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a0d0e21e 1/* mg.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
7272f7c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
12 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent."
79072805
LW
14 */
15
ccfc67b7
JH
16/*
17=head1 Magical Functions
166f8a29
DM
18
19"Magic" is special data attached to SV structures in order to give them
20"magical" properties. When any Perl code tries to read from, or assign to,
21an SV marked as magical, it calls the 'get' or 'set' function associated
22with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 23give it a chance to update its internal value (get on $. writes the line
166f8a29
DM
24number of the last read filehandle into to the SV's IV slot), while
25set is called after an SV has been written to, in order to allow it to make
ddfa107c 26use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM
27PL_rs global variable).
28
29Magic is implemented as a linked list of MAGIC structures attached to the
30SV. Each MAGIC struct holds the type of the magic, a pointer to an array
31of functions that implement the get(), set(), length() etc functions,
32plus space for some flags and pointers. For example, a tied variable has
33a MAGIC structure that contains a pointer to the object associated with the
34tie.
35
ccfc67b7
JH
36*/
37
79072805 38#include "EXTERN.h"
864dbfa3 39#define PERL_IN_MG_C
79072805
LW
40#include "perl.h"
41
5cd24f17 42#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH
43# ifdef I_GRP
44# include <grp.h>
45# endif
188ea221
CS
46#endif
47
757f63d8
SP
48#if defined(HAS_SETGROUPS)
49# ifndef NGROUPS
50# define NGROUPS 32
51# endif
52#endif
53
17aa7f3d
JH
54#ifdef __hpux
55# include <sys/pstat.h>
56#endif
57
8aad04aa 58#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 59Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 60#else
e69880a5 61Signal_t Perl_csighandler(int sig);
8aad04aa 62#endif
e69880a5 63
9cffb111
OS
64#ifdef __Lynx__
65/* Missing protos on LynxOS */
66void setruid(uid_t id);
67void seteuid(uid_t id);
68void setrgid(uid_t id);
69void setegid(uid_t id);
70#endif
71
c07a80fd
PP
72/*
73 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
74 */
75
76struct magic_state {
77 SV* mgs_sv;
78 U32 mgs_flags;
455ece5e 79 I32 mgs_ss_ix;
c07a80fd 80};
455ece5e 81/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS
82
83STATIC void
8fb26106 84S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 85{
97aff369 86 dVAR;
455ece5e 87 MGS* mgs;
c07a80fd 88 assert(SvMAGICAL(sv));
d8b2590f
NC
89 /* Turning READONLY off for a copy-on-write scalar (including shared
90 hash keys) is a bad idea. */
765f542d 91 if (SvIsCOW(sv))
9a265e59 92 sv_force_normal_flags(sv, 0);
c07a80fd 93
8772537c 94 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD
95
96 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd
PP
97 mgs->mgs_sv = sv;
98 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
455ece5e 99 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
c07a80fd
PP
100
101 SvMAGICAL_off(sv);
102 SvREADONLY_off(sv);
085bde85
NC
103 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
104 /* No public flags are set, so promote any private flags to public. */
105 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
106 }
c07a80fd
PP
107}
108
954c1994
GS
109/*
110=for apidoc mg_magical
111
112Turns on the magical status of an SV. See C<sv_magic>.
113
114=cut
115*/
116
8990e307 117void
864dbfa3 118Perl_mg_magical(pTHX_ SV *sv)
8990e307 119{
e1ec3a88 120 const MAGIC* mg;
96a5add6 121 PERL_UNUSED_CONTEXT;
8990e307 122 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 123 const MGVTBL* const vtbl = mg->mg_virtual;
8990e307 124 if (vtbl) {
2b260de0 125 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
8990e307
LW
126 SvGMAGICAL_on(sv);
127 if (vtbl->svt_set)
128 SvSMAGICAL_on(sv);
2b260de0 129 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
8990e307
LW
130 SvRMAGICAL_on(sv);
131 }
132 }
133}
134
2767dea0
DM
135
136/* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
137
138STATIC bool
139S_is_container_magic(const MAGIC *mg)
140{
141 switch (mg->mg_type) {
142 case PERL_MAGIC_bm:
143 case PERL_MAGIC_fm:
144 case PERL_MAGIC_regex_global:
145 case PERL_MAGIC_nkeys:
146#ifdef USE_LOCALE_COLLATE
147 case PERL_MAGIC_collxfrm:
148#endif
149 case PERL_MAGIC_qr:
150 case PERL_MAGIC_taint:
151 case PERL_MAGIC_vec:
152 case PERL_MAGIC_vstring:
153 case PERL_MAGIC_utf8:
154 case PERL_MAGIC_substr:
155 case PERL_MAGIC_defelem:
156 case PERL_MAGIC_arylen:
157 case PERL_MAGIC_pos:
158 case PERL_MAGIC_backref:
159 case PERL_MAGIC_arylen_p:
160 case PERL_MAGIC_rhash:
161 case PERL_MAGIC_symtab:
162 return 0;
163 default:
164 return 1;
165 }
166}
167
954c1994
GS
168/*
169=for apidoc mg_get
170
171Do magic after a value is retrieved from the SV. See C<sv_magic>.
172
173=cut
174*/
175
79072805 176int
864dbfa3 177Perl_mg_get(pTHX_ SV *sv)
79072805 178{
97aff369 179 dVAR;
35a4481c 180 const I32 mgs_ix = SSNEW(sizeof(MGS));
fe2774ed 181 const bool was_temp = (bool)SvTEMP(sv);
0723351e 182 int have_new = 0;
ff76feab 183 MAGIC *newmg, *head, *cur, *mg;
20135930 184 /* guard against sv having being freed midway by holding a private
6683b158
NC
185 reference. */
186
187 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
188 cause the SV's buffer to get stolen (and maybe other stuff).
189 So restore it.
190 */
46da273f 191 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC
192 if (!was_temp) {
193 SvTEMP_off(sv);
194 }
195
455ece5e 196 save_magic(mgs_ix, sv);
463ee0b2 197
ff76feab
AMS
198 /* We must call svt_get(sv, mg) for each valid entry in the linked
199 list of magic. svt_get() may delete the current entry, add new
200 magic to the head of the list, or upgrade the SV. AMS 20010810 */
201
202 newmg = cur = head = mg = SvMAGIC(sv);
203 while (mg) {
35a4481c 204 const MGVTBL * const vtbl = mg->mg_virtual;
ff76feab 205
2b260de0 206 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 207 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 208
58f82c5c
DM
209 /* guard against magic having been deleted - eg FETCH calling
210 * untie */
211 if (!SvMAGIC(sv))
212 break;
b77f7d40 213
ff76feab
AMS
214 /* Don't restore the flags for this entry if it was deleted. */
215 if (mg->mg_flags & MGf_GSKIP)
216 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
a0d0e21e 217 }
ff76feab
AMS
218
219 mg = mg->mg_moremagic;
220
0723351e 221 if (have_new) {
ff76feab
AMS
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
224 if (mg == head) {
0723351e 225 have_new = 0;
ff76feab
AMS
226 mg = cur;
227 head = newmg;
228 }
229 }
230
231 /* Were any new entries added? */
0723351e
NC
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
233 have_new = 1;
ff76feab
AMS
234 cur = mg;
235 mg = newmg;
760ac839 236 }
79072805 237 }
463ee0b2 238
8772537c 239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC
240
241 if (SvREFCNT(sv) == 1) {
242 /* We hold the last reference to this SV, which implies that the
243 SV was deleted as a side effect of the routines we called. */
0c34ef67 244 SvOK_off(sv);
6683b158 245 }
79072805
LW
246 return 0;
247}
248
954c1994
GS
249/*
250=for apidoc mg_set
251
252Do magic after a value is assigned to the SV. See C<sv_magic>.
253
254=cut
255*/
256
79072805 257int
864dbfa3 258Perl_mg_set(pTHX_ SV *sv)
79072805 259{
97aff369 260 dVAR;
35a4481c 261 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 262 MAGIC* mg;
463ee0b2
LW
263 MAGIC* nextmg;
264
455ece5e 265 save_magic(mgs_ix, sv);
463ee0b2
LW
266
267 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 268 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 269 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW
270 if (mg->mg_flags & MGf_GSKIP) {
271 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
455ece5e 272 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
a0d0e21e 273 }
e7cbf6c6
DM
274 if (PL_localizing == 2 && !S_is_container_magic(mg))
275 continue;
2b260de0 276 if (vtbl && vtbl->svt_set)
fc0dc3b3 277 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 278 }
463ee0b2 279
8772537c 280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
281 return 0;
282}
283
954c1994
GS
284/*
285=for apidoc mg_length
286
287Report on the SV's length. See C<sv_magic>.
288
289=cut
290*/
291
79072805 292U32
864dbfa3 293Perl_mg_length(pTHX_ SV *sv)
79072805 294{
97aff369 295 dVAR;
79072805 296 MAGIC* mg;
463ee0b2 297 STRLEN len;
463ee0b2 298
79072805 299 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 300 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 301 if (vtbl && vtbl->svt_len) {
35a4481c 302 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 303 save_magic(mgs_ix, sv);
a0d0e21e 304 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 305 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 306 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW
307 return len;
308 }
309 }
310
35a4481c 311 if (DO_UTF8(sv)) {
10516c54 312 const U8 *s = (U8*)SvPV_const(sv, len);
f5a63d97 313 len = utf8_length(s, s + len);
5636d518
DB
314 }
315 else
10516c54 316 (void)SvPV_const(sv, len);
463ee0b2 317 return len;
79072805
LW
318}
319
8fb26106 320I32
864dbfa3 321Perl_mg_size(pTHX_ SV *sv)
93965878
NIS
322{
323 MAGIC* mg;
ac27b0f5 324
93965878 325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 326 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 327 if (vtbl && vtbl->svt_len) {
35a4481c
AL
328 const I32 mgs_ix = SSNEW(sizeof(MGS));
329 I32 len;
455ece5e 330 save_magic(mgs_ix, sv);
93965878 331 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 332 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 333 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS
334 return len;
335 }
336 }
337
338 switch(SvTYPE(sv)) {
339 case SVt_PVAV:
35a4481c 340 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
93965878
NIS
341 case SVt_PVHV:
342 /* FIXME */
343 default:
cea2e8a9 344 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS
345 break;
346 }
347 return 0;
348}
349
954c1994
GS
350/*
351=for apidoc mg_clear
352
353Clear something magical that the SV represents. See C<sv_magic>.
354
355=cut
356*/
357
79072805 358int
864dbfa3 359Perl_mg_clear(pTHX_ SV *sv)
79072805 360{
35a4481c 361 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 362 MAGIC* mg;
463ee0b2 363
455ece5e 364 save_magic(mgs_ix, sv);
463ee0b2 365
79072805 366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 367 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 368 /* omit GSKIP -- never set here */
727405f8 369
2b260de0 370 if (vtbl && vtbl->svt_clear)
fc0dc3b3 371 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 372 }
463ee0b2 373
8772537c 374 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW
375 return 0;
376}
377
954c1994
GS
378/*
379=for apidoc mg_find
380
381Finds the magic pointer for type matching the SV. See C<sv_magic>.
382
383=cut
384*/
385
93a17b20 386MAGIC*
35a4481c 387Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 388{
96a5add6 389 PERL_UNUSED_CONTEXT;
35a4481c
AL
390 if (sv) {
391 MAGIC *mg;
392 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
393 if (mg->mg_type == type)
394 return mg;
395 }
93a17b20 396 }
5f66b61c 397 return NULL;
93a17b20
LW
398}
399
954c1994
GS
400/*
401=for apidoc mg_copy
402
403Copies the magic from one SV to another. See C<sv_magic>.
404
405=cut
406*/
407
79072805 408int
864dbfa3 409Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 410{
463ee0b2 411 int count = 0;
79072805 412 MAGIC* mg;
463ee0b2 413 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 414 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS
415 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
416 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
417 }
823a54a3
AL
418 else {
419 const char type = mg->mg_type;
1e73acc8 420 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL
421 sv_magic(nsv,
422 (type == PERL_MAGIC_tied)
423 ? SvTIED_obj(sv, mg)
424 : (type == PERL_MAGIC_regdata && mg->mg_obj)
425 ? sv
426 : mg->mg_obj,
427 toLOWER(type), key, klen);
428 count++;
429 }
79072805 430 }
79072805 431 }
463ee0b2 432 return count;
79072805
LW
433}
434
954c1994 435/*
0cbee0a4
DM
436=for apidoc mg_localize
437
438Copy some of the magic from an existing SV to new localized version of
439that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
440doesn't (eg taint, pos).
