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a0d0e21e 1/* mg.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
b94e2f88 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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/*
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."
79072805
LW
14 */
15
ccfc67b7
JH
16/*
17=head1 Magical Functions
166f8a29
DM
18
19"Magic" is special data attached to SV structures in order to give them
20"magical" properties. When any Perl code tries to read from, or assign to,
21an SV marked as magical, it calls the 'get' or 'set' function associated
22with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 23give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
24number of the last read filehandle into to the SV's IV slot), while
25set is called after an SV has been written to, in order to allow it to make
ddfa107c 26use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
27PL_rs global variable).
28
29Magic is implemented as a linked list of MAGIC structures attached to the
30SV. Each MAGIC struct holds the type of the magic, a pointer to an array
31of functions that implement the get(), set(), length() etc functions,
32plus space for some flags and pointers. For example, a tied variable has
33a MAGIC structure that contains a pointer to the object associated with the
34tie.
35
ccfc67b7
JH
36*/
37
79072805 38#include "EXTERN.h"
864dbfa3 39#define PERL_IN_MG_C
79072805
LW
40#include "perl.h"
41
5cd24f17 42#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
43# ifdef I_GRP
44# include <grp.h>
45# endif
188ea221
CS
46#endif
47
757f63d8
SP
48#if defined(HAS_SETGROUPS)
49# ifndef NGROUPS
50# define NGROUPS 32
51# endif
52#endif
53
17aa7f3d
JH
54#ifdef __hpux
55# include <sys/pstat.h>
56#endif
57
8aad04aa
JH
58#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
59Signal_t Perl_csighandler(int sig, ...);
60#else
e69880a5 61Signal_t Perl_csighandler(int sig);
8aad04aa 62#endif
e69880a5 63
9cffb111
OS
64#ifdef __Lynx__
65/* Missing protos on LynxOS */
66void setruid(uid_t id);
67void seteuid(uid_t id);
68void setrgid(uid_t id);
69void setegid(uid_t id);
70#endif
71
c07a80fd
PP
72/*
73 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
74 */
75
76struct magic_state {
77 SV* mgs_sv;
78 U32 mgs_flags;
455ece5e 79 I32 mgs_ss_ix;
c07a80fd 80};
455ece5e 81/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
82
83STATIC void
8fb26106 84S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 85{
97aff369 86 dVAR;
455ece5e 87 MGS* mgs;
c07a80fd 88 assert(SvMAGICAL(sv));
d8b2590f
NC
89 /* Turning READONLY off for a copy-on-write scalar (including shared
90 hash keys) is a bad idea. */
765f542d 91 if (SvIsCOW(sv))
9a265e59 92 sv_force_normal_flags(sv, 0);
c07a80fd 93
8772537c 94 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
95
96 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd
PP
97 mgs->mgs_sv = sv;
98 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
455ece5e 99 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
c07a80fd
PP
100
101 SvMAGICAL_off(sv);
102 SvREADONLY_off(sv);
c268c2a6 103 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
c07a80fd
PP
104}
105
954c1994
GS
106/*
107=for apidoc mg_magical
108
109Turns on the magical status of an SV. See C<sv_magic>.
110
111=cut
112*/
113
8990e307 114void
864dbfa3 115Perl_mg_magical(pTHX_ SV *sv)
8990e307 116{
e1ec3a88 117 const MAGIC* mg;
96a5add6 118 PERL_UNUSED_CONTEXT;
8990e307 119 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 120 const MGVTBL* const vtbl = mg->mg_virtual;
8990e307 121 if (vtbl) {
2b260de0 122 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
8990e307
LW
123 SvGMAGICAL_on(sv);
124 if (vtbl->svt_set)
125 SvSMAGICAL_on(sv);
2b260de0 126 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
8990e307
LW
127 SvRMAGICAL_on(sv);
128 }
129 }
130}
131
954c1994
GS
132/*
133=for apidoc mg_get
134
135Do magic after a value is retrieved from the SV. See C<sv_magic>.
136
137=cut
138*/
139
79072805 140int
864dbfa3 141Perl_mg_get(pTHX_ SV *sv)
79072805 142{
97aff369 143 dVAR;
35a4481c 144 const I32 mgs_ix = SSNEW(sizeof(MGS));
fe2774ed 145 const bool was_temp = (bool)SvTEMP(sv);
0723351e 146 int have_new = 0;
ff76feab 147 MAGIC *newmg, *head, *cur, *mg;
20135930 148 /* guard against sv having being freed midway by holding a private
6683b158
NC
149 reference. */
150
151 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
152 cause the SV's buffer to get stolen (and maybe other stuff).
153 So restore it.
154 */
46da273f 155 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC
156 if (!was_temp) {
157 SvTEMP_off(sv);
158 }
159
455ece5e 160 save_magic(mgs_ix, sv);
463ee0b2 161
ff76feab
AMS
162 /* We must call svt_get(sv, mg) for each valid entry in the linked
163 list of magic. svt_get() may delete the current entry, add new
164 magic to the head of the list, or upgrade the SV. AMS 20010810 */
165
166 newmg = cur = head = mg = SvMAGIC(sv);
167 while (mg) {
35a4481c 168 const MGVTBL * const vtbl = mg->mg_virtual;
ff76feab 169
2b260de0 170 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 171 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 172
58f82c5c
DM
173 /* guard against magic having been deleted - eg FETCH calling
174 * untie */
175 if (!SvMAGIC(sv))
176 break;
b77f7d40 177
ff76feab
AMS
178 /* Don't restore the flags for this entry if it was deleted. */
179 if (mg->mg_flags & MGf_GSKIP)
180 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
a0d0e21e 181 }
ff76feab
AMS
182
183 mg = mg->mg_moremagic;
184
0723351e 185 if (have_new) {
ff76feab
AMS
186 /* Have we finished with the new entries we saw? Start again
187 where we left off (unless there are more new entries). */
188 if (mg == head) {
0723351e 189 have_new = 0;
ff76feab
AMS
190 mg = cur;
191 head = newmg;
192 }
193 }
194
195 /* Were any new entries added? */
0723351e
NC
196 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
197 have_new = 1;
ff76feab
AMS
198 cur = mg;
199 mg = newmg;
760ac839 200 }
79072805 201 }
463ee0b2 202
8772537c 203 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC
204
205 if (SvREFCNT(sv) == 1) {
206 /* We hold the last reference to this SV, which implies that the
207 SV was deleted as a side effect of the routines we called. */
0c34ef67 208 SvOK_off(sv);
6683b158 209 }
79072805
LW
210 return 0;
211}
212
954c1994
GS
213/*
214=for apidoc mg_set
215
216Do magic after a value is assigned to the SV. See C<sv_magic>.
217
218=cut
219*/
220
79072805 221int
864dbfa3 222Perl_mg_set(pTHX_ SV *sv)
79072805 223{
97aff369 224 dVAR;
35a4481c 225 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 226 MAGIC* mg;
463ee0b2
LW
227 MAGIC* nextmg;
228
455ece5e 229 save_magic(mgs_ix, sv);
463ee0b2
LW
230
231 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 232 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 233 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
234 if (mg->mg_flags & MGf_GSKIP) {
235 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
455ece5e 236 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
a0d0e21e 237 }
2b260de0 238 if (vtbl && vtbl->svt_set)
fc0dc3b3 239 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 240 }
463ee0b2 241
8772537c 242 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
243 return 0;
244}
245
954c1994
GS
246/*
247=for apidoc mg_length
248
249Report on the SV's length. See C<sv_magic>.
250
251=cut
252*/
253
79072805 254U32
864dbfa3 255Perl_mg_length(pTHX_ SV *sv)
79072805 256{
97aff369 257 dVAR;
79072805 258 MAGIC* mg;
463ee0b2 259 STRLEN len;
463ee0b2 260
79072805 261 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 262 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 263 if (vtbl && vtbl->svt_len) {
35a4481c 264 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 265 save_magic(mgs_ix, sv);
a0d0e21e 266 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 267 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 268 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
269 return len;
270 }
271 }
272
35a4481c 273 if (DO_UTF8(sv)) {
10516c54 274 const U8 *s = (U8*)SvPV_const(sv, len);
f5a63d97 275 len = utf8_length(s, s + len);
5636d518
DB
276 }
277 else
10516c54 278 (void)SvPV_const(sv, len);
463ee0b2 279 return len;
79072805
LW
280}
281
8fb26106 282I32
864dbfa3 283Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
284{
285 MAGIC* mg;
ac27b0f5 286
93965878 287 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 288 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 289 if (vtbl && vtbl->svt_len) {
35a4481c
AL
290 const I32 mgs_ix = SSNEW(sizeof(MGS));
291 I32 len;
455ece5e 292 save_magic(mgs_ix, sv);
93965878 293 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 294 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 295 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
296 return len;
297 }
298 }
299
300 switch(SvTYPE(sv)) {
301 case SVt_PVAV:
35a4481c 302 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
93965878
NIS
303 case SVt_PVHV:
304 /* FIXME */
305 default:
cea2e8a9 306 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
307 break;
308 }
309 return 0;
310}
311
954c1994
GS
312/*
313=for apidoc mg_clear
314
315Clear something magical that the SV represents. See C<sv_magic>.
316
317=cut
318*/
319
79072805 320int
864dbfa3 321Perl_mg_clear(pTHX_ SV *sv)
79072805 322{
35a4481c 323 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 324 MAGIC* mg;
463ee0b2 325
455ece5e 326 save_magic(mgs_ix, sv);
463ee0b2 327
79072805 328 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 329 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 330 /* omit GSKIP -- never set here */
727405f8 331
2b260de0 332 if (vtbl && vtbl->svt_clear)
fc0dc3b3 333 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 334 }
463ee0b2 335
8772537c 336 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
337 return 0;
338}
339
954c1994
GS
340/*
341=for apidoc mg_find
342
343Finds the magic pointer for type matching the SV. See C<sv_magic>.
344
345=cut
346*/
347
93a17b20 348MAGIC*
35a4481c 349Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 350{
96a5add6 351 PERL_UNUSED_CONTEXT;
35a4481c
AL
352 if (sv) {
353 MAGIC *mg;
354 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
355 if (mg->mg_type == type)
356 return mg;
357 }
93a17b20 358 }
5f66b61c 359 return NULL;
93a17b20
LW
360}
361
954c1994
GS
362/*
363=for apidoc mg_copy
364
365Copies the magic from one SV to another. See C<sv_magic>.
366
367=cut
368*/
369
79072805 370int
864dbfa3 371Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 372{
463ee0b2 373 int count = 0;
79072805 374 MAGIC* mg;
463ee0b2 375 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 376 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS
377 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
378 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
379 }
823a54a3
AL
380 else {
381 const char type = mg->mg_type;
1e73acc8 382 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
383 sv_magic(nsv,
384 (type == PERL_MAGIC_tied)
385 ? SvTIED_obj(sv, mg)
386 : (type == PERL_MAGIC_regdata && mg->mg_obj)
387 ? sv
388 : mg->mg_obj,
389 toLOWER(type), key, klen);
390 count++;
391 }
79072805 392 }
79072805 393 }
463ee0b2 394 return count;
79072805
LW
395}
396
954c1994 397/*
0cbee0a4
DM
398=for apidoc mg_localize
399
400Copy some of the magic from an existing SV to new localized version of
401that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
402doesn't (eg taint, pos).
