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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krad/t_daemon.h - Daemonization helper for RADIUS test programs */
/*
* Copyright 2013 Red Hat, Inc. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER
* 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 T_DAEMON_H_
#define T_DAEMON_H_
#include "t_test.h"
#include <libgen.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
static pid_t daemon_pid;
static void
daemon_stop(void)
{
if (daemon_pid == 0)
return;
kill(daemon_pid, SIGTERM);
waitpid(daemon_pid, NULL, 0);
daemon_pid = 0;
}
static krb5_boolean
daemon_start(int argc, const char **argv)
{
int fds[2];
char buf[1];
if (argc != 3 || argv == NULL)
return FALSE;
if (daemon_pid != 0)
return TRUE;
if (pipe(fds) != 0)
return FALSE;
/* Start the child process with the write end of the pipe as stdout. */
daemon_pid = fork();
if (daemon_pid == 0) {
dup2(fds[1], STDOUT_FILENO);
close(fds[0]);
close(fds[1]);
exit(execlp(argv[1], argv[1], argv[2], NULL));
}
close(fds[1]);
/* The child will write a sentinel character when it is listening. */
if (read(fds[0], buf, 1) != 1 || *buf != '~')
return FALSE;
close(fds[0]);
atexit(daemon_stop);
return TRUE;
}
#endif /* T_DAEMON_H_ */
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