186 lines
4.6 KiB
C
186 lines
4.6 KiB
C
/* $OpenBSD: kill.c,v 1.14 2017/03/29 22:40:15 millert Exp $ */
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/* $NetBSD: kill.c,v 1.11 1995/09/07 06:30:27 jtc Exp $ */
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/*
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* Copyright (c) 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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extern char *__progname;
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void nosig(char *);
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void printsignals(FILE *);
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int signame_to_signum(char *);
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void usage(void);
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int
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main(int argc, char *argv[])
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{
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int errors, numsig, pid;
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const char *errstr;
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if (pledge("stdio proc", NULL) == -1)
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err(1, "pledge");
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if (argc < 2)
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usage();
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numsig = SIGTERM;
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argc--, argv++;
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if (!strcmp(*argv, "-l")) {
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argc--, argv++;
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if (argc > 0 && !strcmp(*argv, "--"))
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argc--, argv++;
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if (argc > 1)
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usage();
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if (argc == 1) {
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if (!isdigit((unsigned char)**argv))
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usage();
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numsig = strtonum(*argv, 1, NSIG + 127, &errstr);
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if (errstr != NULL) {
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if (errno == ERANGE)
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nosig(*argv);
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errx(1, "illegal signal number: %s", *argv);
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}
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printf("%s\n", sys_signame[numsig & 127]);
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exit(0);
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}
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printsignals(stdout);
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exit(0);
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}
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if (!strcmp(*argv, "-s")) {
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argc--, argv++;
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if (argc > 0 && !strcmp(*argv, "--"))
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argc--, argv++;
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if (argc < 1) {
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warnx("option requires an argument -- s");
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usage();
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}
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if (strcmp(*argv, "0")) {
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if ((numsig = signame_to_signum(*argv)) < 0)
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nosig(*argv);
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} else
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numsig = 0;
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argc--, argv++;
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} else if (**argv == '-') {
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if (strcmp(*argv, "--")) {
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++*argv;
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if (isalpha((unsigned char)**argv)) {
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if ((numsig = signame_to_signum(*argv)) < 0)
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nosig(*argv);
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} else if (isdigit((unsigned char)**argv)) {
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numsig = strtonum(*argv, 0, NSIG - 1, &errstr);
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if (errstr != NULL) {
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if (errno == ERANGE)
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nosig(*argv);
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errx(1, "illegal signal number: %s", *argv);
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}
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} else
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nosig(*argv);
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}
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argc--, argv++;
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}
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if (argc == 0)
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usage();
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for (errors = 0; argc; argc--, argv++) {
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pid = strtonum(*argv, -INT_MAX, INT_MAX, &errstr);
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if (errstr != NULL) {
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warnx("illegal process id: %s", *argv);
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errors = 1;
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} else if (kill(pid, numsig) == -1) {
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warn("%s", *argv);
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errors = 1;
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}
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}
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exit(errors);
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}
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int
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signame_to_signum(char *sig)
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{
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int n;
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if (!strncasecmp(sig, "sig", 3))
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sig += 3;
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for (n = 1; n < NSIG; n++) {
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if (!strcasecmp(sys_signame[n], sig))
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return (n);
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}
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return (-1);
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}
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void
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nosig(char *name)
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{
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warnx("unknown signal %s; valid signals:", name);
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printsignals(stderr);
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exit(1);
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}
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void
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printsignals(FILE *fp)
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{
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int n;
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for (n = 1; n < NSIG; n++) {
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(void)fprintf(fp, "%s", sys_signame[n]);
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if (n == (NSIG / 2) || n == (NSIG - 1))
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(void)fprintf(fp, "\n");
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else
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(void)fprintf(fp, " ");
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}
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}
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void
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usage(void)
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{
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(void)fprintf(stderr, "usage: %s [-s signal_name] pid ...\n",
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__progname);
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(void)fprintf(stderr, " %s -l [exit_status]\n", __progname);
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(void)fprintf(stderr, " %s -signal_name pid ...\n",
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__progname);
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(void)fprintf(stderr, " %s -signal_number pid ...\n",
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__progname);
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exit(1);
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}
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