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move PL_lex_state into the PL_parser struct
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a0d0e21e 1/* mg.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
7272f7c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
12 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent."
79072805
LW
14 */
15
ccfc67b7
JH
16/*
17=head1 Magical Functions
166f8a29
DM
18
19"Magic" is special data attached to SV structures in order to give them
20"magical" properties. When any Perl code tries to read from, or assign to,
21an SV marked as magical, it calls the 'get' or 'set' function associated
22with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 23give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
24number of the last read filehandle into to the SV's IV slot), while
25set is called after an SV has been written to, in order to allow it to make
ddfa107c 26use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
27PL_rs global variable).
28
29Magic is implemented as a linked list of MAGIC structures attached to the
30SV. Each MAGIC struct holds the type of the magic, a pointer to an array
31of functions that implement the get(), set(), length() etc functions,
32plus space for some flags and pointers. For example, a tied variable has
33a MAGIC structure that contains a pointer to the object associated with the
34tie.
35
ccfc67b7
JH
36*/
37
79072805 38#include "EXTERN.h"
864dbfa3 39#define PERL_IN_MG_C
79072805
LW
40#include "perl.h"
41
5cd24f17 42#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
43# ifdef I_GRP
44# include <grp.h>
45# endif
188ea221
CS
46#endif
47
757f63d8
SP
48#if defined(HAS_SETGROUPS)
49# ifndef NGROUPS
50# define NGROUPS 32
51# endif
52#endif
53
17aa7f3d
JH
54#ifdef __hpux
55# include <sys/pstat.h>
56#endif
57
8aad04aa
JH
58#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
59Signal_t Perl_csighandler(int sig, ...);
60#else
e69880a5 61Signal_t Perl_csighandler(int sig);
8aad04aa 62#endif
e69880a5 63
9cffb111
OS
64#ifdef __Lynx__
65/* Missing protos on LynxOS */
66void setruid(uid_t id);
67void seteuid(uid_t id);
68void setrgid(uid_t id);
69void setegid(uid_t id);
70#endif
71
c07a80fd
PP
72/*
73 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
74 */
75
76struct magic_state {
77 SV* mgs_sv;
78 U32 mgs_flags;
455ece5e 79 I32 mgs_ss_ix;
c07a80fd 80};
455ece5e 81/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
82
83STATIC void
8fb26106 84S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 85{
97aff369 86 dVAR;
455ece5e 87 MGS* mgs;
c07a80fd 88 assert(SvMAGICAL(sv));
d8b2590f
NC
89 /* Turning READONLY off for a copy-on-write scalar (including shared
90 hash keys) is a bad idea. */
765f542d 91 if (SvIsCOW(sv))
9a265e59 92 sv_force_normal_flags(sv, 0);
c07a80fd 93
8772537c 94 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
95
96 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd
PP
97 mgs->mgs_sv = sv;
98 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
455ece5e 99 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
c07a80fd
PP
100
101 SvMAGICAL_off(sv);
102 SvREADONLY_off(sv);
085bde85
NC
103 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
104 /* No public flags are set, so promote any private flags to public. */
105 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
106 }
c07a80fd
PP
107}
108
954c1994
GS
109/*
110=for apidoc mg_magical
111
112Turns on the magical status of an SV. See C<sv_magic>.
113
114=cut
115*/
116
8990e307 117void
864dbfa3 118Perl_mg_magical(pTHX_ SV *sv)
8990e307 119{
e1ec3a88 120 const MAGIC* mg;
96a5add6 121 PERL_UNUSED_CONTEXT;
8990e307 122 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 123 const MGVTBL* const vtbl = mg->mg_virtual;
8990e307 124 if (vtbl) {
2b260de0 125 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
8990e307
LW
126 SvGMAGICAL_on(sv);
127 if (vtbl->svt_set)
128 SvSMAGICAL_on(sv);
2b260de0 129 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
8990e307
LW
130 SvRMAGICAL_on(sv);
131 }
132 }
133}
134
2767dea0
DM
135
136/* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
137
138STATIC bool
139S_is_container_magic(const MAGIC *mg)
140{
141 switch (mg->mg_type) {
142 case PERL_MAGIC_bm:
143 case PERL_MAGIC_fm:
144 case PERL_MAGIC_regex_global:
145 case PERL_MAGIC_nkeys:
146#ifdef USE_LOCALE_COLLATE
147 case PERL_MAGIC_collxfrm:
148#endif
149 case PERL_MAGIC_qr:
150 case PERL_MAGIC_taint:
151 case PERL_MAGIC_vec:
152 case PERL_MAGIC_vstring:
153 case PERL_MAGIC_utf8:
154 case PERL_MAGIC_substr:
155 case PERL_MAGIC_defelem:
156 case PERL_MAGIC_arylen:
157 case PERL_MAGIC_pos:
158 case PERL_MAGIC_backref:
159 case PERL_MAGIC_arylen_p:
160 case PERL_MAGIC_rhash:
161 case PERL_MAGIC_symtab:
162 return 0;
163 default:
164 return 1;
165 }
166}
167
954c1994
GS
168/*
169=for apidoc mg_get
170
171Do magic after a value is retrieved from the SV. See C<sv_magic>.
172
173=cut
174*/
175
79072805 176int
864dbfa3 177Perl_mg_get(pTHX_ SV *sv)
79072805 178{
97aff369 179 dVAR;
35a4481c 180 const I32 mgs_ix = SSNEW(sizeof(MGS));
fe2774ed 181 const bool was_temp = (bool)SvTEMP(sv);
0723351e 182 int have_new = 0;
ff76feab 183 MAGIC *newmg, *head, *cur, *mg;
20135930 184 /* guard against sv having being freed midway by holding a private
6683b158
NC
185 reference. */
186
187 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
188 cause the SV's buffer to get stolen (and maybe other stuff).
189 So restore it.
190 */
46da273f 191 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC
192 if (!was_temp) {
193 SvTEMP_off(sv);
194 }
195
455ece5e 196 save_magic(mgs_ix, sv);
463ee0b2 197
ff76feab
AMS
198 /* We must call svt_get(sv, mg) for each valid entry in the linked
199 list of magic. svt_get() may delete the current entry, add new
200 magic to the head of the list, or upgrade the SV. AMS 20010810 */
201
202 newmg = cur = head = mg = SvMAGIC(sv);
203 while (mg) {
35a4481c 204 const MGVTBL * const vtbl = mg->mg_virtual;
ff76feab 205
2b260de0 206 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 207 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 208
58f82c5c
DM
209 /* guard against magic having been deleted - eg FETCH calling
210 * untie */
211 if (!SvMAGIC(sv))
212 break;
b77f7d40 213
ff76feab
AMS
214 /* Don't restore the flags for this entry if it was deleted. */
215 if (mg->mg_flags & MGf_GSKIP)
216 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
a0d0e21e 217 }
ff76feab
AMS
218
219 mg = mg->mg_moremagic;
220
0723351e 221 if (have_new) {
ff76feab
AMS
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
224 if (mg == head) {
0723351e 225 have_new = 0;
ff76feab
AMS
226 mg = cur;
227 head = newmg;
228 }
229 }
230
231 /* Were any new entries added? */
0723351e
NC
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
233 have_new = 1;
ff76feab
AMS
234 cur = mg;
235 mg = newmg;
760ac839 236 }
79072805 237 }
463ee0b2 238
8772537c 239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC
240
241 if (SvREFCNT(sv) == 1) {
242 /* We hold the last reference to this SV, which implies that the
243 SV was deleted as a side effect of the routines we called. */
0c34ef67 244 SvOK_off(sv);
6683b158 245 }
79072805
LW
246 return 0;
247}
248
954c1994
GS
249/*
250=for apidoc mg_set
251
252Do magic after a value is assigned to the SV. See C<sv_magic>.
253
254=cut
255*/
256
79072805 257int
864dbfa3 258Perl_mg_set(pTHX_ SV *sv)
79072805 259{
97aff369 260 dVAR;
35a4481c 261 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 262 MAGIC* mg;
463ee0b2
LW
263 MAGIC* nextmg;
264
455ece5e 265 save_magic(mgs_ix, sv);
463ee0b2
LW
266
267 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 268 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 269 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
270 if (mg->mg_flags & MGf_GSKIP) {
271 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
455ece5e 272 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
a0d0e21e 273 }
e7cbf6c6
DM
274 if (PL_localizing == 2 && !S_is_container_magic(mg))
275 continue;
2b260de0 276 if (vtbl && vtbl->svt_set)
fc0dc3b3 277 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 278 }
463ee0b2 279
8772537c 280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
281 return 0;
282}
283
954c1994
GS
284/*
285=for apidoc mg_length
286
287Report on the SV's length. See C<sv_magic>.
288
289=cut
290*/
291
79072805 292U32
864dbfa3 293Perl_mg_length(pTHX_ SV *sv)
79072805 294{
97aff369 295 dVAR;
79072805 296 MAGIC* mg;
463ee0b2 297 STRLEN len;
463ee0b2 298
79072805 299 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 300 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 301 if (vtbl && vtbl->svt_len) {
35a4481c 302 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 303 save_magic(mgs_ix, sv);
a0d0e21e 304 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 305 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 306 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
307 return len;
308 }
309 }
310
35a4481c 311 if (DO_UTF8(sv)) {
10516c54 312 const U8 *s = (U8*)SvPV_const(sv, len);
f5a63d97 313 len = utf8_length(s, s + len);
5636d518
DB
314 }
315 else
10516c54 316 (void)SvPV_const(sv, len);
463ee0b2 317 return len;
79072805
LW
318}
319
8fb26106 320I32
864dbfa3 321Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
322{
323 MAGIC* mg;
ac27b0f5 324
93965878 325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 326 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 327 if (vtbl && vtbl->svt_len) {
35a4481c
AL
328 const I32 mgs_ix = SSNEW(sizeof(MGS));
329 I32 len;
455ece5e 330 save_magic(mgs_ix, sv);
93965878 331 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 332 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 333 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
334 return len;
335 }
336 }
337
338 switch(SvTYPE(sv)) {
339 case SVt_PVAV:
35a4481c 340 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
93965878
NIS
341 case SVt_PVHV:
342 /* FIXME */
343 default:
cea2e8a9 344 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
345 break;
346 }
347 return 0;
348}
349
954c1994
GS
350/*
351=for apidoc mg_clear
352
353Clear something magical that the SV represents. See C<sv_magic>.
354
355=cut
356*/
357
79072805 358int
864dbfa3 359Perl_mg_clear(pTHX_ SV *sv)
79072805 360{
35a4481c 361 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 362 MAGIC* mg;
463ee0b2 363
455ece5e 364 save_magic(mgs_ix, sv);
463ee0b2 365
79072805 366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 367 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 368 /* omit GSKIP -- never set here */
727405f8 369
2b260de0 370 if (vtbl && vtbl->svt_clear)
fc0dc3b3 371 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 372 }
463ee0b2 373
8772537c 374 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
375 return 0;
376}
377
954c1994
GS
378/*
379=for apidoc mg_find
380
381Finds the magic pointer for type matching the SV. See C<sv_magic>.
382
383=cut
384*/
385
93a17b20 386MAGIC*
35a4481c 387Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 388{
96a5add6 389 PERL_UNUSED_CONTEXT;
35a4481c
AL
390 if (sv) {
391 MAGIC *mg;
392 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
393 if (mg->mg_type == type)
394 return mg;
395 }
93a17b20 396 }
5f66b61c 397 return NULL;
93a17b20
LW
398}
399
954c1994
GS
400/*
401=for apidoc mg_copy
402
403Copies the magic from one SV to another. See C<sv_magic>.
404
405=cut
406*/
407
79072805 408int
864dbfa3 409Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 410{
463ee0b2 411 int count = 0;
79072805 412 MAGIC* mg;
463ee0b2 413 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 414 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS
415 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
416 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
417 }
823a54a3
AL
418 else {
419 const char type = mg->mg_type;
1e73acc8 420 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
421 sv_magic(nsv,
422 (type == PERL_MAGIC_tied)
423 ? SvTIED_obj(sv, mg)
424 : (type == PERL_MAGIC_regdata && mg->mg_obj)
425 ? sv
426 : mg->mg_obj,
427 toLOWER(type), key, klen);
428 count++;
429 }
79072805 430 }
79072805 431 }
463ee0b2 432 return count;
79072805
LW
433}
434
954c1994 435/*
0cbee0a4
DM
436=for apidoc mg_localize
437
438Copy some of the magic from an existing SV to new localized version of
439that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
440doesn't (eg taint, pos).
