
1478 fp = IoIFP(GvIOp(gv));
1482 value = (I32)(FLOCK(PerlIO_fileno(fp), argtype) >= 0);
1489 DIE(no_func, "flock()");
1501 int protocol = POPi;
1509 SETERRNO(EBADF,LIB$_INVARG);
1515 do_close(gv, FALSE);
1517 TAINT_PROPER("socket");
1518 fd = socket(domain, type, protocol);
1521 IoIFP(io) = PerlIO_fdopen(fd, "r"); /* stdio gets confused about sockets */
1522 IoOFP(io) = PerlIO_fdopen(fd, "w");
1524 if (!IoIFP(io) || !IoOFP(io)) {
1525 if (IoIFP(io)) PerlIO_close(IoIFP(io));
1526 if (IoOFP(io)) PerlIO_close(IoOFP(io));
1527 if (!IoIFP(io) && !IoOFP(io)) close(fd);
1533 DIE(no_sock_func, "socket");
1540 #ifdef HAS_SOCKETPAIR
1545 int protocol = POPi;
1558 do_close(gv1, FALSE);
1560 do_close(gv2, FALSE);
1562 TAINT_PROPER("socketpair");
1563 if (socketpair(domain, type, protocol, fd) < 0)
1565 IoIFP(io1) = PerlIO_fdopen(fd[0], "r");
1566 IoOFP(io1) = PerlIO_fdopen(fd[0], "w");
1568 IoIFP(io2) = PerlIO_fdopen(fd[1], "r");
1569 IoOFP(io2) = PerlIO_fdopen(fd[1], "w");
1571 if (!IoIFP(io1) || !IoOFP(io1) || !IoIFP(io2) || !IoOFP(io2)) {
1572 if (IoIFP(io1)) PerlIO_close(IoIFP(io1));
1573 if (IoOFP(io1)) PerlIO_close(IoOFP(io1));
1574 if (!IoIFP(io1) && !IoOFP(io1)) close(fd[0]);
1575 if (IoIFP(io2)) PerlIO_close(IoIFP(io2));
1576 if (IoOFP(io2)) PerlIO_close(IoOFP(io2));
1577 if (!IoIFP(io2) && !IoOFP(io2)) close(fd[1]);
1583 DIE(no_sock_func, "socketpair");
1594 register IO *io = GvIOn(gv);
1597 if (!io || !IoIFP(io))
1600 addr = SvPV(addrsv, len);
1601 TAINT_PROPER("bind");
1602 if (bind(PerlIO_fileno(IoIFP(io)), (struct sockaddr *)addr, len) >= 0)
1609 warn("bind() on closed fd");
1610 SETERRNO(EBADF,SS$_IVCHAN);
1613 DIE(no_sock_func, "bind");
1624 register IO *io = GvIOn(gv);
1627 if (!io || !IoIFP(io))
1630 addr = SvPV(addrsv, len);
1631 TAINT_PROPER("connect");
1632 if (connect(PerlIO_fileno(IoIFP(io)), (struct sockaddr *)addr, len) >= 0)
1639 warn("connect() on closed fd");
1640 SETERRNO(EBADF,SS$_IVCHAN);
1643 DIE(no_sock_func, "connect");
1653 register IO *io = GvIOn(gv);
1655 if (!io || !IoIFP(io))
1658 if (listen(PerlIO_fileno(IoIFP(io)), backlog) >= 0)
1665 warn("listen() on closed fd");
1666 SETERRNO(EBADF,SS$_IVCHAN);
1669 DIE(no_sock_func, "listen");
1681 struct sockaddr saddr; /* use a struct to avoid alignment problems */
1682 int len = sizeof saddr;
1694 if (!gstio || !IoIFP(gstio))
1699 do_close(ngv, FALSE);
1701 fd = accept(PerlIO_fileno(IoIFP(gstio)), (struct sockaddr *)&saddr, &len);
1704 IoIFP(nstio) = PerlIO_fdopen(fd, "r");
1705 IoOFP(nstio) = PerlIO_fdopen(fd, "w");
1706 IoTYPE(nstio) = 's';
1707 if (!IoIFP(nstio) || !IoOFP(nstio)) {
1708 if (IoIFP(nstio)) PerlIO_close(IoIFP(nstio));
1709 if (IoOFP(nstio)) PerlIO_close(IoOFP(nstio));
1710 if (!IoIFP(nstio) && !IoOFP(nstio)) close(fd);
1714 PUSHp((char *)&saddr, len);
1719 warn("accept() on closed fd");
1720 SETERRNO(EBADF,SS$_IVCHAN);
1726 DIE(no_sock_func, "accept");
1736 register IO *io = GvIOn(gv);
1738 if (!io || !IoIFP(io))
1741 PUSHi( shutdown(PerlIO_fileno(IoIFP(io)), how) >= 0 );
1746 warn("shutdown() on closed fd");
1747 SETERRNO(EBADF,SS$_IVCHAN);
1750 DIE(no_sock_func, "shutdown");
1757 return pp_ssockopt(ARGS);
1759 DIE(no_sock_func, "getsockopt");
1767 int optype = op->op_type;
1770 unsigned int optname;
1776 if (optype == OP_GSOCKOPT)
1777 sv = sv_2mortal(NEWSV(22, 257));
1780 optname = (unsigned int) POPi;
1781 lvl = (unsigned int) POPi;
1785 if (!io || !IoIFP(io))
1788 fd = PerlIO_fileno(IoIFP(io));
1792 (void)SvPOK_only(sv);
1796 if (getsockopt(fd, lvl, optname, SvPVX(sv), &aint) < 0)
1806 buf = SvPV(sv, len);
1807 else if (SvOK(sv)) {
1808 aint = (int)SvIV(sv);
1812 if (setsockopt(fd, lvl, optname, buf, (int)len) < 0)
1822 warn("[gs]etsockopt() on closed fd");
1823 SETERRNO(EBADF,SS$_IVCHAN);
1828 DIE(no_sock_func, "setsockopt");
1835 return pp_getpeername(ARGS);
1837 DIE(no_sock_func, "getsockname");
