1d8f5f2ea3
zeroes) if the mapped signal number comes up zero. Previously, sigaction1() would return an error, confusing some linux apps trying to set handlers for "all" signals.
113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
/* $NetBSD: linux_sigaction.c,v 1.20 2000/08/09 20:20:49 tv 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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/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/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 */
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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(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_sigaction_args /* {
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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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} */ *uap = v;
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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(&nlsa, &nbsa);
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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_sig[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(p, linux_to_native_sig[sig],
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SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 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(&obsa, &olsa);
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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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