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reduce magic overhead of tainting (maybe other magic later)
[perl5.git] / mg.c
CommitLineData
a0d0e21e 1/* mg.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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/*
4ac71550
TC
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.
14 *
15 * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"]
79072805
LW
16 */
17
ccfc67b7
JH
18/*
19=head1 Magical Functions
166f8a29
DM
20
21"Magic" is special data attached to SV structures in order to give them
22"magical" properties. When any Perl code tries to read from, or assign to,
23an SV marked as magical, it calls the 'get' or 'set' function associated
24with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 25give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
26number of the last read filehandle into to the SV's IV slot), while
27set is called after an SV has been written to, in order to allow it to make
ddfa107c 28use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
29PL_rs global variable).
30
31Magic is implemented as a linked list of MAGIC structures attached to the
32SV. Each MAGIC struct holds the type of the magic, a pointer to an array
33of functions that implement the get(), set(), length() etc functions,
34plus space for some flags and pointers. For example, a tied variable has
35a MAGIC structure that contains a pointer to the object associated with the
36tie.
37
ccfc67b7
JH
38*/
39
79072805 40#include "EXTERN.h"
864dbfa3 41#define PERL_IN_MG_C
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LW
42#include "perl.h"
43
5cd24f17 44#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
45# ifdef I_GRP
46# include <grp.h>
47# endif
188ea221
CS
48#endif
49
757f63d8
SP
50#if defined(HAS_SETGROUPS)
51# ifndef NGROUPS
52# define NGROUPS 32
53# endif
54#endif
55
17aa7f3d
JH
56#ifdef __hpux
57# include <sys/pstat.h>
58#endif
59
7636ea95
AB
60#ifdef HAS_PRCTL_SET_NAME
61# include <sys/prctl.h>
62#endif
63
8aad04aa 64#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 65Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 66#else
e69880a5 67Signal_t Perl_csighandler(int sig);
8aad04aa 68#endif
e69880a5 69
9cffb111
OS
70#ifdef __Lynx__
71/* Missing protos on LynxOS */
72void setruid(uid_t id);
73void seteuid(uid_t id);
74void setrgid(uid_t id);
75void setegid(uid_t id);
76#endif
77
c07a80fd 78/*
4bac9ae4 79 * Pre-magic setup and post-magic takedown.
c07a80fd
PP
80 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
81 */
82
83struct magic_state {
84 SV* mgs_sv;
455ece5e 85 I32 mgs_ss_ix;
f9c6fee5
CS
86 U32 mgs_magical;
87 bool mgs_readonly;
150b625d 88 bool mgs_bumped;
c07a80fd 89};
455ece5e 90/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
91
92STATIC void
8fb26106 93S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 94{
97aff369 95 dVAR;
455ece5e 96 MGS* mgs;
150b625d 97 bool bumped = FALSE;
7918f24d
NC
98
99 PERL_ARGS_ASSERT_SAVE_MAGIC;
100
4bac9ae4
CS
101 assert(SvMAGICAL(sv));
102
150b625d
DM
103 /* we shouldn't really be called here with RC==0, but it can sometimes
104 * happen via mg_clear() (which also shouldn't be called when RC==0,
105 * but it can happen). Handle this case gracefully(ish) by not RC++
106 * and thus avoiding the resultant double free */
107 if (SvREFCNT(sv) > 0) {
108 /* guard against sv getting freed midway through the mg clearing,
109 * by holding a private reference for the duration. */
110 SvREFCNT_inc_simple_void_NN(sv);
111 bumped = TRUE;
112 }
8985fe98 113
d8b2590f
NC
114 /* Turning READONLY off for a copy-on-write scalar (including shared
115 hash keys) is a bad idea. */
765f542d 116 if (SvIsCOW(sv))
9a265e59 117 sv_force_normal_flags(sv, 0);
c07a80fd 118
8772537c 119 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
120
121 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd 122 mgs->mgs_sv = sv;
f9c6fee5
CS
123 mgs->mgs_magical = SvMAGICAL(sv);
124 mgs->mgs_readonly = SvREADONLY(sv) != 0;
455ece5e 125 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
150b625d 126 mgs->mgs_bumped = bumped;
c07a80fd
PP
127
128 SvMAGICAL_off(sv);
129 SvREADONLY_off(sv);
c07a80fd
PP
130}
131
954c1994
GS
132/*
133=for apidoc mg_magical
134
135Turns on the magical status of an SV. See C<sv_magic>.
136
137=cut
138*/
139
8990e307 140void
864dbfa3 141Perl_mg_magical(pTHX_ SV *sv)
8990e307 142{
e1ec3a88 143 const MAGIC* mg;
7918f24d 144 PERL_ARGS_ASSERT_MG_MAGICAL;
96a5add6 145 PERL_UNUSED_CONTEXT;
f9c6fee5
CS
146
147 SvMAGICAL_off(sv);
218787bd 148 if ((mg = SvMAGIC(sv))) {
218787bd
VP
149 do {
150 const MGVTBL* const vtbl = mg->mg_virtual;
151 if (vtbl) {
152 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
153 SvGMAGICAL_on(sv);
154 if (vtbl->svt_set)
155 SvSMAGICAL_on(sv);
156 if (vtbl->svt_clear)
157 SvRMAGICAL_on(sv);
158 }
159 } while ((mg = mg->mg_moremagic));
160 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
161 SvRMAGICAL_on(sv);
8990e307
LW
162 }
163}
164
954c1994
GS
165/*
166=for apidoc mg_get
167
168Do magic after a value is retrieved from the SV. See C<sv_magic>.
169
170=cut
171*/
172
79072805 173int
864dbfa3 174Perl_mg_get(pTHX_ SV *sv)
79072805 175{
97aff369 176 dVAR;
35a4481c 177 const I32 mgs_ix = SSNEW(sizeof(MGS));
a9844598 178 bool saved = FALSE;
f9c6fee5 179 bool have_new = 0;
ff76feab 180 MAGIC *newmg, *head, *cur, *mg;
6683b158 181
7918f24d
NC
182 PERL_ARGS_ASSERT_MG_GET;
183
407287f9
FC
184 if (PL_localizing == 1 && sv == DEFSV) return 0;
185
ff76feab
AMS
186 /* We must call svt_get(sv, mg) for each valid entry in the linked
187 list of magic. svt_get() may delete the current entry, add new
188 magic to the head of the list, or upgrade the SV. AMS 20010810 */
189
190 newmg = cur = head = mg = SvMAGIC(sv);
191 while (mg) {
35a4481c 192 const MGVTBL * const vtbl = mg->mg_virtual;
f9c6fee5 193 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
ff76feab 194
2b260de0 195 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
a9844598
CS
196
197 /* taint's mg get is so dumb it doesn't need flag saving */
198 if (!saved && mg->mg_type != PERL_MAGIC_taint) {
199 save_magic(mgs_ix, sv);
200 saved = TRUE;
201 }
202
16c91539 203 vtbl->svt_get(aTHX_ sv, mg);
b77f7d40 204
58f82c5c
DM
205 /* guard against magic having been deleted - eg FETCH calling
206 * untie */
f9c6fee5
CS
207 if (!SvMAGIC(sv)) {
208 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
58f82c5c 209 break;
f9c6fee5 210 }
b77f7d40 211
f9c6fee5 212 /* recalculate flags if this entry was deleted. */
ff76feab 213 if (mg->mg_flags & MGf_GSKIP)
f9c6fee5 214 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
a0d0e21e 215 }
ff76feab 216
f9c6fee5 217 mg = nextmg;
ff76feab 218
0723351e 219 if (have_new) {
ff76feab
AMS
220 /* Have we finished with the new entries we saw? Start again
221 where we left off (unless there are more new entries). */
222 if (mg == head) {
0723351e 223 have_new = 0;
ff76feab
AMS
224 mg = cur;
225 head = newmg;
226 }
227 }
228
229 /* Were any new entries added? */
0723351e
NC
230 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
231 have_new = 1;
ff76feab
AMS
232 cur = mg;
233 mg = newmg;
f9c6fee5 234 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
760ac839 235 }
79072805 236 }
463ee0b2 237
a9844598
CS
238 if (saved)
239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
240
79072805
LW
241 return 0;
242}
243
954c1994
GS
244/*
245=for apidoc mg_set
246
247Do magic after a value is assigned to the SV. See C<sv_magic>.
248
249=cut
250*/
251
79072805 252int
864dbfa3 253Perl_mg_set(pTHX_ SV *sv)
79072805 254{
97aff369 255 dVAR;
35a4481c 256 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 257 MAGIC* mg;
463ee0b2
LW
258 MAGIC* nextmg;
259
7918f24d
NC
260 PERL_ARGS_ASSERT_MG_SET;
261
b5ed8c44
FC
262 if (PL_localizing == 2 && sv == DEFSV) return 0;
263
455ece5e 264 save_magic(mgs_ix, sv);
463ee0b2
LW
265
266 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 267 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 268 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
269 if (mg->mg_flags & MGf_GSKIP) {
270 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
f9c6fee5 271 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
a0d0e21e 272 }
e0a73de4 273 if (PL_localizing == 2
b5ed8c44 274 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
e7cbf6c6 275 continue;
2b260de0 276 if (vtbl && vtbl->svt_set)
16c91539 277 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
7918f24d
NC
299 PERL_ARGS_ASSERT_MG_LENGTH;
300
79072805 301 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 302 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 303 if (vtbl && vtbl->svt_len) {
35a4481c 304 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 305 save_magic(mgs_ix, sv);
a0d0e21e 306 /* omit MGf_GSKIP -- not changed here */
16c91539 307 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 308 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
309 return len;
310 }
311 }
312
d0644529
NC
313 {
314 /* You can't know whether it's UTF-8 until you get the string again...
315 */
10516c54 316 const U8 *s = (U8*)SvPV_const(sv, len);
d0644529
NC
317
318 if (DO_UTF8(sv)) {
319 len = utf8_length(s, s + len);
320 }
5636d518 321 }
463ee0b2 322 return len;
79072805
LW
323}
324
8fb26106 325I32
864dbfa3 326Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
327{
328 MAGIC* mg;
ac27b0f5 329
7918f24d
NC
330 PERL_ARGS_ASSERT_MG_SIZE;
331
93965878 332 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 333 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 334 if (vtbl && vtbl->svt_len) {
35a4481c
AL
335 const I32 mgs_ix = SSNEW(sizeof(MGS));
336 I32 len;
455ece5e 337 save_magic(mgs_ix, sv);
93965878 338 /* omit MGf_GSKIP -- not changed here */
16c91539 339 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 340 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
341 return len;
342 }
343 }
344
345 switch(SvTYPE(sv)) {
346 case SVt_PVAV:
502c6561 347 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
93965878
NIS
348 case SVt_PVHV:
349 /* FIXME */
350 default:
cea2e8a9 351 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
352 break;
353 }
354 return 0;
355}
356
954c1994
GS
357/*
358=for apidoc mg_clear
359
360Clear something magical that the SV represents. See C<sv_magic>.
361
362=cut
363*/
364
79072805 365int
864dbfa3 366Perl_mg_clear(pTHX_ SV *sv)
79072805 367{
35a4481c 368 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 369 MAGIC* mg;
8ac77ac9 370 MAGIC *nextmg;
463ee0b2 371
7918f24d
NC
372 PERL_ARGS_ASSERT_MG_CLEAR;
373
455ece5e 374 save_magic(mgs_ix, sv);
463ee0b2 375
8ac77ac9 376 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
35a4481c 377 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 378 /* omit GSKIP -- never set here */
727405f8 379
8ac77ac9
NC
380 nextmg = mg->mg_moremagic; /* it may delete itself */
381
2b260de0 382 if (vtbl && vtbl->svt_clear)
16c91539 383 vtbl->svt_clear(aTHX_ sv, mg);
79072805 384 }
463ee0b2 385
8772537c 386 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
387 return 0;
388}
389
ed624ca8 390static MAGIC*
39de7f53
FR
391S_mg_findext_flags(pTHX_ const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
392{
393 PERL_UNUSED_CONTEXT;
394
395 assert(flags <= 1);
396
397 if (sv) {
398 MAGIC *mg;
399
400 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
401 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
402 return mg;
403 }
404 }
405 }
406
407 return NULL;
408}
409
954c1994
GS
410/*
411=for apidoc mg_find
412
413Finds the magic pointer for type matching the SV. See C<sv_magic>.
414
415=cut
416*/
417
93a17b20 418MAGIC*
35a4481c 419Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 420{
39de7f53
FR
421 return S_mg_findext_flags(aTHX_ sv, type, NULL, 0);
422}
423
424/*
425=for apidoc mg_findext
426
427Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
428C<sv_magicext>.
429
430=cut
431*/
432
433MAGIC*
434Perl_mg_findext(pTHX_ const SV *sv, int type, const MGVTBL *vtbl)
435{
436 return S_mg_findext_flags(aTHX_ sv, type, vtbl, 1);
93a17b20
LW
437}
438
954c1994
GS
439/*
440=for apidoc mg_copy
441
442Copies the magic from one SV to another. See C<sv_magic>.
443
444=cut
445*/
446
79072805 447int
864dbfa3 448Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 449{
463ee0b2 450 int count = 0;
79072805 451 MAGIC* mg;
7918f24d
NC
452
453 PERL_ARGS_ASSERT_MG_COPY;
454
463ee0b2 455 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 456 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93 457 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
16c91539 458 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
68795e93 459 }
823a54a3
AL
460 else {
461 const char type = mg->mg_type;
1e73acc8 462 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
463 sv_magic(nsv,
464 (type == PERL_MAGIC_tied)
465 ? SvTIED_obj(sv, mg)
466 : (type == PERL_MAGIC_regdata && mg->mg_obj)
467 ? sv
468 : mg->mg_obj,
469 toLOWER(type), key, klen);
470 count++;
471 }
79072805 472 }
79072805 473 }
463ee0b2 474 return count;
79072805
LW
475}
476
954c1994 477/*
0cbee0a4
DM
478=for apidoc mg_localize
479
9711599e
CS
480Copy some of the magic from an existing SV to new localized version of that
481SV. Container magic (eg %ENV, $1, tie) gets copied, value magic doesn't (eg
482taint, pos).
483
af7df257 484If setmagic is false then no set magic will be called on the new (empty) SV.
9711599e
CS
485This typically means that assignment will soon follow (e.g. 'local $x = $y'),
486and that will handle the magic.
