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
31 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved.
32 * @(#)kill.c 8.4 (Berkeley) 4/28/95
33 * $FreeBSD: src/bin/kill/kill.c,v 1.24 2011/02/04 16:40:50 jilles Exp $
36 * Important: This file is used both as a standalone program /bin/kill and
37 * as a builtin for /bin/sh (#define SHELL).
50 #include "bltin/bltin.h"
53 static void nosig(const char *);
54 static void printsignals(FILE *);
55 static int signame_to_signum(const char *);
56 static void usage(void);
59 main(int argc
, char **argv
)
63 int errors
, numsig
, ret
;
72 if (strcmp(*argv
, "-l") == 0) {
79 numsig
= strtol(*argv
, &ep
, 10);
80 if (**argv
== '\0' || *ep
!= '\0')
81 errx(2, "illegal signal number: %s", *argv
);
84 if (numsig
<= 0 || numsig
>= sys_nsig
)
86 printf("%s\n", sys_signame
[numsig
]);
93 if (strcmp(*argv
, "-s") == 0) {
96 warnx("option requires an argument -- s");
99 if (strcmp(*argv
, "0") != 0) {
100 if ((numsig
= signame_to_signum(*argv
)) < 0)
105 } else if (**argv
== '-' && *(*argv
+ 1) != '-') {
107 if (isalpha(**argv
)) {
108 if ((numsig
= signame_to_signum(*argv
)) < 0)
110 } else if (isdigit(**argv
)) {
111 numsig
= strtol(*argv
, &ep
, 10);
112 if (**argv
== '\0' || *ep
!= '\0')
113 errx(2, "illegal signal number: %s", *argv
);
121 if (argc
> 0 && strncmp(*argv
, "--", 2) == 0)
127 for (errors
= 0; argc
; argc
--, argv
++) {
130 ret
= killjob(*argv
, numsig
);
134 pidl
= strtol(*argv
, &ep
, 10);
135 /* Check for overflow of pid_t. */
137 if (!**argv
|| *ep
|| pid
!= pidl
)
138 errx(2, "illegal process id: %s", *argv
);
139 ret
= kill(pid
, numsig
);
151 signame_to_signum(const char *sig
)
155 if (strncasecmp(sig
, "SIG", 3) == 0)
157 for (n
= 1; n
< sys_nsig
; n
++) {
158 if (strcasecmp(sys_signame
[n
], sig
) == 0)
165 nosig(const char *name
)
167 warnx("unknown signal %s; valid signals:", name
);
168 printsignals(stderr
);
177 printsignals(FILE *fp
)
181 for (n
= 1; n
< sys_nsig
; n
++) {
182 fprintf(fp
, "%s", sys_signame
[n
]);
183 if (n
== (sys_nsig
/ 2) || n
== (sys_nsig
- 1))
193 fprintf(stderr
, "%s\n%s\n%s\n%s\n",
194 "usage: kill [-s signal_name] pid ...",
195 " kill -l [exit_status]",
196 " kill -signal_name pid ...",
197 " kill -signal_number pid ...");