This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
[perl #112826] Make Tie::StdHandle::READ respect offset
[perl5.git] / mg.c
CommitLineData
a0d0e21e 1/* mg.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent.
14 *
15 * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"]
79072805
LW
16 */
17
ccfc67b7
JH
18/*
19=head1 Magical Functions
166f8a29
DM
20
21"Magic" is special data attached to SV structures in order to give them
22"magical" properties. When any Perl code tries to read from, or assign to,
23an SV marked as magical, it calls the 'get' or 'set' function associated
24with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 25give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
26number of the last read filehandle into to the SV's IV slot), while
27set is called after an SV has been written to, in order to allow it to make
ddfa107c 28use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
29PL_rs global variable).
30
31Magic is implemented as a linked list of MAGIC structures attached to the
32SV. Each MAGIC struct holds the type of the magic, a pointer to an array
33of functions that implement the get(), set(), length() etc functions,
34plus space for some flags and pointers. For example, a tied variable has
35a MAGIC structure that contains a pointer to the object associated with the
36tie.
37
ccfc67b7
JH
38*/
39
79072805 40#include "EXTERN.h"
864dbfa3 41#define PERL_IN_MG_C
79072805
LW
42#include "perl.h"
43
5cd24f17 44#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
45# ifdef I_GRP
46# include <grp.h>
47# endif
188ea221
CS
48#endif
49
757f63d8
SP
50#if defined(HAS_SETGROUPS)
51# ifndef NGROUPS
52# define NGROUPS 32
53# endif
54#endif
55
17aa7f3d
JH
56#ifdef __hpux
57# include <sys/pstat.h>
58#endif
59
7636ea95
AB
60#ifdef HAS_PRCTL_SET_NAME
61# include <sys/prctl.h>
62#endif
63
8aad04aa 64#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 65Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 66#else
e69880a5 67Signal_t Perl_csighandler(int sig);
8aad04aa 68#endif
e69880a5 69
9cffb111
OS
70#ifdef __Lynx__
71/* Missing protos on LynxOS */
72void setruid(uid_t id);
73void seteuid(uid_t id);
74void setrgid(uid_t id);
75void setegid(uid_t id);
76#endif
77
c07a80fd
PP
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
PP
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
PP
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
PP
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
PP
1189 int i = 0, j = 0;
1190
6fca0082 1191 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1192 elt = eltbuf;
1e422769
PP
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
PP
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
PP
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
PP
1269 I32 keylen;
1270 my_setenv(hv_iterkey(entry, &keylen),
85fbaab2 1271 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
fb73857a
PP
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
PP
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
PP
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
PP
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
2046Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2047{
97aff369 2048 dVAR;
7918f24d
NC
2049
2050 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 2051 PERL_UNUSED_ARG(sv);
7918f24d 2052
94f3782b
DM
2053 /* during global destruction, mg_obj may already have been freed */
2054 if (PL_in_clean_all)
1ea47f64 2055 return 0;
94f3782b 2056
83bf042f
NC
2057 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2058
2059 if (mg) {
2060 /* arylen scalar holds a pointer back to the array, but doesn't own a
2061 reference. Hence the we (the array) are about to go away with it
2062 still pointing at us. Clear its pointer, else it would be pointing
2063 at free memory. See the comment in sv_magic about reference loops,
2064 and why it can't own a reference to us. */
2065 mg->mg_obj = 0;
2066 }
a0d0e21e
LW
2067 return 0;
2068}
2069
2070int
864dbfa3 2071Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2072{
97aff369 2073 dVAR;
16eb5365 2074 SV* const lsv = LvTARG(sv);
7918f24d
NC
2075
2076 PERL_ARGS_ASSERT_MAGIC_GETPOS;
16eb5365 2077 PERL_UNUSED_ARG(mg);
ac27b0f5 2078
a0d0e21e 2079 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
2080 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
2081 if (found && found->mg_len >= 0) {
2082 I32 i = found->mg_len;
7e2040f0 2083 if (DO_UTF8(lsv))
a0ed51b3 2084 sv_pos_b2u(lsv, &i);
e1dccc0d 2085 sv_setiv(sv, i);
a0d0e21e
LW
2086 return 0;
2087 }
2088 }
0c34ef67 2089 SvOK_off(sv);
a0d0e21e
LW
2090 return 0;
2091}
2092
2093int
864dbfa3 2094Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2095{
97aff369 2096 dVAR;
16eb5365 2097 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
2098 SSize_t pos;
2099 STRLEN len;
c00206c8 2100 STRLEN ulen = 0;
53d44271 2101 MAGIC* found;
a0d0e21e 2102
7918f24d 2103 PERL_ARGS_ASSERT_MAGIC_SETPOS;
16eb5365 2104 PERL_UNUSED_ARG(mg);
ac27b0f5 2105
a0d0e21e 2106 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
2107 found = mg_find(lsv, PERL_MAGIC_regex_global);
2108 else
2109 found = NULL;
2110 if (!found) {
a0d0e21e
LW
2111 if (!SvOK(sv))
2112 return 0;
d83f0a82
NC
2113#ifdef PERL_OLD_COPY_ON_WRITE
2114 if (SvIsCOW(lsv))
2115 sv_force_normal_flags(lsv, 0);
2116#endif
3881461a 2117 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 2118 NULL, 0);
a0d0e21e
LW
2119 }
2120 else if (!SvOK(sv)) {
3881461a 2121 found->mg_len = -1;
a0d0e21e
LW
2122 return 0;
2123 }
2124 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
2125
e1dccc0d 2126 pos = SvIV(sv);
a0ed51b3 2127
7e2040f0 2128 if (DO_UTF8(lsv)) {
a0ed51b3
LW
