[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * freeramdisk and fdflush implementations for busybox
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| 4 | *
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| 5 | * Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it>
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| 6 | * Adjusted a bit by Erik Andersen <andersen@codepoet.org>
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| 7 | * Unified with fdflush by Tito Ragusa <farmatito@tiscali.it>
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| 8 | *
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[2725] | 9 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[821] | 10 | */
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[3232] | 11 |
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| 12 | //usage:#define freeramdisk_trivial_usage
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| 13 | //usage: "DEVICE"
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| 14 | //usage:#define freeramdisk_full_usage "\n\n"
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| 15 | //usage: "Free all memory used by the specified ramdisk"
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| 16 | //usage:
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| 17 | //usage:#define freeramdisk_example_usage
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| 18 | //usage: "$ freeramdisk /dev/ram2\n"
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| 19 | //usage:
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| 20 | //usage:#define fdflush_trivial_usage
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| 21 | //usage: "DEVICE"
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| 22 | //usage:#define fdflush_full_usage "\n\n"
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| 23 | //usage: "Force floppy disk drive to detect disk change"
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| 24 |
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[2725] | 25 | #include <sys/mount.h>
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[1765] | 26 | #include "libbb.h"
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[821] | 27 |
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| 28 | /* From <linux/fd.h> */
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| 29 | #define FDFLUSH _IO(2,0x4b)
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| 30 |
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[2725] | 31 | int freeramdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 32 | int freeramdisk_main(int argc UNUSED_PARAM, char **argv)
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[821] | 33 | {
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| 34 | int fd;
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| 35 |
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[2725] | 36 | fd = xopen(single_argv(argv), O_RDWR);
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[821] | 37 |
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| 38 | // Act like freeramdisk, fdflush, or both depending on configuration.
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[2725] | 39 | ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1] == 'r')
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[1765] | 40 | || !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]);
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[821] | 41 |
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| 42 | if (ENABLE_FEATURE_CLEAN_UP) close(fd);
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| 43 |
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| 44 | return EXIT_SUCCESS;
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| 45 | }
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