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 | } |
8ca2a5d6 DD |
1131 | #ifdef WIN32 |
1132 | else if (strEQ(remaining, "IN32_SLOPPY_STAT")) { | |
1133 | sv_setiv(sv, w32_sloppystat); | |
1134 | } | |
1135 | #endif | |
79072805 | 1136 | break; |
79072805 | 1137 | case '+': |
aaa362c4 | 1138 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
2c7b5d76 DM |
1139 | paren = RX_LASTPAREN(rx); |
1140 | if (paren) | |
1141 | goto do_numbuf_fetch; | |
79072805 | 1142 | } |
e03e82a0 | 1143 | goto set_undef; |
a01268b5 JH |
1144 | case '\016': /* ^N */ |
1145 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { | |
2c7b5d76 DM |
1146 | paren = RX_LASTCLOSEPAREN(rx); |
1147 | if (paren) | |
1148 | goto do_numbuf_fetch; | |
a01268b5 | 1149 | } |
e03e82a0 | 1150 | goto set_undef; |
79072805 | 1151 | case '.': |
3280af22 | 1152 | if (GvIO(PL_last_in_gv)) { |
357c8808 | 1153 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); |
79072805 | 1154 | } |
79072805 LW |
1155 | break; |
1156 | case '?': | |
809a5acc | 1157 | { |
809a5acc | 1158 | sv_setiv(sv, (IV)STATUS_CURRENT); |
ff0cee69 | 1159 | #ifdef COMPLEX_STATUS |
41cb7b2b | 1160 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
1161 | LvTARGOFF(sv) = PL_statusvalue; |
1162 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1163 | #endif |
809a5acc | 1164 | } |
79072805 LW |
1165 | break; |
1166 | case '^': | |
acbe1b9d | 1167 | if (GvIOp(PL_defoutgv)) |
099be4f1 | 1168 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); |
79072805 LW |
1169 | if (s) |
1170 | sv_setpv(sv,s); | |
1171 | else { | |
3280af22 | 1172 | sv_setpv(sv,GvENAME(PL_defoutgv)); |
cb421d5e | 1173 | sv_catpvs(sv,"_TOP"); |
79072805 LW |
1174 | } |
1175 | break; | |
1176 | case '~': | |
acbe1b9d | 1177 | if (GvIOp(PL_defoutgv)) |
0daa599b | 1178 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); |
79072805 | 1179 | if (!s) |
3280af22 | 1180 | s = GvENAME(PL_defoutgv); |
79072805 LW |
1181 | sv_setpv(sv,s); |
1182 | break; | |
79072805 | 1183 | case '=': |
099be4f1 | 1184 | if (GvIO(PL_defoutgv)) |
0daa599b | 1185 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); |
79072805 LW |
1186 | break; |
1187 | case '-': | |
099be4f1 | 1188 | if (GvIO(PL_defoutgv)) |
0daa599b | 1189 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); |
79072805 LW |
1190 | break; |
1191 | case '%': | |
099be4f1 | 1192 | if (GvIO(PL_defoutgv)) |
0daa599b | 1193 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); |
79072805 | 1194 | break; |
79072805 | 1195 | case ':': |
79072805 LW |
1196 | case '/': |
1197 | break; | |
1198 | case '[': | |
e1dccc0d | 1199 | sv_setiv(sv, 0); |
79072805 LW |
1200 | break; |
1201 | case '|': | |
099be4f1 | 1202 | if (GvIO(PL_defoutgv)) |
0daa599b | 1203 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); |
79072805 | 1204 | break; |
79072805 | 1205 | case '\\': |
b2ce0fda | 1206 | if (PL_ors_sv) |
f28098ff | 1207 | sv_copypv(sv, PL_ors_sv); |
4bac9ae4 | 1208 | else |
e03e82a0 | 1209 | goto set_undef; |
79072805 | 1210 | break; |
0e219455 | 1211 | case '$': /* $$ */ |
9cdac2a2 FC |
1212 | { |
1213 | IV const pid = (IV)PerlProc_getpid(); | |
19db9fb7 | 1214 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { |
9cdac2a2 FC |
1215 | /* never set manually, or at least not since last fork */ |
1216 | sv_setiv(sv, pid); | |
19db9fb7 Z |
1217 | /* never unsafe, even if reading in a tainted expression */ |
1218 | SvTAINTED_off(sv); | |
1219 | } | |
9cdac2a2 FC |
1220 | /* else a value has been assigned manually, so do nothing */ |
1221 | } | |
0e219455 | 1222 | break; |
79072805 | 1223 | case '<': |
dfff4baf | 1224 | sv_setuid(sv, PerlProc_getuid()); |
79072805 LW |
1225 | break; |
1226 | case '>': | |
dfff4baf | 1227 | sv_setuid(sv, PerlProc_geteuid()); |
79072805 LW |
1228 | break; |
1229 | case '(': | |
dfff4baf | 1230 | sv_setgid(sv, PerlProc_getgid()); |
79072805 LW |
1231 | goto add_groups; |
1232 | case ')': | |
dfff4baf | 1233 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1234 | add_groups: |
79072805 | 1235 | #ifdef HAS_GETGROUPS |
79072805 | 1236 | { |
57d7c65e | 1237 | Groups_t *gary = NULL; |
375ed12a JH |
1238 | I32 num_groups = getgroups(0, gary); |
1239 | if (num_groups > 0) { | |
19742f39 | 1240 | I32 i; |
375ed12a JH |
1241 | Newx(gary, num_groups, Groups_t); |
1242 | num_groups = getgroups(num_groups, gary); | |
1243 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1244 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1245 | Safefree(gary); |
1246 | } | |
79072805 | 1247 | } |
155aba94 | 1248 | (void)SvIOK_on(sv); /* what a wonderful hack! */ |
cd70abae | 1249 | #endif |
79072805 | 1250 | break; |
79072805 LW |
1251 | case '0': |
1252 | break; | |
1253 | } | |
a0d0e21e | 1254 | return 0; |
e03e82a0 DM |
1255 | |
1256 | set_undef: | |
1257 | sv_set_undef(sv); | |
1258 | return 0; | |
79072805 LW |
1259 | } |
1260 | ||
1261 | int | |
864dbfa3 | 1262 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1263 | { |
8772537c | 1264 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1265 | |
7918f24d NC |
1266 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1267 | ||
79072805 | 1268 | if (uf && uf->uf_val) |
24f81a43 | 1269 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1270 | return 0; |
1271 | } | |
1272 | ||
1273 | int | |
864dbfa3 | 1274 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1275 | { |
9ae3433d | 1276 | STRLEN len = 0, klen; |
12033064 | 1277 | const char * const key = MgPV_const(mg,klen); |
888a67f6 | 1278 | const char *s = ""; |
1e422769 | 1279 | |
7918f24d NC |
1280 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1281 | ||
613c63b4 | 1282 | SvGETMAGIC(sv); |
12033064 | 1283 | if (SvOK(sv)) { |
613c63b4 CS |
1284 | /* defined environment variables are byte strings; unfortunately |
1285 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1286 | (void)SvPV_force_nomg_nolen(sv); | |
1287 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1288 | if (SvUTF8(sv)) { | |
1289 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1290 | SvUTF8_off(sv); | |
1291 | } | |
1292 | s = SvPVX(sv); | |
1293 | len = SvCUR(sv); | |
12033064 CS |
1294 | } |
1295 | my_setenv(key, s); /* does the deed */ | |
1296 | ||
a0d0e21e LW |
1297 | #ifdef DYNAMIC_ENV_FETCH |
1298 | /* We just undefd an environment var. Is a replacement */ | |
1299 | /* waiting in the wings? */ | |
1300 | if (!len) { | |
6bd66ee9 | 1301 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
fabdb6c0 | 1302 | if (valp) |
4ab59fcc | 1303 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; |
a0d0e21e LW |
1304 | } |
1305 | #endif | |
1e422769 | 1306 | |
28542d8f | 1307 | #if !defined(OS2) && !defined(WIN32) && !defined(MSDOS) |
79072805 LW |
1308 | /* And you'll never guess what the dog had */ |
1309 | /* in its mouth... */ | |
284167a5 | 1310 | if (TAINTING_get) { |
1e422769 | 1311 | MgTAINTEDDIR_off(mg); |
1312 | #ifdef VMS | |
b2aed775 | 1313 | if (s && memEQs(key, klen, "DCL$PATH")) { |
b8ffc8df | 1314 | char pathbuf[256], eltbuf[256], *cp, *elt; |
1e422769 | 1315 | int i = 0, j = 0; |
1316 | ||
6fca0082 | 1317 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); |
b8ffc8df | 1318 | elt = eltbuf; |
1e422769 | 1319 | do { /* DCL$PATH may be a search list */ |
1320 | while (1) { /* as may dev portion of any element */ | |
1321 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1322 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1323 | cando_by_name(S_IWUSR,0,elt) ) { | |
1324 | MgTAINTEDDIR_on(mg); | |
1325 | return 0; | |
1326 | } | |
1327 | } | |
bd61b366 | 1328 | if ((cp = strchr(elt, ':')) != NULL) |
1e422769 | 1329 | *cp = '\0'; |
1330 | if (my_trnlnm(elt, eltbuf, j++)) | |
1331 | elt = eltbuf; | |
1332 | else | |
1333 | break; | |
1334 | } | |
1335 | j = 0; | |
1336 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1337 | } | |
1338 | #endif /* VMS */ | |
b2aed775 | 1339 | if (s && memEQs(key, klen, "PATH")) { |
8772537c | 1340 | const char * const strend = s + len; |
463ee0b2 | 1341 | |
70b484a8 DM |
1342 | /* set MGf_TAINTEDDIR if any component of the new path is |
1343 | * relative or world-writeable */ | |
463ee0b2 | 1344 | while (s < strend) { |
96827780 | 1345 | char tmpbuf[256]; |
c623ac67 | 1346 | Stat_t st; |
5f74f29c | 1347 | I32 i; |
83269ced CB |
1348 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1349 | const char path_sep = PL_perllib_sep; | |
f5a63d97 AL |
1350 | #else |
1351 | const char path_sep = ':'; | |
1352 | #endif | |
ba0a4150 | 1353 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
427eaa01 | 1354 | s, strend, path_sep, &i); |
463ee0b2 | 1355 | s++; |
bb7a0f54 | 1356 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ |
83269ced CB |
1357 | #ifdef __VMS |
1358 | /* no colon thus no device name -- assume relative path */ | |
1359 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1360 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1361 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 CB |
1362 | #else |
1363 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ | |
1364 | #endif | |
c6ed36e1 | 1365 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
8990e307 | 1366 | MgTAINTEDDIR_on(mg); |
1e422769 | 1367 | return 0; |
1368 | } | |
463ee0b2 | 1369 | } |
79072805 LW |
1370 | } |
1371 | } | |
28542d8f | 1372 | #endif /* neither OS2 nor WIN32 nor MSDOS */ |
1e422769 | 1373 | |
79072805 LW |
1374 | return 0; |
1375 | } | |
1376 | ||
1377 | int | |
864dbfa3 | 1378 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1379 | { |
7918f24d | 1380 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1381 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1382 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1383 | return 0; |
1384 | } | |
1385 | ||
88e89b8a | 1386 | int |
864dbfa3 | 1387 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1388 | { |
7918f24d | 1389 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1390 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1391 | #if defined(VMS) |
cea2e8a9 | 1392 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1393 | #else |
3280af22 | 1394 | if (PL_localizing) { |
fb73857a | 1395 | HE* entry; |
b0269e46 | 1396 | my_clearenv(); |
85fbaab2 NC |
1397 | hv_iterinit(MUTABLE_HV(sv)); |
1398 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
fb73857a | 1399 | I32 keylen; |
1400 | my_setenv(hv_iterkey(entry, &keylen), | |
85fbaab2 | 1401 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); |
fb73857a | 1402 | } |
1403 | } | |
1404 | #endif | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | int | |
864dbfa3 | 1409 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1410 | { |
7918f24d | 1411 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1412 | PERL_UNUSED_ARG(sv); |
1413 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1414 | #if defined(VMS) |
1415 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1416 | #else | |
1417 | my_clearenv(); | |
1418 | #endif | |
3e3baf6d | 1419 | return 0; |
66b1d557 HM |
1420 | } |
1421 | ||
64ca3a65 | 1422 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1423 | #ifdef HAS_SIGPROCMASK |
1424 | static void | |
1425 | restore_sigmask(pTHX_ SV *save_sv) | |
1426 | { | |
0bd48802 | 1427 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1428 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1429 | } |
1430 | #endif | |
66b1d557 | 1431 | int |
864dbfa3 | 1432 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1433 | { |
88e89b8a | 1434 | /* Are we fetching a signal entry? */ |
708854f2 | 1435 | int i = (I16)mg->mg_private; |
7918f24d NC |
1436 | |
1437 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1438 | ||
708854f2 | 1439 | if (!i) { |
84c7b88c BF |
1440 | STRLEN siglen; |
1441 | const char * sig = MgPV_const(mg, siglen); | |
1442 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1443 | } |
1444 | ||
e02bfb16 | 1445 | if (i > 0) { |
22c35a8c GS |
1446 | if(PL_psig_ptr[i]) |
1447 | sv_setsv(sv,PL_psig_ptr[i]); | |
88e89b8a | 1448 | else { |
46da273f | 1449 | Sighandler_t sigstate = rsignal_state(i); |
23ada85b | 1450 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
46da273f AL |
1451 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1452 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1453 | #endif |
1454 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
46da273f AL |
1455 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1456 | sigstate = SIG_DFL; | |
85b332e2 | 1457 | #endif |
88e89b8a | 1458 | /* cache state so we don't fetch it again */ |
8aad04aa | 1459 | if(sigstate == (Sighandler_t) SIG_IGN) |
6502358f | 1460 | sv_setpvs(sv,"IGNORE"); |
88e89b8a | 1461 | else |
e03e82a0 | 1462 | sv_set_undef(sv); |
46da273f | 1463 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
88e89b8a | 1464 | SvTEMP_off(sv); |
1465 | } | |
1466 | } | |
1467 | return 0; | |
1468 | } | |
1469 | int | |
864dbfa3 | 1470 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1471 | { |
