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 DM |
556 | |
557 | if (mg->mg_type == PERL_MAGIC_collxfrm && mg->mg_len >= 0) | |
558 | /* collate magic uses string len not buffer len, so | |
559 | * free even with mg_len == 0 */ | |
560 | Safefree(mg->mg_ptr); | |
561 | else if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) { | |
d9088386 Z |
562 | if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8) |
563 | Safefree(mg->mg_ptr); | |
564 | else if (mg->mg_len == HEf_SVKEY) | |
565 | SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr)); | |
566 | } | |
44955e7d | 567 | |
d9088386 Z |
568 | if (mg->mg_flags & MGf_REFCOUNTED) |
569 | SvREFCNT_dec(mg->mg_obj); | |
570 | Safefree(mg); | |
571 | } | |
572 | ||
0cbee0a4 | 573 | /* |
954c1994 GS |
574 | =for apidoc mg_free |
575 | ||
fbe13c60 | 576 | Free any magic storage used by the SV. See C<L</sv_magic>>. |
954c1994 GS |
577 | |
578 | =cut | |
579 | */ | |
580 | ||
79072805 | 581 | int |
864dbfa3 | 582 | Perl_mg_free(pTHX_ SV *sv) |
79072805 LW |
583 | { |
584 | MAGIC* mg; | |
585 | MAGIC* moremagic; | |
7918f24d NC |
586 | |
587 | PERL_ARGS_ASSERT_MG_FREE; | |
588 | ||
79072805 | 589 | for (mg = SvMAGIC(sv); mg; mg = moremagic) { |
79072805 | 590 | moremagic = mg->mg_moremagic; |
d9088386 | 591 | mg_free_struct(sv, mg); |
c826f41b | 592 | SvMAGIC_set(sv, moremagic); |
79072805 | 593 | } |
b162af07 | 594 | SvMAGIC_set(sv, NULL); |
68f8932e | 595 | SvMAGICAL_off(sv); |
79072805 LW |
596 | return 0; |
597 | } | |
598 | ||
d9088386 | 599 | /* |
44170c9a | 600 | =for apidoc mg_free_type |
d9088386 | 601 | |
2d7f6611 | 602 | Remove any magic of type C<how> from the SV C<sv>. See L</sv_magic>. |
d9088386 Z |
603 | |
604 | =cut | |
605 | */ | |
606 | ||
607 | void | |
608 | Perl_mg_free_type(pTHX_ SV *sv, int how) | |
609 | { | |
610 | MAGIC *mg, *prevmg, *moremg; | |
611 | PERL_ARGS_ASSERT_MG_FREE_TYPE; | |
612 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
d9088386 Z |
613 | moremg = mg->mg_moremagic; |
614 | if (mg->mg_type == how) { | |
19742f39 | 615 | MAGIC *newhead; |
d9088386 Z |
616 | /* temporarily move to the head of the magic chain, in case |
617 | custom free code relies on this historical aspect of mg_free */ | |
618 | if (prevmg) { | |
619 | prevmg->mg_moremagic = moremg; | |
620 | mg->mg_moremagic = SvMAGIC(sv); | |
621 | SvMAGIC_set(sv, mg); | |
622 | } | |
623 | newhead = mg->mg_moremagic; | |
624 | mg_free_struct(sv, mg); | |
625 | SvMAGIC_set(sv, newhead); | |
626 | mg = prevmg; | |
627 | } | |
628 | } | |
629 | mg_magical(sv); | |
630 | } | |
631 | ||
e0d4aead TC |
632 | /* |
633 | =for apidoc mg_freeext | |
634 | ||
635 | Remove any magic of type C<how> using virtual table C<vtbl> from the | |
636 | SV C<sv>. See L</sv_magic>. | |
637 | ||
638 | C<mg_freeext(sv, how, NULL)> is equivalent to C<mg_free_type(sv, how)>. | |
639 | ||
640 | =cut | |
641 | */ | |
642 | ||
643 | void | |
644 | Perl_mg_freeext(pTHX_ SV *sv, int how, const MGVTBL *vtbl) | |
645 | { | |
646 | MAGIC *mg, *prevmg, *moremg; | |
647 | PERL_ARGS_ASSERT_MG_FREEEXT; | |
648 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
649 | MAGIC *newhead; | |
650 | moremg = mg->mg_moremagic; | |
651 | if (mg->mg_type == how && (vtbl == NULL || mg->mg_virtual == vtbl)) { | |
652 | /* temporarily move to the head of the magic chain, in case | |
653 | custom free code relies on this historical aspect of mg_free */ | |
654 | if (prevmg) { | |
655 | prevmg->mg_moremagic = moremg; | |
656 | mg->mg_moremagic = SvMAGIC(sv); | |
657 | SvMAGIC_set(sv, mg); | |
658 | } | |
659 | newhead = mg->mg_moremagic; | |
660 | mg_free_struct(sv, mg); | |
661 | SvMAGIC_set(sv, newhead); | |
662 | mg = prevmg; | |
663 | } | |
664 | } | |
665 | mg_magical(sv); | |
666 | } | |
667 | ||
79072805 | 668 | #include <signal.h> |
79072805 | 669 | |
942e002e | 670 | U32 |
864dbfa3 | 671 | Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 672 | { |
8772537c | 673 | PERL_UNUSED_ARG(sv); |
6cef1e77 | 674 | |
7918f24d NC |
675 | PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT; |
676 | ||
0bd48802 | 677 | if (PL_curpm) { |
27deb0cf | 678 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 679 | if (rx) { |
fa531f32 DM |
680 | const SSize_t n = (SSize_t)mg->mg_obj; |
681 | if (n == '+') { /* @+ */ | |
a678b0e4 | 682 | /* return the number possible */ |
07bc277f | 683 | return RX_NPARENS(rx); |
27deb0cf | 684 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
07bc277f | 685 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 YO |
686 | |
687 | /* return the last filled */ | |
f46c4081 | 688 | while ( paren >= 0 |
07bc277f NC |
689 | && (RX_OFFS(rx)[paren].start == -1 |
690 | || RX_OFFS(rx)[paren].end == -1) ) | |
f46c4081 | 691 | paren--; |
fa531f32 | 692 | if (n == '-') { |
27deb0cf YO |
693 | /* @- */ |
694 | return (U32)paren; | |
695 | } else { | |
696 | /* @^CAPTURE @{^CAPTURE} */ | |
697 | return paren >= 0 ? (U32)(paren-1) : (U32)-1; | |
698 | } | |
699 | } | |
0bd48802 | 700 | } |
8f580fb8 | 701 | } |
ac27b0f5 | 702 | |
942e002e | 703 | return (U32)-1; |
6cef1e77 IZ |
704 | } |
705 | ||
6502e081 DM |
706 | /* @-, @+ */ |
707 | ||
6cef1e77 | 708 | int |
864dbfa3 | 709 | Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 710 | { |
7918f24d NC |
711 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET; |
712 | ||
0bd48802 | 713 | if (PL_curpm) { |
27deb0cf | 714 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 715 | if (rx) { |
fa531f32 | 716 | const SSize_t n = (SSize_t)mg->mg_obj; |
27deb0cf YO |
717 | /* @{^CAPTURE} does not contain $&, so we need to increment by 1 */ |
718 | const I32 paren = mg->mg_len | |
fa531f32 | 719 | + (n == '\003' ? 1 : 0); |
a10eae29 FC |
720 | SSize_t s; |
721 | SSize_t t; | |
0bd48802 AL |
722 | if (paren < 0) |
723 | return 0; | |
07bc277f NC |
724 | if (paren <= (I32)RX_NPARENS(rx) && |
725 | (s = RX_OFFS(rx)[paren].start) != -1 && | |
726 | (t = RX_OFFS(rx)[paren].end) != -1) | |
0bd48802 | 727 | { |
a10eae29 | 728 | SSize_t i; |
27deb0cf | 729 | |
fa531f32 | 730 | if (n == '+') /* @+ */ |
0bd48802 | 731 | i = t; |
fa531f32 | 732 | else if (n == '-') /* @- */ |
0bd48802 | 733 | i = s; |
27deb0cf YO |
734 | else { /* @^CAPTURE @{^CAPTURE} */ |
735 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
736 | return 0; | |
737 | } | |
0bd48802 | 738 | |
a10eae29 | 739 | if (RX_MATCH_UTF8(rx)) { |
07bc277f | 740 | const char * const b = RX_SUBBEG(rx); |
0bd48802 | 741 | if (b) |
6502e081 DM |
742 | i = RX_SUBCOFFSET(rx) + |
743 | utf8_length((U8*)b, | |
744 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
0bd48802 | 745 | } |
727405f8 | 746 | |
a10eae29 | 747 | sv_setuv(sv, i); |
232af1f8 | 748 | return 0; |
1aa99e6b | 749 | } |
0bd48802 | 750 | } |
6cef1e77 | 751 | } |
3773545d | 752 | sv_set_undef(sv); |
6cef1e77 IZ |
753 | return 0; |
754 | } | |
755 | ||
6502e081 DM |
756 | /* @-, @+ */ |
757 | ||
e4b89193 | 758 | int |
a29d06ed MG |
759 | Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg) |
760 | { | |
7918f24d | 761 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET; |
dc3bf405 | 762 | PERL_UNUSED_CONTEXT; |
d4c19fe8 AL |
763 | PERL_UNUSED_ARG(sv); |
764 | PERL_UNUSED_ARG(mg); | |
cb077ed2 | 765 | Perl_croak_no_modify(); |
0dbb1585 | 766 | NORETURN_FUNCTION_END; |
a29d06ed MG |
767 | } |
768 | ||
ad3296c6 | 769 | #define SvRTRIM(sv) STMT_START { \ |
eae92ea0 GA |
770 | if (SvPOK(sv)) { \ |
771 | STRLEN len = SvCUR(sv); \ | |
772 | char * const p = SvPVX(sv); \ | |
8e6b4db6 PC |
773 | while (len > 0 && isSPACE(p[len-1])) \ |
774 | --len; \ | |
775 | SvCUR_set(sv, len); \ | |
776 | p[len] = '\0'; \ | |
777 | } \ | |
ad3296c6 SH |
778 | } STMT_END |
779 | ||
8b850bd5 NC |
780 | void |
781 | Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv) | |
782 | { | |
7918f24d NC |
783 | PERL_ARGS_ASSERT_EMULATE_COP_IO; |
784 | ||
8b850bd5 | 785 | if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT))) |
e03e82a0 | 786 | sv_set_undef(sv); |
8b850bd5 | 787 | else { |
b2aed775 | 788 | SvPVCLEAR(sv); |
8b850bd5 NC |
789 | SvUTF8_off(sv); |
790 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
20439bc7 | 791 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); |
8b850bd5 NC |
792 | assert(value); |
793 | sv_catsv(sv, value); | |
794 | } | |
795 | sv_catpvs(sv, "\0"); | |
796 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
20439bc7 | 797 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); |
8b850bd5 NC |
798 | assert(value); |
799 | sv_catsv(sv, value); | |
800 | } | |
801 | } | |
802 | } | |
803 | ||
d9fe7d23 KW |
804 | STATIC void |
805 | S_fixup_errno_string(pTHX_ SV* sv) | |
806 | { | |
807 | /* Do what is necessary to fixup the non-empty string in 'sv' for return to | |
808 | * Perl space. */ | |
809 | ||
810 | PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING; | |
811 | ||
812 | assert(SvOK(sv)); | |
b35e4f8b KW |
813 | |
814 | if(strEQ(SvPVX(sv), "")) { | |
815 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); | |
816 | } | |
817 | else { | |
d9fe7d23 | 818 | |
d3c0b317 KW |
819 | /* In some locales the error string may come back as UTF-8, in which |
820 | * case we should turn on that flag. This didn't use to happen, and to | |
5320b60d KW |
821 | * avoid as many possible backward compatibility issues as possible, we |
822 | * don't turn on the flag unless we have to. So the flag stays off for | |
9f10db87 | 823 | * an entirely invariant string. We assume that if the string looks |
fab19207 KW |
824 | * like UTF-8 in a single script, it really is UTF-8: "text in any |
825 | * other encoding that uses bytes with the high bit set is extremely | |
826 | * unlikely to pass a UTF-8 validity test" | |
9f10db87 KW |
827 | * (http://en.wikipedia.org/wiki/Charset_detection). There is a |
828 | * potential that we will get it wrong however, especially on short | |
a8f4b0c6 | 829 | * error message text, so do an additional check. */ |
027a0d26 KW |
830 | if ( ! IN_BYTES /* respect 'use bytes' */ |
831 | && is_utf8_non_invariant_string((U8*) SvPVX_const(sv), SvCUR(sv)) | |
a8f4b0c6 KW |
832 | |
833 | #ifdef USE_LOCALE_MESSAGES | |
834 | ||
61520eee | 835 | && _is_cur_LC_category_utf8(LC_MESSAGES) |
a8f4b0c6 | 836 | |
fab19207 KW |
837 | #else /* If can't check directly, at least can see if script is consistent, |
838 | under UTF-8, which gives us an extra measure of confidence. */ | |
839 | ||
840 | && isSCRIPT_RUN((const U8 *) SvPVX_const(sv), (U8 *) SvEND(sv), | |
8c53dada | 841 | TRUE) /* Means assume UTF-8 */ |
a8f4b0c6 KW |
842 | #endif |
843 | ||
844 | ) { | |
d3c0b317 KW |
845 | SvUTF8_on(sv); |
846 | } | |
b35e4f8b | 847 | } |
d9fe7d23 KW |
848 | } |
849 | ||
658db622 | 850 | /* |
51b56f5c | 851 | =for apidoc_section Errno |
44170c9a | 852 | =for apidoc sv_string_from_errnum |
658db622 Z |
853 | |
854 | Generates the message string describing an OS error and returns it as | |
855 | an SV. C<errnum> must be a value that C<errno> could take, identifying | |
856 | the type of error. | |
857 | ||
858 | If C<tgtsv> is non-null then the string will be written into that SV | |
859 | (overwriting existing content) and it will be returned. If C<tgtsv> | |
860 | is a null pointer then the string will be written into a new mortal SV | |
861 | which will be returned. | |
862 | ||
863 | The message will be taken from whatever locale would be used by C<$!>, | |
864 | and will be encoded in the SV in whatever manner would be used by C<$!>. | |
865 | The details of this process are subject to future change. Currently, | |
866 | the message is taken from the C locale by default (usually producing an | |
867 | English message), and from the currently selected locale when in the scope | |
868 | of the C<use locale> pragma. A heuristic attempt is made to decode the | |
869 | message from the locale's character encoding, but it will only be decoded | |
870 | as either UTF-8 or ISO-8859-1. It is always correctly decoded in a UTF-8 | |
871 | locale, usually in an ISO-8859-1 locale, and never in any other locale. | |
872 | ||
873 | The SV is always returned containing an actual string, and with no other | |
874 | OK bits set. Unlike C<$!>, a message is even yielded for C<errnum> zero | |
875 | (meaning success), and if no useful message is available then a useless | |
876 | string (currently empty) is returned. | |
877 | ||
878 | =cut | |
879 | */ | |
880 | ||
881 | SV * | |
882 | Perl_sv_string_from_errnum(pTHX_ int errnum, SV *tgtsv) | |
883 | { | |
884 | char const *errstr; | |
885 | if(!tgtsv) | |
886 | tgtsv = sv_newmortal(); | |
887 | errstr = my_strerror(errnum); | |
888 | if(errstr) { | |
889 | sv_setpv(tgtsv, errstr); | |
890 | fixup_errno_string(tgtsv); | |
891 | } else { | |
892 | SvPVCLEAR(tgtsv); | |
893 | } | |
894 | return tgtsv; | |
895 | } | |
896 | ||
25bbd826 CB |
897 | #ifdef VMS |
898 | #include <descrip.h> | |
899 | #include <starlet.h> | |
900 | #endif | |
901 | ||
79072805 | 902 | int |
864dbfa3 | 903 | Perl_magic_get(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 904 | { |
eb578fdb KW |
905 | I32 paren; |
906 | const char *s = NULL; | |
907 | REGEXP *rx; | |
823a54a3 | 908 | const char * const remaining = mg->mg_ptr + 1; |
e91d8259 | 909 | char nextchar; |
79072805 | 910 | |
7918f24d NC |
911 | PERL_ARGS_ASSERT_MAGIC_GET; |
912 | ||
e91d8259 | 913 | if (!mg->mg_ptr) { |
e91d8259 | 914 | paren = mg->mg_len; |
e91d8259 | 915 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
a6d0b1b5 | 916 | do_numbuf_fetch: |
e91d8259 | 917 | CALLREG_NUMBUF_FETCH(rx,paren,sv); |
e91d8259 | 918 | } |
e03e82a0 DM |
919 | else |
920 | goto set_undef; | |
e91d8259 NC |
921 | return 0; |
922 | } | |
923 | ||
924 | nextchar = *remaining; | |
79072805 | 925 | switch (*mg->mg_ptr) { |
748a9306 | 926 | case '\001': /* ^A */ |
f2da823f | 927 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
e03e82a0 DM |
928 | else |
929 | sv_set_undef(sv); | |
125b9982 NT |
930 | if (SvTAINTED(PL_bodytarget)) |
931 | SvTAINTED_on(sv); | |
748a9306 | 932 | break; |
e5218da5 | 933 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
823a54a3 | 934 | if (nextchar == '\0') { |
e5218da5 GA |
935 | sv_setiv(sv, (IV)PL_minus_c); |
936 | } | |
823a54a3 | 937 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { |
e5218da5 GA |
938 | sv_setiv(sv, (IV)STATUS_NATIVE); |
939 | } | |
49460fe6 NIS |
940 | break; |
941 | ||
79072805 | 942 | case '\004': /* ^D */ |
aea4f609 | 943 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
79072805 | 944 | break; |
28f23441 | 945 | case '\005': /* ^E */ |
6c6eab55 KW |
946 | if (nextchar != '\0') { |
947 | if (strEQ(remaining, "NCODING")) | |
3773545d | 948 | sv_set_undef(sv); |
4f4ff3a7 | 949 | break; |
6c6eab55 | 950 | } |
4f4ff3a7 KW |
951 | |
952 | #if defined(VMS) || defined(OS2) || defined(WIN32) | |
953 | # if defined(VMS) | |
2a99ff86 KW |
954 | { |
955 | char msg[255]; | |
956 | $DESCRIPTOR(msgdsc,msg); | |
957 | sv_setnv(sv,(NV) vaxc$errno); | |
958 | if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) | |
959 | sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); | |
960 | else | |
b2aed775 | 961 | SvPVCLEAR(sv); |
2a99ff86 | 962 | } |
4b645107 | 963 | #elif defined(OS2) |
2a99ff86 KW |
964 | if (!(_emx_env & 0x200)) { /* Under DOS */ |
965 | sv_setnv(sv, (NV)errno); | |
2c6ee1a7 | 966 | sv_setpv(sv, errno ? my_strerror(errno) : ""); |
2a99ff86 KW |
967 | } else { |
968 | if (errno != errno_isOS2) { | |
969 | const int tmp = _syserrno(); | |
