kill.c revision 98158
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 44static const char rcsid[] = 45 "$FreeBSD: head/bin/kill/kill.c 98158 2002-06-13 08:07:20Z tjr $"; 46#endif /* not lint */ 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} 190