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 JH |
18 | /* |
19 | =head1 Magical Functions | |
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 | ||
7fefc6c1 KW |
37 | =cut |
38 | ||
ccfc67b7 JH |
39 | */ |
40 | ||
79072805 | 41 | #include "EXTERN.h" |
864dbfa3 | 42 | #define PERL_IN_MG_C |
79072805 LW |
43 | #include "perl.h" |
44 | ||
5cd24f17 | 45 | #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS) |
b7953727 JH |
46 | # ifdef I_GRP |
47 | # include <grp.h> | |
48 | # endif | |
188ea221 CS |
49 | #endif |
50 | ||
757f63d8 SP |
51 | #if defined(HAS_SETGROUPS) |
52 | # ifndef NGROUPS | |
53 | # define NGROUPS 32 | |
54 | # endif | |
55 | #endif | |
56 | ||
17aa7f3d JH |
57 | #ifdef __hpux |
58 | # include <sys/pstat.h> | |
59 | #endif | |
60 | ||
7636ea95 AB |
61 | #ifdef HAS_PRCTL_SET_NAME |
62 | # include <sys/prctl.h> | |
63 | #endif | |
64 | ||
8aad04aa | 65 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
b6455c53 | 66 | Signal_t Perl_csighandler(int sig, siginfo_t *, void *); |
8aad04aa | 67 | #else |
e69880a5 | 68 | Signal_t Perl_csighandler(int sig); |
8aad04aa | 69 | #endif |
e69880a5 | 70 | |
9cffb111 OS |
71 | #ifdef __Lynx__ |
72 | /* Missing protos on LynxOS */ | |
73 | void setruid(uid_t id); | |
74 | void seteuid(uid_t id); | |
75 | void setrgid(uid_t id); | |
76 | void setegid(uid_t id); | |
77 | #endif | |
78 | ||
c07a80fd | 79 | /* |
4bac9ae4 | 80 | * Pre-magic setup and post-magic takedown. |
c07a80fd | 81 | * Use the "DESTRUCTOR" scope cleanup to reinstate magic. |
82 | */ | |
83 | ||
84 | struct magic_state { | |
85 | SV* mgs_sv; | |
455ece5e | 86 | I32 mgs_ss_ix; |
a623f893 | 87 | U32 mgs_flags; |
150b625d | 88 | bool mgs_bumped; |
c07a80fd | 89 | }; |
455ece5e | 90 | /* MGS is typedef'ed to struct magic_state in perl.h */ |
76e3520e GS |
91 | |
92 | STATIC void | |
ff44333e | 93 | S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags) |
c07a80fd | 94 | { |
455ece5e | 95 | MGS* mgs; |
150b625d | 96 | bool bumped = FALSE; |
7918f24d | 97 | |
ff44333e | 98 | PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS; |
7918f24d | 99 | |
4bac9ae4 CS |
100 | assert(SvMAGICAL(sv)); |
101 | ||
150b625d DM |
102 | /* we shouldn't really be called here with RC==0, but it can sometimes |
103 | * happen via mg_clear() (which also shouldn't be called when RC==0, | |
104 | * but it can happen). Handle this case gracefully(ish) by not RC++ | |
105 | * and thus avoiding the resultant double free */ | |
106 | if (SvREFCNT(sv) > 0) { | |
107 | /* guard against sv getting freed midway through the mg clearing, | |
108 | * by holding a private reference for the duration. */ | |
109 | SvREFCNT_inc_simple_void_NN(sv); | |
110 | bumped = TRUE; | |
111 | } | |
8985fe98 | 112 | |
8772537c | 113 | SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix)); |
455ece5e AD |
114 | |
115 | mgs = SSPTR(mgs_ix, MGS*); | |
c07a80fd | 116 | mgs->mgs_sv = sv; |
a623f893 | 117 | mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv); |
455ece5e | 118 | mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */ |
150b625d | 119 | mgs->mgs_bumped = bumped; |
c07a80fd | 120 | |
ff44333e | 121 | SvFLAGS(sv) &= ~flags; |
3805b5fb | 122 | SvREADONLY_off(sv); |
c07a80fd | 123 | } |
124 | ||
ff44333e FC |
125 | #define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG) |
126 | ||
954c1994 GS |
127 | /* |
128 | =for apidoc mg_magical | |
129 | ||
fbe13c60 | 130 | Turns on the magical status of an SV. See C<L</sv_magic>>. |
954c1994 GS |
131 | |
132 | =cut | |
133 | */ | |
134 | ||
8990e307 | 135 | void |
ddeaf645 | 136 | Perl_mg_magical(SV *sv) |
8990e307 | 137 | { |
e1ec3a88 | 138 | const MAGIC* mg; |
7918f24d | 139 | PERL_ARGS_ASSERT_MG_MAGICAL; |
f9c6fee5 CS |
140 | |
141 | SvMAGICAL_off(sv); | |
218787bd | 142 | if ((mg = SvMAGIC(sv))) { |
218787bd VP |
143 | do { |
144 | const MGVTBL* const vtbl = mg->mg_virtual; | |
145 | if (vtbl) { | |
146 | if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP)) | |
147 | SvGMAGICAL_on(sv); | |
148 | if (vtbl->svt_set) | |
149 | SvSMAGICAL_on(sv); | |
150 | if (vtbl->svt_clear) | |
151 | SvRMAGICAL_on(sv); | |
152 | } | |
153 | } while ((mg = mg->mg_moremagic)); | |
154 | if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG))) | |
155 | SvRMAGICAL_on(sv); | |
8990e307 LW |
156 | } |
157 | } | |
158 | ||
954c1994 GS |
159 | /* |
160 | =for apidoc mg_get | |
161 | ||
4b1e7f06 | 162 | Do magic before a value is retrieved from the SV. The type of SV must |
796b6530 | 163 | be >= C<SVt_PVMG>. See C<L</sv_magic>>. |
954c1994 GS |
164 | |
165 | =cut | |
166 | */ | |
167 | ||
79072805 | 168 | int |
864dbfa3 | 169 | Perl_mg_get(pTHX_ SV *sv) |
79072805 | 170 | { |
35a4481c | 171 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
a9844598 | 172 | bool saved = FALSE; |
f9c6fee5 | 173 | bool have_new = 0; |
b949b68f | 174 | bool taint_only = TRUE; /* the only get method seen is taint */ |
ff76feab | 175 | MAGIC *newmg, *head, *cur, *mg; |
6683b158 | 176 | |
7918f24d NC |
177 | PERL_ARGS_ASSERT_MG_GET; |
178 | ||
407287f9 FC |
179 | if (PL_localizing == 1 && sv == DEFSV) return 0; |
180 | ||
ff76feab AMS |
181 | /* We must call svt_get(sv, mg) for each valid entry in the linked |
182 | list of magic. svt_get() may delete the current entry, add new | |
183 | magic to the head of the list, or upgrade the SV. AMS 20010810 */ | |
184 | ||
185 | newmg = cur = head = mg = SvMAGIC(sv); | |
186 | while (mg) { | |
35a4481c | 187 | const MGVTBL * const vtbl = mg->mg_virtual; |
f9c6fee5 | 188 | MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */ |
ff76feab | 189 | |
2b260de0 | 190 | if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) { |
a9844598 CS |
191 | |
192 | /* taint's mg get is so dumb it doesn't need flag saving */ | |
b949b68f DM |
193 | if (mg->mg_type != PERL_MAGIC_taint) { |
194 | taint_only = FALSE; | |
195 | if (!saved) { | |
196 | save_magic(mgs_ix, sv); | |
197 | saved = TRUE; | |
198 | } | |
199 | } | |
a9844598 | 200 | |
16c91539 | 201 | vtbl->svt_get(aTHX_ sv, mg); |
b77f7d40 | 202 | |
58f82c5c DM |
203 | /* guard against magic having been deleted - eg FETCH calling |
204 | * untie */ | |
f9c6fee5 | 205 | if (!SvMAGIC(sv)) { |
a623f893 FC |
206 | /* recalculate flags */ |
207 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
58f82c5c | 208 | break; |
f9c6fee5 | 209 | } |
b77f7d40 | 210 | |
f9c6fee5 | 211 | /* recalculate flags if this entry was deleted. */ |
ff76feab | 212 | if (mg->mg_flags & MGf_GSKIP) |
a623f893 FC |
213 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= |
214 | ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
a0d0e21e | 215 | } |
7d1328bb | 216 | else if (vtbl == &PL_vtbl_utf8) { |
b949b68f DM |
217 | /* get-magic can reallocate the PV, unless there's only taint |
218 | * magic */ | |
219 | if (taint_only) { | |
220 | MAGIC *mg2; | |
221 | for (mg2 = nextmg; mg2; mg2 = mg2->mg_moremagic) { | |
222 | if ( mg2->mg_type != PERL_MAGIC_taint | |
223 | && !(mg2->mg_flags & MGf_GSKIP) | |
224 | && mg2->mg_virtual | |
225 | && mg2->mg_virtual->svt_get | |
226 | ) { | |
227 | taint_only = FALSE; | |
228 | break; | |
229 | } | |
230 | } | |
231 | } | |
232 | if (!taint_only) | |
233 | magic_setutf8(sv, mg); | |
7d1328bb | 234 | } |
ff76feab | 235 | |
f9c6fee5 | 236 | mg = nextmg; |
ff76feab | 237 | |
0723351e | 238 | if (have_new) { |
ff76feab AMS |
239 | /* Have we finished with the new entries we saw? Start again |
240 | where we left off (unless there are more new entries). */ | |
241 | if (mg == head) { | |
0723351e | 242 | have_new = 0; |
ff76feab AMS |
243 | mg = cur; |
244 | head = newmg; | |
245 | } | |
246 | } | |
247 | ||
248 | /* Were any new entries added? */ | |
0723351e NC |
249 | if (!have_new && (newmg = SvMAGIC(sv)) != head) { |
250 | have_new = 1; | |
ff76feab AMS |
251 | cur = mg; |
252 | mg = newmg; | |
a623f893 FC |
253 | /* recalculate flags */ |
254 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
760ac839 | 255 | } |
79072805 | 256 | } |
463ee0b2 | 257 | |
a9844598 CS |
258 | if (saved) |
259 | restore_magic(INT2PTR(void *, (IV)mgs_ix)); | |
260 | ||
79072805 LW |
261 | return 0; |
262 | } | |
263 | ||
954c1994 GS |
264 | /* |
265 | =for apidoc mg_set | |
266 | ||
fbe13c60 | 267 | Do magic after a value is assigned to the SV. See C<L</sv_magic>>. |
954c1994 GS |
268 | |
269 | =cut | |
270 | */ | |
271 | ||
79072805 | 272 | int |
864dbfa3 | 273 | Perl_mg_set(pTHX_ SV *sv) |
79072805 | 274 | { |
35a4481c | 275 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 276 | MAGIC* mg; |
463ee0b2 LW |
277 | MAGIC* nextmg; |
278 | ||
7918f24d NC |
279 | PERL_ARGS_ASSERT_MG_SET; |
280 | ||
b5ed8c44 FC |
281 | if (PL_localizing == 2 && sv == DEFSV) return 0; |
282 | ||
ff44333e | 283 | save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */ |
463ee0b2 LW |
284 | |
285 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { | |
e1ec3a88 | 286 | const MGVTBL* vtbl = mg->mg_virtual; |
463ee0b2 | 287 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
a0d0e21e LW |
288 | if (mg->mg_flags & MGf_GSKIP) { |
289 | mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */ | |
a623f893 | 290 | (SSPTR(mgs_ix, MGS*))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); |
a0d0e21e | 291 | } |
e0a73de4 | 292 | if (PL_localizing == 2 |
b5ed8c44 | 293 | && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
e7cbf6c6 | 294 | continue; |
2b260de0 | 295 | if (vtbl && vtbl->svt_set) |
16c91539 | 296 | vtbl->svt_set(aTHX_ sv, mg); |
79072805 | 297 | } |
463ee0b2 | 298 | |
8772537c | 299 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
300 | return 0; |
301 | } | |
302 | ||
954c1994 GS |
303 | /* |
304 | =for apidoc mg_length | |
305 | ||
d4e99c76 | 306 | Reports on the SV's length in bytes, calling length magic if available, |
796b6530 | 307 | but does not set the UTF8 flag on C<sv>. It will fall back to 'get' |
bd8446cf | 308 | magic if there is no 'length' magic, but with no indication as to |
796b6530 KW |
309 | whether it called 'get' magic. It assumes C<sv> is a C<PVMG> or |
310 | higher. Use C<sv_len()> instead. | |
954c1994 GS |
311 | |
312 | =cut | |
313 | */ | |
314 | ||
79072805 | 315 | U32 |
864dbfa3 | 316 | Perl_mg_length(pTHX_ SV *sv) |
79072805 LW |
317 | { |
318 | MAGIC* mg; | |
463ee0b2 | 319 | STRLEN len; |
463ee0b2 | 320 | |
7918f24d NC |
321 | PERL_ARGS_ASSERT_MG_LENGTH; |
322 | ||
79072805 | 323 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 324 | const MGVTBL * const vtbl = mg->mg_virtual; |
2b260de0 | 325 | if (vtbl && vtbl->svt_len) { |
35a4481c | 326 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
455ece5e | 327 | save_magic(mgs_ix, sv); |
a0d0e21e | 328 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 329 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 330 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
85e6fe83 LW |
331 | return len; |
332 | } | |
333 | } | |
334 | ||
bd8446cf | 335 | (void)SvPV_const(sv, len); |
463ee0b2 | 336 | return len; |
79072805 LW |
337 | } |
338 | ||
8fb26106 | 339 | I32 |
864dbfa3 | 340 | Perl_mg_size(pTHX_ SV *sv) |
93965878 NIS |
341 | { |
342 | MAGIC* mg; | |
ac27b0f5 | 343 | |
7918f24d NC |
344 | PERL_ARGS_ASSERT_MG_SIZE; |
345 | ||
93965878 | 346 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 347 | const MGVTBL* const vtbl = mg->mg_virtual; |
2b260de0 | 348 | if (vtbl && vtbl->svt_len) { |
35a4481c AL |
349 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
350 | I32 len; | |
455ece5e | 351 | save_magic(mgs_ix, sv); |
93965878 | 352 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 353 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 354 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
93965878 NIS |
355 | return len; |
356 | } | |
357 | } | |
358 | ||
359 | switch(SvTYPE(sv)) { | |
360 | case SVt_PVAV: | |
502c6561 | 361 | return AvFILLp((const AV *) sv); /* Fallback to non-tied array */ |
93965878 NIS |
362 | case SVt_PVHV: |
363 | /* FIXME */ | |
364 | default: | |
cea2e8a9 | 365 | Perl_croak(aTHX_ "Size magic not implemented"); |
81d52ecd | 366 | |
93965878 | 367 | } |
a25b5927 | 368 | NOT_REACHED; /* NOTREACHED */ |
93965878 NIS |
369 | } |
370 | ||
954c1994 GS |
371 | /* |
372 | =for apidoc mg_clear | |
373 | ||
fbe13c60 | 374 | Clear something magical that the SV represents. See C<L</sv_magic>>. |
954c1994 GS |
375 | |
376 | =cut | |
377 | */ | |
378 | ||
79072805 | 379 | int |
864dbfa3 | 380 | Perl_mg_clear(pTHX_ SV *sv) |
79072805 | 381 | { |
35a4481c | 382 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 383 | MAGIC* mg; |
8ac77ac9 | 384 | MAGIC *nextmg; |
463ee0b2 | 385 | |
7918f24d NC |
386 | PERL_ARGS_ASSERT_MG_CLEAR; |
387 | ||
455ece5e | 388 | save_magic(mgs_ix, sv); |
463ee0b2 | 389 | |
8ac77ac9 | 390 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { |
35a4481c | 391 | const MGVTBL* const vtbl = mg->mg_virtual; |
a0d0e21e | 392 | /* omit GSKIP -- never set here */ |
727405f8 | 393 | |
8ac77ac9 NC |
394 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
395 | ||
2b260de0 | 396 | if (vtbl && vtbl->svt_clear) |
16c91539 | 397 | vtbl->svt_clear(aTHX_ sv, mg); |
79072805 | 398 | } |
463ee0b2 | 399 | |
8772537c | 400 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
401 | return 0; |
402 | } | |
403 | ||
ed624ca8 | 404 | static MAGIC* |
ddeaf645 | 405 | S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags) |
39de7f53 | 406 | { |
39de7f53 FR |
407 | assert(flags <= 1); |
408 | ||
409 | if (sv) { | |
410 | MAGIC *mg; | |
411 | ||
412 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
413 | if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) { | |
414 | return mg; | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
419 | return NULL; | |
420 | } | |
421 | ||
954c1994 GS |
422 | /* |
423 | =for apidoc mg_find | |
424 | ||
796b6530 | 425 | Finds the magic pointer for C<type> matching the SV. See C<L</sv_magic>>. |
954c1994 GS |
426 | |
427 | =cut | |
428 | */ | |
429 | ||
93a17b20 | 430 | MAGIC* |
ddeaf645 | 431 | Perl_mg_find(const SV *sv, int type) |
93a17b20 | 432 | { |
ddeaf645 | 433 | return S_mg_findext_flags(sv, type, NULL, 0); |
39de7f53 FR |
434 | } |
435 | ||
436 | /* | |
437 | =for apidoc mg_findext | |
438 | ||
439 | Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See | |
fbe13c60 | 440 | C<L</sv_magicext>>. |
39de7f53 FR |
441 | |
442 | =cut | |
443 | */ | |
444 | ||
445 | MAGIC* | |
ddeaf645 | 446 | Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl) |
39de7f53 | 447 | { |
ddeaf645 | 448 | return S_mg_findext_flags(sv, type, vtbl, 1); |
93a17b20 LW |
449 | } |
450 | ||
96c2a8ff FC |
451 | MAGIC * |
452 | Perl_mg_find_mglob(pTHX_ SV *sv) | |
453 | { | |
454 | PERL_ARGS_ASSERT_MG_FIND_MGLOB; | |
455 | if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') { | |
456 | /* This sv is only a delegate. //g magic must be attached to | |
457 | its target. */ | |
458 | vivify_defelem(sv); | |
459 | sv = LvTARG(sv); | |
460 | } | |
461 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) | |
ddeaf645 | 462 | return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0); |
96c2a8ff FC |
463 | return NULL; |
464 | } | |
465 | ||
954c1994 GS |
466 | /* |
467 | =for apidoc mg_copy | |
468 | ||
fbe13c60 | 469 | Copies the magic from one SV to another. See C<L</sv_magic>>. |
954c1994 GS |
470 | |
471 | =cut | |
472 | */ | |
473 | ||
79072805 | 474 | int |
864dbfa3 | 475 | Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen) |
79072805 | 476 | { |
463ee0b2 | 477 | int count = 0; |
79072805 | 478 | MAGIC* mg; |
7918f24d NC |
479 | |
480 | PERL_ARGS_ASSERT_MG_COPY; | |
481 | ||
463ee0b2 | 482 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 483 | const MGVTBL* const vtbl = mg->mg_virtual; |
68795e93 | 484 | if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){ |
16c91539 | 485 | count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen); |
68795e93 | 486 | } |
823a54a3 AL |
487 | else { |
488 | const char type = mg->mg_type; | |
1e73acc8 | 489 | if (isUPPER(type) && type != PERL_MAGIC_uvar) { |
823a54a3 AL |
490 | sv_magic(nsv, |
491 | (type == PERL_MAGIC_tied) | |
492 | ? SvTIED_obj(sv, mg) | |
27deb0cf | 493 | : mg->mg_obj, |
823a54a3 AL |
494 | toLOWER(type), key, klen); |
495 | count++; | |
496 | } | |
79072805 | 497 | } |
79072805 | 498 | } |
463ee0b2 | 499 | return count; |
79072805 LW |
500 | } |
501 | ||
954c1994 | 502 | /* |
0cbee0a4 DM |
503 | =for apidoc mg_localize |
504 | ||
9711599e | 505 | Copy some of the magic from an existing SV to new localized version of that |
dfcfced8 KW |
506 | SV. Container magic (I<e.g.>, C<%ENV>, C<$1>, C<tie>) |
507 | gets copied, value magic doesn't (I<e.g.>, | |
796b6530 | 508 | C<taint>, C<pos>). |
9711599e | 509 | |
796b6530 | 510 | If C<setmagic> is false then no set magic will be called on the new (empty) SV. |
61b16eb9 | 511 | This typically means that assignment will soon follow (e.g. S<C<'local $x = $y'>>), |
9711599e | 512 | and that will handle the magic. |
0cbee0a4 DM |
513 | |
514 | =cut | |
515 | */ | |
516 | ||
517 | void | |
