kill.c revision 1557 
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 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
41static char sccsid[] = "@(#)kill.c	8.3 (Berkeley) 4/2/94";
42#endif /* not lint */
43
44#include <ctype.h>
45#include <err.h>
46#include <errno.h>
47#include <signal.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51
52void nosig __P((char *));
53void printsig __P((FILE *));
54void usage __P((void));
55
56int
57main(argc, argv)
58	int argc;
59	char *argv[];
60{
61	const char *const *p;
62	int errors, numsig, pid;
63	char *ep;
64
65	if (argc < 2)
66		usage();
67
68	if (!strcmp(*++argv, "-l")) {
69		printsig(stdout);
70		exit(0);
71	}
72
73	numsig = SIGTERM;
74	if (**argv == '-') {
75		++*argv;
76		if (isalpha(**argv)) {
77			if (!strncasecmp(*argv, "sig", 3))
78				*argv += 3;
79			for (numsig = NSIG, p = sys_signame + 1; --numsig; ++p)
80				if (!strcasecmp(*p, *argv)) {
81					numsig = p - sys_signame;
82					break;
83				}
84			if (!numsig)
85				nosig(*argv);
86		} else if (isdigit(**argv)) {
87			numsig = strtol(*argv, &ep, 10);
88			if (!*argv || *ep)
89				errx(1, "illegal signal number: %s", *argv);
90			if (numsig <= 0 || numsig > NSIG)
91				nosig(*argv);
92		} else
93			nosig(*argv);
94		++argv;
95	}
96
97	if (!*argv)
98		usage();
99
100	for (errors = 0; *argv; ++argv) {
101		pid = strtol(*argv, &ep, 10);
102		if (!*argv || *ep) {
103			warnx("illegal process id: %s", *argv);
104			errors = 1;
105		} else if (kill(pid, numsig) == -1) {
106			warn("%s", *argv);
107			errors = 1;
108		}
109	}
110	exit(errors);
111}
112
113void
114nosig(name)
115	char *name;
116{
117
118	warnx("unknown signal %s; valid signals:", name);
119	printsig(stderr);
120	exit(1);
121}
122
123void
124printsig(fp)
125	FILE *fp;
126{
127	const char *const *p;
128	int cnt;
129
130	for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) {
131		(void)fprintf(fp, "%s ", *p);
132		if (cnt == NSIG / 2)
133			(void)fprintf(fp, "\n");
134	}
135	(void)fprintf(fp, "\n");
136}
137
138void
139usage()
140{
141
142	(void)fprintf(stderr, "usage: kill [-l] [-sig] pid ...\n");
143	exit(1);
144}
145