source: trunk/src/ash/bltin/kill.c@ 626

Last change on this file since 626 was 626, checked in by bird, 19 years ago

Current libc code (based on NetBSD sh 2005-07-03).

  • Property svn:eol-style set to native
File size: 5.8 KB
Line 
1/* $NetBSD: kill.c,v 1.23 2003/08/07 09:05:13 agc Exp $ */
2
3/*
4 * Copyright (c) 1988, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if !defined(lint) && !defined(SHELL)
34__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\
35 The Regents of the University of California. All rights reserved.\n");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95";
41#else
42__RCSID("$NetBSD: kill.c,v 1.23 2003/08/07 09:05:13 agc Exp $");
43#endif
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#include <termios.h>
54#include <unistd.h>
55#include <locale.h>
56#include <sys/ioctl.h>
57
58#ifdef SHELL /* sh (aka ash) builtin */
59#define main killcmd
60#include "bltin/bltin.h"
61#endif /* SHELL */
62
63static void nosig(char *);
64static void printsignals(FILE *);
65static int signame_to_signum(char *);
66static void usage(void);
67int main(int, char *[]);
68
69int
70main(int argc, char *argv[])
71{
72 int errors, numsig, pid;
73 char *ep;
74
75 setprogname(argv[0]);
76 setlocale(LC_ALL, "");
77 if (argc < 2)
78 usage();
79
80 numsig = SIGTERM;
81
82 argc--, argv++;
83 if (strcmp(*argv, "-l") == 0) {
84 argc--, argv++;
85 if (argc > 1)
86 usage();
87 if (argc == 1) {
88 if (isdigit((unsigned char)**argv) == 0)
89 usage();
90 numsig = strtol(*argv, &ep, 10);
91 if (*ep != '\0') {
92 errx(EXIT_FAILURE, "illegal signal number: %s",
93 *argv);
94 /* NOTREACHED */
95 }
96 if (numsig >= 128)
97 numsig -= 128;
98 if (numsig <= 0 || numsig >= NSIG)
99 nosig(*argv);
100 printf("%s\n", sys_signame[numsig]);
101 exit(0);
102 }
103 printsignals(stdout);
104 exit(0);
105 }
106
107 if (!strcmp(*argv, "-s")) {
108 argc--, argv++;
109 if (argc < 1) {
110 warnx("option requires an argument -- s");
111 usage();
112 }
113 if (strcmp(*argv, "0")) {
114 if ((numsig = signame_to_signum(*argv)) < 0)
115 nosig(*argv);
116 } else
117 numsig = 0;
118 argc--, argv++;
119 } else if (**argv == '-') {
120 ++*argv;
121 if (isalpha((unsigned char)**argv)) {
122 if ((numsig = signame_to_signum(*argv)) < 0)
123 nosig(*argv);
124 } else if (isdigit((unsigned char)**argv)) {
125 numsig = strtol(*argv, &ep, 10);
126 if (!*argv || *ep) {
127 errx(EXIT_FAILURE, "illegal signal number: %s",
128 *argv);
129 /* NOTREACHED */
130 }
131 if (numsig < 0 || numsig >= NSIG)
132 nosig(*argv);
133 } else
134 nosig(*argv);
135 argc--, argv++;
136 }
137
138 if (argc == 0)
139 usage();
140
141 for (errors = 0; argc; argc--, argv++) {
142#ifdef SHELL
143 extern int getjobpgrp(const char *);
144 if (*argv[0] == '%') {
145 pid = getjobpgrp(*argv);
146 if (pid == 0) {
147 warnx("illegal job id: %s", *argv);
148 errors = 1;
149 continue;
150 }
151 } else
152#endif
153 {
154 pid = strtol(*argv, &ep, 10);
155 if (!**argv || *ep) {
156 warnx("illegal process id: %s", *argv);
157 errors = 1;
158 continue;
159 }
160 }
161 if (kill(pid, numsig) == -1) {
162 warn("%s", *argv);
163 errors = 1;
164 }
165#ifdef SHELL
166 /* Wakeup the process if it was suspended, so it can
167 exit without an explicit 'fg'. */
168 if (numsig == SIGTERM || numsig == SIGHUP)
169 kill(pid, SIGCONT);
170#endif
171 }
172
173 exit(errors);
174 /* NOTREACHED */
175}
176
177static int
178signame_to_signum(char *sig)
179{
180 int n;
181
182 if (strncasecmp(sig, "sig", 3) == 0)
183 sig += 3;
184 for (n = 1; n < NSIG; n++) {
185 if (!strcasecmp(sys_signame[n], sig))
186 return (n);
187 }
188 return (-1);
189}
190
191static void
192nosig(char *name)
193{
194
195 warnx("unknown signal %s; valid signals:", name);
196 printsignals(stderr);
197 exit(1);
198 /* NOTREACHED */
199}
200
201static void
202printsignals(FILE *fp)
203{
204 int sig;
205 int len, nl;
206 const char *name;
207 int termwidth = 80;
208
209#ifdef TIOCGWINSZ
210 if (isatty(fileno(fp))) {
211 struct winsize win;
212 if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0)
213 termwidth = win.ws_col;
214 }
215#else
216#warning TIOCGWINSZ is not present.
217#endif
218
219 for (len = 0, sig = 1; sig < NSIG; sig++) {
220 name = sys_signame[sig];
221 nl = 1 + strlen(name);
222
223 if (len + nl >= termwidth) {
224 fprintf(fp, "\n");
225 len = 0;
226 } else
227 if (len != 0)
228 fprintf(fp, " ");
229 len += nl;
230 fprintf(fp, "%s", name);
231 }
232 if (len != 0)
233 fprintf(fp, "\n");
234}
235
236static void
237usage(void)
238{
239
240 fprintf(stderr, "usage: %s [-s signal_name] pid ...\n"
241 " %s -l [exit_status]\n"
242 " %s -signal_name pid ...\n"
243 " %s -signal_number pid ...\n",
244 getprogname(), getprogname(), getprogname(), getprogname());
245 exit(1);
246 /* NOTREACHED */
247}
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