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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 */
3565fbf3
VP		 2054#if IVSIZE == I32SIZE
2055 *((IV *) &(mg->mg_len)) = 0;
2056#else
83f29afa
VP		 2057 if (mg->mg_ptr)
2058 *((IV *) mg->mg_ptr) = 0;
3565fbf3 2059#endif
83f29afa
VP		 2060
2061 return 0;
2062}
2063
2064int
83bf042f
NC		 2065Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2066{
97aff369 2067 dVAR;
7918f24d
NC		 2068
2069 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 2070 PERL_UNUSED_ARG(sv);
7918f24d 2071
94f3782b
DM		 2072 /* during global destruction, mg_obj may already have been freed */
2073 if (PL_in_clean_all)
1ea47f64 2074 return 0;
94f3782b 2075
83bf042f
NC		 2076 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2077
2078 if (mg) {
2079 /* arylen scalar holds a pointer back to the array, but doesn't own a
2080 reference. Hence the we (the array) are about to go away with it
2081 still pointing at us. Clear its pointer, else it would be pointing
2082 at free memory. See the comment in sv_magic about reference loops,
2083 and why it can't own a reference to us. */
2084 mg->mg_obj = 0;
2085 }
a0d0e21e
LW		 2086 return 0;
2087}
2088
2089int
864dbfa3 2090Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2091{
97aff369 2092 dVAR;
16eb5365 2093 SV* const lsv = LvTARG(sv);
7918f24d
NC		 2094
2095 PERL_ARGS_ASSERT_MAGIC_GETPOS;
16eb5365 2096 PERL_UNUSED_ARG(mg);
ac27b0f5 2097
a0d0e21e 2098 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL		 2099 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
2100 if (found && found->mg_len >= 0) {
2101 I32 i = found->mg_len;
7e2040f0 2102 if (DO_UTF8(lsv))
a0ed51b3 2103 sv_pos_b2u(lsv, &i);
e1dccc0d 2104 sv_setiv(sv, i);
a0d0e21e
LW		 2105 return 0;
2106 }
2107 }
0c34ef67 2108 SvOK_off(sv);
a0d0e21e
LW		 2109 return 0;
2110}
2111
2112int
864dbfa3 2113Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2114{
97aff369 2115 dVAR;
16eb5365 2116 SV* const lsv = LvTARG(sv);
a0d0e21e
LW		 2117 SSize_t pos;
2118 STRLEN len;
c00206c8 2119 STRLEN ulen = 0;
53d44271 2120 MAGIC* found;
a0d0e21e 2121
7918f24d 2122 PERL_ARGS_ASSERT_MAGIC_SETPOS;
16eb5365 2123 PERL_UNUSED_ARG(mg);
ac27b0f5 2124
a0d0e21e 2125 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL		 2126 found = mg_find(lsv, PERL_MAGIC_regex_global);
2127 else
2128 found = NULL;
2129 if (!found) {
a0d0e21e
LW		 2130 if (!SvOK(sv))
2131 return 0;
d83f0a82
NC		 2132#ifdef PERL_OLD_COPY_ON_WRITE
2133 if (SvIsCOW(lsv))
2134 sv_force_normal_flags(lsv, 0);
2135#endif
3881461a 2136 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 2137 NULL, 0);
a0d0e21e
LW		 2138 }
2139 else if (!SvOK(sv)) {
3881461a 2140 found->mg_len = -1;
a0d0e21e
LW		 2141 return 0;
2142 }
2143 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
2144
e1dccc0d 2145 pos = SvIV(sv);
a0ed51b3 2146
7e2040f0 2147 if (DO_UTF8(lsv)) {
a0ed51b3
LW		 2148 ulen = sv_len_utf8(lsv);
2149 if (ulen)
2150 len = ulen;
a0ed51b3
LW		 2151 }
2152
a0d0e21e
LW		 2153 if (pos < 0) {
2154 pos += len;
2155 if (pos < 0)
2156 pos = 0;
2157 }
eb160463 2158 else if (pos > (SSize_t)len)
a0d0e21e 2159 pos = len;
a0ed51b3
LW		 2160
2161 if (ulen) {
2162 I32 p = pos;
2163 sv_pos_u2b(lsv, &p, 0);
2164 pos = p;
2165 }
727405f8 2166
3881461a
AL		 2167 found->mg_len = pos;
2168 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 2169
79072805
LW		 2170 return 0;
2171}
2172
2173int
864dbfa3 2174Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS		 2175{
2176 STRLEN len;
35a4481c 2177 SV * const lsv = LvTARG(sv);
b83604b4 2178 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB		 2179 STRLEN offs = LvTARGOFF(sv);
2180 STRLEN rem = LvTARGLEN(sv);
83f78d1a
FC		 2181 const bool negoff = LvFLAGS(sv) & 1;
2182 const bool negrem = LvFLAGS(sv) & 2;
7918f24d
NC		 2183
2184 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2185 PERL_UNUSED_ARG(mg);
6ff81951 2186
83f78d1a
FC		 2187 if (!translate_substr_offsets(
2188 SvUTF8(lsv) ? sv_len_utf8(lsv) : len,
2189 negoff ? -(IV)offs : (IV)offs, !negoff,
2190 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2191 )) {
2192 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2193 sv_setsv_nomg(sv, &PL_sv_undef);
2194 return 0;
2195 }
2196
9aa983d2 2197 if (SvUTF8(lsv))
d931b1be 2198 offs = sv_pos_u2b_flags(lsv, offs, &rem, SV_CONST_RETURN);
1c900557 2199 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2200 if (SvUTF8(lsv))
2ef4b674 2201 SvUTF8_on(sv);
6ff81951
GS		 2202 return 0;
2203}
2204
2205int
864dbfa3 2206Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2207{
97aff369 2208 dVAR;
83f78d1a 2209 STRLEN len, lsv_len, oldtarglen, newtarglen;
5fcbf73d 2210 const char * const tmps = SvPV_const(sv, len);
dd374669 2211 SV * const lsv = LvTARG(sv);
777f7c56
EB		 2212 STRLEN lvoff = LvTARGOFF(sv);
2213 STRLEN lvlen = LvTARGLEN(sv);
83f78d1a
FC		 2214 const bool negoff = LvFLAGS(sv) & 1;
2215 const bool neglen = LvFLAGS(sv) & 2;
7918f24d
NC		 2216
2217 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2218 PERL_UNUSED_ARG(mg);
075a4a2b 2219
a74fb2cd
FC		 2220 SvGETMAGIC(lsv);
2221 if (SvROK(lsv))
2222 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2223 "Attempt to use reference as lvalue in substr"
2224 );
83f78d1a
FC		 2225 if (SvUTF8(lsv)) lsv_len = sv_len_utf8(lsv);
2226 else (void)SvPV_nomg(lsv,lsv_len);
2227 if (!translate_substr_offsets(
2228 lsv_len,
2229 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2230 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2231 ))
2232 Perl_croak(aTHX_ "substr outside of string");
2233 oldtarglen = lvlen;
1aa99e6b 2234 if (DO_UTF8(sv)) {
9aa983d2 2235 sv_utf8_upgrade(lsv);
d931b1be 2236 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
a74fb2cd 2237 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2238 newtarglen = sv_len_utf8(sv);
9aa983d2
JH		 2239 SvUTF8_on(lsv);
2240 }
9bf12eaf 2241 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2242 const char *utf8;
d931b1be 2243 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
83f78d1a 2244 newtarglen = len;
5fcbf73d 2245 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
a74fb2cd 2246 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
5fcbf73d 2247 Safefree(utf8);
1aa99e6b 2248 }
b76f3ce2 2249 else {
a74fb2cd 2250 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2251 newtarglen = len;
b76f3ce2 2252 }
83f78d1a
FC		 2253 if (!neglen) LvTARGLEN(sv) = newtarglen;
