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 assert(SSPOPINT == SAVEt_DESTRUCTOR);
99 assert(SSPOPINT == SAVEt_ALLOC);
100 PL_savestack_ix -= SSPOPINT;
109 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
110 MGVTBL* vtbl = mg->mg_virtual;
112 if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP))
116 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL))
131 mgs_ix = SSNEW(sizeof(MGS));
132 save_magic(mgs_ix, sv);
135 while ((mg = *mgp) != 0) {
136 MGVTBL* vtbl = mg->mg_virtual;
137 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) {
138 (VTBL->svt_get)(sv, mg);
139 /* Ignore this magic if it's been deleted */
140 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
141 (mg->mg_flags & MGf_GSKIP))
142 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
144 /* Advance to next magic (complicated by possible deletion) */
145 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
146 mgp = &mg->mg_moremagic;
150 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
153 restore_magic((void*)mgs_ix);
165 mgs_ix = SSNEW(sizeof(MGS));
166 save_magic(mgs_ix, sv);
168 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
169 MGVTBL* vtbl = mg->mg_virtual;
170 nextmg = mg->mg_moremagic; /* it may delete itself */
171 if (mg->mg_flags & MGf_GSKIP) {
172 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
173 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
175 if (vtbl && (vtbl->svt_set != NULL))
176 (VTBL->svt_set)(sv, mg);
179 restore_magic((void*)mgs_ix);
190 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
191 MGVTBL* vtbl = mg->mg_virtual;
192 if (vtbl && (vtbl->svt_len != NULL)) {
195 mgs_ix = SSNEW(sizeof(MGS));
196 save_magic(mgs_ix, sv);
197 /* omit MGf_GSKIP -- not changed here */
198 len = (VTBL->svt_len)(sv, mg);
199 restore_magic((void*)mgs_ix);
204 junk = SvPV(sv, len);
214 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
215 MGVTBL* vtbl = mg->mg_virtual;
216 if (vtbl && (vtbl->svt_len != NULL)) {
219 mgs_ix = SSNEW(sizeof(MGS));
220 save_magic(mgs_ix, sv);
221 /* omit MGf_GSKIP -- not changed here */
222 len = (VTBL->svt_len)(sv, mg);
223 restore_magic((void*)mgs_ix);
230 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
235 croak("Size magic not implemented");
247 mgs_ix = SSNEW(sizeof(MGS));
248 save_magic(mgs_ix, sv);
250 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
251 MGVTBL* vtbl = mg->mg_virtual;
252 /* omit GSKIP -- never set here */
254 if (vtbl && (vtbl->svt_clear != NULL))
255 (VTBL->svt_clear)(sv, mg);
258 restore_magic((void*)mgs_ix);
263 mg_find(SV *sv, int type)
266 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
267 if (mg->mg_type == type)
274 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
278 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
279 if (isUPPER(mg->mg_type)) {
280 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
292 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
293 MGVTBL* vtbl = mg->mg_virtual;
294 moremagic = mg->mg_moremagic;
295 if (vtbl && (vtbl->svt_free != NULL))
296 (VTBL->svt_free)(sv, mg);
297 if (mg->mg_ptr && mg->mg_type != 'g')
299 Safefree(mg->mg_ptr);
300 else if (mg->mg_len == HEf_SVKEY)
301 SvREFCNT_dec((SV*)mg->mg_ptr);
302 if (mg->mg_flags & MGf_REFCOUNTED)
303 SvREFCNT_dec(mg->mg_obj);
310 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
315 magic_regdata_cnt(SV *sv, MAGIC *mg)
323 if (PL_curpm && (rx = PL_curpm->op_pmregexp))
324 return rx->lastparen;
329 magic_regdatum_get(SV *sv, MAGIC *mg)
