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Fix Win32 breakage caused by #31926
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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
89c14e2e
BB
1531 /* Skip _isaelem because _isa will handle it shortly */
1532 if (PL_delaymagic & DM_ARRAY && mg->mg_type == PERL_MAGIC_isaelem)
1533 return 0;
1534
70cd14a1
CB
1535 /* XXX Once it's possible, we need to
1536 detect that our @ISA is aliased in
1537 other stashes, and act on the stashes
1538 of all of the aliases */
1539
e1a479c5
BB
1540 /* The first case occurs via setisa,
1541 the second via setisa_elem, which
1542 calls this same magic */
08aeb9f7
BB
1543 stash = GvSTASH(
1544 SvTYPE(mg->mg_obj) == SVt_PVGV
1545 ? (GV*)mg->mg_obj
1546 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
e1a479c5
BB
1547 );
1548
89c14e2e 1549 mro_isa_changed_in(stash);
08aeb9f7 1550
463ee0b2
LW
1551 return 0;
1552}
1553
1554int
864dbfa3 1555Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1556{
97aff369 1557 dVAR;
8772537c
AL
1558 PERL_UNUSED_ARG(sv);
1559 PERL_UNUSED_ARG(mg);
3280af22 1560 PL_amagic_generation++;
463ee0b2 1561
a0d0e21e
LW
1562 return 0;
1563}
463ee0b2 1564
946ec16e 1565int
864dbfa3 1566Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1567{
dd374669 1568 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1569 I32 i = 0;
8772537c 1570 PERL_UNUSED_ARG(mg);
7719e241 1571
6ff81951 1572 if (hv) {
497b47a8
JH
1573 (void) hv_iterinit(hv);
1574 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1575 i = HvKEYS(hv);
1576 else {
1577 while (hv_iternext(hv))
1578 i++;
1579 }
6ff81951
GS
1580 }
1581
1582 sv_setiv(sv, (IV)i);
1583 return 0;
1584}
1585
1586int
864dbfa3 1587Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1588{
8772537c 1589 PERL_UNUSED_ARG(mg);
946ec16e
PP
1590 if (LvTARG(sv)) {
1591 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1592 }
1593 return 0;
ac27b0f5 1594}
946ec16e 1595
e336de0d 1596/* caller is responsible for stack switching/cleanup */
565764a8 1597STATIC int
e1ec3a88 1598S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1599{
97aff369 1600 dVAR;
a0d0e21e 1601 dSP;
463ee0b2 1602
924508f0
GS
1603 PUSHMARK(SP);
1604 EXTEND(SP, n);
33c27489 1605 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1606 if (n > 1) {
93965878 1607 if (mg->mg_ptr) {
565764a8 1608 if (mg->mg_len >= 0)
79cb57f6 1609 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1610 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1611 PUSHs((SV*)mg->mg_ptr);
1612 }
14befaf4 1613 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1614 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1615 }
1616 }
1617 if (n > 2) {
1618 PUSHs(val);
88e89b8a 1619 }
463ee0b2
LW
1620 PUTBACK;
1621
864dbfa3 1622 return call_method(meth, flags);
946ec16e
PP
1623}
1624
76e3520e 1625STATIC int
e1ec3a88 1626S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1627{
27da23d5 1628 dVAR; dSP;
463ee0b2 1629
a0d0e21e
LW
1630 ENTER;
1631 SAVETMPS;
e788e7d3 1632 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1633
33c27489 1634 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1635 sv_setsv(sv, *PL_stack_sp--);
93965878 1636 }
463ee0b2 1637
d3acc0f7 1638 POPSTACK;
a0d0e21e
LW
1639 FREETMPS;
1640 LEAVE;
1641 return 0;
1642}
463ee0b2 1643
a0d0e21e 1644int
864dbfa3 1645Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1646{
a0d0e21e
LW
1647 if (mg->mg_ptr)
1648 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1649 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1650 return 0;
1651}
1652
1653int
864dbfa3 1654Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1655{
27da23d5 1656 dVAR; dSP;
a60c0954 1657 ENTER;
e788e7d3 1658 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1659 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1660 POPSTACK;
a60c0954 1661 LEAVE;
463ee0b2
LW
1662 return 0;
1663}
1664
1665int
864dbfa3 1666Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1667{
a0d0e21e
LW
1668 return magic_methpack(sv,mg,"DELETE");
1669}
463ee0b2 1670
93965878
NIS
1671
1672U32
864dbfa3 1673Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1674{
27da23d5 1675 dVAR; dSP;
22846ab4 1676 I32 retval = 0;
93965878
NIS
1677
1678 ENTER;
1679 SAVETMPS;
e788e7d3 1680 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1681 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1682 sv = *PL_stack_sp--;
22846ab4
AB
1683 retval = SvIV(sv)-1;
1684 if (retval < -1)
1685 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1686 }
d3acc0f7 1687 POPSTACK;
93965878
NIS
1688 FREETMPS;
1689 LEAVE;
22846ab4 1690 return (U32) retval;
93965878
NIS
1691}
1692
cea2e8a9
GS
1693int
1694Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1695{
27da23d5 1696 dVAR; dSP;
463ee0b2 1697
e336de0d 1698 ENTER;
e788e7d3 1699 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1700 PUSHMARK(SP);
33c27489 1701 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1702 PUTBACK;
864dbfa3 1703 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1704 POPSTACK;
a60c0954 1705 LEAVE;
a3bcc51e 1706
463ee0b2
LW
1707 return 0;
1708}
1709
1710int
864dbfa3 1711Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1712{
27da23d5 1713 dVAR; dSP;
666ea192 1714 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1715
1716 ENTER;
a0d0e21e 1717 SAVETMPS;
e788e7d3 1718 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1719 PUSHMARK(SP);
1720 EXTEND(SP, 2);
33c27489 1721 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1722 if (SvOK(key))
1723 PUSHs(key);
1724 PUTBACK;
1725
864dbfa3 1726 if (call_method(meth, G_SCALAR))
3280af22 1727 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1728
d3acc0f7 1729 POPSTACK;
a0d0e21e
LW
1730 FREETMPS;
1731 LEAVE;
79072805
LW
1732 return 0;
1733}
1734
1735int
1146e912 1736Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1737{