0cbee0a4
DM
487
488=cut
489*/
490
491void
af7df257 492Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
0cbee0a4 493{
97aff369 494 dVAR;
0cbee0a4 495 MAGIC *mg;
7918f24d
NC
496
497 PERL_ARGS_ASSERT_MG_LOCALIZE;
498
658a9f31
JD
499 if (nsv == DEFSV)
500 return;
501
0cbee0a4 502 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 503 const MGVTBL* const vtbl = mg->mg_virtual;
e0a73de4 504 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
0cbee0a4 505 continue;
0cbee0a4 506
a5063e7c 507 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
16c91539 508 (void)vtbl->svt_local(aTHX_ nsv, mg);
a5063e7c 509 else
0cbee0a4
DM
510 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
511 mg->mg_ptr, mg->mg_len);
a5063e7c 512
0cbee0a4 513 /* container types should remain read-only across localization */
b2b95e4c 514 if (!SvIsCOW(sv)) SvFLAGS(nsv) |= SvREADONLY(sv);
0cbee0a4
DM
515 }
516
517 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
518 SvFLAGS(nsv) |= SvMAGICAL(sv);
af7df257 519 if (setmagic) {
9711599e
CS
520 PL_localizing = 1;
521 SvSETMAGIC(nsv);
522 PL_localizing = 0;
523 }
0cbee0a4
DM
524 }
525}
526
d9088386
Z
527#define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
528static void
529S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
530{
531 const MGVTBL* const vtbl = mg->mg_virtual;
532 if (vtbl && vtbl->svt_free)
533 vtbl->svt_free(aTHX_ sv, mg);
534 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
535 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
536 Safefree(mg->mg_ptr);
537 else if (mg->mg_len == HEf_SVKEY)
538 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
539 }
540 if (mg->mg_flags & MGf_REFCOUNTED)
541 SvREFCNT_dec(mg->mg_obj);
542 Safefree(mg);
543}
544
0cbee0a4 545/*
954c1994
GS
546=for apidoc mg_free
547
548Free any magic storage used by the SV. See C<sv_magic>.
549
550=cut
551*/
552
79072805 553int
864dbfa3 554Perl_mg_free(pTHX_ SV *sv)
79072805
LW
555{
556 MAGIC* mg;
557 MAGIC* moremagic;
7918f24d
NC
558
559 PERL_ARGS_ASSERT_MG_FREE;
560
79072805 561 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
79072805 562 moremagic = mg->mg_moremagic;
d9088386 563 mg_free_struct(sv, mg);
c826f41b 564 SvMAGIC_set(sv, moremagic);
79072805 565 }
b162af07 566 SvMAGIC_set(sv, NULL);
68f8932e 567 SvMAGICAL_off(sv);
79072805
LW
568 return 0;
569}
570
d9088386
Z
571/*
572=for apidoc Am|void|mg_free_type|SV *sv|int how
573
574Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
575
576=cut
577*/
578
579void
580Perl_mg_free_type(pTHX_ SV *sv, int how)
581{
582 MAGIC *mg, *prevmg, *moremg;
583 PERL_ARGS_ASSERT_MG_FREE_TYPE;
584 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
585 MAGIC *newhead;
586 moremg = mg->mg_moremagic;
587 if (mg->mg_type == how) {
588 /* temporarily move to the head of the magic chain, in case
589 custom free code relies on this historical aspect of mg_free */
590 if (prevmg) {
591 prevmg->mg_moremagic = moremg;
592 mg->mg_moremagic = SvMAGIC(sv);
593 SvMAGIC_set(sv, mg);
594 }
595 newhead = mg->mg_moremagic;
596 mg_free_struct(sv, mg);
597 SvMAGIC_set(sv, newhead);
598 mg = prevmg;
599 }
600 }
601 mg_magical(sv);
602}
603
79072805 604#include <signal.h>
79072805 605
942e002e 606U32
864dbfa3 607Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 608{
97aff369 609 dVAR;
8772537c 610 PERL_UNUSED_ARG(sv);
6cef1e77 611
7918f24d
NC
612 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
613
0bd48802
AL
614 if (PL_curpm) {
615 register const REGEXP * const rx = PM_GETRE(PL_curpm);
616 if (rx) {
a678b0e4
YO
617 if (mg->mg_obj) { /* @+ */
618 /* return the number possible */
07bc277f 619 return RX_NPARENS(rx);
a678b0e4 620 } else { /* @- */
07bc277f 621 I32 paren = RX_LASTPAREN(rx);
a678b0e4
YO
622
623 /* return the last filled */
f46c4081 624 while ( paren >= 0
07bc277f
NC
625 && (RX_OFFS(rx)[paren].start == -1
626 || RX_OFFS(rx)[paren].end == -1) )
f46c4081 627 paren--;
a678b0e4
YO
628 return (U32)paren;
629 }
0bd48802 630 }
8f580fb8 631 }
ac27b0f5 632
942e002e 633 return (U32)-1;
6cef1e77
IZ
634}
635
636int
864dbfa3 637Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 638{
97aff369 639 dVAR;
7918f24d
NC
640
641 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
642
0bd48802
AL
643 if (PL_curpm) {
644 register const REGEXP * const rx = PM_GETRE(PL_curpm);
645 if (rx) {
646 register const I32 paren = mg->mg_len;
647 register I32 s;
648 register I32 t;
649 if (paren < 0)
650 return 0;
07bc277f
NC
651 if (paren <= (I32)RX_NPARENS(rx) &&
652 (s = RX_OFFS(rx)[paren].start) != -1 &&
653 (t = RX_OFFS(rx)[paren].end) != -1)
0bd48802
AL
654 {
655 register I32 i;
656 if (mg->mg_obj) /* @+ */
657 i = t;
658 else /* @- */
659 i = s;
660
661 if (i > 0 && RX_MATCH_UTF8(rx)) {
07bc277f 662 const char * const b = RX_SUBBEG(rx);
0bd48802 663 if (b)
f5a63d97 664 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 665 }
727405f8 666
0bd48802 667 sv_setiv(sv, i);
1aa99e6b 668 }
0bd48802 669 }
6cef1e77
IZ
670 }
671 return 0;
672}
673
e4b89193 674int
a29d06ed
MG
675Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
676{
7918f24d 677 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
d4c19fe8
AL
678 PERL_UNUSED_ARG(sv);
679 PERL_UNUSED_ARG(mg);
6ad8f254 680 Perl_croak_no_modify(aTHX);
0dbb1585 681 NORETURN_FUNCTION_END;
a29d06ed
MG
682}
683
93a17b20 684U32
864dbfa3 685Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 686{
97aff369 687 dVAR;
93a17b20 688 register I32 paren;
93a17b20 689 register I32 i;
2fdbfb4d
AB
690 register const REGEXP * rx;
691 const char * const remaining = mg->mg_ptr + 1;
93a17b20 692
7918f24d
NC
693 PERL_ARGS_ASSERT_MAGIC_LEN;
694
93a17b20 695 switch (*mg->mg_ptr) {
2fdbfb4d
AB
696 case '\020':
697 if (*remaining == '\0') { /* ^P */
698 break;
699 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
700 goto do_prematch;
701 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
702 goto do_postmatch;
703 }
704 break;
705 case '\015': /* $^MATCH */
706 if (strEQ(remaining, "ATCH")) {
707 goto do_match;
708 } else {
709 break;
710 }
711 case '`':
712 do_prematch:
f1b875a0 713 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
714 goto maybegetparen;
715 case '\'':
716 do_postmatch:
f1b875a0 717 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
718 goto maybegetparen;
719 case '&':
720 do_match:
f1b875a0 721 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d 722 goto maybegetparen;
93a17b20 723 case '1': case '2': case '3': case '4':
2fdbfb4d
AB
724 case '5': case '6': case '7': case '8': case '9':
725 paren = atoi(mg->mg_ptr);
726 maybegetparen:
aaa362c4 727 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
728 getparen:
729 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 730
ffc61ed2 731 if (i < 0)
0844c848 732 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 733 return i;
2fdbfb4d 734 } else {
235bddc8 735 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 736 report_uninit(sv);
2fdbfb4d 737 return 0;
93a17b20 738 }
93a17b20 739 case '+':
aaa362c4 740 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 741 paren = RX_LASTPAREN(rx);
13f57bf8
CS
742 if (paren)
743 goto getparen;
93a17b20 744 }
748a9306 745 return 0;
a01268b5
JH
746 case '\016': /* ^N */
747 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 748 paren = RX_LASTCLOSEPAREN(rx);
a01268b5
JH
749 if (paren)
750 goto getparen;
751 }
752 return 0;
93a17b20
LW
753 }
754 magic_get(sv,mg);
2d8e6c8d 755 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 756 sv_2pv(sv, 0);
2d8e6c8d 757 }
93a17b20
LW
758 if (SvPOK(sv))
759 return SvCUR(sv);
760 return 0;
761}
762
ad3296c6 763#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
764 if (SvPOK(sv)) { \
765 STRLEN len = SvCUR(sv); \
766 char * const p = SvPVX(sv); \
8e6b4db6
PC
767 while (len > 0 && isSPACE(p[len-1])) \
768 --len; \
769 SvCUR_set(sv, len); \
770 p[len] = '\0'; \
771 } \
ad3296c6
SH
772} STMT_END
773
8b850bd5
NC
774void
775Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
776{
7918f24d
NC
777 PERL_ARGS_ASSERT_EMULATE_COP_IO;
778
8b850bd5
NC
779 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
780 sv_setsv(sv, &PL_sv_undef);
781 else {
782 sv_setpvs(sv, "");
783 SvUTF8_off(sv);
784 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
20439bc7 785 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
8b850bd5
NC
786 assert(value);
787 sv_catsv(sv, value);
788 }
789 sv_catpvs(sv, "\0");
790 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
20439bc7 791 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
8b850bd5
NC
792 assert(value);
793 sv_catsv(sv, value);
794 }
795 }
796}
797
25bbd826
CB
798#ifdef VMS
799#include <descrip.h>
800#include <starlet.h>
801#endif
802
79072805 803int
864dbfa3 804Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 805{
27da23d5 806 dVAR;
79072805 807 register I32 paren;
db7198b5 808 register const char *s = NULL;
d9f97599 809 register REGEXP *rx;
823a54a3
AL
810 const char * const remaining = mg->mg_ptr + 1;
811 const char nextchar = *remaining;
79072805 812
7918f24d
NC
813 PERL_ARGS_ASSERT_MAGIC_GET;
814
79072805 815 switch (*mg->mg_ptr) {
748a9306 816 case '\001': /* ^A */
3280af22 817 sv_setsv(sv, PL_bodytarget);
125b9982
NT
818 if (SvTAINTED(PL_bodytarget))
819 SvTAINTED_on(sv);
748a9306 820 break;
e5218da5 821 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 822 if (nextchar == '\0') {
e5218da5
GA
823 sv_setiv(sv, (IV)PL_minus_c);
824 }
823a54a3 825 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
826 sv_setiv(sv, (IV)STATUS_NATIVE);
827 }
49460fe6
NIS
828 break;
829
79072805 830 case '\004': /* ^D */
aea4f609 831 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 832 break;
28f23441 833 case '\005': /* ^E */
823a54a3 834 if (nextchar == '\0') {
e37778c2 835#if defined(VMS)
0a378802 836 {
0a378802
JH
837 char msg[255];
838 $DESCRIPTOR(msgdsc,msg);
839 sv_setnv(sv,(NV) vaxc$errno);
840 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
841 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
842 else
76f68e9b 843 sv_setpvs(sv,"");
0a378802 844 }
4b645107 845#elif defined(OS2)
0a378802
JH
846 if (!(_emx_env & 0x200)) { /* Under DOS */
847 sv_setnv(sv, (NV)errno);
848 sv_setpv(sv, errno ? Strerror(errno) : "");
849 } else {
850 if (errno != errno_isOS2) {
823a54a3 851 const int tmp = _syserrno();
0a378802
JH
852 if (tmp) /* 2nd call to _syserrno() makes it 0 */
853 Perl_rc = tmp;
854 }
855 sv_setnv(sv, (NV)Perl_rc);
856 sv_setpv(sv, os2error(Perl_rc));
857 }
4b645107 858#elif defined(WIN32)
0a378802 859 {
d4c19fe8 860 const DWORD dwErr = GetLastError();
0a378802 861 sv_setnv(sv, (NV)dwErr);
823a54a3 862 if (dwErr) {
0a378802
JH
863 PerlProc_GetOSError(sv, dwErr);
864 }
865 else
76f68e9b 866 sv_setpvs(sv, "");
0a378802
JH
867 SetLastError(dwErr);
868 }
22fae026 869#else
f6c8f21d 870 {
4ee39169 871 dSAVE_ERRNO;
f6c8f21d 872 sv_setnv(sv, (NV)errno);
666ea192 873 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 874 RESTORE_ERRNO;
f6c8f21d 875 }
28f23441 876#endif
ad3296c6 877 SvRTRIM(sv);
0a378802
JH
878 SvNOK_on(sv); /* what a wonderful hack! */
879 }
823a54a3 880 else if (strEQ(remaining, "NCODING"))
0a378802
JH
881 sv_setsv(sv, PL_encoding);
882 break;
79072805 883 case '\006': /* ^F */
3280af22 884 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 885 break;
9ebf26ad
FR
886 case '\007': /* ^GLOBAL_PHASE */
887 if (strEQ(remaining, "LOBAL_PHASE")) {
888 sv_setpvn(sv, PL_phase_names[PL_phase],
889 strlen(PL_phase_names[PL_phase]));
890 }
891 break;
a0d0e21e 892 case '\010': /* ^H */
3280af22 893 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 894 break;
9d116dd7 895 case '\011': /* ^I */ /* NOT \t in EBCDIC */
120f7abe 896 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
79072805 897 break;
ac27b0f5 898 case '\017': /* ^O & ^OPEN */
823a54a3 899 if (nextchar == '\0') {
ac27b0f5 900 sv_setpv(sv, PL_osname);
3511154c
DM
901 SvTAINTED_off(sv);
902 }
823a54a3 903 else if (strEQ(remaining, "PEN")) {
8b850bd5 904 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 905 }
28f23441 906 break;
9ebf26ad 907 case '\020':
cde0cee5
YO
908 if (nextchar == '\0') { /* ^P */
909 sv_setiv(sv, (IV)PL_perldb);
910 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
911 goto do_prematch_fetch;
912 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
913 goto do_postmatch_fetch;
914 }
79072805 915 break;
fb73857a 916 case '\023': /* ^S */
823a54a3 917 if (nextchar == '\0') {
bc177e6b 918 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 919 SvOK_off(sv);
3280af22 920 else if (PL_in_eval)
6dc8a9e4 921 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
922 else
923 sv_setiv(sv, 0);
d58bf5aa 924 }
fb73857a 925 break;
79072805 926 case '\024': /* ^T */
823a54a3 927 if (nextchar == '\0') {
88e89b8a 928#ifdef BIG_TIME
7c36658b 929 sv_setnv(sv, PL_basetime);
88e89b8a 930#else
7c36658b 931 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 932#endif
7c36658b 933 }
823a54a3 934 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
935 sv_setiv(sv, PL_tainting
936 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
937 : 0);
7c36658b 938 break;
e07ea26a 939 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 940 if (strEQ(remaining, "NICODE"))
a05d7ebb 941 sv_setuv(sv, (UV) PL_unicode);
823a54a3 942 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 943 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
944 else if (strEQ(remaining, "TF8CACHE"))
945 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
946 break;
947 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 948 if (nextchar == '\0')
4438c4b7 949 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 950 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 951 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 952 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
953 }
954 else if (PL_compiling.cop_warnings == pWARN_STD) {
7e4f0450
FC
955 sv_setsv(sv, &PL_sv_undef);
956 break;
013b78e8 957 }
d3a7d8c7 958 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
959 /* Get the bit mask for $warnings::Bits{all}, because
960 * it could have been extended by warnings::register */
4bac9ae4
CS
961 HV * const bits = get_hv("warnings::Bits", 0);
962 SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL;
963 if (bits_all)
964 sv_copypv(sv, *bits_all);
965 else
966 sv_setpvn(sv, WARN_ALLstring, WARNsize);
ac27b0f5 967 }
4438c4b7 968 else {
72dc9ed5
NC
969 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
970 *PL_compiling.cop_warnings);
ac27b0f5 971 }
4438c4b7 972 }
79072805 973 break;
cde0cee5
YO
974 case '\015': /* $^MATCH */
975 if (strEQ(remaining, "ATCH")) {
79072805
LW
976 case '1': case '2': case '3': case '4':
977 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
978 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
979 /*
159b6efe 980 * Pre-threads, this was paren = atoi(GvENAME((const GV *)mg->mg_obj));
cde0cee5
YO
981 * XXX Does the new way break anything?
