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)) {
284 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) : mg->mg_obj,
285 toLOWER(mg->mg_type), key, klen);
297 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
298 MGVTBL* vtbl = mg->mg_virtual;
299 moremagic = mg->mg_moremagic;
300 if (vtbl && (vtbl->svt_free != NULL))
301 (VTBL->svt_free)(sv, mg);
302 if (mg->mg_ptr && mg->mg_type != 'g')
304 Safefree(mg->mg_ptr);
305 else if (mg->mg_len == HEf_SVKEY)
306 SvREFCNT_dec((SV*)mg->mg_ptr);
307 if (mg->mg_flags & MGf_REFCOUNTED)
308 SvREFCNT_dec(mg->mg_obj);
315 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
320 magic_regdata_cnt(SV *sv, MAGIC *mg)
328 if (PL_curpm && (rx = PL_curpm->op_pmregexp))
329 return rx->lastparen;
334 magic_regdatum_get(SV *sv, MAGIC *mg)
343 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
347 if (paren <= rx->nparens &&
348 (s = rx->startp[paren]) &&
349 (t = rx->endp[paren]))
351 if (mg->mg_obj) /* @+ */
362 magic_len(SV *sv, MAGIC *mg)
371 switch (*mg->mg_ptr) {
372 case '1': case '2': case '3': case '4':
373 case '5': case '6': case '7': case '8': case '9': case '&':
374 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
375 paren = atoi(mg->mg_ptr);
377 if (paren <= rx->nparens &&
378 (s = rx->startp[paren]) &&
379 (t = rx->endp[paren]))
388 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
389 paren = rx->lastparen;
395 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
396 if ((s = rx->subbeg) && rx->startp[0]) {
397 i = rx->startp[0] - s;
404 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
405 if (rx->subend && (s = rx->endp[0])) {
413 return (STRLEN)PL_ofslen;
415 return (STRLEN)PL_orslen;
418 if (!SvPOK(sv) && SvNIOK(sv))
435 static char buffer[50] ;
440 sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ;
442 for (i = 0; i < SvCUR(sv) ; ++ i) {
443 sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ;
444 strcat(buffer, buf1) ;
454 magic_get(SV *sv, MAGIC *mg)
463 switch (*mg->mg_ptr) {
464 case '\001': /* ^A */
465 sv_setsv(sv, PL_bodytarget);
467 case '\002': /* ^B */
468 /* printf("magic_get $^B: ") ; */
469 if (PL_curcop->cop_warnings == WARN_NONE)
470 /* printf("WARN_NONE\n"), */
471 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
472 else if (PL_curcop->cop_warnings == WARN_ALL)
473 /* printf("WARN_ALL\n"), */
474 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
476 /* printf("some %s\n", printW(PL_curcop->cop_warnings)), */
477 sv_setsv(sv, PL_curcop->cop_warnings);
479 case '\004': /* ^D */
480 sv_setiv(sv, (IV)(PL_debug & 32767));
482 case '\005': /* ^E */
485 # include <descrip.h>
486 # include <starlet.h>
488 $DESCRIPTOR(msgdsc,msg);
489 sv_setnv(sv,(double) vaxc$errno);
490 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
491 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
497 if (!(_emx_env & 0x200)) { /* Under DOS */
498 sv_setnv(sv, (double)errno);
499 sv_setpv(sv, errno ? Strerror(errno) : "");
501 if (errno != errno_isOS2) {
502 int tmp = _syserrno();
503 if (tmp) /* 2nd call to _syserrno() makes it 0 */
506 sv_setnv(sv, (double)Perl_rc);
507 sv_setpv(sv, os2error(Perl_rc));
512 DWORD dwErr = GetLastError();
513 sv_setnv(sv, (double)dwErr);
519 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
520 sv_setpvn(sv, sMsg, dwLen);
521 PerlProc_FreeBuf(sMsg);
523 win32_str_os_error(sv, dwErr);
531 sv_setnv(sv, (double)errno);
532 sv_setpv(sv, errno ? Strerror(errno) : "");
536 SvNOK_on(sv); /* what a wonderful hack! */
538 case '\006': /* ^F */
539 sv_setiv(sv, (IV)PL_maxsysfd);
541 case '\010': /* ^H */
542 sv_setiv(sv, (IV)PL_hints);
544 case '\011': /* ^I */ /* NOT \t in EBCDIC */
546 sv_setpv(sv, PL_inplace);
548 sv_setsv(sv, &PL_sv_undef);
550 case '\017': /* ^O */
551 sv_setpv(sv, PL_osname);
553 case '\020': /* ^P */
554 sv_setiv(sv, (IV)PL_perldb);
556 case '\023': /* ^S */
559 if (PL_lex_state != LEX_NOTPARSING)
567 case '\024': /* ^T */
569 sv_setnv(sv, PL_basetime);
571 sv_setiv(sv, (IV)PL_basetime);
574 case '\027': /* ^W */
575 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON));
577 case '1': case '2': case '3': case '4':
578 case '5': case '6': case '7': case '8': case '9': case '&':
579 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
581 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
582 * XXX Does the new way break anything?
