3 * Copyright (c) 1991-1994, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
12 * come here, and I don't want to see no more magic,' he said, and fell silent."
18 /* Omit -- it causes too much grief on mixed systems.
30 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
31 MGVTBL* vtbl = mg->mg_virtual;
33 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
37 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
48 U32 savemagic = SvMAGICAL(sv) | SvREADONLY(sv);
50 assert(SvGMAGICAL(sv));
53 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
55 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
56 MGVTBL* vtbl = mg->mg_virtual;
57 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
58 (*vtbl->svt_get)(sv, mg);
59 if (mg->mg_flags & MGf_GSKIP)
65 SvFLAGS(sv) |= savemagic;
69 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
80 U32 savemagic = SvMAGICAL(sv);
83 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
85 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
86 MGVTBL* vtbl = mg->mg_virtual;
87 nextmg = mg->mg_moremagic; /* it may delete itself */
88 if (mg->mg_flags & MGf_GSKIP) {
89 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
92 if (vtbl && vtbl->svt_set)
93 (*vtbl->svt_set)(sv, mg);
98 SvFLAGS(sv) |= savemagic;
102 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
116 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
117 MGVTBL* vtbl = mg->mg_virtual;
118 if (vtbl && vtbl->svt_len) {
119 U32 savemagic = SvMAGICAL(sv);
122 SvFLAGS(sv) |= (SvFLAGS(sv)&(SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
124 /* omit MGf_GSKIP -- not changed here */
125 len = (*vtbl->svt_len)(sv, mg);
127 SvFLAGS(sv) |= savemagic;
129 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
135 junk = SvPV(sv, len);
144 U32 savemagic = SvMAGICAL(sv);
147 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
149 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
150 MGVTBL* vtbl = mg->mg_virtual;
151 /* omit GSKIP -- never set here */
153 if (vtbl && vtbl->svt_clear)
154 (*vtbl->svt_clear)(sv, mg);
157 SvFLAGS(sv) |= savemagic;
159 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
170 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
171 if (mg->mg_type == type)
178 mg_copy(sv, nsv, key, klen)
186 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
187 if (isUPPER(mg->mg_type)) {
188 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
201 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
202 MGVTBL* vtbl = mg->mg_virtual;
203 moremagic = mg->mg_moremagic;
204 if (vtbl && vtbl->svt_free)
205 (*vtbl->svt_free)(sv, mg);
206 if (mg->mg_ptr && mg->mg_type != 'g')
207 Safefree(mg->mg_ptr);
208 if (mg->mg_flags & MGf_REFCOUNTED)
209 SvREFCNT_dec(mg->mg_obj);
216 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
230 switch (*mg->mg_ptr) {
231 case '1': case '2': case '3': case '4':
232 case '5': case '6': case '7': case '8': case '9': case '&':
234 paren = atoi(mg->mg_ptr);
236 if (curpm->op_pmregexp &&
237 paren <= curpm->op_pmregexp->nparens &&
238 (s = curpm->op_pmregexp->startp[paren]) &&
239 (t = curpm->op_pmregexp->endp[paren]) ) {
249 paren = curpm->op_pmregexp->lastparen;
258 if (curpm->op_pmregexp &&
259 (s = curpm->op_pmregexp->subbeg) ) {
260 i = curpm->op_pmregexp->startp[0] - s;
268 if (curpm->op_pmregexp &&
269 (s = curpm->op_pmregexp->endp[0]) ) {
270 return (STRLEN) (curpm->op_pmregexp->subend - s);
275 return (STRLEN)ofslen;
277 return (STRLEN)orslen;
280 if (!SvPOK(sv) && SvNIOK(sv))
297 switch (*mg->mg_ptr) {
298 case '\001': /* ^A */
299 sv_setsv(sv, bodytarget);
301 case '\004': /* ^D */
302 sv_setiv(sv,(I32)(debug & 32767));
304 case '\006': /* ^F */
305 sv_setiv(sv,(I32)maxsysfd);
307 case '\010': /* ^H */
308 sv_setiv(sv,(I32)hints);
312 sv_setpv(sv, inplace);
314 sv_setsv(sv,&sv_undef);
316 case '\020': /* ^P */
