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. */ | |
106 | SvREFCNT_inc_simple_void_NN(sv); | |
107 | bumped = TRUE; | |
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))) { |
218787bd VP |
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) { | |
35a4481c | 184 | const MGVTBL * const vtbl = mg->mg_virtual; |
f9c6fee5 | 185 | MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */ |
ff76feab | 186 | |
2b260de0 | 187 | if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) { |
a9844598 CS |
188 | |
189 | /* taint's mg get is so dumb it doesn't need flag saving */ | |
b949b68f DM |
190 | if (mg->mg_type != PERL_MAGIC_taint) { |
191 | taint_only = FALSE; | |
192 | if (!saved) { | |
193 | save_magic(mgs_ix, sv); | |
194 | saved = TRUE; | |
195 | } | |
196 | } | |
a9844598 | 197 | |
16c91539 | 198 | vtbl->svt_get(aTHX_ sv, mg); |
b77f7d40 | 199 | |
58f82c5c DM |
200 | /* guard against magic having been deleted - eg FETCH calling |
201 | * untie */ | |
f9c6fee5 | 202 | if (!SvMAGIC(sv)) { |
a623f893 FC |
203 | /* recalculate flags */ |
204 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
58f82c5c | 205 | break; |
f9c6fee5 | 206 | } |
b77f7d40 | 207 | |
f9c6fee5 | 208 | /* recalculate flags if this entry was deleted. */ |
ff76feab | 209 | if (mg->mg_flags & MGf_GSKIP) |
a623f893 FC |
210 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= |
211 | ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
a0d0e21e | 212 | } |
7d1328bb | 213 | else if (vtbl == &PL_vtbl_utf8) { |
b949b68f DM |
214 | /* get-magic can reallocate the PV, unless there's only taint |
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); | |
7d1328bb | 231 | } |
ff76feab | 232 | |
f9c6fee5 | 233 | mg = nextmg; |
ff76feab | 234 | |
0723351e | 235 | if (have_new) { |
ff76feab AMS |
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) { | |
0723351e | 239 | have_new = 0; |
ff76feab AMS |
240 | mg = cur; |
241 | head = newmg; | |
242 | } | |
243 | } | |
244 | ||
245 | /* Were any new entries added? */ | |
0723351e NC |
246 | if (!have_new && (newmg = SvMAGIC(sv)) != head) { |
247 | have_new = 1; | |
ff76feab AMS |
248 | cur = mg; |
249 | mg = newmg; | |
a623f893 FC |
250 | /* recalculate flags */ |
251 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
760ac839 | 252 | } |
79072805 | 253 | } |
463ee0b2 | 254 | |
a9844598 CS |
255 | if (saved) |
256 | restore_magic(INT2PTR(void *, (IV)mgs_ix)); | |
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; |
463ee0b2 | 284 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
a0d0e21e LW |
285 | if (mg->mg_flags & MGf_GSKIP) { |
286 | mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */ | |
a623f893 | 287 | (SSPTR(mgs_ix, MGS*))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); |
a0d0e21e | 288 | } |
e0a73de4 | 289 | if (PL_localizing == 2 |
b5ed8c44 | 290 | && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
e7cbf6c6 | 291 | continue; |
2b260de0 | 292 | if (vtbl && vtbl->svt_set) |
16c91539 | 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; |
2b260de0 | 322 | if (vtbl && vtbl->svt_len) { |
35a4481c | 323 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
455ece5e | 324 | save_magic(mgs_ix, sv); |
a0d0e21e | 325 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 326 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 327 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
85e6fe83 LW |
328 | return len; |
329 | } | |
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; |
2b260de0 | 345 | if (vtbl && vtbl->svt_len) { |
35a4481c AL |
346 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
347 | I32 len; | |
455ece5e | 348 | save_magic(mgs_ix, sv); |
93965878 | 349 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 350 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 351 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
93965878 NIS |
352 | return len; |
353 | } | |
354 | } | |
355 | ||
356 | switch(SvTYPE(sv)) { | |
357 | case SVt_PVAV: | |
502c6561 | 358 | return AvFILLp((const AV *) sv); /* Fallback to non-tied array */ |
93965878 NIS |
359 | case SVt_PVHV: |
360 | /* FIXME */ | |
361 | default: | |
cea2e8a9 | 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; |
a0d0e21e | 389 | /* omit GSKIP -- never set here */ |
727405f8 | 390 | |
8ac77ac9 NC |
391 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
392 | ||
2b260de0 | 393 | if (vtbl && vtbl->svt_clear) |
16c91539 | 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) { | |
407 | MAGIC *mg; | |
408 | ||
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 | } | |
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; |
68795e93 | 481 | if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){ |
16c91539 | 482 | count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen); |
68795e93 | 483 | } |
823a54a3 AL |
484 | else { |
485 | const char type = mg->mg_type; | |
1e73acc8 | 486 | if (isUPPER(type) && type != PERL_MAGIC_uvar) { |
823a54a3 AL |
487 | sv_magic(nsv, |
488 | (type == PERL_MAGIC_tied) | |
489 | ? SvTIED_obj(sv, mg) | |
27deb0cf | 490 | : mg->mg_obj, |
823a54a3 AL |
491 | toLOWER(type), key, klen); |
492 | count++; | |
493 | } | |
79072805 | 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 JD |
521 | if (nsv == DEFSV) |
522 | return; | |
523 | ||
0cbee0a4 | 524 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
2b1b43ea | 525 | const MGVTBL* const vtbl = mg->mg_virtual; |
e0a73de4 | 526 | if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
0cbee0a4 | 527 | continue; |
0cbee0a4 | 528 | |
a5063e7c | 529 | if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local) |
16c91539 | 530 | (void)vtbl->svt_local(aTHX_ nsv, mg); |
a5063e7c | 531 | else |
0cbee0a4 DM |
532 | sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl, |
533 | mg->mg_ptr, mg->mg_len); | |
a5063e7c | 534 | |
0cbee0a4 | 535 | /* container types should remain read-only across localization */ |
9ff3e6d8 | 536 | SvFLAGS(nsv) |= SvREADONLY(sv); |
0cbee0a4 DM |
537 | } |
538 | ||
539 | if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) { | |
540 | SvFLAGS(nsv) |= SvMAGICAL(sv); | |
af7df257 | 541 | if (setmagic) { |
9711599e CS |
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) | |
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 Z |
562 | if (mg->mg_flags & MGf_REFCOUNTED) |
563 | SvREFCNT_dec(mg->mg_obj); | |
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) { |
79072805 | 584 | moremagic = mg->mg_moremagic; |
d9088386 | 585 | mg_free_struct(sv, mg); |
c826f41b | 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) { | |
d9088386 Z |
607 | moremg = mg->mg_moremagic; |
608 | if (mg->mg_type == how) { | |
19742f39 | 609 | MAGIC *newhead; |
d9088386 Z |
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 | } | |
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) { | |
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 | } | |
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); |
0bd48802 | 673 | if (rx) { |
fa531f32 DM |
674 | const SSize_t n = (SSize_t)mg->mg_obj; |
675 | if (n == '+') { /* @+ */ | |
a678b0e4 | 676 | /* return the number possible */ |
07bc277f | 677 | return RX_NPARENS(rx); |
27deb0cf | 678 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
07bc277f | 679 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 YO |
680 | |
681 | /* return the last filled */ | |
f46c4081 | 682 | while ( paren >= 0 |
07bc277f NC |
683 | && (RX_OFFS(rx)[paren].start == -1 |
684 | || RX_OFFS(rx)[paren].end == -1) ) | |
f46c4081 | 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 | } | |
0bd48802 | 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); |
0bd48802 | 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); |
a10eae29 FC |
714 | SSize_t s; |
715 | SSize_t t; | |
0bd48802 AL |
716 | if (paren < 0) |
717 | return 0; | |
07bc277f NC |
718 | if (paren <= (I32)RX_NPARENS(rx) && |
719 | (s = RX_OFFS(rx)[paren].start) != -1 && | |
720 | (t = RX_OFFS(rx)[paren].end) != -1) | |
0bd48802 | 721 | { |
a10eae29 | 722 | SSize_t i; |
27deb0cf | 723 | |
fa531f32 | 724 | if (n == '+') /* @+ */ |
0bd48802 | 725 | i = t; |
fa531f32 | 726 | else if (n == '-') /* @- */ |
0bd48802 | 727 | i = s; |
27deb0cf YO |
728 | else { /* @^CAPTURE @{^CAPTURE} */ |
729 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
730 | return 0; | |
731 | } | |
0bd48802 | 732 | |
a10eae29 | 733 | if (RX_MATCH_UTF8(rx)) { |
07bc277f | 734 | const char * const b = RX_SUBBEG(rx); |
0bd48802 | 735 | if (b) |
6502e081 DM |
736 | i = RX_SUBCOFFSET(rx) + |
737 | utf8_length((U8*)b, | |
738 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
0bd48802 | 739 | } |
727405f8 | 740 | |
a10eae29 | 741 | sv_setuv(sv, i); |
232af1f8 | 742 | return 0; |
1aa99e6b | 743 | } |
0bd48802 | 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); \ | |
8e6b4db6 PC |
767 | while (len > 0 && isSPACE(p[len-1])) \ |
768 | --len; \ | |
769 | SvCUR_set(sv, len); \ | |
770 | p[len] = '\0'; \ | |
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))) |
e03e82a0 | 780 | sv_set_undef(sv); |
8b850bd5 | 781 | else { |
b2aed775 | 782 | SvPVCLEAR(sv); |
8b850bd5 NC |
783 | SvUTF8_off(sv); |
784 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
20439bc7 | 785 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); |
8b850bd5 NC |
786 | assert(value); |
787 | sv_catsv(sv, value); | |
788 | } | |
789 | sv_catpvs(sv, "\0"); | |
790 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
20439bc7 | 791 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); |
8b850bd5 NC |
792 | assert(value); |
793 | sv_catsv(sv, value); | |
794 | } | |
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), "")) { | |
809 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); | |
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) | |
880 | tgtsv = sv_newmortal(); | |
881 | errstr = my_strerror(errnum); | |
882 | if(errstr) { | |
883 | sv_setpv(tgtsv, errstr); | |
884 | fixup_errno_string(tgtsv); | |
885 | } else { | |
886 | SvPVCLEAR(tgtsv); | |
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 */ |
f2da823f | 921 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
e03e82a0 DM |
922 | else |
923 | sv_set_undef(sv); | |
125b9982 NT |
924 | if (SvTAINTED(PL_bodytarget)) |
925 | SvTAINTED_on(sv); | |
748a9306 | 926 | break; |
e5218da5 | 927 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
823a54a3 | 928 | if (nextchar == '\0') { |
e5218da5 GA |
929 | sv_setiv(sv, (IV)PL_minus_c); |
930 | } | |
823a54a3 | 931 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { |
e5218da5 GA |
932 | sv_setiv(sv, (IV)STATUS_NATIVE); |
933 | } | |
49460fe6 NIS |
934 | break; |
935 | ||
79072805 | 936 | case '\004': /* ^D */ |
aea4f609 | 937 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
79072805 | 938 | break; |
28f23441 | 939 | case '\005': /* ^E */ |
6c6eab55 KW |
940 | if (nextchar != '\0') { |
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! */ | |
990 | break; | |
4f4ff3a7 KW |
991 | #endif /* End of platforms with special handling for $^E; others just fall |
992 | through to $! */ | |
2165bd23 | 993 | /* FALLTHROUGH */ |
46f3e16c KW |
994 | |
995 | case '!': | |
996 | { | |
5f1b979d | 997 | dSAVE_ERRNO; |
46f3e16c | 998 | #ifdef VMS |
5f1b979d | 999 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$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; | |
46f3e16c KW |
1020 | } |
1021 | ||
1022 | SvRTRIM(sv); | |
1023 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1024 | break; | |
1025 | ||
79072805 | 1026 | case '\006': /* ^F */ |
9f601cf3 TC |
1027 | if (nextchar == '\0') { |
1028 | sv_setiv(sv, (IV)PL_maxsysfd); | |
1029 | } | |
79072805 | 1030 | break; |
9ebf26ad FR |
1031 | case '\007': /* ^GLOBAL_PHASE */ |
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 */ |
5d382c25 | 1038 | sv_setuv(sv, PL_hints); |
a0d0e21e | 1039 | break; |
9d116dd7 | 1040 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
120f7abe | 1041 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
79072805 | 1042 | break; |
8561ea1d FC |
1043 | case '\014': /* ^LAST_FH */ |
1044 | if (strEQ(remaining, "AST_FH")) { | |
745e740c | 1045 | if (PL_last_in_gv && (SV*)PL_last_in_gv != &PL_sv_undef) { |
8561ea1d FC |
1046 | assert(isGV_with_GP(PL_last_in_gv)); |
1047 | SV_CHECK_THINKFIRST_COW_DROP(sv); | |
1048 | prepare_SV_for_RV(sv); | |
1049 | SvOK_off(sv); | |
1050 | SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv)); | |
1051 | SvROK_on(sv); | |
1052 | sv_rvweaken(sv); | |
1053 | } | |
3773545d DM |
1054 | else |
1055 | sv_set_undef(sv); | |
8561ea1d FC |
1056 | } |
1057 | break; | |
ac27b0f5 | 1058 | case '\017': /* ^O & ^OPEN */ |
823a54a3 | 1059 | if (nextchar == '\0') { |
ac27b0f5 | 1060 | sv_setpv(sv, PL_osname); |
3511154c DM |
1061 | SvTAINTED_off(sv); |
1062 | } | |
823a54a3 | 1063 | else if (strEQ(remaining, "PEN")) { |
8b850bd5 | 1064 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); |
ac27b0f5 | 1065 | } |
28f23441 | 1066 | break; |
9ebf26ad | 1067 | case '\020': |
a6d0b1b5 | 1068 | sv_setiv(sv, (IV)PL_perldb); |
79072805 | 1069 | break; |
fb73857a | 1070 | case '\023': /* ^S */ |
f512d242 | 1071 | if (nextchar == '\0') { |
bc177e6b | 1072 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) |
0c34ef67 | 1073 | SvOK_off(sv); |
3280af22 | 1074 | else if (PL_in_eval) |
6dc8a9e4 | 1075 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); |
a4268c0a AMS |
1076 | else |
1077 | sv_setiv(sv, 0); | |
d58bf5aa | 1078 | } |
f512d242 KW |
1079 | else if (strEQ(remaining, "AFE_LOCALES")) { |
1080 | ||
1081 | #if ! defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE) | |
1082 | ||
1083 | sv_setuv(sv, (UV) 1); | |
1084 | ||
1085 | #else | |
1086 | sv_setuv(sv, (UV) 0); | |
1087 | ||
1088 | #endif | |
1089 | ||
1090 | } | |
fb73857a | 1091 | break; |
79072805 | 1092 | case '\024': /* ^T */ |
823a54a3 | 1093 | if (nextchar == '\0') { |
88e89b8a | 1094 | #ifdef BIG_TIME |
7c36658b | 1095 | sv_setnv(sv, PL_basetime); |
88e89b8a | 1096 | #else |
7c36658b | 1097 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 1098 | #endif |
7c36658b | 1099 | } |
823a54a3 | 1100 | else if (strEQ(remaining, "AINT")) |
284167a5 S |
1101 | sv_setiv(sv, TAINTING_get |
1102 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) | |
9aa05f58 | 1103 | : 0); |
7c36658b | 1104 | break; |
e07ea26a | 1105 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
823a54a3 | 1106 | if (strEQ(remaining, "NICODE")) |
a05d7ebb | 1107 | sv_setuv(sv, (UV) PL_unicode); |
823a54a3 | 1108 | else if (strEQ(remaining, "TF8LOCALE")) |
7cebcbc0 | 1109 | sv_setuv(sv, (UV) PL_utf8locale); |
e07ea26a NC |
1110 | else if (strEQ(remaining, "TF8CACHE")) |
1111 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
1112 | break; |
1113 | case '\027': /* ^W & $^WARNING_BITS */ | |
823a54a3 | 1114 | if (nextchar == '\0') |
