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Adapt definition of Sighandler_t to go with change #32012
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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 58#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 59Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 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 1309#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1310Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 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 1320#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
fe5bfecd 1321#endif
23ada85b 1322#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1323 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1324 if (PL_sig_ignoring[sig]) return;
85b332e2 1325#endif
2e34cc90 1326#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1327 if (PL_sig_defaulting[sig])
2e34cc90
CL
1328#ifdef KILL_BY_SIGPRC
1329 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1330#else
1331 exit(1);
1332#endif
1333#endif
fe5bfecd 1334#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
fe5bfecd 1335#endif
853d2c32
RGS
1336 if (
1337#ifdef SIGILL
1338 sig == SIGILL ||
1339#endif
1340#ifdef SIGBUS
1341 sig == SIGBUS ||
1342#endif
1343#ifdef SIGSEGV
1344 sig == SIGSEGV ||
1345#endif
1346 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3
JH
1347 /* Call the perl level handler now--
1348 * with risk we may be in malloc() etc. */
80626cf1 1349 (*PL_sighandlerp)(sig, NULL, NULL);
4ffa73a3 1350 else
dd374669 1351 S_raise_signal(aTHX_ sig);
fe5bfecd 1352#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
fe5bfecd 1353#endif
0a8e0eff
NIS
1354}
1355
2e34cc90
CL
1356#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1357void
1358Perl_csighandler_init(void)
1359{
1360 int sig;
27da23d5 1361 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1362
1363 for (sig = 1; sig < SIG_SIZE; sig++) {
1364#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1365 dTHX;
27da23d5 1366 PL_sig_defaulting[sig] = 1;
5c1546dc 1367 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1368#endif
1369#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1370 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1371#endif
1372 }
27da23d5 1373 PL_sig_handlers_initted = 1;
2e34cc90
CL
1374}
1375#endif
1376
0a8e0eff
NIS
1377void
1378Perl_despatch_signals(pTHX)
1379{
97aff369 1380 dVAR;
0a8e0eff
NIS
1381 int sig;
1382 PL_sig_pending = 0;
1383 for (sig = 1; sig < SIG_SIZE; sig++) {
1384 if (PL_psig_pend[sig]) {
25da4428
JH
1385 PERL_BLOCKSIG_ADD(set, sig);
1386 PL_psig_pend[sig] = 0;
1387 PERL_BLOCKSIG_BLOCK(set);
80626cf1 1388 (*PL_sighandlerp)(sig, NULL, NULL);
25da4428 1389 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1390 }
1391 }
1392}
1393
85e6fe83 1394int
864dbfa3 1395Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1396{
27da23d5 1397 dVAR;
79072805 1398 I32 i;
cbbf8932 1399 SV** svp = NULL;
2d4fcd5e
AJ
1400 /* Need to be careful with SvREFCNT_dec(), because that can have side
1401 * effects (due to closures). We must make sure that the new disposition
1402 * is in place before it is called.
1403 */
cbbf8932 1404 SV* to_dec = NULL;
e72dc28c 1405 STRLEN len;
2d4fcd5e
AJ
1406#ifdef HAS_SIGPROCMASK
1407 sigset_t set, save;
1408 SV* save_sv;
1409#endif
a0d0e21e 1410
d5263905 1411 register const char *s = MgPV_const(mg,len);
748a9306
LW
1412 if (*s == '_') {
1413 if (strEQ(s,"__DIE__"))
3280af22 1414 svp = &PL_diehook;
748a9306 1415 else if (strEQ(s,"__WARN__"))
3280af22 1416 svp = &PL_warnhook;
748a9306 1417 else
cea2e8a9 1418 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1419 i = 0;
4633a7c4 1420 if (*svp) {
9289f461
RGS
1421 if (*svp != PERL_WARNHOOK_FATAL)
1422 to_dec = *svp;
cbbf8932 1423 *svp = NULL;
4633a7c4 1424 }
748a9306
LW
1425 }
1426 else {
1427 i = whichsig(s); /* ...no, a brick */
86d86cad 1428 if (i <= 0) {
e476b1b5 1429 if (ckWARN(WARN_SIGNAL))
9014280d 1430 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1431 return 0;
1432 }
2d4fcd5e
AJ
1433#ifdef HAS_SIGPROCMASK
1434 /* Avoid having the signal arrive at a bad time, if possible. */
1435 sigemptyset(&set);
1436 sigaddset(&set,i);
1437 sigprocmask(SIG_BLOCK, &set, &save);
1438 ENTER;
1439 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1440 SAVEFREESV(save_sv);
1441 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1442#endif
1443 PERL_ASYNC_CHECK();
2e34cc90 1444#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1445 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1446#endif
23ada85b 1447#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1448 PL_sig_ignoring[i] = 0;
85b332e2 1449#endif
2e34cc90 1450#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1451 PL_sig_defaulting[i] = 0;
2e34cc90 1452#endif
22c35a8c 1453 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1454 to_dec = PL_psig_ptr[i];
46da273f 1455 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1456 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1457 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1458 SvREADONLY_on(PL_psig_name[i]);
748a9306 1459 }
a0d0e21e 1460 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1461 if (i) {
5c1546dc 1462 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1463#ifdef HAS_SIGPROCMASK
1464 LEAVE;
1465#endif
1466 }
748a9306 1467 else
b37c2d43 1468 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1469 if(to_dec)
1470 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1471 return 0;
1472 }
baf38871 1473 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
748a9306 1474 if (strEQ(s,"IGNORE")) {
85b332e2 1475 if (i) {
23ada85b 1476#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1477 PL_sig_ignoring[i] = 1;
5c1546dc 1478 (void)rsignal(i, PL_csighandlerp);
85b332e2 1479#else
8aad04aa 1480 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1481#endif
2d4fcd5e 1482 }
748a9306
LW
1483 }
1484 else if (strEQ(s,"DEFAULT") || !*s) {
1485 if (i)
2e34cc90
CL
1486#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1487 {
27da23d5 1488 PL_sig_defaulting[i] = 1;
5c1546dc 1489 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1490 }
1491#else
8aad04aa 1492 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1493#endif
748a9306 1494 }
79072805 1495 else {
5aabfad6
PP
1496 /*
1497 * We should warn if HINT_STRICT_REFS, but without
1498 * access to a known hint bit in a known OP, we can't
1499 * tell whether HINT_STRICT_REFS is in force or not.
