kill/kill.c

   1 /*      $NetBSD: kill.c,v 1.16 1998/07/28 11:41:49 mycroft 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 #ifndef lint
  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 1.16 1998/07/28 11:41:49 mycroft 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
  58 void nosig __P((char *));
  59 void printsignals __P((FILE *));
  60 int signame_to_signum __P((char *));
  61 void usage __P((void));
  62 int main __P((int, char *[]));
  63
  64 int
  65 main(argc, argv)
  66         int argc;
  67         char *argv[];
  68 {
  69         int errors, numsig, pid;
  70         char *ep;
  71
  72         if (argc < 2)
  73                 usage();
  74
  75         numsig = SIGTERM;
  76
  77         argc--, argv++;
  78         if (!strcmp(*argv, "-l")) {
  79                 argc--, argv++;
  80                 if (argc > 1)
  81                         usage();
  82                 if (argc == 1) {
  83                         if (!isdigit(**argv))
  84                                 usage();
  85                         numsig = strtol(*argv, &ep, 10);
  86                         if (*ep)
  87                                 errx(1, "illegal signal number: %s", *argv);
  88                         if (numsig >= 128)
  89                                 numsig -= 128;
  90                         if (numsig <= 0 || numsig >= NSIG)
  91                                 nosig(*argv);
  92                         (void)printf("%s\n", sys_signame[numsig]);
  93                         exit(0);
  94                 }
  95                 printsignals(stdout);
  96                 exit(0);
  97         }
  98
  99         if (!strcmp(*argv, "-s")) {
 100                 argc--, argv++;
 101                 if (argc < 1) {
 102                         warnx("option requires an argument -- s");
 103                         usage();
 104                 }
 105                 if (strcmp(*argv, "0")) {
 106                         if ((numsig = signame_to_signum(*argv)) < 0)
 107                                 nosig(*argv);
 108                 } else
 109                         numsig = 0;
 110                 argc--, argv++;
 111         } else if (**argv == '-') {
 112                 ++*argv;
 113                 if (isalpha(**argv)) {
 114                         if ((numsig = signame_to_signum(*argv)) < 0)
 115                                 nosig(*argv);
 116                 } else if (isdigit(**argv)) {
 117                         numsig = strtol(*argv, &ep, 10);
 118                         if (!*argv || *ep)
 119                                 errx(1, "illegal signal number: %s", *argv);
 120                         if (numsig < 0 || numsig >= NSIG)
 121                                 nosig(*argv);
 122                 } else
 123                         nosig(*argv);
 124                 argc--, argv++;
 125         }
 126
 127         if (argc == 0)
 128                 usage();
 129
 130         for (errors = 0; argc; argc--, argv++) {
 131                 pid = strtol(*argv, &ep, 10);
 132                 if (!**argv || *ep) {
 133                         warnx("illegal process id: %s", *argv);
 134                         errors = 1;
 135                 } else if (kill(pid, numsig) == -1) {
 136                         warn("%s", *argv);
 137                         errors = 1;
 138                 }
 139         }
 140
 141         exit(errors);
 142         /* NOTREACHED */
 143 }
 144
 145 int
 146 signame_to_signum(sig)
 147         char *sig;
 148 {
 149         int n;
 150
 151         if (!strncasecmp(sig, "sig", 3))
 152                 sig += 3;
 153         for (n = 1; n < NSIG; n++) {
 154                 if (!strcasecmp(sys_signame[n], sig))
 155                         return (n);
 156         }
 157         return (-1);
 158 }
 159
 160 void
 161 nosig(name)
 162         char *name;
 163 {
 164
 165         warnx("unknown signal %s; valid signals:", name);
 166         printsignals(stderr);
 167         exit(1);
 168         /* NOTREACHED */
 169 }
 170
 171 void
 172 printsignals(fp)
 173         FILE *fp;
 174 {
 175         int n;
 176
 177         for (n = 1; n < NSIG; n++) {
 178                 (void)fprintf(fp, "%s", sys_signame[n]);
 179                 if (n == (NSIG / 2) || n == (NSIG - 1))
 180                         (void)fprintf(fp, "\n");
 181                 else
 182                         (void)fprintf(fp, " ");
 183         }
 184 }
 185
 186 void
 187 usage()
 188 {
 189
 190         (void)fprintf(stderr, "usage: kill [-s signal_name] pid ...\n");
 191         (void)fprintf(stderr, "       kill -l [exit_status]\n");
 192         (void)fprintf(stderr, "       kill -signal_name pid ...\n");
 193         (void)fprintf(stderr, "       kill -signal_number pid ...\n");
 194         exit(1);
 195         /* NOTREACHED */
 196 }