441
442=cut
443*/
444
445void
446Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
447{
97aff369 448 dVAR;
0cbee0a4
DM
449 MAGIC *mg;
450 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 451 const MGVTBL* const vtbl = mg->mg_virtual;
2767dea0 452 if (!S_is_container_magic(mg))
0cbee0a4 453 continue;
0cbee0a4 454
a5063e7c
DM
455 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
456 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
457 else
0cbee0a4
DM
458 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
459 mg->mg_ptr, mg->mg_len);
a5063e7c 460
0cbee0a4
DM
461 /* container types should remain read-only across localization */
462 SvFLAGS(nsv) |= SvREADONLY(sv);
463 }
464
465 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
466 SvFLAGS(nsv) |= SvMAGICAL(sv);
467 PL_localizing = 1;
468 SvSETMAGIC(nsv);
469 PL_localizing = 0;
470 }
471}
472
473/*
954c1994
GS
474=for apidoc mg_free
475
476Free any magic storage used by the SV. See C<sv_magic>.
477
478=cut
479*/
480
79072805 481int
864dbfa3 482Perl_mg_free(pTHX_ SV *sv)
79072805
LW
483{
484 MAGIC* mg;
485 MAGIC* moremagic;
486 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 487 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 488 moremagic = mg->mg_moremagic;
2b260de0 489 if (vtbl && vtbl->svt_free)
fc0dc3b3 490 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 491 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 492 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 493 Safefree(mg->mg_ptr);
565764a8 494 else if (mg->mg_len == HEf_SVKEY)
88e89b8a 495 SvREFCNT_dec((SV*)mg->mg_ptr);
d460ef45 496 }
b881518d
JH
497 if (mg->mg_flags & MGf_REFCOUNTED)
498 SvREFCNT_dec(mg->mg_obj);
79072805 499 Safefree(mg);
c826f41b 500 SvMAGIC_set(sv, moremagic);
79072805 501 }
b162af07 502 SvMAGIC_set(sv, NULL);
79072805
LW
503 return 0;
504}
505
79072805 506#include <signal.h>
79072805 507
942e002e 508U32
864dbfa3 509Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 510{
97aff369 511 dVAR;
8772537c 512 PERL_UNUSED_ARG(sv);
6cef1e77 513
0bd48802
AL
514 if (PL_curpm) {
515 register const REGEXP * const rx = PM_GETRE(PL_curpm);
516 if (rx) {
a678b0e4
YO
517 if (mg->mg_obj) { /* @+ */
518 /* return the number possible */
07bc277f 519 return RX_NPARENS(rx);
a678b0e4 520 } else { /* @- */
07bc277f 521 I32 paren = RX_LASTPAREN(rx);
a678b0e4
YO
522
523 /* return the last filled */
f46c4081 524 while ( paren >= 0
07bc277f
NC
525 && (RX_OFFS(rx)[paren].start == -1
526 || RX_OFFS(rx)[paren].end == -1) )
f46c4081 527 paren--;
a678b0e4
YO
528 return (U32)paren;
529 }
0bd48802 530 }
8f580fb8 531 }
ac27b0f5 532
942e002e 533 return (U32)-1;
6cef1e77
IZ
534}
535
536int
864dbfa3 537Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 538{
97aff369 539 dVAR;
0bd48802
AL
540 if (PL_curpm) {
541 register const REGEXP * const rx = PM_GETRE(PL_curpm);
542 if (rx) {
543 register const I32 paren = mg->mg_len;
544 register I32 s;
545 register I32 t;
546 if (paren < 0)
547 return 0;
07bc277f
NC
548 if (paren <= (I32)RX_NPARENS(rx) &&
549 (s = RX_OFFS(rx)[paren].start) != -1 &&
550 (t = RX_OFFS(rx)[paren].end) != -1)
0bd48802
AL
551 {
552 register I32 i;
553 if (mg->mg_obj) /* @+ */
554 i = t;
555 else /* @- */
556 i = s;
557
558 if (i > 0 && RX_MATCH_UTF8(rx)) {
07bc277f 559 const char * const b = RX_SUBBEG(rx);
0bd48802 560 if (b)
f5a63d97 561 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 562 }
727405f8 563
0bd48802 564 sv_setiv(sv, i);
1aa99e6b 565 }
0bd48802 566 }
6cef1e77
IZ
567 }
568 return 0;
569}
570
e4b89193 571int
a29d06ed
MG
572Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
573{
d4c19fe8
AL
574 PERL_UNUSED_ARG(sv);
575 PERL_UNUSED_ARG(mg);
a29d06ed 576 Perl_croak(aTHX_ PL_no_modify);
0dbb1585 577 NORETURN_FUNCTION_END;
a29d06ed
MG
578}
579
93a17b20 580U32
864dbfa3 581Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 582{
97aff369 583 dVAR;
93a17b20 584 register I32 paren;
93a17b20 585 register I32 i;
2fdbfb4d
AB
586 register const REGEXP * rx;
587 const char * const remaining = mg->mg_ptr + 1;
93a17b20
LW
588
589 switch (*mg->mg_ptr) {
2fdbfb4d
AB
590 case '\020':
591 if (*remaining == '\0') { /* ^P */
592 break;
593 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
594 goto do_prematch;
595 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
596 goto do_postmatch;
597 }
598 break;
599 case '\015': /* $^MATCH */
600 if (strEQ(remaining, "ATCH")) {
601 goto do_match;
602 } else {
603 break;
604 }
605 case '`':
606 do_prematch:
f1b875a0 607 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
608 goto maybegetparen;
609 case '\'':
610 do_postmatch:
f1b875a0 611 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
612 goto maybegetparen;
613 case '&':
614 do_match:
f1b875a0 615 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d 616 goto maybegetparen;
93a17b20 617 case '1': case '2': case '3': case '4':
2fdbfb4d
AB
618 case '5': case '6': case '7': case '8': case '9':
619 paren = atoi(mg->mg_ptr);
620 maybegetparen:
aaa362c4 621 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
622 getparen:
623 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 624
ffc61ed2 625 if (i < 0)
0844c848 626 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 627 return i;
2fdbfb4d 628 } else {
235bddc8 629 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 630 report_uninit(sv);
2fdbfb4d 631 return 0;
93a17b20 632 }
93a17b20 633 case '+':
aaa362c4 634 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 635 paren = RX_LASTPAREN(rx);
13f57bf8
CS
636 if (paren)
637 goto getparen;
93a17b20 638 }
748a9306 639 return 0;
a01268b5
JH
640 case '\016': /* ^N */
641 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 642 paren = RX_LASTCLOSEPAREN(rx);
a01268b5
JH
643 if (paren)
644 goto getparen;
645 }
646 return 0;
93a17b20
LW
647 }
648 magic_get(sv,mg);
2d8e6c8d 649 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 650 sv_2pv(sv, 0);
2d8e6c8d 651 }
93a17b20
LW
652 if (SvPOK(sv))
653 return SvCUR(sv);
654 return 0;
655}
656
ad3296c6 657#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA
658 if (SvPOK(sv)) { \
659 STRLEN len = SvCUR(sv); \
660 char * const p = SvPVX(sv); \
8e6b4db6
PC
661 while (len > 0 && isSPACE(p[len-1])) \
662 --len; \
663 SvCUR_set(sv, len); \
664 p[len] = '\0'; \
665 } \
ad3296c6
SH
666} STMT_END
667
8b850bd5
NC
668void
669Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
670{
671 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
672 sv_setsv(sv, &PL_sv_undef);
673 else {
674 sv_setpvs(sv, "");
675 SvUTF8_off(sv);
676 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
677 SV *const value = Perl_refcounted_he_fetch(aTHX_
678 c->cop_hints_hash,
679 0, "open<", 5, 0, 0);
680 assert(value);
681 sv_catsv(sv, value);
682 }
683 sv_catpvs(sv, "\0");
684 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
685 SV *const value = Perl_refcounted_he_fetch(aTHX_
686 c->cop_hints_hash,
687 0, "open>", 5, 0, 0);
688 assert(value);
689 sv_catsv(sv, value);
690 }
691 }
692}
693
79072805 694int
864dbfa3 695Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 696{
27da23d5 697 dVAR;
79072805 698 register I32 paren;
35272f84 699 register char *s = NULL;
d9f97599 700 register REGEXP *rx;
823a54a3
AL
701 const char * const remaining = mg->mg_ptr + 1;
702 const char nextchar = *remaining;
79072805
LW
703
704 switch (*mg->mg_ptr) {
748a9306 705 case '\001': /* ^A */
3280af22 706 sv_setsv(sv, PL_bodytarget);
748a9306 707 break;
e5218da5 708 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 709 if (nextchar == '\0') {
e5218da5
GA
710 sv_setiv(sv, (IV)PL_minus_c);
711 }
823a54a3 712 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA
713 sv_setiv(sv, (IV)STATUS_NATIVE);
714 }
49460fe6
NIS
715 break;
716
79072805 717 case '\004': /* ^D */
aea4f609 718 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 719 break;
28f23441 720 case '\005': /* ^E */
823a54a3 721 if (nextchar == '\0') {
4b645107 722#if defined(MACOS_TRADITIONAL)
0a378802
JH
723 {
724 char msg[256];
727405f8 725
0a378802 726 sv_setnv(sv,(double)gMacPerl_OSErr);
727405f8 727 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
0a378802 728 }
4b645107 729#elif defined(VMS)
0a378802
JH
730 {
731# include <descrip.h>
732# include <starlet.h>
733 char msg[255];
734 $DESCRIPTOR(msgdsc,msg);
735 sv_setnv(sv,(NV) vaxc$errno);
736 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
737 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
738 else
c69006e4 739 sv_setpvn(sv,"",0);
0a378802 740 }
4b645107 741#elif defined(OS2)
0a378802
JH
742 if (!(_emx_env & 0x200)) { /* Under DOS */
743 sv_setnv(sv, (NV)errno);
744 sv_setpv(sv, errno ? Strerror(errno) : "");
745 } else {
746 if (errno != errno_isOS2) {
823a54a3 747 const int tmp = _syserrno();
0a378802
JH
748 if (tmp) /* 2nd call to _syserrno() makes it 0 */
749 Perl_rc = tmp;
750 }
751 sv_setnv(sv, (NV)Perl_rc);
752 sv_setpv(sv, os2error(Perl_rc));
753 }
4b645107 754#elif defined(WIN32)
0a378802 755 {
d4c19fe8 756 const DWORD dwErr = GetLastError();
0a378802 757 sv_setnv(sv, (NV)dwErr);
823a54a3 758 if (dwErr) {
0a378802
JH
759 PerlProc_GetOSError(sv, dwErr);
760 }
761 else
c69006e4 762 sv_setpvn(sv, "", 0);
0a378802
JH
763 SetLastError(dwErr);
764 }
22fae026 765#else
f6c8f21d 766 {
8772537c 767 const int saveerrno = errno;
f6c8f21d 768 sv_setnv(sv, (NV)errno);
666ea192 769 sv_setpv(sv, errno ? Strerror(errno) : "");
f6c8f21d
RGS
770 errno = saveerrno;
771 }
28f23441 772#endif
ad3296c6 773 SvRTRIM(sv);
0a378802
JH
774 SvNOK_on(sv); /* what a wonderful hack! */
775 }
823a54a3 776 else if (strEQ(remaining, "NCODING"))
0a378802
JH
777 sv_setsv(sv, PL_encoding);
778 break;
79072805 779 case '\006': /* ^F */
3280af22 780 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 781 break;
a0d0e21e 782 case '\010': /* ^H */
3280af22 783 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 784 break;
9d116dd7 785 case '\011': /* ^I */ /* NOT \t in EBCDIC */
120f7abe 786 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
79072805 787 break;
ac27b0f5 788 case '\017': /* ^O & ^OPEN */
823a54a3 789 if (nextchar == '\0') {
ac27b0f5 790 sv_setpv(sv, PL_osname);
3511154c
DM
791 SvTAINTED_off(sv);
792 }
823a54a3 793 else if (strEQ(remaining, "PEN")) {
8b850bd5 794 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 795 }
28f23441 796 break;
cde0cee5
YO
797 case '\020':
798 if (nextchar == '\0') { /* ^P */
799 sv_setiv(sv, (IV)PL_perldb);
800 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
801 goto do_prematch_fetch;
802 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
803 goto do_postmatch_fetch;
804 }
79072805 805 break;
fb73857a 806 case '\023': /* ^S */
823a54a3 807 if (nextchar == '\0') {
bc177e6b 808 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 809 SvOK_off(sv);
3280af22 810 else if (PL_in_eval)
6dc8a9e4 811 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS
812 else
813 sv_setiv(sv, 0);
d58bf5aa 814 }
fb73857a 815 break;
79072805 816 case '\024': /* ^T */
823a54a3 817 if (nextchar == '\0') {
88e89b8a 818#ifdef BIG_TIME
7c36658b 819 sv_setnv(sv, PL_basetime);
88e89b8a 820#else
7c36658b 821 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 822#endif
7c36658b 823 }
823a54a3 824 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS
825 sv_setiv(sv, PL_tainting
826 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
827 : 0);
7c36658b 828 break;
e07ea26a 829 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 830 if (strEQ(remaining, "NICODE"))
a05d7ebb 831 sv_setuv(sv, (UV) PL_unicode);
823a54a3 832 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 833 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC
834 else if (strEQ(remaining, "TF8CACHE"))
835 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH
836 break;
837 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 838 if (nextchar == '\0')
4438c4b7 839 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 840 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 841 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 842 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS
843 }
844 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH
845 sv_setpvn(
846 sv,
847 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
848 WARNsize
849 );
013b78e8 850 }
d3a7d8c7 851 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS
852 /* Get the bit mask for $warnings::Bits{all}, because
853 * it could have been extended by warnings::register */
823a54a3 854 HV * const bits=get_hv("warnings::Bits", FALSE);
f5a63d97
AL
855 if (bits) {
856 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
857 if (bits_all)
858 sv_setsv(sv, *bits_all);
75b6c4ca
RGS
859 }
860 else {
861 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
862 }
ac27b0f5 863 }
4438c4b7 864 else {
72dc9ed5
NC
865 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
866 *PL_compiling.cop_warnings);
ac27b0f5 867 }
d3a7d8c7 868 SvPOK_only(sv);
4438c4b7 869 }
79072805 870 break;
cde0cee5
YO
871 case '\015': /* $^MATCH */
872 if (strEQ(remaining, "ATCH")) {
79072805
LW
873 case '1': case '2': case '3': case '4':
874 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO
875 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
876 /*
877 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
878 * XXX Does the new way break anything?