af7df257 | 518 | Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic) |
0cbee0a4 DM |
519 | { |
520 | MAGIC *mg; | |
7918f24d NC |
521 | |
522 | PERL_ARGS_ASSERT_MG_LOCALIZE; | |
523 | ||
658a9f31 JD |
524 | if (nsv == DEFSV) |
525 | return; | |
526 | ||
0cbee0a4 | 527 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
2b1b43ea | 528 | const MGVTBL* const vtbl = mg->mg_virtual; |
e0a73de4 | 529 | if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
0cbee0a4 | 530 | continue; |
0cbee0a4 | 531 | |
a5063e7c | 532 | if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local) |
16c91539 | 533 | (void)vtbl->svt_local(aTHX_ nsv, mg); |
a5063e7c | 534 | else |
0cbee0a4 DM |
535 | sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl, |
536 | mg->mg_ptr, mg->mg_len); | |
a5063e7c | 537 | |
0cbee0a4 | 538 | /* container types should remain read-only across localization */ |
9ff3e6d8 | 539 | SvFLAGS(nsv) |= SvREADONLY(sv); |
0cbee0a4 DM |
540 | } |
541 | ||
542 | if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) { | |
543 | SvFLAGS(nsv) |= SvMAGICAL(sv); | |
af7df257 | 544 | if (setmagic) { |
9711599e CS |
545 | PL_localizing = 1; |
546 | SvSETMAGIC(nsv); | |
547 | PL_localizing = 0; | |
548 | } | |
0cbee0a4 DM |
549 | } |
550 | } | |
551 | ||
d9088386 Z |
552 | #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg) |
553 | static void | |
554 | S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg) | |
555 | { | |
556 | const MGVTBL* const vtbl = mg->mg_virtual; | |
557 | if (vtbl && vtbl->svt_free) | |
558 | vtbl->svt_free(aTHX_ sv, mg); | |
559 | if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) { | |
560 | if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8) | |
561 | Safefree(mg->mg_ptr); | |
562 | else if (mg->mg_len == HEf_SVKEY) | |
563 | SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr)); | |
564 | } | |
565 | if (mg->mg_flags & MGf_REFCOUNTED) | |
566 | SvREFCNT_dec(mg->mg_obj); | |
567 | Safefree(mg); | |
568 | } | |
569 | ||
0cbee0a4 | 570 | /* |
954c1994 GS |
571 | =for apidoc mg_free |
572 | ||
fbe13c60 | 573 | Free any magic storage used by the SV. See C<L</sv_magic>>. |
954c1994 GS |
574 | |
575 | =cut | |
576 | */ | |
577 | ||
79072805 | 578 | int |
864dbfa3 | 579 | Perl_mg_free(pTHX_ SV *sv) |
79072805 LW |
580 | { |
581 | MAGIC* mg; | |
582 | MAGIC* moremagic; | |
7918f24d NC |
583 | |
584 | PERL_ARGS_ASSERT_MG_FREE; | |
585 | ||
79072805 | 586 | for (mg = SvMAGIC(sv); mg; mg = moremagic) { |
79072805 | 587 | moremagic = mg->mg_moremagic; |
d9088386 | 588 | mg_free_struct(sv, mg); |
c826f41b | 589 | SvMAGIC_set(sv, moremagic); |
79072805 | 590 | } |
b162af07 | 591 | SvMAGIC_set(sv, NULL); |
68f8932e | 592 | SvMAGICAL_off(sv); |
79072805 LW |
593 | return 0; |
594 | } | |
595 | ||
d9088386 Z |
596 | /* |
597 | =for apidoc Am|void|mg_free_type|SV *sv|int how | |
598 | ||
2d7f6611 | 599 | Remove any magic of type C<how> from the SV C<sv>. See L</sv_magic>. |
d9088386 Z |
600 | |
601 | =cut | |
602 | */ | |
603 | ||
604 | void | |
605 | Perl_mg_free_type(pTHX_ SV *sv, int how) | |
606 | { | |
607 | MAGIC *mg, *prevmg, *moremg; | |
608 | PERL_ARGS_ASSERT_MG_FREE_TYPE; | |
609 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
d9088386 Z |
610 | moremg = mg->mg_moremagic; |
611 | if (mg->mg_type == how) { | |
19742f39 | 612 | MAGIC *newhead; |
d9088386 Z |
613 | /* temporarily move to the head of the magic chain, in case |
614 | custom free code relies on this historical aspect of mg_free */ | |
615 | if (prevmg) { | |
616 | prevmg->mg_moremagic = moremg; | |
617 | mg->mg_moremagic = SvMAGIC(sv); | |
618 | SvMAGIC_set(sv, mg); | |
619 | } | |
620 | newhead = mg->mg_moremagic; | |
621 | mg_free_struct(sv, mg); | |
622 | SvMAGIC_set(sv, newhead); | |
623 | mg = prevmg; | |
624 | } | |
625 | } | |
626 | mg_magical(sv); | |
627 | } | |
628 | ||
e0d4aead TC |
629 | /* |
630 | =for apidoc mg_freeext | |
631 | ||
632 | Remove any magic of type C<how> using virtual table C<vtbl> from the | |
633 | SV C<sv>. See L</sv_magic>. | |
634 | ||
635 | C<mg_freeext(sv, how, NULL)> is equivalent to C<mg_free_type(sv, how)>. | |
636 | ||
637 | =cut | |
638 | */ | |
639 | ||
640 | void | |
641 | Perl_mg_freeext(pTHX_ SV *sv, int how, const MGVTBL *vtbl) | |
642 | { | |
643 | MAGIC *mg, *prevmg, *moremg; | |
644 | PERL_ARGS_ASSERT_MG_FREEEXT; | |
645 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
646 | MAGIC *newhead; | |
647 | moremg = mg->mg_moremagic; | |
648 | if (mg->mg_type == how && (vtbl == NULL || mg->mg_virtual == vtbl)) { | |
649 | /* temporarily move to the head of the magic chain, in case | |
650 | custom free code relies on this historical aspect of mg_free */ | |
651 | if (prevmg) { | |
652 | prevmg->mg_moremagic = moremg; | |
653 | mg->mg_moremagic = SvMAGIC(sv); | |
654 | SvMAGIC_set(sv, mg); | |
655 | } | |
656 | newhead = mg->mg_moremagic; | |
657 | mg_free_struct(sv, mg); | |
658 | SvMAGIC_set(sv, newhead); | |
659 | mg = prevmg; | |
660 | } | |
661 | } | |
662 | mg_magical(sv); | |
663 | } | |
664 | ||
79072805 | 665 | #include <signal.h> |
79072805 | 666 | |
942e002e | 667 | U32 |
864dbfa3 | 668 | Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 669 | { |
8772537c | 670 | PERL_UNUSED_ARG(sv); |
6cef1e77 | 671 | |
7918f24d NC |
672 | PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT; |
673 | ||
0bd48802 | 674 | if (PL_curpm) { |
27deb0cf | 675 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 676 | if (rx) { |
fa531f32 DM |
677 | const SSize_t n = (SSize_t)mg->mg_obj; |
678 | if (n == '+') { /* @+ */ | |
a678b0e4 | 679 | /* return the number possible */ |
07bc277f | 680 | return RX_NPARENS(rx); |
27deb0cf | 681 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
07bc277f | 682 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 YO |
683 | |
684 | /* return the last filled */ | |
f46c4081 | 685 | while ( paren >= 0 |
07bc277f NC |
686 | && (RX_OFFS(rx)[paren].start == -1 |
687 | || RX_OFFS(rx)[paren].end == -1) ) | |
f46c4081 | 688 | paren--; |
fa531f32 | 689 | if (n == '-') { |
27deb0cf YO |
690 | /* @- */ |
691 | return (U32)paren; | |
692 | } else { | |
693 | /* @^CAPTURE @{^CAPTURE} */ | |
694 | return paren >= 0 ? (U32)(paren-1) : (U32)-1; | |
695 | } | |
696 | } | |
0bd48802 | 697 | } |
8f580fb8 | 698 | } |
ac27b0f5 | 699 | |
942e002e | 700 | return (U32)-1; |
6cef1e77 IZ |
701 | } |
702 | ||
6502e081 DM |
703 | /* @-, @+ */ |
704 | ||
6cef1e77 | 705 | int |
864dbfa3 | 706 | Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 707 | { |
7918f24d NC |
708 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET; |
709 | ||
0bd48802 | 710 | if (PL_curpm) { |
27deb0cf | 711 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 712 | if (rx) { |
fa531f32 | 713 | const SSize_t n = (SSize_t)mg->mg_obj; |
27deb0cf YO |
714 | /* @{^CAPTURE} does not contain $&, so we need to increment by 1 */ |
715 | const I32 paren = mg->mg_len | |
fa531f32 | 716 | + (n == '\003' ? 1 : 0); |
a10eae29 FC |
717 | SSize_t s; |
718 | SSize_t t; | |
0bd48802 AL |
719 | if (paren < 0) |
720 | return 0; | |
07bc277f NC |
721 | if (paren <= (I32)RX_NPARENS(rx) && |
722 | (s = RX_OFFS(rx)[paren].start) != -1 && | |
723 | (t = RX_OFFS(rx)[paren].end) != -1) | |
0bd48802 | 724 | { |
a10eae29 | 725 | SSize_t i; |
27deb0cf | 726 | |
fa531f32 | 727 | if (n == '+') /* @+ */ |
0bd48802 | 728 | i = t; |
fa531f32 | 729 | else if (n == '-') /* @- */ |
0bd48802 | 730 | i = s; |
27deb0cf YO |
731 | else { /* @^CAPTURE @{^CAPTURE} */ |
732 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
733 | return 0; | |
734 | } | |
0bd48802 | 735 | |
a10eae29 | 736 | if (RX_MATCH_UTF8(rx)) { |
07bc277f | 737 | const char * const b = RX_SUBBEG(rx); |
0bd48802 | 738 | if (b) |
6502e081 DM |
739 | i = RX_SUBCOFFSET(rx) + |
740 | utf8_length((U8*)b, | |
741 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
0bd48802 | 742 | } |
727405f8 | 743 | |
a10eae29 | 744 | sv_setuv(sv, i); |
232af1f8 | 745 | return 0; |
1aa99e6b | 746 | } |
0bd48802 | 747 | } |
6cef1e77 | 748 | } |
3773545d | 749 | sv_set_undef(sv); |
6cef1e77 IZ |
750 | return 0; |
751 | } | |
752 | ||
6502e081 DM |
753 | /* @-, @+ */ |
754 | ||
e4b89193 | 755 | int |
a29d06ed MG |
756 | Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg) |
757 | { | |
7918f24d | 758 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET; |
dc3bf405 | 759 | PERL_UNUSED_CONTEXT; |
d4c19fe8 AL |
760 | PERL_UNUSED_ARG(sv); |
761 | PERL_UNUSED_ARG(mg); | |
cb077ed2 | 762 | Perl_croak_no_modify(); |
0dbb1585 | 763 | NORETURN_FUNCTION_END; |
a29d06ed MG |
764 | } |
765 | ||
ad3296c6 | 766 | #define SvRTRIM(sv) STMT_START { \ |
eae92ea0 GA |
767 | if (SvPOK(sv)) { \ |
768 | STRLEN len = SvCUR(sv); \ | |
769 | char * const p = SvPVX(sv); \ | |
8e6b4db6 PC |
770 | while (len > 0 && isSPACE(p[len-1])) \ |
771 | --len; \ | |
772 | SvCUR_set(sv, len); \ | |
773 | p[len] = '\0'; \ | |
774 | } \ | |
ad3296c6 SH |
775 | } STMT_END |
776 | ||
8b850bd5 NC |
777 | void |
778 | Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv) | |
779 | { | |
7918f24d NC |
780 | PERL_ARGS_ASSERT_EMULATE_COP_IO; |
781 | ||
8b850bd5 | 782 | if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT))) |
e03e82a0 | 783 | sv_set_undef(sv); |
8b850bd5 | 784 | else { |
b2aed775 | 785 | SvPVCLEAR(sv); |
8b850bd5 NC |
786 | SvUTF8_off(sv); |
787 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
20439bc7 | 788 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); |
8b850bd5 NC |
789 | assert(value); |
790 | sv_catsv(sv, value); | |
791 | } | |
792 | sv_catpvs(sv, "\0"); | |
793 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
20439bc7 | 794 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); |
8b850bd5 NC |
795 | assert(value); |
796 | sv_catsv(sv, value); | |
797 | } | |
798 | } | |
799 | } | |
800 | ||
d9fe7d23 KW |
801 | STATIC void |
802 | S_fixup_errno_string(pTHX_ SV* sv) | |
803 | { | |
804 | /* Do what is necessary to fixup the non-empty string in 'sv' for return to | |
805 | * Perl space. */ | |
806 | ||
807 | PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING; | |
808 | ||
809 | assert(SvOK(sv)); | |
b35e4f8b KW |
810 | |
811 | if(strEQ(SvPVX(sv), "")) { | |
812 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); | |
813 | } | |
814 | else { | |
d9fe7d23 | 815 | |
d3c0b317 KW |
816 | /* In some locales the error string may come back as UTF-8, in which |
817 | * case we should turn on that flag. This didn't use to happen, and to | |
5320b60d KW |
818 | * avoid as many possible backward compatibility issues as possible, we |
819 | * don't turn on the flag unless we have to. So the flag stays off for | |
9f10db87 KW |
820 | * an entirely invariant string. We assume that if the string looks |
821 | * like UTF-8, it really is UTF-8: "text in any other encoding that | |
822 | * uses bytes with the high bit set is extremely unlikely to pass a | |
823 | * UTF-8 validity test" | |
824 | * (http://en.wikipedia.org/wiki/Charset_detection). There is a | |
825 | * potential that we will get it wrong however, especially on short | |
a8f4b0c6 KW |
826 | * error message text, so do an additional check. */ |
827 | if ( ! IN_BYTES /* respect 'use bytes' */ | |
c5f058df | 828 | && ! is_utf8_invariant_string((U8*) SvPVX_const(sv), SvCUR(sv)) |
a8f4b0c6 KW |
829 | && is_utf8_string((U8*) SvPVX_const(sv), SvCUR(sv)) |
830 | ||
831 | #ifdef USE_LOCALE_MESSAGES | |
832 | ||
833 | && _is_cur_LC_category_utf8(LC_MESSAGES) | |
834 | ||
835 | #elif defined(USE_LOCLAE_CTYPE) | |
836 | ||
837 | /* For systems that don't have a separate message category, | |
838 | * this assumes that they follow the CTYPE one */ | |
839 | && _is_cur_LC_category_utf8(LC_CTYPE) | |
840 | ||
841 | #endif | |
842 | ||
843 | ) { | |
d3c0b317 KW |
844 | SvUTF8_on(sv); |
845 | } | |
b35e4f8b | 846 | } |
d9fe7d23 KW |
847 | } |
848 | ||
658db622 Z |
849 | /* |
850 | =for apidoc Am|SV *|sv_string_from_errnum|int errnum|SV *tgtsv | |
851 | ||
852 | Generates the message string describing an OS error and returns it as | |
853 | an SV. C<errnum> must be a value that C<errno> could take, identifying | |
854 | the type of error. | |
855 | ||
856 | If C<tgtsv> is non-null then the string will be written into that SV | |
857 | (overwriting existing content) and it will be returned. If C<tgtsv> | |
858 | is a null pointer then the string will be written into a new mortal SV | |
859 | which will be returned. | |
860 | ||
861 | The message will be taken from whatever locale would be used by C<$!>, | |
862 | and will be encoded in the SV in whatever manner would be used by C<$!>. | |
863 | The details of this process are subject to future change. Currently, | |
864 | the message is taken from the C locale by default (usually producing an | |
865 | English message), and from the currently selected locale when in the scope | |
866 | of the C<use locale> pragma. A heuristic attempt is made to decode the | |
867 | message from the locale's character encoding, but it will only be decoded | |
868 | as either UTF-8 or ISO-8859-1. It is always correctly decoded in a UTF-8 | |
869 | locale, usually in an ISO-8859-1 locale, and never in any other locale. | |
870 | ||
871 | The SV is always returned containing an actual string, and with no other | |
872 | OK bits set. Unlike C<$!>, a message is even yielded for C<errnum> zero | |
873 | (meaning success), and if no useful message is available then a useless | |
874 | string (currently empty) is returned. | |
875 | ||
876 | =cut | |
877 | */ | |
878 | ||
879 | SV * | |
880 | Perl_sv_string_from_errnum(pTHX_ int errnum, SV *tgtsv) | |
881 | { | |
882 | char const *errstr; | |
883 | if(!tgtsv) | |
884 | tgtsv = sv_newmortal(); | |
885 | errstr = my_strerror(errnum); | |
886 | if(errstr) { | |
887 | sv_setpv(tgtsv, errstr); | |
888 | fixup_errno_string(tgtsv); | |
889 | } else { | |
890 | SvPVCLEAR(tgtsv); | |
891 | } | |
892 | return tgtsv; | |
893 | } | |
894 | ||
25bbd826 CB |
895 | #ifdef VMS |
896 | #include <descrip.h> | |
897 | #include <starlet.h> | |
898 | #endif | |
899 | ||
79072805 | 900 | int |
864dbfa3 | 901 | Perl_magic_get(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 902 | { |
eb578fdb KW |
903 | I32 paren; |
904 | const char *s = NULL; | |
905 | REGEXP *rx; | |
823a54a3 | 906 | const char * const remaining = mg->mg_ptr + 1; |
e91d8259 | 907 | char nextchar; |
79072805 | 908 | |
7918f24d NC |
909 | PERL_ARGS_ASSERT_MAGIC_GET; |
910 | ||
e91d8259 | 911 | if (!mg->mg_ptr) { |
e91d8259 | 912 | paren = mg->mg_len; |
e91d8259 | 913 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
a6d0b1b5 | 914 | do_numbuf_fetch: |
e91d8259 | 915 | CALLREG_NUMBUF_FETCH(rx,paren,sv); |
e91d8259 | 916 | } |
e03e82a0 DM |
917 | else |
918 | goto set_undef; | |
e91d8259 NC |
919 | return 0; |
920 | } | |
921 | ||
922 | nextchar = *remaining; | |
79072805 | 923 | switch (*mg->mg_ptr) { |
748a9306 | 924 | case '\001': /* ^A */ |
f2da823f | 925 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
e03e82a0 DM |
926 | else |
927 | sv_set_undef(sv); | |
125b9982 NT |
928 | if (SvTAINTED(PL_bodytarget)) |
929 | SvTAINTED_on(sv); | |
748a9306 | 930 | break; |
e5218da5 | 931 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
823a54a3 | 932 | if (nextchar == '\0') { |
e5218da5 GA |
933 | sv_setiv(sv, (IV)PL_minus_c); |
934 | } | |
823a54a3 | 935 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { |
e5218da5 GA |
936 | sv_setiv(sv, (IV)STATUS_NATIVE); |
937 | } | |
49460fe6 NIS |
938 | break; |
939 | ||
79072805 | 940 | case '\004': /* ^D */ |
aea4f609 | 941 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
79072805 | 942 | break; |
28f23441 | 943 | case '\005': /* ^E */ |
6c6eab55 KW |
944 | if (nextchar != '\0') { |
945 | if (strEQ(remaining, "NCODING")) | |
3773545d | 946 | sv_set_undef(sv); |
4f4ff3a7 | 947 | break; |
6c6eab55 | 948 | } |
4f4ff3a7 KW |
949 | |
950 | #if defined(VMS) || defined(OS2) || defined(WIN32) | |
951 | # if defined(VMS) | |
2a99ff86 KW |
952 | { |
953 | char msg[255]; | |
954 | $DESCRIPTOR(msgdsc,msg); | |
955 | sv_setnv(sv,(NV) vaxc$errno); | |
956 | if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) | |
957 | sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); | |
958 | else | |
b2aed775 | 959 | SvPVCLEAR(sv); |
2a99ff86 | 960 | } |
4b645107 | 961 | #elif defined(OS2) |
2a99ff86 KW |
962 | if (!(_emx_env & 0x200)) { /* Under DOS */ |
963 | sv_setnv(sv, (NV)errno); | |
2c6ee1a7 | 964 | sv_setpv(sv, errno ? my_strerror(errno) : ""); |
2a99ff86 KW |
965 | } else { |
966 | if (errno != errno_isOS2) { | |
967 | const int tmp = _syserrno(); | |
968 | if (tmp) /* 2nd call to _syserrno() makes it 0 */ | |
969 | Perl_rc = tmp; | |
970 | } | |
971 | sv_setnv(sv, (NV)Perl_rc); | |
972 | sv_setpv(sv, os2error(Perl_rc)); | |
973 | } | |
1534c6f5 | 974 | if (SvOK(sv) && strNE(SvPVX(sv), "")) { |
99461a73 KW |
975 | fixup_errno_string(sv); |
976 | } | |
4f4ff3a7 | 977 | # elif defined(WIN32) |
2a99ff86 KW |
978 | { |
979 | const DWORD dwErr = GetLastError(); | |
980 | sv_setnv(sv, (NV)dwErr); | |