2129 ulen = sv_len_utf8(lsv);
2130 if (ulen)
2131 len = ulen;
a0ed51b3
LW
2132 }
2133
a0d0e21e
LW
2134 if (pos < 0) {
2135 pos += len;
2136 if (pos < 0)
2137 pos = 0;
2138 }
eb160463 2139 else if (pos > (SSize_t)len)
a0d0e21e 2140 pos = len;
a0ed51b3
LW
2141
2142 if (ulen) {
2143 I32 p = pos;
2144 sv_pos_u2b(lsv, &p, 0);
2145 pos = p;
2146 }
727405f8 2147
3881461a
AL
2148 found->mg_len = pos;
2149 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 2150
79072805
LW
2151 return 0;
2152}
2153
2154int
864dbfa3 2155Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
2156{
2157 STRLEN len;
35a4481c 2158 SV * const lsv = LvTARG(sv);
b83604b4 2159 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB
2160 STRLEN offs = LvTARGOFF(sv);
2161 STRLEN rem = LvTARGLEN(sv);
83f78d1a
FC
2162 const bool negoff = LvFLAGS(sv) & 1;
2163 const bool negrem = LvFLAGS(sv) & 2;
7918f24d
NC
2164
2165 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2166 PERL_UNUSED_ARG(mg);
6ff81951 2167
83f78d1a
FC
2168 if (!translate_substr_offsets(
2169 SvUTF8(lsv) ? sv_len_utf8(lsv) : len,
2170 negoff ? -(IV)offs : (IV)offs, !negoff,
2171 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2172 )) {
2173 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2174 sv_setsv_nomg(sv, &PL_sv_undef);
2175 return 0;
2176 }
2177
9aa983d2 2178 if (SvUTF8(lsv))
d931b1be 2179 offs = sv_pos_u2b_flags(lsv, offs, &rem, SV_CONST_RETURN);
1c900557 2180 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2181 if (SvUTF8(lsv))
2ef4b674 2182 SvUTF8_on(sv);
6ff81951
GS
2183 return 0;
2184}
2185
2186int
864dbfa3 2187Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2188{
97aff369 2189 dVAR;
83f78d1a 2190 STRLEN len, lsv_len, oldtarglen, newtarglen;
5fcbf73d 2191 const char * const tmps = SvPV_const(sv, len);
dd374669 2192 SV * const lsv = LvTARG(sv);
777f7c56
EB
2193 STRLEN lvoff = LvTARGOFF(sv);
2194 STRLEN lvlen = LvTARGLEN(sv);
83f78d1a
FC
2195 const bool negoff = LvFLAGS(sv) & 1;
2196 const bool neglen = LvFLAGS(sv) & 2;
7918f24d
NC
2197
2198 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2199 PERL_UNUSED_ARG(mg);
075a4a2b 2200
a74fb2cd
FC
2201 SvGETMAGIC(lsv);
2202 if (SvROK(lsv))
2203 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2204 "Attempt to use reference as lvalue in substr"
2205 );
83f78d1a
FC
2206 if (SvUTF8(lsv)) lsv_len = sv_len_utf8(lsv);
2207 else (void)SvPV_nomg(lsv,lsv_len);
2208 if (!translate_substr_offsets(
2209 lsv_len,
2210 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2211 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2212 ))
2213 Perl_croak(aTHX_ "substr outside of string");
2214 oldtarglen = lvlen;
1aa99e6b 2215 if (DO_UTF8(sv)) {
9aa983d2 2216 sv_utf8_upgrade(lsv);
d931b1be 2217 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
a74fb2cd 2218 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2219 newtarglen = sv_len_utf8(sv);
9aa983d2
JH
2220 SvUTF8_on(lsv);
2221 }
9bf12eaf 2222 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2223 const char *utf8;
d931b1be 2224 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
83f78d1a 2225 newtarglen = len;
5fcbf73d 2226 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
a74fb2cd 2227 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
5fcbf73d 2228 Safefree(utf8);
1aa99e6b 2229 }
b76f3ce2 2230 else {
a74fb2cd 2231 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2232 newtarglen = len;
b76f3ce2 2233 }
83f78d1a
FC
2234 if (!neglen) LvTARGLEN(sv) = newtarglen;
2235 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
b76f3ce2 2236
79072805
LW
2237 return 0;
2238}
2239
2240int
864dbfa3 2241Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2242{
97aff369 2243 dVAR;
7918f24d
NC
2244
2245 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2246 PERL_UNUSED_ARG(sv);
7918f24d 2247
27cc343c 2248 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2249 return 0;
2250}
2251
2252int
864dbfa3 2253Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2254{
97aff369 2255 dVAR;
7918f24d
NC
2256
2257 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2258 PERL_UNUSED_ARG(sv);
7918f24d 2259
b01e650a
DM
2260 /* update taint status */
2261 if (PL_tainted)
2262 mg->mg_len |= 1;
2263 else
2264 mg->mg_len &= ~1;
463ee0b2
LW
2265 return 0;
2266}
2267
2268int
864dbfa3 2269Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2270{
35a4481c 2271 SV * const lsv = LvTARG(sv);
7918f24d
NC
2272
2273 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2274 PERL_UNUSED_ARG(mg);
6ff81951 2275
6136c704
AL
2276 if (lsv)
2277 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2278 else
0c34ef67 2279 SvOK_off(sv);
6ff81951 2280
6ff81951
GS
2281 return 0;
2282}
2283
2284int
864dbfa3 2285Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2286{
7918f24d 2287 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2288 PERL_UNUSED_ARG(mg);
79072805
LW
2289 do_vecset(sv); /* XXX slurp this routine */
2290 return 0;
2291}
2292
2293int
1e6bda93
FC
2294Perl_magic_setvstring(pTHX_ SV *sv, MAGIC *mg)
2295{
2296 PERL_ARGS_ASSERT_MAGIC_SETVSTRING;
2297
2298 if (SvPOKp(sv)) {
2299 SV * const vecsv = sv_newmortal();
2300 scan_vstring(mg->mg_ptr, mg->mg_ptr + mg->mg_len, vecsv);
2301 if (sv_eq_flags(vecsv, sv, 0 /*nomg*/)) return 0;
2302 }
2303 return sv_unmagic(sv, mg->mg_type);
2304}
2305
2306int
864dbfa3 2307Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2308{
97aff369 2309 dVAR;
a0714e2c 2310 SV *targ = NULL;
7918f24d
NC
2311
2312 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2313
5f05dabc 2314 if (LvTARGLEN(sv)) {
68dc0745 2315 if (mg->mg_obj) {
8772537c 2316 SV * const ahv = LvTARG(sv);
85fbaab2 2317 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