403
404=cut
405*/
406
407void
408Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
409{
97aff369 410 dVAR;
0cbee0a4
DM
411 MAGIC *mg;
412 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
92e67595 413 MGVTBL* const vtbl = mg->mg_virtual;
0cbee0a4
DM
414 switch (mg->mg_type) {
415 /* value magic types: don't copy */
416 case PERL_MAGIC_bm:
417 case PERL_MAGIC_fm:
418 case PERL_MAGIC_regex_global:
419 case PERL_MAGIC_nkeys:
420#ifdef USE_LOCALE_COLLATE
421 case PERL_MAGIC_collxfrm:
422#endif
423 case PERL_MAGIC_qr:
424 case PERL_MAGIC_taint:
425 case PERL_MAGIC_vec:
426 case PERL_MAGIC_vstring:
427 case PERL_MAGIC_utf8:
428 case PERL_MAGIC_substr:
429 case PERL_MAGIC_defelem:
430 case PERL_MAGIC_arylen:
431 case PERL_MAGIC_pos:
432 case PERL_MAGIC_backref:
433 case PERL_MAGIC_arylen_p:
434 case PERL_MAGIC_rhash:
435 case PERL_MAGIC_symtab:
436 continue;
437 }
438
a5063e7c
DM
439 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
440 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
441 else
0cbee0a4
DM
442 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
443 mg->mg_ptr, mg->mg_len);
a5063e7c 444
0cbee0a4
DM
445 /* container types should remain read-only across localization */
446 SvFLAGS(nsv) |= SvREADONLY(sv);
447 }
448
449 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
450 SvFLAGS(nsv) |= SvMAGICAL(sv);
451 PL_localizing = 1;
452 SvSETMAGIC(nsv);
453 PL_localizing = 0;
454 }
455}
456
457/*
954c1994
GS
458=for apidoc mg_free
459
460Free any magic storage used by the SV. See C<sv_magic>.
461
462=cut
463*/
464
79072805 465int
864dbfa3 466Perl_mg_free(pTHX_ SV *sv)
79072805
LW
467{
468 MAGIC* mg;
469 MAGIC* moremagic;
470 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 471 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 472 moremagic = mg->mg_moremagic;
2b260de0 473 if (vtbl && vtbl->svt_free)
fc0dc3b3 474 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 475 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 476 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 477 Safefree(mg->mg_ptr);
565764a8 478 else if (mg->mg_len == HEf_SVKEY)
88e89b8a 479 SvREFCNT_dec((SV*)mg->mg_ptr);
d460ef45 480 }
b881518d
JH
481 if (mg->mg_flags & MGf_REFCOUNTED)
482 SvREFCNT_dec(mg->mg_obj);
79072805
LW
483 Safefree(mg);
484 }
b162af07 485 SvMAGIC_set(sv, NULL);
79072805
LW
486 return 0;
487}
488
79072805 489#include <signal.h>
79072805 490
942e002e 491U32
864dbfa3 492Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 493{
97aff369 494 dVAR;
8772537c 495 PERL_UNUSED_ARG(sv);
6cef1e77 496
0bd48802
AL
497 if (PL_curpm) {
498 register const REGEXP * const rx = PM_GETRE(PL_curpm);
499 if (rx) {
500 return mg->mg_obj
501 ? rx->nparens /* @+ */
502 : rx->lastparen; /* @- */
503 }
8f580fb8 504 }
ac27b0f5 505
942e002e 506 return (U32)-1;
6cef1e77
IZ
507}
508
509int
864dbfa3 510Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 511{
97aff369 512 dVAR;
0bd48802
AL
513 if (PL_curpm) {
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
515 if (rx) {
516 register const I32 paren = mg->mg_len;
517 register I32 s;
518 register I32 t;
519 if (paren < 0)
520 return 0;
521 if (paren <= (I32)rx->nparens &&
522 (s = rx->startp[paren]) != -1 &&
523 (t = rx->endp[paren]) != -1)
524 {
525 register I32 i;
526 if (mg->mg_obj) /* @+ */
527 i = t;
528 else /* @- */
529 i = s;
530
531 if (i > 0 && RX_MATCH_UTF8(rx)) {
532 const char * const b = rx->subbeg;
533 if (b)
f5a63d97 534 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 535 }
727405f8 536
0bd48802 537 sv_setiv(sv, i);
1aa99e6b 538 }
0bd48802 539 }
6cef1e77
IZ
540 }
541 return 0;
542}
543
e4b89193 544int
a29d06ed
MG
545Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
546{
d4c19fe8
AL
547 PERL_UNUSED_ARG(sv);
548 PERL_UNUSED_ARG(mg);
a29d06ed 549 Perl_croak(aTHX_ PL_no_modify);
0dbb1585 550 NORETURN_FUNCTION_END;
a29d06ed
MG
551}
552
93a17b20 553U32
864dbfa3 554Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 555{
97aff369 556 dVAR;
93a17b20 557 register I32 paren;
93a17b20 558 register I32 i;
dd374669 559 register const REGEXP *rx;
a197cbdd 560 I32 s1, t1;
93a17b20
LW
561
562 switch (*mg->mg_ptr) {
563 case '1': case '2': case '3': case '4':
564 case '5': case '6': case '7': case '8': case '9': case '&':
aaa362c4 565 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d 566
ffc61ed2 567 paren = atoi(mg->mg_ptr); /* $& is in [0] */
93a17b20 568 getparen:
eb160463 569 if (paren <= (I32)rx->nparens &&
cf93c79d
IZ
570 (s1 = rx->startp[paren]) != -1 &&
571 (t1 = rx->endp[paren]) != -1)
bbce6d69 572 {
cf93c79d 573 i = t1 - s1;
a197cbdd 574 getlen:
a30b2f1f 575 if (i > 0 && RX_MATCH_UTF8(rx)) {
a28509cc 576 const char * const s = rx->subbeg + s1;
768c67ee
JH
577 const U8 *ep;
578 STRLEN el;
ffc61ed2 579
6d5fa195 580 i = t1 - s1;
768c67ee
JH
581 if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
582 i = el;
a197cbdd 583 }
ffc61ed2 584 if (i < 0)
0844c848 585 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 586 return i;
93a17b20 587 }
235bddc8
NIS
588 else {
589 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 590 report_uninit(sv);
235bddc8
NIS
591 }
592 }
593 else {
594 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 595 report_uninit(sv);
93a17b20 596 }
748a9306 597 return 0;
93a17b20 598 case '+':
aaa362c4 599 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 600 paren = rx->lastparen;
13f57bf8
CS
601 if (paren)
602 goto getparen;
93a17b20 603 }
748a9306 604 return 0;
a01268b5
JH
605 case '\016': /* ^N */
606 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
607 paren = rx->lastcloseparen;
608 if (paren)
609 goto getparen;
610 }
611 return 0;
93a17b20 612 case '`':
aaa362c4 613 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
614 if (rx->startp[0] != -1) {
615 i = rx->startp[0];
a197cbdd
GS
616 if (i > 0) {
617 s1 = 0;
618 t1 = i;
619 goto getlen;
620 }
93a17b20 621 }
93a17b20 622 }
748a9306 623 return 0;
93a17b20 624 case '\'':
aaa362c4 625 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
626 if (rx->endp[0] != -1) {
627 i = rx->sublen - rx->endp[0];
a197cbdd
GS
628 if (i > 0) {
629 s1 = rx->endp[0];
630 t1 = rx->sublen;
631 goto getlen;
632 }
93a17b20 633 }
93a17b20 634 }
748a9306 635 return 0;
93a17b20
LW
636 }
637 magic_get(sv,mg);
2d8e6c8d 638 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 639 sv_2pv(sv, 0);
2d8e6c8d 640 }
93a17b20
LW
641 if (SvPOK(sv))
642 return SvCUR(sv);
643 return 0;
644}
645
ad3296c6 646#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
647 if (SvPOK(sv)) { \
648 STRLEN len = SvCUR(sv); \
649 char * const p = SvPVX(sv); \
8e6b4db6
PC
650 while (len > 0 && isSPACE(p[len-1])) \
651 --len; \
652 SvCUR_set(sv, len); \
653 p[len] = '\0'; \
654 } \
ad3296c6
SH
655} STMT_END
656
79072805 657int
864dbfa3 658Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 659{
27da23d5 660 dVAR;
79072805 661 register I32 paren;
35272f84 662 register char *s = NULL;
79072805 663 register I32 i;
d9f97599 664 register REGEXP *rx;
823a54a3
AL
665 const char * const remaining = mg->mg_ptr + 1;
666 const char nextchar = *remaining;
79072805
LW
667
668 switch (*mg->mg_ptr) {
748a9306 669 case '\001': /* ^A */
3280af22 670 sv_setsv(sv, PL_bodytarget);
748a9306 671 break;
e5218da5 672 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 673 if (nextchar == '\0') {
e5218da5
GA
674 sv_setiv(sv, (IV)PL_minus_c);
675 }
823a54a3 676 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
677 sv_setiv(sv, (IV)STATUS_NATIVE);
678 }
49460fe6
NIS
679 break;
680
79072805 681 case '\004': /* ^D */
aea4f609 682 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 683 break;
28f23441 684 case '\005': /* ^E */
823a54a3 685 if (nextchar == '\0') {
4b645107 686#if defined(MACOS_TRADITIONAL)
0a378802
JH
687 {
688 char msg[256];
727405f8 689
0a378802 690 sv_setnv(sv,(double)gMacPerl_OSErr);
727405f8 691 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
0a378802 692 }
4b645107 693#elif defined(VMS)
0a378802
JH
694 {
695# include <descrip.h>
696# include <starlet.h>
697 char msg[255];
698 $DESCRIPTOR(msgdsc,msg);
699 sv_setnv(sv,(NV) vaxc$errno);
700 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
701 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
702 else
c69006e4 703 sv_setpvn(sv,"",0);
0a378802 704 }
4b645107 705#elif defined(OS2)
0a378802
JH
706 if (!(_emx_env & 0x200)) { /* Under DOS */
707 sv_setnv(sv, (NV)errno);
708 sv_setpv(sv, errno ? Strerror(errno) : "");
709 } else {
710 if (errno != errno_isOS2) {
823a54a3 711 const int tmp = _syserrno();
0a378802
JH
712 if (tmp) /* 2nd call to _syserrno() makes it 0 */
713 Perl_rc = tmp;
714 }
715 sv_setnv(sv, (NV)Perl_rc);
716 sv_setpv(sv, os2error(Perl_rc));
717 }
4b645107 718#elif defined(WIN32)
0a378802 719 {
d4c19fe8 720 const DWORD dwErr = GetLastError();
0a378802 721 sv_setnv(sv, (NV)dwErr);
823a54a3 722 if (dwErr) {
0a378802
JH
723 PerlProc_GetOSError(sv, dwErr);
724 }
725 else
c69006e4 726 sv_setpvn(sv, "", 0);
0a378802
JH
727 SetLastError(dwErr);
728 }
22fae026 729#else
f6c8f21d 730 {
8772537c 731 const int saveerrno = errno;
f6c8f21d 732 sv_setnv(sv, (NV)errno);
666ea192 733 sv_setpv(sv, errno ? Strerror(errno) : "");
f6c8f21d
RGS
734 errno = saveerrno;
735 }
28f23441 736#endif
ad3296c6 737 SvRTRIM(sv);
0a378802
JH
738 SvNOK_on(sv); /* what a wonderful hack! */
739 }
823a54a3 740 else if (strEQ(remaining, "NCODING"))
0a378802
JH
741 sv_setsv(sv, PL_encoding);
742 break;
79072805 743 case '\006': /* ^F */
3280af22 744 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 745 break;
a0d0e21e 746 case '\010': /* ^H */
3280af22 747 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 748 break;
9d116dd7 749 case '\011': /* ^I */ /* NOT \t in EBCDIC */
3280af22
NIS
750 if (PL_inplace)
751 sv_setpv(sv, PL_inplace);
79072805 752 else
3280af22 753 sv_setsv(sv, &PL_sv_undef);
79072805 754 break;
ac27b0f5 755 case '\017': /* ^O & ^OPEN */
823a54a3 756 if (nextchar == '\0') {
ac27b0f5 757 sv_setpv(sv, PL_osname);
3511154c
DM
758 SvTAINTED_off(sv);
759 }
823a54a3 760 else if (strEQ(remaining, "PEN")) {
11bcd5da 761 if (!(CopHINTS_get(&PL_compiling) & HINT_LEXICAL_IO))
ac27b0f5
NIS
762 sv_setsv(sv, &PL_sv_undef);
763 else {
11bcd5da
NC
764 sv_setsv(sv,
765 Perl_refcounted_he_fetch(aTHX_
766 PL_compiling.cop_hints_hash,
767 0, "open", 4, 0, 0));
ac27b0f5
NIS
768 }
769 }
28f23441 770 break;
79072805 771 case '\020': /* ^P */
3280af22 772 sv_setiv(sv, (IV)PL_perldb);
79072805 773 break;
fb73857a 774 case '\023': /* ^S */
823a54a3 775 if (nextchar == '\0') {
3280af22 776 if (PL_lex_state != LEX_NOTPARSING)
0c34ef67 777 SvOK_off(sv);
3280af22 778 else if (PL_in_eval)
6dc8a9e4 779 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
780 else
781 sv_setiv(sv, 0);
d58bf5aa 782 }
fb73857a 783 break;
79072805 784 case '\024': /* ^T */
823a54a3 785 if (nextchar == '\0') {
88e89b8a 786#ifdef BIG_TIME
7c36658b 787 sv_setnv(sv, PL_basetime);
88e89b8a 788#else
7c36658b 789 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 790#endif
7c36658b 791 }
823a54a3 792 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
793 sv_setiv(sv, PL_tainting
794 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
795 : 0);
7c36658b 796 break;
e07ea26a 797 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 798 if (strEQ(remaining, "NICODE"))
a05d7ebb 799 sv_setuv(sv, (UV) PL_unicode);
823a54a3 800 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 801 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
802 else if (strEQ(remaining, "TF8CACHE"))
803 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
804 break;
805 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 806 if (nextchar == '\0')
4438c4b7 807 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 808 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 809 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 810 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
811 }
812 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH
813 sv_setpvn(
814 sv,
815 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
816 WARNsize
817 );
013b78e8 818 }
d3a7d8c7 819 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
820 /* Get the bit mask for $warnings::Bits{all}, because
821 * it could have been extended by warnings::register */
823a54a3 822 HV * const bits=get_hv("warnings::Bits", FALSE);
f5a63d97
AL
823 if (bits) {
824 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
825 if (bits_all)
826 sv_setsv(sv, *bits_all);
75b6c4ca
RGS
827 }
828 else {
829 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
830 }
ac27b0f5 831 }
4438c4b7 832 else {
72dc9ed5
NC
833 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
834 *PL_compiling.cop_warnings);
ac27b0f5 835 }
d3a7d8c7 836 SvPOK_only(sv);
4438c4b7 837 }
79072805
LW
838 break;
839 case '1': case '2': case '3': case '4':
840 case '5': case '6': case '7': case '8': case '9': case '&':
aaa362c4 841 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
842 I32 s1, t1;
843
a863c7d1
MB
844 /*
845 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
846 * XXX Does the new way break anything?
