3 * Copyright (c) 1991-2001, 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);
322 if (mg->mg_flags & MGf_REFCOUNTED)
323 SvREFCNT_dec(mg->mg_obj);
331 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
336 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
340 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
341 if (mg->mg_obj) /* @+ */
344 return rx->lastparen;
351 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
359 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
363 if (paren <= rx->nparens &&
364 (s = rx->startp[paren]) != -1 &&
365 (t = rx->endp[paren]) != -1)
367 if (mg->mg_obj) /* @+ */
372 if (i > 0 && DO_UTF8(PL_reg_sv)) {
373 char *b = rx->subbeg;
374 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
383 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
385 Perl_croak(aTHX_ PL_no_modify);
391 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
398 switch (*mg->mg_ptr) {
399 case '1': case '2': case '3': case '4':
400 case '5': case '6': case '7': case '8': case '9': case '&':
401 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
403 paren = atoi(mg->mg_ptr); /* $& is in [0] */
405 if (paren <= rx->nparens &&
406 (s1 = rx->startp[paren]) != -1 &&
407 (t1 = rx->endp[paren]) != -1)
411 if (i > 0 && DO_UTF8(PL_reg_sv)) {
412 char *s = rx->subbeg + s1;
413 char *send = rx->subbeg + t1;
416 if (is_utf8_string((U8*)s, i))
417 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
420 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
426 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
427 paren = rx->lastparen;
433 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
434 if (rx->startp[0] != -1) {
445 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
446 if (rx->endp[0] != -1) {
447 i = rx->sublen - rx->endp[0];
458 if (!SvPOK(sv) && SvNIOK(sv)) {
468 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
475 switch (*mg->mg_ptr) {
476 case '\001': /* ^A */
477 sv_setsv(sv, PL_bodytarget);
479 case '\003': /* ^C */
480 sv_setiv(sv, (IV)PL_minus_c);
483 case '\004': /* ^D */
484 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
485 #if defined(YYDEBUG) && defined(DEBUGGING)
486 PL_yydebug = DEBUG_p_TEST;
489 case '\005': /* ^E */
490 #ifdef MACOS_TRADITIONAL
494 sv_setnv(sv,(double)gMacPerl_OSErr);
495 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
500 # include <descrip.h>
501 # include <starlet.h>
503 $DESCRIPTOR(msgdsc,msg);
504 sv_setnv(sv,(NV) vaxc$errno);
505 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
506 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
512 if (!(_emx_env & 0x200)) { /* Under DOS */
513 sv_setnv(sv, (NV)errno);
514 sv_setpv(sv, errno ? Strerror(errno) : "");
516 if (errno != errno_isOS2) {
517 int tmp = _syserrno();
518 if (tmp) /* 2nd call to _syserrno() makes it 0 */
521 sv_setnv(sv, (NV)Perl_rc);
522 sv_setpv(sv, os2error(Perl_rc));
527 DWORD dwErr = GetLastError();
528 sv_setnv(sv, (NV)dwErr);
531 PerlProc_GetOSError(sv, dwErr);
538 sv_setnv(sv, (NV)errno);
539 sv_setpv(sv, errno ? Strerror(errno) : "");
544 SvNOK_on(sv); /* what a wonderful hack! */
546 case '\006': /* ^F */
547 sv_setiv(sv, (IV)PL_maxsysfd);
549 case '\010': /* ^H */
550 sv_setiv(sv, (IV)PL_hints);
552 case '\011': /* ^I */ /* NOT \t in EBCDIC */
554 sv_setpv(sv, PL_inplace);
556 sv_setsv(sv, &PL_sv_undef);
558 case '\017': /* ^O & ^OPEN */
559 if (*(mg->mg_ptr+1) == '\0')
560 sv_setpv(sv, PL_osname);
561 else if (strEQ(mg->mg_ptr, "\017PEN")) {
562 if (!PL_compiling.cop_io)
563 sv_setsv(sv, &PL_sv_undef);
565 sv_setsv(sv, PL_compiling.cop_io);
569 case '\020': /* ^P */
570 sv_setiv(sv, (IV)PL_perldb);
572 case '\023': /* ^S */
574 if (PL_lex_state != LEX_NOTPARSING)
577 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
580 case '\024': /* ^T */
582 sv_setnv(sv, PL_basetime);
584 sv_setiv(sv, (IV)PL_basetime);
587 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
588 if (*(mg->mg_ptr+1) == '\0')
589 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
590 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
591 if (PL_compiling.cop_warnings == pWARN_NONE ||
592 PL_compiling.cop_warnings == pWARN_STD)
594 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
596 else if (PL_compiling.cop_warnings == pWARN_ALL) {
597 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
600 sv_setsv(sv, PL_compiling.cop_warnings);
604 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
605 sv_setiv(sv, (IV)PL_widesyscalls);
607 case '1': case '2': case '3': case '4':
608 case '5': case '6': case '7': case '8': case '9': case '&':
609 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
613 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
614 * XXX Does the new way break anything?
