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)
51 assert(SvMAGICAL(sv));
53 SAVEDESTRUCTOR(restore_magic, (void*)mgs_ix);
55 mgs = SSPTR(mgs_ix, MGS*);
57 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
58 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
62 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
66 restore_magic(void *p)
68 MGS* mgs = SSPTR((I32)p, MGS*);
74 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
77 SvFLAGS(sv) |= mgs->mgs_flags;
81 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
84 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
86 /* If we're still on top of the stack, pop us off. (That condition
87 * will be satisfied if restore_magic was called explicitly, but *not*
88 * if it's being called via leave_scope.)
89 * The reason for doing this is that otherwise, things like sv_2cv()
90 * may leave alloc gunk on the savestack, and some code
91 * (e.g. sighandler) doesn't expect that...
93 if (PL_savestack_ix == mgs->mgs_ss_ix)
95 assert(SSPOPINT == SAVEt_DESTRUCTOR);
97 assert(SSPOPINT == SAVEt_ALLOC);
98 PL_savestack_ix -= SSPOPINT;
107 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
108 MGVTBL* vtbl = mg->mg_virtual;
110 if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP))
114 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL))
128 mgs_ix = SSNEW(sizeof(MGS));
129 save_magic(mgs_ix, sv);
132 while ((mg = *mgp) != 0) {
133 MGVTBL* vtbl = mg->mg_virtual;
134 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) {
135 (VTBL->svt_get)(sv, mg);
136 /* Ignore this magic if it's been deleted */
137 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
138 (mg->mg_flags & MGf_GSKIP))
139 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
141 /* Advance to next magic (complicated by possible deletion) */
142 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
143 mgp = &mg->mg_moremagic;
147 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
150 restore_magic((void*)mgs_ix);
161 mgs_ix = SSNEW(sizeof(MGS));
162 save_magic(mgs_ix, sv);
164 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
165 MGVTBL* vtbl = mg->mg_virtual;
166 nextmg = mg->mg_moremagic; /* it may delete itself */
167 if (mg->mg_flags & MGf_GSKIP) {
168 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
169 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
171 if (vtbl && (vtbl->svt_set != NULL))
172 (VTBL->svt_set)(sv, mg);
175 restore_magic((void*)mgs_ix);
186 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
187 MGVTBL* vtbl = mg->mg_virtual;
188 if (vtbl && (vtbl->svt_len != NULL)) {
191 mgs_ix = SSNEW(sizeof(MGS));
192 save_magic(mgs_ix, sv);
193 /* omit MGf_GSKIP -- not changed here */
194 len = (VTBL->svt_len)(sv, mg);
195 restore_magic((void*)mgs_ix);
200 junk = SvPV(sv, len);
210 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
211 MGVTBL* vtbl = mg->mg_virtual;
212 if (vtbl && (vtbl->svt_len != NULL)) {
215 mgs_ix = SSNEW(sizeof(MGS));
216 save_magic(mgs_ix, sv);
217 /* omit MGf_GSKIP -- not changed here */
218 len = (VTBL->svt_len)(sv, mg);
219 restore_magic((void*)mgs_ix);
226 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
231 croak("Size magic not implemented");
243 mgs_ix = SSNEW(sizeof(MGS));
244 save_magic(mgs_ix, sv);
246 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
247 MGVTBL* vtbl = mg->mg_virtual;
248 /* omit GSKIP -- never set here */
250 if (vtbl && (vtbl->svt_clear != NULL))
251 (VTBL->svt_clear)(sv, mg);
254 restore_magic((void*)mgs_ix);
259 mg_find(SV *sv, int type)
262 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
263 if (mg->mg_type == type)
270 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
274 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
275 if (isUPPER(mg->mg_type)) {
276 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
288 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
289 MGVTBL* vtbl = mg->mg_virtual;
290 moremagic = mg->mg_moremagic;
