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a0d0e21e 1/* mg.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent.
14 *
15 * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"]
79072805
LW
16 */
17
ccfc67b7
JH
18/*
19=head1 Magical Functions
166f8a29
DM
20
21"Magic" is special data attached to SV structures in order to give them
22"magical" properties. When any Perl code tries to read from, or assign to,
23an SV marked as magical, it calls the 'get' or 'set' function associated
24with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 25give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
26number of the last read filehandle into to the SV's IV slot), while
27set is called after an SV has been written to, in order to allow it to make
ddfa107c 28use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
29PL_rs global variable).
30
31Magic is implemented as a linked list of MAGIC structures attached to the
32SV. Each MAGIC struct holds the type of the magic, a pointer to an array
33of functions that implement the get(), set(), length() etc functions,
34plus space for some flags and pointers. For example, a tied variable has
35a MAGIC structure that contains a pointer to the object associated with the
36tie.
37
ccfc67b7
JH
38*/
39
79072805 40#include "EXTERN.h"
864dbfa3 41#define PERL_IN_MG_C
79072805
LW
42#include "perl.h"
43
5cd24f17 44#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
45# ifdef I_GRP
46# include <grp.h>
47# endif
188ea221
CS
48#endif
49
757f63d8
SP
50#if defined(HAS_SETGROUPS)
51# ifndef NGROUPS
52# define NGROUPS 32
53# endif
54#endif
55
17aa7f3d
JH
56#ifdef __hpux
57# include <sys/pstat.h>
58#endif
59
7636ea95
AB
60#ifdef HAS_PRCTL_SET_NAME
61# include <sys/prctl.h>
62#endif
63
8aad04aa 64#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 65Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 66#else
e69880a5 67Signal_t Perl_csighandler(int sig);
8aad04aa 68#endif
e69880a5 69
9cffb111
OS
70#ifdef __Lynx__
71/* Missing protos on LynxOS */
72void setruid(uid_t id);
73void seteuid(uid_t id);
74void setrgid(uid_t id);
75void setegid(uid_t id);
76#endif
77
c07a80fd 78/*
4bac9ae4 79 * Pre-magic setup and post-magic takedown.
c07a80fd
PP
80 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
81 */
82
83struct magic_state {
84 SV* mgs_sv;
455ece5e 85 I32 mgs_ss_ix;
f9c6fee5
CS
86 U32 mgs_magical;
87 bool mgs_readonly;
150b625d 88 bool mgs_bumped;
c07a80fd 89};
455ece5e 90/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
91
92STATIC void
ff44333e 93S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags)
c07a80fd 94{
97aff369 95 dVAR;
455ece5e 96 MGS* mgs;
150b625d 97 bool bumped = FALSE;
7918f24d 98
ff44333e 99 PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS;
7918f24d 100
4bac9ae4
CS
101 assert(SvMAGICAL(sv));
102
150b625d
DM
103 /* we shouldn't really be called here with RC==0, but it can sometimes
104 * happen via mg_clear() (which also shouldn't be called when RC==0,
105 * but it can happen). Handle this case gracefully(ish) by not RC++
106 * and thus avoiding the resultant double free */
107 if (SvREFCNT(sv) > 0) {
108 /* guard against sv getting freed midway through the mg clearing,
109 * by holding a private reference for the duration. */
110 SvREFCNT_inc_simple_void_NN(sv);
111 bumped = TRUE;
112 }
8985fe98 113
8772537c 114 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
115
116 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd 117 mgs->mgs_sv = sv;
f9c6fee5 118 mgs->mgs_magical = SvMAGICAL(sv);
46959f1c 119 mgs->mgs_readonly = SvREADONLY(sv) != 0;
455ece5e 120 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
150b625d 121 mgs->mgs_bumped = bumped;
c07a80fd 122
ff44333e 123 SvFLAGS(sv) &= ~flags;
3805b5fb 124 SvREADONLY_off(sv);
c07a80fd
PP
125}
126
ff44333e
FC
127#define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG)
128
954c1994
GS
129/*
130=for apidoc mg_magical
131
132Turns on the magical status of an SV. See C<sv_magic>.
133
134=cut
135*/
136
8990e307 137void
864dbfa3 138Perl_mg_magical(pTHX_ SV *sv)
8990e307 139{
e1ec3a88 140 const MAGIC* mg;
7918f24d 141 PERL_ARGS_ASSERT_MG_MAGICAL;
96a5add6 142 PERL_UNUSED_CONTEXT;
f9c6fee5
CS
143
144 SvMAGICAL_off(sv);
218787bd 145 if ((mg = SvMAGIC(sv))) {
218787bd
VP
146 do {
147 const MGVTBL* const vtbl = mg->mg_virtual;
148 if (vtbl) {
149 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
150 SvGMAGICAL_on(sv);
151 if (vtbl->svt_set)
152 SvSMAGICAL_on(sv);
153 if (vtbl->svt_clear)
154 SvRMAGICAL_on(sv);
155 }
156 } while ((mg = mg->mg_moremagic));
157 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
158 SvRMAGICAL_on(sv);
8990e307
LW
159 }
160}
161
954c1994
GS
162/*
163=for apidoc mg_get
164
4b1e7f06
DD
165Do magic before a value is retrieved from the SV. The type of SV must
166be >= SVt_PVMG. See C<sv_magic>.
954c1994
GS
167
168=cut
169*/
170
79072805 171int
864dbfa3 172Perl_mg_get(pTHX_ SV *sv)
79072805 173{
97aff369 174 dVAR;
35a4481c 175 const I32 mgs_ix = SSNEW(sizeof(MGS));
a9844598 176 bool saved = FALSE;
f9c6fee5 177 bool have_new = 0;
ff76feab 178 MAGIC *newmg, *head, *cur, *mg;
6683b158 179
7918f24d
NC
180 PERL_ARGS_ASSERT_MG_GET;
181
407287f9
FC
182 if (PL_localizing == 1 && sv == DEFSV) return 0;
183
ff76feab
AMS
184 /* We must call svt_get(sv, mg) for each valid entry in the linked
185 list of magic. svt_get() may delete the current entry, add new
186 magic to the head of the list, or upgrade the SV. AMS 20010810 */
187
188 newmg = cur = head = mg = SvMAGIC(sv);
189 while (mg) {
35a4481c 190 const MGVTBL * const vtbl = mg->mg_virtual;
f9c6fee5 191 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
ff76feab 192
2b260de0 193 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
a9844598
CS
194
195 /* taint's mg get is so dumb it doesn't need flag saving */
196 if (!saved && mg->mg_type != PERL_MAGIC_taint) {
197 save_magic(mgs_ix, sv);
198 saved = TRUE;
199 }
200
16c91539 201 vtbl->svt_get(aTHX_ sv, mg);
b77f7d40 202
58f82c5c
DM
203 /* guard against magic having been deleted - eg FETCH calling
204 * untie */
f9c6fee5
CS
205 if (!SvMAGIC(sv)) {
206 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
58f82c5c 207 break;
f9c6fee5 208 }
b77f7d40 209
f9c6fee5 210 /* recalculate flags if this entry was deleted. */
ff76feab 211 if (mg->mg_flags & MGf_GSKIP)
f9c6fee5 212 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
a0d0e21e 213 }
7d1328bb
FC
214 else if (vtbl == &PL_vtbl_utf8) {
215 /* get-magic can reallocate the PV */
216 magic_setutf8(sv, mg);
217 }
ff76feab 218
f9c6fee5 219 mg = nextmg;
ff76feab 220
0723351e 221 if (have_new) {
ff76feab
AMS
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
224 if (mg == head) {
0723351e 225 have_new = 0;
ff76feab
AMS
226 mg = cur;
227 head = newmg;
228 }
229 }
230
231 /* Were any new entries added? */
0723351e
NC
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
233 have_new = 1;
ff76feab
AMS
234 cur = mg;
235 mg = newmg;
f9c6fee5 236 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
760ac839 237 }
79072805 238 }
463ee0b2 239
a9844598
CS
240 if (saved)
241 restore_magic(INT2PTR(void *, (IV)mgs_ix));
242
79072805
LW
243 return 0;
244}
245
954c1994
GS
246/*
247=for apidoc mg_set
248
249Do magic after a value is assigned to the SV. See C<sv_magic>.
250
251=cut
252*/
253
79072805 254int
864dbfa3 255Perl_mg_set(pTHX_ SV *sv)
79072805 256{
97aff369 257 dVAR;
35a4481c 258 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 259 MAGIC* mg;
463ee0b2
LW
260 MAGIC* nextmg;
261
7918f24d
NC
262 PERL_ARGS_ASSERT_MG_SET;
263
b5ed8c44
FC
264 if (PL_localizing == 2 && sv == DEFSV) return 0;
265
ff44333e 266 save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */
463ee0b2
LW
267
268 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 269 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 270 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
271 if (mg->mg_flags & MGf_GSKIP) {
272 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
f9c6fee5 273 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
a0d0e21e 274 }
e0a73de4 275 if (PL_localizing == 2
b5ed8c44 276 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
e7cbf6c6 277 continue;
2b260de0 278 if (vtbl && vtbl->svt_set)
16c91539 279 vtbl->svt_set(aTHX_ sv, mg);
79072805 280 }
463ee0b2 281
8772537c 282 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
283 return 0;
284}
285
954c1994
GS
286/*
287=for apidoc mg_length
288
d4e99c76 289Reports on the SV's length in bytes, calling length magic if available,
bd8446cf
FC
290but does not set the UTF8 flag on the sv. It will fall back to 'get'
291magic if there is no 'length' magic, but with no indication as to
292whether it called 'get' magic. It assumes the sv is a PVMG or
293higher. Use sv_len() instead.
954c1994
GS
294
295=cut
296*/
297
79072805 298U32
864dbfa3 299Perl_mg_length(pTHX_ SV *sv)
79072805 300{
97aff369 301 dVAR;
79072805 302 MAGIC* mg;
463ee0b2 303 STRLEN len;
463ee0b2 304
7918f24d
NC
305 PERL_ARGS_ASSERT_MG_LENGTH;
306
79072805 307 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 308 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 309 if (vtbl && vtbl->svt_len) {
35a4481c 310 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 311 save_magic(mgs_ix, sv);
a0d0e21e 312 /* omit MGf_GSKIP -- not changed here */
16c91539 313 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 314 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
315 return len;
316 }
317 }
318
bd8446cf 319 (void)SvPV_const(sv, len);
463ee0b2 320 return len;
79072805
LW
321}
322
8fb26106 323I32
864dbfa3 324Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
325{
326 MAGIC* mg;
ac27b0f5 327
7918f24d
NC
328 PERL_ARGS_ASSERT_MG_SIZE;
329
93965878 330 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 331 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 332 if (vtbl && vtbl->svt_len) {
35a4481c
AL
333 const I32 mgs_ix = SSNEW(sizeof(MGS));
334 I32 len;
455ece5e 335 save_magic(mgs_ix, sv);
93965878 336 /* omit MGf_GSKIP -- not changed here */
16c91539 337 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 338 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
339 return len;
340 }
341 }
342
343 switch(SvTYPE(sv)) {
344 case SVt_PVAV:
502c6561 345 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
93965878
NIS
346 case SVt_PVHV:
347 /* FIXME */
348 default:
cea2e8a9 349 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
350 break;
351 }
352 return 0;
353}
354
954c1994
GS
355/*
356=for apidoc mg_clear
357
358Clear something magical that the SV represents. See C<sv_magic>.
359
360=cut
361*/
362
79072805 363int
864dbfa3 364Perl_mg_clear(pTHX_ SV *sv)
79072805 365{
35a4481c 366 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 367 MAGIC* mg;
8ac77ac9 368 MAGIC *nextmg;
463ee0b2 369
7918f24d
NC
370 PERL_ARGS_ASSERT_MG_CLEAR;
371
455ece5e 372 save_magic(mgs_ix, sv);
463ee0b2 373
8ac77ac9 374 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
35a4481c 375 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 376 /* omit GSKIP -- never set here */
727405f8 377
8ac77ac9
NC
378 nextmg = mg->mg_moremagic; /* it may delete itself */
379
2b260de0 380 if (vtbl && vtbl->svt_clear)
16c91539 381 vtbl->svt_clear(aTHX_ sv, mg);
79072805 382 }
463ee0b2 383
8772537c 384 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
385 return 0;
386}
387
ed624ca8 388static MAGIC*
39de7f53
FR
389S_mg_findext_flags(pTHX_ const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
390{
391 PERL_UNUSED_CONTEXT;
392
393 assert(flags <= 1);
394
395 if (sv) {
396 MAGIC *mg;
397
7db6405c
FC
398 assert(!(SvTYPE(sv) == SVt_PVAV && AvPAD_NAMELIST(sv)));
399
39de7f53
FR
400 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
401 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
402 return mg;
403 }
404 }
405 }
406
407 return NULL;
408}
409
954c1994
GS
410/*
411=for apidoc mg_find
412
413Finds the magic pointer for type matching the SV. See C<sv_magic>.
414
415=cut
416*/
417
93a17b20 418MAGIC*
35a4481c 419Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 420{
39de7f53
FR
421 return S_mg_findext_flags(aTHX_ sv, type, NULL, 0);
422}
423
424/*
425=for apidoc mg_findext
426
427Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
428C<sv_magicext>.
429
430=cut
431*/
432
433MAGIC*
434Perl_mg_findext(pTHX_ const SV *sv, int type, const MGVTBL *vtbl)
435{
436 return S_mg_findext_flags(aTHX_ sv, type, vtbl, 1);
93a17b20
LW
437}
438
96c2a8ff
FC
439MAGIC *
440Perl_mg_find_mglob(pTHX_ SV *sv)
441{
442 PERL_ARGS_ASSERT_MG_FIND_MGLOB;
443 if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') {
444 /* This sv is only a delegate. //g magic must be attached to
445 its target. */
446 vivify_defelem(sv);
447 sv = LvTARG(sv);
448 }
449 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
450 return S_mg_findext_flags(aTHX_ sv, PERL_MAGIC_regex_global, 0, 0);
451 return NULL;
452}
453
954c1994
GS
454/*
455=for apidoc mg_copy
456
457Copies the magic from one SV to another. See C<sv_magic>.
