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 | 43 | #include "perl.h" |
b34c1a7e | 44 | #include "feature.h" |
79072805 | 45 | |
5cd24f17 | 46 | #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS) |
b7953727 JH |
47 | # ifdef I_GRP |
48 | # include <grp.h> | |
49 | # endif | |
188ea221 CS |
50 | #endif |
51 | ||
757f63d8 SP |
52 | #if defined(HAS_SETGROUPS) |
53 | # ifndef NGROUPS | |
54 | # define NGROUPS 32 | |
55 | # endif | |
56 | #endif | |
57 | ||
17aa7f3d JH |
58 | #ifdef __hpux |
59 | # include <sys/pstat.h> | |
60 | #endif | |
61 | ||
7636ea95 AB |
62 | #ifdef HAS_PRCTL_SET_NAME |
63 | # include <sys/prctl.h> | |
64 | #endif | |
65 | ||
9cffb111 OS |
66 | #ifdef __Lynx__ |
67 | /* Missing protos on LynxOS */ | |
68 | void setruid(uid_t id); | |
69 | void seteuid(uid_t id); | |
70 | void setrgid(uid_t id); | |
71 | void setegid(uid_t id); | |
72 | #endif | |
73 | ||
c07a80fd | 74 | /* |
4bac9ae4 | 75 | * Pre-magic setup and post-magic takedown. |
c07a80fd PP |
76 | * Use the "DESTRUCTOR" scope cleanup to reinstate magic. |
77 | */ | |
78 | ||
79 | struct magic_state { | |
80 | SV* mgs_sv; | |
455ece5e | 81 | I32 mgs_ss_ix; |
a623f893 | 82 | U32 mgs_flags; |
150b625d | 83 | bool mgs_bumped; |
c07a80fd | 84 | }; |
455ece5e | 85 | /* MGS is typedef'ed to struct magic_state in perl.h */ |
76e3520e GS |
86 | |
87 | STATIC void | |
ff44333e | 88 | S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags) |
c07a80fd | 89 | { |
455ece5e | 90 | MGS* mgs; |
150b625d | 91 | bool bumped = FALSE; |
7918f24d | 92 | |
ff44333e | 93 | PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS; |
7918f24d | 94 | |
4bac9ae4 CS |
95 | assert(SvMAGICAL(sv)); |
96 | ||
150b625d DM |
97 | /* we shouldn't really be called here with RC==0, but it can sometimes |
98 | * happen via mg_clear() (which also shouldn't be called when RC==0, | |
99 | * but it can happen). Handle this case gracefully(ish) by not RC++ | |
100 | * and thus avoiding the resultant double free */ | |
101 | if (SvREFCNT(sv) > 0) { | |
102 | /* guard against sv getting freed midway through the mg clearing, | |
103 | * by holding a private reference for the duration. */ | |
104 | SvREFCNT_inc_simple_void_NN(sv); | |
105 | bumped = TRUE; | |
106 | } | |
8985fe98 | 107 | |
8772537c | 108 | SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix)); |
455ece5e AD |
109 | |
110 | mgs = SSPTR(mgs_ix, MGS*); | |
c07a80fd | 111 | mgs->mgs_sv = sv; |
a623f893 | 112 | mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv); |
455ece5e | 113 | mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */ |
150b625d | 114 | mgs->mgs_bumped = bumped; |
c07a80fd | 115 | |
ff44333e | 116 | SvFLAGS(sv) &= ~flags; |
3805b5fb | 117 | SvREADONLY_off(sv); |
c07a80fd PP |
118 | } |
119 | ||
ff44333e FC |
120 | #define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG) |
121 | ||
954c1994 GS |
122 | /* |
123 | =for apidoc mg_magical | |
124 | ||
fbe13c60 | 125 | Turns on the magical status of an SV. See C<L</sv_magic>>. |
954c1994 GS |
126 | |
127 | =cut | |
128 | */ | |
129 | ||
8990e307 | 130 | void |
ddeaf645 | 131 | Perl_mg_magical(SV *sv) |
8990e307 | 132 | { |
e1ec3a88 | 133 | const MAGIC* mg; |
7918f24d | 134 | PERL_ARGS_ASSERT_MG_MAGICAL; |
f9c6fee5 CS |
135 | |
136 | SvMAGICAL_off(sv); | |
218787bd | 137 | if ((mg = SvMAGIC(sv))) { |
218787bd VP |
138 | do { |
139 | const MGVTBL* const vtbl = mg->mg_virtual; | |
140 | if (vtbl) { | |
141 | if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP)) | |
142 | SvGMAGICAL_on(sv); | |
143 | if (vtbl->svt_set) | |
144 | SvSMAGICAL_on(sv); | |
145 | if (vtbl->svt_clear) | |
146 | SvRMAGICAL_on(sv); | |
147 | } | |
148 | } while ((mg = mg->mg_moremagic)); | |
149 | if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG))) | |
150 | SvRMAGICAL_on(sv); | |
8990e307 LW |
151 | } |
152 | } | |
153 | ||
954c1994 GS |
154 | /* |
155 | =for apidoc mg_get | |
156 | ||
4b1e7f06 | 157 | Do magic before a value is retrieved from the SV. The type of SV must |
796b6530 | 158 | be >= C<SVt_PVMG>. See C<L</sv_magic>>. |
954c1994 GS |
159 | |
160 | =cut | |
161 | */ | |
162 | ||
79072805 | 163 | int |
864dbfa3 | 164 | Perl_mg_get(pTHX_ SV *sv) |
79072805 | 165 | { |
35a4481c | 166 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
a9844598 | 167 | bool saved = FALSE; |
f9c6fee5 | 168 | bool have_new = 0; |
b949b68f | 169 | bool taint_only = TRUE; /* the only get method seen is taint */ |
ff76feab | 170 | MAGIC *newmg, *head, *cur, *mg; |
6683b158 | 171 | |
7918f24d NC |
172 | PERL_ARGS_ASSERT_MG_GET; |
173 | ||
407287f9 FC |
174 | if (PL_localizing == 1 && sv == DEFSV) return 0; |
175 | ||
ff76feab AMS |
176 | /* We must call svt_get(sv, mg) for each valid entry in the linked |
177 | list of magic. svt_get() may delete the current entry, add new | |
178 | magic to the head of the list, or upgrade the SV. AMS 20010810 */ | |
179 | ||
180 | newmg = cur = head = mg = SvMAGIC(sv); | |
181 | while (mg) { | |
35a4481c | 182 | const MGVTBL * const vtbl = mg->mg_virtual; |
f9c6fee5 | 183 | MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */ |
ff76feab | 184 | |
2b260de0 | 185 | if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) { |
a9844598 CS |
186 | |
187 | /* taint's mg get is so dumb it doesn't need flag saving */ | |
b949b68f DM |
188 | if (mg->mg_type != PERL_MAGIC_taint) { |
189 | taint_only = FALSE; | |
190 | if (!saved) { | |
191 | save_magic(mgs_ix, sv); | |
192 | saved = TRUE; | |
193 | } | |
194 | } | |
a9844598 | 195 | |
16c91539 | 196 | vtbl->svt_get(aTHX_ sv, mg); |
b77f7d40 | 197 | |
58f82c5c DM |
198 | /* guard against magic having been deleted - eg FETCH calling |
199 | * untie */ | |
f9c6fee5 | 200 | if (!SvMAGIC(sv)) { |
a623f893 FC |
201 | /* recalculate flags */ |
202 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
58f82c5c | 203 | break; |
f9c6fee5 | 204 | } |
b77f7d40 | 205 | |
f9c6fee5 | 206 | /* recalculate flags if this entry was deleted. */ |
ff76feab | 207 | if (mg->mg_flags & MGf_GSKIP) |
a623f893 FC |
208 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= |
209 | ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
a0d0e21e | 210 | } |
7d1328bb | 211 | else if (vtbl == &PL_vtbl_utf8) { |
b949b68f DM |
212 | /* get-magic can reallocate the PV, unless there's only taint |
213 | * magic */ | |
214 | if (taint_only) { | |
215 | MAGIC *mg2; | |
216 | for (mg2 = nextmg; mg2; mg2 = mg2->mg_moremagic) { | |
217 | if ( mg2->mg_type != PERL_MAGIC_taint | |
218 | && !(mg2->mg_flags & MGf_GSKIP) | |
219 | && mg2->mg_virtual | |
220 | && mg2->mg_virtual->svt_get | |
221 | ) { | |
222 | taint_only = FALSE; | |
223 | break; | |
224 | } | |
225 | } | |
226 | } | |
227 | if (!taint_only) | |
228 | magic_setutf8(sv, mg); | |
7d1328bb | 229 | } |
ff76feab | 230 | |
f9c6fee5 | 231 | mg = nextmg; |
ff76feab | 232 | |
0723351e | 233 | if (have_new) { |
ff76feab AMS |
234 | /* Have we finished with the new entries we saw? Start again |
235 | where we left off (unless there are more new entries). */ | |
236 | if (mg == head) { | |
0723351e | 237 | have_new = 0; |
ff76feab AMS |
238 | mg = cur; |
239 | head = newmg; | |
240 | } | |
241 | } | |
242 | ||
243 | /* Were any new entries added? */ | |
0723351e NC |
244 | if (!have_new && (newmg = SvMAGIC(sv)) != head) { |
245 | have_new = 1; | |
ff76feab AMS |
246 | cur = mg; |
247 | mg = newmg; | |
a623f893 FC |
248 | /* recalculate flags */ |
249 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
760ac839 | 250 | } |
79072805 | 251 | } |
463ee0b2 | 252 | |
a9844598 CS |
253 | if (saved) |
254 | restore_magic(INT2PTR(void *, (IV)mgs_ix)); | |
255 | ||
79072805 LW |
256 | return 0; |
257 | } | |
258 | ||
954c1994 GS |
259 | /* |
260 | =for apidoc mg_set | |
261 | ||
fbe13c60 | 262 | Do magic after a value is assigned to the SV. See C<L</sv_magic>>. |
954c1994 GS |
263 | |
264 | =cut | |
265 | */ | |
266 | ||
79072805 | 267 | int |
864dbfa3 | 268 | Perl_mg_set(pTHX_ SV *sv) |
79072805 | 269 | { |
35a4481c | 270 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 271 | MAGIC* mg; |
463ee0b2 LW |
272 | MAGIC* nextmg; |
273 | ||
7918f24d NC |
274 | PERL_ARGS_ASSERT_MG_SET; |
275 | ||
b5ed8c44 FC |
276 | if (PL_localizing == 2 && sv == DEFSV) return 0; |
277 | ||
ff44333e | 278 | save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */ |
463ee0b2 LW |
279 | |
280 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { | |
e1ec3a88 | 281 | const MGVTBL* vtbl = mg->mg_virtual; |
463ee0b2 | 282 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
a0d0e21e LW |
283 | if (mg->mg_flags & MGf_GSKIP) { |
284 | mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */ | |
a623f893 | 285 | (SSPTR(mgs_ix, MGS*))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); |
a0d0e21e | 286 | } |
e0a73de4 | 287 | if (PL_localizing == 2 |
b5ed8c44 | 288 | && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
e7cbf6c6 | 289 | continue; |
2b260de0 | 290 | if (vtbl && vtbl->svt_set) |
16c91539 | 291 | vtbl->svt_set(aTHX_ sv, mg); |
79072805 | 292 | } |
463ee0b2 | 293 | |
8772537c | 294 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
295 | return 0; |
296 | } | |
297 | ||
954c1994 GS |
298 | /* |
299 | =for apidoc mg_length | |
300 | ||
d4e99c76 | 301 | Reports on the SV's length in bytes, calling length magic if available, |
796b6530 | 302 | but does not set the UTF8 flag on C<sv>. It will fall back to 'get' |
bd8446cf | 303 | magic if there is no 'length' magic, but with no indication as to |
796b6530 KW |
304 | whether it called 'get' magic. It assumes C<sv> is a C<PVMG> or |
305 | higher. Use C<sv_len()> instead. | |
954c1994 GS |
306 | |
307 | =cut | |
308 | */ | |
309 | ||
79072805 | 310 | U32 |
864dbfa3 | 311 | Perl_mg_length(pTHX_ SV *sv) |
79072805 LW |
312 | { |
313 | MAGIC* mg; | |
463ee0b2 | 314 | STRLEN len; |
463ee0b2 | 315 | |
7918f24d NC |
316 | PERL_ARGS_ASSERT_MG_LENGTH; |
317 | ||
79072805 | 318 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 319 | const MGVTBL * const vtbl = mg->mg_virtual; |
2b260de0 | 320 | if (vtbl && vtbl->svt_len) { |
35a4481c | 321 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
455ece5e | 322 | save_magic(mgs_ix, sv); |
a0d0e21e | 323 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 324 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 325 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
85e6fe83 LW |
326 | return len; |
327 | } | |
328 | } | |
329 | ||
bd8446cf | 330 | (void)SvPV_const(sv, len); |
463ee0b2 | 331 | return len; |
79072805 LW |
332 | } |
333 | ||
8fb26106 | 334 | I32 |
864dbfa3 | 335 | Perl_mg_size(pTHX_ SV *sv) |
93965878 NIS |
336 | { |
337 | MAGIC* mg; | |
ac27b0f5 | 338 | |
7918f24d NC |
339 | PERL_ARGS_ASSERT_MG_SIZE; |
340 | ||
93965878 | 341 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 342 | const MGVTBL* const vtbl = mg->mg_virtual; |
2b260de0 | 343 | if (vtbl && vtbl->svt_len) { |
35a4481c AL |
344 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
345 | I32 len; | |
455ece5e | 346 | save_magic(mgs_ix, sv); |
93965878 | 347 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 348 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 349 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
93965878 NIS |
350 | return len; |
351 | } | |
352 | } | |
353 | ||
354 | switch(SvTYPE(sv)) { | |
355 | case SVt_PVAV: | |
502c6561 | 356 | return AvFILLp((const AV *) sv); /* Fallback to non-tied array */ |
93965878 NIS |
357 | case SVt_PVHV: |
358 | /* FIXME */ | |
359 | default: | |
cea2e8a9 | 360 | Perl_croak(aTHX_ "Size magic not implemented"); |
81d52ecd | 361 | |
93965878 | 362 | } |
a25b5927 | 363 | NOT_REACHED; /* NOTREACHED */ |
93965878 NIS |
364 | } |
365 | ||
954c1994 GS |
366 | /* |
367 | =for apidoc mg_clear | |
368 | ||
fbe13c60 | 369 | Clear something magical that the SV represents. See C<L</sv_magic>>. |
954c1994 GS |
370 | |
371 | =cut | |
372 | */ | |
373 | ||
79072805 | 374 | int |
864dbfa3 | 375 | Perl_mg_clear(pTHX_ SV *sv) |
79072805 | 376 | { |
35a4481c | 377 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 378 | MAGIC* mg; |
8ac77ac9 | 379 | MAGIC *nextmg; |
463ee0b2 | 380 | |
7918f24d NC |
381 | PERL_ARGS_ASSERT_MG_CLEAR; |
382 | ||
455ece5e | 383 | save_magic(mgs_ix, sv); |
463ee0b2 | 384 | |
8ac77ac9 | 385 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { |
35a4481c | 386 | const MGVTBL* const vtbl = mg->mg_virtual; |
a0d0e21e | 387 | /* omit GSKIP -- never set here */ |
727405f8 | 388 | |
8ac77ac9 NC |
389 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
390 | ||
2b260de0 | 391 | if (vtbl && vtbl->svt_clear) |
16c91539 | 392 | vtbl->svt_clear(aTHX_ sv, mg); |
79072805 | 393 | } |
463ee0b2 | 394 | |
8772537c | 395 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
396 | return 0; |
397 | } | |
398 | ||
ed624ca8 | 399 | static MAGIC* |
ddeaf645 | 400 | S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags) |
39de7f53 | 401 | { |
39de7f53 FR |
402 | assert(flags <= 1); |
403 | ||
404 | if (sv) { | |
405 | MAGIC *mg; | |
406 | ||
407 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
408 | if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) { | |
409 | return mg; | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | return NULL; | |
415 | } | |
416 | ||
954c1994 GS |
417 | /* |
418 | =for apidoc mg_find | |
419 | ||
796b6530 | 420 | Finds the magic pointer for C<type> matching the SV. See C<L</sv_magic>>. |
954c1994 GS |
421 | |
422 | =cut | |
423 | */ | |
424 | ||
93a17b20 | 425 | MAGIC* |
ddeaf645 | 426 | Perl_mg_find(const SV *sv, int type) |
93a17b20 | 427 | { |
ddeaf645 | 428 | return S_mg_findext_flags(sv, type, NULL, 0); |
39de7f53 FR |
429 | } |
430 | ||
431 | /* | |
432 | =for apidoc mg_findext | |
433 | ||
434 | Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See | |
fbe13c60 | 435 | C<L</sv_magicext>>. |
39de7f53 FR |
436 | |
437 | =cut | |
438 | */ | |
439 | ||
440 | MAGIC* | |
ddeaf645 | 441 | Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl) |
39de7f53 | 442 | { |
ddeaf645 | 443 | return S_mg_findext_flags(sv, type, vtbl, 1); |
93a17b20 LW |
444 | } |
445 | ||
96c2a8ff FC |
446 | MAGIC * |
447 | Perl_mg_find_mglob(pTHX_ SV *sv) | |
448 | { | |
449 | PERL_ARGS_ASSERT_MG_FIND_MGLOB; | |
450 | if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') { | |
451 | /* This sv is only a delegate. //g magic must be attached to | |
452 | its target. */ | |
453 | vivify_defelem(sv); | |
454 | sv = LvTARG(sv); | |
455 | } | |
456 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) | |
ddeaf645 | 457 | return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0); |
96c2a8ff FC |
458 | return NULL; |
459 | } | |
460 | ||
954c1994 GS |
461 | /* |
462 | =for apidoc mg_copy | |
463 | ||
fbe13c60 | 464 | Copies the magic from one SV to another. See C<L</sv_magic>>. |
954c1994 GS |
465 | |
466 | =cut | |
467 | */ | |
468 | ||
79072805 | 469 | int |
864dbfa3 | 470 | Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen) |
79072805 | 471 | { |
463ee0b2 | 472 | int count = 0; |
79072805 | 473 | MAGIC* mg; |
7918f24d NC |
474 | |
475 | PERL_ARGS_ASSERT_MG_COPY; | |
476 | ||
463ee0b2 | 477 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 478 | const MGVTBL* const vtbl = mg->mg_virtual; |
68795e93 | 479 | if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){ |
16c91539 | 480 | count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen); |
68795e93 | 481 | } |
823a54a3 AL |
482 | else { |
483 | const char type = mg->mg_type; | |
1e73acc8 | 484 | if (isUPPER(type) && type != PERL_MAGIC_uvar) { |
823a54a3 AL |
485 | sv_magic(nsv, |
486 | (type == PERL_MAGIC_tied) | |
487 | ? SvTIED_obj(sv, mg) | |
27deb0cf | 488 | : mg->mg_obj, |
823a54a3 AL |
489 | toLOWER(type), key, klen); |
490 | count++; | |
491 | } | |
79072805 | 492 | } |
79072805 | 493 | } |
463ee0b2 | 494 | return count; |
79072805 LW |
495 | } |
496 | ||
954c1994 | 497 | /* |
0cbee0a4 DM |
498 | =for apidoc mg_localize |
499 | ||
9711599e | 500 | Copy some of the magic from an existing SV to new localized version of that |
dfcfced8 KW |
501 | SV. Container magic (I<e.g.>, C<%ENV>, C<$1>, C<tie>) |
502 | gets copied, value magic doesn't (I<e.g.>, | |