441
442=cut
443*/
444
445void
446Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
447{
97aff369 448 dVAR;
0cbee0a4
DM
449 MAGIC *mg;
450 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 451 const MGVTBL* const vtbl = mg->mg_virtual;
2767dea0 452 if (!S_is_container_magic(mg))
0cbee0a4 453 continue;
0cbee0a4 454
a5063e7c
DM
455 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
456 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
457 else
0cbee0a4
DM
458 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
459 mg->mg_ptr, mg->mg_len);
a5063e7c 460
0cbee0a4
DM
461 /* container types should remain read-only across localization */
462 SvFLAGS(nsv) |= SvREADONLY(sv);
463 }
464
465 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
466 SvFLAGS(nsv) |= SvMAGICAL(sv);
467 PL_localizing = 1;
468 SvSETMAGIC(nsv);
469 PL_localizing = 0;
470 }
471}
472
473/*
954c1994
GS
474=for apidoc mg_free
475
476Free any magic storage used by the SV. See C<sv_magic>.
477
478=cut
479*/
480
79072805 481int
864dbfa3 482Perl_mg_free(pTHX_ SV *sv)
79072805
LW
483{
484 MAGIC* mg;
485 MAGIC* moremagic;
486 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 487 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 488 moremagic = mg->mg_moremagic;
2b260de0 489 if (vtbl && vtbl->svt_free)
fc0dc3b3 490 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 491 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 492 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 493 Safefree(mg->mg_ptr);
565764a8 494 else if (mg->mg_len == HEf_SVKEY)
88e89b8a 495 SvREFCNT_dec((SV*)mg->mg_ptr);
d460ef45 496 }
b881518d
JH
497 if (mg->mg_flags & MGf_REFCOUNTED)
498 SvREFCNT_dec(mg->mg_obj);
79072805
LW
499 Safefree(mg);
500 }
b162af07 501 SvMAGIC_set(sv, NULL);
79072805
LW
502 return 0;
503}
504
79072805 505#include <signal.h>
79072805 506
942e002e 507U32
864dbfa3 508Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 509{
97aff369 510 dVAR;
8772537c 511 PERL_UNUSED_ARG(sv);
6cef1e77 512
0bd48802
AL
513 if (PL_curpm) {
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
515 if (rx) {
a678b0e4
YO
516 if (mg->mg_obj) { /* @+ */
517 /* return the number possible */
518 return rx->nparens;
519 } else { /* @- */
520 I32 paren = rx->lastparen;
521
522 /* return the last filled */
f46c4081 523 while ( paren >= 0
f0ab9afb
NC
524 && (rx->offs[paren].start == -1
525 || rx->offs[paren].end == -1) )
f46c4081 526 paren--;
a678b0e4
YO
527 return (U32)paren;
528 }
0bd48802 529 }
8f580fb8 530 }
ac27b0f5 531
942e002e 532 return (U32)-1;
6cef1e77
IZ
533}
534
535int
864dbfa3 536Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 537{
97aff369 538 dVAR;
0bd48802
AL
539 if (PL_curpm) {
540 register const REGEXP * const rx = PM_GETRE(PL_curpm);
541 if (rx) {
542 register const I32 paren = mg->mg_len;
543 register I32 s;
544 register I32 t;
545 if (paren < 0)
546 return 0;
547 if (paren <= (I32)rx->nparens &&
f0ab9afb
NC
548 (s = rx->offs[paren].start) != -1 &&
549 (t = rx->offs[paren].end) != -1)
0bd48802
AL
550 {
551 register I32 i;
552 if (mg->mg_obj) /* @+ */
553 i = t;
554 else /* @- */
555 i = s;
556
557 if (i > 0 && RX_MATCH_UTF8(rx)) {
558 const char * const b = rx->subbeg;
559 if (b)
f5a63d97 560 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 561 }
727405f8 562
0bd48802 563 sv_setiv(sv, i);
1aa99e6b 564 }
0bd48802 565 }
6cef1e77
IZ
566 }
567 return 0;
568}
569
e4b89193 570int
a29d06ed
MG
571Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
572{
d4c19fe8
AL
573 PERL_UNUSED_ARG(sv);
574 PERL_UNUSED_ARG(mg);
a29d06ed 575 Perl_croak(aTHX_ PL_no_modify);
0dbb1585 576 NORETURN_FUNCTION_END;
a29d06ed
MG
577}
578
93a17b20 579U32
864dbfa3 580Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 581{
97aff369 582 dVAR;
93a17b20 583 register I32 paren;
93a17b20 584 register I32 i;
2fdbfb4d
AB
585 register const REGEXP * rx;
586 const char * const remaining = mg->mg_ptr + 1;
93a17b20
LW
587
588 switch (*mg->mg_ptr) {
2fdbfb4d
AB
589 case '\020':
590 if (*remaining == '\0') { /* ^P */
591 break;
592 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
593 goto do_prematch;
594 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
595 goto do_postmatch;
596 }
597 break;
598 case '\015': /* $^MATCH */
599 if (strEQ(remaining, "ATCH")) {
600 goto do_match;
601 } else {
602 break;
603 }
604 case '`':
605 do_prematch:
606 paren = -2;
607 goto maybegetparen;
608 case '\'':
609 do_postmatch:
610 paren = -1;
611 goto maybegetparen;
612 case '&':
613 do_match:
614 paren = 0;
615 goto maybegetparen;
93a17b20 616 case '1': case '2': case '3': case '4':
2fdbfb4d
AB
617 case '5': case '6': case '7': case '8': case '9':
618 paren = atoi(mg->mg_ptr);
619 maybegetparen:
aaa362c4 620 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
621 getparen:
622 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 623
ffc61ed2 624 if (i < 0)
0844c848 625 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 626 return i;
2fdbfb4d 627 } else {
235bddc8 628 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 629 report_uninit(sv);
2fdbfb4d 630 return 0;
93a17b20 631 }
93a17b20 632 case '+':
aaa362c4 633 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
d9f97599 634 paren = rx->lastparen;
13f57bf8
CS
635 if (paren)
636 goto getparen;
93a17b20 637 }
748a9306 638 return 0;
a01268b5
JH
639 case '\016': /* ^N */
640 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
641 paren = rx->lastcloseparen;
642 if (paren)
643 goto getparen;
644 }
645 return 0;
93a17b20
LW
646 }
647 magic_get(sv,mg);
2d8e6c8d 648 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 649 sv_2pv(sv, 0);
2d8e6c8d 650 }
93a17b20
LW
651 if (SvPOK(sv))
652 return SvCUR(sv);
653 return 0;
654}
655
ad3296c6 656#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
657 if (SvPOK(sv)) { \
658 STRLEN len = SvCUR(sv); \
659 char * const p = SvPVX(sv); \
8e6b4db6
PC
660 while (len > 0 && isSPACE(p[len-1])) \
661 --len; \
662 SvCUR_set(sv, len); \
663 p[len] = '\0'; \
664 } \
ad3296c6
SH
665} STMT_END
666
8b850bd5
NC
667void
668Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
669{
670 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
671 sv_setsv(sv, &PL_sv_undef);
672 else {
673 sv_setpvs(sv, "");
674 SvUTF8_off(sv);
675 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
676 SV *const value = Perl_refcounted_he_fetch(aTHX_
677 c->cop_hints_hash,
678 0, "open<", 5, 0, 0);
679 assert(value);
680 sv_catsv(sv, value);
681 }
682 sv_catpvs(sv, "\0");
683 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
684 SV *const value = Perl_refcounted_he_fetch(aTHX_
685 c->cop_hints_hash,
686 0, "open>", 5, 0, 0);
687 assert(value);
688 sv_catsv(sv, value);
689 }
690 }
691}
692
79072805 693int
864dbfa3 694Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 695{
27da23d5 696 dVAR;
79072805 697 register I32 paren;
35272f84 698 register char *s = NULL;
d9f97599 699 register REGEXP *rx;
823a54a3
AL
700 const char * const remaining = mg->mg_ptr + 1;
701 const char nextchar = *remaining;
79072805
LW
702
703 switch (*mg->mg_ptr) {
748a9306 704 case '\001': /* ^A */
3280af22 705 sv_setsv(sv, PL_bodytarget);
748a9306 706 break;
e5218da5 707 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 708 if (nextchar == '\0') {
e5218da5
GA
709 sv_setiv(sv, (IV)PL_minus_c);
710 }
823a54a3 711 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
712 sv_setiv(sv, (IV)STATUS_NATIVE);
713 }
49460fe6
NIS
714 break;
715
79072805 716 case '\004': /* ^D */
aea4f609 717 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 718 break;
28f23441 719 case '\005': /* ^E */
823a54a3 720 if (nextchar == '\0') {
4b645107 721#if defined(MACOS_TRADITIONAL)
0a378802
JH
722 {
723 char msg[256];
727405f8 724
0a378802 725 sv_setnv(sv,(double)gMacPerl_OSErr);
727405f8 726 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
0a378802 727 }
4b645107 728#elif defined(VMS)
0a378802
JH
729 {
730# include <descrip.h>
731# include <starlet.h>
732 char msg[255];
733 $DESCRIPTOR(msgdsc,msg);
734 sv_setnv(sv,(NV) vaxc$errno);
735 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
736 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
737 else
c69006e4 738 sv_setpvn(sv,"",0);
0a378802 739 }
4b645107 740#elif defined(OS2)
0a378802
JH
741 if (!(_emx_env & 0x200)) { /* Under DOS */
742 sv_setnv(sv, (NV)errno);
743 sv_setpv(sv, errno ? Strerror(errno) : "");
744 } else {
745 if (errno != errno_isOS2) {
823a54a3 746 const int tmp = _syserrno();
0a378802
JH
747 if (tmp) /* 2nd call to _syserrno() makes it 0 */
748 Perl_rc = tmp;
749 }
750 sv_setnv(sv, (NV)Perl_rc);
751 sv_setpv(sv, os2error(Perl_rc));
752 }
4b645107 753#elif defined(WIN32)
0a378802 754 {
d4c19fe8 755 const DWORD dwErr = GetLastError();
0a378802 756 sv_setnv(sv, (NV)dwErr);
823a54a3 757 if (dwErr) {
0a378802
JH
758 PerlProc_GetOSError(sv, dwErr);
759 }
760 else
c69006e4 761 sv_setpvn(sv, "", 0);
0a378802
JH
762 SetLastError(dwErr);
763 }
22fae026 764#else
f6c8f21d 765 {
8772537c 766 const int saveerrno = errno;
f6c8f21d 767 sv_setnv(sv, (NV)errno);
666ea192 768 sv_setpv(sv, errno ? Strerror(errno) : "");
f6c8f21d
RGS
769 errno = saveerrno;
770 }
28f23441 771#endif
ad3296c6 772 SvRTRIM(sv);
0a378802
JH
773 SvNOK_on(sv); /* what a wonderful hack! */
774 }
823a54a3 775 else if (strEQ(remaining, "NCODING"))
0a378802
JH
776 sv_setsv(sv, PL_encoding);
777 break;
79072805 778 case '\006': /* ^F */
3280af22 779 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 780 break;
a0d0e21e 781 case '\010': /* ^H */
3280af22 782 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 783 break;
9d116dd7 784 case '\011': /* ^I */ /* NOT \t in EBCDIC */
3280af22
NIS
785 if (PL_inplace)
786 sv_setpv(sv, PL_inplace);
79072805 787 else
3280af22 788 sv_setsv(sv, &PL_sv_undef);
79072805 789 break;
ac27b0f5 790 case '\017': /* ^O & ^OPEN */
823a54a3 791 if (nextchar == '\0') {
ac27b0f5 792 sv_setpv(sv, PL_osname);
3511154c
DM
793 SvTAINTED_off(sv);
794 }
823a54a3 795 else if (strEQ(remaining, "PEN")) {
8b850bd5 796 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 797 }
28f23441 798 break;
cde0cee5
YO
799 case '\020':
800 if (nextchar == '\0') { /* ^P */
801 sv_setiv(sv, (IV)PL_perldb);
802 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
803 goto do_prematch_fetch;
804 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
805 goto do_postmatch_fetch;
806 }
79072805 807 break;
fb73857a 808 case '\023': /* ^S */
823a54a3 809 if (nextchar == '\0') {
bc177e6b 810 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 811 SvOK_off(sv);
3280af22 812 else if (PL_in_eval)
6dc8a9e4 813 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
814 else
815 sv_setiv(sv, 0);
d58bf5aa 816 }
fb73857a 817 break;
79072805 818 case '\024': /* ^T */
823a54a3 819 if (nextchar == '\0') {
88e89b8a 820#ifdef BIG_TIME
7c36658b 821 sv_setnv(sv, PL_basetime);
88e89b8a 822#else
7c36658b 823 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 824#endif
7c36658b 825 }
823a54a3 826 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
827 sv_setiv(sv, PL_tainting
828 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
829 : 0);
7c36658b 830 break;
e07ea26a 831 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 832 if (strEQ(remaining, "NICODE"))
a05d7ebb 833 sv_setuv(sv, (UV) PL_unicode);
823a54a3 834 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 835 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
836 else if (strEQ(remaining, "TF8CACHE"))
837 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
838 break;
839 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 840 if (nextchar == '\0')
4438c4b7 841 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 842 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 843 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 844 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
845 }
846 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH
847 sv_setpvn(
848 sv,
849 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
850 WARNsize
851 );
013b78e8 852 }
d3a7d8c7 853 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
854 /* Get the bit mask for $warnings::Bits{all}, because
855 * it could have been extended by warnings::register */
823a54a3 856 HV * const bits=get_hv("warnings::Bits", FALSE);
f5a63d97
AL
857 if (bits) {
858 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
859 if (bits_all)
860 sv_setsv(sv, *bits_all);
75b6c4ca
RGS
861 }
862 else {
863 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
864 }
ac27b0f5 865 }
4438c4b7 866 else {
72dc9ed5
NC
867 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
868 *PL_compiling.cop_warnings);
ac27b0f5 869 }
d3a7d8c7 870 SvPOK_only(sv);
4438c4b7 871 }
79072805 872 break;
cde0cee5
YO
873 case '\015': /* $^MATCH */
874 if (strEQ(remaining, "ATCH")) {
79072805
LW
875 case '1': case '2': case '3': case '4':
876 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
877 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
878 /*
879 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
880 * XXX Does the new way break anything?
