1 /* $NetBSD: kill.c,v 1.27 2011/08/29 14:51:18 joerg 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\ 35 The Regents of the University of California. All rights reserved."); 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 1.27 2011/08/29 14:51:18 joerg 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 <limits.h> 53 #include <inttypes.h> 54 #include <string.h> 55 #include <termios.h> 56 #include <unistd.h> 57 #include <locale.h> 58 #include <sys/ioctl.h> 59 60 #ifdef SHELL /* sh (aka ash) builtin */ 61 int killcmd(int, char *argv[]); 62 #define main killcmd 63 #include "../../bin/sh/bltin/bltin.h" 64 #endif /* SHELL */ 65 66 __dead static void nosig(char *); 67 static void printsignals(FILE *); 68 static int signame_to_signum(char *); 69 __dead static void usage(void); 70 71 int 72 main(int argc, char *argv[]) 73 { 74 int errors; 75 intmax_t numsig, pid; 76 char *ep; 77 78 setprogname(argv[0]); 79 setlocale(LC_ALL, ""); 80 if (argc < 2) 81 usage(); 82 83 numsig = SIGTERM; 84 85 argc--, argv++; 86 if (strcmp(*argv, "-l") == 0) { 87 argc--, argv++; 88 if (argc > 1) 89 usage(); 90 if (argc == 1) { 91 if (isdigit((unsigned char)**argv) == 0) 92 usage(); 93 numsig = strtoimax(*argv, &ep, 10); 94 /* check for correctly parsed number */ 95 if (*ep != '\0' || numsig == INTMAX_MIN || numsig == INTMAX_MAX) { 96 errx(EXIT_FAILURE, "illegal signal number: %s", 97 *argv); 98 /* NOTREACHED */ 99 } 100 if (numsig >= 128) 101 numsig -= 128; 102 /* and whether it fits into signals range */ 103 if (numsig <= 0 || numsig >= NSIG) 104 nosig(*argv); 105 printf("%s\n", sys_signame[(int) numsig]); 106 exit(0); 107 } 108 printsignals(stdout); 109 exit(0); 110 } 111 112 if (!strcmp(*argv, "-s")) { 113 argc--, argv++; 114 if (argc < 1) { 115 warnx("option requires an argument -- s"); 116 usage(); 117 } 118 if (strcmp(*argv, "0")) { 119 if ((numsig = signame_to_signum(*argv)) < 0) 120 nosig(*argv); 121 } else 122 numsig = 0; 123 argc--, argv++; 124 } else if (**argv == '-') { 125 char *sn = *argv + 1; 126 if (isalpha((unsigned char)*sn)) { 127 if ((numsig = signame_to_signum(sn)) < 0) 128 nosig(sn); 129 } else if (isdigit((unsigned char)*sn)) { 130 numsig = strtoimax(sn, &ep, 10); 131 /* check for correctly parsed number */ 132 if (*ep || numsig == INTMAX_MIN || numsig == INTMAX_MAX ) { 133 errx(EXIT_FAILURE, "illegal signal number: %s", 134 sn); 135 /* NOTREACHED */ 136 } 137 /* and whether it fits into signals range */ 138 if (numsig < 0 || numsig >= NSIG) 139 nosig(sn); 140 } else 141 nosig(sn); 142 argc--, argv++; 143 } 144 145 if (argc == 0) 146 usage(); 147 148 for (errors = 0; argc; argc--, argv++) { 149 #ifdef SHELL 150 extern int getjobpgrp(const char *); 151 if (*argv[0] == '%') { 152 pid = getjobpgrp(*argv); 153 if (pid == 0) { 154 warnx("illegal job id: %s", *argv); 155 errors = 1; 156 continue; 157 } 158 } else 159 #endif 160 { 161 pid = strtoimax(*argv, &ep, 10); 162 /* make sure the pid is a number and fits into pid_t */ 163 if (!**argv || *ep || pid == INTMAX_MIN || 164 pid == INTMAX_MAX || pid != (pid_t) pid) { 165 166 warnx("illegal process id: %s", *argv); 167 errors = 1; 168 continue; 169 } 170 } 171 if (kill((pid_t) pid, (int) numsig) == -1) { 172 warn("%s", *argv); 173 errors = 1; 174 } 175 #ifdef SHELL 176 /* Wakeup the process if it was suspended, so it can 177 exit without an explicit 'fg'. */ 178 if (numsig == SIGTERM || numsig == SIGHUP) 179 kill((pid_t) pid, SIGCONT); 180 #endif 181 } 182 183 exit(errors); 184 /* NOTREACHED */ 185 } 186 187 static int 188 signame_to_signum(char *sig) 189 { 190 int n; 191 192 if (strncasecmp(sig, "sig", 3) == 0) 193 sig += 3; 194 for (n = 1; n < NSIG; n++) { 195 if (!strcasecmp(sys_signame[n], sig)) 196 return (n); 197 } 198 return (-1); 199 } 200 201 static void 202 nosig(char *name) 203 { 204 205 warnx("unknown signal %s; valid signals:", name); 206 printsignals(stderr); 207 exit(1); 208 /* NOTREACHED */ 209 } 210 211 static void 212 printsignals(FILE *fp) 213 { 214 int sig; 215 int len, nl; 216 const char *name; 217 int termwidth = 80; 218 219 if (isatty(fileno(fp))) { 220 struct winsize win; 221 if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0) 222 termwidth = win.ws_col; 223 } 224 225 for (len = 0, sig = 1; sig < NSIG; sig++) { 226 name = sys_signame[sig]; 227 nl = 1 + strlen(name); 228 229 if (len + nl >= termwidth) { 230 fprintf(fp, "\n"); 231 len = 0; 232 } else 233 if (len != 0) 234 fprintf(fp, " "); 235 len += nl; 236 fprintf(fp, "%s", name); 237 } 238 if (len != 0) 239 fprintf(fp, "\n"); 240 } 241 242 static void 243 usage(void) 244 { 245 246 fprintf(stderr, "usage: %s [-s signal_name] pid ...\n" 247 " %s -l [exit_status]\n" 248 " %s -signal_name pid ...\n" 249 " %s -signal_number pid ...\n", 250 getprogname(), getprogname(), getprogname(), getprogname()); 251 exit(1); 252 /* NOTREACHED */ 253 } 254
