1 | /* |
---|
2 | * $Id$ |
---|
3 | */ |
---|
4 | |
---|
5 | #include <assert.h> |
---|
6 | #include <errno.h> |
---|
7 | #include <signal.h> |
---|
8 | |
---|
9 | #include <rtems/system.h> |
---|
10 | #include <rtems/score/isr.h> |
---|
11 | #include <rtems/score/thread.h> |
---|
12 | #include <rtems/posix/seterr.h> |
---|
13 | #include <rtems/posix/threadsup.h> |
---|
14 | #include <rtems/posix/pthread.h> |
---|
15 | |
---|
16 | /* |
---|
17 | * Currently 32 signals numbered 1-32 are defined |
---|
18 | */ |
---|
19 | |
---|
20 | #define SIGNAL_EMPTY_MASK 0x00000000 |
---|
21 | #define SIGNAL_ALL_MASK 0xffffffff |
---|
22 | |
---|
23 | #define signo_to_mask( _sig ) (1 << ((_sig) - 1)) |
---|
24 | |
---|
25 | #define is_valid_signo( _sig ) \ |
---|
26 | ((_sig) >= 1 && (_sig) <= 32 ) |
---|
27 | |
---|
28 | /*** PROCESS WIDE STUFF ****/ |
---|
29 | |
---|
30 | sigset_t _POSIX_signals_Pending; |
---|
31 | sigset_t _POSIX_signals_Ignored; |
---|
32 | |
---|
33 | #define _POSIX_signals_Abormal_termination_handler NULL |
---|
34 | #define _POSIX_signals_Stop_handler NULL |
---|
35 | #define _POSIX_signals_Continue_handler NULL |
---|
36 | |
---|
37 | #define SIGACTION_TERMINATE \ |
---|
38 | { 0, SIGNAL_ALL_MASK, {_POSIX_signals_Abormal_termination_handler} } |
---|
39 | #define SIGACTION_IGNORE \ |
---|
40 | { 0, SIGNAL_ALL_MASK, {SIG_IGN} } |
---|
41 | #define SIGACTION_STOP \ |
---|
42 | { 0, SIGNAL_ALL_MASK, {_POSIX_signals_Stop_handler} } |
---|
43 | #define SIGACTION_CONTINUE \ |
---|
44 | { 0, SIGNAL_ALL_MASK, {_POSIX_signals_Continue_handler} } |
---|
45 | |
---|
46 | #define SIG_ARRAY_MAX (SIGRTMAX + 1) |
---|
47 | struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = { |
---|
48 | /* NO SIGNAL 0 */ SIGACTION_IGNORE, |
---|
49 | /* SIGABRT */ SIGACTION_TERMINATE, |
---|
50 | /* SIGALRM */ SIGACTION_TERMINATE, |
---|
51 | /* SIGFPE */ SIGACTION_TERMINATE, |
---|
52 | /* SIGHUP */ SIGACTION_TERMINATE, |
---|
53 | /* SIGILL */ SIGACTION_TERMINATE, |
---|
54 | /* SIGINT */ SIGACTION_TERMINATE, |
---|
55 | /* SIGKILL */ SIGACTION_TERMINATE, |
---|
56 | /* SIGPIPE */ SIGACTION_TERMINATE, |
---|
57 | /* SIGQUIT */ SIGACTION_TERMINATE, |
---|
58 | /* SIGSEGV */ SIGACTION_TERMINATE, |
---|
59 | /* SIGTERM */ SIGACTION_TERMINATE, |
---|
60 | /* SIGUSR1 */ SIGACTION_TERMINATE, |
---|
61 | /* SIGUSR2 */ SIGACTION_TERMINATE, |
---|
62 | /* SIGCHLD */ SIGACTION_IGNORE, |
---|
63 | /* SIGCONT */ SIGACTION_CONTINUE, |
---|
64 | /* SIGSTOP */ SIGACTION_STOP, |
---|
65 | /* SIGTSTP */ SIGACTION_STOP, |
---|
66 | /* SIGTTIN */ SIGACTION_STOP, |
---|
67 | /* SIGTTOU */ SIGACTION_STOP, |
---|
68 | /* SIGBUS */ SIGACTION_TERMINATE, |
---|
69 | /* SIGRTMIN 21 */ SIGACTION_IGNORE, |
---|
70 | /* SIGRT 22 */ SIGACTION_IGNORE, |
---|
71 | /* SIGRT 23 */ SIGACTION_IGNORE, |
---|
72 | /* SIGRT 24 */ SIGACTION_IGNORE, |
---|
73 | /* SIGRT 25 */ SIGACTION_IGNORE, |
---|
74 | /* SIGRT 26 */ SIGACTION_IGNORE, |
---|
75 | /* SIGRT 27 */ SIGACTION_IGNORE, |
---|
76 | /* SIGRT 28 */ SIGACTION_IGNORE, |
---|
