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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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9 | * Licensed under GPLv2, see file LICENSE in this tarball for details.
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10 | */
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11 |
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12 | #include "libbb.h"
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13 |
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14 | /* From <linux/fd.h> */
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15 | #define FDFLUSH _IO(2,0x4b)
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16 |
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17 | int freeramdisk_main(int argc, char **argv);
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18 | int freeramdisk_main(int argc, char **argv)
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19 | {
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20 | int fd;
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21 |
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22 | if (argc != 2) bb_show_usage();
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23 |
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24 | fd = xopen(argv[1], O_RDWR);
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25 |
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26 | // Act like freeramdisk, fdflush, or both depending on configuration.
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27 | ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1]=='r')
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28 | || !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]);
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29 |
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30 | if (ENABLE_FEATURE_CLEAN_UP) close(fd);
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31 |
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32 | return EXIT_SUCCESS;
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33 | }
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