248 lines
6.0 KiB
C
248 lines
6.0 KiB
C
/* $NetBSD: svr4_signal.c,v 1.4 1994/10/29 00:43:24 christos Exp $ */
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/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/namei.h>
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#include <sys/proc.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/syscallargs.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_syscallargs.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_signal.h>
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static int
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svr4_signumcvt(sn)
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int sn;
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{
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switch (sn) {
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case SVR4_SIGHUP:
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return SIGHUP;
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case SVR4_SIGINT:
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return SIGINT;
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case SVR4_SIGQUIT:
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return SIGQUIT;
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case SVR4_SIGILL:
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return SIGILL;
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case SVR4_SIGTRAP:
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return SIGTRAP;
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case SVR4_SIGABRT:
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return SIGABRT;
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case SVR4_SIGEMT:
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return SIGEMT;
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case SVR4_SIGFPE:
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return SIGFPE;
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case SVR4_SIGKILL:
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return SIGKILL;
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case SVR4_SIGBUS:
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return SIGBUS;
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case SVR4_SIGSEGV:
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return SIGSEGV;
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case SVR4_SIGSYS:
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return SIGSYS;
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case SVR4_SIGPIPE:
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return SIGPIPE;
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case SVR4_SIGALRM:
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return SIGALRM;
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case SVR4_SIGTERM:
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return SIGTERM;
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case SVR4_SIGUSR1:
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return SIGUSR1;
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case SVR4_SIGUSR2:
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return SIGUSR2;
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case SVR4_SIGCHLD:
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return SIGCHLD;
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case SVR4_SIGPWR:
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return NSIG;
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case SVR4_SIGWINCH:
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return SIGWINCH;
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case SVR4_SIGURG:
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return SIGURG;
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case SVR4_SIGIO:
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return SIGIO;
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case SVR4_SIGSTOP:
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return SIGSTOP;
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case SVR4_SIGTSTP:
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return SIGTSTP;
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case SVR4_SIGCONT:
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return SIGCONT;
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case SVR4_SIGTTIN:
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return SIGTTIN;
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case SVR4_SIGTTOU:
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return SIGTTOU;
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case SVR4_SIGVTALRM:
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return SIGVTALRM;
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case SVR4_SIGPROF:
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return SIGPROF;
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case SVR4_SIGXCPU:
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return SIGXCPU;
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case SVR4_SIGXFSZ:
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return SIGXFSZ;
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default:
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return NSIG;
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}
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}
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/*
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* Stolen from the ibcs2 one
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*/
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int
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svr4_signal(p, uap, retval)
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register struct proc *p;
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register struct svr4_signal_args *uap;
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register_t *retval;
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{
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int nsig = svr4_signumcvt(SVR4_SIGNO(SCARG(uap, signum)));
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int error;
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caddr_t sg = stackgap_init();
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if (nsig == NSIG) {
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if (SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGNAL_MASK ||
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SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGDEFER_MASK)
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*retval = (int) SVR4_SIG_ERR;
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return EINVAL;
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}
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switch (SVR4_SIGCALL(SCARG(uap, signum))) {
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case SVR4_SIGDEFER_MASK:
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/*
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* sigset is identical to signal() except
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* that SIG_HOLD is allowed as
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* an action and we don't set the bit
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* in the ibcs_sigflags field.
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*/
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if (SCARG(uap, handler) == SVR4_SIG_HOLD) {
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struct sigprocmask_args sa;
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SCARG(&sa, how) = SIG_BLOCK;
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SCARG(&sa, mask) = sigmask(nsig);
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return sigprocmask(p, &sa, retval);
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}
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/* FALLTHROUGH */
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case SVR4_SIGNAL_MASK:
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{
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struct sigaction_args sa_args;
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struct sigaction *sap = stackgap_alloc(&sg,
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sizeof(struct sigaction));
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struct sigaction *osap = stackgap_alloc(&sg,
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sizeof(struct sigaction));
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struct sigaction sa;
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SCARG(&sa_args, signum) = nsig;
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SCARG(&sa_args, nsa) = sap;
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SCARG(&sa_args, osa) = osap;
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sa.sa_handler = SCARG(uap, handler);
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sa.sa_mask = (sigset_t) 0;
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sa.sa_flags = 0;
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#if 0
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if (nsig != SIGALRM)
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sa.sa_flags = SA_RESTART;
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#endif
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error = copyout(&sa, sap, sizeof(sa));
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if (error)
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return error;
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error = sigaction(p, &sa_args, retval);
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if (error) {
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DPRINTF(("signal: sigaction failed: %d\n",
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error));
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*retval = (int) SVR4_SIG_ERR;
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return error;
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}
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error = copyin(osap, &sa, sizeof(sa));
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if (error)
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return error;
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*retval = (int) sa.sa_handler;
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if (SVR4_SIGCALL(SCARG(uap, signum)) ==
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SVR4_SIGNAL_MASK)
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p->p_md.ibcs_sigflags |= sigmask(nsig);
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return 0;
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}
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case SVR4_SIGHOLD_MASK:
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{
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struct sigprocmask_args sa;
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SCARG(&sa, how) = SIG_BLOCK;
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SCARG(&sa, mask) = sigmask(nsig);
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return sigprocmask(p, &sa, retval);
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}
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case SVR4_SIGRELSE_MASK:
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{
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struct sigprocmask_args sa;
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SCARG(&sa, how) = SIG_UNBLOCK;
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SCARG(&sa, mask) = sigmask(nsig);
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return sigprocmask(p, &sa, retval);
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}
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case SVR4_SIGIGNORE_MASK:
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{
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struct sigaction *sap = stackgap_alloc(&sg,
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sizeof(struct sigaction));
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struct sigaction sa;
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struct sigaction_args sa_args;
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SCARG(&sa_args, signum) = nsig;
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SCARG(&sa_args, nsa) = sap;
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SCARG(&sa_args, osa) = NULL;
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sa.sa_handler = SIG_IGN;
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sa.sa_mask = (sigset_t) 0;
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sa.sa_flags = 0;
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error = copyout(&sa, sap, sizeof(sa));
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if (error)
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return error;
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error = sigaction(p, &sa_args, retval);
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if (error) {
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DPRINTF(("sigignore: sigaction failed\n"));
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return error;
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}
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return 0;
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}
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case SVR4_SIGPAUSE_MASK:
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{
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struct sigsuspend_args sa;
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SCARG(&sa, mask) = p->p_sigmask & ~sigmask(nsig);
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return sigsuspend(p, &sa, retval);
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}
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default:
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return ENOSYS;
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}
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}
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