981 | if (dwErr) { | |
982 | PerlProc_GetOSError(sv, dwErr); | |
2efab60d | 983 | fixup_errno_string(sv); |
2a99ff86 KW |
984 | } |
985 | else | |
b2aed775 | 986 | SvPVCLEAR(sv); |
2a99ff86 KW |
987 | SetLastError(dwErr); |
988 | } | |
4f4ff3a7 KW |
989 | # else |
990 | # error Missing code for platform | |
991 | # endif | |
2a99ff86 KW |
992 | SvRTRIM(sv); |
993 | SvNOK_on(sv); /* what a wonderful hack! */ | |
994 | break; | |
4f4ff3a7 KW |
995 | #endif /* End of platforms with special handling for $^E; others just fall |
996 | through to $! */ | |
2165bd23 | 997 | /* FALLTHROUGH */ |
46f3e16c KW |
998 | |
999 | case '!': | |
1000 | { | |
5f1b979d | 1001 | dSAVE_ERRNO; |
46f3e16c | 1002 | #ifdef VMS |
5f1b979d | 1003 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno)); |
46f3e16c | 1004 | #else |
5f1b979d | 1005 | sv_setnv(sv, (NV)errno); |
46f3e16c KW |
1006 | #endif |
1007 | #ifdef OS2 | |
5f1b979d KW |
1008 | if (errno == errno_isOS2 || errno == errno_isOS2_set) |
1009 | sv_setpv(sv, os2error(Perl_rc)); | |
1010 | else | |
46f3e16c | 1011 | #endif |
5f1b979d | 1012 | if (! errno) { |
b2aed775 | 1013 | SvPVCLEAR(sv); |
46f3e16c | 1014 | } |
5f1b979d | 1015 | else { |
658db622 Z |
1016 | sv_string_from_errnum(errno, sv); |
1017 | /* If no useful string is available, don't | |
1018 | * claim to have a string part. The SvNOK_on() | |
5f1b979d | 1019 | * below will cause just the number part to be valid */ |
658db622 Z |
1020 | if (!SvCUR(sv)) |
1021 | SvPOK_off(sv); | |
5f1b979d KW |
1022 | } |
1023 | RESTORE_ERRNO; | |
46f3e16c KW |
1024 | } |
1025 | ||
1026 | SvRTRIM(sv); | |
1027 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1028 | break; | |
1029 | ||
79072805 | 1030 | case '\006': /* ^F */ |
3280af22 | 1031 | sv_setiv(sv, (IV)PL_maxsysfd); |
79072805 | 1032 | break; |
9ebf26ad FR |
1033 | case '\007': /* ^GLOBAL_PHASE */ |
1034 | if (strEQ(remaining, "LOBAL_PHASE")) { | |
1035 | sv_setpvn(sv, PL_phase_names[PL_phase], | |
1036 | strlen(PL_phase_names[PL_phase])); | |
1037 | } | |
1038 | break; | |
a0d0e21e | 1039 | case '\010': /* ^H */ |
5d382c25 | 1040 | sv_setuv(sv, PL_hints); |
a0d0e21e | 1041 | break; |
9d116dd7 | 1042 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
120f7abe | 1043 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
79072805 | 1044 | break; |
8561ea1d FC |
1045 | case '\014': /* ^LAST_FH */ |
1046 | if (strEQ(remaining, "AST_FH")) { | |
745e740c | 1047 | if (PL_last_in_gv && (SV*)PL_last_in_gv != &PL_sv_undef) { |
8561ea1d FC |
1048 | assert(isGV_with_GP(PL_last_in_gv)); |
1049 | SV_CHECK_THINKFIRST_COW_DROP(sv); | |
1050 | prepare_SV_for_RV(sv); | |
1051 | SvOK_off(sv); | |
1052 | SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv)); | |
1053 | SvROK_on(sv); | |
1054 | sv_rvweaken(sv); | |
1055 | } | |
3773545d DM |
1056 | else |
1057 | sv_set_undef(sv); | |
8561ea1d FC |
1058 | } |
1059 | break; | |
ac27b0f5 | 1060 | case '\017': /* ^O & ^OPEN */ |
823a54a3 | 1061 | if (nextchar == '\0') { |
ac27b0f5 | 1062 | sv_setpv(sv, PL_osname); |
3511154c DM |
1063 | SvTAINTED_off(sv); |
1064 | } | |
823a54a3 | 1065 | else if (strEQ(remaining, "PEN")) { |
8b850bd5 | 1066 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); |
ac27b0f5 | 1067 | } |
28f23441 | 1068 | break; |
9ebf26ad | 1069 | case '\020': |
a6d0b1b5 | 1070 | sv_setiv(sv, (IV)PL_perldb); |
79072805 | 1071 | break; |
fb73857a | 1072 | case '\023': /* ^S */ |
a6d0b1b5 | 1073 | { |
bc177e6b | 1074 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) |
0c34ef67 | 1075 | SvOK_off(sv); |
3280af22 | 1076 | else if (PL_in_eval) |
6dc8a9e4 | 1077 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); |
a4268c0a AMS |
1078 | else |
1079 | sv_setiv(sv, 0); | |
d58bf5aa | 1080 | } |
fb73857a | 1081 | break; |
79072805 | 1082 | case '\024': /* ^T */ |
823a54a3 | 1083 | if (nextchar == '\0') { |
88e89b8a | 1084 | #ifdef BIG_TIME |
7c36658b | 1085 | sv_setnv(sv, PL_basetime); |
88e89b8a | 1086 | #else |
7c36658b | 1087 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 1088 | #endif |
7c36658b | 1089 | } |
823a54a3 | 1090 | else if (strEQ(remaining, "AINT")) |
284167a5 S |
1091 | sv_setiv(sv, TAINTING_get |
1092 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) | |
9aa05f58 | 1093 | : 0); |
7c36658b | 1094 | break; |
e07ea26a | 1095 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
823a54a3 | 1096 | if (strEQ(remaining, "NICODE")) |
a05d7ebb | 1097 | sv_setuv(sv, (UV) PL_unicode); |
823a54a3 | 1098 | else if (strEQ(remaining, "TF8LOCALE")) |
7cebcbc0 | 1099 | sv_setuv(sv, (UV) PL_utf8locale); |
e07ea26a NC |
1100 | else if (strEQ(remaining, "TF8CACHE")) |
1101 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
1102 | break; |
1103 | case '\027': /* ^W & $^WARNING_BITS */ | |
823a54a3 | 1104 | if (nextchar == '\0') |
8298454c | 1105 | sv_setiv(sv, (IV)cBOOL(PL_dowarn & G_WARN_ON)); |
823a54a3 | 1106 | else if (strEQ(remaining, "ARNING_BITS")) { |
013b78e8 | 1107 | if (PL_compiling.cop_warnings == pWARN_NONE) { |
4438c4b7 | 1108 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; |
013b78e8 RGS |
1109 | } |
1110 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
e03e82a0 | 1111 | goto set_undef; |
013b78e8 | 1112 | } |
d3a7d8c7 | 1113 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
75b6c4ca RGS |
1114 | /* Get the bit mask for $warnings::Bits{all}, because |
1115 | * it could have been extended by warnings::register */ | |
4bac9ae4 CS |
1116 | HV * const bits = get_hv("warnings::Bits", 0); |
1117 | SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL; | |
1118 | if (bits_all) | |
1119 | sv_copypv(sv, *bits_all); | |
1120 | else | |
1121 | sv_setpvn(sv, WARN_ALLstring, WARNsize); | |
ac27b0f5 | 1122 | } |
4438c4b7 | 1123 | else { |
72dc9ed5 NC |
1124 | sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1), |
1125 | *PL_compiling.cop_warnings); | |
ac27b0f5 | 1126 | } |
4438c4b7 | 1127 | } |
8ca2a5d6 DD |
1128 | #ifdef WIN32 |
1129 | else if (strEQ(remaining, "IN32_SLOPPY_STAT")) { | |
1130 | sv_setiv(sv, w32_sloppystat); | |
1131 | } | |
1132 | #endif | |
79072805 | 1133 | break; |
79072805 | 1134 | case '+': |
aaa362c4 | 1135 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
2c7b5d76 DM |
1136 | paren = RX_LASTPAREN(rx); |
1137 | if (paren) | |
1138 | goto do_numbuf_fetch; | |
79072805 | 1139 | } |
e03e82a0 | 1140 | goto set_undef; |
a01268b5 JH |
1141 | case '\016': /* ^N */ |
1142 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { | |
2c7b5d76 DM |
1143 | paren = RX_LASTCLOSEPAREN(rx); |
1144 | if (paren) | |
1145 | goto do_numbuf_fetch; | |
a01268b5 | 1146 | } |
e03e82a0 | 1147 | goto set_undef; |
79072805 | 1148 | case '.': |
3280af22 | 1149 | if (GvIO(PL_last_in_gv)) { |
357c8808 | 1150 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); |
79072805 | 1151 | } |
79072805 LW |
1152 | break; |
1153 | case '?': | |
809a5acc | 1154 | { |
809a5acc | 1155 | sv_setiv(sv, (IV)STATUS_CURRENT); |
ff0cee69 | 1156 | #ifdef COMPLEX_STATUS |
41cb7b2b | 1157 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
1158 | LvTARGOFF(sv) = PL_statusvalue; |
1159 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1160 | #endif |
809a5acc | 1161 | } |
79072805 LW |
1162 | break; |
1163 | case '^': | |
acbe1b9d | 1164 | if (GvIOp(PL_defoutgv)) |
099be4f1 | 1165 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); |
79072805 LW |
1166 | if (s) |
1167 | sv_setpv(sv,s); | |
1168 | else { | |
3280af22 | 1169 | sv_setpv(sv,GvENAME(PL_defoutgv)); |
cb421d5e | 1170 | sv_catpvs(sv,"_TOP"); |
79072805 LW |
1171 | } |
1172 | break; | |
1173 | case '~': | |
acbe1b9d | 1174 | if (GvIOp(PL_defoutgv)) |
0daa599b | 1175 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); |
79072805 | 1176 | if (!s) |
3280af22 | 1177 | s = GvENAME(PL_defoutgv); |
79072805 LW |
1178 | sv_setpv(sv,s); |
1179 | break; | |
79072805 | 1180 | case '=': |
099be4f1 | 1181 | if (GvIO(PL_defoutgv)) |
0daa599b | 1182 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); |
79072805 LW |
1183 | break; |
1184 | case '-': | |
099be4f1 | 1185 | if (GvIO(PL_defoutgv)) |
0daa599b | 1186 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); |
79072805 LW |
1187 | break; |
1188 | case '%': | |
099be4f1 | 1189 | if (GvIO(PL_defoutgv)) |
0daa599b | 1190 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); |
79072805 | 1191 | break; |
79072805 | 1192 | case ':': |
79072805 LW |
1193 | case '/': |
1194 | break; | |
1195 | case '[': | |
e1dccc0d | 1196 | sv_setiv(sv, 0); |
79072805 LW |
1197 | break; |
1198 | case '|': | |
099be4f1 | 1199 | if (GvIO(PL_defoutgv)) |
0daa599b | 1200 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); |
79072805 | 1201 | break; |
79072805 | 1202 | case '\\': |
b2ce0fda | 1203 | if (PL_ors_sv) |
f28098ff | 1204 | sv_copypv(sv, PL_ors_sv); |
4bac9ae4 | 1205 | else |
e03e82a0 | 1206 | goto set_undef; |
79072805 | 1207 | break; |
0e219455 | 1208 | case '$': /* $$ */ |
9cdac2a2 FC |
1209 | { |
1210 | IV const pid = (IV)PerlProc_getpid(); | |
19db9fb7 | 1211 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { |
9cdac2a2 FC |
1212 | /* never set manually, or at least not since last fork */ |
1213 | sv_setiv(sv, pid); | |
19db9fb7 Z |
1214 | /* never unsafe, even if reading in a tainted expression */ |
1215 | SvTAINTED_off(sv); | |
1216 | } | |
9cdac2a2 FC |
1217 | /* else a value has been assigned manually, so do nothing */ |
1218 | } | |
0e219455 | 1219 | break; |
79072805 | 1220 | case '<': |
dfff4baf | 1221 | sv_setuid(sv, PerlProc_getuid()); |
79072805 LW |
1222 | break; |
1223 | case '>': | |
dfff4baf | 1224 | sv_setuid(sv, PerlProc_geteuid()); |
79072805 LW |
1225 | break; |
1226 | case '(': | |
dfff4baf | 1227 | sv_setgid(sv, PerlProc_getgid()); |
79072805 LW |
1228 | goto add_groups; |
1229 | case ')': | |
dfff4baf | 1230 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1231 | add_groups: |
79072805 | 1232 | #ifdef HAS_GETGROUPS |
79072805 | 1233 | { |
57d7c65e | 1234 | Groups_t *gary = NULL; |
375ed12a JH |
1235 | I32 num_groups = getgroups(0, gary); |
1236 | if (num_groups > 0) { | |
19742f39 | 1237 | I32 i; |
375ed12a JH |
1238 | Newx(gary, num_groups, Groups_t); |
1239 | num_groups = getgroups(num_groups, gary); | |
1240 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1241 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1242 | Safefree(gary); |
1243 | } | |
79072805 | 1244 | } |
155aba94 | 1245 | (void)SvIOK_on(sv); /* what a wonderful hack! */ |
cd70abae | 1246 | #endif |
79072805 | 1247 | break; |
79072805 LW |
1248 | case '0': |
1249 | break; | |
1250 | } | |
a0d0e21e | 1251 | return 0; |
e03e82a0 DM |
1252 | |
1253 | set_undef: | |
1254 | sv_set_undef(sv); | |
1255 | return 0; | |
79072805 LW |
1256 | } |
1257 | ||
1258 | int | |
864dbfa3 | 1259 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1260 | { |
8772537c | 1261 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1262 | |
7918f24d NC |
1263 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1264 | ||
79072805 | 1265 | if (uf && uf->uf_val) |
24f81a43 | 1266 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1267 | return 0; |
1268 | } | |
1269 | ||
1270 | int | |
864dbfa3 | 1271 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1272 | { |
9ae3433d | 1273 | STRLEN len = 0, klen; |
12033064 | 1274 | const char * const key = MgPV_const(mg,klen); |
888a67f6 | 1275 | const char *s = ""; |
1e422769 | 1276 | |
7918f24d NC |
1277 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1278 | ||
613c63b4 | 1279 | SvGETMAGIC(sv); |
12033064 | 1280 | if (SvOK(sv)) { |
613c63b4 CS |
1281 | /* defined environment variables are byte strings; unfortunately |
1282 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1283 | (void)SvPV_force_nomg_nolen(sv); | |
1284 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1285 | if (SvUTF8(sv)) { | |
1286 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1287 | SvUTF8_off(sv); | |
1288 | } | |
1289 | s = SvPVX(sv); | |
1290 | len = SvCUR(sv); | |
12033064 CS |
1291 | } |
1292 | my_setenv(key, s); /* does the deed */ | |
1293 | ||
a0d0e21e LW |
1294 | #ifdef DYNAMIC_ENV_FETCH |
1295 | /* We just undefd an environment var. Is a replacement */ | |
1296 | /* waiting in the wings? */ | |
1297 | if (!len) { | |
6bd66ee9 | 1298 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
fabdb6c0 | 1299 | if (valp) |
4ab59fcc | 1300 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; |
a0d0e21e LW |
1301 | } |
1302 | #endif | |
1e422769 | 1303 | |
28542d8f | 1304 | #if !defined(OS2) && !defined(WIN32) && !defined(MSDOS) |
79072805 LW |
1305 | /* And you'll never guess what the dog had */ |
1306 | /* in its mouth... */ | |
284167a5 | 1307 | if (TAINTING_get) { |
1e422769 | 1308 | MgTAINTEDDIR_off(mg); |
1309 | #ifdef VMS | |
b2aed775 | 1310 | if (s && memEQs(key, klen, "DCL$PATH")) { |
b8ffc8df | 1311 | char pathbuf[256], eltbuf[256], *cp, *elt; |
1e422769 | 1312 | int i = 0, j = 0; |
1313 | ||
6fca0082 | 1314 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); |
b8ffc8df | 1315 | elt = eltbuf; |
1e422769 | 1316 | do { /* DCL$PATH may be a search list */ |
1317 | while (1) { /* as may dev portion of any element */ | |
1318 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1319 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1320 | cando_by_name(S_IWUSR,0,elt) ) { | |
1321 | MgTAINTEDDIR_on(mg); | |
1322 | return 0; | |
1323 | } | |
1324 | } | |
bd61b366 | 1325 | if ((cp = strchr(elt, ':')) != NULL) |
1e422769 | 1326 | *cp = '\0'; |
1327 | if (my_trnlnm(elt, eltbuf, j++)) | |
1328 | elt = eltbuf; | |
1329 | else | |
1330 | break; | |
1331 | } | |
1332 | j = 0; | |
1333 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1334 | } | |
1335 | #endif /* VMS */ | |
b2aed775 | 1336 | if (s && memEQs(key, klen, "PATH")) { |
8772537c | 1337 | const char * const strend = s + len; |
463ee0b2 | 1338 | |
70b484a8 DM |
1339 | /* set MGf_TAINTEDDIR if any component of the new path is |
1340 | * relative or world-writeable */ | |
463ee0b2 | 1341 | while (s < strend) { |
96827780 | 1342 | char tmpbuf[256]; |
c623ac67 | 1343 | Stat_t st; |
5f74f29c | 1344 | I32 i; |
83269ced CB |
1345 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1346 | const char path_sep = PL_perllib_sep; | |
f5a63d97 AL |
1347 | #else |
1348 | const char path_sep = ':'; | |
1349 | #endif | |
ba0a4150 | 1350 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
427eaa01 | 1351 | s, strend, path_sep, &i); |
463ee0b2 | 1352 | s++; |
bb7a0f54 | 1353 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ |
83269ced CB |
1354 | #ifdef __VMS |
1355 | /* no colon thus no device name -- assume relative path */ | |
1356 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1357 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1358 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 CB |
1359 | #else |
1360 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ | |
1361 | #endif | |
c6ed36e1 | 1362 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
8990e307 | 1363 | MgTAINTEDDIR_on(mg); |
1e422769 | 1364 | return 0; |
1365 | } | |
463ee0b2 | 1366 | } |
79072805 LW |
1367 | } |
1368 | } | |
28542d8f | 1369 | #endif /* neither OS2 nor WIN32 nor MSDOS */ |
1e422769 | 1370 | |
79072805 LW |
1371 | return 0; |
1372 | } | |
1373 | ||
1374 | int | |
864dbfa3 | 1375 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1376 | { |
7918f24d | 1377 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1378 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1379 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1380 | return 0; |
1381 | } | |
1382 | ||
88e89b8a | 1383 | int |
864dbfa3 | 1384 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1385 | { |
7918f24d | 1386 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1387 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1388 | #if defined(VMS) |
cea2e8a9 | 1389 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1390 | #else |
3280af22 | 1391 | if (PL_localizing) { |
fb73857a | 1392 | HE* entry; |
b0269e46 | 1393 | my_clearenv(); |
85fbaab2 NC |
1394 | hv_iterinit(MUTABLE_HV(sv)); |
1395 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
fb73857a | 1396 | I32 keylen; |
1397 | my_setenv(hv_iterkey(entry, &keylen), | |
85fbaab2 | 1398 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); |
fb73857a | 1399 | } |
1400 | } | |
1401 | #endif | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | int | |
864dbfa3 | 1406 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1407 | { |
7918f24d | 1408 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1409 | PERL_UNUSED_ARG(sv); |
1410 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1411 | #if defined(VMS) |
1412 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1413 | #else | |
1414 | my_clearenv(); | |
1415 | #endif | |
3e3baf6d | 1416 | return 0; |
66b1d557 HM |
1417 | } |
1418 | ||
64ca3a65 | 1419 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1420 | #ifdef HAS_SIGPROCMASK |
1421 | static void | |
1422 | restore_sigmask(pTHX_ SV *save_sv) | |