796b6530 | 503 | C<taint>, C<pos>). |
9711599e | 504 | |
796b6530 | 505 | If C<setmagic> is false then no set magic will be called on the new (empty) SV. |
61b16eb9 | 506 | This typically means that assignment will soon follow (e.g. S<C<'local $x = $y'>>), |
9711599e | 507 | and that will handle the magic. |
0cbee0a4 DM |
508 | |
509 | =cut | |
510 | */ | |
511 | ||
512 | void | |
af7df257 | 513 | Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic) |
0cbee0a4 DM |
514 | { |
515 | MAGIC *mg; | |
7918f24d NC |
516 | |
517 | PERL_ARGS_ASSERT_MG_LOCALIZE; | |
518 | ||
658a9f31 JD |
519 | if (nsv == DEFSV) |
520 | return; | |
521 | ||
0cbee0a4 | 522 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
2b1b43ea | 523 | const MGVTBL* const vtbl = mg->mg_virtual; |
e0a73de4 | 524 | if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
0cbee0a4 | 525 | continue; |
0cbee0a4 | 526 | |
a5063e7c | 527 | if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local) |
16c91539 | 528 | (void)vtbl->svt_local(aTHX_ nsv, mg); |
a5063e7c | 529 | else |
0cbee0a4 DM |
530 | sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl, |
531 | mg->mg_ptr, mg->mg_len); | |
a5063e7c | 532 | |
0cbee0a4 | 533 | /* container types should remain read-only across localization */ |
9ff3e6d8 | 534 | SvFLAGS(nsv) |= SvREADONLY(sv); |
0cbee0a4 DM |
535 | } |
536 | ||
537 | if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) { | |
538 | SvFLAGS(nsv) |= SvMAGICAL(sv); | |
af7df257 | 539 | if (setmagic) { |
9711599e CS |
540 | PL_localizing = 1; |
541 | SvSETMAGIC(nsv); | |
542 | PL_localizing = 0; | |
543 | } | |
0cbee0a4 DM |
544 | } |
545 | } | |
546 | ||
d9088386 Z |
547 | #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg) |
548 | static void | |
549 | S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg) | |
550 | { | |
551 | const MGVTBL* const vtbl = mg->mg_virtual; | |
552 | if (vtbl && vtbl->svt_free) | |
553 | vtbl->svt_free(aTHX_ sv, mg); | |
44955e7d DM |
554 | |
555 | if (mg->mg_type == PERL_MAGIC_collxfrm && mg->mg_len >= 0) | |
556 | /* collate magic uses string len not buffer len, so | |
557 | * free even with mg_len == 0 */ | |
558 | Safefree(mg->mg_ptr); | |
559 | else if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) { | |
d9088386 Z |
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 | } | |
44955e7d | 565 | |
d9088386 Z |
566 | if (mg->mg_flags & MGf_REFCOUNTED) |
567 | SvREFCNT_dec(mg->mg_obj); | |
568 | Safefree(mg); | |
569 | } | |
570 | ||
0cbee0a4 | 571 | /* |
954c1994 GS |
572 | =for apidoc mg_free |
573 | ||
fbe13c60 | 574 | Free any magic storage used by the SV. See C<L</sv_magic>>. |
954c1994 GS |
575 | |
576 | =cut | |
577 | */ | |
578 | ||
79072805 | 579 | int |
864dbfa3 | 580 | Perl_mg_free(pTHX_ SV *sv) |
79072805 LW |
581 | { |
582 | MAGIC* mg; | |
583 | MAGIC* moremagic; | |
7918f24d NC |
584 | |
585 | PERL_ARGS_ASSERT_MG_FREE; | |
586 | ||
79072805 | 587 | for (mg = SvMAGIC(sv); mg; mg = moremagic) { |
79072805 | 588 | moremagic = mg->mg_moremagic; |
d9088386 | 589 | mg_free_struct(sv, mg); |
c826f41b | 590 | SvMAGIC_set(sv, moremagic); |
79072805 | 591 | } |
b162af07 | 592 | SvMAGIC_set(sv, NULL); |
68f8932e | 593 | SvMAGICAL_off(sv); |
79072805 LW |
594 | return 0; |
595 | } | |
596 | ||
d9088386 | 597 | /* |
44170c9a | 598 | =for apidoc mg_free_type |
d9088386 | 599 | |
2d7f6611 | 600 | Remove any magic of type C<how> from the SV C<sv>. See L</sv_magic>. |
d9088386 Z |
601 | |
602 | =cut | |
603 | */ | |
604 | ||
605 | void | |
606 | Perl_mg_free_type(pTHX_ SV *sv, int how) | |
607 | { | |
608 | MAGIC *mg, *prevmg, *moremg; | |
609 | PERL_ARGS_ASSERT_MG_FREE_TYPE; | |
610 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
d9088386 Z |
611 | moremg = mg->mg_moremagic; |
612 | if (mg->mg_type == how) { | |
19742f39 | 613 | MAGIC *newhead; |
d9088386 Z |
614 | /* temporarily move to the head of the magic chain, in case |
615 | custom free code relies on this historical aspect of mg_free */ | |
616 | if (prevmg) { | |
617 | prevmg->mg_moremagic = moremg; | |
618 | mg->mg_moremagic = SvMAGIC(sv); | |
619 | SvMAGIC_set(sv, mg); | |
620 | } | |
621 | newhead = mg->mg_moremagic; | |
622 | mg_free_struct(sv, mg); | |
623 | SvMAGIC_set(sv, newhead); | |
624 | mg = prevmg; | |
625 | } | |
626 | } | |
627 | mg_magical(sv); | |
628 | } | |
629 | ||
e0d4aead TC |
630 | /* |
631 | =for apidoc mg_freeext | |
632 | ||
633 | Remove any magic of type C<how> using virtual table C<vtbl> from the | |
634 | SV C<sv>. See L</sv_magic>. | |
635 | ||
636 | C<mg_freeext(sv, how, NULL)> is equivalent to C<mg_free_type(sv, how)>. | |
637 | ||
638 | =cut | |
639 | */ | |
640 | ||
641 | void | |
642 | Perl_mg_freeext(pTHX_ SV *sv, int how, const MGVTBL *vtbl) | |
643 | { | |
644 | MAGIC *mg, *prevmg, *moremg; | |
645 | PERL_ARGS_ASSERT_MG_FREEEXT; | |
646 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
647 | MAGIC *newhead; | |
648 | moremg = mg->mg_moremagic; | |
649 | if (mg->mg_type == how && (vtbl == NULL || mg->mg_virtual == vtbl)) { | |
650 | /* temporarily move to the head of the magic chain, in case | |
651 | custom free code relies on this historical aspect of mg_free */ | |
652 | if (prevmg) { | |
653 | prevmg->mg_moremagic = moremg; | |
654 | mg->mg_moremagic = SvMAGIC(sv); | |
655 | SvMAGIC_set(sv, mg); | |
656 | } | |
657 | newhead = mg->mg_moremagic; | |
658 | mg_free_struct(sv, mg); | |
659 | SvMAGIC_set(sv, newhead); | |
660 | mg = prevmg; | |
661 | } | |
662 | } | |
663 | mg_magical(sv); | |
664 | } | |
665 | ||
79072805 | 666 | #include <signal.h> |
79072805 | 667 | |
942e002e | 668 | U32 |
864dbfa3 | 669 | Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 670 | { |
8772537c | 671 | PERL_UNUSED_ARG(sv); |
6cef1e77 | 672 | |
7918f24d NC |
673 | PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT; |
674 | ||
0bd48802 | 675 | if (PL_curpm) { |
27deb0cf | 676 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 677 | if (rx) { |
fa531f32 DM |
678 | const SSize_t n = (SSize_t)mg->mg_obj; |
679 | if (n == '+') { /* @+ */ | |
a678b0e4 | 680 | /* return the number possible */ |
07bc277f | 681 | return RX_NPARENS(rx); |
27deb0cf | 682 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
07bc277f | 683 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 YO |
684 | |
685 | /* return the last filled */ | |
f46c4081 | 686 | while ( paren >= 0 |
07bc277f NC |
687 | && (RX_OFFS(rx)[paren].start == -1 |
688 | || RX_OFFS(rx)[paren].end == -1) ) | |
f46c4081 | 689 | paren--; |
fa531f32 | 690 | if (n == '-') { |
27deb0cf YO |
691 | /* @- */ |
692 | return (U32)paren; | |
693 | } else { | |
694 | /* @^CAPTURE @{^CAPTURE} */ | |
695 | return paren >= 0 ? (U32)(paren-1) : (U32)-1; | |
696 | } | |
697 | } | |
0bd48802 | 698 | } |
8f580fb8 | 699 | } |
ac27b0f5 | 700 | |
942e002e | 701 | return (U32)-1; |
6cef1e77 IZ |
702 | } |
703 | ||
6502e081 DM |
704 | /* @-, @+ */ |
705 | ||
6cef1e77 | 706 | int |
864dbfa3 | 707 | Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 708 | { |
7918f24d NC |
709 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET; |
710 | ||
0bd48802 | 711 | if (PL_curpm) { |
27deb0cf | 712 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 713 | if (rx) { |
fa531f32 | 714 | const SSize_t n = (SSize_t)mg->mg_obj; |
27deb0cf YO |
715 | /* @{^CAPTURE} does not contain $&, so we need to increment by 1 */ |
716 | const I32 paren = mg->mg_len | |
fa531f32 | 717 | + (n == '\003' ? 1 : 0); |
a10eae29 FC |
718 | SSize_t s; |
719 | SSize_t t; | |
0bd48802 AL |
720 | if (paren < 0) |
721 | return 0; | |
07bc277f NC |
722 | if (paren <= (I32)RX_NPARENS(rx) && |
723 | (s = RX_OFFS(rx)[paren].start) != -1 && | |
724 | (t = RX_OFFS(rx)[paren].end) != -1) | |
0bd48802 | 725 | { |
a10eae29 | 726 | SSize_t i; |
27deb0cf | 727 | |
fa531f32 | 728 | if (n == '+') /* @+ */ |
0bd48802 | 729 | i = t; |
fa531f32 | 730 | else if (n == '-') /* @- */ |
0bd48802 | 731 | i = s; |
27deb0cf YO |
732 | else { /* @^CAPTURE @{^CAPTURE} */ |
733 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
734 | return 0; | |
735 | } | |
0bd48802 | 736 | |
a10eae29 | 737 | if (RX_MATCH_UTF8(rx)) { |
07bc277f | 738 | const char * const b = RX_SUBBEG(rx); |
0bd48802 | 739 | if (b) |
6502e081 DM |
740 | i = RX_SUBCOFFSET(rx) + |
741 | utf8_length((U8*)b, | |
742 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
0bd48802 | 743 | } |
727405f8 | 744 | |
a10eae29 | 745 | sv_setuv(sv, i); |
232af1f8 | 746 | return 0; |
1aa99e6b | 747 | } |
0bd48802 | 748 | } |
6cef1e77 | 749 | } |
3773545d | 750 | sv_set_undef(sv); |
6cef1e77 IZ |
751 | return 0; |
752 | } | |
753 | ||
6502e081 DM |
754 | /* @-, @+ */ |
755 | ||
e4b89193 | 756 | int |
a29d06ed MG |
757 | Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg) |
758 | { | |
7918f24d | 759 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET; |
dc3bf405 | 760 | PERL_UNUSED_CONTEXT; |
d4c19fe8 AL |
761 | PERL_UNUSED_ARG(sv); |
762 | PERL_UNUSED_ARG(mg); | |
cb077ed2 | 763 | Perl_croak_no_modify(); |
0dbb1585 | 764 | NORETURN_FUNCTION_END; |
a29d06ed MG |
765 | } |
766 | ||
ad3296c6 | 767 | #define SvRTRIM(sv) STMT_START { \ |
eae92ea0 GA |
768 | if (SvPOK(sv)) { \ |
769 | STRLEN len = SvCUR(sv); \ | |
770 | char * const p = SvPVX(sv); \ | |
8e6b4db6 PC |
771 | while (len > 0 && isSPACE(p[len-1])) \ |
772 | --len; \ | |
773 | SvCUR_set(sv, len); \ | |
774 | p[len] = '\0'; \ | |
775 | } \ | |
ad3296c6 SH |
776 | } STMT_END |
777 | ||
8b850bd5 NC |
778 | void |
779 | Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv) | |
780 | { | |
7918f24d NC |
781 | PERL_ARGS_ASSERT_EMULATE_COP_IO; |
782 | ||
8b850bd5 | 783 | if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT))) |
e03e82a0 | 784 | sv_set_undef(sv); |
8b850bd5 | 785 | else { |
b2aed775 | 786 | SvPVCLEAR(sv); |
8b850bd5 NC |
787 | SvUTF8_off(sv); |
788 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
20439bc7 | 789 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); |
8b850bd5 NC |
790 | assert(value); |
791 | sv_catsv(sv, value); | |
792 | } | |
793 | sv_catpvs(sv, "\0"); | |
794 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
20439bc7 | 795 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); |
8b850bd5 NC |
796 | assert(value); |
797 | sv_catsv(sv, value); | |
798 | } | |
799 | } | |
800 | } | |
801 | ||
d9fe7d23 KW |
802 | STATIC void |
803 | S_fixup_errno_string(pTHX_ SV* sv) | |
804 | { | |
805 | /* Do what is necessary to fixup the non-empty string in 'sv' for return to | |
806 | * Perl space. */ | |
807 | ||
808 | PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING; | |
809 | ||
810 | assert(SvOK(sv)); | |
b35e4f8b KW |
811 | |
812 | if(strEQ(SvPVX(sv), "")) { | |
813 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); | |
814 | } | |
815 | else { | |
d9fe7d23 | 816 | |
d3c0b317 KW |
817 | /* In some locales the error string may come back as UTF-8, in which |
818 | * case we should turn on that flag. This didn't use to happen, and to | |
5320b60d KW |
819 | * avoid as many possible backward compatibility issues as possible, we |
820 | * don't turn on the flag unless we have to. So the flag stays off for | |
9f10db87 | 821 | * an entirely invariant string. We assume that if the string looks |
fab19207 KW |
822 | * like UTF-8 in a single script, it really is UTF-8: "text in any |
823 | * other encoding that uses bytes with the high bit set is extremely | |
824 | * unlikely to pass a UTF-8 validity test" | |
9f10db87 KW |
825 | * (http://en.wikipedia.org/wiki/Charset_detection). There is a |
826 | * potential that we will get it wrong however, especially on short | |
a8f4b0c6 | 827 | * error message text, so do an additional check. */ |
027a0d26 KW |
828 | if ( ! IN_BYTES /* respect 'use bytes' */ |
829 | && is_utf8_non_invariant_string((U8*) SvPVX_const(sv), SvCUR(sv)) | |
a8f4b0c6 KW |
830 | |
831 | #ifdef USE_LOCALE_MESSAGES | |
832 | ||
61520eee | 833 | && _is_cur_LC_category_utf8(LC_MESSAGES) |
a8f4b0c6 | 834 | |
fab19207 KW |
835 | #else /* If can't check directly, at least can see if script is consistent, |
836 | under UTF-8, which gives us an extra measure of confidence. */ | |
837 | ||
838 | && isSCRIPT_RUN((const U8 *) SvPVX_const(sv), (U8 *) SvEND(sv), | |
8c53dada | 839 | TRUE) /* Means assume UTF-8 */ |
a8f4b0c6 KW |
840 | #endif |
841 | ||
842 | ) { | |
d3c0b317 KW |
843 | SvUTF8_on(sv); |
844 | } | |
b35e4f8b | 845 | } |
d9fe7d23 KW |
846 | } |
847 | ||
658db622 | 848 | /* |
44170c9a | 849 | =for apidoc sv_string_from_errnum |
658db622 Z |
850 | |
851 | Generates the message string describing an OS error and returns it as | |
852 | an SV. C<errnum> must be a value that C<errno> could take, identifying | |
853 | the type of error. | |
854 | ||
855 | If C<tgtsv> is non-null then the string will be written into that SV | |
856 | (overwriting existing content) and it will be returned. If C<tgtsv> | |
857 | is a null pointer then the string will be written into a new mortal SV | |
858 | which will be returned. | |
859 | ||
860 | The message will be taken from whatever locale would be used by C<$!>, | |
861 | and will be encoded in the SV in whatever manner would be used by C<$!>. | |
862 | The details of this process are subject to future change. Currently, | |
863 | the message is taken from the C locale by default (usually producing an | |
864 | English message), and from the currently selected locale when in the scope | |
865 | of the C<use locale> pragma. A heuristic attempt is made to decode the | |
866 | message from the locale's character encoding, but it will only be decoded | |
867 | as either UTF-8 or ISO-8859-1. It is always correctly decoded in a UTF-8 | |
868 | locale, usually in an ISO-8859-1 locale, and never in any other locale. | |
869 | ||
870 | The SV is always returned containing an actual string, and with no other | |
871 | OK bits set. Unlike C<$!>, a message is even yielded for C<errnum> zero | |
872 | (meaning success), and if no useful message is available then a useless | |
873 | string (currently empty) is returned. | |
874 | ||
875 | =cut | |
876 | */ | |
877 | ||
878 | SV * | |
879 | Perl_sv_string_from_errnum(pTHX_ int errnum, SV *tgtsv) | |
880 | { | |
881 | char const *errstr; | |
882 | if(!tgtsv) | |
883 | tgtsv = sv_newmortal(); | |
884 | errstr = my_strerror(errnum); | |
885 | if(errstr) { | |
886 | sv_setpv(tgtsv, errstr); | |
887 | fixup_errno_string(tgtsv); | |
888 | } else { | |
889 | SvPVCLEAR(tgtsv); | |
890 | } | |
891 | return tgtsv; | |
892 | } | |
893 | ||
25bbd826 CB |
894 | #ifdef VMS |
895 | #include <descrip.h> | |
896 | #include <starlet.h> | |
897 | #endif | |
898 | ||
79072805 | 899 | int |
864dbfa3 | 900 | Perl_magic_get(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 901 | { |
eb578fdb KW |
902 | I32 paren; |
903 | const char *s = NULL; | |
904 | REGEXP *rx; | |
823a54a3 | 905 | const char * const remaining = mg->mg_ptr + 1; |
e91d8259 | 906 | char nextchar; |
79072805 | 907 | |
7918f24d NC |
908 | PERL_ARGS_ASSERT_MAGIC_GET; |
909 | ||
e91d8259 | 910 | if (!mg->mg_ptr) { |
e91d8259 | 911 | paren = mg->mg_len; |
e91d8259 | 912 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
a6d0b1b5 | 913 | do_numbuf_fetch: |
e91d8259 | 914 | CALLREG_NUMBUF_FETCH(rx,paren,sv); |
e91d8259 | 915 | } |
e03e82a0 DM |
916 | else |
917 | goto set_undef; | |
e91d8259 NC |
918 | return 0; |
919 | } | |
920 | ||
921 | nextchar = *remaining; | |
79072805 | 922 | switch (*mg->mg_ptr) { |
748a9306 | 923 | case '\001': /* ^A */ |
f2da823f | 924 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
e03e82a0 DM |
925 | else |
926 | sv_set_undef(sv); | |
125b9982 NT |
927 | if (SvTAINTED(PL_bodytarget)) |
928 | SvTAINTED_on(sv); | |
748a9306 | 929 | break; |
e5218da5 | 930 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
823a54a3 | 931 | if (nextchar == '\0') { |
e5218da5 GA |
932 | sv_setiv(sv, (IV)PL_minus_c); |
933 | } | |
823a54a3 | 934 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { |
e5218da5 GA |
935 | sv_setiv(sv, (IV)STATUS_NATIVE); |
936 | } | |
49460fe6 NIS |
937 | break; |
938 | ||
79072805 | 939 | case '\004': /* ^D */ |
aea4f609 | 940 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
79072805 | 941 | break; |
28f23441 | 942 | case '\005': /* ^E */ |