616 paren = atoi(mg->mg_ptr); /* $& is in [0] */
618 if (paren <= rx->nparens &&
619 (s1 = rx->startp[paren]) != -1 &&
620 (t1 = rx->endp[paren]) != -1)
631 was_tainted = PL_tainted;
635 if (DO_UTF8(PL_reg_sv) && is_utf8_string((U8*)s, i))
640 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
645 sv_setsv(sv,&PL_sv_undef);
648 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
649 paren = rx->lastparen;
653 sv_setsv(sv,&PL_sv_undef);
656 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
657 if ((s = rx->subbeg) && rx->startp[0] != -1) {
662 sv_setsv(sv,&PL_sv_undef);
665 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
666 if (rx->subbeg && rx->endp[0] != -1) {
667 s = rx->subbeg + rx->endp[0];
668 i = rx->sublen - rx->endp[0];
672 sv_setsv(sv,&PL_sv_undef);
676 if (GvIO(PL_last_in_gv)) {
677 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
683 sv_setiv(sv, (IV)STATUS_CURRENT);
684 #ifdef COMPLEX_STATUS
685 LvTARGOFF(sv) = PL_statusvalue;
686 LvTARGLEN(sv) = PL_statusvalue_vms;
691 s = IoTOP_NAME(GvIOp(PL_defoutgv));
695 sv_setpv(sv,GvENAME(PL_defoutgv));
700 s = IoFMT_NAME(GvIOp(PL_defoutgv));
702 s = GvENAME(PL_defoutgv);
707 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
710 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
713 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
721 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
724 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
731 sv_setpv(sv,PL_ofmt);
735 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
736 sv_setpv(sv, errno ? Strerror(errno) : "");
739 int saveerrno = errno;
740 sv_setnv(sv, (NV)errno);
742 if (errno == errno_isOS2 || errno == errno_isOS2_set)
743 sv_setpv(sv, os2error(Perl_rc));
746 sv_setpv(sv, errno ? Strerror(errno) : "");
750 SvNOK_on(sv); /* what a wonderful hack! */
753 sv_setiv(sv, (IV)PL_uid);
756 sv_setiv(sv, (IV)PL_euid);
759 sv_setiv(sv, (IV)PL_gid);
761 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
765 sv_setiv(sv, (IV)PL_egid);
767 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
772 Groups_t gary[NGROUPS];
773 i = getgroups(NGROUPS,gary);
775 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
778 (void)SvIOK_on(sv); /* what a wonderful hack! */
782 #ifndef MACOS_TRADITIONAL
788 sv_setsv(sv, thr->errsv);
790 #endif /* USE_THREADS */
796 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
798 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
800 if (uf && uf->uf_val)
801 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
806 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
817 #ifdef DYNAMIC_ENV_FETCH
818 /* We just undefd an environment var. Is a replacement */
819 /* waiting in the wings? */
822 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
823 s = SvPV(*valp, len);
827 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
828 /* And you'll never guess what the dog had */
829 /* in its mouth... */
831 MgTAINTEDDIR_off(mg);
833 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
834 char pathbuf[256], eltbuf[256], *cp, *elt = s;
838 do { /* DCL$PATH may be a search list */
839 while (1) { /* as may dev portion of any element */
840 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
841 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
842 cando_by_name(S_IWUSR,0,elt) ) {
847 if ((cp = strchr(elt, ':')) != Nullch)
849 if (my_trnlnm(elt, eltbuf, j++))
855 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
858 if (s && klen == 4 && strEQ(ptr,"PATH")) {
859 char *strend = s + len;
