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 | |
ff44333e | 90 | S_save_magic_flags(pTHX_ I32 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 | { |
35a4481c | 168 | const I32 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 | { |
35a4481c | 272 | const I32 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 | ||
954c1994 GS |
300 | /* |
301 | =for apidoc mg_length | |
302 | ||
d4e99c76 | 303 | Reports on the SV's length in bytes, calling length magic if available, |
796b6530 | 304 | but does not set the UTF8 flag on C<sv>. It will fall back to 'get' |
bd8446cf | 305 | magic if there is no 'length' magic, but with no indication as to |
796b6530 KW |
306 | whether it called 'get' magic. It assumes C<sv> is a C<PVMG> or |
307 | higher. Use C<sv_len()> instead. | |
954c1994 GS |
308 | |
309 | =cut | |
310 | */ | |
311 | ||
79072805 | 312 | U32 |
864dbfa3 | 313 | Perl_mg_length(pTHX_ SV *sv) |
79072805 LW |
314 | { |
315 | MAGIC* mg; | |
463ee0b2 | 316 | STRLEN len; |
463ee0b2 | 317 | |
7918f24d NC |
318 | PERL_ARGS_ASSERT_MG_LENGTH; |
319 | ||
79072805 | 320 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 321 | const MGVTBL * const vtbl = mg->mg_virtual; |
1604cfb0 | 322 | if (vtbl && vtbl->svt_len) { |
35a4481c | 323 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
1604cfb0 MS |
324 | save_magic(mgs_ix, sv); |
325 | /* omit MGf_GSKIP -- not changed here */ | |
326 | len = vtbl->svt_len(aTHX_ sv, mg); | |
327 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); | |
328 | return len; | |
329 | } | |
85e6fe83 LW |
330 | } |
331 | ||
bd8446cf | 332 | (void)SvPV_const(sv, len); |
463ee0b2 | 333 | return len; |
79072805 LW |
334 | } |
335 | ||
8fb26106 | 336 | I32 |
864dbfa3 | 337 | Perl_mg_size(pTHX_ SV *sv) |
93965878 NIS |
338 | { |
339 | MAGIC* mg; | |
ac27b0f5 | 340 | |
7918f24d NC |
341 | PERL_ARGS_ASSERT_MG_SIZE; |
342 | ||
93965878 | 343 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 344 | const MGVTBL* const vtbl = mg->mg_virtual; |
1604cfb0 | 345 | if (vtbl && vtbl->svt_len) { |
35a4481c AL |
346 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
347 | I32 len; | |
1604cfb0 MS |
348 | save_magic(mgs_ix, sv); |
349 | /* omit MGf_GSKIP -- not changed here */ | |
350 | len = vtbl->svt_len(aTHX_ sv, mg); | |
351 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); | |
352 | return len; | |
353 | } | |
93965878 NIS |
354 | } |
355 | ||
356 | switch(SvTYPE(sv)) { | |
1604cfb0 MS |
357 | case SVt_PVAV: |
358 | return AvFILLp((const AV *) sv); /* Fallback to non-tied array */ | |
359 | case SVt_PVHV: | |
360 | /* FIXME */ | |
361 | default: | |
362 | Perl_croak(aTHX_ "Size magic not implemented"); | |
81d52ecd | 363 | |
93965878 | 364 | } |
a25b5927 | 365 | NOT_REACHED; /* NOTREACHED */ |
93965878 NIS |
366 | } |
367 | ||
954c1994 GS |
368 | /* |
369 | =for apidoc mg_clear | |
370 | ||
fbe13c60 | 371 | Clear something magical that the SV represents. See C<L</sv_magic>>. |
954c1994 GS |
372 | |
373 | =cut | |
374 | */ | |
375 | ||
79072805 | 376 | int |
864dbfa3 | 377 | Perl_mg_clear(pTHX_ SV *sv) |
79072805 | 378 | { |
35a4481c | 379 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 380 | MAGIC* mg; |
8ac77ac9 | 381 | MAGIC *nextmg; |
463ee0b2 | 382 | |
7918f24d NC |
383 | PERL_ARGS_ASSERT_MG_CLEAR; |
384 | ||
455ece5e | 385 | save_magic(mgs_ix, sv); |
463ee0b2 | 386 | |
8ac77ac9 | 387 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { |
35a4481c | 388 | const MGVTBL* const vtbl = mg->mg_virtual; |
1604cfb0 | 389 | /* omit GSKIP -- never set here */ |
727405f8 | 390 | |
1604cfb0 | 391 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
8ac77ac9 | 392 | |
1604cfb0 MS |
393 | if (vtbl && vtbl->svt_clear) |
394 | vtbl->svt_clear(aTHX_ sv, mg); | |
79072805 | 395 | } |
463ee0b2 | 396 | |
8772537c | 397 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
398 | return 0; |
399 | } | |
400 | ||
ed624ca8 | 401 | static MAGIC* |
ddeaf645 | 402 | S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags) |
39de7f53 | 403 | { |
39de7f53 FR |
404 | assert(flags <= 1); |
405 | ||
406 | if (sv) { | |
1604cfb0 | 407 | MAGIC *mg; |
39de7f53 | 408 | |
1604cfb0 MS |
409 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
410 | if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) { | |
411 | return mg; | |
412 | } | |
413 | } | |
39de7f53 FR |
414 | } |
415 | ||
416 | return NULL; | |
417 | } | |
418 | ||
954c1994 GS |
419 | /* |
420 | =for apidoc mg_find | |
421 | ||
796b6530 | 422 | Finds the magic pointer for C<type> matching the SV. See C<L</sv_magic>>. |
954c1994 GS |
423 | |
424 | =cut | |
425 | */ | |
426 | ||
93a17b20 | 427 | MAGIC* |
ddeaf645 | 428 | Perl_mg_find(const SV *sv, int type) |
93a17b20 | 429 | { |
ddeaf645 | 430 | return S_mg_findext_flags(sv, type, NULL, 0); |
39de7f53 FR |
431 | } |
432 | ||
433 | /* | |
434 | =for apidoc mg_findext | |
435 | ||
436 | Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See | |
fbe13c60 | 437 | C<L</sv_magicext>>. |
39de7f53 FR |
438 | |
439 | =cut | |
440 | */ | |
441 | ||
442 | MAGIC* | |
ddeaf645 | 443 | Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl) |
39de7f53 | 444 | { |
ddeaf645 | 445 | return S_mg_findext_flags(sv, type, vtbl, 1); |
93a17b20 LW |
446 | } |
447 | ||
96c2a8ff FC |
448 | MAGIC * |
449 | Perl_mg_find_mglob(pTHX_ SV *sv) | |
450 | { | |
451 | PERL_ARGS_ASSERT_MG_FIND_MGLOB; | |
452 | if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') { | |
453 | /* This sv is only a delegate. //g magic must be attached to | |
454 | its target. */ | |
455 | vivify_defelem(sv); | |
456 | sv = LvTARG(sv); | |
457 | } | |
458 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) | |
ddeaf645 | 459 | return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0); |
96c2a8ff FC |
460 | return NULL; |
461 | } | |
462 | ||
954c1994 GS |
463 | /* |
464 | =for apidoc mg_copy | |
465 | ||
fbe13c60 | 466 | Copies the magic from one SV to another. See C<L</sv_magic>>. |
954c1994 GS |
467 | |
468 | =cut | |
469 | */ | |
470 | ||
79072805 | 471 | int |
864dbfa3 | 472 | Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen) |
79072805 | 473 | { |
463ee0b2 | 474 | int count = 0; |
79072805 | 475 | MAGIC* mg; |
7918f24d NC |
476 | |
477 | PERL_ARGS_ASSERT_MG_COPY; | |
478 | ||
463ee0b2 | 479 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 480 | const MGVTBL* const vtbl = mg->mg_virtual; |
1604cfb0 MS |
481 | if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){ |
482 | count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen); | |
483 | } | |
484 | else { | |
485 | const char type = mg->mg_type; | |
486 | if (isUPPER(type) && type != PERL_MAGIC_uvar) { | |
487 | sv_magic(nsv, | |
488 | (type == PERL_MAGIC_tied) | |
489 | ? SvTIED_obj(sv, mg) | |
27deb0cf | 490 | : mg->mg_obj, |
1604cfb0 MS |
491 | toLOWER(type), key, klen); |
492 | count++; | |
493 | } | |
494 | } | |
79072805 | 495 | } |
463ee0b2 | 496 | return count; |
79072805 LW |
497 | } |
498 | ||
954c1994 | 499 | /* |
0cbee0a4 DM |
500 | =for apidoc mg_localize |
501 | ||
9711599e | 502 | Copy some of the magic from an existing SV to new localized version of that |
dfcfced8 KW |
503 | SV. Container magic (I<e.g.>, C<%ENV>, C<$1>, C<tie>) |
504 | gets copied, value magic doesn't (I<e.g.>, | |
796b6530 | 505 | C<taint>, C<pos>). |
9711599e | 506 | |
796b6530 | 507 | If C<setmagic> is false then no set magic will be called on the new (empty) SV. |
61b16eb9 | 508 | This typically means that assignment will soon follow (e.g. S<C<'local $x = $y'>>), |
9711599e | 509 | and that will handle the magic. |
0cbee0a4 DM |
510 | |
511 | =cut | |
512 | */ | |
513 | ||
514 | void | |
af7df257 | 515 | Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic) |
0cbee0a4 DM |
516 | { |
517 | MAGIC *mg; | |
7918f24d NC |
518 | |
519 | PERL_ARGS_ASSERT_MG_LOCALIZE; | |
520 | ||
658a9f31 | 521 | if (nsv == DEFSV) |
1604cfb0 | 522 | return; |
658a9f31 | 523 | |
0cbee0a4 | 524 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
1604cfb0 MS |
525 | const MGVTBL* const vtbl = mg->mg_virtual; |
526 | if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) | |
527 | continue; | |
528 | ||
529 | if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local) | |
530 | (void)vtbl->svt_local(aTHX_ nsv, mg); | |
531 | else | |
532 | sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl, | |
533 | mg->mg_ptr, mg->mg_len); | |
a5063e7c | 534 | |
1604cfb0 MS |
535 | /* container types should remain read-only across localization */ |
536 | SvFLAGS(nsv) |= SvREADONLY(sv); | |
0cbee0a4 DM |
537 | } |
538 | ||
539 | if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) { | |
1604cfb0 MS |
540 | SvFLAGS(nsv) |= SvMAGICAL(sv); |
541 | if (setmagic) { | |
542 | PL_localizing = 1; | |
543 | SvSETMAGIC(nsv); | |
544 | PL_localizing = 0; | |
545 | } | |
0cbee0a4 DM |
546 | } |
547 | } | |
548 | ||
d9088386 Z |
549 | #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg) |
550 | static void | |
551 | S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg) | |
552 | { | |
553 | const MGVTBL* const vtbl = mg->mg_virtual; | |
554 | if (vtbl && vtbl->svt_free) | |
1604cfb0 | 555 | vtbl->svt_free(aTHX_ sv, mg); |
44955e7d | 556 | |
02a48966 DM |
557 | if (mg->mg_len > 0) |
558 | Safefree(mg->mg_ptr); | |
559 | else if (mg->mg_len == HEf_SVKEY) | |
560 | SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr)); | |
44955e7d | 561 | |
d9088386 | 562 | if (mg->mg_flags & MGf_REFCOUNTED) |
1604cfb0 | 563 | SvREFCNT_dec(mg->mg_obj); |
d9088386 Z |
564 | Safefree(mg); |
565 | } | |
566 | ||
0cbee0a4 | 567 | /* |
954c1994 GS |
568 | =for apidoc mg_free |
569 | ||
fbe13c60 | 570 | Free any magic storage used by the SV. See C<L</sv_magic>>. |
954c1994 GS |
571 | |
572 | =cut | |
573 | */ | |
574 | ||
79072805 | 575 | int |
864dbfa3 | 576 | Perl_mg_free(pTHX_ SV *sv) |
79072805 LW |
577 | { |
578 | MAGIC* mg; | |
579 | MAGIC* moremagic; | |
7918f24d NC |
580 | |
581 | PERL_ARGS_ASSERT_MG_FREE; | |
582 | ||
79072805 | 583 | for (mg = SvMAGIC(sv); mg; mg = moremagic) { |
1604cfb0 MS |
584 | moremagic = mg->mg_moremagic; |
585 | mg_free_struct(sv, mg); | |
586 | SvMAGIC_set(sv, moremagic); | |
79072805 | 587 | } |
b162af07 | 588 | SvMAGIC_set(sv, NULL); |
68f8932e | 589 | SvMAGICAL_off(sv); |
79072805 LW |
590 | return 0; |
591 | } | |
592 | ||
d9088386 | 593 | /* |
44170c9a | 594 | =for apidoc mg_free_type |
d9088386 | 595 | |
2d7f6611 | 596 | Remove any magic of type C<how> from the SV C<sv>. See L</sv_magic>. |
d9088386 Z |
597 | |
598 | =cut | |
599 | */ | |
600 | ||
601 | void | |
602 | Perl_mg_free_type(pTHX_ SV *sv, int how) | |
603 | { | |
604 | MAGIC *mg, *prevmg, *moremg; | |
605 | PERL_ARGS_ASSERT_MG_FREE_TYPE; | |
606 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
1604cfb0 MS |
607 | moremg = mg->mg_moremagic; |
608 | if (mg->mg_type == how) { | |
19742f39 | 609 | MAGIC *newhead; |
1604cfb0 MS |
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 | } | |
d9088386 Z |
622 | } |
623 | mg_magical(sv); | |
624 | } | |
625 | ||
e0d4aead TC |
626 | /* |
627 | =for apidoc mg_freeext | |
628 | ||
629 | Remove any magic of type C<how> using virtual table C<vtbl> from the | |
630 | SV C<sv>. See L</sv_magic>. | |
631 | ||
632 | C<mg_freeext(sv, how, NULL)> is equivalent to C<mg_free_type(sv, how)>. | |
633 | ||
634 | =cut | |
635 | */ | |
636 | ||
637 | void | |
638 | Perl_mg_freeext(pTHX_ SV *sv, int how, const MGVTBL *vtbl) | |
639 | { | |
640 | MAGIC *mg, *prevmg, *moremg; | |
641 | PERL_ARGS_ASSERT_MG_FREEEXT; | |
642 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
1604cfb0 MS |
643 | MAGIC *newhead; |
644 | moremg = mg->mg_moremagic; | |
645 | if (mg->mg_type == how && (vtbl == NULL || mg->mg_virtual == vtbl)) { | |
646 | /* temporarily move to the head of the magic chain, in case | |
647 | custom free code relies on this historical aspect of mg_free */ | |
648 | if (prevmg) { | |
649 | prevmg->mg_moremagic = moremg; | |
650 | mg->mg_moremagic = SvMAGIC(sv); | |
651 | SvMAGIC_set(sv, mg); | |
652 | } | |
653 | newhead = mg->mg_moremagic; | |
654 | mg_free_struct(sv, mg); | |
655 | SvMAGIC_set(sv, newhead); | |
656 | mg = prevmg; | |
657 | } | |
e0d4aead TC |
658 | } |
659 | mg_magical(sv); | |
660 | } | |
661 | ||
79072805 | 662 | #include <signal.h> |
79072805 | 663 | |
942e002e | 664 | U32 |
864dbfa3 | 665 | Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 666 | { |
8772537c | 667 | PERL_UNUSED_ARG(sv); |
6cef1e77 | 668 | |
7918f24d NC |
669 | PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT; |
670 | ||
0bd48802 | 671 | if (PL_curpm) { |
27deb0cf | 672 | REGEXP * const rx = PM_GETRE(PL_curpm); |
1604cfb0 | 673 | if (rx) { |
fa531f32 DM |
674 | const SSize_t n = (SSize_t)mg->mg_obj; |
675 | if (n == '+') { /* @+ */ | |
1604cfb0 MS |
676 | /* return the number possible */ |
677 | return RX_NPARENS(rx); | |
27deb0cf | 678 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
1604cfb0 | 679 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 | 680 | |
1604cfb0 MS |
681 | /* return the last filled */ |
682 | while ( paren >= 0 | |
683 | && (RX_OFFS(rx)[paren].start == -1 | |
684 | || RX_OFFS(rx)[paren].end == -1) ) | |
685 | paren--; | |
fa531f32 | 686 | if (n == '-') { |
27deb0cf YO |
687 | /* @- */ |
688 | return (U32)paren; | |
689 | } else { | |
690 | /* @^CAPTURE @{^CAPTURE} */ | |
691 | return paren >= 0 ? (U32)(paren-1) : (U32)-1; | |
692 | } | |
693 | } | |
1604cfb0 | 694 | } |
8f580fb8 | 695 | } |
ac27b0f5 | 696 | |
942e002e | 697 | return (U32)-1; |
6cef1e77 IZ |
698 | } |
699 | ||
6502e081 DM |
700 | /* @-, @+ */ |
701 | ||
6cef1e77 | 702 | int |
864dbfa3 | 703 | Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 704 | { |
7918f24d NC |
705 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET; |
706 | ||
0bd48802 | 707 | if (PL_curpm) { |
27deb0cf | 708 | REGEXP * const rx = PM_GETRE(PL_curpm); |
1604cfb0 | 709 | if (rx) { |
fa531f32 | 710 | const SSize_t n = (SSize_t)mg->mg_obj; |
27deb0cf YO |
711 | /* @{^CAPTURE} does not contain $&, so we need to increment by 1 */ |
712 | const I32 paren = mg->mg_len | |
fa531f32 | 713 | + (n == '\003' ? 1 : 0); |
1604cfb0 MS |
714 | SSize_t s; |
715 | SSize_t t; | |
716 | if (paren < 0) | |
717 | return 0; | |
718 | if (paren <= (I32)RX_NPARENS(rx) && | |
719 | (s = RX_OFFS(rx)[paren].start) != -1 && | |
720 | (t = RX_OFFS(rx)[paren].end) != -1) | |
721 | { | |
722 | SSize_t i; | |
27deb0cf | 723 | |
fa531f32 | 724 | if (n == '+') /* @+ */ |
1604cfb0 | 725 | i = t; |
fa531f32 | 726 | else if (n == '-') /* @- */ |
1604cfb0 | 727 | i = s; |
27deb0cf YO |
728 | else { /* @^CAPTURE @{^CAPTURE} */ |
729 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
730 | return 0; | |
731 | } | |
0bd48802 | 732 | |
1604cfb0 MS |
733 | if (RX_MATCH_UTF8(rx)) { |
734 | const char * const b = RX_SUBBEG(rx); | |
735 | if (b) | |
736 | i = RX_SUBCOFFSET(rx) + | |
6502e081 DM |
737 | utf8_length((U8*)b, |
738 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
1604cfb0 | 739 | } |
727405f8 | 740 | |
1604cfb0 MS |
741 | sv_setuv(sv, i); |
742 | return 0; | |
743 | } | |
744 | } | |
6cef1e77 | 745 | } |
3773545d | 746 | sv_set_undef(sv); |
6cef1e77 IZ |
747 | return 0; |
748 | } | |
749 | ||
6502e081 DM |
750 | /* @-, @+ */ |
751 | ||
e4b89193 | 752 | int |
a29d06ed MG |
753 | Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg) |
754 | { | |
7918f24d | 755 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET; |
dc3bf405 | 756 | PERL_UNUSED_CONTEXT; |
d4c19fe8 AL |
757 | PERL_UNUSED_ARG(sv); |
758 | PERL_UNUSED_ARG(mg); | |
cb077ed2 | 759 | Perl_croak_no_modify(); |
0dbb1585 | 760 | NORETURN_FUNCTION_END; |
a29d06ed MG |
761 | } |
762 | ||
ad3296c6 | 763 | #define SvRTRIM(sv) STMT_START { \ |
eae92ea0 GA |
764 | if (SvPOK(sv)) { \ |
765 | STRLEN len = SvCUR(sv); \ | |
766 | char * const p = SvPVX(sv); \ | |
1604cfb0 MS |
767 | while (len > 0 && isSPACE(p[len-1])) \ |
768 | --len; \ | |
769 | SvCUR_set(sv, len); \ | |
770 | p[len] = '\0'; \ | |
8e6b4db6 | 771 | } \ |
ad3296c6 SH |
772 | } STMT_END |
773 | ||
8b850bd5 NC |
774 | void |
775 | Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv) | |
776 | { | |
7918f24d NC |
777 | PERL_ARGS_ASSERT_EMULATE_COP_IO; |
778 | ||
8b850bd5 | 779 | if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT))) |
1604cfb0 | 780 | sv_set_undef(sv); |
8b850bd5 | 781 | else { |
b2aed775 | 782 | SvPVCLEAR(sv); |
1604cfb0 MS |
783 | SvUTF8_off(sv); |
784 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
785 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); | |
786 | assert(value); | |
787 | sv_catsv(sv, value); | |
788 | } | |
789 | sv_catpvs(sv, "\0"); | |
