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Fix Win32 breakage (code before declaration) caused by #31766
[perl5.git] / mg.c
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a0d0e21e 1/* mg.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
7272f7c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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);
085bde85
NC
103 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
104 /* No public flags are set, so promote any private flags to public. */
105 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
106 }
c07a80fd
PP
107}
108
954c1994
GS
109/*
110=for apidoc mg_magical
111
112Turns on the magical status of an SV. See C<sv_magic>.
113
114=cut
115*/
116
8990e307 117void
864dbfa3 118Perl_mg_magical(pTHX_ SV *sv)
8990e307 119{
e1ec3a88 120 const MAGIC* mg;
96a5add6 121 PERL_UNUSED_CONTEXT;
8990e307 122 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 123 const MGVTBL* const vtbl = mg->mg_virtual;
8990e307 124 if (vtbl) {
2b260de0 125 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
8990e307
LW
126 SvGMAGICAL_on(sv);
127 if (vtbl->svt_set)
128 SvSMAGICAL_on(sv);
2b260de0 129 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
8990e307
LW
130 SvRMAGICAL_on(sv);
131 }
132 }
133}
134
2767dea0
DM
135
136/* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
137
138STATIC bool
139S_is_container_magic(const MAGIC *mg)
140{
141 switch (mg->mg_type) {
142 case PERL_MAGIC_bm:
143 case PERL_MAGIC_fm:
144 case PERL_MAGIC_regex_global:
145 case PERL_MAGIC_nkeys:
146#ifdef USE_LOCALE_COLLATE
147 case PERL_MAGIC_collxfrm:
148#endif
149 case PERL_MAGIC_qr:
150 case PERL_MAGIC_taint:
151 case PERL_MAGIC_vec:
152 case PERL_MAGIC_vstring:
153 case PERL_MAGIC_utf8:
154 case PERL_MAGIC_substr:
155 case PERL_MAGIC_defelem:
156 case PERL_MAGIC_arylen:
157 case PERL_MAGIC_pos:
158 case PERL_MAGIC_backref:
159 case PERL_MAGIC_arylen_p:
160 case PERL_MAGIC_rhash:
161 case PERL_MAGIC_symtab:
162 return 0;
163 default:
164 return 1;
165 }
166}
167
954c1994
GS
168/*
169=for apidoc mg_get
170
171Do magic after a value is retrieved from the SV. See C<sv_magic>.
172
173=cut
174*/
175
79072805 176int
864dbfa3 177Perl_mg_get(pTHX_ SV *sv)
79072805 178{
97aff369 179 dVAR;
35a4481c 180 const I32 mgs_ix = SSNEW(sizeof(MGS));
fe2774ed 181 const bool was_temp = (bool)SvTEMP(sv);
0723351e 182 int have_new = 0;
ff76feab 183 MAGIC *newmg, *head, *cur, *mg;
20135930 184 /* guard against sv having being freed midway by holding a private
6683b158
NC
185 reference. */
186
187 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
188 cause the SV's buffer to get stolen (and maybe other stuff).
189 So restore it.
190 */
46da273f 191 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC
192 if (!was_temp) {
193 SvTEMP_off(sv);
194 }
195
455ece5e 196 save_magic(mgs_ix, sv);
463ee0b2 197
ff76feab
AMS
198 /* We must call svt_get(sv, mg) for each valid entry in the linked
199 list of magic. svt_get() may delete the current entry, add new
200 magic to the head of the list, or upgrade the SV. AMS 20010810 */
201
202 newmg = cur = head = mg = SvMAGIC(sv);
203 while (mg) {
35a4481c 204 const MGVTBL * const vtbl = mg->mg_virtual;
ff76feab 205
2b260de0 206 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 207 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 208
58f82c5c
DM
209 /* guard against magic having been deleted - eg FETCH calling
210 * untie */
211 if (!SvMAGIC(sv))
212 break;
b77f7d40 213
ff76feab
AMS
214 /* Don't restore the flags for this entry if it was deleted. */
215 if (mg->mg_flags & MGf_GSKIP)
216 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
a0d0e21e 217 }
ff76feab
AMS
218
219 mg = mg->mg_moremagic;
220
0723351e 221 if (have_new) {
ff76feab
AMS
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
224 if (mg == head) {
0723351e 225 have_new = 0;
ff76feab
AMS
226 mg = cur;
227 head = newmg;
228 }
229 }
230
231 /* Were any new entries added? */
0723351e
NC
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
233 have_new = 1;
ff76feab
AMS
234 cur = mg;
235 mg = newmg;
760ac839 236 }
79072805 237 }
463ee0b2 238
8772537c 239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC
240
241 if (SvREFCNT(sv) == 1) {
242 /* We hold the last reference to this SV, which implies that the
243 SV was deleted as a side effect of the routines we called. */
0c34ef67 244 SvOK_off(sv);
6683b158 245 }
79072805
LW
246 return 0;
247}
248
954c1994
GS
249/*
250=for apidoc mg_set
251
252Do magic after a value is assigned to the SV. See C<sv_magic>.
253
254=cut
255*/
256
79072805 257int
864dbfa3 258Perl_mg_set(pTHX_ SV *sv)
79072805 259{
97aff369 260 dVAR;
35a4481c 261 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 262 MAGIC* mg;
463ee0b2
LW
263 MAGIC* nextmg;
264
455ece5e 265 save_magic(mgs_ix, sv);
463ee0b2
LW
266
267 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 268 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 269 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
270 if (mg->mg_flags & MGf_GSKIP) {
271 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
455ece5e 272 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
a0d0e21e 273 }
e7cbf6c6
DM
274 if (PL_localizing == 2 && !S_is_container_magic(mg))
275 continue;
2b260de0 276 if (vtbl && vtbl->svt_set)
fc0dc3b3 277 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 278 }
463ee0b2 279
8772537c 280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
281 return 0;
282}
283
954c1994
GS
284/*
285=for apidoc mg_length
286
287Report on the SV's length. See C<sv_magic>.
288
289=cut
290*/
291
79072805 292U32
864dbfa3 293Perl_mg_length(pTHX_ SV *sv)
79072805 294{
97aff369 295 dVAR;
79072805 296 MAGIC* mg;
463ee0b2 297 STRLEN len;
463ee0b2 298
79072805 299 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 300 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 301 if (vtbl && vtbl->svt_len) {
35a4481c 302 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 303 save_magic(mgs_ix, sv);
a0d0e21e 304 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 305 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 306 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
307 return len;
308 }
309 }
310
35a4481c 311 if (DO_UTF8(sv)) {
10516c54 312 const U8 *s = (U8*)SvPV_const(sv, len);
f5a63d97 313 len = utf8_length(s, s + len);
5636d518
DB
314 }
315 else
10516c54 316 (void)SvPV_const(sv, len);
463ee0b2 317 return len;
79072805
LW
318}
319
8fb26106 320I32
864dbfa3 321Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
322{
323 MAGIC* mg;
ac27b0f5 324
93965878 325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 326 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 327 if (vtbl && vtbl->svt_len) {
35a4481c
AL
328 const I32 mgs_ix = SSNEW(sizeof(MGS));
329 I32 len;
455ece5e 330 save_magic(mgs_ix, sv);
93965878 331 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 332 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 333 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
334 return len;
335 }
336 }
337
338 switch(SvTYPE(sv)) {
339 case SVt_PVAV:
35a4481c 340 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
93965878
NIS
341 case SVt_PVHV:
342 /* FIXME */
343 default:
cea2e8a9 344 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
345 break;
346 }
347 return 0;
348}
349
954c1994
GS
350/*
351=for apidoc mg_clear
352
353Clear something magical that the SV represents. See C<sv_magic>.
354
355=cut
356*/
357
79072805 358int
864dbfa3 359Perl_mg_clear(pTHX_ SV *sv)
79072805 360{
35a4481c 361 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 362 MAGIC* mg;
463ee0b2 363
455ece5e 364 save_magic(mgs_ix, sv);
463ee0b2 365
79072805 366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 367 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 368 /* omit GSKIP -- never set here */
727405f8 369
2b260de0 370 if (vtbl && vtbl->svt_clear)
fc0dc3b3 371 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 372 }
463ee0b2 373
8772537c 374 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
375 return 0;
376}
377
954c1994
GS
378/*
379=for apidoc mg_find
380
381Finds the magic pointer for type matching the SV. See C<sv_magic>.
382
383=cut
384*/
385
93a17b20 386MAGIC*
35a4481c 387Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 388{
96a5add6 389 PERL_UNUSED_CONTEXT;
35a4481c
AL
390 if (sv) {
391 MAGIC *mg;
392 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
393 if (mg->mg_type == type)
394 return mg;
395 }
93a17b20 396 }
5f66b61c 397 return NULL;
93a17b20
LW
398}
399
954c1994
GS
400/*
401=for apidoc mg_copy
402
403Copies the magic from one SV to another. See C<sv_magic>.
404
405=cut
406*/
407
79072805 408int
864dbfa3 409Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 410{
463ee0b2 411 int count = 0;
79072805 412 MAGIC* mg;
463ee0b2 413 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 414 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS
415 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
416 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
417 }
823a54a3
AL
418 else {
419 const char type = mg->mg_type;
1e73acc8 420 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
421 sv_magic(nsv,
422 (type == PERL_MAGIC_tied)
423 ? SvTIED_obj(sv, mg)
424 : (type == PERL_MAGIC_regdata && mg->mg_obj)
425 ? sv
426 : mg->mg_obj,
427 toLOWER(type), key, klen);
428 count++;
429 }
79072805 430 }
79072805 431 }
463ee0b2 432 return count;
79072805
LW
433}
434
954c1994 435/*
0cbee0a4
DM
436=for apidoc mg_localize
437
438Copy some of the magic from an existing SV to new localized version of
439that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
440doesn't (eg taint, pos).
441
442=cut
443*/
444
445void
446Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
447{
97aff369 448 dVAR;
0cbee0a4
DM
449 MAGIC *mg;
450 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 451 const MGVTBL* const vtbl = mg->mg_virtual;
2767dea0 452 if (!S_is_container_magic(mg))
0cbee0a4 453 continue;
0cbee0a4 454
a5063e7c
DM
455 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
456 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
457 else
0cbee0a4
DM
458 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
459 mg->mg_ptr, mg->mg_len);
a5063e7c 460
0cbee0a4
DM
461 /* container types should remain read-only across localization */
462 SvFLAGS(nsv) |= SvREADONLY(sv);
463 }
464
465 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
466 SvFLAGS(nsv) |= SvMAGICAL(sv);
467 PL_localizing = 1;
468 SvSETMAGIC(nsv);
469 PL_localizing = 0;
470 }
471}
472
473/*
954c1994
GS
474=for apidoc mg_free
475
476Free any magic storage used by the SV. See C<sv_magic>.