2254 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
b76f3ce2 2255
79072805
LW		 2256 return 0;
2257}
2258
2259int
864dbfa3 2260Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2261{
97aff369 2262 dVAR;
7918f24d
NC		 2263
2264 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2265 PERL_UNUSED_ARG(sv);
7918f24d 2266
27cc343c 2267 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW		 2268 return 0;
2269}
2270
2271int
864dbfa3 2272Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2273{
97aff369 2274 dVAR;
7918f24d
NC		 2275
2276 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2277 PERL_UNUSED_ARG(sv);
7918f24d 2278
b01e650a
DM		 2279 /* update taint status */
2280 if (PL_tainted)
2281 mg->mg_len |= 1;
2282 else
2283 mg->mg_len &= ~1;
463ee0b2
LW		 2284 return 0;
2285}
2286
2287int
864dbfa3 2288Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2289{
35a4481c 2290 SV * const lsv = LvTARG(sv);
7918f24d
NC		 2291
2292 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2293 PERL_UNUSED_ARG(mg);
6ff81951 2294
6136c704
AL		 2295 if (lsv)
2296 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2297 else
0c34ef67 2298 SvOK_off(sv);
6ff81951 2299
6ff81951
GS		 2300 return 0;
2301}
2302
2303int
864dbfa3 2304Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2305{
7918f24d 2306 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2307 PERL_UNUSED_ARG(mg);
79072805
LW		 2308 do_vecset(sv); /* XXX slurp this routine */
2309 return 0;
2310}
2311
2312int
1e6bda93
FC		 2313Perl_magic_setvstring(pTHX_ SV *sv, MAGIC *mg)
2314{
2315 PERL_ARGS_ASSERT_MAGIC_SETVSTRING;
2316
2317 if (SvPOKp(sv)) {
2318 SV * const vecsv = sv_newmortal();
2319 scan_vstring(mg->mg_ptr, mg->mg_ptr + mg->mg_len, vecsv);
2320 if (sv_eq_flags(vecsv, sv, 0 /*nomg*/)) return 0;
2321 }
2322 return sv_unmagic(sv, mg->mg_type);
2323}
2324
2325int
864dbfa3 2326Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2327{
97aff369 2328 dVAR;
a0714e2c 2329 SV *targ = NULL;
7918f24d
NC		 2330
2331 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2332
5f05dabc 2333 if (LvTARGLEN(sv)) {
68dc0745 2334 if (mg->mg_obj) {
8772537c 2335 SV * const ahv = LvTARG(sv);
85fbaab2 2336 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
6d822dc4
MS		 2337 if (he)
2338 targ = HeVAL(he);
68dc0745 2339 }
2340 else {
502c6561 2341 AV *const av = MUTABLE_AV(LvTARG(sv));
68dc0745 2342 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2343 targ = AvARRAY(av)[LvTARGOFF(sv)];
2344 }
46da273f 2345 if (targ && (targ != &PL_sv_undef)) {
68dc0745 2346 /* somebody else defined it for us */
2347 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2348 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745 2349 LvTARGLEN(sv) = 0;
2350 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2351 mg->mg_obj = NULL;
68dc0745 2352 mg->mg_flags &= ~MGf_REFCOUNTED;
2353 }
5f05dabc 2354 }
71be2cbc 2355 else
2356 targ = LvTARG(sv);
3280af22 2357 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc 2358 return 0;
2359}
2360
2361int
864dbfa3 2362Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2363{
7918f24d 2364 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2365 PERL_UNUSED_ARG(mg);
71be2cbc 2366 if (LvTARGLEN(sv))
68dc0745 2367 vivify_defelem(sv);
2368 if (LvTARG(sv)) {
5f05dabc 2369 sv_setsv(LvTARG(sv), sv);
68dc0745 2370 SvSETMAGIC(LvTARG(sv));
2371 }
5f05dabc 2372 return 0;
2373}
2374
71be2cbc 2375void
864dbfa3 2376Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2377{
97aff369 2378 dVAR;
74e13ce4 2379 MAGIC *mg;
a0714e2c 2380 SV *value = NULL;
71be2cbc 2381
7918f24d
NC		 2382 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2383
14befaf4 2384 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2385 return;
68dc0745 2386 if (mg->mg_obj) {
8772537c 2387 SV * const ahv = LvTARG(sv);
85fbaab2 2388 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS		 2389 if (he)
2390 value = HeVAL(he);
3280af22 2391 if (!value || value == &PL_sv_undef)
be2597df 2392 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2393 }
68dc0745 2394 else {
502c6561 2395 AV *const av = MUTABLE_AV(LvTARG(sv));
5aabfad6 2396 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2397 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2398 else {
d4c19fe8 2399 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2400 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2401 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745 2402 }
2403 }
b37c2d43 2404 SvREFCNT_inc_simple_void(value);
68dc0745 2405 SvREFCNT_dec(LvTARG(sv));
2406 LvTARG(sv) = value;
71be2cbc 2407 LvTARGLEN(sv) = 0;
68dc0745 2408 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2409 mg->mg_obj = NULL;
68dc0745 2410 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc 2411}
2412
2413int
864dbfa3 2414Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2415{
7918f24d 2416 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
5648c0ae
DM		 2417 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2418 return 0;
810b8aa5
GS		 2419}
2420
2421int
864dbfa3 2422Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2423{
7918f24d 2424 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2425 PERL_UNUSED_CONTEXT;
0177730e 2426 PERL_UNUSED_ARG(sv);
565764a8 2427 mg->mg_len = -1;
93a17b20
LW		 2428 return 0;
2429}
2430
2431int
864dbfa3 2432Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2433{
35a4481c 2434 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2435
7918f24d
NC		 2436 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2437
79072805 2438 if (uf && uf->uf_set)
24f81a43 2439 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW		 2440 return 0;
2441}
2442
c277df42 2443int
faf82a0b
AE		 2444Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2445{
488344d2 2446 const char type = mg->mg_type;
7918f24d
NC		 2447
2448 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2449
488344d2
NC		 2450 if (type == PERL_MAGIC_qr) {
2451 } else if (type == PERL_MAGIC_bm) {
2452 SvTAIL_off(sv);
2453 SvVALID_off(sv);
2454 } else {
2455 assert(type == PERL_MAGIC_fm);
488344d2
NC		 2456 }
2457 return sv_unmagic(sv, type);
faf82a0b
AE		 2458}
2459
7a4c00b4 2460#ifdef USE_LOCALE_COLLATE
79072805 2461int
864dbfa3 2462Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2463{
7918f24d
NC		 2464 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2465
bbce6d69 2466 /*
838b5b74 2467 * RenE<eacute> Descartes said "I think not."
