1 /* $NetBSD: kill.c,v 1.23 2003/08/07 09:05:13 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if !defined(lint) && !defined(SHELL) 34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95"; 41 #else 42 __RCSID("$NetBSD: kill.c,v 1.23 2003/08/07 09:05:13 agc Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <signal.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <termios.h> 54 #include <unistd.h> 55 #include <locale.h> 56 #include <sys/ioctl.h> 57 58 #ifdef SHELL /* sh (aka ash) builtin */ 59 #define main killcmd 60 #include "../../bin/sh/bltin/bltin.h" 61 #endif /* SHELL */ 62 63 static void nosig(char *); 64 static void printsignals(FILE *); 65 static int signame_to_signum(char *); 66 static void usage(void); 67 int main(int, char *[]); 68 69 int 70 main(int argc, char *argv[]) 71 { 72 int errors, numsig, pid; 73 char *ep; 74 75 setprogname(argv[0]); 76 setlocale(LC_ALL, ""); 77 if (argc < 2) 78 usage(); 79 80 numsig = SIGTERM; 81 82 argc--, argv++; 83 if (strcmp(*argv, "-l") == 0) { 84 argc--, argv++; 85 if (argc > 1) 86 usage(); 87 if (argc == 1) { 88 if (isdigit((unsigned char)**argv) == 0) 89 usage(); 90 numsig = strtol(*argv, &ep, 10); 91 if (*ep != '\0') { 92 errx(EXIT_FAILURE, "illegal signal number: %s", 93 *argv); 94 /* NOTREACHED */ 95 } 96 if (numsig >= 128) 97 numsig -= 128; 98 if (numsig <= 0 || numsig >= NSIG) 99 nosig(*argv); 100 printf("%s\n", sys_signame[numsig]); 101 exit(0); 102 } 103 printsignals(stdout); 104 exit(0); 105 } 106 107 if (!strcmp(*argv, "-s")) { 108 argc--, argv++; 109 if (argc < 1) { 110 warnx("option requires an argument -- s"); 111 usage(); 112 } 113 if (strcmp(*argv, "0")) { 114 if ((numsig = signame_to_signum(*argv)) < 0) 115 nosig(*argv); 116 } else 117 numsig = 0; 118 argc--, argv++; 119 } else if (**argv == '-') { 120 ++*argv; 121 if (isalpha((unsigned char)**argv)) { 122 if ((numsig = signame_to_signum(*argv)) < 0) 123 nosig(*argv); 124 } else if (isdigit((unsigned char)**argv)) { 125 numsig = strtol(*argv, &ep, 10); 126 if (!*argv || *ep) { 127 errx(EXIT_FAILURE, "illegal signal number: %s", 128 *argv); 129 /* NOTREACHED */ 130 } 131 if (numsig < 0 || numsig >= NSIG) 132 nosig(*argv); 133 } else 134 nosig(*argv); 135 argc--, argv++; 136 } 137 138 if (argc == 0) 139 usage(); 140 141 for (errors = 0; argc; argc--, argv++) { 142 #ifdef SHELL 143 extern int getjobpgrp(const char *); 144 if (*argv[0] == '%') { 145 pid = getjobpgrp(*argv); 146 if (pid == 0) { 147 warnx("illegal job id: %s", *argv); 148 errors = 1; 149 continue; 150 } 151 } else 152 #endif 153 { 154 pid = strtol(*argv, &ep, 10); 155 if (!**argv || *ep) { 156 warnx("illegal process id: %s", *argv); 157 errors = 1; 158 continue; 159 } 160 } 161 if (kill(pid, numsig) == -1) { 162 warn("%s", *argv); 163 errors = 1; 164 } 165 #ifdef SHELL 166 /* Wakeup the process if it was suspended, so it can 167 exit without an explicit 'fg'. */ 168 if (numsig == SIGTERM || numsig == SIGHUP) 169 kill(pid, SIGCONT); 170 #endif 171 } 172 173 exit(errors); 174 /* NOTREACHED */ 175 } 176 177 static int 178 signame_to_signum(char *sig) 179 { 180 int n; 181 182 if (strncasecmp(sig, "sig", 3) == 0) 183 sig += 3; 184 for (n = 1; n < NSIG; n++) { 185 if (!strcasecmp(sys_signame[n], sig)) 186 return (n); 187 } 188 return (-1); 189 } 190 191 static void 192 nosig(char *name) 193 { 194 195 warnx("unknown signal %s; valid signals:", name); 196 printsignals(stderr); 197 exit(1); 198 /* NOTREACHED */ 199 } 200 201 static void 202 printsignals(FILE *fp) 203 { 204 int sig; 205 int len, nl; 206 const char *name; 207 int termwidth = 80; 208 209 if (isatty(fileno(fp))) { 210 struct winsize win; 211 if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0) 212 termwidth = win.ws_col; 213 } 214 215 for (len = 0, sig = 1; sig < NSIG; sig++) { 216 name = sys_signame[sig]; 217 nl = 1 + strlen(name); 218 219 if (len + nl >= termwidth) { 220 fprintf(fp, "\n"); 221 len = 0; 222 } else 223 if (len != 0) 224 fprintf(fp, " "); 225 len += nl; 226 fprintf(fp, "%s", name); 227 } 228 if (len != 0) 229 fprintf(fp, "\n"); 230 } 231 232 static void 233 usage(void) 234 { 235 236 fprintf(stderr, "usage: %s [-s signal_name] pid ...\n" 237 " %s -l [exit_status]\n" 238 " %s -signal_name pid ...\n" 239 " %s -signal_number pid ...\n", 240 getprogname(), getprogname(), getprogname(), getprogname()); 241 exit(1); 242 /* NOTREACHED */ 243 } 244