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 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
12 * come here, and I don't want to see no more magic,' he said, and fell silent."
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
30 # define VTBL this->*vtbl
33 static void restore_magic _((void *p));
37 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
45 /* MGS is typedef'ed to struct magic_state in perl.h */
48 save_magic(I32 mgs_ix, SV *sv)
52 assert(SvMAGICAL(sv));
54 SAVEDESTRUCTOR(restore_magic, (void*)mgs_ix);
56 mgs = SSPTR(mgs_ix, MGS*);
58 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
59 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
63 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
67 restore_magic(void *p)
70 MGS* mgs = SSPTR((I32)p, MGS*);
76 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
79 SvFLAGS(sv) |= mgs->mgs_flags;
83 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
86 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
88 /* If we're still on top of the stack, pop us off. (That condition
89 * will be satisfied if restore_magic was called explicitly, but *not*
90 * if it's being called via leave_scope.)
91 * The reason for doing this is that otherwise, things like sv_2cv()
92 * may leave alloc gunk on the savestack, and some code
93 * (e.g. sighandler) doesn't expect that...
95 if (PL_savestack_ix == mgs->mgs_ss_ix)
97 I32 popval = SSPOPINT;
98 assert(popval == SAVEt_DESTRUCTOR);
101 assert(popval == SAVEt_ALLOC);
103 PL_savestack_ix -= popval;
112 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
113 MGVTBL* vtbl = mg->mg_virtual;
115 if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP))
119 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL))
134 mgs_ix = SSNEW(sizeof(MGS));
135 save_magic(mgs_ix, sv);
138 while ((mg = *mgp) != 0) {
139 MGVTBL* vtbl = mg->mg_virtual;
140 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) {
141 (VTBL->svt_get)(sv, mg);
142 /* Ignore this magic if it's been deleted */
143 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
144 (mg->mg_flags & MGf_GSKIP))
145 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
147 /* Advance to next magic (complicated by possible deletion) */
148 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
149 mgp = &mg->mg_moremagic;
153 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
156 restore_magic((void*)mgs_ix);
168 mgs_ix = SSNEW(sizeof(MGS));
169 save_magic(mgs_ix, sv);
171 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
172 MGVTBL* vtbl = mg->mg_virtual;
173 nextmg = mg->mg_moremagic; /* it may delete itself */
174 if (mg->mg_flags & MGf_GSKIP) {
175 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
176 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
178 if (vtbl && (vtbl->svt_set != NULL))
179 (VTBL->svt_set)(sv, mg);
182 restore_magic((void*)mgs_ix);
193 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
194 MGVTBL* vtbl = mg->mg_virtual;
195 if (vtbl && (vtbl->svt_len != NULL)) {
198 mgs_ix = SSNEW(sizeof(MGS));
199 save_magic(mgs_ix, sv);
200 /* omit MGf_GSKIP -- not changed here */
201 len = (VTBL->svt_len)(sv, mg);
202 restore_magic((void*)mgs_ix);
207 junk = SvPV(sv, len);
217 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
218 MGVTBL* vtbl = mg->mg_virtual;
219 if (vtbl && (vtbl->svt_len != NULL)) {
222 mgs_ix = SSNEW(sizeof(MGS));
223 save_magic(mgs_ix, sv);
224 /* omit MGf_GSKIP -- not changed here */
225 len = (VTBL->svt_len)(sv, mg);
226 restore_magic((void*)mgs_ix);
233 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
238 croak("Size magic not implemented");
250 mgs_ix = SSNEW(sizeof(MGS));
251 save_magic(mgs_ix, sv);
253 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
254 MGVTBL* vtbl = mg->mg_virtual;
255 /* omit GSKIP -- never set here */
257 if (vtbl && (vtbl->svt_clear != NULL))
258 (VTBL->svt_clear)(sv, mg);
261 restore_magic((void*)mgs_ix);
266 mg_find(SV *sv, int type)
269 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
270 if (mg->mg_type == type)
277 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
281 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
282 if (isUPPER(mg->mg_type)) {
