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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 */
b37c2d43 155 sv_2mortal(SvREFCNT_inc_simple(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);
5636d518
DB
275 len = Perl_utf8_length(aTHX_ s, s + len);
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;
382 if (isUPPER(type)) {
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)
534 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
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
RGS
732 sv_setnv(sv, (NV)errno);
733 sv_setpv(sv, errno ? Strerror(errno) : "");
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")) {
ac27b0f5
NIS
761 if (!PL_compiling.cop_io)
762 sv_setsv(sv, &PL_sv_undef);
763 else {
764 sv_setsv(sv, PL_compiling.cop_io);
765 }
766 }
28f23441 767 break;
79072805 768 case '\020': /* ^P */
3280af22 769 sv_setiv(sv, (IV)PL_perldb);
79072805 770 break;
fb73857a 771 case '\023': /* ^S */
823a54a3 772 if (nextchar == '\0') {
3280af22 773 if (PL_lex_state != LEX_NOTPARSING)
0c34ef67 774 SvOK_off(sv);
3280af22 775 else if (PL_in_eval)
6dc8a9e4 776 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
777 else
778 sv_setiv(sv, 0);
d58bf5aa 779 }
fb73857a 780 break;
79072805 781 case '\024': /* ^T */
823a54a3 782 if (nextchar == '\0') {
88e89b8a 783#ifdef BIG_TIME
7c36658b 784 sv_setnv(sv, PL_basetime);
88e89b8a 785#else
7c36658b 786 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 787#endif
7c36658b 788 }
823a54a3 789 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
790 sv_setiv(sv, PL_tainting
791 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
792 : 0);
7c36658b 793 break;
e07ea26a 794 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 795 if (strEQ(remaining, "NICODE"))
a05d7ebb 796 sv_setuv(sv, (UV) PL_unicode);
823a54a3 797 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 798 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
799 else if (strEQ(remaining, "TF8CACHE"))
800 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
801 break;
802 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 803 if (nextchar == '\0')
4438c4b7 804 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 805 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 806 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 807 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
808 }
809 else if (PL_compiling.cop_warnings == pWARN_STD) {
810 sv_setpvn(
811 sv,
812 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
813 WARNsize
814 );
815 }
d3a7d8c7 816 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
817 /* Get the bit mask for $warnings::Bits{all}, because
818 * it could have been extended by warnings::register */
819 SV **bits_all;
823a54a3 820 HV * const bits=get_hv("warnings::Bits", FALSE);
017a3ce5 821 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
822 sv_setsv(sv, *bits_all);
823 }
824 else {
825 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
826 }
ac27b0f5 827 }
4438c4b7
JH
828 else {
829 sv_setsv(sv, PL_compiling.cop_warnings);
ac27b0f5 830 }
d3a7d8c7 831 SvPOK_only(sv);
4438c4b7 832 }
79072805
LW
833 break;
834 case '1': case '2': case '3': case '4':
835 case '5': case '6': case '7': case '8': case '9': case '&':
aaa362c4 836 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
837 I32 s1, t1;
838
a863c7d1
MB
839 /*
840 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
841 * XXX Does the new way break anything?
842 */
ffc61ed2 843 paren = atoi(mg->mg_ptr); /* $& is in [0] */
79072805 844 getparen:
eb160463 845 if (paren <= (I32)rx->nparens &&
cf93c79d
IZ
846 (s1 = rx->startp[paren]) != -1 &&
847 (t1 = rx->endp[paren]) != -1)
bbce6d69 848 {
cf93c79d
IZ
849 i = t1 - s1;
850 s = rx->subbeg + s1;
c2b4a044 851 assert(rx->subbeg);
c2e66d9e 852
13f57bf8 853 getrx:
748a9306 854 if (i >= 0) {
fabdb6c0 855 const int oldtainted = PL_tainted;
f6ba9920 856 TAINT_NOT;
cf93c79d 857 sv_setpvn(sv, s, i);
f6ba9920 858 PL_tainted = oldtainted;
a30b2f1f 859 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
7e2040f0
GS
860 SvUTF8_on(sv);
861 else
862 SvUTF8_off(sv);
e9814ee1
HS
863 if (PL_tainting) {
864 if (RX_MATCH_TAINTED(rx)) {
823a54a3 865 MAGIC* const mg = SvMAGIC(sv);
e9814ee1
HS
866 MAGIC* mgt;
867 PL_tainted = 1;
b162af07 868 SvMAGIC_set(sv, mg->mg_moremagic);
e9814ee1
HS
869 SvTAINT(sv);
870 if ((mgt = SvMAGIC(sv))) {
871 mg->mg_moremagic = mgt;
b162af07 872 SvMAGIC_set(sv, mg);
e9814ee1
HS
873 }
874 } else
875 SvTAINTED_off(sv);
876 }
748a9306
LW
877 break;
878 }
79072805 879 }
79072805 880 }
3280af22 881 sv_setsv(sv,&PL_sv_undef);
79072805
LW
882 break;
883 case '+':
aaa362c4 884 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 885 paren = rx->lastparen;
a0d0e21e
LW
886 if (paren)
887 goto getparen;
79072805 888 }
3280af22 889 sv_setsv(sv,&PL_sv_undef);
79072805 890 break;
a01268b5
JH
891 case '\016': /* ^N */
892 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
893 paren = rx->lastcloseparen;
894 if (paren)
895 goto getparen;
896 }
897 sv_setsv(sv,&PL_sv_undef);
898 break;
79072805 899 case '`':
aaa362c4 900 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
901 if ((s = rx->subbeg) && rx->startp[0] != -1) {
902 i = rx->startp[0];
13f57bf8 903 goto getrx;
79072805 904 }
79072805 905 }
3280af22 906 sv_setsv(sv,&PL_sv_undef);
79072805
LW
907 break;
908 case '\'':
aaa362c4 909 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d
IZ
910 if (rx->subbeg && rx->endp[0] != -1) {
911 s = rx->subbeg + rx->endp[0];
912 i = rx->sublen - rx->endp[0];
13f57bf8 913 goto getrx;
79072805 914 }
79072805 915 }
3280af22 916 sv_setsv(sv,&PL_sv_undef);
79072805
LW
917 break;
918 case '.':
3280af22 919 if (GvIO(PL_last_in_gv)) {
357c8808 920 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 921 }
79072805
LW
922 break;
923 case '?':
809a5acc 924 {
809a5acc 925 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 926#ifdef COMPLEX_STATUS
6b88bc9c
GS
927 LvTARGOFF(sv) = PL_statusvalue;
928 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 929#endif
809a5acc 930 }
79072805
LW
931 break;
932 case '^':
0daa599b
RGS
933 if (GvIOp(PL_defoutgv))
934 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
935 if (s)
936 sv_setpv(sv,s);
937 else {
3280af22 938 sv_setpv(sv,GvENAME(PL_defoutgv));
79072805
LW
939 sv_catpv(sv,"_TOP");
940 }
941 break;
942 case '~':
0daa599b
RGS
943 if (GvIOp(PL_defoutgv))
944 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 945 if (!s)
3280af22 946 s = GvENAME(PL_defoutgv);
79072805
LW
947 sv_setpv(sv,s);
948 break;
79072805 949 case '=':
0daa599b
RGS
950 if (GvIOp(PL_defoutgv))
951 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
952 break;
953 case '-':
0daa599b
RGS
954 if (GvIOp(PL_defoutgv))
955 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
956 break;
957 case '%':
0daa599b
RGS
958 if (GvIOp(PL_defoutgv))
959 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 960 break;
79072805
LW
961 case ':':
962 break;
963 case '/':
964 break;
965 case '[':
3280af22 966 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
79072805
LW
967 break;
968 case '|':
0daa599b
RGS
969 if (GvIOp(PL_defoutgv))
970 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
971 break;
972 case ',':
79072805
LW
973 break;
974 case '\\':
b2ce0fda 975 if (PL_ors_sv)
f28098ff 976 sv_copypv(sv, PL_ors_sv);
79072805 977 break;
79072805 978 case '!':
a5f75d66 979#ifdef VMS
65202027 980 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 981 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 982#else
88e89b8a 983 {
8772537c 984 const int saveerrno = errno;
65202027 985 sv_setnv(sv, (NV)errno);
88e89b8a 986#ifdef OS2
ed344e4f
IZ
987 if (errno == errno_isOS2 || errno == errno_isOS2_set)
988 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 989 else
a5f75d66 990#endif
2304df62 991 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
992 errno = saveerrno;
993 }
994#endif
ad3296c6 995 SvRTRIM(sv);
946ec16e 996 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
997 break;
998 case '<':
3280af22 999 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1000 break;
1001 case '>':
3280af22 1002 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1003 break;
1004 case '(':
3280af22 1005 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1006 goto add_groups;
1007 case ')':