77 | /* SIGRT 29 */ SIGACTION_IGNORE, |
---|
78 | /* SIGRT 30 */ SIGACTION_IGNORE, |
---|
79 | /* SIGRT 31 */ SIGACTION_IGNORE, |
---|
80 | /* SIGRTMAX 32 */ SIGACTION_IGNORE |
---|
81 | }; |
---|
82 | |
---|
83 | struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ]; |
---|
84 | |
---|
85 | Watchdog_Control _POSIX_signals_Alarm_timer; |
---|
86 | |
---|
87 | typedef struct { |
---|
88 | Chain_Node Node; |
---|
89 | siginfo_t Info; |
---|
90 | } POSIX_signals_Siginfo_node; |
---|
91 | |
---|
92 | Chain_Control _POSIX_signals_Inactive_siginfo; |
---|
93 | Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ]; |
---|
94 | |
---|
95 | /*PAGE |
---|
96 | * |
---|
97 | * XXX |
---|
98 | */ |
---|
99 | |
---|
100 | boolean _POSIX_signals_Check_signal( |
---|
101 | POSIX_API_Control *api, |
---|
102 | int signo, |
---|
103 | boolean is_global |
---|
104 | ) |
---|
105 | { |
---|
106 | sigset_t mask; |
---|
107 | ISR_Level level; |
---|
108 | boolean do_callout; |
---|
109 | siginfo_t *siginfo = NULL; /* really needs to be set below */ |
---|
110 | siginfo_t siginfo_struct; |
---|
111 | |
---|
112 | mask = signo_to_mask( signo ); |
---|
113 | |
---|
114 | do_callout = FALSE; |
---|
115 | |
---|
116 | _ISR_Disable( level ); |
---|
117 | if ( is_global ) { |
---|
118 | ; |
---|
119 | /* XXX check right place for thread versus global */ |
---|
120 | } else { |
---|
121 | if ( mask & (api->signals_pending & ~api->signals_blocked ) ) { |
---|
122 | api->signals_pending &= ~mask; |
---|
123 | do_callout = TRUE; |
---|
124 | } |
---|
125 | } |
---|
126 | _ISR_Enable( level ); |
---|
127 | |
---|
128 | if ( !do_callout ) |
---|
129 | return FALSE; |
---|
130 | |
---|
131 | /* |
---|
132 | * Since we made a union of these, only one test is necessary but this is |
---|
133 | * safer. |
---|
134 | */ |
---|
135 | |
---|
136 | assert( _POSIX_signals_Vectors[ signo ].sa_handler || |
---|
137 | _POSIX_signals_Vectors[ signo ].sa_sigaction ); |
---|
138 | |
---|
139 | switch ( _POSIX_signals_Vectors[ signo ].sa_flags ) { |
---|
140 | case SA_SIGINFO: |
---|
141 | assert( 0 ); /* XXX we haven't completely implemented this yet */ |
---|
142 | if ( !is_global ) { |
---|
143 | siginfo = &siginfo_struct; |
---|
144 | siginfo->si_signo = signo; |
---|
145 | siginfo->si_code = SI_USER; |
---|
146 | siginfo->si_value.sival_int = 0; |
---|
147 | } |
---|
148 | (*_POSIX_signals_Vectors[ signo ].sa_sigaction)( |
---|
149 | signo, |
---|
150 | siginfo, |
---|
151 | NULL /* context is undefined per 1003.1b-1993, p. 66 */ |
---|
152 | ); |
---|
153 | break; |
---|
154 | default: |
---|
155 | (*_POSIX_signals_Vectors[ signo ].sa_handler)( signo ); |
---|
156 | break; |
---|
157 | } |
---|
158 | return TRUE; |
---|
159 | } |
---|
160 | |
---|
161 | void _POSIX_signals_Post_switch_extension( |
---|
162 | Thread_Control *the_thread |
---|
163 | ) |
---|
164 | { |
---|
165 | POSIX_API_Control *api; |
---|
166 | int signo; |
---|
167 | |
---|
168 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
169 | |
---|
170 | /* |
---|
