3 * Copyright (c) 1991-2000, 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."
19 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
25 static void restore_magic(pTHXo_ void *p);
26 static void unwind_handler_stack(pTHXo_ void *p);
29 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
37 /* MGS is typedef'ed to struct magic_state in perl.h */
40 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
43 assert(SvMAGICAL(sv));
45 SAVEDESTRUCTOR_X(restore_magic, (void*)mgs_ix);
47 mgs = SSPTR(mgs_ix, MGS*);
49 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
50 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
54 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
58 =for apidoc mg_magical
60 Turns on the magical status of an SV. See C<sv_magic>.
66 Perl_mg_magical(pTHX_ SV *sv)
69 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
70 MGVTBL* vtbl = mg->mg_virtual;
72 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
76 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
85 Do magic after a value is retrieved from the SV. See C<sv_magic>.
91 Perl_mg_get(pTHX_ SV *sv)
98 mgs_ix = SSNEW(sizeof(MGS));
99 save_magic(mgs_ix, sv);
102 while ((mg = *mgp) != 0) {
103 MGVTBL* vtbl = mg->mg_virtual;
104 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
105 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
106 /* Ignore this magic if it's been deleted */
107 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
108 (mg->mg_flags & MGf_GSKIP))
109 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
111 /* Advance to next magic (complicated by possible deletion) */
112 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
113 mgp = &mg->mg_moremagic;
117 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
120 restore_magic(aTHXo_ (void*)mgs_ix);
127 Do magic after a value is assigned to the SV. See C<sv_magic>.
133 Perl_mg_set(pTHX_ SV *sv)
139 mgs_ix = SSNEW(sizeof(MGS));
140 save_magic(mgs_ix, sv);
142 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
143 MGVTBL* vtbl = mg->mg_virtual;
144 nextmg = mg->mg_moremagic; /* it may delete itself */
145 if (mg->mg_flags & MGf_GSKIP) {
146 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
147 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
149 if (vtbl && vtbl->svt_set)
150 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
153 restore_magic(aTHXo_ (void*)mgs_ix);
158 =for apidoc mg_length
160 Report on the SV's length. See C<sv_magic>.
166 Perl_mg_length(pTHX_ SV *sv)
172 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
173 MGVTBL* vtbl = mg->mg_virtual;
174 if (vtbl && vtbl->svt_len) {
177 mgs_ix = SSNEW(sizeof(MGS));
178 save_magic(mgs_ix, sv);
179 /* omit MGf_GSKIP -- not changed here */
180 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
181 restore_magic(aTHXo_ (void*)mgs_ix);
186 junk = SvPV(sv, len);
191 Perl_mg_size(pTHX_ SV *sv)
196 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
197 MGVTBL* vtbl = mg->mg_virtual;
198 if (vtbl && vtbl->svt_len) {
201 mgs_ix = SSNEW(sizeof(MGS));
202 save_magic(mgs_ix, sv);
203 /* omit MGf_GSKIP -- not changed here */
204 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
205 restore_magic(aTHXo_ (void*)mgs_ix);
212 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
217 Perl_croak(aTHX_ "Size magic not implemented");
226 Clear something magical that the SV represents. See C<sv_magic>.
232 Perl_mg_clear(pTHX_ SV *sv)
237 mgs_ix = SSNEW(sizeof(MGS));
238 save_magic(mgs_ix, sv);
240 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
241 MGVTBL* vtbl = mg->mg_virtual;
242 /* omit GSKIP -- never set here */
244 if (vtbl && vtbl->svt_clear)
245 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
248 restore_magic(aTHXo_ (void*)mgs_ix);
255 Finds the magic pointer for type matching the SV. See C<sv_magic>.
261 Perl_mg_find(pTHX_ SV *sv, int type)
266 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
267 if (mg->mg_type == type)
276 Copies the magic from one SV to another. See C<sv_magic>.
282 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
286 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
287 if (isUPPER(mg->mg_type)) {
289 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) :
290 (mg->mg_type == 'D' && mg->mg_obj) ? sv : mg->mg_obj,
291 toLOWER(mg->mg_type), key, klen);
