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/* $OpenBSD: freebsd_signal.c,v 1.3 2003/06/02 23:28:00 millert Exp $ */
/* $NetBSD: kern_sig.c,v 1.54 1996/04/22 01:38:32 christos Exp $ */
/*
* Copyright (c) 1997 Theo de Raadt. All rights reserved.
* Copyright (c) 1982, 1986, 1989, 1991, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)kern_sig.c 8.7 (Berkeley) 4/18/94
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/signal.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <compat/freebsd/freebsd_signal.h>
#include <compat/freebsd/freebsd_syscallargs.h>
static void freebsd_to_openbsd_sigaction(struct freebsd_sigaction *,
struct sigaction *);
static void openbsd_to_freebsd_sigaction(struct sigaction *,
struct freebsd_sigaction *);
static void
openbsd_to_freebsd_sigaction(obsa, fbsa)
struct sigaction *obsa;
struct freebsd_sigaction *fbsa;
{
bzero(fbsa, sizeof(struct freebsd_sigaction));
fbsa->freebsd_sa_handler = obsa->sa_handler;
bcopy(&obsa->sa_mask, &fbsa->freebsd_sa_mask.__bits[0],
sizeof(sigset_t));
fbsa->freebsd_sa_flags = obsa->sa_flags;
}
static void
freebsd_to_openbsd_sigaction(fbsa, obsa)
struct freebsd_sigaction *fbsa;
struct sigaction *obsa;
{
obsa->sa_handler = fbsa->freebsd_sa_handler;
bcopy(&fbsa->freebsd_sa_mask.__bits[0], &obsa->sa_mask,
sizeof(sigset_t));
obsa->sa_flags = fbsa->freebsd_sa_flags;
}
/* ARGSUSED */
int
freebsd_sys_sigaction40(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct freebsd_sys_sigaction40_args /* {
syscallarg(int) sig;
syscallarg(struct freebsd_sigaction *) act;
syscallarg(struct freebsd_sigaction *) oact;
} */ *uap = v;
struct sigaction vec;
register struct sigaction *sa;
struct freebsd_sigaction fbsa;
register struct sigacts *ps = p->p_sigacts;
register int signum;
int bit, error;
signum = SCARG(uap, sig);
if (signum <= 0 || signum >= NSIG ||
(SCARG(uap, act) && (signum == SIGKILL || signum == SIGSTOP)))
return (EINVAL);
sa = &vec;
if (SCARG(uap, oact)) {
sa->sa_handler = ps->ps_sigact[signum];
sa->sa_mask = ps->ps_catchmask[signum];
bit = sigmask(signum);
sa->sa_flags = 0;
if ((ps->ps_sigonstack & bit) != 0)
sa->sa_flags |= SA_ONSTACK;
if ((ps->ps_sigintr & bit) == 0)
sa->sa_flags |= SA_RESTART;
if ((ps->ps_sigreset & bit) != 0)
sa->sa_flags |= SA_RESETHAND;
if ((ps->ps_siginfo & bit) != 0)
sa->sa_flags |= SA_SIGINFO;
if (signum == SIGCHLD) {
if ((p->p_flag & P_NOCLDSTOP) != 0)
sa->sa_flags |= SA_NOCLDSTOP;
if ((p->p_flag & P_NOCLDWAIT) != 0)
sa->sa_flags |= SA_NOCLDWAIT;
}
if ((sa->sa_mask & bit) == 0)
sa->sa_flags |= SA_NODEFER;
sa->sa_mask &= ~bit;
openbsd_to_freebsd_sigaction(sa, &fbsa);
error = copyout((caddr_t)&fbsa, (caddr_t)SCARG(uap, oact),
sizeof (struct freebsd_sigaction));
if (error)
return (error);
}
if (SCARG(uap, act)) {
error = copyin((caddr_t)SCARG(uap, act), (caddr_t)&fbsa,
sizeof (struct freebsd_sigaction));
if (error)
return (error);
freebsd_to_openbsd_sigaction(&fbsa, sa);
setsigvec(p, signum, sa);
}
return (0);
}
/* ARGSUSED */
int
freebsd_sys_sigpending40(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct freebsd_sys_sigpending40_args /* {
freebsd_sigset_t *set;
} */ *uap = v;
freebsd_sigset_t fss;
bcopy(&p->p_siglist, &fss.__bits[0], sizeof(sigset_t));
return (copyout((caddr_t)&fss, (caddr_t)SCARG(uap, set), sizeof(fss)));
}
int
freebsd_sys_sigprocmask40(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_sigprocmask40_args /* {
syscallarg(int) how;
syscallarg(freebsd_sigset_t *) set;
syscallarg(freebsd_sigset_t *) oset;
} */ *uap = v;
freebsd_sigset_t nss, oss;
sigset_t obnss;
int error = 0;
if (SCARG(uap, set)) {
error = copyin(SCARG(uap, set), &nss, sizeof(nss));
if (error)
return (error);
}
if (SCARG(uap, oset)) {
bzero(&oss, sizeof(freebsd_sigset_t));
bcopy(&p->p_sigmask, &oss.__bits[0], sizeof(sigset_t));
error = copyout((caddr_t)&oss, (caddr_t)SCARG(uap, oset),
sizeof(freebsd_sigset_t));
if (error)
return (error);
}
if (SCARG(uap, set)) {
bcopy(&nss.__bits[0], &obnss, sizeof(sigset_t));
(void)splhigh();
switch (SCARG(uap, how)) {
case SIG_BLOCK:
p->p_sigmask |= obnss &~ sigcantmask;
break;
case SIG_UNBLOCK:
p->p_sigmask &= ~obnss;
break;
case SIG_SETMASK:
p->p_sigmask = obnss &~ sigcantmask;
break;
default:
error = EINVAL;
break;
}
(void) spl0();
}
return (error);
}
int
freebsd_sys_sigsuspend40(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_sigsuspend40_args /* {
syscallarg(freebsd_sigset_t *) sigmask;
} */ *uap = v;
register struct sigacts *ps = p->p_sigacts;
freebsd_sigset_t fbset;
sigset_t obset;
copyin(SCARG(uap, sigmask), &fbset, sizeof(freebsd_sigset_t));
bcopy(&fbset.__bits[0], &obset, sizeof(sigset_t));
/*
* When returning from sigpause, we want
* the old mask to be restored after the
* signal handler has finished. Thus, we
* save it here and mark the sigacts structure
* to indicate this.
*/
ps->ps_oldmask = p->p_sigmask;
ps->ps_flags |= SAS_OLDMASK;
p->p_sigmask = obset &~ sigcantmask;
while (tsleep((caddr_t) ps, PPAUSE|PCATCH, "pause", 0) == 0)
/* void */;
/* always return EINTR rather than ERESTART... */
return (EINTR);
}
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