1738 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1739}
a0d0e21e 1740
a3bcc51e
TP
1741SV *
1742Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1743{
27da23d5 1744 dVAR; dSP;
5fcbf73d 1745 SV *retval;
8772537c
AL
1746 SV * const tied = SvTIED_obj((SV*)hv, mg);
1747 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1748
1749 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1750 SV *key;
bfcb3514 1751 if (HvEITER_get(hv))
a3bcc51e
TP
1752 /* we are in an iteration so the hash cannot be empty */
1753 return &PL_sv_yes;
1754 /* no xhv_eiter so now use FIRSTKEY */
1755 key = sv_newmortal();
1756 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1757 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1758 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1759 }
1760
1761 /* there is a SCALAR method that we can call */
1762 ENTER;
1763 PUSHSTACKi(PERLSI_MAGIC);
1764 PUSHMARK(SP);
1765 EXTEND(SP, 1);
1766 PUSHs(tied);
1767 PUTBACK;
1768
1769 if (call_method("SCALAR", G_SCALAR))
1770 retval = *PL_stack_sp--;
5fcbf73d
AL
1771 else
1772 retval = &PL_sv_undef;
a3bcc51e
TP
1773 POPSTACK;
1774 LEAVE;
1775 return retval;
1776}
1777
a0d0e21e 1778int
864dbfa3 1779Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1780{
97aff369 1781 dVAR;
8772537c
AL
1782 GV * const gv = PL_DBline;
1783 const I32 i = SvTRUE(sv);
1784 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1785 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1786 if (svp && SvIOKp(*svp)) {
1787 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1788 if (o) {
1789 /* set or clear breakpoint in the relevant control op */
1790 if (i)
1791 o->op_flags |= OPf_SPECIAL;
1792 else
1793 o->op_flags &= ~OPf_SPECIAL;
1794 }
5df8de69 1795 }
79072805
LW
1796 return 0;
1797}
1798
1799int
8772537c 1800Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1801{
97aff369 1802 dVAR;
8772537c 1803 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1804 if (obj) {
fc15ae8f 1805 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1806 } else {
1807 SvOK_off(sv);
1808 }
79072805
LW
1809 return 0;
1810}
1811
1812int
864dbfa3 1813Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1814{
97aff369 1815 dVAR;
8772537c 1816 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1817 if (obj) {
fc15ae8f 1818 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1819 } else {
1820 if (ckWARN(WARN_MISC))
1821 Perl_warner(aTHX_ packWARN(WARN_MISC),
1822 "Attempt to set length of freed array");
1823 }
1824 return 0;
1825}
1826
1827int
1828Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1829{
97aff369 1830 dVAR;
53c1dcc0 1831 PERL_UNUSED_ARG(sv);
94f3782b
DM
1832 /* during global destruction, mg_obj may already have been freed */
1833 if (PL_in_clean_all)
1ea47f64 1834 return 0;
94f3782b 1835
83bf042f
NC
1836 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1837
1838 if (mg) {
1839 /* arylen scalar holds a pointer back to the array, but doesn't own a
1840 reference. Hence the we (the array) are about to go away with it
1841 still pointing at us. Clear its pointer, else it would be pointing
1842 at free memory. See the comment in sv_magic about reference loops,
1843 and why it can't own a reference to us. */
1844 mg->mg_obj = 0;
1845 }
a0d0e21e
LW
1846 return 0;
1847}
1848
1849int
864dbfa3 1850Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1851{
97aff369 1852 dVAR;
8772537c 1853 SV* const lsv = LvTARG(sv);
3881461a 1854 PERL_UNUSED_ARG(mg);
ac27b0f5 1855
a0d0e21e 1856 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1857 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1858 if (found && found->mg_len >= 0) {
1859 I32 i = found->mg_len;
7e2040f0 1860 if (DO_UTF8(lsv))
a0ed51b3 1861 sv_pos_b2u(lsv, &i);
fc15ae8f 1862 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1863 return 0;
1864 }
1865 }
0c34ef67 1866 SvOK_off(sv);
a0d0e21e
LW
1867 return 0;
1868}
1869
1870int
864dbfa3 1871Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1872{
97aff369 1873 dVAR;
8772537c 1874 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1875 SSize_t pos;
1876 STRLEN len;
c00206c8 1877 STRLEN ulen = 0;
53d44271 1878 MAGIC* found;
a0d0e21e 1879
3881461a 1880 PERL_UNUSED_ARG(mg);
ac27b0f5 1881
a0d0e21e 1882 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1883 found = mg_find(lsv, PERL_MAGIC_regex_global);
1884 else
1885 found = NULL;
1886 if (!found) {
a0d0e21e
LW
1887 if (!SvOK(sv))
1888 return 0;
d83f0a82
NC
1889#ifdef PERL_OLD_COPY_ON_WRITE
1890 if (SvIsCOW(lsv))
1891 sv_force_normal_flags(lsv, 0);
1892#endif
3881461a 1893 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1894 NULL, 0);
a0d0e21e
LW
1895 }
1896 else if (!SvOK(sv)) {
3881461a 1897 found->mg_len = -1;
a0d0e21e
LW
1898 return 0;
1899 }
1900 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1901
fc15ae8f 1902 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1903
7e2040f0 1904 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1905 ulen = sv_len_utf8(lsv);
1906 if (ulen)
1907 len = ulen;
a0ed51b3
LW
1908 }
1909
a0d0e21e
LW
1910 if (pos < 0) {
1911 pos += len;
1912 if (pos < 0)
1913 pos = 0;
1914 }
eb160463 1915 else if (pos > (SSize_t)len)
a0d0e21e 1916 pos = len;
a0ed51b3
LW
1917
1918 if (ulen) {
1919 I32 p = pos;
1920 sv_pos_u2b(lsv, &p, 0);
1921 pos = p;
1922 }
727405f8 1923
3881461a
AL
1924 found->mg_len = pos;
1925 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1926
79072805
LW
1927 return 0;
1928}
1929
1930int
864dbfa3 1931Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1932{
79072805 1933 GV* gv;
8772537c
AL
1934 PERL_UNUSED_ARG(mg);
1935
dd69841b
BB
1936 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1937
79072805
LW
1938 if (!SvOK(sv))
1939 return 0;
2e5b91de 1940 if (isGV_with_GP(sv)) {
180488f8
NC
1941 /* We're actually already a typeglob, so don't need the stuff below.
