/* mg.c * * Copyright (c) 1991-1997, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "Sam sat on the ground and put his head in his hands. 'I wish I had never * come here, and I don't want to see no more magic,' he said, and fell silent." */ #include "EXTERN.h" #include "perl.h" /* XXX If this causes problems, set i_unistd=undef in the hint file. */ #ifdef I_UNISTD # include #endif #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS) # ifndef NGROUPS # define NGROUPS 32 # endif #endif #ifdef PERL_OBJECT # define VTBL this->*vtbl #else # define VTBL *vtbl static void restore_magic _((void *p)); static int magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 f, int n, SV *val); #endif /* * Use the "DESTRUCTOR" scope cleanup to reinstate magic. */ struct magic_state { SV* mgs_sv; U32 mgs_flags; I32 mgs_ss_ix; }; /* MGS is typedef'ed to struct magic_state in perl.h */ STATIC void save_magic(I32 mgs_ix, SV *sv) { dTHR; MGS* mgs; assert(SvMAGICAL(sv)); SAVEDESTRUCTOR(restore_magic, (void*)mgs_ix); mgs = SSPTR(mgs_ix, MGS*); mgs->mgs_sv = sv; mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv); mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */ SvMAGICAL_off(sv); SvREADONLY_off(sv); SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT; } STATIC void restore_magic(void *p) { dTHR; MGS* mgs = SSPTR((I32)p, MGS*); SV* sv = mgs->mgs_sv; if (!sv) return; if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { if (mgs->mgs_flags) SvFLAGS(sv) |= mgs->mgs_flags; else mg_magical(sv); if (SvGMAGICAL(sv)) SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK); } mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ /* If we're still on top of the stack, pop us off. (That condition * will be satisfied if restore_magic was called explicitly, but *not* * if it's being called via leave_scope.) * The reason for doing this is that otherwise, things like sv_2cv() * may leave alloc gunk on the savestack, and some code * (e.g. sighandler) doesn't expect that... */ if (PL_savestack_ix == mgs->mgs_ss_ix) { I32 popval = SSPOPINT; assert(popval == SAVEt_DESTRUCTOR); PL_savestack_ix -= 2; popval = SSPOPINT; assert(popval == SAVEt_ALLOC); popval = SSPOPINT; PL_savestack_ix -= popval; } } void mg_magical(SV *sv) { MAGIC* mg; for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { MGVTBL* vtbl = mg->mg_virtual; if (vtbl) { if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP)) SvGMAGICAL_on(sv); if (vtbl->svt_set) SvSMAGICAL_on(sv); if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL)) SvRMAGICAL_on(sv); } } } int mg_get(SV *sv) { dTHR; I32 mgs_ix; MAGIC* mg; MAGIC** mgp; int mgp_valid = 0; mgs_ix = SSNEW(sizeof(MGS)); save_magic(mgs_ix, sv); mgp = &SvMAGIC(sv); while ((mg = *mgp) != 0) { MGVTBL* vtbl = mg->mg_virtual; if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) { (VTBL->svt_get)(sv, mg); /* Ignore this magic if it's been deleted */ if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) && (mg->mg_flags & MGf_GSKIP)) (SSPTR(mgs_ix, MGS*))->mgs_flags = 0; } /* Advance to next magic (complicated by possible deletion) */ if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) { mgp = &mg->mg_moremagic; mgp_valid = 1; } else mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */ } restore_magic((void*)mgs_ix); return 0; } int mg_set(SV *sv) { dTHR; I32 mgs_ix; MAGIC* mg; MAGIC* nextmg; mgs_ix = SSNEW(sizeof(MGS)); save_magic(mgs_ix, sv); for (mg = SvMAGIC(sv); mg; mg = nextmg) { MGVTBL* vtbl = mg->mg_virtual; nextmg = mg->mg_moremagic; /* it may delete itself */ if (mg->mg_flags & MGf_GSKIP) { mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */ (SSPTR(mgs_ix, MGS*))->mgs_flags = 0; } if (vtbl && (vtbl->svt_set != NULL)) (VTBL->svt_set)(sv, mg); } restore_magic((void*)mgs_ix); return 0; } U32 mg_length(SV *sv) { MAGIC* mg; char *junk; STRLEN len; for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { MGVTBL* vtbl = mg->mg_virtual; if (vtbl && (vtbl->svt_len != NULL)) { I32 mgs_ix; mgs_ix = SSNEW(sizeof(MGS)); save_magic(mgs_ix, sv); /* omit MGf_GSKIP -- not changed here */ len = (VTBL->svt_len)(sv, mg); restore_magic((void*)mgs_ix); return len; } } junk = SvPV(sv, len); return len; } I32 mg_size(SV *sv) { MAGIC* mg; I32 len; for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { MGVTBL* vtbl = mg->mg_virtual; if (vtbl && (vtbl->svt_len != NULL)) { I32 mgs_ix; mgs_ix = SSNEW(sizeof(MGS)); save_magic(mgs_ix, sv); /* omit MGf_GSKIP -- not changed here */ len = (VTBL->svt_len)(sv, mg); restore_magic((void*)mgs_ix); return len; } } switch(SvTYPE(sv)) { case SVt_PVAV: len = AvFILLp((AV *) sv); /* Fallback to non-tied array */ return len; case SVt_PVHV: /* FIXME */ default: croak("Size magic not implemented"); break; } return 0; } int mg_clear(SV *sv) { I32 mgs_ix; MAGIC* mg; mgs_ix = SSNEW(sizeof(MGS)); save_magic(mgs_ix, sv); for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { