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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)kill.c 8.4 (Berkeley) 4/28/95 31 * $FreeBSD: src/bin/kill/kill.c,v 1.24 2011/02/04 16:40:50 jilles Exp $ 32 */ 33 34 #include <ctype.h> 35 #include <err.h> 36 #include <errno.h> 37 #include <signal.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #ifdef SHELL 43 #define main killcmd 44 #include "bltin/bltin.h" 45 #include "error.h" 46 #endif 47 48 static void nosig(const char *); 49 static void printsignals(FILE *); 50 static int signame_to_signum(const char *); 51 static void usage(void); 52 53 int 54 main(int argc, char **argv) 55 { 56 int errors, numsig; 57 pid_t pid; 58 char *ep; 59 60 if (argc < 2) 61 usage(); 62 63 numsig = SIGTERM; 64 65 argc--, argv++; 66 if (strcmp(*argv, "-l") == 0) { 67 argc--, argv++; 68 if (argc > 1) 69 usage(); 70 if (argc == 1) { 71 if (!isdigit(**argv)) 72 usage(); 73 numsig = strtol(*argv, &ep, 10); 74 if (**argv == '\0' || *ep != '\0') 75 errx(2, "illegal signal number: %s", *argv); 76 if (numsig >= 128) 77 numsig -= 128; 78 if (numsig <= 0 || numsig >= sys_nsig) 79 nosig(*argv); 80 printf("%s\n", sys_signame[numsig]); 81 return (0); 82 } 83 printsignals(stdout); 84 return (0); 85 } 86 87 if (strcmp(*argv, "-s") == 0) { 88 argc--, argv++; 89 if (argc < 1) { 90 warnx("option requires an argument -- s"); 91 usage(); 92 } 93 if (strcmp(*argv, "0") != 0) { 94 if ((numsig = signame_to_signum(*argv)) < 0) 95 nosig(*argv); 96 } else 97 numsig = 0; 98 argc--, argv++; 99 } else if (**argv == '-' && *(*argv + 1) != '-') { 100 ++*argv; 101 if (isalpha(**argv)) { 102 if ((numsig = signame_to_signum(*argv)) < 0) 103 nosig(*argv); 104 } else if (isdigit(**argv)) { 105 numsig = strtol(*argv, &ep, 10); 106 if (**argv == '\0' || *ep != '\0') 107 errx(2, "illegal signal number: %s", *argv); 108 if (numsig < 0) 109 nosig(*argv); 110 } else 111 nosig(*argv); 112 argc--, argv++; 113 } 114 115 if (argc > 0 && strncmp(*argv, "--", 2) == 0) 116 argc--, argv++; 117 118 if (argc == 0) 119 usage(); 120 121 for (errors = 0; argc; argc--, argv++) { 122 #ifdef SHELL 123 if (**argv == '%') 124 pid = killjob(*argv, numsig); 125 else 126 #endif 127 { 128 pid = (pid_t)strtol(*argv, &ep, 10); 129 if (**argv == '\0' || *ep != '\0') 130 errx(2, "illegal process id: %s", *argv); 131 } 132 if (kill(pid, numsig) == -1) { 133 warn("%s", *argv); 134 errors = 1; 135 } 136 } 137 138 return (errors); 139 } 140 141 static int 142 signame_to_signum(const char *sig) 143 { 144 int n; 145 146 if (strncasecmp(sig, "SIG", 3) == 0) 147 sig += 3; 148 for (n = 1; n < sys_nsig; n++) { 149 if (strcasecmp(sys_signame[n], sig) == 0) 150 return(n); 151 } 152 return(-1); 153 } 154 155 static void 156 nosig(const char *name) 157 { 158 warnx("unknown signal %s; valid signals:", name); 159 printsignals(stderr); 160 #ifdef SHELL 161 error(NULL); 162 #else 163 exit(2); 164 #endif 165 } 166 167 static void 168 printsignals(FILE *fp) 169 { 170 int n; 171 172 for (n = 1; n < sys_nsig; n++) { 173 fprintf(fp, "%s", sys_signame[n]); 174 if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) 175 fprintf(fp, "\n"); 176 else 177 fprintf(fp, " "); 178 } 179 } 180 181 static void 182 usage(void) 183 { 184 fprintf(stderr, "%s\n%s\n%s\n%s\n", 185 "usage: kill [-s signal_name] pid ...", 186 " kill -l [exit_status]", 187 " kill -signal_name pid ...", 188 " kill -signal_number pid ..."); 189 #ifdef SHELL 190 error(NULL); 191 #else 192 exit(2); 193 #endif 194 } 195