Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
8429d022 | 2 | * Copyright (c) 1982, 1986, 1989, 1991 Regents of the University of California. |
d86a61ec | 3 | * All rights reserved. |
da7c5cc6 | 4 | * |
dbf0c423 | 5 | * %sccs.include.redist.c% |
d86a61ec | 6 | * |
8429d022 | 7 | * @(#)kern_sig.c 7.27 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
961945a8 | 9 | |
8429d022 | 10 | #define SIGPROP /* include signal properties table */ |
94368568 | 11 | #include "param.h" |
8429d022 MK |
12 | /*#include "signalvar.h" */ |
13 | #include "user.h" /* XXX */ | |
d86a61ec | 14 | #include "vnode.h" |
94368568 | 15 | #include "proc.h" |
8429d022 MK |
16 | #include "kinfo_proc.h" |
17 | #include "systm.h" | |
94368568 JB |
18 | #include "timeb.h" |
19 | #include "times.h" | |
94368568 | 20 | #include "buf.h" |
94368568 | 21 | #include "seg.h" |
94368568 | 22 | #include "acct.h" |
d86a61ec | 23 | #include "file.h" |
94368568 | 24 | #include "kernel.h" |
f4af9a5b | 25 | #include "wait.h" |
22585170 | 26 | #include "ktrace.h" |
687880f9 | 27 | |
9db58063 | 28 | #include "../vm/vm_param.h" |
d301d150 | 29 | |
2e143991 | 30 | /* |
8429d022 | 31 | * Can process p, with pcred pc, send the signal signo to process q? |
2e143991 | 32 | */ |
8429d022 MK |
33 | #define CANSIGNAL(p, pc, q, signo) \ |
34 | ((pc)->pc_ucred->cr_uid == 0 || \ | |
35 | (pc)->p_ruid == (q)->p_cred->p_ruid || \ | |
36 | (pc)->pc_ucred->cr_uid == (q)->p_cred->p_ruid || \ | |
37 | (pc)->p_ruid == (q)->p_ucred->cr_uid || \ | |
38 | (pc)->pc_ucred->cr_uid == (q)->p_ucred->cr_uid || \ | |
e635a749 MK |
39 | ((signo) == SIGCONT && (q)->p_session == (p)->p_session)) |
40 | ||
41 | /* ARGSUSED */ | |
42 | sigaction(p, uap, retval) | |
43 | struct proc *p; | |
44 | register struct args { | |
dd012d1e | 45 | int signo; |
f4af9a5b MK |
46 | struct sigaction *nsa; |
47 | struct sigaction *osa; | |
e635a749 MK |
48 | } *uap; |
49 | int *retval; | |
50 | { | |
f4af9a5b MK |
51 | struct sigaction vec; |
52 | register struct sigaction *sa; | |
8429d022 | 53 | register struct sigacts *ps = p->p_sigacts; |
dd012d1e | 54 | register int sig; |
f4af9a5b | 55 | int bit, error; |
dd012d1e SL |
56 | |
57 | sig = uap->signo; | |
f4af9a5b | 58 | if (sig <= 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP) |
d9c2f47f | 59 | return (EINVAL); |
f4af9a5b MK |
60 | sa = &vec; |
61 | if (uap->osa) { | |
8429d022 MK |
62 | sa->sa_handler = ps->ps_sigact[sig]; |
63 | sa->sa_mask = ps->ps_catchmask[sig]; | |
fe7f81f4 | 64 | bit = sigmask(sig); |
f4af9a5b | 65 | sa->sa_flags = 0; |
8429d022 | 66 | if ((ps->ps_sigonstack & bit) != 0) |
f4af9a5b | 67 | sa->sa_flags |= SA_ONSTACK; |
8429d022 | 68 | if ((ps->ps_sigintr & bit) == 0) |
f4af9a5b | 69 | sa->sa_flags |= SA_RESTART; |
e635a749 | 70 | if (p->p_flag & SNOCLDSTOP) |
f4af9a5b MK |
71 | sa->sa_flags |= SA_NOCLDSTOP; |
72 | if (error = copyout((caddr_t)sa, (caddr_t)uap->osa, | |
73 | sizeof (vec))) | |
d9c2f47f | 74 | return (error); |
457aa395 | 75 | } |
f4af9a5b MK |
76 | if (uap->nsa) { |
77 | if (error = copyin((caddr_t)uap->nsa, (caddr_t)sa, | |
78 | sizeof (vec))) | |
d9c2f47f | 79 | return (error); |
e635a749 | 80 | setsigvec(p, sig, sa); |
457aa395 | 81 | } |
d9c2f47f | 82 | return (0); |
dd012d1e | 83 | } |
4147b3f6 | 84 | |
e635a749 MK |
85 | setsigvec(p, sig, sa) |
86 | register struct proc *p; | |
457aa395 | 87 | int sig; |
f4af9a5b | 88 | register struct sigaction *sa; |
dd012d1e | 89 | { |
8429d022 | 90 | register struct sigacts *ps = p->p_sigacts; |
457aa395 | 91 | register int bit; |
dd012d1e | 92 | |
feff6b5a | 93 | bit = sigmask(sig); |
dd012d1e SL |
94 | /* |
95 | * Change setting atomically. | |
96 | */ | |
feff6b5a | 97 | (void) splhigh(); |
8429d022 MK |
98 | ps->ps_sigact[sig] = sa->sa_handler; |
99 | ps->ps_catchmask[sig] = sa->sa_mask &~ sigcantmask; | |
f4af9a5b | 100 | if ((sa->sa_flags & SA_RESTART) == 0) |
8429d022 | 101 | ps->ps_sigintr |= bit; |
fe7f81f4 | 102 | else |
8429d022 | 103 | ps->ps_sigintr &= ~bit; |
f4af9a5b | 104 | if (sa->sa_flags & SA_ONSTACK) |
8429d022 | 105 | ps->ps_sigonstack |= bit; |
457aa395 | 106 | else |
8429d022 | 107 | ps->ps_sigonstack &= ~bit; |
f4af9a5b MK |
108 | if (sig == SIGCHLD) { |
109 | if (sa->sa_flags & SA_NOCLDSTOP) | |
110 | p->p_flag |= SNOCLDSTOP; | |
111 | else | |
112 | p->p_flag &= ~SNOCLDSTOP; | |
113 | } | |
114 | /* | |
115 | * Set bit in p_sigignore for signals that are set to SIG_IGN, | |
116 | * and for signals set to SIG_DFL where the default is to ignore. | |
117 | * However, don't put SIGCONT in p_sigignore, | |
118 | * as we have to restart the process. | |
119 | */ | |
120 | if (sa->sa_handler == SIG_IGN || | |
8429d022 | 121 | (sigprop[sig] & SA_IGNORE && sa->sa_handler == SIG_DFL)) { |