MGVTBL* vtbl = mg->mg_virtual; /* omit GSKIP -- never set here */ if (vtbl && (vtbl->svt_clear != NULL)) (VTBL->svt_clear)(sv, mg); } restore_magic((void*)mgs_ix); return 0; } MAGIC* mg_find(SV *sv, int type) { MAGIC* mg; for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { if (mg->mg_type == type) return mg; } return 0; } int mg_copy(SV *sv, SV *nsv, char *key, I32 klen) { int count = 0; MAGIC* mg; for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { if (isUPPER(mg->mg_type)) { sv_magic(nsv, mg->mg_type == 'P' ? SvTIED_obj(sv, mg) : mg->mg_obj, toLOWER(mg->mg_type), key, klen); count++; } } return count; } int mg_free(SV *sv) { MAGIC* mg; MAGIC* moremagic; for (mg = SvMAGIC(sv); mg; mg = moremagic) { MGVTBL* vtbl = mg->mg_virtual; moremagic = mg->mg_moremagic; if (vtbl && (vtbl->svt_free != NULL)) (VTBL->svt_free)(sv, mg); if (mg->mg_ptr && mg->mg_type != 'g') if (mg->mg_len >= 0) Safefree(mg->mg_ptr); else if (mg->mg_len == HEf_SVKEY) SvREFCNT_dec((SV*)mg->mg_ptr); if (mg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(mg->mg_obj); Safefree(mg); } SvMAGIC(sv) = 0; return 0; } #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) #include #endif U32 magic_regdata_cnt(SV *sv, MAGIC *mg) { dTHR; register char *s; register I32 i; register REGEXP *rx; char *t; if (PL_curpm && (rx = PL_curpm->op_pmregexp)) return rx->lastparen; return (U32)-1; } int magic_regdatum_get(SV *sv, MAGIC *mg) { dTHR; register I32 paren; register char *s; register I32 i; register REGEXP *rx; char *t; if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { paren = mg->mg_len; if (paren < 0) return 0; if (paren <= rx->nparens && (s = rx->startp[paren]) && (t = rx->endp[paren])) { if (mg->mg_obj) /* @+ */ i = t - rx->subbase; else /* @- */ i = s - rx->subbase; sv_setiv(sv,i); } } return 0; } U32 magic_len(SV *sv, MAGIC *mg) { dTHR; register I32 paren; register char *s; register I32 i; register REGEXP *rx; char *t; switch (*mg->mg_ptr) { case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '&': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { paren = atoi(mg->mg_ptr); getparen: if (paren <= rx->nparens && (s = rx->startp[paren]) && (t = rx->endp[paren])) { i = t - s; if (i >= 0) return i; } } return 0; case '+': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { paren = rx->lastparen; if (paren) goto getparen; } return 0; case '`': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { if ((s = rx->subbeg) && rx->startp[0]) { i = rx->startp[0] - s; if (i >= 0) return i; } } return 0; case '\'': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { if (rx->subend && (s = rx->endp[0])) { i = rx->subend - s; if (i >= 0) return i; } } return 0; case ',': return (STRLEN)PL_ofslen; case '\\': return (STRLEN)PL_orslen; } magic_get(sv,mg); if (!SvPOK(sv) && SvNIOK(sv)) sv_2pv(sv, &PL_na); if (SvPOK(sv)) return SvCUR(sv); return 0; } #if 0 static char * printW(sv) SV * sv ; { #if 1 return "" ; #else int i ; static char buffer[50] ; char buf1[20] ; char * p ; sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ; p = SvPVX(sv) ; for (i = 0; i < SvCUR(sv) ; ++ i) { sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ; strcat(buffer, buf1) ; } return buffer ; #endif } #endif int magic_get(SV *sv, MAGIC *mg) { dTHR; register I32 paren; register char *s; register I32 i; register REGEXP *rx; char *t; switch (*mg->mg_ptr) { case '\001': /* ^A */ sv_setsv(sv, PL_bodytarget); break; case '\002': /* ^B */ /* printf("magic_get $^B: ") ; */ if (PL_curcop->cop_warnings == WARN_NONE) /* printf("WARN_NONE\n"), */ sv_setpvn(sv, WARN_NONEstring, WARNsize) ; else if (PL_curcop->cop_warnings == WARN_ALL) /* printf("WARN_ALL\n"), */ sv_setpvn(sv, WARN_ALLstring, WARNsize) ; else /* printf("some %s\n", printW(PL_curcop->cop_warnings)), */ sv_setsv(sv, PL_curcop->cop_warnings); break; case '\004': /* ^D */ sv_setiv(sv, (IV)(PL_debug & 32767)); break; case '\005': /* ^E */ #ifdef VMS { # include # include char msg[255]; $DESCRIPTOR(msgdsc,msg); sv_setnv(sv,(double) vaxc$errno); if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); else sv_setpv(sv,""); } #else #ifdef OS2 if (!