477
478=cut
479*/
480
79072805 481int
864dbfa3 482Perl_mg_free(pTHX_ SV *sv)
79072805
LW
483{
484 MAGIC* mg;
485 MAGIC* moremagic;
486 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 487 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 488 moremagic = mg->mg_moremagic;
2b260de0 489 if (vtbl && vtbl->svt_free)
fc0dc3b3 490 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 491 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 492 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 493 Safefree(mg->mg_ptr);
565764a8 494 else if (mg->mg_len == HEf_SVKEY)
88e89b8a 495 SvREFCNT_dec((SV*)mg->mg_ptr);
d460ef45 496 }
b881518d
JH
497 if (mg->mg_flags & MGf_REFCOUNTED)
498 SvREFCNT_dec(mg->mg_obj);
79072805
LW
499 Safefree(mg);
500 }
b162af07 501 SvMAGIC_set(sv, NULL);
79072805
LW
502 return 0;
503}
504
79072805 505#include <signal.h>
79072805 506
942e002e 507U32
864dbfa3 508Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 509{
97aff369 510 dVAR;
8772537c 511 PERL_UNUSED_ARG(sv);
6cef1e77 512
0bd48802
AL
513 if (PL_curpm) {
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
515 if (rx) {
a678b0e4
YO
516 if (mg->mg_obj) { /* @+ */
517 /* return the number possible */
518 return rx->nparens;
519 } else { /* @- */
520 I32 paren = rx->lastparen;
521
522 /* return the last filled */
f46c4081 523 while ( paren >= 0
f0ab9afb
NC
524 && (rx->offs[paren].start == -1
525 || rx->offs[paren].end == -1) )
f46c4081 526 paren--;
a678b0e4
YO
527 return (U32)paren;
528 }
0bd48802 529 }
8f580fb8 530 }
ac27b0f5 531
942e002e 532 return (U32)-1;
6cef1e77
IZ
533}
534
535int
864dbfa3 536Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 537{
97aff369 538 dVAR;
0bd48802
AL
539 if (PL_curpm) {
540 register const REGEXP * const rx = PM_GETRE(PL_curpm);
541 if (rx) {
542 register const I32 paren = mg->mg_len;
543 register I32 s;
544 register I32 t;
545 if (paren < 0)
546 return 0;
547 if (paren <= (I32)rx->nparens &&
f0ab9afb
NC
548 (s = rx->offs[paren].start) != -1 &&
549 (t = rx->offs[paren].end) != -1)
0bd48802
AL
550 {
551 register I32 i;
552 if (mg->mg_obj) /* @+ */
553 i = t;
554 else /* @- */
555 i = s;
556
557 if (i > 0 && RX_MATCH_UTF8(rx)) {
558 const char * const b = rx->subbeg;
559 if (b)
f5a63d97 560 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 561 }
727405f8 562
0bd48802 563 sv_setiv(sv, i);
1aa99e6b 564 }
0bd48802 565 }
6cef1e77
IZ
566 }
567 return 0;
568}
569
e4b89193 570int
a29d06ed
MG
571Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
572{
d4c19fe8
AL
573 PERL_UNUSED_ARG(sv);
574 PERL_UNUSED_ARG(mg);
a29d06ed 575 Perl_croak(aTHX_ PL_no_modify);
0dbb1585 576 NORETURN_FUNCTION_END;
a29d06ed
MG
577}
578
93a17b20 579U32
864dbfa3 580Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 581{
97aff369 582 dVAR;
93a17b20 583 register I32 paren;
93a17b20 584 register I32 i;
2fdbfb4d
AB
585 register const REGEXP * rx;
586 const char * const remaining = mg->mg_ptr + 1;
93a17b20
LW
587
588 switch (*mg->mg_ptr) {
2fdbfb4d
AB
589 case '\020':
590 if (*remaining == '\0') { /* ^P */
591 break;
592 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
593 goto do_prematch;
594 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
595 goto do_postmatch;
596 }
597 break;
598 case '\015': /* $^MATCH */
599 if (strEQ(remaining, "ATCH")) {
600 goto do_match;
601 } else {
602 break;
603 }
604 case '`':
605 do_prematch:
f1b875a0 606 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
607 goto maybegetparen;
608 case '\'':
609 do_postmatch:
f1b875a0 610 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
611 goto maybegetparen;
612 case '&':
613 do_match:
f1b875a0 614 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d 615 goto maybegetparen;
93a17b20 616 case '1': case '2': case '3': case '4':
2fdbfb4d
AB
617 case '5': case '6': case '7': case '8': case '9':
618 paren = atoi(mg->mg_ptr);
619 maybegetparen:
aaa362c4 620 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
621 getparen:
622 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 623
ffc61ed2 624 if (i < 0)
0844c848 625 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 626 return i;
2fdbfb4d 627 } else {
235bddc8 628 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 629 report_uninit(sv);
2fdbfb4d 630 return 0;
93a17b20 631 }
93a17b20 632 case '+':
aaa362c4 633 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 634 paren = rx->lastparen;
13f57bf8
CS
635 if (paren)
636 goto getparen;
93a17b20 637 }
748a9306 638 return 0;
a01268b5
JH
639 case '\016': /* ^N */
640 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
641 paren = rx->lastcloseparen;
642 if (paren)
643 goto getparen;
644 }
645 return 0;
93a17b20
LW
646 }
647 magic_get(sv,mg);
2d8e6c8d 648 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 649 sv_2pv(sv, 0);
2d8e6c8d 650 }
93a17b20
LW
651 if (SvPOK(sv))
652 return SvCUR(sv);
653 return 0;
654}
655
ad3296c6 656#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
657 if (SvPOK(sv)) { \
658 STRLEN len = SvCUR(sv); \
659 char * const p = SvPVX(sv); \
8e6b4db6
PC
660 while (len > 0 && isSPACE(p[len-1])) \
661 --len; \
662 SvCUR_set(sv, len); \
663 p[len] = '\0'; \
664 } \
ad3296c6
SH
665} STMT_END
666
8b850bd5
NC
667void
668Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
669{
670 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
671 sv_setsv(sv, &PL_sv_undef);
672 else {
673 sv_setpvs(sv, "");
674 SvUTF8_off(sv);
675 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
676 SV *const value = Perl_refcounted_he_fetch(aTHX_
677 c->cop_hints_hash,
678 0, "open<", 5, 0, 0);
679 assert(value);
680 sv_catsv(sv, value);
681 }
682 sv_catpvs(sv, "\0");
683 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
684 SV *const value = Perl_refcounted_he_fetch(aTHX_
685 c->cop_hints_hash,
686 0, "open>", 5, 0, 0);
687 assert(value);
688 sv_catsv(sv, value);
689 }
690 }
691}
692
79072805 693int
864dbfa3 694Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 695{
27da23d5 696 dVAR;
79072805 697 register I32 paren;
35272f84 698 register char *s = NULL;
d9f97599 699 register REGEXP *rx;
823a54a3
AL
700 const char * const remaining = mg->mg_ptr + 1;
701 const char nextchar = *remaining;
79072805
LW
702
703 switch (*mg->mg_ptr) {
748a9306 704 case '\001': /* ^A */
3280af22 705 sv_setsv(sv, PL_bodytarget);
748a9306 706 break;
e5218da5 707 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 708 if (nextchar == '\0') {
e5218da5
GA
709 sv_setiv(sv, (IV)PL_minus_c);
710 }
823a54a3 711 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
712 sv_setiv(sv, (IV)STATUS_NATIVE);
713 }
49460fe6
NIS
714 break;
715
79072805 716 case '\004': /* ^D */
aea4f609 717 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 718 break;
28f23441 719 case '\005': /* ^E */
823a54a3 720 if (nextchar == '\0') {
4b645107 721#if defined(MACOS_TRADITIONAL)
0a378802
JH
722 {
723 char msg[256];
727405f8 724
0a378802 725 sv_setnv(sv,(double)gMacPerl_OSErr);
727405f8 726 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
0a378802 727 }
4b645107 728#elif defined(VMS)
0a378802
JH
729 {
730# include <descrip.h>
731# include <starlet.h>
732 char msg[255];
733 $DESCRIPTOR(msgdsc,msg);
734 sv_setnv(sv,(NV) vaxc$errno);
735 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
736 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
737 else
c69006e4 738 sv_setpvn(sv,"",0);
0a378802 739 }
4b645107 740#elif defined(OS2)
0a378802
JH
741 if (!(_emx_env & 0x200)) { /* Under DOS */
742 sv_setnv(sv, (NV)errno);
743 sv_setpv(sv, errno ? Strerror(errno) : "");
744 } else {
745 if (errno != errno_isOS2) {
823a54a3 746 const int tmp = _syserrno();
0a378802
JH
747 if (tmp) /* 2nd call to _syserrno() makes it 0 */
748 Perl_rc = tmp;
749 }
750 sv_setnv(sv, (NV)Perl_rc);
751 sv_setpv(sv, os2error(Perl_rc));
752 }
4b645107 753#elif defined(WIN32)
0a378802 754 {
d4c19fe8 755 const DWORD dwErr = GetLastError();
0a378802 756 sv_setnv(sv, (NV)dwErr);
823a54a3 757 if (dwErr) {
0a378802
JH
758 PerlProc_GetOSError(sv, dwErr);
759 }
760 else
c69006e4 761 sv_setpvn(sv, "", 0);
0a378802
JH
762 SetLastError(dwErr);
763 }
22fae026 764#else
f6c8f21d 765 {
8772537c 766 const int saveerrno = errno;
f6c8f21d 767 sv_setnv(sv, (NV)errno);
666ea192 768 sv_setpv(sv, errno ? Strerror(errno) : "");
f6c8f21d
RGS
769 errno = saveerrno;
770 }
28f23441 771#endif
ad3296c6 772 SvRTRIM(sv);
0a378802
JH
773 SvNOK_on(sv); /* what a wonderful hack! */
774 }
823a54a3 775 else if (strEQ(remaining, "NCODING"))
0a378802
JH
776 sv_setsv(sv, PL_encoding);
777 break;
79072805 778 case '\006': /* ^F */
3280af22 779 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 780 break;
a0d0e21e 781 case '\010': /* ^H */
3280af22 782 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 783 break;
9d116dd7 784 case '\011': /* ^I */ /* NOT \t in EBCDIC */
3280af22
NIS
785 if (PL_inplace)
786 sv_setpv(sv, PL_inplace);
79072805 787 else
3280af22 788 sv_setsv(sv, &PL_sv_undef);
79072805 789 break;
ac27b0f5 790 case '\017': /* ^O & ^OPEN */
823a54a3 791 if (nextchar == '\0') {
ac27b0f5 792 sv_setpv(sv, PL_osname);
3511154c
DM
793 SvTAINTED_off(sv);
794 }
823a54a3 795 else if (strEQ(remaining, "PEN")) {
8b850bd5 796 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 797 }
28f23441 798 break;
cde0cee5
YO
799 case '\020':
800 if (nextchar == '\0') { /* ^P */
801 sv_setiv(sv, (IV)PL_perldb);
802 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
803 goto do_prematch_fetch;
804 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
805 goto do_postmatch_fetch;
806 }
79072805 807 break;
fb73857a 808 case '\023': /* ^S */
823a54a3 809 if (nextchar == '\0') {
bc177e6b 810 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 811 SvOK_off(sv);
3280af22 812 else if (PL_in_eval)
6dc8a9e4 813 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
814 else
815 sv_setiv(sv, 0);
d58bf5aa 816 }
fb73857a 817 break;
79072805 818 case '\024': /* ^T */
823a54a3 819 if (nextchar == '\0') {
88e89b8a 820#ifdef BIG_TIME
7c36658b 821 sv_setnv(sv, PL_basetime);
88e89b8a 822#else
7c36658b 823 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 824#endif
7c36658b 825 }
823a54a3 826 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
827 sv_setiv(sv, PL_tainting
828 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
829 : 0);
7c36658b 830 break;
e07ea26a 831 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 832 if (strEQ(remaining, "NICODE"))
a05d7ebb 833 sv_setuv(sv, (UV) PL_unicode);
823a54a3 834 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 835 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
836 else if (strEQ(remaining, "TF8CACHE"))
837 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
838 break;
839 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 840 if (nextchar == '\0')
4438c4b7 841 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 842 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 843 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 844 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
845 }
846 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH
847 sv_setpvn(
848 sv,
849 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
850 WARNsize
851 );
013b78e8 852 }
d3a7d8c7 853 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
854 /* Get the bit mask for $warnings::Bits{all}, because
855 * it could have been extended by warnings::register */
823a54a3 856 HV * const bits=get_hv("warnings::Bits", FALSE);
f5a63d97
AL
857 if (bits) {
858 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
859 if (bits_all)
860 sv_setsv(sv, *bits_all);
75b6c4ca
RGS
861 }
862 else {
863 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
864 }
ac27b0f5 865 }
4438c4b7 866 else {
72dc9ed5
NC
867 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
868 *PL_compiling.cop_warnings);
ac27b0f5 869 }
d3a7d8c7 870 SvPOK_only(sv);
4438c4b7 871 }
79072805 872 break;
cde0cee5
YO
873 case '\015': /* $^MATCH */
874 if (strEQ(remaining, "ATCH")) {
79072805
LW
875 case '1': case '2': case '3': case '4':
876 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
877 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
878 /*
879 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
880 * XXX Does the new way break anything?