8298454c | 1115 | sv_setiv(sv, (IV)cBOOL(PL_dowarn & G_WARN_ON)); |
823a54a3 | 1116 | else if (strEQ(remaining, "ARNING_BITS")) { |
013b78e8 | 1117 | if (PL_compiling.cop_warnings == pWARN_NONE) { |
4438c4b7 | 1118 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; |
013b78e8 RGS |
1119 | } |
1120 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
e03e82a0 | 1121 | goto set_undef; |
013b78e8 | 1122 | } |
d3a7d8c7 | 1123 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
006c1a1d | 1124 | sv_setpvn(sv, WARN_ALLstring, WARNsize); |
ac27b0f5 | 1125 | } |
4438c4b7 | 1126 | else { |
72dc9ed5 NC |
1127 | sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1), |
1128 | *PL_compiling.cop_warnings); | |
ac27b0f5 | 1129 | } |
4438c4b7 | 1130 | } |
79072805 | 1131 | break; |
79072805 | 1132 | case '+': |
aaa362c4 | 1133 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
2c7b5d76 DM |
1134 | paren = RX_LASTPAREN(rx); |
1135 | if (paren) | |
1136 | goto do_numbuf_fetch; | |
79072805 | 1137 | } |
e03e82a0 | 1138 | goto set_undef; |
a01268b5 JH |
1139 | case '\016': /* ^N */ |
1140 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { | |
2c7b5d76 DM |
1141 | paren = RX_LASTCLOSEPAREN(rx); |
1142 | if (paren) | |
1143 | goto do_numbuf_fetch; | |
a01268b5 | 1144 | } |
e03e82a0 | 1145 | goto set_undef; |
79072805 | 1146 | case '.': |
3280af22 | 1147 | if (GvIO(PL_last_in_gv)) { |
357c8808 | 1148 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); |
79072805 | 1149 | } |
79072805 LW |
1150 | break; |
1151 | case '?': | |
809a5acc | 1152 | { |
809a5acc | 1153 | sv_setiv(sv, (IV)STATUS_CURRENT); |
ff0cee69 | 1154 | #ifdef COMPLEX_STATUS |
41cb7b2b | 1155 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
1156 | LvTARGOFF(sv) = PL_statusvalue; |
1157 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1158 | #endif |
809a5acc | 1159 | } |
79072805 LW |
1160 | break; |
1161 | case '^': | |
acbe1b9d | 1162 | if (GvIOp(PL_defoutgv)) |
099be4f1 | 1163 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); |
79072805 LW |
1164 | if (s) |
1165 | sv_setpv(sv,s); | |
1166 | else { | |
3280af22 | 1167 | sv_setpv(sv,GvENAME(PL_defoutgv)); |
cb421d5e | 1168 | sv_catpvs(sv,"_TOP"); |
79072805 LW |
1169 | } |
1170 | break; | |
1171 | case '~': | |
acbe1b9d | 1172 | if (GvIOp(PL_defoutgv)) |
0daa599b | 1173 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); |
79072805 | 1174 | if (!s) |
3280af22 | 1175 | s = GvENAME(PL_defoutgv); |
79072805 LW |
1176 | sv_setpv(sv,s); |
1177 | break; | |
79072805 | 1178 | case '=': |
099be4f1 | 1179 | if (GvIO(PL_defoutgv)) |
0daa599b | 1180 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); |
79072805 LW |
1181 | break; |
1182 | case '-': | |
099be4f1 | 1183 | if (GvIO(PL_defoutgv)) |
0daa599b | 1184 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); |
79072805 LW |
1185 | break; |
1186 | case '%': | |
099be4f1 | 1187 | if (GvIO(PL_defoutgv)) |
0daa599b | 1188 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); |
79072805 | 1189 | break; |
79072805 | 1190 | case ':': |
79072805 LW |
1191 | case '/': |
1192 | break; | |
1193 | case '[': | |
e1dccc0d | 1194 | sv_setiv(sv, 0); |
79072805 LW |
1195 | break; |
1196 | case '|': | |
099be4f1 | 1197 | if (GvIO(PL_defoutgv)) |
0daa599b | 1198 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); |
79072805 | 1199 | break; |
79072805 | 1200 | case '\\': |
b2ce0fda | 1201 | if (PL_ors_sv) |
f28098ff | 1202 | sv_copypv(sv, PL_ors_sv); |
4bac9ae4 | 1203 | else |
e03e82a0 | 1204 | goto set_undef; |
79072805 | 1205 | break; |
0e219455 | 1206 | case '$': /* $$ */ |
9cdac2a2 FC |
1207 | { |
1208 | IV const pid = (IV)PerlProc_getpid(); | |
19db9fb7 | 1209 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { |
9cdac2a2 FC |
1210 | /* never set manually, or at least not since last fork */ |
1211 | sv_setiv(sv, pid); | |
19db9fb7 Z |
1212 | /* never unsafe, even if reading in a tainted expression */ |
1213 | SvTAINTED_off(sv); | |
1214 | } | |
9cdac2a2 FC |
1215 | /* else a value has been assigned manually, so do nothing */ |
1216 | } | |
0e219455 | 1217 | break; |
79072805 | 1218 | case '<': |
dfff4baf | 1219 | sv_setuid(sv, PerlProc_getuid()); |
79072805 LW |
1220 | break; |
1221 | case '>': | |
dfff4baf | 1222 | sv_setuid(sv, PerlProc_geteuid()); |
79072805 LW |
1223 | break; |
1224 | case '(': | |
dfff4baf | 1225 | sv_setgid(sv, PerlProc_getgid()); |
79072805 LW |
1226 | goto add_groups; |
1227 | case ')': | |
dfff4baf | 1228 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1229 | add_groups: |
79072805 | 1230 | #ifdef HAS_GETGROUPS |
79072805 | 1231 | { |
57d7c65e | 1232 | Groups_t *gary = NULL; |
375ed12a JH |
1233 | I32 num_groups = getgroups(0, gary); |
1234 | if (num_groups > 0) { | |
19742f39 | 1235 | I32 i; |
375ed12a JH |
1236 | Newx(gary, num_groups, Groups_t); |
1237 | num_groups = getgroups(num_groups, gary); | |
1238 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1239 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1240 | Safefree(gary); |
1241 | } | |
79072805 | 1242 | } |
155aba94 | 1243 | (void)SvIOK_on(sv); /* what a wonderful hack! */ |
cd70abae | 1244 | #endif |
79072805 | 1245 | break; |
79072805 LW |
1246 | case '0': |
1247 | break; | |
1248 | } | |
a0d0e21e | 1249 | return 0; |
e03e82a0 DM |
1250 | |
1251 | set_undef: | |
1252 | sv_set_undef(sv); | |
1253 | return 0; | |
79072805 LW |
1254 | } |
1255 | ||
1256 | int | |
864dbfa3 | 1257 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1258 | { |
8772537c | 1259 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1260 | |
7918f24d NC |
1261 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1262 | ||
79072805 | 1263 | if (uf && uf->uf_val) |
24f81a43 | 1264 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1265 | return 0; |
1266 | } | |
1267 | ||
1268 | int | |
864dbfa3 | 1269 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1270 | { |
9ae3433d | 1271 | STRLEN len = 0, klen; |
12033064 | 1272 | const char * const key = MgPV_const(mg,klen); |
888a67f6 | 1273 | const char *s = ""; |
1e422769 | 1274 | |
7918f24d NC |
1275 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1276 | ||
613c63b4 | 1277 | SvGETMAGIC(sv); |
12033064 | 1278 | if (SvOK(sv)) { |
613c63b4 CS |
1279 | /* defined environment variables are byte strings; unfortunately |
1280 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1281 | (void)SvPV_force_nomg_nolen(sv); | |
1282 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1283 | if (SvUTF8(sv)) { | |
1284 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1285 | SvUTF8_off(sv); | |
1286 | } | |
1287 | s = SvPVX(sv); | |
1288 | len = SvCUR(sv); | |
12033064 CS |
1289 | } |
1290 | my_setenv(key, s); /* does the deed */ | |
1291 | ||
a0d0e21e LW |
1292 | #ifdef DYNAMIC_ENV_FETCH |
1293 | /* We just undefd an environment var. Is a replacement */ | |
1294 | /* waiting in the wings? */ | |
1295 | if (!len) { | |
6bd66ee9 | 1296 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
fabdb6c0 | 1297 | if (valp) |
4ab59fcc | 1298 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; |
a0d0e21e LW |
1299 | } |
1300 | #endif | |
1e422769 | 1301 | |
28542d8f | 1302 | #if !defined(OS2) && !defined(WIN32) && !defined(MSDOS) |
79072805 LW |
1303 | /* And you'll never guess what the dog had */ |
1304 | /* in its mouth... */ | |
284167a5 | 1305 | if (TAINTING_get) { |
1e422769 | 1306 | MgTAINTEDDIR_off(mg); |
1307 | #ifdef VMS | |
b2aed775 | 1308 | if (s && memEQs(key, klen, "DCL$PATH")) { |
b8ffc8df | 1309 | char pathbuf[256], eltbuf[256], *cp, *elt; |
1e422769 | 1310 | int i = 0, j = 0; |
1311 | ||
6fca0082 | 1312 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); |
b8ffc8df | 1313 | elt = eltbuf; |
1e422769 | 1314 | do { /* DCL$PATH may be a search list */ |
1315 | while (1) { /* as may dev portion of any element */ | |
1316 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1317 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1318 | cando_by_name(S_IWUSR,0,elt) ) { | |
1319 | MgTAINTEDDIR_on(mg); | |
1320 | return 0; | |
1321 | } | |
1322 | } | |
bd61b366 | 1323 | if ((cp = strchr(elt, ':')) != NULL) |
1e422769 | 1324 | *cp = '\0'; |
1325 | if (my_trnlnm(elt, eltbuf, j++)) | |
1326 | elt = eltbuf; | |
1327 | else | |
1328 | break; | |
1329 | } | |
1330 | j = 0; | |
1331 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1332 | } | |
1333 | #endif /* VMS */ | |
b2aed775 | 1334 | if (s && memEQs(key, klen, "PATH")) { |
8772537c | 1335 | const char * const strend = s + len; |
463ee0b2 | 1336 | |
70b484a8 DM |
1337 | /* set MGf_TAINTEDDIR if any component of the new path is |
1338 | * relative or world-writeable */ | |
463ee0b2 | 1339 | while (s < strend) { |
96827780 | 1340 | char tmpbuf[256]; |
c623ac67 | 1341 | Stat_t st; |
5f74f29c | 1342 | I32 i; |
83269ced CB |
1343 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1344 | const char path_sep = PL_perllib_sep; | |
f5a63d97 AL |
1345 | #else |
1346 | const char path_sep = ':'; | |
1347 | #endif | |
ba0a4150 | 1348 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
427eaa01 | 1349 | s, strend, path_sep, &i); |
463ee0b2 | 1350 | s++; |
bb7a0f54 | 1351 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ |
83269ced CB |
1352 | #ifdef __VMS |
1353 | /* no colon thus no device name -- assume relative path */ | |
1354 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1355 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1356 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 CB |
1357 | #else |
1358 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ | |
1359 | #endif | |
c6ed36e1 | 1360 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
8990e307 | 1361 | MgTAINTEDDIR_on(mg); |
1e422769 | 1362 | return 0; |
1363 | } | |
463ee0b2 | 1364 | } |
79072805 LW |
1365 | } |
1366 | } | |
28542d8f | 1367 | #endif /* neither OS2 nor WIN32 nor MSDOS */ |
1e422769 | 1368 | |
79072805 LW |
1369 | return 0; |
1370 | } | |
1371 | ||
1372 | int | |
864dbfa3 | 1373 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1374 | { |
7918f24d | 1375 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1376 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1377 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1378 | return 0; |
1379 | } | |
1380 | ||
88e89b8a | 1381 | int |
864dbfa3 | 1382 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1383 | { |
7918f24d | 1384 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1385 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1386 | #if defined(VMS) |
cea2e8a9 | 1387 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1388 | #else |
3280af22 | 1389 | if (PL_localizing) { |
fb73857a | 1390 | HE* entry; |
b0269e46 | 1391 | my_clearenv(); |
85fbaab2 NC |
1392 | hv_iterinit(MUTABLE_HV(sv)); |
1393 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
fb73857a | 1394 | I32 keylen; |
1395 | my_setenv(hv_iterkey(entry, &keylen), | |
85fbaab2 | 1396 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); |
fb73857a | 1397 | } |
1398 | } | |
1399 | #endif | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | int | |
864dbfa3 | 1404 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1405 | { |
7918f24d | 1406 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1407 | PERL_UNUSED_ARG(sv); |
1408 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1409 | #if defined(VMS) |
1410 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1411 | #else | |
1412 | my_clearenv(); | |
1413 | #endif | |
3e3baf6d | 1414 | return 0; |
66b1d557 HM |
1415 | } |
1416 | ||
64ca3a65 | 1417 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1418 | #ifdef HAS_SIGPROCMASK |
1419 | static void | |
1420 | restore_sigmask(pTHX_ SV *save_sv) | |
1421 | { | |
0bd48802 | 1422 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1423 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1424 | } |
1425 | #endif | |
66b1d557 | 1426 | int |
864dbfa3 | 1427 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1428 | { |
88e89b8a | 1429 | /* Are we fetching a signal entry? */ |
708854f2 | 1430 | int i = (I16)mg->mg_private; |
7918f24d NC |
1431 | |
1432 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1433 | ||
708854f2 | 1434 | if (!i) { |
84c7b88c BF |
1435 | STRLEN siglen; |
1436 | const char * sig = MgPV_const(mg, siglen); | |
1437 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1438 | } |
1439 | ||
e02bfb16 | 1440 | if (i > 0) { |
22c35a8c GS |
1441 | if(PL_psig_ptr[i]) |
1442 | sv_setsv(sv,PL_psig_ptr[i]); | |
88e89b8a | 1443 | else { |
46da273f | 1444 | Sighandler_t sigstate = rsignal_state(i); |
23ada85b | 1445 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
46da273f AL |
1446 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1447 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1448 | #endif |
1449 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
46da273f AL |
1450 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1451 | sigstate = SIG_DFL; | |
85b332e2 | 1452 | #endif |
88e89b8a | 1453 | /* cache state so we don't fetch it again */ |
8aad04aa | 1454 | if(sigstate == (Sighandler_t) SIG_IGN) |
6502358f | 1455 | sv_setpvs(sv,"IGNORE"); |
88e89b8a | 1456 | else |
e03e82a0 | 1457 | sv_set_undef(sv); |
46da273f | 1458 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
88e89b8a | 1459 | SvTEMP_off(sv); |
1460 | } | |
1461 | } | |
1462 | return 0; | |
1463 | } | |
1464 | int | |
864dbfa3 | 1465 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1466 | { |
7918f24d | 1467 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1468 | |
38a124f0 | 1469 | magic_setsig(NULL, mg); |
179c85a2 | 1470 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1471 | } |
3d37d572 | 1472 | |
dc37125b | 1473 | |
5e7940ce | 1474 | #ifdef PERL_USE_3ARG_SIGHANDLER |
dc37125b DM |
1475 | Signal_t |
1476 | Perl_csighandler(int sig, Siginfo_t *sip, void *uap) | |
1477 | { | |
1478 | Perl_csighandler3(sig, sip, uap); | |
1479 | } | |
8aad04aa | 1480 | #else |
dc37125b | 1481 | Signal_t |
0a8e0eff | 1482 | Perl_csighandler(int sig) |
dc37125b DM |
1483 | { |
1484 | Perl_csighandler3(sig, NULL, NULL); | |
1485 | } | |
8aad04aa | 1486 | #endif |
dc37125b DM |
1487 | |
1488 | Signal_t | |
1489 | Perl_csighandler1(int sig) | |
1490 | { | |
1491 | Perl_csighandler3(sig, NULL, NULL); | |
1492 | } | |
1493 | ||
1494 | /* Handler intended to directly handle signal calls from the kernel. | |
1495 | * (Depending on configuration, the kernel may actually call one of the | |
1496 | * wrappers csighandler() or csighandler1() instead.) | |
1497 | * It either queues up the signal or dispatches it immediately depending | |
1498 | * on whether safe signals are enabled and whether the signal is capable | |
1499 | * of being deferred (e.g. SEGV isn't). | |
1500 | */ | |
1501 | ||
1502 | Signal_t | |
1503 | Perl_csighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
