kill.c revision 76876 
1/*
2 * Copyright (c) 1988, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char const copyright[] =
36"@(#) Copyright (c) 1988, 1993, 1994\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)kill.c	8.4 (Berkeley) 4/28/95";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/bin/kill/kill.c 76876 2001-05-20 04:52:37Z kris $";
46#endif /* not lint */
47
48#include <ctype.h>
49#include <err.h>
50#include <errno.h>
51#include <signal.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55
56int main __P((int, char *[]));
57void nosig __P((char *));
58void printsignals __P((FILE *));
59int signame_to_signum __P((char *));
60void usage __P((void));
61
62int
63main(argc, argv)
64	int argc;
65	char *argv[];
66{
67	int errors, numsig, pid;
68	char *ep;
69
70	if (argc < 2)
71		usage();
72
73	numsig = SIGTERM;
74
75	argc--, argv++;
76	if (!strcmp(*argv, "-l")) {
77		argc--, argv++;
78		if (argc > 1)
79			usage();
80		if (argc == 1) {
81			if (!isdigit(**argv))
82				usage();
83			numsig = strtol(*argv, &ep, 10);
84			if (!**argv || *ep)
85				errx(1, "illegal signal number: %s", *argv);
86			if (numsig >= 128)
87				numsig -= 128;
88			if (numsig <= 0 || numsig >= NSIG)
89				nosig(*argv);
90			printf("%s\n", sys_signame[numsig]);
91			exit(0);
92		}
93		printsignals(stdout);
94		exit(0);
95	}
96
97	if (!strcmp(*argv, "-s")) {
98		argc--, argv++;
99		if (argc < 1) {
100			warnx("option requires an argument -- s");
101			usage();
102		}
103		if (strcmp(*argv, "0")) {
104			if ((numsig = signame_to_signum(*argv)) < 0)
105				nosig(*argv);
106		} else
107			numsig = 0;
108		argc--, argv++;
109	} else if (**argv == '-') {
110		++*argv;
111		if (isalpha(**argv)) {
112			if ((numsig = signame_to_signum(*argv)) < 0)
113				nosig(*argv);
114		} else if (isdigit(**argv)) {
115			numsig = strtol(*argv, &ep, 10);
116			if (!**argv || *ep)
117				errx(1, "illegal signal number: %s", *argv);
118			if (numsig < 0 || numsig >= NSIG)
119				nosig(*argv);
120		} else
121			nosig(*argv);
122		argc--, argv++;
123	}
124
125	if (argc == 0)
126		usage();
127
128	for (errors = 0; argc; argc--, argv++) {
129		pid = strtol(*argv, &ep, 10);
130		if (!**argv || *ep) {
131			warnx("illegal process id: %s", *argv);
132			errors = 1;
133		} else if (kill(pid, numsig) == -1) {
134			warn("%s", *argv);
135			errors = 1;
136		}
137	}
138
139	exit(errors);
140}
141
142int
143signame_to_signum(sig)
144	char *sig;
145{
146	int n;
147
148	if (!strncasecmp(sig, "sig", (size_t)3))
149		sig += 3;
150	for (n = 1; n < NSIG; n++) {
151		if (!strcasecmp(sys_signame[n], sig))
152			return (n);
153	}
154	return (-1);
155}
156
157void
158nosig(name)
159	char *name;
160{
161
162	warnx("unknown signal %s; valid signals:", name);
163	printsignals(stderr);
164	exit(1);
165}
166
167void
168printsignals(fp)
169	FILE *fp;
170{
171	int n;
172
173	for (n = 1; n < NSIG; n++) {
174		(void)fprintf(fp, "%s", sys_signame[n]);
175		if (n == (NSIG / 2) || n == (NSIG - 1))
176			(void)fprintf(fp, "\n");
177		else
178			(void)fprintf(fp, " ");
179	}
180}
181
182void
183usage()
184{
185
186	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
187		"usage: kill [-s signal_name] pid ...",
188		"       kill -l [exit_status]",
189		"       kill -signal_name pid ...",
190		"       kill -signal_number pid ...");
191	exit(1);
192}
193