1845 int optype = op->op_type;
1849 register IO *io = GvIOn(gv);
1852 if (!io || !IoIFP(io))
1855 sv = sv_2mortal(NEWSV(22, 257));
1856 (void)SvPOK_only(sv);
1860 fd = PerlIO_fileno(IoIFP(io));
1862 case OP_GETSOCKNAME:
1863 if (getsockname(fd, (struct sockaddr *)SvPVX(sv), &aint) < 0)
1866 case OP_GETPEERNAME:
1867 if (getpeername(fd, (struct sockaddr *)SvPVX(sv), &aint) < 0)
1871 #ifdef BOGUS_GETNAME_RETURN
1872 /* Interactive Unix, getpeername() and getsockname()
1873 does not return valid namelen */
1874 if (aint == BOGUS_GETNAME_RETURN)
1875 aint = sizeof(struct sockaddr);
1884 warn("get{sock, peer}name() on closed fd");
1885 SETERRNO(EBADF,SS$_IVCHAN);
1890 DIE(no_sock_func, "getpeername");
1898 return pp_stat(ARGS);
1907 if (op->op_flags & OPf_REF) {
1908 tmpgv = cGVOP->op_gv;
1910 if (tmpgv != defgv) {
1911 laststype = OP_STAT;
1913 sv_setpv(statname, "");
1914 laststatval = (GvIO(tmpgv) && IoIFP(GvIOp(tmpgv))
1915 ? Fstat(PerlIO_fileno(IoIFP(GvIOn(tmpgv))), &statcache) : -1);
1917 if (laststatval < 0)
1922 if (SvTYPE(sv) == SVt_PVGV) {
1926 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1927 tmpgv = (GV*)SvRV(sv);
1930 sv_setpv(statname, SvPV(sv,na));
1933 laststype = op->op_type;
1934 if (op->op_type == OP_LSTAT)
1935 laststatval = lstat(SvPV(statname, na), &statcache);
1938 laststatval = Stat(SvPV(statname, na), &statcache);
1939 if (laststatval < 0) {
1940 if (dowarn && strchr(SvPV(statname, na), '\n'))
1941 warn(warn_nl, "stat");
1946 if (GIMME != G_ARRAY) {
1957 PUSHs(sv_2mortal(newSViv((I32)statcache.st_dev)));
1958 PUSHs(sv_2mortal(newSViv((I32)statcache.st_ino)));
1959 PUSHs(sv_2mortal(newSViv((I32)statcache.st_mode)));
1960 PUSHs(sv_2mortal(newSViv((I32)statcache.st_nlink)));
1961 PUSHs(sv_2mortal(newSViv((I32)statcache.st_uid)));
1962 PUSHs(sv_2mortal(newSViv((I32)statcache.st_gid)));
1963 #ifdef USE_STAT_RDEV
1964 PUSHs(sv_2mortal(newSViv((I32)statcache.st_rdev)));
1966 PUSHs(sv_2mortal(newSVpv("", 0)));
1968 PUSHs(sv_2mortal(newSViv((I32)statcache.st_size)));
1970 PUSHs(sv_2mortal(newSVnv((U32)statcache.st_atime)));
1971 PUSHs(sv_2mortal(newSVnv((U32)statcache.st_mtime)));
1972 PUSHs(sv_2mortal(newSVnv((U32)statcache.st_ctime)));
1974 PUSHs(sv_2mortal(newSViv((I32)statcache.st_atime)));
1975 PUSHs(sv_2mortal(newSViv((I32)statcache.st_mtime)));
1976 PUSHs(sv_2mortal(newSViv((I32)statcache.st_ctime)));
1978 #ifdef USE_STAT_BLOCKS
1979 PUSHs(sv_2mortal(newSViv((I32)statcache.st_blksize)));
1980 PUSHs(sv_2mortal(newSViv((I32)statcache.st_blocks)));
1982 PUSHs(sv_2mortal(newSVpv("", 0)));
1983 PUSHs(sv_2mortal(newSVpv("", 0)));
1991 I32 result = my_stat(ARGS);
1995 if (cando(S_IRUSR, 0, &statcache))
2002 I32 result = my_stat(ARGS);
2006 if (cando(S_IWUSR, 0, &statcache))
2013 I32 result = my_stat(ARGS);
2017 if (cando(S_IXUSR, 0, &statcache))
2024 I32 result = my_stat(ARGS);
2028 if (cando(S_IRUSR, 1, &statcache))
2035 I32 result = my_stat(ARGS);
2039 if (cando(S_IWUSR, 1, &statcache))
2046 I32 result = my_stat(ARGS);
2050 if (cando(S_IXUSR, 1, &statcache))
2057 I32 result = my_stat(ARGS);
2066 return pp_ftrowned(ARGS);
2071 I32 result = my_stat(ARGS);
2075 if (statcache.st_uid == (op->op_type == OP_FTEOWNED ? euid : uid) )
2082 I32 result = my_stat(ARGS);
2086 if (!statcache.st_size)
2093 I32 result = my_stat(ARGS);
2097 PUSHi(statcache.st_size);
2103 I32 result = my_stat(ARGS);
2107 PUSHn( ((I32)basetime - (I32)statcache.st_mtime) / 86400.0 );
2113 I32 result = my_stat(ARGS);
2117 PUSHn( ((I32)basetime - (I32)statcache.st_atime) / 86400.0 );
2123 I32 result = my_stat(ARGS);
2127 PUSHn( ((I32)basetime - (I32)statcache.st_ctime) / 86400.0 );
2133 I32 result = my_stat(ARGS);
2137 if (S_ISSOCK(statcache.st_mode))
2144 I32 result = my_stat(ARGS);
2148 if (S_ISCHR(statcache.st_mode))
2155 I32 result = my_stat(ARGS);
2159 if (S_ISBLK(statcache.st_mode))
2166 I32 result = my_stat(ARGS);