6d822dc4
MS
2318 if (he)
2319 targ = HeVAL(he);
68dc0745
PP
2320 }
2321 else {
502c6561 2322 AV *const av = MUTABLE_AV(LvTARG(sv));
68dc0745
PP
2323 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2324 targ = AvARRAY(av)[LvTARGOFF(sv)];
2325 }
46da273f 2326 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2327 /* somebody else defined it for us */
2328 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2329 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2330 LvTARGLEN(sv) = 0;
2331 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2332 mg->mg_obj = NULL;
68dc0745
PP
2333 mg->mg_flags &= ~MGf_REFCOUNTED;
2334 }
5f05dabc 2335 }
71be2cbc
PP
2336 else
2337 targ = LvTARG(sv);
3280af22 2338 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2339 return 0;
2340}
2341
2342int
864dbfa3 2343Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2344{
7918f24d 2345 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2346 PERL_UNUSED_ARG(mg);
71be2cbc 2347 if (LvTARGLEN(sv))
68dc0745
PP
2348 vivify_defelem(sv);
2349 if (LvTARG(sv)) {
5f05dabc 2350 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2351 SvSETMAGIC(LvTARG(sv));
2352 }
5f05dabc
PP
2353 return 0;
2354}
2355
71be2cbc 2356void
864dbfa3 2357Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2358{
97aff369 2359 dVAR;
74e13ce4 2360 MAGIC *mg;
a0714e2c 2361 SV *value = NULL;
71be2cbc 2362
7918f24d
NC
2363 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2364
14befaf4 2365 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2366 return;
68dc0745 2367 if (mg->mg_obj) {
8772537c 2368 SV * const ahv = LvTARG(sv);
85fbaab2 2369 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS
2370 if (he)
2371 value = HeVAL(he);
3280af22 2372 if (!value || value == &PL_sv_undef)
be2597df 2373 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2374 }
68dc0745 2375 else {
502c6561 2376 AV *const av = MUTABLE_AV(LvTARG(sv));
5aabfad6 2377 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2378 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2379 else {
d4c19fe8 2380 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2381 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2382 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2383 }
2384 }
b37c2d43 2385 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2386 SvREFCNT_dec(LvTARG(sv));
2387 LvTARG(sv) = value;
71be2cbc 2388 LvTARGLEN(sv) = 0;
68dc0745 2389 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2390 mg->mg_obj = NULL;
68dc0745 2391 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2392}
2393
2394int
864dbfa3 2395Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2396{
7918f24d 2397 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
5648c0ae
DM
2398 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2399 return 0;
810b8aa5
GS
2400}
2401
2402int
864dbfa3 2403Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2404{
7918f24d 2405 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2406 PERL_UNUSED_CONTEXT;
0177730e 2407 PERL_UNUSED_ARG(sv);
565764a8 2408 mg->mg_len = -1;
93a17b20
LW
2409 return 0;
2410}
2411
2412int
864dbfa3 2413Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2414{
35a4481c 2415 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2416
7918f24d
NC
2417 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2418
79072805 2419 if (uf && uf->uf_set)
24f81a43 2420 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2421 return 0;
2422}
2423
c277df42 2424int
faf82a0b
AE
2425Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2426{
488344d2 2427 const char type = mg->mg_type;
7918f24d
NC
2428
2429 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2430
488344d2
NC
2431 if (type == PERL_MAGIC_qr) {
2432 } else if (type == PERL_MAGIC_bm) {
2433 SvTAIL_off(sv);
2434 SvVALID_off(sv);
2435 } else {
2436 assert(type == PERL_MAGIC_fm);
488344d2
NC
2437 }
2438 return sv_unmagic(sv, type);
faf82a0b
AE
2439}
2440
7a4c00b4 2441#ifdef USE_LOCALE_COLLATE
79072805 2442int
864dbfa3 2443Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2444{
7918f24d
NC
2445 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2446
bbce6d69 2447 /*
838b5b74 2448 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2449 * and vanished with a faint plop.
2450 */
96a5add6 2451 PERL_UNUSED_CONTEXT;
8772537c 2452 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2453 if (mg->mg_ptr) {
2454 Safefree(mg->mg_ptr);
2455 mg->mg_ptr = NULL;
565764a8 2456 mg->mg_len = -1;
7a4c00b4 2457 }
bbce6d69
PP
2458 return 0;
2459}
7a4c00b4 2460#endif /* USE_LOCALE_COLLATE */
bbce6d69 2461
7e8c5dac
HS
2462/* Just clear the UTF-8 cache data. */
2463int
2464Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2465{
7918f24d 2466 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2467 PERL_UNUSED_CONTEXT;
8772537c 2468 PERL_UNUSED_ARG(sv);
7e8c5dac 2469 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2470 mg->mg_ptr = NULL;
7e8c5dac
HS
2471 mg->mg_len = -1; /* The mg_len holds the len cache. */
2472 return 0;
2473}
2474
bbce6d69 2475int
864dbfa3 2476Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2477{
97aff369 2478 dVAR;
e1ec3a88 2479 register const char *s;
2fdbfb4d
AB
2480 register I32 paren;
2481 register const REGEXP * rx;
2482 const char * const remaining = mg->mg_ptr + 1;
79072805 2483 I32 i;
8990e307 2484 STRLEN len;
125b9982 2485 MAGIC *tmg;
2fdbfb4d 2486
7918f24d
NC
2487 PERL_ARGS_ASSERT_MAGIC_SET;
2488
79072805 2489 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2490 case '\015': /* $^MATCH */
2491 if (strEQ(remaining, "ATCH"))
2492 goto do_match;
2493 case '`': /* ${^PREMATCH} caught below */
2494 do_prematch:
