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Reset the iterator when an array is cleared
[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
79072805
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/*
79 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
80 */
81
82struct magic_state {
83 SV* mgs_sv;
455ece5e 84 I32 mgs_ss_ix;
f9c6fee5
CS		 85 U32 mgs_magical;
86 bool mgs_readonly;
150b625d 87 bool mgs_bumped;
c07a80fd 88};
455ece5e 89/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS		 90
91STATIC void
8fb26106 92S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 93{
97aff369 94 dVAR;
455ece5e 95 MGS* mgs;
150b625d 96 bool bumped = FALSE;
7918f24d
NC		 97
98 PERL_ARGS_ASSERT_SAVE_MAGIC;
99
150b625d
DM		 100 /* we shouldn't really be called here with RC==0, but it can sometimes
101 * happen via mg_clear() (which also shouldn't be called when RC==0,
102 * but it can happen). Handle this case gracefully(ish) by not RC++
103 * and thus avoiding the resultant double free */
104 if (SvREFCNT(sv) > 0) {
105 /* guard against sv getting freed midway through the mg clearing,
106 * by holding a private reference for the duration. */
107 SvREFCNT_inc_simple_void_NN(sv);
108 bumped = TRUE;
109 }
8985fe98 110
c07a80fd 111 assert(SvMAGICAL(sv));
d8b2590f
NC		 112 /* Turning READONLY off for a copy-on-write scalar (including shared
113 hash keys) is a bad idea. */
765f542d 114 if (SvIsCOW(sv))
9a265e59 115 sv_force_normal_flags(sv, 0);
c07a80fd 116
8772537c 117 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD		 118
119 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd 120 mgs->mgs_sv = sv;
f9c6fee5
CS		 121 mgs->mgs_magical = SvMAGICAL(sv);
122 mgs->mgs_readonly = SvREADONLY(sv) != 0;
455ece5e 123 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
150b625d 124 mgs->mgs_bumped = bumped;
c07a80fd 125
126 SvMAGICAL_off(sv);
127 SvREADONLY_off(sv);
085bde85
NC		 128 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
129 /* No public flags are set, so promote any private flags to public. */
130 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
131 }
c07a80fd 132}
133
954c1994
GS		 134/*
135=for apidoc mg_magical
136
137Turns on the magical status of an SV. See C<sv_magic>.
138
139=cut
140*/
141
8990e307 142void
864dbfa3 143Perl_mg_magical(pTHX_ SV *sv)
8990e307 144{
e1ec3a88 145 const MAGIC* mg;
7918f24d 146 PERL_ARGS_ASSERT_MG_MAGICAL;
96a5add6 147 PERL_UNUSED_CONTEXT;
f9c6fee5
CS		 148
149 SvMAGICAL_off(sv);
218787bd 150 if ((mg = SvMAGIC(sv))) {
218787bd
VP		 151 do {
152 const MGVTBL* const vtbl = mg->mg_virtual;
153 if (vtbl) {
154 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
155 SvGMAGICAL_on(sv);
156 if (vtbl->svt_set)
157 SvSMAGICAL_on(sv);
158 if (vtbl->svt_clear)
159 SvRMAGICAL_on(sv);
160 }
161 } while ((mg = mg->mg_moremagic));
162 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
163 SvRMAGICAL_on(sv);
8990e307
LW		 164 }
165}
166
954c1994
GS		 167/*
168=for apidoc mg_get
169
170Do magic after a value is retrieved from the SV. See C<sv_magic>.
171
172=cut
173*/
174
79072805 175int
864dbfa3 176Perl_mg_get(pTHX_ SV *sv)
79072805 177{
97aff369 178 dVAR;
35a4481c 179 const I32 mgs_ix = SSNEW(sizeof(MGS));
f9c6fee5 180 bool have_new = 0;
ff76feab 181 MAGIC *newmg, *head, *cur, *mg;
6683b158 182
7918f24d
NC		 183 PERL_ARGS_ASSERT_MG_GET;
184
407287f9
FC		 185 if (PL_localizing == 1 && sv == DEFSV) return 0;
186
455ece5e 187 save_magic(mgs_ix, sv);
463ee0b2 188
ff76feab
AMS		 189 /* We must call svt_get(sv, mg) for each valid entry in the linked
190 list of magic. svt_get() may delete the current entry, add new
191 magic to the head of the list, or upgrade the SV. AMS 20010810 */
192
193 newmg = cur = head = mg = SvMAGIC(sv);
194 while (mg) {
35a4481c 195 const MGVTBL * const vtbl = mg->mg_virtual;
f9c6fee5 196 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
ff76feab 197
2b260de0 198 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
16c91539 199 vtbl->svt_get(aTHX_ sv, mg);
b77f7d40 200
58f82c5c
DM		 201 /* guard against magic having been deleted - eg FETCH calling
202 * untie */
f9c6fee5
CS		 203 if (!SvMAGIC(sv)) {
204 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
58f82c5c 205 break;
f9c6fee5 206 }
b77f7d40 207
f9c6fee5 208 /* recalculate flags if this entry was deleted. */
ff76feab 209 if (mg->mg_flags & MGf_GSKIP)
f9c6fee5 210 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
a0d0e21e 211 }
ff76feab 212
f9c6fee5 213 mg = nextmg;
ff76feab 214
0723351e 215 if (have_new) {
ff76feab
AMS		 216 /* Have we finished with the new entries we saw? Start again
217 where we left off (unless there are more new entries). */
218 if (mg == head) {
0723351e 219 have_new = 0;
ff76feab
AMS		 220 mg = cur;
221 head = newmg;
222 }
223 }
224
225 /* Were any new entries added? */
0723351e
NC		 226 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
227 have_new = 1;
ff76feab
AMS		 228 cur = mg;
229 mg = newmg;
f9c6fee5 230 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
760ac839 231 }
79072805 232 }
463ee0b2 233
8772537c 234 restore_magic(INT2PTR(void *, (IV)mgs_ix));
79072805
LW		 235 return 0;
236}
237
954c1994
GS		 238/*
239=for apidoc mg_set
240
241Do magic after a value is assigned to the SV. See C<sv_magic>.
242
243=cut
244*/
245
79072805 246int
864dbfa3 247Perl_mg_set(pTHX_ SV *sv)
79072805 248{
97aff369 249 dVAR;
35a4481c 250 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 251 MAGIC* mg;
463ee0b2
LW		 252 MAGIC* nextmg;
253
7918f24d
NC		 254 PERL_ARGS_ASSERT_MG_SET;
255
b5ed8c44
FC		 256 if (PL_localizing == 2 && sv == DEFSV) return 0;
257
455ece5e 258 save_magic(mgs_ix, sv);
463ee0b2
LW		 259
260 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 261 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 262 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW		 263 if (mg->mg_flags & MGf_GSKIP) {
264 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
f9c6fee5 265 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
a0d0e21e 266 }
e0a73de4 267 if (PL_localizing == 2
b5ed8c44 268 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
e7cbf6c6 269 continue;
2b260de0 270 if (vtbl && vtbl->svt_set)
16c91539 271 vtbl->svt_set(aTHX_ sv, mg);
79072805 272 }
463ee0b2 273
8772537c 274 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW		 275 return 0;
276}
277
954c1994
GS		 278/*
279=for apidoc mg_length
280
281Report on the SV's length. See C<sv_magic>.
282
283=cut
284*/
285
79072805 286U32
864dbfa3 287Perl_mg_length(pTHX_ SV *sv)
79072805 288{
97aff369 289 dVAR;
79072805 290 MAGIC* mg;
463ee0b2 291 STRLEN len;
463ee0b2 292
7918f24d
NC		 293 PERL_ARGS_ASSERT_MG_LENGTH;
294
79072805 295 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 296 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 297 if (vtbl && vtbl->svt_len) {
35a4481c 298 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 299 save_magic(mgs_ix, sv);
a0d0e21e 300 /* omit MGf_GSKIP -- not changed here */
16c91539 301 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 302 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW		 303 return len;
304 }
305 }
306
d0644529
NC		 307 {
308 /* You can't know whether it's UTF-8 until you get the string again...
309 */
10516c54 310 const U8 *s = (U8*)SvPV_const(sv, len);
d0644529
NC		 311
312 if (DO_UTF8(sv)) {
313 len = utf8_length(s, s + len);
314 }
5636d518 315 }
463ee0b2 316 return len;
79072805
LW		 317}
318
8fb26106 319I32
864dbfa3 320Perl_mg_size(pTHX_ SV *sv)
93965878
NIS		 321{
322 MAGIC* mg;
ac27b0f5 323
7918f24d
NC		 324 PERL_ARGS_ASSERT_MG_SIZE;
325
93965878 326 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 327 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 328 if (vtbl && vtbl->svt_len) {
35a4481c
AL		 329 const I32 mgs_ix = SSNEW(sizeof(MGS));
330 I32 len;
455ece5e 331 save_magic(mgs_ix, sv);
93965878 332 /* omit MGf_GSKIP -- not changed here */
16c91539 333 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 334 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS		 335 return len;
336 }
337 }
338
339 switch(SvTYPE(sv)) {
340 case SVt_PVAV:
502c6561 341 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
93965878
NIS		 342 case SVt_PVHV:
343 /* FIXME */
344 default:
cea2e8a9 345 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS		 346 break;
347 }
348 return 0;
349}
350
954c1994
GS		 351/*
352=for apidoc mg_clear
353
354Clear something magical that the SV represents. See C<sv_magic>.
355
356=cut
357*/
358
79072805 359int
864dbfa3 360Perl_mg_clear(pTHX_ SV *sv)
79072805 361{
35a4481c 362 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 363 MAGIC* mg;
8ac77ac9 364 MAGIC *nextmg;
463ee0b2 365
7918f24d
NC		 366 PERL_ARGS_ASSERT_MG_CLEAR;
367
455ece5e 368 save_magic(mgs_ix, sv);
463ee0b2 369
8ac77ac9 370 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
35a4481c 371 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 372 /* omit GSKIP -- never set here */
727405f8 373
8ac77ac9
NC		 374 nextmg = mg->mg_moremagic; /* it may delete itself */
375
2b260de0 376 if (vtbl && vtbl->svt_clear)
16c91539 377 vtbl->svt_clear(aTHX_ sv, mg);
79072805 378 }
463ee0b2 379
8772537c 380 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW		 381 return 0;
382}
383
ed624ca8 384static MAGIC*
39de7f53
FR		 385S_mg_findext_flags(pTHX_ const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
386{
387 PERL_UNUSED_CONTEXT;
388
389 assert(flags <= 1);
390
391 if (sv) {
392 MAGIC *mg;
393
394 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
395 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
396 return mg;
397 }
398 }
399 }
400
401 return NULL;
402}
403
954c1994
GS		 404/*
405=for apidoc mg_find
406
407Finds the magic pointer for type matching the SV. See C<sv_magic>.
408
409=cut
410*/
411
93a17b20 412MAGIC*
35a4481c 413Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 414{
39de7f53
FR		 415 return S_mg_findext_flags(aTHX_ sv, type, NULL, 0);
416}
417
418/*
419=for apidoc mg_findext
420
421Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
422C<sv_magicext>.
423
424=cut
425*/
426
427MAGIC*
428Perl_mg_findext(pTHX_ const SV *sv, int type, const MGVTBL *vtbl)
429{
430 return S_mg_findext_flags(aTHX_ sv, type, vtbl, 1);
93a17b20
LW		 431}
432
954c1994
GS		 433/*
434=for apidoc mg_copy
435
436Copies the magic from one SV to another. See C<sv_magic>.
437
438=cut
439*/
440
79072805 441int
864dbfa3 442Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 443{
463ee0b2 444 int count = 0;
79072805 445 MAGIC* mg;
7918f24d
NC		 446
447 PERL_ARGS_ASSERT_MG_COPY;
448
463ee0b2 449 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 450 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93 451 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
16c91539 452 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
68795e93 453 }
823a54a3
AL		 454 else {
455 const char type = mg->mg_type;
1e73acc8 456 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL		 457 sv_magic(nsv,
458 (type == PERL_MAGIC_tied)
459 ? SvTIED_obj(sv, mg)
460 : (type == PERL_MAGIC_regdata && mg->mg_obj)
461 ? sv
462 : mg->mg_obj,
463 toLOWER(type), key, klen);
464 count++;
465 }
79072805 466 }
79072805 467 }
463ee0b2 468 return count;
79072805
LW		 469}
470
954c1994 471/*
0cbee0a4
DM		 472=for apidoc mg_localize
473
9711599e
CS		 474Copy some of the magic from an existing SV to new localized version of that
475SV. Container magic (eg %ENV, $1, tie) gets copied, value magic doesn't (eg
476taint, pos).
477
af7df257 478If setmagic is false then no set magic will be called on the new (empty) SV.
9711599e
CS		 479This typically means that assignment will soon follow (e.g. 'local $x = $y'),
480and that will handle the magic.
0cbee0a4
DM		 481
482=cut
483*/
484
485void
af7df257 486Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
0cbee0a4 487{
97aff369 488 dVAR;
0cbee0a4 489 MAGIC *mg;
7918f24d
NC		 490
491 PERL_ARGS_ASSERT_MG_LOCALIZE;
492
658a9f31
JD		 493 if (nsv == DEFSV)
494 return;
495
0cbee0a4 496 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 497 const MGVTBL* const vtbl = mg->mg_virtual;
e0a73de4 498 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
0cbee0a4 499 continue;
0cbee0a4 500
a5063e7c 501 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
16c91539 502 (void)vtbl->svt_local(aTHX_ nsv, mg);
a5063e7c 503 else
0cbee0a4
DM		 504 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
505 mg->mg_ptr, mg->mg_len);
a5063e7c 506
0cbee0a4 507 /* container types should remain read-only across localization */
b2b95e4c 508 if (!SvIsCOW(sv)) SvFLAGS(nsv) |= SvREADONLY(sv);
0cbee0a4
DM		 509 }
510
511 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
512 SvFLAGS(nsv) |= SvMAGICAL(sv);
af7df257 513 if (setmagic) {
9711599e
CS		 514 PL_localizing = 1;
515 SvSETMAGIC(nsv);
516 PL_localizing = 0;
517 }
0cbee0a4
DM		 518 }
519}
520
d9088386
Z		 521#define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
522static void
523S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
524{
525 const MGVTBL* const vtbl = mg->mg_virtual;
526 if (vtbl && vtbl->svt_free)
527 vtbl->svt_free(aTHX_ sv, mg);
528 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
529 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
530 Safefree(mg->mg_ptr);
531 else if (mg->mg_len == HEf_SVKEY)
532 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
533 }
534 if (mg->mg_flags & MGf_REFCOUNTED)
535 SvREFCNT_dec(mg->mg_obj);
536 Safefree(mg);
537}
538
0cbee0a4 539/*
954c1994
GS		 540=for apidoc mg_free
541
542Free any magic storage used by the SV. See C<sv_magic>.