1500 */
46fc3d4c 1501 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1502 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1503 if (i)
5c1546dc 1504 (void)rsignal(i, PL_csighandlerp);
748a9306 1505 else
46da273f 1506 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1507 }
2d4fcd5e
AJ
1508#ifdef HAS_SIGPROCMASK
1509 if(i)
1510 LEAVE;
1511#endif
1512 if(to_dec)
1513 SvREFCNT_dec(to_dec);
79072805
LW
1514 return 0;
1515}
64ca3a65 1516#endif /* !PERL_MICRO */
79072805
LW
1517
1518int
864dbfa3 1519Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1520{
97aff369 1521 dVAR;
08aeb9f7 1522 HV* stash;
8772537c 1523 PERL_UNUSED_ARG(sv);
e1a479c5 1524
08aeb9f7
BB
1525 /* Bail out if destruction is going on */
1526 if(PL_dirty) return 0;
1527
89c14e2e
BB
1528 /* Skip _isaelem because _isa will handle it shortly */
1529 if (PL_delaymagic & DM_ARRAY && mg->mg_type == PERL_MAGIC_isaelem)
1530 return 0;
1531
70cd14a1
CB
1532 /* XXX Once it's possible, we need to
1533 detect that our @ISA is aliased in
1534 other stashes, and act on the stashes
1535 of all of the aliases */
1536
e1a479c5
BB
1537 /* The first case occurs via setisa,
1538 the second via setisa_elem, which
1539 calls this same magic */
08aeb9f7
BB
1540 stash = GvSTASH(
1541 SvTYPE(mg->mg_obj) == SVt_PVGV
1542 ? (GV*)mg->mg_obj
1543 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
e1a479c5
BB
1544 );
1545
89c14e2e 1546 mro_isa_changed_in(stash);
08aeb9f7 1547
463ee0b2
LW
1548 return 0;
1549}
1550
1551int
864dbfa3 1552Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1553{
97aff369 1554 dVAR;
8772537c
AL
1555 PERL_UNUSED_ARG(sv);
1556 PERL_UNUSED_ARG(mg);
3280af22 1557 PL_amagic_generation++;
463ee0b2 1558
a0d0e21e
LW
1559 return 0;
1560}
463ee0b2 1561
946ec16e 1562int
864dbfa3 1563Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1564{
dd374669 1565 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1566 I32 i = 0;
8772537c 1567 PERL_UNUSED_ARG(mg);
7719e241 1568
6ff81951 1569 if (hv) {
497b47a8
JH
1570 (void) hv_iterinit(hv);
1571 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1572 i = HvKEYS(hv);
1573 else {
1574 while (hv_iternext(hv))
1575 i++;
1576 }
6ff81951
GS
1577 }
1578
1579 sv_setiv(sv, (IV)i);
1580 return 0;
1581}
1582
1583int
864dbfa3 1584Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1585{
8772537c 1586 PERL_UNUSED_ARG(mg);
946ec16e
PP
1587 if (LvTARG(sv)) {
1588 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1589 }
1590 return 0;
ac27b0f5 1591}
946ec16e 1592
e336de0d 1593/* caller is responsible for stack switching/cleanup */
565764a8 1594STATIC int
e1ec3a88 1595S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1596{
97aff369 1597 dVAR;
a0d0e21e 1598 dSP;
463ee0b2 1599
924508f0
GS
1600 PUSHMARK(SP);
1601 EXTEND(SP, n);
33c27489 1602 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1603 if (n > 1) {
93965878 1604 if (mg->mg_ptr) {
565764a8 1605 if (mg->mg_len >= 0)
79cb57f6 1606 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1607 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1608 PUSHs((SV*)mg->mg_ptr);
1609 }
14befaf4 1610 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1611 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1612 }
1613 }
1614 if (n > 2) {
1615 PUSHs(val);
88e89b8a 1616 }
463ee0b2
LW
1617 PUTBACK;
1618
864dbfa3 1619 return call_method(meth, flags);
946ec16e
PP
1620}
1621
76e3520e 1622STATIC int
e1ec3a88 1623S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1624{
27da23d5 1625 dVAR; dSP;
463ee0b2 1626
a0d0e21e
LW
1627 ENTER;
1628 SAVETMPS;
e788e7d3 1629 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1630
33c27489 1631 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1632 sv_setsv(sv, *PL_stack_sp--);
93965878 1633 }
463ee0b2 1634
d3acc0f7 1635 POPSTACK;
a0d0e21e
LW
1636 FREETMPS;
1637 LEAVE;
1638 return 0;
1639}
463ee0b2 1640
a0d0e21e 1641int
864dbfa3 1642Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1643{
a0d0e21e
LW
1644 if (mg->mg_ptr)
1645 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1646 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1647 return 0;
1648}
1649
1650int
864dbfa3 1651Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1652{
27da23d5 1653 dVAR; dSP;
a60c0954 1654 ENTER;
e788e7d3 1655 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1656 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1657 POPSTACK;
a60c0954 1658 LEAVE;
463ee0b2
LW
1659 return 0;
1660}
1661
1662int
864dbfa3 1663Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1664{
a0d0e21e
LW
1665 return magic_methpack(sv,mg,"DELETE");
1666}
463ee0b2 1667
93965878
NIS
1668
1669U32
864dbfa3 1670Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1671{
27da23d5 1672 dVAR; dSP;
22846ab4 1673 I32 retval = 0;
93965878
NIS
1674
1675 ENTER;
1676 SAVETMPS;
e788e7d3 1677 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1678 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1679 sv = *PL_stack_sp--;
22846ab4
AB
1680 retval = SvIV(sv)-1;
1681 if (retval < -1)
1682 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1683 }
d3acc0f7 1684 POPSTACK;
93965878
NIS
1685 FREETMPS;
1686 LEAVE;
22846ab4 1687 return (U32) retval;
93965878
NIS
1688}
1689
cea2e8a9
GS
1690int
1691Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1692{
27da23d5 1693 dVAR; dSP;
463ee0b2 1694
e336de0d 1695 ENTER;
e788e7d3 1696 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1697 PUSHMARK(SP);
33c27489 1698 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1699 PUTBACK;
864dbfa3 1700 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1701 POPSTACK;
a60c0954 1702 LEAVE;
a3bcc51e 1703
463ee0b2
LW
1704 return 0;
1705}
1706
1707int
864dbfa3 1708Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1709{
27da23d5 1710 dVAR; dSP;
666ea192 1711 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1712
1713 ENTER;
a0d0e21e 1714 SAVETMPS;
e788e7d3 1715 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1716 PUSHMARK(SP);
1717 EXTEND(SP, 2);
33c27489 1718 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1719 if (SvOK(key))
1720 PUSHs(key);
1721 PUTBACK;
1722