171 | * If we invoke any user code, there is the possibility that |
---|
172 | * a new signal has been posted that we should process. |
---|
173 | */ |
---|
174 | |
---|
175 | /* XXX somewhere we need to see if all pending signals are gone and clear */ |
---|
176 | /* XXX do_post_switch_extension */ |
---|
177 | |
---|
178 | restart: |
---|
179 | for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) { |
---|
180 | |
---|
181 | if ( _POSIX_signals_Check_signal( api, signo, FALSE ) ) |
---|
182 | goto restart; |
---|
183 | |
---|
184 | if ( _POSIX_signals_Check_signal( api, signo, TRUE ) ) |
---|
185 | goto restart; |
---|
186 | |
---|
187 | } |
---|
188 | |
---|
189 | for ( signo = SIGABRT ; signo <= SIGBUS ; signo++ ) { |
---|
190 | |
---|
191 | if ( _POSIX_signals_Check_signal( api, signo, FALSE ) ) |
---|
192 | goto restart; |
---|
193 | |
---|
194 | if ( _POSIX_signals_Check_signal( api, signo, TRUE ) ) |
---|
195 | goto restart; |
---|
196 | |
---|
197 | } |
---|
198 | |
---|
199 | } |
---|
200 | |
---|
201 | /*PAGE |
---|
202 | * |
---|
203 | * _POSIX_signals_Alarm_TSR |
---|
204 | */ |
---|
205 | |
---|
206 | void _POSIX_signals_Alarm_TSR( |
---|
207 | Objects_Id id, |
---|
208 | void *argument |
---|
209 | ) |
---|
210 | { |
---|
211 | kill( getpid(), SIGALRM ); |
---|
212 | } |
---|
213 | |
---|
214 | /*PAGE |
---|
215 | * |
---|
216 | * _POSIX_signals_Manager_Initialization |
---|
217 | */ |
---|
218 | |
---|
219 | void _POSIX_signals_Manager_Initialization( void ) |
---|
220 | { |
---|
221 | unsigned32 signo; |
---|
222 | |
---|
223 | /* |
---|
224 | * Insure we have the same number of vectors and default vector entries |
---|
225 | */ |
---|
226 | |
---|
227 | assert( |
---|
228 | sizeof(_POSIX_signals_Vectors) == sizeof(_POSIX_signals_Default_vectors) |
---|
229 | ); |
---|
230 | |
---|
231 | memcpy( |
---|
232 | _POSIX_signals_Vectors, |
---|
233 | _POSIX_signals_Default_vectors, |
---|
234 | sizeof( _POSIX_signals_Vectors ) |
---|
235 | ); |
---|
236 | |
---|
237 | /* |
---|
238 | * Initialize the set of pending signals for the entire process |
---|
239 | */ |
---|
240 | |
---|
241 | sigemptyset( &_POSIX_signals_Pending ); |
---|
242 | |
---|
243 | /* |
---|
244 | * Calculate the mask for the set of signals which are being ignored. |
---|
245 | */ |
---|
246 | |
---|
247 | sigemptyset( &_POSIX_signals_Ignored ); |
---|
248 | |
---|
249 | for ( signo=1 ; signo<= SIGRTMAX ; signo++ ) |
---|
250 | if ( _POSIX_signals_Default_vectors[ signo ].sa_handler == SIG_IGN ) |
---|
251 | sigaddset( &_POSIX_signals_Ignored, signo ); |
---|
252 | |
---|
253 | /* |
---|
254 | * Initialize the timer used to implement alarm(). |
---|
255 | */ |
---|
256 | |
---|
257 | _Watchdog_Initialize( |
---|
258 | &_POSIX_signals_Alarm_timer, |
---|
259 | _POSIX_signals_Alarm_TSR, |
---|
260 | 0, |
---|
261 | NULL |
---|
262 | ); |
---|
263 | |
---|
264 | /* |
---|
265 | * XXX Allocate the siginfo pools. |
---|
266 | */ |
---|
267 | |
---|
268 | for ( signo=1 ; signo<= SIGRTMAX ; signo++ ) |
---|
269 | _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] ); |