3280af22 1008 sv_setiv(sv, (IV)PL_egid);
79072805 1009 add_groups:
79072805 1010#ifdef HAS_GETGROUPS
79072805 1011 {
57d7c65e 1012 Groups_t *gary = NULL;
fb45abb2 1013 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1014 Newx(gary, num_groups, Groups_t);
1015 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1016 for (i = 0; i < num_groups; i++)
1017 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1018 Safefree(gary);
79072805 1019 }
155aba94 1020 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1021#endif
79072805 1022 break;
cd39f2b6 1023#ifndef MACOS_TRADITIONAL
79072805
LW
1024 case '0':
1025 break;
cd39f2b6 1026#endif
79072805 1027 }
a0d0e21e 1028 return 0;
79072805
LW
1029}
1030
1031int
864dbfa3 1032Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1033{
8772537c 1034 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1035
1036 if (uf && uf->uf_val)
24f81a43 1037 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1038 return 0;
1039}
1040
1041int
864dbfa3 1042Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1043{
27da23d5 1044 dVAR;
5aabfad6 1045 STRLEN len, klen;
fabdb6c0
AL
1046 const char *s = SvPV_const(sv,len);
1047 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1048 my_setenv(ptr, s);
1e422769 1049
a0d0e21e
LW
1050#ifdef DYNAMIC_ENV_FETCH
1051 /* We just undefd an environment var. Is a replacement */
1052 /* waiting in the wings? */
1053 if (!len) {
fabdb6c0
AL
1054 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1055 if (valp)
b83604b4 1056 s = SvPV_const(*valp, len);
a0d0e21e
LW
1057 }
1058#endif
1e422769 1059
39e571d4 1060#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1061 /* And you'll never guess what the dog had */
1062 /* in its mouth... */
3280af22 1063 if (PL_tainting) {
1e422769
PP
1064 MgTAINTEDDIR_off(mg);
1065#ifdef VMS
5aabfad6 1066 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1067 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1068 Stat_t sbuf;
1e422769
PP
1069 int i = 0, j = 0;
1070
b8ffc8df
RGS
1071 strncpy(eltbuf, s, 255);
1072 eltbuf[255] = 0;
1073 elt = eltbuf;
1e422769
PP
1074 do { /* DCL$PATH may be a search list */
1075 while (1) { /* as may dev portion of any element */
1076 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1077 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1078 cando_by_name(S_IWUSR,0,elt) ) {
1079 MgTAINTEDDIR_on(mg);
1080 return 0;
1081 }
1082 }
bd61b366 1083 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1084 *cp = '\0';
1085 if (my_trnlnm(elt, eltbuf, j++))
1086 elt = eltbuf;
1087 else
1088 break;
1089 }
1090 j = 0;
1091 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1092 }
1093#endif /* VMS */
5aabfad6 1094 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1095 const char * const strend = s + len;
463ee0b2
LW
1096
1097 while (s < strend) {
96827780 1098 char tmpbuf[256];
c623ac67 1099 Stat_t st;
5f74f29c 1100 I32 i;
96827780 1101 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
fc36a67e 1102 s, strend, ':', &i);
463ee0b2 1103 s++;
96827780
MB
1104 if (i >= sizeof tmpbuf /* too long -- assume the worst */
1105 || *tmpbuf != '/'
c6ed36e1 1106 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1107 MgTAINTEDDIR_on(mg);
1e422769
PP
1108 return 0;
1109 }
463ee0b2 1110 }
79072805
LW
1111 }
1112 }
39e571d4 1113#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1114
79072805
LW
1115 return 0;
1116}
1117
1118int
864dbfa3 1119Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1120{
8772537c 1121 PERL_UNUSED_ARG(sv);
bd61b366 1122 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1123 return 0;
1124}
1125
88e89b8a 1126int
864dbfa3 1127Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1128{
97aff369 1129 dVAR;
65e66c80 1130 PERL_UNUSED_ARG(mg);
b0269e46 1131#if defined(VMS)
cea2e8a9 1132 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1133#else
3280af22 1134 if (PL_localizing) {
fb73857a 1135 HE* entry;
b0269e46 1136 my_clearenv();
fb73857a 1137 hv_iterinit((HV*)sv);
155aba94 1138 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1139 I32 keylen;
1140 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1141 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1142 }
1143 }
1144#endif
1145 return 0;
1146}
1147
1148int
864dbfa3 1149Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1150{
27da23d5 1151 dVAR;
8772537c
AL
1152 PERL_UNUSED_ARG(sv);
1153 PERL_UNUSED_ARG(mg);
b0269e46
AB
1154#if defined(VMS)
1155 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1156#else
1157 my_clearenv();
1158#endif
3e3baf6d 1159 return 0;
66b1d557
HM
1160}
1161
64ca3a65 1162#ifndef PERL_MICRO
2d4fcd5e
AJ
1163#ifdef HAS_SIGPROCMASK
1164static void
1165restore_sigmask(pTHX_ SV *save_sv)
1166{
0bd48802 1167 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
2d4fcd5e
AJ
1168 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1169}
1170#endif
66b1d557 1171int
864dbfa3 1172Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1173{
97aff369 1174 dVAR;
88e89b8a 1175 /* Are we fetching a signal entry? */
8772537c 1176 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1177 if (i > 0) {
22c35a8c
GS
1178 if(PL_psig_ptr[i])
1179 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1180 else {
85b332e2 1181 Sighandler_t sigstate;
2e34cc90 1182 sigstate = rsignal_state(i);
23ada85b 1183#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1184 if (PL_sig_handlers_initted && PL_sig_ignoring[i]) sigstate = SIG_IGN;
2e34cc90
CL
1185#endif
1186#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1187 if (PL_sig_handlers_initted && PL_sig_defaulting[i]) sigstate = SIG_DFL;
85b332e2 1188#endif
88e89b8a 1189 /* cache state so we don't fetch it again */
8aad04aa 1190 if(sigstate == (Sighandler_t) SIG_IGN)
88e89b8a
PP
1191 sv_setpv(sv,"IGNORE");
1192 else
3280af22 1193 sv_setsv(sv,&PL_sv_undef);
b37c2d43 1194 PL_psig_ptr[i] = SvREFCNT_inc_simple(sv);
88e89b8a
PP
1195 SvTEMP_off(sv);
1196 }
1197 }
1198 return 0;
1199}
1200int
864dbfa3 1201Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1202{
2d4fcd5e
AJ
1203 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1204 * refactoring might be in order.
1205 */
27da23d5 1206 dVAR;
8772537c
AL
1207 register const char * const s = MgPV_nolen_const(mg);
1208 PERL_UNUSED_ARG(sv);
2d4fcd5e 1209 if (*s == '_') {
cbbf8932 1210 SV** svp = NULL;
2d4fcd5e
AJ
1211 if (strEQ(s,"__DIE__"))
1212 svp = &PL_diehook;
1213 else if (strEQ(s,"__WARN__"))
1214 svp = &PL_warnhook;
1215 else
1216 Perl_croak(aTHX_ "No such hook: %s", s);
27da23d5 1217 if (svp && *svp) {
8772537c 1218 SV * const to_dec = *svp;
cbbf8932 1219 *svp = NULL;
2d4fcd5e
AJ
1220 SvREFCNT_dec(to_dec);
1221 }
1222 }
1223 else {
2d4fcd5e 1224 /* Are we clearing a signal entry? */
8772537c 1225 const I32 i = whichsig(s);
e02bfb16 1226 if (i > 0) {
2d4fcd5e
AJ
1227#ifdef HAS_SIGPROCMASK
1228 sigset_t set, save;
1229 SV* save_sv;
1230 /* Avoid having the signal arrive at a bad time, if possible. */
1231 sigemptyset(&set);
1232 sigaddset(&set,i);
1233 sigprocmask(SIG_BLOCK, &set, &save);
1234 ENTER;
1235 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1236 SAVEFREESV(save_sv);
1237 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1238#endif
1239 PERL_ASYNC_CHECK();
1240#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1241 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1242#endif
1243#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1244 PL_sig_defaulting[i] = 1;
5c1546dc 1245 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1246#else
8aad04aa 1247 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1248#endif
1249 if(PL_psig_name[i]) {
1250 SvREFCNT_dec(PL_psig_name[i]);
1251 PL_psig_name[i]=0;
1252 }
1253 if(PL_psig_ptr[i]) {
6136c704 1254 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1255 PL_psig_ptr[i]=0;
1256 LEAVE;
1257 SvREFCNT_dec(to_dec);
1258 }
1259 else
1260 LEAVE;
1261 }
88e89b8a
PP
1262 }
1263 return 0;
1264}
3d37d572 1265
dd374669
AL
1266static void
1267S_raise_signal(pTHX_ int sig)
0a8e0eff 1268{
97aff369 1269 dVAR;
0a8e0eff
NIS
1270 /* Set a flag to say this signal is pending */
1271 PL_psig_pend[sig]++;
1272 /* And one to say _a_ signal is pending */
1273 PL_sig_pending = 1;
1274}
1275
1276Signal_t
8aad04aa
JH
1277#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1278Perl_csighandler(int sig, ...)