2170 if (S_ISREG(statcache.st_mode))
2177 I32 result = my_stat(ARGS);
2181 if (S_ISDIR(statcache.st_mode))
2188 I32 result = my_stat(ARGS);
2192 if (S_ISFIFO(statcache.st_mode))
2199 I32 result = my_lstat(ARGS);
2203 if (S_ISLNK(statcache.st_mode))
2212 I32 result = my_stat(ARGS);
2216 if (statcache.st_mode & S_ISUID)
2226 I32 result = my_stat(ARGS);
2230 if (statcache.st_mode & S_ISGID)
2240 I32 result = my_stat(ARGS);
2244 if (statcache.st_mode & S_ISVTX)
2256 if (op->op_flags & OPf_REF) {
2261 gv = gv_fetchpv(tmps = POPp, FALSE, SVt_PVIO);
2262 if (GvIO(gv) && IoIFP(GvIOp(gv)))
2263 fd = PerlIO_fileno(IoIFP(GvIOp(gv)));
2264 else if (isDIGIT(*tmps))
2273 #if defined(atarist) /* this will work with atariST. Configure will
2274 make guesses for other systems. */
2275 # define FILE_base(f) ((f)->_base)
2276 # define FILE_ptr(f) ((f)->_ptr)
2277 # define FILE_cnt(f) ((f)->_cnt)
2278 # define FILE_bufsiz(f) ((f)->_cnt + ((f)->_ptr - (f)->_base))
2288 register STDCHAR *s;
2293 if (op->op_flags & OPf_REF)
2295 else if (isGV(TOPs))
2297 else if (SvROK(TOPs) && isGV(SvRV(TOPs)))
2298 gv = (GV*)SvRV(POPs);
2309 goto really_filename;
2315 sv_setpv(statname, "");
2318 if (io && IoIFP(io)) {
2319 if (! PerlIO_has_base(IoIFP(io)))
2320 DIE("-T and -B not implemented on filehandles");
2321 laststatval = Fstat(PerlIO_fileno(IoIFP(io)), &statcache);
2322 if (laststatval < 0)
2324 if (S_ISDIR(statcache.st_mode)) /* handle NFS glitch */
2325 if (op->op_type == OP_FTTEXT)
2329 if (PerlIO_get_cnt(IoIFP(io)) <= 0) {
2330 i = PerlIO_getc(IoIFP(io));
2332 (void)PerlIO_ungetc(IoIFP(io),i);
2334 if (PerlIO_get_cnt(IoIFP(io)) <= 0) /* null file is anything */
2336 len = PerlIO_get_bufsiz(IoIFP(io));
2337 s = (STDCHAR *) PerlIO_get_base(IoIFP(io));
2338 /* sfio can have large buffers - limit to 512 */
2344 warn("Test on unopened file <%s>",
2345 GvENAME(cGVOP->op_gv));
2346 SETERRNO(EBADF,RMS$_IFI);
2355 sv_setpv(statname, SvPV(sv, na));
2357 i = open(SvPV(sv, na), O_RDONLY, 0);
2359 i = open(SvPV(sv, na), 0);
2362 if (dowarn && strchr(SvPV(sv, na), '\n'))
2363 warn(warn_nl, "open");
2366 laststatval = Fstat(i, &statcache);
2367 if (laststatval < 0)
2369 len = read(i, tbuf, 512);
2372 if (S_ISDIR(statcache.st_mode) && op->op_type == OP_FTTEXT)
2373 RETPUSHNO; /* special case NFS directories */
2374 RETPUSHYES; /* null file is anything */
2379 /* now scan s to look for textiness */
2380 /* XXX ASCII dependent code */
2382 for (i = 0; i < len; i++, s++) {
2383 if (!*s) { /* null never allowed in text */
2390 *s != '\n' && *s != '\r' && *s != '\b' &&
2391 *s != '\t' && *s != '\f' && *s != 27)
2395 if ((odd * 3 > len) == (op->op_type == OP_FTTEXT)) /* allow 1/3 odd */
2403 return pp_fttext(ARGS);
2418 if (!tmps || !*tmps) {
2419 svp = hv_fetch(GvHVn(envgv), "HOME", 4, FALSE);
2421 tmps = SvPV(*svp, na);
2423 if (!tmps || !*tmps) {
2424 svp = hv_fetch(GvHVn(envgv), "LOGDIR", 6, FALSE);
2426 tmps = SvPV(*svp, na);
2428 TAINT_PROPER("chdir");
2429 PUSHi( chdir(tmps) >= 0 );
2431 /* Clear the DEFAULT element of ENV so we'll get the new value
2433 hv_delete(GvHVn(envgv),"DEFAULT",7,G_DISCARD);
2440 dSP; dMARK; dTARGET;
2443 value = (I32)apply(op->op_type, MARK, SP);
2448 DIE(no_func, "Unsupported function chown");
2458 TAINT_PROPER("chroot");
2459 PUSHi( chroot(tmps) >= 0 );
2462 DIE(no_func, "chroot");
2468 dSP; dMARK; dTARGET;
2470 value = (I32)apply(op->op_type, MARK, SP);
2478 dSP; dMARK; dTARGET;
2480 value = (I32)apply(op->op_type, MARK, SP);
2488 dSP; dMARK; dTARGET;
2490 value = (I32)apply(op->op_type, MARK, SP);
2502 char *tmps = SvPV(TOPs, na);
2503 TAINT_PROPER("rename");
2505 anum = rename(tmps, tmps2);
2507 if (!(anum = Stat(tmps, &statbuf))) {
2508 if (same_dirent(tmps2, tmps)) /* can always rename to same name */
2511 if (euid || Stat(tmps2, &statbuf) < 0 || !S_ISDIR(statbuf.st_mode))
2512 (void)UNLINK(tmps2);
2513 if (!(anum = link(tmps, tmps2)))