f1b875a0 2495 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2496 goto setparen;
2497 case '\'': /* ${^POSTMATCH} caught below */
2498 do_postmatch:
f1b875a0 2499 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2500 goto setparen;
2501 case '&':
2502 do_match:
f1b875a0 2503 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2504 goto setparen;
2505 case '1': case '2': case '3': case '4':
2506 case '5': case '6': case '7': case '8': case '9':
104a8018 2507 paren = atoi(mg->mg_ptr);
2fdbfb4d 2508 setparen:
1e05feb3 2509 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9bad346 2510 setparen_got_rx:
2fdbfb4d 2511 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
1e05feb3 2512 } else {
2fdbfb4d
AB
2513 /* Croak with a READONLY error when a numbered match var is
2514 * set without a previous pattern match. Unless it's C<local $1>
2515 */
d9bad346 2516 croakparen:
2fdbfb4d 2517 if (!PL_localizing) {
6ad8f254 2518 Perl_croak_no_modify(aTHX);
2fdbfb4d
AB
2519 }
2520 }
9b9e0be4 2521 break;
748a9306 2522 case '\001': /* ^A */
3280af22 2523 sv_setsv(PL_bodytarget, sv);
64eff8b7
DM
2524 FmLINES(PL_bodytarget) = 0;
2525 if (SvPOK(PL_bodytarget)) {
2526 char *s = SvPVX(PL_bodytarget);
2527 while ( ((s = strchr(s, '\n'))) ) {
2528 FmLINES(PL_bodytarget)++;
2529 s++;
2530 }
2531 }
125b9982
NT
2532 /* mg_set() has temporarily made sv non-magical */
2533 if (PL_tainting) {
2534 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2535 SvTAINTED_on(PL_bodytarget);
2536 else
2537 SvTAINTED_off(PL_bodytarget);
2538 }
748a9306 2539 break;
49460fe6 2540 case '\003': /* ^C */
f2338a2e 2541 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS
2542 break;
2543
79072805 2544 case '\004': /* ^D */
b4ab917c 2545#ifdef DEBUGGING
b83604b4 2546 s = SvPV_nolen_const(sv);
ddcf8bc1 2547 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS
2548 if (DEBUG_x_TEST || DEBUG_B_TEST)
2549 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2550#else
38ab35f8 2551 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2552#endif
79072805 2553 break;
28f23441 2554 case '\005': /* ^E */
d0063567 2555 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2556#ifdef VMS
38ab35f8 2557 set_vaxc_errno(SvIV(sv));
e37778c2
NC
2558#else
2559# ifdef WIN32
d0063567 2560 SetLastError( SvIV(sv) );
e37778c2
NC
2561# else
2562# ifdef OS2
38ab35f8 2563 os2_setsyserrno(SvIV(sv));
e37778c2 2564# else
d0063567 2565 /* will anyone ever use this? */
38ab35f8 2566 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ
2567# endif
2568# endif
22fae026 2569#endif
d0063567
DK
2570 }
2571 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2572 SvREFCNT_dec(PL_encoding);
d0063567
DK
2573 if (SvOK(sv) || SvGMAGICAL(sv)) {
2574 PL_encoding = newSVsv(sv);
2575 }
2576 else {
a0714e2c 2577 PL_encoding = NULL;
d0063567
DK
2578 }
2579 }
2580 break;
79072805 2581 case '\006': /* ^F */
38ab35f8 2582 PL_maxsysfd = SvIV(sv);
79072805 2583 break;
a0d0e21e 2584 case '\010': /* ^H */
38ab35f8 2585 PL_hints = SvIV(sv);
a0d0e21e 2586 break;
9d116dd7 2587 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2588 Safefree(PL_inplace);
bd61b366 2589 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2590 break;
d9bad346
FC
2591 case '\016': /* ^N */
2592 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2593 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2594 goto croakparen;
28f23441 2595 case '\017': /* ^O */
ac27b0f5 2596 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2597 Safefree(PL_osname);
bd61b366 2598 PL_osname = NULL;
3511154c
DM
2599 if (SvOK(sv)) {
2600 TAINT_PROPER("assigning to $^O");
2e0de35c 2601 PL_osname = savesvpv(sv);
3511154c 2602 }
ac27b0f5
NIS
2603 }
2604 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2605 STRLEN len;
2606 const char *const start = SvPV(sv, len);
b54fc2b6 2607 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2608 SV *tmp;
8b850bd5
NC
2609
2610
2611 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2612 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC
2613
2614 /* Opening for input is more common than opening for output, so
2615 ensure that hints for input are sooner on linked list. */
59cd0e26 2616 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z
2617 SvUTF8(sv))
2618 : newSVpvs_flags("", SvUTF8(sv));
2619 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2620 mg_set(tmp);
8b850bd5 2621
f747ebd6
Z
2622 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2623 SvUTF8(sv));
2624 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2625 mg_set(tmp);
ac27b0f5 2626 }
28f23441 2627 break;
79072805 2628 case '\020': /* ^P */
2fdbfb4d
AB
2629 if (*remaining == '\0') { /* ^P */
2630 PL_perldb = SvIV(sv);
2631 if (PL_perldb && !PL_DBsingle)
2632 init_debugger();
2633 break;
2634 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2635 goto do_prematch;
2636 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2637 goto do_postmatch;
2638 }
9b9e0be4 2639 break;
79072805 2640 case '\024': /* ^T */
88e89b8a 2641#ifdef BIG_TIME
6b88bc9c 2642 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2643#else
38ab35f8 2644 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2645#endif
79072805 2646 break;
e07ea26a
NC
2647 case '\025': /* ^UTF8CACHE */
2648 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2649 PL_utf8cache = (signed char) sv_2iv(sv);
2650 }
2651 break;
fde18df1 2652 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2653 if (*(mg->mg_ptr+1) == '\0') {
2654 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2655 i = SvIV(sv);
ac27b0f5 2656 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2657 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2658 }
599cee73 2659 }