7918f24d | 1472 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1473 | |
38a124f0 | 1474 | magic_setsig(NULL, mg); |
179c85a2 | 1475 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1476 | } |
3d37d572 | 1477 | |
dc37125b | 1478 | |
5e7940ce | 1479 | #ifdef PERL_USE_3ARG_SIGHANDLER |
dc37125b DM |
1480 | Signal_t |
1481 | Perl_csighandler(int sig, Siginfo_t *sip, void *uap) | |
1482 | { | |
1483 | Perl_csighandler3(sig, sip, uap); | |
1484 | } | |
8aad04aa | 1485 | #else |
dc37125b | 1486 | Signal_t |
0a8e0eff | 1487 | Perl_csighandler(int sig) |
dc37125b DM |
1488 | { |
1489 | Perl_csighandler3(sig, NULL, NULL); | |
1490 | } | |
8aad04aa | 1491 | #endif |
dc37125b DM |
1492 | |
1493 | Signal_t | |
1494 | Perl_csighandler1(int sig) | |
1495 | { | |
1496 | Perl_csighandler3(sig, NULL, NULL); | |
1497 | } | |
1498 | ||
1499 | /* Handler intended to directly handle signal calls from the kernel. | |
1500 | * (Depending on configuration, the kernel may actually call one of the | |
1501 | * wrappers csighandler() or csighandler1() instead.) | |
1502 | * It either queues up the signal or dispatches it immediately depending | |
1503 | * on whether safe signals are enabled and whether the signal is capable | |
1504 | * of being deferred (e.g. SEGV isn't). | |
1505 | */ | |
1506 | ||
1507 | Signal_t | |
1508 | Perl_csighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
0a8e0eff | 1509 | { |
1018e26f NIS |
1510 | #ifdef PERL_GET_SIG_CONTEXT |
1511 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1512 | #else | |
85b332e2 CL |
1513 | dTHX; |
1514 | #endif | |
5e7940ce DM |
1515 | |
1516 | #ifdef PERL_USE_3ARG_SIGHANDLER | |
ffb6256b JH |
1517 | #if defined(__cplusplus) && defined(__GNUC__) |
1518 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1519 | * parameters would be warned about. */ | |
1520 | PERL_UNUSED_ARG(sip); | |
1521 | PERL_UNUSED_ARG(uap); | |
1522 | #endif | |
1271a1be | 1523 | #endif |
5e7940ce | 1524 | |
23ada85b | 1525 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1526 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1527 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1528 | #endif |
2e34cc90 | 1529 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1530 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1531 | #ifdef KILL_BY_SIGPRC |
1532 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1533 | #else | |
1534 | exit(1); | |
1535 | #endif | |
1536 | #endif | |
406878dd | 1537 | if ( |
853d2c32 RGS |
1538 | #ifdef SIGILL |
1539 | sig == SIGILL || | |
1540 | #endif | |
1541 | #ifdef SIGBUS | |
1542 | sig == SIGBUS || | |
1543 | #endif | |
1544 | #ifdef SIGSEGV | |
1545 | sig == SIGSEGV || | |
1546 | #endif | |
1547 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) | |
4ffa73a3 | 1548 | /* Call the perl level handler now-- |
31c91b43 | 1549 | * with risk we may be in malloc() or being destructed etc. */ |
8a5e470b DM |
1550 | { |
1551 | if (PL_sighandlerp == Perl_sighandler) | |
1552 | /* default handler, so can call perly_sighandler() directly | |
1553 | * rather than via Perl_sighandler, passing the extra | |
1554 | * 'safe = false' arg | |
1555 | */ | |
ddb513d5 | 1556 | Perl_perly_sighandler(sig, NULL, NULL, 0 /* unsafe */); |
8a5e470b | 1557 | else |
5e7940ce | 1558 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1559 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1560 | #else |
8a5e470b | 1561 | (*PL_sighandlerp)(sig); |
92807b6d | 1562 | #endif |
8a5e470b | 1563 | } |
406878dd | 1564 | else { |
31c91b43 | 1565 | if (!PL_psig_pend) return; |
406878dd GA |
1566 | /* Set a flag to say this signal is pending, that is awaiting delivery after |
1567 | * the current Perl opcode completes */ | |
1568 | PL_psig_pend[sig]++; | |
1569 | ||
1570 | #ifndef SIG_PENDING_DIE_COUNT | |
1571 | # define SIG_PENDING_DIE_COUNT 120 | |
1572 | #endif | |
fe13d51d | 1573 | /* Add one to say _a_ signal is pending */ |
406878dd GA |
1574 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) |
1575 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1576 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
1577 | } | |
0a8e0eff NIS |
1578 | } |
1579 | ||
2e34cc90 CL |
1580 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1581 | void | |
1582 | Perl_csighandler_init(void) | |
1583 | { | |
1584 | int sig; | |
27da23d5 | 1585 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1586 | |
1587 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1588 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1589 | dTHX; |
27da23d5 | 1590 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1591 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1592 | #endif |
1593 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1594 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1595 | #endif |
1596 | } | |
27da23d5 | 1597 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1598 | } |
1599 | #endif | |
1600 | ||
7fe50b8b LT |
1601 | #if defined HAS_SIGPROCMASK |
1602 | static void | |
1603 | unblock_sigmask(pTHX_ void* newset) | |
1604 | { | |
dc3bf405 | 1605 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1606 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1607 | } | |
1608 | #endif | |
1609 | ||
0a8e0eff NIS |
1610 | void |
1611 | Perl_despatch_signals(pTHX) | |
1612 | { | |
1613 | int sig; | |
1614 | PL_sig_pending = 0; | |
1615 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1616 | if (PL_psig_pend[sig]) { | |
d0166017 | 1617 | dSAVE_ERRNO; |
7fe50b8b | 1618 | #ifdef HAS_SIGPROCMASK |
55534442 LT |
1619 | /* From sigaction(2) (FreeBSD man page): |
1620 | * | Signal routines normally execute with the signal that | |
1621 | * | caused their invocation blocked, but other signals may | |
1622 | * | yet occur. | |
1623 | * Emulation of this behavior (from within Perl) is enabled | |
1624 | * using sigprocmask | |
1625 | */ | |
1626 | int was_blocked; | |
1627 | sigset_t newset, oldset; | |
1628 | ||
1629 | sigemptyset(&newset); | |
1630 | sigaddset(&newset, sig); | |
1631 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1632 | was_blocked = sigismember(&oldset, sig); | |
7fe50b8b LT |
1633 | if (!was_blocked) { |
1634 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1635 | ENTER; | |
1636 | SAVEFREESV(save_sv); | |
1637 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1638 | } | |
55534442 | 1639 | #endif |
25da4428 | 1640 | PL_psig_pend[sig] = 0; |
8a5e470b DM |
1641 | if (PL_sighandlerp == Perl_sighandler) |
1642 | /* default handler, so can call perly_sighandler() directly | |
1643 | * rather than via Perl_sighandler, passing the extra | |
1644 | * 'safe = true' arg | |
1645 | */ | |
1646 | Perl_perly_sighandler(sig, NULL, NULL, 1 /* safe */); | |
1647 | else | |
5e7940ce | 1648 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1649 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1650 | #else |
8a5e470b | 1651 | (*PL_sighandlerp)(sig); |
92807b6d | 1652 | #endif |
8a5e470b | 1653 | |
7fe50b8b | 1654 | #ifdef HAS_SIGPROCMASK |
55534442 | 1655 | if (!was_blocked) |
7fe50b8b | 1656 | LEAVE; |
55534442 | 1657 | #endif |
d0166017 | 1658 | RESTORE_ERRNO; |
0a8e0eff NIS |
1659 | } |
1660 | } | |
1661 | } | |
1662 | ||
38a124f0 | 1663 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1664 | int |
864dbfa3 | 1665 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1666 | { |
79072805 | 1667 | I32 i; |
cbbf8932 | 1668 | SV** svp = NULL; |
2d4fcd5e AJ |
1669 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1670 | * effects (due to closures). We must make sure that the new disposition | |
1671 | * is in place before it is called. | |
1672 | */ | |
cbbf8932 | 1673 | SV* to_dec = NULL; |
e72dc28c | 1674 | STRLEN len; |
2d4fcd5e AJ |
1675 | #ifdef HAS_SIGPROCMASK |
1676 | sigset_t set, save; | |
1677 | SV* save_sv; | |
1678 | #endif | |
eb578fdb | 1679 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1680 | |
1681 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1682 | ||
748a9306 | 1683 | if (*s == '_') { |
84c7b88c | 1684 | if (memEQs(s, len, "__DIE__")) |
3280af22 | 1685 | svp = &PL_diehook; |
84c7b88c | 1686 | else if (memEQs(s, len, "__WARN__") |
38a124f0 NC |
1687 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { |
1688 | /* Merge the existing behaviours, which are as follows: | |
1689 | magic_setsig, we always set svp to &PL_warnhook | |
1690 | (hence we always change the warnings handler) | |
1691 | For magic_clearsig, we don't change the warnings handler if it's | |
1692 | set to the &PL_warnhook. */ | |
3280af22 | 1693 | svp = &PL_warnhook; |
84c7b88c BF |
1694 | } else if (sv) { |
1695 | SV *tmp = sv_newmortal(); | |
1696 | Perl_croak(aTHX_ "No such hook: %s", | |
1697 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1698 | } | |
748a9306 | 1699 | i = 0; |
38a124f0 | 1700 | if (svp && *svp) { |
9289f461 RGS |
1701 | if (*svp != PERL_WARNHOOK_FATAL) |
1702 | to_dec = *svp; | |
cbbf8932 | 1703 | *svp = NULL; |
4633a7c4 | 1704 | } |
748a9306 LW |
1705 | } |
1706 | else { | |
708854f2 NC |
1707 | i = (I16)mg->mg_private; |
1708 | if (!i) { | |
84c7b88c | 1709 | i = whichsig_pvn(s, len); /* ...no, a brick */ |
58a26b12 | 1710 | mg->mg_private = (U16)i; |
708854f2 | 1711 | } |
86d86cad | 1712 | if (i <= 0) { |
84c7b88c BF |
1713 | if (sv) { |
1714 | SV *tmp = sv_newmortal(); | |
1715 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", | |
1716 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1717 | } | |
748a9306 LW |
1718 | return 0; |
1719 | } | |
2d4fcd5e AJ |
1720 | #ifdef HAS_SIGPROCMASK |
1721 | /* Avoid having the signal arrive at a bad time, if possible. */ | |
1722 | sigemptyset(&set); | |
1723 | sigaddset(&set,i); | |
1724 | sigprocmask(SIG_BLOCK, &set, &save); | |
1725 | ENTER; | |
9ff8e806 | 1726 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); |
2d4fcd5e AJ |
1727 | SAVEFREESV(save_sv); |
1728 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1729 | #endif | |
1730 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1731 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
27da23d5 | 1732 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1733 | #endif |
23ada85b | 1734 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
27da23d5 | 1735 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1736 | #endif |
2e34cc90 | 1737 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1738 | PL_sig_defaulting[i] = 0; |
2e34cc90 | 1739 | #endif |
2d4fcd5e | 1740 | to_dec = PL_psig_ptr[i]; |
38a124f0 NC |
1741 | if (sv) { |
1742 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1743 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
79fd3822 NC |
1744 | |
1745 | /* Signals don't change name during the program's execution, so once | |
1746 | they're cached in the appropriate slot of PL_psig_name, they can | |
1747 | stay there. | |
1748 | ||
1749 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1750 | at least, doing most of the work. */ | |
1751 | if (!PL_psig_name[i]) { | |
92d4124b TR |
1752 | const char* name = PL_sig_name[i]; |
1753 | PL_psig_name[i] = newSVpvn(name, strlen(name)); | |
79fd3822 NC |
1754 | SvREADONLY_on(PL_psig_name[i]); |
1755 | } | |
38a124f0 | 1756 | } else { |
79fd3822 | 1757 | SvREFCNT_dec(PL_psig_name[i]); |
38a124f0 NC |
1758 | PL_psig_name[i] = NULL; |
1759 | PL_psig_ptr[i] = NULL; | |
1760 | } | |
748a9306 | 1761 | } |
38a124f0 | 1762 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
2d4fcd5e | 1763 | if (i) { |
5c1546dc | 1764 | (void)rsignal(i, PL_csighandlerp); |
2d4fcd5e | 1765 | } |
748a9306 | 1766 | else |
b37c2d43 | 1767 | *svp = SvREFCNT_inc_simple_NN(sv); |
38a124f0 | 1768 | } else { |
9dfa190b NC |
1769 | if (sv && SvOK(sv)) { |
1770 | s = SvPV_force(sv, len); | |
1771 | } else { | |
1772 | sv = NULL; | |
1773 | } | |
84c7b88c | 1774 | if (sv && memEQs(s, len,"IGNORE")) { |
9dfa190b | 1775 | if (i) { |
23ada85b | 1776 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
9dfa190b NC |
1777 | PL_sig_ignoring[i] = 1; |
1778 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1779 | #else |
9dfa190b | 1780 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1781 | #endif |
9dfa190b | 1782 | } |
2d4fcd5e | 1783 | } |
84c7b88c | 1784 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { |
9dfa190b | 1785 | if (i) { |
2e34cc90 | 1786 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
9dfa190b NC |
1787 | PL_sig_defaulting[i] = 1; |
1788 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1789 | #else |
9dfa190b | 1790 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
2e34cc90 | 1791 | #endif |
9dfa190b NC |
1792 | } |
1793 | } | |
1794 | else { | |
1795 | /* | |
1796 | * We should warn if HINT_STRICT_REFS, but without | |
1797 | * access to a known hint bit in a known OP, we can't | |
1798 | * tell whether HINT_STRICT_REFS is in force or not. | |
1799 | */ | |
0687887e | 1800 | if (!memchr(s, ':', len) && !memchr(s, '\'', len)) |
9dfa190b NC |
1801 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), |