283 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
295 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
296 MGVTBL* vtbl = mg->mg_virtual;
297 moremagic = mg->mg_moremagic;
298 if (vtbl && (vtbl->svt_free != NULL))
299 (VTBL->svt_free)(sv, mg);
300 if (mg->mg_ptr && mg->mg_type != 'g')
302 Safefree(mg->mg_ptr);
303 else if (mg->mg_len == HEf_SVKEY)
304 SvREFCNT_dec((SV*)mg->mg_ptr);
305 if (mg->mg_flags & MGf_REFCOUNTED)
306 SvREFCNT_dec(mg->mg_obj);
313 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
318 magic_regdata_cnt(SV *sv, MAGIC *mg)
326 if (PL_curpm && (rx = PL_curpm->op_pmregexp))
327 return rx->lastparen;
332 magic_regdatum_get(SV *sv, MAGIC *mg)
341 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
345 if (paren <= rx->nparens &&
346 (s = rx->startp[paren]) &&
347 (t = rx->endp[paren]))
349 if (mg->mg_obj) /* @+ */
360 magic_len(SV *sv, MAGIC *mg)
369 switch (*mg->mg_ptr) {
370 case '1': case '2': case '3': case '4':
371 case '5': case '6': case '7': case '8': case '9': case '&':
372 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
373 paren = atoi(mg->mg_ptr);
375 if (paren <= rx->nparens &&
376 (s = rx->startp[paren]) &&
377 (t = rx->endp[paren]))
386 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
387 paren = rx->lastparen;
393 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
394 if ((s = rx->subbeg) && rx->startp[0]) {
395 i = rx->startp[0] - s;
402 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
403 if (rx->subend && (s = rx->endp[0])) {
411 return (STRLEN)PL_ofslen;
413 return (STRLEN)PL_orslen;
416 if (!SvPOK(sv) && SvNIOK(sv))
433 static char buffer[50] ;
438 sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ;
440 for (i = 0; i < SvCUR(sv) ; ++ i) {
441 sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ;
442 strcat(buffer, buf1) ;
452 magic_get(SV *sv, MAGIC *mg)
461 switch (*mg->mg_ptr) {
462 case '\001': /* ^A */
463 sv_setsv(sv, PL_bodytarget);
465 case '\002': /* ^B */
466 /* printf("magic_get $^B: ") ; */
467 if (PL_curcop->cop_warnings == WARN_NONE)
468 /* printf("WARN_NONE\n"), */
469 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
470 else if (PL_curcop->cop_warnings == WARN_ALL)
471 /* printf("WARN_ALL\n"), */
472 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
474 /* printf("some %s\n", printW(PL_curcop->cop_warnings)), */
475 sv_setsv(sv, PL_curcop->cop_warnings);
477 case '\004': /* ^D */
478 sv_setiv(sv, (IV)(PL_debug & 32767));
480 case '\005': /* ^E */
483 # include <descrip.h>
484 # include <starlet.h>
486 $DESCRIPTOR(msgdsc,msg);
487 sv_setnv(sv,(double) vaxc$errno);
488 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
489 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
495 if (!(_emx_env & 0x200)) { /* Under DOS */
496 sv_setnv(sv, (double)errno);
497 sv_setpv(sv, errno ? Strerror(errno) : "");
499 if (errno != errno_isOS2) {
500 int tmp = _syserrno();
501 if (tmp) /* 2nd call to _syserrno() makes it 0 */
504 sv_setnv(sv, (double)Perl_rc);
505 sv_setpv(sv, os2error(Perl_rc));
510 DWORD dwErr = GetLastError();
511 sv_setnv(sv, (double)dwErr);
517 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
518 sv_setpvn(sv, sMsg, dwLen);
519 PerlProc_FreeBuf(sMsg);
521 win32_str_os_error(sv, dwErr);
529 sv_setnv(sv, (double)errno);
530 sv_setpv(sv, errno ? Strerror(errno) : "");
534 SvNOK_on(sv); /* what a wonderful hack! */
536 case '\006': /* ^F */
537 sv_setiv(sv, (IV)PL_maxsysfd);
539 case '\010': /* ^H */
540 sv_setiv(sv, (IV)PL_hints);
542 case '\011': /* ^I */ /* NOT \t in EBCDIC */
544 sv_setpv(sv, PL_inplace);
546 sv_setsv(sv, &PL_sv_undef);
548 case '\017': /* ^O */
549 sv_setpv(sv, PL_osname);
551 case '\020': /* ^P */
552 sv_setiv(sv, (IV)PL_perldb);
554 case '\023': /* ^S */
557 if (PL_lex_state != LEX_NOTPARSING)
565 case '\024': /* ^T */
567 sv_setnv(sv, PL_basetime);
569 sv_setiv(sv, (IV)PL_basetime);
572 case '\027': /* ^W */
573 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON));
575 case '1': case '2': case '3': case '4':
576 case '5': case '6': case '7': case '8': case '9': case '&':
577 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
579 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
580 * XXX Does the new way break anything?