301 Free any magic storage used by the SV. See C<sv_magic>.
307 Perl_mg_free(pTHX_ SV *sv)
311 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
312 MGVTBL* vtbl = mg->mg_virtual;
313 moremagic = mg->mg_moremagic;
314 if (vtbl && vtbl->svt_free)
315 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
316 if (mg->mg_ptr && mg->mg_type != 'g')
318 Safefree(mg->mg_ptr);
319 else if (mg->mg_len == HEf_SVKEY)
320 SvREFCNT_dec((SV*)mg->mg_ptr);
321 if (mg->mg_flags & MGf_REFCOUNTED)
322 SvREFCNT_dec(mg->mg_obj);
329 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
334 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
338 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
339 if (mg->mg_obj) /* @+ */
342 return rx->lastparen;
349 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
357 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
361 if (paren <= rx->nparens &&
362 (s = rx->startp[paren]) != -1 &&
363 (t = rx->endp[paren]) != -1)
365 if (mg->mg_obj) /* @+ */
376 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
378 Perl_croak(aTHX_ PL_no_modify);
384 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
391 switch (*mg->mg_ptr) {
392 case '1': case '2': case '3': case '4':
393 case '5': case '6': case '7': case '8': case '9': case '&':
394 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
396 paren = atoi(mg->mg_ptr); /* $& is in [0] */
398 if (paren <= rx->nparens &&
399 (s1 = rx->startp[paren]) != -1 &&
400 (t1 = rx->endp[paren]) != -1)
404 if (i > 0 && DO_UTF8(PL_reg_sv)) {
405 char *s = rx->subbeg + s1;
406 char *send = rx->subbeg + t1;
408 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
411 Perl_croak(aTHX_ "panic: magic_len: %d", i);
417 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
418 paren = rx->lastparen;
424 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
425 if (rx->startp[0] != -1) {
436 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
437 if (rx->endp[0] != -1) {
438 i = rx->sublen - rx->endp[0];
449 if (!SvPOK(sv) && SvNIOK(sv)) {
459 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
466 switch (*mg->mg_ptr) {
467 case '\001': /* ^A */
468 sv_setsv(sv, PL_bodytarget);
470 case '\003': /* ^C */
471 sv_setiv(sv, (IV)PL_minus_c);
474 case '\004': /* ^D */
475 sv_setiv(sv, (IV)(PL_debug & 32767));
476 #if defined(YYDEBUG) && defined(DEBUGGING)
477 PL_yydebug = (PL_debug & 1);
480 case '\005': /* ^E */
481 #ifdef MACOS_TRADITIONAL
485 sv_setnv(sv,(double)gMacPerl_OSErr);
486 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
491 # include <descrip.h>
492 # include <starlet.h>
494 $DESCRIPTOR(msgdsc,msg);
495 sv_setnv(sv,(NV) vaxc$errno);
496 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
497 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
503 if (!(_emx_env & 0x200)) { /* Under DOS */
504 sv_setnv(sv, (NV)errno);
505 sv_setpv(sv, errno ? Strerror(errno) : "");
507 if (errno != errno_isOS2) {
508 int tmp = _syserrno();
509 if (tmp) /* 2nd call to _syserrno() makes it 0 */
512 sv_setnv(sv, (NV)Perl_rc);
513 sv_setpv(sv, os2error(Perl_rc));
518 DWORD dwErr = GetLastError();
519 sv_setnv(sv, (NV)dwErr);
522 PerlProc_GetOSError(sv, dwErr);
529 sv_setnv(sv, (NV)errno);
530 sv_setpv(sv, errno ? Strerror(errno) : "");
535 SvNOK_on(sv); /* what a wonderful hack! */
537 case '\006': /* ^F */
538 sv_setiv(sv, (IV)PL_maxsysfd);
540 case '\010': /* ^H */
541 sv_setiv(sv, (IV)PL_hints);
543 case '\011': /* ^I */ /* NOT \t in EBCDIC */
545 sv_setpv(sv, PL_inplace);
547 sv_setsv(sv, &PL_sv_undef);
549 case '\017': /* ^O & ^OPEN */
550 if (*(mg->mg_ptr+1) == '\0')
551 sv_setpv(sv, PL_osname);
552 else if (strEQ(mg->mg_ptr, "\017PEN")) {
553 if (!PL_compiling.cop_io)
554 sv_setsv(sv, &PL_sv_undef);
556 sv_setsv(sv, PL_compiling.cop_io);
560 case '\020': /* ^P */
561 sv_setiv(sv, (IV)PL_perldb);
563 case '\023': /* ^S */
565 if (PL_lex_state != LEX_NOTPARSING)
568 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
571 case '\024': /* ^T */
573 sv_setnv(sv, PL_basetime);
575 sv_setiv(sv, (IV)PL_basetime);
578 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
579 if (*(mg->mg_ptr+1) == '\0')
580 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
581 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
582 if (PL_compiling.cop_warnings == pWARN_NONE ||
583 PL_compiling.cop_warnings == pWARN_STD)
585 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
587 else if (PL_compiling.cop_warnings == pWARN_ALL) {
588 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
591 sv_setsv(sv, PL_compiling.cop_warnings);
595 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
596 sv_setiv(sv, (IV)PL_widesyscalls);
598 case '1': case '2': case '3': case '4':
599 case '5': case '6': case '7': case '8': case '9': case '&':
600 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
604 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
605 * XXX Does the new way break anything?
