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 1.24 2011/02/04 16:40:50 jilles Exp $ 36 */ 37 38 #include <ctype.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <signal.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #ifdef SHELL 47 #define main killcmd 48 #include "bltin/bltin.h" 49 #include "error.h" 50 #endif 51 52 static void nosig(const char *); 53 static void printsignals(FILE *); 54 static int signame_to_signum(const char *); 55 static void usage(void); 56 57 int 58 main(int argc, char **argv) 59 { 60 int errors, numsig; 61 pid_t pid; 62 char *ep; 63 64 if (argc < 2) 65 usage(); 66 67 numsig = SIGTERM; 68 69 argc--, argv++; 70 if (strcmp(*argv, "-l") == 0) { 71 argc--, argv++; 72 if (argc > 1) 73 usage(); 74 if (argc == 1) { 75 if (!isdigit(**argv)) 76 usage(); 77 numsig = strtol(*argv, &ep, 10); 78 if (**argv == '\0' || *ep != '\0') 79 errx(2, "illegal signal number: %s", *argv); 80 if (numsig >= 128) 81 numsig -= 128; 82 if (numsig <= 0 || numsig >= sys_nsig) 83 nosig(*argv); 84 printf("%s\n", sys_signame[numsig]); 85 return (0); 86 } 87 printsignals(stdout); 88 return (0); 89 } 90 91 if (strcmp(*argv, "-s") == 0) { 92 argc--, argv++; 93 if (argc < 1) { 94 warnx("option requires an argument -- s"); 95 usage(); 96 } 97 if (strcmp(*argv, "0") != 0) { 98 if ((numsig = signame_to_signum(*argv)) < 0) 99 nosig(*argv); 100 } else 101 numsig = 0; 102 argc--, argv++; 103 } else if (**argv == '-' && *(*argv + 1) != '-') { 104 ++*argv; 105 if (isalpha(**argv)) { 106 if ((numsig = signame_to_signum(*argv)) < 0) 107 nosig(*argv); 108 } else if (isdigit(**argv)) { 109 numsig = strtol(*argv, &ep, 10); 110 if (**argv == '\0' || *ep != '\0') 111 errx(2, "illegal signal number: %s", *argv); 112 if (numsig < 0) 113 nosig(*argv); 114 } else 115 nosig(*argv); 116 argc--, argv++; 117 } 118 119 if (argc > 0 && strncmp(*argv, "--", 2) == 0) 120 argc--, argv++; 121 122 if (argc == 0) 123 usage(); 124 125 for (errors = 0; argc; argc--, argv++) { 126 #ifdef SHELL 127 if (**argv == '%') 128 pid = getjobpgrp(*argv); 129 else 130 #endif 131 { 132 pid = (pid_t)strtol(*argv, &ep, 10); 133 if (**argv == '\0' || *ep != '\0') 134 errx(2, "illegal process id: %s", *argv); 135 } 136 if (kill(pid, numsig) == -1) { 137 warn("%s", *argv); 138 errors = 1; 139 } 140 } 141 142 return (errors); 143 } 144 145 static int 146 signame_to_signum(const char *sig) 147 { 148 int n; 149 150 if (strncasecmp(sig, "SIG", 3) == 0) 151 sig += 3; 152 for (n = 1; n < sys_nsig; n++) { 153 if (strcasecmp(sys_signame[n], sig) == 0) 154 return(n); 155 } 156 return(-1); 157 } 158 159 static void 160 nosig(const char *name) 161 { 162 warnx("unknown signal %s; valid signals:", name); 163 printsignals(stderr); 164 #ifdef SHELL 165 error(NULL); 166 #else 167 exit(2); 168 #endif 169 } 170 171 static void 172 printsignals(FILE *fp) 173 { 174 int n; 175 176 for (n = 1; n < sys_nsig; n++) { 177 fprintf(fp, "%s", sys_signame[n]); 178 if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) 179 fprintf(fp, "\n"); 180 else 181 fprintf(fp, " "); 182 } 183 } 184 185 static void 186 usage(void) 187 { 188 fprintf(stderr, "%s\n%s\n%s\n%s\n", 189 "usage: kill [-s signal_name] pid ...", 190 " kill -l [exit_status]", 191 " kill -signal_name pid ...", 192 " kill -signal_number pid ..."); 193 #ifdef SHELL 194 error(NULL); 195 #else 196 exit(2); 197 #endif 198 } 199