(_emx_env & 0x200)) { /* Under DOS */ sv_setnv(sv, (double)errno); sv_setpv(sv, errno ? Strerror(errno) : ""); } else { if (errno != errno_isOS2) { int tmp = _syserrno(); if (tmp) /* 2nd call to _syserrno() makes it 0 */ Perl_rc = tmp; } sv_setnv(sv, (double)Perl_rc); sv_setpv(sv, os2error(Perl_rc)); } #else #ifdef WIN32 { DWORD dwErr = GetLastError(); sv_setnv(sv, (double)dwErr); if (dwErr) { #ifdef PERL_OBJECT char *sMsg; DWORD dwLen; PerlProc_GetSysMsg(sMsg, dwLen, dwErr); sv_setpvn(sv, sMsg, dwLen); PerlProc_FreeBuf(sMsg); #else win32_str_os_error(sv, dwErr); #endif } else sv_setpv(sv, ""); SetLastError(dwErr); } #else sv_setnv(sv, (double)errno); sv_setpv(sv, errno ? Strerror(errno) : ""); #endif #endif #endif SvNOK_on(sv); /* what a wonderful hack! */ break; case '\006': /* ^F */ sv_setiv(sv, (IV)PL_maxsysfd); break; case '\010': /* ^H */ sv_setiv(sv, (IV)PL_hints); break; case '\011': /* ^I */ /* NOT \t in EBCDIC */ if (PL_inplace) sv_setpv(sv, PL_inplace); else sv_setsv(sv, &PL_sv_undef); break; case '\017': /* ^O */ sv_setpv(sv, PL_osname); break; case '\020': /* ^P */ sv_setiv(sv, (IV)PL_perldb); break; case '\023': /* ^S */ { dTHR; if (PL_lex_state != LEX_NOTPARSING) SvOK_off(sv); else if (PL_in_eval) sv_setiv(sv, 1); else sv_setiv(sv, 0); } break; case '\024': /* ^T */ #ifdef BIG_TIME sv_setnv(sv, PL_basetime); #else sv_setiv(sv, (IV)PL_basetime); #endif break; case '\027': /* ^W */ sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON)); break; case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '&': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { /* * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj)); * XXX Does the new way break anything? */ paren = atoi(mg->mg_ptr); getparen: if (paren <= rx->nparens && (s = rx->startp[paren]) && (t = rx->endp[paren])) { i = t - s; getrx: if (i >= 0) { bool was_tainted; if (PL_tainting) { was_tainted = PL_tainted; PL_tainted = FALSE; } sv_setpvn(sv,s,i); if (PL_tainting) PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx)); break; } } } sv_setsv(sv,&PL_sv_undef); break; case '+': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { paren = rx->lastparen; if (paren) goto getparen; } sv_setsv(sv,&PL_sv_undef); break; case '`': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { if ((s = rx->subbeg) && rx->startp[0]) { i = rx->startp[0] - s; goto getrx; } } sv_setsv(sv,&PL_sv_undef); break; case '\'': if (PL_curpm && (rx = PL_curpm->op_pmregexp)) { if (rx->subend && (s = rx->endp[0])) { i = rx->subend - s; goto getrx; } } sv_setsv(sv,&PL_sv_undef); break; case '.': #ifndef lint if (GvIO(PL_last_in_gv)) { sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv))); } #endif break; case '?': { sv_setiv(sv, (IV)STATUS_CURRENT); #ifdef COMPLEX_STATUS LvTARGOFF(sv) = PL_statusvalue; LvTARGLEN(sv) = PL_statusvalue_vms; #endif } break; case '^': s = IoTOP_NAME(GvIOp(PL_defoutgv)); if (s) sv_setpv(sv,s); else { sv_setpv(sv,GvENAME(PL_defoutgv)); sv_catpv(sv,"_TOP"); } break; case '~': s = IoFMT_NAME(GvIOp(PL_defoutgv)); if (!s) s = GvENAME(PL_defoutgv); sv_setpv(sv,s); break; #ifndef lint case '=': sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); break; case '-': sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); break; case '%': sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); break; #endif case ':': break; case '/': break; case '[': WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase)); break; case '|': sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); break; case ',': sv_setpvn(sv,PL_ofs,PL_ofslen); break; case '\\': sv_setpvn(sv,PL_ors,PL_orslen); break; case '#': sv_setpv(sv,PL_ofmt); break; case '!': #ifdef VMS sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno)); sv_setpv(sv, errno ? Strerror(errno) : ""); #else { int saveerrno = errno; sv_setnv(sv, (double)errno); #ifdef OS2 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc)); else #endif sv_setpv(sv, errno ? Strerror(errno) : ""); errno = saveerrno; } #endif SvNOK_on(sv); /* what a wonderful hack! */ break; case '<': sv_setiv(sv, (IV)PL_uid); break; case '>': sv_setiv(sv, (IV)PL_euid); break; case '(': sv_setiv(sv, (IV)PL_gid); sv_setpvf(sv, "%Vd", (IV)PL_gid); goto add_groups; case ')': sv_setiv(sv, (IV)PL_egid); sv_setpvf(sv, "%Vd", (IV)PL_egid); add_groups: #ifdef HAS_GETGROUPS { Groups_t gary[NGROUPS]; i = getgroups(NGROUPS,gary); while (--i >= 0) sv_catpvf(sv, " %Vd", (IV)gary[i]); } #endif SvIOK_on(sv); /* what a wonderful hack! */ break; case '*': break; case '0': break; #ifdef USE_THREADS case '@': sv_setsv(sv, thr->errsv); break; #endif /* USE_THREADS */ } return 0; } int magic_getuvar(SV *sv, MAGIC *mg) { struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr; if (uf && uf->uf_val) (*uf->uf_val)(uf->uf_index, sv); return 0; } int magic_setenv(SV *sv, MAGIC *mg) { register char *s; char *ptr; STRLEN len, klen; I32 i; s = SvPV(sv,len); ptr = MgPV(mg,klen); my_setenv(ptr, s); #ifdef DYNAMIC_ENV_FETCH /* We just undefd an environment var. Is a replacement */ /* waiting in the wings? */ if (!len) { SV **valp; if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE))) s = SvPV(*valp, len); } #endif #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS) /* And you'll never guess what the dog had */ /* in its mouth... */ if (PL_tainting) { MgTAINTEDDIR_off(mg); #ifdef VMS if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) { char pathbuf[256], eltbuf[256], *cp, *elt = s; struct stat sbuf; int i = 0, j = 0; do { /* DCL$PATH may be a search list */ while (1) { /* as may dev portion