458
459=cut
460*/
461
79072805 462int
864dbfa3 463Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 464{
463ee0b2 465 int count = 0;
79072805 466 MAGIC* mg;
7918f24d
NC
467
468 PERL_ARGS_ASSERT_MG_COPY;
469
463ee0b2 470 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 471 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93 472 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
16c91539 473 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
68795e93 474 }
823a54a3
AL
475 else {
476 const char type = mg->mg_type;
1e73acc8 477 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
478 sv_magic(nsv,
479 (type == PERL_MAGIC_tied)
480 ? SvTIED_obj(sv, mg)
481 : (type == PERL_MAGIC_regdata && mg->mg_obj)
482 ? sv
483 : mg->mg_obj,
484 toLOWER(type), key, klen);
485 count++;
486 }
79072805 487 }
79072805 488 }
463ee0b2 489 return count;
79072805
LW
490}
491
954c1994 492/*
0cbee0a4
DM
493=for apidoc mg_localize
494
9711599e
CS
495Copy some of the magic from an existing SV to new localized version of that
496SV. Container magic (eg %ENV, $1, tie) gets copied, value magic doesn't (eg
497taint, pos).
498
af7df257 499If setmagic is false then no set magic will be called on the new (empty) SV.
9711599e
CS
500This typically means that assignment will soon follow (e.g. 'local $x = $y'),
501and that will handle the magic.
0cbee0a4
DM
502
503=cut
504*/
505
506void
af7df257 507Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
0cbee0a4 508{
97aff369 509 dVAR;
0cbee0a4 510 MAGIC *mg;
7918f24d
NC
511
512 PERL_ARGS_ASSERT_MG_LOCALIZE;
513
658a9f31
JD
514 if (nsv == DEFSV)
515 return;
516
0cbee0a4 517 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 518 const MGVTBL* const vtbl = mg->mg_virtual;
e0a73de4 519 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
0cbee0a4 520 continue;
0cbee0a4 521
a5063e7c 522 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
16c91539 523 (void)vtbl->svt_local(aTHX_ nsv, mg);
a5063e7c 524 else
0cbee0a4
DM
525 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
526 mg->mg_ptr, mg->mg_len);
a5063e7c 527
0cbee0a4 528 /* container types should remain read-only across localization */
9ff3e6d8 529 SvFLAGS(nsv) |= SvREADONLY(sv);
0cbee0a4
DM
530 }
531
532 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
533 SvFLAGS(nsv) |= SvMAGICAL(sv);
af7df257 534 if (setmagic) {
9711599e
CS
535 PL_localizing = 1;
536 SvSETMAGIC(nsv);
537 PL_localizing = 0;
538 }
0cbee0a4
DM
539 }
540}
541
d9088386
Z
542#define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
543static void
544S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
545{
546 const MGVTBL* const vtbl = mg->mg_virtual;
547 if (vtbl && vtbl->svt_free)
548 vtbl->svt_free(aTHX_ sv, mg);
549 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
550 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
551 Safefree(mg->mg_ptr);
552 else if (mg->mg_len == HEf_SVKEY)
553 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
554 }
555 if (mg->mg_flags & MGf_REFCOUNTED)
556 SvREFCNT_dec(mg->mg_obj);
557 Safefree(mg);
558}
559
0cbee0a4 560/*
954c1994
GS
561=for apidoc mg_free
562
563Free any magic storage used by the SV. See C<sv_magic>.
564
565=cut
566*/
567
79072805 568int
864dbfa3 569Perl_mg_free(pTHX_ SV *sv)
79072805
LW
570{
571 MAGIC* mg;
572 MAGIC* moremagic;
7918f24d
NC
573
574 PERL_ARGS_ASSERT_MG_FREE;
575
79072805 576 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
79072805 577 moremagic = mg->mg_moremagic;
d9088386 578 mg_free_struct(sv, mg);
c826f41b 579 SvMAGIC_set(sv, moremagic);
79072805 580 }
b162af07 581 SvMAGIC_set(sv, NULL);
68f8932e 582 SvMAGICAL_off(sv);
79072805
LW
583 return 0;
584}
585
d9088386
Z
586/*
587=for apidoc Am|void|mg_free_type|SV *sv|int how
588
589Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
590
591=cut
592*/
593
594void
595Perl_mg_free_type(pTHX_ SV *sv, int how)
596{
597 MAGIC *mg, *prevmg, *moremg;
598 PERL_ARGS_ASSERT_MG_FREE_TYPE;
599 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
600 MAGIC *newhead;
601 moremg = mg->mg_moremagic;
602 if (mg->mg_type == how) {
603 /* temporarily move to the head of the magic chain, in case
604 custom free code relies on this historical aspect of mg_free */
605 if (prevmg) {
606 prevmg->mg_moremagic = moremg;
607 mg->mg_moremagic = SvMAGIC(sv);
608 SvMAGIC_set(sv, mg);
609 }
610 newhead = mg->mg_moremagic;
611 mg_free_struct(sv, mg);
612 SvMAGIC_set(sv, newhead);
613 mg = prevmg;
614 }
615 }
616 mg_magical(sv);
617}
618
79072805 619#include <signal.h>
79072805 620
942e002e 621U32
864dbfa3 622Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 623{
97aff369 624 dVAR;
8772537c 625 PERL_UNUSED_ARG(sv);
6cef1e77 626
7918f24d
NC
627 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
628
0bd48802 629 if (PL_curpm) {
eb578fdb 630 const REGEXP * const rx = PM_GETRE(PL_curpm);
0bd48802 631 if (rx) {
a678b0e4
YO
632 if (mg->mg_obj) { /* @+ */
633 /* return the number possible */
07bc277f 634 return RX_NPARENS(rx);
a678b0e4 635 } else { /* @- */
07bc277f 636 I32 paren = RX_LASTPAREN(rx);
a678b0e4
YO
637
638 /* return the last filled */
f46c4081 639 while ( paren >= 0
07bc277f
NC
640 && (RX_OFFS(rx)[paren].start == -1
641 || RX_OFFS(rx)[paren].end == -1) )
f46c4081 642 paren--;
a678b0e4
YO
643 return (U32)paren;
644 }
0bd48802 645 }
8f580fb8 646 }
ac27b0f5 647
942e002e 648 return (U32)-1;
6cef1e77
IZ
649}
650
6502e081
DM
651/* @-, @+ */
652
6cef1e77 653int
864dbfa3 654Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 655{
97aff369 656 dVAR;
7918f24d
NC
657
658 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
659
0bd48802 660 if (PL_curpm) {
eb578fdb 661 const REGEXP * const rx = PM_GETRE(PL_curpm);
0bd48802 662 if (rx) {
eb578fdb 663 const I32 paren = mg->mg_len;
a10eae29
FC
664 SSize_t s;
665 SSize_t t;
0bd48802
AL
666 if (paren < 0)
667 return 0;
07bc277f
NC
668 if (paren <= (I32)RX_NPARENS(rx) &&
669 (s = RX_OFFS(rx)[paren].start) != -1 &&
670 (t = RX_OFFS(rx)[paren].end) != -1)
0bd48802 671 {
a10eae29 672 SSize_t i;
0bd48802
AL
673 if (mg->mg_obj) /* @+ */
674 i = t;
675 else /* @- */
676 i = s;
677
a10eae29 678 if (RX_MATCH_UTF8(rx)) {
07bc277f 679 const char * const b = RX_SUBBEG(rx);
0bd48802 680 if (b)
6502e081
DM
681 i = RX_SUBCOFFSET(rx) +
682 utf8_length((U8*)b,
683 (U8*)(b-RX_SUBOFFSET(rx)+i));
0bd48802 684 }
727405f8 685
a10eae29 686 sv_setuv(sv, i);
232af1f8 687 return 0;
1aa99e6b 688 }
0bd48802 689 }
6cef1e77 690 }
232af1f8 691 sv_setsv(sv, NULL);
6cef1e77
IZ
692 return 0;
693}
694
6502e081
DM
695/* @-, @+ */
696
e4b89193 697int
a29d06ed
MG
698Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
699{
7918f24d 700 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
d4c19fe8
AL
701 PERL_UNUSED_ARG(sv);
702 PERL_UNUSED_ARG(mg);
cb077ed2 703 Perl_croak_no_modify();
0dbb1585 704 NORETURN_FUNCTION_END;
a29d06ed
MG
705}
706
ad3296c6 707#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
708 if (SvPOK(sv)) { \
709 STRLEN len = SvCUR(sv); \
710 char * const p = SvPVX(sv); \
8e6b4db6
PC
711 while (len > 0 && isSPACE(p[len-1])) \
712 --len; \
713 SvCUR_set(sv, len); \
714 p[len] = '\0'; \
715 } \
ad3296c6
SH
716} STMT_END
717
8b850bd5
NC
718void
719Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
720{
7918f24d
NC
721 PERL_ARGS_ASSERT_EMULATE_COP_IO;
722
8b850bd5
NC
723 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
724 sv_setsv(sv, &PL_sv_undef);
725 else {
726 sv_setpvs(sv, "");
727 SvUTF8_off(sv);
728 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
20439bc7 729 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
8b850bd5
NC
730 assert(value);
731 sv_catsv(sv, value);
732 }
733 sv_catpvs(sv, "\0");
734 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
20439bc7 735 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
8b850bd5
NC
736 assert(value);
737 sv_catsv(sv, value);
738 }
739 }
740}
741
25bbd826
CB
742#ifdef VMS
743#include <descrip.h>
744#include <starlet.h>
745#endif
746
79072805 747int
864dbfa3 748Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 749{
27da23d5 750 dVAR;
eb578fdb
KW
751 I32 paren;
752 const char *s = NULL;
753 REGEXP *rx;
823a54a3
AL
754 const char * const remaining = mg->mg_ptr + 1;
755 const char nextchar = *remaining;
79072805 756
7918f24d
NC
757 PERL_ARGS_ASSERT_MAGIC_GET;
758
79072805 759 switch (*mg->mg_ptr) {
748a9306 760 case '\001': /* ^A */
f2da823f
FC
761 if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget);
762 else sv_setsv(sv, &PL_sv_undef);
125b9982
NT
763 if (SvTAINTED(PL_bodytarget))
764 SvTAINTED_on(sv);
748a9306 765 break;
e5218da5 766 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 767 if (nextchar == '\0') {
e5218da5
GA
768 sv_setiv(sv, (IV)PL_minus_c);
769 }
823a54a3 770 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
771 sv_setiv(sv, (IV)STATUS_NATIVE);
772 }
49460fe6
NIS
773 break;
774
79072805 775 case '\004': /* ^D */
aea4f609 776 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 777 break;
28f23441 778 case '\005': /* ^E */
823a54a3 779 if (nextchar == '\0') {
e37778c2 780#if defined(VMS)
0a378802 781 {
0a378802
JH
782 char msg[255];
783 $DESCRIPTOR(msgdsc,msg);
784 sv_setnv(sv,(NV) vaxc$errno);
785 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
786 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
787 else
76f68e9b 788 sv_setpvs(sv,"");
0a378802 789 }
4b645107 790#elif defined(OS2)
0a378802
JH
791 if (!(_emx_env & 0x200)) { /* Under DOS */
792 sv_setnv(sv, (NV)errno);
793 sv_setpv(sv, errno ? Strerror(errno) : "");
794 } else {
795 if (errno != errno_isOS2) {
823a54a3 796 const int tmp = _syserrno();
0a378802
JH
797 if (tmp) /* 2nd call to _syserrno() makes it 0 */
798 Perl_rc = tmp;
799 }
800 sv_setnv(sv, (NV)Perl_rc);
801 sv_setpv(sv, os2error(Perl_rc));
802 }
4b645107 803#elif defined(WIN32)
0a378802 804 {
d4c19fe8 805 const DWORD dwErr = GetLastError();
0a378802 806 sv_setnv(sv, (NV)dwErr);
823a54a3 807 if (dwErr) {
0a378802
JH
808 PerlProc_GetOSError(sv, dwErr);
809 }
810 else
76f68e9b 811 sv_setpvs(sv, "");
0a378802
JH
812 SetLastError(dwErr);
813 }
22fae026 814#else
f6c8f21d 815 {
4ee39169 816 dSAVE_ERRNO;
f6c8f21d 817 sv_setnv(sv, (NV)errno);
666ea192 818 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 819 RESTORE_ERRNO;
f6c8f21d 820 }
28f23441 821#endif
ad3296c6 822 SvRTRIM(sv);
0a378802
JH
823 SvNOK_on(sv); /* what a wonderful hack! */
824 }
823a54a3 825 else if (strEQ(remaining, "NCODING"))
0a378802
JH
826 sv_setsv(sv, PL_encoding);
827 break;
79072805 828 case '\006': /* ^F */
3280af22 829 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 830 break;
9ebf26ad
FR
831 case '\007': /* ^GLOBAL_PHASE */
832 if (strEQ(remaining, "LOBAL_PHASE")) {
833 sv_setpvn(sv, PL_phase_names[PL_phase],
834 strlen(PL_phase_names[PL_phase]));
835 }
836 break;
a0d0e21e 837 case '\010': /* ^H */
3280af22 838 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 839 break;
9d116dd7 840 case '\011': /* ^I */ /* NOT \t in EBCDIC */
120f7abe 841 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
79072805 842 break;
8561ea1d
FC
843 case '\014': /* ^LAST_FH */
844 if (strEQ(remaining, "AST_FH")) {
845 if (PL_last_in_gv) {
846 assert(isGV_with_GP(PL_last_in_gv));
847 SV_CHECK_THINKFIRST_COW_DROP(sv);
848 prepare_SV_for_RV(sv);
849 SvOK_off(sv);
850 SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv));
851 SvROK_on(sv);
852 sv_rvweaken(sv);
853 }
854 else sv_setsv_nomg(sv, NULL);
855 }
856 break;
ac27b0f5 857 case '\017': /* ^O & ^OPEN */
823a54a3 858 if (nextchar == '\0') {
ac27b0f5 859 sv_setpv(sv, PL_osname);
3511154c
DM
860 SvTAINTED_off(sv);
861 }
823a54a3 862 else if (strEQ(remaining, "PEN")) {
8b850bd5 863 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 864 }
28f23441 865 break;
9ebf26ad 866 case '\020':
cde0cee5
YO
867 if (nextchar == '\0') { /* ^P */
868 sv_setiv(sv, (IV)PL_perldb);
869 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2c7b5d76
DM
870
871 paren = RX_BUFF_IDX_CARET_PREMATCH;
872 goto do_numbuf_fetch;
cde0cee5 873 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2c7b5d76
DM
874 paren = RX_BUFF_IDX_CARET_POSTMATCH;
875 goto do_numbuf_fetch;
cde0cee5 876 }
79072805 877 break;
fb73857a 878 case '\023': /* ^S */
823a54a3 879 if (nextchar == '\0') {
bc177e6b 880 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 881 SvOK_off(sv);
3280af22 882 else if (PL_in_eval)
6dc8a9e4 883 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
884 else
885 sv_setiv(sv, 0);
d58bf5aa 886 }
fb73857a 887 break;
79072805 888 case '\024': /* ^T */
823a54a3 889 if (nextchar == '\0') {
88e89b8a 890#ifdef BIG_TIME
7c36658b 891 sv_setnv(sv, PL_basetime);
88e89b8a 892#else
7c36658b 893 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 894#endif
7c36658b 895 }
823a54a3 896 else if (strEQ(remaining, "AINT"))
284167a5
SM
897 sv_setiv(sv, TAINTING_get
898 ? (TAINT_WARN_get || PL_unsafe ? -1 : 1)
9aa05f58 899 : 0);
7c36658b 900 break;
e07ea26a 901 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 902 if (strEQ(remaining, "NICODE"))
a05d7ebb 903 sv_setuv(sv, (UV) PL_unicode);
823a54a3 904 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 905 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
906 else if (strEQ(remaining, "TF8CACHE"))
907 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
908 break;
909 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 910 if (nextchar == '\0')
4438c4b7 911 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 912 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 913 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 914 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
915 }
916 else if (PL_compiling.cop_warnings == pWARN_STD) {
7e4f0450
FC
917 sv_setsv(sv, &PL_sv_undef);
918 break;
013b78e8 919 }
d3a7d8c7 920 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
921 /* Get the bit mask for $warnings::Bits{all}, because
922 * it could have been extended by warnings::register */
4bac9ae4
CS
923 HV * const bits = get_hv("warnings::Bits", 0);
924 SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL;
925 if (bits_all)
926 sv_copypv(sv, *bits_all);
927 else
928 sv_setpvn(sv, WARN_ALLstring, WARNsize);
ac27b0f5 929 }
4438c4b7 930 else {
72dc9ed5
NC
931 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
932 *PL_compiling.cop_warnings);
ac27b0f5 933 }
4438c4b7 934 }
79072805 935 break;
cde0cee5
YO
936 case '\015': /* $^MATCH */
937 if (strEQ(remaining, "ATCH")) {
2c7b5d76
DM
938 paren = RX_BUFF_IDX_CARET_FULLMATCH;
939 goto do_numbuf_fetch;
940 }
941
79072805
LW
942 case '1': case '2': case '3': case '4':
943 case '5': case '6': case '7': case '8': case '9': case '&':
2c7b5d76
DM
944 /*
945 * Pre-threads, this was paren = atoi(GvENAME((const GV *)mg->mg_obj));
946 * XXX Does the new way break anything?
