Initial import from FreeBSD RELENG_4:
[dragonfly.git] / bin / kill / kill.c
CommitLineData
984263bc
MD
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
44#endif /* not lint */
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: src/bin/kill/kill.c,v 1.11.2.2 2002/07/28 10:19:57 tjr Exp $");
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
56void nosig(char *);
57void printsignals(FILE *);
58int signame_to_signum(char *);
59void usage(void);
60
61int
62main(int argc, char *argv[])
63{
64 int errors, numsig, pid;
65 char *ep;
66
67 if (argc < 2)
68 usage();
69
70 numsig = SIGTERM;
71
72 argc--, argv++;
73 if (!strcmp(*argv, "-l")) {
74 argc--, argv++;
75 if (argc > 1)
76 usage();
77 if (argc == 1) {
78 if (!isdigit(**argv))
79 usage();
80 numsig = strtol(*argv, &ep, 10);
81 if (!**argv || *ep)
82 errx(1, "illegal signal number: %s", *argv);
83 if (numsig >= 128)
84 numsig -= 128;
85 if (numsig <= 0 || numsig >= NSIG)
86 nosig(*argv);
87 printf("%s\n", sys_signame[numsig]);
88 exit(0);
89 }
90 printsignals(stdout);
91 exit(0);
92 }
93
94 if (!strcmp(*argv, "-s")) {
95 argc--, argv++;
96 if (argc < 1) {
97 warnx("option requires an argument -- s");
98 usage();
99 }
100 if (strcmp(*argv, "0")) {
101 if ((numsig = signame_to_signum(*argv)) < 0)
102 nosig(*argv);
103 } else
104 numsig = 0;
105 argc--, argv++;
106 } else if (**argv == '-' && *(*argv + 1) != '-') {
107 ++*argv;
108 if (isalpha(**argv)) {
109 if ((numsig = signame_to_signum(*argv)) < 0)
110 nosig(*argv);
111 } else if (isdigit(**argv)) {
112 numsig = strtol(*argv, &ep, 10);
113 if (!**argv || *ep)
114 errx(1, "illegal signal number: %s", *argv);
115 if (numsig < 0 || numsig >= NSIG)
116 nosig(*argv);
117 } else
118 nosig(*argv);
119 argc--, argv++;
120 }
121
122 if (argc > 0 && strncmp(*argv, "--", 2) == 0)
123 argc--, argv++;
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(char *sig)
144{
145 int n;
146
147 if (!strncasecmp(sig, "sig", (size_t)3))
148 sig += 3;
149 for (n = 1; n < NSIG; n++) {
150 if (!strcasecmp(sys_signame[n], sig))
151 return (n);
152 }
153 return (-1);
154}
155
156void
157nosig(char *name)
158{
159
160 warnx("unknown signal %s; valid signals:", name);
161 printsignals(stderr);
162 exit(1);
163}
164
165void
166printsignals(FILE *fp)
167{
168 int n;
169
170 for (n = 1; n < NSIG; n++) {
171 (void)fprintf(fp, "%s", sys_signame[n]);
172 if (n == (NSIG / 2) || n == (NSIG - 1))
173 (void)fprintf(fp, "\n");
174 else
175 (void)fprintf(fp, " ");
176 }
177}
178
179void
180usage(void)
181{
182
183 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
184 "usage: kill [-s signal_name] pid ...",
185 " kill -l [exit_status]",
186 " kill -signal_name pid ...",
187 " kill -signal_number pid ...");
188 exit(1);
189}