970 | if (tmp) /* 2nd call to _syserrno() makes it 0 */ | |
971 | Perl_rc = tmp; | |
972 | } | |
973 | sv_setnv(sv, (NV)Perl_rc); | |
974 | sv_setpv(sv, os2error(Perl_rc)); | |
975 | } | |
1534c6f5 | 976 | if (SvOK(sv) && strNE(SvPVX(sv), "")) { |
99461a73 KW |
977 | fixup_errno_string(sv); |
978 | } | |
4f4ff3a7 | 979 | # elif defined(WIN32) |
2a99ff86 KW |
980 | { |
981 | const DWORD dwErr = GetLastError(); | |
982 | sv_setnv(sv, (NV)dwErr); | |
983 | if (dwErr) { | |
984 | PerlProc_GetOSError(sv, dwErr); | |
2efab60d | 985 | fixup_errno_string(sv); |
2a99ff86 KW |
986 | } |
987 | else | |
b2aed775 | 988 | SvPVCLEAR(sv); |
2a99ff86 KW |
989 | SetLastError(dwErr); |
990 | } | |
4f4ff3a7 KW |
991 | # else |
992 | # error Missing code for platform | |
993 | # endif | |
2a99ff86 KW |
994 | SvRTRIM(sv); |
995 | SvNOK_on(sv); /* what a wonderful hack! */ | |
996 | break; | |
4f4ff3a7 KW |
997 | #endif /* End of platforms with special handling for $^E; others just fall |
998 | through to $! */ | |
2165bd23 | 999 | /* FALLTHROUGH */ |
46f3e16c KW |
1000 | |
1001 | case '!': | |
1002 | { | |
5f1b979d | 1003 | dSAVE_ERRNO; |
46f3e16c | 1004 | #ifdef VMS |
5f1b979d | 1005 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno)); |
46f3e16c | 1006 | #else |
5f1b979d | 1007 | sv_setnv(sv, (NV)errno); |
46f3e16c KW |
1008 | #endif |
1009 | #ifdef OS2 | |
5f1b979d KW |
1010 | if (errno == errno_isOS2 || errno == errno_isOS2_set) |
1011 | sv_setpv(sv, os2error(Perl_rc)); | |
1012 | else | |
46f3e16c | 1013 | #endif |
5f1b979d | 1014 | if (! errno) { |
b2aed775 | 1015 | SvPVCLEAR(sv); |
46f3e16c | 1016 | } |
5f1b979d | 1017 | else { |
658db622 Z |
1018 | sv_string_from_errnum(errno, sv); |
1019 | /* If no useful string is available, don't | |
1020 | * claim to have a string part. The SvNOK_on() | |
5f1b979d | 1021 | * below will cause just the number part to be valid */ |
658db622 Z |
1022 | if (!SvCUR(sv)) |
1023 | SvPOK_off(sv); | |
5f1b979d KW |
1024 | } |
1025 | RESTORE_ERRNO; | |
46f3e16c KW |
1026 | } |
1027 | ||
1028 | SvRTRIM(sv); | |
1029 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1030 | break; | |
1031 | ||
79072805 | 1032 | case '\006': /* ^F */ |
9f601cf3 TC |
1033 | if (nextchar == '\0') { |
1034 | sv_setiv(sv, (IV)PL_maxsysfd); | |
1035 | } | |
79072805 | 1036 | break; |
9ebf26ad FR |
1037 | case '\007': /* ^GLOBAL_PHASE */ |
1038 | if (strEQ(remaining, "LOBAL_PHASE")) { | |
1039 | sv_setpvn(sv, PL_phase_names[PL_phase], | |
1040 | strlen(PL_phase_names[PL_phase])); | |
1041 | } | |
1042 | break; | |
a0d0e21e | 1043 | case '\010': /* ^H */ |
5d382c25 | 1044 | sv_setuv(sv, PL_hints); |
a0d0e21e | 1045 | break; |
9d116dd7 | 1046 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
120f7abe | 1047 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
79072805 | 1048 | break; |
8561ea1d FC |
1049 | case '\014': /* ^LAST_FH */ |
1050 | if (strEQ(remaining, "AST_FH")) { | |
745e740c | 1051 | if (PL_last_in_gv && (SV*)PL_last_in_gv != &PL_sv_undef) { |
8561ea1d FC |
1052 | assert(isGV_with_GP(PL_last_in_gv)); |
1053 | SV_CHECK_THINKFIRST_COW_DROP(sv); | |
1054 | prepare_SV_for_RV(sv); | |
1055 | SvOK_off(sv); | |
1056 | SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv)); | |
1057 | SvROK_on(sv); | |
1058 | sv_rvweaken(sv); | |
1059 | } | |
3773545d DM |
1060 | else |
1061 | sv_set_undef(sv); | |
8561ea1d FC |
1062 | } |
1063 | break; | |
ac27b0f5 | 1064 | case '\017': /* ^O & ^OPEN */ |
823a54a3 | 1065 | if (nextchar == '\0') { |
ac27b0f5 | 1066 | sv_setpv(sv, PL_osname); |
3511154c DM |
1067 | SvTAINTED_off(sv); |
1068 | } | |
823a54a3 | 1069 | else if (strEQ(remaining, "PEN")) { |
8b850bd5 | 1070 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); |
ac27b0f5 | 1071 | } |
28f23441 | 1072 | break; |
9ebf26ad | 1073 | case '\020': |
a6d0b1b5 | 1074 | sv_setiv(sv, (IV)PL_perldb); |
79072805 | 1075 | break; |
fb73857a | 1076 | case '\023': /* ^S */ |
f512d242 | 1077 | if (nextchar == '\0') { |
bc177e6b | 1078 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) |
0c34ef67 | 1079 | SvOK_off(sv); |
3280af22 | 1080 | else if (PL_in_eval) |
6dc8a9e4 | 1081 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); |
a4268c0a AMS |
1082 | else |
1083 | sv_setiv(sv, 0); | |
d58bf5aa | 1084 | } |
f512d242 KW |
1085 | else if (strEQ(remaining, "AFE_LOCALES")) { |
1086 | ||
1087 | #if ! defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE) | |
1088 | ||
1089 | sv_setuv(sv, (UV) 1); | |
1090 | ||
1091 | #else | |
1092 | sv_setuv(sv, (UV) 0); | |
1093 | ||
1094 | #endif | |
1095 | ||
1096 | } | |
fb73857a | 1097 | break; |
79072805 | 1098 | case '\024': /* ^T */ |
823a54a3 | 1099 | if (nextchar == '\0') { |
88e89b8a | 1100 | #ifdef BIG_TIME |
7c36658b | 1101 | sv_setnv(sv, PL_basetime); |
88e89b8a | 1102 | #else |
7c36658b | 1103 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 1104 | #endif |
7c36658b | 1105 | } |
823a54a3 | 1106 | else if (strEQ(remaining, "AINT")) |
284167a5 S |
1107 | sv_setiv(sv, TAINTING_get |
1108 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) | |
9aa05f58 | 1109 | : 0); |
7c36658b | 1110 | break; |
e07ea26a | 1111 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
823a54a3 | 1112 | if (strEQ(remaining, "NICODE")) |
a05d7ebb | 1113 | sv_setuv(sv, (UV) PL_unicode); |
823a54a3 | 1114 | else if (strEQ(remaining, "TF8LOCALE")) |
7cebcbc0 | 1115 | sv_setuv(sv, (UV) PL_utf8locale); |
e07ea26a NC |
1116 | else if (strEQ(remaining, "TF8CACHE")) |
1117 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
1118 | break; |
1119 | case '\027': /* ^W & $^WARNING_BITS */ | |
823a54a3 | 1120 | if (nextchar == '\0') |
8298454c | 1121 | sv_setiv(sv, (IV)cBOOL(PL_dowarn & G_WARN_ON)); |
823a54a3 | 1122 | else if (strEQ(remaining, "ARNING_BITS")) { |
013b78e8 | 1123 | if (PL_compiling.cop_warnings == pWARN_NONE) { |
4438c4b7 | 1124 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; |
013b78e8 RGS |
1125 | } |
1126 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
e03e82a0 | 1127 | goto set_undef; |
013b78e8 | 1128 | } |
d3a7d8c7 | 1129 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
006c1a1d | 1130 | sv_setpvn(sv, WARN_ALLstring, WARNsize); |
ac27b0f5 | 1131 | } |
4438c4b7 | 1132 | else { |
72dc9ed5 NC |
1133 | sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1), |
1134 | *PL_compiling.cop_warnings); | |
ac27b0f5 | 1135 | } |
4438c4b7 | 1136 | } |
8ca2a5d6 DD |
1137 | #ifdef WIN32 |
1138 | else if (strEQ(remaining, "IN32_SLOPPY_STAT")) { | |
1139 | sv_setiv(sv, w32_sloppystat); | |
1140 | } | |
1141 | #endif | |
79072805 | 1142 | break; |
79072805 | 1143 | case '+': |
aaa362c4 | 1144 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
2c7b5d76 DM |
1145 | paren = RX_LASTPAREN(rx); |
1146 | if (paren) | |
1147 | goto do_numbuf_fetch; | |
79072805 | 1148 | } |
e03e82a0 | 1149 | goto set_undef; |
a01268b5 JH |
1150 | case '\016': /* ^N */ |
1151 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { | |
2c7b5d76 DM |
1152 | paren = RX_LASTCLOSEPAREN(rx); |
1153 | if (paren) | |
1154 | goto do_numbuf_fetch; | |
a01268b5 | 1155 | } |
e03e82a0 | 1156 | goto set_undef; |
79072805 | 1157 | case '.': |
3280af22 | 1158 | if (GvIO(PL_last_in_gv)) { |
357c8808 | 1159 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); |
79072805 | 1160 | } |
79072805 LW |
1161 | break; |
1162 | case '?': | |
809a5acc | 1163 | { |
809a5acc | 1164 | sv_setiv(sv, (IV)STATUS_CURRENT); |
ff0cee69 | 1165 | #ifdef COMPLEX_STATUS |
41cb7b2b | 1166 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
1167 | LvTARGOFF(sv) = PL_statusvalue; |
1168 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1169 | #endif |
809a5acc | 1170 | } |
79072805 LW |
1171 | break; |
1172 | case '^': | |
acbe1b9d | 1173 | if (GvIOp(PL_defoutgv)) |
099be4f1 | 1174 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); |
79072805 LW |
1175 | if (s) |
1176 | sv_setpv(sv,s); | |
1177 | else { | |
3280af22 | 1178 | sv_setpv(sv,GvENAME(PL_defoutgv)); |
cb421d5e | 1179 | sv_catpvs(sv,"_TOP"); |
79072805 LW |
1180 | } |
1181 | break; | |
1182 | case '~': | |
acbe1b9d | 1183 | if (GvIOp(PL_defoutgv)) |
0daa599b | 1184 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); |
79072805 | 1185 | if (!s) |
3280af22 | 1186 | s = GvENAME(PL_defoutgv); |
79072805 LW |
1187 | sv_setpv(sv,s); |
1188 | break; | |
79072805 | 1189 | case '=': |
099be4f1 | 1190 | if (GvIO(PL_defoutgv)) |
0daa599b | 1191 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); |
79072805 LW |
1192 | break; |
1193 | case '-': | |
099be4f1 | 1194 | if (GvIO(PL_defoutgv)) |
0daa599b | 1195 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); |
79072805 LW |
1196 | break; |
1197 | case '%': | |
099be4f1 | 1198 | if (GvIO(PL_defoutgv)) |
0daa599b | 1199 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); |
79072805 | 1200 | break; |
79072805 | 1201 | case ':': |
79072805 LW |
1202 | case '/': |
1203 | break; | |
1204 | case '[': | |
e1dccc0d | 1205 | sv_setiv(sv, 0); |
79072805 LW |
1206 | break; |
1207 | case '|': | |
099be4f1 | 1208 | if (GvIO(PL_defoutgv)) |
0daa599b | 1209 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); |
79072805 | 1210 | break; |
79072805 | 1211 | case '\\': |
b2ce0fda | 1212 | if (PL_ors_sv) |
f28098ff | 1213 | sv_copypv(sv, PL_ors_sv); |
4bac9ae4 | 1214 | else |
e03e82a0 | 1215 | goto set_undef; |
79072805 | 1216 | break; |
0e219455 | 1217 | case '$': /* $$ */ |
9cdac2a2 FC |
1218 | { |
1219 | IV const pid = (IV)PerlProc_getpid(); | |
19db9fb7 | 1220 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { |
9cdac2a2 FC |
1221 | /* never set manually, or at least not since last fork */ |
1222 | sv_setiv(sv, pid); | |
19db9fb7 Z |
1223 | /* never unsafe, even if reading in a tainted expression */ |
1224 | SvTAINTED_off(sv); | |
1225 | } | |
9cdac2a2 FC |
1226 | /* else a value has been assigned manually, so do nothing */ |
1227 | } | |
0e219455 | 1228 | break; |
79072805 | 1229 | case '<': |
dfff4baf | 1230 | sv_setuid(sv, PerlProc_getuid()); |
79072805 LW |
1231 | break; |
1232 | case '>': | |
dfff4baf | 1233 | sv_setuid(sv, PerlProc_geteuid()); |
79072805 LW |
1234 | break; |
1235 | case '(': | |
dfff4baf | 1236 | sv_setgid(sv, PerlProc_getgid()); |
79072805 LW |
1237 | goto add_groups; |
1238 | case ')': | |
dfff4baf | 1239 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1240 | add_groups: |
79072805 | 1241 | #ifdef HAS_GETGROUPS |
79072805 | 1242 | { |
57d7c65e | 1243 | Groups_t *gary = NULL; |
375ed12a JH |
1244 | I32 num_groups = getgroups(0, gary); |
1245 | if (num_groups > 0) { | |
19742f39 | 1246 | I32 i; |
375ed12a JH |
1247 | Newx(gary, num_groups, Groups_t); |
1248 | num_groups = getgroups(num_groups, gary); | |
1249 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1250 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1251 | Safefree(gary); |
1252 | } | |
79072805 | 1253 | } |
155aba94 | 1254 | (void)SvIOK_on(sv); /* what a wonderful hack! */ |
cd70abae | 1255 | #endif |
79072805 | 1256 | break; |
79072805 LW |
1257 | case '0': |
1258 | break; | |
1259 | } | |
a0d0e21e | 1260 | return 0; |
e03e82a0 DM |
1261 | |
1262 | set_undef: | |
1263 | sv_set_undef(sv); | |
1264 | return 0; | |
79072805 LW |
1265 | } |
1266 | ||
1267 | int | |
864dbfa3 | 1268 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1269 | { |
8772537c | 1270 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1271 | |
7918f24d NC |
1272 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1273 | ||
79072805 | 1274 | if (uf && uf->uf_val) |
24f81a43 | 1275 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1276 | return 0; |
1277 | } | |
1278 | ||
1279 | int | |
864dbfa3 | 1280 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1281 | { |
9ae3433d | 1282 | STRLEN len = 0, klen; |
12033064 | 1283 | const char * const key = MgPV_const(mg,klen); |
888a67f6 | 1284 | const char *s = ""; |
1e422769 | 1285 | |
7918f24d NC |
1286 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1287 | ||
613c63b4 | 1288 | SvGETMAGIC(sv); |
12033064 | 1289 | if (SvOK(sv)) { |
613c63b4 CS |
1290 | /* defined environment variables are byte strings; unfortunately |
1291 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1292 | (void)SvPV_force_nomg_nolen(sv); | |
1293 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1294 | if (SvUTF8(sv)) { | |
1295 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1296 | SvUTF8_off(sv); | |
1297 | } | |
1298 | s = SvPVX(sv); | |
1299 | len = SvCUR(sv); | |
12033064 CS |
1300 | } |
1301 | my_setenv(key, s); /* does the deed */ | |
1302 | ||
a0d0e21e LW |
1303 | #ifdef DYNAMIC_ENV_FETCH |
1304 | /* We just undefd an environment var. Is a replacement */ | |
1305 | /* waiting in the wings? */ | |
1306 | if (!len) { | |
6bd66ee9 | 1307 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
fabdb6c0 | 1308 | if (valp) |
4ab59fcc | 1309 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; |
a0d0e21e LW |
1310 | } |
1311 | #endif | |
1e422769 | 1312 | |
28542d8f | 1313 | #if !defined(OS2) && !defined(WIN32) && !defined(MSDOS) |
79072805 LW |
1314 | /* And you'll never guess what the dog had */ |
1315 | /* in its mouth... */ | |
284167a5 | 1316 | if (TAINTING_get) { |
1e422769 | 1317 | MgTAINTEDDIR_off(mg); |
1318 | #ifdef VMS | |
b2aed775 | 1319 | if (s && memEQs(key, klen, "DCL$PATH")) { |
b8ffc8df | 1320 | char pathbuf[256], eltbuf[256], *cp, *elt; |
1e422769 | 1321 | int i = 0, j = 0; |
1322 | ||
6fca0082 | 1323 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); |
b8ffc8df | 1324 | elt = eltbuf; |
1e422769 | 1325 | do { /* DCL$PATH may be a search list */ |
1326 | while (1) { /* as may dev portion of any element */ | |
1327 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1328 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1329 | cando_by_name(S_IWUSR,0,elt) ) { | |
1330 | MgTAINTEDDIR_on(mg); | |
1331 | return 0; | |
1332 | } | |
1333 | } | |
bd61b366 | 1334 | if ((cp = strchr(elt, ':')) != NULL) |
1e422769 | 1335 | *cp = '\0'; |
1336 | if (my_trnlnm(elt, eltbuf, j++)) | |
1337 | elt = eltbuf; | |
1338 | else | |
1339 | break; | |
1340 | } | |
1341 | j = 0; | |
1342 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1343 | } | |
1344 | #endif /* VMS */ | |
b2aed775 | 1345 | if (s && memEQs(key, klen, "PATH")) { |
8772537c | 1346 | const char * const strend = s + len; |
463ee0b2 | 1347 | |
70b484a8 DM |
1348 | /* set MGf_TAINTEDDIR if any component of the new path is |
1349 | * relative or world-writeable */ | |
463ee0b2 | 1350 | while (s < strend) { |
96827780 | 1351 | char tmpbuf[256]; |
c623ac67 | 1352 | Stat_t st; |
5f74f29c | 1353 | I32 i; |
83269ced CB |
1354 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1355 | const char path_sep = PL_perllib_sep; | |
f5a63d97 AL |
1356 | #else |
1357 | const char path_sep = ':'; | |
1358 | #endif | |
ba0a4150 | 1359 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
427eaa01 | 1360 | s, strend, path_sep, &i); |
463ee0b2 | 1361 | s++; |
bb7a0f54 | 1362 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ |
83269ced CB |
1363 | #ifdef __VMS |
1364 | /* no colon thus no device name -- assume relative path */ | |
1365 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1366 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1367 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 CB |
1368 | #else |
1369 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ | |
1370 | #endif | |
c6ed36e1 | 1371 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