1423 | { | |
0bd48802 | 1424 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1425 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1426 | } |
1427 | #endif | |
66b1d557 | 1428 | int |
864dbfa3 | 1429 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1430 | { |
88e89b8a | 1431 | /* Are we fetching a signal entry? */ |
708854f2 | 1432 | int i = (I16)mg->mg_private; |
7918f24d NC |
1433 | |
1434 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1435 | ||
708854f2 | 1436 | if (!i) { |
84c7b88c BF |
1437 | STRLEN siglen; |
1438 | const char * sig = MgPV_const(mg, siglen); | |
1439 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1440 | } |
1441 | ||
e02bfb16 | 1442 | if (i > 0) { |
22c35a8c GS |
1443 | if(PL_psig_ptr[i]) |
1444 | sv_setsv(sv,PL_psig_ptr[i]); | |
88e89b8a | 1445 | else { |
46da273f | 1446 | Sighandler_t sigstate = rsignal_state(i); |
23ada85b | 1447 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
46da273f AL |
1448 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1449 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1450 | #endif |
1451 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
46da273f AL |
1452 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1453 | sigstate = SIG_DFL; | |
85b332e2 | 1454 | #endif |
88e89b8a | 1455 | /* cache state so we don't fetch it again */ |
8aad04aa | 1456 | if(sigstate == (Sighandler_t) SIG_IGN) |
6502358f | 1457 | sv_setpvs(sv,"IGNORE"); |
88e89b8a | 1458 | else |
e03e82a0 | 1459 | sv_set_undef(sv); |
46da273f | 1460 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
88e89b8a | 1461 | SvTEMP_off(sv); |
1462 | } | |
1463 | } | |
1464 | return 0; | |
1465 | } | |
1466 | int | |
864dbfa3 | 1467 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1468 | { |
7918f24d | 1469 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1470 | |
38a124f0 | 1471 | magic_setsig(NULL, mg); |
179c85a2 | 1472 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1473 | } |
3d37d572 | 1474 | |
0a8e0eff | 1475 | Signal_t |
8aad04aa | 1476 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
b6455c53 | 1477 | Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) |
8aad04aa | 1478 | #else |
0a8e0eff | 1479 | Perl_csighandler(int sig) |
8aad04aa | 1480 | #endif |
0a8e0eff | 1481 | { |
1018e26f NIS |
1482 | #ifdef PERL_GET_SIG_CONTEXT |
1483 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1484 | #else | |
85b332e2 CL |
1485 | dTHX; |
1486 | #endif | |
1271a1be | 1487 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
ffb6256b JH |
1488 | #if defined(__cplusplus) && defined(__GNUC__) |
1489 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1490 | * parameters would be warned about. */ | |
1491 | PERL_UNUSED_ARG(sip); | |
1492 | PERL_UNUSED_ARG(uap); | |
1493 | #endif | |
1271a1be | 1494 | #endif |
23ada85b | 1495 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1496 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1497 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1498 | #endif |
2e34cc90 | 1499 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1500 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1501 | #ifdef KILL_BY_SIGPRC |
1502 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1503 | #else | |
1504 | exit(1); | |
1505 | #endif | |
1506 | #endif | |
406878dd | 1507 | if ( |
853d2c32 RGS |
1508 | #ifdef SIGILL |
1509 | sig == SIGILL || | |
1510 | #endif | |
1511 | #ifdef SIGBUS | |
1512 | sig == SIGBUS || | |
1513 | #endif | |
1514 | #ifdef SIGSEGV | |
1515 | sig == SIGSEGV || | |
1516 | #endif | |
1517 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) | |
4ffa73a3 | 1518 | /* Call the perl level handler now-- |
31c91b43 | 1519 | * with risk we may be in malloc() or being destructed etc. */ |
6e324d09 | 1520 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
80626cf1 | 1521 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 CB |
1522 | #else |
1523 | (*PL_sighandlerp)(sig); | |
92807b6d | 1524 | #endif |
406878dd | 1525 | else { |
31c91b43 | 1526 | if (!PL_psig_pend) return; |
406878dd GA |
1527 | /* Set a flag to say this signal is pending, that is awaiting delivery after |
1528 | * the current Perl opcode completes */ | |
1529 | PL_psig_pend[sig]++; | |
1530 | ||
1531 | #ifndef SIG_PENDING_DIE_COUNT | |
1532 | # define SIG_PENDING_DIE_COUNT 120 | |
1533 | #endif | |
fe13d51d | 1534 | /* Add one to say _a_ signal is pending */ |
406878dd GA |
1535 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) |
1536 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1537 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
1538 | } | |
0a8e0eff NIS |
1539 | } |
1540 | ||
2e34cc90 CL |
1541 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1542 | void | |
1543 | Perl_csighandler_init(void) | |
1544 | { | |
1545 | int sig; | |
27da23d5 | 1546 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1547 | |
1548 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1549 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1550 | dTHX; |
27da23d5 | 1551 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1552 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1553 | #endif |
1554 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1555 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1556 | #endif |
1557 | } | |
27da23d5 | 1558 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1559 | } |
1560 | #endif | |
1561 | ||
7fe50b8b LT |
1562 | #if defined HAS_SIGPROCMASK |
1563 | static void | |
1564 | unblock_sigmask(pTHX_ void* newset) | |
1565 | { | |
dc3bf405 | 1566 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1567 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1568 | } | |
1569 | #endif | |
1570 | ||
0a8e0eff NIS |
1571 | void |
1572 | Perl_despatch_signals(pTHX) | |
1573 | { | |
1574 | int sig; | |
1575 | PL_sig_pending = 0; | |
1576 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1577 | if (PL_psig_pend[sig]) { | |
d0166017 | 1578 | dSAVE_ERRNO; |
7fe50b8b | 1579 | #ifdef HAS_SIGPROCMASK |
55534442 LT |
1580 | /* From sigaction(2) (FreeBSD man page): |
1581 | * | Signal routines normally execute with the signal that | |
1582 | * | caused their invocation blocked, but other signals may | |
1583 | * | yet occur. | |
1584 | * Emulation of this behavior (from within Perl) is enabled | |
1585 | * using sigprocmask | |
1586 | */ | |
1587 | int was_blocked; | |
1588 | sigset_t newset, oldset; | |
1589 | ||
1590 | sigemptyset(&newset); | |
1591 | sigaddset(&newset, sig); | |
1592 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1593 | was_blocked = sigismember(&oldset, sig); | |
7fe50b8b LT |
1594 | if (!was_blocked) { |
1595 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1596 | ENTER; | |
1597 | SAVEFREESV(save_sv); | |
1598 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1599 | } | |
55534442 | 1600 | #endif |
25da4428 | 1601 | PL_psig_pend[sig] = 0; |
6e324d09 | 1602 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
80626cf1 | 1603 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 CB |
1604 | #else |
1605 | (*PL_sighandlerp)(sig); | |
92807b6d | 1606 | #endif |
7fe50b8b | 1607 | #ifdef HAS_SIGPROCMASK |
55534442 | 1608 | if (!was_blocked) |
7fe50b8b | 1609 | LEAVE; |
55534442 | 1610 | #endif |
d0166017 | 1611 | RESTORE_ERRNO; |
0a8e0eff NIS |
1612 | } |
1613 | } | |
1614 | } | |
1615 | ||
38a124f0 | 1616 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1617 | int |
864dbfa3 | 1618 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1619 | { |
27da23d5 | 1620 | dVAR; |
79072805 | 1621 | I32 i; |
cbbf8932 | 1622 | SV** svp = NULL; |
2d4fcd5e AJ |
1623 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1624 | * effects (due to closures). We must make sure that the new disposition | |
1625 | * is in place before it is called. | |
1626 | */ | |
cbbf8932 | 1627 | SV* to_dec = NULL; |
e72dc28c | 1628 | STRLEN len; |
2d4fcd5e AJ |
1629 | #ifdef HAS_SIGPROCMASK |
1630 | sigset_t set, save; | |
1631 | SV* save_sv; | |
1632 | #endif | |
eb578fdb | 1633 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1634 | |
1635 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1636 | ||
748a9306 | 1637 | if (*s == '_') { |
84c7b88c | 1638 | if (memEQs(s, len, "__DIE__")) |
3280af22 | 1639 | svp = &PL_diehook; |
84c7b88c | 1640 | else if (memEQs(s, len, "__WARN__") |
38a124f0 NC |
1641 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { |
1642 | /* Merge the existing behaviours, which are as follows: | |
1643 | magic_setsig, we always set svp to &PL_warnhook | |
1644 | (hence we always change the warnings handler) | |
1645 | For magic_clearsig, we don't change the warnings handler if it's | |
1646 | set to the &PL_warnhook. */ | |
3280af22 | 1647 | svp = &PL_warnhook; |
84c7b88c BF |
1648 | } else if (sv) { |
1649 | SV *tmp = sv_newmortal(); | |
1650 | Perl_croak(aTHX_ "No such hook: %s", | |
1651 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1652 | } | |
748a9306 | 1653 | i = 0; |
38a124f0 | 1654 | if (svp && *svp) { |
9289f461 RGS |
1655 | if (*svp != PERL_WARNHOOK_FATAL) |
1656 | to_dec = *svp; | |
cbbf8932 | 1657 | *svp = NULL; |
4633a7c4 | 1658 | } |
748a9306 LW |
1659 | } |
1660 | else { | |
708854f2 NC |
1661 | i = (I16)mg->mg_private; |
1662 | if (!i) { | |
84c7b88c | 1663 | i = whichsig_pvn(s, len); /* ...no, a brick */ |
58a26b12 | 1664 | mg->mg_private = (U16)i; |
708854f2 | 1665 | } |
86d86cad | 1666 | if (i <= 0) { |
84c7b88c BF |
1667 | if (sv) { |
1668 | SV *tmp = sv_newmortal(); | |
1669 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", | |
1670 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1671 | } | |
748a9306 LW |
1672 | return 0; |
1673 | } | |
2d4fcd5e AJ |
1674 | #ifdef HAS_SIGPROCMASK |
1675 | /* Avoid having the signal arrive at a bad time, if possible. */ | |
1676 | sigemptyset(&set); | |
1677 | sigaddset(&set,i); | |
1678 | sigprocmask(SIG_BLOCK, &set, &save); | |
1679 | ENTER; | |
9ff8e806 | 1680 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); |
2d4fcd5e AJ |
1681 | SAVEFREESV(save_sv); |
1682 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1683 | #endif | |
1684 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1685 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
27da23d5 | 1686 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1687 | #endif |
23ada85b | 1688 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
27da23d5 | 1689 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1690 | #endif |
2e34cc90 | 1691 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1692 | PL_sig_defaulting[i] = 0; |
2e34cc90 | 1693 | #endif |
2d4fcd5e | 1694 | to_dec = PL_psig_ptr[i]; |
38a124f0 NC |
1695 | if (sv) { |
1696 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1697 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
79fd3822 NC |
1698 | |
1699 | /* Signals don't change name during the program's execution, so once | |
1700 | they're cached in the appropriate slot of PL_psig_name, they can | |
1701 | stay there. | |
1702 | ||
1703 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1704 | at least, doing most of the work. */ | |
1705 | if (!PL_psig_name[i]) { | |
1706 | PL_psig_name[i] = newSVpvn(s, len); | |
1707 | SvREADONLY_on(PL_psig_name[i]); | |
1708 | } | |
38a124f0 | 1709 | } else { |
79fd3822 | 1710 | SvREFCNT_dec(PL_psig_name[i]); |
38a124f0 NC |
1711 | PL_psig_name[i] = NULL; |
1712 | PL_psig_ptr[i] = NULL; | |
1713 | } | |
748a9306 | 1714 | } |
38a124f0 | 1715 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
2d4fcd5e | 1716 | if (i) { |
5c1546dc | 1717 | (void)rsignal(i, PL_csighandlerp); |
2d4fcd5e | 1718 | } |
748a9306 | 1719 | else |
b37c2d43 | 1720 | *svp = SvREFCNT_inc_simple_NN(sv); |
38a124f0 | 1721 | } else { |
9dfa190b NC |
1722 | if (sv && SvOK(sv)) { |
1723 | s = SvPV_force(sv, len); | |
1724 | } else { | |
1725 | sv = NULL; | |
1726 | } | |
84c7b88c | 1727 | if (sv && memEQs(s, len,"IGNORE")) { |
9dfa190b | 1728 | if (i) { |
23ada85b | 1729 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
9dfa190b NC |
1730 | PL_sig_ignoring[i] = 1; |
1731 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1732 | #else |
9dfa190b | 1733 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1734 | #endif |
9dfa190b | 1735 | } |
2d4fcd5e | 1736 | } |
84c7b88c | 1737 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { |
9dfa190b | 1738 | if (i) { |
2e34cc90 | 1739 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
9dfa190b NC |
1740 | PL_sig_defaulting[i] = 1; |
1741 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1742 | #else |
9dfa190b | 1743 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
2e34cc90 | 1744 | #endif |
9dfa190b NC |
1745 | } |
1746 | } | |
1747 | else { | |
1748 | /* | |
1749 | * We should warn if HINT_STRICT_REFS, but without | |
1750 | * access to a known hint bit in a known OP, we can't | |
1751 | * tell whether HINT_STRICT_REFS is in force or not. | |
1752 | */ | |
1753 | if (!strchr(s,':') && !strchr(s,'\'')) | |
1754 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), | |
1755 | SV_GMAGIC); | |
1756 | if (i) | |
1757 | (void)rsignal(i, PL_csighandlerp); | |
1758 | else | |
1759 | *svp = SvREFCNT_inc_simple_NN(sv); | |
136e0459 | 1760 | } |
748a9306 | 1761 | } |
9dfa190b | 1762 | |
2d4fcd5e AJ |
1763 | #ifdef HAS_SIGPROCMASK |
1764 | if(i) | |
1765 | LEAVE; | |
1766 | #endif | |
ef8d46e8 | 1767 | SvREFCNT_dec(to_dec); |
79072805 LW |
1768 | return 0; |
1769 | } | |
64ca3a65 | 1770 | #endif /* !PERL_MICRO */ |
79072805 LW |
1771 | |
1772 | int | |
864dbfa3 | 1773 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1774 | { |
7918f24d | 1775 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1776 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1777 | |
89c14e2e | 1778 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1779 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
89c14e2e BB |
1780 | return 0; |
1781 | ||
0e446081 | 1782 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1783 | } |
1784 | ||
0e446081 | 1785 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1786 | int |
52b45067 RD |
1787 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1788 | { | |
52b45067 | 1789 | HV* stash; |
7918f24d NC |
1790 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1791 | ||
52b45067 | 1792 | /* Bail out if destruction is going on */ |
627364f1 | 1793 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1794 | |
0e446081 NC |
1795 | if (sv) |
1796 | av_clear(MUTABLE_AV(sv)); | |
52b45067 | 1797 | |
6624142a FC |
1798 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1799 | /* This occurs with setisa_elem magic, which calls this | |
1800 | same function. */ | |
1801 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
1802 | ||
316ebaf2 | 1803 | assert(mg); |
6624142a FC |
1804 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1805 | SV **svp = AvARRAY((AV *)mg->mg_obj); | |
1806 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1807 | while (items--) { | |
1808 | stash = GvSTASH((GV *)*svp++); | |
1809 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1810 | } | |
1811 | ||
1812 | return 0; | |
1813 | } | |
1814 | ||
52b45067 | 1815 | stash = GvSTASH( |
6624142a | 1816 | (const GV *)mg->mg_obj |
52b45067 RD |
1817 | ); |
1818 | ||
00169e2c FC |
1819 | /* The stash may have been detached from the symbol table, so check its |
1820 | name before doing anything. */ | |
1821 | if (stash && HvENAME_get(stash)) | |
5562fa71 | 1822 | mro_isa_changed_in(stash); |
52b45067 RD |
1823 | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | int | |
864dbfa3 | 1828 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1829 | { |
85fbaab2 | 1830 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1831 | I32 i = 0; |
7918f24d NC |
1832 | |
1833 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1834 | PERL_UNUSED_ARG(mg); |
7719e241 | 1835 | |
6ff81951 | 1836 | if (hv) { |
497b47a8 | 1837 | (void) hv_iterinit(hv); |
ad64d0ec | 1838 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1b95d04f | 1839 | i = HvUSEDKEYS(hv); |
497b47a8 JH |
1840 | else { |
1841 | while (hv_iternext(hv)) | |
1842 | i++; | |
1843 | } | |
6ff81951 GS |
1844 | } |
1845 | ||
1846 | sv_setiv(sv, (IV)i); | |
1847 | return 0; | |
1848 | } | |
1849 | ||
1850 | int | |
864dbfa3 | 1851 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1852 | { |
7918f24d | 1853 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1854 | PERL_UNUSED_ARG(mg); |
946ec16e | 1855 | if (LvTARG(sv)) { |
85fbaab2 | 1856 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e | 1857 | } |
1858 | return 0; | |
ac27b0f5 | 1859 | } |
946ec16e | 1860 | |
efaf3674 DM |
1861 | /* |
1862 | =for apidoc magic_methcall | |
1863 | ||
1864 | Invoke a magic method (like FETCH). | |
1865 | ||
2baee27b FC |
1866 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1867 | ||
1868 | C<meth> is the name of the method to call. | |
1869 | ||
1870 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1871 | ||
