import ext2fs lib to prep for new e2fsprogs

1 files changed, 69 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/io_manager.c b/e2fsprogs/ext2fs/io_manager.c
new file mode 100644
index 0000000..e50d7e4
--- /dev/null
+++ b/e2fsprogs/ext2fs/io_manager.c
@@ -0,0 +1,69 @@
+/*
+ * io_manager.c --- the I/O manager abstraction
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+errcode_t io_channel_set_options(io_channel channel, const char *opts)
+{
+	errcode_t retval = 0;
+	char *next, *ptr, *options, *arg;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+
+	if (!opts)
+		return 0;
+
+	if (!channel->manager->set_option)
+		return EXT2_ET_INVALID_ARGUMENT;
+
+	options = malloc(strlen(opts)+1);
+	if (!options)
+		return EXT2_ET_NO_MEMORY;
+	strcpy(options, opts);
+	ptr = options;
+
+	while (ptr && *ptr) {
+		next = strchr(ptr, '&');
+		if (next)
+			*next++ = 0;
+
+		arg = strchr(ptr, '=');
+		if (arg)
+			*arg++ = 0;
+
+		retval = (channel->manager->set_option)(channel, ptr, arg);
+		if (retval)
+			break;
+		ptr = next;
+	}
+	free(options);
+	return retval;
+}
+
+errcode_t io_channel_write_byte(io_channel channel, unsigned long offset,
+				int count, const void *data)
+{
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+
+	if (channel->manager->write_byte) 
+		return channel->manager->write_byte(channel, offset, 
+						    count, data);
+
+	return EXT2_ET_UNIMPLEMENTED;
+}