1942 */
1943 return 0;
1944 }
f776e3cd 1945 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1946 if (sv == (SV*)gv)
1947 return 0;
1948 if (GvGP(sv))
88e89b8a 1949 gp_free((GV*)sv);
79072805 1950 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1951 return 0;
1952}
1953
1954int
864dbfa3 1955Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1956{
1957 STRLEN len;
35a4481c 1958 SV * const lsv = LvTARG(sv);
b83604b4 1959 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1960 I32 offs = LvTARGOFF(sv);
1961 I32 rem = LvTARGLEN(sv);
8772537c 1962 PERL_UNUSED_ARG(mg);
6ff81951 1963
9aa983d2
JH
1964 if (SvUTF8(lsv))
1965 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1966 if (offs > (I32)len)
6ff81951 1967 offs = len;
eb160463 1968 if (rem + offs > (I32)len)
6ff81951
GS
1969 rem = len - offs;
1970 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1971 if (SvUTF8(lsv))
2ef4b674 1972 SvUTF8_on(sv);
6ff81951
GS
1973 return 0;
1974}
1975
1976int
864dbfa3 1977Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1978{
97aff369 1979 dVAR;
9aa983d2 1980 STRLEN len;
5fcbf73d 1981 const char * const tmps = SvPV_const(sv, len);
dd374669 1982 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1983 I32 lvoff = LvTARGOFF(sv);
1984 I32 lvlen = LvTARGLEN(sv);
8772537c 1985 PERL_UNUSED_ARG(mg);
075a4a2b 1986
1aa99e6b 1987 if (DO_UTF8(sv)) {
9aa983d2
JH
1988 sv_utf8_upgrade(lsv);
1989 sv_pos_u2b(lsv, &lvoff, &lvlen);
1990 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1991 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1992 SvUTF8_on(lsv);
1993 }
9bf12eaf 1994 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1995 const char *utf8;
9aa983d2 1996 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1997 LvTARGLEN(sv) = len;
5fcbf73d
AL
1998 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1999 sv_insert(lsv, lvoff, lvlen, utf8, len);
2000 Safefree(utf8);
1aa99e6b 2001 }
b76f3ce2
GB
2002 else {
2003 sv_insert(lsv, lvoff, lvlen, tmps, len);
2004 LvTARGLEN(sv) = len;
2005 }
2006
1aa99e6b 2007
79072805
LW
2008 return 0;
2009}
2010
2011int
864dbfa3 2012Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2013{
97aff369 2014 dVAR;
8772537c 2015 PERL_UNUSED_ARG(sv);
27cc343c 2016 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2017 return 0;
2018}
2019
2020int
864dbfa3 2021Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2022{
97aff369 2023 dVAR;
8772537c 2024 PERL_UNUSED_ARG(sv);
b01e650a
DM
2025 /* update taint status */
2026 if (PL_tainted)
2027 mg->mg_len |= 1;
2028 else
2029 mg->mg_len &= ~1;
463ee0b2
LW
2030 return 0;
2031}
2032
2033int
864dbfa3 2034Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2035{
35a4481c 2036 SV * const lsv = LvTARG(sv);
8772537c 2037 PERL_UNUSED_ARG(mg);
6ff81951 2038
6136c704
AL
2039 if (lsv)
2040 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2041 else
0c34ef67 2042 SvOK_off(sv);
6ff81951 2043
6ff81951
GS
2044 return 0;
2045}
2046
2047int
864dbfa3 2048Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2049{
8772537c 2050 PERL_UNUSED_ARG(mg);
79072805
LW
2051 do_vecset(sv); /* XXX slurp this routine */
2052 return 0;
2053}
2054
2055int
864dbfa3 2056Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2057{
97aff369 2058 dVAR;
a0714e2c 2059 SV *targ = NULL;
5f05dabc 2060 if (LvTARGLEN(sv)) {
68dc0745 2061 if (mg->mg_obj) {
8772537c
AL
2062 SV * const ahv = LvTARG(sv);
2063 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2064 if (he)
2065 targ = HeVAL(he);
68dc0745
PP
2066 }
2067 else {
8772537c 2068 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2069 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2070 targ = AvARRAY(av)[LvTARGOFF(sv)];
2071 }
46da273f 2072 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2073 /* somebody else defined it for us */
2074 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2075 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2076 LvTARGLEN(sv) = 0;
2077 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2078 mg->mg_obj = NULL;
68dc0745
PP
2079 mg->mg_flags &= ~MGf_REFCOUNTED;
2080 }
5f05dabc 2081 }
71be2cbc
PP
2082 else
2083 targ = LvTARG(sv);
3280af22 2084 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2085 return 0;
2086}
2087
2088int
864dbfa3 2089Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2090{
8772537c 2091 PERL_UNUSED_ARG(mg);
71be2cbc 2092 if (LvTARGLEN(sv))
68dc0745
PP
2093 vivify_defelem(sv);
2094 if (LvTARG(sv)) {
5f05dabc 2095 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2096 SvSETMAGIC(LvTARG(sv));
2097 }
5f05dabc
PP
2098 return 0;
2099}
2100
71be2cbc 2101void
864dbfa3 2102Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2103{
97aff369 2104 dVAR;
74e13ce4 2105 MAGIC *mg;
a0714e2c 2106 SV *value = NULL;
71be2cbc 2107
14befaf4 2108 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2109 return;
68dc0745 2110 if (mg->mg_obj) {
8772537c
AL
2111 SV * const ahv = LvTARG(sv);
2112 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2113 if (he)
2114 value = HeVAL(he);
3280af22 2115 if (!value || value == &PL_sv_undef)
be2597df 2116 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2117 }
68dc0745 2118 else {
8772537c 2119 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2120 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2121 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2122 else {
d4c19fe8 2123 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2124 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2125 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2126 }
2127 }
b37c2d43 2128 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2129 SvREFCNT_dec(LvTARG(sv));
2130 LvTARG(sv) = value;
71be2cbc 2131 LvTARGLEN(sv) = 0;
68dc0745 2132 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2133 mg->mg_obj = NULL;
68dc0745 2134 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2135}
2136
2137int
864dbfa3 2138Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2139{
86f55936 2140 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2141}
2142
2143int
864dbfa3 2144Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2145{
96a5add6 2146 PERL_UNUSED_CONTEXT;
565764a8 2147 mg->mg_len = -1;
c6496cc7 2148 SvSCREAM_off(sv);
93a17b20
LW
2149 return 0;
2150}
2151
2152int
864dbfa3 2153Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2154{
8772537c 2155 PERL_UNUSED_ARG(mg);
14befaf4 2156 sv_unmagic(sv, PERL_MAGIC_bm);
b84d1fce 2157 SvTAIL_off(sv);
79072805
LW
2158 SvVALID_off(sv);
2159 return 0;
2160}
2161
2162int
864dbfa3 2163Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2164{
8772537c 2165 PERL_UNUSED_ARG(mg);
14befaf4 2166 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2167 SvCOMPILED_off(sv);
2168 return 0;
2169}
2170
2171int
864dbfa3 2172Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2173{
35a4481c 2174 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2175
2176 if (uf && uf->uf_set)
24f81a43 2177 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2178 return 0;
2179}
2180
c277df42 2181int
faf82a0b
AE
2182Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2183{
8772537c 2184 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2185 sv_unmagic(sv, PERL_MAGIC_qr);
2186 return 0;
2187}
2188
2189int
864dbfa3 2190Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2191{
97aff369 2192 dVAR;
8772537c
AL
2193 regexp * const re = (regexp *)mg->mg_obj;
2194 PERL_UNUSED_ARG(sv);
2195
c277df42
IZ
2196 ReREFCNT_dec(re);
2197 return 0;
2198}
2199
7a4c00b4 2200#ifdef USE_LOCALE_COLLATE
79072805 2201int
864dbfa3 2202Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2203{
2204 /*
838b5b74 2205 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2206 * and vanished with a faint plop.