864 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
867 if (i >= sizeof tmpbuf /* too long -- assume the worst */
869 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
876 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
882 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
885 my_setenv(MgPV(mg,n_a),Nullch);
890 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
893 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
898 magic_clear_all_env(sv,mg);
899 hv_iterinit((HV*)sv);
900 while ((entry = hv_iternext((HV*)sv))) {
902 my_setenv(hv_iterkey(entry, &keylen),
903 SvPV(hv_iterval((HV*)sv, entry), n_a));
911 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
913 #if defined(VMS) || defined(EPOC)
914 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
916 # ifdef PERL_IMPLICIT_SYS
920 char *envv = GetEnvironmentStrings();
924 char *end = strchr(cur,'=');
925 if (end && end != cur) {
927 my_setenv(cur,Nullch);
929 cur = end + strlen(end+1)+2;
931 else if ((len = strlen(cur)))
934 FreeEnvironmentStrings(envv);
936 #ifdef USE_ENVIRON_ARRAY
937 # ifndef PERL_USE_SAFE_PUTENV
940 if (environ == PL_origenviron)
941 environ = (char**)safesysmalloc(sizeof(char*));
943 for (i = 0; environ[i]; i++)
944 safesysfree(environ[i]);
945 # endif /* PERL_USE_SAFE_PUTENV */
949 #endif /* USE_ENVIRON_ARRAY */
951 # endif /* PERL_IMPLICIT_SYS */
958 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
962 /* Are we fetching a signal entry? */
963 i = whichsig(MgPV(mg,n_a));
966 sv_setsv(sv,PL_psig_ptr[i]);
968 Sighandler_t sigstate = rsignal_state(i);
970 /* cache state so we don't fetch it again */
971 if(sigstate == SIG_IGN)
972 sv_setpv(sv,"IGNORE");
974 sv_setsv(sv,&PL_sv_undef);
975 PL_psig_ptr[i] = SvREFCNT_inc(sv);
982 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
986 /* Are we clearing a signal entry? */
987 i = whichsig(MgPV(mg,n_a));
990 SvREFCNT_dec(PL_psig_ptr[i]);
993 if(PL_psig_name[i]) {
994 SvREFCNT_dec(PL_psig_name[i]);
1002 Perl_raise_signal(pTHX_ int sig)
1004 /* Set a flag to say this signal is pending */
1005 PL_psig_pend[sig]++;
1006 /* And one to say _a_ signal is pending */
1011 Perl_csighandler(int sig)
1013 #ifdef PERL_OLD_SIGNALS
1014 /* Call the perl level handler now with risk we may be in malloc() etc. */
1015 (*PL_sighandlerp)(sig);
1018 Perl_raise_signal(aTHX_ sig);
1023 Perl_despatch_signals(pTHX)
1027 for (sig = 1; sig < SIG_SIZE; sig++) {
1028 if (PL_psig_pend[sig]) {
1029 PL_psig_pend[sig] = 0;
1030 (*PL_sighandlerp)(sig);
1036 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1045 if (strEQ(s,"__DIE__"))
1047 else if (strEQ(s,"__WARN__"))
1050 Perl_croak(aTHX_ "No such hook: %s", s);
1058 i = whichsig(s); /* ...no, a brick */
1060 if (ckWARN(WARN_SIGNAL))
1061 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1064 SvREFCNT_dec(PL_psig_name[i]);
1065 SvREFCNT_dec(PL_psig_ptr[i]);
1066 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1067 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1068 PL_psig_name[i] = newSVpvn(s, len);
1069 SvREADONLY_on(PL_psig_name[i]);
1071 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1073 (void)rsignal(i, &Perl_csighandler);
1075 *svp = SvREFCNT_inc(sv);
1078 s = SvPV_force(sv,len);
1079 if (strEQ(s,"IGNORE")) {
1081 (void)rsignal(i, SIG_IGN);
1085 else if (strEQ(s,"DEFAULT") || !*s) {
1087 (void)rsignal(i, SIG_DFL);
1093 * We should warn if HINT_STRICT_REFS, but without
1094 * access to a known hint bit in a known OP, we can't
1095 * tell whether HINT_STRICT_REFS is in force or not.
