1 /* $NetBSD: kill.c,v 1.21 2002/11/25 14:23:07 christos 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if !defined(lint) && !defined(SHELL) 38 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95"; 45 #else 46 __RCSID("$NetBSD: kill.c,v 1.21 2002/11/25 14:23:07 christos Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <signal.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <termios.h> 58 #include <unistd.h> 59 #include <locale.h> 60 #include <sys/ioctl.h> 61 62 #ifdef SHELL /* sh (aka ash) builtin */ 63 #define main killcmd 64 #include "../../bin/sh/bltin/bltin.h" 65 #endif /* SHELL */ 66 67 static void nosig(char *); 68 static void printsignals(FILE *); 69 static int signame_to_signum(char *); 70 static void usage(void); 71 int main(int, char *[]); 72 73 int 74 main(int argc, char *argv[]) 75 { 76 int errors, numsig, pid; 77 char *ep; 78 79 setprogname(argv[0]); 80 setlocale(LC_ALL, ""); 81 if (argc < 2) 82 usage(); 83 84 numsig = SIGTERM; 85 86 argc--, argv++; 87 if (strcmp(*argv, "-l") == 0) { 88 argc--, argv++; 89 if (argc > 1) 90 usage(); 91 if (argc == 1) { 92 if (isdigit((unsigned char)**argv) == 0) 93 usage(); 94 numsig = strtol(*argv, &ep, 10); 95 if (*ep != '\0') 96 errx(1, "illegal signal number: %s", *argv); 97 if (numsig >= 128) 98 numsig -= 128; 99 if (numsig <= 0 || numsig >= NSIG) 100 nosig(*argv); 101 printf("%s\n", sys_signame[numsig]); 102 exit(0); 103 } 104 printsignals(stdout); 105 exit(0); 106 } 107 108 if (!strcmp(*argv, "-s")) { 109 argc--, argv++; 110 if (argc < 1) { 111 warnx("option requires an argument -- s"); 112 usage(); 113 } 114 if (strcmp(*argv, "0")) { 115 if ((numsig = signame_to_signum(*argv)) < 0) 116 nosig(*argv); 117 } else 118 numsig = 0; 119 argc--, argv++; 120 } else if (**argv == '-') { 121 ++*argv; 122 if (isalpha((unsigned char)**argv)) { 123 if ((numsig = signame_to_signum(*argv)) < 0) 124 nosig(*argv); 125 } else if (isdigit((unsigned char)**argv)) { 126 numsig = strtol(*argv, &ep, 10); 127 if (!*argv || *ep) 128 errx(1, "illegal signal number: %s", *argv); 129 if (numsig < 0 || numsig >= NSIG) 130 nosig(*argv); 131 } else 132 nosig(*argv); 133 argc--, argv++; 134 } 135 136 if (argc == 0) 137 usage(); 138 139 for (errors = 0; argc; argc--, argv++) { 140 #ifdef SHELL 141 extern int getjobpgrp(const char *); 142 if (*argv[0] == '%') { 143 pid = getjobpgrp(*argv); 144 if (pid == 0) { 145 warnx("illegal job id: %s", *argv); 146 errors = 1; 147 continue; 148 } 149 } else 150 #endif 151 { 152 pid = strtol(*argv, &ep, 10); 153 if (!**argv || *ep) { 154 warnx("illegal process id: %s", *argv); 155 errors = 1; 156 continue; 157 } 158 } 159 if (kill(pid, numsig) == -1) { 160 warn("%s", *argv); 161 errors = 1; 162 } 163 #ifdef SHELL 164 /* Wakeup the process if it was suspended, so it can 165 exit without an explicit 'fg'. */ 166 if (numsig == SIGTERM || numsig == SIGHUP) 167 kill(pid, SIGCONT); 168 #endif 169 } 170 171 exit(errors); 172 /* NOTREACHED */ 173 } 174 175 static int 176 signame_to_signum(char *sig) 177 { 178 int n; 179 180 if (strncasecmp(sig, "sig", 3) == 0) 181 sig += 3; 182 for (n = 1; n < NSIG; n++) { 183 if (!strcasecmp(sys_signame[n], sig)) 184 return (n); 185 } 186 return (-1); 187 } 188 189 static void 190 nosig(char *name) 191 { 192 193 warnx("unknown signal %s; valid signals:", name); 194 printsignals(stderr); 195 exit(1); 196 /* NOTREACHED */ 197 } 198 199 static void 200 printsignals(FILE *fp) 201 { 202 int sig; 203 int len, nl; 204 const char *name; 205 int termwidth = 80; 206 207 if (isatty(fileno(fp))) { 208 struct winsize win; 209 if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0) 210 termwidth = win.ws_col; 211 } 212 213 for (len = 0, sig = 1; sig < NSIG; sig++) { 214 name = sys_signame[sig]; 215 nl = 1 + strlen(name); 216 217 if (len + nl >= termwidth) { 218 fprintf(fp, "\n"); 219 len = 0; 220 } else 221 if (len != 0) 222 fprintf(fp, " "); 223 len += nl; 224 fprintf(fp, "%s", name); 225 } 226 if (len != 0) 227 fprintf(fp, "\n"); 228 } 229 230 static void 231 usage(void) 232 { 233 234 fprintf(stderr, "usage: %s [-s signal_name] pid ...\n" 235 " %s -l [exit_status]\n" 236 " %s -signal_name pid ...\n" 237 " %s -signal_number pid ...\n", 238 getprogname(), getprogname(), getprogname(), getprogname()); 239 exit(1); 240 /* NOTREACHED */ 241 } 242