881 */
882 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 883 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO
884 break;
885 }
886 sv_setsv(sv,&PL_sv_undef);
79072805
LW
887 }
888 break;
889 case '+':
aaa362c4 890 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 891 if (rx->lastparen) {
2fdbfb4d 892 CALLREG_NUMBUF_FETCH(rx,rx->lastparen,sv);
44a2ac75
YO
893 break;
894 }
79072805 895 }
3280af22 896 sv_setsv(sv,&PL_sv_undef);
79072805 897 break;
a01268b5
JH
898 case '\016': /* ^N */
899 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
44a2ac75 900 if (rx->lastcloseparen) {
2fdbfb4d 901 CALLREG_NUMBUF_FETCH(rx,rx->lastcloseparen,sv);
44a2ac75
YO
902 break;
903 }
904
a01268b5
JH
905 }
906 sv_setsv(sv,&PL_sv_undef);
907 break;
79072805 908 case '`':
cde0cee5 909 do_prematch_fetch:
aaa362c4 910 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 911 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 912 break;
79072805 913 }
3280af22 914 sv_setsv(sv,&PL_sv_undef);
79072805
LW
915 break;
916 case '\'':
cde0cee5 917 do_postmatch_fetch:
aaa362c4 918 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 919 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 920 break;
79072805 921 }
3280af22 922 sv_setsv(sv,&PL_sv_undef);
79072805
LW
923 break;
924 case '.':
3280af22 925 if (GvIO(PL_last_in_gv)) {
357c8808 926 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 927 }
79072805
LW
928 break;
929 case '?':
809a5acc 930 {
809a5acc 931 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 932#ifdef COMPLEX_STATUS
6b88bc9c
GS
933 LvTARGOFF(sv) = PL_statusvalue;
934 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 935#endif
809a5acc 936 }
79072805
LW
937 break;
938 case '^':
0daa599b
RGS
939 if (GvIOp(PL_defoutgv))
940 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
941 if (s)
942 sv_setpv(sv,s);
943 else {
3280af22 944 sv_setpv(sv,GvENAME(PL_defoutgv));
79072805
LW
945 sv_catpv(sv,"_TOP");
946 }
947 break;
948 case '~':
0daa599b
RGS
949 if (GvIOp(PL_defoutgv))
950 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 951 if (!s)
3280af22 952 s = GvENAME(PL_defoutgv);
79072805
LW
953 sv_setpv(sv,s);
954 break;
79072805 955 case '=':
0daa599b
RGS
956 if (GvIOp(PL_defoutgv))
957 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
958 break;
959 case '-':
0daa599b
RGS
960 if (GvIOp(PL_defoutgv))
961 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
962 break;
963 case '%':
0daa599b
RGS
964 if (GvIOp(PL_defoutgv))
965 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 966 break;
79072805
LW
967 case ':':
968 break;
969 case '/':
970 break;
971 case '[':
11206fdd 972 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW
973 break;
974 case '|':
0daa599b
RGS
975 if (GvIOp(PL_defoutgv))
976 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
977 break;
978 case ',':
79072805
LW
979 break;
980 case '\\':
b2ce0fda 981 if (PL_ors_sv)
f28098ff 982 sv_copypv(sv, PL_ors_sv);
79072805 983 break;
79072805 984 case '!':
a5f75d66 985#ifdef VMS
65202027 986 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 987 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 988#else
88e89b8a 989 {
8772537c 990 const int saveerrno = errno;
65202027 991 sv_setnv(sv, (NV)errno);
88e89b8a 992#ifdef OS2
ed344e4f
IZ
993 if (errno == errno_isOS2 || errno == errno_isOS2_set)
994 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 995 else
a5f75d66 996#endif
666ea192 997 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
998 errno = saveerrno;
999 }
1000#endif
ad3296c6 1001 SvRTRIM(sv);
946ec16e 1002 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1003 break;
1004 case '<':
3280af22 1005 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1006 break;
1007 case '>':
3280af22 1008 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1009 break;
1010 case '(':
3280af22 1011 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1012 goto add_groups;
1013 case ')':
3280af22 1014 sv_setiv(sv, (IV)PL_egid);
79072805 1015 add_groups:
79072805 1016#ifdef HAS_GETGROUPS
79072805 1017 {
57d7c65e 1018 Groups_t *gary = NULL;
fb45abb2 1019 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1020 Newx(gary, num_groups, Groups_t);
1021 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1022 for (i = 0; i < num_groups; i++)
1023 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1024 Safefree(gary);
79072805 1025 }
155aba94 1026 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1027#endif
79072805 1028 break;
cd39f2b6 1029#ifndef MACOS_TRADITIONAL
79072805
LW
1030 case '0':
1031 break;
cd39f2b6 1032#endif
79072805 1033 }
a0d0e21e 1034 return 0;
79072805
LW
1035}
1036
1037int
864dbfa3 1038Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1039{
8772537c 1040 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1041
1042 if (uf && uf->uf_val)
24f81a43 1043 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1044 return 0;
1045}
1046
1047int
864dbfa3 1048Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1049{
27da23d5 1050 dVAR;
9ae3433d 1051 STRLEN len = 0, klen;
666ea192 1052 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1053 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1054 my_setenv(ptr, s);
1e422769 1055
a0d0e21e
LW
1056#ifdef DYNAMIC_ENV_FETCH
1057 /* We just undefd an environment var. Is a replacement */
1058 /* waiting in the wings? */
1059 if (!len) {
fabdb6c0
AL
1060 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1061 if (valp)
4ab59fcc 1062 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1063 }
1064#endif
1e422769 1065
39e571d4 1066#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1067 /* And you'll never guess what the dog had */
1068 /* in its mouth... */
3280af22 1069 if (PL_tainting) {
1e422769
PP
1070 MgTAINTEDDIR_off(mg);
1071#ifdef VMS
5aabfad6 1072 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1073 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1074 Stat_t sbuf;
1e422769
PP
1075 int i = 0, j = 0;
1076
6fca0082 1077 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1078 elt = eltbuf;
1e422769
PP
1079 do { /* DCL$PATH may be a search list */
1080 while (1) { /* as may dev portion of any element */
1081 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1082 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1083 cando_by_name(S_IWUSR,0,elt) ) {
1084 MgTAINTEDDIR_on(mg);
1085 return 0;
1086 }
1087 }
bd61b366 1088 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1089 *cp = '\0';
1090 if (my_trnlnm(elt, eltbuf, j++))
1091 elt = eltbuf;
1092 else
1093 break;
1094 }
1095 j = 0;
1096 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1097 }
1098#endif /* VMS */
5aabfad6 1099 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1100 const char * const strend = s + len;
463ee0b2
LW
1101
1102 while (s < strend) {
96827780 1103 char tmpbuf[256];
c623ac67 1104 Stat_t st;
5f74f29c 1105 I32 i;
f5a63d97
AL
1106#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1107 const char path_sep = '|';
1108#else
1109 const char path_sep = ':';
1110#endif
96827780 1111 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1112 s, strend, path_sep, &i);
463ee0b2 1113 s++;
bb7a0f54 1114 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1115#ifdef VMS
1116 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1117#else
1118 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1119#endif
c6ed36e1 1120 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1121 MgTAINTEDDIR_on(mg);
1e422769
PP
1122 return 0;
1123 }
463ee0b2 1124 }
79072805
LW
1125 }
1126 }
39e571d4 1127#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1128
79072805
LW
1129 return 0;
1130}
1131
1132int
864dbfa3 1133Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1134{
8772537c 1135 PERL_UNUSED_ARG(sv);
bd61b366 1136 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1137 return 0;
1138}
1139
88e89b8a 1140int
864dbfa3 1141Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1142{
97aff369 1143 dVAR;
65e66c80 1144 PERL_UNUSED_ARG(mg);
b0269e46 1145#if defined(VMS)
cea2e8a9 1146 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1147#else
3280af22 1148 if (PL_localizing) {
fb73857a 1149 HE* entry;
b0269e46 1150 my_clearenv();
fb73857a 1151 hv_iterinit((HV*)sv);
155aba94 1152 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1153 I32 keylen;
1154 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1155 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1156 }
1157 }
1158#endif
1159 return 0;
1160}
1161
1162int
864dbfa3 1163Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1164{
27da23d5 1165 dVAR;
8772537c
AL
1166 PERL_UNUSED_ARG(sv);
1167 PERL_UNUSED_ARG(mg);
b0269e46
AB
1168#if defined(VMS)
1169 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1170#else
1171 my_clearenv();
1172#endif
3e3baf6d 1173 return 0;
66b1d557
HM
1174}
1175
64ca3a65 1176#ifndef PERL_MICRO
2d4fcd5e
AJ
1177#ifdef HAS_SIGPROCMASK
1178static void
1179restore_sigmask(pTHX_ SV *save_sv)
1180{
0bd48802 1181 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1182 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1183}
1184#endif
66b1d557 1185int
864dbfa3 1186Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1187{
97aff369 1188 dVAR;
88e89b8a 1189 /* Are we fetching a signal entry? */
8772537c 1190 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1191 if (i > 0) {
22c35a8c
GS
1192 if(PL_psig_ptr[i])
1193 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1194 else {
46da273f 1195 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1196#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1197 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1198 sigstate = SIG_IGN;
2e34cc90
CL
1199#endif
1200#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1201 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1202 sigstate = SIG_DFL;
85b332e2 1203#endif
88e89b8a 1204 /* cache state so we don't fetch it again */
8aad04aa 1205 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1206 sv_setpvs(sv,"IGNORE");
88e89b8a 1207 else
3280af22 1208 sv_setsv(sv,&PL_sv_undef);
46da273f 1209 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1210 SvTEMP_off(sv);
1211 }
1212 }
1213 return 0;
1214}
1215int
864dbfa3 1216Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1217{
2d4fcd5e
AJ
1218 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1219 * refactoring might be in order.