879 */
880 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 881 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO
882 break;
883 }
884 sv_setsv(sv,&PL_sv_undef);
79072805
LW
885 }
886 break;
887 case '+':
aaa362c4 888 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC
889 if (RX_LASTPAREN(rx)) {
890 CALLREG_NUMBUF_FETCH(rx,RX_LASTPAREN(rx),sv);
44a2ac75
YO
891 break;
892 }
79072805 893 }
3280af22 894 sv_setsv(sv,&PL_sv_undef);
79072805 895 break;
a01268b5
JH
896 case '\016': /* ^N */
897 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC
898 if (RX_LASTCLOSEPAREN(rx)) {
899 CALLREG_NUMBUF_FETCH(rx,RX_LASTCLOSEPAREN(rx),sv);
44a2ac75
YO
900 break;
901 }
902
a01268b5
JH
903 }
904 sv_setsv(sv,&PL_sv_undef);
905 break;
79072805 906 case '`':
cde0cee5 907 do_prematch_fetch:
aaa362c4 908 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 909 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 910 break;
79072805 911 }
3280af22 912 sv_setsv(sv,&PL_sv_undef);
79072805
LW
913 break;
914 case '\'':
cde0cee5 915 do_postmatch_fetch:
aaa362c4 916 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 917 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 918 break;
79072805 919 }
3280af22 920 sv_setsv(sv,&PL_sv_undef);
79072805
LW
921 break;
922 case '.':
3280af22 923 if (GvIO(PL_last_in_gv)) {
357c8808 924 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 925 }
79072805
LW
926 break;
927 case '?':
809a5acc 928 {
809a5acc 929 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 930#ifdef COMPLEX_STATUS
6b88bc9c
GS
931 LvTARGOFF(sv) = PL_statusvalue;
932 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 933#endif
809a5acc 934 }
79072805
LW
935 break;
936 case '^':
0daa599b
RGS
937 if (GvIOp(PL_defoutgv))
938 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW
939 if (s)
940 sv_setpv(sv,s);
941 else {
3280af22 942 sv_setpv(sv,GvENAME(PL_defoutgv));
cb421d5e 943 sv_catpvs(sv,"_TOP");
79072805
LW
944 }
945 break;
946 case '~':
0daa599b
RGS
947 if (GvIOp(PL_defoutgv))
948 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 949 if (!s)
3280af22 950 s = GvENAME(PL_defoutgv);
79072805
LW
951 sv_setpv(sv,s);
952 break;
79072805 953 case '=':
0daa599b
RGS
954 if (GvIOp(PL_defoutgv))
955 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW
956 break;
957 case '-':
0daa599b
RGS
958 if (GvIOp(PL_defoutgv))
959 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW
960 break;
961 case '%':
0daa599b
RGS
962 if (GvIOp(PL_defoutgv))
963 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 964 break;
79072805
LW
965 case ':':
966 break;
967 case '/':
968 break;
969 case '[':
11206fdd 970 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW
971 break;
972 case '|':
0daa599b
RGS
973 if (GvIOp(PL_defoutgv))
974 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805
LW
975 break;
976 case ',':
79072805
LW
977 break;
978 case '\\':
b2ce0fda 979 if (PL_ors_sv)
f28098ff 980 sv_copypv(sv, PL_ors_sv);
79072805 981 break;
79072805 982 case '!':
a5f75d66 983#ifdef VMS
65202027 984 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
88e89b8a 985 sv_setpv(sv, errno ? Strerror(errno) : "");
a5f75d66 986#else
88e89b8a 987 {
8772537c 988 const int saveerrno = errno;
65202027 989 sv_setnv(sv, (NV)errno);
88e89b8a 990#ifdef OS2
ed344e4f
IZ
991 if (errno == errno_isOS2 || errno == errno_isOS2_set)
992 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 993 else
a5f75d66 994#endif
666ea192 995 sv_setpv(sv, errno ? Strerror(errno) : "");
88e89b8a
PP
996 errno = saveerrno;
997 }
998#endif
ad3296c6 999 SvRTRIM(sv);
946ec16e 1000 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW
1001 break;
1002 case '<':
3280af22 1003 sv_setiv(sv, (IV)PL_uid);
79072805
LW
1004 break;
1005 case '>':
3280af22 1006 sv_setiv(sv, (IV)PL_euid);
79072805
LW
1007 break;
1008 case '(':
3280af22 1009 sv_setiv(sv, (IV)PL_gid);
79072805
LW
1010 goto add_groups;
1011 case ')':
3280af22 1012 sv_setiv(sv, (IV)PL_egid);
79072805 1013 add_groups:
79072805 1014#ifdef HAS_GETGROUPS
79072805 1015 {
57d7c65e 1016 Groups_t *gary = NULL;
fb45abb2 1017 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC
1018 Newx(gary, num_groups, Groups_t);
1019 num_groups = getgroups(num_groups, gary);
fb45abb2
GA
1020 for (i = 0; i < num_groups; i++)
1021 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1022 Safefree(gary);
79072805 1023 }
155aba94 1024 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1025#endif
79072805 1026 break;
cd39f2b6 1027#ifndef MACOS_TRADITIONAL
79072805
LW
1028 case '0':
1029 break;
cd39f2b6 1030#endif
79072805 1031 }
a0d0e21e 1032 return 0;
79072805
LW
1033}
1034
1035int
864dbfa3 1036Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1037{
8772537c 1038 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
1039
1040 if (uf && uf->uf_val)
24f81a43 1041 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW
1042 return 0;
1043}
1044
1045int
864dbfa3 1046Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1047{
27da23d5 1048 dVAR;
9ae3433d 1049 STRLEN len = 0, klen;
666ea192 1050 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1051 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1052 my_setenv(ptr, s);
1e422769 1053
a0d0e21e
LW
1054#ifdef DYNAMIC_ENV_FETCH
1055 /* We just undefd an environment var. Is a replacement */
1056 /* waiting in the wings? */
1057 if (!len) {
fabdb6c0
AL
1058 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1059 if (valp)
4ab59fcc 1060 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW
1061 }
1062#endif
1e422769 1063
39e571d4 1064#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW
1065 /* And you'll never guess what the dog had */
1066 /* in its mouth... */
3280af22 1067 if (PL_tainting) {
1e422769
PP
1068 MgTAINTEDDIR_off(mg);
1069#ifdef VMS
5aabfad6 1070 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1071 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1072 Stat_t sbuf;
1e422769
PP
1073 int i = 0, j = 0;
1074
6fca0082 1075 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1076 elt = eltbuf;
1e422769
PP
1077 do { /* DCL$PATH may be a search list */
1078 while (1) { /* as may dev portion of any element */
1079 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1080 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1081 cando_by_name(S_IWUSR,0,elt) ) {
1082 MgTAINTEDDIR_on(mg);
1083 return 0;
1084 }
1085 }
bd61b366 1086 if ((cp = strchr(elt, ':')) != NULL)
1e422769
PP
1087 *cp = '\0';
1088 if (my_trnlnm(elt, eltbuf, j++))
1089 elt = eltbuf;
1090 else
1091 break;
1092 }
1093 j = 0;
1094 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1095 }
1096#endif /* VMS */
5aabfad6 1097 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1098 const char * const strend = s + len;
463ee0b2
LW
1099
1100 while (s < strend) {
96827780 1101 char tmpbuf[256];
c623ac67 1102 Stat_t st;
5f74f29c 1103 I32 i;
f5a63d97
AL
1104#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1105 const char path_sep = '|';
1106#else
1107 const char path_sep = ':';
1108#endif
96827780 1109 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1110 s, strend, path_sep, &i);
463ee0b2 1111 s++;
bb7a0f54 1112 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB
1113#ifdef VMS
1114 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1115#else
1116 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1117#endif
c6ed36e1 1118 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1119 MgTAINTEDDIR_on(mg);
1e422769
PP
1120 return 0;
1121 }
463ee0b2 1122 }
79072805
LW
1123 }
1124 }
39e571d4 1125#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1126
79072805
LW
1127 return 0;
1128}
1129
1130int
864dbfa3 1131Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1132{
8772537c 1133 PERL_UNUSED_ARG(sv);
bd61b366 1134 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW
1135 return 0;
1136}
1137
88e89b8a 1138int
864dbfa3 1139Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1140{
97aff369 1141 dVAR;
65e66c80 1142 PERL_UNUSED_ARG(mg);
b0269e46 1143#if defined(VMS)
cea2e8a9 1144 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1145#else
3280af22 1146 if (PL_localizing) {
fb73857a 1147 HE* entry;
b0269e46 1148 my_clearenv();
fb73857a 1149 hv_iterinit((HV*)sv);
155aba94 1150 while ((entry = hv_iternext((HV*)sv))) {
fb73857a
PP
1151 I32 keylen;
1152 my_setenv(hv_iterkey(entry, &keylen),
b83604b4 1153 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
fb73857a
PP
1154 }
1155 }
1156#endif
1157 return 0;
1158}
1159
1160int
864dbfa3 1161Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1162{
27da23d5 1163 dVAR;
8772537c
AL
1164 PERL_UNUSED_ARG(sv);
1165 PERL_UNUSED_ARG(mg);
b0269e46
AB
1166#if defined(VMS)
1167 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1168#else
1169 my_clearenv();
1170#endif
3e3baf6d 1171 return 0;
66b1d557
HM
1172}
1173
64ca3a65 1174#ifndef PERL_MICRO
2d4fcd5e
AJ
1175#ifdef HAS_SIGPROCMASK
1176static void
1177restore_sigmask(pTHX_ SV *save_sv)
1178{
0bd48802 1179 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1180 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ
1181}
1182#endif
66b1d557 1183int
864dbfa3 1184Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1185{
97aff369 1186 dVAR;
88e89b8a 1187 /* Are we fetching a signal entry? */
8772537c 1188 const I32 i = whichsig(MgPV_nolen_const(mg));
e02bfb16 1189 if (i > 0) {
22c35a8c
GS
1190 if(PL_psig_ptr[i])
1191 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1192 else {
46da273f 1193 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1194#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL
1195 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1196 sigstate = SIG_IGN;
2e34cc90
CL
1197#endif
1198#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL
1199 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1200 sigstate = SIG_DFL;
85b332e2 1201#endif
88e89b8a 1202 /* cache state so we don't fetch it again */
8aad04aa 1203 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1204 sv_setpvs(sv,"IGNORE");
88e89b8a 1205 else
3280af22 1206 sv_setsv(sv,&PL_sv_undef);
46da273f 1207 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a
PP
1208 SvTEMP_off(sv);
1209 }
1210 }
1211 return 0;
1212}
1213int
864dbfa3 1214Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1215{
2d4fcd5e
AJ
1216 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1217 * refactoring might be in order.