947 */
948 paren = atoi(mg->mg_ptr); /* $& is in [0] */
949 do_numbuf_fetch:
950 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
951 CALLREG_NUMBUF_FETCH(rx,paren,sv);
952 break;
953 }
954 sv_setsv(sv,&PL_sv_undef);
79072805
LW
955 break;
956 case '+':
aaa362c4 957 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2c7b5d76
DM
958 paren = RX_LASTPAREN(rx);
959 if (paren)
960 goto do_numbuf_fetch;
79072805 961 }
3280af22 962 sv_setsv(sv,&PL_sv_undef);
79072805 963 break;
a01268b5
JH
964 case '\016': /* ^N */
965 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2c7b5d76
DM
966 paren = RX_LASTCLOSEPAREN(rx);
967 if (paren)
968 goto do_numbuf_fetch;
a01268b5
JH
969 }
970 sv_setsv(sv,&PL_sv_undef);
971 break;
79072805 972 case '`':
2c7b5d76
DM
973 paren = RX_BUFF_IDX_PREMATCH;
974 goto do_numbuf_fetch;
79072805 975 case '\'':
2c7b5d76
DM
976 paren = RX_BUFF_IDX_POSTMATCH;
977 goto do_numbuf_fetch;
79072805 978 case '.':
3280af22 979 if (GvIO(PL_last_in_gv)) {
357c8808 980 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 981 }
79072805
LW
982 break;
983 case '?':
809a5acc 984 {
809a5acc 985 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 986#ifdef COMPLEX_STATUS
41cb7b2b 987 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
988 LvTARGOFF(sv) = PL_statusvalue;
989 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 990#endif
809a5acc 991 }
79072805
LW
992 break;
993 case '^':
acbe1b9d 994 if (GvIOp(PL_defoutgv))
099be4f1 995 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
996 if (s)
997 sv_setpv(sv,s);
998 else {
3280af22 999 sv_setpv(sv,GvENAME(PL_defoutgv));
cb421d5e 1000 sv_catpvs(sv,"_TOP");
79072805
LW
1001 }
1002 break;
1003 case '~':
acbe1b9d 1004 if (GvIOp(PL_defoutgv))
0daa599b 1005 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 1006 if (!s)
3280af22 1007 s = GvENAME(PL_defoutgv);
79072805
LW
1008 sv_setpv(sv,s);
1009 break;
79072805 1010 case '=':
099be4f1 1011 if (GvIO(PL_defoutgv))
0daa599b 1012 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
1013 break;
1014 case '-':
099be4f1 1015 if (GvIO(PL_defoutgv))
0daa599b 1016 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
1017 break;
1018 case '%':
099be4f1 1019 if (GvIO(PL_defoutgv))
0daa599b 1020 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 1021 break;
79072805
LW
1022 case ':':
1023 break;
1024 case '/':
1025 break;
1026 case '[':
e1dccc0d 1027 sv_setiv(sv, 0);
79072805
LW
1028 break;
1029 case '|':
099be4f1 1030 if (GvIO(PL_defoutgv))
0daa599b 1031 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805 1032 break;
79072805 1033 case '\\':
b2ce0fda 1034 if (PL_ors_sv)
f28098ff 1035 sv_copypv(sv, PL_ors_sv);
4bac9ae4
CS
1036 else
1037 sv_setsv(sv, &PL_sv_undef);
79072805 1038 break;
0e219455 1039 case '$': /* $$ */
9cdac2a2
FC
1040 {
1041 IV const pid = (IV)PerlProc_getpid();
19db9fb7 1042 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
9cdac2a2
FC
1043 /* never set manually, or at least not since last fork */
1044 sv_setiv(sv, pid);
19db9fb7
Z
1045 /* never unsafe, even if reading in a tainted expression */
1046 SvTAINTED_off(sv);
1047 }
9cdac2a2
FC
1048 /* else a value has been assigned manually, so do nothing */
1049 }
0e219455
MM
1050 break;
1051
79072805 1052 case '!':
666d8aa2
CB
1053 {
1054 dSAVE_ERRNO;
a5f75d66 1055#ifdef VMS
65202027 1056 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
a5f75d66 1057#else
65202027 1058 sv_setnv(sv, (NV)errno);
666d8aa2 1059#endif
88e89b8a 1060#ifdef OS2
ed344e4f
IZ
1061 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1062 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 1063 else
a5f75d66 1064#endif
1500bd91
KW
1065 if (! errno) {
1066 sv_setpvs(sv, "");
1067 }
1068 else {
1069
1070 /* Strerror can return NULL on some platforms, which will result in
1071 * 'sv' not being considered SvOK. The SvNOK_on() below will cause
1072 * just the number part to be valid */
1073 sv_setpv(sv, Strerror(errno));
1074
1075 /* In some locales the error string may come back as UTF-8, in
1076 * which case we should turn on that flag. This didn't use to
1077 * happen, and to avoid any possible backward compatibility issues,
1078 * we don't turn on the flag unless we have to. So the flag stays
1079 * off for an entirely ASCII string. We assume that if the string
1080 * looks like UTF-8, it really is UTF-8: "text in any other
1081 * encoding that uses bytes with the high bit set is extremely
1082 * unlikely to pass a UTF-8 validity test"
1083 * (http://en.wikipedia.org/wiki/Charset_detection). There is a
1084 * potential that we will get it wrong however, especially on short
1085 * error message text. (If it turns out to be necessary, we could
1086 * also keep track if the current LC_MESSAGES locale is UTF-8) */
1087 if (SvOK(sv) /* It could be that Strerror returned invalid */
1088 && ! is_ascii_string((U8*) SvPVX_const(sv), SvCUR(sv))
1089 && is_utf8_string((U8*) SvPVX_const(sv), SvCUR(sv)))
1090 {
1091 SvUTF8_on(sv);
1092 }
1093 }
4ee39169 1094 RESTORE_ERRNO;
88e89b8a 1095 }
666d8aa2 1096
ad3296c6 1097 SvRTRIM(sv);
946ec16e 1098 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1099 break;
1100 case '<':
dfff4baf 1101 sv_setuid(sv, PerlProc_getuid());
79072805
LW
1102 break;
1103 case '>':
dfff4baf 1104 sv_setuid(sv, PerlProc_geteuid());
79072805
LW
1105 break;
1106 case '(':
dfff4baf 1107 sv_setgid(sv, PerlProc_getgid());
79072805
LW
1108 goto add_groups;
1109 case ')':
dfff4baf 1110 sv_setgid(sv, PerlProc_getegid());
79072805 1111 add_groups:
79072805 1112#ifdef HAS_GETGROUPS
79072805 1113 {
57d7c65e 1114 Groups_t *gary = NULL;
fb45abb2 1115 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1116 Newx(gary, num_groups, Groups_t);
1117 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1118 for (i = 0; i < num_groups; i++)
1119 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1120 Safefree(gary);
79072805 1121 }
155aba94 1122 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1123#endif
79072805 1124 break;
79072805
LW
1125 case '0':
1126 break;
1127 }
a0d0e21e 1128 return 0;
79072805
LW
1129}
1130
1131int
864dbfa3 1132Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1133{
8772537c 1134 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 1135
7918f24d
NC
1136 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1137
79072805 1138 if (uf && uf->uf_val)
24f81a43 1139 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1140 return 0;
1141}
1142
1143int
864dbfa3 1144Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1145{
27da23d5 1146 dVAR;
9ae3433d 1147 STRLEN len = 0, klen;
12033064 1148 const char * const key = MgPV_const(mg,klen);
888a67f6 1149 const char *s = "";
1e422769 1150
7918f24d
NC
1151 PERL_ARGS_ASSERT_MAGIC_SETENV;
1152
613c63b4 1153 SvGETMAGIC(sv);
12033064 1154 if (SvOK(sv)) {
613c63b4
CS
1155 /* defined environment variables are byte strings; unfortunately
1156 there is no SvPVbyte_force_nomg(), so we must do this piecewise */
1157 (void)SvPV_force_nomg_nolen(sv);
1158 sv_utf8_downgrade(sv, /* fail_ok */ TRUE);
1159 if (SvUTF8(sv)) {
1160 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv");
1161 SvUTF8_off(sv);
1162 }
1163 s = SvPVX(sv);
1164 len = SvCUR(sv);
12033064
CS
1165 }
1166 my_setenv(key, s); /* does the deed */
1167
a0d0e21e
LW
1168#ifdef DYNAMIC_ENV_FETCH
1169 /* We just undefd an environment var. Is a replacement */
1170 /* waiting in the wings? */
1171 if (!len) {
6bd66ee9 1172 SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE);
fabdb6c0 1173 if (valp)
4ab59fcc 1174 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1175 }
1176#endif
1e422769 1177
39e571d4 1178#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1179 /* And you'll never guess what the dog had */
1180 /* in its mouth... */
284167a5 1181 if (TAINTING_get) {
1e422769
PP
1182 MgTAINTEDDIR_off(mg);
1183#ifdef VMS
6bd66ee9 1184 if (s && klen == 8 && strEQ(key, "DCL$PATH")) {
b8ffc8df 1185 char pathbuf[256], eltbuf[256], *cp, *elt;
1e422769
PP
1186 int i = 0, j = 0;
1187
6fca0082 1188 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1189 elt = eltbuf;
1e422769
PP
1190 do { /* DCL$PATH may be a search list */
1191 while (1) { /* as may dev portion of any element */
1192 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1193 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1194 cando_by_name(S_IWUSR,0,elt) ) {
1195 MgTAINTEDDIR_on(mg);
1196 return 0;
1197 }
1198 }
bd61b366 1199 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1200 *cp = '\0';
1201 if (my_trnlnm(elt, eltbuf, j++))
1202 elt = eltbuf;
1203 else
1204 break;
1205 }
1206 j = 0;
1207 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1208 }
1209#endif /* VMS */
12033064 1210 if (s && klen == 4 && strEQ(key,"PATH")) {
8772537c 1211 const char * const strend = s + len;
463ee0b2
LW
1212
1213 while (s < strend) {
96827780 1214 char tmpbuf[256];
c623ac67 1215 Stat_t st;
5f74f29c 1216 I32 i;
f5a63d97
AL
1217#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1218 const char path_sep = '|';
1219#else
1220 const char path_sep = ':';
1221#endif
96827780 1222 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1223 s, strend, path_sep, &i);
463ee0b2 1224 s++;
bb7a0f54 1225 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1226#ifdef VMS
1227 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1228#else
1229 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1230#endif
c6ed36e1 1231 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1232 MgTAINTEDDIR_on(mg);
1e422769
PP
1233 return 0;
1234 }
463ee0b2 1235 }
79072805
LW
1236 }
1237 }
39e571d4 1238#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1239
79072805
LW
1240 return 0;
1241}
1242
1243int
864dbfa3 1244Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1245{
7918f24d 1246 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
8772537c 1247 PERL_UNUSED_ARG(sv);
bd61b366 1248 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1249 return 0;
1250}
1251
88e89b8a 1252int
864dbfa3 1253Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1254{
97aff369 1255 dVAR;
7918f24d 1256 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
65e66c80 1257 PERL_UNUSED_ARG(mg);
b0269e46 1258#if defined(VMS)
cea2e8a9 1259 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1260#else
3280af22 1261 if (PL_localizing) {
fb73857a 1262 HE* entry;
b0269e46 1263 my_clearenv();
85fbaab2
NC
1264 hv_iterinit(MUTABLE_HV(sv));
1265 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
fb73857a
PP
1266 I32 keylen;
1267 my_setenv(hv_iterkey(entry, &keylen),
85fbaab2 1268 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
fb73857a
PP
1269 }
1270 }
1271#endif
1272 return 0;
1273}
1274
1275int
864dbfa3 1276Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1277{
27da23d5 1278 dVAR;
7918f24d 1279 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
8772537c
AL
1280 PERL_UNUSED_ARG(sv);
1281 PERL_UNUSED_ARG(mg);
b0269e46
AB
1282#if defined(VMS)
1283 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1284#else
1285 my_clearenv();
1286#endif
3e3baf6d 1287 return 0;
66b1d557
HM
1288}
1289
64ca3a65 1290#ifndef PERL_MICRO
2d4fcd5e
AJ
1291#ifdef HAS_SIGPROCMASK
1292static void
1293restore_sigmask(pTHX_ SV *save_sv)
1294{
0bd48802 1295 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1296 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1297}
1298#endif
66b1d557 1299int
864dbfa3 1300Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1301{
97aff369 1302 dVAR;
88e89b8a 1303 /* Are we fetching a signal entry? */
708854f2 1304 int i = (I16)mg->mg_private;
7918f24d
NC
1305
1306 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1307
708854f2 1308 if (!i) {
84c7b88c
BF
1309 STRLEN siglen;
1310 const char * sig = MgPV_const(mg, siglen);
1311 mg->mg_private = i = whichsig_pvn(sig, siglen);
708854f2
NC
1312 }
1313
e02bfb16 1314 if (i > 0) {
22c35a8c
GS
1315 if(PL_psig_ptr[i])
1316 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1317 else {
46da273f 1318 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1319#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1320 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1321 sigstate = SIG_IGN;
2e34cc90
CL
1322#endif
1323#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1324 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1325 sigstate = SIG_DFL;
85b332e2 1326#endif
88e89b8a 1327 /* cache state so we don't fetch it again */
8aad04aa 1328 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1329 sv_setpvs(sv,"IGNORE");
88e89b8a 1330 else
3280af22 1331 sv_setsv(sv,&PL_sv_undef);
46da273f 1332 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1333 SvTEMP_off(sv);