1220 */
27da23d5 1221 dVAR;
8772537c
AL
1222 register const char * const s = MgPV_nolen_const(mg);
1223 PERL_UNUSED_ARG(sv);
2d4fcd5e 1224 if (*s == '_') {
cbbf8932 1225 SV** svp = NULL;
2d4fcd5e
AJ
1226 if (strEQ(s,"__DIE__"))
1227 svp = &PL_diehook;
b274dc4e 1228 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
2d4fcd5e 1229 svp = &PL_warnhook;
27da23d5 1230 if (svp && *svp) {
b274dc4e 1231 SV *const to_dec = *svp;
cbbf8932 1232 *svp = NULL;
b274dc4e 1233 SvREFCNT_dec(to_dec);
2d4fcd5e
AJ
1234 }
1235 }
1236 else {
2d4fcd5e 1237 /* Are we clearing a signal entry? */
8772537c 1238 const I32 i = whichsig(s);
e02bfb16 1239 if (i > 0) {
2d4fcd5e
AJ
1240#ifdef HAS_SIGPROCMASK
1241 sigset_t set, save;
1242 SV* save_sv;
1243 /* Avoid having the signal arrive at a bad time, if possible. */
1244 sigemptyset(&set);
1245 sigaddset(&set,i);
1246 sigprocmask(SIG_BLOCK, &set, &save);
1247 ENTER;
1248 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1249 SAVEFREESV(save_sv);
1250 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1251#endif
1252 PERL_ASYNC_CHECK();
1253#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1254 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1255#endif
1256#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1257 PL_sig_defaulting[i] = 1;
5c1546dc 1258 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1259#else
8aad04aa 1260 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1261#endif
1262 if(PL_psig_name[i]) {
1263 SvREFCNT_dec(PL_psig_name[i]);
1264 PL_psig_name[i]=0;
1265 }
1266 if(PL_psig_ptr[i]) {
6136c704 1267 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1268 PL_psig_ptr[i]=0;
1269 LEAVE;
1270 SvREFCNT_dec(to_dec);
1271 }
1272 else
1273 LEAVE;
1274 }
88e89b8a
PP
1275 }
1276 return 0;
1277}
3d37d572 1278
acd15b85
CB
1279/*
1280 * The signal handling nomenclature has gotten a bit confusing since the advent of
1281 * safe signals. S_raise_signal only raises signals by analogy with what the
1282 * underlying system's signal mechanism does. It might be more proper to say that
1283 * it defers signals that have already been raised and caught.
1284 *
1285 * PL_sig_pending and PL_psig_pend likewise do not track signals that are pending
1286 * in the sense of being on the system's signal queue in between raising and delivery.
1287 * They are only pending on Perl's deferral list, i.e., they track deferred signals
1288 * awaiting delivery after the current Perl opcode completes and say nothing about
1289 * signals raised but not yet caught in the underlying signal implementation.
1290 */
1291
2563cec5
IZ
1292#ifndef SIG_PENDING_DIE_COUNT
1293# define SIG_PENDING_DIE_COUNT 120
1294#endif
1295
dd374669
AL
1296static void
1297S_raise_signal(pTHX_ int sig)
0a8e0eff 1298{
97aff369 1299 dVAR;
0a8e0eff
NIS
1300 /* Set a flag to say this signal is pending */
1301 PL_psig_pend[sig]++;
1302 /* And one to say _a_ signal is pending */
2563cec5
IZ
1303 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1304 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1305 (unsigned long)SIG_PENDING_DIE_COUNT);
0a8e0eff
NIS
1306}
1307
1308Signal_t
8aad04aa
JH
1309#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1310Perl_csighandler(int sig, ...)
1311#else
0a8e0eff 1312Perl_csighandler(int sig)
8aad04aa 1313#endif
0a8e0eff 1314{
1018e26f
NIS
1315#ifdef PERL_GET_SIG_CONTEXT
1316 dTHXa(PERL_GET_SIG_CONTEXT);
1317#else
85b332e2
CL
1318 dTHX;
1319#endif
23ada85b 1320#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1321 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1322 if (PL_sig_ignoring[sig]) return;
85b332e2 1323#endif
2e34cc90 1324#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1325 if (PL_sig_defaulting[sig])
2e34cc90
CL
1326#ifdef KILL_BY_SIGPRC
1327 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1328#else
1329 exit(1);
1330#endif
1331#endif
853d2c32
RGS
1332 if (
1333#ifdef SIGILL
1334 sig == SIGILL ||
1335#endif
1336#ifdef SIGBUS
1337 sig == SIGBUS ||
1338#endif
1339#ifdef SIGSEGV
1340 sig == SIGSEGV ||
1341#endif
1342 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3
JH
1343 /* Call the perl level handler now--
1344 * with risk we may be in malloc() etc. */
1345 (*PL_sighandlerp)(sig);
1346 else
dd374669 1347 S_raise_signal(aTHX_ sig);
0a8e0eff
NIS
1348}
1349
2e34cc90
CL
1350#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1351void
1352Perl_csighandler_init(void)
1353{
1354 int sig;
27da23d5 1355 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1356
1357 for (sig = 1; sig < SIG_SIZE; sig++) {
1358#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1359 dTHX;
27da23d5 1360 PL_sig_defaulting[sig] = 1;
5c1546dc 1361 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1362#endif
1363#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1364 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1365#endif
1366 }
27da23d5 1367 PL_sig_handlers_initted = 1;
2e34cc90
CL
1368}
1369#endif
1370
0a8e0eff
NIS
1371void
1372Perl_despatch_signals(pTHX)
1373{
97aff369 1374 dVAR;
0a8e0eff
NIS
1375 int sig;
1376 PL_sig_pending = 0;
1377 for (sig = 1; sig < SIG_SIZE; sig++) {
1378 if (PL_psig_pend[sig]) {
25da4428
JH
1379 PERL_BLOCKSIG_ADD(set, sig);
1380 PL_psig_pend[sig] = 0;
1381 PERL_BLOCKSIG_BLOCK(set);
f5203343 1382 (*PL_sighandlerp)(sig);
25da4428 1383 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1384 }
1385 }
1386}
1387
85e6fe83 1388int
864dbfa3 1389Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1390{
27da23d5 1391 dVAR;
79072805 1392 I32 i;
cbbf8932 1393 SV** svp = NULL;
2d4fcd5e
AJ
1394 /* Need to be careful with SvREFCNT_dec(), because that can have side
1395 * effects (due to closures). We must make sure that the new disposition
1396 * is in place before it is called.
1397 */
cbbf8932 1398 SV* to_dec = NULL;
e72dc28c 1399 STRLEN len;
2d4fcd5e
AJ
1400#ifdef HAS_SIGPROCMASK
1401 sigset_t set, save;
1402 SV* save_sv;
1403#endif
a0d0e21e 1404
d5263905 1405 register const char *s = MgPV_const(mg,len);
748a9306
LW
1406 if (*s == '_') {
1407 if (strEQ(s,"__DIE__"))
3280af22 1408 svp = &PL_diehook;
748a9306 1409 else if (strEQ(s,"__WARN__"))
3280af22 1410 svp = &PL_warnhook;
748a9306 1411 else
cea2e8a9 1412 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1413 i = 0;
4633a7c4 1414 if (*svp) {
9289f461
RGS
1415 if (*svp != PERL_WARNHOOK_FATAL)
1416 to_dec = *svp;
cbbf8932 1417 *svp = NULL;
4633a7c4 1418 }
748a9306
LW
1419 }
1420 else {
1421 i = whichsig(s); /* ...no, a brick */
86d86cad 1422 if (i <= 0) {
e476b1b5 1423 if (ckWARN(WARN_SIGNAL))
9014280d 1424 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1425 return 0;
1426 }
2d4fcd5e
AJ
1427#ifdef HAS_SIGPROCMASK
1428 /* Avoid having the signal arrive at a bad time, if possible. */
1429 sigemptyset(&set);
1430 sigaddset(&set,i);
1431 sigprocmask(SIG_BLOCK, &set, &save);
1432 ENTER;
1433 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1434 SAVEFREESV(save_sv);
1435 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1436#endif
1437 PERL_ASYNC_CHECK();
2e34cc90 1438#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1439 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1440#endif
23ada85b 1441#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1442 PL_sig_ignoring[i] = 0;
85b332e2 1443#endif
2e34cc90 1444#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1445 PL_sig_defaulting[i] = 0;
2e34cc90 1446#endif
22c35a8c 1447 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1448 to_dec = PL_psig_ptr[i];
46da273f 1449 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1450 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1451 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1452 SvREADONLY_on(PL_psig_name[i]);
748a9306 1453 }
a0d0e21e 1454 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1455 if (i) {
5c1546dc 1456 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1457#ifdef HAS_SIGPROCMASK
1458 LEAVE;
1459#endif
1460 }
748a9306 1461 else
b37c2d43 1462 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1463 if(to_dec)
1464 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1465 return 0;
1466 }
baf38871 1467 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
748a9306 1468 if (strEQ(s,"IGNORE")) {
85b332e2 1469 if (i) {
23ada85b 1470#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1471 PL_sig_ignoring[i] = 1;
5c1546dc 1472 (void)rsignal(i, PL_csighandlerp);
85b332e2 1473#else
8aad04aa 1474 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1475#endif
2d4fcd5e 1476 }
748a9306
LW
1477 }
1478 else if (strEQ(s,"DEFAULT") || !*s) {
1479 if (i)
2e34cc90
CL
1480#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1481 {
27da23d5 1482 PL_sig_defaulting[i] = 1;
5c1546dc 1483 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1484 }
1485#else
8aad04aa 1486 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1487#endif
748a9306 1488 }
79072805 1489 else {
5aabfad6
PP
1490 /*
1491 * We should warn if HINT_STRICT_REFS, but without
1492 * access to a known hint bit in a known OP, we can't
1493 * tell whether HINT_STRICT_REFS is in force or not.