457aa395 | 122 | p->p_sig &= ~bit; /* never to be seen again */ |
f4af9a5b MK |
123 | if (sig != SIGCONT) |
124 | p->p_sigignore |= bit; /* easier in psignal */ | |
457aa395 | 125 | p->p_sigcatch &= ~bit; |
dd012d1e | 126 | } else { |
457aa395 | 127 | p->p_sigignore &= ~bit; |
f4af9a5b | 128 | if (sa->sa_handler == SIG_DFL) |
457aa395 | 129 | p->p_sigcatch &= ~bit; |
dd012d1e | 130 | else |
457aa395 | 131 | p->p_sigcatch |= bit; |
dd012d1e SL |
132 | } |
133 | (void) spl0(); | |
4147b3f6 BJ |
134 | } |
135 | ||
f4af9a5b MK |
136 | /* |
137 | * Initialize signal state for process 0; | |
138 | * set to ignore signals that are ignored by default. | |
139 | */ | |
8429d022 | 140 | void |
f4af9a5b MK |
141 | siginit(p) |
142 | struct proc *p; | |
143 | { | |
8429d022 | 144 | register int i; |
f4af9a5b | 145 | |
8429d022 MK |
146 | for (i = 0; i < NSIG; i++) |
147 | if (sigprop[i] & SA_IGNORE && i != SIGCONT) | |
148 | p->p_sigignore |= sigmask(i); | |
f4af9a5b MK |
149 | } |
150 | ||
151 | /* | |
152 | * Reset signals for an exec of the specified process. | |
153 | */ | |
8429d022 | 154 | void |
f4af9a5b MK |
155 | execsigs(p) |
156 | register struct proc *p; | |
157 | { | |
8429d022 | 158 | register struct sigacts *ps = p->p_sigacts; |
f4af9a5b MK |
159 | register int nc, mask; |
160 | ||
161 | /* | |
162 | * Reset caught signals. Held signals remain held | |
163 | * through p_sigmask (unless they were caught, | |
164 | * and are now ignored by default). | |
165 | */ | |
166 | while (p->p_sigcatch) { | |
167 | nc = ffs((long)p->p_sigcatch); | |
168 | mask = sigmask(nc); | |
169 | p->p_sigcatch &= ~mask; | |
8429d022 | 170 | if (sigprop[nc] & SA_IGNORE) { |
f4af9a5b MK |
171 | if (nc != SIGCONT) |
172 | p->p_sigignore |= mask; | |
173 | p->p_sig &= ~mask; | |
174 | } | |
8429d022 | 175 | ps->ps_sigact[nc] = SIG_DFL; |
f4af9a5b MK |
176 | } |
177 | /* | |
178 | * Reset stack state to the user stack. | |
179 | * Clear set of signals caught on the signal stack. | |
180 | */ | |
8429d022 MK |
181 | ps->ps_onstack = 0; |
182 | ps->ps_sigsp = 0; | |
183 | ps->ps_sigonstack = 0; | |
f4af9a5b MK |
184 | } |
185 | ||
186 | /* | |
187 | * Manipulate signal mask. | |
188 | * Note that we receive new mask, not pointer, | |
189 | * and return old mask as return value; | |
190 | * the library stub does the rest. | |
191 | */ | |
e635a749 MK |
192 | sigprocmask(p, uap, retval) |
193 | register struct proc *p; | |
194 | struct args { | |
f4af9a5b MK |
195 | int how; |
196 | sigset_t mask; | |
e635a749 MK |
197 | } *uap; |
198 | int *retval; | |
199 | { | |
f4af9a5b MK |
200 | int error = 0; |
201 | ||
e635a749 | 202 | *retval = p->p_sigmask; |
f4af9a5b MK |
203 | (void) splhigh(); |
204 | ||
205 | switch (uap->how) { | |
206 | case SIG_BLOCK: | |
207 | p->p_sigmask |= uap->mask &~ sigcantmask; | |
208 | break; | |
209 | ||
210 | case SIG_UNBLOCK: | |
211 | p->p_sigmask &= ~uap->mask; | |
212 | break; | |
213 | ||
214 | case SIG_SETMASK: | |
215 | p->p_sigmask = uap->mask &~ sigcantmask; | |
216 | break; | |
217 | ||
218 | default: | |
219 | error = EINVAL; | |
220 | break; | |
221 | } | |
222 | (void) spl0(); | |
d9c2f47f | 223 | return (error); |
f4af9a5b MK |
224 | } |
225 | ||
e635a749 MK |
226 | /* ARGSUSED */ |
227 | sigpending(p, uap, retval) | |
228 | struct proc *p; | |
229 | void *uap; | |
230 | int *retval; | |
f4af9a5b MK |
231 | { |
232 | ||
e635a749 | 233 | *retval = p->p_sig; |
d9c2f47f | 234 | return (0); |
f4af9a5b MK |
235 | } |
236 | ||
237 | #ifdef COMPAT_43 | |
238 | /* | |
239 | * Generalized interface signal handler, 4.3-compatible. | |
240 | */ | |
e635a749 MK |
241 | /* ARGSUSED */ |
242 | osigvec(p, uap, retval) | |
243 | struct proc *p; | |
244 | register struct args { | |
f4af9a5b MK |
245 | int signo; |
246 | struct sigvec *nsv; | |
247 | struct sigvec *osv; | |
e635a749 MK |
248 | } *uap; |
249 | int *retval; | |
250 | { | |
f4af9a5b | 251 | struct sigvec vec; |
8429d022 | 252 | register struct sigacts *ps = p->p_sigacts; |
f4af9a5b MK |
253 | register struct sigvec *sv; |
254 | register int sig; | |
255 | int bit, error; | |
256 | ||
257 | sig = uap->signo; | |
258 | if (sig <= 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP) | |
d9c2f47f | 259 | return (EINVAL); |
f4af9a5b MK |
260 | sv = &vec; |
261 | if (uap->osv) { | |
8429d022 MK |
262 | *(sig_t *)&sv->sv_handler = ps->ps_sigact[sig]; |
263 | sv->sv_mask = ps->ps_catchmask[sig]; | |
f4af9a5b MK |
264 | bit = sigmask(sig); |
265 | sv->sv_flags = 0; | |
8429d022 | 266 | if ((ps->ps_sigonstack & bit) != 0) |
f4af9a5b | 267 | sv->sv_flags |= SV_ONSTACK; |
8429d022 | 268 | if ((ps->ps_sigintr & bit) != 0) |
f4af9a5b | 269 | sv->sv_flags |= SV_INTERRUPT; |
e635a749 | 270 | if (p->p_flag & SNOCLDSTOP) |
f4af9a5b MK |
271 | sv->sv_flags |= SA_NOCLDSTOP; |
