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Fix a CPANPLUS test that fails when run on a read-only source tree
[perl5.git] / mg.c
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a0d0e21e 1/* mg.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
7272f7c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
12 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent."
79072805
LW
14 */
15
ccfc67b7
JH
16/*
17=head1 Magical Functions
166f8a29
DM
18
19"Magic" is special data attached to SV structures in order to give them
20"magical" properties. When any Perl code tries to read from, or assign to,
21an SV marked as magical, it calls the 'get' or 'set' function associated
22with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 23give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
24number of the last read filehandle into to the SV's IV slot), while
25set is called after an SV has been written to, in order to allow it to make
ddfa107c 26use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
27PL_rs global variable).
28
29Magic is implemented as a linked list of MAGIC structures attached to the
30SV. Each MAGIC struct holds the type of the magic, a pointer to an array
31of functions that implement the get(), set(), length() etc functions,
32plus space for some flags and pointers. For example, a tied variable has
33a MAGIC structure that contains a pointer to the object associated with the
34tie.
35
ccfc67b7
JH
36*/
37
79072805 38#include "EXTERN.h"
864dbfa3 39#define PERL_IN_MG_C
79072805
LW
40#include "perl.h"
41
5cd24f17 42#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
43# ifdef I_GRP
44# include <grp.h>
45# endif
188ea221
CS
46#endif
47
757f63d8
SP
48#if defined(HAS_SETGROUPS)
49# ifndef NGROUPS
50# define NGROUPS 32
51# endif
52#endif
53
17aa7f3d
JH
54#ifdef __hpux
55# include <sys/pstat.h>
56#endif
57
8aad04aa
JH
58#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
59Signal_t Perl_csighandler(int sig, ...);
60#else
e69880a5 61Signal_t Perl_csighandler(int sig);
8aad04aa 62#endif
e69880a5 63
9cffb111
OS
64#ifdef __Lynx__
65/* Missing protos on LynxOS */
66void setruid(uid_t id);
67void seteuid(uid_t id);
68void setrgid(uid_t id);
69void setegid(uid_t id);
70#endif
71
c07a80fd
PP
72/*
73 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
74 */
75
76struct magic_state {
77 SV* mgs_sv;
78 U32 mgs_flags;
455ece5e 79 I32 mgs_ss_ix;
c07a80fd 80};
455ece5e 81/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
82
83STATIC void
8fb26106 84S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 85{
97aff369 86 dVAR;
455ece5e 87 MGS* mgs;
c07a80fd 88 assert(SvMAGICAL(sv));
d8b2590f
NC
89 /* Turning READONLY off for a copy-on-write scalar (including shared
90 hash keys) is a bad idea. */
765f542d 91 if (SvIsCOW(sv))
9a265e59 92 sv_force_normal_flags(sv, 0);
c07a80fd 93
8772537c 94 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
95
96 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd
PP
97 mgs->mgs_sv = sv;
98 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
455ece5e 99 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
c07a80fd
PP
100
101 SvMAGICAL_off(sv);
102 SvREADONLY_off(sv);
085bde85
NC
103 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
104 /* No public flags are set, so promote any private flags to public. */
105 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
106 }
c07a80fd
PP
107}
108
954c1994
GS
109/*
110=for apidoc mg_magical
111
112Turns on the magical status of an SV. See C<sv_magic>.
113
114=cut
115*/
116
8990e307 117void
864dbfa3 118Perl_mg_magical(pTHX_ SV *sv)
8990e307 119{
e1ec3a88 120 const MAGIC* mg;
96a5add6 121 PERL_UNUSED_CONTEXT;
8990e307 122 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 123 const MGVTBL* const vtbl = mg->mg_virtual;
8990e307 124 if (vtbl) {
2b260de0 125 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
8990e307
LW
126 SvGMAGICAL_on(sv);
127 if (vtbl->svt_set)
128 SvSMAGICAL_on(sv);
2b260de0 129 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
8990e307
LW
130 SvRMAGICAL_on(sv);
131 }
132 }
133}
134
2767dea0
DM
135
136/* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
137
138STATIC bool
139S_is_container_magic(const MAGIC *mg)
140{
141 switch (mg->mg_type) {
142 case PERL_MAGIC_bm:
143 case PERL_MAGIC_fm:
144 case PERL_MAGIC_regex_global:
145 case PERL_MAGIC_nkeys:
146#ifdef USE_LOCALE_COLLATE
147 case PERL_MAGIC_collxfrm:
148#endif
149 case PERL_MAGIC_qr:
150 case PERL_MAGIC_taint:
151 case PERL_MAGIC_vec:
152 case PERL_MAGIC_vstring:
153 case PERL_MAGIC_utf8:
154 case PERL_MAGIC_substr:
155 case PERL_MAGIC_defelem:
156 case PERL_MAGIC_arylen:
157 case PERL_MAGIC_pos:
158 case PERL_MAGIC_backref:
159 case PERL_MAGIC_arylen_p:
160 case PERL_MAGIC_rhash:
161 case PERL_MAGIC_symtab:
162 return 0;
163 default:
164 return 1;
165 }
166}
167
954c1994
GS
168/*
169=for apidoc mg_get
170
171Do magic after a value is retrieved from the SV. See C<sv_magic>.
172
173=cut
174*/
175
79072805 176int
864dbfa3 177Perl_mg_get(pTHX_ SV *sv)
79072805 178{
97aff369 179 dVAR;
35a4481c 180 const I32 mgs_ix = SSNEW(sizeof(MGS));
fe2774ed 181 const bool was_temp = (bool)SvTEMP(sv);
0723351e 182 int have_new = 0;
ff76feab 183 MAGIC *newmg, *head, *cur, *mg;
20135930 184 /* guard against sv having being freed midway by holding a private
6683b158
NC
185 reference. */
186
187 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
188 cause the SV's buffer to get stolen (and maybe other stuff).
189 So restore it.
190 */
46da273f 191 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC
192 if (!was_temp) {
193 SvTEMP_off(sv);
194 }
195
455ece5e 196 save_magic(mgs_ix, sv);
463ee0b2 197
ff76feab
AMS
198 /* We must call svt_get(sv, mg) for each valid entry in the linked
199 list of magic. svt_get() may delete the current entry, add new
200 magic to the head of the list, or upgrade the SV. AMS 20010810 */
201
202 newmg = cur = head = mg = SvMAGIC(sv);
203 while (mg) {
35a4481c 204 const MGVTBL * const vtbl = mg->mg_virtual;
ff76feab 205
2b260de0 206 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 207 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 208
58f82c5c
DM
209 /* guard against magic having been deleted - eg FETCH calling
210 * untie */
211 if (!SvMAGIC(sv))
212 break;
b77f7d40 213
ff76feab
AMS
214 /* Don't restore the flags for this entry if it was deleted. */
215 if (mg->mg_flags & MGf_GSKIP)
216 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
a0d0e21e 217 }
ff76feab
AMS
218
219 mg = mg->mg_moremagic;
220
0723351e 221 if (have_new) {
ff76feab
AMS
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
224 if (mg == head) {
0723351e 225 have_new = 0;
ff76feab
AMS
226 mg = cur;
227 head = newmg;
228 }
229 }
230
231 /* Were any new entries added? */
0723351e
NC
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
233 have_new = 1;
ff76feab
AMS
234 cur = mg;
235 mg = newmg;
760ac839 236 }
79072805 237 }
463ee0b2 238
8772537c 239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC
240
241 if (SvREFCNT(sv) == 1) {
242 /* We hold the last reference to this SV, which implies that the
243 SV was deleted as a side effect of the routines we called. */
0c34ef67 244 SvOK_off(sv);
6683b158 245 }
79072805
LW
246 return 0;
247}
248
954c1994
GS
249/*
250=for apidoc mg_set
251
252Do magic after a value is assigned to the SV. See C<sv_magic>.
253
254=cut
255*/
256
79072805 257int
864dbfa3 258Perl_mg_set(pTHX_ SV *sv)
79072805 259{
97aff369 260 dVAR;
35a4481c 261 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 262 MAGIC* mg;
463ee0b2
LW
263 MAGIC* nextmg;
264
455ece5e 265 save_magic(mgs_ix, sv);
463ee0b2
LW
266
267 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 268 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 269 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
270 if (mg->mg_flags & MGf_GSKIP) {
271 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
455ece5e 272 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
a0d0e21e 273 }
e7cbf6c6
DM
274 if (PL_localizing == 2 && !S_is_container_magic(mg))
275 continue;
2b260de0 276 if (vtbl && vtbl->svt_set)
fc0dc3b3 277 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 278 }
463ee0b2 279
8772537c 280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
281 return 0;
282}
283
954c1994
GS
284/*
285=for apidoc mg_length
286
287Report on the SV's length. See C<sv_magic>.
288
289=cut
290*/
291
79072805 292U32
864dbfa3 293Perl_mg_length(pTHX_ SV *sv)
79072805 294{
97aff369 295 dVAR;
79072805 296 MAGIC* mg;
463ee0b2 297 STRLEN len;
463ee0b2 298
79072805 299 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 300 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 301 if (vtbl && vtbl->svt_len) {
35a4481c 302 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 303 save_magic(mgs_ix, sv);
a0d0e21e 304 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 305 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 306 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
307 return len;
308 }
309 }
310
35a4481c 311 if (DO_UTF8(sv)) {
10516c54 312 const U8 *s = (U8*)SvPV_const(sv, len);
f5a63d97 313 len = utf8_length(s, s + len);
5636d518
DB
314 }
315 else
10516c54 316 (void)SvPV_const(sv, len);
463ee0b2 317 return len;
79072805
LW
318}
319
8fb26106 320I32
864dbfa3 321Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
322{
323 MAGIC* mg;
ac27b0f5 324
93965878 325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 326 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 327 if (vtbl && vtbl->svt_len) {
35a4481c
AL
328 const I32 mgs_ix = SSNEW(sizeof(MGS));
329 I32 len;
455ece5e 330 save_magic(mgs_ix, sv);
93965878 331 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 332 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 333 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
334 return len;
335 }
336 }
337
338 switch(SvTYPE(sv)) {
339 case SVt_PVAV:
35a4481c 340 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
93965878
NIS
341 case SVt_PVHV:
342 /* FIXME */
343 default:
cea2e8a9 344 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
345 break;
346 }
347 return 0;
348}
349
954c1994
GS
350/*
351=for apidoc mg_clear
352
353Clear something magical that the SV represents. See C<sv_magic>.
354
355=cut
356*/
357
79072805 358int
864dbfa3 359Perl_mg_clear(pTHX_ SV *sv)
79072805 360{
35a4481c 361 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 362 MAGIC* mg;
463ee0b2 363
455ece5e 364 save_magic(mgs_ix, sv);
463ee0b2 365
79072805 366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 367 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 368 /* omit GSKIP -- never set here */
727405f8 369
2b260de0 370 if (vtbl && vtbl->svt_clear)
fc0dc3b3 371 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 372 }
463ee0b2 373
8772537c 374 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
375 return 0;
376}
377
954c1994
GS
378/*
379=for apidoc mg_find
380
381Finds the magic pointer for type matching the SV. See C<sv_magic>.
382
383=cut
384*/
385
93a17b20 386MAGIC*
35a4481c 387Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 388{
96a5add6 389 PERL_UNUSED_CONTEXT;
35a4481c
AL
390 if (sv) {
391 MAGIC *mg;
392 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
393 if (mg->mg_type == type)
394 return mg;
395 }
93a17b20 396 }
5f66b61c 397 return NULL;
93a17b20
LW
398}
399
954c1994
GS
400/*
401=for apidoc mg_copy
402
403Copies the magic from one SV to another. See C<sv_magic>.
