BSD 4_3_Net_2 release

[unix-history] / usr / src / bin / kill / kill.c

/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)kill.c      5.3 (Berkeley) 7/1/91";
#endif /* not lint */

#include <signal.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

static char *signals[] = {
       "hup", "int", "quit", "ill", "trap", "iot",             /*  1 - 6  */
       "emt", "fpe", "kill", "bus", "segv", "sys",             /*  7 - 12 */
       "pipe", "alrm",  "term", "urg", "stop", "tstp",         /* 13 - 18 */
       "cont", "chld", "ttin", "ttou", "io", "xcpu",           /* 19 - 24 */
       "xfsz", "vtalrm", "prof", "winch", "info", "usr1",      /* 25 - 30 */
       "usr2", NULL,                                           /* 31 - 32 */
};

main(argc, argv)
       int argc;
       char **argv;
{
       register int errors, numsig, pid;
       register char **p;
       char *ep;

       if (argc < 2)
               usage();

       if (!strcmp(*++argv, "-l")) {
               printsig(stdout);
               exit(0);
       }

       numsig = SIGTERM;
       if (**argv == '-') {
               ++*argv;
               if (isalpha(**argv)) {
                       if (!strncasecmp(*argv, "sig", 3))
                               *argv += 3;
                       for (p = signals;; ++p) {
                               if (!*p)
                                       nosig(*argv);
                               if (!strcasecmp(*p, *argv)) {
                                       numsig = p - signals + 1;
                                       break;
                               }
                       }
               } else if (isdigit(**argv)) {
                       numsig = strtol(*argv, &ep, 10);
                       if (!*argv || *ep) {
                               (void)fprintf(stderr,
                                   "kill: illegal signal number %s\n", *argv);
                               exit(1);
                       }
                       if (numsig <= 0 || numsig > NSIG)
                               nosig(*argv);
               } else
                       nosig(*argv);
               ++argv;
       }

       if (!*argv)
               usage();

       for (errors = 0; *argv; ++argv) {
               pid = strtol(*argv, &ep, 10);
               if (!*argv || *ep) {
                       (void)fprintf(stderr,
                           "kill: illegal process id %s\n", *argv);
                       continue;
               }
               if (kill(pid, numsig) == -1) {
                       (void)fprintf(stderr,
                           "kill: %s: %s\n", *argv, strerror(errno));
                       errors = 1;
               }
       }
       exit(errors);
}

nosig(name)
       char *name;
{
       (void)fprintf(stderr,
           "kill: unknown signal %s; valid signals:\n", name);
       printsig(stderr);
       exit(1);
}

printsig(fp)
       FILE *fp;
{
       register char **p;

       for (p = signals; *p; ++p) {
               (void)fprintf(fp, "%s ", *p);
               if ((p - signals) == NSIG / 2 - 1)
                       (void)fprintf(fp, "\n");
       }
       (void)fprintf(fp, "\n");
}

usage()
{
       (void)fprintf(stderr, "usage: kill [-l] [-sig] pid ...\n");
       exit(1);
}