864dbfa3 1723 if (call_method(meth, G_SCALAR))
3280af22 1724 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1725
d3acc0f7 1726 POPSTACK;
a0d0e21e
LW
1727 FREETMPS;
1728 LEAVE;
79072805
LW
1729 return 0;
1730}
1731
1732int
1146e912 1733Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1734{
1735 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1736}
a0d0e21e 1737
a3bcc51e
TP
1738SV *
1739Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1740{
27da23d5 1741 dVAR; dSP;
5fcbf73d 1742 SV *retval;
8772537c
AL
1743 SV * const tied = SvTIED_obj((SV*)hv, mg);
1744 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1745
1746 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1747 SV *key;
bfcb3514 1748 if (HvEITER_get(hv))
a3bcc51e
TP
1749 /* we are in an iteration so the hash cannot be empty */
1750 return &PL_sv_yes;
1751 /* no xhv_eiter so now use FIRSTKEY */
1752 key = sv_newmortal();
1753 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1754 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1755 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1756 }
1757
1758 /* there is a SCALAR method that we can call */
1759 ENTER;
1760 PUSHSTACKi(PERLSI_MAGIC);
1761 PUSHMARK(SP);
1762 EXTEND(SP, 1);
1763 PUSHs(tied);
1764 PUTBACK;
1765
1766 if (call_method("SCALAR", G_SCALAR))
1767 retval = *PL_stack_sp--;
5fcbf73d
AL
1768 else
1769 retval = &PL_sv_undef;
a3bcc51e
TP
1770 POPSTACK;
1771 LEAVE;
1772 return retval;
1773}
1774
a0d0e21e 1775int
864dbfa3 1776Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1777{
97aff369 1778 dVAR;
8772537c
AL
1779 GV * const gv = PL_DBline;
1780 const I32 i = SvTRUE(sv);
1781 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1782 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1783 if (svp && SvIOKp(*svp)) {
1784 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1785 if (o) {
1786 /* set or clear breakpoint in the relevant control op */
1787 if (i)
1788 o->op_flags |= OPf_SPECIAL;
1789 else
1790 o->op_flags &= ~OPf_SPECIAL;
1791 }
5df8de69 1792 }
79072805
LW
1793 return 0;
1794}
1795
1796int
8772537c 1797Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1798{
97aff369 1799 dVAR;
8772537c 1800 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1801 if (obj) {
fc15ae8f 1802 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1803 } else {
1804 SvOK_off(sv);
1805 }
79072805
LW
1806 return 0;
1807}
1808
1809int
864dbfa3 1810Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1811{
97aff369 1812 dVAR;
8772537c 1813 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1814 if (obj) {
fc15ae8f 1815 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1816 } else {
1817 if (ckWARN(WARN_MISC))
1818 Perl_warner(aTHX_ packWARN(WARN_MISC),
1819 "Attempt to set length of freed array");
1820 }
1821 return 0;
1822}
1823
1824int
1825Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1826{
97aff369 1827 dVAR;
53c1dcc0 1828 PERL_UNUSED_ARG(sv);
94f3782b
DM
1829 /* during global destruction, mg_obj may already have been freed */
1830 if (PL_in_clean_all)
1ea47f64 1831 return 0;
94f3782b 1832
83bf042f
NC
1833 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1834
1835 if (mg) {
1836 /* arylen scalar holds a pointer back to the array, but doesn't own a
1837 reference. Hence the we (the array) are about to go away with it
1838 still pointing at us. Clear its pointer, else it would be pointing
1839 at free memory. See the comment in sv_magic about reference loops,
1840 and why it can't own a reference to us. */
1841 mg->mg_obj = 0;
1842 }
a0d0e21e
LW
1843 return 0;
1844}
1845
1846int
864dbfa3 1847Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1848{
97aff369 1849 dVAR;
8772537c 1850 SV* const lsv = LvTARG(sv);
3881461a 1851 PERL_UNUSED_ARG(mg);
ac27b0f5 1852
a0d0e21e 1853 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1854 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1855 if (found && found->mg_len >= 0) {
1856 I32 i = found->mg_len;
7e2040f0 1857 if (DO_UTF8(lsv))
a0ed51b3 1858 sv_pos_b2u(lsv, &i);
fc15ae8f 1859 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1860 return 0;
1861 }
1862 }
0c34ef67 1863 SvOK_off(sv);
a0d0e21e
LW
1864 return 0;
1865}
1866
1867int
864dbfa3 1868Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1869{
97aff369 1870 dVAR;
8772537c 1871 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1872 SSize_t pos;
1873 STRLEN len;
c00206c8 1874 STRLEN ulen = 0;
53d44271 1875 MAGIC* found;
a0d0e21e 1876
3881461a 1877 PERL_UNUSED_ARG(mg);
ac27b0f5 1878
a0d0e21e 1879 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1880 found = mg_find(lsv, PERL_MAGIC_regex_global);
1881 else
1882 found = NULL;
1883 if (!found) {
a0d0e21e
LW
1884 if (!SvOK(sv))
1885 return 0;
d83f0a82
NC
1886#ifdef PERL_OLD_COPY_ON_WRITE
1887 if (SvIsCOW(lsv))
1888 sv_force_normal_flags(lsv, 0);
1889#endif
3881461a 1890 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1891 NULL, 0);
a0d0e21e
LW
1892 }
1893 else if (!SvOK(sv)) {
3881461a 1894 found->mg_len = -1;
a0d0e21e
LW
1895 return 0;
1896 }
1897 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1898
fc15ae8f 1899 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1900
7e2040f0 1901 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1902 ulen = sv_len_utf8(lsv);
1903 if (ulen)
1904 len = ulen;
a0ed51b3
LW
1905 }
1906
a0d0e21e
LW
1907 if (pos < 0) {
1908 pos += len;
1909 if (pos < 0)
1910 pos = 0;
1911 }
eb160463 1912 else if (pos > (SSize_t)len)
a0d0e21e 1913 pos = len;
a0ed51b3
LW
1914
1915 if (ulen) {
1916 I32 p = pos;
1917 sv_pos_u2b(lsv, &p, 0);
1918 pos = p;
1919 }
727405f8 1920
3881461a
AL
1921 found->mg_len = pos;
1922 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1923
79072805
LW
1924 return 0;
1925}
1926
1927int
864dbfa3 1928Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1929{
79072805 1930 GV* gv;
8772537c
AL
1931 PERL_UNUSED_ARG(mg);
1932
dd69841b
BB
1933 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1934
79072805
LW
1935 if (!SvOK(sv))
1936 return 0;
2e5b91de 1937 if (isGV_with_GP(sv)) {
180488f8
NC
1938 /* We're actually already a typeglob, so don't need the stuff below.
