109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/* $NetBSD: linux_sigaction.c,v 1.34 2008/10/17 20:21:34 njoly Exp $ */
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/*-
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* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Frank van der Linden and Eric Haszlakiewicz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_sigaction.c,v 1.34 2008/10/17 20:21:34 njoly Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/filedesc.h>
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#include <sys/mount.h>
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#include <sys/kernel.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/syscallargs.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/common/linux_ipc.h>
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#include <compat/linux/common/linux_sem.h>
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#include <compat/linux/linux_syscallargs.h>
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/* Used on: alpha (aka osf_sigaction), arm, i386, m68k, mips, ppc */
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/* Not used on: sparc, sparc64, amd64 */
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/*
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* The Linux sigaction() system call. Do the usual conversions,
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* and just call sigaction().
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*/
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int
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linux_sys_sigaction(struct lwp *l, const struct linux_sys_sigaction_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) signum;
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syscallarg(const struct linux_old_sigaction *) nsa;
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syscallarg(struct linux_old_sigaction *) osa;
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} */
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struct linux_old_sigaction nlsa, olsa;
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struct sigaction nbsa, obsa;
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int error, sig;
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/* XXX XAX handle switch to RT signal handler */
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/* XXX XAX and update emuldata->ps_siginfo. */
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if (SCARG(uap, nsa)) {
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error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa));
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if (error)
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return (error);
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linux_old_to_native_sigaction(&nbsa, &nlsa);
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}
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sig = SCARG(uap, signum);
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if (sig < 0 || sig >= LINUX__NSIG)
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return (EINVAL);
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if (sig > 0 && !linux_to_native_signo[sig]) {
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/* Pretend that we did something useful for unknown signals. */
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obsa.sa_handler = SIG_IGN;
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sigemptyset(&obsa.sa_mask);
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obsa.sa_flags = 0;
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} else {
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error = sigaction1(l, linux_to_native_signo[sig],
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SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0,
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NULL, 0);
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if (error)
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return (error);
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}
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if (SCARG(uap, osa)) {
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native_to_linux_old_sigaction(&olsa, &obsa);
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error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
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if (error)
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return (error);
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}
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return (0);
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}
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