/*
 * Copyright (c) 1989, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

/* ML

vdrrun.c
Erstellt: 030402 Matthias Lötzke <Matthias@Loetzke.de>
Benötigt meinen Kernel-Patch für include/linux/sched.h kernel/sched.c kernel/timer.c
*/

#include <sys/cdefs.h>

#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sched.h>

#define	DEFNICE	0
#define SCHED_VDR 4

void usage __P((void));

int main(int argc,char **argv)
{
	int niceness = DEFNICE;
	struct sched_param schp;
 
	if (argc < 2)
		usage();

	if (argv[1][0] == '-') {
		if (argv[1][1] == '-' || isdigit(argv[1][1])) {
			niceness = atoi(argv[1] + 1);
			++argv;
		} else
			errx(1, "illegal option -- %s", argv[1]);
	}

	if (argv[1] == NULL)
		usage();

	errno = 0;
	if (setpriority(PRIO_PROCESS, 0, niceness))
		err(1, "setpriority");

	memset(&schp, 0, sizeof(schp));
    schp.sched_priority = 0;               
                                                                            
    if (sched_setscheduler(0, SCHED_VDR, &schp) != 0) {                  
            perror("sched_setscheduler");                                   
            return -1;                                                      
    }

	execvp(argv[1], &argv[1]);
	err(1, "%s", argv[1]);
}

void
usage()
{
	(void)fprintf(stderr, "vdrrun startet Programme mit besonderer Priorität\nKernelpatch notwendig!\nusage: vdrrun [-nicelevel] command [arguments]\n");
	exit(1);
}