584 paren = atoi(mg->mg_ptr);
586 if (paren <= rx->nparens &&
587 (s = rx->startp[paren]) &&
588 (t = rx->endp[paren]))
595 was_tainted = PL_tainted;
600 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
605 sv_setsv(sv,&PL_sv_undef);
608 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
609 paren = rx->lastparen;
613 sv_setsv(sv,&PL_sv_undef);
616 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
617 if ((s = rx->subbeg) && rx->startp[0]) {
618 i = rx->startp[0] - s;
622 sv_setsv(sv,&PL_sv_undef);
625 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
626 if (rx->subend && (s = rx->endp[0])) {
631 sv_setsv(sv,&PL_sv_undef);
635 if (GvIO(PL_last_in_gv)) {
636 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
642 sv_setiv(sv, (IV)STATUS_CURRENT);
643 #ifdef COMPLEX_STATUS
644 LvTARGOFF(sv) = PL_statusvalue;
645 LvTARGLEN(sv) = PL_statusvalue_vms;
650 s = IoTOP_NAME(GvIOp(PL_defoutgv));
654 sv_setpv(sv,GvENAME(PL_defoutgv));
659 s = IoFMT_NAME(GvIOp(PL_defoutgv));
661 s = GvENAME(PL_defoutgv);
666 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
669 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
672 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
680 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
683 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
686 sv_setpvn(sv,PL_ofs,PL_ofslen);
689 sv_setpvn(sv,PL_ors,PL_orslen);
692 sv_setpv(sv,PL_ofmt);
696 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
697 sv_setpv(sv, errno ? Strerror(errno) : "");
700 int saveerrno = errno;
701 sv_setnv(sv, (double)errno);
703 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
706 sv_setpv(sv, errno ? Strerror(errno) : "");
710 SvNOK_on(sv); /* what a wonderful hack! */
713 sv_setiv(sv, (IV)PL_uid);
716 sv_setiv(sv, (IV)PL_euid);
719 sv_setiv(sv, (IV)PL_gid);
720 sv_setpvf(sv, "%Vd", (IV)PL_gid);
723 sv_setiv(sv, (IV)PL_egid);
724 sv_setpvf(sv, "%Vd", (IV)PL_egid);
728 Groups_t gary[NGROUPS];
729 i = getgroups(NGROUPS,gary);
731 sv_catpvf(sv, " %Vd", (IV)gary[i]);
734 SvIOK_on(sv); /* what a wonderful hack! */
742 sv_setsv(sv, thr->errsv);
744 #endif /* USE_THREADS */
750 magic_getuvar(SV *sv, MAGIC *mg)
752 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
754 if (uf && uf->uf_val)
755 (*uf->uf_val)(uf->uf_index, sv);
760 magic_setenv(SV *sv, MAGIC *mg)
771 #ifdef DYNAMIC_ENV_FETCH
772 /* We just undefd an environment var. Is a replacement */
773 /* waiting in the wings? */
776 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
777 s = SvPV(*valp, len);
781 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
782 /* And you'll never guess what the dog had */
783 /* in its mouth... */
785 MgTAINTEDDIR_off(mg);
787 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
788 char pathbuf[256], eltbuf[256], *cp, *elt = s;
792 do { /* DCL$PATH may be a search list */
793 while (1) { /* as may dev portion of any element */
794 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
