| 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 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved. |
| 34 | * @(#)kill.c 8.4 (Berkeley) 4/28/95 |
| 35 | * $FreeBSD: src/bin/kill/kill.c,v 1.11.2.2 2002/07/28 10:19:57 tjr Exp $ |
| 36 | * $DragonFly: src/bin/kill/kill.c,v 1.5 2004/11/07 20:54:51 eirikn Exp $ |
| 37 | */ |
| 38 | |
| 39 | #include <ctype.h> |
| 40 | #include <err.h> |
| 41 | #include <errno.h> |
| 42 | #include <signal.h> |
| 43 | #include <stdio.h> |
| 44 | #include <stdlib.h> |
| 45 | #include <string.h> |
| 46 | |
| 47 | static void nosig(const char *); |
| 48 | static void printsignals(FILE *); |
| 49 | static int signame_to_signum(const char *); |
| 50 | static void usage(void); |
| 51 | |
| 52 | int |
| 53 | main(int argc, char *argv[]) |
| 54 | { |
| 55 | int errors, numsig; |
| 56 | pid_t pid; |
| 57 | char *ep; |
| 58 | |
| 59 | if (argc < 2) |
| 60 | usage(); |
| 61 | |
| 62 | numsig = SIGTERM; |
| 63 | |
| 64 | argc--, argv++; |
| 65 | if (!strcmp(*argv, "-l")) { |
| 66 | argc--, argv++; |
| 67 | if (argc > 1) |
| 68 | usage(); |
| 69 | if (argc == 1) { |
| 70 | if (!isdigit(**argv)) |
| 71 | usage(); |
| 72 | numsig = strtol(*argv, &ep, 10); |
| 73 | if (!**argv || *ep) |
| 74 | errx(1, "illegal signal number: %s", *argv); |
| 75 | if (numsig >= 128) |
| 76 | numsig -= 128; |
| 77 | if (numsig <= 0 || numsig >= sys_nsig) |
| 78 | nosig(*argv); |
| 79 | printf("%s\n", sys_signame[numsig]); |
| 80 | exit(0); |
| 81 | } |
| 82 | printsignals(stdout); |
| 83 | exit(0); |
| 84 | } |
| 85 | |
| 86 | if (!strcmp(*argv, "-s")) { |
| 87 | argc--, argv++; |
| 88 | if (argc < 1) { |
| 89 | warnx("option requires an argument -- s"); |
| 90 | usage(); |
| 91 | } |
| 92 | if (strcmp(*argv, "0")) { |
| 93 | if ((numsig = signame_to_signum(*argv)) < 0) |
| 94 | nosig(*argv); |
| 95 | } else |
| 96 | numsig = 0; |
| 97 | argc--, argv++; |
| 98 | } else if (**argv == '-' && *(*argv + 1) != '-') { |
| 99 | ++*argv; |
| 100 | if (isalpha(**argv)) { |
| 101 | if ((numsig = signame_to_signum(*argv)) < 0) |
| 102 | nosig(*argv); |
| 103 | } else if (isdigit(**argv)) { |
| 104 | numsig = strtol(*argv, &ep, 10); |
| 105 | if (!**argv || *ep) |
| 106 | errx(1, "illegal signal number: %s", *argv); |
| 107 | if (numsig < 0 || numsig >= sys_nsig) |
| 108 | nosig(*argv); |
| 109 | } else |
| 110 | nosig(*argv); |
| 111 | argc--, argv++; |
| 112 | } |
| 113 | |
| 114 | if (argc > 0 && strncmp(*argv, "--", 2) == 0) |
| 115 | argc--, argv++; |
| 116 | |
| 117 | if (argc == 0) |
| 118 | usage(); |
| 119 | |
| 120 | for (errors = 0; argc; argc--, argv++) { |
| 121 | pid = (pid_t)strtol(*argv, &ep, 10); |
| 122 | if (!**argv || *ep) { |
| 123 | warnx("illegal process id: %s", *argv); |
| 124 | errors = 1; |
| 125 | } else if (kill(pid, numsig) == -1) { |
| 126 | warn("%s", *argv); |
| 127 | errors = 1; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | exit(errors); |
| 132 | } |
| 133 | |
| 134 | static int |
| 135 | signame_to_signum(const char *sig) |
| 136 | { |
| 137 | int n; |
| 138 | |
| 139 | if (!strncasecmp(sig, "sig", (size_t)3)) |
| 140 | sig += 3; |
| 141 | for (n = 1; n < sys_nsig; n++) { |
| 142 | if (!strcasecmp(sys_signame[n], sig)) |
| 143 | return (n); |
| 144 | } |
| 145 | return (-1); |
| 146 | } |
| 147 | |
| 148 | static void |
| 149 | nosig(const char *name) |
| 150 | { |
| 151 | |
| 152 | warnx("unknown signal %s; valid signals:", name); |
| 153 | printsignals(stderr); |
| 154 | exit(1); |
| 155 | } |
| 156 | |
| 157 | static void |
| 158 | printsignals(FILE *fp) |
| 159 | { |
| 160 | int n; |
| 161 | |
| 162 | for (n = 1; n < sys_nsig; n++) { |
| 163 | fprintf(fp, "%s", sys_signame[n]); |
| 164 | if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) |
| 165 | fprintf(fp, "\n"); |
| 166 | else |
| 167 | fprintf(fp, " "); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | static void |
| 172 | usage(void) |
| 173 | { |
| 174 | |
| 175 | fprintf(stderr, "%s\n%s\n%s\n%s\n", |
| 176 | "usage: kill [-s signal_name] pid ...", |
| 177 | " kill -l [exit_status]", |
| 178 | " kill -signal_name pid ...", |
| 179 | " kill -signal_number pid ..."); |
| 180 | exit(1); |
| 181 | } |