Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* mg.c |
79072805 | 2 | * |
1129b882 NC |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others | |
79072805 LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
a0d0e21e LW |
9 | */ |
10 | ||
11 | /* | |
4ac71550 TC |
12 | * Sam sat on the ground and put his head in his hands. 'I wish I had never |
13 | * come here, and I don't want to see no more magic,' he said, and fell silent. | |
14 | * | |
15 | * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"] | |
79072805 LW |
16 | */ |
17 | ||
ccfc67b7 JH |
18 | /* |
19 | =head1 Magical Functions | |
166f8a29 DM |
20 | "Magic" is special data attached to SV structures in order to give them |
21 | "magical" properties. When any Perl code tries to read from, or assign to, | |
22 | an SV marked as magical, it calls the 'get' or 'set' function associated | |
154e47c8 | 23 | with that SV's magic. A get is called prior to reading an SV, in order to |
ddfa107c | 24 | give it a chance to update its internal value (get on $. writes the line |
b53c43bf | 25 | number of the last read filehandle into the SV's IV slot), while |
166f8a29 | 26 | set is called after an SV has been written to, in order to allow it to make |
ddfa107c | 27 | use of its changed value (set on $/ copies the SV's new value to the |
166f8a29 DM |
28 | PL_rs global variable). |
29 | ||
30 | Magic is implemented as a linked list of MAGIC structures attached to the | |
154e47c8 | 31 | SV. Each MAGIC struct holds the type of the magic, a pointer to an array |
166f8a29 | 32 | of functions that implement the get(), set(), length() etc functions, |
154e47c8 | 33 | plus space for some flags and pointers. For example, a tied variable has |
166f8a29 DM |
34 | a MAGIC structure that contains a pointer to the object associated with the |
35 | tie. | |
36 | ||
7fefc6c1 KW |
37 | =cut |
38 | ||
ccfc67b7 JH |
39 | */ |
40 | ||
79072805 | 41 | #include "EXTERN.h" |
864dbfa3 | 42 | #define PERL_IN_MG_C |
79072805 LW |
43 | #include "perl.h" |
44 | ||
5cd24f17 | 45 | #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS) |
b7953727 JH |
46 | # ifdef I_GRP |
47 | # include <grp.h> | |
48 | # endif | |
188ea221 CS |
49 | #endif |
50 | ||
757f63d8 SP |
51 | #if defined(HAS_SETGROUPS) |
52 | # ifndef NGROUPS | |
53 | # define NGROUPS 32 | |
54 | # endif | |
55 | #endif | |
56 | ||
17aa7f3d JH |
57 | #ifdef __hpux |
58 | # include <sys/pstat.h> | |
59 | #endif | |
60 | ||
7636ea95 AB |
61 | #ifdef HAS_PRCTL_SET_NAME |
62 | # include <sys/prctl.h> | |
63 | #endif | |
64 | ||
8aad04aa | 65 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
b6455c53 | 66 | Signal_t Perl_csighandler(int sig, siginfo_t *, void *); |
8aad04aa | 67 | #else |
e69880a5 | 68 | Signal_t Perl_csighandler(int sig); |
8aad04aa | 69 | #endif |
e69880a5 | 70 | |
9cffb111 OS |
71 | #ifdef __Lynx__ |
72 | /* Missing protos on LynxOS */ | |
73 | void setruid(uid_t id); | |
74 | void seteuid(uid_t id); | |
75 | void setrgid(uid_t id); | |
76 | void setegid(uid_t id); | |
77 | #endif | |
78 | ||
c07a80fd | 79 | /* |
4bac9ae4 | 80 | * Pre-magic setup and post-magic takedown. |
c07a80fd PP |
81 | * Use the "DESTRUCTOR" scope cleanup to reinstate magic. |
82 | */ | |
83 | ||
84 | struct magic_state { | |
85 | SV* mgs_sv; | |
455ece5e | 86 | I32 mgs_ss_ix; |
a623f893 | 87 | U32 mgs_flags; |
150b625d | 88 | bool mgs_bumped; |
c07a80fd | 89 | }; |
455ece5e | 90 | /* MGS is typedef'ed to struct magic_state in perl.h */ |
76e3520e GS |
91 | |
92 | STATIC void | |
ff44333e | 93 | S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags) |
c07a80fd | 94 | { |
455ece5e | 95 | MGS* mgs; |
150b625d | 96 | bool bumped = FALSE; |
7918f24d | 97 | |
ff44333e | 98 | PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS; |
7918f24d | 99 | |
4bac9ae4 CS |
100 | assert(SvMAGICAL(sv)); |
101 | ||
150b625d DM |
102 | /* we shouldn't really be called here with RC==0, but it can sometimes |
103 | * happen via mg_clear() (which also shouldn't be called when RC==0, | |
104 | * but it can happen). Handle this case gracefully(ish) by not RC++ | |
105 | * and thus avoiding the resultant double free */ | |
106 | if (SvREFCNT(sv) > 0) { | |
107 | /* guard against sv getting freed midway through the mg clearing, | |
108 | * by holding a private reference for the duration. */ | |
109 | SvREFCNT_inc_simple_void_NN(sv); | |
110 | bumped = TRUE; | |
111 | } | |
8985fe98 | 112 | |
8772537c | 113 | SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix)); |
455ece5e AD |
114 | |
115 | mgs = SSPTR(mgs_ix, MGS*); | |
c07a80fd | 116 | mgs->mgs_sv = sv; |
a623f893 | 117 | mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv); |
455ece5e | 118 | mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */ |
150b625d | 119 | mgs->mgs_bumped = bumped; |
c07a80fd | 120 | |
ff44333e | 121 | SvFLAGS(sv) &= ~flags; |
3805b5fb | 122 | SvREADONLY_off(sv); |
c07a80fd PP |
123 | } |
124 | ||
ff44333e FC |
125 | #define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG) |
126 | ||
954c1994 GS |
127 | /* |
128 | =for apidoc mg_magical | |
129 | ||
fbe13c60 | 130 | Turns on the magical status of an SV. See C<L</sv_magic>>. |
954c1994 GS |
131 | |
132 | =cut | |
133 | */ | |
134 | ||
8990e307 | 135 | void |
ddeaf645 | 136 | Perl_mg_magical(SV *sv) |
8990e307 | 137 | { |
e1ec3a88 | 138 | const MAGIC* mg; |
7918f24d | 139 | PERL_ARGS_ASSERT_MG_MAGICAL; |
f9c6fee5 CS |
140 | |
141 | SvMAGICAL_off(sv); | |
218787bd | 142 | if ((mg = SvMAGIC(sv))) { |
218787bd VP |
143 | do { |
144 | const MGVTBL* const vtbl = mg->mg_virtual; | |
145 | if (vtbl) { | |
146 | if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP)) | |
147 | SvGMAGICAL_on(sv); | |
148 | if (vtbl->svt_set) | |
149 | SvSMAGICAL_on(sv); | |
150 | if (vtbl->svt_clear) | |
151 | SvRMAGICAL_on(sv); | |
152 | } | |
153 | } while ((mg = mg->mg_moremagic)); | |
154 | if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG))) | |
155 | SvRMAGICAL_on(sv); | |
8990e307 LW |
156 | } |
157 | } | |
158 | ||
954c1994 GS |
159 | /* |
160 | =for apidoc mg_get | |
161 | ||
4b1e7f06 | 162 | Do magic before a value is retrieved from the SV. The type of SV must |
796b6530 | 163 | be >= C<SVt_PVMG>. See C<L</sv_magic>>. |
954c1994 GS |
164 | |
165 | =cut | |
166 | */ | |
167 | ||
79072805 | 168 | int |
864dbfa3 | 169 | Perl_mg_get(pTHX_ SV *sv) |
79072805 | 170 | { |
35a4481c | 171 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
a9844598 | 172 | bool saved = FALSE; |
f9c6fee5 | 173 | bool have_new = 0; |
ff76feab | 174 | MAGIC *newmg, *head, *cur, *mg; |
6683b158 | 175 | |
7918f24d NC |
176 | PERL_ARGS_ASSERT_MG_GET; |
177 | ||
407287f9 FC |
178 | if (PL_localizing == 1 && sv == DEFSV) return 0; |
179 | ||
ff76feab AMS |
180 | /* We must call svt_get(sv, mg) for each valid entry in the linked |
181 | list of magic. svt_get() may delete the current entry, add new | |
182 | magic to the head of the list, or upgrade the SV. AMS 20010810 */ | |
183 | ||
184 | newmg = cur = head = mg = SvMAGIC(sv); | |
185 | while (mg) { | |
35a4481c | 186 | const MGVTBL * const vtbl = mg->mg_virtual; |
f9c6fee5 | 187 | MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */ |
ff76feab | 188 | |
2b260de0 | 189 | if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) { |
a9844598 CS |
190 | |
191 | /* taint's mg get is so dumb it doesn't need flag saving */ | |
192 | if (!saved && mg->mg_type != PERL_MAGIC_taint) { | |
193 | save_magic(mgs_ix, sv); | |
194 | saved = TRUE; | |
195 | } | |
196 | ||
16c91539 | 197 | vtbl->svt_get(aTHX_ sv, mg); |
b77f7d40 | 198 | |
58f82c5c DM |
199 | /* guard against magic having been deleted - eg FETCH calling |
200 | * untie */ | |
f9c6fee5 | 201 | if (!SvMAGIC(sv)) { |
a623f893 FC |
202 | /* recalculate flags */ |
203 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
58f82c5c | 204 | break; |
f9c6fee5 | 205 | } |
b77f7d40 | 206 | |
f9c6fee5 | 207 | /* recalculate flags if this entry was deleted. */ |
ff76feab | 208 | if (mg->mg_flags & MGf_GSKIP) |
a623f893 FC |
209 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= |
210 | ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
a0d0e21e | 211 | } |
7d1328bb FC |
212 | else if (vtbl == &PL_vtbl_utf8) { |
213 | /* get-magic can reallocate the PV */ | |
214 | magic_setutf8(sv, mg); | |
215 | } | |
ff76feab | 216 | |
f9c6fee5 | 217 | mg = nextmg; |
ff76feab | 218 | |
0723351e | 219 | if (have_new) { |
ff76feab AMS |
220 | /* Have we finished with the new entries we saw? Start again |
221 | where we left off (unless there are more new entries). */ | |
222 | if (mg == head) { | |
0723351e | 223 | have_new = 0; |
ff76feab AMS |
224 | mg = cur; |
225 | head = newmg; | |
226 | } | |
227 | } | |
228 | ||
229 | /* Were any new entries added? */ | |
0723351e NC |
230 | if (!have_new && (newmg = SvMAGIC(sv)) != head) { |
231 | have_new = 1; | |
ff76feab AMS |
232 | cur = mg; |
233 | mg = newmg; | |
a623f893 FC |
234 | /* recalculate flags */ |
235 | (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); | |
760ac839 | 236 | } |
79072805 | 237 | } |
463ee0b2 | 238 | |
a9844598 CS |
239 | if (saved) |
240 | restore_magic(INT2PTR(void *, (IV)mgs_ix)); | |
241 | ||
79072805 LW |
242 | return 0; |
243 | } | |
244 | ||
954c1994 GS |
245 | /* |
246 | =for apidoc mg_set | |
247 | ||
fbe13c60 | 248 | Do magic after a value is assigned to the SV. See C<L</sv_magic>>. |
954c1994 GS |
249 | |
250 | =cut | |
251 | */ | |
252 | ||
79072805 | 253 | int |
864dbfa3 | 254 | Perl_mg_set(pTHX_ SV *sv) |
79072805 | 255 | { |
35a4481c | 256 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 257 | MAGIC* mg; |
463ee0b2 LW |
258 | MAGIC* nextmg; |
259 | ||
7918f24d NC |
260 | PERL_ARGS_ASSERT_MG_SET; |
261 | ||
b5ed8c44 FC |
262 | if (PL_localizing == 2 && sv == DEFSV) return 0; |
263 | ||
ff44333e | 264 | save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */ |
463ee0b2 LW |
265 | |
266 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { | |
e1ec3a88 | 267 | const MGVTBL* vtbl = mg->mg_virtual; |
463ee0b2 | 268 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
a0d0e21e LW |
269 | if (mg->mg_flags & MGf_GSKIP) { |
270 | mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */ | |
a623f893 | 271 | (SSPTR(mgs_ix, MGS*))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG); |
a0d0e21e | 272 | } |
e0a73de4 | 273 | if (PL_localizing == 2 |
b5ed8c44 | 274 | && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
e7cbf6c6 | 275 | continue; |
2b260de0 | 276 | if (vtbl && vtbl->svt_set) |
16c91539 | 277 | vtbl->svt_set(aTHX_ sv, mg); |
79072805 | 278 | } |
463ee0b2 | 279 | |
8772537c | 280 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
281 | return 0; |
282 | } | |
283 | ||
954c1994 GS |
284 | /* |
285 | =for apidoc mg_length | |
286 | ||
d4e99c76 | 287 | Reports on the SV's length in bytes, calling length magic if available, |
796b6530 | 288 | but does not set the UTF8 flag on C<sv>. It will fall back to 'get' |
bd8446cf | 289 | magic if there is no 'length' magic, but with no indication as to |
796b6530 KW |
290 | whether it called 'get' magic. It assumes C<sv> is a C<PVMG> or |
291 | higher. Use C<sv_len()> instead. | |
954c1994 GS |
292 | |
293 | =cut | |
294 | */ | |
295 | ||
79072805 | 296 | U32 |
864dbfa3 | 297 | Perl_mg_length(pTHX_ SV *sv) |
79072805 LW |
298 | { |
299 | MAGIC* mg; | |
463ee0b2 | 300 | STRLEN len; |
463ee0b2 | 301 | |
7918f24d NC |
302 | PERL_ARGS_ASSERT_MG_LENGTH; |
303 | ||
79072805 | 304 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 305 | const MGVTBL * const vtbl = mg->mg_virtual; |
2b260de0 | 306 | if (vtbl && vtbl->svt_len) { |
35a4481c | 307 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
455ece5e | 308 | save_magic(mgs_ix, sv); |
a0d0e21e | 309 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 310 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 311 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
85e6fe83 LW |
312 | return len; |
313 | } | |
314 | } | |
315 | ||
bd8446cf | 316 | (void)SvPV_const(sv, len); |
463ee0b2 | 317 | return len; |
79072805 LW |
318 | } |
319 | ||
8fb26106 | 320 | I32 |
864dbfa3 | 321 | Perl_mg_size(pTHX_ SV *sv) |
93965878 NIS |
322 | { |
323 | MAGIC* mg; | |
ac27b0f5 | 324 | |
7918f24d NC |
325 | PERL_ARGS_ASSERT_MG_SIZE; |
326 | ||
93965878 | 327 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 328 | const MGVTBL* const vtbl = mg->mg_virtual; |
2b260de0 | 329 | if (vtbl && vtbl->svt_len) { |
35a4481c AL |
330 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
331 | I32 len; | |
455ece5e | 332 | save_magic(mgs_ix, sv); |
93965878 | 333 | /* omit MGf_GSKIP -- not changed here */ |
16c91539 | 334 | len = vtbl->svt_len(aTHX_ sv, mg); |
8772537c | 335 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
93965878 NIS |
336 | return len; |
337 | } | |
338 | } | |
339 | ||
340 | switch(SvTYPE(sv)) { | |
341 | case SVt_PVAV: | |
502c6561 | 342 | return AvFILLp((const AV *) sv); /* Fallback to non-tied array */ |
93965878 NIS |
343 | case SVt_PVHV: |
344 | /* FIXME */ | |
345 | default: | |
cea2e8a9 | 346 | Perl_croak(aTHX_ "Size magic not implemented"); |
81d52ecd | 347 | |
93965878 | 348 | } |
a25b5927 | 349 | NOT_REACHED; /* NOTREACHED */ |
93965878 NIS |
350 | } |
351 | ||
954c1994 GS |
352 | /* |
353 | =for apidoc mg_clear | |
354 | ||
fbe13c60 | 355 | Clear something magical that the SV represents. See C<L</sv_magic>>. |
954c1994 GS |
356 | |
357 | =cut | |
358 | */ | |
359 | ||
79072805 | 360 | int |
864dbfa3 | 361 | Perl_mg_clear(pTHX_ SV *sv) |
79072805 | 362 | { |
35a4481c | 363 | const I32 mgs_ix = SSNEW(sizeof(MGS)); |
79072805 | 364 | MAGIC* mg; |
8ac77ac9 | 365 | MAGIC *nextmg; |
463ee0b2 | 366 | |
7918f24d NC |
367 | PERL_ARGS_ASSERT_MG_CLEAR; |
368 | ||
455ece5e | 369 | save_magic(mgs_ix, sv); |
463ee0b2 | 370 | |
8ac77ac9 | 371 | for (mg = SvMAGIC(sv); mg; mg = nextmg) { |
35a4481c | 372 | const MGVTBL* const vtbl = mg->mg_virtual; |
a0d0e21e | 373 | /* omit GSKIP -- never set here */ |
727405f8 | 374 | |
8ac77ac9 NC |
375 | nextmg = mg->mg_moremagic; /* it may delete itself */ |
376 | ||
2b260de0 | 377 | if (vtbl && vtbl->svt_clear) |
16c91539 | 378 | vtbl->svt_clear(aTHX_ sv, mg); |
79072805 | 379 | } |
463ee0b2 | 380 | |
8772537c | 381 | restore_magic(INT2PTR(void*, (IV)mgs_ix)); |
79072805 LW |
382 | return 0; |
383 | } | |
384 | ||
ed624ca8 | 385 | static MAGIC* |
ddeaf645 | 386 | S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags) |
39de7f53 | 387 | { |
39de7f53 FR |
388 | assert(flags <= 1); |
389 | ||
390 | if (sv) { | |
391 | MAGIC *mg; | |
392 | ||
393 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
394 | if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) { | |
395 | return mg; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | return NULL; | |
401 | } | |
402 | ||
954c1994 GS |
403 | /* |
404 | =for apidoc mg_find | |
405 | ||
796b6530 | 406 | Finds the magic pointer for C<type> matching the SV. See C<L</sv_magic>>. |
954c1994 GS |
407 | |
408 | =cut | |
409 | */ | |
410 | ||
93a17b20 | 411 | MAGIC* |
ddeaf645 | 412 | Perl_mg_find(const SV *sv, int type) |
93a17b20 | 413 | { |
ddeaf645 | 414 | return S_mg_findext_flags(sv, type, NULL, 0); |
39de7f53 FR |
415 | } |
416 | ||
417 | /* | |
418 | =for apidoc mg_findext | |
419 | ||
420 | Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See | |
fbe13c60 | 421 | C<L</sv_magicext>>. |
39de7f53 FR |
422 | |
423 | =cut | |
424 | */ | |
425 | ||
426 | MAGIC* | |
ddeaf645 | 427 | Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl) |
39de7f53 | 428 | { |
ddeaf645 | 429 | return S_mg_findext_flags(sv, type, vtbl, 1); |
93a17b20 LW |
430 | } |
431 | ||
96c2a8ff FC |
432 | MAGIC * |
433 | Perl_mg_find_mglob(pTHX_ SV *sv) | |
434 | { | |
435 | PERL_ARGS_ASSERT_MG_FIND_MGLOB; | |
436 | if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') { | |
437 | /* This sv is only a delegate. //g magic must be attached to | |
438 | its target. */ | |
439 | vivify_defelem(sv); | |
440 | sv = LvTARG(sv); | |
441 | } | |
442 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) | |
ddeaf645 | 443 | return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0); |
96c2a8ff FC |
444 | return NULL; |
445 | } | |
446 | ||
954c1994 GS |
447 | /* |
448 | =for apidoc mg_copy | |
449 | ||
fbe13c60 | 450 | Copies the magic from one SV to another. See C<L</sv_magic>>. |
954c1994 GS |
451 | |
452 | =cut | |
453 | */ | |
454 | ||
79072805 | 455 | int |
864dbfa3 | 456 | Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen) |