881 */
882 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 883 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO
884 break;
885 }
886 sv_setsv(sv,&PL_sv_undef);
79072805
LW
887 }
888 break;
889 case '+':
aaa362c4 890 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 891 if (rx->lastparen) {
2fdbfb4d 892 CALLREG_NUMBUF_FETCH(rx,rx->lastparen,sv);
44a2ac75
YO
893 break;
894 }
79072805 895 }
3280af22 896 sv_setsv(sv,&PL_sv_undef);
79072805 897 break;
a01268b5
JH
898 case '\016': /* ^N */
899 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 900 if (rx->lastcloseparen) {
2fdbfb4d 901 CALLREG_NUMBUF_FETCH(rx,rx->lastcloseparen,sv);
44a2ac75
YO
902 break;
903 }
904
a01268b5
JH
905 }
906 sv_setsv(sv,&PL_sv_undef);
907 break;
79072805 908 case '`':
cde0cee5 909 do_prematch_fetch:
aaa362c4 910 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 911 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 912 break;
79072805 913 }
3280af22 914 sv_setsv(sv,&PL_sv_undef);
79072805
LW
915 break;
916 case '\'':
cde0cee5 917 do_postmatch_fetch:
aaa362c4 918 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 919 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 920 break;
79072805 921 }
3280af22 922 sv_setsv(sv,&PL_sv_undef);
79072805
LW
923 break;
924 case '.':
3280af22 925 if (GvIO(PL_last_in_gv)) {
357c8808 926 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 927 }
79072805
LW
928 break;
929 case '?':
809a5acc 930 {
809a5acc 931 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 932#ifdef COMPLEX_STATUS
6b88bc9c
GS
933 LvTARGOFF(sv) = PL_statusvalue;
934 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 935#endif
809a5acc 936 }
79072805
LW
937 break;
938 case '^':
0daa599b
RGS
939 if (GvIOp(PL_defoutgv))
940 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
941 if (s)
942 sv_setpv(sv,s);
943 else {
3280af22 944 sv_setpv(sv,GvENAME(PL_defoutgv));
79072805
LW
945 sv_catpv(sv,"_TOP");
946 }
947 break;
948 case '~':
0daa599b
RGS
949 if (GvIOp(PL_defoutgv))
950 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 951 if (!s)
3280af22 952 s = GvENAME(PL_defoutgv);
79072805
LW
953 sv_setpv(sv,s);
954 break;
79072805 955 case '=':
0daa599b
RGS
956 if (GvIOp(PL_defoutgv))
957 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
958 break;
959 case '-':
0daa599b
RGS
960 if (GvIOp(PL_defoutgv))
961 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
962 break;
963 case '%':
0daa599b
RGS
964 if (GvIOp(PL_defoutgv))
965 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 966 break;
79072805
LW
967 case ':':
968 break;
969 case '/':
970 break;
971 case '[':
11206fdd 972 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW
973 break;
974 case '|':
0daa599b
RGS
975 if (GvIOp(PL_defoutgv))
976 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
977 break;
978 case ',':
79072805
LW
979 break;
980 case '\\':
b2ce0fda 981 if (PL_ors_sv)
f28098ff 982 sv_copypv(sv, PL_ors_sv);
79072805 983 break;
79072805 984 case '!':
a5f75d66 985#ifdef VMS
65202027 986 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 987 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 988#else
88e89b8a 989 {
8772537c 990 const int saveerrno = errno;
65202027 991 sv_setnv(sv, (NV)errno);
88e89b8a 992#ifdef OS2
ed344e4f
IZ
993 if (errno == errno_isOS2 || errno == errno_isOS2_set)
994 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 995 else
a5f75d66 996#endif
666ea192 997 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
998 errno = saveerrno;
999 }
1000#endif
ad3296c6 1001 SvRTRIM(sv);
946ec16e 1002 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1003 break;
1004 case '<':
3280af22 1005 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1006 break;
1007 case '>':
3280af22 1008 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1009 break;
1010 case '(':
3280af22 1011 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1012 goto add_groups;
1013 case ')':
3280af22 1014 sv_setiv(sv, (IV)PL_egid);
79072805 1015 add_groups:
79072805 1016#ifdef HAS_GETGROUPS
79072805 1017 {
57d7c65e 1018 Groups_t *gary = NULL;
fb45abb2 1019 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1020 Newx(gary, num_groups, Groups_t);
1021 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1022 for (i = 0; i < num_groups; i++)
1023 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1024 Safefree(gary);
79072805 1025 }
155aba94 1026 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1027#endif
79072805 1028 break;
cd39f2b6 1029#ifndef MACOS_TRADITIONAL
79072805
LW
1030 case '0':
1031 break;
cd39f2b6 1032#endif
79072805 1033 }
a0d0e21e 1034 return 0;
79072805
LW
1035}
1036
1037int
864dbfa3 1038Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1039{
8772537c 1040 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1041
1042 if (uf && uf->uf_val)
24f81a43 1043 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1044 return 0;
1045}
1046
1047int
864dbfa3 1048Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1049{
27da23d5 1050 dVAR;
9ae3433d 1051 STRLEN len = 0, klen;
666ea192 1052 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1053 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1054 my_setenv(ptr, s);
1e422769 1055
a0d0e21e
LW
1056#ifdef DYNAMIC_ENV_FETCH
1057 /* We just undefd an environment var. Is a replacement */
1058 /* waiting in the wings? */
1059 if (!len) {
fabdb6c0
AL
1060 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1061 if (valp)
4ab59fcc 1062 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1063 }
1064#endif
1e422769 1065
39e571d4 1066#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1067 /* And you'll never guess what the dog had */
1068 /* in its mouth... */
3280af22 1069 if (PL_tainting) {
1e422769
PP
1070 MgTAINTEDDIR_off(mg);
1071#ifdef VMS
5aabfad6 1072 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1073 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1074 Stat_t sbuf;
1e422769
PP
1075 int i = 0, j = 0;
1076
6fca0082 1077 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1078 elt = eltbuf;
1e422769
PP
1079 do { /* DCL$PATH may be a search list */
1080 while (1) { /* as may dev portion of any element */
1081 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1082 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1083 cando_by_name(S_IWUSR,0,elt) ) {
1084 MgTAINTEDDIR_on(mg);
1085 return 0;
1086 }
1087 }
bd61b366 1088 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1089 *cp = '\0';
1090 if (my_trnlnm(elt, eltbuf, j++))
1091 elt = eltbuf;
1092 else
1093 break;
1094 }
1095 j = 0;
1096 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1097 }
1098#endif /* VMS */
5aabfad6 1099 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1100 const char * const strend = s + len;
463ee0b2
LW
1101
1102 while (s < strend) {
96827780 1103 char tmpbuf[256];
c623ac67 1104 Stat_t st;
5f74f29c 1105 I32 i;
f5a63d97
AL
1106#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1107 const char path_sep = '|';
1108#else
1109 const char path_sep = ':';
1110#endif
96827780 1111 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1112 s, strend, path_sep, &i);
463ee0b2 1113 s++;
bb7a0f54 1114 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1115#ifdef VMS
1116 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1117#else
1118 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1119#endif
c6ed36e1 1120 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1121 MgTAINTEDDIR_on(mg);
1e422769
PP
1122 return 0;
1123 }
463ee0b2 1124 }
79072805
LW
1125 }
1126 }
39e571d4 1127#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1128
79072805
LW
1129 return 0;
1130}
1131
1132int
864dbfa3 1133Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1134{
8772537c 1135 PERL_UNUSED_ARG(sv);
bd61b366 1136 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1137 return 0;
1138}
1139
88e89b8a 1140int
864dbfa3 1141Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1142{
97aff369 1143 dVAR;
65e66c80 1144 PERL_UNUSED_ARG(mg);
b0269e46 1145#if defined(VMS)
cea2e8a9 1146 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1147#else
3280af22 1148 if (PL_localizing) {
fb73857a 1149 HE* entry;
b0269e46 1150 my_clearenv();
fb73857a 1151 hv_iterinit((HV*)sv);
155aba94 1152 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1153 I32 keylen;
1154 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1155 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1156 }
1157 }
1158#endif
1159 return 0;
1160}
1161
1162int
864dbfa3 1163Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1164{
27da23d5 1165 dVAR;
8772537c
AL
1166 PERL_UNUSED_ARG(sv);
1167 PERL_UNUSED_ARG(mg);
b0269e46
AB
1168#if defined(VMS)
1169 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1170#else
1171 my_clearenv();
1172#endif
3e3baf6d 1173 return 0;
66b1d557
HM
1174}
1175
64ca3a65 1176#ifndef PERL_MICRO
2d4fcd5e
AJ
1177#ifdef HAS_SIGPROCMASK
1178static void
1179restore_sigmask(pTHX_ SV *save_sv)
1180{
0bd48802 1181 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1182 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1183}
1184#endif
66b1d557 1185int
864dbfa3 1186Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1187{
97aff369 1188 dVAR;
88e89b8a 1189 /* Are we fetching a signal entry? */
8772537c 1190 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1191 if (i > 0) {
22c35a8c
GS
1192 if(PL_psig_ptr[i])
1193 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1194 else {
46da273f 1195 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1196#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1197 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1198 sigstate = SIG_IGN;
2e34cc90
CL
1199#endif
1200#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1201 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1202 sigstate = SIG_DFL;
85b332e2 1203#endif
88e89b8a 1204 /* cache state so we don't fetch it again */
8aad04aa 1205 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1206 sv_setpvs(sv,"IGNORE");
88e89b8a 1207 else
3280af22 1208 sv_setsv(sv,&PL_sv_undef);
46da273f 1209 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1210 SvTEMP_off(sv);
1211 }
1212 }
1213 return 0;
1214}
1215int
864dbfa3 1216Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1217{
2d4fcd5e
AJ
1218 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1219 * refactoring might be in order.
1220 */
27da23d5 1221 dVAR;
8772537c
AL
1222 register const char * const s = MgPV_nolen_const(mg);
1223 PERL_UNUSED_ARG(sv);
2d4fcd5e 1224 if (*s == '_') {
cbbf8932 1225 SV** svp = NULL;
2d4fcd5e
AJ
1226 if (strEQ(s,"__DIE__"))
1227 svp = &PL_diehook;
b274dc4e 1228 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
2d4fcd5e 1229 svp = &PL_warnhook;
27da23d5 1230 if (svp && *svp) {
b274dc4e 1231 SV *const to_dec = *svp;
cbbf8932 1232 *svp = NULL;
b274dc4e 1233 SvREFCNT_dec(to_dec);
2d4fcd5e
AJ
1234 }
1235 }
1236 else {
2d4fcd5e 1237 /* Are we clearing a signal entry? */
8772537c 1238 const I32 i = whichsig(s);
e02bfb16 1239 if (i > 0) {
2d4fcd5e
AJ
1240#ifdef HAS_SIGPROCMASK
1241 sigset_t set, save;
1242 SV* save_sv;
1243 /* Avoid having the signal arrive at a bad time, if possible. */
1244 sigemptyset(&set);
1245 sigaddset(&set,i);
1246 sigprocmask(SIG_BLOCK, &set, &save);
1247 ENTER;
1248 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1249 SAVEFREESV(save_sv);
1250 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1251#endif
1252 PERL_ASYNC_CHECK();
1253#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1254 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1255#endif
1256#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1257 PL_sig_defaulting[i] = 1;
5c1546dc 1258 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1259#else
8aad04aa 1260 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1261#endif
1262 if(PL_psig_name[i]) {
1263 SvREFCNT_dec(PL_psig_name[i]);
1264 PL_psig_name[i]=0;
1265 }
1266 if(PL_psig_ptr[i]) {
6136c704 1267 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1268 PL_psig_ptr[i]=0;
1269 LEAVE;
1270 SvREFCNT_dec(to_dec);
1271 }
1272 else
1273 LEAVE;
1274 }
88e89b8a
PP
1275 }
1276 return 0;
1277}
3d37d572 1278
acd15b85
CB
1279/*
1280 * The signal handling nomenclature has gotten a bit confusing since the advent of
1281 * safe signals. S_raise_signal only raises signals by analogy with what the
1282 * underlying system's signal mechanism does. It might be more proper to say that
1283 * it defers signals that have already been raised and caught.