1872 | The C<flags> can be: | |
1873 | ||
1874 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1875 | return a value | |
1876 | G_UNDEF_FILL fill the stack with argc pointers to | |
1877 | PL_sv_undef | |
1878 | ||
1879 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1880 | |
796b6530 | 1881 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1882 | |
1883 | ||
1884 | =cut | |
1885 | */ | |
1886 | ||
1887 | SV* | |
36925d9e | 1888 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
046b0c7d | 1889 | U32 argc, ...) |
a0d0e21e LW |
1890 | { |
1891 | dSP; | |
efaf3674 | 1892 | SV* ret = NULL; |
463ee0b2 | 1893 | |
7918f24d NC |
1894 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1895 | ||
efaf3674 | 1896 | ENTER; |
d1d7a15d NC |
1897 | |
1898 | if (flags & G_WRITING_TO_STDERR) { | |
1899 | SAVETMPS; | |
1900 | ||
2782061f | 1901 | save_re_context(); |
d1d7a15d NC |
1902 | SAVESPTR(PL_stderrgv); |
1903 | PL_stderrgv = NULL; | |
1904 | } | |
1905 | ||
efaf3674 | 1906 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1907 | PUSHMARK(SP); |
efaf3674 | 1908 | |
052a7c76 DM |
1909 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1910 | assert(argc <= I32_MAX); | |
1911 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1912 | PUSHs(SvTIED_obj(sv, mg)); |
1913 | if (flags & G_UNDEF_FILL) { | |
1914 | while (argc--) { | |
efaf3674 | 1915 | PUSHs(&PL_sv_undef); |
93965878 | 1916 | } |
67549bd2 | 1917 | } else if (argc > 0) { |
046b0c7d NC |
1918 | va_list args; |
1919 | va_start(args, argc); | |
1920 | ||
1921 | do { | |
1922 | SV *const sv = va_arg(args, SV *); | |
1923 | PUSHs(sv); | |
1924 | } while (--argc); | |
1925 | ||
1926 | va_end(args); | |
88e89b8a | 1927 | } |
463ee0b2 | 1928 | PUTBACK; |
efaf3674 | 1929 | if (flags & G_DISCARD) { |
36925d9e | 1930 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1931 | } |
1932 | else { | |
36925d9e | 1933 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
efaf3674 DM |
1934 | ret = *PL_stack_sp--; |
1935 | } | |
1936 | POPSTACK; | |
d1d7a15d NC |
1937 | if (flags & G_WRITING_TO_STDERR) |
1938 | FREETMPS; | |
efaf3674 DM |
1939 | LEAVE; |
1940 | return ret; | |
1941 | } | |
1942 | ||
efaf3674 | 1943 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 1944 | |
efaf3674 | 1945 | STATIC SV* |
36925d9e | 1946 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
1947 | int n, SV *val) |
1948 | { | |
efaf3674 DM |
1949 | SV* arg1 = NULL; |
1950 | ||
1951 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
1952 | ||
1953 | if (mg->mg_ptr) { | |
1954 | if (mg->mg_len >= 0) { | |
db4b3a1d | 1955 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
efaf3674 DM |
1956 | } |
1957 | else if (mg->mg_len == HEf_SVKEY) | |
1958 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
1959 | } | |
1960 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
db4b3a1d | 1961 | arg1 = newSViv((IV)(mg->mg_len)); |
efaf3674 DM |
1962 | sv_2mortal(arg1); |
1963 | } | |
1964 | if (!arg1) { | |
046b0c7d | 1965 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 1966 | } |
046b0c7d | 1967 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e | 1968 | } |
1969 | ||
76e3520e | 1970 | STATIC int |
36925d9e | 1971 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 1972 | { |
efaf3674 | 1973 | SV* ret; |
463ee0b2 | 1974 | |
7918f24d NC |
1975 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
1976 | ||
efaf3674 DM |
1977 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
1978 | if (ret) | |
1979 | sv_setsv(sv, ret); | |
a0d0e21e LW |
1980 | return 0; |
1981 | } | |
463ee0b2 | 1982 | |
a0d0e21e | 1983 | int |
864dbfa3 | 1984 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 1985 | { |
7918f24d NC |
1986 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
1987 | ||
fd69380d | 1988 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
a0d0e21e | 1989 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 1990 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
1991 | return 0; |
1992 | } | |
1993 | ||
1994 | int | |
864dbfa3 | 1995 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 1996 | { |
b112cff9 DM |
1997 | MAGIC *tmg; |
1998 | SV *val; | |
7918f24d NC |
1999 | |
2000 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2001 | ||
b112cff9 DM |
2002 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2003 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2004 | * public flags indicate its value based on copying from $val. Doing | |
2005 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2006 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2007 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2008 | * enabled, even though taint magic is in the chain. In which case, | |
2009 | * fake up a temporary tainted value (this is easier than temporarily | |
2010 | * re-enabling magic on sv). */ | |
2011 | ||
284167a5 | 2012 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
b112cff9 DM |
2013 | && (tmg->mg_len & 1)) |
2014 | { | |
2015 | val = sv_mortalcopy(sv); | |
2016 | SvTAINTED_on(val); | |
2017 | } | |
2018 | else | |
2019 | val = sv; | |
2020 | ||
36925d9e | 2021 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2022 | return 0; |
2023 | } | |
2024 | ||
2025 | int | |
864dbfa3 | 2026 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2027 | { |
7918f24d NC |
2028 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2029 | ||
4c13be3f | 2030 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2031 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2032 | } |
463ee0b2 | 2033 | |
93965878 NIS |
2034 | |
2035 | U32 | |
864dbfa3 | 2036 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2037 | { |
22846ab4 | 2038 | I32 retval = 0; |
efaf3674 | 2039 | SV* retsv; |
93965878 | 2040 | |
7918f24d NC |
2041 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2042 | ||
36925d9e | 2043 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 DM |
2044 | if (retsv) { |
2045 | retval = SvIV(retsv)-1; | |
22846ab4 AB |
2046 | if (retval < -1) |
2047 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2048 | } |
22846ab4 | 2049 | return (U32) retval; |
93965878 NIS |
2050 | } |
2051 | ||
cea2e8a9 GS |
2052 | int |
2053 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2054 | { |
7918f24d NC |
2055 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2056 | ||
36925d9e | 2057 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2058 | return 0; |
2059 | } | |
2060 | ||
2061 | int | |
864dbfa3 | 2062 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2063 | { |
efaf3674 | 2064 | SV* ret; |
463ee0b2 | 2065 | |
7918f24d NC |
2066 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2067 | ||
36925d9e RZ |
2068 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
2069 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); | |
efaf3674 DM |
2070 | if (ret) |
2071 | sv_setsv(key,ret); | |
79072805 LW |
2072 | return 0; |
2073 | } | |
2074 | ||
2075 | int | |
1146e912 | 2076 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2077 | { |
7918f24d NC |
2078 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2079 | ||
36925d9e | 2080 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2081 | } |
a0d0e21e | 2082 | |
a3bcc51e TP |
2083 | SV * |
2084 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2085 | { | |
5fcbf73d | 2086 | SV *retval; |
ad64d0ec NC |
2087 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2088 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2089 | |
7918f24d NC |
2090 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2091 | ||
a3bcc51e TP |
2092 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2093 | SV *key; | |
bfcb3514 | 2094 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2095 | /* we are in an iteration so the hash cannot be empty */ |
2096 | return &PL_sv_yes; | |
2097 | /* no xhv_eiter so now use FIRSTKEY */ | |
2098 | key = sv_newmortal(); | |
ad64d0ec | 2099 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2100 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2101 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2102 | } | |
2103 | ||
2104 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2105 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2106 | if (!retval) |
5fcbf73d | 2107 | retval = &PL_sv_undef; |
a3bcc51e TP |
2108 | return retval; |
2109 | } | |
2110 | ||
a0d0e21e | 2111 | int |
864dbfa3 | 2112 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2113 | { |
089b5c60 | 2114 | SV **svp; |
7918f24d NC |
2115 | |
2116 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2117 | ||
089b5c60 NC |
2118 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2119 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2120 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2121 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2122 | } |
2123 | ||
2124 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2125 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a FC |
2126 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
2127 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); | |
089b5c60 | 2128 | |
8772537c | 2129 | if (svp && SvIOKp(*svp)) { |
88df5f01 FC |
2130 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2131 | if (o) { | |
2132 | #ifdef PERL_DEBUG_READONLY_OPS | |
2133 | Slab_to_rw(OpSLAB(o)); | |
2134 | #endif | |
2135 | /* set or clear breakpoint in the relevant control op */ | |
089b5c60 | 2136 | if (SvTRUE(sv)) |
88df5f01 | 2137 | o->op_flags |= OPf_SPECIAL; |
8772537c | 2138 | else |
88df5f01 FC |
2139 | o->op_flags &= ~OPf_SPECIAL; |
2140 | #ifdef PERL_DEBUG_READONLY_OPS | |
2141 | Slab_to_ro(OpSLAB(o)); | |
2142 | #endif | |
8772537c | 2143 | } |
5df8de69 | 2144 | } |
79072805 LW |
2145 | return 0; |
2146 | } | |
2147 | ||
2148 | int | |
8772537c | 2149 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2150 | { |
502c6561 | 2151 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2152 | |
2153 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2154 | ||
83bf042f | 2155 | if (obj) { |
e1dccc0d | 2156 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2157 | } else { |
3773545d | 2158 | sv_set_undef(sv); |
83bf042f | 2159 | } |
79072805 LW |
2160 | return 0; |
2161 | } | |
2162 | ||
2163 | int | |
864dbfa3 | 2164 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2165 | { |
502c6561 | 2166 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2167 | |
2168 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2169 | ||
83bf042f | 2170 | if (obj) { |
e1dccc0d | 2171 | av_fill(obj, SvIV(sv)); |
83bf042f | 2172 | } else { |
a2a5de95 NC |
2173 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2174 | "Attempt to set length of freed array"); | |
83bf042f NC |
2175 | } |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | int | |
83f29afa VP |
2180 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2181 | { | |
83f29afa VP |
2182 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2183 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2184 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2185 | |
2186 | /* Reset the iterator when the array is cleared */ | |
3565fbf3 VP |
2187 | #if IVSIZE == I32SIZE |
2188 | *((IV *) &(mg->mg_len)) = 0; | |
2189 | #else | |
83f29afa VP |
2190 | if (mg->mg_ptr) |
2191 | *((IV *) mg->mg_ptr) = 0; | |
3565fbf3 | 2192 | #endif |
83f29afa VP |
2193 | |
2194 | return 0; | |
2195 | } | |
2196 | ||
2197 | int | |
83bf042f NC |
2198 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2199 | { | |
7918f24d | 2200 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2201 | PERL_UNUSED_ARG(sv); |
7918f24d | 2202 | |
94f3782b DM |
2203 | /* during global destruction, mg_obj may already have been freed */ |
2204 | if (PL_in_clean_all) | |
1ea47f64 | 2205 | return 0; |
94f3782b | 2206 | |
83bf042f NC |
2207 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2208 | ||
2209 | if (mg) { | |
2210 | /* arylen scalar holds a pointer back to the array, but doesn't own a | |
2211 | reference. Hence the we (the array) are about to go away with it | |
2212 | still pointing at us. Clear its pointer, else it would be pointing | |
2213 | at free memory. See the comment in sv_magic about reference loops, | |
2214 | and why it can't own a reference to us. */ | |
2215 | mg->mg_obj = 0; | |
2216 | } | |
a0d0e21e LW |
2217 | return 0; |
2218 | } | |
2219 | ||
2220 | int | |
864dbfa3 | 2221 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2222 | { |
16eb5365 | 2223 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2224 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2225 | |
2226 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2227 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2228 | |
6174b39a FC |
2229 | if (found && found->mg_len != -1) { |
2230 | STRLEN i = found->mg_len; | |
25fdce4a | 2231 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) |
6174b39a FC |
2232 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); |
2233 | sv_setuv(sv, i); | |
a0d0e21e | 2234 | return 0; |
a0d0e21e | 2235 | } |
3773545d | 2236 | sv_set_undef(sv); |
a0d0e21e LW |
2237 | return 0; |
2238 | } | |
2239 | ||
2240 | int | |
864dbfa3 | 2241 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2242 | { |
16eb5365 | 2243 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2244 | SSize_t pos; |
2245 | STRLEN len; | |
53d44271 | 2246 | MAGIC* found; |
aec43834 | 2247 | const char *s; |
a0d0e21e | 2248 | |
7918f24d | 2249 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2250 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2251 | |
96c2a8ff | 2252 | found = mg_find_mglob(lsv); |
3881461a | 2253 | if (!found) { |
a0d0e21e LW |
2254 | if (!SvOK(sv)) |
2255 | return 0; | |
96c2a8ff | 2256 | found = sv_magicext_mglob(lsv); |
a0d0e21e LW |
2257 | } |
2258 | else if (!SvOK(sv)) { | |
3881461a | 2259 | found->mg_len = -1; |
a0d0e21e LW |
2260 | return 0; |
2261 | } | |
aec43834 | 2262 | s = SvPV_const(lsv, len); |
a0d0e21e | 2263 | |
e1dccc0d | 2264 | pos = SvIV(sv); |
a0ed51b3 | 2265 | |
7e2040f0 | 2266 | if (DO_UTF8(lsv)) { |
19742f39 | 2267 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
a0ed51b3 LW |
2268 | if (ulen) |
2269 | len = ulen; | |
a0ed51b3 LW |
2270 | } |
2271 | ||
a0d0e21e LW |
2272 | if (pos < 0) { |
2273 | pos += len; | |
2274 | if (pos < 0) | |
2275 | pos = 0; | |
2276 | } | |
eb160463 | 2277 | else if (pos > (SSize_t)len) |
a0d0e21e | 2278 | pos = len; |
a0ed51b3 | 2279 | |
3881461a | 2280 | found->mg_len = pos; |
25fdce4a | 2281 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2282 | |
79072805 LW |
2283 | return 0; |
2284 | } | |
2285 | ||
2286 | int | |
864dbfa3 | 2287 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2288 | { |
2289 | STRLEN len; | |
35a4481c | 2290 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2291 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2292 | STRLEN offs = LvTARGOFF(sv); |
2293 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2294 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2295 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2296 | |
2297 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2298 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2299 | |
83f78d1a | 2300 | if (!translate_substr_offsets( |
4ddea69a | 2301 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
83f78d1a FC |
2302 | negoff ? -(IV)offs : (IV)offs, !negoff, |
2303 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
2304 | )) { | |
2305 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); | |
e03e82a0 | 2306 | sv_set_undef(sv); |
83f78d1a FC |
2307 | return 0; |
2308 | } | |
2309 | ||
9aa983d2 | 2310 | if (SvUTF8(lsv)) |
4ddea69a | 2311 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2312 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2313 | if (SvUTF8(lsv)) |
2ef4b674 | 2314 | SvUTF8_on(sv); |
6ff81951 GS |
2315 | return 0; |
2316 | } | |
2317 | ||
2318 | int | |
864dbfa3 | 2319 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2320 | { |
83f78d1a | 2321 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2322 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2323 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2324 | STRLEN lvoff = LvTARGOFF(sv); |
2325 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2326 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2327 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2328 | |
2329 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2330 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2331 | |
a74fb2cd FC |
2332 | SvGETMAGIC(lsv); |
2333 | if (SvROK(lsv)) | |
2334 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), | |
2335 | "Attempt to use reference as lvalue in substr" | |
2336 | ); | |
fc061ed8 FC |
2337 | SvPV_force_nomg(lsv,lsv_len); |
2338 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a FC |
2339 | if (!translate_substr_offsets( |
2340 | lsv_len, | |
2341 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2342 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
2343 | )) | |
