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-rw-r--r--util-linux/freeramdisk.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c
new file mode 100644
index 0000000..426e132
--- /dev/null
+++ b/util-linux/freeramdisk.c
@@ -0,0 +1,69 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * freeramdisk implementation 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
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include "internal.h"
+
+
+static const char freeramdisk_usage[] =
+ "freeramdisk DEVICE\n\n"
+ "Frees all memory used by the specified ramdisk.\n";
+
+extern int
+freeramdisk_main(int argc, char **argv)
+{
+ char rname[256] = "/dev/ram";
+ int f;
+
+ if (argc >= 2 || ( argv[1] && *argv[1] == '-')) {
+ usage(freeramdisk_usage);
+ }
+
+ if (argc >1)
+ strcpy(rname, argv[1]);
+
+ if ((f = open(rname, O_RDWR)) == -1) {
+ fatalError( "freeramdisk: cannot open %s: %s", rname, strerror(errno));
+ }
+ if (ioctl(f, BLKFLSBUF) < 0) {
+ fatalError( "freeramdisk: failed ioctl on %s: %s", rname, strerror(errno));
+ }
+ close(f);
+ exit(TRUE);
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
+