NetBSD/bin/kill/kill.c

254 lines
6.2 KiB
C

/* $NetBSD: kill.c,v 1.27 2011/08/29 14:51:18 joerg Exp $ */
/*
* Copyright (c) 1988, 1993, 1994
* The 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. 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.
*/
#include <sys/cdefs.h>
#if !defined(lint) && !defined(SHELL)
__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)kill.c 8.4 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: kill.c,v 1.27 2011/08/29 14:51:18 joerg Exp $");
#endif
#endif /* not lint */
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <inttypes.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <locale.h>
#include <sys/ioctl.h>
#ifdef SHELL /* sh (aka ash) builtin */
int killcmd(int, char *argv[]);
#define main killcmd
#include "../../bin/sh/bltin/bltin.h"
#endif /* SHELL */
__dead static void nosig(char *);
static void printsignals(FILE *);
static int signame_to_signum(char *);
__dead static void usage(void);
int
main(int argc, char *argv[])
{
int errors;
intmax_t numsig, pid;
char *ep;
setprogname(argv[0]);
setlocale(LC_ALL, "");
if (argc < 2)
usage();
numsig = SIGTERM;
argc--, argv++;
if (strcmp(*argv, "-l") == 0) {
argc--, argv++;
if (argc > 1)
usage();
if (argc == 1) {
if (isdigit((unsigned char)**argv) == 0)
usage();
numsig = strtoimax(*argv, &ep, 10);
/* check for correctly parsed number */
if (*ep != '\0' || numsig == INTMAX_MIN || numsig == INTMAX_MAX) {
errx(EXIT_FAILURE, "illegal signal number: %s",
*argv);
/* NOTREACHED */
}
if (numsig >= 128)
numsig -= 128;
/* and whether it fits into signals range */
if (numsig <= 0 || numsig >= NSIG)
nosig(*argv);
printf("%s\n", sys_signame[(int) numsig]);
exit(0);
}
printsignals(stdout);
exit(0);
}
if (!strcmp(*argv, "-s")) {
argc--, argv++;
if (argc < 1) {
warnx("option requires an argument -- s");
usage();
}
if (strcmp(*argv, "0")) {
if ((numsig = signame_to_signum(*argv)) < 0)
nosig(*argv);
} else
numsig = 0;
argc--, argv++;
} else if (**argv == '-') {
char *sn = *argv + 1;
if (isalpha((unsigned char)*sn)) {
if ((numsig = signame_to_signum(sn)) < 0)
nosig(sn);
} else if (isdigit((unsigned char)*sn)) {
numsig = strtoimax(sn, &ep, 10);
/* check for correctly parsed number */
if (*ep || numsig == INTMAX_MIN || numsig == INTMAX_MAX ) {
errx(EXIT_FAILURE, "illegal signal number: %s",
sn);
/* NOTREACHED */
}
/* and whether it fits into signals range */
if (numsig < 0 || numsig >= NSIG)
nosig(sn);
} else
nosig(sn);
argc--, argv++;
}
if (argc == 0)
usage();
for (errors = 0; argc; argc--, argv++) {
#ifdef SHELL
extern int getjobpgrp(const char *);
if (*argv[0] == '%') {
pid = getjobpgrp(*argv);
if (pid == 0) {
warnx("illegal job id: %s", *argv);
errors = 1;
continue;
}
} else
#endif
{
pid = strtoimax(*argv, &ep, 10);
/* make sure the pid is a number and fits into pid_t */
if (!**argv || *ep || pid == INTMAX_MIN ||
pid == INTMAX_MAX || pid != (pid_t) pid) {
warnx("illegal process id: %s", *argv);
errors = 1;
continue;
}
}
if (kill((pid_t) pid, (int) numsig) == -1) {
warn("%s", *argv);
errors = 1;
}
#ifdef SHELL
/* Wakeup the process if it was suspended, so it can
exit without an explicit 'fg'. */
if (numsig == SIGTERM || numsig == SIGHUP)
kill((pid_t) pid, SIGCONT);
#endif
}
exit(errors);
/* NOTREACHED */
}
static int
signame_to_signum(char *sig)
{
int n;
if (strncasecmp(sig, "sig", 3) == 0)
sig += 3;
for (n = 1; n < NSIG; n++) {
if (!strcasecmp(sys_signame[n], sig))
return (n);
}
return (-1);
}
static void
nosig(char *name)
{
warnx("unknown signal %s; valid signals:", name);
printsignals(stderr);
exit(1);
/* NOTREACHED */
}
static void
printsignals(FILE *fp)
{
int sig;
int len, nl;
const char *name;
int termwidth = 80;
if (isatty(fileno(fp))) {
struct winsize win;
if (ioctl(fileno(fp), TIOCGWINSZ, &win) == 0 && win.ws_col > 0)
termwidth = win.ws_col;
}
for (len = 0, sig = 1; sig < NSIG; sig++) {
name = sys_signame[sig];
nl = 1 + strlen(name);
if (len + nl >= termwidth) {
fprintf(fp, "\n");
len = 0;
} else
if (len != 0)
fprintf(fp, " ");
len += nl;
fprintf(fp, "%s", name);
}
if (len != 0)
fprintf(fp, "\n");
}
static void
usage(void)
{
fprintf(stderr, "usage: %s [-s signal_name] pid ...\n"
" %s -l [exit_status]\n"
" %s -signal_name pid ...\n"
" %s -signal_number pid ...\n",
getprogname(), getprogname(), getprogname(), getprogname());
exit(1);
/* NOTREACHED */
}