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));
34 static int magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 f, int n, SV *val);
38 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
46 /* MGS is typedef'ed to struct magic_state in perl.h */
49 save_magic(I32 mgs_ix, SV *sv)
53 assert(SvMAGICAL(sv));
55 SAVEDESTRUCTOR(restore_magic, (void*)mgs_ix);
57 mgs = SSPTR(mgs_ix, MGS*);
59 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
60 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
64 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
68 restore_magic(void *p)
71 MGS* mgs = SSPTR((I32)p, MGS*);
77 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
80 SvFLAGS(sv) |= mgs->mgs_flags;
84 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
87 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
89 /* If we're still on top of the stack, pop us off. (That condition
90 * will be satisfied if restore_magic was called explicitly, but *not*
91 * if it's being called via leave_scope.)
92 * The reason for doing this is that otherwise, things like sv_2cv()
93 * may leave alloc gunk on the savestack, and some code
94 * (e.g. sighandler) doesn't expect that...
96 if (PL_savestack_ix == mgs->mgs_ss_ix)
98 I32 popval = SSPOPINT;
99 assert(popval == SAVEt_DESTRUCTOR);
100 PL_savestack_ix -= 2;
102 assert(popval == SAVEt_ALLOC);
104 PL_savestack_ix -= popval;
113 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
114 MGVTBL* vtbl = mg->mg_virtual;
116 if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP))
120 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL))
135 mgs_ix = SSNEW(sizeof(MGS));
136 save_magic(mgs_ix, sv);
139 while ((mg = *mgp) != 0) {
140 MGVTBL* vtbl = mg->mg_virtual;
141 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) {
142 (VTBL->svt_get)(sv, mg);
143 /* Ignore this magic if it's been deleted */
144 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
145 (mg->mg_flags & MGf_GSKIP))
146 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
148 /* Advance to next magic (complicated by possible deletion) */
149 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
150 mgp = &mg->mg_moremagic;
154 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
157 restore_magic((void*)mgs_ix);
169 mgs_ix = SSNEW(sizeof(MGS));
170 save_magic(mgs_ix, sv);
172 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
173 MGVTBL* vtbl = mg->mg_virtual;
174 nextmg = mg->mg_moremagic; /* it may delete itself */
175 if (mg->mg_flags & MGf_GSKIP) {
176 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
177 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
179 if (vtbl && (vtbl->svt_set != NULL))
180 (VTBL->svt_set)(sv, mg);
183 restore_magic((void*)mgs_ix);
194 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
195 MGVTBL* vtbl = mg->mg_virtual;
196 if (vtbl && (vtbl->svt_len != NULL)) {
199 mgs_ix = SSNEW(sizeof(MGS));
200 save_magic(mgs_ix, sv);
201 /* omit MGf_GSKIP -- not changed here */
202 len = (VTBL->svt_len)(sv, mg);
203 restore_magic((void*)mgs_ix);
208 junk = SvPV(sv, len);
218 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
219 MGVTBL* vtbl = mg->mg_virtual;
220 if (vtbl && (vtbl->svt_len != NULL)) {
223 mgs_ix = SSNEW(sizeof(MGS));
224 save_magic(mgs_ix, sv);
225 /* omit MGf_GSKIP -- not changed here */
226 len = (VTBL->svt_len)(sv, mg);
227 restore_magic((void*)mgs_ix);
234 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
239 croak("Size magic not implemented");
251 mgs_ix = SSNEW(sizeof(MGS));
252 save_magic(mgs_ix, sv);
254 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
255 MGVTBL* vtbl = mg->mg_virtual;
256 /* omit GSKIP -- never set here */
258 if (vtbl && (vtbl->svt_clear != NULL))
259 (VTBL->svt_clear)(sv, mg);
262 restore_magic((void*)mgs_ix);
267 mg_find(SV *sv, int type)
270 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
271 if (mg->mg_type == type)
278 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
282 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
283 if (isUPPER(mg->mg_type)) {
285 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) : mg->mg_obj,
286 toLOWER(mg->mg_type), key, klen);