2207 */
96a5add6 2208 PERL_UNUSED_CONTEXT;
8772537c 2209 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2210 if (mg->mg_ptr) {
2211 Safefree(mg->mg_ptr);
2212 mg->mg_ptr = NULL;
565764a8 2213 mg->mg_len = -1;
7a4c00b4 2214 }
bbce6d69
PP
2215 return 0;
2216}
7a4c00b4 2217#endif /* USE_LOCALE_COLLATE */
bbce6d69 2218
7e8c5dac
HS
2219/* Just clear the UTF-8 cache data. */
2220int
2221Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2222{
96a5add6 2223 PERL_UNUSED_CONTEXT;
8772537c 2224 PERL_UNUSED_ARG(sv);
7e8c5dac 2225 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2226 mg->mg_ptr = NULL;
7e8c5dac
HS
2227 mg->mg_len = -1; /* The mg_len holds the len cache. */
2228 return 0;
2229}
2230
bbce6d69 2231int
864dbfa3 2232Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2233{
97aff369 2234 dVAR;
e1ec3a88 2235 register const char *s;
2fdbfb4d
AB
2236 register I32 paren;
2237 register const REGEXP * rx;
2238 const char * const remaining = mg->mg_ptr + 1;
79072805 2239 I32 i;
8990e307 2240 STRLEN len;
2fdbfb4d 2241
79072805 2242 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2243 case '\015': /* $^MATCH */
2244 if (strEQ(remaining, "ATCH"))
2245 goto do_match;
2246 case '`': /* ${^PREMATCH} caught below */
2247 do_prematch:
f1b875a0 2248 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2249 goto setparen;
2250 case '\'': /* ${^POSTMATCH} caught below */
2251 do_postmatch:
f1b875a0 2252 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2253 goto setparen;
2254 case '&':
2255 do_match:
f1b875a0 2256 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2257 goto setparen;
2258 case '1': case '2': case '3': case '4':
2259 case '5': case '6': case '7': case '8': case '9':
104a8018 2260 paren = atoi(mg->mg_ptr);
2fdbfb4d 2261 setparen:
1e05feb3 2262 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
2263 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2264 break;
1e05feb3 2265 } else {
2fdbfb4d
AB
2266 /* Croak with a READONLY error when a numbered match var is
2267 * set without a previous pattern match. Unless it's C<local $1>
2268 */
2269 if (!PL_localizing) {
2270 Perl_croak(aTHX_ PL_no_modify);
2271 }
2272 }
748a9306 2273 case '\001': /* ^A */
3280af22 2274 sv_setsv(PL_bodytarget, sv);
748a9306 2275 break;
49460fe6 2276 case '\003': /* ^C */
38ab35f8 2277 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2278 break;
2279
79072805 2280 case '\004': /* ^D */
b4ab917c 2281#ifdef DEBUGGING
b83604b4 2282 s = SvPV_nolen_const(sv);
ddcf8bc1 2283 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2284 DEBUG_x(dump_all());
b4ab917c 2285#else
38ab35f8 2286 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2287#endif
79072805 2288 break;
28f23441 2289 case '\005': /* ^E */
d0063567 2290 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2291#ifdef MACOS_TRADITIONAL
38ab35f8 2292 gMacPerl_OSErr = SvIV(sv);
28f23441 2293#else
cd39f2b6 2294# ifdef VMS
38ab35f8 2295 set_vaxc_errno(SvIV(sv));
048c1ddf 2296# else
cd39f2b6 2297# ifdef WIN32
d0063567 2298 SetLastError( SvIV(sv) );
cd39f2b6 2299# else
9fed8b87 2300# ifdef OS2
38ab35f8 2301 os2_setsyserrno(SvIV(sv));
9fed8b87 2302# else
d0063567 2303 /* will anyone ever use this? */
38ab35f8 2304 SETERRNO(SvIV(sv), 4);
cd39f2b6 2305# endif
048c1ddf
IZ
2306# endif
2307# endif
22fae026 2308#endif
d0063567
DK
2309 }
2310 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2311 if (PL_encoding)
2312 SvREFCNT_dec(PL_encoding);
2313 if (SvOK(sv) || SvGMAGICAL(sv)) {
2314 PL_encoding = newSVsv(sv);
2315 }
2316 else {
a0714e2c 2317 PL_encoding = NULL;
d0063567
DK
2318 }
2319 }
2320 break;
79072805 2321 case '\006': /* ^F */
38ab35f8 2322 PL_maxsysfd = SvIV(sv);
79072805 2323 break;
a0d0e21e 2324 case '\010': /* ^H */
38ab35f8 2325 PL_hints = SvIV(sv);
a0d0e21e 2326 break;
9d116dd7 2327 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2328 Safefree(PL_inplace);
bd61b366 2329 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2330 break;
28f23441 2331 case '\017': /* ^O */
ac27b0f5 2332 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2333 Safefree(PL_osname);
bd61b366 2334 PL_osname = NULL;
3511154c
DM
2335 if (SvOK(sv)) {
2336 TAINT_PROPER("assigning to $^O");
2e0de35c 2337 PL_osname = savesvpv(sv);
3511154c 2338 }
ac27b0f5
NIS
2339 }
2340 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2341 STRLEN len;
2342 const char *const start = SvPV(sv, len);
b54fc2b6 2343 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2344 SV *tmp;
2345 struct refcounted_he *tmp_he;
2346
2347
2348 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2349 PL_hints
2350 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2351
2352 /* Opening for input is more common than opening for output, so
2353 ensure that hints for input are sooner on linked list. */
2354 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2355 : newSVpvs(""));
2356 SvFLAGS(tmp) |= SvUTF8(sv);
2357
2358 tmp_he
2359 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2360 sv_2mortal(newSVpvs("open>")), tmp);
2361
2362 /* The UTF-8 setting is carried over */
2363 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2364
11bcd5da 2365 PL_compiling.cop_hints_hash
8b850bd5
NC
2366 = Perl_refcounted_he_new(aTHX_ tmp_he,
2367 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2368 }
28f23441 2369 break;
79072805 2370 case '\020': /* ^P */
2fdbfb4d
AB
2371 if (*remaining == '\0') { /* ^P */
2372 PL_perldb = SvIV(sv);
2373 if (PL_perldb && !PL_DBsingle)
2374 init_debugger();