404
405=cut
406*/
407
79072805 408int
864dbfa3 409Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 410{
463ee0b2 411 int count = 0;
79072805 412 MAGIC* mg;
463ee0b2 413 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 414 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS
415 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
416 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
417 }
823a54a3
AL
418 else {
419 const char type = mg->mg_type;
1e73acc8 420 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
421 sv_magic(nsv,
422 (type == PERL_MAGIC_tied)
423 ? SvTIED_obj(sv, mg)
424 : (type == PERL_MAGIC_regdata && mg->mg_obj)
425 ? sv
426 : mg->mg_obj,
427 toLOWER(type), key, klen);
428 count++;
429 }
79072805 430 }
79072805 431 }
463ee0b2 432 return count;
79072805
LW
433}
434
954c1994 435/*
0cbee0a4
DM
436=for apidoc mg_localize
437
438Copy some of the magic from an existing SV to new localized version of
439that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
440doesn't (eg taint, pos).
441
442=cut
443*/
444
445void
446Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
447{
97aff369 448 dVAR;
0cbee0a4
DM
449 MAGIC *mg;
450 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 451 const MGVTBL* const vtbl = mg->mg_virtual;
2767dea0 452 if (!S_is_container_magic(mg))
0cbee0a4 453 continue;
0cbee0a4 454
a5063e7c
DM
455 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
456 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
457 else
0cbee0a4
DM
458 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
459 mg->mg_ptr, mg->mg_len);
a5063e7c 460
0cbee0a4
DM
461 /* container types should remain read-only across localization */
462 SvFLAGS(nsv) |= SvREADONLY(sv);
463 }
464
465 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
466 SvFLAGS(nsv) |= SvMAGICAL(sv);
467 PL_localizing = 1;
468 SvSETMAGIC(nsv);
469 PL_localizing = 0;
470 }
471}
472
473/*
954c1994
GS
474=for apidoc mg_free
475
476Free any magic storage used by the SV. See C<sv_magic>.
477
478=cut
479*/
480
79072805 481int
864dbfa3 482Perl_mg_free(pTHX_ SV *sv)
79072805
LW
483{
484 MAGIC* mg;
485 MAGIC* moremagic;
486 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 487 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 488 moremagic = mg->mg_moremagic;
2b260de0 489 if (vtbl && vtbl->svt_free)
fc0dc3b3 490 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 491 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 492 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 493 Safefree(mg->mg_ptr);
565764a8 494 else if (mg->mg_len == HEf_SVKEY)
88e89b8a 495 SvREFCNT_dec((SV*)mg->mg_ptr);
d460ef45 496 }
b881518d
JH
497 if (mg->mg_flags & MGf_REFCOUNTED)
498 SvREFCNT_dec(mg->mg_obj);
79072805
LW
499 Safefree(mg);
500 }
b162af07 501 SvMAGIC_set(sv, NULL);
79072805
LW
502 return 0;
503}
504
79072805 505#include <signal.h>
79072805 506
942e002e 507U32
864dbfa3 508Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 509{
97aff369 510 dVAR;
8772537c 511 PERL_UNUSED_ARG(sv);
6cef1e77 512
0bd48802
AL
513 if (PL_curpm) {
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
515 if (rx) {
a678b0e4
YO
516 if (mg->mg_obj) { /* @+ */
517 /* return the number possible */
518 return rx->nparens;
519 } else { /* @- */
520 I32 paren = rx->lastparen;
521
522 /* return the last filled */
f46c4081 523 while ( paren >= 0
f0ab9afb
NC
524 && (rx->offs[paren].start == -1
525 || rx->offs[paren].end == -1) )
f46c4081 526 paren--;
a678b0e4
YO
527 return (U32)paren;
528 }
0bd48802 529 }
8f580fb8 530 }
ac27b0f5 531
942e002e 532 return (U32)-1;
6cef1e77
IZ
533}
534
535int
864dbfa3 536Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 537{
97aff369 538 dVAR;
0bd48802
AL
539 if (PL_curpm) {
540 register const REGEXP * const rx = PM_GETRE(PL_curpm);
541 if (rx) {
542 register const I32 paren = mg->mg_len;
543 register I32 s;
544 register I32 t;
545 if (paren < 0)
546 return 0;
547 if (paren <= (I32)rx->nparens &&
f0ab9afb
NC
548 (s = rx->offs[paren].start) != -1 &&
549 (t = rx->offs[paren].end) != -1)
0bd48802
AL
550 {
551 register I32 i;
552 if (mg->mg_obj) /* @+ */
553 i = t;
554 else /* @- */
555 i = s;
556
557 if (i > 0 && RX_MATCH_UTF8(rx)) {
558 const char * const b = rx->subbeg;
559 if (b)
f5a63d97 560 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 561 }
727405f8 562
0bd48802 563 sv_setiv(sv, i);
1aa99e6b 564 }
0bd48802 565 }
6cef1e77
IZ
566 }
567 return 0;
568}
569
e4b89193 570int
a29d06ed
MG
571Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
572{
d4c19fe8
AL
573 PERL_UNUSED_ARG(sv);
574 PERL_UNUSED_ARG(mg);
a29d06ed 575 Perl_croak(aTHX_ PL_no_modify);
0dbb1585 576 NORETURN_FUNCTION_END;
a29d06ed
MG
577}
578
93a17b20 579U32
864dbfa3 580Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 581{
97aff369 582 dVAR;
93a17b20 583 register I32 paren;
93a17b20 584 register I32 i;
dd374669 585 register const REGEXP *rx;
a197cbdd 586 I32 s1, t1;
93a17b20
LW
587
588 switch (*mg->mg_ptr) {
589 case '1': case '2': case '3': case '4':
590 case '5': case '6': case '7': case '8': case '9': case '&':
aaa362c4 591 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
cf93c79d 592
ffc61ed2 593 paren = atoi(mg->mg_ptr); /* $& is in [0] */
93a17b20 594 getparen:
eb160463 595 if (paren <= (I32)rx->nparens &&
f0ab9afb
NC
596 (s1 = rx->offs[paren].start) != -1 &&
597 (t1 = rx->offs[paren].end) != -1)
bbce6d69 598 {
cf93c79d 599 i = t1 - s1;
a197cbdd 600 getlen:
a30b2f1f 601 if (i > 0 && RX_MATCH_UTF8(rx)) {
a28509cc 602 const char * const s = rx->subbeg + s1;
768c67ee
JH
603 const U8 *ep;
604 STRLEN el;
ffc61ed2 605
6d5fa195 606 i = t1 - s1;
768c67ee
JH
607 if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
608 i = el;
a197cbdd 609 }
ffc61ed2 610 if (i < 0)
0844c848 611 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 612 return i;
93a17b20 613 }
235bddc8
NIS
614 else {
615 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 616 report_uninit(sv);
235bddc8
NIS
617 }
618 }
619 else {
620 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 621 report_uninit(sv);
93a17b20 622 }
748a9306 623 return 0;
93a17b20 624 case '+':
aaa362c4 625 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 626 paren = rx->lastparen;
13f57bf8
CS
627 if (paren)
628 goto getparen;
93a17b20 629 }
748a9306 630 return 0;
a01268b5
JH
631 case '\016': /* ^N */
632 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
633 paren = rx->lastcloseparen;
634 if (paren)
635 goto getparen;
636 }
637 return 0;
93a17b20 638 case '`':
aaa362c4 639 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
f0ab9afb
NC
640 if (rx->offs[0].start != -1) {
641 i = rx->offs[0].start;
a197cbdd
GS
642 if (i > 0) {
643 s1 = 0;
644 t1 = i;
645 goto getlen;
646 }
93a17b20 647 }
93a17b20 648 }
748a9306 649 return 0;
93a17b20 650 case '\'':
aaa362c4 651 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
f0ab9afb
NC
652 if (rx->offs[0].end != -1) {
653 i = rx->sublen - rx->offs[0].end;
a197cbdd 654 if (i > 0) {
f0ab9afb 655 s1 = rx->offs[0].end;
a197cbdd
GS
656 t1 = rx->sublen;
657 goto getlen;
658 }
93a17b20 659 }
93a17b20 660 }
748a9306 661 return 0;
93a17b20
LW
662 }
663 magic_get(sv,mg);
2d8e6c8d 664 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 665 sv_2pv(sv, 0);
2d8e6c8d 666 }
93a17b20
LW
667 if (SvPOK(sv))
668 return SvCUR(sv);
669 return 0;
670}
671
ad3296c6 672#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
673 if (SvPOK(sv)) { \
674 STRLEN len = SvCUR(sv); \
675 char * const p = SvPVX(sv); \
8e6b4db6
PC
676 while (len > 0 && isSPACE(p[len-1])) \
677 --len; \
678 SvCUR_set(sv, len); \
679 p[len] = '\0'; \
680 } \
ad3296c6
SH
681} STMT_END
682
8b850bd5
NC
683void
684Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
685{
686 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
687 sv_setsv(sv, &PL_sv_undef);
688 else {
689 sv_setpvs(sv, "");
690 SvUTF8_off(sv);
691 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
692 SV *const value = Perl_refcounted_he_fetch(aTHX_
693 c->cop_hints_hash,
694 0, "open<", 5, 0, 0);
695 assert(value);
696 sv_catsv(sv, value);
697 }
698 sv_catpvs(sv, "\0");
699 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
700 SV *const value = Perl_refcounted_he_fetch(aTHX_
701 c->cop_hints_hash,
702 0, "open>", 5, 0, 0);
703 assert(value);
704 sv_catsv(sv, value);
705 }
706 }
707}
708
79072805 709int
864dbfa3 710Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 711{
27da23d5 712 dVAR;
79072805 713 register I32 paren;
35272f84 714 register char *s = NULL;
d9f97599 715 register REGEXP *rx;
823a54a3
AL
716 const char * const remaining = mg->mg_ptr + 1;
717 const char nextchar = *remaining;
79072805
LW
718
719 switch (*mg->mg_ptr) {
748a9306 720 case '\001': /* ^A */
3280af22 721 sv_setsv(sv, PL_bodytarget);
748a9306 722 break;
e5218da5 723 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 724 if (nextchar == '\0') {
e5218da5
GA
725 sv_setiv(sv, (IV)PL_minus_c);
726 }
823a54a3 727 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
728 sv_setiv(sv, (IV)STATUS_NATIVE);
729 }
49460fe6
NIS
730 break;
731
79072805 732 case '\004': /* ^D */
aea4f609 733 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 734 break;
28f23441 735 case '\005': /* ^E */
823a54a3 736 if (nextchar == '\0') {
4b645107 737#if defined(MACOS_TRADITIONAL)
0a378802
JH
738 {
739 char msg[256];
727405f8 740
0a378802 741 sv_setnv(sv,(double)gMacPerl_OSErr);
727405f8 742 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
0a378802 743 }
4b645107 744#elif defined(VMS)
0a378802
JH
745 {
746# include <descrip.h>
747# include <starlet.h>
748 char msg[255];
749 $DESCRIPTOR(msgdsc,msg);
750 sv_setnv(sv,(NV) vaxc$errno);
751 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
752 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
753 else
c69006e4 754 sv_setpvn(sv,"",0);
0a378802 755 }
4b645107 756#elif defined(OS2)
0a378802
JH
757 if (!(_emx_env & 0x200)) { /* Under DOS */
758 sv_setnv(sv, (NV)errno);
759 sv_setpv(sv, errno ? Strerror(errno) : "");
760 } else {
761 if (errno != errno_isOS2) {
823a54a3 762 const int tmp = _syserrno();
0a378802
JH
763 if (tmp) /* 2nd call to _syserrno() makes it 0 */
764 Perl_rc = tmp;
765 }
766 sv_setnv(sv, (NV)Perl_rc);
767 sv_setpv(sv, os2error(Perl_rc));
768 }
4b645107 769#elif defined(WIN32)
0a378802 770 {
d4c19fe8 771 const DWORD dwErr = GetLastError();
0a378802 772 sv_setnv(sv, (NV)dwErr);
823a54a3 773 if (dwErr) {
0a378802
JH
774 PerlProc_GetOSError(sv, dwErr);
775 }
776 else
c69006e4 777 sv_setpvn(sv, "", 0);
0a378802
JH
778 SetLastError(dwErr);
779 }
22fae026 780#else
f6c8f21d 781 {
8772537c 782 const int saveerrno = errno;
f6c8f21d 783 sv_setnv(sv, (NV)errno);
666ea192 784 sv_setpv(sv, errno ? Strerror(errno) : "");
f6c8f21d
RGS
785 errno = saveerrno;
786 }
28f23441 787#endif
ad3296c6 788 SvRTRIM(sv);
0a378802
JH
789 SvNOK_on(sv); /* what a wonderful hack! */
790 }
823a54a3 791 else if (strEQ(remaining, "NCODING"))
0a378802
JH
792 sv_setsv(sv, PL_encoding);
793 break;
79072805 794 case '\006': /* ^F */
3280af22 795 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 796 break;
a0d0e21e 797 case '\010': /* ^H */
3280af22 798 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 799 break;
9d116dd7 800 case '\011': /* ^I */ /* NOT \t in EBCDIC */
3280af22
NIS
801 if (PL_inplace)
802 sv_setpv(sv, PL_inplace);
79072805 803 else
3280af22 804 sv_setsv(sv, &PL_sv_undef);
79072805 805 break;
ac27b0f5 806 case '\017': /* ^O & ^OPEN */
823a54a3 807 if (nextchar == '\0') {
ac27b0f5 808 sv_setpv(sv, PL_osname);
3511154c
DM
809 SvTAINTED_off(sv);
810 }
823a54a3 811 else if (strEQ(remaining, "PEN")) {
8b850bd5 812 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 813 }
28f23441 814 break;
cde0cee5
YO
815 case '\020':
816 if (nextchar == '\0') { /* ^P */
817 sv_setiv(sv, (IV)PL_perldb);
818 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
819 goto do_prematch_fetch;
820 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
821 goto do_postmatch_fetch;
822 }
79072805 823 break;
fb73857a 824 case '\023': /* ^S */
823a54a3 825 if (nextchar == '\0') {
3280af22 826 if (PL_lex_state != LEX_NOTPARSING)
0c34ef67 827 SvOK_off(sv);
3280af22 828 else if (PL_in_eval)
6dc8a9e4 829 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
830 else
831 sv_setiv(sv, 0);
d58bf5aa 832 }
fb73857a 833 break;
79072805 834 case '\024': /* ^T */
823a54a3 835 if (nextchar == '\0') {
88e89b8a 836#ifdef BIG_TIME
7c36658b 837 sv_setnv(sv, PL_basetime);
88e89b8a 838#else
7c36658b 839 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 840#endif