272 | if (error = copyout((caddr_t)sv, (caddr_t)uap->osv, | |
273 | sizeof (vec))) | |
d9c2f47f | 274 | return (error); |
f4af9a5b MK |
275 | } |
276 | if (uap->nsv) { | |
277 | if (error = copyin((caddr_t)uap->nsv, (caddr_t)sv, | |
278 | sizeof (vec))) | |
d9c2f47f | 279 | return (error); |
f4af9a5b | 280 | sv->sv_flags ^= SA_RESTART; /* opposite of SV_INTERRUPT */ |
e635a749 | 281 | setsigvec(p, sig, (struct sigaction *)sv); |
f4af9a5b | 282 | } |
d9c2f47f | 283 | return (0); |
f4af9a5b MK |
284 | } |
285 | ||
e635a749 MK |
286 | osigblock(p, uap, retval) |
287 | register struct proc *p; | |
288 | struct args { | |
feff6b5a | 289 | int mask; |
e635a749 MK |
290 | } *uap; |
291 | int *retval; | |
292 | { | |
4147b3f6 | 293 | |
feff6b5a | 294 | (void) splhigh(); |
e635a749 | 295 | *retval = p->p_sigmask; |
f4af9a5b | 296 | p->p_sigmask |= uap->mask &~ sigcantmask; |
dd012d1e | 297 | (void) spl0(); |
d9c2f47f | 298 | return (0); |
4147b3f6 BJ |
299 | } |
300 | ||
e635a749 MK |
301 | osigsetmask(p, uap, retval) |
302 | struct proc *p; | |
303 | struct args { | |
feff6b5a | 304 | int mask; |
e635a749 MK |
305 | } *uap; |
306 | int *retval; | |
307 | { | |
687880f9 | 308 | |
feff6b5a | 309 | (void) splhigh(); |
e635a749 | 310 | *retval = p->p_sigmask; |
f4af9a5b | 311 | p->p_sigmask = uap->mask &~ sigcantmask; |
dd012d1e | 312 | (void) spl0(); |
d9c2f47f | 313 | return (0); |
687880f9 | 314 | } |
f4af9a5b | 315 | #endif |
687880f9 | 316 | |
f4af9a5b MK |
317 | /* |
318 | * Suspend process until signal, providing mask to be set | |
319 | * in the meantime. Note nonstandard calling convention: | |
320 | * libc stub passes mask, not pointer, to save a copyin. | |
321 | */ | |
e635a749 MK |
322 | /* ARGSUSED */ |
323 | sigsuspend(p, uap, retval) | |
324 | register struct proc *p; | |
325 | struct args { | |
f4af9a5b | 326 | sigset_t mask; |
e635a749 MK |
327 | } *uap; |
328 | int *retval; | |
329 | { | |
8429d022 | 330 | register struct sigacts *ps = p->p_sigacts; |
4147b3f6 | 331 | |
dd012d1e SL |
332 | /* |
333 | * When returning from sigpause, we want | |
334 | * the old mask to be restored after the | |
335 | * signal handler has finished. Thus, we | |
336 | * save it here and mark the proc structure | |
8429d022 | 337 | * to indicate this (should be in sigacts). |
dd012d1e | 338 | */ |
8429d022 MK |
339 | ps->ps_oldmask = p->p_sigmask; |
340 | ps->ps_flags |= SA_OLDMASK; | |
f4af9a5b | 341 | p->p_sigmask = uap->mask &~ sigcantmask; |
8429d022 | 342 | (void) tsleep((caddr_t) ps, PPAUSE|PCATCH, "pause", 0); |
22585170 | 343 | /* always return EINTR rather than ERESTART... */ |
d9c2f47f | 344 | return (EINTR); |
4147b3f6 BJ |
345 | } |
346 | ||
e635a749 MK |
347 | /* ARGSUSED */ |
348 | sigstack(p, uap, retval) | |
349 | struct proc *p; | |
350 | register struct args { | |
457aa395 SL |
351 | struct sigstack *nss; |
352 | struct sigstack *oss; | |
e635a749 MK |
353 | } *uap; |
354 | int *retval; | |
355 | { | |
457aa395 | 356 | struct sigstack ss; |
f4af9a5b MK |
357 | int error = 0; |
358 | ||
8429d022 | 359 | if (uap->oss && (error = copyout((caddr_t)&p->p_sigacts->ps_sigstack, |
f4af9a5b | 360 | (caddr_t)uap->oss, sizeof (struct sigstack)))) |
d9c2f47f | 361 | return (error); |
f4af9a5b MK |
362 | if (uap->nss && (error = copyin((caddr_t)uap->nss, (caddr_t)&ss, |
363 | sizeof (ss))) == 0) | |
8429d022 | 364 | p->p_sigacts->ps_sigstack = ss; |
d9c2f47f | 365 | return (error); |
4147b3f6 BJ |
366 | } |
367 | ||
e635a749 MK |
368 | /* ARGSUSED */ |
369 | kill(cp, uap, retval) | |
370 | register struct proc *cp; | |
371 | register struct args { | |
dd012d1e SL |
372 | int pid; |
373 | int signo; | |
e635a749 MK |
374 | } *uap; |
375 | int *retval; | |
376 | { | |
7713be67 | 377 | register struct proc *p; |
8429d022 | 378 | register struct pcred *pc = cp->p_cred; |
1e3738da | 379 | |
f4af9a5b | 380 | if ((unsigned) uap->signo >= NSIG) |
d9c2f47f | 381 | return (EINVAL); |
7713be67 KM |
382 | if (uap->pid > 0) { |
383 | /* kill single process */ | |
384 | p = pfind(uap->pid); | |
f4af9a5b | 385 | if (p == 0) |
d9c2f47f | 386 | return (ESRCH); |
8429d022 | 387 | if (!CANSIGNAL(cp, pc, p, uap->signo)) |
d9c2f47f | 388 | return (EPERM); |
f4af9a5b | 389 | if (uap->signo) |
7713be67 | 390 | psignal(p, uap->signo); |
d9c2f47f | 391 | return (0); |
7713be67 KM |
392 | } |
393 | switch (uap->pid) { | |
394 | case -1: /* broadcast signal */ | |
d9c2f47f | 395 | return (killpg1(cp, uap->signo, 0, 1)); |
7713be67 | 396 | case 0: /* signal own process group */ |
d9c2f47f | 397 | return (killpg1(cp, uap->signo, 0, 0)); |
7713be67 | 398 | default: /* negative explicit process group */ |
d9c2f47f | 399 | return (killpg1(cp, uap->signo, -uap->pid, 0)); |
7713be67 | 400 | } |
f4af9a5b | 401 | /* NOTREACHED */ |