79072805 | 457 | { |
463ee0b2 | 458 | int count = 0; |
79072805 | 459 | MAGIC* mg; |
7918f24d NC |
460 | |
461 | PERL_ARGS_ASSERT_MG_COPY; | |
462 | ||
463ee0b2 | 463 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
35a4481c | 464 | const MGVTBL* const vtbl = mg->mg_virtual; |
68795e93 | 465 | if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){ |
16c91539 | 466 | count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen); |
68795e93 | 467 | } |
823a54a3 AL |
468 | else { |
469 | const char type = mg->mg_type; | |
1e73acc8 | 470 | if (isUPPER(type) && type != PERL_MAGIC_uvar) { |
823a54a3 AL |
471 | sv_magic(nsv, |
472 | (type == PERL_MAGIC_tied) | |
473 | ? SvTIED_obj(sv, mg) | |
27deb0cf | 474 | : mg->mg_obj, |
823a54a3 AL |
475 | toLOWER(type), key, klen); |
476 | count++; | |
477 | } | |
79072805 | 478 | } |
79072805 | 479 | } |
463ee0b2 | 480 | return count; |
79072805 LW |
481 | } |
482 | ||
954c1994 | 483 | /* |
0cbee0a4 DM |
484 | =for apidoc mg_localize |
485 | ||
9711599e | 486 | Copy some of the magic from an existing SV to new localized version of that |
dfcfced8 KW |
487 | SV. Container magic (I<e.g.>, C<%ENV>, C<$1>, C<tie>) |
488 | gets copied, value magic doesn't (I<e.g.>, | |
796b6530 | 489 | C<taint>, C<pos>). |
9711599e | 490 | |
796b6530 | 491 | If C<setmagic> is false then no set magic will be called on the new (empty) SV. |
61b16eb9 | 492 | This typically means that assignment will soon follow (e.g. S<C<'local $x = $y'>>), |
9711599e | 493 | and that will handle the magic. |
0cbee0a4 DM |
494 | |
495 | =cut | |
496 | */ | |
497 | ||
498 | void | |
af7df257 | 499 | Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic) |
0cbee0a4 DM |
500 | { |
501 | MAGIC *mg; | |
7918f24d NC |
502 | |
503 | PERL_ARGS_ASSERT_MG_LOCALIZE; | |
504 | ||
658a9f31 JD |
505 | if (nsv == DEFSV) |
506 | return; | |
507 | ||
0cbee0a4 | 508 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { |
2b1b43ea | 509 | const MGVTBL* const vtbl = mg->mg_virtual; |
e0a73de4 | 510 | if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)) |
0cbee0a4 | 511 | continue; |
0cbee0a4 | 512 | |
a5063e7c | 513 | if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local) |
16c91539 | 514 | (void)vtbl->svt_local(aTHX_ nsv, mg); |
a5063e7c | 515 | else |
0cbee0a4 DM |
516 | sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl, |
517 | mg->mg_ptr, mg->mg_len); | |
a5063e7c | 518 | |
0cbee0a4 | 519 | /* container types should remain read-only across localization */ |
9ff3e6d8 | 520 | SvFLAGS(nsv) |= SvREADONLY(sv); |
0cbee0a4 DM |
521 | } |
522 | ||
523 | if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) { | |
524 | SvFLAGS(nsv) |= SvMAGICAL(sv); | |
af7df257 | 525 | if (setmagic) { |
9711599e CS |
526 | PL_localizing = 1; |
527 | SvSETMAGIC(nsv); | |
528 | PL_localizing = 0; | |
529 | } | |
0cbee0a4 DM |
530 | } |
531 | } | |
532 | ||
d9088386 Z |
533 | #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg) |
534 | static void | |
535 | S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg) | |
536 | { | |
537 | const MGVTBL* const vtbl = mg->mg_virtual; | |
538 | if (vtbl && vtbl->svt_free) | |
539 | vtbl->svt_free(aTHX_ sv, mg); | |
540 | if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) { | |
541 | if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8) | |
542 | Safefree(mg->mg_ptr); | |
543 | else if (mg->mg_len == HEf_SVKEY) | |
544 | SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr)); | |
545 | } | |
546 | if (mg->mg_flags & MGf_REFCOUNTED) | |
547 | SvREFCNT_dec(mg->mg_obj); | |
548 | Safefree(mg); | |
549 | } | |
550 | ||
0cbee0a4 | 551 | /* |
954c1994 GS |
552 | =for apidoc mg_free |
553 | ||
fbe13c60 | 554 | Free any magic storage used by the SV. See C<L</sv_magic>>. |
954c1994 GS |
555 | |
556 | =cut | |
557 | */ | |
558 | ||
79072805 | 559 | int |
864dbfa3 | 560 | Perl_mg_free(pTHX_ SV *sv) |
79072805 LW |
561 | { |
562 | MAGIC* mg; | |
563 | MAGIC* moremagic; | |
7918f24d NC |
564 | |
565 | PERL_ARGS_ASSERT_MG_FREE; | |
566 | ||
79072805 | 567 | for (mg = SvMAGIC(sv); mg; mg = moremagic) { |
79072805 | 568 | moremagic = mg->mg_moremagic; |
d9088386 | 569 | mg_free_struct(sv, mg); |
c826f41b | 570 | SvMAGIC_set(sv, moremagic); |
79072805 | 571 | } |
b162af07 | 572 | SvMAGIC_set(sv, NULL); |
68f8932e | 573 | SvMAGICAL_off(sv); |
79072805 LW |
574 | return 0; |
575 | } | |
576 | ||
d9088386 Z |
577 | /* |
578 | =for apidoc Am|void|mg_free_type|SV *sv|int how | |
579 | ||
2d7f6611 | 580 | Remove any magic of type C<how> from the SV C<sv>. See L</sv_magic>. |
d9088386 Z |
581 | |
582 | =cut | |
583 | */ | |
584 | ||
585 | void | |
586 | Perl_mg_free_type(pTHX_ SV *sv, int how) | |
587 | { | |
588 | MAGIC *mg, *prevmg, *moremg; | |
589 | PERL_ARGS_ASSERT_MG_FREE_TYPE; | |
590 | for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) { | |
591 | MAGIC *newhead; | |
592 | moremg = mg->mg_moremagic; | |
593 | if (mg->mg_type == how) { | |
594 | /* temporarily move to the head of the magic chain, in case | |
595 | custom free code relies on this historical aspect of mg_free */ | |
596 | if (prevmg) { | |
597 | prevmg->mg_moremagic = moremg; | |
598 | mg->mg_moremagic = SvMAGIC(sv); | |
599 | SvMAGIC_set(sv, mg); | |
600 | } | |
601 | newhead = mg->mg_moremagic; | |
602 | mg_free_struct(sv, mg); | |
603 | SvMAGIC_set(sv, newhead); | |
604 | mg = prevmg; | |
605 | } | |
606 | } | |
607 | mg_magical(sv); | |
608 | } | |
609 | ||
79072805 | 610 | #include <signal.h> |
79072805 | 611 | |
942e002e | 612 | U32 |
864dbfa3 | 613 | Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 614 | { |
8772537c | 615 | PERL_UNUSED_ARG(sv); |
6cef1e77 | 616 | |
7918f24d NC |
617 | PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT; |
618 | ||
0bd48802 | 619 | if (PL_curpm) { |
27deb0cf | 620 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 621 | if (rx) { |
27deb0cf YO |
622 | UV uv= (UV)mg->mg_obj; |
623 | if (uv == '+') { /* @+ */ | |
a678b0e4 | 624 | /* return the number possible */ |
07bc277f | 625 | return RX_NPARENS(rx); |
27deb0cf | 626 | } else { /* @- @^CAPTURE @{^CAPTURE} */ |
07bc277f | 627 | I32 paren = RX_LASTPAREN(rx); |
a678b0e4 YO |
628 | |
629 | /* return the last filled */ | |
f46c4081 | 630 | while ( paren >= 0 |
07bc277f NC |
631 | && (RX_OFFS(rx)[paren].start == -1 |
632 | || RX_OFFS(rx)[paren].end == -1) ) | |
f46c4081 | 633 | paren--; |
27deb0cf YO |
634 | if (uv == '-') { |
635 | /* @- */ | |
636 | return (U32)paren; | |
637 | } else { | |
638 | /* @^CAPTURE @{^CAPTURE} */ | |
639 | return paren >= 0 ? (U32)(paren-1) : (U32)-1; | |
640 | } | |
641 | } | |
0bd48802 | 642 | } |
8f580fb8 | 643 | } |
ac27b0f5 | 644 | |
942e002e | 645 | return (U32)-1; |
6cef1e77 IZ |
646 | } |
647 | ||
6502e081 DM |
648 | /* @-, @+ */ |
649 | ||
6cef1e77 | 650 | int |
864dbfa3 | 651 | Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg) |
6cef1e77 | 652 | { |
7918f24d NC |
653 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET; |
654 | ||
0bd48802 | 655 | if (PL_curpm) { |
27deb0cf | 656 | REGEXP * const rx = PM_GETRE(PL_curpm); |
0bd48802 | 657 | if (rx) { |
27deb0cf YO |
658 | const UV uv= (UV)mg->mg_obj; |
659 | /* @{^CAPTURE} does not contain $&, so we need to increment by 1 */ | |
660 | const I32 paren = mg->mg_len | |
661 | + (uv == '\003' ? 1 : 0); | |
a10eae29 FC |
662 | SSize_t s; |
663 | SSize_t t; | |
0bd48802 AL |
664 | if (paren < 0) |
665 | return 0; | |
07bc277f NC |
666 | if (paren <= (I32)RX_NPARENS(rx) && |
667 | (s = RX_OFFS(rx)[paren].start) != -1 && | |
668 | (t = RX_OFFS(rx)[paren].end) != -1) | |
0bd48802 | 669 | { |
a10eae29 | 670 | SSize_t i; |
27deb0cf YO |
671 | |
672 | if (uv == '+') /* @+ */ | |
0bd48802 | 673 | i = t; |
27deb0cf | 674 | else if (uv == '-') /* @- */ |
0bd48802 | 675 | i = s; |
27deb0cf YO |
676 | else { /* @^CAPTURE @{^CAPTURE} */ |
677 | CALLREG_NUMBUF_FETCH(rx,paren,sv); | |
678 | return 0; | |
679 | } | |
0bd48802 | 680 | |
a10eae29 | 681 | if (RX_MATCH_UTF8(rx)) { |
07bc277f | 682 | const char * const b = RX_SUBBEG(rx); |
0bd48802 | 683 | if (b) |
6502e081 DM |
684 | i = RX_SUBCOFFSET(rx) + |
685 | utf8_length((U8*)b, | |
686 | (U8*)(b-RX_SUBOFFSET(rx)+i)); | |
0bd48802 | 687 | } |
727405f8 | 688 | |
a10eae29 | 689 | sv_setuv(sv, i); |
232af1f8 | 690 | return 0; |
1aa99e6b | 691 | } |
0bd48802 | 692 | } |
6cef1e77 | 693 | } |
232af1f8 | 694 | sv_setsv(sv, NULL); |
6cef1e77 IZ |
695 | return 0; |
696 | } | |
697 | ||
6502e081 DM |
698 | /* @-, @+ */ |
699 | ||
e4b89193 | 700 | int |
a29d06ed MG |
701 | Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg) |
702 | { | |
7918f24d | 703 | PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET; |
dc3bf405 | 704 | PERL_UNUSED_CONTEXT; |
d4c19fe8 AL |
705 | PERL_UNUSED_ARG(sv); |
706 | PERL_UNUSED_ARG(mg); | |
cb077ed2 | 707 | Perl_croak_no_modify(); |
0dbb1585 | 708 | NORETURN_FUNCTION_END; |
a29d06ed MG |
709 | } |
710 | ||
ad3296c6 | 711 | #define SvRTRIM(sv) STMT_START { \ |
eae92ea0 GA |
712 | if (SvPOK(sv)) { \ |
713 | STRLEN len = SvCUR(sv); \ | |
714 | char * const p = SvPVX(sv); \ | |
8e6b4db6 PC |
715 | while (len > 0 && isSPACE(p[len-1])) \ |
716 | --len; \ | |
717 | SvCUR_set(sv, len); \ | |
718 | p[len] = '\0'; \ | |
719 | } \ | |
ad3296c6 SH |
720 | } STMT_END |
721 | ||
8b850bd5 NC |
722 | void |
723 | Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv) | |
724 | { | |
7918f24d NC |
725 | PERL_ARGS_ASSERT_EMULATE_COP_IO; |
726 | ||
8b850bd5 NC |
727 | if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT))) |
728 | sv_setsv(sv, &PL_sv_undef); | |
729 | else { | |
b2aed775 | 730 | SvPVCLEAR(sv); |
8b850bd5 NC |
731 | SvUTF8_off(sv); |
732 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) { | |
20439bc7 | 733 | SV *const value = cop_hints_fetch_pvs(c, "open<", 0); |
8b850bd5 NC |
734 | assert(value); |
735 | sv_catsv(sv, value); | |
736 | } | |
737 | sv_catpvs(sv, "\0"); | |
738 | if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) { | |
20439bc7 | 739 | SV *const value = cop_hints_fetch_pvs(c, "open>", 0); |
8b850bd5 NC |
740 | assert(value); |
741 | sv_catsv(sv, value); | |
742 | } | |
743 | } | |
744 | } | |
745 | ||
d9fe7d23 KW |
746 | STATIC void |
747 | S_fixup_errno_string(pTHX_ SV* sv) | |
748 | { | |
749 | /* Do what is necessary to fixup the non-empty string in 'sv' for return to | |
750 | * Perl space. */ | |
751 | ||
752 | PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING; | |
753 | ||
754 | assert(SvOK(sv)); | |
b35e4f8b KW |
755 | |
756 | if(strEQ(SvPVX(sv), "")) { | |
757 | sv_catpv(sv, UNKNOWN_ERRNO_MSG); | |
758 | } | |
759 | else { | |
d9fe7d23 | 760 | |
d3c0b317 KW |
761 | /* In some locales the error string may come back as UTF-8, in which |
762 | * case we should turn on that flag. This didn't use to happen, and to | |
5320b60d KW |
763 | * avoid as many possible backward compatibility issues as possible, we |
764 | * don't turn on the flag unless we have to. So the flag stays off for | |
9f10db87 KW |
765 | * an entirely invariant string. We assume that if the string looks |
766 | * like UTF-8, it really is UTF-8: "text in any other encoding that | |
767 | * uses bytes with the high bit set is extremely unlikely to pass a | |
768 | * UTF-8 validity test" | |
769 | * (http://en.wikipedia.org/wiki/Charset_detection). There is a | |
770 | * potential that we will get it wrong however, especially on short | |
771 | * error message text. (If it turns out to be necessary, we could also | |
772 | * keep track if the current LC_MESSAGES locale is UTF-8) */ | |
d3c0b317 | 773 | if (! IN_BYTES /* respect 'use bytes' */ |
c5f058df | 774 | && ! is_utf8_invariant_string((U8*) SvPVX_const(sv), SvCUR(sv)) |
d3c0b317 KW |
775 | && is_utf8_string((U8*) SvPVX_const(sv), SvCUR(sv))) |
776 | { | |
777 | SvUTF8_on(sv); | |
778 | } | |
b35e4f8b | 779 | } |
d9fe7d23 KW |
780 | } |
781 | ||
25bbd826 CB |
782 | #ifdef VMS |
783 | #include <descrip.h> | |
784 | #include <starlet.h> | |
785 | #endif | |
786 | ||
79072805 | 787 | int |
864dbfa3 | 788 | Perl_magic_get(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 789 | { |
eb578fdb KW |
790 | I32 paren; |
791 | const char *s = NULL; | |
792 | REGEXP *rx; | |
823a54a3 | 793 | const char * const remaining = mg->mg_ptr + 1; |
e91d8259 | 794 | char nextchar; |
79072805 | 795 | |
7918f24d NC |
796 | PERL_ARGS_ASSERT_MAGIC_GET; |
797 | ||
e91d8259 | 798 | if (!mg->mg_ptr) { |
e91d8259 | 799 | paren = mg->mg_len; |
e91d8259 | 800 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
a6d0b1b5 | 801 | do_numbuf_fetch: |
e91d8259 NC |
802 | CALLREG_NUMBUF_FETCH(rx,paren,sv); |
803 | } else { | |
804 | sv_setsv(sv,&PL_sv_undef); | |
805 | } | |
806 | return 0; | |
807 | } | |
808 | ||
809 | nextchar = *remaining; | |
79072805 | 810 | switch (*mg->mg_ptr) { |
748a9306 | 811 | case '\001': /* ^A */ |
f2da823f FC |
812 | if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget); |
813 | else sv_setsv(sv, &PL_sv_undef); | |
125b9982 NT |
814 | if (SvTAINTED(PL_bodytarget)) |
815 | SvTAINTED_on(sv); | |
748a9306 | 816 | break; |
e5218da5 | 817 | case '\003': /* ^C, ^CHILD_ERROR_NATIVE */ |
823a54a3 | 818 | if (nextchar == '\0') { |
e5218da5 GA |
819 | sv_setiv(sv, (IV)PL_minus_c); |
820 | } | |
823a54a3 | 821 | else if (strEQ(remaining, "HILD_ERROR_NATIVE")) { |
e5218da5 GA |
822 | sv_setiv(sv, (IV)STATUS_NATIVE); |
823 | } | |
49460fe6 NIS |
824 | break; |
825 | ||
79072805 | 826 | case '\004': /* ^D */ |
aea4f609 | 827 | sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK)); |
79072805 | 828 | break; |
28f23441 | 829 | case '\005': /* ^E */ |
6c6eab55 KW |
830 | if (nextchar != '\0') { |
831 | if (strEQ(remaining, "NCODING")) | |
199670db | 832 | sv_setsv(sv, NULL); |
4f4ff3a7 | 833 | break; |
6c6eab55 | 834 | } |
4f4ff3a7 KW |
835 | |
836 | #if defined(VMS) || defined(OS2) || defined(WIN32) | |
837 | # if defined(VMS) | |
2a99ff86 KW |
838 | { |
839 | char msg[255]; | |
840 | $DESCRIPTOR(msgdsc,msg); | |
841 | sv_setnv(sv,(NV) vaxc$errno); | |
842 | if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1) | |
843 | sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length); | |
844 | else | |
b2aed775 | 845 | SvPVCLEAR(sv); |
2a99ff86 | 846 | } |
4b645107 | 847 | #elif defined(OS2) |
2a99ff86 KW |
848 | if (!(_emx_env & 0x200)) { /* Under DOS */ |
849 | sv_setnv(sv, (NV)errno); | |
2c6ee1a7 | 850 | sv_setpv(sv, errno ? my_strerror(errno) : ""); |
2a99ff86 KW |
851 | } else { |
852 | if (errno != errno_isOS2) { | |
853 | const int tmp = _syserrno(); | |
854 | if (tmp) /* 2nd call to _syserrno() makes it 0 */ | |
855 | Perl_rc = tmp; | |
856 | } | |
857 | sv_setnv(sv, (NV)Perl_rc); | |
858 | sv_setpv(sv, os2error(Perl_rc)); | |
859 | } | |
1534c6f5 | 860 | if (SvOK(sv) && strNE(SvPVX(sv), "")) { |
99461a73 KW |
861 | fixup_errno_string(sv); |
862 | } | |
4f4ff3a7 | 863 | # elif defined(WIN32) |
2a99ff86 KW |
864 | { |
865 | const DWORD dwErr = GetLastError(); | |
866 | sv_setnv(sv, (NV)dwErr); | |
867 | if (dwErr) { | |
868 | PerlProc_GetOSError(sv, dwErr); | |
2efab60d | 869 | fixup_errno_string(sv); |
2a99ff86 KW |
870 | } |
871 | else | |
b2aed775 | 872 | SvPVCLEAR(sv); |
2a99ff86 KW |
873 | SetLastError(dwErr); |
874 | } | |
4f4ff3a7 KW |
875 | # else |
876 | # error Missing code for platform | |
877 | # endif | |
2a99ff86 KW |
878 | SvRTRIM(sv); |
879 | SvNOK_on(sv); /* what a wonderful hack! */ | |
880 | break; | |
4f4ff3a7 KW |
881 | #endif /* End of platforms with special handling for $^E; others just fall |
882 | through to $! */ | |
46f3e16c KW |
883 | |
884 | case '!': | |
885 | { | |
5f1b979d | 886 | dSAVE_ERRNO; |
46f3e16c | 887 | #ifdef VMS |
5f1b979d | 888 | sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno)); |
46f3e16c | 889 | #else |
5f1b979d | 890 | sv_setnv(sv, (NV)errno); |
46f3e16c KW |
891 | #endif |
892 | #ifdef OS2 | |
5f1b979d KW |
893 | if (errno == errno_isOS2 || errno == errno_isOS2_set) |
894 | sv_setpv(sv, os2error(Perl_rc)); | |
895 | else | |
46f3e16c | 896 | #endif |
5f1b979d | 897 | if (! errno) { |
b2aed775 | 898 | SvPVCLEAR(sv); |
46f3e16c | 899 | } |
5f1b979d KW |
900 | else { |
901 | ||
902 | /* Strerror can return NULL on some platforms, which will | |
903 | * result in 'sv' not being considered SvOK. The SvNOK_on() | |
904 | * below will cause just the number part to be valid */ | |
2c6ee1a7 | 905 | sv_setpv(sv, my_strerror(errno)); |
5f1b979d KW |
906 | if (SvOK(sv)) { |
907 | fixup_errno_string(sv); | |
908 | } | |
909 | } | |
910 | RESTORE_ERRNO; | |
46f3e16c KW |
911 | } |