291 if (vtbl && (vtbl->svt_free != NULL))
292 (VTBL->svt_free)(sv, mg);
293 if (mg->mg_ptr && mg->mg_type != 'g')
295 Safefree(mg->mg_ptr);
296 else if (mg->mg_len == HEf_SVKEY)
297 SvREFCNT_dec((SV*)mg->mg_ptr);
298 if (mg->mg_flags & MGf_REFCOUNTED)
299 SvREFCNT_dec(mg->mg_obj);
306 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
311 magic_regdata_cnt(SV *sv, MAGIC *mg)
319 if (PL_curpm && (rx = PL_curpm->op_pmregexp))
320 return rx->lastparen;
325 magic_regdatum_get(SV *sv, MAGIC *mg)
334 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
338 if (paren <= rx->nparens &&
339 (s = rx->startp[paren]) &&
340 (t = rx->endp[paren]))
342 if (mg->mg_obj) /* @+ */
353 magic_len(SV *sv, MAGIC *mg)
362 switch (*mg->mg_ptr) {
363 case '1': case '2': case '3': case '4':
364 case '5': case '6': case '7': case '8': case '9': case '&':
365 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
366 paren = atoi(mg->mg_ptr);
368 if (paren <= rx->nparens &&
369 (s = rx->startp[paren]) &&
370 (t = rx->endp[paren]))
379 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
380 paren = rx->lastparen;
386 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
387 if ((s = rx->subbeg) && rx->startp[0]) {
388 i = rx->startp[0] - s;
395 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
396 if (rx->subend && (s = rx->endp[0])) {
404 return (STRLEN)PL_ofslen;
406 return (STRLEN)PL_orslen;
409 if (!SvPOK(sv) && SvNIOK(sv))
426 static char buffer[50] ;
431 sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ;
433 for (i = 0; i < SvCUR(sv) ; ++ i) {
434 sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ;
435 strcat(buffer, buf1) ;
445 magic_get(SV *sv, MAGIC *mg)
454 switch (*mg->mg_ptr) {
455 case '\001': /* ^A */
456 sv_setsv(sv, PL_bodytarget);
458 case '\002': /* ^B */
459 /* printf("magic_get $^B: ") ; */
460 if (curcop->cop_warnings == WARN_NONE)
461 /* printf("WARN_NONE\n"), */
462 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
463 else if (curcop->cop_warnings == WARN_ALL)
464 /* printf("WARN_ALL\n"), */
465 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
467 /* printf("some %s\n", printW(curcop->cop_warnings)), */
468 sv_setsv(sv, curcop->cop_warnings);
470 case '\004': /* ^D */
471 sv_setiv(sv, (IV)(PL_debug & 32767));
473 case '\005': /* ^E */
476 # include <descrip.h>
477 # include <starlet.h>
479 $DESCRIPTOR(msgdsc,msg);
480 sv_setnv(sv,(double) vaxc$errno);
481 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
482 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
488 if (!(_emx_env & 0x200)) { /* Under DOS */
489 sv_setnv(sv, (double)errno);
490 sv_setpv(sv, errno ? Strerror(errno) : "");
492 if (errno != errno_isOS2)
493 Perl_rc = _syserrno();
494 sv_setnv(sv, (double)Perl_rc);
495 sv_setpv(sv, os2error(Perl_rc));
500 DWORD dwErr = GetLastError();
501 sv_setnv(sv, (double)dwErr);
507 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
508 sv_setpvn(sv, sMsg, dwLen);
509 PerlProc_FreeBuf(sMsg);
511 win32_str_os_error(sv, dwErr);
519 sv_setnv(sv, (double)errno);
520 sv_setpv(sv, errno ? Strerror(errno) : "");
524 SvNOK_on(sv); /* what a wonderful hack! */
526 case '\006': /* ^F */
527 sv_setiv(sv, (IV)PL_maxsysfd);
529 case '\010': /* ^H */
530 sv_setiv(sv, (IV)PL_hints);
532 case '\011': /* ^I */ /* NOT \t in EBCDIC */
534 sv_setpv(sv, PL_inplace);
536 sv_setsv(sv, &PL_sv_undef);
538 case '\017': /* ^O */
539 sv_setpv(sv, PL_osname);
541 case '\020': /* ^P */
542 sv_setiv(sv, (IV)PL_perldb);
544 case '\023': /* ^S */
547 if (PL_lex_state != LEX_NOTPARSING)
555 case '\024': /* ^T */
557 sv_setnv(sv, PL_basetime);
559 sv_setiv(sv, (IV)PL_basetime);
562 case '\027': /* ^W */
563 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON));
565 case '1': case '2': case '3': case '4':
566 case '5': case '6': case '7': case '8': case '9': case '&':
567 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
569 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
570 * XXX Does the new way break anything?