582 paren = atoi(mg->mg_ptr);
584 if (paren <= rx->nparens &&
585 (s = rx->startp[paren]) &&
586 (t = rx->endp[paren]))
593 was_tainted = PL_tainted;
598 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
603 sv_setsv(sv,&PL_sv_undef);
606 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
607 paren = rx->lastparen;
611 sv_setsv(sv,&PL_sv_undef);
614 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
615 if ((s = rx->subbeg) && rx->startp[0]) {
616 i = rx->startp[0] - s;
620 sv_setsv(sv,&PL_sv_undef);
623 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
624 if (rx->subend && (s = rx->endp[0])) {
629 sv_setsv(sv,&PL_sv_undef);
633 if (GvIO(PL_last_in_gv)) {
634 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
640 sv_setiv(sv, (IV)STATUS_CURRENT);
641 #ifdef COMPLEX_STATUS
642 LvTARGOFF(sv) = PL_statusvalue;
643 LvTARGLEN(sv) = PL_statusvalue_vms;
648 s = IoTOP_NAME(GvIOp(PL_defoutgv));
652 sv_setpv(sv,GvENAME(PL_defoutgv));
657 s = IoFMT_NAME(GvIOp(PL_defoutgv));
659 s = GvENAME(PL_defoutgv);
664 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
667 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
670 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
678 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
681 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
684 sv_setpvn(sv,PL_ofs,PL_ofslen);
687 sv_setpvn(sv,PL_ors,PL_orslen);
690 sv_setpv(sv,PL_ofmt);
694 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
695 sv_setpv(sv, errno ? Strerror(errno) : "");
698 int saveerrno = errno;
699 sv_setnv(sv, (double)errno);
701 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
704 sv_setpv(sv, errno ? Strerror(errno) : "");
708 SvNOK_on(sv); /* what a wonderful hack! */
711 sv_setiv(sv, (IV)PL_uid);
714 sv_setiv(sv, (IV)PL_euid);
717 sv_setiv(sv, (IV)PL_gid);
718 sv_setpvf(sv, "%Vd", (IV)PL_gid);
721 sv_setiv(sv, (IV)PL_egid);
722 sv_setpvf(sv, "%Vd", (IV)PL_egid);
726 Groups_t gary[NGROUPS];
727 i = getgroups(NGROUPS,gary);
729 sv_catpvf(sv, " %Vd", (IV)gary[i]);
732 SvIOK_on(sv); /* what a wonderful hack! */
740 sv_setsv(sv, thr->errsv);
742 #endif /* USE_THREADS */
748 magic_getuvar(SV *sv, MAGIC *mg)
750 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
752 if (uf && uf->uf_val)
753 (*uf->uf_val)(uf->uf_index, sv);
758 magic_setenv(SV *sv, MAGIC *mg)
769 #ifdef DYNAMIC_ENV_FETCH
770 /* We just undefd an environment var. Is a replacement */
771 /* waiting in the wings? */
774 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
775 s = SvPV(*valp, len);
779 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
780 /* And you'll never guess what the dog had */
781 /* in its mouth... */
783 MgTAINTEDDIR_off(mg);
785 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
786 char pathbuf[256], eltbuf[256], *cp, *elt = s;
790 do { /* DCL$PATH may be a search list */
791 while (1) { /* as may dev portion of any element */
792 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
793 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
794 cando_by_name(S_IWUSR,0,elt) ) {
799 if ((cp = strchr(elt, ':')) != Nullch)
801 if (my_trnlnm(elt, eltbuf, j++))
807 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
810 if (s && klen == 4 && strEQ(ptr,"PATH")) {
811 char *strend = s + len;
816 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
819 if (i >= sizeof tmpbuf /* too long -- assume the worst */