bbce6d69 2468 * and vanished with a faint plop.
2469 */
96a5add6 2470 PERL_UNUSED_CONTEXT;
8772537c 2471 PERL_UNUSED_ARG(sv);
7a4c00b4 2472 if (mg->mg_ptr) {
2473 Safefree(mg->mg_ptr);
2474 mg->mg_ptr = NULL;
565764a8 2475 mg->mg_len = -1;
7a4c00b4 2476 }
bbce6d69 2477 return 0;
2478}
7a4c00b4 2479#endif /* USE_LOCALE_COLLATE */
bbce6d69 2480
7e8c5dac
HS		 2481/* Just clear the UTF-8 cache data. */
2482int
2483Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2484{
7918f24d 2485 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2486 PERL_UNUSED_CONTEXT;
8772537c 2487 PERL_UNUSED_ARG(sv);
7e8c5dac 2488 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2489 mg->mg_ptr = NULL;
7e8c5dac
HS		 2490 mg->mg_len = -1; /* The mg_len holds the len cache. */
2491 return 0;
2492}
2493
bbce6d69 2494int
864dbfa3 2495Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2496{
97aff369 2497 dVAR;
e1ec3a88 2498 register const char *s;
2fdbfb4d
AB		 2499 register I32 paren;
2500 register const REGEXP * rx;
2501 const char * const remaining = mg->mg_ptr + 1;
79072805 2502 I32 i;
8990e307 2503 STRLEN len;
125b9982 2504 MAGIC *tmg;
2fdbfb4d 2505
7918f24d
NC		 2506 PERL_ARGS_ASSERT_MAGIC_SET;
2507
79072805 2508 switch (*mg->mg_ptr) {
2fdbfb4d
AB		 2509 case '\015': /* $^MATCH */
2510 if (strEQ(remaining, "ATCH"))
2511 goto do_match;
2512 case '`': /* ${^PREMATCH} caught below */
2513 do_prematch:
f1b875a0 2514 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB		 2515 goto setparen;
2516 case '\'': /* ${^POSTMATCH} caught below */
2517 do_postmatch:
f1b875a0 2518 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB		 2519 goto setparen;
2520 case '&':
2521 do_match:
f1b875a0 2522 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB		 2523 goto setparen;
2524 case '1': case '2': case '3': case '4':
2525 case '5': case '6': case '7': case '8': case '9':
104a8018 2526 paren = atoi(mg->mg_ptr);
2fdbfb4d 2527 setparen:
1e05feb3 2528 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9bad346 2529 setparen_got_rx:
2fdbfb4d 2530 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
1e05feb3 2531 } else {
2fdbfb4d
AB		 2532 /* Croak with a READONLY error when a numbered match var is
2533 * set without a previous pattern match. Unless it's C<local $1>
2534 */
d9bad346 2535 croakparen:
2fdbfb4d 2536 if (!PL_localizing) {
6ad8f254 2537 Perl_croak_no_modify(aTHX);
2fdbfb4d
AB		 2538 }
2539 }
9b9e0be4 2540 break;
748a9306 2541 case '\001': /* ^A */
3280af22 2542 sv_setsv(PL_bodytarget, sv);
64eff8b7
DM		 2543 FmLINES(PL_bodytarget) = 0;
2544 if (SvPOK(PL_bodytarget)) {
2545 char *s = SvPVX(PL_bodytarget);
2546 while ( ((s = strchr(s, '\n'))) ) {
2547 FmLINES(PL_bodytarget)++;
2548 s++;
2549 }
2550 }
125b9982
NT		 2551 /* mg_set() has temporarily made sv non-magical */
2552 if (PL_tainting) {
2553 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2554 SvTAINTED_on(PL_bodytarget);
2555 else
2556 SvTAINTED_off(PL_bodytarget);
2557 }
748a9306 2558 break;
49460fe6 2559 case '\003': /* ^C */
f2338a2e 2560 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS		 2561 break;
2562
79072805 2563 case '\004': /* ^D */
b4ab917c 2564#ifdef DEBUGGING
b83604b4 2565 s = SvPV_nolen_const(sv);
ddcf8bc1 2566 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS		 2567 if (DEBUG_x_TEST || DEBUG_B_TEST)
2568 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2569#else
38ab35f8 2570 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2571#endif
79072805 2572 break;
28f23441 2573 case '\005': /* ^E */
d0063567 2574 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2575#ifdef VMS
38ab35f8 2576 set_vaxc_errno(SvIV(sv));
e37778c2
NC		 2577#else
2578# ifdef WIN32
d0063567 2579 SetLastError( SvIV(sv) );
e37778c2
NC		 2580# else
2581# ifdef OS2
38ab35f8 2582 os2_setsyserrno(SvIV(sv));
e37778c2 2583# else
d0063567 2584 /* will anyone ever use this? */
38ab35f8 2585 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ		 2586# endif
2587# endif
22fae026 2588#endif
d0063567
DK		 2589 }
2590 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2591 SvREFCNT_dec(PL_encoding);
d0063567
DK		 2592 if (SvOK(sv) || SvGMAGICAL(sv)) {
2593 PL_encoding = newSVsv(sv);
2594 }
2595 else {
a0714e2c 2596 PL_encoding = NULL;
d0063567
DK		 2597 }
2598 }
2599 break;
79072805 2600 case '\006': /* ^F */
38ab35f8 2601 PL_maxsysfd = SvIV(sv);
79072805 2602 break;
a0d0e21e 2603 case '\010': /* ^H */
38ab35f8 2604 PL_hints = SvIV(sv);
a0d0e21e 2605 break;
9d116dd7 2606 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2607 Safefree(PL_inplace);
bd61b366 2608 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2609 break;
d9bad346
FC		 2610 case '\016': /* ^N */
2611 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2612 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2613 goto croakparen;
28f23441 2614 case '\017': /* ^O */
ac27b0f5 2615 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2616 Safefree(PL_osname);
bd61b366 2617 PL_osname = NULL;
3511154c
DM		 2618 if (SvOK(sv)) {
2619 TAINT_PROPER("assigning to $^O");
2e0de35c 2620 PL_osname = savesvpv(sv);
3511154c 2621 }
ac27b0f5
NIS		 2622 }
2623 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC		 2624 STRLEN len;
2625 const char *const start = SvPV(sv, len);
b54fc2b6 2626 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2627 SV *tmp;
8b850bd5
NC		 2628
2629
2630 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2631 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC		 2632