1218 */
27da23d5 1219 dVAR;
8772537c
AL
1220 register const char * const s = MgPV_nolen_const(mg);
1221 PERL_UNUSED_ARG(sv);
2d4fcd5e 1222 if (*s == '_') {
cbbf8932 1223 SV** svp = NULL;
2d4fcd5e
AJ
1224 if (strEQ(s,"__DIE__"))
1225 svp = &PL_diehook;
b274dc4e 1226 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
2d4fcd5e 1227 svp = &PL_warnhook;
27da23d5 1228 if (svp && *svp) {
b274dc4e 1229 SV *const to_dec = *svp;
cbbf8932 1230 *svp = NULL;
b274dc4e 1231 SvREFCNT_dec(to_dec);
2d4fcd5e
AJ
1232 }
1233 }
1234 else {
2d4fcd5e 1235 /* Are we clearing a signal entry? */
8772537c 1236 const I32 i = whichsig(s);
e02bfb16 1237 if (i > 0) {
2d4fcd5e
AJ
1238#ifdef HAS_SIGPROCMASK
1239 sigset_t set, save;
1240 SV* save_sv;
1241 /* Avoid having the signal arrive at a bad time, if possible. */
1242 sigemptyset(&set);
1243 sigaddset(&set,i);
1244 sigprocmask(SIG_BLOCK, &set, &save);
1245 ENTER;
9ff8e806 1246 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ
1247 SAVEFREESV(save_sv);
1248 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1249#endif
1250 PERL_ASYNC_CHECK();
1251#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1252 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2d4fcd5e
AJ
1253#endif
1254#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1255 PL_sig_defaulting[i] = 1;
5c1546dc 1256 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1257#else
8aad04aa 1258 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2d4fcd5e
AJ
1259#endif
1260 if(PL_psig_name[i]) {
1261 SvREFCNT_dec(PL_psig_name[i]);
1262 PL_psig_name[i]=0;
1263 }
1264 if(PL_psig_ptr[i]) {
6136c704 1265 SV * const to_dec=PL_psig_ptr[i];
2d4fcd5e
AJ
1266 PL_psig_ptr[i]=0;
1267 LEAVE;
1268 SvREFCNT_dec(to_dec);
1269 }
1270 else
1271 LEAVE;
1272 }
88e89b8a
PP
1273 }
1274 return 0;
1275}
3d37d572 1276
acd15b85
CB
1277/*
1278 * The signal handling nomenclature has gotten a bit confusing since the advent of
1279 * safe signals. S_raise_signal only raises signals by analogy with what the
1280 * underlying system's signal mechanism does. It might be more proper to say that
1281 * it defers signals that have already been raised and caught.
1282 *
1283 * PL_sig_pending and PL_psig_pend likewise do not track signals that are pending
1284 * in the sense of being on the system's signal queue in between raising and delivery.
1285 * They are only pending on Perl's deferral list, i.e., they track deferred signals
1286 * awaiting delivery after the current Perl opcode completes and say nothing about
1287 * signals raised but not yet caught in the underlying signal implementation.
1288 */
1289
2563cec5
IZ
1290#ifndef SIG_PENDING_DIE_COUNT
1291# define SIG_PENDING_DIE_COUNT 120
1292#endif
1293
dd374669
AL
1294static void
1295S_raise_signal(pTHX_ int sig)
0a8e0eff 1296{
97aff369 1297 dVAR;
0a8e0eff
NIS
1298 /* Set a flag to say this signal is pending */
1299 PL_psig_pend[sig]++;
1300 /* And one to say _a_ signal is pending */
2563cec5
IZ
1301 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1302 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1303 (unsigned long)SIG_PENDING_DIE_COUNT);
0a8e0eff
NIS
1304}
1305
1306Signal_t
8aad04aa 1307#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1308Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 1309#else
0a8e0eff 1310Perl_csighandler(int sig)
8aad04aa 1311#endif
0a8e0eff 1312{
1018e26f
NIS
1313#ifdef PERL_GET_SIG_CONTEXT
1314 dTHXa(PERL_GET_SIG_CONTEXT);
1315#else
85b332e2
CL
1316 dTHX;
1317#endif
fe5bfecd 1318#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
fe5bfecd 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
fe5bfecd 1332#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
fe5bfecd 1333#endif
853d2c32
RGS
1334 if (
1335#ifdef SIGILL
1336 sig == SIGILL ||
1337#endif
1338#ifdef SIGBUS
1339 sig == SIGBUS ||
1340#endif
1341#ifdef SIGSEGV
1342 sig == SIGSEGV ||
1343#endif
1344 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3
JH
1345 /* Call the perl level handler now--
1346 * with risk we may be in malloc() etc. */
6e324d09 1347#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1348 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1349#else
1350 (*PL_sighandlerp)(sig);
92807b6d 1351#endif
4ffa73a3 1352 else
dd374669 1353 S_raise_signal(aTHX_ sig);
0a8e0eff
NIS
1354}
1355
2e34cc90
CL
1356#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1357void
1358Perl_csighandler_init(void)
1359{
1360 int sig;
27da23d5 1361 if (PL_sig_handlers_initted) return;
2e34cc90
CL
1362
1363 for (sig = 1; sig < SIG_SIZE; sig++) {
1364#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1365 dTHX;
27da23d5 1366 PL_sig_defaulting[sig] = 1;
5c1546dc 1367 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL
1368#endif
1369#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1370 PL_sig_ignoring[sig] = 0;
2e34cc90
CL
1371#endif
1372 }
27da23d5 1373 PL_sig_handlers_initted = 1;
2e34cc90
CL
1374}
1375#endif
1376
0a8e0eff
NIS
1377void
1378Perl_despatch_signals(pTHX)
1379{
97aff369 1380 dVAR;
0a8e0eff
NIS
1381 int sig;
1382 PL_sig_pending = 0;
1383 for (sig = 1; sig < SIG_SIZE; sig++) {
1384 if (PL_psig_pend[sig]) {
25da4428
JH
1385 PERL_BLOCKSIG_ADD(set, sig);
1386 PL_psig_pend[sig] = 0;
1387 PERL_BLOCKSIG_BLOCK(set);
6e324d09 1388#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1389 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB
1390#else
1391 (*PL_sighandlerp)(sig);
92807b6d 1392#endif
25da4428 1393 PERL_BLOCKSIG_UNBLOCK(set);
0a8e0eff
NIS
1394 }
1395 }
1396}
1397
85e6fe83 1398int
864dbfa3 1399Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1400{
27da23d5 1401 dVAR;
79072805 1402 I32 i;
cbbf8932 1403 SV** svp = NULL;
2d4fcd5e
AJ
1404 /* Need to be careful with SvREFCNT_dec(), because that can have side
1405 * effects (due to closures). We must make sure that the new disposition
1406 * is in place before it is called.
1407 */
cbbf8932 1408 SV* to_dec = NULL;
e72dc28c 1409 STRLEN len;
2d4fcd5e
AJ
1410#ifdef HAS_SIGPROCMASK
1411 sigset_t set, save;
1412 SV* save_sv;
1413#endif
a0d0e21e 1414
d5263905 1415 register const char *s = MgPV_const(mg,len);
748a9306
LW
1416 if (*s == '_') {
1417 if (strEQ(s,"__DIE__"))
3280af22 1418 svp = &PL_diehook;
748a9306 1419 else if (strEQ(s,"__WARN__"))
3280af22 1420 svp = &PL_warnhook;
748a9306 1421 else
cea2e8a9 1422 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1423 i = 0;
4633a7c4 1424 if (*svp) {
9289f461
RGS
1425 if (*svp != PERL_WARNHOOK_FATAL)
1426 to_dec = *svp;
cbbf8932 1427 *svp = NULL;
4633a7c4 1428 }
748a9306
LW
1429 }
1430 else {
1431 i = whichsig(s); /* ...no, a brick */
86d86cad 1432 if (i <= 0) {
e476b1b5 1433 if (ckWARN(WARN_SIGNAL))
9014280d 1434 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW
1435 return 0;
1436 }
2d4fcd5e
AJ
1437#ifdef HAS_SIGPROCMASK
1438 /* Avoid having the signal arrive at a bad time, if possible. */
1439 sigemptyset(&set);
1440 sigaddset(&set,i);
1441 sigprocmask(SIG_BLOCK, &set, &save);
1442 ENTER;
9ff8e806 1443 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ
1444 SAVEFREESV(save_sv);
1445 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1446#endif
1447 PERL_ASYNC_CHECK();
2e34cc90 1448#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1449 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1450#endif
23ada85b 1451#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1452 PL_sig_ignoring[i] = 0;
85b332e2 1453#endif
2e34cc90 1454#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1455 PL_sig_defaulting[i] = 0;
2e34cc90 1456#endif
22c35a8c 1457 SvREFCNT_dec(PL_psig_name[i]);
2d4fcd5e 1458 to_dec = PL_psig_ptr[i];
46da273f 1459 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1460 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
e72dc28c 1461 PL_psig_name[i] = newSVpvn(s, len);
22c35a8c 1462 SvREADONLY_on(PL_psig_name[i]);
748a9306 1463 }
a0d0e21e 1464 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
2d4fcd5e 1465 if (i) {
5c1546dc 1466 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e
AJ
1467#ifdef HAS_SIGPROCMASK
1468 LEAVE;
1469#endif
1470 }
748a9306 1471 else
b37c2d43 1472 *svp = SvREFCNT_inc_simple_NN(sv);
2d4fcd5e
AJ
1473 if(to_dec)
1474 SvREFCNT_dec(to_dec);
a0d0e21e
LW
1475 return 0;
1476 }
baf38871 1477 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
748a9306 1478 if (strEQ(s,"IGNORE")) {
85b332e2 1479 if (i) {
23ada85b 1480#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1481 PL_sig_ignoring[i] = 1;
5c1546dc 1482 (void)rsignal(i, PL_csighandlerp);
85b332e2 1483#else
8aad04aa 1484 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1485#endif
2d4fcd5e 1486 }
748a9306
LW
1487 }
1488 else if (strEQ(s,"DEFAULT") || !*s) {
1489 if (i)
2e34cc90
CL
1490#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1491 {
27da23d5 1492 PL_sig_defaulting[i] = 1;
5c1546dc 1493 (void)rsignal(i, PL_csighandlerp);
2e34cc90
CL
1494 }
1495#else
8aad04aa 1496 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1497#endif
748a9306 1498 }
79072805 1499 else {
5aabfad6
PP
1500 /*
1501 * We should warn if HINT_STRICT_REFS, but without
1502 * access to a known hint bit in a known OP, we can't
1503 * tell whether HINT_STRICT_REFS is in force or not.