847 */
ffc61ed2 848 paren = atoi(mg->mg_ptr); /* $& is in [0] */
79072805 849 getparen:
eb160463 850 if (paren <= (I32)rx->nparens &&
cf93c79d
IZ
851 (s1 = rx->startp[paren]) != -1 &&
852 (t1 = rx->endp[paren]) != -1)
bbce6d69 853 {
cf93c79d
IZ
854 i = t1 - s1;
855 s = rx->subbeg + s1;
c2b4a044 856 assert(rx->subbeg);
c2e66d9e 857
13f57bf8 858 getrx:
748a9306 859 if (i >= 0) {
fabdb6c0 860 const int oldtainted = PL_tainted;
f6ba9920 861 TAINT_NOT;
cf93c79d 862 sv_setpvn(sv, s, i);
f6ba9920 863 PL_tainted = oldtainted;
a30b2f1f 864 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
7e2040f0
GS
865 SvUTF8_on(sv);
866 else
867 SvUTF8_off(sv);
e9814ee1
HS
868 if (PL_tainting) {
869 if (RX_MATCH_TAINTED(rx)) {
823a54a3 870 MAGIC* const mg = SvMAGIC(sv);
e9814ee1
HS
871 MAGIC* mgt;
872 PL_tainted = 1;
b162af07 873 SvMAGIC_set(sv, mg->mg_moremagic);
e9814ee1
HS
874 SvTAINT(sv);
875 if ((mgt = SvMAGIC(sv))) {
876 mg->mg_moremagic = mgt;
b162af07 877 SvMAGIC_set(sv, mg);
e9814ee1
HS
878 }
879 } else
880 SvTAINTED_off(sv);
881 }
748a9306
LW
882 break;
883 }
79072805 884 }
79072805 885 }
3280af22 886 sv_setsv(sv,&PL_sv_undef);
79072805
LW
887 break;
888 case '+':
aaa362c4 889 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 890 paren = rx->lastparen;
a0d0e21e
LW
891 if (paren)
892 goto getparen;
79072805 893 }
3280af22 894 sv_setsv(sv,&PL_sv_undef);
79072805 895 break;
a01268b5
JH
896 case '\016': /* ^N */
897 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
898 paren = rx->lastcloseparen;
899 if (paren)
900 goto getparen;
901 }
902 sv_setsv(sv,&PL_sv_undef);
903 break;
79072805 904 case '`':
aaa362c4 905 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
906 if ((s = rx->subbeg) && rx->startp[0] != -1) {
907 i = rx->startp[0];
13f57bf8 908 goto getrx;
79072805 909 }
79072805 910 }
3280af22 911 sv_setsv(sv,&PL_sv_undef);
79072805
LW
912 break;
913 case '\'':
aaa362c4 914 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
915 if (rx->subbeg && rx->endp[0] != -1) {
916 s = rx->subbeg + rx->endp[0];
917 i = rx->sublen - rx->endp[0];
13f57bf8 918 goto getrx;
79072805 919 }
79072805 920 }
3280af22 921 sv_setsv(sv,&PL_sv_undef);
79072805
LW
922 break;
923 case '.':
3280af22 924 if (GvIO(PL_last_in_gv)) {
357c8808 925 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 926 }
79072805
LW
927 break;
928 case '?':
809a5acc 929 {
809a5acc 930 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 931#ifdef COMPLEX_STATUS
6b88bc9c
GS
932 LvTARGOFF(sv) = PL_statusvalue;
933 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 934#endif
809a5acc 935 }
79072805
LW
936 break;
937 case '^':
0daa599b
RGS
938 if (GvIOp(PL_defoutgv))
939 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
940 if (s)
941 sv_setpv(sv,s);
942 else {
3280af22 943 sv_setpv(sv,GvENAME(PL_defoutgv));
79072805
LW
944 sv_catpv(sv,"_TOP");
945 }
946 break;
947 case '~':
0daa599b
RGS
948 if (GvIOp(PL_defoutgv))
949 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 950 if (!s)
3280af22 951 s = GvENAME(PL_defoutgv);
79072805
LW
952 sv_setpv(sv,s);
953 break;
79072805 954 case '=':
0daa599b
RGS
955 if (GvIOp(PL_defoutgv))
956 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
957 break;
958 case '-':
0daa599b
RGS
959 if (GvIOp(PL_defoutgv))
960 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
961 break;
962 case '%':
0daa599b
RGS
963 if (GvIOp(PL_defoutgv))
964 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 965 break;
79072805
LW
966 case ':':
967 break;
968 case '/':
969 break;
970 case '[':
11206fdd 971 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW
972 break;
973 case '|':
0daa599b
RGS
974 if (GvIOp(PL_defoutgv))
975 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
976 break;
977 case ',':
79072805
LW
978 break;
979 case '\\':
b2ce0fda 980 if (PL_ors_sv)
f28098ff 981 sv_copypv(sv, PL_ors_sv);
79072805 982 break;
79072805 983 case '!':
a5f75d66 984#ifdef VMS
65202027 985 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 986 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 987#else
88e89b8a 988 {
8772537c 989 const int saveerrno = errno;
65202027 990 sv_setnv(sv, (NV)errno);
88e89b8a 991#ifdef OS2
ed344e4f
IZ
992 if (errno == errno_isOS2 || errno == errno_isOS2_set)
993 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 994 else
a5f75d66 995#endif
666ea192 996 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
997 errno = saveerrno;
998 }
999#endif
ad3296c6 1000 SvRTRIM(sv);
946ec16e 1001 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1002 break;
1003 case '<':
3280af22 1004 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1005 break;
1006 case '>':
3280af22 1007 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1008 break;
1009 case '(':
3280af22 1010 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1011 goto add_groups;
1012 case ')':
3280af22 1013 sv_setiv(sv, (IV)PL_egid);
79072805 1014 add_groups:
79072805 1015#ifdef HAS_GETGROUPS
79072805 1016 {
57d7c65e 1017 Groups_t *gary = NULL;
fb45abb2 1018 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1019 Newx(gary, num_groups, Groups_t);
1020 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1021 for (i = 0; i < num_groups; i++)
1022 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1023 Safefree(gary);
79072805 1024 }
155aba94 1025 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1026#endif
79072805 1027 break;
cd39f2b6 1028#ifndef MACOS_TRADITIONAL
79072805
LW
1029 case '0':
1030 break;
cd39f2b6 1031#endif
79072805 1032 }
a0d0e21e 1033 return 0;
79072805
LW
1034}
1035
1036int
864dbfa3 1037Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1038{
8772537c 1039 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1040
1041 if (uf && uf->uf_val)
24f81a43 1042 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1043 return 0;
1044}
1045
1046int
864dbfa3 1047Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1048{
27da23d5 1049 dVAR;
9ae3433d 1050 STRLEN len = 0, klen;
666ea192 1051 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1052 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1053 my_setenv(ptr, s);
1e422769 1054
a0d0e21e
LW
1055#ifdef DYNAMIC_ENV_FETCH
1056 /* We just undefd an environment var. Is a replacement */
1057 /* waiting in the wings? */
1058 if (!len) {
fabdb6c0
AL
1059 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1060 if (valp)
4ab59fcc 1061 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1062 }
1063#endif
1e422769 1064
39e571d4 1065#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1066 /* And you'll never guess what the dog had */
1067 /* in its mouth... */
3280af22 1068 if (PL_tainting) {
1e422769
PP
1069 MgTAINTEDDIR_off(mg);
1070#ifdef VMS
5aabfad6 1071 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1072 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1073 Stat_t sbuf;
1e422769
PP
1074 int i = 0, j = 0;
1075
6fca0082 1076 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1077 elt = eltbuf;
1e422769
PP
1078 do { /* DCL$PATH may be a search list */
1079 while (1) { /* as may dev portion of any element */
1080 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1081 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1082 cando_by_name(S_IWUSR,0,elt) ) {
1083 MgTAINTEDDIR_on(mg);
1084 return 0;
1085 }
1086 }
bd61b366 1087 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1088 *cp = '\0';
1089 if (my_trnlnm(elt, eltbuf, j++))
1090 elt = eltbuf;
1091 else
1092 break;
1093 }
1094 j = 0;
1095 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1096 }
1097#endif /* VMS */
5aabfad6 1098 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1099 const char * const strend = s + len;
463ee0b2
LW
1100
1101 while (s < strend) {
96827780 1102 char tmpbuf[256];
c623ac67 1103 Stat_t st;
5f74f29c 1104 I32 i;
f5a63d97
AL
1105#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1106 const char path_sep = '|';
1107#else
1108 const char path_sep = ':';
1109#endif
96827780 1110 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1111 s, strend, path_sep, &i);
463ee0b2 1112 s++;
bb7a0f54 1113 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1114#ifdef VMS
1115 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1116#else
1117 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1118#endif
c6ed36e1 1119 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1120 MgTAINTEDDIR_on(mg);
1e422769
PP
1121 return 0;
1122 }
463ee0b2 1123 }
79072805
LW
1124 }
1125 }
39e571d4 1126#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1127
79072805
LW
1128 return 0;
1129}
1130
1131int
864dbfa3 1132Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1133{
8772537c 1134 PERL_UNUSED_ARG(sv);
bd61b366 1135 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1136 return 0;
1137}
1138
88e89b8a 1139int
864dbfa3 1140Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1141{
97aff369 1142 dVAR;
65e66c80 1143 PERL_UNUSED_ARG(mg);
b0269e46 1144#if defined(VMS)
cea2e8a9 1145 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1146#else
3280af22 1147 if (PL_localizing) {
fb73857a 1148 HE* entry;
b0269e46 1149 my_clearenv();
fb73857a 1150 hv_iterinit((HV*)sv);
155aba94 1151 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1152 I32 keylen;
1153 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1154 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1155 }
1156 }
1157#endif
1158 return 0;
1159}
1160
1161int
864dbfa3 1162Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1163{
27da23d5 1164 dVAR;
8772537c
AL
1165 PERL_UNUSED_ARG(sv);
1166 PERL_UNUSED_ARG(mg);
b0269e46
AB
1167#if defined(VMS)
1168 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1169#else
1170 my_clearenv();
1171#endif
3e3baf6d 1172 return 0;
66b1d557
HM
1173}
1174
64ca3a65 1175#ifndef PERL_MICRO
2d4fcd5e
AJ
1176#ifdef HAS_SIGPROCMASK
1177static void
1178restore_sigmask(pTHX_ SV *save_sv)
1179{
0bd48802 1180 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1181 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1182}
1183#endif
66b1d557 1184int
864dbfa3 1185Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1186{
97aff369 1187 dVAR;
88e89b8a 1188 /* Are we fetching a signal entry? */
8772537c 1189 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1190 if (i > 0) {
22c35a8c
GS
1191 if(PL_psig_ptr[i])
1192 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1193 else {
46da273f 1194 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1195#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1196 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1197 sigstate = SIG_IGN;
2e34cc90
CL
1198#endif
1199#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1200 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1201 sigstate = SIG_DFL;
85b332e2 1202#endif
88e89b8a 1203 /* cache state so we don't fetch it again */
8aad04aa 1204 if(sigstate == (Sighandler_t) SIG_IGN)
88e89b8a
PP
1205 sv_setpv(sv,"IGNORE");
1206 else
3280af22 1207 sv_setsv(sv,&PL_sv_undef);
46da273f 1208 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1209 SvTEMP_off(sv);
1210 }
1211 }
1212 return 0;
1213}
1214int
864dbfa3 1215Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1216{
2d4fcd5e
AJ
1217 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1218 * refactoring might be in order.
