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Replace pattern parsing logic with optree "parsing" logic.
[perl5.git] / mg.c
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a0d0e21e 1/* mg.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
7272f7c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
12 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent."
79072805
LW
14 */
15
ccfc67b7
JH
16/*
17=head1 Magical Functions
166f8a29
DM
18
19"Magic" is special data attached to SV structures in order to give them
20"magical" properties. When any Perl code tries to read from, or assign to,
21an SV marked as magical, it calls the 'get' or 'set' function associated
22with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 23give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
24number of the last read filehandle into to the SV's IV slot), while
25set is called after an SV has been written to, in order to allow it to make
ddfa107c 26use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
27PL_rs global variable).
28
29Magic is implemented as a linked list of MAGIC structures attached to the
30SV. Each MAGIC struct holds the type of the magic, a pointer to an array
31of functions that implement the get(), set(), length() etc functions,
32plus space for some flags and pointers. For example, a tied variable has
33a MAGIC structure that contains a pointer to the object associated with the
34tie.
35
ccfc67b7
JH
36*/
37
79072805 38#include "EXTERN.h"
864dbfa3 39#define PERL_IN_MG_C
79072805
LW
40#include "perl.h"
41
5cd24f17 42#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
43# ifdef I_GRP
44# include <grp.h>
45# endif
188ea221
CS
46#endif
47
757f63d8
SP
48#if defined(HAS_SETGROUPS)
49# ifndef NGROUPS
50# define NGROUPS 32
51# endif
52#endif
53
17aa7f3d
JH
54#ifdef __hpux
55# include <sys/pstat.h>
56#endif
57
8aad04aa
JH
58#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
59Signal_t Perl_csighandler(int sig, ...);
60#else
e69880a5 61Signal_t Perl_csighandler(int sig);
8aad04aa 62#endif
e69880a5 63
9cffb111
OS
64#ifdef __Lynx__
65/* Missing protos on LynxOS */
66void setruid(uid_t id);
67void seteuid(uid_t id);
68void setrgid(uid_t id);
69void setegid(uid_t id);
70#endif
71
c07a80fd
PP
72/*
73 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
74 */
75
76struct magic_state {
77 SV* mgs_sv;
78 U32 mgs_flags;
455ece5e 79 I32 mgs_ss_ix;
c07a80fd 80};
455ece5e 81/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
82
83STATIC void
8fb26106 84S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 85{
97aff369 86 dVAR;
455ece5e 87 MGS* mgs;
c07a80fd 88 assert(SvMAGICAL(sv));
d8b2590f
NC
89 /* Turning READONLY off for a copy-on-write scalar (including shared
90 hash keys) is a bad idea. */
765f542d 91 if (SvIsCOW(sv))
9a265e59 92 sv_force_normal_flags(sv, 0);
c07a80fd 93
8772537c 94 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
95
96 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd
PP
97 mgs->mgs_sv = sv;
98 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
455ece5e 99 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
c07a80fd
PP
100
101 SvMAGICAL_off(sv);
102 SvREADONLY_off(sv);
085bde85
NC
103 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
104 /* No public flags are set, so promote any private flags to public. */
105 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
106 }
c07a80fd
PP
107}
108
954c1994
GS
109/*
110=for apidoc mg_magical
111
112Turns on the magical status of an SV. See C<sv_magic>.
113
114=cut
115*/
116
8990e307 117void
864dbfa3 118Perl_mg_magical(pTHX_ SV *sv)
8990e307 119{
e1ec3a88 120 const MAGIC* mg;
96a5add6 121 PERL_UNUSED_CONTEXT;
8990e307 122 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 123 const MGVTBL* const vtbl = mg->mg_virtual;
8990e307 124 if (vtbl) {
2b260de0 125 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
8990e307
LW
126 SvGMAGICAL_on(sv);
127 if (vtbl->svt_set)
128 SvSMAGICAL_on(sv);
2b260de0 129 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
8990e307
LW
130 SvRMAGICAL_on(sv);
131 }
132 }
133}
134
2767dea0
DM
135
136/* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
137
138STATIC bool
139S_is_container_magic(const MAGIC *mg)
140{
141 switch (mg->mg_type) {
142 case PERL_MAGIC_bm:
143 case PERL_MAGIC_fm:
144 case PERL_MAGIC_regex_global:
145 case PERL_MAGIC_nkeys:
146#ifdef USE_LOCALE_COLLATE
147 case PERL_MAGIC_collxfrm:
148#endif
149 case PERL_MAGIC_qr:
150 case PERL_MAGIC_taint:
151 case PERL_MAGIC_vec:
152 case PERL_MAGIC_vstring:
153 case PERL_MAGIC_utf8:
154 case PERL_MAGIC_substr:
155 case PERL_MAGIC_defelem:
156 case PERL_MAGIC_arylen:
157 case PERL_MAGIC_pos:
158 case PERL_MAGIC_backref:
159 case PERL_MAGIC_arylen_p:
160 case PERL_MAGIC_rhash:
161 case PERL_MAGIC_symtab:
162 return 0;
163 default:
164 return 1;
165 }
166}
167
954c1994
GS
168/*
169=for apidoc mg_get
170
171Do magic after a value is retrieved from the SV. See C<sv_magic>.
172
173=cut
174*/
175
79072805 176int
864dbfa3 177Perl_mg_get(pTHX_ SV *sv)
79072805 178{
97aff369 179 dVAR;
35a4481c 180 const I32 mgs_ix = SSNEW(sizeof(MGS));
fe2774ed 181 const bool was_temp = (bool)SvTEMP(sv);
0723351e 182 int have_new = 0;
ff76feab 183 MAGIC *newmg, *head, *cur, *mg;
20135930 184 /* guard against sv having being freed midway by holding a private
6683b158
NC
185 reference. */
186
187 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
188 cause the SV's buffer to get stolen (and maybe other stuff).
189 So restore it.
190 */
46da273f 191 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC
192 if (!was_temp) {
193 SvTEMP_off(sv);
194 }
195
455ece5e 196 save_magic(mgs_ix, sv);
463ee0b2 197
ff76feab
AMS
198 /* We must call svt_get(sv, mg) for each valid entry in the linked
199 list of magic. svt_get() may delete the current entry, add new
200 magic to the head of the list, or upgrade the SV. AMS 20010810 */
201
202 newmg = cur = head = mg = SvMAGIC(sv);
203 while (mg) {
35a4481c 204 const MGVTBL * const vtbl = mg->mg_virtual;
ff76feab 205
2b260de0 206 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 207 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 208
58f82c5c
DM
209 /* guard against magic having been deleted - eg FETCH calling
210 * untie */
211 if (!SvMAGIC(sv))
212 break;
b77f7d40 213
ff76feab
AMS
214 /* Don't restore the flags for this entry if it was deleted. */
215 if (mg->mg_flags & MGf_GSKIP)
216 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
a0d0e21e 217 }
ff76feab
AMS
218
219 mg = mg->mg_moremagic;
220
0723351e 221 if (have_new) {
ff76feab
AMS
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
224 if (mg == head) {
0723351e 225 have_new = 0;
ff76feab
AMS
226 mg = cur;
227 head = newmg;
228 }
229 }
230
231 /* Were any new entries added? */
0723351e
NC
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
233 have_new = 1;
ff76feab
AMS
234 cur = mg;
235 mg = newmg;
760ac839 236 }
79072805 237 }
463ee0b2 238
8772537c 239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC
240
241 if (SvREFCNT(sv) == 1) {
242 /* We hold the last reference to this SV, which implies that the
243 SV was deleted as a side effect of the routines we called. */
0c34ef67 244 SvOK_off(sv);
6683b158 245 }
79072805
LW
246 return 0;
247}
248
954c1994
GS
249/*
250=for apidoc mg_set
251
252Do magic after a value is assigned to the SV. See C<sv_magic>.
253
254=cut
255*/
256
79072805 257int
864dbfa3 258Perl_mg_set(pTHX_ SV *sv)
79072805 259{
97aff369 260 dVAR;
35a4481c 261 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 262 MAGIC* mg;
463ee0b2
LW
263 MAGIC* nextmg;
264
455ece5e 265 save_magic(mgs_ix, sv);
463ee0b2
LW
266
267 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 268 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 269 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
270 if (mg->mg_flags & MGf_GSKIP) {
271 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
455ece5e 272 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
a0d0e21e 273 }
e7cbf6c6
DM
274 if (PL_localizing == 2 && !S_is_container_magic(mg))
275 continue;
2b260de0 276 if (vtbl && vtbl->svt_set)
fc0dc3b3 277 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 278 }
463ee0b2 279
8772537c 280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
281 return 0;
282}
283
954c1994
GS
284/*
285=for apidoc mg_length
286
287Report on the SV's length. See C<sv_magic>.
288
289=cut
290*/
291
79072805 292U32
864dbfa3 293Perl_mg_length(pTHX_ SV *sv)
79072805 294{
97aff369 295 dVAR;
79072805 296 MAGIC* mg;
463ee0b2 297 STRLEN len;
463ee0b2 298
79072805 299 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 300 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 301 if (vtbl && vtbl->svt_len) {
35a4481c 302 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 303 save_magic(mgs_ix, sv);
a0d0e21e 304 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 305 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 306 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
307 return len;
308 }
309 }
310
35a4481c 311 if (DO_UTF8(sv)) {
10516c54 312 const U8 *s = (U8*)SvPV_const(sv, len);
f5a63d97 313 len = utf8_length(s, s + len);
5636d518
DB
314 }
315 else
10516c54 316 (void)SvPV_const(sv, len);
463ee0b2 317 return len;
79072805
LW
318}
319
8fb26106 320I32
864dbfa3 321Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
322{
323 MAGIC* mg;
ac27b0f5 324
93965878 325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 326 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 327 if (vtbl && vtbl->svt_len) {
35a4481c
AL
328 const I32 mgs_ix = SSNEW(sizeof(MGS));
329 I32 len;
455ece5e 330 save_magic(mgs_ix, sv);
93965878 331 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 332 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 333 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
334 return len;
335 }
336 }
337
338 switch(SvTYPE(sv)) {
339 case SVt_PVAV:
35a4481c 340 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
93965878
NIS
341 case SVt_PVHV:
342 /* FIXME */
343 default:
cea2e8a9 344 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
345 break;
346 }
347 return 0;
348}
349
954c1994
GS
350/*
351=for apidoc mg_clear
352
353Clear something magical that the SV represents. See C<sv_magic>.
354
355=cut
356*/
357
79072805 358int
864dbfa3 359Perl_mg_clear(pTHX_ SV *sv)
79072805 360{
35a4481c 361 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 362 MAGIC* mg;
463ee0b2 363
455ece5e 364 save_magic(mgs_ix, sv);
463ee0b2 365
79072805 366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 367 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 368 /* omit GSKIP -- never set here */
727405f8 369
2b260de0 370 if (vtbl && vtbl->svt_clear)
fc0dc3b3 371 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 372 }
463ee0b2 373
8772537c 374 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
375 return 0;
376}
377
954c1994
GS
378/*
379=for apidoc mg_find
380
381Finds the magic pointer for type matching the SV. See C<sv_magic>.
382
383=cut
384*/
385
93a17b20 386MAGIC*
35a4481c 387Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 388{
96a5add6 389 PERL_UNUSED_CONTEXT;
35a4481c
AL
390 if (sv) {
391 MAGIC *mg;
392 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
393 if (mg->mg_type == type)
394 return mg;
395 }
93a17b20 396 }
5f66b61c 397 return NULL;
93a17b20
LW
398}
399
954c1994
GS
400/*
401=for apidoc mg_copy
402
403Copies the magic from one SV to another. See C<sv_magic>.
404
405=cut
406*/
407
79072805 408int
864dbfa3 409Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 410{
463ee0b2 411 int count = 0;
79072805 412 MAGIC* mg;
463ee0b2 413 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 414 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS
415 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
416 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
417 }
823a54a3
AL
418 else {
419 const char type = mg->mg_type;
1e73acc8 420 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
421 sv_magic(nsv,
422 (type == PERL_MAGIC_tied)
423 ? SvTIED_obj(sv, mg)
424 : (type == PERL_MAGIC_regdata && mg->mg_obj)
425 ? sv
426 : mg->mg_obj,
427 toLOWER(type), key, klen);
428 count++;
429 }
79072805 430 }
79072805 431 }
463ee0b2 432 return count;
79072805
LW
433}
434
954c1994 435/*
0cbee0a4
DM
436=for apidoc mg_localize
437
438Copy some of the magic from an existing SV to new localized version of
439that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
440doesn't (eg taint, pos).