1494 */
46fc3d4c 1495 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1496 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1497 if (i)
5c1546dc 1498 (void)rsignal(i, PL_csighandlerp);
748a9306 1499 else
46da273f 1500 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1501 }
2d4fcd5e
AJ
1502#ifdef HAS_SIGPROCMASK
1503 if(i)
1504 LEAVE;
1505#endif
1506 if(to_dec)
1507 SvREFCNT_dec(to_dec);
79072805
LW
1508 return 0;
1509}
64ca3a65 1510#endif /* !PERL_MICRO */
79072805
LW
1511
1512int
864dbfa3 1513Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1514{
97aff369 1515 dVAR;
08aeb9f7 1516 HV* stash;
8772537c 1517 PERL_UNUSED_ARG(sv);
e1a479c5 1518
08aeb9f7
BB
1519 /* Bail out if destruction is going on */
1520 if(PL_dirty) return 0;
1521
e1a479c5
BB
1522 /* The first case occurs via setisa,
1523 the second via setisa_elem, which
1524 calls this same magic */
08aeb9f7
BB
1525 stash = GvSTASH(
1526 SvTYPE(mg->mg_obj) == SVt_PVGV
1527 ? (GV*)mg->mg_obj
1528 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
e1a479c5
BB
1529 );
1530
08aeb9f7
BB
1531 if(PL_delaymagic)
1532 PL_delayedisa = stash;
1533 else
1534 mro_isa_changed_in(stash);
1535
463ee0b2
LW
1536 return 0;
1537}
1538
1539int
864dbfa3 1540Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1541{
97aff369 1542 dVAR;
8772537c
AL
1543 PERL_UNUSED_ARG(sv);
1544 PERL_UNUSED_ARG(mg);
3280af22 1545 PL_amagic_generation++;
463ee0b2 1546
a0d0e21e
LW
1547 return 0;
1548}
463ee0b2 1549
946ec16e 1550int
864dbfa3 1551Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1552{
dd374669 1553 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1554 I32 i = 0;
8772537c 1555 PERL_UNUSED_ARG(mg);
7719e241 1556
6ff81951 1557 if (hv) {
497b47a8
JH
1558 (void) hv_iterinit(hv);
1559 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1560 i = HvKEYS(hv);
1561 else {
1562 while (hv_iternext(hv))
1563 i++;
1564 }
6ff81951
GS
1565 }
1566
1567 sv_setiv(sv, (IV)i);
1568 return 0;
1569}
1570
1571int
864dbfa3 1572Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1573{
8772537c 1574 PERL_UNUSED_ARG(mg);
946ec16e
PP
1575 if (LvTARG(sv)) {
1576 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1577 }
1578 return 0;
ac27b0f5 1579}
946ec16e 1580
e336de0d 1581/* caller is responsible for stack switching/cleanup */
565764a8 1582STATIC int
e1ec3a88 1583S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1584{
97aff369 1585 dVAR;
a0d0e21e 1586 dSP;
463ee0b2 1587
924508f0
GS
1588 PUSHMARK(SP);
1589 EXTEND(SP, n);
33c27489 1590 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1591 if (n > 1) {
93965878 1592 if (mg->mg_ptr) {
565764a8 1593 if (mg->mg_len >= 0)
79cb57f6 1594 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1595 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1596 PUSHs((SV*)mg->mg_ptr);
1597 }
14befaf4 1598 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1599 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1600 }
1601 }
1602 if (n > 2) {
1603 PUSHs(val);
88e89b8a 1604 }
463ee0b2
LW
1605 PUTBACK;
1606
864dbfa3 1607 return call_method(meth, flags);
946ec16e
PP
1608}
1609
76e3520e 1610STATIC int
e1ec3a88 1611S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1612{
27da23d5 1613 dVAR; dSP;
463ee0b2 1614
a0d0e21e
LW
1615 ENTER;
1616 SAVETMPS;
e788e7d3 1617 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1618
33c27489 1619 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1620 sv_setsv(sv, *PL_stack_sp--);
93965878 1621 }
463ee0b2 1622
d3acc0f7 1623 POPSTACK;
a0d0e21e
LW
1624 FREETMPS;
1625 LEAVE;
1626 return 0;
1627}
463ee0b2 1628
a0d0e21e 1629int
864dbfa3 1630Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1631{
a0d0e21e
LW
1632 if (mg->mg_ptr)
1633 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1634 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1635 return 0;
1636}
1637
1638int
864dbfa3 1639Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1640{
27da23d5 1641 dVAR; dSP;
a60c0954 1642 ENTER;
e788e7d3 1643 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1644 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1645 POPSTACK;
a60c0954 1646 LEAVE;
463ee0b2
LW
1647 return 0;
1648}
1649
1650int
864dbfa3 1651Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1652{
a0d0e21e
LW
1653 return magic_methpack(sv,mg,"DELETE");
1654}
463ee0b2 1655
93965878
NIS
1656
1657U32
864dbfa3 1658Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1659{
27da23d5 1660 dVAR; dSP;
22846ab4 1661 I32 retval = 0;
93965878
NIS
1662
1663 ENTER;
1664 SAVETMPS;
e788e7d3 1665 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1666 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1667 sv = *PL_stack_sp--;
22846ab4
AB
1668 retval = SvIV(sv)-1;
1669 if (retval < -1)
1670 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1671 }
d3acc0f7 1672 POPSTACK;
93965878
NIS
1673 FREETMPS;
1674 LEAVE;
22846ab4 1675 return (U32) retval;
93965878
NIS
1676}
1677
cea2e8a9
GS
1678int
1679Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1680{
27da23d5 1681 dVAR; dSP;
463ee0b2 1682
e336de0d 1683 ENTER;
e788e7d3 1684 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1685 PUSHMARK(SP);
33c27489 1686 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1687 PUTBACK;
864dbfa3 1688 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1689 POPSTACK;
a60c0954 1690 LEAVE;
a3bcc51e 1691
463ee0b2
LW
1692 return 0;
1693}
1694
1695int
864dbfa3 1696Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1697{
27da23d5 1698 dVAR; dSP;
666ea192 1699 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1700
1701 ENTER;
a0d0e21e 1702 SAVETMPS;
e788e7d3 1703 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1704 PUSHMARK(SP);
1705 EXTEND(SP, 2);
33c27489 1706 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1707 if (SvOK(key))
1708 PUSHs(key);
1709 PUTBACK;
1710
864dbfa3 1711 if (call_method(meth, G_SCALAR))
3280af22 1712 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1713
d3acc0f7 1714 POPSTACK;
a0d0e21e
LW
1715 FREETMPS;
1716 LEAVE;
79072805
LW
1717 return 0;
1718}
1719
1720int
1146e912 1721Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1722{
1723 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1724}
a0d0e21e 1725
a3bcc51e
TP
1726SV *
1727Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1728{
27da23d5 1729 dVAR; dSP;
5fcbf73d 1730 SV *retval;
8772537c
AL
1731 SV * const tied = SvTIED_obj((SV*)hv, mg);
1732 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1733
1734 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1735 SV *key;
bfcb3514 1736 if (HvEITER_get(hv))
a3bcc51e
TP
1737 /* we are in an iteration so the hash cannot be empty */
1738 return &PL_sv_yes;
1739 /* no xhv_eiter so now use FIRSTKEY */
1740 key = sv_newmortal();
1741 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1742 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1743 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1744 }
1745
1746 /* there is a SCALAR method that we can call */
1747 ENTER;
1748 PUSHSTACKi(PERLSI_MAGIC);
1749 PUSHMARK(SP);
1750 EXTEND(SP, 1);
1751 PUSHs(tied);
1752 PUTBACK;
1753
1754 if (call_method("SCALAR", G_SCALAR))
1755 retval = *PL_stack_sp--;
5fcbf73d
AL
1756 else
1757 retval = &PL_sv_undef;
a3bcc51e
TP
1758 POPSTACK;
1759 LEAVE;
1760 return retval;
1761}
1762
a0d0e21e 1763int
864dbfa3 1764Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1765{
97aff369 1766 dVAR;
8772537c
AL
1767 GV * const gv = PL_DBline;
1768 const I32 i = SvTRUE(sv);
1769 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1770 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1771 if (svp && SvIOKp(*svp)) {
1772 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1773 if (o) {
1774 /* set or clear breakpoint in the relevant control op */
1775 if (i)
1776 o->op_flags |= OPf_SPECIAL;
1777 else
1778 o->op_flags &= ~OPf_SPECIAL;
1779 }
5df8de69 1780 }
79072805
LW
1781 return 0;
1782}
1783
1784int
8772537c 1785Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1786{
97aff369 1787 dVAR;
8772537c 1788 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1789 if (obj) {
fc15ae8f 1790 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1791 } else {
1792 SvOK_off(sv);
1793 }
79072805
LW
1794 return 0;
1795}
1796
1797int
864dbfa3 1798Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1799{
97aff369 1800 dVAR;
8772537c 1801 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1802 if (obj) {
fc15ae8f 1803 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1804 } else {
1805 if (ckWARN(WARN_MISC))
1806 Perl_warner(aTHX_ packWARN(WARN_MISC),
1807 "Attempt to set length of freed array");
1808 }
1809 return 0;
1810}
1811
1812int
1813Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1814{
97aff369 1815 dVAR;
53c1dcc0 1816 PERL_UNUSED_ARG(sv);
94f3782b
DM
1817 /* during global destruction, mg_obj may already have been freed */
1818 if (PL_in_clean_all)
1ea47f64 1819 return 0;
94f3782b 1820
83bf042f
NC
1821 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1822
1823 if (mg) {
1824 /* arylen scalar holds a pointer back to the array, but doesn't own a
1825 reference. Hence the we (the array) are about to go away with it
1826 still pointing at us. Clear its pointer, else it would be pointing
1827 at free memory. See the comment in sv_magic about reference loops,
1828 and why it can't own a reference to us. */
1829 mg->mg_obj = 0;
1830 }
a0d0e21e
LW
1831 return 0;
1832}
1833
1834int
864dbfa3 1835Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1836{
97aff369 1837 dVAR;
8772537c 1838 SV* const lsv = LvTARG(sv);
3881461a 1839 PERL_UNUSED_ARG(mg);
ac27b0f5 1840
a0d0e21e 1841 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1842 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1843 if (found && found->mg_len >= 0) {
1844 I32 i = found->mg_len;
7e2040f0 1845 if (DO_UTF8(lsv))
a0ed51b3 1846 sv_pos_b2u(lsv, &i);
fc15ae8f 1847 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1848 return 0;
1849 }
1850 }
0c34ef67 1851 SvOK_off(sv);
a0d0e21e
LW
1852 return 0;
1853}
1854
1855int
864dbfa3 1856Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1857{
97aff369 1858 dVAR;
8772537c 1859 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1860 SSize_t pos;
1861 STRLEN len;
c00206c8 1862 STRLEN ulen = 0;
53d44271 1863 MAGIC* found;
a0d0e21e 1864
3881461a 1865 PERL_UNUSED_ARG(mg);
ac27b0f5 1866
a0d0e21e 1867 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1868 found = mg_find(lsv, PERL_MAGIC_regex_global);
1869 else
1870 found = NULL;
1871 if (!found) {
a0d0e21e
LW
1872 if (!SvOK(sv))
1873 return 0;
d83f0a82
NC
1874#ifdef PERL_OLD_COPY_ON_WRITE
1875 if (SvIsCOW(lsv))
1876 sv_force_normal_flags(lsv, 0);
1877#endif
3881461a 1878 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1879 NULL, 0);
a0d0e21e
LW
1880 }
1881 else if (!SvOK(sv)) {
3881461a 1882 found->mg_len = -1;
a0d0e21e
LW
1883 return 0;
1884 }
1885 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1886
fc15ae8f 1887 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1888
7e2040f0 1889 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1890 ulen = sv_len_utf8(lsv);
1891 if (ulen)
1892 len = ulen;
a0ed51b3
LW
1893 }
1894
a0d0e21e
LW
1895 if (pos < 0) {
1896 pos += len;
1897 if (pos < 0)
1898 pos = 0;
1899 }
eb160463 1900 else if (pos > (SSize_t)len)
a0d0e21e 1901 pos = len;
a0ed51b3
LW
1902
1903 if (ulen) {
1904 I32 p = pos;
1905 sv_pos_u2b(lsv, &p, 0);
1906 pos = p;
1907 }
727405f8 1908
3881461a
AL
1909 found->mg_len = pos;
1910 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1911
79072805
LW
1912 return 0;
1913}
1914
1915int
864dbfa3 1916Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
79072805 1917{
79072805 1918 GV* gv;
8772537c
AL
1919 PERL_UNUSED_ARG(mg);
1920
dd69841b
BB
1921 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1922
79072805
LW
1923 if (!SvOK(sv))
1924 return 0;
2e5b91de 1925 if (isGV_with_GP(sv)) {
180488f8
NC
1926 /* We're actually already a typeglob, so don't need the stuff below.