795 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
796 cando_by_name(S_IWUSR,0,elt) ) {
801 if ((cp = strchr(elt, ':')) != Nullch)
803 if (my_trnlnm(elt, eltbuf, j++))
809 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
812 if (s && klen == 4 && strEQ(ptr,"PATH")) {
813 char *strend = s + len;
818 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
821 if (i >= sizeof tmpbuf /* too long -- assume the worst */
823 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
830 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
836 magic_clearenv(SV *sv, MAGIC *mg)
838 my_setenv(MgPV(mg,PL_na),Nullch);
843 magic_set_all_env(SV *sv, MAGIC *mg)
846 die("Can't make list assignment to %%ENV on this system");
851 magic_clear_all_env(sv,mg);
852 hv_iterinit((HV*)sv);
853 while (entry = hv_iternext((HV*)sv)) {
855 my_setenv(hv_iterkey(entry, &keylen),
856 SvPV(hv_iterval((HV*)sv, entry), PL_na));
864 magic_clear_all_env(SV *sv, MAGIC *mg)
867 die("Can't make list assignment to %%ENV on this system");
870 char *envv = GetEnvironmentStrings();
874 char *end = strchr(cur,'=');
875 if (end && end != cur) {
877 my_setenv(cur,Nullch);
879 cur += strlen(end+1)+1;
881 else if ((len = strlen(cur)))
884 FreeEnvironmentStrings(envv);
888 if (environ == PL_origenviron)
889 New(901, environ, 1, char*);
891 for (i = 0; environ[i]; i++)
892 Safefree(environ[i]);
901 magic_getsig(SV *sv, MAGIC *mg)
904 /* Are we fetching a signal entry? */
905 i = whichsig(MgPV(mg,PL_na));
908 sv_setsv(sv,psig_ptr[i]);
910 Sighandler_t sigstate = rsignal_state(i);
912 /* cache state so we don't fetch it again */
913 if(sigstate == SIG_IGN)
914 sv_setpv(sv,"IGNORE");
916 sv_setsv(sv,&PL_sv_undef);
917 psig_ptr[i] = SvREFCNT_inc(sv);
924 magic_clearsig(SV *sv, MAGIC *mg)
927 /* Are we clearing a signal entry? */
928 i = whichsig(MgPV(mg,PL_na));
931 SvREFCNT_dec(psig_ptr[i]);
935 SvREFCNT_dec(psig_name[i]);
943 magic_setsig(SV *sv, MAGIC *mg)
952 if (strEQ(s,"__DIE__"))
954 else if (strEQ(s,"__WARN__"))
956 else if (strEQ(s,"__PARSE__"))
959 croak("No such hook: %s", s);
967 i = whichsig(s); /* ...no, a brick */
969 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
970 warner(WARN_SIGNAL, "No such signal: SIG%s", s);
973 SvREFCNT_dec(psig_name[i]);
974 SvREFCNT_dec(psig_ptr[i]);
975 psig_ptr[i] = SvREFCNT_inc(sv);
976 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
977 psig_name[i] = newSVpv(s, strlen(s));
978 SvREADONLY_on(psig_name[i]);
980 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
982 (void)rsignal(i, PL_sighandlerp);
984 *svp = SvREFCNT_inc(sv);
987 s = SvPV_force(sv,PL_na);
988 if (strEQ(s,"IGNORE")) {
990 (void)rsignal(i, SIG_IGN);
994 else if (strEQ(s,"DEFAULT") || !*s) {
996 (void)rsignal(i, SIG_DFL);
1002 * We should warn if HINT_STRICT_REFS, but without
1003 * access to a known hint bit in a known OP, we can't
1004 * tell whether HINT_STRICT_REFS is in force or not.