912 | ||
913 | SvRTRIM(sv); | |
914 | SvNOK_on(sv); /* what a wonderful hack! */ | |
915 | break; | |
916 | ||
79072805 | 917 | case '\006': /* ^F */ |
3280af22 | 918 | sv_setiv(sv, (IV)PL_maxsysfd); |
79072805 | 919 | break; |
9ebf26ad FR |
920 | case '\007': /* ^GLOBAL_PHASE */ |
921 | if (strEQ(remaining, "LOBAL_PHASE")) { | |
922 | sv_setpvn(sv, PL_phase_names[PL_phase], | |
923 | strlen(PL_phase_names[PL_phase])); | |
924 | } | |
925 | break; | |
a0d0e21e | 926 | case '\010': /* ^H */ |
3280af22 | 927 | sv_setiv(sv, (IV)PL_hints); |
a0d0e21e | 928 | break; |
9d116dd7 | 929 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
120f7abe | 930 | sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */ |
79072805 | 931 | break; |
8561ea1d FC |
932 | case '\014': /* ^LAST_FH */ |
933 | if (strEQ(remaining, "AST_FH")) { | |
934 | if (PL_last_in_gv) { | |
935 | assert(isGV_with_GP(PL_last_in_gv)); | |
936 | SV_CHECK_THINKFIRST_COW_DROP(sv); | |
937 | prepare_SV_for_RV(sv); | |
938 | SvOK_off(sv); | |
939 | SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv)); | |
940 | SvROK_on(sv); | |
941 | sv_rvweaken(sv); | |
942 | } | |
943 | else sv_setsv_nomg(sv, NULL); | |
944 | } | |
945 | break; | |
ac27b0f5 | 946 | case '\017': /* ^O & ^OPEN */ |
823a54a3 | 947 | if (nextchar == '\0') { |
ac27b0f5 | 948 | sv_setpv(sv, PL_osname); |
3511154c DM |
949 | SvTAINTED_off(sv); |
950 | } | |
823a54a3 | 951 | else if (strEQ(remaining, "PEN")) { |
8b850bd5 | 952 | Perl_emulate_cop_io(aTHX_ &PL_compiling, sv); |
ac27b0f5 | 953 | } |
28f23441 | 954 | break; |
9ebf26ad | 955 | case '\020': |
a6d0b1b5 | 956 | sv_setiv(sv, (IV)PL_perldb); |
79072805 | 957 | break; |
fb73857a | 958 | case '\023': /* ^S */ |
a6d0b1b5 | 959 | { |
bc177e6b | 960 | if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING) |
0c34ef67 | 961 | SvOK_off(sv); |
3280af22 | 962 | else if (PL_in_eval) |
6dc8a9e4 | 963 | sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE)); |
a4268c0a AMS |
964 | else |
965 | sv_setiv(sv, 0); | |
d58bf5aa | 966 | } |
fb73857a | 967 | break; |
79072805 | 968 | case '\024': /* ^T */ |
823a54a3 | 969 | if (nextchar == '\0') { |
88e89b8a | 970 | #ifdef BIG_TIME |
7c36658b | 971 | sv_setnv(sv, PL_basetime); |
88e89b8a | 972 | #else |
7c36658b | 973 | sv_setiv(sv, (IV)PL_basetime); |
88e89b8a | 974 | #endif |
7c36658b | 975 | } |
823a54a3 | 976 | else if (strEQ(remaining, "AINT")) |
284167a5 SM |
977 | sv_setiv(sv, TAINTING_get |
978 | ? (TAINT_WARN_get || PL_unsafe ? -1 : 1) | |
9aa05f58 | 979 | : 0); |
7c36658b | 980 | break; |
e07ea26a | 981 | case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */ |
823a54a3 | 982 | if (strEQ(remaining, "NICODE")) |
a05d7ebb | 983 | sv_setuv(sv, (UV) PL_unicode); |
823a54a3 | 984 | else if (strEQ(remaining, "TF8LOCALE")) |
7cebcbc0 | 985 | sv_setuv(sv, (UV) PL_utf8locale); |
e07ea26a NC |
986 | else if (strEQ(remaining, "TF8CACHE")) |
987 | sv_setiv(sv, (IV) PL_utf8cache); | |
fde18df1 JH |
988 | break; |
989 | case '\027': /* ^W & $^WARNING_BITS */ | |
823a54a3 | 990 | if (nextchar == '\0') |
4438c4b7 | 991 | sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE)); |
823a54a3 | 992 | else if (strEQ(remaining, "ARNING_BITS")) { |
013b78e8 | 993 | if (PL_compiling.cop_warnings == pWARN_NONE) { |
4438c4b7 | 994 | sv_setpvn(sv, WARN_NONEstring, WARNsize) ; |
013b78e8 RGS |
995 | } |
996 | else if (PL_compiling.cop_warnings == pWARN_STD) { | |
7e4f0450 FC |
997 | sv_setsv(sv, &PL_sv_undef); |
998 | break; | |
013b78e8 | 999 | } |
d3a7d8c7 | 1000 | else if (PL_compiling.cop_warnings == pWARN_ALL) { |
75b6c4ca RGS |
1001 | /* Get the bit mask for $warnings::Bits{all}, because |
1002 | * it could have been extended by warnings::register */ | |
4bac9ae4 CS |
1003 | HV * const bits = get_hv("warnings::Bits", 0); |
1004 | SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL; | |
1005 | if (bits_all) | |
1006 | sv_copypv(sv, *bits_all); | |
1007 | else | |
1008 | sv_setpvn(sv, WARN_ALLstring, WARNsize); | |
ac27b0f5 | 1009 | } |
4438c4b7 | 1010 | else { |
72dc9ed5 NC |
1011 | sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1), |
1012 | *PL_compiling.cop_warnings); | |
ac27b0f5 | 1013 | } |
4438c4b7 | 1014 | } |
8ca2a5d6 DD |
1015 | #ifdef WIN32 |
1016 | else if (strEQ(remaining, "IN32_SLOPPY_STAT")) { | |
1017 | sv_setiv(sv, w32_sloppystat); | |
1018 | } | |
1019 | #endif | |
79072805 | 1020 | break; |
79072805 | 1021 | case '+': |
aaa362c4 | 1022 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
2c7b5d76 DM |
1023 | paren = RX_LASTPAREN(rx); |
1024 | if (paren) | |
1025 | goto do_numbuf_fetch; | |
79072805 | 1026 | } |
3280af22 | 1027 | sv_setsv(sv,&PL_sv_undef); |
79072805 | 1028 | break; |
a01268b5 JH |
1029 | case '\016': /* ^N */ |
1030 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { | |
2c7b5d76 DM |
1031 | paren = RX_LASTCLOSEPAREN(rx); |
1032 | if (paren) | |
1033 | goto do_numbuf_fetch; | |
a01268b5 JH |
1034 | } |
1035 | sv_setsv(sv,&PL_sv_undef); | |
1036 | break; | |
79072805 | 1037 | case '.': |
3280af22 | 1038 | if (GvIO(PL_last_in_gv)) { |
357c8808 | 1039 | sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv))); |
79072805 | 1040 | } |
79072805 LW |
1041 | break; |
1042 | case '?': | |
809a5acc | 1043 | { |
809a5acc | 1044 | sv_setiv(sv, (IV)STATUS_CURRENT); |
ff0cee69 | 1045 | #ifdef COMPLEX_STATUS |
41cb7b2b | 1046 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
1047 | LvTARGOFF(sv) = PL_statusvalue; |
1048 | LvTARGLEN(sv) = PL_statusvalue_vms; | |
ff0cee69 | 1049 | #endif |
809a5acc | 1050 | } |
79072805 LW |
1051 | break; |
1052 | case '^': | |
acbe1b9d | 1053 | if (GvIOp(PL_defoutgv)) |
099be4f1 | 1054 | s = IoTOP_NAME(GvIOp(PL_defoutgv)); |
79072805 LW |
1055 | if (s) |
1056 | sv_setpv(sv,s); | |
1057 | else { | |
3280af22 | 1058 | sv_setpv(sv,GvENAME(PL_defoutgv)); |
cb421d5e | 1059 | sv_catpvs(sv,"_TOP"); |
79072805 LW |
1060 | } |
1061 | break; | |
1062 | case '~': | |
acbe1b9d | 1063 | if (GvIOp(PL_defoutgv)) |
0daa599b | 1064 | s = IoFMT_NAME(GvIOp(PL_defoutgv)); |
79072805 | 1065 | if (!s) |
3280af22 | 1066 | s = GvENAME(PL_defoutgv); |
79072805 LW |
1067 | sv_setpv(sv,s); |
1068 | break; | |
79072805 | 1069 | case '=': |
099be4f1 | 1070 | if (GvIO(PL_defoutgv)) |
0daa599b | 1071 | sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv))); |
79072805 LW |
1072 | break; |
1073 | case '-': | |
099be4f1 | 1074 | if (GvIO(PL_defoutgv)) |
0daa599b | 1075 | sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv))); |
79072805 LW |
1076 | break; |
1077 | case '%': | |
099be4f1 | 1078 | if (GvIO(PL_defoutgv)) |
0daa599b | 1079 | sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv))); |
79072805 | 1080 | break; |
79072805 | 1081 | case ':': |
79072805 LW |
1082 | case '/': |
1083 | break; | |
1084 | case '[': | |
e1dccc0d | 1085 | sv_setiv(sv, 0); |
79072805 LW |
1086 | break; |
1087 | case '|': | |
099be4f1 | 1088 | if (GvIO(PL_defoutgv)) |
0daa599b | 1089 | sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 ); |
79072805 | 1090 | break; |
79072805 | 1091 | case '\\': |
b2ce0fda | 1092 | if (PL_ors_sv) |
f28098ff | 1093 | sv_copypv(sv, PL_ors_sv); |
4bac9ae4 CS |
1094 | else |
1095 | sv_setsv(sv, &PL_sv_undef); | |
79072805 | 1096 | break; |
0e219455 | 1097 | case '$': /* $$ */ |
9cdac2a2 FC |
1098 | { |
1099 | IV const pid = (IV)PerlProc_getpid(); | |
19db9fb7 | 1100 | if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) { |
9cdac2a2 FC |
1101 | /* never set manually, or at least not since last fork */ |
1102 | sv_setiv(sv, pid); | |
19db9fb7 Z |
1103 | /* never unsafe, even if reading in a tainted expression */ |
1104 | SvTAINTED_off(sv); | |
1105 | } | |
9cdac2a2 FC |
1106 | /* else a value has been assigned manually, so do nothing */ |
1107 | } | |
0e219455 | 1108 | break; |
79072805 | 1109 | case '<': |
dfff4baf | 1110 | sv_setuid(sv, PerlProc_getuid()); |
79072805 LW |
1111 | break; |
1112 | case '>': | |
dfff4baf | 1113 | sv_setuid(sv, PerlProc_geteuid()); |
79072805 LW |
1114 | break; |
1115 | case '(': | |
dfff4baf | 1116 | sv_setgid(sv, PerlProc_getgid()); |
79072805 LW |
1117 | goto add_groups; |
1118 | case ')': | |
dfff4baf | 1119 | sv_setgid(sv, PerlProc_getegid()); |
79072805 | 1120 | add_groups: |
79072805 | 1121 | #ifdef HAS_GETGROUPS |
79072805 | 1122 | { |
57d7c65e | 1123 | Groups_t *gary = NULL; |
375ed12a JH |
1124 | I32 i; |
1125 | I32 num_groups = getgroups(0, gary); | |
1126 | if (num_groups > 0) { | |
1127 | Newx(gary, num_groups, Groups_t); | |
1128 | num_groups = getgroups(num_groups, gary); | |
1129 | for (i = 0; i < num_groups; i++) | |
1130 | Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]); | |
1131 | Safefree(gary); | |
1132 | } | |
79072805 | 1133 | } |
155aba94 | 1134 | (void)SvIOK_on(sv); /* what a wonderful hack! */ |
cd70abae | 1135 | #endif |
79072805 | 1136 | break; |
79072805 LW |
1137 | case '0': |
1138 | break; | |
1139 | } | |
a0d0e21e | 1140 | return 0; |
79072805 LW |
1141 | } |
1142 | ||
1143 | int | |
864dbfa3 | 1144 | Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1145 | { |
8772537c | 1146 | struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 1147 | |
7918f24d NC |
1148 | PERL_ARGS_ASSERT_MAGIC_GETUVAR; |
1149 | ||
79072805 | 1150 | if (uf && uf->uf_val) |
24f81a43 | 1151 | (*uf->uf_val)(aTHX_ uf->uf_index, sv); |
79072805 LW |
1152 | return 0; |
1153 | } | |
1154 | ||
1155 | int | |
864dbfa3 | 1156 | Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1157 | { |
9ae3433d | 1158 | STRLEN len = 0, klen; |
12033064 | 1159 | const char * const key = MgPV_const(mg,klen); |
888a67f6 | 1160 | const char *s = ""; |
1e422769 | 1161 | |
7918f24d NC |
1162 | PERL_ARGS_ASSERT_MAGIC_SETENV; |
1163 | ||
613c63b4 | 1164 | SvGETMAGIC(sv); |
12033064 | 1165 | if (SvOK(sv)) { |
613c63b4 CS |
1166 | /* defined environment variables are byte strings; unfortunately |
1167 | there is no SvPVbyte_force_nomg(), so we must do this piecewise */ | |
1168 | (void)SvPV_force_nomg_nolen(sv); | |
1169 | sv_utf8_downgrade(sv, /* fail_ok */ TRUE); | |
1170 | if (SvUTF8(sv)) { | |
1171 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv"); | |
1172 | SvUTF8_off(sv); | |
1173 | } | |
1174 | s = SvPVX(sv); | |
1175 | len = SvCUR(sv); | |
12033064 CS |
1176 | } |
1177 | my_setenv(key, s); /* does the deed */ | |
1178 | ||
a0d0e21e LW |
1179 | #ifdef DYNAMIC_ENV_FETCH |
1180 | /* We just undefd an environment var. Is a replacement */ | |
1181 | /* waiting in the wings? */ | |
1182 | if (!len) { | |
6bd66ee9 | 1183 | SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE); |
fabdb6c0 | 1184 | if (valp) |
4ab59fcc | 1185 | s = SvOK(*valp) ? SvPV_const(*valp, len) : ""; |
a0d0e21e LW |
1186 | } |
1187 | #endif | |
1e422769 | 1188 | |
28542d8f | 1189 | #if !defined(OS2) && !defined(WIN32) && !defined(MSDOS) |
79072805 LW |
1190 | /* And you'll never guess what the dog had */ |
1191 | /* in its mouth... */ | |
284167a5 | 1192 | if (TAINTING_get) { |
1e422769 PP |
1193 | MgTAINTEDDIR_off(mg); |
1194 | #ifdef VMS | |
b2aed775 | 1195 | if (s && memEQs(key, klen, "DCL$PATH")) { |
b8ffc8df | 1196 | char pathbuf[256], eltbuf[256], *cp, *elt; |
1e422769 PP |
1197 | int i = 0, j = 0; |
1198 | ||
6fca0082 | 1199 | my_strlcpy(eltbuf, s, sizeof(eltbuf)); |
b8ffc8df | 1200 | elt = eltbuf; |
1e422769 PP |
1201 | do { /* DCL$PATH may be a search list */ |
1202 | while (1) { /* as may dev portion of any element */ | |
1203 | if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) { | |
1204 | if ( *(cp+1) == '.' || *(cp+1) == '-' || | |
1205 | cando_by_name(S_IWUSR,0,elt) ) { | |
1206 | MgTAINTEDDIR_on(mg); | |
1207 | return 0; | |
1208 | } | |
1209 | } | |
bd61b366 | 1210 | if ((cp = strchr(elt, ':')) != NULL) |
1e422769 PP |
1211 | *cp = '\0'; |
1212 | if (my_trnlnm(elt, eltbuf, j++)) | |
1213 | elt = eltbuf; | |
1214 | else | |
1215 | break; | |
1216 | } | |
1217 | j = 0; | |
1218 | } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf)); | |
1219 | } | |
1220 | #endif /* VMS */ | |
b2aed775 | 1221 | if (s && memEQs(key, klen, "PATH")) { |
8772537c | 1222 | const char * const strend = s + len; |
463ee0b2 | 1223 | |
70b484a8 DM |
1224 | /* set MGf_TAINTEDDIR if any component of the new path is |
1225 | * relative or world-writeable */ | |
463ee0b2 | 1226 | while (s < strend) { |
96827780 | 1227 | char tmpbuf[256]; |
c623ac67 | 1228 | Stat_t st; |
5f74f29c | 1229 | I32 i; |
83269ced CB |
1230 | #ifdef __VMS /* Hmm. How do we get $Config{path_sep} from C? */ |
1231 | const char path_sep = PL_perllib_sep; | |
f5a63d97 AL |
1232 | #else |
1233 | const char path_sep = ':'; | |
1234 | #endif | |
ba0a4150 | 1235 | s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, |
427eaa01 | 1236 | s, strend, path_sep, &i); |
463ee0b2 | 1237 | s++; |
bb7a0f54 | 1238 | if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */ |
83269ced CB |
1239 | #ifdef __VMS |
1240 | /* no colon thus no device name -- assume relative path */ | |
1241 | || (PL_perllib_sep != ':' && !strchr(tmpbuf, ':')) | |
1242 | /* Using Unix separator, e.g. under bash, so act line Unix */ | |
1243 | || (PL_perllib_sep == ':' && *tmpbuf != '/') | |
326b5008 CB |
1244 | #else |
1245 | || *tmpbuf != '/' /* no starting slash -- assume relative path */ | |
1246 | #endif | |
c6ed36e1 | 1247 | || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) { |
8990e307 | 1248 | MgTAINTEDDIR_on(mg); |
1e422769 PP |
1249 | return 0; |
1250 | } | |
463ee0b2 | 1251 | } |
79072805 LW |
1252 | } |
1253 | } | |
28542d8f | 1254 | #endif /* neither OS2 nor WIN32 nor MSDOS */ |
1e422769 | 1255 | |
79072805 LW |
1256 | return 0; |
1257 | } | |
1258 | ||
1259 | int | |
864dbfa3 | 1260 | Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg) |
85e6fe83 | 1261 | { |
7918f24d | 1262 | PERL_ARGS_ASSERT_MAGIC_CLEARENV; |
8772537c | 1263 | PERL_UNUSED_ARG(sv); |
bd61b366 | 1264 | my_setenv(MgPV_nolen_const(mg),NULL); |
85e6fe83 LW |
1265 | return 0; |
1266 | } | |
1267 | ||
88e89b8a | 1268 | int |
864dbfa3 | 1269 | Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg) |
fb73857a | 1270 | { |
7918f24d | 1271 | PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV; |
65e66c80 | 1272 | PERL_UNUSED_ARG(mg); |
b0269e46 | 1273 | #if defined(VMS) |
cea2e8a9 | 1274 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); |
fb73857a | 1275 | #else |
3280af22 | 1276 | if (PL_localizing) { |
fb73857a | 1277 | HE* entry; |
b0269e46 | 1278 | my_clearenv(); |
85fbaab2 NC |
1279 | hv_iterinit(MUTABLE_HV(sv)); |
1280 | while ((entry = hv_iternext(MUTABLE_HV(sv)))) { | |
fb73857a PP |
1281 | I32 keylen; |
1282 | my_setenv(hv_iterkey(entry, &keylen), | |
85fbaab2 | 1283 | SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry))); |
fb73857a PP |
1284 | } |
1285 | } | |
1286 | #endif | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | int | |
864dbfa3 | 1291 | Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg) |
66b1d557 | 1292 | { |
7918f24d | 1293 | PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV; |
8772537c AL |
1294 | PERL_UNUSED_ARG(sv); |
1295 | PERL_UNUSED_ARG(mg); | |
b0269e46 AB |
1296 | #if defined(VMS) |
1297 | Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system"); | |
1298 | #else | |
1299 | my_clearenv(); | |
1300 | #endif | |
3e3baf6d | 1301 | return 0; |
66b1d557 HM |
1302 | } |
1303 | ||
64ca3a65 | 1304 | #ifndef PERL_MICRO |
2d4fcd5e AJ |
1305 | #ifdef HAS_SIGPROCMASK |
1306 | static void | |
1307 | restore_sigmask(pTHX_ SV *save_sv) | |
1308 | { | |
0bd48802 | 1309 | const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv ); |
f5a63d97 | 1310 | (void)sigprocmask(SIG_SETMASK, ossetp, NULL); |
2d4fcd5e AJ |
1311 | } |
1312 | #endif | |
66b1d557 | 1313 | int |
864dbfa3 | 1314 | Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1315 | { |
88e89b8a | 1316 | /* Are we fetching a signal entry? */ |
708854f2 | 1317 | int i = (I16)mg->mg_private; |
7918f24d NC |
1318 | |
1319 | PERL_ARGS_ASSERT_MAGIC_GETSIG; | |
1320 | ||
708854f2 | 1321 | if (!i) { |
84c7b88c BF |
1322 | STRLEN siglen; |
1323 | const char * sig = MgPV_const(mg, siglen); | |
1324 | mg->mg_private = i = whichsig_pvn(sig, siglen); | |
708854f2 NC |
1325 | } |
1326 | ||
e02bfb16 | 1327 | if (i > 0) { |
22c35a8c GS |
1328 | if(PL_psig_ptr[i]) |
1329 | sv_setsv(sv,PL_psig_ptr[i]); | |
88e89b8a | 1330 | else { |
46da273f | 1331 | Sighandler_t sigstate = rsignal_state(i); |
23ada85b | 1332 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
46da273f AL |
1333 | if (PL_sig_handlers_initted && PL_sig_ignoring[i]) |
1334 | sigstate = SIG_IGN; | |