441
442=cut
443*/
444
445void
446Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
447{
97aff369 448 dVAR;
0cbee0a4
DM
449 MAGIC *mg;
450 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 451 const MGVTBL* const vtbl = mg->mg_virtual;
2767dea0 452 if (!S_is_container_magic(mg))
0cbee0a4 453 continue;
0cbee0a4 454
a5063e7c
DM
455 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
456 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
457 else
0cbee0a4
DM
458 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
459 mg->mg_ptr, mg->mg_len);
a5063e7c 460
0cbee0a4
DM
461 /* container types should remain read-only across localization */
462 SvFLAGS(nsv) |= SvREADONLY(sv);
463 }
464
465 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
466 SvFLAGS(nsv) |= SvMAGICAL(sv);
467 PL_localizing = 1;
468 SvSETMAGIC(nsv);
469 PL_localizing = 0;
470 }
471}
472
473/*
954c1994
GS
474=for apidoc mg_free
475
476Free any magic storage used by the SV. See C<sv_magic>.
477
478=cut
479*/
480
79072805 481int
864dbfa3 482Perl_mg_free(pTHX_ SV *sv)
79072805
LW
483{
484 MAGIC* mg;
485 MAGIC* moremagic;
486 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 487 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 488 moremagic = mg->mg_moremagic;
2b260de0 489 if (vtbl && vtbl->svt_free)
fc0dc3b3 490 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 491 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 492 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 493 Safefree(mg->mg_ptr);
565764a8 494 else if (mg->mg_len == HEf_SVKEY)
88e89b8a 495 SvREFCNT_dec((SV*)mg->mg_ptr);
d460ef45 496 }
b881518d
JH
497 if (mg->mg_flags & MGf_REFCOUNTED)
498 SvREFCNT_dec(mg->mg_obj);
79072805
LW
499 Safefree(mg);
500 }
b162af07 501 SvMAGIC_set(sv, NULL);
79072805
LW
502 return 0;
503}
504
79072805 505#include <signal.h>
79072805 506
942e002e 507U32
864dbfa3 508Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 509{
97aff369 510 dVAR;
8772537c 511 PERL_UNUSED_ARG(sv);
6cef1e77 512
0bd48802
AL
513 if (PL_curpm) {
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
515 if (rx) {
a678b0e4
YO
516 if (mg->mg_obj) { /* @+ */
517 /* return the number possible */
518 return rx->nparens;
519 } else { /* @- */
520 I32 paren = rx->lastparen;
521
522 /* return the last filled */
f46c4081 523 while ( paren >= 0
f0ab9afb
NC
524 && (rx->offs[paren].start == -1
525 || rx->offs[paren].end == -1) )
f46c4081 526 paren--;
a678b0e4
YO
527 return (U32)paren;
528 }
0bd48802 529 }
8f580fb8 530 }
ac27b0f5 531
942e002e 532 return (U32)-1;
6cef1e77
IZ
533}
534
535int
864dbfa3 536Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 537{
97aff369 538 dVAR;
0bd48802
AL
539 if (PL_curpm) {
540 register const REGEXP * const rx = PM_GETRE(PL_curpm);
541 if (rx) {
542 register const I32 paren = mg->mg_len;
543 register I32 s;
544 register I32 t;
545 if (paren < 0)
546 return 0;
547 if (paren <= (I32)rx->nparens &&
f0ab9afb
NC
548 (s = rx->offs[paren].start) != -1 &&
549 (t = rx->offs[paren].end) != -1)
0bd48802
AL
550 {
551 register I32 i;
552 if (mg->mg_obj) /* @+ */
553 i = t;
554 else /* @- */
555 i = s;
556
557 if (i > 0 && RX_MATCH_UTF8(rx)) {
558 const char * const b = rx->subbeg;
559 if (b)
f5a63d97 560 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 561 }
727405f8 562
0bd48802 563 sv_setiv(sv, i);
1aa99e6b 564 }
0bd48802 565 }
6cef1e77
IZ
566 }
567 return 0;
568}
569
e4b89193 570int
a29d06ed
MG
571Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
572{
d4c19fe8
AL
573 PERL_UNUSED_ARG(sv);
574 PERL_UNUSED_ARG(mg);
a29d06ed 575 Perl_croak(aTHX_ PL_no_modify);
0dbb1585 576 NORETURN_FUNCTION_END;
a29d06ed
MG
577}
578
93a17b20 579U32
864dbfa3 580Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 581{
97aff369 582 dVAR;
93a17b20 583 register I32 paren;
93a17b20 584 register I32 i;
2fdbfb4d
AB
585 register const REGEXP * rx;
586 const char * const remaining = mg->mg_ptr + 1;
93a17b20
LW
587
588 switch (*mg->mg_ptr) {
2fdbfb4d
AB
589 case '\020':
590 if (*remaining == '\0') { /* ^P */
591 break;
592 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
593 goto do_prematch;
594 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
595 goto do_postmatch;
596 }
597 break;
598 case '\015': /* $^MATCH */
599 if (strEQ(remaining, "ATCH")) {
600 goto do_match;
601 } else {
602 break;
603 }
604 case '`':
605 do_prematch:
192b9cd1 606 paren = RXf_PREMATCH;
2fdbfb4d
AB
607 goto maybegetparen;
608 case '\'':
609 do_postmatch:
192b9cd1 610 paren = RXf_POSTMATCH;
2fdbfb4d
AB
611 goto maybegetparen;
612 case '&':
613 do_match:
192b9cd1 614 paren = RXf_MATCH;
2fdbfb4d 615 goto maybegetparen;
93a17b20 616 case '1': case '2': case '3': case '4':
2fdbfb4d
AB
617 case '5': case '6': case '7': case '8': case '9':
618 paren = atoi(mg->mg_ptr);
619 maybegetparen:
aaa362c4 620 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
621 getparen:
622 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 623
ffc61ed2 624 if (i < 0)
0844c848 625 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 626 return i;
2fdbfb4d 627 } else {
235bddc8 628 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 629 report_uninit(sv);
2fdbfb4d 630 return 0;
93a17b20 631 }
93a17b20 632 case '+':
aaa362c4 633 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 634 paren = rx->lastparen;
13f57bf8
CS
635 if (paren)
636 goto getparen;
93a17b20 637 }
748a9306 638 return 0;
a01268b5
JH
639 case '\016': /* ^N */
640 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
641 paren = rx->lastcloseparen;
642 if (paren)
643 goto getparen;
644 }
645 return 0;
93a17b20
LW
646 }
647 magic_get(sv,mg);
2d8e6c8d 648 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 649 sv_2pv(sv, 0);
2d8e6c8d 650 }
93a17b20
LW
651 if (SvPOK(sv))
652 return SvCUR(sv);
653 return 0;
654}
655
ad3296c6 656#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
657 if (SvPOK(sv)) { \
658 STRLEN len = SvCUR(sv); \
659 char * const p = SvPVX(sv); \
8e6b4db6
PC
660 while (len > 0 && isSPACE(p[len-1])) \
661 --len; \
662 SvCUR_set(sv, len); \
663 p[len] = '\0'; \
664 } \
ad3296c6
SH
665} STMT_END
666
8b850bd5
NC
667void
668Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
669{
670 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
671 sv_setsv(sv, &PL_sv_undef);
672 else {
673 sv_setpvs(sv, "");
674 SvUTF8_off(sv);
675 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
676 SV *const value = Perl_refcounted_he_fetch(aTHX_
677 c->cop_hints_hash,
678 0, "open<", 5, 0, 0);
679 assert(value);
680 sv_catsv(sv, value);
681 }
682 sv_catpvs(sv, "\0");
683 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
684 SV *const value = Perl_refcounted_he_fetch(aTHX_
685 c->cop_hints_hash,
686 0, "open>", 5, 0, 0);
687 assert(value);
688 sv_catsv(sv, value);
689 }
690 }
691}
692
79072805 693int
864dbfa3 694Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 695{
27da23d5 696 dVAR;
79072805 697 register I32 paren;
35272f84 698 register char *s = NULL;
d9f97599 699 register REGEXP *rx;
823a54a3
AL
700 const char * const remaining = mg->mg_ptr + 1;
701 const char nextchar = *remaining;
79072805
LW
702
703 switch (*mg->mg_ptr) {
748a9306 704 case '\001': /* ^A */
3280af22 705 sv_setsv(sv, PL_bodytarget);
748a9306 706 break;
e5218da5 707 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 708 if (nextchar == '\0') {
e5218da5
GA
709 sv_setiv(sv, (IV)PL_minus_c);
710 }
823a54a3 711 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
712 sv_setiv(sv, (IV)STATUS_NATIVE);
713 }
49460fe6
NIS
714 break;
715
79072805 716 case '\004': /* ^D */
aea4f609 717 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 718 break;
28f23441 719 case '\005': /* ^E */
823a54a3 720 if (nextchar == '\0') {
4b645107 721#if defined(MACOS_TRADITIONAL)
0a378802
JH
722 {
723 char msg[256];
727405f8 724
0a378802 725 sv_setnv(sv,(double)gMacPerl_OSErr);
727405f8 726 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
0a378802 727 }
4b645107 728#elif defined(VMS)
0a378802
JH
729 {
730# include <descrip.h>
731# include <starlet.h>
732 char msg[255];
733 $DESCRIPTOR(msgdsc,msg);
734 sv_setnv(sv,(NV) vaxc$errno);
735 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
736 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
737 else
c69006e4 738 sv_setpvn(sv,"",0);
0a378802 739 }
4b645107 740#elif defined(OS2)
0a378802
JH
741 if (!(_emx_env & 0x200)) { /* Under DOS */
742 sv_setnv(sv, (NV)errno);
743 sv_setpv(sv, errno ? Strerror(errno) : "");
744 } else {
745 if (errno != errno_isOS2) {
823a54a3 746 const int tmp = _syserrno();
0a378802
JH
747 if (tmp) /* 2nd call to _syserrno() makes it 0 */
748 Perl_rc = tmp;
749 }
750 sv_setnv(sv, (NV)Perl_rc);
751 sv_setpv(sv, os2error(Perl_rc));
752 }
4b645107 753#elif defined(WIN32)
0a378802 754 {
d4c19fe8 755 const DWORD dwErr = GetLastError();
0a378802 756 sv_setnv(sv, (NV)dwErr);
823a54a3 757 if (dwErr) {
0a378802
JH
758 PerlProc_GetOSError(sv, dwErr);
759 }
760 else
c69006e4 761 sv_setpvn(sv, "", 0);
0a378802
JH
762 SetLastError(dwErr);
763 }
22fae026 764#else
f6c8f21d 765 {
8772537c 766 const int saveerrno = errno;
f6c8f21d 767 sv_setnv(sv, (NV)errno);
666ea192 768 sv_setpv(sv, errno ? Strerror(errno) : "");
f6c8f21d
RGS
769 errno = saveerrno;
770 }
28f23441 771#endif
ad3296c6 772 SvRTRIM(sv);
0a378802
JH
773 SvNOK_on(sv); /* what a wonderful hack! */
774 }
823a54a3 775 else if (strEQ(remaining, "NCODING"))
0a378802
JH
776 sv_setsv(sv, PL_encoding);
777 break;
79072805 778 case '\006': /* ^F */
3280af22 779 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 780 break;
a0d0e21e 781 case '\010': /* ^H */
3280af22 782 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 783 break;
9d116dd7 784 case '\011': /* ^I */ /* NOT \t in EBCDIC */
3280af22
NIS
785 if (PL_inplace)
786 sv_setpv(sv, PL_inplace);
79072805 787 else
3280af22 788 sv_setsv(sv, &PL_sv_undef);
79072805 789 break;
ac27b0f5 790 case '\017': /* ^O & ^OPEN */
823a54a3 791 if (nextchar == '\0') {
ac27b0f5 792 sv_setpv(sv, PL_osname);
3511154c
DM
793 SvTAINTED_off(sv);
794 }
823a54a3 795 else if (strEQ(remaining, "PEN")) {
8b850bd5 796 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 797 }
28f23441 798 break;
cde0cee5
YO
799 case '\020':
800 if (nextchar == '\0') { /* ^P */
801 sv_setiv(sv, (IV)PL_perldb);
802 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
803 goto do_prematch_fetch;
804 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
805 goto do_postmatch_fetch;
806 }
79072805 807 break;
fb73857a 808 case '\023': /* ^S */
823a54a3 809 if (nextchar == '\0') {
bc177e6b 810 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 811 SvOK_off(sv);
3280af22 812 else if (PL_in_eval)
6dc8a9e4 813 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
814 else
815 sv_setiv(sv, 0);
d58bf5aa 816 }
fb73857a 817 break;
79072805 818 case '\024': /* ^T */
823a54a3 819 if (nextchar == '\0') {
88e89b8a 820#ifdef BIG_TIME
7c36658b 821 sv_setnv(sv, PL_basetime);
88e89b8a 822#else
7c36658b 823 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 824#endif
7c36658b 825 }
823a54a3 826 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
827 sv_setiv(sv, PL_tainting
828 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
829 : 0);
7c36658b 830 break;
e07ea26a 831 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 832 if (strEQ(remaining, "NICODE"))
a05d7ebb 833 sv_setuv(sv, (UV) PL_unicode);
823a54a3 834 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 835 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
836 else if (strEQ(remaining, "TF8CACHE"))
837 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
838 break;
839 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 840 if (nextchar == '\0')
4438c4b7 841 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 842 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 843 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 844 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
845 }
846 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH
847 sv_setpvn(
848 sv,
849 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
850 WARNsize
851 );
013b78e8 852 }
d3a7d8c7 853 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
854 /* Get the bit mask for $warnings::Bits{all}, because
855 * it could have been extended by warnings::register */
823a54a3 856 HV * const bits=get_hv("warnings::Bits", FALSE);
f5a63d97
AL
857 if (bits) {
858 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
859 if (bits_all)
860 sv_setsv(sv, *bits_all);
75b6c4ca
RGS
861 }
862 else {
863 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
864 }
ac27b0f5 865 }
4438c4b7 866 else {
72dc9ed5
NC
867 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
868 *PL_compiling.cop_warnings);
ac27b0f5 869 }
d3a7d8c7 870 SvPOK_only(sv);
4438c4b7 871 }
79072805 872 break;
cde0cee5
YO
873 case '\015': /* $^MATCH */
874 if (strEQ(remaining, "ATCH")) {
79072805
LW
875 case '1': case '2': case '3': case '4':
876 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
877 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
878 /*
879 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
880 * XXX Does the new way break anything?