1802 | SV_GMAGIC); | |
1803 | if (i) | |
1804 | (void)rsignal(i, PL_csighandlerp); | |
1805 | else | |
1806 | *svp = SvREFCNT_inc_simple_NN(sv); | |
136e0459 | 1807 | } |
748a9306 | 1808 | } |
9dfa190b | 1809 | |
2d4fcd5e AJ |
1810 | #ifdef HAS_SIGPROCMASK |
1811 | if(i) | |
1812 | LEAVE; | |
1813 | #endif | |
ef8d46e8 | 1814 | SvREFCNT_dec(to_dec); |
79072805 LW |
1815 | return 0; |
1816 | } | |
64ca3a65 | 1817 | #endif /* !PERL_MICRO */ |
79072805 LW |
1818 | |
1819 | int | |
864dbfa3 | 1820 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1821 | { |
7918f24d | 1822 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1823 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1824 | |
89c14e2e | 1825 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1826 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
89c14e2e BB |
1827 | return 0; |
1828 | ||
0e446081 | 1829 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1830 | } |
1831 | ||
0e446081 | 1832 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1833 | int |
52b45067 RD |
1834 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1835 | { | |
52b45067 | 1836 | HV* stash; |
7918f24d NC |
1837 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1838 | ||
52b45067 | 1839 | /* Bail out if destruction is going on */ |
627364f1 | 1840 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1841 | |
0e446081 NC |
1842 | if (sv) |
1843 | av_clear(MUTABLE_AV(sv)); | |
52b45067 | 1844 | |
6624142a FC |
1845 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1846 | /* This occurs with setisa_elem magic, which calls this | |
1847 | same function. */ | |
1848 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
1849 | ||
316ebaf2 | 1850 | assert(mg); |
6624142a FC |
1851 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1852 | SV **svp = AvARRAY((AV *)mg->mg_obj); | |
1853 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1854 | while (items--) { | |
1855 | stash = GvSTASH((GV *)*svp++); | |
1856 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1857 | } | |
1858 | ||
1859 | return 0; | |
1860 | } | |
1861 | ||
52b45067 | 1862 | stash = GvSTASH( |
6624142a | 1863 | (const GV *)mg->mg_obj |
52b45067 RD |
1864 | ); |
1865 | ||
00169e2c FC |
1866 | /* The stash may have been detached from the symbol table, so check its |
1867 | name before doing anything. */ | |
1868 | if (stash && HvENAME_get(stash)) | |
5562fa71 | 1869 | mro_isa_changed_in(stash); |
52b45067 RD |
1870 | |
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | int | |
864dbfa3 | 1875 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1876 | { |
85fbaab2 | 1877 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1878 | I32 i = 0; |
7918f24d NC |
1879 | |
1880 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1881 | PERL_UNUSED_ARG(mg); |
7719e241 | 1882 | |
6ff81951 | 1883 | if (hv) { |
497b47a8 | 1884 | (void) hv_iterinit(hv); |
ad64d0ec | 1885 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1b95d04f | 1886 | i = HvUSEDKEYS(hv); |
497b47a8 JH |
1887 | else { |
1888 | while (hv_iternext(hv)) | |
1889 | i++; | |
1890 | } | |
6ff81951 GS |
1891 | } |
1892 | ||
1893 | sv_setiv(sv, (IV)i); | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | int | |
864dbfa3 | 1898 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1899 | { |
7918f24d | 1900 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1901 | PERL_UNUSED_ARG(mg); |
946ec16e | 1902 | if (LvTARG(sv)) { |
85fbaab2 | 1903 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e | 1904 | } |
1905 | return 0; | |
ac27b0f5 | 1906 | } |
946ec16e | 1907 | |
efaf3674 | 1908 | /* |
3f620621 | 1909 | =for apidoc_section $magic |
efaf3674 DM |
1910 | =for apidoc magic_methcall |
1911 | ||
1912 | Invoke a magic method (like FETCH). | |
1913 | ||
2baee27b FC |
1914 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1915 | ||
1916 | C<meth> is the name of the method to call. | |
1917 | ||
1918 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1919 | ||
1920 | The C<flags> can be: | |
1921 | ||
1922 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1923 | return a value | |
1924 | G_UNDEF_FILL fill the stack with argc pointers to | |
1925 | PL_sv_undef | |
1926 | ||
1927 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1928 | |
796b6530 | 1929 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1930 | |
1931 | ||
1932 | =cut | |
1933 | */ | |
1934 | ||
1935 | SV* | |
36925d9e | 1936 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
046b0c7d | 1937 | U32 argc, ...) |
a0d0e21e LW |
1938 | { |
1939 | dSP; | |
efaf3674 | 1940 | SV* ret = NULL; |
463ee0b2 | 1941 | |
7918f24d NC |
1942 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1943 | ||
efaf3674 | 1944 | ENTER; |
d1d7a15d NC |
1945 | |
1946 | if (flags & G_WRITING_TO_STDERR) { | |
1947 | SAVETMPS; | |
1948 | ||
2782061f | 1949 | save_re_context(); |
d1d7a15d NC |
1950 | SAVESPTR(PL_stderrgv); |
1951 | PL_stderrgv = NULL; | |
1952 | } | |
1953 | ||
efaf3674 | 1954 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1955 | PUSHMARK(SP); |
efaf3674 | 1956 | |
052a7c76 DM |
1957 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1958 | assert(argc <= I32_MAX); | |
1959 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1960 | PUSHs(SvTIED_obj(sv, mg)); |
1961 | if (flags & G_UNDEF_FILL) { | |
1962 | while (argc--) { | |
efaf3674 | 1963 | PUSHs(&PL_sv_undef); |
93965878 | 1964 | } |
67549bd2 | 1965 | } else if (argc > 0) { |
046b0c7d NC |
1966 | va_list args; |
1967 | va_start(args, argc); | |
1968 | ||
1969 | do { | |
35bc1e35 JK |
1970 | SV *const this_sv = va_arg(args, SV *); |
1971 | PUSHs(this_sv); | |
046b0c7d NC |
1972 | } while (--argc); |
1973 | ||
1974 | va_end(args); | |
88e89b8a | 1975 | } |
463ee0b2 | 1976 | PUTBACK; |
efaf3674 | 1977 | if (flags & G_DISCARD) { |
36925d9e | 1978 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1979 | } |
1980 | else { | |
36925d9e | 1981 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
efaf3674 DM |
1982 | ret = *PL_stack_sp--; |
1983 | } | |
1984 | POPSTACK; | |
d1d7a15d NC |
1985 | if (flags & G_WRITING_TO_STDERR) |
1986 | FREETMPS; | |
efaf3674 DM |
1987 | LEAVE; |
1988 | return ret; | |
1989 | } | |
1990 | ||
efaf3674 | 1991 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 1992 | |
efaf3674 | 1993 | STATIC SV* |
36925d9e | 1994 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
1995 | int n, SV *val) |
1996 | { | |
efaf3674 DM |
1997 | SV* arg1 = NULL; |
1998 | ||
1999 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
2000 | ||
2001 | if (mg->mg_ptr) { | |
2002 | if (mg->mg_len >= 0) { | |
db4b3a1d | 2003 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
efaf3674 DM |
2004 | } |
2005 | else if (mg->mg_len == HEf_SVKEY) | |
2006 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
2007 | } | |
2008 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
db4b3a1d | 2009 | arg1 = newSViv((IV)(mg->mg_len)); |
efaf3674 DM |
2010 | sv_2mortal(arg1); |
2011 | } | |
2012 | if (!arg1) { | |
046b0c7d | 2013 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 2014 | } |
046b0c7d | 2015 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e | 2016 | } |
2017 | ||
76e3520e | 2018 | STATIC int |
36925d9e | 2019 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 2020 | { |
efaf3674 | 2021 | SV* ret; |
463ee0b2 | 2022 | |
7918f24d NC |
2023 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
2024 | ||
efaf3674 DM |
2025 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
2026 | if (ret) | |
2027 | sv_setsv(sv, ret); | |
a0d0e21e LW |
2028 | return 0; |
2029 | } | |
463ee0b2 | 2030 | |
a0d0e21e | 2031 | int |
864dbfa3 | 2032 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2033 | { |
7918f24d NC |
2034 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
2035 | ||
fd69380d | 2036 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
a0d0e21e | 2037 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 2038 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
2039 | return 0; |
2040 | } | |
2041 | ||
2042 | int | |
864dbfa3 | 2043 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 2044 | { |
b112cff9 DM |
2045 | MAGIC *tmg; |
2046 | SV *val; | |
7918f24d NC |
2047 | |
2048 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2049 | ||
b112cff9 DM |
2050 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2051 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2052 | * public flags indicate its value based on copying from $val. Doing | |
2053 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2054 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2055 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2056 | * enabled, even though taint magic is in the chain. In which case, | |
2057 | * fake up a temporary tainted value (this is easier than temporarily | |
2058 | * re-enabling magic on sv). */ | |
2059 | ||
284167a5 | 2060 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
b112cff9 DM |
2061 | && (tmg->mg_len & 1)) |
2062 | { | |
2063 | val = sv_mortalcopy(sv); | |
2064 | SvTAINTED_on(val); | |
2065 | } | |
2066 | else | |
2067 | val = sv; | |
2068 | ||
36925d9e | 2069 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2070 | return 0; |
2071 | } | |
2072 | ||
2073 | int | |
864dbfa3 | 2074 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2075 | { |
7918f24d NC |
2076 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2077 | ||
4c13be3f | 2078 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2079 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2080 | } |
463ee0b2 | 2081 | |
93965878 NIS |
2082 | |
2083 | U32 | |
864dbfa3 | 2084 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2085 | { |
22846ab4 | 2086 | I32 retval = 0; |
efaf3674 | 2087 | SV* retsv; |
93965878 | 2088 | |
7918f24d NC |
2089 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2090 | ||
36925d9e | 2091 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 DM |
2092 | if (retsv) { |
2093 | retval = SvIV(retsv)-1; | |
22846ab4 AB |
2094 | if (retval < -1) |
2095 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2096 | } |
22846ab4 | 2097 | return (U32) retval; |
93965878 NIS |
2098 | } |
2099 | ||
cea2e8a9 GS |
2100 | int |
2101 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2102 | { |
7918f24d NC |
2103 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2104 | ||
36925d9e | 2105 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2106 | return 0; |
2107 | } | |
2108 | ||
2109 | int | |
864dbfa3 | 2110 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2111 | { |
efaf3674 | 2112 | SV* ret; |
463ee0b2 | 2113 | |
7918f24d NC |
2114 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2115 | ||
36925d9e RZ |
2116 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
2117 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); | |
efaf3674 DM |
2118 | if (ret) |
2119 | sv_setsv(key,ret); | |
79072805 LW |
2120 | return 0; |
2121 | } | |
2122 | ||
2123 | int | |
1146e912 | 2124 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2125 | { |
7918f24d NC |
2126 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2127 | ||
36925d9e | 2128 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2129 | } |
a0d0e21e | 2130 | |
a3bcc51e TP |
2131 | SV * |
2132 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2133 | { | |
5fcbf73d | 2134 | SV *retval; |
ad64d0ec NC |
2135 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2136 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2137 | |
7918f24d NC |
2138 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2139 | ||
a3bcc51e TP |
2140 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2141 | SV *key; | |
bfcb3514 | 2142 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2143 | /* we are in an iteration so the hash cannot be empty */ |
2144 | return &PL_sv_yes; | |
2145 | /* no xhv_eiter so now use FIRSTKEY */ | |
2146 | key = sv_newmortal(); | |
ad64d0ec | 2147 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2148 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2149 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2150 | } | |
2151 | ||
2152 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2153 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2154 | if (!retval) |
5fcbf73d | 2155 | retval = &PL_sv_undef; |
a3bcc51e TP |
2156 | return retval; |
2157 | } | |
2158 | ||
a0d0e21e | 2159 | int |
864dbfa3 | 2160 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2161 | { |
089b5c60 | 2162 | SV **svp; |
7918f24d NC |
2163 | |
2164 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2165 | ||
089b5c60 NC |
2166 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2167 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2168 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2169 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2170 | } |
2171 | ||
2172 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2173 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a FC |