1e3738da BJ |
402 | } |
403 | ||
f4af9a5b | 404 | #ifdef COMPAT_43 |
e635a749 MK |
405 | /* ARGSUSED */ |
406 | okillpg(p, uap, retval) | |
407 | struct proc *p; | |
408 | register struct args { | |
8fe87cbb | 409 | int pgid; |
3b4f6e10 | 410 | int signo; |
e635a749 MK |
411 | } *uap; |
412 | int *retval; | |
413 | { | |
1e3738da | 414 | |
f4af9a5b | 415 | if ((unsigned) uap->signo >= NSIG) |
d9c2f47f MK |
416 | return (EINVAL); |
417 | return (killpg1(p, uap->signo, uap->pgid, 0)); | |
1e3738da | 418 | } |
f4af9a5b | 419 | #endif |
dd012d1e | 420 | |
e635a749 MK |
421 | /* |
422 | * Common code for kill process group/broadcast kill. | |
423 | * cp is calling process. | |
424 | */ | |
425 | killpg1(cp, signo, pgid, all) | |
426 | register struct proc *cp; | |
8fe87cbb | 427 | int signo, pgid, all; |
3b4f6e10 SL |
428 | { |
429 | register struct proc *p; | |
8429d022 | 430 | register struct pcred *pc = cp->p_cred; |
8fe87cbb | 431 | struct pgrp *pgrp; |
8429d022 | 432 | int nfound = 0; |
8fe87cbb MT |
433 | |
434 | if (all) | |
435 | /* | |
436 | * broadcast | |
687880f9 | 437 | */ |
8fe87cbb | 438 | for (p = allproc; p != NULL; p = p->p_nxt) { |
8429d022 MK |
439 | if (p->p_pid <= 1 || p->p_flag&SSYS || |
440 | p == cp || !CANSIGNAL(cp, pc, p, signo)) | |
8fe87cbb | 441 | continue; |
8429d022 | 442 | nfound++; |
8fe87cbb MT |
443 | if (signo) |
444 | psignal(p, signo); | |
445 | } | |
446 | else { | |
447 | if (pgid == 0) | |
448 | /* | |
449 | * zero pgid means send to my process group. | |
450 | */ | |
8429d022 | 451 | pgrp = cp->p_pgrp; |
8fe87cbb MT |
452 | else { |
453 | pgrp = pgfind(pgid); | |
454 | if (pgrp == NULL) | |
f4af9a5b | 455 | return (ESRCH); |
8fe87cbb | 456 | } |
8fe87cbb | 457 | for (p = pgrp->pg_mem; p != NULL; p = p->p_pgrpnxt) { |
8429d022 MK |
458 | if (p->p_pid <= 1 || p->p_flag&SSYS || |
459 | !CANSIGNAL(cp, pc, p, signo)) | |
8fe87cbb | 460 | continue; |
8429d022 | 461 | nfound++; |
8fe87cbb MT |
462 | if (signo) |
463 | psignal(p, signo); | |
7713be67 | 464 | } |
687880f9 | 465 | } |
8429d022 | 466 | return (nfound ? 0 : ESRCH); |
4147b3f6 | 467 | } |
687880f9 | 468 | |
e635a749 | 469 | /* |
687880f9 | 470 | * Send the specified signal to |
8fe87cbb | 471 | * all processes with 'pgid' as |
687880f9 | 472 | * process group. |
687880f9 | 473 | */ |
8429d022 | 474 | void |
8fe87cbb | 475 | gsignal(pgid, sig) |
8429d022 | 476 | int pgid, sig; |
8fe87cbb | 477 | { |
f4af9a5b | 478 | struct pgrp *pgrp; |
8fe87cbb | 479 | |
f4af9a5b | 480 | if (pgid && (pgrp = pgfind(pgid))) |
c697d0b9 | 481 | pgsignal(pgrp, sig, 0); |
8fe87cbb | 482 | } |
e635a749 | 483 | |
22585170 | 484 | /* |
c697d0b9 MT |
485 | * Send sig to every member of a process group. |
486 | * If checktty is 1, limit to members which have a controlling | |
487 | * terminal. | |
22585170 | 488 | */ |
8429d022 | 489 | void |
c697d0b9 | 490 | pgsignal(pgrp, sig, checkctty) |
f4af9a5b | 491 | struct pgrp *pgrp; |
8429d022 | 492 | int sig, checkctty; |
687880f9 BJ |
493 | { |
494 | register struct proc *p; | |
495 | ||
22585170 MT |
496 | if (pgrp) |
497 | for (p = pgrp->pg_mem; p != NULL; p = p->p_pgrpnxt) | |
c697d0b9 MT |
498 | if (checkctty == 0 || p->p_flag&SCTTY) |
499 | psignal(p, sig); | |
f4af9a5b MK |
500 | } |
501 | ||
502 | /* | |
503 | * Send a signal caused by a trap to the current process. | |
504 | * If it will be caught immediately, deliver it with correct code. | |
505 | * Otherwise, post it normally. | |
506 | */ | |
8429d022 MK |
507 | void |
508 | trapsignal(p, sig, code) | |
509 | struct proc *p; | |
f4af9a5b MK |
510 | register int sig; |
511 | unsigned code; | |
512 | { | |
8429d022 | 513 | register struct sigacts *ps = p->p_sigacts; |
f4af9a5b MK |
514 | int mask; |
515 | ||
516 | mask = sigmask(sig); | |
517 | if ((p->p_flag & STRC) == 0 && (p->p_sigcatch & mask) != 0 && | |
518 | (p->p_sigmask & mask) == 0) { | |
8429d022 | 519 | p->p_stats->p_ru.ru_nsignals++; |
22585170 MT |
520 | #ifdef KTRACE |
521 | if (KTRPOINT(p, KTR_PSIG)) | |
8429d022 | 522 | ktrpsig(p->p_tracep, sig, ps->ps_sigact[sig], |
22585170 MT |
523 | p->p_sigmask, code); |
524 | #endif | |
f9e4e2f4 | 525 | #if defined(i386) |
8429d022 | 526 | sendsig(ps->ps_sigact[sig], sig, p->p_sigmask, code, 0x100); |
f9e4e2f4 | 527 | #else |
8429d022 | 528 | sendsig(ps->ps_sigact[sig], sig, p->p_sigmask, code); |
f9e4e2f4 | 529 | #endif |
8429d022 | 530 | p->p_sigmask |= ps->ps_catchmask[sig] | mask; |
f4af9a5b | 531 | } else { |
8429d022 | 532 | ps->ps_code = code; /* XXX for core dump/debugger */ |
8fe87cbb | 533 | psignal(p, sig); |
f4af9a5b | 534 | } |
687880f9 BJ |
535 | } |
536 | ||
537 | /* | |
22585170 | 538 | * Send the specified signal to the specified process. |
8429d022 MK |
539 | * If the signal has an action, the action is usually performed |