1939 */
1940 return 0;
1941 }
f776e3cd 1942 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1943 if (sv == (SV*)gv)
1944 return 0;
1945 if (GvGP(sv))
88e89b8a 1946 gp_free((GV*)sv);
79072805 1947 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1948 return 0;
1949}
1950
1951int
864dbfa3 1952Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1953{
1954 STRLEN len;
35a4481c 1955 SV * const lsv = LvTARG(sv);
b83604b4 1956 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1957 I32 offs = LvTARGOFF(sv);
1958 I32 rem = LvTARGLEN(sv);
8772537c 1959 PERL_UNUSED_ARG(mg);
6ff81951 1960
9aa983d2
JH
1961 if (SvUTF8(lsv))
1962 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1963 if (offs > (I32)len)
6ff81951 1964 offs = len;
eb160463 1965 if (rem + offs > (I32)len)
6ff81951
GS
1966 rem = len - offs;
1967 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1968 if (SvUTF8(lsv))
2ef4b674 1969 SvUTF8_on(sv);
6ff81951
GS
1970 return 0;
1971}
1972
1973int
864dbfa3 1974Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1975{
97aff369 1976 dVAR;
9aa983d2 1977 STRLEN len;
5fcbf73d 1978 const char * const tmps = SvPV_const(sv, len);
dd374669 1979 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1980 I32 lvoff = LvTARGOFF(sv);
1981 I32 lvlen = LvTARGLEN(sv);
8772537c 1982 PERL_UNUSED_ARG(mg);
075a4a2b 1983
1aa99e6b 1984 if (DO_UTF8(sv)) {
9aa983d2
JH
1985 sv_utf8_upgrade(lsv);
1986 sv_pos_u2b(lsv, &lvoff, &lvlen);
1987 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1988 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1989 SvUTF8_on(lsv);
1990 }
9bf12eaf 1991 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1992 const char *utf8;
9aa983d2 1993 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1994 LvTARGLEN(sv) = len;
5fcbf73d
AL
1995 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1996 sv_insert(lsv, lvoff, lvlen, utf8, len);
1997 Safefree(utf8);
1aa99e6b 1998 }
b76f3ce2
GB
1999 else {
2000 sv_insert(lsv, lvoff, lvlen, tmps, len);
2001 LvTARGLEN(sv) = len;
2002 }
2003
1aa99e6b 2004
79072805
LW
2005 return 0;
2006}
2007
2008int
864dbfa3 2009Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2010{
97aff369 2011 dVAR;
8772537c 2012 PERL_UNUSED_ARG(sv);
27cc343c 2013 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2014 return 0;
2015}
2016
2017int
864dbfa3 2018Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2019{
97aff369 2020 dVAR;
8772537c 2021 PERL_UNUSED_ARG(sv);
b01e650a
DM
2022 /* update taint status */
2023 if (PL_tainted)
2024 mg->mg_len |= 1;
2025 else
2026 mg->mg_len &= ~1;
463ee0b2
LW
2027 return 0;
2028}
2029
2030int
864dbfa3 2031Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2032{
35a4481c 2033 SV * const lsv = LvTARG(sv);
8772537c 2034 PERL_UNUSED_ARG(mg);
6ff81951 2035
6136c704
AL
2036 if (lsv)
2037 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2038 else
0c34ef67 2039 SvOK_off(sv);
6ff81951 2040
6ff81951
GS
2041 return 0;
2042}
2043
2044int
864dbfa3 2045Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2046{
8772537c 2047 PERL_UNUSED_ARG(mg);
79072805
LW
2048 do_vecset(sv); /* XXX slurp this routine */
2049 return 0;
2050}
2051
2052int
864dbfa3 2053Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2054{
97aff369 2055 dVAR;
a0714e2c 2056 SV *targ = NULL;
5f05dabc 2057 if (LvTARGLEN(sv)) {
68dc0745 2058 if (mg->mg_obj) {
8772537c
AL
2059 SV * const ahv = LvTARG(sv);
2060 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2061 if (he)
2062 targ = HeVAL(he);
68dc0745
PP
2063 }
2064 else {
8772537c 2065 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2066 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2067 targ = AvARRAY(av)[LvTARGOFF(sv)];
2068 }
46da273f 2069 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2070 /* somebody else defined it for us */
2071 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2072 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2073 LvTARGLEN(sv) = 0;
2074 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2075 mg->mg_obj = NULL;
68dc0745
PP
2076 mg->mg_flags &= ~MGf_REFCOUNTED;
2077 }
5f05dabc 2078 }
71be2cbc
PP
2079 else
2080 targ = LvTARG(sv);
3280af22 2081 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2082 return 0;
2083}
2084
2085int
864dbfa3 2086Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2087{
8772537c 2088 PERL_UNUSED_ARG(mg);
71be2cbc 2089 if (LvTARGLEN(sv))
68dc0745
PP
2090 vivify_defelem(sv);
2091 if (LvTARG(sv)) {
5f05dabc 2092 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2093 SvSETMAGIC(LvTARG(sv));
2094 }
5f05dabc
PP
2095 return 0;
2096}
2097
71be2cbc 2098void
864dbfa3 2099Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2100{
97aff369 2101 dVAR;
74e13ce4 2102 MAGIC *mg;
a0714e2c 2103 SV *value = NULL;
71be2cbc 2104
14befaf4 2105 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2106 return;
68dc0745 2107 if (mg->mg_obj) {
8772537c
AL
2108 SV * const ahv = LvTARG(sv);
2109 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2110 if (he)
2111 value = HeVAL(he);
3280af22 2112 if (!value || value == &PL_sv_undef)
be2597df 2113 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2114 }
68dc0745 2115 else {
8772537c 2116 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2117 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2118 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2119 else {
d4c19fe8 2120 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2121 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2122 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2123 }
2124 }
b37c2d43 2125 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2126 SvREFCNT_dec(LvTARG(sv));
2127 LvTARG(sv) = value;
71be2cbc 2128 LvTARGLEN(sv) = 0;
68dc0745 2129 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2130 mg->mg_obj = NULL;
68dc0745 2131 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2132}
2133
2134int
864dbfa3 2135Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2136{
86f55936 2137 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2138}
2139
2140int
864dbfa3 2141Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2142{
96a5add6 2143 PERL_UNUSED_CONTEXT;
565764a8 2144 mg->mg_len = -1;
c6496cc7 2145 SvSCREAM_off(sv);
93a17b20
LW
2146 return 0;
2147}
2148
2149int
864dbfa3 2150Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2151{
8772537c 2152 PERL_UNUSED_ARG(mg);
14befaf4 2153 sv_unmagic(sv, PERL_MAGIC_bm);
b84d1fce 2154 SvTAIL_off(sv);
79072805
LW
2155 SvVALID_off(sv);
2156 return 0;
2157}
2158
2159int
864dbfa3 2160Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2161{
8772537c 2162 PERL_UNUSED_ARG(mg);
14befaf4 2163 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2164 SvCOMPILED_off(sv);
2165 return 0;
2166}
2167
2168int
864dbfa3 2169Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2170{
35a4481c 2171 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2172
2173 if (uf && uf->uf_set)
24f81a43 2174 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2175 return 0;
2176}
2177
c277df42 2178int
faf82a0b
AE
2179Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2180{
8772537c 2181 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2182 sv_unmagic(sv, PERL_MAGIC_qr);
2183 return 0;
2184}
2185
2186int
864dbfa3 2187Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2188{
97aff369 2189 dVAR;
8772537c
AL
2190 regexp * const re = (regexp *)mg->mg_obj;
2191 PERL_UNUSED_ARG(sv);
2192
c277df42
IZ
2193 ReREFCNT_dec(re);
2194 return 0;
2195}
2196
7a4c00b4 2197#ifdef USE_LOCALE_COLLATE
79072805 2198int
864dbfa3 2199Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2200{
2201 /*
838b5b74 2202 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2203 * and vanished with a faint plop.