1097 if (!strchr(s,':') && !strchr(s,'\''))
1098 sv_insert(sv, 0, 0, "main::", 6);
1100 (void)rsignal(i, &Perl_csighandler);
1102 *svp = SvREFCNT_inc(sv);
1106 #endif /* !PERL_MICRO */
1109 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1111 PL_sub_generation++;
1116 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1118 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1119 PL_amagic_generation++;
1125 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1127 HV *hv = (HV*)LvTARG(sv);
1132 (void) hv_iterinit(hv);
1133 if (! SvTIED_mg((SV*)hv, 'P'))
1137 while ((entry = hv_iternext(hv))) {
1143 sv_setiv(sv, (IV)i);
1148 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1151 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1156 /* caller is responsible for stack switching/cleanup */
1158 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1164 PUSHs(SvTIED_obj(sv, mg));
1167 if (mg->mg_len >= 0)
1168 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1169 else if (mg->mg_len == HEf_SVKEY)
1170 PUSHs((SV*)mg->mg_ptr);
1172 else if (mg->mg_type == 'p') {
1173 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1181 return call_method(meth, flags);
1185 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1191 PUSHSTACKi(PERLSI_MAGIC);
1193 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1194 sv_setsv(sv, *PL_stack_sp--);
1204 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1206 magic_methpack(sv,mg,"FETCH");
1208 mg->mg_flags |= MGf_GSKIP;
1213 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1217 PUSHSTACKi(PERLSI_MAGIC);
1218 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1225 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1227 return magic_methpack(sv,mg,"DELETE");
1232 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1239 PUSHSTACKi(PERLSI_MAGIC);
1240 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1241 sv = *PL_stack_sp--;
1242 retval = (U32) SvIV(sv)-1;
1251 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1256 PUSHSTACKi(PERLSI_MAGIC);
1258 XPUSHs(SvTIED_obj(sv, mg));
1260 call_method("CLEAR", G_SCALAR|G_DISCARD);
1267 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1270 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1274 PUSHSTACKi(PERLSI_MAGIC);
1277 PUSHs(SvTIED_obj(sv, mg));
1282 if (call_method(meth, G_SCALAR))
1283 sv_setsv(key, *PL_stack_sp--);
1292 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1294 return magic_methpack(sv,mg,"EXISTS");
1298 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1308 svp = av_fetch(GvAV(gv),
1309 atoi(MgPV(mg,n_a)), FALSE);
1310 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1316 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1318 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1323 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1325 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1330 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1332 SV* lsv = LvTARG(sv);
1334 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1335 mg = mg_find(lsv, 'g');
1336 if (mg && mg->mg_len >= 0) {
1339 sv_pos_b2u(lsv, &i);
1340 sv_setiv(sv, i + PL_curcop->cop_arybase);
1349 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1351 SV* lsv = LvTARG(sv);
1358 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1359 mg = mg_find(lsv, 'g');
1363 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1364 mg = mg_find(lsv, 'g');
1366 else if (!SvOK(sv)) {
1370 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1372 pos = SvIV(sv) - PL_curcop->cop_arybase;
1375 ulen = sv_len_utf8(lsv);
1390 sv_pos_u2b(lsv, &p, 0);
1395 mg->mg_flags &= ~MGf_MINMATCH;
1401 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1403 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1405 gv_efullname3(sv,((GV*)sv), "*");
1409 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1414 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1423 if (*s == '*' && s[1])
1425 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1430 GvGP(sv) = gp_ref(GvGP(gv));
1435 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1438 SV *lsv = LvTARG(sv);