982 */
983 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 984 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO
985 break;
986 }
987 sv_setsv(sv,&PL_sv_undef);
79072805
LW
988 }
989 break;
990 case '+':
aaa362c4 991 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC
992 if (RX_LASTPAREN(rx)) {
993 CALLREG_NUMBUF_FETCH(rx,RX_LASTPAREN(rx),sv);
44a2ac75
YO
994 break;
995 }
79072805 996 }
3280af22 997 sv_setsv(sv,&PL_sv_undef);
79072805 998 break;
a01268b5
JH
999 case '\016': /* ^N */
1000 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC
1001 if (RX_LASTCLOSEPAREN(rx)) {
1002 CALLREG_NUMBUF_FETCH(rx,RX_LASTCLOSEPAREN(rx),sv);
44a2ac75
YO
1003 break;
1004 }
1005
a01268b5
JH
1006 }
1007 sv_setsv(sv,&PL_sv_undef);
1008 break;
79072805 1009 case '`':
cde0cee5 1010 do_prematch_fetch:
aaa362c4 1011 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 1012 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 1013 break;
79072805 1014 }
3280af22 1015 sv_setsv(sv,&PL_sv_undef);
79072805
LW
1016 break;
1017 case '\'':
cde0cee5 1018 do_postmatch_fetch:
aaa362c4 1019 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 1020 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 1021 break;
79072805 1022 }
3280af22 1023 sv_setsv(sv,&PL_sv_undef);
79072805
LW
1024 break;
1025 case '.':
3280af22 1026 if (GvIO(PL_last_in_gv)) {
357c8808 1027 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 1028 }
79072805
LW
1029 break;
1030 case '?':
809a5acc 1031 {
809a5acc 1032 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 1033#ifdef COMPLEX_STATUS
41cb7b2b 1034 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
1035 LvTARGOFF(sv) = PL_statusvalue;
1036 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 1037#endif
809a5acc 1038 }
79072805
LW
1039 break;
1040 case '^':
acbe1b9d 1041 if (GvIOp(PL_defoutgv))
099be4f1 1042 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
1043 if (s)
1044 sv_setpv(sv,s);
1045 else {
3280af22 1046 sv_setpv(sv,GvENAME(PL_defoutgv));
cb421d5e 1047 sv_catpvs(sv,"_TOP");
79072805
LW
1048 }
1049 break;
1050 case '~':
acbe1b9d 1051 if (GvIOp(PL_defoutgv))
0daa599b 1052 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 1053 if (!s)
3280af22 1054 s = GvENAME(PL_defoutgv);
79072805
LW
1055 sv_setpv(sv,s);
1056 break;
79072805 1057 case '=':
099be4f1 1058 if (GvIO(PL_defoutgv))
0daa599b 1059 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
1060 break;
1061 case '-':
099be4f1 1062 if (GvIO(PL_defoutgv))
0daa599b 1063 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
1064 break;
1065 case '%':
099be4f1 1066 if (GvIO(PL_defoutgv))
0daa599b 1067 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 1068 break;
79072805
LW
1069 case ':':
1070 break;
1071 case '/':
1072 break;
1073 case '[':
e1dccc0d 1074 sv_setiv(sv, 0);
79072805
LW
1075 break;
1076 case '|':
099be4f1 1077 if (GvIO(PL_defoutgv))
0daa599b 1078 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805 1079 break;
79072805 1080 case '\\':
b2ce0fda 1081 if (PL_ors_sv)
f28098ff 1082 sv_copypv(sv, PL_ors_sv);
4bac9ae4
CS
1083 else
1084 sv_setsv(sv, &PL_sv_undef);
79072805 1085 break;
0e219455 1086 case '$': /* $$ */
9cdac2a2
FC
1087 {
1088 IV const pid = (IV)PerlProc_getpid();
19db9fb7 1089 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
9cdac2a2
FC
1090 /* never set manually, or at least not since last fork */
1091 sv_setiv(sv, pid);
19db9fb7
Z
1092 /* never unsafe, even if reading in a tainted expression */
1093 SvTAINTED_off(sv);
1094 }
9cdac2a2
FC
1095 /* else a value has been assigned manually, so do nothing */
1096 }
0e219455
MM
1097 break;
1098
79072805 1099 case '!':
666d8aa2
CB
1100 {
1101 dSAVE_ERRNO;
a5f75d66 1102#ifdef VMS
65202027 1103 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
a5f75d66 1104#else
65202027 1105 sv_setnv(sv, (NV)errno);
666d8aa2 1106#endif
88e89b8a 1107#ifdef OS2
ed344e4f
IZ
1108 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1109 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 1110 else
a5f75d66 1111#endif
666ea192 1112 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 1113 RESTORE_ERRNO;
88e89b8a 1114 }
666d8aa2 1115
ad3296c6 1116 SvRTRIM(sv);
946ec16e 1117 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1118 break;
1119 case '<':
985213f2 1120 sv_setiv(sv, (IV)PerlProc_getuid());
79072805
LW
1121 break;
1122 case '>':
985213f2 1123 sv_setiv(sv, (IV)PerlProc_geteuid());
79072805
LW
1124 break;
1125 case '(':
985213f2 1126 sv_setiv(sv, (IV)PerlProc_getgid());
79072805
LW
1127 goto add_groups;
1128 case ')':
985213f2 1129 sv_setiv(sv, (IV)PerlProc_getegid());
79072805 1130 add_groups:
79072805 1131#ifdef HAS_GETGROUPS
79072805 1132 {
57d7c65e 1133 Groups_t *gary = NULL;
fb45abb2 1134 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1135 Newx(gary, num_groups, Groups_t);
1136 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1137 for (i = 0; i < num_groups; i++)
1138 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1139 Safefree(gary);
79072805 1140 }
155aba94 1141 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1142#endif
79072805 1143 break;
79072805
LW
1144 case '0':
1145 break;
1146 }
a0d0e21e 1147 return 0;
79072805
LW
1148}
1149
1150int
864dbfa3 1151Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1152{
8772537c 1153 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 1154
7918f24d
NC
1155 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1156
79072805 1157 if (uf && uf->uf_val)
24f81a43 1158 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1159 return 0;
1160}
1161
1162int
864dbfa3 1163Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1164{
27da23d5 1165 dVAR;
9ae3433d 1166 STRLEN len = 0, klen;
666ea192 1167 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1168 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1169 my_setenv(ptr, s);
1e422769 1170
7918f24d
NC
1171 PERL_ARGS_ASSERT_MAGIC_SETENV;
1172
a0d0e21e
LW
1173#ifdef DYNAMIC_ENV_FETCH
1174 /* We just undefd an environment var. Is a replacement */
1175 /* waiting in the wings? */
1176 if (!len) {
fabdb6c0
AL
1177 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1178 if (valp)
4ab59fcc 1179 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1180 }
1181#endif
1e422769 1182
39e571d4 1183#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1184 /* And you'll never guess what the dog had */
1185 /* in its mouth... */
3280af22 1186 if (PL_tainting) {
1e422769
PP
1187 MgTAINTEDDIR_off(mg);
1188#ifdef VMS
5aabfad6 1189 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1190 char pathbuf[256], eltbuf[256], *cp, *elt;
1e422769
PP
1191 int i = 0, j = 0;
1192
6fca0082 1193 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1194 elt = eltbuf;
1e422769
PP
1195 do { /* DCL$PATH may be a search list */
1196 while (1) { /* as may dev portion of any element */
1197 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1198 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1199 cando_by_name(S_IWUSR,0,elt) ) {
1200 MgTAINTEDDIR_on(mg);
1201 return 0;
1202 }
1203 }
bd61b366 1204 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1205 *cp = '\0';
1206 if (my_trnlnm(elt, eltbuf, j++))
1207 elt = eltbuf;
1208 else
1209 break;
1210 }
1211 j = 0;
1212 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1213 }
1214#endif /* VMS */
5aabfad6 1215 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1216 const char * const strend = s + len;
463ee0b2
LW
1217
1218 while (s < strend) {
96827780 1219 char tmpbuf[256];
c623ac67 1220 Stat_t st;
5f74f29c 1221 I32 i;
f5a63d97
AL
1222#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1223 const char path_sep = '|';
1224#else
1225 const char path_sep = ':';
1226#endif
96827780 1227 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1228 s, strend, path_sep, &i);
463ee0b2 1229 s++;
bb7a0f54 1230 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1231#ifdef VMS
1232 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1233#else
1234 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1235#endif
c6ed36e1 1236 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1237 MgTAINTEDDIR_on(mg);
1e422769
PP
1238 return 0;
1239 }
463ee0b2 1240 }
79072805
LW
1241 }
1242 }
39e571d4 1243#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1244
79072805
LW
1245 return 0;
1246}
1247
1248int
864dbfa3 1249Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1250{
7918f24d 1251 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
8772537c 1252 PERL_UNUSED_ARG(sv);
bd61b366 1253 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1254 return 0;
1255}
1256
88e89b8a 1257int
864dbfa3 1258Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1259{
97aff369 1260 dVAR;
7918f24d 1261 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
65e66c80 1262 PERL_UNUSED_ARG(mg);
b0269e46 1263#if defined(VMS)
cea2e8a9 1264 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1265#else
3280af22 1266 if (PL_localizing) {
fb73857a 1267 HE* entry;
b0269e46 1268 my_clearenv();
85fbaab2
NC
1269 hv_iterinit(MUTABLE_HV(sv));
1270 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
fb73857a
PP
1271 I32 keylen;
1272 my_setenv(hv_iterkey(entry, &keylen),
85fbaab2 1273 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
fb73857a
PP
1274 }
1275 }
1276#endif
1277 return 0;
1278}
1279
1280int
864dbfa3 1281Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1282{
27da23d5 1283 dVAR;
7918f24d 1284 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
8772537c
AL
1285 PERL_UNUSED_ARG(sv);
1286 PERL_UNUSED_ARG(mg);
b0269e46
AB
1287#if defined(VMS)
1288 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1289#else
1290 my_clearenv();
1291#endif
3e3baf6d 1292 return 0;
66b1d557
HM
1293}
1294
64ca3a65 1295#ifndef PERL_MICRO
2d4fcd5e
AJ
1296#ifdef HAS_SIGPROCMASK
1297static void
1298restore_sigmask(pTHX_ SV *save_sv)
1299{
0bd48802 1300 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1301 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1302}
1303#endif
66b1d557 1304int
864dbfa3 1305Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1306{
97aff369 1307 dVAR;
88e89b8a 1308 /* Are we fetching a signal entry? */
708854f2 1309 int i = (I16)mg->mg_private;
7918f24d
NC
1310
1311 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1312
708854f2 1313 if (!i) {
84c7b88c
BF
1314 STRLEN siglen;
1315 const char * sig = MgPV_const(mg, siglen);
1316 mg->mg_private = i = whichsig_pvn(sig, siglen);
708854f2
NC
1317 }
1318
e02bfb16 1319 if (i > 0) {
22c35a8c
GS
1320 if(PL_psig_ptr[i])
1321 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1322 else {
46da273f 1323 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1324#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1325 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1326 sigstate = SIG_IGN;
2e34cc90
CL
1327#endif
1328#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1329 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1330 sigstate = SIG_DFL;
85b332e2 1331#endif
88e89b8a 1332 /* cache state so we don't fetch it again */
8aad04aa 1333 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1334 sv_setpvs(sv,"IGNORE");
88e89b8a 1335 else
3280af22 1336 sv_setsv(sv,&PL_sv_undef);
46da273f 1337 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1338 SvTEMP_off(sv);
1339 }
1340 }
1341 return 0;
1342}
1343int
864dbfa3 1344Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1345{
7918f24d 1346 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
179c85a2 1347
38a124f0 1348 magic_setsig(NULL, mg);
179c85a2 1349 return sv_unmagic(sv, mg->mg_type);
88e89b8a 1350}
3d37d572 1351
0a8e0eff 1352Signal_t
8aad04aa 1353#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1354Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 1355#else
0a8e0eff 1356Perl_csighandler(int sig)
8aad04aa 1357#endif
0a8e0eff 1358{
1018e26f
NIS
1359#ifdef PERL_GET_SIG_CONTEXT
1360 dTHXa(PERL_GET_SIG_CONTEXT);
1361#else
85b332e2
CL
1362 dTHX;
1363#endif
23ada85b 1364#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1365 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1366 if (PL_sig_ignoring[sig]) return;
85b332e2 1367#endif
2e34cc90 1368#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1369 if (PL_sig_defaulting[sig])
2e34cc90
CL
1370#ifdef KILL_BY_SIGPRC
1371 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1372#else
1373 exit(1);
1374#endif
1375#endif
406878dd 1376 if (
853d2c32
RGS
1377#ifdef SIGILL
1378 sig == SIGILL ||
1379#endif
1380#ifdef SIGBUS
1381 sig == SIGBUS ||
1382#endif
1383#ifdef SIGSEGV
1384 sig == SIGSEGV ||
1385#endif
1386 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3 1387 /* Call the perl level handler now--
31c91b43 1388 * with risk we may be in malloc() or being destructed etc. */
6e324d09 1389#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1390 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1391#else
1392 (*PL_sighandlerp)(sig);
92807b6d 1393#endif
406878dd 1394 else {
31c91b43 1395 if (!PL_psig_pend) return;
406878dd
GA
1396 /* Set a flag to say this signal is pending, that is awaiting delivery after
1397 * the current Perl opcode completes */
1398 PL_psig_pend[sig]++;
1399
1400#ifndef SIG_PENDING_DIE_COUNT
1401# define SIG_PENDING_DIE_COUNT 120
1402#endif
fe13d51d 1403 /* Add one to say _a_ signal is pending */
406878dd
GA
1404 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1405 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1406 (unsigned long)SIG_PENDING_DIE_COUNT);
1407 }
0a8e0eff
NIS
1408}
1409
2e34cc90
CL
1410#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1411void
1412Perl_csighandler_init(void)
1413{
1414 int sig;
27da23d5 1415 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1416
1417 for (sig = 1; sig < SIG_SIZE; sig++) {
1418#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1419 dTHX;
27da23d5 1420 PL_sig_defaulting[sig] = 1;
5c1546dc 1421 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1422#endif
1423#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1424 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1425#endif
1426 }
27da23d5 1427 PL_sig_handlers_initted = 1;
2e34cc90
CL
1428}
1429#endif
1430
7fe50b8b
LT
1431#if defined HAS_SIGPROCMASK
1432static void
1433unblock_sigmask(pTHX_ void* newset)
1434{
1435 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1436}
1437#endif
1438
0a8e0eff
NIS
1439void
1440Perl_despatch_signals(pTHX)
1441{
97aff369 1442 dVAR;
0a8e0eff
NIS
1443 int sig;
1444 PL_sig_pending = 0;
1445 for (sig = 1; sig < SIG_SIZE; sig++) {
1446 if (PL_psig_pend[sig]) {
d0166017 1447 dSAVE_ERRNO;
7fe50b8b 1448#ifdef HAS_SIGPROCMASK
55534442
LT
1449 /* From sigaction(2) (FreeBSD man page):
1450 * | Signal routines normally execute with the signal that
1451 * | caused their invocation blocked, but other signals may
1452 * | yet occur.