7c36658b 841 }
823a54a3 842 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
843 sv_setiv(sv, PL_tainting
844 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
845 : 0);
7c36658b 846 break;
e07ea26a 847 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 848 if (strEQ(remaining, "NICODE"))
a05d7ebb 849 sv_setuv(sv, (UV) PL_unicode);
823a54a3 850 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 851 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
852 else if (strEQ(remaining, "TF8CACHE"))
853 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
854 break;
855 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 856 if (nextchar == '\0')
4438c4b7 857 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 858 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 859 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 860 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
861 }
862 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH
863 sv_setpvn(
864 sv,
865 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
866 WARNsize
867 );
013b78e8 868 }
d3a7d8c7 869 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
870 /* Get the bit mask for $warnings::Bits{all}, because
871 * it could have been extended by warnings::register */
823a54a3 872 HV * const bits=get_hv("warnings::Bits", FALSE);
f5a63d97
AL
873 if (bits) {
874 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
875 if (bits_all)
876 sv_setsv(sv, *bits_all);
75b6c4ca
RGS
877 }
878 else {
879 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
880 }
ac27b0f5 881 }
4438c4b7 882 else {
72dc9ed5
NC
883 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
884 *PL_compiling.cop_warnings);
ac27b0f5 885 }
d3a7d8c7 886 SvPOK_only(sv);
4438c4b7 887 }
79072805 888 break;
cde0cee5
YO
889 case '\015': /* $^MATCH */
890 if (strEQ(remaining, "ATCH")) {
79072805
LW
891 case '1': case '2': case '3': case '4':
892 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
893 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
894 /*
895 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
896 * XXX Does the new way break anything?
897 */
898 paren = atoi(mg->mg_ptr); /* $& is in [0] */
93b32b6d 899 CALLREG_NUMBUF(rx,paren,sv);
cde0cee5
YO
900 break;
901 }
902 sv_setsv(sv,&PL_sv_undef);
79072805
LW
903 }
904 break;
905 case '+':
aaa362c4 906 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 907 if (rx->lastparen) {
93b32b6d 908 CALLREG_NUMBUF(rx,rx->lastparen,sv);
44a2ac75
YO
909 break;
910 }
79072805 911 }
3280af22 912 sv_setsv(sv,&PL_sv_undef);
79072805 913 break;
a01268b5
JH
914 case '\016': /* ^N */
915 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 916 if (rx->lastcloseparen) {
93b32b6d 917 CALLREG_NUMBUF(rx,rx->lastcloseparen,sv);
44a2ac75
YO
918 break;
919 }
920
a01268b5
JH
921 }
922 sv_setsv(sv,&PL_sv_undef);
923 break;
79072805 924 case '`':
cde0cee5 925 do_prematch_fetch:
aaa362c4 926 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
93b32b6d
YO
927 CALLREG_NUMBUF(rx,-2,sv);
928 break;
79072805 929 }
3280af22 930 sv_setsv(sv,&PL_sv_undef);
79072805
LW
931 break;
932 case '\'':
cde0cee5 933 do_postmatch_fetch:
aaa362c4 934 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
93b32b6d
YO
935 CALLREG_NUMBUF(rx,-1,sv);
936 break;
79072805 937 }
3280af22 938 sv_setsv(sv,&PL_sv_undef);
79072805
LW
939 break;
940 case '.':
3280af22 941 if (GvIO(PL_last_in_gv)) {
357c8808 942 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 943 }
79072805
LW
944 break;
945 case '?':
809a5acc 946 {
809a5acc 947 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 948#ifdef COMPLEX_STATUS
6b88bc9c
GS
949 LvTARGOFF(sv) = PL_statusvalue;
950 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 951#endif
809a5acc 952 }
79072805
LW
953 break;
954 case '^':
0daa599b
RGS
955 if (GvIOp(PL_defoutgv))
956 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
957 if (s)
958 sv_setpv(sv,s);
959 else {
3280af22 960 sv_setpv(sv,GvENAME(PL_defoutgv));
79072805
LW
961 sv_catpv(sv,"_TOP");
962 }
963 break;
964 case '~':
0daa599b
RGS
965 if (GvIOp(PL_defoutgv))
966 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 967 if (!s)
3280af22 968 s = GvENAME(PL_defoutgv);
79072805
LW
969 sv_setpv(sv,s);
970 break;
79072805 971 case '=':
0daa599b
RGS
972 if (GvIOp(PL_defoutgv))
973 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
974 break;
975 case '-':
0daa599b
RGS
976 if (GvIOp(PL_defoutgv))
977 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
978 break;
979 case '%':
0daa599b
RGS
980 if (GvIOp(PL_defoutgv))
981 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 982 break;
79072805
LW
983 case ':':
984 break;
985 case '/':
986 break;
987 case '[':
11206fdd 988 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW
989 break;
990 case '|':
0daa599b
RGS
991 if (GvIOp(PL_defoutgv))
992 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
993 break;
994 case ',':
79072805
LW
995 break;
996 case '\\':
b2ce0fda 997 if (PL_ors_sv)
f28098ff 998 sv_copypv(sv, PL_ors_sv);
79072805 999 break;
79072805 1000 case '!':
a5f75d66 1001#ifdef VMS
65202027 1002 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 1003 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 1004#else
88e89b8a 1005 {
8772537c 1006 const int saveerrno = errno;
65202027 1007 sv_setnv(sv, (NV)errno);
88e89b8a 1008#ifdef OS2
ed344e4f
IZ
1009 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1010 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 1011 else
a5f75d66 1012#endif
666ea192 1013 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
1014 errno = saveerrno;
1015 }
1016#endif
ad3296c6 1017 SvRTRIM(sv);
946ec16e 1018 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1019 break;
1020 case '<':
3280af22 1021 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1022 break;
1023 case '>':
3280af22 1024 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1025 break;
1026 case '(':
3280af22 1027 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1028 goto add_groups;
1029 case ')':
3280af22 1030 sv_setiv(sv, (IV)PL_egid);
79072805 1031 add_groups:
79072805 1032#ifdef HAS_GETGROUPS
79072805 1033 {
57d7c65e 1034 Groups_t *gary = NULL;
fb45abb2 1035 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1036 Newx(gary, num_groups, Groups_t);
1037 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1038 for (i = 0; i < num_groups; i++)
1039 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1040 Safefree(gary);
79072805 1041 }
155aba94 1042 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1043#endif
79072805 1044 break;
cd39f2b6 1045#ifndef MACOS_TRADITIONAL
79072805
LW
1046 case '0':
1047 break;
cd39f2b6 1048#endif
79072805 1049 }
a0d0e21e 1050 return 0;
79072805
LW
1051}
1052
1053int
864dbfa3 1054Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1055{
8772537c 1056 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1057
1058 if (uf && uf->uf_val)
24f81a43 1059 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1060 return 0;
1061}
1062
1063int
864dbfa3 1064Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1065{
27da23d5 1066 dVAR;
9ae3433d 1067 STRLEN len = 0, klen;
666ea192 1068 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1069 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1070 my_setenv(ptr, s);
1e422769 1071
a0d0e21e
LW
1072#ifdef DYNAMIC_ENV_FETCH
1073 /* We just undefd an environment var. Is a replacement */
1074 /* waiting in the wings? */
1075 if (!len) {
fabdb6c0
AL
1076 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1077 if (valp)
4ab59fcc 1078 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1079 }
1080#endif
1e422769 1081
39e571d4 1082#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1083 /* And you'll never guess what the dog had */
1084 /* in its mouth... */
3280af22 1085 if (PL_tainting) {
1e422769
PP
1086 MgTAINTEDDIR_off(mg);
1087#ifdef VMS
5aabfad6 1088 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1089 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1090 Stat_t sbuf;
1e422769
PP
1091 int i = 0, j = 0;
1092
6fca0082 1093 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1094 elt = eltbuf;
1e422769
PP
1095 do { /* DCL$PATH may be a search list */
1096 while (1) { /* as may dev portion of any element */
1097 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1098 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1099 cando_by_name(S_IWUSR,0,elt) ) {
1100 MgTAINTEDDIR_on(mg);
1101 return 0;
1102 }
1103 }
bd61b366 1104 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1105 *cp = '\0';
1106 if (my_trnlnm(elt, eltbuf, j++))
1107 elt = eltbuf;
1108 else
1109 break;
1110 }
1111 j = 0;
1112 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1113 }
1114#endif /* VMS */
5aabfad6 1115 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1116 const char * const strend = s + len;
463ee0b2
LW
1117
1118 while (s < strend) {
96827780 1119 char tmpbuf[256];
c623ac67 1120 Stat_t st;
5f74f29c 1121 I32 i;
f5a63d97
AL
1122#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1123 const char path_sep = '|';
1124#else
1125 const char path_sep = ':';
1126#endif
96827780 1127 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1128 s, strend, path_sep, &i);
463ee0b2 1129 s++;
bb7a0f54 1130 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1131#ifdef VMS
1132 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1133#else
1134 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1135#endif
c6ed36e1 1136 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1137 MgTAINTEDDIR_on(mg);
1e422769
PP
1138 return 0;
1139 }
463ee0b2 1140 }
79072805
LW
1141 }
1142 }
39e571d4 1143#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1144
79072805
LW
1145 return 0;
1146}
1147
1148int
864dbfa3 1149Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1150{
8772537c 1151 PERL_UNUSED_ARG(sv);
bd61b366 1152 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1153 return 0;
1154}
1155
88e89b8a 1156int
864dbfa3 1157Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1158{
97aff369 1159 dVAR;
65e66c80 1160 PERL_UNUSED_ARG(mg);
b0269e46 1161#if defined(VMS)
cea2e8a9 1162 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1163#else
3280af22 1164 if (PL_localizing) {
fb73857a 1165 HE* entry;
b0269e46 1166 my_clearenv();
fb73857a 1167 hv_iterinit((HV*)sv);
155aba94 1168 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1169 I32 keylen;
1170 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1171 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1172 }
1173 }
1174#endif
1175 return 0;
1176}
1177
1178int
864dbfa3 1179Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1180{
27da23d5 1181 dVAR;
8772537c
AL
1182 PERL_UNUSED_ARG(sv);
1183 PERL_UNUSED_ARG(mg);
b0269e46
AB
1184#if defined(VMS)
1185 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1186#else
1187 my_clearenv();
1188#endif
3e3baf6d 1189 return 0;
66b1d557
HM
1190}
1191
64ca3a65 1192#ifndef PERL_MICRO
2d4fcd5e
AJ
1193#ifdef HAS_SIGPROCMASK
1194static void
1195restore_sigmask(pTHX_ SV *save_sv)
1196{
0bd48802 1197 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1198 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1199}
1200#endif
66b1d557 1201int
864dbfa3 1202Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1203{
97aff369 1204 dVAR;
88e89b8a 1205 /* Are we fetching a signal entry? */
8772537c 1206 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1207 if (i > 0) {
22c35a8c
GS
1208 if(PL_psig_ptr[i])
1209 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1210 else {
46da273f 1211 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1212#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1213 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1214 sigstate = SIG_IGN;
2e34cc90
CL
1215#endif
1216#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1217 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1218 sigstate = SIG_DFL;
85b332e2 1219#endif
88e89b8a 1220 /* cache state so we don't fetch it again */
8aad04aa 1221 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1222 sv_setpvs(sv,"IGNORE");
88e89b8a 1223 else
3280af22 1224 sv_setsv(sv,&PL_sv_undef);
46da273f 1225 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1226 SvTEMP_off(sv);
1227 }
1228 }
1229 return 0;
1230}
1231int
864dbfa3 1232Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1233{
2d4fcd5e
AJ
1234 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1235 * refactoring might be in order.
