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Stop calling get-magic twice for lvalue pos($utf8)
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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
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LW
42#include "perl.h"
43
5cd24f17 44#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
45# ifdef I_GRP
46# include <grp.h>
47# endif
188ea221
CS
48#endif
49
757f63d8
SP
50#if defined(HAS_SETGROUPS)
51# ifndef NGROUPS
52# define NGROUPS 32
53# endif
54#endif
55
17aa7f3d
JH
56#ifdef __hpux
57# include <sys/pstat.h>
58#endif
59
7636ea95
AB
60#ifdef HAS_PRCTL_SET_NAME
61# include <sys/prctl.h>
62#endif
63
8aad04aa 64#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 65Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 66#else
e69880a5 67Signal_t Perl_csighandler(int sig);
8aad04aa 68#endif
e69880a5 69
9cffb111
OS
70#ifdef __Lynx__
71/* Missing protos on LynxOS */
72void setruid(uid_t id);
73void seteuid(uid_t id);
74void setrgid(uid_t id);
75void setegid(uid_t id);
76#endif
77
c07a80fd 78/*
4bac9ae4 79 * Pre-magic setup and post-magic takedown.
c07a80fd
PP
80 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
81 */
82
83struct magic_state {
84 SV* mgs_sv;
455ece5e 85 I32 mgs_ss_ix;
f9c6fee5
CS
86 U32 mgs_magical;
87 bool mgs_readonly;
150b625d 88 bool mgs_bumped;
c07a80fd 89};
455ece5e 90/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
91
92STATIC void
8fb26106 93S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 94{
97aff369 95 dVAR;
455ece5e 96 MGS* mgs;
150b625d 97 bool bumped = FALSE;
7918f24d
NC
98
99 PERL_ARGS_ASSERT_SAVE_MAGIC;
100
4bac9ae4
CS
101 assert(SvMAGICAL(sv));
102
150b625d
DM
103 /* we shouldn't really be called here with RC==0, but it can sometimes
104 * happen via mg_clear() (which also shouldn't be called when RC==0,
105 * but it can happen). Handle this case gracefully(ish) by not RC++
106 * and thus avoiding the resultant double free */
107 if (SvREFCNT(sv) > 0) {
108 /* guard against sv getting freed midway through the mg clearing,
109 * by holding a private reference for the duration. */
110 SvREFCNT_inc_simple_void_NN(sv);
111 bumped = TRUE;
112 }
8985fe98 113
d8b2590f
NC
114 /* Turning READONLY off for a copy-on-write scalar (including shared
115 hash keys) is a bad idea. */
765f542d 116 if (SvIsCOW(sv))
9a265e59 117 sv_force_normal_flags(sv, 0);
c07a80fd 118
8772537c 119 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
120
121 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd 122 mgs->mgs_sv = sv;
f9c6fee5
CS
123 mgs->mgs_magical = SvMAGICAL(sv);
124 mgs->mgs_readonly = SvREADONLY(sv) != 0;
455ece5e 125 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
150b625d 126 mgs->mgs_bumped = bumped;
c07a80fd
PP
127
128 SvMAGICAL_off(sv);
129 SvREADONLY_off(sv);
c07a80fd
PP
130}
131
954c1994
GS
132/*
133=for apidoc mg_magical
134
135Turns on the magical status of an SV. See C<sv_magic>.
136
137=cut
138*/
139
8990e307 140void
864dbfa3 141Perl_mg_magical(pTHX_ SV *sv)
8990e307 142{
e1ec3a88 143 const MAGIC* mg;
7918f24d 144 PERL_ARGS_ASSERT_MG_MAGICAL;
96a5add6 145 PERL_UNUSED_CONTEXT;
f9c6fee5
CS
146
147 SvMAGICAL_off(sv);
218787bd 148 if ((mg = SvMAGIC(sv))) {
218787bd
VP
149 do {
150 const MGVTBL* const vtbl = mg->mg_virtual;
151 if (vtbl) {
152 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
153 SvGMAGICAL_on(sv);
154 if (vtbl->svt_set)
155 SvSMAGICAL_on(sv);
156 if (vtbl->svt_clear)
157 SvRMAGICAL_on(sv);
158 }
159 } while ((mg = mg->mg_moremagic));
160 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
161 SvRMAGICAL_on(sv);
8990e307
LW
162 }
163}
164
954c1994
GS
165/*
166=for apidoc mg_get
167
168Do magic after a value is retrieved from the SV. See C<sv_magic>.
169
170=cut
171*/
172
79072805 173int
864dbfa3 174Perl_mg_get(pTHX_ SV *sv)
79072805 175{
97aff369 176 dVAR;
35a4481c 177 const I32 mgs_ix = SSNEW(sizeof(MGS));
a9844598 178 bool saved = FALSE;
f9c6fee5 179 bool have_new = 0;
ff76feab 180 MAGIC *newmg, *head, *cur, *mg;
6683b158 181
7918f24d
NC
182 PERL_ARGS_ASSERT_MG_GET;
183
407287f9
FC
184 if (PL_localizing == 1 && sv == DEFSV) return 0;
185
ff76feab
AMS
186 /* We must call svt_get(sv, mg) for each valid entry in the linked
187 list of magic. svt_get() may delete the current entry, add new
188 magic to the head of the list, or upgrade the SV. AMS 20010810 */
189
190 newmg = cur = head = mg = SvMAGIC(sv);
191 while (mg) {
35a4481c 192 const MGVTBL * const vtbl = mg->mg_virtual;
f9c6fee5 193 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
ff76feab 194
2b260de0 195 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
a9844598
CS
196
197 /* taint's mg get is so dumb it doesn't need flag saving */
198 if (!saved && mg->mg_type != PERL_MAGIC_taint) {
199 save_magic(mgs_ix, sv);
200 saved = TRUE;
201 }
202
16c91539 203 vtbl->svt_get(aTHX_ sv, mg);
b77f7d40 204
58f82c5c
DM
205 /* guard against magic having been deleted - eg FETCH calling
206 * untie */
f9c6fee5
CS
207 if (!SvMAGIC(sv)) {
208 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
58f82c5c 209 break;
f9c6fee5 210 }
b77f7d40 211
f9c6fee5 212 /* recalculate flags if this entry was deleted. */
ff76feab 213 if (mg->mg_flags & MGf_GSKIP)
f9c6fee5 214 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
a0d0e21e 215 }
7d1328bb
FC
216 else if (vtbl == &PL_vtbl_utf8) {
217 /* get-magic can reallocate the PV */
218 magic_setutf8(sv, mg);
219 }
ff76feab 220
f9c6fee5 221 mg = nextmg;
ff76feab 222
0723351e 223 if (have_new) {
ff76feab
AMS
224 /* Have we finished with the new entries we saw? Start again
225 where we left off (unless there are more new entries). */
226 if (mg == head) {
0723351e 227 have_new = 0;
ff76feab
AMS
228 mg = cur;
229 head = newmg;
230 }
231 }
232
233 /* Were any new entries added? */
0723351e
NC
234 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
235 have_new = 1;
ff76feab
AMS
236 cur = mg;
237 mg = newmg;
f9c6fee5 238 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
760ac839 239 }
79072805 240 }
463ee0b2 241
a9844598
CS
242 if (saved)
243 restore_magic(INT2PTR(void *, (IV)mgs_ix));
244
79072805
LW
245 return 0;
246}
247
954c1994
GS
248/*
249=for apidoc mg_set
250
251Do magic after a value is assigned to the SV. See C<sv_magic>.
252
253=cut
254*/
255
79072805 256int
864dbfa3 257Perl_mg_set(pTHX_ SV *sv)
79072805 258{
97aff369 259 dVAR;
35a4481c 260 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 261 MAGIC* mg;
463ee0b2
LW
262 MAGIC* nextmg;
263
7918f24d
NC
264 PERL_ARGS_ASSERT_MG_SET;
265
b5ed8c44
FC
266 if (PL_localizing == 2 && sv == DEFSV) return 0;
267
455ece5e 268 save_magic(mgs_ix, sv);
463ee0b2
LW
269
270 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 271 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 272 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
273 if (mg->mg_flags & MGf_GSKIP) {
274 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
f9c6fee5 275 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
a0d0e21e 276 }
e0a73de4 277 if (PL_localizing == 2
b5ed8c44 278 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
e7cbf6c6 279 continue;
2b260de0 280 if (vtbl && vtbl->svt_set)
16c91539 281 vtbl->svt_set(aTHX_ sv, mg);
79072805 282 }
463ee0b2 283
8772537c 284 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
285 return 0;
286}
287
954c1994
GS
288/*
289=for apidoc mg_length
290
291Report on the SV's length. See C<sv_magic>.
292
293=cut
294*/
295
79072805 296U32
864dbfa3 297Perl_mg_length(pTHX_ SV *sv)
79072805 298{
97aff369 299 dVAR;
79072805 300 MAGIC* mg;
463ee0b2 301 STRLEN len;
463ee0b2 302
7918f24d
NC
303 PERL_ARGS_ASSERT_MG_LENGTH;
304
79072805 305 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 306 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 307 if (vtbl && vtbl->svt_len) {
35a4481c 308 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 309 save_magic(mgs_ix, sv);
a0d0e21e 310 /* omit MGf_GSKIP -- not changed here */
16c91539 311 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 312 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
313 return len;
314 }
315 }
316
d0644529
NC
317 {
318 /* You can't know whether it's UTF-8 until you get the string again...
319 */
10516c54 320 const U8 *s = (U8*)SvPV_const(sv, len);
d0644529
NC
321
322 if (DO_UTF8(sv)) {
323 len = utf8_length(s, s + len);
324 }
5636d518 325 }
463ee0b2 326 return len;
79072805
LW
327}
328
8fb26106 329I32
864dbfa3 330Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
331{
332 MAGIC* mg;
ac27b0f5 333
7918f24d
NC
334 PERL_ARGS_ASSERT_MG_SIZE;
335
93965878 336 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 337 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 338 if (vtbl && vtbl->svt_len) {
35a4481c
AL
339 const I32 mgs_ix = SSNEW(sizeof(MGS));
340 I32 len;
455ece5e 341 save_magic(mgs_ix, sv);
93965878 342 /* omit MGf_GSKIP -- not changed here */
16c91539 343 len = vtbl->svt_len(aTHX_ sv, mg);
8772537c 344 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
345 return len;
346 }
347 }
348
349 switch(SvTYPE(sv)) {
350 case SVt_PVAV:
502c6561 351 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
93965878
NIS
352 case SVt_PVHV:
353 /* FIXME */
354 default:
cea2e8a9 355 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
356 break;
357 }
358 return 0;
359}
360
954c1994
GS
361/*
362=for apidoc mg_clear
363
364Clear something magical that the SV represents. See C<sv_magic>.
365
366=cut
367*/
368
79072805 369int
864dbfa3 370Perl_mg_clear(pTHX_ SV *sv)
79072805 371{
35a4481c 372 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 373 MAGIC* mg;
8ac77ac9 374 MAGIC *nextmg;
463ee0b2 375
7918f24d
NC
376 PERL_ARGS_ASSERT_MG_CLEAR;
377
455ece5e 378 save_magic(mgs_ix, sv);
463ee0b2 379
8ac77ac9 380 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
35a4481c 381 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 382 /* omit GSKIP -- never set here */
727405f8 383
8ac77ac9
NC
384 nextmg = mg->mg_moremagic; /* it may delete itself */
385
2b260de0 386 if (vtbl && vtbl->svt_clear)
16c91539 387 vtbl->svt_clear(aTHX_ sv, mg);
79072805 388 }
463ee0b2 389
8772537c 390 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
391 return 0;
392}
393
ed624ca8 394static MAGIC*
39de7f53
FR
395S_mg_findext_flags(pTHX_ const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
396{
397 PERL_UNUSED_CONTEXT;
398
399 assert(flags <= 1);
400
401 if (sv) {
402 MAGIC *mg;
403
404 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
405 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
406 return mg;
407 }
408 }
409 }
410
411 return NULL;
412}
413
954c1994
GS
414/*
415=for apidoc mg_find
416
417Finds the magic pointer for type matching the SV. See C<sv_magic>.
418
419=cut
420*/
421
93a17b20 422MAGIC*
35a4481c 423Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 424{
39de7f53
FR
425 return S_mg_findext_flags(aTHX_ sv, type, NULL, 0);
426}
427
428/*
429=for apidoc mg_findext
430
431Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
432C<sv_magicext>.
433
434=cut
435*/
436
437MAGIC*
438Perl_mg_findext(pTHX_ const SV *sv, int type, const MGVTBL *vtbl)
439{
440 return S_mg_findext_flags(aTHX_ sv, type, vtbl, 1);
93a17b20
LW
441}
442
954c1994
GS
443/*
444=for apidoc mg_copy
445
446Copies the magic from one SV to another. See C<sv_magic>.
447
448=cut
449*/
450
79072805 451int
864dbfa3 452Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 453{
463ee0b2 454 int count = 0;
79072805 455 MAGIC* mg;
7918f24d
NC
456
457 PERL_ARGS_ASSERT_MG_COPY;
458
463ee0b2 459 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 460 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93 461 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
16c91539 462 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
68795e93 463 }
823a54a3
AL
464 else {
465 const char type = mg->mg_type;
1e73acc8 466 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
467 sv_magic(nsv,
468 (type == PERL_MAGIC_tied)
469 ? SvTIED_obj(sv, mg)
470 : (type == PERL_MAGIC_regdata && mg->mg_obj)
471 ? sv
472 : mg->mg_obj,
473 toLOWER(type), key, klen);
474 count++;
475 }
79072805 476 }
79072805 477 }
463ee0b2 478 return count;
79072805
LW
479}
480
954c1994 481/*
0cbee0a4
DM
482=for apidoc mg_localize
483
9711599e
CS
484Copy some of the magic from an existing SV to new localized version of that
485SV. Container magic (eg %ENV, $1, tie) gets copied, value magic doesn't (eg
486taint, pos).
487
af7df257 488If setmagic is false then no set magic will be called on the new (empty) SV.
9711599e
CS
489This typically means that assignment will soon follow (e.g. 'local $x = $y'),
490and that will handle the magic.