2633 /* Opening for input is more common than opening for output, so
2634 ensure that hints for input are sooner on linked list. */
59cd0e26 2635 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z		 2636 SvUTF8(sv))
2637 : newSVpvs_flags("", SvUTF8(sv));
2638 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2639 mg_set(tmp);
8b850bd5 2640
f747ebd6
Z		 2641 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2642 SvUTF8(sv));
2643 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2644 mg_set(tmp);
ac27b0f5 2645 }
28f23441 2646 break;
79072805 2647 case '\020': /* ^P */
2fdbfb4d
AB		 2648 if (*remaining == '\0') { /* ^P */
2649 PL_perldb = SvIV(sv);
2650 if (PL_perldb && !PL_DBsingle)
2651 init_debugger();
2652 break;
2653 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2654 goto do_prematch;
2655 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2656 goto do_postmatch;
2657 }
9b9e0be4 2658 break;
79072805 2659 case '\024': /* ^T */
88e89b8a 2660#ifdef BIG_TIME
6b88bc9c 2661 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2662#else
38ab35f8 2663 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2664#endif
79072805 2665 break;
e07ea26a
NC		 2666 case '\025': /* ^UTF8CACHE */
2667 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2668 PL_utf8cache = (signed char) sv_2iv(sv);
2669 }
2670 break;
fde18df1 2671 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH		 2672 if (*(mg->mg_ptr+1) == '\0') {
2673 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2674 i = SvIV(sv);
ac27b0f5 2675 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2676 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2677 }
599cee73 2678 }
0a378802 2679 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2680 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
7e4f0450
FC		 2681 if (!SvPOK(sv)) {
2682 PL_compiling.cop_warnings = pWARN_STD;
d775746e
GS		 2683 break;
2684 }
f4fc7782 2685 {
b5477537 2686 STRLEN len, i;
d3a7d8c7 2687 int accumulate = 0 ;
f4fc7782 2688 int any_fatals = 0 ;
b83604b4 2689 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH		 2690 for (i = 0 ; i < len ; ++i) {
2691 accumulate |= ptr[i] ;
2692 any_fatals |= (ptr[i] & 0xAA) ;
2693 }
4243c432
NC		 2694 if (!accumulate) {
2695 if (!specialWARN(PL_compiling.cop_warnings))
2696 PerlMemShared_free(PL_compiling.cop_warnings);
2697 PL_compiling.cop_warnings = pWARN_NONE;
2698 }
72dc9ed5
NC		 2699 /* Yuck. I can't see how to abstract this: */
2700 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2701 WARN_ALL) && !any_fatals) {
4243c432
NC		 2702 if (!specialWARN(PL_compiling.cop_warnings))
2703 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH		 2704 PL_compiling.cop_warnings = pWARN_ALL;
2705 PL_dowarn |= G_WARN_ONCE ;
727405f8 2706 }
d3a7d8c7 2707 else {
72dc9ed5
NC		 2708 STRLEN len;
2709 const char *const p = SvPV_const(sv, len);
2710
2711 PL_compiling.cop_warnings
8ee4cf24 2712 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC		 2713 p, len);
2714
d3a7d8c7
GS		 2715 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2716 PL_dowarn |= G_WARN_ONCE ;
2717 }
f4fc7782 2718
d3a7d8c7 2719 }
4438c4b7 2720 }
971a9dd3 2721 }
79072805
LW		 2722 break;
2723 case '.':
3280af22
NIS		 2724 if (PL_localizing) {
2725 if (PL_localizing == 1)
7766f137 2726 SAVESPTR(PL_last_in_gv);
748a9306 2727 }
3280af22 2728 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2729 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW		 2730 break;
2731 case '^':
acbe1b9d
FC		 2732 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2733 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2734 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW		 2735 break;
2736 case '~':
acbe1b9d
FC		 2737 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2738 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2739 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW		 2740 break;
2741 case '=':
acbe1b9d 2742 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW		 2743 break;
2744 case '-':
acbe1b9d
FC		 2745 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2746 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
099be4f1 2747 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW		 2748 break;
2749 case '%':
acbe1b9d 2750 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW		 2751 break;
2752 case '|':
4b65379b 2753 {
099be4f1 2754 IO * const io = GvIO(PL_defoutgv);
720f287d
AB		 2755 if(!io)
2756 break;
38ab35f8 2757 if ((SvIV(sv)) == 0)
4b65379b
CS		 2758 IoFLAGS(io) &= ~IOf_FLUSH;
2759 else {
2760 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2761 PerlIO *ofp = IoOFP(io);
2762 if (ofp)
2763 (void)PerlIO_flush(ofp);
2764 IoFLAGS(io) |= IOf_FLUSH;
2765 }
2766 }
79072805
LW		 2767 }
2768 break;
79072805 2769 case '/':
3280af22 2770 SvREFCNT_dec(PL_rs);
8bfdd7d9 2771 PL_rs = newSVsv(sv);
79072805
LW		 2772 break;
2773 case '\\':
ef8d46e8 2774 SvREFCNT_dec(PL_ors_sv);
009c130f 2775 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2776 PL_ors_sv = newSVsv(sv);
009c130f 2777 }
e3c19b7b 2778 else {
a0714e2c 2779 PL_ors_sv = NULL;
e3c19b7b 2780 }
79072805 2781 break;
7d69d4a6
FC		 2782 case '[':
2783 if (SvIV(sv) != 0)
2784 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2785 break;
79072805 2786 case '?':
ff0cee69 2787#ifdef COMPLEX_STATUS
6b88bc9c 2788 if (PL_localizing == 2) {
41cb7b2b 2789 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS		 2790 PL_statusvalue = LvTARGOFF(sv);