338 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
342 if (paren <= rx->nparens &&
343 (s = rx->startp[paren]) &&
344 (t = rx->endp[paren]))
346 if (mg->mg_obj) /* @+ */
357 magic_len(SV *sv, MAGIC *mg)
366 switch (*mg->mg_ptr) {
367 case '1': case '2': case '3': case '4':
368 case '5': case '6': case '7': case '8': case '9': case '&':
369 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
370 paren = atoi(mg->mg_ptr);
372 if (paren <= rx->nparens &&
373 (s = rx->startp[paren]) &&
374 (t = rx->endp[paren]))
383 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
384 paren = rx->lastparen;
390 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
391 if ((s = rx->subbeg) && rx->startp[0]) {
392 i = rx->startp[0] - s;
399 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
400 if (rx->subend && (s = rx->endp[0])) {
408 return (STRLEN)PL_ofslen;
410 return (STRLEN)PL_orslen;
413 if (!SvPOK(sv) && SvNIOK(sv))
430 static char buffer[50] ;
435 sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ;
437 for (i = 0; i < SvCUR(sv) ; ++ i) {
438 sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ;
439 strcat(buffer, buf1) ;
449 magic_get(SV *sv, MAGIC *mg)
458 switch (*mg->mg_ptr) {
459 case '\001': /* ^A */
460 sv_setsv(sv, PL_bodytarget);
462 case '\002': /* ^B */
463 /* printf("magic_get $^B: ") ; */
464 if (curcop->cop_warnings == WARN_NONE)
465 /* printf("WARN_NONE\n"), */
466 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
467 else if (curcop->cop_warnings == WARN_ALL)
468 /* printf("WARN_ALL\n"), */
469 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
471 /* printf("some %s\n", printW(curcop->cop_warnings)), */
472 sv_setsv(sv, curcop->cop_warnings);
474 case '\004': /* ^D */
475 sv_setiv(sv, (IV)(PL_debug & 32767));
477 case '\005': /* ^E */
480 # include <descrip.h>
481 # include <starlet.h>
483 $DESCRIPTOR(msgdsc,msg);
484 sv_setnv(sv,(double) vaxc$errno);
485 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
486 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
492 if (!(_emx_env & 0x200)) { /* Under DOS */
493 sv_setnv(sv, (double)errno);
494 sv_setpv(sv, errno ? Strerror(errno) : "");
496 if (errno != errno_isOS2)
497 Perl_rc = _syserrno();
498 sv_setnv(sv, (double)Perl_rc);
499 sv_setpv(sv, os2error(Perl_rc));
504 DWORD dwErr = GetLastError();
505 sv_setnv(sv, (double)dwErr);
511 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
512 sv_setpvn(sv, sMsg, dwLen);
513 PerlProc_FreeBuf(sMsg);
515 win32_str_os_error(sv, dwErr);
523 sv_setnv(sv, (double)errno);
524 sv_setpv(sv, errno ? Strerror(errno) : "");
528 SvNOK_on(sv); /* what a wonderful hack! */
530 case '\006': /* ^F */
531 sv_setiv(sv, (IV)PL_maxsysfd);
533 case '\010': /* ^H */
534 sv_setiv(sv, (IV)PL_hints);
536 case '\011': /* ^I */ /* NOT \t in EBCDIC */
538 sv_setpv(sv, PL_inplace);
540 sv_setsv(sv, &PL_sv_undef);
542 case '\017': /* ^O */
543 sv_setpv(sv, PL_osname);
545 case '\020': /* ^P */
546 sv_setiv(sv, (IV)PL_perldb);
548 case '\023': /* ^S */
551 if (PL_lex_state != LEX_NOTPARSING)
559 case '\024': /* ^T */
561 sv_setnv(sv, PL_basetime);
563 sv_setiv(sv, (IV)PL_basetime);
566 case '\027': /* ^W */
567 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON));
569 case '1': case '2': case '3': case '4':
570 case '5': case '6': case '7': case '8': case '9': case '&':
571 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
573 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
574 * XXX Does the new way break anything?