---|
270 | |
---|
271 | /* XXX especially the inactive pool */ |
---|
272 | } |
---|
273 | |
---|
274 | /* |
---|
275 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
276 | */ |
---|
277 | |
---|
278 | int sigemptyset( |
---|
279 | sigset_t *set |
---|
280 | ) |
---|
281 | { |
---|
282 | if ( !set ) |
---|
283 | set_errno_and_return_minus_one( EFAULT ); |
---|
284 | |
---|
285 | *set = 0; |
---|
286 | return 0; |
---|
287 | } |
---|
288 | |
---|
289 | /* |
---|
290 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
291 | */ |
---|
292 | |
---|
293 | int sigfillset( |
---|
294 | sigset_t *set |
---|
295 | ) |
---|
296 | { |
---|
297 | if ( !set ) |
---|
298 | set_errno_and_return_minus_one( EFAULT ); |
---|
299 | |
---|
300 | *set = SIGNAL_ALL_MASK; |
---|
301 | return 0; |
---|
302 | } |
---|
303 | |
---|
304 | /* |
---|
305 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
306 | */ |
---|
307 | |
---|
308 | int sigaddset( |
---|
309 | sigset_t *set, |
---|
310 | int signo |
---|
311 | ) |
---|
312 | { |
---|
313 | if ( !set ) |
---|
314 | set_errno_and_return_minus_one( EFAULT ); |
---|
315 | |
---|
316 | if ( !is_valid_signo(signo) ) |
---|
317 | set_errno_and_return_minus_one( EINVAL ); |
---|
318 | |
---|
319 | *set |= signo_to_mask(signo); |
---|
320 | return 0; |
---|
321 | } |
---|
322 | |
---|
323 | /* |
---|
324 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
325 | */ |
---|
326 | |
---|
327 | int sigdelset( |
---|
328 | sigset_t *set, |
---|
329 | int signo |
---|
330 | ) |
---|
331 | { |
---|
332 | if ( !set ) |
---|
333 | set_errno_and_return_minus_one( EFAULT ); |
---|
334 | |
---|
335 | if ( !is_valid_signo(signo) ) |
---|
336 | set_errno_and_return_minus_one( EINVAL ); |
---|
337 | |
---|
338 | *set &= ~signo_to_mask(signo); |
---|
339 | return 0; |
---|
340 | } |
---|
341 | |
---|
342 | /* |
---|
343 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
344 | */ |
---|
345 | |
---|
346 | int sigismember( |
---|
347 | const sigset_t *set, |
---|
348 | int signo |
---|
349 | ) |
---|
350 | { |
---|
351 | if ( !set ) |
---|
352 | set_errno_and_return_minus_one( EFAULT ); |
---|
353 | |
---|
354 | if ( !is_valid_signo(signo) ) |
---|
355 | set_errno_and_return_minus_one( EINVAL ); |
---|
356 | |
---|
357 | if ( *set & signo_to_mask(signo) ) |
---|
358 | return 1; |
---|
359 | |
---|
360 | return 0; |
---|
361 | } |
---|
362 | |
---|
363 | /* |
---|
364 | * 3.3.4 Examine and Change Signal Action, P1003.1b-1993, p. 70 |
---|
365 | */ |
---|
366 | |
---|
367 | int sigaction( |
---|
368 | int sig, |
---|
369 | const struct sigaction *act, |
---|
370 | struct sigaction *oact |
---|
371 | ) |
---|
372 | { |
---|
373 | if ( !act ) |
---|
374 | set_errno_and_return_minus_one( EFAULT ); |
---|
375 | |
---|
376 | if ( !is_valid_signo(sig) ) |
---|
377 | set_errno_and_return_minus_one( EINVAL ); |
---|
378 | |
---|
379 | if ( oact ) |
---|
380 | *oact = _POSIX_signals_Vectors[ sig ]; |
---|
381 | |
---|
382 | /* XXX need to interpret some stuff here */ |