1504 */
46fc3d4c 1505 if (!strchr(s,':') && !strchr(s,'\''))
89529cee 1506 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
748a9306 1507 if (i)
5c1546dc 1508 (void)rsignal(i, PL_csighandlerp);
748a9306 1509 else
46da273f 1510 *svp = SvREFCNT_inc_simple_NN(sv);
79072805 1511 }
2d4fcd5e
AJ
1512#ifdef HAS_SIGPROCMASK
1513 if(i)
1514 LEAVE;
1515#endif
1516 if(to_dec)
1517 SvREFCNT_dec(to_dec);
79072805
LW
1518 return 0;
1519}
64ca3a65 1520#endif /* !PERL_MICRO */
79072805
LW
1521
1522int
864dbfa3 1523Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1524{
97aff369 1525 dVAR;
08aeb9f7 1526 HV* stash;
8772537c 1527 PERL_UNUSED_ARG(sv);
e1a479c5 1528
08aeb9f7
BB
1529 /* Bail out if destruction is going on */
1530 if(PL_dirty) return 0;
1531
89c14e2e
BB
1532 /* Skip _isaelem because _isa will handle it shortly */
1533 if (PL_delaymagic & DM_ARRAY && mg->mg_type == PERL_MAGIC_isaelem)
1534 return 0;
1535
70cd14a1
CB
1536 /* XXX Once it's possible, we need to
1537 detect that our @ISA is aliased in
1538 other stashes, and act on the stashes
1539 of all of the aliases */
1540
e1a479c5
BB
1541 /* The first case occurs via setisa,
1542 the second via setisa_elem, which
1543 calls this same magic */
08aeb9f7
BB
1544 stash = GvSTASH(
1545 SvTYPE(mg->mg_obj) == SVt_PVGV
1546 ? (GV*)mg->mg_obj
1547 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
e1a479c5
BB
1548 );
1549
89c14e2e 1550 mro_isa_changed_in(stash);
08aeb9f7 1551
463ee0b2
LW
1552 return 0;
1553}
1554
1555int
864dbfa3 1556Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1557{
97aff369 1558 dVAR;
8772537c
AL
1559 PERL_UNUSED_ARG(sv);
1560 PERL_UNUSED_ARG(mg);
3280af22 1561 PL_amagic_generation++;
463ee0b2 1562
a0d0e21e
LW
1563 return 0;
1564}
463ee0b2 1565
946ec16e 1566int
864dbfa3 1567Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1568{
dd374669 1569 HV * const hv = (HV*)LvTARG(sv);
6ff81951 1570 I32 i = 0;
8772537c 1571 PERL_UNUSED_ARG(mg);
7719e241 1572
6ff81951 1573 if (hv) {
497b47a8
JH
1574 (void) hv_iterinit(hv);
1575 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1576 i = HvKEYS(hv);
1577 else {
1578 while (hv_iternext(hv))
1579 i++;
1580 }
6ff81951
GS
1581 }
1582
1583 sv_setiv(sv, (IV)i);
1584 return 0;
1585}
1586
1587int
864dbfa3 1588Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1589{
8772537c 1590 PERL_UNUSED_ARG(mg);
946ec16e
PP
1591 if (LvTARG(sv)) {
1592 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
946ec16e
PP
1593 }
1594 return 0;
ac27b0f5 1595}
946ec16e 1596
e336de0d 1597/* caller is responsible for stack switching/cleanup */
565764a8 1598STATIC int
e1ec3a88 1599S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
a0d0e21e 1600{
97aff369 1601 dVAR;
a0d0e21e 1602 dSP;
463ee0b2 1603
924508f0
GS
1604 PUSHMARK(SP);
1605 EXTEND(SP, n);
33c27489 1606 PUSHs(SvTIED_obj(sv, mg));
ac27b0f5 1607 if (n > 1) {
93965878 1608 if (mg->mg_ptr) {
565764a8 1609 if (mg->mg_len >= 0)
79cb57f6 1610 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
565764a8 1611 else if (mg->mg_len == HEf_SVKEY)
93965878
NIS
1612 PUSHs((SV*)mg->mg_ptr);
1613 }
14befaf4 1614 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
565764a8 1615 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
93965878
NIS
1616 }
1617 }
1618 if (n > 2) {
1619 PUSHs(val);
88e89b8a 1620 }
463ee0b2
LW
1621 PUTBACK;
1622
864dbfa3 1623 return call_method(meth, flags);
946ec16e
PP
1624}
1625
76e3520e 1626STATIC int
e1ec3a88 1627S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1628{
27da23d5 1629 dVAR; dSP;
463ee0b2 1630
a0d0e21e
LW
1631 ENTER;
1632 SAVETMPS;
e788e7d3 1633 PUSHSTACKi(PERLSI_MAGIC);
463ee0b2 1634
33c27489 1635 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
3280af22 1636 sv_setsv(sv, *PL_stack_sp--);
93965878 1637 }
463ee0b2 1638
d3acc0f7 1639 POPSTACK;
a0d0e21e
LW
1640 FREETMPS;
1641 LEAVE;
1642 return 0;
1643}
463ee0b2 1644
a0d0e21e 1645int
864dbfa3 1646Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1647{
a0d0e21e
LW
1648 if (mg->mg_ptr)
1649 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1650 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW
1651 return 0;
1652}
1653
1654int
864dbfa3 1655Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1656{
27da23d5 1657 dVAR; dSP;
a60c0954 1658 ENTER;
e788e7d3 1659 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1660 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
d3acc0f7 1661 POPSTACK;
a60c0954 1662 LEAVE;
463ee0b2
LW
1663 return 0;
1664}
1665
1666int
864dbfa3 1667Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1668{
a0d0e21e
LW
1669 return magic_methpack(sv,mg,"DELETE");
1670}
463ee0b2 1671
93965878
NIS
1672
1673U32
864dbfa3 1674Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1675{
27da23d5 1676 dVAR; dSP;
22846ab4 1677 I32 retval = 0;
93965878
NIS
1678
1679 ENTER;
1680 SAVETMPS;
e788e7d3 1681 PUSHSTACKi(PERLSI_MAGIC);
33c27489 1682 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
3280af22 1683 sv = *PL_stack_sp--;
22846ab4
AB
1684 retval = SvIV(sv)-1;
1685 if (retval < -1)
1686 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1687 }
d3acc0f7 1688 POPSTACK;
93965878
NIS
1689 FREETMPS;
1690 LEAVE;
22846ab4 1691 return (U32) retval;
93965878
NIS
1692}
1693
cea2e8a9
GS
1694int
1695Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1696{
27da23d5 1697 dVAR; dSP;
463ee0b2 1698
e336de0d 1699 ENTER;
e788e7d3 1700 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1701 PUSHMARK(SP);
33c27489 1702 XPUSHs(SvTIED_obj(sv, mg));
463ee0b2 1703 PUTBACK;
864dbfa3 1704 call_method("CLEAR", G_SCALAR|G_DISCARD);
d3acc0f7 1705 POPSTACK;
a60c0954 1706 LEAVE;
a3bcc51e 1707
463ee0b2
LW
1708 return 0;
1709}
1710
1711int
864dbfa3 1712Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1713{
27da23d5 1714 dVAR; dSP;
666ea192 1715 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
463ee0b2
LW
1716
1717 ENTER;
a0d0e21e 1718 SAVETMPS;
e788e7d3 1719 PUSHSTACKi(PERLSI_MAGIC);
924508f0
GS
1720 PUSHMARK(SP);
1721 EXTEND(SP, 2);
33c27489 1722 PUSHs(SvTIED_obj(sv, mg));
463ee0b2
LW
1723 if (SvOK(key))
1724 PUSHs(key);
1725 PUTBACK;
1726
864dbfa3 1727 if (call_method(meth, G_SCALAR))
3280af22 1728 sv_setsv(key, *PL_stack_sp--);
463ee0b2 1729
d3acc0f7 1730 POPSTACK;
a0d0e21e
LW
1731 FREETMPS;
1732 LEAVE;
79072805
LW
1733 return 0;
1734}
1735
1736int
1146e912 1737Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e
LW
1738{
1739 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1740}
a0d0e21e 1741
a3bcc51e
TP
1742SV *
1743Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1744{
27da23d5 1745 dVAR; dSP;
5fcbf73d 1746 SV *retval;
8772537c
AL
1747 SV * const tied = SvTIED_obj((SV*)hv, mg);
1748 HV * const pkg = SvSTASH((SV*)SvRV(tied));
a3bcc51e
TP
1749
1750 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1751 SV *key;
bfcb3514 1752 if (HvEITER_get(hv))
a3bcc51e
TP
1753 /* we are in an iteration so the hash cannot be empty */
1754 return &PL_sv_yes;
1755 /* no xhv_eiter so now use FIRSTKEY */
1756 key = sv_newmortal();
1757 magic_nextpack((SV*)hv, mg, key);
bfcb3514 1758 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP
1759 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1760 }
1761
1762 /* there is a SCALAR method that we can call */
1763 ENTER;
1764 PUSHSTACKi(PERLSI_MAGIC);
1765 PUSHMARK(SP);
1766 EXTEND(SP, 1);
1767 PUSHs(tied);
1768 PUTBACK;
1769
1770 if (call_method("SCALAR", G_SCALAR))
1771 retval = *PL_stack_sp--;
5fcbf73d
AL
1772 else
1773 retval = &PL_sv_undef;
a3bcc51e
TP
1774 POPSTACK;
1775 LEAVE;
1776 return retval;
1777}
1778
a0d0e21e 1779int
864dbfa3 1780Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1781{
97aff369 1782 dVAR;
8772537c
AL
1783 GV * const gv = PL_DBline;
1784 const I32 i = SvTRUE(sv);
1785 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1786 atoi(MgPV_nolen_const(mg)), FALSE);
8772537c
AL
1787 if (svp && SvIOKp(*svp)) {
1788 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1789 if (o) {
1790 /* set or clear breakpoint in the relevant control op */
1791 if (i)
1792 o->op_flags |= OPf_SPECIAL;
1793 else
1794 o->op_flags &= ~OPf_SPECIAL;
1795 }
5df8de69 1796 }
79072805
LW
1797 return 0;
1798}
1799
1800int
8772537c 1801Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1802{
97aff369 1803 dVAR;
8772537c 1804 const AV * const obj = (AV*)mg->mg_obj;
83bf042f 1805 if (obj) {
fc15ae8f 1806 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC
1807 } else {
1808 SvOK_off(sv);
1809 }
79072805
LW
1810 return 0;
1811}
1812
1813int
864dbfa3 1814Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1815{
97aff369 1816 dVAR;
8772537c 1817 AV * const obj = (AV*)mg->mg_obj;
83bf042f 1818 if (obj) {
fc15ae8f 1819 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f
NC
1820 } else {
1821 if (ckWARN(WARN_MISC))
1822 Perl_warner(aTHX_ packWARN(WARN_MISC),
1823 "Attempt to set length of freed array");
1824 }
1825 return 0;
1826}
1827
1828int
1829Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1830{
97aff369 1831 dVAR;
53c1dcc0 1832 PERL_UNUSED_ARG(sv);
94f3782b
DM
1833 /* during global destruction, mg_obj may already have been freed */
1834 if (PL_in_clean_all)
1ea47f64 1835 return 0;
94f3782b 1836
83bf042f
NC
1837 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1838
1839 if (mg) {
1840 /* arylen scalar holds a pointer back to the array, but doesn't own a
1841 reference. Hence the we (the array) are about to go away with it
1842 still pointing at us. Clear its pointer, else it would be pointing
1843 at free memory. See the comment in sv_magic about reference loops,
1844 and why it can't own a reference to us. */
1845 mg->mg_obj = 0;
1846 }
a0d0e21e
LW
1847 return 0;
1848}
1849
1850int
864dbfa3 1851Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1852{
97aff369 1853 dVAR;
8772537c 1854 SV* const lsv = LvTARG(sv);
3881461a 1855 PERL_UNUSED_ARG(mg);
ac27b0f5 1856
a0d0e21e 1857 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL
1858 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1859 if (found && found->mg_len >= 0) {
1860 I32 i = found->mg_len;
7e2040f0 1861 if (DO_UTF8(lsv))
a0ed51b3 1862 sv_pos_b2u(lsv, &i);
fc15ae8f 1863 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW
1864 return 0;
1865 }
1866 }
0c34ef67 1867 SvOK_off(sv);
a0d0e21e
LW
1868 return 0;
1869}
1870
1871int
864dbfa3 1872Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1873{
97aff369 1874 dVAR;
8772537c 1875 SV* const lsv = LvTARG(sv);
a0d0e21e
LW
1876 SSize_t pos;
1877 STRLEN len;
c00206c8 1878 STRLEN ulen = 0;
53d44271 1879 MAGIC* found;
a0d0e21e 1880
3881461a 1881 PERL_UNUSED_ARG(mg);
ac27b0f5 1882
a0d0e21e 1883 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL
1884 found = mg_find(lsv, PERL_MAGIC_regex_global);
1885 else
1886 found = NULL;
1887 if (!found) {
a0d0e21e
LW
1888 if (!SvOK(sv))
1889 return 0;
d83f0a82
NC
1890#ifdef PERL_OLD_COPY_ON_WRITE
1891 if (SvIsCOW(lsv))
1892 sv_force_normal_flags(lsv, 0);
1893#endif
3881461a 1894 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 1895 NULL, 0);
a0d0e21e
LW
1896 }
1897 else if (!SvOK(sv)) {
3881461a 1898 found->mg_len = -1;
a0d0e21e
LW
1899 return 0;
1900 }
1901 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1902
fc15ae8f 1903 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 1904
7e2040f0 1905 if (DO_UTF8(lsv)) {
a0ed51b3
LW
1906 ulen = sv_len_utf8(lsv);
1907 if (ulen)
1908 len = ulen;
a0ed51b3
LW
1909 }
1910
a0d0e21e
LW
1911 if (pos < 0) {
1912 pos += len;
1913 if (pos < 0)
1914 pos = 0;
1915 }
eb160463 1916 else if (pos > (SSize_t)len)
a0d0e21e 1917 pos = len;
a0ed51b3
LW
1918
1919 if (ulen) {
1920 I32 p = pos;
1921 sv_pos_u2b(lsv, &p, 0);
1922 pos = p;
1923 }
727405f8 1924
3881461a
AL
1925 found->mg_len = pos;
1926 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 1927