0cbee0a4
DM
491
492=cut
493*/
494
495void
af7df257 496Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
0cbee0a4 497{
97aff369 498 dVAR;
0cbee0a4 499 MAGIC *mg;
7918f24d
NC
500
501 PERL_ARGS_ASSERT_MG_LOCALIZE;
502
658a9f31
JD
503 if (nsv == DEFSV)
504 return;
505
0cbee0a4 506 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 507 const MGVTBL* const vtbl = mg->mg_virtual;
e0a73de4 508 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
0cbee0a4 509 continue;
0cbee0a4 510
a5063e7c 511 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
16c91539 512 (void)vtbl->svt_local(aTHX_ nsv, mg);
a5063e7c 513 else
0cbee0a4
DM
514 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
515 mg->mg_ptr, mg->mg_len);
a5063e7c 516
0cbee0a4 517 /* container types should remain read-only across localization */
b2b95e4c 518 if (!SvIsCOW(sv)) SvFLAGS(nsv) |= SvREADONLY(sv);
0cbee0a4
DM
519 }
520
521 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
522 SvFLAGS(nsv) |= SvMAGICAL(sv);
af7df257 523 if (setmagic) {
9711599e
CS
524 PL_localizing = 1;
525 SvSETMAGIC(nsv);
526 PL_localizing = 0;
527 }
0cbee0a4
DM
528 }
529}
530
d9088386
Z
531#define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
532static void
533S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
534{
535 const MGVTBL* const vtbl = mg->mg_virtual;
536 if (vtbl && vtbl->svt_free)
537 vtbl->svt_free(aTHX_ sv, mg);
538 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
539 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
540 Safefree(mg->mg_ptr);
541 else if (mg->mg_len == HEf_SVKEY)
542 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
543 }
544 if (mg->mg_flags & MGf_REFCOUNTED)
545 SvREFCNT_dec(mg->mg_obj);
546 Safefree(mg);
547}
548
0cbee0a4 549/*
954c1994
GS
550=for apidoc mg_free
551
552Free any magic storage used by the SV. See C<sv_magic>.
553
554=cut
555*/
556
79072805 557int
864dbfa3 558Perl_mg_free(pTHX_ SV *sv)
79072805
LW
559{
560 MAGIC* mg;
561 MAGIC* moremagic;
7918f24d
NC
562
563 PERL_ARGS_ASSERT_MG_FREE;
564
79072805 565 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
79072805 566 moremagic = mg->mg_moremagic;
d9088386 567 mg_free_struct(sv, mg);
c826f41b 568 SvMAGIC_set(sv, moremagic);
79072805 569 }
b162af07 570 SvMAGIC_set(sv, NULL);
68f8932e 571 SvMAGICAL_off(sv);
79072805
LW
572 return 0;
573}
574
d9088386
Z
575/*
576=for apidoc Am|void|mg_free_type|SV *sv|int how
577
578Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
579
580=cut
581*/
582
583void
584Perl_mg_free_type(pTHX_ SV *sv, int how)
585{
586 MAGIC *mg, *prevmg, *moremg;
587 PERL_ARGS_ASSERT_MG_FREE_TYPE;
588 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
589 MAGIC *newhead;
590 moremg = mg->mg_moremagic;
591 if (mg->mg_type == how) {
592 /* temporarily move to the head of the magic chain, in case
593 custom free code relies on this historical aspect of mg_free */
594 if (prevmg) {
595 prevmg->mg_moremagic = moremg;
596 mg->mg_moremagic = SvMAGIC(sv);
597 SvMAGIC_set(sv, mg);
598 }
599 newhead = mg->mg_moremagic;
600 mg_free_struct(sv, mg);
601 SvMAGIC_set(sv, newhead);
602 mg = prevmg;
603 }
604 }
605 mg_magical(sv);
606}
607
79072805 608#include <signal.h>
79072805 609
942e002e 610U32
864dbfa3 611Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 612{
97aff369 613 dVAR;
8772537c 614 PERL_UNUSED_ARG(sv);
6cef1e77 615
7918f24d
NC
616 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
617
0bd48802 618 if (PL_curpm) {
eb578fdb 619 const REGEXP * const rx = PM_GETRE(PL_curpm);
0bd48802 620 if (rx) {
a678b0e4
YO
621 if (mg->mg_obj) { /* @+ */
622 /* return the number possible */
07bc277f 623 return RX_NPARENS(rx);
a678b0e4 624 } else { /* @- */
07bc277f 625 I32 paren = RX_LASTPAREN(rx);
a678b0e4
YO
626
627 /* return the last filled */
f46c4081 628 while ( paren >= 0
07bc277f
NC
629 && (RX_OFFS(rx)[paren].start == -1
630 || RX_OFFS(rx)[paren].end == -1) )
f46c4081 631 paren--;
a678b0e4
YO
632 return (U32)paren;
633 }
0bd48802 634 }
8f580fb8 635 }
ac27b0f5 636
942e002e 637 return (U32)-1;
6cef1e77
IZ
638}
639
640int
864dbfa3 641Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 642{
97aff369 643 dVAR;
7918f24d
NC
644
645 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
646
0bd48802 647 if (PL_curpm) {
eb578fdb 648 const REGEXP * const rx = PM_GETRE(PL_curpm);
0bd48802 649 if (rx) {
eb578fdb
KW
650 const I32 paren = mg->mg_len;
651 I32 s;
652 I32 t;
0bd48802
AL
653 if (paren < 0)
654 return 0;
07bc277f
NC
655 if (paren <= (I32)RX_NPARENS(rx) &&
656 (s = RX_OFFS(rx)[paren].start) != -1 &&
657 (t = RX_OFFS(rx)[paren].end) != -1)
0bd48802 658 {
eb578fdb 659 I32 i;
0bd48802
AL
660 if (mg->mg_obj) /* @+ */
661 i = t;
662 else /* @- */
663 i = s;
664
665 if (i > 0 && RX_MATCH_UTF8(rx)) {
07bc277f 666 const char * const b = RX_SUBBEG(rx);
0bd48802 667 if (b)
f5a63d97 668 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 669 }
727405f8 670
0bd48802 671 sv_setiv(sv, i);
1aa99e6b 672 }
0bd48802 673 }
6cef1e77
IZ
674 }
675 return 0;
676}
677
e4b89193 678int
a29d06ed
MG
679Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
680{
7918f24d 681 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
d4c19fe8
AL
682 PERL_UNUSED_ARG(sv);
683 PERL_UNUSED_ARG(mg);
6ad8f254 684 Perl_croak_no_modify(aTHX);
0dbb1585 685 NORETURN_FUNCTION_END;
a29d06ed
MG
686}
687
93a17b20 688U32
864dbfa3 689Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 690{
97aff369 691 dVAR;
eb578fdb
KW
692 I32 paren;
693 I32 i;
694 const REGEXP * rx;
2fdbfb4d 695 const char * const remaining = mg->mg_ptr + 1;
93a17b20 696
7918f24d
NC
697 PERL_ARGS_ASSERT_MAGIC_LEN;
698
93a17b20 699 switch (*mg->mg_ptr) {
2fdbfb4d
AB
700 case '\020':
701 if (*remaining == '\0') { /* ^P */
702 break;
703 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
704 goto do_prematch;
705 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
706 goto do_postmatch;
707 }
708 break;
709 case '\015': /* $^MATCH */
710 if (strEQ(remaining, "ATCH")) {
711 goto do_match;
712 } else {
713 break;
714 }
715 case '`':
716 do_prematch:
f1b875a0 717 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
718 goto maybegetparen;
719 case '\'':
720 do_postmatch:
f1b875a0 721 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
722 goto maybegetparen;
723 case '&':
724 do_match:
f1b875a0 725 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d 726 goto maybegetparen;
93a17b20 727 case '1': case '2': case '3': case '4':
2fdbfb4d
AB
728 case '5': case '6': case '7': case '8': case '9':
729 paren = atoi(mg->mg_ptr);
730 maybegetparen:
aaa362c4 731 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
732 getparen:
733 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 734
ffc61ed2 735 if (i < 0)
0844c848 736 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 737 return i;
2fdbfb4d 738 } else {
235bddc8 739 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 740 report_uninit(sv);
2fdbfb4d 741 return 0;
93a17b20 742 }
93a17b20 743 case '+':
aaa362c4 744 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 745 paren = RX_LASTPAREN(rx);
13f57bf8
CS
746 if (paren)
747 goto getparen;
93a17b20 748 }
748a9306 749 return 0;
a01268b5
JH
750 case '\016': /* ^N */
751 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 752 paren = RX_LASTCLOSEPAREN(rx);
a01268b5
JH
753 if (paren)
754 goto getparen;
755 }
756 return 0;
93a17b20
LW
757 }
758 magic_get(sv,mg);
2d8e6c8d 759 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 760 sv_2pv(sv, 0);
2d8e6c8d 761 }
93a17b20
LW
762 if (SvPOK(sv))
763 return SvCUR(sv);
764 return 0;
765}
766
ad3296c6 767#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
768 if (SvPOK(sv)) { \
769 STRLEN len = SvCUR(sv); \
770 char * const p = SvPVX(sv); \
8e6b4db6
PC
771 while (len > 0 && isSPACE(p[len-1])) \
772 --len; \
773 SvCUR_set(sv, len); \
774 p[len] = '\0'; \
775 } \
ad3296c6
SH
776} STMT_END
777
8b850bd5
NC
778void
779Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
780{
7918f24d
NC
781 PERL_ARGS_ASSERT_EMULATE_COP_IO;
782
8b850bd5
NC
783 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
784 sv_setsv(sv, &PL_sv_undef);
785 else {
786 sv_setpvs(sv, "");
787 SvUTF8_off(sv);
788 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
20439bc7 789 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
8b850bd5
NC
790 assert(value);
791 sv_catsv(sv, value);
792 }
793 sv_catpvs(sv, "\0");
794 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
20439bc7 795 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
8b850bd5
NC
796 assert(value);
797 sv_catsv(sv, value);
798 }
799 }
800}
801
25bbd826
CB
802#ifdef VMS
803#include <descrip.h>
804#include <starlet.h>
805#endif
806
79072805 807int
864dbfa3 808Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 809{
27da23d5 810 dVAR;
eb578fdb
KW
811 I32 paren;
812 const char *s = NULL;
813 REGEXP *rx;
823a54a3
AL
814 const char * const remaining = mg->mg_ptr + 1;
815 const char nextchar = *remaining;
79072805 816
7918f24d
NC
817 PERL_ARGS_ASSERT_MAGIC_GET;
818
79072805 819 switch (*mg->mg_ptr) {
748a9306 820 case '\001': /* ^A */
f2da823f
FC
821 if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget);
822 else sv_setsv(sv, &PL_sv_undef);
125b9982
NT
823 if (SvTAINTED(PL_bodytarget))
824 SvTAINTED_on(sv);
748a9306 825 break;
e5218da5 826 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 827 if (nextchar == '\0') {
e5218da5
GA
828 sv_setiv(sv, (IV)PL_minus_c);
829 }
823a54a3 830 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
831 sv_setiv(sv, (IV)STATUS_NATIVE);
832 }
49460fe6
NIS
833 break;
834
79072805 835 case '\004': /* ^D */
aea4f609 836 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 837 break;
28f23441 838 case '\005': /* ^E */
823a54a3 839 if (nextchar == '\0') {
e37778c2 840#if defined(VMS)
0a378802 841 {
0a378802
JH
842 char msg[255];
843 $DESCRIPTOR(msgdsc,msg);
844 sv_setnv(sv,(NV) vaxc$errno);
845 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
846 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
847 else
76f68e9b 848 sv_setpvs(sv,"");
0a378802 849 }
4b645107 850#elif defined(OS2)
0a378802
JH
851 if (!(_emx_env & 0x200)) { /* Under DOS */
852 sv_setnv(sv, (NV)errno);
853 sv_setpv(sv, errno ? Strerror(errno) : "");
854 } else {
855 if (errno != errno_isOS2) {
823a54a3 856 const int tmp = _syserrno();
0a378802
JH
857 if (tmp) /* 2nd call to _syserrno() makes it 0 */
858 Perl_rc = tmp;
859 }
860 sv_setnv(sv, (NV)Perl_rc);
861 sv_setpv(sv, os2error(Perl_rc));
862 }
4b645107 863#elif defined(WIN32)
0a378802 864 {
d4c19fe8 865 const DWORD dwErr = GetLastError();
0a378802 866 sv_setnv(sv, (NV)dwErr);
823a54a3 867 if (dwErr) {
0a378802
JH
868 PerlProc_GetOSError(sv, dwErr);
869 }
870 else
76f68e9b 871 sv_setpvs(sv, "");
0a378802
JH
872 SetLastError(dwErr);
873 }
22fae026 874#else
f6c8f21d 875 {
4ee39169 876 dSAVE_ERRNO;
f6c8f21d 877 sv_setnv(sv, (NV)errno);
666ea192 878 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 879 RESTORE_ERRNO;
f6c8f21d 880 }
28f23441 881#endif
ad3296c6 882 SvRTRIM(sv);
0a378802
JH
883 SvNOK_on(sv); /* what a wonderful hack! */
884 }
823a54a3 885 else if (strEQ(remaining, "NCODING"))
0a378802
JH
886 sv_setsv(sv, PL_encoding);
887 break;
79072805 888 case '\006': /* ^F */
3280af22 889 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 890 break;
9ebf26ad
FR
891 case '\007': /* ^GLOBAL_PHASE */
892 if (strEQ(remaining, "LOBAL_PHASE")) {
893 sv_setpvn(sv, PL_phase_names[PL_phase],
894 strlen(PL_phase_names[PL_phase]));
895 }
896 break;
a0d0e21e 897 case '\010': /* ^H */
3280af22 898 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 899 break;
9d116dd7 900 case '\011': /* ^I */ /* NOT \t in EBCDIC */
120f7abe 901 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
79072805 902 break;
ac27b0f5 903 case '\017': /* ^O & ^OPEN */
823a54a3 904 if (nextchar == '\0') {
ac27b0f5 905 sv_setpv(sv, PL_osname);
3511154c
DM
906 SvTAINTED_off(sv);
907 }
823a54a3 908 else if (strEQ(remaining, "PEN")) {
8b850bd5 909 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 910 }
28f23441 911 break;
9ebf26ad 912 case '\020':
cde0cee5
YO
913 if (nextchar == '\0') { /* ^P */
914 sv_setiv(sv, (IV)PL_perldb);
915 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
916 goto do_prematch_fetch;
917 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
918 goto do_postmatch_fetch;
919 }
79072805 920 break;
fb73857a 921 case '\023': /* ^S */
823a54a3 922 if (nextchar == '\0') {
bc177e6b 923 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 924 SvOK_off(sv);
3280af22 925 else if (PL_in_eval)
6dc8a9e4 926 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
927 else
928 sv_setiv(sv, 0);
d58bf5aa 929 }
fb73857a 930 break;
79072805 931 case '\024': /* ^T */
823a54a3 932 if (nextchar == '\0') {
88e89b8a 933#ifdef BIG_TIME
7c36658b 934 sv_setnv(sv, PL_basetime);
88e89b8a 935#else
7c36658b 936 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 937#endif
7c36658b 938 }
823a54a3 939 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
940 sv_setiv(sv, PL_tainting
941 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
942 : 0);
7c36658b 943 break;
e07ea26a 944 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 945 if (strEQ(remaining, "NICODE"))
a05d7ebb 946 sv_setuv(sv, (UV) PL_unicode);
823a54a3 947 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 948 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
949 else if (strEQ(remaining, "TF8CACHE"))
950 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
951 break;
952 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 953 if (nextchar == '\0')
4438c4b7 954 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 955 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 956 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 957 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
958 }
959 else if (PL_compiling.cop_warnings == pWARN_STD) {
7e4f0450
FC
960 sv_setsv(sv, &PL_sv_undef);
961 break;
013b78e8 962 }
d3a7d8c7 963 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
964 /* Get the bit mask for $warnings::Bits{all}, because
965 * it could have been extended by warnings::register */
4bac9ae4
CS
966 HV * const bits = get_hv("warnings::Bits", 0);
967 SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL;
968 if (bits_all)
969 sv_copypv(sv, *bits_all);
970 else
971 sv_setpvn(sv, WARN_ALLstring, WARNsize);
ac27b0f5 972 }
4438c4b7 973 else {
72dc9ed5
NC
974 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
975 *PL_compiling.cop_warnings);
ac27b0f5 976 }
4438c4b7 977 }
79072805 978 break;
cde0cee5
YO
979 case '\015': /* $^MATCH */
980 if (strEQ(remaining, "ATCH")) {
79072805
LW
981 case '1': case '2': case '3': case '4':
982 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
983 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
984 /*
159b6efe 985 * Pre-threads, this was paren = atoi(GvENAME((const GV *)mg->mg_obj));
cde0cee5
YO
986 * XXX Does the new way break anything?