0a378802 2660 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2661 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
7e4f0450
FC
2662 if (!SvPOK(sv)) {
2663 PL_compiling.cop_warnings = pWARN_STD;
d775746e
GS
2664 break;
2665 }
f4fc7782 2666 {
b5477537 2667 STRLEN len, i;
d3a7d8c7 2668 int accumulate = 0 ;
f4fc7782 2669 int any_fatals = 0 ;
b83604b4 2670 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2671 for (i = 0 ; i < len ; ++i) {
2672 accumulate |= ptr[i] ;
2673 any_fatals |= (ptr[i] & 0xAA) ;
2674 }
4243c432
NC
2675 if (!accumulate) {
2676 if (!specialWARN(PL_compiling.cop_warnings))
2677 PerlMemShared_free(PL_compiling.cop_warnings);
2678 PL_compiling.cop_warnings = pWARN_NONE;
2679 }
72dc9ed5
NC
2680 /* Yuck. I can't see how to abstract this: */
2681 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2682 WARN_ALL) && !any_fatals) {
4243c432
NC
2683 if (!specialWARN(PL_compiling.cop_warnings))
2684 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2685 PL_compiling.cop_warnings = pWARN_ALL;
2686 PL_dowarn |= G_WARN_ONCE ;
727405f8 2687 }
d3a7d8c7 2688 else {
72dc9ed5
NC
2689 STRLEN len;
2690 const char *const p = SvPV_const(sv, len);
2691
2692 PL_compiling.cop_warnings
8ee4cf24 2693 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2694 p, len);
2695
d3a7d8c7
GS
2696 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2697 PL_dowarn |= G_WARN_ONCE ;
2698 }
f4fc7782 2699
d3a7d8c7 2700 }
4438c4b7 2701 }
971a9dd3 2702 }
79072805
LW
2703 break;
2704 case '.':
3280af22
NIS
2705 if (PL_localizing) {
2706 if (PL_localizing == 1)
7766f137 2707 SAVESPTR(PL_last_in_gv);
748a9306 2708 }
3280af22 2709 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2710 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2711 break;
2712 case '^':
acbe1b9d
FC
2713 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2714 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2715 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2716 break;
2717 case '~':
acbe1b9d
FC
2718 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2719 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2720 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2721 break;
2722 case '=':
acbe1b9d 2723 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2724 break;
2725 case '-':
acbe1b9d
FC
2726 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2727 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
099be4f1 2728 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2729 break;
2730 case '%':
acbe1b9d 2731 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2732 break;
2733 case '|':
4b65379b 2734 {
099be4f1 2735 IO * const io = GvIO(PL_defoutgv);
720f287d
AB
2736 if(!io)
2737 break;
38ab35f8 2738 if ((SvIV(sv)) == 0)
4b65379b
CS
2739 IoFLAGS(io) &= ~IOf_FLUSH;
2740 else {
2741 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2742 PerlIO *ofp = IoOFP(io);
2743 if (ofp)
2744 (void)PerlIO_flush(ofp);
2745 IoFLAGS(io) |= IOf_FLUSH;
2746 }
2747 }
79072805
LW
2748 }
2749 break;
79072805 2750 case '/':
3280af22 2751 SvREFCNT_dec(PL_rs);
8bfdd7d9 2752 PL_rs = newSVsv(sv);
79072805
LW
2753 break;
2754 case '\\':
ef8d46e8 2755 SvREFCNT_dec(PL_ors_sv);
009c130f 2756 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2757 PL_ors_sv = newSVsv(sv);
009c130f 2758 }
e3c19b7b 2759 else {
a0714e2c 2760 PL_ors_sv = NULL;
e3c19b7b 2761 }
79072805 2762 break;
7d69d4a6
FC
2763 case '[':
2764 if (SvIV(sv) != 0)
2765 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2766 break;
79072805 2767 case '?':
ff0cee69 2768#ifdef COMPLEX_STATUS
6b88bc9c 2769 if (PL_localizing == 2) {
41cb7b2b 2770 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
2771 PL_statusvalue = LvTARGOFF(sv);
2772 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2773 }
2774 else
2775#endif
2776#ifdef VMSISH_STATUS
2777 if (VMSISH_STATUS)
fb38d079 2778 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2779 else
2780#endif
38ab35f8 2781 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2782 break;
2783 case '!':
93189314
JH
2784 {
2785#ifdef VMS
2786# define PERL_VMS_BANG vaxc$errno
2787#else
2788# define PERL_VMS_BANG 0
2789#endif
91487cfc 2790 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2791 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2792 }
79072805
LW
2793 break;
2794 case '<':
985213f2
AB
2795 {
2796 const IV new_uid = SvIV(sv);
2797 PL_delaymagic_uid = new_uid;
3280af22
NIS
2798 if (PL_delaymagic) {
2799 PL_delaymagic |= DM_RUID;
79072805
LW
2800 break; /* don't do magic till later */
2801 }
2802#ifdef HAS_SETRUID
985213f2 2803 (void)setruid((Uid_t)new_uid);
79072805
LW
2804#else
2805#ifdef HAS_SETREUID
985213f2 2806 (void)setreuid((Uid_t)new_uid, (Uid_t)-1);
748a9306 2807#else
85e6fe83 2808#ifdef HAS_SETRESUID
985213f2 2809 (void)setresuid((Uid_t)new_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2810#else
985213f2 2811 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
75870ed3 2812#ifdef PERL_DARWIN
2813 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
985213f2 2814 if (new_uid != 0 && PerlProc_getuid() == 0)
75870ed3 2815 (void)PerlProc_setuid(0);
2816#endif
985213f2 2817 (void)PerlProc_setuid(new_uid);
75870ed3 2818 } else {
cea2e8a9 2819 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2820 }
79072805
LW
2821#endif
2822#endif
85e6fe83 2823#endif
79072805 2824 break;
985213f2 2825 }
79072805 2826 case '>':
985213f2
AB
2827 {
2828 const UV new_euid = SvIV(sv);
2829 PL_delaymagic_euid = new_euid;
3280af22
NIS
2830 if (PL_delaymagic) {
2831 PL_delaymagic |= DM_EUID;
79072805
LW
2832 break; /* don't do magic till later */
2833 }
2834#ifdef HAS_SETEUID
985213f2 2835 (void)seteuid((Uid_t)new_euid);