881 */
882 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 883 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO
884 break;
885 }
886 sv_setsv(sv,&PL_sv_undef);
79072805
LW
887 }
888 break;
889 case '+':
aaa362c4 890 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 891 if (rx->lastparen) {
2fdbfb4d 892 CALLREG_NUMBUF_FETCH(rx,rx->lastparen,sv);
44a2ac75
YO
893 break;
894 }
79072805 895 }
3280af22 896 sv_setsv(sv,&PL_sv_undef);
79072805 897 break;
a01268b5
JH
898 case '\016': /* ^N */
899 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 900 if (rx->lastcloseparen) {
2fdbfb4d 901 CALLREG_NUMBUF_FETCH(rx,rx->lastcloseparen,sv);
44a2ac75
YO
902 break;
903 }
904
a01268b5
JH
905 }
906 sv_setsv(sv,&PL_sv_undef);
907 break;
79072805 908 case '`':
cde0cee5 909 do_prematch_fetch:
aaa362c4 910 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 911 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 912 break;
79072805 913 }
3280af22 914 sv_setsv(sv,&PL_sv_undef);
79072805
LW
915 break;
916 case '\'':
cde0cee5 917 do_postmatch_fetch:
aaa362c4 918 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 919 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 920 break;
79072805 921 }
3280af22 922 sv_setsv(sv,&PL_sv_undef);
79072805
LW
923 break;
924 case '.':
3280af22 925 if (GvIO(PL_last_in_gv)) {
357c8808 926 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 927 }
79072805
LW
928 break;
929 case '?':
809a5acc 930 {
809a5acc 931 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 932#ifdef COMPLEX_STATUS
6b88bc9c
GS
933 LvTARGOFF(sv) = PL_statusvalue;
934 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 935#endif
809a5acc 936 }
79072805
LW
937 break;
938 case '^':
0daa599b
RGS
939 if (GvIOp(PL_defoutgv))
940 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
941 if (s)
942 sv_setpv(sv,s);
943 else {
3280af22 944 sv_setpv(sv,GvENAME(PL_defoutgv));
79072805
LW
945 sv_catpv(sv,"_TOP");
946 }
947 break;
948 case '~':
0daa599b
RGS
949 if (GvIOp(PL_defoutgv))
950 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 951 if (!s)
3280af22 952 s = GvENAME(PL_defoutgv);
79072805
LW
953 sv_setpv(sv,s);
954 break;
79072805 955 case '=':
0daa599b
RGS
956 if (GvIOp(PL_defoutgv))
957 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
958 break;
959 case '-':
0daa599b
RGS
960 if (GvIOp(PL_defoutgv))
961 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
962 break;
963 case '%':
0daa599b
RGS
964 if (GvIOp(PL_defoutgv))
965 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 966 break;
79072805
LW
967 case ':':
968 break;
969 case '/':
970 break;
971 case '[':
11206fdd 972 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW
973 break;
974 case '|':
0daa599b
RGS
975 if (GvIOp(PL_defoutgv))
976 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
977 break;
978 case ',':
79072805
LW
979 break;
980 case '\\':
b2ce0fda 981 if (PL_ors_sv)
f28098ff 982 sv_copypv(sv, PL_ors_sv);
79072805 983 break;
79072805 984 case '!':
a5f75d66 985#ifdef VMS
65202027 986 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 987 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 988#else
88e89b8a 989 {
8772537c 990 const int saveerrno = errno;
65202027 991 sv_setnv(sv, (NV)errno);
88e89b8a 992#ifdef OS2
ed344e4f
IZ
993 if (errno == errno_isOS2 || errno == errno_isOS2_set)
994 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 995 else
a5f75d66 996#endif
666ea192 997 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
998 errno = saveerrno;
999 }
1000#endif
ad3296c6 1001 SvRTRIM(sv);
946ec16e 1002 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1003 break;
1004 case '<':
3280af22 1005 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1006 break;
1007 case '>':
3280af22 1008 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1009 break;
1010 case '(':
3280af22 1011 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1012 goto add_groups;
1013 case ')':
3280af22 1014 sv_setiv(sv, (IV)PL_egid);
79072805 1015 add_groups:
79072805 1016#ifdef HAS_GETGROUPS
79072805 1017 {
57d7c65e 1018 Groups_t *gary = NULL;
fb45abb2 1019 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1020 Newx(gary, num_groups, Groups_t);
1021 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1022 for (i = 0; i < num_groups; i++)
1023 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1024 Safefree(gary);
79072805 1025 }
155aba94 1026 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1027#endif
79072805 1028 break;
cd39f2b6 1029#ifndef MACOS_TRADITIONAL
79072805
LW
1030 case '0':
1031 break;
cd39f2b6 1032#endif
79072805 1033 }
a0d0e21e 1034 return 0;
79072805
LW
1035}
1036
1037int
864dbfa3 1038Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1039{
8772537c 1040 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1041
1042 if (uf && uf->uf_val)
24f81a43 1043 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1044 return 0;
1045}
1046
1047int
864dbfa3 1048Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1049{
27da23d5 1050 dVAR;
9ae3433d 1051 STRLEN len = 0, klen;
666ea192 1052 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1053 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1054 my_setenv(ptr, s);
1e422769 1055
a0d0e21e
LW
1056#ifdef DYNAMIC_ENV_FETCH
1057 /* We just undefd an environment var. Is a replacement */
1058 /* waiting in the wings? */
1059 if (!len) {
fabdb6c0
AL
1060 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1061 if (valp)
4ab59fcc 1062 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1063 }
1064#endif
1e422769 1065
39e571d4 1066#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1067 /* And you'll never guess what the dog had */
1068 /* in its mouth... */
3280af22 1069 if (PL_tainting) {
1e422769
PP
1070 MgTAINTEDDIR_off(mg);
1071#ifdef VMS
5aabfad6 1072 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1073 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1074 Stat_t sbuf;
1e422769
PP
1075 int i = 0, j = 0;
1076
6fca0082 1077 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1078 elt = eltbuf;
1e422769
PP
1079 do { /* DCL$PATH may be a search list */
1080 while (1) { /* as may dev portion of any element */
1081 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1082 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1083 cando_by_name(S_IWUSR,0,elt) ) {
1084 MgTAINTEDDIR_on(mg);
1085 return 0;
1086 }
1087 }
bd61b366 1088 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1089 *cp = '\0';
1090 if (my_trnlnm(elt, eltbuf, j++))
1091 elt = eltbuf;
1092 else
1093 break;
1094 }
1095 j = 0;
1096 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1097 }
1098#endif /* VMS */
5aabfad6 1099 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1100 const char * const strend = s + len;
463ee0b2
LW
1101
1102 while (s < strend) {
96827780 1103 char tmpbuf[256];
c623ac67 1104 Stat_t st;
5f74f29c 1105 I32 i;
f5a63d97
AL
1106#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1107 const char path_sep = '|';
1108#else
1109 const char path_sep = ':';
1110#endif
96827780 1111 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1112 s, strend, path_sep, &i);
463ee0b2 1113 s++;
bb7a0f54 1114 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1115#ifdef VMS
1116 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1117#else
1118 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1119#endif
c6ed36e1 1120 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1121 MgTAINTEDDIR_on(mg);
1e422769
PP
1122 return 0;
1123 }
463ee0b2 1124 }
79072805
LW
1125 }
1126 }
39e571d4 1127#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1128
79072805
LW
1129 return 0;
1130}
1131
1132int
864dbfa3 1133Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1134{
8772537c 1135 PERL_UNUSED_ARG(sv);
bd61b366 1136 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1137 return 0;
1138}
1139
88e89b8a 1140int
864dbfa3 1141Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1142{
97aff369 1143 dVAR;
65e66c80 1144 PERL_UNUSED_ARG(mg);
b0269e46 1145#if defined(VMS)
cea2e8a9 1146 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1147#else
3280af22 1148 if (PL_localizing) {
fb73857a 1149 HE* entry;
b0269e46 1150 my_clearenv();
fb73857a 1151 hv_iterinit((HV*)sv);
155aba94 1152 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1153 I32 keylen;
1154 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1155 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1156 }
1157 }
1158#endif
1159 return 0;
1160}
1161
1162int
864dbfa3 1163Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1164{
27da23d5 1165 dVAR;
8772537c
AL
1166 PERL_UNUSED_ARG(sv);
1167 PERL_UNUSED_ARG(mg);
b0269e46
AB
1168#if defined(VMS)
1169 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1170#else
1171 my_clearenv();
1172#endif
3e3baf6d 1173 return 0;
66b1d557
HM
1174}
1175
64ca3a65 1176#ifndef PERL_MICRO
2d4fcd5e
AJ
1177#ifdef HAS_SIGPROCMASK
1178static void
1179restore_sigmask(pTHX_ SV *save_sv)
1180{
0bd48802 1181 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1182 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1183}
1184#endif
66b1d557 1185int
864dbfa3 1186Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1187{
97aff369 1188 dVAR;
88e89b8a 1189 /* Are we fetching a signal entry? */
8772537c 1190 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1191 if (i > 0) {
22c35a8c
GS
1192 if(PL_psig_ptr[i])
1193 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1194 else {
46da273f 1195 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1196#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1197 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1198 sigstate = SIG_IGN;
2e34cc90
CL
1199#endif
1200#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1201 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1202 sigstate = SIG_DFL;
85b332e2 1203#endif
88e89b8a 1204 /* cache state so we don't fetch it again */
8aad04aa 1205 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1206 sv_setpvs(sv,"IGNORE");
88e89b8a 1207 else
3280af22 1208 sv_setsv(sv,&PL_sv_undef);
46da273f 1209 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1210 SvTEMP_off(sv);
1211 }
1212 }
1213 return 0;
1214}
1215int
864dbfa3 1216Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1217{
2d4fcd5e
AJ
1218 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1219 * refactoring might be in order.
