Replace direct file I/O with abstraction layer

This should make it easier to use libsquashfs with custom setups that
embedd a squashfs image inside something else. Also, it should make
it easier to port to non unix-like platforms.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 6 insertions, 4 deletions

diff --git a/lib/sqfs/read_super.c b/lib/sqfs/read_super.c
index 9f7425c..23909e0 100644
--- a/lib/sqfs/read_super.c
+++ b/lib/sqfs/read_super.c
@@ -9,19 +9,21 @@
 
 #include "sqfs/super.h"
 #include "sqfs/error.h"
+#include "sqfs/io.h"
 #include "util.h"
 
 #include <endian.h>
 #include <string.h>
 
-int sqfs_super_read(sqfs_super_t *super, int fd)
+int sqfs_super_read(sqfs_super_t *super, sqfs_file_t *file)
 {
 	size_t block_size = 0;
 	sqfs_super_t temp;
-	int i;
+	int i, ret;
 
-	if (read_data_at("reading super block", 0, fd, &temp, sizeof(temp)))
-		return SQFS_ERROR_IO;
+	ret = file->read_at(file, 0, &temp, sizeof(temp));
+	if (ret)
+		return ret;
 
 	temp.magic = le32toh(temp.magic);
 	temp.inode_count = le32toh(temp.inode_count);