821 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
828 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
834 magic_clearenv(SV *sv, MAGIC *mg)
836 my_setenv(MgPV(mg,PL_na),Nullch);
841 magic_set_all_env(SV *sv, MAGIC *mg)
844 die("Can't make list assignment to %%ENV on this system");
849 magic_clear_all_env(sv,mg);
850 hv_iterinit((HV*)sv);
851 while (entry = hv_iternext((HV*)sv)) {
853 my_setenv(hv_iterkey(entry, &keylen),
854 SvPV(hv_iterval((HV*)sv, entry), PL_na));
862 magic_clear_all_env(SV *sv, MAGIC *mg)
865 die("Can't make list assignment to %%ENV on this system");
868 char *envv = GetEnvironmentStrings();
872 char *end = strchr(cur,'=');
873 if (end && end != cur) {
875 my_setenv(cur,Nullch);
877 cur += strlen(end+1)+1;
879 else if ((len = strlen(cur)))
882 FreeEnvironmentStrings(envv);
886 if (environ == PL_origenviron)
887 New(901, environ, 1, char*);
889 for (i = 0; environ[i]; i++)
890 Safefree(environ[i]);
899 magic_getsig(SV *sv, MAGIC *mg)
902 /* Are we fetching a signal entry? */
903 i = whichsig(MgPV(mg,PL_na));
906 sv_setsv(sv,psig_ptr[i]);
908 Sighandler_t sigstate = rsignal_state(i);
910 /* cache state so we don't fetch it again */
911 if(sigstate == SIG_IGN)
912 sv_setpv(sv,"IGNORE");
914 sv_setsv(sv,&PL_sv_undef);
915 psig_ptr[i] = SvREFCNT_inc(sv);
922 magic_clearsig(SV *sv, MAGIC *mg)
925 /* Are we clearing a signal entry? */
926 i = whichsig(MgPV(mg,PL_na));
929 SvREFCNT_dec(psig_ptr[i]);
933 SvREFCNT_dec(psig_name[i]);
941 magic_setsig(SV *sv, MAGIC *mg)
950 if (strEQ(s,"__DIE__"))
952 else if (strEQ(s,"__WARN__"))
954 else if (strEQ(s,"__PARSE__"))
957 croak("No such hook: %s", s);
965 i = whichsig(s); /* ...no, a brick */
967 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
968 warner(WARN_SIGNAL, "No such signal: SIG%s", s);
971 SvREFCNT_dec(psig_name[i]);
972 SvREFCNT_dec(psig_ptr[i]);
973 psig_ptr[i] = SvREFCNT_inc(sv);
974 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
975 psig_name[i] = newSVpv(s, strlen(s));
976 SvREADONLY_on(psig_name[i]);
978 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
980 (void)rsignal(i, PL_sighandlerp);
982 *svp = SvREFCNT_inc(sv);
985 s = SvPV_force(sv,PL_na);
986 if (strEQ(s,"IGNORE")) {
988 (void)rsignal(i, SIG_IGN);
992 else if (strEQ(s,"DEFAULT") || !*s) {
994 (void)rsignal(i, SIG_DFL);
1000 * We should warn if HINT_STRICT_REFS, but without
1001 * access to a known hint bit in a known OP, we can't
1002 * tell whether HINT_STRICT_REFS is in force or not.
1004 if (!strchr(s,':') && !strchr(s,'\''))
1005 sv_setpv(sv, form("main::%s", s));
1007 (void)rsignal(i, PL_sighandlerp);
1009 *svp = SvREFCNT_inc(sv);
1015 magic_setisa(SV *sv, MAGIC *mg)
1017 PL_sub_generation++;
1024 magic_setamagic(SV *sv, MAGIC *mg)
1026 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1027 PL_amagic_generation++;
1031 #endif /* OVERLOAD */
1034 magic_getnkeys(SV *sv, MAGIC *mg)
1036 HV *hv = (HV*)LvTARG(sv);
1041 (void) hv_iterinit(hv);
1042 if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
1046 while (entry = hv_iternext(hv)) {
1052 sv_setiv(sv, (IV)i);
1057 magic_setnkeys(SV *sv, MAGIC *mg)
1060 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1065 /* caller is responsible for stack switching/cleanup */
1067 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1076 if (mg->mg_len >= 0)
1077 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
1078 else if (mg->mg_len == HEf_SVKEY)