2174 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
2175 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); | |
089b5c60 | 2176 | |
8772537c | 2177 | if (svp && SvIOKp(*svp)) { |
88df5f01 FC |
2178 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2179 | if (o) { | |
2180 | #ifdef PERL_DEBUG_READONLY_OPS | |
2181 | Slab_to_rw(OpSLAB(o)); | |
2182 | #endif | |
2183 | /* set or clear breakpoint in the relevant control op */ | |
089b5c60 | 2184 | if (SvTRUE(sv)) |
88df5f01 | 2185 | o->op_flags |= OPf_SPECIAL; |
8772537c | 2186 | else |
88df5f01 FC |
2187 | o->op_flags &= ~OPf_SPECIAL; |
2188 | #ifdef PERL_DEBUG_READONLY_OPS | |
2189 | Slab_to_ro(OpSLAB(o)); | |
2190 | #endif | |
8772537c | 2191 | } |
5df8de69 | 2192 | } |
79072805 LW |
2193 | return 0; |
2194 | } | |
2195 | ||
2196 | int | |
8772537c | 2197 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2198 | { |
502c6561 | 2199 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2200 | |
2201 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2202 | ||
83bf042f | 2203 | if (obj) { |
e1dccc0d | 2204 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2205 | } else { |
3773545d | 2206 | sv_set_undef(sv); |
83bf042f | 2207 | } |
79072805 LW |
2208 | return 0; |
2209 | } | |
2210 | ||
2211 | int | |
864dbfa3 | 2212 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2213 | { |
502c6561 | 2214 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2215 | |
2216 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2217 | ||
83bf042f | 2218 | if (obj) { |
e1dccc0d | 2219 | av_fill(obj, SvIV(sv)); |
83bf042f | 2220 | } else { |
a2a5de95 NC |
2221 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2222 | "Attempt to set length of freed array"); | |
83bf042f NC |
2223 | } |
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | int | |
83f29afa VP |
2228 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2229 | { | |
83f29afa VP |
2230 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2231 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2232 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2233 | |
2234 | /* Reset the iterator when the array is cleared */ | |
4803e7f7 Z |
2235 | if (sizeof(IV) == sizeof(SSize_t)) { |
2236 | *((IV *) &(mg->mg_len)) = 0; | |
2237 | } else { | |
2238 | if (mg->mg_ptr) | |
2239 | *((IV *) mg->mg_ptr) = 0; | |
2240 | } | |
83f29afa VP |
2241 | |
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | int | |
83bf042f NC |
2246 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2247 | { | |
7918f24d | 2248 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2249 | PERL_UNUSED_ARG(sv); |
7918f24d | 2250 | |
94f3782b DM |
2251 | /* during global destruction, mg_obj may already have been freed */ |
2252 | if (PL_in_clean_all) | |
1ea47f64 | 2253 | return 0; |
94f3782b | 2254 | |
83bf042f NC |
2255 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2256 | ||
2257 | if (mg) { | |
2258 | /* arylen scalar holds a pointer back to the array, but doesn't own a | |
2259 | reference. Hence the we (the array) are about to go away with it | |
2260 | still pointing at us. Clear its pointer, else it would be pointing | |
2261 | at free memory. See the comment in sv_magic about reference loops, | |
2262 | and why it can't own a reference to us. */ | |
2263 | mg->mg_obj = 0; | |
2264 | } | |
a0d0e21e LW |
2265 | return 0; |
2266 | } | |
2267 | ||
2268 | int | |
864dbfa3 | 2269 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2270 | { |
16eb5365 | 2271 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2272 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2273 | |
2274 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2275 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2276 | |
6174b39a FC |
2277 | if (found && found->mg_len != -1) { |
2278 | STRLEN i = found->mg_len; | |
25fdce4a | 2279 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) |
6174b39a FC |
2280 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); |
2281 | sv_setuv(sv, i); | |
a0d0e21e | 2282 | return 0; |
a0d0e21e | 2283 | } |
3773545d | 2284 | sv_set_undef(sv); |
a0d0e21e LW |
2285 | return 0; |
2286 | } | |
2287 | ||
2288 | int | |
864dbfa3 | 2289 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2290 | { |
16eb5365 | 2291 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2292 | SSize_t pos; |
2293 | STRLEN len; | |
53d44271 | 2294 | MAGIC* found; |
aec43834 | 2295 | const char *s; |
a0d0e21e | 2296 | |
7918f24d | 2297 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2298 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2299 | |
96c2a8ff | 2300 | found = mg_find_mglob(lsv); |
3881461a | 2301 | if (!found) { |
a0d0e21e LW |
2302 | if (!SvOK(sv)) |
2303 | return 0; | |
96c2a8ff | 2304 | found = sv_magicext_mglob(lsv); |
a0d0e21e LW |
2305 | } |
2306 | else if (!SvOK(sv)) { | |
3881461a | 2307 | found->mg_len = -1; |
a0d0e21e LW |
2308 | return 0; |
2309 | } | |
aec43834 | 2310 | s = SvPV_const(lsv, len); |
a0d0e21e | 2311 | |
e1dccc0d | 2312 | pos = SvIV(sv); |
a0ed51b3 | 2313 | |
7e2040f0 | 2314 | if (DO_UTF8(lsv)) { |
19742f39 | 2315 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
a0ed51b3 LW |
2316 | if (ulen) |
2317 | len = ulen; | |
a0ed51b3 LW |
2318 | } |
2319 | ||
a0d0e21e LW |
2320 | if (pos < 0) { |
2321 | pos += len; | |
2322 | if (pos < 0) | |
2323 | pos = 0; | |
2324 | } | |
eb160463 | 2325 | else if (pos > (SSize_t)len) |
a0d0e21e | 2326 | pos = len; |
a0ed51b3 | 2327 | |
3881461a | 2328 | found->mg_len = pos; |
25fdce4a | 2329 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2330 | |
79072805 LW |
2331 | return 0; |
2332 | } | |
2333 | ||
2334 | int | |
864dbfa3 | 2335 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2336 | { |
2337 | STRLEN len; | |
35a4481c | 2338 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2339 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2340 | STRLEN offs = LvTARGOFF(sv); |
2341 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2342 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2343 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2344 | |
2345 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2346 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2347 | |
83f78d1a | 2348 | if (!translate_substr_offsets( |
4ddea69a | 2349 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
83f78d1a FC |
2350 | negoff ? -(IV)offs : (IV)offs, !negoff, |
2351 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
2352 | )) { | |
2353 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); | |
e03e82a0 | 2354 | sv_set_undef(sv); |
83f78d1a FC |
2355 | return 0; |
2356 | } | |
2357 | ||
9aa983d2 | 2358 | if (SvUTF8(lsv)) |
4ddea69a | 2359 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2360 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2361 | if (SvUTF8(lsv)) |
2ef4b674 | 2362 | SvUTF8_on(sv); |
6ff81951 GS |
2363 | return 0; |
2364 | } | |
2365 | ||
2366 | int | |
864dbfa3 | 2367 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2368 | { |
83f78d1a | 2369 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2370 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2371 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2372 | STRLEN lvoff = LvTARGOFF(sv); |
2373 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2374 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2375 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2376 | |
2377 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2378 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2379 | |
a74fb2cd FC |
2380 | SvGETMAGIC(lsv); |
2381 | if (SvROK(lsv)) | |
2382 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), | |
2383 | "Attempt to use reference as lvalue in substr" | |
2384 | ); | |
fc061ed8 FC |
2385 | SvPV_force_nomg(lsv,lsv_len); |
2386 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a FC |
2387 | if (!translate_substr_offsets( |
2388 | lsv_len, | |
2389 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2390 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
2391 | )) | |
2392 | Perl_croak(aTHX_ "substr outside of string"); | |
2393 | oldtarglen = lvlen; | |
1aa99e6b | 2394 | if (DO_UTF8(sv)) { |
73a087f0 | 2395 | sv_utf8_upgrade_nomg(lsv); |
d931b1be | 2396 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
a74fb2cd | 2397 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
7a385470 | 2398 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); |
9aa983d2 JH |
2399 | SvUTF8_on(lsv); |
2400 | } | |
0d336106 | 2401 | else if (SvUTF8(lsv)) { |
5fcbf73d | 2402 | const char *utf8; |
d931b1be | 2403 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
83f78d1a | 2404 | newtarglen = len; |
5fcbf73d | 2405 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); |
a74fb2cd | 2406 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); |
5fcbf73d | 2407 | Safefree(utf8); |
1aa99e6b | 2408 | } |
b76f3ce2 | 2409 | else { |
a74fb2cd | 2410 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
83f78d1a | 2411 | newtarglen = len; |
b76f3ce2 | 2412 | } |
83f78d1a FC |
2413 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2414 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2415 | |
79072805 LW |
2416 | return 0; |
2417 | } | |
2418 | ||
2419 | int | |
864dbfa3 | 2420 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2421 | { |
7918f24d | 2422 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2423 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2424 | #ifdef NO_TAINT_SUPPORT |
2425 | PERL_UNUSED_ARG(mg); | |
2426 | #endif | |
7918f24d | 2427 | |
64ff300b | 2428 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2429 | return 0; |
2430 | } | |
2431 | ||
2432 | int | |
864dbfa3 | 2433 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2434 | { |
7918f24d | 2435 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2436 | PERL_UNUSED_ARG(sv); |
7918f24d | 2437 | |
b01e650a | 2438 | /* update taint status */ |
284167a5 | 2439 | if (TAINT_get) |
b01e650a DM |
2440 | mg->mg_len |= 1; |
2441 | else | |
2442 | mg->mg_len &= ~1; | |
463ee0b2 LW |
2443 | return 0; |
2444 | } | |
2445 | ||
2446 | int | |
864dbfa3 | 2447 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2448 | { |
35a4481c | 2449 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2450 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2451 | |
2452 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2453 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2454 | |
1b92e694 | 2455 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2456 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2457 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2458 | |
6ff81951 GS |
2459 | return 0; |
2460 | } | |
2461 | ||
2462 | int | |
864dbfa3 | 2463 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2464 | { |
7918f24d | 2465 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2466 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2467 | do_vecset(sv); /* XXX slurp this routine */ |
2468 | return 0; | |
2469 | } | |
2470 | ||
13733cde FC |
2471 | SV * |
2472 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2473 | { |
a0714e2c | 2474 | SV *targ = NULL; |
13733cde FC |
2475 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2476 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2477 | assert(mg); | |
5f05dabc | 2478 | if (LvTARGLEN(sv)) { |
68dc0745 | 2479 | if (mg->mg_obj) { |
8772537c | 2480 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2481 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); |
6d822dc4 MS |
2482 | if (he) |
2483 | targ = HeVAL(he); | |
68dc0745 | 2484 | } |
bbfdc870 | 2485 | else if (LvSTARGOFF(sv) >= 0) { |
502c6561 | 2486 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2487 | if (LvSTARGOFF(sv) <= AvFILL(av)) |
ca58dfd9 FC |
2488 | { |
2489 | if (SvRMAGICAL(av)) { | |
2490 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2491 | targ = svp ? *svp : NULL; | |
2492 | } | |
2493 | else | |
bbfdc870 | 2494 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; |
ca58dfd9 | 2495 | } |
68dc0745 | 2496 | } |
46da273f | 2497 | if (targ && (targ != &PL_sv_undef)) { |
68dc0745 | 2498 | /* somebody else defined it for us */ |
2499 | SvREFCNT_dec(LvTARG(sv)); | |
b37c2d43 | 2500 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); |
68dc0745 | 2501 | LvTARGLEN(sv) = 0; |
2502 | SvREFCNT_dec(mg->mg_obj); | |
a0714e2c | 2503 | mg->mg_obj = NULL; |
68dc0745 | 2504 | mg->mg_flags &= ~MGf_REFCOUNTED; |
2505 | } | |
13733cde | 2506 | return targ; |
5f05dabc | 2507 | } |
71be2cbc | 2508 | else |
13733cde FC |
2509 | return LvTARG(sv); |
2510 | } | |
2511 | ||
2512 | int | |
2513 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2514 | { | |
2515 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2516 | ||
2517 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc | 2518 | return 0; |
2519 | } | |
2520 | ||