576 paren = atoi(mg->mg_ptr);
578 if (paren <= rx->nparens &&
579 (s = rx->startp[paren]) &&
580 (t = rx->endp[paren]))
587 was_tainted = PL_tainted;
592 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
597 sv_setsv(sv,&PL_sv_undef);
600 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
601 paren = rx->lastparen;
605 sv_setsv(sv,&PL_sv_undef);
608 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
609 if ((s = rx->subbeg) && rx->startp[0]) {
610 i = rx->startp[0] - s;
614 sv_setsv(sv,&PL_sv_undef);
617 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
618 if (rx->subend && (s = rx->endp[0])) {
623 sv_setsv(sv,&PL_sv_undef);
627 if (GvIO(PL_last_in_gv)) {
628 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
634 sv_setiv(sv, (IV)STATUS_CURRENT);
635 #ifdef COMPLEX_STATUS
636 LvTARGOFF(sv) = PL_statusvalue;
637 LvTARGLEN(sv) = PL_statusvalue_vms;
642 s = IoTOP_NAME(GvIOp(PL_defoutgv));
646 sv_setpv(sv,GvENAME(PL_defoutgv));
651 s = IoFMT_NAME(GvIOp(PL_defoutgv));
653 s = GvENAME(PL_defoutgv);
658 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
661 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
664 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
672 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
675 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
678 sv_setpvn(sv,PL_ofs,PL_ofslen);
681 sv_setpvn(sv,PL_ors,PL_orslen);
684 sv_setpv(sv,PL_ofmt);
688 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
689 sv_setpv(sv, errno ? Strerror(errno) : "");
692 int saveerrno = errno;
693 sv_setnv(sv, (double)errno);
695 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
698 sv_setpv(sv, errno ? Strerror(errno) : "");
702 SvNOK_on(sv); /* what a wonderful hack! */
705 sv_setiv(sv, (IV)PL_uid);
708 sv_setiv(sv, (IV)PL_euid);
711 sv_setiv(sv, (IV)PL_gid);
712 sv_setpvf(sv, "%Vd", (IV)PL_gid);
715 sv_setiv(sv, (IV)PL_egid);
716 sv_setpvf(sv, "%Vd", (IV)PL_egid);
720 Groups_t gary[NGROUPS];
721 i = getgroups(NGROUPS,gary);
723 sv_catpvf(sv, " %Vd", (IV)gary[i]);
726 SvIOK_on(sv); /* what a wonderful hack! */
734 sv_setsv(sv, thr->errsv);
736 #endif /* USE_THREADS */
742 magic_getuvar(SV *sv, MAGIC *mg)
744 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
746 if (uf && uf->uf_val)
747 (*uf->uf_val)(uf->uf_index, sv);
752 magic_setenv(SV *sv, MAGIC *mg)
763 #ifdef DYNAMIC_ENV_FETCH
764 /* We just undefd an environment var. Is a replacement */
765 /* waiting in the wings? */
768 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
769 s = SvPV(*valp, len);
773 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
774 /* And you'll never guess what the dog had */
775 /* in its mouth... */
777 MgTAINTEDDIR_off(mg);
779 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
780 char pathbuf[256], eltbuf[256], *cp, *elt = s;
784 do { /* DCL$PATH may be a search list */
785 while (1) { /* as may dev portion of any element */
786 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
787 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
788 cando_by_name(S_IWUSR,0,elt) ) {
793 if ((cp = strchr(elt, ':')) != Nullch)
795 if (my_trnlnm(elt, eltbuf, j++))
801 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
804 if (s && klen == 4 && strEQ(ptr,"PATH")) {
805 char *strend = s + len;
810 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
813 if (i >= sizeof tmpbuf /* too long -- assume the worst */
815 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
822 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
828 magic_clearenv(SV *sv, MAGIC *mg)
830 my_setenv(MgPV(mg,PL_na),Nullch);
835 magic_set_all_env(SV *sv, MAGIC *mg)
838 die("Can't make list assignment to %%ENV on this system");
843 magic_clear_all_env(sv,mg);
844 hv_iterinit((HV*)sv);
845 while (entry = hv_iternext((HV*)sv)) {
847 my_setenv(hv_iterkey(entry, &keylen),
848 SvPV(hv_iterval((HV*)sv, entry), PL_na));