1006 if (!strchr(s,':') && !strchr(s,'\''))
1007 sv_setpv(sv, form("main::%s", s));
1009 (void)rsignal(i, PL_sighandlerp);
1011 *svp = SvREFCNT_inc(sv);
1017 magic_setisa(SV *sv, MAGIC *mg)
1019 PL_sub_generation++;
1026 magic_setamagic(SV *sv, MAGIC *mg)
1028 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1029 PL_amagic_generation++;
1033 #endif /* OVERLOAD */
1036 magic_getnkeys(SV *sv, MAGIC *mg)
1038 HV *hv = (HV*)LvTARG(sv);
1043 (void) hv_iterinit(hv);
1044 if (! SvTIED_mg((SV*)hv, 'P'))
1048 while (entry = hv_iternext(hv)) {
1054 sv_setiv(sv, (IV)i);
1059 magic_setnkeys(SV *sv, MAGIC *mg)
1062 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1067 /* caller is responsible for stack switching/cleanup */
1069 magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1075 PUSHs(SvTIED_obj(sv, mg));
1078 if (mg->mg_len >= 0)
1079 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
1080 else if (mg->mg_len == HEf_SVKEY)
1081 PUSHs((SV*)mg->mg_ptr);
1083 else if (mg->mg_type == 'p') {
1084 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1092 return perl_call_method(meth, flags);
1096 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1102 PUSHSTACKi(PERLSI_MAGIC);
1104 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1105 sv_setsv(sv, *PL_stack_sp--);
1115 magic_getpack(SV *sv, MAGIC *mg)
1117 magic_methpack(sv,mg,"FETCH");
1119 mg->mg_flags |= MGf_GSKIP;
1124 magic_setpack(SV *sv, MAGIC *mg)
1128 PUSHSTACKi(PERLSI_MAGIC);
1129 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1136 magic_clearpack(SV *sv, MAGIC *mg)
1138 return magic_methpack(sv,mg,"DELETE");
1143 magic_sizepack(SV *sv, MAGIC *mg)
1150 PUSHSTACKi(PERLSI_MAGIC);
1151 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1152 sv = *PL_stack_sp--;
1153 retval = (U32) SvIV(sv)-1;
1161 int magic_wipepack(SV *sv, MAGIC *mg)
1166 PUSHSTACKi(PERLSI_MAGIC);
1168 XPUSHs(SvTIED_obj(sv, mg));
1170 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1177 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1180 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1184 PUSHSTACKi(PERLSI_MAGIC);
1187 PUSHs(SvTIED_obj(sv, mg));
1192 if (perl_call_method(meth, G_SCALAR))
1193 sv_setsv(key, *PL_stack_sp--);
1202 magic_existspack(SV *sv, MAGIC *mg)
1204 return magic_methpack(sv,mg,"EXISTS");
1208 magic_setdbline(SV *sv, MAGIC *mg)
1218 svp = av_fetch(GvAV(gv),
1219 atoi(MgPV(mg,PL_na)), FALSE);
1220 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1223 warn("Can't break at that line\n");
1228 magic_getarylen(SV *sv, MAGIC *mg)
1231 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1236 magic_setarylen(SV *sv, MAGIC *mg)
1239 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1244 magic_getpos(SV *sv, MAGIC *mg)
1246 SV* lsv = LvTARG(sv);
1248 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1249 mg = mg_find(lsv, 'g');
1250 if (mg && mg->mg_len >= 0) {
1254 sv_pos_b2u(lsv, &i);
1255 sv_setiv(sv, i + PL_curcop->cop_arybase);
1264 magic_setpos(SV *sv, MAGIC *mg)
1266 SV* lsv = LvTARG(sv);
1274 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1275 mg = mg_find(lsv, 'g');
1279 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1280 mg = mg_find(lsv, 'g');
1282 else if (!SvOK(sv)) {
1286 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1288 pos = SvIV(sv) - PL_curcop->cop_arybase;
1291 ulen = sv_len_utf8(lsv);
1308 sv_pos_u2b(lsv, &p, 0);
1313 mg->mg_flags &= ~MGf_MINMATCH;
1319 magic_getglob(SV *sv, MAGIC *mg)
1321 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1323 gv_efullname3(sv,((GV*)sv), "*");
