busybox/util-linux/freeramdisk.c

/* 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, see file LICENSE in this tarball for details.
 */
#include <sys/mount.h>
#include "libbb.h"

/* From <linux/fd.h> */
#define FDFLUSH  _IO(2,0x4b)

int freeramdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int freeramdisk_main(int argc UNUSED_PARAM, char **argv)
{
	int fd;

	fd = xopen(single_argv(argv), O_RDWR);

	// Act like freeramdisk, fdflush, or both depending on configuration.
	ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1] == 'r')
			|| !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]);

	if (ENABLE_FEATURE_CLEAN_UP) close(fd);

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