1279#else
0a8e0eff 1280Perl_csighandler(int sig)
8aad04aa 1281#endif
0a8e0eff 1282{
1018e26f
NIS
1283#ifdef PERL_GET_SIG_CONTEXT
1284 dTHXa(PERL_GET_SIG_CONTEXT);
1285#else
85b332e2
CL
1286 dTHX;
1287#endif
23ada85b 1288#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1289 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1290 if (PL_sig_ignoring[sig]) return;
85b332e2 1291#endif
2e34cc90 1292#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1293 if (PL_sig_defaulting[sig])
2e34cc90
CL
1294#ifdef KILL_BY_SIGPRC
1295 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1296#else
1297 exit(1);
1298#endif
1299#endif
4ffa73a3
JH
1300 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1301 /* Call the perl level handler now--
1302 * with risk we may be in malloc() etc. */
1303 (*PL_sighandlerp)(sig);
1304 else
dd374669 1305 S_raise_signal(aTHX_ sig);
0a8e0eff
NIS
1306}
1307
2e34cc90
CL
1308#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1309void
1310Perl_csighandler_init(void)
1311{
1312 int sig;
27da23d5 1313 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1314
1315 for (sig = 1; sig < SIG_SIZE; sig++) {
1316#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1317 dTHX;
27da23d5 1318 PL_sig_defaulting[sig] = 1;
5c1546dc 1319 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1320#endif
1321#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1322 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1323#endif
1324 }
27da23d5 1325 PL_sig_handlers_initted = 1;
2e34cc90
CL
1326}
1327#endif
1328
0a8e0eff
NIS
1329void
1330Perl_despatch_signals(pTHX)
1331{
97aff369 1332 dVAR;
0a8e0eff
NIS
1333 int sig;
1334 PL_sig_pending = 0;
1335 for (sig = 1; sig < SIG_SIZE; sig++) {
1336 if (PL_psig_pend[sig]) {
25da4428
JH
1337 PERL_BLOCKSIG_ADD(set, sig);
1338 PL_psig_pend[sig] = 0;
1339 PERL_BLOCKSIG_BLOCK(set);
f5203343 1340 (*PL_sighandlerp)(sig);
25da4428 1341 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1342 }
1343 }
1344}
1345
85e6fe83 1346int
864dbfa3 1347Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1348{
27da23d5 1349 dVAR;
79072805 1350 I32 i;
cbbf8932 1351 SV** svp = NULL;
2d4fcd5e
AJ
1352 /* Need to be careful with SvREFCNT_dec(), because that can have side
1353 * effects (due to closures). We must make sure that the new disposition
1354 * is in place before it is called.
1355 */
cbbf8932 1356 SV* to_dec = NULL;
e72dc28c 1357 STRLEN len;
2d4fcd5e
AJ
1358#ifdef HAS_SIGPROCMASK
1359 sigset_t set, save;
1360 SV* save_sv;
1361#endif
a0d0e21e 1362
d5263905 1363 register const char *s = MgPV_const(mg,len);
748a9306
LW
1364 if (*s == '_') {
1365 if (strEQ(s,"__DIE__"))
3280af22 1366 svp = &PL_diehook;
748a9306 1367 else if (strEQ(s,"__WARN__"))
3280af22 1368 svp = &PL_warnhook;
748a9306 1369 else
cea2e8a9 1370 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1371 i = 0;
4633a7c4 1372 if (*svp) {
2d4fcd5e 1373 to_dec = *svp;
cbbf8932 1374 *svp = NULL;
4633a7c4 1375 }
748a9306
LW
1376 }
1377 else {
1378 i = whichsig(s); /* ...no, a brick */
86d86cad 1379 if (i <= 0) {
e476b1b5 1380 if (ckWARN(WARN_SIGNAL))
9014280d 1381 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1382 return 0;
1383 }
2d4fcd5e
AJ
1384#ifdef HAS_SIGPROCMASK
1385 /* Avoid having the signal arrive at a bad time, if possible. */
1386 sigemptyset(&set);
1387 sigaddset(&set,i);
1388 sigprocmask(SIG_BLOCK, &set, &save);
1389 ENTER;
1390 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1391 SAVEFREESV(save_sv);
1392 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1393#endif
1394 PERL_ASYNC_CHECK();
2e34cc90 1395#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1396 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1397#endif
23ada85b 1398#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1399 PL_sig_ignoring[i] = 0;
85b332e2 1400#endif
2e34cc90 1401#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1402 PL_sig_defaulting[i] = 0;
2e34cc90 1403#endif
22c35a8c 1404 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1405 to_dec = PL_psig_ptr[i];
b37c2d43 1406 PL_psig_ptr[i] = SvREFCNT_inc_simple(sv);
88e89b8a 1407 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1408 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1409 SvREADONLY_on(PL_psig_name[i]);
748a9306 1410 }
a0d0e21e 1411 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1412 if (i) {
5c1546dc 1413 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1414#ifdef HAS_SIGPROCMASK
1415 LEAVE;
1416#endif
1417 }
748a9306 1418 else
b37c2d43 1419 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1420 if(to_dec)
1421 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1422 return 0;
1423 }
e72dc28c 1424 s = SvPV_force(sv,len);
748a9306 1425 if (strEQ(s,"IGNORE")) {
85b332e2 1426 if (i) {
23ada85b 1427#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1428 PL_sig_ignoring[i] = 1;
5c1546dc 1429 (void)rsignal(i, PL_csighandlerp);
85b332e2 1430#else
8aad04aa 1431 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1432#endif
2d4fcd5e 1433 }
748a9306
LW
1434 }
1435 else if (strEQ(s,"DEFAULT") || !*s) {
1436 if (i)
2e34cc90
CL
1437#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1438 {
27da23d5 1439 PL_sig_defaulting[i] = 1;
5c1546dc 1440 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1441 }
1442#else
8aad04aa 1443 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1444#endif
748a9306 1445 }
79072805 1446 else {
5aabfad6
PP
1447 /*
1448 * We should warn if HINT_STRICT_REFS, but without
1449 * access to a known hint bit in a known OP, we can't
1450 * tell whether HINT_STRICT_REFS is in force or not.
