/* See LICENSE file for copyright and license details. */ #include <sys/ioctl.h> #include <sys/mount.h> #include <sys/types.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "util.h" static void usage(void) { eprintf("usage: %s\n", argv0); } int main(int argc, char *argv[]) { char *dev = "/dev/ram"; int fd; ARGBEGIN { default: usage(); } ARGEND; if (argc != 0) usage(); if ((fd = open(dev, O_RDWR)) < 0) eprintf("open: %s:", dev); if (ioctl(fd, BLKFLSBUF, dev) < 0) eprintf("BLKFLSBUF %s:", dev); close(fd); return 0; }