1219 */
27da23d5 1220 dVAR;
8772537c
AL
1221 register const char * const s = MgPV_nolen_const(mg);
1222 PERL_UNUSED_ARG(sv);
2d4fcd5e 1223 if (*s == '_') {
cbbf8932 1224 SV** svp = NULL;
2d4fcd5e
AJ
1225 if (strEQ(s,"__DIE__"))
1226 svp = &PL_diehook;
b274dc4e 1227 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
2d4fcd5e 1228 svp = &PL_warnhook;
27da23d5 1229 if (svp && *svp) {
b274dc4e 1230 SV *const to_dec = *svp;
cbbf8932 1231 *svp = NULL;
b274dc4e 1232 SvREFCNT_dec(to_dec);
2d4fcd5e
AJ
1233 }
1234 }
1235 else {
2d4fcd5e 1236 /* Are we clearing a signal entry? */
8772537c 1237 const I32 i = whichsig(s);
e02bfb16 1238 if (i > 0) {
2d4fcd5e
AJ
1239#ifdef HAS_SIGPROCMASK
1240 sigset_t set, save;
1241 SV* save_sv;
1242 /* Avoid having the signal arrive at a bad time, if possible. */
1243 sigemptyset(&set);
1244 sigaddset(&set,i);
1245 sigprocmask(SIG_BLOCK, &set, &save);
1246 ENTER;
1247 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1248 SAVEFREESV(save_sv);
1249 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1250#endif
1251 PERL_ASYNC_CHECK();
1252#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1253 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1254#endif
1255#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1256 PL_sig_defaulting[i] = 1;
5c1546dc 1257 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1258#else
8aad04aa 1259 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1260#endif
1261 if(PL_psig_name[i]) {
1262 SvREFCNT_dec(PL_psig_name[i]);
1263 PL_psig_name[i]=0;
1264 }
1265 if(PL_psig_ptr[i]) {
6136c704 1266 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1267 PL_psig_ptr[i]=0;
1268 LEAVE;
1269 SvREFCNT_dec(to_dec);
1270 }
1271 else
1272 LEAVE;
1273 }
88e89b8a
PP
1274 }
1275 return 0;
1276}
3d37d572 1277
dd374669
AL
1278static void
1279S_raise_signal(pTHX_ int sig)
0a8e0eff 1280{
97aff369 1281 dVAR;
0a8e0eff
NIS
1282 /* Set a flag to say this signal is pending */
1283 PL_psig_pend[sig]++;
1284 /* And one to say _a_ signal is pending */
1285 PL_sig_pending = 1;
1286}
1287
1288Signal_t
8aad04aa
JH
1289#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1290Perl_csighandler(int sig, ...)
1291#else
0a8e0eff 1292Perl_csighandler(int sig)
8aad04aa 1293#endif
0a8e0eff 1294{
1018e26f
NIS
1295#ifdef PERL_GET_SIG_CONTEXT
1296 dTHXa(PERL_GET_SIG_CONTEXT);
1297#else
85b332e2
CL
1298 dTHX;
1299#endif
23ada85b 1300#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1301 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1302 if (PL_sig_ignoring[sig]) return;
85b332e2 1303#endif
2e34cc90 1304#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1305 if (PL_sig_defaulting[sig])
2e34cc90
CL
1306#ifdef KILL_BY_SIGPRC
1307 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1308#else
1309 exit(1);
1310#endif
1311#endif
4ffa73a3
JH
1312 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1313 /* Call the perl level handler now--
1314 * with risk we may be in malloc() etc. */
1315 (*PL_sighandlerp)(sig);
1316 else
dd374669 1317 S_raise_signal(aTHX_ sig);
0a8e0eff
NIS
1318}
1319
2e34cc90
CL
1320#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1321void
1322Perl_csighandler_init(void)
1323{
1324 int sig;
27da23d5 1325 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1326
1327 for (sig = 1; sig < SIG_SIZE; sig++) {
1328#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1329 dTHX;
27da23d5 1330 PL_sig_defaulting[sig] = 1;
5c1546dc 1331 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1332#endif
1333#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1334 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1335#endif
1336 }
27da23d5 1337 PL_sig_handlers_initted = 1;
2e34cc90
CL
1338}
1339#endif
1340
0a8e0eff
NIS
1341void
1342Perl_despatch_signals(pTHX)
1343{
97aff369 1344 dVAR;
0a8e0eff
NIS
1345 int sig;
1346 PL_sig_pending = 0;
1347 for (sig = 1; sig < SIG_SIZE; sig++) {
1348 if (PL_psig_pend[sig]) {
25da4428
JH
1349 PERL_BLOCKSIG_ADD(set, sig);
1350 PL_psig_pend[sig] = 0;
1351 PERL_BLOCKSIG_BLOCK(set);
f5203343 1352 (*PL_sighandlerp)(sig);
25da4428 1353 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1354 }
1355 }
1356}
1357
85e6fe83 1358int
864dbfa3 1359Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1360{
27da23d5 1361 dVAR;
79072805 1362 I32 i;
cbbf8932 1363 SV** svp = NULL;
2d4fcd5e
AJ
1364 /* Need to be careful with SvREFCNT_dec(), because that can have side
1365 * effects (due to closures). We must make sure that the new disposition
1366 * is in place before it is called.
1367 */
cbbf8932 1368 SV* to_dec = NULL;
e72dc28c 1369 STRLEN len;
2d4fcd5e
AJ
1370#ifdef HAS_SIGPROCMASK
1371 sigset_t set, save;
1372 SV* save_sv;
1373#endif
a0d0e21e 1374
d5263905 1375 register const char *s = MgPV_const(mg,len);
748a9306
LW
1376 if (*s == '_') {
1377 if (strEQ(s,"__DIE__"))
3280af22 1378 svp = &PL_diehook;
748a9306 1379 else if (strEQ(s,"__WARN__"))
3280af22 1380 svp = &PL_warnhook;
748a9306 1381 else
cea2e8a9 1382 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1383 i = 0;
4633a7c4 1384 if (*svp) {
9289f461
RGS
1385 if (*svp != PERL_WARNHOOK_FATAL)
1386 to_dec = *svp;
cbbf8932 1387 *svp = NULL;
4633a7c4 1388 }
748a9306
LW
1389 }
1390 else {
1391 i = whichsig(s); /* ...no, a brick */
86d86cad 1392 if (i <= 0) {
e476b1b5 1393 if (ckWARN(WARN_SIGNAL))
9014280d 1394 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1395 return 0;
1396 }
2d4fcd5e
AJ
1397#ifdef HAS_SIGPROCMASK
1398 /* Avoid having the signal arrive at a bad time, if possible. */
1399 sigemptyset(&set);
1400 sigaddset(&set,i);
1401 sigprocmask(SIG_BLOCK, &set, &save);
1402 ENTER;
1403 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1404 SAVEFREESV(save_sv);
1405 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1406#endif
1407 PERL_ASYNC_CHECK();
2e34cc90 1408#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1409 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1410#endif
23ada85b 1411#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1412 PL_sig_ignoring[i] = 0;
85b332e2 1413#endif
2e34cc90 1414#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1415 PL_sig_defaulting[i] = 0;
2e34cc90 1416#endif
22c35a8c 1417 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1418 to_dec = PL_psig_ptr[i];
46da273f 1419 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1420 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1421 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1422 SvREADONLY_on(PL_psig_name[i]);
748a9306 1423 }
a0d0e21e 1424 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1425 if (i) {
5c1546dc 1426 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1427#ifdef HAS_SIGPROCMASK
1428 LEAVE;
1429#endif
1430 }
748a9306 1431 else
b37c2d43 1432 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1433 if(to_dec)
1434 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1435 return 0;
1436 }
e72dc28c 1437 s = SvPV_force(sv,len);
748a9306 1438 if (strEQ(s,"IGNORE")) {
85b332e2 1439 if (i) {
23ada85b 1440#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1441 PL_sig_ignoring[i] = 1;
5c1546dc 1442 (void)rsignal(i, PL_csighandlerp);
85b332e2 1443#else
8aad04aa 1444 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1445#endif
2d4fcd5e 1446 }
748a9306
LW
1447 }
1448 else if (strEQ(s,"DEFAULT") || !*s) {
1449 if (i)
2e34cc90
CL
1450#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1451 {
27da23d5 1452 PL_sig_defaulting[i] = 1;
5c1546dc 1453 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1454 }
1455#else
8aad04aa 1456 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1457#endif
748a9306 1458 }
79072805 1459 else {
5aabfad6
PP
1460 /*
1461 * We should warn if HINT_STRICT_REFS, but without
1462 * access to a known hint bit in a known OP, we can't
1463 * tell whether HINT_STRICT_REFS is in force or not.