---|
383 | /* XXX some signals cannot be ignored */ |
---|
384 | |
---|
385 | _POSIX_signals_Vectors[ sig ] = *act; |
---|
386 | |
---|
387 | return 0; |
---|
388 | } |
---|
389 | |
---|
390 | /* |
---|
391 | * 3.3.5 Examine and Change Blocked Signals, P1003.1b-1993, p. 73 |
---|
392 | * |
---|
393 | * NOTE: P1003.1c/D10, p. 37 adds pthread_sigmask(). |
---|
394 | * |
---|
395 | */ |
---|
396 | |
---|
397 | int sigprocmask( |
---|
398 | int how, |
---|
399 | const sigset_t *set, |
---|
400 | sigset_t *oset |
---|
401 | ) |
---|
402 | { |
---|
403 | /* |
---|
404 | * P1003.1c/Draft 10, p. 38 maps sigprocmask to pthread_sigmask. |
---|
405 | */ |
---|
406 | |
---|
407 | return pthread_sigmask( how, set, oset ); |
---|
408 | } |
---|
409 | |
---|
410 | /* |
---|
411 | * 3.3.5 Examine and Change Blocked Signals, P1003.1b-1993, p. 73 |
---|
412 | * |
---|
413 | * NOTE: P1003.1c/D10, p. 37 adds pthread_sigmask(). |
---|
414 | */ |
---|
415 | |
---|
416 | int pthread_sigmask( |
---|
417 | int how, |
---|
418 | const sigset_t *set, |
---|
419 | sigset_t *oset |
---|
420 | ) |
---|
421 | { |
---|
422 | POSIX_API_Control *api; |
---|
423 | boolean evaluate_signals; |
---|
424 | |
---|
425 | /* XXX some signals can not be ignored */ |
---|
426 | |
---|
427 | if ( !set && !oset ) |
---|
428 | set_errno_and_return_minus_one( EFAULT ); |
---|
429 | |
---|
430 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
431 | |
---|
432 | if ( oset ) |
---|
433 | *oset = api->signals_blocked; |
---|
434 | |
---|
435 | if ( !set ) |
---|
436 | set_errno_and_return_minus_one( EFAULT ); |
---|
437 | |
---|
438 | evaluate_signals = TRUE; |
---|
439 | |
---|
440 | switch ( how ) { |
---|
441 | case SIG_BLOCK: |
---|
442 | api->signals_blocked |= *set; |
---|
443 | evaluate_signals = FALSE; |
---|
444 | break; |
---|
445 | case SIG_UNBLOCK: |
---|
446 | api->signals_blocked &= ~*set; |
---|
447 | break; |
---|
448 | case SIG_SETMASK: |
---|
449 | api->signals_blocked = *set; |
---|
450 | break; |
---|
451 | default: |
---|
452 | set_errno_and_return_minus_one( EINVAL ); |
---|
453 | } |
---|
454 | |
---|
455 | /* XXX are there critical section problems here? */ |
---|
456 | |
---|
457 | /* XXX evaluate the new set */ |
---|
458 | |
---|
459 | if ( evaluate_signals == TRUE ) { |
---|
460 | if ( ~api->signals_blocked & |
---|
461 | (api->signals_pending | _POSIX_signals_Pending) ) { |
---|
462 | api->signals_global_pending &= _POSIX_signals_Pending; |
---|
463 | _Thread_Executing->do_post_task_switch_extension = TRUE; |
---|
464 | _Thread_Dispatch(); |
---|
465 | } |
---|
466 | } |
---|
467 | |
---|
468 | return 0; |
---|
469 | } |
---|
470 | |
---|
471 | /* |
---|
472 | * 3.3.6 Examine Pending Signals, P1003.1b-1993, p. 75 |
---|
473 | */ |
---|
474 | |
---|
475 | int sigpending( |
---|
476 | sigset_t *set |
---|
477 | ) |
---|
478 | { |
---|
479 | POSIX_API_Control *api; |
---|
480 | |
---|
481 | if ( !set ) |
---|
482 | set_errno_and_return_minus_one( EFAULT ); |
---|
483 | |
---|
484 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