790 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
791 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); | |
792 | assert(value); | |
793 | sv_catsv(sv, value); | |
794 | } | |
8b850bd5 NC |
795 | } |
796 | } | |
797 | ||
d9fe7d23 KW |
798 | STATIC void |
799 | S_fixup_errno_string(pTHX_ SV* sv) | |
800 | { | |
801 | /* Do what is necessary to fixup the non-empty string in 'sv' for return to | |
802 | * Perl space. */ | |
803 | ||
804 | PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING; | |
805 | ||
806 | assert(SvOK(sv)); | |
b35e4f8b KW |
807 | |
808 | if(strEQ(SvPVX(sv), "")) { | |
1604cfb0 | 809 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); |
b35e4f8b KW |
810 | } |
811 | else { | |
d9fe7d23 | 812 | |
d3c0b317 KW |
813 | /* In some locales the error string may come back as UTF-8, in which |
814 | * case we should turn on that flag. This didn't use to happen, and to | |
5320b60d KW |
815 | * avoid as many possible backward compatibility issues as possible, we |
816 | * don't turn on the flag unless we have to. So the flag stays off for | |
9f10db87 | 817 | * an entirely invariant string. We assume that if the string looks |
fab19207 KW |
818 | * like UTF-8 in a single script, it really is UTF-8: "text in any |
819 | * other encoding that uses bytes with the high bit set is extremely | |
820 | * unlikely to pass a UTF-8 validity test" | |
9f10db87 KW |
821 | * (http://en.wikipedia.org/wiki/Charset_detection). There is a |
822 | * potential that we will get it wrong however, especially on short | |
a8f4b0c6 | 823 | * error message text, so do an additional check. */ |
027a0d26 KW |
824 | if ( ! IN_BYTES /* respect 'use bytes' */ |
825 | && is_utf8_non_invariant_string((U8*) SvPVX_const(sv), SvCUR(sv)) | |
a8f4b0c6 KW |
826 | |
827 | #ifdef USE_LOCALE_MESSAGES | |
828 | ||
61520eee | 829 | && _is_cur_LC_category_utf8(LC_MESSAGES) |
a8f4b0c6 | 830 | |
fab19207 KW |
831 | #else /* If can't check directly, at least can see if script is consistent, |
832 | under UTF-8, which gives us an extra measure of confidence. */ | |
833 | ||
834 | && isSCRIPT_RUN((const U8 *) SvPVX_const(sv), (U8 *) SvEND(sv), | |
8c53dada | 835 | TRUE) /* Means assume UTF-8 */ |
a8f4b0c6 KW |
836 | #endif |
837 | ||
838 | ) { | |
d3c0b317 KW |
839 | SvUTF8_on(sv); |
840 | } | |
b35e4f8b | 841 | } |
d9fe7d23 KW |
842 | } |
843 | ||
658db622 | 844 | /* |
3f620621 | 845 | =for apidoc_section $errno |
44170c9a | 846 | =for apidoc sv_string_from_errnum |
658db622 Z |
847 | |
848 | Generates the message string describing an OS error and returns it as | |
849 | an SV. C<errnum> must be a value that C<errno> could take, identifying | |
850 | the type of error. | |
851 | ||
852 | If C<tgtsv> is non-null then the string will be written into that SV | |
853 | (overwriting existing content) and it will be returned. If C<tgtsv> | |
854 | is a null pointer then the string will be written into a new mortal SV | |
855 | which will be returned. | |
856 | ||
857 | The message will be taken from whatever locale would be used by C<$!>, | |
858 | and will be encoded in the SV in whatever manner would be used by C<$!>. | |
859 | The details of this process are subject to future change. Currently, | |
860 | the message is taken from the C locale by default (usually producing an | |
861 | English message), and from the currently selected locale when in the scope | |
862 | of the C<use locale> pragma. A heuristic attempt is made to decode the | |
863 | message from the locale's character encoding, but it will only be decoded | |
864 | as either UTF-8 or ISO-8859-1. It is always correctly decoded in a UTF-8 | |
865 | locale, usually in an ISO-8859-1 locale, and never in any other locale. | |
866 | ||
867 | The SV is always returned containing an actual string, and with no other | |
868 | OK bits set. Unlike C<$!>, a message is even yielded for C<errnum> zero | |
869 | (meaning success), and if no useful message is available then a useless | |
870 | string (currently empty) is returned. | |
871 | ||
872 | =cut | |
873 | */ | |
874 | ||
875 | SV * | |
876 | Perl_sv_string_from_errnum(pTHX_ int errnum, SV *tgtsv) | |
877 | { | |
878 | char const *errstr; | |
879 | if(!tgtsv) | |
7ea8b04b | 880 | tgtsv = newSV_type_mortal(SVt_PV); |
658db622 Z |
881 | errstr = my_strerror(errnum); |
882 | if(errstr) { | |
1604cfb0 MS |
883 | sv_setpv(tgtsv, errstr); |
884 | fixup_errno_string(tgtsv); | |
658db622 | 885 | } else { |
1604cfb0 | 886 | SvPVCLEAR(tgtsv); |
658db622 Z |
887 | } |
888 | return tgtsv; | |
889 | } | |
890 | ||
25bbd826 CB |
891 | #ifdef VMS |
892 | #include <descrip.h> | |
893 | #include <starlet.h> | |
894 | #endif | |
895 | ||
79072805 | 896 | int |
864dbfa3 | 897 | Perl_magic_get(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 898 | { |
eb578fdb KW |
899 | I32 paren; |
900 | const char *s = NULL; | |
901 | REGEXP *rx; | |
823a54a3 | 902 | const char * const remaining = mg->mg_ptr + 1; |
e91d8259 | 903 | char nextchar; |
79072805 | 904 | |
7918f24d NC |
905 | PERL_ARGS_ASSERT_MAGIC_GET; |
906 | ||
e91d8259 | 907 | if (!mg->mg_ptr) { |
e91d8259 | 908 | paren = mg->mg_len; |
e91d8259 | 909 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
a6d0b1b5 | 910 | do_numbuf_fetch: |
e91d8259 | 911 | CALLREG_NUMBUF_FETCH(rx,paren,sv); |
e91d8259 | 912 | } |
e03e82a0 DM |
913 | else |
914 | goto set_undef; | |
e91d8259 NC |
915 | return 0; |
916 | } | |
917 | ||
918 | nextchar = *remaining; | |
79072805 | 919 | switch (*mg->mg_ptr) { |
748a9306 | 920 | case '\001': /* ^A */ |
1604cfb0 MS |
921 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
922 | else | |
e03e82a0 | 923 | sv_set_undef(sv); |
1604cfb0 MS |
924 | if (SvTAINTED(PL_bodytarget)) |
925 | SvTAINTED_on(sv); | |
926 | break; | |
e5218da5 | 927 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
1604cfb0 MS |
928 | if (nextchar == '\0') { |
929 | sv_setiv(sv, (IV)PL_minus_c); | |
930 | } | |
931 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { | |
932 | sv_setiv(sv, (IV)STATUS_NATIVE); | |
e5218da5 | 933 | } |
1604cfb0 | 934 | break; |
49460fe6 | 935 | |
79072805 | 936 | case '\004': /* ^D */ |
1604cfb0 MS |
937 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
938 | break; | |
28f23441 | 939 | case '\005': /* ^E */ |
1604cfb0 | 940 | if (nextchar != '\0') { |
6c6eab55 | 941 | if (strEQ(remaining, "NCODING")) |
3773545d | 942 | sv_set_undef(sv); |
4f4ff3a7 | 943 | break; |
6c6eab55 | 944 | } |
4f4ff3a7 KW |
945 | |
946 | #if defined(VMS) || defined(OS2) || defined(WIN32) | |
947 | # if defined(VMS) | |
2a99ff86 KW |
948 | { |
949 | char msg[255]; | |
950 | $DESCRIPTOR(msgdsc,msg); | |
951 | sv_setnv(sv,(NV) vaxc$errno); | |
952 | if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) | |
953 | sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); | |
954 | else | |
b2aed775 | 955 | SvPVCLEAR(sv); |
2a99ff86 | 956 | } |
4b645107 | 957 | #elif defined(OS2) |
2a99ff86 KW |
958 | if (!(_emx_env & 0x200)) { /* Under DOS */ |
959 | sv_setnv(sv, (NV)errno); | |
2c6ee1a7 | 960 | sv_setpv(sv, errno ? my_strerror(errno) : ""); |
2a99ff86 KW |
961 | } else { |
962 | if (errno != errno_isOS2) { | |
963 | const int tmp = _syserrno(); | |
964 | if (tmp) /* 2nd call to _syserrno() makes it 0 */ | |
965 | Perl_rc = tmp; | |
966 | } | |
967 | sv_setnv(sv, (NV)Perl_rc); | |
968 | sv_setpv(sv, os2error(Perl_rc)); | |
969 | } | |
1534c6f5 | 970 | if (SvOK(sv) && strNE(SvPVX(sv), "")) { |
99461a73 KW |
971 | fixup_errno_string(sv); |
972 | } | |
4f4ff3a7 | 973 | # elif defined(WIN32) |
2a99ff86 KW |
974 | { |
975 | const DWORD dwErr = GetLastError(); | |
976 | sv_setnv(sv, (NV)dwErr); | |
977 | if (dwErr) { | |
978 | PerlProc_GetOSError(sv, dwErr); | |
2efab60d | 979 | fixup_errno_string(sv); |
2a99ff86 KW |
980 | } |
981 | else | |
b2aed775 | 982 | SvPVCLEAR(sv); |
2a99ff86 KW |
983 | SetLastError(dwErr); |
984 | } | |
4f4ff3a7 KW |
985 | # else |
986 | # error Missing code for platform | |
987 | # endif | |
2a99ff86 KW |
988 | SvRTRIM(sv); |
989 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1604cfb0 | 990 | break; |
4f4ff3a7 KW |
991 | #endif /* End of platforms with special handling for $^E; others just fall |
992 | through to $! */ | |
2165bd23 | 993 | /* FALLTHROUGH */ |
46f3e16c KW |
994 | |
995 | case '!': | |
1604cfb0 | 996 | { |
5f1b979d | 997 | dSAVE_ERRNO; |
46f3e16c | 998 | #ifdef VMS |
5f1b979d | 999 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno)); |
46f3e16c | 1000 | #else |
5f1b979d | 1001 | sv_setnv(sv, (NV)errno); |
46f3e16c KW |
1002 | #endif |
1003 | #ifdef OS2 | |
5f1b979d KW |
1004 | if (errno == errno_isOS2 || errno == errno_isOS2_set) |
1005 | sv_setpv(sv, os2error(Perl_rc)); | |
1006 | else | |
46f3e16c | 1007 | #endif |
5f1b979d | 1008 | if (! errno) { |
b2aed775 | 1009 | SvPVCLEAR(sv); |
46f3e16c | 1010 | } |
5f1b979d | 1011 | else { |
658db622 Z |
1012 | sv_string_from_errnum(errno, sv); |
1013 | /* If no useful string is available, don't | |
1014 | * claim to have a string part. The SvNOK_on() | |
5f1b979d | 1015 | * below will cause just the number part to be valid */ |
658db622 Z |
1016 | if (!SvCUR(sv)) |
1017 | SvPOK_off(sv); | |
5f1b979d KW |
1018 | } |
1019 | RESTORE_ERRNO; | |
1604cfb0 | 1020 | } |
46f3e16c | 1021 | |
1604cfb0 MS |
1022 | SvRTRIM(sv); |
1023 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1024 | break; | |
46f3e16c | 1025 | |
79072805 | 1026 | case '\006': /* ^F */ |
9f601cf3 TC |
1027 | if (nextchar == '\0') { |
1028 | sv_setiv(sv, (IV)PL_maxsysfd); | |
1029 | } | |
1604cfb0 | 1030 | break; |
9ebf26ad | 1031 | case '\007': /* ^GLOBAL_PHASE */ |
1604cfb0 MS |
1032 | if (strEQ(remaining, "LOBAL_PHASE")) { |
1033 | sv_setpvn(sv, PL_phase_names[PL_phase], | |
1034 | strlen(PL_phase_names[PL_phase])); | |
1035 | } | |
1036 | break; | |
a0d0e21e | 1037 | case '\010': /* ^H */ |
1604cfb0 MS |
1038 | sv_setuv(sv, PL_hints); |
1039 | break; | |
9d116dd7 | 1040 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
1604cfb0 MS |
1041 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
1042 | break; | |
8561ea1d | 1043 | case '\014': /* ^LAST_FH */ |
1604cfb0 MS |
1044 | if (strEQ(remaining, "AST_FH")) { |
1045 | if (PL_last_in_gv && (SV*)PL_last_in_gv != &PL_sv_undef) { | |
1046 | assert(isGV_with_GP(PL_last_in_gv)); | |
972c8f20 | 1047 | sv_setrv_inc(sv, MUTABLE_SV(PL_last_in_gv)); |
1604cfb0 MS |
1048 | sv_rvweaken(sv); |
1049 | } | |
1050 | else | |
3773545d | 1051 | sv_set_undef(sv); |
1604cfb0 MS |
1052 | } |
1053 | break; | |
ac27b0f5 | 1054 | case '\017': /* ^O & ^OPEN */ |
1604cfb0 MS |
1055 | if (nextchar == '\0') { |
1056 | sv_setpv(sv, PL_osname); | |
1057 | SvTAINTED_off(sv); | |
1058 | } | |
1059 | else if (strEQ(remaining, "PEN")) { | |
1060 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); | |
1061 | } | |
1062 | break; | |
9ebf26ad | 1063 | case '\020': |
a6d0b1b5 | 1064 | sv_setiv(sv, (IV)PL_perldb); |
1604cfb0 | 1065 | break; |
fb73857a | 1066 | case '\023': /* ^S */ |
1604cfb0 MS |
1067 | if (nextchar == '\0') { |
1068 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) | |
1069 | SvOK_off(sv); | |
1070 | else if (PL_in_eval) | |
1071 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); | |
1072 | else | |
1073 | sv_setiv(sv, 0); | |
1074 | } | |
1075 | else if (strEQ(remaining, "AFE_LOCALES")) { | |
f512d242 KW |
1076 | |
1077 | #if ! defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE) | |
1078 | ||
1604cfb0 | 1079 | sv_setuv(sv, (UV) 1); |
f512d242 KW |
1080 | |
1081 | #else | |
1604cfb0 | 1082 | sv_setuv(sv, (UV) 0); |
f512d242 KW |
1083 | |
1084 | #endif | |
1085 | ||
1086 | } | |
1604cfb0 | 1087 | break; |
79072805 | 1088 | case '\024': /* ^T */ |
1604cfb0 | 1089 | if (nextchar == '\0') { |
88e89b8a | 1090 | #ifdef BIG_TIME |
7c36658b | 1091 | sv_setnv(sv, PL_basetime); |
88e89b8a | 1092 | #else |
7c36658b | 1093 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 1094 | #endif |
7c36658b | 1095 | } |
1604cfb0 | 1096 | else if (strEQ(remaining, "AINT")) |
284167a5 | 1097 | sv_setiv(sv, TAINTING_get |
1604cfb0 MS |
1098 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) |
1099 | : 0); | |
7c36658b | 1100 | break; |
e07ea26a | 1101 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
1604cfb0 MS |
1102 | if (strEQ(remaining, "NICODE")) |
1103 | sv_setuv(sv, (UV) PL_unicode); | |
1104 | else if (strEQ(remaining, "TF8LOCALE")) | |
1105 | sv_setuv(sv, (UV) PL_utf8locale); | |
1106 | else if (strEQ(remaining, "TF8CACHE")) | |
1107 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
1108 | break; |
1109 | case '\027': /* ^W & $^WARNING_BITS */ | |
1604cfb0 MS |
1110 | if (nextchar == '\0') |
1111 | sv_setiv(sv, (IV)cBOOL(PL_dowarn & G_WARN_ON)); | |
1112 | else if (strEQ(remaining, "ARNING_BITS")) { | |
1113 | if (PL_compiling.cop_warnings == pWARN_NONE) { | |
1114 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; | |
1115 | } | |
1116 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
e03e82a0 | 1117 | goto set_undef; |
1604cfb0 | 1118 | } |
d3a7d8c7 | 1119 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
1604cfb0 MS |
1120 | sv_setpvn(sv, WARN_ALLstring, WARNsize); |
1121 | } | |
4438c4b7 | 1122 | else { |
1604cfb0 MS |
1123 | sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1), |
1124 | *PL_compiling.cop_warnings); | |
1125 | } | |
1126 | } | |
1127 | break; | |
79072805 | 1128 | case '+': |
1604cfb0 MS |
1129 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
1130 | paren = RX_LASTPAREN(rx); | |
1131 | if (paren) | |
2c7b5d76 | 1132 | goto do_numbuf_fetch; |
1604cfb0 | 1133 | } |
e03e82a0 | 1134 | goto set_undef; |
a01268b5 | 1135 | case '\016': /* ^N */ |
1604cfb0 MS |
1136 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
1137 | paren = RX_LASTCLOSEPAREN(rx); | |
1138 | if (paren) | |
2c7b5d76 | 1139 | goto do_numbuf_fetch; |
1604cfb0 | 1140 | } |
e03e82a0 | 1141 | goto set_undef; |
79072805 | 1142 | case '.': |
1604cfb0 MS |
1143 | if (GvIO(PL_last_in_gv)) { |
1144 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); | |
1145 | } | |
1146 | break; | |
79072805 | 1147 | case '?': |
1604cfb0 MS |
1148 | { |
1149 | sv_setiv(sv, (IV)STATUS_CURRENT); | |
ff0cee69 | 1150 | #ifdef COMPLEX_STATUS |
1604cfb0 MS |
1151 | SvUPGRADE(sv, SVt_PVLV); |
1152 | LvTARGOFF(sv) = PL_statusvalue; | |
1153 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1154 | #endif |
1604cfb0 MS |
1155 | } |
1156 | break; | |
79072805 | 1157 | case '^': |
1604cfb0 MS |
1158 | if (GvIOp(PL_defoutgv)) |
1159 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); | |
1160 | if (s) | |
1161 | sv_setpv(sv,s); | |
1162 | else { | |
1163 | sv_setpv(sv,GvENAME(PL_defoutgv)); | |
1164 | sv_catpvs(sv,"_TOP"); | |
1165 | } | |
1166 | break; | |
79072805 | 1167 | case '~': |
1604cfb0 MS |
1168 | if (GvIOp(PL_defoutgv)) |
1169 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); | |
1170 | if (!s) | |
1171 | s = GvENAME(PL_defoutgv); | |
1172 | sv_setpv(sv,s); | |
1173 | break; | |
79072805 | 1174 | case '=': |
1604cfb0 MS |
1175 | if (GvIO(PL_defoutgv)) |
1176 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); | |
1177 | break; | |
79072805 | 1178 | case '-': |
1604cfb0 MS |
1179 | if (GvIO(PL_defoutgv)) |
1180 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); | |
1181 | break; | |
79072805 | 1182 | case '%': |
1604cfb0 MS |
1183 | if (GvIO(PL_defoutgv)) |
1184 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); | |
1185 | break; | |
79072805 | 1186 | case ':': |
79072805 | 1187 | case '/': |
1604cfb0 | 1188 | break; |
79072805 | 1189 | case '[': |
1604cfb0 MS |
1190 | sv_setiv(sv, 0); |
1191 | break; | |
79072805 | 1192 | case '|': |
1604cfb0 MS |
1193 | if (GvIO(PL_defoutgv)) |
1194 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); | |
1195 | break; | |
79072805 | 1196 | case '\\': |
1604cfb0 MS |
1197 | if (PL_ors_sv) |
1198 | sv_copypv(sv, PL_ors_sv); | |
1199 | else | |
e03e82a0 | 1200 | goto set_undef; |
1604cfb0 | 1201 | break; |
0e219455 | 1202 | case '$': /* $$ */ |
1604cfb0 MS |
1203 | { |
1204 | IV const pid = (IV)PerlProc_getpid(); | |
1205 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { | |
1206 | /* never set manually, or at least not since last fork */ | |
1207 | sv_setiv(sv, pid); | |
1208 | /* never unsafe, even if reading in a tainted expression */ | |
1209 | SvTAINTED_off(sv); | |
1210 | } | |
1211 | /* else a value has been assigned manually, so do nothing */ | |
1212 | } | |
1213 | break; | |
79072805 | 1214 | case '<': |
dfff4baf | 1215 | sv_setuid(sv, PerlProc_getuid()); |
1604cfb0 | 1216 | break; |
79072805 | 1217 | case '>': |
dfff4baf | 1218 | sv_setuid(sv, PerlProc_geteuid()); |
1604cfb0 | 1219 | break; |
79072805 | 1220 | case '(': |