1439 char *tmps = SvPV(lsv,len);
1440 I32 offs = LvTARGOFF(sv);
1441 I32 rem = LvTARGLEN(sv);
1444 sv_pos_u2b(lsv, &offs, &rem);
1447 if (rem + offs > len)
1449 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1456 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1459 char *tmps = SvPV(sv, len);
1460 SV *lsv = LvTARG(sv);
1461 I32 lvoff = LvTARGOFF(sv);
1462 I32 lvlen = LvTARGLEN(sv);
1465 sv_utf8_upgrade(lsv);
1466 sv_pos_u2b(lsv, &lvoff, &lvlen);
1467 sv_insert(lsv, lvoff, lvlen, tmps, len);
1470 else if (SvUTF8(lsv)) {
1471 sv_pos_u2b(lsv, &lvoff, &lvlen);
1472 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1473 sv_insert(lsv, lvoff, lvlen, tmps, len);
1477 sv_insert(lsv, lvoff, lvlen, tmps, len);
1483 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1485 TAINT_IF((mg->mg_len & 1) ||
1486 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1491 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1493 if (PL_localizing) {
1494 if (PL_localizing == 1)
1499 else if (PL_tainted)
1507 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1509 SV *lsv = LvTARG(sv);
1516 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1521 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1523 do_vecset(sv); /* XXX slurp this routine */
1528 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1531 if (LvTARGLEN(sv)) {
1533 SV *ahv = LvTARG(sv);
1534 if (SvTYPE(ahv) == SVt_PVHV) {
1535 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1540 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1546 AV* av = (AV*)LvTARG(sv);
1547 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1548 targ = AvARRAY(av)[LvTARGOFF(sv)];
1550 if (targ && targ != &PL_sv_undef) {
1551 /* somebody else defined it for us */
1552 SvREFCNT_dec(LvTARG(sv));
1553 LvTARG(sv) = SvREFCNT_inc(targ);
1555 SvREFCNT_dec(mg->mg_obj);
1556 mg->mg_obj = Nullsv;
1557 mg->mg_flags &= ~MGf_REFCOUNTED;
1562 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1567 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1572 sv_setsv(LvTARG(sv), sv);
1573 SvSETMAGIC(LvTARG(sv));
1579 Perl_vivify_defelem(pTHX_ SV *sv)
1584 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1587 SV *ahv = LvTARG(sv);
1589 if (SvTYPE(ahv) == SVt_PVHV) {
1590 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1595 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1599 if (!value || value == &PL_sv_undef)
1600 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1603 AV* av = (AV*)LvTARG(sv);
1604 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1605 LvTARG(sv) = Nullsv; /* array can't be extended */
1607 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1608 if (!svp || (value = *svp) == &PL_sv_undef)
1609 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1612 (void)SvREFCNT_inc(value);
1613 SvREFCNT_dec(LvTARG(sv));
1616 SvREFCNT_dec(mg->mg_obj);
1617 mg->mg_obj = Nullsv;
1618 mg->mg_flags &= ~MGf_REFCOUNTED;
1622 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1624 AV *av = (AV*)mg->mg_obj;
1625 SV **svp = AvARRAY(av);
1626 I32 i = AvFILLp(av);
1628 if (svp[i] && svp[i] != &PL_sv_undef) {
1629 if (!SvWEAKREF(svp[i]))
1630 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1631 /* XXX Should we check that it hasn't changed? */
1633 (void)SvOK_off(svp[i]);
1634 SvWEAKREF_off(svp[i]);
1635 svp[i] = &PL_sv_undef;
1643 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1651 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1653 sv_unmagic(sv, 'B');
1659 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1661 sv_unmagic(sv, 'f');
1667 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1669 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1671 if (uf && uf->uf_set)
1672 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1677 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1679 regexp *re = (regexp *)mg->mg_obj;
1684 #ifdef USE_LOCALE_COLLATE
1686 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1689 * RenE<eacute> Descartes said "I think not."
1690 * and vanished with a faint plop.