540 | * by the target process rather than the caller; we simply add | |
541 | * the signal to the set of pending signals for the process. | |
22585170 MT |
542 | * Exceptions: |
543 | * o When a stop signal is sent to a sleeping process that takes the default | |
544 | * action, the process is stopped without awakening it. | |
545 | * o SIGCONT restarts stopped processes (or puts them back to sleep) | |
546 | * regardless of the signal action (eg, blocked or ignored). | |
547 | * Other ignored signals are discarded immediately. | |
687880f9 | 548 | */ |
8429d022 | 549 | void |
687880f9 BJ |
550 | psignal(p, sig) |
551 | register struct proc *p; | |
552 | register int sig; | |
553 | { | |
8429d022 | 554 | register int s, prop; |
f4af9a5b | 555 | register sig_t action; |
feff6b5a | 556 | int mask; |
687880f9 | 557 | |
f4af9a5b MK |
558 | if ((unsigned)sig >= NSIG || sig == 0) |
559 | panic("psignal sig"); | |
feff6b5a | 560 | mask = sigmask(sig); |
8429d022 | 561 | prop = sigprop[sig]; |
687880f9 BJ |
562 | |
563 | /* | |
564 | * If proc is traced, always give parent a chance. | |
687880f9 BJ |
565 | */ |
566 | if (p->p_flag & STRC) | |
567 | action = SIG_DFL; | |
568 | else { | |
687880f9 | 569 | /* |
dd012d1e SL |
570 | * If the signal is being ignored, |
571 | * then we forget about it immediately. | |
f4af9a5b MK |
572 | * (Note: we don't set SIGCONT in p_sigignore, |
573 | * and if it is set to SIG_IGN, | |
574 | * action will be SIG_DFL here.) | |
687880f9 | 575 | */ |
feff6b5a | 576 | if (p->p_sigignore & mask) |
687880f9 | 577 | return; |
feff6b5a | 578 | if (p->p_sigmask & mask) |
dd012d1e | 579 | action = SIG_HOLD; |
feff6b5a | 580 | else if (p->p_sigcatch & mask) |
dd012d1e | 581 | action = SIG_CATCH; |
e51c8e4a | 582 | else |
dd012d1e | 583 | action = SIG_DFL; |
687880f9 | 584 | } |
687880f9 | 585 | |
8429d022 MK |
586 | if (p->p_nice > NZERO && (sig == SIGKILL || |
587 | sig == SIGTERM && (p->p_flag&STRC || action != SIG_DFL))) | |
588 | p->p_nice = NZERO; | |
687880f9 | 589 | |
8429d022 | 590 | if (prop & SA_CONT) |
f4af9a5b | 591 | p->p_sig &= ~stopsigmask; |
f4af9a5b | 592 | |
8429d022 | 593 | if (prop & SA_STOP) { |
faf9c963 MK |
594 | /* |
595 | * If sending a tty stop signal to a member of an orphaned | |
596 | * process group, discard the signal here if the action | |
597 | * is default; don't stop the process below if sleeping, | |
598 | * and don't clear any pending SIGCONT. | |
599 | */ | |
8429d022 MK |
600 | if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0 && |
601 | action == SIG_DFL) | |
9db58063 | 602 | return; |
8429d022 | 603 | p->p_sig &= ~contsigmask; |
687880f9 | 604 | } |
f4af9a5b MK |
605 | p->p_sig |= mask; |
606 | ||
687880f9 | 607 | /* |
f4af9a5b MK |
608 | * Defer further processing for signals which are held, |
609 | * except that stopped processes must be continued by SIGCONT. | |
687880f9 | 610 | */ |
8429d022 | 611 | if (action == SIG_HOLD && ((prop & SA_CONT) == 0 || p->p_stat != SSTOP)) |
687880f9 | 612 | return; |
feff6b5a | 613 | s = splhigh(); |
687880f9 BJ |
614 | switch (p->p_stat) { |
615 | ||
616 | case SSLEEP: | |
617 | /* | |
22585170 | 618 | * If process is sleeping uninterruptibly |
687880f9 BJ |
619 | * we can't interrupt the sleep... the signal will |
620 | * be noticed when the process returns through | |
621 | * trap() or syscall(). | |
622 | */ | |
22585170 | 623 | if ((p->p_flag & SSINTR) == 0) |
687880f9 BJ |
624 | goto out; |
625 | /* | |
626 | * Process is sleeping and traced... make it runnable | |
627 | * so it can discover the signal in issig() and stop | |
628 | * for the parent. | |
629 | */ | |
630 | if (p->p_flag&STRC) | |
631 | goto run; | |
f4af9a5b MK |
632 | /* |
633 | * When a sleeping process receives a stop | |
634 | * signal, process immediately if possible. | |
635 | * All other (caught or default) signals | |
636 | * cause the process to run. | |
637 | */ | |
8429d022 | 638 | if (prop & SA_STOP) { |
687880f9 | 639 | if (action != SIG_DFL) |
f4af9a5b | 640 | goto runfast; |
687880f9 | 641 | /* |
8429d022 MK |
642 | * If a child holding parent blocked, |
643 | * stopping could cause deadlock. | |
687880f9 | 644 | */ |
8429d022 | 645 | if (p->p_flag&SPPWAIT) |
687880f9 | 646 | goto out; |
feff6b5a | 647 | p->p_sig &= ~mask; |
19dec745 | 648 | p->p_xstat = sig; |
f4af9a5b MK |
649 | if ((p->p_pptr->p_flag & SNOCLDSTOP) == 0) |
650 | psignal(p->p_pptr, SIGCHLD); | |
687880f9 BJ |
651 | stop(p); |
652 | goto out; | |
f4af9a5b MK |
653 | } else |
654 | goto runfast; | |
687880f9 BJ |
655 | /*NOTREACHED*/ |
656 | ||
657 | case SSTOP: | |
658 | /* | |
659 | * If traced process is already stopped, | |
660 | * then no further action is necessary. | |
661 | */ | |
662 | if (p->p_flag&STRC) | |