485 | |
---|
486 | *set = api->signals_pending | _POSIX_signals_Pending; |
---|
487 | |
---|
488 | return 0; |
---|
489 | } |
---|
490 | |
---|
491 | /* |
---|
492 | * 3.3.7 Wait for a Signal, P1003.1b-1993, p. 75 |
---|
493 | */ |
---|
494 | |
---|
495 | int sigsuspend( |
---|
496 | const sigset_t *sigmask |
---|
497 | ) |
---|
498 | { |
---|
499 | return POSIX_NOT_IMPLEMENTED(); |
---|
500 | } |
---|
501 | |
---|
502 | /* |
---|
503 | * 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
---|
504 | * |
---|
505 | * NOTE: P1003.1c/D10, p. 39 adds sigwait(). |
---|
506 | */ |
---|
507 | |
---|
508 | int sigwaitinfo( |
---|
509 | const sigset_t *set, |
---|
510 | siginfo_t *info |
---|
511 | ) |
---|
512 | { |
---|
513 | return POSIX_NOT_IMPLEMENTED(); |
---|
514 | } |
---|
515 | |
---|
516 | /* |
---|
517 | * 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
---|
518 | * |
---|
519 | * NOTE: P1003.1c/D10, p. 39 adds sigwait(). |
---|
520 | */ |
---|
521 | |
---|
522 | int sigtimedwait( |
---|
523 | const sigset_t *set, |
---|
524 | siginfo_t *info, |
---|
525 | const struct timespec *timeout |
---|
526 | ) |
---|
527 | { |
---|
528 | return POSIX_NOT_IMPLEMENTED(); |
---|
529 | } |
---|
530 | |
---|
531 | /* |
---|
532 | * 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
---|
533 | * |
---|
534 | * NOTE: P1003.1c/D10, p. 39 adds sigwait(). |
---|
535 | */ |
---|
536 | |
---|
537 | int sigwait( |
---|
538 | const sigset_t *set, |
---|
539 | int *sig |
---|
540 | ) |
---|
541 | { |
---|
542 | return POSIX_NOT_IMPLEMENTED(); |
---|
543 | } |
---|
544 | |
---|
545 | /* |
---|
546 | * 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 |
---|
547 | */ |
---|
548 | |
---|
549 | int sigqueue( |
---|
550 | pid_t pid, |
---|
551 | int signo, |
---|
552 | const union sigval value |
---|
553 | ) |
---|
554 | { |
---|
555 | return POSIX_NOT_IMPLEMENTED(); |
---|
556 | } |
---|
557 | |
---|
558 | /* |
---|
559 | * 3.3.2 Send a Signal to a Process, P1003.1b-1993, p. 68 |
---|
560 | * |
---|
561 | * NOTE: Behavior of kill() depends on _POSIX_SAVED_IDS. |
---|
562 | */ |
---|
563 | |
---|
564 | int kill( |
---|
565 | pid_t pid, |
---|
566 | int sig |
---|
567 | ) |
---|
568 | { |
---|
569 | /* |
---|
570 | * Only supported for the "calling process" (i.e. this node). |
---|
571 | */ |
---|
572 | |
---|
573 | if( pid != getpid() ); |
---|
574 | set_errno_and_return_minus_one( ESRCH ); |
---|
575 | |
---|
576 | if ( !sig || _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) |
---|
577 | return 0; |
---|
578 | |
---|
579 | /* SIGABRT comes from abort via assert and must work no matter what */ |
---|
580 | if ( sig == SIGABRT ) { |
---|
581 | exit( 1 ); |
---|
582 | } |
---|
583 | return POSIX_NOT_IMPLEMENTED(); |
---|
584 | } |
---|
585 | |
---|
586 | /* |
---|
587 | * 3.3.10 Send a Signal to a Thread, P1003.1c/D10, p. 43 |
---|
588 | */ |
---|
589 | |
---|
590 | int pthread_kill( |
---|
591 | pthread_t thread, |
---|
592 | int sig |
---|
593 | ) |
---|
594 | { |
---|
595 | POSIX_API_Control *api; |