1464 */
46fc3d4c 1465 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1466 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1467 if (i)
5c1546dc 1468 (void)rsignal(i, PL_csighandlerp);
748a9306 1469 else
46da273f 1470 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1471 }
2d4fcd5e
AJ
1472#ifdef HAS_SIGPROCMASK
1473 if(i)
1474 LEAVE;
1475#endif
1476 if(to_dec)
1477 SvREFCNT_dec(to_dec);
79072805
LW
1478 return 0;
1479}
64ca3a65 1480#endif /* !PERL_MICRO */
79072805
LW
1481
1482int
864dbfa3 1483Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1484{
97aff369 1485 dVAR;
8772537c
AL
1486 PERL_UNUSED_ARG(sv);
1487 PERL_UNUSED_ARG(mg);
3280af22 1488 PL_sub_generation++;
463ee0b2
LW
1489 return 0;
1490}
1491
1492int
864dbfa3 1493Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1494{
97aff369 1495 dVAR;
8772537c
AL
1496 PERL_UNUSED_ARG(sv);
1497 PERL_UNUSED_ARG(mg);
a0d0e21e 1498 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
3280af22 1499 PL_amagic_generation++;
463ee0b2 1500
a0d0e21e
LW
1501 return 0;
1502}
463ee0b2 1503
946ec16e 1504int
864dbfa3 1505Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1506{
dd374669 1507 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1508 I32 i = 0;
8772537c 1509 PERL_UNUSED_ARG(mg);
7719e241 1510
6ff81951 1511 if (hv) {
497b47a8
JH
1512 (void) hv_iterinit(hv);
1513 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1514 i = HvKEYS(hv);
1515 else {
1516 while (hv_iternext(hv))
1517 i++;
1518 }
6ff81951
GS
1519 }
1520
1521 sv_setiv(sv, (IV)i);
1522 return 0;
1523}
1524
1525int
864dbfa3 1526Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1527{
8772537c 1528 PERL_UNUSED_ARG(mg);
946ec16e
PP
1529 if (LvTARG(sv)) {
1530 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1531 }
1532 return 0;
ac27b0f5 1533}
946ec16e 1534
e336de0d 1535/* caller is responsible for stack switching/cleanup */
565764a8 1536STATIC int
e1ec3a88 1537S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1538{
97aff369 1539 dVAR;
a0d0e21e 1540 dSP;
463ee0b2 1541
924508f0
GS
1542 PUSHMARK(SP);
1543 EXTEND(SP, n);
33c27489 1544 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1545 if (n > 1) {
93965878 1546 if (mg->mg_ptr) {
565764a8 1547 if (mg->mg_len >= 0)
79cb57f6 1548 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1549 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1550 PUSHs((SV*)mg->mg_ptr);
1551 }
14befaf4 1552 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1553 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1554 }
1555 }
1556 if (n > 2) {
1557 PUSHs(val);
88e89b8a 1558 }
463ee0b2
LW
1559 PUTBACK;
1560
864dbfa3 1561 return call_method(meth, flags);
946ec16e
PP
1562}
1563
76e3520e 1564STATIC int
e1ec3a88 1565S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1566{
27da23d5 1567 dVAR; dSP;
463ee0b2 1568
a0d0e21e
LW
1569 ENTER;
1570 SAVETMPS;
e788e7d3 1571 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1572
33c27489 1573 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1574 sv_setsv(sv, *PL_stack_sp--);
93965878 1575 }
463ee0b2 1576
d3acc0f7 1577 POPSTACK;
a0d0e21e
LW
1578 FREETMPS;
1579 LEAVE;
1580 return 0;
1581}
463ee0b2 1582
a0d0e21e 1583int
864dbfa3 1584Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1585{
a0d0e21e
LW
1586 if (mg->mg_ptr)
1587 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1588 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1589 return 0;
1590}
1591
1592int
864dbfa3 1593Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1594{
27da23d5 1595 dVAR; dSP;
a60c0954 1596 ENTER;
e788e7d3 1597 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1598 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1599 POPSTACK;
a60c0954 1600 LEAVE;
463ee0b2
LW
1601 return 0;
1602}
1603
1604int
864dbfa3 1605Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1606{
a0d0e21e
LW
1607 return magic_methpack(sv,mg,"DELETE");
1608}
463ee0b2 1609
93965878
NIS
1610
1611U32
864dbfa3 1612Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1613{
27da23d5 1614 dVAR; dSP;
93965878
NIS
1615 U32 retval = 0;
1616
1617 ENTER;
1618 SAVETMPS;
e788e7d3 1619 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1620 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1621 sv = *PL_stack_sp--;
a60c0954 1622 retval = (U32) SvIV(sv)-1;
93965878 1623 }
d3acc0f7 1624 POPSTACK;
93965878
NIS
1625 FREETMPS;
1626 LEAVE;
1627 return retval;
1628}
1629
cea2e8a9
GS
1630int
1631Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1632{
27da23d5 1633 dVAR; dSP;
463ee0b2 1634
e336de0d 1635 ENTER;
e788e7d3 1636 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1637 PUSHMARK(SP);
33c27489 1638 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1639 PUTBACK;
864dbfa3 1640 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1641 POPSTACK;
a60c0954 1642 LEAVE;
a3bcc51e 1643
463ee0b2
LW
1644 return 0;
1645}
1646
1647int
864dbfa3 1648Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1649{
27da23d5 1650 dVAR; dSP;
666ea192 1651 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1652
1653 ENTER;
a0d0e21e 1654 SAVETMPS;
e788e7d3 1655 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1656 PUSHMARK(SP);
1657 EXTEND(SP, 2);
33c27489 1658 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1659 if (SvOK(key))
1660 PUSHs(key);
1661 PUTBACK;
1662
864dbfa3 1663 if (call_method(meth, G_SCALAR))
3280af22 1664 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1665
d3acc0f7 1666 POPSTACK;
a0d0e21e
LW
1667 FREETMPS;
1668 LEAVE;
79072805
LW
1669 return 0;
1670}
1671
1672int
1146e912 1673Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1674{
1675 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1676}
a0d0e21e 1677
a3bcc51e
TP
1678SV *
1679Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1680{
27da23d5 1681 dVAR; dSP;
5fcbf73d 1682 SV *retval;
8772537c
AL
1683 SV * const tied = SvTIED_obj((SV*)hv, mg);
1684 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1685
1686 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1687 SV *key;
bfcb3514 1688 if (HvEITER_get(hv))
a3bcc51e
TP
1689 /* we are in an iteration so the hash cannot be empty */
1690 return &PL_sv_yes;
1691 /* no xhv_eiter so now use FIRSTKEY */
1692 key = sv_newmortal();
1693 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1694 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1695 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1696 }
1697
1698 /* there is a SCALAR method that we can call */
1699 ENTER;
1700 PUSHSTACKi(PERLSI_MAGIC);
1701 PUSHMARK(SP);
1702 EXTEND(SP, 1);
1703 PUSHs(tied);
1704 PUTBACK;
1705
1706 if (call_method("SCALAR", G_SCALAR))
1707 retval = *PL_stack_sp--;
5fcbf73d
AL
1708 else
1709 retval = &PL_sv_undef;
a3bcc51e
TP
1710 POPSTACK;
1711 LEAVE;
1712 return retval;
1713}
1714
a0d0e21e 1715int
864dbfa3 1716Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1717{
97aff369 1718 dVAR;
8772537c
AL
1719 GV * const gv = PL_DBline;
1720 const I32 i = SvTRUE(sv);
1721 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1722 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1723 if (svp && SvIOKp(*svp)) {
1724 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1725 if (o) {
1726 /* set or clear breakpoint in the relevant control op */
1727 if (i)
1728 o->op_flags |= OPf_SPECIAL;
1729 else
1730 o->op_flags &= ~OPf_SPECIAL;
1731 }
5df8de69 1732 }
79072805
LW
1733 return 0;
1734}
1735
1736int
8772537c 1737Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1738{
97aff369 1739 dVAR;
8772537c 1740 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1741 if (obj) {
fc15ae8f 1742 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1743 } else {
1744 SvOK_off(sv);
1745 }
79072805
LW
1746 return 0;
1747}
1748
1749int
864dbfa3 1750Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1751{
97aff369 1752 dVAR;
8772537c 1753 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1754 if (obj) {
fc15ae8f 1755 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1756 } else {
1757 if (ckWARN(WARN_MISC))
1758 Perl_warner(aTHX_ packWARN(WARN_MISC),
1759 "Attempt to set length of freed array");
1760 }
1761 return 0;
1762}
1763
1764int
1765Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1766{
97aff369 1767 dVAR;
53c1dcc0 1768 PERL_UNUSED_ARG(sv);
94f3782b
DM
1769 /* during global destruction, mg_obj may already have been freed */
1770 if (PL_in_clean_all)
1ea47f64 1771 return 0;
94f3782b 1772
83bf042f
NC
1773 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1774
1775 if (mg) {
1776 /* arylen scalar holds a pointer back to the array, but doesn't own a
1777 reference. Hence the we (the array) are about to go away with it
1778 still pointing at us. Clear its pointer, else it would be pointing
1779 at free memory. See the comment in sv_magic about reference loops,
1780 and why it can't own a reference to us. */
1781 mg->mg_obj = 0;
1782 }
a0d0e21e
LW
1783 return 0;
1784}
1785
1786int
864dbfa3 1787Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1788{
97aff369 1789 dVAR;
8772537c 1790 SV* const lsv = LvTARG(sv);
3881461a 1791 PERL_UNUSED_ARG(mg);
ac27b0f5 1792
a0d0e21e 1793 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1794 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1795 if (found && found->mg_len >= 0) {
1796 I32 i = found->mg_len;
7e2040f0 1797 if (DO_UTF8(lsv))
a0ed51b3 1798 sv_pos_b2u(lsv, &i);
fc15ae8f 1799 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1800 return 0;
1801 }
1802 }
0c34ef67 1803 SvOK_off(sv);
a0d0e21e
LW
1804 return 0;
1805}
1806
1807int
864dbfa3 1808Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1809{
97aff369 1810 dVAR;
8772537c 1811 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1812 SSize_t pos;
1813 STRLEN len;
c00206c8 1814 STRLEN ulen = 0;
3881461a 1815 MAGIC *found;
a0d0e21e 1816
3881461a 1817 PERL_UNUSED_ARG(mg);
ac27b0f5 1818
a0d0e21e 1819 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1820 found = mg_find(lsv, PERL_MAGIC_regex_global);
1821 else
1822 found = NULL;
1823 if (!found) {
a0d0e21e
LW
1824 if (!SvOK(sv))
1825 return 0;
d83f0a82
NC
1826#ifdef PERL_OLD_COPY_ON_WRITE
1827 if (SvIsCOW(lsv))
1828 sv_force_normal_flags(lsv, 0);
1829#endif
3881461a 1830 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
d83f0a82 1831 NULL, 0);
a0d0e21e
LW
1832 }
1833 else if (!SvOK(sv)) {
3881461a 1834 found->mg_len = -1;
a0d0e21e
LW
1835 return 0;
1836 }
1837 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1838
fc15ae8f 1839 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1840
7e2040f0 1841 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1842 ulen = sv_len_utf8(lsv);
1843 if (ulen)
1844 len = ulen;
a0ed51b3
LW
1845 }
1846
a0d0e21e
LW
1847 if (pos < 0) {
1848 pos += len;
1849 if (pos < 0)
1850 pos = 0;
1851 }
eb160463 1852 else if (pos > (SSize_t)len)
a0d0e21e 1853 pos = len;
a0ed51b3
LW
1854
1855 if (ulen) {
1856 I32 p = pos;
1857 sv_pos_u2b(lsv, &p, 0);
1858 pos = p;
1859 }
727405f8 1860
3881461a
AL
1861 found->mg_len = pos;
1862 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1863
79072805
LW
1864 return 0;
1865}
1866
1867int
864dbfa3 1868Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1869{
79072805 1870 GV* gv;
8772537c
AL
1871 PERL_UNUSED_ARG(mg);
1872
79072805
LW
1873 if (!SvOK(sv))
1874 return 0;
180488f8
NC
1875 if (SvFLAGS(sv) & SVp_SCREAM
1876 && (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVGV)) {
1877 /* We're actually already a typeglob, so don't need the stuff below.
