Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* mg.c |
79072805 | 2 | * |
1129b882 NC |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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 | /* | |
4ac71550 TC |
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. | |
14 | * | |
15 | * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"] | |
79072805 LW |
16 | */ |
17 | ||
ccfc67b7 | 18 | /* |
51b56f5c | 19 | =head1 Magic |
166f8a29 DM |
20 | "Magic" is special data attached to SV structures in order to give them |
21 | "magical" properties. When any Perl code tries to read from, or assign to, | |
22 | an SV marked as magical, it calls the 'get' or 'set' function associated | |
154e47c8 | 23 | with that SV's magic. A get is called prior to reading an SV, in order to |
ddfa107c | 24 | give it a chance to update its internal value (get on $. writes the line |
b53c43bf | 25 | number of the last read filehandle into the SV's IV slot), while |
166f8a29 | 26 | set is called after an SV has been written to, in order to allow it to make |
ddfa107c | 27 | use of its changed value (set on $/ copies the SV's new value to the |
166f8a29 DM |
28 | PL_rs global variable). |
29 | ||
30 | Magic is implemented as a linked list of MAGIC structures attached to the | |
154e47c8 | 31 | SV. Each MAGIC struct holds the type of the magic, a pointer to an array |
166f8a29 | 32 | of functions that implement the get(), set(), length() etc functions, |
154e47c8 | 33 | plus space for some flags and pointers. For example, a tied variable has |
166f8a29 DM |
34 | a MAGIC structure that contains a pointer to the object associated with the |
35 | tie. | |
36 | ||
19851e27 KW |
37 | =for apidoc Ayh||MAGIC |
38 | ||
7fefc6c1 KW |
39 | =cut |
40 | ||
ccfc67b7 JH |
41 | */ |
42 | ||
79072805 | 43 | #include "EXTERN.h" |
864dbfa3 | 44 | #define PERL_IN_MG_C |
79072805 | 45 | #include "perl.h" |
b34c1a7e | 46 | #include "feature.h" |
79072805 | 47 | |
5cd24f17 | 48 | #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS) |
b7953727 JH |
49 | # ifdef I_GRP |
50 | # include <grp.h> | |
51 | # endif | |
188ea221 CS |
52 | #endif |
53 | ||
757f63d8 SP |
54 | #if defined(HAS_SETGROUPS) |
55 | # ifndef NGROUPS | |
56 | # define NGROUPS 32 | |
57 | # endif | |
58 | #endif | |
59 | ||
17aa7f3d JH |
60 | #ifdef __hpux |
61 | # include <sys/pstat.h> | |
62 | #endif | |
63 | ||
7636ea95 AB |
64 | #ifdef HAS_PRCTL_SET_NAME |
65 | # include <sys/prctl.h> | |
66 | #endif | |
67 | ||
9cffb111 OS |
68 | #ifdef __Lynx__ |
69 | /* Missing protos on LynxOS */ | |
70 | void setruid(uid_t id); | |
71 | void seteuid(uid_t id); | |
72 | void setrgid(uid_t id); | |
73 | void setegid(uid_t id); | |
74 | #endif | |
75 | ||
c07a80fd | 76 | /* |
4bac9ae4 | 77 | * Pre-magic setup and post-magic takedown. |
c07a80fd | 78 | * Use the "DESTRUCTOR" scope cleanup to reinstate magic. |
79 | */ | |
80 | ||
81 | struct magic_state { | |
82 | SV* mgs_sv; | |
455ece5e | 83 | I32 mgs_ss_ix; |
a623f893 | 84 | U32 mgs_flags; |
150b625d | 85 | bool mgs_bumped; |
c07a80fd | 86 | }; |
455ece5e | 87 | /* MGS is typedef'ed to struct magic_state in perl.h */ |
76e3520e GS |
88 | |
89 | STATIC void | |
1a2b24d8 | 90 | S_save_magic_flags(pTHX_ SSize_t mgs_ix, SV *sv, U32 flags) |
c07a80fd | 91 | { |
455ece5e | 92 | MGS* mgs; |
150b625d | 93 | bool bumped = FALSE; |
7918f24d | 94 | |
ff44333e | 95 | PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS; |
7918f24d | 96 | |
4bac9ae4 CS |
97 | assert(SvMAGICAL(sv)); |
98 | ||
150b625d DM |
99 | /* we shouldn't really be called here with RC==0, but it can sometimes |
100 | * happen via mg_clear() (which also shouldn't be called when RC==0, | |
101 | * but it can happen). Handle this case gracefully(ish) by not RC++ | |
102 | * and thus avoiding the resultant double free */ | |
103 | if (SvREFCNT(sv) > 0) { | |
104 | /* guard against sv getting freed midway through the mg clearing, | |
105 | * by holding a private reference for the duration. */ | |
1604cfb0 MS |
106 | SvREFCNT_inc_simple_void_NN(sv); |
107 | bumped = TRUE; | |
150b625d | 108 | } |
8985fe98 | 109 | |
8772537c | 110 | SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix)); |
455ece5e AD |
111 | |
112 | mgs = SSPTR(mgs_ix, MGS*); | |
c07a80fd | 113 | mgs->mgs_sv = sv; |
a623f893 | 114 | mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv); |
455ece5e | 115 | mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */ |
150b625d | 116 | mgs->mgs_bumped = bumped; |
c07a80fd | 117 | |
ff44333e | 118 | SvFLAGS(sv) &= ~flags; |
3805b5fb | 119 | SvREADONLY_off(sv); |
c07a80fd | 120 | } |
121 | ||
ff44333e FC |
122 | #define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG) |
123 | ||
954c1994 GS |
124 | /* |
125 | =for apidoc mg_magical | |
126 | ||
fbe13c60 | 127 | Turns on the magical status of an SV. See C<L</sv_magic>>. |
954c1994 GS |
128 | |
129 | =cut | |
130 | */ | |
131 | ||
8990e307 | 132 | void |
ddeaf645 | 133 | Perl_mg_magical(SV *sv) |
8990e307 | 134 | { |
e1ec3a88 | 135 | const MAGIC* mg; |
7918f24d | 136 | PERL_ARGS_ASSERT_MG_MAGICAL; |
f9c6fee5 CS |
137 | |
138 | SvMAGICAL_off(sv); | |
218787bd | 139 | if ((mg = SvMAGIC(sv))) { |
1604cfb0 MS |
140 | do { |
141 | const MGVTBL* const vtbl = mg->mg_virtual; | |
142 | if (vtbl) { | |
143 | if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP)) | |
144 | SvGMAGICAL_on(sv); | |
145 | if (vtbl->svt_set) | |
146 | SvSMAGICAL_on(sv); | |
147 | if (vtbl->svt_clear) | |
148 | SvRMAGICAL_on(sv); | |
149 | } | |
150 | } while ((mg = mg->mg_moremagic)); | |
151 | if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG))) | |
152 | SvRMAGICAL_on(sv); | |
8990e307 LW |
153 | } |
154 | } | |
155 | ||
954c1994 GS |
156 | /* |
157 | =for apidoc mg_get | |
158 | ||
4b1e7f06 | 159 | Do magic before a value is retrieved from the SV. The type of SV must |
796b6530 | 160 | be >= C<SVt_PVMG>. See C<L</sv_magic>>. |
954c1994 GS |
161 | |
162 | =cut | |
163 | */ | |
164 | ||
79072805 | 165 | int |
864dbfa3 | 166 | Perl_mg_get(pTHX_ SV *sv) |
79072805 | 167 | { |
1a2b24d8 | 168 | const SSize_t mgs_ix = SSNEW(sizeof(MGS)); |
a9844598 | 169 | bool saved = FALSE; |
f9c6fee5 | 170 | bool have_new = 0; |
b949b68f | 171 | bool taint_only = TRUE; /* the only get method seen is taint */ |
ff76feab | 172 | MAGIC *newmg, *head, *cur, *mg; |
6683b158 | 173 | |
7918f24d NC |
174 | PERL_ARGS_ASSERT_MG_GET; |
175 | ||
407287f9 FC |
176 | if (PL_localizing == 1 && sv == DEFSV) return 0; |
177 | ||
ff76feab AMS |
178 | /* We must call svt_get(sv, mg) for each valid entry in the linked |
179 | list of magic. svt_get() may delete the current entry, add new | |
180 | magic to the head of the list, or upgrade the SV. AMS 20010810 */ | |
181 | ||
182 | newmg = cur = head = mg = SvMAGIC(sv); | |
183 | while (mg) { | |
1604cfb0 MS |
184 | const MGVTBL * const vtbl = mg->mg_virtual; |
185 | MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */ | |
ff76feab | 186 | |
1604cfb0 | 187 | if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) { |
a9844598 | 188 | |
1604cfb0 MS |
189 | /* taint's mg get is so dumb it doesn't need flag saving */ |
190 | if (mg->mg_type != PERL_MAGIC_taint) { | |
b949b68f DM |
191 | taint_only = FALSE; |
192 | if (!saved) { | |
193 | save_magic(mgs_ix, sv); | |
194 | saved = TRUE; | |
195 | } | |
196 | } | |
a9844598 | 197 | |
1604cfb0 MS |
198 | vtbl->svt_get(aTHX_ sv, mg); |
199 | ||
200 | /* guard against magic having been deleted - eg FETCH calling | |
201 | * untie */ | |
202 | if (!SvMAGIC(sv)) { | |
203 | /* recalculate flags */ | |
204 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
205 | break; | |
206 | } | |
207 | ||
208 | /* recalculate flags if this entry was deleted. */ | |
209 | if (mg->mg_flags & MGf_GSKIP) | |
210 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= | |
211 | ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
212 | } | |
213 | else if (vtbl == &PL_vtbl_utf8) { | |
214 | /* get-magic can reallocate the PV, unless there's only taint | |
b949b68f DM |
215 | * magic */ |
216 | if (taint_only) { | |
217 | MAGIC *mg2; | |
218 | for (mg2 = nextmg; mg2; mg2 = mg2->mg_moremagic) { | |
219 | if ( mg2->mg_type != PERL_MAGIC_taint | |
220 | && !(mg2->mg_flags & MGf_GSKIP) | |
221 | && mg2->mg_virtual | |
222 | && mg2->mg_virtual->svt_get | |
223 | ) { | |
224 | taint_only = FALSE; | |
225 | break; | |
226 | } | |
227 | } | |
228 | } | |
229 | if (!taint_only) | |
230 | magic_setutf8(sv, mg); | |
1604cfb0 MS |
231 | } |
232 | ||
233 | mg = nextmg; | |
234 | ||
235 | if (have_new) { | |
236 | /* Have we finished with the new entries we saw? Start again | |
237 | where we left off (unless there are more new entries). */ | |
238 | if (mg == head) { | |
239 | have_new = 0; | |
240 | mg = cur; | |
241 | head = newmg; | |
242 | } | |
243 | } | |
244 | ||
245 | /* Were any new entries added? */ | |
246 | if (!have_new && (newmg = SvMAGIC(sv)) != head) { | |
247 | have_new = 1; | |
248 | cur = mg; | |
249 | mg = newmg; | |
250 | /* recalculate flags */ | |
251 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
252 | } | |
79072805 | 253 | } |
463ee0b2 | 254 | |
a9844598 | 255 | if (saved) |
1604cfb0 | 256 | restore_magic(INT2PTR(void *, (IV)mgs_ix)); |
a9844598 | 257 | |
79072805 LW |
258 | return 0; |
259 | } | |
260 | ||
954c1994 GS |
261 | /* |
262 | =for apidoc mg_set | |
263 | ||
fbe13c60 | 264 | Do magic after a value is assigned to the SV. See C<L</sv_magic>>. |
954c1994 GS |
265 | |
266 | =cut | |
267 | */ | |
268 | ||
79072805 | 269 | int |
864dbfa3 | 270 | Perl_mg_set(pTHX_ SV *sv) |
79072805 | 271 | { |
1a2b24d8 | 272 | const SSize_t mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 273 | MAGIC* mg; |
463ee0b2 LW |
274 | MAGIC* nextmg; |
275 | ||
7918f24d NC |
276 | PERL_ARGS_ASSERT_MG_SET; |
277 | ||
b5ed8c44 FC |
278 | if (PL_localizing == 2 && sv == DEFSV) return 0; |
279 | ||
ff44333e | 280 | save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */ |
463ee0b2 LW |
281 | |
282 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { | |
e1ec3a88 | 283 | const MGVTBL* vtbl = mg->mg_virtual; |
1604cfb0 MS |
284 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
285 | if (mg->mg_flags & MGf_GSKIP) { | |
286 | mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */ | |
287 | (SSPTR(mgs_ix, MGS*))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
288 | } | |
289 | if (PL_localizing == 2 | |
290 | && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) | |
291 | continue; | |
292 | if (vtbl && vtbl->svt_set) | |
293 | vtbl->svt_set(aTHX_ sv, mg); | |
79072805 | 294 | } |
463ee0b2 | 295 | |
8772537c | 296 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
297 | return 0; |
298 | } | |
299 | ||
8fb26106 | 300 | I32 |
864dbfa3 | 301 | Perl_mg_size(pTHX_ SV *sv) |
93965878 NIS |
302 | { |
303 | MAGIC* mg; | |
ac27b0f5 | 304 | |
7918f24d NC |
305 | PERL_ARGS_ASSERT_MG_SIZE; |
306 | ||
93965878 | 307 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 308 | const MGVTBL* const vtbl = mg->mg_virtual; |
1604cfb0 | 309 | if (vtbl && vtbl->svt_len) { |
1a2b24d8 | 310 | const SSize_t mgs_ix = SSNEW(sizeof(MGS)); |
35a4481c | 311 | I32 len; |
1604cfb0 MS |
312 | save_magic(mgs_ix, sv); |
313 | /* omit MGf_GSKIP -- not changed here */ | |
314 | len = vtbl->svt_len(aTHX_ sv, mg); | |
315 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); | |
316 | return len; | |
317 | } | |
93965878 NIS |
318 | } |
319 | ||
320 | switch(SvTYPE(sv)) { | |
1604cfb0 MS |
321 | case SVt_PVAV: |
322 | return AvFILLp((const AV *) sv); /* Fallback to non-tied array */ | |
323 | case SVt_PVHV: | |
324 | /* FIXME */ | |
325 | default: | |
326 | Perl_croak(aTHX_ "Size magic not implemented"); | |
81d52ecd | 327 | |
93965878 | 328 | } |
a25b5927 | 329 | NOT_REACHED; /* NOTREACHED */ |
93965878 NIS |
330 | } |
331 | ||
954c1994 GS |
332 | /* |
333 | =for apidoc mg_clear | |
334 | ||
fbe13c60 | 335 | Clear something magical that the SV represents. See C<L</sv_magic>>. |
954c1994 GS |
336 | |
337 | =cut | |
338 | */ | |
339 | ||
79072805 | 340 | int |
864dbfa3 | 341 | Perl_mg_clear(pTHX_ SV *sv) |
79072805 | 342 | { |
1a2b24d8 | 343 | const SSize_t mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 344 | MAGIC* mg; |
8ac77ac9 | 345 | MAGIC *nextmg; |
463ee0b2 | 346 | |
7918f24d NC |
347 | PERL_ARGS_ASSERT_MG_CLEAR; |
348 | ||
455ece5e | 349 | save_magic(mgs_ix, sv); |
463ee0b2 | 350 | |
8ac77ac9 | 351 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { |
35a4481c | 352 | const MGVTBL* const vtbl = mg->mg_virtual; |
1604cfb0 | 353 | /* omit GSKIP -- never set here */ |
727405f8 | 354 | |
1604cfb0 | 355 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
8ac77ac9 | 356 | |
1604cfb0 MS |
357 | if (vtbl && vtbl->svt_clear) |
358 | vtbl->svt_clear(aTHX_ sv, mg); | |
79072805 | 359 | } |
463ee0b2 | 360 | |
8772537c | 361 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
362 | return 0; |
363 | } | |
364 | ||
ed624ca8 | 365 | static MAGIC* |
ddeaf645 | 366 | S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags) |
39de7f53 | 367 | { |
39de7f53 FR |
368 | assert(flags <= 1); |
369 | ||
370 | if (sv) { | |
1604cfb0 | 371 | MAGIC *mg; |
39de7f53 | 372 | |
1604cfb0 MS |
373 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
374 | if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) { | |
375 | return mg; | |
376 | } | |
377 | } | |
39de7f53 FR |
378 | } |
379 | ||
380 | return NULL; | |
381 | } | |
382 | ||
954c1994 GS |
383 | /* |
384 | =for apidoc mg_find | |
385 | ||
796b6530 | 386 | Finds the magic pointer for C<type> matching the SV. See C<L</sv_magic>>. |
954c1994 GS |
387 | |
388 | =cut | |
389 | */ | |
390 | ||
93a17b20 | 391 | MAGIC* |
ddeaf645 | 392 | Perl_mg_find(const SV *sv, int type) |
93a17b20 | 393 | { |
ddeaf645 | 394 | return S_mg_findext_flags(sv, type, NULL, 0); |
39de7f53 FR |
395 | } |
396 | ||
397 | /* | |
398 | =for apidoc mg_findext | |
399 | ||
400 | Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See | |
fbe13c60 | 401 | C<L</sv_magicext>>. |
39de7f53 FR |
402 | |
403 | =cut | |
404 | */ | |
405 | ||
406 | MAGIC* | |
ddeaf645 | 407 | Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl) |
39de7f53 | 408 | { |
ddeaf645 | 409 | return S_mg_findext_flags(sv, type, vtbl, 1); |
93a17b20 LW |
410 | } |
411 | ||
96c2a8ff FC |
412 | MAGIC * |
413 | Perl_mg_find_mglob(pTHX_ SV *sv) | |
414 | { | |
415 | PERL_ARGS_ASSERT_MG_FIND_MGLOB; | |
416 | if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') { | |
417 | /* This sv is only a delegate. //g magic must be attached to | |
418 | its target. */ | |
419 | vivify_defelem(sv); | |
420 | sv = LvTARG(sv); | |
421 | } | |
422 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) | |
ddeaf645 | 423 | return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0); |
96c2a8ff FC |
424 | return NULL; |
425 | } | |
426 | ||
954c1994 GS |
427 | /* |
428 | =for apidoc mg_copy | |
429 | ||
fbe13c60 | 430 | Copies the magic from one SV to another. See C<L</sv_magic>>. |
954c1994 GS |
431 | |
432 | =cut | |
433 | */ | |
434 | ||
79072805 | 435 | int |
864dbfa3 | 436 | Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen) |
79072805 | 437 | { |
463ee0b2 | 438 | int count = 0; |
79072805 | 439 | MAGIC* mg; |
7918f24d NC |
440 | |
441 | PERL_ARGS_ASSERT_MG_COPY; | |
442 | ||
463ee0b2 | 443 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 444 | const MGVTBL* const vtbl = mg->mg_virtual; |
1604cfb0 MS |
445 | if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){ |
446 | count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen); | |
447 | } | |
448 | else { | |
449 | const char type = mg->mg_type; | |
450 | if (isUPPER(type) && type != PERL_MAGIC_uvar) { | |
451 | sv_magic(nsv, | |
452 | (type == PERL_MAGIC_tied) | |
453 | ? SvTIED_obj(sv, mg) | |
27deb0cf | 454 | : mg->mg_obj, |
1604cfb0 MS |
455 | toLOWER(type), key, klen); |
456 | count++; | |
457 | } | |
458 | } | |
79072805 | 459 | } |
463ee0b2 | 460 | return count; |
79072805 LW |
461 | } |
462 | ||
954c1994 | 463 | /* |
0cbee0a4 DM |
464 | =for apidoc mg_localize |
465 | ||
9711599e | 466 | Copy some of the magic from an existing SV to new localized version of that |
dfcfced8 KW |
467 | SV. Container magic (I<e.g.>, C<%ENV>, C<$1>, C<tie>) |
468 | gets copied, value magic doesn't (I<e.g.>, | |
796b6530 | 469 | C<taint>, C<pos>). |
9711599e | 470 | |
796b6530 | 471 | If C<setmagic> is false then no set magic will be called on the new (empty) SV. |
61b16eb9 | 472 | This typically means that assignment will soon follow (e.g. S<C<'local $x = $y'>>), |
9711599e | 473 | and that will handle the magic. |
0cbee0a4 DM |
474 | |
475 | =cut | |
476 | */ | |
477 | ||
478 | void | |
af7df257 | 479 | Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic) |
0cbee0a4 DM |
480 | { |
481 | MAGIC *mg; | |
7918f24d NC |
482 | |
483 | PERL_ARGS_ASSERT_MG_LOCALIZE; | |
484 | ||
658a9f31 | 485 | if (nsv == DEFSV) |
1604cfb0 | 486 | return; |
658a9f31 | 487 | |
0cbee0a4 | 488 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
1604cfb0 MS |
489 | const MGVTBL* const vtbl = mg->mg_virtual; |
490 | if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) | |
491 | continue; | |
492 | ||
493 | if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local) | |
494 | (void)vtbl->svt_local(aTHX_ nsv, mg); | |
495 | else | |
496 | sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl, | |
497 | mg->mg_ptr, mg->mg_len); | |
a5063e7c | 498 | |
1604cfb0 MS |
499 | /* container types should remain read-only across localization */ |
500 | SvFLAGS(nsv) |= SvREADONLY(sv); | |
0cbee0a4 DM |
501 | } |
502 | ||
503 | if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) { | |
1604cfb0 MS |
504 | SvFLAGS(nsv) |= SvMAGICAL(sv); |
505 | if (setmagic) { | |
506 | PL_localizing = 1; | |
507 | SvSETMAGIC(nsv); | |
508 | PL_localizing = 0; | |
509 | } | |
