xref: /freebsd/sys/kern/kern_sig.c (revision 831d27a9f56da38cf007714c169d208e7b9739be)
1df8bae1dSRodney W. Grimes /*
2df8bae1dSRodney W. Grimes  * Copyright (c) 1982, 1986, 1989, 1991, 1993
3df8bae1dSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
4df8bae1dSRodney W. Grimes  * (c) UNIX System Laboratories, Inc.
5df8bae1dSRodney W. Grimes  * All or some portions of this file are derived from material licensed
6df8bae1dSRodney W. Grimes  * to the University of California by American Telephone and Telegraph
7df8bae1dSRodney W. Grimes  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8df8bae1dSRodney W. Grimes  * the permission of UNIX System Laboratories, Inc.
9df8bae1dSRodney W. Grimes  *
10df8bae1dSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
11df8bae1dSRodney W. Grimes  * modification, are permitted provided that the following conditions
12df8bae1dSRodney W. Grimes  * are met:
13df8bae1dSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
14df8bae1dSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
15df8bae1dSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
16df8bae1dSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
17df8bae1dSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
18df8bae1dSRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
19df8bae1dSRodney W. Grimes  *    must display the following acknowledgement:
20df8bae1dSRodney W. Grimes  *	This product includes software developed by the University of
21df8bae1dSRodney W. Grimes  *	California, Berkeley and its contributors.
22df8bae1dSRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
23df8bae1dSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
24df8bae1dSRodney W. Grimes  *    without specific prior written permission.
25df8bae1dSRodney W. Grimes  *
26df8bae1dSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27df8bae1dSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28df8bae1dSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29df8bae1dSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30df8bae1dSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31df8bae1dSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32df8bae1dSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33df8bae1dSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34df8bae1dSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35df8bae1dSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36df8bae1dSRodney W. Grimes  * SUCH DAMAGE.
37df8bae1dSRodney W. Grimes  *
38df8bae1dSRodney W. Grimes  *	@(#)kern_sig.c	8.7 (Berkeley) 4/18/94
39831d27a9SDon Lewis  * $Id: kern_sig.c,v 1.48 1998/10/21 16:31:38 jdp Exp $
40df8bae1dSRodney W. Grimes  */
41df8bae1dSRodney W. Grimes 
425591b823SEivind Eklund #include "opt_compat.h"
43db6a20e2SGarrett Wollman #include "opt_ktrace.h"
44db6a20e2SGarrett Wollman 
45df8bae1dSRodney W. Grimes #define	SIGPROP		/* include signal properties table */
46df8bae1dSRodney W. Grimes #include <sys/param.h>
47c87e2930SDavid Greenman #include <sys/kernel.h>
48d2d3e875SBruce Evans #include <sys/sysproto.h>
49df8bae1dSRodney W. Grimes #include <sys/signalvar.h>
50df8bae1dSRodney W. Grimes #include <sys/resourcevar.h>
51df8bae1dSRodney W. Grimes #include <sys/namei.h>
52df8bae1dSRodney W. Grimes #include <sys/vnode.h>
53df8bae1dSRodney W. Grimes #include <sys/proc.h>
542a024a2bSSean Eric Fagan #include <sys/pioctl.h>
55df8bae1dSRodney W. Grimes #include <sys/systm.h>
56df8bae1dSRodney W. Grimes #include <sys/acct.h>
573ac4d1efSBruce Evans #include <sys/fcntl.h>
58df8bae1dSRodney W. Grimes #include <sys/wait.h>
59df8bae1dSRodney W. Grimes #include <sys/ktrace.h>
60df8bae1dSRodney W. Grimes #include <sys/syslog.h>
61df8bae1dSRodney W. Grimes #include <sys/stat.h>
62d66a5066SPeter Wemm #include <sys/sysent.h>
63c87e2930SDavid Greenman #include <sys/sysctl.h>
64c5edb423SSean Eric Fagan #include <sys/malloc.h>
65df8bae1dSRodney W. Grimes 
66df8bae1dSRodney W. Grimes #include <machine/cpu.h>
673163861cSTor Egge #ifdef SMP
683163861cSTor Egge #include <machine/smp.h>
693163861cSTor Egge #endif
70df8bae1dSRodney W. Grimes 
7187b6de2bSPoul-Henning Kamp static int killpg1	__P((struct proc *cp, int signum, int pgid, int all));
728a2d9f50SBruce Evans static void setsigvec	__P((struct proc *p, int signum, struct sigaction *sa));
7387b6de2bSPoul-Henning Kamp static void stop	__P((struct proc *));
7426f9a767SRodney W. Grimes 
7557308494SJoerg Wunsch static int	kern_logsigexit = 1;
7657308494SJoerg Wunsch SYSCTL_INT(_kern, KERN_LOGSIGEXIT, logsigexit, CTLFLAG_RW, &kern_logsigexit, 0, "");
7757308494SJoerg Wunsch 
78df8bae1dSRodney W. Grimes /*
79df8bae1dSRodney W. Grimes  * Can process p, with pcred pc, send the signal signum to process q?
80df8bae1dSRodney W. Grimes  */
81df8bae1dSRodney W. Grimes #define CANSIGNAL(p, pc, q, signum) \
82df8bae1dSRodney W. Grimes 	((pc)->pc_ucred->cr_uid == 0 || \
83df8bae1dSRodney W. Grimes 	    (pc)->p_ruid == (q)->p_cred->p_ruid || \
84df8bae1dSRodney W. Grimes 	    (pc)->pc_ucred->cr_uid == (q)->p_cred->p_ruid || \
85df8bae1dSRodney W. Grimes 	    (pc)->p_ruid == (q)->p_ucred->cr_uid || \
86df8bae1dSRodney W. Grimes 	    (pc)->pc_ucred->cr_uid == (q)->p_ucred->cr_uid || \
87df8bae1dSRodney W. Grimes 	    ((signum) == SIGCONT && (q)->p_session == (p)->p_session))
88df8bae1dSRodney W. Grimes 
89831d27a9SDon Lewis /*
90831d27a9SDon Lewis  * Policy -- Can real uid ruid with ucred uc send a signal to process q?
91831d27a9SDon Lewis  */
92831d27a9SDon Lewis #define CANSIGIO(ruid, uc, q) \
93831d27a9SDon Lewis 	((uc)->cr_uid == 0 || \
94831d27a9SDon Lewis 	    (ruid) == (q)->p_cred->p_ruid || \
95831d27a9SDon Lewis 	    (uc)->cr_uid == (q)->p_cred->p_ruid || \
96831d27a9SDon Lewis 	    (ruid) == (q)->p_ucred->cr_uid || \
97831d27a9SDon Lewis 	    (uc)->cr_uid == (q)->p_ucred->cr_uid)
98831d27a9SDon Lewis 
9922d4b0fbSJohn Polstra int sugid_coredump;
100c87e2930SDavid Greenman SYSCTL_INT(_kern, OID_AUTO, sugid_coredump, CTLFLAG_RW, &sugid_coredump, 0, "");
101c87e2930SDavid Greenman 
102d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
103df8bae1dSRodney W. Grimes struct sigaction_args {
104df8bae1dSRodney W. Grimes 	int	signum;
105df8bae1dSRodney W. Grimes 	struct	sigaction *nsa;
106df8bae1dSRodney W. Grimes 	struct	sigaction *osa;
107df8bae1dSRodney W. Grimes };
108d2d3e875SBruce Evans #endif
109df8bae1dSRodney W. Grimes /* ARGSUSED */
11026f9a767SRodney W. Grimes int
111cb226aaaSPoul-Henning Kamp sigaction(p, uap)
112df8bae1dSRodney W. Grimes 	struct proc *p;
113df8bae1dSRodney W. Grimes 	register struct sigaction_args *uap;
114df8bae1dSRodney W. Grimes {
115df8bae1dSRodney W. Grimes 	struct sigaction vec;
116df8bae1dSRodney W. Grimes 	register struct sigaction *sa;
117df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
118df8bae1dSRodney W. Grimes 	register int signum;
119df8bae1dSRodney W. Grimes 	int bit, error;
120df8bae1dSRodney W. Grimes 
121df8bae1dSRodney W. Grimes 	signum = uap->signum;
122e6eeb36dSBruce Evans 	if (signum <= 0 || signum >= NSIG)
123df8bae1dSRodney W. Grimes 		return (EINVAL);
124df8bae1dSRodney W. Grimes 	sa = &vec;
125df8bae1dSRodney W. Grimes 	if (uap->osa) {
126df8bae1dSRodney W. Grimes 		sa->sa_handler = ps->ps_sigact[signum];
127df8bae1dSRodney W. Grimes 		sa->sa_mask = ps->ps_catchmask[signum];
128df8bae1dSRodney W. Grimes 		bit = sigmask(signum);
129df8bae1dSRodney W. Grimes 		sa->sa_flags = 0;
130df8bae1dSRodney W. Grimes 		if ((ps->ps_sigonstack & bit) != 0)
131df8bae1dSRodney W. Grimes 			sa->sa_flags |= SA_ONSTACK;
132df8bae1dSRodney W. Grimes 		if ((ps->ps_sigintr & bit) == 0)
133df8bae1dSRodney W. Grimes 			sa->sa_flags |= SA_RESTART;
134dedc04feSPeter Wemm 		if ((ps->ps_sigreset & bit) != 0)
135dedc04feSPeter Wemm 			sa->sa_flags |= SA_RESETHAND;
136289ccde0SPeter Wemm 		if ((ps->ps_signodefer & bit) != 0)
137dedc04feSPeter Wemm 			sa->sa_flags |= SA_NODEFER;
138289ccde0SPeter Wemm 		if (signum == SIGCHLD && p->p_flag & P_NOCLDSTOP)
139289ccde0SPeter Wemm 			sa->sa_flags |= SA_NOCLDSTOP;
140245f17d4SJoerg Wunsch 		if (signum == SIGCHLD && p->p_flag & P_NOCLDWAIT)
141245f17d4SJoerg Wunsch 			sa->sa_flags |= SA_NOCLDWAIT;
142bb56ec4aSPoul-Henning Kamp 		if ((error = copyout((caddr_t)sa, (caddr_t)uap->osa,
143bb56ec4aSPoul-Henning Kamp 		    sizeof (vec))))
144df8bae1dSRodney W. Grimes 			return (error);
145df8bae1dSRodney W. Grimes 	}
146df8bae1dSRodney W. Grimes 	if (uap->nsa) {
147bb56ec4aSPoul-Henning Kamp 		if ((error = copyin((caddr_t)uap->nsa, (caddr_t)sa,
148bb56ec4aSPoul-Henning Kamp 		    sizeof (vec))))
149df8bae1dSRodney W. Grimes 			return (error);
150e6eeb36dSBruce Evans 		if ((signum == SIGKILL || signum == SIGSTOP) &&
151e6eeb36dSBruce Evans 		    sa->sa_handler != SIG_DFL)
152e6eeb36dSBruce Evans 			return (EINVAL);
153df8bae1dSRodney W. Grimes 		setsigvec(p, signum, sa);
154df8bae1dSRodney W. Grimes 	}
155df8bae1dSRodney W. Grimes 	return (0);
156df8bae1dSRodney W. Grimes }
157df8bae1dSRodney W. Grimes 
1588a2d9f50SBruce Evans static void
159df8bae1dSRodney W. Grimes setsigvec(p, signum, sa)
160df8bae1dSRodney W. Grimes 	register struct proc *p;
161df8bae1dSRodney W. Grimes 	int signum;
162df8bae1dSRodney W. Grimes 	register struct sigaction *sa;
163df8bae1dSRodney W. Grimes {
164df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
165df8bae1dSRodney W. Grimes 	register int bit;
166df8bae1dSRodney W. Grimes 
167df8bae1dSRodney W. Grimes 	bit = sigmask(signum);
168df8bae1dSRodney W. Grimes 	/*
169df8bae1dSRodney W. Grimes 	 * Change setting atomically.