1220 */
27da23d5 1221 dVAR;
8772537c
AL
1222 register const char * const s = MgPV_nolen_const(mg);
1223 PERL_UNUSED_ARG(sv);
2d4fcd5e 1224 if (*s == '_') {
cbbf8932 1225 SV** svp = NULL;
2d4fcd5e
AJ
1226 if (strEQ(s,"__DIE__"))
1227 svp = &PL_diehook;
b274dc4e 1228 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
2d4fcd5e 1229 svp = &PL_warnhook;
27da23d5 1230 if (svp && *svp) {
b274dc4e 1231 SV *const to_dec = *svp;
cbbf8932 1232 *svp = NULL;
b274dc4e 1233 SvREFCNT_dec(to_dec);
2d4fcd5e
AJ
1234 }
1235 }
1236 else {
2d4fcd5e 1237 /* Are we clearing a signal entry? */
8772537c 1238 const I32 i = whichsig(s);
e02bfb16 1239 if (i > 0) {
2d4fcd5e
AJ
1240#ifdef HAS_SIGPROCMASK
1241 sigset_t set, save;
1242 SV* save_sv;
1243 /* Avoid having the signal arrive at a bad time, if possible. */
1244 sigemptyset(&set);
1245 sigaddset(&set,i);
1246 sigprocmask(SIG_BLOCK, &set, &save);
1247 ENTER;
1248 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1249 SAVEFREESV(save_sv);
1250 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1251#endif
1252 PERL_ASYNC_CHECK();
1253#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1254 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1255#endif
1256#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1257 PL_sig_defaulting[i] = 1;
5c1546dc 1258 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1259#else
8aad04aa 1260 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1261#endif
1262 if(PL_psig_name[i]) {
1263 SvREFCNT_dec(PL_psig_name[i]);
1264 PL_psig_name[i]=0;
1265 }
1266 if(PL_psig_ptr[i]) {
6136c704 1267 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1268 PL_psig_ptr[i]=0;
1269 LEAVE;
1270 SvREFCNT_dec(to_dec);
1271 }
1272 else
1273 LEAVE;
1274 }
88e89b8a
PP
1275 }
1276 return 0;
1277}
3d37d572 1278
acd15b85
CB
1279/*
1280 * The signal handling nomenclature has gotten a bit confusing since the advent of
1281 * safe signals. S_raise_signal only raises signals by analogy with what the
1282 * underlying system's signal mechanism does. It might be more proper to say that
1283 * it defers signals that have already been raised and caught.
1284 *
1285 * PL_sig_pending and PL_psig_pend likewise do not track signals that are pending
1286 * in the sense of being on the system's signal queue in between raising and delivery.
1287 * They are only pending on Perl's deferral list, i.e., they track deferred signals
1288 * awaiting delivery after the current Perl opcode completes and say nothing about
1289 * signals raised but not yet caught in the underlying signal implementation.
1290 */
1291
2563cec5
IZ
1292#ifndef SIG_PENDING_DIE_COUNT
1293# define SIG_PENDING_DIE_COUNT 120
1294#endif
1295
dd374669
AL
1296static void
1297S_raise_signal(pTHX_ int sig)
0a8e0eff 1298{
97aff369 1299 dVAR;
0a8e0eff
NIS
1300 /* Set a flag to say this signal is pending */
1301 PL_psig_pend[sig]++;
1302 /* And one to say _a_ signal is pending */
2563cec5
IZ
1303 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1304 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1305 (unsigned long)SIG_PENDING_DIE_COUNT);
0a8e0eff
NIS
1306}
1307
1308Signal_t
8aad04aa
JH
1309#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1310Perl_csighandler(int sig, ...)
1311#else
0a8e0eff 1312Perl_csighandler(int sig)
8aad04aa 1313#endif
0a8e0eff 1314{
1018e26f
NIS
1315#ifdef PERL_GET_SIG_CONTEXT
1316 dTHXa(PERL_GET_SIG_CONTEXT);
1317#else
85b332e2
CL
1318 dTHX;
1319#endif
23ada85b 1320#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1321 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1322 if (PL_sig_ignoring[sig]) return;
85b332e2 1323#endif
2e34cc90 1324#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1325 if (PL_sig_defaulting[sig])
2e34cc90
CL
1326#ifdef KILL_BY_SIGPRC
1327 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1328#else
1329 exit(1);
1330#endif
1331#endif
853d2c32
RGS
1332 if (
1333#ifdef SIGILL
1334 sig == SIGILL ||
1335#endif
1336#ifdef SIGBUS
1337 sig == SIGBUS ||
1338#endif
1339#ifdef SIGSEGV
1340 sig == SIGSEGV ||
1341#endif
1342 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3
JH
1343 /* Call the perl level handler now--
1344 * with risk we may be in malloc() etc. */
1345 (*PL_sighandlerp)(sig);
1346 else
dd374669 1347 S_raise_signal(aTHX_ sig);
0a8e0eff
NIS
1348}
1349
2e34cc90
CL
1350#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1351void
1352Perl_csighandler_init(void)
1353{
1354 int sig;
27da23d5 1355 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1356
1357 for (sig = 1; sig < SIG_SIZE; sig++) {
1358#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1359 dTHX;
27da23d5 1360 PL_sig_defaulting[sig] = 1;
5c1546dc 1361 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1362#endif
1363#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1364 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1365#endif
1366 }
27da23d5 1367 PL_sig_handlers_initted = 1;
2e34cc90
CL
1368}
1369#endif
1370
0a8e0eff
NIS
1371void
1372Perl_despatch_signals(pTHX)
1373{
97aff369 1374 dVAR;
0a8e0eff
NIS
1375 int sig;
1376 PL_sig_pending = 0;
1377 for (sig = 1; sig < SIG_SIZE; sig++) {
1378 if (PL_psig_pend[sig]) {
25da4428
JH
1379 PERL_BLOCKSIG_ADD(set, sig);
1380 PL_psig_pend[sig] = 0;
1381 PERL_BLOCKSIG_BLOCK(set);
f5203343 1382 (*PL_sighandlerp)(sig);
25da4428 1383 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1384 }
1385 }
1386}
1387
85e6fe83 1388int
864dbfa3 1389Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1390{
27da23d5 1391 dVAR;
79072805 1392 I32 i;
cbbf8932 1393 SV** svp = NULL;
2d4fcd5e
AJ
1394 /* Need to be careful with SvREFCNT_dec(), because that can have side
1395 * effects (due to closures). We must make sure that the new disposition
1396 * is in place before it is called.
1397 */
cbbf8932 1398 SV* to_dec = NULL;
e72dc28c 1399 STRLEN len;
2d4fcd5e
AJ
1400#ifdef HAS_SIGPROCMASK
1401 sigset_t set, save;
1402 SV* save_sv;
1403#endif
a0d0e21e 1404
d5263905 1405 register const char *s = MgPV_const(mg,len);
748a9306
LW
1406 if (*s == '_') {
1407 if (strEQ(s,"__DIE__"))
3280af22 1408 svp = &PL_diehook;
748a9306 1409 else if (strEQ(s,"__WARN__"))
3280af22 1410 svp = &PL_warnhook;
748a9306 1411 else
cea2e8a9 1412 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1413 i = 0;
4633a7c4 1414 if (*svp) {
9289f461
RGS
1415 if (*svp != PERL_WARNHOOK_FATAL)
1416 to_dec = *svp;
cbbf8932 1417 *svp = NULL;
4633a7c4 1418 }
748a9306
LW
1419 }
1420 else {
1421 i = whichsig(s); /* ...no, a brick */
86d86cad 1422 if (i <= 0) {
e476b1b5 1423 if (ckWARN(WARN_SIGNAL))
9014280d 1424 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1425 return 0;
1426 }
2d4fcd5e
AJ
1427#ifdef HAS_SIGPROCMASK
1428 /* Avoid having the signal arrive at a bad time, if possible. */
1429 sigemptyset(&set);
1430 sigaddset(&set,i);
1431 sigprocmask(SIG_BLOCK, &set, &save);
1432 ENTER;
1433 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1434 SAVEFREESV(save_sv);
1435 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1436#endif
1437 PERL_ASYNC_CHECK();
2e34cc90 1438#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1439 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1440#endif
23ada85b 1441#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1442 PL_sig_ignoring[i] = 0;
85b332e2 1443#endif
2e34cc90 1444#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1445 PL_sig_defaulting[i] = 0;
2e34cc90 1446#endif
22c35a8c 1447 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1448 to_dec = PL_psig_ptr[i];
46da273f 1449 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1450 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1451 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1452 SvREADONLY_on(PL_psig_name[i]);
748a9306 1453 }
a0d0e21e 1454 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1455 if (i) {
5c1546dc 1456 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1457#ifdef HAS_SIGPROCMASK
1458 LEAVE;
1459#endif
1460 }
748a9306 1461 else
b37c2d43 1462 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1463 if(to_dec)
1464 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1465 return 0;
1466 }
baf38871 1467 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
748a9306 1468 if (strEQ(s,"IGNORE")) {
85b332e2 1469 if (i) {
23ada85b 1470#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1471 PL_sig_ignoring[i] = 1;
5c1546dc 1472 (void)rsignal(i, PL_csighandlerp);
85b332e2 1473#else
8aad04aa 1474 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1475#endif
2d4fcd5e 1476 }
748a9306
LW
1477 }
1478 else if (strEQ(s,"DEFAULT") || !*s) {
1479 if (i)
2e34cc90
CL
1480#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1481 {
27da23d5 1482 PL_sig_defaulting[i] = 1;
5c1546dc 1483 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1484 }
1485#else
8aad04aa 1486 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1487#endif
748a9306 1488 }
79072805 1489 else {
5aabfad6
PP
1490 /*
1491 * We should warn if HINT_STRICT_REFS, but without
1492 * access to a known hint bit in a known OP, we can't
1493 * tell whether HINT_STRICT_REFS is in force or not.
