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https://github.com/topjohnwu/ndk-busybox.git
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62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini fdflush implementation for busybox
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*
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*
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* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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/* From <linux/fd.h> */
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#define FDFLUSH _IO(2,0x4b)
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extern int fdflush_main(int argc, char **argv)
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{
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int value;
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int fd;
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if (argc <= 1 || **(++argv) == '-') {
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usage("fdflush DEVICE\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nForces floppy disk drive to detect disk change\n"
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#endif
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);
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}
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fd = open(*argv, 0);
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if (fd < 0) {
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perror(*argv);
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exit(FALSE);
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}
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value = ioctl(fd, FDFLUSH, 0);
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/* Don't bother closing. Exit does
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* that, so we can save a few bytes */
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/* close(fd); */
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if (value) {
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perror(*argv);
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exit(FALSE);
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}
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return(TRUE);
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}
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