607 paren = atoi(mg->mg_ptr); /* $& is in [0] */
609 if (paren <= rx->nparens &&
610 (s1 = rx->startp[paren]) != -1 &&
611 (t1 = rx->endp[paren]) != -1)
622 was_tainted = PL_tainted;
626 if (DO_UTF8(PL_reg_sv))
631 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
636 sv_setsv(sv,&PL_sv_undef);
639 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
640 paren = rx->lastparen;
644 sv_setsv(sv,&PL_sv_undef);
647 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
648 if ((s = rx->subbeg) && rx->startp[0] != -1) {
653 sv_setsv(sv,&PL_sv_undef);
656 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
657 if (rx->subbeg && rx->endp[0] != -1) {
658 s = rx->subbeg + rx->endp[0];
659 i = rx->sublen - rx->endp[0];
663 sv_setsv(sv,&PL_sv_undef);
667 if (GvIO(PL_last_in_gv)) {
668 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
674 sv_setiv(sv, (IV)STATUS_CURRENT);
675 #ifdef COMPLEX_STATUS
676 LvTARGOFF(sv) = PL_statusvalue;
677 LvTARGLEN(sv) = PL_statusvalue_vms;
682 s = IoTOP_NAME(GvIOp(PL_defoutgv));
686 sv_setpv(sv,GvENAME(PL_defoutgv));
691 s = IoFMT_NAME(GvIOp(PL_defoutgv));
693 s = GvENAME(PL_defoutgv);
698 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
701 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
704 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
712 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
715 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
722 sv_setpv(sv,PL_ofmt);
726 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
727 sv_setpv(sv, errno ? Strerror(errno) : "");
730 int saveerrno = errno;
731 sv_setnv(sv, (NV)errno);
733 if (errno == errno_isOS2 || errno == errno_isOS2_set)
734 sv_setpv(sv, os2error(Perl_rc));
737 sv_setpv(sv, errno ? Strerror(errno) : "");
741 SvNOK_on(sv); /* what a wonderful hack! */
744 sv_setiv(sv, (IV)PL_uid);
747 sv_setiv(sv, (IV)PL_euid);
750 sv_setiv(sv, (IV)PL_gid);
752 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
756 sv_setiv(sv, (IV)PL_egid);
758 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
763 Groups_t gary[NGROUPS];
764 i = getgroups(NGROUPS,gary);
766 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
769 (void)SvIOK_on(sv); /* what a wonderful hack! */
773 #ifndef MACOS_TRADITIONAL
779 sv_setsv(sv, thr->errsv);
781 #endif /* USE_THREADS */
787 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
789 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
791 if (uf && uf->uf_val)
792 (*uf->uf_val)(uf->uf_index, sv);
797 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
808 #ifdef DYNAMIC_ENV_FETCH
809 /* We just undefd an environment var. Is a replacement */
810 /* waiting in the wings? */
813 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
814 s = SvPV(*valp, len);
818 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
819 /* And you'll never guess what the dog had */
820 /* in its mouth... */
822 MgTAINTEDDIR_off(mg);
824 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
825 char pathbuf[256], eltbuf[256], *cp, *elt = s;
829 do { /* DCL$PATH may be a search list */
830 while (1) { /* as may dev portion of any element */
831 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
832 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
833 cando_by_name(S_IWUSR,0,elt) ) {
838 if ((cp = strchr(elt, ':')) != Nullch)
840 if (my_trnlnm(elt, eltbuf, j++))
846 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
849 if (s && klen == 4 && strEQ(ptr,"PATH")) {
850 char *strend = s + len;
855 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
858 if (i >= sizeof tmpbuf /* too long -- assume the worst */
860 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
867 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
873 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
876 my_setenv(MgPV(mg,n_a),Nullch);
881 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
884 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
889 magic_clear_all_env(sv,mg);
890 hv_iterinit((HV*)sv);
891 while ((entry = hv_iternext((HV*)sv))) {
893 my_setenv(hv_iterkey(entry, &keylen),
894 SvPV(hv_iterval((HV*)sv, entry), n_a));
902 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
904 #if defined(VMS) || defined(EPOC)
905 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
907 # ifdef PERL_IMPLICIT_SYS
911 char *envv = GetEnvironmentStrings();
915 char *end = strchr(cur,'=');
916 if (end && end != cur) {
918 my_setenv(cur,Nullch);
920 cur = end + strlen(end+1)+2;
922 else if ((len = strlen(cur)))
925 FreeEnvironmentStrings(envv);
927 # ifndef PERL_USE_SAFE_PUTENV
930 if (environ == PL_origenviron)
931 environ = (char**)safesysmalloc(sizeof(char*));
933 for (i = 0; environ[i]; i++)
934 safesysfree(environ[i]);