1453 * Emulation of this behavior (from within Perl) is enabled
1454 * using sigprocmask
1455 */
1456 int was_blocked;
1457 sigset_t newset, oldset;
1458
1459 sigemptyset(&newset);
1460 sigaddset(&newset, sig);
1461 sigprocmask(SIG_BLOCK, &newset, &oldset);
1462 was_blocked = sigismember(&oldset, sig);
7fe50b8b
LT
1463 if (!was_blocked) {
1464 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1465 ENTER;
1466 SAVEFREESV(save_sv);
1467 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1468 }
55534442 1469#endif
25da4428 1470 PL_psig_pend[sig] = 0;
6e324d09 1471#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1472 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1473#else
1474 (*PL_sighandlerp)(sig);
92807b6d 1475#endif
7fe50b8b 1476#ifdef HAS_SIGPROCMASK
55534442 1477 if (!was_blocked)
7fe50b8b 1478 LEAVE;
55534442 1479#endif
d0166017 1480 RESTORE_ERRNO;
0a8e0eff
NIS
1481 }
1482 }
1483}
1484
38a124f0 1485/* sv of NULL signifies that we're acting as magic_clearsig. */
85e6fe83 1486int
864dbfa3 1487Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1488{
27da23d5 1489 dVAR;
79072805 1490 I32 i;
cbbf8932 1491 SV** svp = NULL;
2d4fcd5e
AJ
1492 /* Need to be careful with SvREFCNT_dec(), because that can have side
1493 * effects (due to closures). We must make sure that the new disposition
1494 * is in place before it is called.
1495 */
cbbf8932 1496 SV* to_dec = NULL;
e72dc28c 1497 STRLEN len;
2d4fcd5e
AJ
1498#ifdef HAS_SIGPROCMASK
1499 sigset_t set, save;
1500 SV* save_sv;
1501#endif
d5263905 1502 register const char *s = MgPV_const(mg,len);
7918f24d
NC
1503
1504 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1505
748a9306 1506 if (*s == '_') {
84c7b88c 1507 if (memEQs(s, len, "__DIE__"))
3280af22 1508 svp = &PL_diehook;
84c7b88c 1509 else if (memEQs(s, len, "__WARN__")
38a124f0
NC
1510 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1511 /* Merge the existing behaviours, which are as follows:
1512 magic_setsig, we always set svp to &PL_warnhook
1513 (hence we always change the warnings handler)
1514 For magic_clearsig, we don't change the warnings handler if it's
1515 set to the &PL_warnhook. */
3280af22 1516 svp = &PL_warnhook;
84c7b88c
BF
1517 } else if (sv) {
1518 SV *tmp = sv_newmortal();
1519 Perl_croak(aTHX_ "No such hook: %s",
1520 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1521 }
748a9306 1522 i = 0;
38a124f0 1523 if (svp && *svp) {
9289f461
RGS
1524 if (*svp != PERL_WARNHOOK_FATAL)
1525 to_dec = *svp;
cbbf8932 1526 *svp = NULL;
4633a7c4 1527 }
748a9306
LW
1528 }
1529 else {
708854f2
NC
1530 i = (I16)mg->mg_private;
1531 if (!i) {
84c7b88c 1532 i = whichsig_pvn(s, len); /* ...no, a brick */
58a26b12 1533 mg->mg_private = (U16)i;
708854f2 1534 }
86d86cad 1535 if (i <= 0) {
84c7b88c
BF
1536 if (sv) {
1537 SV *tmp = sv_newmortal();
1538 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1539 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1540 }
748a9306
LW
1541 return 0;
1542 }
2d4fcd5e
AJ
1543#ifdef HAS_SIGPROCMASK
1544 /* Avoid having the signal arrive at a bad time, if possible. */
1545 sigemptyset(&set);
1546 sigaddset(&set,i);
1547 sigprocmask(SIG_BLOCK, &set, &save);
1548 ENTER;
9ff8e806 1549 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ
1550 SAVEFREESV(save_sv);
1551 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1552#endif
1553 PERL_ASYNC_CHECK();
2e34cc90 1554#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1555 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1556#endif
23ada85b 1557#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1558 PL_sig_ignoring[i] = 0;
85b332e2 1559#endif
2e34cc90 1560#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1561 PL_sig_defaulting[i] = 0;
2e34cc90 1562#endif
2d4fcd5e 1563 to_dec = PL_psig_ptr[i];
38a124f0
NC
1564 if (sv) {
1565 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1566 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
79fd3822
NC
1567
1568 /* Signals don't change name during the program's execution, so once
1569 they're cached in the appropriate slot of PL_psig_name, they can
1570 stay there.
1571
1572 Ideally we'd find some way of making SVs at (C) compile time, or
1573 at least, doing most of the work. */
1574 if (!PL_psig_name[i]) {
1575 PL_psig_name[i] = newSVpvn(s, len);
1576 SvREADONLY_on(PL_psig_name[i]);
1577 }
38a124f0 1578 } else {
79fd3822 1579 SvREFCNT_dec(PL_psig_name[i]);
38a124f0
NC
1580 PL_psig_name[i] = NULL;
1581 PL_psig_ptr[i] = NULL;
1582 }
748a9306 1583 }
38a124f0 1584 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
2d4fcd5e 1585 if (i) {
5c1546dc 1586 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1587 }
748a9306 1588 else
b37c2d43 1589 *svp = SvREFCNT_inc_simple_NN(sv);
38a124f0 1590 } else {
9dfa190b
NC
1591 if (sv && SvOK(sv)) {
1592 s = SvPV_force(sv, len);
1593 } else {
1594 sv = NULL;
1595 }
84c7b88c 1596 if (sv && memEQs(s, len,"IGNORE")) {
9dfa190b 1597 if (i) {
23ada85b 1598#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
9dfa190b
NC
1599 PL_sig_ignoring[i] = 1;
1600 (void)rsignal(i, PL_csighandlerp);
85b332e2 1601#else
9dfa190b 1602 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1603#endif
9dfa190b 1604 }
2d4fcd5e 1605 }
84c7b88c 1606 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
9dfa190b 1607 if (i) {
2e34cc90 1608#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
9dfa190b
NC
1609 PL_sig_defaulting[i] = 1;
1610 (void)rsignal(i, PL_csighandlerp);
2e34cc90 1611#else
9dfa190b 1612 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1613#endif
9dfa190b
NC
1614 }
1615 }
1616 else {
1617 /*
1618 * We should warn if HINT_STRICT_REFS, but without
1619 * access to a known hint bit in a known OP, we can't
1620 * tell whether HINT_STRICT_REFS is in force or not.
1621 */
1622 if (!strchr(s,':') && !strchr(s,'\''))
1623 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1624 SV_GMAGIC);
1625 if (i)
1626 (void)rsignal(i, PL_csighandlerp);
1627 else
1628 *svp = SvREFCNT_inc_simple_NN(sv);
136e0459 1629 }
748a9306 1630 }
9dfa190b 1631
2d4fcd5e
AJ
1632#ifdef HAS_SIGPROCMASK
1633 if(i)
1634 LEAVE;
1635#endif
ef8d46e8 1636 SvREFCNT_dec(to_dec);
79072805
LW
1637 return 0;
1638}
64ca3a65 1639#endif /* !PERL_MICRO */
79072805
LW
1640
1641int
864dbfa3 1642Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1643{
97aff369 1644 dVAR;
7918f24d 1645 PERL_ARGS_ASSERT_MAGIC_SETISA;
8772537c 1646 PERL_UNUSED_ARG(sv);
e1a479c5 1647
89c14e2e 1648 /* Skip _isaelem because _isa will handle it shortly */
354b0578 1649 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
89c14e2e
BB
1650 return 0;
1651
0e446081 1652 return magic_clearisa(NULL, mg);
463ee0b2
LW
1653}
1654
0e446081 1655/* sv of NULL signifies that we're acting as magic_setisa. */
463ee0b2 1656int
52b45067
RD
1657Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1658{
1659 dVAR;
1660 HV* stash;
1661
7918f24d
NC
1662 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1663
52b45067 1664 /* Bail out if destruction is going on */
627364f1 1665 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
52b45067 1666
0e446081
NC
1667 if (sv)
1668 av_clear(MUTABLE_AV(sv));
52b45067 1669
6624142a
FC
1670 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1671 /* This occurs with setisa_elem magic, which calls this
1672 same function. */
1673 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1674
1675 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1676 SV **svp = AvARRAY((AV *)mg->mg_obj);
1677 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1678 while (items--) {
1679 stash = GvSTASH((GV *)*svp++);
1680 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1681 }
1682
1683 return 0;
1684 }
1685
52b45067 1686 stash = GvSTASH(
6624142a 1687 (const GV *)mg->mg_obj
52b45067
RD
1688 );
1689
00169e2c
FC
1690 /* The stash may have been detached from the symbol table, so check its
1691 name before doing anything. */
1692 if (stash && HvENAME_get(stash))
5562fa71 1693 mro_isa_changed_in(stash);
52b45067
RD
1694
1695 return 0;
1696}
1697
1698int
864dbfa3 1699Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1700{
85fbaab2 1701 HV * const hv = MUTABLE_HV(LvTARG(sv));
6ff81951 1702 I32 i = 0;
7918f24d
NC
1703
1704 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
8772537c 1705 PERL_UNUSED_ARG(mg);
7719e241 1706
6ff81951 1707 if (hv) {
497b47a8 1708 (void) hv_iterinit(hv);
ad64d0ec 1709 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1b95d04f 1710 i = HvUSEDKEYS(hv);
497b47a8
JH
1711 else {
1712 while (hv_iternext(hv))
1713 i++;
1714 }
6ff81951
GS
1715 }
1716
1717 sv_setiv(sv, (IV)i);
1718 return 0;
1719}
1720
1721int
864dbfa3 1722Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1723{
7918f24d 1724 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
8772537c 1725 PERL_UNUSED_ARG(mg);
946ec16e 1726 if (LvTARG(sv)) {
85fbaab2 1727 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
946ec16e
PP
1728 }
1729 return 0;
ac27b0f5 1730}
946ec16e 1731
efaf3674
DM
1732/*
1733=for apidoc magic_methcall
1734
1735Invoke a magic method (like FETCH).
1736
2baee27b
FC
1737C<sv> and C<mg> are the tied thingy and the tie magic.
1738
1739C<meth> is the name of the method to call.
1740
1741C<argc> is the number of args (in addition to $self) to pass to the method.
1742
1743The C<flags> can be:
1744
1745 G_DISCARD invoke method with G_DISCARD flag and don't
1746 return a value
1747 G_UNDEF_FILL fill the stack with argc pointers to
1748 PL_sv_undef
1749
1750The arguments themselves are any values following the C<flags> argument.
efaf3674
DM
1751
1752Returns the SV (if any) returned by the method, or NULL on failure.