856 magic_clear_all_env(SV *sv, MAGIC *mg)
859 die("Can't make list assignment to %%ENV on this system");
862 char *envv = GetEnvironmentStrings();
866 char *end = strchr(cur,'=');
867 if (end && end != cur) {
869 my_setenv(cur,Nullch);
871 cur += strlen(end+1)+1;
873 else if ((len = strlen(cur)))
876 FreeEnvironmentStrings(envv);
880 if (environ == PL_origenviron)
881 New(901, environ, 1, char*);
883 for (i = 0; environ[i]; i++)
884 Safefree(environ[i]);
893 magic_getsig(SV *sv, MAGIC *mg)
896 /* Are we fetching a signal entry? */
897 i = whichsig(MgPV(mg,PL_na));
900 sv_setsv(sv,psig_ptr[i]);
902 Sighandler_t sigstate = rsignal_state(i);
904 /* cache state so we don't fetch it again */
905 if(sigstate == SIG_IGN)
906 sv_setpv(sv,"IGNORE");
908 sv_setsv(sv,&PL_sv_undef);
909 psig_ptr[i] = SvREFCNT_inc(sv);
916 magic_clearsig(SV *sv, MAGIC *mg)
919 /* Are we clearing a signal entry? */
920 i = whichsig(MgPV(mg,PL_na));
923 SvREFCNT_dec(psig_ptr[i]);
927 SvREFCNT_dec(psig_name[i]);
935 magic_setsig(SV *sv, MAGIC *mg)
944 if (strEQ(s,"__DIE__"))
946 else if (strEQ(s,"__WARN__"))
948 else if (strEQ(s,"__PARSE__"))
951 croak("No such hook: %s", s);
959 i = whichsig(s); /* ...no, a brick */
961 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
962 warner(WARN_SIGNAL, "No such signal: SIG%s", s);
965 SvREFCNT_dec(psig_name[i]);
966 SvREFCNT_dec(psig_ptr[i]);
967 psig_ptr[i] = SvREFCNT_inc(sv);
968 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
969 psig_name[i] = newSVpv(s, strlen(s));
970 SvREADONLY_on(psig_name[i]);
972 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
974 (void)rsignal(i, PL_sighandlerp);
976 *svp = SvREFCNT_inc(sv);
979 s = SvPV_force(sv,PL_na);
980 if (strEQ(s,"IGNORE")) {
982 (void)rsignal(i, SIG_IGN);
986 else if (strEQ(s,"DEFAULT") || !*s) {
988 (void)rsignal(i, SIG_DFL);
994 * We should warn if HINT_STRICT_REFS, but without
995 * access to a known hint bit in a known OP, we can't
996 * tell whether HINT_STRICT_REFS is in force or not.
998 if (!strchr(s,':') && !strchr(s,'\''))
999 sv_setpv(sv, form("main::%s", s));
1001 (void)rsignal(i, PL_sighandlerp);
1003 *svp = SvREFCNT_inc(sv);
1009 magic_setisa(SV *sv, MAGIC *mg)
1011 PL_sub_generation++;
1018 magic_setamagic(SV *sv, MAGIC *mg)
1020 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1021 PL_amagic_generation++;
1025 #endif /* OVERLOAD */
1028 magic_getnkeys(SV *sv, MAGIC *mg)
1030 HV *hv = (HV*)LvTARG(sv);
1035 (void) hv_iterinit(hv);
1036 if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
1040 while (entry = hv_iternext(hv)) {
1046 sv_setiv(sv, (IV)i);
1051 magic_setnkeys(SV *sv, MAGIC *mg)
1054 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1059 /* caller is responsible for stack switching/cleanup */
1061 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1070 if (mg->mg_len >= 0)
1071 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
1072 else if (mg->mg_len == HEf_SVKEY)
1073 PUSHs((SV*)mg->mg_ptr);
1075 else if (mg->mg_type == 'p') {
1076 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1084 return perl_call_method(meth, flags);
1088 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1094 PUSHSTACKi(PERLSI_MAGIC);
1096 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
1097 sv_setsv(sv, *PL_stack_sp--);
1107 magic_getpack(SV *sv, MAGIC *mg)
1109 magic_methpack(sv,mg,"FETCH");
1111 mg->mg_flags |= MGf_GSKIP;
1116 magic_setpack(SV *sv, MAGIC *mg)
1120 PUSHSTACKi(PERLSI_MAGIC);
1121 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1128 magic_clearpack(SV *sv, MAGIC *mg)
1130 return magic_methpack(sv,mg,"DELETE");
1135 magic_sizepack(SV *sv, MAGIC *mg)
1142 PUSHSTACKi(PERLSI_MAGIC);
1143 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1144 sv = *PL_stack_sp--;
1145 retval = (U32) SvIV(sv)-1;
1153 int magic_wipepack(SV *sv, MAGIC *mg)
1158 PUSHSTACKi(PERLSI_MAGIC);