987 */
988 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 989 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO
990 break;
991 }
992 sv_setsv(sv,&PL_sv_undef);
79072805
LW
993 }
994 break;
995 case '+':
aaa362c4 996 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC
997 if (RX_LASTPAREN(rx)) {
998 CALLREG_NUMBUF_FETCH(rx,RX_LASTPAREN(rx),sv);
44a2ac75
YO
999 break;
1000 }
79072805 1001 }
3280af22 1002 sv_setsv(sv,&PL_sv_undef);
79072805 1003 break;
a01268b5
JH
1004 case '\016': /* ^N */
1005 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC
1006 if (RX_LASTCLOSEPAREN(rx)) {
1007 CALLREG_NUMBUF_FETCH(rx,RX_LASTCLOSEPAREN(rx),sv);
44a2ac75
YO
1008 break;
1009 }
1010
a01268b5
JH
1011 }
1012 sv_setsv(sv,&PL_sv_undef);
1013 break;
79072805 1014 case '`':
cde0cee5 1015 do_prematch_fetch:
aaa362c4 1016 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 1017 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 1018 break;
79072805 1019 }
3280af22 1020 sv_setsv(sv,&PL_sv_undef);
79072805
LW
1021 break;
1022 case '\'':
cde0cee5 1023 do_postmatch_fetch:
aaa362c4 1024 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 1025 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 1026 break;
79072805 1027 }
3280af22 1028 sv_setsv(sv,&PL_sv_undef);
79072805
LW
1029 break;
1030 case '.':
3280af22 1031 if (GvIO(PL_last_in_gv)) {
357c8808 1032 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 1033 }
79072805
LW
1034 break;
1035 case '?':
809a5acc 1036 {
809a5acc 1037 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 1038#ifdef COMPLEX_STATUS
41cb7b2b 1039 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
1040 LvTARGOFF(sv) = PL_statusvalue;
1041 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 1042#endif
809a5acc 1043 }
79072805
LW
1044 break;
1045 case '^':
acbe1b9d 1046 if (GvIOp(PL_defoutgv))
099be4f1 1047 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
1048 if (s)
1049 sv_setpv(sv,s);
1050 else {
3280af22 1051 sv_setpv(sv,GvENAME(PL_defoutgv));
cb421d5e 1052 sv_catpvs(sv,"_TOP");
79072805
LW
1053 }
1054 break;
1055 case '~':
acbe1b9d 1056 if (GvIOp(PL_defoutgv))
0daa599b 1057 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 1058 if (!s)
3280af22 1059 s = GvENAME(PL_defoutgv);
79072805
LW
1060 sv_setpv(sv,s);
1061 break;
79072805 1062 case '=':
099be4f1 1063 if (GvIO(PL_defoutgv))
0daa599b 1064 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
1065 break;
1066 case '-':
099be4f1 1067 if (GvIO(PL_defoutgv))
0daa599b 1068 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
1069 break;
1070 case '%':
099be4f1 1071 if (GvIO(PL_defoutgv))
0daa599b 1072 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 1073 break;
79072805
LW
1074 case ':':
1075 break;
1076 case '/':
1077 break;
1078 case '[':
e1dccc0d 1079 sv_setiv(sv, 0);
79072805
LW
1080 break;
1081 case '|':
099be4f1 1082 if (GvIO(PL_defoutgv))
0daa599b 1083 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805 1084 break;
79072805 1085 case '\\':
b2ce0fda 1086 if (PL_ors_sv)
f28098ff 1087 sv_copypv(sv, PL_ors_sv);
4bac9ae4
CS
1088 else
1089 sv_setsv(sv, &PL_sv_undef);
79072805 1090 break;
0e219455 1091 case '$': /* $$ */
9cdac2a2
FC
1092 {
1093 IV const pid = (IV)PerlProc_getpid();
19db9fb7 1094 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
9cdac2a2
FC
1095 /* never set manually, or at least not since last fork */
1096 sv_setiv(sv, pid);
19db9fb7
Z
1097 /* never unsafe, even if reading in a tainted expression */
1098 SvTAINTED_off(sv);
1099 }
9cdac2a2
FC
1100 /* else a value has been assigned manually, so do nothing */
1101 }
0e219455
MM
1102 break;
1103
79072805 1104 case '!':
666d8aa2
CB
1105 {
1106 dSAVE_ERRNO;
a5f75d66 1107#ifdef VMS
65202027 1108 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
a5f75d66 1109#else
65202027 1110 sv_setnv(sv, (NV)errno);
666d8aa2 1111#endif
88e89b8a 1112#ifdef OS2
ed344e4f
IZ
1113 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1114 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 1115 else
a5f75d66 1116#endif
666ea192 1117 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 1118 RESTORE_ERRNO;
88e89b8a 1119 }
666d8aa2 1120
ad3296c6 1121 SvRTRIM(sv);
946ec16e 1122 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1123 break;
1124 case '<':
985213f2 1125 sv_setiv(sv, (IV)PerlProc_getuid());
79072805
LW
1126 break;
1127 case '>':
985213f2 1128 sv_setiv(sv, (IV)PerlProc_geteuid());
79072805
LW
1129 break;
1130 case '(':
985213f2 1131 sv_setiv(sv, (IV)PerlProc_getgid());
79072805
LW
1132 goto add_groups;
1133 case ')':
985213f2 1134 sv_setiv(sv, (IV)PerlProc_getegid());
79072805 1135 add_groups:
79072805 1136#ifdef HAS_GETGROUPS
79072805 1137 {
57d7c65e 1138 Groups_t *gary = NULL;
fb45abb2 1139 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1140 Newx(gary, num_groups, Groups_t);
1141 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1142 for (i = 0; i < num_groups; i++)
1143 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1144 Safefree(gary);
79072805 1145 }
155aba94 1146 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1147#endif
79072805 1148 break;
79072805
LW
1149 case '0':
1150 break;
1151 }
a0d0e21e 1152 return 0;
79072805
LW
1153}
1154
1155int
864dbfa3 1156Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1157{
8772537c 1158 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 1159
7918f24d
NC
1160 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1161
79072805 1162 if (uf && uf->uf_val)
24f81a43 1163 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1164 return 0;
1165}
1166
1167int
864dbfa3 1168Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1169{
27da23d5 1170 dVAR;
9ae3433d 1171 STRLEN len = 0, klen;
12033064 1172 const char * const key = MgPV_const(mg,klen);
613c63b4 1173 const char *s = NULL;
1e422769 1174
7918f24d
NC
1175 PERL_ARGS_ASSERT_MAGIC_SETENV;
1176
613c63b4 1177 SvGETMAGIC(sv);
12033064 1178 if (SvOK(sv)) {
613c63b4
CS
1179 /* defined environment variables are byte strings; unfortunately
1180 there is no SvPVbyte_force_nomg(), so we must do this piecewise */
1181 (void)SvPV_force_nomg_nolen(sv);
1182 sv_utf8_downgrade(sv, /* fail_ok */ TRUE);
1183 if (SvUTF8(sv)) {
1184 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv");
1185 SvUTF8_off(sv);
1186 }
1187 s = SvPVX(sv);
1188 len = SvCUR(sv);
12033064
CS
1189 }
1190 my_setenv(key, s); /* does the deed */
1191
a0d0e21e
LW
1192#ifdef DYNAMIC_ENV_FETCH
1193 /* We just undefd an environment var. Is a replacement */
1194 /* waiting in the wings? */
1195 if (!len) {
6bd66ee9 1196 SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE);
fabdb6c0 1197 if (valp)
4ab59fcc 1198 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1199 }
1200#endif
1e422769 1201
39e571d4 1202#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1203 /* And you'll never guess what the dog had */
1204 /* in its mouth... */
3280af22 1205 if (PL_tainting) {
1e422769
PP
1206 MgTAINTEDDIR_off(mg);
1207#ifdef VMS
6bd66ee9 1208 if (s && klen == 8 && strEQ(key, "DCL$PATH")) {
b8ffc8df 1209 char pathbuf[256], eltbuf[256], *cp, *elt;
1e422769
PP
1210 int i = 0, j = 0;
1211
6fca0082 1212 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1213 elt = eltbuf;
1e422769
PP
1214 do { /* DCL$PATH may be a search list */
1215 while (1) { /* as may dev portion of any element */
1216 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1217 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1218 cando_by_name(S_IWUSR,0,elt) ) {
1219 MgTAINTEDDIR_on(mg);
1220 return 0;
1221 }
1222 }
bd61b366 1223 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1224 *cp = '\0';
1225 if (my_trnlnm(elt, eltbuf, j++))
1226 elt = eltbuf;
1227 else
1228 break;
1229 }
1230 j = 0;
1231 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1232 }
1233#endif /* VMS */
12033064 1234 if (s && klen == 4 && strEQ(key,"PATH")) {
8772537c 1235 const char * const strend = s + len;
463ee0b2
LW
1236
1237 while (s < strend) {
96827780 1238 char tmpbuf[256];
c623ac67 1239 Stat_t st;
5f74f29c 1240 I32 i;
f5a63d97
AL
1241#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1242 const char path_sep = '|';
1243#else
1244 const char path_sep = ':';
1245#endif
96827780 1246 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1247 s, strend, path_sep, &i);
463ee0b2 1248 s++;
bb7a0f54 1249 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1250#ifdef VMS
1251 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1252#else
1253 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1254#endif
c6ed36e1 1255 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1256 MgTAINTEDDIR_on(mg);
1e422769
PP
1257 return 0;
1258 }
463ee0b2 1259 }
79072805
LW
1260 }
1261 }
39e571d4 1262#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1263
79072805
LW
1264 return 0;
1265}
1266
1267int
864dbfa3 1268Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1269{
7918f24d 1270 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
8772537c 1271 PERL_UNUSED_ARG(sv);
bd61b366 1272 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1273 return 0;
1274}
1275
88e89b8a 1276int
864dbfa3 1277Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1278{
97aff369 1279 dVAR;
7918f24d 1280 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
65e66c80 1281 PERL_UNUSED_ARG(mg);
b0269e46 1282#if defined(VMS)
cea2e8a9 1283 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1284#else
3280af22 1285 if (PL_localizing) {
fb73857a 1286 HE* entry;
b0269e46 1287 my_clearenv();
85fbaab2
NC
1288 hv_iterinit(MUTABLE_HV(sv));
1289 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
fb73857a
PP
1290 I32 keylen;
1291 my_setenv(hv_iterkey(entry, &keylen),
85fbaab2 1292 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
fb73857a
PP
1293 }
1294 }
1295#endif
1296 return 0;
1297}
1298
1299int
864dbfa3 1300Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1301{
27da23d5 1302 dVAR;
7918f24d 1303 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
8772537c
AL
1304 PERL_UNUSED_ARG(sv);
1305 PERL_UNUSED_ARG(mg);
b0269e46
AB
1306#if defined(VMS)
1307 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1308#else
1309 my_clearenv();
1310#endif
3e3baf6d 1311 return 0;
66b1d557
HM
1312}
1313
64ca3a65 1314#ifndef PERL_MICRO
2d4fcd5e
AJ
1315#ifdef HAS_SIGPROCMASK
1316static void
1317restore_sigmask(pTHX_ SV *save_sv)
1318{
0bd48802 1319 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1320 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1321}
1322#endif
66b1d557 1323int
864dbfa3 1324Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1325{
97aff369 1326 dVAR;
88e89b8a 1327 /* Are we fetching a signal entry? */
708854f2 1328 int i = (I16)mg->mg_private;
7918f24d
NC
1329
1330 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1331
708854f2 1332 if (!i) {
84c7b88c
BF
1333 STRLEN siglen;
1334 const char * sig = MgPV_const(mg, siglen);
1335 mg->mg_private = i = whichsig_pvn(sig, siglen);
708854f2
NC
1336 }
1337
e02bfb16 1338 if (i > 0) {
22c35a8c
GS
1339 if(PL_psig_ptr[i])
1340 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1341 else {
46da273f 1342 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1343#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1344 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1345 sigstate = SIG_IGN;
2e34cc90
CL
1346#endif
1347#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1348 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1349 sigstate = SIG_DFL;
85b332e2 1350#endif
88e89b8a 1351 /* cache state so we don't fetch it again */
8aad04aa 1352 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1353 sv_setpvs(sv,"IGNORE");
88e89b8a 1354 else
3280af22 1355 sv_setsv(sv,&PL_sv_undef);
46da273f 1356 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1357 SvTEMP_off(sv);
1358 }
1359 }
1360 return 0;
1361}
1362int
864dbfa3 1363Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1364{
7918f24d 1365 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
179c85a2 1366
38a124f0 1367 magic_setsig(NULL, mg);
179c85a2 1368 return sv_unmagic(sv, mg->mg_type);
88e89b8a 1369}
3d37d572 1370
0a8e0eff 1371Signal_t
8aad04aa 1372#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1373Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 1374#else
0a8e0eff 1375Perl_csighandler(int sig)
8aad04aa 1376#endif
0a8e0eff 1377{
1018e26f
NIS
1378#ifdef PERL_GET_SIG_CONTEXT
1379 dTHXa(PERL_GET_SIG_CONTEXT);
1380#else
85b332e2
CL
1381 dTHX;
1382#endif
23ada85b 1383#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1384 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1385 if (PL_sig_ignoring[sig]) return;
85b332e2 1386#endif
2e34cc90 1387#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1388 if (PL_sig_defaulting[sig])
2e34cc90
CL
1389#ifdef KILL_BY_SIGPRC
1390 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1391#else
1392 exit(1);
1393#endif
1394#endif
406878dd 1395 if (
853d2c32
RGS
1396#ifdef SIGILL
1397 sig == SIGILL ||
1398#endif
1399#ifdef SIGBUS
1400 sig == SIGBUS ||
1401#endif
1402#ifdef SIGSEGV
1403 sig == SIGSEGV ||
1404#endif
1405 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3 1406 /* Call the perl level handler now--
31c91b43 1407 * with risk we may be in malloc() or being destructed etc. */
6e324d09 1408#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1409 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1410#else
1411 (*PL_sighandlerp)(sig);
92807b6d 1412#endif
406878dd 1413 else {
31c91b43 1414 if (!PL_psig_pend) return;
406878dd
GA
1415 /* Set a flag to say this signal is pending, that is awaiting delivery after
1416 * the current Perl opcode completes */
1417 PL_psig_pend[sig]++;
1418
1419#ifndef SIG_PENDING_DIE_COUNT
1420# define SIG_PENDING_DIE_COUNT 120
1421#endif
fe13d51d 1422 /* Add one to say _a_ signal is pending */
406878dd
GA
1423 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1424 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1425 (unsigned long)SIG_PENDING_DIE_COUNT);
1426 }
0a8e0eff
NIS
1427}
1428
2e34cc90
CL
1429#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1430void
1431Perl_csighandler_init(void)
1432{
1433 int sig;
27da23d5 1434 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1435
1436 for (sig = 1; sig < SIG_SIZE; sig++) {
1437#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1438 dTHX;
27da23d5 1439 PL_sig_defaulting[sig] = 1;
5c1546dc 1440 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1441#endif
1442#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1443 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1444#endif
1445 }
27da23d5 1446 PL_sig_handlers_initted = 1;
2e34cc90
CL
1447}
1448#endif
1449
7fe50b8b
LT
1450#if defined HAS_SIGPROCMASK
1451static void
1452unblock_sigmask(pTHX_ void* newset)
1453{
1454 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1455}
1456#endif
1457
0a8e0eff
NIS
1458void
1459Perl_despatch_signals(pTHX)
1460{
97aff369 1461 dVAR;
0a8e0eff
NIS
1462 int sig;
1463 PL_sig_pending = 0;
1464 for (sig = 1; sig < SIG_SIZE; sig++) {
1465 if (PL_psig_pend[sig]) {
d0166017 1466 dSAVE_ERRNO;
7fe50b8b 1467#ifdef HAS_SIGPROCMASK
55534442
LT
1468 /* From sigaction(2) (FreeBSD man page):
1469 * | Signal routines normally execute with the signal that
1470 * | caused their invocation blocked, but other signals may
1471 * | yet occur.