543
544=cut
545*/
546
79072805 547int
864dbfa3 548Perl_mg_free(pTHX_ SV *sv)
79072805
LW		 549{
550 MAGIC* mg;
551 MAGIC* moremagic;
7918f24d
NC		 552
553 PERL_ARGS_ASSERT_MG_FREE;
554
79072805 555 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
79072805 556 moremagic = mg->mg_moremagic;
d9088386 557 mg_free_struct(sv, mg);
c826f41b 558 SvMAGIC_set(sv, moremagic);
79072805 559 }
b162af07 560 SvMAGIC_set(sv, NULL);
68f8932e 561 SvMAGICAL_off(sv);
79072805
LW		 562 return 0;
563}
564
d9088386
Z		 565/*
566=for apidoc Am|void|mg_free_type|SV *sv|int how
567
568Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
569
570=cut
571*/
572
573void
574Perl_mg_free_type(pTHX_ SV *sv, int how)
575{
576 MAGIC *mg, *prevmg, *moremg;
577 PERL_ARGS_ASSERT_MG_FREE_TYPE;
578 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
579 MAGIC *newhead;
580 moremg = mg->mg_moremagic;
581 if (mg->mg_type == how) {
582 /* temporarily move to the head of the magic chain, in case
583 custom free code relies on this historical aspect of mg_free */
584 if (prevmg) {
585 prevmg->mg_moremagic = moremg;
586 mg->mg_moremagic = SvMAGIC(sv);
587 SvMAGIC_set(sv, mg);
588 }
589 newhead = mg->mg_moremagic;
590 mg_free_struct(sv, mg);
591 SvMAGIC_set(sv, newhead);
592 mg = prevmg;
593 }
594 }
595 mg_magical(sv);
596}
597
79072805 598#include <signal.h>
79072805 599
942e002e 600U32
864dbfa3 601Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 602{
97aff369 603 dVAR;
8772537c 604 PERL_UNUSED_ARG(sv);
6cef1e77 605
7918f24d
NC		 606 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
607
0bd48802
AL		 608 if (PL_curpm) {
609 register const REGEXP * const rx = PM_GETRE(PL_curpm);
610 if (rx) {
a678b0e4
YO		 611 if (mg->mg_obj) { /* @+ */
612 /* return the number possible */
07bc277f 613 return RX_NPARENS(rx);
a678b0e4 614 } else { /* @- */
07bc277f 615 I32 paren = RX_LASTPAREN(rx);
a678b0e4
YO		 616
617 /* return the last filled */
f46c4081 618 while ( paren >= 0
07bc277f
NC		 619 && (RX_OFFS(rx)[paren].start == -1
620 || RX_OFFS(rx)[paren].end == -1) )
f46c4081 621 paren--;
a678b0e4
YO		 622 return (U32)paren;
623 }
0bd48802 624 }
8f580fb8 625 }
ac27b0f5 626
942e002e 627 return (U32)-1;
6cef1e77
IZ		 628}
629
630int
864dbfa3 631Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 632{
97aff369 633 dVAR;
7918f24d
NC		 634
635 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
636
0bd48802
AL		 637 if (PL_curpm) {
638 register const REGEXP * const rx = PM_GETRE(PL_curpm);
639 if (rx) {
640 register const I32 paren = mg->mg_len;
641 register I32 s;
642 register I32 t;
643 if (paren < 0)
644 return 0;
07bc277f
NC		 645 if (paren <= (I32)RX_NPARENS(rx) &&
646 (s = RX_OFFS(rx)[paren].start) != -1 &&
647 (t = RX_OFFS(rx)[paren].end) != -1)
0bd48802
AL		 648 {
649 register I32 i;
650 if (mg->mg_obj) /* @+ */
651 i = t;
652 else /* @- */
653 i = s;
654
655 if (i > 0 && RX_MATCH_UTF8(rx)) {
07bc277f 656 const char * const b = RX_SUBBEG(rx);
0bd48802 657 if (b)
f5a63d97 658 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 659 }
727405f8 660
0bd48802 661 sv_setiv(sv, i);
1aa99e6b 662 }
0bd48802 663 }
6cef1e77
IZ		 664 }
665 return 0;
666}
667
e4b89193 668int
a29d06ed
MG		 669Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
670{
7918f24d 671 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
d4c19fe8
AL		 672 PERL_UNUSED_ARG(sv);
673 PERL_UNUSED_ARG(mg);
6ad8f254 674 Perl_croak_no_modify(aTHX);
0dbb1585 675 NORETURN_FUNCTION_END;
a29d06ed
MG		 676}
677
93a17b20 678U32
864dbfa3 679Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 680{
97aff369 681 dVAR;
93a17b20 682 register I32 paren;
93a17b20 683 register I32 i;
2fdbfb4d
AB		 684 register const REGEXP * rx;
685 const char * const remaining = mg->mg_ptr + 1;
93a17b20 686
7918f24d
NC		 687 PERL_ARGS_ASSERT_MAGIC_LEN;
688
93a17b20 689 switch (*mg->mg_ptr) {
2fdbfb4d
AB		 690 case '\020':
691 if (*remaining == '\0') { /* ^P */
692 break;
693 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
694 goto do_prematch;
695 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
696 goto do_postmatch;
697 }
698 break;
699 case '\015': /* $^MATCH */
700 if (strEQ(remaining, "ATCH")) {
701 goto do_match;
702 } else {
703 break;
704 }
705 case '`':
706 do_prematch:
f1b875a0 707 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB		 708 goto maybegetparen;
709 case '\'':
710 do_postmatch:
f1b875a0 711 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB		 712 goto maybegetparen;
713 case '&':
714 do_match:
f1b875a0 715 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d 716 goto maybegetparen;
93a17b20 717 case '1': case '2': case '3': case '4':
2fdbfb4d
AB		 718 case '5': case '6': case '7': case '8': case '9':
719 paren = atoi(mg->mg_ptr);
720 maybegetparen:
aaa362c4 721 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB		 722 getparen:
723 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 724
ffc61ed2 725 if (i < 0)
0844c848 726 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 727 return i;
2fdbfb4d 728 } else {
235bddc8 729 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 730 report_uninit(sv);
2fdbfb4d 731 return 0;
93a17b20 732 }
93a17b20 733 case '+':
aaa362c4 734 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 735 paren = RX_LASTPAREN(rx);
13f57bf8
CS		 736 if (paren)
737 goto getparen;
93a17b20 738 }
748a9306 739 return 0;
a01268b5
JH		 740 case '\016': /* ^N */
741 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 742 paren = RX_LASTCLOSEPAREN(rx);
a01268b5
JH		 743 if (paren)
744 goto getparen;
745 }
746 return 0;
93a17b20
LW		 747 }
748 magic_get(sv,mg);
2d8e6c8d 749 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 750 sv_2pv(sv, 0);
2d8e6c8d 751 }
93a17b20
LW		 752 if (SvPOK(sv))
753 return SvCUR(sv);
754 return 0;
755}
756
ad3296c6 757#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA		 758 if (SvPOK(sv)) { \
759 STRLEN len = SvCUR(sv); \
760 char * const p = SvPVX(sv); \
8e6b4db6
PC		 761 while (len > 0 && isSPACE(p[len-1])) \
762 --len; \
763 SvCUR_set(sv, len); \
764 p[len] = '\0'; \
765 } \
ad3296c6
SH		 766} STMT_END
767
8b850bd5
NC		 768void
769Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
770{
7918f24d
NC		 771 PERL_ARGS_ASSERT_EMULATE_COP_IO;
772
8b850bd5
NC		 773 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
774 sv_setsv(sv, &PL_sv_undef);
775 else {
776 sv_setpvs(sv, "");
777 SvUTF8_off(sv);
778 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
20439bc7 779 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
8b850bd5
NC		 780 assert(value);
781 sv_catsv(sv, value);
782 }
783 sv_catpvs(sv, "\0");
784 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
20439bc7 785 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
8b850bd5
NC		 786 assert(value);
787 sv_catsv(sv, value);
788 }
789 }
790}
791
25bbd826
CB		 792#ifdef VMS
793#include <descrip.h>
794#include <starlet.h>
795#endif
796
79072805 797int
864dbfa3 798Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 799{
27da23d5 800 dVAR;
79072805 801 register I32 paren;
db7198b5 802 register const char *s = NULL;
d9f97599 803 register REGEXP *rx;
823a54a3
AL		 804 const char * const remaining = mg->mg_ptr + 1;
805 const char nextchar = *remaining;
79072805 806
7918f24d
NC		 807 PERL_ARGS_ASSERT_MAGIC_GET;
808
79072805 809 switch (*mg->mg_ptr) {
748a9306 810 case '\001': /* ^A */
3280af22 811 sv_setsv(sv, PL_bodytarget);
125b9982
NT		 812 if (SvTAINTED(PL_bodytarget))
813 SvTAINTED_on(sv);
748a9306 814 break;
e5218da5 815 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 816 if (nextchar == '\0') {
e5218da5
GA		 817 sv_setiv(sv, (IV)PL_minus_c);
818 }
823a54a3 819 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA		 820 sv_setiv(sv, (IV)STATUS_NATIVE);
821 }
49460fe6
NIS		 822 break;
823
79072805 824 case '\004': /* ^D */
aea4f609 825 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 826 break;
28f23441 827 case '\005': /* ^E */
823a54a3 828 if (nextchar == '\0') {
e37778c2 829#if defined(VMS)
0a378802 830 {
0a378802
JH		 831 char msg[255];
832 $DESCRIPTOR(msgdsc,msg);
833 sv_setnv(sv,(NV) vaxc$errno);
834 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
835 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
836 else
76f68e9b 837 sv_setpvs(sv,"");
0a378802 838 }
4b645107 839#elif defined(OS2)
0a378802
JH		 840 if (!(_emx_env & 0x200)) { /* Under DOS */
841 sv_setnv(sv, (NV)errno);
842 sv_setpv(sv, errno ? Strerror(errno) : "");
843 } else {
844 if (errno != errno_isOS2) {
823a54a3 845 const int tmp = _syserrno();
0a378802
JH		 846 if (tmp) /* 2nd call to _syserrno() makes it 0 */
847 Perl_rc = tmp;
848 }
849 sv_setnv(sv, (NV)Perl_rc);
850 sv_setpv(sv, os2error(Perl_rc));
851 }
4b645107 852#elif defined(WIN32)
0a378802 853 {
d4c19fe8 854 const DWORD dwErr = GetLastError();
0a378802 855 sv_setnv(sv, (NV)dwErr);
823a54a3 856 if (dwErr) {
0a378802
JH		 857 PerlProc_GetOSError(sv, dwErr);
858 }
859 else
76f68e9b 860 sv_setpvs(sv, "");
0a378802
JH		 861 SetLastError(dwErr);
862 }
22fae026 863#else
f6c8f21d 864 {
4ee39169 865 dSAVE_ERRNO;
f6c8f21d 866 sv_setnv(sv, (NV)errno);
666ea192 867 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 868 RESTORE_ERRNO;
f6c8f21d 869 }
28f23441 870#endif
ad3296c6 871 SvRTRIM(sv);
0a378802
JH		 872 SvNOK_on(sv); /* what a wonderful hack! */
873 }
823a54a3 874 else if (strEQ(remaining, "NCODING"))
0a378802
JH		 875 sv_setsv(sv, PL_encoding);
876 break;
79072805 877 case '\006': /* ^F */
3280af22 878 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 879 break;
9ebf26ad
FR		 880 case '\007': /* ^GLOBAL_PHASE */
881 if (strEQ(remaining, "LOBAL_PHASE")) {
882 sv_setpvn(sv, PL_phase_names[PL_phase],
883 strlen(PL_phase_names[PL_phase]));
884 }
885 break;
a0d0e21e 886 case '\010': /* ^H */
3280af22 887 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 888 break;
9d116dd7 889 case '\011': /* ^I */ /* NOT \t in EBCDIC */
120f7abe 890 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
79072805 891 break;
ac27b0f5 892 case '\017': /* ^O & ^OPEN */
823a54a3 893 if (nextchar == '\0') {
ac27b0f5 894 sv_setpv(sv, PL_osname);
3511154c
DM		 895 SvTAINTED_off(sv);
896 }
823a54a3 897 else if (strEQ(remaining, "PEN")) {
8b850bd5 898 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 899 }
28f23441 900 break;
9ebf26ad 901 case '\020':
cde0cee5
YO		 902 if (nextchar == '\0') { /* ^P */
903 sv_setiv(sv, (IV)PL_perldb);
904 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
905 goto do_prematch_fetch;
906 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
907 goto do_postmatch_fetch;
908 }
79072805 909 break;
fb73857a 910 case '\023': /* ^S */
823a54a3 911 if (nextchar == '\0') {
bc177e6b 912 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 913 SvOK_off(sv);
3280af22 914 else if (PL_in_eval)
6dc8a9e4 915 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS		 916 else
917 sv_setiv(sv, 0);
d58bf5aa 918 }
fb73857a 919 break;
79072805 920 case '\024': /* ^T */
823a54a3 921 if (nextchar == '\0') {
88e89b8a 922#ifdef BIG_TIME
7c36658b 923 sv_setnv(sv, PL_basetime);
88e89b8a 924#else
7c36658b 925 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 926#endif
7c36658b 927 }
823a54a3 928 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS		 929 sv_setiv(sv, PL_tainting
930 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
931 : 0);
7c36658b 932 break;
e07ea26a 933 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 934 if (strEQ(remaining, "NICODE"))
a05d7ebb 935 sv_setuv(sv, (UV) PL_unicode);
823a54a3 936 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 937 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC		 938 else if (strEQ(remaining, "TF8CACHE"))
939 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH		 940 break;
941 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 942 if (nextchar == '\0')
4438c4b7 943 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 944 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 945 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 946 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS		 947 }
948 else if (PL_compiling.cop_warnings == pWARN_STD) {
7e4f0450
FC		 949 sv_setsv(sv, &PL_sv_undef);
950 break;
013b78e8 951 }
d3a7d8c7 952 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS		 953 /* Get the bit mask for $warnings::Bits{all}, because
954 * it could have been extended by warnings::register */
6673a63c 955 HV * const bits=get_hv("warnings::Bits", 0);
f5a63d97
AL		 956 if (bits) {
957 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
958 if (bits_all)
959 sv_setsv(sv, *bits_all);
75b6c4ca
RGS		 960 }
961 else {
962 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
963 }
ac27b0f5 964 }
4438c4b7 965 else {
72dc9ed5
NC		 966 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
967 *PL_compiling.cop_warnings);
ac27b0f5 968 }
d3a7d8c7 969 SvPOK_only(sv);
4438c4b7 970 }
79072805 971 break;
cde0cee5
YO		 972 case '\015': /* $^MATCH */
973 if (strEQ(remaining, "ATCH")) {
79072805
LW		 974 case '1': case '2': case '3': case '4':
975 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO		 976 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
977 /*
159b6efe 978 * Pre-threads, this was paren = atoi(GvENAME((const GV *)mg->mg_obj));
cde0cee5
YO		 979 * XXX Does the new way break anything?