8990e307 | 1372 | MgTAINTEDDIR_on(mg); |
1e422769 | 1373 | return 0; |
1374 | } | |
463ee0b2 | 1375 | } |
79072805 LW |
1376 | } |
1377 | } | |
28542d8f | 1378 | #endif /* neither OS2 nor WIN32 nor MSDOS */ |
1e422769 | 1379 | |
79072805 LW |
1380 | return 0; |
1381 | } | |
1382 | ||
1383 | int | |
864dbfa3 | 1384 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1385 | { |
7918f24d | 1386 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1387 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1388 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1389 | return 0; |
1390 | } | |
1391 | ||
88e89b8a | 1392 | int |
864dbfa3 | 1393 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1394 | { |
7918f24d | 1395 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1396 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1397 | #if defined(VMS) |
cea2e8a9 | 1398 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1399 | #else |
3280af22 | 1400 | if (PL_localizing) { |
fb73857a | 1401 | HE* entry; |
b0269e46 | 1402 | my_clearenv(); |
85fbaab2 NC |
1403 | hv_iterinit(MUTABLE_HV(sv)); |
1404 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
fb73857a | 1405 | I32 keylen; |
1406 | my_setenv(hv_iterkey(entry, &keylen), | |
85fbaab2 | 1407 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); |
fb73857a | 1408 | } |
1409 | } | |
1410 | #endif | |
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | int | |
864dbfa3 | 1415 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1416 | { |
7918f24d | 1417 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1418 | PERL_UNUSED_ARG(sv); |
1419 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1420 | #if defined(VMS) |
1421 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1422 | #else | |
1423 | my_clearenv(); | |
1424 | #endif | |
3e3baf6d | 1425 | return 0; |
66b1d557 HM |
1426 | } |
1427 | ||
64ca3a65 | 1428 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1429 | #ifdef HAS_SIGPROCMASK |
1430 | static void | |
1431 | restore_sigmask(pTHX_ SV *save_sv) | |
1432 | { | |
0bd48802 | 1433 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1434 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1435 | } |
1436 | #endif | |
66b1d557 | 1437 | int |
864dbfa3 | 1438 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1439 | { |
88e89b8a | 1440 | /* Are we fetching a signal entry? */ |
708854f2 | 1441 | int i = (I16)mg->mg_private; |
7918f24d NC |
1442 | |
1443 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1444 | ||
708854f2 | 1445 | if (!i) { |
84c7b88c BF |
1446 | STRLEN siglen; |
1447 | const char * sig = MgPV_const(mg, siglen); | |
1448 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1449 | } |
1450 | ||
e02bfb16 | 1451 | if (i > 0) { |
22c35a8c GS |
1452 | if(PL_psig_ptr[i]) |
1453 | sv_setsv(sv,PL_psig_ptr[i]); | |
88e89b8a | 1454 | else { |
46da273f | 1455 | Sighandler_t sigstate = rsignal_state(i); |
23ada85b | 1456 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
46da273f AL |
1457 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1458 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1459 | #endif |
1460 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
46da273f AL |
1461 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1462 | sigstate = SIG_DFL; | |
85b332e2 | 1463 | #endif |
88e89b8a | 1464 | /* cache state so we don't fetch it again */ |
8aad04aa | 1465 | if(sigstate == (Sighandler_t) SIG_IGN) |
6502358f | 1466 | sv_setpvs(sv,"IGNORE"); |
88e89b8a | 1467 | else |
e03e82a0 | 1468 | sv_set_undef(sv); |
46da273f | 1469 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
88e89b8a | 1470 | SvTEMP_off(sv); |
1471 | } | |
1472 | } | |
1473 | return 0; | |
1474 | } | |
1475 | int | |
864dbfa3 | 1476 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1477 | { |
7918f24d | 1478 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1479 | |
38a124f0 | 1480 | magic_setsig(NULL, mg); |
179c85a2 | 1481 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1482 | } |
3d37d572 | 1483 | |
dc37125b | 1484 | |
5e7940ce | 1485 | #ifdef PERL_USE_3ARG_SIGHANDLER |
dc37125b DM |
1486 | Signal_t |
1487 | Perl_csighandler(int sig, Siginfo_t *sip, void *uap) | |
1488 | { | |
1489 | Perl_csighandler3(sig, sip, uap); | |
1490 | } | |
8aad04aa | 1491 | #else |
dc37125b | 1492 | Signal_t |
0a8e0eff | 1493 | Perl_csighandler(int sig) |
dc37125b DM |
1494 | { |
1495 | Perl_csighandler3(sig, NULL, NULL); | |
1496 | } | |
8aad04aa | 1497 | #endif |
dc37125b DM |
1498 | |
1499 | Signal_t | |
1500 | Perl_csighandler1(int sig) | |
1501 | { | |
1502 | Perl_csighandler3(sig, NULL, NULL); | |
1503 | } | |
1504 | ||
1505 | /* Handler intended to directly handle signal calls from the kernel. | |
1506 | * (Depending on configuration, the kernel may actually call one of the | |
1507 | * wrappers csighandler() or csighandler1() instead.) | |
1508 | * It either queues up the signal or dispatches it immediately depending | |
1509 | * on whether safe signals are enabled and whether the signal is capable | |
1510 | * of being deferred (e.g. SEGV isn't). | |
1511 | */ | |
1512 | ||
1513 | Signal_t | |
1514 | Perl_csighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
0a8e0eff | 1515 | { |
1018e26f NIS |
1516 | #ifdef PERL_GET_SIG_CONTEXT |
1517 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1518 | #else | |
85b332e2 CL |
1519 | dTHX; |
1520 | #endif | |
5e7940ce DM |
1521 | |
1522 | #ifdef PERL_USE_3ARG_SIGHANDLER | |
ffb6256b JH |
1523 | #if defined(__cplusplus) && defined(__GNUC__) |
1524 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1525 | * parameters would be warned about. */ | |
1526 | PERL_UNUSED_ARG(sip); | |
1527 | PERL_UNUSED_ARG(uap); | |
1528 | #endif | |
1271a1be | 1529 | #endif |
5e7940ce | 1530 | |
23ada85b | 1531 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1532 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1533 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1534 | #endif |
2e34cc90 | 1535 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1536 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1537 | #ifdef KILL_BY_SIGPRC |
1538 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1539 | #else | |
1540 | exit(1); | |
1541 | #endif | |
1542 | #endif | |
406878dd | 1543 | if ( |
853d2c32 RGS |
1544 | #ifdef SIGILL |
1545 | sig == SIGILL || | |
1546 | #endif | |
1547 | #ifdef SIGBUS | |
1548 | sig == SIGBUS || | |
1549 | #endif | |
1550 | #ifdef SIGSEGV | |
1551 | sig == SIGSEGV || | |
1552 | #endif | |
1553 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) | |
4ffa73a3 | 1554 | /* Call the perl level handler now-- |
31c91b43 | 1555 | * with risk we may be in malloc() or being destructed etc. */ |
8a5e470b DM |
1556 | { |
1557 | if (PL_sighandlerp == Perl_sighandler) | |
1558 | /* default handler, so can call perly_sighandler() directly | |
1559 | * rather than via Perl_sighandler, passing the extra | |
1560 | * 'safe = false' arg | |
1561 | */ | |
ddb513d5 | 1562 | Perl_perly_sighandler(sig, NULL, NULL, 0 /* unsafe */); |
8a5e470b | 1563 | else |
5e7940ce | 1564 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1565 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1566 | #else |
8a5e470b | 1567 | (*PL_sighandlerp)(sig); |
92807b6d | 1568 | #endif |
8a5e470b | 1569 | } |
406878dd | 1570 | else { |
31c91b43 | 1571 | if (!PL_psig_pend) return; |
406878dd GA |
1572 | /* Set a flag to say this signal is pending, that is awaiting delivery after |
1573 | * the current Perl opcode completes */ | |
1574 | PL_psig_pend[sig]++; | |
1575 | ||
1576 | #ifndef SIG_PENDING_DIE_COUNT | |
1577 | # define SIG_PENDING_DIE_COUNT 120 | |
1578 | #endif | |
fe13d51d | 1579 | /* Add one to say _a_ signal is pending */ |
406878dd GA |
1580 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) |
1581 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1582 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
1583 | } | |
0a8e0eff NIS |
1584 | } |
1585 | ||
2e34cc90 CL |
1586 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1587 | void | |
1588 | Perl_csighandler_init(void) | |
1589 | { | |
1590 | int sig; | |
27da23d5 | 1591 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1592 | |
1593 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1594 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1595 | dTHX; |
27da23d5 | 1596 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1597 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1598 | #endif |
1599 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1600 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1601 | #endif |
1602 | } | |
27da23d5 | 1603 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1604 | } |
1605 | #endif | |
1606 | ||
7fe50b8b LT |
1607 | #if defined HAS_SIGPROCMASK |
1608 | static void | |
1609 | unblock_sigmask(pTHX_ void* newset) | |
1610 | { | |
dc3bf405 | 1611 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1612 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1613 | } | |
1614 | #endif | |
1615 | ||
0a8e0eff NIS |
1616 | void |
1617 | Perl_despatch_signals(pTHX) | |
1618 | { | |
1619 | int sig; | |
1620 | PL_sig_pending = 0; | |
1621 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1622 | if (PL_psig_pend[sig]) { | |
d0166017 | 1623 | dSAVE_ERRNO; |
7fe50b8b | 1624 | #ifdef HAS_SIGPROCMASK |
55534442 LT |
1625 | /* From sigaction(2) (FreeBSD man page): |
1626 | * | Signal routines normally execute with the signal that | |
1627 | * | caused their invocation blocked, but other signals may | |
1628 | * | yet occur. | |
1629 | * Emulation of this behavior (from within Perl) is enabled | |
1630 | * using sigprocmask | |
1631 | */ | |
1632 | int was_blocked; | |
1633 | sigset_t newset, oldset; | |
1634 | ||
1635 | sigemptyset(&newset); | |
1636 | sigaddset(&newset, sig); | |
1637 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1638 | was_blocked = sigismember(&oldset, sig); | |
7fe50b8b LT |
1639 | if (!was_blocked) { |
1640 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1641 | ENTER; | |
1642 | SAVEFREESV(save_sv); | |
1643 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1644 | } | |
55534442 | 1645 | #endif |
25da4428 | 1646 | PL_psig_pend[sig] = 0; |
8a5e470b DM |
1647 | if (PL_sighandlerp == Perl_sighandler) |
1648 | /* default handler, so can call perly_sighandler() directly | |
1649 | * rather than via Perl_sighandler, passing the extra | |
1650 | * 'safe = true' arg | |
1651 | */ | |
1652 | Perl_perly_sighandler(sig, NULL, NULL, 1 /* safe */); | |
1653 | else | |
5e7940ce | 1654 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1655 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1656 | #else |
8a5e470b | 1657 | (*PL_sighandlerp)(sig); |
92807b6d | 1658 | #endif |
8a5e470b | 1659 | |
7fe50b8b | 1660 | #ifdef HAS_SIGPROCMASK |
55534442 | 1661 | if (!was_blocked) |
7fe50b8b | 1662 | LEAVE; |
55534442 | 1663 | #endif |
d0166017 | 1664 | RESTORE_ERRNO; |
0a8e0eff NIS |
1665 | } |
1666 | } | |
1667 | } | |
1668 | ||
38a124f0 | 1669 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1670 | int |
864dbfa3 | 1671 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1672 | { |
79072805 | 1673 | I32 i; |
cbbf8932 | 1674 | SV** svp = NULL; |
2d4fcd5e AJ |
1675 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1676 | * effects (due to closures). We must make sure that the new disposition | |
1677 | * is in place before it is called. | |
1678 | */ | |
cbbf8932 | 1679 | SV* to_dec = NULL; |
e72dc28c | 1680 | STRLEN len; |
2d4fcd5e AJ |
1681 | #ifdef HAS_SIGPROCMASK |
1682 | sigset_t set, save; | |
1683 | SV* save_sv; | |
1684 | #endif | |
eb578fdb | 1685 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1686 | |
1687 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1688 | ||
748a9306 | 1689 | if (*s == '_') { |
84c7b88c | 1690 | if (memEQs(s, len, "__DIE__")) |
3280af22 | 1691 | svp = &PL_diehook; |
84c7b88c | 1692 | else if (memEQs(s, len, "__WARN__") |
38a124f0 NC |
1693 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { |
1694 | /* Merge the existing behaviours, which are as follows: | |
1695 | magic_setsig, we always set svp to &PL_warnhook | |
1696 | (hence we always change the warnings handler) | |
1697 | For magic_clearsig, we don't change the warnings handler if it's | |
1698 | set to the &PL_warnhook. */ | |
3280af22 | 1699 | svp = &PL_warnhook; |
84c7b88c BF |
1700 | } else if (sv) { |
1701 | SV *tmp = sv_newmortal(); | |
1702 | Perl_croak(aTHX_ "No such hook: %s", | |
1703 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1704 | } | |
748a9306 | 1705 | i = 0; |
38a124f0 | 1706 | if (svp && *svp) { |
9289f461 RGS |
1707 | if (*svp != PERL_WARNHOOK_FATAL) |
1708 | to_dec = *svp; | |
cbbf8932 | 1709 | *svp = NULL; |
4633a7c4 | 1710 | } |
748a9306 LW |
1711 | } |
1712 | else { | |
708854f2 NC |
1713 | i = (I16)mg->mg_private; |
1714 | if (!i) { | |
84c7b88c | 1715 | i = whichsig_pvn(s, len); /* ...no, a brick */ |
58a26b12 | 1716 | mg->mg_private = (U16)i; |
708854f2 | 1717 | } |
86d86cad | 1718 | if (i <= 0) { |
84c7b88c BF |
1719 | if (sv) { |
1720 | SV *tmp = sv_newmortal(); | |
1721 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", | |
1722 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1723 | } | |
748a9306 LW |
1724 | return 0; |
1725 | } | |
2d4fcd5e AJ |
1726 | #ifdef HAS_SIGPROCMASK |
1727 | /* Avoid having the signal arrive at a bad time, if possible. */ | |
1728 | sigemptyset(&set); | |
1729 | sigaddset(&set,i); | |
1730 | sigprocmask(SIG_BLOCK, &set, &save); | |
1731 | ENTER; | |
9ff8e806 | 1732 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); |
2d4fcd5e AJ |
1733 | SAVEFREESV(save_sv); |
1734 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1735 | #endif | |
1736 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1737 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
27da23d5 | 1738 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1739 | #endif |
23ada85b | 1740 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
27da23d5 | 1741 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1742 | #endif |
2e34cc90 | 1743 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1744 | PL_sig_defaulting[i] = 0; |
2e34cc90 | 1745 | #endif |
2d4fcd5e | 1746 | to_dec = PL_psig_ptr[i]; |
38a124f0 NC |
1747 | if (sv) { |
1748 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1749 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
79fd3822 NC |
1750 | |
1751 | /* Signals don't change name during the program's execution, so once | |
1752 | they're cached in the appropriate slot of PL_psig_name, they can | |
1753 | stay there. | |
1754 | ||
1755 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1756 | at least, doing most of the work. */ | |
1757 | if (!PL_psig_name[i]) { | |
92d4124b TR |
1758 | const char* name = PL_sig_name[i]; |
1759 | PL_psig_name[i] = newSVpvn(name, strlen(name)); | |
79fd3822 NC |
1760 | SvREADONLY_on(PL_psig_name[i]); |
1761 | } | |
38a124f0 | 1762 | } else { |
79fd3822 | 1763 | SvREFCNT_dec(PL_psig_name[i]); |
38a124f0 NC |
1764 | PL_psig_name[i] = NULL; |
1765 | PL_psig_ptr[i] = NULL; | |
1766 | } | |
748a9306 | 1767 | } |
38a124f0 | 1768 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
2d4fcd5e | 1769 | if (i) { |
5c1546dc | 1770 | (void)rsignal(i, PL_csighandlerp); |
2d4fcd5e | 1771 | } |
748a9306 | 1772 | else |
b37c2d43 | 1773 | *svp = SvREFCNT_inc_simple_NN(sv); |