1927 */
1928 return 0;
1929 }
f776e3cd 1930 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
79072805
LW
1931 if (sv == (SV*)gv)
1932 return 0;
1933 if (GvGP(sv))
88e89b8a 1934 gp_free((GV*)sv);
79072805 1935 GvGP(sv) = gp_ref(GvGP(gv));
79072805
LW
1936 return 0;
1937}
1938
1939int
864dbfa3 1940Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1941{
1942 STRLEN len;
35a4481c 1943 SV * const lsv = LvTARG(sv);
b83604b4 1944 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1945 I32 offs = LvTARGOFF(sv);
1946 I32 rem = LvTARGLEN(sv);
8772537c 1947 PERL_UNUSED_ARG(mg);
6ff81951 1948
9aa983d2
JH
1949 if (SvUTF8(lsv))
1950 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1951 if (offs > (I32)len)
6ff81951 1952 offs = len;
eb160463 1953 if (rem + offs > (I32)len)
6ff81951
GS
1954 rem = len - offs;
1955 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1956 if (SvUTF8(lsv))
2ef4b674 1957 SvUTF8_on(sv);
6ff81951
GS
1958 return 0;
1959}
1960
1961int
864dbfa3 1962Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1963{
97aff369 1964 dVAR;
9aa983d2 1965 STRLEN len;
5fcbf73d 1966 const char * const tmps = SvPV_const(sv, len);
dd374669 1967 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1968 I32 lvoff = LvTARGOFF(sv);
1969 I32 lvlen = LvTARGLEN(sv);
8772537c 1970 PERL_UNUSED_ARG(mg);
075a4a2b 1971
1aa99e6b 1972 if (DO_UTF8(sv)) {
9aa983d2
JH
1973 sv_utf8_upgrade(lsv);
1974 sv_pos_u2b(lsv, &lvoff, &lvlen);
1975 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1976 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1977 SvUTF8_on(lsv);
1978 }
9bf12eaf 1979 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1980 const char *utf8;
9aa983d2 1981 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1982 LvTARGLEN(sv) = len;
5fcbf73d
AL
1983 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1984 sv_insert(lsv, lvoff, lvlen, utf8, len);
1985 Safefree(utf8);
1aa99e6b 1986 }
b76f3ce2
GB
1987 else {
1988 sv_insert(lsv, lvoff, lvlen, tmps, len);
1989 LvTARGLEN(sv) = len;
1990 }
1991
1aa99e6b 1992
79072805
LW
1993 return 0;
1994}
1995
1996int
864dbfa3 1997Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1998{
97aff369 1999 dVAR;
8772537c 2000 PERL_UNUSED_ARG(sv);
27cc343c 2001 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
2002 return 0;
2003}
2004
2005int
864dbfa3 2006Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2007{
97aff369 2008 dVAR;
8772537c 2009 PERL_UNUSED_ARG(sv);
b01e650a
DM
2010 /* update taint status */
2011 if (PL_tainted)
2012 mg->mg_len |= 1;
2013 else
2014 mg->mg_len &= ~1;
463ee0b2
LW
2015 return 0;
2016}
2017
2018int
864dbfa3 2019Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2020{
35a4481c 2021 SV * const lsv = LvTARG(sv);
8772537c 2022 PERL_UNUSED_ARG(mg);
6ff81951 2023
6136c704
AL
2024 if (lsv)
2025 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2026 else
0c34ef67 2027 SvOK_off(sv);
6ff81951 2028
6ff81951
GS
2029 return 0;
2030}
2031
2032int
864dbfa3 2033Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2034{
8772537c 2035 PERL_UNUSED_ARG(mg);
79072805
LW
2036 do_vecset(sv); /* XXX slurp this routine */
2037 return 0;
2038}
2039
2040int
864dbfa3 2041Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2042{
97aff369 2043 dVAR;
a0714e2c 2044 SV *targ = NULL;
5f05dabc 2045 if (LvTARGLEN(sv)) {
68dc0745 2046 if (mg->mg_obj) {
8772537c
AL
2047 SV * const ahv = LvTARG(sv);
2048 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2049 if (he)
2050 targ = HeVAL(he);
68dc0745
PP
2051 }
2052 else {
8772537c 2053 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2054 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2055 targ = AvARRAY(av)[LvTARGOFF(sv)];
2056 }
46da273f 2057 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2058 /* somebody else defined it for us */
2059 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2060 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2061 LvTARGLEN(sv) = 0;
2062 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2063 mg->mg_obj = NULL;
68dc0745
PP
2064 mg->mg_flags &= ~MGf_REFCOUNTED;
2065 }
5f05dabc 2066 }
71be2cbc
PP
2067 else
2068 targ = LvTARG(sv);
3280af22 2069 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2070 return 0;
2071}
2072
2073int
864dbfa3 2074Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2075{
8772537c 2076 PERL_UNUSED_ARG(mg);
71be2cbc 2077 if (LvTARGLEN(sv))
68dc0745
PP
2078 vivify_defelem(sv);
2079 if (LvTARG(sv)) {
5f05dabc 2080 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2081 SvSETMAGIC(LvTARG(sv));
2082 }
5f05dabc
PP
2083 return 0;
2084}
2085
71be2cbc 2086void
864dbfa3 2087Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2088{
97aff369 2089 dVAR;
74e13ce4 2090 MAGIC *mg;
a0714e2c 2091 SV *value = NULL;
71be2cbc 2092
14befaf4 2093 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2094 return;
68dc0745 2095 if (mg->mg_obj) {
8772537c
AL
2096 SV * const ahv = LvTARG(sv);
2097 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2098 if (he)
2099 value = HeVAL(he);
3280af22 2100 if (!value || value == &PL_sv_undef)
be2597df 2101 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2102 }
68dc0745 2103 else {
8772537c 2104 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2105 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2106 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2107 else {
d4c19fe8 2108 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2109 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2110 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2111 }
2112 }
b37c2d43 2113 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2114 SvREFCNT_dec(LvTARG(sv));
2115 LvTARG(sv) = value;
71be2cbc 2116 LvTARGLEN(sv) = 0;
68dc0745 2117 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2118 mg->mg_obj = NULL;
68dc0745 2119 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2120}
2121
2122int
864dbfa3 2123Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2124{
86f55936 2125 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2126}
2127
2128int
864dbfa3 2129Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2130{
96a5add6 2131 PERL_UNUSED_CONTEXT;
565764a8 2132 mg->mg_len = -1;
c6496cc7 2133 SvSCREAM_off(sv);
93a17b20
LW
2134 return 0;
2135}
2136
2137int
864dbfa3 2138Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
79072805 2139{
8772537c 2140 PERL_UNUSED_ARG(mg);
14befaf4 2141 sv_unmagic(sv, PERL_MAGIC_bm);
b84d1fce 2142 SvTAIL_off(sv);
79072805
LW
2143 SvVALID_off(sv);
2144 return 0;
2145}
2146
2147int
864dbfa3 2148Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
55497cff 2149{
8772537c 2150 PERL_UNUSED_ARG(mg);
14befaf4 2151 sv_unmagic(sv, PERL_MAGIC_fm);
55497cff
PP
2152 SvCOMPILED_off(sv);
2153 return 0;
2154}
2155
2156int
864dbfa3 2157Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2158{
35a4481c 2159 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2160
2161 if (uf && uf->uf_set)
24f81a43 2162 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2163 return 0;
2164}
2165
c277df42 2166int
faf82a0b
AE
2167Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2168{
8772537c 2169 PERL_UNUSED_ARG(mg);
faf82a0b
AE
2170 sv_unmagic(sv, PERL_MAGIC_qr);
2171 return 0;
2172}
2173
2174int
864dbfa3 2175Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
c277df42 2176{
97aff369 2177 dVAR;
8772537c
AL
2178 regexp * const re = (regexp *)mg->mg_obj;
2179 PERL_UNUSED_ARG(sv);
2180
c277df42
IZ
2181 ReREFCNT_dec(re);
2182 return 0;
2183}
2184
7a4c00b4 2185#ifdef USE_LOCALE_COLLATE
79072805 2186int
864dbfa3 2187Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2188{
2189 /*
838b5b74 2190 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2191 * and vanished with a faint plop.
2192 */
96a5add6 2193 PERL_UNUSED_CONTEXT;
8772537c 2194 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2195 if (mg->mg_ptr) {
2196 Safefree(mg->mg_ptr);
2197 mg->mg_ptr = NULL;
565764a8 2198 mg->mg_len = -1;
7a4c00b4 2199 }
bbce6d69
PP
2200 return 0;
2201}
7a4c00b4 2202#endif /* USE_LOCALE_COLLATE */
bbce6d69 2203
7e8c5dac
HS
2204/* Just clear the UTF-8 cache data. */
2205int
2206Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2207{
96a5add6 2208 PERL_UNUSED_CONTEXT;
8772537c 2209 PERL_UNUSED_ARG(sv);
7e8c5dac 2210 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2211 mg->mg_ptr = NULL;
7e8c5dac
HS
2212 mg->mg_len = -1; /* The mg_len holds the len cache. */
2213 return 0;
2214}
2215
bbce6d69 2216int
864dbfa3 2217Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2218{
97aff369 2219 dVAR;
e1ec3a88 2220 register const char *s;
2fdbfb4d
AB
2221 register I32 paren;
2222 register const REGEXP * rx;
2223 const char * const remaining = mg->mg_ptr + 1;
79072805 2224 I32 i;
8990e307 2225 STRLEN len;
2fdbfb4d 2226
79072805 2227 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2228 case '\015': /* $^MATCH */
2229 if (strEQ(remaining, "ATCH"))
2230 goto do_match;
2231 case '`': /* ${^PREMATCH} caught below */
2232 do_prematch:
2233 paren = -2;
2234 goto setparen;
2235 case '\'': /* ${^POSTMATCH} caught below */
2236 do_postmatch:
2237 paren = -1;
2238 goto setparen;
2239 case '&':
2240 do_match:
2241 paren = 0;
2242 goto setparen;
2243 case '1': case '2': case '3': case '4':
2244 case '5': case '6': case '7': case '8': case '9':
2245 setparen:
2246 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2247 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2248 break;
2249 } else {
2250 /* Croak with a READONLY error when a numbered match var is
2251 * set without a previous pattern match. Unless it's C<local $1>
2252 */
2253 if (!PL_localizing) {
2254 Perl_croak(aTHX_ PL_no_modify);
2255 }
2256 }
748a9306 2257 case '\001': /* ^A */
3280af22 2258 sv_setsv(PL_bodytarget, sv);
748a9306 2259 break;
49460fe6 2260 case '\003': /* ^C */
38ab35f8 2261 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2262 break;
2263
79072805 2264 case '\004': /* ^D */
b4ab917c 2265#ifdef DEBUGGING
b83604b4 2266 s = SvPV_nolen_const(sv);
ddcf8bc1 2267 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2268 DEBUG_x(dump_all());
b4ab917c 2269#else
38ab35f8 2270 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2271#endif
79072805 2272 break;
28f23441 2273 case '\005': /* ^E */
d0063567 2274 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2275#ifdef MACOS_TRADITIONAL
38ab35f8 2276 gMacPerl_OSErr = SvIV(sv);
28f23441 2277#else
cd39f2b6 2278# ifdef VMS
38ab35f8 2279 set_vaxc_errno(SvIV(sv));
048c1ddf 2280# else
cd39f2b6 2281# ifdef WIN32
d0063567 2282 SetLastError( SvIV(sv) );
cd39f2b6 2283# else
9fed8b87 2284# ifdef OS2
38ab35f8 2285 os2_setsyserrno(SvIV(sv));
9fed8b87 2286# else
d0063567 2287 /* will anyone ever use this? */
38ab35f8 2288 SETERRNO(SvIV(sv), 4);
cd39f2b6 2289# endif
048c1ddf
IZ
2290# endif
2291# endif
22fae026 2292#endif
d0063567
DK
2293 }
2294 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2295 if (PL_encoding)
2296 SvREFCNT_dec(PL_encoding);
2297 if (SvOK(sv) || SvGMAGICAL(sv)) {
2298 PL_encoding = newSVsv(sv);
2299 }
2300 else {
a0714e2c 2301 PL_encoding = NULL;
d0063567
DK
2302 }
2303 }
2304 break;
79072805 2305 case '\006': /* ^F */
38ab35f8 2306 PL_maxsysfd = SvIV(sv);
79072805 2307 break;
a0d0e21e 2308 case '\010': /* ^H */
38ab35f8 2309 PL_hints = SvIV(sv);
a0d0e21e 2310 break;
9d116dd7 2311 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2312 Safefree(PL_inplace);
bd61b366 2313 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2314 break;
28f23441 2315 case '\017': /* ^O */
ac27b0f5 2316 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2317 Safefree(PL_osname);
bd61b366 2318 PL_osname = NULL;
3511154c
DM
2319 if (SvOK(sv)) {
2320 TAINT_PROPER("assigning to $^O");
2e0de35c 2321 PL_osname = savesvpv(sv);
3511154c 2322 }
ac27b0f5
NIS
2323 }
2324 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2325 STRLEN len;
2326 const char *const start = SvPV(sv, len);
b54fc2b6 2327 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2328 SV *tmp;
2329 struct refcounted_he *tmp_he;