298 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
299 MGVTBL* vtbl = mg->mg_virtual;
300 moremagic = mg->mg_moremagic;
301 if (vtbl && (vtbl->svt_free != NULL))
302 (VTBL->svt_free)(sv, mg);
303 if (mg->mg_ptr && mg->mg_type != 'g')
305 Safefree(mg->mg_ptr);
306 else if (mg->mg_len == HEf_SVKEY)
307 SvREFCNT_dec((SV*)mg->mg_ptr);
308 if (mg->mg_flags & MGf_REFCOUNTED)
309 SvREFCNT_dec(mg->mg_obj);
316 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
321 magic_regdata_cnt(SV *sv, MAGIC *mg)
329 if (PL_curpm && (rx = PL_curpm->op_pmregexp))
330 return rx->lastparen;
335 magic_regdatum_get(SV *sv, MAGIC *mg)
344 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
348 if (paren <= rx->nparens &&
349 (s = rx->startp[paren]) &&
350 (t = rx->endp[paren]))
352 if (mg->mg_obj) /* @+ */
363 magic_len(SV *sv, MAGIC *mg)
372 switch (*mg->mg_ptr) {
373 case '1': case '2': case '3': case '4':
374 case '5': case '6': case '7': case '8': case '9': case '&':
375 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
376 paren = atoi(mg->mg_ptr);
378 if (paren <= rx->nparens &&
379 (s = rx->startp[paren]) &&
380 (t = rx->endp[paren]))
389 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
390 paren = rx->lastparen;
396 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
397 if ((s = rx->subbeg) && rx->startp[0]) {
398 i = rx->startp[0] - s;
405 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
406 if (rx->subend && (s = rx->endp[0])) {
414 return (STRLEN)PL_ofslen;
416 return (STRLEN)PL_orslen;
419 if (!SvPOK(sv) && SvNIOK(sv))
436 static char buffer[50] ;
441 sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ;
443 for (i = 0; i < SvCUR(sv) ; ++ i) {
444 sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ;
445 strcat(buffer, buf1) ;
455 magic_get(SV *sv, MAGIC *mg)
464 switch (*mg->mg_ptr) {
465 case '\001': /* ^A */
466 sv_setsv(sv, PL_bodytarget);
468 case '\002': /* ^B */
469 /* printf("magic_get $^B: ") ; */
470 if (PL_curcop->cop_warnings == WARN_NONE)
471 /* printf("WARN_NONE\n"), */
472 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
473 else if (PL_curcop->cop_warnings == WARN_ALL)
474 /* printf("WARN_ALL\n"), */
475 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
477 /* printf("some %s\n", printW(PL_curcop->cop_warnings)), */
478 sv_setsv(sv, PL_curcop->cop_warnings);
480 case '\004': /* ^D */
481 sv_setiv(sv, (IV)(PL_debug & 32767));
483 case '\005': /* ^E */
486 # include <descrip.h>
487 # include <starlet.h>
489 $DESCRIPTOR(msgdsc,msg);
490 sv_setnv(sv,(double) vaxc$errno);
491 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
492 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
498 if (!(_emx_env & 0x200)) { /* Under DOS */
499 sv_setnv(sv, (double)errno);
500 sv_setpv(sv, errno ? Strerror(errno) : "");
502 if (errno != errno_isOS2) {
503 int tmp = _syserrno();
504 if (tmp) /* 2nd call to _syserrno() makes it 0 */
507 sv_setnv(sv, (double)Perl_rc);
508 sv_setpv(sv, os2error(Perl_rc));
513 DWORD dwErr = GetLastError();
514 sv_setnv(sv, (double)dwErr);
520 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
521 sv_setpvn(sv, sMsg, dwLen);
522 PerlProc_FreeBuf(sMsg);
524 win32_str_os_error(sv, dwErr);
532 sv_setnv(sv, (double)errno);
533 sv_setpv(sv, errno ? Strerror(errno) : "");
537 SvNOK_on(sv); /* what a wonderful hack! */
539 case '\006': /* ^F */
540 sv_setiv(sv, (IV)PL_maxsysfd);
542 case '\010': /* ^H */
543 sv_setiv(sv, (IV)PL_hints);
545 case '\011': /* ^I */ /* NOT \t in EBCDIC */
547 sv_setpv(sv, PL_inplace);
549 sv_setsv(sv, &PL_sv_undef);
551 case '\017': /* ^O */
552 sv_setpv(sv, PL_osname);
554 case '\020': /* ^P */
555 sv_setiv(sv, (IV)PL_perldb);
557 case '\023': /* ^S */
560 if (PL_lex_state != LEX_NOTPARSING)
568 case '\024': /* ^T */
570 sv_setnv(sv, PL_basetime);
572 sv_setiv(sv, (IV)PL_basetime);
575 case '\027': /* ^W */
576 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON));
578 case '1': case '2': case '3': case '4':
579 case '5': case '6': case '7': case '8': case '9': case '&':
580 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
582 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
583 * XXX Does the new way break anything?