1327 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1332 magic_setglob(SV *sv, MAGIC *mg)
1339 s = SvPV(sv, PL_na);
1340 if (*s == '*' && s[1])
1342 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1347 GvGP(sv) = gp_ref(GvGP(gv));
1352 magic_getsubstr(SV *sv, MAGIC *mg)
1355 SV *lsv = LvTARG(sv);
1356 char *tmps = SvPV(lsv,len);
1357 I32 offs = LvTARGOFF(sv);
1358 I32 rem = LvTARGLEN(sv);
1362 if (rem + offs > len)
1364 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1369 magic_setsubstr(SV *sv, MAGIC *mg)
1372 char *tmps = SvPV(sv,len);
1373 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1378 magic_gettaint(SV *sv, MAGIC *mg)
1381 TAINT_IF((mg->mg_len & 1) ||
1382 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1387 magic_settaint(SV *sv, MAGIC *mg)
1390 if (PL_localizing) {
1391 if (PL_localizing == 1)
1396 else if (PL_tainted)
1404 magic_getvec(SV *sv, MAGIC *mg)
1406 SV *lsv = LvTARG(sv);
1408 unsigned long retnum;
1418 s = (unsigned char *) SvPV(lsv, lsvlen);
1419 offset = LvTARGOFF(sv);
1420 size = LvTARGLEN(sv);
1421 len = (offset + size + 7) / 8;
1423 /* Copied from pp_vec() */
1431 if (offset >= lsvlen)
1434 retnum = (unsigned long) s[offset] << 8;
1436 else if (size == 32) {
1437 if (offset >= lsvlen)
1439 else if (offset + 1 >= lsvlen)
1440 retnum = (unsigned long) s[offset] << 24;
1441 else if (offset + 2 >= lsvlen)
1442 retnum = ((unsigned long) s[offset] << 24) +
1443 ((unsigned long) s[offset + 1] << 16);
1445 retnum = ((unsigned long) s[offset] << 24) +
1446 ((unsigned long) s[offset + 1] << 16) +
1447 (s[offset + 2] << 8);
1452 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1457 else if (size == 16)
1458 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1459 else if (size == 32)
1460 retnum = ((unsigned long) s[offset] << 24) +
1461 ((unsigned long) s[offset + 1] << 16) +
1462 (s[offset + 2] << 8) + s[offset+3];
1465 sv_setuv(sv, (UV)retnum);
1470 magic_setvec(SV *sv, MAGIC *mg)
1472 do_vecset(sv); /* XXX slurp this routine */
1477 magic_getdefelem(SV *sv, MAGIC *mg)
1480 if (LvTARGLEN(sv)) {
1482 SV *ahv = LvTARG(sv);
1483 if (SvTYPE(ahv) == SVt_PVHV) {
1484 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1489 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1495 AV* av = (AV*)LvTARG(sv);
1496 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1497 targ = AvARRAY(av)[LvTARGOFF(sv)];
1499 if (targ && targ != &PL_sv_undef) {
1500 dTHR; /* just for SvREFCNT_dec */
1501 /* somebody else defined it for us */
1502 SvREFCNT_dec(LvTARG(sv));
1503 LvTARG(sv) = SvREFCNT_inc(targ);
1505 SvREFCNT_dec(mg->mg_obj);
1506 mg->mg_obj = Nullsv;
1507 mg->mg_flags &= ~MGf_REFCOUNTED;
1512 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1517 magic_setdefelem(SV *sv, MAGIC *mg)
1522 sv_setsv(LvTARG(sv), sv);
1523 SvSETMAGIC(LvTARG(sv));
1529 vivify_defelem(SV *sv)
1531 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1535 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1538 SV *ahv = LvTARG(sv);
1539 if (SvTYPE(ahv) == SVt_PVHV) {
1540 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1545 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1549 if (!value || value == &PL_sv_undef)
1550 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1553 AV* av = (AV*)LvTARG(sv);
1554 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1555 LvTARG(sv) = Nullsv; /* array can't be extended */
1557 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1558 if (!svp || (value = *svp) == &PL_sv_undef)