79072805
LW
2836#else
2837#ifdef HAS_SETREUID
985213f2 2838 (void)setreuid((Uid_t)-1, (Uid_t)new_euid);
85e6fe83
LW
2839#else
2840#ifdef HAS_SETRESUID
985213f2 2841 (void)setresuid((Uid_t)-1, (Uid_t)new_euid, (Uid_t)-1);
79072805 2842#else
985213f2 2843 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
382669a9 2844 PerlProc_setuid(new_euid);
a0d0e21e 2845 else {
cea2e8a9 2846 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2847 }
79072805
LW
2848#endif
2849#endif
85e6fe83 2850#endif
79072805 2851 break;
985213f2 2852 }
79072805 2853 case '(':
985213f2
AB
2854 {
2855 const UV new_gid = SvIV(sv);
2856 PL_delaymagic_gid = new_gid;
3280af22
NIS
2857 if (PL_delaymagic) {
2858 PL_delaymagic |= DM_RGID;
79072805
LW
2859 break; /* don't do magic till later */
2860 }
2861#ifdef HAS_SETRGID
985213f2 2862 (void)setrgid((Gid_t)new_gid);
79072805
LW
2863#else
2864#ifdef HAS_SETREGID
985213f2 2865 (void)setregid((Gid_t)new_gid, (Gid_t)-1);
85e6fe83
LW
2866#else
2867#ifdef HAS_SETRESGID
985213f2 2868 (void)setresgid((Gid_t)new_gid, (Gid_t)-1, (Gid_t) -1);
79072805 2869#else
985213f2
AB
2870 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2871 (void)PerlProc_setgid(new_gid);
748a9306 2872 else {
cea2e8a9 2873 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2874 }
79072805
LW
2875#endif
2876#endif
85e6fe83 2877#endif
79072805 2878 break;
985213f2 2879 }
79072805 2880 case ')':
985213f2
AB
2881 {
2882 UV new_egid;
5cd24f17
PP
2883#ifdef HAS_SETGROUPS
2884 {
b83604b4 2885 const char *p = SvPV_const(sv, len);
757f63d8 2886 Groups_t *gary = NULL;
fb4089e0 2887#ifdef _SC_NGROUPS_MAX
2888 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2889
2890 if (maxgrp < 0)
2891 maxgrp = NGROUPS;
2892#else
2893 int maxgrp = NGROUPS;
2894#endif
757f63d8
SP
2895
2896 while (isSPACE(*p))
2897 ++p;
985213f2 2898 new_egid = Atol(p);
fb4089e0 2899 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP
2900 while (*p && !isSPACE(*p))
2901 ++p;
2902 while (isSPACE(*p))
2903 ++p;
2904 if (!*p)
2905 break;
2906 if(!gary)
2907 Newx(gary, i + 1, Groups_t);
2908 else
2909 Renew(gary, i + 1, Groups_t);
2910 gary[i] = Atol(p);
2911 }
2912 if (i)
2913 (void)setgroups(i, gary);
f5a63d97 2914 Safefree(gary);
5cd24f17
PP
2915 }
2916#else /* HAS_SETGROUPS */
985213f2 2917 new_egid = SvIV(sv);
5cd24f17 2918#endif /* HAS_SETGROUPS */
985213f2 2919 PL_delaymagic_egid = new_egid;
3280af22
NIS
2920 if (PL_delaymagic) {
2921 PL_delaymagic |= DM_EGID;
79072805
LW
2922 break; /* don't do magic till later */
2923 }
2924#ifdef HAS_SETEGID
985213f2 2925 (void)setegid((Gid_t)new_egid);
79072805
LW
2926#else
2927#ifdef HAS_SETREGID
985213f2 2928 (void)setregid((Gid_t)-1, (Gid_t)new_egid);
85e6fe83
LW
2929#else
2930#ifdef HAS_SETRESGID
985213f2 2931 (void)setresgid((Gid_t)-1, (Gid_t)new_egid, (Gid_t)-1);
79072805 2932#else
985213f2
AB
2933 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2934 (void)PerlProc_setgid(new_egid);
748a9306 2935 else {
cea2e8a9 2936 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2937 }
79072805
LW
2938#endif
2939#endif
85e6fe83 2940#endif
79072805 2941 break;
985213f2 2942 }
79072805 2943 case ':':
2d8e6c8d 2944 PL_chopset = SvPV_force(sv,len);
79072805 2945 break;
9cdac2a2
FC
2946 case '$': /* $$ */
2947 /* Store the pid in mg->mg_obj so we can tell when a fork has
2948 occurred. mg->mg_obj points to *$ by default, so clear it. */
2949 if (isGV(mg->mg_obj)) {
2950 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2951 SvREFCNT_dec(mg->mg_obj);
2952 mg->mg_flags |= MGf_REFCOUNTED;
2953 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2954 }
2955 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2956 break;
79072805 2957 case '0':
e2975953 2958 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2959#ifdef HAS_SETPROCTITLE
2960 /* The BSDs don't show the argv[] in ps(1) output, they
2961 * show a string from the process struct and provide
2962 * the setproctitle() routine to manipulate that. */
a2722ac9 2963 if (PL_origalen != 1) {
b83604b4 2964 s = SvPV_const(sv, len);
98b76f99 2965# if __FreeBSD_version > 410001
9aad2c0e 2966 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2967 * but not the "(perl) suffix from the ps(1)
2968 * output, because that's what ps(1) shows if the
2969 * argv[] is modified. */
6f2ad931 2970 setproctitle("-%s", s);
9aad2c0e 2971# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2972 /* This doesn't really work if you assume that
2973 * $0 = 'foobar'; will wipe out 'perl' from the $0
2974 * because in ps(1) output the result will be like
2975 * sprintf("perl: %s (perl)", s)
2976 * I guess this is a security feature:
2977 * one (a user process) cannot get rid of the original name.
2978 * --jhi */
2979 setproctitle("%s", s);
2980# endif
2981 }
9d3968b2 2982#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2983 if (PL_origalen != 1) {
17aa7f3d 2984 union pstun un;
b83604b4 2985 s = SvPV_const(sv, len);
6867be6d 2986 un.pst_command = (char *)s;
17aa7f3d
JH
2987 pstat(PSTAT_SETCMD, un, len, 0, 0);
2988 }
9d3968b2 2989#else
2d2af554
GA
2990 if (PL_origalen > 1) {
2991 /* PL_origalen is set in perl_parse(). */
2992 s = SvPV_force(sv,len);
2993 if (len >= (STRLEN)PL_origalen-1) {
2994 /* Longer than original, will be truncated. We assume that
2995 * PL_origalen bytes are available. */
2996 Copy(s, PL_origargv[0], PL_origalen-1, char);
2997 }
2998 else {
2999 /* Shorter than original, will be padded. */
235ac35d 3000#ifdef PERL_DARWIN
60777a0d
JH
3001 /* Special case for Mac OS X: see [perl #38868] */
3002 const int pad = 0;
235ac35d 3003#else
8a89a4f1
MB
3004 /* Is the space counterintuitive? Yes.
3005 * (You were expecting \0?)