0cbee0a4 DM |
510 | } |
511 | } | |
512 | ||
d9088386 Z |
513 | #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg) |
514 | static void | |
515 | S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg) | |
516 | { | |
517 | const MGVTBL* const vtbl = mg->mg_virtual; | |
518 | if (vtbl && vtbl->svt_free) | |
1604cfb0 | 519 | vtbl->svt_free(aTHX_ sv, mg); |
44955e7d | 520 | |
02a48966 DM |
521 | if (mg->mg_len > 0) |
522 | Safefree(mg->mg_ptr); | |
523 | else if (mg->mg_len == HEf_SVKEY) | |
524 | SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr)); | |
44955e7d | 525 | |
d9088386 | 526 | if (mg->mg_flags & MGf_REFCOUNTED) |
1604cfb0 | 527 | SvREFCNT_dec(mg->mg_obj); |
d9088386 Z |
528 | Safefree(mg); |
529 | } | |
530 | ||
0cbee0a4 | 531 | /* |
954c1994 GS |
532 | =for apidoc mg_free |
533 | ||
fbe13c60 | 534 | Free any magic storage used by the SV. See C<L</sv_magic>>. |
954c1994 GS |
535 | |
536 | =cut | |
537 | */ | |
538 | ||
79072805 | 539 | int |
864dbfa3 | 540 | Perl_mg_free(pTHX_ SV *sv) |
79072805 LW |
541 | { |
542 | MAGIC* mg; | |
543 | MAGIC* moremagic; | |
7918f24d NC |
544 | |
545 | PERL_ARGS_ASSERT_MG_FREE; | |
546 | ||
79072805 | 547 | for (mg = SvMAGIC(sv); mg; mg = moremagic) { |
1604cfb0 MS |
548 | moremagic = mg->mg_moremagic; |
549 | mg_free_struct(sv, mg); | |
550 | SvMAGIC_set(sv, moremagic); | |
79072805 | 551 | } |
b162af07 | 552 | SvMAGIC_set(sv, NULL); |
68f8932e | 553 | SvMAGICAL_off(sv); |
79072805 LW |
554 | return 0; |
555 | } | |
556 | ||
d9088386 | 557 | /* |
44170c9a | 558 | =for apidoc mg_free_type |
d9088386 | 559 | |
2d7f6611 | 560 | Remove any magic of type C<how> from the SV C<sv>. See L</sv_magic>. |
d9088386 Z |
561 | |
562 | =cut | |
563 | */ | |
564 | ||
565 | void | |
566 | Perl_mg_free_type(pTHX_ SV *sv, int how) | |
567 | { | |
568 | MAGIC *mg, *prevmg, *moremg; | |
569 | PERL_ARGS_ASSERT_MG_FREE_TYPE; | |
570 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
1604cfb0 MS |
571 | moremg = mg->mg_moremagic; |
572 | if (mg->mg_type == how) { | |
19742f39 | 573 | MAGIC *newhead; |
1604cfb0 MS |
574 | /* temporarily move to the head of the magic chain, in case |
575 | custom free code relies on this historical aspect of mg_free */ | |
576 | if (prevmg) { | |
577 | prevmg->mg_moremagic = moremg; | |
578 | mg->mg_moremagic = SvMAGIC(sv); | |
579 | SvMAGIC_set(sv, mg); | |
580 | } | |
581 | newhead = mg->mg_moremagic; | |
582 | mg_free_struct(sv, mg); | |
583 | SvMAGIC_set(sv, newhead); | |
584 | mg = prevmg; | |
585 | } | |
d9088386 Z |
586 | } |
587 | mg_magical(sv); | |
588 | } | |
589 | ||
e0d4aead TC |
590 | /* |
591 | =for apidoc mg_freeext | |
592 | ||
593 | Remove any magic of type C<how> using virtual table C<vtbl> from the | |
594 | SV C<sv>. See L</sv_magic>. | |
595 | ||
596 | C<mg_freeext(sv, how, NULL)> is equivalent to C<mg_free_type(sv, how)>. | |
597 | ||
598 | =cut | |
599 | */ | |
600 | ||
601 | void | |
602 | Perl_mg_freeext(pTHX_ SV *sv, int how, const MGVTBL *vtbl) | |
603 | { | |
604 | MAGIC *mg, *prevmg, *moremg; | |
605 | PERL_ARGS_ASSERT_MG_FREEEXT; | |
606 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
1604cfb0 MS |
607 | MAGIC *newhead; |
608 | moremg = mg->mg_moremagic; | |
609 | if (mg->mg_type == how && (vtbl == NULL || mg->mg_virtual == vtbl)) { | |
610 | /* temporarily move to the head of the magic chain, in case | |
611 | custom free code relies on this historical aspect of mg_free */ | |
612 | if (prevmg) { | |
613 | prevmg->mg_moremagic = moremg; | |
614 | mg->mg_moremagic = SvMAGIC(sv); | |
615 | SvMAGIC_set(sv, mg); | |
616 | } | |
617 | newhead = mg->mg_moremagic; | |
618 | mg_free_struct(sv, mg); | |
619 | SvMAGIC_set(sv, newhead); | |
620 | mg = prevmg; | |
621 | } | |
e0d4aead TC |
622 | } |
623 | mg_magical(sv); | |
624 | } | |
625 | ||
79072805 | 626 | #include <signal.h> |
79072805 | 627 | |
942e002e | 628 | U32 |
864dbfa3 | 629 | Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 630 | { |
8772537c | 631 | PERL_UNUSED_ARG(sv); |
6cef1e77 | 632 | |
7918f24d NC |
633 | PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT; |
634 | ||
0bd48802 | 635 | if (PL_curpm) { |
27deb0cf | 636 | REGEXP * const rx = PM_GETRE(PL_curpm); |
1604cfb0 | 637 | if (rx) { |
fa531f32 DM |
638 | const SSize_t n = (SSize_t)mg->mg_obj; |
639 | if (n == '+') { /* @+ */ | |
1604cfb0 | 640 | /* return the number possible */ |
fe5492d9 | 641 | return RX_LOGICAL_NPARENS(rx); |
27deb0cf | 642 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
1604cfb0 | 643 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 | 644 | |
1604cfb0 | 645 | /* return the last filled */ |
3f11a285 | 646 | while ( paren >= 0 && !RX_OFFS_VALID(rx,paren) ) |
1604cfb0 | 647 | paren--; |
fe5492d9 YO |
648 | if (paren && RX_PARNO_TO_LOGICAL(rx)) |
649 | paren = RX_PARNO_TO_LOGICAL(rx)[paren]; | |
fa531f32 | 650 | if (n == '-') { |
27deb0cf YO |
651 | /* @- */ |
652 | return (U32)paren; | |
653 | } else { | |
654 | /* @^CAPTURE @{^CAPTURE} */ | |
655 | return paren >= 0 ? (U32)(paren-1) : (U32)-1; | |
656 | } | |
657 | } | |
1604cfb0 | 658 | } |
8f580fb8 | 659 | } |
ac27b0f5 | 660 | |
942e002e | 661 | return (U32)-1; |
6cef1e77 IZ |
662 | } |
663 | ||
6502e081 DM |
664 | /* @-, @+ */ |
665 | ||
6cef1e77 | 666 | int |
864dbfa3 | 667 | Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 668 | { |
7918f24d | 669 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET; |
fe5492d9 YO |
670 | REGEXP * const rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL; |
671 | ||
672 | if (rx) { | |
673 | const SSize_t n = (SSize_t)mg->mg_obj; | |
674 | /* @{^CAPTURE} does not contain $&, so we need to increment by 1 */ | |
675 | const I32 paren = mg->mg_len | |
676 | + (n == '\003' ? 1 : 0); | |
677 | SSize_t s; | |
678 | SSize_t t; | |
679 | if (paren < 0) | |
680 | return 0; | |
681 | if (n != '+' && n != '-') { | |
682 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
683 | return 0; | |
684 | } | |
685 | if (paren <= (I32)RX_LOGICAL_NPARENS(rx)) { | |
686 | I32 true_paren = RX_LOGICAL_TO_PARNO(rx) | |
687 | ? RX_LOGICAL_TO_PARNO(rx)[paren] | |
688 | : paren; | |
689 | do { | |
690 | if (((s = RX_OFFS_START(rx,true_paren)) != -1) && | |
691 | ((t = RX_OFFS_END(rx,true_paren)) != -1)) | |
1604cfb0 MS |
692 | { |
693 | SSize_t i; | |
27deb0cf | 694 | |
fa531f32 | 695 | if (n == '+') /* @+ */ |
1604cfb0 | 696 | i = t; |
fa531f32 | 697 | else if (n == '-') /* @- */ |
1604cfb0 | 698 | i = s; |
0bd48802 | 699 | |
1604cfb0 MS |
700 | if (RX_MATCH_UTF8(rx)) { |
701 | const char * const b = RX_SUBBEG(rx); | |
702 | if (b) | |
703 | i = RX_SUBCOFFSET(rx) + | |
6502e081 DM |
704 | utf8_length((U8*)b, |
705 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
1604cfb0 | 706 | } |
727405f8 | 707 | |
1604cfb0 MS |
708 | sv_setuv(sv, i); |
709 | return 0; | |
710 | } | |
fe5492d9 YO |
711 | if (RX_PARNO_TO_LOGICAL_NEXT(rx)) |
712 | true_paren = RX_PARNO_TO_LOGICAL_NEXT(rx)[true_paren]; | |
713 | else | |
714 | break; | |
715 | } while (true_paren); | |
1604cfb0 | 716 | } |
6cef1e77 | 717 | } |
3773545d | 718 | sv_set_undef(sv); |
6cef1e77 IZ |
719 | return 0; |
720 | } | |
721 | ||
6502e081 DM |
722 | /* @-, @+ */ |
723 | ||
e4b89193 | 724 | int |
a29d06ed MG |
725 | Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg) |
726 | { | |
7918f24d | 727 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET; |
dc3bf405 | 728 | PERL_UNUSED_CONTEXT; |
d4c19fe8 AL |
729 | PERL_UNUSED_ARG(sv); |
730 | PERL_UNUSED_ARG(mg); | |
cb077ed2 | 731 | Perl_croak_no_modify(); |
0dbb1585 | 732 | NORETURN_FUNCTION_END; |
a29d06ed MG |
733 | } |
734 | ||
34e6ab8f KW |
735 | #define SvRTRIM(sv) STMT_START { \ |
736 | SV * sv_ = sv; \ | |
737 | if (SvPOK(sv_)) { \ | |
738 | STRLEN len = SvCUR(sv_); \ | |
739 | char * const p = SvPVX(sv_); \ | |
740 | while (len > 0 && isSPACE(p[len-1])) \ | |
741 | --len; \ | |
742 | SvCUR_set(sv_, len); \ | |
743 | p[len] = '\0'; \ | |
744 | } \ | |
ad3296c6 SH |
745 | } STMT_END |
746 | ||
8b850bd5 NC |
747 | void |
748 | Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv) | |
749 | { | |
7918f24d NC |
750 | PERL_ARGS_ASSERT_EMULATE_COP_IO; |
751 | ||
8b850bd5 | 752 | if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT))) |
1604cfb0 | 753 | sv_set_undef(sv); |
8b850bd5 | 754 | else { |
b2aed775 | 755 | SvPVCLEAR(sv); |
1604cfb0 MS |
756 | SvUTF8_off(sv); |
757 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
758 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); | |
759 | assert(value); | |
760 | sv_catsv(sv, value); | |
761 | } | |
762 | sv_catpvs(sv, "\0"); | |
763 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
764 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); | |
765 | assert(value); | |
766 | sv_catsv(sv, value); | |
767 | } | |
8b850bd5 NC |
768 | } |
769 | } | |
770 | ||
d9fe7d23 KW |
771 | STATIC void |
772 | S_fixup_errno_string(pTHX_ SV* sv) | |
773 | { | |
774 | /* Do what is necessary to fixup the non-empty string in 'sv' for return to | |
775 | * Perl space. */ | |
776 | ||
777 | PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING; | |
778 | ||
779 | assert(SvOK(sv)); | |
b35e4f8b KW |
780 | |
781 | if(strEQ(SvPVX(sv), "")) { | |
1604cfb0 | 782 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); |
b35e4f8b | 783 | } |
d9fe7d23 KW |
784 | } |
785 | ||
658db622 | 786 | /* |
3f620621 | 787 | =for apidoc_section $errno |
44170c9a | 788 | =for apidoc sv_string_from_errnum |
658db622 Z |
789 | |
790 | Generates the message string describing an OS error and returns it as | |
791 | an SV. C<errnum> must be a value that C<errno> could take, identifying | |
792 | the type of error. | |
793 | ||
794 | If C<tgtsv> is non-null then the string will be written into that SV | |
795 | (overwriting existing content) and it will be returned. If C<tgtsv> | |
796 | is a null pointer then the string will be written into a new mortal SV | |
797 | which will be returned. | |
798 | ||
799 | The message will be taken from whatever locale would be used by C<$!>, | |
800 | and will be encoded in the SV in whatever manner would be used by C<$!>. | |
801 | The details of this process are subject to future change. Currently, | |
802 | the message is taken from the C locale by default (usually producing an | |
803 | English message), and from the currently selected locale when in the scope | |
804 | of the C<use locale> pragma. A heuristic attempt is made to decode the | |
805 | message from the locale's character encoding, but it will only be decoded | |
806 | as either UTF-8 or ISO-8859-1. It is always correctly decoded in a UTF-8 | |
807 | locale, usually in an ISO-8859-1 locale, and never in any other locale. | |
808 | ||
809 | The SV is always returned containing an actual string, and with no other | |
810 | OK bits set. Unlike C<$!>, a message is even yielded for C<errnum> zero | |
811 | (meaning success), and if no useful message is available then a useless | |
812 | string (currently empty) is returned. | |
813 | ||
814 | =cut | |
815 | */ | |
816 | ||
817 | SV * | |
818 | Perl_sv_string_from_errnum(pTHX_ int errnum, SV *tgtsv) | |
819 | { | |
820 | char const *errstr; | |
c728a1a6 KW |
821 | utf8ness_t utf8ness; |
822 | ||
658db622 | 823 | if(!tgtsv) |
7ea8b04b | 824 | tgtsv = newSV_type_mortal(SVt_PV); |
c728a1a6 | 825 | errstr = my_strerror(errnum, &utf8ness); |
658db622 | 826 | if(errstr) { |
1604cfb0 | 827 | sv_setpv(tgtsv, errstr); |
c728a1a6 KW |
828 | if (utf8ness == UTF8NESS_YES) { |
829 | SvUTF8_on(tgtsv); | |
830 | } | |
1604cfb0 | 831 | fixup_errno_string(tgtsv); |
658db622 | 832 | } else { |
1604cfb0 | 833 | SvPVCLEAR(tgtsv); |
658db622 Z |
834 | } |
835 | return tgtsv; | |
836 | } | |
837 | ||
25bbd826 CB |
838 | #ifdef VMS |
839 | #include <descrip.h> | |
840 | #include <starlet.h> | |
841 | #endif | |
842 | ||
79072805 | 843 | int |
864dbfa3 | 844 | Perl_magic_get(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 845 | { |
eb578fdb KW |
846 | I32 paren; |
847 | const char *s = NULL; | |
848 | REGEXP *rx; | |
e91d8259 | 849 | char nextchar; |
79072805 | 850 | |
7918f24d NC |
851 | PERL_ARGS_ASSERT_MAGIC_GET; |
852 | ||
12865d70 KW |
853 | const char * const remaining = (mg->mg_ptr) |
854 | ? mg->mg_ptr + 1 | |
855 | : NULL; | |
856 | ||
e91d8259 | 857 | if (!mg->mg_ptr) { |
e91d8259 | 858 | paren = mg->mg_len; |
e91d8259 | 859 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
a6d0b1b5 | 860 | do_numbuf_fetch: |
e91d8259 | 861 | CALLREG_NUMBUF_FETCH(rx,paren,sv); |
e91d8259 | 862 | } |
e03e82a0 DM |
863 | else |
864 | goto set_undef; | |
e91d8259 NC |
865 | return 0; |
866 | } | |
867 | ||
868 | nextchar = *remaining; | |
79072805 | 869 | switch (*mg->mg_ptr) { |
748a9306 | 870 | case '\001': /* ^A */ |
1604cfb0 MS |
871 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
872 | else | |
e03e82a0 | 873 | sv_set_undef(sv); |
1604cfb0 MS |
874 | if (SvTAINTED(PL_bodytarget)) |
875 | SvTAINTED_on(sv); | |
876 | break; | |
e5218da5 | 877 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
1604cfb0 MS |
878 | if (nextchar == '\0') { |
879 | sv_setiv(sv, (IV)PL_minus_c); | |
880 | } | |
881 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { | |
882 | sv_setiv(sv, (IV)STATUS_NATIVE); | |
e5218da5 | 883 | } |
1604cfb0 | 884 | break; |
49460fe6 | 885 | |
79072805 | 886 | case '\004': /* ^D */ |
1604cfb0 MS |
887 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
888 | break; | |
28f23441 | 889 | case '\005': /* ^E */ |
1604cfb0 | 890 | if (nextchar != '\0') { |
6c6eab55 | 891 | if (strEQ(remaining, "NCODING")) |
3773545d | 892 | sv_set_undef(sv); |
4f4ff3a7 | 893 | break; |
6c6eab55 | 894 | } |
4f4ff3a7 KW |
895 | |
896 | #if defined(VMS) || defined(OS2) || defined(WIN32) | |
897 | # if defined(VMS) | |
2a99ff86 KW |
898 | { |
899 | char msg[255]; | |
900 | $DESCRIPTOR(msgdsc,msg); | |
901 | sv_setnv(sv,(NV) vaxc$errno); | |
902 | if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) | |
903 | sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); | |
904 | else | |
b2aed775 | 905 | SvPVCLEAR(sv); |
2a99ff86 | 906 | } |
4b645107 | 907 | #elif defined(OS2) |
2a99ff86 KW |
908 | if (!(_emx_env & 0x200)) { /* Under DOS */ |
909 | sv_setnv(sv, (NV)errno); | |
c728a1a6 KW |
910 | if (errno) { |
911 | utf8ness_t utf8ness; | |
912 | const char * errstr = my_strerror(errnum, &utf8ness); | |
913 | ||
914 | sv_setpv(sv, errstr); | |
915 | ||
916 | if (utf8ness == UTF8NESS_YES) { | |
917 | SvUTF8_on(sv); | |
918 | } | |
919 | } | |
920 | else { | |
921 | SvPVCLEAR(sv); | |
922 | } | |
2a99ff86 KW |
923 | } else { |
924 | if (errno != errno_isOS2) { | |
925 | const int tmp = _syserrno(); | |
926 | if (tmp) /* 2nd call to _syserrno() makes it 0 */ | |
927 | Perl_rc = tmp; | |
928 | } | |
929 | sv_setnv(sv, (NV)Perl_rc); | |
930 | sv_setpv(sv, os2error(Perl_rc)); | |
931 | } | |
1534c6f5 | 932 | if (SvOK(sv) && strNE(SvPVX(sv), "")) { |
99461a73 KW |
933 | fixup_errno_string(sv); |
934 | } | |
4f4ff3a7 | 935 | # elif defined(WIN32) |
2a99ff86 KW |
936 | { |
937 | const DWORD dwErr = GetLastError(); | |
938 | sv_setnv(sv, (NV)dwErr); | |
939 | if (dwErr) { | |
940 | PerlProc_GetOSError(sv, dwErr); | |
2efab60d | 941 | fixup_errno_string(sv); |
c728a1a6 KW |
942 | |
943 | # ifdef USE_LOCALE | |
944 | if ( IN_LOCALE | |
945 | && get_win32_message_utf8ness(SvPV_nomg_const_nolen(sv))) | |
946 | { | |
947 | SvUTF8_on(sv); | |
948 | } | |
949 | # endif | |
2a99ff86 KW |
950 | } |
951 | else | |
b2aed775 | 952 | SvPVCLEAR(sv); |
2a99ff86 KW |
953 | SetLastError(dwErr); |
954 | } | |
4f4ff3a7 KW |
955 | # else |
956 | # error Missing code for platform | |
957 | # endif | |
2a99ff86 KW |
958 | SvRTRIM(sv); |
959 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1604cfb0 | 960 | break; |
4f4ff3a7 KW |
961 | #endif /* End of platforms with special handling for $^E; others just fall |
962 | through to $! */ | |
2165bd23 | 963 | /* FALLTHROUGH */ |
46f3e16c KW |
964 | |
965 | case '!': | |
1604cfb0 | 966 | { |
5f1b979d | 967 | dSAVE_ERRNO; |
46f3e16c | 968 | #ifdef VMS |
5f1b979d | 969 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno)); |
46f3e16c | 970 | #else |
5f1b979d | 971 | sv_setnv(sv, (NV)errno); |
46f3e16c KW |
972 | #endif |
973 | #ifdef OS2 | |
5f1b979d KW |
974 | if (errno == errno_isOS2 || errno == errno_isOS2_set) |
975 | sv_setpv(sv, os2error(Perl_rc)); | |
976 | else | |
46f3e16c | 977 | #endif |
5f1b979d | 978 | if (! errno) { |
b2aed775 | 979 | SvPVCLEAR(sv); |
46f3e16c | 980 | } |
5f1b979d | 981 | else { |
658db622 Z |
982 | sv_string_from_errnum(errno, sv); |
983 | /* If no useful string is available, don't | |
984 | * claim to have a string part. The SvNOK_on() | |
5f1b979d | 985 | * below will cause just the number part to be valid */ |
658db622 Z |
986 | if (!SvCUR(sv)) |
987 | SvPOK_off(sv); | |
5f1b979d KW |
988 | } |
989 | RESTORE_ERRNO; | |
1604cfb0 | 990 | } |
46f3e16c | 991 | |
1604cfb0 MS |
992 | SvRTRIM(sv); |
993 | SvNOK_on(sv); /* what a wonderful hack! */ | |
994 | break; | |
46f3e16c | 995 | |
79072805 | 996 | case '\006': /* ^F */ |
9f601cf3 TC |
997 | if (nextchar == '\0') { |
998 | sv_setiv(sv, (IV)PL_maxsysfd); | |
999 | } | |
1604cfb0 | 1000 | break; |
9ebf26ad | 1001 | case '\007': /* ^GLOBAL_PHASE */ |
1604cfb0 MS |
1002 | if (strEQ(remaining, "LOBAL_PHASE")) { |
1003 | sv_setpvn(sv, PL_phase_names[PL_phase], | |
1004 | strlen(PL_phase_names[PL_phase])); | |
1005 | } | |
1006 | break; | |
a0d0e21e | 1007 | case '\010': /* ^H */ |
1604cfb0 MS |
1008 | sv_setuv(sv, PL_hints); |
1009 | break; | |
9d116dd7 | 1010 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
1604cfb0 MS |
1011 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
1012 | break; | |
8561ea1d | 1013 | case '\014': /* ^LAST_FH */ |
1604cfb0 MS |
1014 | if (strEQ(remaining, "AST_FH")) { |
1015 | if (PL_last_in_gv && (SV*)PL_last_in_gv != &PL_sv_undef) { | |