79072805
LW
1928 return 0;
1929}
1930
1931int
864dbfa3 1932Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS
1933{
1934 STRLEN len;
35a4481c 1935 SV * const lsv = LvTARG(sv);
b83604b4 1936 const char * const tmps = SvPV_const(lsv,len);
6ff81951
GS
1937 I32 offs = LvTARGOFF(sv);
1938 I32 rem = LvTARGLEN(sv);
8772537c 1939 PERL_UNUSED_ARG(mg);
6ff81951 1940
9aa983d2
JH
1941 if (SvUTF8(lsv))
1942 sv_pos_u2b(lsv, &offs, &rem);
eb160463 1943 if (offs > (I32)len)
6ff81951 1944 offs = len;
eb160463 1945 if (rem + offs > (I32)len)
6ff81951
GS
1946 rem = len - offs;
1947 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
9aa983d2 1948 if (SvUTF8(lsv))
2ef4b674 1949 SvUTF8_on(sv);
6ff81951
GS
1950 return 0;
1951}
1952
1953int
864dbfa3 1954Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 1955{
97aff369 1956 dVAR;
9aa983d2 1957 STRLEN len;
5fcbf73d 1958 const char * const tmps = SvPV_const(sv, len);
dd374669 1959 SV * const lsv = LvTARG(sv);
9aa983d2
JH
1960 I32 lvoff = LvTARGOFF(sv);
1961 I32 lvlen = LvTARGLEN(sv);
8772537c 1962 PERL_UNUSED_ARG(mg);
075a4a2b 1963
1aa99e6b 1964 if (DO_UTF8(sv)) {
9aa983d2
JH
1965 sv_utf8_upgrade(lsv);
1966 sv_pos_u2b(lsv, &lvoff, &lvlen);
1967 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 1968 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH
1969 SvUTF8_on(lsv);
1970 }
9bf12eaf 1971 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 1972 const char *utf8;
9aa983d2 1973 sv_pos_u2b(lsv, &lvoff, &lvlen);
b76f3ce2 1974 LvTARGLEN(sv) = len;
5fcbf73d
AL
1975 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1976 sv_insert(lsv, lvoff, lvlen, utf8, len);
1977 Safefree(utf8);
1aa99e6b 1978 }
b76f3ce2
GB
1979 else {
1980 sv_insert(lsv, lvoff, lvlen, tmps, len);
1981 LvTARGLEN(sv) = len;
1982 }
1983
1aa99e6b 1984
79072805
LW
1985 return 0;
1986}
1987
1988int
864dbfa3 1989Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1990{
97aff369 1991 dVAR;
8772537c 1992 PERL_UNUSED_ARG(sv);
27cc343c 1993 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW
1994 return 0;
1995}
1996
1997int
864dbfa3 1998Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1999{
97aff369 2000 dVAR;
8772537c 2001 PERL_UNUSED_ARG(sv);
b01e650a
DM
2002 /* update taint status */
2003 if (PL_tainted)
2004 mg->mg_len |= 1;
2005 else
2006 mg->mg_len &= ~1;
463ee0b2
LW
2007 return 0;
2008}
2009
2010int
864dbfa3 2011Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2012{
35a4481c 2013 SV * const lsv = LvTARG(sv);
8772537c 2014 PERL_UNUSED_ARG(mg);
6ff81951 2015
6136c704
AL
2016 if (lsv)
2017 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2018 else
0c34ef67 2019 SvOK_off(sv);
6ff81951 2020
6ff81951
GS
2021 return 0;
2022}
2023
2024int
864dbfa3 2025Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2026{
8772537c 2027 PERL_UNUSED_ARG(mg);
79072805
LW
2028 do_vecset(sv); /* XXX slurp this routine */
2029 return 0;
2030}
2031
2032int
864dbfa3 2033Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2034{
97aff369 2035 dVAR;
a0714e2c 2036 SV *targ = NULL;
5f05dabc 2037 if (LvTARGLEN(sv)) {
68dc0745 2038 if (mg->mg_obj) {
8772537c
AL
2039 SV * const ahv = LvTARG(sv);
2040 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
6d822dc4
MS
2041 if (he)
2042 targ = HeVAL(he);
68dc0745
PP
2043 }
2044 else {
8772537c 2045 AV* const av = (AV*)LvTARG(sv);
68dc0745
PP
2046 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2047 targ = AvARRAY(av)[LvTARGOFF(sv)];
2048 }
46da273f 2049 if (targ && (targ != &PL_sv_undef)) {
68dc0745
PP
2050 /* somebody else defined it for us */
2051 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2052 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745
PP
2053 LvTARGLEN(sv) = 0;
2054 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2055 mg->mg_obj = NULL;
68dc0745
PP
2056 mg->mg_flags &= ~MGf_REFCOUNTED;
2057 }
5f05dabc 2058 }
71be2cbc
PP
2059 else
2060 targ = LvTARG(sv);
3280af22 2061 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc
PP
2062 return 0;
2063}
2064
2065int
864dbfa3 2066Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2067{
8772537c 2068 PERL_UNUSED_ARG(mg);
71be2cbc 2069 if (LvTARGLEN(sv))
68dc0745
PP
2070 vivify_defelem(sv);
2071 if (LvTARG(sv)) {
5f05dabc 2072 sv_setsv(LvTARG(sv), sv);
68dc0745
PP
2073 SvSETMAGIC(LvTARG(sv));
2074 }
5f05dabc
PP
2075 return 0;
2076}
2077
71be2cbc 2078void
864dbfa3 2079Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2080{
97aff369 2081 dVAR;
74e13ce4 2082 MAGIC *mg;
a0714e2c 2083 SV *value = NULL;
71be2cbc 2084
14befaf4 2085 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2086 return;
68dc0745 2087 if (mg->mg_obj) {
8772537c
AL
2088 SV * const ahv = LvTARG(sv);
2089 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
6d822dc4
MS
2090 if (he)
2091 value = HeVAL(he);
3280af22 2092 if (!value || value == &PL_sv_undef)
be2597df 2093 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2094 }
68dc0745 2095 else {
8772537c 2096 AV* const av = (AV*)LvTARG(sv);
5aabfad6 2097 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2098 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2099 else {
d4c19fe8 2100 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2101 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2102 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745
PP
2103 }
2104 }
b37c2d43 2105 SvREFCNT_inc_simple_void(value);
68dc0745
PP
2106 SvREFCNT_dec(LvTARG(sv));
2107 LvTARG(sv) = value;
71be2cbc 2108 LvTARGLEN(sv) = 0;
68dc0745 2109 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2110 mg->mg_obj = NULL;
68dc0745 2111 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc
PP
2112}
2113
2114int
864dbfa3 2115Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2116{
86f55936 2117 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
810b8aa5
GS
2118}
2119
2120int
864dbfa3 2121Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2122{
96a5add6 2123 PERL_UNUSED_CONTEXT;
565764a8 2124 mg->mg_len = -1;
c6496cc7 2125 SvSCREAM_off(sv);
93a17b20
LW
2126 return 0;
2127}
2128
2129int
864dbfa3 2130Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2131{
35a4481c 2132 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805
LW
2133
2134 if (uf && uf->uf_set)
24f81a43 2135 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW
2136 return 0;
2137}
2138
c277df42 2139int
faf82a0b
AE
2140Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2141{
488344d2
NC
2142 const char type = mg->mg_type;
2143 if (type == PERL_MAGIC_qr) {
2144 } else if (type == PERL_MAGIC_bm) {
2145 SvTAIL_off(sv);
2146 SvVALID_off(sv);
2147 } else {
2148 assert(type == PERL_MAGIC_fm);
2149 SvCOMPILED_off(sv);
2150 }
2151 return sv_unmagic(sv, type);
faf82a0b
AE
2152}
2153
7a4c00b4 2154#ifdef USE_LOCALE_COLLATE
79072805 2155int
864dbfa3 2156Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69
PP
2157{
2158 /*
838b5b74 2159 * RenE<eacute> Descartes said "I think not."
bbce6d69
PP
2160 * and vanished with a faint plop.
2161 */
96a5add6 2162 PERL_UNUSED_CONTEXT;
8772537c 2163 PERL_UNUSED_ARG(sv);
7a4c00b4
PP
2164 if (mg->mg_ptr) {
2165 Safefree(mg->mg_ptr);
2166 mg->mg_ptr = NULL;
565764a8 2167 mg->mg_len = -1;
7a4c00b4 2168 }
bbce6d69
PP
2169 return 0;
2170}
7a4c00b4 2171#endif /* USE_LOCALE_COLLATE */
bbce6d69 2172
7e8c5dac
HS
2173/* Just clear the UTF-8 cache data. */
2174int
2175Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2176{
96a5add6 2177 PERL_UNUSED_CONTEXT;
8772537c 2178 PERL_UNUSED_ARG(sv);
7e8c5dac 2179 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2180 mg->mg_ptr = NULL;
7e8c5dac
HS
2181 mg->mg_len = -1; /* The mg_len holds the len cache. */
2182 return 0;
2183}
2184
bbce6d69 2185int
864dbfa3 2186Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2187{
97aff369 2188 dVAR;
e1ec3a88 2189 register const char *s;
2fdbfb4d
AB
2190 register I32 paren;
2191 register const REGEXP * rx;
2192 const char * const remaining = mg->mg_ptr + 1;
79072805 2193 I32 i;
8990e307 2194 STRLEN len;
2fdbfb4d 2195
79072805 2196 switch (*mg->mg_ptr) {
2fdbfb4d
AB
2197 case '\015': /* $^MATCH */
2198 if (strEQ(remaining, "ATCH"))
2199 goto do_match;
2200 case '`': /* ${^PREMATCH} caught below */
2201 do_prematch:
f1b875a0 2202 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB
2203 goto setparen;
2204 case '\'': /* ${^POSTMATCH} caught below */
2205 do_postmatch:
f1b875a0 2206 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB
2207 goto setparen;
2208 case '&':
2209 do_match:
f1b875a0 2210 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB
2211 goto setparen;
2212 case '1': case '2': case '3': case '4':
2213 case '5': case '6': case '7': case '8': case '9':
104a8018 2214 paren = atoi(mg->mg_ptr);
2fdbfb4d 2215 setparen:
1e05feb3 2216 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB
2217 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2218 break;
1e05feb3 2219 } else {
2fdbfb4d
AB
2220 /* Croak with a READONLY error when a numbered match var is
2221 * set without a previous pattern match. Unless it's C<local $1>
2222 */
2223 if (!PL_localizing) {
2224 Perl_croak(aTHX_ PL_no_modify);
2225 }
2226 }
748a9306 2227 case '\001': /* ^A */
3280af22 2228 sv_setsv(PL_bodytarget, sv);
748a9306 2229 break;
49460fe6 2230 case '\003': /* ^C */
38ab35f8 2231 PL_minus_c = (bool)SvIV(sv);
49460fe6
NIS
2232 break;
2233
79072805 2234 case '\004': /* ^D */
b4ab917c 2235#ifdef DEBUGGING
b83604b4 2236 s = SvPV_nolen_const(sv);
ddcf8bc1 2237 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
79072805 2238 DEBUG_x(dump_all());
b4ab917c 2239#else
38ab35f8 2240 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2241#endif
79072805 2242 break;
28f23441 2243 case '\005': /* ^E */
d0063567 2244 if (*(mg->mg_ptr+1) == '\0') {
cd39f2b6 2245#ifdef MACOS_TRADITIONAL
38ab35f8 2246 gMacPerl_OSErr = SvIV(sv);
28f23441 2247#else
cd39f2b6 2248# ifdef VMS
38ab35f8 2249 set_vaxc_errno(SvIV(sv));
048c1ddf 2250# else
cd39f2b6 2251# ifdef WIN32
d0063567 2252 SetLastError( SvIV(sv) );
cd39f2b6 2253# else
9fed8b87 2254# ifdef OS2
38ab35f8 2255 os2_setsyserrno(SvIV(sv));
9fed8b87 2256# else
d0063567 2257 /* will anyone ever use this? */
38ab35f8 2258 SETERRNO(SvIV(sv), 4);
cd39f2b6 2259# endif
048c1ddf
IZ
2260# endif
2261# endif
22fae026 2262#endif
d0063567
DK
2263 }
2264 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2265 if (PL_encoding)
2266 SvREFCNT_dec(PL_encoding);
2267 if (SvOK(sv) || SvGMAGICAL(sv)) {
2268 PL_encoding = newSVsv(sv);
2269 }
2270 else {
a0714e2c 2271 PL_encoding = NULL;
d0063567
DK
2272 }
2273 }
2274 break;
79072805 2275 case '\006': /* ^F */
38ab35f8 2276 PL_maxsysfd = SvIV(sv);
79072805 2277 break;
a0d0e21e 2278 case '\010': /* ^H */
38ab35f8 2279 PL_hints = SvIV(sv);
a0d0e21e 2280 break;
9d116dd7 2281 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2282 Safefree(PL_inplace);
bd61b366 2283 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2284 break;
28f23441 2285 case '\017': /* ^O */
ac27b0f5 2286 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2287 Safefree(PL_osname);
bd61b366 2288 PL_osname = NULL;
3511154c
DM
2289 if (SvOK(sv)) {
2290 TAINT_PROPER("assigning to $^O");
2e0de35c 2291 PL_osname = savesvpv(sv);
3511154c 2292 }
ac27b0f5
NIS
2293 }
2294 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC
2295 STRLEN len;
2296 const char *const start = SvPV(sv, len);
b54fc2b6 2297 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5
NC
2298 SV *tmp;
2299 struct refcounted_he *tmp_he;
2300
2301
2302 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2303 PL_hints
2304 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2305
2306 /* Opening for input is more common than opening for output, so
2307 ensure that hints for input are sooner on linked list. */
2308 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2309 : newSVpvs(""));