dfff4baf | 1221 | sv_setgid(sv, PerlProc_getgid()); |
1604cfb0 | 1222 | goto add_groups; |
79072805 | 1223 | case ')': |
dfff4baf | 1224 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1225 | add_groups: |
79072805 | 1226 | #ifdef HAS_GETGROUPS |
1604cfb0 MS |
1227 | { |
1228 | Groups_t *gary = NULL; | |
375ed12a JH |
1229 | I32 num_groups = getgroups(0, gary); |
1230 | if (num_groups > 0) { | |
19742f39 | 1231 | I32 i; |
375ed12a JH |
1232 | Newx(gary, num_groups, Groups_t); |
1233 | num_groups = getgroups(num_groups, gary); | |
1234 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1235 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1236 | Safefree(gary); |
1237 | } | |
1604cfb0 | 1238 | } |
1a93d8df FG |
1239 | |
1240 | /* | |
1241 | Set this to avoid warnings when the SV is used as a number. | |
1242 | Avoid setting the public IOK flag so that serializers will | |
1243 | use the PV. | |
1244 | */ | |
1245 | (void)SvIOKp_on(sv); /* what a wonderful hack! */ | |
cd70abae | 1246 | #endif |
1604cfb0 | 1247 | break; |
79072805 | 1248 | case '0': |
1604cfb0 | 1249 | break; |
79072805 | 1250 | } |
a0d0e21e | 1251 | return 0; |
e03e82a0 DM |
1252 | |
1253 | set_undef: | |
1254 | sv_set_undef(sv); | |
1255 | return 0; | |
79072805 LW |
1256 | } |
1257 | ||
1258 | int | |
864dbfa3 | 1259 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1260 | { |
8772537c | 1261 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1262 | |
7918f24d NC |
1263 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1264 | ||
79072805 | 1265 | if (uf && uf->uf_val) |
1604cfb0 | 1266 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1267 | return 0; |
1268 | } | |
1269 | ||
1270 | int | |
864dbfa3 | 1271 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1272 | { |
9ae3433d | 1273 | STRLEN len = 0, klen; |
50352f16 FG |
1274 | |
1275 | const char *key; | |
888a67f6 | 1276 | const char *s = ""; |
1e422769 | 1277 | |
50352f16 FG |
1278 | SV *keysv = MgSV(mg); |
1279 | ||
1280 | if (keysv == NULL) { | |
1281 | key = mg->mg_ptr; | |
1282 | klen = mg->mg_len; | |
1283 | } | |
1284 | else { | |
1285 | if (!sv_utf8_downgrade(keysv, /* fail_ok */ TRUE)) { | |
1286 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv key (encoding to utf8)"); | |
1287 | } | |
1288 | ||
1289 | key = SvPV_const(keysv,klen); | |
1290 | } | |
1291 | ||
7918f24d NC |
1292 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1293 | ||
613c63b4 | 1294 | SvGETMAGIC(sv); |
12033064 | 1295 | if (SvOK(sv)) { |
613c63b4 CS |
1296 | /* defined environment variables are byte strings; unfortunately |
1297 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1298 | (void)SvPV_force_nomg_nolen(sv); | |
1299 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1300 | if (SvUTF8(sv)) { | |
1301 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1302 | SvUTF8_off(sv); | |
1303 | } | |
1304 | s = SvPVX(sv); | |
1305 | len = SvCUR(sv); | |
12033064 CS |
1306 | } |
1307 | my_setenv(key, s); /* does the deed */ | |
1308 | ||
a0d0e21e LW |
1309 | #ifdef DYNAMIC_ENV_FETCH |
1310 | /* We just undefd an environment var. Is a replacement */ | |
1311 | /* waiting in the wings? */ | |
1312 | if (!len) { | |
1604cfb0 MS |
1313 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
1314 | if (valp) | |
1315 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; | |
a0d0e21e LW |
1316 | } |
1317 | #endif | |
1e422769 | 1318 | |
4457f3fc | 1319 | #if !defined(OS2) && !defined(WIN32) |
1604cfb0 MS |
1320 | /* And you'll never guess what the dog had */ |
1321 | /* in its mouth... */ | |
284167a5 | 1322 | if (TAINTING_get) { |
1604cfb0 | 1323 | MgTAINTEDDIR_off(mg); |
1e422769 | 1324 | #ifdef VMS |
1604cfb0 MS |
1325 | if (s && memEQs(key, klen, "DCL$PATH")) { |
1326 | char pathbuf[256], eltbuf[256], *cp, *elt; | |
1327 | int i = 0, j = 0; | |
1328 | ||
1329 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); | |
1330 | elt = eltbuf; | |
1331 | do { /* DCL$PATH may be a search list */ | |
1332 | while (1) { /* as may dev portion of any element */ | |
1333 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1334 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1335 | cando_by_name(S_IWUSR,0,elt) ) { | |
1336 | MgTAINTEDDIR_on(mg); | |
1337 | return 0; | |
1338 | } | |
1339 | } | |
1340 | if ((cp = strchr(elt, ':')) != NULL) | |
1341 | *cp = '\0'; | |
1342 | if (my_trnlnm(elt, eltbuf, j++)) | |
1343 | elt = eltbuf; | |
1344 | else | |
1345 | break; | |
1346 | } | |
1347 | j = 0; | |
1348 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1349 | } | |
1e422769 | 1350 | #endif /* VMS */ |
1604cfb0 MS |
1351 | if (s && memEQs(key, klen, "PATH")) { |
1352 | const char * const strend = s + len; | |
1c9a202f YO |
1353 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1354 | const char path_sep = PL_perllib_sep; | |
1355 | #else | |
1356 | const char path_sep = ':'; | |
1357 | #endif | |
463ee0b2 | 1358 | |
70b484a8 DM |
1359 | /* set MGf_TAINTEDDIR if any component of the new path is |
1360 | * relative or world-writeable */ | |
1604cfb0 MS |
1361 | while (s < strend) { |
1362 | char tmpbuf[256]; | |
1363 | Stat_t st; | |
1364 | I32 i; | |
1604cfb0 MS |
1365 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
1366 | s, strend, path_sep, &i); | |
1367 | s++; | |
1368 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ | |
83269ced | 1369 | #ifdef __VMS |
1604cfb0 MS |
1370 | /* no colon thus no device name -- assume relative path */ |
1371 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1372 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1373 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 | 1374 | #else |
9eb153ff | 1375 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ |
326b5008 | 1376 | #endif |
1604cfb0 MS |
1377 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
1378 | MgTAINTEDDIR_on(mg); | |
1379 | return 0; | |
1380 | } | |
1381 | } | |
1382 | } | |
79072805 | 1383 | } |
4457f3fc | 1384 | #endif /* neither OS2 nor WIN32 */ |
1e422769 | 1385 | |
79072805 LW |
1386 | return 0; |
1387 | } | |
1388 | ||
1389 | int | |
864dbfa3 | 1390 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1391 | { |
7918f24d | 1392 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1393 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1394 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1395 | return 0; |
1396 | } | |
1397 | ||
88e89b8a | 1398 | int |
864dbfa3 | 1399 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1400 | { |
7918f24d | 1401 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1402 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1403 | #if defined(VMS) |
cea2e8a9 | 1404 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1405 | #else |
3280af22 | 1406 | if (PL_localizing) { |
1604cfb0 MS |
1407 | HE* entry; |
1408 | my_clearenv(); | |
1409 | hv_iterinit(MUTABLE_HV(sv)); | |
1410 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
1411 | I32 keylen; | |
1412 | my_setenv(hv_iterkey(entry, &keylen), | |
1413 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); | |
1414 | } | |
fb73857a | 1415 | } |
1416 | #endif | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | int | |
864dbfa3 | 1421 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1422 | { |
7918f24d | 1423 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1424 | PERL_UNUSED_ARG(sv); |
1425 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1426 | #if defined(VMS) |
1427 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1428 | #else | |
1429 | my_clearenv(); | |
1430 | #endif | |
3e3baf6d | 1431 | return 0; |
66b1d557 HM |
1432 | } |
1433 | ||
64ca3a65 | 1434 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1435 | #ifdef HAS_SIGPROCMASK |
1436 | static void | |
1437 | restore_sigmask(pTHX_ SV *save_sv) | |
1438 | { | |
0bd48802 | 1439 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1440 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1441 | } |
1442 | #endif | |
66b1d557 | 1443 | int |
864dbfa3 | 1444 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1445 | { |
88e89b8a | 1446 | /* Are we fetching a signal entry? */ |
708854f2 | 1447 | int i = (I16)mg->mg_private; |
7918f24d NC |
1448 | |
1449 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1450 | ||
708854f2 | 1451 | if (!i) { |
84c7b88c BF |
1452 | STRLEN siglen; |
1453 | const char * sig = MgPV_const(mg, siglen); | |
1454 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1455 | } |
1456 | ||
e02bfb16 | 1457 | if (i > 0) { |
1604cfb0 MS |
1458 | if(PL_psig_ptr[i]) |
1459 | sv_setsv(sv,PL_psig_ptr[i]); | |
1460 | else { | |
1461 | Sighandler_t sigstate = rsignal_state(i); | |
23ada85b | 1462 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
1604cfb0 MS |
1463 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1464 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1465 | #endif |
1466 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
1604cfb0 MS |
1467 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1468 | sigstate = SIG_DFL; | |
85b332e2 | 1469 | #endif |
1604cfb0 MS |
1470 | /* cache state so we don't fetch it again */ |
1471 | if(sigstate == (Sighandler_t) SIG_IGN) | |
1472 | sv_setpvs(sv,"IGNORE"); | |
1473 | else | |
e03e82a0 | 1474 | sv_set_undef(sv); |
1604cfb0 MS |
1475 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
1476 | SvTEMP_off(sv); | |
1477 | } | |
88e89b8a | 1478 | } |
1479 | return 0; | |
1480 | } | |
1481 | int | |
864dbfa3 | 1482 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1483 | { |
7918f24d | 1484 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1485 | |
38a124f0 | 1486 | magic_setsig(NULL, mg); |
179c85a2 | 1487 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1488 | } |
3d37d572 | 1489 | |
dc37125b | 1490 | |
5e7940ce | 1491 | #ifdef PERL_USE_3ARG_SIGHANDLER |
dc37125b DM |
1492 | Signal_t |
1493 | Perl_csighandler(int sig, Siginfo_t *sip, void *uap) | |
1494 | { | |
1495 | Perl_csighandler3(sig, sip, uap); | |
1496 | } | |
8aad04aa | 1497 | #else |
dc37125b | 1498 | Signal_t |
0a8e0eff | 1499 | Perl_csighandler(int sig) |
dc37125b DM |
1500 | { |
1501 | Perl_csighandler3(sig, NULL, NULL); | |
1502 | } | |
8aad04aa | 1503 | #endif |
dc37125b DM |
1504 | |
1505 | Signal_t | |
1506 | Perl_csighandler1(int sig) | |
1507 | { | |
1508 | Perl_csighandler3(sig, NULL, NULL); | |
1509 | } | |
1510 | ||
1511 | /* Handler intended to directly handle signal calls from the kernel. | |
1512 | * (Depending on configuration, the kernel may actually call one of the | |
1513 | * wrappers csighandler() or csighandler1() instead.) | |
1514 | * It either queues up the signal or dispatches it immediately depending | |
1515 | * on whether safe signals are enabled and whether the signal is capable | |
1516 | * of being deferred (e.g. SEGV isn't). | |
1517 | */ | |
1518 | ||
1519 | Signal_t | |
1520 | Perl_csighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
0a8e0eff | 1521 | { |
1018e26f NIS |
1522 | #ifdef PERL_GET_SIG_CONTEXT |
1523 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1524 | #else | |
85b332e2 CL |
1525 | dTHX; |
1526 | #endif | |
5e7940ce DM |
1527 | |
1528 | #ifdef PERL_USE_3ARG_SIGHANDLER | |
ffb6256b JH |
1529 | #if defined(__cplusplus) && defined(__GNUC__) |
1530 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1531 | * parameters would be warned about. */ | |
1532 | PERL_UNUSED_ARG(sip); | |
1533 | PERL_UNUSED_ARG(uap); | |
1534 | #endif | |
1271a1be | 1535 | #endif |
5e7940ce | 1536 | |
23ada85b | 1537 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1538 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1539 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1540 | #endif |
2e34cc90 | 1541 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1542 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1543 | #ifdef KILL_BY_SIGPRC |
1544 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1545 | #else | |
1546 | exit(1); | |
1547 | #endif | |
1548 | #endif | |
406878dd | 1549 | if ( |
853d2c32 | 1550 | #ifdef SIGILL |
1604cfb0 | 1551 | sig == SIGILL || |
853d2c32 RGS |
1552 | #endif |
1553 | #ifdef SIGBUS | |
1604cfb0 | 1554 | sig == SIGBUS || |
853d2c32 RGS |
1555 | #endif |
1556 | #ifdef SIGSEGV | |
1604cfb0 | 1557 | sig == SIGSEGV || |
5892d8f5 HS |
1558 | #endif |
1559 | #ifdef SIGFPE | |
1560 | sig == SIGFPE || | |
853d2c32 | 1561 | #endif |
1604cfb0 MS |
1562 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) |
1563 | /* Call the perl level handler now-- | |
1564 | * with risk we may be in malloc() or being destructed etc. */ | |
8a5e470b DM |
1565 | { |
1566 | if (PL_sighandlerp == Perl_sighandler) | |
1567 | /* default handler, so can call perly_sighandler() directly | |
1568 | * rather than via Perl_sighandler, passing the extra | |
1569 | * 'safe = false' arg | |
1570 | */ | |
ddb513d5 | 1571 | Perl_perly_sighandler(sig, NULL, NULL, 0 /* unsafe */); |
8a5e470b | 1572 | else |
5e7940ce | 1573 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1574 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1575 | #else |
8a5e470b | 1576 | (*PL_sighandlerp)(sig); |
92807b6d | 1577 | #endif |
8a5e470b | 1578 | } |
406878dd | 1579 | else { |
1604cfb0 MS |
1580 | if (!PL_psig_pend) return; |
1581 | /* Set a flag to say this signal is pending, that is awaiting delivery after | |
1582 | * the current Perl opcode completes */ | |
1583 | PL_psig_pend[sig]++; | |
406878dd GA |
1584 | |
1585 | #ifndef SIG_PENDING_DIE_COUNT | |
1586 | # define SIG_PENDING_DIE_COUNT 120 | |
1587 | #endif | |
1604cfb0 MS |
1588 | /* Add one to say _a_ signal is pending */ |
1589 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) | |
1590 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1591 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
406878dd | 1592 | } |
0a8e0eff NIS |
1593 | } |
1594 | ||
2e34cc90 CL |
1595 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1596 | void | |
1597 | Perl_csighandler_init(void) | |
1598 | { | |
1599 | int sig; | |
27da23d5 | 1600 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1601 | |
1602 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1603 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1604 | dTHX; |
27da23d5 | 1605 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1606 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1607 | #endif |
1608 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1609 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1610 | #endif |
1611 | } | |
27da23d5 | 1612 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1613 | } |
1614 | #endif | |
1615 | ||
7fe50b8b LT |
1616 | #if defined HAS_SIGPROCMASK |
1617 | static void | |
1618 | unblock_sigmask(pTHX_ void* newset) | |
1619 | { | |
dc3bf405 | 1620 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1621 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1622 | } | |
1623 | #endif | |
1624 | ||
0a8e0eff NIS |
1625 | void |
1626 | Perl_despatch_signals(pTHX) | |
1627 | { | |
1628 | int sig; | |
1629 | PL_sig_pending = 0; | |
1630 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1604cfb0 MS |
1631 | if (PL_psig_pend[sig]) { |
1632 | dSAVE_ERRNO; | |
7fe50b8b | 1633 | #ifdef HAS_SIGPROCMASK |
1604cfb0 MS |
1634 | /* From sigaction(2) (FreeBSD man page): |
1635 | * | Signal routines normally execute with the signal that | |
1636 | * | caused their invocation blocked, but other signals may | |
1637 | * | yet occur. | |
1638 | * Emulation of this behavior (from within Perl) is enabled | |
1639 | * using sigprocmask | |
1640 | */ | |
1641 | int was_blocked; | |
1642 | sigset_t newset, oldset; | |
1643 | ||
1644 | sigemptyset(&newset); | |
1645 | sigaddset(&newset, sig); | |
1646 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1647 | was_blocked = sigismember(&oldset, sig); | |
1648 | if (!was_blocked) { | |
1649 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1650 | ENTER; | |
1651 | SAVEFREESV(save_sv); | |
1652 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1653 | } | |
1654 | #endif | |
1655 | PL_psig_pend[sig] = 0; | |
8a5e470b DM |
1656 | if (PL_sighandlerp == Perl_sighandler) |
1657 | /* default handler, so can call perly_sighandler() directly | |
1658 | * rather than via Perl_sighandler, passing the extra | |
1659 | * 'safe = true' arg | |
1660 | */ | |
1661 | Perl_perly_sighandler(sig, NULL, NULL, 1 /* safe */); | |
1662 | else | |
5e7940ce | 1663 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1664 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1665 | #else |
8a5e470b | 1666 | (*PL_sighandlerp)(sig); |
92807b6d | 1667 | #endif |
8a5e470b | 1668 | |
7fe50b8b | 1669 | #ifdef HAS_SIGPROCMASK |
1604cfb0 MS |
1670 | if (!was_blocked) |