2330
2331
2332 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2333 PL_hints
2334 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2335
2336 /* Opening for input is more common than opening for output, so
2337 ensure that hints for input are sooner on linked list. */
2338 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2339 : newSVpvs(""));
2340 SvFLAGS(tmp) |= SvUTF8(sv);
2341
2342 tmp_he
2343 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2344 sv_2mortal(newSVpvs("open>")), tmp);
2345
2346 /* The UTF-8 setting is carried over */
2347 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2348
11bcd5da 2349 PL_compiling.cop_hints_hash
8b850bd5
NC
2350 = Perl_refcounted_he_new(aTHX_ tmp_he,
2351 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2352 }
28f23441 2353 break;
79072805 2354 case '\020': /* ^P */
2fdbfb4d
AB
2355 if (*remaining == '\0') { /* ^P */
2356 PL_perldb = SvIV(sv);
2357 if (PL_perldb && !PL_DBsingle)
2358 init_debugger();
2359 break;
2360 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2361 goto do_prematch;
2362 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2363 goto do_postmatch;
2364 }
79072805 2365 case '\024': /* ^T */
88e89b8a 2366#ifdef BIG_TIME
6b88bc9c 2367 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2368#else
38ab35f8 2369 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2370#endif
79072805 2371 break;
e07ea26a
NC
2372 case '\025': /* ^UTF8CACHE */
2373 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2374 PL_utf8cache = (signed char) sv_2iv(sv);
2375 }
2376 break;
fde18df1 2377 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2378 if (*(mg->mg_ptr+1) == '\0') {
2379 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2380 i = SvIV(sv);
ac27b0f5 2381 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2382 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2383 }
599cee73 2384 }
0a378802 2385 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2386 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2387 if (!SvPOK(sv) && PL_localizing) {
2388 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2389 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2390 break;
2391 }
f4fc7782 2392 {
b5477537 2393 STRLEN len, i;
d3a7d8c7 2394 int accumulate = 0 ;
f4fc7782 2395 int any_fatals = 0 ;
b83604b4 2396 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2397 for (i = 0 ; i < len ; ++i) {
2398 accumulate |= ptr[i] ;
2399 any_fatals |= (ptr[i] & 0xAA) ;
2400 }
4243c432
NC
2401 if (!accumulate) {
2402 if (!specialWARN(PL_compiling.cop_warnings))
2403 PerlMemShared_free(PL_compiling.cop_warnings);
2404 PL_compiling.cop_warnings = pWARN_NONE;
2405 }
72dc9ed5
NC
2406 /* Yuck. I can't see how to abstract this: */
2407 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2408 WARN_ALL) && !any_fatals) {
4243c432
NC
2409 if (!specialWARN(PL_compiling.cop_warnings))
2410 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2411 PL_compiling.cop_warnings = pWARN_ALL;
2412 PL_dowarn |= G_WARN_ONCE ;
727405f8 2413 }
d3a7d8c7 2414 else {
72dc9ed5
NC
2415 STRLEN len;
2416 const char *const p = SvPV_const(sv, len);
2417
2418 PL_compiling.cop_warnings
8ee4cf24 2419 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2420 p, len);
2421
d3a7d8c7
GS
2422 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2423 PL_dowarn |= G_WARN_ONCE ;
2424 }
f4fc7782 2425
d3a7d8c7 2426 }
4438c4b7 2427 }
971a9dd3 2428 }
79072805
LW
2429 break;
2430 case '.':
3280af22
NIS
2431 if (PL_localizing) {
2432 if (PL_localizing == 1)
7766f137 2433 SAVESPTR(PL_last_in_gv);
748a9306 2434 }
3280af22 2435 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2436 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2437 break;
2438 case '^':
3280af22 2439 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2440 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2441 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2442 break;
2443 case '~':
3280af22 2444 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2445 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2446 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2447 break;
2448 case '=':
38ab35f8 2449 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2450 break;
2451 case '-':
38ab35f8 2452 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2453 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2454 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2455 break;
2456 case '%':
38ab35f8 2457 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2458 break;
2459 case '|':
4b65379b 2460 {
8772537c 2461 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2462 if(!io)
2463 break;
38ab35f8 2464 if ((SvIV(sv)) == 0)
4b65379b
CS
2465 IoFLAGS(io) &= ~IOf_FLUSH;
2466 else {
2467 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2468 PerlIO *ofp = IoOFP(io);
2469 if (ofp)
2470 (void)PerlIO_flush(ofp);
2471 IoFLAGS(io) |= IOf_FLUSH;
2472 }
2473 }
79072805
LW
2474 }
2475 break;
79072805 2476 case '/':
3280af22 2477 SvREFCNT_dec(PL_rs);
8bfdd7d9 2478 PL_rs = newSVsv(sv);
79072805
LW
2479 break;
2480 case '\\':
7889fe52
NIS
2481 if (PL_ors_sv)
2482 SvREFCNT_dec(PL_ors_sv);
009c130f 2483 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2484 PL_ors_sv = newSVsv(sv);
009c130f 2485 }
e3c19b7b 2486 else {
a0714e2c 2487 PL_ors_sv = NULL;
e3c19b7b 2488 }
79072805
LW
2489 break;
2490 case ',':
7889fe52
NIS
2491 if (PL_ofs_sv)
2492 SvREFCNT_dec(PL_ofs_sv);
2493 if (SvOK(sv) || SvGMAGICAL(sv)) {
2494 PL_ofs_sv = newSVsv(sv);
2495 }
2496 else {
a0714e2c 2497 PL_ofs_sv = NULL;
7889fe52 2498 }
79072805 2499 break;
79072805 2500 case '[':
38ab35f8 2501 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2502 break;
2503 case '?':
ff0cee69 2504#ifdef COMPLEX_STATUS
6b88bc9c
GS
2505 if (PL_localizing == 2) {
2506 PL_statusvalue = LvTARGOFF(sv);
2507 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2508 }
2509 else
2510#endif
2511#ifdef VMSISH_STATUS
2512 if (VMSISH_STATUS)
fb38d079 2513 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2514 else
2515#endif
38ab35f8 2516 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2517 break;
2518 case '!':
93189314
JH
2519 {
2520#ifdef VMS
2521# define PERL_VMS_BANG vaxc$errno
2522#else
2523# define PERL_VMS_BANG 0
2524#endif
91487cfc 2525 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2526 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2527 }
79072805
LW
2528 break;
2529 case '<':
38ab35f8 2530 PL_uid = SvIV(sv);
3280af22
NIS
2531 if (PL_delaymagic) {
2532 PL_delaymagic |= DM_RUID;
79072805
LW
2533 break; /* don't do magic till later */
2534 }
2535#ifdef HAS_SETRUID
b28d0864 2536 (void)setruid((Uid_t)PL_uid);
79072805
LW
2537#else
2538#ifdef HAS_SETREUID
3280af22 2539 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2540#else
85e6fe83 2541#ifdef HAS_SETRESUID
b28d0864 2542 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2543#else
75870ed3 2544 if (PL_uid == PL_euid) { /* special case $< = $> */
2545#ifdef PERL_DARWIN
2546 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2547 if (PL_uid != 0 && PerlProc_getuid() == 0)
2548 (void)PerlProc_setuid(0);
2549#endif
b28d0864 2550 (void)PerlProc_setuid(PL_uid);
75870ed3 2551 } else {
d8eceb89 2552 PL_uid = PerlProc_getuid();
cea2e8a9 2553 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2554 }
79072805
LW
2555#endif
2556#endif
85e6fe83 2557#endif
d8eceb89 2558 PL_uid = PerlProc_getuid();
3280af22 2559 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2560 break;
2561 case '>':
38ab35f8 2562 PL_euid = SvIV(sv);
3280af22
NIS
2563 if (PL_delaymagic) {
2564 PL_delaymagic |= DM_EUID;
79072805
LW
2565 break; /* don't do magic till later */
2566 }
2567#ifdef HAS_SETEUID
3280af22 2568 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2569#else
2570#ifdef HAS_SETREUID
b28d0864 2571 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2572#else
2573#ifdef HAS_SETRESUID
6b88bc9c 2574 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2575#else
b28d0864
NIS
2576 if (PL_euid == PL_uid) /* special case $> = $< */
2577 PerlProc_setuid(PL_euid);
a0d0e21e 2578 else {
e8ee3774 2579 PL_euid = PerlProc_geteuid();
cea2e8a9 2580 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2581 }
79072805
LW
2582#endif
2583#endif
85e6fe83 2584#endif
d8eceb89 2585 PL_euid = PerlProc_geteuid();
3280af22 2586 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2587 break;
2588 case '(':
38ab35f8 2589 PL_gid = SvIV(sv);
3280af22
NIS
2590 if (PL_delaymagic) {
2591 PL_delaymagic |= DM_RGID;
79072805
LW
2592 break; /* don't do magic till later */
2593 }
2594#ifdef HAS_SETRGID
b28d0864 2595 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2596#else
2597#ifdef HAS_SETREGID
3280af22 2598 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2599#else
2600#ifdef HAS_SETRESGID
b28d0864 2601 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2602#else
b28d0864
NIS
2603 if (PL_gid == PL_egid) /* special case $( = $) */
2604 (void)PerlProc_setgid(PL_gid);
748a9306 2605 else {
d8eceb89 2606 PL_gid = PerlProc_getgid();
cea2e8a9 2607 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2608 }
79072805
LW
2609#endif
2610#endif
85e6fe83 2611#endif
d8eceb89 2612 PL_gid = PerlProc_getgid();
3280af22 2613 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2614 break;
2615 case ')':
5cd24f17
PP
2616#ifdef HAS_SETGROUPS
2617 {
b83604b4 2618 const char *p = SvPV_const(sv, len);
757f63d8
SP
2619 Groups_t *gary = NULL;
2620
2621 while (isSPACE(*p))
2622 ++p;
2623 PL_egid = Atol(p);
2624 for (i = 0; i < NGROUPS; ++i) {
2625 while (*p && !isSPACE(*p))
2626 ++p;
2627 while (isSPACE(*p))
2628 ++p;
2629 if (!*p)
2630 break;
2631 if(!gary)
2632 Newx(gary, i + 1, Groups_t);
2633 else
2634 Renew(gary, i + 1, Groups_t);
2635 gary[i] = Atol(p);
2636 }
2637 if (i)
2638 (void)setgroups(i, gary);
f5a63d97 2639 Safefree(gary);
5cd24f17
PP
2640 }
2641#else /* HAS_SETGROUPS */
38ab35f8 2642 PL_egid = SvIV(sv);
5cd24f17 2643#endif /* HAS_SETGROUPS */
3280af22
NIS
2644 if (PL_delaymagic) {
2645 PL_delaymagic |= DM_EGID;
79072805
LW
2646 break; /* don't do magic till later */
2647 }
2648#ifdef HAS_SETEGID
3280af22 2649 (void)setegid((Gid_t)PL_egid);
79072805
LW
2650#else
2651#ifdef HAS_SETREGID
b28d0864 2652 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2653#else
2654#ifdef HAS_SETRESGID
b28d0864 2655 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2656#else
b28d0864
NIS
2657 if (PL_egid == PL_gid) /* special case $) = $( */
2658 (void)PerlProc_setgid(PL_egid);
748a9306 2659 else {
d8eceb89 2660 PL_egid = PerlProc_getegid();
cea2e8a9 2661 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2662 }
79072805
LW
2663#endif
2664#endif
85e6fe83 2665#endif
d8eceb89 2666 PL_egid = PerlProc_getegid();
3280af22 2667 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2668 break;
2669 case ':':
2d8e6c8d 2670 PL_chopset = SvPV_force(sv,len);
79072805 2671 break;
cd39f2b6 2672#ifndef MACOS_TRADITIONAL
79072805 2673 case '0':
e2975953 2674 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2675#ifdef HAS_SETPROCTITLE
2676 /* The BSDs don't show the argv[] in ps(1) output, they
2677 * show a string from the process struct and provide
2678 * the setproctitle() routine to manipulate that. */
a2722ac9 2679 if (PL_origalen != 1) {
b83604b4 2680 s = SvPV_const(sv, len);
98b76f99 2681# if __FreeBSD_version > 410001
9aad2c0e 2682 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2683 * but not the "(perl) suffix from the ps(1)
2684 * output, because that's what ps(1) shows if the
2685 * argv[] is modified. */
6f2ad931 2686 setproctitle("-%s", s);
9aad2c0e 2687# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2688 /* This doesn't really work if you assume that
2689 * $0 = 'foobar'; will wipe out 'perl' from the $0
2690 * because in ps(1) output the result will be like
2691 * sprintf("perl: %s (perl)", s)
2692 * I guess this is a security feature:
2693 * one (a user process) cannot get rid of the original name.
