215 lines
6.5 KiB
C
215 lines
6.5 KiB
C
/* $NetBSD: svr4_signal.c,v 1.1 1994/10/24 17:37:44 deraadt 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. 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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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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: return SIGHUP;
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case SVR4_SIGINT: return SIGINT;
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case SVR4_SIGQUIT: return SIGQUIT;
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case SVR4_SIGILL: return SIGILL;
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case SVR4_SIGTRAP: return SIGTRAP;
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case SVR4_SIGABRT: return SIGABRT;
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case SVR4_SIGEMT: return SIGEMT;
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case SVR4_SIGFPE: return SIGFPE;
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case SVR4_SIGKILL: return SIGKILL;
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case SVR4_SIGBUS: return SIGBUS;
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case SVR4_SIGSEGV: return SIGSEGV;
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case SVR4_SIGSYS: return SIGSYS;
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case SVR4_SIGPIPE: return SIGPIPE;
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case SVR4_SIGALRM: return SIGALRM;
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case SVR4_SIGTERM: return SIGTERM;
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case SVR4_SIGUSR1: return SIGUSR1;
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case SVR4_SIGUSR2: return SIGUSR2;
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case SVR4_SIGCHLD: return SIGCHLD;
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case SVR4_SIGPWR: return NSIG;
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case SVR4_SIGWINCH: return SIGWINCH;
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case SVR4_SIGURG: return SIGURG;
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case SVR4_SIGIO: return SIGIO;
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case SVR4_SIGSTOP: return SIGSTOP;
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case SVR4_SIGTSTP: return SIGTSTP;
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case SVR4_SIGCONT: return SIGCONT;
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case SVR4_SIGTTIN: return SIGTTIN;
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case SVR4_SIGTTOU: return SIGTTOU;
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case SVR4_SIGVTALRM:return SIGVTALRM;
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case SVR4_SIGPROF: return SIGPROF;
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case SVR4_SIGXCPU: return SIGXCPU;
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case SVR4_SIGXFSZ: 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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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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stackgap_init();
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switch (SVR4_SIGCALL(SCARG(uap, signum))) {
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/*
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* sigset is identical to signal() except that SIG_HOLD is allowed as
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* an action and we don't set the bit in the ibcs_sigflags field.
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*/
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case SVR4_SIGDEFER_MASK:
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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(sizeof(struct sigaction));
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struct sigaction *osap = stackgap_alloc(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", 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)) == 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(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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