572 paren = atoi(mg->mg_ptr);
574 if (paren <= rx->nparens &&
575 (s = rx->startp[paren]) &&
576 (t = rx->endp[paren]))
583 was_tainted = PL_tainted;
588 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
593 sv_setsv(sv,&PL_sv_undef);
596 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
597 paren = rx->lastparen;
601 sv_setsv(sv,&PL_sv_undef);
604 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
605 if ((s = rx->subbeg) && rx->startp[0]) {
606 i = rx->startp[0] - s;
610 sv_setsv(sv,&PL_sv_undef);
613 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
614 if (rx->subend && (s = rx->endp[0])) {
619 sv_setsv(sv,&PL_sv_undef);
623 if (GvIO(PL_last_in_gv)) {
624 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
630 sv_setiv(sv, (IV)STATUS_CURRENT);
631 #ifdef COMPLEX_STATUS
632 LvTARGOFF(sv) = PL_statusvalue;
633 LvTARGLEN(sv) = PL_statusvalue_vms;
638 s = IoTOP_NAME(GvIOp(PL_defoutgv));
642 sv_setpv(sv,GvENAME(PL_defoutgv));
647 s = IoFMT_NAME(GvIOp(PL_defoutgv));
649 s = GvENAME(PL_defoutgv);
654 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
657 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
660 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
668 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
671 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
674 sv_setpvn(sv,PL_ofs,PL_ofslen);
677 sv_setpvn(sv,PL_ors,PL_orslen);
680 sv_setpv(sv,PL_ofmt);
684 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
685 sv_setpv(sv, errno ? Strerror(errno) : "");
688 int saveerrno = errno;
689 sv_setnv(sv, (double)errno);
691 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
694 sv_setpv(sv, errno ? Strerror(errno) : "");
698 SvNOK_on(sv); /* what a wonderful hack! */
701 sv_setiv(sv, (IV)PL_uid);
704 sv_setiv(sv, (IV)PL_euid);
707 sv_setiv(sv, (IV)PL_gid);
708 sv_setpvf(sv, "%Vd", (IV)PL_gid);
711 sv_setiv(sv, (IV)PL_egid);
712 sv_setpvf(sv, "%Vd", (IV)PL_egid);
716 Groups_t gary[NGROUPS];
717 i = getgroups(NGROUPS,gary);
719 sv_catpvf(sv, " %Vd", (IV)gary[i]);
722 SvIOK_on(sv); /* what a wonderful hack! */
730 sv_setsv(sv, thr->errsv);
732 #endif /* USE_THREADS */
738 magic_getuvar(SV *sv, MAGIC *mg)
740 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
742 if (uf && uf->uf_val)
743 (*uf->uf_val)(uf->uf_index, sv);
748 magic_setenv(SV *sv, MAGIC *mg)
759 #ifdef DYNAMIC_ENV_FETCH
760 /* We just undefd an environment var. Is a replacement */
761 /* waiting in the wings? */
764 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
765 s = SvPV(*valp, len);
769 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
770 /* And you'll never guess what the dog had */
771 /* in its mouth... */
773 MgTAINTEDDIR_off(mg);
775 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
776 char pathbuf[256], eltbuf[256], *cp, *elt = s;
780 do { /* DCL$PATH may be a search list */
781 while (1) { /* as may dev portion of any element */
782 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
783 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
784 cando_by_name(S_IWUSR,0,elt) ) {
789 if ((cp = strchr(elt, ':')) != Nullch)
791 if (my_trnlnm(elt, eltbuf, j++))
797 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
800 if (s && klen == 4 && strEQ(ptr,"PATH")) {
801 char *strend = s + len;
806 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
809 if (i >= sizeof tmpbuf /* too long -- assume the worst */