1451 */
46fc3d4c 1452 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1453 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1454 if (i)
5c1546dc 1455 (void)rsignal(i, PL_csighandlerp);
748a9306 1456 else
b37c2d43 1457 *svp = SvREFCNT_inc_simple(sv);
79072805 1458 }
2d4fcd5e
AJ
1459#ifdef HAS_SIGPROCMASK
1460 if(i)
1461 LEAVE;
1462#endif
1463 if(to_dec)
1464 SvREFCNT_dec(to_dec);
79072805
LW
1465 return 0;
1466}
64ca3a65 1467#endif /* !PERL_MICRO */
79072805
LW
1468
1469int
864dbfa3 1470Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1471{
97aff369 1472 dVAR;
8772537c
AL
1473 PERL_UNUSED_ARG(sv);
1474 PERL_UNUSED_ARG(mg);
3280af22 1475 PL_sub_generation++;
463ee0b2
LW
1476 return 0;
1477}
1478
1479int
864dbfa3 1480Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1481{
97aff369 1482 dVAR;
8772537c
AL
1483 PERL_UNUSED_ARG(sv);
1484 PERL_UNUSED_ARG(mg);
a0d0e21e 1485 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
3280af22 1486 PL_amagic_generation++;
463ee0b2 1487
a0d0e21e
LW
1488 return 0;
1489}
463ee0b2 1490
946ec16e 1491int
864dbfa3 1492Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1493{
dd374669 1494 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1495 I32 i = 0;
8772537c 1496 PERL_UNUSED_ARG(mg);
7719e241 1497
6ff81951 1498 if (hv) {
497b47a8
JH
1499 (void) hv_iterinit(hv);
1500 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1501 i = HvKEYS(hv);
1502 else {
1503 while (hv_iternext(hv))
1504 i++;
1505 }
6ff81951
GS
1506 }
1507
1508 sv_setiv(sv, (IV)i);
1509 return 0;
1510}
1511
1512int
864dbfa3 1513Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1514{
8772537c 1515 PERL_UNUSED_ARG(mg);
946ec16e
PP
1516 if (LvTARG(sv)) {
1517 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1518 }
1519 return 0;
ac27b0f5 1520}
946ec16e 1521
e336de0d 1522/* caller is responsible for stack switching/cleanup */
565764a8 1523STATIC int
e1ec3a88 1524S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1525{
97aff369 1526 dVAR;
a0d0e21e 1527 dSP;
463ee0b2 1528
924508f0
GS
1529 PUSHMARK(SP);
1530 EXTEND(SP, n);
33c27489 1531 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1532 if (n > 1) {
93965878 1533 if (mg->mg_ptr) {
565764a8 1534 if (mg->mg_len >= 0)
79cb57f6 1535 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1536 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1537 PUSHs((SV*)mg->mg_ptr);
1538 }
14befaf4 1539 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1540 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1541 }
1542 }
1543 if (n > 2) {
1544 PUSHs(val);
88e89b8a 1545 }
463ee0b2
LW
1546 PUTBACK;
1547
864dbfa3 1548 return call_method(meth, flags);
946ec16e
PP
1549}
1550
76e3520e 1551STATIC int
e1ec3a88 1552S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1553{
27da23d5 1554 dVAR; dSP;
463ee0b2 1555
a0d0e21e
LW
1556 ENTER;
1557 SAVETMPS;
e788e7d3 1558 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1559
33c27489 1560 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1561 sv_setsv(sv, *PL_stack_sp--);
93965878 1562 }
463ee0b2 1563
d3acc0f7 1564 POPSTACK;
a0d0e21e
LW
1565 FREETMPS;
1566 LEAVE;
1567 return 0;
1568}
463ee0b2 1569
a0d0e21e 1570int
864dbfa3 1571Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1572{
a0d0e21e
LW
1573 if (mg->mg_ptr)
1574 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1575 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1576 return 0;
1577}
1578
1579int
864dbfa3 1580Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1581{
27da23d5 1582 dVAR; dSP;
a60c0954 1583 ENTER;
e788e7d3 1584 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1585 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1586 POPSTACK;
a60c0954 1587 LEAVE;
463ee0b2
LW
1588 return 0;
1589}
1590
1591int
864dbfa3 1592Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1593{
a0d0e21e
LW
1594 return magic_methpack(sv,mg,"DELETE");
1595}
463ee0b2 1596
93965878
NIS
1597
1598U32
864dbfa3 1599Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1600{
27da23d5 1601 dVAR; dSP;
93965878
NIS
1602 U32 retval = 0;
1603
1604 ENTER;
1605 SAVETMPS;
e788e7d3 1606 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1607 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1608 sv = *PL_stack_sp--;
a60c0954 1609 retval = (U32) SvIV(sv)-1;
93965878 1610 }
d3acc0f7 1611 POPSTACK;
93965878
NIS
1612 FREETMPS;
1613 LEAVE;
1614 return retval;
1615}
1616
cea2e8a9
GS
1617int
1618Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1619{
27da23d5 1620 dVAR; dSP;
463ee0b2 1621
e336de0d 1622 ENTER;
e788e7d3 1623 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1624 PUSHMARK(SP);
33c27489 1625 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1626 PUTBACK;
864dbfa3 1627 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1628 POPSTACK;
a60c0954 1629 LEAVE;
a3bcc51e 1630
463ee0b2
LW
1631 return 0;
1632}
1633
1634int
864dbfa3 1635Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1636{
27da23d5 1637 dVAR; dSP;
35a4481c 1638 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1639
1640 ENTER;
a0d0e21e 1641 SAVETMPS;
e788e7d3 1642 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1643 PUSHMARK(SP);
1644 EXTEND(SP, 2);
33c27489 1645 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1646 if (SvOK(key))
1647 PUSHs(key);
1648 PUTBACK;
1649
864dbfa3 1650 if (call_method(meth, G_SCALAR))
3280af22 1651 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1652
d3acc0f7 1653 POPSTACK;
a0d0e21e
LW
1654 FREETMPS;
1655 LEAVE;
79072805
LW
1656 return 0;
1657}
1658
1659int
864dbfa3 1660Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e
LW
1661{
1662 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1663}
a0d0e21e 1664
a3bcc51e
TP
1665SV *
1666Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1667{
27da23d5 1668 dVAR; dSP;
a3bcc51e 1669 SV *retval = &PL_sv_undef;
8772537c
AL
1670 SV * const tied = SvTIED_obj((SV*)hv, mg);
1671 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1672
1673 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1674 SV *key;
bfcb3514 1675 if (HvEITER_get(hv))
a3bcc51e
TP
1676 /* we are in an iteration so the hash cannot be empty */
1677 return &PL_sv_yes;
1678 /* no xhv_eiter so now use FIRSTKEY */
1679 key = sv_newmortal();
1680 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1681 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1682 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1683 }
1684
1685 /* there is a SCALAR method that we can call */
1686 ENTER;
1687 PUSHSTACKi(PERLSI_MAGIC);
1688 PUSHMARK(SP);
1689 EXTEND(SP, 1);
1690 PUSHs(tied);
1691 PUTBACK;
1692
1693 if (call_method("SCALAR", G_SCALAR))
1694 retval = *PL_stack_sp--;
1695 POPSTACK;
1696 LEAVE;
1697 return retval;
1698}
1699
a0d0e21e 1700int
864dbfa3 1701Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1702{
97aff369 1703 dVAR;
8772537c
AL
1704 GV * const gv = PL_DBline;
1705 const I32 i = SvTRUE(sv);
1706 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1707 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1708 if (svp && SvIOKp(*svp)) {
1709 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1710 if (o) {
1711 /* set or clear breakpoint in the relevant control op */
1712 if (i)
1713 o->op_flags |= OPf_SPECIAL;
1714 else
1715 o->op_flags &= ~OPf_SPECIAL;
1716 }
5df8de69 1717 }
79072805
LW
1718 return 0;
1719}
1720
1721int
8772537c 1722Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1723{
97aff369 1724 dVAR;
8772537c 1725 const AV * const obj = (AV*)mg->mg_obj;
83bf042f
NC
1726 if (obj) {
1727 sv_setiv(sv, AvFILL(obj) + PL_curcop->cop_arybase);
1728 } else {
1729 SvOK_off(sv);
1730 }
79072805
LW
1731 return 0;
1732}
1733
1734int
864dbfa3 1735Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1736{
97aff369 1737 dVAR;
8772537c 1738 AV * const obj = (AV*)mg->mg_obj;
83bf042f
NC
1739 if (obj) {
1740 av_fill(obj, SvIV(sv) - PL_curcop->cop_arybase);
1741 } else {
1742 if (ckWARN(WARN_MISC))
1743 Perl_warner(aTHX_ packWARN(WARN_MISC),
1744 "Attempt to set length of freed array");
1745 }
1746 return 0;
1747}
1748
1749int
1750Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1751{
97aff369 1752 dVAR;
53c1dcc0 1753 PERL_UNUSED_ARG(sv);
94f3782b
DM
1754 /* during global destruction, mg_obj may already have been freed */
1755 if (PL_in_clean_all)
1ea47f64 1756 return 0;
94f3782b 1757
83bf042f
NC
1758 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1759
1760 if (mg) {
1761 /* arylen scalar holds a pointer back to the array, but doesn't own a
1762 reference. Hence the we (the array) are about to go away with it
1763 still pointing at us. Clear its pointer, else it would be pointing
1764 at free memory. See the comment in sv_magic about reference loops,
1765 and why it can't own a reference to us. */
1766 mg->mg_obj = 0;
1767 }
a0d0e21e
LW
1768 return 0;
1769}
1770
1771int
864dbfa3 1772Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1773{
97aff369 1774 dVAR;
8772537c 1775 SV* const lsv = LvTARG(sv);
ac27b0f5 1776
a0d0e21e 1777 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
14befaf4 1778 mg = mg_find(lsv, PERL_MAGIC_regex_global);
565764a8 1779 if (mg && mg->mg_len >= 0) {
a0ed51b3 1780 I32 i = mg->mg_len;
7e2040f0 1781 if (DO_UTF8(lsv))
a0ed51b3
LW
1782 sv_pos_b2u(lsv, &i);
1783 sv_setiv(sv, i + PL_curcop->cop_arybase);
a0d0e21e
LW
1784 return 0;
1785 }
1786 }
0c34ef67 1787 SvOK_off(sv);
a0d0e21e
LW
1788 return 0;
1789}
1790
1791int
864dbfa3 1792Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1793{
97aff369 1794 dVAR;
8772537c 1795 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1796 SSize_t pos;
1797 STRLEN len;
c00206c8 1798 STRLEN ulen = 0;
a0d0e21e
LW
1799
1800 mg = 0;
ac27b0f5 1801
a0d0e21e 1802 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
14befaf4 1803 mg = mg_find(lsv, PERL_MAGIC_regex_global);
a0d0e21e
LW
1804 if (!mg) {
1805 if (!SvOK(sv))
1806 return 0;
d83f0a82
NC
1807#ifdef PERL_OLD_COPY_ON_WRITE
1808 if (SvIsCOW(lsv))
1809 sv_force_normal_flags(lsv, 0);
1810#endif
1811 mg = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
1812 NULL, 0);
a0d0e21e
LW
1813 }
1814 else if (!SvOK(sv)) {
565764a8 1815 mg->mg_len = -1;
a0d0e21e
LW
1816 return 0;
1817 }
1818 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1819
c485e607 1820 pos = SvIV(sv) - PL_curcop->cop_arybase;
a0ed51b3 1821
7e2040f0 1822 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1823 ulen = sv_len_utf8(lsv);
1824 if (ulen)
1825 len = ulen;
a0ed51b3
LW
1826 }
1827
a0d0e21e
LW
1828 if (pos < 0) {
1829 pos += len;
1830 if (pos < 0)
1831 pos = 0;
1832 }
eb160463 1833 else if (pos > (SSize_t)len)
a0d0e21e 1834 pos = len;
a0ed51b3
LW
1835
1836 if (ulen) {
1837 I32 p = pos;
1838 sv_pos_u2b(lsv, &p, 0);
1839 pos = p;
1840 }
727405f8 1841
565764a8 1842 mg->mg_len = pos;
71be2cbc 1843 mg->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1844
79072805
LW
1845 return 0;
1846}
1847
1848int
864dbfa3 1849Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1850{
79072805 1851 GV* gv;
8772537c
AL
1852 PERL_UNUSED_ARG(mg);
1853
79072805
LW
1854 if (!SvOK(sv))
1855 return 0;
180488f8
NC
1856 if (SvFLAGS(sv) & SVp_SCREAM
1857 && (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVGV)) {
1858 /* We're actually already a typeglob, so don't need the stuff below.