3006 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3007 * --jhi */
60777a0d 3008 const int pad = ' ';
235ac35d 3009#endif
60777a0d
JH
3010 Copy(s, PL_origargv[0], len, char);
3011 PL_origargv[0][len] = 0;
3012 memset(PL_origargv[0] + len + 1,
3013 pad, PL_origalen - len - 1);
2d2af554
GA
3014 }
3015 PL_origargv[0][PL_origalen-1] = 0;
3016 for (i = 1; i < PL_origargc; i++)
3017 PL_origargv[i] = 0;
7636ea95
AB
3018#ifdef HAS_PRCTL_SET_NAME
3019 /* Set the legacy process name in addition to the POSIX name on Linux */
3020 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3021 /* diag_listed_as: SKIPME */
3022 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3023 }
3024#endif
79072805 3025 }
9d3968b2 3026#endif
e2975953 3027 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW
3028 break;
3029 }
3030 return 0;
3031}
3032
3033I32
84c7b88c
BF
3034Perl_whichsig_sv(pTHX_ SV *sigsv)
3035{
3036 const char *sigpv;
3037 STRLEN siglen;
3038 PERL_ARGS_ASSERT_WHICHSIG_SV;
3039 PERL_UNUSED_CONTEXT;
3040 sigpv = SvPV_const(sigsv, siglen);
3041 return whichsig_pvn(sigpv, siglen);
3042}
3043
3044I32
3045Perl_whichsig_pv(pTHX_ const char *sig)
3046{
3047 PERL_ARGS_ASSERT_WHICHSIG_PV;
3048 PERL_UNUSED_CONTEXT;
3049 return whichsig_pvn(sig, strlen(sig));
3050}
3051
3052I32
3053Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
79072805 3054{
aadb217d 3055 register char* const* sigv;
7918f24d 3056
84c7b88c 3057 PERL_ARGS_ASSERT_WHICHSIG_PVN;
96a5add6 3058 PERL_UNUSED_CONTEXT;
79072805 3059
aadb217d 3060 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
84c7b88c 3061 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
aadb217d 3062 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805 3063#ifdef SIGCLD
84c7b88c 3064 if (memEQs(sig, len, "CHLD"))
79072805
LW
3065 return SIGCLD;
3066#endif
3067#ifdef SIGCHLD
84c7b88c 3068 if (memEQs(sig, len, "CLD"))
79072805
LW
3069 return SIGCHLD;
3070#endif
7f1236c0 3071 return -1;
79072805
LW
3072}
3073
ecfc5424 3074Signal_t
1e82f5a6 3075#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3076Perl_sighandler(int sig, siginfo_t *sip, void *uap)
1e82f5a6
SH
3077#else
3078Perl_sighandler(int sig)
3079#endif
79072805 3080{
1018e26f
NIS
3081#ifdef PERL_GET_SIG_CONTEXT
3082 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 3083#else
cea2e8a9 3084 dTHX;
71d280e3 3085#endif
79072805 3086 dSP;
a0714e2c
SS
3087 GV *gv = NULL;
3088 SV *sv = NULL;
8772537c 3089 SV * const tSv = PL_Sv;
601f1833 3090 CV *cv = NULL;
533c011a 3091 OP *myop = PL_op;
84902520 3092 U32 flags = 0;
8772537c 3093 XPV * const tXpv = PL_Xpv;
0c4d3b5e 3094 I32 old_ss_ix = PL_savestack_ix;
71d280e3 3095
84902520 3096
727405f8 3097 if (!PL_psig_ptr[sig]) {
99ef548b 3098 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
3099 PL_sig_name[sig]);
3100 exit(sig);
3101 }
ff0cee69 3102
a0d63a7b
DM
3103 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3104 /* Max number of items pushed there is 3*n or 4. We cannot fix
3105 infinity, so we fix 4 (in fact 5): */
3106 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3107 flags |= 1;
3108 PL_savestack_ix += 5; /* Protect save in progress. */
3109 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3110 }
84902520 3111 }
84902520 3112 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 3113 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL
3114 || SvTYPE(cv) != SVt_PVCV) {
3115 HV *st;
f2c0649b 3116 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 3117 }
84902520 3118
a0d0e21e 3119 if (!cv || !CvROOT(cv)) {
a2a5de95
NC
3120 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3121 PL_sig_name[sig], (gv ? GvENAME(gv)
3122 : ((cv && CvGV(cv))
3123 ? GvENAME(CvGV(cv))
3124 : "__ANON__")));
00d579c5 3125 goto cleanup;
79072805
LW
3126 }
3127
0c4d3b5e
DM
3128 sv = PL_psig_name[sig]
3129 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3130 : newSVpv(PL_sig_name[sig],0);
72048cfe 3131 flags |= 8;
0c4d3b5e
DM
3132 SAVEFREESV(sv);
3133
a0d63a7b
DM
3134 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3135 /* make sure our assumption about the size of the SAVEs are correct:
3136 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3137 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3138 }
e336de0d 3139
e788e7d3 3140 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 3141 PUSHMARK(SP);
79072805 3142 PUSHs(sv);
8aad04aa
JH
3143#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3144 {
3145 struct sigaction oact;
3146
3147 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH
3148 if (sip) {
3149 HV *sih = newHV();
ad64d0ec 3150 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH
3151 /* The siginfo fields signo, code, errno, pid, uid,
3152 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC
3153 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3154 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 3155#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
3156 hv_stores(sih, "errno", newSViv(sip->si_errno));
3157 hv_stores(sih, "status", newSViv(sip->si_status));
3158 hv_stores(sih, "uid", newSViv(sip->si_uid));
3159 hv_stores(sih, "pid", newSViv(sip->si_pid));
3160 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3161 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 3162#endif
8aad04aa 3163 EXTEND(SP, 2);
ad64d0ec 3164 PUSHs(rv);
22f1178f 3165 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 3166 }
b4552a27 3167
8aad04aa
JH
3168 }
3169 }
3170#endif
79072805 3171 PUTBACK;
a0d0e21e 3172
ad64d0ec 3173 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 3174
d3acc0f7 3175 POPSTACK;
1b266415 3176 if (SvTRUE(ERRSV)) {
c22d665b 3177#ifndef PERL_MICRO
1b266415
NIS
3178 /* Handler "died", for example to get out of a restart-able read().
3179 * Before we re-do that on its behalf re-enable the signal which was
3180 * blocked by the system when we entered.
3181 */
c22d665b 3182#ifdef HAS_SIGPROCMASK
d488af49 3183#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3184 if (sip || uap)
c22d665b
LT
3185#endif
3186 {
3187 sigset_t set;
3188 sigemptyset(&set);
3189 sigaddset(&set,sig);
3190 sigprocmask(SIG_UNBLOCK, &set, NULL);
3191 }
3192#else
1b266415
NIS
3193 /* Not clear if this will work */
3194 (void)rsignal(sig, SIG_IGN);
5c1546dc 3195 (void)rsignal(sig, PL_csighandlerp);
c22d665b
LT
3196#endif
3197#endif /* !PERL_MICRO */
c5df3096 3198 die_sv(ERRSV);
1b266415 3199 }
00d579c5 3200cleanup:
0c4d3b5e
DM
3201 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3202 PL_savestack_ix = old_ss_ix;
72048cfe 3203 if (flags & 8)
84902520 3204 SvREFCNT_dec(sv);
533c011a 3205 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3206
3280af22
NIS
3207 PL_Sv = tSv; /* Restore global temporaries. */
3208 PL_Xpv = tXpv;
53bb94e2 3209 return;
79072805 3210}
4e35701f
NIS
3211
3212
51371543 3213static void
8772537c 3214S_restore_magic(pTHX_ const void *p)
51371543 3215{
97aff369 3216 dVAR;
8772537c
AL
3217 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3218 SV* const sv = mgs->mgs_sv;
150b625d 3219 bool bumped;
51371543
GS
3220
3221 if (!sv)
3222 return;
3223
3224 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
3225 {
f8c7b90f 3226#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
3227 /* While magic was saved (and off) sv_setsv may well have seen
3228 this SV as a prime candidate for COW. */
3229 if (SvIsCOW(sv))
e424a81e 3230 sv_force_normal_flags(sv, 0);
f9701176
NC
3231#endif
3232
f9c6fee5
CS
3233 if (mgs->mgs_readonly)
3234 SvREADONLY_on(sv);
3235 if (mgs->mgs_magical)
3236 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS
3237 else
3238 mg_magical(sv);
2b77b520
YST
3239 if (SvGMAGICAL(sv)) {
3240 /* downgrade public flags to private,
3241 and discard any other private flags */
3242
10edeb5d
JH
3243 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
3244 if (pubflags) {
3245 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
3246 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
3247 }
3248 }
51371543
GS
3249 }
3250
150b625d 3251 bumped = mgs->mgs_bumped;
51371543
GS
3252 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3253
3254 /* If we're still on top of the stack, pop us off. (That condition
3255 * will be satisfied if restore_magic was called explicitly, but *not*
3256 * if it's being called via leave_scope.)
