/*
 * cdcheck - check CDROM/DVD status
 *
 * Returns 0 if there is a disc in the drive or 1 (drive not ready), 
 * 2 (tray open), 3 (no disc), 4 (no info), 10 (error)
 * 
 * Copyright (C) 2005 Schlomo Schapiro <cdcheck@schlomo.schapiro.org> [GSS]
 *
 * Licensed under the GNU GPL http://www.gnu.org/copyleft/gpl.html
 *
 * Versions:
 * 2005-08-04	GSS	Initial release
 *
 * Installation:
 * Compile with "gcc -o cdcheck cdcheck.c" and copy to your favourite bin path,
 * e.g. /usr/bin
 */


#include <sys/types.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/cdrom.h>

int main(int argc,char **argv)
{
	int cdrom;                           /* CDROM device file descriptor */
	int status;

	if (argc <2 ) {
		printf("cdcheck /dev/cdrom-device\nreturn 0 if there is a disc inserted\nCopyright (C) 2005 Schlomo Schapiro\nRead the source for more information\n");
		exit(9);
	}

	if ((cdrom = open(argv[1],O_RDONLY | O_NONBLOCK)) < 0) {
		perror("open");
		exit(1);
	}

	status=ioctl(cdrom,CDROM_DRIVE_STATUS);
	close(cdrom);
	if (status<0) {
		perror("ioctl CDROM_DRIVE_STATUS");
		exit(10);
	}
	exit(4-status); /* 4=disc in should result in a true return code */
}