6c6eab55 KW |
943 | if (nextchar != '\0') { |
944 | if (strEQ(remaining, "NCODING")) | |
3773545d | 945 | sv_set_undef(sv); |
4f4ff3a7 | 946 | break; |
6c6eab55 | 947 | } |
4f4ff3a7 KW |
948 | |
949 | #if defined(VMS) || defined(OS2) || defined(WIN32) | |
950 | # if defined(VMS) | |
2a99ff86 KW |
951 | { |
952 | char msg[255]; | |
953 | $DESCRIPTOR(msgdsc,msg); | |
954 | sv_setnv(sv,(NV) vaxc$errno); | |
955 | if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) | |
956 | sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); | |
957 | else | |
b2aed775 | 958 | SvPVCLEAR(sv); |
2a99ff86 | 959 | } |
4b645107 | 960 | #elif defined(OS2) |
2a99ff86 KW |
961 | if (!(_emx_env & 0x200)) { /* Under DOS */ |
962 | sv_setnv(sv, (NV)errno); | |
2c6ee1a7 | 963 | sv_setpv(sv, errno ? my_strerror(errno) : ""); |
2a99ff86 KW |
964 | } else { |
965 | if (errno != errno_isOS2) { | |
966 | const int tmp = _syserrno(); | |
967 | if (tmp) /* 2nd call to _syserrno() makes it 0 */ | |
968 | Perl_rc = tmp; | |
969 | } | |
970 | sv_setnv(sv, (NV)Perl_rc); | |
971 | sv_setpv(sv, os2error(Perl_rc)); | |
972 | } | |
1534c6f5 | 973 | if (SvOK(sv) && strNE(SvPVX(sv), "")) { |
99461a73 KW |
974 | fixup_errno_string(sv); |
975 | } | |
4f4ff3a7 | 976 | # elif defined(WIN32) |
2a99ff86 KW |
977 | { |
978 | const DWORD dwErr = GetLastError(); | |
979 | sv_setnv(sv, (NV)dwErr); | |
980 | if (dwErr) { | |
981 | PerlProc_GetOSError(sv, dwErr); | |
2efab60d | 982 | fixup_errno_string(sv); |
2a99ff86 KW |
983 | } |
984 | else | |
b2aed775 | 985 | SvPVCLEAR(sv); |
2a99ff86 KW |
986 | SetLastError(dwErr); |
987 | } | |
4f4ff3a7 KW |
988 | # else |
989 | # error Missing code for platform | |
990 | # endif | |
2a99ff86 KW |
991 | SvRTRIM(sv); |
992 | SvNOK_on(sv); /* what a wonderful hack! */ | |
993 | break; | |
4f4ff3a7 KW |
994 | #endif /* End of platforms with special handling for $^E; others just fall |
995 | through to $! */ | |
2165bd23 | 996 | /* FALLTHROUGH */ |
46f3e16c KW |
997 | |
998 | case '!': | |
999 | { | |
5f1b979d | 1000 | dSAVE_ERRNO; |
46f3e16c | 1001 | #ifdef VMS |
5f1b979d | 1002 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno)); |
46f3e16c | 1003 | #else |
5f1b979d | 1004 | sv_setnv(sv, (NV)errno); |
46f3e16c KW |
1005 | #endif |
1006 | #ifdef OS2 | |
5f1b979d KW |
1007 | if (errno == errno_isOS2 || errno == errno_isOS2_set) |
1008 | sv_setpv(sv, os2error(Perl_rc)); | |
1009 | else | |
46f3e16c | 1010 | #endif |
5f1b979d | 1011 | if (! errno) { |
b2aed775 | 1012 | SvPVCLEAR(sv); |
46f3e16c | 1013 | } |
5f1b979d | 1014 | else { |
658db622 Z |
1015 | sv_string_from_errnum(errno, sv); |
1016 | /* If no useful string is available, don't | |
1017 | * claim to have a string part. The SvNOK_on() | |
5f1b979d | 1018 | * below will cause just the number part to be valid */ |
658db622 Z |
1019 | if (!SvCUR(sv)) |
1020 | SvPOK_off(sv); | |
5f1b979d KW |
1021 | } |
1022 | RESTORE_ERRNO; | |
46f3e16c KW |
1023 | } |
1024 | ||
1025 | SvRTRIM(sv); | |
1026 | SvNOK_on(sv); /* what a wonderful hack! */ | |
1027 | break; | |
1028 | ||
79072805 | 1029 | case '\006': /* ^F */ |
9f601cf3 TC |
1030 | if (nextchar == '\0') { |
1031 | sv_setiv(sv, (IV)PL_maxsysfd); | |
1032 | } | |
79072805 | 1033 | break; |
9ebf26ad FR |
1034 | case '\007': /* ^GLOBAL_PHASE */ |
1035 | if (strEQ(remaining, "LOBAL_PHASE")) { | |
1036 | sv_setpvn(sv, PL_phase_names[PL_phase], | |
1037 | strlen(PL_phase_names[PL_phase])); | |
1038 | } | |
1039 | break; | |
a0d0e21e | 1040 | case '\010': /* ^H */ |
5d382c25 | 1041 | sv_setuv(sv, PL_hints); |
a0d0e21e | 1042 | break; |
9d116dd7 | 1043 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
120f7abe | 1044 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
79072805 | 1045 | break; |
8561ea1d FC |
1046 | case '\014': /* ^LAST_FH */ |
1047 | if (strEQ(remaining, "AST_FH")) { | |
745e740c | 1048 | if (PL_last_in_gv && (SV*)PL_last_in_gv != &PL_sv_undef) { |
8561ea1d FC |
1049 | assert(isGV_with_GP(PL_last_in_gv)); |
1050 | SV_CHECK_THINKFIRST_COW_DROP(sv); | |
1051 | prepare_SV_for_RV(sv); | |
1052 | SvOK_off(sv); | |
1053 | SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv)); | |
1054 | SvROK_on(sv); | |
1055 | sv_rvweaken(sv); | |
1056 | } | |
3773545d DM |
1057 | else |
1058 | sv_set_undef(sv); | |
8561ea1d FC |
1059 | } |
1060 | break; | |
ac27b0f5 | 1061 | case '\017': /* ^O & ^OPEN */ |
823a54a3 | 1062 | if (nextchar == '\0') { |
ac27b0f5 | 1063 | sv_setpv(sv, PL_osname); |
3511154c DM |
1064 | SvTAINTED_off(sv); |
1065 | } | |
823a54a3 | 1066 | else if (strEQ(remaining, "PEN")) { |
8b850bd5 | 1067 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); |
ac27b0f5 | 1068 | } |
28f23441 | 1069 | break; |
9ebf26ad | 1070 | case '\020': |
a6d0b1b5 | 1071 | sv_setiv(sv, (IV)PL_perldb); |
79072805 | 1072 | break; |
fb73857a | 1073 | case '\023': /* ^S */ |
f512d242 | 1074 | if (nextchar == '\0') { |
bc177e6b | 1075 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) |
0c34ef67 | 1076 | SvOK_off(sv); |
3280af22 | 1077 | else if (PL_in_eval) |
6dc8a9e4 | 1078 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); |
a4268c0a AMS |
1079 | else |
1080 | sv_setiv(sv, 0); | |
d58bf5aa | 1081 | } |
f512d242 KW |
1082 | else if (strEQ(remaining, "AFE_LOCALES")) { |
1083 | ||
1084 | #if ! defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE) | |
1085 | ||
1086 | sv_setuv(sv, (UV) 1); | |
1087 | ||
1088 | #else | |
1089 | sv_setuv(sv, (UV) 0); | |
1090 | ||
1091 | #endif | |
1092 | ||
1093 | } | |
fb73857a | 1094 | break; |
79072805 | 1095 | case '\024': /* ^T */ |
823a54a3 | 1096 | if (nextchar == '\0') { |
88e89b8a | 1097 | #ifdef BIG_TIME |
7c36658b | 1098 | sv_setnv(sv, PL_basetime); |
88e89b8a | 1099 | #else |
7c36658b | 1100 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 1101 | #endif |
7c36658b | 1102 | } |
823a54a3 | 1103 | else if (strEQ(remaining, "AINT")) |
284167a5 SM |
1104 | sv_setiv(sv, TAINTING_get |
1105 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) | |
9aa05f58 | 1106 | : 0); |
7c36658b | 1107 | break; |
e07ea26a | 1108 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
823a54a3 | 1109 | if (strEQ(remaining, "NICODE")) |
a05d7ebb | 1110 | sv_setuv(sv, (UV) PL_unicode); |
823a54a3 | 1111 | else if (strEQ(remaining, "TF8LOCALE")) |
7cebcbc0 | 1112 | sv_setuv(sv, (UV) PL_utf8locale); |
e07ea26a NC |
1113 | else if (strEQ(remaining, "TF8CACHE")) |
1114 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
1115 | break; |
1116 | case '\027': /* ^W & $^WARNING_BITS */ | |
823a54a3 | 1117 | if (nextchar == '\0') |
8298454c | 1118 | sv_setiv(sv, (IV)cBOOL(PL_dowarn & G_WARN_ON)); |
823a54a3 | 1119 | else if (strEQ(remaining, "ARNING_BITS")) { |
013b78e8 | 1120 | if (PL_compiling.cop_warnings == pWARN_NONE) { |
4438c4b7 | 1121 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; |
013b78e8 RGS |
1122 | } |
1123 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
e03e82a0 | 1124 | goto set_undef; |
013b78e8 | 1125 | } |
d3a7d8c7 | 1126 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
006c1a1d | 1127 | sv_setpvn(sv, WARN_ALLstring, WARNsize); |
ac27b0f5 | 1128 | } |
4438c4b7 | 1129 | else { |
72dc9ed5 NC |
1130 | sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1), |
1131 | *PL_compiling.cop_warnings); | |
ac27b0f5 | 1132 | } |
4438c4b7 | 1133 | } |
8ca2a5d6 DD |
1134 | #ifdef WIN32 |
1135 | else if (strEQ(remaining, "IN32_SLOPPY_STAT")) { | |
1136 | sv_setiv(sv, w32_sloppystat); | |
1137 | } | |
1138 | #endif | |
79072805 | 1139 | break; |
79072805 | 1140 | case '+': |
aaa362c4 | 1141 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
2c7b5d76 DM |
1142 | paren = RX_LASTPAREN(rx); |
1143 | if (paren) | |
1144 | goto do_numbuf_fetch; | |
79072805 | 1145 | } |
e03e82a0 | 1146 | goto set_undef; |
a01268b5 JH |
1147 | case '\016': /* ^N */ |
1148 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { | |
2c7b5d76 DM |
1149 | paren = RX_LASTCLOSEPAREN(rx); |
1150 | if (paren) | |
1151 | goto do_numbuf_fetch; | |
a01268b5 | 1152 | } |
e03e82a0 | 1153 | goto set_undef; |
79072805 | 1154 | case '.': |
3280af22 | 1155 | if (GvIO(PL_last_in_gv)) { |
357c8808 | 1156 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); |
79072805 | 1157 | } |
79072805 LW |
1158 | break; |
1159 | case '?': | |
809a5acc | 1160 | { |
809a5acc | 1161 | sv_setiv(sv, (IV)STATUS_CURRENT); |
ff0cee69 | 1162 | #ifdef COMPLEX_STATUS |
41cb7b2b | 1163 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
1164 | LvTARGOFF(sv) = PL_statusvalue; |
1165 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1166 | #endif |
809a5acc | 1167 | } |
79072805 LW |
1168 | break; |
1169 | case '^': | |
acbe1b9d | 1170 | if (GvIOp(PL_defoutgv)) |
099be4f1 | 1171 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); |
79072805 LW |
1172 | if (s) |
1173 | sv_setpv(sv,s); | |
1174 | else { | |
3280af22 | 1175 | sv_setpv(sv,GvENAME(PL_defoutgv)); |
cb421d5e | 1176 | sv_catpvs(sv,"_TOP"); |
79072805 LW |
1177 | } |
1178 | break; | |
1179 | case '~': | |
acbe1b9d | 1180 | if (GvIOp(PL_defoutgv)) |
0daa599b | 1181 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); |
79072805 | 1182 | if (!s) |
3280af22 | 1183 | s = GvENAME(PL_defoutgv); |
79072805 LW |
1184 | sv_setpv(sv,s); |
1185 | break; | |
79072805 | 1186 | case '=': |
099be4f1 | 1187 | if (GvIO(PL_defoutgv)) |
0daa599b | 1188 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); |
79072805 LW |
1189 | break; |
1190 | case '-': | |
099be4f1 | 1191 | if (GvIO(PL_defoutgv)) |
0daa599b | 1192 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); |
79072805 LW |
1193 | break; |
1194 | case '%': | |
099be4f1 | 1195 | if (GvIO(PL_defoutgv)) |
0daa599b | 1196 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); |
79072805 | 1197 | break; |
79072805 | 1198 | case ':': |
79072805 LW |
1199 | case '/': |
1200 | break; | |
1201 | case '[': | |
e1dccc0d | 1202 | sv_setiv(sv, 0); |
79072805 LW |
1203 | break; |
1204 | case '|': | |
099be4f1 | 1205 | if (GvIO(PL_defoutgv)) |
0daa599b | 1206 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); |
79072805 | 1207 | break; |
79072805 | 1208 | case '\\': |
b2ce0fda | 1209 | if (PL_ors_sv) |
f28098ff | 1210 | sv_copypv(sv, PL_ors_sv); |
4bac9ae4 | 1211 | else |
e03e82a0 | 1212 | goto set_undef; |
79072805 | 1213 | break; |
0e219455 | 1214 | case '$': /* $$ */ |
9cdac2a2 FC |
1215 | { |
1216 | IV const pid = (IV)PerlProc_getpid(); | |
19db9fb7 | 1217 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { |
9cdac2a2 FC |
1218 | /* never set manually, or at least not since last fork */ |
1219 | sv_setiv(sv, pid); | |
19db9fb7 Z |
1220 | /* never unsafe, even if reading in a tainted expression */ |
1221 | SvTAINTED_off(sv); | |
1222 | } | |
9cdac2a2 FC |
1223 | /* else a value has been assigned manually, so do nothing */ |
1224 | } | |
0e219455 | 1225 | break; |
79072805 | 1226 | case '<': |
dfff4baf | 1227 | sv_setuid(sv, PerlProc_getuid()); |
79072805 LW |
1228 | break; |
1229 | case '>': | |
dfff4baf | 1230 | sv_setuid(sv, PerlProc_geteuid()); |
79072805 LW |
1231 | break; |
1232 | case '(': | |
dfff4baf | 1233 | sv_setgid(sv, PerlProc_getgid()); |
79072805 LW |
1234 | goto add_groups; |
1235 | case ')': | |
dfff4baf | 1236 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1237 | add_groups: |
79072805 | 1238 | #ifdef HAS_GETGROUPS |
79072805 | 1239 | { |
57d7c65e | 1240 | Groups_t *gary = NULL; |
375ed12a JH |
1241 | I32 num_groups = getgroups(0, gary); |
1242 | if (num_groups > 0) { | |
19742f39 | 1243 | I32 i; |
375ed12a JH |
1244 | Newx(gary, num_groups, Groups_t); |
1245 | num_groups = getgroups(num_groups, gary); | |
1246 | for (i = 0; i < num_groups; i++) | |
147e3846 | 1247 | Perl_sv_catpvf(aTHX_ sv, " %" IVdf, (IV)gary[i]); |
375ed12a JH |
1248 | Safefree(gary); |
1249 | } | |
79072805 | 1250 | } |
155aba94 | 1251 | (void)SvIOK_on(sv); /* what a wonderful hack! */ |
cd70abae | 1252 | #endif |
79072805 | 1253 | break; |
79072805 LW |
1254 | case '0': |
1255 | break; | |
1256 | } | |
a0d0e21e | 1257 | return 0; |
e03e82a0 DM |
1258 | |
1259 | set_undef: | |
1260 | sv_set_undef(sv); | |
1261 | return 0; | |
79072805 LW |
1262 | } |
1263 | ||
1264 | int | |
864dbfa3 | 1265 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1266 | { |
8772537c | 1267 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1268 | |
7918f24d NC |
1269 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1270 | ||
79072805 | 1271 | if (uf && uf->uf_val) |
24f81a43 | 1272 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1273 | return 0; |
1274 | } | |
1275 | ||
1276 | int | |
864dbfa3 | 1277 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1278 | { |
9ae3433d | 1279 | STRLEN len = 0, klen; |
12033064 | 1280 | const char * const key = MgPV_const(mg,klen); |
888a67f6 | 1281 | const char *s = ""; |
1e422769 | 1282 | |
7918f24d NC |
1283 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1284 | ||
613c63b4 | 1285 | SvGETMAGIC(sv); |
12033064 | 1286 | if (SvOK(sv)) { |
613c63b4 CS |
1287 | /* defined environment variables are byte strings; unfortunately |
1288 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1289 | (void)SvPV_force_nomg_nolen(sv); | |
1290 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1291 | if (SvUTF8(sv)) { | |
1292 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1293 | SvUTF8_off(sv); | |
1294 | } | |
1295 | s = SvPVX(sv); | |
1296 | len = SvCUR(sv); | |
12033064 CS |
1297 | } |
1298 | my_setenv(key, s); /* does the deed */ | |
1299 | ||
a0d0e21e LW |
1300 | #ifdef DYNAMIC_ENV_FETCH |
1301 | /* We just undefd an environment var. Is a replacement */ | |
1302 | /* waiting in the wings? */ | |
1303 | if (!len) { | |
6bd66ee9 | 1304 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
fabdb6c0 | 1305 | if (valp) |
4ab59fcc | 1306 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; |
a0d0e21e LW |
1307 | } |
1308 | #endif | |
1e422769 | 1309 | |
28542d8f | 1310 | #if !defined(OS2) && !defined(WIN32) && !defined(MSDOS) |
79072805 LW |
1311 | /* And you'll never guess what the dog had */ |
1312 | /* in its mouth... */ | |
284167a5 | 1313 | if (TAINTING_get) { |
1e422769 PP |
1314 | MgTAINTEDDIR_off(mg); |
1315 | #ifdef VMS | |
b2aed775 | 1316 | if (s && memEQs(key, klen, "DCL$PATH")) { |
b8ffc8df | 1317 | char pathbuf[256], eltbuf[256], *cp, *elt; |
1e422769 PP |
1318 | int i = 0, j = 0; |
1319 | ||
6fca0082 | 1320 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); |
b8ffc8df | 1321 | elt = eltbuf; |
1e422769 PP |
1322 | do { /* DCL$PATH may be a search list */ |
1323 | while (1) { /* as may dev portion of any element */ | |
1324 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1325 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1326 | cando_by_name(S_IWUSR,0,elt) ) { | |
1327 | MgTAINTEDDIR_on(mg); | |
1328 | return 0; | |
1329 | } | |
1330 | } | |
bd61b366 | 1331 | if ((cp = strchr(elt, ':')) != NULL) |
1e422769 PP |
1332 | *cp = '\0'; |
1333 | if (my_trnlnm(elt, eltbuf, j++)) | |
1334 | elt = eltbuf; | |
1335 | else | |
1336 | break; | |
1337 | } | |
1338 | j = 0; | |
1339 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1340 | } | |
1341 | #endif /* VMS */ | |
b2aed775 | 1342 | if (s && memEQs(key, klen, "PATH")) { |
8772537c | 1343 | const char * const strend = s + len; |
463ee0b2 | 1344 | |
70b484a8 DM |
1345 | /* set MGf_TAINTEDDIR if any component of the new path is |
1346 | * relative or world-writeable */ | |
463ee0b2 | 1347 | while (s < strend) { |
96827780 | 1348 | char tmpbuf[256]; |
c623ac67 | 1349 | Stat_t st; |
5f74f29c | 1350 | I32 i; |
83269ced CB |
1351 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1352 | const char path_sep = PL_perllib_sep; | |
f5a63d97 AL |
1353 | #else |
1354 | const char path_sep = ':'; | |
1355 | #endif | |
ba0a4150 | 1356 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
427eaa01 | 1357 | s, strend, path_sep, &i); |
463ee0b2 | 1358 | s++; |
bb7a0f54 | 1359 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ |
83269ced CB |
1360 | #ifdef __VMS |
1361 | /* no colon thus no device name -- assume relative path */ | |
1362 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1363 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1364 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 CB |
