* static functions
[dragonfly.git] / bin / kill / kill.c
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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.
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32 *
33 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)kill.c 8.4 (Berkeley) 4/28/95
35 * $FreeBSD: src/bin/kill/kill.c,v 1.11.2.2 2002/07/28 10:19:57 tjr Exp $
9f8c5148 36 * $DragonFly: src/bin/kill/kill.c,v 1.3 2003/10/22 00:51:15 dillon Exp $
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37 */
38
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39#include <ctype.h>
40#include <err.h>
41#include <errno.h>
42#include <signal.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46
47void nosig(char *);
48void printsignals(FILE *);
49int signame_to_signum(char *);
50void usage(void);
51
52int
53main(int argc, char *argv[])
54{
55 int errors, numsig, pid;
56 char *ep;
57
58 if (argc < 2)
59 usage();
60
61 numsig = SIGTERM;
62
63 argc--, argv++;
64 if (!strcmp(*argv, "-l")) {
65 argc--, argv++;
66 if (argc > 1)
67 usage();
68 if (argc == 1) {
69 if (!isdigit(**argv))
70 usage();
71 numsig = strtol(*argv, &ep, 10);
72 if (!**argv || *ep)
73 errx(1, "illegal signal number: %s", *argv);
74 if (numsig >= 128)
75 numsig -= 128;
9f8c5148 76 if (numsig <= 0 || numsig >= sys_nsig)
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77 nosig(*argv);
78 printf("%s\n", sys_signame[numsig]);
79 exit(0);
80 }
81 printsignals(stdout);
82 exit(0);
83 }
84
85 if (!strcmp(*argv, "-s")) {
86 argc--, argv++;
87 if (argc < 1) {
88 warnx("option requires an argument -- s");
89 usage();
90 }
91 if (strcmp(*argv, "0")) {
92 if ((numsig = signame_to_signum(*argv)) < 0)
93 nosig(*argv);
94 } else
95 numsig = 0;
96 argc--, argv++;
97 } else if (**argv == '-' && *(*argv + 1) != '-') {
98 ++*argv;
99 if (isalpha(**argv)) {
100 if ((numsig = signame_to_signum(*argv)) < 0)
101 nosig(*argv);
102 } else if (isdigit(**argv)) {
103 numsig = strtol(*argv, &ep, 10);
104 if (!**argv || *ep)
105 errx(1, "illegal signal number: %s", *argv);
9f8c5148 106 if (numsig < 0 || numsig >= sys_nsig)
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107 nosig(*argv);
108 } else
109 nosig(*argv);
110 argc--, argv++;
111 }
112
113 if (argc > 0 && strncmp(*argv, "--", 2) == 0)
114 argc--, argv++;
115
116 if (argc == 0)
117 usage();
118
119 for (errors = 0; argc; argc--, argv++) {
120 pid = strtol(*argv, &ep, 10);
121 if (!**argv || *ep) {
122 warnx("illegal process id: %s", *argv);
123 errors = 1;
124 } else if (kill(pid, numsig) == -1) {
125 warn("%s", *argv);
126 errors = 1;
127 }
128 }
129
130 exit(errors);
131}
132
133int
134signame_to_signum(char *sig)
135{
136 int n;
137
138 if (!strncasecmp(sig, "sig", (size_t)3))
139 sig += 3;
9f8c5148 140 for (n = 1; n < sys_nsig; n++) {
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141 if (!strcasecmp(sys_signame[n], sig))
142 return (n);
143 }
144 return (-1);
145}
146
147void
148nosig(char *name)
149{
150
151 warnx("unknown signal %s; valid signals:", name);
152 printsignals(stderr);
153 exit(1);
154}
155
156void
157printsignals(FILE *fp)
158{
159 int n;
160
9f8c5148 161 for (n = 1; n < sys_nsig; n++) {
984263bc 162 (void)fprintf(fp, "%s", sys_signame[n]);
9f8c5148 163 if (n == (sys_nsig / 2) || n == (sys_nsig - 1))
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164 (void)fprintf(fp, "\n");
165 else
166 (void)fprintf(fp, " ");
167 }
168}
169
170void
171usage(void)
172{
173
174 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
175 "usage: kill [-s signal_name] pid ...",
176 " kill -l [exit_status]",
177 " kill -signal_name pid ...",
178 " kill -signal_number pid ...");
179 exit(1);
180}