1878 */
1879 return 0;
1880 }
f776e3cd 1881 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1882 if (sv == (SV*)gv)
1883 return 0;
1884 if (GvGP(sv))
88e89b8a 1885 gp_free((GV*)sv);
79072805 1886 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1887 return 0;
1888}
1889
1890int
864dbfa3 1891Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1892{
1893 STRLEN len;
35a4481c 1894 SV * const lsv = LvTARG(sv);
b83604b4 1895 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1896 I32 offs = LvTARGOFF(sv);
1897 I32 rem = LvTARGLEN(sv);
8772537c 1898 PERL_UNUSED_ARG(mg);
6ff81951 1899
9aa983d2
JH
1900 if (SvUTF8(lsv))
1901 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1902 if (offs > (I32)len)
6ff81951 1903 offs = len;
eb160463 1904 if (rem + offs > (I32)len)
6ff81951
GS
1905 rem = len - offs;
1906 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1907 if (SvUTF8(lsv))
2ef4b674 1908 SvUTF8_on(sv);
6ff81951
GS
1909 return 0;
1910}
1911
1912int
864dbfa3 1913Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1914{
97aff369 1915 dVAR;
9aa983d2 1916 STRLEN len;
5fcbf73d 1917 const char * const tmps = SvPV_const(sv, len);
dd374669 1918 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1919 I32 lvoff = LvTARGOFF(sv);
1920 I32 lvlen = LvTARGLEN(sv);
8772537c 1921 PERL_UNUSED_ARG(mg);
075a4a2b 1922
1aa99e6b 1923 if (DO_UTF8(sv)) {
9aa983d2
JH
1924 sv_utf8_upgrade(lsv);
1925 sv_pos_u2b(lsv, &lvoff, &lvlen);
1926 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1927 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1928 SvUTF8_on(lsv);
1929 }
9bf12eaf 1930 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1931 const char *utf8;
9aa983d2 1932 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1933 LvTARGLEN(sv) = len;
5fcbf73d
AL
1934 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1935 sv_insert(lsv, lvoff, lvlen, utf8, len);
1936 Safefree(utf8);
1aa99e6b 1937 }
b76f3ce2
GB
1938 else {
1939 sv_insert(lsv, lvoff, lvlen, tmps, len);
1940 LvTARGLEN(sv) = len;
1941 }
1942
1aa99e6b 1943
79072805
LW
1944 return 0;
1945}
1946
1947int
864dbfa3 1948Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1949{
97aff369 1950 dVAR;
8772537c 1951 PERL_UNUSED_ARG(sv);
27cc343c 1952 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
1953 return 0;
1954}
1955
1956int
864dbfa3 1957Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1958{
97aff369 1959 dVAR;
8772537c 1960 PERL_UNUSED_ARG(sv);
0a9c116b
DM
1961 /* update taint status unless we're restoring at scope exit */
1962 if (PL_localizing != 2) {
1963 if (PL_tainted)
1964 mg->mg_len |= 1;
1965 else
1966 mg->mg_len &= ~1;
1967 }
463ee0b2
LW
1968 return 0;
1969}
1970
1971int
864dbfa3 1972Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1973{
35a4481c 1974 SV * const lsv = LvTARG(sv);
8772537c 1975 PERL_UNUSED_ARG(mg);
6ff81951 1976
6136c704
AL
1977 if (lsv)
1978 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1979 else
0c34ef67 1980 SvOK_off(sv);
6ff81951 1981
6ff81951
GS
1982 return 0;
1983}
1984
1985int
864dbfa3 1986Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 1987{
8772537c 1988 PERL_UNUSED_ARG(mg);
79072805
LW
1989 do_vecset(sv); /* XXX slurp this routine */
1990 return 0;
1991}
1992
1993int
864dbfa3 1994Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 1995{
97aff369 1996 dVAR;
a0714e2c 1997 SV *targ = NULL;
5f05dabc 1998 if (LvTARGLEN(sv)) {
68dc0745 1999 if (mg->mg_obj) {
8772537c
AL
2000 SV * const ahv = LvTARG(sv);
2001 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2002 if (he)
2003 targ = HeVAL(he);
68dc0745
PP
2004 }
2005 else {
8772537c 2006 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2007 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2008 targ = AvARRAY(av)[LvTARGOFF(sv)];
2009 }
46da273f 2010 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2011 /* somebody else defined it for us */
2012 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2013 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2014 LvTARGLEN(sv) = 0;
2015 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2016 mg->mg_obj = NULL;
68dc0745
PP
2017 mg->mg_flags &= ~MGf_REFCOUNTED;
2018 }
5f05dabc 2019 }
71be2cbc
PP
2020 else
2021 targ = LvTARG(sv);
3280af22 2022 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2023 return 0;
2024}
2025
2026int
864dbfa3 2027Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2028{
8772537c 2029 PERL_UNUSED_ARG(mg);
71be2cbc 2030 if (LvTARGLEN(sv))
68dc0745
PP
2031 vivify_defelem(sv);
2032 if (LvTARG(sv)) {
5f05dabc 2033 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2034 SvSETMAGIC(LvTARG(sv));
2035 }
5f05dabc
PP
2036 return 0;
2037}
2038
71be2cbc 2039void
864dbfa3 2040Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2041{
97aff369 2042 dVAR;
74e13ce4 2043 MAGIC *mg;
a0714e2c 2044 SV *value = NULL;
71be2cbc 2045
14befaf4 2046 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2047 return;
68dc0745 2048 if (mg->mg_obj) {
8772537c
AL
2049 SV * const ahv = LvTARG(sv);
2050 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2051 if (he)
2052 value = HeVAL(he);
3280af22 2053 if (!value || value == &PL_sv_undef)
ce5030a2 2054 Perl_croak(aTHX_ PL_no_helem_sv, mg->mg_obj);
71be2cbc 2055 }
68dc0745 2056 else {
8772537c 2057 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2058 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2059 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2060 else {
d4c19fe8 2061 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2062 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2063 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2064 }
2065 }
b37c2d43 2066 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2067 SvREFCNT_dec(LvTARG(sv));
2068 LvTARG(sv) = value;
71be2cbc 2069 LvTARGLEN(sv) = 0;
68dc0745 2070 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2071 mg->mg_obj = NULL;
68dc0745 2072 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2073}
2074
2075int
864dbfa3 2076Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2077{
86f55936 2078 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2079}
2080
2081int
864dbfa3 2082Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2083{
96a5add6 2084 PERL_UNUSED_CONTEXT;
565764a8 2085 mg->mg_len = -1;
c6496cc7 2086 SvSCREAM_off(sv);
93a17b20
LW
2087 return 0;
2088}
2089
2090int
864dbfa3 2091Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2092{
8772537c 2093 PERL_UNUSED_ARG(mg);
14befaf4 2094 sv_unmagic(sv, PERL_MAGIC_bm);
79072805
LW
2095 SvVALID_off(sv);
2096 return 0;
2097}
2098
2099int
864dbfa3 2100Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2101{
8772537c 2102 PERL_UNUSED_ARG(mg);
14befaf4 2103 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2104 SvCOMPILED_off(sv);
2105 return 0;
2106}
2107
2108int
864dbfa3 2109Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2110{
35a4481c 2111 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2112
2113 if (uf && uf->uf_set)
24f81a43 2114 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2115 return 0;
2116}
2117
c277df42 2118int
faf82a0b
AE
2119Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2120{
8772537c 2121 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2122 sv_unmagic(sv, PERL_MAGIC_qr);
2123 return 0;
2124}
2125
2126int
864dbfa3 2127Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2128{
97aff369 2129 dVAR;
8772537c
AL
2130 regexp * const re = (regexp *)mg->mg_obj;
2131 PERL_UNUSED_ARG(sv);
2132
c277df42
IZ
2133 ReREFCNT_dec(re);
2134 return 0;
2135}
2136
7a4c00b4 2137#ifdef USE_LOCALE_COLLATE
79072805 2138int
864dbfa3 2139Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2140{
2141 /*
838b5b74 2142 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2143 * and vanished with a faint plop.
2144 */
96a5add6 2145 PERL_UNUSED_CONTEXT;
8772537c 2146 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2147 if (mg->mg_ptr) {
2148 Safefree(mg->mg_ptr);
2149 mg->mg_ptr = NULL;
565764a8 2150 mg->mg_len = -1;
7a4c00b4 2151 }
bbce6d69
PP
2152 return 0;
2153}
7a4c00b4 2154#endif /* USE_LOCALE_COLLATE */
bbce6d69 2155
7e8c5dac
HS
2156/* Just clear the UTF-8 cache data. */
2157int
2158Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2159{
96a5add6 2160 PERL_UNUSED_CONTEXT;
8772537c 2161 PERL_UNUSED_ARG(sv);
7e8c5dac 2162 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2163 mg->mg_ptr = NULL;
7e8c5dac
HS
2164 mg->mg_len = -1; /* The mg_len holds the len cache. */
2165 return 0;
2166}
2167
bbce6d69 2168int
864dbfa3 2169Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2170{
97aff369 2171 dVAR;
e1ec3a88 2172 register const char *s;
79072805 2173 I32 i;
8990e307 2174 STRLEN len;
79072805 2175 switch (*mg->mg_ptr) {
748a9306 2176 case '\001': /* ^A */
3280af22 2177 sv_setsv(PL_bodytarget, sv);
748a9306 2178 break;
49460fe6 2179 case '\003': /* ^C */
38ab35f8 2180 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2181 break;
2182
79072805 2183 case '\004': /* ^D */
b4ab917c 2184#ifdef DEBUGGING
b83604b4 2185 s = SvPV_nolen_const(sv);
ddcf8bc1 2186 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2187 DEBUG_x(dump_all());
b4ab917c 2188#else
38ab35f8 2189 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2190#endif
79072805 2191 break;
28f23441 2192 case '\005': /* ^E */
d0063567 2193 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2194#ifdef MACOS_TRADITIONAL
38ab35f8 2195 gMacPerl_OSErr = SvIV(sv);
28f23441 2196#else
cd39f2b6 2197# ifdef VMS
38ab35f8 2198 set_vaxc_errno(SvIV(sv));
048c1ddf 2199# else
cd39f2b6 2200# ifdef WIN32
d0063567 2201 SetLastError( SvIV(sv) );
cd39f2b6 2202# else
9fed8b87 2203# ifdef OS2
38ab35f8 2204 os2_setsyserrno(SvIV(sv));
9fed8b87 2205# else
d0063567 2206 /* will anyone ever use this? */
38ab35f8 2207 SETERRNO(SvIV(sv), 4);
cd39f2b6 2208# endif
048c1ddf
IZ
2209# endif
2210# endif
22fae026 2211#endif
d0063567
DK
2212 }
2213 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2214 if (PL_encoding)
2215 SvREFCNT_dec(PL_encoding);
2216 if (SvOK(sv) || SvGMAGICAL(sv)) {
2217 PL_encoding = newSVsv(sv);
2218 }
2219 else {
a0714e2c 2220 PL_encoding = NULL;
d0063567
DK
2221 }
2222 }
2223 break;
79072805 2224 case '\006': /* ^F */
38ab35f8 2225 PL_maxsysfd = SvIV(sv);
79072805 2226 break;
a0d0e21e 2227 case '\010': /* ^H */
38ab35f8 2228 PL_hints = SvIV(sv);
a0d0e21e 2229 break;
9d116dd7 2230 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2231 Safefree(PL_inplace);
bd61b366 2232 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2233 break;
28f23441 2234 case '\017': /* ^O */
ac27b0f5 2235 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2236 Safefree(PL_osname);
bd61b366 2237 PL_osname = NULL;
3511154c
DM
2238 if (SvOK(sv)) {
2239 TAINT_PROPER("assigning to $^O");
2e0de35c 2240 PL_osname = savesvpv(sv);
3511154c 2241 }
ac27b0f5
NIS
2242 }
2243 else if (strEQ(mg->mg_ptr, "\017PEN")) {
11bcd5da
NC
2244 PL_compiling.cop_hints |= HINT_LEXICAL_IO;
2245 PL_hints |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO;