1284 *
1285 * PL_sig_pending and PL_psig_pend likewise do not track signals that are pending
1286 * in the sense of being on the system's signal queue in between raising and delivery.
1287 * They are only pending on Perl's deferral list, i.e., they track deferred signals
1288 * awaiting delivery after the current Perl opcode completes and say nothing about
1289 * signals raised but not yet caught in the underlying signal implementation.
1290 */
1291
2563cec5
IZ
1292#ifndef SIG_PENDING_DIE_COUNT
1293# define SIG_PENDING_DIE_COUNT 120
1294#endif
1295
dd374669
AL
1296static void
1297S_raise_signal(pTHX_ int sig)
0a8e0eff 1298{
97aff369 1299 dVAR;
0a8e0eff
NIS
1300 /* Set a flag to say this signal is pending */
1301 PL_psig_pend[sig]++;
1302 /* And one to say _a_ signal is pending */
2563cec5
IZ
1303 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1304 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1305 (unsigned long)SIG_PENDING_DIE_COUNT);
0a8e0eff
NIS
1306}
1307
1308Signal_t
8aad04aa
JH
1309#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1310Perl_csighandler(int sig, ...)
1311#else
0a8e0eff 1312Perl_csighandler(int sig)
8aad04aa 1313#endif
0a8e0eff 1314{
1018e26f
NIS
1315#ifdef PERL_GET_SIG_CONTEXT
1316 dTHXa(PERL_GET_SIG_CONTEXT);
1317#else
85b332e2
CL
1318 dTHX;
1319#endif
fe5bfecd
JH
1320#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1321 va_list args;
1322#endif
23ada85b 1323#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1324 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1325 if (PL_sig_ignoring[sig]) return;
85b332e2 1326#endif
2e34cc90 1327#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1328 if (PL_sig_defaulting[sig])
2e34cc90
CL
1329#ifdef KILL_BY_SIGPRC
1330 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1331#else
1332 exit(1);
1333#endif
1334#endif
fe5bfecd
JH
1335#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1336 va_start(args, sig);
1337#endif
853d2c32
RGS
1338 if (
1339#ifdef SIGILL
1340 sig == SIGILL ||
1341#endif
1342#ifdef SIGBUS
1343 sig == SIGBUS ||
1344#endif
1345#ifdef SIGSEGV
1346 sig == SIGSEGV ||
1347#endif
1348 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3
JH
1349 /* Call the perl level handler now--
1350 * with risk we may be in malloc() etc. */
1351 (*PL_sighandlerp)(sig);
1352 else
dd374669 1353 S_raise_signal(aTHX_ sig);
fe5bfecd
JH
1354#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1355 va_end(args);
1356#endif
0a8e0eff
NIS
1357}
1358
2e34cc90
CL
1359#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1360void
1361Perl_csighandler_init(void)
1362{
1363 int sig;
27da23d5 1364 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1365
1366 for (sig = 1; sig < SIG_SIZE; sig++) {
1367#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1368 dTHX;
27da23d5 1369 PL_sig_defaulting[sig] = 1;
5c1546dc 1370 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1371#endif
1372#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1373 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1374#endif
1375 }
27da23d5 1376 PL_sig_handlers_initted = 1;
2e34cc90
CL
1377}
1378#endif
1379
0a8e0eff
NIS
1380void
1381Perl_despatch_signals(pTHX)
1382{
97aff369 1383 dVAR;
0a8e0eff
NIS
1384 int sig;
1385 PL_sig_pending = 0;
1386 for (sig = 1; sig < SIG_SIZE; sig++) {
1387 if (PL_psig_pend[sig]) {
25da4428
JH
1388 PERL_BLOCKSIG_ADD(set, sig);
1389 PL_psig_pend[sig] = 0;
1390 PERL_BLOCKSIG_BLOCK(set);
f5203343 1391 (*PL_sighandlerp)(sig);
25da4428 1392 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1393 }
1394 }
1395}
1396
85e6fe83 1397int
864dbfa3 1398Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1399{
27da23d5 1400 dVAR;
79072805 1401 I32 i;
cbbf8932 1402 SV** svp = NULL;
2d4fcd5e
AJ
1403 /* Need to be careful with SvREFCNT_dec(), because that can have side
1404 * effects (due to closures). We must make sure that the new disposition
1405 * is in place before it is called.
1406 */
cbbf8932 1407 SV* to_dec = NULL;
e72dc28c 1408 STRLEN len;
2d4fcd5e
AJ
1409#ifdef HAS_SIGPROCMASK
1410 sigset_t set, save;
1411 SV* save_sv;
1412#endif
a0d0e21e 1413
d5263905 1414 register const char *s = MgPV_const(mg,len);
748a9306
LW
1415 if (*s == '_') {
1416 if (strEQ(s,"__DIE__"))
3280af22 1417 svp = &PL_diehook;
748a9306 1418 else if (strEQ(s,"__WARN__"))
3280af22 1419 svp = &PL_warnhook;
748a9306 1420 else
cea2e8a9 1421 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1422 i = 0;
4633a7c4 1423 if (*svp) {
9289f461
RGS
1424 if (*svp != PERL_WARNHOOK_FATAL)
1425 to_dec = *svp;
cbbf8932 1426 *svp = NULL;
4633a7c4 1427 }
748a9306
LW
1428 }
1429 else {
1430 i = whichsig(s); /* ...no, a brick */
86d86cad 1431 if (i <= 0) {
e476b1b5 1432 if (ckWARN(WARN_SIGNAL))
9014280d 1433 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1434 return 0;
1435 }
2d4fcd5e
AJ
1436#ifdef HAS_SIGPROCMASK
1437 /* Avoid having the signal arrive at a bad time, if possible. */
1438 sigemptyset(&set);
1439 sigaddset(&set,i);
1440 sigprocmask(SIG_BLOCK, &set, &save);
1441 ENTER;
1442 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1443 SAVEFREESV(save_sv);
1444 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1445#endif
1446 PERL_ASYNC_CHECK();
2e34cc90 1447#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1448 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1449#endif
23ada85b 1450#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1451 PL_sig_ignoring[i] = 0;
85b332e2 1452#endif
2e34cc90 1453#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1454 PL_sig_defaulting[i] = 0;
2e34cc90 1455#endif
22c35a8c 1456 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1457 to_dec = PL_psig_ptr[i];
46da273f 1458 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1459 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1460 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1461 SvREADONLY_on(PL_psig_name[i]);
748a9306 1462 }
a0d0e21e 1463 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1464 if (i) {
5c1546dc 1465 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1466#ifdef HAS_SIGPROCMASK
1467 LEAVE;
1468#endif
1469 }
748a9306 1470 else
b37c2d43 1471 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1472 if(to_dec)
1473 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1474 return 0;
1475 }
baf38871 1476 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
748a9306 1477 if (strEQ(s,"IGNORE")) {
85b332e2 1478 if (i) {
23ada85b 1479#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1480 PL_sig_ignoring[i] = 1;
5c1546dc 1481 (void)rsignal(i, PL_csighandlerp);
85b332e2 1482#else
8aad04aa 1483 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1484#endif
2d4fcd5e 1485 }
748a9306
LW
1486 }
1487 else if (strEQ(s,"DEFAULT") || !*s) {
1488 if (i)
2e34cc90
CL
1489#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1490 {
27da23d5 1491 PL_sig_defaulting[i] = 1;
5c1546dc 1492 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1493 }
1494#else
8aad04aa 1495 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1496#endif
748a9306 1497 }
79072805 1498 else {
5aabfad6
PP
1499 /*
1500 * We should warn if HINT_STRICT_REFS, but without
1501 * access to a known hint bit in a known OP, we can't
1502 * tell whether HINT_STRICT_REFS is in force or not.