1753
1754
1755=cut
1756*/
1757
1758SV*
c7a0c747 1759Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
046b0c7d 1760 U32 argc, ...)
a0d0e21e 1761{
97aff369 1762 dVAR;
a0d0e21e 1763 dSP;
efaf3674 1764 SV* ret = NULL;
463ee0b2 1765
7918f24d
NC
1766 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1767
efaf3674 1768 ENTER;
d1d7a15d
NC
1769
1770 if (flags & G_WRITING_TO_STDERR) {
1771 SAVETMPS;
1772
1773 save_re_context();
1774 SAVESPTR(PL_stderrgv);
1775 PL_stderrgv = NULL;
1776 }
1777
efaf3674 1778 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1779 PUSHMARK(SP);
efaf3674 1780
67549bd2
NC
1781 EXTEND(SP, argc+1);
1782 PUSHs(SvTIED_obj(sv, mg));
1783 if (flags & G_UNDEF_FILL) {
1784 while (argc--) {
efaf3674 1785 PUSHs(&PL_sv_undef);
93965878 1786 }
67549bd2 1787 } else if (argc > 0) {
046b0c7d
NC
1788 va_list args;
1789 va_start(args, argc);
1790
1791 do {
1792 SV *const sv = va_arg(args, SV *);
1793 PUSHs(sv);
1794 } while (--argc);
1795
1796 va_end(args);
88e89b8a 1797 }
463ee0b2 1798 PUTBACK;
efaf3674
DM
1799 if (flags & G_DISCARD) {
1800 call_method(meth, G_SCALAR|G_DISCARD);
1801 }
1802 else {
1803 if (call_method(meth, G_SCALAR))
1804 ret = *PL_stack_sp--;
1805 }
1806 POPSTACK;
d1d7a15d
NC
1807 if (flags & G_WRITING_TO_STDERR)
1808 FREETMPS;
efaf3674
DM
1809 LEAVE;
1810 return ret;
1811}
1812
1813
1814/* wrapper for magic_methcall that creates the first arg */
463ee0b2 1815
efaf3674 1816STATIC SV*
c7a0c747 1817S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
efaf3674
DM
1818 int n, SV *val)
1819{
1820 dVAR;
1821 SV* arg1 = NULL;
1822
1823 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1824
1825 if (mg->mg_ptr) {
1826 if (mg->mg_len >= 0) {
db4b3a1d 1827 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
efaf3674
DM
1828 }
1829 else if (mg->mg_len == HEf_SVKEY)
1830 arg1 = MUTABLE_SV(mg->mg_ptr);
1831 }
1832 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
db4b3a1d 1833 arg1 = newSViv((IV)(mg->mg_len));
efaf3674
DM
1834 sv_2mortal(arg1);
1835 }
1836 if (!arg1) {
046b0c7d 1837 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
efaf3674 1838 }
046b0c7d 1839 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
946ec16e
PP
1840}
1841
76e3520e 1842STATIC int
e1ec3a88 1843S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1844{
efaf3674
DM
1845 dVAR;
1846 SV* ret;
463ee0b2 1847
7918f24d
NC
1848 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1849
efaf3674
DM
1850 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1851 if (ret)
1852 sv_setsv(sv, ret);
a0d0e21e
LW
1853 return 0;
1854}
463ee0b2 1855
a0d0e21e 1856int
864dbfa3 1857Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1858{
7918f24d
NC
1859 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1860
fd69380d 1861 if (mg->mg_type == PERL_MAGIC_tiedelem)
a0d0e21e 1862 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1863 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1864 return 0;
1865}
1866
1867int
864dbfa3 1868Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1869{
efaf3674 1870 dVAR;
b112cff9
DM
1871 MAGIC *tmg;
1872 SV *val;
7918f24d
NC
1873
1874 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1875
b112cff9
DM
1876 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1877 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1878 * public flags indicate its value based on copying from $val. Doing
1879 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1880 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1881 * wrong if $val happened to be tainted, as sv hasn't got magic
1882 * enabled, even though taint magic is in the chain. In which case,
1883 * fake up a temporary tainted value (this is easier than temporarily
1884 * re-enabling magic on sv). */
1885
1886 if (PL_tainting && (tmg = mg_find(sv, PERL_MAGIC_taint))
1887 && (tmg->mg_len & 1))
1888 {
1889 val = sv_mortalcopy(sv);
1890 SvTAINTED_on(val);
1891 }
1892 else
1893 val = sv;
1894
efaf3674 1895 magic_methcall1(sv, mg, "STORE", G_DISCARD, 2, val);
463ee0b2
LW
1896 return 0;
1897}
1898
1899int
864dbfa3 1900Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1901{
7918f24d
NC
1902 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1903
4c13be3f 1904 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
a0d0e21e
LW
1905 return magic_methpack(sv,mg,"DELETE");
1906}
463ee0b2 1907
93965878
NIS
1908
1909U32
864dbfa3 1910Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1911{
efaf3674 1912 dVAR;
22846ab4 1913 I32 retval = 0;
efaf3674 1914 SV* retsv;
93965878 1915
7918f24d
NC
1916 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1917
efaf3674
DM
1918 retsv = magic_methcall1(sv, mg, "FETCHSIZE", 0, 1, NULL);
1919 if (retsv) {
1920 retval = SvIV(retsv)-1;
22846ab4
AB
1921 if (retval < -1)
1922 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1923 }
22846ab4 1924 return (U32) retval;
93965878
NIS
1925}
1926
cea2e8a9
GS
1927int
1928Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1929{
efaf3674 1930 dVAR;
463ee0b2 1931
7918f24d
NC
1932 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1933
046b0c7d 1934 Perl_magic_methcall(aTHX_ sv, mg, "CLEAR", G_DISCARD, 0);
463ee0b2
LW
1935 return 0;
1936}
1937
1938int
864dbfa3 1939Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1940{
efaf3674
DM
1941 dVAR;
1942 SV* ret;
463ee0b2 1943
7918f24d
NC
1944 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1945
046b0c7d
NC
1946 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, "NEXTKEY", 0, 1, key)
1947 : Perl_magic_methcall(aTHX_ sv, mg, "FIRSTKEY", 0, 0);
efaf3674
DM
1948 if (ret)
1949 sv_setsv(key,ret);
79072805
LW
1950 return 0;
1951}
1952
1953int
1146e912 1954Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e 1955{
7918f24d
NC
1956 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1957
a0d0e21e 1958 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1959}
a0d0e21e 1960
a3bcc51e
TP
1961SV *
1962Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1963{
efaf3674 1964 dVAR;
5fcbf73d 1965 SV *retval;
ad64d0ec
NC
1966 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1967 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
a3bcc51e 1968
7918f24d
NC
1969 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1970
a3bcc51e
TP
1971 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1972 SV *key;
bfcb3514 1973 if (HvEITER_get(hv))
a3bcc51e
TP
1974 /* we are in an iteration so the hash cannot be empty */
1975 return &PL_sv_yes;
1976 /* no xhv_eiter so now use FIRSTKEY */
1977 key = sv_newmortal();
ad64d0ec 1978 magic_nextpack(MUTABLE_SV(hv), mg, key);
bfcb3514 1979 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1980 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1981 }
1982
1983 /* there is a SCALAR method that we can call */
046b0c7d 1984 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, "SCALAR", 0, 0);
efaf3674 1985 if (!retval)
5fcbf73d 1986 retval = &PL_sv_undef;
a3bcc51e
TP
1987 return retval;
1988}
1989
a0d0e21e 1990int
864dbfa3 1991Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1992{
97aff369 1993 dVAR;
8772537c
AL
1994 GV * const gv = PL_DBline;
1995 const I32 i = SvTRUE(sv);
1996 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1997 atoi(MgPV_nolen_const(mg)), FALSE);
7918f24d
NC
1998
1999 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
2000
8772537c
AL
2001 if (svp && SvIOKp(*svp)) {
2002 OP * const o = INT2PTR(OP*,SvIVX(*svp));
2003 if (o) {
2004 /* set or clear breakpoint in the relevant control op */
2005 if (i)
2006 o->op_flags |= OPf_SPECIAL;
2007 else
2008 o->op_flags &= ~OPf_SPECIAL;
2009 }
5df8de69 2010 }
79072805
LW
2011 return 0;
2012}
2013
2014int
8772537c 2015Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 2016{
97aff369 2017 dVAR;
502c6561 2018 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC
2019
2020 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2021
83bf042f 2022 if (obj) {
e1dccc0d 2023 sv_setiv(sv, AvFILL(obj));
83bf042f
NC
2024 } else {
2025 SvOK_off(sv);
2026 }
79072805
LW
2027 return 0;
2028}
2029
2030int
864dbfa3 2031Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 2032{
97aff369 2033 dVAR;
502c6561 2034 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC
2035
2036 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2037
83bf042f 2038 if (obj) {
e1dccc0d 2039 av_fill(obj, SvIV(sv));
83bf042f 2040 } else {
a2a5de95
NC
2041 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2042 "Attempt to set length of freed array");
83bf042f
NC
2043 }
2044 return 0;
2045}
2046
2047int
83f29afa
VP
2048Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2049{
2050 dVAR;
2051
2052 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2053 PERL_UNUSED_ARG(sv);
2054
2055 /* Reset the iterator when the array is cleared */
3565fbf3
VP
2056#if IVSIZE == I32SIZE
2057 *((IV *) &(mg->mg_len)) = 0;
2058#else
83f29afa
VP
2059 if (mg->mg_ptr)
2060 *((IV *) mg->mg_ptr) = 0;
3565fbf3 2061#endif
83f29afa
VP
2062
2063 return 0;
2064}
2065
2066int
83bf042f
NC
2067Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2068{
97aff369 2069 dVAR;
7918f24d
NC
2070
2071 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 2072 PERL_UNUSED_ARG(sv);
7918f24d 2073
94f3782b
DM
2074 /* during global destruction, mg_obj may already have been freed */
2075 if (PL_in_clean_all)
1ea47f64 2076 return 0;
94f3782b 2077
83bf042f
NC
2078 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2079
2080 if (mg) {
2081 /* arylen scalar holds a pointer back to the array, but doesn't own a
2082 reference. Hence the we (the array) are about to go away with it
2083 still pointing at us. Clear its pointer, else it would be pointing
2084 at free memory. See the comment in sv_magic about reference loops,
2085 and why it can't own a reference to us. */
2086 mg->mg_obj = 0;
2087 }
a0d0e21e
LW
2088 return 0;
2089}
2090
2091int
864dbfa3 2092Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2093{
97aff369 2094 dVAR;
16eb5365 2095 SV* const lsv = LvTARG(sv);
7918f24d
NC
2096
2097 PERL_ARGS_ASSERT_MAGIC_GETPOS;
16eb5365 2098 PERL_UNUSED_ARG(mg);
ac27b0f5 2099
a0d0e21e 2100 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
2101 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
2102 if (found && found->mg_len >= 0) {
2103 I32 i = found->mg_len;
7e2040f0 2104 if (DO_UTF8(lsv))
a0ed51b3 2105 sv_pos_b2u(lsv, &i);
e1dccc0d 2106 sv_setiv(sv, i);
a0d0e21e
LW
2107 return 0;
2108 }
2109 }
0c34ef67 2110 SvOK_off(sv);
a0d0e21e
LW
2111 return 0;
2112}
2113
2114int
864dbfa3 2115Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2116{
97aff369 2117 dVAR;
16eb5365 2118 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
2119 SSize_t pos;
2120 STRLEN len;
c00206c8 2121 STRLEN ulen = 0;
53d44271 2122 MAGIC* found;
a0d0e21e 2123
7918f24d 2124 PERL_ARGS_ASSERT_MAGIC_SETPOS;
16eb5365 2125 PERL_UNUSED_ARG(mg);
ac27b0f5 2126
a0d0e21e 2127 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
2128 found = mg_find(lsv, PERL_MAGIC_regex_global);
2129 else
2130 found = NULL;
2131 if (!found) {
a0d0e21e
LW
2132 if (!SvOK(sv))
2133 return 0;
d83f0a82
NC
2134#ifdef PERL_OLD_COPY_ON_WRITE
2135 if (SvIsCOW(lsv))
2136 sv_force_normal_flags(lsv, 0);
2137#endif
3881461a 2138 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 2139 NULL, 0);
a0d0e21e
LW
2140 }
2141 else if (!SvOK(sv)) {
3881461a 2142 found->mg_len = -1;
a0d0e21e
LW
2143 return 0;
2144 }
4bac9ae4 2145 len = SvPOK_nog(lsv) ? SvCUR(lsv) : sv_len(lsv);
a0d0e21e 2146
e1dccc0d 2147 pos = SvIV(sv);
a0ed51b3 2148
7e2040f0 2149 if (DO_UTF8(lsv)) {
a0ed51b3
LW
2150 ulen = sv_len_utf8(lsv);
2151 if (ulen)
2152 len = ulen;
a0ed51b3
LW
2153 }
2154
a0d0e21e
LW
2155 if (pos < 0) {
2156 pos += len;
2157 if (pos < 0)
2158 pos = 0;
2159 }
eb160463 2160 else if (pos > (SSize_t)len)
a0d0e21e 2161 pos = len;
a0ed51b3
LW
2162
2163 if (ulen) {
2164 I32 p = pos;
2165 sv_pos_u2b(lsv, &p, 0);
2166 pos = p;
2167 }
727405f8 2168
3881461a
AL
2169 found->mg_len = pos;
2170 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 2171
79072805
LW
2172 return 0;
2173}
2174
2175int
864dbfa3 2176Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
2177{
2178 STRLEN len;
35a4481c 2179 SV * const lsv = LvTARG(sv);
b83604b4 2180 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB
2181 STRLEN offs = LvTARGOFF(sv);
2182 STRLEN rem = LvTARGLEN(sv);
83f78d1a
FC
2183 const bool negoff = LvFLAGS(sv) & 1;
2184 const bool negrem = LvFLAGS(sv) & 2;
7918f24d
NC
2185
2186 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2187 PERL_UNUSED_ARG(mg);
6ff81951 2188
83f78d1a
FC
2189 if (!translate_substr_offsets(
2190 SvUTF8(lsv) ? sv_len_utf8(lsv) : len,
2191 negoff ? -(IV)offs : (IV)offs, !negoff,
2192 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2193 )) {
2194 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2195 sv_setsv_nomg(sv, &PL_sv_undef);
2196 return 0;
2197 }
2198
9aa983d2 2199 if (SvUTF8(lsv))
d931b1be 2200 offs = sv_pos_u2b_flags(lsv, offs, &rem, SV_CONST_RETURN);
1c900557 2201 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2202 if (SvUTF8(lsv))
2ef4b674 2203 SvUTF8_on(sv);
6ff81951
GS
2204 return 0;
2205}
2206
2207int
864dbfa3 2208Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2209{
97aff369 2210 dVAR;
83f78d1a 2211 STRLEN len, lsv_len, oldtarglen, newtarglen;
5fcbf73d 2212 const char * const tmps = SvPV_const(sv, len);