317 sv_setiv(sv,(I32)perldb);
319 case '\024': /* ^T */
320 sv_setiv(sv,(I32)basetime);
322 case '\027': /* ^W */
323 sv_setiv(sv,(I32)dowarn);
325 case '1': case '2': case '3': case '4':
326 case '5': case '6': case '7': case '8': case '9': case '&':
328 paren = atoi(GvENAME(mg->mg_obj));
330 if (curpm->op_pmregexp &&
331 paren <= curpm->op_pmregexp->nparens &&
332 (s = curpm->op_pmregexp->startp[paren]) &&
333 (t = curpm->op_pmregexp->endp[paren]) ) {
338 if (tainting && (tmg = mg_find(sv,'t')))
339 tmg->mg_len = 0; /* guarantee $1 untainted */
344 sv_setsv(sv,&sv_undef);
348 paren = curpm->op_pmregexp->lastparen;
352 sv_setsv(sv,&sv_undef);
356 if (curpm->op_pmregexp &&
357 (s = curpm->op_pmregexp->subbeg) ) {
358 i = curpm->op_pmregexp->startp[0] - s;
365 sv_setsv(sv,&sv_undef);
369 if (curpm->op_pmregexp &&
370 (s = curpm->op_pmregexp->endp[0]) ) {
371 sv_setpvn(sv,s, curpm->op_pmregexp->subend - s);
375 sv_setsv(sv,&sv_undef);
379 if (GvIO(last_in_gv)) {
380 sv_setiv(sv,(I32)IoLINES(GvIO(last_in_gv)));
385 sv_setiv(sv,(I32)statusvalue);
388 s = IoTOP_NAME(GvIOp(defoutgv));
392 sv_setpv(sv,GvENAME(defoutgv));
397 s = IoFMT_NAME(GvIOp(defoutgv));
399 s = GvENAME(defoutgv);
404 sv_setiv(sv,(I32)IoPAGE_LEN(GvIOp(defoutgv)));
407 sv_setiv(sv,(I32)IoLINES_LEFT(GvIOp(defoutgv)));
410 sv_setiv(sv,(I32)IoPAGE(GvIOp(defoutgv)));
418 sv_setiv(sv,(I32)curcop->cop_arybase);
421 sv_setiv(sv, (IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
424 sv_setpvn(sv,ofs,ofslen);
427 sv_setpvn(sv,ors,orslen);
433 sv_setnv(sv,(double)errno);
434 sv_setpv(sv, errno ? Strerror(errno) : "");
435 SvNOK_on(sv); /* what a wonderful hack! */
438 sv_setiv(sv,(I32)uid);
441 sv_setiv(sv,(I32)euid);
445 (void)sprintf(s,"%d",(int)gid);
449 (void)sprintf(s,"%d",(int)egid);
457 Groups_t gary[NGROUPS];
459 i = getgroups(NGROUPS,gary);
461 (void)sprintf(s," %ld", (long)gary[i]);
477 magic_getuvar(sv, mg)
481 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
483 if (uf && uf->uf_val)
484 (*uf->uf_val)(uf->uf_index, sv);
497 my_setenv(mg->mg_ptr,s);
498 #ifdef DYNAMIC_ENV_FETCH
499 /* We just undefd an environment var. Is a replacement */
500 /* waiting in the wings? */
503 if (envsvp = hv_fetch(GvHVn(envgv),mg->mg_ptr,mg->mg_len,FALSE))
504 s = SvPV(*envsvp,len);
507 /* And you'll never guess what the dog had */
508 /* in its mouth... */
510 if (s && strEQ(mg->mg_ptr,"PATH")) {
511 char *strend = s + len;
514 s = cpytill(tokenbuf,s,strend,':',&i);
517 || (Stat(tokenbuf,&statbuf) && (statbuf.st_mode & 2)) )
526 magic_clearenv(sv,mg)
530 my_setenv(mg->mg_ptr,Nullch);
545 if (strEQ(s,"__DIE__"))
547 else if (strEQ(s,"__WARN__"))
549 else if (strEQ(s,"__PARSE__"))
552 croak("No such hook: %s", s);
560 i = whichsig(s); /* ...no, a brick */
562 if (dowarn || strEQ(s,"ALARM"))
563 warn("No such signal: SIG%s", s);
567 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
569 (void)signal(i,sighandler);
571 *svp = SvREFCNT_inc(sv);
574 s = SvPV_force(sv,na);
575 if (strEQ(s,"IGNORE")) {
577 (void)signal(i,SIG_IGN);
581 else if (strEQ(s,"DEFAULT") || !*s) {
583 (void)signal(i,SIG_DFL);
588 if (!strchr(s,':') && !strchr(s,'\'')) {
589 sprintf(tokenbuf, "main::%s",s);
590 sv_setpv(sv,tokenbuf);
593 (void)signal(i,sighandler);
595 *svp = SvREFCNT_inc(sv);
612 magic_setamagic(sv,mg)
616 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
621 #endif /* OVERLOAD */
624 magic_methpack(sv,mg,meth)
637 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
638 else if (mg->mg_type == 'p')
639 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
642 if (perl_call_method(meth, G_SCALAR))
643 sv_setsv(sv, *stack_sp--);
655 magic_methpack(sv,mg,"FETCH");
657 mg->mg_flags |= MGf_GSKIP;
672 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
673 else if (mg->mg_type == 'p')
674 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