1859 */
1860 return 0;
1861 }
f776e3cd 1862 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1863 if (sv == (SV*)gv)
1864 return 0;
1865 if (GvGP(sv))
88e89b8a 1866 gp_free((GV*)sv);
79072805 1867 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1868 return 0;
1869}
1870
1871int
864dbfa3 1872Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1873{
1874 STRLEN len;
35a4481c 1875 SV * const lsv = LvTARG(sv);
b83604b4 1876 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1877 I32 offs = LvTARGOFF(sv);
1878 I32 rem = LvTARGLEN(sv);
8772537c 1879 PERL_UNUSED_ARG(mg);
6ff81951 1880
9aa983d2
JH
1881 if (SvUTF8(lsv))
1882 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1883 if (offs > (I32)len)
6ff81951 1884 offs = len;
eb160463 1885 if (rem + offs > (I32)len)
6ff81951
GS
1886 rem = len - offs;
1887 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1888 if (SvUTF8(lsv))
2ef4b674 1889 SvUTF8_on(sv);
6ff81951
GS
1890 return 0;
1891}
1892
1893int
864dbfa3 1894Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1895{
97aff369 1896 dVAR;
9aa983d2 1897 STRLEN len;
b83604b4 1898 const char *tmps = SvPV_const(sv, len);
dd374669 1899 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1900 I32 lvoff = LvTARGOFF(sv);
1901 I32 lvlen = LvTARGLEN(sv);
8772537c 1902 PERL_UNUSED_ARG(mg);
075a4a2b 1903
1aa99e6b 1904 if (DO_UTF8(sv)) {
9aa983d2
JH
1905 sv_utf8_upgrade(lsv);
1906 sv_pos_u2b(lsv, &lvoff, &lvlen);
1907 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1908 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1909 SvUTF8_on(lsv);
1910 }
9bf12eaf 1911 else if (lsv && SvUTF8(lsv)) {
9aa983d2 1912 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1913 LvTARGLEN(sv) = len;
e95af362 1914 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
9aa983d2
JH
1915 sv_insert(lsv, lvoff, lvlen, tmps, len);
1916 Safefree(tmps);
1aa99e6b 1917 }
b76f3ce2
GB
1918 else {
1919 sv_insert(lsv, lvoff, lvlen, tmps, len);
1920 LvTARGLEN(sv) = len;
1921 }
1922
1aa99e6b 1923
79072805
LW
1924 return 0;
1925}
1926
1927int
864dbfa3 1928Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1929{
97aff369 1930 dVAR;
8772537c 1931 PERL_UNUSED_ARG(sv);
27cc343c 1932 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
1933 return 0;
1934}
1935
1936int
864dbfa3 1937Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1938{
97aff369 1939 dVAR;
8772537c 1940 PERL_UNUSED_ARG(sv);
0a9c116b
DM
1941 /* update taint status unless we're restoring at scope exit */
1942 if (PL_localizing != 2) {
1943 if (PL_tainted)
1944 mg->mg_len |= 1;
1945 else
1946 mg->mg_len &= ~1;
1947 }
463ee0b2
LW
1948 return 0;
1949}
1950
1951int
864dbfa3 1952Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1953{
35a4481c 1954 SV * const lsv = LvTARG(sv);
8772537c 1955 PERL_UNUSED_ARG(mg);
6ff81951 1956
6136c704
AL
1957 if (lsv)
1958 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1959 else
0c34ef67 1960 SvOK_off(sv);
6ff81951 1961
6ff81951
GS
1962 return 0;
1963}
1964
1965int
864dbfa3 1966Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 1967{
8772537c 1968 PERL_UNUSED_ARG(mg);
79072805
LW
1969 do_vecset(sv); /* XXX slurp this routine */
1970 return 0;
1971}
1972
1973int
864dbfa3 1974Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 1975{
97aff369 1976 dVAR;
a0714e2c 1977 SV *targ = NULL;
5f05dabc 1978 if (LvTARGLEN(sv)) {
68dc0745 1979 if (mg->mg_obj) {
8772537c
AL
1980 SV * const ahv = LvTARG(sv);
1981 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
1982 if (he)
1983 targ = HeVAL(he);
68dc0745
PP
1984 }
1985 else {
8772537c 1986 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
1987 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1988 targ = AvARRAY(av)[LvTARGOFF(sv)];
1989 }
3280af22 1990 if (targ && targ != &PL_sv_undef) {
68dc0745
PP
1991 /* somebody else defined it for us */
1992 SvREFCNT_dec(LvTARG(sv));
b37c2d43 1993 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
1994 LvTARGLEN(sv) = 0;
1995 SvREFCNT_dec(mg->mg_obj);
a0714e2c 1996 mg->mg_obj = NULL;
68dc0745
PP
1997 mg->mg_flags &= ~MGf_REFCOUNTED;
1998 }
5f05dabc 1999 }
71be2cbc
PP
2000 else
2001 targ = LvTARG(sv);
3280af22 2002 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2003 return 0;
2004}
2005
2006int
864dbfa3 2007Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2008{
8772537c 2009 PERL_UNUSED_ARG(mg);
71be2cbc 2010 if (LvTARGLEN(sv))
68dc0745
PP
2011 vivify_defelem(sv);
2012 if (LvTARG(sv)) {
5f05dabc 2013 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2014 SvSETMAGIC(LvTARG(sv));
2015 }
5f05dabc
PP
2016 return 0;
2017}
2018
71be2cbc 2019void
864dbfa3 2020Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2021{
97aff369 2022 dVAR;
74e13ce4 2023 MAGIC *mg;
a0714e2c 2024 SV *value = NULL;
71be2cbc 2025
14befaf4 2026 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2027 return;
68dc0745 2028 if (mg->mg_obj) {
8772537c
AL
2029 SV * const ahv = LvTARG(sv);
2030 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2031 if (he)
2032 value = HeVAL(he);
3280af22 2033 if (!value || value == &PL_sv_undef)
ce5030a2 2034 Perl_croak(aTHX_ PL_no_helem_sv, mg->mg_obj);
71be2cbc 2035 }
68dc0745 2036 else {
8772537c 2037 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2038 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2039 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2040 else {
d4c19fe8 2041 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2042 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2043 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2044 }
2045 }
b37c2d43 2046 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2047 SvREFCNT_dec(LvTARG(sv));
2048 LvTARG(sv) = value;
71be2cbc 2049 LvTARGLEN(sv) = 0;
68dc0745 2050 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2051 mg->mg_obj = NULL;
68dc0745 2052 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2053}
2054
2055int
864dbfa3 2056Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2057{
86f55936 2058 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2059}
2060
2061int
864dbfa3 2062Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2063{
96a5add6 2064 PERL_UNUSED_CONTEXT;
565764a8 2065 mg->mg_len = -1;
c6496cc7 2066 SvSCREAM_off(sv);
93a17b20
LW
2067 return 0;
2068}
2069
2070int
864dbfa3 2071Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2072{
8772537c 2073 PERL_UNUSED_ARG(mg);
14befaf4 2074 sv_unmagic(sv, PERL_MAGIC_bm);
79072805
LW
2075 SvVALID_off(sv);
2076 return 0;
2077}
2078
2079int
864dbfa3 2080Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2081{
8772537c 2082 PERL_UNUSED_ARG(mg);
14befaf4 2083 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2084 SvCOMPILED_off(sv);
2085 return 0;
2086}
2087
2088int
864dbfa3 2089Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2090{
35a4481c 2091 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2092
2093 if (uf && uf->uf_set)
24f81a43 2094 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2095 return 0;
2096}
2097
c277df42 2098int
faf82a0b
AE
2099Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2100{
8772537c 2101 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2102 sv_unmagic(sv, PERL_MAGIC_qr);
2103 return 0;
2104}
2105
2106int
864dbfa3 2107Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2108{
97aff369 2109 dVAR;
8772537c
AL
2110 regexp * const re = (regexp *)mg->mg_obj;
2111 PERL_UNUSED_ARG(sv);
2112
c277df42
IZ
2113 ReREFCNT_dec(re);
2114 return 0;
2115}
2116
7a4c00b4 2117#ifdef USE_LOCALE_COLLATE
79072805 2118int
864dbfa3 2119Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2120{
2121 /*
838b5b74 2122 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2123 * and vanished with a faint plop.