1671 | LEAVE; | |
55534442 | 1672 | #endif |
1604cfb0 MS |
1673 | RESTORE_ERRNO; |
1674 | } | |
0a8e0eff NIS |
1675 | } |
1676 | } | |
1677 | ||
38a124f0 | 1678 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1679 | int |
864dbfa3 | 1680 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1681 | { |
79072805 | 1682 | I32 i; |
cbbf8932 | 1683 | SV** svp = NULL; |
2d4fcd5e AJ |
1684 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1685 | * effects (due to closures). We must make sure that the new disposition | |
1686 | * is in place before it is called. | |
1687 | */ | |
cbbf8932 | 1688 | SV* to_dec = NULL; |
e72dc28c | 1689 | STRLEN len; |
2d4fcd5e AJ |
1690 | #ifdef HAS_SIGPROCMASK |
1691 | sigset_t set, save; | |
1692 | SV* save_sv; | |
1693 | #endif | |
eb578fdb | 1694 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1695 | |
1696 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1697 | ||
748a9306 | 1698 | if (*s == '_') { |
84c7b88c | 1699 | if (memEQs(s, len, "__DIE__")) |
1604cfb0 MS |
1700 | svp = &PL_diehook; |
1701 | else if (memEQs(s, len, "__WARN__") | |
1702 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { | |
1703 | /* Merge the existing behaviours, which are as follows: | |
1704 | magic_setsig, we always set svp to &PL_warnhook | |
1705 | (hence we always change the warnings handler) | |
1706 | For magic_clearsig, we don't change the warnings handler if it's | |
1707 | set to the &PL_warnhook. */ | |
1708 | svp = &PL_warnhook; | |
84c7b88c BF |
1709 | } else if (sv) { |
1710 | SV *tmp = sv_newmortal(); | |
1711 | Perl_croak(aTHX_ "No such hook: %s", | |
1712 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1713 | } | |
1604cfb0 MS |
1714 | i = 0; |
1715 | if (svp && *svp) { | |
1716 | if (*svp != PERL_WARNHOOK_FATAL) | |
1717 | to_dec = *svp; | |
1718 | *svp = NULL; | |
1719 | } | |
748a9306 LW |
1720 | } |
1721 | else { | |
1604cfb0 MS |
1722 | i = (I16)mg->mg_private; |
1723 | if (!i) { | |
1724 | i = whichsig_pvn(s, len); /* ...no, a brick */ | |
1725 | mg->mg_private = (U16)i; | |
1726 | } | |
1727 | if (i <= 0) { | |
1728 | if (sv) { | |
84c7b88c | 1729 | SV *tmp = sv_newmortal(); |
1604cfb0 | 1730 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", |
84c7b88c BF |
1731 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); |
1732 | } | |
1604cfb0 MS |
1733 | return 0; |
1734 | } | |
2d4fcd5e | 1735 | #ifdef HAS_SIGPROCMASK |
1604cfb0 MS |
1736 | /* Avoid having the signal arrive at a bad time, if possible. */ |
1737 | sigemptyset(&set); | |
1738 | sigaddset(&set,i); | |
1739 | sigprocmask(SIG_BLOCK, &set, &save); | |
1740 | ENTER; | |
1741 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); | |
1742 | SAVEFREESV(save_sv); | |
1743 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1744 | #endif | |
1745 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1746 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1604cfb0 | 1747 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1748 | #endif |
23ada85b | 1749 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
1604cfb0 | 1750 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1751 | #endif |
2e34cc90 | 1752 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
1604cfb0 MS |
1753 | PL_sig_defaulting[i] = 0; |
1754 | #endif | |
1755 | to_dec = PL_psig_ptr[i]; | |
1756 | if (sv) { | |
1757 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1758 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
1759 | ||
1760 | /* Signals don't change name during the program's execution, so once | |
1761 | they're cached in the appropriate slot of PL_psig_name, they can | |
1762 | stay there. | |
1763 | ||
1764 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1765 | at least, doing most of the work. */ | |
1766 | if (!PL_psig_name[i]) { | |
1767 | const char* name = PL_sig_name[i]; | |
1768 | PL_psig_name[i] = newSVpvn(name, strlen(name)); | |
1769 | SvREADONLY_on(PL_psig_name[i]); | |
1770 | } | |
1771 | } else { | |
1772 | SvREFCNT_dec(PL_psig_name[i]); | |
1773 | PL_psig_name[i] = NULL; | |
1774 | PL_psig_ptr[i] = NULL; | |
1775 | } | |
748a9306 | 1776 | } |
38a124f0 | 1777 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
1604cfb0 MS |
1778 | if (i) { |
1779 | (void)rsignal(i, PL_csighandlerp); | |
1780 | } | |
1781 | else | |
1782 | *svp = SvREFCNT_inc_simple_NN(sv); | |
38a124f0 | 1783 | } else { |
1604cfb0 MS |
1784 | if (sv && SvOK(sv)) { |
1785 | s = SvPV_force(sv, len); | |
1786 | } else { | |
1787 | sv = NULL; | |
1788 | } | |
1789 | if (sv && memEQs(s, len,"IGNORE")) { | |
1790 | if (i) { | |
23ada85b | 1791 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
1604cfb0 MS |
1792 | PL_sig_ignoring[i] = 1; |
1793 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1794 | #else |
1604cfb0 | 1795 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1796 | #endif |
1604cfb0 MS |
1797 | } |
1798 | } | |
1799 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { | |
1800 | if (i) { | |
2e34cc90 | 1801 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
1604cfb0 MS |
1802 | PL_sig_defaulting[i] = 1; |
1803 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1804 | #else |
1604cfb0 MS |
1805 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
1806 | #endif | |
1807 | } | |
1808 | } | |
1809 | else { | |
1810 | /* | |
1811 | * We should warn if HINT_STRICT_REFS, but without | |
1812 | * access to a known hint bit in a known OP, we can't | |
1813 | * tell whether HINT_STRICT_REFS is in force or not. | |
1814 | */ | |
1815 | if (!memchr(s, ':', len) && !memchr(s, '\'', len)) | |
1816 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), | |
1817 | SV_GMAGIC); | |
1818 | if (i) | |
1819 | (void)rsignal(i, PL_csighandlerp); | |
1820 | else | |
1821 | *svp = SvREFCNT_inc_simple_NN(sv); | |
1822 | } | |
748a9306 | 1823 | } |
9dfa190b | 1824 | |
2d4fcd5e AJ |
1825 | #ifdef HAS_SIGPROCMASK |
1826 | if(i) | |
1604cfb0 | 1827 | LEAVE; |
2d4fcd5e | 1828 | #endif |
ef8d46e8 | 1829 | SvREFCNT_dec(to_dec); |
79072805 LW |
1830 | return 0; |
1831 | } | |
64ca3a65 | 1832 | #endif /* !PERL_MICRO */ |
79072805 LW |
1833 | |
1834 | int | |
55f5e765 LT |
1835 | Perl_magic_setsigall(pTHX_ SV* sv, MAGIC* mg) |
1836 | { | |
1837 | PERL_ARGS_ASSERT_MAGIC_SETSIGALL; | |
1838 | PERL_UNUSED_ARG(mg); | |
1839 | ||
1840 | if (PL_localizing == 2) { | |
1841 | HV* hv = (HV*)sv; | |
1842 | HE* current; | |
1843 | hv_iterinit(hv); | |
1844 | while ((current = hv_iternext(hv))) { | |
1845 | SV* sigelem = hv_iterval(hv, current); | |
1846 | mg_set(sigelem); | |
1847 | } | |
1848 | } | |
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | int | |
864dbfa3 | 1853 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1854 | { |
7918f24d | 1855 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1856 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1857 | |
89c14e2e | 1858 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1859 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
1604cfb0 | 1860 | return 0; |
89c14e2e | 1861 | |
0e446081 | 1862 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1863 | } |
1864 | ||
0e446081 | 1865 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1866 | int |
52b45067 RD |
1867 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1868 | { | |
52b45067 | 1869 | HV* stash; |
7918f24d NC |
1870 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1871 | ||
52b45067 | 1872 | /* Bail out if destruction is going on */ |
627364f1 | 1873 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1874 | |
0e446081 | 1875 | if (sv) |
1604cfb0 | 1876 | av_clear(MUTABLE_AV(sv)); |
52b45067 | 1877 | |
6624142a | 1878 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1604cfb0 MS |
1879 | /* This occurs with setisa_elem magic, which calls this |
1880 | same function. */ | |
1881 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
6624142a | 1882 | |
316ebaf2 | 1883 | assert(mg); |
6624142a | 1884 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1604cfb0 MS |
1885 | SV **svp = AvARRAY((AV *)mg->mg_obj); |
1886 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1887 | while (items--) { | |
1888 | stash = GvSTASH((GV *)*svp++); | |
1889 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1890 | } | |
6624142a | 1891 | |
1604cfb0 | 1892 | return 0; |
6624142a FC |
1893 | } |
1894 | ||
52b45067 | 1895 | stash = GvSTASH( |
6624142a | 1896 | (const GV *)mg->mg_obj |
52b45067 RD |
1897 | ); |
1898 | ||
00169e2c FC |
1899 | /* The stash may have been detached from the symbol table, so check its |
1900 | name before doing anything. */ | |
1901 | if (stash && HvENAME_get(stash)) | |
1604cfb0 | 1902 | mro_isa_changed_in(stash); |
52b45067 RD |
1903 | |
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | int | |
864dbfa3 | 1908 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1909 | { |
85fbaab2 | 1910 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1911 | I32 i = 0; |
7918f24d NC |
1912 | |
1913 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1914 | PERL_UNUSED_ARG(mg); |
7719e241 | 1915 | |
6ff81951 | 1916 | if (hv) { |
497b47a8 | 1917 | (void) hv_iterinit(hv); |
ad64d0ec | 1918 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1604cfb0 | 1919 | i = HvUSEDKEYS(hv); |
497b47a8 | 1920 | else { |
1604cfb0 MS |
1921 | while (hv_iternext(hv)) |
1922 | i++; | |
497b47a8 | 1923 | } |
6ff81951 GS |
1924 | } |
1925 | ||
1926 | sv_setiv(sv, (IV)i); | |
1927 | return 0; | |
1928 | } | |
1929 | ||
1930 | int | |
864dbfa3 | 1931 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1932 | { |
7918f24d | 1933 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1934 | PERL_UNUSED_ARG(mg); |
946ec16e | 1935 | if (LvTARG(sv)) { |
1604cfb0 | 1936 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e | 1937 | } |
1938 | return 0; | |
ac27b0f5 | 1939 | } |
946ec16e | 1940 | |
efaf3674 | 1941 | /* |
3f620621 | 1942 | =for apidoc_section $magic |
efaf3674 DM |
1943 | =for apidoc magic_methcall |
1944 | ||
1945 | Invoke a magic method (like FETCH). | |
1946 | ||
2baee27b FC |
1947 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1948 | ||
1949 | C<meth> is the name of the method to call. | |
1950 | ||
1951 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1952 | ||
1953 | The C<flags> can be: | |
1954 | ||
1955 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1956 | return a value | |
1957 | G_UNDEF_FILL fill the stack with argc pointers to | |
1958 | PL_sv_undef | |
1959 | ||
1960 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1961 | |
796b6530 | 1962 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1963 | |
1964 | ||
1965 | =cut | |
1966 | */ | |
1967 | ||
1968 | SV* | |
36925d9e | 1969 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
1604cfb0 | 1970 | U32 argc, ...) |
a0d0e21e LW |
1971 | { |
1972 | dSP; | |
efaf3674 | 1973 | SV* ret = NULL; |
463ee0b2 | 1974 | |
7918f24d NC |
1975 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1976 | ||
efaf3674 | 1977 | ENTER; |
d1d7a15d NC |
1978 | |
1979 | if (flags & G_WRITING_TO_STDERR) { | |
1604cfb0 | 1980 | SAVETMPS; |
d1d7a15d | 1981 | |
1604cfb0 MS |
1982 | save_re_context(); |
1983 | SAVESPTR(PL_stderrgv); | |
1984 | PL_stderrgv = NULL; | |
d1d7a15d NC |
1985 | } |
1986 | ||
efaf3674 | 1987 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1988 | PUSHMARK(SP); |
efaf3674 | 1989 | |
052a7c76 DM |
1990 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1991 | assert(argc <= I32_MAX); | |
1992 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1993 | PUSHs(SvTIED_obj(sv, mg)); |
1994 | if (flags & G_UNDEF_FILL) { | |
1604cfb0 MS |
1995 | while (argc--) { |
1996 | PUSHs(&PL_sv_undef); | |
1997 | } | |
67549bd2 | 1998 | } else if (argc > 0) { |
1604cfb0 MS |
1999 | va_list args; |
2000 | va_start(args, argc); | |
046b0c7d | 2001 | |
1604cfb0 MS |
2002 | do { |
2003 | SV *const this_sv = va_arg(args, SV *); | |
2004 | PUSHs(this_sv); | |
2005 | } while (--argc); | |
046b0c7d | 2006 | |
1604cfb0 | 2007 | va_end(args); |
88e89b8a | 2008 | } |
463ee0b2 | 2009 | PUTBACK; |
efaf3674 | 2010 | if (flags & G_DISCARD) { |
1604cfb0 | 2011 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
2012 | } |
2013 | else { | |
1604cfb0 MS |
2014 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
2015 | ret = *PL_stack_sp--; | |
efaf3674 DM |
2016 | } |
2017 | POPSTACK; | |
d1d7a15d | 2018 | if (flags & G_WRITING_TO_STDERR) |
1604cfb0 | 2019 | FREETMPS; |
efaf3674 DM |
2020 | LEAVE; |
2021 | return ret; | |
2022 | } | |
2023 | ||
efaf3674 | 2024 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 2025 | |
efaf3674 | 2026 | STATIC SV* |
36925d9e | 2027 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
2028 | int n, SV *val) |
2029 | { | |
efaf3674 DM |
2030 | SV* arg1 = NULL; |
2031 | ||
2032 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
2033 | ||
2034 | if (mg->mg_ptr) { | |
1604cfb0 MS |
2035 | if (mg->mg_len >= 0) { |
2036 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); | |
2037 | } | |
2038 | else if (mg->mg_len == HEf_SVKEY) | |
2039 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
efaf3674 DM |
2040 | } |
2041 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
1604cfb0 MS |
2042 | arg1 = newSViv((IV)(mg->mg_len)); |
2043 | sv_2mortal(arg1); | |
efaf3674 DM |
2044 | } |
2045 | if (!arg1) { | |
1604cfb0 | 2046 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 2047 | } |
046b0c7d | 2048 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e | 2049 | } |
2050 | ||
76e3520e | 2051 | STATIC int |
36925d9e | 2052 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 2053 | { |
efaf3674 | 2054 | SV* ret; |
463ee0b2 | 2055 | |
7918f24d NC |
2056 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
2057 | ||
efaf3674 DM |
2058 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
2059 | if (ret) | |
1604cfb0 | 2060 | sv_setsv(sv, ret); |
a0d0e21e LW |
2061 | return 0; |
2062 | } | |
463ee0b2 | 2063 | |
a0d0e21e | 2064 | int |
864dbfa3 | 2065 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2066 | { |
7918f24d NC |
2067 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
2068 | ||
fd69380d | 2069 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
1604cfb0 | 2070 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 2071 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
2072 | return 0; |
2073 | } | |
2074 | ||
2075 | int | |
864dbfa3 | 2076 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 2077 | { |
b112cff9 DM |
2078 | MAGIC *tmg; |
2079 | SV *val; | |
7918f24d NC |
2080 | |
2081 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2082 | ||
b112cff9 DM |
2083 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2084 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2085 | * public flags indicate its value based on copying from $val. Doing | |
2086 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2087 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2088 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2089 | * enabled, even though taint magic is in the chain. In which case, | |
2090 | * fake up a temporary tainted value (this is easier than temporarily | |
2091 | * re-enabling magic on sv). */ | |
2092 | ||
284167a5 | 2093 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
1604cfb0 | 2094 | && (tmg->mg_len & 1)) |
b112cff9 | 2095 | { |
1604cfb0 MS |
2096 | val = sv_mortalcopy(sv); |
2097 | SvTAINTED_on(val); | |
b112cff9 DM |
2098 | } |
2099 | else | |
1604cfb0 | 2100 | val = sv; |
b112cff9 | 2101 | |
36925d9e | 2102 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2103 | return 0; |
2104 | } | |
2105 | ||
2106 | int | |
864dbfa3 | 2107 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2108 | { |
7918f24d NC |
2109 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2110 | ||
4c13be3f | 2111 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2112 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2113 | } |
463ee0b2 | 2114 | |
93965878 NIS |
2115 | |
2116 | U32 | |
864dbfa3 | 2117 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2118 | { |
22846ab4 | 2119 | I32 retval = 0; |
efaf3674 | 2120 | SV* retsv; |
93965878 | 2121 | |
7918f24d NC |
2122 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2123 | ||
36925d9e | 2124 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 | 2125 | if (retsv) { |
1604cfb0 MS |
2126 | retval = SvIV(retsv)-1; |
2127 | if (retval < -1) | |
2128 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2129 | } |
22846ab4 | 2130 | return (U32) retval; |
93965878 NIS |
2131 | } |
2132 | ||
cea2e8a9 GS |
2133 | int |
2134 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2135 | { |
7918f24d NC |