1016 | assert(isGV_with_GP(PL_last_in_gv)); | |
972c8f20 | 1017 | sv_setrv_inc(sv, MUTABLE_SV(PL_last_in_gv)); |
1604cfb0 MS |
1018 | sv_rvweaken(sv); |
1019 | } | |
1020 | else | |
3773545d | 1021 | sv_set_undef(sv); |
1604cfb0 MS |
1022 | } |
1023 | break; | |
ac27b0f5 | 1024 | case '\017': /* ^O & ^OPEN */ |
1604cfb0 MS |
1025 | if (nextchar == '\0') { |
1026 | sv_setpv(sv, PL_osname); | |
1027 | SvTAINTED_off(sv); | |
1028 | } | |
1029 | else if (strEQ(remaining, "PEN")) { | |
1030 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); | |
1031 | } | |
1032 | break; | |
9ebf26ad | 1033 | case '\020': |
a6d0b1b5 | 1034 | sv_setiv(sv, (IV)PL_perldb); |
1604cfb0 | 1035 | break; |
fb73857a | 1036 | case '\023': /* ^S */ |
1604cfb0 MS |
1037 | if (nextchar == '\0') { |
1038 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) | |
1039 | SvOK_off(sv); | |
1040 | else if (PL_in_eval) | |
1041 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); | |
1042 | else | |
1043 | sv_setiv(sv, 0); | |
1044 | } | |
1045 | else if (strEQ(remaining, "AFE_LOCALES")) { | |
f512d242 KW |
1046 | |
1047 | #if ! defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE) | |
1048 | ||
1604cfb0 | 1049 | sv_setuv(sv, (UV) 1); |
f512d242 KW |
1050 | |
1051 | #else | |
1604cfb0 | 1052 | sv_setuv(sv, (UV) 0); |
f512d242 KW |
1053 | |
1054 | #endif | |
1055 | ||
1056 | } | |
1604cfb0 | 1057 | break; |
79072805 | 1058 | case '\024': /* ^T */ |
1604cfb0 | 1059 | if (nextchar == '\0') { |
88e89b8a | 1060 | #ifdef BIG_TIME |
7c36658b | 1061 | sv_setnv(sv, PL_basetime); |
88e89b8a | 1062 | #else |
7c36658b | 1063 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 1064 | #endif |
7c36658b | 1065 | } |
1604cfb0 | 1066 | else if (strEQ(remaining, "AINT")) |
284167a5 | 1067 | sv_setiv(sv, TAINTING_get |
1604cfb0 MS |
1068 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) |
1069 | : 0); | |
7c36658b | 1070 | break; |
e07ea26a | 1071 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
1604cfb0 MS |
1072 | if (strEQ(remaining, "NICODE")) |
1073 | sv_setuv(sv, (UV) PL_unicode); | |
1074 | else if (strEQ(remaining, "TF8LOCALE")) | |
1075 | sv_setuv(sv, (UV) PL_utf8locale); | |
1076 | else if (strEQ(remaining, "TF8CACHE")) | |
1077 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
1078 | break; |
1079 | case '\027': /* ^W & $^WARNING_BITS */ | |
1604cfb0 MS |
1080 | if (nextchar == '\0') |
1081 | sv_setiv(sv, (IV)cBOOL(PL_dowarn & G_WARN_ON)); | |
1082 | else if (strEQ(remaining, "ARNING_BITS")) { | |
1083 | if (PL_compiling.cop_warnings == pWARN_NONE) { | |
1084 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; | |
1085 | } | |
1086 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
e03e82a0 | 1087 | goto set_undef; |
1604cfb0 | 1088 | } |
d3a7d8c7 | 1089 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
1604cfb0 MS |
1090 | sv_setpvn(sv, WARN_ALLstring, WARNsize); |
1091 | } | |
4438c4b7 | 1092 | else { |
f8552c1a YO |
1093 | sv_setpvn(sv, PL_compiling.cop_warnings, |
1094 | RCPV_LEN(PL_compiling.cop_warnings)); | |
1604cfb0 MS |
1095 | } |
1096 | } | |
1097 | break; | |
79072805 | 1098 | case '+': |
1604cfb0 MS |
1099 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
1100 | paren = RX_LASTPAREN(rx); | |
1101 | if (paren) | |
2c7b5d76 | 1102 | goto do_numbuf_fetch; |
1604cfb0 | 1103 | } |
e03e82a0 | 1104 | goto set_undef; |
a01268b5 | 1105 | case '\016': /* ^N */ |
1604cfb0 MS |
1106 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
1107 | paren = RX_LASTCLOSEPAREN(rx); | |
fe5492d9 YO |
1108 | if (RX_PARNO_TO_LOGICAL(rx)) |
1109 | paren = RX_PARNO_TO_LOGICAL(rx)[paren]; | |
1604cfb0 | 1110 | if (paren) |
2c7b5d76 | 1111 | goto do_numbuf_fetch; |
1604cfb0 | 1112 | } |
e03e82a0 | 1113 | goto set_undef; |
79072805 | 1114 | case '.': |
1604cfb0 MS |
1115 | if (GvIO(PL_last_in_gv)) { |
1116 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); | |
1117 | } | |
1118 | break; | |
79072805 | 1119 | case '?': |
1604cfb0 MS |
1120 | { |
1121 | sv_setiv(sv, (IV)STATUS_CURRENT); | |
ff0cee69 | 1122 | #ifdef COMPLEX_STATUS |
1604cfb0 MS |
1123 | SvUPGRADE(sv, SVt_PVLV); |
1124 | LvTARGOFF(sv) = PL_statusvalue; | |
1125 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1126 | #endif |
1604cfb0 MS |
1127 | } |
1128 | break; | |
79072805 | 1129 | case '^': |
1604cfb0 MS |
1130 | if (GvIOp(PL_defoutgv)) |
1131 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); | |
1132 | if (s) | |
1133 | sv_setpv(sv,s); | |
1134 | else { | |
1135 | sv_setpv(sv,GvENAME(PL_defoutgv)); | |
1136 | sv_catpvs(sv,"_TOP"); | |
1137 | } | |
1138 | break; | |
79072805 | 1139 | case '~': |
1604cfb0 MS |
1140 | if (GvIOp(PL_defoutgv)) |
1141 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); | |
1142 | if (!s) | |
1143 | s = GvENAME(PL_defoutgv); | |
1144 | sv_setpv(sv,s); | |
1145 | break; | |
79072805 | 1146 | case '=': |
1604cfb0 MS |
1147 | if (GvIO(PL_defoutgv)) |
1148 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); | |
1149 | break; | |
79072805 | 1150 | case '-': |
1604cfb0 MS |
1151 | if (GvIO(PL_defoutgv)) |
1152 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); | |
1153 | break; | |
79072805 | 1154 | case '%': |
1604cfb0 MS |
1155 | if (GvIO(PL_defoutgv)) |
1156 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); | |
1157 | break; | |
79072805 | 1158 | case ':': |
79072805 | 1159 | case '/': |
1604cfb0 | 1160 | break; |
79072805 | 1161 | case '[': |
1604cfb0 MS |
1162 | sv_setiv(sv, 0); |
1163 | break; | |
79072805 | 1164 | case '|': |
1604cfb0 MS |
1165 | if (GvIO(PL_defoutgv)) |
1166 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); | |
1167 | break; | |
79072805 | 1168 | case '\\': |
1604cfb0 MS |
1169 | if (PL_ors_sv) |
1170 | sv_copypv(sv, PL_ors_sv); | |
1171 | else | |
e03e82a0 | 1172 | goto set_undef; |
1604cfb0 | 1173 | break; |
0e219455 | 1174 | case '$': /* $$ */ |
1604cfb0 MS |
1175 | { |
1176 | IV const pid = (IV)PerlProc_getpid(); | |
1177 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { | |
1178 | /* never set manually, or at least not since last fork */ | |
1179 | sv_setiv(sv, pid); | |
1180 | /* never unsafe, even if reading in a tainted expression */ | |
1181 | SvTAINTED_off(sv); | |
1182 | } | |
1183 | /* else a value has been assigned manually, so do nothing */ | |
1184 | } | |
1185 | break; | |
79072805 | 1186 | case '<': |
dfff4baf | 1187 | sv_setuid(sv, PerlProc_getuid()); |
1604cfb0 | 1188 | break; |
79072805 | 1189 | case '>': |
dfff4baf | 1190 | sv_setuid(sv, PerlProc_geteuid()); |
1604cfb0 | 1191 | break; |
79072805 | 1192 | case '(': |
dfff4baf | 1193 | sv_setgid(sv, PerlProc_getgid()); |
1604cfb0 | 1194 | goto add_groups; |
79072805 | 1195 | case ')': |
dfff4baf | 1196 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1197 | add_groups: |
79072805 | 1198 | #ifdef HAS_GETGROUPS |
1604cfb0 MS |
1199 | { |
1200 | Groups_t *gary = NULL; | |
375ed12a JH |
1201 | I32 num_groups = getgroups(0, gary); |
1202 | if (num_groups > 0) { | |
19742f39 | 1203 | I32 i; |
375ed12a JH |
1204 | Newx(gary, num_groups, Groups_t); |
1205 | num_groups = getgroups(num_groups, gary); | |
1206 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1207 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1208 | Safefree(gary); |
1209 | } | |
1604cfb0 | 1210 | } |
1a93d8df FG |
1211 | |
1212 | /* | |
1213 | Set this to avoid warnings when the SV is used as a number. | |
1214 | Avoid setting the public IOK flag so that serializers will | |
1215 | use the PV. | |
1216 | */ | |
1217 | (void)SvIOKp_on(sv); /* what a wonderful hack! */ | |
cd70abae | 1218 | #endif |
1604cfb0 | 1219 | break; |
79072805 | 1220 | case '0': |
1604cfb0 | 1221 | break; |
79072805 | 1222 | } |
a0d0e21e | 1223 | return 0; |
e03e82a0 DM |
1224 | |
1225 | set_undef: | |
1226 | sv_set_undef(sv); | |
1227 | return 0; | |
79072805 LW |
1228 | } |
1229 | ||
1230 | int | |
864dbfa3 | 1231 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1232 | { |
8772537c | 1233 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1234 | |
7918f24d NC |
1235 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1236 | ||
79072805 | 1237 | if (uf && uf->uf_val) |
1604cfb0 | 1238 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1239 | return 0; |
1240 | } | |
1241 | ||
1242 | int | |
864dbfa3 | 1243 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1244 | { |
9ae3433d | 1245 | STRLEN len = 0, klen; |
50352f16 FG |
1246 | |
1247 | const char *key; | |
888a67f6 | 1248 | const char *s = ""; |
1e422769 | 1249 | |
50352f16 FG |
1250 | SV *keysv = MgSV(mg); |
1251 | ||
1252 | if (keysv == NULL) { | |
1253 | key = mg->mg_ptr; | |
1254 | klen = mg->mg_len; | |
1255 | } | |
1256 | else { | |
1257 | if (!sv_utf8_downgrade(keysv, /* fail_ok */ TRUE)) { | |
1258 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv key (encoding to utf8)"); | |
1259 | } | |
1260 | ||
1261 | key = SvPV_const(keysv,klen); | |
1262 | } | |
1263 | ||
7918f24d NC |
1264 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1265 | ||
613c63b4 | 1266 | SvGETMAGIC(sv); |
12033064 | 1267 | if (SvOK(sv)) { |
613c63b4 CS |
1268 | /* defined environment variables are byte strings; unfortunately |
1269 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1270 | (void)SvPV_force_nomg_nolen(sv); | |
90eef0af | 1271 | (void)sv_utf8_downgrade(sv, /* fail_ok */ TRUE); |
613c63b4 CS |
1272 | if (SvUTF8(sv)) { |
1273 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1274 | SvUTF8_off(sv); | |
1275 | } | |
1276 | s = SvPVX(sv); | |
1277 | len = SvCUR(sv); | |
12033064 CS |
1278 | } |
1279 | my_setenv(key, s); /* does the deed */ | |
1280 | ||
a0d0e21e LW |
1281 | #ifdef DYNAMIC_ENV_FETCH |
1282 | /* We just undefd an environment var. Is a replacement */ | |
1283 | /* waiting in the wings? */ | |
1284 | if (!len) { | |
1604cfb0 MS |
1285 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
1286 | if (valp) | |
1287 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; | |
a0d0e21e LW |
1288 | } |
1289 | #endif | |
1e422769 | 1290 | |
4457f3fc | 1291 | #if !defined(OS2) && !defined(WIN32) |
1604cfb0 MS |
1292 | /* And you'll never guess what the dog had */ |
1293 | /* in its mouth... */ | |
284167a5 | 1294 | if (TAINTING_get) { |
1604cfb0 | 1295 | MgTAINTEDDIR_off(mg); |
1e422769 | 1296 | #ifdef VMS |
1604cfb0 MS |
1297 | if (s && memEQs(key, klen, "DCL$PATH")) { |
1298 | char pathbuf[256], eltbuf[256], *cp, *elt; | |
1299 | int i = 0, j = 0; | |
1300 | ||
1301 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); | |
1302 | elt = eltbuf; | |
1303 | do { /* DCL$PATH may be a search list */ | |
1304 | while (1) { /* as may dev portion of any element */ | |
1305 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1306 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1307 | cando_by_name(S_IWUSR,0,elt) ) { | |
1308 | MgTAINTEDDIR_on(mg); | |
1309 | return 0; | |
1310 | } | |
1311 | } | |
1312 | if ((cp = strchr(elt, ':')) != NULL) | |
1313 | *cp = '\0'; | |
1314 | if (my_trnlnm(elt, eltbuf, j++)) | |
1315 | elt = eltbuf; | |
1316 | else | |
1317 | break; | |
1318 | } | |
1319 | j = 0; | |
1320 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1321 | } | |
1e422769 | 1322 | #endif /* VMS */ |
1604cfb0 MS |
1323 | if (s && memEQs(key, klen, "PATH")) { |
1324 | const char * const strend = s + len; | |
1c9a202f YO |
1325 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1326 | const char path_sep = PL_perllib_sep; | |
1327 | #else | |
1328 | const char path_sep = ':'; | |
1329 | #endif | |
463ee0b2 | 1330 | |
92ec2fce YO |
1331 | #ifndef __VMS |
1332 | /* Does this apply for VMS? | |
1333 | * Empty PATH on linux is treated same as ".", which is forbidden | |
1334 | * under taint. So check if the PATH variable is empty. */ | |
1335 | if (!len) { | |
1336 | MgTAINTEDDIR_on(mg); | |
1337 | return 0; | |
1338 | } | |
1339 | #endif | |
70b484a8 DM |
1340 | /* set MGf_TAINTEDDIR if any component of the new path is |
1341 | * relative or world-writeable */ | |
1604cfb0 MS |
1342 | while (s < strend) { |
1343 | char tmpbuf[256]; | |
1344 | Stat_t st; | |
1345 | I32 i; | |
1604cfb0 MS |
1346 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
1347 | s, strend, path_sep, &i); | |
1348 | s++; | |
1349 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ | |
83269ced | 1350 | #ifdef __VMS |
1604cfb0 MS |
1351 | /* no colon thus no device name -- assume relative path */ |
1352 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1353 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1354 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 | 1355 | #else |
92ec2fce YO |
1356 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ |
1357 | || s == strend /* trailing empty component -- same as "." */ | |
326b5008 | 1358 | #endif |
1604cfb0 MS |
1359 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
1360 | MgTAINTEDDIR_on(mg); | |
1361 | return 0; | |
1362 | } | |
1363 | } | |
1364 | } | |
79072805 | 1365 | } |
4457f3fc | 1366 | #endif /* neither OS2 nor WIN32 */ |
1e422769 | 1367 | |
79072805 LW |
1368 | return 0; |
1369 | } | |
1370 | ||
1371 | int | |
864dbfa3 | 1372 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1373 | { |
7918f24d | 1374 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1375 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1376 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1377 | return 0; |
1378 | } | |
1379 | ||
88e89b8a | 1380 | int |
864dbfa3 | 1381 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1382 | { |
7918f24d | 1383 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1384 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1385 | #if defined(VMS) |
cea2e8a9 | 1386 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1387 | #else |
3280af22 | 1388 | if (PL_localizing) { |
1604cfb0 MS |
1389 | HE* entry; |
1390 | my_clearenv(); | |
1391 | hv_iterinit(MUTABLE_HV(sv)); | |
1392 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
1393 | I32 keylen; | |
1394 | my_setenv(hv_iterkey(entry, &keylen), | |
1395 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); | |
1396 | } | |
fb73857a | 1397 | } |
1398 | #endif | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | int | |
864dbfa3 | 1403 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1404 | { |
7918f24d | 1405 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1406 | PERL_UNUSED_ARG(sv); |
1407 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1408 | #if defined(VMS) |
1409 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1410 | #else | |
1411 | my_clearenv(); | |
1412 | #endif | |
3e3baf6d | 1413 | return 0; |
66b1d557 HM |
1414 | } |
1415 | ||
64ca3a65 | 1416 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1417 | #ifdef HAS_SIGPROCMASK |
1418 | static void | |
1419 | restore_sigmask(pTHX_ SV *save_sv) | |
1420 | { | |
0bd48802 | 1421 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1422 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1423 | } |
1424 | #endif | |
66b1d557 | 1425 | int |
864dbfa3 | 1426 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1427 | { |
88e89b8a | 1428 | /* Are we fetching a signal entry? */ |
708854f2 | 1429 | int i = (I16)mg->mg_private; |
7918f24d NC |
1430 | |
1431 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1432 | ||
708854f2 | 1433 | if (!i) { |
84c7b88c BF |
1434 | STRLEN siglen; |
1435 | const char * sig = MgPV_const(mg, siglen); | |
1436 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1437 | } |
1438 | ||
e02bfb16 | 1439 | if (i > 0) { |
1604cfb0 MS |
1440 | if(PL_psig_ptr[i]) |
1441 | sv_setsv(sv,PL_psig_ptr[i]); | |
1442 | else { | |
1443 | Sighandler_t sigstate = rsignal_state(i); | |
23ada85b | 1444 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
1604cfb0 MS |
1445 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1446 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1447 | #endif |
1448 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
1604cfb0 MS |
1449 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1450 | sigstate = SIG_DFL; | |
85b332e2 | 1451 | #endif |
1604cfb0 MS |
1452 | /* cache state so we don't fetch it again */ |
1453 | if(sigstate == (Sighandler_t) SIG_IGN) | |
1454 | sv_setpvs(sv,"IGNORE"); | |
1455 | else | |
e03e82a0 | 1456 | sv_set_undef(sv); |
1604cfb0 MS |
1457 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
1458 | SvTEMP_off(sv); | |
1459 | } | |
88e89b8a | 1460 | } |
1461 | return 0; | |
1462 | } | |
1463 | int | |
864dbfa3 | 1464 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1465 | { |
7918f24d | 1466 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1467 | |
38a124f0 | 1468 | magic_setsig(NULL, mg); |
179c85a2 | 1469 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1470 | } |
3d37d572 | 1471 | |
dc37125b | 1472 | |
5e7940ce | 1473 | #ifdef PERL_USE_3ARG_SIGHANDLER |
dc37125b DM |
1474 | Signal_t |
1475 | Perl_csighandler(int sig, Siginfo_t *sip, void *uap) | |
1476 | { | |
1477 | Perl_csighandler3(sig, sip, uap); | |
1478 | } | |
8aad04aa | 1479 | #else |
dc37125b | 1480 | Signal_t |
0a8e0eff | 1481 | Perl_csighandler(int sig) |
dc37125b DM |
1482 | { |
1483 | Perl_csighandler3(sig, NULL, NULL); | |
1484 | } | |
8aad04aa | 1485 | #endif |
dc37125b DM |
1486 | |
1487 | Signal_t | |
1488 | Perl_csighandler1(int sig) | |
1489 | { | |
1490 | Perl_csighandler3(sig, NULL, NULL); | |
1491 | } | |
1492 | ||
1493 | /* Handler intended to directly handle signal calls from the kernel. | |
1494 | * (Depending on configuration, the kernel may actually call one of the | |
1495 | * wrappers csighandler() or csighandler1() instead.) | |
1496 | * It either queues up the signal or dispatches it immediately depending | |
1497 | * on whether safe signals are enabled and whether the signal is capable | |
1498 | * of being deferred (e.g. SEGV isn't). | |
1499 | */ | |
1500 | ||
1501 | Signal_t | |