1693 Safefree(mg->mg_ptr);
1699 #endif /* USE_LOCALE_COLLATE */
1702 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1707 switch (*mg->mg_ptr) {
1708 case '\001': /* ^A */
1709 sv_setsv(PL_bodytarget, sv);
1711 case '\003': /* ^C */
1712 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1715 case '\004': /* ^D */
1716 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1717 DEBUG_x(dump_all());
1719 case '\005': /* ^E */
1720 #ifdef MACOS_TRADITIONAL
1721 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1724 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1727 SetLastError( SvIV(sv) );
1730 /* will anyone ever use this? */
1731 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1737 case '\006': /* ^F */
1738 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1740 case '\010': /* ^H */
1741 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1743 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1745 Safefree(PL_inplace);
1747 PL_inplace = savepv(SvPV(sv,len));
1749 PL_inplace = Nullch;
1751 case '\017': /* ^O */
1752 if (*(mg->mg_ptr+1) == '\0') {
1754 Safefree(PL_osname);
1756 PL_osname = savepv(SvPV(sv,len));
1760 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1761 if (!PL_compiling.cop_io)
1762 PL_compiling.cop_io = newSVsv(sv);
1764 sv_setsv(PL_compiling.cop_io,sv);
1767 case '\020': /* ^P */
1768 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1769 if (PL_perldb && !PL_DBsingle)
1772 case '\024': /* ^T */
1774 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1776 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1779 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1780 if (*(mg->mg_ptr+1) == '\0') {
1781 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1782 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1783 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1784 | (i ? G_WARN_ON : G_WARN_OFF) ;
1787 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1788 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1789 if (!SvPOK(sv) && PL_localizing) {
1790 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1791 PL_compiling.cop_warnings = pWARN_NONE;
1796 int accumulate = 0 ;
1797 int any_fatals = 0 ;
1798 char * ptr = (char*)SvPV(sv, len) ;
1799 for (i = 0 ; i < len ; ++i) {
1800 accumulate |= ptr[i] ;
1801 any_fatals |= (ptr[i] & 0xAA) ;
1804 PL_compiling.cop_warnings = pWARN_NONE;
1805 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1806 PL_compiling.cop_warnings = pWARN_ALL;
1807 PL_dowarn |= G_WARN_ONCE ;
1810 if (specialWARN(PL_compiling.cop_warnings))
1811 PL_compiling.cop_warnings = newSVsv(sv) ;
1813 sv_setsv(PL_compiling.cop_warnings, sv);
1814 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1815 PL_dowarn |= G_WARN_ONCE ;
1821 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1822 PL_widesyscalls = SvTRUE(sv);
1825 if (PL_localizing) {
1826 if (PL_localizing == 1)
1827 SAVESPTR(PL_last_in_gv);
1829 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1830 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1833 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1834 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1835 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1838 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1839 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1840 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1843 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1846 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1847 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1848 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1851 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1855 IO *io = GvIOp(PL_defoutgv);
1856 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1857 IoFLAGS(io) &= ~IOf_FLUSH;
1859 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1860 PerlIO *ofp = IoOFP(io);
1862 (void)PerlIO_flush(ofp);
1863 IoFLAGS(io) |= IOf_FLUSH;
1869 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1870 PL_multiline = (i != 0);
1873 SvREFCNT_dec(PL_nrs);
1874 PL_nrs = newSVsv(sv);
1875 SvREFCNT_dec(PL_rs);
1876 PL_rs = SvREFCNT_inc(PL_nrs);
1880 SvREFCNT_dec(PL_ors_sv);
1881 if (SvOK(sv) || SvGMAGICAL(sv)) {
1882 PL_ors_sv = newSVsv(sv);
1890 SvREFCNT_dec(PL_ofs_sv);
1891 if (SvOK(sv) || SvGMAGICAL(sv)) {
1892 PL_ofs_sv = newSVsv(sv);
1901 PL_ofmt = savepv(SvPV(sv,len));
1904 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1907 #ifdef COMPLEX_STATUS