1162 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1169 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1172 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1176 PUSHSTACKi(PERLSI_MAGIC);
1184 if (perl_call_method(meth, G_SCALAR))
1185 sv_setsv(key, *PL_stack_sp--);
1194 magic_existspack(SV *sv, MAGIC *mg)
1196 return magic_methpack(sv,mg,"EXISTS");
1200 magic_setdbline(SV *sv, MAGIC *mg)
1210 svp = av_fetch(GvAV(gv),
1211 atoi(MgPV(mg,PL_na)), FALSE);
1212 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1215 warn("Can't break at that line\n");
1220 magic_getarylen(SV *sv, MAGIC *mg)
1223 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1228 magic_setarylen(SV *sv, MAGIC *mg)
1231 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1236 magic_getpos(SV *sv, MAGIC *mg)
1238 SV* lsv = LvTARG(sv);
1240 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1241 mg = mg_find(lsv, 'g');
1242 if (mg && mg->mg_len >= 0) {
1246 sv_pos_b2u(lsv, &i);
1247 sv_setiv(sv, i + PL_curcop->cop_arybase);
1256 magic_setpos(SV *sv, MAGIC *mg)
1258 SV* lsv = LvTARG(sv);
1266 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1267 mg = mg_find(lsv, 'g');
1271 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1272 mg = mg_find(lsv, 'g');
1274 else if (!SvOK(sv)) {
1278 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1280 pos = SvIV(sv) - PL_curcop->cop_arybase;
1283 ulen = sv_len_utf8(lsv);
1300 sv_pos_u2b(lsv, &p, 0);
1305 mg->mg_flags &= ~MGf_MINMATCH;
1311 magic_getglob(SV *sv, MAGIC *mg)
1313 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1315 gv_efullname3(sv,((GV*)sv), "*");
1319 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1324 magic_setglob(SV *sv, MAGIC *mg)
1331 s = SvPV(sv, PL_na);
1332 if (*s == '*' && s[1])
1334 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1339 GvGP(sv) = gp_ref(GvGP(gv));
1344 magic_getsubstr(SV *sv, MAGIC *mg)
1347 SV *lsv = LvTARG(sv);
1348 char *tmps = SvPV(lsv,len);
1349 I32 offs = LvTARGOFF(sv);
1350 I32 rem = LvTARGLEN(sv);
1354 if (rem + offs > len)
1356 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1361 magic_setsubstr(SV *sv, MAGIC *mg)
1364 char *tmps = SvPV(sv,len);
1365 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1370 magic_gettaint(SV *sv, MAGIC *mg)
1373 TAINT_IF((mg->mg_len & 1) ||
1374 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1379 magic_settaint(SV *sv, MAGIC *mg)
1382 if (PL_localizing) {
1383 if (PL_localizing == 1)
1388 else if (PL_tainted)
1396 magic_getvec(SV *sv, MAGIC *mg)
1398 SV *lsv = LvTARG(sv);
1400 unsigned long retnum;
1410 s = (unsigned char *) SvPV(lsv, lsvlen);
1411 offset = LvTARGOFF(sv);
1412 size = LvTARGLEN(sv);
1413 len = (offset + size + 7) / 8;
1415 /* Copied from pp_vec() */
1423 if (offset >= lsvlen)
1426 retnum = (unsigned long) s[offset] << 8;
1428 else if (size == 32) {
1429 if (offset >= lsvlen)
1431 else if (offset + 1 >= lsvlen)
1432 retnum = (unsigned long) s[offset] << 24;
1433 else if (offset + 2 >= lsvlen)
1434 retnum = ((unsigned long) s[offset] << 24) +
1435 ((unsigned long) s[offset + 1] << 16);
1437 retnum = ((unsigned long) s[offset] << 24) +
1438 ((unsigned long) s[offset + 1] << 16) +
1439 (s[offset + 2] << 8);
1444 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1449 else if (size == 16)
1450 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1451 else if (size == 32)
1452 retnum = ((unsigned long) s[offset] << 24) +
1453 ((unsigned long) s[offset + 1] << 16) +
1454 (s[offset + 2] << 8) + s[offset+3];
1457 sv_setuv(sv, (UV)retnum);
1462 magic_setvec(SV *sv, MAGIC *mg)
1464 do_vecset(sv); /* XXX slurp this routine */
1469 magic_getdefelem(SV *sv, MAGIC *mg)
1472 if (LvTARGLEN(sv)) {
1474 SV *ahv = LvTARG(sv);
1475 if (SvTYPE(ahv) == SVt_PVHV) {
1476 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1481 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1487 AV* av = (AV*)LvTARG(sv);