811 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
818 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
824 magic_clearenv(SV *sv, MAGIC *mg)
826 my_setenv(MgPV(mg,PL_na),Nullch);
831 magic_set_all_env(SV *sv, MAGIC *mg)
834 die("Can't make list assignment to %%ENV on this system");
839 magic_clear_all_env(sv,mg);
840 hv_iterinit((HV*)sv);
841 while (entry = hv_iternext((HV*)sv)) {
843 my_setenv(hv_iterkey(entry, &keylen),
844 SvPV(hv_iterval((HV*)sv, entry), PL_na));
852 magic_clear_all_env(SV *sv, MAGIC *mg)
855 die("Can't make list assignment to %%ENV on this system");
858 char *envv = GetEnvironmentStrings();
862 char *end = strchr(cur,'=');
863 if (end && end != cur) {
865 my_setenv(cur,Nullch);
867 cur += strlen(end+1)+1;
869 else if ((len = strlen(cur)))
872 FreeEnvironmentStrings(envv);
876 if (environ == PL_origenviron)
877 New(901, environ, 1, char*);
879 for (i = 0; environ[i]; i++)
880 Safefree(environ[i]);
889 magic_getsig(SV *sv, MAGIC *mg)
892 /* Are we fetching a signal entry? */
893 i = whichsig(MgPV(mg,PL_na));
896 sv_setsv(sv,psig_ptr[i]);
898 Sighandler_t sigstate = rsignal_state(i);
900 /* cache state so we don't fetch it again */
901 if(sigstate == SIG_IGN)
902 sv_setpv(sv,"IGNORE");
904 sv_setsv(sv,&PL_sv_undef);
905 psig_ptr[i] = SvREFCNT_inc(sv);
912 magic_clearsig(SV *sv, MAGIC *mg)
915 /* Are we clearing a signal entry? */
916 i = whichsig(MgPV(mg,PL_na));
919 SvREFCNT_dec(psig_ptr[i]);
923 SvREFCNT_dec(psig_name[i]);
931 magic_setsig(SV *sv, MAGIC *mg)
940 if (strEQ(s,"__DIE__"))
942 else if (strEQ(s,"__WARN__"))
944 else if (strEQ(s,"__PARSE__"))
947 croak("No such hook: %s", s);
955 i = whichsig(s); /* ...no, a brick */
957 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
958 warner(WARN_SIGNAL, "No such signal: SIG%s", s);
961 SvREFCNT_dec(psig_name[i]);
962 SvREFCNT_dec(psig_ptr[i]);
963 psig_ptr[i] = SvREFCNT_inc(sv);
964 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
965 psig_name[i] = newSVpv(s, strlen(s));
966 SvREADONLY_on(psig_name[i]);
968 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
970 (void)rsignal(i, PL_sighandlerp);
972 *svp = SvREFCNT_inc(sv);
975 s = SvPV_force(sv,PL_na);
976 if (strEQ(s,"IGNORE")) {
978 (void)rsignal(i, SIG_IGN);
982 else if (strEQ(s,"DEFAULT") || !*s) {
984 (void)rsignal(i, SIG_DFL);
990 * We should warn if HINT_STRICT_REFS, but without
991 * access to a known hint bit in a known OP, we can't
992 * tell whether HINT_STRICT_REFS is in force or not.
994 if (!strchr(s,':') && !strchr(s,'\''))
995 sv_setpv(sv, form("main::%s", s));
997 (void)rsignal(i, PL_sighandlerp);
999 *svp = SvREFCNT_inc(sv);
1005 magic_setisa(SV *sv, MAGIC *mg)
1007 PL_sub_generation++;
1014 magic_setamagic(SV *sv, MAGIC *mg)
1016 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1017 PL_amagic_generation++;
1021 #endif /* OVERLOAD */
1024 magic_getnkeys(SV *sv, MAGIC *mg)
1026 HV *hv = (HV*)LvTARG(sv);
1031 (void) hv_iterinit(hv);
1032 if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
1036 while (entry = hv_iternext(hv)) {
1042 sv_setiv(sv, (IV)i);
1047 magic_setnkeys(SV *sv, MAGIC *mg)
1050 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1055 /* caller is responsible for stack switching/cleanup */
1057 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1066 if (mg->mg_len >= 0)
1067 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
1068 else if (mg->mg_len == HEf_SVKEY)