1494 */
46fc3d4c 1495 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1496 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1497 if (i)
5c1546dc 1498 (void)rsignal(i, PL_csighandlerp);
748a9306 1499 else
46da273f 1500 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1501 }
2d4fcd5e
AJ
1502#ifdef HAS_SIGPROCMASK
1503 if(i)
1504 LEAVE;
1505#endif
1506 if(to_dec)
1507 SvREFCNT_dec(to_dec);
79072805
LW
1508 return 0;
1509}
64ca3a65 1510#endif /* !PERL_MICRO */
79072805
LW
1511
1512int
864dbfa3 1513Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1514{
97aff369 1515 dVAR;
08aeb9f7 1516 HV* stash;
8772537c 1517 PERL_UNUSED_ARG(sv);
e1a479c5 1518
08aeb9f7
BB
1519 /* Bail out if destruction is going on */
1520 if(PL_dirty) return 0;
1521
70cd14a1
CB
1522 /* XXX Once it's possible, we need to
1523 detect that our @ISA is aliased in
1524 other stashes, and act on the stashes
1525 of all of the aliases */
1526
e1a479c5
BB
1527 /* The first case occurs via setisa,
1528 the second via setisa_elem, which
1529 calls this same magic */
08aeb9f7
BB
1530 stash = GvSTASH(
1531 SvTYPE(mg->mg_obj) == SVt_PVGV
1532 ? (GV*)mg->mg_obj
1533 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
e1a479c5
BB
1534 );
1535
08aeb9f7
BB
1536 if(PL_delaymagic)
1537 PL_delayedisa = stash;
1538 else
1539 mro_isa_changed_in(stash);
1540
463ee0b2
LW
1541 return 0;
1542}
1543
5be5c7a6
BB
1544int Perl_magic_freeisa(pTHX_ SV *sv, MAGIC *mg)
1545{
1546 dVAR;
1547 GV** gvp;
1548 GV* gv;
1549 AV* isa;
1550
1551 PERL_UNUSED_ARG(sv);
1552
1553 if(PL_dirty) return 0;
1554
1555 gvp = (GV**)hv_fetchs(GvSTASH((GV*)mg->mg_obj), "ISA", FALSE);
1556 gv = gvp ? *gvp : NULL;
1557 isa = (gv && isGV_with_GP(gv)) ? GvAV(gv) : NULL;
1558
1559 if(isa) av_undef(isa);
1560
1561 return 0;
1562}
1563
463ee0b2 1564int
864dbfa3 1565Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1566{
97aff369 1567 dVAR;
8772537c
AL
1568 PERL_UNUSED_ARG(sv);
1569 PERL_UNUSED_ARG(mg);
3280af22 1570 PL_amagic_generation++;
463ee0b2 1571
a0d0e21e
LW
1572 return 0;
1573}
463ee0b2 1574
946ec16e 1575int
864dbfa3 1576Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1577{
dd374669 1578 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1579 I32 i = 0;
8772537c 1580 PERL_UNUSED_ARG(mg);
7719e241 1581
6ff81951 1582 if (hv) {
497b47a8
JH
1583 (void) hv_iterinit(hv);
1584 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1585 i = HvKEYS(hv);
1586 else {
1587 while (hv_iternext(hv))
1588 i++;
1589 }
6ff81951
GS
1590 }
1591
1592 sv_setiv(sv, (IV)i);
1593 return 0;
1594}
1595
1596int
864dbfa3 1597Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1598{
8772537c 1599 PERL_UNUSED_ARG(mg);
946ec16e
PP
1600 if (LvTARG(sv)) {
1601 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1602 }
1603 return 0;
ac27b0f5 1604}
946ec16e 1605
e336de0d 1606/* caller is responsible for stack switching/cleanup */
565764a8 1607STATIC int
e1ec3a88 1608S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1609{
97aff369 1610 dVAR;
a0d0e21e 1611 dSP;
463ee0b2 1612
924508f0
GS
1613 PUSHMARK(SP);
1614 EXTEND(SP, n);
33c27489 1615 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1616 if (n > 1) {
93965878 1617 if (mg->mg_ptr) {
565764a8 1618 if (mg->mg_len >= 0)
79cb57f6 1619 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1620 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1621 PUSHs((SV*)mg->mg_ptr);
1622 }
14befaf4 1623 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1624 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1625 }
1626 }
1627 if (n > 2) {
1628 PUSHs(val);
88e89b8a 1629 }
463ee0b2
LW
1630 PUTBACK;
1631
864dbfa3 1632 return call_method(meth, flags);
946ec16e
PP
1633}
1634
76e3520e 1635STATIC int
e1ec3a88 1636S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1637{
27da23d5 1638 dVAR; dSP;
463ee0b2 1639
a0d0e21e
LW
1640 ENTER;
1641 SAVETMPS;
e788e7d3 1642 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1643
33c27489 1644 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1645 sv_setsv(sv, *PL_stack_sp--);
93965878 1646 }
463ee0b2 1647
d3acc0f7 1648 POPSTACK;
a0d0e21e
LW
1649 FREETMPS;
1650 LEAVE;
1651 return 0;
1652}
463ee0b2 1653
a0d0e21e 1654int
864dbfa3 1655Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1656{
a0d0e21e
LW
1657 if (mg->mg_ptr)
1658 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1659 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1660 return 0;
1661}
1662
1663int
864dbfa3 1664Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1665{
27da23d5 1666 dVAR; dSP;
a60c0954 1667 ENTER;
e788e7d3 1668 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1669 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1670 POPSTACK;
a60c0954 1671 LEAVE;
463ee0b2
LW
1672 return 0;
1673}
1674
1675int
864dbfa3 1676Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1677{
a0d0e21e
LW
1678 return magic_methpack(sv,mg,"DELETE");
1679}
463ee0b2 1680
93965878
NIS
1681
1682U32
864dbfa3 1683Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1684{
27da23d5 1685 dVAR; dSP;
22846ab4 1686 I32 retval = 0;
93965878
NIS
1687
1688 ENTER;
1689 SAVETMPS;
e788e7d3 1690 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1691 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1692 sv = *PL_stack_sp--;
22846ab4
AB
1693 retval = SvIV(sv)-1;
1694 if (retval < -1)
1695 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1696 }
d3acc0f7 1697 POPSTACK;
93965878
NIS
1698 FREETMPS;
1699 LEAVE;
22846ab4 1700 return (U32) retval;
93965878
NIS
1701}
1702
cea2e8a9
GS
1703int
1704Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1705{
27da23d5 1706 dVAR; dSP;
463ee0b2 1707
e336de0d 1708 ENTER;
e788e7d3 1709 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1710 PUSHMARK(SP);
33c27489 1711 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1712 PUTBACK;
864dbfa3 1713 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1714 POPSTACK;
a60c0954 1715 LEAVE;
a3bcc51e 1716
463ee0b2
LW
1717 return 0;
1718}
1719
1720int
864dbfa3 1721Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1722{
27da23d5 1723 dVAR; dSP;
666ea192 1724 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1725
1726 ENTER;
a0d0e21e 1727 SAVETMPS;
e788e7d3 1728 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1729 PUSHMARK(SP);
1730 EXTEND(SP, 2);
33c27489 1731 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1732 if (SvOK(key))
1733 PUSHs(key);
1734 PUTBACK;
1735
864dbfa3 1736 if (call_method(meth, G_SCALAR))
3280af22 1737 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1738
d3acc0f7 1739 POPSTACK;
a0d0e21e
LW
1740 FREETMPS;
1741 LEAVE;
79072805
LW
1742 return 0;
1743}
1744
1745int
1146e912 1746Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1747{
1748 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1749}
a0d0e21e 1750
a3bcc51e
TP
1751SV *
1752Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1753{
27da23d5 1754 dVAR; dSP;
5fcbf73d 1755 SV *retval;
8772537c
AL
1756 SV * const tied = SvTIED_obj((SV*)hv, mg);
1757 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1758
1759 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1760 SV *key;
bfcb3514 1761 if (HvEITER_get(hv))
a3bcc51e
TP
1762 /* we are in an iteration so the hash cannot be empty */
1763 return &PL_sv_yes;
1764 /* no xhv_eiter so now use FIRSTKEY */
1765 key = sv_newmortal();
1766 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1767 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1768 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1769 }
1770
1771 /* there is a SCALAR method that we can call */
1772 ENTER;
1773 PUSHSTACKi(PERLSI_MAGIC);
1774 PUSHMARK(SP);
1775 EXTEND(SP, 1);
1776 PUSHs(tied);
1777 PUTBACK;
1778
1779 if (call_method("SCALAR", G_SCALAR))
1780 retval = *PL_stack_sp--;
5fcbf73d
AL
1781 else
1782 retval = &PL_sv_undef;
a3bcc51e
TP
1783 POPSTACK;
1784 LEAVE;
1785 return retval;
1786}
1787
a0d0e21e 1788int
864dbfa3 1789Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1790{
97aff369 1791 dVAR;
8772537c
AL
1792 GV * const gv = PL_DBline;
1793 const I32 i = SvTRUE(sv);
1794 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1795 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1796 if (svp && SvIOKp(*svp)) {
1797 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1798 if (o) {
1799 /* set or clear breakpoint in the relevant control op */
1800 if (i)
1801 o->op_flags |= OPf_SPECIAL;
1802 else
1803 o->op_flags &= ~OPf_SPECIAL;
1804 }
5df8de69 1805 }
79072805
LW
1806 return 0;
1807}
1808
1809int
8772537c 1810Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1811{
97aff369 1812 dVAR;
8772537c 1813 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1814 if (obj) {
fc15ae8f 1815 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1816 } else {
1817 SvOK_off(sv);
1818 }
79072805
LW
1819 return 0;
1820}
1821
1822int
864dbfa3 1823Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1824{
97aff369 1825 dVAR;
8772537c 1826 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1827 if (obj) {
fc15ae8f 1828 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1829 } else {
1830 if (ckWARN(WARN_MISC))
1831 Perl_warner(aTHX_ packWARN(WARN_MISC),
1832 "Attempt to set length of freed array");
1833 }
1834 return 0;
1835}
1836
1837int
1838Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1839{
97aff369 1840 dVAR;
53c1dcc0 1841 PERL_UNUSED_ARG(sv);
94f3782b
DM
1842 /* during global destruction, mg_obj may already have been freed */
1843 if (PL_in_clean_all)
1ea47f64 1844 return 0;
94f3782b 1845
83bf042f
NC
1846 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1847
1848 if (mg) {
1849 /* arylen scalar holds a pointer back to the array, but doesn't own a
1850 reference. Hence the we (the array) are about to go away with it
1851 still pointing at us. Clear its pointer, else it would be pointing
1852 at free memory. See the comment in sv_magic about reference loops,
1853 and why it can't own a reference to us. */
1854 mg->mg_obj = 0;
1855 }
a0d0e21e
LW
1856 return 0;
1857}
1858
1859int
864dbfa3 1860Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1861{
97aff369 1862 dVAR;
8772537c 1863 SV* const lsv = LvTARG(sv);
3881461a 1864 PERL_UNUSED_ARG(mg);
ac27b0f5 1865
a0d0e21e 1866 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1867 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1868 if (found && found->mg_len >= 0) {
1869 I32 i = found->mg_len;
7e2040f0 1870 if (DO_UTF8(lsv))
a0ed51b3 1871 sv_pos_b2u(lsv, &i);
fc15ae8f 1872 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1873 return 0;
1874 }
1875 }
0c34ef67 1876 SvOK_off(sv);
a0d0e21e
LW
1877 return 0;
1878}
1879
1880int
864dbfa3 1881Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1882{
97aff369 1883 dVAR;
8772537c 1884 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1885 SSize_t pos;
1886 STRLEN len;
c00206c8 1887 STRLEN ulen = 0;
53d44271 1888 MAGIC* found;
a0d0e21e 1889
3881461a 1890 PERL_UNUSED_ARG(mg);
ac27b0f5 1891
a0d0e21e 1892 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1893 found = mg_find(lsv, PERL_MAGIC_regex_global);
1894 else
1895 found = NULL;
1896 if (!found) {
a0d0e21e
LW
1897 if (!SvOK(sv))
1898 return 0;
d83f0a82
NC
1899#ifdef PERL_OLD_COPY_ON_WRITE
1900 if (SvIsCOW(lsv))
1901 sv_force_normal_flags(lsv, 0);
1902#endif
3881461a 1903 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1904 NULL, 0);
a0d0e21e
LW
1905 }
1906 else if (!SvOK(sv)) {
3881461a 1907 found->mg_len = -1;
a0d0e21e
LW
1908 return 0;
1909 }
1910 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1911
fc15ae8f 1912 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1913
7e2040f0 1914 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1915 ulen = sv_len_utf8(lsv);
1916 if (ulen)
1917 len = ulen;
a0ed51b3
LW
1918 }
1919
a0d0e21e
LW
1920 if (pos < 0) {
1921 pos += len;
1922 if (pos < 0)
1923 pos = 0;
1924 }
eb160463 1925 else if (pos > (SSize_t)len)
a0d0e21e 1926 pos = len;
a0ed51b3
LW
1927
1928 if (ulen) {
1929 I32 p = pos;
1930 sv_pos_u2b(lsv, &p, 0);
1931 pos = p;
1932 }
727405f8 1933
3881461a
AL
1934 found->mg_len = pos;
1935 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1936
79072805
LW
1937 return 0;
1938}
1939
1940int
864dbfa3 1941Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1942{
79072805 1943 GV* gv;
8772537c
AL
1944 PERL_UNUSED_ARG(mg);
1945
dd69841b
BB
1946 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1947
79072805
LW
1948 if (!SvOK(sv))
1949 return 0;
2e5b91de 1950 if (isGV_with_GP(sv)) {
180488f8
NC
1951 /* We're actually already a typeglob, so don't need the stuff below.