935 # endif /* PERL_USE_SAFE_PUTENV */
940 # endif /* PERL_IMPLICIT_SYS */
947 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
951 /* Are we fetching a signal entry? */
952 i = whichsig(MgPV(mg,n_a));
955 sv_setsv(sv,PL_psig_ptr[i]);
957 Sighandler_t sigstate = rsignal_state(i);
959 /* cache state so we don't fetch it again */
960 if(sigstate == SIG_IGN)
961 sv_setpv(sv,"IGNORE");
963 sv_setsv(sv,&PL_sv_undef);
964 PL_psig_ptr[i] = SvREFCNT_inc(sv);
971 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
975 /* Are we clearing a signal entry? */
976 i = whichsig(MgPV(mg,n_a));
979 SvREFCNT_dec(PL_psig_ptr[i]);
982 if(PL_psig_name[i]) {
983 SvREFCNT_dec(PL_psig_name[i]);
991 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1000 if (strEQ(s,"__DIE__"))
1002 else if (strEQ(s,"__WARN__"))
1005 Perl_croak(aTHX_ "No such hook: %s", s);
1013 i = whichsig(s); /* ...no, a brick */
1015 if (ckWARN(WARN_SIGNAL))
1016 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1019 SvREFCNT_dec(PL_psig_name[i]);
1020 SvREFCNT_dec(PL_psig_ptr[i]);
1021 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1022 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1023 PL_psig_name[i] = newSVpvn(s, len);
1024 SvREADONLY_on(PL_psig_name[i]);
1026 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1028 (void)rsignal(i, PL_sighandlerp);
1030 *svp = SvREFCNT_inc(sv);
1033 s = SvPV_force(sv,len);
1034 if (strEQ(s,"IGNORE")) {
1036 (void)rsignal(i, SIG_IGN);
1040 else if (strEQ(s,"DEFAULT") || !*s) {
1042 (void)rsignal(i, SIG_DFL);
1048 * We should warn if HINT_STRICT_REFS, but without
1049 * access to a known hint bit in a known OP, we can't
1050 * tell whether HINT_STRICT_REFS is in force or not.
1052 if (!strchr(s,':') && !strchr(s,'\''))
1053 sv_insert(sv, 0, 0, "main::", 6);
1055 (void)rsignal(i, PL_sighandlerp);
1057 *svp = SvREFCNT_inc(sv);
1061 #endif /* !PERL_MICRO */
1064 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1066 PL_sub_generation++;
1071 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1073 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1074 PL_amagic_generation++;
1080 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1082 HV *hv = (HV*)LvTARG(sv);
1087 (void) hv_iterinit(hv);
1088 if (! SvTIED_mg((SV*)hv, 'P'))
1092 while ((entry = hv_iternext(hv))) {
1098 sv_setiv(sv, (IV)i);
1103 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1106 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1111 /* caller is responsible for stack switching/cleanup */
1113 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1119 PUSHs(SvTIED_obj(sv, mg));
1122 if (mg->mg_len >= 0)
1123 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1124 else if (mg->mg_len == HEf_SVKEY)
1125 PUSHs((SV*)mg->mg_ptr);
1127 else if (mg->mg_type == 'p') {
1128 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1136 return call_method(meth, flags);
1140 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1146 PUSHSTACKi(PERLSI_MAGIC);
1148 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1149 sv_setsv(sv, *PL_stack_sp--);
1159 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1161 magic_methpack(sv,mg,"FETCH");
1163 mg->mg_flags |= MGf_GSKIP;
1168 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1172 PUSHSTACKi(PERLSI_MAGIC);
1173 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1180 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1182 return magic_methpack(sv,mg,"DELETE");
1187 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1194 PUSHSTACKi(PERLSI_MAGIC);
1195 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1196 sv = *PL_stack_sp--;
1197 retval = (U32) SvIV(sv)-1;
1206 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1211 PUSHSTACKi(PERLSI_MAGIC);
1213 XPUSHs(SvTIED_obj(sv, mg));
1215 call_method("CLEAR", G_SCALAR|G_DISCARD);
1222 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1225 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1229 PUSHSTACKi(PERLSI_MAGIC);
1232 PUSHs(SvTIED_obj(sv, mg));
1237 if (call_method(meth, G_SCALAR))
1238 sv_setsv(key, *PL_stack_sp--);
1247 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1249 return magic_methpack(sv,mg,"EXISTS");
1253 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1263 svp = av_fetch(GvAV(gv),
1264 atoi(MgPV(mg,n_a)), FALSE);
1265 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1271 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1273 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1278 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1280 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1285 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1287 SV* lsv = LvTARG(sv);