2514 anum = UNLINK(tmps);
2527 char *tmps = SvPV(TOPs, na);
2528 TAINT_PROPER("link");
2529 SETi( link(tmps, tmps2) >= 0 );
2531 DIE(no_func, "Unsupported function link");
2541 char *tmps = SvPV(TOPs, na);
2542 TAINT_PROPER("symlink");
2543 SETi( symlink(tmps, tmps2) >= 0 );
2546 DIE(no_func, "symlink");
2557 len = readlink(tmps, buf, sizeof buf);
2565 RETSETUNDEF; /* just pretend it's a normal file */
2569 #if !defined(HAS_MKDIR) || !defined(HAS_RMDIR)
2571 dooneliner(cmd, filename)
2577 *save_filename = filename;
2583 for (s = mybuf+strlen(mybuf); *filename; ) {
2588 myfp = my_popen(mybuf, "r");
2591 /* Need to save/restore 'rs' ?? */
2592 s = sv_gets(tmpsv, myfp, 0);
2593 (void)my_pclose(myfp);
2595 for (errno = 1; errno < sys_nerr; errno++) {
2596 #ifdef HAS_SYS_ERRLIST
2597 if (instr(mybuf, sys_errlist[errno])) /* you don't see this */
2600 char *errmsg; /* especially if it isn't there */
2603 (errmsg = strerror(errno)) ? errmsg : "NoErRoR"))
2609 #define EACCES EPERM
2611 if (instr(mybuf, "cannot make"))
2612 SETERRNO(EEXIST,RMS$_FEX);
2613 else if (instr(mybuf, "existing file"))
2614 SETERRNO(EEXIST,RMS$_FEX);
2615 else if (instr(mybuf, "ile exists"))
2616 SETERRNO(EEXIST,RMS$_FEX);
2617 else if (instr(mybuf, "non-exist"))
2618 SETERRNO(ENOENT,RMS$_FNF);
2619 else if (instr(mybuf, "does not exist"))
2620 SETERRNO(ENOENT,RMS$_FNF);
2621 else if (instr(mybuf, "not empty"))
2622 SETERRNO(EBUSY,SS$_DEVOFFLINE);
2623 else if (instr(mybuf, "cannot access"))
2624 SETERRNO(EACCES,RMS$_PRV);
2626 SETERRNO(EPERM,RMS$_PRV);
2629 else { /* some mkdirs return no failure indication */
2630 anum = (Stat(save_filename, &statbuf) >= 0);
2631 if (op->op_type == OP_RMDIR)
2636 SETERRNO(EACCES,RMS$_PRV); /* a guess */
2652 char *tmps = SvPV(TOPs, na);
2654 TAINT_PROPER("mkdir");
2656 SETi( mkdir(tmps, mode) >= 0 );
2658 SETi( dooneliner("mkdir", tmps) );
2659 oldumask = umask(0);
2661 chmod(tmps, (mode & ~oldumask) & 0777);
2672 TAINT_PROPER("rmdir");
2674 XPUSHi( rmdir(tmps) >= 0 );
2676 XPUSHi( dooneliner("rmdir", tmps) );
2681 /* Directory calls. */
2686 #if defined(Direntry_t) && defined(HAS_READDIR)
2687 char *dirname = POPp;
2689 register IO *io = GvIOn(gv);
2695 closedir(IoDIRP(io));
2696 if (!(IoDIRP(io) = opendir(dirname)))
2702 SETERRNO(EBADF,RMS$_DIR);
2705 DIE(no_dir_func, "opendir");
2712 #if defined(Direntry_t) && defined(HAS_READDIR)
2714 Direntry_t *readdir _((DIR *));
2716 register Direntry_t *dp;
2718 register IO *io = GvIOn(gv);
2720 if (!io || !IoDIRP(io))
2723 if (GIMME == G_ARRAY) {
2725 while (dp = (Direntry_t *)readdir(IoDIRP(io))) {
2727 XPUSHs(sv_2mortal(newSVpv(dp->d_name, dp->d_namlen)));
2729 XPUSHs(sv_2mortal(newSVpv(dp->d_name, 0)));
2734 if (!(dp = (Direntry_t *)readdir(IoDIRP(io))))
2737 XPUSHs(sv_2mortal(newSVpv(dp->d_name, dp->d_namlen)));
2739 XPUSHs(sv_2mortal(newSVpv(dp->d_name, 0)));
2746 SETERRNO(EBADF,RMS$_ISI);
2747 if (GIMME == G_ARRAY)
2752 DIE(no_dir_func, "readdir");
2759 #if defined(HAS_TELLDIR) || defined(telldir)
2760 #if !defined(telldir) && !defined(HAS_TELLDIR_PROTOTYPE)
2761 long telldir _((DIR *));
2764 register IO *io = GvIOn(gv);
2766 if (!io || !IoDIRP(io))
2769 PUSHi( telldir(IoDIRP(io)) );
2773 SETERRNO(EBADF,RMS$_ISI);
2776 DIE(no_dir_func, "telldir");
2783 #if defined(HAS_SEEKDIR) || defined(seekdir)
2786 register IO *io = GvIOn(gv);
2788 if (!io || !IoDIRP(io))
2791 (void)seekdir(IoDIRP(io), along);
2796 SETERRNO(EBADF,RMS$_ISI);
2799 DIE(no_dir_func, "seekdir");
2806 #if defined(HAS_REWINDDIR) || defined(rewinddir)
2808 register IO *io = GvIOn(gv);
2810 if (!io || !IoDIRP(io))
2813 (void)rewinddir(IoDIRP(io));
2817 SETERRNO(EBADF,RMS$_ISI);
2820 DIE(no_dir_func, "rewinddir");
2827 #if defined(Direntry_t) && defined(HAS_READDIR)
2829 register IO *io = GvIOn(gv);
2831 if (!io || !IoDIRP(io))
2834 #ifdef VOID_CLOSEDIR
2835 closedir(IoDIRP(io));