2791 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69 2792 }
2793 else
2794#endif
2795#ifdef VMSISH_STATUS
2796 if (VMSISH_STATUS)
fb38d079 2797 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69 2798 else
2799#endif
38ab35f8 2800 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW		 2801 break;
2802 case '!':
93189314
JH		 2803 {
2804#ifdef VMS
2805# define PERL_VMS_BANG vaxc$errno
2806#else
2807# define PERL_VMS_BANG 0
2808#endif
91487cfc 2809 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH		 2810 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2811 }
79072805
LW		 2812 break;
2813 case '<':
985213f2
AB		 2814 {
2815 const IV new_uid = SvIV(sv);
2816 PL_delaymagic_uid = new_uid;
3280af22
NIS		 2817 if (PL_delaymagic) {
2818 PL_delaymagic |= DM_RUID;
79072805
LW		 2819 break; /* don't do magic till later */
2820 }
2821#ifdef HAS_SETRUID
985213f2 2822 (void)setruid((Uid_t)new_uid);
79072805
LW		 2823#else
2824#ifdef HAS_SETREUID
985213f2 2825 (void)setreuid((Uid_t)new_uid, (Uid_t)-1);
748a9306 2826#else
85e6fe83 2827#ifdef HAS_SETRESUID
985213f2 2828 (void)setresuid((Uid_t)new_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2829#else
985213f2 2830 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
75870ed3 2831#ifdef PERL_DARWIN
2832 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
985213f2 2833 if (new_uid != 0 && PerlProc_getuid() == 0)
75870ed3 2834 (void)PerlProc_setuid(0);
2835#endif
985213f2 2836 (void)PerlProc_setuid(new_uid);
75870ed3 2837 } else {
cea2e8a9 2838 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2839 }
79072805
LW		 2840#endif
2841#endif
85e6fe83 2842#endif
79072805 2843 break;
985213f2 2844 }
79072805 2845 case '>':
985213f2
AB		 2846 {
2847 const UV new_euid = SvIV(sv);
2848 PL_delaymagic_euid = new_euid;
3280af22
NIS		 2849 if (PL_delaymagic) {
2850 PL_delaymagic |= DM_EUID;
79072805
LW		 2851 break; /* don't do magic till later */
2852 }
2853#ifdef HAS_SETEUID
985213f2 2854 (void)seteuid((Uid_t)new_euid);
79072805
LW		 2855#else
2856#ifdef HAS_SETREUID
985213f2 2857 (void)setreuid((Uid_t)-1, (Uid_t)new_euid);
85e6fe83
LW		 2858#else
2859#ifdef HAS_SETRESUID
985213f2 2860 (void)setresuid((Uid_t)-1, (Uid_t)new_euid, (Uid_t)-1);
79072805 2861#else
985213f2 2862 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
382669a9 2863 PerlProc_setuid(new_euid);
a0d0e21e 2864 else {
cea2e8a9 2865 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2866 }
79072805
LW		 2867#endif
2868#endif
85e6fe83 2869#endif
79072805 2870 break;
985213f2 2871 }
79072805 2872 case '(':
985213f2
AB		 2873 {
2874 const UV new_gid = SvIV(sv);
2875 PL_delaymagic_gid = new_gid;
3280af22
NIS		 2876 if (PL_delaymagic) {
2877 PL_delaymagic |= DM_RGID;
79072805
LW		 2878 break; /* don't do magic till later */
2879 }
2880#ifdef HAS_SETRGID
985213f2 2881 (void)setrgid((Gid_t)new_gid);
79072805
LW		 2882#else
2883#ifdef HAS_SETREGID
985213f2 2884 (void)setregid((Gid_t)new_gid, (Gid_t)-1);
85e6fe83
LW		 2885#else
2886#ifdef HAS_SETRESGID
985213f2 2887 (void)setresgid((Gid_t)new_gid, (Gid_t)-1, (Gid_t) -1);
79072805 2888#else
985213f2
AB		 2889 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2890 (void)PerlProc_setgid(new_gid);
748a9306 2891 else {
cea2e8a9 2892 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2893 }
79072805
LW		 2894#endif
2895#endif
85e6fe83 2896#endif
79072805 2897 break;
985213f2 2898 }
79072805 2899 case ')':
985213f2
AB		 2900 {
2901 UV new_egid;
5cd24f17 2902#ifdef HAS_SETGROUPS
2903 {
b83604b4 2904 const char *p = SvPV_const(sv, len);
757f63d8 2905 Groups_t *gary = NULL;
fb4089e0 2906#ifdef _SC_NGROUPS_MAX
2907 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2908
2909 if (maxgrp < 0)
2910 maxgrp = NGROUPS;
2911#else
2912 int maxgrp = NGROUPS;
2913#endif
757f63d8
SP		 2914
2915 while (isSPACE(*p))
2916 ++p;
985213f2 2917 new_egid = Atol(p);
fb4089e0 2918 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP		 2919 while (*p && !isSPACE(*p))
2920 ++p;
2921 while (isSPACE(*p))
2922 ++p;
2923 if (!*p)
2924 break;
2925 if(!gary)
2926 Newx(gary, i + 1, Groups_t);
2927 else
2928 Renew(gary, i + 1, Groups_t);
2929 gary[i] = Atol(p);
2930 }
2931 if (i)
2932 (void)setgroups(i, gary);
f5a63d97 2933 Safefree(gary);
5cd24f17 2934 }
2935#else /* HAS_SETGROUPS */
985213f2 2936 new_egid = SvIV(sv);
5cd24f17 2937#endif /* HAS_SETGROUPS */
985213f2 2938 PL_delaymagic_egid = new_egid;
3280af22
NIS		 2939 if (PL_delaymagic) {
2940 PL_delaymagic |= DM_EGID;
79072805
LW		 2941 break; /* don't do magic till later */
2942 }
2943#ifdef HAS_SETEGID
985213f2 2944 (void)setegid((Gid_t)new_egid);
79072805
LW		 2945#else
2946#ifdef HAS_SETREGID
985213f2 2947 (void)setregid((Gid_t)-1, (Gid_t)new_egid);
85e6fe83
LW		 2948#else
2949#ifdef HAS_SETRESGID
985213f2 2950 (void)setresgid((Gid_t)-1, (Gid_t)new_egid, (Gid_t)-1);
79072805 2951#else
985213f2
AB		 2952 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2953 (void)PerlProc_setgid(new_egid);
748a9306 2954 else {
cea2e8a9 2955 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2956 }
79072805
LW		 2957#endif
2958#endif
85e6fe83 2959#endif
79072805 2960 break;
985213f2 2961 }
79072805 2962 case ':':
2d8e6c8d 2963 PL_chopset = SvPV_force(sv,len);
79072805 2964 break;
9cdac2a2
FC		 2965 case '$': /* $$ */
2966 /* Store the pid in mg->mg_obj so we can tell when a fork has
2967 occurred. mg->mg_obj points to *$ by default, so clear it. */