3257 * The reason for doing this is that otherwise, things like sv_2cv()
3258 * may leave alloc gunk on the savestack, and some code
3259 * (e.g. sighandler) doesn't expect that...
3260 */
3261 if (PL_savestack_ix == mgs->mgs_ss_ix)
3262 {
1be36ce0
NC
3263 UV popval = SSPOPUV;
3264 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3265 PL_savestack_ix -= 2;
1be36ce0
NC
3266 popval = SSPOPUV;
3267 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3268 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543 3269 }
150b625d
DM
3270 if (bumped) {
3271 if (SvREFCNT(sv) == 1) {
3272 /* We hold the last reference to this SV, which implies that the
3273 SV was deleted as a side effect of the routines we called.
3274 So artificially keep it alive a bit longer.
3275 We avoid turning on the TEMP flag, which can cause the SV's
3276 buffer to get stolen (and maybe other stuff). */
3277 int was_temp = SvTEMP(sv);
3278 sv_2mortal(sv);
3279 if (!was_temp) {
3280 SvTEMP_off(sv);
3281 }
3282 SvOK_off(sv);
8985fe98 3283 }
150b625d
DM
3284 else
3285 SvREFCNT_dec(sv); /* undo the inc in S_save_magic() */
8985fe98 3286 }
51371543
GS
3287}
3288
0c4d3b5e
DM
3289/* clean up the mess created by Perl_sighandler().
3290 * Note that this is only called during an exit in a signal handler;
3291 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
9a7f166c 3292 * skipped over. */
0c4d3b5e 3293
51371543 3294static void
8772537c 3295S_unwind_handler_stack(pTHX_ const void *p)
51371543 3296{
27da23d5 3297 dVAR;
0c4d3b5e 3298 PERL_UNUSED_ARG(p);
7918f24d 3299
0c4d3b5e 3300 PL_savestack_ix -= 5; /* Unprotect save in progress. */
51371543 3301}
1018e26f 3302
66610fdd 3303/*
b3ca2e83
NC
3304=for apidoc magic_sethint
3305
3306Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3307C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3308anything that would need a deep copy. Maybe we should warn if we find a
3309reference.
b3ca2e83
NC
3310
3311=cut
3312*/
3313int
3314Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3315{
3316 dVAR;
ad64d0ec 3317 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
59cd0e26 3318 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
b3ca2e83 3319
7918f24d
NC
3320 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3321
e6e3e454
NC
3322 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3323 an alternative leaf in there, with PL_compiling.cop_hints being used if
3324 it's NULL. If needed for threads, the alternative could lock a mutex,
3325 or take other more complex action. */
3326
5b9c0671
NC
3327 /* Something changed in %^H, so it will need to be restored on scope exit.
3328 Doing this here saves a lot of doing it manually in perl code (and
3329 forgetting to do it, and consequent subtle errors. */
3330 PL_hints |= HINT_LOCALIZE_HH;
20439bc7
Z
3331 CopHINTHASH_set(&PL_compiling,
3332 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
b3ca2e83
NC
3333 return 0;
3334}
3335
3336/*
f175cff5 3337=for apidoc magic_clearhint
b3ca2e83 3338
c28fe1ec
NC
3339Triggered by a delete from %^H, records the key to
3340C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3341
3342=cut
3343*/
3344int
3345Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3346{
3347 dVAR;
7918f24d
NC
3348
3349 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
f5a63d97
AL
3350 PERL_UNUSED_ARG(sv);
3351
5b9c0671 3352 PL_hints |= HINT_LOCALIZE_HH;
20439bc7 3353 CopHINTHASH_set(&PL_compiling,
e3352591
FC
3354 mg->mg_len == HEf_SVKEY
3355 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3356 MUTABLE_SV(mg->mg_ptr), 0, 0)
3357 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3358 mg->mg_ptr, mg->mg_len, 0, 0));
b3ca2e83
NC
3359 return 0;
3360}
3361
3362/*
f747ebd6
Z
3363=for apidoc magic_clearhints
3364
3365Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3366
3367=cut
3368*/
3369int
3370Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3371{
3372 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3373 PERL_UNUSED_ARG(sv);
3374 PERL_UNUSED_ARG(mg);
20439bc7
Z
3375 cophh_free(CopHINTHASH_get(&PL_compiling));
3376 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
f747ebd6
Z
3377 return 0;
3378}
3379
09fb282d
FC
3380int
3381Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3382 const char *name, I32 namlen)
3383{
3384 MAGIC *nmg;
3385
3386 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
3387 PERL_UNUSED_ARG(name);
3388 PERL_UNUSED_ARG(namlen);
3389
3390 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3391 nmg = mg_find(nsv, mg->mg_type);
3392 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3393 nmg->mg_ptr = mg->mg_ptr;
3394 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3395 nmg->mg_flags |= MGf_REFCOUNTED;
3396 return 1;
3397}
3398
f747ebd6 3399/*
66610fdd
RGS
3400 * Local variables:
3401 * c-indentation-style: bsd
3402 * c-basic-offset: 4
14d04a33 3403 * indent-tabs-mode: nil
66610fdd
RGS
3404 * End:
3405 *
14d04a33 3406 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3407 */