980 */
981 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 982 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO		 983 break;
984 }
985 sv_setsv(sv,&PL_sv_undef);
79072805
LW		 986 }
987 break;
988 case '+':
aaa362c4 989 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC		 990 if (RX_LASTPAREN(rx)) {
991 CALLREG_NUMBUF_FETCH(rx,RX_LASTPAREN(rx),sv);
44a2ac75
YO		 992 break;
993 }
79072805 994 }
3280af22 995 sv_setsv(sv,&PL_sv_undef);
79072805 996 break;
a01268b5
JH		 997 case '\016': /* ^N */
998 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC		 999 if (RX_LASTCLOSEPAREN(rx)) {
1000 CALLREG_NUMBUF_FETCH(rx,RX_LASTCLOSEPAREN(rx),sv);
44a2ac75
YO		 1001 break;
1002 }
1003
a01268b5
JH		 1004 }
1005 sv_setsv(sv,&PL_sv_undef);
1006 break;
79072805 1007 case '`':
cde0cee5 1008 do_prematch_fetch:
aaa362c4 1009 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 1010 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 1011 break;
79072805 1012 }
3280af22 1013 sv_setsv(sv,&PL_sv_undef);
79072805
LW		 1014 break;
1015 case '\'':
cde0cee5 1016 do_postmatch_fetch:
aaa362c4 1017 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 1018 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 1019 break;
79072805 1020 }
3280af22 1021 sv_setsv(sv,&PL_sv_undef);
79072805
LW		 1022 break;
1023 case '.':
3280af22 1024 if (GvIO(PL_last_in_gv)) {
357c8808 1025 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 1026 }
79072805
LW		 1027 break;
1028 case '?':
809a5acc 1029 {
809a5acc 1030 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 1031#ifdef COMPLEX_STATUS
41cb7b2b 1032 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS		 1033 LvTARGOFF(sv) = PL_statusvalue;
1034 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 1035#endif
809a5acc 1036 }
79072805
LW		 1037 break;
1038 case '^':
acbe1b9d 1039 if (GvIOp(PL_defoutgv))
099be4f1 1040 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW		 1041 if (s)
1042 sv_setpv(sv,s);
1043 else {
3280af22 1044 sv_setpv(sv,GvENAME(PL_defoutgv));
cb421d5e 1045 sv_catpvs(sv,"_TOP");
79072805
LW		 1046 }
1047 break;
1048 case '~':
acbe1b9d 1049 if (GvIOp(PL_defoutgv))
0daa599b 1050 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 1051 if (!s)
3280af22 1052 s = GvENAME(PL_defoutgv);
79072805
LW		 1053 sv_setpv(sv,s);
1054 break;
79072805 1055 case '=':
099be4f1 1056 if (GvIO(PL_defoutgv))
0daa599b 1057 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW		 1058 break;
1059 case '-':
099be4f1 1060 if (GvIO(PL_defoutgv))
0daa599b 1061 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW		 1062 break;
1063 case '%':
099be4f1 1064 if (GvIO(PL_defoutgv))
0daa599b 1065 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 1066 break;
79072805
LW		 1067 case ':':
1068 break;
1069 case '/':
1070 break;
1071 case '[':
e1dccc0d 1072 sv_setiv(sv, 0);
79072805
LW		 1073 break;
1074 case '|':
099be4f1 1075 if (GvIO(PL_defoutgv))
0daa599b 1076 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805 1077 break;
79072805 1078 case '\\':
b2ce0fda 1079 if (PL_ors_sv)
f28098ff 1080 sv_copypv(sv, PL_ors_sv);
79072805 1081 break;
0e219455 1082 case '$': /* $$ */
9cdac2a2
FC		 1083 {
1084 IV const pid = (IV)PerlProc_getpid();
19db9fb7 1085 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
9cdac2a2
FC		 1086 /* never set manually, or at least not since last fork */
1087 sv_setiv(sv, pid);
19db9fb7
Z		 1088 /* never unsafe, even if reading in a tainted expression */
1089 SvTAINTED_off(sv);
1090 }
9cdac2a2
FC		 1091 /* else a value has been assigned manually, so do nothing */
1092 }
0e219455
MM		 1093 break;
1094
79072805 1095 case '!':
666d8aa2
CB		 1096 {
1097 dSAVE_ERRNO;
a5f75d66 1098#ifdef VMS
65202027 1099 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
a5f75d66 1100#else
65202027 1101 sv_setnv(sv, (NV)errno);
666d8aa2 1102#endif
88e89b8a 1103#ifdef OS2
ed344e4f
IZ		 1104 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1105 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 1106 else
a5f75d66 1107#endif
666ea192 1108 sv_setpv(sv, errno ? Strerror(errno) : "");
be1cf43c
NC		 1109 if (SvPOKp(sv))
1110 SvPOK_on(sv); /* may have got removed during taint processing */
4ee39169 1111 RESTORE_ERRNO;
88e89b8a 1112 }
666d8aa2 1113
ad3296c6 1114 SvRTRIM(sv);
946ec16e 1115 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW		 1116 break;
1117 case '<':
985213f2 1118 sv_setiv(sv, (IV)PerlProc_getuid());
79072805
LW		 1119 break;
1120 case '>':
985213f2 1121 sv_setiv(sv, (IV)PerlProc_geteuid());
79072805
LW		 1122 break;
1123 case '(':
985213f2 1124 sv_setiv(sv, (IV)PerlProc_getgid());
79072805
LW		 1125 goto add_groups;
1126 case ')':
985213f2 1127 sv_setiv(sv, (IV)PerlProc_getegid());
79072805 1128 add_groups:
79072805 1129#ifdef HAS_GETGROUPS
79072805 1130 {
57d7c65e 1131 Groups_t *gary = NULL;
fb45abb2 1132 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC		 1133 Newx(gary, num_groups, Groups_t);
1134 num_groups = getgroups(num_groups, gary);
fb45abb2
GA		 1135 for (i = 0; i < num_groups; i++)
1136 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1137 Safefree(gary);
79072805 1138 }
155aba94 1139 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1140#endif
79072805 1141 break;
79072805
LW		 1142 case '0':
1143 break;
1144 }
a0d0e21e 1145 return 0;
79072805
LW		 1146}
1147
1148int
864dbfa3 1149Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1150{
8772537c 1151 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 1152
7918f24d
NC		 1153 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1154
79072805 1155 if (uf && uf->uf_val)
24f81a43 1156 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW		 1157 return 0;
1158}
1159
1160int
864dbfa3 1161Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1162{
27da23d5 1163 dVAR;
9ae3433d 1164 STRLEN len = 0, klen;
666ea192 1165 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1166 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1167 my_setenv(ptr, s);
1e422769 1168
7918f24d
NC		 1169 PERL_ARGS_ASSERT_MAGIC_SETENV;
1170
a0d0e21e
LW		 1171#ifdef DYNAMIC_ENV_FETCH
1172 /* We just undefd an environment var. Is a replacement */
1173 /* waiting in the wings? */
1174 if (!len) {
fabdb6c0
AL		 1175 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1176 if (valp)
4ab59fcc 1177 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW		 1178 }
1179#endif
1e422769 1180
39e571d4 1181#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW		 1182 /* And you'll never guess what the dog had */
1183 /* in its mouth... */
3280af22 1184 if (PL_tainting) {
1e422769 1185 MgTAINTEDDIR_off(mg);
1186#ifdef VMS
5aabfad6 1187 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1188 char pathbuf[256], eltbuf[256], *cp, *elt;
1e422769 1189 int i = 0, j = 0;
1190
6fca0082 1191 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1192 elt = eltbuf;
1e422769 1193 do { /* DCL$PATH may be a search list */
1194 while (1) { /* as may dev portion of any element */
1195 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1196 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1197 cando_by_name(S_IWUSR,0,elt) ) {
1198 MgTAINTEDDIR_on(mg);
1199 return 0;
1200 }
1201 }
bd61b366 1202 if ((cp = strchr(elt, ':')) != NULL)
1e422769 1203 *cp = '\0';
1204 if (my_trnlnm(elt, eltbuf, j++))
1205 elt = eltbuf;
1206 else
1207 break;
1208 }
1209 j = 0;
1210 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1211 }
1212#endif /* VMS */
5aabfad6 1213 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1214 const char * const strend = s + len;
463ee0b2
LW		 1215
1216 while (s < strend) {
96827780 1217 char tmpbuf[256];
c623ac67 1218 Stat_t st;
5f74f29c 1219 I32 i;
f5a63d97
AL		 1220#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1221 const char path_sep = '|';
1222#else
1223 const char path_sep = ':';
1224#endif
96827780 1225 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1226 s, strend, path_sep, &i);
463ee0b2 1227 s++;
bb7a0f54 1228 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB		 1229#ifdef VMS
1230 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1231#else
1232 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1233#endif
c6ed36e1 1234 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1235 MgTAINTEDDIR_on(mg);
1e422769 1236 return 0;
1237 }
463ee0b2 1238 }
79072805
LW		 1239 }
1240 }
39e571d4 1241#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1242
79072805
LW		 1243 return 0;
1244}
1245
1246int
864dbfa3 1247Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1248{
7918f24d 1249 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
8772537c 1250 PERL_UNUSED_ARG(sv);
bd61b366 1251 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW		 1252 return 0;
1253}
1254
88e89b8a 1255int
864dbfa3 1256Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1257{
97aff369 1258 dVAR;
7918f24d 1259 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
65e66c80 1260 PERL_UNUSED_ARG(mg);
b0269e46 1261#if defined(VMS)
cea2e8a9 1262 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1263#else
3280af22 1264 if (PL_localizing) {
fb73857a 1265 HE* entry;
b0269e46 1266 my_clearenv();
85fbaab2
NC		 1267 hv_iterinit(MUTABLE_HV(sv));
1268 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
fb73857a 1269 I32 keylen;
1270 my_setenv(hv_iterkey(entry, &keylen),
85fbaab2 1271 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
fb73857a 1272 }
1273 }
1274#endif
1275 return 0;
1276}
1277
1278int
864dbfa3 1279Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1280{
27da23d5 1281 dVAR;
7918f24d 1282 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
8772537c
AL		 1283 PERL_UNUSED_ARG(sv);
1284 PERL_UNUSED_ARG(mg);
b0269e46
AB		 1285#if defined(VMS)
1286 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1287#else
1288 my_clearenv();
1289#endif
3e3baf6d 1290 return 0;
66b1d557
HM		 1291}
1292
64ca3a65 1293#ifndef PERL_MICRO
2d4fcd5e
AJ		 1294#ifdef HAS_SIGPROCMASK
1295static void
1296restore_sigmask(pTHX_ SV *save_sv)
1297{
0bd48802 1298 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1299 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ		 1300}
1301#endif
66b1d557 1302int
864dbfa3 1303Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1304{
97aff369 1305 dVAR;
88e89b8a 1306 /* Are we fetching a signal entry? */
708854f2 1307 int i = (I16)mg->mg_private;
7918f24d
NC		 1308
1309 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1310
708854f2 1311 if (!i) {
84c7b88c
BF		 1312 STRLEN siglen;
1313 const char * sig = MgPV_const(mg, siglen);
1314 mg->mg_private = i = whichsig_pvn(sig, siglen);
708854f2
NC		 1315 }
1316
e02bfb16 1317 if (i > 0) {
22c35a8c
GS		 1318 if(PL_psig_ptr[i])
1319 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1320 else {
46da273f 1321 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1322#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL		 1323 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1324 sigstate = SIG_IGN;
2e34cc90
CL		 1325#endif
1326#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL		 1327 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1328 sigstate = SIG_DFL;
85b332e2 1329#endif
88e89b8a 1330 /* cache state so we don't fetch it again */
8aad04aa 1331 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1332 sv_setpvs(sv,"IGNORE");
88e89b8a 1333 else
3280af22 1334 sv_setsv(sv,&PL_sv_undef);
46da273f 1335 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1336 SvTEMP_off(sv);
1337 }
1338 }
1339 return 0;
1340}
1341int
864dbfa3 1342Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1343{
7918f24d 1344 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
179c85a2 1345
38a124f0 1346 magic_setsig(NULL, mg);
179c85a2 1347 return sv_unmagic(sv, mg->mg_type);
88e89b8a 1348}
3d37d572 1349
0a8e0eff 1350Signal_t
8aad04aa 1351#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1352Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 1353#else
0a8e0eff 1354Perl_csighandler(int sig)
8aad04aa 1355#endif
0a8e0eff 1356{
1018e26f
NIS		 1357#ifdef PERL_GET_SIG_CONTEXT
1358 dTHXa(PERL_GET_SIG_CONTEXT);
1359#else
85b332e2
CL		 1360 dTHX;
1361#endif
23ada85b 1362#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1363 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1364 if (PL_sig_ignoring[sig]) return;
85b332e2 1365#endif
2e34cc90 1366#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1367 if (PL_sig_defaulting[sig])
2e34cc90
CL		 1368#ifdef KILL_BY_SIGPRC
1369 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1370#else
1371 exit(1);
1372#endif
1373#endif
406878dd 1374 if (
853d2c32
RGS		 1375#ifdef SIGILL
1376 sig == SIGILL ||
1377#endif
1378#ifdef SIGBUS
1379 sig == SIGBUS ||
1380#endif
1381#ifdef SIGSEGV
1382 sig == SIGSEGV ||
1383#endif
1384 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3 1385 /* Call the perl level handler now--
31c91b43 1386 * with risk we may be in malloc() or being destructed etc. */
6e324d09 1387#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1388 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB		 1389#else
1390 (*PL_sighandlerp)(sig);
92807b6d 1391#endif
406878dd 1392 else {
31c91b43 1393 if (!PL_psig_pend) return;
406878dd
GA		 1394 /* Set a flag to say this signal is pending, that is awaiting delivery after
1395 * the current Perl opcode completes */
1396 PL_psig_pend[sig]++;
1397
1398#ifndef SIG_PENDING_DIE_COUNT
1399# define SIG_PENDING_DIE_COUNT 120
1400#endif
fe13d51d 1401 /* Add one to say _a_ signal is pending */
406878dd
GA		 1402 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1403 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1404 (unsigned long)SIG_PENDING_DIE_COUNT);
1405 }
0a8e0eff
NIS		 1406}
1407
2e34cc90
CL		 1408#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1409void
1410Perl_csighandler_init(void)
1411{
1412 int sig;
27da23d5 1413 if (PL_sig_handlers_initted) return;
2e34cc90
CL		 1414
1415 for (sig = 1; sig < SIG_SIZE; sig++) {
1416#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1417 dTHX;
27da23d5 1418 PL_sig_defaulting[sig] = 1;
5c1546dc 1419 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL		 1420#endif
1421#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1422 PL_sig_ignoring[sig] = 0;
2e34cc90
CL		 1423#endif
1424 }
27da23d5 1425 PL_sig_handlers_initted = 1;
2e34cc90
CL		 1426}
1427#endif
1428
7fe50b8b
LT		 1429#if defined HAS_SIGPROCMASK
1430static void
1431unblock_sigmask(pTHX_ void* newset)
1432{
1433 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1434}
1435#endif
1436
0a8e0eff
NIS		 1437void
1438Perl_despatch_signals(pTHX)
1439{
97aff369 1440 dVAR;
0a8e0eff
NIS		 1441 int sig;
1442 PL_sig_pending = 0;
1443 for (sig = 1; sig < SIG_SIZE; sig++) {
1444 if (PL_psig_pend[sig]) {
d0166017 1445 dSAVE_ERRNO;
7fe50b8b 1446#ifdef HAS_SIGPROCMASK
55534442
LT		 1447 /* From sigaction(2) (FreeBSD man page):
1448 * | Signal routines normally execute with the signal that
1449 * | caused their invocation blocked, but other signals may
1450 * | yet occur.