1365 | #else |
1366 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ | |
1367 | #endif | |
c6ed36e1 | 1368 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
8990e307 | 1369 | MgTAINTEDDIR_on(mg); |
1e422769 PP |
1370 | return 0; |
1371 | } | |
463ee0b2 | 1372 | } |
79072805 LW |
1373 | } |
1374 | } | |
28542d8f | 1375 | #endif /* neither OS2 nor WIN32 nor MSDOS */ |
1e422769 | 1376 | |
79072805 LW |
1377 | return 0; |
1378 | } | |
1379 | ||
1380 | int | |
864dbfa3 | 1381 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1382 | { |
7918f24d | 1383 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1384 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1385 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1386 | return 0; |
1387 | } | |
1388 | ||
88e89b8a | 1389 | int |
864dbfa3 | 1390 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1391 | { |
7918f24d | 1392 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1393 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1394 | #if defined(VMS) |
cea2e8a9 | 1395 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1396 | #else |
3280af22 | 1397 | if (PL_localizing) { |
fb73857a | 1398 | HE* entry; |
b0269e46 | 1399 | my_clearenv(); |
85fbaab2 NC |
1400 | hv_iterinit(MUTABLE_HV(sv)); |
1401 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
fb73857a PP |
1402 | I32 keylen; |
1403 | my_setenv(hv_iterkey(entry, &keylen), | |
85fbaab2 | 1404 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); |
fb73857a PP |
1405 | } |
1406 | } | |
1407 | #endif | |
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | int | |
864dbfa3 | 1412 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1413 | { |
7918f24d | 1414 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1415 | PERL_UNUSED_ARG(sv); |
1416 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1417 | #if defined(VMS) |
1418 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1419 | #else | |
1420 | my_clearenv(); | |
1421 | #endif | |
3e3baf6d | 1422 | return 0; |
66b1d557 HM |
1423 | } |
1424 | ||
64ca3a65 | 1425 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1426 | #ifdef HAS_SIGPROCMASK |
1427 | static void | |
1428 | restore_sigmask(pTHX_ SV *save_sv) | |
1429 | { | |
0bd48802 | 1430 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1431 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1432 | } |
1433 | #endif | |
66b1d557 | 1434 | int |
864dbfa3 | 1435 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1436 | { |
88e89b8a | 1437 | /* Are we fetching a signal entry? */ |
708854f2 | 1438 | int i = (I16)mg->mg_private; |
7918f24d NC |
1439 | |
1440 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1441 | ||
708854f2 | 1442 | if (!i) { |
84c7b88c BF |
1443 | STRLEN siglen; |
1444 | const char * sig = MgPV_const(mg, siglen); | |
1445 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1446 | } |
1447 | ||
e02bfb16 | 1448 | if (i > 0) { |
22c35a8c GS |
1449 | if(PL_psig_ptr[i]) |
1450 | sv_setsv(sv,PL_psig_ptr[i]); | |
88e89b8a | 1451 | else { |
46da273f | 1452 | Sighandler_t sigstate = rsignal_state(i); |
23ada85b | 1453 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
46da273f AL |
1454 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1455 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1456 | #endif |
1457 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
46da273f AL |
1458 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1459 | sigstate = SIG_DFL; | |
85b332e2 | 1460 | #endif |
88e89b8a | 1461 | /* cache state so we don't fetch it again */ |
8aad04aa | 1462 | if(sigstate == (Sighandler_t) SIG_IGN) |
6502358f | 1463 | sv_setpvs(sv,"IGNORE"); |
88e89b8a | 1464 | else |
e03e82a0 | 1465 | sv_set_undef(sv); |
46da273f | 1466 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
88e89b8a PP |
1467 | SvTEMP_off(sv); |
1468 | } | |
1469 | } | |
1470 | return 0; | |
1471 | } | |
1472 | int | |
864dbfa3 | 1473 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1474 | { |
7918f24d | 1475 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1476 | |
38a124f0 | 1477 | magic_setsig(NULL, mg); |
179c85a2 | 1478 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1479 | } |
3d37d572 | 1480 | |
dc37125b | 1481 | |
5e7940ce | 1482 | #ifdef PERL_USE_3ARG_SIGHANDLER |
dc37125b DM |
1483 | Signal_t |
1484 | Perl_csighandler(int sig, Siginfo_t *sip, void *uap) | |
1485 | { | |
1486 | Perl_csighandler3(sig, sip, uap); | |
1487 | } | |
8aad04aa | 1488 | #else |
dc37125b | 1489 | Signal_t |
0a8e0eff | 1490 | Perl_csighandler(int sig) |
dc37125b DM |
1491 | { |
1492 | Perl_csighandler3(sig, NULL, NULL); | |
1493 | } | |
8aad04aa | 1494 | #endif |
dc37125b DM |
1495 | |
1496 | Signal_t | |
1497 | Perl_csighandler1(int sig) | |
1498 | { | |
1499 | Perl_csighandler3(sig, NULL, NULL); | |
1500 | } | |
1501 | ||
1502 | /* Handler intended to directly handle signal calls from the kernel. | |
1503 | * (Depending on configuration, the kernel may actually call one of the | |
1504 | * wrappers csighandler() or csighandler1() instead.) | |
1505 | * It either queues up the signal or dispatches it immediately depending | |
1506 | * on whether safe signals are enabled and whether the signal is capable | |
1507 | * of being deferred (e.g. SEGV isn't). | |
1508 | */ | |
1509 | ||
1510 | Signal_t | |
1511 | Perl_csighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
0a8e0eff | 1512 | { |
1018e26f NIS |
1513 | #ifdef PERL_GET_SIG_CONTEXT |
1514 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1515 | #else | |
85b332e2 CL |
1516 | dTHX; |
1517 | #endif | |
5e7940ce DM |
1518 | |
1519 | #ifdef PERL_USE_3ARG_SIGHANDLER | |
ffb6256b JH |
1520 | #if defined(__cplusplus) && defined(__GNUC__) |
1521 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1522 | * parameters would be warned about. */ | |
1523 | PERL_UNUSED_ARG(sip); | |
1524 | PERL_UNUSED_ARG(uap); | |
1525 | #endif | |
1271a1be | 1526 | #endif |
5e7940ce | 1527 | |
23ada85b | 1528 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1529 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1530 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1531 | #endif |
2e34cc90 | 1532 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1533 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1534 | #ifdef KILL_BY_SIGPRC |
1535 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1536 | #else | |
1537 | exit(1); | |
1538 | #endif | |
1539 | #endif | |
406878dd | 1540 | if ( |
853d2c32 RGS |
1541 | #ifdef SIGILL |
1542 | sig == SIGILL || | |
1543 | #endif | |
1544 | #ifdef SIGBUS | |
1545 | sig == SIGBUS || | |
1546 | #endif | |
1547 | #ifdef SIGSEGV | |
1548 | sig == SIGSEGV || | |
1549 | #endif | |
1550 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) | |
4ffa73a3 | 1551 | /* Call the perl level handler now-- |
31c91b43 | 1552 | * with risk we may be in malloc() or being destructed etc. */ |
8a5e470b DM |
1553 | { |
1554 | if (PL_sighandlerp == Perl_sighandler) | |
1555 | /* default handler, so can call perly_sighandler() directly | |
1556 | * rather than via Perl_sighandler, passing the extra | |
1557 | * 'safe = false' arg | |
1558 | */ | |
ddb513d5 | 1559 | Perl_perly_sighandler(sig, NULL, NULL, 0 /* unsafe */); |
8a5e470b | 1560 | else |
5e7940ce | 1561 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1562 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1563 | #else |
8a5e470b | 1564 | (*PL_sighandlerp)(sig); |
92807b6d | 1565 | #endif |
8a5e470b | 1566 | } |
406878dd | 1567 | else { |
31c91b43 | 1568 | if (!PL_psig_pend) return; |
406878dd GA |
1569 | /* Set a flag to say this signal is pending, that is awaiting delivery after |
1570 | * the current Perl opcode completes */ | |
1571 | PL_psig_pend[sig]++; | |
1572 | ||
1573 | #ifndef SIG_PENDING_DIE_COUNT | |
1574 | # define SIG_PENDING_DIE_COUNT 120 | |
1575 | #endif | |
fe13d51d | 1576 | /* Add one to say _a_ signal is pending */ |
406878dd GA |
1577 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) |
1578 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1579 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
1580 | } | |
0a8e0eff NIS |
1581 | } |
1582 | ||
2e34cc90 CL |
1583 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1584 | void | |
1585 | Perl_csighandler_init(void) | |
1586 | { | |
1587 | int sig; | |
27da23d5 | 1588 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1589 | |
1590 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1591 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1592 | dTHX; |
27da23d5 | 1593 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1594 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1595 | #endif |
1596 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1597 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1598 | #endif |
1599 | } | |
27da23d5 | 1600 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1601 | } |
1602 | #endif | |
1603 | ||
7fe50b8b LT |
1604 | #if defined HAS_SIGPROCMASK |
1605 | static void | |
1606 | unblock_sigmask(pTHX_ void* newset) | |
1607 | { | |
dc3bf405 | 1608 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1609 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1610 | } | |
1611 | #endif | |
1612 | ||
0a8e0eff NIS |
1613 | void |
1614 | Perl_despatch_signals(pTHX) | |
1615 | { | |
1616 | int sig; | |
1617 | PL_sig_pending = 0; | |
1618 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1619 | if (PL_psig_pend[sig]) { | |
d0166017 | 1620 | dSAVE_ERRNO; |
7fe50b8b | 1621 | #ifdef HAS_SIGPROCMASK |
55534442 LT |
1622 | /* From sigaction(2) (FreeBSD man page): |
1623 | * | Signal routines normally execute with the signal that | |
1624 | * | caused their invocation blocked, but other signals may | |
1625 | * | yet occur. | |
1626 | * Emulation of this behavior (from within Perl) is enabled | |
1627 | * using sigprocmask | |
1628 | */ | |
1629 | int was_blocked; | |
1630 | sigset_t newset, oldset; | |
1631 | ||
1632 | sigemptyset(&newset); | |
1633 | sigaddset(&newset, sig); | |
1634 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1635 | was_blocked = sigismember(&oldset, sig); | |
7fe50b8b LT |
1636 | if (!was_blocked) { |
1637 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1638 | ENTER; | |
1639 | SAVEFREESV(save_sv); | |
1640 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1641 | } | |
55534442 | 1642 | #endif |
25da4428 | 1643 | PL_psig_pend[sig] = 0; |
8a5e470b DM |
1644 | if (PL_sighandlerp == Perl_sighandler) |
1645 | /* default handler, so can call perly_sighandler() directly | |
1646 | * rather than via Perl_sighandler, passing the extra | |
1647 | * 'safe = true' arg | |
1648 | */ | |
1649 | Perl_perly_sighandler(sig, NULL, NULL, 1 /* safe */); | |
1650 | else | |
5e7940ce | 1651 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b | 1652 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 | 1653 | #else |
8a5e470b | 1654 | (*PL_sighandlerp)(sig); |
92807b6d | 1655 | #endif |
8a5e470b | 1656 | |
7fe50b8b | 1657 | #ifdef HAS_SIGPROCMASK |
55534442 | 1658 | if (!was_blocked) |
7fe50b8b | 1659 | LEAVE; |
55534442 | 1660 | #endif |
d0166017 | 1661 | RESTORE_ERRNO; |
0a8e0eff NIS |
1662 | } |
1663 | } | |
1664 | } | |
1665 | ||
38a124f0 | 1666 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1667 | int |
864dbfa3 | 1668 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1669 | { |
27da23d5 | 1670 | dVAR; |
79072805 | 1671 | I32 i; |
cbbf8932 | 1672 | SV** svp = NULL; |
2d4fcd5e AJ |
1673 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1674 | * effects (due to closures). We must make sure that the new disposition | |
1675 | * is in place before it is called. | |
1676 | */ | |
cbbf8932 | 1677 | SV* to_dec = NULL; |
e72dc28c | 1678 | STRLEN len; |
2d4fcd5e AJ |
1679 | #ifdef HAS_SIGPROCMASK |
1680 | sigset_t set, save; | |
1681 | SV* save_sv; | |
1682 | #endif | |
eb578fdb | 1683 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1684 | |
1685 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1686 | ||
748a9306 | 1687 | if (*s == '_') { |
84c7b88c | 1688 | if (memEQs(s, len, "__DIE__")) |
3280af22 | 1689 | svp = &PL_diehook; |
84c7b88c | 1690 | else if (memEQs(s, len, "__WARN__") |
38a124f0 NC |
1691 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { |
1692 | /* Merge the existing behaviours, which are as follows: | |
1693 | magic_setsig, we always set svp to &PL_warnhook | |
1694 | (hence we always change the warnings handler) | |
1695 | For magic_clearsig, we don't change the warnings handler if it's | |
1696 | set to the &PL_warnhook. */ | |
3280af22 | 1697 | svp = &PL_warnhook; |
84c7b88c BF |
1698 | } else if (sv) { |
1699 | SV *tmp = sv_newmortal(); | |
1700 | Perl_croak(aTHX_ "No such hook: %s", | |
1701 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1702 | } | |
748a9306 | 1703 | i = 0; |
38a124f0 | 1704 | if (svp && *svp) { |
9289f461 RGS |
1705 | if (*svp != PERL_WARNHOOK_FATAL) |
1706 | to_dec = *svp; | |
cbbf8932 | 1707 | *svp = NULL; |
4633a7c4 | 1708 | } |
748a9306 LW |
1709 | } |
1710 | else { | |
708854f2 NC |
1711 | i = (I16)mg->mg_private; |
1712 | if (!i) { | |
84c7b88c | 1713 | i = whichsig_pvn(s, len); /* ...no, a brick */ |
58a26b12 | 1714 | mg->mg_private = (U16)i; |
708854f2 | 1715 | } |
86d86cad | 1716 | if (i <= 0) { |
84c7b88c BF |
1717 | if (sv) { |
1718 | SV *tmp = sv_newmortal(); | |
1719 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", | |
1720 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1721 | } | |
748a9306 LW |
1722 | return 0; |
1723 | } | |
2d4fcd5e AJ |
1724 | #ifdef HAS_SIGPROCMASK |
1725 | /* Avoid having the signal arrive at a bad time, if possible. */ | |
1726 | sigemptyset(&set); | |
1727 | sigaddset(&set,i); | |
1728 | sigprocmask(SIG_BLOCK, &set, &save); | |
1729 | ENTER; | |
9ff8e806 | 1730 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); |
2d4fcd5e AJ |
1731 | SAVEFREESV(save_sv); |
1732 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1733 | #endif | |
1734 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1735 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
27da23d5 | 1736 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1737 | #endif |
23ada85b | 1738 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
27da23d5 | 1739 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1740 | #endif |
2e34cc90 | 1741 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1742 | PL_sig_defaulting[i] = 0; |
2e34cc90 | 1743 | #endif |
2d4fcd5e | 1744 | to_dec = PL_psig_ptr[i]; |
38a124f0 NC |
1745 | if (sv) { |
1746 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1747 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
79fd3822 NC |
1748 | |
1749 | /* Signals don't change name during the program's execution, so once | |
1750 | they're cached in the appropriate slot of PL_psig_name, they can | |
1751 | stay there. | |
1752 | ||
1753 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1754 | at least, doing most of the work. */ | |
1755 | if (!PL_psig_name[i]) { | |
92d4124b TR |
1756 | const char* name = PL_sig_name[i]; |
1757 | PL_psig_name[i] = newSVpvn(name, strlen(name)); | |
79fd3822 NC |
1758 | SvREADONLY_on(PL_psig_name[i]); |
1759 | } | |
38a124f0 | 1760 | } else { |
79fd3822 | 1761 | SvREFCNT_dec(PL_psig_name[i]); |
38a124f0 NC |
1762 | PL_psig_name[i] = NULL; |
1763 | PL_psig_ptr[i] = NULL; | |
1764 | } | |
748a9306 | 1765 | } |
38a124f0 | 1766 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
2d4fcd5e | 1767 | if (i) { |
5c1546dc | 1768 | (void)rsignal(i, PL_csighandlerp); |
2d4fcd5e | 1769 | } |
748a9306 | 1770 | else |
b37c2d43 | 1771 | *svp = SvREFCNT_inc_simple_NN(sv); |
38a124f0 | 1772 | } else { |
9dfa190b NC |
1773 | if (sv && SvOK(sv)) { |
1774 | s = SvPV_force(sv, len); | |
1775 | } else { | |
1776 | sv = NULL; | |
1777 | } | |
84c7b88c | 1778 | if (sv && memEQs(s, len,"IGNORE")) { |
9dfa190b | 1779 | if (i) { |
23ada85b | 1780 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
9dfa190b NC |
1781 | PL_sig_ignoring[i] = 1; |
1782 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1783 | #else |