1908 if (PL_localizing == 2) {
1909 PL_statusvalue = LvTARGOFF(sv);
1910 PL_statusvalue_vms = LvTARGLEN(sv);
1914 #ifdef VMSISH_STATUS
1916 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1919 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1922 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1923 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1926 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1927 if (PL_delaymagic) {
1928 PL_delaymagic |= DM_RUID;
1929 break; /* don't do magic till later */
1932 (void)setruid((Uid_t)PL_uid);
1935 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1937 #ifdef HAS_SETRESUID
1938 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1940 if (PL_uid == PL_euid) /* special case $< = $> */
1941 (void)PerlProc_setuid(PL_uid);
1943 PL_uid = PerlProc_getuid();
1944 Perl_croak(aTHX_ "setruid() not implemented");
1949 PL_uid = PerlProc_getuid();
1950 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1953 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1954 if (PL_delaymagic) {
1955 PL_delaymagic |= DM_EUID;
1956 break; /* don't do magic till later */
1959 (void)seteuid((Uid_t)PL_euid);
1962 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1964 #ifdef HAS_SETRESUID
1965 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1967 if (PL_euid == PL_uid) /* special case $> = $< */
1968 PerlProc_setuid(PL_euid);
1970 PL_euid = PerlProc_geteuid();
1971 Perl_croak(aTHX_ "seteuid() not implemented");
1976 PL_euid = PerlProc_geteuid();
1977 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1980 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1981 if (PL_delaymagic) {
1982 PL_delaymagic |= DM_RGID;
1983 break; /* don't do magic till later */
1986 (void)setrgid((Gid_t)PL_gid);
1989 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1991 #ifdef HAS_SETRESGID
1992 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1994 if (PL_gid == PL_egid) /* special case $( = $) */
1995 (void)PerlProc_setgid(PL_gid);
1997 PL_gid = PerlProc_getgid();
1998 Perl_croak(aTHX_ "setrgid() not implemented");
2003 PL_gid = PerlProc_getgid();
2004 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2007 #ifdef HAS_SETGROUPS
2009 char *p = SvPV(sv, len);
2010 Groups_t gary[NGROUPS];
2015 for (i = 0; i < NGROUPS; ++i) {
2016 while (*p && !isSPACE(*p))
2025 (void)setgroups(i, gary);
2027 #else /* HAS_SETGROUPS */
2028 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2029 #endif /* HAS_SETGROUPS */
2030 if (PL_delaymagic) {
2031 PL_delaymagic |= DM_EGID;
2032 break; /* don't do magic till later */
2035 (void)setegid((Gid_t)PL_egid);
2038 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2040 #ifdef HAS_SETRESGID
2041 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2043 if (PL_egid == PL_gid) /* special case $) = $( */
2044 (void)PerlProc_setgid(PL_egid);
2046 PL_egid = PerlProc_getegid();
2047 Perl_croak(aTHX_ "setegid() not implemented");
2052 PL_egid = PerlProc_getegid();
2053 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2056 PL_chopset = SvPV_force(sv,len);
2058 #ifndef MACOS_TRADITIONAL
2060 #ifdef HAS_SETPROCTITLE
2061 /* The BSDs don't show the argv[] in ps(1) output, they
2062 * show a string from the process struct and provide
2063 * the setproctitle() routine to manipulate that. */
2066 # if __FreeBSD_version >= 410001
2067 /* The leading "-" removes the "perl: " prefix,
2068 * but not the "(perl) suffix from the ps(1)
2069 * output, because that's what ps(1) shows if the
2070 * argv[] is modified. */
2071 setproctitle("-%s", s, len + 1);
2072 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2073 /* This doesn't really work if you assume that
2074 * $0 = 'foobar'; will wipe out 'perl' from the $0
2075 * because in ps(1) output the result will be like
2076 * sprintf("perl: %s (perl)", s)
2077 * I guess this is a security feature:
2078 * one (a user process) cannot get rid of the original name.
2080 setproctitle("%s", s);
2087 /* See if all the arguments are contiguous in memory */
2088 for (i = 1; i < PL_origargc; i++) {
2089 if (PL_origargv[i] == s + 1
2091 || PL_origargv[i] == s + 2
2096 s += strlen(s); /* this one is ok too */
2101 /* can grab env area too? */
2102 if (PL_origenviron && (PL_origenviron[0] == s + 1
2104 || (PL_origenviron[0] == s + 9 && (s += 8))
2107 my_setenv("NoNe SuCh", Nullch);
2108 /* force copy of environment */
2109 for (i = 0; PL_origenviron[i]; i++)
2110 if (PL_origenviron[i] == s + 1) {