1236 */
27da23d5 1237 dVAR;
8772537c
AL
1238 register const char * const s = MgPV_nolen_const(mg);
1239 PERL_UNUSED_ARG(sv);
2d4fcd5e 1240 if (*s == '_') {
cbbf8932 1241 SV** svp = NULL;
2d4fcd5e
AJ
1242 if (strEQ(s,"__DIE__"))
1243 svp = &PL_diehook;
b274dc4e 1244 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
2d4fcd5e 1245 svp = &PL_warnhook;
27da23d5 1246 if (svp && *svp) {
b274dc4e 1247 SV *const to_dec = *svp;
cbbf8932 1248 *svp = NULL;
b274dc4e 1249 SvREFCNT_dec(to_dec);
2d4fcd5e
AJ
1250 }
1251 }
1252 else {
2d4fcd5e 1253 /* Are we clearing a signal entry? */
8772537c 1254 const I32 i = whichsig(s);
e02bfb16 1255 if (i > 0) {
2d4fcd5e
AJ
1256#ifdef HAS_SIGPROCMASK
1257 sigset_t set, save;
1258 SV* save_sv;
1259 /* Avoid having the signal arrive at a bad time, if possible. */
1260 sigemptyset(&set);
1261 sigaddset(&set,i);
1262 sigprocmask(SIG_BLOCK, &set, &save);
1263 ENTER;
1264 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1265 SAVEFREESV(save_sv);
1266 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1267#endif
1268 PERL_ASYNC_CHECK();
1269#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1270 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1271#endif
1272#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1273 PL_sig_defaulting[i] = 1;
5c1546dc 1274 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1275#else
8aad04aa 1276 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1277#endif
1278 if(PL_psig_name[i]) {
1279 SvREFCNT_dec(PL_psig_name[i]);
1280 PL_psig_name[i]=0;
1281 }
1282 if(PL_psig_ptr[i]) {
6136c704 1283 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1284 PL_psig_ptr[i]=0;
1285 LEAVE;
1286 SvREFCNT_dec(to_dec);
1287 }
1288 else
1289 LEAVE;
1290 }
88e89b8a
PP
1291 }
1292 return 0;
1293}
3d37d572 1294
acd15b85
CB
1295/*
1296 * The signal handling nomenclature has gotten a bit confusing since the advent of
1297 * safe signals. S_raise_signal only raises signals by analogy with what the
1298 * underlying system's signal mechanism does. It might be more proper to say that
1299 * it defers signals that have already been raised and caught.
1300 *
1301 * PL_sig_pending and PL_psig_pend likewise do not track signals that are pending
1302 * in the sense of being on the system's signal queue in between raising and delivery.
1303 * They are only pending on Perl's deferral list, i.e., they track deferred signals
1304 * awaiting delivery after the current Perl opcode completes and say nothing about
1305 * signals raised but not yet caught in the underlying signal implementation.
1306 */
1307
2563cec5
IZ
1308#ifndef SIG_PENDING_DIE_COUNT
1309# define SIG_PENDING_DIE_COUNT 120
1310#endif
1311
dd374669
AL
1312static void
1313S_raise_signal(pTHX_ int sig)
0a8e0eff 1314{
97aff369 1315 dVAR;
0a8e0eff
NIS
1316 /* Set a flag to say this signal is pending */
1317 PL_psig_pend[sig]++;
1318 /* And one to say _a_ signal is pending */
2563cec5
IZ
1319 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1320 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1321 (unsigned long)SIG_PENDING_DIE_COUNT);
0a8e0eff
NIS
1322}
1323
1324Signal_t
8aad04aa
JH
1325#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1326Perl_csighandler(int sig, ...)
1327#else
0a8e0eff 1328Perl_csighandler(int sig)
8aad04aa 1329#endif
0a8e0eff 1330{
1018e26f
NIS
1331#ifdef PERL_GET_SIG_CONTEXT
1332 dTHXa(PERL_GET_SIG_CONTEXT);
1333#else
85b332e2
CL
1334 dTHX;
1335#endif
23ada85b 1336#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1337 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1338 if (PL_sig_ignoring[sig]) return;
85b332e2 1339#endif
2e34cc90 1340#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1341 if (PL_sig_defaulting[sig])
2e34cc90
CL
1342#ifdef KILL_BY_SIGPRC
1343 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1344#else
1345 exit(1);
1346#endif
1347#endif
853d2c32
RGS
1348 if (
1349#ifdef SIGILL
1350 sig == SIGILL ||
1351#endif
1352#ifdef SIGBUS
1353 sig == SIGBUS ||
1354#endif
1355#ifdef SIGSEGV
1356 sig == SIGSEGV ||
1357#endif
1358 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3
JH
1359 /* Call the perl level handler now--
1360 * with risk we may be in malloc() etc. */
1361 (*PL_sighandlerp)(sig);
1362 else
dd374669 1363 S_raise_signal(aTHX_ sig);
0a8e0eff
NIS
1364}
1365
2e34cc90
CL
1366#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1367void
1368Perl_csighandler_init(void)
1369{
1370 int sig;
27da23d5 1371 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1372
1373 for (sig = 1; sig < SIG_SIZE; sig++) {
1374#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1375 dTHX;
27da23d5 1376 PL_sig_defaulting[sig] = 1;
5c1546dc 1377 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1378#endif
1379#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1380 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1381#endif
1382 }
27da23d5 1383 PL_sig_handlers_initted = 1;
2e34cc90
CL
1384}
1385#endif
1386
0a8e0eff
NIS
1387void
1388Perl_despatch_signals(pTHX)
1389{
97aff369 1390 dVAR;
0a8e0eff
NIS
1391 int sig;
1392 PL_sig_pending = 0;
1393 for (sig = 1; sig < SIG_SIZE; sig++) {
1394 if (PL_psig_pend[sig]) {
25da4428
JH
1395 PERL_BLOCKSIG_ADD(set, sig);
1396 PL_psig_pend[sig] = 0;
1397 PERL_BLOCKSIG_BLOCK(set);
f5203343 1398 (*PL_sighandlerp)(sig);
25da4428 1399 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1400 }
1401 }
1402}
1403
85e6fe83 1404int
864dbfa3 1405Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1406{
27da23d5 1407 dVAR;
79072805 1408 I32 i;
cbbf8932 1409 SV** svp = NULL;
2d4fcd5e
AJ
1410 /* Need to be careful with SvREFCNT_dec(), because that can have side
1411 * effects (due to closures). We must make sure that the new disposition
1412 * is in place before it is called.
1413 */
cbbf8932 1414 SV* to_dec = NULL;
e72dc28c 1415 STRLEN len;
2d4fcd5e
AJ
1416#ifdef HAS_SIGPROCMASK
1417 sigset_t set, save;
1418 SV* save_sv;
1419#endif
a0d0e21e 1420
d5263905 1421 register const char *s = MgPV_const(mg,len);
748a9306
LW
1422 if (*s == '_') {
1423 if (strEQ(s,"__DIE__"))
3280af22 1424 svp = &PL_diehook;
748a9306 1425 else if (strEQ(s,"__WARN__"))
3280af22 1426 svp = &PL_warnhook;
748a9306 1427 else
cea2e8a9 1428 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1429 i = 0;
4633a7c4 1430 if (*svp) {
9289f461
RGS
1431 if (*svp != PERL_WARNHOOK_FATAL)
1432 to_dec = *svp;
cbbf8932 1433 *svp = NULL;
4633a7c4 1434 }
748a9306
LW
1435 }
1436 else {
1437 i = whichsig(s); /* ...no, a brick */
86d86cad 1438 if (i <= 0) {
e476b1b5 1439 if (ckWARN(WARN_SIGNAL))
9014280d 1440 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1441 return 0;
1442 }
2d4fcd5e
AJ
1443#ifdef HAS_SIGPROCMASK
1444 /* Avoid having the signal arrive at a bad time, if possible. */
1445 sigemptyset(&set);
1446 sigaddset(&set,i);
1447 sigprocmask(SIG_BLOCK, &set, &save);
1448 ENTER;
1449 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1450 SAVEFREESV(save_sv);
1451 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1452#endif
1453 PERL_ASYNC_CHECK();
2e34cc90 1454#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1455 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1456#endif
23ada85b 1457#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1458 PL_sig_ignoring[i] = 0;
85b332e2 1459#endif
2e34cc90 1460#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1461 PL_sig_defaulting[i] = 0;
2e34cc90 1462#endif
22c35a8c 1463 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1464 to_dec = PL_psig_ptr[i];
46da273f 1465 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1466 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1467 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1468 SvREADONLY_on(PL_psig_name[i]);
748a9306 1469 }
a0d0e21e 1470 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1471 if (i) {
5c1546dc 1472 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1473#ifdef HAS_SIGPROCMASK
1474 LEAVE;
1475#endif
1476 }
748a9306 1477 else
b37c2d43 1478 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1479 if(to_dec)
1480 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1481 return 0;
1482 }
baf38871 1483 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
748a9306 1484 if (strEQ(s,"IGNORE")) {
85b332e2 1485 if (i) {
23ada85b 1486#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1487 PL_sig_ignoring[i] = 1;
5c1546dc 1488 (void)rsignal(i, PL_csighandlerp);
85b332e2 1489#else
8aad04aa 1490 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1491#endif
2d4fcd5e 1492 }
748a9306
LW
1493 }
1494 else if (strEQ(s,"DEFAULT") || !*s) {
1495 if (i)
2e34cc90
CL
1496#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1497 {
27da23d5 1498 PL_sig_defaulting[i] = 1;
5c1546dc 1499 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1500 }
1501#else
8aad04aa 1502 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1503#endif
748a9306 1504 }
79072805 1505 else {
5aabfad6
PP
1506 /*
1507 * We should warn if HINT_STRICT_REFS, but without
1508 * access to a known hint bit in a known OP, we can't
1509 * tell whether HINT_STRICT_REFS is in force or not.