2521 | int | |
864dbfa3 | 2522 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2523 | { |
7918f24d | 2524 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2525 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2526 | if (LvTARGLEN(sv)) |
68dc0745 | 2527 | vivify_defelem(sv); |
2528 | if (LvTARG(sv)) { | |
5f05dabc | 2529 | sv_setsv(LvTARG(sv), sv); |
68dc0745 | 2530 | SvSETMAGIC(LvTARG(sv)); |
2531 | } | |
5f05dabc | 2532 | return 0; |
2533 | } | |
2534 | ||
71be2cbc | 2535 | void |
864dbfa3 | 2536 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2537 | { |
74e13ce4 | 2538 | MAGIC *mg; |
a0714e2c | 2539 | SV *value = NULL; |
71be2cbc | 2540 | |
7918f24d NC |
2541 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2542 | ||
14befaf4 | 2543 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
71be2cbc | 2544 | return; |
68dc0745 | 2545 | if (mg->mg_obj) { |
8772537c | 2546 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2547 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); |
6d822dc4 MS |
2548 | if (he) |
2549 | value = HeVAL(he); | |
3280af22 | 2550 | if (!value || value == &PL_sv_undef) |
be2597df | 2551 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); |
71be2cbc | 2552 | } |
bbfdc870 FC |
2553 | else if (LvSTARGOFF(sv) < 0) |
2554 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
68dc0745 | 2555 | else { |
502c6561 | 2556 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2557 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) |
a0714e2c | 2558 | LvTARG(sv) = NULL; /* array can't be extended */ |
68dc0745 | 2559 | else { |
bbfdc870 | 2560 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); |
031c6d82 | 2561 | if (!svp || !(value = *svp)) |
bbfdc870 | 2562 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 | 2563 | } |
2564 | } | |
b37c2d43 | 2565 | SvREFCNT_inc_simple_void(value); |
68dc0745 | 2566 | SvREFCNT_dec(LvTARG(sv)); |
2567 | LvTARG(sv) = value; | |
71be2cbc | 2568 | LvTARGLEN(sv) = 0; |
68dc0745 | 2569 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2570 | mg->mg_obj = NULL; |
68dc0745 | 2571 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc | 2572 | } |
2573 | ||
2574 | int | |
1f1dcfb5 FC |
2575 | Perl_magic_setnonelem(pTHX_ SV *sv, MAGIC *mg) |
2576 | { | |
2577 | PERL_ARGS_ASSERT_MAGIC_SETNONELEM; | |
2578 | PERL_UNUSED_ARG(mg); | |
2579 | sv_unmagic(sv, PERL_MAGIC_nonelem); | |
2580 | return 0; | |
2581 | } | |
2582 | ||
2583 | int | |
864dbfa3 | 2584 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2585 | { |
7918f24d | 2586 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2587 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2588 | return 0; | |
810b8aa5 GS |
2589 | } |
2590 | ||
2591 | int | |
864dbfa3 | 2592 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2593 | { |
7918f24d | 2594 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2595 | PERL_UNUSED_CONTEXT; |
0177730e | 2596 | PERL_UNUSED_ARG(sv); |
565764a8 | 2597 | mg->mg_len = -1; |
93a17b20 LW |
2598 | return 0; |
2599 | } | |
2600 | ||
02a48966 DM |
2601 | |
2602 | int | |
2603 | Perl_magic_freemglob(pTHX_ SV *sv, MAGIC *mg) | |
2604 | { | |
2605 | PERL_ARGS_ASSERT_MAGIC_FREEMGLOB; | |
2606 | PERL_UNUSED_ARG(sv); | |
2607 | ||
2608 | /* glob magic uses mg_len as a string length rather than a buffer | |
2609 | * length, so we need to free even with mg_len == 0: hence we can't | |
2610 | * rely on standard magic free handling */ | |
2611 | assert(mg->mg_type == PERL_MAGIC_regex_global && mg->mg_len >= -1); | |
2612 | Safefree(mg->mg_ptr); | |
2613 | mg->mg_ptr = NULL; | |
2614 | return 0; | |
2615 | } | |
2616 | ||
2617 | ||
93a17b20 | 2618 | int |
864dbfa3 | 2619 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2620 | { |
35a4481c | 2621 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2622 | |
7918f24d NC |
2623 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2624 | ||
79072805 | 2625 | if (uf && uf->uf_set) |
24f81a43 | 2626 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2627 | return 0; |
2628 | } | |
2629 | ||
c277df42 | 2630 | int |
faf82a0b AE |
2631 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2632 | { | |
488344d2 | 2633 | const char type = mg->mg_type; |
7918f24d NC |
2634 | |
2635 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2636 | ||
a5c7cb08 DM |
2637 | assert( type == PERL_MAGIC_fm |
2638 | || type == PERL_MAGIC_qr | |
2639 | || type == PERL_MAGIC_bm); | |
488344d2 | 2640 | return sv_unmagic(sv, type); |
faf82a0b AE |
2641 | } |
2642 | ||
7a4c00b4 | 2643 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2644 | int |
864dbfa3 | 2645 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2646 | { |
7918f24d NC |
2647 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2648 | ||
bbce6d69 | 2649 | /* |
838b5b74 | 2650 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 | 2651 | * and vanished with a faint plop. |
2652 | */ | |
96a5add6 | 2653 | PERL_UNUSED_CONTEXT; |
8772537c | 2654 | PERL_UNUSED_ARG(sv); |
7a4c00b4 | 2655 | if (mg->mg_ptr) { |
2656 | Safefree(mg->mg_ptr); | |
2657 | mg->mg_ptr = NULL; | |
565764a8 | 2658 | mg->mg_len = -1; |
7a4c00b4 | 2659 | } |
bbce6d69 | 2660 | return 0; |
2661 | } | |
a457b73c DM |
2662 | |
2663 | int | |
2664 | Perl_magic_freecollxfrm(pTHX_ SV *sv, MAGIC *mg) | |
2665 | { | |
2666 | PERL_ARGS_ASSERT_MAGIC_FREECOLLXFRM; | |
2667 | PERL_UNUSED_ARG(sv); | |
2668 | ||
2669 | /* Collate magic uses mg_len as a string length rather than a buffer | |
2670 | * length, so we need to free even with mg_len == 0: hence we can't | |
2671 | * rely on standard magic free handling */ | |
fb072d00 TC |
2672 | if (mg->mg_len >= 0) { |
2673 | assert(mg->mg_type == PERL_MAGIC_collxfrm); | |
2674 | Safefree(mg->mg_ptr); | |
2675 | mg->mg_ptr = NULL; | |
2676 | } | |
2677 | ||
a457b73c DM |
2678 | return 0; |
2679 | } | |
7a4c00b4 | 2680 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2681 | |
7e8c5dac HS |
2682 | /* Just clear the UTF-8 cache data. */ |
2683 | int | |
2684 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2685 | { | |
7918f24d | 2686 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2687 | PERL_UNUSED_CONTEXT; |
8772537c | 2688 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2689 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2690 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2691 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2692 | return 0; | |
2693 | } | |
2694 | ||
bbce6d69 | 2695 | int |
032a4919 DM |
2696 | Perl_magic_freeutf8(pTHX_ SV *sv, MAGIC *mg) |
2697 | { | |
2698 | PERL_ARGS_ASSERT_MAGIC_FREEUTF8; | |
2699 | PERL_UNUSED_ARG(sv); | |
2700 | ||
2701 | /* utf8 magic uses mg_len as a string length rather than a buffer | |
2702 | * length, so we need to free even with mg_len == 0: hence we can't | |
2703 | * rely on standard magic free handling */ | |
2704 | assert(mg->mg_type == PERL_MAGIC_utf8 && mg->mg_len >= -1); | |
2705 | Safefree(mg->mg_ptr); | |
2706 | mg->mg_ptr = NULL; | |
2707 | return 0; | |
2708 | } | |
2709 | ||
2710 | ||
2711 | int | |
9cce4f9a FC |
2712 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2713 | { | |
9782ce69 | 2714 | const char *bad = NULL; |
9cce4f9a | 2715 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2716 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2717 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2718 | case OPpLVREF_SV: | |
2719 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) | |
2720 | bad = " SCALAR"; | |
2721 | break; | |
2722 | case OPpLVREF_AV: | |
2723 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) | |
2724 | bad = "n ARRAY"; | |
2725 | break; | |
2726 | case OPpLVREF_HV: | |
2727 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) | |
2728 | bad = " HASH"; | |
2729 | break; | |
2730 | case OPpLVREF_CV: | |
2731 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) | |
2732 | bad = " CODE"; | |
2733 | } | |
2734 | if (bad) | |
26a50d99 | 2735 | /* diag_listed_as: Assigned value is not %s reference */ |
9782ce69 | 2736 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); |
c146a62a FC |
2737 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2738 | case 0: | |
2739 | { | |
2740 | SV * const old = PAD_SV(mg->mg_len); | |
2741 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2742 | SvREFCNT_dec(old); | |
2743 | break; | |
2744 | } | |
2745 | case SVt_PVGV: | |
2746 | gv_setref(mg->mg_obj, sv); | |
2747 | SvSETMAGIC(mg->mg_obj); | |
6102323a FC |
2748 | break; |
2749 | case SVt_PVAV: | |
2750 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), | |
2751 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
5f94141d FC |
2752 | break; |
2753 | case SVt_PVHV: | |
7fcb36d5 JH |
2754 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
2755 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); | |
c146a62a | 2756 | } |
d39c26a6 FC |
2757 | if (mg->mg_flags & MGf_PERSIST) |
2758 | NOOP; /* This sv is in use as an iterator var and will be reused, | |
2759 | so we must leave the magic. */ | |
2760 | else | |
2761 | /* This sv could be returned by the assignment op, so clear the | |
2762 | magic, as lvrefs are an implementation detail that must not be | |
2763 | leaked to the user. */ | |
2764 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2765 | return 0; |
2766 | } | |
2767 | ||
f1540bed JH |
2768 | static void |
2769 | S_set_dollarzero(pTHX_ SV *sv) | |
2770 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2771 | { | |
2772 | #ifdef USE_ITHREADS | |
f1540bed JH |
2773 | #endif |
2774 | const char *s; | |
2775 | STRLEN len; | |
f1540bed JH |
2776 | #ifdef HAS_SETPROCTITLE |
2777 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2778 | * show a string from the process struct and provide | |
2779 | * the setproctitle() routine to manipulate that. */ | |
2780 | if (PL_origalen != 1) { | |
2781 | s = SvPV_const(sv, len); | |
38626956 | 2782 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2783 | /* The leading "-" removes the "perl: " prefix, |
2784 | * but not the "(perl) suffix from the ps(1) | |
2785 | * output, because that's what ps(1) shows if the | |
2786 | * argv[] is modified. */ | |
2787 | setproctitle("-%s", s); | |
2788 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2789 | /* This doesn't really work if you assume that | |
2790 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2791 | * because in ps(1) output the result will be like | |
2792 | * sprintf("perl: %s (perl)", s) | |
2793 | * I guess this is a security feature: | |
2794 | * one (a user process) cannot get rid of the original name. | |
2795 | * --jhi */ | |
2796 | setproctitle("%s", s); | |
2797 | # endif | |
2798 | } | |
2799 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2800 | if (PL_origalen != 1) { | |
2801 | union pstun un; | |
2802 | s = SvPV_const(sv, len); | |
2803 | un.pst_command = (char *)s; | |
2804 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2805 | } | |
2806 | #else | |
2807 | if (PL_origalen > 1) { | |
4f3e04fd | 2808 | I32 i; |
f1540bed JH |
2809 | /* PL_origalen is set in perl_parse(). */ |
2810 | s = SvPV_force(sv,len); | |
2811 | if (len >= (STRLEN)PL_origalen-1) { | |
2812 | /* Longer than original, will be truncated. We assume that | |
2813 | * PL_origalen bytes are available. */ | |
2814 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2815 | } | |
2816 | else { | |
2817 | /* Shorter than original, will be padded. */ | |
2818 | #ifdef PERL_DARWIN | |
2819 | /* Special case for Mac OS X: see [perl #38868] */ | |
2820 | const int pad = 0; | |
2821 | #else | |
2822 | /* Is the space counterintuitive? Yes. | |
2823 | * (You were expecting \0?) | |
2824 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2825 | * --jhi */ | |
2826 | const int pad = ' '; | |
2827 | #endif | |
2828 | Copy(s, PL_origargv[0], len, char); | |
2829 | PL_origargv[0][len] = 0; | |
2830 | memset(PL_origargv[0] + len + 1, | |
2831 | pad, PL_origalen - len - 1); | |
2832 | } | |
2833 | PL_origargv[0][PL_origalen-1] = 0; | |
2834 | for (i = 1; i < PL_origargc; i++) | |
2835 | PL_origargv[i] = 0; | |
2836 | #ifdef HAS_PRCTL_SET_NAME | |
2837 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2838 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2839 | /* diag_listed_as: SKIPME */ | |
2840 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2841 | } | |
2842 | #endif | |
2843 | } | |
2844 | #endif | |
2845 | } | |
2846 | ||
9cce4f9a | 2847 | int |
864dbfa3 | 2848 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2849 | { |
20b7effb | 2850 | #ifdef USE_ITHREADS |
20b7effb | 2851 | #endif |
eb578fdb KW |
2852 | I32 paren; |
2853 | const REGEXP * rx; | |
79072805 | 2854 | I32 i; |
8990e307 | 2855 | STRLEN len; |
125b9982 | 2856 | MAGIC *tmg; |
2fdbfb4d | 2857 | |
7918f24d NC |
2858 | PERL_ARGS_ASSERT_MAGIC_SET; |
2859 | ||
e91d8259 | 2860 | if (!mg->mg_ptr) { |
960b831f | 2861 | paren = mg->mg_len; |
1e05feb3 | 2862 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2863 | setparen_got_rx: |