1079 PUSHs((SV*)mg->mg_ptr);
1081 else if (mg->mg_type == 'p') {
1082 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1090 return perl_call_method(meth, flags);
1094 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1100 PUSHSTACKi(PERLSI_MAGIC);
1102 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
1103 sv_setsv(sv, *PL_stack_sp--);
1113 magic_getpack(SV *sv, MAGIC *mg)
1115 magic_methpack(sv,mg,"FETCH");
1117 mg->mg_flags |= MGf_GSKIP;
1122 magic_setpack(SV *sv, MAGIC *mg)
1126 PUSHSTACKi(PERLSI_MAGIC);
1127 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1134 magic_clearpack(SV *sv, MAGIC *mg)
1136 return magic_methpack(sv,mg,"DELETE");
1141 magic_sizepack(SV *sv, MAGIC *mg)
1148 PUSHSTACKi(PERLSI_MAGIC);
1149 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1150 sv = *PL_stack_sp--;
1151 retval = (U32) SvIV(sv)-1;
1159 int magic_wipepack(SV *sv, MAGIC *mg)
1164 PUSHSTACKi(PERLSI_MAGIC);
1168 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1175 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1178 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1182 PUSHSTACKi(PERLSI_MAGIC);
1190 if (perl_call_method(meth, G_SCALAR))
1191 sv_setsv(key, *PL_stack_sp--);
1200 magic_existspack(SV *sv, MAGIC *mg)
1202 return magic_methpack(sv,mg,"EXISTS");
1206 magic_setdbline(SV *sv, MAGIC *mg)
1216 svp = av_fetch(GvAV(gv),
1217 atoi(MgPV(mg,PL_na)), FALSE);
1218 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1221 warn("Can't break at that line\n");
1226 magic_getarylen(SV *sv, MAGIC *mg)
1229 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1234 magic_setarylen(SV *sv, MAGIC *mg)
1237 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1242 magic_getpos(SV *sv, MAGIC *mg)
1244 SV* lsv = LvTARG(sv);
1246 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1247 mg = mg_find(lsv, 'g');
1248 if (mg && mg->mg_len >= 0) {
1252 sv_pos_b2u(lsv, &i);
1253 sv_setiv(sv, i + PL_curcop->cop_arybase);
1262 magic_setpos(SV *sv, MAGIC *mg)
1264 SV* lsv = LvTARG(sv);
1272 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1273 mg = mg_find(lsv, 'g');
1277 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1278 mg = mg_find(lsv, 'g');
1280 else if (!SvOK(sv)) {
1284 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1286 pos = SvIV(sv) - PL_curcop->cop_arybase;
1289 ulen = sv_len_utf8(lsv);
1306 sv_pos_u2b(lsv, &p, 0);
1311 mg->mg_flags &= ~MGf_MINMATCH;
1317 magic_getglob(SV *sv, MAGIC *mg)
1319 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1321 gv_efullname3(sv,((GV*)sv), "*");
1325 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1330 magic_setglob(SV *sv, MAGIC *mg)
1337 s = SvPV(sv, PL_na);
1338 if (*s == '*' && s[1])
1340 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1345 GvGP(sv) = gp_ref(GvGP(gv));
1350 magic_getsubstr(SV *sv, MAGIC *mg)
1353 SV *lsv = LvTARG(sv);
1354 char *tmps = SvPV(lsv,len);
1355 I32 offs = LvTARGOFF(sv);
1356 I32 rem = LvTARGLEN(sv);
1360 if (rem + offs > len)
1362 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1367 magic_setsubstr(SV *sv, MAGIC *mg)
1370 char *tmps = SvPV(sv,len);
1371 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1376 magic_gettaint(SV *sv, MAGIC *mg)
1379 TAINT_IF((mg->mg_len & 1) ||
1380 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1385 magic_settaint(SV *sv, MAGIC *mg)
1388 if (PL_localizing) {
1389 if (PL_localizing == 1)
1394 else if (PL_tainted)