1510 */
46fc3d4c 1511 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1512 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1513 if (i)
5c1546dc 1514 (void)rsignal(i, PL_csighandlerp);
748a9306 1515 else
46da273f 1516 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1517 }
2d4fcd5e
AJ
1518#ifdef HAS_SIGPROCMASK
1519 if(i)
1520 LEAVE;
1521#endif
1522 if(to_dec)
1523 SvREFCNT_dec(to_dec);
79072805
LW
1524 return 0;
1525}
64ca3a65 1526#endif /* !PERL_MICRO */
79072805
LW
1527
1528int
864dbfa3 1529Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1530{
97aff369 1531 dVAR;
8772537c 1532 PERL_UNUSED_ARG(sv);
e1a479c5
BB
1533
1534 /* The first case occurs via setisa,
1535 the second via setisa_elem, which
1536 calls this same magic */
1537 mro_isa_changed_in(
1538 GvSTASH(
1539 SvTYPE(mg->mg_obj) == SVt_PVGV
1540 ? (GV*)mg->mg_obj
1541 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
1542 )
1543 );
1544
463ee0b2
LW
1545 return 0;
1546}
1547
1548int
864dbfa3 1549Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1550{
97aff369 1551 dVAR;
8772537c
AL
1552 PERL_UNUSED_ARG(sv);
1553 PERL_UNUSED_ARG(mg);
3280af22 1554 PL_amagic_generation++;
463ee0b2 1555
a0d0e21e
LW
1556 return 0;
1557}
463ee0b2 1558
946ec16e 1559int
864dbfa3 1560Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1561{
dd374669 1562 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1563 I32 i = 0;
8772537c 1564 PERL_UNUSED_ARG(mg);
7719e241 1565
6ff81951 1566 if (hv) {
497b47a8
JH
1567 (void) hv_iterinit(hv);
1568 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1569 i = HvKEYS(hv);
1570 else {
1571 while (hv_iternext(hv))
1572 i++;
1573 }
6ff81951
GS
1574 }
1575
1576 sv_setiv(sv, (IV)i);
1577 return 0;
1578}
1579
1580int
864dbfa3 1581Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1582{
8772537c 1583 PERL_UNUSED_ARG(mg);
946ec16e
PP
1584 if (LvTARG(sv)) {
1585 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1586 }
1587 return 0;
ac27b0f5 1588}
946ec16e 1589
e336de0d 1590/* caller is responsible for stack switching/cleanup */
565764a8 1591STATIC int
e1ec3a88 1592S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1593{
97aff369 1594 dVAR;
a0d0e21e 1595 dSP;
463ee0b2 1596
924508f0
GS
1597 PUSHMARK(SP);
1598 EXTEND(SP, n);
33c27489 1599 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1600 if (n > 1) {
93965878 1601 if (mg->mg_ptr) {
565764a8 1602 if (mg->mg_len >= 0)
79cb57f6 1603 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1604 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1605 PUSHs((SV*)mg->mg_ptr);
1606 }
14befaf4 1607 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1608 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1609 }
1610 }
1611 if (n > 2) {
1612 PUSHs(val);
88e89b8a 1613 }
463ee0b2
LW
1614 PUTBACK;
1615
864dbfa3 1616 return call_method(meth, flags);
946ec16e
PP
1617}
1618
76e3520e 1619STATIC int
e1ec3a88 1620S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1621{
27da23d5 1622 dVAR; dSP;
463ee0b2 1623
a0d0e21e
LW
1624 ENTER;
1625 SAVETMPS;
e788e7d3 1626 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1627
33c27489 1628 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1629 sv_setsv(sv, *PL_stack_sp--);
93965878 1630 }
463ee0b2 1631
d3acc0f7 1632 POPSTACK;
a0d0e21e
LW
1633 FREETMPS;
1634 LEAVE;
1635 return 0;
1636}
463ee0b2 1637
a0d0e21e 1638int
864dbfa3 1639Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1640{
a0d0e21e
LW
1641 if (mg->mg_ptr)
1642 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1643 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1644 return 0;
1645}
1646
1647int
864dbfa3 1648Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1649{
27da23d5 1650 dVAR; dSP;
a60c0954 1651 ENTER;
e788e7d3 1652 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1653 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1654 POPSTACK;
a60c0954 1655 LEAVE;
463ee0b2
LW
1656 return 0;
1657}
1658
1659int
864dbfa3 1660Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1661{
a0d0e21e
LW
1662 return magic_methpack(sv,mg,"DELETE");
1663}
463ee0b2 1664
93965878
NIS
1665
1666U32
864dbfa3 1667Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1668{
27da23d5 1669 dVAR; dSP;
22846ab4 1670 I32 retval = 0;
93965878
NIS
1671
1672 ENTER;
1673 SAVETMPS;
e788e7d3 1674 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1675 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1676 sv = *PL_stack_sp--;
22846ab4
AB
1677 retval = SvIV(sv)-1;
1678 if (retval < -1)
1679 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1680 }
d3acc0f7 1681 POPSTACK;
93965878
NIS
1682 FREETMPS;
1683 LEAVE;
22846ab4 1684 return (U32) retval;
93965878
NIS
1685}
1686
cea2e8a9
GS
1687int
1688Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1689{
27da23d5 1690 dVAR; dSP;
463ee0b2 1691
e336de0d 1692 ENTER;
e788e7d3 1693 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1694 PUSHMARK(SP);
33c27489 1695 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1696 PUTBACK;
864dbfa3 1697 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1698 POPSTACK;
a60c0954 1699 LEAVE;
a3bcc51e 1700
463ee0b2
LW
1701 return 0;
1702}
1703
1704int
864dbfa3 1705Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1706{
27da23d5 1707 dVAR; dSP;
666ea192 1708 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1709
1710 ENTER;
a0d0e21e 1711 SAVETMPS;
e788e7d3 1712 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1713 PUSHMARK(SP);
1714 EXTEND(SP, 2);
33c27489 1715 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1716 if (SvOK(key))
1717 PUSHs(key);
1718 PUTBACK;
1719
864dbfa3 1720 if (call_method(meth, G_SCALAR))
3280af22 1721 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1722
d3acc0f7 1723 POPSTACK;
a0d0e21e
LW
1724 FREETMPS;
1725 LEAVE;
79072805
LW
1726 return 0;
1727}
1728
1729int
1146e912 1730Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1731{
1732 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1733}
a0d0e21e 1734
a3bcc51e
TP
1735SV *
1736Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1737{
27da23d5 1738 dVAR; dSP;
5fcbf73d 1739 SV *retval;
8772537c
AL
1740 SV * const tied = SvTIED_obj((SV*)hv, mg);
1741 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1742
1743 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1744 SV *key;
bfcb3514 1745 if (HvEITER_get(hv))
a3bcc51e
TP
1746 /* we are in an iteration so the hash cannot be empty */
1747 return &PL_sv_yes;
1748 /* no xhv_eiter so now use FIRSTKEY */
1749 key = sv_newmortal();
1750 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1751 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1752 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1753 }
1754
1755 /* there is a SCALAR method that we can call */
1756 ENTER;
1757 PUSHSTACKi(PERLSI_MAGIC);
1758 PUSHMARK(SP);
1759 EXTEND(SP, 1);
1760 PUSHs(tied);
1761 PUTBACK;
1762
1763 if (call_method("SCALAR", G_SCALAR))
1764 retval = *PL_stack_sp--;
5fcbf73d
AL
1765 else
1766 retval = &PL_sv_undef;
a3bcc51e
TP
1767 POPSTACK;
1768 LEAVE;
1769 return retval;
1770}
1771
a0d0e21e 1772int
864dbfa3 1773Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1774{
97aff369 1775 dVAR;
8772537c
AL
1776 GV * const gv = PL_DBline;
1777 const I32 i = SvTRUE(sv);
1778 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1779 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1780 if (svp && SvIOKp(*svp)) {
1781 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1782 if (o) {
1783 /* set or clear breakpoint in the relevant control op */
1784 if (i)
1785 o->op_flags |= OPf_SPECIAL;
1786 else
1787 o->op_flags &= ~OPf_SPECIAL;
1788 }
5df8de69 1789 }
79072805
LW
1790 return 0;
1791}
1792
1793int
8772537c 1794Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1795{
97aff369 1796 dVAR;
8772537c 1797 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1798 if (obj) {
fc15ae8f 1799 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1800 } else {
1801 SvOK_off(sv);
1802 }
79072805
LW
1803 return 0;
1804}
1805
1806int
864dbfa3 1807Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1808{
97aff369 1809 dVAR;
8772537c 1810 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1811 if (obj) {
fc15ae8f 1812 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1813 } else {
1814 if (ckWARN(WARN_MISC))
1815 Perl_warner(aTHX_ packWARN(WARN_MISC),
1816 "Attempt to set length of freed array");
1817 }
1818 return 0;
1819}
1820
1821int
1822Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1823{
97aff369 1824 dVAR;
53c1dcc0 1825 PERL_UNUSED_ARG(sv);
94f3782b
DM
1826 /* during global destruction, mg_obj may already have been freed */
1827 if (PL_in_clean_all)
1ea47f64 1828 return 0;
94f3782b 1829
83bf042f
NC
1830 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1831
1832 if (mg) {
1833 /* arylen scalar holds a pointer back to the array, but doesn't own a
1834 reference. Hence the we (the array) are about to go away with it
1835 still pointing at us. Clear its pointer, else it would be pointing
1836 at free memory. See the comment in sv_magic about reference loops,
1837 and why it can't own a reference to us. */
1838 mg->mg_obj = 0;
1839 }
a0d0e21e
LW
1840 return 0;
1841}
1842
1843int
864dbfa3 1844Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1845{
97aff369 1846 dVAR;
8772537c 1847 SV* const lsv = LvTARG(sv);
3881461a 1848 PERL_UNUSED_ARG(mg);
ac27b0f5 1849
a0d0e21e 1850 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1851 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1852 if (found && found->mg_len >= 0) {
1853 I32 i = found->mg_len;
7e2040f0 1854 if (DO_UTF8(lsv))
a0ed51b3 1855 sv_pos_b2u(lsv, &i);
fc15ae8f 1856 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1857 return 0;
1858 }
1859 }
0c34ef67 1860 SvOK_off(sv);
a0d0e21e
LW
1861 return 0;
1862}
1863
1864int
864dbfa3 1865Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1866{
97aff369 1867 dVAR;
8772537c 1868 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1869 SSize_t pos;
1870 STRLEN len;
c00206c8 1871 STRLEN ulen = 0;
53d44271 1872 MAGIC* found;
a0d0e21e 1873
3881461a 1874 PERL_UNUSED_ARG(mg);
ac27b0f5 1875
a0d0e21e 1876 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1877 found = mg_find(lsv, PERL_MAGIC_regex_global);
1878 else
1879 found = NULL;
1880 if (!found) {
a0d0e21e
LW
1881 if (!SvOK(sv))
1882 return 0;
d83f0a82
NC
1883#ifdef PERL_OLD_COPY_ON_WRITE
1884 if (SvIsCOW(lsv))
1885 sv_force_normal_flags(lsv, 0);
1886#endif
3881461a 1887 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1888 NULL, 0);
a0d0e21e
LW
1889 }
1890 else if (!SvOK(sv)) {
3881461a 1891 found->mg_len = -1;
a0d0e21e
LW
1892 return 0;
1893 }
1894 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1895
fc15ae8f 1896 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1897
7e2040f0 1898 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1899 ulen = sv_len_utf8(lsv);
1900 if (ulen)
1901 len = ulen;
a0ed51b3
LW
1902 }
1903
a0d0e21e
LW
1904 if (pos < 0) {
1905 pos += len;
1906 if (pos < 0)
1907 pos = 0;
1908 }
eb160463 1909 else if (pos > (SSize_t)len)
a0d0e21e 1910 pos = len;
a0ed51b3
LW
1911
1912 if (ulen) {
1913 I32 p = pos;
1914 sv_pos_u2b(lsv, &p, 0);
1915 pos = p;
1916 }
727405f8 1917
3881461a
AL
1918 found->mg_len = pos;
1919 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1920
79072805
LW
1921 return 0;
1922}
1923
1924int
864dbfa3 1925Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1926{
79072805 1927 GV* gv;
8772537c
AL
1928 PERL_UNUSED_ARG(mg);
1929
dd69841b
BB
1930 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1931
79072805
LW
1932 if (!SvOK(sv))
1933 return 0;
2e5b91de 1934 if (isGV_with_GP(sv)) {
180488f8
NC
1935 /* We're actually already a typeglob, so don't need the stuff below.