678 perl_call_method("STORE", G_SCALAR|G_DISCARD);
684 magic_clearpack(sv,mg)
688 return magic_methpack(sv,mg,"DELETE");
691 int magic_wipepack(sv,mg)
701 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
707 magic_nextpack(sv,mg,key)
713 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
724 if (perl_call_method(meth, G_SCALAR))
725 sv_setsv(key, *stack_sp--);
733 magic_existspack(sv,mg)
737 return magic_methpack(sv,mg,"EXISTS");
741 magic_setdbline(sv,mg)
752 svp = av_fetch(GvAV(gv),atoi(mg->mg_ptr), FALSE);
753 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
756 warn("Can't break at that line\n");
761 magic_getarylen(sv,mg)
765 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
770 magic_setarylen(sv,mg)
774 av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
783 SV* lsv = LvTARG(sv);
785 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
786 mg = mg_find(lsv, 'g');
787 if (mg && mg->mg_len >= 0) {
788 sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
801 SV* lsv = LvTARG(sv);
807 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
808 mg = mg_find(lsv, 'g');
812 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
813 mg = mg_find(lsv, 'g');
815 else if (!SvOK(sv)) {
819 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
821 pos = SvIV(sv) - curcop->cop_arybase;
839 gv_efullname(sv,((GV*)sv));/* a gv value, be nice */
854 if (*s == '*' && s[1])
856 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
861 GvGP(sv) = gp_ref(GvGP(gv));
872 magic_setsubstr(sv,mg)
877 char *tmps = SvPV(sv,len);
878 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
883 magic_gettaint(sv,mg)
889 else if (mg->mg_len & 2 && mg->mg_obj == sv) /* kludge */
895 magic_settaint(sv,mg)
917 do_vecset(sv); /* XXX slurp this routine */
922 magic_setmglob(sv,mg)
945 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
947 if (uf && uf->uf_set)
948 (*uf->uf_set)(uf->uf_index, sv);
960 switch (*mg->mg_ptr) {
961 case '\001': /* ^A */
962 sv_setsv(bodytarget, sv);
964 case '\004': /* ^D */
965 debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
968 case '\006': /* ^F */
969 maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
971 case '\010': /* ^H */
972 hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
978 inplace = savepv(SvPV(sv,na));
982 case '\020': /* ^P */
983 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
992 case '\024': /* ^T */
993 basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
995 case '\027': /* ^W */
996 dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1000 if (localizing == 1)
1001 save_sptr((SV**)&last_in_gv);
1004 IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
1007 Safefree(IoTOP_NAME(GvIOp(defoutgv)));
1008 IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1009 IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1012 Safefree(IoFMT_NAME(GvIOp(defoutgv)));
1013 IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1014 IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1017 IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1020 IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1021 if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
1022 IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
1025 IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1028 IoFLAGS(GvIOp(defoutgv)) &= ~IOf_FLUSH;
1029 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) != 0) {
1030 IoFLAGS(GvIOp(defoutgv)) |= IOf_FLUSH;
1034 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1035 multiline = (i != 0);
1039 nrs = rs = SvPV_force(sv,rslen);
1041 if (rspara = !rslen) {
1045 nrschar = rschar = rs[rslen - 1];
1048 nrschar = rschar = 0777; /* fake a non-existent char */
1055 ors = savepv(SvPV(sv,orslen));
1060 ofs = savepv(SvPV(sv, ofslen));
1065 ofmt = savepv(SvPV(sv,na));