0a8e0eff | 1504 | { |
1018e26f NIS |
1505 | #ifdef PERL_GET_SIG_CONTEXT |
1506 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1507 | #else | |
85b332e2 CL |
1508 | dTHX; |
1509 | #endif | |
5e7940ce DM |
1510 | |
1511 | #ifdef PERL_USE_3ARG_SIGHANDLER | |
ffb6256b JH |
1512 | #if defined(__cplusplus) && defined(__GNUC__) |
1513 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1514 | * parameters would be warned about. */ | |
1515 | PERL_UNUSED_ARG(sip); | |
1516 | PERL_UNUSED_ARG(uap); | |
1517 | #endif | |
1271a1be | 1518 | #endif |
5e7940ce | 1519 | |
23ada85b | 1520 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1521 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1522 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1523 | #endif |
2e34cc90 | 1524 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1525 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1526 | #ifdef KILL_BY_SIGPRC |
1527 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1528 | #else | |
1529 | exit(1); | |
1530 | #endif | |
1531 | #endif | |
406878dd | 1532 | if ( |
853d2c32 RGS |
1533 | #ifdef SIGILL |
1534 | sig == SIGILL || | |
1535 | #endif | |
1536 | #ifdef SIGBUS | |
1537 | sig == SIGBUS || | |
1538 | #endif | |
1539 | #ifdef SIGSEGV | |
1540 | sig == SIGSEGV || | |
1541 | #endif | |
1542 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) | |
4ffa73a3 | 1543 | /* Call the perl level handler now-- |
31c91b43 | 1544 | * with risk we may be in malloc() or being destructed etc. */ |
8a5e470b DM |
1545 | { |
1546 | if (PL_sighandlerp == Perl_sighandler) | |
1547 | /* default handler, so can call perly_sighandler() directly | |
1548 | * rather than via Perl_sighandler, passing the extra | |
1549 | * 'safe = false' arg | |
1550 | */ | |
ddb513d5 | 1551 | Perl_perly_sighandler(sig, NULL, NULL, 0 /* unsafe */); |
8a5e470b | 1552 | else |
5e7940ce | 1553 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1554 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1555 | #else |
8a5e470b | 1556 | (*PL_sighandlerp)(sig); |
92807b6d | 1557 | #endif |
8a5e470b | 1558 | } |
406878dd | 1559 | else { |
31c91b43 | 1560 | if (!PL_psig_pend) return; |
406878dd GA |
1561 | /* Set a flag to say this signal is pending, that is awaiting delivery after |
1562 | * the current Perl opcode completes */ | |
1563 | PL_psig_pend[sig]++; | |
1564 | ||
1565 | #ifndef SIG_PENDING_DIE_COUNT | |
1566 | # define SIG_PENDING_DIE_COUNT 120 | |
1567 | #endif | |
fe13d51d | 1568 | /* Add one to say _a_ signal is pending */ |
406878dd GA |
1569 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) |
1570 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1571 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
1572 | } | |
0a8e0eff NIS |
1573 | } |
1574 | ||
2e34cc90 CL |
1575 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1576 | void | |
1577 | Perl_csighandler_init(void) | |
1578 | { | |
1579 | int sig; | |
27da23d5 | 1580 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1581 | |
1582 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1583 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1584 | dTHX; |
27da23d5 | 1585 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1586 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1587 | #endif |
1588 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1589 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1590 | #endif |
1591 | } | |
27da23d5 | 1592 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1593 | } |
1594 | #endif | |
1595 | ||
7fe50b8b LT |
1596 | #if defined HAS_SIGPROCMASK |
1597 | static void | |
1598 | unblock_sigmask(pTHX_ void* newset) | |
1599 | { | |
dc3bf405 | 1600 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1601 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1602 | } | |
1603 | #endif | |
1604 | ||
0a8e0eff NIS |
1605 | void |
1606 | Perl_despatch_signals(pTHX) | |
1607 | { | |
1608 | int sig; | |
1609 | PL_sig_pending = 0; | |
1610 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1611 | if (PL_psig_pend[sig]) { | |
d0166017 | 1612 | dSAVE_ERRNO; |
7fe50b8b | 1613 | #ifdef HAS_SIGPROCMASK |
55534442 LT |
1614 | /* From sigaction(2) (FreeBSD man page): |
1615 | * | Signal routines normally execute with the signal that | |
1616 | * | caused their invocation blocked, but other signals may | |
1617 | * | yet occur. | |
1618 | * Emulation of this behavior (from within Perl) is enabled | |
1619 | * using sigprocmask | |
1620 | */ | |
1621 | int was_blocked; | |
1622 | sigset_t newset, oldset; | |
1623 | ||
1624 | sigemptyset(&newset); | |
1625 | sigaddset(&newset, sig); | |
1626 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1627 | was_blocked = sigismember(&oldset, sig); | |
7fe50b8b LT |
1628 | if (!was_blocked) { |
1629 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1630 | ENTER; | |
1631 | SAVEFREESV(save_sv); | |
1632 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1633 | } | |
55534442 | 1634 | #endif |
25da4428 | 1635 | PL_psig_pend[sig] = 0; |
8a5e470b DM |
1636 | if (PL_sighandlerp == Perl_sighandler) |
1637 | /* default handler, so can call perly_sighandler() directly | |
1638 | * rather than via Perl_sighandler, passing the extra | |
1639 | * 'safe = true' arg | |
1640 | */ | |
1641 | Perl_perly_sighandler(sig, NULL, NULL, 1 /* safe */); | |
1642 | else | |
5e7940ce | 1643 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1644 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1645 | #else |
8a5e470b | 1646 | (*PL_sighandlerp)(sig); |
92807b6d | 1647 | #endif |
8a5e470b | 1648 | |
7fe50b8b | 1649 | #ifdef HAS_SIGPROCMASK |
55534442 | 1650 | if (!was_blocked) |
7fe50b8b | 1651 | LEAVE; |
55534442 | 1652 | #endif |
d0166017 | 1653 | RESTORE_ERRNO; |
0a8e0eff NIS |
1654 | } |
1655 | } | |
1656 | } | |
1657 | ||
38a124f0 | 1658 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1659 | int |
864dbfa3 | 1660 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1661 | { |
79072805 | 1662 | I32 i; |
cbbf8932 | 1663 | SV** svp = NULL; |
2d4fcd5e AJ |
1664 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1665 | * effects (due to closures). We must make sure that the new disposition | |
1666 | * is in place before it is called. | |
1667 | */ | |
cbbf8932 | 1668 | SV* to_dec = NULL; |
e72dc28c | 1669 | STRLEN len; |
2d4fcd5e AJ |
1670 | #ifdef HAS_SIGPROCMASK |
1671 | sigset_t set, save; | |
1672 | SV* save_sv; | |
1673 | #endif | |
eb578fdb | 1674 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1675 | |
1676 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1677 | ||
748a9306 | 1678 | if (*s == '_') { |
84c7b88c | 1679 | if (memEQs(s, len, "__DIE__")) |
3280af22 | 1680 | svp = &PL_diehook; |
84c7b88c | 1681 | else if (memEQs(s, len, "__WARN__") |
38a124f0 NC |
1682 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { |
1683 | /* Merge the existing behaviours, which are as follows: | |
1684 | magic_setsig, we always set svp to &PL_warnhook | |
1685 | (hence we always change the warnings handler) | |
1686 | For magic_clearsig, we don't change the warnings handler if it's | |
1687 | set to the &PL_warnhook. */ | |
3280af22 | 1688 | svp = &PL_warnhook; |
84c7b88c BF |
1689 | } else if (sv) { |
1690 | SV *tmp = sv_newmortal(); | |
1691 | Perl_croak(aTHX_ "No such hook: %s", | |
1692 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1693 | } | |
748a9306 | 1694 | i = 0; |
38a124f0 | 1695 | if (svp && *svp) { |
9289f461 RGS |
1696 | if (*svp != PERL_WARNHOOK_FATAL) |
1697 | to_dec = *svp; | |
cbbf8932 | 1698 | *svp = NULL; |
4633a7c4 | 1699 | } |
748a9306 LW |
1700 | } |
1701 | else { | |
708854f2 NC |
1702 | i = (I16)mg->mg_private; |
1703 | if (!i) { | |
84c7b88c | 1704 | i = whichsig_pvn(s, len); /* ...no, a brick */ |
58a26b12 | 1705 | mg->mg_private = (U16)i; |
708854f2 | 1706 | } |
86d86cad | 1707 | if (i <= 0) { |
84c7b88c BF |
1708 | if (sv) { |
1709 | SV *tmp = sv_newmortal(); | |
1710 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", | |
1711 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1712 | } | |
748a9306 LW |
1713 | return 0; |
1714 | } | |
2d4fcd5e AJ |
1715 | #ifdef HAS_SIGPROCMASK |
1716 | /* Avoid having the signal arrive at a bad time, if possible. */ | |
1717 | sigemptyset(&set); | |
1718 | sigaddset(&set,i); | |
1719 | sigprocmask(SIG_BLOCK, &set, &save); | |
1720 | ENTER; | |
9ff8e806 | 1721 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); |
2d4fcd5e AJ |
1722 | SAVEFREESV(save_sv); |
1723 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1724 | #endif | |
1725 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1726 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
27da23d5 | 1727 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1728 | #endif |
23ada85b | 1729 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
27da23d5 | 1730 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1731 | #endif |
2e34cc90 | 1732 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1733 | PL_sig_defaulting[i] = 0; |
2e34cc90 | 1734 | #endif |
2d4fcd5e | 1735 | to_dec = PL_psig_ptr[i]; |
38a124f0 NC |
1736 | if (sv) { |
1737 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1738 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
79fd3822 NC |
1739 | |
1740 | /* Signals don't change name during the program's execution, so once | |
1741 | they're cached in the appropriate slot of PL_psig_name, they can | |
1742 | stay there. | |
1743 | ||
1744 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1745 | at least, doing most of the work. */ | |
1746 | if (!PL_psig_name[i]) { | |
92d4124b TR |
1747 | const char* name = PL_sig_name[i]; |
1748 | PL_psig_name[i] = newSVpvn(name, strlen(name)); | |
79fd3822 NC |
1749 | SvREADONLY_on(PL_psig_name[i]); |
1750 | } | |
38a124f0 | 1751 | } else { |
79fd3822 | 1752 | SvREFCNT_dec(PL_psig_name[i]); |
38a124f0 NC |
1753 | PL_psig_name[i] = NULL; |
1754 | PL_psig_ptr[i] = NULL; | |
1755 | } | |
748a9306 | 1756 | } |
38a124f0 | 1757 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
2d4fcd5e | 1758 | if (i) { |
5c1546dc | 1759 | (void)rsignal(i, PL_csighandlerp); |
2d4fcd5e | 1760 | } |
748a9306 | 1761 | else |
b37c2d43 | 1762 | *svp = SvREFCNT_inc_simple_NN(sv); |
38a124f0 | 1763 | } else { |
9dfa190b NC |
1764 | if (sv && SvOK(sv)) { |
1765 | s = SvPV_force(sv, len); | |
1766 | } else { | |
1767 | sv = NULL; | |
1768 | } | |
84c7b88c | 1769 | if (sv && memEQs(s, len,"IGNORE")) { |
9dfa190b | 1770 | if (i) { |
23ada85b | 1771 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
9dfa190b NC |
1772 | PL_sig_ignoring[i] = 1; |
1773 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1774 | #else |
9dfa190b | 1775 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1776 | #endif |
9dfa190b | 1777 | } |
2d4fcd5e | 1778 | } |
84c7b88c | 1779 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { |
9dfa190b | 1780 | if (i) { |
2e34cc90 | 1781 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
9dfa190b NC |
1782 | PL_sig_defaulting[i] = 1; |
1783 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1784 | #else |
9dfa190b | 1785 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
2e34cc90 | 1786 | #endif |
9dfa190b NC |
1787 | } |
1788 | } | |
1789 | else { | |
1790 | /* | |
1791 | * We should warn if HINT_STRICT_REFS, but without | |
1792 | * access to a known hint bit in a known OP, we can't | |
1793 | * tell whether HINT_STRICT_REFS is in force or not. | |
1794 | */ | |
0687887e | 1795 | if (!memchr(s, ':', len) && !memchr(s, '\'', len)) |
9dfa190b NC |
1796 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), |
1797 | SV_GMAGIC); | |
1798 | if (i) | |
1799 | (void)rsignal(i, PL_csighandlerp); | |
1800 | else | |
1801 | *svp = SvREFCNT_inc_simple_NN(sv); | |
136e0459 | 1802 | } |
748a9306 | 1803 | } |
9dfa190b | 1804 | |
2d4fcd5e AJ |
1805 | #ifdef HAS_SIGPROCMASK |
1806 | if(i) | |
1807 | LEAVE; | |
1808 | #endif | |
ef8d46e8 | 1809 | SvREFCNT_dec(to_dec); |
79072805 LW |
1810 | return 0; |
1811 | } | |
64ca3a65 | 1812 | #endif /* !PERL_MICRO */ |
79072805 LW |
1813 | |
1814 | int | |
864dbfa3 | 1815 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1816 | { |
7918f24d | 1817 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1818 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1819 | |
89c14e2e | 1820 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1821 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
89c14e2e BB |
1822 | return 0; |
1823 | ||
0e446081 | 1824 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1825 | } |
1826 | ||
0e446081 | 1827 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1828 | int |
52b45067 RD |
1829 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1830 | { | |
52b45067 | 1831 | HV* stash; |
7918f24d NC |
1832 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1833 | ||
52b45067 | 1834 | /* Bail out if destruction is going on */ |
627364f1 | 1835 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1836 | |
0e446081 NC |
1837 | if (sv) |
1838 | av_clear(MUTABLE_AV(sv)); | |
52b45067 | 1839 | |
6624142a FC |
1840 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1841 | /* This occurs with setisa_elem magic, which calls this | |
1842 | same function. */ | |
1843 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
1844 | ||
316ebaf2 | 1845 | assert(mg); |
6624142a FC |
1846 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1847 | SV **svp = AvARRAY((AV *)mg->mg_obj); | |
1848 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1849 | while (items--) { | |
1850 | stash = GvSTASH((GV *)*svp++); | |
1851 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1852 | } | |
1853 | ||
1854 | return 0; | |
1855 | } | |
1856 | ||
52b45067 | 1857 | stash = GvSTASH( |
6624142a | 1858 | (const GV *)mg->mg_obj |
52b45067 RD |
1859 | ); |
1860 | ||
00169e2c FC |
1861 | /* The stash may have been detached from the symbol table, so check its |
1862 | name before doing anything. */ | |
1863 | if (stash && HvENAME_get(stash)) | |
5562fa71 | 1864 | mro_isa_changed_in(stash); |
52b45067 RD |
1865 | |
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | int | |
864dbfa3 | 1870 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1871 | { |
85fbaab2 | 1872 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1873 | I32 i = 0; |
7918f24d NC |
1874 | |
1875 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1876 | PERL_UNUSED_ARG(mg); |
7719e241 | 1877 | |
6ff81951 | 1878 | if (hv) { |
497b47a8 | 1879 | (void) hv_iterinit(hv); |
ad64d0ec | 1880 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1b95d04f | 1881 | i = HvUSEDKEYS(hv); |
497b47a8 JH |
1882 | else { |
1883 | while (hv_iternext(hv)) | |
1884 | i++; | |
1885 | } | |
6ff81951 GS |
1886 | } |
1887 | ||
1888 | sv_setiv(sv, (IV)i); | |
1889 | return 0; | |
1890 | } | |
1891 | ||
1892 | int | |