1402 magic_getvec(SV *sv, MAGIC *mg)
1404 SV *lsv = LvTARG(sv);
1406 unsigned long retnum;
1416 s = (unsigned char *) SvPV(lsv, lsvlen);
1417 offset = LvTARGOFF(sv);
1418 size = LvTARGLEN(sv);
1419 len = (offset + size + 7) / 8;
1421 /* Copied from pp_vec() */
1429 if (offset >= lsvlen)
1432 retnum = (unsigned long) s[offset] << 8;
1434 else if (size == 32) {
1435 if (offset >= lsvlen)
1437 else if (offset + 1 >= lsvlen)
1438 retnum = (unsigned long) s[offset] << 24;
1439 else if (offset + 2 >= lsvlen)
1440 retnum = ((unsigned long) s[offset] << 24) +
1441 ((unsigned long) s[offset + 1] << 16);
1443 retnum = ((unsigned long) s[offset] << 24) +
1444 ((unsigned long) s[offset + 1] << 16) +
1445 (s[offset + 2] << 8);
1450 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1455 else if (size == 16)
1456 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1457 else if (size == 32)
1458 retnum = ((unsigned long) s[offset] << 24) +
1459 ((unsigned long) s[offset + 1] << 16) +
1460 (s[offset + 2] << 8) + s[offset+3];
1463 sv_setuv(sv, (UV)retnum);
1468 magic_setvec(SV *sv, MAGIC *mg)
1470 do_vecset(sv); /* XXX slurp this routine */
1475 magic_getdefelem(SV *sv, MAGIC *mg)
1478 if (LvTARGLEN(sv)) {
1480 SV *ahv = LvTARG(sv);
1481 if (SvTYPE(ahv) == SVt_PVHV) {
1482 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1487 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1493 AV* av = (AV*)LvTARG(sv);
1494 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1495 targ = AvARRAY(av)[LvTARGOFF(sv)];
1497 if (targ && targ != &PL_sv_undef) {
1498 dTHR; /* just for SvREFCNT_dec */
1499 /* somebody else defined it for us */
1500 SvREFCNT_dec(LvTARG(sv));
1501 LvTARG(sv) = SvREFCNT_inc(targ);
1503 SvREFCNT_dec(mg->mg_obj);
1504 mg->mg_obj = Nullsv;
1505 mg->mg_flags &= ~MGf_REFCOUNTED;
1510 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1515 magic_setdefelem(SV *sv, MAGIC *mg)
1520 sv_setsv(LvTARG(sv), sv);
1521 SvSETMAGIC(LvTARG(sv));
1527 vivify_defelem(SV *sv)
1529 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1533 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1536 SV *ahv = LvTARG(sv);
1537 if (SvTYPE(ahv) == SVt_PVHV) {
1538 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1543 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1547 if (!value || value == &PL_sv_undef)
1548 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1551 AV* av = (AV*)LvTARG(sv);
1552 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1553 LvTARG(sv) = Nullsv; /* array can't be extended */
1555 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1556 if (!svp || (value = *svp) == &PL_sv_undef)
1557 croak(no_aelem, (I32)LvTARGOFF(sv));
1560 (void)SvREFCNT_inc(value);
1561 SvREFCNT_dec(LvTARG(sv));
1564 SvREFCNT_dec(mg->mg_obj);
1565 mg->mg_obj = Nullsv;
1566 mg->mg_flags &= ~MGf_REFCOUNTED;
1570 magic_setmglob(SV *sv, MAGIC *mg)
1578 magic_setbm(SV *sv, MAGIC *mg)
1580 sv_unmagic(sv, 'B');
1586 magic_setfm(SV *sv, MAGIC *mg)
1588 sv_unmagic(sv, 'f');
1594 magic_setuvar(SV *sv, MAGIC *mg)
1596 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1598 if (uf && uf->uf_set)
1599 (*uf->uf_set)(uf->uf_index, sv);
1604 magic_freeregexp(SV *sv, MAGIC *mg)
1606 regexp *re = (regexp *)mg->mg_obj;
1611 #ifdef USE_LOCALE_COLLATE
1613 magic_setcollxfrm(SV *sv, MAGIC *mg)
1616 * RenE<eacute> Descartes said "I think not."
1617 * and vanished with a faint plop.