of any element */ if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { if ( *(cp+1) == '.' || *(cp+1) == '-' || cando_by_name(S_IWUSR,0,elt) ) { MgTAINTEDDIR_on(mg); return 0; } } if ((cp = strchr(elt, ':')) != Nullch) *cp = '\0'; if (my_trnlnm(elt, eltbuf, j++)) elt = eltbuf; else break; } j = 0; } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); } #endif /* VMS */ if (s && klen == 4 && strEQ(ptr,"PATH")) { char *strend = s + len; while (s < strend) { char tmpbuf[256]; struct stat st; s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, strend, ':', &i); s++; if (i >= sizeof tmpbuf /* too long -- assume the worst */ || *tmpbuf != '/' || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { MgTAINTEDDIR_on(mg); return 0; } } } } #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */ return 0; } int magic_clearenv(SV *sv, MAGIC *mg) { my_setenv(MgPV(mg,PL_na),Nullch); return 0; } int magic_set_all_env(SV *sv, MAGIC *mg) { #if defined(VMS) die("Can't make list assignment to %%ENV on this system"); #else dTHR; if (PL_localizing) { HE* entry; magic_clear_all_env(sv,mg); hv_iterinit((HV*)sv); while (entry = hv_iternext((HV*)sv)) { I32 keylen; my_setenv(hv_iterkey(entry, &keylen), SvPV(hv_iterval((HV*)sv, entry), PL_na)); } } #endif return 0; } int magic_clear_all_env(SV *sv, MAGIC *mg) { #if defined(VMS) die("Can't make list assignment to %%ENV on this system"); #else #ifdef WIN32 char *envv = GetEnvironmentStrings(); char *cur = envv; STRLEN len; while (*cur) { char *end = strchr(cur,'='); if (end && end != cur) { *end = '\0'; my_setenv(cur,Nullch); *end = '='; cur += strlen(end+1)+1; } else if ((len = strlen(cur))) cur += len+1; } FreeEnvironmentStrings(envv); #else I32 i; if (environ == PL_origenviron) New(901, environ, 1, char*); else for (i = 0; environ[i]; i++) Safefree(environ[i]); environ[0] = Nullch; #endif #endif return 0; } int magic_getsig(SV *sv, MAGIC *mg) { I32 i; /* Are we fetching a signal entry? */ i = whichsig(MgPV(mg,PL_na)); if (i) { if(PL_psig_ptr[i]) sv_setsv(sv,PL_psig_ptr[i]); else { Sighandler_t sigstate = rsignal_state(i); /* cache state so we don't fetch it again */ if(sigstate == SIG_IGN) sv_setpv(sv,"IGNORE"); else sv_setsv(sv,&PL_sv_undef); PL_psig_ptr[i] = SvREFCNT_inc(sv); SvTEMP_off(sv); } } return 0; } int magic_clearsig(SV *sv, MAGIC *mg) { I32 i; /* Are we clearing a signal entry? */ i = whichsig(MgPV(mg,PL_na)); if (i) { if(PL_psig_ptr[i]) { SvREFCNT_dec(PL_psig_ptr[i]); PL_psig_ptr[i]=0; } if(PL_psig_name[i]) { SvREFCNT_dec(PL_psig_name[i]); PL_psig_name[i]=0; } } return 0; } int magic_setsig(SV *sv, MAGIC *mg) { dTHR; register char *s; I32 i; SV** svp; s = MgPV(mg,PL_na); if (*s == '_') { if (strEQ(s,"__DIE__")) svp = &PL_diehook; else if (strEQ(s,"__WARN__")) svp = &PL_warnhook; else if (strEQ(s,"__PARSE__")) svp = &PL_parsehook; else croak("No such hook: %s", s); i = 0; if (*svp) { SvREFCNT_dec(*svp); *svp = 0; } } else { i = whichsig(s); /* ...no, a brick */ if (!i) { if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM")) warner(WARN_SIGNAL, "No such signal: SIG%s", s); return 0; } SvREFCNT_dec(PL_psig_name[i]); SvREFCNT_dec(PL_psig_ptr[i]); PL_psig_ptr[i] = SvREFCNT_inc(sv); SvTEMP_off(sv); /* Make sure it doesn't go away on us */ PL_psig_name[i] = newSVpv(s, strlen(s)); SvREADONLY_on(PL_psig_name[i]); } if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) { if (i) (void)rsignal(i, PL_sighandlerp); else *svp = SvREFCNT_inc(sv); return 0; } s = SvPV_force(sv,PL_na); if (strEQ(s,"IGNORE")) { if (i) (void)rsignal(i, SIG_IGN); else *svp = 0; } else if (strEQ(s,"DEFAULT") || !*s) { if (i) (void)rsignal(i, SIG_DFL); else *svp = 0; } else { /* * We should warn if HINT_STRICT_REFS, but without * access to a known hint bit in a known OP, we can't * tell whether HINT_STRICT_REFS is in force or not. */ if (!strchr(s,':') && !strchr(s,'\'')) sv_setpv(sv, form("main::%s", s)); if (i) (void)rsignal(i, PL_sighandlerp); else *svp = SvREFCNT_inc(sv); } return 0; } int magic_setisa(SV *sv, MAGIC *mg) { PL_sub_generation++; return 0; } #ifdef OVERLOAD int magic_setamagic(SV *sv, MAGIC *mg) { /* HV_badAMAGIC_on(Sv_STASH(sv)); */ PL_amagic_generation++; return 0; } #endif /* OVERLOAD */ int magic_getnkeys(SV *sv, MAGIC *mg) { HV *hv = (HV*)LvTARG(sv); HE *entry; I32 i = 0; if (hv) { (void) hv_iterinit(hv); if (! SvTIED_mg((SV*)hv, 'P')) i = HvKEYS(hv); else { /*SUPPRESS 560*/ while (entry = hv_iternext(hv)) { i++; } } } sv_setiv(sv, (IV)i); return 0; } int magic_setnkeys(SV *sv, MAGIC *mg) { if (LvTARG(sv)) { hv_ksplit((HV*)LvTARG(sv), SvIV(sv)); } return 0; } /* caller is responsible for stack switching/cleanup */ STATIC int magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val) { dSP; PUSHMARK(SP); EXTEND(SP, n); PUSHs(SvTIED_obj(sv, mg)); if (n > 1) { if (mg->mg_ptr) { if (mg->mg_len >= 0) PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len))); else