1334 }
1335 }
1336 return 0;
1337}
1338int
864dbfa3 1339Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1340{
7918f24d 1341 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
179c85a2 1342
38a124f0 1343 magic_setsig(NULL, mg);
179c85a2 1344 return sv_unmagic(sv, mg->mg_type);
88e89b8a 1345}
3d37d572 1346
0a8e0eff 1347Signal_t
8aad04aa 1348#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1349Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 1350#else
0a8e0eff 1351Perl_csighandler(int sig)
8aad04aa 1352#endif
0a8e0eff 1353{
1018e26f
NIS
1354#ifdef PERL_GET_SIG_CONTEXT
1355 dTHXa(PERL_GET_SIG_CONTEXT);
1356#else
85b332e2
CL
1357 dTHX;
1358#endif
23ada85b 1359#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1360 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1361 if (PL_sig_ignoring[sig]) return;
85b332e2 1362#endif
2e34cc90 1363#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1364 if (PL_sig_defaulting[sig])
2e34cc90
CL
1365#ifdef KILL_BY_SIGPRC
1366 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1367#else
1368 exit(1);
1369#endif
1370#endif
406878dd 1371 if (
853d2c32
RGS
1372#ifdef SIGILL
1373 sig == SIGILL ||
1374#endif
1375#ifdef SIGBUS
1376 sig == SIGBUS ||
1377#endif
1378#ifdef SIGSEGV
1379 sig == SIGSEGV ||
1380#endif
1381 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3 1382 /* Call the perl level handler now--
31c91b43 1383 * with risk we may be in malloc() or being destructed etc. */
6e324d09 1384#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1385 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1386#else
1387 (*PL_sighandlerp)(sig);
92807b6d 1388#endif
406878dd 1389 else {
31c91b43 1390 if (!PL_psig_pend) return;
406878dd
GA
1391 /* Set a flag to say this signal is pending, that is awaiting delivery after
1392 * the current Perl opcode completes */
1393 PL_psig_pend[sig]++;
1394
1395#ifndef SIG_PENDING_DIE_COUNT
1396# define SIG_PENDING_DIE_COUNT 120
1397#endif
fe13d51d 1398 /* Add one to say _a_ signal is pending */
406878dd
GA
1399 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1400 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1401 (unsigned long)SIG_PENDING_DIE_COUNT);
1402 }
0a8e0eff
NIS
1403}
1404
2e34cc90
CL
1405#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1406void
1407Perl_csighandler_init(void)
1408{
1409 int sig;
27da23d5 1410 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1411
1412 for (sig = 1; sig < SIG_SIZE; sig++) {
1413#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1414 dTHX;
27da23d5 1415 PL_sig_defaulting[sig] = 1;
5c1546dc 1416 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1417#endif
1418#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1419 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1420#endif
1421 }
27da23d5 1422 PL_sig_handlers_initted = 1;
2e34cc90
CL
1423}
1424#endif
1425
7fe50b8b
LT
1426#if defined HAS_SIGPROCMASK
1427static void
1428unblock_sigmask(pTHX_ void* newset)
1429{
1430 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1431}
1432#endif
1433
0a8e0eff
NIS
1434void
1435Perl_despatch_signals(pTHX)
1436{
97aff369 1437 dVAR;
0a8e0eff
NIS
1438 int sig;
1439 PL_sig_pending = 0;
1440 for (sig = 1; sig < SIG_SIZE; sig++) {
1441 if (PL_psig_pend[sig]) {
d0166017 1442 dSAVE_ERRNO;
7fe50b8b 1443#ifdef HAS_SIGPROCMASK
55534442
LT
1444 /* From sigaction(2) (FreeBSD man page):
1445 * | Signal routines normally execute with the signal that
1446 * | caused their invocation blocked, but other signals may
1447 * | yet occur.
1448 * Emulation of this behavior (from within Perl) is enabled
1449 * using sigprocmask
1450 */
1451 int was_blocked;
1452 sigset_t newset, oldset;
1453
1454 sigemptyset(&newset);
1455 sigaddset(&newset, sig);
1456 sigprocmask(SIG_BLOCK, &newset, &oldset);
1457 was_blocked = sigismember(&oldset, sig);
7fe50b8b
LT
1458 if (!was_blocked) {
1459 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1460 ENTER;
1461 SAVEFREESV(save_sv);
1462 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1463 }
55534442 1464#endif
25da4428 1465 PL_psig_pend[sig] = 0;
6e324d09 1466#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1467 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1468#else
1469 (*PL_sighandlerp)(sig);
92807b6d 1470#endif
7fe50b8b 1471#ifdef HAS_SIGPROCMASK
55534442 1472 if (!was_blocked)
7fe50b8b 1473 LEAVE;
55534442 1474#endif
d0166017 1475 RESTORE_ERRNO;
0a8e0eff
NIS
1476 }
1477 }
1478}
1479
38a124f0 1480/* sv of NULL signifies that we're acting as magic_clearsig. */
85e6fe83 1481int
864dbfa3 1482Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1483{
27da23d5 1484 dVAR;
79072805 1485 I32 i;
cbbf8932 1486 SV** svp = NULL;
2d4fcd5e
AJ
1487 /* Need to be careful with SvREFCNT_dec(), because that can have side
1488 * effects (due to closures). We must make sure that the new disposition
1489 * is in place before it is called.
1490 */
cbbf8932 1491 SV* to_dec = NULL;
e72dc28c 1492 STRLEN len;
2d4fcd5e
AJ
1493#ifdef HAS_SIGPROCMASK
1494 sigset_t set, save;
1495 SV* save_sv;
1496#endif
eb578fdb 1497 const char *s = MgPV_const(mg,len);
7918f24d
NC
1498
1499 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1500
748a9306 1501 if (*s == '_') {
84c7b88c 1502 if (memEQs(s, len, "__DIE__"))
3280af22 1503 svp = &PL_diehook;
84c7b88c 1504 else if (memEQs(s, len, "__WARN__")
38a124f0
NC
1505 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1506 /* Merge the existing behaviours, which are as follows:
1507 magic_setsig, we always set svp to &PL_warnhook
1508 (hence we always change the warnings handler)
1509 For magic_clearsig, we don't change the warnings handler if it's
1510 set to the &PL_warnhook. */
3280af22 1511 svp = &PL_warnhook;
84c7b88c
BF
1512 } else if (sv) {
1513 SV *tmp = sv_newmortal();
1514 Perl_croak(aTHX_ "No such hook: %s",
1515 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1516 }
748a9306 1517 i = 0;
38a124f0 1518 if (svp && *svp) {
9289f461
RGS
1519 if (*svp != PERL_WARNHOOK_FATAL)
1520 to_dec = *svp;
cbbf8932 1521 *svp = NULL;
4633a7c4 1522 }
748a9306
LW
1523 }
1524 else {
708854f2
NC
1525 i = (I16)mg->mg_private;
1526 if (!i) {
84c7b88c 1527 i = whichsig_pvn(s, len); /* ...no, a brick */
58a26b12 1528 mg->mg_private = (U16)i;
708854f2 1529 }
86d86cad 1530 if (i <= 0) {
84c7b88c
BF
1531 if (sv) {
1532 SV *tmp = sv_newmortal();
1533 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1534 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1535 }
748a9306
LW
1536 return 0;
1537 }
2d4fcd5e
AJ
1538#ifdef HAS_SIGPROCMASK
1539 /* Avoid having the signal arrive at a bad time, if possible. */
1540 sigemptyset(&set);
1541 sigaddset(&set,i);
1542 sigprocmask(SIG_BLOCK, &set, &save);
1543 ENTER;
9ff8e806 1544 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ
1545 SAVEFREESV(save_sv);
1546 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1547#endif
1548 PERL_ASYNC_CHECK();
2e34cc90 1549#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1550 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1551#endif
23ada85b 1552#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1553 PL_sig_ignoring[i] = 0;
85b332e2 1554#endif
2e34cc90 1555#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1556 PL_sig_defaulting[i] = 0;
2e34cc90 1557#endif
2d4fcd5e 1558 to_dec = PL_psig_ptr[i];
38a124f0
NC
1559 if (sv) {
1560 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1561 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
79fd3822
NC
1562
1563 /* Signals don't change name during the program's execution, so once
1564 they're cached in the appropriate slot of PL_psig_name, they can
1565 stay there.
1566
1567 Ideally we'd find some way of making SVs at (C) compile time, or
1568 at least, doing most of the work. */
1569 if (!PL_psig_name[i]) {
1570 PL_psig_name[i] = newSVpvn(s, len);
1571 SvREADONLY_on(PL_psig_name[i]);
1572 }
38a124f0 1573 } else {
79fd3822 1574 SvREFCNT_dec(PL_psig_name[i]);
38a124f0
NC
1575 PL_psig_name[i] = NULL;
1576 PL_psig_ptr[i] = NULL;
1577 }
748a9306 1578 }
38a124f0 1579 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
2d4fcd5e 1580 if (i) {
5c1546dc 1581 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1582 }
748a9306 1583 else
b37c2d43 1584 *svp = SvREFCNT_inc_simple_NN(sv);
38a124f0 1585 } else {
9dfa190b
NC
1586 if (sv && SvOK(sv)) {
1587 s = SvPV_force(sv, len);
1588 } else {
1589 sv = NULL;
1590 }
84c7b88c 1591 if (sv && memEQs(s, len,"IGNORE")) {
9dfa190b 1592 if (i) {
23ada85b 1593#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
9dfa190b
NC
1594 PL_sig_ignoring[i] = 1;
1595 (void)rsignal(i, PL_csighandlerp);
85b332e2 1596#else
9dfa190b 1597 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1598#endif
9dfa190b 1599 }
2d4fcd5e 1600 }
84c7b88c 1601 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
9dfa190b 1602 if (i) {
2e34cc90 1603#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
9dfa190b
NC
1604 PL_sig_defaulting[i] = 1;
1605 (void)rsignal(i, PL_csighandlerp);
2e34cc90 1606#else
9dfa190b 1607 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1608#endif
9dfa190b
NC
1609 }
1610 }
1611 else {
1612 /*
1613 * We should warn if HINT_STRICT_REFS, but without
1614 * access to a known hint bit in a known OP, we can't
1615 * tell whether HINT_STRICT_REFS is in force or not.
1616 */
1617 if (!strchr(s,':') && !strchr(s,'\''))
1618 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1619 SV_GMAGIC);
1620 if (i)
1621 (void)rsignal(i, PL_csighandlerp);
1622 else
1623 *svp = SvREFCNT_inc_simple_NN(sv);
136e0459 1624 }
748a9306 1625 }
9dfa190b 1626
2d4fcd5e
AJ
1627#ifdef HAS_SIGPROCMASK
1628 if(i)
1629 LEAVE;
1630#endif
ef8d46e8 1631 SvREFCNT_dec(to_dec);
79072805
LW
1632 return 0;
1633}
64ca3a65 1634#endif /* !PERL_MICRO */
79072805
LW
1635
1636int
864dbfa3 1637Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1638{
97aff369 1639 dVAR;
7918f24d 1640 PERL_ARGS_ASSERT_MAGIC_SETISA;
8772537c 1641 PERL_UNUSED_ARG(sv);
e1a479c5 1642
89c14e2e 1643 /* Skip _isaelem because _isa will handle it shortly */
354b0578 1644 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
89c14e2e
BB
1645 return 0;
1646
0e446081 1647 return magic_clearisa(NULL, mg);
463ee0b2
LW
1648}
1649
0e446081 1650/* sv of NULL signifies that we're acting as magic_setisa. */
463ee0b2 1651int
52b45067
RD
1652Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1653{
1654 dVAR;
1655 HV* stash;
1656
7918f24d
NC
1657 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1658
52b45067 1659 /* Bail out if destruction is going on */
627364f1 1660 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
52b45067 1661
0e446081
NC
1662 if (sv)
1663 av_clear(MUTABLE_AV(sv));
52b45067 1664
6624142a
FC
1665 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1666 /* This occurs with setisa_elem magic, which calls this
1667 same function. */
1668 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1669
1670 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1671 SV **svp = AvARRAY((AV *)mg->mg_obj);
1672 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1673 while (items--) {
1674 stash = GvSTASH((GV *)*svp++);
1675 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1676 }
1677
1678 return 0;
1679 }
1680
52b45067 1681 stash = GvSTASH(
6624142a 1682 (const GV *)mg->mg_obj
52b45067
RD
1683 );
1684
00169e2c
FC
1685 /* The stash may have been detached from the symbol table, so check its
1686 name before doing anything. */
1687 if (stash && HvENAME_get(stash))
5562fa71 1688 mro_isa_changed_in(stash);
52b45067
RD
1689
1690 return 0;
1691}
1692
1693int
864dbfa3 1694Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1695{
85fbaab2 1696 HV * const hv = MUTABLE_HV(LvTARG(sv));
6ff81951 1697 I32 i = 0;
7918f24d
NC
1698
1699 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
8772537c 1700 PERL_UNUSED_ARG(mg);
7719e241 1701
6ff81951 1702 if (hv) {
497b47a8 1703 (void) hv_iterinit(hv);
ad64d0ec 1704 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1b95d04f 1705 i = HvUSEDKEYS(hv);
497b47a8
JH
1706 else {
1707 while (hv_iternext(hv))
1708 i++;
1709 }
6ff81951
GS
1710 }
1711
1712 sv_setiv(sv, (IV)i);
1713 return 0;
1714}
1715
1716int
864dbfa3 1717Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1718{
7918f24d 1719 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
8772537c 1720 PERL_UNUSED_ARG(mg);
946ec16e 1721 if (LvTARG(sv)) {
85fbaab2 1722 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
946ec16e
PP
1723 }
1724 return 0;
ac27b0f5 1725}
946ec16e 1726
efaf3674
DM
1727/*
1728=for apidoc magic_methcall
1729
1730Invoke a magic method (like FETCH).