1559 croak(no_aelem, (I32)LvTARGOFF(sv));
1562 (void)SvREFCNT_inc(value);
1563 SvREFCNT_dec(LvTARG(sv));
1566 SvREFCNT_dec(mg->mg_obj);
1567 mg->mg_obj = Nullsv;
1568 mg->mg_flags &= ~MGf_REFCOUNTED;
1572 magic_setmglob(SV *sv, MAGIC *mg)
1580 magic_setbm(SV *sv, MAGIC *mg)
1582 sv_unmagic(sv, 'B');
1588 magic_setfm(SV *sv, MAGIC *mg)
1590 sv_unmagic(sv, 'f');
1596 magic_setuvar(SV *sv, MAGIC *mg)
1598 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1600 if (uf && uf->uf_set)
1601 (*uf->uf_set)(uf->uf_index, sv);
1606 magic_freeregexp(SV *sv, MAGIC *mg)
1608 regexp *re = (regexp *)mg->mg_obj;
1613 #ifdef USE_LOCALE_COLLATE
1615 magic_setcollxfrm(SV *sv, MAGIC *mg)
1618 * RenE<eacute> Descartes said "I think not."
1619 * and vanished with a faint plop.
1622 Safefree(mg->mg_ptr);
1628 #endif /* USE_LOCALE_COLLATE */
1631 magic_set(SV *sv, MAGIC *mg)
1637 switch (*mg->mg_ptr) {
1638 case '\001': /* ^A */
1639 sv_setsv(PL_bodytarget, sv);
1641 case '\002': /* ^B */
1642 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1643 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize))
1644 PL_compiling.cop_warnings = WARN_ALL;
1645 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1646 PL_compiling.cop_warnings = WARN_NONE;
1648 if (PL_compiling.cop_warnings != WARN_NONE &&
1649 PL_compiling.cop_warnings != WARN_ALL)
1650 sv_setsv(PL_compiling.cop_warnings, sv);
1652 PL_compiling.cop_warnings = newSVsv(sv) ;
1656 case '\004': /* ^D */
1657 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1658 DEBUG_x(dump_all());
1660 case '\005': /* ^E */
1662 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1665 SetLastError( SvIV(sv) );
1667 /* will anyone ever use this? */
1668 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1672 case '\006': /* ^F */
1673 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1675 case '\010': /* ^H */
1676 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1678 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1680 Safefree(PL_inplace);
1682 PL_inplace = savepv(SvPV(sv,PL_na));
1684 PL_inplace = Nullch;
1686 case '\017': /* ^O */
1688 Safefree(PL_osname);
1690 PL_osname = savepv(SvPV(sv,PL_na));
1694 case '\020': /* ^P */
1695 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1697 case '\024': /* ^T */
1699 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1701 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1704 case '\027': /* ^W */
1705 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1706 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1707 PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ;
1711 if (PL_localizing) {
1712 if (PL_localizing == 1)
1713 save_sptr((SV**)&PL_last_in_gv);
1715 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1716 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1719 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1720 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1721 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1724 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1725 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1726 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1729 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1732 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1733 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1734 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1737 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1741 IO *io = GvIOp(PL_defoutgv);