dd374669 2213 SV * const lsv = LvTARG(sv);
777f7c56
EB
2214 STRLEN lvoff = LvTARGOFF(sv);
2215 STRLEN lvlen = LvTARGLEN(sv);
83f78d1a
FC
2216 const bool negoff = LvFLAGS(sv) & 1;
2217 const bool neglen = LvFLAGS(sv) & 2;
7918f24d
NC
2218
2219 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2220 PERL_UNUSED_ARG(mg);
075a4a2b 2221
a74fb2cd
FC
2222 SvGETMAGIC(lsv);
2223 if (SvROK(lsv))
2224 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2225 "Attempt to use reference as lvalue in substr"
2226 );
83f78d1a
FC
2227 if (SvUTF8(lsv)) lsv_len = sv_len_utf8(lsv);
2228 else (void)SvPV_nomg(lsv,lsv_len);
2229 if (!translate_substr_offsets(
2230 lsv_len,
2231 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2232 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2233 ))
2234 Perl_croak(aTHX_ "substr outside of string");
2235 oldtarglen = lvlen;
1aa99e6b 2236 if (DO_UTF8(sv)) {
9aa983d2 2237 sv_utf8_upgrade(lsv);
d931b1be 2238 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
a74fb2cd 2239 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2240 newtarglen = sv_len_utf8(sv);
9aa983d2
JH
2241 SvUTF8_on(lsv);
2242 }
9bf12eaf 2243 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2244 const char *utf8;
d931b1be 2245 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
83f78d1a 2246 newtarglen = len;
5fcbf73d 2247 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
a74fb2cd 2248 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
5fcbf73d 2249 Safefree(utf8);
1aa99e6b 2250 }
b76f3ce2 2251 else {
a74fb2cd 2252 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2253 newtarglen = len;
b76f3ce2 2254 }
83f78d1a
FC
2255 if (!neglen) LvTARGLEN(sv) = newtarglen;
2256 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
b76f3ce2 2257
79072805
LW
2258 return 0;
2259}
2260
2261int
864dbfa3 2262Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2263{
97aff369 2264 dVAR;
7918f24d
NC
2265
2266 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2267 PERL_UNUSED_ARG(sv);
7918f24d 2268
27cc343c 2269 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2270 return 0;
2271}
2272
2273int
864dbfa3 2274Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2275{
97aff369 2276 dVAR;
7918f24d
NC
2277
2278 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2279 PERL_UNUSED_ARG(sv);
7918f24d 2280
b01e650a
DM
2281 /* update taint status */
2282 if (PL_tainted)
2283 mg->mg_len |= 1;
2284 else
2285 mg->mg_len &= ~1;
463ee0b2
LW
2286 return 0;
2287}
2288
2289int
864dbfa3 2290Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2291{
35a4481c 2292 SV * const lsv = LvTARG(sv);
7918f24d
NC
2293
2294 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2295 PERL_UNUSED_ARG(mg);
6ff81951 2296
6136c704
AL
2297 if (lsv)
2298 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2299 else
0c34ef67 2300 SvOK_off(sv);
6ff81951 2301
6ff81951
GS
2302 return 0;
2303}
2304
2305int
864dbfa3 2306Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2307{
7918f24d 2308 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2309 PERL_UNUSED_ARG(mg);
79072805
LW
2310 do_vecset(sv); /* XXX slurp this routine */
2311 return 0;
2312}
2313
2314int
1e6bda93
FC
2315Perl_magic_setvstring(pTHX_ SV *sv, MAGIC *mg)
2316{
2317 PERL_ARGS_ASSERT_MAGIC_SETVSTRING;
2318
2319 if (SvPOKp(sv)) {
2320 SV * const vecsv = sv_newmortal();
2321 scan_vstring(mg->mg_ptr, mg->mg_ptr + mg->mg_len, vecsv);
2322 if (sv_eq_flags(vecsv, sv, 0 /*nomg*/)) return 0;
2323 }
2324 return sv_unmagic(sv, mg->mg_type);
2325}
2326
2327int
864dbfa3 2328Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2329{
97aff369 2330 dVAR;
a0714e2c 2331 SV *targ = NULL;
7918f24d
NC
2332
2333 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2334
5f05dabc 2335 if (LvTARGLEN(sv)) {
68dc0745 2336 if (mg->mg_obj) {
8772537c 2337 SV * const ahv = LvTARG(sv);
85fbaab2 2338 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
6d822dc4
MS
2339 if (he)
2340 targ = HeVAL(he);
68dc0745
PP
2341 }
2342 else {
502c6561 2343 AV *const av = MUTABLE_AV(LvTARG(sv));
68dc0745
PP
2344 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2345 targ = AvARRAY(av)[LvTARGOFF(sv)];
2346 }
46da273f 2347 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2348 /* somebody else defined it for us */
2349 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2350 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2351 LvTARGLEN(sv) = 0;
2352 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2353 mg->mg_obj = NULL;
68dc0745
PP
2354 mg->mg_flags &= ~MGf_REFCOUNTED;
2355 }
5f05dabc 2356 }
71be2cbc
PP
2357 else
2358 targ = LvTARG(sv);
3280af22 2359 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2360 return 0;
2361}
2362
2363int
864dbfa3 2364Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2365{
7918f24d 2366 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2367 PERL_UNUSED_ARG(mg);
71be2cbc 2368 if (LvTARGLEN(sv))
68dc0745
PP
2369 vivify_defelem(sv);
2370 if (LvTARG(sv)) {
5f05dabc 2371 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2372 SvSETMAGIC(LvTARG(sv));
2373 }
5f05dabc
PP
2374 return 0;
2375}
2376
71be2cbc 2377void
864dbfa3 2378Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2379{
97aff369 2380 dVAR;
74e13ce4 2381 MAGIC *mg;
a0714e2c 2382 SV *value = NULL;
71be2cbc 2383
7918f24d
NC
2384 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2385
14befaf4 2386 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2387 return;
68dc0745 2388 if (mg->mg_obj) {
8772537c 2389 SV * const ahv = LvTARG(sv);
85fbaab2 2390 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS
2391 if (he)
2392 value = HeVAL(he);
3280af22 2393 if (!value || value == &PL_sv_undef)
be2597df 2394 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2395 }
68dc0745 2396 else {
502c6561 2397 AV *const av = MUTABLE_AV(LvTARG(sv));
5aabfad6 2398 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2399 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2400 else {
d4c19fe8 2401 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2402 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2403 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2404 }
2405 }
b37c2d43 2406 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2407 SvREFCNT_dec(LvTARG(sv));
2408 LvTARG(sv) = value;
71be2cbc 2409 LvTARGLEN(sv) = 0;
68dc0745 2410 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2411 mg->mg_obj = NULL;
68dc0745 2412 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2413}
2414
2415int
864dbfa3 2416Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2417{
7918f24d 2418 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
5648c0ae
DM
2419 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2420 return 0;
810b8aa5
GS
2421}
2422
2423int
864dbfa3 2424Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2425{
7918f24d 2426 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2427 PERL_UNUSED_CONTEXT;
0177730e 2428 PERL_UNUSED_ARG(sv);
565764a8 2429 mg->mg_len = -1;
93a17b20
LW
2430 return 0;
2431}
2432
2433int
864dbfa3 2434Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2435{
35a4481c 2436 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2437
7918f24d
NC
2438 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2439
79072805 2440 if (uf && uf->uf_set)
24f81a43 2441 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2442 return 0;
2443}
2444
c277df42 2445int
faf82a0b
AE
2446Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2447{
488344d2 2448 const char type = mg->mg_type;
7918f24d
NC
2449
2450 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2451
488344d2
NC
2452 if (type == PERL_MAGIC_qr) {
2453 } else if (type == PERL_MAGIC_bm) {
2454 SvTAIL_off(sv);
2455 SvVALID_off(sv);
2456 } else {
2457 assert(type == PERL_MAGIC_fm);
488344d2
NC
2458 }
2459 return sv_unmagic(sv, type);
faf82a0b
AE
2460}
2461
7a4c00b4 2462#ifdef USE_LOCALE_COLLATE
79072805 2463int
864dbfa3 2464Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2465{
7918f24d
NC
2466 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2467
bbce6d69 2468 /*
838b5b74 2469 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2470 * and vanished with a faint plop.
2471 */
96a5add6 2472 PERL_UNUSED_CONTEXT;
8772537c 2473 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2474 if (mg->mg_ptr) {
2475 Safefree(mg->mg_ptr);
2476 mg->mg_ptr = NULL;
565764a8 2477 mg->mg_len = -1;
7a4c00b4 2478 }
bbce6d69
PP
2479 return 0;
2480}
7a4c00b4 2481#endif /* USE_LOCALE_COLLATE */
bbce6d69 2482
7e8c5dac
HS
2483/* Just clear the UTF-8 cache data. */
2484int
2485Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2486{
7918f24d 2487 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2488 PERL_UNUSED_CONTEXT;
8772537c 2489 PERL_UNUSED_ARG(sv);
7e8c5dac 2490 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2491 mg->mg_ptr = NULL;
7e8c5dac
HS
2492 mg->mg_len = -1; /* The mg_len holds the len cache. */
2493 return 0;
2494}
2495
bbce6d69 2496int
864dbfa3 2497Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2498{
97aff369 2499 dVAR;
e1ec3a88 2500 register const char *s;
2fdbfb4d
AB
2501 register I32 paren;
2502 register const REGEXP * rx;
2503 const char * const remaining = mg->mg_ptr + 1;
79072805 2504 I32 i;
8990e307 2505 STRLEN len;
125b9982 2506 MAGIC *tmg;
2fdbfb4d 2507
7918f24d
NC
2508 PERL_ARGS_ASSERT_MAGIC_SET;
2509
79072805 2510 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2511 case '\015': /* $^MATCH */
2512 if (strEQ(remaining, "ATCH"))
2513 goto do_match;
2514 case '`': /* ${^PREMATCH} caught below */
2515 do_prematch:
f1b875a0 2516 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2517 goto setparen;
2518 case '\'': /* ${^POSTMATCH} caught below */
2519 do_postmatch:
f1b875a0 2520 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2521 goto setparen;
2522 case '&':
2523 do_match:
f1b875a0 2524 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2525 goto setparen;
2526 case '1': case '2': case '3': case '4':
2527 case '5': case '6': case '7': case '8': case '9':
104a8018 2528 paren = atoi(mg->mg_ptr);
2fdbfb4d 2529 setparen:
1e05feb3 2530 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9bad346 2531 setparen_got_rx:
2fdbfb4d 2532 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
1e05feb3 2533 } else {
2fdbfb4d
AB
2534 /* Croak with a READONLY error when a numbered match var is
2535 * set without a previous pattern match. Unless it's C<local $1>
2536 */
d9bad346 2537 croakparen:
2fdbfb4d 2538 if (!PL_localizing) {
6ad8f254 2539 Perl_croak_no_modify(aTHX);
2fdbfb4d
AB
2540 }
2541 }
9b9e0be4 2542 break;
748a9306 2543 case '\001': /* ^A */
3280af22 2544 sv_setsv(PL_bodytarget, sv);
64eff8b7
DM
2545 FmLINES(PL_bodytarget) = 0;
2546 if (SvPOK(PL_bodytarget)) {
2547 char *s = SvPVX(PL_bodytarget);
2548 while ( ((s = strchr(s, '\n'))) ) {
2549 FmLINES(PL_bodytarget)++;
2550 s++;
2551 }
2552 }
125b9982
NT
2553 /* mg_set() has temporarily made sv non-magical */
2554 if (PL_tainting) {
2555 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2556 SvTAINTED_on(PL_bodytarget);
2557 else
2558 SvTAINTED_off(PL_bodytarget);
2559 }
748a9306 2560 break;
49460fe6 2561 case '\003': /* ^C */
f2338a2e 2562 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS
2563 break;
2564
79072805 2565 case '\004': /* ^D */
b4ab917c 2566#ifdef DEBUGGING
b83604b4 2567 s = SvPV_nolen_const(sv);
ddcf8bc1 2568 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS
2569 if (DEBUG_x_TEST || DEBUG_B_TEST)
2570 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2571#else
38ab35f8 2572 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2573#endif
79072805 2574 break;
28f23441 2575 case '\005': /* ^E */
d0063567 2576 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2577#ifdef VMS
38ab35f8 2578 set_vaxc_errno(SvIV(sv));
e37778c2
NC
2579#else
2580# ifdef WIN32
d0063567 2581 SetLastError( SvIV(sv) );
e37778c2
NC
2582# else
2583# ifdef OS2
38ab35f8 2584 os2_setsyserrno(SvIV(sv));
e37778c2 2585# else
d0063567 2586 /* will anyone ever use this? */
38ab35f8 2587 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ
2588# endif
2589# endif
22fae026 2590#endif
d0063567
DK
2591 }
2592 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2593 SvREFCNT_dec(PL_encoding);
d0063567
DK
2594 if (SvOK(sv) || SvGMAGICAL(sv)) {
2595 PL_encoding = newSVsv(sv);
2596 }
2597 else {
a0714e2c 2598 PL_encoding = NULL;
d0063567
DK
2599 }
2600 }
2601 break;
79072805 2602 case '\006': /* ^F */
38ab35f8 2603 PL_maxsysfd = SvIV(sv);
79072805 2604 break;
a0d0e21e 2605 case '\010': /* ^H */
38ab35f8 2606 PL_hints = SvIV(sv);
a0d0e21e 2607 break;
9d116dd7 2608 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2609 Safefree(PL_inplace);
bd61b366 2610 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2611 break;
d9bad346
FC
2612 case '\016': /* ^N */
2613 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2614 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2615 goto croakparen;
28f23441 2616 case '\017': /* ^O */
ac27b0f5 2617 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2618 Safefree(PL_osname);
bd61b366 2619 PL_osname = NULL;
3511154c
DM
2620 if (SvOK(sv)) {
2621 TAINT_PROPER("assigning to $^O");
2e0de35c 2622 PL_osname = savesvpv(sv);
3511154c 2623 }
ac27b0f5
NIS
2624 }