2344 | Perl_croak(aTHX_ "substr outside of string"); | |
2345 | oldtarglen = lvlen; | |
1aa99e6b | 2346 | if (DO_UTF8(sv)) { |
73a087f0 | 2347 | sv_utf8_upgrade_nomg(lsv); |
d931b1be | 2348 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
a74fb2cd | 2349 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
7a385470 | 2350 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); |
9aa983d2 JH |
2351 | SvUTF8_on(lsv); |
2352 | } | |
0d336106 | 2353 | else if (SvUTF8(lsv)) { |
5fcbf73d | 2354 | const char *utf8; |
d931b1be | 2355 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
83f78d1a | 2356 | newtarglen = len; |
5fcbf73d | 2357 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); |
a74fb2cd | 2358 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); |
5fcbf73d | 2359 | Safefree(utf8); |
1aa99e6b | 2360 | } |
b76f3ce2 | 2361 | else { |
a74fb2cd | 2362 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
83f78d1a | 2363 | newtarglen = len; |
b76f3ce2 | 2364 | } |
83f78d1a FC |
2365 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2366 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2367 | |
79072805 LW |
2368 | return 0; |
2369 | } | |
2370 | ||
2371 | int | |
864dbfa3 | 2372 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2373 | { |
7918f24d | 2374 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2375 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2376 | #ifdef NO_TAINT_SUPPORT |
2377 | PERL_UNUSED_ARG(mg); | |
2378 | #endif | |
7918f24d | 2379 | |
64ff300b | 2380 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2381 | return 0; |
2382 | } | |
2383 | ||
2384 | int | |
864dbfa3 | 2385 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2386 | { |
7918f24d | 2387 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2388 | PERL_UNUSED_ARG(sv); |
7918f24d | 2389 | |
b01e650a | 2390 | /* update taint status */ |
284167a5 | 2391 | if (TAINT_get) |
b01e650a DM |
2392 | mg->mg_len |= 1; |
2393 | else | |
2394 | mg->mg_len &= ~1; | |
463ee0b2 LW |
2395 | return 0; |
2396 | } | |
2397 | ||
2398 | int | |
864dbfa3 | 2399 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2400 | { |
35a4481c | 2401 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2402 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2403 | |
2404 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2405 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2406 | |
1b92e694 | 2407 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2408 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2409 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2410 | |
6ff81951 GS |
2411 | return 0; |
2412 | } | |
2413 | ||
2414 | int | |
864dbfa3 | 2415 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2416 | { |
7918f24d | 2417 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2418 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2419 | do_vecset(sv); /* XXX slurp this routine */ |
2420 | return 0; | |
2421 | } | |
2422 | ||
13733cde FC |
2423 | SV * |
2424 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2425 | { |
a0714e2c | 2426 | SV *targ = NULL; |
13733cde FC |
2427 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2428 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2429 | assert(mg); | |
5f05dabc | 2430 | if (LvTARGLEN(sv)) { |
68dc0745 | 2431 | if (mg->mg_obj) { |
8772537c | 2432 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2433 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); |
6d822dc4 MS |
2434 | if (he) |
2435 | targ = HeVAL(he); | |
68dc0745 | 2436 | } |
bbfdc870 | 2437 | else if (LvSTARGOFF(sv) >= 0) { |
502c6561 | 2438 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2439 | if (LvSTARGOFF(sv) <= AvFILL(av)) |
ca58dfd9 FC |
2440 | { |
2441 | if (SvRMAGICAL(av)) { | |
2442 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2443 | targ = svp ? *svp : NULL; | |
2444 | } | |
2445 | else | |
bbfdc870 | 2446 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; |
ca58dfd9 | 2447 | } |
68dc0745 | 2448 | } |
46da273f | 2449 | if (targ && (targ != &PL_sv_undef)) { |
68dc0745 | 2450 | /* somebody else defined it for us */ |
2451 | SvREFCNT_dec(LvTARG(sv)); | |
b37c2d43 | 2452 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); |
68dc0745 | 2453 | LvTARGLEN(sv) = 0; |
2454 | SvREFCNT_dec(mg->mg_obj); | |
a0714e2c | 2455 | mg->mg_obj = NULL; |
68dc0745 | 2456 | mg->mg_flags &= ~MGf_REFCOUNTED; |
2457 | } | |
13733cde | 2458 | return targ; |
5f05dabc | 2459 | } |
71be2cbc | 2460 | else |
13733cde FC |
2461 | return LvTARG(sv); |
2462 | } | |
2463 | ||
2464 | int | |
2465 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2466 | { | |
2467 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2468 | ||
2469 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc | 2470 | return 0; |
2471 | } | |
2472 | ||
2473 | int | |
864dbfa3 | 2474 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2475 | { |
7918f24d | 2476 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2477 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2478 | if (LvTARGLEN(sv)) |
68dc0745 | 2479 | vivify_defelem(sv); |
2480 | if (LvTARG(sv)) { | |
5f05dabc | 2481 | sv_setsv(LvTARG(sv), sv); |
68dc0745 | 2482 | SvSETMAGIC(LvTARG(sv)); |
2483 | } | |
5f05dabc | 2484 | return 0; |
2485 | } | |
2486 | ||
71be2cbc | 2487 | void |
864dbfa3 | 2488 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2489 | { |
74e13ce4 | 2490 | MAGIC *mg; |
a0714e2c | 2491 | SV *value = NULL; |
71be2cbc | 2492 | |
7918f24d NC |
2493 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2494 | ||
14befaf4 | 2495 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
71be2cbc | 2496 | return; |
68dc0745 | 2497 | if (mg->mg_obj) { |
8772537c | 2498 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2499 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); |
6d822dc4 MS |
2500 | if (he) |
2501 | value = HeVAL(he); | |
3280af22 | 2502 | if (!value || value == &PL_sv_undef) |
be2597df | 2503 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); |
71be2cbc | 2504 | } |
bbfdc870 FC |
2505 | else if (LvSTARGOFF(sv) < 0) |
2506 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
68dc0745 | 2507 | else { |
502c6561 | 2508 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2509 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) |
a0714e2c | 2510 | LvTARG(sv) = NULL; /* array can't be extended */ |
68dc0745 | 2511 | else { |
bbfdc870 | 2512 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); |
031c6d82 | 2513 | if (!svp || !(value = *svp)) |
bbfdc870 | 2514 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 | 2515 | } |
2516 | } | |
b37c2d43 | 2517 | SvREFCNT_inc_simple_void(value); |
68dc0745 | 2518 | SvREFCNT_dec(LvTARG(sv)); |
2519 | LvTARG(sv) = value; | |
71be2cbc | 2520 | LvTARGLEN(sv) = 0; |
68dc0745 | 2521 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2522 | mg->mg_obj = NULL; |
68dc0745 | 2523 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc | 2524 | } |
2525 | ||
2526 | int | |
864dbfa3 | 2527 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2528 | { |
7918f24d | 2529 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2530 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2531 | return 0; | |
810b8aa5 GS |
2532 | } |
2533 | ||
2534 | int | |
864dbfa3 | 2535 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2536 | { |
7918f24d | 2537 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2538 | PERL_UNUSED_CONTEXT; |
0177730e | 2539 | PERL_UNUSED_ARG(sv); |
565764a8 | 2540 | mg->mg_len = -1; |
93a17b20 LW |
2541 | return 0; |
2542 | } | |
2543 | ||
2544 | int | |
864dbfa3 | 2545 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2546 | { |
35a4481c | 2547 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2548 | |
7918f24d NC |
2549 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2550 | ||
79072805 | 2551 | if (uf && uf->uf_set) |
24f81a43 | 2552 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2553 | return 0; |
2554 | } | |
2555 | ||
c277df42 | 2556 | int |
faf82a0b AE |
2557 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2558 | { | |
488344d2 | 2559 | const char type = mg->mg_type; |
7918f24d NC |
2560 | |
2561 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2562 | ||
a5c7cb08 DM |
2563 | assert( type == PERL_MAGIC_fm |
2564 | || type == PERL_MAGIC_qr | |
2565 | || type == PERL_MAGIC_bm); | |
488344d2 | 2566 | return sv_unmagic(sv, type); |
faf82a0b AE |
2567 | } |
2568 | ||
7a4c00b4 | 2569 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2570 | int |
864dbfa3 | 2571 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2572 | { |
7918f24d NC |
2573 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2574 | ||
bbce6d69 | 2575 | /* |
838b5b74 | 2576 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 | 2577 | * and vanished with a faint plop. |
2578 | */ | |
96a5add6 | 2579 | PERL_UNUSED_CONTEXT; |
8772537c | 2580 | PERL_UNUSED_ARG(sv); |
7a4c00b4 | 2581 | if (mg->mg_ptr) { |
2582 | Safefree(mg->mg_ptr); | |
2583 | mg->mg_ptr = NULL; | |
565764a8 | 2584 | mg->mg_len = -1; |
7a4c00b4 | 2585 | } |
bbce6d69 | 2586 | return 0; |
2587 | } | |
7a4c00b4 | 2588 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2589 | |
7e8c5dac HS |
2590 | /* Just clear the UTF-8 cache data. */ |
2591 | int | |
2592 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2593 | { | |
7918f24d | 2594 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2595 | PERL_UNUSED_CONTEXT; |
8772537c | 2596 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2597 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2598 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2599 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2600 | return 0; | |
2601 | } | |
2602 | ||
bbce6d69 | 2603 | int |
9cce4f9a FC |
2604 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2605 | { | |
9782ce69 | 2606 | const char *bad = NULL; |
9cce4f9a | 2607 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2608 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2609 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2610 | case OPpLVREF_SV: | |
2611 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) | |
2612 | bad = " SCALAR"; | |
2613 | break; | |
2614 | case OPpLVREF_AV: | |
2615 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) | |
2616 | bad = "n ARRAY"; | |
2617 | break; | |
2618 | case OPpLVREF_HV: | |
2619 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) | |
2620 | bad = " HASH"; | |
2621 | break; | |
2622 | case OPpLVREF_CV: | |
2623 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) | |
2624 | bad = " CODE"; | |
2625 | } | |
2626 | if (bad) | |
26a50d99 | 2627 | /* diag_listed_as: Assigned value is not %s reference */ |
9782ce69 | 2628 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); |
c146a62a FC |
2629 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2630 | case 0: | |
2631 | { | |
2632 | SV * const old = PAD_SV(mg->mg_len); | |
2633 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2634 | SvREFCNT_dec(old); | |
2635 | break; | |
2636 | } | |
2637 | case SVt_PVGV: | |
2638 | gv_setref(mg->mg_obj, sv); | |
2639 | SvSETMAGIC(mg->mg_obj); | |
6102323a FC |
2640 | break; |
2641 | case SVt_PVAV: | |
2642 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), | |
2643 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
5f94141d FC |
2644 | break; |
2645 | case SVt_PVHV: | |
7fcb36d5 JH |
2646 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
2647 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); | |
c146a62a | 2648 | } |
d39c26a6 FC |
2649 | if (mg->mg_flags & MGf_PERSIST) |
2650 | NOOP; /* This sv is in use as an iterator var and will be reused, | |
2651 | so we must leave the magic. */ | |
2652 | else | |
2653 | /* This sv could be returned by the assignment op, so clear the | |
2654 | magic, as lvrefs are an implementation detail that must not be | |
2655 | leaked to the user. */ | |
2656 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2657 | return 0; |
2658 | } | |
2659 | ||
f1540bed JH |
2660 | static void |
2661 | S_set_dollarzero(pTHX_ SV *sv) | |
2662 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2663 | { | |
2664 | #ifdef USE_ITHREADS | |
2665 | dVAR; | |
2666 | #endif | |
2667 | const char *s; | |
2668 | STRLEN len; | |
f1540bed JH |
2669 | #ifdef HAS_SETPROCTITLE |
2670 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2671 | * show a string from the process struct and provide | |
2672 | * the setproctitle() routine to manipulate that. */ | |
2673 | if (PL_origalen != 1) { | |
2674 | s = SvPV_const(sv, len); | |
38626956 | 2675 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2676 | /* The leading "-" removes the "perl: " prefix, |
2677 | * but not the "(perl) suffix from the ps(1) | |
2678 | * output, because that's what ps(1) shows if the | |
2679 | * argv[] is modified. */ | |
2680 | setproctitle("-%s", s); | |
2681 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2682 | /* This doesn't really work if you assume that | |
2683 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2684 | * because in ps(1) output the result will be like | |
2685 | * sprintf("perl: %s (perl)", s) | |
2686 | * I guess this is a security feature: | |
2687 | * one (a user process) cannot get rid of the original name. | |
2688 | * --jhi */ | |
2689 | setproctitle("%s", s); | |
2690 | # endif | |
2691 | } | |
2692 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2693 | if (PL_origalen != 1) { | |
2694 | union pstun un; | |
2695 | s = SvPV_const(sv, len); | |
2696 | un.pst_command = (char *)s; | |
2697 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2698 | } | |
2699 | #else | |
2700 | if (PL_origalen > 1) { | |
4f3e04fd | 2701 | I32 i; |
f1540bed JH |
2702 | /* PL_origalen is set in perl_parse(). */ |
2703 | s = SvPV_force(sv,len); | |
2704 | if (len >= (STRLEN)PL_origalen-1) { | |
2705 | /* Longer than original, will be truncated. We assume that | |
2706 | * PL_origalen bytes are available. */ | |
2707 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2708 | } | |
2709 | else { | |
2710 | /* Shorter than original, will be padded. */ | |
2711 | #ifdef PERL_DARWIN | |
2712 | /* Special case for Mac OS X: see [perl #38868] */ | |
2713 | const int pad = 0; | |
2714 | #else | |
2715 | /* Is the space counterintuitive? Yes. | |
2716 | * (You were expecting \0?) | |
2717 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2718 | * --jhi */ | |
2719 | const int pad = ' '; | |
2720 | #endif | |
2721 | Copy(s, PL_origargv[0], len, char); | |
2722 | PL_origargv[0][len] = 0; | |
2723 | memset(PL_origargv[0] + len + 1, | |
2724 | pad, PL_origalen - len - 1); | |
2725 | } | |
2726 | PL_origargv[0][PL_origalen-1] = 0; | |
2727 | for (i = 1; i < PL_origargc; i++) | |
2728 | PL_origargv[i] = 0; | |
2729 | #ifdef HAS_PRCTL_SET_NAME | |
2730 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2731 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2732 | /* diag_listed_as: SKIPME */ | |
2733 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2734 | } | |
2735 | #endif | |
2736 | } | |
2737 | #endif | |
2738 | } | |
2739 | ||
9cce4f9a | 2740 | int |
864dbfa3 | 2741 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2742 | { |
20b7effb | 2743 | #ifdef USE_ITHREADS |
97aff369 | 2744 | dVAR; |
20b7effb | 2745 | #endif |
eb578fdb KW |
2746 | I32 paren; |
2747 | const REGEXP * rx; | |
79072805 | 2748 | I32 i; |
8990e307 | 2749 | STRLEN len; |
125b9982 | 2750 | MAGIC *tmg; |
2fdbfb4d | 2751 | |
7918f24d NC |
2752 | PERL_ARGS_ASSERT_MAGIC_SET; |
2753 | ||
e91d8259 | 2754 | if (!mg->mg_ptr) { |
960b831f | 2755 | paren = mg->mg_len; |
1e05feb3 | 2756 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2757 | setparen_got_rx: |
2fdbfb4d | 2758 | CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv); |
1e05feb3 | 2759 | } else { |
2fdbfb4d AB |
2760 | /* Croak with a READONLY error when a numbered match var is |
2761 | * set without a previous pattern match. Unless it's C<local $1> | |
2762 | */ | |
e91d8259 | 2763 | croakparen: |
2fdbfb4d | 2764 | if (!PL_localizing) { |
cb077ed2 | 2765 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2766 | } |
2767 | } | |
e91d8259 NC |
2768 | return 0; |
2769 | } | |
2770 | ||
2771 | switch (*mg->mg_ptr) { | |
748a9306 | 2772 | case '\001': /* ^A */ |
f2da823f FC |
2773 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2774 | else SvOK_off(PL_bodytarget); | |
64eff8b7 DM |
2775 | FmLINES(PL_bodytarget) = 0; |
2776 | if (SvPOK(PL_bodytarget)) { | |
2777 | char *s = SvPVX(PL_bodytarget); | |
2778 | while ( ((s = strchr(s, '\n'))) ) { | |
2779 | FmLINES(PL_bodytarget)++; | |
2780 | s++; | |
2781 | } | |
2782 | } | |
125b9982 | 2783 | /* mg_set() has temporarily made sv non-magical */ |
284167a5 | 2784 | if (TAINTING_get) { |
125b9982 NT |
2785 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) |
2786 | SvTAINTED_on(PL_bodytarget); | |
2787 | else | |
2788 | SvTAINTED_off(PL_bodytarget); | |
2789 | } | |
748a9306 | 2790 | break; |