170df8bae1dSRodney W. Grimes 	 */
171df8bae1dSRodney W. Grimes 	(void) splhigh();
172df8bae1dSRodney W. Grimes 	ps->ps_sigact[signum] = sa->sa_handler;
173df8bae1dSRodney W. Grimes 	ps->ps_catchmask[signum] = sa->sa_mask &~ sigcantmask;
174df8bae1dSRodney W. Grimes 	if ((sa->sa_flags & SA_RESTART) == 0)
175df8bae1dSRodney W. Grimes 		ps->ps_sigintr |= bit;
176df8bae1dSRodney W. Grimes 	else
177df8bae1dSRodney W. Grimes 		ps->ps_sigintr &= ~bit;
178df8bae1dSRodney W. Grimes 	if (sa->sa_flags & SA_ONSTACK)
179df8bae1dSRodney W. Grimes 		ps->ps_sigonstack |= bit;
180df8bae1dSRodney W. Grimes 	else
181df8bae1dSRodney W. Grimes 		ps->ps_sigonstack &= ~bit;
182dedc04feSPeter Wemm 	if (sa->sa_flags & SA_RESETHAND)
183dedc04feSPeter Wemm 		ps->ps_sigreset |= bit;
1841e41c1b5SSteven Wallace 	else
185dedc04feSPeter Wemm 		ps->ps_sigreset &= ~bit;
186289ccde0SPeter Wemm 	if (sa->sa_flags & SA_NODEFER)
187289ccde0SPeter Wemm 		ps->ps_signodefer |= bit;
188289ccde0SPeter Wemm 	else
189289ccde0SPeter Wemm 		ps->ps_signodefer &= ~bit;
190df8bae1dSRodney W. Grimes #ifdef COMPAT_SUNOS
191df8bae1dSRodney W. Grimes 	if (sa->sa_flags & SA_USERTRAMP)
192df8bae1dSRodney W. Grimes 		ps->ps_usertramp |= bit;
193df8bae1dSRodney W. Grimes 	else
194df8bae1dSRodney W. Grimes 		ps->ps_usertramp &= ~bit;
195df8bae1dSRodney W. Grimes #endif
196df8bae1dSRodney W. Grimes 	if (signum == SIGCHLD) {
197df8bae1dSRodney W. Grimes 		if (sa->sa_flags & SA_NOCLDSTOP)
198df8bae1dSRodney W. Grimes 			p->p_flag |= P_NOCLDSTOP;
199df8bae1dSRodney W. Grimes 		else
200df8bae1dSRodney W. Grimes 			p->p_flag &= ~P_NOCLDSTOP;
201245f17d4SJoerg Wunsch 		if (sa->sa_flags & SA_NOCLDWAIT) {
202245f17d4SJoerg Wunsch 			/*
203245f17d4SJoerg Wunsch 			 * Paranoia: since SA_NOCLDWAIT is implemented by
204245f17d4SJoerg Wunsch 			 * reparenting the dying child to PID 1 (and
205245f17d4SJoerg Wunsch 			 * trust it to reap the zombie), PID 1 itself is
206245f17d4SJoerg Wunsch 			 * forbidden to set SA_NOCLDWAIT.
207245f17d4SJoerg Wunsch 			 */
208245f17d4SJoerg Wunsch 			if (p->p_pid == 1)
209245f17d4SJoerg Wunsch 				p->p_flag &= ~P_NOCLDWAIT;
210245f17d4SJoerg Wunsch 			else
211245f17d4SJoerg Wunsch 				p->p_flag |= P_NOCLDWAIT;
212245f17d4SJoerg Wunsch 		} else
213245f17d4SJoerg Wunsch 			p->p_flag &= ~P_NOCLDWAIT;
214df8bae1dSRodney W. Grimes 	}
215df8bae1dSRodney W. Grimes 	/*
216df8bae1dSRodney W. Grimes 	 * Set bit in p_sigignore for signals that are set to SIG_IGN,
217df8bae1dSRodney W. Grimes 	 * and for signals set to SIG_DFL where the default is to ignore.
218df8bae1dSRodney W. Grimes 	 * However, don't put SIGCONT in p_sigignore,
219df8bae1dSRodney W. Grimes 	 * as we have to restart the process.
220df8bae1dSRodney W. Grimes 	 */
221df8bae1dSRodney W. Grimes 	if (sa->sa_handler == SIG_IGN ||
222df8bae1dSRodney W. Grimes 	    (sigprop[signum] & SA_IGNORE && sa->sa_handler == SIG_DFL)) {
223df8bae1dSRodney W. Grimes 		p->p_siglist &= ~bit;		/* never to be seen again */
224df8bae1dSRodney W. Grimes 		if (signum != SIGCONT)
225df8bae1dSRodney W. Grimes 			p->p_sigignore |= bit;	/* easier in psignal */
226df8bae1dSRodney W. Grimes 		p->p_sigcatch &= ~bit;
227df8bae1dSRodney W. Grimes 	} else {
228df8bae1dSRodney W. Grimes 		p->p_sigignore &= ~bit;
229df8bae1dSRodney W. Grimes 		if (sa->sa_handler == SIG_DFL)
230df8bae1dSRodney W. Grimes 			p->p_sigcatch &= ~bit;
231df8bae1dSRodney W. Grimes 		else
232df8bae1dSRodney W. Grimes 			p->p_sigcatch |= bit;
233df8bae1dSRodney W. Grimes 	}
234df8bae1dSRodney W. Grimes 	(void) spl0();
235df8bae1dSRodney W. Grimes }
236df8bae1dSRodney W. Grimes 
237df8bae1dSRodney W. Grimes /*
238df8bae1dSRodney W. Grimes  * Initialize signal state for process 0;
239df8bae1dSRodney W. Grimes  * set to ignore signals that are ignored by default.
240df8bae1dSRodney W. Grimes  */
241df8bae1dSRodney W. Grimes void
242df8bae1dSRodney W. Grimes siginit(p)
243df8bae1dSRodney W. Grimes 	struct proc *p;
244df8bae1dSRodney W. Grimes {
245df8bae1dSRodney W. Grimes 	register int i;
246df8bae1dSRodney W. Grimes 
247df8bae1dSRodney W. Grimes 	for (i = 0; i < NSIG; i++)
248df8bae1dSRodney W. Grimes 		if (sigprop[i] & SA_IGNORE && i != SIGCONT)
249df8bae1dSRodney W. Grimes 			p->p_sigignore |= sigmask(i);
250df8bae1dSRodney W. Grimes }
251df8bae1dSRodney W. Grimes 
252df8bae1dSRodney W. Grimes /*
253df8bae1dSRodney W. Grimes  * Reset signals for an exec of the specified process.
254df8bae1dSRodney W. Grimes  */
255df8bae1dSRodney W. Grimes void
256df8bae1dSRodney W. Grimes execsigs(p)
257df8bae1dSRodney W. Grimes 	register struct proc *p;
258df8bae1dSRodney W. Grimes {
259df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
260df8bae1dSRodney W. Grimes 	register int nc, mask;
261df8bae1dSRodney W. Grimes 
262df8bae1dSRodney W. Grimes 	/*
263df8bae1dSRodney W. Grimes 	 * Reset caught signals.  Held signals remain held
264df8bae1dSRodney W. Grimes 	 * through p_sigmask (unless they were caught,
265df8bae1dSRodney W. Grimes 	 * and are now ignored by default).
266df8bae1dSRodney W. Grimes 	 */
267df8bae1dSRodney W. Grimes 	while (p->p_sigcatch) {
268df8bae1dSRodney W. Grimes 		nc = ffs((long)p->p_sigcatch);
269df8bae1dSRodney W. Grimes 		mask = sigmask(nc);
270df8bae1dSRodney W. Grimes 		p->p_sigcatch &= ~mask;
271df8bae1dSRodney W. Grimes 		if (sigprop[nc] & SA_IGNORE) {
272df8bae1dSRodney W. Grimes 			if (nc != SIGCONT)
273df8bae1dSRodney W. Grimes 				p->p_sigignore |= mask;
274df8bae1dSRodney W. Grimes 			p->p_siglist &= ~mask;
275df8bae1dSRodney W. Grimes 		}
276df8bae1dSRodney W. Grimes 		ps->ps_sigact[nc] = SIG_DFL;
277df8bae1dSRodney W. Grimes 	}
278df8bae1dSRodney W. Grimes 	/*
279df8bae1dSRodney W. Grimes 	 * Reset stack state to the user stack.
280df8bae1dSRodney W. Grimes 	 * Clear set of signals caught on the signal stack.
281df8bae1dSRodney W. Grimes 	 */
282d66a5066SPeter Wemm 	ps->ps_sigstk.ss_flags = SS_DISABLE;
283df8bae1dSRodney W. Grimes 	ps->ps_sigstk.ss_size = 0;
284aa98692fSAndreas Schulz 	ps->ps_sigstk.ss_sp = 0;
285df8bae1dSRodney W. Grimes 	ps->ps_flags = 0;
286df8bae1dSRodney W. Grimes }
287df8bae1dSRodney W. Grimes 
288df8bae1dSRodney W. Grimes /*
289df8bae1dSRodney W. Grimes  * Manipulate signal mask.
290df8bae1dSRodney W. Grimes  * Note that we receive new mask, not pointer,
291df8bae1dSRodney W. Grimes  * and return old mask as return value;
292df8bae1dSRodney W. Grimes  * the library stub does the rest.
293df8bae1dSRodney W. Grimes  */
294d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
295df8bae1dSRodney W. Grimes struct sigprocmask_args {
296df8bae1dSRodney W. Grimes 	int	how;
297df8bae1dSRodney W. Grimes 	sigset_t mask;
298df8bae1dSRodney W. Grimes };
299d2d3e875SBruce Evans #endif
30026f9a767SRodney W. Grimes int
301cb226aaaSPoul-Henning Kamp sigprocmask(p, uap)
302df8bae1dSRodney W. Grimes 	register struct proc *p;
303df8bae1dSRodney W. Grimes 	struct sigprocmask_args *uap;
304df8bae1dSRodney W. Grimes {
305df8bae1dSRodney W. Grimes 	int error = 0;
306df8bae1dSRodney W. Grimes 
307cb226aaaSPoul-Henning Kamp 	p->p_retval[0] = p->p_sigmask;
308df8bae1dSRodney W. Grimes 	(void) splhigh();
309df8bae1dSRodney W. Grimes 
310df8bae1dSRodney W. Grimes 	switch (uap->how) {
311df8bae1dSRodney W. Grimes 	case SIG_BLOCK:
312df8bae1dSRodney W. Grimes 		p->p_sigmask |= uap->mask &~ sigcantmask;
313df8bae1dSRodney W. Grimes 		break;
314df8bae1dSRodney W. Grimes 
315df8bae1dSRodney W. Grimes 	case SIG_UNBLOCK:
316df8bae1dSRodney W. Grimes 		p->p_sigmask &= ~uap->mask;
317df8bae1dSRodney W. Grimes 		break;
318df8bae1dSRodney W. Grimes 
319df8bae1dSRodney W. Grimes 	case SIG_SETMASK:
320df8bae1dSRodney W. Grimes 		p->p_sigmask = uap->mask &~ sigcantmask;
321df8bae1dSRodney W. Grimes 		break;
322df8bae1dSRodney W. Grimes 
323df8bae1dSRodney W. Grimes 	default:
324df8bae1dSRodney W. Grimes 		error = EINVAL;
325df8bae1dSRodney W. Grimes 		break;
326df8bae1dSRodney W. Grimes 	}
327df8bae1dSRodney W. Grimes 	(void) spl0();
328df8bae1dSRodney W. Grimes 	return (error);
329df8bae1dSRodney W. Grimes }
330df8bae1dSRodney W. Grimes 
331d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
332df8bae1dSRodney W. Grimes struct sigpending_args {
333df8bae1dSRodney W. Grimes 	int	dummy;
334df8bae1dSRodney W. Grimes };
335d2d3e875SBruce Evans #endif
336df8bae1dSRodney W. Grimes /* ARGSUSED */
33726f9a767SRodney W. Grimes int
338cb226aaaSPoul-Henning Kamp sigpending(p, uap)
339df8bae1dSRodney W. Grimes 	struct proc *p;
340df8bae1dSRodney W. Grimes 	struct sigpending_args *uap;
341df8bae1dSRodney W. Grimes {
342df8bae1dSRodney W. Grimes 
343cb226aaaSPoul-Henning Kamp 	p->p_retval[0] = p->p_siglist;
344df8bae1dSRodney W. Grimes 	return (0);
345df8bae1dSRodney W. Grimes }
346df8bae1dSRodney W. Grimes 
347df8bae1dSRodney W. Grimes #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
348df8bae1dSRodney W. Grimes /*
349df8bae1dSRodney W. Grimes  * Generalized interface signal handler, 4.3-compatible.