663 | goto out; | |
687880f9 | 664 | |
8429d022 MK |
665 | /* |
666 | * Kill signal always sets processes running. | |
667 | */ | |
668 | if (sig == SIGKILL) | |
f4af9a5b | 669 | goto runfast; |
687880f9 | 670 | |
8429d022 | 671 | if (prop & SA_CONT) { |
687880f9 | 672 | /* |
f4af9a5b MK |
673 | * If SIGCONT is default (or ignored), we continue |
674 | * the process but don't leave the signal in p_sig, | |
675 | * as it has no further action. If SIGCONT is held, | |
676 | * continue the process and leave the signal in p_sig. | |
687880f9 BJ |
677 | * If the process catches SIGCONT, let it handle |
678 | * the signal itself. If it isn't waiting on | |
679 | * an event, then it goes back to run state. | |
680 | * Otherwise, process goes back to sleep state. | |
681 | */ | |
f4af9a5b MK |
682 | if (action == SIG_DFL) |
683 | p->p_sig &= ~mask; | |
684 | if (action == SIG_CATCH) | |
685 | goto runfast; | |
686 | if (p->p_wchan == 0) | |
687880f9 BJ |
687 | goto run; |
688 | p->p_stat = SSLEEP; | |
689 | goto out; | |
8429d022 | 690 | } |
687880f9 | 691 | |
8429d022 | 692 | if (prop & SA_STOP) { |
687880f9 BJ |
693 | /* |
694 | * Already stopped, don't need to stop again. | |
695 | * (If we did the shell could get confused.) | |
696 | */ | |
feff6b5a | 697 | p->p_sig &= ~mask; /* take it away */ |
687880f9 | 698 | goto out; |
687880f9 | 699 | } |
8429d022 MK |
700 | |
701 | /* | |
702 | * If process is sleeping interruptibly, then | |
703 | * simulate a wakeup so that when it is continued, | |
704 | * it will be made runnable and can look at the signal. | |
705 | * But don't setrun the process, leave it stopped. | |
706 | */ | |
707 | if (p->p_wchan && p->p_flag & SSINTR) | |
708 | unsleep(p); | |
709 | goto out; | |
687880f9 BJ |
710 | |
711 | default: | |
712 | /* | |
713 | * SRUN, SIDL, SZOMB do nothing with the signal, | |
714 | * other than kicking ourselves if we are running. | |
715 | * It will either never be noticed, or noticed very soon. | |
716 | */ | |
8429d022 | 717 | if (p == curproc && !noproc) |
687880f9 BJ |
718 | aston(); |
719 | goto out; | |
720 | } | |
721 | /*NOTREACHED*/ | |
f4af9a5b MK |
722 | |
723 | runfast: | |
687880f9 BJ |
724 | /* |
725 | * Raise priority to at least PUSER. | |
726 | */ | |
727 | if (p->p_pri > PUSER) | |
e4f89871 | 728 | p->p_pri = PUSER; |
f4af9a5b | 729 | run: |
687880f9 BJ |
730 | setrun(p); |
731 | out: | |
732 | splx(s); | |
733 | } | |
734 | ||
735 | /* | |
22585170 MT |
736 | * If the current process has a signal to process (should be caught |
737 | * or cause termination, should interrupt current syscall), | |
738 | * return the signal number. Stop signals with default action | |
739 | * are processed immediately, then cleared; they aren't returned. | |
8429d022 MK |
740 | * This is checked after each entry to the system for a syscall |
741 | * or trap (though this can usually be done without actually calling | |
742 | * issig by checking the pending signal masks in the CURSIG macro.) | |
743 | * The normal call sequence is | |
744 | * | |
745 | * while (sig = CURSIG(curproc)) | |
746 | * psig(sig); | |
687880f9 | 747 | */ |
8429d022 MK |
748 | issig(p) |
749 | register struct proc *p; | |
687880f9 | 750 | { |
8429d022 | 751 | register int sig, mask, prop; |
687880f9 | 752 | |
687880f9 | 753 | for (;;) { |
f4af9a5b | 754 | mask = p->p_sig &~ p->p_sigmask; |
8429d022 | 755 | if (p->p_flag&SPPWAIT) |
f4af9a5b | 756 | mask &= ~stopsigmask; |
22585170 MT |
757 | if (mask == 0) /* no signal to send */ |
758 | return (0); | |
f4af9a5b | 759 | sig = ffs((long)mask); |
feff6b5a | 760 | mask = sigmask(sig); |
8429d022 | 761 | prop = sigprop[sig]; |
22585170 MT |
762 | /* |
763 | * We should see pending but ignored signals | |
764 | * only if STRC was on when they were posted. | |
765 | */ | |
766 | if (mask & p->p_sigignore && (p->p_flag&STRC) == 0) { | |
767 | p->p_sig &= ~mask; | |
768 | continue; | |
769 | } | |
8429d022 | 770 | if (p->p_flag&STRC && (p->p_flag&SPPWAIT) == 0) { |
687880f9 BJ |
771 | /* |
772 | * If traced, always stop, and stay | |
773 | * stopped until released by the parent. | |
774 | */ | |
19dec745 | 775 | p->p_xstat = sig; |
ad6c75cb | 776 | psignal(p->p_pptr, SIGCHLD); |
687880f9 BJ |
777 | do { |
778 | stop(p); | |
779 | swtch(); | |
1bfd8b20 | 780 | } while (!procxmt(p) && p->p_flag&STRC); |
687880f9 BJ |
781 | |
782 | /* | |
f99e4a3a | 783 | * If the traced bit got turned off, |
22585170 | 784 | * go back up to the top to rescan signals. |
f99e4a3a | 785 | * This ensures that p_sig* and u_signal are consistent. |
687880f9 | 786 | */ |
22585170 | 787 | if ((p->p_flag&STRC) == 0) |
687880f9 | 788 | continue; |
687880f9 BJ |
789 | |
790 | /* | |
791 | * If parent wants us to take the signal, | |
19dec745 | 792 | * then it will leave it in p->p_xstat; |