864dbfa3 | 1893 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1894 | { |
7918f24d | 1895 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1896 | PERL_UNUSED_ARG(mg); |
946ec16e | 1897 | if (LvTARG(sv)) { |
85fbaab2 | 1898 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e | 1899 | } |
1900 | return 0; | |
ac27b0f5 | 1901 | } |
946ec16e | 1902 | |
efaf3674 | 1903 | /* |
3f620621 | 1904 | =for apidoc_section $magic |
efaf3674 DM |
1905 | =for apidoc magic_methcall |
1906 | ||
1907 | Invoke a magic method (like FETCH). | |
1908 | ||
2baee27b FC |
1909 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1910 | ||
1911 | C<meth> is the name of the method to call. | |
1912 | ||
1913 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1914 | ||
1915 | The C<flags> can be: | |
1916 | ||
1917 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1918 | return a value | |
1919 | G_UNDEF_FILL fill the stack with argc pointers to | |
1920 | PL_sv_undef | |
1921 | ||
1922 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1923 | |
796b6530 | 1924 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1925 | |
1926 | ||
1927 | =cut | |
1928 | */ | |
1929 | ||
1930 | SV* | |
36925d9e | 1931 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
046b0c7d | 1932 | U32 argc, ...) |
a0d0e21e LW |
1933 | { |
1934 | dSP; | |
efaf3674 | 1935 | SV* ret = NULL; |
463ee0b2 | 1936 | |
7918f24d NC |
1937 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1938 | ||
efaf3674 | 1939 | ENTER; |
d1d7a15d NC |
1940 | |
1941 | if (flags & G_WRITING_TO_STDERR) { | |
1942 | SAVETMPS; | |
1943 | ||
2782061f | 1944 | save_re_context(); |
d1d7a15d NC |
1945 | SAVESPTR(PL_stderrgv); |
1946 | PL_stderrgv = NULL; | |
1947 | } | |
1948 | ||
efaf3674 | 1949 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1950 | PUSHMARK(SP); |
efaf3674 | 1951 | |
052a7c76 DM |
1952 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1953 | assert(argc <= I32_MAX); | |
1954 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1955 | PUSHs(SvTIED_obj(sv, mg)); |
1956 | if (flags & G_UNDEF_FILL) { | |
1957 | while (argc--) { | |
efaf3674 | 1958 | PUSHs(&PL_sv_undef); |
93965878 | 1959 | } |
67549bd2 | 1960 | } else if (argc > 0) { |
046b0c7d NC |
1961 | va_list args; |
1962 | va_start(args, argc); | |
1963 | ||
1964 | do { | |
35bc1e35 JK |
1965 | SV *const this_sv = va_arg(args, SV *); |
1966 | PUSHs(this_sv); | |
046b0c7d NC |
1967 | } while (--argc); |
1968 | ||
1969 | va_end(args); | |
88e89b8a | 1970 | } |
463ee0b2 | 1971 | PUTBACK; |
efaf3674 | 1972 | if (flags & G_DISCARD) { |
36925d9e | 1973 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1974 | } |
1975 | else { | |
36925d9e | 1976 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
efaf3674 DM |
1977 | ret = *PL_stack_sp--; |
1978 | } | |
1979 | POPSTACK; | |
d1d7a15d NC |
1980 | if (flags & G_WRITING_TO_STDERR) |
1981 | FREETMPS; | |
efaf3674 DM |
1982 | LEAVE; |
1983 | return ret; | |
1984 | } | |
1985 | ||
efaf3674 | 1986 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 1987 | |
efaf3674 | 1988 | STATIC SV* |
36925d9e | 1989 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
1990 | int n, SV *val) |
1991 | { | |
efaf3674 DM |
1992 | SV* arg1 = NULL; |
1993 | ||
1994 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
1995 | ||
1996 | if (mg->mg_ptr) { | |
1997 | if (mg->mg_len >= 0) { | |
db4b3a1d | 1998 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
efaf3674 DM |
1999 | } |
2000 | else if (mg->mg_len == HEf_SVKEY) | |
2001 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
2002 | } | |
2003 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
db4b3a1d | 2004 | arg1 = newSViv((IV)(mg->mg_len)); |
efaf3674 DM |
2005 | sv_2mortal(arg1); |
2006 | } | |
2007 | if (!arg1) { | |
046b0c7d | 2008 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 2009 | } |
046b0c7d | 2010 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e | 2011 | } |
2012 | ||
76e3520e | 2013 | STATIC int |
36925d9e | 2014 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 2015 | { |
efaf3674 | 2016 | SV* ret; |
463ee0b2 | 2017 | |
7918f24d NC |
2018 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
2019 | ||
efaf3674 DM |
2020 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
2021 | if (ret) | |
2022 | sv_setsv(sv, ret); | |
a0d0e21e LW |
2023 | return 0; |
2024 | } | |
463ee0b2 | 2025 | |
a0d0e21e | 2026 | int |
864dbfa3 | 2027 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2028 | { |
7918f24d NC |
2029 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
2030 | ||
fd69380d | 2031 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
a0d0e21e | 2032 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 2033 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
2034 | return 0; |
2035 | } | |
2036 | ||
2037 | int | |
864dbfa3 | 2038 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 2039 | { |
b112cff9 DM |
2040 | MAGIC *tmg; |
2041 | SV *val; | |
7918f24d NC |
2042 | |
2043 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2044 | ||
b112cff9 DM |
2045 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2046 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2047 | * public flags indicate its value based on copying from $val. Doing | |
2048 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2049 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2050 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2051 | * enabled, even though taint magic is in the chain. In which case, | |
2052 | * fake up a temporary tainted value (this is easier than temporarily | |
2053 | * re-enabling magic on sv). */ | |
2054 | ||
284167a5 | 2055 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
b112cff9 DM |
2056 | && (tmg->mg_len & 1)) |
2057 | { | |
2058 | val = sv_mortalcopy(sv); | |
2059 | SvTAINTED_on(val); | |
2060 | } | |
2061 | else | |
2062 | val = sv; | |
2063 | ||
36925d9e | 2064 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2065 | return 0; |
2066 | } | |
2067 | ||
2068 | int | |
864dbfa3 | 2069 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2070 | { |
7918f24d NC |
2071 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2072 | ||
4c13be3f | 2073 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2074 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2075 | } |
463ee0b2 | 2076 | |
93965878 NIS |
2077 | |
2078 | U32 | |
864dbfa3 | 2079 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2080 | { |
22846ab4 | 2081 | I32 retval = 0; |
efaf3674 | 2082 | SV* retsv; |
93965878 | 2083 | |
7918f24d NC |
2084 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2085 | ||
36925d9e | 2086 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 DM |
2087 | if (retsv) { |
2088 | retval = SvIV(retsv)-1; | |
22846ab4 AB |
2089 | if (retval < -1) |
2090 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2091 | } |
22846ab4 | 2092 | return (U32) retval; |
93965878 NIS |
2093 | } |
2094 | ||
cea2e8a9 GS |
2095 | int |
2096 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2097 | { |
7918f24d NC |
2098 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2099 | ||
36925d9e | 2100 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2101 | return 0; |
2102 | } | |
2103 | ||
2104 | int | |
864dbfa3 | 2105 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2106 | { |
efaf3674 | 2107 | SV* ret; |
463ee0b2 | 2108 | |
7918f24d NC |
2109 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2110 | ||
36925d9e RZ |
2111 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
2112 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); | |
efaf3674 DM |
2113 | if (ret) |
2114 | sv_setsv(key,ret); | |
79072805 LW |
2115 | return 0; |
2116 | } | |
2117 | ||
2118 | int | |
1146e912 | 2119 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2120 | { |
7918f24d NC |
2121 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2122 | ||
36925d9e | 2123 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2124 | } |
a0d0e21e | 2125 | |
a3bcc51e TP |
2126 | SV * |
2127 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2128 | { | |
5fcbf73d | 2129 | SV *retval; |
ad64d0ec NC |
2130 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2131 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2132 | |
7918f24d NC |
2133 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2134 | ||
a3bcc51e TP |
2135 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2136 | SV *key; | |
bfcb3514 | 2137 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2138 | /* we are in an iteration so the hash cannot be empty */ |
2139 | return &PL_sv_yes; | |
2140 | /* no xhv_eiter so now use FIRSTKEY */ | |
2141 | key = sv_newmortal(); | |
ad64d0ec | 2142 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2143 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2144 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2145 | } | |
2146 | ||
2147 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2148 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2149 | if (!retval) |
5fcbf73d | 2150 | retval = &PL_sv_undef; |
a3bcc51e TP |
2151 | return retval; |
2152 | } | |
2153 | ||
a0d0e21e | 2154 | int |
864dbfa3 | 2155 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2156 | { |
089b5c60 | 2157 | SV **svp; |
7918f24d NC |
2158 | |
2159 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2160 | ||
089b5c60 NC |
2161 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2162 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2163 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2164 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2165 | } |
2166 | ||
2167 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2168 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a FC |
2169 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
2170 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); | |
089b5c60 | 2171 | |
8772537c | 2172 | if (svp && SvIOKp(*svp)) { |
88df5f01 FC |
2173 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2174 | if (o) { | |
2175 | #ifdef PERL_DEBUG_READONLY_OPS | |
2176 | Slab_to_rw(OpSLAB(o)); | |
2177 | #endif | |
2178 | /* set or clear breakpoint in the relevant control op */ | |
089b5c60 | 2179 | if (SvTRUE(sv)) |
88df5f01 | 2180 | o->op_flags |= OPf_SPECIAL; |
8772537c | 2181 | else |
88df5f01 FC |
2182 | o->op_flags &= ~OPf_SPECIAL; |
2183 | #ifdef PERL_DEBUG_READONLY_OPS | |
2184 | Slab_to_ro(OpSLAB(o)); | |
2185 | #endif | |
8772537c | 2186 | } |
5df8de69 | 2187 | } |
79072805 LW |
2188 | return 0; |
2189 | } | |
2190 | ||
2191 | int | |
8772537c | 2192 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2193 | { |
502c6561 | 2194 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2195 | |
2196 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2197 | ||
83bf042f | 2198 | if (obj) { |
e1dccc0d | 2199 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2200 | } else { |
3773545d | 2201 | sv_set_undef(sv); |
83bf042f | 2202 | } |
79072805 LW |
2203 | return 0; |
2204 | } | |
2205 | ||
2206 | int | |
864dbfa3 | 2207 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2208 | { |
502c6561 | 2209 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2210 | |
2211 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2212 | ||
83bf042f | 2213 | if (obj) { |
e1dccc0d | 2214 | av_fill(obj, SvIV(sv)); |
83bf042f | 2215 | } else { |
a2a5de95 NC |
2216 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2217 | "Attempt to set length of freed array"); | |
83bf042f NC |
2218 | } |
2219 | return 0; | |
2220 | } | |
2221 | ||
2222 | int | |
83f29afa VP |
2223 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2224 | { | |
83f29afa VP |
2225 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2226 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2227 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2228 | |
2229 | /* Reset the iterator when the array is cleared */ | |
4803e7f7 Z |
2230 | if (sizeof(IV) == sizeof(SSize_t)) { |
2231 | *((IV *) &(mg->mg_len)) = 0; | |
2232 | } else { | |
2233 | if (mg->mg_ptr) | |
2234 | *((IV *) mg->mg_ptr) = 0; | |
2235 | } | |
83f29afa VP |
2236 | |
2237 | return 0; | |
2238 | } | |
2239 | ||
2240 | int | |
83bf042f NC |
2241 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2242 | { | |
7918f24d | 2243 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2244 | PERL_UNUSED_ARG(sv); |
7918f24d | 2245 | |
94f3782b DM |
2246 | /* during global destruction, mg_obj may already have been freed */ |
2247 | if (PL_in_clean_all) | |
1ea47f64 | 2248 | return 0; |
94f3782b | 2249 | |
83bf042f NC |
2250 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2251 | ||
2252 | if (mg) { | |
2253 | /* arylen scalar holds a pointer back to the array, but doesn't own a | |
2254 | reference. Hence the we (the array) are about to go away with it | |
2255 | still pointing at us. Clear its pointer, else it would be pointing | |
2256 | at free memory. See the comment in sv_magic about reference loops, | |
2257 | and why it can't own a reference to us. */ | |
2258 | mg->mg_obj = 0; | |
2259 | } | |
a0d0e21e LW |
2260 | return 0; |
2261 | } | |
2262 | ||
2263 | int | |
864dbfa3 | 2264 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2265 | { |
16eb5365 | 2266 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2267 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2268 | |
2269 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2270 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2271 | |
6174b39a FC |
2272 | if (found && found->mg_len != -1) { |
2273 | STRLEN i = found->mg_len; | |
25fdce4a | 2274 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) |
6174b39a FC |
2275 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); |
2276 | sv_setuv(sv, i); | |
a0d0e21e | 2277 | return 0; |
a0d0e21e | 2278 | } |
3773545d | 2279 | sv_set_undef(sv); |
a0d0e21e LW |
2280 | return 0; |
2281 | } | |
2282 | ||
2283 | int | |
864dbfa3 | 2284 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2285 | { |
16eb5365 | 2286 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2287 | SSize_t pos; |
2288 | STRLEN len; | |
53d44271 | 2289 | MAGIC* found; |
aec43834 | 2290 | const char *s; |
a0d0e21e | 2291 | |
7918f24d | 2292 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2293 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2294 | |
96c2a8ff | 2295 | found = mg_find_mglob(lsv); |
3881461a | 2296 | if (!found) { |
a0d0e21e LW |
2297 | if (!SvOK(sv)) |
2298 | return 0; | |
96c2a8ff | 2299 | found = sv_magicext_mglob(lsv); |
a0d0e21e LW |
2300 | } |
2301 | else if (!SvOK(sv)) { | |
3881461a | 2302 | found->mg_len = -1; |
a0d0e21e LW |
2303 | return 0; |
2304 | } | |
aec43834 | 2305 | s = SvPV_const(lsv, len); |
a0d0e21e | 2306 | |
e1dccc0d | 2307 | pos = SvIV(sv); |
a0ed51b3 | 2308 | |
7e2040f0 | 2309 | if (DO_UTF8(lsv)) { |
