NetBSD/sys/compat/linux/common/linux_sigaction.c

116 lines
4.0 KiB
C

/* $NetBSD: linux_sigaction.c,v 1.21 2001/11/13 02:08:58 lukem Exp $ */
/*-
* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_sigaction.c,v 1.21 2001/11/13 02:08:58 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/linux_syscallargs.h>
/* Used on: alpha (aka osf_sigaction), arm, i386, m68k, mips, ppc */
/* Not used on: sparc, sparc64 */
/*
* The Linux sigaction() system call. Do the usual conversions,
* and just call sigaction().
*/
int
linux_sys_sigaction(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_sigaction_args /* {
syscallarg(int) signum;
syscallarg(const struct linux_old_sigaction *) nsa;
syscallarg(struct linux_old_sigaction *) osa;
} */ *uap = v;
struct linux_old_sigaction nlsa, olsa;
struct sigaction nbsa, obsa;
int error, sig;
/* XXX XAX handle switch to RT signal handler */
/* XXX XAX and update emuldata->ps_siginfo. */
if (SCARG(uap, nsa)) {
error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa));
if (error)
return (error);
linux_old_to_native_sigaction(&nlsa, &nbsa);
}
sig = SCARG(uap, signum);
if (sig < 0 || sig >= LINUX__NSIG)
return (EINVAL);
if (sig > 0 && !linux_to_native_sig[sig]) {
/* Pretend that we did something useful for unknown signals. */
obsa.sa_handler = SIG_IGN;
sigemptyset(&obsa.sa_mask);
obsa.sa_flags = 0;
} else {
error = sigaction1(p, linux_to_native_sig[sig],
SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0);
if (error)
return (error);
}
if (SCARG(uap, osa)) {
native_to_linux_old_sigaction(&obsa, &olsa);
error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
if (error)
return (error);
}
return (0);
}