38a124f0 | 1774 | } else { |
9dfa190b NC |
1775 | if (sv && SvOK(sv)) { |
1776 | s = SvPV_force(sv, len); | |
1777 | } else { | |
1778 | sv = NULL; | |
1779 | } | |
84c7b88c | 1780 | if (sv && memEQs(s, len,"IGNORE")) { |
9dfa190b | 1781 | if (i) { |
23ada85b | 1782 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
9dfa190b NC |
1783 | PL_sig_ignoring[i] = 1; |
1784 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1785 | #else |
9dfa190b | 1786 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1787 | #endif |
9dfa190b | 1788 | } |
2d4fcd5e | 1789 | } |
84c7b88c | 1790 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { |
9dfa190b | 1791 | if (i) { |
2e34cc90 | 1792 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
9dfa190b NC |
1793 | PL_sig_defaulting[i] = 1; |
1794 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1795 | #else |
9dfa190b | 1796 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
2e34cc90 | 1797 | #endif |
9dfa190b NC |
1798 | } |
1799 | } | |
1800 | else { | |
1801 | /* | |
1802 | * We should warn if HINT_STRICT_REFS, but without | |
1803 | * access to a known hint bit in a known OP, we can't | |
1804 | * tell whether HINT_STRICT_REFS is in force or not. | |
1805 | */ | |
0687887e | 1806 | if (!memchr(s, ':', len) && !memchr(s, '\'', len)) |
9dfa190b NC |
1807 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), |
1808 | SV_GMAGIC); | |
1809 | if (i) | |
1810 | (void)rsignal(i, PL_csighandlerp); | |
1811 | else | |
1812 | *svp = SvREFCNT_inc_simple_NN(sv); | |
136e0459 | 1813 | } |
748a9306 | 1814 | } |
9dfa190b | 1815 | |
2d4fcd5e AJ |
1816 | #ifdef HAS_SIGPROCMASK |
1817 | if(i) | |
1818 | LEAVE; | |
1819 | #endif | |
ef8d46e8 | 1820 | SvREFCNT_dec(to_dec); |
79072805 LW |
1821 | return 0; |
1822 | } | |
64ca3a65 | 1823 | #endif /* !PERL_MICRO */ |
79072805 LW |
1824 | |
1825 | int | |
864dbfa3 | 1826 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1827 | { |
7918f24d | 1828 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1829 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1830 | |
89c14e2e | 1831 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1832 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
89c14e2e BB |
1833 | return 0; |
1834 | ||
0e446081 | 1835 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1836 | } |
1837 | ||
0e446081 | 1838 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1839 | int |
52b45067 RD |
1840 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1841 | { | |
52b45067 | 1842 | HV* stash; |
7918f24d NC |
1843 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1844 | ||
52b45067 | 1845 | /* Bail out if destruction is going on */ |
627364f1 | 1846 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1847 | |
0e446081 NC |
1848 | if (sv) |
1849 | av_clear(MUTABLE_AV(sv)); | |
52b45067 | 1850 | |
6624142a FC |
1851 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1852 | /* This occurs with setisa_elem magic, which calls this | |
1853 | same function. */ | |
1854 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
1855 | ||
316ebaf2 | 1856 | assert(mg); |
6624142a FC |
1857 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1858 | SV **svp = AvARRAY((AV *)mg->mg_obj); | |
1859 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1860 | while (items--) { | |
1861 | stash = GvSTASH((GV *)*svp++); | |
1862 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1863 | } | |
1864 | ||
1865 | return 0; | |
1866 | } | |
1867 | ||
52b45067 | 1868 | stash = GvSTASH( |
6624142a | 1869 | (const GV *)mg->mg_obj |
52b45067 RD |
1870 | ); |
1871 | ||
00169e2c FC |
1872 | /* The stash may have been detached from the symbol table, so check its |
1873 | name before doing anything. */ | |
1874 | if (stash && HvENAME_get(stash)) | |
5562fa71 | 1875 | mro_isa_changed_in(stash); |
52b45067 RD |
1876 | |
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | int | |
864dbfa3 | 1881 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1882 | { |
85fbaab2 | 1883 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1884 | I32 i = 0; |
7918f24d NC |
1885 | |
1886 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1887 | PERL_UNUSED_ARG(mg); |
7719e241 | 1888 | |
6ff81951 | 1889 | if (hv) { |
497b47a8 | 1890 | (void) hv_iterinit(hv); |
ad64d0ec | 1891 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1b95d04f | 1892 | i = HvUSEDKEYS(hv); |
497b47a8 JH |
1893 | else { |
1894 | while (hv_iternext(hv)) | |
1895 | i++; | |
1896 | } | |
6ff81951 GS |
1897 | } |
1898 | ||
1899 | sv_setiv(sv, (IV)i); | |
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | int | |
864dbfa3 | 1904 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1905 | { |
7918f24d | 1906 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1907 | PERL_UNUSED_ARG(mg); |
946ec16e | 1908 | if (LvTARG(sv)) { |
85fbaab2 | 1909 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e | 1910 | } |
1911 | return 0; | |
ac27b0f5 | 1912 | } |
946ec16e | 1913 | |
efaf3674 | 1914 | /* |
51b56f5c | 1915 | =for apidoc_section Magic |
efaf3674 DM |
1916 | =for apidoc magic_methcall |
1917 | ||
1918 | Invoke a magic method (like FETCH). | |
1919 | ||
2baee27b FC |
1920 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1921 | ||
1922 | C<meth> is the name of the method to call. | |
1923 | ||
1924 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1925 | ||
1926 | The C<flags> can be: | |
1927 | ||
1928 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1929 | return a value | |
1930 | G_UNDEF_FILL fill the stack with argc pointers to | |
1931 | PL_sv_undef | |
1932 | ||
1933 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1934 | |
796b6530 | 1935 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1936 | |
1937 | ||
1938 | =cut | |
1939 | */ | |
1940 | ||
1941 | SV* | |
36925d9e | 1942 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
046b0c7d | 1943 | U32 argc, ...) |
a0d0e21e LW |
1944 | { |
1945 | dSP; | |
efaf3674 | 1946 | SV* ret = NULL; |
463ee0b2 | 1947 | |
7918f24d NC |
1948 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1949 | ||
efaf3674 | 1950 | ENTER; |
d1d7a15d NC |
1951 | |
1952 | if (flags & G_WRITING_TO_STDERR) { | |
1953 | SAVETMPS; | |
1954 | ||
2782061f | 1955 | save_re_context(); |
d1d7a15d NC |
1956 | SAVESPTR(PL_stderrgv); |
1957 | PL_stderrgv = NULL; | |
1958 | } | |
1959 | ||
efaf3674 | 1960 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1961 | PUSHMARK(SP); |
efaf3674 | 1962 | |
052a7c76 DM |
1963 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1964 | assert(argc <= I32_MAX); | |
1965 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1966 | PUSHs(SvTIED_obj(sv, mg)); |
1967 | if (flags & G_UNDEF_FILL) { | |
1968 | while (argc--) { | |
efaf3674 | 1969 | PUSHs(&PL_sv_undef); |
93965878 | 1970 | } |
67549bd2 | 1971 | } else if (argc > 0) { |
046b0c7d NC |
1972 | va_list args; |
1973 | va_start(args, argc); | |
1974 | ||
1975 | do { | |
35bc1e35 JK |
1976 | SV *const this_sv = va_arg(args, SV *); |
1977 | PUSHs(this_sv); | |
046b0c7d NC |
1978 | } while (--argc); |
1979 | ||
1980 | va_end(args); | |
88e89b8a | 1981 | } |
463ee0b2 | 1982 | PUTBACK; |
efaf3674 | 1983 | if (flags & G_DISCARD) { |
36925d9e | 1984 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1985 | } |
1986 | else { | |
36925d9e | 1987 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
efaf3674 DM |
1988 | ret = *PL_stack_sp--; |
1989 | } | |
1990 | POPSTACK; | |
d1d7a15d NC |
1991 | if (flags & G_WRITING_TO_STDERR) |
1992 | FREETMPS; | |
efaf3674 DM |
1993 | LEAVE; |
1994 | return ret; | |
1995 | } | |
1996 | ||
efaf3674 | 1997 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 1998 | |
efaf3674 | 1999 | STATIC SV* |
36925d9e | 2000 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
2001 | int n, SV *val) |
2002 | { | |
efaf3674 DM |
2003 | SV* arg1 = NULL; |
2004 | ||
2005 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
2006 | ||
2007 | if (mg->mg_ptr) { | |
2008 | if (mg->mg_len >= 0) { | |
db4b3a1d | 2009 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
efaf3674 DM |
2010 | } |
2011 | else if (mg->mg_len == HEf_SVKEY) | |
2012 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
2013 | } | |
2014 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
db4b3a1d | 2015 | arg1 = newSViv((IV)(mg->mg_len)); |
efaf3674 DM |
2016 | sv_2mortal(arg1); |
2017 | } | |
2018 | if (!arg1) { | |
046b0c7d | 2019 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 2020 | } |
046b0c7d | 2021 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e | 2022 | } |
2023 | ||
76e3520e | 2024 | STATIC int |
36925d9e | 2025 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 2026 | { |
efaf3674 | 2027 | SV* ret; |
463ee0b2 | 2028 | |
7918f24d NC |
2029 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
2030 | ||
efaf3674 DM |
2031 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
2032 | if (ret) | |
2033 | sv_setsv(sv, ret); | |
a0d0e21e LW |
2034 | return 0; |
2035 | } | |
463ee0b2 | 2036 | |
a0d0e21e | 2037 | int |
864dbfa3 | 2038 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2039 | { |
7918f24d NC |
2040 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
2041 | ||
fd69380d | 2042 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
a0d0e21e | 2043 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 2044 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
2045 | return 0; |
2046 | } | |
2047 | ||
2048 | int | |
864dbfa3 | 2049 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 2050 | { |
b112cff9 DM |
2051 | MAGIC *tmg; |
2052 | SV *val; | |
7918f24d NC |
2053 | |
2054 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2055 | ||
b112cff9 DM |
2056 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2057 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2058 | * public flags indicate its value based on copying from $val. Doing | |
2059 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2060 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2061 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2062 | * enabled, even though taint magic is in the chain. In which case, | |
2063 | * fake up a temporary tainted value (this is easier than temporarily | |
2064 | * re-enabling magic on sv). */ | |
2065 | ||
284167a5 | 2066 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
b112cff9 DM |
2067 | && (tmg->mg_len & 1)) |
2068 | { | |
2069 | val = sv_mortalcopy(sv); | |
2070 | SvTAINTED_on(val); | |
2071 | } | |
2072 | else | |
2073 | val = sv; | |
2074 | ||
36925d9e | 2075 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2076 | return 0; |
2077 | } | |
2078 | ||
2079 | int | |
864dbfa3 | 2080 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2081 | { |
7918f24d NC |
2082 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2083 | ||
4c13be3f | 2084 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2085 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2086 | } |
463ee0b2 | 2087 | |
93965878 NIS |
2088 | |
2089 | U32 | |
864dbfa3 | 2090 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2091 | { |
22846ab4 | 2092 | I32 retval = 0; |
efaf3674 | 2093 | SV* retsv; |
93965878 | 2094 | |
7918f24d NC |
2095 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2096 | ||
36925d9e | 2097 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 DM |
2098 | if (retsv) { |
2099 | retval = SvIV(retsv)-1; | |
22846ab4 AB |
2100 | if (retval < -1) |
2101 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2102 | } |
22846ab4 | 2103 | return (U32) retval; |
93965878 NIS |
2104 | } |
2105 | ||
cea2e8a9 GS |
2106 | int |
2107 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2108 | { |
7918f24d NC |
2109 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2110 | ||
36925d9e | 2111 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2112 | return 0; |
2113 | } | |
2114 | ||
2115 | int | |
864dbfa3 | 2116 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2117 | { |
efaf3674 | 2118 | SV* ret; |
463ee0b2 | 2119 | |
7918f24d NC |
2120 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2121 | ||
36925d9e RZ |
2122 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
2123 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); | |
efaf3674 DM |
2124 | if (ret) |
2125 | sv_setsv(key,ret); | |
79072805 LW |
2126 | return 0; |
2127 | } | |
2128 | ||
2129 | int | |
1146e912 | 2130 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2131 | { |
7918f24d NC |
2132 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2133 | ||
36925d9e | 2134 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2135 | } |
a0d0e21e | 2136 | |
a3bcc51e TP |
2137 | SV * |
2138 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2139 | { | |
5fcbf73d | 2140 | SV *retval; |
ad64d0ec NC |
2141 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2142 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2143 | |
7918f24d NC |
2144 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2145 | ||
a3bcc51e TP |
2146 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2147 | SV *key; | |
bfcb3514 | 2148 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2149 | /* we are in an iteration so the hash cannot be empty */ |
2150 | return &PL_sv_yes; | |
2151 | /* no xhv_eiter so now use FIRSTKEY */ | |
2152 | key = sv_newmortal(); | |
ad64d0ec | 2153 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2154 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2155 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2156 | } | |
2157 | ||
2158 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2159 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2160 | if (!retval) |
5fcbf73d | 2161 | retval = &PL_sv_undef; |
a3bcc51e TP |
2162 | return retval; |
2163 | } | |
2164 | ||
a0d0e21e | 2165 | int |
864dbfa3 | 2166 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2167 | { |
089b5c60 | 2168 | SV **svp; |
7918f24d NC |
2169 | |
2170 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2171 | ||
089b5c60 NC |
2172 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2173 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2174 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2175 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2176 | } |
2177 | ||
2178 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2179 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a FC |
2180 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
2181 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); | |
089b5c60 | 2182 | |
8772537c | 2183 | if (svp && SvIOKp(*svp)) { |
88df5f01 FC |
2184 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2185 | if (o) { | |
2186 | #ifdef PERL_DEBUG_READONLY_OPS | |
2187 | Slab_to_rw(OpSLAB(o)); | |
2188 | #endif | |
2189 | /* set or clear breakpoint in the relevant control op */ | |
089b5c60 | 2190 | if (SvTRUE(sv)) |
88df5f01 | 2191 | o->op_flags |= OPf_SPECIAL; |
8772537c | 2192 | else |
88df5f01 FC |
2193 | o->op_flags &= ~OPf_SPECIAL; |
2194 | #ifdef PERL_DEBUG_READONLY_OPS | |
2195 | Slab_to_ro(OpSLAB(o)); | |
2196 | #endif | |
8772537c | 2197 | } |
5df8de69 | 2198 | } |
79072805 LW |
2199 | return 0; |
2200 | } | |
2201 | ||
2202 | int | |
8772537c | 2203 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2204 | { |
502c6561 | 2205 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2206 | |
2207 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2208 | ||
83bf042f | 2209 | if (obj) { |