19742f39 | 2310 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
a0ed51b3 LW |
2311 | if (ulen) |
2312 | len = ulen; | |
a0ed51b3 LW |
2313 | } |
2314 | ||
a0d0e21e LW |
2315 | if (pos < 0) { |
2316 | pos += len; | |
2317 | if (pos < 0) | |
2318 | pos = 0; | |
2319 | } | |
eb160463 | 2320 | else if (pos > (SSize_t)len) |
a0d0e21e | 2321 | pos = len; |
a0ed51b3 | 2322 | |
3881461a | 2323 | found->mg_len = pos; |
25fdce4a | 2324 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2325 | |
79072805 LW |
2326 | return 0; |
2327 | } | |
2328 | ||
2329 | int | |
864dbfa3 | 2330 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2331 | { |
2332 | STRLEN len; | |
35a4481c | 2333 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2334 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2335 | STRLEN offs = LvTARGOFF(sv); |
2336 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2337 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2338 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2339 | |
2340 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2341 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2342 | |
83f78d1a | 2343 | if (!translate_substr_offsets( |
4ddea69a | 2344 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
83f78d1a FC |
2345 | negoff ? -(IV)offs : (IV)offs, !negoff, |
2346 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
2347 | )) { | |
2348 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); | |
e03e82a0 | 2349 | sv_set_undef(sv); |
83f78d1a FC |
2350 | return 0; |
2351 | } | |
2352 | ||
9aa983d2 | 2353 | if (SvUTF8(lsv)) |
4ddea69a | 2354 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2355 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2356 | if (SvUTF8(lsv)) |
2ef4b674 | 2357 | SvUTF8_on(sv); |
6ff81951 GS |
2358 | return 0; |
2359 | } | |
2360 | ||
2361 | int | |
864dbfa3 | 2362 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2363 | { |
83f78d1a | 2364 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2365 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2366 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2367 | STRLEN lvoff = LvTARGOFF(sv); |
2368 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2369 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2370 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2371 | |
2372 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2373 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2374 | |
a74fb2cd FC |
2375 | SvGETMAGIC(lsv); |
2376 | if (SvROK(lsv)) | |
2377 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), | |
2378 | "Attempt to use reference as lvalue in substr" | |
2379 | ); | |
fc061ed8 FC |
2380 | SvPV_force_nomg(lsv,lsv_len); |
2381 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a FC |
2382 | if (!translate_substr_offsets( |
2383 | lsv_len, | |
2384 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2385 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
2386 | )) | |
2387 | Perl_croak(aTHX_ "substr outside of string"); | |
2388 | oldtarglen = lvlen; | |
1aa99e6b | 2389 | if (DO_UTF8(sv)) { |
73a087f0 | 2390 | sv_utf8_upgrade_nomg(lsv); |
d931b1be | 2391 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
a74fb2cd | 2392 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
7a385470 | 2393 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); |
9aa983d2 JH |
2394 | SvUTF8_on(lsv); |
2395 | } | |
0d336106 | 2396 | else if (SvUTF8(lsv)) { |
5fcbf73d | 2397 | const char *utf8; |
d931b1be | 2398 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
83f78d1a | 2399 | newtarglen = len; |
5fcbf73d | 2400 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); |
a74fb2cd | 2401 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); |
5fcbf73d | 2402 | Safefree(utf8); |
1aa99e6b | 2403 | } |
b76f3ce2 | 2404 | else { |
a74fb2cd | 2405 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
83f78d1a | 2406 | newtarglen = len; |
b76f3ce2 | 2407 | } |
83f78d1a FC |
2408 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2409 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2410 | |
79072805 LW |
2411 | return 0; |
2412 | } | |
2413 | ||
2414 | int | |
864dbfa3 | 2415 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2416 | { |
7918f24d | 2417 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2418 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2419 | #ifdef NO_TAINT_SUPPORT |
2420 | PERL_UNUSED_ARG(mg); | |
2421 | #endif | |
7918f24d | 2422 | |
64ff300b | 2423 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2424 | return 0; |
2425 | } | |
2426 | ||
2427 | int | |
864dbfa3 | 2428 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2429 | { |
7918f24d | 2430 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2431 | PERL_UNUSED_ARG(sv); |
7918f24d | 2432 | |
b01e650a | 2433 | /* update taint status */ |
284167a5 | 2434 | if (TAINT_get) |
b01e650a DM |
2435 | mg->mg_len |= 1; |
2436 | else | |
2437 | mg->mg_len &= ~1; | |
463ee0b2 LW |
2438 | return 0; |
2439 | } | |
2440 | ||
2441 | int | |
864dbfa3 | 2442 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2443 | { |
35a4481c | 2444 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2445 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2446 | |
2447 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2448 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2449 | |
1b92e694 | 2450 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2451 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2452 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2453 | |
6ff81951 GS |
2454 | return 0; |
2455 | } | |
2456 | ||
2457 | int | |
864dbfa3 | 2458 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2459 | { |
7918f24d | 2460 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2461 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2462 | do_vecset(sv); /* XXX slurp this routine */ |
2463 | return 0; | |
2464 | } | |
2465 | ||
13733cde FC |
2466 | SV * |
2467 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2468 | { |
a0714e2c | 2469 | SV *targ = NULL; |
13733cde FC |
2470 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2471 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2472 | assert(mg); | |
5f05dabc | 2473 | if (LvTARGLEN(sv)) { |
68dc0745 | 2474 | if (mg->mg_obj) { |
8772537c | 2475 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2476 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); |
6d822dc4 MS |
2477 | if (he) |
2478 | targ = HeVAL(he); | |
68dc0745 | 2479 | } |
bbfdc870 | 2480 | else if (LvSTARGOFF(sv) >= 0) { |
502c6561 | 2481 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2482 | if (LvSTARGOFF(sv) <= AvFILL(av)) |
ca58dfd9 FC |
2483 | { |
2484 | if (SvRMAGICAL(av)) { | |
2485 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2486 | targ = svp ? *svp : NULL; | |
2487 | } | |
2488 | else | |
bbfdc870 | 2489 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; |
ca58dfd9 | 2490 | } |
68dc0745 | 2491 | } |
46da273f | 2492 | if (targ && (targ != &PL_sv_undef)) { |
68dc0745 | 2493 | /* somebody else defined it for us */ |
2494 | SvREFCNT_dec(LvTARG(sv)); | |
b37c2d43 | 2495 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); |
68dc0745 | 2496 | LvTARGLEN(sv) = 0; |
2497 | SvREFCNT_dec(mg->mg_obj); | |
a0714e2c | 2498 | mg->mg_obj = NULL; |
68dc0745 | 2499 | mg->mg_flags &= ~MGf_REFCOUNTED; |
2500 | } | |
13733cde | 2501 | return targ; |
5f05dabc | 2502 | } |
71be2cbc | 2503 | else |
13733cde FC |
2504 | return LvTARG(sv); |
2505 | } | |
2506 | ||
2507 | int | |
2508 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2509 | { | |
2510 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2511 | ||
2512 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc | 2513 | return 0; |
2514 | } | |
2515 | ||
2516 | int | |
864dbfa3 | 2517 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2518 | { |
7918f24d | 2519 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2520 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2521 | if (LvTARGLEN(sv)) |
68dc0745 | 2522 | vivify_defelem(sv); |
2523 | if (LvTARG(sv)) { | |
5f05dabc | 2524 | sv_setsv(LvTARG(sv), sv); |
68dc0745 | 2525 | SvSETMAGIC(LvTARG(sv)); |
2526 | } | |
5f05dabc | 2527 | return 0; |
2528 | } | |
2529 | ||
71be2cbc | 2530 | void |
864dbfa3 | 2531 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2532 | { |
74e13ce4 | 2533 | MAGIC *mg; |
a0714e2c | 2534 | SV *value = NULL; |
71be2cbc | 2535 | |
7918f24d NC |
2536 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2537 | ||
14befaf4 | 2538 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
71be2cbc | 2539 | return; |
68dc0745 | 2540 | if (mg->mg_obj) { |
8772537c | 2541 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2542 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); |
6d822dc4 MS |
2543 | if (he) |
2544 | value = HeVAL(he); | |
3280af22 | 2545 | if (!value || value == &PL_sv_undef) |
be2597df | 2546 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); |
71be2cbc | 2547 | } |
bbfdc870 FC |
2548 | else if (LvSTARGOFF(sv) < 0) |
2549 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
68dc0745 | 2550 | else { |
502c6561 | 2551 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2552 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) |
a0714e2c | 2553 | LvTARG(sv) = NULL; /* array can't be extended */ |
68dc0745 | 2554 | else { |
bbfdc870 | 2555 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); |
031c6d82 | 2556 | if (!svp || !(value = *svp)) |
bbfdc870 | 2557 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 | 2558 | } |
2559 | } | |
b37c2d43 | 2560 | SvREFCNT_inc_simple_void(value); |
68dc0745 | 2561 | SvREFCNT_dec(LvTARG(sv)); |
2562 | LvTARG(sv) = value; | |
71be2cbc | 2563 | LvTARGLEN(sv) = 0; |
68dc0745 | 2564 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2565 | mg->mg_obj = NULL; |
68dc0745 | 2566 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc | 2567 | } |
2568 | ||
2569 | int | |
1f1dcfb5 FC |
2570 | Perl_magic_setnonelem(pTHX_ SV *sv, MAGIC *mg) |
2571 | { | |
2572 | PERL_ARGS_ASSERT_MAGIC_SETNONELEM; | |
2573 | PERL_UNUSED_ARG(mg); | |
2574 | sv_unmagic(sv, PERL_MAGIC_nonelem); | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | int | |
864dbfa3 | 2579 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2580 | { |
7918f24d | 2581 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2582 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2583 | return 0; | |
810b8aa5 GS |
2584 | } |
2585 | ||
2586 | int | |
864dbfa3 | 2587 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2588 | { |
7918f24d | 2589 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2590 | PERL_UNUSED_CONTEXT; |
0177730e | 2591 | PERL_UNUSED_ARG(sv); |
565764a8 | 2592 | mg->mg_len = -1; |
93a17b20 LW |
2593 | return 0; |
2594 | } | |
2595 | ||
02a48966 DM |
2596 | |
2597 | int | |
2598 | Perl_magic_freemglob(pTHX_ SV *sv, MAGIC *mg) | |
2599 | { | |
2600 | PERL_ARGS_ASSERT_MAGIC_FREEMGLOB; | |
2601 | PERL_UNUSED_ARG(sv); | |
2602 | ||
2603 | /* glob magic uses mg_len as a string length rather than a buffer | |
2604 | * length, so we need to free even with mg_len == 0: hence we can't | |
2605 | * rely on standard magic free handling */ | |
2606 | assert(mg->mg_type == PERL_MAGIC_regex_global && mg->mg_len >= -1); | |
2607 | Safefree(mg->mg_ptr); | |
2608 | mg->mg_ptr = NULL; | |
2609 | return 0; | |
2610 | } | |
2611 | ||
2612 | ||
93a17b20 | 2613 | int |
864dbfa3 | 2614 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2615 | { |
35a4481c | 2616 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2617 | |
7918f24d NC |
2618 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2619 | ||
79072805 | 2620 | if (uf && uf->uf_set) |
24f81a43 | 2621 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2622 | return 0; |
2623 | } | |
2624 | ||
c277df42 | 2625 | int |
faf82a0b AE |
2626 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2627 | { | |
488344d2 | 2628 | const char type = mg->mg_type; |
7918f24d NC |
2629 | |
2630 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2631 | ||
a5c7cb08 DM |
2632 | assert( type == PERL_MAGIC_fm |
2633 | || type == PERL_MAGIC_qr | |
2634 | || type == PERL_MAGIC_bm); | |
488344d2 | 2635 | return sv_unmagic(sv, type); |
faf82a0b AE |
2636 | } |
2637 | ||
7a4c00b4 | 2638 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2639 | int |
864dbfa3 | 2640 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2641 | { |
7918f24d NC |
2642 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2643 | ||
bbce6d69 | 2644 | /* |
838b5b74 | 2645 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 | 2646 | * and vanished with a faint plop. |
2647 | */ | |
96a5add6 | 2648 | PERL_UNUSED_CONTEXT; |
8772537c | 2649 | PERL_UNUSED_ARG(sv); |
7a4c00b4 | 2650 | if (mg->mg_ptr) { |
2651 | Safefree(mg->mg_ptr); | |
2652 | mg->mg_ptr = NULL; | |
565764a8 | 2653 | mg->mg_len = -1; |
7a4c00b4 | 2654 | } |
bbce6d69 | 2655 | return 0; |
2656 | } | |
a457b73c DM |
2657 | |
2658 | int | |
2659 | Perl_magic_freecollxfrm(pTHX_ SV *sv, MAGIC *mg) | |
2660 | { | |
2661 | PERL_ARGS_ASSERT_MAGIC_FREECOLLXFRM; | |
2662 | PERL_UNUSED_ARG(sv); | |
2663 | ||
2664 | /* Collate magic uses mg_len as a string length rather than a buffer | |
2665 | * length, so we need to free even with mg_len == 0: hence we can't | |
2666 | * rely on standard magic free handling */ | |
fb072d00 TC |
2667 | if (mg->mg_len >= 0) { |
2668 | assert(mg->mg_type == PERL_MAGIC_collxfrm); | |
2669 | Safefree(mg->mg_ptr); | |
2670 | mg->mg_ptr = NULL; | |
2671 | } | |
2672 | ||
a457b73c DM |
2673 | return 0; |
2674 | } | |
7a4c00b4 | 2675 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2676 | |
7e8c5dac HS |
2677 | /* Just clear the UTF-8 cache data. */ |
2678 | int | |
2679 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2680 | { | |
7918f24d | 2681 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2682 | PERL_UNUSED_CONTEXT; |
8772537c | 2683 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2684 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2685 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2686 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2687 | return 0; | |
2688 | } | |
2689 | ||
bbce6d69 | 2690 | int |
032a4919 DM |
2691 | Perl_magic_freeutf8(pTHX_ SV *sv, MAGIC *mg) |
2692 | { | |
2693 | PERL_ARGS_ASSERT_MAGIC_FREEUTF8; | |
2694 | PERL_UNUSED_ARG(sv); | |
2695 | ||
2696 | /* utf8 magic uses mg_len as a string length rather than a buffer | |
2697 | * length, so we need to free even with mg_len == 0: hence we can't | |
2698 | * rely on standard magic free handling */ | |
2699 | assert(mg->mg_type == PERL_MAGIC_utf8 && mg->mg_len >= -1); | |
2700 | Safefree(mg->mg_ptr); | |
2701 | mg->mg_ptr = NULL; | |
2702 | return 0; | |
2703 | } | |
2704 | ||
2705 | ||
2706 | int | |
9cce4f9a FC |
