2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1988, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * Important: This file is used both as a standalone program /bin/kill and
33 * as a builtin for /bin/sh (#define SHELL).
38 static char const copyright[] =
39 "@(#) Copyright (c) 1988, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
44 static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95";
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
60 #include "bltin/bltin.h"
63 static void nosig(const char *);
64 static void printsignals(FILE *);
65 static int signame_to_signum(const char *);
66 static void usage(void);
69 main(int argc, char *argv[])
73 int errors, numsig, ret;
82 if (!strcmp(*argv, "-l")) {
89 numsig = strtol(*argv, &ep, 10);
91 errx(2, "illegal signal number: %s", *argv);
94 if (numsig <= 0 || numsig >= sys_nsig)
96 printf("%s\n", sys_signame[numsig]);
103 if (!strcmp(*argv, "-s")) {
106 warnx("option requires an argument -- s");
109 if (strcmp(*argv, "0")) {
110 if ((numsig = signame_to_signum(*argv)) < 0)
115 } else if (**argv == '-' && *(*argv + 1) != '-') {
117 if (isalpha(**argv)) {
118 if ((numsig = signame_to_signum(*argv)) < 0)
120 } else if (isdigit(**argv)) {
121 numsig = strtol(*argv, &ep, 10);
123 errx(2, "illegal signal number: %s", *argv);
131 if (argc > 0 && strncmp(*argv, "--", 2) == 0)
137 for (errors = 0; argc; argc--, argv++) {
140 ret = killjob(*argv, numsig);
144 pidl = strtol(*argv, &ep, 10);
145 /* Check for overflow of pid_t. */
147 if (!**argv || *ep || pid != pidl)
148 errx(2, "illegal process id: %s", *argv);
149 ret = kill(pid, numsig);
161 signame_to_signum(const char *sig)
165 if (strncasecmp(sig, "SIG", 3) == 0)
167 for (n = 1; n < sys_nsig; n++) {
168 if (!strcasecmp(sys_signame[n], sig))
175 nosig(const char *name)
178 warnx("unknown signal %s; valid signals:", name);
179 printsignals(stderr);
188 printsignals(FILE *fp)
192 for (n = 1; n < sys_nsig; n++) {
193 (void)fprintf(fp, "%s", sys_signame[n]);
194 if (n == (sys_nsig / 2) || n == (sys_nsig - 1))
195 (void)fprintf(fp, "\n");
197 (void)fprintf(fp, " ");
205 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
206 "usage: kill [-s signal_name] pid ...",
207 " kill -l [exit_status]",
208 " kill -signal_name pid ...",
209 " kill -signal_number pid ...");