687880f9 BJ |
793 | * otherwise we just look for signals again. |
794 | */ | |
22585170 | 795 | p->p_sig &= ~mask; /* clear the old signal */ |
19dec745 | 796 | sig = p->p_xstat; |
687880f9 BJ |
797 | if (sig == 0) |
798 | continue; | |
f99e4a3a SL |
799 | |
800 | /* | |
22585170 MT |
801 | * Put the new signal into p_sig. |
802 | * If signal is being masked, | |
803 | * look for other signals. | |
f99e4a3a | 804 | */ |
feff6b5a | 805 | mask = sigmask(sig); |
22585170 MT |
806 | p->p_sig |= mask; |
807 | if (p->p_sigmask & mask) | |
f99e4a3a | 808 | continue; |
687880f9 | 809 | } |
22585170 MT |
810 | |
811 | /* | |
812 | * Decide whether the signal should be returned. | |
813 | * Return the signal's number, or fall through | |
814 | * to clear it from the pending mask. | |
815 | */ | |
8429d022 | 816 | switch ((int)p->p_sigacts->ps_sigact[sig]) { |
687880f9 BJ |
817 | |
818 | case SIG_DFL: | |
819 | /* | |
820 | * Don't take default actions on system processes. | |
821 | */ | |
8429d022 | 822 | if (p->p_pid <= 1) |
22585170 MT |
823 | break; /* == ignore */ |
824 | /* | |
825 | * If there is a pending stop signal to process | |
826 | * with default action, stop here, | |
e51c8e4a MK |
827 | * then clear the signal. However, |
828 | * if process is member of an orphaned | |
829 | * process group, ignore tty stop signals. | |
22585170 | 830 | */ |
8429d022 | 831 | if (prop & SA_STOP) { |
e51c8e4a MK |
832 | if (p->p_flag&STRC || |
833 | (p->p_pgrp->pg_jobc == 0 && | |
8429d022 | 834 | prop & SA_TTYSTOP)) |
22585170 | 835 | break; /* == ignore */ |
19dec745 | 836 | p->p_xstat = sig; |
687880f9 | 837 | stop(p); |
f4af9a5b MK |
838 | if ((p->p_pptr->p_flag & SNOCLDSTOP) == 0) |
839 | psignal(p->p_pptr, SIGCHLD); | |
687880f9 | 840 | swtch(); |
22585170 | 841 | break; |
8429d022 | 842 | } else if (prop & SA_IGNORE) { |
687880f9 | 843 | /* |
f4af9a5b MK |
844 | * Except for SIGCONT, shouldn't get here. |
845 | * Default action is to ignore; drop it. | |
687880f9 | 846 | */ |
22585170 | 847 | break; /* == ignore */ |
f4af9a5b | 848 | } else |
22585170 | 849 | return (sig); |
687880f9 BJ |
850 | /*NOTREACHED*/ |
851 | ||
687880f9 BJ |
852 | case SIG_IGN: |
853 | /* | |
f4af9a5b MK |
854 | * Masking above should prevent us ever trying |
855 | * to take action on an ignored signal other | |
856 | * than SIGCONT, unless process is traced. | |
687880f9 | 857 | */ |
8429d022 | 858 | if ((prop & SA_CONT) == 0 && (p->p_flag&STRC) == 0) |
687880f9 | 859 | printf("issig\n"); |
22585170 | 860 | break; /* == ignore */ |
687880f9 BJ |
861 | |
862 | default: | |
863 | /* | |
864 | * This signal has an action, let | |
865 | * psig process it. | |
866 | */ | |
22585170 | 867 | return (sig); |
687880f9 | 868 | } |
22585170 | 869 | p->p_sig &= ~mask; /* take the signal! */ |
687880f9 | 870 | } |
22585170 | 871 | /* NOTREACHED */ |
687880f9 BJ |
872 | } |
873 | ||
687880f9 BJ |
874 | /* |
875 | * Put the argument process into the stopped | |
ad6c75cb MK |
876 | * state and notify the parent via wakeup. |
877 | * Signals are handled elsewhere. | |
22585170 | 878 | * The process must not be on the run queue. |
687880f9 BJ |
879 | */ |
880 | stop(p) | |
881 | register struct proc *p; | |
882 | { | |
883 | ||
884 | p->p_stat = SSTOP; | |
885 | p->p_flag &= ~SWTED; | |
886 | wakeup((caddr_t)p->p_pptr); | |
687880f9 BJ |
887 | } |
888 | ||
889 | /* | |
8429d022 MK |
890 | * Take the action for the specified signal |
891 | * from the current set of pending signals. | |
687880f9 | 892 | */ |
8429d022 | 893 | void |
f9e4e2f4 WN |
894 | #if defined(i386) |
895 | psig(sig, flags) | |
896 | #else | |
22585170 | 897 | psig(sig) |
f9e4e2f4 | 898 | #endif |
22585170 | 899 | register int sig; |
687880f9 | 900 | { |
8429d022 MK |
901 | register struct proc *p = curproc; |
902 | register struct sigacts *ps = p->p_sigacts; | |
f4af9a5b | 903 | register sig_t action; |
8429d022 | 904 | int mask, returnmask; |
f4af9a5b | 905 | |
22585170 | 906 | #ifdef DIAGNOSTIC |
8429d022 MK |
907 | if (sig == 0) |
908 | panic("psig"); | |
22585170 | 909 | #endif |
8429d022 MK |
910 | mask = sigmask(sig); |
911 | p->p_sig &= ~mask; | |
912 | action = ps->ps_sigact[sig]; | |
22585170 | 913 | #ifdef KTRACE |
8429d022 MK |
914 | if (KTRPOINT(p, KTR_PSIG)) |
915 | ktrpsig(p->p_tracep, sig, action, ps->ps_flags & SA_OLDMASK ? | |
916 | ps->ps_oldmask : p->p_sigmask, 0); | |
22585170 | 917 | #endif |
8429d022 MK |
918 | if (action == SIG_DFL) { |
919 | /* | |
920 | * Default action, where the default is to kill | |
921 | * the process. (Other cases were ignored above.) | |
922 | * Mark the accounting record with the signal termination. | |
923 | * If dumping core, save the signal number for the debugger. | |
924 | */ | |