9dfa190b | 1784 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1785 | #endif |
9dfa190b | 1786 | } |
2d4fcd5e | 1787 | } |
84c7b88c | 1788 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { |
9dfa190b | 1789 | if (i) { |
2e34cc90 | 1790 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
9dfa190b NC |
1791 | PL_sig_defaulting[i] = 1; |
1792 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1793 | #else |
9dfa190b | 1794 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
2e34cc90 | 1795 | #endif |
9dfa190b NC |
1796 | } |
1797 | } | |
1798 | else { | |
1799 | /* | |
1800 | * We should warn if HINT_STRICT_REFS, but without | |
1801 | * access to a known hint bit in a known OP, we can't | |
1802 | * tell whether HINT_STRICT_REFS is in force or not. | |
1803 | */ | |
0687887e | 1804 | if (!memchr(s, ':', len) && !memchr(s, '\'', len)) |
9dfa190b NC |
1805 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), |
1806 | SV_GMAGIC); | |
1807 | if (i) | |
1808 | (void)rsignal(i, PL_csighandlerp); | |
1809 | else | |
1810 | *svp = SvREFCNT_inc_simple_NN(sv); | |
136e0459 | 1811 | } |
748a9306 | 1812 | } |
9dfa190b | 1813 | |
2d4fcd5e AJ |
1814 | #ifdef HAS_SIGPROCMASK |
1815 | if(i) | |
1816 | LEAVE; | |
1817 | #endif | |
ef8d46e8 | 1818 | SvREFCNT_dec(to_dec); |
79072805 LW |
1819 | return 0; |
1820 | } | |
64ca3a65 | 1821 | #endif /* !PERL_MICRO */ |
79072805 LW |
1822 | |
1823 | int | |
864dbfa3 | 1824 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1825 | { |
7918f24d | 1826 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1827 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1828 | |
89c14e2e | 1829 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1830 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
89c14e2e BB |
1831 | return 0; |
1832 | ||
0e446081 | 1833 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1834 | } |
1835 | ||
0e446081 | 1836 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1837 | int |
52b45067 RD |
1838 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1839 | { | |
52b45067 | 1840 | HV* stash; |
7918f24d NC |
1841 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1842 | ||
52b45067 | 1843 | /* Bail out if destruction is going on */ |
627364f1 | 1844 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1845 | |
0e446081 NC |
1846 | if (sv) |
1847 | av_clear(MUTABLE_AV(sv)); | |
52b45067 | 1848 | |
6624142a FC |
1849 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1850 | /* This occurs with setisa_elem magic, which calls this | |
1851 | same function. */ | |
1852 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
1853 | ||
316ebaf2 | 1854 | assert(mg); |
6624142a FC |
1855 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1856 | SV **svp = AvARRAY((AV *)mg->mg_obj); | |
1857 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1858 | while (items--) { | |
1859 | stash = GvSTASH((GV *)*svp++); | |
1860 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1861 | } | |
1862 | ||
1863 | return 0; | |
1864 | } | |
1865 | ||
52b45067 | 1866 | stash = GvSTASH( |
6624142a | 1867 | (const GV *)mg->mg_obj |
52b45067 RD |
1868 | ); |
1869 | ||
00169e2c FC |
1870 | /* The stash may have been detached from the symbol table, so check its |
1871 | name before doing anything. */ | |
1872 | if (stash && HvENAME_get(stash)) | |
5562fa71 | 1873 | mro_isa_changed_in(stash); |
52b45067 RD |
1874 | |
1875 | return 0; | |
1876 | } | |
1877 | ||
1878 | int | |
864dbfa3 | 1879 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1880 | { |
85fbaab2 | 1881 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1882 | I32 i = 0; |
7918f24d NC |
1883 | |
1884 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1885 | PERL_UNUSED_ARG(mg); |
7719e241 | 1886 | |
6ff81951 | 1887 | if (hv) { |
497b47a8 | 1888 | (void) hv_iterinit(hv); |
ad64d0ec | 1889 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1b95d04f | 1890 | i = HvUSEDKEYS(hv); |
497b47a8 JH |
1891 | else { |
1892 | while (hv_iternext(hv)) | |
1893 | i++; | |
1894 | } | |
6ff81951 GS |
1895 | } |
1896 | ||
1897 | sv_setiv(sv, (IV)i); | |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | int | |
864dbfa3 | 1902 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1903 | { |
7918f24d | 1904 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1905 | PERL_UNUSED_ARG(mg); |
946ec16e | 1906 | if (LvTARG(sv)) { |
85fbaab2 | 1907 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e PP |
1908 | } |
1909 | return 0; | |
ac27b0f5 | 1910 | } |
946ec16e | 1911 | |
efaf3674 DM |
1912 | /* |
1913 | =for apidoc magic_methcall | |
1914 | ||
1915 | Invoke a magic method (like FETCH). | |
1916 | ||
2baee27b FC |
1917 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1918 | ||
1919 | C<meth> is the name of the method to call. | |
1920 | ||
1921 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1922 | ||
1923 | The C<flags> can be: | |
1924 | ||
1925 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1926 | return a value | |
1927 | G_UNDEF_FILL fill the stack with argc pointers to | |
1928 | PL_sv_undef | |
1929 | ||
1930 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1931 | |
796b6530 | 1932 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1933 | |
1934 | ||
1935 | =cut | |
1936 | */ | |
1937 | ||
1938 | SV* | |
36925d9e | 1939 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
046b0c7d | 1940 | U32 argc, ...) |
a0d0e21e LW |
1941 | { |
1942 | dSP; | |
efaf3674 | 1943 | SV* ret = NULL; |
463ee0b2 | 1944 | |
7918f24d NC |
1945 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1946 | ||
efaf3674 | 1947 | ENTER; |
d1d7a15d NC |
1948 | |
1949 | if (flags & G_WRITING_TO_STDERR) { | |
1950 | SAVETMPS; | |
1951 | ||
2782061f | 1952 | save_re_context(); |
d1d7a15d NC |
1953 | SAVESPTR(PL_stderrgv); |
1954 | PL_stderrgv = NULL; | |
1955 | } | |
1956 | ||
efaf3674 | 1957 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1958 | PUSHMARK(SP); |
efaf3674 | 1959 | |
052a7c76 DM |
1960 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1961 | assert(argc <= I32_MAX); | |
1962 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1963 | PUSHs(SvTIED_obj(sv, mg)); |
1964 | if (flags & G_UNDEF_FILL) { | |
1965 | while (argc--) { | |
efaf3674 | 1966 | PUSHs(&PL_sv_undef); |
93965878 | 1967 | } |
67549bd2 | 1968 | } else if (argc > 0) { |
046b0c7d NC |
1969 | va_list args; |
1970 | va_start(args, argc); | |
1971 | ||
1972 | do { | |
35bc1e35 JK |
1973 | SV *const this_sv = va_arg(args, SV *); |
1974 | PUSHs(this_sv); | |
046b0c7d NC |
1975 | } while (--argc); |
1976 | ||
1977 | va_end(args); | |
88e89b8a | 1978 | } |
463ee0b2 | 1979 | PUTBACK; |
efaf3674 | 1980 | if (flags & G_DISCARD) { |
36925d9e | 1981 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1982 | } |
1983 | else { | |
36925d9e | 1984 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
efaf3674 DM |
1985 | ret = *PL_stack_sp--; |
1986 | } | |
1987 | POPSTACK; | |
d1d7a15d NC |
1988 | if (flags & G_WRITING_TO_STDERR) |
1989 | FREETMPS; | |
efaf3674 DM |
1990 | LEAVE; |
1991 | return ret; | |
1992 | } | |
1993 | ||
efaf3674 | 1994 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 1995 | |
efaf3674 | 1996 | STATIC SV* |
36925d9e | 1997 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
1998 | int n, SV *val) |
1999 | { | |
efaf3674 DM |
2000 | SV* arg1 = NULL; |
2001 | ||
2002 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
2003 | ||
2004 | if (mg->mg_ptr) { | |
2005 | if (mg->mg_len >= 0) { | |
db4b3a1d | 2006 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
efaf3674 DM |
2007 | } |
2008 | else if (mg->mg_len == HEf_SVKEY) | |
2009 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
2010 | } | |
2011 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
db4b3a1d | 2012 | arg1 = newSViv((IV)(mg->mg_len)); |
efaf3674 DM |
2013 | sv_2mortal(arg1); |
2014 | } | |
2015 | if (!arg1) { | |
046b0c7d | 2016 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 2017 | } |
046b0c7d | 2018 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e PP |
2019 | } |
2020 | ||
76e3520e | 2021 | STATIC int |
36925d9e | 2022 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 2023 | { |
efaf3674 | 2024 | SV* ret; |
463ee0b2 | 2025 | |
7918f24d NC |
2026 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
2027 | ||
efaf3674 DM |
2028 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
2029 | if (ret) | |
2030 | sv_setsv(sv, ret); | |
a0d0e21e LW |
2031 | return 0; |
2032 | } | |
463ee0b2 | 2033 | |
a0d0e21e | 2034 | int |
864dbfa3 | 2035 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2036 | { |
7918f24d NC |
2037 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
2038 | ||
fd69380d | 2039 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
a0d0e21e | 2040 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 2041 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
2042 | return 0; |
2043 | } | |
2044 | ||
2045 | int | |
864dbfa3 | 2046 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 2047 | { |
b112cff9 DM |
2048 | MAGIC *tmg; |
2049 | SV *val; | |
7918f24d NC |
2050 | |
2051 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
2052 | ||
b112cff9 DM |
2053 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
2054 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
2055 | * public flags indicate its value based on copying from $val. Doing | |
2056 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
2057 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
2058 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
2059 | * enabled, even though taint magic is in the chain. In which case, | |
2060 | * fake up a temporary tainted value (this is easier than temporarily | |
2061 | * re-enabling magic on sv). */ | |
2062 | ||
284167a5 | 2063 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
b112cff9 DM |
2064 | && (tmg->mg_len & 1)) |
2065 | { | |
2066 | val = sv_mortalcopy(sv); | |
2067 | SvTAINTED_on(val); | |
2068 | } | |
2069 | else | |
2070 | val = sv; | |
2071 | ||
36925d9e | 2072 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
2073 | return 0; |
2074 | } | |
2075 | ||
2076 | int | |
864dbfa3 | 2077 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2078 | { |
7918f24d NC |
2079 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
2080 | ||
4c13be3f | 2081 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 2082 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 2083 | } |
463ee0b2 | 2084 | |
93965878 NIS |
2085 | |
2086 | U32 | |
864dbfa3 | 2087 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 2088 | { |
22846ab4 | 2089 | I32 retval = 0; |
efaf3674 | 2090 | SV* retsv; |
93965878 | 2091 | |
7918f24d NC |
2092 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
2093 | ||
36925d9e | 2094 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 DM |
2095 | if (retsv) { |
2096 | retval = SvIV(retsv)-1; | |
22846ab4 AB |
2097 | if (retval < -1) |
2098 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 2099 | } |
22846ab4 | 2100 | return (U32) retval; |
93965878 NIS |
2101 | } |
2102 | ||
cea2e8a9 GS |
2103 | int |
2104 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 2105 | { |
7918f24d NC |
2106 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
2107 | ||
36925d9e | 2108 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
2109 | return 0; |
2110 | } | |
2111 | ||
2112 | int | |
864dbfa3 | 2113 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 2114 | { |
efaf3674 | 2115 | SV* ret; |
463ee0b2 | 2116 | |
7918f24d NC |
2117 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
2118 | ||
36925d9e RZ |
2119 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
2120 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); | |
efaf3674 DM |
2121 | if (ret) |
2122 | sv_setsv(key,ret); | |
79072805 LW |
2123 | return 0; |
2124 | } | |
2125 | ||
2126 | int | |
1146e912 | 2127 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 2128 | { |
7918f24d NC |
2129 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
2130 | ||
36925d9e | 2131 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 2132 | } |
a0d0e21e | 2133 | |
a3bcc51e TP |
2134 | SV * |
2135 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
2136 | { | |
5fcbf73d | 2137 | SV *retval; |
ad64d0ec NC |
2138 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
2139 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 2140 | |
7918f24d NC |
2141 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
2142 | ||
a3bcc51e TP |
2143 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
2144 | SV *key; | |
bfcb3514 | 2145 | if (HvEITER_get(hv)) |
a3bcc51e TP |
2146 | /* we are in an iteration so the hash cannot be empty */ |
2147 | return &PL_sv_yes; | |
2148 | /* no xhv_eiter so now use FIRSTKEY */ | |
2149 | key = sv_newmortal(); | |
ad64d0ec | 2150 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 2151 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
2152 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
2153 | } | |
2154 | ||
2155 | /* there is a SCALAR method that we can call */ | |
36925d9e | 2156 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 2157 | if (!retval) |
5fcbf73d | 2158 | retval = &PL_sv_undef; |
a3bcc51e TP |
2159 | return retval; |
2160 | } | |
2161 | ||
a0d0e21e | 2162 | int |
864dbfa3 | 2163 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2164 | { |
089b5c60 | 2165 | SV **svp; |
7918f24d NC |
2166 | |
2167 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2168 | ||
089b5c60 NC |
2169 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2170 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
147e3846 | 2171 | Perl_croak(aTHX_ "panic: magic_setdbline len=%" IVdf ", ptr='%s'", |
7b0eb0b8 | 2172 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2173 | } |
2174 | ||
2175 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2176 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a FC |
2177 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
2178 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); | |
089b5c60 | 2179 | |
8772537c | 2180 | if (svp && SvIOKp(*svp)) { |
88df5f01 FC |
2181 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2182 | if (o) { | |
2183 | #ifdef PERL_DEBUG_READONLY_OPS | |
2184 | Slab_to_rw(OpSLAB(o)); | |
2185 | #endif | |
2186 | /* set or clear breakpoint in the relevant control op */ | |
089b5c60 | 2187 | if (SvTRUE(sv)) |
88df5f01 | 2188 | o->op_flags |= OPf_SPECIAL; |
8772537c | 2189 | else |
88df5f01 FC |
2190 | o->op_flags &= ~OPf_SPECIAL; |
2191 | #ifdef PERL_DEBUG_READONLY_OPS | |
2192 | Slab_to_ro(OpSLAB(o)); | |
2193 | #endif | |
8772537c | 2194 | } |
5df8de69 | 2195 | } |
79072805 LW |
2196 | return 0; |
2197 | } | |
2198 | ||
2199 | int | |
8772537c | 2200 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2201 | { |
502c6561 | 2202 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2203 | |
2204 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2205 | ||
83bf042f | 2206 | if (obj) { |
e1dccc0d | 2207 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2208 | } else { |
3773545d | 2209 | sv_set_undef(sv); |
83bf042f | 2210 | } |
79072805 LW |
2211 | return 0; |
2212 | } | |
2213 | ||
2214 | int | |
864dbfa3 | 2215 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2216 | { |
502c6561 | 2217 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2218 | |
2219 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2220 | ||
83bf042f | 2221 | if (obj) { |
e1dccc0d | 2222 | av_fill(obj, SvIV(sv)); |
83bf042f | 2223 | } else { |
a2a5de95 NC |
2224 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2225 | "Attempt to set length of freed array"); | |
83bf042f NC |
2226 | } |
2227 | return 0; | |
2228 | } | |
2229 | ||
2230 | int | |
83f29afa VP |
2231 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2232 | { | |
83f29afa VP |
2233 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2234 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2235 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2236 | |
2237 | /* Reset the iterator when the array is cleared */ | |
4803e7f7 Z |
2238 | if (sizeof(IV) == sizeof(SSize_t)) { |
2239 | *((IV *) &(mg->mg_len)) = 0; | |
2240 | } else { | |