2625 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2626 STRLEN len;
2627 const char *const start = SvPV(sv, len);
b54fc2b6 2628 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2629 SV *tmp;
8b850bd5
NC
2630
2631
2632 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2633 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC
2634
2635 /* Opening for input is more common than opening for output, so
2636 ensure that hints for input are sooner on linked list. */
59cd0e26 2637 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z
2638 SvUTF8(sv))
2639 : newSVpvs_flags("", SvUTF8(sv));
2640 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2641 mg_set(tmp);
8b850bd5 2642
f747ebd6
Z
2643 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2644 SvUTF8(sv));
2645 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2646 mg_set(tmp);
ac27b0f5 2647 }
28f23441 2648 break;
79072805 2649 case '\020': /* ^P */
2fdbfb4d
AB
2650 if (*remaining == '\0') { /* ^P */
2651 PL_perldb = SvIV(sv);
2652 if (PL_perldb && !PL_DBsingle)
2653 init_debugger();
2654 break;
2655 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2656 goto do_prematch;
2657 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2658 goto do_postmatch;
2659 }
9b9e0be4 2660 break;
79072805 2661 case '\024': /* ^T */
88e89b8a 2662#ifdef BIG_TIME
6b88bc9c 2663 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2664#else
38ab35f8 2665 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2666#endif
79072805 2667 break;
e07ea26a
NC
2668 case '\025': /* ^UTF8CACHE */
2669 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2670 PL_utf8cache = (signed char) sv_2iv(sv);
2671 }
2672 break;
fde18df1 2673 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2674 if (*(mg->mg_ptr+1) == '\0') {
2675 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2676 i = SvIV(sv);
ac27b0f5 2677 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2678 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2679 }
599cee73 2680 }
0a378802 2681 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2682 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
7e4f0450
FC
2683 if (!SvPOK(sv)) {
2684 PL_compiling.cop_warnings = pWARN_STD;
d775746e
GS
2685 break;
2686 }
f4fc7782 2687 {
b5477537 2688 STRLEN len, i;
d3a7d8c7 2689 int accumulate = 0 ;
f4fc7782 2690 int any_fatals = 0 ;
b83604b4 2691 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2692 for (i = 0 ; i < len ; ++i) {
2693 accumulate |= ptr[i] ;
2694 any_fatals |= (ptr[i] & 0xAA) ;
2695 }
4243c432
NC
2696 if (!accumulate) {
2697 if (!specialWARN(PL_compiling.cop_warnings))
2698 PerlMemShared_free(PL_compiling.cop_warnings);
2699 PL_compiling.cop_warnings = pWARN_NONE;
2700 }
72dc9ed5
NC
2701 /* Yuck. I can't see how to abstract this: */
2702 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2703 WARN_ALL) && !any_fatals) {
4243c432
NC
2704 if (!specialWARN(PL_compiling.cop_warnings))
2705 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2706 PL_compiling.cop_warnings = pWARN_ALL;
2707 PL_dowarn |= G_WARN_ONCE ;
727405f8 2708 }
d3a7d8c7 2709 else {
72dc9ed5
NC
2710 STRLEN len;
2711 const char *const p = SvPV_const(sv, len);
2712
2713 PL_compiling.cop_warnings
8ee4cf24 2714 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2715 p, len);
2716
d3a7d8c7
GS
2717 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2718 PL_dowarn |= G_WARN_ONCE ;
2719 }
f4fc7782 2720
d3a7d8c7 2721 }
4438c4b7 2722 }
971a9dd3 2723 }
79072805
LW
2724 break;
2725 case '.':
3280af22
NIS
2726 if (PL_localizing) {
2727 if (PL_localizing == 1)
7766f137 2728 SAVESPTR(PL_last_in_gv);
748a9306 2729 }
3280af22 2730 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2731 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2732 break;
2733 case '^':
acbe1b9d
FC
2734 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2735 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2736 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2737 break;
2738 case '~':
acbe1b9d
FC
2739 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2740 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2741 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2742 break;
2743 case '=':
acbe1b9d 2744 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2745 break;
2746 case '-':
acbe1b9d
FC
2747 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2748 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
099be4f1 2749 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2750 break;
2751 case '%':
acbe1b9d 2752 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2753 break;
2754 case '|':
4b65379b 2755 {
099be4f1 2756 IO * const io = GvIO(PL_defoutgv);
720f287d
AB
2757 if(!io)
2758 break;
38ab35f8 2759 if ((SvIV(sv)) == 0)
4b65379b
CS
2760 IoFLAGS(io) &= ~IOf_FLUSH;
2761 else {
2762 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2763 PerlIO *ofp = IoOFP(io);
2764 if (ofp)
2765 (void)PerlIO_flush(ofp);
2766 IoFLAGS(io) |= IOf_FLUSH;
2767 }
2768 }
79072805
LW
2769 }
2770 break;
79072805 2771 case '/':
3280af22 2772 SvREFCNT_dec(PL_rs);
8bfdd7d9 2773 PL_rs = newSVsv(sv);
79072805
LW
2774 break;
2775 case '\\':
ef8d46e8 2776 SvREFCNT_dec(PL_ors_sv);
6bc2995b 2777 if (SvOK(sv)) {
7889fe52 2778 PL_ors_sv = newSVsv(sv);
009c130f 2779 }
e3c19b7b 2780 else {
a0714e2c 2781 PL_ors_sv = NULL;
e3c19b7b 2782 }
79072805 2783 break;
7d69d4a6
FC
2784 case '[':
2785 if (SvIV(sv) != 0)
2786 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2787 break;
79072805 2788 case '?':
ff0cee69 2789#ifdef COMPLEX_STATUS
6b88bc9c 2790 if (PL_localizing == 2) {
41cb7b2b 2791 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
2792 PL_statusvalue = LvTARGOFF(sv);
2793 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2794 }
2795 else
2796#endif
2797#ifdef VMSISH_STATUS
2798 if (VMSISH_STATUS)
fb38d079 2799 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2800 else
2801#endif
38ab35f8 2802 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2803 break;
2804 case '!':
93189314
JH
2805 {
2806#ifdef VMS
2807# define PERL_VMS_BANG vaxc$errno
2808#else
2809# define PERL_VMS_BANG 0
2810#endif
91487cfc 2811 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2812 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2813 }
79072805
LW
2814 break;
2815 case '<':
985213f2
AB
2816 {
2817 const IV new_uid = SvIV(sv);
2818 PL_delaymagic_uid = new_uid;
3280af22
NIS
2819 if (PL_delaymagic) {
2820 PL_delaymagic |= DM_RUID;
79072805
LW
2821 break; /* don't do magic till later */
2822 }
2823#ifdef HAS_SETRUID
985213f2 2824 (void)setruid((Uid_t)new_uid);
79072805
LW
2825#else
2826#ifdef HAS_SETREUID
985213f2 2827 (void)setreuid((Uid_t)new_uid, (Uid_t)-1);
748a9306 2828#else
85e6fe83 2829#ifdef HAS_SETRESUID
985213f2 2830 (void)setresuid((Uid_t)new_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2831#else
985213f2 2832 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
75870ed3 2833#ifdef PERL_DARWIN
2834 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
985213f2 2835 if (new_uid != 0 && PerlProc_getuid() == 0)
75870ed3 2836 (void)PerlProc_setuid(0);
2837#endif
985213f2 2838 (void)PerlProc_setuid(new_uid);
75870ed3 2839 } else {
cea2e8a9 2840 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2841 }
79072805
LW
2842#endif
2843#endif
85e6fe83 2844#endif
79072805 2845 break;
985213f2 2846 }
79072805 2847 case '>':
985213f2
AB
2848 {
2849 const UV new_euid = SvIV(sv);
2850 PL_delaymagic_euid = new_euid;
3280af22
NIS
2851 if (PL_delaymagic) {
2852 PL_delaymagic |= DM_EUID;
79072805
LW
2853 break; /* don't do magic till later */
2854 }
2855#ifdef HAS_SETEUID
985213f2 2856 (void)seteuid((Uid_t)new_euid);
79072805
LW
2857#else
2858#ifdef HAS_SETREUID
985213f2 2859 (void)setreuid((Uid_t)-1, (Uid_t)new_euid);
85e6fe83
LW
2860#else
2861#ifdef HAS_SETRESUID
985213f2 2862 (void)setresuid((Uid_t)-1, (Uid_t)new_euid, (Uid_t)-1);
79072805 2863#else
985213f2 2864 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
382669a9 2865 PerlProc_setuid(new_euid);
a0d0e21e 2866 else {
cea2e8a9 2867 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2868 }
79072805
LW
2869#endif
2870#endif
85e6fe83 2871#endif
79072805 2872 break;
985213f2 2873 }
79072805 2874 case '(':
985213f2
AB
2875 {
2876 const UV new_gid = SvIV(sv);
2877 PL_delaymagic_gid = new_gid;
3280af22
NIS
2878 if (PL_delaymagic) {
2879 PL_delaymagic |= DM_RGID;
79072805
LW
2880 break; /* don't do magic till later */
2881 }
2882#ifdef HAS_SETRGID
985213f2 2883 (void)setrgid((Gid_t)new_gid);
79072805
LW
2884#else
2885#ifdef HAS_SETREGID
985213f2 2886 (void)setregid((Gid_t)new_gid, (Gid_t)-1);
85e6fe83
LW
2887#else
2888#ifdef HAS_SETRESGID
985213f2 2889 (void)setresgid((Gid_t)new_gid, (Gid_t)-1, (Gid_t) -1);
79072805 2890#else
985213f2
AB
2891 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2892 (void)PerlProc_setgid(new_gid);
748a9306 2893 else {
cea2e8a9 2894 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2895 }
79072805
LW
2896#endif
2897#endif
85e6fe83 2898#endif
79072805 2899 break;
985213f2 2900 }
79072805 2901 case ')':
985213f2
AB
2902 {
2903 UV new_egid;
5cd24f17
PP
2904#ifdef HAS_SETGROUPS
2905 {
b83604b4 2906 const char *p = SvPV_const(sv, len);
757f63d8 2907 Groups_t *gary = NULL;
fb4089e0 2908#ifdef _SC_NGROUPS_MAX
2909 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2910
2911 if (maxgrp < 0)
2912 maxgrp = NGROUPS;
2913#else
2914 int maxgrp = NGROUPS;
2915#endif
757f63d8
SP
2916
2917 while (isSPACE(*p))
2918 ++p;
985213f2 2919 new_egid = Atol(p);
fb4089e0 2920 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP
2921 while (*p && !isSPACE(*p))
2922 ++p;
2923 while (isSPACE(*p))
2924 ++p;
2925 if (!*p)
2926 break;
2927 if(!gary)
2928 Newx(gary, i + 1, Groups_t);
2929 else
2930 Renew(gary, i + 1, Groups_t);
2931 gary[i] = Atol(p);
2932 }
2933 if (i)
2934 (void)setgroups(i, gary);
f5a63d97 2935 Safefree(gary);
5cd24f17
PP
2936 }
2937#else /* HAS_SETGROUPS */
985213f2 2938 new_egid = SvIV(sv);
5cd24f17 2939#endif /* HAS_SETGROUPS */
985213f2 2940 PL_delaymagic_egid = new_egid;
3280af22
NIS
2941 if (PL_delaymagic) {
2942 PL_delaymagic |= DM_EGID;
79072805
LW
2943 break; /* don't do magic till later */
2944 }
2945#ifdef HAS_SETEGID
985213f2 2946 (void)setegid((Gid_t)new_egid);
79072805
LW
2947#else
2948#ifdef HAS_SETREGID
985213f2 2949 (void)setregid((Gid_t)-1, (Gid_t)new_egid);
85e6fe83
LW
2950#else
2951#ifdef HAS_SETRESGID
985213f2 2952 (void)setresgid((Gid_t)-1, (Gid_t)new_egid, (Gid_t)-1);
79072805 2953#else
985213f2
AB
2954 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2955 (void)PerlProc_setgid(new_egid);
748a9306 2956 else {
cea2e8a9 2957 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2958 }
79072805
LW
2959#endif
2960#endif
85e6fe83 2961#endif
79072805 2962 break;
985213f2 2963 }
79072805 2964 case ':':
2d8e6c8d 2965 PL_chopset = SvPV_force(sv,len);
79072805 2966 break;
9cdac2a2
FC
2967 case '$': /* $$ */
2968 /* Store the pid in mg->mg_obj so we can tell when a fork has
2969 occurred. mg->mg_obj points to *$ by default, so clear it. */
2970 if (isGV(mg->mg_obj)) {
2971 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2972 SvREFCNT_dec(mg->mg_obj);
2973 mg->mg_flags |= MGf_REFCOUNTED;
2974 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2975 }
2976 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2977 break;
79072805 2978 case '0':
e2975953 2979 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2980#ifdef HAS_SETPROCTITLE
2981 /* The BSDs don't show the argv[] in ps(1) output, they
2982 * show a string from the process struct and provide
2983 * the setproctitle() routine to manipulate that. */
a2722ac9 2984 if (PL_origalen != 1) {
b83604b4 2985 s = SvPV_const(sv, len);
98b76f99 2986# if __FreeBSD_version > 410001
9aad2c0e 2987 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2988 * but not the "(perl) suffix from the ps(1)
2989 * output, because that's what ps(1) shows if the
2990 * argv[] is modified. */
6f2ad931 2991 setproctitle("-%s", s);
9aad2c0e 2992# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2993 /* This doesn't really work if you assume that
2994 * $0 = 'foobar'; will wipe out 'perl' from the $0
2995 * because in ps(1) output the result will be like
2996 * sprintf("perl: %s (perl)", s)
2997 * I guess this is a security feature:
2998 * one (a user process) cannot get rid of the original name.
2999 * --jhi */
3000 setproctitle("%s", s);
3001# endif
3002 }
9d3968b2 3003#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 3004 if (PL_origalen != 1) {
17aa7f3d 3005 union pstun un;
b83604b4 3006 s = SvPV_const(sv, len);
6867be6d 3007 un.pst_command = (char *)s;
17aa7f3d
JH
3008 pstat(PSTAT_SETCMD, un, len, 0, 0);
3009 }
9d3968b2 3010#else
2d2af554
GA
3011 if (PL_origalen > 1) {
3012 /* PL_origalen is set in perl_parse(). */
3013 s = SvPV_force(sv,len);
3014 if (len >= (STRLEN)PL_origalen-1) {
3015 /* Longer than original, will be truncated. We assume that
3016 * PL_origalen bytes are available. */
3017 Copy(s, PL_origargv[0], PL_origalen-1, char);
3018 }
3019 else {
3020 /* Shorter than original, will be padded. */
235ac35d 3021#ifdef PERL_DARWIN
60777a0d
JH
3022 /* Special case for Mac OS X: see [perl #38868] */
3023 const int pad = 0;
235ac35d 3024#else
8a89a4f1
MB
3025 /* Is the space counterintuitive? Yes.