1936 */
1937 return 0;
1938 }
f776e3cd 1939 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1940 if (sv == (SV*)gv)
1941 return 0;
1942 if (GvGP(sv))
88e89b8a 1943 gp_free((GV*)sv);
79072805 1944 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1945 return 0;
1946}
1947
1948int
864dbfa3 1949Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1950{
1951 STRLEN len;
35a4481c 1952 SV * const lsv = LvTARG(sv);
b83604b4 1953 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1954 I32 offs = LvTARGOFF(sv);
1955 I32 rem = LvTARGLEN(sv);
8772537c 1956 PERL_UNUSED_ARG(mg);
6ff81951 1957
9aa983d2
JH
1958 if (SvUTF8(lsv))
1959 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1960 if (offs > (I32)len)
6ff81951 1961 offs = len;
eb160463 1962 if (rem + offs > (I32)len)
6ff81951
GS
1963 rem = len - offs;
1964 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1965 if (SvUTF8(lsv))
2ef4b674 1966 SvUTF8_on(sv);
6ff81951
GS
1967 return 0;
1968}
1969
1970int
864dbfa3 1971Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1972{
97aff369 1973 dVAR;
9aa983d2 1974 STRLEN len;
5fcbf73d 1975 const char * const tmps = SvPV_const(sv, len);
dd374669 1976 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1977 I32 lvoff = LvTARGOFF(sv);
1978 I32 lvlen = LvTARGLEN(sv);
8772537c 1979 PERL_UNUSED_ARG(mg);
075a4a2b 1980
1aa99e6b 1981 if (DO_UTF8(sv)) {
9aa983d2
JH
1982 sv_utf8_upgrade(lsv);
1983 sv_pos_u2b(lsv, &lvoff, &lvlen);
1984 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1985 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1986 SvUTF8_on(lsv);
1987 }
9bf12eaf 1988 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1989 const char *utf8;
9aa983d2 1990 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1991 LvTARGLEN(sv) = len;
5fcbf73d
AL
1992 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1993 sv_insert(lsv, lvoff, lvlen, utf8, len);
1994 Safefree(utf8);
1aa99e6b 1995 }
b76f3ce2
GB
1996 else {
1997 sv_insert(lsv, lvoff, lvlen, tmps, len);
1998 LvTARGLEN(sv) = len;
1999 }
2000
1aa99e6b 2001
79072805
LW
2002 return 0;
2003}
2004
2005int
864dbfa3 2006Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2007{
97aff369 2008 dVAR;
8772537c 2009 PERL_UNUSED_ARG(sv);
27cc343c 2010 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2011 return 0;
2012}
2013
2014int
864dbfa3 2015Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2016{
97aff369 2017 dVAR;
8772537c 2018 PERL_UNUSED_ARG(sv);
b01e650a
DM
2019 /* update taint status */
2020 if (PL_tainted)
2021 mg->mg_len |= 1;
2022 else
2023 mg->mg_len &= ~1;
463ee0b2
LW
2024 return 0;
2025}
2026
2027int
864dbfa3 2028Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2029{
35a4481c 2030 SV * const lsv = LvTARG(sv);
8772537c 2031 PERL_UNUSED_ARG(mg);
6ff81951 2032
6136c704
AL
2033 if (lsv)
2034 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2035 else
0c34ef67 2036 SvOK_off(sv);
6ff81951 2037
6ff81951
GS
2038 return 0;
2039}
2040
2041int
864dbfa3 2042Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2043{
8772537c 2044 PERL_UNUSED_ARG(mg);
79072805
LW
2045 do_vecset(sv); /* XXX slurp this routine */
2046 return 0;
2047}
2048
2049int
864dbfa3 2050Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2051{
97aff369 2052 dVAR;
a0714e2c 2053 SV *targ = NULL;
5f05dabc 2054 if (LvTARGLEN(sv)) {
68dc0745 2055 if (mg->mg_obj) {
8772537c
AL
2056 SV * const ahv = LvTARG(sv);
2057 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2058 if (he)
2059 targ = HeVAL(he);
68dc0745
PP
2060 }
2061 else {
8772537c 2062 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2063 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2064 targ = AvARRAY(av)[LvTARGOFF(sv)];
2065 }
46da273f 2066 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2067 /* somebody else defined it for us */
2068 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2069 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2070 LvTARGLEN(sv) = 0;
2071 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2072 mg->mg_obj = NULL;
68dc0745
PP
2073 mg->mg_flags &= ~MGf_REFCOUNTED;
2074 }
5f05dabc 2075 }
71be2cbc
PP
2076 else
2077 targ = LvTARG(sv);
3280af22 2078 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2079 return 0;
2080}
2081
2082int
864dbfa3 2083Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2084{
8772537c 2085 PERL_UNUSED_ARG(mg);
71be2cbc 2086 if (LvTARGLEN(sv))
68dc0745
PP
2087 vivify_defelem(sv);
2088 if (LvTARG(sv)) {
5f05dabc 2089 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2090 SvSETMAGIC(LvTARG(sv));
2091 }
5f05dabc
PP
2092 return 0;
2093}
2094
71be2cbc 2095void
864dbfa3 2096Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2097{
97aff369 2098 dVAR;
74e13ce4 2099 MAGIC *mg;
a0714e2c 2100 SV *value = NULL;
71be2cbc 2101
14befaf4 2102 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2103 return;
68dc0745 2104 if (mg->mg_obj) {
8772537c
AL
2105 SV * const ahv = LvTARG(sv);
2106 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2107 if (he)
2108 value = HeVAL(he);
3280af22 2109 if (!value || value == &PL_sv_undef)
be2597df 2110 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2111 }
68dc0745 2112 else {
8772537c 2113 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2114 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2115 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2116 else {
d4c19fe8 2117 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2118 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2119 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2120 }
2121 }
b37c2d43 2122 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2123 SvREFCNT_dec(LvTARG(sv));
2124 LvTARG(sv) = value;
71be2cbc 2125 LvTARGLEN(sv) = 0;
68dc0745 2126 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2127 mg->mg_obj = NULL;
68dc0745 2128 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2129}
2130
2131int
864dbfa3 2132Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2133{
86f55936 2134 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2135}
2136
2137int
864dbfa3 2138Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2139{
96a5add6 2140 PERL_UNUSED_CONTEXT;
565764a8 2141 mg->mg_len = -1;
c6496cc7 2142 SvSCREAM_off(sv);
93a17b20
LW
2143 return 0;
2144}
2145
2146int
864dbfa3 2147Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2148{
8772537c 2149 PERL_UNUSED_ARG(mg);
14befaf4 2150 sv_unmagic(sv, PERL_MAGIC_bm);
b84d1fce 2151 SvTAIL_off(sv);
79072805
LW
2152 SvVALID_off(sv);
2153 return 0;
2154}
2155
2156int
864dbfa3 2157Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2158{
8772537c 2159 PERL_UNUSED_ARG(mg);
14befaf4 2160 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2161 SvCOMPILED_off(sv);
2162 return 0;
2163}
2164
2165int
864dbfa3 2166Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2167{
35a4481c 2168 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2169
2170 if (uf && uf->uf_set)
24f81a43 2171 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2172 return 0;
2173}
2174
c277df42 2175int
faf82a0b
AE
2176Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2177{
8772537c 2178 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2179 sv_unmagic(sv, PERL_MAGIC_qr);
2180 return 0;
2181}
2182
2183int
864dbfa3 2184Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2185{
97aff369 2186 dVAR;
8772537c
AL
2187 regexp * const re = (regexp *)mg->mg_obj;
2188 PERL_UNUSED_ARG(sv);
2189
c277df42
IZ
2190 ReREFCNT_dec(re);
2191 return 0;
2192}
2193
7a4c00b4 2194#ifdef USE_LOCALE_COLLATE
79072805 2195int
864dbfa3 2196Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2197{
2198 /*
838b5b74 2199 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2200 * and vanished with a faint plop.
2201 */
96a5add6 2202 PERL_UNUSED_CONTEXT;
8772537c 2203 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2204 if (mg->mg_ptr) {
2205 Safefree(mg->mg_ptr);
2206 mg->mg_ptr = NULL;
565764a8 2207 mg->mg_len = -1;
7a4c00b4 2208 }
bbce6d69
PP
2209 return 0;
2210}
7a4c00b4 2211#endif /* USE_LOCALE_COLLATE */
bbce6d69 2212
7e8c5dac
HS
2213/* Just clear the UTF-8 cache data. */
2214int
2215Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2216{
96a5add6 2217 PERL_UNUSED_CONTEXT;
8772537c 2218 PERL_UNUSED_ARG(sv);
7e8c5dac 2219 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2220 mg->mg_ptr = NULL;
7e8c5dac
HS
2221 mg->mg_len = -1; /* The mg_len holds the len cache. */
2222 return 0;
2223}
2224
bbce6d69 2225int
864dbfa3 2226Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2227{
97aff369 2228 dVAR;
e1ec3a88 2229 register const char *s;
79072805 2230 I32 i;
8990e307 2231 STRLEN len;
79072805 2232 switch (*mg->mg_ptr) {
748a9306 2233 case '\001': /* ^A */
3280af22 2234 sv_setsv(PL_bodytarget, sv);
748a9306 2235 break;
49460fe6 2236 case '\003': /* ^C */
38ab35f8 2237 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2238 break;
2239
79072805 2240 case '\004': /* ^D */
b4ab917c 2241#ifdef DEBUGGING
b83604b4 2242 s = SvPV_nolen_const(sv);
ddcf8bc1 2243 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2244 DEBUG_x(dump_all());
b4ab917c 2245#else
38ab35f8 2246 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2247#endif
79072805 2248 break;
28f23441 2249 case '\005': /* ^E */
d0063567 2250 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2251#ifdef MACOS_TRADITIONAL
38ab35f8 2252 gMacPerl_OSErr = SvIV(sv);
28f23441 2253#else
cd39f2b6 2254# ifdef VMS
38ab35f8 2255 set_vaxc_errno(SvIV(sv));
048c1ddf 2256# else
cd39f2b6 2257# ifdef WIN32
d0063567 2258 SetLastError( SvIV(sv) );
cd39f2b6 2259# else
9fed8b87 2260# ifdef OS2
38ab35f8 2261 os2_setsyserrno(SvIV(sv));
9fed8b87 2262# else
d0063567 2263 /* will anyone ever use this? */
38ab35f8 2264 SETERRNO(SvIV(sv), 4);
cd39f2b6 2265# endif
048c1ddf
IZ
2266# endif
2267# endif
22fae026 2268#endif
d0063567
DK
2269 }
2270 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2271 if (PL_encoding)
2272 SvREFCNT_dec(PL_encoding);
2273 if (SvOK(sv) || SvGMAGICAL(sv)) {
2274 PL_encoding = newSVsv(sv);
2275 }
2276 else {
a0714e2c 2277 PL_encoding = NULL;
d0063567
DK
2278 }
2279 }
2280 break;
79072805 2281 case '\006': /* ^F */
38ab35f8 2282 PL_maxsysfd = SvIV(sv);
79072805 2283 break;
a0d0e21e 2284 case '\010': /* ^H */
38ab35f8 2285 PL_hints = SvIV(sv);
a0d0e21e 2286 break;
9d116dd7 2287 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2288 Safefree(PL_inplace);
bd61b366 2289 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2290 break;
28f23441 2291 case '\017': /* ^O */
ac27b0f5 2292 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2293 Safefree(PL_osname);
bd61b366 2294 PL_osname = NULL;
3511154c
DM
2295 if (SvOK(sv)) {
2296 TAINT_PROPER("assigning to $^O");
2e0de35c 2297 PL_osname = savesvpv(sv);
3511154c 2298 }
ac27b0f5
NIS
2299 }
2300 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2301 STRLEN len;
2302 const char *const start = SvPV(sv, len);
b54fc2b6 2303 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2304 SV *tmp;
2305 struct refcounted_he *tmp_he;
2306
2307
2308 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2309 PL_hints
2310 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2311
2312 /* Opening for input is more common than opening for output, so
2313 ensure that hints for input are sooner on linked list. */
2314 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2315 : newSVpvs(""));
2316 SvFLAGS(tmp) |= SvUTF8(sv);
2317
