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authorGravatar Rob Landley <rob@landley.net>2006-03-14 02:40:51 +0000
committerGravatar Rob Landley <rob@landley.net>2006-03-14 02:40:51 +0000
commit0b22c1c962ff57e68035413d7790dd2b137a2aeb (patch)
tree19fea5141691cfadfdb2394d6d4c948609153488 /util-linux/freeramdisk.c
parent2f135fc6bf5184bf782ec6cdd39c49a708670163 (diff)
downloadbusybox-0b22c1c962ff57e68035413d7790dd2b137a2aeb.tar.gz
busybox-0b22c1c962ff57e68035413d7790dd2b137a2aeb.tar.bz2
Tito unified fdflush and freeramdisk. I tweaked the result a bit.
Diffstat (limited to 'util-linux/freeramdisk.c')
-rw-r--r--util-linux/freeramdisk.c49
1 files changed, 9 insertions, 40 deletions
diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c
index cfea35bea..b5449750a 100644
--- a/util-linux/freeramdisk.c
+++ b/util-linux/freeramdisk.c
@@ -1,24 +1,12 @@
/* 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 <andersen@codepoet.org>
+ * Unified with fdflush by Tito Ragusa <farmatito@tiscali.it>
*
- * 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
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
@@ -30,40 +18,21 @@
#include <unistd.h>
#include "busybox.h"
-
-/* From linux/fs.h */
-#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
-
-extern int
-freeramdisk_main(int argc, char **argv)
+extern int freeramdisk_main(int argc, char **argv)
{
int result;
int fd;
- if (argc != 2) {
- bb_show_usage();
- }
+ if (argc != 2) bb_show_usage();
fd = bb_xopen(argv[1], O_RDWR);
- result = ioctl(fd, BLKFLSBUF);
+ // Act like freeramdisk, fdflush, or both depending on configuration.
+ result = ioctl(fd, (bb_applet_name[1]=='r' && ENABLE_FREERAMDISK)
+ || !ENABLE_FDFLUSH ? _IO(0x12,97) : _IO(2,0x4b));
if (ENABLE_FEATURE_CLEAN_UP) close(fd);
- if (result < 0) {
- bb_perror_msg_and_die("failed ioctl on %s", argv[1]);
- }
-
- /* Don't bother closing. Exit does
- * that, so we can save a few bytes */
+ if (result) bb_perror_msg_and_die("%s", argv[1]);
return EXIT_SUCCESS;
}
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
-