49460fe6 | 2791 | case '\003': /* ^C */ |
f2338a2e | 2792 | PL_minus_c = cBOOL(SvIV(sv)); |
49460fe6 NIS |
2793 | break; |
2794 | ||
79072805 | 2795 | case '\004': /* ^D */ |
b4ab917c | 2796 | #ifdef DEBUGGING |
a9e2d2bf DM |
2797 | { |
2798 | const char *s = SvPV_nolen_const(sv); | |
2799 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2800 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2801 | dump_all_perl(!DEBUG_B_TEST); | |
2802 | } | |
b4ab917c | 2803 | #else |
38ab35f8 | 2804 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2805 | #endif |
79072805 | 2806 | break; |
28f23441 | 2807 | case '\005': /* ^E */ |
d0063567 | 2808 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2809 | #ifdef VMS |
38ab35f8 | 2810 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2811 | #elif defined(WIN32) |
d0063567 | 2812 | SetLastError( SvIV(sv) ); |
2abc681d | 2813 | #elif defined(OS2) |
38ab35f8 | 2814 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2815 | #else |
d0063567 | 2816 | /* will anyone ever use this? */ |
38ab35f8 | 2817 | SETERRNO(SvIV(sv), 4); |
22fae026 | 2818 | #endif |
d0063567 | 2819 | } |
fd503f5c DIM |
2820 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) |
2821 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); | |
d0063567 | 2822 | break; |
79072805 | 2823 | case '\006': /* ^F */ |
38ab35f8 | 2824 | PL_maxsysfd = SvIV(sv); |
79072805 | 2825 | break; |
a0d0e21e | 2826 | case '\010': /* ^H */ |
efa571ab KW |
2827 | { |
2828 | U32 save_hints = PL_hints; | |
5d382c25 | 2829 | PL_hints = SvUV(sv); |
efa571ab KW |
2830 | |
2831 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2832 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2833 | notify_parser_that_changed_to_utf8(); | |
2834 | } | |
2835 | } | |
a0d0e21e | 2836 | break; |
9d116dd7 | 2837 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
43c5f42d | 2838 | Safefree(PL_inplace); |
bd61b366 | 2839 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; |
da78da6e | 2840 | break; |
d9bad346 FC |
2841 | case '\016': /* ^N */ |
2842 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) | |
2843 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2844 | goto croakparen; | |
28f23441 | 2845 | case '\017': /* ^O */ |
ac27b0f5 | 2846 | if (*(mg->mg_ptr+1) == '\0') { |
43c5f42d | 2847 | Safefree(PL_osname); |
bd61b366 | 2848 | PL_osname = NULL; |
3511154c DM |
2849 | if (SvOK(sv)) { |
2850 | TAINT_PROPER("assigning to $^O"); | |
2e0de35c | 2851 | PL_osname = savesvpv(sv); |
3511154c | 2852 | } |
ac27b0f5 NIS |
2853 | } |
2854 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
8b850bd5 NC |
2855 | STRLEN len; |
2856 | const char *const start = SvPV(sv, len); | |
b54fc2b6 | 2857 | const char *out = (const char*)memchr(start, '\0', len); |
8b850bd5 | 2858 | SV *tmp; |
8b850bd5 NC |
2859 | |
2860 | ||
2861 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
f747ebd6 | 2862 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; |
8b850bd5 NC |
2863 | |
2864 | /* Opening for input is more common than opening for output, so | |
2865 | ensure that hints for input are sooner on linked list. */ | |
59cd0e26 | 2866 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, |
f747ebd6 Z |
2867 | SvUTF8(sv)) |
2868 | : newSVpvs_flags("", SvUTF8(sv)); | |
2869 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2870 | mg_set(tmp); | |
8b850bd5 | 2871 | |
f747ebd6 Z |
2872 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, |
2873 | SvUTF8(sv)); | |
2874 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2875 | mg_set(tmp); | |
ac27b0f5 | 2876 | } |
28f23441 | 2877 | break; |
79072805 | 2878 | case '\020': /* ^P */ |
2fdbfb4d AB |
2879 | PL_perldb = SvIV(sv); |
2880 | if (PL_perldb && !PL_DBsingle) | |
2881 | init_debugger(); | |
9b9e0be4 | 2882 | break; |
79072805 | 2883 | case '\024': /* ^T */ |
88e89b8a | 2884 | #ifdef BIG_TIME |
6b88bc9c | 2885 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 2886 | #else |
38ab35f8 | 2887 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 2888 | #endif |
79072805 | 2889 | break; |
e07ea26a NC |
2890 | case '\025': /* ^UTF8CACHE */ |
2891 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { | |
2892 | PL_utf8cache = (signed char) sv_2iv(sv); | |
2893 | } | |
2894 | break; | |
fde18df1 | 2895 | case '\027': /* ^W & $^WARNING_BITS */ |
4438c4b7 JH |
2896 | if (*(mg->mg_ptr+1) == '\0') { |
2897 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
38ab35f8 | 2898 | i = SvIV(sv); |
ac27b0f5 | 2899 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) |
0453d815 | 2900 | | (i ? G_WARN_ON : G_WARN_OFF) ; |
4438c4b7 | 2901 | } |
599cee73 | 2902 | } |
0a378802 | 2903 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { |
4438c4b7 | 2904 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { |
7e4f0450 FC |
2905 | if (!SvPOK(sv)) { |
2906 | PL_compiling.cop_warnings = pWARN_STD; | |
d775746e GS |
2907 | break; |
2908 | } | |
f4fc7782 | 2909 | { |
b5477537 | 2910 | STRLEN len, i; |
d3a7d8c7 | 2911 | int accumulate = 0 ; |
f4fc7782 | 2912 | int any_fatals = 0 ; |
b83604b4 | 2913 | const char * const ptr = SvPV_const(sv, len) ; |
f4fc7782 JH |
2914 | for (i = 0 ; i < len ; ++i) { |
2915 | accumulate |= ptr[i] ; | |
2916 | any_fatals |= (ptr[i] & 0xAA) ; | |
2917 | } | |
4243c432 NC |
2918 | if (!accumulate) { |
2919 | if (!specialWARN(PL_compiling.cop_warnings)) | |
2920 | PerlMemShared_free(PL_compiling.cop_warnings); | |
2921 | PL_compiling.cop_warnings = pWARN_NONE; | |
2922 | } | |
3c3f8cd6 AB |
2923 | /* Yuck. I can't see how to abstract this: */ |
2924 | else if (isWARN_on( | |
2925 | ((STRLEN *)SvPV_nolen_const(sv)) - 1, | |
2926 | WARN_ALL) | |
2927 | && !any_fatals) | |
2928 | { | |
2929 | if (!specialWARN(PL_compiling.cop_warnings)) | |
2930 | PerlMemShared_free(PL_compiling.cop_warnings); | |
2931 | PL_compiling.cop_warnings = pWARN_ALL; | |
2932 | PL_dowarn |= G_WARN_ONCE ; | |
2933 | } | |
d3a7d8c7 | 2934 | else { |
72dc9ed5 NC |
2935 | STRLEN len; |
2936 | const char *const p = SvPV_const(sv, len); | |
2937 | ||
2938 | PL_compiling.cop_warnings | |
8ee4cf24 | 2939 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, |
72dc9ed5 NC |
2940 | p, len); |
2941 | ||
d3a7d8c7 GS |
2942 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
2943 | PL_dowarn |= G_WARN_ONCE ; | |
2944 | } | |
f4fc7782 | 2945 | |
d3a7d8c7 | 2946 | } |
4438c4b7 | 2947 | } |
971a9dd3 | 2948 | } |
8ca2a5d6 DD |
2949 | #ifdef WIN32 |
2950 | else if (strEQ(mg->mg_ptr+1, "IN32_SLOPPY_STAT")) { | |
2951 | w32_sloppystat = (bool)sv_true(sv); | |
2952 | } | |
2953 | #endif | |
79072805 LW |
2954 | break; |
2955 | case '.': | |
3280af22 NIS |
2956 | if (PL_localizing) { |
2957 | if (PL_localizing == 1) | |
7766f137 | 2958 | SAVESPTR(PL_last_in_gv); |
748a9306 | 2959 | } |
3280af22 | 2960 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) |
632db599 | 2961 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); |
79072805 LW |
2962 | break; |
2963 | case '^': | |
acbe1b9d | 2964 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 2965 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 2966 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
2967 | break; |
2968 | case '~': | |
acbe1b9d | 2969 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 2970 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 2971 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
2972 | break; |
2973 | case '=': | |
acbe1b9d | 2974 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
2975 | break; |
2976 | case '-': | |
acbe1b9d FC |
2977 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
2978 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
099be4f1 | 2979 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; |
79072805 LW |
2980 | break; |
2981 | case '%': | |
acbe1b9d | 2982 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
2983 | break; |
2984 | case '|': | |
4b65379b | 2985 | { |
099be4f1 | 2986 | IO * const io = GvIO(PL_defoutgv); |
720f287d AB |
2987 | if(!io) |
2988 | break; | |
38ab35f8 | 2989 | if ((SvIV(sv)) == 0) |
4b65379b CS |
2990 | IoFLAGS(io) &= ~IOf_FLUSH; |
2991 | else { | |
2992 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
2993 | PerlIO *ofp = IoOFP(io); | |
2994 | if (ofp) | |
2995 | (void)PerlIO_flush(ofp); | |
2996 | IoFLAGS(io) |= IOf_FLUSH; | |
2997 | } | |
2998 | } | |
79072805 LW |
2999 | } |
3000 | break; | |
79072805 | 3001 | case '/': |
1ab48e3a | 3002 | { |
1ab48e3a | 3003 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3004 | SV *referent = SvRV(sv); |
3005 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3006 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3007 | * the alternative is to copy pretty much the entire | |
3008 | * sv_reftype() into this routine, or to do a full string | |
3009 | * comparison on the return of sv_reftype() both of which | |
3010 | * make me feel worse! NOTE, do not modify this comment | |
3011 | * without reviewing the corresponding comment in | |
3012 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3013 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3014 | IV val = SvIV(referent); |
1ab48e3a | 3015 | if (val <= 0) { |
520b6fb6 DIM |
3016 | sv_setsv(sv, PL_rs); |
3017 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3018 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3019 | } |
3020 | } else { | |
ddce084a | 3021 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3022 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3023 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3024 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3025 | } |
3026 | } | |
b3a2acfa | 3027 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3028 | PL_rs = newSVsv(sv); |
b3a2acfa | 3029 | } |
79072805 LW |
3030 | break; |
3031 | case '\\': | |
ef8d46e8 | 3032 | SvREFCNT_dec(PL_ors_sv); |
6bc2995b | 3033 | if (SvOK(sv)) { |
7889fe52 | 3034 | PL_ors_sv = newSVsv(sv); |
009c130f | 3035 | } |
e3c19b7b | 3036 | else { |
a0714e2c | 3037 | PL_ors_sv = NULL; |
e3c19b7b | 3038 | } |
79072805 | 3039 | break; |
7d69d4a6 FC |
3040 | case '[': |
3041 | if (SvIV(sv) != 0) | |
3042 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3043 | break; | |
79072805 | 3044 | case '?': |
ff0cee69 | 3045 | #ifdef COMPLEX_STATUS |
6b88bc9c | 3046 | if (PL_localizing == 2) { |
41cb7b2b | 3047 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
3048 | PL_statusvalue = LvTARGOFF(sv); |
3049 | PL_statusvalue_vms = LvTARGLEN(sv); | |
ff0cee69 | 3050 | } |
3051 | else | |
3052 | #endif | |
3053 | #ifdef VMSISH_STATUS | |
3054 | if (VMSISH_STATUS) | |
fb38d079 | 3055 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); |
ff0cee69 | 3056 | else |
3057 | #endif | |
38ab35f8 | 3058 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
79072805 LW |
3059 | break; |
3060 | case '!': | |
93189314 JH |
3061 | { |
3062 | #ifdef VMS | |
3063 | # define PERL_VMS_BANG vaxc$errno | |
3064 | #else | |
3065 | # define PERL_VMS_BANG 0 | |
3066 | #endif | |
27329181 | 3067 | #if defined(WIN32) && ! defined(UNDER_CE) |
c9beaf97 SH |
3068 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3069 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
3070 | #else | |
91487cfc | 3071 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
93189314 | 3072 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); |
c9beaf97 | 3073 | #endif |
93189314 | 3074 | } |
79072805 LW |
3075 | break; |
3076 | case '<': | |
985213f2 | 3077 | { |
b469f1e0 | 3078 | /* XXX $< currently silently ignores failures */ |
dfff4baf | 3079 | const Uid_t new_uid = SvUID(sv); |
985213f2 | 3080 | PL_delaymagic_uid = new_uid; |
3280af22 NIS |
3081 | if (PL_delaymagic) { |
3082 | PL_delaymagic |= DM_RUID; | |
79072805 LW |
3083 | break; /* don't do magic till later */ |
3084 | } | |
3085 | #ifdef HAS_SETRUID | |
b469f1e0 | 3086 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3087 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3088 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3089 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3090 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3091 | #else |
985213f2 | 3092 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3093 | # ifdef PERL_DARWIN |
75870ed3 | 3094 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
985213f2 | 3095 | if (new_uid != 0 && PerlProc_getuid() == 0) |
b469f1e0 | 3096 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3097 | # endif |
b469f1e0 | 3098 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
75870ed3 | 3099 | } else { |
cea2e8a9 | 3100 | Perl_croak(aTHX_ "setruid() not implemented"); |
a0d0e21e | 3101 | } |
79072805 | 3102 | #endif |
79072805 | 3103 | break; |
985213f2 | 3104 | } |
79072805 | 3105 | case '>': |
985213f2 | 3106 | { |
b469f1e0 | 3107 | /* XXX $> currently silently ignores failures */ |
dfff4baf | 3108 | const Uid_t new_euid = SvUID(sv); |
985213f2 | 3109 | PL_delaymagic_euid = new_euid; |
3280af22 NIS |
3110 | if (PL_delaymagic) { |
3111 | PL_delaymagic |= DM_EUID; | |
79072805 LW |
3112 | break; /* don't do magic till later */ |
3113 | } | |
3114 | #ifdef HAS_SETEUID | |
b469f1e0 | 3115 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3116 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3117 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3118 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3119 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3120 | #else |
985213f2 | 3121 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
b469f1e0 | 3122 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); |
a0d0e21e | 3123 | else { |
cea2e8a9 | 3124 | Perl_croak(aTHX_ "seteuid() not implemented"); |
a0d0e21e | 3125 | } |
79072805 | 3126 | #endif |
79072805 | 3127 | break; |
985213f2 | 3128 | } |
79072805 | 3129 | case '(': |
985213f2 | 3130 | { |
b469f1e0 | 3131 | /* XXX $( currently silently ignores failures */ |
dfff4baf | 3132 | const Gid_t new_gid = SvGID(sv); |
985213f2 | 3133 | PL_delaymagic_gid = new_gid; |
3280af22 NIS |
3134 | if (PL_delaymagic) { |
3135 | PL_delaymagic |= DM_RGID; | |
79072805 LW |
3136 | break; /* don't do magic till later */ |
3137 | } | |
3138 | #ifdef HAS_SETRGID | |
b469f1e0 | 3139 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3140 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3141 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3142 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3143 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3144 | #else |
985213f2 | 3145 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
b469f1e0 | 3146 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); |
748a9306 | 3147 | else { |
cea2e8a9 | 3148 | Perl_croak(aTHX_ "setrgid() not implemented"); |
748a9306 | 3149 | } |
79072805 | 3150 | #endif |
79072805 | 3151 | break; |
985213f2 | 3152 | } |
79072805 | 3153 | case ')': |
985213f2 | 3154 | { |
0635704a HS |
3155 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3156 | * but you can override it if you need to. | |
3157 | */ | |
3158 | #ifndef INVALID_GID | |
3159 | #define INVALID_GID ((Gid_t)-1) | |
3160 | #endif | |
b469f1e0 | 3161 | /* XXX $) currently silently ignores failures */ |
dfff4baf | 3162 | Gid_t new_egid; |
5cd24f17 | 3163 | #ifdef HAS_SETGROUPS |
3164 | { | |
b83604b4 | 3165 | const char *p = SvPV_const(sv, len); |
757f63d8 | 3166 | Groups_t *gary = NULL; |
fdadaf77 | 3167 | const char* endptr; |
22ff3130 | 3168 | UV uv; |
fb4089e0 | 3169 | #ifdef _SC_NGROUPS_MAX |
3170 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3171 | ||
3172 | if (maxgrp < 0) | |
3173 | maxgrp = NGROUPS; | |
3174 | #else | |
3175 | int maxgrp = NGROUPS; | |
3176 | #endif | |
757f63d8 SP |
3177 | |
3178 | while (isSPACE(*p)) | |
3179 | ++p; | |
22ff3130 HS |
3180 | if (grok_atoUV(p, &uv, &endptr)) |
3181 | new_egid = (Gid_t)uv; | |
3182 | else { | |
0635704a | 3183 | new_egid = INVALID_GID; |
22ff3130 HS |
3184 | endptr = NULL; |
3185 | } | |
fb4089e0 | 3186 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3187 | if (endptr == NULL) |
3188 | break; | |
3189 | p = endptr; | |
757f63d8 SP |
3190 | while (isSPACE(*p)) |
3191 | ++p; | |
3192 | if (!*p) | |
3193 | break; | |
fdadaf77 | 3194 | if (!gary) |
757f63d8 SP |
3195 | Newx(gary, i + 1, Groups_t); |
3196 | else | |
3197 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3198 | if (grok_atoUV(p, &uv, &endptr)) |
3199 | gary[i] = (Groups_t)uv; | |
3200 | else { | |
0635704a | 3201 | gary[i] = INVALID_GID; |
22ff3130 HS |
3202 | endptr = NULL; |
3203 | } | |
757f63d8 SP |
3204 | } |
3205 | if (i) | |
b469f1e0 | 3206 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
f5a63d97 | 3207 | Safefree(gary); |
5cd24f17 | 3208 | } |
3209 | #else /* HAS_SETGROUPS */ | |
dfff4baf | 3210 | new_egid = SvGID(sv); |
5cd24f17 | 3211 | #endif /* HAS_SETGROUPS */ |
985213f2 | 3212 | PL_delaymagic_egid = new_egid; |
3280af22 NIS |
3213 | if (PL_delaymagic) { |
3214 | PL_delaymagic |= DM_EGID; | |
79072805 LW |
3215 | break; /* don't do magic till later */ |
3216 | } | |