2124 */
96a5add6 2125 PERL_UNUSED_CONTEXT;
8772537c 2126 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2127 if (mg->mg_ptr) {
2128 Safefree(mg->mg_ptr);
2129 mg->mg_ptr = NULL;
565764a8 2130 mg->mg_len = -1;
7a4c00b4 2131 }
bbce6d69
PP
2132 return 0;
2133}
7a4c00b4 2134#endif /* USE_LOCALE_COLLATE */
bbce6d69 2135
7e8c5dac
HS
2136/* Just clear the UTF-8 cache data. */
2137int
2138Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2139{
96a5add6 2140 PERL_UNUSED_CONTEXT;
8772537c 2141 PERL_UNUSED_ARG(sv);
7e8c5dac
HS
2142 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2143 mg->mg_ptr = 0;
2144 mg->mg_len = -1; /* The mg_len holds the len cache. */
2145 return 0;
2146}
2147
bbce6d69 2148int
864dbfa3 2149Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2150{
97aff369 2151 dVAR;
e1ec3a88 2152 register const char *s;
79072805 2153 I32 i;
8990e307 2154 STRLEN len;
79072805 2155 switch (*mg->mg_ptr) {
748a9306 2156 case '\001': /* ^A */
3280af22 2157 sv_setsv(PL_bodytarget, sv);
748a9306 2158 break;
49460fe6 2159 case '\003': /* ^C */
eb160463 2160 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
49460fe6
NIS
2161 break;
2162
79072805 2163 case '\004': /* ^D */
b4ab917c 2164#ifdef DEBUGGING
b83604b4 2165 s = SvPV_nolen_const(sv);
ddcf8bc1 2166 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2167 DEBUG_x(dump_all());
b4ab917c
DM
2168#else
2169 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
2170#endif
79072805 2171 break;
28f23441 2172 case '\005': /* ^E */
d0063567 2173 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2174#ifdef MACOS_TRADITIONAL
d0063567 2175 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
28f23441 2176#else
cd39f2b6 2177# ifdef VMS
d0063567 2178 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
048c1ddf 2179# else
cd39f2b6 2180# ifdef WIN32
d0063567 2181 SetLastError( SvIV(sv) );
cd39f2b6 2182# else
9fed8b87 2183# ifdef OS2
d0063567 2184 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
9fed8b87 2185# else
d0063567
DK
2186 /* will anyone ever use this? */
2187 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
cd39f2b6 2188# endif
048c1ddf
IZ
2189# endif
2190# endif
22fae026 2191#endif
d0063567
DK
2192 }
2193 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2194 if (PL_encoding)
2195 SvREFCNT_dec(PL_encoding);
2196 if (SvOK(sv) || SvGMAGICAL(sv)) {
2197 PL_encoding = newSVsv(sv);
2198 }
2199 else {
a0714e2c 2200 PL_encoding = NULL;
d0063567
DK
2201 }
2202 }
2203 break;
79072805 2204 case '\006': /* ^F */
3280af22 2205 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
79072805 2206 break;
a0d0e21e 2207 case '\010': /* ^H */
3280af22 2208 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
a0d0e21e 2209 break;
9d116dd7 2210 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2211 Safefree(PL_inplace);
bd61b366 2212 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2213 break;
28f23441 2214 case '\017': /* ^O */
ac27b0f5 2215 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2216 Safefree(PL_osname);
bd61b366 2217 PL_osname = NULL;
3511154c
DM
2218 if (SvOK(sv)) {
2219 TAINT_PROPER("assigning to $^O");
2e0de35c 2220 PL_osname = savesvpv(sv);
3511154c 2221 }
ac27b0f5
NIS
2222 }
2223 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2224 if (!PL_compiling.cop_io)
2225 PL_compiling.cop_io = newSVsv(sv);
2226 else
2227 sv_setsv(PL_compiling.cop_io,sv);
2228 }
28f23441 2229 break;
79072805 2230 case '\020': /* ^P */
3280af22 2231 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
f2a7f298 2232 if (PL_perldb && !PL_DBsingle)
1ee4443e 2233 init_debugger();
79072805
LW
2234 break;
2235 case '\024': /* ^T */
88e89b8a 2236#ifdef BIG_TIME
6b88bc9c 2237 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2238#else
3280af22 2239 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
88e89b8a 2240#endif
79072805 2241 break;
e07ea26a
NC
2242 case '\025': /* ^UTF8CACHE */
2243 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2244 PL_utf8cache = (signed char) sv_2iv(sv);
2245 }
2246 break;
fde18df1 2247 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2248 if (*(mg->mg_ptr+1) == '\0') {
2249 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2250 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
ac27b0f5 2251 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2252 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2253 }
599cee73 2254 }
0a378802 2255 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2256 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2257 if (!SvPOK(sv) && PL_localizing) {
2258 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2259 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2260 break;
2261 }
f4fc7782 2262 {
b5477537 2263 STRLEN len, i;
d3a7d8c7 2264 int accumulate = 0 ;
f4fc7782 2265 int any_fatals = 0 ;
b83604b4 2266 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2267 for (i = 0 ; i < len ; ++i) {
2268 accumulate |= ptr[i] ;
2269 any_fatals |= (ptr[i] & 0xAA) ;
2270 }
d3a7d8c7
GS
2271 if (!accumulate)
2272 PL_compiling.cop_warnings = pWARN_NONE;
f4fc7782
JH
2273 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
2274 PL_compiling.cop_warnings = pWARN_ALL;
2275 PL_dowarn |= G_WARN_ONCE ;
727405f8 2276 }
d3a7d8c7
GS
2277 else {
2278 if (specialWARN(PL_compiling.cop_warnings))
2279 PL_compiling.cop_warnings = newSVsv(sv) ;
2280 else
2281 sv_setsv(PL_compiling.cop_warnings, sv);
2282 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2283 PL_dowarn |= G_WARN_ONCE ;
2284 }
f4fc7782 2285
d3a7d8c7 2286 }
4438c4b7 2287 }
971a9dd3 2288 }
79072805
LW
2289 break;
2290 case '.':
3280af22
NIS
2291 if (PL_localizing) {
2292 if (PL_localizing == 1)
7766f137 2293 SAVESPTR(PL_last_in_gv);
748a9306 2294 }
3280af22 2295 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2296 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2297 break;
2298 case '^':
3280af22 2299 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2300 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2301 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2302 break;
2303 case '~':
3280af22 2304 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2305 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2306 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2307 break;
2308 case '=':
632db599 2309 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
79072805
LW
2310 break;
2311 case '-':
632db599 2312 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
3280af22
NIS
2313 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2314 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2315 break;
2316 case '%':
632db599 2317 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
79072805
LW
2318 break;
2319 case '|':
4b65379b 2320 {
8772537c 2321 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2322 if(!io)
2323 break;
4b65379b
CS
2324 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2325 IoFLAGS(io) &= ~IOf_FLUSH;
2326 else {
2327 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2328 PerlIO *ofp = IoOFP(io);
2329 if (ofp)
2330 (void)PerlIO_flush(ofp);
2331 IoFLAGS(io) |= IOf_FLUSH;
2332 }
2333 }
79072805
LW
2334 }
2335 break;
79072805 2336 case '/':
3280af22 2337 SvREFCNT_dec(PL_rs);
8bfdd7d9 2338 PL_rs = newSVsv(sv);
79072805
LW
2339 break;
2340 case '\\':
7889fe52
NIS
2341 if (PL_ors_sv)
2342 SvREFCNT_dec(PL_ors_sv);
009c130f 2343 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2344 PL_ors_sv = newSVsv(sv);
009c130f 2345 }
e3c19b7b 2346 else {
a0714e2c 2347 PL_ors_sv = NULL;
e3c19b7b 2348 }
79072805
LW
2349 break;
2350 case ',':
7889fe52
NIS
2351 if (PL_ofs_sv)
