From 578fc9124db4c50ca8c5fac865296139be8c8dfd Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Tue, 11 Jun 2019 17:45:44 +0200 Subject: Move file extraction code to generic data_reader_t in libsquashfs.a Signed-off-by: David Oberhollenzer --- include/data_reader.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 include/data_reader.h (limited to 'include') diff --git a/include/data_reader.h b/include/data_reader.h new file mode 100644 index 0000000..68788b4 --- /dev/null +++ b/include/data_reader.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef DATA_READER_H +#define DATA_READER_H + +#include "squashfs.h" +#include "compress.h" +#include "fstree.h" + +typedef struct data_reader_t data_reader_t; + +/* + Create a data reader for accessing data blocks in a squashfs image. + + Internally creates a fragment_reader_t (if applicable) to resolve + fragment indices. + + Prints error messsages to stderr on failure. + */ +data_reader_t *data_reader_create(int fd, sqfs_super_t *super, + compressor_t *cmp); + +void data_reader_destroy(data_reader_t *data); + +/* + Use a file_info_t to locate and extract all blocks of the coresponding + file and its fragment, if it has one. The entire data is dumped to the + given file descriptor. + + Returns 0 on success, prints error messages to stderr on failure. + */ +int data_reader_dump_file(data_reader_t *data, file_info_t *fi, int outfd); + +#endif /* DATA_READER_H */ -- cgit v1.2.3