1731
2baee27b
FC
1732C<sv> and C<mg> are the tied thingy and the tie magic.
1733
1734C<meth> is the name of the method to call.
1735
1736C<argc> is the number of args (in addition to $self) to pass to the method.
1737
1738The C<flags> can be:
1739
1740 G_DISCARD invoke method with G_DISCARD flag and don't
1741 return a value
1742 G_UNDEF_FILL fill the stack with argc pointers to
1743 PL_sv_undef
1744
1745The arguments themselves are any values following the C<flags> argument.
efaf3674
DM
1746
1747Returns the SV (if any) returned by the method, or NULL on failure.
1748
1749
1750=cut
1751*/
1752
1753SV*
36925d9e 1754Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
046b0c7d 1755 U32 argc, ...)
a0d0e21e 1756{
97aff369 1757 dVAR;
a0d0e21e 1758 dSP;
efaf3674 1759 SV* ret = NULL;
463ee0b2 1760
7918f24d
NC
1761 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1762
efaf3674 1763 ENTER;
d1d7a15d
NC
1764
1765 if (flags & G_WRITING_TO_STDERR) {
1766 SAVETMPS;
1767
1768 save_re_context();
1769 SAVESPTR(PL_stderrgv);
1770 PL_stderrgv = NULL;
1771 }
1772
efaf3674 1773 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1774 PUSHMARK(SP);
efaf3674 1775
67549bd2
NC
1776 EXTEND(SP, argc+1);
1777 PUSHs(SvTIED_obj(sv, mg));
1778 if (flags & G_UNDEF_FILL) {
1779 while (argc--) {
efaf3674 1780 PUSHs(&PL_sv_undef);
93965878 1781 }
67549bd2 1782 } else if (argc > 0) {
046b0c7d
NC
1783 va_list args;
1784 va_start(args, argc);
1785
1786 do {
1787 SV *const sv = va_arg(args, SV *);
1788 PUSHs(sv);
1789 } while (--argc);
1790
1791 va_end(args);
88e89b8a 1792 }
463ee0b2 1793 PUTBACK;
efaf3674 1794 if (flags & G_DISCARD) {
36925d9e 1795 call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED);
efaf3674
DM
1796 }
1797 else {
36925d9e 1798 if (call_sv(meth, G_SCALAR|G_METHOD_NAMED))
efaf3674
DM
1799 ret = *PL_stack_sp--;
1800 }
1801 POPSTACK;
d1d7a15d
NC
1802 if (flags & G_WRITING_TO_STDERR)
1803 FREETMPS;
efaf3674
DM
1804 LEAVE;
1805 return ret;
1806}
1807
efaf3674 1808/* wrapper for magic_methcall that creates the first arg */
463ee0b2 1809
efaf3674 1810STATIC SV*
36925d9e 1811S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
efaf3674
DM
1812 int n, SV *val)
1813{
1814 dVAR;
1815 SV* arg1 = NULL;
1816
1817 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1818
1819 if (mg->mg_ptr) {
1820 if (mg->mg_len >= 0) {
db4b3a1d 1821 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
efaf3674
DM
1822 }
1823 else if (mg->mg_len == HEf_SVKEY)
1824 arg1 = MUTABLE_SV(mg->mg_ptr);
1825 }
1826 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
db4b3a1d 1827 arg1 = newSViv((IV)(mg->mg_len));
efaf3674
DM
1828 sv_2mortal(arg1);
1829 }
1830 if (!arg1) {
046b0c7d 1831 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
efaf3674 1832 }
046b0c7d 1833 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
946ec16e
PP
1834}
1835
76e3520e 1836STATIC int
36925d9e 1837S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth)
a0d0e21e 1838{
efaf3674
DM
1839 dVAR;
1840 SV* ret;
463ee0b2 1841
7918f24d
NC
1842 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1843
efaf3674
DM
1844 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1845 if (ret)
1846 sv_setsv(sv, ret);
a0d0e21e
LW
1847 return 0;
1848}
463ee0b2 1849
a0d0e21e 1850int
864dbfa3 1851Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1852{
7918f24d
NC
1853 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1854
fd69380d 1855 if (mg->mg_type == PERL_MAGIC_tiedelem)
a0d0e21e 1856 mg->mg_flags |= MGf_GSKIP;
36925d9e 1857 magic_methpack(sv,mg,SV_CONST(FETCH));
463ee0b2
LW
1858 return 0;
1859}
1860
1861int
864dbfa3 1862Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1863{
efaf3674 1864 dVAR;
b112cff9
DM
1865 MAGIC *tmg;
1866 SV *val;
7918f24d
NC
1867
1868 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1869
b112cff9
DM
1870 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1871 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1872 * public flags indicate its value based on copying from $val. Doing
1873 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1874 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1875 * wrong if $val happened to be tainted, as sv hasn't got magic
1876 * enabled, even though taint magic is in the chain. In which case,
1877 * fake up a temporary tainted value (this is easier than temporarily
1878 * re-enabling magic on sv). */
1879
284167a5 1880 if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint))
b112cff9
DM
1881 && (tmg->mg_len & 1))
1882 {
1883 val = sv_mortalcopy(sv);
1884 SvTAINTED_on(val);
1885 }
1886 else
1887 val = sv;
1888
36925d9e 1889 magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val);
463ee0b2
LW
1890 return 0;
1891}
1892
1893int
864dbfa3 1894Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1895{
7918f24d
NC
1896 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1897
4c13be3f 1898 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
36925d9e 1899 return magic_methpack(sv,mg,SV_CONST(DELETE));
a0d0e21e 1900}
463ee0b2 1901
93965878
NIS
1902
1903U32
864dbfa3 1904Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1905{
efaf3674 1906 dVAR;
22846ab4 1907 I32 retval = 0;
efaf3674 1908 SV* retsv;
93965878 1909
7918f24d
NC
1910 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1911
36925d9e 1912 retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL);
efaf3674
DM
1913 if (retsv) {
1914 retval = SvIV(retsv)-1;
22846ab4
AB
1915 if (retval < -1)
1916 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1917 }
22846ab4 1918 return (U32) retval;
93965878
NIS
1919}
1920
cea2e8a9
GS
1921int
1922Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1923{
efaf3674 1924 dVAR;
463ee0b2 1925
7918f24d
NC
1926 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1927
36925d9e 1928 Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0);
463ee0b2
LW
1929 return 0;
1930}
1931
1932int
864dbfa3 1933Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1934{
efaf3674
DM
1935 dVAR;
1936 SV* ret;
463ee0b2 1937
7918f24d
NC
1938 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1939
36925d9e
RZ
1940 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key)
1941 : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0);
efaf3674
DM
1942 if (ret)
1943 sv_setsv(key,ret);
79072805
LW
1944 return 0;
1945}
1946
1947int
1146e912 1948Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e 1949{
7918f24d
NC
1950 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1951
36925d9e 1952 return magic_methpack(sv,mg,SV_CONST(EXISTS));
ac27b0f5 1953}
a0d0e21e 1954
a3bcc51e
TP
1955SV *
1956Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1957{
efaf3674 1958 dVAR;
5fcbf73d 1959 SV *retval;
ad64d0ec
NC
1960 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1961 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
a3bcc51e 1962
7918f24d
NC
1963 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1964
a3bcc51e
TP
1965 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1966 SV *key;
bfcb3514 1967 if (HvEITER_get(hv))
a3bcc51e
TP
1968 /* we are in an iteration so the hash cannot be empty */
1969 return &PL_sv_yes;
1970 /* no xhv_eiter so now use FIRSTKEY */
1971 key = sv_newmortal();
ad64d0ec 1972 magic_nextpack(MUTABLE_SV(hv), mg, key);
bfcb3514 1973 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1974 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1975 }
1976
1977 /* there is a SCALAR method that we can call */
36925d9e 1978 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0);
efaf3674 1979 if (!retval)
5fcbf73d 1980 retval = &PL_sv_undef;
a3bcc51e
TP
1981 return retval;
1982}
1983
a0d0e21e 1984int
864dbfa3 1985Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1986{
97aff369 1987 dVAR;
089b5c60 1988 SV **svp;
7918f24d
NC
1989
1990 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
1991
089b5c60
NC
1992 /* The magic ptr/len for the debugger's hash should always be an SV. */
1993 if (UNLIKELY(mg->mg_len != HEf_SVKEY)) {
1994 Perl_croak(aTHX_ "panic: magic_setdbline len=%"IVdf", ptr='%s'",
1995 mg->mg_len, mg->mg_ptr);
1996 }
1997
1998 /* Use sv_2iv instead of SvIV() as the former generates smaller code, and
1999 setting/clearing debugger breakpoints is not a hot path. */
2000 svp = av_fetch(GvAV(PL_DBline), sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE);
2001
8772537c
AL
2002 if (svp && SvIOKp(*svp)) {
2003 OP * const o = INT2PTR(OP*,SvIVX(*svp));
2004 if (o) {
7bbbc3c0
NC
2005#ifdef PERL_DEBUG_READONLY_OPS
2006 Slab_to_rw(OpSLAB(o));
2007#endif
8772537c 2008 /* set or clear breakpoint in the relevant control op */
089b5c60 2009 if (SvTRUE(sv))
8772537c
AL
2010 o->op_flags |= OPf_SPECIAL;
2011 else
2012 o->op_flags &= ~OPf_SPECIAL;
7bbbc3c0
NC
2013#ifdef PERL_DEBUG_READONLY_OPS
2014 Slab_to_ro(OpSLAB(o));
2015#endif
8772537c 2016 }
5df8de69 2017 }
79072805
LW
2018 return 0;
2019}
2020
2021int
8772537c 2022Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 2023{
97aff369 2024 dVAR;
502c6561 2025 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC
2026
2027 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2028
83bf042f 2029 if (obj) {
e1dccc0d 2030 sv_setiv(sv, AvFILL(obj));
83bf042f 2031 } else {
d4a823b3 2032 sv_setsv(sv, NULL);
83bf042f 2033 }
79072805
LW
2034 return 0;
2035}
2036
2037int
864dbfa3 2038Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 2039{
97aff369 2040 dVAR;
502c6561 2041 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC
2042
2043 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2044
83bf042f 2045 if (obj) {
e1dccc0d 2046 av_fill(obj, SvIV(sv));
83bf042f 2047 } else {
a2a5de95
NC
2048 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2049 "Attempt to set length of freed array");
83bf042f
NC
2050 }
2051 return 0;
2052}
2053
2054int
83f29afa
VP
2055Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2056{
2057 dVAR;
2058
2059 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2060 PERL_UNUSED_ARG(sv);
2061
2062 /* Reset the iterator when the array is cleared */
3565fbf3
VP
2063#if IVSIZE == I32SIZE
2064 *((IV *) &(mg->mg_len)) = 0;
2065#else
83f29afa
VP
2066 if (mg->mg_ptr)
2067 *((IV *) mg->mg_ptr) = 0;
3565fbf3 2068#endif
83f29afa
VP
2069
2070 return 0;
2071}
2072
2073int
83bf042f
NC
2074Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2075{
97aff369 2076 dVAR;
7918f24d
NC
2077
2078 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 2079 PERL_UNUSED_ARG(sv);
7918f24d 2080
94f3782b
DM
2081 /* during global destruction, mg_obj may already have been freed */
2082 if (PL_in_clean_all)
1ea47f64 2083 return 0;
94f3782b 2084
83bf042f
NC
2085 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2086
2087 if (mg) {
2088 /* arylen scalar holds a pointer back to the array, but doesn't own a
2089 reference. Hence the we (the array) are about to go away with it
2090 still pointing at us. Clear its pointer, else it would be pointing
2091 at free memory. See the comment in sv_magic about reference loops,
2092 and why it can't own a reference to us. */
2093 mg->mg_obj = 0;
2094 }
a0d0e21e
LW
2095 return 0;
2096}
2097
2098int
864dbfa3 2099Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2100{
97aff369 2101 dVAR;
16eb5365 2102 SV* const lsv = LvTARG(sv);
96c2a8ff 2103 MAGIC * const found = mg_find_mglob(lsv);
7918f24d
NC
2104
2105 PERL_ARGS_ASSERT_MAGIC_GETPOS;
16eb5365 2106 PERL_UNUSED_ARG(mg);
ac27b0f5 2107
6174b39a
FC
2108 if (found && found->mg_len != -1) {
2109 STRLEN i = found->mg_len;
25fdce4a 2110 if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv))
6174b39a
FC
2111 i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN);
2112 sv_setuv(sv, i);
a0d0e21e 2113 return 0;
a0d0e21e 2114 }
35995e5c 2115 sv_setsv(sv,NULL);
a0d0e21e
LW
2116 return 0;
2117}
2118
2119int
864dbfa3 2120Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2121{
97aff369 2122 dVAR;
16eb5365 2123 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
2124 SSize_t pos;
2125 STRLEN len;
c00206c8 2126 STRLEN ulen = 0;
53d44271 2127 MAGIC* found;
aec43834 2128 const char *s;
a0d0e21e 2129
7918f24d 2130 PERL_ARGS_ASSERT_MAGIC_SETPOS;
16eb5365 2131 PERL_UNUSED_ARG(mg);
ac27b0f5 2132
96c2a8ff 2133 found = mg_find_mglob(lsv);
3881461a 2134 if (!found) {
a0d0e21e
LW
2135 if (!SvOK(sv))
2136 return 0;
96c2a8ff 2137 found = sv_magicext_mglob(lsv);
a0d0e21e
LW
2138 }
2139 else if (!SvOK(sv)) {
3881461a 2140 found->mg_len = -1;
a0d0e21e
LW
2141 return 0;
2142 }
aec43834 2143 s = SvPV_const(lsv, len);
a0d0e21e 2144
e1dccc0d 2145 pos = SvIV(sv);
a0ed51b3 2146
7e2040f0 2147 if (DO_UTF8(lsv)) {
aec43834 2148 ulen = sv_or_pv_len_utf8(lsv, s, len);
a0ed51b3
LW
2149 if (ulen)
2150 len = ulen;
a0ed51b3
LW
2151 }
2152
a0d0e21e
LW
2153 if (pos < 0) {
2154 pos += len;
2155 if (pos < 0)
2156 pos = 0;
2157 }
eb160463 2158 else if (pos > (SSize_t)len)
a0d0e21e 2159 pos = len;
a0ed51b3 2160
3881461a 2161 found->mg_len = pos;
25fdce4a 2162 found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES);
a0d0e21e 2163
79072805
LW
2164 return 0;
2165}
2166
2167int
864dbfa3 2168Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
2169{
2170 STRLEN len;
35a4481c 2171 SV * const lsv = LvTARG(sv);
b83604b4 2172 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB
2173 STRLEN offs = LvTARGOFF(sv);
2174 STRLEN rem = LvTARGLEN(sv);
83f78d1a
FC
2175 const bool negoff = LvFLAGS(sv) & 1;
2176 const bool negrem = LvFLAGS(sv) & 2;
7918f24d
NC
2177
2178 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2179 PERL_UNUSED_ARG(mg);
6ff81951 2180
83f78d1a 2181 if (!translate_substr_offsets(