2352 SvREFCNT_dec(PL_ofs_sv);
2353 if (SvOK(sv) || SvGMAGICAL(sv)) {
2354 PL_ofs_sv = newSVsv(sv);
2355 }
2356 else {
a0714e2c 2357 PL_ofs_sv = NULL;
7889fe52 2358 }
79072805 2359 break;
79072805 2360 case '[':
3280af22 2361 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
79072805
LW
2362 break;
2363 case '?':
ff0cee69 2364#ifdef COMPLEX_STATUS
6b88bc9c
GS
2365 if (PL_localizing == 2) {
2366 PL_statusvalue = LvTARGOFF(sv);
2367 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2368 }
2369 else
2370#endif
2371#ifdef VMSISH_STATUS
2372 if (VMSISH_STATUS)
fb38d079 2373 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2374 else
2375#endif
fb38d079 2376 STATUS_UNIX_EXIT_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
79072805
LW
2377 break;
2378 case '!':
93189314
JH
2379 {
2380#ifdef VMS
2381# define PERL_VMS_BANG vaxc$errno
2382#else
2383# define PERL_VMS_BANG 0
2384#endif
91487cfc 2385 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2386 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2387 }
79072805
LW
2388 break;
2389 case '<':
3280af22
NIS
2390 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2391 if (PL_delaymagic) {
2392 PL_delaymagic |= DM_RUID;
79072805
LW
2393 break; /* don't do magic till later */
2394 }
2395#ifdef HAS_SETRUID
b28d0864 2396 (void)setruid((Uid_t)PL_uid);
79072805
LW
2397#else
2398#ifdef HAS_SETREUID
3280af22 2399 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2400#else
85e6fe83 2401#ifdef HAS_SETRESUID
b28d0864 2402 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2403#else
75870ed3 2404 if (PL_uid == PL_euid) { /* special case $< = $> */
2405#ifdef PERL_DARWIN
2406 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2407 if (PL_uid != 0 && PerlProc_getuid() == 0)
2408 (void)PerlProc_setuid(0);
2409#endif
b28d0864 2410 (void)PerlProc_setuid(PL_uid);
75870ed3 2411 } else {
d8eceb89 2412 PL_uid = PerlProc_getuid();
cea2e8a9 2413 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2414 }
79072805
LW
2415#endif
2416#endif
85e6fe83 2417#endif
d8eceb89 2418 PL_uid = PerlProc_getuid();
3280af22 2419 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2420 break;
2421 case '>':
3280af22
NIS
2422 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2423 if (PL_delaymagic) {
2424 PL_delaymagic |= DM_EUID;
79072805
LW
2425 break; /* don't do magic till later */
2426 }
2427#ifdef HAS_SETEUID
3280af22 2428 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2429#else
2430#ifdef HAS_SETREUID
b28d0864 2431 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2432#else
2433#ifdef HAS_SETRESUID
6b88bc9c 2434 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2435#else
b28d0864
NIS
2436 if (PL_euid == PL_uid) /* special case $> = $< */
2437 PerlProc_setuid(PL_euid);
a0d0e21e 2438 else {
e8ee3774 2439 PL_euid = PerlProc_geteuid();
cea2e8a9 2440 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2441 }
79072805
LW
2442#endif
2443#endif
85e6fe83 2444#endif
d8eceb89 2445 PL_euid = PerlProc_geteuid();
3280af22 2446 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2447 break;
2448 case '(':
3280af22
NIS
2449 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2450 if (PL_delaymagic) {
2451 PL_delaymagic |= DM_RGID;
79072805
LW
2452 break; /* don't do magic till later */
2453 }
2454#ifdef HAS_SETRGID
b28d0864 2455 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2456#else
2457#ifdef HAS_SETREGID
3280af22 2458 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2459#else
2460#ifdef HAS_SETRESGID
b28d0864 2461 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2462#else
b28d0864
NIS
2463 if (PL_gid == PL_egid) /* special case $( = $) */
2464 (void)PerlProc_setgid(PL_gid);
748a9306 2465 else {
d8eceb89 2466 PL_gid = PerlProc_getgid();
cea2e8a9 2467 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2468 }
79072805
LW
2469#endif
2470#endif
85e6fe83 2471#endif
d8eceb89 2472 PL_gid = PerlProc_getgid();
3280af22 2473 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2474 break;
2475 case ')':
5cd24f17
PP
2476#ifdef HAS_SETGROUPS
2477 {
b83604b4 2478 const char *p = SvPV_const(sv, len);
757f63d8
SP
2479 Groups_t *gary = NULL;
2480
2481 while (isSPACE(*p))
2482 ++p;
2483 PL_egid = Atol(p);
2484 for (i = 0; i < NGROUPS; ++i) {
2485 while (*p && !isSPACE(*p))
2486 ++p;
2487 while (isSPACE(*p))
2488 ++p;
2489 if (!*p)
2490 break;
2491 if(!gary)
2492 Newx(gary, i + 1, Groups_t);
2493 else
2494 Renew(gary, i + 1, Groups_t);
2495 gary[i] = Atol(p);
2496 }
2497 if (i)
2498 (void)setgroups(i, gary);
2499 if (gary)
2500 Safefree(gary);
5cd24f17
PP
2501 }
2502#else /* HAS_SETGROUPS */
b28d0864 2503 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
5cd24f17 2504#endif /* HAS_SETGROUPS */
3280af22
NIS
2505 if (PL_delaymagic) {
2506 PL_delaymagic |= DM_EGID;
79072805
LW
2507 break; /* don't do magic till later */
2508 }
2509#ifdef HAS_SETEGID
3280af22 2510 (void)setegid((Gid_t)PL_egid);
79072805
LW
2511#else
2512#ifdef HAS_SETREGID
b28d0864 2513 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2514#else
2515#ifdef HAS_SETRESGID
b28d0864 2516 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2517#else
b28d0864
NIS
2518 if (PL_egid == PL_gid) /* special case $) = $( */
2519 (void)PerlProc_setgid(PL_egid);
748a9306 2520 else {
d8eceb89 2521 PL_egid = PerlProc_getegid();
cea2e8a9 2522 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2523 }
79072805
LW
2524#endif
2525#endif
85e6fe83 2526#endif
d8eceb89 2527 PL_egid = PerlProc_getegid();
3280af22 2528 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2529 break;
2530 case ':':
2d8e6c8d 2531 PL_chopset = SvPV_force(sv,len);
79072805 2532 break;
cd39f2b6 2533#ifndef MACOS_TRADITIONAL
79072805 2534 case '0':
e2975953 2535 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2536#ifdef HAS_SETPROCTITLE
2537 /* The BSDs don't show the argv[] in ps(1) output, they
2538 * show a string from the process struct and provide
2539 * the setproctitle() routine to manipulate that. */
a2722ac9 2540 if (PL_origalen != 1) {
b83604b4 2541 s = SvPV_const(sv, len);
98b76f99 2542# if __FreeBSD_version > 410001
9aad2c0e 2543 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2544 * but not the "(perl) suffix from the ps(1)
2545 * output, because that's what ps(1) shows if the
2546 * argv[] is modified. */
6f2ad931 2547 setproctitle("-%s", s);
9aad2c0e 2548# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2549 /* This doesn't really work if you assume that
2550 * $0 = 'foobar'; will wipe out 'perl' from the $0
2551 * because in ps(1) output the result will be like
2552 * sprintf("perl: %s (perl)", s)
2553 * I guess this is a security feature:
2554 * one (a user process) cannot get rid of the original name.
2555 * --jhi */
2556 setproctitle("%s", s);
2557# endif
2558 }
2559#endif
17aa7f3d 2560#if defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2561 if (PL_origalen != 1) {
17aa7f3d 2562 union pstun un;
b83604b4 2563 s = SvPV_const(sv, len);
6867be6d 2564 un.pst_command = (char *)s;
17aa7f3d
JH
2565 pstat(PSTAT_SETCMD, un, len, 0, 0);
2566 }
2567#endif
2d2af554
GA
2568 if (PL_origalen > 1) {
2569 /* PL_origalen is set in perl_parse(). */
2570 s = SvPV_force(sv,len);
2571 if (len >= (STRLEN)PL_origalen-1) {
2572 /* Longer than original, will be truncated. We assume that
2573 * PL_origalen bytes are available. */
2574 Copy(s, PL_origargv[0], PL_origalen-1, char);
2575 }
2576 else {
2577 /* Shorter than original, will be padded. */
2578 Copy(s, PL_origargv[0], len, char);
2579 PL_origargv[0][len] = 0;
2580 memset(PL_origargv[0] + len + 1,
2581 /* Is the space counterintuitive? Yes.
2582 * (You were expecting \0?)