---|
596 | Thread_Control *the_thread; |
---|
597 | Objects_Locations location; |
---|
598 | |
---|
599 | if ( sig && !is_valid_signo(sig) ) |
---|
600 | set_errno_and_return_minus_one( EINVAL ); |
---|
601 | |
---|
602 | if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) |
---|
603 | return 0; |
---|
604 | |
---|
605 | the_thread = _POSIX_Threads_Get( thread, &location ); |
---|
606 | switch ( location ) { |
---|
607 | case OBJECTS_ERROR: |
---|
608 | case OBJECTS_REMOTE: |
---|
609 | return ESRCH; |
---|
610 | case OBJECTS_LOCAL: |
---|
611 | /* |
---|
612 | * If sig == 0 then just validate arguments |
---|
613 | */ |
---|
614 | |
---|
615 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
616 | |
---|
617 | if ( sig ) { |
---|
618 | |
---|
619 | /* XXX critical section */ |
---|
620 | |
---|
621 | api->signals_pending |= signo_to_mask( sig ); |
---|
622 | |
---|
623 | if ( api->signals_pending & ~api->signals_blocked ) { |
---|
624 | the_thread->do_post_task_switch_extension = TRUE; |
---|
625 | |
---|
626 | |
---|
627 | /* XXX may have to unblock the task -- this is a kludge -- fix it */ |
---|
628 | if ( the_thread->current_state & STATES_INTERRUPTIBLE_BY_SIGNAL ) { |
---|
629 | the_thread->Wait.return_code = EINTR; |
---|
630 | if ( _States_Is_waiting_on_thread_queue(the_thread->current_state) ) |
---|
631 | _Thread_queue_Extract_with_proxy( the_thread ); |
---|
632 | else if ( _States_Is_delaying(the_thread->current_state)){ |
---|
633 | if ( _Watchdog_Is_active( &the_thread->Timer ) ) |
---|
634 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
635 | _Thread_Unblock( the_thread ); |
---|
636 | } |
---|
637 | } |
---|
638 | } |
---|
639 | } |
---|
640 | _Thread_Enable_dispatch(); |
---|
641 | return 0; |
---|
642 | } |
---|
643 | |
---|
644 | return POSIX_BOTTOM_REACHED(); |
---|
645 | } |
---|
646 | |
---|
647 | /* |
---|
648 | * 3.4.1 Schedule Alarm, P1003.1b-1993, p. 79 |
---|
649 | */ |
---|
650 | |
---|
651 | Watchdog_Control _POSIX_signals_Alarm_timer; |
---|
652 | |
---|
653 | unsigned int alarm( |
---|
654 | unsigned int seconds |
---|
655 | ) |
---|
656 | { |
---|
657 | unsigned int remaining = 0; |
---|
658 | Watchdog_Control *the_timer; |
---|
659 | |
---|
660 | the_timer = &_POSIX_signals_Alarm_timer; |
---|
661 | |
---|
662 | switch ( _Watchdog_Remove( the_timer ) ) { |
---|
663 | case WATCHDOG_INACTIVE: |
---|
664 | case WATCHDOG_BEING_INSERTED: |
---|
665 | break; |
---|
666 | |
---|
667 | case WATCHDOG_ACTIVE: |
---|
668 | case WATCHDOG_REMOVE_IT: |
---|
669 | remaining = the_timer->initial - |
---|
670 | (the_timer->stop_time - the_timer->start_time); |
---|
671 | break; |
---|
672 | } |
---|
673 | |
---|
674 | _Watchdog_Insert_seconds( the_timer, seconds ); |
---|
675 | |
---|
676 | return remaining; |
---|
677 | } |
---|
678 | |
---|
679 | /* |
---|
680 | * 3.4.2 Suspend Process Execution, P1003.1b-1993, p. 81 |
---|
681 | */ |
---|
682 | |
---|
683 | int pause( void ) |
---|
684 | { |
---|
685 | return POSIX_NOT_IMPLEMENTED(); |
---|
686 | } |
---|