3026 * (You were expecting \0?)
3027 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3028 * --jhi */
60777a0d 3029 const int pad = ' ';
235ac35d 3030#endif
60777a0d
JH
3031 Copy(s, PL_origargv[0], len, char);
3032 PL_origargv[0][len] = 0;
3033 memset(PL_origargv[0] + len + 1,
3034 pad, PL_origalen - len - 1);
2d2af554
GA
3035 }
3036 PL_origargv[0][PL_origalen-1] = 0;
3037 for (i = 1; i < PL_origargc; i++)
3038 PL_origargv[i] = 0;
7636ea95
AB
3039#ifdef HAS_PRCTL_SET_NAME
3040 /* Set the legacy process name in addition to the POSIX name on Linux */
3041 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3042 /* diag_listed_as: SKIPME */
3043 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3044 }
3045#endif
79072805 3046 }
9d3968b2 3047#endif
e2975953 3048 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW
3049 break;
3050 }
3051 return 0;
3052}
3053
3054I32
84c7b88c
BF
3055Perl_whichsig_sv(pTHX_ SV *sigsv)
3056{
3057 const char *sigpv;
3058 STRLEN siglen;
3059 PERL_ARGS_ASSERT_WHICHSIG_SV;
3060 PERL_UNUSED_CONTEXT;
3061 sigpv = SvPV_const(sigsv, siglen);
3062 return whichsig_pvn(sigpv, siglen);
3063}
3064
3065I32
3066Perl_whichsig_pv(pTHX_ const char *sig)
3067{
3068 PERL_ARGS_ASSERT_WHICHSIG_PV;
3069 PERL_UNUSED_CONTEXT;
3070 return whichsig_pvn(sig, strlen(sig));
3071}
3072
3073I32
3074Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
79072805 3075{
aadb217d 3076 register char* const* sigv;
7918f24d 3077
84c7b88c 3078 PERL_ARGS_ASSERT_WHICHSIG_PVN;
96a5add6 3079 PERL_UNUSED_CONTEXT;
79072805 3080
aadb217d 3081 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
84c7b88c 3082 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
aadb217d 3083 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805 3084#ifdef SIGCLD
84c7b88c 3085 if (memEQs(sig, len, "CHLD"))
79072805
LW
3086 return SIGCLD;
3087#endif
3088#ifdef SIGCHLD
84c7b88c 3089 if (memEQs(sig, len, "CLD"))
79072805
LW
3090 return SIGCHLD;
3091#endif
7f1236c0 3092 return -1;
79072805
LW
3093}
3094
ecfc5424 3095Signal_t
1e82f5a6 3096#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3097Perl_sighandler(int sig, siginfo_t *sip, void *uap)
1e82f5a6
SH
3098#else
3099Perl_sighandler(int sig)
3100#endif
79072805 3101{
1018e26f
NIS
3102#ifdef PERL_GET_SIG_CONTEXT
3103 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 3104#else
cea2e8a9 3105 dTHX;
71d280e3 3106#endif
79072805 3107 dSP;
a0714e2c
SS
3108 GV *gv = NULL;
3109 SV *sv = NULL;
8772537c 3110 SV * const tSv = PL_Sv;
601f1833 3111 CV *cv = NULL;
533c011a 3112 OP *myop = PL_op;
84902520 3113 U32 flags = 0;
8772537c 3114 XPV * const tXpv = PL_Xpv;
0c4d3b5e 3115 I32 old_ss_ix = PL_savestack_ix;
100c03aa 3116 SV *errsv_save = NULL;
71d280e3 3117
84902520 3118
727405f8 3119 if (!PL_psig_ptr[sig]) {
99ef548b 3120 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
3121 PL_sig_name[sig]);
3122 exit(sig);
3123 }
ff0cee69 3124
a0d63a7b
DM
3125 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3126 /* Max number of items pushed there is 3*n or 4. We cannot fix
3127 infinity, so we fix 4 (in fact 5): */
3128 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3129 flags |= 1;
3130 PL_savestack_ix += 5; /* Protect save in progress. */
3131 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3132 }
84902520 3133 }
84902520 3134 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 3135 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL
3136 || SvTYPE(cv) != SVt_PVCV) {
3137 HV *st;
f2c0649b 3138 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 3139 }
84902520 3140
a0d0e21e 3141 if (!cv || !CvROOT(cv)) {
a2a5de95
NC
3142 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3143 PL_sig_name[sig], (gv ? GvENAME(gv)
3144 : ((cv && CvGV(cv))
3145 ? GvENAME(CvGV(cv))
3146 : "__ANON__")));
00d579c5 3147 goto cleanup;
79072805
LW
3148 }
3149
0c4d3b5e
DM
3150 sv = PL_psig_name[sig]
3151 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3152 : newSVpv(PL_sig_name[sig],0);
72048cfe 3153 flags |= 8;
0c4d3b5e
DM
3154 SAVEFREESV(sv);
3155
a0d63a7b
DM
3156 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3157 /* make sure our assumption about the size of the SAVEs are correct:
3158 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3159 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3160 }
e336de0d 3161
e788e7d3 3162 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 3163 PUSHMARK(SP);
79072805 3164 PUSHs(sv);
8aad04aa
JH
3165#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3166 {
3167 struct sigaction oact;
3168
3169 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH
3170 if (sip) {
3171 HV *sih = newHV();
ad64d0ec 3172 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH
3173 /* The siginfo fields signo, code, errno, pid, uid,
3174 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC
3175 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3176 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 3177#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. */
85771703
NC
3178 hv_stores(sih, "errno", newSViv(sip->si_errno));
3179 hv_stores(sih, "status", newSViv(sip->si_status));
3180 hv_stores(sih, "uid", newSViv(sip->si_uid));
3181 hv_stores(sih, "pid", newSViv(sip->si_pid));
3182 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3183 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 3184#endif
8aad04aa 3185 EXTEND(SP, 2);
ad64d0ec 3186 PUSHs(rv);
22f1178f 3187 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 3188 }
b4552a27 3189
8aad04aa
JH
3190 }
3191 }
3192#endif
79072805 3193 PUTBACK;
a0d0e21e 3194
100c03aa
JL
3195 errsv_save = newSVsv(ERRSV);
3196
ad64d0ec 3197 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 3198
d3acc0f7 3199 POPSTACK;
1b266415 3200 if (SvTRUE(ERRSV)) {
100c03aa 3201 SvREFCNT_dec(errsv_save);
c22d665b 3202#ifndef PERL_MICRO
1b266415
NIS
3203 /* Handler "died", for example to get out of a restart-able read().
3204 * Before we re-do that on its behalf re-enable the signal which was
3205 * blocked by the system when we entered.
3206 */
c22d665b 3207#ifdef HAS_SIGPROCMASK
d488af49 3208#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3209 if (sip || uap)
c22d665b
LT
3210#endif
3211 {
3212 sigset_t set;
3213 sigemptyset(&set);
3214 sigaddset(&set,sig);
3215 sigprocmask(SIG_UNBLOCK, &set, NULL);
3216 }
3217#else
1b266415
NIS
3218 /* Not clear if this will work */
3219 (void)rsignal(sig, SIG_IGN);
5c1546dc 3220 (void)rsignal(sig, PL_csighandlerp);
c22d665b
LT
3221#endif
3222#endif /* !PERL_MICRO */
c5df3096 3223 die_sv(ERRSV);
1b266415 3224 }
100c03aa
JL
3225 else {
3226 sv_setsv(ERRSV, errsv_save);
3227 SvREFCNT_dec(errsv_save);
3228 }
3229
00d579c5 3230cleanup:
0c4d3b5e
DM
3231 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3232 PL_savestack_ix = old_ss_ix;
72048cfe 3233 if (flags & 8)
84902520 3234 SvREFCNT_dec(sv);
533c011a 3235 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3236
3280af22
NIS
3237 PL_Sv = tSv; /* Restore global temporaries. */
3238 PL_Xpv = tXpv;
53bb94e2 3239 return;
79072805 3240}
4e35701f
NIS
3241
3242
51371543 3243static void
8772537c 3244S_restore_magic(pTHX_ const void *p)
51371543 3245{
97aff369 3246 dVAR;
8772537c
AL
3247 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3248 SV* const sv = mgs->mgs_sv;
150b625d 3249 bool bumped;
51371543
GS
3250
3251 if (!sv)
3252 return;
3253
4bac9ae4
CS
3254 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3255 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
f8c7b90f 3256#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
3257 /* While magic was saved (and off) sv_setsv may well have seen
3258 this SV as a prime candidate for COW. */
3259 if (SvIsCOW(sv))
e424a81e 3260 sv_force_normal_flags(sv, 0);
f9701176 3261#endif
f9c6fee5
CS
3262 if (mgs->mgs_readonly)
3263 SvREADONLY_on(sv);
3264 if (mgs->mgs_magical)
3265 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS
3266 else
3267 mg_magical(sv);
51371543
GS
3268 }
3269
150b625d 3270 bumped = mgs->mgs_bumped;
51371543
GS
3271 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3272
3273 /* If we're still on top of the stack, pop us off. (That condition
3274 * will be satisfied if restore_magic was called explicitly, but *not*
3275 * if it's being called via leave_scope.)
3276 * The reason for doing this is that otherwise, things like sv_2cv()
3277 * may leave alloc gunk on the savestack, and some code
3278 * (e.g. sighandler) doesn't expect that...
3279 */
3280 if (PL_savestack_ix == mgs->mgs_ss_ix)
3281 {
1be36ce0
NC
3282 UV popval = SSPOPUV;
3283 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3284 PL_savestack_ix -= 2;
1be36ce0
NC
3285 popval = SSPOPUV;
3286 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3287 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543 3288 }
150b625d
DM
3289 if (bumped) {
3290 if (SvREFCNT(sv) == 1) {
3291 /* We hold the last reference to this SV, which implies that the
3292 SV was deleted as a side effect of the routines we called.
3293 So artificially keep it alive a bit longer.
3294 We avoid turning on the TEMP flag, which can cause the SV's
3295 buffer to get stolen (and maybe other stuff). */
150b625d 3296 sv_2mortal(sv);
4bac9ae4 3297 SvTEMP_off(sv);
8985fe98 3298 }
150b625d
DM
3299 else
3300 SvREFCNT_dec(sv); /* undo the inc in S_save_magic() */
8985fe98 3301 }
51371543
GS
3302}
3303
0c4d3b5e
DM
3304/* clean up the mess created by Perl_sighandler().
3305 * Note that this is only called during an exit in a signal handler;
3306 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
9a7f166c 3307 * skipped over. */
0c4d3b5e 3308
51371543 3309static void
8772537c 3310S_unwind_handler_stack(pTHX_ const void *p)
51371543 3311{
27da23d5 3312 dVAR;
0c4d3b5e 3313 PERL_UNUSED_ARG(p);
7918f24d 3314
0c4d3b5e 3315 PL_savestack_ix -= 5; /* Unprotect save in progress. */
51371543 3316}
1018e26f 3317
66610fdd 3318/*
b3ca2e83
NC
3319=for apidoc magic_sethint
3320
3321Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3322C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3323anything that would need a deep copy. Maybe we should warn if we find a
3324reference.
b3ca2e83
NC
3325
3326=cut
3327*/
3328int
3329Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3330{
3331 dVAR;
ad64d0ec 3332 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
59cd0e26 3333 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
b3ca2e83 3334
7918f24d
NC
3335 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3336
e6e3e454
NC
3337 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3338 an alternative leaf in there, with PL_compiling.cop_hints being used if
3339 it's NULL. If needed for threads, the alternative could lock a mutex,
3340 or take other more complex action. */
3341
5b9c0671
NC
3342 /* Something changed in %^H, so it will need to be restored on scope exit.
3343 Doing this here saves a lot of doing it manually in perl code (and
3344 forgetting to do it, and consequent subtle errors. */
3345 PL_hints |= HINT_LOCALIZE_HH;
20439bc7
Z
3346 CopHINTHASH_set(&PL_compiling,
3347 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
b3ca2e83
NC
3348 return 0;
3349}
3350
3351/*
f175cff5 3352=for apidoc magic_clearhint
b3ca2e83 3353
c28fe1ec
NC
3354Triggered by a delete from %^H, records the key to
3355C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3356
3357=cut
3358*/
3359int
3360Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3361{
3362 dVAR;
7918f24d
NC
3363
3364 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
f5a63d97
AL
3365 PERL_UNUSED_ARG(sv);
3366
5b9c0671 3367 PL_hints |= HINT_LOCALIZE_HH;
20439bc7 3368 CopHINTHASH_set(&PL_compiling,
e3352591
FC
3369 mg->mg_len == HEf_SVKEY
3370 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3371 MUTABLE_SV(mg->mg_ptr), 0, 0)
3372 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3373 mg->mg_ptr, mg->mg_len, 0, 0));
b3ca2e83
NC
3374 return 0;
3375}
3376
3377/*
f747ebd6
Z
3378=for apidoc magic_clearhints
3379
3380Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3381
3382=cut
3383*/
3384int
3385Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3386{
3387 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3388 PERL_UNUSED_ARG(sv);
3389 PERL_UNUSED_ARG(mg);
20439bc7
Z
3390 cophh_free(CopHINTHASH_get(&PL_compiling));
3391 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
f747ebd6
Z
3392 return 0;
3393}
3394
09fb282d
FC
3395int
3396Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3397 const char *name, I32 namlen)
3398{
3399 MAGIC *nmg;
3400
3401 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
4f8dbb2d 3402 PERL_UNUSED_ARG(sv);
09fb282d
FC
3403 PERL_UNUSED_ARG(name);
3404 PERL_UNUSED_ARG(namlen);
3405
3406 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3407 nmg = mg_find(nsv, mg->mg_type);
3408 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3409 nmg->mg_ptr = mg->mg_ptr;
3410 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3411 nmg->mg_flags |= MGf_REFCOUNTED;
3412 return 1;
3413}
3414
f747ebd6 3415/*
66610fdd
RGS
3416 * Local variables:
3417 * c-indentation-style: bsd
3418 * c-basic-offset: 4
14d04a33 3419 * indent-tabs-mode: nil
66610fdd
RGS
3420 * End:
3421 *
14d04a33 3422 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3423 */