2375 break;
2376 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2377 goto do_prematch;
2378 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2379 goto do_postmatch;
2380 }
79072805 2381 case '\024': /* ^T */
88e89b8a 2382#ifdef BIG_TIME
6b88bc9c 2383 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2384#else
38ab35f8 2385 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2386#endif
79072805 2387 break;
e07ea26a
NC
2388 case '\025': /* ^UTF8CACHE */
2389 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2390 PL_utf8cache = (signed char) sv_2iv(sv);
2391 }
2392 break;
fde18df1 2393 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2394 if (*(mg->mg_ptr+1) == '\0') {
2395 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2396 i = SvIV(sv);
ac27b0f5 2397 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2398 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2399 }
599cee73 2400 }
0a378802 2401 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2402 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2403 if (!SvPOK(sv) && PL_localizing) {
2404 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2405 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2406 break;
2407 }
f4fc7782 2408 {
b5477537 2409 STRLEN len, i;
d3a7d8c7 2410 int accumulate = 0 ;
f4fc7782 2411 int any_fatals = 0 ;
b83604b4 2412 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2413 for (i = 0 ; i < len ; ++i) {
2414 accumulate |= ptr[i] ;
2415 any_fatals |= (ptr[i] & 0xAA) ;
2416 }
4243c432
NC
2417 if (!accumulate) {
2418 if (!specialWARN(PL_compiling.cop_warnings))
2419 PerlMemShared_free(PL_compiling.cop_warnings);
2420 PL_compiling.cop_warnings = pWARN_NONE;
2421 }
72dc9ed5
NC
2422 /* Yuck. I can't see how to abstract this: */
2423 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2424 WARN_ALL) && !any_fatals) {
4243c432
NC
2425 if (!specialWARN(PL_compiling.cop_warnings))
2426 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2427 PL_compiling.cop_warnings = pWARN_ALL;
2428 PL_dowarn |= G_WARN_ONCE ;
727405f8 2429 }
d3a7d8c7 2430 else {
72dc9ed5
NC
2431 STRLEN len;
2432 const char *const p = SvPV_const(sv, len);
2433
2434 PL_compiling.cop_warnings
8ee4cf24 2435 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2436 p, len);
2437
d3a7d8c7
GS
2438 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2439 PL_dowarn |= G_WARN_ONCE ;
2440 }
f4fc7782 2441
d3a7d8c7 2442 }
4438c4b7 2443 }
971a9dd3 2444 }
79072805
LW
2445 break;
2446 case '.':
3280af22
NIS
2447 if (PL_localizing) {
2448 if (PL_localizing == 1)
7766f137 2449 SAVESPTR(PL_last_in_gv);
748a9306 2450 }
3280af22 2451 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2452 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2453 break;
2454 case '^':
3280af22 2455 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2456 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2457 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2458 break;
2459 case '~':
3280af22 2460 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2461 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2462 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2463 break;
2464 case '=':
38ab35f8 2465 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2466 break;
2467 case '-':
38ab35f8 2468 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2469 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2470 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2471 break;
2472 case '%':
38ab35f8 2473 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2474 break;
2475 case '|':
4b65379b 2476 {
8772537c 2477 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2478 if(!io)
2479 break;
38ab35f8 2480 if ((SvIV(sv)) == 0)
4b65379b
CS
2481 IoFLAGS(io) &= ~IOf_FLUSH;
2482 else {
2483 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2484 PerlIO *ofp = IoOFP(io);
2485 if (ofp)
2486 (void)PerlIO_flush(ofp);
2487 IoFLAGS(io) |= IOf_FLUSH;
2488 }
2489 }
79072805
LW
2490 }
2491 break;
79072805 2492 case '/':
3280af22 2493 SvREFCNT_dec(PL_rs);
8bfdd7d9 2494 PL_rs = newSVsv(sv);
79072805
LW
2495 break;
2496 case '\\':
7889fe52
NIS
2497 if (PL_ors_sv)
2498 SvREFCNT_dec(PL_ors_sv);
009c130f 2499 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2500 PL_ors_sv = newSVsv(sv);
009c130f 2501 }
e3c19b7b 2502 else {
a0714e2c 2503 PL_ors_sv = NULL;
e3c19b7b 2504 }
79072805
LW
2505 break;
2506 case ',':
7889fe52
NIS
2507 if (PL_ofs_sv)
2508 SvREFCNT_dec(PL_ofs_sv);
2509 if (SvOK(sv) || SvGMAGICAL(sv)) {
2510 PL_ofs_sv = newSVsv(sv);
2511 }
2512 else {
a0714e2c 2513 PL_ofs_sv = NULL;
7889fe52 2514 }
79072805 2515 break;
79072805 2516 case '[':
38ab35f8 2517 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2518 break;
2519 case '?':
ff0cee69 2520#ifdef COMPLEX_STATUS
6b88bc9c
GS
2521 if (PL_localizing == 2) {
2522 PL_statusvalue = LvTARGOFF(sv);
2523 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2524 }
2525 else
2526#endif
2527#ifdef VMSISH_STATUS
2528 if (VMSISH_STATUS)
fb38d079 2529 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2530 else
2531#endif
38ab35f8 2532 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2533 break;
2534 case '!':
93189314
JH
2535 {
2536#ifdef VMS
2537# define PERL_VMS_BANG vaxc$errno
2538#else
2539# define PERL_VMS_BANG 0
2540#endif
91487cfc 2541 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2542 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2543 }
79072805
LW
2544 break;
2545 case '<':
38ab35f8 2546 PL_uid = SvIV(sv);
