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 000000000..e50d7e414
--- /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;
+}