| 1 | /* $NetBSD: kill.c,v 1.23 2003/08/07 09:05:13 agc Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Copyright (c) 1988, 1993, 1994
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * 3. Neither the name of the University nor the names of its contributors
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| 16 | * may be used to endorse or promote products derived from this software
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| 17 | * without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 29 | * SUCH DAMAGE.
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| 30 | */
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| 31 |
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| 32 | #ifdef HAVE_SYS_CDEFS_H
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| 33 | #include <sys/cdefs.h>
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| 34 | #endif
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| 35 | #if !defined(lint) && !defined(SHELL)
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| 36 | __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\
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| 37 | The Regents of the University of California. All rights reserved.\n");
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| 38 | #endif /* not lint */
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| 39 |
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| 40 | #ifndef lint
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| 41 | #if 0
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| 42 | static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95";
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| 43 | #else
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| 44 | __RCSID("$NetBSD: kill.c,v 1.23 2003/08/07 09:05:13 agc Exp $");
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| 45 | #endif
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| 46 | #endif /* not lint */
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| 47 |
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| 48 | #include <ctype.h>
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| 49 | #ifndef __sun__
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| 50 | #include <err.h>
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| 51 | #endif
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| 52 | #include <errno.h>
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| 53 | #include <signal.h>
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| 54 | #include <stdio.h>
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| 55 | #include <stdlib.h>
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| 56 | #include <string.h>
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| 57 | #include <termios.h>
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| 58 | #include <unistd.h>
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| 59 | #include <locale.h>
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| 60 | #include <sys/ioctl.h>
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| 61 |
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| 62 | #ifndef HAVE_SYS_SIGNAME
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| 63 | extern void init_sys_signame(void);
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| 64 | extern char sys_signame[NSIG][16];
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| 65 | #endif
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| 66 |
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| 67 | #ifdef SHELL /* sh (aka ash) builtin */
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| 68 | #define main killcmd
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| 69 | #include "bltin/bltin.h"
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| 70 | #endif /* SHELL */
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| 71 |
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| 72 | static void nosig(char *);
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| 73 | static void printsignals(FILE *);
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| 74 | static int signame_to_signum(char *);
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| 75 | static void usage(void);
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| 76 | int main(int, char *[]);
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| 77 |
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| 78 | int
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| 79 | main(int argc, char *argv[])
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| 80 | {
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| 81 | int errors, numsig, pid;
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| 82 | char *ep;
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| 83 |
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| 84 | setprogname(argv[0]);
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| 85 | setlocale(LC_ALL, "");
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| 86 | if (argc < 2)
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| 87 | usage();
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| 88 |
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| 89 | numsig = SIGTERM;
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| 90 |
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| 91 | argc--, argv++;
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| 92 | if (strcmp(*argv, "-l") == 0) {
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| 93 | argc--, argv++;
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| 94 | if (argc > 1)
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| 95 | usage();
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| 96 | if (argc == 1) {
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| 97 | if (isdigit((unsigned char)**argv) == 0)
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| 98 | usage();
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| 99 | numsig = strtol(*argv, &ep, 10);
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| 100 | if (*ep != '\0') {
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| 101 | errx(EXIT_FAILURE, "illegal signal number: %s",
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| 102 | *argv);
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| 103 | /* NOTREACHED */
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| 104 | }
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| 105 | if (numsig >= 128)
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| 106 | numsig -= 128;
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| 107 | if (numsig <= 0 || numsig >= NSIG)
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| 108 | nosig(*argv);
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| 109 | #ifndef HAVE_SYS_SIGNAME
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| 110 | init_sys_signame();
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| 111 | #endif
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| 112 | printf("%s\n", sys_signame[numsig]);
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| 113 | exit(0);
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| 114 | }
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| 115 | printsignals(stdout);
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| 116 | exit(0);
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| 117 | }
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| 118 |
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| 119 | if (!strcmp(*argv, "-s")) {
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| 120 | argc--, argv++;
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| 121 | if (argc < 1) {
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| 122 | warnx("option requires an argument -- s");
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| 123 | usage();
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| 124 | }
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| 125 | if (strcmp(*argv, "0")) {
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| 126 | if ((numsig = signame_to_signum(*argv)) < 0)
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| 127 | nosig(*argv);
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| 128 | } else
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| 129 | numsig = 0;
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| 130 | argc--, argv++;
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| 131 | } else if (**argv == '-') {
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| 132 | ++*argv;
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| 133 | if (isalpha((unsigned char)**argv)) {
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| 134 | if ((numsig = signame_to_signum(*argv)) < 0)
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| 135 | nosig(*argv);
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| 136 | } else if (isdigit((unsigned char)**argv)) {
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| 137 | numsig = strtol(*argv, &ep, 10);
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| 138 | if (!*argv || *ep) {
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| 139 | errx(EXIT_FAILURE, "illegal signal number: %s",
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| 140 | *argv);
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| 141 | /* NOTREACHED */
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| 142 | }