1472 * Emulation of this behavior (from within Perl) is enabled
1473 * using sigprocmask
1474 */
1475 int was_blocked;
1476 sigset_t newset, oldset;
1477
1478 sigemptyset(&newset);
1479 sigaddset(&newset, sig);
1480 sigprocmask(SIG_BLOCK, &newset, &oldset);
1481 was_blocked = sigismember(&oldset, sig);
7fe50b8b
LT
1482 if (!was_blocked) {
1483 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1484 ENTER;
1485 SAVEFREESV(save_sv);
1486 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1487 }
55534442 1488#endif
25da4428 1489 PL_psig_pend[sig] = 0;
6e324d09 1490#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1491 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1492#else
1493 (*PL_sighandlerp)(sig);
92807b6d 1494#endif
7fe50b8b 1495#ifdef HAS_SIGPROCMASK
55534442 1496 if (!was_blocked)
7fe50b8b 1497 LEAVE;
55534442 1498#endif
d0166017 1499 RESTORE_ERRNO;
0a8e0eff
NIS
1500 }
1501 }
1502}
1503
38a124f0 1504/* sv of NULL signifies that we're acting as magic_clearsig. */
85e6fe83 1505int
864dbfa3 1506Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1507{
27da23d5 1508 dVAR;
79072805 1509 I32 i;
cbbf8932 1510 SV** svp = NULL;
2d4fcd5e
AJ
1511 /* Need to be careful with SvREFCNT_dec(), because that can have side
1512 * effects (due to closures). We must make sure that the new disposition
1513 * is in place before it is called.
1514 */
cbbf8932 1515 SV* to_dec = NULL;
e72dc28c 1516 STRLEN len;
2d4fcd5e
AJ
1517#ifdef HAS_SIGPROCMASK
1518 sigset_t set, save;
1519 SV* save_sv;
1520#endif
eb578fdb 1521 const char *s = MgPV_const(mg,len);
7918f24d
NC
1522
1523 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1524
748a9306 1525 if (*s == '_') {
84c7b88c 1526 if (memEQs(s, len, "__DIE__"))
3280af22 1527 svp = &PL_diehook;
84c7b88c 1528 else if (memEQs(s, len, "__WARN__")
38a124f0
NC
1529 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1530 /* Merge the existing behaviours, which are as follows:
1531 magic_setsig, we always set svp to &PL_warnhook
1532 (hence we always change the warnings handler)
1533 For magic_clearsig, we don't change the warnings handler if it's
1534 set to the &PL_warnhook. */
3280af22 1535 svp = &PL_warnhook;
84c7b88c
BF
1536 } else if (sv) {
1537 SV *tmp = sv_newmortal();
1538 Perl_croak(aTHX_ "No such hook: %s",
1539 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1540 }
748a9306 1541 i = 0;
38a124f0 1542 if (svp && *svp) {
9289f461
RGS
1543 if (*svp != PERL_WARNHOOK_FATAL)
1544 to_dec = *svp;
cbbf8932 1545 *svp = NULL;
4633a7c4 1546 }
748a9306
LW
1547 }
1548 else {
708854f2
NC
1549 i = (I16)mg->mg_private;
1550 if (!i) {
84c7b88c 1551 i = whichsig_pvn(s, len); /* ...no, a brick */
58a26b12 1552 mg->mg_private = (U16)i;
708854f2 1553 }
86d86cad 1554 if (i <= 0) {
84c7b88c
BF
1555 if (sv) {
1556 SV *tmp = sv_newmortal();
1557 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1558 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1559 }
748a9306
LW
1560 return 0;
1561 }
2d4fcd5e
AJ
1562#ifdef HAS_SIGPROCMASK
1563 /* Avoid having the signal arrive at a bad time, if possible. */
1564 sigemptyset(&set);
1565 sigaddset(&set,i);
1566 sigprocmask(SIG_BLOCK, &set, &save);
1567 ENTER;
9ff8e806 1568 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ
1569 SAVEFREESV(save_sv);
1570 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1571#endif
1572 PERL_ASYNC_CHECK();
2e34cc90 1573#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1574 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1575#endif
23ada85b 1576#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1577 PL_sig_ignoring[i] = 0;
85b332e2 1578#endif
2e34cc90 1579#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1580 PL_sig_defaulting[i] = 0;
2e34cc90 1581#endif
2d4fcd5e 1582 to_dec = PL_psig_ptr[i];
38a124f0
NC
1583 if (sv) {
1584 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1585 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
79fd3822
NC
1586
1587 /* Signals don't change name during the program's execution, so once
1588 they're cached in the appropriate slot of PL_psig_name, they can
1589 stay there.
1590
1591 Ideally we'd find some way of making SVs at (C) compile time, or
1592 at least, doing most of the work. */
1593 if (!PL_psig_name[i]) {
1594 PL_psig_name[i] = newSVpvn(s, len);
1595 SvREADONLY_on(PL_psig_name[i]);
1596 }
38a124f0 1597 } else {
79fd3822 1598 SvREFCNT_dec(PL_psig_name[i]);
38a124f0
NC
1599 PL_psig_name[i] = NULL;
1600 PL_psig_ptr[i] = NULL;
1601 }
748a9306 1602 }
38a124f0 1603 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
2d4fcd5e 1604 if (i) {
5c1546dc 1605 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1606 }
748a9306 1607 else
b37c2d43 1608 *svp = SvREFCNT_inc_simple_NN(sv);
38a124f0 1609 } else {
9dfa190b
NC
1610 if (sv && SvOK(sv)) {
1611 s = SvPV_force(sv, len);
1612 } else {
1613 sv = NULL;
1614 }
84c7b88c 1615 if (sv && memEQs(s, len,"IGNORE")) {
9dfa190b 1616 if (i) {
23ada85b 1617#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
9dfa190b
NC
1618 PL_sig_ignoring[i] = 1;
1619 (void)rsignal(i, PL_csighandlerp);
85b332e2 1620#else
9dfa190b 1621 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1622#endif
9dfa190b 1623 }
2d4fcd5e 1624 }
84c7b88c 1625 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
9dfa190b 1626 if (i) {
2e34cc90 1627#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
9dfa190b
NC
1628 PL_sig_defaulting[i] = 1;
1629 (void)rsignal(i, PL_csighandlerp);
2e34cc90 1630#else
9dfa190b 1631 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1632#endif
9dfa190b
NC
1633 }
1634 }
1635 else {
1636 /*
1637 * We should warn if HINT_STRICT_REFS, but without
1638 * access to a known hint bit in a known OP, we can't
1639 * tell whether HINT_STRICT_REFS is in force or not.
1640 */
1641 if (!strchr(s,':') && !strchr(s,'\''))
1642 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1643 SV_GMAGIC);
1644 if (i)
1645 (void)rsignal(i, PL_csighandlerp);
1646 else
1647 *svp = SvREFCNT_inc_simple_NN(sv);
136e0459 1648 }
748a9306 1649 }
9dfa190b 1650
2d4fcd5e
AJ
1651#ifdef HAS_SIGPROCMASK
1652 if(i)
1653 LEAVE;
1654#endif
ef8d46e8 1655 SvREFCNT_dec(to_dec);
79072805
LW
1656 return 0;
1657}
64ca3a65 1658#endif /* !PERL_MICRO */
79072805
LW
1659
1660int
864dbfa3 1661Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1662{
97aff369 1663 dVAR;
7918f24d 1664 PERL_ARGS_ASSERT_MAGIC_SETISA;
8772537c 1665 PERL_UNUSED_ARG(sv);
e1a479c5 1666
89c14e2e 1667 /* Skip _isaelem because _isa will handle it shortly */
354b0578 1668 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
89c14e2e
BB
1669 return 0;
1670
0e446081 1671 return magic_clearisa(NULL, mg);
463ee0b2
LW
1672}
1673
0e446081 1674/* sv of NULL signifies that we're acting as magic_setisa. */
463ee0b2 1675int
52b45067
RD
1676Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1677{
1678 dVAR;
1679 HV* stash;
1680
7918f24d
NC
1681 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1682
52b45067 1683 /* Bail out if destruction is going on */
627364f1 1684 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
52b45067 1685
0e446081
NC
1686 if (sv)
1687 av_clear(MUTABLE_AV(sv));
52b45067 1688
6624142a
FC
1689 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1690 /* This occurs with setisa_elem magic, which calls this
1691 same function. */
1692 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1693
1694 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1695 SV **svp = AvARRAY((AV *)mg->mg_obj);
1696 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1697 while (items--) {
1698 stash = GvSTASH((GV *)*svp++);
1699 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1700 }
1701
1702 return 0;
1703 }
1704
52b45067 1705 stash = GvSTASH(
6624142a 1706 (const GV *)mg->mg_obj
52b45067
RD
1707 );
1708
00169e2c
FC
1709 /* The stash may have been detached from the symbol table, so check its
1710 name before doing anything. */
1711 if (stash && HvENAME_get(stash))
5562fa71 1712 mro_isa_changed_in(stash);
52b45067
RD
1713
1714 return 0;
1715}
1716
1717int
864dbfa3 1718Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1719{
85fbaab2 1720 HV * const hv = MUTABLE_HV(LvTARG(sv));
6ff81951 1721 I32 i = 0;
7918f24d
NC
1722
1723 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
8772537c 1724 PERL_UNUSED_ARG(mg);
7719e241 1725
6ff81951 1726 if (hv) {
497b47a8 1727 (void) hv_iterinit(hv);
ad64d0ec 1728 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1b95d04f 1729 i = HvUSEDKEYS(hv);
497b47a8
JH
1730 else {
1731 while (hv_iternext(hv))
1732 i++;
1733 }
6ff81951
GS
1734 }
1735
1736 sv_setiv(sv, (IV)i);
1737 return 0;
1738}
1739
1740int
864dbfa3 1741Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1742{
7918f24d 1743 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
8772537c 1744 PERL_UNUSED_ARG(mg);
946ec16e 1745 if (LvTARG(sv)) {
85fbaab2 1746 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
946ec16e
PP
1747 }
1748 return 0;
ac27b0f5 1749}
946ec16e 1750
efaf3674
DM
1751/*
1752=for apidoc magic_methcall
1753
1754Invoke a magic method (like FETCH).
1755
2baee27b
FC
1756C<sv> and C<mg> are the tied thingy and the tie magic.
1757
1758C<meth> is the name of the method to call.
1759
1760C<argc> is the number of args (in addition to $self) to pass to the method.
1761
1762The C<flags> can be:
1763
1764 G_DISCARD invoke method with G_DISCARD flag and don't
1765 return a value
1766 G_UNDEF_FILL fill the stack with argc pointers to
1767 PL_sv_undef
1768
1769The arguments themselves are any values following the C<flags> argument.
efaf3674
DM
1770
1771Returns the SV (if any) returned by the method, or NULL on failure.