1451 * Emulation of this behavior (from within Perl) is enabled
1452 * using sigprocmask
1453 */
1454 int was_blocked;
1455 sigset_t newset, oldset;
1456
1457 sigemptyset(&newset);
1458 sigaddset(&newset, sig);
1459 sigprocmask(SIG_BLOCK, &newset, &oldset);
1460 was_blocked = sigismember(&oldset, sig);
7fe50b8b
LT		 1461 if (!was_blocked) {
1462 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1463 ENTER;
1464 SAVEFREESV(save_sv);
1465 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1466 }
55534442 1467#endif
25da4428 1468 PL_psig_pend[sig] = 0;
6e324d09 1469#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1470 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB		 1471#else
1472 (*PL_sighandlerp)(sig);
92807b6d 1473#endif
7fe50b8b 1474#ifdef HAS_SIGPROCMASK
55534442 1475 if (!was_blocked)
7fe50b8b 1476 LEAVE;
55534442 1477#endif
d0166017 1478 RESTORE_ERRNO;
0a8e0eff
NIS		 1479 }
1480 }
1481}
1482
38a124f0 1483/* sv of NULL signifies that we're acting as magic_clearsig. */
85e6fe83 1484int
864dbfa3 1485Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1486{
27da23d5 1487 dVAR;
79072805 1488 I32 i;
cbbf8932 1489 SV** svp = NULL;
2d4fcd5e
AJ		 1490 /* Need to be careful with SvREFCNT_dec(), because that can have side
1491 * effects (due to closures). We must make sure that the new disposition
1492 * is in place before it is called.
1493 */
cbbf8932 1494 SV* to_dec = NULL;
e72dc28c 1495 STRLEN len;
2d4fcd5e
AJ		 1496#ifdef HAS_SIGPROCMASK
1497 sigset_t set, save;
1498 SV* save_sv;
1499#endif
d5263905 1500 register const char *s = MgPV_const(mg,len);
7918f24d
NC		 1501
1502 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1503
748a9306 1504 if (*s == '_') {
84c7b88c 1505 if (memEQs(s, len, "__DIE__"))
3280af22 1506 svp = &PL_diehook;
84c7b88c 1507 else if (memEQs(s, len, "__WARN__")
38a124f0
NC		 1508 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1509 /* Merge the existing behaviours, which are as follows:
1510 magic_setsig, we always set svp to &PL_warnhook
1511 (hence we always change the warnings handler)
1512 For magic_clearsig, we don't change the warnings handler if it's
1513 set to the &PL_warnhook. */
3280af22 1514 svp = &PL_warnhook;
84c7b88c
BF		 1515 } else if (sv) {
1516 SV *tmp = sv_newmortal();
1517 Perl_croak(aTHX_ "No such hook: %s",
1518 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1519 }
748a9306 1520 i = 0;
38a124f0 1521 if (svp && *svp) {
9289f461
RGS		 1522 if (*svp != PERL_WARNHOOK_FATAL)
1523 to_dec = *svp;
cbbf8932 1524 *svp = NULL;
4633a7c4 1525 }
748a9306
LW		 1526 }
1527 else {
708854f2
NC		 1528 i = (I16)mg->mg_private;
1529 if (!i) {
84c7b88c 1530 i = whichsig_pvn(s, len); /* ...no, a brick */
58a26b12 1531 mg->mg_private = (U16)i;
708854f2 1532 }
86d86cad 1533 if (i <= 0) {
84c7b88c
BF		 1534 if (sv) {
1535 SV *tmp = sv_newmortal();
1536 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1537 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1538 }
748a9306
LW		 1539 return 0;
1540 }
2d4fcd5e
AJ		 1541#ifdef HAS_SIGPROCMASK
1542 /* Avoid having the signal arrive at a bad time, if possible. */
1543 sigemptyset(&set);
1544 sigaddset(&set,i);
1545 sigprocmask(SIG_BLOCK, &set, &save);
1546 ENTER;
9ff8e806 1547 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ		 1548 SAVEFREESV(save_sv);
1549 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1550#endif
1551 PERL_ASYNC_CHECK();
2e34cc90 1552#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1553 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1554#endif
23ada85b 1555#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1556 PL_sig_ignoring[i] = 0;
85b332e2 1557#endif
2e34cc90 1558#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1559 PL_sig_defaulting[i] = 0;
2e34cc90 1560#endif
2d4fcd5e 1561 to_dec = PL_psig_ptr[i];
38a124f0
NC		 1562 if (sv) {
1563 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1564 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
79fd3822
NC		 1565
1566 /* Signals don't change name during the program's execution, so once
1567 they're cached in the appropriate slot of PL_psig_name, they can
1568 stay there.
1569
1570 Ideally we'd find some way of making SVs at (C) compile time, or
1571 at least, doing most of the work. */
1572 if (!PL_psig_name[i]) {
1573 PL_psig_name[i] = newSVpvn(s, len);
1574 SvREADONLY_on(PL_psig_name[i]);
1575 }
38a124f0 1576 } else {
79fd3822 1577 SvREFCNT_dec(PL_psig_name[i]);
38a124f0
NC		 1578 PL_psig_name[i] = NULL;
1579 PL_psig_ptr[i] = NULL;
1580 }
748a9306 1581 }
38a124f0 1582 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
2d4fcd5e 1583 if (i) {
5c1546dc 1584 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1585 }
748a9306 1586 else
b37c2d43 1587 *svp = SvREFCNT_inc_simple_NN(sv);
38a124f0 1588 } else {
9dfa190b
NC		 1589 if (sv && SvOK(sv)) {
1590 s = SvPV_force(sv, len);
1591 } else {
1592 sv = NULL;
1593 }
84c7b88c 1594 if (sv && memEQs(s, len,"IGNORE")) {
9dfa190b 1595 if (i) {
23ada85b 1596#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
9dfa190b
NC		 1597 PL_sig_ignoring[i] = 1;
1598 (void)rsignal(i, PL_csighandlerp);
85b332e2 1599#else
9dfa190b 1600 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1601#endif
9dfa190b 1602 }
2d4fcd5e 1603 }
84c7b88c 1604 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
9dfa190b 1605 if (i) {
2e34cc90 1606#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
9dfa190b
NC		 1607 PL_sig_defaulting[i] = 1;
1608 (void)rsignal(i, PL_csighandlerp);
2e34cc90 1609#else
9dfa190b 1610 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1611#endif
9dfa190b
NC		 1612 }
1613 }
1614 else {
1615 /*
1616 * We should warn if HINT_STRICT_REFS, but without
1617 * access to a known hint bit in a known OP, we can't
1618 * tell whether HINT_STRICT_REFS is in force or not.
1619 */
1620 if (!strchr(s,':') && !strchr(s,'\''))
1621 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1622 SV_GMAGIC);
1623 if (i)
1624 (void)rsignal(i, PL_csighandlerp);
1625 else
1626 *svp = SvREFCNT_inc_simple_NN(sv);
136e0459 1627 }
748a9306 1628 }
9dfa190b 1629
2d4fcd5e
AJ		 1630#ifdef HAS_SIGPROCMASK
1631 if(i)
1632 LEAVE;
1633#endif
ef8d46e8 1634 SvREFCNT_dec(to_dec);
79072805
LW		 1635 return 0;
1636}
64ca3a65 1637#endif /* !PERL_MICRO */
79072805
LW		 1638
1639int
864dbfa3 1640Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1641{
97aff369 1642 dVAR;
7918f24d 1643 PERL_ARGS_ASSERT_MAGIC_SETISA;
8772537c 1644 PERL_UNUSED_ARG(sv);
e1a479c5 1645
89c14e2e 1646 /* Skip _isaelem because _isa will handle it shortly */
354b0578 1647 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
89c14e2e
BB		 1648 return 0;
1649
0e446081 1650 return magic_clearisa(NULL, mg);
463ee0b2
LW		 1651}
1652
0e446081 1653/* sv of NULL signifies that we're acting as magic_setisa. */
463ee0b2 1654int
52b45067
RD		 1655Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1656{
1657 dVAR;
1658 HV* stash;
1659
7918f24d
NC		 1660 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1661
52b45067 1662 /* Bail out if destruction is going on */
627364f1 1663 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
52b45067 1664
0e446081
NC		 1665 if (sv)
1666 av_clear(MUTABLE_AV(sv));
52b45067 1667
6624142a
FC		 1668 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1669 /* This occurs with setisa_elem magic, which calls this
1670 same function. */
1671 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1672
1673 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1674 SV **svp = AvARRAY((AV *)mg->mg_obj);
1675 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1676 while (items--) {
1677 stash = GvSTASH((GV *)*svp++);
1678 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1679 }
1680
1681 return 0;
1682 }
1683
52b45067 1684 stash = GvSTASH(
6624142a 1685 (const GV *)mg->mg_obj
52b45067
RD		 1686 );
1687
00169e2c
FC		 1688 /* The stash may have been detached from the symbol table, so check its
1689 name before doing anything. */
1690 if (stash && HvENAME_get(stash))
5562fa71 1691 mro_isa_changed_in(stash);
52b45067
RD		 1692
1693 return 0;
1694}
1695
1696int
864dbfa3 1697Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1698{
85fbaab2 1699 HV * const hv = MUTABLE_HV(LvTARG(sv));
6ff81951 1700 I32 i = 0;
7918f24d
NC		 1701
1702 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
8772537c 1703 PERL_UNUSED_ARG(mg);
7719e241 1704
6ff81951 1705 if (hv) {
497b47a8 1706 (void) hv_iterinit(hv);
ad64d0ec 1707 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1b95d04f 1708 i = HvUSEDKEYS(hv);
497b47a8
JH		 1709 else {
1710 while (hv_iternext(hv))
1711 i++;
1712 }
6ff81951
GS		 1713 }
1714
1715 sv_setiv(sv, (IV)i);
1716 return 0;
1717}
1718
1719int
864dbfa3 1720Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1721{
7918f24d 1722 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
8772537c 1723 PERL_UNUSED_ARG(mg);
946ec16e 1724 if (LvTARG(sv)) {
85fbaab2 1725 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
946ec16e 1726 }
1727 return 0;
ac27b0f5 1728}
946ec16e 1729
efaf3674
DM		 1730/*
1731=for apidoc magic_methcall
1732
1733Invoke a magic method (like FETCH).