2246 PL_compiling.cop_hints_hash
2247 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2248 sv_2mortal(newSVpvs("open")), sv);
ac27b0f5 2249 }
28f23441 2250 break;
79072805 2251 case '\020': /* ^P */
38ab35f8 2252 PL_perldb = SvIV(sv);
f2a7f298 2253 if (PL_perldb && !PL_DBsingle)
1ee4443e 2254 init_debugger();
79072805
LW
2255 break;
2256 case '\024': /* ^T */
88e89b8a 2257#ifdef BIG_TIME
6b88bc9c 2258 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2259#else
38ab35f8 2260 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2261#endif
79072805 2262 break;
e07ea26a
NC
2263 case '\025': /* ^UTF8CACHE */
2264 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2265 PL_utf8cache = (signed char) sv_2iv(sv);
2266 }
2267 break;
fde18df1 2268 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2269 if (*(mg->mg_ptr+1) == '\0') {
2270 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2271 i = SvIV(sv);
ac27b0f5 2272 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2273 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2274 }
599cee73 2275 }
0a378802 2276 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2277 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2278 if (!SvPOK(sv) && PL_localizing) {
2279 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2280 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2281 break;
2282 }
f4fc7782 2283 {
b5477537 2284 STRLEN len, i;
d3a7d8c7 2285 int accumulate = 0 ;
f4fc7782 2286 int any_fatals = 0 ;
b83604b4 2287 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2288 for (i = 0 ; i < len ; ++i) {
2289 accumulate |= ptr[i] ;
2290 any_fatals |= (ptr[i] & 0xAA) ;
2291 }
d3a7d8c7
GS
2292 if (!accumulate)
2293 PL_compiling.cop_warnings = pWARN_NONE;
72dc9ed5
NC
2294 /* Yuck. I can't see how to abstract this: */
2295 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2296 WARN_ALL) && !any_fatals) {
f4fc7782
JH
2297 PL_compiling.cop_warnings = pWARN_ALL;
2298 PL_dowarn |= G_WARN_ONCE ;
727405f8 2299 }
d3a7d8c7 2300 else {
72dc9ed5
NC
2301 STRLEN len;
2302 const char *const p = SvPV_const(sv, len);
2303
2304 PL_compiling.cop_warnings
8ee4cf24 2305 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2306 p, len);
2307
d3a7d8c7
GS
2308 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2309 PL_dowarn |= G_WARN_ONCE ;
2310 }
f4fc7782 2311
d3a7d8c7 2312 }
4438c4b7 2313 }
971a9dd3 2314 }
79072805
LW
2315 break;
2316 case '.':
3280af22
NIS
2317 if (PL_localizing) {
2318 if (PL_localizing == 1)
7766f137 2319 SAVESPTR(PL_last_in_gv);
748a9306 2320 }
3280af22 2321 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2322 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2323 break;
2324 case '^':
3280af22 2325 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2326 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2327 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2328 break;
2329 case '~':
3280af22 2330 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2331 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2332 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2333 break;
2334 case '=':
38ab35f8 2335 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2336 break;
2337 case '-':
38ab35f8 2338 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2339 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2340 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2341 break;
2342 case '%':
38ab35f8 2343 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2344 break;
2345 case '|':
4b65379b 2346 {
8772537c 2347 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2348 if(!io)
2349 break;
38ab35f8 2350 if ((SvIV(sv)) == 0)
4b65379b
CS
2351 IoFLAGS(io) &= ~IOf_FLUSH;
2352 else {
2353 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2354 PerlIO *ofp = IoOFP(io);
2355 if (ofp)
2356 (void)PerlIO_flush(ofp);
2357 IoFLAGS(io) |= IOf_FLUSH;
2358 }
2359 }
79072805
LW
2360 }
2361 break;
79072805 2362 case '/':
3280af22 2363 SvREFCNT_dec(PL_rs);
8bfdd7d9 2364 PL_rs = newSVsv(sv);
79072805
LW
2365 break;
2366 case '\\':
7889fe52
NIS
2367 if (PL_ors_sv)
2368 SvREFCNT_dec(PL_ors_sv);
009c130f 2369 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2370 PL_ors_sv = newSVsv(sv);
009c130f 2371 }
e3c19b7b 2372 else {
a0714e2c 2373 PL_ors_sv = NULL;
e3c19b7b 2374 }
79072805
LW
2375 break;
2376 case ',':
7889fe52
NIS
2377 if (PL_ofs_sv)
2378 SvREFCNT_dec(PL_ofs_sv);
2379 if (SvOK(sv) || SvGMAGICAL(sv)) {
2380 PL_ofs_sv = newSVsv(sv);
2381 }
2382 else {
a0714e2c 2383 PL_ofs_sv = NULL;
7889fe52 2384 }
79072805 2385 break;
79072805 2386 case '[':
38ab35f8 2387 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2388 break;
2389 case '?':
ff0cee69 2390#ifdef COMPLEX_STATUS
6b88bc9c
GS
2391 if (PL_localizing == 2) {
2392 PL_statusvalue = LvTARGOFF(sv);
2393 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2394 }
2395 else
2396#endif
2397#ifdef VMSISH_STATUS
2398 if (VMSISH_STATUS)
fb38d079 2399 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2400 else
2401#endif
38ab35f8 2402 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2403 break;
2404 case '!':
93189314
JH
2405 {
2406#ifdef VMS
2407# define PERL_VMS_BANG vaxc$errno
2408#else
2409# define PERL_VMS_BANG 0
2410#endif
91487cfc 2411 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2412 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2413 }
79072805
LW
2414 break;
2415 case '<':
38ab35f8 2416 PL_uid = SvIV(sv);
3280af22
NIS
2417 if (PL_delaymagic) {
2418 PL_delaymagic |= DM_RUID;
79072805
LW
2419 break; /* don't do magic till later */
2420 }
2421#ifdef HAS_SETRUID
b28d0864 2422 (void)setruid((Uid_t)PL_uid);
79072805
LW
2423#else
2424#ifdef HAS_SETREUID
3280af22 2425 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2426#else
85e6fe83 2427#ifdef HAS_SETRESUID
b28d0864 2428 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2429#else
75870ed3 2430 if (PL_uid == PL_euid) { /* special case $< = $> */
2431#ifdef PERL_DARWIN
2432 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2433 if (PL_uid != 0 && PerlProc_getuid() == 0)
2434 (void)PerlProc_setuid(0);
2435#endif
b28d0864 2436 (void)PerlProc_setuid(PL_uid);
75870ed3 2437 } else {
d8eceb89 2438 PL_uid = PerlProc_getuid();
cea2e8a9 2439 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2440 }
79072805
LW
2441#endif
2442#endif
85e6fe83 2443#endif
d8eceb89 2444 PL_uid = PerlProc_getuid();
3280af22 2445 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2446 break;
2447 case '>':
38ab35f8 2448 PL_euid = SvIV(sv);
3280af22
NIS
2449 if (PL_delaymagic) {
2450 PL_delaymagic |= DM_EUID;
79072805
LW
2451 break; /* don't do magic till later */
2452 }
2453#ifdef HAS_SETEUID
3280af22 2454 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2455#else
2456#ifdef HAS_SETREUID
b28d0864 2457 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2458#else
2459#ifdef HAS_SETRESUID
6b88bc9c 2460 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2461#else
b28d0864
NIS
2462 if (PL_euid == PL_uid) /* special case $> = $< */
2463 PerlProc_setuid(PL_euid);
a0d0e21e 2464 else {
e8ee3774 2465 PL_euid = PerlProc_geteuid();
cea2e8a9 2466 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2467 }
79072805
LW
2468#endif
2469#endif
85e6fe83 2470#endif
d8eceb89 2471 PL_euid = PerlProc_geteuid();
3280af22 2472 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2473 break;
2474 case '(':
38ab35f8 2475 PL_gid = SvIV(sv);
3280af22
NIS
2476 if (PL_delaymagic) {
2477 PL_delaymagic |= DM_RGID;
79072805
LW
2478 break; /* don't do magic till later */
2479 }
2480#ifdef HAS_SETRGID
b28d0864 2481 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2482#else
2483#ifdef HAS_SETREGID
3280af22 2484 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2485#else
2486#ifdef HAS_SETRESGID
b28d0864 2487 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2488#else
b28d0864
NIS
2489 if (PL_gid == PL_egid) /* special case $( = $) */
2490 (void)PerlProc_setgid(PL_gid);
748a9306 2491 else {
d8eceb89 2492 PL_gid = PerlProc_getgid();
cea2e8a9 2493 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2494 }
79072805
LW
2495#endif
2496#endif
85e6fe83 2497#endif
d8eceb89 2498 PL_gid = PerlProc_getgid();
3280af22 2499 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2500 break;
2501 case ')':
5cd24f17
PP
2502#ifdef HAS_SETGROUPS
2503 {
b83604b4 2504 const char *p = SvPV_const(sv, len);
757f63d8
SP
2505 Groups_t *gary = NULL;
2506
2507 while (isSPACE(*p))
2508 ++p;
2509 PL_egid = Atol(p);
2510 for (i = 0; i < NGROUPS; ++i) {
2511 while (*p && !isSPACE(*p))
2512 ++p;
2513 while (isSPACE(*p))
2514 ++p;
2515 if (!*p)
2516 break;
2517 if(!gary)
2518 Newx(gary, i + 1, Groups_t);
2519 else
2520 Renew(gary, i + 1, Groups_t);
2521 gary[i] = Atol(p);
2522 }
2523 if (i)
2524 (void)setgroups(i, gary);
f5a63d97 2525 Safefree(gary);
5cd24f17
PP
2526 }
2527#else /* HAS_SETGROUPS */
38ab35f8 2528 PL_egid = SvIV(sv);
5cd24f17 2529#endif /* HAS_SETGROUPS */
3280af22
NIS
2530 if (PL_delaymagic) {
2531 PL_delaymagic |= DM_EGID;
79072805
LW
2532 break; /* don't do magic till later */
2533 }
2534#ifdef HAS_SETEGID
3280af22 2535 (void)setegid((Gid_t)PL_egid);
79072805
LW
2536#else
2537#ifdef HAS_SETREGID
b28d0864 2538 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2539#else
2540#ifdef HAS_SETRESGID
b28d0864 2541 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2542#else
b28d0864
NIS
2543 if (PL_egid == PL_gid) /* special case $) = $( */
2544 (void)PerlProc_setgid(PL_egid);
748a9306 2545 else {
d8eceb89 2546 PL_egid = PerlProc_getegid();
cea2e8a9 2547 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2548 }
79072805
LW
2549#endif
2550#endif
85e6fe83 2551#endif
d8eceb89 2552 PL_egid = PerlProc_getegid();
3280af22 2553 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2554 break;
2555 case ':':
2d8e6c8d 2556 PL_chopset = SvPV_force(sv,len);
79072805 2557 break;
cd39f2b6 2558#ifndef MACOS_TRADITIONAL
79072805 2559 case '0':
e2975953 2560 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2561#ifdef HAS_SETPROCTITLE
2562 /* The BSDs don't show the argv[] in ps(1) output, they
2563 * show a string from the process struct and provide
2564 * the setproctitle() routine to manipulate that. */
a2722ac9 2565 if (PL_origalen != 1) {
b83604b4 2566 s = SvPV_const(sv, len);
98b76f99 2567# if __FreeBSD_version > 410001
9aad2c0e 2568 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2569 * but not the "(perl) suffix from the ps(1)
2570 * output, because that's what ps(1) shows if the
2571 * argv[] is modified. */
6f2ad931 2572 setproctitle("-%s", s);
9aad2c0e 2573# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2574 /* This doesn't really work if you assume that
2575 * $0 = 'foobar'; will wipe out 'perl' from the $0
2576 * because in ps(1) output the result will be like
2577 * sprintf("perl: %s (perl)", s)
2578 * I guess this is a security feature:
2579 * one (a user process) cannot get rid of the original name.
