busybox/kill.c

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/* vi: set sw=4 ts=4: */
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/*
* Mini kill implementation for busybox
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
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#include "internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
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#include <ctype.h>
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#include <sys/stat.h>
#include <unistd.h>
static const char *kill_usage =
"kill [-signal] process-id [process-id ...]\n\n"
"Send a signal (default is SIGTERM) to the specified process(es).\n\n"
"Options:\n" "\t-l\tList all signal names and numbers.\n\n";
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struct signal_name {
const char *name;
int number;
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};
const struct signal_name signames[] = {
{"HUP", SIGHUP},
{"INT", SIGINT},
{"QUIT", SIGQUIT},
{"ILL", SIGILL},
{"TRAP", SIGTRAP},
{"ABRT", SIGABRT},
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#ifndef __alpha__
{"IOT", SIGIOT},
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#endif
#if defined(__sparc__) || defined(__alpha__)
{"EMT", SIGEMT},
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#else
{"BUS", SIGBUS},
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#endif
{"FPE", SIGFPE},
{"KILL", SIGKILL},
#if defined(__sparc__) || defined(__alpha__)
{"BUS", SIGBUS},
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#else
{"USR1", SIGUSR1},
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#endif
{"SEGV", SIGSEGV},
#if defined(__sparc__) || defined(__alpha__)
{"SYS", SIGSYS},
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#else
{"USR2", SIGUSR2},
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#endif
{"PIPE", SIGPIPE},
{"ALRM", SIGALRM},
{"TERM", SIGTERM},
#if defined(__sparc__) || defined(__alpha__)
{"URG", SIGURG},
{"STOP", SIGSTOP},
{"TSTP", SIGTSTP},
{"CONT", SIGCONT},
{"CHLD", SIGCHLD},
{"TTIN", SIGTTIN},
{"TTOU", SIGTTOU},
{"IO", SIGIO},
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# ifndef __alpha__
{"POLL", SIGIO},
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# endif
{"XCPU", SIGXCPU},
{"XFSZ", SIGXFSZ},
{"VTALRM", SIGVTALRM},
{"PROF", SIGPROF},
{"WINCH", SIGWINCH},
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# ifdef __alpha__
{"INFO", SIGINFO},
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# else
{"LOST", SIGLOST},
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# endif
{"USR1", SIGUSR1},
{"USR2", SIGUSR2},
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#else
{"STKFLT", SIGSTKFLT},
{"CHLD", SIGCHLD},
{"CONT", SIGCONT},
{"STOP", SIGSTOP},
{"TSTP", SIGTSTP},
{"TTIN", SIGTTIN},
{"TTOU", SIGTTOU},
{"URG", SIGURG},
{"XCPU", SIGXCPU},
{"XFSZ", SIGXFSZ},
{"VTALRM", SIGVTALRM},
{"PROF", SIGPROF},
{"WINCH", SIGWINCH},
{"IO", SIGIO},
{"POLL", SIGPOLL},
{"PWR", SIGPWR},
{"UNUSED", SIGUNUSED},
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#endif
{0, 0}
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};
extern int kill_main(int argc, char **argv)
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{
int sig = SIGTERM;
argc--;
argv++;
/* Parse any options */
if (argc < 1)
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usage(kill_usage);
while (argc > 0 && **argv == '-') {
while (*++(*argv)) {
switch (**argv) {
case 'l':
{
int col = 0;
const struct signal_name *s = signames;
while (s->name != 0) {
col +=
fprintf(stderr, "%2d) %-8s", s->number,
(s++)->name);
if (col > 60) {
fprintf(stderr, "\n");
col = 0;
}
}
fprintf(stderr, "\n\n");
exit(TRUE);
}
break;
case '-':
usage(kill_usage);
default:
{
if (isdigit(**argv)) {
sig = atoi(*argv);
if (sig < 0 || sig >= NSIG)
goto end;
else {
argc--;
argv++;
goto do_it_now;
}
} else {
const struct signal_name *s = signames;
while (s->name != 0) {
if (strcasecmp(s->name, *argv) == 0) {
sig = s->number;
argc--;
argv++;
goto do_it_now;
}
s++;
}
if (s->name == 0)
goto end;
}
}
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}
argc--;
argv++;
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}
}
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do_it_now:
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while (--argc >= 0) {
int pid;
struct stat statbuf;
char pidpath[20] = "/proc/";
if (!isdigit(**argv)) {
fprintf(stderr, "bad PID: %s\n", *argv);
exit(FALSE);
}
pid = atoi(*argv);
snprintf(pidpath, 20, "/proc/%s/stat", *argv);
if (stat(pidpath, &statbuf) != 0) {
fprintf(stderr, "kill: (%d) - No such pid\n", pid);
exit(FALSE);
}
fprintf(stderr, "sig = %d\n", sig);
if (kill(pid, sig) != 0) {
perror(*argv);
exit(FALSE);
}
argv++;
}
exit(TRUE);
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end:
fprintf(stderr, "bad signal name: %s\n", *argv);
exit(TRUE);
}