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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-05 17:38:08 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-05 17:45:59 +0200
commit88f75857702bcc6a2a423570912140c125ec518a (patch)
treea1ec54e2520e076395208872d36606f917c8ca34 /include/highlevel.h
parent3a340b12eb9b7ed86a47391345cb836fa662b2d9 (diff)
cleanup: unify all the code that reads squashfs images
This commit creates a new data structure called 'sqfs_reader_t' that takes care of all the repetetive tasks like opening the file, reading the super block, creating the compressor, deserializing an fstree and creating a data reader. This in turn makes it possible to remove all the duplicate code from rdsquashfs and sqfs2tar. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'include/highlevel.h')
-rw-r--r--include/highlevel.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/highlevel.h b/include/highlevel.h
index e3afbd7..f8c5bfb 100644
--- a/include/highlevel.h
+++ b/include/highlevel.h
@@ -9,6 +9,7 @@
#include "config.h"
+#include "data_reader.h"
#include "squashfs.h"
#include "compress.h"
#include "id_table.h"
@@ -17,6 +18,14 @@
#include <stdint.h>
#include <stddef.h>
+typedef struct {
+ compressor_t *cmp;
+ data_reader_t *data;
+ sqfs_super_t super;
+ fstree_t fs;
+ int sqfsfd;
+} sqfs_reader_t;
+
enum RDTREE_FLAGS {
RDTREE_NO_DEVICES = 0x01,
RDTREE_NO_SOCKETS = 0x02,
@@ -96,4 +105,14 @@ int write_export_table(int outfd, fstree_t *fs, sqfs_super_t *super,
/* Print out fancy statistics for squashfs packing tools */
void sqfs_print_statistics(fstree_t *fs, sqfs_super_t *super);
+/* Open a squashfs file, extract all the information we may need and
+ construct datastructures we need to access its contents.
+ Returns 0 on success. Prints error messages to stderr on failure.
+*/
+int sqfs_reader_open(sqfs_reader_t *rd, const char *filename,
+ int rdtree_flags);
+
+/* Cleanup after a successfull sqfs_reader_open */
+void sqfs_reader_close(sqfs_reader_t *rd);
+
#endif /* HIGHLEVEL_H */