2e34cc90 CL |
1335 | #endif |
1336 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
46da273f AL |
1337 | if (PL_sig_handlers_initted && PL_sig_defaulting[i]) |
1338 | sigstate = SIG_DFL; | |
85b332e2 | 1339 | #endif |
88e89b8a | 1340 | /* cache state so we don't fetch it again */ |
8aad04aa | 1341 | if(sigstate == (Sighandler_t) SIG_IGN) |
6502358f | 1342 | sv_setpvs(sv,"IGNORE"); |
88e89b8a | 1343 | else |
3280af22 | 1344 | sv_setsv(sv,&PL_sv_undef); |
46da273f | 1345 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); |
88e89b8a PP |
1346 | SvTEMP_off(sv); |
1347 | } | |
1348 | } | |
1349 | return 0; | |
1350 | } | |
1351 | int | |
864dbfa3 | 1352 | Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg) |
88e89b8a | 1353 | { |
7918f24d | 1354 | PERL_ARGS_ASSERT_MAGIC_CLEARSIG; |
179c85a2 | 1355 | |
38a124f0 | 1356 | magic_setsig(NULL, mg); |
179c85a2 | 1357 | return sv_unmagic(sv, mg->mg_type); |
88e89b8a | 1358 | } |
3d37d572 | 1359 | |
0a8e0eff | 1360 | Signal_t |
8aad04aa | 1361 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
b6455c53 | 1362 | Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL) |
8aad04aa | 1363 | #else |
0a8e0eff | 1364 | Perl_csighandler(int sig) |
8aad04aa | 1365 | #endif |
0a8e0eff | 1366 | { |
1018e26f NIS |
1367 | #ifdef PERL_GET_SIG_CONTEXT |
1368 | dTHXa(PERL_GET_SIG_CONTEXT); | |
1369 | #else | |
85b332e2 CL |
1370 | dTHX; |
1371 | #endif | |
1271a1be | 1372 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
ffb6256b JH |
1373 | #if defined(__cplusplus) && defined(__GNUC__) |
1374 | /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap | |
1375 | * parameters would be warned about. */ | |
1376 | PERL_UNUSED_ARG(sip); | |
1377 | PERL_UNUSED_ARG(uap); | |
1378 | #endif | |
1271a1be | 1379 | #endif |
23ada85b | 1380 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
5c1546dc | 1381 | (void) rsignal(sig, PL_csighandlerp); |
27da23d5 | 1382 | if (PL_sig_ignoring[sig]) return; |
85b332e2 | 1383 | #endif |
2e34cc90 | 1384 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1385 | if (PL_sig_defaulting[sig]) |
2e34cc90 CL |
1386 | #ifdef KILL_BY_SIGPRC |
1387 | exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG); | |
1388 | #else | |
1389 | exit(1); | |
1390 | #endif | |
1391 | #endif | |
406878dd | 1392 | if ( |
853d2c32 RGS |
1393 | #ifdef SIGILL |
1394 | sig == SIGILL || | |
1395 | #endif | |
1396 | #ifdef SIGBUS | |
1397 | sig == SIGBUS || | |
1398 | #endif | |
1399 | #ifdef SIGSEGV | |
1400 | sig == SIGSEGV || | |
1401 | #endif | |
1402 | (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)) | |
4ffa73a3 | 1403 | /* Call the perl level handler now-- |
31c91b43 | 1404 | * with risk we may be in malloc() or being destructed etc. */ |
6e324d09 | 1405 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
80626cf1 | 1406 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 CB |
1407 | #else |
1408 | (*PL_sighandlerp)(sig); | |
92807b6d | 1409 | #endif |
406878dd | 1410 | else { |
31c91b43 | 1411 | if (!PL_psig_pend) return; |
406878dd GA |
1412 | /* Set a flag to say this signal is pending, that is awaiting delivery after |
1413 | * the current Perl opcode completes */ | |
1414 | PL_psig_pend[sig]++; | |
1415 | ||
1416 | #ifndef SIG_PENDING_DIE_COUNT | |
1417 | # define SIG_PENDING_DIE_COUNT 120 | |
1418 | #endif | |
fe13d51d | 1419 | /* Add one to say _a_ signal is pending */ |
406878dd GA |
1420 | if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT) |
1421 | Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded", | |
1422 | (unsigned long)SIG_PENDING_DIE_COUNT); | |
1423 | } | |
0a8e0eff NIS |
1424 | } |
1425 | ||
2e34cc90 CL |
1426 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
1427 | void | |
1428 | Perl_csighandler_init(void) | |
1429 | { | |
1430 | int sig; | |
27da23d5 | 1431 | if (PL_sig_handlers_initted) return; |
2e34cc90 CL |
1432 | |
1433 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1434 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS | |
218fdd94 | 1435 | dTHX; |
27da23d5 | 1436 | PL_sig_defaulting[sig] = 1; |
5c1546dc | 1437 | (void) rsignal(sig, PL_csighandlerp); |
2e34cc90 CL |
1438 | #endif |
1439 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS | |
27da23d5 | 1440 | PL_sig_ignoring[sig] = 0; |
2e34cc90 CL |
1441 | #endif |
1442 | } | |
27da23d5 | 1443 | PL_sig_handlers_initted = 1; |
2e34cc90 CL |
1444 | } |
1445 | #endif | |
1446 | ||
7fe50b8b LT |
1447 | #if defined HAS_SIGPROCMASK |
1448 | static void | |
1449 | unblock_sigmask(pTHX_ void* newset) | |
1450 | { | |
dc3bf405 | 1451 | PERL_UNUSED_CONTEXT; |
7fe50b8b LT |
1452 | sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL); |
1453 | } | |
1454 | #endif | |
1455 | ||
0a8e0eff NIS |
1456 | void |
1457 | Perl_despatch_signals(pTHX) | |
1458 | { | |
1459 | int sig; | |
1460 | PL_sig_pending = 0; | |
1461 | for (sig = 1; sig < SIG_SIZE; sig++) { | |
1462 | if (PL_psig_pend[sig]) { | |
d0166017 | 1463 | dSAVE_ERRNO; |
7fe50b8b | 1464 | #ifdef HAS_SIGPROCMASK |
55534442 LT |
1465 | /* From sigaction(2) (FreeBSD man page): |
1466 | * | Signal routines normally execute with the signal that | |
1467 | * | caused their invocation blocked, but other signals may | |
1468 | * | yet occur. | |
1469 | * Emulation of this behavior (from within Perl) is enabled | |
1470 | * using sigprocmask | |
1471 | */ | |
1472 | int was_blocked; | |
1473 | sigset_t newset, oldset; | |
1474 | ||
1475 | sigemptyset(&newset); | |
1476 | sigaddset(&newset, sig); | |
1477 | sigprocmask(SIG_BLOCK, &newset, &oldset); | |
1478 | was_blocked = sigismember(&oldset, sig); | |
7fe50b8b LT |
1479 | if (!was_blocked) { |
1480 | SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t)); | |
1481 | ENTER; | |
1482 | SAVEFREESV(save_sv); | |
1483 | SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv)); | |
1484 | } | |
55534442 | 1485 | #endif |
25da4428 | 1486 | PL_psig_pend[sig] = 0; |
6e324d09 | 1487 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
80626cf1 | 1488 | (*PL_sighandlerp)(sig, NULL, NULL); |
6e324d09 CB |
1489 | #else |
1490 | (*PL_sighandlerp)(sig); | |
92807b6d | 1491 | #endif |
7fe50b8b | 1492 | #ifdef HAS_SIGPROCMASK |
55534442 | 1493 | if (!was_blocked) |
7fe50b8b | 1494 | LEAVE; |
55534442 | 1495 | #endif |
d0166017 | 1496 | RESTORE_ERRNO; |
0a8e0eff NIS |
1497 | } |
1498 | } | |
1499 | } | |
1500 | ||
38a124f0 | 1501 | /* sv of NULL signifies that we're acting as magic_clearsig. */ |
85e6fe83 | 1502 | int |
864dbfa3 | 1503 | Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1504 | { |
27da23d5 | 1505 | dVAR; |
79072805 | 1506 | I32 i; |
cbbf8932 | 1507 | SV** svp = NULL; |
2d4fcd5e AJ |
1508 | /* Need to be careful with SvREFCNT_dec(), because that can have side |
1509 | * effects (due to closures). We must make sure that the new disposition | |
1510 | * is in place before it is called. | |
1511 | */ | |
cbbf8932 | 1512 | SV* to_dec = NULL; |
e72dc28c | 1513 | STRLEN len; |
2d4fcd5e AJ |
1514 | #ifdef HAS_SIGPROCMASK |
1515 | sigset_t set, save; | |
1516 | SV* save_sv; | |
1517 | #endif | |
eb578fdb | 1518 | const char *s = MgPV_const(mg,len); |
7918f24d NC |
1519 | |
1520 | PERL_ARGS_ASSERT_MAGIC_SETSIG; | |
1521 | ||
748a9306 | 1522 | if (*s == '_') { |
84c7b88c | 1523 | if (memEQs(s, len, "__DIE__")) |
3280af22 | 1524 | svp = &PL_diehook; |
84c7b88c | 1525 | else if (memEQs(s, len, "__WARN__") |
38a124f0 NC |
1526 | && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) { |
1527 | /* Merge the existing behaviours, which are as follows: | |
1528 | magic_setsig, we always set svp to &PL_warnhook | |
1529 | (hence we always change the warnings handler) | |
1530 | For magic_clearsig, we don't change the warnings handler if it's | |
1531 | set to the &PL_warnhook. */ | |
3280af22 | 1532 | svp = &PL_warnhook; |
84c7b88c BF |
1533 | } else if (sv) { |
1534 | SV *tmp = sv_newmortal(); | |
1535 | Perl_croak(aTHX_ "No such hook: %s", | |
1536 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1537 | } | |
748a9306 | 1538 | i = 0; |
38a124f0 | 1539 | if (svp && *svp) { |
9289f461 RGS |
1540 | if (*svp != PERL_WARNHOOK_FATAL) |
1541 | to_dec = *svp; | |
cbbf8932 | 1542 | *svp = NULL; |
4633a7c4 | 1543 | } |
748a9306 LW |
1544 | } |
1545 | else { | |
708854f2 NC |
1546 | i = (I16)mg->mg_private; |
1547 | if (!i) { | |
84c7b88c | 1548 | i = whichsig_pvn(s, len); /* ...no, a brick */ |
58a26b12 | 1549 | mg->mg_private = (U16)i; |
708854f2 | 1550 | } |
86d86cad | 1551 | if (i <= 0) { |
84c7b88c BF |
1552 | if (sv) { |
1553 | SV *tmp = sv_newmortal(); | |
1554 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", | |
1555 | pv_pretty(tmp, s, len, 0, NULL, NULL, 0)); | |
1556 | } | |
748a9306 LW |
1557 | return 0; |
1558 | } | |
2d4fcd5e AJ |
1559 | #ifdef HAS_SIGPROCMASK |
1560 | /* Avoid having the signal arrive at a bad time, if possible. */ | |
1561 | sigemptyset(&set); | |
1562 | sigaddset(&set,i); | |
1563 | sigprocmask(SIG_BLOCK, &set, &save); | |
1564 | ENTER; | |
9ff8e806 | 1565 | save_sv = newSVpvn((char *)(&save), sizeof(sigset_t)); |
2d4fcd5e AJ |
1566 | SAVEFREESV(save_sv); |
1567 | SAVEDESTRUCTOR_X(restore_sigmask, save_sv); | |
1568 | #endif | |
1569 | PERL_ASYNC_CHECK(); | |
2e34cc90 | 1570 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
27da23d5 | 1571 | if (!PL_sig_handlers_initted) Perl_csighandler_init(); |
2e34cc90 | 1572 | #endif |
23ada85b | 1573 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
27da23d5 | 1574 | PL_sig_ignoring[i] = 0; |
85b332e2 | 1575 | #endif |
2e34cc90 | 1576 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
27da23d5 | 1577 | PL_sig_defaulting[i] = 0; |
2e34cc90 | 1578 | #endif |
2d4fcd5e | 1579 | to_dec = PL_psig_ptr[i]; |
38a124f0 NC |
1580 | if (sv) { |
1581 | PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv); | |
1582 | SvTEMP_off(sv); /* Make sure it doesn't go away on us */ | |
79fd3822 NC |
1583 | |
1584 | /* Signals don't change name during the program's execution, so once | |
1585 | they're cached in the appropriate slot of PL_psig_name, they can | |
1586 | stay there. | |
1587 | ||
1588 | Ideally we'd find some way of making SVs at (C) compile time, or | |
1589 | at least, doing most of the work. */ | |
1590 | if (!PL_psig_name[i]) { | |
1591 | PL_psig_name[i] = newSVpvn(s, len); | |
1592 | SvREADONLY_on(PL_psig_name[i]); | |
1593 | } | |
38a124f0 | 1594 | } else { |
79fd3822 | 1595 | SvREFCNT_dec(PL_psig_name[i]); |
38a124f0 NC |
1596 | PL_psig_name[i] = NULL; |
1597 | PL_psig_ptr[i] = NULL; | |
1598 | } | |
748a9306 | 1599 | } |
38a124f0 | 1600 | if (sv && (isGV_with_GP(sv) || SvROK(sv))) { |
2d4fcd5e | 1601 | if (i) { |
5c1546dc | 1602 | (void)rsignal(i, PL_csighandlerp); |
2d4fcd5e | 1603 | } |
748a9306 | 1604 | else |
b37c2d43 | 1605 | *svp = SvREFCNT_inc_simple_NN(sv); |
38a124f0 | 1606 | } else { |
9dfa190b NC |
1607 | if (sv && SvOK(sv)) { |
1608 | s = SvPV_force(sv, len); | |
1609 | } else { | |
1610 | sv = NULL; | |
1611 | } | |
84c7b88c | 1612 | if (sv && memEQs(s, len,"IGNORE")) { |
9dfa190b | 1613 | if (i) { |
23ada85b | 1614 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
9dfa190b NC |
1615 | PL_sig_ignoring[i] = 1; |
1616 | (void)rsignal(i, PL_csighandlerp); | |
85b332e2 | 1617 | #else |
9dfa190b | 1618 | (void)rsignal(i, (Sighandler_t) SIG_IGN); |
85b332e2 | 1619 | #endif |
9dfa190b | 1620 | } |
2d4fcd5e | 1621 | } |
84c7b88c | 1622 | else if (!sv || memEQs(s, len,"DEFAULT") || !len) { |
9dfa190b | 1623 | if (i) { |
2e34cc90 | 1624 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
9dfa190b NC |
1625 | PL_sig_defaulting[i] = 1; |
1626 | (void)rsignal(i, PL_csighandlerp); | |
2e34cc90 | 1627 | #else |
9dfa190b | 1628 | (void)rsignal(i, (Sighandler_t) SIG_DFL); |
2e34cc90 | 1629 | #endif |
9dfa190b NC |
1630 | } |
1631 | } | |
1632 | else { | |
1633 | /* | |
1634 | * We should warn if HINT_STRICT_REFS, but without | |
1635 | * access to a known hint bit in a known OP, we can't | |
1636 | * tell whether HINT_STRICT_REFS is in force or not. | |
1637 | */ | |
1638 | if (!strchr(s,':') && !strchr(s,'\'')) | |
1639 | Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"), | |
1640 | SV_GMAGIC); | |
1641 | if (i) | |
1642 | (void)rsignal(i, PL_csighandlerp); | |
1643 | else | |
1644 | *svp = SvREFCNT_inc_simple_NN(sv); | |
136e0459 | 1645 | } |
748a9306 | 1646 | } |
9dfa190b | 1647 | |
2d4fcd5e AJ |
1648 | #ifdef HAS_SIGPROCMASK |
1649 | if(i) | |
1650 | LEAVE; | |
1651 | #endif | |
ef8d46e8 | 1652 | SvREFCNT_dec(to_dec); |
79072805 LW |
1653 | return 0; |
1654 | } | |
64ca3a65 | 1655 | #endif /* !PERL_MICRO */ |
79072805 LW |
1656 | |
1657 | int | |
864dbfa3 | 1658 | Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1659 | { |
7918f24d | 1660 | PERL_ARGS_ASSERT_MAGIC_SETISA; |
8772537c | 1661 | PERL_UNUSED_ARG(sv); |
e1a479c5 | 1662 | |
89c14e2e | 1663 | /* Skip _isaelem because _isa will handle it shortly */ |
354b0578 | 1664 | if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem) |
89c14e2e BB |
1665 | return 0; |
1666 | ||
0e446081 | 1667 | return magic_clearisa(NULL, mg); |
463ee0b2 LW |
1668 | } |
1669 | ||
0e446081 | 1670 | /* sv of NULL signifies that we're acting as magic_setisa. */ |
463ee0b2 | 1671 | int |
52b45067 RD |
1672 | Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg) |
1673 | { | |
52b45067 | 1674 | HV* stash; |
7918f24d NC |
1675 | PERL_ARGS_ASSERT_MAGIC_CLEARISA; |
1676 | ||
52b45067 | 1677 | /* Bail out if destruction is going on */ |
627364f1 | 1678 | if(PL_phase == PERL_PHASE_DESTRUCT) return 0; |
52b45067 | 1679 | |
0e446081 NC |
1680 | if (sv) |
1681 | av_clear(MUTABLE_AV(sv)); | |
52b45067 | 1682 | |
6624142a FC |
1683 | if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj)) |
1684 | /* This occurs with setisa_elem magic, which calls this | |
1685 | same function. */ | |
1686 | mg = mg_find(mg->mg_obj, PERL_MAGIC_isa); | |
1687 | ||
316ebaf2 | 1688 | assert(mg); |
6624142a FC |
1689 | if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */ |
1690 | SV **svp = AvARRAY((AV *)mg->mg_obj); | |
1691 | I32 items = AvFILLp((AV *)mg->mg_obj) + 1; | |
1692 | while (items--) { | |
1693 | stash = GvSTASH((GV *)*svp++); | |
1694 | if (stash && HvENAME(stash)) mro_isa_changed_in(stash); | |
1695 | } | |
1696 | ||
1697 | return 0; | |
1698 | } | |
1699 | ||
52b45067 | 1700 | stash = GvSTASH( |
6624142a | 1701 | (const GV *)mg->mg_obj |
52b45067 RD |
1702 | ); |
1703 | ||
00169e2c FC |
1704 | /* The stash may have been detached from the symbol table, so check its |
1705 | name before doing anything. */ | |
1706 | if (stash && HvENAME_get(stash)) | |
5562fa71 | 1707 | mro_isa_changed_in(stash); |
52b45067 RD |
1708 | |
1709 | return 0; | |
1710 | } | |
1711 | ||
1712 | int | |
864dbfa3 | 1713 | Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 1714 | { |
85fbaab2 | 1715 | HV * const hv = MUTABLE_HV(LvTARG(sv)); |
6ff81951 | 1716 | I32 i = 0; |
7918f24d NC |
1717 | |
1718 | PERL_ARGS_ASSERT_MAGIC_GETNKEYS; | |
8772537c | 1719 | PERL_UNUSED_ARG(mg); |
7719e241 | 1720 | |
6ff81951 | 1721 | if (hv) { |
497b47a8 | 1722 | (void) hv_iterinit(hv); |
ad64d0ec | 1723 | if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied)) |
1b95d04f | 1724 | i = HvUSEDKEYS(hv); |
497b47a8 JH |
1725 | else { |
1726 | while (hv_iternext(hv)) | |
1727 | i++; | |
1728 | } | |
6ff81951 GS |
1729 | } |
1730 | ||
1731 | sv_setiv(sv, (IV)i); | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | int | |
864dbfa3 | 1736 | Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg) |
946ec16e | 1737 | { |
7918f24d | 1738 | PERL_ARGS_ASSERT_MAGIC_SETNKEYS; |
8772537c | 1739 | PERL_UNUSED_ARG(mg); |
946ec16e | 1740 | if (LvTARG(sv)) { |
85fbaab2 | 1741 | hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv)); |
946ec16e PP |
1742 | } |
1743 | return 0; | |
ac27b0f5 | 1744 | } |
946ec16e | 1745 | |
efaf3674 DM |
1746 | /* |
1747 | =for apidoc magic_methcall | |
1748 | ||
1749 | Invoke a magic method (like FETCH). | |
1750 | ||
2baee27b FC |
1751 | C<sv> and C<mg> are the tied thingy and the tie magic. |
1752 | ||
1753 | C<meth> is the name of the method to call. | |
1754 | ||
1755 | C<argc> is the number of args (in addition to $self) to pass to the method. | |
1756 | ||
1757 | The C<flags> can be: | |
1758 | ||
1759 | G_DISCARD invoke method with G_DISCARD flag and don't | |
1760 | return a value | |
1761 | G_UNDEF_FILL fill the stack with argc pointers to | |
1762 | PL_sv_undef | |
1763 | ||
1764 | The arguments themselves are any values following the C<flags> argument. | |
efaf3674 | 1765 | |