2837 if (closedir(IoDIRP(io)) < 0) {
2838 IoDIRP(io) = 0; /* Don't try to close again--coredumps on SysV */
2847 SETERRNO(EBADF,RMS$_IFI);
2850 DIE(no_dir_func, "closedir");
2854 /* Process control. */
2869 if (tmpgv = gv_fetchpv("$", TRUE, SVt_PV))
2870 sv_setiv(GvSV(tmpgv), (I32)getpid());
2871 hv_clear(pidstatus); /* no kids, so don't wait for 'em */
2876 DIE(no_func, "Unsupported function fork");
2882 #if !defined(DOSISH) || defined(OS2)
2887 childpid = wait4pid(-1, &argflags, 0);
2888 STATUS_NATIVE_SET((childpid > 0) ? argflags : -1);
2892 DIE(no_func, "Unsupported function wait");
2898 #if !defined(DOSISH) || defined(OS2)
2906 childpid = wait4pid(childpid, &argflags, optype);
2907 STATUS_NATIVE_SET((childpid > 0) ? argflags : -1);
2911 DIE(no_func, "Unsupported function wait");
2917 dSP; dMARK; dORIGMARK; dTARGET;
2922 Sigsave_t ihand,qhand; /* place to save signals during system() */
2924 #if (defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(OS2)
2925 if (SP - MARK == 1) {
2927 char *junk = SvPV(TOPs, na);
2929 TAINT_PROPER("system");
2932 while ((childpid = vfork()) == -1) {
2933 if (errno != EAGAIN) {
2942 rsignal_save(SIGINT, SIG_IGN, &ihand);
2943 rsignal_save(SIGQUIT, SIG_IGN, &qhand);
2945 result = wait4pid(childpid, &status, 0);
2946 } while (result == -1 && errno == EINTR);
2947 (void)rsignal_restore(SIGINT, &ihand);
2948 (void)rsignal_restore(SIGQUIT, &qhand);
2949 STATUS_NATIVE_SET(result == -1 ? -1 : status);
2950 do_execfree(); /* free any memory child malloced on vfork */
2952 PUSHi(STATUS_CURRENT);
2955 if (op->op_flags & OPf_STACKED) {
2956 SV *really = *++MARK;
2957 value = (I32)do_aexec(really, MARK, SP);
2959 else if (SP - MARK != 1)
2960 value = (I32)do_aexec(Nullsv, MARK, SP);
2962 value = (I32)do_exec(SvPVx(sv_mortalcopy(*SP), na));
2965 #else /* ! FORK or VMS or OS/2 */
2966 if (op->op_flags & OPf_STACKED) {
2967 SV *really = *++MARK;
2968 value = (I32)do_aspawn(really, MARK, SP);
2970 else if (SP - MARK != 1)
2971 value = (I32)do_aspawn(Nullsv, MARK, SP);
2973 value = (I32)do_spawn(SvPVx(sv_mortalcopy(*SP), na));
2975 STATUS_NATIVE_SET(value);
2978 PUSHi(STATUS_CURRENT);
2979 #endif /* !FORK or VMS */
2985 dSP; dMARK; dORIGMARK; dTARGET;
2988 if (op->op_flags & OPf_STACKED) {
2989 SV *really = *++MARK;
2990 value = (I32)do_aexec(really, MARK, SP);
2992 else if (SP - MARK != 1)
2994 value = (I32)vms_do_aexec(Nullsv, MARK, SP);
2996 value = (I32)do_aexec(Nullsv, MARK, SP);
3000 char *junk = SvPV(*SP, na);
3002 TAINT_PROPER("exec");
3005 value = (I32)vms_do_exec(SvPVx(sv_mortalcopy(*SP), na));
3007 value = (I32)do_exec(SvPVx(sv_mortalcopy(*SP), na));
3017 dSP; dMARK; dTARGET;
3020 value = (I32)apply(op->op_type, MARK, SP);
3025 DIE(no_func, "Unsupported function kill");
3033 XPUSHi( getppid() );
3036 DIE(no_func, "getppid");
3052 value = (I32)BSD_GETPGRP(pid);
3054 if (pid != 0 && pid != getpid())
3055 DIE("POSIX getpgrp can't take an argument");
3056 value = (I32)getpgrp();
3061 DIE(no_func, "getpgrp()");
3080 TAINT_PROPER("setpgrp");
3082 SETi( BSD_SETPGRP(pid, pgrp) >= 0 );
3084 if ((pgrp != 0 && pgrp != getpid())) || (pid != 0 && pid != getpid()))
3085 DIE("POSIX setpgrp can't take an argument");
3086 SETi( setpgrp() >= 0 );
3087 #endif /* USE_BSDPGRP */
3090 DIE(no_func, "setpgrp()");
3099 #ifdef HAS_GETPRIORITY
3102 SETi( getpriority(which, who) );
3105 DIE(no_func, "getpriority()");
3115 #ifdef HAS_SETPRIORITY
3119 TAINT_PROPER("setpriority");
3120 SETi( setpriority(which, who, niceval) >= 0 );
3123 DIE(no_func, "setpriority()");
3133 XPUSHn( time(Null(Time_t*)) );
3135 XPUSHi( time(Null(Time_t*)) );
3140 /* XXX The POSIX name is CLK_TCK; it is to be preferred
3141 to HZ. Probably. For now, assume that if the system
3142 defines HZ, it does so correctly. (Will this break
3144 Probably we ought to use _sysconf(_SC_CLK_TCK), if
3145 it's supported. --AD 9/96.