1734
2baee27b
FC		 1735C<sv> and C<mg> are the tied thingy and the tie magic.
1736
1737C<meth> is the name of the method to call.
1738
1739C<argc> is the number of args (in addition to $self) to pass to the method.
1740
1741The C<flags> can be:
1742
1743 G_DISCARD invoke method with G_DISCARD flag and don't
1744 return a value
1745 G_UNDEF_FILL fill the stack with argc pointers to
1746 PL_sv_undef
1747
1748The arguments themselves are any values following the C<flags> argument.
efaf3674
DM		 1749
1750Returns the SV (if any) returned by the method, or NULL on failure.
1751
1752
1753=cut
1754*/
1755
1756SV*
c7a0c747 1757Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
046b0c7d 1758 U32 argc, ...)
a0d0e21e 1759{
97aff369 1760 dVAR;
a0d0e21e 1761 dSP;
efaf3674 1762 SV* ret = NULL;
463ee0b2 1763
7918f24d
NC		 1764 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1765
efaf3674 1766 ENTER;
d1d7a15d
NC		 1767
1768 if (flags & G_WRITING_TO_STDERR) {
1769 SAVETMPS;
1770
1771 save_re_context();
1772 SAVESPTR(PL_stderrgv);
1773 PL_stderrgv = NULL;
1774 }
1775
efaf3674 1776 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1777 PUSHMARK(SP);
efaf3674 1778
67549bd2
NC		 1779 EXTEND(SP, argc+1);
1780 PUSHs(SvTIED_obj(sv, mg));
1781 if (flags & G_UNDEF_FILL) {
1782 while (argc--) {
efaf3674 1783 PUSHs(&PL_sv_undef);
93965878 1784 }
67549bd2 1785 } else if (argc > 0) {
046b0c7d
NC		 1786 va_list args;
1787 va_start(args, argc);
1788
1789 do {
1790 SV *const sv = va_arg(args, SV *);
1791 PUSHs(sv);
1792 } while (--argc);
1793
1794 va_end(args);
88e89b8a 1795 }
463ee0b2 1796 PUTBACK;
efaf3674
DM		 1797 if (flags & G_DISCARD) {
1798 call_method(meth, G_SCALAR|G_DISCARD);
1799 }
1800 else {
1801 if (call_method(meth, G_SCALAR))
1802 ret = *PL_stack_sp--;
1803 }
1804 POPSTACK;
d1d7a15d
NC		 1805 if (flags & G_WRITING_TO_STDERR)
1806 FREETMPS;
efaf3674
DM		 1807 LEAVE;
1808 return ret;
1809}
1810
1811
1812/* wrapper for magic_methcall that creates the first arg */
463ee0b2 1813
efaf3674 1814STATIC SV*
c7a0c747 1815S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
efaf3674
DM		 1816 int n, SV *val)
1817{
1818 dVAR;
1819 SV* arg1 = NULL;
1820
1821 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1822
1823 if (mg->mg_ptr) {
1824 if (mg->mg_len >= 0) {
db4b3a1d 1825 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
efaf3674
DM		 1826 }
1827 else if (mg->mg_len == HEf_SVKEY)
1828 arg1 = MUTABLE_SV(mg->mg_ptr);
1829 }
1830 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
db4b3a1d 1831 arg1 = newSViv((IV)(mg->mg_len));
efaf3674
DM		 1832 sv_2mortal(arg1);
1833 }
1834 if (!arg1) {
046b0c7d 1835 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
efaf3674 1836 }
046b0c7d 1837 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
946ec16e 1838}
1839
76e3520e 1840STATIC int
e1ec3a88 1841S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1842{
efaf3674
DM		 1843 dVAR;
1844 SV* ret;
463ee0b2 1845
7918f24d
NC		 1846 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1847
efaf3674
DM		 1848 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1849 if (ret)
1850 sv_setsv(sv, ret);
a0d0e21e
LW		 1851 return 0;
1852}
463ee0b2 1853
a0d0e21e 1854int
864dbfa3 1855Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1856{
7918f24d
NC		 1857 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1858
fd69380d 1859 if (mg->mg_type == PERL_MAGIC_tiedelem)
a0d0e21e 1860 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1861 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW		 1862 return 0;
1863}
1864
1865int
864dbfa3 1866Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1867{
efaf3674 1868 dVAR;
b112cff9
DM		 1869 MAGIC *tmg;
1870 SV *val;
7918f24d
NC		 1871
1872 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1873
b112cff9
DM		 1874 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1875 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1876 * public flags indicate its value based on copying from $val. Doing
1877 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1878 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1879 * wrong if $val happened to be tainted, as sv hasn't got magic
1880 * enabled, even though taint magic is in the chain. In which case,
1881 * fake up a temporary tainted value (this is easier than temporarily
1882 * re-enabling magic on sv). */
1883
1884 if (PL_tainting && (tmg = mg_find(sv, PERL_MAGIC_taint))
1885 && (tmg->mg_len & 1))
1886 {
1887 val = sv_mortalcopy(sv);
1888 SvTAINTED_on(val);
1889 }
1890 else
1891 val = sv;
1892
efaf3674 1893 magic_methcall1(sv, mg, "STORE", G_DISCARD, 2, val);
463ee0b2
LW		 1894 return 0;
1895}
1896
1897int
864dbfa3 1898Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1899{
7918f24d
NC		 1900 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1901
4c13be3f 1902 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
a0d0e21e
LW		 1903 return magic_methpack(sv,mg,"DELETE");
1904}
463ee0b2 1905
93965878
NIS		 1906
1907U32
864dbfa3 1908Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1909{
efaf3674 1910 dVAR;
22846ab4 1911 I32 retval = 0;
efaf3674 1912 SV* retsv;
93965878 1913
7918f24d
NC		 1914 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1915
efaf3674
DM		 1916 retsv = magic_methcall1(sv, mg, "FETCHSIZE", 0, 1, NULL);
1917 if (retsv) {
1918 retval = SvIV(retsv)-1;
22846ab4
AB		 1919 if (retval < -1)
1920 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1921 }
22846ab4 1922 return (U32) retval;
93965878
NIS		 1923}
1924
cea2e8a9
GS		 1925int
1926Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1927{
efaf3674 1928 dVAR;
463ee0b2 1929
7918f24d
NC		 1930 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1931
046b0c7d 1932 Perl_magic_methcall(aTHX_ sv, mg, "CLEAR", G_DISCARD, 0);
463ee0b2
LW		 1933 return 0;
1934}
1935
1936int
864dbfa3 1937Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1938{
efaf3674
DM		 1939 dVAR;
1940 SV* ret;
463ee0b2 1941
7918f24d
NC		 1942 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1943
046b0c7d
NC		 1944 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, "NEXTKEY", 0, 1, key)
1945 : Perl_magic_methcall(aTHX_ sv, mg, "FIRSTKEY", 0, 0);
efaf3674
DM		 1946 if (ret)
1947 sv_setsv(key,ret);
79072805
LW		 1948 return 0;
1949}
1950
1951int
1146e912 1952Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e 1953{
7918f24d
NC		 1954 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1955
a0d0e21e 1956 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1957}
a0d0e21e 1958
a3bcc51e
TP		 1959SV *
1960Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1961{
efaf3674 1962 dVAR;
5fcbf73d 1963 SV *retval;
ad64d0ec
NC		 1964 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1965 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
a3bcc51e 1966
7918f24d
NC		 1967 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1968
a3bcc51e
TP		 1969 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1970 SV *key;
bfcb3514 1971 if (HvEITER_get(hv))
a3bcc51e
TP		 1972 /* we are in an iteration so the hash cannot be empty */
1973 return &PL_sv_yes;
1974 /* no xhv_eiter so now use FIRSTKEY */
1975 key = sv_newmortal();
ad64d0ec 1976 magic_nextpack(MUTABLE_SV(hv), mg, key);
bfcb3514 1977 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP		 1978 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1979 }
1980
1981 /* there is a SCALAR method that we can call */
046b0c7d 1982 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, "SCALAR", 0, 0);
efaf3674 1983 if (!retval)
5fcbf73d 1984 retval = &PL_sv_undef;
a3bcc51e
TP		 1985 return retval;
1986}
1987
a0d0e21e 1988int
864dbfa3 1989Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1990{
97aff369 1991 dVAR;
8772537c
AL		 1992 GV * const gv = PL_DBline;
1993 const I32 i = SvTRUE(sv);
1994 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1995 atoi(MgPV_nolen_const(mg)), FALSE);
7918f24d
NC		 1996
1997 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
1998
8772537c
AL		 1999 if (svp && SvIOKp(*svp)) {
2000 OP * const o = INT2PTR(OP*,SvIVX(*svp));
2001 if (o) {
2002 /* set or clear breakpoint in the relevant control op */
2003 if (i)
2004 o->op_flags |= OPf_SPECIAL;
2005 else
2006 o->op_flags &= ~OPf_SPECIAL;
2007 }
5df8de69 2008 }
79072805
LW		 2009 return 0;
2010}
2011
2012int
8772537c 2013Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 2014{
97aff369 2015 dVAR;
502c6561 2016 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC		 2017
2018 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2019
83bf042f 2020 if (obj) {
e1dccc0d 2021 sv_setiv(sv, AvFILL(obj));
83bf042f
NC		 2022 } else {
2023 SvOK_off(sv);
2024 }
79072805
LW		 2025 return 0;
2026}
2027
2028int
864dbfa3 2029Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 2030{
97aff369 2031 dVAR;
502c6561 2032 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC		 2033
2034 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2035
83bf042f 2036 if (obj) {
e1dccc0d 2037 av_fill(obj, SvIV(sv));
83bf042f 2038 } else {
a2a5de95
NC		 2039 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2040 "Attempt to set length of freed array");
83bf042f
NC		 2041 }
2042 return 0;
2043}
2044
2045int
83f29afa
VP		 2046Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2047{
2048 dVAR;
2049
2050 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2051 PERL_UNUSED_ARG(sv);
2052
2053 /* Reset the iterator when the array is cleared */
2054 if (mg->mg_ptr)
2055 *((IV *) mg->mg_ptr) = 0;
2056
2057 return 0;
2058}
2059
2060int
83bf042f
NC		 2061Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2062{
97aff369 2063 dVAR;
7918f24d
NC		 2064
2065 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 2066 PERL_UNUSED_ARG(sv);
7918f24d 2067
94f3782b
DM		 2068 /* during global destruction, mg_obj may already have been freed */
2069 if (PL_in_clean_all)
1ea47f64 2070 return 0;
94f3782b 2071
83bf042f
NC		 2072 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2073
2074 if (mg) {
2075 /* arylen scalar holds a pointer back to the array, but doesn't own a
2076 reference. Hence the we (the array) are about to go away with it
2077 still pointing at us. Clear its pointer, else it would be pointing
2078 at free memory. See the comment in sv_magic about reference loops,
2079 and why it can't own a reference to us. */
2080 mg->mg_obj = 0;
2081 }
a0d0e21e
LW		 2082 return 0;
2083}
2084
2085int
864dbfa3 2086Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2087{
97aff369 2088 dVAR;
16eb5365 2089 SV* const lsv = LvTARG(sv);
7918f24d
NC		 2090
2091 PERL_ARGS_ASSERT_MAGIC_GETPOS;
16eb5365 2092 PERL_UNUSED_ARG(mg);
ac27b0f5 2093
a0d0e21e 2094 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL		 2095 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
2096 if (found && found->mg_len >= 0) {
2097 I32 i = found->mg_len;
7e2040f0 2098 if (DO_UTF8(lsv))
a0ed51b3 2099 sv_pos_b2u(lsv, &i);
e1dccc0d 2100 sv_setiv(sv, i);
a0d0e21e
LW		 2101 return 0;
2102 }
2103 }
0c34ef67 2104 SvOK_off(sv);
a0d0e21e
LW		 2105 return 0;
2106}
2107
2108int