4ddea69a 2182 SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len,
83f78d1a
FC
2183 negoff ? -(IV)offs : (IV)offs, !negoff,
2184 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2185 )) {
2186 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2187 sv_setsv_nomg(sv, &PL_sv_undef);
2188 return 0;
2189 }
2190
9aa983d2 2191 if (SvUTF8(lsv))
4ddea69a 2192 offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem);
1c900557 2193 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2194 if (SvUTF8(lsv))
2ef4b674 2195 SvUTF8_on(sv);
6ff81951
GS
2196 return 0;
2197}
2198
2199int
864dbfa3 2200Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2201{
97aff369 2202 dVAR;
83f78d1a 2203 STRLEN len, lsv_len, oldtarglen, newtarglen;
5fcbf73d 2204 const char * const tmps = SvPV_const(sv, len);
dd374669 2205 SV * const lsv = LvTARG(sv);
777f7c56
EB
2206 STRLEN lvoff = LvTARGOFF(sv);
2207 STRLEN lvlen = LvTARGLEN(sv);
83f78d1a
FC
2208 const bool negoff = LvFLAGS(sv) & 1;
2209 const bool neglen = LvFLAGS(sv) & 2;
7918f24d
NC
2210
2211 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2212 PERL_UNUSED_ARG(mg);
075a4a2b 2213
a74fb2cd
FC
2214 SvGETMAGIC(lsv);
2215 if (SvROK(lsv))
2216 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2217 "Attempt to use reference as lvalue in substr"
2218 );
fc061ed8
FC
2219 SvPV_force_nomg(lsv,lsv_len);
2220 if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv);
83f78d1a
FC
2221 if (!translate_substr_offsets(
2222 lsv_len,
2223 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2224 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2225 ))
2226 Perl_croak(aTHX_ "substr outside of string");
2227 oldtarglen = lvlen;
1aa99e6b 2228 if (DO_UTF8(sv)) {
73a087f0 2229 sv_utf8_upgrade_nomg(lsv);
d931b1be 2230 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
a74fb2cd 2231 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
7a385470 2232 newtarglen = sv_or_pv_len_utf8(sv, tmps, len);
9aa983d2
JH
2233 SvUTF8_on(lsv);
2234 }
0d336106 2235 else if (SvUTF8(lsv)) {
5fcbf73d 2236 const char *utf8;
d931b1be 2237 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
83f78d1a 2238 newtarglen = len;
5fcbf73d 2239 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
a74fb2cd 2240 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
5fcbf73d 2241 Safefree(utf8);
1aa99e6b 2242 }
b76f3ce2 2243 else {
a74fb2cd 2244 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2245 newtarglen = len;
b76f3ce2 2246 }
83f78d1a
FC
2247 if (!neglen) LvTARGLEN(sv) = newtarglen;
2248 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
b76f3ce2 2249
79072805
LW
2250 return 0;
2251}
2252
2253int
864dbfa3 2254Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2255{
97aff369 2256 dVAR;
7918f24d
NC
2257
2258 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2259 PERL_UNUSED_ARG(sv);
9a9b5ec9
DM
2260#ifdef NO_TAINT_SUPPORT
2261 PERL_UNUSED_ARG(mg);
2262#endif
7918f24d 2263
27cc343c 2264 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2265 return 0;
2266}
2267
2268int
864dbfa3 2269Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2270{
97aff369 2271 dVAR;
7918f24d
NC
2272
2273 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2274 PERL_UNUSED_ARG(sv);
7918f24d 2275
b01e650a 2276 /* update taint status */
284167a5 2277 if (TAINT_get)
b01e650a
DM
2278 mg->mg_len |= 1;
2279 else
2280 mg->mg_len &= ~1;
463ee0b2
LW
2281 return 0;
2282}
2283
2284int
864dbfa3 2285Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2286{
35a4481c 2287 SV * const lsv = LvTARG(sv);
7918f24d
NC
2288
2289 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2290 PERL_UNUSED_ARG(mg);
6ff81951 2291
2e9e14dd 2292 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
6ff81951 2293
6ff81951
GS
2294 return 0;
2295}
2296
2297int
864dbfa3 2298Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2299{
7918f24d 2300 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2301 PERL_UNUSED_ARG(mg);
79072805
LW
2302 do_vecset(sv); /* XXX slurp this routine */
2303 return 0;
2304}
2305
13733cde
FC
2306SV *
2307Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2308{
97aff369 2309 dVAR;
a0714e2c 2310 SV *targ = NULL;
13733cde
FC
2311 PERL_ARGS_ASSERT_DEFELEM_TARGET;
2312 if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem);
2313 assert(mg);
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 2320 }
bbfdc870 2321 else if (LvSTARGOFF(sv) >= 0) {
502c6561 2322 AV *const av = MUTABLE_AV(LvTARG(sv));
bbfdc870
FC
2323 if (LvSTARGOFF(sv) <= AvFILL(av))
2324 targ = AvARRAY(av)[LvSTARGOFF(sv)];
68dc0745 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 }
13733cde 2335 return targ;
5f05dabc 2336 }
71be2cbc 2337 else
13733cde
FC
2338 return LvTARG(sv);
2339}
2340
2341int
2342Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2343{
2344 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2345
2346 sv_setsv(sv, defelem_target(sv, mg));
71be2cbc
PP
2347 return 0;
2348}
2349
2350int
864dbfa3 2351Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2352{
7918f24d 2353 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2354 PERL_UNUSED_ARG(mg);
71be2cbc 2355 if (LvTARGLEN(sv))
68dc0745
PP
2356 vivify_defelem(sv);
2357 if (LvTARG(sv)) {
5f05dabc 2358 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2359 SvSETMAGIC(LvTARG(sv));
2360 }
5f05dabc
PP
2361 return 0;
2362}
2363
71be2cbc 2364void
864dbfa3 2365Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2366{
97aff369 2367 dVAR;
74e13ce4 2368 MAGIC *mg;
a0714e2c 2369 SV *value = NULL;
71be2cbc 2370
7918f24d
NC
2371 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2372
14befaf4 2373 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2374 return;
68dc0745 2375 if (mg->mg_obj) {
8772537c 2376 SV * const ahv = LvTARG(sv);
85fbaab2 2377 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS
2378 if (he)
2379 value = HeVAL(he);
3280af22 2380 if (!value || value == &PL_sv_undef)
be2597df 2381 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2382 }
bbfdc870
FC
2383 else if (LvSTARGOFF(sv) < 0)
2384 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
68dc0745 2385 else {
502c6561 2386 AV *const av = MUTABLE_AV(LvTARG(sv));
bbfdc870 2387 if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av))
a0714e2c 2388 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2389 else {
bbfdc870 2390 SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE);
031c6d82 2391 if (!svp || !(value = *svp))
bbfdc870 2392 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
68dc0745
PP
2393 }
2394 }
b37c2d43 2395 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2396 SvREFCNT_dec(LvTARG(sv));
2397 LvTARG(sv) = value;
71be2cbc 2398 LvTARGLEN(sv) = 0;
68dc0745 2399 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2400 mg->mg_obj = NULL;
68dc0745 2401 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2402}
2403
2404int
864dbfa3 2405Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2406{
7918f24d 2407 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
5648c0ae
DM
2408 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2409 return 0;
810b8aa5
GS
2410}
2411
2412int
864dbfa3 2413Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2414{
7918f24d 2415 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2416 PERL_UNUSED_CONTEXT;
0177730e 2417 PERL_UNUSED_ARG(sv);
565764a8 2418 mg->mg_len = -1;
93a17b20
LW
2419 return 0;
2420}
2421
2422int
864dbfa3 2423Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2424{
35a4481c 2425 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2426
7918f24d
NC
2427 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2428
79072805 2429 if (uf && uf->uf_set)
24f81a43 2430 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2431 return 0;
2432}
2433
c277df42 2434int
faf82a0b
AE
2435Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2436{
488344d2 2437 const char type = mg->mg_type;
7918f24d
NC
2438
2439 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2440
488344d2
NC
2441 if (type == PERL_MAGIC_qr) {
2442 } else if (type == PERL_MAGIC_bm) {
2443 SvTAIL_off(sv);
2444 SvVALID_off(sv);
2445 } else {
2446 assert(type == PERL_MAGIC_fm);
488344d2
NC
2447 }
2448 return sv_unmagic(sv, type);
faf82a0b
AE
2449}
2450
7a4c00b4 2451#ifdef USE_LOCALE_COLLATE
79072805 2452int
864dbfa3 2453Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2454{
7918f24d
NC
2455 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2456
bbce6d69 2457 /*
838b5b74 2458 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2459 * and vanished with a faint plop.
2460 */
96a5add6 2461 PERL_UNUSED_CONTEXT;
8772537c 2462 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2463 if (mg->mg_ptr) {
2464 Safefree(mg->mg_ptr);
2465 mg->mg_ptr = NULL;
565764a8 2466 mg->mg_len = -1;
7a4c00b4 2467 }
bbce6d69
PP
2468 return 0;
2469}
7a4c00b4 2470#endif /* USE_LOCALE_COLLATE */
bbce6d69 2471
7e8c5dac
HS
2472/* Just clear the UTF-8 cache data. */
2473int
2474Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2475{
7918f24d 2476 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2477 PERL_UNUSED_CONTEXT;
8772537c 2478 PERL_UNUSED_ARG(sv);
7e8c5dac 2479 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2480 mg->mg_ptr = NULL;
7e8c5dac
HS
2481 mg->mg_len = -1; /* The mg_len holds the len cache. */
2482 return 0;
2483}
2484
bbce6d69 2485int
864dbfa3 2486Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2487{
97aff369 2488 dVAR;
eb578fdb
KW
2489 const char *s;
2490 I32 paren;
2491 const REGEXP * rx;
2fdbfb4d 2492 const char * const remaining = mg->mg_ptr + 1;
79072805 2493 I32 i;
8990e307 2494 STRLEN len;
125b9982 2495 MAGIC *tmg;
2fdbfb4d 2496
7918f24d
NC
2497 PERL_ARGS_ASSERT_MAGIC_SET;
2498
79072805 2499 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2500 case '\015': /* $^MATCH */
2501 if (strEQ(remaining, "ATCH"))
2502 goto do_match;
2503 case '`': /* ${^PREMATCH} caught below */
2504 do_prematch:
f1b875a0 2505 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2506 goto setparen;
2507 case '\'': /* ${^POSTMATCH} caught below */
2508 do_postmatch:
f1b875a0 2509 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2510 goto setparen;
2511 case '&':
2512 do_match:
f1b875a0 2513 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2514 goto setparen;
2515 case '1': case '2': case '3': case '4':
2516 case '5': case '6': case '7': case '8': case '9':
104a8018 2517 paren = atoi(mg->mg_ptr);
2fdbfb4d 2518 setparen:
1e05feb3 2519 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9bad346 2520 setparen_got_rx:
2fdbfb4d 2521 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
1e05feb3 2522 } else {
2fdbfb4d
AB
2523 /* Croak with a READONLY error when a numbered match var is
2524 * set without a previous pattern match. Unless it's C<local $1>
2525 */
d9bad346 2526 croakparen:
2fdbfb4d 2527 if (!PL_localizing) {
cb077ed2 2528 Perl_croak_no_modify();
2fdbfb4d
AB
2529 }
2530 }
9b9e0be4 2531 break;
748a9306 2532 case '\001': /* ^A */
f2da823f
FC
2533 if (SvOK(sv)) sv_copypv(PL_bodytarget, sv);
2534 else SvOK_off(PL_bodytarget);
64eff8b7
DM
2535 FmLINES(PL_bodytarget) = 0;
2536 if (SvPOK(PL_bodytarget)) {
2537 char *s = SvPVX(PL_bodytarget);
2538 while ( ((s = strchr(s, '\n'))) ) {
2539 FmLINES(PL_bodytarget)++;
2540 s++;
2541 }
2542 }
125b9982 2543 /* mg_set() has temporarily made sv non-magical */
284167a5 2544 if (TAINTING_get) {
125b9982
NT
2545 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2546 SvTAINTED_on(PL_bodytarget);
2547 else
2548 SvTAINTED_off(PL_bodytarget);
2549 }
748a9306 2550 break;
49460fe6 2551 case '\003': /* ^C */
f2338a2e 2552 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS
2553 break;
2554
79072805 2555 case '\004': /* ^D */
b4ab917c 2556#ifdef DEBUGGING
b83604b4 2557 s = SvPV_nolen_const(sv);
ddcf8bc1 2558 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS
2559 if (DEBUG_x_TEST || DEBUG_B_TEST)
2560 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2561#else
38ab35f8 2562 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2563#endif
79072805 2564 break;
28f23441 2565 case '\005': /* ^E */
d0063567 2566 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2567#ifdef VMS
38ab35f8 2568 set_vaxc_errno(SvIV(sv));
e37778c2
NC
2569#else
2570# ifdef WIN32
d0063567 2571 SetLastError( SvIV(sv) );
e37778c2
NC
2572# else
2573# ifdef OS2
38ab35f8 2574 os2_setsyserrno(SvIV(sv));
e37778c2 2575# else
d0063567 2576 /* will anyone ever use this? */
38ab35f8 2577 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ
2578# endif
2579# endif
22fae026 2580#endif
d0063567
DK
2581 }
2582 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2583 SvREFCNT_dec(PL_encoding);
d0063567
DK
2584 if (SvOK(sv) || SvGMAGICAL(sv)) {
2585 PL_encoding = newSVsv(sv);
2586 }
2587 else {
a0714e2c 2588 PL_encoding = NULL;
d0063567
DK
2589 }
2590 }
2591 break;
79072805 2592 case '\006': /* ^F */
38ab35f8 2593 PL_maxsysfd = SvIV(sv);
79072805 2594 break;
a0d0e21e 2595 case '\010': /* ^H */
38ab35f8 2596 PL_hints = SvIV(sv);
a0d0e21e 2597 break;
9d116dd7 2598 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2599 Safefree(PL_inplace);
bd61b366 2600 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2601 break;
d9bad346
FC
2602 case '\016': /* ^N */
2603 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2604 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2605 goto croakparen;
28f23441 2606 case '\017': /* ^O */
ac27b0f5 2607 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2608 Safefree(PL_osname);
bd61b366 2609 PL_osname = NULL;