2580 * --jhi */
2581 setproctitle("%s", s);
2582# endif
2583 }
2584#endif
17aa7f3d 2585#if defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2586 if (PL_origalen != 1) {
17aa7f3d 2587 union pstun un;
b83604b4 2588 s = SvPV_const(sv, len);
6867be6d 2589 un.pst_command = (char *)s;
17aa7f3d
JH
2590 pstat(PSTAT_SETCMD, un, len, 0, 0);
2591 }
2592#endif
2d2af554
GA
2593 if (PL_origalen > 1) {
2594 /* PL_origalen is set in perl_parse(). */
2595 s = SvPV_force(sv,len);
2596 if (len >= (STRLEN)PL_origalen-1) {
2597 /* Longer than original, will be truncated. We assume that
2598 * PL_origalen bytes are available. */
2599 Copy(s, PL_origargv[0], PL_origalen-1, char);
2600 }
2601 else {
2602 /* Shorter than original, will be padded. */
2603 Copy(s, PL_origargv[0], len, char);
2604 PL_origargv[0][len] = 0;
2605 memset(PL_origargv[0] + len + 1,
2606 /* Is the space counterintuitive? Yes.
2607 * (You were expecting \0?)
2608 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2609 * --jhi */
2610 (int)' ',
2611 PL_origalen - len - 1);
2612 }
2613 PL_origargv[0][PL_origalen-1] = 0;
2614 for (i = 1; i < PL_origargc; i++)
2615 PL_origargv[i] = 0;
79072805 2616 }
e2975953 2617 UNLOCK_DOLLARZERO_MUTEX;
79072805 2618 break;
cd39f2b6 2619#endif
79072805
LW
2620 }
2621 return 0;
2622}
2623
2624I32
35a4481c 2625Perl_whichsig(pTHX_ const char *sig)
79072805 2626{
aadb217d 2627 register char* const* sigv;
96a5add6 2628 PERL_UNUSED_CONTEXT;
79072805 2629
aadb217d 2630 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2631 if (strEQ(sig,*sigv))
aadb217d 2632 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2633#ifdef SIGCLD
2634 if (strEQ(sig,"CHLD"))
2635 return SIGCLD;
2636#endif
2637#ifdef SIGCHLD
2638 if (strEQ(sig,"CLD"))
2639 return SIGCHLD;
2640#endif
7f1236c0 2641 return -1;
79072805
LW
2642}
2643
ecfc5424 2644Signal_t
1e82f5a6 2645#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2646Perl_sighandler(int sig, ...)
1e82f5a6
SH
2647#else
2648Perl_sighandler(int sig)
2649#endif
79072805 2650{
1018e26f
NIS
2651#ifdef PERL_GET_SIG_CONTEXT
2652 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2653#else
cea2e8a9 2654 dTHX;
71d280e3 2655#endif
79072805 2656 dSP;
a0714e2c
SS
2657 GV *gv = NULL;
2658 SV *sv = NULL;
8772537c 2659 SV * const tSv = PL_Sv;
601f1833 2660 CV *cv = NULL;
533c011a 2661 OP *myop = PL_op;
84902520 2662 U32 flags = 0;
8772537c 2663 XPV * const tXpv = PL_Xpv;
71d280e3 2664
3280af22 2665 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2666 flags |= 1;
3280af22 2667 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2668 flags |= 4;
3280af22 2669 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2670 flags |= 16;
2671
727405f8 2672 if (!PL_psig_ptr[sig]) {
99ef548b 2673 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2674 PL_sig_name[sig]);
2675 exit(sig);
2676 }
ff0cee69 2677
84902520
TB
2678 /* Max number of items pushed there is 3*n or 4. We cannot fix
2679 infinity, so we fix 4 (in fact 5): */
2680 if (flags & 1) {
3280af22 2681 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2682 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2683 }
ac27b0f5 2684 if (flags & 4)
3280af22 2685 PL_markstack_ptr++; /* Protect mark. */
84902520 2686 if (flags & 16)
3280af22 2687 PL_scopestack_ix += 1;
84902520 2688 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2689 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2690 || SvTYPE(cv) != SVt_PVCV) {
2691 HV *st;
f2c0649b 2692 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2693 }
84902520 2694
a0d0e21e 2695 if (!cv || !CvROOT(cv)) {
599cee73 2696 if (ckWARN(WARN_SIGNAL))
9014280d 2697 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2698 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2699 : ((cv && CvGV(cv))
2700 ? GvENAME(CvGV(cv))
2701 : "__ANON__")));
2702 goto cleanup;
79072805
LW
2703 }
2704
22c35a8c 2705 if(PL_psig_name[sig]) {
b37c2d43 2706 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2707 flags |= 64;
df3728a2 2708#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2709 PL_sig_sv = sv;
df3728a2 2710#endif
84902520 2711 } else {
ff0cee69 2712 sv = sv_newmortal();
22c35a8c 2713 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2714 }
e336de0d 2715
e788e7d3 2716 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2717 PUSHMARK(SP);
79072805 2718 PUSHs(sv);
8aad04aa
JH
2719#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2720 {
2721 struct sigaction oact;
2722
2723 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2724 siginfo_t *sip;
2725 va_list args;
2726
2727 va_start(args, sig);
2728 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2729 if (sip) {
2730 HV *sih = newHV();
2731 SV *rv = newRV_noinc((SV*)sih);
2732 /* The siginfo fields signo, code, errno, pid, uid,
2733 * addr, status, and band are defined by POSIX/SUSv3. */
2734 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2735 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2736#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. */
ea1bde16 2737 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2738 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2739 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2740 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2741 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2742 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2743#endif
8aad04aa
JH
2744 EXTEND(SP, 2);
2745 PUSHs((SV*)rv);
10edeb5d 2746 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2747 }
b4552a27 2748
31427afe 2749 va_end(args);
8aad04aa
JH
2750 }
2751 }
2752#endif
79072805 2753 PUTBACK;
a0d0e21e 2754
1b266415 2755 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2756
d3acc0f7 2757 POPSTACK;
1b266415 2758 if (SvTRUE(ERRSV)) {
1d615522 2759#ifndef PERL_MICRO
983dbef6 2760#ifdef HAS_SIGPROCMASK
1b266415
NIS
2761 /* Handler "died", for example to get out of a restart-able read().
2762 * Before we re-do that on its behalf re-enable the signal which was
2763 * blocked by the system when we entered.
2764 */
2765 sigset_t set;
2766 sigemptyset(&set);
2767 sigaddset(&set,sig);
2768 sigprocmask(SIG_UNBLOCK, &set, NULL);
2769#else
2770 /* Not clear if this will work */
2771 (void)rsignal(sig, SIG_IGN);
5c1546dc 2772 (void)rsignal(sig, PL_csighandlerp);
1b266415 2773#endif
1d615522 2774#endif /* !PERL_MICRO */
bd61b366 2775 Perl_die(aTHX_ NULL);
1b266415 2776 }
00d579c5 2777cleanup:
84902520 2778 if (flags & 1)
3280af22 2779 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2780 if (flags & 4)
3280af22 2781 PL_markstack_ptr--;
84902520 2782 if (flags & 16)
3280af22 2783 PL_scopestack_ix -= 1;
84902520
TB
2784 if (flags & 64)
2785 SvREFCNT_dec(sv);
533c011a 2786 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2787
3280af22
NIS
2788 PL_Sv = tSv; /* Restore global temporaries. */
2789 PL_Xpv = tXpv;
53bb94e2 2790 return;
79072805 2791}
4e35701f
NIS
2792
2793
51371543 2794static void
8772537c 2795S_restore_magic(pTHX_ const void *p)
51371543 2796{
97aff369 2797 dVAR;
8772537c
AL
2798 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2799 SV* const sv = mgs->mgs_sv;
51371543
GS
2800
2801 if (!sv)
2802 return;
2803
2804 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2805 {
f8c7b90f 2806#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2807 /* While magic was saved (and off) sv_setsv may well have seen
2808 this SV as a prime candidate for COW. */
2809 if (SvIsCOW(sv))
e424a81e 2810 sv_force_normal_flags(sv, 0);
f9701176
NC
2811#endif
2812
51371543
GS
2813 if (mgs->mgs_flags)
2814 SvFLAGS(sv) |= mgs->mgs_flags;
2815 else
2816 mg_magical(sv);
2b77b520
YST
2817 if (SvGMAGICAL(sv)) {
2818 /* downgrade public flags to private,
2819 and discard any other private flags */
2820
10edeb5d
JH
2821 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2822 if (pubflags) {
2823 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2824 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2825 }
2826 }
51371543
GS
2827 }
2828
2829 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2830
2831 /* If we're still on top of the stack, pop us off. (That condition
2832 * will be satisfied if restore_magic was called explicitly, but *not*
2833 * if it's being called via leave_scope.)
2834 * The reason for doing this is that otherwise, things like sv_2cv()
2835 * may leave alloc gunk on the savestack, and some code
2836 * (e.g. sighandler) doesn't expect that...
2837 */
2838 if (PL_savestack_ix == mgs->mgs_ss_ix)
2839 {
2840 I32 popval = SSPOPINT;
c76ac1ee 2841 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2842 PL_savestack_ix -= 2;
2843 popval = SSPOPINT;
2844 assert(popval == SAVEt_ALLOC);
2845 popval = SSPOPINT;
2846 PL_savestack_ix -= popval;
2847 }
2848
2849}
2850
2851static void
8772537c 2852S_unwind_handler_stack(pTHX_ const void *p)
51371543 2853{
27da23d5 2854 dVAR;
e1ec3a88 2855 const U32 flags = *(const U32*)p;
51371543
GS
2856
2857 if (flags & 1)
2858 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2859#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2860 if (flags & 64)
27da23d5 2861 SvREFCNT_dec(PL_sig_sv);
df3728a2 2862#endif
51371543 2863}
1018e26f 2864
66610fdd 2865/*
b3ca2e83
NC
2866=for apidoc magic_sethint
2867
2868Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
2869C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
2870anything that would need a deep copy. Maybe we should warn if we find a
2871reference.
b3ca2e83
NC
2872
2873=cut
2874*/
2875int
2876Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
2877{
2878 dVAR;
2879 assert(mg->mg_len == HEf_SVKEY);
2880
e6e3e454
NC
2881 /* mg->mg_obj isn't being used. If needed, it would be possible to store
2882 an alternative leaf in there, with PL_compiling.cop_hints being used if
2883 it's NULL. If needed for threads, the alternative could lock a mutex,
2884 or take other more complex action. */
2885
5b9c0671
NC
2886 /* Something changed in %^H, so it will need to be restored on scope exit.
2887 Doing this here saves a lot of doing it manually in perl code (and
2888 forgetting to do it, and consequent subtle errors. */
2889 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
2890 PL_compiling.cop_hints_hash
2891 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 2892 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
2893 return 0;
2894}
2895
2896/*
2897=for apidoc magic_sethint
2898
c28fe1ec
NC
2899Triggered by a delete from %^H, records the key to
2900C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
2901
2902=cut
2903*/
2904int
2905Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
2906{
2907 dVAR;
f5a63d97
AL
2908 PERL_UNUSED_ARG(sv);
2909
b3ca2e83
NC
2910 assert(mg->mg_len == HEf_SVKEY);
2911
b3f24c00
MHM
2912 PERL_UNUSED_ARG(sv);
2913
5b9c0671 2914 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
2915 PL_compiling.cop_hints_hash
2916 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
2917 (SV *)mg->mg_ptr, &PL_sv_placeholder);
2918 return 0;
2919}
2920
2921/*
66610fdd
RGS
2922 * Local variables:
2923 * c-indentation-style: bsd
2924 * c-basic-offset: 4
2925 * indent-tabs-mode: t
2926 * End:
2927 *
37442d52
RGS
2928 * ex: set ts=8 sts=4 sw=4 noet:
2929 */