1488 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1489 targ = AvARRAY(av)[LvTARGOFF(sv)];
1491 if (targ && targ != &PL_sv_undef) {
1492 dTHR; /* just for SvREFCNT_dec */
1493 /* somebody else defined it for us */
1494 SvREFCNT_dec(LvTARG(sv));
1495 LvTARG(sv) = SvREFCNT_inc(targ);
1497 SvREFCNT_dec(mg->mg_obj);
1498 mg->mg_obj = Nullsv;
1499 mg->mg_flags &= ~MGf_REFCOUNTED;
1504 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1509 magic_setdefelem(SV *sv, MAGIC *mg)
1514 sv_setsv(LvTARG(sv), sv);
1515 SvSETMAGIC(LvTARG(sv));
1521 vivify_defelem(SV *sv)
1523 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1527 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1530 SV *ahv = LvTARG(sv);
1531 if (SvTYPE(ahv) == SVt_PVHV) {
1532 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1537 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1541 if (!value || value == &PL_sv_undef)
1542 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1545 AV* av = (AV*)LvTARG(sv);
1546 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1547 LvTARG(sv) = Nullsv; /* array can't be extended */
1549 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1550 if (!svp || (value = *svp) == &PL_sv_undef)
1551 croak(no_aelem, (I32)LvTARGOFF(sv));
1554 (void)SvREFCNT_inc(value);
1555 SvREFCNT_dec(LvTARG(sv));
1558 SvREFCNT_dec(mg->mg_obj);
1559 mg->mg_obj = Nullsv;
1560 mg->mg_flags &= ~MGf_REFCOUNTED;
1564 magic_setmglob(SV *sv, MAGIC *mg)
1572 magic_setbm(SV *sv, MAGIC *mg)
1574 sv_unmagic(sv, 'B');
1580 magic_setfm(SV *sv, MAGIC *mg)
1582 sv_unmagic(sv, 'f');
1588 magic_setuvar(SV *sv, MAGIC *mg)
1590 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1592 if (uf && uf->uf_set)
1593 (*uf->uf_set)(uf->uf_index, sv);
1598 magic_freeregexp(SV *sv, MAGIC *mg)
1600 regexp *re = (regexp *)mg->mg_obj;
1605 #ifdef USE_LOCALE_COLLATE
1607 magic_setcollxfrm(SV *sv, MAGIC *mg)
1610 * René Descartes said "I think not."
1611 * and vanished with a faint plop.
1614 Safefree(mg->mg_ptr);
1620 #endif /* USE_LOCALE_COLLATE */
1623 magic_set(SV *sv, MAGIC *mg)
1629 switch (*mg->mg_ptr) {
1630 case '\001': /* ^A */
1631 sv_setsv(PL_bodytarget, sv);
1633 case '\002': /* ^B */
1634 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1635 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize))
1636 compiling.cop_warnings = WARN_ALL;
1637 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1638 compiling.cop_warnings = WARN_NONE;
1640 if (compiling.cop_warnings != WARN_NONE &&
1641 compiling.cop_warnings != WARN_ALL)
1642 sv_setsv(compiling.cop_warnings, sv);
1644 compiling.cop_warnings = newSVsv(sv) ;
1648 case '\004': /* ^D */
1649 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1650 DEBUG_x(dump_all());
1652 case '\005': /* ^E */
1654 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1657 SetLastError( SvIV(sv) );
1659 /* will anyone ever use this? */
1660 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1664 case '\006': /* ^F */
1665 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1667 case '\010': /* ^H */
1668 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1670 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1672 Safefree(PL_inplace);
1674 PL_inplace = savepv(SvPV(sv,PL_na));
1676 PL_inplace = Nullch;
1678 case '\017': /* ^O */
1680 Safefree(PL_osname);
1682 PL_osname = savepv(SvPV(sv,PL_na));
1686 case '\020': /* ^P */
1687 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1689 case '\024': /* ^T */
1691 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1693 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1696 case '\027': /* ^W */
1697 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1698 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1699 PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ;
1703 if (PL_localizing) {
1704 if (PL_localizing == 1)
1705 save_sptr((SV**)&PL_last_in_gv);