3280af22
NIS
2547 if (PL_delaymagic) {
2548 PL_delaymagic |= DM_RUID;
79072805
LW
2549 break; /* don't do magic till later */
2550 }
2551#ifdef HAS_SETRUID
b28d0864 2552 (void)setruid((Uid_t)PL_uid);
79072805
LW
2553#else
2554#ifdef HAS_SETREUID
3280af22 2555 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2556#else
85e6fe83 2557#ifdef HAS_SETRESUID
b28d0864 2558 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2559#else
75870ed3 2560 if (PL_uid == PL_euid) { /* special case $< = $> */
2561#ifdef PERL_DARWIN
2562 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2563 if (PL_uid != 0 && PerlProc_getuid() == 0)
2564 (void)PerlProc_setuid(0);
2565#endif
b28d0864 2566 (void)PerlProc_setuid(PL_uid);
75870ed3 2567 } else {
d8eceb89 2568 PL_uid = PerlProc_getuid();
cea2e8a9 2569 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2570 }
79072805
LW
2571#endif
2572#endif
85e6fe83 2573#endif
d8eceb89 2574 PL_uid = PerlProc_getuid();
3280af22 2575 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2576 break;
2577 case '>':
38ab35f8 2578 PL_euid = SvIV(sv);
3280af22
NIS
2579 if (PL_delaymagic) {
2580 PL_delaymagic |= DM_EUID;
79072805
LW
2581 break; /* don't do magic till later */
2582 }
2583#ifdef HAS_SETEUID
3280af22 2584 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2585#else
2586#ifdef HAS_SETREUID
b28d0864 2587 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2588#else
2589#ifdef HAS_SETRESUID
6b88bc9c 2590 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2591#else
b28d0864
NIS
2592 if (PL_euid == PL_uid) /* special case $> = $< */
2593 PerlProc_setuid(PL_euid);
a0d0e21e 2594 else {
e8ee3774 2595 PL_euid = PerlProc_geteuid();
cea2e8a9 2596 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2597 }
79072805
LW
2598#endif
2599#endif
85e6fe83 2600#endif
d8eceb89 2601 PL_euid = PerlProc_geteuid();
3280af22 2602 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2603 break;
2604 case '(':
38ab35f8 2605 PL_gid = SvIV(sv);
3280af22
NIS
2606 if (PL_delaymagic) {
2607 PL_delaymagic |= DM_RGID;
79072805
LW
2608 break; /* don't do magic till later */
2609 }
2610#ifdef HAS_SETRGID
b28d0864 2611 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2612#else
2613#ifdef HAS_SETREGID
3280af22 2614 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2615#else
2616#ifdef HAS_SETRESGID
b28d0864 2617 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2618#else
b28d0864
NIS
2619 if (PL_gid == PL_egid) /* special case $( = $) */
2620 (void)PerlProc_setgid(PL_gid);
748a9306 2621 else {
d8eceb89 2622 PL_gid = PerlProc_getgid();
cea2e8a9 2623 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2624 }
79072805
LW
2625#endif
2626#endif
85e6fe83 2627#endif
d8eceb89 2628 PL_gid = PerlProc_getgid();
3280af22 2629 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2630 break;
2631 case ')':
5cd24f17
PP
2632#ifdef HAS_SETGROUPS
2633 {
b83604b4 2634 const char *p = SvPV_const(sv, len);
757f63d8
SP
2635 Groups_t *gary = NULL;
2636
2637 while (isSPACE(*p))
2638 ++p;
2639 PL_egid = Atol(p);
2640 for (i = 0; i < NGROUPS; ++i) {
2641 while (*p && !isSPACE(*p))
2642 ++p;
2643 while (isSPACE(*p))
2644 ++p;
2645 if (!*p)
2646 break;
2647 if(!gary)
2648 Newx(gary, i + 1, Groups_t);
2649 else
2650 Renew(gary, i + 1, Groups_t);
2651 gary[i] = Atol(p);
2652 }
2653 if (i)
2654 (void)setgroups(i, gary);
f5a63d97 2655 Safefree(gary);
5cd24f17
PP
2656 }
2657#else /* HAS_SETGROUPS */
38ab35f8 2658 PL_egid = SvIV(sv);
5cd24f17 2659#endif /* HAS_SETGROUPS */
3280af22
NIS
2660 if (PL_delaymagic) {
2661 PL_delaymagic |= DM_EGID;
79072805
LW
2662 break; /* don't do magic till later */
2663 }
2664#ifdef HAS_SETEGID
3280af22 2665 (void)setegid((Gid_t)PL_egid);
79072805
LW
2666#else
2667#ifdef HAS_SETREGID
b28d0864 2668 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2669#else
2670#ifdef HAS_SETRESGID
b28d0864 2671 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2672#else
b28d0864
NIS
2673 if (PL_egid == PL_gid) /* special case $) = $( */
2674 (void)PerlProc_setgid(PL_egid);
748a9306 2675 else {
d8eceb89 2676 PL_egid = PerlProc_getegid();
cea2e8a9 2677 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2678 }
79072805
LW
2679#endif
2680#endif
85e6fe83 2681#endif
d8eceb89 2682 PL_egid = PerlProc_getegid();
3280af22 2683 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2684 break;
2685 case ':':
2d8e6c8d 2686 PL_chopset = SvPV_force(sv,len);
79072805 2687 break;
cd39f2b6 2688#ifndef MACOS_TRADITIONAL
79072805 2689 case '0':
e2975953 2690 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2691#ifdef HAS_SETPROCTITLE
2692 /* The BSDs don't show the argv[] in ps(1) output, they
2693 * show a string from the process struct and provide
2694 * the setproctitle() routine to manipulate that. */
a2722ac9 2695 if (PL_origalen != 1) {
b83604b4 2696 s = SvPV_const(sv, len);
98b76f99 2697# if __FreeBSD_version > 410001
9aad2c0e 2698 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2699 * but not the "(perl) suffix from the ps(1)
2700 * output, because that's what ps(1) shows if the
2701 * argv[] is modified. */
6f2ad931 2702 setproctitle("-%s", s);
9aad2c0e 2703# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2704 /* This doesn't really work if you assume that
2705 * $0 = 'foobar'; will wipe out 'perl' from the $0
2706 * because in ps(1) output the result will be like
2707 * sprintf("perl: %s (perl)", s)
2708 * I guess this is a security feature:
2709 * one (a user process) cannot get rid of the original name.