796b6530 | 1766 | Returns the SV (if any) returned by the method, or C<NULL> on failure. |
efaf3674 DM |
1767 | |
1768 | ||
1769 | =cut | |
1770 | */ | |
1771 | ||
1772 | SV* | |
36925d9e | 1773 | Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
046b0c7d | 1774 | U32 argc, ...) |
a0d0e21e LW |
1775 | { |
1776 | dSP; | |
efaf3674 | 1777 | SV* ret = NULL; |
463ee0b2 | 1778 | |
7918f24d NC |
1779 | PERL_ARGS_ASSERT_MAGIC_METHCALL; |
1780 | ||
efaf3674 | 1781 | ENTER; |
d1d7a15d NC |
1782 | |
1783 | if (flags & G_WRITING_TO_STDERR) { | |
1784 | SAVETMPS; | |
1785 | ||
2782061f | 1786 | save_re_context(); |
d1d7a15d NC |
1787 | SAVESPTR(PL_stderrgv); |
1788 | PL_stderrgv = NULL; | |
1789 | } | |
1790 | ||
efaf3674 | 1791 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 1792 | PUSHMARK(SP); |
efaf3674 | 1793 | |
052a7c76 DM |
1794 | /* EXTEND() expects a signed argc; don't wrap when casting */ |
1795 | assert(argc <= I32_MAX); | |
1796 | EXTEND(SP, (I32)argc+1); | |
67549bd2 NC |
1797 | PUSHs(SvTIED_obj(sv, mg)); |
1798 | if (flags & G_UNDEF_FILL) { | |
1799 | while (argc--) { | |
efaf3674 | 1800 | PUSHs(&PL_sv_undef); |
93965878 | 1801 | } |
67549bd2 | 1802 | } else if (argc > 0) { |
046b0c7d NC |
1803 | va_list args; |
1804 | va_start(args, argc); | |
1805 | ||
1806 | do { | |
1807 | SV *const sv = va_arg(args, SV *); | |
1808 | PUSHs(sv); | |
1809 | } while (--argc); | |
1810 | ||
1811 | va_end(args); | |
88e89b8a | 1812 | } |
463ee0b2 | 1813 | PUTBACK; |
efaf3674 | 1814 | if (flags & G_DISCARD) { |
36925d9e | 1815 | call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED); |
efaf3674 DM |
1816 | } |
1817 | else { | |
36925d9e | 1818 | if (call_sv(meth, G_SCALAR|G_METHOD_NAMED)) |
efaf3674 DM |
1819 | ret = *PL_stack_sp--; |
1820 | } | |
1821 | POPSTACK; | |
d1d7a15d NC |
1822 | if (flags & G_WRITING_TO_STDERR) |
1823 | FREETMPS; | |
efaf3674 DM |
1824 | LEAVE; |
1825 | return ret; | |
1826 | } | |
1827 | ||
efaf3674 | 1828 | /* wrapper for magic_methcall that creates the first arg */ |
463ee0b2 | 1829 | |
efaf3674 | 1830 | STATIC SV* |
36925d9e | 1831 | S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags, |
efaf3674 DM |
1832 | int n, SV *val) |
1833 | { | |
efaf3674 DM |
1834 | SV* arg1 = NULL; |
1835 | ||
1836 | PERL_ARGS_ASSERT_MAGIC_METHCALL1; | |
1837 | ||
1838 | if (mg->mg_ptr) { | |
1839 | if (mg->mg_len >= 0) { | |
db4b3a1d | 1840 | arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
efaf3674 DM |
1841 | } |
1842 | else if (mg->mg_len == HEf_SVKEY) | |
1843 | arg1 = MUTABLE_SV(mg->mg_ptr); | |
1844 | } | |
1845 | else if (mg->mg_type == PERL_MAGIC_tiedelem) { | |
db4b3a1d | 1846 | arg1 = newSViv((IV)(mg->mg_len)); |
efaf3674 DM |
1847 | sv_2mortal(arg1); |
1848 | } | |
1849 | if (!arg1) { | |
046b0c7d | 1850 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val); |
efaf3674 | 1851 | } |
046b0c7d | 1852 | return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val); |
946ec16e PP |
1853 | } |
1854 | ||
76e3520e | 1855 | STATIC int |
36925d9e | 1856 | S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth) |
a0d0e21e | 1857 | { |
efaf3674 | 1858 | SV* ret; |
463ee0b2 | 1859 | |
7918f24d NC |
1860 | PERL_ARGS_ASSERT_MAGIC_METHPACK; |
1861 | ||
efaf3674 DM |
1862 | ret = magic_methcall1(sv, mg, meth, 0, 1, NULL); |
1863 | if (ret) | |
1864 | sv_setsv(sv, ret); | |
a0d0e21e LW |
1865 | return 0; |
1866 | } | |
463ee0b2 | 1867 | |
a0d0e21e | 1868 | int |
864dbfa3 | 1869 | Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 1870 | { |
7918f24d NC |
1871 | PERL_ARGS_ASSERT_MAGIC_GETPACK; |
1872 | ||
fd69380d | 1873 | if (mg->mg_type == PERL_MAGIC_tiedelem) |
a0d0e21e | 1874 | mg->mg_flags |= MGf_GSKIP; |
36925d9e | 1875 | magic_methpack(sv,mg,SV_CONST(FETCH)); |
463ee0b2 LW |
1876 | return 0; |
1877 | } | |
1878 | ||
1879 | int | |
864dbfa3 | 1880 | Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg) |
e336de0d | 1881 | { |
b112cff9 DM |
1882 | MAGIC *tmg; |
1883 | SV *val; | |
7918f24d NC |
1884 | |
1885 | PERL_ARGS_ASSERT_MAGIC_SETPACK; | |
1886 | ||
b112cff9 DM |
1887 | /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to |
1888 | * STORE() is not $val, but rather a PVLV (the sv in this call), whose | |
1889 | * public flags indicate its value based on copying from $val. Doing | |
1890 | * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us. | |
1891 | * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes | |
1892 | * wrong if $val happened to be tainted, as sv hasn't got magic | |
1893 | * enabled, even though taint magic is in the chain. In which case, | |
1894 | * fake up a temporary tainted value (this is easier than temporarily | |
1895 | * re-enabling magic on sv). */ | |
1896 | ||
284167a5 | 1897 | if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint)) |
b112cff9 DM |
1898 | && (tmg->mg_len & 1)) |
1899 | { | |
1900 | val = sv_mortalcopy(sv); | |
1901 | SvTAINTED_on(val); | |
1902 | } | |
1903 | else | |
1904 | val = sv; | |
1905 | ||
36925d9e | 1906 | magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val); |
463ee0b2 LW |
1907 | return 0; |
1908 | } | |
1909 | ||
1910 | int | |
864dbfa3 | 1911 | Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 1912 | { |
7918f24d NC |
1913 | PERL_ARGS_ASSERT_MAGIC_CLEARPACK; |
1914 | ||
4c13be3f | 1915 | if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0; |
36925d9e | 1916 | return magic_methpack(sv,mg,SV_CONST(DELETE)); |
a0d0e21e | 1917 | } |
463ee0b2 | 1918 | |
93965878 NIS |
1919 | |
1920 | U32 | |
864dbfa3 | 1921 | Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg) |
ac27b0f5 | 1922 | { |
22846ab4 | 1923 | I32 retval = 0; |
efaf3674 | 1924 | SV* retsv; |
93965878 | 1925 | |
7918f24d NC |
1926 | PERL_ARGS_ASSERT_MAGIC_SIZEPACK; |
1927 | ||
36925d9e | 1928 | retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL); |
efaf3674 DM |
1929 | if (retsv) { |
1930 | retval = SvIV(retsv)-1; | |
22846ab4 AB |
1931 | if (retval < -1) |
1932 | Perl_croak(aTHX_ "FETCHSIZE returned a negative value"); | |
93965878 | 1933 | } |
22846ab4 | 1934 | return (U32) retval; |
93965878 NIS |
1935 | } |
1936 | ||
cea2e8a9 GS |
1937 | int |
1938 | Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg) | |
a0d0e21e | 1939 | { |
7918f24d NC |
1940 | PERL_ARGS_ASSERT_MAGIC_WIPEPACK; |
1941 | ||
36925d9e | 1942 | Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0); |
463ee0b2 LW |
1943 | return 0; |
1944 | } | |
1945 | ||
1946 | int | |
864dbfa3 | 1947 | Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key) |
463ee0b2 | 1948 | { |
efaf3674 | 1949 | SV* ret; |
463ee0b2 | 1950 | |
7918f24d NC |
1951 | PERL_ARGS_ASSERT_MAGIC_NEXTPACK; |
1952 | ||
36925d9e RZ |
1953 | ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key) |
1954 | : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0); | |
efaf3674 DM |
1955 | if (ret) |
1956 | sv_setsv(key,ret); | |
79072805 LW |
1957 | return 0; |
1958 | } | |
1959 | ||
1960 | int | |
1146e912 | 1961 | Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg) |
a0d0e21e | 1962 | { |
7918f24d NC |
1963 | PERL_ARGS_ASSERT_MAGIC_EXISTSPACK; |
1964 | ||
36925d9e | 1965 | return magic_methpack(sv,mg,SV_CONST(EXISTS)); |
ac27b0f5 | 1966 | } |
a0d0e21e | 1967 | |
a3bcc51e TP |
1968 | SV * |
1969 | Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg) | |
1970 | { | |
5fcbf73d | 1971 | SV *retval; |
ad64d0ec NC |
1972 | SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg); |
1973 | HV * const pkg = SvSTASH((const SV *)SvRV(tied)); | |
a3bcc51e | 1974 | |
7918f24d NC |
1975 | PERL_ARGS_ASSERT_MAGIC_SCALARPACK; |
1976 | ||
a3bcc51e TP |
1977 | if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) { |
1978 | SV *key; | |
bfcb3514 | 1979 | if (HvEITER_get(hv)) |
a3bcc51e TP |
1980 | /* we are in an iteration so the hash cannot be empty */ |
1981 | return &PL_sv_yes; | |
1982 | /* no xhv_eiter so now use FIRSTKEY */ | |
1983 | key = sv_newmortal(); | |
ad64d0ec | 1984 | magic_nextpack(MUTABLE_SV(hv), mg, key); |
bfcb3514 | 1985 | HvEITER_set(hv, NULL); /* need to reset iterator */ |
a3bcc51e TP |
1986 | return SvOK(key) ? &PL_sv_yes : &PL_sv_no; |
1987 | } | |
1988 | ||
1989 | /* there is a SCALAR method that we can call */ | |
36925d9e | 1990 | retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0); |
efaf3674 | 1991 | if (!retval) |
5fcbf73d | 1992 | retval = &PL_sv_undef; |
a3bcc51e TP |
1993 | return retval; |
1994 | } | |
1995 | ||
a0d0e21e | 1996 | int |
864dbfa3 | 1997 | Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 1998 | { |
089b5c60 | 1999 | SV **svp; |
7918f24d NC |
2000 | |
2001 | PERL_ARGS_ASSERT_MAGIC_SETDBLINE; | |
2002 | ||
089b5c60 NC |
2003 | /* The magic ptr/len for the debugger's hash should always be an SV. */ |
2004 | if (UNLIKELY(mg->mg_len != HEf_SVKEY)) { | |
2005 | Perl_croak(aTHX_ "panic: magic_setdbline len=%"IVdf", ptr='%s'", | |
7b0eb0b8 | 2006 | (IV)mg->mg_len, mg->mg_ptr); |
089b5c60 NC |
2007 | } |
2008 | ||
2009 | /* Use sv_2iv instead of SvIV() as the former generates smaller code, and | |
2010 | setting/clearing debugger breakpoints is not a hot path. */ | |
43e4250a FC |
2011 | svp = av_fetch(MUTABLE_AV(mg->mg_obj), |
2012 | sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE); | |
089b5c60 | 2013 | |
8772537c | 2014 | if (svp && SvIOKp(*svp)) { |
88df5f01 FC |
2015 | OP * const o = INT2PTR(OP*,SvIVX(*svp)); |
2016 | if (o) { | |
2017 | #ifdef PERL_DEBUG_READONLY_OPS | |
2018 | Slab_to_rw(OpSLAB(o)); | |
2019 | #endif | |
2020 | /* set or clear breakpoint in the relevant control op */ | |
089b5c60 | 2021 | if (SvTRUE(sv)) |
88df5f01 | 2022 | o->op_flags |= OPf_SPECIAL; |
8772537c | 2023 | else |
88df5f01 FC |
2024 | o->op_flags &= ~OPf_SPECIAL; |
2025 | #ifdef PERL_DEBUG_READONLY_OPS | |
2026 | Slab_to_ro(OpSLAB(o)); | |
2027 | #endif | |
8772537c | 2028 | } |
5df8de69 | 2029 | } |
79072805 LW |
2030 | return 0; |
2031 | } | |
2032 | ||
2033 | int | |
8772537c | 2034 | Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg) |
79072805 | 2035 | { |
502c6561 | 2036 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2037 | |
2038 | PERL_ARGS_ASSERT_MAGIC_GETARYLEN; | |
2039 | ||
83bf042f | 2040 | if (obj) { |
e1dccc0d | 2041 | sv_setiv(sv, AvFILL(obj)); |
83bf042f | 2042 | } else { |
d4a823b3 | 2043 | sv_setsv(sv, NULL); |
83bf042f | 2044 | } |
79072805 LW |
2045 | return 0; |
2046 | } | |
2047 | ||
2048 | int | |
864dbfa3 | 2049 | Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2050 | { |
502c6561 | 2051 | AV * const obj = MUTABLE_AV(mg->mg_obj); |
7918f24d NC |
2052 | |
2053 | PERL_ARGS_ASSERT_MAGIC_SETARYLEN; | |
2054 | ||
83bf042f | 2055 | if (obj) { |
e1dccc0d | 2056 | av_fill(obj, SvIV(sv)); |
83bf042f | 2057 | } else { |
a2a5de95 NC |
2058 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
2059 | "Attempt to set length of freed array"); | |
83bf042f NC |
2060 | } |
2061 | return 0; | |
2062 | } | |
2063 | ||
2064 | int | |
83f29afa VP |
2065 | Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg) |
2066 | { | |
83f29afa VP |
2067 | PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P; |
2068 | PERL_UNUSED_ARG(sv); | |
dc3bf405 | 2069 | PERL_UNUSED_CONTEXT; |
83f29afa VP |
2070 | |
2071 | /* Reset the iterator when the array is cleared */ | |
3565fbf3 VP |
2072 | #if IVSIZE == I32SIZE |
2073 | *((IV *) &(mg->mg_len)) = 0; | |
2074 | #else | |
83f29afa VP |
2075 | if (mg->mg_ptr) |
2076 | *((IV *) mg->mg_ptr) = 0; | |
3565fbf3 | 2077 | #endif |
83f29afa VP |
2078 | |
2079 | return 0; | |
2080 | } | |
2081 | ||
2082 | int | |
83bf042f NC |
2083 | Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg) |
2084 | { | |
7918f24d | 2085 | PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P; |
53c1dcc0 | 2086 | PERL_UNUSED_ARG(sv); |
7918f24d | 2087 | |
94f3782b DM |
2088 | /* during global destruction, mg_obj may already have been freed */ |
2089 | if (PL_in_clean_all) | |
1ea47f64 | 2090 | return 0; |
94f3782b | 2091 | |
83bf042f NC |
2092 | mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen); |
2093 | ||
2094 | if (mg) { | |
2095 | /* arylen scalar holds a pointer back to the array, but doesn't own a | |
2096 | reference. Hence the we (the array) are about to go away with it | |
2097 | still pointing at us. Clear its pointer, else it would be pointing | |
2098 | at free memory. See the comment in sv_magic about reference loops, | |
2099 | and why it can't own a reference to us. */ | |
2100 | mg->mg_obj = 0; | |
2101 | } | |
a0d0e21e LW |
2102 | return 0; |
2103 | } | |
2104 | ||
2105 | int | |
864dbfa3 | 2106 | Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2107 | { |
16eb5365 | 2108 | SV* const lsv = LvTARG(sv); |
96c2a8ff | 2109 | MAGIC * const found = mg_find_mglob(lsv); |
7918f24d NC |
2110 | |
2111 | PERL_ARGS_ASSERT_MAGIC_GETPOS; | |
16eb5365 | 2112 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2113 | |
6174b39a FC |
2114 | if (found && found->mg_len != -1) { |
2115 | STRLEN i = found->mg_len; | |
25fdce4a | 2116 | if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv)) |
6174b39a FC |
2117 | i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN); |
2118 | sv_setuv(sv, i); | |
a0d0e21e | 2119 | return 0; |
a0d0e21e | 2120 | } |
35995e5c | 2121 | sv_setsv(sv,NULL); |
a0d0e21e LW |
2122 | return 0; |
2123 | } | |
2124 | ||
2125 | int | |
864dbfa3 | 2126 | Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg) |
a0d0e21e | 2127 | { |
16eb5365 | 2128 | SV* const lsv = LvTARG(sv); |
a0d0e21e LW |
2129 | SSize_t pos; |
2130 | STRLEN len; | |
c00206c8 | 2131 | STRLEN ulen = 0; |
53d44271 | 2132 | MAGIC* found; |
aec43834 | 2133 | const char *s; |
a0d0e21e | 2134 | |
7918f24d | 2135 | PERL_ARGS_ASSERT_MAGIC_SETPOS; |
16eb5365 | 2136 | PERL_UNUSED_ARG(mg); |
ac27b0f5 | 2137 | |
96c2a8ff | 2138 | found = mg_find_mglob(lsv); |
3881461a | 2139 | if (!found) { |
a0d0e21e LW |
2140 | if (!SvOK(sv)) |
2141 | return 0; | |
96c2a8ff | 2142 | found = sv_magicext_mglob(lsv); |
a0d0e21e LW |
2143 | } |
2144 | else if (!SvOK(sv)) { | |
3881461a | 2145 | found->mg_len = -1; |
a0d0e21e LW |
2146 | return 0; |
2147 | } | |
aec43834 | 2148 | s = SvPV_const(lsv, len); |
a0d0e21e | 2149 | |
e1dccc0d | 2150 | pos = SvIV(sv); |
a0ed51b3 | 2151 | |
7e2040f0 | 2152 | if (DO_UTF8(lsv)) { |
aec43834 | 2153 | ulen = sv_or_pv_len_utf8(lsv, s, len); |
a0ed51b3 LW |
2154 | if (ulen) |
2155 | len = ulen; | |
a0ed51b3 LW |
2156 | } |
2157 | ||
a0d0e21e LW |
2158 | if (pos < 0) { |
2159 | pos += len; | |
2160 | if (pos < 0) | |
2161 | pos = 0; | |
2162 | } | |
eb160463 | 2163 | else if (pos > (SSize_t)len) |
a0d0e21e | 2164 | pos = len; |
a0ed51b3 | 2165 | |
3881461a | 2166 | found->mg_len = pos; |
25fdce4a | 2167 | found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES); |
a0d0e21e | 2168 | |
79072805 LW |
2169 | return 0; |
2170 | } | |
2171 | ||
2172 | int | |
864dbfa3 | 2173 | Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 GS |
2174 | { |
2175 | STRLEN len; | |
35a4481c | 2176 | SV * const lsv = LvTARG(sv); |
b83604b4 | 2177 | const char * const tmps = SvPV_const(lsv,len); |
777f7c56 EB |
2178 | STRLEN offs = LvTARGOFF(sv); |
2179 | STRLEN rem = LvTARGLEN(sv); | |
83f78d1a FC |
2180 | const bool negoff = LvFLAGS(sv) & 1; |
2181 | const bool negrem = LvFLAGS(sv) & 2; | |
7918f24d NC |
2182 | |
2183 | PERL_ARGS_ASSERT_MAGIC_GETSUBSTR; | |
8772537c | 2184 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2185 | |
83f78d1a | 2186 | if (!translate_substr_offsets( |
4ddea69a | 2187 | SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len, |
83f78d1a FC |
2188 | negoff ? -(IV)offs : (IV)offs, !negoff, |
2189 | negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem | |
2190 | )) { | |
2191 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); | |
2192 | sv_setsv_nomg(sv, &PL_sv_undef); | |
2193 | return 0; | |
2194 | } | |
2195 | ||
9aa983d2 | 2196 | if (SvUTF8(lsv)) |
4ddea69a | 2197 | offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem); |
1c900557 | 2198 | sv_setpvn(sv, tmps + offs, rem); |
9aa983d2 | 2199 | if (SvUTF8(lsv)) |
2ef4b674 | 2200 | SvUTF8_on(sv); |
6ff81951 GS |
2201 | return 0; |
2202 | } | |
2203 | ||
2204 | int | |
864dbfa3 | 2205 | Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2206 | { |
83f78d1a | 2207 | STRLEN len, lsv_len, oldtarglen, newtarglen; |
5fcbf73d | 2208 | const char * const tmps = SvPV_const(sv, len); |
dd374669 | 2209 | SV * const lsv = LvTARG(sv); |
777f7c56 EB |
2210 | STRLEN lvoff = LvTARGOFF(sv); |
2211 | STRLEN lvlen = LvTARGLEN(sv); | |
83f78d1a FC |
2212 | const bool negoff = LvFLAGS(sv) & 1; |