2204 */
96a5add6 2205 PERL_UNUSED_CONTEXT;
8772537c 2206 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2207 if (mg->mg_ptr) {
2208 Safefree(mg->mg_ptr);
2209 mg->mg_ptr = NULL;
565764a8 2210 mg->mg_len = -1;
7a4c00b4 2211 }
bbce6d69
PP
2212 return 0;
2213}
7a4c00b4 2214#endif /* USE_LOCALE_COLLATE */
bbce6d69 2215
7e8c5dac
HS
2216/* Just clear the UTF-8 cache data. */
2217int
2218Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2219{
96a5add6 2220 PERL_UNUSED_CONTEXT;
8772537c 2221 PERL_UNUSED_ARG(sv);
7e8c5dac 2222 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2223 mg->mg_ptr = NULL;
7e8c5dac
HS
2224 mg->mg_len = -1; /* The mg_len holds the len cache. */
2225 return 0;
2226}
2227
bbce6d69 2228int
864dbfa3 2229Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2230{
97aff369 2231 dVAR;
e1ec3a88 2232 register const char *s;
2fdbfb4d
AB
2233 register I32 paren;
2234 register const REGEXP * rx;
2235 const char * const remaining = mg->mg_ptr + 1;
79072805 2236 I32 i;
8990e307 2237 STRLEN len;
2fdbfb4d 2238
79072805 2239 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2240 case '\015': /* $^MATCH */
2241 if (strEQ(remaining, "ATCH"))
2242 goto do_match;
2243 case '`': /* ${^PREMATCH} caught below */
2244 do_prematch:
f1b875a0 2245 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2246 goto setparen;
2247 case '\'': /* ${^POSTMATCH} caught below */
2248 do_postmatch:
f1b875a0 2249 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2250 goto setparen;
2251 case '&':
2252 do_match:
f1b875a0 2253 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2254 goto setparen;
2255 case '1': case '2': case '3': case '4':
2256 case '5': case '6': case '7': case '8': case '9':
104a8018 2257 paren = atoi(mg->mg_ptr);
2fdbfb4d 2258 setparen:
1e05feb3 2259 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
2260 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2261 break;
1e05feb3 2262 } else {
2fdbfb4d
AB
2263 /* Croak with a READONLY error when a numbered match var is
2264 * set without a previous pattern match. Unless it's C<local $1>
2265 */
2266 if (!PL_localizing) {
2267 Perl_croak(aTHX_ PL_no_modify);
2268 }
2269 }
748a9306 2270 case '\001': /* ^A */
3280af22 2271 sv_setsv(PL_bodytarget, sv);
748a9306 2272 break;
49460fe6 2273 case '\003': /* ^C */
38ab35f8 2274 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2275 break;
2276
79072805 2277 case '\004': /* ^D */
b4ab917c 2278#ifdef DEBUGGING
b83604b4 2279 s = SvPV_nolen_const(sv);
ddcf8bc1 2280 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2281 DEBUG_x(dump_all());
b4ab917c 2282#else
38ab35f8 2283 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2284#endif
79072805 2285 break;
28f23441 2286 case '\005': /* ^E */
d0063567 2287 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2288#ifdef MACOS_TRADITIONAL
38ab35f8 2289 gMacPerl_OSErr = SvIV(sv);
28f23441 2290#else
cd39f2b6 2291# ifdef VMS
38ab35f8 2292 set_vaxc_errno(SvIV(sv));
048c1ddf 2293# else
cd39f2b6 2294# ifdef WIN32
d0063567 2295 SetLastError( SvIV(sv) );
cd39f2b6 2296# else
9fed8b87 2297# ifdef OS2
38ab35f8 2298 os2_setsyserrno(SvIV(sv));
9fed8b87 2299# else
d0063567 2300 /* will anyone ever use this? */
38ab35f8 2301 SETERRNO(SvIV(sv), 4);
cd39f2b6 2302# endif
048c1ddf
IZ
2303# endif
2304# endif
22fae026 2305#endif
d0063567
DK
2306 }
2307 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2308 if (PL_encoding)
2309 SvREFCNT_dec(PL_encoding);
2310 if (SvOK(sv) || SvGMAGICAL(sv)) {
2311 PL_encoding = newSVsv(sv);
2312 }
2313 else {
a0714e2c 2314 PL_encoding = NULL;
d0063567
DK
2315 }
2316 }
2317 break;
79072805 2318 case '\006': /* ^F */
38ab35f8 2319 PL_maxsysfd = SvIV(sv);
79072805 2320 break;
a0d0e21e 2321 case '\010': /* ^H */
38ab35f8 2322 PL_hints = SvIV(sv);
a0d0e21e 2323 break;
9d116dd7 2324 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2325 Safefree(PL_inplace);
bd61b366 2326 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2327 break;
28f23441 2328 case '\017': /* ^O */
ac27b0f5 2329 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2330 Safefree(PL_osname);
bd61b366 2331 PL_osname = NULL;
3511154c
DM
2332 if (SvOK(sv)) {
2333 TAINT_PROPER("assigning to $^O");
2e0de35c 2334 PL_osname = savesvpv(sv);
3511154c 2335 }
ac27b0f5
NIS
2336 }
2337 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2338 STRLEN len;
2339 const char *const start = SvPV(sv, len);
b54fc2b6 2340 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2341 SV *tmp;
2342 struct refcounted_he *tmp_he;
2343
2344
2345 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2346 PL_hints
2347 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2348
2349 /* Opening for input is more common than opening for output, so
2350 ensure that hints for input are sooner on linked list. */
2351 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2352 : newSVpvs(""));
2353 SvFLAGS(tmp) |= SvUTF8(sv);
2354
2355 tmp_he
2356 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2357 sv_2mortal(newSVpvs("open>")), tmp);
2358
2359 /* The UTF-8 setting is carried over */
2360 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2361
11bcd5da 2362 PL_compiling.cop_hints_hash
8b850bd5
NC
2363 = Perl_refcounted_he_new(aTHX_ tmp_he,
2364 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2365 }
28f23441 2366 break;
79072805 2367 case '\020': /* ^P */
2fdbfb4d
AB
2368 if (*remaining == '\0') { /* ^P */
2369 PL_perldb = SvIV(sv);
2370 if (PL_perldb && !PL_DBsingle)
2371 init_debugger();
2372 break;
2373 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2374 goto do_prematch;
2375 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2376 goto do_postmatch;
2377 }
79072805 2378 case '\024': /* ^T */
88e89b8a 2379#ifdef BIG_TIME
6b88bc9c 2380 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2381#else
38ab35f8 2382 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2383#endif
79072805 2384 break;
e07ea26a
NC
2385 case '\025': /* ^UTF8CACHE */
2386 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2387 PL_utf8cache = (signed char) sv_2iv(sv);
2388 }
2389 break;
fde18df1 2390 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2391 if (*(mg->mg_ptr+1) == '\0') {
2392 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2393 i = SvIV(sv);
ac27b0f5 2394 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2395 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2396 }
599cee73 2397 }
0a378802 2398 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2399 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2400 if (!SvPOK(sv) && PL_localizing) {
2401 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2402 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2403 break;
2404 }
f4fc7782 2405 {
b5477537 2406 STRLEN len, i;
d3a7d8c7 2407 int accumulate = 0 ;
f4fc7782 2408 int any_fatals = 0 ;
b83604b4 2409 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2410 for (i = 0 ; i < len ; ++i) {
2411 accumulate |= ptr[i] ;
2412 any_fatals |= (ptr[i] & 0xAA) ;
2413 }
4243c432
NC
2414 if (!accumulate) {
2415 if (!specialWARN(PL_compiling.cop_warnings))
2416 PerlMemShared_free(PL_compiling.cop_warnings);
2417 PL_compiling.cop_warnings = pWARN_NONE;
2418 }
72dc9ed5
NC
2419 /* Yuck. I can't see how to abstract this: */
2420 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2421 WARN_ALL) && !any_fatals) {
4243c432
NC
2422 if (!specialWARN(PL_compiling.cop_warnings))
2423 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2424 PL_compiling.cop_warnings = pWARN_ALL;
