blob: a89ae1a3910a555ff3787c12ec1bb4add5d9d508
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * freeramdisk and fdflush implementations for busybox |
4 | * |
5 | * Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it> |
6 | * Adjusted a bit by Erik Andersen <andersen@codepoet.org> |
7 | * Unified with fdflush by Tito Ragusa <farmatito@tiscali.it> |
8 | * |
9 | * Licensed under GPLv2, see file LICENSE in this source tree. |
10 | */ |
11 | |
12 | //usage:#define freeramdisk_trivial_usage |
13 | //usage: "DEVICE" |
14 | //usage:#define freeramdisk_full_usage "\n\n" |
15 | //usage: "Free all memory used by the specified ramdisk" |
16 | //usage: |
17 | //usage:#define freeramdisk_example_usage |
18 | //usage: "$ freeramdisk /dev/ram2\n" |
19 | //usage: |
20 | //usage:#define fdflush_trivial_usage |
21 | //usage: "DEVICE" |
22 | //usage:#define fdflush_full_usage "\n\n" |
23 | //usage: "Force floppy disk drive to detect disk change" |
24 | |
25 | #include <sys/mount.h> |
26 | #include "libbb.h" |
27 | |
28 | /* From <linux/fd.h> */ |
29 | #define FDFLUSH _IO(2,0x4b) |
30 | |
31 | int freeramdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
32 | int freeramdisk_main(int argc UNUSED_PARAM, char **argv) |
33 | { |
34 | int fd; |
35 | |
36 | fd = xopen(single_argv(argv), O_RDWR); |
37 | |
38 | // Act like freeramdisk, fdflush, or both depending on configuration. |
39 | ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1] == 'r') |
40 | || !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]); |
41 | |
42 | if (ENABLE_FEATURE_CLEAN_UP) close(fd); |
43 | |
44 | return EXIT_SUCCESS; |
45 | } |
46 |