864dbfa3 2109Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2110{
97aff369 2111 dVAR;
16eb5365 2112 SV* const lsv = LvTARG(sv);
a0d0e21e
LW		 2113 SSize_t pos;
2114 STRLEN len;
c00206c8 2115 STRLEN ulen = 0;
53d44271 2116 MAGIC* found;
a0d0e21e 2117
7918f24d 2118 PERL_ARGS_ASSERT_MAGIC_SETPOS;
16eb5365 2119 PERL_UNUSED_ARG(mg);
ac27b0f5 2120
a0d0e21e 2121 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL		 2122 found = mg_find(lsv, PERL_MAGIC_regex_global);
2123 else
2124 found = NULL;
2125 if (!found) {
a0d0e21e
LW		 2126 if (!SvOK(sv))
2127 return 0;
d83f0a82
NC		 2128#ifdef PERL_OLD_COPY_ON_WRITE
2129 if (SvIsCOW(lsv))
2130 sv_force_normal_flags(lsv, 0);
2131#endif
3881461a 2132 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 2133 NULL, 0);
a0d0e21e
LW		 2134 }
2135 else if (!SvOK(sv)) {
3881461a 2136 found->mg_len = -1;
a0d0e21e
LW		 2137 return 0;
2138 }
2139 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
2140
e1dccc0d 2141 pos = SvIV(sv);
a0ed51b3 2142
7e2040f0 2143 if (DO_UTF8(lsv)) {
a0ed51b3
LW		 2144 ulen = sv_len_utf8(lsv);
2145 if (ulen)
2146 len = ulen;
a0ed51b3
LW		 2147 }
2148
a0d0e21e
LW		 2149 if (pos < 0) {
2150 pos += len;
2151 if (pos < 0)
2152 pos = 0;
2153 }
eb160463 2154 else if (pos > (SSize_t)len)
a0d0e21e 2155 pos = len;
a0ed51b3
LW		 2156
2157 if (ulen) {
2158 I32 p = pos;
2159 sv_pos_u2b(lsv, &p, 0);
2160 pos = p;
2161 }
727405f8 2162
3881461a
AL		 2163 found->mg_len = pos;
2164 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 2165
79072805
LW		 2166 return 0;
2167}
2168
2169int
864dbfa3 2170Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS		 2171{
2172 STRLEN len;
35a4481c 2173 SV * const lsv = LvTARG(sv);
b83604b4 2174 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB		 2175 STRLEN offs = LvTARGOFF(sv);
2176 STRLEN rem = LvTARGLEN(sv);
83f78d1a
FC		 2177 const bool negoff = LvFLAGS(sv) & 1;
2178 const bool negrem = LvFLAGS(sv) & 2;
7918f24d
NC		 2179
2180 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2181 PERL_UNUSED_ARG(mg);
6ff81951 2182
83f78d1a
FC		 2183 if (!translate_substr_offsets(
2184 SvUTF8(lsv) ? sv_len_utf8(lsv) : len,
2185 negoff ? -(IV)offs : (IV)offs, !negoff,
2186 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2187 )) {
2188 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2189 sv_setsv_nomg(sv, &PL_sv_undef);
2190 return 0;
2191 }
2192
9aa983d2 2193 if (SvUTF8(lsv))
d931b1be 2194 offs = sv_pos_u2b_flags(lsv, offs, &rem, SV_CONST_RETURN);
1c900557 2195 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2196 if (SvUTF8(lsv))
2ef4b674 2197 SvUTF8_on(sv);
6ff81951
GS		 2198 return 0;
2199}
2200
2201int
864dbfa3 2202Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2203{
97aff369 2204 dVAR;
83f78d1a 2205 STRLEN len, lsv_len, oldtarglen, newtarglen;
5fcbf73d 2206 const char * const tmps = SvPV_const(sv, len);
dd374669 2207 SV * const lsv = LvTARG(sv);
777f7c56
EB		 2208 STRLEN lvoff = LvTARGOFF(sv);
2209 STRLEN lvlen = LvTARGLEN(sv);
83f78d1a
FC		 2210 const bool negoff = LvFLAGS(sv) & 1;
2211 const bool neglen = LvFLAGS(sv) & 2;
7918f24d
NC		 2212
2213 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2214 PERL_UNUSED_ARG(mg);
075a4a2b 2215
a74fb2cd
FC		 2216 SvGETMAGIC(lsv);
2217 if (SvROK(lsv))
2218 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2219 "Attempt to use reference as lvalue in substr"
2220 );
83f78d1a
FC		 2221 if (SvUTF8(lsv)) lsv_len = sv_len_utf8(lsv);
2222 else (void)SvPV_nomg(lsv,lsv_len);
2223 if (!translate_substr_offsets(
2224 lsv_len,
2225 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2226 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2227 ))
2228 Perl_croak(aTHX_ "substr outside of string");
2229 oldtarglen = lvlen;
1aa99e6b 2230 if (DO_UTF8(sv)) {
9aa983d2 2231 sv_utf8_upgrade(lsv);
d931b1be 2232 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
a74fb2cd 2233 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2234 newtarglen = sv_len_utf8(sv);
9aa983d2
JH		 2235 SvUTF8_on(lsv);
2236 }
9bf12eaf 2237 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2238 const char *utf8;
d931b1be 2239 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
83f78d1a 2240 newtarglen = len;
5fcbf73d 2241 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
a74fb2cd 2242 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
5fcbf73d 2243 Safefree(utf8);
1aa99e6b 2244 }
b76f3ce2 2245 else {
a74fb2cd 2246 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2247 newtarglen = len;
b76f3ce2 2248 }
83f78d1a
FC		 2249 if (!neglen) LvTARGLEN(sv) = newtarglen;
2250 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
b76f3ce2 2251
79072805
LW		 2252 return 0;
2253}
2254
2255int
864dbfa3 2256Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2257{
97aff369 2258 dVAR;
7918f24d
NC		 2259
2260 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2261 PERL_UNUSED_ARG(sv);
7918f24d 2262
27cc343c 2263 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW		 2264 return 0;
2265}
2266
2267int
864dbfa3 2268Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2269{
97aff369 2270 dVAR;
7918f24d
NC		 2271
2272 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2273 PERL_UNUSED_ARG(sv);
7918f24d 2274
b01e650a
DM		 2275 /* update taint status */
2276 if (PL_tainted)
2277 mg->mg_len |= 1;
2278 else
2279 mg->mg_len &= ~1;
463ee0b2
LW		 2280 return 0;
2281}
2282
2283int
864dbfa3 2284Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2285{
35a4481c 2286 SV * const lsv = LvTARG(sv);
7918f24d
NC		 2287
2288 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2289 PERL_UNUSED_ARG(mg);
6ff81951 2290
6136c704
AL		 2291 if (lsv)
2292 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2293 else
0c34ef67 2294 SvOK_off(sv);
6ff81951 2295
6ff81951
GS		 2296 return 0;
2297}
2298
2299int
864dbfa3 2300Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2301{
7918f24d 2302 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2303 PERL_UNUSED_ARG(mg);
79072805
LW		 2304 do_vecset(sv); /* XXX slurp this routine */
2305 return 0;
2306}
2307
2308int
1e6bda93
FC		 2309Perl_magic_setvstring(pTHX_ SV *sv, MAGIC *mg)
2310{
2311 PERL_ARGS_ASSERT_MAGIC_SETVSTRING;
2312
2313 if (SvPOKp(sv)) {
2314 SV * const vecsv = sv_newmortal();
2315 scan_vstring(mg->mg_ptr, mg->mg_ptr + mg->mg_len, vecsv);
2316 if (sv_eq_flags(vecsv, sv, 0 /*nomg*/)) return 0;
2317 }
2318 return sv_unmagic(sv, mg->mg_type);
2319}
2320
2321int
864dbfa3 2322Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2323{
97aff369 2324 dVAR;
a0714e2c 2325 SV *targ = NULL;
7918f24d
NC		 2326
2327 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2328
5f05dabc 2329 if (LvTARGLEN(sv)) {
68dc0745 2330 if (mg->mg_obj) {
8772537c 2331 SV * const ahv = LvTARG(sv);
85fbaab2 2332 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
6d822dc4
MS		 2333 if (he)
2334 targ = HeVAL(he);
68dc0745 2335 }
2336 else {
502c6561 2337 AV *const av = MUTABLE_AV(LvTARG(sv));
68dc0745 2338 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2339 targ = AvARRAY(av)[LvTARGOFF(sv)];
2340 }
46da273f 2341 if (targ && (targ != &PL_sv_undef)) {
68dc0745 2342 /* somebody else defined it for us */
2343 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2344 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745 2345 LvTARGLEN(sv) = 0;
2346 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2347 mg->mg_obj = NULL;
68dc0745 2348 mg->mg_flags &= ~MGf_REFCOUNTED;
2349 }
5f05dabc 2350 }
71be2cbc 2351 else
2352 targ = LvTARG(sv);
3280af22 2353 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc 2354 return 0;
2355}
2356
2357int
864dbfa3 2358Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2359{
7918f24d 2360 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2361 PERL_UNUSED_ARG(mg);
71be2cbc 2362 if (LvTARGLEN(sv))
68dc0745 2363 vivify_defelem(sv);
2364 if (LvTARG(sv)) {
5f05dabc 2365 sv_setsv(LvTARG(sv), sv);
68dc0745 2366 SvSETMAGIC(LvTARG(sv));
2367 }
5f05dabc 2368 return 0;
2369}
2370
71be2cbc 2371void
864dbfa3 2372Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2373{
97aff369 2374 dVAR;
74e13ce4 2375 MAGIC *mg;
a0714e2c 2376 SV *value = NULL;
71be2cbc 2377
7918f24d
NC		 2378 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2379
14befaf4 2380 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2381 return;
68dc0745 2382 if (mg->mg_obj) {
8772537c 2383 SV * const ahv = LvTARG(sv);
85fbaab2 2384 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS		 2385 if (he)
2386 value = HeVAL(he);
3280af22 2387 if (!value || value == &PL_sv_undef)
be2597df 2388 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2389 }
68dc0745 2390 else {
502c6561 2391 AV *const av = MUTABLE_AV(LvTARG(sv));
5aabfad6 2392 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2393 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2394 else {
d4c19fe8 2395 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2396 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2397 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745 2398 }
2399 }
b37c2d43 2400 SvREFCNT_inc_simple_void(value);
68dc0745 2401 SvREFCNT_dec(LvTARG(sv));
2402 LvTARG(sv) = value;
71be2cbc 2403 LvTARGLEN(sv) = 0;
68dc0745 2404 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2405 mg->mg_obj = NULL;
68dc0745 2406 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc 2407}
2408
2409int
864dbfa3 2410Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2411{
7918f24d 2412 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
5648c0ae
DM		 2413 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2414 return 0;
810b8aa5
GS		 2415}
2416
2417int
864dbfa3 2418Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2419{
7918f24d 2420 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2421 PERL_UNUSED_CONTEXT;
0177730e 2422 PERL_UNUSED_ARG(sv);
565764a8 2423 mg->mg_len = -1;
93a17b20
LW		 2424 return 0;
2425}
2426
2427int
864dbfa3 2428Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2429{
35a4481c 2430 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2431
7918f24d
NC		 2432 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2433
79072805 2434 if (uf && uf->uf_set)
24f81a43 2435 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW		 2436 return 0;
2437}
2438
c277df42 2439int
faf82a0b
AE		 2440Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2441{
488344d2 2442 const char type = mg->mg_type;
7918f24d
NC		 2443
2444 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2445
488344d2
NC		 2446 if (type == PERL_MAGIC_qr) {
2447 } else if (type == PERL_MAGIC_bm) {
2448 SvTAIL_off(sv);
2449 SvVALID_off(sv);
2450 } else {
2451 assert(type == PERL_MAGIC_fm);
488344d2
NC		 2452 }
2453 return sv_unmagic(sv, type);
faf82a0b
AE		 2454}
2455
7a4c00b4 2456#ifdef USE_LOCALE_COLLATE
79072805 2457int
864dbfa3 2458Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2459{
7918f24d
NC		 2460 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2461
bbce6d69 2462 /*
838b5b74 2463 * RenE<eacute> Descartes said "I think not."
bbce6d69 2464 * and vanished with a faint plop.