585 paren = atoi(mg->mg_ptr);
587 if (paren <= rx->nparens &&
588 (s = rx->startp[paren]) &&
589 (t = rx->endp[paren]))
596 was_tainted = PL_tainted;
601 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
606 sv_setsv(sv,&PL_sv_undef);
609 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
610 paren = rx->lastparen;
614 sv_setsv(sv,&PL_sv_undef);
617 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
618 if ((s = rx->subbeg) && rx->startp[0]) {
619 i = rx->startp[0] - s;
623 sv_setsv(sv,&PL_sv_undef);
626 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
627 if (rx->subend && (s = rx->endp[0])) {
632 sv_setsv(sv,&PL_sv_undef);
636 if (GvIO(PL_last_in_gv)) {
637 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
643 sv_setiv(sv, (IV)STATUS_CURRENT);
644 #ifdef COMPLEX_STATUS
645 LvTARGOFF(sv) = PL_statusvalue;
646 LvTARGLEN(sv) = PL_statusvalue_vms;
651 s = IoTOP_NAME(GvIOp(PL_defoutgv));
655 sv_setpv(sv,GvENAME(PL_defoutgv));
660 s = IoFMT_NAME(GvIOp(PL_defoutgv));
662 s = GvENAME(PL_defoutgv);
667 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
670 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
673 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
681 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
684 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
687 sv_setpvn(sv,PL_ofs,PL_ofslen);
690 sv_setpvn(sv,PL_ors,PL_orslen);
693 sv_setpv(sv,PL_ofmt);
697 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
698 sv_setpv(sv, errno ? Strerror(errno) : "");
701 int saveerrno = errno;
702 sv_setnv(sv, (double)errno);
704 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
707 sv_setpv(sv, errno ? Strerror(errno) : "");
711 SvNOK_on(sv); /* what a wonderful hack! */
714 sv_setiv(sv, (IV)PL_uid);
717 sv_setiv(sv, (IV)PL_euid);
720 sv_setiv(sv, (IV)PL_gid);
721 sv_setpvf(sv, "%Vd", (IV)PL_gid);
724 sv_setiv(sv, (IV)PL_egid);
725 sv_setpvf(sv, "%Vd", (IV)PL_egid);
729 Groups_t gary[NGROUPS];
730 i = getgroups(NGROUPS,gary);
732 sv_catpvf(sv, " %Vd", (IV)gary[i]);
735 SvIOK_on(sv); /* what a wonderful hack! */
743 sv_setsv(sv, thr->errsv);
745 #endif /* USE_THREADS */
751 magic_getuvar(SV *sv, MAGIC *mg)
753 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
755 if (uf && uf->uf_val)
756 (*uf->uf_val)(uf->uf_index, sv);
761 magic_setenv(SV *sv, MAGIC *mg)
772 #ifdef DYNAMIC_ENV_FETCH
773 /* We just undefd an environment var. Is a replacement */
774 /* waiting in the wings? */
777 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
778 s = SvPV(*valp, len);
782 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
783 /* And you'll never guess what the dog had */
784 /* in its mouth... */
786 MgTAINTEDDIR_off(mg);
788 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
789 char pathbuf[256], eltbuf[256], *cp, *elt = s;
793 do { /* DCL$PATH may be a search list */
794 while (1) { /* as may dev portion of any element */
795 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
796 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
797 cando_by_name(S_IWUSR,0,elt) ) {
802 if ((cp = strchr(elt, ':')) != Nullch)
804 if (my_trnlnm(elt, eltbuf, j++))
810 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
813 if (s && klen == 4 && strEQ(ptr,"PATH")) {
814 char *strend = s + len;
819 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
822 if (i >= sizeof tmpbuf /* too long -- assume the worst */
824 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