e1dccc0d | 2210 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2211 | } else { |
3773545d | 2212 | sv_set_undef(sv); |
83bf042f | 2213 | } |
79072805 LW |
2214 | return 0; |
2215 | } | |
2216 | ||
2217 | int | |
864dbfa3 | 2218 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2219 | { |
502c6561 | 2220 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2221 | |
2222 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2223 | ||
83bf042f | 2224 | if (obj) { |
e1dccc0d | 2225 | av_fill(obj, SvIV(sv)); |
83bf042f | 2226 | } else { |
a2a5de95 NC |
2227 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2228 | "Attempt to set length of freed array"); | |
83bf042f NC |
2229 | } |
2230 | return 0; | |
2231 | } | |
2232 | ||
2233 | int | |
83f29afa VP |
2234 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2235 | { | |
83f29afa VP |
2236 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2237 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2238 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2239 | |
2240 | /* Reset the iterator when the array is cleared */ | |
4803e7f7 Z |
2241 | if (sizeof(IV) == sizeof(SSize_t)) { |
2242 | *((IV *) &(mg->mg_len)) = 0; | |
2243 | } else { | |
2244 | if (mg->mg_ptr) | |
2245 | *((IV *) mg->mg_ptr) = 0; | |
2246 | } | |
83f29afa VP |
2247 | |
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | int | |
83bf042f NC |
2252 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2253 | { | |
7918f24d | 2254 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2255 | PERL_UNUSED_ARG(sv); |
7918f24d | 2256 | |
94f3782b DM |
2257 | /* during global destruction, mg_obj may already have been freed */ |
2258 | if (PL_in_clean_all) | |
1ea47f64 | 2259 | return 0; |
94f3782b | 2260 | |
83bf042f NC |
2261 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2262 | ||
2263 | if (mg) { | |
2264 | /* arylen scalar holds a pointer back to the array, but doesn't own a | |
2265 | reference. Hence the we (the array) are about to go away with it | |
2266 | still pointing at us. Clear its pointer, else it would be pointing | |
2267 | at free memory. See the comment in sv_magic about reference loops, | |
2268 | and why it can't own a reference to us. */ | |
2269 | mg->mg_obj = 0; | |
2270 | } | |
a0d0e21e LW |
2271 | return 0; |
2272 | } | |
2273 | ||
2274 | int | |
864dbfa3 | 2275 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2276 | { |
16eb5365 | 2277 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2278 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2279 | |
2280 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2281 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2282 | |
6174b39a FC |
2283 | if (found && found->mg_len != -1) { |
2284 | STRLEN i = found->mg_len; | |
25fdce4a | 2285 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) |
6174b39a FC |
2286 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); |
2287 | sv_setuv(sv, i); | |
a0d0e21e | 2288 | return 0; |
a0d0e21e | 2289 | } |
3773545d | 2290 | sv_set_undef(sv); |
a0d0e21e LW |
2291 | return 0; |
2292 | } | |
2293 | ||
2294 | int | |
864dbfa3 | 2295 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2296 | { |
16eb5365 | 2297 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2298 | SSize_t pos; |
2299 | STRLEN len; | |
53d44271 | 2300 | MAGIC* found; |
aec43834 | 2301 | const char *s; |
a0d0e21e | 2302 | |
7918f24d | 2303 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2304 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2305 | |
96c2a8ff | 2306 | found = mg_find_mglob(lsv); |
3881461a | 2307 | if (!found) { |
a0d0e21e LW |
2308 | if (!SvOK(sv)) |
2309 | return 0; | |
96c2a8ff | 2310 | found = sv_magicext_mglob(lsv); |
a0d0e21e LW |
2311 | } |
2312 | else if (!SvOK(sv)) { | |
3881461a | 2313 | found->mg_len = -1; |
a0d0e21e LW |
2314 | return 0; |
2315 | } | |
aec43834 | 2316 | s = SvPV_const(lsv, len); |
a0d0e21e | 2317 | |
e1dccc0d | 2318 | pos = SvIV(sv); |
a0ed51b3 | 2319 | |
7e2040f0 | 2320 | if (DO_UTF8(lsv)) { |
19742f39 | 2321 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
a0ed51b3 LW |
2322 | if (ulen) |
2323 | len = ulen; | |
a0ed51b3 LW |
2324 | } |
2325 | ||
a0d0e21e LW |
2326 | if (pos < 0) { |
2327 | pos += len; | |
2328 | if (pos < 0) | |
2329 | pos = 0; | |
2330 | } | |
eb160463 | 2331 | else if (pos > (SSize_t)len) |
a0d0e21e | 2332 | pos = len; |
a0ed51b3 | 2333 | |
3881461a | 2334 | found->mg_len = pos; |
25fdce4a | 2335 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2336 | |
79072805 LW |
2337 | return 0; |
2338 | } | |
2339 | ||
2340 | int | |
864dbfa3 | 2341 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2342 | { |
2343 | STRLEN len; | |
35a4481c | 2344 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2345 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2346 | STRLEN offs = LvTARGOFF(sv); |
2347 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2348 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2349 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2350 | |
2351 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2352 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2353 | |
83f78d1a | 2354 | if (!translate_substr_offsets( |
4ddea69a | 2355 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
83f78d1a FC |
2356 | negoff ? -(IV)offs : (IV)offs, !negoff, |
2357 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
2358 | )) { | |
2359 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); | |
e03e82a0 | 2360 | sv_set_undef(sv); |
83f78d1a FC |
2361 | return 0; |
2362 | } | |
2363 | ||
9aa983d2 | 2364 | if (SvUTF8(lsv)) |
4ddea69a | 2365 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2366 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2367 | if (SvUTF8(lsv)) |
2ef4b674 | 2368 | SvUTF8_on(sv); |
6ff81951 GS |
2369 | return 0; |
2370 | } | |
2371 | ||
2372 | int | |
864dbfa3 | 2373 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2374 | { |
83f78d1a | 2375 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2376 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2377 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2378 | STRLEN lvoff = LvTARGOFF(sv); |
2379 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2380 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2381 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2382 | |
2383 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2384 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2385 | |
a74fb2cd FC |
2386 | SvGETMAGIC(lsv); |
2387 | if (SvROK(lsv)) | |
2388 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), | |
2389 | "Attempt to use reference as lvalue in substr" | |
2390 | ); | |
fc061ed8 FC |
2391 | SvPV_force_nomg(lsv,lsv_len); |
2392 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a FC |
2393 | if (!translate_substr_offsets( |
2394 | lsv_len, | |
2395 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2396 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
2397 | )) | |
2398 | Perl_croak(aTHX_ "substr outside of string"); | |
2399 | oldtarglen = lvlen; | |
1aa99e6b | 2400 | if (DO_UTF8(sv)) { |
73a087f0 | 2401 | sv_utf8_upgrade_nomg(lsv); |
d931b1be | 2402 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
a74fb2cd | 2403 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
7a385470 | 2404 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); |
9aa983d2 JH |
2405 | SvUTF8_on(lsv); |
2406 | } | |
0d336106 | 2407 | else if (SvUTF8(lsv)) { |
5fcbf73d | 2408 | const char *utf8; |
d931b1be | 2409 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
83f78d1a | 2410 | newtarglen = len; |
5fcbf73d | 2411 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); |
a74fb2cd | 2412 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); |
5fcbf73d | 2413 | Safefree(utf8); |
1aa99e6b | 2414 | } |
b76f3ce2 | 2415 | else { |
a74fb2cd | 2416 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
83f78d1a | 2417 | newtarglen = len; |
b76f3ce2 | 2418 | } |
83f78d1a FC |
2419 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2420 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2421 | |
79072805 LW |
2422 | return 0; |
2423 | } | |
2424 | ||
2425 | int | |
864dbfa3 | 2426 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2427 | { |
7918f24d | 2428 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2429 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2430 | #ifdef NO_TAINT_SUPPORT |
2431 | PERL_UNUSED_ARG(mg); | |
2432 | #endif | |
7918f24d | 2433 | |
64ff300b | 2434 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2435 | return 0; |
2436 | } | |
2437 | ||
2438 | int | |
864dbfa3 | 2439 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2440 | { |
7918f24d | 2441 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2442 | PERL_UNUSED_ARG(sv); |
7918f24d | 2443 | |
b01e650a | 2444 | /* update taint status */ |
284167a5 | 2445 | if (TAINT_get) |
b01e650a DM |
2446 | mg->mg_len |= 1; |
2447 | else | |
2448 | mg->mg_len &= ~1; | |
463ee0b2 LW |
2449 | return 0; |
2450 | } | |
2451 | ||
2452 | int | |
864dbfa3 | 2453 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2454 | { |
35a4481c | 2455 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2456 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2457 | |
2458 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2459 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2460 | |
1b92e694 | 2461 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2462 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2463 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2464 | |
6ff81951 GS |
2465 | return 0; |
2466 | } | |
2467 | ||
2468 | int | |
864dbfa3 | 2469 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2470 | { |
7918f24d | 2471 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2472 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2473 | do_vecset(sv); /* XXX slurp this routine */ |
2474 | return 0; | |
2475 | } | |
2476 | ||
13733cde FC |
2477 | SV * |
2478 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2479 | { |
a0714e2c | 2480 | SV *targ = NULL; |
13733cde FC |
2481 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2482 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2483 | assert(mg); | |
5f05dabc | 2484 | if (LvTARGLEN(sv)) { |
68dc0745 | 2485 | if (mg->mg_obj) { |
8772537c | 2486 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2487 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); |
6d822dc4 MS |
2488 | if (he) |
2489 | targ = HeVAL(he); | |
68dc0745 | 2490 | } |
bbfdc870 | 2491 | else if (LvSTARGOFF(sv) >= 0) { |
502c6561 | 2492 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2493 | if (LvSTARGOFF(sv) <= AvFILL(av)) |
ca58dfd9 FC |
2494 | { |
2495 | if (SvRMAGICAL(av)) { | |
2496 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2497 | targ = svp ? *svp : NULL; | |
2498 | } | |
2499 | else | |
bbfdc870 | 2500 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; |
ca58dfd9 | 2501 | } |
68dc0745 | 2502 | } |
46da273f | 2503 | if (targ && (targ != &PL_sv_undef)) { |
68dc0745 | 2504 | /* somebody else defined it for us */ |
2505 | SvREFCNT_dec(LvTARG(sv)); | |
b37c2d43 | 2506 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); |
68dc0745 | 2507 | LvTARGLEN(sv) = 0; |
2508 | SvREFCNT_dec(mg->mg_obj); | |
a0714e2c | 2509 | mg->mg_obj = NULL; |
68dc0745 | 2510 | mg->mg_flags &= ~MGf_REFCOUNTED; |
2511 | } | |
13733cde | 2512 | return targ; |
5f05dabc | 2513 | } |
71be2cbc | 2514 | else |
13733cde FC |
2515 | return LvTARG(sv); |
2516 | } | |
2517 | ||
2518 | int | |
2519 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2520 | { | |
2521 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2522 | ||
2523 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc | 2524 | return 0; |
2525 | } | |
2526 | ||
2527 | int | |
864dbfa3 | 2528 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2529 | { |
7918f24d | 2530 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2531 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2532 | if (LvTARGLEN(sv)) |
68dc0745 | 2533 | vivify_defelem(sv); |
2534 | if (LvTARG(sv)) { | |
5f05dabc | 2535 | sv_setsv(LvTARG(sv), sv); |
68dc0745 | 2536 | SvSETMAGIC(LvTARG(sv)); |
2537 | } | |
5f05dabc | 2538 | return 0; |
2539 | } | |
2540 | ||
71be2cbc | 2541 | void |
864dbfa3 | 2542 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2543 | { |
74e13ce4 | 2544 | MAGIC *mg; |
a0714e2c | 2545 | SV *value = NULL; |
71be2cbc | 2546 | |
7918f24d NC |
2547 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2548 | ||
14befaf4 | 2549 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
71be2cbc | 2550 | return; |
68dc0745 | 2551 | if (mg->mg_obj) { |
8772537c | 2552 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2553 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); |
6d822dc4 MS |
2554 | if (he) |
2555 | value = HeVAL(he); | |
3280af22 | 2556 | if (!value || value == &PL_sv_undef) |
be2597df | 2557 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); |
71be2cbc | 2558 | } |
bbfdc870 FC |
2559 | else if (LvSTARGOFF(sv) < 0) |
2560 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
68dc0745 | 2561 | else { |
502c6561 | 2562 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2563 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) |
a0714e2c | 2564 | LvTARG(sv) = NULL; /* array can't be extended */ |
68dc0745 | 2565 | else { |
bbfdc870 | 2566 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); |
031c6d82 | 2567 | if (!svp || !(value = *svp)) |
bbfdc870 | 2568 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 | 2569 | } |
2570 | } | |
b37c2d43 | 2571 | SvREFCNT_inc_simple_void(value); |
68dc0745 | 2572 | SvREFCNT_dec(LvTARG(sv)); |
2573 | LvTARG(sv) = value; | |
71be2cbc | 2574 | LvTARGLEN(sv) = 0; |
68dc0745 | 2575 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2576 | mg->mg_obj = NULL; |
68dc0745 | 2577 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc | 2578 | } |
2579 | ||
2580 | int | |
1f1dcfb5 FC |
2581 | Perl_magic_setnonelem(pTHX_ SV *sv, MAGIC *mg) |
2582 | { | |
2583 | PERL_ARGS_ASSERT_MAGIC_SETNONELEM; | |
2584 | PERL_UNUSED_ARG(mg); | |
2585 | sv_unmagic(sv, PERL_MAGIC_nonelem); | |
2586 | return 0; | |
2587 | } | |
2588 | ||
2589 | int | |
864dbfa3 | 2590 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2591 | { |
7918f24d | 2592 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2593 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2594 | return 0; | |
810b8aa5 GS |
2595 | } |
2596 | ||
2597 | int | |
864dbfa3 | 2598 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2599 | { |
7918f24d | 2600 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2601 | PERL_UNUSED_CONTEXT; |
0177730e | 2602 | PERL_UNUSED_ARG(sv); |
565764a8 | 2603 | mg->mg_len = -1; |
93a17b20 LW |
2604 | return 0; |
2605 | } | |
2606 | ||
2607 | int | |
864dbfa3 | 2608 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2609 | { |
35a4481c | 2610 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2611 | |
7918f24d NC |
2612 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2613 | ||
79072805 | 2614 | if (uf && uf->uf_set) |
24f81a43 | 2615 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2616 | return 0; |
2617 | } | |
2618 | ||
c277df42 | 2619 | int |
faf82a0b AE |
2620 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2621 | { | |
488344d2 | 2622 | const char type = mg->mg_type; |
7918f24d NC |
2623 | |