1707 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1708 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1711 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1712 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1713 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1716 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1717 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1718 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1721 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1724 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1725 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1726 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1729 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1733 IO *io = GvIOp(PL_defoutgv);
1734 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1735 IoFLAGS(io) &= ~IOf_FLUSH;
1737 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1738 PerlIO *ofp = IoOFP(io);
1740 (void)PerlIO_flush(ofp);
1741 IoFLAGS(io) |= IOf_FLUSH;
1747 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1748 PL_multiline = (i != 0);
1751 SvREFCNT_dec(PL_nrs);
1752 PL_nrs = newSVsv(sv);
1753 SvREFCNT_dec(PL_rs);
1754 PL_rs = SvREFCNT_inc(PL_nrs);
1759 if (SvOK(sv) || SvGMAGICAL(sv))
1760 PL_ors = savepv(SvPV(sv,PL_orslen));
1769 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1774 PL_ofmt = savepv(SvPV(sv,PL_na));
1777 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1780 #ifdef COMPLEX_STATUS
1781 if (PL_localizing == 2) {
1782 PL_statusvalue = LvTARGOFF(sv);
1783 PL_statusvalue_vms = LvTARGLEN(sv);
1787 #ifdef VMSISH_STATUS
1789 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1792 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1795 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1796 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1799 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1800 if (PL_delaymagic) {
1801 PL_delaymagic |= DM_RUID;
1802 break; /* don't do magic till later */
1805 (void)setruid((Uid_t)PL_uid);
1808 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1810 #ifdef HAS_SETRESUID
1811 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1813 if (PL_uid == PL_euid) /* special case $< = $> */
1814 (void)PerlProc_setuid(PL_uid);
1816 PL_uid = (I32)PerlProc_getuid();
1817 croak("setruid() not implemented");
1822 PL_uid = (I32)PerlProc_getuid();
1823 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1826 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1827 if (PL_delaymagic) {
1828 PL_delaymagic |= DM_EUID;
1829 break; /* don't do magic till later */
1832 (void)seteuid((Uid_t)PL_euid);
1835 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1837 #ifdef HAS_SETRESUID
1838 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1840 if (PL_euid == PL_uid) /* special case $> = $< */
1841 PerlProc_setuid(PL_euid);
1843 PL_euid = (I32)PerlProc_geteuid();
1844 croak("seteuid() not implemented");
1849 PL_euid = (I32)PerlProc_geteuid();
1850 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1853 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1854 if (PL_delaymagic) {
1855 PL_delaymagic |= DM_RGID;
1856 break; /* don't do magic till later */
1859 (void)setrgid((Gid_t)PL_gid);
1862 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1864 #ifdef HAS_SETRESGID
1865 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1867 if (PL_gid == PL_egid) /* special case $( = $) */
1868 (void)PerlProc_setgid(PL_gid);
1870 PL_gid = (I32)PerlProc_getgid();
1871 croak("setrgid() not implemented");
1876 PL_gid = (I32)PerlProc_getgid();
1877 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1880 #ifdef HAS_SETGROUPS
1882 char *p = SvPV(sv, PL_na);
1883 Groups_t gary[NGROUPS];
1885 SET_NUMERIC_STANDARD();
1888 PL_egid = I_V(atof(p));
1889 for (i = 0; i < NGROUPS; ++i) {
1890 while (*p && !isSPACE(*p))
1896 gary[i] = I_V(atof(p));
1899 (void)setgroups(i, gary);