2707 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2708 | { | |
9782ce69 | 2709 | const char *bad = NULL; |
9cce4f9a | 2710 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2711 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2712 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2713 | case OPpLVREF_SV: | |
2714 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) | |
2715 | bad = " SCALAR"; | |
2716 | break; | |
2717 | case OPpLVREF_AV: | |
2718 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) | |
2719 | bad = "n ARRAY"; | |
2720 | break; | |
2721 | case OPpLVREF_HV: | |
2722 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) | |
2723 | bad = " HASH"; | |
2724 | break; | |
2725 | case OPpLVREF_CV: | |
2726 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) | |
2727 | bad = " CODE"; | |
2728 | } | |
2729 | if (bad) | |
26a50d99 | 2730 | /* diag_listed_as: Assigned value is not %s reference */ |
9782ce69 | 2731 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); |
c146a62a FC |
2732 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2733 | case 0: | |
2734 | { | |
2735 | SV * const old = PAD_SV(mg->mg_len); | |
2736 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2737 | SvREFCNT_dec(old); | |
2738 | break; | |
2739 | } | |
2740 | case SVt_PVGV: | |
2741 | gv_setref(mg->mg_obj, sv); | |
2742 | SvSETMAGIC(mg->mg_obj); | |
6102323a FC |
2743 | break; |
2744 | case SVt_PVAV: | |
2745 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), | |
2746 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
5f94141d FC |
2747 | break; |
2748 | case SVt_PVHV: | |
7fcb36d5 JH |
2749 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
2750 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); | |
c146a62a | 2751 | } |
d39c26a6 FC |
2752 | if (mg->mg_flags & MGf_PERSIST) |
2753 | NOOP; /* This sv is in use as an iterator var and will be reused, | |
2754 | so we must leave the magic. */ | |
2755 | else | |
2756 | /* This sv could be returned by the assignment op, so clear the | |
2757 | magic, as lvrefs are an implementation detail that must not be | |
2758 | leaked to the user. */ | |
2759 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2760 | return 0; |
2761 | } | |
2762 | ||
f1540bed JH |
2763 | static void |
2764 | S_set_dollarzero(pTHX_ SV *sv) | |
2765 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2766 | { | |
2767 | #ifdef USE_ITHREADS | |
f1540bed JH |
2768 | #endif |
2769 | const char *s; | |
2770 | STRLEN len; | |
f1540bed JH |
2771 | #ifdef HAS_SETPROCTITLE |
2772 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2773 | * show a string from the process struct and provide | |
2774 | * the setproctitle() routine to manipulate that. */ | |
2775 | if (PL_origalen != 1) { | |
2776 | s = SvPV_const(sv, len); | |
38626956 | 2777 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2778 | /* The leading "-" removes the "perl: " prefix, |
2779 | * but not the "(perl) suffix from the ps(1) | |
2780 | * output, because that's what ps(1) shows if the | |
2781 | * argv[] is modified. */ | |
2782 | setproctitle("-%s", s); | |
2783 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2784 | /* This doesn't really work if you assume that | |
2785 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2786 | * because in ps(1) output the result will be like | |
2787 | * sprintf("perl: %s (perl)", s) | |
2788 | * I guess this is a security feature: | |
2789 | * one (a user process) cannot get rid of the original name. | |
2790 | * --jhi */ | |
2791 | setproctitle("%s", s); | |
2792 | # endif | |
2793 | } | |
2794 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2795 | if (PL_origalen != 1) { | |
2796 | union pstun un; | |
2797 | s = SvPV_const(sv, len); | |
2798 | un.pst_command = (char *)s; | |
2799 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2800 | } | |
2801 | #else | |
2802 | if (PL_origalen > 1) { | |
4f3e04fd | 2803 | I32 i; |
f1540bed JH |
2804 | /* PL_origalen is set in perl_parse(). */ |
2805 | s = SvPV_force(sv,len); | |
2806 | if (len >= (STRLEN)PL_origalen-1) { | |
2807 | /* Longer than original, will be truncated. We assume that | |
2808 | * PL_origalen bytes are available. */ | |
2809 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2810 | } | |
2811 | else { | |
2812 | /* Shorter than original, will be padded. */ | |
2813 | #ifdef PERL_DARWIN | |
2814 | /* Special case for Mac OS X: see [perl #38868] */ | |
2815 | const int pad = 0; | |
2816 | #else | |
2817 | /* Is the space counterintuitive? Yes. | |
2818 | * (You were expecting \0?) | |
2819 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2820 | * --jhi */ | |
2821 | const int pad = ' '; | |
2822 | #endif | |
2823 | Copy(s, PL_origargv[0], len, char); | |
2824 | PL_origargv[0][len] = 0; | |
2825 | memset(PL_origargv[0] + len + 1, | |
2826 | pad, PL_origalen - len - 1); | |
2827 | } | |
2828 | PL_origargv[0][PL_origalen-1] = 0; | |
2829 | for (i = 1; i < PL_origargc; i++) | |
2830 | PL_origargv[i] = 0; | |
2831 | #ifdef HAS_PRCTL_SET_NAME | |
2832 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2833 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2834 | /* diag_listed_as: SKIPME */ | |
2835 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2836 | } | |
2837 | #endif | |
2838 | } | |
2839 | #endif | |
2840 | } | |
2841 | ||
9cce4f9a | 2842 | int |
864dbfa3 | 2843 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2844 | { |
20b7effb | 2845 | #ifdef USE_ITHREADS |
20b7effb | 2846 | #endif |
eb578fdb KW |
2847 | I32 paren; |
2848 | const REGEXP * rx; | |
79072805 | 2849 | I32 i; |
8990e307 | 2850 | STRLEN len; |
125b9982 | 2851 | MAGIC *tmg; |
2fdbfb4d | 2852 | |
7918f24d NC |
2853 | PERL_ARGS_ASSERT_MAGIC_SET; |
2854 | ||
e91d8259 | 2855 | if (!mg->mg_ptr) { |
960b831f | 2856 | paren = mg->mg_len; |
1e05feb3 | 2857 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2858 | setparen_got_rx: |
2fdbfb4d | 2859 | CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv); |
1e05feb3 | 2860 | } else { |
2fdbfb4d AB |
2861 | /* Croak with a READONLY error when a numbered match var is |
2862 | * set without a previous pattern match. Unless it's C<local $1> | |
2863 | */ | |
e91d8259 | 2864 | croakparen: |
2fdbfb4d | 2865 | if (!PL_localizing) { |
cb077ed2 | 2866 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2867 | } |
2868 | } | |
e91d8259 NC |
2869 | return 0; |
2870 | } | |
2871 | ||
2872 | switch (*mg->mg_ptr) { | |
748a9306 | 2873 | case '\001': /* ^A */ |
f2da823f FC |
2874 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2875 | else SvOK_off(PL_bodytarget); | |
64eff8b7 DM |
2876 | FmLINES(PL_bodytarget) = 0; |
2877 | if (SvPOK(PL_bodytarget)) { | |
2878 | char *s = SvPVX(PL_bodytarget); | |
0687887e KW |
2879 | char *e = SvEND(PL_bodytarget); |
2880 | while ( ((s = (char *) memchr(s, '\n', e - s))) ) { | |
64eff8b7 DM |
2881 | FmLINES(PL_bodytarget)++; |
2882 | s++; | |
2883 | } | |
2884 | } | |
125b9982 | 2885 | /* mg_set() has temporarily made sv non-magical */ |
284167a5 | 2886 | if (TAINTING_get) { |
125b9982 NT |
2887 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) |
2888 | SvTAINTED_on(PL_bodytarget); | |
2889 | else | |
2890 | SvTAINTED_off(PL_bodytarget); | |
2891 | } | |
748a9306 | 2892 | break; |
49460fe6 | 2893 | case '\003': /* ^C */ |
f2338a2e | 2894 | PL_minus_c = cBOOL(SvIV(sv)); |
49460fe6 NIS |
2895 | break; |
2896 | ||
79072805 | 2897 | case '\004': /* ^D */ |
b4ab917c | 2898 | #ifdef DEBUGGING |
a9e2d2bf DM |
2899 | { |
2900 | const char *s = SvPV_nolen_const(sv); | |
2901 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2902 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2903 | dump_all_perl(!DEBUG_B_TEST); | |
2904 | } | |
b4ab917c | 2905 | #else |
38ab35f8 | 2906 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2907 | #endif |
79072805 | 2908 | break; |
28f23441 | 2909 | case '\005': /* ^E */ |
d0063567 | 2910 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2911 | #ifdef VMS |
38ab35f8 | 2912 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2913 | #elif defined(WIN32) |
d0063567 | 2914 | SetLastError( SvIV(sv) ); |
2abc681d | 2915 | #elif defined(OS2) |
38ab35f8 | 2916 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2917 | #else |
d0063567 | 2918 | /* will anyone ever use this? */ |
38ab35f8 | 2919 | SETERRNO(SvIV(sv), 4); |
22fae026 | 2920 | #endif |
d0063567 | 2921 | } |
fd503f5c DIM |
2922 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) |
2923 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); | |
d0063567 | 2924 | break; |
79072805 | 2925 | case '\006': /* ^F */ |
9f601cf3 TC |
2926 | if (mg->mg_ptr[1] == '\0') { |
2927 | PL_maxsysfd = SvIV(sv); | |
2928 | } | |
79072805 | 2929 | break; |
a0d0e21e | 2930 | case '\010': /* ^H */ |
efa571ab KW |
2931 | { |
2932 | U32 save_hints = PL_hints; | |
5d382c25 | 2933 | PL_hints = SvUV(sv); |
efa571ab KW |
2934 | |
2935 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2936 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2937 | notify_parser_that_changed_to_utf8(); | |
2938 | } | |
2939 | } | |
a0d0e21e | 2940 | break; |
9d116dd7 | 2941 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
43c5f42d | 2942 | Safefree(PL_inplace); |
bd61b366 | 2943 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; |
da78da6e | 2944 | break; |
d9bad346 FC |
2945 | case '\016': /* ^N */ |
2946 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) | |
2947 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2948 | goto croakparen; | |
28f23441 | 2949 | case '\017': /* ^O */ |
ac27b0f5 | 2950 | if (*(mg->mg_ptr+1) == '\0') { |
43c5f42d | 2951 | Safefree(PL_osname); |
bd61b366 | 2952 | PL_osname = NULL; |
3511154c DM |
2953 | if (SvOK(sv)) { |
2954 | TAINT_PROPER("assigning to $^O"); | |
2e0de35c | 2955 | PL_osname = savesvpv(sv); |
3511154c | 2956 | } |
ac27b0f5 NIS |
2957 | } |
2958 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
8b850bd5 NC |
2959 | STRLEN len; |
2960 | const char *const start = SvPV(sv, len); | |
b54fc2b6 | 2961 | const char *out = (const char*)memchr(start, '\0', len); |
8b850bd5 | 2962 | SV *tmp; |
8b850bd5 NC |
2963 | |
2964 | ||
2965 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
f747ebd6 | 2966 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; |
8b850bd5 NC |
2967 | |
2968 | /* Opening for input is more common than opening for output, so | |
2969 | ensure that hints for input are sooner on linked list. */ | |
59cd0e26 | 2970 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, |
f747ebd6 Z |
2971 | SvUTF8(sv)) |
2972 | : newSVpvs_flags("", SvUTF8(sv)); | |
2973 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2974 | mg_set(tmp); | |
8b850bd5 | 2975 | |
f747ebd6 Z |
2976 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, |
2977 | SvUTF8(sv)); | |
2978 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2979 | mg_set(tmp); | |
ac27b0f5 | 2980 | } |
28f23441 | 2981 | break; |
79072805 | 2982 | case '\020': /* ^P */ |
2fdbfb4d AB |
2983 | PL_perldb = SvIV(sv); |
2984 | if (PL_perldb && !PL_DBsingle) | |
2985 | init_debugger(); | |
9b9e0be4 | 2986 | break; |
79072805 | 2987 | case '\024': /* ^T */ |
88e89b8a | 2988 | #ifdef BIG_TIME |
6b88bc9c | 2989 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 2990 | #else |
38ab35f8 | 2991 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 2992 | #endif |
79072805 | 2993 | break; |
e07ea26a NC |
2994 | case '\025': /* ^UTF8CACHE */ |
2995 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { | |
2996 | PL_utf8cache = (signed char) sv_2iv(sv); | |
2997 | } | |
2998 | break; | |
fde18df1 | 2999 | case '\027': /* ^W & $^WARNING_BITS */ |
4438c4b7 JH |
3000 | if (*(mg->mg_ptr+1) == '\0') { |
3001 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
38ab35f8 | 3002 | i = SvIV(sv); |
ac27b0f5 | 3003 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) |
0453d815 | 3004 | | (i ? G_WARN_ON : G_WARN_OFF) ; |
4438c4b7 | 3005 | } |
599cee73 | 3006 | } |
0a378802 | 3007 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { |
4438c4b7 | 3008 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { |
7e4f0450 | 3009 | if (!SvPOK(sv)) { |
1943af61 | 3010 | free_and_set_cop_warnings(&PL_compiling, pWARN_STD); |
d775746e GS |
3011 | break; |
3012 | } | |
f4fc7782 | 3013 | { |
b5477537 | 3014 | STRLEN len, i; |
006c1a1d Z |
3015 | int not_none = 0, not_all = 0; |
3016 | const U8 * const ptr = (const U8 *)SvPV_const(sv, len) ; | |
f4fc7782 | 3017 | for (i = 0 ; i < len ; ++i) { |
006c1a1d Z |
3018 | not_none |= ptr[i]; |
3019 | not_all |= ptr[i] ^ 0x55; | |
f4fc7782 | 3020 | } |
006c1a1d | 3021 | if (!not_none) { |
1943af61 | 3022 | free_and_set_cop_warnings(&PL_compiling, pWARN_NONE); |
006c1a1d | 3023 | } else if (len >= WARNsize && !not_all) { |
1943af61 | 3024 | free_and_set_cop_warnings(&PL_compiling, pWARN_ALL); |
94c8b9c1 N |
3025 | PL_dowarn |= G_WARN_ONCE ; |
3026 | } | |
3027 | else { | |
3028 | STRLEN len; | |
3029 | const char *const p = SvPV_const(sv, len); | |
3030 | ||
3031 | PL_compiling.cop_warnings | |
3032 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, | |
72dc9ed5 NC |
3033 | p, len); |
3034 | ||
94c8b9c1 | 3035 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
d3a7d8c7 | 3036 | PL_dowarn |= G_WARN_ONCE ; |
94c8b9c1 | 3037 | } |
f4fc7782 | 3038 | |
d3a7d8c7 | 3039 | } |
4438c4b7 | 3040 | } |
971a9dd3 | 3041 | } |
79072805 LW |
3042 | break; |
3043 | case '.': | |
3280af22 NIS |
3044 | if (PL_localizing) { |
3045 | if (PL_localizing == 1) | |
7766f137 | 3046 | SAVESPTR(PL_last_in_gv); |
748a9306 | 3047 | } |
3280af22 | 3048 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) |
632db599 | 3049 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); |
79072805 LW |
3050 | break; |
3051 | case '^': | |
acbe1b9d | 3052 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3053 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3054 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3055 | break; |
3056 | case '~': | |
acbe1b9d | 3057 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3058 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3059 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3060 | break; |
3061 | case '=': | |
acbe1b9d | 3062 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3063 | break; |
3064 | case '-': | |
acbe1b9d FC |
3065 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3066 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
099be4f1 | 3067 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; |
79072805 LW |
3068 | break; |
3069 | case '%': | |
acbe1b9d | 3070 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3071 | break; |
3072 | case '|': | |
4b65379b | 3073 | { |
099be4f1 | 3074 | IO * const io = GvIO(PL_defoutgv); |
720f287d AB |
3075 | if(!io) |
3076 | break; | |
38ab35f8 | 3077 | if ((SvIV(sv)) == 0) |
