kill.c revision 3044 
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 *	$Id$
34 */
35
36#ifndef lint
37static char copyright[] =
38"@(#) Copyright (c) 1988, 1993, 1994\n\
39	The Regents of the University of California.  All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static char sccsid[] = "@(#)kill.c	8.3 (Berkeley) 4/2/94";
44#endif /* not lint */
45
46#include <ctype.h>
47#include <err.h>
48#include <errno.h>
49#include <signal.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <string.h>
53
54void nosig __P((char *));
55void printsig __P((FILE *));
56void usage __P((void));
57
58int
59main(argc, argv)
60	int argc;
61	char *argv[];
62{
63	const char *const *p;
64	int errors, numsig, pid;
65	char *ep;
66
67	if (argc < 2)
68		usage();
69
70	if (!strcmp(*++argv, "-l")) {
71		printsig(stdout);
72		exit(0);
73	}
74
75	numsig = SIGTERM;
76	if (**argv == '-') {
77		++*argv;
78		if (isalpha(**argv)) {
79			if (!strncasecmp(*argv, "sig", 3))
80				*argv += 3;
81			for (numsig = NSIG, p = sys_signame + 1; --numsig; ++p)
82				if (!strcasecmp(*p, *argv)) {
83					numsig = p - sys_signame;
84					break;
85				}
86			if (!numsig)
87				nosig(*argv);
88		} else if (isdigit(**argv)) {
89			numsig = strtol(*argv, &ep, 10);
90			if (!*argv || *ep)
91				errx(1, "illegal signal number: %s", *argv);
92			if (numsig <= 0 || numsig > NSIG)
93				nosig(*argv);
94		} else
95			nosig(*argv);
96		++argv;
97	}
98
99	if (!*argv)
100		usage();
101
102	for (errors = 0; *argv; ++argv) {
103		pid = strtol(*argv, &ep, 10);
104		if (!*argv || *ep) {
105			warnx("illegal process id: %s", *argv);
106			errors = 1;
107		} else if (kill(pid, numsig) == -1) {
108			warn("%s", *argv);
109			errors = 1;
110		}
111	}
112	exit(errors);
113}
114
115void
116nosig(name)
117	char *name;
118{
119
120	warnx("unknown signal %s; valid signals:", name);
121	printsig(stderr);
122	exit(1);
123}
124
125void
126printsig(fp)
127	FILE *fp;
128{
129	const char *const *p;
130	int cnt;
131
132	for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) {
133		(void)fprintf(fp, "%s ", *p);
134		if (cnt == NSIG / 2)
135			(void)fprintf(fp, "\n");
136	}
137	(void)fprintf(fp, "\n");
138}
139
140void
141usage()
142{
143
144	(void)fprintf(stderr, "usage: kill [-l] [-sig] pid ...\n");
145	exit(1);
146}
147