1772
1773
1774=cut
1775*/
1776
1777SV*
c7a0c747 1778Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
046b0c7d 1779 U32 argc, ...)
a0d0e21e 1780{
97aff369 1781 dVAR;
a0d0e21e 1782 dSP;
efaf3674 1783 SV* ret = NULL;
463ee0b2 1784
7918f24d
NC
1785 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1786
efaf3674 1787 ENTER;
d1d7a15d
NC
1788
1789 if (flags & G_WRITING_TO_STDERR) {
1790 SAVETMPS;
1791
1792 save_re_context();
1793 SAVESPTR(PL_stderrgv);
1794 PL_stderrgv = NULL;
1795 }
1796
efaf3674 1797 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1798 PUSHMARK(SP);
efaf3674 1799
67549bd2
NC
1800 EXTEND(SP, argc+1);
1801 PUSHs(SvTIED_obj(sv, mg));
1802 if (flags & G_UNDEF_FILL) {
1803 while (argc--) {
efaf3674 1804 PUSHs(&PL_sv_undef);
93965878 1805 }
67549bd2 1806 } else if (argc > 0) {
046b0c7d
NC
1807 va_list args;
1808 va_start(args, argc);
1809
1810 do {
1811 SV *const sv = va_arg(args, SV *);
1812 PUSHs(sv);
1813 } while (--argc);
1814
1815 va_end(args);
88e89b8a 1816 }
463ee0b2 1817 PUTBACK;
efaf3674
DM
1818 if (flags & G_DISCARD) {
1819 call_method(meth, G_SCALAR|G_DISCARD);
1820 }
1821 else {
1822 if (call_method(meth, G_SCALAR))
1823 ret = *PL_stack_sp--;
1824 }
1825 POPSTACK;
d1d7a15d
NC
1826 if (flags & G_WRITING_TO_STDERR)
1827 FREETMPS;
efaf3674
DM
1828 LEAVE;
1829 return ret;
1830}
1831
1832
1833/* wrapper for magic_methcall that creates the first arg */
463ee0b2 1834
efaf3674 1835STATIC SV*
c7a0c747 1836S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
efaf3674
DM
1837 int n, SV *val)
1838{
1839 dVAR;
1840 SV* arg1 = NULL;
1841
1842 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1843
1844 if (mg->mg_ptr) {
1845 if (mg->mg_len >= 0) {
db4b3a1d 1846 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
efaf3674
DM
1847 }
1848 else if (mg->mg_len == HEf_SVKEY)
1849 arg1 = MUTABLE_SV(mg->mg_ptr);
1850 }
1851 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
db4b3a1d 1852 arg1 = newSViv((IV)(mg->mg_len));
efaf3674
DM
1853 sv_2mortal(arg1);
1854 }
1855 if (!arg1) {
046b0c7d 1856 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
efaf3674 1857 }
046b0c7d 1858 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
946ec16e
PP
1859}
1860
76e3520e 1861STATIC int
e1ec3a88 1862S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1863{
efaf3674
DM
1864 dVAR;
1865 SV* ret;
463ee0b2 1866
7918f24d
NC
1867 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1868
efaf3674
DM
1869 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1870 if (ret)
1871 sv_setsv(sv, ret);
a0d0e21e
LW
1872 return 0;
1873}
463ee0b2 1874
a0d0e21e 1875int
864dbfa3 1876Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1877{
7918f24d
NC
1878 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1879
fd69380d 1880 if (mg->mg_type == PERL_MAGIC_tiedelem)
a0d0e21e 1881 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1882 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1883 return 0;
1884}
1885
1886int
864dbfa3 1887Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1888{
efaf3674 1889 dVAR;
b112cff9
DM
1890 MAGIC *tmg;
1891 SV *val;
7918f24d
NC
1892
1893 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1894
b112cff9
DM
1895 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1896 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1897 * public flags indicate its value based on copying from $val. Doing
1898 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1899 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1900 * wrong if $val happened to be tainted, as sv hasn't got magic
1901 * enabled, even though taint magic is in the chain. In which case,
1902 * fake up a temporary tainted value (this is easier than temporarily
1903 * re-enabling magic on sv). */
1904
1905 if (PL_tainting && (tmg = mg_find(sv, PERL_MAGIC_taint))
1906 && (tmg->mg_len & 1))
1907 {
1908 val = sv_mortalcopy(sv);
1909 SvTAINTED_on(val);
1910 }
1911 else
1912 val = sv;
1913
efaf3674 1914 magic_methcall1(sv, mg, "STORE", G_DISCARD, 2, val);
463ee0b2
LW
1915 return 0;
1916}
1917
1918int
864dbfa3 1919Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1920{
7918f24d
NC
1921 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1922
4c13be3f 1923 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
a0d0e21e
LW
1924 return magic_methpack(sv,mg,"DELETE");
1925}
463ee0b2 1926
93965878
NIS
1927
1928U32
864dbfa3 1929Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1930{
efaf3674 1931 dVAR;
22846ab4 1932 I32 retval = 0;
efaf3674 1933 SV* retsv;
93965878 1934
7918f24d
NC
1935 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1936
efaf3674
DM
1937 retsv = magic_methcall1(sv, mg, "FETCHSIZE", 0, 1, NULL);
1938 if (retsv) {
1939 retval = SvIV(retsv)-1;
22846ab4
AB
1940 if (retval < -1)
1941 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1942 }
22846ab4 1943 return (U32) retval;
93965878
NIS
1944}
1945
cea2e8a9
GS
1946int
1947Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1948{
efaf3674 1949 dVAR;
463ee0b2 1950
7918f24d
NC
1951 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1952
046b0c7d 1953 Perl_magic_methcall(aTHX_ sv, mg, "CLEAR", G_DISCARD, 0);
463ee0b2
LW
1954 return 0;
1955}
1956
1957int
864dbfa3 1958Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1959{
efaf3674
DM
1960 dVAR;
1961 SV* ret;
463ee0b2 1962
7918f24d
NC
1963 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1964
046b0c7d
NC
1965 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, "NEXTKEY", 0, 1, key)
1966 : Perl_magic_methcall(aTHX_ sv, mg, "FIRSTKEY", 0, 0);
efaf3674
DM
1967 if (ret)
1968 sv_setsv(key,ret);
79072805
LW
1969 return 0;
1970}
1971
1972int
1146e912 1973Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e 1974{
7918f24d
NC
1975 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1976
a0d0e21e 1977 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1978}
a0d0e21e 1979
a3bcc51e
TP
1980SV *
1981Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1982{
efaf3674 1983 dVAR;
5fcbf73d 1984 SV *retval;
ad64d0ec
NC
1985 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1986 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
a3bcc51e 1987
7918f24d
NC
1988 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1989
a3bcc51e
TP
1990 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1991 SV *key;
bfcb3514 1992 if (HvEITER_get(hv))
a3bcc51e
TP
1993 /* we are in an iteration so the hash cannot be empty */
1994 return &PL_sv_yes;
1995 /* no xhv_eiter so now use FIRSTKEY */
1996 key = sv_newmortal();
ad64d0ec 1997 magic_nextpack(MUTABLE_SV(hv), mg, key);
bfcb3514 1998 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1999 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
2000 }
2001
2002 /* there is a SCALAR method that we can call */
046b0c7d 2003 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, "SCALAR", 0, 0);
efaf3674 2004 if (!retval)
5fcbf73d 2005 retval = &PL_sv_undef;
a3bcc51e
TP
2006 return retval;
2007}
2008
a0d0e21e 2009int
864dbfa3 2010Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 2011{
97aff369 2012 dVAR;
8772537c
AL
2013 GV * const gv = PL_DBline;
2014 const I32 i = SvTRUE(sv);
2015 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 2016 atoi(MgPV_nolen_const(mg)), FALSE);
7918f24d
NC
2017
2018 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
2019
8772537c
AL
2020 if (svp && SvIOKp(*svp)) {
2021 OP * const o = INT2PTR(OP*,SvIVX(*svp));
2022 if (o) {
2023 /* set or clear breakpoint in the relevant control op */
2024 if (i)
2025 o->op_flags |= OPf_SPECIAL;
2026 else
2027 o->op_flags &= ~OPf_SPECIAL;
2028 }
5df8de69 2029 }
79072805
LW
2030 return 0;
2031}
2032
2033int
8772537c 2034Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 2035{
97aff369 2036 dVAR;
502c6561 2037 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC
2038
2039 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2040
83bf042f 2041 if (obj) {
e1dccc0d 2042 sv_setiv(sv, AvFILL(obj));
83bf042f
NC
2043 } else {
2044 SvOK_off(sv);
2045 }
79072805
LW
2046 return 0;
2047}
2048
2049int
864dbfa3 2050Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 2051{
97aff369 2052 dVAR;
502c6561 2053 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC
2054
2055 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2056
83bf042f 2057 if (obj) {
e1dccc0d 2058 av_fill(obj, SvIV(sv));
83bf042f 2059 } else {
a2a5de95
NC
2060 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2061 "Attempt to set length of freed array");
83bf042f
NC
2062 }
2063 return 0;
2064}
2065
2066int
83f29afa
VP
2067Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2068{
2069 dVAR;
2070
2071 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2072 PERL_UNUSED_ARG(sv);
2073
2074 /* Reset the iterator when the array is cleared */
3565fbf3
VP
2075#if IVSIZE == I32SIZE
2076 *((IV *) &(mg->mg_len)) = 0;
2077#else
83f29afa
VP
2078 if (mg->mg_ptr)
2079 *((IV *) mg->mg_ptr) = 0;
3565fbf3 2080#endif
83f29afa
VP
2081
2082 return 0;
2083}
2084
2085int
83bf042f
NC
2086Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2087{
97aff369 2088 dVAR;
7918f24d
NC
2089
2090 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 2091 PERL_UNUSED_ARG(sv);
7918f24d 2092
94f3782b
DM
2093 /* during global destruction, mg_obj may already have been freed */
2094 if (PL_in_clean_all)
1ea47f64 2095 return 0;
94f3782b 2096
83bf042f
NC
2097 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2098
2099 if (mg) {
2100 /* arylen scalar holds a pointer back to the array, but doesn't own a
2101 reference. Hence the we (the array) are about to go away with it
2102 still pointing at us. Clear its pointer, else it would be pointing
2103 at free memory. See the comment in sv_magic about reference loops,
2104 and why it can't own a reference to us. */
2105 mg->mg_obj = 0;
2106 }
a0d0e21e
LW
2107 return 0;
2108}
2109
2110int
864dbfa3 2111Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2112{
97aff369 2113 dVAR;
16eb5365 2114 SV* const lsv = LvTARG(sv);
7918f24d
NC
2115
2116 PERL_ARGS_ASSERT_MAGIC_GETPOS;
16eb5365 2117 PERL_UNUSED_ARG(mg);
ac27b0f5 2118
a0d0e21e 2119 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
2120 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
2121 if (found && found->mg_len >= 0) {
2122 I32 i = found->mg_len;
7e2040f0 2123 if (DO_UTF8(lsv))
a0ed51b3 2124 sv_pos_b2u(lsv, &i);
e1dccc0d 2125 sv_setiv(sv, i);
a0d0e21e
LW
2126 return 0;
2127 }
2128 }
0c34ef67 2129 SvOK_off(sv);
a0d0e21e
LW
2130 return 0;
2131}
2132
2133int
864dbfa3 2134Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 2135{
97aff369 2136 dVAR;
16eb5365 2137 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
2138 SSize_t pos;
2139 STRLEN len;
c00206c8 2140 STRLEN ulen = 0;
53d44271 2141 MAGIC* found;
a0d0e21e 2142
7918f24d 2143 PERL_ARGS_ASSERT_MAGIC_SETPOS;
16eb5365 2144 PERL_UNUSED_ARG(mg);
ac27b0f5 2145
a0d0e21e 2146 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
2147 found = mg_find(lsv, PERL_MAGIC_regex_global);
2148 else
2149 found = NULL;
2150 if (!found) {
a0d0e21e
LW
2151 if (!SvOK(sv))
2152 return 0;
d83f0a82
NC
2153#ifdef PERL_OLD_COPY_ON_WRITE
2154 if (SvIsCOW(lsv))
2155 sv_force_normal_flags(lsv, 0);
2156#endif
3881461a 2157 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 2158 NULL, 0);
a0d0e21e
LW
2159 }
2160 else if (!SvOK(sv)) {
3881461a 2161 found->mg_len = -1;
a0d0e21e
LW
2162 return 0;
2163 }
4bac9ae4 2164 len = SvPOK_nog(lsv) ? SvCUR(lsv) : sv_len(lsv);
a0d0e21e 2165
e1dccc0d 2166 pos = SvIV(sv);
a0ed51b3 2167
7e2040f0 2168 if (DO_UTF8(lsv)) {
92cf6698 2169 ulen = sv_len_utf8_nomg(lsv);
a0ed51b3
LW
2170 if (ulen)
2171 len = ulen;
a0ed51b3
LW
2172 }
2173
a0d0e21e
LW
2174 if (pos < 0) {
2175 pos += len;
2176 if (pos < 0)
2177 pos = 0;
2178 }
eb160463 2179 else if (pos > (SSize_t)len)
a0d0e21e 2180 pos = len;
a0ed51b3
LW
2181
2182 if (ulen) {
92cf6698 2183 pos = sv_pos_u2b_flags(lsv, pos, 0, 0);
a0ed51b3 2184 }
727405f8 2185
3881461a
AL
2186 found->mg_len = pos;
2187 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 2188
79072805
LW
2189 return 0;
2190}
2191
2192int
864dbfa3 2193Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
2194{
2195 STRLEN len;
35a4481c 2196 SV * const lsv = LvTARG(sv);
b83604b4 2197 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB
2198 STRLEN offs = LvTARGOFF(sv);
2199 STRLEN rem = LvTARGLEN(sv);
83f78d1a
FC
2200 const bool negoff = LvFLAGS(sv) & 1;
2201 const bool negrem = LvFLAGS(sv) & 2;
7918f24d
NC
2202
2203 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2204 PERL_UNUSED_ARG(mg);
6ff81951 2205
83f78d1a
FC
2206 if (!translate_substr_offsets(
2207 SvUTF8(lsv) ? sv_len_utf8(lsv) : len,
2208 negoff ? -(IV)offs : (IV)offs, !negoff,
2209 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2210 )) {
2211 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2212 sv_setsv_nomg(sv, &PL_sv_undef);
2213 return 0;
2214 }
2215
9aa983d2 2216 if (SvUTF8(lsv))
d931b1be 2217 offs = sv_pos_u2b_flags(lsv, offs, &rem, SV_CONST_RETURN);
1c900557 2218 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2219 if (SvUTF8(lsv))
2ef4b674 2220 SvUTF8_on(sv);
6ff81951
GS
2221 return 0;
2222}
2223
2224int
864dbfa3 2225Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2226{