350df8bae1dSRodney W. Grimes  */
351d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
352df8bae1dSRodney W. Grimes struct osigvec_args {
353df8bae1dSRodney W. Grimes 	int	signum;
354df8bae1dSRodney W. Grimes 	struct	sigvec *nsv;
355df8bae1dSRodney W. Grimes 	struct	sigvec *osv;
356df8bae1dSRodney W. Grimes };
357d2d3e875SBruce Evans #endif
358df8bae1dSRodney W. Grimes /* ARGSUSED */
35926f9a767SRodney W. Grimes int
360cb226aaaSPoul-Henning Kamp osigvec(p, uap)
361df8bae1dSRodney W. Grimes 	struct proc *p;
362df8bae1dSRodney W. Grimes 	register struct osigvec_args *uap;
363df8bae1dSRodney W. Grimes {
364df8bae1dSRodney W. Grimes 	struct sigvec vec;
365df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
366df8bae1dSRodney W. Grimes 	register struct sigvec *sv;
367df8bae1dSRodney W. Grimes 	register int signum;
368df8bae1dSRodney W. Grimes 	int bit, error;
369df8bae1dSRodney W. Grimes 
370df8bae1dSRodney W. Grimes 	signum = uap->signum;
371e6eeb36dSBruce Evans 	if (signum <= 0 || signum >= NSIG)
372df8bae1dSRodney W. Grimes 		return (EINVAL);
373df8bae1dSRodney W. Grimes 	sv = &vec;
374df8bae1dSRodney W. Grimes 	if (uap->osv) {
375df8bae1dSRodney W. Grimes 		*(sig_t *)&sv->sv_handler = ps->ps_sigact[signum];
376df8bae1dSRodney W. Grimes 		sv->sv_mask = ps->ps_catchmask[signum];
377df8bae1dSRodney W. Grimes 		bit = sigmask(signum);
378df8bae1dSRodney W. Grimes 		sv->sv_flags = 0;
379df8bae1dSRodney W. Grimes 		if ((ps->ps_sigonstack & bit) != 0)
380df8bae1dSRodney W. Grimes 			sv->sv_flags |= SV_ONSTACK;
381df8bae1dSRodney W. Grimes 		if ((ps->ps_sigintr & bit) != 0)
382df8bae1dSRodney W. Grimes 			sv->sv_flags |= SV_INTERRUPT;
383289ccde0SPeter Wemm 		if ((ps->ps_sigreset & bit) != 0)
384289ccde0SPeter Wemm 			sv->sv_flags |= SV_RESETHAND;
385289ccde0SPeter Wemm 		if ((ps->ps_signodefer & bit) != 0)
386289ccde0SPeter Wemm 			sv->sv_flags |= SV_NODEFER;
387df8bae1dSRodney W. Grimes #ifndef COMPAT_SUNOS
388289ccde0SPeter Wemm 		if (signum == SIGCHLD && p->p_flag & P_NOCLDSTOP)
389289ccde0SPeter Wemm 			sv->sv_flags |= SV_NOCLDSTOP;
390df8bae1dSRodney W. Grimes #endif
391bb56ec4aSPoul-Henning Kamp 		if ((error = copyout((caddr_t)sv, (caddr_t)uap->osv,
392bb56ec4aSPoul-Henning Kamp 		    sizeof (vec))))
393df8bae1dSRodney W. Grimes 			return (error);
394df8bae1dSRodney W. Grimes 	}
395df8bae1dSRodney W. Grimes 	if (uap->nsv) {
396bb56ec4aSPoul-Henning Kamp 		if ((error = copyin((caddr_t)uap->nsv, (caddr_t)sv,
397bb56ec4aSPoul-Henning Kamp 		    sizeof (vec))))
398df8bae1dSRodney W. Grimes 			return (error);
399e6eeb36dSBruce Evans 		if ((signum == SIGKILL || signum == SIGSTOP) &&
400e6eeb36dSBruce Evans 		    sv->sv_handler != SIG_DFL)
401e6eeb36dSBruce Evans 			return (EINVAL);
402df8bae1dSRodney W. Grimes #ifdef COMPAT_SUNOS
403df8bae1dSRodney W. Grimes 		sv->sv_flags |= SA_USERTRAMP;
404df8bae1dSRodney W. Grimes #endif
405df8bae1dSRodney W. Grimes 		sv->sv_flags ^= SA_RESTART;	/* opposite of SV_INTERRUPT */
406df8bae1dSRodney W. Grimes 		setsigvec(p, signum, (struct sigaction *)sv);
407df8bae1dSRodney W. Grimes 	}
408df8bae1dSRodney W. Grimes 	return (0);
409df8bae1dSRodney W. Grimes }
410df8bae1dSRodney W. Grimes 
411d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
412df8bae1dSRodney W. Grimes struct osigblock_args {
413df8bae1dSRodney W. Grimes 	int	mask;
414df8bae1dSRodney W. Grimes };
415d2d3e875SBruce Evans #endif
41626f9a767SRodney W. Grimes int
417cb226aaaSPoul-Henning Kamp osigblock(p, uap)
418df8bae1dSRodney W. Grimes 	register struct proc *p;
419df8bae1dSRodney W. Grimes 	struct osigblock_args *uap;
420df8bae1dSRodney W. Grimes {
421df8bae1dSRodney W. Grimes 
422df8bae1dSRodney W. Grimes 	(void) splhigh();
423cb226aaaSPoul-Henning Kamp 	p->p_retval[0] = p->p_sigmask;
424df8bae1dSRodney W. Grimes 	p->p_sigmask |= uap->mask &~ sigcantmask;
425df8bae1dSRodney W. Grimes 	(void) spl0();
426df8bae1dSRodney W. Grimes 	return (0);
427df8bae1dSRodney W. Grimes }
428df8bae1dSRodney W. Grimes 
429d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
430df8bae1dSRodney W. Grimes struct osigsetmask_args {
431df8bae1dSRodney W. Grimes 	int	mask;
432df8bae1dSRodney W. Grimes };
433d2d3e875SBruce Evans #endif
43426f9a767SRodney W. Grimes int
435cb226aaaSPoul-Henning Kamp osigsetmask(p, uap)
436df8bae1dSRodney W. Grimes 	struct proc *p;
437df8bae1dSRodney W. Grimes 	struct osigsetmask_args *uap;
438df8bae1dSRodney W. Grimes {
439df8bae1dSRodney W. Grimes 
440df8bae1dSRodney W. Grimes 	(void) splhigh();
441cb226aaaSPoul-Henning Kamp 	p->p_retval[0] = p->p_sigmask;
442df8bae1dSRodney W. Grimes 	p->p_sigmask = uap->mask &~ sigcantmask;
443df8bae1dSRodney W. Grimes 	(void) spl0();
444df8bae1dSRodney W. Grimes 	return (0);
445df8bae1dSRodney W. Grimes }
446df8bae1dSRodney W. Grimes #endif /* COMPAT_43 || COMPAT_SUNOS */
447df8bae1dSRodney W. Grimes 
448df8bae1dSRodney W. Grimes /*
449df8bae1dSRodney W. Grimes  * Suspend process until signal, providing mask to be set
450df8bae1dSRodney W. Grimes  * in the meantime.  Note nonstandard calling convention:
451df8bae1dSRodney W. Grimes  * libc stub passes mask, not pointer, to save a copyin.
452df8bae1dSRodney W. Grimes  */
453d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
454df8bae1dSRodney W. Grimes struct sigsuspend_args {
455df8bae1dSRodney W. Grimes 	sigset_t mask;
456df8bae1dSRodney W. Grimes };
457d2d3e875SBruce Evans #endif
458df8bae1dSRodney W. Grimes /* ARGSUSED */
45926f9a767SRodney W. Grimes int
460cb226aaaSPoul-Henning Kamp sigsuspend(p, uap)
461df8bae1dSRodney W. Grimes 	register struct proc *p;
462df8bae1dSRodney W. Grimes 	struct sigsuspend_args *uap;
463df8bae1dSRodney W. Grimes {
464df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
465df8bae1dSRodney W. Grimes 
466df8bae1dSRodney W. Grimes 	/*
467df8bae1dSRodney W. Grimes 	 * When returning from sigpause, we want
468df8bae1dSRodney W. Grimes 	 * the old mask to be restored after the
469df8bae1dSRodney W. Grimes 	 * signal handler has finished.  Thus, we
470df8bae1dSRodney W. Grimes 	 * save it here and mark the sigacts structure
471df8bae1dSRodney W. Grimes 	 * to indicate this.
472df8bae1dSRodney W. Grimes 	 */
473df8bae1dSRodney W. Grimes 	ps->ps_oldmask = p->p_sigmask;
474df8bae1dSRodney W. Grimes 	ps->ps_flags |= SAS_OLDMASK;
475df8bae1dSRodney W. Grimes 	p->p_sigmask = uap->mask &~ sigcantmask;
476df8bae1dSRodney W. Grimes 	while (tsleep((caddr_t) ps, PPAUSE|PCATCH, "pause", 0) == 0)
477df8bae1dSRodney W. Grimes 		/* void */;
478df8bae1dSRodney W. Grimes 	/* always return EINTR rather than ERESTART... */
479df8bae1dSRodney W. Grimes 	return (EINTR);
480df8bae1dSRodney W. Grimes }
481df8bae1dSRodney W. Grimes 
482df8bae1dSRodney W. Grimes #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
483d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
484df8bae1dSRodney W. Grimes struct osigstack_args {
485df8bae1dSRodney W. Grimes 	struct	sigstack *nss;
486df8bae1dSRodney W. Grimes 	struct	sigstack *oss;
487df8bae1dSRodney W. Grimes };
488d2d3e875SBruce Evans #endif
489df8bae1dSRodney W. Grimes /* ARGSUSED */
49026f9a767SRodney W. Grimes int
491cb226aaaSPoul-Henning Kamp osigstack(p, uap)
492df8bae1dSRodney W. Grimes 	struct proc *p;
493df8bae1dSRodney W. Grimes 	register struct osigstack_args *uap;
494df8bae1dSRodney W. Grimes {
495df8bae1dSRodney W. Grimes 	struct sigstack ss;
496df8bae1dSRodney W. Grimes 	struct sigacts *psp;
497df8bae1dSRodney W. Grimes 	int error = 0;
498df8bae1dSRodney W. Grimes 
499df8bae1dSRodney W. Grimes 	psp = p->p_sigacts;
500aa98692fSAndreas Schulz 	ss.ss_sp = psp->ps_sigstk.ss_sp;
501d66a5066SPeter Wemm 	ss.ss_onstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
502df8bae1dSRodney W. Grimes 	if (uap->oss && (error = copyout((caddr_t)&ss, (caddr_t)uap->oss,
503df8bae1dSRodney W. Grimes 	    sizeof (struct sigstack))))
504df8bae1dSRodney W. Grimes 		return (error);
505df8bae1dSRodney W. Grimes 	if (uap->nss && (error = copyin((caddr_t)uap->nss, (caddr_t)&ss,
506df8bae1dSRodney W. Grimes 	    sizeof (ss))) == 0) {
507aa98692fSAndreas Schulz 		psp->ps_sigstk.ss_sp = ss.ss_sp;
508df8bae1dSRodney W. Grimes 		psp->ps_sigstk.ss_size = 0;
509d66a5066SPeter Wemm 		psp->ps_sigstk.ss_flags |= ss.ss_onstack & SS_ONSTACK;
510df8bae1dSRodney W. Grimes 		psp->ps_flags |= SAS_ALTSTACK;
511df8bae1dSRodney W. Grimes 	}
512df8bae1dSRodney W. Grimes 	return (error);
513df8bae1dSRodney W. Grimes }
514df8bae1dSRodney W. Grimes #endif /* COMPAT_43 || COMPAT_SUNOS */
515df8bae1dSRodney W. Grimes 
516d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
517df8bae1dSRodney W. Grimes struct sigaltstack_args {
518df8bae1dSRodney W. Grimes 	struct	sigaltstack *nss;
519df8bae1dSRodney W. Grimes 	struct	sigaltstack *oss;
520df8bae1dSRodney W. Grimes };
521d2d3e875SBruce Evans #endif
522df8bae1dSRodney W. Grimes /* ARGSUSED */
52326f9a767SRodney W. Grimes int
524cb226aaaSPoul-Henning Kamp sigaltstack(p, uap)
525df8bae1dSRodney W. Grimes 	struct proc *p;
526df8bae1dSRodney W. Grimes 	register struct sigaltstack_args *uap;
527df8bae1dSRodney W. Grimes {
528df8bae1dSRodney W. Grimes 	struct sigacts *psp;
529df8bae1dSRodney W. Grimes 	struct sigaltstack ss;
530df8bae1dSRodney W. Grimes 	int error;
531df8bae1dSRodney W. Grimes 
532df8bae1dSRodney W. Grimes 	psp = p->p_sigacts;
533df8bae1dSRodney W. Grimes 	if ((psp->ps_flags & SAS_ALTSTACK) == 0)
534d66a5066SPeter Wemm 		psp->ps_sigstk.ss_flags |= SS_DISABLE;
535df8bae1dSRodney W. Grimes 	if (uap->oss && (error = copyout((caddr_t)&psp->ps_sigstk,
536df8bae1dSRodney W. Grimes 	    (caddr_t)uap->oss, sizeof (struct sigaltstack))))
537df8bae1dSRodney W. Grimes 		return (error);
538df8bae1dSRodney W. Grimes 	if (uap->nss == 0)
539df8bae1dSRodney W. Grimes 		return (0);
540bb56ec4aSPoul-Henning Kamp 	if ((error = copyin((caddr_t)uap->nss, (caddr_t)&ss, sizeof (ss))))
541df8bae1dSRodney W. Grimes 		return (error);
542d66a5066SPeter Wemm 	if (ss.ss_flags & SS_DISABLE) {
543d66a5066SPeter Wemm 		if (psp->ps_sigstk.ss_flags & SS_ONSTACK)
544df8bae1dSRodney W. Grimes 			return (EINVAL);
545df8bae1dSRodney W. Grimes 		psp->ps_flags &= ~SAS_ALTSTACK;
546df8bae1dSRodney W. Grimes 		psp->ps_sigstk.ss_flags = ss.ss_flags;
547df8bae1dSRodney W. Grimes 		return (0);
548df8bae1dSRodney W. Grimes 	}
549df8bae1dSRodney W. Grimes 	if (ss.ss_size < MINSIGSTKSZ)
550df8bae1dSRodney W. Grimes 		return (ENOMEM);
551df8bae1dSRodney W. Grimes 	psp->ps_flags |= SAS_ALTSTACK;
552df8bae1dSRodney W. Grimes 	psp->ps_sigstk= ss;
553df8bae1dSRodney W. Grimes 	return (0);
554df8bae1dSRodney W. Grimes }
555df8bae1dSRodney W. Grimes 
556d93f860cSPoul-Henning Kamp /*
557d93f860cSPoul-Henning Kamp  * Common code for kill process group/broadcast kill.
