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 1.6 2004/11/11 21:16:46 cpressey Exp $ 37 */ 38 39 #include <ctype.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 static void nosig(const char *); 48 static void printsignals(FILE *); 49 static int signame_to_signum(const char *); 50 static void usage(void); 51 52 int 53 main(int argc, char **argv) 54 { 55 int errors, numsig; 56 pid_t pid; 57 char *ep; 58 59 if (argc < 2) 60 usage(); 61 62 numsig = SIGTERM; 63 64 argc--, argv++; 65 if (strcmp(*argv, "-l") == 0) { 66 argc--, argv++; 67 if (argc > 1) 68 usage(); 69 if (argc == 1) { 70 if (!isdigit(**argv)) 71 usage(); 72 numsig = strtol(*argv, &ep, 10); 73 if (**argv == '\0' || *ep != '\0') 74 errx(1, "illegal signal number: %s", *argv); 75 if (numsig >= 128) 76 numsig -= 128; 77 if (numsig <= 0 || numsig >= sys_nsig) 78 nosig(*argv); 79 printf("%s\n", sys_signame[numsig]); 80 exit(0); 81 } 82 printsignals(stdout); 83 exit(0); 84 } 85 86 if (strcmp(*argv, "-s") == 0) { 87 argc--, argv++; 88 if (argc < 1) { 89 warnx("option requires an argument -- s"); 90 usage(); 91 } 92 if (strcmp(*argv, "0") != 0) { 93 if ((numsig = signame_to_signum(*argv)) < 0) 94 nosig(*argv); 95 } else 96 numsig = 0; 97 argc--, argv++; 98 } else if (**argv == '-' && *(*argv + 1) != '-') { 99 ++*argv; 100 if (isalpha(**argv)) { 101 if ((numsig = signame_to_signum(*argv)) < 0) 102 nosig(*argv); 103 } else if (isdigit(**argv)) { 104 numsig = strtol(*argv, &ep, 10); 105 if (**argv == '\0' || *ep != '\0') 106 errx(1, "illegal signal number: %s", *argv); 107 if (numsig < 0 || numsig >= sys_nsig) 108 nosig(*argv); 109 } else 110 nosig(*argv); 111 argc--, argv++; 112 } 113 114 if (argc > 0 && strncmp(*argv, "--", 2) == 0) 115 argc--, argv++; 116 117 if (argc == 0) 118 usage(); 119 120 for (errors = 0; argc; argc--, argv++) { 121 pid = (pid_t)strtol(*argv, &ep, 10); 122 if (!**argv || *ep) { 123 warnx("illegal process id: %s", *argv); 124 errors = 1; 125 } else if (kill(pid, numsig) == -1) { 126 warn("%s", *argv); 127 errors = 1; 128 } 129 } 130 131 exit(errors); 132 } 133 134 static int 135 signame_to_signum(const char *sig) 136 { 137 int n; 138 139 if (strncasecmp(sig, "sig", (size_t)3) == 0) 140 sig += 3; 141 for (n = 1; n < sys_nsig; n++) { 142 if (strcasecmp(sys_signame[n], sig) == 0) 143 return(n); 144 } 145 return(-1); 146 } 147 148 static void 149 nosig(const char *name) 150 { 151 warnx("unknown signal %s; valid signals:", name); 152 printsignals(stderr); 153 exit(1); 154 } 155 156 static void 157 printsignals(FILE *fp) 158 { 159 int n; 160 161 for (n = 1; n < sys_nsig; n++) { 162 fprintf(fp, "%s", sys_signame[n]); 163 if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) 164 fprintf(fp, "\n"); 165 else 166 fprintf(fp, " "); 167 } 168 } 169 170 static void 171 usage(void) 172 { 173 fprintf(stderr, "%s\n%s\n%s\n%s\n", 174 "usage: kill [-s signal_name] pid ...", 175 " kill -l [exit_status]", 176 " kill -signal_name pid ...", 177 " kill -signal_number pid ..."); 178 exit(1); 179 } 180