253 lines
6.2 KiB
C
253 lines
6.2 KiB
C
/* $NetBSD: kill.c,v 1.27 2011/08/29 14:51:18 joerg 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 <sys/cdefs.h>
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#if !defined(lint) && !defined(SHELL)
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__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: kill.c,v 1.27 2011/08/29 14:51:18 joerg Exp $");
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#endif
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#endif /* not lint */
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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 <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <inttypes.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <locale.h>
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#include <sys/ioctl.h>
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#ifdef SHELL /* sh (aka ash) builtin */
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int killcmd(int, char *argv[]);
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#define main killcmd
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#include "../../bin/sh/bltin/bltin.h"
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#endif /* SHELL */
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__dead static void nosig(char *);
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static void printsignals(FILE *);
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static int signame_to_signum(char *);
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__dead static 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;
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intmax_t numsig, pid;
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char *ep;
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setprogname(argv[0]);
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setlocale(LC_ALL, "");
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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") == 0) {
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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) == 0)
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usage();
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numsig = strtoimax(*argv, &ep, 10);
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/* check for correctly parsed number */
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if (*ep != '\0' || numsig == INTMAX_MIN || numsig == INTMAX_MAX) {
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errx(EXIT_FAILURE, "illegal signal number: %s",
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*argv);
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/* NOTREACHED */
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}
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if (numsig >= 128)
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numsig -= 128;
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/* and whether it fits into signals range */
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if (numsig <= 0 || numsig >= NSIG)
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nosig(*argv);
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printf("%s\n", sys_signame[(int) numsig]);
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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 < 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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char *sn = *argv + 1;
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if (isalpha((unsigned char)*sn)) {
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if ((numsig = signame_to_signum(sn)) < 0)
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nosig(sn);
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} else if (isdigit((unsigned char)*sn)) {
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numsig = strtoimax(sn, &ep, 10);
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/* check for correctly parsed number */
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if (*ep || numsig == INTMAX_MIN || numsig == INTMAX_MAX ) {
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errx(EXIT_FAILURE, "illegal signal number: %s",
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sn);
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/* NOTREACHED */
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}
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/* and whether it fits into signals range */
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if (numsig < 0 || numsig >= NSIG)
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nosig(sn);
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} else
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nosig(sn);
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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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#ifdef SHELL
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extern int getjobpgrp(const char *);
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if (*argv[0] == '%') {
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pid = getjobpgrp(*argv);
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if (pid == 0) {
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warnx("illegal job id: %s", *argv);
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errors = 1;
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continue;
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}
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} else
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#endif
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{
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pid = strtoimax(*argv, &ep, 10);
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/* make sure the pid is a number and fits into pid_t */
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if (!**argv || *ep || pid == INTMAX_MIN ||
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pid == INTMAX_MAX || pid != (pid_t) pid) {
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warnx("illegal process id: %s", *argv);
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errors = 1;
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continue;
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}
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}
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if (kill((pid_t) pid, (int) numsig) == -1) {
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warn("%s", *argv);
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errors = 1;
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}
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#ifdef SHELL
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/* Wakeup the process if it was suspended, so it can
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exit without an explicit 'fg'. */
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if (numsig == SIGTERM || numsig == SIGHUP)
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kill((pid_t) pid, SIGCONT);
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#endif
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}
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exit(errors);
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/* NOTREACHED */
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}
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static 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) == 0)
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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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static 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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/* NOTREACHED */
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}
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static void
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printsignals(FILE *fp)
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{
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int sig;
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int len, nl;
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const char *name;
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int termwidth = 80;
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if (isatty(fileno(fp))) {
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struct winsize win;
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if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0)
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termwidth = win.ws_col;
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}
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for (len = 0, sig = 1; sig < NSIG; sig++) {
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name = sys_signame[sig];
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nl = 1 + strlen(name);
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if (len + nl >= termwidth) {
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fprintf(fp, "\n");
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len = 0;
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} else
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if (len != 0)
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fprintf(fp, " ");
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len += nl;
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fprintf(fp, "%s", name);
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}
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if (len != 0)
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fprintf(fp, "\n");
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: %s [-s signal_name] pid ...\n"
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" %s -l [exit_status]\n"
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" %s -signal_name pid ...\n"
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" %s -signal_number pid ...\n",
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getprogname(), getprogname(), getprogname(), getprogname());
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exit(1);
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/* NOTREACHED */
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}
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