1502 | Perl_csighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
0a8e0eff | 1503 | { |
1018e26f NIS |
1504 | #ifdef PERL_GET_SIG_CONTEXT |
1505 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1506 | #else | |
85b332e2 CL |
1507 | dTHX; |
1508 | #endif | |
5e7940ce DM |
1509 | |
1510 | #ifdef PERL_USE_3ARG_SIGHANDLER | |
ffb6256b JH |
1511 | #if defined(__cplusplus) && defined(__GNUC__) |
1512 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1513 | * parameters would be warned about. */ | |
1514 | PERL_UNUSED_ARG(sip); | |
1515 | PERL_UNUSED_ARG(uap); | |
1516 | #endif | |
1271a1be | 1517 | #endif |
5e7940ce | 1518 | |
23ada85b | 1519 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1520 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1521 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1522 | #endif |
2e34cc90 | 1523 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1524 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1525 | #ifdef KILL_BY_SIGPRC |
1526 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1527 | #else | |
1528 | exit(1); | |
1529 | #endif | |
1530 | #endif | |
406878dd | 1531 | if ( |
853d2c32 | 1532 | #ifdef SIGILL |
1604cfb0 | 1533 | sig == SIGILL || |
853d2c32 RGS |
1534 | #endif |
1535 | #ifdef SIGBUS | |
1604cfb0 | 1536 | sig == SIGBUS || |
853d2c32 RGS |
1537 | #endif |
1538 | #ifdef SIGSEGV | |
1604cfb0 | 1539 | sig == SIGSEGV || |
5892d8f5 HS |
1540 | #endif |
1541 | #ifdef SIGFPE | |
1542 | sig == SIGFPE || | |
853d2c32 | 1543 | #endif |
1604cfb0 MS |
1544 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) |
1545 | /* Call the perl level handler now-- | |
1546 | * with risk we may be in malloc() or being destructed etc. */ | |
8a5e470b DM |
1547 | { |
1548 | if (PL_sighandlerp == Perl_sighandler) | |
1549 | /* default handler, so can call perly_sighandler() directly | |
1550 | * rather than via Perl_sighandler, passing the extra | |
1551 | * 'safe = false' arg | |
1552 | */ | |
ddb513d5 | 1553 | Perl_perly_sighandler(sig, NULL, NULL, 0 /* unsafe */); |
8a5e470b | 1554 | else |
5e7940ce | 1555 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1556 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1557 | #else |
8a5e470b | 1558 | (*PL_sighandlerp)(sig); |
92807b6d | 1559 | #endif |
8a5e470b | 1560 | } |
406878dd | 1561 | else { |
1604cfb0 MS |
1562 | if (!PL_psig_pend) return; |
1563 | /* Set a flag to say this signal is pending, that is awaiting delivery after | |
1564 | * the current Perl opcode completes */ | |
1565 | PL_psig_pend[sig]++; | |
406878dd GA |
1566 | |
1567 | #ifndef SIG_PENDING_DIE_COUNT | |
1568 | # define SIG_PENDING_DIE_COUNT 120 | |
1569 | #endif | |
1604cfb0 MS |
1570 | /* Add one to say _a_ signal is pending */ |
1571 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) | |
1572 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1573 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
406878dd | 1574 | } |
0a8e0eff NIS |
1575 | } |
1576 | ||
2e34cc90 CL |
1577 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1578 | void | |
1579 | Perl_csighandler_init(void) | |
1580 | { | |
1581 | int sig; | |
27da23d5 | 1582 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1583 | |
1584 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1585 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1586 | dTHX; |
27da23d5 | 1587 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1588 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1589 | #endif |
1590 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1591 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1592 | #endif |
1593 | } | |
27da23d5 | 1594 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1595 | } |
1596 | #endif | |
1597 | ||
7fe50b8b LT |
1598 | #if defined HAS_SIGPROCMASK |
1599 | static void | |
1600 | unblock_sigmask(pTHX_ void* newset) | |
1601 | { | |
dc3bf405 | 1602 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1603 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1604 | } | |
1605 | #endif | |
1606 | ||
0a8e0eff NIS |
1607 | void |
1608 | Perl_despatch_signals(pTHX) | |
1609 | { | |
1610 | int sig; | |
1611 | PL_sig_pending = 0; | |
1612 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1604cfb0 MS |
1613 | if (PL_psig_pend[sig]) { |
1614 | dSAVE_ERRNO; | |
7fe50b8b | 1615 | #ifdef HAS_SIGPROCMASK |
1604cfb0 MS |
1616 | /* From sigaction(2) (FreeBSD man page): |
1617 | * | Signal routines normally execute with the signal that | |
1618 | * | caused their invocation blocked, but other signals may | |
1619 | * | yet occur. | |
1620 | * Emulation of this behavior (from within Perl) is enabled | |
1621 | * using sigprocmask | |
1622 | */ | |
1623 | int was_blocked; | |
1624 | sigset_t newset, oldset; | |
1625 | ||
1626 | sigemptyset(&newset); | |
1627 | sigaddset(&newset, sig); | |
1628 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1629 | was_blocked = sigismember(&oldset, sig); | |
1630 | if (!was_blocked) { | |
1631 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1632 | ENTER; | |
1633 | SAVEFREESV(save_sv); | |
1634 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1635 | } | |
1636 | #endif | |
1637 | PL_psig_pend[sig] = 0; | |
8a5e470b DM |
1638 | if (PL_sighandlerp == Perl_sighandler) |
1639 | /* default handler, so can call perly_sighandler() directly | |
1640 | * rather than via Perl_sighandler, passing the extra | |
1641 | * 'safe = true' arg | |
1642 | */ | |
1643 | Perl_perly_sighandler(sig, NULL, NULL, 1 /* safe */); | |
1644 | else | |
5e7940ce | 1645 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1646 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1647 | #else |
8a5e470b | 1648 | (*PL_sighandlerp)(sig); |
92807b6d | 1649 | #endif |
8a5e470b | 1650 | |
7fe50b8b | 1651 | #ifdef HAS_SIGPROCMASK |
1604cfb0 MS |
1652 | if (!was_blocked) |
1653 | LEAVE; | |
55534442 | 1654 | #endif |
1604cfb0 MS |
1655 | RESTORE_ERRNO; |
1656 | } | |
0a8e0eff NIS |
1657 | } |
1658 | } | |
1659 | ||
38a124f0 | 1660 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1661 | int |
864dbfa3 | 1662 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1663 | { |
79072805 | 1664 | I32 i; |
cbbf8932 | 1665 | SV** svp = NULL; |
2d4fcd5e AJ |
1666 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1667 | * effects (due to closures). We must make sure that the new disposition | |
1668 | * is in place before it is called. | |
1669 | */ | |
cbbf8932 | 1670 | SV* to_dec = NULL; |
e72dc28c | 1671 | STRLEN len; |
2d4fcd5e AJ |
1672 | #ifdef HAS_SIGPROCMASK |
1673 | sigset_t set, save; | |
1674 | SV* save_sv; | |
1675 | #endif | |
eb578fdb | 1676 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1677 | |
1678 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1679 | ||
748a9306 | 1680 | if (*s == '_') { |
84c7b88c | 1681 | if (memEQs(s, len, "__DIE__")) |
1604cfb0 MS |
1682 | svp = &PL_diehook; |
1683 | else if (memEQs(s, len, "__WARN__") | |
1684 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { | |
1685 | /* Merge the existing behaviours, which are as follows: | |
1686 | magic_setsig, we always set svp to &PL_warnhook | |
1687 | (hence we always change the warnings handler) | |
1688 | For magic_clearsig, we don't change the warnings handler if it's | |
1689 | set to the &PL_warnhook. */ | |
1690 | svp = &PL_warnhook; | |
84c7b88c BF |
1691 | } else if (sv) { |
1692 | SV *tmp = sv_newmortal(); | |
1693 | Perl_croak(aTHX_ "No such hook: %s", | |
1694 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1695 | } | |
1604cfb0 MS |
1696 | i = 0; |
1697 | if (svp && *svp) { | |
1698 | if (*svp != PERL_WARNHOOK_FATAL) | |
1699 | to_dec = *svp; | |
1700 | *svp = NULL; | |
1701 | } | |
748a9306 LW |
1702 | } |
1703 | else { | |
1604cfb0 MS |
1704 | i = (I16)mg->mg_private; |
1705 | if (!i) { | |
1706 | i = whichsig_pvn(s, len); /* ...no, a brick */ | |
1707 | mg->mg_private = (U16)i; | |
1708 | } | |
1709 | if (i <= 0) { | |
1710 | if (sv) { | |
84c7b88c | 1711 | SV *tmp = sv_newmortal(); |
1604cfb0 | 1712 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", |
84c7b88c BF |
1713 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); |
1714 | } | |
1604cfb0 MS |
1715 | return 0; |
1716 | } | |
2d4fcd5e | 1717 | #ifdef HAS_SIGPROCMASK |
1604cfb0 MS |
1718 | /* Avoid having the signal arrive at a bad time, if possible. */ |
1719 | sigemptyset(&set); | |
1720 | sigaddset(&set,i); | |
1721 | sigprocmask(SIG_BLOCK, &set, &save); | |
1722 | ENTER; | |
1723 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); | |
1724 | SAVEFREESV(save_sv); | |
1725 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1726 | #endif | |
1727 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1728 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1604cfb0 | 1729 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1730 | #endif |
23ada85b | 1731 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
1604cfb0 | 1732 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1733 | #endif |
2e34cc90 | 1734 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
1604cfb0 MS |
1735 | PL_sig_defaulting[i] = 0; |
1736 | #endif | |
1737 | to_dec = PL_psig_ptr[i]; | |
1738 | if (sv) { | |
1739 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1740 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
1741 | ||
1742 | /* Signals don't change name during the program's execution, so once | |
1743 | they're cached in the appropriate slot of PL_psig_name, they can | |
1744 | stay there. | |
1745 | ||
1746 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1747 | at least, doing most of the work. */ | |
1748 | if (!PL_psig_name[i]) { | |
1749 | const char* name = PL_sig_name[i]; | |
1750 | PL_psig_name[i] = newSVpvn(name, strlen(name)); | |
1751 | SvREADONLY_on(PL_psig_name[i]); | |
1752 | } | |
1753 | } else { | |
1754 | SvREFCNT_dec(PL_psig_name[i]); | |
1755 | PL_psig_name[i] = NULL; | |
1756 | PL_psig_ptr[i] = NULL; | |
1757 | } | |
748a9306 | 1758 | } |
38a124f0 | 1759 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
1604cfb0 MS |
1760 | if (i) { |
1761 | (void)rsignal(i, PL_csighandlerp); | |
1762 | } | |
1763 | else | |
1764 | *svp = SvREFCNT_inc_simple_NN(sv); | |
38a124f0 | 1765 | } else { |
1604cfb0 MS |
1766 | if (sv && SvOK(sv)) { |
1767 | s = SvPV_force(sv, len); | |
1768 | } else { | |
1769 | sv = NULL; | |
1770 | } | |
1771 | if (sv && memEQs(s, len,"IGNORE")) { | |
1772 | if (i) { | |
23ada85b | 1773 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
1604cfb0 MS |
1774 | PL_sig_ignoring[i] = 1; |
1775 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1776 | #else |
1604cfb0 | 1777 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1778 | #endif |
1604cfb0 MS |
1779 | } |
1780 | } | |
1781 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { | |
1782 | if (i) { | |
2e34cc90 | 1783 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
1604cfb0 MS |
1784 | PL_sig_defaulting[i] = 1; |
1785 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1786 | #else |
1604cfb0 MS |
1787 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
1788 | #endif | |
1789 | } | |
1790 | } | |
1791 | else { | |
1792 | /* | |
1793 | * We should warn if HINT_STRICT_REFS, but without | |
1794 | * access to a known hint bit in a known OP, we can't | |
1795 | * tell whether HINT_STRICT_REFS is in force or not. | |
1796 | */ | |
1797 | if (!memchr(s, ':', len) && !memchr(s, '\'', len)) | |
1798 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), | |
1799 | SV_GMAGIC); | |
1800 | if (i) | |
1801 | (void)rsignal(i, PL_csighandlerp); | |
1802 | else | |
1803 | *svp = SvREFCNT_inc_simple_NN(sv); | |
1804 | } | |
748a9306 | 1805 | } |
9dfa190b | 1806 | |
2d4fcd5e AJ |
1807 | #ifdef HAS_SIGPROCMASK |
1808 | if(i) | |
1604cfb0 | 1809 | LEAVE; |
2d4fcd5e | 1810 | #endif |
ef8d46e8 | 1811 | SvREFCNT_dec(to_dec); |
79072805 LW |
1812 | return 0; |
1813 | } | |
64ca3a65 | 1814 | #endif /* !PERL_MICRO */ |
79072805 LW |
1815 | |
1816 | int | |
55f5e765 LT |
1817 | Perl_magic_setsigall(pTHX_ SV* sv, MAGIC* mg) |
1818 | { | |
1819 | PERL_ARGS_ASSERT_MAGIC_SETSIGALL; | |
1820 | PERL_UNUSED_ARG(mg); | |
1821 | ||
1822 | if (PL_localizing == 2) { | |
1823 | HV* hv = (HV*)sv; | |
1824 | HE* current; | |
1825 | hv_iterinit(hv); | |
1826 | while ((current = hv_iternext(hv))) { | |
1827 | SV* sigelem = hv_iterval(hv, current); | |
1828 | mg_set(sigelem); | |
1829 | } | |
1830 | } | |
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | int | |
864dbfa3 | 1835 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1836 | { |
7918f24d | 1837 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1838 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1839 | |
89c14e2e | 1840 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1841 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
1604cfb0 | 1842 | return 0; |
89c14e2e | 1843 | |
0e446081 | 1844 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1845 | } |
1846 | ||
0e446081 | 1847 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1848 | int |
52b45067 RD |
1849 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1850 | { | |
52b45067 | 1851 | HV* stash; |
7918f24d NC |
1852 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1853 | ||
52b45067 | 1854 | /* Bail out if destruction is going on */ |
627364f1 | 1855 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1856 | |
0e446081 | 1857 | if (sv) |
1604cfb0 | 1858 | av_clear(MUTABLE_AV(sv)); |
52b45067 | 1859 | |
6624142a | 1860 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1604cfb0 MS |
1861 | /* This occurs with setisa_elem magic, which calls this |
1862 | same function. */ | |
1863 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
6624142a | 1864 | |
316ebaf2 | 1865 | assert(mg); |
6624142a | 1866 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1604cfb0 MS |
1867 | SV **svp = AvARRAY((AV *)mg->mg_obj); |
1868 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1869 | while (items--) { | |
1870 | stash = GvSTASH((GV *)*svp++); | |
2e4090b8 | 1871 | if (stash && HvHasENAME(stash)) mro_isa_changed_in(stash); |
1604cfb0 | 1872 | } |
6624142a | 1873 | |
1604cfb0 | 1874 | return 0; |
6624142a FC |
1875 | } |
1876 | ||
52b45067 | 1877 | stash = GvSTASH( |
6624142a | 1878 | (const GV *)mg->mg_obj |
52b45067 RD |
1879 | ); |
1880 | ||
00169e2c FC |
1881 | /* The stash may have been detached from the symbol table, so check its |
1882 | name before doing anything. */ | |
2e4090b8 | 1883 | if (stash && HvHasENAME(stash)) |
1604cfb0 | 1884 | mro_isa_changed_in(stash); |
52b45067 RD |
1885 | |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | int | |
864dbfa3 | 1890 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1891 | { |
85fbaab2 | 1892 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1893 | I32 i = 0; |
7918f24d NC |
1894 | |
1895 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1896 | PERL_UNUSED_ARG(mg); |
7719e241 | 1897 | |
6ff81951 | 1898 | if (hv) { |
497b47a8 | 1899 | (void) hv_iterinit(hv); |
ad64d0ec | 1900 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1604cfb0 | 1901 | i = HvUSEDKEYS(hv); |
497b47a8 | 1902 | else { |
1604cfb0 MS |
1903 | while (hv_iternext(hv)) |
1904 | i++; | |
497b47a8 | 1905 | } |
6ff81951 GS |
1906 | } |
1907 | ||
1908 | sv_setiv(sv, (IV)i); | |
1909 | return 0; | |
1910 | } | |
1911 | ||
1912 | int | |
864dbfa3 | 1913 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1914 | { |
7918f24d | 1915 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1916 | PERL_UNUSED_ARG(mg); |
946ec16e | 1917 | if (LvTARG(sv)) { |
1604cfb0 | 1918 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e | 1919 | } |
1920 | return 0; | |
ac27b0f5 | 1921 | } |
946ec16e | 1922 | |
efaf3674 | 1923 | /* |
3f620621 | 1924 | =for apidoc_section $magic |
efaf3674 DM |
1925 | =for apidoc magic_methcall |
1926 | ||
1927 | Invoke a magic method (like FETCH). | |
1928 | ||
2baee27b FC |
1929 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1930 | ||
1931 | C<meth> is the name of the method to call. | |
1932 | ||
1933 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1934 | ||
1935 | The C<flags> can be: | |
1936 | ||
1937 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1938 | return a value | |
1939 | G_UNDEF_FILL fill the stack with argc pointers to | |
1940 | PL_sv_undef | |
1941 | ||
1942 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1943 | |
796b6530 | 1944 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1945 | |
1946 | ||
1947 | =cut | |
1948 | */ | |
1949 | ||
1950 | SV* | |
36925d9e | 1951 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
1604cfb0 | 1952 | U32 argc, ...) |
a0d0e21e LW |
1953 | { |
1954 | dSP; | |
efaf3674 | 1955 | SV* ret = NULL; |
463ee0b2 | 1956 | |
7918f24d NC |
1957 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1958 | ||
efaf3674 | 1959 | ENTER; |
d1d7a15d NC |
1960 | |
1961 | if (flags & G_WRITING_TO_STDERR) { | |
1604cfb0 | 1962 | SAVETMPS; |
d1d7a15d | 1963 | |
1604cfb0 MS |
1964 | save_re_context(); |
1965 | SAVESPTR(PL_stderrgv); | |
1966 | PL_stderrgv = NULL; | |
d1d7a15d NC |
1967 | } |
1968 | ||
efaf3674 | 1969 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1970 | PUSHMARK(SP); |
efaf3674 | 1971 | |
052a7c76 DM |
1972 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1973 | assert(argc <= I32_MAX); | |
1974 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1975 | PUSHs(SvTIED_obj(sv, mg)); |
1976 | if (flags & G_UNDEF_FILL) { | |
1604cfb0 MS |
1977 | while (argc--) { |
1978 | PUSHs(&PL_sv_undef); | |
1979 | } | |
67549bd2 | 1980 | } else if (argc > 0) { |
1604cfb0 MS |
1981 | va_list args; |
1982 | va_start(args, argc); | |
046b0c7d | 1983 | |
1604cfb0 MS |
1984 | do { |
1985 | SV *const this_sv = va_arg(args, SV *); | |
1986 | PUSHs(this_sv); | |
1987 | } while (--argc); | |
046b0c7d | 1988 | |