3161 DIE("times not implemented");
3166 (void)times(×buf);
3168 (void)times((tbuffer_t *)×buf); /* time.h uses different name for */
3169 /* struct tms, though same data */
3173 PUSHs(sv_2mortal(newSVnv(((double)timesbuf.tms_utime)/HZ)));
3174 if (GIMME == G_ARRAY) {
3175 PUSHs(sv_2mortal(newSVnv(((double)timesbuf.tms_stime)/HZ)));
3176 PUSHs(sv_2mortal(newSVnv(((double)timesbuf.tms_cutime)/HZ)));
3177 PUSHs(sv_2mortal(newSVnv(((double)timesbuf.tms_cstime)/HZ)));
3180 #endif /* HAS_TIMES */
3185 return pp_gmtime(ARGS);
3193 static char *dayname[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
3194 static char *monname[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
3195 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
3201 when = (Time_t)SvNVx(POPs);
3203 when = (Time_t)SvIVx(POPs);
3206 if (op->op_type == OP_LOCALTIME)
3207 tmbuf = localtime(&when);
3209 tmbuf = gmtime(&when);
3213 if (GIMME != G_ARRAY) {
3218 sprintf(mybuf, "%s %s %2d %02d:%02d:%02d %d",
3219 dayname[tmbuf->tm_wday],
3220 monname[tmbuf->tm_mon],
3225 tmbuf->tm_year + 1900);
3226 PUSHp(mybuf, strlen(mybuf));
3229 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_sec)));
3230 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_min)));
3231 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_hour)));
3232 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_mday)));
3233 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_mon)));
3234 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_year)));
3235 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_wday)));
3236 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_yday)));
3237 PUSHs(sv_2mortal(newSViv((I32)tmbuf->tm_isdst)));
3248 anum = alarm((unsigned int)anum);
3255 DIE(no_func, "Unsupported function alarm");
3266 (void)time(&lasttime);
3271 sleep((unsigned int)duration);
3274 XPUSHi(when - lasttime);
3278 /* Shared memory. */
3282 return pp_semget(ARGS);
3287 return pp_semctl(ARGS);
3292 return pp_shmwrite(ARGS);
3297 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
3298 dSP; dMARK; dTARGET;
3299 I32 value = (I32)(do_shmio(op->op_type, MARK, SP) >= 0);
3304 return pp_semget(ARGS);
3308 /* Message passing. */
3312 return pp_semget(ARGS);
3317 return pp_semctl(ARGS);
3322 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
3323 dSP; dMARK; dTARGET;
3324 I32 value = (I32)(do_msgsnd(MARK, SP) >= 0);
3329 return pp_semget(ARGS);
3335 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
3336 dSP; dMARK; dTARGET;
3337 I32 value = (I32)(do_msgrcv(MARK, SP) >= 0);
3342 return pp_semget(ARGS);
3350 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
3351 dSP; dMARK; dTARGET;
3352 int anum = do_ipcget(op->op_type, MARK, SP);
3359 DIE("System V IPC is not implemented on this machine");
3365 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
3366 dSP; dMARK; dTARGET;
3367 int anum = do_ipcctl(op->op_type, MARK, SP);
3375 PUSHp("0 but true",10);
3379 return pp_semget(ARGS);
3385 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
3386 dSP; dMARK; dTARGET;
3387 I32 value = (I32)(do_semop(MARK, SP) >= 0);
3392 return pp_semget(ARGS);
3396 /* Get system info. */
3401 return pp_ghostent(ARGS);
3403 DIE(no_sock_func, "gethostbyname");
3410 return pp_ghostent(ARGS);
3412 DIE(no_sock_func, "gethostbyaddr");
3420 I32 which = op->op_type;
3421 register char **elem;
3423 struct hostent *gethostbyname();
3424 struct hostent *gethostbyaddr();
3425 #ifdef HAS_GETHOSTENT
3426 struct hostent *gethostent();
3428 struct hostent *hent;
3432 if (which == OP_GHBYNAME) {
3433 hent = gethostbyname(POPp);
3435 else if (which == OP_GHBYADDR) {
3436 int addrtype = POPi;
3439 char *addr = SvPV(addrsv, addrlen);
3441 hent = gethostbyaddr(addr, addrlen, addrtype);
3444 #ifdef HAS_GETHOSTENT
3445 hent = gethostent();
3447 DIE("gethostent not implemented");
3450 #ifdef HOST_NOT_FOUND
3452 STATUS_NATIVE_SET(h_errno);
3455 if (GIMME != G_ARRAY) {
3456 PUSHs(sv = sv_newmortal());
3458 if (which == OP_GHBYNAME) {
3460 sv_setpvn(sv, hent->h_addr, hent->h_length);
3463 sv_setpv(sv, (char*)hent->h_name);
3469 PUSHs(sv = sv_mortalcopy(&sv_no));
3470 sv_setpv(sv, (char*)hent->h_name);
3471 PUSHs(sv = sv_mortalcopy(&sv_no));
3472 for (elem = hent->h_aliases; elem && *elem; elem++) {
3473 sv_catpv(sv, *elem);
3475 sv_catpvn(sv, " ", 1);
3477 PUSHs(sv = sv_mortalcopy(&sv_no));
3478 sv_setiv(sv, (I32)hent->h_addrtype);
3479 PUSHs(sv = sv_mortalcopy(&sv_no));
3480 len = hent->h_length;
3481 sv_setiv(sv, (I32)len);
3483 for (elem = hent->h_addr_list; elem && *elem; elem++) {
3484 XPUSHs(sv = sv_mortalcopy(&sv_no));
3485 sv_setpvn(sv, *elem, len);
3488 PUSHs(sv = sv_mortalcopy(&sv_no));
3490 sv_setpvn(sv, hent->h_addr, len);
3495 DIE(no_sock_func, "gethostent");
3502 return pp_gnetent(ARGS);
3504 DIE(no_sock_func, "getnetbyname");
3511 return pp_gnetent(ARGS);
