1 /* $OpenBSD: kill.c,v 1.12 2014/03/23 12:44:00 millert Exp $ */ 2 /* $NetBSD: kill.c,v 1.11 1995/09/07 06:30:27 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <ctype.h> 34 #include <err.h> 35 #include <errno.h> 36 #include <signal.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 41 extern char *__progname; 42 43 void nosig(char *); 44 void printsignals(FILE *); 45 int signame_to_signum(char *); 46 void usage(void); 47 48 int 49 main(int argc, char *argv[]) 50 { 51 int errors, numsig, pid; 52 char *ep; 53 54 if (argc < 2) 55 usage(); 56 57 numsig = SIGTERM; 58 59 argc--, argv++; 60 if (!strcmp(*argv, "-l")) { 61 argc--, argv++; 62 if (argc > 0 && !strcmp(*argv, "--")) 63 argc--, argv++; 64 if (argc > 1) 65 usage(); 66 if (argc == 1) { 67 if (!isdigit((unsigned char)**argv)) 68 usage(); 69 numsig = strtol(*argv, &ep, 10); 70 if (*ep) 71 errx(1, "illegal signal number: %s", *argv); 72 if (numsig >= 128) 73 numsig -= 128; 74 if (numsig <= 0 || numsig >= NSIG) 75 nosig(*argv); 76 printf("%s\n", sys_signame[numsig]); 77 exit(0); 78 } 79 printsignals(stdout); 80 exit(0); 81 } 82 83 if (!strcmp(*argv, "-s")) { 84 argc--, argv++; 85 if (argc > 0 && !strcmp(*argv, "--")) 86 argc--, argv++; 87 if (argc < 1) { 88 warnx("option requires an argument -- s"); 89 usage(); 90 } 91 if (strcmp(*argv, "0")) { 92 if ((numsig = signame_to_signum(*argv)) < 0) 93 nosig(*argv); 94 } else 95 numsig = 0; 96 argc--, argv++; 97 } else if (**argv == '-') { 98 if (strcmp(*argv, "--")) { 99 ++*argv; 100 if (isalpha((unsigned char)**argv)) { 101 if ((numsig = signame_to_signum(*argv)) < 0) 102 nosig(*argv); 103 } else if (isdigit((unsigned char)**argv)) { 104 numsig = strtol(*argv, &ep, 10); 105 if (*ep) 106 errx(1, "illegal signal number: %s", *argv); 107 if (numsig < 0 || numsig >= NSIG) 108 nosig(*argv); 109 } else 110 nosig(*argv); 111 } 112 argc--, argv++; 113 } 114 115 if (argc == 0) 116 usage(); 117 118 for (errors = 0; argc; argc--, argv++) { 119 pid = strtol(*argv, &ep, 10); 120 if (!**argv || *ep) { 121 warnx("illegal process id: %s", *argv); 122 errors = 1; 123 } else if (kill(pid, numsig) == -1) { 124 warn("%s", *argv); 125 errors = 1; 126 } 127 } 128 129 exit(errors); 130 } 131 132 int 133 signame_to_signum(char *sig) 134 { 135 int n; 136 137 if (!strncasecmp(sig, "sig", 3)) 138 sig += 3; 139 for (n = 1; n < NSIG; n++) { 140 if (!strcasecmp(sys_signame[n], sig)) 141 return (n); 142 } 143 return (-1); 144 } 145 146 void 147 nosig(char *name) 148 { 149 150 warnx("unknown signal %s; valid signals:", name); 151 printsignals(stderr); 152 exit(1); 153 } 154 155 void 156 printsignals(FILE *fp) 157 { 158 int n; 159 160 for (n = 1; n < NSIG; n++) { 161 (void)fprintf(fp, "%s", sys_signame[n]); 162 if (n == (NSIG / 2) || n == (NSIG - 1)) 163 (void)fprintf(fp, "\n"); 164 else 165 (void)fprintf(fp, " "); 166 } 167 } 168 169 void 170 usage(void) 171 { 172 (void)fprintf(stderr, "usage: %s [-s signal_name] pid ...\n", 173 __progname); 174 (void)fprintf(stderr, " %s -l [exit_status]\n", __progname); 175 (void)fprintf(stderr, " %s -signal_name pid ...\n", 176 __progname); 177 (void)fprintf(stderr, " %s -signal_number pid ...\n", 178 __progname); 179 exit(1); 180 } 181