if (mg->mg_len == HEf_SVKEY) PUSHs((SV*)mg->mg_ptr); } else if (mg->mg_type == 'p') { PUSHs(sv_2mortal(newSViv(mg->mg_len))); } } if (n > 2) { PUSHs(val); } PUTBACK; return perl_call_method(meth, flags); } STATIC int magic_methpack(SV *sv, MAGIC *mg, char *meth) { dSP; ENTER; SAVETMPS; PUSHSTACKi(PERLSI_MAGIC); if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) { sv_setsv(sv, *PL_stack_sp--); } POPSTACK; FREETMPS; LEAVE; return 0; } int magic_getpack(SV *sv, MAGIC *mg) { magic_methpack(sv,mg,"FETCH"); if (mg->mg_ptr) mg->mg_flags |= MGf_GSKIP; return 0; } int magic_setpack(SV *sv, MAGIC *mg) { dSP; ENTER; PUSHSTACKi(PERLSI_MAGIC); magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv); POPSTACK; LEAVE; return 0; } int magic_clearpack(SV *sv, MAGIC *mg) { return magic_methpack(sv,mg,"DELETE"); } U32 magic_sizepack(SV *sv, MAGIC *mg) { dSP; U32 retval = 0; ENTER; SAVETMPS; PUSHSTACKi(PERLSI_MAGIC); if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) { sv = *PL_stack_sp--; retval = (U32) SvIV(sv)-1; } POPSTACK; FREETMPS; LEAVE; return retval; } int magic_wipepack(SV *sv, MAGIC *mg) { dSP; ENTER; PUSHSTACKi(PERLSI_MAGIC); PUSHMARK(SP); XPUSHs(SvTIED_obj(sv, mg)); PUTBACK; perl_call_method("CLEAR", G_SCALAR|G_DISCARD); POPSTACK; LEAVE; return 0; } int magic_nextpack(SV *sv, MAGIC *mg, SV *key) { dSP; char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY"; ENTER; SAVETMPS; PUSHSTACKi(PERLSI_MAGIC); PUSHMARK(SP); EXTEND(SP, 2); PUSHs(SvTIED_obj(sv, mg)); if (SvOK(key)) PUSHs(key); PUTBACK; if (perl_call_method(meth, G_SCALAR)) sv_setsv(key, *PL_stack_sp--); POPSTACK; FREETMPS; LEAVE; return 0; } int magic_existspack(SV *sv, MAGIC *mg) { return magic_methpack(sv,mg,"EXISTS"); } int magic_setdbline(SV *sv, MAGIC *mg) { dTHR; OP *o; I32 i; GV* gv; SV** svp; gv = PL_DBline; i = SvTRUE(sv); svp = av_fetch(GvAV(gv), atoi(MgPV(mg,PL_na)), FALSE); if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp))) o->op_private = i; else warn("Can't break at that line\n"); return 0; } int magic_getarylen(SV *sv, MAGIC *mg) { dTHR; sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase); return 0; } int magic_setarylen(SV *sv, MAGIC *mg) { dTHR; av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase); return 0; } int magic_getpos(SV *sv, MAGIC *mg) { SV* lsv = LvTARG(sv); if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) { mg = mg_find(lsv, 'g'); if (mg && mg->mg_len >= 0) { dTHR; I32 i = mg->mg_len; if (IN_UTF8) sv_pos_b2u(lsv, &i); sv_setiv(sv, i + PL_curcop->cop_arybase); return 0; } } (void)SvOK_off(sv); return 0; } int magic_setpos(SV *sv, MAGIC *mg) { SV* lsv = LvTARG(sv); SSize_t pos; STRLEN len; STRLEN ulen; dTHR; mg = 0; if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) mg = mg_find(lsv, 'g'); if (!mg) { if (!SvOK(sv)) return 0; sv_magic(lsv, (SV*)0, 'g', Nullch, 0); mg = mg_find(lsv, 'g'); } else if (!SvOK(sv)) { mg->mg_len = -1; return 0; } len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv); pos = SvIV(sv) - PL_curcop->cop_arybase; if (IN_UTF8) { ulen = sv_len_utf8(lsv); if (ulen) len = ulen; else ulen = 0; } if (pos < 0) { pos += len; if (pos < 0) pos = 0; } else if (pos > len) pos = len; if (ulen) { I32 p = pos; sv_pos_u2b(lsv, &p, 0); pos = p; } mg->mg_len = pos; mg->mg_flags &= ~MGf_MINMATCH; return 0; } int magic_getglob(SV *sv, MAGIC *mg) { if (SvFAKE(sv)) { /* FAKE globs can get coerced */ SvFAKE_off(sv); gv_efullname3(sv,((GV*)sv), "*"); SvFAKE_on(sv); } else gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */ return 0; } int magic_setglob(SV *sv, MAGIC *mg) { register char *s; GV* gv; if (!SvOK(sv)) return 0; s = SvPV(sv, PL_na); if (*s == '*' && s[1]) s++; gv = gv_fetchpv(s,TRUE, SVt_PVGV); if (sv == (SV*)gv) return 0; if (GvGP(sv)) gp_free((GV*)sv); GvGP(sv) = gp_ref(GvGP(gv)); return 0; } int magic_getsubstr(SV *sv, MAGIC *mg) { STRLEN len; SV *lsv = LvTARG(sv); char *tmps = SvPV(lsv,len); I32 offs = LvTARGOFF(sv); I32 rem = LvTARGLEN(sv); if (offs > len) offs = len; if (rem + offs > len) rem = len - offs; sv_setpvn(sv, tmps + offs, (STRLEN)rem); return 0; } int magic_setsubstr(SV *sv, MAGIC *mg) { STRLEN len; char *tmps = SvPV(sv,len); sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len); return 0; } int magic_gettaint(SV *sv, MAGIC *mg) { dTHR; TAINT_IF((mg->mg_len & 1) || (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */ return 0; } int magic_settaint(SV *sv, MAGIC *mg) { dTHR; if (PL_localizing) { if (PL_localizing == 1) mg->mg_len <<= 1; else mg->mg_len >>= 1; } else if (PL_tainted) mg->mg_len |= 1; else mg->mg_len &= ~1; return 0; } int magic_getvec(SV *sv, MAGIC *mg) { SV *lsv = LvTARG(sv); unsigned char *s; unsigned long retnum; STRLEN lsvlen; I32 len; I32 offset; I32 size; if (!lsv) { SvOK_off(sv); return 0; } s = (unsigned char *) SvPV(lsv, lsvlen); offset = LvTARGOFF(sv); size = LvTARGLEN(sv); len = (offset + size + 7) / 8; /* Copied from pp_vec() */ if (len > lsvlen) { if (size <= 8) retnum = 0; else { offset >>= 3; if (size == 16) { if (offset >= lsvlen) retnum = 0; else retnum = (unsigned long) s[offset] << 8; } else if (size == 32) { if (offset >= lsvlen) retnum = 0; else if (offset + 1 >= lsvlen) retnum = (unsigned long) s[offset] << 24; else if (offset + 2 >= lsvlen) retnum = ((unsigned long) s[offset] << 24) + ((unsigned long) s[offset + 1] << 16); else retnum = ((unsigned long) s[offset] << 24) + ((unsigned long) s[offset + 1] << 16) + (s[offset + 2] << 8); } } } else if (size < 8) retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1); else { offset >>= 3; if (size == 8) retnum = s[offset]; else if (size == 16) retnum = ((unsigned long) s[offset] << 8) + s[offset+1]; else if (size == 32) retnum = ((unsigned long) s[offset] << 24) + ((unsigned long) s[offset + 1] << 16) + (s[offset + 2] << 8) + s[offset+3]; } sv_setuv(sv, (UV)retnum); return 0; } int magic_setvec(SV *sv, MAGIC *mg) { do_vecset(sv); /* XXX slurp this routine */ return 0; } int magic_getdefelem(SV *sv, MAGIC *mg) { SV *targ = Nullsv; if (LvTARGLEN(sv)) { if (mg->mg_obj) { SV *ahv = LvTARG(sv); if (SvTYPE(ahv) == SVt_PVHV) { HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0); if (he) targ = HeVAL(he); } else { SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0); if (svp) targ = *svp; } } else { AV* av = (AV*)LvTARG(sv); if ((I32)LvTARGOFF(sv) <= AvFILL(av)) targ = AvARRAY(av)[LvTARGOFF(sv)]; } if (targ && targ != &PL_sv_undef) { dTHR; /* just for SvREFCNT_dec */ /* somebody else defined it for us */ SvREFCNT_dec(LvTARG(sv)); LvTARG(sv) = SvREFCNT_inc(targ); LvTARGLEN(sv) = 0; SvREFCNT_dec(mg->mg_obj); mg->mg_obj = Nullsv; mg->mg_flags &= ~MGf_REFCOUNTED; } } else targ = LvTARG(sv); sv_setsv(sv, targ ? targ : &PL_sv_undef); return 0; } int magic_setdefelem(SV *sv, MAGIC *mg) { if (LvTARGLEN(sv)) vivify_defelem(sv); if (LvTARG(sv)) { sv_setsv(LvTARG(sv), sv); SvSETMAGIC(LvTARG(sv)); } return 0; } void vivify_defelem(SV *sv) { dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/ MAGIC *mg; SV *value = Nullsv; if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y'))) return; if (mg->mg_obj) { SV *ahv = LvTARG(sv); if (SvTYPE(ahv) == SVt_PVHV) { HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0); if (he) value = HeVAL(he); } else { SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0); if (svp) value = *svp; } if (!value || value == &PL_sv_undef) croak(PL_no_helem, SvPV(mg->mg_obj, PL_na)); } else { AV* av = (AV*)LvTARG(sv); if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av)) LvTARG(sv) = Nullsv; /* array can't be extended */ else { SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE); if (!svp || (value = *svp) == &PL_sv_undef) croak(PL_no_aelem, (I32)LvTARGOFF(sv)); } } (void)SvREFCNT_inc(value); SvREFCNT_dec(LvTARG(sv)); LvTARG(sv) = value; LvTARGLEN(sv) = 0; SvREFCNT_dec(mg->mg_obj); mg->mg_obj = Nullsv; mg->mg_flags &= ~MGf_REFCOUNTED; } int magic_setmglob(SV *sv, MAGIC *mg) { mg->mg_len = -1; SvSCREAM_off(sv); return 0; } int magic_setbm(SV *sv, MAGIC *mg) { sv_unmagic(sv, 'B'); SvVALID_off(sv); return 0; } int magic_setfm(SV *sv, MAGIC *mg) { sv_unmagic(sv, 'f'); SvCOMPILED_off(sv); return 0; } int magic_setuvar(SV *sv, MAGIC *mg) { struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr; if (uf && uf->uf_set) (*uf->uf_set)(uf->uf_index, sv); return 0; } int magic_freeregexp(SV *sv, MAGIC *mg) { regexp *re = (regexp *)mg->mg_obj; ReREFCNT_dec(re); return 0; } #ifdef USE_LOCALE_COLLATE int magic_setcollxfrm(SV *sv, MAGIC *mg) { /* * RenE Descartes said "I think not." * and vanished with a faint plop. */ if (mg->mg_ptr) { Safefree(mg->mg_ptr); mg->mg_ptr = NULL; mg->mg_len = -1; } return 0; } #endif /* USE_LOCALE_COLLATE */ int magic_set(SV *sv, MAGIC *mg) { dTHR; register char *s; I32 i; STRLEN len; switch (*mg->mg_ptr) { case '\001': /* ^A */ sv_setsv(PL_bodytarget, sv); break; case '\002': /* ^B */ if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize)) PL_compiling.cop_warnings = WARN_ALL; else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize)) PL_compiling.cop_warnings = WARN_NONE; else { if (PL_compiling.cop_warnings != WARN_NONE && PL_compiling.cop_warnings != WARN_ALL) sv_setsv(PL_compiling.cop_warnings, sv); else PL_compiling.cop_warnings = newSVsv(sv) ; } } break; case '\004': /* ^D */ PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000; DEBUG_x(dump_all()); break; case '\005': /* ^E */ #ifdef VMS set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)); #else #ifdef WIN32 SetLastError( SvIV(sv) ); #else /* will anyone ever use this? */ SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4); #endif #endif break; case '\006': /* ^F */ PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); break; case '\010': /* ^H */ PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); break; case '\011': /* ^I */ /* NOT \t in EBCDIC */ if (PL_inplace) Safefree(PL_inplace); if (SvOK(sv)) PL_inplace = savepv(SvPV(sv,PL_na)); else PL_inplace = Nullch; break; case '\017': /* ^O */ if (PL_osname) Safefree(PL_osname); if (SvOK(sv)) PL_osname = savepv(SvPV(sv,PL_na)); else PL_osname = Nullch; break; case '\020': /* ^P */ PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); break; case '\024': /* ^T */ #ifdef BIG_TIME PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); #else PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)); #endif break; case '\027': /* ^W */ if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ; } break; case '.': if (PL_localizing) { if (PL_localizing == 1) save_sptr((SV**)&PL_last_in_gv); } else if (SvOK(sv) && GvIO(PL_last_in_gv)) IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv); break; case '^': Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na)); IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO); break; case '~': Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na)); IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO); break; case '=': IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)); break; case '-': IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)); if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; break; case '%': IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)); break; case '|': { IO *io = GvIOp(PL_defoutgv); if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0) IoFLAGS(io) &= ~IOf_FLUSH; else { if (!(IoFLAGS(io) & IOf_FLUSH)) { PerlIO *ofp = IoOFP(io); if (ofp) (void)PerlIO_flush(ofp); IoFLAGS(io) |= IOf_FLUSH; } } } break; case '*': i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); PL_multiline = (i != 0); break; case '/': SvREFCNT_dec(PL_nrs); PL_nrs = newSVsv(sv); SvREFCNT_dec(PL_rs); PL_rs = SvREFCNT_inc(PL_nrs); break; case '\\': if (PL_ors) Safefree(PL_ors); if (SvOK(sv) || SvGMAGICAL(sv)) PL_ors = savepv(SvPV(sv,PL_orslen)); else { PL_ors = Nullch; PL_orslen = 0; } break; case ',': if (PL_ofs) Safefree(PL_ofs); PL_ofs = savepv(SvPV(sv, PL_ofslen)); break; case '#': if (PL_ofmt) Safefree(PL_ofmt); PL_ofmt = savepv(SvPV(sv,PL_na)); break; case '[': PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); break; case '?': #ifdef COMPLEX_STATUS if (PL_localizing == 2) { PL_statusvalue = LvTARGOFF(sv); PL_statusvalue_vms = LvTARGLEN(sv); } else #endif #ifdef VMSISH_STATUS if (VMSISH_STATUS) STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))); else #endif STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)); break; case '!': SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno); break; case '<': PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); if (PL_delaymagic) { PL_delaymagic |= DM_RUID; break; /* don't do magic till later */ } #ifdef HAS_SETRUID (void)setruid((Uid_t)PL_uid); #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)PL_uid, (Uid_t)-1); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1); #else if (PL_uid == PL_euid) /* special case $< = $> */ (void)PerlProc_setuid(PL_uid); else { PL_uid = (I32)PerlProc_getuid(); croak("setruid() not implemented"); } #endif #endif #endif PL_uid = (I32)PerlProc_getuid(); PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); break; case '>': PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); if (PL_delaymagic) { PL_delaymagic |= DM_EUID; break; /* don't do magic till later */ } #ifdef HAS_SETEUID (void)seteuid((Uid_t)PL_euid); #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1, (Uid_t)PL_euid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1); #else if (PL_euid == PL_uid) /* special case $> = $< */ PerlProc_setuid(PL_euid); else { PL_euid = (I32)PerlProc_geteuid(); croak("seteuid() not implemented"); } #endif #endif #endif PL_euid = (I32)PerlProc_geteuid(); PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); break; case '(': PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); if (PL_delaymagic) { PL_delaymagic |= DM_RGID; break; /* don't do magic till later */ } #ifdef HAS_SETRGID (void)setrgid((Gid_t)PL_gid); #else #ifdef HAS_SETREGID (void)setregid((Gid_t)PL_gid, (Gid_t)-1); #else #ifdef HAS_SETRESGID (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1); #else if (PL_gid == PL_egid) /* special case $( = $) */ (void)PerlProc_setgid(PL_gid); else { PL_gid = (I32)PerlProc_getgid(); croak("setrgid() not implemented"); } #endif #endif #endif PL_gid = (I32)PerlProc_getgid(); PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); break; case ')': #ifdef HAS_SETGROUPS { char *p = SvPV(sv, PL_na); Groups_t gary[NGROUPS]; SET_NUMERIC_STANDARD(); while (isSPACE(*p)) ++p; PL_egid = I_V(atof(p)); for (i = 0; i < NGROUPS; ++i) { while (*p && !isSPACE(*p)) ++p; while (isSPACE(*p)) ++p; if (!