3513 DIE(no_sock_func, "getnetbyaddr");
3521 I32 which = op->op_type;
3522 register char **elem;
3524 struct netent *getnetbyname();
3525 struct netent *getnetbyaddr();
3526 struct netent *getnetent();
3527 struct netent *nent;
3529 if (which == OP_GNBYNAME)
3530 nent = getnetbyname(POPp);
3531 else if (which == OP_GNBYADDR) {
3532 int addrtype = POPi;
3533 unsigned long addr = U_L(POPn);
3534 nent = getnetbyaddr((long)addr, addrtype);
3540 if (GIMME != G_ARRAY) {
3541 PUSHs(sv = sv_newmortal());
3543 if (which == OP_GNBYNAME)
3544 sv_setiv(sv, (I32)nent->n_net);
3546 sv_setpv(sv, nent->n_name);
3552 PUSHs(sv = sv_mortalcopy(&sv_no));
3553 sv_setpv(sv, nent->n_name);
3554 PUSHs(sv = sv_mortalcopy(&sv_no));
3555 for (elem = nent->n_aliases; *elem; elem++) {
3556 sv_catpv(sv, *elem);
3558 sv_catpvn(sv, " ", 1);
3560 PUSHs(sv = sv_mortalcopy(&sv_no));
3561 sv_setiv(sv, (I32)nent->n_addrtype);
3562 PUSHs(sv = sv_mortalcopy(&sv_no));
3563 sv_setiv(sv, (I32)nent->n_net);
3568 DIE(no_sock_func, "getnetent");
3575 return pp_gprotoent(ARGS);
3577 DIE(no_sock_func, "getprotobyname");
3584 return pp_gprotoent(ARGS);
3586 DIE(no_sock_func, "getprotobynumber");
3594 I32 which = op->op_type;
3595 register char **elem;
3597 struct protoent *getprotobyname();
3598 struct protoent *getprotobynumber();
3599 struct protoent *getprotoent();
3600 struct protoent *pent;
3602 if (which == OP_GPBYNAME)
3603 pent = getprotobyname(POPp);
3604 else if (which == OP_GPBYNUMBER)
3605 pent = getprotobynumber(POPi);
3607 pent = getprotoent();
3610 if (GIMME != G_ARRAY) {
3611 PUSHs(sv = sv_newmortal());
3613 if (which == OP_GPBYNAME)
3614 sv_setiv(sv, (I32)pent->p_proto);
3616 sv_setpv(sv, pent->p_name);
3622 PUSHs(sv = sv_mortalcopy(&sv_no));
3623 sv_setpv(sv, pent->p_name);
3624 PUSHs(sv = sv_mortalcopy(&sv_no));
3625 for (elem = pent->p_aliases; *elem; elem++) {
3626 sv_catpv(sv, *elem);
3628 sv_catpvn(sv, " ", 1);
3630 PUSHs(sv = sv_mortalcopy(&sv_no));
3631 sv_setiv(sv, (I32)pent->p_proto);
3636 DIE(no_sock_func, "getprotoent");
3643 return pp_gservent(ARGS);
3645 DIE(no_sock_func, "getservbyname");
3652 return pp_gservent(ARGS);
3654 DIE(no_sock_func, "getservbyport");
3662 I32 which = op->op_type;
3663 register char **elem;
3665 struct servent *getservbyname();
3666 struct servent *getservbynumber();
3667 struct servent *getservent();
3668 struct servent *sent;
3670 if (which == OP_GSBYNAME) {
3674 if (proto && !*proto)
3677 sent = getservbyname(name, proto);
3679 else if (which == OP_GSBYPORT) {
3681 unsigned short port = POPu;
3686 sent = getservbyport(port, proto);
3689 sent = getservent();
3692 if (GIMME != G_ARRAY) {
3693 PUSHs(sv = sv_newmortal());
3695 if (which == OP_GSBYNAME) {
3697 sv_setiv(sv, (I32)ntohs(sent->s_port));
3699 sv_setiv(sv, (I32)(sent->s_port));
3703 sv_setpv(sv, sent->s_name);
3709 PUSHs(sv = sv_mortalcopy(&sv_no));
3710 sv_setpv(sv, sent->s_name);
3711 PUSHs(sv = sv_mortalcopy(&sv_no));
3712 for (elem = sent->s_aliases; *elem; elem++) {
3713 sv_catpv(sv, *elem);
3715 sv_catpvn(sv, " ", 1);
3717 PUSHs(sv = sv_mortalcopy(&sv_no));
3719 sv_setiv(sv, (I32)ntohs(sent->s_port));
3721 sv_setiv(sv, (I32)(sent->s_port));
3723 PUSHs(sv = sv_mortalcopy(&sv_no));
3724 sv_setpv(sv, sent->s_proto);
3729 DIE(no_sock_func, "getservent");
3740 DIE(no_sock_func, "sethostent");
3751 DIE(no_sock_func, "setnetent");
3762 DIE(no_sock_func, "setprotoent");
3773 DIE(no_sock_func, "setservent");
3785 DIE(no_sock_func, "endhostent");
3797 DIE(no_sock_func, "endnetent");
3809 DIE(no_sock_func, "endprotoent");
3821 DIE(no_sock_func, "endservent");
3828 return pp_gpwent(ARGS);
3830 DIE(no_func, "getpwnam");
3837 return pp_gpwent(ARGS);
3839 DIE(no_func, "getpwuid");
3847 I32 which = op->op_type;
3849 struct passwd *pwent;
3851 if (which == OP_GPWNAM)
3852 pwent = getpwnam(POPp);
3853 else if (which == OP_GPWUID)
3854 pwent = getpwuid(POPi);
3856 pwent = (struct passwd *)getpwent();
3859 if (GIMME != G_ARRAY) {
3860 PUSHs(sv = sv_newmortal());
3862 if (which == OP_GPWNAM)
3863 sv_setiv(sv, (I32)pwent->pw_uid);
3865 sv_setpv(sv, pwent->pw_name);
3871 PUSHs(sv = sv_mortalcopy(&sv_no));
3872 sv_setpv(sv, pwent->pw_name);
3873 PUSHs(sv = sv_mortalcopy(&sv_no));
3874 sv_setpv(sv, pwent->pw_passwd);
3875 PUSHs(sv = sv_mortalcopy(&sv_no));
3876 sv_setiv(sv, (I32)pwent->pw_uid);
3877 PUSHs(sv = sv_mortalcopy(&sv_no));
3878 sv_setiv(sv, (I32)pwent->pw_gid);
3879 PUSHs(sv = sv_mortalcopy(&sv_no));
3881 sv_setiv(sv, (I32)pwent->pw_change);
3884 sv_setiv(sv, (I32)pwent->pw_quota);
3887 sv_setpv(sv, pwent->pw_age);
3891 PUSHs(sv = sv_mortalcopy(&sv_no));
3893 sv_setpv(sv, pwent->pw_class);
3896 sv_setpv(sv, pwent->pw_comment);
3899 PUSHs(sv = sv_mortalcopy(&sv_no));
3900 sv_setpv(sv, pwent->pw_gecos);
3901 PUSHs(sv = sv_mortalcopy(&sv_no));
3902 sv_setpv(sv, pwent->pw_dir);
3903 PUSHs(sv = sv_mortalcopy(&sv_no));
3904 sv_setpv(sv, pwent->pw_shell);