3511154c
DM
2610 if (SvOK(sv)) {
2611 TAINT_PROPER("assigning to $^O");
2e0de35c 2612 PL_osname = savesvpv(sv);
3511154c 2613 }
ac27b0f5
NIS
2614 }
2615 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2616 STRLEN len;
2617 const char *const start = SvPV(sv, len);
b54fc2b6 2618 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2619 SV *tmp;
8b850bd5
NC
2620
2621
2622 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2623 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC
2624
2625 /* Opening for input is more common than opening for output, so
2626 ensure that hints for input are sooner on linked list. */
59cd0e26 2627 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z
2628 SvUTF8(sv))
2629 : newSVpvs_flags("", SvUTF8(sv));
2630 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2631 mg_set(tmp);
8b850bd5 2632
f747ebd6
Z
2633 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2634 SvUTF8(sv));
2635 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2636 mg_set(tmp);
ac27b0f5 2637 }
28f23441 2638 break;
79072805 2639 case '\020': /* ^P */
2fdbfb4d
AB
2640 if (*remaining == '\0') { /* ^P */
2641 PL_perldb = SvIV(sv);
2642 if (PL_perldb && !PL_DBsingle)
2643 init_debugger();
2644 break;
2645 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2646 goto do_prematch;
2647 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2648 goto do_postmatch;
2649 }
9b9e0be4 2650 break;
79072805 2651 case '\024': /* ^T */
88e89b8a 2652#ifdef BIG_TIME
6b88bc9c 2653 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2654#else
38ab35f8 2655 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2656#endif
79072805 2657 break;
e07ea26a
NC
2658 case '\025': /* ^UTF8CACHE */
2659 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2660 PL_utf8cache = (signed char) sv_2iv(sv);
2661 }
2662 break;
fde18df1 2663 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2664 if (*(mg->mg_ptr+1) == '\0') {
2665 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2666 i = SvIV(sv);
ac27b0f5 2667 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2668 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2669 }
599cee73 2670 }
0a378802 2671 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2672 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
7e4f0450
FC
2673 if (!SvPOK(sv)) {
2674 PL_compiling.cop_warnings = pWARN_STD;
d775746e
GS
2675 break;
2676 }
f4fc7782 2677 {
b5477537 2678 STRLEN len, i;
d3a7d8c7 2679 int accumulate = 0 ;
f4fc7782 2680 int any_fatals = 0 ;
b83604b4 2681 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2682 for (i = 0 ; i < len ; ++i) {
2683 accumulate |= ptr[i] ;
2684 any_fatals |= (ptr[i] & 0xAA) ;
2685 }
4243c432
NC
2686 if (!accumulate) {
2687 if (!specialWARN(PL_compiling.cop_warnings))
2688 PerlMemShared_free(PL_compiling.cop_warnings);
2689 PL_compiling.cop_warnings = pWARN_NONE;
2690 }
72dc9ed5 2691 /* Yuck. I can't see how to abstract this: */
2f3f0b56
KW
2692 else if (isWARN_on(
2693 ((STRLEN *)SvPV_nolen_const(sv)) - 1,
2694 WARN_ALL)
2695 && !any_fatals)
2696 {
4243c432
NC
2697 if (!specialWARN(PL_compiling.cop_warnings))
2698 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2699 PL_compiling.cop_warnings = pWARN_ALL;
2700 PL_dowarn |= G_WARN_ONCE ;
727405f8 2701 }
d3a7d8c7 2702 else {
72dc9ed5
NC
2703 STRLEN len;
2704 const char *const p = SvPV_const(sv, len);
2705
2706 PL_compiling.cop_warnings
8ee4cf24 2707 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2708 p, len);
2709
d3a7d8c7
GS
2710 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2711 PL_dowarn |= G_WARN_ONCE ;
2712 }
f4fc7782 2713
d3a7d8c7 2714 }
4438c4b7 2715 }
971a9dd3 2716 }
79072805
LW
2717 break;
2718 case '.':
3280af22
NIS
2719 if (PL_localizing) {
2720 if (PL_localizing == 1)
7766f137 2721 SAVESPTR(PL_last_in_gv);
748a9306 2722 }
3280af22 2723 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2724 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2725 break;
2726 case '^':
acbe1b9d
FC
2727 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2728 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2729 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2730 break;
2731 case '~':
acbe1b9d
FC
2732 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2733 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2734 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2735 break;
2736 case '=':
acbe1b9d 2737 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2738 break;
2739 case '-':
acbe1b9d
FC
2740 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2741 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
099be4f1 2742 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2743 break;
2744 case '%':
acbe1b9d 2745 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2746 break;
2747 case '|':
4b65379b 2748 {
099be4f1 2749 IO * const io = GvIO(PL_defoutgv);
720f287d
AB
2750 if(!io)
2751 break;
38ab35f8 2752 if ((SvIV(sv)) == 0)
4b65379b
CS
2753 IoFLAGS(io) &= ~IOf_FLUSH;
2754 else {
2755 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2756 PerlIO *ofp = IoOFP(io);
2757 if (ofp)
2758 (void)PerlIO_flush(ofp);
2759 IoFLAGS(io) |= IOf_FLUSH;
2760 }
2761 }
79072805
LW
2762 }
2763 break;
79072805 2764 case '/':
3280af22 2765 SvREFCNT_dec(PL_rs);
8bfdd7d9 2766 PL_rs = newSVsv(sv);
79072805
LW
2767 break;
2768 case '\\':
ef8d46e8 2769 SvREFCNT_dec(PL_ors_sv);
6bc2995b 2770 if (SvOK(sv)) {
7889fe52 2771 PL_ors_sv = newSVsv(sv);
009c130f 2772 }
e3c19b7b 2773 else {
a0714e2c 2774 PL_ors_sv = NULL;
e3c19b7b 2775 }
79072805 2776 break;
7d69d4a6
FC
2777 case '[':
2778 if (SvIV(sv) != 0)
2779 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2780 break;
79072805 2781 case '?':
ff0cee69 2782#ifdef COMPLEX_STATUS
6b88bc9c 2783 if (PL_localizing == 2) {
41cb7b2b 2784 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
2785 PL_statusvalue = LvTARGOFF(sv);
2786 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2787 }
2788 else
2789#endif
2790#ifdef VMSISH_STATUS
2791 if (VMSISH_STATUS)
fb38d079 2792 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2793 else
2794#endif
38ab35f8 2795 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2796 break;
2797 case '!':
93189314
JH
2798 {
2799#ifdef VMS
2800# define PERL_VMS_BANG vaxc$errno
2801#else
2802# define PERL_VMS_BANG 0
2803#endif
91487cfc 2804 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2805 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2806 }
79072805
LW
2807 break;
2808 case '<':
985213f2 2809 {
dfff4baf 2810 const Uid_t new_uid = SvUID(sv);
985213f2 2811 PL_delaymagic_uid = new_uid;
3280af22
NIS
2812 if (PL_delaymagic) {
2813 PL_delaymagic |= DM_RUID;
79072805
LW
2814 break; /* don't do magic till later */
2815 }
2816#ifdef HAS_SETRUID
dfff4baf 2817 (void)setruid(new_uid);
79072805
LW
2818#else
2819#ifdef HAS_SETREUID
dfff4baf 2820 (void)setreuid(new_uid, (Uid_t)-1);
748a9306 2821#else
85e6fe83 2822#ifdef HAS_SETRESUID
dfff4baf 2823 (void)setresuid(new_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2824#else
985213f2 2825 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
75870ed3 2826#ifdef PERL_DARWIN
2827 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
985213f2 2828 if (new_uid != 0 && PerlProc_getuid() == 0)
75870ed3 2829 (void)PerlProc_setuid(0);
2830#endif
985213f2 2831 (void)PerlProc_setuid(new_uid);
75870ed3 2832 } else {
cea2e8a9 2833 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2834 }
79072805
LW
2835#endif
2836#endif
85e6fe83 2837#endif
79072805 2838 break;
985213f2 2839 }
79072805 2840 case '>':
985213f2 2841 {
dfff4baf 2842 const Uid_t new_euid = SvUID(sv);
985213f2 2843 PL_delaymagic_euid = new_euid;
3280af22
NIS
2844 if (PL_delaymagic) {
2845 PL_delaymagic |= DM_EUID;
79072805
LW
2846 break; /* don't do magic till later */
2847 }
2848#ifdef HAS_SETEUID
dfff4baf 2849 (void)seteuid(new_euid);
79072805
LW
2850#else
2851#ifdef HAS_SETREUID
dfff4baf 2852 (void)setreuid((Uid_t)-1, new_euid);
85e6fe83
LW
2853#else
2854#ifdef HAS_SETRESUID
dfff4baf 2855 (void)setresuid((Uid_t)-1, new_euid, (Uid_t)-1);
79072805 2856#else
985213f2 2857 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
382669a9 2858 PerlProc_setuid(new_euid);
a0d0e21e 2859 else {
cea2e8a9 2860 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2861 }
79072805
LW
2862#endif
2863#endif
85e6fe83 2864#endif
79072805 2865 break;
985213f2 2866 }
79072805 2867 case '(':
985213f2 2868 {
dfff4baf 2869 const Gid_t new_gid = SvGID(sv);
985213f2 2870 PL_delaymagic_gid = new_gid;
3280af22
NIS
2871 if (PL_delaymagic) {
2872 PL_delaymagic |= DM_RGID;
79072805
LW
2873 break; /* don't do magic till later */
2874 }
2875#ifdef HAS_SETRGID
dfff4baf 2876 (void)setrgid(new_gid);
79072805
LW
2877#else
2878#ifdef HAS_SETREGID
dfff4baf 2879 (void)setregid(new_gid, (Gid_t)-1);
85e6fe83
LW
2880#else
2881#ifdef HAS_SETRESGID
dfff4baf 2882 (void)setresgid(new_gid, (Gid_t)-1, (Gid_t) -1);
79072805 2883#else
985213f2
AB
2884 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2885 (void)PerlProc_setgid(new_gid);
748a9306 2886 else {
cea2e8a9 2887 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2888 }
79072805
LW
2889#endif
2890#endif
85e6fe83 2891#endif
79072805 2892 break;
985213f2 2893 }
79072805 2894 case ')':
985213f2 2895 {
dfff4baf 2896 Gid_t new_egid;
5cd24f17
PP
2897#ifdef HAS_SETGROUPS
2898 {
b83604b4 2899 const char *p = SvPV_const(sv, len);
757f63d8 2900 Groups_t *gary = NULL;
fb4089e0 2901#ifdef _SC_NGROUPS_MAX
2902 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2903
2904 if (maxgrp < 0)
2905 maxgrp = NGROUPS;
2906#else
2907 int maxgrp = NGROUPS;
2908#endif
757f63d8
SP
2909
2910 while (isSPACE(*p))
2911 ++p;
dfff4baf 2912 new_egid = (Gid_t)Atol(p);
fb4089e0 2913 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP
2914 while (*p && !isSPACE(*p))
2915 ++p;
2916 while (isSPACE(*p))
2917 ++p;
2918 if (!*p)
2919 break;
2920 if(!gary)
2921 Newx(gary, i + 1, Groups_t);
2922 else
2923 Renew(gary, i + 1, Groups_t);
dfff4baf 2924 gary[i] = (Groups_t)Atol(p);
757f63d8
SP
2925 }
2926 if (i)
2927 (void)setgroups(i, gary);
f5a63d97 2928 Safefree(gary);
5cd24f17
PP
2929 }
2930#else /* HAS_SETGROUPS */
dfff4baf 2931 new_egid = SvGID(sv);
5cd24f17 2932#endif /* HAS_SETGROUPS */
985213f2 2933 PL_delaymagic_egid = new_egid;
3280af22
NIS
2934 if (PL_delaymagic) {
2935 PL_delaymagic |= DM_EGID;
79072805
LW
2936 break; /* don't do magic till later */
2937 }
2938#ifdef HAS_SETEGID
dfff4baf 2939 (void)setegid(new_egid);
79072805
LW
2940#else
2941#ifdef HAS_SETREGID
dfff4baf 2942 (void)setregid((Gid_t)-1, new_egid);
85e6fe83
LW
2943#else
2944#ifdef HAS_SETRESGID
dfff4baf 2945 (void)setresgid((Gid_t)-1, new_egid, (Gid_t)-1);
79072805 2946#else
985213f2
AB
2947 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2948 (void)PerlProc_setgid(new_egid);
748a9306 2949 else {
cea2e8a9 2950 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2951 }
79072805
LW
2952#endif
2953#endif
85e6fe83 2954#endif
79072805 2955 break;
985213f2 2956 }
79072805 2957 case ':':
2d8e6c8d 2958 PL_chopset = SvPV_force(sv,len);
79072805 2959 break;
9cdac2a2
FC
2960 case '$': /* $$ */
2961 /* Store the pid in mg->mg_obj so we can tell when a fork has
2962 occurred. mg->mg_obj points to *$ by default, so clear it. */
2963 if (isGV(mg->mg_obj)) {
2964 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2965 SvREFCNT_dec(mg->mg_obj);
2966 mg->mg_flags |= MGf_REFCOUNTED;
2967 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2968 }
2969 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2970 break;
79072805 2971 case '0':
e2975953 2972 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2973#ifdef HAS_SETPROCTITLE
2974 /* The BSDs don't show the argv[] in ps(1) output, they
2975 * show a string from the process struct and provide
2976 * the setproctitle() routine to manipulate that. */
a2722ac9 2977 if (PL_origalen != 1) {
b83604b4 2978 s = SvPV_const(sv, len);
98b76f99 2979# if __FreeBSD_version > 410001
9aad2c0e 2980 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2981 * but not the "(perl) suffix from the ps(1)
2982 * output, because that's what ps(1) shows if the
2983 * argv[] is modified. */
6f2ad931 2984 setproctitle("-%s", s);
9aad2c0e 2985# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2986 /* This doesn't really work if you assume that
2987 * $0 = 'foobar'; will wipe out 'perl' from the $0
2988 * because in ps(1) output the result will be like
2989 * sprintf("perl: %s (perl)", s)
2990 * I guess this is a security feature:
2991 * one (a user process) cannot get rid of the original name.
2992 * --jhi */
2993 setproctitle("%s", s);
2994# endif
2995 }
9d3968b2 2996#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2997 if (PL_origalen != 1) {
17aa7f3d 2998 union pstun un;
b83604b4 2999 s = SvPV_const(sv, len);
6867be6d 3000 un.pst_command = (char *)s;
17aa7f3d
JH
3001 pstat(PSTAT_SETCMD, un, len, 0, 0);
3002 }
9d3968b2 3003#else
2d2af554
GA
3004 if (PL_origalen > 1) {
3005 /* PL_origalen is set in perl_parse(). */
3006 s = SvPV_force(sv,len);
3007 if (len >= (STRLEN)PL_origalen-1) {
3008 /* Longer than original, will be truncated. We assume that
3009 * PL_origalen bytes are available. */
3010 Copy(s, PL_origargv[0], PL_origalen-1, char);
3011 }
3012 else {
3013 /* Shorter than original, will be padded. */
235ac35d 3014#ifdef PERL_DARWIN
60777a0d
JH
3015 /* Special case for Mac OS X: see [perl #38868] */
3016 const int pad = 0;
235ac35d 3017#else
8a89a4f1
MB
3018 /* Is the space counterintuitive? Yes.