1068 compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1071 statusvalue = FIXSTATUS(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1074 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),SS$_ABORT); /* will anyone ever use this? */
1077 uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1079 delaymagic |= DM_RUID;
1080 break; /* don't do magic till later */
1083 (void)setruid((Uid_t)uid);
1086 (void)setreuid((Uid_t)uid, (Uid_t)-1);
1088 #ifdef HAS_SETRESUID
1089 (void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
1091 if (uid == euid) /* special case $< = $> */
1094 uid = (I32)getuid();
1095 croak("setruid() not implemented");
1100 uid = (I32)getuid();
1101 tainting |= (uid && (euid != uid || egid != gid));
1104 euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1106 delaymagic |= DM_EUID;
1107 break; /* don't do magic till later */
1110 (void)seteuid((Uid_t)euid);
1113 (void)setreuid((Uid_t)-1, (Uid_t)euid);
1115 #ifdef HAS_SETRESUID
1116 (void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
1118 if (euid == uid) /* special case $> = $< */
1121 euid = (I32)geteuid();
1122 croak("seteuid() not implemented");
1127 euid = (I32)geteuid();
1128 tainting |= (uid && (euid != uid || egid != gid));
1131 gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1133 delaymagic |= DM_RGID;
1134 break; /* don't do magic till later */
1137 (void)setrgid((Gid_t)gid);
1140 (void)setregid((Gid_t)gid, (Gid_t)-1);
1142 #ifdef HAS_SETRESGID
1143 (void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
1145 if (gid == egid) /* special case $( = $) */
1148 gid = (I32)getgid();
1149 croak("setrgid() not implemented");
1154 gid = (I32)getgid();
1155 tainting |= (uid && (euid != uid || egid != gid));
1158 egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1160 delaymagic |= DM_EGID;
1161 break; /* don't do magic till later */
1164 (void)setegid((Gid_t)egid);
1167 (void)setregid((Gid_t)-1, (Gid_t)egid);
1169 #ifdef HAS_SETRESGID
1170 (void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
1172 if (egid == gid) /* special case $) = $( */
1175 egid = (I32)getegid();
1176 croak("setegid() not implemented");
1181 egid = (I32)getegid();
1182 tainting |= (uid && (euid != uid || egid != gid));
1185 chopset = SvPV_force(sv,na);
1191 /* See if all the arguments are contiguous in memory */
1192 for (i = 1; i < origargc; i++) {
1193 if (origargv[i] == s + 1)
1194 s += strlen(++s); /* this one is ok too */
1196 if (origenviron[0] == s + 1) { /* can grab env area too? */
1197 my_setenv("NoNeSuCh", Nullch);
1198 /* force copy of environment */
1199 for (i = 0; origenviron[i]; i++)
1200 if (origenviron[i] == s + 1)
1203 origalen = s - origargv[0];
1205 s = SvPV_force(sv,len);
1207 if (i >= origalen) {
1211 Copy(s, origargv[0], i, char);
1214 Copy(s, origargv[0], i, char);
1217 while (++i < origalen)
1220 for (i = 1; i < origargc; i++)
1221 origargv[i] = Nullch;
1232 register char **sigv;
1234 for (sigv = sig_name+1; *sigv; sigv++)
1235 if (strEQ(sig,*sigv))
1236 return sig_num[sigv - sig_name];
1238 if (strEQ(sig,"CHLD"))
1242 if (strEQ(sig,"CLD"))
1260 #ifdef OS2 /* or anybody else who requires SIG_ACK */
1261 signal(sig, SIG_ACK);
1264 signame = sig_name[sig];
1265 cv = sv_2cv(*hv_fetch(GvHVn(siggv),signame,strlen(signame),
1268 if (!cv || !CvROOT(cv) &&
1269 *signame == 'C' && instr(signame,"LD")) {
1271 if (signame[1] == 'H')
1272 cv = sv_2cv(*hv_fetch(GvHVn(siggv),"CLD",3,TRUE),
1275 cv = sv_2cv(*hv_fetch(GvHVn(siggv),"CHLD",4,TRUE),
1279 if (!cv || !CvROOT(cv)) {
1281 warn("SIG%s handler \"%s\" not defined.\n",
1282 signame, GvENAME(gv) );
1287 if (stack != signalstack)
1288 AvFILL(signalstack) = 0;
1289 SWITCHSTACK(stack, signalstack);
1291 sv = sv_newmortal();
1292 sv_setpv(sv,signame);
1297 perl_call_sv((SV*)cv, G_DISCARD);
1299 SWITCHSTACK(signalstack, oldstack);