4b65379b CS |
3078 | IoFLAGS(io) &= ~IOf_FLUSH; |
3079 | else { | |
3080 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
3081 | PerlIO *ofp = IoOFP(io); | |
3082 | if (ofp) | |
3083 | (void)PerlIO_flush(ofp); | |
3084 | IoFLAGS(io) |= IOf_FLUSH; | |
3085 | } | |
3086 | } | |
79072805 LW |
3087 | } |
3088 | break; | |
79072805 | 3089 | case '/': |
1ab48e3a | 3090 | { |
1ab48e3a | 3091 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3092 | SV *referent = SvRV(sv); |
3093 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3094 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3095 | * the alternative is to copy pretty much the entire | |
3096 | * sv_reftype() into this routine, or to do a full string | |
3097 | * comparison on the return of sv_reftype() both of which | |
3098 | * make me feel worse! NOTE, do not modify this comment | |
3099 | * without reviewing the corresponding comment in | |
3100 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3101 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3102 | IV val = SvIV(referent); |
1ab48e3a | 3103 | if (val <= 0) { |
520b6fb6 DIM |
3104 | sv_setsv(sv, PL_rs); |
3105 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3106 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3107 | } |
3108 | } else { | |
ddce084a | 3109 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3110 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3111 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3112 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3113 | } |
3114 | } | |
b3a2acfa | 3115 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3116 | PL_rs = newSVsv(sv); |
b3a2acfa | 3117 | } |
79072805 LW |
3118 | break; |
3119 | case '\\': | |
ef8d46e8 | 3120 | SvREFCNT_dec(PL_ors_sv); |
6bc2995b | 3121 | if (SvOK(sv)) { |
7889fe52 | 3122 | PL_ors_sv = newSVsv(sv); |
009c130f | 3123 | } |
e3c19b7b | 3124 | else { |
a0714e2c | 3125 | PL_ors_sv = NULL; |
e3c19b7b | 3126 | } |
79072805 | 3127 | break; |
7d69d4a6 FC |
3128 | case '[': |
3129 | if (SvIV(sv) != 0) | |
3130 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3131 | break; | |
79072805 | 3132 | case '?': |
ff0cee69 | 3133 | #ifdef COMPLEX_STATUS |
6b88bc9c | 3134 | if (PL_localizing == 2) { |
41cb7b2b | 3135 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
3136 | PL_statusvalue = LvTARGOFF(sv); |
3137 | PL_statusvalue_vms = LvTARGLEN(sv); | |
ff0cee69 | 3138 | } |
3139 | else | |
3140 | #endif | |
3141 | #ifdef VMSISH_STATUS | |
3142 | if (VMSISH_STATUS) | |
fb38d079 | 3143 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); |
ff0cee69 | 3144 | else |
3145 | #endif | |
38ab35f8 | 3146 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
79072805 LW |
3147 | break; |
3148 | case '!': | |
93189314 JH |
3149 | { |
3150 | #ifdef VMS | |
3151 | # define PERL_VMS_BANG vaxc$errno | |
3152 | #else | |
3153 | # define PERL_VMS_BANG 0 | |
3154 | #endif | |
79c32fc2 | 3155 | #if defined(WIN32) |
c9beaf97 SH |
3156 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3157 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
3158 | #else | |
91487cfc | 3159 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
93189314 | 3160 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); |
c9beaf97 | 3161 | #endif |
93189314 | 3162 | } |
79072805 LW |
3163 | break; |
3164 | case '<': | |
985213f2 | 3165 | { |
b469f1e0 | 3166 | /* XXX $< currently silently ignores failures */ |
dfff4baf | 3167 | const Uid_t new_uid = SvUID(sv); |
985213f2 | 3168 | PL_delaymagic_uid = new_uid; |
3280af22 NIS |
3169 | if (PL_delaymagic) { |
3170 | PL_delaymagic |= DM_RUID; | |
79072805 LW |
3171 | break; /* don't do magic till later */ |
3172 | } | |
3173 | #ifdef HAS_SETRUID | |
b469f1e0 | 3174 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3175 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3176 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3177 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3178 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3179 | #else |
985213f2 | 3180 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3181 | # ifdef PERL_DARWIN |
75870ed3 | 3182 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
985213f2 | 3183 | if (new_uid != 0 && PerlProc_getuid() == 0) |
b469f1e0 | 3184 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3185 | # endif |
b469f1e0 | 3186 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
75870ed3 | 3187 | } else { |
cea2e8a9 | 3188 | Perl_croak(aTHX_ "setruid() not implemented"); |
a0d0e21e | 3189 | } |
79072805 | 3190 | #endif |
79072805 | 3191 | break; |
985213f2 | 3192 | } |
79072805 | 3193 | case '>': |
985213f2 | 3194 | { |
b469f1e0 | 3195 | /* XXX $> currently silently ignores failures */ |
dfff4baf | 3196 | const Uid_t new_euid = SvUID(sv); |
985213f2 | 3197 | PL_delaymagic_euid = new_euid; |
3280af22 NIS |
3198 | if (PL_delaymagic) { |
3199 | PL_delaymagic |= DM_EUID; | |
79072805 LW |
3200 | break; /* don't do magic till later */ |
3201 | } | |
3202 | #ifdef HAS_SETEUID | |
b469f1e0 | 3203 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3204 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3205 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3206 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3207 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3208 | #else |
985213f2 | 3209 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
b469f1e0 | 3210 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); |
a0d0e21e | 3211 | else { |
cea2e8a9 | 3212 | Perl_croak(aTHX_ "seteuid() not implemented"); |
a0d0e21e | 3213 | } |
79072805 | 3214 | #endif |
79072805 | 3215 | break; |
985213f2 | 3216 | } |
79072805 | 3217 | case '(': |
985213f2 | 3218 | { |
b469f1e0 | 3219 | /* XXX $( currently silently ignores failures */ |
dfff4baf | 3220 | const Gid_t new_gid = SvGID(sv); |
985213f2 | 3221 | PL_delaymagic_gid = new_gid; |
3280af22 NIS |
3222 | if (PL_delaymagic) { |
3223 | PL_delaymagic |= DM_RGID; | |
79072805 LW |
3224 | break; /* don't do magic till later */ |
3225 | } | |
3226 | #ifdef HAS_SETRGID | |
b469f1e0 | 3227 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3228 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3229 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3230 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3231 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3232 | #else |
985213f2 | 3233 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
b469f1e0 | 3234 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); |
748a9306 | 3235 | else { |
cea2e8a9 | 3236 | Perl_croak(aTHX_ "setrgid() not implemented"); |
748a9306 | 3237 | } |
79072805 | 3238 | #endif |
79072805 | 3239 | break; |
985213f2 | 3240 | } |
79072805 | 3241 | case ')': |
985213f2 | 3242 | { |
0635704a HS |
3243 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3244 | * but you can override it if you need to. | |
3245 | */ | |
3246 | #ifndef INVALID_GID | |
3247 | #define INVALID_GID ((Gid_t)-1) | |
3248 | #endif | |
b469f1e0 | 3249 | /* XXX $) currently silently ignores failures */ |
dfff4baf | 3250 | Gid_t new_egid; |
5cd24f17 | 3251 | #ifdef HAS_SETGROUPS |
3252 | { | |
b83604b4 | 3253 | const char *p = SvPV_const(sv, len); |
757f63d8 | 3254 | Groups_t *gary = NULL; |
79e302e6 MM |
3255 | const char* p_end = p + len; |
3256 | const char* endptr = p_end; | |
22ff3130 | 3257 | UV uv; |
fb4089e0 | 3258 | #ifdef _SC_NGROUPS_MAX |
3259 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3260 | ||
3261 | if (maxgrp < 0) | |
3262 | maxgrp = NGROUPS; | |
3263 | #else | |
3264 | int maxgrp = NGROUPS; | |
3265 | #endif | |
757f63d8 SP |
3266 | |
3267 | while (isSPACE(*p)) | |
3268 | ++p; | |
22ff3130 HS |
3269 | if (grok_atoUV(p, &uv, &endptr)) |
3270 | new_egid = (Gid_t)uv; | |
3271 | else { | |
0635704a | 3272 | new_egid = INVALID_GID; |
22ff3130 HS |
3273 | endptr = NULL; |
3274 | } | |
fb4089e0 | 3275 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3276 | if (endptr == NULL) |
3277 | break; | |
3278 | p = endptr; | |
79e302e6 | 3279 | endptr = p_end; |
757f63d8 SP |
3280 | while (isSPACE(*p)) |
3281 | ++p; | |
3282 | if (!*p) | |
3283 | break; | |
fdadaf77 | 3284 | if (!gary) |
757f63d8 SP |
3285 | Newx(gary, i + 1, Groups_t); |
3286 | else | |
3287 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3288 | if (grok_atoUV(p, &uv, &endptr)) |
3289 | gary[i] = (Groups_t)uv; | |
3290 | else { | |
0635704a | 3291 | gary[i] = INVALID_GID; |
22ff3130 HS |
3292 | endptr = NULL; |
3293 | } | |
757f63d8 SP |
3294 | } |
3295 | if (i) | |
b469f1e0 | 3296 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
f5a63d97 | 3297 | Safefree(gary); |
5cd24f17 | 3298 | } |
3299 | #else /* HAS_SETGROUPS */ | |
dfff4baf | 3300 | new_egid = SvGID(sv); |
5cd24f17 | 3301 | #endif /* HAS_SETGROUPS */ |
985213f2 | 3302 | PL_delaymagic_egid = new_egid; |
3280af22 NIS |
3303 | if (PL_delaymagic) { |
3304 | PL_delaymagic |= DM_EGID; | |
79072805 LW |
3305 | break; /* don't do magic till later */ |
3306 | } | |
3307 | #ifdef HAS_SETEGID | |
b469f1e0 | 3308 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3309 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3310 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3311 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3312 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3313 | #else |
985213f2 | 3314 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
b469f1e0 | 3315 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); |
748a9306 | 3316 | else { |
cea2e8a9 | 3317 | Perl_croak(aTHX_ "setegid() not implemented"); |
748a9306 | 3318 | } |
79072805 | 3319 | #endif |
79072805 | 3320 | break; |
985213f2 | 3321 | } |
79072805 | 3322 | case ':': |
2d8e6c8d | 3323 | PL_chopset = SvPV_force(sv,len); |
79072805 | 3324 | break; |
9cdac2a2 FC |
3325 | case '$': /* $$ */ |
3326 | /* Store the pid in mg->mg_obj so we can tell when a fork has | |
3327 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3328 | if (isGV(mg->mg_obj)) { | |
3329 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3330 | SvREFCNT_dec(mg->mg_obj); | |
3331 | mg->mg_flags |= MGf_REFCOUNTED; | |
3332 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3333 | } | |
3334 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3335 | break; | |
79072805 | 3336 | case '0': |
e2975953 | 3337 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3338 | S_set_dollarzero(aTHX_ sv); |
e2975953 | 3339 | UNLOCK_DOLLARZERO_MUTEX; |
79072805 LW |
3340 | break; |
3341 | } | |
3342 | return 0; | |
3343 | } | |
3344 | ||
ea81552b | 3345 | /* |
3f620621 | 3346 | =for apidoc_section $signals |
ea81552b KW |
3347 | =for apidoc whichsig |
3348 | =for apidoc_item whichsig_pv | |
3349 | =for apidoc_item whichsig_pvn | |
3350 | =for apidoc_item whichsig_sv | |
3351 | ||
3352 | These all convert a signal name into its corresponding signal number; | |
3353 | returning -1 if no corresponding number was found. | |
3354 | ||
3355 | They differ only in the source of the signal name: | |
3356 | ||
3357 | C<whichsig_pv> takes the name from the C<NUL>-terminated string starting at | |
3358 | C<sig>. | |
3359 | ||
3360 | C<whichsig> is merely a different spelling, a synonym, of C<whichsig_pv>. | |
3361 | ||
3362 | C<whichsig_pvn> takes the name from the string starting at C<sig>, with length | |
3363 | C<len> bytes. | |
3364 | ||
3365 | C<whichsig_sv> takes the name from the PV stored in the SV C<sigsv>. | |
3366 | ||
3367 | =cut | |
3368 | */ | |
3369 | ||
79072805 | 3370 | I32 |
84c7b88c BF |
3371 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3372 | { | |
3373 | const char *sigpv; | |
3374 | STRLEN siglen; | |
3375 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3376 | sigpv = SvPV_const(sigsv, siglen); |
3377 | return whichsig_pvn(sigpv, siglen); | |
3378 | } | |
3379 | ||
3380 | I32 | |
3381 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3382 | { | |
3383 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3384 | return whichsig_pvn(sig, strlen(sig)); |
3385 | } | |
3386 | ||
3387 | I32 | |
3388 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3389 | { |
eb578fdb | 3390 | char* const* sigv; |
7918f24d | 3391 | |
84c7b88c | 3392 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3393 | PERL_UNUSED_CONTEXT; |
79072805 | 3394 | |
aadb217d | 3395 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
84c7b88c | 3396 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
aadb217d | 3397 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; |
79072805 | 3398 | #ifdef SIGCLD |
84c7b88c | 3399 | if (memEQs(sig, len, "CHLD")) |
79072805 LW |
3400 | return SIGCLD; |
3401 | #endif | |
3402 | #ifdef SIGCHLD | |
84c7b88c | 3403 | if (memEQs(sig, len, "CLD")) |
79072805 LW |
3404 | return SIGCHLD; |
3405 | #endif | |
7f1236c0 | 3406 | return -1; |
79072805 LW |
3407 | } |
3408 | ||
dc37125b DM |
3409 | |
3410 | /* Perl_sighandler(), Perl_sighandler1(), Perl_sighandler3(): | |
3411 | * these three function are intended to be called by the OS as 'C' level | |
3412 | * signal handler functions in the case where unsafe signals are being | |
3413 | * used - i.e. they immediately invoke Perl_perly_sighandler() to call the | |
3414 | * perl-level sighandler, rather than deferring. | |
3415 | * In fact, the core itself will normally use Perl_csighandler as the | |
3416 | * OS-level handler; that function will then decide whether to queue the | |
3417 | * signal or call Perl_sighandler / Perl_perly_sighandler itself. So these | |
3418 | * functions are more useful for e.g. POSIX.xs when it wants explicit | |
3419 | * control of what's happening. | |
3420 | */ | |
3421 | ||
3422 | ||
5e7940ce | 3423 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b DM |
3424 | |
3425 | Signal_t | |
e7124897 | 3426 | Perl_sighandler(int sig, Siginfo_t *sip, void *uap) |
8a5e470b DM |
3427 | { |
3428 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3429 | } | |
3430 | ||
1e82f5a6 | 3431 | #else |
8a5e470b DM |
3432 | |
3433 | Signal_t | |
1e82f5a6 | 3434 | Perl_sighandler(int sig) |
8a5e470b DM |
3435 | { |
3436 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3437 | } | |
3438 | ||
1e82f5a6 | 3439 | #endif |
8a5e470b | 3440 | |
dc37125b DM |
3441 | Signal_t |
3442 | Perl_sighandler1(int sig) | |
3443 | { | |
3444 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3445 | } | |
3446 | ||
3447 | Signal_t | |
3448 | Perl_sighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
3449 | { | |
3450 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3451 | } | |
3452 | ||
3453 | ||
8a5e470b DM |
3454 | /* Invoke the perl-level signal handler. This function is called either |
3455 | * directly from one of the C-level signals handlers (Perl_sighandler or | |
3456 | * Perl_csighandler), or for safe signals, later from | |