2425 PL_dowarn |= G_WARN_ONCE ;
727405f8 2426 }
d3a7d8c7 2427 else {
72dc9ed5
NC
2428 STRLEN len;
2429 const char *const p = SvPV_const(sv, len);
2430
2431 PL_compiling.cop_warnings
8ee4cf24 2432 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2433 p, len);
2434
d3a7d8c7
GS
2435 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2436 PL_dowarn |= G_WARN_ONCE ;
2437 }
f4fc7782 2438
d3a7d8c7 2439 }
4438c4b7 2440 }
971a9dd3 2441 }
79072805
LW
2442 break;
2443 case '.':
3280af22
NIS
2444 if (PL_localizing) {
2445 if (PL_localizing == 1)
7766f137 2446 SAVESPTR(PL_last_in_gv);
748a9306 2447 }
3280af22 2448 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2449 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2450 break;
2451 case '^':
3280af22 2452 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2453 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2454 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2455 break;
2456 case '~':
3280af22 2457 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2458 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2459 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2460 break;
2461 case '=':
38ab35f8 2462 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2463 break;
2464 case '-':
38ab35f8 2465 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2466 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2467 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2468 break;
2469 case '%':
38ab35f8 2470 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2471 break;
2472 case '|':
4b65379b 2473 {
8772537c 2474 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2475 if(!io)
2476 break;
38ab35f8 2477 if ((SvIV(sv)) == 0)
4b65379b
CS
2478 IoFLAGS(io) &= ~IOf_FLUSH;
2479 else {
2480 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2481 PerlIO *ofp = IoOFP(io);
2482 if (ofp)
2483 (void)PerlIO_flush(ofp);
2484 IoFLAGS(io) |= IOf_FLUSH;
2485 }
2486 }
79072805
LW
2487 }
2488 break;
79072805 2489 case '/':
3280af22 2490 SvREFCNT_dec(PL_rs);
8bfdd7d9 2491 PL_rs = newSVsv(sv);
79072805
LW
2492 break;
2493 case '\\':
7889fe52
NIS
2494 if (PL_ors_sv)
2495 SvREFCNT_dec(PL_ors_sv);
009c130f 2496 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2497 PL_ors_sv = newSVsv(sv);
009c130f 2498 }
e3c19b7b 2499 else {
a0714e2c 2500 PL_ors_sv = NULL;
e3c19b7b 2501 }
79072805
LW
2502 break;
2503 case ',':
7889fe52
NIS
2504 if (PL_ofs_sv)
2505 SvREFCNT_dec(PL_ofs_sv);
2506 if (SvOK(sv) || SvGMAGICAL(sv)) {
2507 PL_ofs_sv = newSVsv(sv);
2508 }
2509 else {
a0714e2c 2510 PL_ofs_sv = NULL;
7889fe52 2511 }
79072805 2512 break;
79072805 2513 case '[':
38ab35f8 2514 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2515 break;
2516 case '?':
ff0cee69 2517#ifdef COMPLEX_STATUS
6b88bc9c
GS
2518 if (PL_localizing == 2) {
2519 PL_statusvalue = LvTARGOFF(sv);
2520 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2521 }
2522 else
2523#endif
2524#ifdef VMSISH_STATUS
2525 if (VMSISH_STATUS)
fb38d079 2526 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2527 else
2528#endif
38ab35f8 2529 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2530 break;
2531 case '!':
93189314
JH
2532 {
2533#ifdef VMS
2534# define PERL_VMS_BANG vaxc$errno
2535#else
2536# define PERL_VMS_BANG 0
2537#endif
91487cfc 2538 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2539 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2540 }
79072805
LW
2541 break;
2542 case '<':
38ab35f8 2543 PL_uid = SvIV(sv);
3280af22
NIS
2544 if (PL_delaymagic) {
2545 PL_delaymagic |= DM_RUID;
79072805
LW
2546 break; /* don't do magic till later */
2547 }
2548#ifdef HAS_SETRUID
b28d0864 2549 (void)setruid((Uid_t)PL_uid);
79072805
LW
2550#else
2551#ifdef HAS_SETREUID
3280af22 2552 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2553#else
85e6fe83 2554#ifdef HAS_SETRESUID
b28d0864 2555 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2556#else
75870ed3 2557 if (PL_uid == PL_euid) { /* special case $< = $> */
2558#ifdef PERL_DARWIN
2559 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2560 if (PL_uid != 0 && PerlProc_getuid() == 0)
2561 (void)PerlProc_setuid(0);
2562#endif
b28d0864 2563 (void)PerlProc_setuid(PL_uid);
75870ed3 2564 } else {
d8eceb89 2565 PL_uid = PerlProc_getuid();
cea2e8a9 2566 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2567 }
79072805
LW
2568#endif
2569#endif
85e6fe83 2570#endif
d8eceb89 2571 PL_uid = PerlProc_getuid();
3280af22 2572 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2573 break;
2574 case '>':
38ab35f8 2575 PL_euid = SvIV(sv);
3280af22
NIS
2576 if (PL_delaymagic) {
2577 PL_delaymagic |= DM_EUID;
79072805
LW
2578 break; /* don't do magic till later */
2579 }
2580#ifdef HAS_SETEUID
3280af22 2581 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2582#else
2583#ifdef HAS_SETREUID
b28d0864 2584 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2585#else
2586#ifdef HAS_SETRESUID
6b88bc9c 2587 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2588#else
b28d0864
NIS
2589 if (PL_euid == PL_uid) /* special case $> = $< */
2590 PerlProc_setuid(PL_euid);
a0d0e21e 2591 else {
e8ee3774 2592 PL_euid = PerlProc_geteuid();
cea2e8a9 2593 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2594 }
79072805
LW
2595#endif
2596#endif
85e6fe83 2597#endif
d8eceb89 2598 PL_euid = PerlProc_geteuid();
3280af22 2599 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2600 break;
2601 case '(':
38ab35f8 2602 PL_gid = SvIV(sv);
3280af22
NIS
2603 if (PL_delaymagic) {
2604 PL_delaymagic |= DM_RGID;
79072805
LW
2605 break; /* don't do magic till later */
2606 }
2607#ifdef HAS_SETRGID
b28d0864 2608 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2609#else
2610#ifdef HAS_SETREGID
3280af22 2611 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2612#else
2613#ifdef HAS_SETRESGID
b28d0864 2614 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2615#else
b28d0864
NIS
2616 if (PL_gid == PL_egid) /* special case $( = $) */
2617 (void)PerlProc_setgid(PL_gid);
748a9306 2618 else {
d8eceb89 2619 PL_gid = PerlProc_getgid();
cea2e8a9 2620 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2621 }
79072805
LW
2622#endif
2623#endif
85e6fe83 2624#endif
d8eceb89 2625 PL_gid = PerlProc_getgid();
3280af22 2626 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2627 break;
2628 case ')':
5cd24f17
PP
2629#ifdef HAS_SETGROUPS
2630 {
b83604b4 2631 const char *p = SvPV_const(sv, len);
757f63d8
SP
2632 Groups_t *gary = NULL;
2633
2634 while (isSPACE(*p))
2635 ++p;
2636 PL_egid = Atol(p);
2637 for (i = 0; i < NGROUPS; ++i) {
2638 while (*p && !isSPACE(*p))
2639 ++p;
2640 while (isSPACE(*p))
2641 ++p;
2642 if (!*p)
2643 break;
2644 if(!gary)
2645 Newx(gary, i + 1, Groups_t);
2646 else
2647 Renew(gary, i + 1, Groups_t);
2648 gary[i] = Atol(p);
2649 }
2650 if (i)
2651 (void)setgroups(i, gary);
f5a63d97 2652 Safefree(gary);
5cd24f17
PP
2653 }
2654#else /* HAS_SETGROUPS */
38ab35f8 2655 PL_egid = SvIV(sv);
5cd24f17 2656#endif /* HAS_SETGROUPS */
3280af22
NIS
2657 if (PL_delaymagic) {
2658 PL_delaymagic |= DM_EGID;
79072805
LW
2659 break; /* don't do magic till later */
2660 }
2661#ifdef HAS_SETEGID
3280af22 2662 (void)setegid((Gid_t)PL_egid);
79072805
LW
2663#else
2664#ifdef HAS_SETREGID
b28d0864 2665 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2666#else
2667#ifdef HAS_SETRESGID
b28d0864 2668 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2669#else
b28d0864
NIS
2670 if (PL_egid == PL_gid) /* special case $) = $( */