2136 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2137 | ||
36925d9e | 2138 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2139 | return 0; |
2140 | } | |
2141 | ||
2142 | int | |
864dbfa3 | 2143 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2144 | { |
efaf3674 | 2145 | SV* ret; |
463ee0b2 | 2146 | |
7918f24d NC |
2147 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2148 | ||
36925d9e | 2149 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
1604cfb0 | 2150 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); |
efaf3674 | 2151 | if (ret) |
1604cfb0 | 2152 | sv_setsv(key,ret); |
79072805 LW |
2153 | return 0; |
2154 | } | |
2155 | ||
2156 | int | |
1146e912 | 2157 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2158 | { |
7918f24d NC |
2159 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2160 | ||
36925d9e | 2161 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2162 | } |
a0d0e21e | 2163 | |
a3bcc51e TP |
2164 | SV * |
2165 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2166 | { | |
5fcbf73d | 2167 | SV *retval; |
ad64d0ec NC |
2168 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2169 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2170 | |
7918f24d NC |
2171 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2172 | ||
a3bcc51e TP |
2173 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2174 | SV *key; | |
bfcb3514 | 2175 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2176 | /* we are in an iteration so the hash cannot be empty */ |
2177 | return &PL_sv_yes; | |
2178 | /* no xhv_eiter so now use FIRSTKEY */ | |
2179 | key = sv_newmortal(); | |
ad64d0ec | 2180 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2181 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2182 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2183 | } | |
2184 | ||
2185 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2186 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2187 | if (!retval) |
1604cfb0 | 2188 | retval = &PL_sv_undef; |
a3bcc51e TP |
2189 | return retval; |
2190 | } | |
2191 | ||
a0d0e21e | 2192 | int |
864dbfa3 | 2193 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2194 | { |
089b5c60 | 2195 | SV **svp; |
7918f24d NC |
2196 | |
2197 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2198 | ||
089b5c60 NC |
2199 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2200 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2201 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2202 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2203 | } |
2204 | ||
2205 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2206 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a | 2207 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
1604cfb0 | 2208 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); |
089b5c60 | 2209 | |
8772537c | 2210 | if (svp && SvIOKp(*svp)) { |
1604cfb0 MS |
2211 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2212 | if (o) { | |
88df5f01 | 2213 | #ifdef PERL_DEBUG_READONLY_OPS |
1604cfb0 | 2214 | Slab_to_rw(OpSLAB(o)); |
88df5f01 | 2215 | #endif |
1604cfb0 MS |
2216 | /* set or clear breakpoint in the relevant control op */ |
2217 | if (SvTRUE(sv)) | |
2218 | o->op_flags |= OPf_SPECIAL; | |
2219 | else | |
2220 | o->op_flags &= ~OPf_SPECIAL; | |
88df5f01 | 2221 | #ifdef PERL_DEBUG_READONLY_OPS |
1604cfb0 | 2222 | Slab_to_ro(OpSLAB(o)); |
88df5f01 | 2223 | #endif |
1604cfb0 | 2224 | } |
5df8de69 | 2225 | } |
79072805 LW |
2226 | return 0; |
2227 | } | |
2228 | ||
2229 | int | |
8772537c | 2230 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2231 | { |
502c6561 | 2232 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2233 | |
2234 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2235 | ||
83bf042f | 2236 | if (obj) { |
1604cfb0 | 2237 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2238 | } else { |
3773545d | 2239 | sv_set_undef(sv); |
83bf042f | 2240 | } |
79072805 LW |
2241 | return 0; |
2242 | } | |
2243 | ||
2244 | int | |
864dbfa3 | 2245 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2246 | { |
502c6561 | 2247 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2248 | |
2249 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2250 | ||
83bf042f | 2251 | if (obj) { |
1604cfb0 | 2252 | av_fill(obj, SvIV(sv)); |
83bf042f | 2253 | } else { |
1604cfb0 MS |
2254 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2255 | "Attempt to set length of freed array"); | |
83bf042f NC |
2256 | } |
2257 | return 0; | |
2258 | } | |
2259 | ||
2260 | int | |
83f29afa VP |
2261 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2262 | { | |
83f29afa VP |
2263 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2264 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2265 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2266 | |
2267 | /* Reset the iterator when the array is cleared */ | |
4803e7f7 | 2268 | if (sizeof(IV) == sizeof(SSize_t)) { |
1604cfb0 | 2269 | *((IV *) &(mg->mg_len)) = 0; |
4803e7f7 | 2270 | } else { |
1604cfb0 MS |
2271 | if (mg->mg_ptr) |
2272 | *((IV *) mg->mg_ptr) = 0; | |
4803e7f7 | 2273 | } |
83f29afa VP |
2274 | |
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | int | |
83bf042f NC |
2279 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2280 | { | |
7918f24d | 2281 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2282 | PERL_UNUSED_ARG(sv); |
7918f24d | 2283 | |
94f3782b DM |
2284 | /* during global destruction, mg_obj may already have been freed */ |
2285 | if (PL_in_clean_all) | |
1604cfb0 | 2286 | return 0; |
94f3782b | 2287 | |
83bf042f NC |
2288 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2289 | ||
2290 | if (mg) { | |
1604cfb0 MS |
2291 | /* arylen scalar holds a pointer back to the array, but doesn't own a |
2292 | reference. Hence the we (the array) are about to go away with it | |
2293 | still pointing at us. Clear its pointer, else it would be pointing | |
2294 | at free memory. See the comment in sv_magic about reference loops, | |
2295 | and why it can't own a reference to us. */ | |
2296 | mg->mg_obj = 0; | |
83bf042f | 2297 | } |
a0d0e21e LW |
2298 | return 0; |
2299 | } | |
2300 | ||
2301 | int | |
864dbfa3 | 2302 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2303 | { |
16eb5365 | 2304 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2305 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2306 | |
2307 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2308 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2309 | |
6174b39a | 2310 | if (found && found->mg_len != -1) { |
1604cfb0 MS |
2311 | STRLEN i = found->mg_len; |
2312 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) | |
2313 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); | |
2314 | sv_setuv(sv, i); | |
2315 | return 0; | |
a0d0e21e | 2316 | } |
3773545d | 2317 | sv_set_undef(sv); |
a0d0e21e LW |
2318 | return 0; |
2319 | } | |
2320 | ||
2321 | int | |
864dbfa3 | 2322 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2323 | { |
16eb5365 | 2324 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2325 | SSize_t pos; |
2326 | STRLEN len; | |
53d44271 | 2327 | MAGIC* found; |
aec43834 | 2328 | const char *s; |
a0d0e21e | 2329 | |
7918f24d | 2330 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2331 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2332 | |
96c2a8ff | 2333 | found = mg_find_mglob(lsv); |
3881461a | 2334 | if (!found) { |
1604cfb0 MS |
2335 | if (!SvOK(sv)) |
2336 | return 0; | |
2337 | found = sv_magicext_mglob(lsv); | |
a0d0e21e LW |
2338 | } |
2339 | else if (!SvOK(sv)) { | |
1604cfb0 MS |
2340 | found->mg_len = -1; |
2341 | return 0; | |
a0d0e21e | 2342 | } |
aec43834 | 2343 | s = SvPV_const(lsv, len); |
a0d0e21e | 2344 | |
e1dccc0d | 2345 | pos = SvIV(sv); |
a0ed51b3 | 2346 | |
7e2040f0 | 2347 | if (DO_UTF8(lsv)) { |
19742f39 | 2348 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
1604cfb0 MS |
2349 | if (ulen) |
2350 | len = ulen; | |
a0ed51b3 LW |
2351 | } |
2352 | ||
a0d0e21e | 2353 | if (pos < 0) { |
1604cfb0 MS |
2354 | pos += len; |
2355 | if (pos < 0) | |
2356 | pos = 0; | |
a0d0e21e | 2357 | } |
eb160463 | 2358 | else if (pos > (SSize_t)len) |
1604cfb0 | 2359 | pos = len; |
a0ed51b3 | 2360 | |
3881461a | 2361 | found->mg_len = pos; |
25fdce4a | 2362 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2363 | |
79072805 LW |
2364 | return 0; |
2365 | } | |
2366 | ||
2367 | int | |
864dbfa3 | 2368 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2369 | { |
2370 | STRLEN len; | |
35a4481c | 2371 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2372 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2373 | STRLEN offs = LvTARGOFF(sv); |
2374 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2375 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2376 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2377 | |
2378 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2379 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2380 | |
83f78d1a | 2381 | if (!translate_substr_offsets( |
1604cfb0 MS |
2382 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
2383 | negoff ? -(IV)offs : (IV)offs, !negoff, | |
2384 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
83f78d1a | 2385 | )) { |
1604cfb0 | 2386 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); |
e03e82a0 | 2387 | sv_set_undef(sv); |
1604cfb0 | 2388 | return 0; |
83f78d1a FC |
2389 | } |
2390 | ||
9aa983d2 | 2391 | if (SvUTF8(lsv)) |
1604cfb0 | 2392 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2393 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2394 | if (SvUTF8(lsv)) |
2ef4b674 | 2395 | SvUTF8_on(sv); |
6ff81951 GS |
2396 | return 0; |
2397 | } | |
2398 | ||
2399 | int | |
864dbfa3 | 2400 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2401 | { |
83f78d1a | 2402 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2403 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2404 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2405 | STRLEN lvoff = LvTARGOFF(sv); |
2406 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2407 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2408 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2409 | |
2410 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2411 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2412 | |
a74fb2cd FC |
2413 | SvGETMAGIC(lsv); |
2414 | if (SvROK(lsv)) | |
1604cfb0 MS |
2415 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), |
2416 | "Attempt to use reference as lvalue in substr" | |
2417 | ); | |
fc061ed8 FC |
2418 | SvPV_force_nomg(lsv,lsv_len); |
2419 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a | 2420 | if (!translate_substr_offsets( |
1604cfb0 MS |
2421 | lsv_len, |
2422 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2423 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
83f78d1a | 2424 | )) |
1604cfb0 | 2425 | Perl_croak(aTHX_ "substr outside of string"); |
83f78d1a | 2426 | oldtarglen = lvlen; |
1aa99e6b | 2427 | if (DO_UTF8(sv)) { |
1604cfb0 MS |
2428 | sv_utf8_upgrade_nomg(lsv); |
2429 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); | |
2430 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); | |
2431 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); | |
2432 | SvUTF8_on(lsv); | |
9aa983d2 | 2433 | } |
0d336106 | 2434 | else if (SvUTF8(lsv)) { |
1604cfb0 MS |
2435 | const char *utf8; |
2436 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); | |
2437 | newtarglen = len; | |
2438 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); | |
2439 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); | |
2440 | Safefree(utf8); | |
1aa99e6b | 2441 | } |
b76f3ce2 | 2442 | else { |
1604cfb0 MS |
2443 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
2444 | newtarglen = len; | |
b76f3ce2 | 2445 | } |
83f78d1a FC |
2446 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2447 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2448 | |
79072805 LW |
2449 | return 0; |
2450 | } | |
2451 | ||
2452 | int | |
864dbfa3 | 2453 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2454 | { |
7918f24d | 2455 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2456 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2457 | #ifdef NO_TAINT_SUPPORT |
2458 | PERL_UNUSED_ARG(mg); | |
2459 | #endif | |
7918f24d | 2460 | |
64ff300b | 2461 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2462 | return 0; |
2463 | } | |
2464 | ||
2465 | int | |
864dbfa3 | 2466 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2467 | { |
7918f24d | 2468 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2469 | PERL_UNUSED_ARG(sv); |
7918f24d | 2470 | |
b01e650a | 2471 | /* update taint status */ |
284167a5 | 2472 | if (TAINT_get) |
1604cfb0 | 2473 | mg->mg_len |= 1; |
b01e650a | 2474 | else |
1604cfb0 | 2475 | mg->mg_len &= ~1; |
463ee0b2 LW |
2476 | return 0; |
2477 | } | |
2478 | ||
2479 | int | |
864dbfa3 | 2480 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2481 | { |
35a4481c | 2482 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2483 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2484 | |
2485 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2486 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2487 | |
1b92e694 | 2488 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2489 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2490 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2491 | |
6ff81951 GS |
2492 | return 0; |
2493 | } | |
2494 | ||
2495 | int | |
864dbfa3 | 2496 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2497 | { |
7918f24d | 2498 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2499 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2500 | do_vecset(sv); /* XXX slurp this routine */ |
2501 | return 0; | |
2502 | } | |
2503 | ||
13733cde FC |
2504 | SV * |
2505 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2506 | { |
a0714e2c | 2507 | SV *targ = NULL; |
13733cde FC |
2508 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2509 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2510 | assert(mg); | |
5f05dabc | 2511 | if (LvTARGLEN(sv)) { |
1604cfb0 MS |
2512 | if (mg->mg_obj) { |
2513 | SV * const ahv = LvTARG(sv); | |
2514 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); | |
6d822dc4 MS |
2515 | if (he) |
2516 | targ = HeVAL(he); | |
1604cfb0 MS |
2517 | } |
2518 | else if (LvSTARGOFF(sv) >= 0) { | |
2519 | AV *const av = MUTABLE_AV(LvTARG(sv)); | |
2520 | if (LvSTARGOFF(sv) <= AvFILL(av)) | |
2521 | { | |
2522 | if (SvRMAGICAL(av)) { | |
2523 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2524 | targ = svp ? *svp : NULL; | |
2525 | } | |
2526 | else | |
2527 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; | |
2528 | } | |
2529 | } | |
2530 | if (targ && (targ != &PL_sv_undef)) { | |
2531 | /* somebody else defined it for us */ | |
2532 | SvREFCNT_dec(LvTARG(sv)); | |
2533 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); | |
2534 | LvTARGLEN(sv) = 0; | |
2535 | SvREFCNT_dec(mg->mg_obj); | |
2536 | mg->mg_obj = NULL; | |
2537 | mg->mg_flags &= ~MGf_REFCOUNTED; | |
2538 | } | |
2539 | return targ; | |
5f05dabc | 2540 | } |
71be2cbc | 2541 | else |
1604cfb0 | 2542 | return LvTARG(sv); |
13733cde FC |
2543 | } |
2544 | ||
2545 | int | |
2546 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2547 | { | |
2548 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2549 | ||
2550 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc | 2551 | return 0; |
2552 | } | |
2553 | ||
2554 | int | |
864dbfa3 | 2555 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2556 | { |
7918f24d | 2557 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2558 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2559 | if (LvTARGLEN(sv)) |
1604cfb0 | 2560 | vivify_defelem(sv); |
68dc0745 | 2561 | if (LvTARG(sv)) { |
1604cfb0 MS |
2562 | sv_setsv(LvTARG(sv), sv); |
2563 | SvSETMAGIC(LvTARG(sv)); | |
68dc0745 | 2564 | } |
5f05dabc | 2565 | return 0; |
2566 | } | |
2567 | ||
71be2cbc | 2568 | void |
864dbfa3 | 2569 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2570 | { |
74e13ce4 | 2571 | MAGIC *mg; |
a0714e2c | 2572 | SV *value = NULL; |
71be2cbc | 2573 | |
7918f24d NC |
2574 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2575 | ||
14befaf4 | 2576 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
1604cfb0 | 2577 | return; |
68dc0745 | 2578 | if (mg->mg_obj) { |
1604cfb0 MS |
2579 | SV * const ahv = LvTARG(sv); |
2580 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); | |
6d822dc4 MS |
2581 | if (he) |
2582 | value = HeVAL(he); | |
1604cfb0 MS |
2583 | if (!value || value == &PL_sv_undef) |