1069 PUSHs((SV*)mg->mg_ptr);
1071 else if (mg->mg_type == 'p') {
1072 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1080 return perl_call_method(meth, flags);
1084 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1090 PUSHSTACKi(PERLSI_MAGIC);
1092 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
1093 sv_setsv(sv, *PL_stack_sp--);
1103 magic_getpack(SV *sv, MAGIC *mg)
1105 magic_methpack(sv,mg,"FETCH");
1107 mg->mg_flags |= MGf_GSKIP;
1112 magic_setpack(SV *sv, MAGIC *mg)
1116 PUSHSTACKi(PERLSI_MAGIC);
1117 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1124 magic_clearpack(SV *sv, MAGIC *mg)
1126 return magic_methpack(sv,mg,"DELETE");
1131 magic_sizepack(SV *sv, MAGIC *mg)
1138 PUSHSTACKi(PERLSI_MAGIC);
1139 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1140 sv = *PL_stack_sp--;
1141 retval = (U32) SvIV(sv)-1;
1149 int magic_wipepack(SV *sv, MAGIC *mg)
1154 PUSHSTACKi(PERLSI_MAGIC);
1158 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1165 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1168 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1172 PUSHSTACKi(PERLSI_MAGIC);
1180 if (perl_call_method(meth, G_SCALAR))
1181 sv_setsv(key, *PL_stack_sp--);
1190 magic_existspack(SV *sv, MAGIC *mg)
1192 return magic_methpack(sv,mg,"EXISTS");
1196 magic_setdbline(SV *sv, MAGIC *mg)
1206 svp = av_fetch(GvAV(gv),
1207 atoi(MgPV(mg,PL_na)), FALSE);
1208 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1211 warn("Can't break at that line\n");
1216 magic_getarylen(SV *sv, MAGIC *mg)
1219 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1224 magic_setarylen(SV *sv, MAGIC *mg)
1227 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1232 magic_getpos(SV *sv, MAGIC *mg)
1234 SV* lsv = LvTARG(sv);
1236 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1237 mg = mg_find(lsv, 'g');
1238 if (mg && mg->mg_len >= 0) {
1242 sv_pos_b2u(lsv, &i);
1243 sv_setiv(sv, i + PL_curcop->cop_arybase);
1252 magic_setpos(SV *sv, MAGIC *mg)
1254 SV* lsv = LvTARG(sv);
1262 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1263 mg = mg_find(lsv, 'g');
1267 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1268 mg = mg_find(lsv, 'g');
1270 else if (!SvOK(sv)) {
1274 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1276 pos = SvIV(sv) - PL_curcop->cop_arybase;
1279 ulen = sv_len_utf8(lsv);
1296 sv_pos_u2b(lsv, &p, 0);
1301 mg->mg_flags &= ~MGf_MINMATCH;
1307 magic_getglob(SV *sv, MAGIC *mg)
1309 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1311 gv_efullname3(sv,((GV*)sv), "*");
1315 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1320 magic_setglob(SV *sv, MAGIC *mg)
1327 s = SvPV(sv, PL_na);
1328 if (*s == '*' && s[1])
1330 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1335 GvGP(sv) = gp_ref(GvGP(gv));
1340 magic_getsubstr(SV *sv, MAGIC *mg)
1343 SV *lsv = LvTARG(sv);
1344 char *tmps = SvPV(lsv,len);
1345 I32 offs = LvTARGOFF(sv);
1346 I32 rem = LvTARGLEN(sv);
1350 if (rem + offs > len)
1352 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1357 magic_setsubstr(SV *sv, MAGIC *mg)
1360 char *tmps = SvPV(sv,len);
1361 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1366 magic_gettaint(SV *sv, MAGIC *mg)
1369 TAINT_IF((mg->mg_len & 1) ||
1370 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1375 magic_settaint(SV *sv, MAGIC *mg)
1378 if (PL_localizing) {
1379 if (PL_localizing == 1)
1384 else if (PL_tainted)