1604cfb0 | 1989 | va_end(args); |
88e89b8a | 1990 | } |
463ee0b2 | 1991 | PUTBACK; |
efaf3674 | 1992 | if (flags & G_DISCARD) { |
1604cfb0 | 1993 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1994 | } |
1995 | else { | |
1604cfb0 MS |
1996 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
1997 | ret = *PL_stack_sp--; | |
efaf3674 DM |
1998 | } |
1999 | POPSTACK; | |
d1d7a15d | 2000 | if (flags & G_WRITING_TO_STDERR) |
1604cfb0 | 2001 | FREETMPS; |
efaf3674 DM |
2002 | LEAVE; |
2003 | return ret; | |
2004 | } | |
2005 | ||
efaf3674 | 2006 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 2007 | |
efaf3674 | 2008 | STATIC SV* |
36925d9e | 2009 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
2010 | int n, SV *val) |
2011 | { | |
efaf3674 DM |
2012 | SV* arg1 = NULL; |
2013 | ||
2014 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
2015 | ||
2016 | if (mg->mg_ptr) { | |
1604cfb0 MS |
2017 | if (mg->mg_len >= 0) { |
2018 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); | |
2019 | } | |
2020 | else if (mg->mg_len == HEf_SVKEY) | |
2021 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
efaf3674 DM |
2022 | } |
2023 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
1604cfb0 MS |
2024 | arg1 = newSViv((IV)(mg->mg_len)); |
2025 | sv_2mortal(arg1); | |
efaf3674 DM |
2026 | } |
2027 | if (!arg1) { | |
1604cfb0 | 2028 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 2029 | } |
046b0c7d | 2030 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e | 2031 | } |
2032 | ||
76e3520e | 2033 | STATIC int |
36925d9e | 2034 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 2035 | { |
efaf3674 | 2036 | SV* ret; |
463ee0b2 | 2037 | |
7918f24d NC |
2038 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
2039 | ||
efaf3674 DM |
2040 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
2041 | if (ret) | |
1604cfb0 | 2042 | sv_setsv(sv, ret); |
a0d0e21e LW |
2043 | return 0; |
2044 | } | |
463ee0b2 | 2045 | |
a0d0e21e | 2046 | int |
864dbfa3 | 2047 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2048 | { |
7918f24d NC |
2049 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
2050 | ||
fd69380d | 2051 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
1604cfb0 | 2052 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 2053 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
2054 | return 0; |
2055 | } | |
2056 | ||
2057 | int | |
864dbfa3 | 2058 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 2059 | { |
b112cff9 DM |
2060 | MAGIC *tmg; |
2061 | SV *val; | |
7918f24d NC |
2062 | |
2063 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2064 | ||
b112cff9 DM |
2065 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2066 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2067 | * public flags indicate its value based on copying from $val. Doing | |
2068 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2069 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2070 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2071 | * enabled, even though taint magic is in the chain. In which case, | |
2072 | * fake up a temporary tainted value (this is easier than temporarily | |
2073 | * re-enabling magic on sv). */ | |
2074 | ||
284167a5 | 2075 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
1604cfb0 | 2076 | && (tmg->mg_len & 1)) |
b112cff9 | 2077 | { |
1604cfb0 MS |
2078 | val = sv_mortalcopy(sv); |
2079 | SvTAINTED_on(val); | |
b112cff9 DM |
2080 | } |
2081 | else | |
1604cfb0 | 2082 | val = sv; |
b112cff9 | 2083 | |
36925d9e | 2084 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2085 | return 0; |
2086 | } | |
2087 | ||
2088 | int | |
864dbfa3 | 2089 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2090 | { |
7918f24d NC |
2091 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2092 | ||
4c13be3f | 2093 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2094 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2095 | } |
463ee0b2 | 2096 | |
93965878 NIS |
2097 | |
2098 | U32 | |
864dbfa3 | 2099 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2100 | { |
22846ab4 | 2101 | I32 retval = 0; |
efaf3674 | 2102 | SV* retsv; |
93965878 | 2103 | |
7918f24d NC |
2104 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2105 | ||
36925d9e | 2106 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 | 2107 | if (retsv) { |
1604cfb0 MS |
2108 | retval = SvIV(retsv)-1; |
2109 | if (retval < -1) | |
2110 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2111 | } |
22846ab4 | 2112 | return (U32) retval; |
93965878 NIS |
2113 | } |
2114 | ||
cea2e8a9 GS |
2115 | int |
2116 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2117 | { |
7918f24d NC |
2118 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2119 | ||
36925d9e | 2120 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2121 | return 0; |
2122 | } | |
2123 | ||
2124 | int | |
864dbfa3 | 2125 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2126 | { |
efaf3674 | 2127 | SV* ret; |
463ee0b2 | 2128 | |
7918f24d NC |
2129 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2130 | ||
36925d9e | 2131 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
1604cfb0 | 2132 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); |
efaf3674 | 2133 | if (ret) |
1604cfb0 | 2134 | sv_setsv(key,ret); |
79072805 LW |
2135 | return 0; |
2136 | } | |
2137 | ||
2138 | int | |
1146e912 | 2139 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2140 | { |
7918f24d NC |
2141 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2142 | ||
36925d9e | 2143 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2144 | } |
a0d0e21e | 2145 | |
a3bcc51e TP |
2146 | SV * |
2147 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2148 | { | |
5fcbf73d | 2149 | SV *retval; |
ad64d0ec NC |
2150 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2151 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2152 | |
7918f24d NC |
2153 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2154 | ||
a3bcc51e TP |
2155 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2156 | SV *key; | |
bfcb3514 | 2157 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2158 | /* we are in an iteration so the hash cannot be empty */ |
2159 | return &PL_sv_yes; | |
2160 | /* no xhv_eiter so now use FIRSTKEY */ | |
2161 | key = sv_newmortal(); | |
ad64d0ec | 2162 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2163 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2164 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2165 | } | |
2166 | ||
2167 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2168 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2169 | if (!retval) |
1604cfb0 | 2170 | retval = &PL_sv_undef; |
a3bcc51e TP |
2171 | return retval; |
2172 | } | |
2173 | ||
a0d0e21e | 2174 | int |
864dbfa3 | 2175 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2176 | { |
089b5c60 | 2177 | SV **svp; |
7918f24d NC |
2178 | |
2179 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2180 | ||
089b5c60 NC |
2181 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2182 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2183 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2184 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2185 | } |
2186 | ||
2187 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2188 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a | 2189 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
1604cfb0 | 2190 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); |
089b5c60 | 2191 | |
8772537c | 2192 | if (svp && SvIOKp(*svp)) { |
1604cfb0 MS |
2193 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2194 | if (o) { | |
88df5f01 | 2195 | #ifdef PERL_DEBUG_READONLY_OPS |
1604cfb0 | 2196 | Slab_to_rw(OpSLAB(o)); |
88df5f01 | 2197 | #endif |
1604cfb0 MS |
2198 | /* set or clear breakpoint in the relevant control op */ |
2199 | if (SvTRUE(sv)) | |
2200 | o->op_flags |= OPf_SPECIAL; | |
2201 | else | |
2202 | o->op_flags &= ~OPf_SPECIAL; | |
88df5f01 | 2203 | #ifdef PERL_DEBUG_READONLY_OPS |
1604cfb0 | 2204 | Slab_to_ro(OpSLAB(o)); |
88df5f01 | 2205 | #endif |
1604cfb0 | 2206 | } |
5df8de69 | 2207 | } |
79072805 LW |
2208 | return 0; |
2209 | } | |
2210 | ||
2211 | int | |
8772537c | 2212 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2213 | { |
502c6561 | 2214 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2215 | |
2216 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2217 | ||
83bf042f | 2218 | if (obj) { |
1604cfb0 | 2219 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2220 | } else { |
3773545d | 2221 | sv_set_undef(sv); |
83bf042f | 2222 | } |
79072805 LW |
2223 | return 0; |
2224 | } | |
2225 | ||
2226 | int | |
864dbfa3 | 2227 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2228 | { |
502c6561 | 2229 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2230 | |
2231 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2232 | ||
83bf042f | 2233 | if (obj) { |
1604cfb0 | 2234 | av_fill(obj, SvIV(sv)); |
83bf042f | 2235 | } else { |
1604cfb0 MS |
2236 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2237 | "Attempt to set length of freed array"); | |
83bf042f NC |
2238 | } |
2239 | return 0; | |
2240 | } | |
2241 | ||
2242 | int | |
83f29afa VP |
2243 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2244 | { | |
83f29afa VP |
2245 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2246 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2247 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2248 | |
2249 | /* Reset the iterator when the array is cleared */ | |
4803e7f7 | 2250 | if (sizeof(IV) == sizeof(SSize_t)) { |
1604cfb0 | 2251 | *((IV *) &(mg->mg_len)) = 0; |
4803e7f7 | 2252 | } else { |
1604cfb0 MS |
2253 | if (mg->mg_ptr) |
2254 | *((IV *) mg->mg_ptr) = 0; | |
4803e7f7 | 2255 | } |
83f29afa VP |
2256 | |
2257 | return 0; | |
2258 | } | |
2259 | ||
2260 | int | |
83bf042f NC |
2261 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2262 | { | |
7918f24d | 2263 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2264 | PERL_UNUSED_ARG(sv); |
7918f24d | 2265 | |
94f3782b DM |
2266 | /* during global destruction, mg_obj may already have been freed */ |
2267 | if (PL_in_clean_all) | |
1604cfb0 | 2268 | return 0; |
94f3782b | 2269 | |
83bf042f NC |
2270 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2271 | ||
2272 | if (mg) { | |
1604cfb0 MS |
2273 | /* arylen scalar holds a pointer back to the array, but doesn't own a |
2274 | reference. Hence the we (the array) are about to go away with it | |
2275 | still pointing at us. Clear its pointer, else it would be pointing | |
2276 | at free memory. See the comment in sv_magic about reference loops, | |
2277 | and why it can't own a reference to us. */ | |
2278 | mg->mg_obj = 0; | |
83bf042f | 2279 | } |
a0d0e21e LW |
2280 | return 0; |
2281 | } | |
2282 | ||
2283 | int | |
864dbfa3 | 2284 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2285 | { |
16eb5365 | 2286 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2287 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2288 | |
2289 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2290 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2291 | |
6174b39a | 2292 | if (found && found->mg_len != -1) { |
1604cfb0 MS |
2293 | STRLEN i = found->mg_len; |
2294 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) | |
2295 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); | |
2296 | sv_setuv(sv, i); | |
2297 | return 0; | |
a0d0e21e | 2298 | } |
3773545d | 2299 | sv_set_undef(sv); |
a0d0e21e LW |
2300 | return 0; |
2301 | } | |
2302 | ||
2303 | int | |
864dbfa3 | 2304 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2305 | { |
16eb5365 | 2306 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2307 | SSize_t pos; |
2308 | STRLEN len; | |
53d44271 | 2309 | MAGIC* found; |
aec43834 | 2310 | const char *s; |
a0d0e21e | 2311 | |
7918f24d | 2312 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2313 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2314 | |
96c2a8ff | 2315 | found = mg_find_mglob(lsv); |
3881461a | 2316 | if (!found) { |
1604cfb0 MS |
2317 | if (!SvOK(sv)) |
2318 | return 0; | |
2319 | found = sv_magicext_mglob(lsv); | |
a0d0e21e LW |
2320 | } |
2321 | else if (!SvOK(sv)) { | |
1604cfb0 MS |
2322 | found->mg_len = -1; |
2323 | return 0; | |
a0d0e21e | 2324 | } |
aec43834 | 2325 | s = SvPV_const(lsv, len); |
a0d0e21e | 2326 | |
e1dccc0d | 2327 | pos = SvIV(sv); |
a0ed51b3 | 2328 | |
7e2040f0 | 2329 | if (DO_UTF8(lsv)) { |
19742f39 | 2330 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
1604cfb0 MS |
2331 | if (ulen) |
2332 | len = ulen; | |
a0ed51b3 LW |
2333 | } |
2334 | ||
a0d0e21e | 2335 | if (pos < 0) { |
1604cfb0 MS |
2336 | pos += len; |
2337 | if (pos < 0) | |
2338 | pos = 0; | |
a0d0e21e | 2339 | } |
eb160463 | 2340 | else if (pos > (SSize_t)len) |
1604cfb0 | 2341 | pos = len; |
a0ed51b3 | 2342 | |
3881461a | 2343 | found->mg_len = pos; |
25fdce4a | 2344 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2345 | |
79072805 LW |
2346 | return 0; |
2347 | } | |
2348 | ||
2349 | int | |
864dbfa3 | 2350 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2351 | { |
2352 | STRLEN len; | |
35a4481c | 2353 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2354 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2355 | STRLEN offs = LvTARGOFF(sv); |
2356 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2357 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2358 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2359 | |
2360 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2361 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2362 | |
83f78d1a | 2363 | if (!translate_substr_offsets( |
1604cfb0 MS |
2364 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
2365 | negoff ? -(IV)offs : (IV)offs, !negoff, | |
2366 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
83f78d1a | 2367 | )) { |
1604cfb0 | 2368 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); |
e03e82a0 | 2369 | sv_set_undef(sv); |
1604cfb0 | 2370 | return 0; |
83f78d1a FC |
2371 | } |
2372 | ||
9aa983d2 | 2373 | if (SvUTF8(lsv)) |
1604cfb0 | 2374 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2375 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2376 | if (SvUTF8(lsv)) |
2ef4b674 | 2377 | SvUTF8_on(sv); |
6ff81951 GS |
2378 | return 0; |
2379 | } | |
2380 | ||
2381 | int | |
864dbfa3 | 2382 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2383 | { |
83f78d1a | 2384 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2385 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2386 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2387 | STRLEN lvoff = LvTARGOFF(sv); |
2388 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2389 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2390 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2391 | |
2392 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2393 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2394 | |
a74fb2cd FC |
2395 | SvGETMAGIC(lsv); |
2396 | if (SvROK(lsv)) | |
1604cfb0 MS |
2397 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), |
2398 | "Attempt to use reference as lvalue in substr" | |
2399 | ); | |
fc061ed8 FC |
2400 | SvPV_force_nomg(lsv,lsv_len); |
2401 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a | 2402 | if (!translate_substr_offsets( |
1604cfb0 MS |
2403 | lsv_len, |
2404 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2405 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
83f78d1a | 2406 | )) |
1604cfb0 | 2407 | Perl_croak(aTHX_ "substr outside of string"); |
83f78d1a | 2408 | oldtarglen = lvlen; |
1aa99e6b | 2409 | if (DO_UTF8(sv)) { |
1604cfb0 MS |
2410 | sv_utf8_upgrade_nomg(lsv); |
2411 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); | |
2412 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); | |
2413 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); | |
2414 | SvUTF8_on(lsv); | |
9aa983d2 | 2415 | } |
0d336106 | 2416 | else if (SvUTF8(lsv)) { |
1604cfb0 MS |
2417 | const char *utf8; |
2418 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); | |
2419 | newtarglen = len; | |
2420 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); | |
2421 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); | |
2422 | Safefree(utf8); | |
1aa99e6b | 2423 | } |
b76f3ce2 | 2424 | else { |
1604cfb0 MS |
2425 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
2426 | newtarglen = len; | |
b76f3ce2 | 2427 | } |
83f78d1a FC |
2428 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2429 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2430 | |
79072805 LW |
2431 | return 0; |
2432 | } | |
2433 | ||
2434 | int | |
864dbfa3 | 2435 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2436 | { |
7918f24d | 2437 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2438 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2439 | #ifdef NO_TAINT_SUPPORT |
2440 | PERL_UNUSED_ARG(mg); | |
2441 | #endif | |
7918f24d | 2442 | |
64ff300b | 2443 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2444 | return 0; |
2445 | } | |
2446 | ||
2447 | int | |
864dbfa3 | 2448 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2449 | { |
7918f24d | 2450 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2451 | PERL_UNUSED_ARG(sv); |
7918f24d | 2452 | |
b01e650a | 2453 | /* update taint status */ |
284167a5 | 2454 | if (TAINT_get) |
1604cfb0 | 2455 | mg->mg_len |= 1; |
b01e650a | 2456 | else |
1604cfb0 | 2457 | mg->mg_len &= ~1; |
463ee0b2 LW |
2458 | return 0; |
2459 | } | |
2460 | ||
2461 | int | |
864dbfa3 | 2462 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2463 | { |
35a4481c | 2464 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2465 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2466 | |
