+/*
+ * Copyright (c) 1982, 1986, 1989, 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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 University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ * @(#)kern_sig.c 8.7 (Berkeley) 4/18/94
+ */
+
+#define SIGPROP /* include signal properties table */
+#include <sys/param.h>
+#include <sys/signalvar.h>
+#include <sys/resourcevar.h>
+#include <sys/namei.h>
+#include <sys/vnode.h>
+#include <sys/proc.h>
+#include <sys/systm.h>
+#include <sys/timeb.h>
+#include <sys/times.h>
+#include <sys/buf.h>
+#include <sys/acct.h>
+#include <sys/file.h>
+#include <sys/kernel.h>
+#include <sys/wait.h>
+#include <sys/ktrace.h>
+#include <sys/syslog.h>
+#include <sys/stat.h>
+
+#include <machine/cpu.h>
+
+#include <vm/vm.h>
+#include <sys/user.h> /* for coredump */
+
+/*
+ * Can process p, with pcred pc, send the signal signum to process q?
+ */
+#define CANSIGNAL(p, pc, q, signum) \
+ ((pc)->pc_ucred->cr_uid == 0 || \
+ (pc)->p_ruid == (q)->p_cred->p_ruid || \
+ (pc)->pc_ucred->cr_uid == (q)->p_cred->p_ruid || \
+ (pc)->p_ruid == (q)->p_ucred->cr_uid || \
+ (pc)->pc_ucred->cr_uid == (q)->p_ucred->cr_uid || \
+ ((signum) == SIGCONT && (q)->p_session == (p)->p_session))
+
+struct sigaction_args {
+ int signum;
+ struct sigaction *nsa;
+ struct sigaction *osa;
+};
+/* ARGSUSED */
+sigaction(p, uap, retval)
+ struct proc *p;
+ register struct sigaction_args *uap;
+ int *retval;