2465 */
96a5add6 2466 PERL_UNUSED_CONTEXT;
8772537c 2467 PERL_UNUSED_ARG(sv);
7a4c00b4 2468 if (mg->mg_ptr) {
2469 Safefree(mg->mg_ptr);
2470 mg->mg_ptr = NULL;
565764a8 2471 mg->mg_len = -1;
7a4c00b4 2472 }
bbce6d69 2473 return 0;
2474}
7a4c00b4 2475#endif /* USE_LOCALE_COLLATE */
bbce6d69 2476
7e8c5dac
HS		 2477/* Just clear the UTF-8 cache data. */
2478int
2479Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2480{
7918f24d 2481 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2482 PERL_UNUSED_CONTEXT;
8772537c 2483 PERL_UNUSED_ARG(sv);
7e8c5dac 2484 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2485 mg->mg_ptr = NULL;
7e8c5dac
HS		 2486 mg->mg_len = -1; /* The mg_len holds the len cache. */
2487 return 0;
2488}
2489
bbce6d69 2490int
864dbfa3 2491Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2492{
97aff369 2493 dVAR;
e1ec3a88 2494 register const char *s;
2fdbfb4d
AB		 2495 register I32 paren;
2496 register const REGEXP * rx;
2497 const char * const remaining = mg->mg_ptr + 1;
79072805 2498 I32 i;
8990e307 2499 STRLEN len;
125b9982 2500 MAGIC *tmg;
2fdbfb4d 2501
7918f24d
NC		 2502 PERL_ARGS_ASSERT_MAGIC_SET;
2503
79072805 2504 switch (*mg->mg_ptr) {
2fdbfb4d
AB		 2505 case '\015': /* $^MATCH */
2506 if (strEQ(remaining, "ATCH"))
2507 goto do_match;
2508 case '`': /* ${^PREMATCH} caught below */
2509 do_prematch:
f1b875a0 2510 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB		 2511 goto setparen;
2512 case '\'': /* ${^POSTMATCH} caught below */
2513 do_postmatch:
f1b875a0 2514 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB		 2515 goto setparen;
2516 case '&':
2517 do_match:
f1b875a0 2518 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB		 2519 goto setparen;
2520 case '1': case '2': case '3': case '4':
2521 case '5': case '6': case '7': case '8': case '9':
104a8018 2522 paren = atoi(mg->mg_ptr);
2fdbfb4d 2523 setparen:
1e05feb3 2524 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9bad346 2525 setparen_got_rx:
2fdbfb4d 2526 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
1e05feb3 2527 } else {
2fdbfb4d
AB		 2528 /* Croak with a READONLY error when a numbered match var is
2529 * set without a previous pattern match. Unless it's C<local $1>
2530 */
d9bad346 2531 croakparen:
2fdbfb4d 2532 if (!PL_localizing) {
6ad8f254 2533 Perl_croak_no_modify(aTHX);
2fdbfb4d
AB		 2534 }
2535 }
9b9e0be4 2536 break;
748a9306 2537 case '\001': /* ^A */
3280af22 2538 sv_setsv(PL_bodytarget, sv);
64eff8b7
DM		 2539 FmLINES(PL_bodytarget) = 0;
2540 if (SvPOK(PL_bodytarget)) {
2541 char *s = SvPVX(PL_bodytarget);
2542 while ( ((s = strchr(s, '\n'))) ) {
2543 FmLINES(PL_bodytarget)++;
2544 s++;
2545 }
2546 }
125b9982
NT		 2547 /* mg_set() has temporarily made sv non-magical */
2548 if (PL_tainting) {
2549 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2550 SvTAINTED_on(PL_bodytarget);
2551 else
2552 SvTAINTED_off(PL_bodytarget);
2553 }
748a9306 2554 break;
49460fe6 2555 case '\003': /* ^C */
f2338a2e 2556 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS		 2557 break;
2558
79072805 2559 case '\004': /* ^D */
b4ab917c 2560#ifdef DEBUGGING
b83604b4 2561 s = SvPV_nolen_const(sv);
ddcf8bc1 2562 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS		 2563 if (DEBUG_x_TEST || DEBUG_B_TEST)
2564 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2565#else
38ab35f8 2566 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2567#endif
79072805 2568 break;
28f23441 2569 case '\005': /* ^E */
d0063567 2570 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2571#ifdef VMS
38ab35f8 2572 set_vaxc_errno(SvIV(sv));
e37778c2
NC		 2573#else
2574# ifdef WIN32
d0063567 2575 SetLastError( SvIV(sv) );
e37778c2
NC		 2576# else
2577# ifdef OS2
38ab35f8 2578 os2_setsyserrno(SvIV(sv));
e37778c2 2579# else
d0063567 2580 /* will anyone ever use this? */
38ab35f8 2581 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ		 2582# endif
2583# endif
22fae026 2584#endif
d0063567
DK		 2585 }
2586 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2587 SvREFCNT_dec(PL_encoding);
d0063567
DK		 2588 if (SvOK(sv) || SvGMAGICAL(sv)) {
2589 PL_encoding = newSVsv(sv);
2590 }
2591 else {
a0714e2c 2592 PL_encoding = NULL;
d0063567
DK		 2593 }
2594 }
2595 break;
79072805 2596 case '\006': /* ^F */
38ab35f8 2597 PL_maxsysfd = SvIV(sv);
79072805 2598 break;
a0d0e21e 2599 case '\010': /* ^H */
38ab35f8 2600 PL_hints = SvIV(sv);
a0d0e21e 2601 break;
9d116dd7 2602 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2603 Safefree(PL_inplace);
bd61b366 2604 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2605 break;
d9bad346
FC		 2606 case '\016': /* ^N */
2607 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2608 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2609 goto croakparen;
28f23441 2610 case '\017': /* ^O */
ac27b0f5 2611 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2612 Safefree(PL_osname);
bd61b366 2613 PL_osname = NULL;
3511154c
DM		 2614 if (SvOK(sv)) {
2615 TAINT_PROPER("assigning to $^O");
2e0de35c 2616 PL_osname = savesvpv(sv);
3511154c 2617 }
ac27b0f5
NIS		 2618 }
2619 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC		 2620 STRLEN len;
2621 const char *const start = SvPV(sv, len);
b54fc2b6 2622 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2623 SV *tmp;
8b850bd5
NC		 2624
2625
2626 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2627 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC		 2628
2629 /* Opening for input is more common than opening for output, so
2630 ensure that hints for input are sooner on linked list. */
59cd0e26 2631 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z		 2632 SvUTF8(sv))
2633 : newSVpvs_flags("", SvUTF8(sv));
2634 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2635 mg_set(tmp);
8b850bd5 2636
f747ebd6
Z		 2637 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2638 SvUTF8(sv));
2639 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2640 mg_set(tmp);
ac27b0f5 2641 }
28f23441 2642 break;
79072805 2643 case '\020': /* ^P */
2fdbfb4d
AB		 2644 if (*remaining == '\0') { /* ^P */
2645 PL_perldb = SvIV(sv);
2646 if (PL_perldb && !PL_DBsingle)
2647 init_debugger();
2648 break;
2649 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2650 goto do_prematch;
2651 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2652 goto do_postmatch;
2653 }
9b9e0be4 2654 break;
79072805 2655 case '\024': /* ^T */
88e89b8a 2656#ifdef BIG_TIME
6b88bc9c 2657 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2658#else
38ab35f8 2659 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2660#endif
79072805 2661 break;
e07ea26a
NC		 2662 case '\025': /* ^UTF8CACHE */
2663 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2664 PL_utf8cache = (signed char) sv_2iv(sv);
2665 }
2666 break;
fde18df1 2667 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH		 2668 if (*(mg->mg_ptr+1) == '\0') {
2669 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2670 i = SvIV(sv);
ac27b0f5 2671 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2672 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2673 }
599cee73 2674 }
0a378802 2675 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2676 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
7e4f0450
FC		 2677 if (!SvPOK(sv)) {
2678 PL_compiling.cop_warnings = pWARN_STD;
d775746e
GS		 2679 break;
2680 }
f4fc7782 2681 {
b5477537 2682 STRLEN len, i;
d3a7d8c7 2683 int accumulate = 0 ;
f4fc7782 2684 int any_fatals = 0 ;
b83604b4 2685 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH		 2686 for (i = 0 ; i < len ; ++i) {
2687 accumulate |= ptr[i] ;
2688 any_fatals |= (ptr[i] & 0xAA) ;
2689 }
4243c432
NC		 2690 if (!accumulate) {
2691 if (!specialWARN(PL_compiling.cop_warnings))
2692 PerlMemShared_free(PL_compiling.cop_warnings);
2693 PL_compiling.cop_warnings = pWARN_NONE;
2694 }
72dc9ed5
NC		 2695 /* Yuck. I can't see how to abstract this: */
2696 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2697 WARN_ALL) && !any_fatals) {
4243c432
NC		 2698 if (!specialWARN(PL_compiling.cop_warnings))
2699 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH		 2700 PL_compiling.cop_warnings = pWARN_ALL;
2701 PL_dowarn |= G_WARN_ONCE ;
727405f8 2702 }
d3a7d8c7 2703 else {
72dc9ed5
NC		 2704 STRLEN len;
2705 const char *const p = SvPV_const(sv, len);
2706
2707 PL_compiling.cop_warnings
8ee4cf24 2708 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC		 2709 p, len);
2710
d3a7d8c7
GS		 2711 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2712 PL_dowarn |= G_WARN_ONCE ;
2713 }
f4fc7782 2714
d3a7d8c7 2715 }
4438c4b7 2716 }
971a9dd3 2717 }
79072805
LW		 2718 break;
2719 case '.':
3280af22
NIS		 2720 if (PL_localizing) {
2721 if (PL_localizing == 1)
7766f137 2722 SAVESPTR(PL_last_in_gv);
748a9306 2723 }
3280af22 2724 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2725 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW		 2726 break;
2727 case '^':
acbe1b9d
FC		 2728 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2729 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2730 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW		 2731 break;
2732 case '~':
acbe1b9d
FC		 2733 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2734 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2735 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW		 2736 break;
2737 case '=':
acbe1b9d 2738 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW		 2739 break;
2740 case '-':
acbe1b9d
FC		 2741 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2742 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
099be4f1 2743 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW		 2744 break;
2745 case '%':
acbe1b9d 2746 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW		 2747 break;
2748 case '|':
4b65379b 2749 {
099be4f1 2750 IO * const io = GvIO(PL_defoutgv);
720f287d
AB		 2751 if(!io)
2752 break;
38ab35f8 2753 if ((SvIV(sv)) == 0)
4b65379b
CS		 2754 IoFLAGS(io) &= ~IOf_FLUSH;
2755 else {
2756 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2757 PerlIO *ofp = IoOFP(io);
2758 if (ofp)
2759 (void)PerlIO_flush(ofp);
2760 IoFLAGS(io) |= IOf_FLUSH;
2761 }
2762 }
79072805
LW		 2763 }
2764 break;
79072805 2765 case '/':
3280af22 2766 SvREFCNT_dec(PL_rs);
8bfdd7d9 2767 PL_rs = newSVsv(sv);
79072805
LW		 2768 break;
2769 case '\\':
ef8d46e8 2770 SvREFCNT_dec(PL_ors_sv);
009c130f 2771 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2772 PL_ors_sv = newSVsv(sv);
009c130f 2773 }
e3c19b7b 2774 else {
a0714e2c 2775 PL_ors_sv = NULL;
e3c19b7b 2776 }
79072805 2777 break;
7d69d4a6
FC		 2778 case '[':
2779 if (SvIV(sv) != 0)
2780 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2781 break;
79072805 2782 case '?':
ff0cee69 2783#ifdef COMPLEX_STATUS
6b88bc9c 2784 if (PL_localizing == 2) {
41cb7b2b 2785 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS		 2786 PL_statusvalue = LvTARGOFF(sv);
2787 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69 2788 }
2789 else
2790#endif
2791#ifdef VMSISH_STATUS
2792 if (VMSISH_STATUS)
fb38d079 2793 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69 2794 else
2795#endif
38ab35f8 2796 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW		 2797 break;
2798 case '!':
93189314
JH		 2799 {
2800#ifdef VMS
2801# define PERL_VMS_BANG vaxc$errno
2802#else
2803# define PERL_VMS_BANG 0
2804#endif
91487cfc 2805 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH		 2806 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2807 }
79072805
LW		 2808 break;
2809 case '<':
985213f2
AB		 2810 {
2811 const IV new_uid = SvIV(sv);
2812 PL_delaymagic_uid = new_uid;
3280af22
NIS		 2813 if (PL_delaymagic) {
2814 PL_delaymagic |= DM_RUID;
79072805
LW		 2815 break; /* don't do magic till later */
2816 }
2817#ifdef HAS_SETRUID
985213f2 2818 (void)setruid((Uid_t)new_uid);
79072805
LW		 2819#else
2820#ifdef HAS_SETREUID
985213f2 2821 (void)setreuid((Uid_t)new_uid, (Uid_t)-1);
748a9306 2822#else
85e6fe83 2823#ifdef HAS_SETRESUID
985213f2 2824 (void)setresuid((Uid_t)new_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2825#else
985213f2 2826 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
75870ed3 2827#ifdef PERL_DARWIN
2828 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
985213f2 2829 if (new_uid != 0 && PerlProc_getuid() == 0)
75870ed3 2830 (void)PerlProc_setuid(0);
2831#endif
985213f2 2832 (void)PerlProc_setuid(new_uid);
75870ed3 2833 } else {
cea2e8a9 2834 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2835 }
79072805
LW		 2836#endif
2837#endif
85e6fe83 2838#endif
79072805 2839 break;
985213f2 2840 }
79072805 2841 case '>':
985213f2
AB		 2842 {
2843 const UV new_euid = SvIV(sv);
2844 PL_delaymagic_euid = new_euid;
3280af22
NIS		 2845 if (PL_delaymagic) {
2846 PL_delaymagic |= DM_EUID;
79072805
LW		 2847 break; /* don't do magic till later */
2848 }
2849#ifdef HAS_SETEUID
985213f2 2850 (void)seteuid((Uid_t)new_euid);
79072805
LW		 2851#else
2852#ifdef HAS_SETREUID
985213f2 2853 (void)setreuid((Uid_t)-1, (Uid_t)new_euid);
85e6fe83
LW		 2854#else
2855#ifdef HAS_SETRESUID
985213f2 2856 (void)setresuid((Uid_t)-1, (Uid_t)new_euid, (Uid_t)-1);
79072805 2857#else
985213f2 2858 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
382669a9 2859 PerlProc_setuid(new_euid);
a0d0e21e 2860 else {
cea2e8a9 2861 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2862 }
79072805
LW		 2863#endif
2864#endif
85e6fe83 2865#endif
79072805 2866 break;
985213f2 2867 }
79072805 2868 case '(':
985213f2
AB		 2869 {
2870 const UV new_gid = SvIV(sv);
2871 PL_delaymagic_gid = new_gid;
3280af22
NIS		 2872 if (PL_delaymagic) {
2873 PL_delaymagic |= DM_RGID;
79072805
LW		 2874 break; /* don't do magic till later */
2875 }
2876#ifdef HAS_SETRGID
985213f2 2877 (void)setrgid((Gid_t)new_gid);
79072805
LW		 2878#else
2879#ifdef HAS_SETREGID
985213f2 2880 (void)setregid((Gid_t)new_gid, (Gid_t)-1);
85e6fe83
LW		 2881#else
2882#ifdef HAS_SETRESGID
985213f2 2883 (void)setresgid((Gid_t)new_gid, (Gid_t)-1, (Gid_t) -1);
79072805 2884#else
985213f2
AB		 2885 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2886 (void)PerlProc_setgid(new_gid);
748a9306 2887 else {
cea2e8a9 2888 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2889 }
79072805
LW		 2890#endif
2891#endif
85e6fe83 2892#endif
79072805 2893 break;
985213f2 2894 }
79072805 2895 case ')':
985213f2
AB		 2896 {
2897 UV new_egid;
5cd24f17 2898#ifdef HAS_SETGROUPS
2899 {
b83604b4 2900 const char *p = SvPV_const(sv, len);
757f63d8 2901 Groups_t *gary = NULL;
fb4089e0 2902#ifdef _SC_NGROUPS_MAX
2903 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2904
2905 if (maxgrp < 0)
2906 maxgrp = NGROUPS;
2907#else
2908 int maxgrp = NGROUPS;
2909#endif
757f63d8
SP		 2910
2911 while (isSPACE(*p))
2912 ++p;
985213f2 2913 new_egid = Atol(p);
fb4089e0 2914 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP		 2915 while (*p && !isSPACE(*p))
2916 ++p;
2917 while (isSPACE(*p))
2918 ++p;
2919 if (!*p)
2920 break;
2921 if(!gary)
2922 Newx(gary, i + 1, Groups_t);
2923 else
2924 Renew(gary, i + 1, Groups_t);
2925 gary[i] = Atol(p);
2926 }
2927 if (i)
2928 (void)setgroups(i, gary);
f5a63d97 2929 Safefree(gary);
5cd24f17 2930 }
2931#else /* HAS_SETGROUPS */
985213f2 2932 new_egid = SvIV(sv);
5cd24f17 2933#endif /* HAS_SETGROUPS */
985213f2 2934 PL_delaymagic_egid = new_egid;
3280af22
NIS		 2935 if (PL_delaymagic) {
2936 PL_delaymagic |= DM_EGID;
79072805
LW		 2937 break; /* don't do magic till later */
2938 }
2939#ifdef HAS_SETEGID
985213f2 2940 (void)setegid((Gid_t)new_egid);
79072805
LW		 2941#else
2942#ifdef HAS_SETREGID
985213f2 2943 (void)setregid((Gid_t)-1, (Gid_t)new_egid);
85e6fe83
LW		 2944#else
2945#ifdef HAS_SETRESGID
985213f2 2946 (void)setresgid((Gid_t)-1, (Gid_t)new_egid, (Gid_t)-1);
79072805 2947#else
985213f2
AB		 2948 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2949 (void)PerlProc_setgid(new_egid);
748a9306 2950 else {
cea2e8a9 2951 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2952 }
79072805
LW		 2953#endif
2954#endif
85e6fe83 2955#endif
79072805 2956 break;
985213f2 2957 }
79072805 2958 case ':':
2d8e6c8d 2959 PL_chopset = SvPV_force(sv,len);
79072805 2960 break;
9cdac2a2
FC		 2961 case '$': /* $$ */
2962 /* Store the pid in mg->mg_obj so we can tell when a fork has
2963 occurred. mg->mg_obj points to *$ by default, so clear it. */
2964 if (isGV(mg->mg_obj)) {
2965 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2966 SvREFCNT_dec(mg->mg_obj);
2967 mg->mg_flags |= MGf_REFCOUNTED;
2968 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2969 }
2970 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2971 break;
79072805 2972 case '0':
e2975953 2973 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS		 2974#ifdef HAS_SETPROCTITLE
2975 /* The BSDs don't show the argv[] in ps(1) output, they
2976 * show a string from the process struct and provide
2977 * the setproctitle() routine to manipulate that. */
a2722ac9 2978 if (PL_origalen != 1) {
b83604b4 2979 s = SvPV_const(sv, len);
98b76f99 2980# if __FreeBSD_version > 410001
9aad2c0e 2981 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS		 2982 * but not the "(perl) suffix from the ps(1)
2983 * output, because that's what ps(1) shows if the
2984 * argv[] is modified. */
6f2ad931 2985 setproctitle("-%s", s);
9aad2c0e 2986# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS		 2987 /* This doesn't really work if you assume that
2988 * $0 = 'foobar'; will wipe out 'perl' from the $0
2989 * because in ps(1) output the result will be like
2990 * sprintf("perl: %s (perl)", s)
2991 * I guess this is a security feature:
2992 * one (a user process) cannot get rid of the original name.
