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/* rxflush.c */
/** Copyright © 2016 - 2025 Petros Koutoupis
** All rights reserved.
**
** 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, see <http://www.gnu.org/licenses/>.
**
** SPDX-License-Identifier: GPL-2.0-or-later
**/
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <errno.h>
#include <string.h>
#define IOCTL_RD_BLKFLSBUF 0x0531
int main () {
int fd, rc;
if ((fd = open("/dev/rd0", O_WRONLY)) < 0) {
printf("%s\n", strerror(errno));
return errno;
}
rc = ioctl(fd, IOCTL_RD_BLKFLSBUF, 0);
printf("Sent ioctl() IOCTL_RD_BLKFLSBUF and got return: %d\n", rc);
close (fd);
return rc;
}
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