2968 if (isGV(mg->mg_obj)) {
2969 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2970 SvREFCNT_dec(mg->mg_obj);
2971 mg->mg_flags |= MGf_REFCOUNTED;
2972 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2973 }
2974 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2975 break;
79072805 2976 case '0':
e2975953 2977 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS		 2978#ifdef HAS_SETPROCTITLE
2979 /* The BSDs don't show the argv[] in ps(1) output, they
2980 * show a string from the process struct and provide
2981 * the setproctitle() routine to manipulate that. */
a2722ac9 2982 if (PL_origalen != 1) {
b83604b4 2983 s = SvPV_const(sv, len);
98b76f99 2984# if __FreeBSD_version > 410001
9aad2c0e 2985 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS		 2986 * but not the "(perl) suffix from the ps(1)
2987 * output, because that's what ps(1) shows if the
2988 * argv[] is modified. */
6f2ad931 2989 setproctitle("-%s", s);
9aad2c0e 2990# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS		 2991 /* This doesn't really work if you assume that
2992 * $0 = 'foobar'; will wipe out 'perl' from the $0
2993 * because in ps(1) output the result will be like
2994 * sprintf("perl: %s (perl)", s)
2995 * I guess this is a security feature:
2996 * one (a user process) cannot get rid of the original name.
2997 * --jhi */
2998 setproctitle("%s", s);
2999# endif
3000 }
9d3968b2 3001#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 3002 if (PL_origalen != 1) {
17aa7f3d 3003 union pstun un;
b83604b4 3004 s = SvPV_const(sv, len);
6867be6d 3005 un.pst_command = (char *)s;
17aa7f3d
JH		 3006 pstat(PSTAT_SETCMD, un, len, 0, 0);
3007 }
9d3968b2 3008#else
2d2af554
GA		 3009 if (PL_origalen > 1) {
3010 /* PL_origalen is set in perl_parse(). */
3011 s = SvPV_force(sv,len);
3012 if (len >= (STRLEN)PL_origalen-1) {
3013 /* Longer than original, will be truncated. We assume that
3014 * PL_origalen bytes are available. */
3015 Copy(s, PL_origargv[0], PL_origalen-1, char);
3016 }
3017 else {
3018 /* Shorter than original, will be padded. */
235ac35d 3019#ifdef PERL_DARWIN
60777a0d
JH		 3020 /* Special case for Mac OS X: see [perl #38868] */
3021 const int pad = 0;
235ac35d 3022#else
8a89a4f1
MB		 3023 /* Is the space counterintuitive? Yes.
3024 * (You were expecting \0?)
3025 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3026 * --jhi */
60777a0d 3027 const int pad = ' ';
235ac35d 3028#endif
60777a0d
JH		 3029 Copy(s, PL_origargv[0], len, char);
3030 PL_origargv[0][len] = 0;
3031 memset(PL_origargv[0] + len + 1,
3032 pad, PL_origalen - len - 1);
2d2af554
GA		 3033 }
3034 PL_origargv[0][PL_origalen-1] = 0;
3035 for (i = 1; i < PL_origargc; i++)
3036 PL_origargv[i] = 0;
7636ea95
AB		 3037#ifdef HAS_PRCTL_SET_NAME
3038 /* Set the legacy process name in addition to the POSIX name on Linux */
3039 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3040 /* diag_listed_as: SKIPME */
3041 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3042 }
3043#endif
79072805 3044 }
9d3968b2 3045#endif
e2975953 3046 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW		 3047 break;
3048 }
3049 return 0;
3050}
3051
3052I32
84c7b88c
BF		 3053Perl_whichsig_sv(pTHX_ SV *sigsv)
3054{
3055 const char *sigpv;
3056 STRLEN siglen;
3057 PERL_ARGS_ASSERT_WHICHSIG_SV;
3058 PERL_UNUSED_CONTEXT;
3059 sigpv = SvPV_const(sigsv, siglen);
3060 return whichsig_pvn(sigpv, siglen);
3061}
3062
3063I32
3064Perl_whichsig_pv(pTHX_ const char *sig)
3065{
3066 PERL_ARGS_ASSERT_WHICHSIG_PV;
3067 PERL_UNUSED_CONTEXT;
3068 return whichsig_pvn(sig, strlen(sig));
3069}
3070
3071I32
3072Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
79072805 3073{
aadb217d 3074 register char* const* sigv;
7918f24d 3075
84c7b88c 3076 PERL_ARGS_ASSERT_WHICHSIG_PVN;
96a5add6 3077 PERL_UNUSED_CONTEXT;
79072805 3078
aadb217d 3079 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
84c7b88c 3080 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
aadb217d 3081 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805 3082#ifdef SIGCLD
84c7b88c 3083 if (memEQs(sig, len, "CHLD"))
79072805
LW		 3084 return SIGCLD;
3085#endif
3086#ifdef SIGCHLD
84c7b88c 3087 if (memEQs(sig, len, "CLD"))
79072805
LW		 3088 return SIGCHLD;
3089#endif
7f1236c0 3090 return -1;
79072805
LW		 3091}
3092
ecfc5424 3093Signal_t
1e82f5a6 3094#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3095Perl_sighandler(int sig, siginfo_t *sip, void *uap)
1e82f5a6
SH		 3096#else
3097Perl_sighandler(int sig)
3098#endif
79072805 3099{
1018e26f
NIS		 3100#ifdef PERL_GET_SIG_CONTEXT
3101 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 3102#else
cea2e8a9 3103 dTHX;
71d280e3 3104#endif
79072805 3105 dSP;
a0714e2c
SS		 3106 GV *gv = NULL;
3107 SV *sv = NULL;
8772537c 3108 SV * const tSv = PL_Sv;
601f1833 3109 CV *cv = NULL;
533c011a 3110 OP *myop = PL_op;
84902520 3111 U32 flags = 0;
8772537c 3112 XPV * const tXpv = PL_Xpv;
0c4d3b5e 3113 I32 old_ss_ix = PL_savestack_ix;
100c03aa 3114 SV *errsv_save = NULL;
71d280e3 3115
84902520 3116
727405f8 3117 if (!PL_psig_ptr[sig]) {
99ef548b 3118 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS		 3119 PL_sig_name[sig]);
3120 exit(sig);
3121 }
ff0cee69 3122
a0d63a7b
DM		 3123 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3124 /* Max number of items pushed there is 3*n or 4. We cannot fix
3125 infinity, so we fix 4 (in fact 5): */
3126 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3127 flags |= 1;