1289 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1290 mg = mg_find(lsv, 'g');
1291 if (mg && mg->mg_len >= 0) {
1294 sv_pos_b2u(lsv, &i);
1295 sv_setiv(sv, i + PL_curcop->cop_arybase);
1304 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1306 SV* lsv = LvTARG(sv);
1313 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1314 mg = mg_find(lsv, 'g');
1318 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1319 mg = mg_find(lsv, 'g');
1321 else if (!SvOK(sv)) {
1325 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1327 pos = SvIV(sv) - PL_curcop->cop_arybase;
1330 ulen = sv_len_utf8(lsv);
1345 sv_pos_u2b(lsv, &p, 0);
1350 mg->mg_flags &= ~MGf_MINMATCH;
1356 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1358 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1360 gv_efullname3(sv,((GV*)sv), "*");
1364 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1369 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1378 if (*s == '*' && s[1])
1380 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1385 GvGP(sv) = gp_ref(GvGP(gv));
1390 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1393 SV *lsv = LvTARG(sv);
1394 char *tmps = SvPV(lsv,len);
1395 I32 offs = LvTARGOFF(sv);
1396 I32 rem = LvTARGLEN(sv);
1400 if (rem + offs > len)
1402 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1409 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1412 char *tmps = SvPV(sv,len);
1413 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1418 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1420 TAINT_IF((mg->mg_len & 1) ||
1421 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1426 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1428 if (PL_localizing) {
1429 if (PL_localizing == 1)
1434 else if (PL_tainted)
1442 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1444 SV *lsv = LvTARG(sv);
1451 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1456 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1458 do_vecset(sv); /* XXX slurp this routine */
1463 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1466 if (LvTARGLEN(sv)) {
1468 SV *ahv = LvTARG(sv);
1469 if (SvTYPE(ahv) == SVt_PVHV) {
1470 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1475 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1481 AV* av = (AV*)LvTARG(sv);
1482 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1483 targ = AvARRAY(av)[LvTARGOFF(sv)];
1485 if (targ && targ != &PL_sv_undef) {
1486 /* somebody else defined it for us */
1487 SvREFCNT_dec(LvTARG(sv));
1488 LvTARG(sv) = SvREFCNT_inc(targ);
1490 SvREFCNT_dec(mg->mg_obj);
1491 mg->mg_obj = Nullsv;
1492 mg->mg_flags &= ~MGf_REFCOUNTED;
1497 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1502 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1507 sv_setsv(LvTARG(sv), sv);
1508 SvSETMAGIC(LvTARG(sv));
1514 Perl_vivify_defelem(pTHX_ SV *sv)
1519 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1522 SV *ahv = LvTARG(sv);
1524 if (SvTYPE(ahv) == SVt_PVHV) {
1525 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1530 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1534 if (!value || value == &PL_sv_undef)
1535 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1538 AV* av = (AV*)LvTARG(sv);
1539 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1540 LvTARG(sv) = Nullsv; /* array can't be extended */
1542 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1543 if (!svp || (value = *svp) == &PL_sv_undef)
1544 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1547 (void)SvREFCNT_inc(value);
1548 SvREFCNT_dec(LvTARG(sv));
1551 SvREFCNT_dec(mg->mg_obj);
1552 mg->mg_obj = Nullsv;
1553 mg->mg_flags &= ~MGf_REFCOUNTED;
1557 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1559 AV *av = (AV*)mg->mg_obj;
1560 SV **svp = AvARRAY(av);
1561 I32 i = AvFILLp(av);
1563 if (svp[i] && svp[i] != &PL_sv_undef) {
1564 if (!SvWEAKREF(svp[i]))
1565 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1566 /* XXX Should we check that it hasn't changed? */
1568 (void)SvOK_off(svp[i]);
1569 SvWEAKREF_off(svp[i]);
1570 svp[i] = &PL_sv_undef;
1578 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1586 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1588 sv_unmagic(sv, 'B');
1594 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1596 sv_unmagic(sv, 'f');
1602 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1604 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1606 if (uf && uf->uf_set)
1607 (*uf->uf_set)(uf->uf_index, sv);
1612 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1614 regexp *re = (regexp *)mg->mg_obj;
1619 #ifdef USE_LOCALE_COLLATE
1621 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1624 * RenE<eacute> Descartes said "I think not."