831 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
837 magic_clearenv(SV *sv, MAGIC *mg)
839 my_setenv(MgPV(mg,PL_na),Nullch);
844 magic_set_all_env(SV *sv, MAGIC *mg)
847 die("Can't make list assignment to %%ENV on this system");
852 magic_clear_all_env(sv,mg);
853 hv_iterinit((HV*)sv);
854 while (entry = hv_iternext((HV*)sv)) {
856 my_setenv(hv_iterkey(entry, &keylen),
857 SvPV(hv_iterval((HV*)sv, entry), PL_na));
865 magic_clear_all_env(SV *sv, MAGIC *mg)
868 die("Can't make list assignment to %%ENV on this system");
871 char *envv = GetEnvironmentStrings();
875 char *end = strchr(cur,'=');
876 if (end && end != cur) {
878 my_setenv(cur,Nullch);
880 cur += strlen(end+1)+1;
882 else if ((len = strlen(cur)))
885 FreeEnvironmentStrings(envv);
889 if (environ == PL_origenviron)
890 New(901, environ, 1, char*);
892 for (i = 0; environ[i]; i++)
893 Safefree(environ[i]);
902 magic_getsig(SV *sv, MAGIC *mg)
905 /* Are we fetching a signal entry? */
906 i = whichsig(MgPV(mg,PL_na));
909 sv_setsv(sv,PL_psig_ptr[i]);
911 Sighandler_t sigstate = rsignal_state(i);
913 /* cache state so we don't fetch it again */
914 if(sigstate == SIG_IGN)
915 sv_setpv(sv,"IGNORE");
917 sv_setsv(sv,&PL_sv_undef);
918 PL_psig_ptr[i] = SvREFCNT_inc(sv);
925 magic_clearsig(SV *sv, MAGIC *mg)
928 /* Are we clearing a signal entry? */
929 i = whichsig(MgPV(mg,PL_na));
932 SvREFCNT_dec(PL_psig_ptr[i]);
935 if(PL_psig_name[i]) {
936 SvREFCNT_dec(PL_psig_name[i]);
944 magic_setsig(SV *sv, MAGIC *mg)
954 if (strEQ(s,"__DIE__"))
956 else if (strEQ(s,"__WARN__"))
958 else if (strEQ(s,"__PARSE__"))
961 croak("No such hook: %s", s);
969 i = whichsig(s); /* ...no, a brick */
971 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
972 warner(WARN_SIGNAL, "No such signal: SIG%s", s);
975 SvREFCNT_dec(PL_psig_name[i]);
976 SvREFCNT_dec(PL_psig_ptr[i]);
977 PL_psig_ptr[i] = SvREFCNT_inc(sv);
978 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
979 PL_psig_name[i] = newSVpvn(s, len);
980 SvREADONLY_on(PL_psig_name[i]);
982 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
984 (void)rsignal(i, PL_sighandlerp);
986 *svp = SvREFCNT_inc(sv);
989 s = SvPV_force(sv,len);
990 if (strEQ(s,"IGNORE")) {
992 (void)rsignal(i, SIG_IGN);
996 else if (strEQ(s,"DEFAULT") || !*s) {
998 (void)rsignal(i, SIG_DFL);
1004 * We should warn if HINT_STRICT_REFS, but without
1005 * access to a known hint bit in a known OP, we can't
1006 * tell whether HINT_STRICT_REFS is in force or not.
1008 if (!strchr(s,':') && !strchr(s,'\''))
1009 sv_insert(sv, 0, 0, "main::", 6);
1011 (void)rsignal(i, PL_sighandlerp);
1013 *svp = SvREFCNT_inc(sv);
1019 magic_setisa(SV *sv, MAGIC *mg)
1021 PL_sub_generation++;
1028 magic_setamagic(SV *sv, MAGIC *mg)
1030 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1031 PL_amagic_generation++;
1035 #endif /* OVERLOAD */
1038 magic_getnkeys(SV *sv, MAGIC *mg)
1040 HV *hv = (HV*)LvTARG(sv);
1045 (void) hv_iterinit(hv);
1046 if (! SvTIED_mg((SV*)hv, 'P'))
1050 while (entry = hv_iternext(hv)) {
1056 sv_setiv(sv, (IV)i);
1061 magic_setnkeys(SV *sv, MAGIC *mg)
1064 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1069 /* caller is responsible for stack switching/cleanup */
1071 magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1077 PUSHs(SvTIED_obj(sv, mg));
1080 if (mg->mg_len >= 0)
1081 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
1082 else if (mg->mg_len == HEf_SVKEY)