3128 PL_savestack_ix += 5; /* Protect save in progress. */
3129 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3130 }
84902520 3131 }
84902520 3132 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 3133 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL		 3134 || SvTYPE(cv) != SVt_PVCV) {
3135 HV *st;
f2c0649b 3136 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 3137 }
84902520 3138
a0d0e21e 3139 if (!cv || !CvROOT(cv)) {
a2a5de95
NC		 3140 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3141 PL_sig_name[sig], (gv ? GvENAME(gv)
3142 : ((cv && CvGV(cv))
3143 ? GvENAME(CvGV(cv))
3144 : "__ANON__")));
00d579c5 3145 goto cleanup;
79072805
LW		 3146 }
3147
0c4d3b5e
DM		 3148 sv = PL_psig_name[sig]
3149 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3150 : newSVpv(PL_sig_name[sig],0);
72048cfe 3151 flags |= 8;
0c4d3b5e
DM		 3152 SAVEFREESV(sv);
3153
a0d63a7b
DM		 3154 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3155 /* make sure our assumption about the size of the SAVEs are correct:
3156 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3157 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3158 }
e336de0d 3159
e788e7d3 3160 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 3161 PUSHMARK(SP);
79072805 3162 PUSHs(sv);
8aad04aa
JH		 3163#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3164 {
3165 struct sigaction oact;
3166
3167 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH		 3168 if (sip) {
3169 HV *sih = newHV();
ad64d0ec 3170 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH		 3171 /* The siginfo fields signo, code, errno, pid, uid,
3172 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC		 3173 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3174 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 3175#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		 3176 hv_stores(sih, "errno", newSViv(sip->si_errno));
3177 hv_stores(sih, "status", newSViv(sip->si_status));
3178 hv_stores(sih, "uid", newSViv(sip->si_uid));
3179 hv_stores(sih, "pid", newSViv(sip->si_pid));
3180 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3181 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 3182#endif
8aad04aa 3183 EXTEND(SP, 2);
ad64d0ec 3184 PUSHs(rv);
22f1178f 3185 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 3186 }
b4552a27 3187
8aad04aa
JH		 3188 }
3189 }
3190#endif
79072805 3191 PUTBACK;
a0d0e21e 3192
100c03aa
JL		 3193 errsv_save = newSVsv(ERRSV);
3194
ad64d0ec 3195 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 3196
d3acc0f7 3197 POPSTACK;
1b266415 3198 if (SvTRUE(ERRSV)) {
100c03aa 3199 SvREFCNT_dec(errsv_save);
c22d665b 3200#ifndef PERL_MICRO
1b266415
NIS		 3201 /* Handler "died", for example to get out of a restart-able read().
3202 * Before we re-do that on its behalf re-enable the signal which was
3203 * blocked by the system when we entered.
3204 */
c22d665b 3205#ifdef HAS_SIGPROCMASK
d488af49 3206#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3207 if (sip || uap)
c22d665b
LT		 3208#endif
3209 {
3210 sigset_t set;
3211 sigemptyset(&set);
3212 sigaddset(&set,sig);
3213 sigprocmask(SIG_UNBLOCK, &set, NULL);
3214 }
3215#else
1b266415
NIS		 3216 /* Not clear if this will work */
3217 (void)rsignal(sig, SIG_IGN);
5c1546dc 3218 (void)rsignal(sig, PL_csighandlerp);
c22d665b
LT		 3219#endif
3220#endif /* !PERL_MICRO */
c5df3096 3221 die_sv(ERRSV);
1b266415 3222 }
100c03aa
JL		 3223 else {
3224 sv_setsv(ERRSV, errsv_save);
3225 SvREFCNT_dec(errsv_save);
3226 }
3227
00d579c5 3228cleanup:
0c4d3b5e
DM		 3229 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3230 PL_savestack_ix = old_ss_ix;
72048cfe 3231 if (flags & 8)
84902520 3232 SvREFCNT_dec(sv);
533c011a 3233 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3234
3280af22
NIS		 3235 PL_Sv = tSv; /* Restore global temporaries. */
3236 PL_Xpv = tXpv;
53bb94e2 3237 return;
79072805 3238}
4e35701f
NIS		 3239
3240
51371543 3241static void
8772537c 3242S_restore_magic(pTHX_ const void *p)
51371543 3243{
97aff369 3244 dVAR;
8772537c
AL		 3245 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3246 SV* const sv = mgs->mgs_sv;
150b625d 3247 bool bumped;
51371543
GS		 3248
3249 if (!sv)
3250 return;
3251
3252 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
3253 {
f8c7b90f 3254#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC		 3255 /* While magic was saved (and off) sv_setsv may well have seen
3256 this SV as a prime candidate for COW. */
3257 if (SvIsCOW(sv))
e424a81e 3258 sv_force_normal_flags(sv, 0);
f9701176
NC		 3259#endif
3260
f9c6fee5
CS		 3261 if (mgs->mgs_readonly)
3262 SvREADONLY_on(sv);
3263 if (mgs->mgs_magical)
3264 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS		 3265 else
3266 mg_magical(sv);
2b77b520
YST		 3267 if (SvGMAGICAL(sv)) {
3268 /* downgrade public flags to private,
3269 and discard any other private flags */
3270
10edeb5d
JH		 3271 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
3272 if (pubflags) {
3273 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
3274 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST		 3275 }
3276 }
51371543
GS		 3277 }
3278
150b625d 3279 bumped = mgs->mgs_bumped;
51371543
GS		 3280 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3281
3282 /* If we're still on top of the stack, pop us off. (That condition
3283 * will be satisfied if restore_magic was called explicitly, but *not*
3284 * if it's being called via leave_scope.)