2310 SvFLAGS(tmp) |= SvUTF8(sv);
2311
2312 tmp_he
2313 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2314 sv_2mortal(newSVpvs("open>")), tmp);
2315
2316 /* The UTF-8 setting is carried over */
2317 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2318
11bcd5da 2319 PL_compiling.cop_hints_hash
8b850bd5
NC
2320 = Perl_refcounted_he_new(aTHX_ tmp_he,
2321 sv_2mortal(newSVpvs("open<")), tmp);
ac27b0f5 2322 }
28f23441 2323 break;
79072805 2324 case '\020': /* ^P */
2fdbfb4d
AB
2325 if (*remaining == '\0') { /* ^P */
2326 PL_perldb = SvIV(sv);
2327 if (PL_perldb && !PL_DBsingle)
2328 init_debugger();
2329 break;
2330 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2331 goto do_prematch;
2332 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2333 goto do_postmatch;
2334 }
79072805 2335 case '\024': /* ^T */
88e89b8a 2336#ifdef BIG_TIME
6b88bc9c 2337 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2338#else
38ab35f8 2339 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2340#endif
79072805 2341 break;
e07ea26a
NC
2342 case '\025': /* ^UTF8CACHE */
2343 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2344 PL_utf8cache = (signed char) sv_2iv(sv);
2345 }
2346 break;
fde18df1 2347 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH
2348 if (*(mg->mg_ptr+1) == '\0') {
2349 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2350 i = SvIV(sv);
ac27b0f5 2351 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2352 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2353 }
599cee73 2354 }
0a378802 2355 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2356 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS
2357 if (!SvPOK(sv) && PL_localizing) {
2358 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2359 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS
2360 break;
2361 }
f4fc7782 2362 {
b5477537 2363 STRLEN len, i;
d3a7d8c7 2364 int accumulate = 0 ;
f4fc7782 2365 int any_fatals = 0 ;
b83604b4 2366 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH
2367 for (i = 0 ; i < len ; ++i) {
2368 accumulate |= ptr[i] ;
2369 any_fatals |= (ptr[i] & 0xAA) ;
2370 }
4243c432
NC
2371 if (!accumulate) {
2372 if (!specialWARN(PL_compiling.cop_warnings))
2373 PerlMemShared_free(PL_compiling.cop_warnings);
2374 PL_compiling.cop_warnings = pWARN_NONE;
2375 }
72dc9ed5
NC
2376 /* Yuck. I can't see how to abstract this: */
2377 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2378 WARN_ALL) && !any_fatals) {
4243c432
NC
2379 if (!specialWARN(PL_compiling.cop_warnings))
2380 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH
2381 PL_compiling.cop_warnings = pWARN_ALL;
2382 PL_dowarn |= G_WARN_ONCE ;
727405f8 2383 }
d3a7d8c7 2384 else {
72dc9ed5
NC
2385 STRLEN len;
2386 const char *const p = SvPV_const(sv, len);
2387
2388 PL_compiling.cop_warnings
8ee4cf24 2389 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC
2390 p, len);
2391
d3a7d8c7
GS
2392 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2393 PL_dowarn |= G_WARN_ONCE ;
2394 }
f4fc7782 2395
d3a7d8c7 2396 }
4438c4b7 2397 }
971a9dd3 2398 }
79072805
LW
2399 break;
2400 case '.':
3280af22
NIS
2401 if (PL_localizing) {
2402 if (PL_localizing == 1)
7766f137 2403 SAVESPTR(PL_last_in_gv);
748a9306 2404 }
3280af22 2405 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2406 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW
2407 break;
2408 case '^':
3280af22 2409 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2410 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2411 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2412 break;
2413 case '~':
3280af22 2414 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
e1ec3a88 2415 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
f776e3cd 2416 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
79072805
LW
2417 break;
2418 case '=':
38ab35f8 2419 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2420 break;
2421 case '-':
38ab35f8 2422 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
3280af22
NIS
2423 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2424 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
79072805
LW
2425 break;
2426 case '%':
38ab35f8 2427 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW
2428 break;
2429 case '|':
4b65379b 2430 {
8772537c 2431 IO * const io = GvIOp(PL_defoutgv);
720f287d
AB
2432 if(!io)
2433 break;
38ab35f8 2434 if ((SvIV(sv)) == 0)
4b65379b
CS
2435 IoFLAGS(io) &= ~IOf_FLUSH;
2436 else {
2437 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2438 PerlIO *ofp = IoOFP(io);
2439 if (ofp)
2440 (void)PerlIO_flush(ofp);
2441 IoFLAGS(io) |= IOf_FLUSH;
2442 }
2443 }
79072805
LW
2444 }
2445 break;
79072805 2446 case '/':
3280af22 2447 SvREFCNT_dec(PL_rs);
8bfdd7d9 2448 PL_rs = newSVsv(sv);
79072805
LW
2449 break;
2450 case '\\':
7889fe52
NIS
2451 if (PL_ors_sv)
2452 SvREFCNT_dec(PL_ors_sv);
009c130f 2453 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2454 PL_ors_sv = newSVsv(sv);
009c130f 2455 }
e3c19b7b 2456 else {
a0714e2c 2457 PL_ors_sv = NULL;
e3c19b7b 2458 }
79072805
LW
2459 break;
2460 case ',':
7889fe52
NIS
2461 if (PL_ofs_sv)
2462 SvREFCNT_dec(PL_ofs_sv);
2463 if (SvOK(sv) || SvGMAGICAL(sv)) {
2464 PL_ofs_sv = newSVsv(sv);
2465 }
2466 else {
a0714e2c 2467 PL_ofs_sv = NULL;
7889fe52 2468 }
79072805 2469 break;
79072805 2470 case '[':
38ab35f8 2471 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW
2472 break;
2473 case '?':
ff0cee69 2474#ifdef COMPLEX_STATUS
6b88bc9c
GS
2475 if (PL_localizing == 2) {
2476 PL_statusvalue = LvTARGOFF(sv);
2477 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69
PP
2478 }
2479 else
2480#endif
2481#ifdef VMSISH_STATUS
2482 if (VMSISH_STATUS)
fb38d079 2483 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69
PP
2484 else
2485#endif
38ab35f8 2486 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW
2487 break;
2488 case '!':
93189314
JH
2489 {
2490#ifdef VMS
2491# define PERL_VMS_BANG vaxc$errno
2492#else
2493# define PERL_VMS_BANG 0
2494#endif
91487cfc 2495 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH
2496 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2497 }
79072805
LW
2498 break;
2499 case '<':
38ab35f8 2500 PL_uid = SvIV(sv);
3280af22
NIS
2501 if (PL_delaymagic) {
2502 PL_delaymagic |= DM_RUID;
79072805
LW
2503 break; /* don't do magic till later */
2504 }
2505#ifdef HAS_SETRUID
b28d0864 2506 (void)setruid((Uid_t)PL_uid);
79072805
LW
2507#else
2508#ifdef HAS_SETREUID
3280af22 2509 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2510#else
85e6fe83 2511#ifdef HAS_SETRESUID
b28d0864 2512 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2513#else
75870ed3 2514 if (PL_uid == PL_euid) { /* special case $< = $> */
2515#ifdef PERL_DARWIN
2516 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2517 if (PL_uid != 0 && PerlProc_getuid() == 0)
2518 (void)PerlProc_setuid(0);
2519#endif
b28d0864 2520 (void)PerlProc_setuid(PL_uid);
75870ed3 2521 } else {
d8eceb89 2522 PL_uid = PerlProc_getuid();
cea2e8a9 2523 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2524 }
79072805
LW
2525#endif
2526#endif
85e6fe83 2527#endif
d8eceb89 2528 PL_uid = PerlProc_getuid();
3280af22 2529 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2530 break;
2531 case '>':
38ab35f8 2532 PL_euid = SvIV(sv);
3280af22
NIS
2533 if (PL_delaymagic) {
2534 PL_delaymagic |= DM_EUID;
79072805
LW
2535 break; /* don't do magic till later */
2536 }
2537#ifdef HAS_SETEUID
3280af22 2538 (void)seteuid((Uid_t)PL_euid);
79072805
LW
2539#else
2540#ifdef HAS_SETREUID
b28d0864 2541 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW
2542#else
2543#ifdef HAS_SETRESUID
6b88bc9c 2544 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2545#else
b28d0864
NIS
2546 if (PL_euid == PL_uid) /* special case $> = $< */
2547 PerlProc_setuid(PL_euid);
a0d0e21e 2548 else {
e8ee3774 2549 PL_euid = PerlProc_geteuid();
cea2e8a9 2550 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2551 }
79072805
LW
2552#endif
2553#endif
85e6fe83 2554#endif
d8eceb89 2555 PL_euid = PerlProc_geteuid();
3280af22 2556 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2557 break;
2558 case '(':
38ab35f8 2559 PL_gid = SvIV(sv);
3280af22
NIS
2560 if (PL_delaymagic) {
2561 PL_delaymagic |= DM_RGID;
79072805
LW
2562 break; /* don't do magic till later */
2563 }
2564#ifdef HAS_SETRGID
b28d0864 2565 (void)setrgid((Gid_t)PL_gid);
79072805
LW
2566#else
2567#ifdef HAS_SETREGID
3280af22 2568 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW
2569#else
2570#ifdef HAS_SETRESGID
b28d0864 2571 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2572#else
b28d0864
NIS
2573 if (PL_gid == PL_egid) /* special case $( = $) */
2574 (void)PerlProc_setgid(PL_gid);
748a9306 2575 else {
d8eceb89 2576 PL_gid = PerlProc_getgid();
cea2e8a9 2577 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2578 }
79072805
LW
2579#endif
2580#endif
85e6fe83 2581#endif
d8eceb89 2582 PL_gid = PerlProc_getgid();
3280af22 2583 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2584 break;
2585 case ')':
5cd24f17
PP
2586#ifdef HAS_SETGROUPS
2587 {
b83604b4 2588 const char *p = SvPV_const(sv, len);
757f63d8
SP
2589 Groups_t *gary = NULL;
2590
2591 while (isSPACE(*p))
2592 ++p;
2593 PL_egid = Atol(p);
2594 for (i = 0; i < NGROUPS; ++i) {
2595 while (*p && !isSPACE(*p))
2596 ++p;
2597 while (isSPACE(*p))
2598 ++p;
2599 if (!*p)
2600 break;
2601 if(!gary)
2602 Newx(gary, i + 1, Groups_t);
2603 else
2604 Renew(gary, i + 1, Groups_t);
2605 gary[i] = Atol(p);
2606 }
2607 if (i)
2608 (void)setgroups(i, gary);
f5a63d97 2609 Safefree(gary);
5cd24f17
PP
2610 }
2611#else /* HAS_SETGROUPS */
38ab35f8 2612 PL_egid = SvIV(sv);
5cd24f17 2613#endif /* HAS_SETGROUPS */
3280af22
NIS
2614 if (PL_delaymagic) {
2615 PL_delaymagic |= DM_EGID;
79072805
LW
2616 break; /* don't do magic till later */
2617 }
2618#ifdef HAS_SETEGID
3280af22 2619 (void)setegid((Gid_t)PL_egid);
79072805
LW
2620#else
2621#ifdef HAS_SETREGID
b28d0864 2622 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW
2623#else
2624#ifdef HAS_SETRESGID
b28d0864 2625 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2626#else
b28d0864
NIS
2627 if (PL_egid == PL_gid) /* special case $) = $( */
2628 (void)PerlProc_setgid(PL_egid);
748a9306 2629 else {
d8eceb89 2630 PL_egid = PerlProc_getegid();
cea2e8a9 2631 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2632 }
79072805
LW
2633#endif
2634#endif
85e6fe83 2635#endif
d8eceb89 2636 PL_egid = PerlProc_getegid();
3280af22 2637 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
79072805
LW
2638 break;
2639 case ':':
2d8e6c8d 2640 PL_chopset = SvPV_force(sv,len);
79072805 2641 break;
cd39f2b6 2642#ifndef MACOS_TRADITIONAL
79072805 2643 case '0':
e2975953 2644 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS
2645#ifdef HAS_SETPROCTITLE
2646 /* The BSDs don't show the argv[] in ps(1) output, they
2647 * show a string from the process struct and provide
2648 * the setproctitle() routine to manipulate that. */
a2722ac9 2649 if (PL_origalen != 1) {
b83604b4 2650 s = SvPV_const(sv, len);
98b76f99 2651# if __FreeBSD_version > 410001
9aad2c0e 2652 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS
2653 * but not the "(perl) suffix from the ps(1)
2654 * output, because that's what ps(1) shows if the
2655 * argv[] is modified. */
6f2ad931 2656 setproctitle("-%s", s);
9aad2c0e 2657# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS
2658 /* This doesn't really work if you assume that
2659 * $0 = 'foobar'; will wipe out 'perl' from the $0
2660 * because in ps(1) output the result will be like
2661 * sprintf("perl: %s (perl)", s)
2662 * I guess this is a security feature:
2663 * one (a user process) cannot get rid of the original name.