1952 */
1953 return 0;
1954 }
f776e3cd 1955 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1956 if (sv == (SV*)gv)
1957 return 0;
1958 if (GvGP(sv))
88e89b8a 1959 gp_free((GV*)sv);
79072805 1960 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1961 return 0;
1962}
1963
1964int
864dbfa3 1965Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1966{
1967 STRLEN len;
35a4481c 1968 SV * const lsv = LvTARG(sv);
b83604b4 1969 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1970 I32 offs = LvTARGOFF(sv);
1971 I32 rem = LvTARGLEN(sv);
8772537c 1972 PERL_UNUSED_ARG(mg);
6ff81951 1973
9aa983d2
JH
1974 if (SvUTF8(lsv))
1975 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1976 if (offs > (I32)len)
6ff81951 1977 offs = len;
eb160463 1978 if (rem + offs > (I32)len)
6ff81951
GS
1979 rem = len - offs;
1980 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1981 if (SvUTF8(lsv))
2ef4b674 1982 SvUTF8_on(sv);
6ff81951
GS
1983 return 0;
1984}
1985
1986int
864dbfa3 1987Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1988{
97aff369 1989 dVAR;
9aa983d2 1990 STRLEN len;
5fcbf73d 1991 const char * const tmps = SvPV_const(sv, len);
dd374669 1992 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1993 I32 lvoff = LvTARGOFF(sv);
1994 I32 lvlen = LvTARGLEN(sv);
8772537c 1995 PERL_UNUSED_ARG(mg);
075a4a2b 1996
1aa99e6b 1997 if (DO_UTF8(sv)) {
9aa983d2
JH
1998 sv_utf8_upgrade(lsv);
1999 sv_pos_u2b(lsv, &lvoff, &lvlen);
2000 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 2001 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
2002 SvUTF8_on(lsv);
2003 }
9bf12eaf 2004 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2005 const char *utf8;
9aa983d2 2006 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 2007 LvTARGLEN(sv) = len;
5fcbf73d
AL
2008 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2009 sv_insert(lsv, lvoff, lvlen, utf8, len);
2010 Safefree(utf8);
1aa99e6b 2011 }
b76f3ce2
GB
2012 else {
2013 sv_insert(lsv, lvoff, lvlen, tmps, len);
2014 LvTARGLEN(sv) = len;
2015 }
2016
1aa99e6b 2017
79072805
LW
2018 return 0;
2019}
2020
2021int
864dbfa3 2022Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2023{
97aff369 2024 dVAR;
8772537c 2025 PERL_UNUSED_ARG(sv);
27cc343c 2026 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2027 return 0;
2028}
2029
2030int
864dbfa3 2031Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2032{
97aff369 2033 dVAR;
8772537c 2034 PERL_UNUSED_ARG(sv);
b01e650a
DM
2035 /* update taint status */
2036 if (PL_tainted)
2037 mg->mg_len |= 1;
2038 else
2039 mg->mg_len &= ~1;
463ee0b2
LW
2040 return 0;
2041}
2042
2043int
864dbfa3 2044Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2045{
35a4481c 2046 SV * const lsv = LvTARG(sv);
8772537c 2047 PERL_UNUSED_ARG(mg);
6ff81951 2048
6136c704
AL
2049 if (lsv)
2050 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2051 else
0c34ef67 2052 SvOK_off(sv);
6ff81951 2053
6ff81951
GS
2054 return 0;
2055}
2056
2057int
864dbfa3 2058Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2059{
8772537c 2060 PERL_UNUSED_ARG(mg);
79072805
LW
2061 do_vecset(sv); /* XXX slurp this routine */
2062 return 0;
2063}
2064
2065int
864dbfa3 2066Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2067{
97aff369 2068 dVAR;
a0714e2c 2069 SV *targ = NULL;
5f05dabc 2070 if (LvTARGLEN(sv)) {
68dc0745 2071 if (mg->mg_obj) {
8772537c
AL
2072 SV * const ahv = LvTARG(sv);
2073 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2074 if (he)
2075 targ = HeVAL(he);
68dc0745
PP
2076 }
2077 else {
8772537c 2078 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2079 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2080 targ = AvARRAY(av)[LvTARGOFF(sv)];
2081 }
46da273f 2082 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2083 /* somebody else defined it for us */
2084 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2085 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2086 LvTARGLEN(sv) = 0;
2087 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2088 mg->mg_obj = NULL;
68dc0745
PP
2089 mg->mg_flags &= ~MGf_REFCOUNTED;
2090 }
5f05dabc 2091 }
71be2cbc
PP
2092 else
2093 targ = LvTARG(sv);
3280af22 2094 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2095 return 0;
2096}
2097
2098int
864dbfa3 2099Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2100{
8772537c 2101 PERL_UNUSED_ARG(mg);
71be2cbc 2102 if (LvTARGLEN(sv))
68dc0745
PP
2103 vivify_defelem(sv);
2104 if (LvTARG(sv)) {
5f05dabc 2105 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2106 SvSETMAGIC(LvTARG(sv));
2107 }
5f05dabc
PP
2108 return 0;
2109}
2110
71be2cbc 2111void
864dbfa3 2112Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2113{
97aff369 2114 dVAR;
74e13ce4 2115 MAGIC *mg;
a0714e2c 2116 SV *value = NULL;
71be2cbc 2117
14befaf4 2118 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2119 return;
68dc0745 2120 if (mg->mg_obj) {
8772537c
AL
2121 SV * const ahv = LvTARG(sv);
2122 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2123 if (he)
2124 value = HeVAL(he);
3280af22 2125 if (!value || value == &PL_sv_undef)
be2597df 2126 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2127 }
68dc0745 2128 else {
8772537c 2129 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2130 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2131 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2132 else {
d4c19fe8 2133 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2134 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2135 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2136 }
2137 }
b37c2d43 2138 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2139 SvREFCNT_dec(LvTARG(sv));
2140 LvTARG(sv) = value;
71be2cbc 2141 LvTARGLEN(sv) = 0;
68dc0745 2142 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2143 mg->mg_obj = NULL;
68dc0745 2144 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2145}
2146
2147int
864dbfa3 2148Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2149{
86f55936 2150 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2151}
2152
2153int
864dbfa3 2154Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2155{
96a5add6 2156 PERL_UNUSED_CONTEXT;
565764a8 2157 mg->mg_len = -1;
c6496cc7 2158 SvSCREAM_off(sv);
93a17b20
LW
2159 return 0;
2160}
2161
2162int
864dbfa3 2163Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2164{
8772537c 2165 PERL_UNUSED_ARG(mg);
14befaf4 2166 sv_unmagic(sv, PERL_MAGIC_bm);
b84d1fce 2167 SvTAIL_off(sv);
79072805
LW
2168 SvVALID_off(sv);
2169 return 0;
2170}
2171
2172int
864dbfa3 2173Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2174{
8772537c 2175 PERL_UNUSED_ARG(mg);
14befaf4 2176 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2177 SvCOMPILED_off(sv);
2178 return 0;
2179}
2180
2181int
864dbfa3 2182Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2183{
35a4481c 2184 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2185
2186 if (uf && uf->uf_set)
24f81a43 2187 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2188 return 0;
2189}
2190
c277df42 2191int
faf82a0b
AE
2192Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2193{
8772537c 2194 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2195 sv_unmagic(sv, PERL_MAGIC_qr);
2196 return 0;
2197}
2198
2199int
864dbfa3 2200Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2201{
97aff369 2202 dVAR;
8772537c
AL
2203 regexp * const re = (regexp *)mg->mg_obj;
2204 PERL_UNUSED_ARG(sv);
2205
c277df42
IZ
2206 ReREFCNT_dec(re);
2207 return 0;
2208}
2209
7a4c00b4 2210#ifdef USE_LOCALE_COLLATE
79072805 2211int
864dbfa3 2212Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2213{
2214 /*
838b5b74 2215 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2216 * and vanished with a faint plop.
2217 */
96a5add6 2218 PERL_UNUSED_CONTEXT;
8772537c 2219 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2220 if (mg->mg_ptr) {
2221 Safefree(mg->mg_ptr);
2222 mg->mg_ptr = NULL;
565764a8 2223 mg->mg_len = -1;
7a4c00b4 2224 }
bbce6d69
PP
2225 return 0;
2226}
7a4c00b4 2227#endif /* USE_LOCALE_COLLATE */
bbce6d69 2228
7e8c5dac
HS
2229/* Just clear the UTF-8 cache data. */
2230int
2231Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2232{
96a5add6 2233 PERL_UNUSED_CONTEXT;
8772537c 2234 PERL_UNUSED_ARG(sv);
7e8c5dac 2235 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2236 mg->mg_ptr = NULL;
7e8c5dac
HS
2237 mg->mg_len = -1; /* The mg_len holds the len cache. */
2238 return 0;
2239}
2240
bbce6d69 2241int
864dbfa3 2242Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2243{
97aff369 2244 dVAR;
e1ec3a88 2245 register const char *s;
2fdbfb4d
AB
2246 register I32 paren;
2247 register const REGEXP * rx;
2248 const char * const remaining = mg->mg_ptr + 1;
79072805 2249 I32 i;
8990e307 2250 STRLEN len;
2fdbfb4d 2251
79072805 2252 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2253 case '\015': /* $^MATCH */
2254 if (strEQ(remaining, "ATCH"))
2255 goto do_match;
2256 case '`': /* ${^PREMATCH} caught below */
2257 do_prematch:
192b9cd1 2258 paren = RXf_PREMATCH;
2fdbfb4d
AB
2259 goto setparen;
2260 case '\'': /* ${^POSTMATCH} caught below */
2261 do_postmatch:
192b9cd1 2262 paren = RXf_POSTMATCH;
2fdbfb4d
AB
2263 goto setparen;
2264 case '&':
2265 do_match:
192b9cd1 2266 paren = RXf_MATCH;
2fdbfb4d
AB
2267 goto setparen;
2268 case '1': case '2': case '3': case '4':
2269 case '5': case '6': case '7': case '8': case '9':
104a8018 2270 paren = atoi(mg->mg_ptr);
2fdbfb4d 2271 setparen:
1e05feb3 2272 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
2273 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2274 break;
1e05feb3 2275 } else {
2fdbfb4d
AB
2276 /* Croak with a READONLY error when a numbered match var is
2277 * set without a previous pattern match. Unless it's C<local $1>
2278 */
2279 if (!PL_localizing) {
2280 Perl_croak(aTHX_ PL_no_modify);
2281 }
2282 }
748a9306 2283 case '\001': /* ^A */
3280af22 2284 sv_setsv(PL_bodytarget, sv);
748a9306 2285 break;
49460fe6 2286 case '\003': /* ^C */
38ab35f8 2287 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2288 break;
2289
79072805 2290 case '\004': /* ^D */
b4ab917c 2291#ifdef DEBUGGING
b83604b4 2292 s = SvPV_nolen_const(sv);
ddcf8bc1 2293 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2294 DEBUG_x(dump_all());
b4ab917c 2295#else
38ab35f8 2296 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2297#endif
79072805 2298 break;
28f23441 2299 case '\005': /* ^E */
d0063567 2300 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2301#ifdef MACOS_TRADITIONAL
38ab35f8 2302 gMacPerl_OSErr = SvIV(sv);
28f23441 2303#else
cd39f2b6 2304# ifdef VMS
38ab35f8 2305 set_vaxc_errno(SvIV(sv));
048c1ddf 2306# else
cd39f2b6 2307# ifdef WIN32
d0063567 2308 SetLastError( SvIV(sv) );
cd39f2b6 2309# else
9fed8b87 2310# ifdef OS2
38ab35f8 2311 os2_setsyserrno(SvIV(sv));
9fed8b87 2312# else
d0063567 2313 /* will anyone ever use this? */
38ab35f8 2314 SETERRNO(SvIV(sv), 4);
cd39f2b6 2315# endif
048c1ddf
IZ
2316# endif
2317# endif
22fae026 2318#endif
d0063567
DK
2319 }
2320 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2321 if (PL_encoding)
2322 SvREFCNT_dec(PL_encoding);
2323 if (SvOK(sv) || SvGMAGICAL(sv)) {
2324 PL_encoding = newSVsv(sv);
2325 }
2326 else {
a0714e2c 2327 PL_encoding = NULL;
d0063567
DK
2328 }
2329 }
2330 break;
79072805 2331 case '\006': /* ^F */
38ab35f8 2332 PL_maxsysfd = SvIV(sv);
79072805 2333 break;
a0d0e21e 2334 case '\010': /* ^H */
38ab35f8 2335 PL_hints = SvIV(sv);
a0d0e21e 2336 break;
9d116dd7 2337 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2338 Safefree(PL_inplace);
bd61b366 2339 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2340 break;
28f23441 2341 case '\017': /* ^O */
ac27b0f5 2342 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2343 Safefree(PL_osname);
bd61b366 2344 PL_osname = NULL;
3511154c
DM
2345 if (SvOK(sv)) {
2346 TAINT_PROPER("assigning to $^O");
2e0de35c 2347 PL_osname = savesvpv(sv);
3511154c 2348 }
ac27b0f5
NIS
2349 }
2350 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2351 STRLEN len;
2352 const char *const start = SvPV(sv, len);