2467 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2468 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2469 | |
1b92e694 | 2470 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2471 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2472 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2473 | |
6ff81951 GS |
2474 | return 0; |
2475 | } | |
2476 | ||
2477 | int | |
864dbfa3 | 2478 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2479 | { |
7918f24d | 2480 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2481 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2482 | do_vecset(sv); /* XXX slurp this routine */ |
2483 | return 0; | |
2484 | } | |
2485 | ||
13733cde FC |
2486 | SV * |
2487 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2488 | { |
a0714e2c | 2489 | SV *targ = NULL; |
13733cde FC |
2490 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2491 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2492 | assert(mg); | |
5f05dabc | 2493 | if (LvTARGLEN(sv)) { |
1604cfb0 MS |
2494 | if (mg->mg_obj) { |
2495 | SV * const ahv = LvTARG(sv); | |
2496 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); | |
6d822dc4 MS |
2497 | if (he) |
2498 | targ = HeVAL(he); | |
1604cfb0 MS |
2499 | } |
2500 | else if (LvSTARGOFF(sv) >= 0) { | |
2501 | AV *const av = MUTABLE_AV(LvTARG(sv)); | |
2502 | if (LvSTARGOFF(sv) <= AvFILL(av)) | |
2503 | { | |
2504 | if (SvRMAGICAL(av)) { | |
2505 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2506 | targ = svp ? *svp : NULL; | |
2507 | } | |
2508 | else | |
2509 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; | |
2510 | } | |
2511 | } | |
2512 | if (targ && (targ != &PL_sv_undef)) { | |
2513 | /* somebody else defined it for us */ | |
2514 | SvREFCNT_dec(LvTARG(sv)); | |
2515 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); | |
2516 | LvTARGLEN(sv) = 0; | |
2517 | SvREFCNT_dec(mg->mg_obj); | |
2518 | mg->mg_obj = NULL; | |
2519 | mg->mg_flags &= ~MGf_REFCOUNTED; | |
2520 | } | |
2521 | return targ; | |
5f05dabc | 2522 | } |
71be2cbc | 2523 | else |
1604cfb0 | 2524 | return LvTARG(sv); |
13733cde FC |
2525 | } |
2526 | ||
2527 | int | |
2528 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2529 | { | |
2530 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2531 | ||
2532 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc | 2533 | return 0; |
2534 | } | |
2535 | ||
2536 | int | |
864dbfa3 | 2537 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2538 | { |
7918f24d | 2539 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2540 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2541 | if (LvTARGLEN(sv)) |
1604cfb0 | 2542 | vivify_defelem(sv); |
68dc0745 | 2543 | if (LvTARG(sv)) { |
1604cfb0 MS |
2544 | sv_setsv(LvTARG(sv), sv); |
2545 | SvSETMAGIC(LvTARG(sv)); | |
68dc0745 | 2546 | } |
5f05dabc | 2547 | return 0; |
2548 | } | |
2549 | ||
71be2cbc | 2550 | void |
864dbfa3 | 2551 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2552 | { |
74e13ce4 | 2553 | MAGIC *mg; |
a0714e2c | 2554 | SV *value = NULL; |
71be2cbc | 2555 | |
7918f24d NC |
2556 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2557 | ||
14befaf4 | 2558 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
1604cfb0 | 2559 | return; |
68dc0745 | 2560 | if (mg->mg_obj) { |
1604cfb0 MS |
2561 | SV * const ahv = LvTARG(sv); |
2562 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); | |
6d822dc4 MS |
2563 | if (he) |
2564 | value = HeVAL(he); | |
1604cfb0 MS |
2565 | if (!value || value == &PL_sv_undef) |
2566 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); | |
71be2cbc | 2567 | } |
bbfdc870 | 2568 | else if (LvSTARGOFF(sv) < 0) |
1604cfb0 | 2569 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 | 2570 | else { |
1604cfb0 MS |
2571 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
2572 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) | |
2573 | LvTARG(sv) = NULL; /* array can't be extended */ | |
2574 | else { | |
2575 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); | |
2576 | if (!svp || !(value = *svp)) | |
2577 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
2578 | } | |
68dc0745 | 2579 | } |
b37c2d43 | 2580 | SvREFCNT_inc_simple_void(value); |
68dc0745 | 2581 | SvREFCNT_dec(LvTARG(sv)); |
2582 | LvTARG(sv) = value; | |
71be2cbc | 2583 | LvTARGLEN(sv) = 0; |
68dc0745 | 2584 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2585 | mg->mg_obj = NULL; |
68dc0745 | 2586 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc | 2587 | } |
2588 | ||
2589 | int | |
1f1dcfb5 FC |
2590 | Perl_magic_setnonelem(pTHX_ SV *sv, MAGIC *mg) |
2591 | { | |
2592 | PERL_ARGS_ASSERT_MAGIC_SETNONELEM; | |
2593 | PERL_UNUSED_ARG(mg); | |
2594 | sv_unmagic(sv, PERL_MAGIC_nonelem); | |
2595 | return 0; | |
2596 | } | |
2597 | ||
2598 | int | |
864dbfa3 | 2599 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2600 | { |
7918f24d | 2601 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2602 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2603 | return 0; | |
810b8aa5 GS |
2604 | } |
2605 | ||
2606 | int | |
864dbfa3 | 2607 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2608 | { |
7918f24d | 2609 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2610 | PERL_UNUSED_CONTEXT; |
0177730e | 2611 | PERL_UNUSED_ARG(sv); |
565764a8 | 2612 | mg->mg_len = -1; |
93a17b20 LW |
2613 | return 0; |
2614 | } | |
2615 | ||
02a48966 DM |
2616 | |
2617 | int | |
2618 | Perl_magic_freemglob(pTHX_ SV *sv, MAGIC *mg) | |
2619 | { | |
2620 | PERL_ARGS_ASSERT_MAGIC_FREEMGLOB; | |
2621 | PERL_UNUSED_ARG(sv); | |
2622 | ||
5d273abb DM |
2623 | /* pos() magic uses mg_len as a string position rather than a buffer |
2624 | * length, and mg_ptr is currently unused, so skip freeing. | |
2625 | */ | |
02a48966 | 2626 | assert(mg->mg_type == PERL_MAGIC_regex_global && mg->mg_len >= -1); |
02a48966 DM |
2627 | mg->mg_ptr = NULL; |
2628 | return 0; | |
2629 | } | |
2630 | ||
2631 | ||
93a17b20 | 2632 | int |
864dbfa3 | 2633 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2634 | { |
35a4481c | 2635 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2636 | |
7918f24d NC |
2637 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2638 | ||
79072805 | 2639 | if (uf && uf->uf_set) |
1604cfb0 | 2640 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2641 | return 0; |
2642 | } | |
2643 | ||
c277df42 | 2644 | int |
faf82a0b AE |
2645 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2646 | { | |
488344d2 | 2647 | const char type = mg->mg_type; |
7918f24d NC |
2648 | |
2649 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2650 | ||
a5c7cb08 DM |
2651 | assert( type == PERL_MAGIC_fm |
2652 | || type == PERL_MAGIC_qr | |
2653 | || type == PERL_MAGIC_bm); | |
488344d2 | 2654 | return sv_unmagic(sv, type); |
faf82a0b AE |
2655 | } |
2656 | ||
7a4c00b4 | 2657 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2658 | int |
864dbfa3 | 2659 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2660 | { |
7918f24d NC |
2661 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2662 | ||
bbce6d69 | 2663 | /* |
838b5b74 | 2664 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 | 2665 | * and vanished with a faint plop. |
2666 | */ | |
96a5add6 | 2667 | PERL_UNUSED_CONTEXT; |
8772537c | 2668 | PERL_UNUSED_ARG(sv); |
7a4c00b4 | 2669 | if (mg->mg_ptr) { |
1604cfb0 MS |
2670 | Safefree(mg->mg_ptr); |
2671 | mg->mg_ptr = NULL; | |
2672 | mg->mg_len = -1; | |
7a4c00b4 | 2673 | } |
bbce6d69 | 2674 | return 0; |
2675 | } | |
a457b73c DM |
2676 | |
2677 | int | |
2678 | Perl_magic_freecollxfrm(pTHX_ SV *sv, MAGIC *mg) | |
2679 | { | |
2680 | PERL_ARGS_ASSERT_MAGIC_FREECOLLXFRM; | |
2681 | PERL_UNUSED_ARG(sv); | |
2682 | ||
2683 | /* Collate magic uses mg_len as a string length rather than a buffer | |
2684 | * length, so we need to free even with mg_len == 0: hence we can't | |
2685 | * rely on standard magic free handling */ | |
fb072d00 TC |
2686 | if (mg->mg_len >= 0) { |
2687 | assert(mg->mg_type == PERL_MAGIC_collxfrm); | |
2688 | Safefree(mg->mg_ptr); | |
2689 | mg->mg_ptr = NULL; | |
2690 | } | |
2691 | ||
a457b73c DM |
2692 | return 0; |
2693 | } | |
7a4c00b4 | 2694 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2695 | |
7e8c5dac HS |
2696 | /* Just clear the UTF-8 cache data. */ |
2697 | int | |
2698 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2699 | { | |
7918f24d | 2700 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2701 | PERL_UNUSED_CONTEXT; |
8772537c | 2702 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2703 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2704 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2705 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2706 | return 0; | |
2707 | } | |
2708 | ||
bbce6d69 | 2709 | int |
032a4919 DM |
2710 | Perl_magic_freeutf8(pTHX_ SV *sv, MAGIC *mg) |
2711 | { | |
2712 | PERL_ARGS_ASSERT_MAGIC_FREEUTF8; | |
2713 | PERL_UNUSED_ARG(sv); | |
2714 | ||
2715 | /* utf8 magic uses mg_len as a string length rather than a buffer | |
2716 | * length, so we need to free even with mg_len == 0: hence we can't | |
2717 | * rely on standard magic free handling */ | |
2718 | assert(mg->mg_type == PERL_MAGIC_utf8 && mg->mg_len >= -1); | |
2719 | Safefree(mg->mg_ptr); | |
2720 | mg->mg_ptr = NULL; | |
2721 | return 0; | |
2722 | } | |
2723 | ||
2724 | ||
2725 | int | |
9cce4f9a FC |
2726 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2727 | { | |
9782ce69 | 2728 | const char *bad = NULL; |
9cce4f9a | 2729 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2730 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2731 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2732 | case OPpLVREF_SV: | |
1604cfb0 MS |
2733 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) |
2734 | bad = " SCALAR"; | |
2735 | break; | |
9782ce69 | 2736 | case OPpLVREF_AV: |
1604cfb0 MS |
2737 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) |
2738 | bad = "n ARRAY"; | |
2739 | break; | |
9782ce69 | 2740 | case OPpLVREF_HV: |
1604cfb0 MS |
2741 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) |
2742 | bad = " HASH"; | |
2743 | break; | |
9782ce69 | 2744 | case OPpLVREF_CV: |
1604cfb0 MS |
2745 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) |
2746 | bad = " CODE"; | |
9782ce69 FC |
2747 | } |
2748 | if (bad) | |
1604cfb0 MS |
2749 | /* diag_listed_as: Assigned value is not %s reference */ |
2750 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); | |
c146a62a FC |
2751 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2752 | case 0: | |
2753 | { | |
1604cfb0 MS |
2754 | SV * const old = PAD_SV(mg->mg_len); |
2755 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2756 | SvREFCNT_dec(old); | |
2757 | break; | |
c146a62a FC |
2758 | } |
2759 | case SVt_PVGV: | |
1604cfb0 MS |
2760 | gv_setref(mg->mg_obj, sv); |
2761 | SvSETMAGIC(mg->mg_obj); | |
2762 | break; | |
6102323a | 2763 | case SVt_PVAV: |
1604cfb0 MS |
2764 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), |
2765 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
2766 | break; | |
5f94141d | 2767 | case SVt_PVHV: |
1604cfb0 | 2768 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
7fcb36d5 | 2769 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); |
c146a62a | 2770 | } |
d39c26a6 | 2771 | if (mg->mg_flags & MGf_PERSIST) |
1604cfb0 MS |
2772 | NOOP; /* This sv is in use as an iterator var and will be reused, |
2773 | so we must leave the magic. */ | |
d39c26a6 | 2774 | else |
1604cfb0 MS |
2775 | /* This sv could be returned by the assignment op, so clear the |
2776 | magic, as lvrefs are an implementation detail that must not be | |
2777 | leaked to the user. */ | |
2778 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2779 | return 0; |
2780 | } | |
2781 | ||
f1540bed JH |
2782 | static void |
2783 | S_set_dollarzero(pTHX_ SV *sv) | |
2784 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2785 | { | |
f1540bed JH |
2786 | const char *s; |
2787 | STRLEN len; | |
f1540bed JH |
2788 | #ifdef HAS_SETPROCTITLE |
2789 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2790 | * show a string from the process struct and provide | |
2791 | * the setproctitle() routine to manipulate that. */ | |
2792 | if (PL_origalen != 1) { | |
2793 | s = SvPV_const(sv, len); | |
38626956 | 2794 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2795 | /* The leading "-" removes the "perl: " prefix, |
2796 | * but not the "(perl) suffix from the ps(1) | |
2797 | * output, because that's what ps(1) shows if the | |
2798 | * argv[] is modified. */ | |
2799 | setproctitle("-%s", s); | |
2800 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2801 | /* This doesn't really work if you assume that | |
2802 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2803 | * because in ps(1) output the result will be like | |
2804 | * sprintf("perl: %s (perl)", s) | |
2805 | * I guess this is a security feature: | |
2806 | * one (a user process) cannot get rid of the original name. | |
2807 | * --jhi */ | |
2808 | setproctitle("%s", s); | |
2809 | # endif | |
2810 | } | |
2811 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2812 | if (PL_origalen != 1) { | |
2813 | union pstun un; | |
2814 | s = SvPV_const(sv, len); | |
2815 | un.pst_command = (char *)s; | |
2816 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2817 | } | |
2818 | #else | |
2819 | if (PL_origalen > 1) { | |
4f3e04fd | 2820 | I32 i; |
f1540bed JH |
2821 | /* PL_origalen is set in perl_parse(). */ |
2822 | s = SvPV_force(sv,len); | |
2823 | if (len >= (STRLEN)PL_origalen-1) { | |
2824 | /* Longer than original, will be truncated. We assume that | |
2825 | * PL_origalen bytes are available. */ | |
2826 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2827 | } | |
2828 | else { | |
2829 | /* Shorter than original, will be padded. */ | |
2830 | #ifdef PERL_DARWIN | |
2831 | /* Special case for Mac OS X: see [perl #38868] */ | |
2832 | const int pad = 0; | |
2833 | #else | |
2834 | /* Is the space counterintuitive? Yes. | |
2835 | * (You were expecting \0?) | |
2836 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2837 | * --jhi */ | |
2838 | const int pad = ' '; | |
2839 | #endif | |
2840 | Copy(s, PL_origargv[0], len, char); | |
2841 | PL_origargv[0][len] = 0; | |
2842 | memset(PL_origargv[0] + len + 1, | |
2843 | pad, PL_origalen - len - 1); | |
2844 | } | |
2845 | PL_origargv[0][PL_origalen-1] = 0; | |
2846 | for (i = 1; i < PL_origargc; i++) | |
2847 | PL_origargv[i] = 0; | |
2848 | #ifdef HAS_PRCTL_SET_NAME | |
2849 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2850 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2851 | /* diag_listed_as: SKIPME */ | |
2852 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2853 | } | |
2854 | #endif | |
2855 | } | |
2856 | #endif | |
2857 | } | |
2858 | ||
9cce4f9a | 2859 | int |
864dbfa3 | 2860 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2861 | { |
eb578fdb KW |
2862 | I32 paren; |
2863 | const REGEXP * rx; | |
79072805 | 2864 | I32 i; |
8990e307 | 2865 | STRLEN len; |
125b9982 | 2866 | MAGIC *tmg; |
2fdbfb4d | 2867 | |
7918f24d NC |
2868 | PERL_ARGS_ASSERT_MAGIC_SET; |
2869 | ||
e91d8259 | 2870 | if (!mg->mg_ptr) { |
960b831f | 2871 | paren = mg->mg_len; |
1604cfb0 | 2872 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2873 | setparen_got_rx: |
fb15da9c | 2874 | CALLREG_NUMBUF_STORE((REGEXP *)rx,paren,sv); |
1604cfb0 | 2875 | } else { |
2fdbfb4d AB |
2876 | /* Croak with a READONLY error when a numbered match var is |
2877 | * set without a previous pattern match. Unless it's C<local $1> | |
2878 | */ | |
e91d8259 | 2879 | croakparen: |
2fdbfb4d | 2880 | if (!PL_localizing) { |
cb077ed2 | 2881 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2882 | } |
2883 | } | |
e91d8259 NC |
2884 | return 0; |
2885 | } | |
2886 | ||
2887 | switch (*mg->mg_ptr) { | |
748a9306 | 2888 | case '\001': /* ^A */ |
1604cfb0 MS |
2889 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2890 | else SvOK_off(PL_bodytarget); | |
2891 | FmLINES(PL_bodytarget) = 0; | |
2892 | if (SvPOK(PL_bodytarget)) { | |
2893 | char *s = SvPVX(PL_bodytarget); | |
0687887e | 2894 | char *e = SvEND(PL_bodytarget); |
1604cfb0 MS |
2895 | while ( ((s = (char *) memchr(s, '\n', e - s))) ) { |
2896 | FmLINES(PL_bodytarget)++; | |
2897 | s++; | |
2898 | } | |
2899 | } | |
2900 | /* mg_set() has temporarily made sv non-magical */ | |
2901 | if (TAINTING_get) { | |
2902 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) | |
2903 | SvTAINTED_on(PL_bodytarget); | |
2904 | else | |
2905 | SvTAINTED_off(PL_bodytarget); | |
2906 | } | |
2907 | break; | |
49460fe6 | 2908 | case '\003': /* ^C */ |
1604cfb0 MS |
2909 | PL_minus_c = cBOOL(SvIV(sv)); |
2910 | break; | |
49460fe6 | 2911 | |
79072805 | 2912 | case '\004': /* ^D */ |
b4ab917c | 2913 | #ifdef DEBUGGING |
a9e2d2bf DM |
2914 | { |
2915 | const char *s = SvPV_nolen_const(sv); | |
2916 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2917 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2918 | dump_all_perl(!DEBUG_B_TEST); | |
2919 | } | |
b4ab917c | 2920 | #else |
1604cfb0 | 2921 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2922 | #endif |
1604cfb0 | 2923 | break; |
28f23441 | 2924 | case '\005': /* ^E */ |
1604cfb0 | 2925 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2926 | #ifdef VMS |
1604cfb0 | 2927 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2928 | #elif defined(WIN32) |
1604cfb0 | 2929 | SetLastError( SvIV(sv) ); |
2abc681d | 2930 | #elif defined(OS2) |
1604cfb0 | 2931 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2932 | #else |
1604cfb0 MS |
2933 | /* will anyone ever use this? */ |
2934 | SETERRNO(SvIV(sv), 4); | |
22fae026 | 2935 | #endif |
1604cfb0 MS |
2936 | } |
2937 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) | |
fd503f5c | 2938 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); |
