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/* vi: set sw=4 ts=4: */
/*
* freeramdisk and fdflush implementations for busybox
*
* Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it>
* Adjusted a bit by Erik Andersen <andersen@codepoet.org>
* Unified with fdflush by Tito Ragusa <farmatito@tiscali.it>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//usage:#define freeramdisk_trivial_usage
//usage: "DEVICE"
//usage:#define freeramdisk_full_usage "\n\n"
//usage: "Free all memory used by the specified ramdisk"
//usage:
//usage:#define freeramdisk_example_usage
//usage: "$ freeramdisk /dev/ram2\n"
//usage:
//usage:#define fdflush_trivial_usage
//usage: "DEVICE"
//usage:#define fdflush_full_usage "\n\n"
//usage: "Force floppy disk drive to detect disk change"
#include <sys/mount.h>
#include "libbb.h"
/* From <linux/fd.h> */
#define FDFLUSH _IO(2,0x4b)
int freeramdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int freeramdisk_main(int argc UNUSED_PARAM, char **argv)
{
int fd;
fd = xopen(single_argv(argv), O_RDWR);
// Act like freeramdisk, fdflush, or both depending on configuration.
ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1] == 'r')
|| !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]);
if (ENABLE_FEATURE_CLEAN_UP) close(fd);
return EXIT_SUCCESS;
}
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