2664 * --jhi */
2665 setproctitle("%s", s);
2666# endif
2667 }
9d3968b2 2668#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2669 if (PL_origalen != 1) {
17aa7f3d 2670 union pstun un;
b83604b4 2671 s = SvPV_const(sv, len);
6867be6d 2672 un.pst_command = (char *)s;
17aa7f3d
JH
2673 pstat(PSTAT_SETCMD, un, len, 0, 0);
2674 }
9d3968b2 2675#else
2d2af554
GA
2676 if (PL_origalen > 1) {
2677 /* PL_origalen is set in perl_parse(). */
2678 s = SvPV_force(sv,len);
2679 if (len >= (STRLEN)PL_origalen-1) {
2680 /* Longer than original, will be truncated. We assume that
2681 * PL_origalen bytes are available. */
2682 Copy(s, PL_origargv[0], PL_origalen-1, char);
2683 }
2684 else {
2685 /* Shorter than original, will be padded. */
235ac35d 2686#ifdef PERL_DARWIN
60777a0d
JH
2687 /* Special case for Mac OS X: see [perl #38868] */
2688 const int pad = 0;
235ac35d 2689#else
8a89a4f1
MB
2690 /* Is the space counterintuitive? Yes.
2691 * (You were expecting \0?)
2692 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2693 * --jhi */
60777a0d 2694 const int pad = ' ';
235ac35d 2695#endif
60777a0d
JH
2696 Copy(s, PL_origargv[0], len, char);
2697 PL_origargv[0][len] = 0;
2698 memset(PL_origargv[0] + len + 1,
2699 pad, PL_origalen - len - 1);
2d2af554
GA
2700 }
2701 PL_origargv[0][PL_origalen-1] = 0;
2702 for (i = 1; i < PL_origargc; i++)
2703 PL_origargv[i] = 0;
79072805 2704 }
9d3968b2 2705#endif
e2975953 2706 UNLOCK_DOLLARZERO_MUTEX;
79072805 2707 break;
cd39f2b6 2708#endif
79072805
LW
2709 }
2710 return 0;
2711}
2712
2713I32
35a4481c 2714Perl_whichsig(pTHX_ const char *sig)
79072805 2715{
aadb217d 2716 register char* const* sigv;
96a5add6 2717 PERL_UNUSED_CONTEXT;
79072805 2718
aadb217d 2719 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2720 if (strEQ(sig,*sigv))
aadb217d 2721 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW
2722#ifdef SIGCLD
2723 if (strEQ(sig,"CHLD"))
2724 return SIGCLD;
2725#endif
2726#ifdef SIGCHLD
2727 if (strEQ(sig,"CLD"))
2728 return SIGCHLD;
2729#endif
7f1236c0 2730 return -1;
79072805
LW
2731}
2732
ecfc5424 2733Signal_t
1e82f5a6 2734#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 2735Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
1e82f5a6
SH
2736#else
2737Perl_sighandler(int sig)
2738#endif
79072805 2739{
1018e26f
NIS
2740#ifdef PERL_GET_SIG_CONTEXT
2741 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2742#else
cea2e8a9 2743 dTHX;
71d280e3 2744#endif
79072805 2745 dSP;
a0714e2c
SS
2746 GV *gv = NULL;
2747 SV *sv = NULL;
8772537c 2748 SV * const tSv = PL_Sv;
601f1833 2749 CV *cv = NULL;
533c011a 2750 OP *myop = PL_op;
84902520 2751 U32 flags = 0;
8772537c 2752 XPV * const tXpv = PL_Xpv;
71d280e3 2753
3280af22 2754 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2755 flags |= 1;
3280af22 2756 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2757 flags |= 4;
3280af22 2758 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB
2759 flags |= 16;
2760
727405f8 2761 if (!PL_psig_ptr[sig]) {
99ef548b 2762 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS
2763 PL_sig_name[sig]);
2764 exit(sig);
2765 }
ff0cee69 2766
84902520
TB
2767 /* Max number of items pushed there is 3*n or 4. We cannot fix
2768 infinity, so we fix 4 (in fact 5): */
2769 if (flags & 1) {
3280af22 2770 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2771 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2772 }
ac27b0f5 2773 if (flags & 4)
3280af22 2774 PL_markstack_ptr++; /* Protect mark. */
84902520 2775 if (flags & 16)
3280af22 2776 PL_scopestack_ix += 1;
84902520 2777 /* sv_2cv is too complicated, try a simpler variant first: */
ac27b0f5 2778 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
8772537c
AL
2779 || SvTYPE(cv) != SVt_PVCV) {
2780 HV *st;
f2c0649b 2781 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2782 }
84902520 2783
a0d0e21e 2784 if (!cv || !CvROOT(cv)) {
599cee73 2785 if (ckWARN(WARN_SIGNAL))
9014280d 2786 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
22c35a8c 2787 PL_sig_name[sig], (gv ? GvENAME(gv)
00d579c5
GS
2788 : ((cv && CvGV(cv))
2789 ? GvENAME(CvGV(cv))
2790 : "__ANON__")));
2791 goto cleanup;
79072805
LW
2792 }
2793
22c35a8c 2794 if(PL_psig_name[sig]) {
b37c2d43 2795 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2796 flags |= 64;
df3728a2 2797#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2798 PL_sig_sv = sv;
df3728a2 2799#endif
84902520 2800 } else {
ff0cee69 2801 sv = sv_newmortal();
22c35a8c 2802 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2803 }
e336de0d 2804
e788e7d3 2805 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2806 PUSHMARK(SP);
79072805 2807 PUSHs(sv);
8aad04aa
JH
2808#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2809 {
2810 struct sigaction oact;
2811
2812 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH
2813 if (sip) {
2814 HV *sih = newHV();
2815 SV *rv = newRV_noinc((SV*)sih);
2816 /* The siginfo fields signo, code, errno, pid, uid,
2817 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC
2818 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
2819 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 2820#if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
85771703
NC
2821 hv_stores(sih, "errno", newSViv(sip->si_errno));
2822 hv_stores(sih, "status", newSViv(sip->si_status));
2823 hv_stores(sih, "uid", newSViv(sip->si_uid));
2824 hv_stores(sih, "pid", newSViv(sip->si_pid));
2825 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
2826 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 2827#endif
8aad04aa
JH
2828 EXTEND(SP, 2);
2829 PUSHs((SV*)rv);
9ff8e806 2830 PUSHs(newSVpvn((char *)sip, sizeof(*sip)));
8aad04aa 2831 }
b4552a27 2832
8aad04aa
JH
2833 }
2834 }
2835#endif
79072805 2836 PUTBACK;
a0d0e21e 2837
1b266415 2838 call_sv((SV*)cv, G_DISCARD|G_EVAL);
79072805 2839
d3acc0f7 2840 POPSTACK;
1b266415 2841 if (SvTRUE(ERRSV)) {
1d615522 2842#ifndef PERL_MICRO
983dbef6 2843#ifdef HAS_SIGPROCMASK
1b266415
NIS
2844 /* Handler "died", for example to get out of a restart-able read().
2845 * Before we re-do that on its behalf re-enable the signal which was
2846 * blocked by the system when we entered.
2847 */
2848 sigset_t set;
2849 sigemptyset(&set);
2850 sigaddset(&set,sig);
2851 sigprocmask(SIG_UNBLOCK, &set, NULL);
2852#else
2853 /* Not clear if this will work */
2854 (void)rsignal(sig, SIG_IGN);
5c1546dc 2855 (void)rsignal(sig, PL_csighandlerp);
1b266415 2856#endif
1d615522 2857#endif /* !PERL_MICRO */
bd61b366 2858 Perl_die(aTHX_ NULL);
1b266415 2859 }
00d579c5 2860cleanup:
84902520 2861 if (flags & 1)
3280af22 2862 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 2863 if (flags & 4)
3280af22 2864 PL_markstack_ptr--;
84902520 2865 if (flags & 16)
3280af22 2866 PL_scopestack_ix -= 1;
84902520
TB
2867 if (flags & 64)
2868 SvREFCNT_dec(sv);
533c011a 2869 PL_op = myop; /* Apparently not needed... */
ac27b0f5 2870
3280af22
NIS
2871 PL_Sv = tSv; /* Restore global temporaries. */
2872 PL_Xpv = tXpv;
53bb94e2 2873 return;
79072805 2874}
4e35701f
NIS
2875
2876
51371543 2877static void
8772537c 2878S_restore_magic(pTHX_ const void *p)
51371543 2879{
97aff369 2880 dVAR;
8772537c
AL
2881 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2882 SV* const sv = mgs->mgs_sv;
51371543
GS
2883
2884 if (!sv)
2885 return;
2886
2887 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2888 {
f8c7b90f 2889#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC
2890 /* While magic was saved (and off) sv_setsv may well have seen
2891 this SV as a prime candidate for COW. */
2892 if (SvIsCOW(sv))
e424a81e 2893 sv_force_normal_flags(sv, 0);
f9701176
NC
2894#endif
2895
51371543
GS
2896 if (mgs->mgs_flags)
2897 SvFLAGS(sv) |= mgs->mgs_flags;
2898 else
2899 mg_magical(sv);
2b77b520
YST
2900 if (SvGMAGICAL(sv)) {
2901 /* downgrade public flags to private,
2902 and discard any other private flags */
2903
10edeb5d
JH
2904 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2905 if (pubflags) {
2906 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2907 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST
2908 }
2909 }
51371543
GS
2910 }
2911
2912 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2913
2914 /* If we're still on top of the stack, pop us off. (That condition
2915 * will be satisfied if restore_magic was called explicitly, but *not*
2916 * if it's being called via leave_scope.)
2917 * The reason for doing this is that otherwise, things like sv_2cv()
2918 * may leave alloc gunk on the savestack, and some code
2919 * (e.g. sighandler) doesn't expect that...
2920 */
2921 if (PL_savestack_ix == mgs->mgs_ss_ix)
2922 {
2923 I32 popval = SSPOPINT;
c76ac1ee 2924 assert(popval == SAVEt_DESTRUCTOR_X);
51371543
GS
2925 PL_savestack_ix -= 2;
2926 popval = SSPOPINT;
2927 assert(popval == SAVEt_ALLOC);
2928 popval = SSPOPINT;
2929 PL_savestack_ix -= popval;
2930 }
2931
2932}
2933
2934static void
8772537c 2935S_unwind_handler_stack(pTHX_ const void *p)
51371543 2936{
27da23d5 2937 dVAR;
e1ec3a88 2938 const U32 flags = *(const U32*)p;
51371543
GS
2939
2940 if (flags & 1)
2941 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 2942#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 2943 if (flags & 64)
27da23d5 2944 SvREFCNT_dec(PL_sig_sv);
df3728a2 2945#endif
51371543 2946}
1018e26f 2947
66610fdd 2948/*
b3ca2e83
NC
2949=for apidoc magic_sethint
2950
2951Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC
2952C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
2953anything that would need a deep copy. Maybe we should warn if we find a
2954reference.
b3ca2e83
NC
2955
2956=cut
2957*/
2958int
2959Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
2960{
2961 dVAR;
fc92a12d
NC
2962 SV *key = (mg->mg_len == HEf_SVKEY) ? (SV *)mg->mg_ptr
2963 : sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len));
b3ca2e83 2964
e6e3e454
NC
2965 /* mg->mg_obj isn't being used. If needed, it would be possible to store
2966 an alternative leaf in there, with PL_compiling.cop_hints being used if
2967 it's NULL. If needed for threads, the alternative could lock a mutex,
2968 or take other more complex action. */
2969
5b9c0671
NC
2970 /* Something changed in %^H, so it will need to be restored on scope exit.
2971 Doing this here saves a lot of doing it manually in perl code (and
2972 forgetting to do it, and consequent subtle errors. */
2973 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec 2974 PL_compiling.cop_hints_hash
fc92a12d 2975 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash, key, sv);
b3ca2e83
NC
2976 return 0;
2977}
2978
2979/*
2980=for apidoc magic_sethint
2981
c28fe1ec
NC
2982Triggered by a delete from %^H, records the key to
2983C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC
2984
2985=cut
2986*/
2987int
2988Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
2989{
2990 dVAR;
f5a63d97
AL
2991 PERL_UNUSED_ARG(sv);
2992
b3ca2e83
NC
2993 assert(mg->mg_len == HEf_SVKEY);
2994
b3f24c00
MHM
2995 PERL_UNUSED_ARG(sv);
2996
5b9c0671 2997 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC
2998 PL_compiling.cop_hints_hash
2999 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
b3ca2e83
NC
3000 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3001 return 0;
3002}
3003
3004/*
66610fdd
RGS
3005 * Local variables:
3006 * c-indentation-style: bsd
3007 * c-basic-offset: 4
3008 * indent-tabs-mode: t
3009 * End:
3010 *
37442d52
RGS
3011 * ex: set ts=8 sts=4 sw=4 noet:
3012 */