97aff369 2227 dVAR;
83f78d1a 2228 STRLEN len, lsv_len, oldtarglen, newtarglen;
5fcbf73d 2229 const char * const tmps = SvPV_const(sv, len);
dd374669 2230 SV * const lsv = LvTARG(sv);
777f7c56
EB
2231 STRLEN lvoff = LvTARGOFF(sv);
2232 STRLEN lvlen = LvTARGLEN(sv);
83f78d1a
FC
2233 const bool negoff = LvFLAGS(sv) & 1;
2234 const bool neglen = LvFLAGS(sv) & 2;
7918f24d
NC
2235
2236 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2237 PERL_UNUSED_ARG(mg);
075a4a2b 2238
a74fb2cd
FC
2239 SvGETMAGIC(lsv);
2240 if (SvROK(lsv))
2241 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2242 "Attempt to use reference as lvalue in substr"
2243 );
83f78d1a
FC
2244 if (SvUTF8(lsv)) lsv_len = sv_len_utf8(lsv);
2245 else (void)SvPV_nomg(lsv,lsv_len);
2246 if (!translate_substr_offsets(
2247 lsv_len,
2248 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2249 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2250 ))
2251 Perl_croak(aTHX_ "substr outside of string");
2252 oldtarglen = lvlen;
1aa99e6b 2253 if (DO_UTF8(sv)) {
9aa983d2 2254 sv_utf8_upgrade(lsv);
d931b1be 2255 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
a74fb2cd 2256 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2257 newtarglen = sv_len_utf8(sv);
9aa983d2
JH
2258 SvUTF8_on(lsv);
2259 }
9bf12eaf 2260 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2261 const char *utf8;
d931b1be 2262 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
83f78d1a 2263 newtarglen = len;
5fcbf73d 2264 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
a74fb2cd 2265 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
5fcbf73d 2266 Safefree(utf8);
1aa99e6b 2267 }
b76f3ce2 2268 else {
a74fb2cd 2269 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
83f78d1a 2270 newtarglen = len;
b76f3ce2 2271 }
83f78d1a
FC
2272 if (!neglen) LvTARGLEN(sv) = newtarglen;
2273 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
b76f3ce2 2274
79072805
LW
2275 return 0;
2276}
2277
2278int
864dbfa3 2279Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2280{
97aff369 2281 dVAR;
7918f24d
NC
2282
2283 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2284 PERL_UNUSED_ARG(sv);
7918f24d 2285
27cc343c 2286 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2287 return 0;
2288}
2289
2290int
864dbfa3 2291Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2292{
97aff369 2293 dVAR;
7918f24d
NC
2294
2295 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2296 PERL_UNUSED_ARG(sv);
7918f24d 2297
b01e650a
DM
2298 /* update taint status */
2299 if (PL_tainted)
2300 mg->mg_len |= 1;
2301 else
2302 mg->mg_len &= ~1;
463ee0b2
LW
2303 return 0;
2304}
2305
2306int
864dbfa3 2307Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2308{
35a4481c 2309 SV * const lsv = LvTARG(sv);
7918f24d
NC
2310
2311 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2312 PERL_UNUSED_ARG(mg);
6ff81951 2313
6136c704
AL
2314 if (lsv)
2315 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2316 else
0c34ef67 2317 SvOK_off(sv);
6ff81951 2318
6ff81951
GS
2319 return 0;
2320}
2321
2322int
864dbfa3 2323Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2324{
7918f24d 2325 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2326 PERL_UNUSED_ARG(mg);
79072805
LW
2327 do_vecset(sv); /* XXX slurp this routine */
2328 return 0;
2329}
2330
2331int
864dbfa3 2332Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2333{
97aff369 2334 dVAR;
a0714e2c 2335 SV *targ = NULL;
7918f24d
NC
2336
2337 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2338
5f05dabc 2339 if (LvTARGLEN(sv)) {
68dc0745 2340 if (mg->mg_obj) {
8772537c 2341 SV * const ahv = LvTARG(sv);
85fbaab2 2342 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
6d822dc4
MS
2343 if (he)
2344 targ = HeVAL(he);
68dc0745
PP
2345 }
2346 else {
502c6561 2347 AV *const av = MUTABLE_AV(LvTARG(sv));
68dc0745
PP
2348 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2349 targ = AvARRAY(av)[LvTARGOFF(sv)];
2350 }
46da273f 2351 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2352 /* somebody else defined it for us */
2353 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2354 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2355 LvTARGLEN(sv) = 0;
2356 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2357 mg->mg_obj = NULL;
68dc0745
PP
2358 mg->mg_flags &= ~MGf_REFCOUNTED;
2359 }
5f05dabc 2360 }
71be2cbc
PP
2361 else
2362 targ = LvTARG(sv);
3280af22 2363 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2364 return 0;
2365}
2366
2367int
864dbfa3 2368Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2369{
7918f24d 2370 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2371 PERL_UNUSED_ARG(mg);
71be2cbc 2372 if (LvTARGLEN(sv))
68dc0745
PP
2373 vivify_defelem(sv);
2374 if (LvTARG(sv)) {
5f05dabc 2375 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2376 SvSETMAGIC(LvTARG(sv));
2377 }
5f05dabc
PP
2378 return 0;
2379}
2380
71be2cbc 2381void
864dbfa3 2382Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2383{
97aff369 2384 dVAR;
74e13ce4 2385 MAGIC *mg;
a0714e2c 2386 SV *value = NULL;
71be2cbc 2387
7918f24d
NC
2388 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2389
14befaf4 2390 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2391 return;
68dc0745 2392 if (mg->mg_obj) {
8772537c 2393 SV * const ahv = LvTARG(sv);
85fbaab2 2394 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS
2395 if (he)
2396 value = HeVAL(he);
3280af22 2397 if (!value || value == &PL_sv_undef)
be2597df 2398 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2399 }
68dc0745 2400 else {
502c6561 2401 AV *const av = MUTABLE_AV(LvTARG(sv));
5aabfad6 2402 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2403 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2404 else {
d4c19fe8 2405 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2406 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2407 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2408 }
2409 }
b37c2d43 2410 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2411 SvREFCNT_dec(LvTARG(sv));
2412 LvTARG(sv) = value;
71be2cbc 2413 LvTARGLEN(sv) = 0;
68dc0745 2414 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2415 mg->mg_obj = NULL;
68dc0745 2416 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2417}
2418
2419int
864dbfa3 2420Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2421{
7918f24d 2422 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
5648c0ae
DM
2423 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2424 return 0;
810b8aa5
GS
2425}
2426
2427int
864dbfa3 2428Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2429{
7918f24d 2430 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2431 PERL_UNUSED_CONTEXT;
0177730e 2432 PERL_UNUSED_ARG(sv);
565764a8 2433 mg->mg_len = -1;
93a17b20
LW
2434 return 0;
2435}
2436
2437int
864dbfa3 2438Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2439{
35a4481c 2440 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2441
7918f24d
NC
2442 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2443
79072805 2444 if (uf && uf->uf_set)
24f81a43 2445 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2446 return 0;
2447}
2448
c277df42 2449int
faf82a0b
AE
2450Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2451{
488344d2 2452 const char type = mg->mg_type;
7918f24d
NC
2453
2454 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2455
488344d2
NC
2456 if (type == PERL_MAGIC_qr) {
2457 } else if (type == PERL_MAGIC_bm) {
2458 SvTAIL_off(sv);
2459 SvVALID_off(sv);
2460 } else {
2461 assert(type == PERL_MAGIC_fm);
488344d2
NC
2462 }
2463 return sv_unmagic(sv, type);
faf82a0b
AE
2464}
2465
7a4c00b4 2466#ifdef USE_LOCALE_COLLATE
79072805 2467int
864dbfa3 2468Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2469{
7918f24d
NC
2470 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2471
bbce6d69 2472 /*
838b5b74 2473 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2474 * and vanished with a faint plop.
2475 */
96a5add6 2476 PERL_UNUSED_CONTEXT;
8772537c 2477 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2478 if (mg->mg_ptr) {
2479 Safefree(mg->mg_ptr);
2480 mg->mg_ptr = NULL;
565764a8 2481 mg->mg_len = -1;
7a4c00b4 2482 }
bbce6d69
PP
2483 return 0;
2484}
7a4c00b4 2485#endif /* USE_LOCALE_COLLATE */
bbce6d69 2486
7e8c5dac
HS
2487/* Just clear the UTF-8 cache data. */
2488int
2489Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2490{
7918f24d 2491 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2492 PERL_UNUSED_CONTEXT;
8772537c 2493 PERL_UNUSED_ARG(sv);
7e8c5dac 2494 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2495 mg->mg_ptr = NULL;
7e8c5dac
HS
2496 mg->mg_len = -1; /* The mg_len holds the len cache. */
2497 return 0;
2498}
2499
bbce6d69 2500int
864dbfa3 2501Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2502{
97aff369 2503 dVAR;
eb578fdb
KW
2504 const char *s;
2505 I32 paren;
2506 const REGEXP * rx;
2fdbfb4d 2507 const char * const remaining = mg->mg_ptr + 1;
79072805 2508 I32 i;
8990e307 2509 STRLEN len;
125b9982 2510 MAGIC *tmg;
2fdbfb4d 2511
7918f24d
NC
2512 PERL_ARGS_ASSERT_MAGIC_SET;
2513
79072805 2514 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2515 case '\015': /* $^MATCH */
2516 if (strEQ(remaining, "ATCH"))
2517 goto do_match;
2518 case '`': /* ${^PREMATCH} caught below */
2519 do_prematch:
f1b875a0 2520 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2521 goto setparen;
2522 case '\'': /* ${^POSTMATCH} caught below */
2523 do_postmatch:
f1b875a0 2524 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2525 goto setparen;
2526 case '&':
2527 do_match:
f1b875a0 2528 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2529 goto setparen;
2530 case '1': case '2': case '3': case '4':
2531 case '5': case '6': case '7': case '8': case '9':
104a8018 2532 paren = atoi(mg->mg_ptr);
2fdbfb4d 2533 setparen:
1e05feb3 2534 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9bad346 2535 setparen_got_rx:
2fdbfb4d 2536 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
1e05feb3 2537 } else {
2fdbfb4d
AB
2538 /* Croak with a READONLY error when a numbered match var is
2539 * set without a previous pattern match. Unless it's C<local $1>
2540 */
d9bad346 2541 croakparen:
2fdbfb4d 2542 if (!PL_localizing) {
6ad8f254 2543 Perl_croak_no_modify(aTHX);
2fdbfb4d
AB
2544 }
2545 }
9b9e0be4 2546 break;
748a9306 2547 case '\001': /* ^A */
f2da823f
FC
2548 if (SvOK(sv)) sv_copypv(PL_bodytarget, sv);
2549 else SvOK_off(PL_bodytarget);
64eff8b7
DM
2550 FmLINES(PL_bodytarget) = 0;
2551 if (SvPOK(PL_bodytarget)) {
2552 char *s = SvPVX(PL_bodytarget);
2553 while ( ((s = strchr(s, '\n'))) ) {
2554 FmLINES(PL_bodytarget)++;
2555 s++;
2556 }
2557 }
125b9982
NT
2558 /* mg_set() has temporarily made sv non-magical */
2559 if (PL_tainting) {
2560 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2561 SvTAINTED_on(PL_bodytarget);
2562 else
2563 SvTAINTED_off(PL_bodytarget);
2564 }
748a9306 2565 break;
49460fe6 2566 case '\003': /* ^C */
f2338a2e 2567 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS
2568 break;
2569
79072805 2570 case '\004': /* ^D */
b4ab917c 2571#ifdef DEBUGGING
b83604b4 2572 s = SvPV_nolen_const(sv);
ddcf8bc1 2573 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS
2574 if (DEBUG_x_TEST || DEBUG_B_TEST)
2575 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2576#else
38ab35f8 2577 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2578#endif
79072805 2579 break;
28f23441 2580 case '\005': /* ^E */
d0063567 2581 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2582#ifdef VMS
38ab35f8 2583 set_vaxc_errno(SvIV(sv));
e37778c2
NC
2584#else
2585# ifdef WIN32
d0063567 2586 SetLastError( SvIV(sv) );
e37778c2
NC
2587# else
2588# ifdef OS2
38ab35f8 2589 os2_setsyserrno(SvIV(sv));
e37778c2 2590# else
d0063567 2591 /* will anyone ever use this? */
38ab35f8 2592 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ
2593# endif
2594# endif
22fae026 2595#endif
d0063567
DK
2596 }
2597 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2598 SvREFCNT_dec(PL_encoding);
d0063567
DK
2599 if (SvOK(sv) || SvGMAGICAL(sv)) {
2600 PL_encoding = newSVsv(sv);
2601 }
2602 else {
a0714e2c 2603 PL_encoding = NULL;
d0063567
DK
2604 }
2605 }
2606 break;
79072805 2607 case '\006': /* ^F */
38ab35f8 2608 PL_maxsysfd = SvIV(sv);
79072805 2609 break;
a0d0e21e 2610 case '\010': /* ^H */
38ab35f8 2611 PL_hints = SvIV(sv);
a0d0e21e 2612 break;
9d116dd7 2613 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2614 Safefree(PL_inplace);
bd61b366 2615 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2616 break;
d9bad346
FC
2617 case '\016': /* ^N */
2618 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2619 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2620 goto croakparen;
28f23441 2621 case '\017': /* ^O */
ac27b0f5 2622 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2623 Safefree(PL_osname);
bd61b366 2624 PL_osname = NULL;
3511154c
DM
2625 if (SvOK(sv)) {
2626 TAINT_PROPER("assigning to $^O");
2e0de35c 2627 PL_osname = savesvpv(sv);
3511154c 2628 }
ac27b0f5
NIS
2629 }
2630 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2631 STRLEN len;
2632 const char *const start = SvPV(sv, len);