2624 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2625 | ||
a5c7cb08 DM |
2626 | assert( type == PERL_MAGIC_fm |
2627 | || type == PERL_MAGIC_qr | |
2628 | || type == PERL_MAGIC_bm); | |
488344d2 | 2629 | return sv_unmagic(sv, type); |
faf82a0b AE |
2630 | } |
2631 | ||
7a4c00b4 | 2632 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2633 | int |
864dbfa3 | 2634 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2635 | { |
7918f24d NC |
2636 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2637 | ||
bbce6d69 | 2638 | /* |
838b5b74 | 2639 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 | 2640 | * and vanished with a faint plop. |
2641 | */ | |
96a5add6 | 2642 | PERL_UNUSED_CONTEXT; |
8772537c | 2643 | PERL_UNUSED_ARG(sv); |
7a4c00b4 | 2644 | if (mg->mg_ptr) { |
2645 | Safefree(mg->mg_ptr); | |
2646 | mg->mg_ptr = NULL; | |
565764a8 | 2647 | mg->mg_len = -1; |
7a4c00b4 | 2648 | } |
bbce6d69 | 2649 | return 0; |
2650 | } | |
7a4c00b4 | 2651 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2652 | |
7e8c5dac HS |
2653 | /* Just clear the UTF-8 cache data. */ |
2654 | int | |
2655 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2656 | { | |
7918f24d | 2657 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2658 | PERL_UNUSED_CONTEXT; |
8772537c | 2659 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2660 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2661 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2662 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2663 | return 0; | |
2664 | } | |
2665 | ||
bbce6d69 | 2666 | int |
9cce4f9a FC |
2667 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2668 | { | |
9782ce69 | 2669 | const char *bad = NULL; |
9cce4f9a | 2670 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2671 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2672 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2673 | case OPpLVREF_SV: | |
2674 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) | |
2675 | bad = " SCALAR"; | |
2676 | break; | |
2677 | case OPpLVREF_AV: | |
2678 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) | |
2679 | bad = "n ARRAY"; | |
2680 | break; | |
2681 | case OPpLVREF_HV: | |
2682 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) | |
2683 | bad = " HASH"; | |
2684 | break; | |
2685 | case OPpLVREF_CV: | |
2686 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) | |
2687 | bad = " CODE"; | |
2688 | } | |
2689 | if (bad) | |
26a50d99 | 2690 | /* diag_listed_as: Assigned value is not %s reference */ |
9782ce69 | 2691 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); |
c146a62a FC |
2692 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2693 | case 0: | |
2694 | { | |
2695 | SV * const old = PAD_SV(mg->mg_len); | |
2696 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2697 | SvREFCNT_dec(old); | |
2698 | break; | |
2699 | } | |
2700 | case SVt_PVGV: | |
2701 | gv_setref(mg->mg_obj, sv); | |
2702 | SvSETMAGIC(mg->mg_obj); | |
6102323a FC |
2703 | break; |
2704 | case SVt_PVAV: | |
2705 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), | |
2706 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
5f94141d FC |
2707 | break; |
2708 | case SVt_PVHV: | |
7fcb36d5 JH |
2709 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
2710 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); | |
c146a62a | 2711 | } |
d39c26a6 FC |
2712 | if (mg->mg_flags & MGf_PERSIST) |
2713 | NOOP; /* This sv is in use as an iterator var and will be reused, | |
2714 | so we must leave the magic. */ | |
2715 | else | |
2716 | /* This sv could be returned by the assignment op, so clear the | |
2717 | magic, as lvrefs are an implementation detail that must not be | |
2718 | leaked to the user. */ | |
2719 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2720 | return 0; |
2721 | } | |
2722 | ||
f1540bed JH |
2723 | static void |
2724 | S_set_dollarzero(pTHX_ SV *sv) | |
2725 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2726 | { | |
2727 | #ifdef USE_ITHREADS | |
f1540bed JH |
2728 | #endif |
2729 | const char *s; | |
2730 | STRLEN len; | |
f1540bed JH |
2731 | #ifdef HAS_SETPROCTITLE |
2732 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2733 | * show a string from the process struct and provide | |
2734 | * the setproctitle() routine to manipulate that. */ | |
2735 | if (PL_origalen != 1) { | |
2736 | s = SvPV_const(sv, len); | |
38626956 | 2737 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2738 | /* The leading "-" removes the "perl: " prefix, |
2739 | * but not the "(perl) suffix from the ps(1) | |
2740 | * output, because that's what ps(1) shows if the | |
2741 | * argv[] is modified. */ | |
2742 | setproctitle("-%s", s); | |
2743 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2744 | /* This doesn't really work if you assume that | |
2745 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2746 | * because in ps(1) output the result will be like | |
2747 | * sprintf("perl: %s (perl)", s) | |
2748 | * I guess this is a security feature: | |
2749 | * one (a user process) cannot get rid of the original name. | |
2750 | * --jhi */ | |
2751 | setproctitle("%s", s); | |
2752 | # endif | |
2753 | } | |
2754 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2755 | if (PL_origalen != 1) { | |
2756 | union pstun un; | |
2757 | s = SvPV_const(sv, len); | |
2758 | un.pst_command = (char *)s; | |
2759 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2760 | } | |
2761 | #else | |
2762 | if (PL_origalen > 1) { | |
4f3e04fd | 2763 | I32 i; |
f1540bed JH |
2764 | /* PL_origalen is set in perl_parse(). */ |
2765 | s = SvPV_force(sv,len); | |
2766 | if (len >= (STRLEN)PL_origalen-1) { | |
2767 | /* Longer than original, will be truncated. We assume that | |
2768 | * PL_origalen bytes are available. */ | |
2769 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2770 | } | |
2771 | else { | |
2772 | /* Shorter than original, will be padded. */ | |
2773 | #ifdef PERL_DARWIN | |
2774 | /* Special case for Mac OS X: see [perl #38868] */ | |
2775 | const int pad = 0; | |
2776 | #else | |
2777 | /* Is the space counterintuitive? Yes. | |
2778 | * (You were expecting \0?) | |
2779 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2780 | * --jhi */ | |
2781 | const int pad = ' '; | |
2782 | #endif | |
2783 | Copy(s, PL_origargv[0], len, char); | |
2784 | PL_origargv[0][len] = 0; | |
2785 | memset(PL_origargv[0] + len + 1, | |
2786 | pad, PL_origalen - len - 1); | |
2787 | } | |
2788 | PL_origargv[0][PL_origalen-1] = 0; | |
2789 | for (i = 1; i < PL_origargc; i++) | |
2790 | PL_origargv[i] = 0; | |
2791 | #ifdef HAS_PRCTL_SET_NAME | |
2792 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2793 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2794 | /* diag_listed_as: SKIPME */ | |
2795 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2796 | } | |
2797 | #endif | |
2798 | } | |
2799 | #endif | |
2800 | } | |
2801 | ||
9cce4f9a | 2802 | int |
864dbfa3 | 2803 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2804 | { |
20b7effb | 2805 | #ifdef USE_ITHREADS |
20b7effb | 2806 | #endif |
eb578fdb KW |
2807 | I32 paren; |
2808 | const REGEXP * rx; | |
79072805 | 2809 | I32 i; |
8990e307 | 2810 | STRLEN len; |
125b9982 | 2811 | MAGIC *tmg; |
2fdbfb4d | 2812 | |
7918f24d NC |
2813 | PERL_ARGS_ASSERT_MAGIC_SET; |
2814 | ||
e91d8259 | 2815 | if (!mg->mg_ptr) { |
960b831f | 2816 | paren = mg->mg_len; |
1e05feb3 | 2817 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2818 | setparen_got_rx: |
2fdbfb4d | 2819 | CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv); |
1e05feb3 | 2820 | } else { |
2fdbfb4d AB |
2821 | /* Croak with a READONLY error when a numbered match var is |
2822 | * set without a previous pattern match. Unless it's C<local $1> | |
2823 | */ | |
e91d8259 | 2824 | croakparen: |
2fdbfb4d | 2825 | if (!PL_localizing) { |
cb077ed2 | 2826 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2827 | } |
2828 | } | |
e91d8259 NC |
2829 | return 0; |
2830 | } | |
2831 | ||
2832 | switch (*mg->mg_ptr) { | |
748a9306 | 2833 | case '\001': /* ^A */ |
f2da823f FC |
2834 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2835 | else SvOK_off(PL_bodytarget); | |
64eff8b7 DM |
2836 | FmLINES(PL_bodytarget) = 0; |
2837 | if (SvPOK(PL_bodytarget)) { | |
2838 | char *s = SvPVX(PL_bodytarget); | |
0687887e KW |
2839 | char *e = SvEND(PL_bodytarget); |
2840 | while ( ((s = (char *) memchr(s, '\n', e - s))) ) { | |
64eff8b7 DM |
2841 | FmLINES(PL_bodytarget)++; |
2842 | s++; | |
2843 | } | |
2844 | } | |
125b9982 | 2845 | /* mg_set() has temporarily made sv non-magical */ |
284167a5 | 2846 | if (TAINTING_get) { |
125b9982 NT |
2847 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) |
2848 | SvTAINTED_on(PL_bodytarget); | |
2849 | else | |
2850 | SvTAINTED_off(PL_bodytarget); | |
2851 | } | |
748a9306 | 2852 | break; |
49460fe6 | 2853 | case '\003': /* ^C */ |
f2338a2e | 2854 | PL_minus_c = cBOOL(SvIV(sv)); |
49460fe6 NIS |
2855 | break; |
2856 | ||
79072805 | 2857 | case '\004': /* ^D */ |
b4ab917c | 2858 | #ifdef DEBUGGING |
a9e2d2bf DM |
2859 | { |
2860 | const char *s = SvPV_nolen_const(sv); | |
2861 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2862 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2863 | dump_all_perl(!DEBUG_B_TEST); | |
2864 | } | |
b4ab917c | 2865 | #else |
38ab35f8 | 2866 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2867 | #endif |
79072805 | 2868 | break; |
28f23441 | 2869 | case '\005': /* ^E */ |
d0063567 | 2870 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2871 | #ifdef VMS |
38ab35f8 | 2872 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2873 | #elif defined(WIN32) |
d0063567 | 2874 | SetLastError( SvIV(sv) ); |
2abc681d | 2875 | #elif defined(OS2) |
38ab35f8 | 2876 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2877 | #else |
d0063567 | 2878 | /* will anyone ever use this? */ |
38ab35f8 | 2879 | SETERRNO(SvIV(sv), 4); |
22fae026 | 2880 | #endif |
d0063567 | 2881 | } |
fd503f5c DIM |
2882 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) |
2883 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); | |
d0063567 | 2884 | break; |
79072805 | 2885 | case '\006': /* ^F */ |
9f601cf3 TC |
2886 | if (mg->mg_ptr[1] == '\0') { |
2887 | PL_maxsysfd = SvIV(sv); | |
2888 | } | |
79072805 | 2889 | break; |
a0d0e21e | 2890 | case '\010': /* ^H */ |
efa571ab KW |
2891 | { |
2892 | U32 save_hints = PL_hints; | |
5d382c25 | 2893 | PL_hints = SvUV(sv); |
efa571ab KW |
2894 | |
2895 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2896 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2897 | notify_parser_that_changed_to_utf8(); | |
2898 | } | |
2899 | } | |
a0d0e21e | 2900 | break; |
9d116dd7 | 2901 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
43c5f42d | 2902 | Safefree(PL_inplace); |
bd61b366 | 2903 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; |
da78da6e | 2904 | break; |
d9bad346 FC |
2905 | case '\016': /* ^N */ |
2906 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) | |
2907 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2908 | goto croakparen; | |
28f23441 | 2909 | case '\017': /* ^O */ |
ac27b0f5 | 2910 | if (*(mg->mg_ptr+1) == '\0') { |
43c5f42d | 2911 | Safefree(PL_osname); |
bd61b366 | 2912 | PL_osname = NULL; |
3511154c DM |
2913 | if (SvOK(sv)) { |
2914 | TAINT_PROPER("assigning to $^O"); | |
2e0de35c | 2915 | PL_osname = savesvpv(sv); |
3511154c | 2916 | } |
ac27b0f5 NIS |
2917 | } |
2918 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
8b850bd5 NC |
2919 | STRLEN len; |
2920 | const char *const start = SvPV(sv, len); | |
b54fc2b6 | 2921 | const char *out = (const char*)memchr(start, '\0', len); |
8b850bd5 | 2922 | SV *tmp; |
8b850bd5 NC |
2923 | |
2924 | ||
2925 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
f747ebd6 | 2926 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; |
8b850bd5 NC |
2927 | |
2928 | /* Opening for input is more common than opening for output, so | |
2929 | ensure that hints for input are sooner on linked list. */ | |
59cd0e26 | 2930 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, |
f747ebd6 Z |
2931 | SvUTF8(sv)) |
2932 | : newSVpvs_flags("", SvUTF8(sv)); | |
2933 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2934 | mg_set(tmp); | |
8b850bd5 | 2935 | |
f747ebd6 Z |
2936 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, |
2937 | SvUTF8(sv)); | |
2938 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2939 | mg_set(tmp); | |
ac27b0f5 | 2940 | } |
28f23441 | 2941 | break; |
79072805 | 2942 | case '\020': /* ^P */ |
2fdbfb4d AB |
2943 | PL_perldb = SvIV(sv); |
2944 | if (PL_perldb && !PL_DBsingle) | |
2945 | init_debugger(); | |
9b9e0be4 | 2946 | break; |
79072805 | 2947 | case '\024': /* ^T */ |
88e89b8a | 2948 | #ifdef BIG_TIME |
6b88bc9c | 2949 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 2950 | #else |
38ab35f8 | 2951 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 2952 | #endif |
79072805 | 2953 | break; |
e07ea26a NC |
2954 | case '\025': /* ^UTF8CACHE */ |
2955 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { | |
2956 | PL_utf8cache = (signed char) sv_2iv(sv); | |
2957 | } | |
2958 | break; | |
fde18df1 | 2959 | case '\027': /* ^W & $^WARNING_BITS */ |
4438c4b7 JH |
2960 | if (*(mg->mg_ptr+1) == '\0') { |
2961 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
38ab35f8 | 2962 | i = SvIV(sv); |
ac27b0f5 | 2963 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) |
0453d815 | 2964 | | (i ? G_WARN_ON : G_WARN_OFF) ; |
4438c4b7 | 2965 | } |
599cee73 | 2966 | } |
0a378802 | 2967 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { |
4438c4b7 | 2968 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { |
7e4f0450 | 2969 | if (!SvPOK(sv)) { |
1943af61 | 2970 | free_and_set_cop_warnings(&PL_compiling, pWARN_STD); |
d775746e GS |
2971 | break; |
2972 | } | |
f4fc7782 | 2973 | { |
b5477537 | 2974 | STRLEN len, i; |
006c1a1d Z |
2975 | int not_none = 0, not_all = 0; |
2976 | const U8 * const ptr = (const U8 *)SvPV_const(sv, len) ; | |
f4fc7782 | 2977 | for (i = 0 ; i < len ; ++i) { |
006c1a1d Z |
2978 | not_none |= ptr[i]; |
2979 | not_all |= ptr[i] ^ 0x55; | |
f4fc7782 | 2980 | } |
006c1a1d | 2981 | if (!not_none) { |
1943af61 | 2982 | free_and_set_cop_warnings(&PL_compiling, pWARN_NONE); |
006c1a1d | 2983 | } else if (len >= WARNsize && !not_all) { |
1943af61 | 2984 | free_and_set_cop_warnings(&PL_compiling, pWARN_ALL); |
94c8b9c1 N |
2985 | PL_dowarn |= G_WARN_ONCE ; |
2986 | } | |
2987 | else { | |
2988 | STRLEN len; | |
2989 | const char *const p = SvPV_const(sv, len); | |
2990 | ||
2991 | PL_compiling.cop_warnings | |
2992 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, | |
72dc9ed5 NC |
2993 | p, len); |
2994 | ||
94c8b9c1 | 2995 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
d3a7d8c7 | 2996 | PL_dowarn |= G_WARN_ONCE ; |
94c8b9c1 | 2997 | } |
f4fc7782 | 2998 | |
d3a7d8c7 | 2999 | } |
4438c4b7 | 3000 | } |
971a9dd3 | 3001 | } |
8ca2a5d6 DD |
3002 | #ifdef WIN32 |
3003 | else if (strEQ(mg->mg_ptr+1, "IN32_SLOPPY_STAT")) { | |
4737815a | 3004 | w32_sloppystat = SvTRUE(sv); |
8ca2a5d6 DD |
3005 | } |
3006 | #endif | |
79072805 LW |
3007 | break; |
3008 | case '.': | |
3280af22 NIS |
3009 | if (PL_localizing) { |
3010 | if (PL_localizing == 1) | |
7766f137 | 3011 | SAVESPTR(PL_last_in_gv); |
748a9306 | 3012 | } |
3280af22 | 3013 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) |