2213 | const bool neglen = LvFLAGS(sv) & 2; | |
7918f24d NC |
2214 | |
2215 | PERL_ARGS_ASSERT_MAGIC_SETSUBSTR; | |
8772537c | 2216 | PERL_UNUSED_ARG(mg); |
075a4a2b | 2217 | |
a74fb2cd FC |
2218 | SvGETMAGIC(lsv); |
2219 | if (SvROK(lsv)) | |
2220 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), | |
2221 | "Attempt to use reference as lvalue in substr" | |
2222 | ); | |
fc061ed8 FC |
2223 | SvPV_force_nomg(lsv,lsv_len); |
2224 | if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv); | |
83f78d1a FC |
2225 | if (!translate_substr_offsets( |
2226 | lsv_len, | |
2227 | negoff ? -(IV)lvoff : (IV)lvoff, !negoff, | |
2228 | neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen | |
2229 | )) | |
2230 | Perl_croak(aTHX_ "substr outside of string"); | |
2231 | oldtarglen = lvlen; | |
1aa99e6b | 2232 | if (DO_UTF8(sv)) { |
73a087f0 | 2233 | sv_utf8_upgrade_nomg(lsv); |
d931b1be | 2234 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
a74fb2cd | 2235 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
7a385470 | 2236 | newtarglen = sv_or_pv_len_utf8(sv, tmps, len); |
9aa983d2 JH |
2237 | SvUTF8_on(lsv); |
2238 | } | |
0d336106 | 2239 | else if (SvUTF8(lsv)) { |
5fcbf73d | 2240 | const char *utf8; |
d931b1be | 2241 | lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN); |
83f78d1a | 2242 | newtarglen = len; |
5fcbf73d | 2243 | utf8 = (char*)bytes_to_utf8((U8*)tmps, &len); |
a74fb2cd | 2244 | sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0); |
5fcbf73d | 2245 | Safefree(utf8); |
1aa99e6b | 2246 | } |
b76f3ce2 | 2247 | else { |
a74fb2cd | 2248 | sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0); |
83f78d1a | 2249 | newtarglen = len; |
b76f3ce2 | 2250 | } |
83f78d1a FC |
2251 | if (!neglen) LvTARGLEN(sv) = newtarglen; |
2252 | if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen; | |
b76f3ce2 | 2253 | |
79072805 LW |
2254 | return 0; |
2255 | } | |
2256 | ||
2257 | int | |
864dbfa3 | 2258 | Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2259 | { |
7918f24d | 2260 | PERL_ARGS_ASSERT_MAGIC_GETTAINT; |
8772537c | 2261 | PERL_UNUSED_ARG(sv); |
9a9b5ec9 DM |
2262 | #ifdef NO_TAINT_SUPPORT |
2263 | PERL_UNUSED_ARG(mg); | |
2264 | #endif | |
7918f24d | 2265 | |
64ff300b | 2266 | TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME); |
463ee0b2 LW |
2267 | return 0; |
2268 | } | |
2269 | ||
2270 | int | |
864dbfa3 | 2271 | Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg) |
463ee0b2 | 2272 | { |
7918f24d | 2273 | PERL_ARGS_ASSERT_MAGIC_SETTAINT; |
8772537c | 2274 | PERL_UNUSED_ARG(sv); |
7918f24d | 2275 | |
b01e650a | 2276 | /* update taint status */ |
284167a5 | 2277 | if (TAINT_get) |
b01e650a DM |
2278 | mg->mg_len |= 1; |
2279 | else | |
2280 | mg->mg_len &= ~1; | |
463ee0b2 LW |
2281 | return 0; |
2282 | } | |
2283 | ||
2284 | int | |
864dbfa3 | 2285 | Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg) |
6ff81951 | 2286 | { |
35a4481c | 2287 | SV * const lsv = LvTARG(sv); |
7918f24d NC |
2288 | |
2289 | PERL_ARGS_ASSERT_MAGIC_GETVEC; | |
8772537c | 2290 | PERL_UNUSED_ARG(mg); |
6ff81951 | 2291 | |
2e9e14dd | 2292 | sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv))); |
6ff81951 | 2293 | |
6ff81951 GS |
2294 | return 0; |
2295 | } | |
2296 | ||
2297 | int | |
864dbfa3 | 2298 | Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2299 | { |
7918f24d | 2300 | PERL_ARGS_ASSERT_MAGIC_SETVEC; |
8772537c | 2301 | PERL_UNUSED_ARG(mg); |
79072805 LW |
2302 | do_vecset(sv); /* XXX slurp this routine */ |
2303 | return 0; | |
2304 | } | |
2305 | ||
13733cde FC |
2306 | SV * |
2307 | Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg) | |
5f05dabc | 2308 | { |
a0714e2c | 2309 | SV *targ = NULL; |
13733cde FC |
2310 | PERL_ARGS_ASSERT_DEFELEM_TARGET; |
2311 | if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem); | |
2312 | assert(mg); | |
5f05dabc | 2313 | if (LvTARGLEN(sv)) { |
68dc0745 | 2314 | if (mg->mg_obj) { |
8772537c | 2315 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2316 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0); |
6d822dc4 MS |
2317 | if (he) |
2318 | targ = HeVAL(he); | |
68dc0745 | 2319 | } |
bbfdc870 | 2320 | else if (LvSTARGOFF(sv) >= 0) { |
502c6561 | 2321 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2322 | if (LvSTARGOFF(sv) <= AvFILL(av)) |
ca58dfd9 FC |
2323 | { |
2324 | if (SvRMAGICAL(av)) { | |
2325 | SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0); | |
2326 | targ = svp ? *svp : NULL; | |
2327 | } | |
2328 | else | |
bbfdc870 | 2329 | targ = AvARRAY(av)[LvSTARGOFF(sv)]; |
ca58dfd9 | 2330 | } |
68dc0745 | 2331 | } |
46da273f | 2332 | if (targ && (targ != &PL_sv_undef)) { |
68dc0745 PP |
2333 | /* somebody else defined it for us */ |
2334 | SvREFCNT_dec(LvTARG(sv)); | |
b37c2d43 | 2335 | LvTARG(sv) = SvREFCNT_inc_simple_NN(targ); |
68dc0745 PP |
2336 | LvTARGLEN(sv) = 0; |
2337 | SvREFCNT_dec(mg->mg_obj); | |
a0714e2c | 2338 | mg->mg_obj = NULL; |
68dc0745 PP |
2339 | mg->mg_flags &= ~MGf_REFCOUNTED; |
2340 | } | |
13733cde | 2341 | return targ; |
5f05dabc | 2342 | } |
71be2cbc | 2343 | else |
13733cde FC |
2344 | return LvTARG(sv); |
2345 | } | |
2346 | ||
2347 | int | |
2348 | Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg) | |
2349 | { | |
2350 | PERL_ARGS_ASSERT_MAGIC_GETDEFELEM; | |
2351 | ||
2352 | sv_setsv(sv, defelem_target(sv, mg)); | |
71be2cbc PP |
2353 | return 0; |
2354 | } | |
2355 | ||
2356 | int | |
864dbfa3 | 2357 | Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg) |
71be2cbc | 2358 | { |
7918f24d | 2359 | PERL_ARGS_ASSERT_MAGIC_SETDEFELEM; |
8772537c | 2360 | PERL_UNUSED_ARG(mg); |
71be2cbc | 2361 | if (LvTARGLEN(sv)) |
68dc0745 PP |
2362 | vivify_defelem(sv); |
2363 | if (LvTARG(sv)) { | |
5f05dabc | 2364 | sv_setsv(LvTARG(sv), sv); |
68dc0745 PP |
2365 | SvSETMAGIC(LvTARG(sv)); |
2366 | } | |
5f05dabc PP |
2367 | return 0; |
2368 | } | |
2369 | ||
71be2cbc | 2370 | void |
864dbfa3 | 2371 | Perl_vivify_defelem(pTHX_ SV *sv) |
71be2cbc | 2372 | { |
74e13ce4 | 2373 | MAGIC *mg; |
a0714e2c | 2374 | SV *value = NULL; |
71be2cbc | 2375 | |
7918f24d NC |
2376 | PERL_ARGS_ASSERT_VIVIFY_DEFELEM; |
2377 | ||
14befaf4 | 2378 | if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem))) |
71be2cbc | 2379 | return; |
68dc0745 | 2380 | if (mg->mg_obj) { |
8772537c | 2381 | SV * const ahv = LvTARG(sv); |
85fbaab2 | 2382 | HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0); |
6d822dc4 MS |
2383 | if (he) |
2384 | value = HeVAL(he); | |
3280af22 | 2385 | if (!value || value == &PL_sv_undef) |
be2597df | 2386 | Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj)); |
71be2cbc | 2387 | } |
bbfdc870 FC |
2388 | else if (LvSTARGOFF(sv) < 0) |
2389 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); | |
68dc0745 | 2390 | else { |
502c6561 | 2391 | AV *const av = MUTABLE_AV(LvTARG(sv)); |
bbfdc870 | 2392 | if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av)) |
a0714e2c | 2393 | LvTARG(sv) = NULL; /* array can't be extended */ |
68dc0745 | 2394 | else { |
bbfdc870 | 2395 | SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE); |
031c6d82 | 2396 | if (!svp || !(value = *svp)) |
bbfdc870 | 2397 | Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv)); |
68dc0745 PP |
2398 | } |
2399 | } | |
b37c2d43 | 2400 | SvREFCNT_inc_simple_void(value); |
68dc0745 PP |
2401 | SvREFCNT_dec(LvTARG(sv)); |
2402 | LvTARG(sv) = value; | |
71be2cbc | 2403 | LvTARGLEN(sv) = 0; |
68dc0745 | 2404 | SvREFCNT_dec(mg->mg_obj); |
a0714e2c | 2405 | mg->mg_obj = NULL; |
68dc0745 | 2406 | mg->mg_flags &= ~MGf_REFCOUNTED; |
5f05dabc PP |
2407 | } |
2408 | ||
2409 | int | |
864dbfa3 | 2410 | Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg) |
810b8aa5 | 2411 | { |
7918f24d | 2412 | PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS; |
5648c0ae DM |
2413 | Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj)); |
2414 | return 0; | |
810b8aa5 GS |
2415 | } |
2416 | ||
2417 | int | |
864dbfa3 | 2418 | Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg) |
93a17b20 | 2419 | { |
7918f24d | 2420 | PERL_ARGS_ASSERT_MAGIC_SETMGLOB; |
96a5add6 | 2421 | PERL_UNUSED_CONTEXT; |
0177730e | 2422 | PERL_UNUSED_ARG(sv); |
565764a8 | 2423 | mg->mg_len = -1; |
93a17b20 LW |
2424 | return 0; |
2425 | } | |
2426 | ||
2427 | int | |
864dbfa3 | 2428 | Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2429 | { |
35a4481c | 2430 | const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr; |
79072805 | 2431 | |
7918f24d NC |
2432 | PERL_ARGS_ASSERT_MAGIC_SETUVAR; |
2433 | ||
79072805 | 2434 | if (uf && uf->uf_set) |
24f81a43 | 2435 | (*uf->uf_set)(aTHX_ uf->uf_index, sv); |
79072805 LW |
2436 | return 0; |
2437 | } | |
2438 | ||
c277df42 | 2439 | int |
faf82a0b AE |
2440 | Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg) |
2441 | { | |
488344d2 | 2442 | const char type = mg->mg_type; |
7918f24d NC |
2443 | |
2444 | PERL_ARGS_ASSERT_MAGIC_SETREGEXP; | |
2445 | ||
488344d2 NC |
2446 | if (type == PERL_MAGIC_qr) { |
2447 | } else if (type == PERL_MAGIC_bm) { | |
488344d2 NC |
2448 | SvVALID_off(sv); |
2449 | } else { | |
2450 | assert(type == PERL_MAGIC_fm); | |
488344d2 NC |
2451 | } |
2452 | return sv_unmagic(sv, type); | |
faf82a0b AE |
2453 | } |
2454 | ||
7a4c00b4 | 2455 | #ifdef USE_LOCALE_COLLATE |
79072805 | 2456 | int |
864dbfa3 | 2457 | Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg) |
bbce6d69 | 2458 | { |
7918f24d NC |
2459 | PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM; |
2460 | ||
bbce6d69 | 2461 | /* |
838b5b74 | 2462 | * RenE<eacute> Descartes said "I think not." |
bbce6d69 PP |
2463 | * and vanished with a faint plop. |
2464 | */ | |
96a5add6 | 2465 | PERL_UNUSED_CONTEXT; |
8772537c | 2466 | PERL_UNUSED_ARG(sv); |
7a4c00b4 PP |
2467 | if (mg->mg_ptr) { |
2468 | Safefree(mg->mg_ptr); | |
2469 | mg->mg_ptr = NULL; | |
565764a8 | 2470 | mg->mg_len = -1; |
7a4c00b4 | 2471 | } |
bbce6d69 PP |
2472 | return 0; |
2473 | } | |
7a4c00b4 | 2474 | #endif /* USE_LOCALE_COLLATE */ |
bbce6d69 | 2475 | |
7e8c5dac HS |
2476 | /* Just clear the UTF-8 cache data. */ |
2477 | int | |
2478 | Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg) | |
2479 | { | |
7918f24d | 2480 | PERL_ARGS_ASSERT_MAGIC_SETUTF8; |
96a5add6 | 2481 | PERL_UNUSED_CONTEXT; |
8772537c | 2482 | PERL_UNUSED_ARG(sv); |
7e8c5dac | 2483 | Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */ |
3881461a | 2484 | mg->mg_ptr = NULL; |
7e8c5dac HS |
2485 | mg->mg_len = -1; /* The mg_len holds the len cache. */ |
2486 | return 0; | |
2487 | } | |
2488 | ||
bbce6d69 | 2489 | int |
9cce4f9a FC |
2490 | Perl_magic_setlvref(pTHX_ SV *sv, MAGIC *mg) |
2491 | { | |
9782ce69 | 2492 | const char *bad = NULL; |
9cce4f9a | 2493 | PERL_ARGS_ASSERT_MAGIC_SETLVREF; |
26a50d99 | 2494 | if (!SvROK(sv)) Perl_croak(aTHX_ "Assigned value is not a reference"); |
9782ce69 FC |
2495 | switch (mg->mg_private & OPpLVREF_TYPE) { |
2496 | case OPpLVREF_SV: | |
2497 | if (SvTYPE(SvRV(sv)) > SVt_PVLV) | |
2498 | bad = " SCALAR"; | |
2499 | break; | |
2500 | case OPpLVREF_AV: | |
2501 | if (SvTYPE(SvRV(sv)) != SVt_PVAV) | |
2502 | bad = "n ARRAY"; | |
2503 | break; | |
2504 | case OPpLVREF_HV: | |
2505 | if (SvTYPE(SvRV(sv)) != SVt_PVHV) | |
2506 | bad = " HASH"; | |
2507 | break; | |
2508 | case OPpLVREF_CV: | |
2509 | if (SvTYPE(SvRV(sv)) != SVt_PVCV) | |
2510 | bad = " CODE"; | |
2511 | } | |
2512 | if (bad) | |
26a50d99 | 2513 | /* diag_listed_as: Assigned value is not %s reference */ |
9782ce69 | 2514 | Perl_croak(aTHX_ "Assigned value is not a%s reference", bad); |
c146a62a FC |
2515 | switch (mg->mg_obj ? SvTYPE(mg->mg_obj) : 0) { |
2516 | case 0: | |
2517 | { | |
2518 | SV * const old = PAD_SV(mg->mg_len); | |
2519 | PAD_SETSV(mg->mg_len, SvREFCNT_inc_NN(SvRV(sv))); | |
2520 | SvREFCNT_dec(old); | |
2521 | break; | |
2522 | } | |
2523 | case SVt_PVGV: | |
2524 | gv_setref(mg->mg_obj, sv); | |
2525 | SvSETMAGIC(mg->mg_obj); | |
6102323a FC |
2526 | break; |
2527 | case SVt_PVAV: | |
2528 | av_store((AV *)mg->mg_obj, SvIV((SV *)mg->mg_ptr), | |
2529 | SvREFCNT_inc_simple_NN(SvRV(sv))); | |
5f94141d FC |
2530 | break; |
2531 | case SVt_PVHV: | |
7fcb36d5 JH |
2532 | (void)hv_store_ent((HV *)mg->mg_obj, (SV *)mg->mg_ptr, |
2533 | SvREFCNT_inc_simple_NN(SvRV(sv)), 0); | |
c146a62a | 2534 | } |
d39c26a6 FC |
2535 | if (mg->mg_flags & MGf_PERSIST) |
2536 | NOOP; /* This sv is in use as an iterator var and will be reused, | |
2537 | so we must leave the magic. */ | |
2538 | else | |
2539 | /* This sv could be returned by the assignment op, so clear the | |
2540 | magic, as lvrefs are an implementation detail that must not be | |
2541 | leaked to the user. */ | |
2542 | sv_unmagic(sv, PERL_MAGIC_lvref); | |
9cce4f9a FC |
2543 | return 0; |
2544 | } | |
2545 | ||
f1540bed JH |
2546 | static void |
2547 | S_set_dollarzero(pTHX_ SV *sv) | |
2548 | PERL_TSA_REQUIRES(PL_dollarzero_mutex) | |
2549 | { | |
2550 | #ifdef USE_ITHREADS | |
2551 | dVAR; | |
2552 | #endif | |
2553 | const char *s; | |
2554 | STRLEN len; | |
f1540bed JH |
2555 | #ifdef HAS_SETPROCTITLE |
2556 | /* The BSDs don't show the argv[] in ps(1) output, they | |
2557 | * show a string from the process struct and provide | |
2558 | * the setproctitle() routine to manipulate that. */ | |
2559 | if (PL_origalen != 1) { | |
2560 | s = SvPV_const(sv, len); | |
2561 | # if __FreeBSD_version > 410001 | |
2562 | /* The leading "-" removes the "perl: " prefix, | |
2563 | * but not the "(perl) suffix from the ps(1) | |
2564 | * output, because that's what ps(1) shows if the | |
2565 | * argv[] is modified. */ | |
2566 | setproctitle("-%s", s); | |
2567 | # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */ | |
2568 | /* This doesn't really work if you assume that | |
2569 | * $0 = 'foobar'; will wipe out 'perl' from the $0 | |
2570 | * because in ps(1) output the result will be like | |
2571 | * sprintf("perl: %s (perl)", s) | |
2572 | * I guess this is a security feature: | |
2573 | * one (a user process) cannot get rid of the original name. | |
2574 | * --jhi */ | |
2575 | setproctitle("%s", s); | |
2576 | # endif | |
2577 | } | |
2578 | #elif defined(__hpux) && defined(PSTAT_SETCMD) | |
2579 | if (PL_origalen != 1) { | |
2580 | union pstun un; | |
2581 | s = SvPV_const(sv, len); | |
2582 | un.pst_command = (char *)s; | |
2583 | pstat(PSTAT_SETCMD, un, len, 0, 0); | |
2584 | } | |
2585 | #else | |
2586 | if (PL_origalen > 1) { | |
4f3e04fd | 2587 | I32 i; |
f1540bed JH |
2588 | /* PL_origalen is set in perl_parse(). */ |
2589 | s = SvPV_force(sv,len); | |
2590 | if (len >= (STRLEN)PL_origalen-1) { | |
2591 | /* Longer than original, will be truncated. We assume that | |
2592 | * PL_origalen bytes are available. */ | |
2593 | Copy(s, PL_origargv[0], PL_origalen-1, char); | |
2594 | } | |
2595 | else { | |
2596 | /* Shorter than original, will be padded. */ | |
2597 | #ifdef PERL_DARWIN | |
2598 | /* Special case for Mac OS X: see [perl #38868] */ | |
2599 | const int pad = 0; | |
2600 | #else | |
2601 | /* Is the space counterintuitive? Yes. | |
2602 | * (You were expecting \0?) | |
2603 | * Does it work? Seems to. (In Linux 2.4.20 at least.) | |
2604 | * --jhi */ | |
2605 | const int pad = ' '; | |
2606 | #endif | |
2607 | Copy(s, PL_origargv[0], len, char); | |
2608 | PL_origargv[0][len] = 0; | |
2609 | memset(PL_origargv[0] + len + 1, | |
2610 | pad, PL_origalen - len - 1); | |
2611 | } | |
2612 | PL_origargv[0][PL_origalen-1] = 0; | |
2613 | for (i = 1; i < PL_origargc; i++) | |
2614 | PL_origargv[i] = 0; | |
2615 | #ifdef HAS_PRCTL_SET_NAME | |
2616 | /* Set the legacy process name in addition to the POSIX name on Linux */ | |
2617 | if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) { | |
2618 | /* diag_listed_as: SKIPME */ | |
2619 | Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno)); | |
2620 | } | |
2621 | #endif | |
2622 | } | |
2623 | #endif | |
2624 | } | |
2625 | ||
9cce4f9a | 2626 | int |
864dbfa3 | 2627 | Perl_magic_set(pTHX_ SV *sv, MAGIC *mg) |
79072805 | 2628 | { |
20b7effb | 2629 | #ifdef USE_ITHREADS |
97aff369 | 2630 | dVAR; |
20b7effb | 2631 | #endif |
eb578fdb KW |
2632 | I32 paren; |
2633 | const REGEXP * rx; | |
79072805 | 2634 | I32 i; |
8990e307 | 2635 | STRLEN len; |
125b9982 | 2636 | MAGIC *tmg; |
2fdbfb4d | 2637 | |
7918f24d NC |
2638 | PERL_ARGS_ASSERT_MAGIC_SET; |
2639 | ||
e91d8259 | 2640 | if (!mg->mg_ptr) { |
960b831f | 2641 | paren = mg->mg_len; |
1e05feb3 | 2642 | if (PL_curpm && (rx = PM_GETRE(PL_curpm))) { |
e91d8259 | 2643 | setparen_got_rx: |