b54fc2b6 2633 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2634 SV *tmp;
8b850bd5
NC
2635
2636
2637 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2638 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC
2639
2640 /* Opening for input is more common than opening for output, so
2641 ensure that hints for input are sooner on linked list. */
59cd0e26 2642 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z
2643 SvUTF8(sv))
2644 : newSVpvs_flags("", SvUTF8(sv));
2645 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2646 mg_set(tmp);
8b850bd5 2647
f747ebd6
Z
2648 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2649 SvUTF8(sv));
2650 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2651 mg_set(tmp);
ac27b0f5 2652 }
28f23441 2653 break;
79072805 2654 case '\020': /* ^P */
2fdbfb4d
AB
2655 if (*remaining == '\0') { /* ^P */
2656 PL_perldb = SvIV(sv);
2657 if (PL_perldb && !PL_DBsingle)
2658 init_debugger();
2659 break;
2660 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2661 goto do_prematch;
2662 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2663 goto do_postmatch;
2664 }
9b9e0be4 2665 break;
79072805 2666 case '\024': /* ^T */
88e89b8a 2667#ifdef BIG_TIME
6b88bc9c 2668 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2669#else
38ab35f8 2670 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2671#endif
79072805 2672 break;
e07ea26a
NC
2673 case '\025': /* ^UTF8CACHE */
2674 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2675 PL_utf8cache = (signed char) sv_2iv(sv);
2676 }
2677 break;
fde18df1 2678 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2679 if (*(mg->mg_ptr+1) == '\0') {
2680 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2681 i = SvIV(sv);
ac27b0f5 2682 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2683 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2684 }
599cee73 2685 }
0a378802 2686 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2687 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
7e4f0450
FC
2688 if (!SvPOK(sv)) {
2689 PL_compiling.cop_warnings = pWARN_STD;
d775746e
GS
2690 break;
2691 }
f4fc7782 2692 {
b5477537 2693 STRLEN len, i;
d3a7d8c7 2694 int accumulate = 0 ;
f4fc7782 2695 int any_fatals = 0 ;
b83604b4 2696 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2697 for (i = 0 ; i < len ; ++i) {
2698 accumulate |= ptr[i] ;
2699 any_fatals |= (ptr[i] & 0xAA) ;
2700 }
4243c432
NC
2701 if (!accumulate) {
2702 if (!specialWARN(PL_compiling.cop_warnings))
2703 PerlMemShared_free(PL_compiling.cop_warnings);
2704 PL_compiling.cop_warnings = pWARN_NONE;
2705 }
72dc9ed5
NC
2706 /* Yuck. I can't see how to abstract this: */
2707 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2708 WARN_ALL) && !any_fatals) {
4243c432
NC
2709 if (!specialWARN(PL_compiling.cop_warnings))
2710 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2711 PL_compiling.cop_warnings = pWARN_ALL;
2712 PL_dowarn |= G_WARN_ONCE ;
727405f8 2713 }
d3a7d8c7 2714 else {
72dc9ed5
NC
2715 STRLEN len;
2716 const char *const p = SvPV_const(sv, len);
2717
2718 PL_compiling.cop_warnings
8ee4cf24 2719 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2720 p, len);
2721
d3a7d8c7
GS
2722 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2723 PL_dowarn |= G_WARN_ONCE ;
2724 }
f4fc7782 2725
d3a7d8c7 2726 }
4438c4b7 2727 }
971a9dd3 2728 }
79072805
LW
2729 break;
2730 case '.':
3280af22
NIS
2731 if (PL_localizing) {
2732 if (PL_localizing == 1)
7766f137 2733 SAVESPTR(PL_last_in_gv);
748a9306 2734 }
3280af22 2735 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2736 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2737 break;
2738 case '^':
acbe1b9d
FC
2739 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2740 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2741 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2742 break;
2743 case '~':
acbe1b9d
FC
2744 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2745 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2746 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2747 break;
2748 case '=':
acbe1b9d 2749 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2750 break;
2751 case '-':
acbe1b9d
FC
2752 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2753 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
099be4f1 2754 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2755 break;
2756 case '%':
acbe1b9d 2757 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2758 break;
2759 case '|':
4b65379b 2760 {
099be4f1 2761 IO * const io = GvIO(PL_defoutgv);
720f287d
AB
2762 if(!io)
2763 break;
38ab35f8 2764 if ((SvIV(sv)) == 0)
4b65379b
CS
2765 IoFLAGS(io) &= ~IOf_FLUSH;
2766 else {
2767 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2768 PerlIO *ofp = IoOFP(io);
2769 if (ofp)
2770 (void)PerlIO_flush(ofp);
2771 IoFLAGS(io) |= IOf_FLUSH;
2772 }
2773 }
79072805
LW
2774 }
2775 break;
79072805 2776 case '/':
3280af22 2777 SvREFCNT_dec(PL_rs);
8bfdd7d9 2778 PL_rs = newSVsv(sv);
79072805
LW
2779 break;
2780 case '\\':
ef8d46e8 2781 SvREFCNT_dec(PL_ors_sv);
6bc2995b 2782 if (SvOK(sv)) {
7889fe52 2783 PL_ors_sv = newSVsv(sv);
009c130f 2784 }
e3c19b7b 2785 else {
a0714e2c 2786 PL_ors_sv = NULL;
e3c19b7b 2787 }
79072805 2788 break;
7d69d4a6
FC
2789 case '[':
2790 if (SvIV(sv) != 0)
2791 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2792 break;
79072805 2793 case '?':
ff0cee69 2794#ifdef COMPLEX_STATUS
6b88bc9c 2795 if (PL_localizing == 2) {
41cb7b2b 2796 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS
2797 PL_statusvalue = LvTARGOFF(sv);
2798 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2799 }
2800 else
2801#endif
2802#ifdef VMSISH_STATUS
2803 if (VMSISH_STATUS)
fb38d079 2804 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2805 else
2806#endif
38ab35f8 2807 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2808 break;
2809 case '!':
93189314
JH
2810 {
2811#ifdef VMS
2812# define PERL_VMS_BANG vaxc$errno
2813#else
2814# define PERL_VMS_BANG 0
2815#endif
91487cfc 2816 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2817 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2818 }
79072805
LW
2819 break;
2820 case '<':
985213f2
AB
2821 {
2822 const IV new_uid = SvIV(sv);
2823 PL_delaymagic_uid = new_uid;
3280af22
NIS
2824 if (PL_delaymagic) {
2825 PL_delaymagic |= DM_RUID;
79072805
LW
2826 break; /* don't do magic till later */
2827 }
2828#ifdef HAS_SETRUID
985213f2 2829 (void)setruid((Uid_t)new_uid);
79072805
LW
2830#else
2831#ifdef HAS_SETREUID
985213f2 2832 (void)setreuid((Uid_t)new_uid, (Uid_t)-1);
748a9306 2833#else
85e6fe83 2834#ifdef HAS_SETRESUID
985213f2 2835 (void)setresuid((Uid_t)new_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2836#else
985213f2 2837 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
75870ed3 2838#ifdef PERL_DARWIN
2839 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
985213f2 2840 if (new_uid != 0 && PerlProc_getuid() == 0)
75870ed3 2841 (void)PerlProc_setuid(0);
2842#endif
985213f2 2843 (void)PerlProc_setuid(new_uid);
75870ed3 2844 } else {
cea2e8a9 2845 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2846 }
79072805
LW
2847#endif
2848#endif
85e6fe83 2849#endif
79072805 2850 break;
985213f2 2851 }
79072805 2852 case '>':
985213f2
AB
2853 {
2854 const UV new_euid = SvIV(sv);
2855 PL_delaymagic_euid = new_euid;
3280af22
NIS
2856 if (PL_delaymagic) {
2857 PL_delaymagic |= DM_EUID;
79072805
LW
2858 break; /* don't do magic till later */
2859 }
2860#ifdef HAS_SETEUID
985213f2 2861 (void)seteuid((Uid_t)new_euid);
79072805
LW
2862#else
2863#ifdef HAS_SETREUID
985213f2 2864 (void)setreuid((Uid_t)-1, (Uid_t)new_euid);
85e6fe83
LW
2865#else
2866#ifdef HAS_SETRESUID
985213f2 2867 (void)setresuid((Uid_t)-1, (Uid_t)new_euid, (Uid_t)-1);
79072805 2868#else
985213f2 2869 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
382669a9 2870 PerlProc_setuid(new_euid);
a0d0e21e 2871 else {
cea2e8a9 2872 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2873 }
79072805
LW
2874#endif
2875#endif
85e6fe83 2876#endif
79072805 2877 break;
985213f2 2878 }
79072805 2879 case '(':
985213f2
AB
2880 {
2881 const UV new_gid = SvIV(sv);
2882 PL_delaymagic_gid = new_gid;
3280af22
NIS
2883 if (PL_delaymagic) {
2884 PL_delaymagic |= DM_RGID;
79072805
LW
2885 break; /* don't do magic till later */
2886 }
2887#ifdef HAS_SETRGID
985213f2 2888 (void)setrgid((Gid_t)new_gid);
79072805
LW
2889#else
2890#ifdef HAS_SETREGID
985213f2 2891 (void)setregid((Gid_t)new_gid, (Gid_t)-1);
85e6fe83
LW
2892#else
2893#ifdef HAS_SETRESGID
985213f2 2894 (void)setresgid((Gid_t)new_gid, (Gid_t)-1, (Gid_t) -1);
79072805 2895#else
985213f2
AB
2896 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2897 (void)PerlProc_setgid(new_gid);
748a9306 2898 else {
cea2e8a9 2899 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2900 }
79072805
LW
2901#endif
2902#endif
85e6fe83 2903#endif
79072805 2904 break;
985213f2 2905 }
79072805 2906 case ')':
985213f2
AB
2907 {
2908 UV new_egid;
5cd24f17
PP
2909#ifdef HAS_SETGROUPS
2910 {
b83604b4 2911 const char *p = SvPV_const(sv, len);
757f63d8 2912 Groups_t *gary = NULL;
fb4089e0 2913#ifdef _SC_NGROUPS_MAX
2914 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2915
2916 if (maxgrp < 0)
2917 maxgrp = NGROUPS;
2918#else
2919 int maxgrp = NGROUPS;
2920#endif
757f63d8
SP
2921
2922 while (isSPACE(*p))
2923 ++p;
985213f2 2924 new_egid = Atol(p);
fb4089e0 2925 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP
2926 while (*p && !isSPACE(*p))
2927 ++p;
2928 while (isSPACE(*p))
2929 ++p;
2930 if (!*p)
2931 break;
2932 if(!gary)
2933 Newx(gary, i + 1, Groups_t);
2934 else
2935 Renew(gary, i + 1, Groups_t);
2936 gary[i] = Atol(p);
2937 }
2938 if (i)
2939 (void)setgroups(i, gary);
f5a63d97 2940 Safefree(gary);
5cd24f17
PP
2941 }
2942#else /* HAS_SETGROUPS */
985213f2 2943 new_egid = SvIV(sv);
5cd24f17 2944#endif /* HAS_SETGROUPS */
985213f2 2945 PL_delaymagic_egid = new_egid;
3280af22
NIS
2946 if (PL_delaymagic) {
2947 PL_delaymagic |= DM_EGID;
79072805
LW
2948 break; /* don't do magic till later */
2949 }
2950#ifdef HAS_SETEGID
985213f2 2951 (void)setegid((Gid_t)new_egid);
79072805
LW
2952#else
2953#ifdef HAS_SETREGID
985213f2 2954 (void)setregid((Gid_t)-1, (Gid_t)new_egid);
85e6fe83
LW
2955#else
2956#ifdef HAS_SETRESGID
985213f2 2957 (void)setresgid((Gid_t)-1, (Gid_t)new_egid, (Gid_t)-1);
79072805 2958#else
985213f2
AB
2959 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2960 (void)PerlProc_setgid(new_egid);
748a9306 2961 else {
cea2e8a9 2962 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2963 }
79072805
LW
2964#endif
2965#endif
85e6fe83 2966#endif
79072805 2967 break;
985213f2 2968 }
79072805 2969 case ':':
2d8e6c8d 2970 PL_chopset = SvPV_force(sv,len);
79072805 2971 break;
9cdac2a2
FC
2972 case '$': /* $$ */
2973 /* Store the pid in mg->mg_obj so we can tell when a fork has
2974 occurred. mg->mg_obj points to *$ by default, so clear it. */
2975 if (isGV(mg->mg_obj)) {
2976 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2977 SvREFCNT_dec(mg->mg_obj);
2978 mg->mg_flags |= MGf_REFCOUNTED;
2979 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2980 }
2981 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2982 break;
79072805 2983 case '0':
e2975953 2984 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2985#ifdef HAS_SETPROCTITLE
2986 /* The BSDs don't show the argv[] in ps(1) output, they
2987 * show a string from the process struct and provide
2988 * the setproctitle() routine to manipulate that. */
a2722ac9 2989 if (PL_origalen != 1) {
b83604b4 2990 s = SvPV_const(sv, len);
98b76f99 2991# if __FreeBSD_version > 410001
9aad2c0e 2992 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2993 * but not the "(perl) suffix from the ps(1)
2994 * output, because that's what ps(1) shows if the
2995 * argv[] is modified. */
6f2ad931 2996 setproctitle("-%s", s);
9aad2c0e 2997# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2998 /* This doesn't really work if you assume that
2999 * $0 = 'foobar'; will wipe out 'perl' from the $0
3000 * because in ps(1) output the result will be like
3001 * sprintf("perl: %s (perl)", s)
3002 * I guess this is a security feature:
3003 * one (a user process) cannot get rid of the original name.
3004 * --jhi */
3005 setproctitle("%s", s);
3006# endif
3007 }
9d3968b2 3008#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 3009 if (PL_origalen != 1) {
17aa7f3d 3010 union pstun un;
b83604b4 3011 s = SvPV_const(sv, len);
6867be6d 3012 un.pst_command = (char *)s;
17aa7f3d
JH
3013 pstat(PSTAT_SETCMD, un, len, 0, 0);
3014 }
9d3968b2 3015#else
2d2af554
GA
3016 if (PL_origalen > 1) {
3017 /* PL_origalen is set in perl_parse(). */
3018 s = SvPV_force(sv,len);
3019 if (len >= (STRLEN)PL_origalen-1) {
3020 /* Longer than original, will be truncated. We assume that
3021 * PL_origalen bytes are available. */
3022 Copy(s, PL_origargv[0], PL_origalen-1, char);
3023 }
3024 else {
3025 /* Shorter than original, will be padded. */
235ac35d 3026#ifdef PERL_DARWIN
60777a0d
JH
3027 /* Special case for Mac OS X: see [perl #38868] */
3028 const int pad = 0;
235ac35d 3029#else
8a89a4f1
MB
3030 /* Is the space counterintuitive? Yes.