1901 #else /* HAS_SETGROUPS */
1902 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1903 #endif /* HAS_SETGROUPS */
1904 if (PL_delaymagic) {
1905 PL_delaymagic |= DM_EGID;
1906 break; /* don't do magic till later */
1909 (void)setegid((Gid_t)PL_egid);
1912 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1914 #ifdef HAS_SETRESGID
1915 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1917 if (PL_egid == PL_gid) /* special case $) = $( */
1918 (void)PerlProc_setgid(PL_egid);
1920 PL_egid = (I32)PerlProc_getegid();
1921 croak("setegid() not implemented");
1926 PL_egid = (I32)PerlProc_getegid();
1927 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1930 PL_chopset = SvPV_force(sv,PL_na);
1936 /* See if all the arguments are contiguous in memory */
1937 for (i = 1; i < PL_origargc; i++) {
1938 if (PL_origargv[i] == s + 1
1940 || PL_origargv[i] == s + 2
1943 s += strlen(++s); /* this one is ok too */
1947 /* can grab env area too? */
1948 if (PL_origenviron && (PL_origenviron[0] == s + 1
1950 || (PL_origenviron[0] == s + 9 && (s += 8))
1953 my_setenv("NoNe SuCh", Nullch);
1954 /* force copy of environment */
1955 for (i = 0; PL_origenviron[i]; i++)
1956 if (PL_origenviron[i] == s + 1)
1961 PL_origalen = s - PL_origargv[0];
1963 s = SvPV_force(sv,len);
1965 if (i >= PL_origalen) {
1967 /* don't allow system to limit $0 seen by script */
1968 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1969 Copy(s, PL_origargv[0], i, char);
1970 s = PL_origargv[0]+i;
1974 Copy(s, PL_origargv[0], i, char);
1975 s = PL_origargv[0]+i;
1977 while (++i < PL_origalen)
1979 s = PL_origargv[0]+i;
1980 for (i = 1; i < PL_origargc; i++)
1981 PL_origargv[i] = Nullch;
1986 sv_setsv(thr->errsv, sv);
1988 #endif /* USE_THREADS */
1995 magic_mutexfree(SV *sv, MAGIC *mg)
1998 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1999 (unsigned long)thr, (unsigned long)sv);)
2001 croak("panic: magic_mutexfree");
2002 MUTEX_DESTROY(MgMUTEXP(mg));
2003 COND_DESTROY(MgCONDP(mg));
2007 #endif /* USE_THREADS */
2012 register char **sigv;
2014 for (sigv = sig_name+1; *sigv; sigv++)
2015 if (strEQ(sig,*sigv))
2016 return sig_num[sigv - sig_name];
2018 if (strEQ(sig,"CHLD"))
2022 if (strEQ(sig,"CLD"))
2031 unwind_handler_stack(void *p)
2034 U32 flags = *(U32*)p;
2037 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2038 /* cxstack_ix-- Not needed, die already unwound it. */
2040 SvREFCNT_dec(sig_sv);
2049 SV *sv, *tSv = PL_Sv;
2053 I32 o_save_i = PL_savestack_ix, type;
2056 if (PL_savestack_ix + 15 <= PL_savestack_max)
2058 if (PL_markstack_ptr < PL_markstack_max - 2)
2060 if (PL_retstack_ix < PL_retstack_max - 2)
2062 if (PL_scopestack_ix < PL_scopestack_max - 3)
2066 die("Signal SIG%s received, but no signal handler set.\n",
2069 /* Max number of items pushed there is 3*n or 4. We cannot fix
2070 infinity, so we fix 4 (in fact 5): */
2072 PL_savestack_ix += 5; /* Protect save in progress. */
2073 o_save_i = PL_savestack_ix;
2074 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
2077 PL_markstack_ptr++; /* Protect mark. */
2080 PL_retstack[PL_retstack_ix] = NULL;
2083 PL_scopestack_ix += 1;
2084 /* sv_2cv is too complicated, try a simpler variant first: */
2085 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
2086 || SvTYPE(cv) != SVt_PVCV)
2087 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
2089 if (!cv || !CvROOT(cv)) {
2090 if (ckWARN(WARN_SIGNAL))
2091 warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2092 sig_name[sig], (gv ? GvENAME(gv)
2099 if(psig_name[sig]) {
2100 sv = SvREFCNT_inc(psig_name[sig]);
2104 sv = sv_newmortal();
2105 sv_setpv(sv,sig_name[sig]);
2108 PUSHSTACKi(PERLSI_SIGNAL);
2113 perl_call_sv((SV*)cv, G_DISCARD);
2118 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2124 PL_scopestack_ix -= 1;
2127 PL_op = myop; /* Apparently not needed... */
2129 PL_Sv = tSv; /* Restore global temporaries. */