632db599 | 3014 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); |
79072805 LW |
3015 | break; |
3016 | case '^': | |
acbe1b9d | 3017 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3018 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3019 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3020 | break; |
3021 | case '~': | |
acbe1b9d | 3022 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3023 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3024 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3025 | break; |
3026 | case '=': | |
acbe1b9d | 3027 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3028 | break; |
3029 | case '-': | |
acbe1b9d FC |
3030 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3031 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
099be4f1 | 3032 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; |
79072805 LW |
3033 | break; |
3034 | case '%': | |
acbe1b9d | 3035 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3036 | break; |
3037 | case '|': | |
4b65379b | 3038 | { |
099be4f1 | 3039 | IO * const io = GvIO(PL_defoutgv); |
720f287d AB |
3040 | if(!io) |
3041 | break; | |
38ab35f8 | 3042 | if ((SvIV(sv)) == 0) |
4b65379b CS |
3043 | IoFLAGS(io) &= ~IOf_FLUSH; |
3044 | else { | |
3045 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
3046 | PerlIO *ofp = IoOFP(io); | |
3047 | if (ofp) | |
3048 | (void)PerlIO_flush(ofp); | |
3049 | IoFLAGS(io) |= IOf_FLUSH; | |
3050 | } | |
3051 | } | |
79072805 LW |
3052 | } |
3053 | break; | |
79072805 | 3054 | case '/': |
1ab48e3a | 3055 | { |
1ab48e3a | 3056 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3057 | SV *referent = SvRV(sv); |
3058 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3059 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3060 | * the alternative is to copy pretty much the entire | |
3061 | * sv_reftype() into this routine, or to do a full string | |
3062 | * comparison on the return of sv_reftype() both of which | |
3063 | * make me feel worse! NOTE, do not modify this comment | |
3064 | * without reviewing the corresponding comment in | |
3065 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3066 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3067 | IV val = SvIV(referent); |
1ab48e3a | 3068 | if (val <= 0) { |
520b6fb6 DIM |
3069 | sv_setsv(sv, PL_rs); |
3070 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3071 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3072 | } |
3073 | } else { | |
ddce084a | 3074 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3075 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3076 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3077 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3078 | } |
3079 | } | |
b3a2acfa | 3080 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3081 | PL_rs = newSVsv(sv); |
b3a2acfa | 3082 | } |
79072805 LW |
3083 | break; |
3084 | case '\\': | |
ef8d46e8 | 3085 | SvREFCNT_dec(PL_ors_sv); |
6bc2995b | 3086 | if (SvOK(sv)) { |
7889fe52 | 3087 | PL_ors_sv = newSVsv(sv); |
009c130f | 3088 | } |
e3c19b7b | 3089 | else { |
a0714e2c | 3090 | PL_ors_sv = NULL; |
e3c19b7b | 3091 | } |
79072805 | 3092 | break; |
7d69d4a6 FC |
3093 | case '[': |
3094 | if (SvIV(sv) != 0) | |
3095 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3096 | break; | |
79072805 | 3097 | case '?': |
ff0cee69 | 3098 | #ifdef COMPLEX_STATUS |
6b88bc9c | 3099 | if (PL_localizing == 2) { |
41cb7b2b | 3100 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
3101 | PL_statusvalue = LvTARGOFF(sv); |
3102 | PL_statusvalue_vms = LvTARGLEN(sv); | |
ff0cee69 | 3103 | } |
3104 | else | |
3105 | #endif | |
3106 | #ifdef VMSISH_STATUS | |
3107 | if (VMSISH_STATUS) | |
fb38d079 | 3108 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); |
ff0cee69 | 3109 | else |
3110 | #endif | |
38ab35f8 | 3111 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
79072805 LW |
3112 | break; |
3113 | case '!': | |
93189314 JH |
3114 | { |
3115 | #ifdef VMS | |
3116 | # define PERL_VMS_BANG vaxc$errno | |
3117 | #else | |
3118 | # define PERL_VMS_BANG 0 | |
3119 | #endif | |
79c32fc2 | 3120 | #if defined(WIN32) |
c9beaf97 SH |
3121 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3122 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
3123 | #else | |
91487cfc | 3124 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
93189314 | 3125 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); |
c9beaf97 | 3126 | #endif |
93189314 | 3127 | } |
79072805 LW |
3128 | break; |
3129 | case '<': | |
985213f2 | 3130 | { |
b469f1e0 | 3131 | /* XXX $< currently silently ignores failures */ |
dfff4baf | 3132 | const Uid_t new_uid = SvUID(sv); |
985213f2 | 3133 | PL_delaymagic_uid = new_uid; |
3280af22 NIS |
3134 | if (PL_delaymagic) { |
3135 | PL_delaymagic |= DM_RUID; | |
79072805 LW |
3136 | break; /* don't do magic till later */ |
3137 | } | |
3138 | #ifdef HAS_SETRUID | |
b469f1e0 | 3139 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3140 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3141 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3142 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3143 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3144 | #else |
985213f2 | 3145 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3146 | # ifdef PERL_DARWIN |
75870ed3 | 3147 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
985213f2 | 3148 | if (new_uid != 0 && PerlProc_getuid() == 0) |
b469f1e0 | 3149 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3150 | # endif |
b469f1e0 | 3151 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
75870ed3 | 3152 | } else { |
cea2e8a9 | 3153 | Perl_croak(aTHX_ "setruid() not implemented"); |
a0d0e21e | 3154 | } |
79072805 | 3155 | #endif |
79072805 | 3156 | break; |
985213f2 | 3157 | } |
79072805 | 3158 | case '>': |
985213f2 | 3159 | { |
b469f1e0 | 3160 | /* XXX $> currently silently ignores failures */ |
dfff4baf | 3161 | const Uid_t new_euid = SvUID(sv); |
985213f2 | 3162 | PL_delaymagic_euid = new_euid; |
3280af22 NIS |
3163 | if (PL_delaymagic) { |
3164 | PL_delaymagic |= DM_EUID; | |
79072805 LW |
3165 | break; /* don't do magic till later */ |
3166 | } | |
3167 | #ifdef HAS_SETEUID | |
b469f1e0 | 3168 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3169 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3170 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3171 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3172 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3173 | #else |
985213f2 | 3174 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
b469f1e0 | 3175 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); |
a0d0e21e | 3176 | else { |
cea2e8a9 | 3177 | Perl_croak(aTHX_ "seteuid() not implemented"); |
a0d0e21e | 3178 | } |
79072805 | 3179 | #endif |
79072805 | 3180 | break; |
985213f2 | 3181 | } |
79072805 | 3182 | case '(': |
985213f2 | 3183 | { |
b469f1e0 | 3184 | /* XXX $( currently silently ignores failures */ |
dfff4baf | 3185 | const Gid_t new_gid = SvGID(sv); |
985213f2 | 3186 | PL_delaymagic_gid = new_gid; |
3280af22 NIS |
3187 | if (PL_delaymagic) { |
3188 | PL_delaymagic |= DM_RGID; | |
79072805 LW |
3189 | break; /* don't do magic till later */ |
3190 | } | |
3191 | #ifdef HAS_SETRGID | |
b469f1e0 | 3192 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3193 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3194 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3195 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3196 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3197 | #else |
985213f2 | 3198 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
b469f1e0 | 3199 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); |
748a9306 | 3200 | else { |
cea2e8a9 | 3201 | Perl_croak(aTHX_ "setrgid() not implemented"); |
748a9306 | 3202 | } |
79072805 | 3203 | #endif |
79072805 | 3204 | break; |
985213f2 | 3205 | } |
79072805 | 3206 | case ')': |
985213f2 | 3207 | { |
0635704a HS |
3208 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3209 | * but you can override it if you need to. | |
3210 | */ | |
3211 | #ifndef INVALID_GID | |
3212 | #define INVALID_GID ((Gid_t)-1) | |
3213 | #endif | |
b469f1e0 | 3214 | /* XXX $) currently silently ignores failures */ |
dfff4baf | 3215 | Gid_t new_egid; |
5cd24f17 | 3216 | #ifdef HAS_SETGROUPS |
3217 | { | |
b83604b4 | 3218 | const char *p = SvPV_const(sv, len); |
757f63d8 | 3219 | Groups_t *gary = NULL; |
79e302e6 MM |
3220 | const char* p_end = p + len; |
3221 | const char* endptr = p_end; | |
22ff3130 | 3222 | UV uv; |
fb4089e0 | 3223 | #ifdef _SC_NGROUPS_MAX |
3224 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3225 | ||
3226 | if (maxgrp < 0) | |
3227 | maxgrp = NGROUPS; | |
3228 | #else | |
3229 | int maxgrp = NGROUPS; | |
3230 | #endif | |
757f63d8 SP |
3231 | |
3232 | while (isSPACE(*p)) | |
3233 | ++p; | |
22ff3130 HS |
3234 | if (grok_atoUV(p, &uv, &endptr)) |
3235 | new_egid = (Gid_t)uv; | |
3236 | else { | |
0635704a | 3237 | new_egid = INVALID_GID; |
22ff3130 HS |
3238 | endptr = NULL; |
3239 | } | |
fb4089e0 | 3240 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3241 | if (endptr == NULL) |
3242 | break; | |
3243 | p = endptr; | |
79e302e6 | 3244 | endptr = p_end; |
757f63d8 SP |
3245 | while (isSPACE(*p)) |
3246 | ++p; | |
3247 | if (!*p) | |
3248 | break; | |
fdadaf77 | 3249 | if (!gary) |
757f63d8 SP |
3250 | Newx(gary, i + 1, Groups_t); |
3251 | else | |
3252 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3253 | if (grok_atoUV(p, &uv, &endptr)) |
3254 | gary[i] = (Groups_t)uv; | |
3255 | else { | |
0635704a | 3256 | gary[i] = INVALID_GID; |
22ff3130 HS |
3257 | endptr = NULL; |
3258 | } | |
757f63d8 SP |
3259 | } |
3260 | if (i) | |
b469f1e0 | 3261 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
f5a63d97 | 3262 | Safefree(gary); |
5cd24f17 | 3263 | } |
3264 | #else /* HAS_SETGROUPS */ | |
dfff4baf | 3265 | new_egid = SvGID(sv); |
5cd24f17 | 3266 | #endif /* HAS_SETGROUPS */ |
985213f2 | 3267 | PL_delaymagic_egid = new_egid; |
3280af22 NIS |
3268 | if (PL_delaymagic) { |
3269 | PL_delaymagic |= DM_EGID; | |
79072805 LW |
3270 | break; /* don't do magic till later */ |
3271 | } | |
3272 | #ifdef HAS_SETEGID | |
b469f1e0 | 3273 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3274 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3275 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3276 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3277 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3278 | #else |
985213f2 | 3279 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
b469f1e0 | 3280 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); |
748a9306 | 3281 | else { |
cea2e8a9 | 3282 | Perl_croak(aTHX_ "setegid() not implemented"); |
748a9306 | 3283 | } |
79072805 | 3284 | #endif |
79072805 | 3285 | break; |
985213f2 | 3286 | } |
79072805 | 3287 | case ':': |
2d8e6c8d | 3288 | PL_chopset = SvPV_force(sv,len); |
79072805 | 3289 | break; |
9cdac2a2 FC |
3290 | case '$': /* $$ */ |
3291 | /* Store the pid in mg->mg_obj so we can tell when a fork has | |
3292 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3293 | if (isGV(mg->mg_obj)) { | |
3294 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3295 | SvREFCNT_dec(mg->mg_obj); | |
3296 | mg->mg_flags |= MGf_REFCOUNTED; | |
3297 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3298 | } | |
3299 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3300 | break; | |
79072805 | 3301 | case '0': |
e2975953 | 3302 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3303 | S_set_dollarzero(aTHX_ sv); |
e2975953 | 3304 | UNLOCK_DOLLARZERO_MUTEX; |
79072805 LW |
3305 | break; |
3306 | } | |
3307 | return 0; | |
3308 | } | |
3309 | ||
ea81552b KW |
3310 | /* |
3311 | =for apidoc_section Signals | |
3312 | =for apidoc whichsig | |
3313 | =for apidoc_item whichsig_pv | |
3314 | =for apidoc_item whichsig_pvn | |
3315 | =for apidoc_item whichsig_sv | |
3316 | ||
3317 | These all convert a signal name into its corresponding signal number; | |
3318 | returning -1 if no corresponding number was found. | |
3319 | ||
3320 | They differ only in the source of the signal name: | |
3321 | ||
3322 | C<whichsig_pv> takes the name from the C<NUL>-terminated string starting at | |
3323 | C<sig>. | |
3324 | ||
3325 | C<whichsig> is merely a different spelling, a synonym, of C<whichsig_pv>. | |
3326 | ||
3327 | C<whichsig_pvn> takes the name from the string starting at C<sig>, with length | |
3328 | C<len> bytes. | |
3329 | ||
3330 | C<whichsig_sv> takes the name from the PV stored in the SV C<sigsv>. | |
3331 | ||
3332 | =cut | |
3333 | */ | |
3334 | ||
79072805 | 3335 | I32 |
84c7b88c BF |
3336 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3337 | { | |
3338 | const char *sigpv; | |
3339 | STRLEN siglen; | |
3340 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3341 | sigpv = SvPV_const(sigsv, siglen); |
3342 | return whichsig_pvn(sigpv, siglen); | |
3343 | } | |
3344 | ||
3345 | I32 | |
3346 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3347 | { | |
3348 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3349 | return whichsig_pvn(sig, strlen(sig)); |
3350 | } | |
3351 | ||
3352 | I32 | |
3353 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3354 | { |
eb578fdb | 3355 | char* const* sigv; |
7918f24d | 3356 | |
84c7b88c | 3357 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3358 | PERL_UNUSED_CONTEXT; |
79072805 | 3359 | |
aadb217d | 3360 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
84c7b88c | 3361 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
aadb217d | 3362 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; |
79072805 | 3363 | #ifdef SIGCLD |
84c7b88c | 3364 | if (memEQs(sig, len, "CHLD")) |
79072805 LW |
3365 | return SIGCLD; |
3366 | #endif | |
3367 | #ifdef SIGCHLD | |
84c7b88c | 3368 | if (memEQs(sig, len, "CLD")) |
79072805 LW |
3369 | return SIGCHLD; |
3370 | #endif | |
7f1236c0 | 3371 | return -1; |
79072805 LW |
3372 | } |
3373 | ||
dc37125b DM |
3374 | |
3375 | /* Perl_sighandler(), Perl_sighandler1(), Perl_sighandler3(): | |
3376 | * these three function are intended to be called by the OS as 'C' level | |
3377 | * signal handler functions in the case where unsafe signals are being | |
3378 | * used - i.e. they immediately invoke Perl_perly_sighandler() to call the | |
3379 | * perl-level sighandler, rather than deferring. | |
3380 | * In fact, the core itself will normally use Perl_csighandler as the | |
3381 | * OS-level handler; that function will then decide whether to queue the | |
3382 | * signal or call Perl_sighandler / Perl_perly_sighandler itself. So these | |
3383 | * functions are more useful for e.g. POSIX.xs when it wants explicit | |
3384 | * control of what's happening. | |
3385 | */ | |
3386 | ||
3387 | ||
5e7940ce | 3388 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b DM |
3389 | |
3390 | Signal_t | |
e7124897 | 3391 | Perl_sighandler(int sig, Siginfo_t *sip, void *uap) |
8a5e470b DM |
3392 | { |
3393 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3394 | } | |
3395 | ||
1e82f5a6 | 3396 | #else |
8a5e470b DM |
3397 | |
3398 | Signal_t | |
1e82f5a6 | 3399 | Perl_sighandler(int sig) |
8a5e470b DM |
3400 | { |
3401 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3402 | } | |
3403 | ||
1e82f5a6 | 3404 | #endif |
8a5e470b | 3405 | |
dc37125b DM |