2fdbfb4d | 2864 | CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv); |
1e05feb3 | 2865 | } else { |
2fdbfb4d AB |
2866 | /* Croak with a READONLY error when a numbered match var is |
2867 | * set without a previous pattern match. Unless it's C<local $1> | |
2868 | */ | |
e91d8259 | 2869 | croakparen: |
2fdbfb4d | 2870 | if (!PL_localizing) { |
cb077ed2 | 2871 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2872 | } |
2873 | } | |
e91d8259 NC |
2874 | return 0; |
2875 | } | |
2876 | ||
2877 | switch (*mg->mg_ptr) { | |
748a9306 | 2878 | case '\001': /* ^A */ |
f2da823f FC |
2879 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2880 | else SvOK_off(PL_bodytarget); | |
64eff8b7 DM |
2881 | FmLINES(PL_bodytarget) = 0; |
2882 | if (SvPOK(PL_bodytarget)) { | |
2883 | char *s = SvPVX(PL_bodytarget); | |
0687887e KW |
2884 | char *e = SvEND(PL_bodytarget); |
2885 | while ( ((s = (char *) memchr(s, '\n', e - s))) ) { | |
64eff8b7 DM |
2886 | FmLINES(PL_bodytarget)++; |
2887 | s++; | |
2888 | } | |
2889 | } | |
125b9982 | 2890 | /* mg_set() has temporarily made sv non-magical */ |
284167a5 | 2891 | if (TAINTING_get) { |
125b9982 NT |
2892 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) |
2893 | SvTAINTED_on(PL_bodytarget); | |
2894 | else | |
2895 | SvTAINTED_off(PL_bodytarget); | |
2896 | } | |
748a9306 | 2897 | break; |
49460fe6 | 2898 | case '\003': /* ^C */ |
f2338a2e | 2899 | PL_minus_c = cBOOL(SvIV(sv)); |
49460fe6 NIS |
2900 | break; |
2901 | ||
79072805 | 2902 | case '\004': /* ^D */ |
b4ab917c | 2903 | #ifdef DEBUGGING |
a9e2d2bf DM |
2904 | { |
2905 | const char *s = SvPV_nolen_const(sv); | |
2906 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2907 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2908 | dump_all_perl(!DEBUG_B_TEST); | |
2909 | } | |
b4ab917c | 2910 | #else |
38ab35f8 | 2911 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2912 | #endif |
79072805 | 2913 | break; |
28f23441 | 2914 | case '\005': /* ^E */ |
d0063567 | 2915 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2916 | #ifdef VMS |
38ab35f8 | 2917 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2918 | #elif defined(WIN32) |
d0063567 | 2919 | SetLastError( SvIV(sv) ); |
2abc681d | 2920 | #elif defined(OS2) |
38ab35f8 | 2921 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2922 | #else |
d0063567 | 2923 | /* will anyone ever use this? */ |
38ab35f8 | 2924 | SETERRNO(SvIV(sv), 4); |
22fae026 | 2925 | #endif |
d0063567 | 2926 | } |
fd503f5c DIM |
2927 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) |
2928 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); | |
d0063567 | 2929 | break; |
79072805 | 2930 | case '\006': /* ^F */ |
9f601cf3 TC |
2931 | if (mg->mg_ptr[1] == '\0') { |
2932 | PL_maxsysfd = SvIV(sv); | |
2933 | } | |
79072805 | 2934 | break; |
a0d0e21e | 2935 | case '\010': /* ^H */ |
efa571ab KW |
2936 | { |
2937 | U32 save_hints = PL_hints; | |
5d382c25 | 2938 | PL_hints = SvUV(sv); |
efa571ab KW |
2939 | |
2940 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2941 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2942 | notify_parser_that_changed_to_utf8(); | |
2943 | } | |
2944 | } | |
a0d0e21e | 2945 | break; |
9d116dd7 | 2946 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
43c5f42d | 2947 | Safefree(PL_inplace); |
bd61b366 | 2948 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; |
da78da6e | 2949 | break; |
d9bad346 FC |
2950 | case '\016': /* ^N */ |
2951 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) | |
2952 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2953 | goto croakparen; | |
28f23441 | 2954 | case '\017': /* ^O */ |
ac27b0f5 | 2955 | if (*(mg->mg_ptr+1) == '\0') { |
43c5f42d | 2956 | Safefree(PL_osname); |
bd61b366 | 2957 | PL_osname = NULL; |
3511154c DM |
2958 | if (SvOK(sv)) { |
2959 | TAINT_PROPER("assigning to $^O"); | |
2e0de35c | 2960 | PL_osname = savesvpv(sv); |
3511154c | 2961 | } |
ac27b0f5 NIS |
2962 | } |
2963 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
8b850bd5 NC |
2964 | STRLEN len; |
2965 | const char *const start = SvPV(sv, len); | |
b54fc2b6 | 2966 | const char *out = (const char*)memchr(start, '\0', len); |
8b850bd5 | 2967 | SV *tmp; |
8b850bd5 NC |
2968 | |
2969 | ||
2970 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
f747ebd6 | 2971 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; |
8b850bd5 NC |
2972 | |
2973 | /* Opening for input is more common than opening for output, so | |
2974 | ensure that hints for input are sooner on linked list. */ | |
59cd0e26 | 2975 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, |
f747ebd6 Z |
2976 | SvUTF8(sv)) |
2977 | : newSVpvs_flags("", SvUTF8(sv)); | |
2978 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2979 | mg_set(tmp); | |
8b850bd5 | 2980 | |
f747ebd6 Z |
2981 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, |
2982 | SvUTF8(sv)); | |
2983 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2984 | mg_set(tmp); | |
ac27b0f5 | 2985 | } |
28f23441 | 2986 | break; |
79072805 | 2987 | case '\020': /* ^P */ |
2fdbfb4d AB |
2988 | PL_perldb = SvIV(sv); |
2989 | if (PL_perldb && !PL_DBsingle) | |
2990 | init_debugger(); | |
9b9e0be4 | 2991 | break; |
79072805 | 2992 | case '\024': /* ^T */ |
88e89b8a | 2993 | #ifdef BIG_TIME |
6b88bc9c | 2994 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 2995 | #else |
38ab35f8 | 2996 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 2997 | #endif |
79072805 | 2998 | break; |
e07ea26a NC |
2999 | case '\025': /* ^UTF8CACHE */ |
3000 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { | |
3001 | PL_utf8cache = (signed char) sv_2iv(sv); | |
3002 | } | |
3003 | break; | |
fde18df1 | 3004 | case '\027': /* ^W & $^WARNING_BITS */ |
4438c4b7 JH |
3005 | if (*(mg->mg_ptr+1) == '\0') { |
3006 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
38ab35f8 | 3007 | i = SvIV(sv); |
ac27b0f5 | 3008 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) |
0453d815 | 3009 | | (i ? G_WARN_ON : G_WARN_OFF) ; |
4438c4b7 | 3010 | } |
599cee73 | 3011 | } |
0a378802 | 3012 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { |
4438c4b7 | 3013 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { |
7e4f0450 | 3014 | if (!SvPOK(sv)) { |
1943af61 | 3015 | free_and_set_cop_warnings(&PL_compiling, pWARN_STD); |
d775746e GS |
3016 | break; |
3017 | } | |
f4fc7782 | 3018 | { |
b5477537 | 3019 | STRLEN len, i; |
006c1a1d Z |
3020 | int not_none = 0, not_all = 0; |
3021 | const U8 * const ptr = (const U8 *)SvPV_const(sv, len) ; | |
f4fc7782 | 3022 | for (i = 0 ; i < len ; ++i) { |
006c1a1d Z |
3023 | not_none |= ptr[i]; |
3024 | not_all |= ptr[i] ^ 0x55; | |
f4fc7782 | 3025 | } |
006c1a1d | 3026 | if (!not_none) { |
1943af61 | 3027 | free_and_set_cop_warnings(&PL_compiling, pWARN_NONE); |
006c1a1d | 3028 | } else if (len >= WARNsize && !not_all) { |
1943af61 | 3029 | free_and_set_cop_warnings(&PL_compiling, pWARN_ALL); |
94c8b9c1 N |
3030 | PL_dowarn |= G_WARN_ONCE ; |
3031 | } | |
3032 | else { | |
3033 | STRLEN len; | |
3034 | const char *const p = SvPV_const(sv, len); | |
3035 | ||
3036 | PL_compiling.cop_warnings | |
3037 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, | |
72dc9ed5 NC |
3038 | p, len); |
3039 | ||
94c8b9c1 | 3040 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
d3a7d8c7 | 3041 | PL_dowarn |= G_WARN_ONCE ; |
94c8b9c1 | 3042 | } |
f4fc7782 | 3043 | |
d3a7d8c7 | 3044 | } |
4438c4b7 | 3045 | } |
971a9dd3 | 3046 | } |
8ca2a5d6 DD |
3047 | #ifdef WIN32 |
3048 | else if (strEQ(mg->mg_ptr+1, "IN32_SLOPPY_STAT")) { | |
4737815a | 3049 | w32_sloppystat = SvTRUE(sv); |
8ca2a5d6 DD |
3050 | } |
3051 | #endif | |
79072805 LW |
3052 | break; |
3053 | case '.': | |
3280af22 NIS |
3054 | if (PL_localizing) { |
3055 | if (PL_localizing == 1) | |
7766f137 | 3056 | SAVESPTR(PL_last_in_gv); |
748a9306 | 3057 | } |
3280af22 | 3058 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) |
632db599 | 3059 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); |
79072805 LW |
3060 | break; |
3061 | case '^': | |
acbe1b9d | 3062 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3063 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3064 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3065 | break; |
3066 | case '~': | |
acbe1b9d | 3067 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3068 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3069 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3070 | break; |
3071 | case '=': | |
acbe1b9d | 3072 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3073 | break; |
3074 | case '-': | |
acbe1b9d FC |
3075 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3076 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
099be4f1 | 3077 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; |
79072805 LW |
3078 | break; |
3079 | case '%': | |
acbe1b9d | 3080 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3081 | break; |
3082 | case '|': | |
4b65379b | 3083 | { |
099be4f1 | 3084 | IO * const io = GvIO(PL_defoutgv); |
720f287d AB |
3085 | if(!io) |
3086 | break; | |
38ab35f8 | 3087 | if ((SvIV(sv)) == 0) |
4b65379b CS |
3088 | IoFLAGS(io) &= ~IOf_FLUSH; |
3089 | else { | |
3090 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
3091 | PerlIO *ofp = IoOFP(io); | |
3092 | if (ofp) | |
3093 | (void)PerlIO_flush(ofp); | |
3094 | IoFLAGS(io) |= IOf_FLUSH; | |
3095 | } | |
3096 | } | |
79072805 LW |
3097 | } |
3098 | break; | |
79072805 | 3099 | case '/': |
1ab48e3a | 3100 | { |
1ab48e3a | 3101 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3102 | SV *referent = SvRV(sv); |
3103 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3104 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3105 | * the alternative is to copy pretty much the entire | |
3106 | * sv_reftype() into this routine, or to do a full string | |
3107 | * comparison on the return of sv_reftype() both of which | |
3108 | * make me feel worse! NOTE, do not modify this comment | |
3109 | * without reviewing the corresponding comment in | |
3110 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3111 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3112 | IV val = SvIV(referent); |
1ab48e3a | 3113 | if (val <= 0) { |
520b6fb6 DIM |
3114 | sv_setsv(sv, PL_rs); |
3115 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3116 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3117 | } |
3118 | } else { | |
ddce084a | 3119 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3120 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3121 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3122 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3123 | } |
3124 | } | |
b3a2acfa | 3125 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3126 | PL_rs = newSVsv(sv); |
b3a2acfa | 3127 | } |
79072805 LW |
3128 | break; |
3129 | case '\\': | |
ef8d46e8 | 3130 | SvREFCNT_dec(PL_ors_sv); |
6bc2995b | 3131 | if (SvOK(sv)) { |
7889fe52 | 3132 | PL_ors_sv = newSVsv(sv); |
009c130f | 3133 | } |
e3c19b7b | 3134 | else { |
a0714e2c | 3135 | PL_ors_sv = NULL; |
e3c19b7b | 3136 | } |
79072805 | 3137 | break; |
7d69d4a6 FC |
3138 | case '[': |
3139 | if (SvIV(sv) != 0) | |
3140 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3141 | break; | |
79072805 | 3142 | case '?': |
ff0cee69 | 3143 | #ifdef COMPLEX_STATUS |
6b88bc9c | 3144 | if (PL_localizing == 2) { |
41cb7b2b | 3145 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
3146 | PL_statusvalue = LvTARGOFF(sv); |
3147 | PL_statusvalue_vms = LvTARGLEN(sv); | |
ff0cee69 | 3148 | } |
3149 | else | |
3150 | #endif | |
3151 | #ifdef VMSISH_STATUS | |
3152 | if (VMSISH_STATUS) | |
fb38d079 | 3153 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); |
ff0cee69 | 3154 | else |
3155 | #endif | |
38ab35f8 | 3156 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
79072805 LW |
3157 | break; |
3158 | case '!': | |
93189314 JH |
3159 | { |
3160 | #ifdef VMS | |
3161 | # define PERL_VMS_BANG vaxc$errno | |
3162 | #else | |
3163 | # define PERL_VMS_BANG 0 | |
3164 | #endif | |
79c32fc2 | 3165 | #if defined(WIN32) |
c9beaf97 SH |
3166 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3167 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
3168 | #else | |
91487cfc | 3169 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
93189314 | 3170 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); |
c9beaf97 | 3171 | #endif |
93189314 | 3172 | } |
79072805 LW |
3173 | break; |
3174 | case '<': | |
985213f2 | 3175 | { |
b469f1e0 | 3176 | /* XXX $< currently silently ignores failures */ |
dfff4baf | 3177 | const Uid_t new_uid = SvUID(sv); |
985213f2 | 3178 | PL_delaymagic_uid = new_uid; |
3280af22 NIS |
3179 | if (PL_delaymagic) { |
3180 | PL_delaymagic |= DM_RUID; | |
79072805 LW |
3181 | break; /* don't do magic till later */ |
3182 | } | |
3183 | #ifdef HAS_SETRUID | |