1604cfb0 | 2939 | break; |
79072805 | 2940 | case '\006': /* ^F */ |
9f601cf3 TC |
2941 | if (mg->mg_ptr[1] == '\0') { |
2942 | PL_maxsysfd = SvIV(sv); | |
2943 | } | |
1604cfb0 | 2944 | break; |
a0d0e21e | 2945 | case '\010': /* ^H */ |
efa571ab KW |
2946 | { |
2947 | U32 save_hints = PL_hints; | |
5d382c25 | 2948 | PL_hints = SvUV(sv); |
efa571ab KW |
2949 | |
2950 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2951 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2952 | notify_parser_that_changed_to_utf8(); | |
2953 | } | |
2954 | } | |
1604cfb0 | 2955 | break; |
9d116dd7 | 2956 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
1604cfb0 MS |
2957 | Safefree(PL_inplace); |
2958 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; | |
2959 | break; | |
d9bad346 | 2960 | case '\016': /* ^N */ |
1604cfb0 MS |
2961 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) |
2962 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2963 | goto croakparen; | |
28f23441 | 2964 | case '\017': /* ^O */ |
1604cfb0 MS |
2965 | if (*(mg->mg_ptr+1) == '\0') { |
2966 | Safefree(PL_osname); | |
2967 | PL_osname = NULL; | |
2968 | if (SvOK(sv)) { | |
2969 | TAINT_PROPER("assigning to $^O"); | |
2970 | PL_osname = savesvpv(sv); | |
2971 | } | |
2972 | } | |
2973 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
2974 | STRLEN len; | |
2975 | const char *const start = SvPV(sv, len); | |
2976 | const char *out = (const char*)memchr(start, '\0', len); | |
2977 | SV *tmp; | |
2978 | ||
2979 | ||
2980 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
2981 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
2982 | ||
2983 | /* Opening for input is more common than opening for output, so | |
2984 | ensure that hints for input are sooner on linked list. */ | |
2985 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, | |
2986 | SvUTF8(sv)) | |
2987 | : newSVpvs_flags("", SvUTF8(sv)); | |
2988 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2989 | mg_set(tmp); | |
2990 | ||
2991 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, | |
2992 | SvUTF8(sv)); | |
2993 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2994 | mg_set(tmp); | |
2995 | } | |
2996 | break; | |
79072805 | 2997 | case '\020': /* ^P */ |
2fdbfb4d AB |
2998 | PL_perldb = SvIV(sv); |
2999 | if (PL_perldb && !PL_DBsingle) | |
3000 | init_debugger(); | |
9b9e0be4 | 3001 | break; |
79072805 | 3002 | case '\024': /* ^T */ |
88e89b8a | 3003 | #ifdef BIG_TIME |
1604cfb0 | 3004 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 3005 | #else |
1604cfb0 | 3006 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 3007 | #endif |
1604cfb0 | 3008 | break; |
e07ea26a | 3009 | case '\025': /* ^UTF8CACHE */ |
1604cfb0 MS |
3010 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { |
3011 | PL_utf8cache = (signed char) sv_2iv(sv); | |
3012 | } | |
3013 | break; | |
fde18df1 | 3014 | case '\027': /* ^W & $^WARNING_BITS */ |
1604cfb0 MS |
3015 | if (*(mg->mg_ptr+1) == '\0') { |
3016 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
3017 | i = SvIV(sv); | |
3018 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) | |
3019 | | (i ? G_WARN_ON : G_WARN_OFF) ; | |
3020 | } | |
3021 | } | |
3022 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { | |
3023 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
3024 | if (!SvPOK(sv)) { | |
e6421d31 | 3025 | free_and_set_cop_warnings(&PL_compiling, pWARN_STD); |
1604cfb0 MS |
3026 | break; |
3027 | } | |
3028 | { | |
3029 | STRLEN len, i; | |
3030 | int not_none = 0, not_all = 0; | |
3031 | const U8 * const ptr = (const U8 *)SvPV_const(sv, len) ; | |
3032 | for (i = 0 ; i < len ; ++i) { | |
3033 | not_none |= ptr[i]; | |
3034 | not_all |= ptr[i] ^ 0x55; | |
3035 | } | |
3036 | if (!not_none) { | |
e6421d31 | 3037 | free_and_set_cop_warnings(&PL_compiling, pWARN_NONE); |
1604cfb0 | 3038 | } else if (len >= WARNsize && !not_all) { |
e6421d31 YO |
3039 | free_and_set_cop_warnings(&PL_compiling, pWARN_ALL); |
3040 | PL_dowarn |= G_WARN_ONCE ; | |
3041 | } | |
3042 | else { | |
3043 | STRLEN len; | |
3044 | const char *const p = SvPV_const(sv, len); | |
94c8b9c1 | 3045 | |
6848aea2 YO |
3046 | free_and_set_cop_warnings( |
3047 | &PL_compiling, | |
3048 | Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, | |
3049 | p, len) | |
3050 | ); | |
72dc9ed5 | 3051 | |
e6421d31 | 3052 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
1604cfb0 | 3053 | PL_dowarn |= G_WARN_ONCE ; |
e6421d31 | 3054 | } |
1604cfb0 MS |
3055 | } |
3056 | } | |
3057 | } | |
3058 | break; | |
79072805 | 3059 | case '.': |
1604cfb0 MS |
3060 | if (PL_localizing) { |
3061 | if (PL_localizing == 1) | |
3062 | SAVESPTR(PL_last_in_gv); | |
3063 | } | |
3064 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) | |
3065 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); | |
3066 | break; | |
79072805 | 3067 | case '^': |
1604cfb0 MS |
3068 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
3069 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); | |
3070 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); | |
3071 | break; | |
79072805 | 3072 | case '~': |
1604cfb0 MS |
3073 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
3074 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); | |
3075 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); | |
3076 | break; | |
79072805 | 3077 | case '=': |
1604cfb0 MS |
3078 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3079 | break; | |
79072805 | 3080 | case '-': |
1604cfb0 MS |
3081 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3082 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
3083 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; | |
3084 | break; | |
79072805 | 3085 | case '%': |
1604cfb0 MS |
3086 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3087 | break; | |
79072805 | 3088 | case '|': |
1604cfb0 MS |
3089 | { |
3090 | IO * const io = GvIO(PL_defoutgv); | |
3091 | if(!io) | |
3092 | break; | |
3093 | if ((SvIV(sv)) == 0) | |
3094 | IoFLAGS(io) &= ~IOf_FLUSH; | |
3095 | else { | |
3096 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
3097 | PerlIO *ofp = IoOFP(io); | |
3098 | if (ofp) | |
3099 | (void)PerlIO_flush(ofp); | |
3100 | IoFLAGS(io) |= IOf_FLUSH; | |
3101 | } | |
3102 | } | |
3103 | } | |
3104 | break; | |
79072805 | 3105 | case '/': |
1ab48e3a | 3106 | { |
1ab48e3a | 3107 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3108 | SV *referent = SvRV(sv); |
3109 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3110 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3111 | * the alternative is to copy pretty much the entire | |
3112 | * sv_reftype() into this routine, or to do a full string | |
3113 | * comparison on the return of sv_reftype() both of which | |
3114 | * make me feel worse! NOTE, do not modify this comment | |
3115 | * without reviewing the corresponding comment in | |
3116 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3117 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3118 | IV val = SvIV(referent); |
1ab48e3a | 3119 | if (val <= 0) { |
520b6fb6 DIM |
3120 | sv_setsv(sv, PL_rs); |
3121 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3122 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3123 | } |
3124 | } else { | |
ddce084a | 3125 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3126 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3127 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3128 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3129 | } |
3130 | } | |
b3a2acfa | 3131 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3132 | PL_rs = newSVsv(sv); |
b3a2acfa | 3133 | } |
1604cfb0 | 3134 | break; |
79072805 | 3135 | case '\\': |
1604cfb0 MS |
3136 | SvREFCNT_dec(PL_ors_sv); |
3137 | if (SvOK(sv)) { | |
3138 | PL_ors_sv = newSVsv(sv); | |
3139 | } | |
3140 | else { | |
3141 | PL_ors_sv = NULL; | |
3142 | } | |
3143 | break; | |
7d69d4a6 | 3144 | case '[': |
1604cfb0 MS |
3145 | if (SvIV(sv) != 0) |
3146 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3147 | break; | |
79072805 | 3148 | case '?': |
ff0cee69 | 3149 | #ifdef COMPLEX_STATUS |
1604cfb0 MS |
3150 | if (PL_localizing == 2) { |
3151 | SvUPGRADE(sv, SVt_PVLV); | |
3152 | PL_statusvalue = LvTARGOFF(sv); | |
3153 | PL_statusvalue_vms = LvTARGLEN(sv); | |
3154 | } | |
3155 | else | |
ff0cee69 | 3156 | #endif |
3157 | #ifdef VMSISH_STATUS | |
1604cfb0 MS |
3158 | if (VMSISH_STATUS) |
3159 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); | |
3160 | else | |
ff0cee69 | 3161 | #endif |
1604cfb0 MS |
3162 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
3163 | break; | |
79072805 | 3164 | case '!': |
93189314 JH |
3165 | { |
3166 | #ifdef VMS | |
3167 | # define PERL_VMS_BANG vaxc$errno | |
3168 | #else | |
3169 | # define PERL_VMS_BANG 0 | |
3170 | #endif | |
79c32fc2 | 3171 | #if defined(WIN32) |
1604cfb0 MS |
3172 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3173 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
c9beaf97 | 3174 | #else |
1604cfb0 MS |
3175 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
3176 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
c9beaf97 | 3177 | #endif |
1604cfb0 MS |
3178 | } |
3179 | break; | |
79072805 | 3180 | case '<': |
1604cfb0 | 3181 | { |
b469f1e0 | 3182 | /* XXX $< currently silently ignores failures */ |
1604cfb0 MS |
3183 | const Uid_t new_uid = SvUID(sv); |
3184 | PL_delaymagic_uid = new_uid; | |
3185 | if (PL_delaymagic) { | |
3186 | PL_delaymagic |= DM_RUID; | |
3187 | break; /* don't do magic till later */ | |
3188 | } | |
79072805 | 3189 | #ifdef HAS_SETRUID |
1604cfb0 | 3190 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3191 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3192 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3193 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3194 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3195 | #else |
1604cfb0 | 3196 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3197 | # ifdef PERL_DARWIN |
1604cfb0 MS |
3198 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
3199 | if (new_uid != 0 && PerlProc_getuid() == 0) | |
b469f1e0 | 3200 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3201 | # endif |
b469f1e0 | 3202 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
1604cfb0 MS |
3203 | } else { |
3204 | Perl_croak(aTHX_ "setruid() not implemented"); | |
3205 | } | |
79072805 | 3206 | #endif |
1604cfb0 MS |
3207 | break; |
3208 | } | |
79072805 | 3209 | case '>': |
1604cfb0 | 3210 | { |
b469f1e0 | 3211 | /* XXX $> currently silently ignores failures */ |
1604cfb0 MS |
3212 | const Uid_t new_euid = SvUID(sv); |
3213 | PL_delaymagic_euid = new_euid; | |
3214 | if (PL_delaymagic) { | |
3215 | PL_delaymagic |= DM_EUID; | |
3216 | break; /* don't do magic till later */ | |
3217 | } | |
79072805 | 3218 | #ifdef HAS_SETEUID |
1604cfb0 | 3219 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3220 | #elif defined(HAS_SETREUID) |
1604cfb0 | 3221 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3222 | #elif defined(HAS_SETRESUID) |
1604cfb0 | 3223 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3224 | #else |
1604cfb0 MS |
3225 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
3226 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); | |
3227 | else { | |
3228 | Perl_croak(aTHX_ "seteuid() not implemented"); | |
3229 | } | |
3230 | #endif | |
3231 | break; | |
3232 | } | |
79072805 | 3233 | case '(': |
1604cfb0 | 3234 | { |
b469f1e0 | 3235 | /* XXX $( currently silently ignores failures */ |
1604cfb0 MS |
3236 | const Gid_t new_gid = SvGID(sv); |
3237 | PL_delaymagic_gid = new_gid; | |
3238 | if (PL_delaymagic) { | |
3239 | PL_delaymagic |= DM_RGID; | |
3240 | break; /* don't do magic till later */ | |
3241 | } | |
79072805 | 3242 | #ifdef HAS_SETRGID |
1604cfb0 | 3243 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3244 | #elif defined(HAS_SETREGID) |
1604cfb0 | 3245 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3246 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3247 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3248 | #else |
1604cfb0 MS |
3249 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
3250 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); | |
3251 | else { | |
3252 | Perl_croak(aTHX_ "setrgid() not implemented"); | |
3253 | } | |
3254 | #endif | |
3255 | break; | |
3256 | } | |
79072805 | 3257 | case ')': |
1604cfb0 | 3258 | { |
0635704a HS |
3259 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3260 | * but you can override it if you need to. | |
3261 | */ | |
3262 | #ifndef INVALID_GID | |
3263 | #define INVALID_GID ((Gid_t)-1) | |
3264 | #endif | |
b469f1e0 | 3265 | /* XXX $) currently silently ignores failures */ |
1604cfb0 | 3266 | Gid_t new_egid; |
5cd24f17 | 3267 | #ifdef HAS_SETGROUPS |
1604cfb0 MS |
3268 | { |
3269 | const char *p = SvPV_const(sv, len); | |
757f63d8 | 3270 | Groups_t *gary = NULL; |
79e302e6 MM |
3271 | const char* p_end = p + len; |
3272 | const char* endptr = p_end; | |
22ff3130 | 3273 | UV uv; |
fb4089e0 | 3274 | #ifdef _SC_NGROUPS_MAX |
3275 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3276 | ||
3277 | if (maxgrp < 0) | |
3278 | maxgrp = NGROUPS; | |
3279 | #else | |
3280 | int maxgrp = NGROUPS; | |
3281 | #endif | |
757f63d8 SP |
3282 | |
3283 | while (isSPACE(*p)) | |
3284 | ++p; | |
22ff3130 HS |
3285 | if (grok_atoUV(p, &uv, &endptr)) |
3286 | new_egid = (Gid_t)uv; | |
3287 | else { | |
0635704a | 3288 | new_egid = INVALID_GID; |
22ff3130 HS |
3289 | endptr = NULL; |
3290 | } | |
fb4089e0 | 3291 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3292 | if (endptr == NULL) |
3293 | break; | |
3294 | p = endptr; | |
79e302e6 | 3295 | endptr = p_end; |
757f63d8 SP |
3296 | while (isSPACE(*p)) |
3297 | ++p; | |
3298 | if (!*p) | |
3299 | break; | |
fdadaf77 | 3300 | if (!gary) |
757f63d8 SP |
3301 | Newx(gary, i + 1, Groups_t); |
3302 | else | |
3303 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3304 | if (grok_atoUV(p, &uv, &endptr)) |
3305 | gary[i] = (Groups_t)uv; | |
3306 | else { | |
0635704a | 3307 | gary[i] = INVALID_GID; |
22ff3130 HS |
3308 | endptr = NULL; |
3309 | } | |
757f63d8 SP |
3310 | } |
3311 | if (i) | |
b469f1e0 | 3312 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
1604cfb0 MS |
3313 | Safefree(gary); |
3314 | } | |
5cd24f17 | 3315 | #else /* HAS_SETGROUPS */ |
dfff4baf | 3316 | new_egid = SvGID(sv); |
5cd24f17 | 3317 | #endif /* HAS_SETGROUPS */ |
1604cfb0 MS |
3318 | PL_delaymagic_egid = new_egid; |
3319 | if (PL_delaymagic) { | |
3320 | PL_delaymagic |= DM_EGID; | |
3321 | break; /* don't do magic till later */ | |
3322 | } | |
79072805 | 3323 | #ifdef HAS_SETEGID |
1604cfb0 | 3324 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3325 | #elif defined(HAS_SETREGID) |
1604cfb0 | 3326 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3327 | #elif defined(HAS_SETRESGID) |
1604cfb0 | 3328 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3329 | #else |
1604cfb0 MS |
3330 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
3331 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); | |
3332 | else { | |
3333 | Perl_croak(aTHX_ "setegid() not implemented"); | |
3334 | } | |
3335 | #endif | |
3336 | break; | |
3337 | } | |
79072805 | 3338 | case ':': |
1604cfb0 MS |
3339 | PL_chopset = SvPV_force(sv,len); |
3340 | break; | |
9cdac2a2 | 3341 | case '$': /* $$ */ |
1604cfb0 MS |
3342 | /* Store the pid in mg->mg_obj so we can tell when a fork has |
3343 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3344 | if (isGV(mg->mg_obj)) { | |
3345 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3346 | SvREFCNT_dec(mg->mg_obj); | |
3347 | mg->mg_flags |= MGf_REFCOUNTED; | |
3348 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3349 | } | |
3350 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3351 | break; | |
79072805 | 3352 | case '0': |
2d3b3561 FG |
3353 | if (!sv_utf8_downgrade(sv, /* fail_ok */ TRUE)) { |
3354 | ||
3355 | /* Since we are going to set the string's UTF8-encoded form | |
3356 | as the process name we should update $0 itself to contain | |
3357 | that same (UTF8-encoded) value. */ | |
3358 | sv_utf8_encode(GvSV(mg->mg_obj)); | |
3359 | ||
3360 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "$0"); | |
3361 | } | |
3362 | ||
1604cfb0 | 3363 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3364 | S_set_dollarzero(aTHX_ sv); |
1604cfb0 MS |
3365 | UNLOCK_DOLLARZERO_MUTEX; |
3366 | break; | |
79072805 LW |
3367 | } |
3368 | return 0; | |
3369 | } | |
3370 | ||
ea81552b | 3371 | /* |
3f620621 | 3372 | =for apidoc_section $signals |
ea81552b KW |
3373 | =for apidoc whichsig |
3374 | =for apidoc_item whichsig_pv | |
3375 | =for apidoc_item whichsig_pvn | |
3376 | =for apidoc_item whichsig_sv | |
3377 | ||
3378 | These all convert a signal name into its corresponding signal number; | |
3379 | returning -1 if no corresponding number was found. | |
3380 | ||
3381 | They differ only in the source of the signal name: | |
3382 | ||
3383 | C<whichsig_pv> takes the name from the C<NUL>-terminated string starting at | |
3384 | C<sig>. | |
3385 | ||
3386 | C<whichsig> is merely a different spelling, a synonym, of C<whichsig_pv>. | |
3387 | ||
3388 | C<whichsig_pvn> takes the name from the string starting at C<sig>, with length | |
3389 | C<len> bytes. | |
3390 | ||
3391 | C<whichsig_sv> takes the name from the PV stored in the SV C<sigsv>. | |
3392 | ||
3393 | =cut | |
3394 | */ | |
3395 | ||
79072805 | 3396 | I32 |
84c7b88c BF |
3397 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3398 | { | |
3399 | const char *sigpv; | |
3400 | STRLEN siglen; | |
3401 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3402 | sigpv = SvPV_const(sigsv, siglen); |
3403 | return whichsig_pvn(sigpv, siglen); | |
3404 | } | |