1503 */
46fc3d4c 1504 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1505 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1506 if (i)
5c1546dc 1507 (void)rsignal(i, PL_csighandlerp);
748a9306 1508 else
46da273f 1509 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1510 }
2d4fcd5e
AJ
1511#ifdef HAS_SIGPROCMASK
1512 if(i)
1513 LEAVE;
1514#endif
1515 if(to_dec)
1516 SvREFCNT_dec(to_dec);
79072805
LW
1517 return 0;
1518}
64ca3a65 1519#endif /* !PERL_MICRO */
79072805
LW
1520
1521int
864dbfa3 1522Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1523{
97aff369 1524 dVAR;
08aeb9f7 1525 HV* stash;
8772537c 1526 PERL_UNUSED_ARG(sv);
e1a479c5 1527
08aeb9f7
BB
1528 /* Bail out if destruction is going on */
1529 if(PL_dirty) return 0;
1530
70cd14a1
CB
1531 /* XXX Once it's possible, we need to
1532 detect that our @ISA is aliased in
1533 other stashes, and act on the stashes
1534 of all of the aliases */
1535
e1a479c5
BB
1536 /* The first case occurs via setisa,
1537 the second via setisa_elem, which
1538 calls this same magic */
08aeb9f7
BB
1539 stash = GvSTASH(
1540 SvTYPE(mg->mg_obj) == SVt_PVGV
1541 ? (GV*)mg->mg_obj
1542 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
e1a479c5
BB
1543 );
1544
08aeb9f7
BB
1545 if(PL_delaymagic)
1546 PL_delayedisa = stash;
1547 else
1548 mro_isa_changed_in(stash);
1549
463ee0b2
LW
1550 return 0;
1551}
1552
1553int
864dbfa3 1554Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1555{
97aff369 1556 dVAR;
8772537c
AL
1557 PERL_UNUSED_ARG(sv);
1558 PERL_UNUSED_ARG(mg);
3280af22 1559 PL_amagic_generation++;
463ee0b2 1560
a0d0e21e
LW
1561 return 0;
1562}
463ee0b2 1563
946ec16e 1564int
864dbfa3 1565Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1566{
dd374669 1567 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1568 I32 i = 0;
8772537c 1569 PERL_UNUSED_ARG(mg);
7719e241 1570
6ff81951 1571 if (hv) {
497b47a8
JH
1572 (void) hv_iterinit(hv);
1573 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1574 i = HvKEYS(hv);
1575 else {
1576 while (hv_iternext(hv))
1577 i++;
1578 }
6ff81951
GS
1579 }
1580
1581 sv_setiv(sv, (IV)i);
1582 return 0;
1583}
1584
1585int
864dbfa3 1586Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1587{
8772537c 1588 PERL_UNUSED_ARG(mg);
946ec16e
PP
1589 if (LvTARG(sv)) {
1590 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1591 }
1592 return 0;
ac27b0f5 1593}
946ec16e 1594
e336de0d 1595/* caller is responsible for stack switching/cleanup */
565764a8 1596STATIC int
e1ec3a88 1597S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1598{
97aff369 1599 dVAR;
a0d0e21e 1600 dSP;
463ee0b2 1601
924508f0
GS
1602 PUSHMARK(SP);
1603 EXTEND(SP, n);
33c27489 1604 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1605 if (n > 1) {
93965878 1606 if (mg->mg_ptr) {
565764a8 1607 if (mg->mg_len >= 0)
79cb57f6 1608 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1609 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1610 PUSHs((SV*)mg->mg_ptr);
1611 }
14befaf4 1612 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1613 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1614 }
1615 }
1616 if (n > 2) {
1617 PUSHs(val);
88e89b8a 1618 }
463ee0b2
LW
1619 PUTBACK;
1620
864dbfa3 1621 return call_method(meth, flags);
946ec16e
PP
1622}
1623
76e3520e 1624STATIC int
e1ec3a88 1625S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1626{
27da23d5 1627 dVAR; dSP;
463ee0b2 1628
a0d0e21e
LW
1629 ENTER;
1630 SAVETMPS;
e788e7d3 1631 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1632
33c27489 1633 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1634 sv_setsv(sv, *PL_stack_sp--);
93965878 1635 }
463ee0b2 1636
d3acc0f7 1637 POPSTACK;
a0d0e21e
LW
1638 FREETMPS;
1639 LEAVE;
1640 return 0;
1641}
463ee0b2 1642
a0d0e21e 1643int
864dbfa3 1644Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1645{
a0d0e21e
LW
1646 if (mg->mg_ptr)
1647 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1648 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1649 return 0;
1650}
1651
1652int
864dbfa3 1653Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1654{
27da23d5 1655 dVAR; dSP;
a60c0954 1656 ENTER;
e788e7d3 1657 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1658 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1659 POPSTACK;
a60c0954 1660 LEAVE;
463ee0b2
LW
1661 return 0;
1662}
1663
1664int
864dbfa3 1665Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1666{
a0d0e21e
LW
1667 return magic_methpack(sv,mg,"DELETE");
1668}
463ee0b2 1669
93965878
NIS
1670
1671U32
864dbfa3 1672Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1673{
27da23d5 1674 dVAR; dSP;
22846ab4 1675 I32 retval = 0;
93965878
NIS
1676
1677 ENTER;
1678 SAVETMPS;
e788e7d3 1679 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1680 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1681 sv = *PL_stack_sp--;
22846ab4
AB
1682 retval = SvIV(sv)-1;
1683 if (retval < -1)
1684 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1685 }
d3acc0f7 1686 POPSTACK;
93965878
NIS
1687 FREETMPS;
1688 LEAVE;
22846ab4 1689 return (U32) retval;
93965878
NIS
1690}
1691
cea2e8a9
GS
1692int
1693Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1694{
27da23d5 1695 dVAR; dSP;
463ee0b2 1696
e336de0d 1697 ENTER;
e788e7d3 1698 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1699 PUSHMARK(SP);
33c27489 1700 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1701 PUTBACK;
864dbfa3 1702 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1703 POPSTACK;
a60c0954 1704 LEAVE;
a3bcc51e 1705
463ee0b2
LW
1706 return 0;
1707}
1708
1709int
864dbfa3 1710Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1711{
27da23d5 1712 dVAR; dSP;
666ea192 1713 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1714
1715 ENTER;
a0d0e21e 1716 SAVETMPS;
e788e7d3 1717 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1718 PUSHMARK(SP);
1719 EXTEND(SP, 2);
33c27489 1720 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1721 if (SvOK(key))
1722 PUSHs(key);
1723 PUTBACK;
1724
864dbfa3 1725 if (call_method(meth, G_SCALAR))
3280af22 1726 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1727
d3acc0f7 1728 POPSTACK;
a0d0e21e
LW
1729 FREETMPS;
1730 LEAVE;
79072805
LW
1731 return 0;
1732}
1733
1734int
1146e912 1735Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1736{
1737 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1738}
a0d0e21e 1739
a3bcc51e
TP
1740SV *
1741Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1742{
27da23d5 1743 dVAR; dSP;
5fcbf73d 1744 SV *retval;
8772537c
AL
1745 SV * const tied = SvTIED_obj((SV*)hv, mg);
1746 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1747
1748 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1749 SV *key;
bfcb3514 1750 if (HvEITER_get(hv))
a3bcc51e
TP
1751 /* we are in an iteration so the hash cannot be empty */
1752 return &PL_sv_yes;
1753 /* no xhv_eiter so now use FIRSTKEY */
1754 key = sv_newmortal();
1755 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1756 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1757 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1758 }
1759
1760 /* there is a SCALAR method that we can call */
1761 ENTER;
1762 PUSHSTACKi(PERLSI_MAGIC);
1763 PUSHMARK(SP);
1764 EXTEND(SP, 1);
1765 PUSHs(tied);
1766 PUTBACK;
1767
1768 if (call_method("SCALAR", G_SCALAR))
1769 retval = *PL_stack_sp--;
5fcbf73d
AL
1770 else
1771 retval = &PL_sv_undef;
a3bcc51e
TP
1772 POPSTACK;
1773 LEAVE;
1774 return retval;
1775}
1776
a0d0e21e 1777int
864dbfa3 1778Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1779{
97aff369 1780 dVAR;
8772537c
AL
1781 GV * const gv = PL_DBline;
1782 const I32 i = SvTRUE(sv);
1783 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1784 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1785 if (svp && SvIOKp(*svp)) {
1786 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1787 if (o) {
1788 /* set or clear breakpoint in the relevant control op */
1789 if (i)
1790 o->op_flags |= OPf_SPECIAL;
1791 else
1792 o->op_flags &= ~OPf_SPECIAL;
1793 }
5df8de69 1794 }
79072805
LW
1795 return 0;
1796}
1797
1798int
8772537c 1799Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1800{
97aff369 1801 dVAR;
8772537c 1802 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1803 if (obj) {
fc15ae8f 1804 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1805 } else {
1806 SvOK_off(sv);
1807 }
79072805
LW
1808 return 0;
1809}
1810
1811int
864dbfa3 1812Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1813{
97aff369 1814 dVAR;
8772537c 1815 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1816 if (obj) {
fc15ae8f 1817 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1818 } else {
1819 if (ckWARN(WARN_MISC))
1820 Perl_warner(aTHX_ packWARN(WARN_MISC),
1821 "Attempt to set length of freed array");
1822 }
1823 return 0;
1824}
1825
1826int
1827Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1828{
97aff369 1829 dVAR;
53c1dcc0 1830 PERL_UNUSED_ARG(sv);
94f3782b
DM
1831 /* during global destruction, mg_obj may already have been freed */
1832 if (PL_in_clean_all)
1ea47f64 1833 return 0;
94f3782b 1834
83bf042f
NC
1835 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1836
1837 if (mg) {
1838 /* arylen scalar holds a pointer back to the array, but doesn't own a
1839 reference. Hence the we (the array) are about to go away with it
1840 still pointing at us. Clear its pointer, else it would be pointing
1841 at free memory. See the comment in sv_magic about reference loops,
1842 and why it can't own a reference to us. */
1843 mg->mg_obj = 0;
1844 }
a0d0e21e
LW
1845 return 0;
1846}
1847
1848int
864dbfa3 1849Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1850{
97aff369 1851 dVAR;
8772537c 1852 SV* const lsv = LvTARG(sv);
3881461a 1853 PERL_UNUSED_ARG(mg);
ac27b0f5 1854
a0d0e21e 1855 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1856 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1857 if (found && found->mg_len >= 0) {
1858 I32 i = found->mg_len;
7e2040f0 1859 if (DO_UTF8(lsv))
a0ed51b3 1860 sv_pos_b2u(lsv, &i);
fc15ae8f 1861 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1862 return 0;
1863 }
1864 }
0c34ef67 1865 SvOK_off(sv);
a0d0e21e
LW
1866 return 0;
1867}
1868
1869int
864dbfa3 1870Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1871{
97aff369 1872 dVAR;
8772537c 1873 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1874 SSize_t pos;
1875 STRLEN len;
c00206c8 1876 STRLEN ulen = 0;
53d44271 1877 MAGIC* found;
a0d0e21e 1878
3881461a 1879 PERL_UNUSED_ARG(mg);
ac27b0f5 1880
a0d0e21e 1881 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1882 found = mg_find(lsv, PERL_MAGIC_regex_global);
1883 else
1884 found = NULL;
1885 if (!found) {
a0d0e21e
LW
1886 if (!SvOK(sv))
1887 return 0;
d83f0a82
NC
1888#ifdef PERL_OLD_COPY_ON_WRITE
1889 if (SvIsCOW(lsv))
1890 sv_force_normal_flags(lsv, 0);
1891#endif
3881461a 1892 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1893 NULL, 0);
a0d0e21e
LW
1894 }
1895 else if (!SvOK(sv)) {
3881461a 1896 found->mg_len = -1;
a0d0e21e
LW
1897 return 0;
1898 }
1899 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1900
fc15ae8f 1901 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1902
7e2040f0 1903 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1904 ulen = sv_len_utf8(lsv);
1905 if (ulen)
1906 len = ulen;
a0ed51b3
LW
1907 }
1908
a0d0e21e
LW
1909 if (pos < 0) {
1910 pos += len;
1911 if (pos < 0)
1912 pos = 0;
1913 }
eb160463 1914 else if (pos > (SSize_t)len)
a0d0e21e 1915 pos = len;
a0ed51b3
LW
1916
1917 if (ulen) {
1918 I32 p = pos;
1919 sv_pos_u2b(lsv, &p, 0);
1920 pos = p;
1921 }
727405f8 1922
3881461a
AL
1923 found->mg_len = pos;
1924 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1925
79072805
LW
1926 return 0;
1927}
1928
1929int
864dbfa3 1930Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1931{
79072805 1932 GV* gv;
8772537c
AL
1933 PERL_UNUSED_ARG(mg);
1934
dd69841b
BB
1935 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1936
79072805
LW
1937 if (!SvOK(sv))
1938 return 0;
2e5b91de 1939 if (isGV_with_GP(sv)) {
180488f8
NC
1940 /* We're actually already a typeglob, so don't need the stuff below.
