1 files changed, 34 insertions, 0 deletions

diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c
new file mode 100644
index 000000000..2293d3ee6
--- /dev/null
+++ b/util-linux/freeramdisk.c
@@ -0,0 +1,34 @@
+/* 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 "busybox.h"
+
+/* From <linux/fd.h> */
+#define FDFLUSH  _IO(2,0x4b)
+
+int freeramdisk_main(int argc, char **argv)
+{
+        int result;
+        int fd;
+
+        if (argc != 2) bb_show_usage();
+
+        fd = xopen(argv[1], O_RDWR);
+
+        // Act like freeramdisk, fdflush, or both depending on configuration.
+        result = ioctl(fd, (ENABLE_FREERAMDISK && applet_name[1]=='r')
+                        || !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH);
+
+        if (ENABLE_FEATURE_CLEAN_UP) close(fd);
+
+        if (result) bb_perror_msg_and_die("%s", argv[1]);
+        return EXIT_SUCCESS;
+}