b54fc2b6 2353 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2354 SV *tmp;
2355 struct refcounted_he *tmp_he;
2356
2357
2358 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2359 PL_hints
2360 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2361
2362 /* Opening for input is more common than opening for output, so
2363 ensure that hints for input are sooner on linked list. */
2364 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2365 : newSVpvs(""));
2366 SvFLAGS(tmp) |= SvUTF8(sv);
2367
2368 tmp_he
2369 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2370 sv_2mortal(newSVpvs("open>")), tmp);
2371
2372 /* The UTF-8 setting is carried over */
2373 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2374
11bcd5da 2375 PL_compiling.cop_hints_hash
8b850bd5
NC
2376 = Perl_refcounted_he_new(aTHX_ tmp_he,
2377 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2378 }
28f23441 2379 break;
79072805 2380 case '\020': /* ^P */
2fdbfb4d
AB
2381 if (*remaining == '\0') { /* ^P */
2382 PL_perldb = SvIV(sv);
2383 if (PL_perldb && !PL_DBsingle)
2384 init_debugger();
2385 break;
2386 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2387 goto do_prematch;
2388 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2389 goto do_postmatch;
2390 }
79072805 2391 case '\024': /* ^T */
88e89b8a 2392#ifdef BIG_TIME
6b88bc9c 2393 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2394#else
38ab35f8 2395 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2396#endif
79072805 2397 break;
e07ea26a
NC
2398 case '\025': /* ^UTF8CACHE */
2399 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2400 PL_utf8cache = (signed char) sv_2iv(sv);
2401 }
2402 break;
fde18df1 2403 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2404 if (*(mg->mg_ptr+1) == '\0') {
2405 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2406 i = SvIV(sv);
ac27b0f5 2407 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2408 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2409 }
599cee73 2410 }
0a378802 2411 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2412 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2413 if (!SvPOK(sv) && PL_localizing) {
2414 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2415 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2416 break;
2417 }
f4fc7782 2418 {
b5477537 2419 STRLEN len, i;
d3a7d8c7 2420 int accumulate = 0 ;
f4fc7782 2421 int any_fatals = 0 ;
b83604b4 2422 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2423 for (i = 0 ; i < len ; ++i) {
2424 accumulate |= ptr[i] ;
2425 any_fatals |= (ptr[i] & 0xAA) ;
2426 }
4243c432
NC
2427 if (!accumulate) {
2428 if (!specialWARN(PL_compiling.cop_warnings))
2429 PerlMemShared_free(PL_compiling.cop_warnings);
2430 PL_compiling.cop_warnings = pWARN_NONE;
2431 }
72dc9ed5
NC
2432 /* Yuck. I can't see how to abstract this: */
2433 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2434 WARN_ALL) && !any_fatals) {
4243c432
NC
2435 if (!specialWARN(PL_compiling.cop_warnings))
2436 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2437 PL_compiling.cop_warnings = pWARN_ALL;
2438 PL_dowarn |= G_WARN_ONCE ;
727405f8 2439 }
d3a7d8c7 2440 else {
72dc9ed5
NC
2441 STRLEN len;
2442 const char *const p = SvPV_const(sv, len);
2443
2444 PL_compiling.cop_warnings
8ee4cf24 2445 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2446 p, len);
2447
d3a7d8c7
GS
2448 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2449 PL_dowarn |= G_WARN_ONCE ;
2450 }
f4fc7782 2451
d3a7d8c7 2452 }
4438c4b7 2453 }
971a9dd3 2454 }
79072805
LW
2455 break;
2456 case '.':
3280af22
NIS
2457 if (PL_localizing) {
2458 if (PL_localizing == 1)
7766f137 2459 SAVESPTR(PL_last_in_gv);
748a9306 2460 }
3280af22 2461 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2462 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2463 break;
2464 case '^':
3280af22 2465 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2466 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2467 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2468 break;
2469 case '~':
3280af22 2470 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2471 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2472 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2473 break;
2474 case '=':
38ab35f8 2475 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2476 break;
2477 case '-':
38ab35f8 2478 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2479 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2480 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2481 break;
2482 case '%':
38ab35f8 2483 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2484 break;
2485 case '|':
4b65379b 2486 {
8772537c 2487 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2488 if(!io)
2489 break;
38ab35f8 2490 if ((SvIV(sv)) == 0)
4b65379b
CS
2491 IoFLAGS(io) &= ~IOf_FLUSH;
2492 else {
2493 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2494 PerlIO *ofp = IoOFP(io);
2495 if (ofp)
2496 (void)PerlIO_flush(ofp);
2497 IoFLAGS(io) |= IOf_FLUSH;
2498 }
2499 }
79072805
LW
2500 }
2501 break;
79072805 2502 case '/':
3280af22 2503 SvREFCNT_dec(PL_rs);
8bfdd7d9 2504 PL_rs = newSVsv(sv);
79072805
LW
2505 break;
2506 case '\\':
7889fe52
NIS
2507 if (PL_ors_sv)
2508 SvREFCNT_dec(PL_ors_sv);
009c130f 2509 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2510 PL_ors_sv = newSVsv(sv);
009c130f 2511 }
e3c19b7b 2512 else {
a0714e2c 2513 PL_ors_sv = NULL;
e3c19b7b 2514 }
79072805
LW
2515 break;
2516 case ',':
7889fe52
NIS
2517 if (PL_ofs_sv)
2518 SvREFCNT_dec(PL_ofs_sv);
2519 if (SvOK(sv) || SvGMAGICAL(sv)) {
2520 PL_ofs_sv = newSVsv(sv);
2521 }
2522 else {
a0714e2c 2523 PL_ofs_sv = NULL;
7889fe52 2524 }
79072805 2525 break;
79072805 2526 case '[':
38ab35f8 2527 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2528 break;
2529 case '?':
ff0cee69 2530#ifdef COMPLEX_STATUS
6b88bc9c
GS
2531 if (PL_localizing == 2) {
2532 PL_statusvalue = LvTARGOFF(sv);
2533 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2534 }
2535 else
2536#endif
2537#ifdef VMSISH_STATUS
2538 if (VMSISH_STATUS)
fb38d079 2539 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2540 else
2541#endif
38ab35f8 2542 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2543 break;
2544 case '!':
93189314
JH
2545 {
2546#ifdef VMS
2547# define PERL_VMS_BANG vaxc$errno
2548#else
2549# define PERL_VMS_BANG 0
2550#endif
91487cfc 2551 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2552 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2553 }
79072805
LW
2554 break;
2555 case '<':
38ab35f8 2556 PL_uid = SvIV(sv);
3280af22
NIS
2557 if (PL_delaymagic) {
2558 PL_delaymagic |= DM_RUID;
79072805
LW
2559 break; /* don't do magic till later */
2560 }
2561#ifdef HAS_SETRUID
b28d0864 2562 (void)setruid((Uid_t)PL_uid);
79072805
LW
2563#else
2564#ifdef HAS_SETREUID
3280af22 2565 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2566#else
85e6fe83 2567#ifdef HAS_SETRESUID
b28d0864 2568 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2569#else
75870ed3 2570 if (PL_uid == PL_euid) { /* special case $< = $> */
2571#ifdef PERL_DARWIN
2572 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2573 if (PL_uid != 0 && PerlProc_getuid() == 0)
2574 (void)PerlProc_setuid(0);
2575#endif
b28d0864 2576 (void)PerlProc_setuid(PL_uid);
75870ed3 2577 } else {
d8eceb89 2578 PL_uid = PerlProc_getuid();
cea2e8a9 2579 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2580 }
79072805
LW
2581#endif
2582#endif
85e6fe83 2583#endif
d8eceb89 2584 PL_uid = PerlProc_getuid();
3280af22 2585 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2586 break;
2587 case '>':
38ab35f8 2588 PL_euid = SvIV(sv);
3280af22
NIS
2589 if (PL_delaymagic) {
2590 PL_delaymagic |= DM_EUID;
79072805
LW
2591 break; /* don't do magic till later */
2592 }
2593#ifdef HAS_SETEUID
3280af22 2594 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2595#else
2596#ifdef HAS_SETREUID
b28d0864 2597 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2598#else
2599#ifdef HAS_SETRESUID
6b88bc9c 2600 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2601#else
b28d0864
NIS
2602 if (PL_euid == PL_uid) /* special case $> = $< */
2603 PerlProc_setuid(PL_euid);
a0d0e21e 2604 else {
e8ee3774 2605 PL_euid = PerlProc_geteuid();
cea2e8a9 2606 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2607 }
79072805
LW
2608#endif
2609#endif
85e6fe83 2610#endif
d8eceb89 2611 PL_euid = PerlProc_geteuid();
3280af22 2612 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2613 break;
2614 case '(':
38ab35f8 2615 PL_gid = SvIV(sv);
3280af22
NIS
2616 if (PL_delaymagic) {
2617 PL_delaymagic |= DM_RGID;
79072805
LW
2618 break; /* don't do magic till later */
2619 }
2620#ifdef HAS_SETRGID
b28d0864 2621 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2622#else
2623#ifdef HAS_SETREGID
3280af22 2624 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2625#else
2626#ifdef HAS_SETRESGID
b28d0864 2627 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2628#else
b28d0864
NIS
2629 if (PL_gid == PL_egid) /* special case $( = $) */
2630 (void)PerlProc_setgid(PL_gid);
748a9306 2631 else {
d8eceb89 2632 PL_gid = PerlProc_getgid();
cea2e8a9 2633 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2634 }
79072805
LW
2635#endif
2636#endif
85e6fe83 2637#endif
d8eceb89 2638 PL_gid = PerlProc_getgid();
3280af22 2639 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2640 break;
2641 case ')':
5cd24f17
PP
2642#ifdef HAS_SETGROUPS
2643 {
b83604b4 2644 const char *p = SvPV_const(sv, len);
757f63d8
SP
2645 Groups_t *gary = NULL;
2646
2647 while (isSPACE(*p))
2648 ++p;
2649 PL_egid = Atol(p);
2650 for (i = 0; i < NGROUPS; ++i) {
2651 while (*p && !isSPACE(*p))
2652 ++p;
2653 while (isSPACE(*p))
2654 ++p;
2655 if (!*p)
2656 break;
2657 if(!gary)
2658 Newx(gary, i + 1, Groups_t);
2659 else
2660 Renew(gary, i + 1, Groups_t);
2661 gary[i] = Atol(p);
2662 }
2663 if (i)
2664 (void)setgroups(i, gary);
f5a63d97 2665 Safefree(gary);
5cd24f17
PP
2666 }
2667#else /* HAS_SETGROUPS */
38ab35f8 2668 PL_egid = SvIV(sv);
5cd24f17 2669#endif /* HAS_SETGROUPS */
3280af22
NIS
2670 if (PL_delaymagic) {
2671 PL_delaymagic |= DM_EGID;
79072805
LW
2672 break; /* don't do magic till later */
2673 }
2674#ifdef HAS_SETEGID
3280af22 2675 (void)setegid((Gid_t)PL_egid);
79072805
LW
2676#else
2677#ifdef HAS_SETREGID
b28d0864 2678 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2679#else
2680#ifdef HAS_SETRESGID
b28d0864 2681 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2682#else
b28d0864
NIS
2683 if (PL_egid == PL_gid) /* special case $) = $( */
2684 (void)PerlProc_setgid(PL_egid);
748a9306 2685 else {
d8eceb89 2686 PL_egid = PerlProc_getegid();
cea2e8a9 2687 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2688 }
79072805
LW
2689#endif
2690#endif
85e6fe83 2691#endif
d8eceb89 2692 PL_egid = PerlProc_getegid();
3280af22 2693 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2694 break;
2695 case ':':
2d8e6c8d 2696 PL_chopset = SvPV_force(sv,len);
79072805 2697 break;
cd39f2b6 2698#ifndef MACOS_TRADITIONAL
79072805 2699 case '0':
e2975953 2700 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2701#ifdef HAS_SETPROCTITLE
2702 /* The BSDs don't show the argv[] in ps(1) output, they
2703 * show a string from the process struct and provide
2704 * the setproctitle() routine to manipulate that. */
a2722ac9 2705 if (PL_origalen != 1) {
b83604b4 2706 s = SvPV_const(sv, len);
98b76f99 2707# if __FreeBSD_version > 410001
9aad2c0e 2708 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2709 * but not the "(perl) suffix from the ps(1)
2710 * output, because that's what ps(1) shows if the
2711 * argv[] is modified. */
6f2ad931 2712 setproctitle("-%s", s);
9aad2c0e 2713# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2714 /* This doesn't really work if you assume that
2715 * $0 = 'foobar'; will wipe out 'perl' from the $0
2716 * because in ps(1) output the result will be like
2717 * sprintf("perl: %s (perl)", s)
2718 * I guess this is a security feature:
2719 * one (a user process) cannot get rid of the original name.