b469f1e0 | 3184 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3185 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3186 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3187 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3188 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3189 | #else |
985213f2 | 3190 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3191 | # ifdef PERL_DARWIN |
75870ed3 | 3192 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
985213f2 | 3193 | if (new_uid != 0 && PerlProc_getuid() == 0) |
b469f1e0 | 3194 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3195 | # endif |
b469f1e0 | 3196 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
75870ed3 | 3197 | } else { |
cea2e8a9 | 3198 | Perl_croak(aTHX_ "setruid() not implemented"); |
a0d0e21e | 3199 | } |
79072805 | 3200 | #endif |
79072805 | 3201 | break; |
985213f2 | 3202 | } |
79072805 | 3203 | case '>': |
985213f2 | 3204 | { |
b469f1e0 | 3205 | /* XXX $> currently silently ignores failures */ |
dfff4baf | 3206 | const Uid_t new_euid = SvUID(sv); |
985213f2 | 3207 | PL_delaymagic_euid = new_euid; |
3280af22 NIS |
3208 | if (PL_delaymagic) { |
3209 | PL_delaymagic |= DM_EUID; | |
79072805 LW |
3210 | break; /* don't do magic till later */ |
3211 | } | |
3212 | #ifdef HAS_SETEUID | |
b469f1e0 | 3213 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3214 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3215 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3216 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3217 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3218 | #else |
985213f2 | 3219 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
b469f1e0 | 3220 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); |
a0d0e21e | 3221 | else { |
cea2e8a9 | 3222 | Perl_croak(aTHX_ "seteuid() not implemented"); |
a0d0e21e | 3223 | } |
79072805 | 3224 | #endif |
79072805 | 3225 | break; |
985213f2 | 3226 | } |
79072805 | 3227 | case '(': |
985213f2 | 3228 | { |
b469f1e0 | 3229 | /* XXX $( currently silently ignores failures */ |
dfff4baf | 3230 | const Gid_t new_gid = SvGID(sv); |
985213f2 | 3231 | PL_delaymagic_gid = new_gid; |
3280af22 NIS |
3232 | if (PL_delaymagic) { |
3233 | PL_delaymagic |= DM_RGID; | |
79072805 LW |
3234 | break; /* don't do magic till later */ |
3235 | } | |
3236 | #ifdef HAS_SETRGID | |
b469f1e0 | 3237 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3238 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3239 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3240 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3241 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3242 | #else |
985213f2 | 3243 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
b469f1e0 | 3244 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); |
748a9306 | 3245 | else { |
cea2e8a9 | 3246 | Perl_croak(aTHX_ "setrgid() not implemented"); |
748a9306 | 3247 | } |
79072805 | 3248 | #endif |
79072805 | 3249 | break; |
985213f2 | 3250 | } |
79072805 | 3251 | case ')': |
985213f2 | 3252 | { |
0635704a HS |
3253 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3254 | * but you can override it if you need to. | |
3255 | */ | |
3256 | #ifndef INVALID_GID | |
3257 | #define INVALID_GID ((Gid_t)-1) | |
3258 | #endif | |
b469f1e0 | 3259 | /* XXX $) currently silently ignores failures */ |
dfff4baf | 3260 | Gid_t new_egid; |
5cd24f17 | 3261 | #ifdef HAS_SETGROUPS |
3262 | { | |
b83604b4 | 3263 | const char *p = SvPV_const(sv, len); |
757f63d8 | 3264 | Groups_t *gary = NULL; |
79e302e6 MM |
3265 | const char* p_end = p + len; |
3266 | const char* endptr = p_end; | |
22ff3130 | 3267 | UV uv; |
fb4089e0 | 3268 | #ifdef _SC_NGROUPS_MAX |
3269 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3270 | ||
3271 | if (maxgrp < 0) | |
3272 | maxgrp = NGROUPS; | |
3273 | #else | |
3274 | int maxgrp = NGROUPS; | |
3275 | #endif | |
757f63d8 SP |
3276 | |
3277 | while (isSPACE(*p)) | |
3278 | ++p; | |
22ff3130 HS |
3279 | if (grok_atoUV(p, &uv, &endptr)) |
3280 | new_egid = (Gid_t)uv; | |
3281 | else { | |
0635704a | 3282 | new_egid = INVALID_GID; |
22ff3130 HS |
3283 | endptr = NULL; |
3284 | } | |
fb4089e0 | 3285 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3286 | if (endptr == NULL) |
3287 | break; | |
3288 | p = endptr; | |
79e302e6 | 3289 | endptr = p_end; |
757f63d8 SP |
3290 | while (isSPACE(*p)) |
3291 | ++p; | |
3292 | if (!*p) | |
3293 | break; | |
fdadaf77 | 3294 | if (!gary) |
757f63d8 SP |
3295 | Newx(gary, i + 1, Groups_t); |
3296 | else | |
3297 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3298 | if (grok_atoUV(p, &uv, &endptr)) |
3299 | gary[i] = (Groups_t)uv; | |
3300 | else { | |
0635704a | 3301 | gary[i] = INVALID_GID; |
22ff3130 HS |
3302 | endptr = NULL; |
3303 | } | |
757f63d8 SP |
3304 | } |
3305 | if (i) | |
b469f1e0 | 3306 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
f5a63d97 | 3307 | Safefree(gary); |
5cd24f17 | 3308 | } |
3309 | #else /* HAS_SETGROUPS */ | |
dfff4baf | 3310 | new_egid = SvGID(sv); |
5cd24f17 | 3311 | #endif /* HAS_SETGROUPS */ |
985213f2 | 3312 | PL_delaymagic_egid = new_egid; |
3280af22 NIS |
3313 | if (PL_delaymagic) { |
3314 | PL_delaymagic |= DM_EGID; | |
79072805 LW |
3315 | break; /* don't do magic till later */ |
3316 | } | |
3317 | #ifdef HAS_SETEGID | |
b469f1e0 | 3318 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3319 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3320 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3321 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3322 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3323 | #else |
985213f2 | 3324 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
b469f1e0 | 3325 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); |
748a9306 | 3326 | else { |
cea2e8a9 | 3327 | Perl_croak(aTHX_ "setegid() not implemented"); |
748a9306 | 3328 | } |
79072805 | 3329 | #endif |
79072805 | 3330 | break; |
985213f2 | 3331 | } |
79072805 | 3332 | case ':': |
2d8e6c8d | 3333 | PL_chopset = SvPV_force(sv,len); |
79072805 | 3334 | break; |
9cdac2a2 FC |
3335 | case '$': /* $$ */ |
3336 | /* Store the pid in mg->mg_obj so we can tell when a fork has | |
3337 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3338 | if (isGV(mg->mg_obj)) { | |
3339 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3340 | SvREFCNT_dec(mg->mg_obj); | |
3341 | mg->mg_flags |= MGf_REFCOUNTED; | |
3342 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3343 | } | |
3344 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3345 | break; | |
79072805 | 3346 | case '0': |
e2975953 | 3347 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3348 | S_set_dollarzero(aTHX_ sv); |
e2975953 | 3349 | UNLOCK_DOLLARZERO_MUTEX; |
79072805 LW |
3350 | break; |
3351 | } | |
3352 | return 0; | |
3353 | } | |
3354 | ||
ea81552b | 3355 | /* |
3f620621 | 3356 | =for apidoc_section $signals |
ea81552b KW |
3357 | =for apidoc whichsig |
3358 | =for apidoc_item whichsig_pv | |
3359 | =for apidoc_item whichsig_pvn | |
3360 | =for apidoc_item whichsig_sv | |
3361 | ||
3362 | These all convert a signal name into its corresponding signal number; | |
3363 | returning -1 if no corresponding number was found. | |
3364 | ||
3365 | They differ only in the source of the signal name: | |
3366 | ||
3367 | C<whichsig_pv> takes the name from the C<NUL>-terminated string starting at | |
3368 | C<sig>. | |
3369 | ||
3370 | C<whichsig> is merely a different spelling, a synonym, of C<whichsig_pv>. | |
3371 | ||
3372 | C<whichsig_pvn> takes the name from the string starting at C<sig>, with length | |
3373 | C<len> bytes. | |
3374 | ||
3375 | C<whichsig_sv> takes the name from the PV stored in the SV C<sigsv>. | |
3376 | ||
3377 | =cut | |
3378 | */ | |
3379 | ||
79072805 | 3380 | I32 |
84c7b88c BF |
3381 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3382 | { | |
3383 | const char *sigpv; | |
3384 | STRLEN siglen; | |
3385 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3386 | sigpv = SvPV_const(sigsv, siglen); |
3387 | return whichsig_pvn(sigpv, siglen); | |
3388 | } | |
3389 | ||
3390 | I32 | |
3391 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3392 | { | |
3393 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3394 | return whichsig_pvn(sig, strlen(sig)); |
3395 | } | |
3396 | ||
3397 | I32 | |
3398 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3399 | { |
eb578fdb | 3400 | char* const* sigv; |
7918f24d | 3401 | |
84c7b88c | 3402 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3403 | PERL_UNUSED_CONTEXT; |
79072805 | 3404 | |
aadb217d | 3405 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
84c7b88c | 3406 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
aadb217d | 3407 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; |
79072805 | 3408 | #ifdef SIGCLD |
84c7b88c | 3409 | if (memEQs(sig, len, "CHLD")) |
79072805 LW |
3410 | return SIGCLD; |
3411 | #endif | |
3412 | #ifdef SIGCHLD | |
84c7b88c | 3413 | if (memEQs(sig, len, "CLD")) |
79072805 LW |
3414 | return SIGCHLD; |
3415 | #endif | |
7f1236c0 | 3416 | return -1; |
79072805 LW |
3417 | } |
3418 | ||
dc37125b DM |
3419 | |
3420 | /* Perl_sighandler(), Perl_sighandler1(), Perl_sighandler3(): | |
3421 | * these three function are intended to be called by the OS as 'C' level | |
3422 | * signal handler functions in the case where unsafe signals are being | |
3423 | * used - i.e. they immediately invoke Perl_perly_sighandler() to call the | |
3424 | * perl-level sighandler, rather than deferring. | |
3425 | * In fact, the core itself will normally use Perl_csighandler as the | |
3426 | * OS-level handler; that function will then decide whether to queue the | |
3427 | * signal or call Perl_sighandler / Perl_perly_sighandler itself. So these | |
3428 | * functions are more useful for e.g. POSIX.xs when it wants explicit | |
3429 | * control of what's happening. | |
3430 | */ | |
3431 | ||
3432 | ||
5e7940ce | 3433 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b DM |
3434 | |
3435 | Signal_t | |
e7124897 | 3436 | Perl_sighandler(int sig, Siginfo_t *sip, void *uap) |
8a5e470b DM |
3437 | { |
3438 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3439 | } | |
3440 | ||
1e82f5a6 | 3441 | #else |
8a5e470b DM |
3442 | |
3443 | Signal_t | |
1e82f5a6 | 3444 | Perl_sighandler(int sig) |
8a5e470b DM |
3445 | { |
3446 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3447 | } | |
3448 | ||
1e82f5a6 | 3449 | #endif |
8a5e470b | 3450 | |
dc37125b DM |
3451 | Signal_t |
3452 | Perl_sighandler1(int sig) | |
3453 | { | |
3454 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3455 | } | |
3456 | ||
3457 | Signal_t | |
3458 | Perl_sighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
3459 | { | |
3460 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3461 | } | |
3462 | ||
3463 | ||
8a5e470b DM |
3464 | /* Invoke the perl-level signal handler. This function is called either |
3465 | * directly from one of the C-level signals handlers (Perl_sighandler or | |
3466 | * Perl_csighandler), or for safe signals, later from | |
3467 | * Perl_despatch_signals() at a suitable safe point during execution. | |
3468 | * | |
3469 | * 'safe' is a boolean indicating the latter call path. | |
3470 | */ | |
3471 | ||
3472 | Signal_t | |
3473 | Perl_perly_sighandler(int sig, Siginfo_t *sip PERL_UNUSED_DECL, | |
3474 | void *uap PERL_UNUSED_DECL, bool safe) | |
79072805 | 3475 | { |
1018e26f NIS |
3476 | #ifdef PERL_GET_SIG_CONTEXT |
3477 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3478 | #else |
cea2e8a9 | 3479 | dTHX; |
71d280e3 | 3480 | #endif |
79072805 | 3481 | dSP; |
a0714e2c SS |
3482 | GV *gv = NULL; |
3483 | SV *sv = NULL; | |
8772537c | 3484 | SV * const tSv = PL_Sv; |
601f1833 | 3485 | CV *cv = NULL; |
533c011a | 3486 | OP *myop = PL_op; |
84902520 | 3487 | U32 flags = 0; |
8772537c | 3488 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3489 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3490 | SV *errsv_save = NULL; |
71d280e3 | 3491 | |
84902520 | 3492 | |
727405f8 | 3493 | if (!PL_psig_ptr[sig]) { |
99ef548b | 3494 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
727405f8 NIS |
3495 | PL_sig_name[sig]); |
3496 | exit(sig); | |
3497 | } | |
ff0cee69 | 3498 | |
a0d63a7b DM |
3499 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3500 | /* Max number of items pushed there is 3*n or 4. We cannot fix | |
3501 | infinity, so we fix 4 (in fact 5): */ | |
3502 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3503 | flags |= 1; | |
3504 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3505 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3506 | } | |
84902520 | 3507 | } |
84902520 | 3508 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3509 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
8772537c AL |
3510 | || SvTYPE(cv) != SVt_PVCV) { |
3511 | HV *st; | |
f2c0649b | 3512 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); |
8772537c | 3513 | } |
84902520 | 3514 | |