3457 | * Perl_despatch_signals() at a suitable safe point during execution. | |
3458 | * | |
3459 | * 'safe' is a boolean indicating the latter call path. | |
3460 | */ | |
3461 | ||
3462 | Signal_t | |
3463 | Perl_perly_sighandler(int sig, Siginfo_t *sip PERL_UNUSED_DECL, | |
3464 | void *uap PERL_UNUSED_DECL, bool safe) | |
79072805 | 3465 | { |
1018e26f NIS |
3466 | #ifdef PERL_GET_SIG_CONTEXT |
3467 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3468 | #else |
cea2e8a9 | 3469 | dTHX; |
71d280e3 | 3470 | #endif |
79072805 | 3471 | dSP; |
a0714e2c SS |
3472 | GV *gv = NULL; |
3473 | SV *sv = NULL; | |
8772537c | 3474 | SV * const tSv = PL_Sv; |
601f1833 | 3475 | CV *cv = NULL; |
533c011a | 3476 | OP *myop = PL_op; |
84902520 | 3477 | U32 flags = 0; |
8772537c | 3478 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3479 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3480 | SV *errsv_save = NULL; |
71d280e3 | 3481 | |
84902520 | 3482 | |
727405f8 | 3483 | if (!PL_psig_ptr[sig]) { |
99ef548b | 3484 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
727405f8 NIS |
3485 | PL_sig_name[sig]); |
3486 | exit(sig); | |
3487 | } | |
ff0cee69 | 3488 | |
a0d63a7b DM |
3489 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3490 | /* Max number of items pushed there is 3*n or 4. We cannot fix | |
3491 | infinity, so we fix 4 (in fact 5): */ | |
3492 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3493 | flags |= 1; | |
3494 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3495 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3496 | } | |
84902520 | 3497 | } |
84902520 | 3498 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3499 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
8772537c AL |
3500 | || SvTYPE(cv) != SVt_PVCV) { |
3501 | HV *st; | |
f2c0649b | 3502 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); |
8772537c | 3503 | } |
84902520 | 3504 | |
a0d0e21e | 3505 | if (!cv || !CvROOT(cv)) { |
07c325bb | 3506 | const HEK * const hek = gv |
1d6bb9ae FC |
3507 | ? GvENAME_HEK(gv) |
3508 | : cv && CvNAMED(cv) | |
3509 | ? CvNAME_HEK(cv) | |
07c325bb FC |
3510 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; |
3511 | if (hek) | |
3512 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
147e3846 | 3513 | "SIG%s handler \"%" HEKf "\" not defined.\n", |
ac892e4a | 3514 | PL_sig_name[sig], HEKfARG(hek)); |
07c325bb FC |
3515 | /* diag_listed_as: SIG%s handler "%s" not defined */ |
3516 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3517 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3518 | PL_sig_name[sig]); | |
00d579c5 | 3519 | goto cleanup; |
79072805 LW |
3520 | } |
3521 | ||
0c4d3b5e DM |
3522 | sv = PL_psig_name[sig] |
3523 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) | |
3524 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3525 | flags |= 8; |
0c4d3b5e DM |
3526 | SAVEFREESV(sv); |
3527 | ||
a0d63a7b DM |
3528 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3529 | /* make sure our assumption about the size of the SAVEs are correct: | |
3530 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3531 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
3532 | } | |
e336de0d | 3533 | |
e788e7d3 | 3534 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3535 | PUSHMARK(SP); |
79072805 | 3536 | PUSHs(sv); |
dc43527e | 3537 | |
8aad04aa JH |
3538 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3539 | { | |
3540 | struct sigaction oact; | |
3541 | ||
fff75fa7 | 3542 | if (sip && sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { |
dc43527e DM |
3543 | HV *sih = newHV(); |
3544 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); | |
3545 | /* The siginfo fields signo, code, errno, pid, uid, | |
3546 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
3547 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); | |
3548 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
3549 | # ifdef HAS_SIGINFO_SI_ERRNO | |
3550 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3551 | # endif | |
3552 | # ifdef HAS_SIGINFO_SI_STATUS | |
3553 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3554 | # endif | |
3555 | # ifdef HAS_SIGINFO_SI_UID | |
3556 | { | |
3557 | SV *uid = newSV(0); | |
3558 | sv_setuid(uid, sip->si_uid); | |
3559 | (void)hv_stores(sih, "uid", uid); | |
3560 | } | |
3561 | # endif | |
3562 | # ifdef HAS_SIGINFO_SI_PID | |
3563 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3564 | # endif | |
3565 | # ifdef HAS_SIGINFO_SI_ADDR | |
3566 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3567 | # endif | |
3568 | # ifdef HAS_SIGINFO_SI_BAND | |
3569 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
3570 | # endif | |
3571 | EXTEND(SP, 2); | |
3572 | PUSHs(rv); | |
3573 | mPUSHp((char *)sip, sizeof(*sip)); | |
b4552a27 | 3574 | |
8aad04aa JH |
3575 | } |
3576 | } | |
3577 | #endif | |
dc43527e | 3578 | |
79072805 | 3579 | PUTBACK; |
a0d0e21e | 3580 | |
100c03aa JL |
3581 | errsv_save = newSVsv(ERRSV); |
3582 | ||
ad64d0ec | 3583 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3584 | |
d3acc0f7 | 3585 | POPSTACK; |
eed484f9 DD |
3586 | { |
3587 | SV * const errsv = ERRSV; | |
3588 | if (SvTRUE_NN(errsv)) { | |
3589 | SvREFCNT_dec(errsv_save); | |
dc43527e | 3590 | |
c22d665b | 3591 | #ifndef PERL_MICRO |
dc43527e DM |
3592 | /* Handler "died", for example to get out of a restart-able read(). |
3593 | * Before we re-do that on its behalf re-enable the signal which was | |
3594 | * blocked by the system when we entered. | |
3595 | */ | |
3596 | # ifdef HAS_SIGPROCMASK | |
8a5e470b DM |
3597 | if (!safe) { |
3598 | /* safe signals called via dispatch_signals() set up a | |
3599 | * savestack destructor, unblock_sigmask(), to | |
3600 | * automatically unblock the handler at the end. If | |
3601 | * instead we get here directly, we have to do it | |
3602 | * ourselves | |
3603 | */ | |
eed484f9 DD |
3604 | sigset_t set; |
3605 | sigemptyset(&set); | |
3606 | sigaddset(&set,sig); | |
3607 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3608 | } | |
dc43527e | 3609 | # else |
eed484f9 | 3610 | /* Not clear if this will work */ |
8a5e470b DM |
3611 | /* XXX not clear if this should be protected by 'if (safe)' |
3612 | * too */ | |
3613 | ||
eed484f9 DD |
3614 | (void)rsignal(sig, SIG_IGN); |
3615 | (void)rsignal(sig, PL_csighandlerp); | |
dc43527e | 3616 | # endif |
c22d665b | 3617 | #endif /* !PERL_MICRO */ |
dc43527e | 3618 | |
eed484f9 DD |
3619 | die_sv(errsv); |
3620 | } | |
3621 | else { | |
3622 | sv_setsv(errsv, errsv_save); | |
3623 | SvREFCNT_dec(errsv_save); | |
3624 | } | |
100c03aa JL |
3625 | } |
3626 | ||
7b52d656 | 3627 | cleanup: |
0c4d3b5e DM |
3628 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3629 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3630 | if (flags & 8) |
2357bae7 | 3631 | SvREFCNT_dec_NN(sv); |
533c011a | 3632 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3633 | |
3280af22 NIS |
3634 | PL_Sv = tSv; /* Restore global temporaries. */ |
3635 | PL_Xpv = tXpv; | |
53bb94e2 | 3636 | return; |
79072805 | 3637 | } |
4e35701f NIS |
3638 | |
3639 | ||
51371543 | 3640 | static void |
8772537c | 3641 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3642 | { |
8772537c AL |
3643 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3644 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3645 | bool bumped; |
51371543 GS |
3646 | |
3647 | if (!sv) | |
3648 | return; | |
3649 | ||
4bac9ae4 CS |
3650 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
3651 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ | |
a623f893 FC |
3652 | if (mgs->mgs_flags) |
3653 | SvFLAGS(sv) |= mgs->mgs_flags; | |
51371543 GS |
3654 | else |
3655 | mg_magical(sv); | |
51371543 GS |
3656 | } |
3657 | ||
150b625d | 3658 | bumped = mgs->mgs_bumped; |
51371543 GS |
3659 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3660 | ||
3661 | /* If we're still on top of the stack, pop us off. (That condition | |
3662 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3663 | * if it's being called via leave_scope.) | |
3664 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3665 | * may leave alloc gunk on the savestack, and some code | |
3666 | * (e.g. sighandler) doesn't expect that... | |
3667 | */ | |
3668 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3669 | { | |
1be36ce0 NC |
3670 | UV popval = SSPOPUV; |
3671 | assert(popval == SAVEt_DESTRUCTOR_X); | |
51371543 | 3672 | PL_savestack_ix -= 2; |
1be36ce0 NC |
3673 | popval = SSPOPUV; |
3674 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); | |
3675 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3676 | } |
150b625d DM |
3677 | if (bumped) { |
3678 | if (SvREFCNT(sv) == 1) { | |
3679 | /* We hold the last reference to this SV, which implies that the | |
3680 | SV was deleted as a side effect of the routines we called. | |
3681 | So artificially keep it alive a bit longer. | |
3682 | We avoid turning on the TEMP flag, which can cause the SV's | |
3683 | buffer to get stolen (and maybe other stuff). */ | |
150b625d | 3684 | sv_2mortal(sv); |
4bac9ae4 | 3685 | SvTEMP_off(sv); |
8985fe98 | 3686 | } |
150b625d | 3687 | else |
2357bae7 | 3688 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ |
8985fe98 | 3689 | } |
51371543 GS |
3690 | } |
3691 | ||
0c4d3b5e DM |
3692 | /* clean up the mess created by Perl_sighandler(). |
3693 | * Note that this is only called during an exit in a signal handler; | |
3694 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3695 | * skipped over. */ |
0c4d3b5e | 3696 | |
51371543 | 3697 | static void |
8772537c | 3698 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3699 | { |
0c4d3b5e | 3700 | PERL_UNUSED_ARG(p); |
7918f24d | 3701 | |
0c4d3b5e | 3702 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3703 | } |
1018e26f | 3704 | |
66610fdd | 3705 | /* |
3f620621 | 3706 | =for apidoc_section $magic |
b3ca2e83 NC |
3707 | =for apidoc magic_sethint |
3708 | ||
796b6530 | 3709 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3710 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3711 | anything that would need a deep copy. Maybe we should warn if we find a | |
3712 | reference. | |
b3ca2e83 NC |
3713 | |
3714 | =cut | |
3715 | */ | |
3716 | int | |
3717 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3718 | { | |
ad64d0ec | 3719 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
59cd0e26 | 3720 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3721 | |
7918f24d NC |
3722 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3723 | ||
e6e3e454 NC |
3724 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3725 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3726 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3727 | or take other more complex action. */ | |
3728 | ||
5b9c0671 NC |
3729 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3730 | Doing this here saves a lot of doing it manually in perl code (and | |
3731 | forgetting to do it, and consequent subtle errors. */ | |
3732 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 Z |
3733 | CopHINTHASH_set(&PL_compiling, |
3734 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); | |
b34c1a7e | 3735 | magic_sethint_feature(key, NULL, 0, sv, 0); |
b3ca2e83 NC |
3736 | return 0; |
3737 | } | |
3738 | ||
3739 | /* | |
f175cff5 | 3740 | =for apidoc magic_clearhint |
b3ca2e83 | 3741 | |
796b6530 | 3742 | Triggered by a delete from C<%^H>, records the key to |
c28fe1ec | 3743 | C<PL_compiling.cop_hints_hash>. |
b3ca2e83 NC |
3744 | |
3745 | =cut | |
3746 | */ | |
3747 | int | |
3748 | Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg) | |
3749 | { | |
7918f24d | 3750 | PERL_ARGS_ASSERT_MAGIC_CLEARHINT; |
f5a63d97 AL |
3751 | PERL_UNUSED_ARG(sv); |
3752 | ||
5b9c0671 | 3753 | PL_hints |= HINT_LOCALIZE_HH; |
20439bc7 | 3754 | CopHINTHASH_set(&PL_compiling, |
e3352591 FC |
3755 | mg->mg_len == HEf_SVKEY |
3756 | ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling), | |
3757 | MUTABLE_SV(mg->mg_ptr), 0, 0) | |
3758 | : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling), | |
3759 | mg->mg_ptr, mg->mg_len, 0, 0)); | |
b34c1a7e TC |
3760 | if (mg->mg_len == HEf_SVKEY) |
3761 | magic_sethint_feature(MUTABLE_SV(mg->mg_ptr), NULL, 0, NULL, FALSE); | |
3762 | else | |
3763 | magic_sethint_feature(NULL, mg->mg_ptr, mg->mg_len, NULL, FALSE); | |
b3ca2e83 NC |
3764 | return 0; |
3765 | } | |
3766 | ||
3767 | /* | |
f747ebd6 Z |
3768 | =for apidoc magic_clearhints |
3769 | ||
796b6530 | 3770 | Triggered by clearing C<%^H>, resets C<PL_compiling.cop_hints_hash>. |
f747ebd6 Z |
3771 | |
3772 | =cut | |
3773 | */ | |
3774 | int | |
3775 | Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg) | |
3776 | { | |
3777 | PERL_ARGS_ASSERT_MAGIC_CLEARHINTS; | |
3778 | PERL_UNUSED_ARG(sv); | |
3779 | PERL_UNUSED_ARG(mg); | |
20439bc7 Z |
3780 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
3781 | CopHINTHASH_set(&PL_compiling, cophh_new_empty()); | |
b34c1a7e | 3782 | CLEARFEATUREBITS(); |
f747ebd6 Z |
3783 | return 0; |
3784 | } | |
3785 | ||
09fb282d FC |
3786 | int |
3787 | Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv, | |
3788 | const char *name, I32 namlen) | |
3789 | { | |
3790 | MAGIC *nmg; | |
3791 | ||
3792 | PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER; | |
4f8dbb2d | 3793 | PERL_UNUSED_ARG(sv); |
09fb282d FC |
3794 | PERL_UNUSED_ARG(name); |
3795 | PERL_UNUSED_ARG(namlen); | |
3796 | ||
3797 | sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0); | |
3798 | nmg = mg_find(nsv, mg->mg_type); | |
316ebaf2 | 3799 | assert(nmg); |
09fb282d FC |
3800 | if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj); |
3801 | nmg->mg_ptr = mg->mg_ptr; | |
3802 | nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj); | |
3803 | nmg->mg_flags |= MGf_REFCOUNTED; | |
3804 | return 1; | |
3805 | } | |
3806 | ||
a6d69523 TC |
3807 | int |
3808 | Perl_magic_setdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3809 | PERL_ARGS_ASSERT_MAGIC_SETDEBUGVAR; | |
3810 | ||
23270f96 DM |
3811 | #if DBVARMG_SINGLE != 0 |
3812 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3813 | #endif | |
3814 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3815 | |
3816 | PL_DBcontrol[mg->mg_private] = SvIV_nomg(sv); | |
3817 | ||
3818 | return 1; | |
3819 | } | |
3820 | ||
3821 | int | |
3822 | Perl_magic_getdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3823 | PERL_ARGS_ASSERT_MAGIC_GETDEBUGVAR; | |
3824 | ||
23270f96 DM |
3825 | #if DBVARMG_SINGLE != 0 |
3826 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3827 | #endif | |
3828 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3829 | sv_setiv(sv, PL_DBcontrol[mg->mg_private]); |
3830 | ||
3831 | return 0; | |
3832 | } | |
3833 | ||
f747ebd6 | 3834 | /* |
14d04a33 | 3835 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3836 | */ |