1 files changed, 87 insertions, 0 deletions
diff --git a/lib/libufs/block.c b/lib/libufs/block.c
new file mode 100644
index 0000000..054896f
--- /dev/null
+++ b/lib/libufs/block.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2002 Juli Mallett.  All rights reserved.
+ *
+ * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
+ * FreeBSD project.  Redistribution and use in source and binary forms, with
+ * or without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistribution of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistribution in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/disklabel.h>
+#include <sys/stat.h>
+
+#include <ufs/ufs/ufsmount.h>
+#include <ufs/ufs/dinode.h>
+#include <ufs/ffs/fs.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <libufs.h>
+
+ssize_t
+bread(struct uufsd *disk, ufs2_daddr_t blockno, void *data, size_t size)
+{
+	char *buf;
+	ssize_t cnt;
+
+	DEBUG(NULL);
+
+	/*
+	 * For when we need to work with the data as a buffer.
+	 */
+	buf = data;
+
+	cnt = pread(disk->d_fd, data, size, (off_t)(blockno * disk->d_bsize));
+	/*
+	 * In case of failure, zero data, which must be fs_bsize.
+	 */
+	if (cnt != size) {
+		DEBUG("short read");
+		for (cnt = 0; cnt < disk->d_fs.fs_bsize; cnt++)
+			buf[cnt] = 0;
+		return -1;
+	}
+	return cnt;
+}
+
+ssize_t
+bwrite(struct uufsd *disk, ufs2_daddr_t blockno, const void *data, size_t size)
+{
+	ssize_t cnt;
+
+	DEBUG(NULL);
+
+	cnt = pwrite(disk->d_fd, data, size, (off_t)(blockno * disk->d_bsize));
+	if (cnt != size) {
+		DEBUG("short write");
+		return -1;
+	}
+	
+	return cnt;
+}