1620 Safefree(mg->mg_ptr);
1626 #endif /* USE_LOCALE_COLLATE */
1629 magic_set(SV *sv, MAGIC *mg)
1635 switch (*mg->mg_ptr) {
1636 case '\001': /* ^A */
1637 sv_setsv(PL_bodytarget, sv);
1639 case '\002': /* ^B */
1640 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1641 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize))
1642 PL_compiling.cop_warnings = WARN_ALL;
1643 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1644 PL_compiling.cop_warnings = WARN_NONE;
1646 if (PL_compiling.cop_warnings != WARN_NONE &&
1647 PL_compiling.cop_warnings != WARN_ALL)
1648 sv_setsv(PL_compiling.cop_warnings, sv);
1650 PL_compiling.cop_warnings = newSVsv(sv) ;
1654 case '\004': /* ^D */
1655 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1656 DEBUG_x(dump_all());
1658 case '\005': /* ^E */
1660 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1663 SetLastError( SvIV(sv) );
1665 /* will anyone ever use this? */
1666 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1670 case '\006': /* ^F */
1671 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1673 case '\010': /* ^H */
1674 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1676 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1678 Safefree(PL_inplace);
1680 PL_inplace = savepv(SvPV(sv,PL_na));
1682 PL_inplace = Nullch;
1684 case '\017': /* ^O */
1686 Safefree(PL_osname);
1688 PL_osname = savepv(SvPV(sv,PL_na));
1692 case '\020': /* ^P */
1693 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1695 case '\024': /* ^T */
1697 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1699 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1702 case '\027': /* ^W */
1703 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1704 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1705 PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ;
1709 if (PL_localizing) {
1710 if (PL_localizing == 1)
1711 save_sptr((SV**)&PL_last_in_gv);
1713 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1714 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1717 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1718 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1719 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1722 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1723 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1724 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1727 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1730 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1731 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1732 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1735 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1739 IO *io = GvIOp(PL_defoutgv);
1740 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1741 IoFLAGS(io) &= ~IOf_FLUSH;
1743 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1744 PerlIO *ofp = IoOFP(io);
1746 (void)PerlIO_flush(ofp);
1747 IoFLAGS(io) |= IOf_FLUSH;
1753 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1754 PL_multiline = (i != 0);
1757 SvREFCNT_dec(PL_nrs);
1758 PL_nrs = newSVsv(sv);
1759 SvREFCNT_dec(PL_rs);
1760 PL_rs = SvREFCNT_inc(PL_nrs);
1765 if (SvOK(sv) || SvGMAGICAL(sv))
1766 PL_ors = savepv(SvPV(sv,PL_orslen));
1775 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1780 PL_ofmt = savepv(SvPV(sv,PL_na));
1783 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1786 #ifdef COMPLEX_STATUS
1787 if (PL_localizing == 2) {
1788 PL_statusvalue = LvTARGOFF(sv);
1789 PL_statusvalue_vms = LvTARGLEN(sv);
1793 #ifdef VMSISH_STATUS
1795 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1798 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1801 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1802 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1805 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1806 if (PL_delaymagic) {
1807 PL_delaymagic |= DM_RUID;
1808 break; /* don't do magic till later */
1811 (void)setruid((Uid_t)PL_uid);
1814 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1816 #ifdef HAS_SETRESUID
1817 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1819 if (PL_uid == PL_euid) /* special case $< = $> */
1820 (void)PerlProc_setuid(PL_uid);
1822 PL_uid = (I32)PerlProc_getuid();
1823 croak("setruid() not implemented");
1828 PL_uid = (I32)PerlProc_getuid();
1829 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1832 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1833 if (PL_delaymagic) {
1834 PL_delaymagic |= DM_EUID;
1835 break; /* don't do magic till later */
1838 (void)seteuid((Uid_t)PL_euid);
1841 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1843 #ifdef HAS_SETRESUID
1844 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1846 if (PL_euid == PL_uid) /* special case $> = $< */
1847 PerlProc_setuid(PL_euid);
1849 PL_euid = (I32)PerlProc_geteuid();
1850 croak("seteuid() not implemented");