2720 * --jhi */
2721 setproctitle("%s", s);
2722# endif
2723 }
9d3968b2 2724#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2725 if (PL_origalen != 1) {
17aa7f3d 2726 union pstun un;
b83604b4 2727 s = SvPV_const(sv, len);
6867be6d 2728 un.pst_command = (char *)s;
17aa7f3d
JH
2729 pstat(PSTAT_SETCMD, un, len, 0, 0);
2730 }
9d3968b2 2731#else
2d2af554
GA
2732 if (PL_origalen > 1) {
2733 /* PL_origalen is set in perl_parse(). */
2734 s = SvPV_force(sv,len);
2735 if (len >= (STRLEN)PL_origalen-1) {
2736 /* Longer than original, will be truncated. We assume that
2737 * PL_origalen bytes are available. */
2738 Copy(s, PL_origargv[0], PL_origalen-1, char);
2739 }
2740 else {
2741 /* Shorter than original, will be padded. */
235ac35d 2742#ifdef PERL_DARWIN
60777a0d
JH
2743 /* Special case for Mac OS X: see [perl #38868] */
2744 const int pad = 0;
235ac35d 2745#else
8a89a4f1
MB
2746 /* Is the space counterintuitive? Yes.
2747 * (You were expecting \0?)
2748 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2749 * --jhi */
60777a0d 2750 const int pad = ' ';
235ac35d 2751#endif
60777a0d
JH
2752 Copy(s, PL_origargv[0], len, char);
2753 PL_origargv[0][len] = 0;
2754 memset(PL_origargv[0] + len + 1,
2755 pad, PL_origalen - len - 1);
2d2af554
GA
2756 }
2757 PL_origargv[0][PL_origalen-1] = 0;
2758 for (i = 1; i < PL_origargc; i++)
2759 PL_origargv[i] = 0;
79072805 2760 }
9d3968b2 2761#endif
e2975953 2762 UNLOCK_DOLLARZERO_MUTEX;
79072805 2763 break;
cd39f2b6 2764#endif
79072805
LW
2765 }
2766 return 0;
2767}
2768
2769I32
35a4481c 2770Perl_whichsig(pTHX_ const char *sig)
79072805 2771{
aadb217d 2772 register char* const* sigv;
96a5add6 2773 PERL_UNUSED_CONTEXT;
79072805 2774
aadb217d 2775 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2776 if (strEQ(sig,*sigv))
aadb217d 2777 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2778#ifdef SIGCLD
2779 if (strEQ(sig,"CHLD"))
2780 return SIGCLD;
2781#endif
2782#ifdef SIGCHLD
2783 if (strEQ(sig,"CLD"))
2784 return SIGCHLD;
2785#endif
7f1236c0 2786 return -1;
79072805
LW
2787}
2788
ecfc5424 2789Signal_t
1e82f5a6 2790#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2791Perl_sighandler(int sig, ...)
1e82f5a6
SH
2792#else
2793Perl_sighandler(int sig)
2794#endif
79072805 2795{
1018e26f
NIS
2796#ifdef PERL_GET_SIG_CONTEXT
2797 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2798#else
cea2e8a9 2799 dTHX;
71d280e3 2800#endif
79072805 2801 dSP;
a0714e2c
SS
2802 GV *gv = NULL;
2803 SV *sv = NULL;
8772537c 2804 SV * const tSv = PL_Sv;
601f1833 2805 CV *cv = NULL;
533c011a 2806 OP *myop = PL_op;
84902520 2807 U32 flags = 0;
8772537c 2808 XPV * const tXpv = PL_Xpv;
71d280e3 2809
3280af22 2810 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2811 flags |= 1;
3280af22 2812 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2813 flags |= 4;
3280af22 2814 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2815 flags |= 16;
2816
727405f8 2817 if (!PL_psig_ptr[sig]) {
99ef548b 2818 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2819 PL_sig_name[sig]);
2820 exit(sig);
2821 }
ff0cee69 2822
84902520
TB
2823 /* Max number of items pushed there is 3*n or 4. We cannot fix
2824 infinity, so we fix 4 (in fact 5): */
2825 if (flags & 1) {
3280af22 2826 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2827 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2828 }
ac27b0f5 2829 if (flags & 4)
3280af22 2830 PL_markstack_ptr++; /* Protect mark. */
84902520 2831 if (flags & 16)
3280af22 2832 PL_scopestack_ix += 1;
84902520 2833 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2834 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2835 || SvTYPE(cv) != SVt_PVCV) {
2836 HV *st;
f2c0649b 2837 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2838 }
84902520 2839
a0d0e21e 2840 if (!cv || !CvROOT(cv)) {
599cee73 2841 if (ckWARN(WARN_SIGNAL))
9014280d 2842 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2843 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2844 : ((cv && CvGV(cv))
2845 ? GvENAME(CvGV(cv))
2846 : "__ANON__")));
2847 goto cleanup;
79072805
LW
2848 }
2849
22c35a8c 2850 if(PL_psig_name[sig]) {
b37c2d43 2851 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2852 flags |= 64;
df3728a2 2853#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2854 PL_sig_sv = sv;
df3728a2 2855#endif
84902520 2856 } else {
ff0cee69 2857 sv = sv_newmortal();
22c35a8c 2858 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2859 }
e336de0d 2860
e788e7d3 2861 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2862 PUSHMARK(SP);
79072805 2863 PUSHs(sv);
8aad04aa
JH
2864#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2865 {
2866 struct sigaction oact;
2867
2868 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2869 siginfo_t *sip;
2870 va_list args;
2871
2872 va_start(args, sig);
2873 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2874 if (sip) {
2875 HV *sih = newHV();
2876 SV *rv = newRV_noinc((SV*)sih);
2877 /* The siginfo fields signo, code, errno, pid, uid,
2878 * addr, status, and band are defined by POSIX/SUSv3. */
2879 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2880 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2881#if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
ea1bde16 2882 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2883 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2884 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2885 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2886 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2887 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2888#endif
8aad04aa
JH
2889 EXTEND(SP, 2);
2890 PUSHs((SV*)rv);
10edeb5d 2891 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2892 }
b4552a27 2893
31427afe 2894 va_end(args);
8aad04aa
JH
2895 }
2896 }
2897#endif
79072805 2898 PUTBACK;
a0d0e21e 2899
1b266415 2900 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2901
d3acc0f7 2902 POPSTACK;
1b266415 2903 if (SvTRUE(ERRSV)) {
1d615522 2904#ifndef PERL_MICRO
983dbef6 2905#ifdef HAS_SIGPROCMASK
1b266415
NIS
2906 /* Handler "died", for example to get out of a restart-able read().
2907 * Before we re-do that on its behalf re-enable the signal which was
2908 * blocked by the system when we entered.
2909 */
2910 sigset_t set;
2911 sigemptyset(&set);
2912 sigaddset(&set,sig);
2913 sigprocmask(SIG_UNBLOCK, &set, NULL);
2914#else
2915 /* Not clear if this will work */
2916 (void)rsignal(sig, SIG_IGN);
5c1546dc 2917 (void)rsignal(sig, PL_csighandlerp);
1b266415 2918#endif
1d615522 2919#endif /* !PERL_MICRO */
bd61b366 2920 Perl_die(aTHX_ NULL);
1b266415 2921 }
00d579c5 2922cleanup:
84902520 2923 if (flags & 1)
3280af22 2924 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2925 if (flags & 4)
3280af22 2926 PL_markstack_ptr--;
84902520 2927 if (flags & 16)
3280af22 2928 PL_scopestack_ix -= 1;
84902520
TB
2929 if (flags & 64)
2930 SvREFCNT_dec(sv);
533c011a 2931 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2932
3280af22
NIS
2933 PL_Sv = tSv; /* Restore global temporaries. */
2934 PL_Xpv = tXpv;
53bb94e2 2935 return;
79072805 2936}
4e35701f
NIS
2937
2938
51371543 2939static void
8772537c 2940S_restore_magic(pTHX_ const void *p)
51371543 2941{
97aff369 2942 dVAR;
8772537c
AL
2943 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2944 SV* const sv = mgs->mgs_sv;
51371543
GS
2945
2946 if (!sv)
2947 return;
2948
2949 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2950 {
f8c7b90f 2951#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2952 /* While magic was saved (and off) sv_setsv may well have seen
2953 this SV as a prime candidate for COW. */
2954 if (SvIsCOW(sv))
e424a81e 2955 sv_force_normal_flags(sv, 0);
f9701176
NC
2956#endif
2957
51371543
GS
2958 if (mgs->mgs_flags)
2959 SvFLAGS(sv) |= mgs->mgs_flags;
2960 else
2961 mg_magical(sv);
2b77b520
YST
2962 if (SvGMAGICAL(sv)) {
2963 /* downgrade public flags to private,
2964 and discard any other private flags */
2965
10edeb5d
JH
2966 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2967 if (pubflags) {
2968 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2969 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2970 }
2971 }
51371543
GS
2972 }
2973
2974 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2975
2976 /* If we're still on top of the stack, pop us off. (That condition
2977 * will be satisfied if restore_magic was called explicitly, but *not*
2978 * if it's being called via leave_scope.)
2979 * The reason for doing this is that otherwise, things like sv_2cv()
2980 * may leave alloc gunk on the savestack, and some code
2981 * (e.g. sighandler) doesn't expect that...
2982 */
2983 if (PL_savestack_ix == mgs->mgs_ss_ix)
2984 {
2985 I32 popval = SSPOPINT;
c76ac1ee 2986 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2987 PL_savestack_ix -= 2;
2988 popval = SSPOPINT;
2989 assert(popval == SAVEt_ALLOC);
2990 popval = SSPOPINT;
2991 PL_savestack_ix -= popval;
2992 }
2993
2994}
2995
2996static void
8772537c 2997S_unwind_handler_stack(pTHX_ const void *p)
51371543 2998{
27da23d5 2999 dVAR;
e1ec3a88 3000 const U32 flags = *(const U32*)p;
51371543
GS
3001
3002 if (flags & 1)
3003 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 3004#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 3005 if (flags & 64)
27da23d5 3006 SvREFCNT_dec(PL_sig_sv);
df3728a2 3007#endif
51371543 3008}
1018e26f 3009
66610fdd 3010/*
b3ca2e83
NC
3011=for apidoc magic_sethint
3012
3013Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3014C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3015anything that would need a deep copy. Maybe we should warn if we find a
3016reference.
b3ca2e83
NC
3017
3018=cut
3019*/
3020int
3021Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3022{
3023 dVAR;
3024 assert(mg->mg_len == HEf_SVKEY);
3025
e6e3e454
NC
3026 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3027 an alternative leaf in there, with PL_compiling.cop_hints being used if
3028 it's NULL. If needed for threads, the alternative could lock a mutex,
3029 or take other more complex action. */
3030
5b9c0671
NC
3031 /* Something changed in %^H, so it will need to be restored on scope exit.
3032 Doing this here saves a lot of doing it manually in perl code (and
3033 forgetting to do it, and consequent subtle errors. */
3034 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3035 PL_compiling.cop_hints_hash
3036 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 3037 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
3038 return 0;
3039}
3040
3041/*
3042=for apidoc magic_sethint
3043
c28fe1ec
NC
3044Triggered by a delete from %^H, records the key to
3045C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3046
3047=cut
3048*/
3049int
3050Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3051{
3052 dVAR;
f5a63d97
AL
3053 PERL_UNUSED_ARG(sv);
3054
b3ca2e83
NC
3055 assert(mg->mg_len == HEf_SVKEY);
3056
b3f24c00
MHM
3057 PERL_UNUSED_ARG(sv);
3058
5b9c0671 3059 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3060 PL_compiling.cop_hints_hash
3061 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3062 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3063 return 0;
3064}
3065
3066/*
66610fdd
RGS
3067 * Local variables:
3068 * c-indentation-style: bsd
3069 * c-basic-offset: 4
3070 * indent-tabs-mode: t
3071 * End:
3072 *
37442d52
RGS
3073 * ex: set ts=8 sts=4 sw=4 noet:
3074 */