1625 * and vanished with a faint plop.
1628 Safefree(mg->mg_ptr);
1634 #endif /* USE_LOCALE_COLLATE */
1637 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1642 switch (*mg->mg_ptr) {
1643 case '\001': /* ^A */
1644 sv_setsv(PL_bodytarget, sv);
1646 case '\003': /* ^C */
1647 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1650 case '\004': /* ^D */
1651 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1652 DEBUG_x(dump_all());
1654 case '\005': /* ^E */
1655 #ifdef MACOS_TRADITIONAL
1656 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1659 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1662 SetLastError( SvIV(sv) );
1665 /* will anyone ever use this? */
1666 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1672 case '\006': /* ^F */
1673 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1675 case '\010': /* ^H */
1676 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1678 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1680 Safefree(PL_inplace);
1682 PL_inplace = savepv(SvPV(sv,len));
1684 PL_inplace = Nullch;
1686 case '\017': /* ^O */
1687 if (*(mg->mg_ptr+1) == '\0') {
1689 Safefree(PL_osname);
1691 PL_osname = savepv(SvPV(sv,len));
1695 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1696 if (!PL_compiling.cop_io)
1697 PL_compiling.cop_io = newSVsv(sv);
1699 sv_setsv(PL_compiling.cop_io,sv);
1702 case '\020': /* ^P */
1703 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1704 if (PL_perldb && !PL_DBsingle)
1707 case '\024': /* ^T */
1709 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1711 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1714 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1715 if (*(mg->mg_ptr+1) == '\0') {
1716 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1717 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1718 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1719 | (i ? G_WARN_ON : G_WARN_OFF) ;
1722 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1723 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1724 if (!SvPOK(sv) && PL_localizing) {
1725 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1726 PL_compiling.cop_warnings = pWARN_NONE;
1731 int accumulate = 0 ;
1732 int any_fatals = 0 ;
1733 char * ptr = (char*)SvPV(sv, len) ;
1734 for (i = 0 ; i < len ; ++i) {
1735 accumulate |= ptr[i] ;
1736 any_fatals |= (ptr[i] & 0xAA) ;
1739 PL_compiling.cop_warnings = pWARN_NONE;
1740 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1741 PL_compiling.cop_warnings = pWARN_ALL;
1742 PL_dowarn |= G_WARN_ONCE ;
1745 if (specialWARN(PL_compiling.cop_warnings))
1746 PL_compiling.cop_warnings = newSVsv(sv) ;
1748 sv_setsv(PL_compiling.cop_warnings, sv);
1749 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1750 PL_dowarn |= G_WARN_ONCE ;
1756 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1757 PL_widesyscalls = SvTRUE(sv);
1760 if (PL_localizing) {
1761 if (PL_localizing == 1)
1762 SAVESPTR(PL_last_in_gv);
1764 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1765 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1768 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1769 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1770 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1773 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1774 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1775 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1778 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1781 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1782 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1783 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1786 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1790 IO *io = GvIOp(PL_defoutgv);
1791 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1792 IoFLAGS(io) &= ~IOf_FLUSH;
1794 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1795 PerlIO *ofp = IoOFP(io);
1797 (void)PerlIO_flush(ofp);
1798 IoFLAGS(io) |= IOf_FLUSH;
1804 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1805 PL_multiline = (i != 0);
1808 SvREFCNT_dec(PL_nrs);
1809 PL_nrs = newSVsv(sv);
1810 SvREFCNT_dec(PL_rs);
1811 PL_rs = SvREFCNT_inc(PL_nrs);
1815 SvREFCNT_dec(PL_ors_sv);