1083 PUSHs((SV*)mg->mg_ptr);
1085 else if (mg->mg_type == 'p') {
1086 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1094 return perl_call_method(meth, flags);
1098 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1104 PUSHSTACKi(PERLSI_MAGIC);
1106 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1107 sv_setsv(sv, *PL_stack_sp--);
1117 magic_getpack(SV *sv, MAGIC *mg)
1119 magic_methpack(sv,mg,"FETCH");
1121 mg->mg_flags |= MGf_GSKIP;
1126 magic_setpack(SV *sv, MAGIC *mg)
1130 PUSHSTACKi(PERLSI_MAGIC);
1131 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1138 magic_clearpack(SV *sv, MAGIC *mg)
1140 return magic_methpack(sv,mg,"DELETE");
1145 magic_sizepack(SV *sv, MAGIC *mg)
1152 PUSHSTACKi(PERLSI_MAGIC);
1153 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1154 sv = *PL_stack_sp--;
1155 retval = (U32) SvIV(sv)-1;
1163 int magic_wipepack(SV *sv, MAGIC *mg)
1168 PUSHSTACKi(PERLSI_MAGIC);
1170 XPUSHs(SvTIED_obj(sv, mg));
1172 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1179 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1182 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1186 PUSHSTACKi(PERLSI_MAGIC);
1189 PUSHs(SvTIED_obj(sv, mg));
1194 if (perl_call_method(meth, G_SCALAR))
1195 sv_setsv(key, *PL_stack_sp--);
1204 magic_existspack(SV *sv, MAGIC *mg)
1206 return magic_methpack(sv,mg,"EXISTS");
1210 magic_setdbline(SV *sv, MAGIC *mg)
1220 svp = av_fetch(GvAV(gv),
1221 atoi(MgPV(mg,PL_na)), FALSE);
1222 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1225 warn("Can't break at that line\n");
1230 magic_getarylen(SV *sv, MAGIC *mg)
1233 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1238 magic_setarylen(SV *sv, MAGIC *mg)
1241 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1246 magic_getpos(SV *sv, MAGIC *mg)
1248 SV* lsv = LvTARG(sv);
1250 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1251 mg = mg_find(lsv, 'g');
1252 if (mg && mg->mg_len >= 0) {
1256 sv_pos_b2u(lsv, &i);
1257 sv_setiv(sv, i + PL_curcop->cop_arybase);
1266 magic_setpos(SV *sv, MAGIC *mg)
1268 SV* lsv = LvTARG(sv);
1276 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1277 mg = mg_find(lsv, 'g');
1281 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1282 mg = mg_find(lsv, 'g');
1284 else if (!SvOK(sv)) {
1288 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1290 pos = SvIV(sv) - PL_curcop->cop_arybase;
1293 ulen = sv_len_utf8(lsv);
1310 sv_pos_u2b(lsv, &p, 0);
1315 mg->mg_flags &= ~MGf_MINMATCH;
1321 magic_getglob(SV *sv, MAGIC *mg)
1323 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1325 gv_efullname3(sv,((GV*)sv), "*");
1329 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1334 magic_setglob(SV *sv, MAGIC *mg)
1341 s = SvPV(sv, PL_na);
1342 if (*s == '*' && s[1])
1344 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1349 GvGP(sv) = gp_ref(GvGP(gv));
1354 magic_getsubstr(SV *sv, MAGIC *mg)
1357 SV *lsv = LvTARG(sv);
1358 char *tmps = SvPV(lsv,len);
1359 I32 offs = LvTARGOFF(sv);
1360 I32 rem = LvTARGLEN(sv);
1364 if (rem + offs > len)
1366 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1371 magic_setsubstr(SV *sv, MAGIC *mg)
1374 char *tmps = SvPV(sv,len);
1375 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1380 magic_gettaint(SV *sv, MAGIC *mg)
1383 TAINT_IF((mg->mg_len & 1) ||
1384 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1389 magic_settaint(SV *sv, MAGIC *mg)
1392 if (PL_localizing) {
1393 if (PL_localizing == 1)