2241 | if (mg->mg_ptr) | |
2242 | *((IV *) mg->mg_ptr) = 0; | |
2243 | } | |
83f29afa VP |
2244 | |
2245 | return 0; | |
2246 | } | |
2247 | ||
2248 | int | |
83bf042f NC |
2249 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2250 | { | |
7918f24d | 2251 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2252 | PERL_UNUSED_ARG(sv); |
7918f24d | 2253 | |
94f3782b DM |
2254 | /* during global destruction, mg_obj may already have been freed */ |
2255 | if (PL_in_clean_all) | |
1ea47f64 | 2256 | return 0; |
94f3782b | 2257 | |
83bf042f NC |
2258 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2259 | ||
2260 | if (mg) { | |
2261 | /* arylen scalar holds a pointer back to the array, but doesn't own a | |
2262 | reference. Hence the we (the array) are about to go away with it | |
2263 | still pointing at us. Clear its pointer, else it would be pointing | |
2264 | at free memory. See the comment in sv_magic about reference loops, | |
2265 | and why it can't own a reference to us. */ | |
2266 | mg->mg_obj = 0; | |
2267 | } | |
a0d0e21e LW |
2268 | return 0; |
2269 | } | |
2270 | ||
2271 | int | |
864dbfa3 | 2272 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2273 | { |
16eb5365 | 2274 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2275 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2276 | |
2277 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2278 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2279 | |
6174b39a FC |
2280 | if (found && found->mg_len != -1) { |
2281 | STRLEN i = found->mg_len; | |
25fdce4a | 2282 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) |
6174b39a FC |
2283 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); |
2284 | sv_setuv(sv, i); | |
a0d0e21e | 2285 | return 0; |
a0d0e21e | 2286 | } |
3773545d | 2287 | sv_set_undef(sv); |
a0d0e21e LW |
2288 | return 0; |
2289 | } | |
2290 | ||
2291 | int | |
864dbfa3 | 2292 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2293 | { |
16eb5365 | 2294 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2295 | SSize_t pos; |
2296 | STRLEN len; | |
53d44271 | 2297 | MAGIC* found; |
aec43834 | 2298 | const char *s; |
a0d0e21e | 2299 | |
7918f24d | 2300 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2301 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2302 | |
96c2a8ff | 2303 | found = mg_find_mglob(lsv); |
3881461a | 2304 | if (!found) { |
a0d0e21e LW |
2305 | if (!SvOK(sv)) |
2306 | return 0; | |
96c2a8ff | 2307 | found = sv_magicext_mglob(lsv); |
a0d0e21e LW |
2308 | } |
2309 | else if (!SvOK(sv)) { | |
3881461a | 2310 | found->mg_len = -1; |
a0d0e21e LW |
2311 | return 0; |
2312 | } | |
aec43834 | 2313 | s = SvPV_const(lsv, len); |
a0d0e21e | 2314 | |
e1dccc0d | 2315 | pos = SvIV(sv); |
a0ed51b3 | 2316 | |
7e2040f0 | 2317 | if (DO_UTF8(lsv)) { |
19742f39 | 2318 | const STRLEN ulen = sv_or_pv_len_utf8(lsv, s, len); |
a0ed51b3 LW |
2319 | if (ulen) |
2320 | len = ulen; | |
a0ed51b3 LW |
2321 | } |
2322 | ||
a0d0e21e LW |
2323 | if (pos < 0) { |
2324 | pos += len; | |
2325 | if (pos < 0) | |
2326 | pos = 0; | |
2327 | } | |
eb160463 | 2328 | else if (pos > (SSize_t)len) |
a0d0e21e | 2329 | pos = len; |
a0ed51b3 | 2330 | |
3881461a | 2331 | found->mg_len = pos; |
25fdce4a | 2332 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2333 | |
79072805 LW |
2334 | return 0; |
2335 | } | |
2336 | ||
2337 | int | |
864dbfa3 | 2338 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2339 | { |
2340 | STRLEN len; | |
35a4481c | 2341 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2342 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2343 | STRLEN offs = LvTARGOFF(sv); |
2344 | STRLEN rem = LvTARGLEN(sv); | |
b063b0a8 DIM |
2345 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2346 | const bool negrem = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2347 | |
2348 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2349 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2350 | |
83f78d1a | 2351 | if (!translate_substr_offsets( |
4ddea69a | 2352 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
83f78d1a FC |
2353 | negoff ? -(IV)offs : (IV)offs, !negoff, |
2354 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
2355 | )) { | |
2356 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); | |
e03e82a0 | 2357 | sv_set_undef(sv); |
83f78d1a FC |
2358 | return 0; |
2359 | } | |
2360 | ||
9aa983d2 | 2361 | if (SvUTF8(lsv)) |
4ddea69a | 2362 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2363 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2364 | if (SvUTF8(lsv)) |
2ef4b674 | 2365 | SvUTF8_on(sv); |
6ff81951 GS |
2366 | return 0; |
2367 | } | |
2368 | ||
2369 | int | |
864dbfa3 | 2370 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2371 | { |
83f78d1a | 2372 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2373 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2374 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2375 | STRLEN lvoff = LvTARGOFF(sv); |
2376 | STRLEN lvlen = LvTARGLEN(sv); | |
b063b0a8 DIM |
2377 | const bool negoff = LvFLAGS(sv) & LVf_NEG_OFF; |
2378 | const bool neglen = LvFLAGS(sv) & LVf_NEG_LEN; | |
7918f24d NC |
2379 | |
2380 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2381 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2382 | |
a74fb2cd FC |
2383 | SvGETMAGIC(lsv); |
2384 | if (SvROK(lsv)) | |
2385 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), | |
2386 | "Attempt to use reference as lvalue in substr" | |
2387 | ); | |
fc061ed8 FC |
2388 | SvPV_force_nomg(lsv,lsv_len); |
2389 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a FC |
2390 | if (!translate_substr_offsets( |
2391 | lsv_len, | |
2392 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2393 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
2394 | )) | |
2395 | Perl_croak(aTHX_ "substr outside of string"); | |
2396 | oldtarglen = lvlen; | |
1aa99e6b | 2397 | if (DO_UTF8(sv)) { |
73a087f0 | 2398 | sv_utf8_upgrade_nomg(lsv); |
d931b1be | 2399 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
a74fb2cd | 2400 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
7a385470 | 2401 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); |
9aa983d2 JH |
2402 | SvUTF8_on(lsv); |
2403 | } | |
0d336106 | 2404 | else if (SvUTF8(lsv)) { |
5fcbf73d | 2405 | const char *utf8; |
d931b1be | 2406 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
83f78d1a | 2407 | newtarglen = len; |
5fcbf73d | 2408 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); |
a74fb2cd | 2409 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); |
5fcbf73d | 2410 | Safefree(utf8); |
1aa99e6b | 2411 | } |
b76f3ce2 | 2412 | else { |
a74fb2cd | 2413 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
83f78d1a | 2414 | newtarglen = len; |
b76f3ce2 | 2415 | } |
83f78d1a FC |
2416 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2417 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2418 | |
79072805 LW |
2419 | return 0; |
2420 | } | |
2421 | ||
2422 | int | |
864dbfa3 | 2423 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2424 | { |
7918f24d | 2425 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2426 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2427 | #ifdef NO_TAINT_SUPPORT |
2428 | PERL_UNUSED_ARG(mg); | |
2429 | #endif | |
7918f24d | 2430 | |
64ff300b | 2431 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2432 | return 0; |
2433 | } | |
2434 | ||
2435 | int | |
864dbfa3 | 2436 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2437 | { |
7918f24d | 2438 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2439 | PERL_UNUSED_ARG(sv); |
7918f24d | 2440 | |
b01e650a | 2441 | /* update taint status */ |
284167a5 | 2442 | if (TAINT_get) |
b01e650a DM |
2443 | mg->mg_len |= 1; |
2444 | else | |
2445 | mg->mg_len &= ~1; | |
463ee0b2 LW |
2446 | return 0; |
2447 | } | |
2448 | ||
2449 | int | |
864dbfa3 | 2450 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2451 | { |
35a4481c | 2452 | SV * const lsv = LvTARG(sv); |
1b92e694 | 2453 | char errflags = LvFLAGS(sv); |
7918f24d NC |
2454 | |
2455 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2456 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2457 | |
1b92e694 | 2458 | /* non-zero errflags implies deferred out-of-range condition */ |
b063b0a8 | 2459 | assert(!(errflags & ~(LVf_NEG_OFF|LVf_OUT_OF_RANGE))); |
1b92e694 | 2460 | sv_setuv(sv, errflags ? 0 : do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2461 | |
6ff81951 GS |
2462 | return 0; |
2463 | } | |
2464 | ||
2465 | int | |
864dbfa3 | 2466 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2467 | { |
7918f24d | 2468 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2469 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2470 | do_vecset(sv); /* XXX slurp this routine */ |
2471 | return 0; | |
2472 | } | |
2473 | ||
13733cde FC |
2474 | SV * |
2475 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2476 | { |
a0714e2c | 2477 | SV *targ = NULL; |
13733cde FC |
2478 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2479 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2480 | assert(mg); | |
5f05dabc | 2481 | if (LvTARGLEN(sv)) { |
68dc0745 | 2482 | if (mg->mg_obj) { |
8772537c | 2483 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2484 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); |
6d822dc4 MS |
2485 | if (he) |
2486 | targ = HeVAL(he); | |
68dc0745 | 2487 | } |
bbfdc870 | 2488 | else if (LvSTARGOFF(sv) >= 0) { |
502c6561 | 2489 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2490 | if (LvSTARGOFF(sv) <= AvFILL(av)) |
ca58dfd9 FC |
2491 | { |
2492 | if (SvRMAGICAL(av)) { | |
2493 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2494 | targ = svp ? *svp : NULL; | |
2495 | } | |
2496 | else | |
bbfdc870 | 2497 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; |
ca58dfd9 | 2498 | } |
68dc0745 | 2499 | } |
46da273f | 2500 | if (targ && (targ != &PL_sv_undef)) { |
68dc0745 PP |
2501 | /* somebody else defined it for us */ |
2502 | SvREFCNT_dec(LvTARG(sv)); | |
b37c2d43 | 2503 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); |
68dc0745 PP |
2504 | LvTARGLEN(sv) = 0; |
2505 | SvREFCNT_dec(mg->mg_obj); | |
a0714e2c | 2506 | mg->mg_obj = NULL; |
68dc0745 PP |
2507 | mg->mg_flags &= ~MGf_REFCOUNTED; |
2508 | } | |
13733cde | 2509 | return targ; |
5f05dabc | 2510 | } |
71be2cbc | 2511 | else |
13733cde FC |
2512 | return LvTARG(sv); |
2513 | } | |
2514 | ||
2515 | int | |
2516 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2517 | { | |
2518 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2519 | ||
2520 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc PP |
2521 | return 0; |
2522 | } | |
2523 | ||
2524 | int | |
864dbfa3 | 2525 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2526 | { |
7918f24d | 2527 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2528 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2529 | if (LvTARGLEN(sv)) |
68dc0745 PP |
2530 | vivify_defelem(sv); |
2531 | if (LvTARG(sv)) { | |
5f05dabc | 2532 | sv_setsv(LvTARG(sv), sv); |
68dc0745 PP |
2533 | SvSETMAGIC(LvTARG(sv)); |
2534 | } | |
5f05dabc PP |
2535 | return 0; |
2536 | } | |
2537 | ||
71be2cbc | 2538 | void |
864dbfa3 | 2539 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2540 | { |
74e13ce4 | 2541 | MAGIC *mg; |
a0714e2c | 2542 | SV *value = NULL; |
71be2cbc | 2543 | |
7918f24d NC |
2544 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2545 | ||
14befaf4 | 2546 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
71be2cbc | 2547 | return; |
68dc0745 | 2548 | if (mg->mg_obj) { |
8772537c | 2549 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2550 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); |
6d822dc4 MS |
2551 | if (he) |
2552 | value = HeVAL(he); | |
3280af22 | 2553 | if (!value || value == &PL_sv_undef) |
be2597df | 2554 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); |
71be2cbc | 2555 | } |
bbfdc870 FC |
2556 | else if (LvSTARGOFF(sv) < 0) |
2557 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
68dc0745 | 2558 | else { |
502c6561 | 2559 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2560 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) |
a0714e2c | 2561 | LvTARG(sv) = NULL; /* array can't be extended */ |
68dc0745 | 2562 | else { |
bbfdc870 | 2563 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); |
031c6d82 | 2564 | if (!svp || !(value = *svp)) |
bbfdc870 | 2565 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 PP |
2566 | } |
2567 | } | |
b37c2d43 | 2568 | SvREFCNT_inc_simple_void(value); |
68dc0745 PP |
2569 | SvREFCNT_dec(LvTARG(sv)); |
2570 | LvTARG(sv) = value; | |
71be2cbc | 2571 | LvTARGLEN(sv) = 0; |
68dc0745 | 2572 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2573 | mg->mg_obj = NULL; |
68dc0745 | 2574 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc PP |
2575 | } |
2576 | ||
2577 | int | |
1f1dcfb5 FC |
2578 | Perl_magic_setnonelem(pTHX_ SV *sv, MAGIC *mg) |
2579 | { | |
2580 | PERL_ARGS_ASSERT_MAGIC_SETNONELEM; | |
2581 | PERL_UNUSED_ARG(mg); | |
2582 | sv_unmagic(sv, PERL_MAGIC_nonelem); | |
2583 | return 0; | |
2584 | } | |
2585 | ||
2586 | int | |
864dbfa3 | 2587 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2588 | { |
7918f24d | 2589 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2590 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2591 | return 0; | |
810b8aa5 GS |
2592 | } |
2593 | ||
2594 | int | |
864dbfa3 | 2595 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2596 | { |
7918f24d | 2597 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2598 | PERL_UNUSED_CONTEXT; |
0177730e | 2599 | PERL_UNUSED_ARG(sv); |
565764a8 | 2600 | mg->mg_len = -1; |
93a17b20 LW |
2601 | return 0; |
2602 | } | |
2603 | ||
2604 | int | |
864dbfa3 | 2605 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2606 | { |
35a4481c | 2607 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2608 | |
7918f24d NC |
2609 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2610 | ||
79072805 | 2611 | if (uf && uf->uf_set) |
24f81a43 | 2612 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2613 | return 0; |
2614 | } | |
2615 | ||
c277df42 | 2616 | int |
faf82a0b AE |
2617 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2618 | { | |
488344d2 | 2619 | const char type = mg->mg_type; |
7918f24d NC |
2620 | |
2621 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2622 | ||
a5c7cb08 DM |
2623 | assert( type == PERL_MAGIC_fm |
2624 | || type == PERL_MAGIC_qr | |
2625 | || type == PERL_MAGIC_bm); | |
488344d2 | 2626 | return sv_unmagic(sv, type); |
faf82a0b AE |
2627 | } |
2628 | ||
7a4c00b4 | 2629 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2630 | int |
864dbfa3 | 2631 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2632 | { |
7918f24d NC |
2633 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2634 | ||
bbce6d69 | 2635 | /* |
838b5b74 | 2636 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 PP |
2637 | * and vanished with a faint plop. |
2638 | */ | |
96a5add6 | 2639 | PERL_UNUSED_CONTEXT; |
8772537c | 2640 | PERL_UNUSED_ARG(sv); |
7a4c00b4 PP |
2641 | if (mg->mg_ptr) { |
2642 | Safefree(mg->mg_ptr); | |
2643 | mg->mg_ptr = NULL; | |
565764a8 | 2644 | mg->mg_len = -1; |
7a4c00b4 | 2645 | } |
bbce6d69 PP |
2646 | return 0; |
2647 | } | |
7a4c00b4 | 2648 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2649 | |
7e8c5dac HS |
2650 | /* Just clear the UTF-8 cache data. */ |
2651 | int | |
2652 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2653 | { | |
7918f24d | 2654 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2655 | PERL_UNUSED_CONTEXT; |
8772537c | 2656 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2657 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2658 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2659 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2660 | return 0; | |
2661 | } | |
2662 | ||
bbce6d69 | 2663 | int |
9cce4f9a FC |
2664 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2665 | { | |
9782ce69 | 2666 | const char *bad = NULL; |