2710 * --jhi */
2711 setproctitle("%s", s);
2712# endif
2713 }
9d3968b2 2714#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2715 if (PL_origalen != 1) {
17aa7f3d 2716 union pstun un;
b83604b4 2717 s = SvPV_const(sv, len);
6867be6d 2718 un.pst_command = (char *)s;
17aa7f3d
JH
2719 pstat(PSTAT_SETCMD, un, len, 0, 0);
2720 }
9d3968b2 2721#else
2d2af554
GA
2722 if (PL_origalen > 1) {
2723 /* PL_origalen is set in perl_parse(). */
2724 s = SvPV_force(sv,len);
2725 if (len >= (STRLEN)PL_origalen-1) {
2726 /* Longer than original, will be truncated. We assume that
2727 * PL_origalen bytes are available. */
2728 Copy(s, PL_origargv[0], PL_origalen-1, char);
2729 }
2730 else {
2731 /* Shorter than original, will be padded. */
235ac35d 2732#ifdef PERL_DARWIN
60777a0d
JH
2733 /* Special case for Mac OS X: see [perl #38868] */
2734 const int pad = 0;
235ac35d 2735#else
8a89a4f1
MB
2736 /* Is the space counterintuitive? Yes.
2737 * (You were expecting \0?)
2738 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2739 * --jhi */
60777a0d 2740 const int pad = ' ';
235ac35d 2741#endif
60777a0d
JH
2742 Copy(s, PL_origargv[0], len, char);
2743 PL_origargv[0][len] = 0;
2744 memset(PL_origargv[0] + len + 1,
2745 pad, PL_origalen - len - 1);
2d2af554
GA
2746 }
2747 PL_origargv[0][PL_origalen-1] = 0;
2748 for (i = 1; i < PL_origargc; i++)
2749 PL_origargv[i] = 0;
79072805 2750 }
9d3968b2 2751#endif
e2975953 2752 UNLOCK_DOLLARZERO_MUTEX;
79072805 2753 break;
cd39f2b6 2754#endif
79072805
LW
2755 }
2756 return 0;
2757}
2758
2759I32
35a4481c 2760Perl_whichsig(pTHX_ const char *sig)
79072805 2761{
aadb217d 2762 register char* const* sigv;
96a5add6 2763 PERL_UNUSED_CONTEXT;
79072805 2764
aadb217d 2765 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2766 if (strEQ(sig,*sigv))
aadb217d 2767 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2768#ifdef SIGCLD
2769 if (strEQ(sig,"CHLD"))
2770 return SIGCLD;
2771#endif
2772#ifdef SIGCHLD
2773 if (strEQ(sig,"CLD"))
2774 return SIGCHLD;
2775#endif
7f1236c0 2776 return -1;
79072805
LW
2777}
2778
ecfc5424 2779Signal_t
1e82f5a6 2780#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2781Perl_sighandler(int sig, ...)
1e82f5a6
SH
2782#else
2783Perl_sighandler(int sig)
2784#endif
79072805 2785{
1018e26f
NIS
2786#ifdef PERL_GET_SIG_CONTEXT
2787 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2788#else
cea2e8a9 2789 dTHX;
71d280e3 2790#endif
79072805 2791 dSP;
a0714e2c
SS
2792 GV *gv = NULL;
2793 SV *sv = NULL;
8772537c 2794 SV * const tSv = PL_Sv;
601f1833 2795 CV *cv = NULL;
533c011a 2796 OP *myop = PL_op;
84902520 2797 U32 flags = 0;
8772537c 2798 XPV * const tXpv = PL_Xpv;
71d280e3 2799
3280af22 2800 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2801 flags |= 1;
3280af22 2802 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2803 flags |= 4;
3280af22 2804 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2805 flags |= 16;
2806
727405f8 2807 if (!PL_psig_ptr[sig]) {
99ef548b 2808 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2809 PL_sig_name[sig]);
2810 exit(sig);
2811 }
ff0cee69 2812
84902520
TB
2813 /* Max number of items pushed there is 3*n or 4. We cannot fix
2814 infinity, so we fix 4 (in fact 5): */
2815 if (flags & 1) {
3280af22 2816 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2817 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2818 }
ac27b0f5 2819 if (flags & 4)
3280af22 2820 PL_markstack_ptr++; /* Protect mark. */
84902520 2821 if (flags & 16)
3280af22 2822 PL_scopestack_ix += 1;
84902520 2823 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2824 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2825 || SvTYPE(cv) != SVt_PVCV) {
2826 HV *st;
f2c0649b 2827 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2828 }
84902520 2829
a0d0e21e 2830 if (!cv || !CvROOT(cv)) {
599cee73 2831 if (ckWARN(WARN_SIGNAL))
9014280d 2832 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2833 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2834 : ((cv && CvGV(cv))
2835 ? GvENAME(CvGV(cv))
2836 : "__ANON__")));
2837 goto cleanup;
79072805
LW
2838 }
2839
22c35a8c 2840 if(PL_psig_name[sig]) {
b37c2d43 2841 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2842 flags |= 64;
df3728a2 2843#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2844 PL_sig_sv = sv;
df3728a2 2845#endif
84902520 2846 } else {
ff0cee69 2847 sv = sv_newmortal();
22c35a8c 2848 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2849 }
e336de0d 2850
e788e7d3 2851 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2852 PUSHMARK(SP);
79072805 2853 PUSHs(sv);
8aad04aa
JH
2854#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2855 {
2856 struct sigaction oact;
2857
2858 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2859 siginfo_t *sip;
2860 va_list args;
2861
2862 va_start(args, sig);
2863 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2864 if (sip) {
2865 HV *sih = newHV();
2866 SV *rv = newRV_noinc((SV*)sih);
2867 /* The siginfo fields signo, code, errno, pid, uid,
2868 * addr, status, and band are defined by POSIX/SUSv3. */
04fe65b0
RGS
2869 (void)hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2870 (void)hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2871#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 2872 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2873 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2874 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2875 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2876 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2877 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2878#endif
8aad04aa
JH
2879 EXTEND(SP, 2);
2880 PUSHs((SV*)rv);
10edeb5d 2881 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2882 }
b4552a27 2883
31427afe 2884 va_end(args);
8aad04aa
JH
2885 }
2886 }
2887#endif
79072805 2888 PUTBACK;
a0d0e21e 2889
1b266415 2890 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2891
d3acc0f7 2892 POPSTACK;
1b266415 2893 if (SvTRUE(ERRSV)) {
1d615522 2894#ifndef PERL_MICRO
983dbef6 2895#ifdef HAS_SIGPROCMASK
1b266415
NIS
2896 /* Handler "died", for example to get out of a restart-able read().