1742 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1743 IoFLAGS(io) &= ~IOf_FLUSH;
1745 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1746 PerlIO *ofp = IoOFP(io);
1748 (void)PerlIO_flush(ofp);
1749 IoFLAGS(io) |= IOf_FLUSH;
1755 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1756 PL_multiline = (i != 0);
1759 SvREFCNT_dec(PL_nrs);
1760 PL_nrs = newSVsv(sv);
1761 SvREFCNT_dec(PL_rs);
1762 PL_rs = SvREFCNT_inc(PL_nrs);
1767 if (SvOK(sv) || SvGMAGICAL(sv))
1768 PL_ors = savepv(SvPV(sv,PL_orslen));
1777 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1782 PL_ofmt = savepv(SvPV(sv,PL_na));
1785 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1788 #ifdef COMPLEX_STATUS
1789 if (PL_localizing == 2) {
1790 PL_statusvalue = LvTARGOFF(sv);
1791 PL_statusvalue_vms = LvTARGLEN(sv);
1795 #ifdef VMSISH_STATUS
1797 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1800 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1803 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1804 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1807 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1808 if (PL_delaymagic) {
1809 PL_delaymagic |= DM_RUID;
1810 break; /* don't do magic till later */
1813 (void)setruid((Uid_t)PL_uid);
1816 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1818 #ifdef HAS_SETRESUID
1819 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1821 if (PL_uid == PL_euid) /* special case $< = $> */
1822 (void)PerlProc_setuid(PL_uid);
1824 PL_uid = (I32)PerlProc_getuid();
1825 croak("setruid() not implemented");
1830 PL_uid = (I32)PerlProc_getuid();
1831 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1834 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1835 if (PL_delaymagic) {
1836 PL_delaymagic |= DM_EUID;
1837 break; /* don't do magic till later */
1840 (void)seteuid((Uid_t)PL_euid);
1843 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1845 #ifdef HAS_SETRESUID
1846 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1848 if (PL_euid == PL_uid) /* special case $> = $< */
1849 PerlProc_setuid(PL_euid);
1851 PL_euid = (I32)PerlProc_geteuid();
1852 croak("seteuid() not implemented");
1857 PL_euid = (I32)PerlProc_geteuid();
1858 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1861 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1862 if (PL_delaymagic) {
1863 PL_delaymagic |= DM_RGID;
1864 break; /* don't do magic till later */
1867 (void)setrgid((Gid_t)PL_gid);
1870 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1872 #ifdef HAS_SETRESGID
1873 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1875 if (PL_gid == PL_egid) /* special case $( = $) */
1876 (void)PerlProc_setgid(PL_gid);
1878 PL_gid = (I32)PerlProc_getgid();
1879 croak("setrgid() not implemented");
1884 PL_gid = (I32)PerlProc_getgid();
1885 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1888 #ifdef HAS_SETGROUPS
1890 char *p = SvPV(sv, PL_na);
1891 Groups_t gary[NGROUPS];
1893 SET_NUMERIC_STANDARD();
1896 PL_egid = I_V(atof(p));
1897 for (i = 0; i < NGROUPS; ++i) {
1898 while (*p && !isSPACE(*p))
1904 gary[i] = I_V(atof(p));
1907 (void)setgroups(i, gary);
1909 #else /* HAS_SETGROUPS */
1910 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1911 #endif /* HAS_SETGROUPS */
1912 if (PL_delaymagic) {
1913 PL_delaymagic |= DM_EGID;
1914 break; /* don't do magic till later */
1917 (void)setegid((Gid_t)PL_egid);
1920 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1922 #ifdef HAS_SETRESGID
