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 * @(#) 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 $ 36 * $DragonFly: src/bin/kill/kill.c,v 1.7 2005/03/05 19:41:38 liamfoy Exp $ 37 */ 38 39 #include <ctype.h> 40 #include <err.h> 41 #include <signal.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 static void nosig(const char *); 47 static void printsignals(FILE *); 48 static int signame_to_signum(const char *); 49 static void usage(void); 50 51 int 52 main(int argc, char **argv) 53 { 54 int errors, numsig; 55 pid_t pid; 56 char *ep; 57 58 if (argc < 2) 59 usage(); 60 61 numsig = SIGTERM; 62 63 argc--, argv++; 64 if (strcmp(*argv, "-l") == 0) { 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 == '\0' || *ep != '\0') 73 errx(1, "illegal signal number: %s", *argv); 74 if (numsig >= 128) 75 numsig -= 128; 76 if (numsig <= 0 || numsig >= sys_nsig) 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") == 0) { 86 argc--, argv++; 87 if (argc < 1) { 88 warnx("option requires an argument -- s"); 89 usage(); 90 } 91 if (strcmp(*argv, "0") != 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 == '\0' || *ep != '\0') 105 errx(1, "illegal signal number: %s", *argv); 106 if (numsig < 0 || numsig >= sys_nsig) 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 = (pid_t)strtol(*argv, &ep, 10); 121 if (**argv == '\0' || *ep != '\0') { 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 } 132 133 static int 134 signame_to_signum(const char *sig) 135 { 136 int n; 137 138 if (strncasecmp(sig, "sig", 3) == 0) 139 sig += 3; 140 for (n = 1; n < sys_nsig; n++) { 141 if (strcasecmp(sys_signame[n], sig) == 0) 142 return(n); 143 } 144 return(-1); 145 } 146 147 static void 148 nosig(const char *name) 149 { 150 warnx("unknown signal %s; valid signals:", name); 151 printsignals(stderr); 152 exit(1); 153 } 154 155 static void 156 printsignals(FILE *fp) 157 { 158 int n; 159 160 for (n = 1; n < sys_nsig; n++) { 161 fprintf(fp, "%s", sys_signame[n]); 162 if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) 163 fprintf(fp, "\n"); 164 else 165 fprintf(fp, " "); 166 } 167 } 168 169 static void 170 usage(void) 171 { 172 fprintf(stderr, "%s\n%s\n%s\n%s\n", 173 "usage: kill [-s signal_name] pid ...", 174 " kill -l [exit_status]", 175 " kill -signal_name pid ...", 176 " kill -signal_number pid ..."); 177 exit(1); 178 } 179