unsquashfs: add flags to filter what file types to unpack

This allows the user to skip stuff like device special files (which
non-root can't create anyway) or to not create symlinks/fifos etc...

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

1 files changed, 14 insertions, 2 deletions

diff --git a/unpack/unsquashfs.h b/unpack/unsquashfs.h
index 5895fb8..a8784fc 100644
--- a/unpack/unsquashfs.h
+++ b/unpack/unsquashfs.h
@@ -19,12 +19,23 @@
 #include <fcntl.h>
 #include <stdio.h>
 
+enum UNPACK_FLAGS {
+	UNPACK_NO_DEVICES = 0x01,
+	UNPACK_NO_SOCKETS = 0x02,
+	UNPACK_NO_FIFO = 0x04,
+	UNPACK_NO_SLINKS = 0x08,
+	UNPACK_NO_EMPTY = 0x10,
+	UNPACK_CHMOD = 0x20,
+	UNPACK_CHOWN = 0x40,
+};
+
 tree_node_t *tree_node_from_inode(sqfs_inode_generic_t *inode,
 				  const id_table_t *idtbl,
 				  const char *name,
 				  size_t block_size);
 
-int read_fstree(fstree_t *out, int fd, sqfs_super_t *super, compressor_t *cmp);
+int read_fstree(fstree_t *out, int fd, sqfs_super_t *super, compressor_t *cmp,
+		int flags);
 
 void list_files(tree_node_t *node);
 
@@ -32,6 +43,7 @@ int extract_file(file_info_t *fi, compressor_t *cmp, size_t block_size,
 		 frag_reader_t *frag, int sqfsfd, int outfd);
 
 int restore_fstree(const char *rootdir, tree_node_t *root, compressor_t *cmp,
-		   size_t block_size, frag_reader_t *frag, int sqfsfd);
+		   size_t block_size, frag_reader_t *frag, int sqfsfd,
+		   int flags);
 
 #endif /* UNSQUASHFS_H */