1923 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1925 if (PL_egid == PL_gid) /* special case $) = $( */
1926 (void)PerlProc_setgid(PL_egid);
1928 PL_egid = (I32)PerlProc_getegid();
1929 croak("setegid() not implemented");
1934 PL_egid = (I32)PerlProc_getegid();
1935 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1938 PL_chopset = SvPV_force(sv,PL_na);
1944 /* See if all the arguments are contiguous in memory */
1945 for (i = 1; i < PL_origargc; i++) {
1946 if (PL_origargv[i] == s + 1
1948 || PL_origargv[i] == s + 2
1951 s += strlen(++s); /* this one is ok too */
1955 /* can grab env area too? */
1956 if (PL_origenviron && (PL_origenviron[0] == s + 1
1958 || (PL_origenviron[0] == s + 9 && (s += 8))
1961 my_setenv("NoNe SuCh", Nullch);
1962 /* force copy of environment */
1963 for (i = 0; PL_origenviron[i]; i++)
1964 if (PL_origenviron[i] == s + 1)
1969 PL_origalen = s - PL_origargv[0];
1971 s = SvPV_force(sv,len);
1973 if (i >= PL_origalen) {
1975 /* don't allow system to limit $0 seen by script */
1976 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1977 Copy(s, PL_origargv[0], i, char);
1978 s = PL_origargv[0]+i;
1982 Copy(s, PL_origargv[0], i, char);
1983 s = PL_origargv[0]+i;
1985 while (++i < PL_origalen)
1987 s = PL_origargv[0]+i;
1988 for (i = 1; i < PL_origargc; i++)
1989 PL_origargv[i] = Nullch;
1994 sv_setsv(thr->errsv, sv);
1996 #endif /* USE_THREADS */
2003 magic_mutexfree(SV *sv, MAGIC *mg)
2006 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
2007 (unsigned long)thr, (unsigned long)sv);)
2009 croak("panic: magic_mutexfree");
2010 MUTEX_DESTROY(MgMUTEXP(mg));
2011 COND_DESTROY(MgCONDP(mg));
2014 #endif /* USE_THREADS */
2019 register char **sigv;
2021 for (sigv = sig_name+1; *sigv; sigv++)
2022 if (strEQ(sig,*sigv))
2023 return sig_num[sigv - sig_name];
2025 if (strEQ(sig,"CHLD"))
2029 if (strEQ(sig,"CLD"))
2038 unwind_handler_stack(void *p)
2041 U32 flags = *(U32*)p;
2044 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2045 /* cxstack_ix-- Not needed, die already unwound it. */
2047 SvREFCNT_dec(sig_sv);
2056 SV *sv, *tSv = PL_Sv;
2060 I32 o_save_i = PL_savestack_ix, type;
2063 if (PL_savestack_ix + 15 <= PL_savestack_max)
2065 if (PL_markstack_ptr < PL_markstack_max - 2)
2067 if (PL_retstack_ix < PL_retstack_max - 2)
2069 if (PL_scopestack_ix < PL_scopestack_max - 3)
2073 die("Signal SIG%s received, but no signal handler set.\n",
2076 /* Max number of items pushed there is 3*n or 4. We cannot fix
2077 infinity, so we fix 4 (in fact 5): */
2079 PL_savestack_ix += 5; /* Protect save in progress. */
2080 o_save_i = PL_savestack_ix;
2081 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
2084 PL_markstack_ptr++; /* Protect mark. */
2087 PL_retstack[PL_retstack_ix] = NULL;
2090 PL_scopestack_ix += 1;
2091 /* sv_2cv is too complicated, try a simpler variant first: */
2092 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
2093 || SvTYPE(cv) != SVt_PVCV)
2094 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
2096 if (!cv || !CvROOT(cv)) {
2097 if (ckWARN(WARN_SIGNAL))
2098 warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2099 sig_name[sig], (gv ? GvENAME(gv)
2106 if(psig_name[sig]) {
2107 sv = SvREFCNT_inc(psig_name[sig]);
2111 sv = sv_newmortal();
2112 sv_setpv(sv,sig_name[sig]);
2115 PUSHSTACKi(PERLSI_SIGNAL);
2120 perl_call_sv((SV*)cv, G_DISCARD);
2125 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2131 PL_scopestack_ix -= 1;
2134 PL_op = myop; /* Apparently not needed... */
2136 PL_Sv = tSv; /* Restore global temporaries. */