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 * 4. 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 /* 30 * Important: This file is used both as a standalone program /bin/kill and 31 * as a builtin for /bin/sh (#define SHELL). 32 */ 33 34 #if 0 35 #ifndef lint 36 static char const copyright[] = 37 "@(#) Copyright (c) 1988, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95"; 43 #endif /* not lint */ 44 #endif 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 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 56 #ifdef SHELL 57 #define main killcmd 58 #include "bltin/bltin.h" 59 #include "error.h" 60 #endif 61 62 static void nosig(const char *); 63 static void printsignals(FILE *); 64 static int signame_to_signum(const char *); 65 static void usage(void); 66 67 int 68 main(int argc, char *argv[]) 69 { 70 int errors, numsig, pid; 71 char *ep; 72 73 if (argc < 2) 74 usage(); 75 76 numsig = SIGTERM; 77 78 argc--, argv++; 79 if (!strcmp(*argv, "-l")) { 80 argc--, argv++; 81 if (argc > 1) 82 usage(); 83 if (argc == 1) { 84 if (!isdigit(**argv)) 85 usage(); 86 numsig = strtol(*argv, &ep, 10); 87 if (!**argv || *ep) 88 errx(2, "illegal signal number: %s", *argv); 89 if (numsig >= 128) 90 numsig -= 128; 91 if (numsig <= 0 || numsig >= sys_nsig) 92 nosig(*argv); 93 printf("%s\n", sys_signame[numsig]); 94 return (0); 95 } 96 printsignals(stdout); 97 return (0); 98 } 99 100 if (!strcmp(*argv, "-s")) { 101 argc--, argv++; 102 if (argc < 1) { 103 warnx("option requires an argument -- s"); 104 usage(); 105 } 106 if (strcmp(*argv, "0")) { 107 if ((numsig = signame_to_signum(*argv)) < 0) 108 nosig(*argv); 109 } else 110 numsig = 0; 111 argc--, argv++; 112 } else if (**argv == '-' && *(*argv + 1) != '-') { 113 ++*argv; 114 if (isalpha(**argv)) { 115 if ((numsig = signame_to_signum(*argv)) < 0) 116 nosig(*argv); 117 } else if (isdigit(**argv)) { 118 numsig = strtol(*argv, &ep, 10); 119 if (!**argv || *ep) 120 errx(2, "illegal signal number: %s", *argv); 121 if (numsig < 0) 122 nosig(*argv); 123 } else 124 nosig(*argv); 125 argc--, argv++; 126 } 127 128 if (argc > 0 && strncmp(*argv, "--", 2) == 0) 129 argc--, argv++; 130 131 if (argc == 0) 132 usage(); 133 134 for (errors = 0; argc; argc--, argv++) { 135 #ifdef SHELL 136 if (**argv == '%') 137 pid = getjobpgrp(*argv); 138 else 139 #endif 140 { 141 pid = strtol(*argv, &ep, 10); 142 if (!**argv || *ep) 143 errx(2, "illegal process id: %s", *argv); 144 } 145 if (kill(pid, numsig) == -1) { 146 warn("%s", *argv); 147 errors = 1; 148 } 149 } 150 151 return (errors); 152 } 153 154 static int 155 signame_to_signum(const char *sig) 156 { 157 int n; 158 159 if (strncasecmp(sig, "SIG", 3) == 0) 160 sig += 3; 161 for (n = 1; n < sys_nsig; n++) { 162 if (!strcasecmp(sys_signame[n], sig)) 163 return (n); 164 } 165 return (-1); 166 } 167 168 static void 169 nosig(const char *name) 170 { 171 172 warnx("unknown signal %s; valid signals:", name); 173 printsignals(stderr); 174 #ifdef SHELL 175 error(NULL); 176 #else 177 exit(2); 178 #endif 179 } 180 181 static void 182 printsignals(FILE *fp) 183 { 184 int n; 185 186 for (n = 1; n < sys_nsig; n++) { 187 (void)fprintf(fp, "%s", sys_signame[n]); 188 if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) 189 (void)fprintf(fp, "\n"); 190 else 191 (void)fprintf(fp, " "); 192 } 193 } 194 195 static void 196 usage(void) 197 { 198 199 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 200 "usage: kill [-s signal_name] pid ...", 201 " kill -l [exit_status]", 202 " kill -signal_name pid ...", 203 " kill -signal_number pid ..."); 204 #ifdef SHELL 205 error(NULL); 206 #else 207 exit(2); 208 #endif 209 } 210