1855 PL_euid = (I32)PerlProc_geteuid();
1856 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1859 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1860 if (PL_delaymagic) {
1861 PL_delaymagic |= DM_RGID;
1862 break; /* don't do magic till later */
1865 (void)setrgid((Gid_t)PL_gid);
1868 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1870 #ifdef HAS_SETRESGID
1871 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1873 if (PL_gid == PL_egid) /* special case $( = $) */
1874 (void)PerlProc_setgid(PL_gid);
1876 PL_gid = (I32)PerlProc_getgid();
1877 croak("setrgid() not implemented");
1882 PL_gid = (I32)PerlProc_getgid();
1883 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1886 #ifdef HAS_SETGROUPS
1888 char *p = SvPV(sv, PL_na);
1889 Groups_t gary[NGROUPS];
1891 SET_NUMERIC_STANDARD();
1894 PL_egid = I_V(atof(p));
1895 for (i = 0; i < NGROUPS; ++i) {
1896 while (*p && !isSPACE(*p))
1902 gary[i] = I_V(atof(p));
1905 (void)setgroups(i, gary);
1907 #else /* HAS_SETGROUPS */
1908 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1909 #endif /* HAS_SETGROUPS */
1910 if (PL_delaymagic) {
1911 PL_delaymagic |= DM_EGID;
1912 break; /* don't do magic till later */
1915 (void)setegid((Gid_t)PL_egid);
1918 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1920 #ifdef HAS_SETRESGID
1921 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1923 if (PL_egid == PL_gid) /* special case $) = $( */
1924 (void)PerlProc_setgid(PL_egid);
1926 PL_egid = (I32)PerlProc_getegid();
1927 croak("setegid() not implemented");
1932 PL_egid = (I32)PerlProc_getegid();
1933 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1936 PL_chopset = SvPV_force(sv,PL_na);
1942 /* See if all the arguments are contiguous in memory */
1943 for (i = 1; i < PL_origargc; i++) {
1944 if (PL_origargv[i] == s + 1
1946 || PL_origargv[i] == s + 2
1949 s += strlen(++s); /* this one is ok too */
1953 /* can grab env area too? */
1954 if (PL_origenviron && (PL_origenviron[0] == s + 1
1956 || (PL_origenviron[0] == s + 9 && (s += 8))
1959 my_setenv("NoNe SuCh", Nullch);
1960 /* force copy of environment */
1961 for (i = 0; PL_origenviron[i]; i++)
1962 if (PL_origenviron[i] == s + 1)
1967 PL_origalen = s - PL_origargv[0];
1969 s = SvPV_force(sv,len);
1971 if (i >= PL_origalen) {
1973 /* don't allow system to limit $0 seen by script */
1974 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1975 Copy(s, PL_origargv[0], i, char);
1976 s = PL_origargv[0]+i;
1980 Copy(s, PL_origargv[0], i, char);
1981 s = PL_origargv[0]+i;
1983 while (++i < PL_origalen)
1985 s = PL_origargv[0]+i;
1986 for (i = 1; i < PL_origargc; i++)
1987 PL_origargv[i] = Nullch;
1992 sv_setsv(thr->errsv, sv);
1994 #endif /* USE_THREADS */
2001 magic_mutexfree(SV *sv, MAGIC *mg)
2004 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
2005 (unsigned long)thr, (unsigned long)sv);)
2007 croak("panic: magic_mutexfree");
2008 MUTEX_DESTROY(MgMUTEXP(mg));
2009 COND_DESTROY(MgCONDP(mg));
2012 #endif /* USE_THREADS */
2017 register char **sigv;
2019 for (sigv = sig_name+1; *sigv; sigv++)
2020 if (strEQ(sig,*sigv))
2021 return sig_num[sigv - sig_name];
2023 if (strEQ(sig,"CHLD"))
2027 if (strEQ(sig,"CLD"))
2036 unwind_handler_stack(void *p)
2039 U32 flags = *(U32*)p;
2042 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2043 /* cxstack_ix-- Not needed, die already unwound it. */
2045 SvREFCNT_dec(sig_sv);
2054 SV *sv, *tSv = PL_Sv;
2058 I32 o_save_i = PL_savestack_ix, type;
2061 if (PL_savestack_ix + 15 <= PL_savestack_max)
2063 if (PL_markstack_ptr < PL_markstack_max - 2)
2065 if (PL_retstack_ix < PL_retstack_max - 2)
2067 if (PL_scopestack_ix < PL_scopestack_max - 3)
2071 die("Signal SIG%s received, but no signal handler set.\n",
2074 /* Max number of items pushed there is 3*n or 4. We cannot fix
2075 infinity, so we fix 4 (in fact 5): */
2077 PL_savestack_ix += 5; /* Protect save in progress. */
2078 o_save_i = PL_savestack_ix;
2079 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
2082 PL_markstack_ptr++; /* Protect mark. */
2085 PL_retstack[PL_retstack_ix] = NULL;
2088 PL_scopestack_ix += 1;
2089 /* sv_2cv is too complicated, try a simpler variant first: */
2090 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
2091 || SvTYPE(cv) != SVt_PVCV)
2092 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
2094 if (!cv || !CvROOT(cv)) {
2095 if (ckWARN(WARN_SIGNAL))
2096 warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2097 sig_name[sig], (gv ? GvENAME(gv)
2104 if(psig_name[sig]) {
2105 sv = SvREFCNT_inc(psig_name[sig]);
2109 sv = sv_newmortal();
2110 sv_setpv(sv,sig_name[sig]);
2113 PUSHSTACKi(PERLSI_SIGNAL);
2118 perl_call_sv((SV*)cv, G_DISCARD);
2123 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2129 PL_scopestack_ix -= 1;
2132 PL_op = myop; /* Apparently not needed... */
2134 PL_Sv = tSv; /* Restore global temporaries. */