2671 (void)PerlProc_setgid(PL_egid);
748a9306 2672 else {
d8eceb89 2673 PL_egid = PerlProc_getegid();
cea2e8a9 2674 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2675 }
79072805
LW
2676#endif
2677#endif
85e6fe83 2678#endif
d8eceb89 2679 PL_egid = PerlProc_getegid();
3280af22 2680 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2681 break;
2682 case ':':
2d8e6c8d 2683 PL_chopset = SvPV_force(sv,len);
79072805 2684 break;
cd39f2b6 2685#ifndef MACOS_TRADITIONAL
79072805 2686 case '0':
e2975953 2687 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2688#ifdef HAS_SETPROCTITLE
2689 /* The BSDs don't show the argv[] in ps(1) output, they
2690 * show a string from the process struct and provide
2691 * the setproctitle() routine to manipulate that. */
a2722ac9 2692 if (PL_origalen != 1) {
b83604b4 2693 s = SvPV_const(sv, len);
98b76f99 2694# if __FreeBSD_version > 410001
9aad2c0e 2695 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2696 * but not the "(perl) suffix from the ps(1)
2697 * output, because that's what ps(1) shows if the
2698 * argv[] is modified. */
6f2ad931 2699 setproctitle("-%s", s);
9aad2c0e 2700# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2701 /* This doesn't really work if you assume that
2702 * $0 = 'foobar'; will wipe out 'perl' from the $0
2703 * because in ps(1) output the result will be like
2704 * sprintf("perl: %s (perl)", s)
2705 * I guess this is a security feature:
2706 * one (a user process) cannot get rid of the original name.
2707 * --jhi */
2708 setproctitle("%s", s);
2709# endif
2710 }
9d3968b2 2711#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2712 if (PL_origalen != 1) {
17aa7f3d 2713 union pstun un;
b83604b4 2714 s = SvPV_const(sv, len);
6867be6d 2715 un.pst_command = (char *)s;
17aa7f3d
JH
2716 pstat(PSTAT_SETCMD, un, len, 0, 0);
2717 }
9d3968b2 2718#else
2d2af554
GA
2719 if (PL_origalen > 1) {
2720 /* PL_origalen is set in perl_parse(). */
2721 s = SvPV_force(sv,len);
2722 if (len >= (STRLEN)PL_origalen-1) {
2723 /* Longer than original, will be truncated. We assume that
2724 * PL_origalen bytes are available. */
2725 Copy(s, PL_origargv[0], PL_origalen-1, char);
2726 }
2727 else {
2728 /* Shorter than original, will be padded. */
235ac35d 2729#ifdef PERL_DARWIN
60777a0d
JH
2730 /* Special case for Mac OS X: see [perl #38868] */
2731 const int pad = 0;
235ac35d 2732#else
8a89a4f1
MB
2733 /* Is the space counterintuitive? Yes.
2734 * (You were expecting \0?)
2735 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2736 * --jhi */
60777a0d 2737 const int pad = ' ';
235ac35d 2738#endif
60777a0d
JH
2739 Copy(s, PL_origargv[0], len, char);
2740 PL_origargv[0][len] = 0;
2741 memset(PL_origargv[0] + len + 1,
2742 pad, PL_origalen - len - 1);
2d2af554
GA
2743 }
2744 PL_origargv[0][PL_origalen-1] = 0;
2745 for (i = 1; i < PL_origargc; i++)
2746 PL_origargv[i] = 0;
79072805 2747 }
9d3968b2 2748#endif
e2975953 2749 UNLOCK_DOLLARZERO_MUTEX;
79072805 2750 break;
cd39f2b6 2751#endif
79072805
LW
2752 }
2753 return 0;
2754}
2755
2756I32
35a4481c 2757Perl_whichsig(pTHX_ const char *sig)
79072805 2758{
aadb217d 2759 register char* const* sigv;
96a5add6 2760 PERL_UNUSED_CONTEXT;
79072805 2761
aadb217d 2762 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2763 if (strEQ(sig,*sigv))
aadb217d 2764 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2765#ifdef SIGCLD
2766 if (strEQ(sig,"CHLD"))
2767 return SIGCLD;
2768#endif
2769#ifdef SIGCHLD
2770 if (strEQ(sig,"CLD"))
2771 return SIGCHLD;
2772#endif
7f1236c0 2773 return -1;
79072805
LW
2774}
2775
ecfc5424 2776Signal_t
1e82f5a6 2777#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 2778Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
1e82f5a6
SH
2779#else
2780Perl_sighandler(int sig)
2781#endif
79072805 2782{
1018e26f
NIS
2783#ifdef PERL_GET_SIG_CONTEXT
2784 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2785#else
cea2e8a9 2786 dTHX;
71d280e3 2787#endif
79072805 2788 dSP;
a0714e2c
SS
2789 GV *gv = NULL;
2790 SV *sv = NULL;
8772537c 2791 SV * const tSv = PL_Sv;
601f1833 2792 CV *cv = NULL;
533c011a 2793 OP *myop = PL_op;
84902520 2794 U32 flags = 0;
8772537c 2795 XPV * const tXpv = PL_Xpv;
71d280e3 2796
3280af22 2797 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2798 flags |= 1;
3280af22 2799 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2800 flags |= 4;
3280af22 2801 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2802 flags |= 16;
2803
727405f8 2804 if (!PL_psig_ptr[sig]) {
99ef548b 2805 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2806 PL_sig_name[sig]);
2807 exit(sig);
2808 }
ff0cee69 2809
84902520
TB
2810 /* Max number of items pushed there is 3*n or 4. We cannot fix
2811 infinity, so we fix 4 (in fact 5): */
2812 if (flags & 1) {
3280af22 2813 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2814 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2815 }
ac27b0f5 2816 if (flags & 4)
3280af22 2817 PL_markstack_ptr++; /* Protect mark. */
84902520 2818 if (flags & 16)
3280af22 2819 PL_scopestack_ix += 1;
84902520 2820 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2821 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2822 || SvTYPE(cv) != SVt_PVCV) {
2823 HV *st;
f2c0649b 2824 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2825 }
84902520 2826
a0d0e21e 2827 if (!cv || !CvROOT(cv)) {
599cee73 2828 if (ckWARN(WARN_SIGNAL))
9014280d 2829 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2830 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2831 : ((cv && CvGV(cv))
2832 ? GvENAME(CvGV(cv))
2833 : "__ANON__")));
2834 goto cleanup;
79072805
LW
2835 }
2836
22c35a8c 2837 if(PL_psig_name[sig]) {
b37c2d43 2838 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2839 flags |= 64;
df3728a2 2840#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2841 PL_sig_sv = sv;
df3728a2 2842#endif
84902520 2843 } else {
ff0cee69 2844 sv = sv_newmortal();
22c35a8c 2845 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2846 }
e336de0d 2847
e788e7d3 2848 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2849 PUSHMARK(SP);
79072805 2850 PUSHs(sv);
8aad04aa
JH
2851#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2852 {
2853 struct sigaction oact;
2854
2855 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH
2856 if (sip) {
2857 HV *sih = newHV();
2858 SV *rv = newRV_noinc((SV*)sih);
2859 /* The siginfo fields signo, code, errno, pid, uid,
2860 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC
2861 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
2862 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 2863#if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
85771703
NC
2864 hv_stores(sih, "errno", newSViv(sip->si_errno));
2865 hv_stores(sih, "status", newSViv(sip->si_status));
2866 hv_stores(sih, "uid", newSViv(sip->si_uid));
2867 hv_stores(sih, "pid", newSViv(sip->si_pid));
2868 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
2869 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 2870#endif
8aad04aa
JH
2871 EXTEND(SP, 2);
2872 PUSHs((SV*)rv);
10edeb5d 2873 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2874 }
b4552a27 2875
8aad04aa
JH
2876 }
2877 }
2878#endif
79072805 2879 PUTBACK;
a0d0e21e 2880
1b266415 2881 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2882
d3acc0f7 2883 POPSTACK;
1b266415 2884 if (SvTRUE(ERRSV)) {
1d615522 2885#ifndef PERL_MICRO
983dbef6 2886#ifdef HAS_SIGPROCMASK
1b266415
NIS
2887 /* Handler "died", for example to get out of a restart-able read().