a0d0e21e | 3515 | if (!cv || !CvROOT(cv)) { |
07c325bb | 3516 | const HEK * const hek = gv |
1d6bb9ae FC |
3517 | ? GvENAME_HEK(gv) |
3518 | : cv && CvNAMED(cv) | |
3519 | ? CvNAME_HEK(cv) | |
07c325bb FC |
3520 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; |
3521 | if (hek) | |
3522 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
147e3846 | 3523 | "SIG%s handler \"%" HEKf "\" not defined.\n", |
ac892e4a | 3524 | PL_sig_name[sig], HEKfARG(hek)); |
07c325bb FC |
3525 | /* diag_listed_as: SIG%s handler "%s" not defined */ |
3526 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3527 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3528 | PL_sig_name[sig]); | |
00d579c5 | 3529 | goto cleanup; |
79072805 LW |
3530 | } |
3531 | ||
0c4d3b5e DM |
3532 | sv = PL_psig_name[sig] |
3533 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) | |
3534 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3535 | flags |= 8; |
0c4d3b5e DM |
3536 | SAVEFREESV(sv); |
3537 | ||
a0d63a7b DM |
3538 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3539 | /* make sure our assumption about the size of the SAVEs are correct: | |
3540 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3541 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
3542 | } | |
e336de0d | 3543 | |
e788e7d3 | 3544 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3545 | PUSHMARK(SP); |
79072805 | 3546 | PUSHs(sv); |
dc43527e | 3547 | |
8aad04aa JH |
3548 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3549 | { | |
3550 | struct sigaction oact; | |
3551 | ||
fff75fa7 | 3552 | if (sip && sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { |
dc43527e DM |
3553 | HV *sih = newHV(); |
3554 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); | |
3555 | /* The siginfo fields signo, code, errno, pid, uid, | |
3556 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
3557 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); | |
3558 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
3559 | # ifdef HAS_SIGINFO_SI_ERRNO | |
3560 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3561 | # endif | |
3562 | # ifdef HAS_SIGINFO_SI_STATUS | |
3563 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3564 | # endif | |
3565 | # ifdef HAS_SIGINFO_SI_UID | |
3566 | { | |
3567 | SV *uid = newSV(0); | |
3568 | sv_setuid(uid, sip->si_uid); | |
3569 | (void)hv_stores(sih, "uid", uid); | |
3570 | } | |
3571 | # endif | |
3572 | # ifdef HAS_SIGINFO_SI_PID | |
3573 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3574 | # endif | |
3575 | # ifdef HAS_SIGINFO_SI_ADDR | |
3576 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3577 | # endif | |
3578 | # ifdef HAS_SIGINFO_SI_BAND | |
3579 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
3580 | # endif | |
3581 | EXTEND(SP, 2); | |
3582 | PUSHs(rv); | |
3583 | mPUSHp((char *)sip, sizeof(*sip)); | |
b4552a27 | 3584 | |
8aad04aa JH |
3585 | } |
3586 | } | |
3587 | #endif | |
dc43527e | 3588 | |
79072805 | 3589 | PUTBACK; |
a0d0e21e | 3590 | |
100c03aa JL |
3591 | errsv_save = newSVsv(ERRSV); |
3592 | ||
ad64d0ec | 3593 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3594 | |
d3acc0f7 | 3595 | POPSTACK; |
eed484f9 DD |
3596 | { |
3597 | SV * const errsv = ERRSV; | |
3598 | if (SvTRUE_NN(errsv)) { | |
3599 | SvREFCNT_dec(errsv_save); | |
dc43527e | 3600 | |
c22d665b | 3601 | #ifndef PERL_MICRO |
dc43527e DM |
3602 | /* Handler "died", for example to get out of a restart-able read(). |
3603 | * Before we re-do that on its behalf re-enable the signal which was | |
3604 | * blocked by the system when we entered. | |
3605 | */ | |
3606 | # ifdef HAS_SIGPROCMASK | |
8a5e470b DM |
3607 | if (!safe) { |
3608 | /* safe signals called via dispatch_signals() set up a | |
3609 | * savestack destructor, unblock_sigmask(), to | |
3610 | * automatically unblock the handler at the end. If | |
3611 | * instead we get here directly, we have to do it | |
3612 | * ourselves | |
3613 | */ | |
eed484f9 DD |
3614 | sigset_t set; |
3615 | sigemptyset(&set); | |
3616 | sigaddset(&set,sig); | |
3617 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3618 | } | |
dc43527e | 3619 | # else |
eed484f9 | 3620 | /* Not clear if this will work */ |
8a5e470b DM |
3621 | /* XXX not clear if this should be protected by 'if (safe)' |
3622 | * too */ | |
3623 | ||
eed484f9 DD |
3624 | (void)rsignal(sig, SIG_IGN); |
3625 | (void)rsignal(sig, PL_csighandlerp); | |
dc43527e | 3626 | # endif |
c22d665b | 3627 | #endif /* !PERL_MICRO */ |
dc43527e | 3628 | |
eed484f9 DD |
3629 | die_sv(errsv); |
3630 | } | |
3631 | else { | |
3632 | sv_setsv(errsv, errsv_save); | |
3633 | SvREFCNT_dec(errsv_save); | |
3634 | } | |
100c03aa JL |
3635 | } |
3636 | ||
7b52d656 | 3637 | cleanup: |
0c4d3b5e DM |
3638 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3639 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3640 | if (flags & 8) |
2357bae7 | 3641 | SvREFCNT_dec_NN(sv); |
533c011a | 3642 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3643 | |
3280af22 NIS |
3644 | PL_Sv = tSv; /* Restore global temporaries. */ |
3645 | PL_Xpv = tXpv; | |
53bb94e2 | 3646 | return; |
79072805 | 3647 | } |
4e35701f NIS |
3648 | |
3649 | ||
51371543 | 3650 | static void |
8772537c | 3651 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3652 | { |
8772537c AL |
3653 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3654 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3655 | bool bumped; |
51371543 GS |
3656 | |
3657 | if (!sv) | |
3658 | return; | |
3659 | ||
4bac9ae4 CS |
3660 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
3661 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ | |
a623f893 FC |
3662 | if (mgs->mgs_flags) |
3663 | SvFLAGS(sv) |= mgs->mgs_flags; | |
51371543 GS |
3664 | else |
3665 | mg_magical(sv); | |
51371543 GS |
3666 | } |
3667 | ||
150b625d | 3668 | bumped = mgs->mgs_bumped; |
51371543 GS |
3669 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3670 | ||
3671 | /* If we're still on top of the stack, pop us off. (That condition | |
3672 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3673 | * if it's being called via leave_scope.) | |
3674 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3675 | * may leave alloc gunk on the savestack, and some code | |
3676 | * (e.g. sighandler) doesn't expect that... | |
3677 | */ | |
3678 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3679 | { | |
1be36ce0 NC |
3680 | UV popval = SSPOPUV; |
3681 | assert(popval == SAVEt_DESTRUCTOR_X); | |
51371543 | 3682 | PL_savestack_ix -= 2; |
1be36ce0 NC |
3683 | popval = SSPOPUV; |
3684 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); | |
3685 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3686 | } |
150b625d DM |
3687 | if (bumped) { |
3688 | if (SvREFCNT(sv) == 1) { | |
3689 | /* We hold the last reference to this SV, which implies that the | |
3690 | SV was deleted as a side effect of the routines we called. | |
3691 | So artificially keep it alive a bit longer. | |
3692 | We avoid turning on the TEMP flag, which can cause the SV's | |
3693 | buffer to get stolen (and maybe other stuff). */ | |
150b625d | 3694 | sv_2mortal(sv); |
4bac9ae4 | 3695 | SvTEMP_off(sv); |
8985fe98 | 3696 | } |
150b625d | 3697 | else |
2357bae7 | 3698 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ |
8985fe98 | 3699 | } |
51371543 GS |
3700 | } |
3701 | ||
0c4d3b5e DM |
3702 | /* clean up the mess created by Perl_sighandler(). |
3703 | * Note that this is only called during an exit in a signal handler; | |
3704 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3705 | * skipped over. */ |
0c4d3b5e | 3706 | |
51371543 | 3707 | static void |
8772537c | 3708 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3709 | { |
0c4d3b5e | 3710 | PERL_UNUSED_ARG(p); |
7918f24d | 3711 | |
0c4d3b5e | 3712 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3713 | } |
1018e26f | 3714 | |
66610fdd | 3715 | /* |
3f620621 | 3716 | =for apidoc_section $magic |
b3ca2e83 NC |
3717 | =for apidoc magic_sethint |
3718 | ||
796b6530 | 3719 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3720 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3721 | anything that would need a deep copy. Maybe we should warn if we find a | |
3722 | reference. | |
b3ca2e83 NC |
3723 | |
3724 | =cut | |
3725 | */ | |
3726 | int | |
3727 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3728 | { | |
ad64d0ec | 3729 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
59cd0e26 | 3730 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3731 | |
7918f24d NC |
3732 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3733 | ||
e6e3e454 NC |
3734 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3735 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3736 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3737 | or take other more complex action. */ | |
3738 | ||
5b9c0671 NC |
3739 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3740 | Doing this here saves a lot of doing it manually in perl code (and | |
3741 | forgetting to do it, and consequent subtle errors. */ | |
3742 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 Z |
3743 | CopHINTHASH_set(&PL_compiling, |
3744 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); | |
b34c1a7e | 3745 | magic_sethint_feature(key, NULL, 0, sv, 0); |
b3ca2e83 NC |
3746 | return 0; |
3747 | } | |
3748 | ||
3749 | /* | |
f175cff5 | 3750 | =for apidoc magic_clearhint |
b3ca2e83 | 3751 | |
796b6530 | 3752 | Triggered by a delete from C<%^H>, records the key to |
c28fe1ec | 3753 | C<PL_compiling.cop_hints_hash>. |
b3ca2e83 NC |
3754 | |
3755 | =cut | |
3756 | */ | |
3757 | int | |
3758 | Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg) | |
3759 | { | |
7918f24d | 3760 | PERL_ARGS_ASSERT_MAGIC_CLEARHINT; |
f5a63d97 AL |
3761 | PERL_UNUSED_ARG(sv); |
3762 | ||
5b9c0671 | 3763 | PL_hints |= HINT_LOCALIZE_HH; |
20439bc7 | 3764 | CopHINTHASH_set(&PL_compiling, |
e3352591 FC |
3765 | mg->mg_len == HEf_SVKEY |
3766 | ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling), | |
3767 | MUTABLE_SV(mg->mg_ptr), 0, 0) | |
3768 | : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling), | |
3769 | mg->mg_ptr, mg->mg_len, 0, 0)); | |
b34c1a7e TC |
3770 | if (mg->mg_len == HEf_SVKEY) |
3771 | magic_sethint_feature(MUTABLE_SV(mg->mg_ptr), NULL, 0, NULL, FALSE); | |
3772 | else | |
3773 | magic_sethint_feature(NULL, mg->mg_ptr, mg->mg_len, NULL, FALSE); | |
b3ca2e83 NC |
3774 | return 0; |
3775 | } | |
3776 | ||
3777 | /* | |
f747ebd6 Z |
3778 | =for apidoc magic_clearhints |
3779 | ||
796b6530 | 3780 | Triggered by clearing C<%^H>, resets C<PL_compiling.cop_hints_hash>. |
f747ebd6 Z |
3781 | |
3782 | =cut | |
3783 | */ | |
3784 | int | |
3785 | Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg) | |
3786 | { | |
3787 | PERL_ARGS_ASSERT_MAGIC_CLEARHINTS; | |
3788 | PERL_UNUSED_ARG(sv); | |
3789 | PERL_UNUSED_ARG(mg); | |
20439bc7 Z |
3790 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
3791 | CopHINTHASH_set(&PL_compiling, cophh_new_empty()); | |
b34c1a7e | 3792 | CLEARFEATUREBITS(); |
f747ebd6 Z |
3793 | return 0; |
3794 | } | |
3795 | ||
09fb282d FC |
3796 | int |
3797 | Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv, | |
3798 | const char *name, I32 namlen) | |
3799 | { | |
3800 | MAGIC *nmg; | |
3801 | ||
3802 | PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER; | |
4f8dbb2d | 3803 | PERL_UNUSED_ARG(sv); |
09fb282d FC |
3804 | PERL_UNUSED_ARG(name); |
3805 | PERL_UNUSED_ARG(namlen); | |
3806 | ||
3807 | sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0); | |
3808 | nmg = mg_find(nsv, mg->mg_type); | |
316ebaf2 | 3809 | assert(nmg); |
09fb282d FC |
3810 | if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj); |
3811 | nmg->mg_ptr = mg->mg_ptr; | |
3812 | nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj); | |
3813 | nmg->mg_flags |= MGf_REFCOUNTED; | |
3814 | return 1; | |
3815 | } | |
3816 | ||
a6d69523 TC |
3817 | int |
3818 | Perl_magic_setdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3819 | PERL_ARGS_ASSERT_MAGIC_SETDEBUGVAR; | |
3820 | ||
23270f96 DM |
3821 | #if DBVARMG_SINGLE != 0 |
3822 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3823 | #endif | |
3824 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3825 | |
3826 | PL_DBcontrol[mg->mg_private] = SvIV_nomg(sv); | |
3827 | ||
3828 | return 1; | |
3829 | } | |
3830 | ||
3831 | int | |
3832 | Perl_magic_getdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3833 | PERL_ARGS_ASSERT_MAGIC_GETDEBUGVAR; | |
3834 | ||
23270f96 DM |
3835 | #if DBVARMG_SINGLE != 0 |
3836 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3837 | #endif | |
3838 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3839 | sv_setiv(sv, PL_DBcontrol[mg->mg_private]); |
3840 | ||
3841 | return 0; | |
3842 | } | |
3843 | ||
f747ebd6 | 3844 | /* |
14d04a33 | 3845 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3846 | */ |