558d93f860cSPoul-Henning Kamp  * cp is calling process.
559d93f860cSPoul-Henning Kamp  */
560d93f860cSPoul-Henning Kamp int
561d93f860cSPoul-Henning Kamp killpg1(cp, signum, pgid, all)
562d93f860cSPoul-Henning Kamp 	register struct proc *cp;
563d93f860cSPoul-Henning Kamp 	int signum, pgid, all;
564d93f860cSPoul-Henning Kamp {
565d93f860cSPoul-Henning Kamp 	register struct proc *p;
566d93f860cSPoul-Henning Kamp 	register struct pcred *pc = cp->p_cred;
567d93f860cSPoul-Henning Kamp 	struct pgrp *pgrp;
568d93f860cSPoul-Henning Kamp 	int nfound = 0;
569d93f860cSPoul-Henning Kamp 
570d93f860cSPoul-Henning Kamp 	if (all)
571d93f860cSPoul-Henning Kamp 		/*
572d93f860cSPoul-Henning Kamp 		 * broadcast
573d93f860cSPoul-Henning Kamp 		 */
574b75356e1SJeffrey Hsu 		for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
575d93f860cSPoul-Henning Kamp 			if (p->p_pid <= 1 || p->p_flag & P_SYSTEM ||
576d93f860cSPoul-Henning Kamp 			    p == cp || !CANSIGNAL(cp, pc, p, signum))
577d93f860cSPoul-Henning Kamp 				continue;
578d93f860cSPoul-Henning Kamp 			nfound++;
579d93f860cSPoul-Henning Kamp 			if (signum)
580d93f860cSPoul-Henning Kamp 				psignal(p, signum);
581d93f860cSPoul-Henning Kamp 		}
582d93f860cSPoul-Henning Kamp 	else {
583d93f860cSPoul-Henning Kamp 		if (pgid == 0)
584d93f860cSPoul-Henning Kamp 			/*
585d93f860cSPoul-Henning Kamp 			 * zero pgid means send to my process group.
586d93f860cSPoul-Henning Kamp 			 */
587d93f860cSPoul-Henning Kamp 			pgrp = cp->p_pgrp;
588d93f860cSPoul-Henning Kamp 		else {
589d93f860cSPoul-Henning Kamp 			pgrp = pgfind(pgid);
590d93f860cSPoul-Henning Kamp 			if (pgrp == NULL)
591d93f860cSPoul-Henning Kamp 				return (ESRCH);
592d93f860cSPoul-Henning Kamp 		}
593b75356e1SJeffrey Hsu 		for (p = pgrp->pg_members.lh_first; p != 0;
594b75356e1SJeffrey Hsu 		     p = p->p_pglist.le_next) {
595d93f860cSPoul-Henning Kamp 			if (p->p_pid <= 1 || p->p_flag & P_SYSTEM ||
596d93f860cSPoul-Henning Kamp 			    p->p_stat == SZOMB ||
597d93f860cSPoul-Henning Kamp 			    !CANSIGNAL(cp, pc, p, signum))
598d93f860cSPoul-Henning Kamp 				continue;
599d93f860cSPoul-Henning Kamp 			nfound++;
600d93f860cSPoul-Henning Kamp 			if (signum)
601d93f860cSPoul-Henning Kamp 				psignal(p, signum);
602d93f860cSPoul-Henning Kamp 		}
603d93f860cSPoul-Henning Kamp 	}
604d93f860cSPoul-Henning Kamp 	return (nfound ? 0 : ESRCH);
605d93f860cSPoul-Henning Kamp }
606d93f860cSPoul-Henning Kamp 
607d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
608df8bae1dSRodney W. Grimes struct kill_args {
609df8bae1dSRodney W. Grimes 	int	pid;
610df8bae1dSRodney W. Grimes 	int	signum;
611df8bae1dSRodney W. Grimes };
612d2d3e875SBruce Evans #endif
613df8bae1dSRodney W. Grimes /* ARGSUSED */
61426f9a767SRodney W. Grimes int
615cb226aaaSPoul-Henning Kamp kill(cp, uap)
616df8bae1dSRodney W. Grimes 	register struct proc *cp;
617df8bae1dSRodney W. Grimes 	register struct kill_args *uap;
618df8bae1dSRodney W. Grimes {
619df8bae1dSRodney W. Grimes 	register struct proc *p;
620df8bae1dSRodney W. Grimes 	register struct pcred *pc = cp->p_cred;
621df8bae1dSRodney W. Grimes 
622df8bae1dSRodney W. Grimes 	if ((u_int)uap->signum >= NSIG)
623df8bae1dSRodney W. Grimes 		return (EINVAL);
624df8bae1dSRodney W. Grimes 	if (uap->pid > 0) {
625df8bae1dSRodney W. Grimes 		/* kill single process */
626df8bae1dSRodney W. Grimes 		if ((p = pfind(uap->pid)) == NULL)
627df8bae1dSRodney W. Grimes 			return (ESRCH);
628df8bae1dSRodney W. Grimes 		if (!CANSIGNAL(cp, pc, p, uap->signum))
629df8bae1dSRodney W. Grimes 			return (EPERM);
630df8bae1dSRodney W. Grimes 		if (uap->signum)
631df8bae1dSRodney W. Grimes 			psignal(p, uap->signum);
632df8bae1dSRodney W. Grimes 		return (0);
633df8bae1dSRodney W. Grimes 	}
634df8bae1dSRodney W. Grimes 	switch (uap->pid) {
635df8bae1dSRodney W. Grimes 	case -1:		/* broadcast signal */
636df8bae1dSRodney W. Grimes 		return (killpg1(cp, uap->signum, 0, 1));
637df8bae1dSRodney W. Grimes 	case 0:			/* signal own process group */
638df8bae1dSRodney W. Grimes 		return (killpg1(cp, uap->signum, 0, 0));
639df8bae1dSRodney W. Grimes 	default:		/* negative explicit process group */
640df8bae1dSRodney W. Grimes 		return (killpg1(cp, uap->signum, -uap->pid, 0));
641df8bae1dSRodney W. Grimes 	}
642df8bae1dSRodney W. Grimes 	/* NOTREACHED */
643df8bae1dSRodney W. Grimes }
644df8bae1dSRodney W. Grimes 
645df8bae1dSRodney W. Grimes #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
646d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
647df8bae1dSRodney W. Grimes struct okillpg_args {
648df8bae1dSRodney W. Grimes 	int	pgid;
649df8bae1dSRodney W. Grimes 	int	signum;
650df8bae1dSRodney W. Grimes };
651d2d3e875SBruce Evans #endif
652df8bae1dSRodney W. Grimes /* ARGSUSED */
65326f9a767SRodney W. Grimes int
654cb226aaaSPoul-Henning Kamp okillpg(p, uap)
655df8bae1dSRodney W. Grimes 	struct proc *p;
656df8bae1dSRodney W. Grimes 	register struct okillpg_args *uap;
657df8bae1dSRodney W. Grimes {
658df8bae1dSRodney W. Grimes 
659df8bae1dSRodney W. Grimes 	if ((u_int)uap->signum >= NSIG)
660df8bae1dSRodney W. Grimes 		return (EINVAL);
661df8bae1dSRodney W. Grimes 	return (killpg1(p, uap->signum, uap->pgid, 0));
662df8bae1dSRodney W. Grimes }
663df8bae1dSRodney W. Grimes #endif /* COMPAT_43 || COMPAT_SUNOS */
664df8bae1dSRodney W. Grimes 
665df8bae1dSRodney W. Grimes /*
666df8bae1dSRodney W. Grimes  * Send a signal to a process group.
667df8bae1dSRodney W. Grimes  */
668df8bae1dSRodney W. Grimes void
669df8bae1dSRodney W. Grimes gsignal(pgid, signum)
670df8bae1dSRodney W. Grimes 	int pgid, signum;
671df8bae1dSRodney W. Grimes {
672df8bae1dSRodney W. Grimes 	struct pgrp *pgrp;
673df8bae1dSRodney W. Grimes 
674df8bae1dSRodney W. Grimes 	if (pgid && (pgrp = pgfind(pgid)))
675df8bae1dSRodney W. Grimes 		pgsignal(pgrp, signum, 0);
676df8bae1dSRodney W. Grimes }
677df8bae1dSRodney W. Grimes 
678df8bae1dSRodney W. Grimes /*
679df8bae1dSRodney W. Grimes  * Send a signal to a process group.  If checktty is 1,
680df8bae1dSRodney W. Grimes  * limit to members which have a controlling terminal.
681df8bae1dSRodney W. Grimes  */
682df8bae1dSRodney W. Grimes void
683df8bae1dSRodney W. Grimes pgsignal(pgrp, signum, checkctty)
684df8bae1dSRodney W. Grimes 	struct pgrp *pgrp;
685df8bae1dSRodney W. Grimes 	int signum, checkctty;
686df8bae1dSRodney W. Grimes {
687df8bae1dSRodney W. Grimes 	register struct proc *p;
688df8bae1dSRodney W. Grimes 
689df8bae1dSRodney W. Grimes 	if (pgrp)
690b75356e1SJeffrey Hsu 		for (p = pgrp->pg_members.lh_first; p != 0;
691b75356e1SJeffrey Hsu 		     p = p->p_pglist.le_next)
692df8bae1dSRodney W. Grimes 			if (checkctty == 0 || p->p_flag & P_CONTROLT)
693df8bae1dSRodney W. Grimes 				psignal(p, signum);
694df8bae1dSRodney W. Grimes }
695df8bae1dSRodney W. Grimes 
696df8bae1dSRodney W. Grimes /*
697df8bae1dSRodney W. Grimes  * Send a signal caused by a trap to the current process.
698df8bae1dSRodney W. Grimes  * If it will be caught immediately, deliver it with correct code.
699df8bae1dSRodney W. Grimes  * Otherwise, post it normally.