2993 * --jhi */
2994 setproctitle("%s", s);
2995# endif
2996 }
9d3968b2 2997#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2998 if (PL_origalen != 1) {
17aa7f3d 2999 union pstun un;
b83604b4 3000 s = SvPV_const(sv, len);
6867be6d 3001 un.pst_command = (char *)s;
17aa7f3d
JH		 3002 pstat(PSTAT_SETCMD, un, len, 0, 0);
3003 }
9d3968b2 3004#else
2d2af554
GA		 3005 if (PL_origalen > 1) {
3006 /* PL_origalen is set in perl_parse(). */
3007 s = SvPV_force(sv,len);
3008 if (len >= (STRLEN)PL_origalen-1) {
3009 /* Longer than original, will be truncated. We assume that
3010 * PL_origalen bytes are available. */
3011 Copy(s, PL_origargv[0], PL_origalen-1, char);
3012 }
3013 else {
3014 /* Shorter than original, will be padded. */
235ac35d 3015#ifdef PERL_DARWIN
60777a0d
JH		 3016 /* Special case for Mac OS X: see [perl #38868] */
3017 const int pad = 0;
235ac35d 3018#else
8a89a4f1
MB		 3019 /* Is the space counterintuitive? Yes.
3020 * (You were expecting \0?)
3021 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3022 * --jhi */
60777a0d 3023 const int pad = ' ';
235ac35d 3024#endif
60777a0d
JH		 3025 Copy(s, PL_origargv[0], len, char);
3026 PL_origargv[0][len] = 0;
3027 memset(PL_origargv[0] + len + 1,
3028 pad, PL_origalen - len - 1);
2d2af554
GA		 3029 }
3030 PL_origargv[0][PL_origalen-1] = 0;
3031 for (i = 1; i < PL_origargc; i++)
3032 PL_origargv[i] = 0;
7636ea95
AB		 3033#ifdef HAS_PRCTL_SET_NAME
3034 /* Set the legacy process name in addition to the POSIX name on Linux */
3035 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3036 /* diag_listed_as: SKIPME */
3037 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3038 }
3039#endif
79072805 3040 }
9d3968b2 3041#endif
e2975953 3042 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW		 3043 break;
3044 }
3045 return 0;
3046}
3047
3048I32
84c7b88c
BF		 3049Perl_whichsig_sv(pTHX_ SV *sigsv)
3050{
3051 const char *sigpv;
3052 STRLEN siglen;
3053 PERL_ARGS_ASSERT_WHICHSIG_SV;
3054 PERL_UNUSED_CONTEXT;
3055 sigpv = SvPV_const(sigsv, siglen);
3056 return whichsig_pvn(sigpv, siglen);
3057}
3058
3059I32
3060Perl_whichsig_pv(pTHX_ const char *sig)
3061{
3062 PERL_ARGS_ASSERT_WHICHSIG_PV;
3063 PERL_UNUSED_CONTEXT;
3064 return whichsig_pvn(sig, strlen(sig));
3065}
3066
3067I32
3068Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
79072805 3069{
aadb217d 3070 register char* const* sigv;
7918f24d 3071
84c7b88c 3072 PERL_ARGS_ASSERT_WHICHSIG_PVN;
96a5add6 3073 PERL_UNUSED_CONTEXT;
79072805 3074
aadb217d 3075 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
84c7b88c 3076 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
aadb217d 3077 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805 3078#ifdef SIGCLD
84c7b88c 3079 if (memEQs(sig, len, "CHLD"))
79072805
LW		 3080 return SIGCLD;
3081#endif
3082#ifdef SIGCHLD
84c7b88c 3083 if (memEQs(sig, len, "CLD"))
79072805
LW		 3084 return SIGCHLD;
3085#endif
7f1236c0 3086 return -1;
79072805
LW		 3087}
3088
ecfc5424 3089Signal_t
1e82f5a6 3090#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3091Perl_sighandler(int sig, siginfo_t *sip, void *uap)
1e82f5a6
SH		 3092#else
3093Perl_sighandler(int sig)
3094#endif
79072805 3095{
1018e26f
NIS		 3096#ifdef PERL_GET_SIG_CONTEXT
3097 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 3098#else
cea2e8a9 3099 dTHX;
71d280e3 3100#endif
79072805 3101 dSP;
a0714e2c
SS		 3102 GV *gv = NULL;
3103 SV *sv = NULL;
8772537c 3104 SV * const tSv = PL_Sv;
601f1833 3105 CV *cv = NULL;
533c011a 3106 OP *myop = PL_op;
84902520 3107 U32 flags = 0;
8772537c 3108 XPV * const tXpv = PL_Xpv;
0c4d3b5e 3109 I32 old_ss_ix = PL_savestack_ix;
71d280e3 3110
84902520 3111
727405f8 3112 if (!PL_psig_ptr[sig]) {
99ef548b 3113 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS		 3114 PL_sig_name[sig]);
3115 exit(sig);
3116 }
ff0cee69 3117
a0d63a7b
DM		 3118 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3119 /* Max number of items pushed there is 3*n or 4. We cannot fix
3120 infinity, so we fix 4 (in fact 5): */
3121 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3122 flags |= 1;
3123 PL_savestack_ix += 5; /* Protect save in progress. */
3124 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3125 }
84902520 3126 }
84902520 3127 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 3128 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL		 3129 || SvTYPE(cv) != SVt_PVCV) {
3130 HV *st;
f2c0649b 3131 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 3132 }
84902520 3133
a0d0e21e 3134 if (!cv || !CvROOT(cv)) {
a2a5de95
NC		 3135 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3136 PL_sig_name[sig], (gv ? GvENAME(gv)
3137 : ((cv && CvGV(cv))
3138 ? GvENAME(CvGV(cv))
3139 : "__ANON__")));
00d579c5 3140 goto cleanup;
79072805
LW		 3141 }
3142
0c4d3b5e
DM		 3143 sv = PL_psig_name[sig]
3144 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3145 : newSVpv(PL_sig_name[sig],0);
72048cfe 3146 flags |= 8;
0c4d3b5e
DM		 3147 SAVEFREESV(sv);
3148
a0d63a7b
DM		 3149 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3150 /* make sure our assumption about the size of the SAVEs are correct:
3151 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3152 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3153 }
e336de0d 3154
e788e7d3 3155 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 3156 PUSHMARK(SP);
79072805 3157 PUSHs(sv);
8aad04aa
JH		 3158#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3159 {
3160 struct sigaction oact;
3161
3162 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH		 3163 if (sip) {
3164 HV *sih = newHV();
ad64d0ec 3165 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH		 3166 /* The siginfo fields signo, code, errno, pid, uid,
3167 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC		 3168 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3169 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 3170#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		 3171 hv_stores(sih, "errno", newSViv(sip->si_errno));
3172 hv_stores(sih, "status", newSViv(sip->si_status));
3173 hv_stores(sih, "uid", newSViv(sip->si_uid));
3174 hv_stores(sih, "pid", newSViv(sip->si_pid));
3175 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3176 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 3177#endif
8aad04aa 3178 EXTEND(SP, 2);
ad64d0ec 3179 PUSHs(rv);
22f1178f 3180 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 3181 }
b4552a27 3182
8aad04aa
JH		 3183 }
3184 }
3185#endif
79072805 3186 PUTBACK;
a0d0e21e 3187
ad64d0ec 3188 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 3189
d3acc0f7 3190 POPSTACK;
1b266415 3191 if (SvTRUE(ERRSV)) {
c22d665b 3192#ifndef PERL_MICRO
1b266415
NIS		 3193 /* Handler "died", for example to get out of a restart-able read().
3194 * Before we re-do that on its behalf re-enable the signal which was
3195 * blocked by the system when we entered.
3196 */
c22d665b 3197#ifdef HAS_SIGPROCMASK
d488af49 3198#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3199 if (sip || uap)
c22d665b
LT		 3200#endif
3201 {
3202 sigset_t set;
3203 sigemptyset(&set);
3204 sigaddset(&set,sig);
3205 sigprocmask(SIG_UNBLOCK, &set, NULL);
3206 }
3207#else
1b266415
NIS		 3208 /* Not clear if this will work */
3209 (void)rsignal(sig, SIG_IGN);
5c1546dc 3210 (void)rsignal(sig, PL_csighandlerp);
c22d665b
LT		 3211#endif
3212#endif /* !PERL_MICRO */
c5df3096 3213 die_sv(ERRSV);
1b266415 3214 }
00d579c5 3215cleanup:
0c4d3b5e
DM		 3216 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3217 PL_savestack_ix = old_ss_ix;
72048cfe 3218 if (flags & 8)
84902520 3219 SvREFCNT_dec(sv);
533c011a 3220 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3221
3280af22
NIS		 3222 PL_Sv = tSv; /* Restore global temporaries. */
3223 PL_Xpv = tXpv;
53bb94e2 3224 return;
79072805 3225}
4e35701f
NIS		 3226
3227
51371543 3228static void
8772537c 3229S_restore_magic(pTHX_ const void *p)
51371543 3230{
97aff369 3231 dVAR;
8772537c
AL		 3232 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3233 SV* const sv = mgs->mgs_sv;
150b625d 3234 bool bumped;
51371543
GS		 3235
3236 if (!sv)
3237 return;
3238
3239 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
3240 {
f8c7b90f 3241#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC		 3242 /* While magic was saved (and off) sv_setsv may well have seen
3243 this SV as a prime candidate for COW. */
3244 if (SvIsCOW(sv))
e424a81e 3245 sv_force_normal_flags(sv, 0);
f9701176
NC		 3246#endif
3247
f9c6fee5
CS		 3248 if (mgs->mgs_readonly)
3249 SvREADONLY_on(sv);
3250 if (mgs->mgs_magical)
3251 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS		 3252 else
3253 mg_magical(sv);
2b77b520
YST		 3254 if (SvGMAGICAL(sv)) {
3255 /* downgrade public flags to private,
3256 and discard any other private flags */
3257
10edeb5d
JH		 3258 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
3259 if (pubflags) {
3260 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
3261 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST		 3262 }
3263 }
51371543
GS		 3264 }
3265
150b625d 3266 bumped = mgs->mgs_bumped;
51371543
GS		 3267 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3268
3269 /* If we're still on top of the stack, pop us off. (That condition
3270 * will be satisfied if restore_magic was called explicitly, but *not*
3271 * if it's being called via leave_scope.)
3272 * The reason for doing this is that otherwise, things like sv_2cv()
3273 * may leave alloc gunk on the savestack, and some code
3274 * (e.g. sighandler) doesn't expect that...
3275 */
3276 if (PL_savestack_ix == mgs->mgs_ss_ix)
3277 {
1be36ce0
NC		 3278 UV popval = SSPOPUV;
3279 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3280 PL_savestack_ix -= 2;
1be36ce0
NC		 3281 popval = SSPOPUV;
3282 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3283 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543 3284 }
150b625d
DM		 3285 if (bumped) {
3286 if (SvREFCNT(sv) == 1) {
3287 /* We hold the last reference to this SV, which implies that the
3288 SV was deleted as a side effect of the routines we called.
3289 So artificially keep it alive a bit longer.
3290 We avoid turning on the TEMP flag, which can cause the SV's
3291 buffer to get stolen (and maybe other stuff). */
3292 int was_temp = SvTEMP(sv);
3293 sv_2mortal(sv);
3294 if (!was_temp) {
3295 SvTEMP_off(sv);
3296 }
3297 SvOK_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;
3402 PERL_UNUSED_ARG(name);
3403 PERL_UNUSED_ARG(namlen);
3404
3405 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3406 nmg = mg_find(nsv, mg->mg_type);
3407 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3408 nmg->mg_ptr = mg->mg_ptr;
3409 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3410 nmg->mg_flags |= MGf_REFCOUNTED;
3411 return 1;
3412}
3413
f747ebd6 3414/*
66610fdd
RGS		 3415 * Local variables:
3416 * c-indentation-style: bsd
3417 * c-basic-offset: 4
14d04a33 3418 * indent-tabs-mode: nil
66610fdd
RGS		 3419 * End:
3420 *
14d04a33 3421 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3422 */
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