1392 magic_getvec(SV *sv, MAGIC *mg)
1394 SV *lsv = LvTARG(sv);
1396 unsigned long retnum;
1406 s = (unsigned char *) SvPV(lsv, lsvlen);
1407 offset = LvTARGOFF(sv);
1408 size = LvTARGLEN(sv);
1409 len = (offset + size + 7) / 8;
1411 /* Copied from pp_vec() */
1419 if (offset >= lsvlen)
1422 retnum = (unsigned long) s[offset] << 8;
1424 else if (size == 32) {
1425 if (offset >= lsvlen)
1427 else if (offset + 1 >= lsvlen)
1428 retnum = (unsigned long) s[offset] << 24;
1429 else if (offset + 2 >= lsvlen)
1430 retnum = ((unsigned long) s[offset] << 24) +
1431 ((unsigned long) s[offset + 1] << 16);
1433 retnum = ((unsigned long) s[offset] << 24) +
1434 ((unsigned long) s[offset + 1] << 16) +
1435 (s[offset + 2] << 8);
1440 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1445 else if (size == 16)
1446 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1447 else if (size == 32)
1448 retnum = ((unsigned long) s[offset] << 24) +
1449 ((unsigned long) s[offset + 1] << 16) +
1450 (s[offset + 2] << 8) + s[offset+3];
1453 sv_setuv(sv, (UV)retnum);
1458 magic_setvec(SV *sv, MAGIC *mg)
1460 do_vecset(sv); /* XXX slurp this routine */
1465 magic_getdefelem(SV *sv, MAGIC *mg)
1468 if (LvTARGLEN(sv)) {
1470 SV *ahv = LvTARG(sv);
1471 if (SvTYPE(ahv) == SVt_PVHV) {
1472 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1477 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1483 AV* av = (AV*)LvTARG(sv);
1484 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1485 targ = AvARRAY(av)[LvTARGOFF(sv)];
1487 if (targ && targ != &PL_sv_undef) {
1488 dTHR; /* just for SvREFCNT_dec */
1489 /* somebody else defined it for us */
1490 SvREFCNT_dec(LvTARG(sv));
1491 LvTARG(sv) = SvREFCNT_inc(targ);
1493 SvREFCNT_dec(mg->mg_obj);
1494 mg->mg_obj = Nullsv;
1495 mg->mg_flags &= ~MGf_REFCOUNTED;
1500 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1505 magic_setdefelem(SV *sv, MAGIC *mg)
1510 sv_setsv(LvTARG(sv), sv);
1511 SvSETMAGIC(LvTARG(sv));
1517 vivify_defelem(SV *sv)
1519 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1523 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1526 SV *ahv = LvTARG(sv);
1527 if (SvTYPE(ahv) == SVt_PVHV) {
1528 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1533 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1537 if (!value || value == &PL_sv_undef)
1538 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1541 AV* av = (AV*)LvTARG(sv);
1542 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1543 LvTARG(sv) = Nullsv; /* array can't be extended */
1545 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1546 if (!svp || (value = *svp) == &PL_sv_undef)
1547 croak(no_aelem, (I32)LvTARGOFF(sv));
1550 (void)SvREFCNT_inc(value);
1551 SvREFCNT_dec(LvTARG(sv));
1554 SvREFCNT_dec(mg->mg_obj);
1555 mg->mg_obj = Nullsv;
1556 mg->mg_flags &= ~MGf_REFCOUNTED;
1560 magic_setmglob(SV *sv, MAGIC *mg)
1568 magic_setbm(SV *sv, MAGIC *mg)
1570 sv_unmagic(sv, 'B');
1576 magic_setfm(SV *sv, MAGIC *mg)
1578 sv_unmagic(sv, 'f');
1584 magic_setuvar(SV *sv, MAGIC *mg)
1586 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1588 if (uf && uf->uf_set)
1589 (*uf->uf_set)(uf->uf_index, sv);
1594 magic_freeregexp(SV *sv, MAGIC *mg)
1596 regexp *re = (regexp *)mg->mg_obj;
1601 #ifdef USE_LOCALE_COLLATE
1603 magic_setcollxfrm(SV *sv, MAGIC *mg)
1606 * René Descartes said "I think not."
1607 * and vanished with a faint plop.