700df8bae1dSRodney W. Grimes  */
701df8bae1dSRodney W. Grimes void
702df8bae1dSRodney W. Grimes trapsignal(p, signum, code)
703df8bae1dSRodney W. Grimes 	struct proc *p;
704df8bae1dSRodney W. Grimes 	register int signum;
7058674077aSJeffrey Hsu 	u_long code;
706df8bae1dSRodney W. Grimes {
707df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
708df8bae1dSRodney W. Grimes 	int mask;
709df8bae1dSRodney W. Grimes 
710df8bae1dSRodney W. Grimes 	mask = sigmask(signum);
711df8bae1dSRodney W. Grimes 	if ((p->p_flag & P_TRACED) == 0 && (p->p_sigcatch & mask) != 0 &&
712df8bae1dSRodney W. Grimes 	    (p->p_sigmask & mask) == 0) {
713df8bae1dSRodney W. Grimes 		p->p_stats->p_ru.ru_nsignals++;
714df8bae1dSRodney W. Grimes #ifdef KTRACE
715df8bae1dSRodney W. Grimes 		if (KTRPOINT(p, KTR_PSIG))
716df8bae1dSRodney W. Grimes 			ktrpsig(p->p_tracep, signum, ps->ps_sigact[signum],
717df8bae1dSRodney W. Grimes 				p->p_sigmask, code);
718df8bae1dSRodney W. Grimes #endif
719d66a5066SPeter Wemm 		(*p->p_sysent->sv_sendsig)(ps->ps_sigact[signum], signum,
720d66a5066SPeter Wemm 						p->p_sigmask, code);
721289ccde0SPeter Wemm 		p->p_sigmask |= ps->ps_catchmask[signum] |
722289ccde0SPeter Wemm 				(mask & ~ps->ps_signodefer);
723dedc04feSPeter Wemm 		if ((ps->ps_sigreset & mask) != 0) {
724289ccde0SPeter Wemm 			/*
725289ccde0SPeter Wemm 			 * See setsigvec() for origin of this code.
726289ccde0SPeter Wemm 			 */
727dedc04feSPeter Wemm 			p->p_sigcatch &= ~mask;
728dedc04feSPeter Wemm 			if (signum != SIGCONT && sigprop[signum] & SA_IGNORE)
729dedc04feSPeter Wemm 				p->p_sigignore |= mask;
730dedc04feSPeter Wemm 			ps->ps_sigact[signum] = SIG_DFL;
731dedc04feSPeter Wemm 		}
732df8bae1dSRodney W. Grimes 	} else {
733df8bae1dSRodney W. Grimes 		ps->ps_code = code;	/* XXX for core dump/debugger */
7348674077aSJeffrey Hsu 		ps->ps_sig = signum;	/* XXX to verify code */
735df8bae1dSRodney W. Grimes 		psignal(p, signum);
736df8bae1dSRodney W. Grimes 	}
737df8bae1dSRodney W. Grimes }
738df8bae1dSRodney W. Grimes 
739df8bae1dSRodney W. Grimes /*
740df8bae1dSRodney W. Grimes  * Send the signal to the process.  If the signal has an action, the action
741df8bae1dSRodney W. Grimes  * is usually performed by the target process rather than the caller; we add
742df8bae1dSRodney W. Grimes  * the signal to the set of pending signals for the process.
743df8bae1dSRodney W. Grimes  *
744df8bae1dSRodney W. Grimes  * Exceptions:
745df8bae1dSRodney W. Grimes  *   o When a stop signal is sent to a sleeping process that takes the
746df8bae1dSRodney W. Grimes  *     default action, the process is stopped without awakening it.
747df8bae1dSRodney W. Grimes  *   o SIGCONT restarts stopped processes (or puts them back to sleep)
748df8bae1dSRodney W. Grimes  *     regardless of the signal action (eg, blocked or ignored).
749df8bae1dSRodney W. Grimes  *
750df8bae1dSRodney W. Grimes  * Other ignored signals are discarded immediately.
751df8bae1dSRodney W. Grimes  */
752df8bae1dSRodney W. Grimes void
753df8bae1dSRodney W. Grimes psignal(p, signum)
754df8bae1dSRodney W. Grimes 	register struct proc *p;
755df8bae1dSRodney W. Grimes 	register int signum;
756df8bae1dSRodney W. Grimes {
757df8bae1dSRodney W. Grimes 	register int s, prop;
758df8bae1dSRodney W. Grimes 	register sig_t action;
759df8bae1dSRodney W. Grimes 	int mask;
760df8bae1dSRodney W. Grimes 
7612a024a2bSSean Eric Fagan 	if ((u_int)signum >= NSIG || signum == 0) {
7622a024a2bSSean Eric Fagan 		printf("psignal: signum %d\n", signum);
763df8bae1dSRodney W. Grimes 		panic("psignal signal number");
7642a024a2bSSean Eric Fagan 	}
765df8bae1dSRodney W. Grimes 	mask = sigmask(signum);
766df8bae1dSRodney W. Grimes 	prop = sigprop[signum];
767df8bae1dSRodney W. Grimes 
768df8bae1dSRodney W. Grimes 	/*
7692a024a2bSSean Eric Fagan 	 * If proc is traced, always give parent a chance;
7702a024a2bSSean Eric Fagan 	 * if signal event is tracked by procfs, give *that*
7712a024a2bSSean Eric Fagan 	 * a chance, as well.
772df8bae1dSRodney W. Grimes 	 */
7732a024a2bSSean Eric Fagan 	if ((p->p_flag & P_TRACED) || (p->p_stops & S_SIG))
774df8bae1dSRodney W. Grimes 		action = SIG_DFL;
775df8bae1dSRodney W. Grimes 	else {
776df8bae1dSRodney W. Grimes 		/*
777df8bae1dSRodney W. Grimes 		 * If the signal is being ignored,
778df8bae1dSRodney W. Grimes 		 * then we forget about it immediately.
779df8bae1dSRodney W. Grimes 		 * (Note: we don't set SIGCONT in p_sigignore,
780df8bae1dSRodney W. Grimes 		 * and if it is set to SIG_IGN,
781df8bae1dSRodney W. Grimes 		 * action will be SIG_DFL here.)
782df8bae1dSRodney W. Grimes 		 */
783df8bae1dSRodney W. Grimes 		if (p->p_sigignore & mask)
784df8bae1dSRodney W. Grimes 			return;
785df8bae1dSRodney W. Grimes 		if (p->p_sigmask & mask)
786df8bae1dSRodney W. Grimes 			action = SIG_HOLD;
787df8bae1dSRodney W. Grimes 		else if (p->p_sigcatch & mask)
788df8bae1dSRodney W. Grimes 			action = SIG_CATCH;
789df8bae1dSRodney W. Grimes 		else
790df8bae1dSRodney W. Grimes 			action = SIG_DFL;
791df8bae1dSRodney W. Grimes 	}
792df8bae1dSRodney W. Grimes 
793df8bae1dSRodney W. Grimes 	if (p->p_nice > NZERO && action == SIG_DFL && (prop & SA_KILL) &&
794df8bae1dSRodney W. Grimes 	    (p->p_flag & P_TRACED) == 0)
795df8bae1dSRodney W. Grimes 		p->p_nice = NZERO;
796df8bae1dSRodney W. Grimes 
797df8bae1dSRodney W. Grimes 	if (prop & SA_CONT)
798df8bae1dSRodney W. Grimes 		p->p_siglist &= ~stopsigmask;
799df8bae1dSRodney W. Grimes 
800df8bae1dSRodney W. Grimes 	if (prop & SA_STOP) {
801df8bae1dSRodney W. Grimes 		/*
802df8bae1dSRodney W. Grimes 		 * If sending a tty stop signal to a member of an orphaned
803df8bae1dSRodney W. Grimes 		 * process group, discard the signal here if the action
804df8bae1dSRodney W. Grimes 		 * is default; don't stop the process below if sleeping,
805df8bae1dSRodney W. Grimes 		 * and don't clear any pending SIGCONT.
806df8bae1dSRodney W. Grimes 		 */
807df8bae1dSRodney W. Grimes 		if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0 &&
808df8bae1dSRodney W. Grimes 		    action == SIG_DFL)
809df8bae1dSRodney W. Grimes 		        return;
810df8bae1dSRodney W. Grimes 		p->p_siglist &= ~contsigmask;
811df8bae1dSRodney W. Grimes 	}
812df8bae1dSRodney W. Grimes 	p->p_siglist |= mask;
813df8bae1dSRodney W. Grimes 
814df8bae1dSRodney W. Grimes 	/*
815df8bae1dSRodney W. Grimes 	 * Defer further processing for signals which are held,
816df8bae1dSRodney W. Grimes 	 * except that stopped processes must be continued by SIGCONT.
817df8bae1dSRodney W. Grimes 	 */
818df8bae1dSRodney W. Grimes 	if (action == SIG_HOLD && ((prop & SA_CONT) == 0 || p->p_stat != SSTOP))
819df8bae1dSRodney W. Grimes 		return;
820df8bae1dSRodney W. Grimes 	s = splhigh();
821df8bae1dSRodney W. Grimes 	switch (p->p_stat) {
822df8bae1dSRodney W. Grimes 
823df8bae1dSRodney W. Grimes 	case SSLEEP:
824df8bae1dSRodney W. Grimes 		/*
825df8bae1dSRodney W. Grimes 		 * If process is sleeping uninterruptibly
826df8bae1dSRodney W. Grimes 		 * we can't interrupt the sleep... the signal will
827df8bae1dSRodney W. Grimes 		 * be noticed when the process returns through
828df8bae1dSRodney W. Grimes 		 * trap() or syscall().
829df8bae1dSRodney W. Grimes 		 */
830df8bae1dSRodney W. Grimes 		if ((p->p_flag & P_SINTR) == 0)
831df8bae1dSRodney W. Grimes 			goto out;
832df8bae1dSRodney W. Grimes 		/*
833df8bae1dSRodney W. Grimes 		 * Process is sleeping and traced... make it runnable
834df8bae1dSRodney W. Grimes 		 * so it can discover the signal in issignal() and stop
835df8bae1dSRodney W. Grimes 		 * for the parent.
836df8bae1dSRodney W. Grimes 		 */
837df8bae1dSRodney W. Grimes 		if (p->p_flag & P_TRACED)
838df8bae1dSRodney W. Grimes 			goto run;
839df8bae1dSRodney W. Grimes 		/*
840df8bae1dSRodney W. Grimes 		 * If SIGCONT is default (or ignored) and process is
841df8bae1dSRodney W. Grimes 		 * asleep, we are finished; the process should not
842df8bae1dSRodney W. Grimes 		 * be awakened.
843df8bae1dSRodney W. Grimes 		 */
844df8bae1dSRodney W. Grimes 		if ((prop & SA_CONT) && action == SIG_DFL) {
845df8bae1dSRodney W. Grimes 			p->p_siglist &= ~mask;
846df8bae1dSRodney W. Grimes 			goto out;
847df8bae1dSRodney W. Grimes 		}
848df8bae1dSRodney W. Grimes 		/*
849df8bae1dSRodney W. Grimes 		 * When a sleeping process receives a stop
850df8bae1dSRodney W. Grimes 		 * signal, process immediately if possible.
851df8bae1dSRodney W. Grimes 		 * All other (caught or default) signals
852df8bae1dSRodney W. Grimes 		 * cause the process to run.
853df8bae1dSRodney W. Grimes 		 */
854df8bae1dSRodney W. Grimes 		if (prop & SA_STOP) {
855df8bae1dSRodney W. Grimes 			if (action != SIG_DFL)
856df8bae1dSRodney W. Grimes 				goto runfast;
857df8bae1dSRodney W. Grimes 			/*
858df8bae1dSRodney W. Grimes 			 * If a child holding parent blocked,
859df8bae1dSRodney W. Grimes 			 * stopping could cause deadlock.
860df8bae1dSRodney W. Grimes 			 */
861df8bae1dSRodney W. Grimes 			if (p->p_flag & P_PPWAIT)
862df8bae1dSRodney W. Grimes 				goto out;
863df8bae1dSRodney W. Grimes 			p->p_siglist &= ~mask;
864df8bae1dSRodney W. Grimes 			p->p_xstat = signum;
865df8bae1dSRodney W. Grimes 			if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0)
866df8bae1dSRodney W. Grimes 				psignal(p->p_pptr, SIGCHLD);
867df8bae1dSRodney W. Grimes 			stop(p);
868df8bae1dSRodney W. Grimes 			goto out;
869df8bae1dSRodney W. Grimes 		} else
870df8bae1dSRodney W. Grimes 			goto runfast;
871df8bae1dSRodney W. Grimes 		/*NOTREACHED*/
872df8bae1dSRodney W. Grimes 
873df8bae1dSRodney W. Grimes 	case SSTOP:
874df8bae1dSRodney W. Grimes 		/*
875df8bae1dSRodney W. Grimes 		 * If traced process is already stopped,
876df8bae1dSRodney W. Grimes 		 * then no further action is necessary.
