kill(1): Sync with FreeBSD
[dragonfly.git] / bin / kill / kill.c
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17745ede 1/*-
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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
17745ede 35 * $FreeBSD: src/bin/kill/kill.c,v 1.24 2011/02/04 16:40:50 jilles Exp $
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36 */
37
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38#include <ctype.h>
39#include <err.h>
99512ac4 40#include <errno.h>
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41#include <signal.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45
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46#ifdef SHELL
47#define main killcmd
48#include "bltin/bltin.h"
49#include "error.h"
50#endif
51
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52static void nosig(const char *);
53static void printsignals(FILE *);
54static int signame_to_signum(const char *);
55static void usage(void);
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56
57int
a7825f5c 58main(int argc, char **argv)
984263bc 59{
2848dd31 60 int errors, numsig;
07e80f3b 61 pid_t pid;
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62 char *ep;
63
64 if (argc < 2)
65 usage();
66
67 numsig = SIGTERM;
68
69 argc--, argv++;
a7825f5c 70 if (strcmp(*argv, "-l") == 0) {
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71 argc--, argv++;
72 if (argc > 1)
73 usage();
74 if (argc == 1) {
75 if (!isdigit(**argv))
76 usage();
77 numsig = strtol(*argv, &ep, 10);
a7825f5c 78 if (**argv == '\0' || *ep != '\0')
99512ac4 79 errx(2, "illegal signal number: %s", *argv);
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80 if (numsig >= 128)
81 numsig -= 128;
9f8c5148 82 if (numsig <= 0 || numsig >= sys_nsig)
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83 nosig(*argv);
84 printf("%s\n", sys_signame[numsig]);
99512ac4 85 return (0);
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86 }
87 printsignals(stdout);
99512ac4 88 return (0);
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89 }
90
a7825f5c 91 if (strcmp(*argv, "-s") == 0) {
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92 argc--, argv++;
93 if (argc < 1) {
94 warnx("option requires an argument -- s");
95 usage();
96 }
a7825f5c 97 if (strcmp(*argv, "0") != 0) {
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98 if ((numsig = signame_to_signum(*argv)) < 0)
99 nosig(*argv);
100 } else
101 numsig = 0;
102 argc--, argv++;
103 } else if (**argv == '-' && *(*argv + 1) != '-') {
104 ++*argv;
105 if (isalpha(**argv)) {
106 if ((numsig = signame_to_signum(*argv)) < 0)
107 nosig(*argv);
108 } else if (isdigit(**argv)) {
109 numsig = strtol(*argv, &ep, 10);
a7825f5c 110 if (**argv == '\0' || *ep != '\0')
99512ac4 111 errx(2, "illegal signal number: %s", *argv);
17745ede 112 if (numsig < 0)
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113 nosig(*argv);
114 } else
115 nosig(*argv);
116 argc--, argv++;
117 }
118
119 if (argc > 0 && strncmp(*argv, "--", 2) == 0)
120 argc--, argv++;
121
122 if (argc == 0)
123 usage();
124
125 for (errors = 0; argc; argc--, argv++) {
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126#ifdef SHELL
127 if (**argv == '%')
128 pid = getjobpgrp(*argv);
129 else
130#endif
131 {
132 pid = (pid_t)strtol(*argv, &ep, 10);
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133 if (**argv == '\0' || *ep != '\0')
134 errx(2, "illegal process id: %s", *argv);
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135 }
136 if (kill(pid, numsig) == -1) {
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137 warn("%s", *argv);
138 errors = 1;
139 }
140 }
141
99512ac4 142 return (errors);
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143}
144
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145static int
146signame_to_signum(const char *sig)
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147{
148 int n;
149
17745ede 150 if (strncasecmp(sig, "SIG", 3) == 0)
984263bc 151 sig += 3;
9f8c5148 152 for (n = 1; n < sys_nsig; n++) {
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153 if (strcasecmp(sys_signame[n], sig) == 0)
154 return(n);
984263bc 155 }
a7825f5c 156 return(-1);
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157}
158
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159static void
160nosig(const char *name)
984263bc 161{
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162 warnx("unknown signal %s; valid signals:", name);
163 printsignals(stderr);
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164#ifdef SHELL
165 error(NULL);
166#else
167 exit(2);
168#endif
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169}
170
2848dd31 171static void
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172printsignals(FILE *fp)
173{
174 int n;
175
9f8c5148 176 for (n = 1; n < sys_nsig; n++) {
2848dd31 177 fprintf(fp, "%s", sys_signame[n]);
9f8c5148 178 if (n == (sys_nsig / 2) || n == (sys_nsig - 1))
57fed2af 179 fprintf(fp, "\n");
984263bc 180 else
57fed2af 181 fprintf(fp, " ");
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182 }
183}
184
2848dd31 185static void
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186usage(void)
187{
57fed2af 188 fprintf(stderr, "%s\n%s\n%s\n%s\n",
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189 "usage: kill [-s signal_name] pid ...",
190 " kill -l [exit_status]",
191 " kill -signal_name pid ...",
192 " kill -signal_number pid ...");
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193#ifdef SHELL
194 error(NULL);
195#else
196 exit(2);
197#endif
984263bc 198}