1816 if (SvOK(sv) || SvGMAGICAL(sv)) {
1817 PL_ors_sv = newSVsv(sv);
1825 SvREFCNT_dec(PL_ofs_sv);
1826 if (SvOK(sv) || SvGMAGICAL(sv)) {
1827 PL_ofs_sv = newSVsv(sv);
1836 PL_ofmt = savepv(SvPV(sv,len));
1839 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1842 #ifdef COMPLEX_STATUS
1843 if (PL_localizing == 2) {
1844 PL_statusvalue = LvTARGOFF(sv);
1845 PL_statusvalue_vms = LvTARGLEN(sv);
1849 #ifdef VMSISH_STATUS
1851 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1854 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1857 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1858 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1861 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1862 if (PL_delaymagic) {
1863 PL_delaymagic |= DM_RUID;
1864 break; /* don't do magic till later */
1867 (void)setruid((Uid_t)PL_uid);
1870 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1872 #ifdef HAS_SETRESUID
1873 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1875 if (PL_uid == PL_euid) /* special case $< = $> */
1876 (void)PerlProc_setuid(PL_uid);
1878 PL_uid = PerlProc_getuid();
1879 Perl_croak(aTHX_ "setruid() not implemented");
1884 PL_uid = PerlProc_getuid();
1885 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1888 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1889 if (PL_delaymagic) {
1890 PL_delaymagic |= DM_EUID;
1891 break; /* don't do magic till later */
1894 (void)seteuid((Uid_t)PL_euid);
1897 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1899 #ifdef HAS_SETRESUID
1900 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1902 if (PL_euid == PL_uid) /* special case $> = $< */
1903 PerlProc_setuid(PL_euid);
1905 PL_euid = PerlProc_geteuid();
1906 Perl_croak(aTHX_ "seteuid() not implemented");
1911 PL_euid = PerlProc_geteuid();
1912 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1915 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1916 if (PL_delaymagic) {
1917 PL_delaymagic |= DM_RGID;
1918 break; /* don't do magic till later */
1921 (void)setrgid((Gid_t)PL_gid);
1924 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1926 #ifdef HAS_SETRESGID
1927 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1929 if (PL_gid == PL_egid) /* special case $( = $) */
1930 (void)PerlProc_setgid(PL_gid);
1932 PL_gid = PerlProc_getgid();
1933 Perl_croak(aTHX_ "setrgid() not implemented");
1938 PL_gid = PerlProc_getgid();
1939 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1942 #ifdef HAS_SETGROUPS
1944 char *p = SvPV(sv, len);
1945 Groups_t gary[NGROUPS];
1950 for (i = 0; i < NGROUPS; ++i) {
1951 while (*p && !isSPACE(*p))
1960 (void)setgroups(i, gary);
1962 #else /* HAS_SETGROUPS */
1963 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1964 #endif /* HAS_SETGROUPS */
1965 if (PL_delaymagic) {
1966 PL_delaymagic |= DM_EGID;
1967 break; /* don't do magic till later */
1970 (void)setegid((Gid_t)PL_egid);
1973 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1975 #ifdef HAS_SETRESGID
1976 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1978 if (PL_egid == PL_gid) /* special case $) = $( */
1979 (void)PerlProc_setgid(PL_egid);
1981 PL_egid = PerlProc_getegid();
1982 Perl_croak(aTHX_ "setegid() not implemented");
1987 PL_egid = PerlProc_getegid();
1988 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1991 PL_chopset = SvPV_force(sv,len);
1993 #ifndef MACOS_TRADITIONAL
1995 #ifdef HAS_SETPROCTITLE
1996 /* The BSDs don't show the argv[] in ps(1) output, they
1997 * show a string from the process struct and provide
1998 * the setproctitle() routine to manipulate that. */
2001 # if __FreeBSD_version >= 410001
2002 /* The leading "-" removes the "perl: " prefix,
2003 * but not the "(perl) suffix from the ps(1)
2004 * output, because that's what ps(1) shows if the
2005 * argv[] is modified. */
2006 setproctitle("-%s", s, len + 1);
2007 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2008 /* This doesn't really work if you assume that
2009 * $0 = 'foobar'; will wipe out 'perl' from the $0
2010 * because in ps(1) output the result will be like
2011 * sprintf("perl: %s (perl)", s)
2012 * I guess this is a security feature:
2013 * one (a user process) cannot get rid of the original name.