3031 * (You were expecting \0?)
3032 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3033 * --jhi */
60777a0d 3034 const int pad = ' ';
235ac35d 3035#endif
60777a0d
JH
3036 Copy(s, PL_origargv[0], len, char);
3037 PL_origargv[0][len] = 0;
3038 memset(PL_origargv[0] + len + 1,
3039 pad, PL_origalen - len - 1);
2d2af554
GA
3040 }
3041 PL_origargv[0][PL_origalen-1] = 0;
3042 for (i = 1; i < PL_origargc; i++)
3043 PL_origargv[i] = 0;
7636ea95
AB
3044#ifdef HAS_PRCTL_SET_NAME
3045 /* Set the legacy process name in addition to the POSIX name on Linux */
3046 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3047 /* diag_listed_as: SKIPME */
3048 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3049 }
3050#endif
79072805 3051 }
9d3968b2 3052#endif
e2975953 3053 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW
3054 break;
3055 }
3056 return 0;
3057}
3058
3059I32
84c7b88c
BF
3060Perl_whichsig_sv(pTHX_ SV *sigsv)
3061{
3062 const char *sigpv;
3063 STRLEN siglen;
3064 PERL_ARGS_ASSERT_WHICHSIG_SV;
3065 PERL_UNUSED_CONTEXT;
3066 sigpv = SvPV_const(sigsv, siglen);
3067 return whichsig_pvn(sigpv, siglen);
3068}
3069
3070I32
3071Perl_whichsig_pv(pTHX_ const char *sig)
3072{
3073 PERL_ARGS_ASSERT_WHICHSIG_PV;
3074 PERL_UNUSED_CONTEXT;
3075 return whichsig_pvn(sig, strlen(sig));
3076}
3077
3078I32
3079Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
79072805 3080{
eb578fdb 3081 char* const* sigv;
7918f24d 3082
84c7b88c 3083 PERL_ARGS_ASSERT_WHICHSIG_PVN;
96a5add6 3084 PERL_UNUSED_CONTEXT;
79072805 3085
aadb217d 3086 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
84c7b88c 3087 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
aadb217d 3088 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805 3089#ifdef SIGCLD
84c7b88c 3090 if (memEQs(sig, len, "CHLD"))
79072805
LW
3091 return SIGCLD;
3092#endif
3093#ifdef SIGCHLD
84c7b88c 3094 if (memEQs(sig, len, "CLD"))
79072805
LW
3095 return SIGCHLD;
3096#endif
7f1236c0 3097 return -1;
79072805
LW
3098}
3099
ecfc5424 3100Signal_t
1e82f5a6 3101#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3102Perl_sighandler(int sig, siginfo_t *sip, void *uap)
1e82f5a6
SH
3103#else
3104Perl_sighandler(int sig)
3105#endif
79072805 3106{
1018e26f
NIS
3107#ifdef PERL_GET_SIG_CONTEXT
3108 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 3109#else
cea2e8a9 3110 dTHX;
71d280e3 3111#endif
79072805 3112 dSP;
a0714e2c
SS
3113 GV *gv = NULL;
3114 SV *sv = NULL;
8772537c 3115 SV * const tSv = PL_Sv;
601f1833 3116 CV *cv = NULL;
533c011a 3117 OP *myop = PL_op;
84902520 3118 U32 flags = 0;
8772537c 3119 XPV * const tXpv = PL_Xpv;
0c4d3b5e 3120 I32 old_ss_ix = PL_savestack_ix;
100c03aa 3121 SV *errsv_save = NULL;
71d280e3 3122
84902520 3123
727405f8 3124 if (!PL_psig_ptr[sig]) {
99ef548b 3125 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
3126 PL_sig_name[sig]);
3127 exit(sig);
3128 }
ff0cee69 3129
a0d63a7b
DM
3130 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3131 /* Max number of items pushed there is 3*n or 4. We cannot fix
3132 infinity, so we fix 4 (in fact 5): */
3133 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3134 flags |= 1;
3135 PL_savestack_ix += 5; /* Protect save in progress. */
3136 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3137 }
84902520 3138 }
84902520 3139 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 3140 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL
3141 || SvTYPE(cv) != SVt_PVCV) {
3142 HV *st;
f2c0649b 3143 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 3144 }
84902520 3145
a0d0e21e 3146 if (!cv || !CvROOT(cv)) {
a2a5de95
NC
3147 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3148 PL_sig_name[sig], (gv ? GvENAME(gv)
3149 : ((cv && CvGV(cv))
3150 ? GvENAME(CvGV(cv))
3151 : "__ANON__")));
00d579c5 3152 goto cleanup;
79072805
LW
3153 }
3154
0c4d3b5e
DM
3155 sv = PL_psig_name[sig]
3156 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3157 : newSVpv(PL_sig_name[sig],0);
72048cfe 3158 flags |= 8;
0c4d3b5e
DM
3159 SAVEFREESV(sv);
3160
a0d63a7b
DM
3161 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3162 /* make sure our assumption about the size of the SAVEs are correct:
3163 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3164 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3165 }
e336de0d 3166
e788e7d3 3167 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 3168 PUSHMARK(SP);
79072805 3169 PUSHs(sv);
8aad04aa
JH
3170#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3171 {
3172 struct sigaction oact;
3173
3174 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH
3175 if (sip) {
3176 HV *sih = newHV();
ad64d0ec 3177 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH
3178 /* The siginfo fields signo, code, errno, pid, uid,
3179 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC
3180 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3181 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 3182#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
3183 hv_stores(sih, "errno", newSViv(sip->si_errno));
3184 hv_stores(sih, "status", newSViv(sip->si_status));
3185 hv_stores(sih, "uid", newSViv(sip->si_uid));
3186 hv_stores(sih, "pid", newSViv(sip->si_pid));
3187 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3188 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 3189#endif
8aad04aa 3190 EXTEND(SP, 2);
ad64d0ec 3191 PUSHs(rv);
22f1178f 3192 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 3193 }
b4552a27 3194
8aad04aa
JH
3195 }
3196 }
3197#endif
79072805 3198 PUTBACK;
a0d0e21e 3199
100c03aa
JL
3200 errsv_save = newSVsv(ERRSV);
3201
ad64d0ec 3202 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 3203
d3acc0f7 3204 POPSTACK;
1b266415 3205 if (SvTRUE(ERRSV)) {
100c03aa 3206 SvREFCNT_dec(errsv_save);
c22d665b 3207#ifndef PERL_MICRO
1b266415
NIS
3208 /* Handler "died", for example to get out of a restart-able read().
3209 * Before we re-do that on its behalf re-enable the signal which was
3210 * blocked by the system when we entered.
3211 */
c22d665b 3212#ifdef HAS_SIGPROCMASK
d488af49 3213#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b3dbdd48 3214 if (sip || uap)
c22d665b
LT
3215#endif
3216 {
3217 sigset_t set;
3218 sigemptyset(&set);
3219 sigaddset(&set,sig);
3220 sigprocmask(SIG_UNBLOCK, &set, NULL);
3221 }
3222#else
1b266415
NIS
3223 /* Not clear if this will work */
3224 (void)rsignal(sig, SIG_IGN);
5c1546dc 3225 (void)rsignal(sig, PL_csighandlerp);
c22d665b
LT
3226#endif
3227#endif /* !PERL_MICRO */
c5df3096 3228 die_sv(ERRSV);
1b266415 3229 }
100c03aa
JL
3230 else {
3231 sv_setsv(ERRSV, errsv_save);
3232 SvREFCNT_dec(errsv_save);
3233 }
3234
00d579c5 3235cleanup:
0c4d3b5e
DM
3236 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3237 PL_savestack_ix = old_ss_ix;
72048cfe 3238 if (flags & 8)
84902520 3239 SvREFCNT_dec(sv);
533c011a 3240 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3241
3280af22
NIS
3242 PL_Sv = tSv; /* Restore global temporaries. */
3243 PL_Xpv = tXpv;
53bb94e2 3244 return;
79072805 3245}
4e35701f
NIS
3246
3247
51371543 3248static void
8772537c 3249S_restore_magic(pTHX_ const void *p)
51371543 3250{
97aff369 3251 dVAR;
8772537c
AL
3252 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3253 SV* const sv = mgs->mgs_sv;
150b625d 3254 bool bumped;
51371543
GS
3255
3256 if (!sv)
3257 return;
3258
4bac9ae4
CS
3259 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3260 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
f8c7b90f 3261#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
3262 /* While magic was saved (and off) sv_setsv may well have seen
3263 this SV as a prime candidate for COW. */
3264 if (SvIsCOW(sv))
e424a81e 3265 sv_force_normal_flags(sv, 0);
f9701176 3266#endif
f9c6fee5
CS
3267 if (mgs->mgs_readonly)
3268 SvREADONLY_on(sv);
3269 if (mgs->mgs_magical)
3270 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS
3271 else
3272 mg_magical(sv);
51371543
GS
3273 }
3274
150b625d 3275 bumped = mgs->mgs_bumped;
51371543
GS
3276 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3277
3278 /* If we're still on top of the stack, pop us off. (That condition
3279 * will be satisfied if restore_magic was called explicitly, but *not*
3280 * if it's being called via leave_scope.)
3281 * The reason for doing this is that otherwise, things like sv_2cv()
3282 * may leave alloc gunk on the savestack, and some code
3283 * (e.g. sighandler) doesn't expect that...
3284 */
3285 if (PL_savestack_ix == mgs->mgs_ss_ix)
3286 {
1be36ce0
NC
3287 UV popval = SSPOPUV;
3288 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3289 PL_savestack_ix -= 2;
1be36ce0
NC
3290 popval = SSPOPUV;
3291 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3292 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543 3293 }
150b625d
DM
3294 if (bumped) {
3295 if (SvREFCNT(sv) == 1) {
3296 /* We hold the last reference to this SV, which implies that the
3297 SV was deleted as a side effect of the routines we called.
3298 So artificially keep it alive a bit longer.
3299 We avoid turning on the TEMP flag, which can cause the SV's
3300 buffer to get stolen (and maybe other stuff). */
150b625d 3301 sv_2mortal(sv);
4bac9ae4 3302 SvTEMP_off(sv);
8985fe98 3303 }
150b625d
DM
3304 else
3305 SvREFCNT_dec(sv); /* undo the inc in S_save_magic() */
8985fe98 3306 }
51371543
GS
3307}
3308
0c4d3b5e
DM
3309/* clean up the mess created by Perl_sighandler().
3310 * Note that this is only called during an exit in a signal handler;
3311 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
9a7f166c 3312 * skipped over. */
0c4d3b5e 3313
51371543 3314static void
8772537c 3315S_unwind_handler_stack(pTHX_ const void *p)
51371543 3316{
27da23d5 3317 dVAR;
0c4d3b5e 3318 PERL_UNUSED_ARG(p);
7918f24d 3319
0c4d3b5e 3320 PL_savestack_ix -= 5; /* Unprotect save in progress. */
51371543 3321}
1018e26f 3322
66610fdd 3323/*
b3ca2e83
NC
3324=for apidoc magic_sethint
3325
3326Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3327C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3328anything that would need a deep copy. Maybe we should warn if we find a
3329reference.
b3ca2e83
NC
3330
3331=cut
3332*/
3333int
3334Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3335{
3336 dVAR;
ad64d0ec 3337 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
59cd0e26 3338 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
b3ca2e83 3339
7918f24d
NC
3340 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3341
e6e3e454
NC
3342 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3343 an alternative leaf in there, with PL_compiling.cop_hints being used if
3344 it's NULL. If needed for threads, the alternative could lock a mutex,
3345 or take other more complex action. */
3346
5b9c0671
NC
3347 /* Something changed in %^H, so it will need to be restored on scope exit.
3348 Doing this here saves a lot of doing it manually in perl code (and
3349 forgetting to do it, and consequent subtle errors. */
3350 PL_hints |= HINT_LOCALIZE_HH;
20439bc7
Z
3351 CopHINTHASH_set(&PL_compiling,
3352 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
b3ca2e83
NC
3353 return 0;
3354}
3355
3356/*
f175cff5 3357=for apidoc magic_clearhint
b3ca2e83 3358
c28fe1ec
NC
3359Triggered by a delete from %^H, records the key to
3360C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3361
3362=cut
3363*/
3364int
3365Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3366{
3367 dVAR;
7918f24d
NC
3368
3369 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
f5a63d97
AL
3370 PERL_UNUSED_ARG(sv);
3371
5b9c0671 3372 PL_hints |= HINT_LOCALIZE_HH;
20439bc7 3373 CopHINTHASH_set(&PL_compiling,
e3352591
FC
3374 mg->mg_len == HEf_SVKEY
3375 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3376 MUTABLE_SV(mg->mg_ptr), 0, 0)
3377 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3378 mg->mg_ptr, mg->mg_len, 0, 0));
b3ca2e83
NC
3379 return 0;
3380}
3381
3382/*
f747ebd6
Z
3383=for apidoc magic_clearhints
3384
3385Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3386
3387=cut
3388*/
3389int
3390Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3391{
3392 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3393 PERL_UNUSED_ARG(sv);
3394 PERL_UNUSED_ARG(mg);
20439bc7
Z
3395 cophh_free(CopHINTHASH_get(&PL_compiling));
3396 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
f747ebd6
Z
3397 return 0;
3398}
3399
09fb282d
FC
3400int
3401Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3402 const char *name, I32 namlen)
3403{
3404 MAGIC *nmg;
3405
3406 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
4f8dbb2d 3407 PERL_UNUSED_ARG(sv);
09fb282d
FC
3408 PERL_UNUSED_ARG(name);
3409 PERL_UNUSED_ARG(namlen);
3410
3411 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3412 nmg = mg_find(nsv, mg->mg_type);
3413 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3414 nmg->mg_ptr = mg->mg_ptr;
3415 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3416 nmg->mg_flags |= MGf_REFCOUNTED;
3417 return 1;
3418}
3419
f747ebd6 3420/*
66610fdd
RGS
3421 * Local variables:
3422 * c-indentation-style: bsd
3423 * c-basic-offset: 4
14d04a33 3424 * indent-tabs-mode: nil
66610fdd
RGS
3425 * End:
3426 *
14d04a33 3427 * ex: set ts=8 sts=4 sw=4 et:
37442d52 3428 */