1610 Safefree(mg->mg_ptr);
1616 #endif /* USE_LOCALE_COLLATE */
1619 magic_set(SV *sv, MAGIC *mg)
1625 switch (*mg->mg_ptr) {
1626 case '\001': /* ^A */
1627 sv_setsv(PL_bodytarget, sv);
1629 case '\002': /* ^B */
1630 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1631 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize))
1632 compiling.cop_warnings = WARN_ALL;
1633 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1634 compiling.cop_warnings = WARN_NONE;
1636 if (compiling.cop_warnings != WARN_NONE &&
1637 compiling.cop_warnings != WARN_ALL)
1638 sv_setsv(compiling.cop_warnings, sv);
1640 compiling.cop_warnings = newSVsv(sv) ;
1644 case '\004': /* ^D */
1645 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1646 DEBUG_x(dump_all());
1648 case '\005': /* ^E */
1650 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1653 SetLastError( SvIV(sv) );
1655 /* will anyone ever use this? */
1656 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1660 case '\006': /* ^F */
1661 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1663 case '\010': /* ^H */
1664 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1666 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1668 Safefree(PL_inplace);
1670 PL_inplace = savepv(SvPV(sv,PL_na));
1672 PL_inplace = Nullch;
1674 case '\017': /* ^O */
1676 Safefree(PL_osname);
1678 PL_osname = savepv(SvPV(sv,PL_na));
1682 case '\020': /* ^P */
1683 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1685 case '\024': /* ^T */
1687 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1689 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1692 case '\027': /* ^W */
1693 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1694 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1695 PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ;
1699 if (PL_localizing) {
1700 if (PL_localizing == 1)
1701 save_sptr((SV**)&PL_last_in_gv);
1703 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1704 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1707 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1708 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1709 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1712 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1713 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1714 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1717 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1720 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1721 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1722 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1725 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1729 IO *io = GvIOp(PL_defoutgv);
1730 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1731 IoFLAGS(io) &= ~IOf_FLUSH;
1733 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1734 PerlIO *ofp = IoOFP(io);
1736 (void)PerlIO_flush(ofp);
1737 IoFLAGS(io) |= IOf_FLUSH;
1743 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1744 PL_multiline = (i != 0);
1747 SvREFCNT_dec(PL_nrs);
1748 PL_nrs = newSVsv(sv);
1749 SvREFCNT_dec(PL_rs);
1750 PL_rs = SvREFCNT_inc(PL_nrs);
1755 if (SvOK(sv) || SvGMAGICAL(sv))
1756 PL_ors = savepv(SvPV(sv,PL_orslen));
1765 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1770 PL_ofmt = savepv(SvPV(sv,PL_na));
1773 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1776 #ifdef COMPLEX_STATUS
1777 if (PL_localizing == 2) {
1778 PL_statusvalue = LvTARGOFF(sv);
1779 PL_statusvalue_vms = LvTARGLEN(sv);
1783 #ifdef VMSISH_STATUS
1785 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1788 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1791 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1792 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1795 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1796 if (PL_delaymagic) {
1797 PL_delaymagic |= DM_RUID;
1798 break; /* don't do magic till later */
1801 (void)setruid((Uid_t)PL_uid);
1804 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1806 #ifdef HAS_SETRESUID
1807 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1809 if (PL_uid == PL_euid) /* special case $< = $> */
1810 (void)PerlProc_setuid(PL_uid);
1812 PL_uid = (I32)PerlProc_getuid();
1813 croak("setruid() not implemented");
1818 PL_uid = (I32)PerlProc_getuid();
1819 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1822 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1823 if (PL_delaymagic) {
1824 PL_delaymagic |= DM_EUID;
1825 break; /* don't do magic till later */
1828 (void)seteuid((Uid_t)PL_euid);
1831 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1833 #ifdef HAS_SETRESUID
1834 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1836 if (PL_euid == PL_uid) /* special case $> = $< */
1837 PerlProc_setuid(PL_euid);
1839 PL_euid = (I32)PerlProc_geteuid();
1840 croak("seteuid() not implemented");