1941 */
1942 return 0;
1943 }
f776e3cd 1944 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1945 if (sv == (SV*)gv)
1946 return 0;
1947 if (GvGP(sv))
88e89b8a 1948 gp_free((GV*)sv);
79072805 1949 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1950 return 0;
1951}
1952
1953int
864dbfa3 1954Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1955{
1956 STRLEN len;
35a4481c 1957 SV * const lsv = LvTARG(sv);
b83604b4 1958 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1959 I32 offs = LvTARGOFF(sv);
1960 I32 rem = LvTARGLEN(sv);
8772537c 1961 PERL_UNUSED_ARG(mg);
6ff81951 1962
9aa983d2
JH
1963 if (SvUTF8(lsv))
1964 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1965 if (offs > (I32)len)
6ff81951 1966 offs = len;
eb160463 1967 if (rem + offs > (I32)len)
6ff81951
GS
1968 rem = len - offs;
1969 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1970 if (SvUTF8(lsv))
2ef4b674 1971 SvUTF8_on(sv);
6ff81951
GS
1972 return 0;
1973}
1974
1975int
864dbfa3 1976Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1977{
97aff369 1978 dVAR;
9aa983d2 1979 STRLEN len;
5fcbf73d 1980 const char * const tmps = SvPV_const(sv, len);
dd374669 1981 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1982 I32 lvoff = LvTARGOFF(sv);
1983 I32 lvlen = LvTARGLEN(sv);
8772537c 1984 PERL_UNUSED_ARG(mg);
075a4a2b 1985
1aa99e6b 1986 if (DO_UTF8(sv)) {
9aa983d2
JH
1987 sv_utf8_upgrade(lsv);
1988 sv_pos_u2b(lsv, &lvoff, &lvlen);
1989 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1990 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1991 SvUTF8_on(lsv);
1992 }
9bf12eaf 1993 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1994 const char *utf8;
9aa983d2 1995 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1996 LvTARGLEN(sv) = len;
5fcbf73d
AL
1997 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1998 sv_insert(lsv, lvoff, lvlen, utf8, len);
1999 Safefree(utf8);
1aa99e6b 2000 }
b76f3ce2
GB
2001 else {
2002 sv_insert(lsv, lvoff, lvlen, tmps, len);
2003 LvTARGLEN(sv) = len;
2004 }
2005
1aa99e6b 2006
79072805
LW
2007 return 0;
2008}
2009
2010int
864dbfa3 2011Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2012{
97aff369 2013 dVAR;
8772537c 2014 PERL_UNUSED_ARG(sv);
27cc343c 2015 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2016 return 0;
2017}
2018
2019int
864dbfa3 2020Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2021{
97aff369 2022 dVAR;
8772537c 2023 PERL_UNUSED_ARG(sv);
b01e650a
DM
2024 /* update taint status */
2025 if (PL_tainted)
2026 mg->mg_len |= 1;
2027 else
2028 mg->mg_len &= ~1;
463ee0b2
LW
2029 return 0;
2030}
2031
2032int
864dbfa3 2033Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2034{
35a4481c 2035 SV * const lsv = LvTARG(sv);
8772537c 2036 PERL_UNUSED_ARG(mg);
6ff81951 2037
6136c704
AL
2038 if (lsv)
2039 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2040 else
0c34ef67 2041 SvOK_off(sv);
6ff81951 2042
6ff81951
GS
2043 return 0;
2044}
2045
2046int
864dbfa3 2047Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2048{
8772537c 2049 PERL_UNUSED_ARG(mg);
79072805
LW
2050 do_vecset(sv); /* XXX slurp this routine */
2051 return 0;
2052}
2053
2054int
864dbfa3 2055Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2056{
97aff369 2057 dVAR;
a0714e2c 2058 SV *targ = NULL;
5f05dabc 2059 if (LvTARGLEN(sv)) {
68dc0745 2060 if (mg->mg_obj) {
8772537c
AL
2061 SV * const ahv = LvTARG(sv);
2062 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2063 if (he)
2064 targ = HeVAL(he);
68dc0745
PP
2065 }
2066 else {
8772537c 2067 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2068 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2069 targ = AvARRAY(av)[LvTARGOFF(sv)];
2070 }
46da273f 2071 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2072 /* somebody else defined it for us */
2073 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2074 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2075 LvTARGLEN(sv) = 0;
2076 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2077 mg->mg_obj = NULL;
68dc0745
PP
2078 mg->mg_flags &= ~MGf_REFCOUNTED;
2079 }
5f05dabc 2080 }
71be2cbc
PP
2081 else
2082 targ = LvTARG(sv);
3280af22 2083 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2084 return 0;
2085}
2086
2087int
864dbfa3 2088Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2089{
8772537c 2090 PERL_UNUSED_ARG(mg);
71be2cbc 2091 if (LvTARGLEN(sv))
68dc0745
PP
2092 vivify_defelem(sv);
2093 if (LvTARG(sv)) {
5f05dabc 2094 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2095 SvSETMAGIC(LvTARG(sv));
2096 }
5f05dabc
PP
2097 return 0;
2098}
2099
71be2cbc 2100void
864dbfa3 2101Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2102{
97aff369 2103 dVAR;
74e13ce4 2104 MAGIC *mg;
a0714e2c 2105 SV *value = NULL;
71be2cbc 2106
14befaf4 2107 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2108 return;
68dc0745 2109 if (mg->mg_obj) {
8772537c
AL
2110 SV * const ahv = LvTARG(sv);
2111 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2112 if (he)
2113 value = HeVAL(he);
3280af22 2114 if (!value || value == &PL_sv_undef)
be2597df 2115 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2116 }
68dc0745 2117 else {
8772537c 2118 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2119 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2120 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2121 else {
d4c19fe8 2122 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2123 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2124 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2125 }
2126 }
b37c2d43 2127 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2128 SvREFCNT_dec(LvTARG(sv));
2129 LvTARG(sv) = value;
71be2cbc 2130 LvTARGLEN(sv) = 0;
68dc0745 2131 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2132 mg->mg_obj = NULL;
68dc0745 2133 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2134}
2135
2136int
864dbfa3 2137Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2138{
86f55936 2139 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2140}
2141
2142int
864dbfa3 2143Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2144{
96a5add6 2145 PERL_UNUSED_CONTEXT;
565764a8 2146 mg->mg_len = -1;
c6496cc7 2147 SvSCREAM_off(sv);
93a17b20
LW
2148 return 0;
2149}
2150
2151int
864dbfa3 2152Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2153{
8772537c 2154 PERL_UNUSED_ARG(mg);
14befaf4 2155 sv_unmagic(sv, PERL_MAGIC_bm);
b84d1fce 2156 SvTAIL_off(sv);
79072805
LW
2157 SvVALID_off(sv);
2158 return 0;
2159}
2160
2161int
864dbfa3 2162Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2163{
8772537c 2164 PERL_UNUSED_ARG(mg);
14befaf4 2165 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2166 SvCOMPILED_off(sv);
2167 return 0;
2168}
2169
2170int
864dbfa3 2171Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2172{
35a4481c 2173 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2174
2175 if (uf && uf->uf_set)
24f81a43 2176 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2177 return 0;
2178}
2179
c277df42 2180int
faf82a0b
AE
2181Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2182{
8772537c 2183 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2184 sv_unmagic(sv, PERL_MAGIC_qr);
2185 return 0;
2186}
2187
2188int
864dbfa3 2189Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2190{
97aff369 2191 dVAR;
8772537c
AL
2192 regexp * const re = (regexp *)mg->mg_obj;
2193 PERL_UNUSED_ARG(sv);
2194
c277df42
IZ
2195 ReREFCNT_dec(re);
2196 return 0;
2197}
2198
7a4c00b4 2199#ifdef USE_LOCALE_COLLATE
79072805 2200int
864dbfa3 2201Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2202{
2203 /*
838b5b74 2204 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2205 * and vanished with a faint plop.
2206 */
96a5add6 2207 PERL_UNUSED_CONTEXT;
8772537c 2208 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2209 if (mg->mg_ptr) {
2210 Safefree(mg->mg_ptr);
2211 mg->mg_ptr = NULL;
565764a8 2212 mg->mg_len = -1;
7a4c00b4 2213 }
bbce6d69
PP
2214 return 0;
2215}
7a4c00b4 2216#endif /* USE_LOCALE_COLLATE */
bbce6d69 2217
7e8c5dac
HS
2218/* Just clear the UTF-8 cache data. */
2219int
2220Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2221{
96a5add6 2222 PERL_UNUSED_CONTEXT;
8772537c 2223 PERL_UNUSED_ARG(sv);
7e8c5dac 2224 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2225 mg->mg_ptr = NULL;
7e8c5dac
HS
2226 mg->mg_len = -1; /* The mg_len holds the len cache. */
2227 return 0;
2228}
2229
bbce6d69 2230int
864dbfa3 2231Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2232{
97aff369 2233 dVAR;
e1ec3a88 2234 register const char *s;
2fdbfb4d
AB
2235 register I32 paren;
2236 register const REGEXP * rx;
2237 const char * const remaining = mg->mg_ptr + 1;
79072805 2238 I32 i;
8990e307 2239 STRLEN len;
2fdbfb4d 2240
79072805 2241 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2242 case '\015': /* $^MATCH */
2243 if (strEQ(remaining, "ATCH"))
2244 goto do_match;
2245 case '`': /* ${^PREMATCH} caught below */
2246 do_prematch:
f1b875a0 2247 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2248 goto setparen;
2249 case '\'': /* ${^POSTMATCH} caught below */
2250 do_postmatch:
f1b875a0 2251 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2252 goto setparen;
2253 case '&':
2254 do_match:
f1b875a0 2255 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2256 goto setparen;
2257 case '1': case '2': case '3': case '4':
2258 case '5': case '6': case '7': case '8': case '9':
104a8018 2259 paren = atoi(mg->mg_ptr);
2fdbfb4d 2260 setparen:
1e05feb3 2261 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
2262 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2263 break;
1e05feb3 2264 } else {
2fdbfb4d
AB
2265 /* Croak with a READONLY error when a numbered match var is
2266 * set without a previous pattern match. Unless it's C<local $1>
2267 */
2268 if (!PL_localizing) {
2269 Perl_croak(aTHX_ PL_no_modify);
2270 }
2271 }
748a9306 2272 case '\001': /* ^A */
3280af22 2273 sv_setsv(PL_bodytarget, sv);
748a9306 2274 break;
49460fe6 2275 case '\003': /* ^C */
38ab35f8 2276 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2277 break;
2278
79072805 2279 case '\004': /* ^D */
b4ab917c 2280#ifdef DEBUGGING
b83604b4 2281 s = SvPV_nolen_const(sv);
ddcf8bc1 2282 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2283 DEBUG_x(dump_all());
b4ab917c 2284#else
38ab35f8 2285 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2286#endif
79072805 2287 break;
28f23441 2288 case '\005': /* ^E */
d0063567 2289 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2290#ifdef MACOS_TRADITIONAL
38ab35f8 2291 gMacPerl_OSErr = SvIV(sv);
28f23441 2292#else
cd39f2b6 2293# ifdef VMS
38ab35f8 2294 set_vaxc_errno(SvIV(sv));
048c1ddf 2295# else
cd39f2b6 2296# ifdef WIN32
d0063567 2297 SetLastError( SvIV(sv) );
cd39f2b6 2298# else
9fed8b87 2299# ifdef OS2
38ab35f8 2300 os2_setsyserrno(SvIV(sv));
9fed8b87 2301# else
d0063567 2302 /* will anyone ever use this? */
38ab35f8 2303 SETERRNO(SvIV(sv), 4);
cd39f2b6 2304# endif
048c1ddf
IZ
2305# endif
2306# endif
22fae026 2307#endif
d0063567
DK
2308 }
2309 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2310 if (PL_encoding)
2311 SvREFCNT_dec(PL_encoding);
2312 if (SvOK(sv) || SvGMAGICAL(sv)) {
2313 PL_encoding = newSVsv(sv);
2314 }
2315 else {
a0714e2c 2316 PL_encoding = NULL;
d0063567
DK
2317 }
2318 }
2319 break;
79072805 2320 case '\006': /* ^F */
38ab35f8 2321 PL_maxsysfd = SvIV(sv);
79072805 2322 break;
a0d0e21e 2323 case '\010': /* ^H */
38ab35f8 2324 PL_hints = SvIV(sv);
a0d0e21e 2325 break;
9d116dd7 2326 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2327 Safefree(PL_inplace);
bd61b366 2328 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2329 break;
28f23441 2330 case '\017': /* ^O */
ac27b0f5 2331 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2332 Safefree(PL_osname);
bd61b366 2333 PL_osname = NULL;
3511154c
DM
2334 if (SvOK(sv)) {
2335 TAINT_PROPER("assigning to $^O");
2e0de35c 2336 PL_osname = savesvpv(sv);
3511154c 2337 }
ac27b0f5
NIS
2338 }
2339 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2340 STRLEN len;
2341 const char *const start = SvPV(sv, len);