1398 else if (PL_tainted)
1406 magic_getvec(SV *sv, MAGIC *mg)
1408 SV *lsv = LvTARG(sv);
1410 unsigned long retnum;
1420 s = (unsigned char *) SvPV(lsv, lsvlen);
1421 offset = LvTARGOFF(sv);
1422 size = LvTARGLEN(sv);
1423 len = (offset + size + 7) / 8;
1425 /* Copied from pp_vec() */
1433 if (offset >= lsvlen)
1436 retnum = (unsigned long) s[offset] << 8;
1438 else if (size == 32) {
1439 if (offset >= lsvlen)
1441 else if (offset + 1 >= lsvlen)
1442 retnum = (unsigned long) s[offset] << 24;
1443 else if (offset + 2 >= lsvlen)
1444 retnum = ((unsigned long) s[offset] << 24) +
1445 ((unsigned long) s[offset + 1] << 16);
1447 retnum = ((unsigned long) s[offset] << 24) +
1448 ((unsigned long) s[offset + 1] << 16) +
1449 (s[offset + 2] << 8);
1454 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1459 else if (size == 16)
1460 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1461 else if (size == 32)
1462 retnum = ((unsigned long) s[offset] << 24) +
1463 ((unsigned long) s[offset + 1] << 16) +
1464 (s[offset + 2] << 8) + s[offset+3];
1467 sv_setuv(sv, (UV)retnum);
1472 magic_setvec(SV *sv, MAGIC *mg)
1474 do_vecset(sv); /* XXX slurp this routine */
1479 magic_getdefelem(SV *sv, MAGIC *mg)
1482 if (LvTARGLEN(sv)) {
1484 SV *ahv = LvTARG(sv);
1485 if (SvTYPE(ahv) == SVt_PVHV) {
1486 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1491 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1497 AV* av = (AV*)LvTARG(sv);
1498 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1499 targ = AvARRAY(av)[LvTARGOFF(sv)];
1501 if (targ && targ != &PL_sv_undef) {
1502 dTHR; /* just for SvREFCNT_dec */
1503 /* somebody else defined it for us */
1504 SvREFCNT_dec(LvTARG(sv));
1505 LvTARG(sv) = SvREFCNT_inc(targ);
1507 SvREFCNT_dec(mg->mg_obj);
1508 mg->mg_obj = Nullsv;
1509 mg->mg_flags &= ~MGf_REFCOUNTED;
1514 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1519 magic_setdefelem(SV *sv, MAGIC *mg)
1524 sv_setsv(LvTARG(sv), sv);
1525 SvSETMAGIC(LvTARG(sv));
1531 vivify_defelem(SV *sv)
1533 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1537 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1540 SV *ahv = LvTARG(sv);
1541 if (SvTYPE(ahv) == SVt_PVHV) {
1542 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1547 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1551 if (!value || value == &PL_sv_undef)
1552 croak(PL_no_helem, SvPV(mg->mg_obj, PL_na));
1555 AV* av = (AV*)LvTARG(sv);
1556 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1557 LvTARG(sv) = Nullsv; /* array can't be extended */
1559 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1560 if (!svp || (value = *svp) == &PL_sv_undef)
1561 croak(PL_no_aelem, (I32)LvTARGOFF(sv));
1564 (void)SvREFCNT_inc(value);
1565 SvREFCNT_dec(LvTARG(sv));
1568 SvREFCNT_dec(mg->mg_obj);
1569 mg->mg_obj = Nullsv;
1570 mg->mg_flags &= ~MGf_REFCOUNTED;
1574 magic_setmglob(SV *sv, MAGIC *mg)
1582 magic_setbm(SV *sv, MAGIC *mg)
1584 sv_unmagic(sv, 'B');
1590 magic_setfm(SV *sv, MAGIC *mg)
1592 sv_unmagic(sv, 'f');
1598 magic_setuvar(SV *sv, MAGIC *mg)
1600 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1602 if (uf && uf->uf_set)
1603 (*uf->uf_set)(uf->uf_index, sv);
1608 magic_freeregexp(SV *sv, MAGIC *mg)
1610 regexp *re = (regexp *)mg->mg_obj;
1615 #ifdef USE_LOCALE_COLLATE
1617 magic_setcollxfrm(SV *sv, MAGIC *mg)
1620 * RenE<eacute> Descartes said "I think not."
1621 * and vanished with a faint plop.