2117 PL_origalen = s - PL_origargv[0];
2119 s = SvPV_force(sv,len);
2121 if (i >= PL_origalen) {
2123 /* don't allow system to limit $0 seen by script */
2124 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2125 Copy(s, PL_origargv[0], i, char);
2126 s = PL_origargv[0]+i;
2130 Copy(s, PL_origargv[0], i, char);
2131 s = PL_origargv[0]+i;
2133 while (++i < PL_origalen)
2135 s = PL_origargv[0]+i;
2136 for (i = 1; i < PL_origargc; i++)
2137 PL_origargv[i] = Nullch;
2143 sv_setsv(thr->errsv, sv);
2145 #endif /* USE_THREADS */
2152 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2154 DEBUG_S(PerlIO_printf(Perl_debug_log,
2155 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2156 PTR2UV(thr), PTR2UV(sv));)
2158 Perl_croak(aTHX_ "panic: magic_mutexfree");
2159 MUTEX_DESTROY(MgMUTEXP(mg));
2160 COND_DESTROY(MgCONDP(mg));
2163 #endif /* USE_THREADS */
2166 Perl_whichsig(pTHX_ char *sig)
2168 register char **sigv;
2170 for (sigv = PL_sig_name+1; *sigv; sigv++)
2171 if (strEQ(sig,*sigv))
2172 return PL_sig_num[sigv - PL_sig_name];
2174 if (strEQ(sig,"CHLD"))
2178 if (strEQ(sig,"CLD"))
2187 Perl_sighandler(int sig)
2189 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2190 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2197 SV *sv, *tSv = PL_Sv;
2201 I32 o_save_i = PL_savestack_ix;
2204 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2205 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2208 if (PL_savestack_ix + 15 <= PL_savestack_max)
2210 if (PL_markstack_ptr < PL_markstack_max - 2)
2212 if (PL_retstack_ix < PL_retstack_max - 2)
2214 if (PL_scopestack_ix < PL_scopestack_max - 3)
2217 if (!PL_psig_ptr[sig])
2218 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2221 /* Max number of items pushed there is 3*n or 4. We cannot fix
2222 infinity, so we fix 4 (in fact 5): */
2224 PL_savestack_ix += 5; /* Protect save in progress. */
2225 o_save_i = PL_savestack_ix;
2226 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2229 PL_markstack_ptr++; /* Protect mark. */
2232 PL_retstack[PL_retstack_ix] = NULL;
2235 PL_scopestack_ix += 1;
2236 /* sv_2cv is too complicated, try a simpler variant first: */
2237 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2238 || SvTYPE(cv) != SVt_PVCV)
2239 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2241 if (!cv || !CvROOT(cv)) {
2242 if (ckWARN(WARN_SIGNAL))
2243 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2244 PL_sig_name[sig], (gv ? GvENAME(gv)
2251 if(PL_psig_name[sig]) {
2252 sv = SvREFCNT_inc(PL_psig_name[sig]);
2256 sv = sv_newmortal();
2257 sv_setpv(sv,PL_sig_name[sig]);
2260 PUSHSTACKi(PERLSI_SIGNAL);
2265 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2268 if (SvTRUE(ERRSV)) {
2270 #ifdef HAS_SIGPROCMASK
2271 /* Handler "died", for example to get out of a restart-able read().
2272 * Before we re-do that on its behalf re-enable the signal which was
2273 * blocked by the system when we entered.
2277 sigaddset(&set,sig);
2278 sigprocmask(SIG_UNBLOCK, &set, NULL);
2280 /* Not clear if this will work */
2281 (void)rsignal(sig, SIG_IGN);
2282 (void)rsignal(sig, &Perl_csighandler);
2284 #endif /* !PERL_MICRO */
2285 Perl_die(aTHX_ Nullch);
2289 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2295 PL_scopestack_ix -= 1;
2298 PL_op = myop; /* Apparently not needed... */
2300 PL_Sv = tSv; /* Restore global temporaries. */
2311 restore_magic(pTHXo_ void *p)
2313 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2314 SV* sv = mgs->mgs_sv;
2319 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2322 SvFLAGS(sv) |= mgs->mgs_flags;
2326 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2329 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2331 /* If we're still on top of the stack, pop us off. (That condition
2332 * will be satisfied if restore_magic was called explicitly, but *not*
2333 * if it's being called via leave_scope.)
2334 * The reason for doing this is that otherwise, things like sv_2cv()
2335 * may leave alloc gunk on the savestack, and some code
2336 * (e.g. sighandler) doesn't expect that...
2338 if (PL_savestack_ix == mgs->mgs_ss_ix)
2340 I32 popval = SSPOPINT;
2341 assert(popval == SAVEt_DESTRUCTOR_X);
2342 PL_savestack_ix -= 2;
2344 assert(popval == SAVEt_ALLOC);
2346 PL_savestack_ix -= popval;
2352 unwind_handler_stack(pTHXo_ void *p)
2354 U32 flags = *(U32*)p;
2357 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2358 /* cxstack_ix-- Not needed, die already unwound it. */
2360 SvREFCNT_dec(sig_sv);