925 | p->p_acflag |= AXSIG; | |
926 | if (sigprop[sig] & SA_CORE) { | |
927 | ps->ps_sig = sig; | |
928 | if (coredump(p) == 0) | |
929 | sig |= WCOREFLAG; | |
930 | } | |
931 | exit(p, W_EXITCODE(0, sig)); | |
932 | /* NOTREACHED */ | |
933 | } else { | |
934 | /* | |
935 | * If we get here, the signal must be caught. | |
936 | */ | |
f4af9a5b | 937 | #ifdef DIAGNOSTIC |
8429d022 MK |
938 | if (action == SIG_IGN || (p->p_sigmask & mask)) |
939 | panic("psig action"); | |
f4af9a5b | 940 | #endif |
8429d022 MK |
941 | /* |
942 | * Set the new mask value and also defer further | |
943 | * occurences of this signal. | |
944 | * | |
945 | * Special case: user has done a sigpause. Here the | |
946 | * current mask is not of interest, but rather the | |
947 | * mask from before the sigpause is what we want | |
948 | * restored after the signal processing is completed. | |
949 | */ | |
950 | (void) splhigh(); | |
951 | if (ps->ps_flags & SA_OLDMASK) { | |
952 | returnmask = ps->ps_oldmask; | |
953 | ps->ps_flags &= ~SA_OLDMASK; | |
954 | } else | |
955 | returnmask = p->p_sigmask; | |
956 | p->p_sigmask |= ps->ps_catchmask[sig] | mask; | |
957 | (void) spl0(); | |
958 | p->p_stats->p_ru.ru_nsignals++; | |
f9e4e2f4 | 959 | #if defined(i386) |
8429d022 | 960 | sendsig(action, sig, returnmask, 0, flags); |
f9e4e2f4 | 961 | #else |
8429d022 | 962 | sendsig(action, sig, returnmask, 0); |
f9e4e2f4 | 963 | #endif |
8429d022 | 964 | } |
687880f9 BJ |
965 | } |
966 | ||
687880f9 | 967 | /* |
8429d022 MK |
968 | * Create a core dump. |
969 | * The file name should probably be "core.progname" | |
970 | * (or "mos.progname", or "dram.progname", or ...). | |
971 | * Core dumps aren't created if the process | |
687880f9 | 972 | */ |
8429d022 MK |
973 | coredump(p) |
974 | register struct proc *p; | |
687880f9 | 975 | { |
c4ec2128 | 976 | register struct vnode *vp; |
8429d022 MK |
977 | register struct pcred *pcred = p->p_cred; |
978 | register struct ucred *cred = pcred->pc_ucred; | |
979 | register struct vmspace *vm = p->p_vmspace; | |
d86a61ec KM |
980 | struct vattr vattr; |
981 | int error; | |
8429d022 | 982 | struct nameidata nd; |
687880f9 | 983 | |
8429d022 MK |
984 | if (pcred->p_svuid != pcred->p_ruid || |
985 | pcred->p_svgid != pcred->p_rgid) | |
d86a61ec | 986 | return (EFAULT); |
8429d022 MK |
987 | if (ctob(UPAGES + vm->vm_dsize + vm->vm_ssize) >= |
988 | p->p_rlimit[RLIMIT_CORE].rlim_cur) | |
d86a61ec | 989 | return (EFAULT); |
8429d022 MK |
990 | nd.ni_segflg = UIO_SYSSPACE; |
991 | nd.ni_dirp = "core"; | |
992 | if (error = vn_open(&nd, p, FCREAT|FWRITE, 0644)) | |
d86a61ec | 993 | return (error); |
8429d022 | 994 | vp = nd.ni_vp; |
4493085b | 995 | VOP_LOCK(vp); |
8429d022 | 996 | if (vp->v_type != VREG || VOP_GETATTR(vp, &vattr, cred) || |
d86a61ec | 997 | vattr.va_nlink != 1) { |
4493085b KM |
998 | vput(vp); |
999 | return (EFAULT); | |
7b0cb7cb | 1000 | } |
3ee1461b | 1001 | VATTR_NULL(&vattr); |
d86a61ec | 1002 | vattr.va_size = 0; |
8429d022 MK |
1003 | VOP_SETATTR(vp, &vattr, cred); |
1004 | p->p_acflag |= ACORE; | |
8f949d44 KM |
1005 | #ifdef HPUXCOMPAT |
1006 | /* | |
1007 | * BLETCH! If we loaded from an HPUX format binary file | |
1008 | * we have to dump an HPUX style user struct so that the | |
1009 | * HPUX debuggers can grok it. | |
1010 | */ | |
1011 | if (u.u_pcb.pcb_flags & PCB_HPUXBIN) | |
8429d022 | 1012 | error = hpuxdumpu(vp, cred); |
8f949d44 KM |
1013 | else |
1014 | #endif | |
d86a61ec | 1015 | error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&u, ctob(UPAGES), (off_t)0, |
8429d022 | 1016 | UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *)0); |
d86a61ec | 1017 | if (error == 0) |
8429d022 MK |
1018 | error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr, |
1019 | (int)ctob(vm->vm_dsize), (off_t)ctob(UPAGES), UIO_USERSPACE, | |
1020 | IO_NODELOCKED|IO_UNIT, cred, (int *)0); | |
d86a61ec KM |
1021 | if (error == 0) |
1022 | error = vn_rdwr(UIO_WRITE, vp, | |
8429d022 MK |
1023 | trunc_page(USRSTACK - ctob(vm->vm_ssize)), |
1024 | round_page(ctob(vm->vm_ssize)), | |
1025 | (off_t)ctob(UPAGES) + ctob(vm->vm_dsize), UIO_USERSPACE, | |
1026 | IO_NODELOCKED|IO_UNIT, cred, (int *)0); | |
4493085b | 1027 | vput(vp); |
d86a61ec | 1028 | return (error); |
687880f9 | 1029 | } |
f4af9a5b MK |
1030 | |
1031 | /* | |
1032 | * Nonexistent system call-- signal process (may want to handle it). | |
1033 | * Flag error in case process won't see signal immediately (blocked or ignored). | |
1034 | */ | |
8eea23a6 KM |
1035 | /* ARGSUSED */ |
1036 | nosys(p, args, retval) | |
1037 | struct proc *p; | |
1038 | void *args; | |
1039 | int *retval; | |
f4af9a5b MK |
1040 | { |
1041 | ||
8eea23a6 | 1042 | psignal(p, SIGSYS); |
d9c2f47f | 1043 | return (EINVAL); |
f4af9a5b | 1044 | } |