2318 tmp_he
2319 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2320 sv_2mortal(newSVpvs("open>")), tmp);
2321
2322 /* The UTF-8 setting is carried over */
2323 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2324
11bcd5da 2325 PL_compiling.cop_hints_hash
8b850bd5
NC
2326 = Perl_refcounted_he_new(aTHX_ tmp_he,
2327 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2328 }
28f23441 2329 break;
79072805 2330 case '\020': /* ^P */
38ab35f8 2331 PL_perldb = SvIV(sv);
f2a7f298 2332 if (PL_perldb && !PL_DBsingle)
1ee4443e 2333 init_debugger();
79072805
LW
2334 break;
2335 case '\024': /* ^T */
88e89b8a 2336#ifdef BIG_TIME
6b88bc9c 2337 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2338#else
38ab35f8 2339 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2340#endif
79072805 2341 break;
e07ea26a
NC
2342 case '\025': /* ^UTF8CACHE */
2343 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2344 PL_utf8cache = (signed char) sv_2iv(sv);
2345 }
2346 break;
fde18df1 2347 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2348 if (*(mg->mg_ptr+1) == '\0') {
2349 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2350 i = SvIV(sv);
ac27b0f5 2351 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2352 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2353 }
599cee73 2354 }
0a378802 2355 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2356 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2357 if (!SvPOK(sv) && PL_localizing) {
2358 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2359 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2360 break;
2361 }
f4fc7782 2362 {
b5477537 2363 STRLEN len, i;
d3a7d8c7 2364 int accumulate = 0 ;
f4fc7782 2365 int any_fatals = 0 ;
b83604b4 2366 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2367 for (i = 0 ; i < len ; ++i) {
2368 accumulate |= ptr[i] ;
2369 any_fatals |= (ptr[i] & 0xAA) ;
2370 }
4243c432
NC
2371 if (!accumulate) {
2372 if (!specialWARN(PL_compiling.cop_warnings))
2373 PerlMemShared_free(PL_compiling.cop_warnings);
2374 PL_compiling.cop_warnings = pWARN_NONE;
2375 }
72dc9ed5
NC
2376 /* Yuck. I can't see how to abstract this: */
2377 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2378 WARN_ALL) && !any_fatals) {
4243c432
NC
2379 if (!specialWARN(PL_compiling.cop_warnings))
2380 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2381 PL_compiling.cop_warnings = pWARN_ALL;
2382 PL_dowarn |= G_WARN_ONCE ;
727405f8 2383 }
d3a7d8c7 2384 else {
72dc9ed5
NC
2385 STRLEN len;
2386 const char *const p = SvPV_const(sv, len);
2387
2388 PL_compiling.cop_warnings
8ee4cf24 2389 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2390 p, len);
2391
d3a7d8c7
GS
2392 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2393 PL_dowarn |= G_WARN_ONCE ;
2394 }
f4fc7782 2395
d3a7d8c7 2396 }
4438c4b7 2397 }
971a9dd3 2398 }
79072805
LW
2399 break;
2400 case '.':
3280af22
NIS
2401 if (PL_localizing) {
2402 if (PL_localizing == 1)
7766f137 2403 SAVESPTR(PL_last_in_gv);
748a9306 2404 }
3280af22 2405 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2406 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2407 break;
2408 case '^':
3280af22 2409 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2410 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2411 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2412 break;
2413 case '~':
3280af22 2414 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2415 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2416 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2417 break;
2418 case '=':
38ab35f8 2419 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2420 break;
2421 case '-':
38ab35f8 2422 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2423 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2424 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2425 break;
2426 case '%':
38ab35f8 2427 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2428 break;
2429 case '|':
4b65379b 2430 {
8772537c 2431 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2432 if(!io)
2433 break;
38ab35f8 2434 if ((SvIV(sv)) == 0)
4b65379b
CS
2435 IoFLAGS(io) &= ~IOf_FLUSH;
2436 else {
2437 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2438 PerlIO *ofp = IoOFP(io);
2439 if (ofp)
2440 (void)PerlIO_flush(ofp);
2441 IoFLAGS(io) |= IOf_FLUSH;
2442 }
2443 }
79072805
LW
2444 }
2445 break;
79072805 2446 case '/':
3280af22 2447 SvREFCNT_dec(PL_rs);
8bfdd7d9 2448 PL_rs = newSVsv(sv);
79072805
LW
2449 break;
2450 case '\\':
7889fe52
NIS
2451 if (PL_ors_sv)
2452 SvREFCNT_dec(PL_ors_sv);
009c130f 2453 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2454 PL_ors_sv = newSVsv(sv);
009c130f 2455 }
e3c19b7b 2456 else {
a0714e2c 2457 PL_ors_sv = NULL;
e3c19b7b 2458 }
79072805
LW
2459 break;
2460 case ',':
7889fe52
NIS
2461 if (PL_ofs_sv)
2462 SvREFCNT_dec(PL_ofs_sv);
2463 if (SvOK(sv) || SvGMAGICAL(sv)) {
2464 PL_ofs_sv = newSVsv(sv);
2465 }
2466 else {
a0714e2c 2467 PL_ofs_sv = NULL;
7889fe52 2468 }
79072805 2469 break;
79072805 2470 case '[':
38ab35f8 2471 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2472 break;
2473 case '?':
ff0cee69 2474#ifdef COMPLEX_STATUS
6b88bc9c
GS
2475 if (PL_localizing == 2) {
2476 PL_statusvalue = LvTARGOFF(sv);
2477 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2478 }
2479 else
2480#endif
2481#ifdef VMSISH_STATUS
2482 if (VMSISH_STATUS)
fb38d079 2483 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2484 else
2485#endif
38ab35f8 2486 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2487 break;
2488 case '!':
93189314
JH
2489 {
2490#ifdef VMS
2491# define PERL_VMS_BANG vaxc$errno
2492#else
2493# define PERL_VMS_BANG 0
2494#endif
91487cfc 2495 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2496 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2497 }
79072805
LW
2498 break;
2499 case '<':
38ab35f8 2500 PL_uid = SvIV(sv);
3280af22
NIS
2501 if (PL_delaymagic) {
2502 PL_delaymagic |= DM_RUID;
79072805
LW
2503 break; /* don't do magic till later */
2504 }
2505#ifdef HAS_SETRUID
b28d0864 2506 (void)setruid((Uid_t)PL_uid);
79072805
LW
2507#else
2508#ifdef HAS_SETREUID
3280af22 2509 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2510#else
85e6fe83 2511#ifdef HAS_SETRESUID
b28d0864 2512 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2513#else
75870ed3 2514 if (PL_uid == PL_euid) { /* special case $< = $> */
2515#ifdef PERL_DARWIN
2516 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2517 if (PL_uid != 0 && PerlProc_getuid() == 0)
2518 (void)PerlProc_setuid(0);
2519#endif
b28d0864 2520 (void)PerlProc_setuid(PL_uid);
75870ed3 2521 } else {
d8eceb89 2522 PL_uid = PerlProc_getuid();
cea2e8a9 2523 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2524 }
79072805
LW
2525#endif
2526#endif
85e6fe83 2527#endif
d8eceb89 2528 PL_uid = PerlProc_getuid();
3280af22 2529 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2530 break;
2531 case '>':
38ab35f8 2532 PL_euid = SvIV(sv);
3280af22
NIS
2533 if (PL_delaymagic) {
2534 PL_delaymagic |= DM_EUID;
79072805
LW
2535 break; /* don't do magic till later */
2536 }
2537#ifdef HAS_SETEUID
3280af22 2538 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2539#else
2540#ifdef HAS_SETREUID
b28d0864 2541 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2542#else
2543#ifdef HAS_SETRESUID
6b88bc9c 2544 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2545#else
b28d0864
NIS
2546 if (PL_euid == PL_uid) /* special case $> = $< */
2547 PerlProc_setuid(PL_euid);
a0d0e21e 2548 else {
e8ee3774 2549 PL_euid = PerlProc_geteuid();
cea2e8a9 2550 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2551 }
79072805
LW
2552#endif
2553#endif
85e6fe83 2554#endif
d8eceb89 2555 PL_euid = PerlProc_geteuid();
3280af22 2556 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2557 break;
2558 case '(':
38ab35f8 2559 PL_gid = SvIV(sv);
3280af22
NIS
2560 if (PL_delaymagic) {
2561 PL_delaymagic |= DM_RGID;
79072805
LW
2562 break; /* don't do magic till later */
2563 }
2564#ifdef HAS_SETRGID
b28d0864 2565 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2566#else
2567#ifdef HAS_SETREGID
3280af22 2568 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2569#else
2570#ifdef HAS_SETRESGID
b28d0864 2571 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2572#else
b28d0864
NIS
2573 if (PL_gid == PL_egid) /* special case $( = $) */
2574 (void)PerlProc_setgid(PL_gid);
748a9306 2575 else {
d8eceb89 2576 PL_gid = PerlProc_getgid();
cea2e8a9 2577 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2578 }
79072805
LW
2579#endif
2580#endif
85e6fe83 2581#endif
d8eceb89 2582 PL_gid = PerlProc_getgid();
3280af22 2583 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2584 break;
2585 case ')':
5cd24f17
PP
2586#ifdef HAS_SETGROUPS
2587 {
b83604b4 2588 const char *p = SvPV_const(sv, len);
757f63d8
SP
2589 Groups_t *gary = NULL;
2590
2591 while (isSPACE(*p))
2592 ++p;
2593 PL_egid = Atol(p);
2594 for (i = 0; i < NGROUPS; ++i) {
2595 while (*p && !isSPACE(*p))
2596 ++p;
2597 while (isSPACE(*p))
2598 ++p;
2599 if (!*p)
2600 break;
2601 if(!gary)
2602 Newx(gary, i + 1, Groups_t);
2603 else
2604 Renew(gary, i + 1, Groups_t);
2605 gary[i] = Atol(p);
2606 }
2607 if (i)
2608 (void)setgroups(i, gary);
f5a63d97 2609 Safefree(gary);
5cd24f17
PP
2610 }
2611#else /* HAS_SETGROUPS */
38ab35f8 2612 PL_egid = SvIV(sv);
5cd24f17 2613#endif /* HAS_SETGROUPS */
3280af22
NIS
2614 if (PL_delaymagic) {
2615 PL_delaymagic |= DM_EGID;
79072805
LW
2616 break; /* don't do magic till later */
2617 }
2618#ifdef HAS_SETEGID
3280af22 2619 (void)setegid((Gid_t)PL_egid);
79072805
LW
2620#else
2621#ifdef HAS_SETREGID
b28d0864 2622 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2623#else
2624#ifdef HAS_SETRESGID
b28d0864 2625 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2626#else
b28d0864
NIS
2627 if (PL_egid == PL_gid) /* special case $) = $( */
2628 (void)PerlProc_setgid(PL_egid);
748a9306 2629 else {
d8eceb89 2630 PL_egid = PerlProc_getegid();
cea2e8a9 2631 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2632 }
79072805
LW
2633#endif
2634#endif
85e6fe83 2635#endif
d8eceb89 2636 PL_egid = PerlProc_getegid();
3280af22 2637 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2638 break;
2639 case ':':
2d8e6c8d 2640 PL_chopset = SvPV_force(sv,len);
79072805 2641 break;
cd39f2b6 2642#ifndef MACOS_TRADITIONAL
79072805 2643 case '0':
e2975953 2644 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2645#ifdef HAS_SETPROCTITLE
2646 /* The BSDs don't show the argv[] in ps(1) output, they
2647 * show a string from the process struct and provide
2648 * the setproctitle() routine to manipulate that. */
a2722ac9 2649 if (PL_origalen != 1) {
b83604b4 2650 s = SvPV_const(sv, len);
98b76f99 2651# if __FreeBSD_version > 410001
9aad2c0e 2652 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2653 * but not the "(perl) suffix from the ps(1)
2654 * output, because that's what ps(1) shows if the
2655 * argv[] is modified. */
6f2ad931 2656 setproctitle("-%s", s);
9aad2c0e 2657# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2658 /* This doesn't really work if you assume that
2659 * $0 = 'foobar'; will wipe out 'perl' from the $0
2660 * because in ps(1) output the result will be like
2661 * sprintf("perl: %s (perl)", s)
2662 * I guess this is a security feature:
2663 * one (a user process) cannot get rid of the original name.