2584 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); | |
71be2cbc | 2585 | } |
bbfdc870 | 2586 | else if (LvSTARGOFF(sv) < 0) |
1604cfb0 | 2587 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 | 2588 | else { |
1604cfb0 MS |
2589 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
2590 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) | |
2591 | LvTARG(sv) = NULL; /* array can't be extended */ | |
2592 | else { | |
2593 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); | |
2594 | if (!svp || !(value = *svp)) | |
2595 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
2596 | } | |
68dc0745 | 2597 | } |
b37c2d43 | 2598 | SvREFCNT_inc_simple_void(value); |
68dc0745 | 2599 | SvREFCNT_dec(LvTARG(sv)); |
2600 | LvTARG(sv) = value; | |
71be2cbc | 2601 | LvTARGLEN(sv) = 0; |
68dc0745 | 2602 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2603 | mg->mg_obj = NULL; |
68dc0745 | 2604 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc | 2605 | } |
2606 | ||
2607 | int | |
1f1dcfb5 FC |
2608 | Perl_magic_setnonelem(pTHX_ SV *sv, MAGIC *mg) |
2609 | { | |
2610 | PERL_ARGS_ASSERT_MAGIC_SETNONELEM; | |
2611 | PERL_UNUSED_ARG(mg); | |
2612 | sv_unmagic(sv, PERL_MAGIC_nonelem); | |
2613 | return 0; | |
2614 | } | |
2615 | ||
2616 | int | |
864dbfa3 | 2617 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2618 | { |
7918f24d | 2619 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2620 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2621 | return 0; | |
810b8aa5 GS |
2622 | } |
2623 | ||
2624 | int | |
864dbfa3 | 2625 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2626 | { |
7918f24d | 2627 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2628 | PERL_UNUSED_CONTEXT; |
0177730e | 2629 | PERL_UNUSED_ARG(sv); |
565764a8 | 2630 | mg->mg_len = -1; |
93a17b20 LW |
2631 | return 0; |
2632 | } | |
2633 | ||
02a48966 DM |
2634 | |
2635 | int | |
2636 | Perl_magic_freemglob(pTHX_ SV *sv, MAGIC *mg) | |
2637 | { | |
2638 | PERL_ARGS_ASSERT_MAGIC_FREEMGLOB; | |
2639 | PERL_UNUSED_ARG(sv); | |
2640 | ||
5d273abb DM |
2641 | /* pos() magic uses mg_len as a string position rather than a buffer |
2642 | * length, and mg_ptr is currently unused, so skip freeing. | |
2643 | */ | |
02a48966 | 2644 | assert(mg->mg_type == PERL_MAGIC_regex_global && mg->mg_len >= -1); |
02a48966 DM |
2645 | mg->mg_ptr = NULL; |
2646 | return 0; | |
2647 | } | |
2648 | ||
2649 | ||
93a17b20 | 2650 | int |
864dbfa3 | 2651 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2652 | { |
35a4481c | 2653 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2654 | |
7918f24d NC |
2655 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2656 | ||
79072805 | 2657 | if (uf && uf->uf_set) |
1604cfb0 | 2658 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2659 | return 0; |
2660 | } | |
2661 | ||
c277df42 | 2662 | int |
faf82a0b AE |
2663 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2664 | { | |
488344d2 | 2665 | const char type = mg->mg_type; |
7918f24d NC |
2666 | |
2667 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2668 | ||
a5c7cb08 DM |
2669 | assert( type == PERL_MAGIC_fm |
2670 | || type == PERL_MAGIC_qr | |
2671 | || type == PERL_MAGIC_bm); | |
488344d2 | 2672 | return sv_unmagic(sv, type); |
faf82a0b AE |
2673 | } |
2674 | ||
7a4c00b4 | 2675 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2676 | int |
864dbfa3 | 2677 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2678 | { |
7918f24d NC |
2679 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2680 | ||
bbce6d69 | 2681 | /* |
838b5b74 | 2682 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 | 2683 | * and vanished with a faint plop. |
2684 | */ | |
96a5add6 | 2685 | PERL_UNUSED_CONTEXT; |
8772537c | 2686 | PERL_UNUSED_ARG(sv); |
7a4c00b4 | 2687 | if (mg->mg_ptr) { |
1604cfb0 MS |
2688 | Safefree(mg->mg_ptr); |
2689 | mg->mg_ptr = NULL; | |
2690 | mg->mg_len = -1; | |
7a4c00b4 | 2691 | } |
bbce6d69 | 2692 | return 0; |
2693 | } | |
a457b73c DM |
2694 | |
2695 | int | |
2696 | Perl_magic_freecollxfrm(pTHX_ SV *sv, MAGIC *mg) | |
2697 | { | |
2698 | PERL_ARGS_ASSERT_MAGIC_FREECOLLXFRM; | |
2699 | PERL_UNUSED_ARG(sv); | |
2700 | ||
2701 | /* Collate magic uses mg_len as a string length rather than a buffer | |
2702 | * length, so we need to free even with mg_len == 0: hence we can't | |
2703 | * rely on standard magic free handling */ | |
fb072d00 TC |
2704 | if (mg->mg_len >= 0) { |
2705 | assert(mg->mg_type == PERL_MAGIC_collxfrm); | |
2706 | Safefree(mg->mg_ptr); | |
2707 | mg->mg_ptr = NULL; | |
2708 | } | |
2709 | ||
a457b73c DM |
2710 | return 0; |
2711 | } | |
7a4c00b4 | 2712 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2713 | |
7e8c5dac HS |
2714 | /* Just clear the UTF-8 cache data. */ |
2715 | int | |
2716 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2717 | { | |
7918f24d | 2718 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2719 | PERL_UNUSED_CONTEXT; |
8772537c | 2720 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2721 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2722 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2723 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2724 | return 0; | |
2725 | } | |
2726 | ||
bbce6d69 | 2727 | int |
032a4919 DM |
2728 | Perl_magic_freeutf8(pTHX_ SV *sv, MAGIC *mg) |
2729 | { | |
2730 | PERL_ARGS_ASSERT_MAGIC_FREEUTF8; | |
2731 | PERL_UNUSED_ARG(sv); | |
2732 | ||
2733 | /* utf8 magic uses mg_len as a string length rather than a buffer | |
2734 | * length, so we need to free even with mg_len == 0: hence we can't | |
2735 | * rely on standard magic free handling */ | |
2736 | assert(mg->mg_type == PERL_MAGIC_utf8 && mg->mg_len >= -1); | |
2737 | Safefree(mg->mg_ptr); | |
2738 | mg->mg_ptr = NULL; | |
2739 | return 0; | |
2740 | } | |
2741 | ||
2742 | ||
2743 | int | |
9cce4f9a FC |
2744 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2745 | { | |
9782ce69 | 2746 | const char *bad = NULL; |
9cce4f9a | 2747 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2748 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2749 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2750 | case OPpLVREF_SV: | |
1604cfb0 MS |
2751 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) |
2752 | bad = " SCALAR"; | |
2753 | break; | |
9782ce69 | 2754 | case OPpLVREF_AV: |
1604cfb0 MS |
2755 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) |
2756 | bad = "n ARRAY"; | |
2757 | break; | |
9782ce69 | 2758 | case OPpLVREF_HV: |
1604cfb0 MS |
2759 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) |
2760 | bad = " HASH"; | |
2761 | break; | |
9782ce69 | 2762 | case OPpLVREF_CV: |
1604cfb0 MS |
2763 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) |
2764 | bad = " CODE"; | |
9782ce69 FC |
2765 | } |
2766 | if (bad) | |
1604cfb0 MS |
2767 | /* diag_listed_as: Assigned value is not %s reference */ |
2768 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); | |
c146a62a FC |
2769 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2770 | case 0: | |
2771 | { | |
1604cfb0 MS |
2772 | SV * const old = PAD_SV(mg->mg_len); |
2773 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2774 | SvREFCNT_dec(old); | |
2775 | break; | |
c146a62a FC |
2776 | } |
2777 | case SVt_PVGV: | |
1604cfb0 MS |
2778 | gv_setref(mg->mg_obj, sv); |
2779 | SvSETMAGIC(mg->mg_obj); | |
2780 | break; | |
6102323a | 2781 | case SVt_PVAV: |
1604cfb0 MS |
2782 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), |
2783 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
2784 | break; | |
5f94141d | 2785 | case SVt_PVHV: |
1604cfb0 | 2786 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
7fcb36d5 | 2787 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); |
c146a62a | 2788 | } |
d39c26a6 | 2789 | if (mg->mg_flags & MGf_PERSIST) |
1604cfb0 MS |
2790 | NOOP; /* This sv is in use as an iterator var and will be reused, |
2791 | so we must leave the magic. */ | |
d39c26a6 | 2792 | else |
1604cfb0 MS |
2793 | /* This sv could be returned by the assignment op, so clear the |
2794 | magic, as lvrefs are an implementation detail that must not be | |
2795 | leaked to the user. */ | |
2796 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2797 | return 0; |
2798 | } | |
2799 | ||
f1540bed JH |
2800 | static void |
2801 | S_set_dollarzero(pTHX_ SV *sv) | |
2802 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2803 | { | |
f1540bed JH |
2804 | const char *s; |
2805 | STRLEN len; | |
f1540bed JH |
2806 | #ifdef HAS_SETPROCTITLE |
2807 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2808 | * show a string from the process struct and provide | |
2809 | * the setproctitle() routine to manipulate that. */ | |
2810 | if (PL_origalen != 1) { | |
2811 | s = SvPV_const(sv, len); | |
38626956 | 2812 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2813 | /* The leading "-" removes the "perl: " prefix, |
2814 | * but not the "(perl) suffix from the ps(1) | |
2815 | * output, because that's what ps(1) shows if the | |
2816 | * argv[] is modified. */ | |
2817 | setproctitle("-%s", s); | |
2818 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2819 | /* This doesn't really work if you assume that | |
2820 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2821 | * because in ps(1) output the result will be like | |
2822 | * sprintf("perl: %s (perl)", s) | |
2823 | * I guess this is a security feature: | |
2824 | * one (a user process) cannot get rid of the original name. | |
2825 | * --jhi */ | |
2826 | setproctitle("%s", s); | |
2827 | # endif | |
2828 | } | |
2829 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2830 | if (PL_origalen != 1) { | |
2831 | union pstun un; | |
2832 | s = SvPV_const(sv, len); | |
2833 | un.pst_command = (char *)s; | |
2834 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2835 | } | |
2836 | #else | |
2837 | if (PL_origalen > 1) { | |
4f3e04fd | 2838 | I32 i; |
f1540bed JH |
2839 | /* PL_origalen is set in perl_parse(). */ |
2840 | s = SvPV_force(sv,len); | |
2841 | if (len >= (STRLEN)PL_origalen-1) { | |
2842 | /* Longer than original, will be truncated. We assume that | |
2843 | * PL_origalen bytes are available. */ | |
2844 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2845 | } | |
2846 | else { | |
2847 | /* Shorter than original, will be padded. */ | |
2848 | #ifdef PERL_DARWIN | |
2849 | /* Special case for Mac OS X: see [perl #38868] */ | |
2850 | const int pad = 0; | |
2851 | #else | |
2852 | /* Is the space counterintuitive? Yes. | |
2853 | * (You were expecting \0?) | |
2854 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2855 | * --jhi */ | |
2856 | const int pad = ' '; | |
2857 | #endif | |
2858 | Copy(s, PL_origargv[0], len, char); | |
2859 | PL_origargv[0][len] = 0; | |
2860 | memset(PL_origargv[0] + len + 1, | |
2861 | pad, PL_origalen - len - 1); | |
2862 | } | |
2863 | PL_origargv[0][PL_origalen-1] = 0; | |
2864 | for (i = 1; i < PL_origargc; i++) | |
2865 | PL_origargv[i] = 0; | |
2866 | #ifdef HAS_PRCTL_SET_NAME | |
2867 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2868 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2869 | /* diag_listed_as: SKIPME */ | |
2870 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2871 | } | |
2872 | #endif | |
2873 | } | |
2874 | #endif | |
2875 | } | |
2876 | ||
9cce4f9a | 2877 | int |
864dbfa3 | 2878 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2879 | { |
eb578fdb KW |
2880 | I32 paren; |
2881 | const REGEXP * rx; | |
79072805 | 2882 | I32 i; |
8990e307 | 2883 | STRLEN len; |
125b9982 | 2884 | MAGIC *tmg; |
2fdbfb4d | 2885 | |
7918f24d NC |
2886 | PERL_ARGS_ASSERT_MAGIC_SET; |
2887 | ||
e91d8259 | 2888 | if (!mg->mg_ptr) { |
960b831f | 2889 | paren = mg->mg_len; |
1604cfb0 | 2890 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2891 | setparen_got_rx: |
fb15da9c | 2892 | CALLREG_NUMBUF_STORE((REGEXP *)rx,paren,sv); |
1604cfb0 | 2893 | } else { |
2fdbfb4d AB |
2894 | /* Croak with a READONLY error when a numbered match var is |
2895 | * set without a previous pattern match. Unless it's C<local $1> | |
2896 | */ | |
e91d8259 | 2897 | croakparen: |
2fdbfb4d | 2898 | if (!PL_localizing) { |
cb077ed2 | 2899 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2900 | } |
2901 | } | |
e91d8259 NC |
2902 | return 0; |
2903 | } | |
2904 | ||
2905 | switch (*mg->mg_ptr) { | |
748a9306 | 2906 | case '\001': /* ^A */ |
1604cfb0 MS |
2907 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2908 | else SvOK_off(PL_bodytarget); | |
2909 | FmLINES(PL_bodytarget) = 0; | |
2910 | if (SvPOK(PL_bodytarget)) { | |
2911 | char *s = SvPVX(PL_bodytarget); | |
0687887e | 2912 | char *e = SvEND(PL_bodytarget); |
1604cfb0 MS |
2913 | while ( ((s = (char *) memchr(s, '\n', e - s))) ) { |
2914 | FmLINES(PL_bodytarget)++; | |
2915 | s++; | |
2916 | } | |
2917 | } | |
2918 | /* mg_set() has temporarily made sv non-magical */ | |
2919 | if (TAINTING_get) { | |
2920 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) | |
2921 | SvTAINTED_on(PL_bodytarget); | |
2922 | else | |
2923 | SvTAINTED_off(PL_bodytarget); | |
2924 | } | |
2925 | break; | |
49460fe6 | 2926 | case '\003': /* ^C */ |
1604cfb0 MS |
2927 | PL_minus_c = cBOOL(SvIV(sv)); |
2928 | break; | |
49460fe6 | 2929 | |
79072805 | 2930 | case '\004': /* ^D */ |
b4ab917c | 2931 | #ifdef DEBUGGING |
a9e2d2bf DM |
2932 | { |
2933 | const char *s = SvPV_nolen_const(sv); | |
2934 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2935 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2936 | dump_all_perl(!DEBUG_B_TEST); | |
2937 | } | |
b4ab917c | 2938 | #else |
1604cfb0 | 2939 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2940 | #endif |
1604cfb0 | 2941 | break; |
28f23441 | 2942 | case '\005': /* ^E */ |
1604cfb0 | 2943 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2944 | #ifdef VMS |
1604cfb0 | 2945 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2946 | #elif defined(WIN32) |
1604cfb0 | 2947 | SetLastError( SvIV(sv) ); |
2abc681d | 2948 | #elif defined(OS2) |
1604cfb0 | 2949 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2950 | #else |
1604cfb0 MS |
2951 | /* will anyone ever use this? */ |
2952 | SETERRNO(SvIV(sv), 4); | |
22fae026 | 2953 | #endif |
1604cfb0 MS |
2954 | } |
2955 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) | |
fd503f5c | 2956 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); |
1604cfb0 | 2957 | break; |
79072805 | 2958 | case '\006': /* ^F */ |
9f601cf3 TC |
2959 | if (mg->mg_ptr[1] == '\0') { |
2960 | PL_maxsysfd = SvIV(sv); | |
2961 | } | |
1604cfb0 | 2962 | break; |
a0d0e21e | 2963 | case '\010': /* ^H */ |
efa571ab KW |
2964 | { |
2965 | U32 save_hints = PL_hints; | |
5d382c25 | 2966 | PL_hints = SvUV(sv); |
efa571ab KW |
2967 | |
2968 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2969 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2970 | notify_parser_that_changed_to_utf8(); | |
2971 | } | |
2972 | } | |
1604cfb0 | 2973 | break; |
9d116dd7 | 2974 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
1604cfb0 MS |
2975 | Safefree(PL_inplace); |
2976 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; | |
2977 | break; | |
d9bad346 | 2978 | case '\016': /* ^N */ |
1604cfb0 MS |
2979 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) |
2980 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2981 | goto croakparen; | |
28f23441 | 2982 | case '\017': /* ^O */ |
1604cfb0 MS |
2983 | if (*(mg->mg_ptr+1) == '\0') { |
2984 | Safefree(PL_osname); | |
2985 | PL_osname = NULL; | |
2986 | if (SvOK(sv)) { | |
2987 | TAINT_PROPER("assigning to $^O"); | |
2988 | PL_osname = savesvpv(sv); | |
2989 | } | |
2990 | } | |
2991 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
2992 | STRLEN len; | |
2993 | const char *const start = SvPV(sv, len); | |
2994 | const char *out = (const char*)memchr(start, '\0', len); | |
2995 | SV *tmp; | |
2996 | ||
2997 | ||
2998 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
2999 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
3000 | ||
3001 | /* Opening for input is more common than opening for output, so | |
3002 | ensure that hints for input are sooner on linked list. */ | |
3003 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, | |
3004 | SvUTF8(sv)) | |
3005 | : newSVpvs_flags("", SvUTF8(sv)); | |
3006 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
3007 | mg_set(tmp); | |
3008 | ||
3009 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, | |
3010 | SvUTF8(sv)); | |
3011 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
3012 | mg_set(tmp); | |
3013 | } | |
3014 | break; | |
79072805 | 3015 | case '\020': /* ^P */ |
2fdbfb4d AB |
3016 | PL_perldb = SvIV(sv); |
3017 | if (PL_perldb && !PL_DBsingle) | |