3217 | #ifdef HAS_SETEGID | |
b469f1e0 | 3218 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3219 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3220 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3221 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3222 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3223 | #else |
985213f2 | 3224 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
b469f1e0 | 3225 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); |
748a9306 | 3226 | else { |
cea2e8a9 | 3227 | Perl_croak(aTHX_ "setegid() not implemented"); |
748a9306 | 3228 | } |
79072805 | 3229 | #endif |
79072805 | 3230 | break; |
985213f2 | 3231 | } |
79072805 | 3232 | case ':': |
2d8e6c8d | 3233 | PL_chopset = SvPV_force(sv,len); |
79072805 | 3234 | break; |
9cdac2a2 FC |
3235 | case '$': /* $$ */ |
3236 | /* Store the pid in mg->mg_obj so we can tell when a fork has | |
3237 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3238 | if (isGV(mg->mg_obj)) { | |
3239 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3240 | SvREFCNT_dec(mg->mg_obj); | |
3241 | mg->mg_flags |= MGf_REFCOUNTED; | |
3242 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3243 | } | |
3244 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3245 | break; | |
79072805 | 3246 | case '0': |
e2975953 | 3247 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3248 | S_set_dollarzero(aTHX_ sv); |
e2975953 | 3249 | UNLOCK_DOLLARZERO_MUTEX; |
79072805 LW |
3250 | break; |
3251 | } | |
3252 | return 0; | |
3253 | } | |
3254 | ||
3255 | I32 | |
84c7b88c BF |
3256 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3257 | { | |
3258 | const char *sigpv; | |
3259 | STRLEN siglen; | |
3260 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3261 | sigpv = SvPV_const(sigsv, siglen); |
3262 | return whichsig_pvn(sigpv, siglen); | |
3263 | } | |
3264 | ||
3265 | I32 | |
3266 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3267 | { | |
3268 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3269 | return whichsig_pvn(sig, strlen(sig)); |
3270 | } | |
3271 | ||
3272 | I32 | |
3273 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3274 | { |
eb578fdb | 3275 | char* const* sigv; |
7918f24d | 3276 | |
84c7b88c | 3277 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3278 | PERL_UNUSED_CONTEXT; |
79072805 | 3279 | |
aadb217d | 3280 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
84c7b88c | 3281 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
aadb217d | 3282 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; |
79072805 | 3283 | #ifdef SIGCLD |
84c7b88c | 3284 | if (memEQs(sig, len, "CHLD")) |
79072805 LW |
3285 | return SIGCLD; |
3286 | #endif | |
3287 | #ifdef SIGCHLD | |
84c7b88c | 3288 | if (memEQs(sig, len, "CLD")) |
79072805 LW |
3289 | return SIGCHLD; |
3290 | #endif | |
7f1236c0 | 3291 | return -1; |
79072805 LW |
3292 | } |
3293 | ||
ecfc5424 | 3294 | Signal_t |
1e82f5a6 | 3295 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
b3dbdd48 | 3296 | Perl_sighandler(int sig, siginfo_t *sip, void *uap) |
1e82f5a6 SH |
3297 | #else |
3298 | Perl_sighandler(int sig) | |
3299 | #endif | |
79072805 | 3300 | { |
1018e26f NIS |
3301 | #ifdef PERL_GET_SIG_CONTEXT |
3302 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3303 | #else |
cea2e8a9 | 3304 | dTHX; |
71d280e3 | 3305 | #endif |
79072805 | 3306 | dSP; |
a0714e2c SS |
3307 | GV *gv = NULL; |
3308 | SV *sv = NULL; | |
8772537c | 3309 | SV * const tSv = PL_Sv; |
601f1833 | 3310 | CV *cv = NULL; |
533c011a | 3311 | OP *myop = PL_op; |
84902520 | 3312 | U32 flags = 0; |
8772537c | 3313 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3314 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3315 | SV *errsv_save = NULL; |
71d280e3 | 3316 | |
84902520 | 3317 | |
727405f8 | 3318 | if (!PL_psig_ptr[sig]) { |
99ef548b | 3319 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
727405f8 NIS |
3320 | PL_sig_name[sig]); |
3321 | exit(sig); | |
3322 | } | |
ff0cee69 | 3323 | |
a0d63a7b DM |
3324 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3325 | /* Max number of items pushed there is 3*n or 4. We cannot fix | |
3326 | infinity, so we fix 4 (in fact 5): */ | |
3327 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3328 | flags |= 1; | |
3329 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3330 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3331 | } | |
84902520 | 3332 | } |
84902520 | 3333 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3334 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
8772537c AL |
3335 | || SvTYPE(cv) != SVt_PVCV) { |
3336 | HV *st; | |
f2c0649b | 3337 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); |
8772537c | 3338 | } |
84902520 | 3339 | |
a0d0e21e | 3340 | if (!cv || !CvROOT(cv)) { |
07c325bb | 3341 | const HEK * const hek = gv |
1d6bb9ae FC |
3342 | ? GvENAME_HEK(gv) |
3343 | : cv && CvNAMED(cv) | |
3344 | ? CvNAME_HEK(cv) | |
07c325bb FC |
3345 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; |
3346 | if (hek) | |
3347 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
147e3846 | 3348 | "SIG%s handler \"%" HEKf "\" not defined.\n", |
ac892e4a | 3349 | PL_sig_name[sig], HEKfARG(hek)); |
07c325bb FC |
3350 | /* diag_listed_as: SIG%s handler "%s" not defined */ |
3351 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3352 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3353 | PL_sig_name[sig]); | |
00d579c5 | 3354 | goto cleanup; |
79072805 LW |
3355 | } |
3356 | ||
0c4d3b5e DM |
3357 | sv = PL_psig_name[sig] |
3358 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) | |
3359 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3360 | flags |= 8; |
0c4d3b5e DM |
3361 | SAVEFREESV(sv); |
3362 | ||
a0d63a7b DM |
3363 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3364 | /* make sure our assumption about the size of the SAVEs are correct: | |
3365 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3366 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
3367 | } | |
e336de0d | 3368 | |
e788e7d3 | 3369 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3370 | PUSHMARK(SP); |
79072805 | 3371 | PUSHs(sv); |
8aad04aa JH |
3372 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3373 | { | |
3374 | struct sigaction oact; | |
3375 | ||
3376 | if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { | |
8aad04aa JH |
3377 | if (sip) { |
3378 | HV *sih = newHV(); | |
ad64d0ec | 3379 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); |
8aad04aa JH |
3380 | /* The siginfo fields signo, code, errno, pid, uid, |
3381 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
85771703 NC |
3382 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); |
3383 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
cdfe2e65 DIM |
3384 | #ifdef HAS_SIGINFO_SI_ERRNO |
3385 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3386 | #endif | |
3387 | #ifdef HAS_SIGINFO_SI_STATUS | |
3388 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3389 | #endif | |
3390 | #ifdef HAS_SIGINFO_SI_UID | |
3391 | { | |
3392 | SV *uid = newSV(0); | |
3393 | sv_setuid(uid, sip->si_uid); | |
3394 | (void)hv_stores(sih, "uid", uid); | |
3395 | } | |
3396 | #endif | |
3397 | #ifdef HAS_SIGINFO_SI_PID | |
3398 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3399 | #endif | |
3400 | #ifdef HAS_SIGINFO_SI_ADDR | |
3401 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3402 | #endif | |
3403 | #ifdef HAS_SIGINFO_SI_BAND | |
3404 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
79dec0f4 | 3405 | #endif |
8aad04aa | 3406 | EXTEND(SP, 2); |
ad64d0ec | 3407 | PUSHs(rv); |
22f1178f | 3408 | mPUSHp((char *)sip, sizeof(*sip)); |
8aad04aa | 3409 | } |
b4552a27 | 3410 | |
8aad04aa JH |
3411 | } |
3412 | } | |
3413 | #endif | |
79072805 | 3414 | PUTBACK; |
a0d0e21e | 3415 | |
100c03aa JL |
3416 | errsv_save = newSVsv(ERRSV); |
3417 | ||
ad64d0ec | 3418 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3419 | |
d3acc0f7 | 3420 | POPSTACK; |
eed484f9 DD |
3421 | { |
3422 | SV * const errsv = ERRSV; | |
3423 | if (SvTRUE_NN(errsv)) { | |
3424 | SvREFCNT_dec(errsv_save); | |
c22d665b | 3425 | #ifndef PERL_MICRO |
1b266415 NIS |
3426 | /* Handler "died", for example to get out of a restart-able read(). |
3427 | * Before we re-do that on its behalf re-enable the signal which was | |
3428 | * blocked by the system when we entered. | |
3429 | */ | |
c22d665b | 3430 | #ifdef HAS_SIGPROCMASK |
d488af49 | 3431 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
eed484f9 | 3432 | if (sip || uap) |
c22d665b | 3433 | #endif |
eed484f9 DD |
3434 | { |
3435 | sigset_t set; | |
3436 | sigemptyset(&set); | |
3437 | sigaddset(&set,sig); | |
3438 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3439 | } | |
c22d665b | 3440 | #else |
eed484f9 DD |
3441 | /* Not clear if this will work */ |
3442 | (void)rsignal(sig, SIG_IGN); | |
3443 | (void)rsignal(sig, PL_csighandlerp); | |
c22d665b LT |
3444 | #endif |
3445 | #endif /* !PERL_MICRO */ | |
eed484f9 DD |
3446 | die_sv(errsv); |
3447 | } | |
3448 | else { | |
3449 | sv_setsv(errsv, errsv_save); | |
3450 | SvREFCNT_dec(errsv_save); | |
3451 | } | |
100c03aa JL |
3452 | } |
3453 | ||
7b52d656 | 3454 | cleanup: |
0c4d3b5e DM |
3455 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3456 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3457 | if (flags & 8) |
2357bae7 | 3458 | SvREFCNT_dec_NN(sv); |
533c011a | 3459 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3460 | |
3280af22 NIS |
3461 | PL_Sv = tSv; /* Restore global temporaries. */ |
3462 | PL_Xpv = tXpv; | |
53bb94e2 | 3463 | return; |
79072805 | 3464 | } |
4e35701f NIS |
3465 | |
3466 | ||
51371543 | 3467 | static void |
8772537c | 3468 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3469 | { |
8772537c AL |
3470 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3471 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3472 | bool bumped; |
51371543 GS |
3473 | |
3474 | if (!sv) | |
3475 | return; | |
3476 | ||
4bac9ae4 CS |
3477 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
3478 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ | |
a623f893 FC |
3479 | if (mgs->mgs_flags) |
3480 | SvFLAGS(sv) |= mgs->mgs_flags; | |
51371543 GS |
3481 | else |
3482 | mg_magical(sv); | |
51371543 GS |
3483 | } |
3484 | ||
150b625d | 3485 | bumped = mgs->mgs_bumped; |
51371543 GS |
3486 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3487 | ||
3488 | /* If we're still on top of the stack, pop us off. (That condition | |
3489 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3490 | * if it's being called via leave_scope.) | |
3491 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3492 | * may leave alloc gunk on the savestack, and some code | |
3493 | * (e.g. sighandler) doesn't expect that... | |
3494 | */ | |
3495 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3496 | { | |
1be36ce0 NC |
3497 | UV popval = SSPOPUV; |
3498 | assert(popval == SAVEt_DESTRUCTOR_X); | |
51371543 | 3499 | PL_savestack_ix -= 2; |
1be36ce0 NC |
3500 | popval = SSPOPUV; |
3501 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); | |
3502 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3503 | } |
150b625d DM |
3504 | if (bumped) { |
3505 | if (SvREFCNT(sv) == 1) { | |
3506 | /* We hold the last reference to this SV, which implies that the | |
3507 | SV was deleted as a side effect of the routines we called. | |
3508 | So artificially keep it alive a bit longer. | |
3509 | We avoid turning on the TEMP flag, which can cause the SV's | |
3510 | buffer to get stolen (and maybe other stuff). */ | |
150b625d | 3511 | sv_2mortal(sv); |
4bac9ae4 | 3512 | SvTEMP_off(sv); |
8985fe98 | 3513 | } |
150b625d | 3514 | else |
2357bae7 | 3515 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ |
8985fe98 | 3516 | } |
51371543 GS |
3517 | } |
3518 | ||
0c4d3b5e DM |
3519 | /* clean up the mess created by Perl_sighandler(). |
3520 | * Note that this is only called during an exit in a signal handler; | |
3521 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3522 | * skipped over. */ |
0c4d3b5e | 3523 | |
51371543 | 3524 | static void |
8772537c | 3525 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3526 | { |
0c4d3b5e | 3527 | PERL_UNUSED_ARG(p); |
7918f24d | 3528 | |
0c4d3b5e | 3529 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3530 | } |
1018e26f | 3531 | |
66610fdd | 3532 | /* |
b3ca2e83 NC |
3533 | =for apidoc magic_sethint |
3534 | ||
796b6530 | 3535 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3536 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3537 | anything that would need a deep copy. Maybe we should warn if we find a | |
3538 | reference. | |
b3ca2e83 NC |
3539 | |
3540 | =cut | |
3541 | */ | |
3542 | int | |
3543 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3544 | { | |
ad64d0ec | 3545 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
59cd0e26 | 3546 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3547 | |
7918f24d NC |
3548 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3549 | ||
e6e3e454 NC |
3550 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3551 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3552 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3553 | or take other more complex action. */ | |
3554 | ||
5b9c0671 NC |
3555 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3556 | Doing this here saves a lot of doing it manually in perl code (and | |
3557 | forgetting to do it, and consequent subtle errors. */ | |
3558 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 Z |
3559 | CopHINTHASH_set(&PL_compiling, |
3560 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); | |
b3ca2e83 NC |
3561 | return 0; |
3562 | } | |
3563 | ||
3564 | /* | |
f175cff5 | 3565 | =for apidoc magic_clearhint |
b3ca2e83 | 3566 | |
796b6530 | 3567 | Triggered by a delete from C<%^H>, records the key to |
c28fe1ec | 3568 | C<PL_compiling.cop_hints_hash>. |
b3ca2e83 NC |
3569 | |
3570 | =cut | |
3571 | */ | |
3572 | int | |
3573 | Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg) | |
3574 | { | |
7918f24d | 3575 | PERL_ARGS_ASSERT_MAGIC_CLEARHINT; |
f5a63d97 AL |
3576 | PERL_UNUSED_ARG(sv); |
3577 | ||
5b9c0671 | 3578 | PL_hints |= HINT_LOCALIZE_HH; |
20439bc7 | 3579 | CopHINTHASH_set(&PL_compiling, |
e3352591 FC |
3580 | mg->mg_len == HEf_SVKEY |
3581 | ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling), | |
3582 | MUTABLE_SV(mg->mg_ptr), 0, 0) | |
3583 | : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling), | |
3584 | mg->mg_ptr, mg->mg_len, 0, 0)); | |
b3ca2e83 NC |
3585 | return 0; |
3586 | } | |
3587 | ||
3588 | /* | |
f747ebd6 Z |
3589 | =for apidoc magic_clearhints |
3590 | ||
796b6530 | 3591 | Triggered by clearing C<%^H>, resets C<PL_compiling.cop_hints_hash>. |
f747ebd6 Z |
3592 | |
3593 | =cut | |
3594 | */ | |
3595 | int | |
3596 | Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg) | |
3597 | { | |
3598 | PERL_ARGS_ASSERT_MAGIC_CLEARHINTS; | |
3599 | PERL_UNUSED_ARG(sv); | |
3600 | PERL_UNUSED_ARG(mg); | |
20439bc7 Z |
3601 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
3602 | CopHINTHASH_set(&PL_compiling, cophh_new_empty()); | |
f747ebd6 Z |
3603 | return 0; |
3604 | } | |
3605 | ||
09fb282d FC |
3606 | int |
3607 | Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv, | |
3608 | const char *name, I32 namlen) | |
3609 | { | |
3610 | MAGIC *nmg; | |
3611 | ||
3612 | PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER; | |
4f8dbb2d | 3613 | PERL_UNUSED_ARG(sv); |
09fb282d FC |
3614 | PERL_UNUSED_ARG(name); |
3615 | PERL_UNUSED_ARG(namlen); | |
3616 | ||
3617 | sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0); | |
3618 | nmg = mg_find(nsv, mg->mg_type); | |
316ebaf2 | 3619 | assert(nmg); |
09fb282d FC |
3620 | if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj); |
3621 | nmg->mg_ptr = mg->mg_ptr; | |
3622 | nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj); | |
3623 | nmg->mg_flags |= MGf_REFCOUNTED; | |
3624 | return 1; | |
3625 | } | |
3626 | ||
a6d69523 TC |
3627 | int |
3628 | Perl_magic_setdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3629 | PERL_ARGS_ASSERT_MAGIC_SETDEBUGVAR; | |
3630 | ||
23270f96 DM |
3631 | #if DBVARMG_SINGLE != 0 |
3632 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3633 | #endif | |
3634 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3635 | |
3636 | PL_DBcontrol[mg->mg_private] = SvIV_nomg(sv); | |
3637 | ||
3638 | return 1; | |
3639 | } | |
3640 | ||
3641 | int | |
3642 | Perl_magic_getdebugvar(pTHX_ SV *sv, MAGIC *mg) { | |
3643 | PERL_ARGS_ASSERT_MAGIC_GETDEBUGVAR; | |
3644 | ||
23270f96 DM |
3645 | #if DBVARMG_SINGLE != 0 |
3646 | assert(mg->mg_private >= DBVARMG_SINGLE); | |
3647 | #endif | |
3648 | assert(mg->mg_private < DBVARMG_COUNT); | |
a6d69523 TC |
3649 | sv_setiv(sv, PL_DBcontrol[mg->mg_private]); |
3650 | ||
3651 | return 0; | |
3652 | } | |
3653 | ||
f747ebd6 | 3654 | /* |
14d04a33 | 3655 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3656 | */ |