/* vi: set sw=4 ts=4: */
/*
- * freeramdisk implementation for busybox
+ * freeramdisk and fdflush implementations for busybox
*
* Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it>
- * Adjusted a bit by Erik Andersen <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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 source tree.
*/
-#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <errno.h>
-#include "internal.h"
-
-
-/* From linux/fs.h */
-#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
-
-
-static const char freeramdisk_usage[] =
- "freeramdisk DEVICE\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nFrees all memory used by the specified ramdisk.\n"
-#endif
- ;
-
-extern int
-freeramdisk_main(int argc, char **argv)
+//usage:#define freeramdisk_trivial_usage
+//usage: "DEVICE"
+//usage:#define freeramdisk_full_usage "\n\n"
+//usage: "Free all memory used by the specified ramdisk"
+//usage:
+//usage:#define freeramdisk_example_usage
+//usage: "$ freeramdisk /dev/ram2\n"
+//usage:
+//usage:#define fdflush_trivial_usage
+//usage: "DEVICE"
+//usage:#define fdflush_full_usage "\n\n"
+//usage: "Force floppy disk drive to detect disk change"
+
+#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 f;
+ int fd;
- if (argc != 2 || *argv[1] == '-') {
- usage(freeramdisk_usage);
- }
+ fd = xopen(single_argv(argv), O_RDWR);
- if ((f = open(argv[1], O_RDWR)) == -1) {
- fatalError( "cannot open %s: %s\n", argv[1], strerror(errno));
- }
- if (ioctl(f, BLKFLSBUF) < 0) {
- fatalError( "failed ioctl on %s: %s\n", argv[1], strerror(errno));
- }
- /* Don't bother closing. Exit does
- * that, so we can save a few bytes */
- /* close(f); */
- return(TRUE);
-}
+ // 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]);
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ if (ENABLE_FEATURE_CLEAN_UP) close(fd);
+ return EXIT_SUCCESS;
+}