3018 | init_debugger(); | |
9b9e0be4 | 3019 | break; |
79072805 | 3020 | case '\024': /* ^T */ |
88e89b8a | 3021 | #ifdef BIG_TIME |
1604cfb0 | 3022 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 3023 | #else |
1604cfb0 | 3024 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 3025 | #endif |
1604cfb0 | 3026 | break; |
e07ea26a | 3027 | case '\025': /* ^UTF8CACHE */ |
1604cfb0 MS |
3028 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { |
3029 | PL_utf8cache = (signed char) sv_2iv(sv); | |
3030 | } | |
3031 | break; | |
fde18df1 | 3032 | case '\027': /* ^W & $^WARNING_BITS */ |
1604cfb0 MS |
3033 | if (*(mg->mg_ptr+1) == '\0') { |
3034 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
3035 | i = SvIV(sv); | |
3036 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) | |
3037 | | (i ? G_WARN_ON : G_WARN_OFF) ; | |
3038 | } | |
3039 | } | |
3040 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { | |
3041 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
3042 | if (!SvPOK(sv)) { | |
1943af61 | 3043 | free_and_set_cop_warnings(&PL_compiling, pWARN_STD); |
1604cfb0 MS |
3044 | break; |
3045 | } | |
3046 | { | |
3047 | STRLEN len, i; | |
3048 | int not_none = 0, not_all = 0; | |
3049 | const U8 * const ptr = (const U8 *)SvPV_const(sv, len) ; | |
3050 | for (i = 0 ; i < len ; ++i) { | |
3051 | not_none |= ptr[i]; | |
3052 | not_all |= ptr[i] ^ 0x55; | |
3053 | } | |
3054 | if (!not_none) { | |
1943af61 | 3055 | free_and_set_cop_warnings(&PL_compiling, pWARN_NONE); |
1604cfb0 | 3056 | } else if (len >= WARNsize && !not_all) { |
1943af61 | 3057 | free_and_set_cop_warnings(&PL_compiling, pWARN_ALL); |
1604cfb0 MS |
3058 | PL_dowarn |= G_WARN_ONCE ; |
3059 | } | |
94c8b9c1 | 3060 | else { |
1604cfb0 MS |
3061 | STRLEN len; |
3062 | const char *const p = SvPV_const(sv, len); | |
94c8b9c1 | 3063 | |
1604cfb0 MS |
3064 | PL_compiling.cop_warnings |
3065 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, | |
3066 | p, len); | |
72dc9ed5 | 3067 | |
1604cfb0 MS |
3068 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
3069 | PL_dowarn |= G_WARN_ONCE ; | |
3070 | } | |
f4fc7782 | 3071 | |
1604cfb0 MS |
3072 | } |
3073 | } | |
3074 | } | |
3075 | break; | |
79072805 | 3076 | case '.': |
1604cfb0 MS |
3077 | if (PL_localizing) { |
3078 | if (PL_localizing == 1) | |
3079 | SAVESPTR(PL_last_in_gv); | |
3080 | } | |
3081 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) | |
3082 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); | |
3083 | break; | |
79072805 | 3084 | case '^': |
1604cfb0 MS |
3085 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
3086 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); | |
3087 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); | |
3088 | break; | |
79072805 | 3089 | case '~': |
1604cfb0 MS |
3090 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
3091 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); | |
3092 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); | |
3093 | break; | |
79072805 | 3094 | case '=': |
1604cfb0 MS |
3095 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3096 | break; | |
79072805 | 3097 | case '-': |
1604cfb0 MS |
3098 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3099 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
3100 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; | |
3101 | break; | |
79072805 | 3102 | case '%': |
1604cfb0 MS |
3103 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3104 | break; | |
79072805 | 3105 | case '|': |
1604cfb0 MS |
3106 | { |
3107 | IO * const io = GvIO(PL_defoutgv); | |
3108 | if(!io) | |
3109 | break; | |
3110 | if ((SvIV(sv)) == 0) | |
3111 | IoFLAGS(io) &= ~IOf_FLUSH; | |
3112 | else { | |
3113 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
3114 | PerlIO *ofp = IoOFP(io); | |
3115 | if (ofp) | |
3116 | (void)PerlIO_flush(ofp); | |
3117 | IoFLAGS(io) |= IOf_FLUSH; | |
3118 | } | |
3119 | } | |
3120 | } | |
3121 | break; | |
79072805 | 3122 | case '/': |
1ab48e3a | 3123 | { |
1ab48e3a | 3124 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3125 | SV *referent = SvRV(sv); |
3126 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3127 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3128 | * the alternative is to copy pretty much the entire | |
3129 | * sv_reftype() into this routine, or to do a full string | |
3130 | * comparison on the return of sv_reftype() both of which | |
3131 | * make me feel worse! NOTE, do not modify this comment | |
3132 | * without reviewing the corresponding comment in | |
3133 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3134 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3135 | IV val = SvIV(referent); |
1ab48e3a | 3136 | if (val <= 0) { |
520b6fb6 DIM |
3137 | sv_setsv(sv, PL_rs); |
3138 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3139 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3140 | } |
3141 | } else { | |
ddce084a | 3142 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3143 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3144 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3145 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3146 | } |
3147 | } | |
b3a2acfa | 3148 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3149 | PL_rs = newSVsv(sv); |
b3a2acfa | 3150 | } |
1604cfb0 | 3151 | break; |
79072805 | 3152 | case '\\': |
1604cfb0 MS |
3153 | SvREFCNT_dec(PL_ors_sv); |
3154 | if (SvOK(sv)) { | |
3155 | PL_ors_sv = newSVsv(sv); | |
3156 | } | |
3157 | else { | |
3158 | PL_ors_sv = NULL; | |
3159 | } | |
3160 | break; | |
7d69d4a6 | 3161 | case '[': |
1604cfb0 MS |
3162 | if (SvIV(sv) != 0) |
3163 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3164 | break; | |
79072805 | 3165 | case '?': |
ff0cee69 | 3166 | #ifdef COMPLEX_STATUS |
1604cfb0 MS |
3167 | if (PL_localizing == 2) { |
3168 | SvUPGRADE(sv, SVt_PVLV); | |
3169 | PL_statusvalue = LvTARGOFF(sv); | |
3170 | PL_statusvalue_vms = LvTARGLEN(sv); | |
3171 | } | |
3172 | else | |
ff0cee69 | 3173 | #endif |
3174 | #ifdef VMSISH_STATUS | |
1604cfb0 MS |
3175 | if (VMSISH_STATUS) |
3176 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); | |
3177 | else | |
ff0cee69 | 3178 | #endif |
1604cfb0 MS |
3179 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
3180 | break; | |
79072805 | 3181 | case '!': |
93189314 JH |
3182 | { |
3183 | #ifdef VMS | |
3184 | # define PERL_VMS_BANG vaxc$errno | |
3185 | #else | |
3186 | # define PERL_VMS_BANG 0 | |
3187 | #endif | |
79c32fc2 | 3188 | #if defined(WIN32) |
1604cfb0 MS |
3189 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3190 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
c9beaf97 | 3191 | #else |
1604cfb0 MS |
3192 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
3193 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
c9beaf97 | 3194 | #endif |
1604cfb0 MS |
3195 | } |
3196 | break; | |
79072805 | 3197 | case '<': |
1604cfb0 | 3198 | { |
b469f1e0 | 3199 | /* XXX $< currently silently ignores failures */ |
1604cfb0 MS |
3200 | const Uid_t new_uid = SvUID(sv); |
3201 | PL_delaymagic_uid = new_uid; | |
3202 | if (PL_delaymagic) { | |
3203 | PL_delaymagic |= DM_RUID; | |
3204 | break; /* don't do magic till later */ | |
3205 | } | |
79072805 | 3206 | #ifdef HAS_SETRUID |
1604cfb0 | 3207 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3208 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3209 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3210 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3211 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3212 | #else |
1604cfb0 | 3213 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3214 | # ifdef PERL_DARWIN |
1604cfb0 MS |
3215 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
3216 | if (new_uid != 0 && PerlProc_getuid() == 0) | |
b469f1e0 | 3217 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3218 | # endif |
b469f1e0 | 3219 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
1604cfb0 MS |
3220 | } else { |
3221 | Perl_croak(aTHX_ "setruid() not implemented"); | |
3222 | } | |
79072805 | 3223 | #endif |
1604cfb0 MS |
3224 | break; |
3225 | } | |
79072805 | 3226 | case '>': |
1604cfb0 | 3227 | { |
b469f1e0 | 3228 | /* XXX $> currently silently ignores failures */ |
1604cfb0 MS |
3229 | const Uid_t new_euid = SvUID(sv); |
3230 | PL_delaymagic_euid = new_euid; | |
3231 | if (PL_delaymagic) { | |
3232 | PL_delaymagic |= DM_EUID; | |
3233 | break; /* don't do magic till later */ | |
3234 | } | |
79072805 | 3235 | #ifdef HAS_SETEUID |
1604cfb0 | 3236 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3237 | #elif defined(HAS_SETREUID) |
1604cfb0 | 3238 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3239 | #elif defined(HAS_SETRESUID) |
1604cfb0 | 3240 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3241 | #else |
1604cfb0 MS |
3242 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
3243 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); | |
3244 | else { | |
3245 | Perl_croak(aTHX_ "seteuid() not implemented"); | |
3246 | } | |
3247 | #endif | |
3248 | break; | |
3249 | } | |
79072805 | 3250 | case '(': |
1604cfb0 | 3251 | { |
b469f1e0 | 3252 | /* XXX $( currently silently ignores failures */ |
1604cfb0 MS |
3253 | const Gid_t new_gid = SvGID(sv); |
3254 | PL_delaymagic_gid = new_gid; | |
3255 | if (PL_delaymagic) { | |
3256 | PL_delaymagic |= DM_RGID; | |
3257 | break; /* don't do magic till later */ | |
3258 | } | |
79072805 | 3259 | #ifdef HAS_SETRGID |
1604cfb0 | 3260 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3261 | #elif defined(HAS_SETREGID) |
1604cfb0 | 3262 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3263 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3264 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3265 | #else |
1604cfb0 MS |
3266 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
3267 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); | |
3268 | else { | |
3269 | Perl_croak(aTHX_ "setrgid() not implemented"); | |
3270 | } | |
3271 | #endif | |
3272 | break; | |
3273 | } | |
79072805 | 3274 | case ')': |
1604cfb0 | 3275 | { |
0635704a HS |
3276 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3277 | * but you can override it if you need to. | |
3278 | */ | |
3279 | #ifndef INVALID_GID | |
3280 | #define INVALID_GID ((Gid_t)-1) | |
3281 | #endif | |
b469f1e0 | 3282 | /* XXX $) currently silently ignores failures */ |
1604cfb0 | 3283 | Gid_t new_egid; |
5cd24f17 | 3284 | #ifdef HAS_SETGROUPS |
1604cfb0 MS |
3285 | { |
3286 | const char *p = SvPV_const(sv, len); | |
757f63d8 | 3287 | Groups_t *gary = NULL; |
79e302e6 MM |
3288 | const char* p_end = p + len; |
3289 | const char* endptr = p_end; | |
22ff3130 | 3290 | UV uv; |
fb4089e0 | 3291 | #ifdef _SC_NGROUPS_MAX |
3292 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3293 | ||
3294 | if (maxgrp < 0) | |
3295 | maxgrp = NGROUPS; | |
3296 | #else | |
3297 | int maxgrp = NGROUPS; | |
3298 | #endif | |
757f63d8 SP |
3299 | |
3300 | while (isSPACE(*p)) | |
3301 | ++p; | |
22ff3130 HS |
3302 | if (grok_atoUV(p, &uv, &endptr)) |
3303 | new_egid = (Gid_t)uv; | |
3304 | else { | |
0635704a | 3305 | new_egid = INVALID_GID; |
22ff3130 HS |
3306 | endptr = NULL; |
3307 | } | |
fb4089e0 | 3308 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3309 | if (endptr == NULL) |
3310 | break; | |
3311 | p = endptr; | |
79e302e6 | 3312 | endptr = p_end; |
757f63d8 SP |
3313 | while (isSPACE(*p)) |
3314 | ++p; | |
3315 | if (!*p) | |
3316 | break; | |
fdadaf77 | 3317 | if (!gary) |
757f63d8 SP |
3318 | Newx(gary, i + 1, Groups_t); |
3319 | else | |
3320 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3321 | if (grok_atoUV(p, &uv, &endptr)) |
3322 | gary[i] = (Groups_t)uv; | |
3323 | else { | |
0635704a | 3324 | gary[i] = INVALID_GID; |
22ff3130 HS |
3325 | endptr = NULL; |
3326 | } | |
757f63d8 SP |
3327 | } |
3328 | if (i) | |
b469f1e0 | 3329 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
1604cfb0 MS |
3330 | Safefree(gary); |
3331 | } | |
5cd24f17 | 3332 | #else /* HAS_SETGROUPS */ |
dfff4baf | 3333 | new_egid = SvGID(sv); |
5cd24f17 | 3334 | #endif /* HAS_SETGROUPS */ |
1604cfb0 MS |
3335 | PL_delaymagic_egid = new_egid; |
3336 | if (PL_delaymagic) { | |
3337 | PL_delaymagic |= DM_EGID; | |
3338 | break; /* don't do magic till later */ | |
3339 | } | |
79072805 | 3340 | #ifdef HAS_SETEGID |
1604cfb0 | 3341 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3342 | #elif defined(HAS_SETREGID) |
1604cfb0 | 3343 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3344 | #elif defined(HAS_SETRESGID) |
1604cfb0 | 3345 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3346 | #else |
1604cfb0 MS |
3347 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
3348 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); | |
3349 | else { | |
3350 | Perl_croak(aTHX_ "setegid() not implemented"); | |
3351 | } | |
3352 | #endif | |
3353 | break; | |
3354 | } | |
79072805 | 3355 | case ':': |
1604cfb0 MS |
3356 | PL_chopset = SvPV_force(sv,len); |
3357 | break; | |
9cdac2a2 | 3358 | case '$': /* $$ */ |
1604cfb0 MS |
3359 | /* Store the pid in mg->mg_obj so we can tell when a fork has |
3360 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3361 | if (isGV(mg->mg_obj)) { | |
3362 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3363 | SvREFCNT_dec(mg->mg_obj); | |
3364 | mg->mg_flags |= MGf_REFCOUNTED; | |
3365 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3366 | } | |
3367 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3368 | break; | |
79072805 | 3369 | case '0': |
2d3b3561 FG |
3370 | if (!sv_utf8_downgrade(sv, /* fail_ok */ TRUE)) { |
3371 | ||
3372 | /* Since we are going to set the string's UTF8-encoded form | |
3373 | as the process name we should update $0 itself to contain | |
3374 | that same (UTF8-encoded) value. */ | |
3375 | sv_utf8_encode(GvSV(mg->mg_obj)); | |
3376 | ||
3377 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "$0"); | |
3378 | } | |
3379 | ||
1604cfb0 | 3380 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3381 | S_set_dollarzero(aTHX_ sv); |
1604cfb0 MS |
3382 | UNLOCK_DOLLARZERO_MUTEX; |
3383 | break; | |
79072805 LW |
3384 | } |
3385 | return 0; | |
3386 | } | |
3387 | ||
ea81552b | 3388 | /* |
3f620621 | 3389 | =for apidoc_section $signals |
ea81552b KW |
3390 | =for apidoc whichsig |
3391 | =for apidoc_item whichsig_pv | |
3392 | =for apidoc_item whichsig_pvn | |
3393 | =for apidoc_item whichsig_sv | |
3394 | ||
3395 | These all convert a signal name into its corresponding signal number; | |
3396 | returning -1 if no corresponding number was found. | |
3397 | ||
3398 | They differ only in the source of the signal name: | |
3399 | ||
3400 | C<whichsig_pv> takes the name from the C<NUL>-terminated string starting at | |
3401 | C<sig>. | |
3402 | ||
3403 | C<whichsig> is merely a different spelling, a synonym, of C<whichsig_pv>. | |
3404 | ||
3405 | C<whichsig_pvn> takes the name from the string starting at C<sig>, with length | |
3406 | C<len> bytes. | |
3407 | ||
3408 | C<whichsig_sv> takes the name from the PV stored in the SV C<sigsv>. | |
3409 | ||
3410 | =cut | |
3411 | */ | |
3412 | ||
79072805 | 3413 | I32 |
84c7b88c BF |
3414 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3415 | { | |
3416 | const char *sigpv; | |
3417 | STRLEN siglen; | |
3418 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3419 | sigpv = SvPV_const(sigsv, siglen); |
3420 | return whichsig_pvn(sigpv, siglen); | |
3421 | } | |
3422 | ||
3423 | I32 | |
3424 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3425 | { | |
3426 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3427 | return whichsig_pvn(sig, strlen(sig)); |
3428 | } | |
3429 | ||
3430 | I32 | |
3431 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3432 | { |
eb578fdb | 3433 | char* const* sigv; |
7918f24d | 3434 | |
84c7b88c | 3435 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3436 | PERL_UNUSED_CONTEXT; |
79072805 | 3437 | |
aadb217d | 3438 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
1604cfb0 MS |
3439 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
3440 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; | |
79072805 | 3441 | #ifdef SIGCLD |
84c7b88c | 3442 | if (memEQs(sig, len, "CHLD")) |
1604cfb0 | 3443 | return SIGCLD; |
79072805 LW |
3444 | #endif |
3445 | #ifdef SIGCHLD | |
84c7b88c | 3446 | if (memEQs(sig, len, "CLD")) |
1604cfb0 | 3447 | return SIGCHLD; |
79072805 | 3448 | #endif |
7f1236c0 | 3449 | return -1; |
79072805 LW |
3450 | } |
3451 | ||
dc37125b DM |
3452 | |
3453 | /* Perl_sighandler(), Perl_sighandler1(), Perl_sighandler3(): | |