877df8bae1dSRodney W. Grimes 		 */
878df8bae1dSRodney W. Grimes 		if (p->p_flag & P_TRACED)
879df8bae1dSRodney W. Grimes 			goto out;
880df8bae1dSRodney W. Grimes 
881df8bae1dSRodney W. Grimes 		/*
882df8bae1dSRodney W. Grimes 		 * Kill signal always sets processes running.
883df8bae1dSRodney W. Grimes 		 */
884df8bae1dSRodney W. Grimes 		if (signum == SIGKILL)
885df8bae1dSRodney W. Grimes 			goto runfast;
886df8bae1dSRodney W. Grimes 
887df8bae1dSRodney W. Grimes 		if (prop & SA_CONT) {
888df8bae1dSRodney W. Grimes 			/*
889df8bae1dSRodney W. Grimes 			 * If SIGCONT is default (or ignored), we continue the
890df8bae1dSRodney W. Grimes 			 * process but don't leave the signal in p_siglist, as
891df8bae1dSRodney W. Grimes 			 * it has no further action.  If SIGCONT is held, we
892df8bae1dSRodney W. Grimes 			 * continue the process and leave the signal in
893df8bae1dSRodney W. Grimes 			 * p_siglist.  If the process catches SIGCONT, let it
894df8bae1dSRodney W. Grimes 			 * handle the signal itself.  If it isn't waiting on
895df8bae1dSRodney W. Grimes 			 * an event, then it goes back to run state.
896df8bae1dSRodney W. Grimes 			 * Otherwise, process goes back to sleep state.
897df8bae1dSRodney W. Grimes 			 */
898df8bae1dSRodney W. Grimes 			if (action == SIG_DFL)
899df8bae1dSRodney W. Grimes 				p->p_siglist &= ~mask;
900df8bae1dSRodney W. Grimes 			if (action == SIG_CATCH)
901df8bae1dSRodney W. Grimes 				goto runfast;
902df8bae1dSRodney W. Grimes 			if (p->p_wchan == 0)
903df8bae1dSRodney W. Grimes 				goto run;
904df8bae1dSRodney W. Grimes 			p->p_stat = SSLEEP;
905df8bae1dSRodney W. Grimes 			goto out;
906df8bae1dSRodney W. Grimes 		}
907df8bae1dSRodney W. Grimes 
908df8bae1dSRodney W. Grimes 		if (prop & SA_STOP) {
909df8bae1dSRodney W. Grimes 			/*
910df8bae1dSRodney W. Grimes 			 * Already stopped, don't need to stop again.
911df8bae1dSRodney W. Grimes 			 * (If we did the shell could get confused.)
912df8bae1dSRodney W. Grimes 			 */
913df8bae1dSRodney W. Grimes 			p->p_siglist &= ~mask;		/* take it away */
914df8bae1dSRodney W. Grimes 			goto out;
915df8bae1dSRodney W. Grimes 		}
916df8bae1dSRodney W. Grimes 
917df8bae1dSRodney W. Grimes 		/*
918df8bae1dSRodney W. Grimes 		 * If process is sleeping interruptibly, then simulate a
919df8bae1dSRodney W. Grimes 		 * wakeup so that when it is continued, it will be made
920df8bae1dSRodney W. Grimes 		 * runnable and can look at the signal.  But don't make
921df8bae1dSRodney W. Grimes 		 * the process runnable, leave it stopped.
922df8bae1dSRodney W. Grimes 		 */
923df8bae1dSRodney W. Grimes 		if (p->p_wchan && p->p_flag & P_SINTR)
924df8bae1dSRodney W. Grimes 			unsleep(p);
925df8bae1dSRodney W. Grimes 		goto out;
926df8bae1dSRodney W. Grimes 
927df8bae1dSRodney W. Grimes 	default:
928df8bae1dSRodney W. Grimes 		/*
929df8bae1dSRodney W. Grimes 		 * SRUN, SIDL, SZOMB do nothing with the signal,
930df8bae1dSRodney W. Grimes 		 * other than kicking ourselves if we are running.
931df8bae1dSRodney W. Grimes 		 * It will either never be noticed, or noticed very soon.
932df8bae1dSRodney W. Grimes 		 */
933df8bae1dSRodney W. Grimes 		if (p == curproc)
934df8bae1dSRodney W. Grimes 			signotify(p);
9353163861cSTor Egge #ifdef SMP
9363163861cSTor Egge 		else if (p->p_stat == SRUN)
9373163861cSTor Egge 			forward_signal(p);
9383163861cSTor Egge #endif
939df8bae1dSRodney W. Grimes 		goto out;
940df8bae1dSRodney W. Grimes 	}
941df8bae1dSRodney W. Grimes 	/*NOTREACHED*/
942df8bae1dSRodney W. Grimes 
943df8bae1dSRodney W. Grimes runfast:
944df8bae1dSRodney W. Grimes 	/*
945df8bae1dSRodney W. Grimes 	 * Raise priority to at least PUSER.
946df8bae1dSRodney W. Grimes 	 */
947df8bae1dSRodney W. Grimes 	if (p->p_priority > PUSER)
948df8bae1dSRodney W. Grimes 		p->p_priority = PUSER;
949df8bae1dSRodney W. Grimes run:
950df8bae1dSRodney W. Grimes 	setrunnable(p);
951df8bae1dSRodney W. Grimes out:
952df8bae1dSRodney W. Grimes 	splx(s);
953df8bae1dSRodney W. Grimes }
954df8bae1dSRodney W. Grimes 
955df8bae1dSRodney W. Grimes /*
956df8bae1dSRodney W. Grimes  * If the current process has received a signal (should be caught or cause
957df8bae1dSRodney W. Grimes  * termination, should interrupt current syscall), return the signal number.
958df8bae1dSRodney W. Grimes  * Stop signals with default action are processed immediately, then cleared;
959df8bae1dSRodney W. Grimes  * they aren't returned.  This is checked after each entry to the system for
960df8bae1dSRodney W. Grimes  * a syscall or trap (though this can usually be done without calling issignal
961df8bae1dSRodney W. Grimes  * by checking the pending signal masks in the CURSIG macro.) The normal call
962df8bae1dSRodney W. Grimes  * sequence is
963df8bae1dSRodney W. Grimes  *
964df8bae1dSRodney W. Grimes  *	while (signum = CURSIG(curproc))
965df8bae1dSRodney W. Grimes  *		postsig(signum);
966df8bae1dSRodney W. Grimes  */
96726f9a767SRodney W. Grimes int
968df8bae1dSRodney W. Grimes issignal(p)
969df8bae1dSRodney W. Grimes 	register struct proc *p;
970df8bae1dSRodney W. Grimes {
971df8bae1dSRodney W. Grimes 	register int signum, mask, prop;
972df8bae1dSRodney W. Grimes 
973df8bae1dSRodney W. Grimes 	for (;;) {
9742a024a2bSSean Eric Fagan 		int traced = (p->p_flag & P_TRACED) || (p->p_stops & S_SIG);
9752a024a2bSSean Eric Fagan 
976df8bae1dSRodney W. Grimes 		mask = p->p_siglist & ~p->p_sigmask;
977df8bae1dSRodney W. Grimes 		if (p->p_flag & P_PPWAIT)
978df8bae1dSRodney W. Grimes 			mask &= ~stopsigmask;
979df8bae1dSRodney W. Grimes 		if (mask == 0)	 	/* no signal to send */
980df8bae1dSRodney W. Grimes 			return (0);
981df8bae1dSRodney W. Grimes 		signum = ffs((long)mask);
982df8bae1dSRodney W. Grimes 		mask = sigmask(signum);
983df8bae1dSRodney W. Grimes 		prop = sigprop[signum];
9842a024a2bSSean Eric Fagan 
9852a024a2bSSean Eric Fagan 		STOPEVENT(p, S_SIG, signum);
9862a024a2bSSean Eric Fagan 
987df8bae1dSRodney W. Grimes 		/*
988df8bae1dSRodney W. Grimes 		 * We should see pending but ignored signals
989df8bae1dSRodney W. Grimes 		 * only if P_TRACED was on when they were posted.
990df8bae1dSRodney W. Grimes 		 */
9912a024a2bSSean Eric Fagan 		if ((mask & p->p_sigignore) && (traced == 0)) {
992df8bae1dSRodney W. Grimes 			p->p_siglist &= ~mask;
993df8bae1dSRodney W. Grimes 			continue;
994df8bae1dSRodney W. Grimes 		}
995df8bae1dSRodney W. Grimes 		if (p->p_flag & P_TRACED && (p->p_flag & P_PPWAIT) == 0) {
996df8bae1dSRodney W. Grimes 			/*
997df8bae1dSRodney W. Grimes 			 * If traced, always stop, and stay
998df8bae1dSRodney W. Grimes 			 * stopped until released by the parent.
999df8bae1dSRodney W. Grimes 			 */
1000df8bae1dSRodney W. Grimes 			p->p_xstat = signum;
1001df8bae1dSRodney W. Grimes 			psignal(p->p_pptr, SIGCHLD);
1002df8bae1dSRodney W. Grimes 			do {
1003df8bae1dSRodney W. Grimes 				stop(p);
1004df8bae1dSRodney W. Grimes 				mi_switch();
10052a024a2bSSean Eric Fagan 			} while (!trace_req(p)
10062a024a2bSSean Eric Fagan 				 && p->p_flag & P_TRACED);
1007df8bae1dSRodney W. Grimes 
1008df8bae1dSRodney W. Grimes 			/*
1009df8bae1dSRodney W. Grimes 			 * If the traced bit got turned off, go back up
1010df8bae1dSRodney W. Grimes 			 * to the top to rescan signals.  This ensures
1011df8bae1dSRodney W. Grimes 			 * that p_sig* and ps_sigact are consistent.
1012df8bae1dSRodney W. Grimes 			 */
1013df8bae1dSRodney W. Grimes 			if ((p->p_flag & P_TRACED) == 0)
1014df8bae1dSRodney W. Grimes 				continue;
1015df8bae1dSRodney W. Grimes 
1016df8bae1dSRodney W. Grimes 			/*
1017df8bae1dSRodney W. Grimes 			 * If parent wants us to take the signal,
1018df8bae1dSRodney W. Grimes 			 * then it will leave it in p->p_xstat;
1019df8bae1dSRodney W. Grimes 			 * otherwise we just look for signals again.
1020df8bae1dSRodney W. Grimes 			 */
1021df8bae1dSRodney W. Grimes 			p->p_siglist &= ~mask;	/* clear the old signal */
1022df8bae1dSRodney W. Grimes 			signum = p->p_xstat;
1023df8bae1dSRodney W. Grimes 			if (signum == 0)
1024df8bae1dSRodney W. Grimes 				continue;
1025df8bae1dSRodney W. Grimes 
1026df8bae1dSRodney W. Grimes 			/*
1027df8bae1dSRodney W. Grimes 			 * Put the new signal into p_siglist.  If the
1028df8bae1dSRodney W. Grimes 			 * signal is being masked, look for other signals.
1029df8bae1dSRodney W. Grimes 			 */
1030df8bae1dSRodney W. Grimes 			mask = sigmask(signum);
1031df8bae1dSRodney W. Grimes 			p->p_siglist |= mask;
1032df8bae1dSRodney W. Grimes 			if (p->p_sigmask & mask)
1033df8bae1dSRodney W. Grimes 				continue;
1034df8bae1dSRodney W. Grimes 		}
1035df8bae1dSRodney W. Grimes 
1036df8bae1dSRodney W. Grimes 		/*
1037df8bae1dSRodney W. Grimes 		 * Decide whether the signal should be returned.
1038df8bae1dSRodney W. Grimes 		 * Return the signal's number, or fall through
1039df8bae1dSRodney W. Grimes 		 * to clear it from the pending mask.
1040df8bae1dSRodney W. Grimes 		 */
1041a23d65bfSBruce Evans 		switch ((int)(intptr_t)p->p_sigacts->ps_sigact[signum]) {
1042df8bae1dSRodney W. Grimes 
10430b53fbe8SBruce Evans 		case (int)SIG_DFL:
1044df8bae1dSRodney W. Grimes 			/*
1045df8bae1dSRodney W. Grimes 			 * Don't take default actions on system processes.