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| 143 | if (numsig < 0 || numsig >= NSIG)
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| 144 | nosig(*argv);
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| 145 | } else
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| 146 | nosig(*argv);
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| 147 | argc--, argv++;
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| 148 | }
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| 149 |
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| 150 | if (argc == 0)
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| 151 | usage();
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| 152 |
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| 153 | for (errors = 0; argc; argc--, argv++) {
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| 154 | #ifdef SHELL
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| 155 | extern int getjobpgrp(const char *);
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| 156 | if (*argv[0] == '%') {
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| 157 | pid = getjobpgrp(*argv);
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| 158 | if (pid == 0) {
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| 159 | warnx("illegal job id: %s", *argv);
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| 160 | errors = 1;
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| 161 | continue;
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| 162 | }
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| 163 | } else
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| 164 | #endif
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| 165 | {
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| 166 | pid = strtol(*argv, &ep, 10);
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| 167 | if (!**argv || *ep) {
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| 168 | warnx("illegal process id: %s", *argv);
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| 169 | errors = 1;
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| 170 | continue;
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| 171 | }
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| 172 | }
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| 173 | if (kill(pid, numsig) == -1) {
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| 174 | warn("%s", *argv);
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| 175 | errors = 1;
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| 176 | }
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| 177 | #ifdef SHELL
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| 178 | /* Wakeup the process if it was suspended, so it can
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| 179 | exit without an explicit 'fg'. */
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| 180 | if (numsig == SIGTERM || numsig == SIGHUP)
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| 181 | kill(pid, SIGCONT);
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| 182 | #endif
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| 183 | }
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| 184 |
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| 185 | exit(errors);
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| 186 | /* NOTREACHED */
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| 187 | }
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| 188 |
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| 189 | static int
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| 190 | signame_to_signum(char *sig)
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| 191 | {
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| 192 | int n;
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| 193 | #ifndef HAVE_SYS_SIGNAME
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| 194 | init_sys_signame();
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| 195 | #endif
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| 196 | if (strncasecmp(sig, "sig", 3) == 0)
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| 197 | sig += 3;
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| 198 | for (n = 1; n < NSIG; n++) {
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| 199 | if (!strcasecmp(sys_signame[n], sig))
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| 200 | return (n);
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| 201 | }
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| 202 | return (-1);
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| 203 | }
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| 204 |
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| 205 | static void
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| 206 | nosig(char *name)
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| 207 | {
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| 208 |
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| 209 | warnx("unknown signal %s; valid signals:", name);
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| 210 | printsignals(stderr);
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| 211 | exit(1);
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| 212 | /* NOTREACHED */
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| 213 | }
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| 214 |
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| 215 | static void
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| 216 | printsignals(FILE *fp)
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| 217 | {
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| 218 | int sig;
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| 219 | int len, nl;
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| 220 | const char *name;
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| 221 | int termwidth = 80;
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| 222 |
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| 223 | #ifdef TIOCGWINSZ
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| 224 | if (isatty(fileno(fp))) {
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| 225 | struct winsize win;
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| 226 | if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0)
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| 227 | termwidth = win.ws_col;
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| 228 | }
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| 229 | #else
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| 230 | #ifndef _MSC_VER
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| 231 | #warning TIOCGWINSZ is not present.
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| 232 | #endif
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| 233 | #endif
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| 234 | #ifndef HAVE_SYS_SIGNAME
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| 235 | init_sys_signame();
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| 236 | #endif
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| 237 |
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| 238 | for (len = 0, sig = 1; sig < NSIG; sig++) {
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| 239 | name = sys_signame[sig];
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| 240 | nl = 1 + strlen(name);
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| 241 |
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| 242 | if (len + nl >= termwidth) {
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| 243 | fprintf(fp, "\n");
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| 244 | len = 0;
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| 245 | } else
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| 246 | if (len != 0)
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| 247 | fprintf(fp, " ");
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| 248 | len += nl;
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| 249 | fprintf(fp, "%s", name);
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| 250 | }
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| 251 | if (len != 0)
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| 252 | fprintf(fp, "\n");
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| 253 | }
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| 254 |
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| 255 | static void
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| 256 | usage(void)
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| 257 | {
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| 258 |
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| 259 | fprintf(stderr, "usage: %s [-s signal_name] pid ...\n"
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| 260 | " %s -l [exit_status]\n"
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| 261 | " %s -signal_name pid ...\n"
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| 262 | " %s -signal_number pid ...\n",
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| 263 | getprogname(), getprogname(), getprogname(), getprogname());
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| 264 | exit(1);
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| 265 | /* NOTREACHED */
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| 266 | }
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