2897 * Before we re-do that on its behalf re-enable the signal which was
2898 * blocked by the system when we entered.
2899 */
2900 sigset_t set;
2901 sigemptyset(&set);
2902 sigaddset(&set,sig);
2903 sigprocmask(SIG_UNBLOCK, &set, NULL);
2904#else
2905 /* Not clear if this will work */
2906 (void)rsignal(sig, SIG_IGN);
5c1546dc 2907 (void)rsignal(sig, PL_csighandlerp);
1b266415 2908#endif
1d615522 2909#endif /* !PERL_MICRO */
bd61b366 2910 Perl_die(aTHX_ NULL);
1b266415 2911 }
00d579c5 2912cleanup:
84902520 2913 if (flags & 1)
3280af22 2914 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2915 if (flags & 4)
3280af22 2916 PL_markstack_ptr--;
84902520 2917 if (flags & 16)
3280af22 2918 PL_scopestack_ix -= 1;
84902520
TB
2919 if (flags & 64)
2920 SvREFCNT_dec(sv);
533c011a 2921 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2922
3280af22
NIS
2923 PL_Sv = tSv; /* Restore global temporaries. */
2924 PL_Xpv = tXpv;
53bb94e2 2925 return;
79072805 2926}
4e35701f
NIS
2927
2928
51371543 2929static void
8772537c 2930S_restore_magic(pTHX_ const void *p)
51371543 2931{
97aff369 2932 dVAR;
8772537c
AL
2933 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2934 SV* const sv = mgs->mgs_sv;
51371543
GS
2935
2936 if (!sv)
2937 return;
2938
2939 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2940 {
f8c7b90f 2941#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2942 /* While magic was saved (and off) sv_setsv may well have seen
2943 this SV as a prime candidate for COW. */
2944 if (SvIsCOW(sv))
e424a81e 2945 sv_force_normal_flags(sv, 0);
f9701176
NC
2946#endif
2947
51371543
GS
2948 if (mgs->mgs_flags)
2949 SvFLAGS(sv) |= mgs->mgs_flags;
2950 else
2951 mg_magical(sv);
2b77b520
YST
2952 if (SvGMAGICAL(sv)) {
2953 /* downgrade public flags to private,
2954 and discard any other private flags */
2955
10edeb5d
JH
2956 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2957 if (pubflags) {
2958 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2959 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2960 }
2961 }
51371543
GS
2962 }
2963
2964 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2965
2966 /* If we're still on top of the stack, pop us off. (That condition
2967 * will be satisfied if restore_magic was called explicitly, but *not*
2968 * if it's being called via leave_scope.)
2969 * The reason for doing this is that otherwise, things like sv_2cv()
2970 * may leave alloc gunk on the savestack, and some code
2971 * (e.g. sighandler) doesn't expect that...
2972 */
2973 if (PL_savestack_ix == mgs->mgs_ss_ix)
2974 {
2975 I32 popval = SSPOPINT;
c76ac1ee 2976 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2977 PL_savestack_ix -= 2;
2978 popval = SSPOPINT;
2979 assert(popval == SAVEt_ALLOC);
2980 popval = SSPOPINT;
2981 PL_savestack_ix -= popval;
2982 }
2983
2984}
2985
2986static void
8772537c 2987S_unwind_handler_stack(pTHX_ const void *p)
51371543 2988{
27da23d5 2989 dVAR;
e1ec3a88 2990 const U32 flags = *(const U32*)p;
51371543
GS
2991
2992 if (flags & 1)
2993 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2994#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2995 if (flags & 64)
27da23d5 2996 SvREFCNT_dec(PL_sig_sv);
df3728a2 2997#endif
51371543 2998}
1018e26f 2999
66610fdd 3000/*
b3ca2e83
NC
3001=for apidoc magic_sethint
3002
3003Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
3004C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3005anything that would need a deep copy. Maybe we should warn if we find a
3006reference.
b3ca2e83
NC
3007
3008=cut
3009*/
3010int
3011Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3012{
3013 dVAR;
3014 assert(mg->mg_len == HEf_SVKEY);
3015
e6e3e454
NC
3016 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3017 an alternative leaf in there, with PL_compiling.cop_hints being used if
3018 it's NULL. If needed for threads, the alternative could lock a mutex,
3019 or take other more complex action. */
3020
5b9c0671
NC
3021 /* Something changed in %^H, so it will need to be restored on scope exit.
3022 Doing this here saves a lot of doing it manually in perl code (and
3023 forgetting to do it, and consequent subtle errors. */
3024 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3025 PL_compiling.cop_hints_hash
3026 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 3027 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
3028 return 0;
3029}
3030
3031/*
3032=for apidoc magic_sethint
3033
c28fe1ec
NC
3034Triggered by a delete from %^H, records the key to
3035C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3036
3037=cut
3038*/
3039int
3040Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3041{
3042 dVAR;
f5a63d97
AL
3043 PERL_UNUSED_ARG(sv);
3044
b3ca2e83
NC
3045 assert(mg->mg_len == HEf_SVKEY);
3046
b3f24c00
MHM
3047 PERL_UNUSED_ARG(sv);
3048
5b9c0671 3049 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3050 PL_compiling.cop_hints_hash
3051 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3052 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3053 return 0;
3054}
3055
3056/*
66610fdd
RGS
3057 * Local variables:
3058 * c-indentation-style: bsd
3059 * c-basic-offset: 4
3060 * indent-tabs-mode: t
3061 * End:
3062 *
37442d52
RGS
3063 * ex: set ts=8 sts=4 sw=4 noet:
3064 */