1845 PL_euid = (I32)PerlProc_geteuid();
1846 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1849 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1850 if (PL_delaymagic) {
1851 PL_delaymagic |= DM_RGID;
1852 break; /* don't do magic till later */
1855 (void)setrgid((Gid_t)PL_gid);
1858 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1860 #ifdef HAS_SETRESGID
1861 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1863 if (PL_gid == PL_egid) /* special case $( = $) */
1864 (void)PerlProc_setgid(PL_gid);
1866 PL_gid = (I32)PerlProc_getgid();
1867 croak("setrgid() not implemented");
1872 PL_gid = (I32)PerlProc_getgid();
1873 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1876 #ifdef HAS_SETGROUPS
1878 char *p = SvPV(sv, PL_na);
1879 Groups_t gary[NGROUPS];
1881 SET_NUMERIC_STANDARD();
1884 PL_egid = I_V(atof(p));
1885 for (i = 0; i < NGROUPS; ++i) {
1886 while (*p && !isSPACE(*p))
1892 gary[i] = I_V(atof(p));
1895 (void)setgroups(i, gary);
1897 #else /* HAS_SETGROUPS */
1898 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1899 #endif /* HAS_SETGROUPS */
1900 if (PL_delaymagic) {
1901 PL_delaymagic |= DM_EGID;
1902 break; /* don't do magic till later */
1905 (void)setegid((Gid_t)PL_egid);
1908 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1910 #ifdef HAS_SETRESGID
1911 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1913 if (PL_egid == PL_gid) /* special case $) = $( */
1914 (void)PerlProc_setgid(PL_egid);
1916 PL_egid = (I32)PerlProc_getegid();
1917 croak("setegid() not implemented");
1922 PL_egid = (I32)PerlProc_getegid();
1923 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1926 PL_chopset = SvPV_force(sv,PL_na);
1932 /* See if all the arguments are contiguous in memory */
1933 for (i = 1; i < PL_origargc; i++) {
1934 if (PL_origargv[i] == s + 1
1936 || PL_origargv[i] == s + 2
1939 s += strlen(++s); /* this one is ok too */
1943 /* can grab env area too? */
1944 if (PL_origenviron && (PL_origenviron[0] == s + 1
1946 || (PL_origenviron[0] == s + 9 && (s += 8))
1949 my_setenv("NoNe SuCh", Nullch);
1950 /* force copy of environment */
1951 for (i = 0; PL_origenviron[i]; i++)
1952 if (PL_origenviron[i] == s + 1)
1957 PL_origalen = s - PL_origargv[0];
1959 s = SvPV_force(sv,len);
1961 if (i >= PL_origalen) {
1963 /* don't allow system to limit $0 seen by script */
1964 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1965 Copy(s, PL_origargv[0], i, char);
1966 s = PL_origargv[0]+i;
1970 Copy(s, PL_origargv[0], i, char);
1971 s = PL_origargv[0]+i;
1973 while (++i < PL_origalen)
1975 s = PL_origargv[0]+i;
1976 for (i = 1; i < PL_origargc; i++)
1977 PL_origargv[i] = Nullch;
1982 sv_setsv(thr->errsv, sv);
1984 #endif /* USE_THREADS */
1991 magic_mutexfree(SV *sv, MAGIC *mg)
1994 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1995 (unsigned long)thr, (unsigned long)sv);)
1997 croak("panic: magic_mutexfree");
1998 MUTEX_DESTROY(MgMUTEXP(mg));
1999 COND_DESTROY(MgCONDP(mg));
2003 #endif /* USE_THREADS */
2008 register char **sigv;
2010 for (sigv = sig_name+1; *sigv; sigv++)
2011 if (strEQ(sig,*sigv))
2012 return sig_num[sigv - sig_name];
2014 if (strEQ(sig,"CHLD"))
2018 if (strEQ(sig,"CLD"))
2027 unwind_handler_stack(void *p)
2030 U32 flags = *(U32*)p;
2033 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2034 /* cxstack_ix-- Not needed, die already unwound it. */
2036 SvREFCNT_dec(sig_sv);
2045 SV *sv, *tSv = PL_Sv;
2049 I32 o_save_i = PL_savestack_ix, type;
2052 if (PL_savestack_ix + 15 <= PL_savestack_max)
2054 if (PL_markstack_ptr < PL_markstack_max - 2)
2056 if (PL_retstack_ix < PL_retstack_max - 2)
2058 if (PL_scopestack_ix < PL_scopestack_max - 3)
2062 die("Signal SIG%s received, but no signal handler set.\n",
2065 /* Max number of items pushed there is 3*n or 4. We cannot fix
2066 infinity, so we fix 4 (in fact 5): */
2068 PL_savestack_ix += 5; /* Protect save in progress. */
2069 o_save_i = PL_savestack_ix;
2070 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
2073 PL_markstack_ptr++; /* Protect mark. */
2076 PL_retstack[PL_retstack_ix] = NULL;
2079 PL_scopestack_ix += 1;
2080 /* sv_2cv is too complicated, try a simpler variant first: */
2081 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
2082 || SvTYPE(cv) != SVt_PVCV)
2083 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
2085 if (!cv || !CvROOT(cv)) {
2086 if (ckWARN(WARN_SIGNAL))
2087 warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2088 sig_name[sig], (gv ? GvENAME(gv)
2095 if(psig_name[sig]) {
2096 sv = SvREFCNT_inc(psig_name[sig]);
2100 sv = sv_newmortal();
2101 sv_setpv(sv,sig_name[sig]);
2104 PUSHSTACKi(PERLSI_SIGNAL);
2109 perl_call_sv((SV*)cv, G_DISCARD);
2114 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2120 PL_scopestack_ix -= 1;
2123 PL_op = myop; /* Apparently not needed... */
2125 PL_Sv = tSv; /* Restore global temporaries. */