3019 * (You were expecting \0?)
3020 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3021 * --jhi */
60777a0d 3022 const int pad = ' ';
235ac35d 3023#endif
60777a0d
JH
3024 Copy(s, PL_origargv[0], len, char);
3025 PL_origargv[0][len] = 0;
3026 memset(PL_origargv[0] + len + 1,
3027 pad, PL_origalen - len - 1);
2d2af554
GA
3028 }
3029 PL_origargv[0][PL_origalen-1] = 0;
3030 for (i = 1; i < PL_origargc; i++)
3031 PL_origargv[i] = 0;
7636ea95
AB
3032#ifdef HAS_PRCTL_SET_NAME
3033 /* Set the legacy process name in addition to the POSIX name on Linux */
3034 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3035 /* diag_listed_as: SKIPME */
3036 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3037 }
3038#endif
79072805 3039 }
9d3968b2 3040#endif
e2975953 3041 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW
3042 break;
3043 }
3044 return 0;
3045}
3046
3047I32
84c7b88c
BF
3048Perl_whichsig_sv(pTHX_ SV *sigsv)
3049{
3050 const char *sigpv;
3051 STRLEN siglen;
3052 PERL_ARGS_ASSERT_WHICHSIG_SV;
3053 PERL_UNUSED_CONTEXT;
3054 sigpv = SvPV_const(sigsv, siglen);
3055 return whichsig_pvn(sigpv, siglen);
3056}
3057
3058I32
3059Perl_whichsig_pv(pTHX_ const char *sig)
3060{
3061 PERL_ARGS_ASSERT_WHICHSIG_PV;
3062 PERL_UNUSED_CONTEXT;
3063 return whichsig_pvn(sig, strlen(sig));
3064}
3065
3066I32
3067Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
79072805 3068{
eb578fdb 3069 char* const* sigv;
7918f24d 3070
84c7b88c 3071 PERL_ARGS_ASSERT_WHICHSIG_PVN;
96a5add6 3072 PERL_UNUSED_CONTEXT;
79072805 3073
aadb217d 3074 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
84c7b88c 3075 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
aadb217d 3076 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805 3077#ifdef SIGCLD
84c7b88c 3078 if (memEQs(sig, len, "CHLD"))
79072805
LW
3079 return SIGCLD;
3080#endif
3081#ifdef SIGCHLD
84c7b88c 3082 if (memEQs(sig, len, "CLD"))
79072805
LW
3083 return SIGCHLD;
3084#endif
7f1236c0 3085 return -1;
79072805
LW
3086}
3087
ecfc5424 3088Signal_t
1e82f5a6 3089#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3090Perl_sighandler(int sig, siginfo_t *sip, void *uap)
1e82f5a6
SH
3091#else
3092Perl_sighandler(int sig)
3093#endif
79072805 3094{
1018e26f
NIS
3095#ifdef PERL_GET_SIG_CONTEXT
3096 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 3097#else
cea2e8a9 3098 dTHX;
71d280e3 3099#endif
79072805 3100 dSP;
a0714e2c
SS
3101 GV *gv = NULL;
3102 SV *sv = NULL;
8772537c 3103 SV * const tSv = PL_Sv;
601f1833 3104 CV *cv = NULL;
533c011a 3105 OP *myop = PL_op;
84902520 3106 U32 flags = 0;
8772537c 3107 XPV * const tXpv = PL_Xpv;
0c4d3b5e 3108 I32 old_ss_ix = PL_savestack_ix;
100c03aa 3109 SV *errsv_save = NULL;
71d280e3 3110
84902520 3111
727405f8 3112 if (!PL_psig_ptr[sig]) {
99ef548b 3113 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
3114 PL_sig_name[sig]);
3115 exit(sig);
3116 }
ff0cee69 3117
a0d63a7b
DM
3118 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3119 /* Max number of items pushed there is 3*n or 4. We cannot fix
3120 infinity, so we fix 4 (in fact 5): */
3121 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3122 flags |= 1;
3123 PL_savestack_ix += 5; /* Protect save in progress. */
3124 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3125 }
84902520 3126 }
84902520 3127 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 3128 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL
3129 || SvTYPE(cv) != SVt_PVCV) {
3130 HV *st;
f2c0649b 3131 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 3132 }
84902520 3133
a0d0e21e 3134 if (!cv || !CvROOT(cv)) {
a2a5de95
NC
3135 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3136 PL_sig_name[sig], (gv ? GvENAME(gv)
3137 : ((cv && CvGV(cv))
3138 ? GvENAME(CvGV(cv))
3139 : "__ANON__")));
00d579c5 3140 goto cleanup;
79072805
LW
3141 }
3142
0c4d3b5e
DM
3143 sv = PL_psig_name[sig]
3144 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3145 : newSVpv(PL_sig_name[sig],0);
72048cfe 3146 flags |= 8;
0c4d3b5e
DM
3147 SAVEFREESV(sv);
3148
a0d63a7b
DM
3149 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3150 /* make sure our assumption about the size of the SAVEs are correct:
3151 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3152 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3153 }
e336de0d 3154
e788e7d3 3155 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 3156 PUSHMARK(SP);
79072805 3157 PUSHs(sv);
8aad04aa
JH
3158#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3159 {
3160 struct sigaction oact;
3161
3162 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH
3163 if (sip) {
3164 HV *sih = newHV();
ad64d0ec 3165 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH
3166 /* The siginfo fields signo, code, errno, pid, uid,
3167 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC
3168 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3169 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 3170#if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
85771703
NC
3171 hv_stores(sih, "errno", newSViv(sip->si_errno));
3172 hv_stores(sih, "status", newSViv(sip->si_status));
3173 hv_stores(sih, "uid", newSViv(sip->si_uid));
3174 hv_stores(sih, "pid", newSViv(sip->si_pid));
3175 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3176 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 3177#endif
8aad04aa 3178 EXTEND(SP, 2);
ad64d0ec 3179 PUSHs(rv);
22f1178f 3180 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 3181 }
b4552a27 3182
8aad04aa
JH
3183 }
3184 }
3185#endif
79072805 3186 PUTBACK;
a0d0e21e 3187
100c03aa
JL
3188 errsv_save = newSVsv(ERRSV);
3189
ad64d0ec 3190 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 3191
d3acc0f7 3192 POPSTACK;
eed484f9
DD
3193 {
3194 SV * const errsv = ERRSV;
3195 if (SvTRUE_NN(errsv)) {
3196 SvREFCNT_dec(errsv_save);
c22d665b 3197#ifndef PERL_MICRO
1b266415
NIS
3198 /* Handler "died", for example to get out of a restart-able read().
3199 * Before we re-do that on its behalf re-enable the signal which was
3200 * blocked by the system when we entered.
3201 */
c22d665b 3202#ifdef HAS_SIGPROCMASK
d488af49 3203#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
eed484f9 3204 if (sip || uap)
c22d665b 3205#endif
eed484f9
DD
3206 {
3207 sigset_t set;
3208 sigemptyset(&set);
3209 sigaddset(&set,sig);
3210 sigprocmask(SIG_UNBLOCK, &set, NULL);
3211 }
c22d665b 3212#else
eed484f9
DD
3213 /* Not clear if this will work */
3214 (void)rsignal(sig, SIG_IGN);
3215 (void)rsignal(sig, PL_csighandlerp);
c22d665b
LT
3216#endif
3217#endif /* !PERL_MICRO */
eed484f9
DD
3218 die_sv(errsv);
3219 }
3220 else {
3221 sv_setsv(errsv, errsv_save);
3222 SvREFCNT_dec(errsv_save);
3223 }
100c03aa
JL
3224 }
3225
00d579c5 3226cleanup:
0c4d3b5e
DM
3227 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3228 PL_savestack_ix = old_ss_ix;
72048cfe 3229 if (flags & 8)
2357bae7 3230 SvREFCNT_dec_NN(sv);
533c011a 3231 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3232
3280af22
NIS
3233 PL_Sv = tSv; /* Restore global temporaries. */
3234 PL_Xpv = tXpv;
53bb94e2 3235 return;
79072805 3236}
4e35701f
NIS
3237
3238
51371543 3239static void
8772537c 3240S_restore_magic(pTHX_ const void *p)
51371543 3241{
97aff369 3242 dVAR;
8772537c
AL
3243 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3244 SV* const sv = mgs->mgs_sv;
150b625d 3245 bool bumped;
51371543
GS
3246
3247 if (!sv)
3248 return;
3249
4bac9ae4
CS
3250 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3251 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
f8c7b90f 3252#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
3253 /* While magic was saved (and off) sv_setsv may well have seen
3254 this SV as a prime candidate for COW. */
3255 if (SvIsCOW(sv))
e424a81e 3256 sv_force_normal_flags(sv, 0);
f9701176 3257#endif
f9c6fee5
CS
3258 if (mgs->mgs_readonly)
3259 SvREADONLY_on(sv);
3260 if (mgs->mgs_magical)
3261 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS
3262 else
3263 mg_magical(sv);
51371543
GS
3264 }
3265
150b625d 3266 bumped = mgs->mgs_bumped;
51371543
GS
3267 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3268
3269 /* If we're still on top of the stack, pop us off. (That condition
3270 * will be satisfied if restore_magic was called explicitly, but *not*
3271 * if it's being called via leave_scope.)
3272 * The reason for doing this is that otherwise, things like sv_2cv()
3273 * may leave alloc gunk on the savestack, and some code
3274 * (e.g. sighandler) doesn't expect that...
3275 */
3276 if (PL_savestack_ix == mgs->mgs_ss_ix)
3277 {
1be36ce0
NC
3278 UV popval = SSPOPUV;
3279 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3280 PL_savestack_ix -= 2;
1be36ce0
NC
3281 popval = SSPOPUV;
3282 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3283 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543 3284 }
150b625d
DM
3285 if (bumped) {
3286 if (SvREFCNT(sv) == 1) {
3287 /* We hold the last reference to this SV, which implies that the
3288 SV was deleted as a side effect of the routines we called.
3289 So artificially keep it alive a bit longer.
3290 We avoid turning on the TEMP flag, which can cause the SV's
3291 buffer to get stolen (and maybe other stuff). */
150b625d 3292 sv_2mortal(sv);
4bac9ae4 3293 SvTEMP_off(sv);
8985fe98 3294 }
150b625d 3295 else
2357bae7 3296 SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */
8985fe98 3297 }
51371543
GS
3298}
3299
0c4d3b5e
DM
3300/* clean up the mess created by Perl_sighandler().
3301 * Note that this is only called during an exit in a signal handler;
3302 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
9a7f166c 3303 * skipped over. */
0c4d3b5e 3304
51371543 3305static void
8772537c 3306S_unwind_handler_stack(pTHX_ const void *p)
51371543 3307{
27da23d5 3308 dVAR;
0c4d3b5e 3309 PERL_UNUSED_ARG(p);
7918f24d 3310
0c4d3b5e 3311 PL_savestack_ix -= 5; /* Unprotect save in progress. */
51371543 3312}
1018e26f 3313
66610fdd 3314/*
b3ca2e83
NC
3315=for apidoc magic_sethint
3316
3317Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3318C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3319anything that would need a deep copy. Maybe we should warn if we find a
3320reference.
b3ca2e83
NC
3321
3322=cut
3323*/
3324int
3325Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3326{
3327 dVAR;
ad64d0ec 3328 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
59cd0e26 3329 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
b3ca2e83 3330
7918f24d
NC
3331 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3332
e6e3e454
NC
3333 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3334 an alternative leaf in there, with PL_compiling.cop_hints being used if
3335 it's NULL. If needed for threads, the alternative could lock a mutex,
3336 or take other more complex action. */
3337
5b9c0671
NC
3338 /* Something changed in %^H, so it will need to be restored on scope exit.
3339 Doing this here saves a lot of doing it manually in perl code (and
3340 forgetting to do it, and consequent subtle errors. */
3341 PL_hints |= HINT_LOCALIZE_HH;
20439bc7
Z
3342 CopHINTHASH_set(&PL_compiling,
3343 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
b3ca2e83
NC
3344 return 0;
3345}
3346
3347/*
f175cff5 3348=for apidoc magic_clearhint
b3ca2e83 3349
c28fe1ec
NC
3350Triggered by a delete from %^H, records the key to
3351C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3352
3353=cut
3354*/
3355int
3356Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3357{
3358 dVAR;
7918f24d
NC
3359
3360 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
f5a63d97
AL
3361 PERL_UNUSED_ARG(sv);
3362
5b9c0671 3363 PL_hints |= HINT_LOCALIZE_HH;
20439bc7 3364 CopHINTHASH_set(&PL_compiling,
e3352591
FC
3365 mg->mg_len == HEf_SVKEY
3366 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3367 MUTABLE_SV(mg->mg_ptr), 0, 0)
3368 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3369 mg->mg_ptr, mg->mg_len, 0, 0));
b3ca2e83
NC
3370 return 0;
3371}
3372
3373/*
f747ebd6
Z
3374=for apidoc magic_clearhints
3375
3376Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3377
3378=cut
3379*/
3380int
3381Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3382{
3383 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3384 PERL_UNUSED_ARG(sv);
3385 PERL_UNUSED_ARG(mg);
20439bc7
Z
3386 cophh_free(CopHINTHASH_get(&PL_compiling));
3387 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
f747ebd6
Z
3388 return 0;
3389}
3390
09fb282d
FC
3391int
3392Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3393 const char *name, I32 namlen)
3394{
3395 MAGIC *nmg;
3396
3397 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
4f8dbb2d 3398 PERL_UNUSED_ARG(sv);
09fb282d
FC
3399 PERL_UNUSED_ARG(name);
3400 PERL_UNUSED_ARG(namlen);
3401
3402 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3403 nmg = mg_find(nsv, mg->mg_type);
3404 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3405 nmg->mg_ptr = mg->mg_ptr;
3406 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3407 nmg->mg_flags |= MGf_REFCOUNTED;
3408 return 1;
3409}
3410
f747ebd6 3411/*
66610fdd
RGS
3412 * Local variables:
3413 * c-indentation-style: bsd
3414 * c-basic-offset: 4
14d04a33 3415 * indent-tabs-mode: nil
66610fdd
RGS
3416 * End:
3417 *
14d04a33 3418 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3419 */