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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <errno.h>
int main(int argc, char **argv)
{
char rname[256]="/dev/ram";
char b[256];
int f;
if (argv[1]) strcpy(rname,argv[1]);
#if 0 /* don't use on a living system, /etc/mtab is not updated */
if (umount(rname) && (errno != ENOENT)) {
sprintf(b,"freeramdisk: cannot umount %s %d",rname,errno);
perror(b);
exit(1);
}
#endif
if ((f=open(rname,O_RDWR)) == -1) {
sprintf(b,"freeramdisk: cannot open %s",rname);
perror(b);
exit(1);
}
ioctl(f,BLKFLSBUF);
close(f);
}
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