1046df8bae1dSRodney W. Grimes 			 */
1047df8bae1dSRodney W. Grimes 			if (p->p_pid <= 1) {
1048df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC
1049df8bae1dSRodney W. Grimes 				/*
1050df8bae1dSRodney W. Grimes 				 * Are you sure you want to ignore SIGSEGV
1051df8bae1dSRodney W. Grimes 				 * in init? XXX
1052df8bae1dSRodney W. Grimes 				 */
1053d93f860cSPoul-Henning Kamp 				printf("Process (pid %lu) got signal %d\n",
1054d93f860cSPoul-Henning Kamp 					(u_long)p->p_pid, signum);
1055df8bae1dSRodney W. Grimes #endif
1056df8bae1dSRodney W. Grimes 				break;		/* == ignore */
1057df8bae1dSRodney W. Grimes 			}
1058df8bae1dSRodney W. Grimes 			/*
1059df8bae1dSRodney W. Grimes 			 * If there is a pending stop signal to process
1060df8bae1dSRodney W. Grimes 			 * with default action, stop here,
1061df8bae1dSRodney W. Grimes 			 * then clear the signal.  However,
1062df8bae1dSRodney W. Grimes 			 * if process is member of an orphaned
1063df8bae1dSRodney W. Grimes 			 * process group, ignore tty stop signals.
1064df8bae1dSRodney W. Grimes 			 */
1065df8bae1dSRodney W. Grimes 			if (prop & SA_STOP) {
1066df8bae1dSRodney W. Grimes 				if (p->p_flag & P_TRACED ||
1067df8bae1dSRodney W. Grimes 		    		    (p->p_pgrp->pg_jobc == 0 &&
1068df8bae1dSRodney W. Grimes 				    prop & SA_TTYSTOP))
1069df8bae1dSRodney W. Grimes 					break;	/* == ignore */
1070df8bae1dSRodney W. Grimes 				p->p_xstat = signum;
1071df8bae1dSRodney W. Grimes 				stop(p);
1072df8bae1dSRodney W. Grimes 				if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0)
1073df8bae1dSRodney W. Grimes 					psignal(p->p_pptr, SIGCHLD);
1074df8bae1dSRodney W. Grimes 				mi_switch();
1075df8bae1dSRodney W. Grimes 				break;
1076df8bae1dSRodney W. Grimes 			} else if (prop & SA_IGNORE) {
1077df8bae1dSRodney W. Grimes 				/*
1078df8bae1dSRodney W. Grimes 				 * Except for SIGCONT, shouldn't get here.
1079df8bae1dSRodney W. Grimes 				 * Default action is to ignore; drop it.
1080df8bae1dSRodney W. Grimes 				 */
1081df8bae1dSRodney W. Grimes 				break;		/* == ignore */
1082df8bae1dSRodney W. Grimes 			} else
1083df8bae1dSRodney W. Grimes 				return (signum);
1084df8bae1dSRodney W. Grimes 			/*NOTREACHED*/
1085df8bae1dSRodney W. Grimes 
10860b53fbe8SBruce Evans 		case (int)SIG_IGN:
1087df8bae1dSRodney W. Grimes 			/*
1088df8bae1dSRodney W. Grimes 			 * Masking above should prevent us ever trying
1089df8bae1dSRodney W. Grimes 			 * to take action on an ignored signal other
1090df8bae1dSRodney W. Grimes 			 * than SIGCONT, unless process is traced.
1091df8bae1dSRodney W. Grimes 			 */
1092df8bae1dSRodney W. Grimes 			if ((prop & SA_CONT) == 0 &&
1093df8bae1dSRodney W. Grimes 			    (p->p_flag & P_TRACED) == 0)
1094df8bae1dSRodney W. Grimes 				printf("issignal\n");
1095df8bae1dSRodney W. Grimes 			break;		/* == ignore */
1096df8bae1dSRodney W. Grimes 
1097df8bae1dSRodney W. Grimes 		default:
1098df8bae1dSRodney W. Grimes 			/*
1099df8bae1dSRodney W. Grimes 			 * This signal has an action, let
1100df8bae1dSRodney W. Grimes 			 * postsig() process it.
1101df8bae1dSRodney W. Grimes 			 */
1102df8bae1dSRodney W. Grimes 			return (signum);
1103df8bae1dSRodney W. Grimes 		}
1104df8bae1dSRodney W. Grimes 		p->p_siglist &= ~mask;		/* take the signal! */
1105df8bae1dSRodney W. Grimes 	}
1106df8bae1dSRodney W. Grimes 	/* NOTREACHED */
1107df8bae1dSRodney W. Grimes }
1108df8bae1dSRodney W. Grimes 
1109df8bae1dSRodney W. Grimes /*
1110df8bae1dSRodney W. Grimes  * Put the argument process into the stopped state and notify the parent
1111df8bae1dSRodney W. Grimes  * via wakeup.  Signals are handled elsewhere.  The process must not be
1112df8bae1dSRodney W. Grimes  * on the run queue.
1113df8bae1dSRodney W. Grimes  */
111426f9a767SRodney W. Grimes void
1115df8bae1dSRodney W. Grimes stop(p)
1116df8bae1dSRodney W. Grimes 	register struct proc *p;
1117df8bae1dSRodney W. Grimes {
1118df8bae1dSRodney W. Grimes 
1119df8bae1dSRodney W. Grimes 	p->p_stat = SSTOP;
1120df8bae1dSRodney W. Grimes 	p->p_flag &= ~P_WAITED;
1121df8bae1dSRodney W. Grimes 	wakeup((caddr_t)p->p_pptr);
1122df8bae1dSRodney W. Grimes }
1123df8bae1dSRodney W. Grimes 
1124df8bae1dSRodney W. Grimes /*
1125df8bae1dSRodney W. Grimes  * Take the action for the specified signal
1126df8bae1dSRodney W. Grimes  * from the current set of pending signals.
1127df8bae1dSRodney W. Grimes  */
1128df8bae1dSRodney W. Grimes void
1129df8bae1dSRodney W. Grimes postsig(signum)
1130df8bae1dSRodney W. Grimes 	register int signum;
1131df8bae1dSRodney W. Grimes {
1132df8bae1dSRodney W. Grimes 	register struct proc *p = curproc;
1133df8bae1dSRodney W. Grimes 	register struct sigacts *ps = p->p_sigacts;
1134df8bae1dSRodney W. Grimes 	register sig_t action;
1135df8bae1dSRodney W. Grimes 	int code, mask, returnmask;
1136df8bae1dSRodney W. Grimes 
1137df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC
1138df8bae1dSRodney W. Grimes 	if (signum == 0)
1139df8bae1dSRodney W. Grimes 		panic("postsig");
1140df8bae1dSRodney W. Grimes #endif
1141df8bae1dSRodney W. Grimes 	mask = sigmask(signum);
1142df8bae1dSRodney W. Grimes 	p->p_siglist &= ~mask;
1143df8bae1dSRodney W. Grimes 	action = ps->ps_sigact[signum];
1144df8bae1dSRodney W. Grimes #ifdef KTRACE
1145df8bae1dSRodney W. Grimes 	if (KTRPOINT(p, KTR_PSIG))
1146df8bae1dSRodney W. Grimes 		ktrpsig(p->p_tracep,
1147df8bae1dSRodney W. Grimes 		    signum, action, ps->ps_flags & SAS_OLDMASK ?
1148df8bae1dSRodney W. Grimes 		    ps->ps_oldmask : p->p_sigmask, 0);
1149df8bae1dSRodney W. Grimes #endif
11502a024a2bSSean Eric Fagan 	STOPEVENT(p, S_SIG, signum);
11512a024a2bSSean Eric Fagan 
1152df8bae1dSRodney W. Grimes 	if (action == SIG_DFL) {
1153df8bae1dSRodney W. Grimes 		/*
1154df8bae1dSRodney W. Grimes 		 * Default action, where the default is to kill
1155df8bae1dSRodney W. Grimes 		 * the process.  (Other cases were ignored above.)
1156df8bae1dSRodney W. Grimes 		 */
1157df8bae1dSRodney W. Grimes 		sigexit(p, signum);
1158df8bae1dSRodney W. Grimes 		/* NOTREACHED */
1159df8bae1dSRodney W. Grimes 	} else {
1160df8bae1dSRodney W. Grimes 		/*
1161df8bae1dSRodney W. Grimes 		 * If we get here, the signal must be caught.
1162df8bae1dSRodney W. Grimes 		 */
1163df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC
1164df8bae1dSRodney W. Grimes 		if (action == SIG_IGN || (p->p_sigmask & mask))
1165df8bae1dSRodney W. Grimes 			panic("postsig action");
1166df8bae1dSRodney W. Grimes #endif
1167df8bae1dSRodney W. Grimes 		/*
1168df8bae1dSRodney W. Grimes 		 * Set the new mask value and also defer further
1169df8bae1dSRodney W. Grimes 		 * occurences of this signal.
1170df8bae1dSRodney W. Grimes 		 *
1171df8bae1dSRodney W. Grimes 		 * Special case: user has done a sigpause.  Here the
1172df8bae1dSRodney W. Grimes 		 * current mask is not of interest, but rather the
1173df8bae1dSRodney W. Grimes 		 * mask from before the sigpause is what we want
1174df8bae1dSRodney W. Grimes 		 * restored after the signal processing is completed.
1175df8bae1dSRodney W. Grimes 		 */
1176df8bae1dSRodney W. Grimes 		(void) splhigh();
1177df8bae1dSRodney W. Grimes 		if (ps->ps_flags & SAS_OLDMASK) {
1178df8bae1dSRodney W. Grimes 			returnmask = ps->ps_oldmask;
1179df8bae1dSRodney W. Grimes 			ps->ps_flags &= ~SAS_OLDMASK;
1180df8bae1dSRodney W. Grimes 		} else
1181df8bae1dSRodney W. Grimes 			returnmask = p->p_sigmask;
1182289ccde0SPeter Wemm 		p->p_sigmask |= ps->ps_catchmask[signum] |
1183289ccde0SPeter Wemm 				(mask & ~ps->ps_signodefer);
1184dedc04feSPeter Wemm 		if ((ps->ps_sigreset & mask) != 0) {
1185289ccde0SPeter Wemm 			/*
1186289ccde0SPeter Wemm 			 * See setsigvec() for origin of this code.
1187289ccde0SPeter Wemm 			 */
1188dedc04feSPeter Wemm 			p->p_sigcatch &= ~mask;
1189dedc04feSPeter Wemm 			if (signum != SIGCONT && sigprop[signum] & SA_IGNORE)
1190dedc04feSPeter Wemm 				p->p_sigignore |= mask;
1191dedc04feSPeter Wemm 			ps->ps_sigact[signum] = SIG_DFL;
1192dedc04feSPeter Wemm 		}
1193df8bae1dSRodney W. Grimes 		(void) spl0();
1194df8bae1dSRodney W. Grimes 		p->p_stats->p_ru.ru_nsignals++;
1195df8bae1dSRodney W. Grimes 		if (ps->ps_sig != signum) {
1196df8bae1dSRodney W. Grimes 			code = 0;
1197df8bae1dSRodney W. Grimes 		} else {
1198df8bae1dSRodney W. Grimes 			code = ps->ps_code;
1199df8bae1dSRodney W. Grimes 			ps->ps_code = 0;
12008674077aSJeffrey Hsu 			ps->ps_sig = 0;
1201df8bae1dSRodney W. Grimes 		}
1202d66a5066SPeter Wemm 		(*p->p_sysent->sv_sendsig)(action, signum, returnmask, code);
1203df8bae1dSRodney W. Grimes 	}
1204df8bae1dSRodney W. Grimes }
1205df8bae1dSRodney W. Grimes 
1206df8bae1dSRodney W. Grimes /*
1207df8bae1dSRodney W. Grimes  * Kill the current process for stated reason.
1208df8bae1dSRodney W. Grimes  */
120926f9a767SRodney W. Grimes void
1210df8bae1dSRodney W. Grimes killproc(p, why)
1211df8bae1dSRodney W. Grimes 	struct proc *p;
1212df8bae1dSRodney W. Grimes 	char *why;
1213df8bae1dSRodney W. Grimes {
1214729b1e51SDavid Greenman 	log(LOG_ERR, "pid %d (%s), uid %d, was killed: %s\n", p->p_pid, p->p_comm,
1215729b1e51SDavid Greenman 		p->p_cred && p->p_ucred ? p->p_ucred->cr_uid : -1, why);
1216df8bae1dSRodney W. Grimes 	psignal(p, SIGKILL);
1217df8bae1dSRodney W. Grimes }
1218df8bae1dSRodney W. Grimes 
1219df8bae1dSRodney W. Grimes /*
1220df8bae1dSRodney W. Grimes  * Force the current process to exit with the specified signal, dumping core
1221df8bae1dSRodney W. Grimes  * if appropriate.  We bypass the normal tests for masked and caught signals,
1222df8bae1dSRodney W. Grimes  * allowing unrecoverable failures to terminate the process without changing
1223df8bae1dSRodney W. Grimes  * signal state.  Mark the accounting record with the signal termination.