2fdbfb4d | 2644 | CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv); |
1e05feb3 | 2645 | } else { |
2fdbfb4d AB |
2646 | /* Croak with a READONLY error when a numbered match var is |
2647 | * set without a previous pattern match. Unless it's C<local $1> | |
2648 | */ | |
e91d8259 | 2649 | croakparen: |
2fdbfb4d | 2650 | if (!PL_localizing) { |
cb077ed2 | 2651 | Perl_croak_no_modify(); |
2fdbfb4d AB |
2652 | } |
2653 | } | |
e91d8259 NC |
2654 | return 0; |
2655 | } | |
2656 | ||
2657 | switch (*mg->mg_ptr) { | |
748a9306 | 2658 | case '\001': /* ^A */ |
f2da823f FC |
2659 | if (SvOK(sv)) sv_copypv(PL_bodytarget, sv); |
2660 | else SvOK_off(PL_bodytarget); | |
64eff8b7 DM |
2661 | FmLINES(PL_bodytarget) = 0; |
2662 | if (SvPOK(PL_bodytarget)) { | |
2663 | char *s = SvPVX(PL_bodytarget); | |
2664 | while ( ((s = strchr(s, '\n'))) ) { | |
2665 | FmLINES(PL_bodytarget)++; | |
2666 | s++; | |
2667 | } | |
2668 | } | |
125b9982 | 2669 | /* mg_set() has temporarily made sv non-magical */ |
284167a5 | 2670 | if (TAINTING_get) { |
125b9982 NT |
2671 | if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1) |
2672 | SvTAINTED_on(PL_bodytarget); | |
2673 | else | |
2674 | SvTAINTED_off(PL_bodytarget); | |
2675 | } | |
748a9306 | 2676 | break; |
49460fe6 | 2677 | case '\003': /* ^C */ |
f2338a2e | 2678 | PL_minus_c = cBOOL(SvIV(sv)); |
49460fe6 NIS |
2679 | break; |
2680 | ||
79072805 | 2681 | case '\004': /* ^D */ |
b4ab917c | 2682 | #ifdef DEBUGGING |
a9e2d2bf DM |
2683 | { |
2684 | const char *s = SvPV_nolen_const(sv); | |
2685 | PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG; | |
2686 | if (DEBUG_x_TEST || DEBUG_B_TEST) | |
2687 | dump_all_perl(!DEBUG_B_TEST); | |
2688 | } | |
b4ab917c | 2689 | #else |
38ab35f8 | 2690 | PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG; |
b4ab917c | 2691 | #endif |
79072805 | 2692 | break; |
28f23441 | 2693 | case '\005': /* ^E */ |
d0063567 | 2694 | if (*(mg->mg_ptr+1) == '\0') { |
e37778c2 | 2695 | #ifdef VMS |
38ab35f8 | 2696 | set_vaxc_errno(SvIV(sv)); |
e37778c2 NC |
2697 | #else |
2698 | # ifdef WIN32 | |
d0063567 | 2699 | SetLastError( SvIV(sv) ); |
e37778c2 NC |
2700 | # else |
2701 | # ifdef OS2 | |
38ab35f8 | 2702 | os2_setsyserrno(SvIV(sv)); |
e37778c2 | 2703 | # else |
d0063567 | 2704 | /* will anyone ever use this? */ |
38ab35f8 | 2705 | SETERRNO(SvIV(sv), 4); |
048c1ddf IZ |
2706 | # endif |
2707 | # endif | |
22fae026 | 2708 | #endif |
d0063567 | 2709 | } |
3e669301 | 2710 | else { |
a15a3d9b | 2711 | if (strEQ(mg->mg_ptr + 1, "NCODING") && SvOK(sv)) |
d5b4785c DIM |
2712 | if (PL_localizing != 2) { |
2713 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), | |
a15a3d9b | 2714 | "${^ENCODING} is no longer supported"); |
d5b4785c | 2715 | } |
3e669301 | 2716 | } |
d0063567 | 2717 | break; |
79072805 | 2718 | case '\006': /* ^F */ |
38ab35f8 | 2719 | PL_maxsysfd = SvIV(sv); |
79072805 | 2720 | break; |
a0d0e21e | 2721 | case '\010': /* ^H */ |
38ab35f8 | 2722 | PL_hints = SvIV(sv); |
a0d0e21e | 2723 | break; |
9d116dd7 | 2724 | case '\011': /* ^I */ /* NOT \t in EBCDIC */ |
43c5f42d | 2725 | Safefree(PL_inplace); |
bd61b366 | 2726 | PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL; |
da78da6e | 2727 | break; |
d9bad346 FC |
2728 | case '\016': /* ^N */ |
2729 | if (PL_curpm && (rx = PM_GETRE(PL_curpm)) | |
2730 | && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx; | |
2731 | goto croakparen; | |
28f23441 | 2732 | case '\017': /* ^O */ |
ac27b0f5 | 2733 | if (*(mg->mg_ptr+1) == '\0') { |
43c5f42d | 2734 | Safefree(PL_osname); |
bd61b366 | 2735 | PL_osname = NULL; |
3511154c DM |
2736 | if (SvOK(sv)) { |
2737 | TAINT_PROPER("assigning to $^O"); | |
2e0de35c | 2738 | PL_osname = savesvpv(sv); |
3511154c | 2739 | } |
ac27b0f5 NIS |
2740 | } |
2741 | else if (strEQ(mg->mg_ptr, "\017PEN")) { | |
8b850bd5 NC |
2742 | STRLEN len; |
2743 | const char *const start = SvPV(sv, len); | |
b54fc2b6 | 2744 | const char *out = (const char*)memchr(start, '\0', len); |
8b850bd5 | 2745 | SV *tmp; |
8b850bd5 NC |
2746 | |
2747 | ||
2748 | PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; | |
f747ebd6 | 2749 | PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT; |
8b850bd5 NC |
2750 | |
2751 | /* Opening for input is more common than opening for output, so | |
2752 | ensure that hints for input are sooner on linked list. */ | |
59cd0e26 | 2753 | tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1, |
f747ebd6 Z |
2754 | SvUTF8(sv)) |
2755 | : newSVpvs_flags("", SvUTF8(sv)); | |
2756 | (void)hv_stores(GvHV(PL_hintgv), "open>", tmp); | |
2757 | mg_set(tmp); | |
8b850bd5 | 2758 | |
f747ebd6 Z |
2759 | tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len, |
2760 | SvUTF8(sv)); | |
2761 | (void)hv_stores(GvHV(PL_hintgv), "open<", tmp); | |
2762 | mg_set(tmp); | |
ac27b0f5 | 2763 | } |
28f23441 | 2764 | break; |
79072805 | 2765 | case '\020': /* ^P */ |
2fdbfb4d AB |
2766 | PL_perldb = SvIV(sv); |
2767 | if (PL_perldb && !PL_DBsingle) | |
2768 | init_debugger(); | |
9b9e0be4 | 2769 | break; |
79072805 | 2770 | case '\024': /* ^T */ |
88e89b8a | 2771 | #ifdef BIG_TIME |
6b88bc9c | 2772 | PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)); |
88e89b8a | 2773 | #else |
38ab35f8 | 2774 | PL_basetime = (Time_t)SvIV(sv); |
88e89b8a | 2775 | #endif |
79072805 | 2776 | break; |
e07ea26a NC |
2777 | case '\025': /* ^UTF8CACHE */ |
2778 | if (strEQ(mg->mg_ptr+1, "TF8CACHE")) { | |
2779 | PL_utf8cache = (signed char) sv_2iv(sv); | |
2780 | } | |
2781 | break; | |
fde18df1 | 2782 | case '\027': /* ^W & $^WARNING_BITS */ |
4438c4b7 JH |
2783 | if (*(mg->mg_ptr+1) == '\0') { |
2784 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { | |
38ab35f8 | 2785 | i = SvIV(sv); |
ac27b0f5 | 2786 | PL_dowarn = (PL_dowarn & ~G_WARN_ON) |
0453d815 | 2787 | | (i ? G_WARN_ON : G_WARN_OFF) ; |
4438c4b7 | 2788 | } |
599cee73 | 2789 | } |
0a378802 | 2790 | else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) { |
4438c4b7 | 2791 | if ( ! (PL_dowarn & G_WARN_ALL_MASK)) { |
7e4f0450 FC |
2792 | if (!SvPOK(sv)) { |
2793 | PL_compiling.cop_warnings = pWARN_STD; | |
d775746e GS |
2794 | break; |
2795 | } | |
f4fc7782 | 2796 | { |
b5477537 | 2797 | STRLEN len, i; |
d3a7d8c7 | 2798 | int accumulate = 0 ; |
f4fc7782 | 2799 | int any_fatals = 0 ; |
b83604b4 | 2800 | const char * const ptr = SvPV_const(sv, len) ; |
f4fc7782 JH |
2801 | for (i = 0 ; i < len ; ++i) { |
2802 | accumulate |= ptr[i] ; | |
2803 | any_fatals |= (ptr[i] & 0xAA) ; | |
2804 | } | |
4243c432 NC |
2805 | if (!accumulate) { |
2806 | if (!specialWARN(PL_compiling.cop_warnings)) | |
2807 | PerlMemShared_free(PL_compiling.cop_warnings); | |
2808 | PL_compiling.cop_warnings = pWARN_NONE; | |
2809 | } | |
3c3f8cd6 AB |
2810 | /* Yuck. I can't see how to abstract this: */ |
2811 | else if (isWARN_on( | |
2812 | ((STRLEN *)SvPV_nolen_const(sv)) - 1, | |
2813 | WARN_ALL) | |
2814 | && !any_fatals) | |
2815 | { | |
2816 | if (!specialWARN(PL_compiling.cop_warnings)) | |
2817 | PerlMemShared_free(PL_compiling.cop_warnings); | |
2818 | PL_compiling.cop_warnings = pWARN_ALL; | |
2819 | PL_dowarn |= G_WARN_ONCE ; | |
2820 | } | |
d3a7d8c7 | 2821 | else { |
72dc9ed5 NC |
2822 | STRLEN len; |
2823 | const char *const p = SvPV_const(sv, len); | |
2824 | ||
2825 | PL_compiling.cop_warnings | |
8ee4cf24 | 2826 | = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings, |
72dc9ed5 NC |
2827 | p, len); |
2828 | ||
d3a7d8c7 GS |
2829 | if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE)) |
2830 | PL_dowarn |= G_WARN_ONCE ; | |
2831 | } | |
f4fc7782 | 2832 | |
d3a7d8c7 | 2833 | } |
4438c4b7 | 2834 | } |
971a9dd3 | 2835 | } |
8ca2a5d6 DD |
2836 | #ifdef WIN32 |
2837 | else if (strEQ(mg->mg_ptr+1, "IN32_SLOPPY_STAT")) { | |
2838 | w32_sloppystat = (bool)sv_true(sv); | |
2839 | } | |
2840 | #endif | |
79072805 LW |
2841 | break; |
2842 | case '.': | |
3280af22 NIS |
2843 | if (PL_localizing) { |
2844 | if (PL_localizing == 1) | |
7766f137 | 2845 | SAVESPTR(PL_last_in_gv); |
748a9306 | 2846 | } |
3280af22 | 2847 | else if (SvOK(sv) && GvIO(PL_last_in_gv)) |
632db599 | 2848 | IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv); |
79072805 LW |
2849 | break; |
2850 | case '^': | |
acbe1b9d | 2851 | Safefree(IoTOP_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 2852 | IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 2853 | IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
2854 | break; |
2855 | case '~': | |
acbe1b9d | 2856 | Safefree(IoFMT_NAME(GvIOp(PL_defoutgv))); |
a9e2d2bf | 2857 | IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv); |
acbe1b9d | 2858 | IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO); |
79072805 LW |
2859 | break; |
2860 | case '=': | |
acbe1b9d | 2861 | IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
2862 | break; |
2863 | case '-': | |
acbe1b9d FC |
2864 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
2865 | if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L) | |
099be4f1 | 2866 | IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L; |
79072805 LW |
2867 | break; |
2868 | case '%': | |
acbe1b9d | 2869 | IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv)); |
79072805 LW |
2870 | break; |
2871 | case '|': | |
4b65379b | 2872 | { |
099be4f1 | 2873 | IO * const io = GvIO(PL_defoutgv); |
720f287d AB |
2874 | if(!io) |
2875 | break; | |
38ab35f8 | 2876 | if ((SvIV(sv)) == 0) |
4b65379b CS |
2877 | IoFLAGS(io) &= ~IOf_FLUSH; |
2878 | else { | |
2879 | if (!(IoFLAGS(io) & IOf_FLUSH)) { | |
2880 | PerlIO *ofp = IoOFP(io); | |
2881 | if (ofp) | |
2882 | (void)PerlIO_flush(ofp); | |
2883 | IoFLAGS(io) |= IOf_FLUSH; | |
2884 | } | |
2885 | } | |
79072805 LW |
2886 | } |
2887 | break; | |
79072805 | 2888 | case '/': |
1ab48e3a YO |
2889 | { |
2890 | SV *tmpsv= sv; | |
2891 | if (SvROK(sv)) { | |
2892 | SV *referent= SvRV(sv); | |
2893 | const char *reftype= sv_reftype(referent, 0); | |
2894 | /* XXX: dodgy type check: This leaves me feeling dirty, but the alternative | |
2895 | * is to copy pretty much the entire sv_reftype() into this routine, or to do | |
2896 | * a full string comparison on the return of sv_reftype() both of which | |
2897 | * make me feel worse! NOTE, do not modify this comment without reviewing the | |
2898 | * corresponding comment in sv_reftype(). - Yves */ | |
2899 | if (reftype[0] == 'S' || reftype[0] == 'L') { | |
2900 | IV val= SvIV(referent); | |
2901 | if (val <= 0) { | |
2902 | tmpsv= &PL_sv_undef; | |
ddc3d23f | 2903 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
1ab48e3a YO |
2904 | "Setting $/ to a reference to %s as a form of slurp is deprecated, treating as undef", |
2905 | SvIV(SvRV(sv)) < 0 ? "a negative integer" : "zero" | |
2906 | ); | |
2907 | } | |
2908 | } else { | |
ddce084a | 2909 | sv_setsv(sv, PL_rs); |
ee0ba734 | 2910 | /* diag_listed_as: Setting $/ to %s reference is forbidden */ |
a48e4205 FC |
2911 | Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden", |
2912 | *reftype == 'A' ? "n" : "", reftype); | |
1ab48e3a YO |
2913 | } |
2914 | } | |
b3a2acfa | 2915 | SvREFCNT_dec(PL_rs); |
1ab48e3a | 2916 | PL_rs = newSVsv(tmpsv); |
b3a2acfa | 2917 | } |
79072805 LW |
2918 | break; |
2919 | case '\\': | |
ef8d46e8 | 2920 | SvREFCNT_dec(PL_ors_sv); |
6bc2995b | 2921 | if (SvOK(sv)) { |
7889fe52 | 2922 | PL_ors_sv = newSVsv(sv); |
009c130f | 2923 | } |
e3c19b7b | 2924 | else { |
a0714e2c | 2925 | PL_ors_sv = NULL; |
e3c19b7b | 2926 | } |
79072805 | 2927 | break; |
7d69d4a6 FC |
2928 | case '[': |
2929 | if (SvIV(sv) != 0) | |
2930 | Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible"); | |
2931 | break; | |
79072805 | 2932 | case '?': |
ff0cee69 | 2933 | #ifdef COMPLEX_STATUS |
6b88bc9c | 2934 | if (PL_localizing == 2) { |
41cb7b2b | 2935 | SvUPGRADE(sv, SVt_PVLV); |
6b88bc9c GS |
2936 | PL_statusvalue = LvTARGOFF(sv); |
2937 | PL_statusvalue_vms = LvTARGLEN(sv); | |
ff0cee69 PP |
2938 | } |
2939 | else | |
2940 | #endif | |
2941 | #ifdef VMSISH_STATUS | |
2942 | if (VMSISH_STATUS) | |
fb38d079 | 2943 | STATUS_NATIVE_CHILD_SET((U32)SvIV(sv)); |
ff0cee69 PP |
2944 | else |
2945 | #endif | |
38ab35f8 | 2946 | STATUS_UNIX_EXIT_SET(SvIV(sv)); |
79072805 LW |
2947 | break; |
2948 | case '!': | |
93189314 JH |
2949 | { |
2950 | #ifdef VMS | |
2951 | # define PERL_VMS_BANG vaxc$errno | |
2952 | #else | |
2953 | # define PERL_VMS_BANG 0 | |
2954 | #endif | |
27329181 | 2955 | #if defined(WIN32) && ! defined(UNDER_CE) |
c9beaf97 SH |
2956 | SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0), |
2957 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); | |
2958 | #else | |
91487cfc | 2959 | SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0, |
93189314 | 2960 | (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG); |
c9beaf97 | 2961 | #endif |
93189314 | 2962 | } |
79072805 LW |
2963 | break; |
2964 | case '<': | |
985213f2 | 2965 | { |
b469f1e0 | 2966 | /* XXX $< currently silently ignores failures */ |
dfff4baf | 2967 | const Uid_t new_uid = SvUID(sv); |
985213f2 | 2968 | PL_delaymagic_uid = new_uid; |
3280af22 NIS |
2969 | if (PL_delaymagic) { |
2970 | PL_delaymagic |= DM_RUID; | |
79072805 LW |
2971 | break; /* don't do magic till later */ |
2972 | } | |
2973 | #ifdef HAS_SETRUID | |
b469f1e0 | 2974 | PERL_UNUSED_RESULT(setruid(new_uid)); |
79072805 LW |
2975 | #else |
2976 | #ifdef HAS_SETREUID | |
b469f1e0 | 2977 | PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1)); |
748a9306 | 2978 | #else |
85e6fe83 | 2979 | #ifdef HAS_SETRESUID |
b469f1e0 | 2980 | PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1)); |
79072805 | 2981 | #else |
985213f2 | 2982 | if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */ |
75870ed3 | 2983 | #ifdef PERL_DARWIN |
2984 | /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */ | |
985213f2 | 2985 | if (new_uid != 0 && PerlProc_getuid() == 0) |
b469f1e0 | 2986 | PERL_UNUSED_RESULT(PerlProc_setuid(0)); |
75870ed3 | 2987 | #endif |
b469f1e0 | 2988 | PERL_UNUSED_RESULT(PerlProc_setuid(new_uid)); |
75870ed3 | 2989 | } else { |
cea2e8a9 | 2990 | Perl_croak(aTHX_ "setruid() not implemented"); |
a0d0e21e | 2991 | } |
79072805 LW |
2992 | #endif |
2993 | #endif | |
85e6fe83 | 2994 | #endif |
79072805 | 2995 | break; |
985213f2 | 2996 | } |
79072805 | 2997 | case '>': |
985213f2 | 2998 | { |
b469f1e0 | 2999 | /* XXX $> currently silently ignores failures */ |
dfff4baf | 3000 | const Uid_t new_euid = SvUID(sv); |
985213f2 | 3001 | PL_delaymagic_euid = new_euid; |
3280af22 NIS |
3002 | if (PL_delaymagic) { |
3003 | PL_delaymagic |= DM_EUID; | |
79072805 LW |
3004 | break; /* don't do magic till later */ |
3005 | } | |
3006 | #ifdef HAS_SETEUID | |
b469f1e0 | 3007 | PERL_UNUSED_RESULT(seteuid(new_euid)); |
79072805 LW |
3008 | #else |
3009 | #ifdef HAS_SETREUID | |
b469f1e0 | 3010 | PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid)); |
85e6fe83 LW |
3011 | #else |
3012 | #ifdef HAS_SETRESUID | |
b469f1e0 | 3013 | PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1)); |
79072805 | 3014 | #else |
985213f2 | 3015 | if (new_euid == PerlProc_getuid()) /* special case $> = $< */ |
b469f1e0 | 3016 | PERL_UNUSED_RESULT(PerlProc_setuid(new_euid)); |
a0d0e21e | 3017 | else { |
cea2e8a9 | 3018 | Perl_croak(aTHX_ "seteuid() not implemented"); |
a0d0e21e | 3019 | } |
79072805 LW |
3020 | #endif |
3021 | #endif | |
85e6fe83 | 3022 | #endif |
79072805 | 3023 | break; |
985213f2 | 3024 | } |
79072805 | 3025 | case '(': |
985213f2 | 3026 | { |
b469f1e0 | 3027 | /* XXX $( currently silently ignores failures */ |
dfff4baf | 3028 | const Gid_t new_gid = SvGID(sv); |
985213f2 | 3029 | PL_delaymagic_gid = new_gid; |
3280af22 NIS |
3030 | if (PL_delaymagic) { |
3031 | PL_delaymagic |= DM_RGID; | |
79072805 LW |
3032 | break; /* don't do magic till later */ |
3033 | } | |
3034 | #ifdef HAS_SETRGID | |
b469f1e0 | 3035 | PERL_UNUSED_RESULT(setrgid(new_gid)); |
79072805 LW |
3036 | #else |
3037 | #ifdef HAS_SETREGID | |
b469f1e0 | 3038 | PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1)); |
85e6fe83 LW |
3039 | #else |
3040 | #ifdef HAS_SETRESGID | |
b469f1e0 | 3041 | PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1)); |
79072805 | 3042 | #else |
985213f2 | 3043 | if (new_gid == PerlProc_getegid()) /* special case $( = $) */ |
b469f1e0 | 3044 | PERL_UNUSED_RESULT(PerlProc_setgid(new_gid)); |
748a9306 | 3045 | else { |
cea2e8a9 | 3046 | Perl_croak(aTHX_ "setrgid() not implemented"); |
748a9306 | 3047 | } |
79072805 LW |
3048 | #endif |
3049 | #endif | |
85e6fe83 | 3050 | #endif |