3454 | * these three function are intended to be called by the OS as 'C' level | |
3455 | * signal handler functions in the case where unsafe signals are being | |
3456 | * used - i.e. they immediately invoke Perl_perly_sighandler() to call the | |
3457 | * perl-level sighandler, rather than deferring. | |
3458 | * In fact, the core itself will normally use Perl_csighandler as the | |
3459 | * OS-level handler; that function will then decide whether to queue the | |
3460 | * signal or call Perl_sighandler / Perl_perly_sighandler itself. So these | |
3461 | * functions are more useful for e.g. POSIX.xs when it wants explicit | |
3462 | * control of what's happening. | |
3463 | */ | |
3464 | ||
3465 | ||
5e7940ce | 3466 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b DM |
3467 | |
3468 | Signal_t | |
e7124897 | 3469 | Perl_sighandler(int sig, Siginfo_t *sip, void *uap) |
8a5e470b DM |
3470 | { |
3471 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3472 | } | |
3473 | ||
1e82f5a6 | 3474 | #else |
8a5e470b DM |
3475 | |
3476 | Signal_t | |
1e82f5a6 | 3477 | Perl_sighandler(int sig) |
8a5e470b DM |
3478 | { |
3479 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3480 | } | |
3481 | ||
1e82f5a6 | 3482 | #endif |
8a5e470b | 3483 | |
dc37125b DM |
3484 | Signal_t |
3485 | Perl_sighandler1(int sig) | |
3486 | { | |
3487 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3488 | } | |
3489 | ||
3490 | Signal_t | |
3491 | Perl_sighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
3492 | { | |
3493 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3494 | } | |
3495 | ||
3496 | ||
8a5e470b DM |
3497 | /* Invoke the perl-level signal handler. This function is called either |
3498 | * directly from one of the C-level signals handlers (Perl_sighandler or | |
3499 | * Perl_csighandler), or for safe signals, later from | |
3500 | * Perl_despatch_signals() at a suitable safe point during execution. | |
3501 | * | |
3502 | * 'safe' is a boolean indicating the latter call path. | |
3503 | */ | |
3504 | ||
3505 | Signal_t | |
3506 | Perl_perly_sighandler(int sig, Siginfo_t *sip PERL_UNUSED_DECL, | |
3507 | void *uap PERL_UNUSED_DECL, bool safe) | |
79072805 | 3508 | { |
1018e26f NIS |
3509 | #ifdef PERL_GET_SIG_CONTEXT |
3510 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3511 | #else |
cea2e8a9 | 3512 | dTHX; |
71d280e3 | 3513 | #endif |
79072805 | 3514 | dSP; |
a0714e2c SS |
3515 | GV *gv = NULL; |
3516 | SV *sv = NULL; | |
8772537c | 3517 | SV * const tSv = PL_Sv; |
601f1833 | 3518 | CV *cv = NULL; |
533c011a | 3519 | OP *myop = PL_op; |
84902520 | 3520 | U32 flags = 0; |
8772537c | 3521 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3522 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3523 | SV *errsv_save = NULL; |
71d280e3 | 3524 | |
84902520 | 3525 | |
727405f8 | 3526 | if (!PL_psig_ptr[sig]) { |
1604cfb0 MS |
3527 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
3528 | PL_sig_name[sig]); | |
3529 | exit(sig); | |
3530 | } | |
ff0cee69 | 3531 | |
a0d63a7b | 3532 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
1604cfb0 MS |
3533 | /* Max number of items pushed there is 3*n or 4. We cannot fix |
3534 | infinity, so we fix 4 (in fact 5): */ | |
3535 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3536 | flags |= 1; | |
3537 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3538 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3539 | } | |
84902520 | 3540 | } |
84902520 | 3541 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3542 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
1604cfb0 MS |
3543 | || SvTYPE(cv) != SVt_PVCV) { |
3544 | HV *st; | |
3545 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); | |
8772537c | 3546 | } |
84902520 | 3547 | |
a0d0e21e | 3548 | if (!cv || !CvROOT(cv)) { |
1604cfb0 MS |
3549 | const HEK * const hek = gv |
3550 | ? GvENAME_HEK(gv) | |
3551 | : cv && CvNAMED(cv) | |
3552 | ? CvNAME_HEK(cv) | |
3553 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; | |
3554 | if (hek) | |
3555 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3556 | "SIG%s handler \"%" HEKf "\" not defined.\n", | |
3557 | PL_sig_name[sig], HEKfARG(hek)); | |
3558 | /* diag_listed_as: SIG%s handler "%s" not defined */ | |
3559 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3560 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3561 | PL_sig_name[sig]); | |
3562 | goto cleanup; | |
79072805 LW |
3563 | } |
3564 | ||
0c4d3b5e | 3565 | sv = PL_psig_name[sig] |
1604cfb0 MS |
3566 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) |
3567 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3568 | flags |= 8; |
0c4d3b5e DM |
3569 | SAVEFREESV(sv); |
3570 | ||
a0d63a7b | 3571 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
1604cfb0 MS |
3572 | /* make sure our assumption about the size of the SAVEs are correct: |
3573 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3574 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
a0d63a7b | 3575 | } |
e336de0d | 3576 | |
e788e7d3 | 3577 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3578 | PUSHMARK(SP); |
79072805 | 3579 | PUSHs(sv); |
dc43527e | 3580 | |
8aad04aa JH |
3581 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3582 | { | |
1604cfb0 | 3583 | struct sigaction oact; |
8aad04aa | 3584 | |
1604cfb0 | 3585 | if (sip && sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { |
dc43527e DM |
3586 | HV *sih = newHV(); |
3587 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); | |
3588 | /* The siginfo fields signo, code, errno, pid, uid, | |
3589 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
3590 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); | |
3591 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
3592 | # ifdef HAS_SIGINFO_SI_ERRNO | |
3593 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3594 | # endif | |
3595 | # ifdef HAS_SIGINFO_SI_STATUS | |
3596 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3597 | # endif | |
3598 | # ifdef HAS_SIGINFO_SI_UID | |
3599 | { | |
3600 | SV *uid = newSV(0); | |
3601 | sv_setuid(uid, sip->si_uid); | |
3602 | (void)hv_stores(sih, "uid", uid); | |
3603 | } | |
3604 | # endif | |
3605 | # ifdef HAS_SIGINFO_SI_PID | |
3606 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3607 | # endif | |
3608 | # ifdef HAS_SIGINFO_SI_ADDR | |
3609 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3610 | # endif | |
3611 | # ifdef HAS_SIGINFO_SI_BAND | |
3612 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
3613 | # endif | |
3614 | EXTEND(SP, 2); | |
3615 | PUSHs(rv); | |
3616 | mPUSHp((char *)sip, sizeof(*sip)); | |
b4552a27 | 3617 | |
1604cfb0 | 3618 | } |
8aad04aa JH |
3619 | } |
3620 | #endif | |
dc43527e | 3621 | |
79072805 | 3622 | PUTBACK; |
a0d0e21e | 3623 | |
100c03aa JL |
3624 | errsv_save = newSVsv(ERRSV); |
3625 | ||
ad64d0ec | 3626 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3627 | |
d3acc0f7 | 3628 | POPSTACK; |
eed484f9 | 3629 | { |
1604cfb0 MS |
3630 | SV * const errsv = ERRSV; |
3631 | if (SvTRUE_NN(errsv)) { | |
3632 | SvREFCNT_dec(errsv_save); | |
dc43527e | 3633 | |
c22d665b | 3634 | #ifndef PERL_MICRO |
dc43527e DM |
3635 | /* Handler "died", for example to get out of a restart-able read(). |
3636 | * Before we re-do that on its behalf re-enable the signal which was | |
3637 | * blocked by the system when we entered. | |
3638 | */ | |
3639 | # ifdef HAS_SIGPROCMASK | |
1604cfb0 | 3640 | if (!safe) { |
8a5e470b DM |
3641 | /* safe signals called via dispatch_signals() set up a |
3642 | * savestack destructor, unblock_sigmask(), to | |
3643 | * automatically unblock the handler at the end. If | |
3644 | * instead we get here directly, we have to do it | |
3645 | * ourselves | |
3646 | */ | |
1604cfb0 MS |
3647 | sigset_t set; |
3648 | sigemptyset(&set); | |
3649 | sigaddset(&set,sig); | |
3650 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3651 | } | |
dc43527e | 3652 | # else |
1604cfb0 | 3653 | /* Not clear if this will work */ |
8a5e470b DM |
3654 | /* XXX not clear if this should be protected by 'if (safe)' |
3655 | * too */ | |
3656 | ||
1604cfb0 MS |
3657 | (void)rsignal(sig, SIG_IGN); |
3658 | (void)rsignal(sig, PL_csighandlerp); | |
dc43527e | 3659 | # endif |
c22d665b | 3660 | #endif /* !PERL_MICRO */ |
dc43527e | 3661 | |
1604cfb0 MS |
3662 | die_sv(errsv); |
3663 | } | |
3664 | else { | |
3665 | sv_setsv(errsv, errsv_save); | |
3666 | SvREFCNT_dec(errsv_save); | |
3667 | } | |
100c03aa JL |
3668 | } |
3669 | ||
7b52d656 | 3670 | cleanup: |
0c4d3b5e DM |
3671 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3672 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3673 | if (flags & 8) |
1604cfb0 | 3674 | SvREFCNT_dec_NN(sv); |
533c011a | 3675 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3676 | |
3280af22 NIS |
3677 | PL_Sv = tSv; /* Restore global temporaries. */ |
3678 | PL_Xpv = tXpv; | |
53bb94e2 | 3679 | return; |
79072805 | 3680 | } |
4e35701f NIS |
3681 | |
3682 | ||
51371543 | 3683 | static void |
8772537c | 3684 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3685 | { |
8772537c AL |
3686 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3687 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3688 | bool bumped; |
51371543 GS |
3689 | |
3690 | if (!sv) | |
3691 | return; | |
3692 | ||
4bac9ae4 | 3693 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
1604cfb0 MS |
3694 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ |
3695 | if (mgs->mgs_flags) | |
3696 | SvFLAGS(sv) |= mgs->mgs_flags; | |
3697 | else | |
3698 | mg_magical(sv); | |
51371543 GS |
3699 | } |
3700 | ||
150b625d | 3701 | bumped = mgs->mgs_bumped; |
51371543 GS |
3702 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3703 | ||
3704 | /* If we're still on top of the stack, pop us off. (That condition | |
3705 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3706 | * if it's being called via leave_scope.) | |
3707 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3708 | * may leave alloc gunk on the savestack, and some code | |
3709 | * (e.g. sighandler) doesn't expect that... | |
3710 | */ | |
3711 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3712 | { | |
1604cfb0 | 3713 | UV popval = SSPOPUV; |
1be36ce0 | 3714 | assert(popval == SAVEt_DESTRUCTOR_X); |
51371543 | 3715 | PL_savestack_ix -= 2; |
1604cfb0 | 3716 | popval = SSPOPUV; |
1be36ce0 NC |
3717 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); |
3718 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3719 | } |
150b625d | 3720 | if (bumped) { |
1604cfb0 MS |
3721 | if (SvREFCNT(sv) == 1) { |
3722 | /* We hold the last reference to this SV, which implies that the | |
3723 | SV was deleted as a side effect of the routines we called. | |
3724 | So artificially keep it alive a bit longer. | |
3725 | We avoid turning on the TEMP flag, which can cause the SV's | |
3726 | buffer to get stolen (and maybe other stuff). */ | |
3727 | sv_2mortal(sv); | |
3728 | SvTEMP_off(sv); | |
3729 | } | |
3730 | else | |
3731 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ | |
8985fe98 | 3732 | } |
51371543 GS |
3733 | } |
3734 | ||
0c4d3b5e DM |
3735 | /* clean up the mess created by Perl_sighandler(). |
3736 | * Note that this is only called during an exit in a signal handler; | |
3737 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3738 | * skipped over. */ |
0c4d3b5e | 3739 | |
51371543 | 3740 | static void |
8772537c | 3741 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3742 | { |
0c4d3b5e | 3743 | PERL_UNUSED_ARG(p); |
7918f24d | 3744 | |
0c4d3b5e | 3745 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3746 | } |
1018e26f | 3747 | |
66610fdd | 3748 | /* |
3f620621 | 3749 | =for apidoc_section $magic |
b3ca2e83 NC |
3750 | =for apidoc magic_sethint |
3751 | ||
796b6530 | 3752 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3753 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3754 | anything that would need a deep copy. Maybe we should warn if we find a | |
3755 | reference. | |
b3ca2e83 NC |
3756 | |
3757 | =cut | |
3758 | */ | |
3759 | int | |
3760 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3761 | { | |
ad64d0ec | 3762 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
1604cfb0 | 3763 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3764 | |
7918f24d NC |
3765 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3766 | ||
e6e3e454 NC |
3767 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3768 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3769 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3770 | or take other more complex action. */ | |
3771 | ||
5b9c0671 NC |
3772 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3773 | Doing this here saves a lot of doing it manually in perl code (and | |
3774 | forgetting to do it, and consequent subtle errors. */ | |
3775 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 | 3776 | CopHINTHASH_set(&PL_compiling, |
1604cfb0 | 3777 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); |
b34c1a7e | 3778 | magic_sethint_feature(key, NULL, 0, sv, 0); |
b3ca2e83 NC |
3779 | return 0; |
3780 | } | |
3781 | ||
3782 | /* | |
f175cff5 | 3783 | =for apidoc magic_clearhint |
b3ca2e83 | 3784 | |
796b6530 | 3785 | Triggered by a delete from C<%^H>, records the key to |
c28fe1ec | 3786 | C<PL_compiling.cop_hints_hash>. |
b3ca2e83 NC |
3787 | |
3788 | =cut | |
3789 | */ | |
3790 | int | |
3791 | Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg) | |
3792 | { | |
7918f24d | 3793 | PERL_ARGS_ASSERT_MAGIC_CLEARHINT; |
f5a63d97 AL |
3794 | PERL_UNUSED_ARG(sv); |
3795 | ||
5b9c0671 | 3796 | PL_hints |= HINT_LOCALIZE_HH; |
20439bc7 | 3797 | CopHINTHASH_set(&PL_compiling, |
1604cfb0 MS |
3798 | mg->mg_len == HEf_SVKEY |
3799 | ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling), | |
3800 | MUTABLE_SV(mg->mg_ptr), 0, 0) | |
3801 | : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling), | |
3802 | mg->mg_ptr, mg->mg_len, 0, 0)); | |
b34c1a7e TC |
3803 | if (mg->mg_len == HEf_SVKEY) |
3804 | magic_sethint_feature(MUTABLE_SV(mg->mg_ptr), NULL, 0, NULL, FALSE); | |
3805 | else | |
3806 | magic_sethint_feature(NULL, mg->mg_ptr, mg->mg_len, NULL, FALSE); | |
b3ca2e83 NC |
3807 | return 0; |
3808 | } | |
3809 | ||
3810 | /* | |
f747ebd6 Z |
3811 | =for apidoc magic_clearhints |
3812 | ||
796b6530 | 3813 | Triggered by clearing C<%^H>, resets C<PL_compiling.cop_hints_hash>. |
f747ebd6 Z |
3814 | |
3815 | =cut | |
3816 | */ | |
3817 | int | |
3818 | Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg) | |
3819 | { | |
3820 | PERL_ARGS_ASSERT_MAGIC_CLEARHINTS; | |
3821 | PERL_UNUSED_ARG(sv); | |
3822 | PERL_UNUSED_ARG(mg); | |
20439bc7 Z |
3823 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
3824 | CopHINTHASH_set(&PL_compiling, cophh_new_empty()); | |
b34c1a7e | 3825 | CLEARFEATUREBITS(); |
f747ebd6 Z |
3826 | return 0; |
3827 | } | |
3828 | ||
09fb282d FC |
3829 | int |
3830 | Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv, | |
1604cfb0 | 3831 | const char *name, I32 namlen) |
09fb282d FC |
3832 | { |
3833 | MAGIC *nmg; | |
3834 | ||
3835 | PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER; | |
4f8dbb2d | 3836 | PERL_UNUSED_ARG(sv); |
09fb282d FC |
3837 | PERL_UNUSED_ARG(name); |
3838 | PERL_UNUSED_ARG(namlen); | |
3839 | ||
3840 | sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0); | |
3841 | nmg = mg_find(nsv, mg->mg_type); | |
316ebaf2 | 3842 | assert(nmg); |
09fb282d FC |
3843 | if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj); |
3844 | nmg->mg_ptr = mg->mg_ptr; | |
3845 | nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj); | |
3846 | nmg->mg_flags |= MGf_REFCOUNTED; | |
3847 | return 1; | |
3848 | } | |
3849 | ||
a6d69523 TC |
3850 | int |
3851 | Perl_magic_setdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3852 | PERL_ARGS_ASSERT_MAGIC_SETDEBUGVAR; | |
3853 | ||
23270f96 DM |
3854 | #if DBVARMG_SINGLE != 0 |
3855 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3856 | #endif | |
3857 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3858 | |
3859 | PL_DBcontrol[mg->mg_private] = SvIV_nomg(sv); | |
3860 | ||
3861 | return 1; | |
3862 | } | |
3863 | ||
3864 | int | |
3865 | Perl_magic_getdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3866 | PERL_ARGS_ASSERT_MAGIC_GETDEBUGVAR; | |
3867 | ||
23270f96 DM |
3868 | #if DBVARMG_SINGLE != 0 |
3869 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3870 | #endif | |
3871 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3872 | sv_setiv(sv, PL_DBcontrol[mg->mg_private]); |
3873 | ||
3874 | return 0; | |
3875 | } | |
3876 | ||
f747ebd6 | 3877 | /* |
14d04a33 | 3878 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3879 | */ |