1624 Safefree(mg->mg_ptr);
1630 #endif /* USE_LOCALE_COLLATE */
1633 magic_set(SV *sv, MAGIC *mg)
1639 switch (*mg->mg_ptr) {
1640 case '\001': /* ^A */
1641 sv_setsv(PL_bodytarget, sv);
1643 case '\002': /* ^B */
1644 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1645 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize))
1646 PL_compiling.cop_warnings = WARN_ALL;
1647 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1648 PL_compiling.cop_warnings = WARN_NONE;
1650 if (PL_compiling.cop_warnings != WARN_NONE &&
1651 PL_compiling.cop_warnings != WARN_ALL)
1652 sv_setsv(PL_compiling.cop_warnings, sv);
1654 PL_compiling.cop_warnings = newSVsv(sv) ;
1658 case '\004': /* ^D */
1659 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1660 DEBUG_x(dump_all());
1662 case '\005': /* ^E */
1664 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1667 SetLastError( SvIV(sv) );
1669 /* will anyone ever use this? */
1670 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1674 case '\006': /* ^F */
1675 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1677 case '\010': /* ^H */
1678 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1680 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1682 Safefree(PL_inplace);
1684 PL_inplace = savepv(SvPV(sv,PL_na));
1686 PL_inplace = Nullch;
1688 case '\017': /* ^O */
1690 Safefree(PL_osname);
1692 PL_osname = savepv(SvPV(sv,PL_na));
1696 case '\020': /* ^P */
1697 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1699 case '\024': /* ^T */
1701 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1703 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1706 case '\027': /* ^W */
1707 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1708 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1709 PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ;
1713 if (PL_localizing) {
1714 if (PL_localizing == 1)
1715 save_sptr((SV**)&PL_last_in_gv);
1717 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1718 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1721 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1722 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1723 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1726 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1727 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1728 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1731 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1734 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1735 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1736 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1739 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1743 IO *io = GvIOp(PL_defoutgv);
1744 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1745 IoFLAGS(io) &= ~IOf_FLUSH;
1747 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1748 PerlIO *ofp = IoOFP(io);
1750 (void)PerlIO_flush(ofp);
1751 IoFLAGS(io) |= IOf_FLUSH;
1757 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1758 PL_multiline = (i != 0);
1761 SvREFCNT_dec(PL_nrs);
1762 PL_nrs = newSVsv(sv);
1763 SvREFCNT_dec(PL_rs);
1764 PL_rs = SvREFCNT_inc(PL_nrs);
1769 if (SvOK(sv) || SvGMAGICAL(sv))
1770 PL_ors = savepv(SvPV(sv,PL_orslen));
1779 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1784 PL_ofmt = savepv(SvPV(sv,PL_na));
1787 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1790 #ifdef COMPLEX_STATUS
1791 if (PL_localizing == 2) {
1792 PL_statusvalue = LvTARGOFF(sv);
1793 PL_statusvalue_vms = LvTARGLEN(sv);
1797 #ifdef VMSISH_STATUS
1799 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1802 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1805 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1806 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1809 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1810 if (PL_delaymagic) {
1811 PL_delaymagic |= DM_RUID;
1812 break; /* don't do magic till later */
1815 (void)setruid((Uid_t)PL_uid);
1818 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1820 #ifdef HAS_SETRESUID
1821 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1823 if (PL_uid == PL_euid) /* special case $< = $> */
1824 (void)PerlProc_setuid(PL_uid);
1826 PL_uid = (I32)PerlProc_getuid();
1827 croak("setruid() not implemented");
1832 PL_uid = (I32)PerlProc_getuid();
1833 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1836 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1837 if (PL_delaymagic) {
1838 PL_delaymagic |= DM_EUID;
1839 break; /* don't do magic till later */
1842 (void)seteuid((Uid_t)PL_euid);
1845 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1847 #ifdef HAS_SETRESUID
1848 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1850 if (PL_euid == PL_uid) /* special case $> = $< */
1851 PerlProc_setuid(PL_euid);
1853 PL_euid = (I32)PerlProc_geteuid();
1854 croak("seteuid() not implemented");