1224df8bae1dSRodney W. Grimes  * If dumping core, save the signal number for the debugger.  Calls exit and
1225df8bae1dSRodney W. Grimes  * does not return.
1226df8bae1dSRodney W. Grimes  */
122726f9a767SRodney W. Grimes void
1228df8bae1dSRodney W. Grimes sigexit(p, signum)
1229df8bae1dSRodney W. Grimes 	register struct proc *p;
1230df8bae1dSRodney W. Grimes 	int signum;
1231df8bae1dSRodney W. Grimes {
1232df8bae1dSRodney W. Grimes 
1233df8bae1dSRodney W. Grimes 	p->p_acflag |= AXSIG;
1234df8bae1dSRodney W. Grimes 	if (sigprop[signum] & SA_CORE) {
1235df8bae1dSRodney W. Grimes 		p->p_sigacts->ps_sig = signum;
1236c364e17eSAndrey A. Chernov 		/*
1237c364e17eSAndrey A. Chernov 		 * Log signals which would cause core dumps
1238c364e17eSAndrey A. Chernov 		 * (Log as LOG_INFO to appease those who don't want
1239c364e17eSAndrey A. Chernov 		 * these messages.)
1240c364e17eSAndrey A. Chernov 		 * XXX : Todo, as well as euid, write out ruid too
1241c364e17eSAndrey A. Chernov 		 */
124222d4b0fbSJohn Polstra 		if (p->p_sysent->sv_coredump != NULL &&
124322d4b0fbSJohn Polstra 		    (*p->p_sysent->sv_coredump)(p) == 0)
1244df8bae1dSRodney W. Grimes 			signum |= WCOREFLAG;
124557308494SJoerg Wunsch 		if (kern_logsigexit)
124657308494SJoerg Wunsch 			log(LOG_INFO,
124757308494SJoerg Wunsch 			    "pid %d (%s), uid %d: exited on signal %d%s\n",
12483d1b21c6SAndrey A. Chernov 			    p->p_pid, p->p_comm,
12493d1b21c6SAndrey A. Chernov 			    p->p_cred && p->p_ucred ? p->p_ucred->cr_uid : -1,
12503d1b21c6SAndrey A. Chernov 			    signum &~ WCOREFLAG,
12513d1b21c6SAndrey A. Chernov 			    signum & WCOREFLAG ? " (core dumped)" : "");
1252df8bae1dSRodney W. Grimes 	}
1253df8bae1dSRodney W. Grimes 	exit1(p, W_EXITCODE(0, signum));
1254df8bae1dSRodney W. Grimes 	/* NOTREACHED */
1255df8bae1dSRodney W. Grimes }
1256df8bae1dSRodney W. Grimes 
1257c5edb423SSean Eric Fagan static char corefilename[MAXPATHLEN+1] = {"%N.core"};
1258c5edb423SSean Eric Fagan SYSCTL_STRING(_kern, OID_AUTO, corefile, CTLFLAG_RW, corefilename,
1259c5edb423SSean Eric Fagan 	      sizeof(corefilename), "process corefile name format string");
1260c5edb423SSean Eric Fagan 
1261c5edb423SSean Eric Fagan /*
1262c5edb423SSean Eric Fagan  * expand_name(name, uid, pid)
1263c5edb423SSean Eric Fagan  * Expand the name described in corefilename, using name, uid, and pid.
1264c5edb423SSean Eric Fagan  * corefilename is a printf-like string, with three format specifiers:
1265c5edb423SSean Eric Fagan  *	%N	name of process ("name")
1266c5edb423SSean Eric Fagan  *	%P	process id (pid)
1267c5edb423SSean Eric Fagan  *	%U	user id (uid)
1268c5edb423SSean Eric Fagan  * For example, "%N.core" is the default; they can be disabled completely
1269c5edb423SSean Eric Fagan  * by using "/dev/null", or all core files can be stored in "/cores/%U/%N-%P".
1270c5edb423SSean Eric Fagan  * This is controlled by the sysctl variable kern.corefile (see above).
1271c5edb423SSean Eric Fagan  */
1272c5edb423SSean Eric Fagan 
127322d4b0fbSJohn Polstra char *
1274c5edb423SSean Eric Fagan expand_name(name, uid, pid)
1275c5edb423SSean Eric Fagan const char *name; int uid; int pid; {
1276c5edb423SSean Eric Fagan 	char *temp;
1277c5edb423SSean Eric Fagan 	char buf[11];		/* Buffer for pid/uid -- max 4B */
1278c5edb423SSean Eric Fagan 	int i, n;
1279c5edb423SSean Eric Fagan 	char *format = corefilename;
1280c5edb423SSean Eric Fagan 
1281c5edb423SSean Eric Fagan 	temp = malloc(MAXPATHLEN + 3, M_TEMP, M_NOWAIT);
1282c5edb423SSean Eric Fagan 	bzero(temp, MAXPATHLEN+3);
1283c5edb423SSean Eric Fagan 	for (i = 0, n = 0; i < MAXPATHLEN && format[i]; i++) {
1284c5edb423SSean Eric Fagan 		int l;
1285c5edb423SSean Eric Fagan 		switch (format[i]) {
1286c5edb423SSean Eric Fagan 		case '%':	/* Format character */
1287c5edb423SSean Eric Fagan 			i++;
1288c5edb423SSean Eric Fagan 			switch (format[i]) {
1289c5edb423SSean Eric Fagan 			case '%':
1290c5edb423SSean Eric Fagan 				temp[n++] = '%';
1291c5edb423SSean Eric Fagan 				break;
1292c5edb423SSean Eric Fagan 			case 'N':	/* process name */
1293c5edb423SSean Eric Fagan 				l = strlen(name);
1294c5edb423SSean Eric Fagan 				if ((n + l) > MAXPATHLEN) {
1295c5edb423SSean Eric Fagan 					log(LOG_ERR, "pid %d (%s), uid (%d):  Path `%s%s' is too long\n",
1296c5edb423SSean Eric Fagan 					    pid, name, uid, temp, name);
1297c5edb423SSean Eric Fagan 					free(temp, M_TEMP);
1298c5edb423SSean Eric Fagan 					return NULL;
1299c5edb423SSean Eric Fagan 				}
1300c5edb423SSean Eric Fagan 				memcpy(temp+n, name, l);
1301c5edb423SSean Eric Fagan 				n += l;
1302c5edb423SSean Eric Fagan 				break;
1303c5edb423SSean Eric Fagan 			case 'P':	/* process id */
1304c5edb423SSean Eric Fagan 				sprintf(buf, "%u", pid);
1305c5edb423SSean Eric Fagan 				l = strlen(buf);
1306c5edb423SSean Eric Fagan 				if ((n + l) > MAXPATHLEN) {
1307c5edb423SSean Eric Fagan 					log(LOG_ERR, "pid %d (%s), uid (%d):  Path `%s%s' is too long\n",
1308c5edb423SSean Eric Fagan 					    pid, name, uid, temp, name);
1309c5edb423SSean Eric Fagan 					free(temp, M_TEMP);
1310c5edb423SSean Eric Fagan 					return NULL;
1311c5edb423SSean Eric Fagan 				}
1312c5edb423SSean Eric Fagan 				memcpy(temp+n, buf, l);
1313c5edb423SSean Eric Fagan 				n += l;
1314c5edb423SSean Eric Fagan 				break;
1315c5edb423SSean Eric Fagan 			case 'U':	/* user id */
1316c5edb423SSean Eric Fagan 				sprintf(buf, "%u", uid);
1317c5edb423SSean Eric Fagan 				l = strlen(buf);
1318c5edb423SSean Eric Fagan 				if ((n + l) > MAXPATHLEN) {
1319c5edb423SSean Eric Fagan 					log(LOG_ERR, "pid %d (%s), uid (%d):  Path `%s%s' is too long\n",
1320c5edb423SSean Eric Fagan 					    pid, name, uid, temp, name);
1321c5edb423SSean Eric Fagan 					free(temp, M_TEMP);
1322c5edb423SSean Eric Fagan 					return NULL;
1323c5edb423SSean Eric Fagan 				}
1324c5edb423SSean Eric Fagan 				memcpy(temp+n, buf, l);
1325c5edb423SSean Eric Fagan 				n += l;
1326c5edb423SSean Eric Fagan 				break;
1327c5edb423SSean Eric Fagan 			default:
1328c5edb423SSean Eric Fagan 			  	log(LOG_ERR, "Unknown format character %c in `%s'\n", format[i], format);
1329c5edb423SSean Eric Fagan 			}
1330c5edb423SSean Eric Fagan 			break;
1331c5edb423SSean Eric Fagan 		default:
1332c5edb423SSean Eric Fagan 			temp[n++] = format[i];
1333c5edb423SSean Eric Fagan 		}
1334c5edb423SSean Eric Fagan 	}
1335c5edb423SSean Eric Fagan 	return temp;
1336c5edb423SSean Eric Fagan }
1337c5edb423SSean Eric Fagan 
1338df8bae1dSRodney W. Grimes /*
1339df8bae1dSRodney W. Grimes  * Nonexistent system call-- signal process (may want to handle it).
1340df8bae1dSRodney W. Grimes  * Flag error in case process won't see signal immediately (blocked or ignored).
1341df8bae1dSRodney W. Grimes  */
1342d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_
1343df8bae1dSRodney W. Grimes struct nosys_args {
1344df8bae1dSRodney W. Grimes 	int	dummy;
1345df8bae1dSRodney W. Grimes };
1346d2d3e875SBruce Evans #endif
1347df8bae1dSRodney W. Grimes /* ARGSUSED */
134826f9a767SRodney W. Grimes int
1349cb226aaaSPoul-Henning Kamp nosys(p, args)
1350df8bae1dSRodney W. Grimes 	struct proc *p;
1351df8bae1dSRodney W. Grimes 	struct nosys_args *args;
1352df8bae1dSRodney W. Grimes {
1353df8bae1dSRodney W. Grimes 
1354df8bae1dSRodney W. Grimes 	psignal(p, SIGSYS);
1355df8bae1dSRodney W. Grimes 	return (EINVAL);
1356df8bae1dSRodney W. Grimes }
1357831d27a9SDon Lewis 
1358831d27a9SDon Lewis /*
1359831d27a9SDon Lewis  * Send a signal to a SIGIO or SIGURG to a process or process group using
1360831d27a9SDon Lewis  * stored credentials rather than those of the current process.
1361831d27a9SDon Lewis  */
1362831d27a9SDon Lewis void
1363831d27a9SDon Lewis pgsigio(sigio, signum, checkctty)
1364831d27a9SDon Lewis 	struct sigio *sigio;
1365831d27a9SDon Lewis 	int signum, checkctty;
1366831d27a9SDon Lewis {
1367831d27a9SDon Lewis 	if (sigio == NULL)
1368831d27a9SDon Lewis 		return;
1369831d27a9SDon Lewis 
1370831d27a9SDon Lewis 	if (sigio->sio_pgid > 0) {
1371831d27a9SDon Lewis 		if (CANSIGIO(sigio->sio_ruid, sigio->sio_ucred,
1372831d27a9SDon Lewis 		             sigio->sio_proc))
1373831d27a9SDon Lewis 			psignal(sigio->sio_proc, signum);
1374831d27a9SDon Lewis 	} else if (sigio->sio_pgid < 0) {
1375831d27a9SDon Lewis 		struct proc *p;
1376831d27a9SDon Lewis 
1377831d27a9SDon Lewis 		for (p = sigio->sio_pgrp->pg_members.lh_first; p != NULL;
1378831d27a9SDon Lewis 		     p = p->p_pglist.le_next)
1379831d27a9SDon Lewis 			if (CANSIGIO(sigio->sio_ruid, sigio->sio_ucred, p) &&
1380831d27a9SDon Lewis 			    (checkctty == 0 || (p->p_flag & P_CONTROLT)))
1381831d27a9SDon Lewis 				psignal(p, signum);
1382831d27a9SDon Lewis 	}
1383831d27a9SDon Lewis }
1384