2015 setproctitle("%s", s);
2022 /* See if all the arguments are contiguous in memory */
2023 for (i = 1; i < PL_origargc; i++) {
2024 if (PL_origargv[i] == s + 1
2026 || PL_origargv[i] == s + 2
2031 s += strlen(s); /* this one is ok too */
2036 /* can grab env area too? */
2037 if (PL_origenviron && (PL_origenviron[0] == s + 1
2039 || (PL_origenviron[0] == s + 9 && (s += 8))
2042 my_setenv("NoNe SuCh", Nullch);
2043 /* force copy of environment */
2044 for (i = 0; PL_origenviron[i]; i++)
2045 if (PL_origenviron[i] == s + 1) {
2052 PL_origalen = s - PL_origargv[0];
2054 s = SvPV_force(sv,len);
2056 if (i >= PL_origalen) {
2058 /* don't allow system to limit $0 seen by script */
2059 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2060 Copy(s, PL_origargv[0], i, char);
2061 s = PL_origargv[0]+i;
2065 Copy(s, PL_origargv[0], i, char);
2066 s = PL_origargv[0]+i;
2068 while (++i < PL_origalen)
2070 s = PL_origargv[0]+i;
2071 for (i = 1; i < PL_origargc; i++)
2072 PL_origargv[i] = Nullch;
2078 sv_setsv(thr->errsv, sv);
2080 #endif /* USE_THREADS */
2087 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2089 DEBUG_S(PerlIO_printf(Perl_debug_log,
2090 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2091 PTR2UV(thr), PTR2UV(sv));)
2093 Perl_croak(aTHX_ "panic: magic_mutexfree");
2094 MUTEX_DESTROY(MgMUTEXP(mg));
2095 COND_DESTROY(MgCONDP(mg));
2098 #endif /* USE_THREADS */
2101 Perl_whichsig(pTHX_ char *sig)
2103 register char **sigv;
2105 for (sigv = PL_sig_name+1; *sigv; sigv++)
2106 if (strEQ(sig,*sigv))
2107 return PL_sig_num[sigv - PL_sig_name];
2109 if (strEQ(sig,"CHLD"))
2113 if (strEQ(sig,"CLD"))
2122 Perl_sighandler(int sig)
2124 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2125 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2132 SV *sv, *tSv = PL_Sv;
2136 I32 o_save_i = PL_savestack_ix;
2139 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2140 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2143 if (PL_savestack_ix + 15 <= PL_savestack_max)
2145 if (PL_markstack_ptr < PL_markstack_max - 2)
2147 if (PL_retstack_ix < PL_retstack_max - 2)
2149 if (PL_scopestack_ix < PL_scopestack_max - 3)
2152 if (!PL_psig_ptr[sig])
2153 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2156 /* Max number of items pushed there is 3*n or 4. We cannot fix
2157 infinity, so we fix 4 (in fact 5): */
2159 PL_savestack_ix += 5; /* Protect save in progress. */
2160 o_save_i = PL_savestack_ix;
2161 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2164 PL_markstack_ptr++; /* Protect mark. */
2167 PL_retstack[PL_retstack_ix] = NULL;
2170 PL_scopestack_ix += 1;
2171 /* sv_2cv is too complicated, try a simpler variant first: */
2172 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2173 || SvTYPE(cv) != SVt_PVCV)
2174 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2176 if (!cv || !CvROOT(cv)) {
2177 if (ckWARN(WARN_SIGNAL))
2178 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2179 PL_sig_name[sig], (gv ? GvENAME(gv)
2186 if(PL_psig_name[sig]) {
2187 sv = SvREFCNT_inc(PL_psig_name[sig]);
2191 sv = sv_newmortal();
2192 sv_setpv(sv,PL_sig_name[sig]);
2195 PUSHSTACKi(PERLSI_SIGNAL);
2200 call_sv((SV*)cv, G_DISCARD);
2205 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2211 PL_scopestack_ix -= 1;
2214 PL_op = myop; /* Apparently not needed... */
2216 PL_Sv = tSv; /* Restore global temporaries. */
2227 restore_magic(pTHXo_ void *p)
2229 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2230 SV* sv = mgs->mgs_sv;
2235 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2238 SvFLAGS(sv) |= mgs->mgs_flags;
2242 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2245 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2247 /* If we're still on top of the stack, pop us off. (That condition
2248 * will be satisfied if restore_magic was called explicitly, but *not*
2249 * if it's being called via leave_scope.)
2250 * The reason for doing this is that otherwise, things like sv_2cv()
2251 * may leave alloc gunk on the savestack, and some code
2252 * (e.g. sighandler) doesn't expect that...
2254 if (PL_savestack_ix == mgs->mgs_ss_ix)
2256 I32 popval = SSPOPINT;
2257 assert(popval == SAVEt_DESTRUCTOR_X);
2258 PL_savestack_ix -= 2;
2260 assert(popval == SAVEt_ALLOC);
2262 PL_savestack_ix -= popval;
2268 unwind_handler_stack(pTHXo_ void *p)
2270 U32 flags = *(U32*)p;
2273 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2274 /* cxstack_ix-- Not needed, die already unwound it. */
2276 SvREFCNT_dec(sig_sv);