b54fc2b6 2342 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2343 SV *tmp;
2344 struct refcounted_he *tmp_he;
2345
2346
2347 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2348 PL_hints
2349 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2350
2351 /* Opening for input is more common than opening for output, so
2352 ensure that hints for input are sooner on linked list. */
2353 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2354 : newSVpvs(""));
2355 SvFLAGS(tmp) |= SvUTF8(sv);
2356
2357 tmp_he
2358 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2359 sv_2mortal(newSVpvs("open>")), tmp);
2360
2361 /* The UTF-8 setting is carried over */
2362 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2363
11bcd5da 2364 PL_compiling.cop_hints_hash
8b850bd5
NC
2365 = Perl_refcounted_he_new(aTHX_ tmp_he,
2366 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2367 }
28f23441 2368 break;
79072805 2369 case '\020': /* ^P */
2fdbfb4d
AB
2370 if (*remaining == '\0') { /* ^P */
2371 PL_perldb = SvIV(sv);
2372 if (PL_perldb && !PL_DBsingle)
2373 init_debugger();
2374 break;
2375 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2376 goto do_prematch;
2377 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2378 goto do_postmatch;
2379 }
79072805 2380 case '\024': /* ^T */
88e89b8a 2381#ifdef BIG_TIME
6b88bc9c 2382 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2383#else
38ab35f8 2384 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2385#endif
79072805 2386 break;
e07ea26a
NC
2387 case '\025': /* ^UTF8CACHE */
2388 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2389 PL_utf8cache = (signed char) sv_2iv(sv);
2390 }
2391 break;
fde18df1 2392 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2393 if (*(mg->mg_ptr+1) == '\0') {
2394 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2395 i = SvIV(sv);
ac27b0f5 2396 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2397 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2398 }
599cee73 2399 }
0a378802 2400 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2401 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2402 if (!SvPOK(sv) && PL_localizing) {
2403 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2404 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2405 break;
2406 }
f4fc7782 2407 {
b5477537 2408 STRLEN len, i;
d3a7d8c7 2409 int accumulate = 0 ;
f4fc7782 2410 int any_fatals = 0 ;
b83604b4 2411 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2412 for (i = 0 ; i < len ; ++i) {
2413 accumulate |= ptr[i] ;
2414 any_fatals |= (ptr[i] & 0xAA) ;
2415 }
4243c432
NC
2416 if (!accumulate) {
2417 if (!specialWARN(PL_compiling.cop_warnings))
2418 PerlMemShared_free(PL_compiling.cop_warnings);
2419 PL_compiling.cop_warnings = pWARN_NONE;
2420 }
72dc9ed5
NC
2421 /* Yuck. I can't see how to abstract this: */
2422 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2423 WARN_ALL) && !any_fatals) {
4243c432
NC
2424 if (!specialWARN(PL_compiling.cop_warnings))
2425 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2426 PL_compiling.cop_warnings = pWARN_ALL;
2427 PL_dowarn |= G_WARN_ONCE ;
727405f8 2428 }
d3a7d8c7 2429 else {
72dc9ed5
NC
2430 STRLEN len;
2431 const char *const p = SvPV_const(sv, len);
2432
2433 PL_compiling.cop_warnings
8ee4cf24 2434 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2435 p, len);
2436
d3a7d8c7
GS
2437 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2438 PL_dowarn |= G_WARN_ONCE ;
2439 }
f4fc7782 2440
d3a7d8c7 2441 }
4438c4b7 2442 }
971a9dd3 2443 }
79072805
LW
2444 break;
2445 case '.':
3280af22
NIS
2446 if (PL_localizing) {
2447 if (PL_localizing == 1)
7766f137 2448 SAVESPTR(PL_last_in_gv);
748a9306 2449 }
3280af22 2450 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2451 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2452 break;
2453 case '^':
3280af22 2454 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2455 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2456 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2457 break;
2458 case '~':
3280af22 2459 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2460 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2461 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2462 break;
2463 case '=':
38ab35f8 2464 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2465 break;
2466 case '-':
38ab35f8 2467 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2468 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2469 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2470 break;
2471 case '%':
38ab35f8 2472 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2473 break;
2474 case '|':
4b65379b 2475 {
8772537c 2476 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2477 if(!io)
2478 break;
38ab35f8 2479 if ((SvIV(sv)) == 0)
4b65379b
CS
2480 IoFLAGS(io) &= ~IOf_FLUSH;
2481 else {
2482 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2483 PerlIO *ofp = IoOFP(io);
2484 if (ofp)
2485 (void)PerlIO_flush(ofp);
2486 IoFLAGS(io) |= IOf_FLUSH;
2487 }
2488 }
79072805
LW
2489 }
2490 break;
79072805 2491 case '/':
3280af22 2492 SvREFCNT_dec(PL_rs);
8bfdd7d9 2493 PL_rs = newSVsv(sv);
79072805
LW
2494 break;
2495 case '\\':
7889fe52
NIS
2496 if (PL_ors_sv)
2497 SvREFCNT_dec(PL_ors_sv);
009c130f 2498 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2499 PL_ors_sv = newSVsv(sv);
009c130f 2500 }
e3c19b7b 2501 else {
a0714e2c 2502 PL_ors_sv = NULL;
e3c19b7b 2503 }
79072805
LW
2504 break;
2505 case ',':
7889fe52
NIS
2506 if (PL_ofs_sv)
2507 SvREFCNT_dec(PL_ofs_sv);
2508 if (SvOK(sv) || SvGMAGICAL(sv)) {
2509 PL_ofs_sv = newSVsv(sv);
2510 }
2511 else {
a0714e2c 2512 PL_ofs_sv = NULL;
7889fe52 2513 }
79072805 2514 break;
79072805 2515 case '[':
38ab35f8 2516 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2517 break;
2518 case '?':
ff0cee69 2519#ifdef COMPLEX_STATUS
6b88bc9c
GS
2520 if (PL_localizing == 2) {
2521 PL_statusvalue = LvTARGOFF(sv);
2522 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2523 }
2524 else
2525#endif
2526#ifdef VMSISH_STATUS
2527 if (VMSISH_STATUS)
fb38d079 2528 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2529 else
2530#endif
38ab35f8 2531 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2532 break;
2533 case '!':
93189314
JH
2534 {
2535#ifdef VMS
2536# define PERL_VMS_BANG vaxc$errno
2537#else
2538# define PERL_VMS_BANG 0
2539#endif
91487cfc 2540 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2541 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2542 }
79072805
LW
2543 break;
2544 case '<':
38ab35f8 2545 PL_uid = SvIV(sv);
3280af22
NIS
2546 if (PL_delaymagic) {
2547 PL_delaymagic |= DM_RUID;
79072805
LW
2548 break; /* don't do magic till later */
2549 }
2550#ifdef HAS_SETRUID
b28d0864 2551 (void)setruid((Uid_t)PL_uid);
79072805
LW
2552#else
2553#ifdef HAS_SETREUID
3280af22 2554 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2555#else
85e6fe83 2556#ifdef HAS_SETRESUID
b28d0864 2557 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2558#else
75870ed3 2559 if (PL_uid == PL_euid) { /* special case $< = $> */
2560#ifdef PERL_DARWIN
2561 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2562 if (PL_uid != 0 && PerlProc_getuid() == 0)
2563 (void)PerlProc_setuid(0);
2564#endif
b28d0864 2565 (void)PerlProc_setuid(PL_uid);
75870ed3 2566 } else {
d8eceb89 2567 PL_uid = PerlProc_getuid();
cea2e8a9 2568 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2569 }
79072805
LW
2570#endif
2571#endif
85e6fe83 2572#endif
d8eceb89 2573 PL_uid = PerlProc_getuid();
3280af22 2574 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2575 break;
2576 case '>':
38ab35f8 2577 PL_euid = SvIV(sv);
3280af22
NIS
2578 if (PL_delaymagic) {
2579 PL_delaymagic |= DM_EUID;
79072805
LW
2580 break; /* don't do magic till later */
2581 }
2582#ifdef HAS_SETEUID
3280af22 2583 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2584#else
2585#ifdef HAS_SETREUID
b28d0864 2586 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2587#else
2588#ifdef HAS_SETRESUID
6b88bc9c 2589 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2590#else
b28d0864
NIS
2591 if (PL_euid == PL_uid) /* special case $> = $< */
2592 PerlProc_setuid(PL_euid);
a0d0e21e 2593 else {
e8ee3774 2594 PL_euid = PerlProc_geteuid();
cea2e8a9 2595 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2596 }
79072805
LW
2597#endif
2598#endif
85e6fe83 2599#endif
d8eceb89 2600 PL_euid = PerlProc_geteuid();
3280af22 2601 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2602 break;
2603 case '(':
38ab35f8 2604 PL_gid = SvIV(sv);
3280af22
NIS
2605 if (PL_delaymagic) {
2606 PL_delaymagic |= DM_RGID;
79072805
LW
2607 break; /* don't do magic till later */
2608 }
2609#ifdef HAS_SETRGID
b28d0864 2610 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2611#else
2612#ifdef HAS_SETREGID
3280af22 2613 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2614#else
2615#ifdef HAS_SETRESGID
b28d0864 2616 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2617#else
b28d0864
NIS
2618 if (PL_gid == PL_egid) /* special case $( = $) */
2619 (void)PerlProc_setgid(PL_gid);
748a9306 2620 else {
d8eceb89 2621 PL_gid = PerlProc_getgid();
cea2e8a9 2622 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2623 }
79072805
LW
2624#endif
2625#endif
85e6fe83 2626#endif
d8eceb89 2627 PL_gid = PerlProc_getgid();
3280af22 2628 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2629 break;
2630 case ')':
5cd24f17
PP
2631#ifdef HAS_SETGROUPS
2632 {
b83604b4 2633 const char *p = SvPV_const(sv, len);
757f63d8
SP
2634 Groups_t *gary = NULL;
2635
2636 while (isSPACE(*p))
2637 ++p;
2638 PL_egid = Atol(p);
2639 for (i = 0; i < NGROUPS; ++i) {
2640 while (*p && !isSPACE(*p))
2641 ++p;
2642 while (isSPACE(*p))
2643 ++p;
2644 if (!*p)
2645 break;
2646 if(!gary)
2647 Newx(gary, i + 1, Groups_t);
2648 else
2649 Renew(gary, i + 1, Groups_t);
2650 gary[i] = Atol(p);
2651 }
2652 if (i)
2653 (void)setgroups(i, gary);
f5a63d97 2654 Safefree(gary);
5cd24f17
PP
2655 }
2656#else /* HAS_SETGROUPS */
38ab35f8 2657 PL_egid = SvIV(sv);
5cd24f17 2658#endif /* HAS_SETGROUPS */
3280af22
NIS
2659 if (PL_delaymagic) {
2660 PL_delaymagic |= DM_EGID;
79072805
LW
2661 break; /* don't do magic till later */
2662 }
2663#ifdef HAS_SETEGID
3280af22 2664 (void)setegid((Gid_t)PL_egid);
79072805
LW
2665#else
2666#ifdef HAS_SETREGID
b28d0864 2667 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2668#else
2669#ifdef HAS_SETRESGID
b28d0864 2670 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2671#else
b28d0864
NIS
2672 if (PL_egid == PL_gid) /* special case $) = $( */
2673 (void)PerlProc_setgid(PL_egid);
748a9306 2674 else {
d8eceb89 2675 PL_egid = PerlProc_getegid();
cea2e8a9 2676 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2677 }
79072805
LW
2678#endif
2679#endif
85e6fe83 2680#endif
d8eceb89 2681 PL_egid = PerlProc_getegid();
3280af22 2682 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2683 break;
2684 case ':':
2d8e6c8d 2685 PL_chopset = SvPV_force(sv,len);
79072805 2686 break;
cd39f2b6 2687#ifndef MACOS_TRADITIONAL
79072805 2688 case '0':
e2975953 2689 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2690#ifdef HAS_SETPROCTITLE
2691 /* The BSDs don't show the argv[] in ps(1) output, they
2692 * show a string from the process struct and provide
2693 * the setproctitle() routine to manipulate that. */
a2722ac9 2694 if (PL_origalen != 1) {
b83604b4 2695 s = SvPV_const(sv, len);
98b76f99 2696# if __FreeBSD_version > 410001
9aad2c0e 2697 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2698 * but not the "(perl) suffix from the ps(1)
2699 * output, because that's what ps(1) shows if the
2700 * argv[] is modified. */
6f2ad931 2701 setproctitle("-%s", s);
9aad2c0e 2702# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2703 /* This doesn't really work if you assume that
2704 * $0 = 'foobar'; will wipe out 'perl' from the $0
2705 * because in ps(1) output the result will be like
2706 * sprintf("perl: %s (perl)", s)
2707 * I guess this is a security feature:
2708 * one (a user process) cannot get rid of the original name.