2888 * Before we re-do that on its behalf re-enable the signal which was
2889 * blocked by the system when we entered.
2890 */
2891 sigset_t set;
2892 sigemptyset(&set);
2893 sigaddset(&set,sig);
2894 sigprocmask(SIG_UNBLOCK, &set, NULL);
2895#else
2896 /* Not clear if this will work */
2897 (void)rsignal(sig, SIG_IGN);
5c1546dc 2898 (void)rsignal(sig, PL_csighandlerp);
1b266415 2899#endif
1d615522 2900#endif /* !PERL_MICRO */
bd61b366 2901 Perl_die(aTHX_ NULL);
1b266415 2902 }
00d579c5 2903cleanup:
84902520 2904 if (flags & 1)
3280af22 2905 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2906 if (flags & 4)
3280af22 2907 PL_markstack_ptr--;
84902520 2908 if (flags & 16)
3280af22 2909 PL_scopestack_ix -= 1;
84902520
TB
2910 if (flags & 64)
2911 SvREFCNT_dec(sv);
533c011a 2912 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2913
3280af22
NIS
2914 PL_Sv = tSv; /* Restore global temporaries. */
2915 PL_Xpv = tXpv;
53bb94e2 2916 return;
79072805 2917}
4e35701f
NIS
2918
2919
51371543 2920static void
8772537c 2921S_restore_magic(pTHX_ const void *p)
51371543 2922{
97aff369 2923 dVAR;
8772537c
AL
2924 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2925 SV* const sv = mgs->mgs_sv;
51371543
GS
2926
2927 if (!sv)
2928 return;
2929
2930 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2931 {
f8c7b90f 2932#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2933 /* While magic was saved (and off) sv_setsv may well have seen
2934 this SV as a prime candidate for COW. */
2935 if (SvIsCOW(sv))
e424a81e 2936 sv_force_normal_flags(sv, 0);
f9701176
NC
2937#endif
2938
51371543
GS
2939 if (mgs->mgs_flags)
2940 SvFLAGS(sv) |= mgs->mgs_flags;
2941 else
2942 mg_magical(sv);
2b77b520
YST
2943 if (SvGMAGICAL(sv)) {
2944 /* downgrade public flags to private,
2945 and discard any other private flags */
2946
10edeb5d
JH
2947 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2948 if (pubflags) {
2949 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2950 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2951 }
2952 }
51371543
GS
2953 }
2954
2955 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2956
2957 /* If we're still on top of the stack, pop us off. (That condition
2958 * will be satisfied if restore_magic was called explicitly, but *not*
2959 * if it's being called via leave_scope.)
2960 * The reason for doing this is that otherwise, things like sv_2cv()
2961 * may leave alloc gunk on the savestack, and some code
2962 * (e.g. sighandler) doesn't expect that...
2963 */
2964 if (PL_savestack_ix == mgs->mgs_ss_ix)
2965 {
2966 I32 popval = SSPOPINT;
c76ac1ee 2967 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2968 PL_savestack_ix -= 2;
2969 popval = SSPOPINT;
2970 assert(popval == SAVEt_ALLOC);
2971 popval = SSPOPINT;
2972 PL_savestack_ix -= popval;
2973 }
2974
2975}
2976
2977static void
8772537c 2978S_unwind_handler_stack(pTHX_ const void *p)
51371543 2979{
27da23d5 2980 dVAR;
e1ec3a88 2981 const U32 flags = *(const U32*)p;
51371543
GS
2982
2983 if (flags & 1)
2984 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2985#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2986 if (flags & 64)
27da23d5 2987 SvREFCNT_dec(PL_sig_sv);
df3728a2 2988#endif
51371543 2989}
1018e26f 2990
66610fdd 2991/*
b3ca2e83
NC
2992=for apidoc magic_sethint
2993
2994Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
2995C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
2996anything that would need a deep copy. Maybe we should warn if we find a
2997reference.
b3ca2e83
NC
2998
2999=cut
3000*/
3001int
3002Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3003{
3004 dVAR;
3005 assert(mg->mg_len == HEf_SVKEY);
3006
e6e3e454
NC
3007 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3008 an alternative leaf in there, with PL_compiling.cop_hints being used if
3009 it's NULL. If needed for threads, the alternative could lock a mutex,
3010 or take other more complex action. */
3011
5b9c0671
NC
3012 /* Something changed in %^H, so it will need to be restored on scope exit.
3013 Doing this here saves a lot of doing it manually in perl code (and
3014 forgetting to do it, and consequent subtle errors. */
3015 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3016 PL_compiling.cop_hints_hash
3017 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 3018 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
3019 return 0;
3020}
3021
3022/*
3023=for apidoc magic_sethint
3024
c28fe1ec
NC
3025Triggered by a delete from %^H, records the key to
3026C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3027
3028=cut
3029*/
3030int
3031Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3032{
3033 dVAR;
f5a63d97
AL
3034 PERL_UNUSED_ARG(sv);
3035
b3ca2e83
NC
3036 assert(mg->mg_len == HEf_SVKEY);
3037
b3f24c00
MHM
3038 PERL_UNUSED_ARG(sv);
3039
5b9c0671 3040 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3041 PL_compiling.cop_hints_hash
3042 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3043 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3044 return 0;
3045}
3046
3047/*
66610fdd
RGS
3048 * Local variables:
3049 * c-indentation-style: bsd
3050 * c-basic-offset: 4
3051 * indent-tabs-mode: t
3052 * End:
3053 *
37442d52
RGS
3054 * ex: set ts=8 sts=4 sw=4 noet:
3055 */