2583 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2584 * --jhi */
2585 (int)' ',
2586 PL_origalen - len - 1);
2587 }
2588 PL_origargv[0][PL_origalen-1] = 0;
2589 for (i = 1; i < PL_origargc; i++)
2590 PL_origargv[i] = 0;
79072805 2591 }
e2975953 2592 UNLOCK_DOLLARZERO_MUTEX;
79072805 2593 break;
cd39f2b6 2594#endif
79072805
LW
2595 }
2596 return 0;
2597}
2598
2599I32
35a4481c 2600Perl_whichsig(pTHX_ const char *sig)
79072805 2601{
aadb217d 2602 register char* const* sigv;
96a5add6 2603 PERL_UNUSED_CONTEXT;
79072805 2604
aadb217d 2605 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2606 if (strEQ(sig,*sigv))
aadb217d 2607 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2608#ifdef SIGCLD
2609 if (strEQ(sig,"CHLD"))
2610 return SIGCLD;
2611#endif
2612#ifdef SIGCHLD
2613 if (strEQ(sig,"CLD"))
2614 return SIGCHLD;
2615#endif
7f1236c0 2616 return -1;
79072805
LW
2617}
2618
ecfc5424 2619Signal_t
1e82f5a6 2620#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2621Perl_sighandler(int sig, ...)
1e82f5a6
SH
2622#else
2623Perl_sighandler(int sig)
2624#endif
79072805 2625{
1018e26f
NIS
2626#ifdef PERL_GET_SIG_CONTEXT
2627 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2628#else
cea2e8a9 2629 dTHX;
71d280e3 2630#endif
79072805 2631 dSP;
a0714e2c
SS
2632 GV *gv = NULL;
2633 SV *sv = NULL;
8772537c 2634 SV * const tSv = PL_Sv;
601f1833 2635 CV *cv = NULL;
533c011a 2636 OP *myop = PL_op;
84902520 2637 U32 flags = 0;
8772537c 2638 XPV * const tXpv = PL_Xpv;
71d280e3 2639
3280af22 2640 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2641 flags |= 1;
3280af22 2642 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2643 flags |= 4;
3280af22 2644 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2645 flags |= 16;
2646
727405f8 2647 if (!PL_psig_ptr[sig]) {
99ef548b 2648 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2649 PL_sig_name[sig]);
2650 exit(sig);
2651 }
ff0cee69 2652
84902520
TB
2653 /* Max number of items pushed there is 3*n or 4. We cannot fix
2654 infinity, so we fix 4 (in fact 5): */
2655 if (flags & 1) {
3280af22 2656 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2657 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2658 }
ac27b0f5 2659 if (flags & 4)
3280af22 2660 PL_markstack_ptr++; /* Protect mark. */
84902520 2661 if (flags & 16)
3280af22 2662 PL_scopestack_ix += 1;
84902520 2663 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2664 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2665 || SvTYPE(cv) != SVt_PVCV) {
2666 HV *st;
f2c0649b 2667 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2668 }
84902520 2669
a0d0e21e 2670 if (!cv || !CvROOT(cv)) {
599cee73 2671 if (ckWARN(WARN_SIGNAL))
9014280d 2672 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2673 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2674 : ((cv && CvGV(cv))
2675 ? GvENAME(CvGV(cv))
2676 : "__ANON__")));
2677 goto cleanup;
79072805
LW
2678 }
2679
22c35a8c 2680 if(PL_psig_name[sig]) {
b37c2d43 2681 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2682 flags |= 64;
df3728a2 2683#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2684 PL_sig_sv = sv;
df3728a2 2685#endif
84902520 2686 } else {
ff0cee69 2687 sv = sv_newmortal();
22c35a8c 2688 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2689 }
e336de0d 2690
e788e7d3 2691 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2692 PUSHMARK(SP);
79072805 2693 PUSHs(sv);
8aad04aa
JH
2694#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2695 {
2696 struct sigaction oact;
2697
2698 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2699 siginfo_t *sip;
2700 va_list args;
2701
2702 va_start(args, sig);
2703 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2704 if (sip) {
2705 HV *sih = newHV();
2706 SV *rv = newRV_noinc((SV*)sih);
2707 /* The siginfo fields signo, code, errno, pid, uid,
2708 * addr, status, and band are defined by POSIX/SUSv3. */
2709 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2710 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2711#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 2712 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2713 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2714 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2715 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2716 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2717 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2718#endif
8aad04aa
JH
2719 EXTEND(SP, 2);
2720 PUSHs((SV*)rv);
2721 PUSHs(newSVpv((void*)sip, sizeof(*sip)));
2722 }
b4552a27 2723
31427afe 2724 va_end(args);
8aad04aa
JH
2725 }
2726 }
2727#endif
79072805 2728 PUTBACK;
a0d0e21e 2729
1b266415 2730 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2731
d3acc0f7 2732 POPSTACK;
1b266415 2733 if (SvTRUE(ERRSV)) {
1d615522 2734#ifndef PERL_MICRO
983dbef6 2735#ifdef HAS_SIGPROCMASK
1b266415
NIS
2736 /* Handler "died", for example to get out of a restart-able read().
2737 * Before we re-do that on its behalf re-enable the signal which was
2738 * blocked by the system when we entered.
2739 */
2740 sigset_t set;
2741 sigemptyset(&set);
2742 sigaddset(&set,sig);
2743 sigprocmask(SIG_UNBLOCK, &set, NULL);
2744#else
2745 /* Not clear if this will work */
2746 (void)rsignal(sig, SIG_IGN);
5c1546dc 2747 (void)rsignal(sig, PL_csighandlerp);
1b266415 2748#endif
1d615522 2749#endif /* !PERL_MICRO */
bd61b366 2750 Perl_die(aTHX_ NULL);
1b266415 2751 }
00d579c5 2752cleanup:
84902520 2753 if (flags & 1)
3280af22 2754 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2755 if (flags & 4)
3280af22 2756 PL_markstack_ptr--;
84902520 2757 if (flags & 16)
3280af22 2758 PL_scopestack_ix -= 1;
84902520
TB
2759 if (flags & 64)
2760 SvREFCNT_dec(sv);
533c011a 2761 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2762
3280af22
NIS
2763 PL_Sv = tSv; /* Restore global temporaries. */
2764 PL_Xpv = tXpv;
53bb94e2 2765 return;
79072805 2766}
4e35701f
NIS
2767
2768
51371543 2769static void
8772537c 2770S_restore_magic(pTHX_ const void *p)
51371543 2771{
97aff369 2772 dVAR;
8772537c
AL
2773 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2774 SV* const sv = mgs->mgs_sv;
51371543
GS
2775
2776 if (!sv)
2777 return;
2778
2779 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2780 {
f8c7b90f 2781#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2782 /* While magic was saved (and off) sv_setsv may well have seen
2783 this SV as a prime candidate for COW. */
2784 if (SvIsCOW(sv))
e424a81e 2785 sv_force_normal_flags(sv, 0);
f9701176
NC
2786#endif
2787
51371543
GS
2788 if (mgs->mgs_flags)
2789 SvFLAGS(sv) |= mgs->mgs_flags;
2790 else
2791 mg_magical(sv);
2b77b520
YST
2792 if (SvGMAGICAL(sv)) {
2793 /* downgrade public flags to private,
2794 and discard any other private flags */
2795
2796 U32 public = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2797 if (public) {
2798 SvFLAGS(sv) &= ~( public | SVp_IOK|SVp_NOK|SVp_POK );
2799 SvFLAGS(sv) |= ( public << PRIVSHIFT );
2800 }
2801 }
51371543
GS
2802 }
2803
2804 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2805
2806 /* If we're still on top of the stack, pop us off. (That condition
2807 * will be satisfied if restore_magic was called explicitly, but *not*
2808 * if it's being called via leave_scope.)
2809 * The reason for doing this is that otherwise, things like sv_2cv()
2810 * may leave alloc gunk on the savestack, and some code
2811 * (e.g. sighandler) doesn't expect that...
2812 */
2813 if (PL_savestack_ix == mgs->mgs_ss_ix)
2814 {
2815 I32 popval = SSPOPINT;
c76ac1ee 2816 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2817 PL_savestack_ix -= 2;
2818 popval = SSPOPINT;
2819 assert(popval == SAVEt_ALLOC);
2820 popval = SSPOPINT;
2821 PL_savestack_ix -= popval;
2822 }
2823
2824}
2825
2826static void
8772537c 2827S_unwind_handler_stack(pTHX_ const void *p)
51371543 2828{
27da23d5 2829 dVAR;
e1ec3a88 2830 const U32 flags = *(const U32*)p;
51371543
GS
2831
2832 if (flags & 1)
2833 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2834#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2835 if (flags & 64)
27da23d5 2836 SvREFCNT_dec(PL_sig_sv);
df3728a2 2837#endif
51371543 2838}
1018e26f 2839
66610fdd
RGS
2840/*
2841 * Local variables:
2842 * c-indentation-style: bsd
2843 * c-basic-offset: 4
2844 * indent-tabs-mode: t
2845 * End:
2846 *
37442d52
RGS
2847 * ex: set ts=8 sts=4 sw=4 noet:
2848 */