3406 | Signal_t |
3407 | Perl_sighandler1(int sig) | |
3408 | { | |
3409 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3410 | } | |
3411 | ||
3412 | Signal_t | |
3413 | Perl_sighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
3414 | { | |
3415 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3416 | } | |
3417 | ||
3418 | ||
8a5e470b DM |
3419 | /* Invoke the perl-level signal handler. This function is called either |
3420 | * directly from one of the C-level signals handlers (Perl_sighandler or | |
3421 | * Perl_csighandler), or for safe signals, later from | |
3422 | * Perl_despatch_signals() at a suitable safe point during execution. | |
3423 | * | |
3424 | * 'safe' is a boolean indicating the latter call path. | |
3425 | */ | |
3426 | ||
3427 | Signal_t | |
3428 | Perl_perly_sighandler(int sig, Siginfo_t *sip PERL_UNUSED_DECL, | |
3429 | void *uap PERL_UNUSED_DECL, bool safe) | |
79072805 | 3430 | { |
1018e26f NIS |
3431 | #ifdef PERL_GET_SIG_CONTEXT |
3432 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3433 | #else |
cea2e8a9 | 3434 | dTHX; |
71d280e3 | 3435 | #endif |
79072805 | 3436 | dSP; |
a0714e2c SS |
3437 | GV *gv = NULL; |
3438 | SV *sv = NULL; | |
8772537c | 3439 | SV * const tSv = PL_Sv; |
601f1833 | 3440 | CV *cv = NULL; |
533c011a | 3441 | OP *myop = PL_op; |
84902520 | 3442 | U32 flags = 0; |
8772537c | 3443 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3444 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3445 | SV *errsv_save = NULL; |
71d280e3 | 3446 | |
84902520 | 3447 | |
727405f8 | 3448 | if (!PL_psig_ptr[sig]) { |
99ef548b | 3449 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
727405f8 NIS |
3450 | PL_sig_name[sig]); |
3451 | exit(sig); | |
3452 | } | |
ff0cee69 | 3453 | |
a0d63a7b DM |
3454 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3455 | /* Max number of items pushed there is 3*n or 4. We cannot fix | |
3456 | infinity, so we fix 4 (in fact 5): */ | |
3457 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3458 | flags |= 1; | |
3459 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3460 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3461 | } | |
84902520 | 3462 | } |
84902520 | 3463 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3464 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
8772537c AL |
3465 | || SvTYPE(cv) != SVt_PVCV) { |
3466 | HV *st; | |
f2c0649b | 3467 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); |
8772537c | 3468 | } |
84902520 | 3469 | |
a0d0e21e | 3470 | if (!cv || !CvROOT(cv)) { |
07c325bb | 3471 | const HEK * const hek = gv |
1d6bb9ae FC |
3472 | ? GvENAME_HEK(gv) |
3473 | : cv && CvNAMED(cv) | |
3474 | ? CvNAME_HEK(cv) | |
07c325bb FC |
3475 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; |
3476 | if (hek) | |
3477 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
147e3846 | 3478 | "SIG%s handler \"%" HEKf "\" not defined.\n", |
ac892e4a | 3479 | PL_sig_name[sig], HEKfARG(hek)); |
07c325bb FC |
3480 | /* diag_listed_as: SIG%s handler "%s" not defined */ |
3481 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3482 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3483 | PL_sig_name[sig]); | |
00d579c5 | 3484 | goto cleanup; |
79072805 LW |
3485 | } |
3486 | ||
0c4d3b5e DM |
3487 | sv = PL_psig_name[sig] |
3488 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) | |
3489 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3490 | flags |= 8; |
0c4d3b5e DM |
3491 | SAVEFREESV(sv); |
3492 | ||
a0d63a7b DM |
3493 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3494 | /* make sure our assumption about the size of the SAVEs are correct: | |
3495 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3496 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
3497 | } | |
e336de0d | 3498 | |
e788e7d3 | 3499 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3500 | PUSHMARK(SP); |
79072805 | 3501 | PUSHs(sv); |
dc43527e | 3502 | |
8aad04aa JH |
3503 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3504 | { | |
3505 | struct sigaction oact; | |
3506 | ||
fff75fa7 | 3507 | if (sip && sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { |
dc43527e DM |
3508 | HV *sih = newHV(); |
3509 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); | |
3510 | /* The siginfo fields signo, code, errno, pid, uid, | |
3511 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
3512 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); | |
3513 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
3514 | # ifdef HAS_SIGINFO_SI_ERRNO | |
3515 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3516 | # endif | |
3517 | # ifdef HAS_SIGINFO_SI_STATUS | |
3518 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3519 | # endif | |
3520 | # ifdef HAS_SIGINFO_SI_UID | |
3521 | { | |
3522 | SV *uid = newSV(0); | |
3523 | sv_setuid(uid, sip->si_uid); | |
3524 | (void)hv_stores(sih, "uid", uid); | |
3525 | } | |
3526 | # endif | |
3527 | # ifdef HAS_SIGINFO_SI_PID | |
3528 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3529 | # endif | |
3530 | # ifdef HAS_SIGINFO_SI_ADDR | |
3531 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3532 | # endif | |
3533 | # ifdef HAS_SIGINFO_SI_BAND | |
3534 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
3535 | # endif | |
3536 | EXTEND(SP, 2); | |
3537 | PUSHs(rv); | |
3538 | mPUSHp((char *)sip, sizeof(*sip)); | |
b4552a27 | 3539 | |
8aad04aa JH |
3540 | } |
3541 | } | |
3542 | #endif | |
dc43527e | 3543 | |
79072805 | 3544 | PUTBACK; |
a0d0e21e | 3545 | |
100c03aa JL |
3546 | errsv_save = newSVsv(ERRSV); |
3547 | ||
ad64d0ec | 3548 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3549 | |
d3acc0f7 | 3550 | POPSTACK; |
eed484f9 DD |
3551 | { |
3552 | SV * const errsv = ERRSV; | |
3553 | if (SvTRUE_NN(errsv)) { | |
3554 | SvREFCNT_dec(errsv_save); | |
dc43527e | 3555 | |
c22d665b | 3556 | #ifndef PERL_MICRO |
dc43527e DM |
3557 | /* Handler "died", for example to get out of a restart-able read(). |
3558 | * Before we re-do that on its behalf re-enable the signal which was | |
3559 | * blocked by the system when we entered. | |
3560 | */ | |
3561 | # ifdef HAS_SIGPROCMASK | |
8a5e470b DM |
3562 | if (!safe) { |
3563 | /* safe signals called via dispatch_signals() set up a | |
3564 | * savestack destructor, unblock_sigmask(), to | |
3565 | * automatically unblock the handler at the end. If | |
3566 | * instead we get here directly, we have to do it | |
3567 | * ourselves | |
3568 | */ | |
eed484f9 DD |
3569 | sigset_t set; |
3570 | sigemptyset(&set); | |
3571 | sigaddset(&set,sig); | |
3572 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3573 | } | |
dc43527e | 3574 | # else |
eed484f9 | 3575 | /* Not clear if this will work */ |
8a5e470b DM |
3576 | /* XXX not clear if this should be protected by 'if (safe)' |
3577 | * too */ | |
3578 | ||
eed484f9 DD |
3579 | (void)rsignal(sig, SIG_IGN); |
3580 | (void)rsignal(sig, PL_csighandlerp); | |
dc43527e | 3581 | # endif |
c22d665b | 3582 | #endif /* !PERL_MICRO */ |
dc43527e | 3583 | |
eed484f9 DD |
3584 | die_sv(errsv); |
3585 | } | |
3586 | else { | |
3587 | sv_setsv(errsv, errsv_save); | |
3588 | SvREFCNT_dec(errsv_save); | |
3589 | } | |
100c03aa JL |
3590 | } |
3591 | ||
7b52d656 | 3592 | cleanup: |
0c4d3b5e DM |
3593 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3594 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3595 | if (flags & 8) |
2357bae7 | 3596 | SvREFCNT_dec_NN(sv); |
533c011a | 3597 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3598 | |
3280af22 NIS |
3599 | PL_Sv = tSv; /* Restore global temporaries. */ |
3600 | PL_Xpv = tXpv; | |
53bb94e2 | 3601 | return; |
79072805 | 3602 | } |
4e35701f NIS |
3603 | |
3604 | ||
51371543 | 3605 | static void |
8772537c | 3606 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3607 | { |
8772537c AL |
3608 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3609 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3610 | bool bumped; |
51371543 GS |
3611 | |
3612 | if (!sv) | |
3613 | return; | |
3614 | ||
4bac9ae4 CS |
3615 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
3616 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ | |
a623f893 FC |
3617 | if (mgs->mgs_flags) |
3618 | SvFLAGS(sv) |= mgs->mgs_flags; | |
51371543 GS |
3619 | else |
3620 | mg_magical(sv); | |
51371543 GS |
3621 | } |
3622 | ||
150b625d | 3623 | bumped = mgs->mgs_bumped; |
51371543 GS |
3624 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3625 | ||
3626 | /* If we're still on top of the stack, pop us off. (That condition | |
3627 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3628 | * if it's being called via leave_scope.) | |
3629 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3630 | * may leave alloc gunk on the savestack, and some code | |
3631 | * (e.g. sighandler) doesn't expect that... | |
3632 | */ | |
3633 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3634 | { | |
1be36ce0 NC |
3635 | UV popval = SSPOPUV; |
3636 | assert(popval == SAVEt_DESTRUCTOR_X); | |
51371543 | 3637 | PL_savestack_ix -= 2; |
1be36ce0 NC |
3638 | popval = SSPOPUV; |
3639 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); | |
3640 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3641 | } |
150b625d DM |
3642 | if (bumped) { |
3643 | if (SvREFCNT(sv) == 1) { | |
3644 | /* We hold the last reference to this SV, which implies that the | |
3645 | SV was deleted as a side effect of the routines we called. | |
3646 | So artificially keep it alive a bit longer. | |
3647 | We avoid turning on the TEMP flag, which can cause the SV's | |
3648 | buffer to get stolen (and maybe other stuff). */ | |
150b625d | 3649 | sv_2mortal(sv); |
4bac9ae4 | 3650 | SvTEMP_off(sv); |
8985fe98 | 3651 | } |
150b625d | 3652 | else |
2357bae7 | 3653 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ |
8985fe98 | 3654 | } |
51371543 GS |
3655 | } |
3656 | ||
0c4d3b5e DM |
3657 | /* clean up the mess created by Perl_sighandler(). |
3658 | * Note that this is only called during an exit in a signal handler; | |
3659 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3660 | * skipped over. */ |
0c4d3b5e | 3661 | |
51371543 | 3662 | static void |
8772537c | 3663 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3664 | { |
0c4d3b5e | 3665 | PERL_UNUSED_ARG(p); |
7918f24d | 3666 | |
0c4d3b5e | 3667 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3668 | } |
1018e26f | 3669 | |
66610fdd | 3670 | /* |
51b56f5c | 3671 | =for apidoc_section Magic |
b3ca2e83 NC |
3672 | =for apidoc magic_sethint |
3673 | ||
796b6530 | 3674 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3675 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3676 | anything that would need a deep copy. Maybe we should warn if we find a | |
3677 | reference. | |
b3ca2e83 NC |
3678 | |
3679 | =cut | |
3680 | */ | |
3681 | int | |
3682 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3683 | { | |
ad64d0ec | 3684 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
59cd0e26 | 3685 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3686 | |
7918f24d NC |
3687 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3688 | ||
e6e3e454 NC |
3689 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3690 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3691 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3692 | or take other more complex action. */ | |
3693 | ||
5b9c0671 NC |
3694 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3695 | Doing this here saves a lot of doing it manually in perl code (and | |
3696 | forgetting to do it, and consequent subtle errors. */ | |
3697 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 Z |
3698 | CopHINTHASH_set(&PL_compiling, |
3699 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); | |
b34c1a7e | 3700 | magic_sethint_feature(key, NULL, 0, sv, 0); |
b3ca2e83 NC |
3701 | return 0; |
3702 | } | |
3703 | ||
3704 | /* | |
f175cff5 | 3705 | =for apidoc magic_clearhint |
b3ca2e83 | 3706 | |
796b6530 | 3707 | Triggered by a delete from C<%^H>, records the key to |
c28fe1ec | 3708 | C<PL_compiling.cop_hints_hash>. |
b3ca2e83 NC |
3709 | |
3710 | =cut | |
3711 | */ | |
3712 | int | |
3713 | Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg) | |
3714 | { | |
7918f24d | 3715 | PERL_ARGS_ASSERT_MAGIC_CLEARHINT; |
f5a63d97 AL |
3716 | PERL_UNUSED_ARG(sv); |
3717 | ||
5b9c0671 | 3718 | PL_hints |= HINT_LOCALIZE_HH; |
20439bc7 | 3719 | CopHINTHASH_set(&PL_compiling, |
e3352591 FC |
3720 | mg->mg_len == HEf_SVKEY |
3721 | ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling), | |
3722 | MUTABLE_SV(mg->mg_ptr), 0, 0) | |
3723 | : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling), | |
3724 | mg->mg_ptr, mg->mg_len, 0, 0)); | |
b34c1a7e TC |
3725 | if (mg->mg_len == HEf_SVKEY) |
3726 | magic_sethint_feature(MUTABLE_SV(mg->mg_ptr), NULL, 0, NULL, FALSE); | |
3727 | else | |
3728 | magic_sethint_feature(NULL, mg->mg_ptr, mg->mg_len, NULL, FALSE); | |
b3ca2e83 NC |
3729 | return 0; |
3730 | } | |
3731 | ||
3732 | /* | |
f747ebd6 Z |
3733 | =for apidoc magic_clearhints |
3734 | ||
796b6530 | 3735 | Triggered by clearing C<%^H>, resets C<PL_compiling.cop_hints_hash>. |
f747ebd6 Z |
3736 | |
3737 | =cut | |
3738 | */ | |
3739 | int | |
3740 | Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg) | |
3741 | { | |
3742 | PERL_ARGS_ASSERT_MAGIC_CLEARHINTS; | |
3743 | PERL_UNUSED_ARG(sv); | |
3744 | PERL_UNUSED_ARG(mg); | |
20439bc7 Z |
3745 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
3746 | CopHINTHASH_set(&PL_compiling, cophh_new_empty()); | |
b34c1a7e | 3747 | CLEARFEATUREBITS(); |
f747ebd6 Z |
3748 | return 0; |
3749 | } | |
3750 | ||
09fb282d FC |
3751 | int |
3752 | Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv, | |
3753 | const char *name, I32 namlen) | |
3754 | { | |
3755 | MAGIC *nmg; | |
3756 | ||
3757 | PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER; | |
4f8dbb2d | 3758 | PERL_UNUSED_ARG(sv); |
09fb282d FC |
3759 | PERL_UNUSED_ARG(name); |
3760 | PERL_UNUSED_ARG(namlen); | |
3761 | ||
3762 | sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0); | |
3763 | nmg = mg_find(nsv, mg->mg_type); | |
316ebaf2 | 3764 | assert(nmg); |
09fb282d FC |
3765 | if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj); |
3766 | nmg->mg_ptr = mg->mg_ptr; | |
3767 | nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj); | |
3768 | nmg->mg_flags |= MGf_REFCOUNTED; | |
3769 | return 1; | |
3770 | } | |
3771 | ||
a6d69523 TC |
3772 | int |
3773 | Perl_magic_setdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3774 | PERL_ARGS_ASSERT_MAGIC_SETDEBUGVAR; | |
3775 | ||
23270f96 DM |
3776 | #if DBVARMG_SINGLE != 0 |
3777 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3778 | #endif | |
3779 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3780 | |
3781 | PL_DBcontrol[mg->mg_private] = SvIV_nomg(sv); | |
3782 | ||
3783 | return 1; | |
3784 | } | |
3785 | ||
3786 | int | |
3787 | Perl_magic_getdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3788 | PERL_ARGS_ASSERT_MAGIC_GETDEBUGVAR; | |
3789 | ||
23270f96 DM |
3790 | #if DBVARMG_SINGLE != 0 |
3791 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3792 | #endif | |
3793 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3794 | sv_setiv(sv, PL_DBcontrol[mg->mg_private]); |
3795 | ||
3796 | return 0; | |
3797 | } | |
3798 | ||
f747ebd6 | 3799 | /* |
14d04a33 | 3800 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3801 | */ |