2709 * --jhi */
2710 setproctitle("%s", s);
2711# endif
2712 }
9d3968b2 2713#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2714 if (PL_origalen != 1) {
17aa7f3d 2715 union pstun un;
b83604b4 2716 s = SvPV_const(sv, len);
6867be6d 2717 un.pst_command = (char *)s;
17aa7f3d
JH
2718 pstat(PSTAT_SETCMD, un, len, 0, 0);
2719 }
9d3968b2 2720#else
2d2af554
GA
2721 if (PL_origalen > 1) {
2722 /* PL_origalen is set in perl_parse(). */
2723 s = SvPV_force(sv,len);
2724 if (len >= (STRLEN)PL_origalen-1) {
2725 /* Longer than original, will be truncated. We assume that
2726 * PL_origalen bytes are available. */
2727 Copy(s, PL_origargv[0], PL_origalen-1, char);
2728 }
2729 else {
2730 /* Shorter than original, will be padded. */
235ac35d 2731#ifdef PERL_DARWIN
60777a0d
JH
2732 /* Special case for Mac OS X: see [perl #38868] */
2733 const int pad = 0;
235ac35d 2734#else
8a89a4f1
MB
2735 /* Is the space counterintuitive? Yes.
2736 * (You were expecting \0?)
2737 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2738 * --jhi */
60777a0d 2739 const int pad = ' ';
235ac35d 2740#endif
60777a0d
JH
2741 Copy(s, PL_origargv[0], len, char);
2742 PL_origargv[0][len] = 0;
2743 memset(PL_origargv[0] + len + 1,
2744 pad, PL_origalen - len - 1);
2d2af554
GA
2745 }
2746 PL_origargv[0][PL_origalen-1] = 0;
2747 for (i = 1; i < PL_origargc; i++)
2748 PL_origargv[i] = 0;
79072805 2749 }
9d3968b2 2750#endif
e2975953 2751 UNLOCK_DOLLARZERO_MUTEX;
79072805 2752 break;
cd39f2b6 2753#endif
79072805
LW
2754 }
2755 return 0;
2756}
2757
2758I32
35a4481c 2759Perl_whichsig(pTHX_ const char *sig)
79072805 2760{
aadb217d 2761 register char* const* sigv;
96a5add6 2762 PERL_UNUSED_CONTEXT;
79072805 2763
aadb217d 2764 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2765 if (strEQ(sig,*sigv))
aadb217d 2766 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2767#ifdef SIGCLD
2768 if (strEQ(sig,"CHLD"))
2769 return SIGCLD;
2770#endif
2771#ifdef SIGCHLD
2772 if (strEQ(sig,"CLD"))
2773 return SIGCHLD;
2774#endif
7f1236c0 2775 return -1;
79072805
LW
2776}
2777
ecfc5424 2778Signal_t
1e82f5a6 2779#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2780Perl_sighandler(int sig, ...)
1e82f5a6
SH
2781#else
2782Perl_sighandler(int sig)
2783#endif
79072805 2784{
1018e26f
NIS
2785#ifdef PERL_GET_SIG_CONTEXT
2786 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2787#else
cea2e8a9 2788 dTHX;
71d280e3 2789#endif
79072805 2790 dSP;
a0714e2c
SS
2791 GV *gv = NULL;
2792 SV *sv = NULL;
8772537c 2793 SV * const tSv = PL_Sv;
601f1833 2794 CV *cv = NULL;
533c011a 2795 OP *myop = PL_op;
84902520 2796 U32 flags = 0;
8772537c 2797 XPV * const tXpv = PL_Xpv;
71d280e3 2798
3280af22 2799 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2800 flags |= 1;
3280af22 2801 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2802 flags |= 4;
3280af22 2803 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2804 flags |= 16;
2805
727405f8 2806 if (!PL_psig_ptr[sig]) {
99ef548b 2807 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2808 PL_sig_name[sig]);
2809 exit(sig);
2810 }
ff0cee69 2811
84902520
TB
2812 /* Max number of items pushed there is 3*n or 4. We cannot fix
2813 infinity, so we fix 4 (in fact 5): */
2814 if (flags & 1) {
3280af22 2815 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2816 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2817 }
ac27b0f5 2818 if (flags & 4)
3280af22 2819 PL_markstack_ptr++; /* Protect mark. */
84902520 2820 if (flags & 16)
3280af22 2821 PL_scopestack_ix += 1;
84902520 2822 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2823 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2824 || SvTYPE(cv) != SVt_PVCV) {
2825 HV *st;
f2c0649b 2826 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2827 }
84902520 2828
a0d0e21e 2829 if (!cv || !CvROOT(cv)) {
599cee73 2830 if (ckWARN(WARN_SIGNAL))
9014280d 2831 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2832 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2833 : ((cv && CvGV(cv))
2834 ? GvENAME(CvGV(cv))
2835 : "__ANON__")));
2836 goto cleanup;
79072805
LW
2837 }
2838
22c35a8c 2839 if(PL_psig_name[sig]) {
b37c2d43 2840 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2841 flags |= 64;
df3728a2 2842#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2843 PL_sig_sv = sv;
df3728a2 2844#endif
84902520 2845 } else {
ff0cee69 2846 sv = sv_newmortal();
22c35a8c 2847 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2848 }
e336de0d 2849
e788e7d3 2850 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2851 PUSHMARK(SP);
79072805 2852 PUSHs(sv);
8aad04aa
JH
2853#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2854 {
2855 struct sigaction oact;
2856
2857 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2858 siginfo_t *sip;
2859 va_list args;
2860
2861 va_start(args, sig);
2862 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2863 if (sip) {
2864 HV *sih = newHV();
2865 SV *rv = newRV_noinc((SV*)sih);
2866 /* The siginfo fields signo, code, errno, pid, uid,
2867 * addr, status, and band are defined by POSIX/SUSv3. */
2868 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2869 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2870#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 2871 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2872 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2873 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2874 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2875 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2876 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2877#endif
8aad04aa
JH
2878 EXTEND(SP, 2);
2879 PUSHs((SV*)rv);
10edeb5d 2880 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2881 }
b4552a27 2882
31427afe 2883 va_end(args);
8aad04aa
JH
2884 }
2885 }
2886#endif
79072805 2887 PUTBACK;
a0d0e21e 2888
1b266415 2889 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2890
d3acc0f7 2891 POPSTACK;
1b266415 2892 if (SvTRUE(ERRSV)) {
1d615522 2893#ifndef PERL_MICRO
983dbef6 2894#ifdef HAS_SIGPROCMASK
1b266415
NIS
2895 /* Handler "died", for example to get out of a restart-able read().
2896 * Before we re-do that on its behalf re-enable the signal which was
2897 * blocked by the system when we entered.
2898 */
2899 sigset_t set;
2900 sigemptyset(&set);
2901 sigaddset(&set,sig);
2902 sigprocmask(SIG_UNBLOCK, &set, NULL);
2903#else
2904 /* Not clear if this will work */
2905 (void)rsignal(sig, SIG_IGN);
5c1546dc 2906 (void)rsignal(sig, PL_csighandlerp);
1b266415 2907#endif
1d615522 2908#endif /* !PERL_MICRO */
bd61b366 2909 Perl_die(aTHX_ NULL);
1b266415 2910 }
00d579c5 2911cleanup:
84902520 2912 if (flags & 1)
3280af22 2913 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2914 if (flags & 4)
3280af22 2915 PL_markstack_ptr--;
84902520 2916 if (flags & 16)
3280af22 2917 PL_scopestack_ix -= 1;
84902520
TB
2918 if (flags & 64)
2919 SvREFCNT_dec(sv);
533c011a 2920 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2921
3280af22
NIS
2922 PL_Sv = tSv; /* Restore global temporaries. */
2923 PL_Xpv = tXpv;
53bb94e2 2924 return;
79072805 2925}
4e35701f
NIS
2926
2927
51371543 2928static void
8772537c 2929S_restore_magic(pTHX_ const void *p)
51371543 2930{
97aff369 2931 dVAR;
8772537c
AL
2932 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2933 SV* const sv = mgs->mgs_sv;
51371543
GS
2934
2935 if (!sv)
2936 return;
2937
2938 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2939 {
f8c7b90f 2940#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2941 /* While magic was saved (and off) sv_setsv may well have seen
2942 this SV as a prime candidate for COW. */
2943 if (SvIsCOW(sv))
e424a81e 2944 sv_force_normal_flags(sv, 0);
f9701176
NC
2945#endif
2946
51371543
GS
2947 if (mgs->mgs_flags)
2948 SvFLAGS(sv) |= mgs->mgs_flags;
2949 else
2950 mg_magical(sv);
2b77b520
YST
2951 if (SvGMAGICAL(sv)) {
2952 /* downgrade public flags to private,
2953 and discard any other private flags */
2954
10edeb5d
JH
2955 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2956 if (pubflags) {
2957 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2958 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2959 }
2960 }
51371543
GS
2961 }
2962
2963 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2964
2965 /* If we're still on top of the stack, pop us off. (That condition
2966 * will be satisfied if restore_magic was called explicitly, but *not*
2967 * if it's being called via leave_scope.)
2968 * The reason for doing this is that otherwise, things like sv_2cv()
2969 * may leave alloc gunk on the savestack, and some code
2970 * (e.g. sighandler) doesn't expect that...
2971 */
2972 if (PL_savestack_ix == mgs->mgs_ss_ix)
2973 {
2974 I32 popval = SSPOPINT;
c76ac1ee 2975 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2976 PL_savestack_ix -= 2;
2977 popval = SSPOPINT;
2978 assert(popval == SAVEt_ALLOC);
2979 popval = SSPOPINT;
2980 PL_savestack_ix -= popval;
2981 }
2982
2983}
2984
2985static void
8772537c 2986S_unwind_handler_stack(pTHX_ const void *p)
51371543 2987{
27da23d5 2988 dVAR;
e1ec3a88 2989 const U32 flags = *(const U32*)p;
51371543
GS
2990
2991 if (flags & 1)
2992 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2993#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2994 if (flags & 64)
27da23d5 2995 SvREFCNT_dec(PL_sig_sv);
df3728a2 2996#endif
51371543 2997}
1018e26f 2998
66610fdd 2999/*
b3ca2e83
NC
3000=for apidoc magic_sethint
3001
3002Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3003C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3004anything that would need a deep copy. Maybe we should warn if we find a
3005reference.
b3ca2e83
NC
3006
3007=cut
3008*/
3009int
3010Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3011{
3012 dVAR;
3013 assert(mg->mg_len == HEf_SVKEY);
3014
e6e3e454
NC
3015 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3016 an alternative leaf in there, with PL_compiling.cop_hints being used if
3017 it's NULL. If needed for threads, the alternative could lock a mutex,
3018 or take other more complex action. */
3019
5b9c0671
NC
3020 /* Something changed in %^H, so it will need to be restored on scope exit.
3021 Doing this here saves a lot of doing it manually in perl code (and
3022 forgetting to do it, and consequent subtle errors. */
3023 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3024 PL_compiling.cop_hints_hash
3025 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 3026 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
3027 return 0;
3028}
3029
3030/*
3031=for apidoc magic_sethint
3032
c28fe1ec
NC
3033Triggered by a delete from %^H, records the key to
3034C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3035
3036=cut
3037*/
3038int
3039Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3040{
3041 dVAR;
f5a63d97
AL
3042 PERL_UNUSED_ARG(sv);
3043
b3ca2e83
NC
3044 assert(mg->mg_len == HEf_SVKEY);
3045
b3f24c00
MHM
3046 PERL_UNUSED_ARG(sv);
3047
5b9c0671 3048 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3049 PL_compiling.cop_hints_hash
3050 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3051 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3052 return 0;
3053}
3054
3055/*
66610fdd
RGS
3056 * Local variables:
3057 * c-indentation-style: bsd
3058 * c-basic-offset: 4
3059 * indent-tabs-mode: t
3060 * End:
3061 *
37442d52
RGS
3062 * ex: set ts=8 sts=4 sw=4 noet:
3063 */