79072805 | 3051 | break; |
985213f2 | 3052 | } |
79072805 | 3053 | case ')': |
985213f2 | 3054 | { |
0635704a HS |
3055 | /* (hv) best guess: maybe we'll need configure probes to do a better job, |
3056 | * but you can override it if you need to. | |
3057 | */ | |
3058 | #ifndef INVALID_GID | |
3059 | #define INVALID_GID ((Gid_t)-1) | |
3060 | #endif | |
b469f1e0 | 3061 | /* XXX $) currently silently ignores failures */ |
dfff4baf | 3062 | Gid_t new_egid; |
5cd24f17 PP |
3063 | #ifdef HAS_SETGROUPS |
3064 | { | |
b83604b4 | 3065 | const char *p = SvPV_const(sv, len); |
757f63d8 | 3066 | Groups_t *gary = NULL; |
fdadaf77 | 3067 | const char* endptr; |
22ff3130 | 3068 | UV uv; |
fb4089e0 | 3069 | #ifdef _SC_NGROUPS_MAX |
3070 | int maxgrp = sysconf(_SC_NGROUPS_MAX); | |
3071 | ||
3072 | if (maxgrp < 0) | |
3073 | maxgrp = NGROUPS; | |
3074 | #else | |
3075 | int maxgrp = NGROUPS; | |
3076 | #endif | |
757f63d8 SP |
3077 | |
3078 | while (isSPACE(*p)) | |
3079 | ++p; | |
22ff3130 HS |
3080 | if (grok_atoUV(p, &uv, &endptr)) |
3081 | new_egid = (Gid_t)uv; | |
3082 | else { | |
0635704a | 3083 | new_egid = INVALID_GID; |
22ff3130 HS |
3084 | endptr = NULL; |
3085 | } | |
fb4089e0 | 3086 | for (i = 0; i < maxgrp; ++i) { |
fdadaf77 JH |
3087 | if (endptr == NULL) |
3088 | break; | |
3089 | p = endptr; | |
757f63d8 SP |
3090 | while (isSPACE(*p)) |
3091 | ++p; | |
3092 | if (!*p) | |
3093 | break; | |
fdadaf77 | 3094 | if (!gary) |
757f63d8 SP |
3095 | Newx(gary, i + 1, Groups_t); |
3096 | else | |
3097 | Renew(gary, i + 1, Groups_t); | |
22ff3130 HS |
3098 | if (grok_atoUV(p, &uv, &endptr)) |
3099 | gary[i] = (Groups_t)uv; | |
3100 | else { | |
0635704a | 3101 | gary[i] = INVALID_GID; |
22ff3130 HS |
3102 | endptr = NULL; |
3103 | } | |
757f63d8 SP |
3104 | } |
3105 | if (i) | |
b469f1e0 | 3106 | PERL_UNUSED_RESULT(setgroups(i, gary)); |
f5a63d97 | 3107 | Safefree(gary); |
5cd24f17 PP |
3108 | } |
3109 | #else /* HAS_SETGROUPS */ | |
dfff4baf | 3110 | new_egid = SvGID(sv); |
5cd24f17 | 3111 | #endif /* HAS_SETGROUPS */ |
985213f2 | 3112 | PL_delaymagic_egid = new_egid; |
3280af22 NIS |
3113 | if (PL_delaymagic) { |
3114 | PL_delaymagic |= DM_EGID; | |
79072805 LW |
3115 | break; /* don't do magic till later */ |
3116 | } | |
3117 | #ifdef HAS_SETEGID | |
b469f1e0 | 3118 | PERL_UNUSED_RESULT(setegid(new_egid)); |
79072805 LW |
3119 | #else |
3120 | #ifdef HAS_SETREGID | |
b469f1e0 | 3121 | PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid)); |
85e6fe83 LW |
3122 | #else |
3123 | #ifdef HAS_SETRESGID | |
b469f1e0 | 3124 | PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1)); |
79072805 | 3125 | #else |
985213f2 | 3126 | if (new_egid == PerlProc_getgid()) /* special case $) = $( */ |
b469f1e0 | 3127 | PERL_UNUSED_RESULT(PerlProc_setgid(new_egid)); |
748a9306 | 3128 | else { |
cea2e8a9 | 3129 | Perl_croak(aTHX_ "setegid() not implemented"); |
748a9306 | 3130 | } |
79072805 LW |
3131 | #endif |
3132 | #endif | |
85e6fe83 | 3133 | #endif |
79072805 | 3134 | break; |
985213f2 | 3135 | } |
79072805 | 3136 | case ':': |
2d8e6c8d | 3137 | PL_chopset = SvPV_force(sv,len); |
79072805 | 3138 | break; |
9cdac2a2 FC |
3139 | case '$': /* $$ */ |
3140 | /* Store the pid in mg->mg_obj so we can tell when a fork has | |
3141 | occurred. mg->mg_obj points to *$ by default, so clear it. */ | |
3142 | if (isGV(mg->mg_obj)) { | |
3143 | if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */ | |
3144 | SvREFCNT_dec(mg->mg_obj); | |
3145 | mg->mg_flags |= MGf_REFCOUNTED; | |
3146 | mg->mg_obj = newSViv((IV)PerlProc_getpid()); | |
3147 | } | |
3148 | else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid()); | |
3149 | break; | |
79072805 | 3150 | case '0': |
e2975953 | 3151 | LOCK_DOLLARZERO_MUTEX; |
f1540bed | 3152 | S_set_dollarzero(aTHX_ sv); |
e2975953 | 3153 | UNLOCK_DOLLARZERO_MUTEX; |
79072805 LW |
3154 | break; |
3155 | } | |
3156 | return 0; | |
3157 | } | |
3158 | ||
3159 | I32 | |
84c7b88c BF |
3160 | Perl_whichsig_sv(pTHX_ SV *sigsv) |
3161 | { | |
3162 | const char *sigpv; | |
3163 | STRLEN siglen; | |
3164 | PERL_ARGS_ASSERT_WHICHSIG_SV; | |
84c7b88c BF |
3165 | sigpv = SvPV_const(sigsv, siglen); |
3166 | return whichsig_pvn(sigpv, siglen); | |
3167 | } | |
3168 | ||
3169 | I32 | |
3170 | Perl_whichsig_pv(pTHX_ const char *sig) | |
3171 | { | |
3172 | PERL_ARGS_ASSERT_WHICHSIG_PV; | |
84c7b88c BF |
3173 | return whichsig_pvn(sig, strlen(sig)); |
3174 | } | |
3175 | ||
3176 | I32 | |
3177 | Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len) | |
79072805 | 3178 | { |
eb578fdb | 3179 | char* const* sigv; |
7918f24d | 3180 | |
84c7b88c | 3181 | PERL_ARGS_ASSERT_WHICHSIG_PVN; |
96a5add6 | 3182 | PERL_UNUSED_CONTEXT; |
79072805 | 3183 | |
aadb217d | 3184 | for (sigv = (char* const*)PL_sig_name; *sigv; sigv++) |
84c7b88c | 3185 | if (strlen(*sigv) == len && memEQ(sig,*sigv, len)) |
aadb217d | 3186 | return PL_sig_num[sigv - (char* const*)PL_sig_name]; |
79072805 | 3187 | #ifdef SIGCLD |
84c7b88c | 3188 | if (memEQs(sig, len, "CHLD")) |
79072805 LW |
3189 | return SIGCLD; |
3190 | #endif | |
3191 | #ifdef SIGCHLD | |
84c7b88c | 3192 | if (memEQs(sig, len, "CLD")) |
79072805 LW |
3193 | return SIGCHLD; |
3194 | #endif | |
7f1236c0 | 3195 | return -1; |
79072805 LW |
3196 | } |
3197 | ||
ecfc5424 | 3198 | Signal_t |
1e82f5a6 | 3199 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
b3dbdd48 | 3200 | Perl_sighandler(int sig, siginfo_t *sip, void *uap) |
1e82f5a6 SH |
3201 | #else |
3202 | Perl_sighandler(int sig) | |
3203 | #endif | |
79072805 | 3204 | { |
1018e26f NIS |
3205 | #ifdef PERL_GET_SIG_CONTEXT |
3206 | dTHXa(PERL_GET_SIG_CONTEXT); | |
71d280e3 | 3207 | #else |
cea2e8a9 | 3208 | dTHX; |
71d280e3 | 3209 | #endif |
79072805 | 3210 | dSP; |
a0714e2c SS |
3211 | GV *gv = NULL; |
3212 | SV *sv = NULL; | |
8772537c | 3213 | SV * const tSv = PL_Sv; |
601f1833 | 3214 | CV *cv = NULL; |
533c011a | 3215 | OP *myop = PL_op; |
84902520 | 3216 | U32 flags = 0; |
8772537c | 3217 | XPV * const tXpv = PL_Xpv; |
0c4d3b5e | 3218 | I32 old_ss_ix = PL_savestack_ix; |
100c03aa | 3219 | SV *errsv_save = NULL; |
71d280e3 | 3220 | |
84902520 | 3221 | |
727405f8 | 3222 | if (!PL_psig_ptr[sig]) { |
99ef548b | 3223 | PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n", |
727405f8 NIS |
3224 | PL_sig_name[sig]); |
3225 | exit(sig); | |
3226 | } | |
ff0cee69 | 3227 | |
a0d63a7b DM |
3228 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3229 | /* Max number of items pushed there is 3*n or 4. We cannot fix | |
3230 | infinity, so we fix 4 (in fact 5): */ | |
3231 | if (PL_savestack_ix + 15 <= PL_savestack_max) { | |
3232 | flags |= 1; | |
3233 | PL_savestack_ix += 5; /* Protect save in progress. */ | |
3234 | SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL); | |
3235 | } | |
84902520 | 3236 | } |
84902520 | 3237 | /* sv_2cv is too complicated, try a simpler variant first: */ |
ea726b52 | 3238 | if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig]))) |
8772537c AL |
3239 | || SvTYPE(cv) != SVt_PVCV) { |
3240 | HV *st; | |
f2c0649b | 3241 | cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD); |
8772537c | 3242 | } |
84902520 | 3243 | |
a0d0e21e | 3244 | if (!cv || !CvROOT(cv)) { |
07c325bb | 3245 | const HEK * const hek = gv |
1d6bb9ae FC |
3246 | ? GvENAME_HEK(gv) |
3247 | : cv && CvNAMED(cv) | |
3248 | ? CvNAME_HEK(cv) | |
07c325bb FC |
3249 | : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL; |
3250 | if (hek) | |
3251 | Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3252 | "SIG%s handler \"%"HEKf"\" not defined.\n", | |
ac892e4a | 3253 | PL_sig_name[sig], HEKfARG(hek)); |
07c325bb FC |
3254 | /* diag_listed_as: SIG%s handler "%s" not defined */ |
3255 | else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), | |
3256 | "SIG%s handler \"__ANON__\" not defined.\n", | |
3257 | PL_sig_name[sig]); | |
00d579c5 | 3258 | goto cleanup; |
79072805 LW |
3259 | } |
3260 | ||
0c4d3b5e DM |
3261 | sv = PL_psig_name[sig] |
3262 | ? SvREFCNT_inc_NN(PL_psig_name[sig]) | |
3263 | : newSVpv(PL_sig_name[sig],0); | |
72048cfe | 3264 | flags |= 8; |
0c4d3b5e DM |
3265 | SAVEFREESV(sv); |
3266 | ||
a0d63a7b DM |
3267 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { |
3268 | /* make sure our assumption about the size of the SAVEs are correct: | |
3269 | * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */ | |
3270 | assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix); | |
3271 | } | |
e336de0d | 3272 | |
e788e7d3 | 3273 | PUSHSTACKi(PERLSI_SIGNAL); |
924508f0 | 3274 | PUSHMARK(SP); |
79072805 | 3275 | PUSHs(sv); |
8aad04aa JH |
3276 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
3277 | { | |
3278 | struct sigaction oact; | |
3279 | ||
3280 | if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) { | |
8aad04aa JH |
3281 | if (sip) { |
3282 | HV *sih = newHV(); | |
ad64d0ec | 3283 | SV *rv = newRV_noinc(MUTABLE_SV(sih)); |
8aad04aa JH |
3284 | /* The siginfo fields signo, code, errno, pid, uid, |
3285 | * addr, status, and band are defined by POSIX/SUSv3. */ | |
85771703 NC |
3286 | (void)hv_stores(sih, "signo", newSViv(sip->si_signo)); |
3287 | (void)hv_stores(sih, "code", newSViv(sip->si_code)); | |
cdfe2e65 DIM |
3288 | #ifdef HAS_SIGINFO_SI_ERRNO |
3289 | (void)hv_stores(sih, "errno", newSViv(sip->si_errno)); | |
3290 | #endif | |
3291 | #ifdef HAS_SIGINFO_SI_STATUS | |
3292 | (void)hv_stores(sih, "status", newSViv(sip->si_status)); | |
3293 | #endif | |
3294 | #ifdef HAS_SIGINFO_SI_UID | |
3295 | { | |
3296 | SV *uid = newSV(0); | |
3297 | sv_setuid(uid, sip->si_uid); | |
3298 | (void)hv_stores(sih, "uid", uid); | |
3299 | } | |
3300 | #endif | |
3301 | #ifdef HAS_SIGINFO_SI_PID | |
3302 | (void)hv_stores(sih, "pid", newSViv(sip->si_pid)); | |
3303 | #endif | |
3304 | #ifdef HAS_SIGINFO_SI_ADDR | |
3305 | (void)hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr))); | |
3306 | #endif | |
3307 | #ifdef HAS_SIGINFO_SI_BAND | |
3308 | (void)hv_stores(sih, "band", newSViv(sip->si_band)); | |
79dec0f4 | 3309 | #endif |
8aad04aa | 3310 | EXTEND(SP, 2); |
ad64d0ec | 3311 | PUSHs(rv); |
22f1178f | 3312 | mPUSHp((char *)sip, sizeof(*sip)); |
8aad04aa | 3313 | } |
b4552a27 | 3314 | |
8aad04aa JH |
3315 | } |
3316 | } | |
3317 | #endif | |
79072805 | 3318 | PUTBACK; |
a0d0e21e | 3319 | |
100c03aa JL |
3320 | errsv_save = newSVsv(ERRSV); |
3321 | ||
ad64d0ec | 3322 | call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL); |
79072805 | 3323 | |
d3acc0f7 | 3324 | POPSTACK; |
eed484f9 DD |
3325 | { |
3326 | SV * const errsv = ERRSV; | |
3327 | if (SvTRUE_NN(errsv)) { | |
3328 | SvREFCNT_dec(errsv_save); | |
c22d665b | 3329 | #ifndef PERL_MICRO |
1b266415 NIS |
3330 | /* Handler "died", for example to get out of a restart-able read(). |
3331 | * Before we re-do that on its behalf re-enable the signal which was | |
3332 | * blocked by the system when we entered. | |
3333 | */ | |
c22d665b | 3334 | #ifdef HAS_SIGPROCMASK |
d488af49 | 3335 | #if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
eed484f9 | 3336 | if (sip || uap) |
c22d665b | 3337 | #endif |
eed484f9 DD |
3338 | { |
3339 | sigset_t set; | |
3340 | sigemptyset(&set); | |
3341 | sigaddset(&set,sig); | |
3342 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
3343 | } | |
c22d665b | 3344 | #else |
eed484f9 DD |
3345 | /* Not clear if this will work */ |
3346 | (void)rsignal(sig, SIG_IGN); | |
3347 | (void)rsignal(sig, PL_csighandlerp); | |
c22d665b LT |
3348 | #endif |
3349 | #endif /* !PERL_MICRO */ | |
eed484f9 DD |
3350 | die_sv(errsv); |
3351 | } | |
3352 | else { | |
3353 | sv_setsv(errsv, errsv_save); | |
3354 | SvREFCNT_dec(errsv_save); | |
3355 | } | |
100c03aa JL |
3356 | } |
3357 | ||
7b52d656 | 3358 | cleanup: |
0c4d3b5e DM |
3359 | /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */ |
3360 | PL_savestack_ix = old_ss_ix; | |
72048cfe | 3361 | if (flags & 8) |
2357bae7 | 3362 | SvREFCNT_dec_NN(sv); |
533c011a | 3363 | PL_op = myop; /* Apparently not needed... */ |
ac27b0f5 | 3364 | |
3280af22 NIS |
3365 | PL_Sv = tSv; /* Restore global temporaries. */ |
3366 | PL_Xpv = tXpv; | |
53bb94e2 | 3367 | return; |
79072805 | 3368 | } |
4e35701f NIS |
3369 | |
3370 | ||
51371543 | 3371 | static void |
8772537c | 3372 | S_restore_magic(pTHX_ const void *p) |
51371543 | 3373 | { |
8772537c AL |
3374 | MGS* const mgs = SSPTR(PTR2IV(p), MGS*); |
3375 | SV* const sv = mgs->mgs_sv; | |
150b625d | 3376 | bool bumped; |
51371543 GS |
3377 | |
3378 | if (!sv) | |
3379 | return; | |
3380 | ||
4bac9ae4 CS |
3381 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
3382 | SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */ | |
a623f893 FC |
3383 | if (mgs->mgs_flags) |
3384 | SvFLAGS(sv) |= mgs->mgs_flags; | |
51371543 GS |
3385 | else |
3386 | mg_magical(sv); | |
51371543 GS |
3387 | } |
3388 | ||
150b625d | 3389 | bumped = mgs->mgs_bumped; |
51371543 GS |
3390 | mgs->mgs_sv = NULL; /* mark the MGS structure as restored */ |
3391 | ||
3392 | /* If we're still on top of the stack, pop us off. (That condition | |
3393 | * will be satisfied if restore_magic was called explicitly, but *not* | |
3394 | * if it's being called via leave_scope.) | |
3395 | * The reason for doing this is that otherwise, things like sv_2cv() | |
3396 | * may leave alloc gunk on the savestack, and some code | |
3397 | * (e.g. sighandler) doesn't expect that... | |
3398 | */ | |
3399 | if (PL_savestack_ix == mgs->mgs_ss_ix) | |
3400 | { | |
1be36ce0 NC |
3401 | UV popval = SSPOPUV; |
3402 | assert(popval == SAVEt_DESTRUCTOR_X); | |
51371543 | 3403 | PL_savestack_ix -= 2; |
1be36ce0 NC |
3404 | popval = SSPOPUV; |
3405 | assert((popval & SAVE_MASK) == SAVEt_ALLOC); | |
3406 | PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT; | |
51371543 | 3407 | } |
150b625d DM |
3408 | if (bumped) { |
3409 | if (SvREFCNT(sv) == 1) { | |
3410 | /* We hold the last reference to this SV, which implies that the | |
3411 | SV was deleted as a side effect of the routines we called. | |
3412 | So artificially keep it alive a bit longer. | |
3413 | We avoid turning on the TEMP flag, which can cause the SV's | |
3414 | buffer to get stolen (and maybe other stuff). */ | |
150b625d | 3415 | sv_2mortal(sv); |
4bac9ae4 | 3416 | SvTEMP_off(sv); |
8985fe98 | 3417 | } |
150b625d | 3418 | else |
2357bae7 | 3419 | SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */ |
8985fe98 | 3420 | } |
51371543 GS |
3421 | } |
3422 | ||
0c4d3b5e DM |
3423 | /* clean up the mess created by Perl_sighandler(). |
3424 | * Note that this is only called during an exit in a signal handler; | |
3425 | * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually | |
9a7f166c | 3426 | * skipped over. */ |
0c4d3b5e | 3427 | |
51371543 | 3428 | static void |
8772537c | 3429 | S_unwind_handler_stack(pTHX_ const void *p) |
51371543 | 3430 | { |
0c4d3b5e | 3431 | PERL_UNUSED_ARG(p); |
7918f24d | 3432 | |
0c4d3b5e | 3433 | PL_savestack_ix -= 5; /* Unprotect save in progress. */ |
51371543 | 3434 | } |
1018e26f | 3435 | |
66610fdd | 3436 | /* |
b3ca2e83 NC |
3437 | =for apidoc magic_sethint |
3438 | ||
796b6530 | 3439 | Triggered by a store to C<%^H>, records the key/value pair to |
c28fe1ec NC |
3440 | C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing |
3441 | anything that would need a deep copy. Maybe we should warn if we find a | |
3442 | reference. | |
b3ca2e83 NC |
3443 | |
3444 | =cut | |
3445 | */ | |
3446 | int | |
3447 | Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg) | |
3448 | { | |
ad64d0ec | 3449 | SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr) |
59cd0e26 | 3450 | : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP); |
b3ca2e83 | 3451 | |
7918f24d NC |
3452 | PERL_ARGS_ASSERT_MAGIC_SETHINT; |
3453 | ||
e6e3e454 NC |
3454 | /* mg->mg_obj isn't being used. If needed, it would be possible to store |
3455 | an alternative leaf in there, with PL_compiling.cop_hints being used if | |
3456 | it's NULL. If needed for threads, the alternative could lock a mutex, | |
3457 | or take other more complex action. */ | |
3458 | ||
5b9c0671 NC |
3459 | /* Something changed in %^H, so it will need to be restored on scope exit. |
3460 | Doing this here saves a lot of doing it manually in perl code (and | |
3461 | forgetting to do it, and consequent subtle errors. */ | |
3462 | PL_hints |= HINT_LOCALIZE_HH; | |
20439bc7 Z |
3463 | CopHINTHASH_set(&PL_compiling, |
3464 | cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0)); | |
b3ca2e83 NC |
3465 | return 0; |
3466 | } | |
3467 | ||
3468 | /* | |
f175cff5 |