2664 * --jhi */
2665 setproctitle("%s", s);
2666# endif
2667 }
9d3968b2 2668#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2669 if (PL_origalen != 1) {
17aa7f3d 2670 union pstun un;
b83604b4 2671 s = SvPV_const(sv, len);
6867be6d 2672 un.pst_command = (char *)s;
17aa7f3d
JH
2673 pstat(PSTAT_SETCMD, un, len, 0, 0);
2674 }
9d3968b2 2675#else
2d2af554
GA
2676 if (PL_origalen > 1) {
2677 /* PL_origalen is set in perl_parse(). */
2678 s = SvPV_force(sv,len);
2679 if (len >= (STRLEN)PL_origalen-1) {
2680 /* Longer than original, will be truncated. We assume that
2681 * PL_origalen bytes are available. */
2682 Copy(s, PL_origargv[0], PL_origalen-1, char);
2683 }
2684 else {
2685 /* Shorter than original, will be padded. */
235ac35d 2686#ifdef PERL_DARWIN
60777a0d
JH
2687 /* Special case for Mac OS X: see [perl #38868] */
2688 const int pad = 0;
235ac35d 2689#else
8a89a4f1
MB
2690 /* Is the space counterintuitive? Yes.
2691 * (You were expecting \0?)
2692 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2693 * --jhi */
60777a0d 2694 const int pad = ' ';
235ac35d 2695#endif
60777a0d
JH
2696 Copy(s, PL_origargv[0], len, char);
2697 PL_origargv[0][len] = 0;
2698 memset(PL_origargv[0] + len + 1,
2699 pad, PL_origalen - len - 1);
2d2af554
GA
2700 }
2701 PL_origargv[0][PL_origalen-1] = 0;
2702 for (i = 1; i < PL_origargc; i++)
2703 PL_origargv[i] = 0;
79072805 2704 }
9d3968b2 2705#endif
e2975953 2706 UNLOCK_DOLLARZERO_MUTEX;
79072805 2707 break;
cd39f2b6 2708#endif
79072805
LW
2709 }
2710 return 0;
2711}
2712
2713I32
35a4481c 2714Perl_whichsig(pTHX_ const char *sig)
79072805 2715{
aadb217d 2716 register char* const* sigv;
96a5add6 2717 PERL_UNUSED_CONTEXT;
79072805 2718
aadb217d 2719 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2720 if (strEQ(sig,*sigv))
aadb217d 2721 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2722#ifdef SIGCLD
2723 if (strEQ(sig,"CHLD"))
2724 return SIGCLD;
2725#endif
2726#ifdef SIGCHLD
2727 if (strEQ(sig,"CLD"))
2728 return SIGCHLD;
2729#endif
7f1236c0 2730 return -1;
79072805
LW
2731}
2732
ecfc5424 2733Signal_t
1e82f5a6 2734#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2735Perl_sighandler(int sig, ...)
1e82f5a6
SH
2736#else
2737Perl_sighandler(int sig)
2738#endif
79072805 2739{
1018e26f
NIS
2740#ifdef PERL_GET_SIG_CONTEXT
2741 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2742#else
cea2e8a9 2743 dTHX;
71d280e3 2744#endif
79072805 2745 dSP;
a0714e2c
SS
2746 GV *gv = NULL;
2747 SV *sv = NULL;
8772537c 2748 SV * const tSv = PL_Sv;
601f1833 2749 CV *cv = NULL;
533c011a 2750 OP *myop = PL_op;
84902520 2751 U32 flags = 0;
8772537c 2752 XPV * const tXpv = PL_Xpv;
71d280e3 2753
3280af22 2754 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2755 flags |= 1;
3280af22 2756 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2757 flags |= 4;
3280af22 2758 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2759 flags |= 16;
2760
727405f8 2761 if (!PL_psig_ptr[sig]) {
99ef548b 2762 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2763 PL_sig_name[sig]);
2764 exit(sig);
2765 }
ff0cee69 2766
84902520
TB
2767 /* Max number of items pushed there is 3*n or 4. We cannot fix
2768 infinity, so we fix 4 (in fact 5): */
2769 if (flags & 1) {
3280af22 2770 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2771 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2772 }
ac27b0f5 2773 if (flags & 4)
3280af22 2774 PL_markstack_ptr++; /* Protect mark. */
84902520 2775 if (flags & 16)
3280af22 2776 PL_scopestack_ix += 1;
84902520 2777 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2778 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2779 || SvTYPE(cv) != SVt_PVCV) {
2780 HV *st;
f2c0649b 2781 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2782 }
84902520 2783
a0d0e21e 2784 if (!cv || !CvROOT(cv)) {
599cee73 2785 if (ckWARN(WARN_SIGNAL))
9014280d 2786 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2787 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2788 : ((cv && CvGV(cv))
2789 ? GvENAME(CvGV(cv))
2790 : "__ANON__")));
2791 goto cleanup;
79072805
LW
2792 }
2793
22c35a8c 2794 if(PL_psig_name[sig]) {
b37c2d43 2795 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2796 flags |= 64;
df3728a2 2797#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2798 PL_sig_sv = sv;
df3728a2 2799#endif
84902520 2800 } else {
ff0cee69 2801 sv = sv_newmortal();
22c35a8c 2802 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2803 }
e336de0d 2804
e788e7d3 2805 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2806 PUSHMARK(SP);
79072805 2807 PUSHs(sv);
8aad04aa
JH
2808#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2809 {
2810 struct sigaction oact;
2811
2812 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2813 siginfo_t *sip;
2814 va_list args;
2815
2816 va_start(args, sig);
2817 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2818 if (sip) {
2819 HV *sih = newHV();
2820 SV *rv = newRV_noinc((SV*)sih);
2821 /* The siginfo fields signo, code, errno, pid, uid,
2822 * addr, status, and band are defined by POSIX/SUSv3. */
2823 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2824 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2825#if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
ea1bde16 2826 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2827 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2828 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2829 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2830 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2831 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2832#endif
8aad04aa
JH
2833 EXTEND(SP, 2);
2834 PUSHs((SV*)rv);
10edeb5d 2835 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2836 }
b4552a27 2837
31427afe 2838 va_end(args);
8aad04aa
JH
2839 }
2840 }
2841#endif
79072805 2842 PUTBACK;
a0d0e21e 2843
1b266415 2844 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2845
d3acc0f7 2846 POPSTACK;
1b266415 2847 if (SvTRUE(ERRSV)) {
1d615522 2848#ifndef PERL_MICRO
983dbef6 2849#ifdef HAS_SIGPROCMASK
1b266415
NIS
2850 /* Handler "died", for example to get out of a restart-able read().
2851 * Before we re-do that on its behalf re-enable the signal which was
2852 * blocked by the system when we entered.
2853 */
2854 sigset_t set;
2855 sigemptyset(&set);
2856 sigaddset(&set,sig);
2857 sigprocmask(SIG_UNBLOCK, &set, NULL);
2858#else
2859 /* Not clear if this will work */
2860 (void)rsignal(sig, SIG_IGN);
5c1546dc 2861 (void)rsignal(sig, PL_csighandlerp);
1b266415 2862#endif
1d615522 2863#endif /* !PERL_MICRO */
bd61b366 2864 Perl_die(aTHX_ NULL);
1b266415 2865 }
00d579c5 2866cleanup:
84902520 2867 if (flags & 1)
3280af22 2868 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2869 if (flags & 4)
3280af22 2870 PL_markstack_ptr--;
84902520 2871 if (flags & 16)
3280af22 2872 PL_scopestack_ix -= 1;
84902520
TB
2873 if (flags & 64)
2874 SvREFCNT_dec(sv);
533c011a 2875 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2876
3280af22
NIS
2877 PL_Sv = tSv; /* Restore global temporaries. */
2878 PL_Xpv = tXpv;
53bb94e2 2879 return;
79072805 2880}
4e35701f
NIS
2881
2882
51371543 2883static void
8772537c 2884S_restore_magic(pTHX_ const void *p)
51371543 2885{
97aff369 2886 dVAR;
8772537c
AL
2887 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2888 SV* const sv = mgs->mgs_sv;
51371543
GS
2889
2890 if (!sv)
2891 return;
2892
2893 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2894 {
f8c7b90f 2895#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2896 /* While magic was saved (and off) sv_setsv may well have seen
2897 this SV as a prime candidate for COW. */
2898 if (SvIsCOW(sv))
e424a81e 2899 sv_force_normal_flags(sv, 0);
f9701176
NC
2900#endif
2901
51371543
GS
2902 if (mgs->mgs_flags)
2903 SvFLAGS(sv) |= mgs->mgs_flags;
2904 else
2905 mg_magical(sv);
2b77b520
YST
2906 if (SvGMAGICAL(sv)) {
2907 /* downgrade public flags to private,
2908 and discard any other private flags */
2909
10edeb5d
JH
2910 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2911 if (pubflags) {
2912 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2913 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2914 }
2915 }
51371543
GS
2916 }
2917
2918 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2919
2920 /* If we're still on top of the stack, pop us off. (That condition
2921 * will be satisfied if restore_magic was called explicitly, but *not*
2922 * if it's being called via leave_scope.)
2923 * The reason for doing this is that otherwise, things like sv_2cv()
2924 * may leave alloc gunk on the savestack, and some code
2925 * (e.g. sighandler) doesn't expect that...
2926 */
2927 if (PL_savestack_ix == mgs->mgs_ss_ix)
2928 {
2929 I32 popval = SSPOPINT;
c76ac1ee 2930 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2931 PL_savestack_ix -= 2;
2932 popval = SSPOPINT;
2933 assert(popval == SAVEt_ALLOC);
2934 popval = SSPOPINT;
2935 PL_savestack_ix -= popval;
2936 }
2937
2938}
2939
2940static void
8772537c 2941S_unwind_handler_stack(pTHX_ const void *p)
51371543 2942{
27da23d5 2943 dVAR;
e1ec3a88 2944 const U32 flags = *(const U32*)p;
51371543
GS
2945
2946 if (flags & 1)
2947 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2948#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2949 if (flags & 64)
27da23d5 2950 SvREFCNT_dec(PL_sig_sv);
df3728a2 2951#endif
51371543 2952}
1018e26f 2953
66610fdd 2954/*
b3ca2e83
NC
2955=for apidoc magic_sethint
2956
2957Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
2958C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
2959anything that would need a deep copy. Maybe we should warn if we find a
2960reference.
b3ca2e83
NC
2961
2962=cut
2963*/
2964int
2965Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
2966{
2967 dVAR;
2968 assert(mg->mg_len == HEf_SVKEY);
2969
e6e3e454
NC
2970 /* mg->mg_obj isn't being used. If needed, it would be possible to store
2971 an alternative leaf in there, with PL_compiling.cop_hints being used if
2972 it's NULL. If needed for threads, the alternative could lock a mutex,
2973 or take other more complex action. */
2974
5b9c0671
NC
2975 /* Something changed in %^H, so it will need to be restored on scope exit.
2976 Doing this here saves a lot of doing it manually in perl code (and
2977 forgetting to do it, and consequent subtle errors. */
2978 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
2979 PL_compiling.cop_hints_hash
2980 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 2981 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
2982 return 0;
2983}
2984
2985/*
2986=for apidoc magic_sethint
2987
c28fe1ec
NC
2988Triggered by a delete from %^H, records the key to
2989C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
2990
2991=cut
2992*/
2993int
2994Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
2995{
2996 dVAR;
f5a63d97
AL
2997 PERL_UNUSED_ARG(sv);
2998
b3ca2e83
NC
2999 assert(mg->mg_len == HEf_SVKEY);
3000
b3f24c00
MHM
3001 PERL_UNUSED_ARG(sv);
3002
5b9c0671 3003 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3004 PL_compiling.cop_hints_hash
3005 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3006 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3007 return 0;
3008}
3009
3010/*
66610fdd
RGS
3011 * Local variables:
3012 * c-indentation-style: bsd
3013 * c-basic-offset: 4
3014 * indent-tabs-mode: t
3015 * End:
3016 *
37442d52
RGS
3017 * ex: set ts=8 sts=4 sw=4 noet:
3018 */