3906 PUSHs(sv = sv_mortalcopy(&sv_no));
3907 sv_setiv(sv, (I32)pwent->pw_expire);
3912 DIE(no_func, "getpwent");
3923 DIE(no_func, "setpwent");
3934 DIE(no_func, "endpwent");
3941 return pp_ggrent(ARGS);
3943 DIE(no_func, "getgrnam");
3950 return pp_ggrent(ARGS);
3952 DIE(no_func, "getgrgid");
3960 I32 which = op->op_type;
3961 register char **elem;
3963 struct group *grent;
3965 if (which == OP_GGRNAM)
3966 grent = (struct group *)getgrnam(POPp);
3967 else if (which == OP_GGRGID)
3968 grent = (struct group *)getgrgid(POPi);
3970 grent = (struct group *)getgrent();
3973 if (GIMME != G_ARRAY) {
3974 PUSHs(sv = sv_newmortal());
3976 if (which == OP_GGRNAM)
3977 sv_setiv(sv, (I32)grent->gr_gid);
3979 sv_setpv(sv, grent->gr_name);
3985 PUSHs(sv = sv_mortalcopy(&sv_no));
3986 sv_setpv(sv, grent->gr_name);
3987 PUSHs(sv = sv_mortalcopy(&sv_no));
3988 sv_setpv(sv, grent->gr_passwd);
3989 PUSHs(sv = sv_mortalcopy(&sv_no));
3990 sv_setiv(sv, (I32)grent->gr_gid);
3991 PUSHs(sv = sv_mortalcopy(&sv_no));
3992 for (elem = grent->gr_mem; *elem; elem++) {
3993 sv_catpv(sv, *elem);
3995 sv_catpvn(sv, " ", 1);
4001 DIE(no_func, "getgrent");
4012 DIE(no_func, "setgrent");
4023 DIE(no_func, "endgrent");
4033 if (!(tmps = getlogin()))
4035 PUSHp(tmps, strlen(tmps));
4038 DIE(no_func, "getlogin");
4042 /* Miscellaneous. */
4047 dSP; dMARK; dORIGMARK; dTARGET;
4048 register I32 items = SP - MARK;
4049 unsigned long a[20];
4055 while (++MARK <= SP) {
4056 if (SvTAINTED(*MARK)) {
4062 TAINT_PROPER("syscall");
4065 /* This probably won't work on machines where sizeof(long) != sizeof(int)
4066 * or where sizeof(long) != sizeof(char*). But such machines will
4067 * not likely have syscall implemented either, so who cares?
4069 while (++MARK <= SP) {
4070 if (SvNIOK(*MARK) || !i)
4071 a[i++] = SvIV(*MARK);
4072 else if (*MARK == &sv_undef)
4075 a[i++] = (unsigned long)SvPV_force(*MARK, na);
4081 DIE("Too many args to syscall");
4083 DIE("Too few args to syscall");
4085 retval = syscall(a[0]);
4088 retval = syscall(a[0],a[1]);
4091 retval = syscall(a[0],a[1],a[2]);
4094 retval = syscall(a[0],a[1],a[2],a[3]);
4097 retval = syscall(a[0],a[1],a[2],a[3],a[4]);
4100 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5]);
4103 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6]);
4106 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7]);
4110 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8]);
4113 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8],a[9]);
4116 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8],a[9],
4120 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8],a[9],
4124 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8],a[9],
4128 retval = syscall(a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8],a[9],
4129 a[10],a[11],a[12],a[13]);
4131 #endif /* atarist */
4137 DIE(no_func, "syscall");
4141 #ifdef FCNTL_EMULATE_FLOCK
4143 /* XXX Emulate flock() with fcntl().
4144 What's really needed is a good file locking module.
4148 fcntl_emulate_flock(fd, operation)
4154 switch (operation & ~LOCK_NB) {
4156 flock.l_type = F_RDLCK;
4159 flock.l_type = F_WRLCK;
4162 flock.l_type = F_UNLCK;
4168 flock.l_whence = SEEK_SET;
4169 flock.l_start = flock.l_len = 0L;
4171 return fcntl(fd, (operation & LOCK_NB) ? F_SETLK : F_SETLKW, &flock);
4174 #endif /* FCNTL_EMULATE_FLOCK */
4176 #ifdef LOCKF_EMULATE_FLOCK
4178 /* XXX Emulate flock() with lockf(). This is just to increase
4179 portability of scripts. The calls are not completely
4180 interchangeable. What's really needed is a good file
4184 /* The lockf() constants might have been defined in <unistd.h>.
4185 Unfortunately, <unistd.h> causes troubles on some mixed
4186 (BSD/POSIX) systems, such as SunOS 4.1.3.
4188 Further, the lockf() constants aren't POSIX, so they might not be
4189 visible if we're compiling with _POSIX_SOURCE defined. Thus, we'll
4190 just stick in the SVID values and be done with it. Sigh.
4194 # define F_ULOCK 0 /* Unlock a previously locked region */
4197 # define F_LOCK 1 /* Lock a region for exclusive use */
4200 # define F_TLOCK 2 /* Test and lock a region for exclusive use */
4203 # define F_TEST 3 /* Test a region for other processes locks */
4207 lockf_emulate_flock (fd, operation)
4212 switch (operation) {
4214 /* LOCK_SH - get a shared lock */
4216 /* LOCK_EX - get an exclusive lock */
4218 i = lockf (fd, F_LOCK, 0);
4221 /* LOCK_SH|LOCK_NB - get a non-blocking shared lock */
4222 case LOCK_SH|LOCK_NB:
4223 /* LOCK_EX|LOCK_NB - get a non-blocking exclusive lock */
4224 case LOCK_EX|LOCK_NB:
4225 i = lockf (fd, F_TLOCK, 0);
4227 if ((errno == EAGAIN) || (errno == EACCES))
4228 errno = EWOULDBLOCK;
4231 /* LOCK_UN - unlock (non-blocking is a no-op) */
4233 case LOCK_UN|LOCK_NB:
4234 i = lockf (fd, F_ULOCK, 0);
4237 /* Default - can't decipher operation */
4246 #endif /* LOCKF_EMULATE_FLOCK */