3285 * The reason for doing this is that otherwise, things like sv_2cv()
3286 * may leave alloc gunk on the savestack, and some code
3287 * (e.g. sighandler) doesn't expect that...
3288 */
3289 if (PL_savestack_ix == mgs->mgs_ss_ix)
3290 {
1be36ce0
NC		 3291 UV popval = SSPOPUV;
3292 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3293 PL_savestack_ix -= 2;
1be36ce0
NC		 3294 popval = SSPOPUV;
3295 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3296 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543 3297 }
150b625d
DM		 3298 if (bumped) {
3299 if (SvREFCNT(sv) == 1) {
3300 /* We hold the last reference to this SV, which implies that the
3301 SV was deleted as a side effect of the routines we called.
3302 So artificially keep it alive a bit longer.
3303 We avoid turning on the TEMP flag, which can cause the SV's
3304 buffer to get stolen (and maybe other stuff). */
3305 int was_temp = SvTEMP(sv);
3306 sv_2mortal(sv);
3307 if (!was_temp) {
3308 SvTEMP_off(sv);
3309 }
3310 SvOK_off(sv);
8985fe98 3311 }
150b625d
DM		 3312 else
3313 SvREFCNT_dec(sv); /* undo the inc in S_save_magic() */
8985fe98 3314 }
51371543
GS		 3315}
3316
0c4d3b5e
DM		 3317/* clean up the mess created by Perl_sighandler().
3318 * Note that this is only called during an exit in a signal handler;
3319 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
9a7f166c 3320 * skipped over. */
0c4d3b5e 3321
51371543 3322static void
8772537c 3323S_unwind_handler_stack(pTHX_ const void *p)
51371543 3324{
27da23d5 3325 dVAR;
0c4d3b5e 3326 PERL_UNUSED_ARG(p);
7918f24d 3327
0c4d3b5e 3328 PL_savestack_ix -= 5; /* Unprotect save in progress. */
51371543 3329}
1018e26f 3330
66610fdd 3331/*
b3ca2e83
NC		 3332=for apidoc magic_sethint
3333
3334Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC		 3335C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3336anything that would need a deep copy. Maybe we should warn if we find a
3337reference.
b3ca2e83
NC		 3338
3339=cut
3340*/
3341int
3342Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3343{
3344 dVAR;
ad64d0ec 3345 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
59cd0e26 3346 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
b3ca2e83 3347
7918f24d
NC		 3348 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3349
e6e3e454
NC		 3350 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3351 an alternative leaf in there, with PL_compiling.cop_hints being used if
3352 it's NULL. If needed for threads, the alternative could lock a mutex,
3353 or take other more complex action. */
3354
5b9c0671
NC		 3355 /* Something changed in %^H, so it will need to be restored on scope exit.
3356 Doing this here saves a lot of doing it manually in perl code (and
3357 forgetting to do it, and consequent subtle errors. */
3358 PL_hints |= HINT_LOCALIZE_HH;
20439bc7
Z		 3359 CopHINTHASH_set(&PL_compiling,
3360 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
b3ca2e83
NC		 3361 return 0;
3362}
3363
3364/*
f175cff5 3365=for apidoc magic_clearhint
b3ca2e83 3366
c28fe1ec
NC		 3367Triggered by a delete from %^H, records the key to
3368C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC		 3369
3370=cut
3371*/
3372int
3373Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3374{
3375 dVAR;
7918f24d
NC		 3376
3377 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
f5a63d97
AL		 3378 PERL_UNUSED_ARG(sv);
3379
5b9c0671 3380 PL_hints |= HINT_LOCALIZE_HH;
20439bc7 3381 CopHINTHASH_set(&PL_compiling,
e3352591
FC		 3382 mg->mg_len == HEf_SVKEY
3383 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3384 MUTABLE_SV(mg->mg_ptr), 0, 0)
3385 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3386 mg->mg_ptr, mg->mg_len, 0, 0));
b3ca2e83
NC		 3387 return 0;
3388}
3389
3390/*
f747ebd6
Z		 3391=for apidoc magic_clearhints
3392
3393Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3394
3395=cut
3396*/
3397int
3398Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3399{
3400 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3401 PERL_UNUSED_ARG(sv);
3402 PERL_UNUSED_ARG(mg);
20439bc7
Z		 3403 cophh_free(CopHINTHASH_get(&PL_compiling));
3404 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
f747ebd6
Z		 3405 return 0;
3406}
3407
09fb282d
FC		 3408int
3409Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3410 const char *name, I32 namlen)
3411{
3412 MAGIC *nmg;
3413
3414 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
3415 PERL_UNUSED_ARG(name);
3416 PERL_UNUSED_ARG(namlen);
3417
3418 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3419 nmg = mg_find(nsv, mg->mg_type);
3420 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3421 nmg->mg_ptr = mg->mg_ptr;
3422 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3423 nmg->mg_flags |= MGf_REFCOUNTED;
3424 return 1;
3425}
3426
f747ebd6 3427/*
66610fdd
RGS		 3428 * Local variables:
3429 * c-indentation-style: bsd
3430 * c-basic-offset: 4
14d04a33 3431 * indent-tabs-mode: nil
66610fdd
RGS		 3432 * End:
3433 *
14d04a33 3434 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3435 */
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