blob: 8a3f2fddfb38833a3683e744707c02d08a00fb49 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/* 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 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <unistd.h>
#include "busybox.h"
int freeramdisk_main(int argc, char **argv)
{
int result;
int fd;
if (argc != 2) bb_show_usage();
fd = bb_xopen(argv[1], O_RDWR);
// Act like freeramdisk, fdflush, or both depending on configuration.
result = ioctl(fd, (bb_applet_name[1]=='r' && ENABLE_FREERAMDISK)
|| !ENABLE_FDFLUSH ? _IO(0x12,97) : _IO(2,0x4b));
if (ENABLE_FEATURE_CLEAN_UP) close(fd);
if (result) bb_perror_msg_and_die("%s", argv[1]);
return EXIT_SUCCESS;
}
|