9cce4f9a | 2667 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2668 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2669 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2670 | case OPpLVREF_SV: | |
2671 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) | |
2672 | bad = " SCALAR"; | |
2673 | break; | |
2674 | case OPpLVREF_AV: | |
2675 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) | |
2676 | bad = "n ARRAY"; | |
2677 | break; | |
2678 | case OPpLVREF_HV: | |
2679 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) | |
2680 | bad = " HASH"; | |
2681 | break; | |
2682 | case OPpLVREF_CV: | |
2683 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) | |
2684 | bad = " CODE"; | |
2685 | } | |
2686 | if (bad) | |
26a50d99 | 2687 | /* diag_listed_as: Assigned value is not %s reference */ |
9782ce69 | 2688 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); |
c146a62a FC |
2689 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2690 | case 0: | |
2691 | { | |
2692 | SV * const old = PAD_SV(mg->mg_len); | |
2693 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2694 | SvREFCNT_dec(old); | |
2695 | break; | |
2696 | } | |
2697 | case SVt_PVGV: | |
2698 | gv_setref(mg->mg_obj, sv); | |
2699 | SvSETMAGIC(mg->mg_obj); | |
6102323a FC |
2700 | break; |
2701 | case SVt_PVAV: | |
2702 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), | |
2703 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
5f94141d FC |
2704 | break; |
2705 | case SVt_PVHV: | |
7fcb36d5 JH |
2706 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
2707 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); | |
c146a62a | 2708 | } |
d39c26a6 FC |
2709 | if (mg->mg_flags & MGf_PERSIST) |
2710 | NOOP; /* This sv is in use as an iterator var and will be reused, | |
2711 | so we must leave the magic. */ | |
2712 | else | |
2713 | /* This sv could be returned by the assignment op, so clear the | |
2714 | magic, as lvrefs are an implementation detail that must not be | |
2715 | leaked to the user. */ | |
2716 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2717 | return 0; |
2718 | } | |
2719 | ||
f1540bed JH |
2720 | static void |
2721 | S_set_dollarzero(pTHX_ SV *sv) | |
2722 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2723 | { | |
2724 | #ifdef USE_ITHREADS | |
2725 | dVAR; | |
2726 | #endif | |
2727 | const char *s; | |
2728 | STRLEN len; | |
f1540bed JH |
2729 | #ifdef HAS_SETPROCTITLE |
2730 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2731 | * show a string from the process struct and provide | |
2732 | * the setproctitle() routine to manipulate that. */ | |
2733 | if (PL_origalen != 1) { | |
2734 | s = SvPV_const(sv, len); | |
38626956 | 2735 | # if __FreeBSD_version > 410001 || defined(__DragonFly__) |
f1540bed JH |
2736 | /* The leading "-" removes the "perl: " prefix, |
2737 | * but not the "(perl) suffix from the ps(1) | |
2738 | * output, because that's what ps(1) shows if the | |
2739 | * argv[] is modified. */ | |
2740 | setproctitle("-%s", s); | |
2741 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2742 | /* This doesn't really work if you assume that | |
2743 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2744 | * because in ps(1) output the result will be like | |
2745 | * sprintf("perl: %s (perl)", s) | |
2746 | * I guess this is a security feature: | |
2747 | * one (a user process) cannot get rid of the original name. | |
2748 | * --jhi */ | |
2749 | setproctitle("%s", s); | |
2750 | # endif | |
2751 | } | |
2752 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2753 | if (PL_origalen != 1) { | |
2754 | union pstun un; | |
2755 | s = SvPV_const(sv, len); | |
2756 | un.pst_command = (char *)s; | |
2757 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2758 | } | |
2759 | #else | |
2760 | if (PL_origalen > 1) { | |
4f3e04fd | 2761 | I32 i; |
f1540bed JH |
2762 | /* PL_origalen is set in perl_parse(). */ |
2763 | s = SvPV_force(sv,len); | |
2764 | if (len >= (STRLEN)PL_origalen-1) { | |
2765 | /* Longer than original, will be truncated. We assume that | |
2766 | * PL_origalen bytes are available. */ | |
2767 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2768 | } | |
2769 | else { | |
2770 | /* Shorter than original, will be padded. */ | |
2771 | #ifdef PERL_DARWIN | |
2772 | /* Special case for Mac OS X: see [perl #38868] */ | |
2773 | const int pad = 0; | |
2774 | #else | |
2775 | /* Is the space counterintuitive? Yes. | |
2776 | * (You were expecting \0?) | |
2777 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2778 | * --jhi */ | |
2779 | const int pad = ' '; | |
2780 | #endif | |
2781 | Copy(s, PL_origargv[0], len, char); | |
2782 | PL_origargv[0][len] = 0; | |
2783 | memset(PL_origargv[0] + len + 1, | |
2784 | pad, PL_origalen - len - 1); | |
2785 | } | |
2786 | PL_origargv[0][PL_origalen-1] = 0; | |
2787 | for (i = 1; i < PL_origargc; i++) | |
2788 | PL_origargv[i] = 0; | |
2789 | #ifdef HAS_PRCTL_SET_NAME | |
2790 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2791 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2792 | /* diag_listed_as: SKIPME */ | |
2793 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2794 | } | |
2795 | #endif | |
2796 | } | |
2797 | #endif | |
2798 | } | |
2799 | ||
9cce4f9a | 2800 | int |
864dbfa3 | 2801 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2802 | { |
20b7effb | 2803 | #ifdef USE_ITHREADS |
97aff369 | 2804 | dVAR; |
20b7effb | 2805 | #endif |
eb578fdb KW |
2806 | I32 paren; |
2807 | const REGEXP * rx; | |
79072805 | 2808 | I32 i; |
8990e307 | 2809 | STRLEN len; |
125b9982 | 2810 | MAGIC *tmg; |
2fdbfb4d | 2811 | |
7918f24d NC |
2812 | PERL_ARGS_ASSERT_MAGIC_SET; |
2813 | ||
e91d8259 | 2814 | if (!mg->mg_ptr) { |
960b831f | 2815 | paren = mg->mg_len; |
1e05feb3 | 2816 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2817 | setparen_got_rx: |
2fdbfb4d | 2818 | CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv); |
1e05feb3 | 2819 | } else { |
2fdbfb4d AB |
2820 | /* Croak with a READONLY error when a numbered match var is |
2821 | * set without a previous pattern match. Unless it's C<local $1> | |
2822 | */ | |
e91d8259 | 2823 | croakparen: |
2fdbfb4d | 2824 | if (!PL_localizing) { |
cb077ed2 | 2825 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2826 | } |
2827 | } | |
e91d8259 NC |
2828 | return 0; |
2829 | } | |
2830 | ||
2831 | switch (*mg->mg_ptr) { | |
748a9306 | 2832 | case '\001': /* ^A */ |
f2da823f FC |
2833 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2834 | else SvOK_off(PL_bodytarget); | |
64eff8b7 DM |
2835 | FmLINES(PL_bodytarget) = 0; |
2836 | if (SvPOK(PL_bodytarget)) { | |
2837 | char *s = SvPVX(PL_bodytarget); | |
0687887e KW |
2838 | char *e = SvEND(PL_bodytarget); |
2839 | while ( ((s = (char *) memchr(s, '\n', e - s))) ) { | |
64eff8b7 DM |
2840 | FmLINES(PL_bodytarget)++; |
2841 | s++; | |
2842 | } | |
2843 | } | |
125b9982 | 2844 | /* mg_set() has temporarily made sv non-magical */ |
284167a5 | 2845 | if (TAINTING_get) { |
125b9982 NT |
2846 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) |
2847 | SvTAINTED_on(PL_bodytarget); | |
2848 | else | |
2849 | SvTAINTED_off(PL_bodytarget); | |
2850 | } | |
748a9306 | 2851 | break; |
49460fe6 | 2852 | case '\003': /* ^C */ |
f2338a2e | 2853 | PL_minus_c = cBOOL(SvIV(sv)); |
49460fe6 NIS |
2854 | break; |
2855 | ||
79072805 | 2856 | case '\004': /* ^D */ |
b4ab917c | 2857 | #ifdef DEBUGGING |
a9e2d2bf DM |
2858 | { |
2859 | const char *s = SvPV_nolen_const(sv); | |
2860 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2861 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2862 | dump_all_perl(!DEBUG_B_TEST); | |
2863 | } | |
b4ab917c | 2864 | #else |
38ab35f8 | 2865 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2866 | #endif |
79072805 | 2867 | break; |
28f23441 | 2868 | case '\005': /* ^E */ |
d0063567 | 2869 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2870 | #ifdef VMS |
38ab35f8 | 2871 | set_vaxc_errno(SvIV(sv)); |
2abc681d | 2872 | #elif defined(WIN32) |
d0063567 | 2873 | SetLastError( SvIV(sv) ); |
2abc681d | 2874 | #elif defined(OS2) |
38ab35f8 | 2875 | os2_setsyserrno(SvIV(sv)); |
2abc681d | 2876 | #else |
d0063567 | 2877 | /* will anyone ever use this? */ |
38ab35f8 | 2878 | SETERRNO(SvIV(sv), 4); |
22fae026 | 2879 | #endif |
d0063567 | 2880 | } |
fd503f5c DIM |
2881 | else if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) |
2882 | Perl_croak(aTHX_ "${^ENCODING} is no longer supported"); | |
d0063567 | 2883 | break; |
79072805 | 2884 | case '\006': /* ^F */ |
9f601cf3 TC |
2885 | if (mg->mg_ptr[1] == '\0') { |
2886 | PL_maxsysfd = SvIV(sv); | |
2887 | } | |
79072805 | 2888 | break; |
a0d0e21e | 2889 | case '\010': /* ^H */ |
efa571ab KW |
2890 | { |
2891 | U32 save_hints = PL_hints; | |
5d382c25 | 2892 | PL_hints = SvUV(sv); |
efa571ab KW |
2893 | |
2894 | /* If wasn't UTF-8, and now is, notify the parser */ | |
2895 | if ((PL_hints & HINT_UTF8) && ! (save_hints & HINT_UTF8)) { | |
2896 | notify_parser_that_changed_to_utf8(); | |
2897 | } | |
2898 | } | |
a0d0e21e | 2899 | break; |
9d116dd7 | 2900 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
43c5f42d | 2901 | Safefree(PL_inplace); |
bd61b366 | 2902 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; |
da78da6e | 2903 | break; |
d9bad346 FC |
2904 | case '\016': /* ^N */ |
2905 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) | |
2906 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2907 | goto croakparen; | |
28f23441 | 2908 | case '\017': /* ^O */ |
ac27b0f5 | 2909 | if (*(mg->mg_ptr+1) == '\0') { |
43c5f42d | 2910 | Safefree(PL_osname); |
bd61b366 | 2911 | PL_osname = NULL; |
3511154c DM |
2912 | if (SvOK(sv)) { |
2913 | TAINT_PROPER("assigning to $^O"); | |
2e0de35c | 2914 | PL_osname = savesvpv(sv); |
3511154c | 2915 | } |
ac27b0f5 NIS |
2916 | } |
2917 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
8b850bd5 NC |
2918 | STRLEN len; |
2919 | const char *const start = SvPV(sv, len); | |
b54fc2b6 | 2920 | const char *out = (const char*)memchr(start, '\0', len); |
8b850bd5 | 2921 | SV *tmp; |
8b850bd5 NC |
2922 | |
2923 | ||
2924 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
f747ebd6 | 2925 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; |
8b850bd5 NC |
2926 | |
2927 | /* Opening for input is more common than opening for output, so | |
2928 | ensure that hints for input are sooner on linked list. */ | |
59cd0e26 | 2929 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, |
f747ebd6 Z |
2930 | SvUTF8(sv)) |
2931 | : newSVpvs_flags("", SvUTF8(sv)); | |
2932 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2933 | mg_set(tmp); | |
8b850bd5 | 2934 | |
f747ebd6 Z |
2935 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, |
2936 | SvUTF8(sv)); | |
2937 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2938 | mg_set(tmp); | |
ac27b0f5 | 2939 | } |
28f23441 | 2940 | break; |
79072805 | 2941 | case '\020': /* ^P */ |
2fdbfb4d AB |
2942 | PL_perldb = SvIV(sv); |
2943 | if (PL_perldb && !PL_DBsingle) | |
2944 | init_debugger(); | |
9b9e0be4 | 2945 | break; |
79072805 | 2946 | case '\024': /* ^T */ |
88e89b8a | 2947 | #ifdef BIG_TIME |
6b88bc9c | 2948 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 2949 | #else |
38ab35f8 | 2950 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 2951 | #endif |
79072805 | 2952 | break; |
e07ea26a NC |
2953 | case '\025': /* ^UTF8CACHE */ |
2954 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { | |
2955 | PL_utf8cache = (signed char) sv_2iv(sv); | |
2956 | } | |
2957 | break; | |
fde18df1 | 2958 | case '\027': /* ^W & $^WARNING_BITS */ |
4438c4b7 JH |
2959 | if (*(mg->mg_ptr+1) == '\0') { |
2960 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
38ab35f8 | 2961 | i = SvIV(sv); |
ac27b0f5 | 2962 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) |
0453d815 | 2963 | | (i ? G_WARN_ON : G_WARN_OFF) ; |
4438c4b7 | 2964 | } |
599cee73 | 2965 | } |
0a378802 | 2966 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { |
4438c4b7 | 2967 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { |
7e4f0450 | 2968 | if (!SvPOK(sv)) { |
1113f30d DM |
2969 | if (!specialWARN(PL_compiling.cop_warnings)) |
2970 | PerlMemShared_free(PL_compiling.cop_warnings); | |
7e4f0450 | 2971 | PL_compiling.cop_warnings = pWARN_STD; |
d775746e GS |
2972 | break; |
2973 | } | |
f4fc7782 | 2974 | { |
b5477537 | 2975 | STRLEN len, i; |
006c1a1d Z |
2976 | int not_none = 0, not_all = 0; |
2977 | const U8 * const ptr = (const U8 *)SvPV_const(sv, len) ; | |
f4fc7782 | 2978 | for (i = 0 ; i < len ; ++i) { |
006c1a1d Z |
2979 | not_none |= ptr[i]; |
2980 | not_all |= ptr[i] ^ 0x55; | |
f4fc7782 | 2981 | } |
006c1a1d | 2982 | if (!not_none) { |
4243c432 NC |
2983 | if (!specialWARN(PL_compiling.cop_warnings)) |
2984 | PerlMemShared_free(PL_compiling.cop_warnings); | |
2985 | PL_compiling.cop_warnings = pWARN_NONE; | |
006c1a1d Z |
2986 | } else if (len >= WARNsize && !not_all) { |
2987 | if (!specialWARN(PL_compiling.cop_warnings)) | |
3c3f8cd6 AB |
2988 | PerlMemShared_free(PL_compiling.cop_warnings); |
2989 | PL_compiling.cop_warnings = pWARN_ALL; | |
2990 | PL_dowarn |= G_WARN_ONCE ; | |
2991 | } | |
d3a7d8c7 | 2992 | else { |
72dc9ed5 NC |
2993 | STRLEN len; |
2994 | const char *const p = SvPV_const(sv, len); | |
2995 | ||
2996 | PL_compiling.cop_warnings | |
8ee4cf24 | 2997 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, |
72dc9ed5 NC |
2998 | p, len); |
2999 | ||
d3a7d8c7 GS |
3000 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
3001 | PL_dowarn |= G_WARN_ONCE ; | |
3002 | } | |
f4fc7782 | 3003 | |
d3a7d8c7 | 3004 | } |
4438c4b7 | 3005 | } |
971a9dd3 | 3006 | } |
8ca2a5d6 DD |
3007 | #ifdef WIN32 |
3008 | else if (strEQ(mg->mg_ptr+1, "IN32_SLOPPY_STAT")) { | |
3009 | w32_sloppystat = (bool)sv_true(sv); | |
3010 | } | |
3011 | #endif | |
79072805 LW |
3012 | break; |
3013 | case '.': | |
3280af22 NIS |
3014 | if (PL_localizing) { |
3015 | if (PL_localizing == 1) | |
7766f137 | 3016 | SAVESPTR(PL_last_in_gv); |
748a9306 | 3017 | } |
3280af22 | 3018 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) |
632db599 | 3019 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); |
79072805 LW |
3020 | break; |
3021 | case '^': | |
acbe1b9d | 3022 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3023 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3024 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3025 | break; |
3026 | case '~': | |
acbe1b9d | 3027 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 3028 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 3029 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
3030 | break; |
3031 | case '=': | |
acbe1b9d | 3032 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3033 | break; |
3034 | case '-': | |
acbe1b9d FC |
3035 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
3036 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
099be4f1 | 3037 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; |
79072805 LW |
3038 | break; |
3039 | case '%': | |
acbe1b9d | 3040 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
3041 | break; |
3042 | case '|': | |
4b65379b | 3043 | { |
099be4f1 | 3044 | IO * const io = GvIO(PL_defoutgv); |
720f287d AB |
3045 | if(!io) |
3046 | break; | |
38ab35f8 | 3047 | if ((SvIV(sv)) == 0) |
4b65379b CS |
3048 | IoFLAGS(io) &= ~IOf_FLUSH; |
3049 | else { | |
3050 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
3051 | PerlIO *ofp = IoOFP(io); | |
3052 | if (ofp) | |
3053 | (void)PerlIO_flush(ofp); | |
3054 | IoFLAGS(io) |= IOf_FLUSH; | |
3055 | } | |
3056 | } | |
79072805 LW |
3057 | } |
3058 | break; | |
79072805 | 3059 | case '/': |
1ab48e3a | 3060 | { |
1ab48e3a | 3061 | if (SvROK(sv)) { |
8d37cdf7 DIM |
3062 | SV *referent = SvRV(sv); |
3063 | const char *reftype = sv_reftype(referent, 0); | |
d239bea0 A |
3064 | /* XXX: dodgy type check: This leaves me feeling dirty, but |
3065 | * the alternative is to copy pretty much the entire | |
3066 | * sv_reftype() into this routine, or to do a full string | |
3067 | * comparison on the return of sv_reftype() both of which | |
3068 | * make me feel worse! NOTE, do not modify this comment | |
3069 | * without reviewing the corresponding comment in | |
3070 | * sv_reftype(). - Yves */ | |