3405 | ||
3406 | I32 | |
3407 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3408 | { | |
3409 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3410 | return whichsig_pvn(sig, strlen(sig)); |
3411 | } | |
3412 | ||
3413 | I32 | |
3414 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3415 | { |
eb578fdb | 3416 | char* const* sigv; |
7918f24d | 3417 | |
84c7b88c | 3418 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3419 | PERL_UNUSED_CONTEXT; |
79072805 | 3420 | |
aadb217d | 3421 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
1604cfb0 MS |
3422 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
3423 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; | |
79072805 | 3424 | #ifdef SIGCLD |
84c7b88c | 3425 | if (memEQs(sig, len, "CHLD")) |
1604cfb0 | 3426 | return SIGCLD; |
79072805 LW |
3427 | #endif |
3428 | #ifdef SIGCHLD | |
84c7b88c | 3429 | if (memEQs(sig, len, "CLD")) |
1604cfb0 | 3430 | return SIGCHLD; |
79072805 | 3431 | #endif |
7f1236c0 | 3432 | return -1; |
79072805 LW |
3433 | } |
3434 | ||
dc37125b DM |
3435 | |
3436 | /* Perl_sighandler(), Perl_sighandler1(), Perl_sighandler3(): | |
3437 | * these three function are intended to be called by the OS as 'C' level | |
3438 | * signal handler functions in the case where unsafe signals are being | |
3439 | * used - i.e. they immediately invoke Perl_perly_sighandler() to call the | |
3440 | * perl-level sighandler, rather than deferring. | |
3441 | * In fact, the core itself will normally use Perl_csighandler as the | |
3442 | * OS-level handler; that function will then decide whether to queue the | |
3443 | * signal or call Perl_sighandler / Perl_perly_sighandler itself. So these | |
3444 | * functions are more useful for e.g. POSIX.xs when it wants explicit | |
3445 | * control of what's happening. | |
3446 | */ | |
3447 | ||
3448 | ||
5e7940ce | 3449 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b DM |
3450 | |
3451 | Signal_t | |
e7124897 | 3452 | Perl_sighandler(int sig, Siginfo_t *sip, void *uap) |
8a5e470b DM |
3453 | { |
3454 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3455 | } | |
3456 | ||
1e82f5a6 | 3457 | #else |
8a5e470b DM |
3458 | |
3459 | Signal_t | |
1e82f5a6 | 3460 | Perl_sighandler(int sig) |
8a5e470b DM |
3461 | { |
3462 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3463 | } | |
3464 | ||
1e82f5a6 | 3465 | #endif |
8a5e470b | 3466 | |
dc37125b DM |
3467 | Signal_t |
3468 | Perl_sighandler1(int sig) | |
3469 | { | |
3470 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3471 | } | |
3472 | ||
3473 | Signal_t | |
3474 | Perl_sighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
3475 | { | |
3476 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3477 | } | |
3478 | ||
3479 | ||
8a5e470b DM |
3480 | /* Invoke the perl-level signal handler. This function is called either |
3481 | * directly from one of the C-level signals handlers (Perl_sighandler or | |
3482 | * Perl_csighandler), or for safe signals, later from | |
3483 | * Perl_despatch_signals() at a suitable safe point during execution. | |
3484 | * | |
3485 | * 'safe' is a boolean indicating the latter call path. | |
3486 | */ | |
3487 | ||
3488 | Signal_t | |
3489 | Perl_perly_sighandler(int sig, Siginfo_t *sip PERL_UNUSED_DECL, | |
3490 | void *uap PERL_UNUSED_DECL, bool safe) | |
79072805 | 3491 | { |
1018e26f NIS |
3492 | #ifdef PERL_GET_SIG_CONTEXT |
3493 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3494 | #else |
cea2e8a9 | 3495 | dTHX; |
71d280e3 | 3496 | #endif |
79072805 | 3497 | dSP; |
a0714e2c SS |
3498 | GV *gv = NULL; |
3499 | SV *sv = NULL; | |
8772537c | 3500 | SV * const tSv = PL_Sv; |
601f1833 | 3501 | CV *cv = NULL; |
533c011a | 3502 | OP *myop = PL_op; |
84902520 | 3503 | U32 flags = 0; |
8772537c | 3504 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3505 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3506 | SV *errsv_save = NULL; |
71d280e3 | 3507 | |
84902520 | 3508 | |
727405f8 | 3509 | if (!PL_psig_ptr[sig]) { |
1604cfb0 MS |
3510 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
3511 | PL_sig_name[sig]); | |
3512 | exit(sig); | |
3513 | } | |
ff0cee69 | 3514 | |
a0d63a7b | 3515 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
1604cfb0 MS |
3516 | /* Max number of items pushed there is 3*n or 4. We cannot fix |
3517 | infinity, so we fix 4 (in fact 5): */ | |
3518 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3519 | flags |= 1; | |
3520 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3521 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3522 | } | |
84902520 | 3523 | } |
84902520 | 3524 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3525 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
1604cfb0 MS |
3526 | || SvTYPE(cv) != SVt_PVCV) { |
3527 | HV *st; | |
3528 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); | |
8772537c | 3529 | } |
84902520 | 3530 | |
a0d0e21e | 3531 | if (!cv || !CvROOT(cv)) { |
1604cfb0 MS |
3532 | const HEK * const hek = gv |
3533 | ? GvENAME_HEK(gv) | |
3534 | : cv && CvNAMED(cv) | |
3535 | ? CvNAME_HEK(cv) | |
3536 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; | |
3537 | if (hek) | |
3538 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3539 | "SIG%s handler \"%" HEKf "\" not defined.\n", | |
3540 | PL_sig_name[sig], HEKfARG(hek)); | |
3541 | /* diag_listed_as: SIG%s handler "%s" not defined */ | |
3542 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3543 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3544 | PL_sig_name[sig]); | |
3545 | goto cleanup; | |
79072805 LW |
3546 | } |
3547 | ||
0c4d3b5e | 3548 | sv = PL_psig_name[sig] |
1604cfb0 MS |
3549 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) |
3550 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3551 | flags |= 8; |
0c4d3b5e DM |
3552 | SAVEFREESV(sv); |
3553 | ||
a0d63a7b | 3554 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
1604cfb0 MS |
3555 | /* make sure our assumption about the size of the SAVEs are correct: |
3556 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3557 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
a0d63a7b | 3558 | } |
e336de0d | 3559 | |
e788e7d3 | 3560 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3561 | PUSHMARK(SP); |
79072805 | 3562 | PUSHs(sv); |
dc43527e | 3563 | |
8aad04aa JH |
3564 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3565 | { | |
1604cfb0 | 3566 | struct sigaction oact; |
8aad04aa | 3567 | |
1604cfb0 | 3568 | if (sip && sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { |
dc43527e DM |
3569 | HV *sih = newHV(); |
3570 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); | |
3571 | /* The siginfo fields signo, code, errno, pid, uid, | |
3572 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
3573 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); | |
3574 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
3575 | # ifdef HAS_SIGINFO_SI_ERRNO | |
3576 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3577 | # endif | |
3578 | # ifdef HAS_SIGINFO_SI_STATUS | |
3579 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3580 | # endif | |
3581 | # ifdef HAS_SIGINFO_SI_UID | |
3582 | { | |
3583 | SV *uid = newSV(0); | |
3584 | sv_setuid(uid, sip->si_uid); | |
3585 | (void)hv_stores(sih, "uid", uid); | |
3586 | } | |
3587 | # endif | |
3588 | # ifdef HAS_SIGINFO_SI_PID | |
3589 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3590 | # endif | |
3591 | # ifdef HAS_SIGINFO_SI_ADDR | |
3592 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3593 | # endif | |
3594 | # ifdef HAS_SIGINFO_SI_BAND | |
3595 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
3596 | # endif | |
3597 | EXTEND(SP, 2); | |
3598 | PUSHs(rv); | |
3599 | mPUSHp((char *)sip, sizeof(*sip)); | |
b4552a27 | 3600 | |
1604cfb0 | 3601 | } |
8aad04aa JH |
3602 | } |
3603 | #endif | |
dc43527e | 3604 | |
79072805 | 3605 | PUTBACK; |
a0d0e21e | 3606 | |
100c03aa JL |
3607 | errsv_save = newSVsv(ERRSV); |
3608 | ||
ad64d0ec | 3609 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3610 | |
d3acc0f7 | 3611 | POPSTACK; |
eed484f9 | 3612 | { |
1604cfb0 MS |
3613 | SV * const errsv = ERRSV; |
3614 | if (SvTRUE_NN(errsv)) { | |
3615 | SvREFCNT_dec(errsv_save); | |
dc43527e | 3616 | |
c22d665b | 3617 | #ifndef PERL_MICRO |
dc43527e DM |
3618 | /* Handler "died", for example to get out of a restart-able read(). |
3619 | * Before we re-do that on its behalf re-enable the signal which was | |
3620 | * blocked by the system when we entered. | |
3621 | */ | |
3622 | # ifdef HAS_SIGPROCMASK | |
1604cfb0 | 3623 | if (!safe) { |
8a5e470b DM |
3624 | /* safe signals called via dispatch_signals() set up a |
3625 | * savestack destructor, unblock_sigmask(), to | |
3626 | * automatically unblock the handler at the end. If | |
3627 | * instead we get here directly, we have to do it | |
3628 | * ourselves | |
3629 | */ | |
1604cfb0 MS |
3630 | sigset_t set; |
3631 | sigemptyset(&set); | |
3632 | sigaddset(&set,sig); | |
3633 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3634 | } | |
dc43527e | 3635 | # else |
1604cfb0 | 3636 | /* Not clear if this will work */ |
8a5e470b DM |
3637 | /* XXX not clear if this should be protected by 'if (safe)' |
3638 | * too */ | |
3639 | ||
1604cfb0 MS |
3640 | (void)rsignal(sig, SIG_IGN); |
3641 | (void)rsignal(sig, PL_csighandlerp); | |
dc43527e | 3642 | # endif |
c22d665b | 3643 | #endif /* !PERL_MICRO */ |
dc43527e | 3644 | |
1604cfb0 MS |
3645 | die_sv(errsv); |
3646 | } | |
3647 | else { | |
3648 | sv_setsv(errsv, errsv_save); | |
3649 | SvREFCNT_dec(errsv_save); | |
3650 | } | |
100c03aa JL |
3651 | } |
3652 | ||
7b52d656 | 3653 | cleanup: |
0c4d3b5e DM |
3654 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3655 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3656 | if (flags & 8) |
1604cfb0 | 3657 | SvREFCNT_dec_NN(sv); |
533c011a | 3658 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3659 | |
3280af22 NIS |
3660 | PL_Sv = tSv; /* Restore global temporaries. */ |
3661 | PL_Xpv = tXpv; | |
53bb94e2 | 3662 | return; |
79072805 | 3663 | } |
4e35701f NIS |
3664 | |
3665 | ||
51371543 | 3666 | static void |
8772537c | 3667 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3668 | { |
8772537c AL |
3669 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3670 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3671 | bool bumped; |
51371543 GS |
3672 | |
3673 | if (!sv) | |
3674 | return; | |
3675 | ||
4bac9ae4 | 3676 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
1604cfb0 MS |
3677 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ |
3678 | if (mgs->mgs_flags) | |
3679 | SvFLAGS(sv) |= mgs->mgs_flags; | |
3680 | else | |
3681 | mg_magical(sv); | |
51371543 GS |
3682 | } |
3683 | ||
150b625d | 3684 | bumped = mgs->mgs_bumped; |
51371543 GS |
3685 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3686 | ||
3687 | /* If we're still on top of the stack, pop us off. (That condition | |
3688 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3689 | * if it's being called via leave_scope.) | |
3690 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3691 | * may leave alloc gunk on the savestack, and some code | |
3692 | * (e.g. sighandler) doesn't expect that... | |
3693 | */ | |
3694 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3695 | { | |
1604cfb0 | 3696 | UV popval = SSPOPUV; |
1be36ce0 | 3697 | assert(popval == SAVEt_DESTRUCTOR_X); |
51371543 | 3698 | PL_savestack_ix -= 2; |
1604cfb0 | 3699 | popval = SSPOPUV; |
1be36ce0 NC |
3700 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); |
3701 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3702 | } |
150b625d | 3703 | if (bumped) { |
1604cfb0 MS |
3704 | if (SvREFCNT(sv) == 1) { |
3705 | /* We hold the last reference to this SV, which implies that the | |
3706 | SV was deleted as a side effect of the routines we called. | |
3707 | So artificially keep it alive a bit longer. | |
3708 | We avoid turning on the TEMP flag, which can cause the SV's | |
3709 | buffer to get stolen (and maybe other stuff). */ | |
3710 | sv_2mortal(sv); | |
3711 | SvTEMP_off(sv); | |
3712 | } | |
3713 | else | |
3714 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ | |
8985fe98 | 3715 | } |
51371543 GS |
3716 | } |
3717 | ||
0c4d3b5e DM |
3718 | /* clean up the mess created by Perl_sighandler(). |
3719 | * Note that this is only called during an exit in a signal handler; | |
3720 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3721 | * skipped over. */ |
0c4d3b5e | 3722 | |
51371543 | 3723 | static void |
8772537c | 3724 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3725 | { |
0c4d3b5e | 3726 | PERL_UNUSED_ARG(p); |
7918f24d | 3727 | |
0c4d3b5e | 3728 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3729 | } |
1018e26f | 3730 | |
66610fdd | 3731 | /* |
3f620621 | 3732 | =for apidoc_section $magic |
b3ca2e83 NC |
3733 | =for apidoc magic_sethint |
3734 | ||
796b6530 | 3735 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3736 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3737 | anything that would need a deep copy. Maybe we should warn if we find a | |
3738 | reference. | |
b3ca2e83 NC |
3739 | |
3740 | =cut | |
3741 | */ | |
3742 | int | |
3743 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3744 | { | |
ad64d0ec | 3745 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
1604cfb0 | 3746 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3747 | |
7918f24d NC |
3748 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3749 | ||
e6e3e454 NC |
3750 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3751 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3752 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3753 | or take other more complex action. */ | |
3754 | ||
5b9c0671 NC |
3755 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3756 | Doing this here saves a lot of doing it manually in perl code (and | |
3757 | forgetting to do it, and consequent subtle errors. */ | |
3758 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 | 3759 | CopHINTHASH_set(&PL_compiling, |
1604cfb0 | 3760 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); |
b34c1a7e | 3761 | magic_sethint_feature(key, NULL, 0, sv, 0); |
b3ca2e83 NC |
3762 | return 0; |
3763 | } | |
3764 | ||
3765 | /* | |
f175cff5 | 3766 | =for apidoc magic_clearhint |
b3ca2e83 | 3767 | |
796b6530 | 3768 | Triggered by a delete from C<%^H>, records the key to |
c28fe1ec | 3769 | C<PL_compiling.cop_hints_hash>. |
b3ca2e83 NC |
3770 | |
3771 | =cut | |
3772 | */ | |
3773 | int | |
3774 | Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg) | |
3775 | { | |
7918f24d | 3776 | PERL_ARGS_ASSERT_MAGIC_CLEARHINT; |
f5a63d97 AL |
3777 | PERL_UNUSED_ARG(sv); |
3778 | ||
5b9c0671 | 3779 | PL_hints |= HINT_LOCALIZE_HH; |
20439bc7 | 3780 | CopHINTHASH_set(&PL_compiling, |
1604cfb0 MS |
3781 | mg->mg_len == HEf_SVKEY |
3782 | ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling), | |
3783 | MUTABLE_SV(mg->mg_ptr), 0, 0) | |
3784 | : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling), | |
3785 | mg->mg_ptr, mg->mg_len, 0, 0)); | |
b34c1a7e TC |
3786 | if (mg->mg_len == HEf_SVKEY) |
3787 | magic_sethint_feature(MUTABLE_SV(mg->mg_ptr), NULL, 0, NULL, FALSE); | |
3788 | else | |
3789 | magic_sethint_feature(NULL, mg->mg_ptr, mg->mg_len, NULL, FALSE); | |
b3ca2e83 NC |
3790 | return 0; |
3791 | } | |
3792 | ||
3793 | /* | |
f747ebd6 Z |
3794 | =for apidoc magic_clearhints |
3795 | ||
796b6530 | 3796 | Triggered by clearing C<%^H>, resets C<PL_compiling.cop_hints_hash>. |
f747ebd6 Z |
3797 | |
3798 | =cut | |
3799 | */ | |
3800 | int | |
3801 | Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg) | |
3802 | { | |
3803 | PERL_ARGS_ASSERT_MAGIC_CLEARHINTS; | |
3804 | PERL_UNUSED_ARG(sv); | |
3805 | PERL_UNUSED_ARG(mg); | |
20439bc7 Z |
3806 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
3807 | CopHINTHASH_set(&PL_compiling, cophh_new_empty()); | |
b34c1a7e | 3808 | CLEARFEATUREBITS(); |
f747ebd6 Z |
3809 | return 0; |
3810 | } | |
3811 | ||
09fb282d FC |
3812 | int |
3813 | Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv, | |
1604cfb0 | 3814 | const char *name, I32 namlen) |
09fb282d FC |
3815 | { |
3816 | MAGIC *nmg; | |
3817 | ||
3818 | PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER; | |
4f8dbb2d | 3819 | PERL_UNUSED_ARG(sv); |
09fb282d FC |
3820 | PERL_UNUSED_ARG(name); |
3821 | PERL_UNUSED_ARG(namlen); | |
3822 | ||
3823 | sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0); | |
3824 | nmg = mg_find(nsv, mg->mg_type); | |
316ebaf2 | 3825 | assert(nmg); |
09fb282d FC |
3826 | if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj); |
3827 | nmg->mg_ptr = mg->mg_ptr; | |
3828 | nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj); | |
3829 | nmg->mg_flags |= MGf_REFCOUNTED; | |
3830 | return 1; | |
3831 | } | |
3832 | ||
a6d69523 TC |
3833 | int |
3834 | Perl_magic_setdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3835 | PERL_ARGS_ASSERT_MAGIC_SETDEBUGVAR; | |
3836 | ||
23270f96 DM |
3837 | #if DBVARMG_SINGLE != 0 |
3838 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3839 | #endif | |
3840 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3841 | |
3842 | PL_DBcontrol[mg->mg_private] = SvIV_nomg(sv); | |
3843 | ||
3844 | return 1; | |
3845 | } | |
3846 | ||
3847 | int | |
3848 | Perl_magic_getdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3849 | PERL_ARGS_ASSERT_MAGIC_GETDEBUGVAR; | |
3850 | ||
23270f96 DM |
3851 | #if DBVARMG_SINGLE != 0 |
3852 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3853 | #endif | |
3854 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3855 | sv_setiv(sv, PL_DBcontrol[mg->mg_private]); |
3856 | ||
3857 | return 0; | |
3858 | } | |
3859 | ||
f747ebd6 | 3860 | /* |
14d04a33 | 3861 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3862 | */ |