1859 PL_euid = (I32)PerlProc_geteuid();
1860 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1863 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1864 if (PL_delaymagic) {
1865 PL_delaymagic |= DM_RGID;
1866 break; /* don't do magic till later */
1869 (void)setrgid((Gid_t)PL_gid);
1872 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1874 #ifdef HAS_SETRESGID
1875 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1877 if (PL_gid == PL_egid) /* special case $( = $) */
1878 (void)PerlProc_setgid(PL_gid);
1880 PL_gid = (I32)PerlProc_getgid();
1881 croak("setrgid() not implemented");
1886 PL_gid = (I32)PerlProc_getgid();
1887 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1890 #ifdef HAS_SETGROUPS
1892 char *p = SvPV(sv, PL_na);
1893 Groups_t gary[NGROUPS];
1895 SET_NUMERIC_STANDARD();
1898 PL_egid = I_V(atof(p));
1899 for (i = 0; i < NGROUPS; ++i) {
1900 while (*p && !isSPACE(*p))
1906 gary[i] = I_V(atof(p));
1909 (void)setgroups(i, gary);
1911 #else /* HAS_SETGROUPS */
1912 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1913 #endif /* HAS_SETGROUPS */
1914 if (PL_delaymagic) {
1915 PL_delaymagic |= DM_EGID;
1916 break; /* don't do magic till later */
1919 (void)setegid((Gid_t)PL_egid);
1922 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1924 #ifdef HAS_SETRESGID
1925 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1927 if (PL_egid == PL_gid) /* special case $) = $( */
1928 (void)PerlProc_setgid(PL_egid);
1930 PL_egid = (I32)PerlProc_getegid();
1931 croak("setegid() not implemented");
1936 PL_egid = (I32)PerlProc_getegid();
1937 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1940 PL_chopset = SvPV_force(sv,PL_na);
1946 /* See if all the arguments are contiguous in memory */
1947 for (i = 1; i < PL_origargc; i++) {
1948 if (PL_origargv[i] == s + 1
1950 || PL_origargv[i] == s + 2
1955 s += strlen(s); /* this one is ok too */
1960 /* can grab env area too? */
1961 if (PL_origenviron && (PL_origenviron[0] == s + 1
1963 || (PL_origenviron[0] == s + 9 && (s += 8))
1966 my_setenv("NoNe SuCh", Nullch);
1967 /* force copy of environment */
1968 for (i = 0; PL_origenviron[i]; i++)
1969 if (PL_origenviron[i] == s + 1) {
1976 PL_origalen = s - PL_origargv[0];
1978 s = SvPV_force(sv,len);
1980 if (i >= PL_origalen) {
1982 /* don't allow system to limit $0 seen by script */
1983 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1984 Copy(s, PL_origargv[0], i, char);
1985 s = PL_origargv[0]+i;
1989 Copy(s, PL_origargv[0], i, char);
1990 s = PL_origargv[0]+i;
1992 while (++i < PL_origalen)
1994 s = PL_origargv[0]+i;
1995 for (i = 1; i < PL_origargc; i++)
1996 PL_origargv[i] = Nullch;
2001 sv_setsv(thr->errsv, sv);
2003 #endif /* USE_THREADS */
2010 magic_mutexfree(SV *sv, MAGIC *mg)
2013 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
2014 (unsigned long)thr, (unsigned long)sv);)
2016 croak("panic: magic_mutexfree");
2017 MUTEX_DESTROY(MgMUTEXP(mg));
2018 COND_DESTROY(MgCONDP(mg));
2021 #endif /* USE_THREADS */
2026 register char **sigv;
2028 for (sigv = PL_sig_name+1; *sigv; sigv++)
2029 if (strEQ(sig,*sigv))
2030 return PL_sig_num[sigv - PL_sig_name];
2032 if (strEQ(sig,"CHLD"))
2036 if (strEQ(sig,"CLD"))
2045 unwind_handler_stack(void *p)
2048 U32 flags = *(U32*)p;
2051 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2052 /* cxstack_ix-- Not needed, die already unwound it. */
2054 SvREFCNT_dec(sig_sv);
2063 SV *sv, *tSv = PL_Sv;
2067 I32 o_save_i = PL_savestack_ix, type;
2070 if (PL_savestack_ix + 15 <= PL_savestack_max)
2072 if (PL_markstack_ptr < PL_markstack_max - 2)
2074 if (PL_retstack_ix < PL_retstack_max - 2)
2076 if (PL_scopestack_ix < PL_scopestack_max - 3)
2079 if (!PL_psig_ptr[sig])
2080 die("Signal SIG%s received, but no signal handler set.\n",
2083 /* Max number of items pushed there is 3*n or 4. We cannot fix
2084 infinity, so we fix 4 (in fact 5): */
2086 PL_savestack_ix += 5; /* Protect save in progress. */
2087 o_save_i = PL_savestack_ix;
2088 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
2091 PL_markstack_ptr++; /* Protect mark. */
2094 PL_retstack[PL_retstack_ix] = NULL;
2097 PL_scopestack_ix += 1;
2098 /* sv_2cv is too complicated, try a simpler variant first: */
2099 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2100 || SvTYPE(cv) != SVt_PVCV)
2101 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2103 if (!cv || !CvROOT(cv)) {
2104 if (ckWARN(WARN_SIGNAL))
2105 warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2106 PL_sig_name[sig], (gv ? GvENAME(gv)
2113 if(PL_psig_name[sig]) {
2114 sv = SvREFCNT_inc(PL_psig_name[sig]);
2118 sv = sv_newmortal();
2119 sv_setpv(sv,PL_sig_name[sig]);
2122 PUSHSTACKi(PERLSI_SIGNAL);
2127 perl_call_sv((SV*)cv, G_DISCARD);
2132 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2138 PL_scopestack_ix -= 1;
2141 PL_op = myop; /* Apparently not needed... */
2143 PL_Sv = tSv; /* Restore global temporaries. */