2694 * --jhi */
2695 setproctitle("%s", s);
2696# endif
2697 }
9d3968b2 2698#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2699 if (PL_origalen != 1) {
17aa7f3d 2700 union pstun un;
b83604b4 2701 s = SvPV_const(sv, len);
6867be6d 2702 un.pst_command = (char *)s;
17aa7f3d
JH
2703 pstat(PSTAT_SETCMD, un, len, 0, 0);
2704 }
9d3968b2 2705#else
2d2af554
GA
2706 if (PL_origalen > 1) {
2707 /* PL_origalen is set in perl_parse(). */
2708 s = SvPV_force(sv,len);
2709 if (len >= (STRLEN)PL_origalen-1) {
2710 /* Longer than original, will be truncated. We assume that
2711 * PL_origalen bytes are available. */
2712 Copy(s, PL_origargv[0], PL_origalen-1, char);
2713 }
2714 else {
2715 /* Shorter than original, will be padded. */
235ac35d 2716#ifdef PERL_DARWIN
60777a0d
JH
2717 /* Special case for Mac OS X: see [perl #38868] */
2718 const int pad = 0;
235ac35d 2719#else
8a89a4f1
MB
2720 /* Is the space counterintuitive? Yes.
2721 * (You were expecting \0?)
2722 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2723 * --jhi */
60777a0d 2724 const int pad = ' ';
235ac35d 2725#endif
60777a0d
JH
2726 Copy(s, PL_origargv[0], len, char);
2727 PL_origargv[0][len] = 0;
2728 memset(PL_origargv[0] + len + 1,
2729 pad, PL_origalen - len - 1);
2d2af554
GA
2730 }
2731 PL_origargv[0][PL_origalen-1] = 0;
2732 for (i = 1; i < PL_origargc; i++)
2733 PL_origargv[i] = 0;
79072805 2734 }
9d3968b2 2735#endif
e2975953 2736 UNLOCK_DOLLARZERO_MUTEX;
79072805 2737 break;
cd39f2b6 2738#endif
79072805
LW
2739 }
2740 return 0;
2741}
2742
2743I32
35a4481c 2744Perl_whichsig(pTHX_ const char *sig)
79072805 2745{
aadb217d 2746 register char* const* sigv;
96a5add6 2747 PERL_UNUSED_CONTEXT;
79072805 2748
aadb217d 2749 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2750 if (strEQ(sig,*sigv))
aadb217d 2751 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2752#ifdef SIGCLD
2753 if (strEQ(sig,"CHLD"))
2754 return SIGCLD;
2755#endif
2756#ifdef SIGCHLD
2757 if (strEQ(sig,"CLD"))
2758 return SIGCHLD;
2759#endif
7f1236c0 2760 return -1;
79072805
LW
2761}
2762
ecfc5424 2763Signal_t
1e82f5a6 2764#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
8aad04aa 2765Perl_sighandler(int sig, ...)
1e82f5a6
SH
2766#else
2767Perl_sighandler(int sig)
2768#endif
79072805 2769{
1018e26f
NIS
2770#ifdef PERL_GET_SIG_CONTEXT
2771 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2772#else
cea2e8a9 2773 dTHX;
71d280e3 2774#endif
79072805 2775 dSP;
a0714e2c
SS
2776 GV *gv = NULL;
2777 SV *sv = NULL;
8772537c 2778 SV * const tSv = PL_Sv;
601f1833 2779 CV *cv = NULL;
533c011a 2780 OP *myop = PL_op;
84902520 2781 U32 flags = 0;
8772537c 2782 XPV * const tXpv = PL_Xpv;
71d280e3 2783
3280af22 2784 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2785 flags |= 1;
3280af22 2786 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2787 flags |= 4;
3280af22 2788 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2789 flags |= 16;
2790
727405f8 2791 if (!PL_psig_ptr[sig]) {
99ef548b 2792 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2793 PL_sig_name[sig]);
2794 exit(sig);
2795 }
ff0cee69 2796
84902520
TB
2797 /* Max number of items pushed there is 3*n or 4. We cannot fix
2798 infinity, so we fix 4 (in fact 5): */
2799 if (flags & 1) {
3280af22 2800 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2801 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2802 }
ac27b0f5 2803 if (flags & 4)
3280af22 2804 PL_markstack_ptr++; /* Protect mark. */
84902520 2805 if (flags & 16)
3280af22 2806 PL_scopestack_ix += 1;
84902520 2807 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2808 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2809 || SvTYPE(cv) != SVt_PVCV) {
2810 HV *st;
f2c0649b 2811 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2812 }
84902520 2813
a0d0e21e 2814 if (!cv || !CvROOT(cv)) {
599cee73 2815 if (ckWARN(WARN_SIGNAL))
9014280d 2816 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2817 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2818 : ((cv && CvGV(cv))
2819 ? GvENAME(CvGV(cv))
2820 : "__ANON__")));
2821 goto cleanup;
79072805
LW
2822 }
2823
22c35a8c 2824 if(PL_psig_name[sig]) {
b37c2d43 2825 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2826 flags |= 64;
df3728a2 2827#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2828 PL_sig_sv = sv;
df3728a2 2829#endif
84902520 2830 } else {
ff0cee69 2831 sv = sv_newmortal();
22c35a8c 2832 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2833 }
e336de0d 2834
e788e7d3 2835 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2836 PUSHMARK(SP);
79072805 2837 PUSHs(sv);
8aad04aa
JH
2838#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2839 {
2840 struct sigaction oact;
2841
2842 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2843 siginfo_t *sip;
2844 va_list args;
2845
2846 va_start(args, sig);
2847 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2848 if (sip) {
2849 HV *sih = newHV();
2850 SV *rv = newRV_noinc((SV*)sih);
2851 /* The siginfo fields signo, code, errno, pid, uid,
2852 * addr, status, and band are defined by POSIX/SUSv3. */
2853 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2854 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
79dec0f4 2855#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 2856 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
79dec0f4 2857 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
8aad04aa
JH
2858 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2859 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2860 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
8aad04aa 2861 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
79dec0f4 2862#endif
8aad04aa
JH
2863 EXTEND(SP, 2);
2864 PUSHs((SV*)rv);
10edeb5d 2865 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
8aad04aa 2866 }
b4552a27 2867
31427afe 2868 va_end(args);
8aad04aa
JH
2869 }
2870 }
2871#endif
79072805 2872 PUTBACK;
a0d0e21e 2873
1b266415 2874 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2875
d3acc0f7 2876 POPSTACK;
1b266415 2877 if (SvTRUE(ERRSV)) {
1d615522 2878#ifndef PERL_MICRO
983dbef6 2879#ifdef HAS_SIGPROCMASK
1b266415
NIS
2880 /* Handler "died", for example to get out of a restart-able read().
2881 * Before we re-do that on its behalf re-enable the signal which was
2882 * blocked by the system when we entered.
2883 */
2884 sigset_t set;
2885 sigemptyset(&set);
2886 sigaddset(&set,sig);
2887 sigprocmask(SIG_UNBLOCK, &set, NULL);
2888#else
2889 /* Not clear if this will work */
2890 (void)rsignal(sig, SIG_IGN);
5c1546dc 2891 (void)rsignal(sig, PL_csighandlerp);
1b266415 2892#endif
1d615522 2893#endif /* !PERL_MICRO */
bd61b366 2894 Perl_die(aTHX_ NULL);
1b266415 2895 }
00d579c5 2896cleanup:
84902520 2897 if (flags & 1)
3280af22 2898 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2899 if (flags & 4)
3280af22 2900 PL_markstack_ptr--;
84902520 2901 if (flags & 16)
3280af22 2902 PL_scopestack_ix -= 1;
84902520
TB
2903 if (flags & 64)
2904 SvREFCNT_dec(sv);
533c011a 2905 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2906
3280af22
NIS
2907 PL_Sv = tSv; /* Restore global temporaries. */
2908 PL_Xpv = tXpv;
53bb94e2 2909 return;
79072805 2910}
4e35701f
NIS
2911
2912
51371543 2913static void
8772537c 2914S_restore_magic(pTHX_ const void *p)
51371543 2915{
97aff369 2916 dVAR;
8772537c
AL
2917 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2918 SV* const sv = mgs->mgs_sv;
51371543
GS
2919
2920 if (!sv)
2921 return;
2922
2923 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2924 {
f8c7b90f 2925#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2926 /* While magic was saved (and off) sv_setsv may well have seen
2927 this SV as a prime candidate for COW. */
2928 if (SvIsCOW(sv))
e424a81e 2929 sv_force_normal_flags(sv, 0);
f9701176
NC
2930#endif
2931
51371543
GS
2932 if (mgs->mgs_flags)
2933 SvFLAGS(sv) |= mgs->mgs_flags;
2934 else
2935 mg_magical(sv);
2b77b520
YST
2936 if (SvGMAGICAL(sv)) {
2937 /* downgrade public flags to private,
2938 and discard any other private flags */
2939
10edeb5d
JH
2940 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2941 if (pubflags) {
2942 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2943 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2944 }
2945 }
51371543
GS
2946 }
2947
2948 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2949
2950 /* If we're still on top of the stack, pop us off. (That condition
2951 * will be satisfied if restore_magic was called explicitly, but *not*
2952 * if it's being called via leave_scope.)
2953 * The reason for doing this is that otherwise, things like sv_2cv()
2954 * may leave alloc gunk on the savestack, and some code
2955 * (e.g. sighandler) doesn't expect that...
2956 */
2957 if (PL_savestack_ix == mgs->mgs_ss_ix)
2958 {
2959 I32 popval = SSPOPINT;
c76ac1ee 2960 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2961 PL_savestack_ix -= 2;
2962 popval = SSPOPINT;
2963 assert(popval == SAVEt_ALLOC);
2964 popval = SSPOPINT;
2965 PL_savestack_ix -= popval;
2966 }
2967
2968}
2969
2970static void
8772537c 2971S_unwind_handler_stack(pTHX_ const void *p)
51371543 2972{
27da23d5 2973 dVAR;
e1ec3a88 2974 const U32 flags = *(const U32*)p;
51371543
GS
2975
2976 if (flags & 1)
2977 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2978#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2979 if (flags & 64)
27da23d5 2980 SvREFCNT_dec(PL_sig_sv);
df3728a2 2981#endif
51371543 2982}
1018e26f 2983
66610fdd 2984/*
b3ca2e83
NC
2985=for apidoc magic_sethint
2986
2987Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
2988C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
2989anything that would need a deep copy. Maybe we should warn if we find a
2990reference.
b3ca2e83
NC
2991
2992=cut
2993*/
2994int
2995Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
2996{
2997 dVAR;
2998 assert(mg->mg_len == HEf_SVKEY);
2999
e6e3e454
NC
3000 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3001 an alternative leaf in there, with PL_compiling.cop_hints being used if
3002 it's NULL. If needed for threads, the alternative could lock a mutex,
3003 or take other more complex action. */
3004
5b9c0671
NC
3005 /* Something changed in %^H, so it will need to be restored on scope exit.
3006 Doing this here saves a lot of doing it manually in perl code (and
3007 forgetting to do it, and consequent subtle errors. */
3008 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3009 PL_compiling.cop_hints_hash
3010 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ec2a1de7 3011 (SV *)mg->mg_ptr, sv);
b3ca2e83
NC
3012 return 0;
3013}
3014
3015/*
3016=for apidoc magic_sethint
3017
c28fe1ec
NC
3018Triggered by a delete from %^H, records the key to
3019C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
3020
3021=cut
3022*/
3023int
3024Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3025{
3026 dVAR;
f5a63d97
AL
3027 PERL_UNUSED_ARG(sv);
3028
b3ca2e83
NC
3029 assert(mg->mg_len == HEf_SVKEY);
3030
b3f24c00
MHM
3031 PERL_UNUSED_ARG(sv);
3032
5b9c0671 3033 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
3034 PL_compiling.cop_hints_hash
3035 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3036 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3037 return 0;
3038}
3039
3040/*
66610fdd
RGS
3041 * Local variables:
3042 * c-indentation-style: bsd
3043 * c-basic-offset: 4
3044 * indent-tabs-mode: t
3045 * End:
3046 *
37442d52
RGS
3047 * ex: set ts=8 sts=4 sw=4 noet:
3048 */