1ab48e3a | 3071 | if (reftype[0] == 'S' || reftype[0] == 'L') { |
8d37cdf7 | 3072 | IV val = SvIV(referent); |
1ab48e3a | 3073 | if (val <= 0) { |
520b6fb6 DIM |
3074 | sv_setsv(sv, PL_rs); |
3075 | Perl_croak(aTHX_ "Setting $/ to a reference to %s is forbidden", | |
3076 | val < 0 ? "a negative integer" : "zero"); | |
1ab48e3a YO |
3077 | } |
3078 | } else { | |
ddce084a | 3079 | sv_setsv(sv, PL_rs); |
8d37cdf7 | 3080 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
3081 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
3082 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
3083 | } |
3084 | } | |
b3a2acfa | 3085 | SvREFCNT_dec(PL_rs); |
520b6fb6 | 3086 | PL_rs = newSVsv(sv); |
b3a2acfa | 3087 | } |
79072805 LW |
3088 | break; |
3089 | case '\\': | |
ef8d46e8 | 3090 | SvREFCNT_dec(PL_ors_sv); |
6bc2995b | 3091 | if (SvOK(sv)) { |
7889fe52 | 3092 | PL_ors_sv = newSVsv(sv); |
009c130f | 3093 | } |
e3c19b7b | 3094 | else { |
a0714e2c | 3095 | PL_ors_sv = NULL; |
e3c19b7b | 3096 | } |
79072805 | 3097 | break; |
7d69d4a6 FC |
3098 | case '[': |
3099 | if (SvIV(sv) != 0) | |
3100 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
3101 | break; | |
79072805 | 3102 | case '?': |
ff0cee69 | 3103 | #ifdef COMPLEX_STATUS |
6b88bc9c | 3104 | if (PL_localizing == 2) { |
41cb7b2b | 3105 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
3106 | PL_statusvalue = LvTARGOFF(sv); |
3107 | PL_statusvalue_vms = LvTARGLEN(sv); | |
ff0cee69 PP |
3108 | } |
3109 | else | |
3110 | #endif | |
3111 | #ifdef VMSISH_STATUS | |
3112 | if (VMSISH_STATUS) | |
fb38d079 | 3113 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); |
ff0cee69 PP |
3114 | else |
3115 | #endif | |
38ab35f8 | 3116 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
79072805 LW |
3117 | break; |
3118 | case '!': | |
93189314 JH |
3119 | { |
3120 | #ifdef VMS | |
3121 | # define PERL_VMS_BANG vaxc$errno | |
3122 | #else | |
3123 | # define PERL_VMS_BANG 0 | |
3124 | #endif | |
79c32fc2 | 3125 | #if defined(WIN32) |
c9beaf97 SH |
3126 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
3127 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
3128 | #else | |
91487cfc | 3129 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
93189314 | 3130 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); |
c9beaf97 | 3131 | #endif |
93189314 | 3132 | } |
79072805 LW |
3133 | break; |
3134 | case '<': | |
985213f2 | 3135 | { |
b469f1e0 | 3136 | /* XXX $< currently silently ignores failures */ |
dfff4baf | 3137 | const Uid_t new_uid = SvUID(sv); |
985213f2 | 3138 | PL_delaymagic_uid = new_uid; |
3280af22 NIS |
3139 | if (PL_delaymagic) { |
3140 | PL_delaymagic |= DM_RUID; | |
79072805 LW |
3141 | break; /* don't do magic till later */ |
3142 | } | |
3143 | #ifdef HAS_SETRUID | |
b469f1e0 | 3144 | PERL_UNUSED_RESULT(setruid(new_uid)); |
2abc681d | 3145 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3146 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
2abc681d | 3147 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3148 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 3149 | #else |
985213f2 | 3150 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
2abc681d | 3151 | # ifdef PERL_DARWIN |
75870ed3 | 3152 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ |
985213f2 | 3153 | if (new_uid != 0 && PerlProc_getuid() == 0) |
b469f1e0 | 3154 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
2abc681d | 3155 | # endif |
b469f1e0 | 3156 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
75870ed3 | 3157 | } else { |
cea2e8a9 | 3158 | Perl_croak(aTHX_ "setruid() not implemented"); |
a0d0e21e | 3159 | } |
79072805 | 3160 | #endif |
79072805 | 3161 | break; |
985213f2 | 3162 | } |
79072805 | 3163 | case '>': |
985213f2 | 3164 | { |
b469f1e0 | 3165 | /* XXX $> currently silently ignores failures */ |
dfff4baf | 3166 | const Uid_t new_euid = SvUID(sv); |
985213f2 | 3167 | PL_delaymagic_euid = new_euid; |
3280af22 NIS |
3168 | if (PL_delaymagic) { |
3169 | PL_delaymagic |= DM_EUID; | |
79072805 LW |
3170 | break; /* don't do magic till later */ |
3171 | } | |
3172 | #ifdef HAS_SETEUID | |
b469f1e0 | 3173 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
2abc681d | 3174 | #elif defined(HAS_SETREUID) |
b469f1e0 | 3175 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
2abc681d | 3176 | #elif defined(HAS_SETRESUID) |
b469f1e0 | 3177 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3178 | #else |
985213f2 | 3179 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
b469f1e0 | 3180 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); |
a0d0e21e | 3181 | else { |
cea2e8a9 | 3182 | Perl_croak(aTHX_ "seteuid() not implemented"); |
a0d0e21e | 3183 | } |
79072805 | 3184 | #endif |
79072805 | 3185 | break; |
985213f2 | 3186 | } |
79072805 | 3187 | case '(': |
985213f2 | 3188 | { |
b469f1e0 | 3189 | /* XXX $( currently silently ignores failures */ |
dfff4baf | 3190 | const Gid_t new_gid = SvGID(sv); |
985213f2 | 3191 | PL_delaymagic_gid = new_gid; |
3280af22 NIS |
3192 | if (PL_delaymagic) { |
3193 | PL_delaymagic |= DM_RGID; | |
79072805 LW |
3194 | break; /* don't do magic till later */ |
3195 | } | |
3196 | #ifdef HAS_SETRGID | |
b469f1e0 | 3197 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
2abc681d | 3198 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3199 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
2abc681d | 3200 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3201 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3202 | #else |
985213f2 | 3203 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
b469f1e0 | 3204 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); |
748a9306 | 3205 | else { |
cea2e8a9 | 3206 | Perl_croak(aTHX_ "setrgid() not implemented"); |
748a9306 | 3207 | } |
79072805 | 3208 | #endif |
79072805 | 3209 | break; |
985213f2 | 3210 | } |
79072805 | 3211 | case ')': |
985213f2 | 3212 | { |
0635704a HS |
3213 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3214 | * but you can override it if you need to. | |
3215 | */ | |
3216 | #ifndef INVALID_GID | |
3217 | #define INVALID_GID ((Gid_t)-1) | |
3218 | #endif | |
b469f1e0 | 3219 | /* XXX $) currently silently ignores failures */ |
dfff4baf | 3220 | Gid_t new_egid; |
5cd24f17 PP |
3221 | #ifdef HAS_SETGROUPS |
3222 | { | |
b83604b4 | 3223 | const char *p = SvPV_const(sv, len); |
757f63d8 | 3224 | Groups_t *gary = NULL; |
79e302e6 MM |
3225 | const char* p_end = p + len; |
3226 | const char* endptr = p_end; | |
22ff3130 | 3227 | UV uv; |
fb4089e0 | 3228 | #ifdef _SC_NGROUPS_MAX |
3229 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3230 | ||
3231 | if (maxgrp < 0) | |
3232 | maxgrp = NGROUPS; | |
3233 | #else | |
3234 | int maxgrp = NGROUPS; | |
3235 | #endif | |
757f63d8 SP |
3236 | |
3237 | while (isSPACE(*p)) | |
3238 | ++p; | |
22ff3130 HS |
3239 | if (grok_atoUV(p, &uv, &endptr)) |
3240 | new_egid = (Gid_t)uv; | |
3241 | else { | |
0635704a | 3242 | new_egid = INVALID_GID; |
22ff3130 HS |
3243 | endptr = NULL; |
3244 | } | |
fb4089e0 | 3245 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3246 | if (endptr == NULL) |
3247 | break; | |
3248 | p = endptr; | |
79e302e6 | 3249 | endptr = p_end; |
757f63d8 SP |
3250 | while (isSPACE(*p)) |
3251 | ++p; | |
3252 | if (!*p) | |
3253 | break; | |
fdadaf77 | 3254 | if (!gary) |
757f63d8 SP |
3255 | Newx(gary, i + 1, Groups_t); |
3256 | else | |
3257 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3258 | if (grok_atoUV(p, &uv, &endptr)) |
3259 | gary[i] = (Groups_t)uv; | |
3260 | else { | |
0635704a | 3261 | gary[i] = INVALID_GID; |
22ff3130 HS |
3262 | endptr = NULL; |
3263 | } | |
757f63d8 SP |
3264 | } |
3265 | if (i) | |
b469f1e0 | 3266 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
f5a63d97 | 3267 | Safefree(gary); |
5cd24f17 PP |
3268 | } |
3269 | #else /* HAS_SETGROUPS */ | |
dfff4baf | 3270 | new_egid = SvGID(sv); |
5cd24f17 | 3271 | #endif /* HAS_SETGROUPS */ |
985213f2 | 3272 | PL_delaymagic_egid = new_egid; |
3280af22 NIS |
3273 | if (PL_delaymagic) { |
3274 | PL_delaymagic |= DM_EGID; | |
79072805 LW |
3275 | break; /* don't do magic till later */ |
3276 | } | |
3277 | #ifdef HAS_SETEGID | |
b469f1e0 | 3278 | PERL_UNUSED_RESULT(setegid(new_egid)); |
2abc681d | 3279 | #elif defined(HAS_SETREGID) |
b469f1e0 | 3280 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
2abc681d | 3281 | #elif defined(HAS_SETRESGID) |
b469f1e0 | 3282 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3283 | #else |
985213f2 | 3284 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
b469f1e0 | 3285 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); |
748a9306 | 3286 | else { |
cea2e8a9 | 3287 | Perl_croak(aTHX_ "setegid() not implemented"); |
748a9306 | 3288 | } |
79072805 | 3289 | #endif |
79072805 | 3290 | break; |
985213f2 | 3291 | } |
79072805 | 3292 | case ':': |
2d8e6c8d | 3293 | PL_chopset = SvPV_force(sv,len); |
79072805 | 3294 | break; |
9cdac2a2 FC |
3295 | case '$': /* $$ */ |
3296 | /* Store the pid in mg->mg_obj so we can tell when a fork has | |
3297 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3298 | if (isGV(mg->mg_obj)) { | |
3299 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3300 | SvREFCNT_dec(mg->mg_obj); | |
3301 | mg->mg_flags |= MGf_REFCOUNTED; | |
3302 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3303 | } | |
3304 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3305 | break; | |
79072805 | 3306 | case '0': |
e2975953 | 3307 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3308 | S_set_dollarzero(aTHX_ sv); |
e2975953 | 3309 | UNLOCK_DOLLARZERO_MUTEX; |
79072805 LW |
3310 | break; |
3311 | } | |
3312 | return 0; | |
3313 | } | |
3314 | ||
3315 | I32 | |
84c7b88c BF |
3316 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3317 | { | |
3318 | const char *sigpv; | |
3319 | STRLEN siglen; | |
3320 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3321 | sigpv = SvPV_const(sigsv, siglen); |
3322 | return whichsig_pvn(sigpv, siglen); | |
3323 | } | |
3324 | ||
3325 | I32 | |
3326 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3327 | { | |
3328 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3329 | return whichsig_pvn(sig, strlen(sig)); |
3330 | } | |
3331 | ||
3332 | I32 | |
3333 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3334 | { |
eb578fdb | 3335 | char* const* sigv; |
7918f24d | 3336 | |
84c7b88c | 3337 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3338 | PERL_UNUSED_CONTEXT; |
79072805 | 3339 | |
aadb217d | 3340 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
84c7b88c | 3341 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
aadb217d | 3342 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; |
79072805 | 3343 | #ifdef SIGCLD |
84c7b88c | 3344 | if (memEQs(sig, len, "CHLD")) |
79072805 LW |
3345 | return SIGCLD; |
3346 | #endif | |
3347 | #ifdef SIGCHLD | |
84c7b88c | 3348 | if (memEQs(sig, len, "CLD")) |
79072805 LW |
3349 | return SIGCHLD; |
3350 | #endif | |
7f1236c0 | 3351 | return -1; |
79072805 LW |
3352 | } |
3353 | ||
dc37125b DM |
3354 | |
3355 | /* Perl_sighandler(), Perl_sighandler1(), Perl_sighandler3(): | |
3356 | * these three function are intended to be called by the OS as 'C' level | |
3357 | * signal handler functions in the case where unsafe signals are being | |
3358 | * used - i.e. they immediately invoke Perl_perly_sighandler() to call the | |
3359 | * perl-level sighandler, rather than deferring. | |
3360 | * In fact, the core itself will normally use Perl_csighandler as the | |
3361 | * OS-level handler; that function will then decide whether to queue the | |
3362 | * signal or call Perl_sighandler / Perl_perly_sighandler itself. So these | |
3363 | * functions are more useful for e.g. POSIX.xs when it wants explicit | |
3364 | * control of what's happening. | |
3365 | */ | |
3366 | ||
3367 | ||
5e7940ce | 3368 | #ifdef PERL_USE_3ARG_SIGHANDLER |
8a5e470b DM |
3369 | |
3370 | Signal_t | |
e7124897 | 3371 | Perl_sighandler(int sig, Siginfo_t *sip, void *uap) |
8a5e470b DM |
3372 | { |
3373 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3374 | } | |
3375 | ||
1e82f5a6 | 3376 | #else |
8a5e470b DM |
3377 | |
3378 | Signal_t | |
1e82f5a6 | 3379 | Perl_sighandler(int sig) |
8a5e470b DM |
3380 | { |
3381 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3382 | } | |
3383 | ||
1e82f5a6 | 3384 | #endif |
8a5e470b | 3385 | |
dc37125b DM |
3386 | Signal_t |
3387 | Perl_sighandler1(int sig) | |
3388 | { | |
3389 | Perl_perly_sighandler(sig, NULL, NULL, 0); | |
3390 | } | |
3391 | ||
3392 | Signal_t | |
3393 | Perl_sighandler3(int sig, Siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) | |
3394 | { | |
3395 | Perl_perly_sighandler(sig, sip, uap, 0); | |
3396 | } | |
3397 | ||
3398 | ||
8a5e470b DM |
3399 | /* Invoke the perl-level signal handler. This function is called either |
3400 | * directly from one of the C-level signals handlers (Perl_sighandler or | |
3401 | * Perl_csighandler), or for safe signals, later from | |
3402 | * Perl_despatch_signals() at a suitable safe point during execution. | |
3403 | * | |
3404 | * 'safe' is a boolean indicating the latter call path. | |
3405 | */ | |
3406 | ||
3407 | Signal_t | |
3408 | Perl_perly_sighandler(int sig, Siginfo_t *sip PERL_UNUSED_DECL, | |
3409 | void *uap PERL_UNUSED_DECL, bool safe) | |
79072805 | 3410 | { |
1018e26f NIS |
3411 | #ifdef PERL_GET_SIG_CONTEXT |
3412 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3413 | #else |
cea2e8a9 | 3414 | dTHX; |
71d280e3 | 3415 | #endif |
79072805 | 3416 | dSP; |
a0714e2c SS |
3417 | GV *gv = NULL; |
3418 | SV *sv = NULL; | |
8772537c | 3419 | SV * const tSv = PL_Sv; |
601f1833 | 3420 | CV *cv = NULL; |
533c011a | 3421 | OP *myop = PL_op; |
84902520 | 3422 | U32 flags = 0; |
8772537c | 3423 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3424 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3425 | SV *errsv_save = NULL; |
71d280e3 | 3426 | |
84902520 | 3427 | |
727405f8 | 3428 | if (!PL_psig_ptr[sig]) { |
99ef548b | 3429 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
727405f8 NIS |
3430 | PL_sig_name[sig]); |
3431 | exit(sig); | |
3432 | } | |
ff0cee69 | 3433 | |
a0d63a7b DM |
3434 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3435 | /* Max number of items pushed there is 3*n or 4. We cannot fix | |
3436 | infinity, so we fix 4 (in fact 5): */ | |
3437 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3438 | flags |= 1; | |
3439 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3440 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3441 | } | |
84902520 | 3442 | } |
84902520 | 3443 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3444 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
8772537c AL |
3445 | || SvTYPE(cv) != SVt_PVCV) { |
3446 | HV *st; | |
f2c0649b | 3447 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); |
8772537c | 3448 | } |
84902520 | 3449 | |
a0d0e21e | 3450 | if (!cv || !CvROOT(cv)) { |
07c325bb | 3451 | const HEK * const hek = gv |
1d6bb9ae FC |
3452 | ? GvENAME_HEK(gv) |
3453 | : cv && CvNAMED(cv) | |
3454 | ? CvNAME_HEK(cv) | |
07c325bb FC |
3455 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; |
3456 | if (hek) | |
3457 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
147e3846 | 3458 | "SIG%s handler \"%" HEKf "\" not defined.\n", |
ac892e4a | 3459 | PL_sig_name[sig], HEKfARG(hek)); |
07c325bb FC |
3460 | /* diag_listed_as: SIG%s handler "%s" not defined */ |
3461 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3462 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3463 | PL_sig_name[sig]); | |
00d579c5 | 3464 | goto cleanup; |
79072805 LW |
3465 | } |
3466 | ||
0c4d3b5e DM |
3467 | sv = PL_psig_name[sig] |
3468 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) | |
3469 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3470 | flags |= 8; |
0c4d3b5e DM |
3471 | SAVEFREESV(sv); |
3472 | ||
a0d63a7b DM |
3473 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3474 | /* make sure our assumption about the size of the SAVEs are correct: | |
3475 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3476 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
3477 | } | |