*p) break; gary[i] = I_V(atof(p)); } if (i) (void)setgroups(i, gary); } #else /* HAS_SETGROUPS */ PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv); #endif /* HAS_SETGROUPS */ if (PL_delaymagic) { PL_delaymagic |= DM_EGID; break; /* don't do magic till later */ } #ifdef HAS_SETEGID (void)setegid((Gid_t)PL_egid); #else #ifdef HAS_SETREGID (void)setregid((Gid_t)-1, (Gid_t)PL_egid); #else #ifdef HAS_SETRESGID (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1); #else if (PL_egid == PL_gid) /* special case $) = $( */ (void)PerlProc_setgid(PL_egid); else { PL_egid = (I32)PerlProc_getegid(); croak("setegid() not implemented"); } #endif #endif #endif PL_egid = (I32)PerlProc_getegid(); PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); break; case ':': PL_chopset = SvPV_force(sv,PL_na); break; case '0': if (!PL_origalen) { s = PL_origargv[0]; s += strlen(s); /* See if all the arguments are contiguous in memory */ for (i = 1; i < PL_origargc; i++) { if (PL_origargv[i] == s + 1 #ifdef OS2 || PL_origargv[i] == s + 2 #endif ) { ++s; s += strlen(s); /* this one is ok too */ } else break; } /* can grab env area too? */ if (PL_origenviron && (PL_origenviron[0] == s + 1 #ifdef OS2 || (PL_origenviron[0] == s + 9 && (s += 8)) #endif )) { my_setenv("NoNe SuCh", Nullch); /* force copy of environment */ for (i = 0; PL_origenviron[i]; i++) if (PL_origenviron[i] == s + 1) { ++s; s += strlen(s); } else break; } PL_origalen = s - PL_origargv[0]; } s = SvPV_force(sv,len); i = len; if (i >= PL_origalen) { i = PL_origalen; /* don't allow system to limit $0 seen by script */ /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */ Copy(s, PL_origargv[0], i, char); s = PL_origargv[0]+i; *s = '\0'; } else { Copy(s, PL_origargv[0], i, char); s = PL_origargv[0]+i; *s++ = '\0'; while (++i < PL_origalen) *s++ = ' '; s = PL_origargv[0]+i; for (i = 1; i < PL_origargc; i++) PL_origargv[i] = Nullch; } break; #ifdef USE_THREADS case '@': sv_setsv(thr->errsv, sv); break; #endif /* USE_THREADS */ } return 0; } #ifdef USE_THREADS int magic_mutexfree(SV *sv, MAGIC *mg) { dTHR; DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n", (unsigned long)thr, (unsigned long)sv);) if (MgOWNER(mg)) croak("panic: magic_mutexfree"); MUTEX_DESTROY(MgMUTEXP(mg)); COND_DESTROY(MgCONDP(mg)); return 0; } #endif /* USE_THREADS */ I32 whichsig(char *sig) { register char **sigv; for (sigv = PL_sig_name+1; *sigv; sigv++) if (strEQ(sig,*sigv)) return PL_sig_num[sigv - PL_sig_name]; #ifdef SIGCLD if (strEQ(sig,"CHLD")) return SIGCLD; #endif #ifdef SIGCHLD if (strEQ(sig,"CLD")) return SIGCHLD; #endif return 0; } static SV* sig_sv; STATIC void unwind_handler_stack(void *p) { dTHR; U32 flags = *(U32*)p; if (flags & 1) PL_savestack_ix -= 5; /* Unprotect save in progress. */ /* cxstack_ix-- Not needed, die already unwound it. */ if (flags & 64) SvREFCNT_dec(sig_sv); } Signal_t sighandler(int sig) { dSP; GV *gv = Nullgv; HV *st; SV *sv, *tSv = PL_Sv; CV *cv = Nullcv; OP *myop = PL_op; U32 flags = 0; I32 o_save_i = PL_savestack_ix, type; XPV *tXpv = PL_Xpv; if (PL_savestack_ix + 15 <= PL_savestack_max) flags |= 1; if (PL_markstack_ptr < PL_markstack_max - 2) flags |= 4; if (PL_retstack_ix < PL_retstack_max - 2) flags |= 8; if (PL_scopestack_ix < PL_scopestack_max - 3) flags |= 16; if (!PL_psig_ptr[sig]) die("Signal SIG%s received, but no signal handler set.\n", PL_sig_name[sig]); /* Max number of items pushed there is 3*n or 4. We cannot fix infinity, so we fix 4 (in fact 5): */ if (flags & 1) { PL_savestack_ix += 5; /* Protect save in progress. */ o_save_i = PL_savestack_ix; SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags); } if (flags & 4) PL_markstack_ptr++; /* Protect mark. */ if (flags & 8) { PL_retstack_ix++; PL_retstack[PL_retstack_ix] = NULL; } if (flags & 16) PL_scopestack_ix += 1; /* sv_2cv is too complicated, try a simpler variant first: */ if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig])) || SvTYPE(cv) != SVt_PVCV) cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE); if (!cv || !CvROOT(cv)) { if (ckWARN(WARN_SIGNAL)) warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n", PL_sig_name[sig], (gv ? GvENAME(gv) : ((cv && CvGV(cv)) ? GvENAME(CvGV(cv)) : "__ANON__"))); goto cleanup; } if(PL_psig_name[sig]) { sv = SvREFCNT_inc(PL_psig_name[sig]); flags |= 64; sig_sv = sv; } else { sv = sv_newmortal(); sv_setpv(sv,PL_sig_name[sig]); } PUSHSTACKi(PERLSI_SIGNAL); PUSHMARK(SP); PUSHs(sv); PUTBACK; perl_call_sv((SV*)cv, G_DISCARD); POPSTACK; cleanup: if (flags & 1) PL_savestack_ix -= 8; /* Unprotect save in progress. */ if (flags & 4) PL_markstack_ptr--; if (flags & 8) PL_retstack_ix--; if (flags & 16) PL_scopestack_ix -= 1; if (flags & 64) SvREFCNT_dec(sv); PL_op = myop; /* Apparently not needed... */ PL_Sv = tSv; /* Restore global temporaries. */ PL_Xpv = tXpv; return; }