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2019-09-15Move sparse_map_t to libsquashfs headers, rename it to sqfs_sparse_map_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-11Cleanup Automake file for librariesDavid Oberhollenzer
Split the signel file up into several small ones and use a variable for the public headers instead of duplicating them. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-08-03Fix tar header error reporting on 32 bit systemsDavid Oberhollenzer
If an extension header is rejected because its too big, the error path would print the size as size_t, altough it is an uint64_t. On 64 bit systems, this works because size_t is a 64 bit unsigned integer, on 32 bit systems, not so much. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-08-01Add ability to write_tar_header to embedd extended attributesDavid Oberhollenzer
This commit patches the tar writer to generate a PAX header with SCHILY xattr key/value pairs if requested. The Schily format is used for two reasons: - It is simple - It is apparently more widely supported than the libarchive format Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-30Add propper copyright headers to all source filesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-25Use safer string copy function to fill tar headerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-25Enforce reasonable upper and low bounds on the size of tar headersDavid Oberhollenzer
Since they are read directly into memory, blindly allocating the size from the tar ball is probably a bad idea. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-24Fix processing of tar mtime on 32 bit systemsDavid Oberhollenzer
struct stat uses time_t to store time values. On some 32 bit systems, this may be a 32 bit integer. This patch adds a broken-out 64 bit time value to tar_header_decoded_t and makes sure to clamp the value to +/- (2^32 - 1) if required when writing it back to a struct stat. Reported-by: Matt Turner <mattst88@gmail.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-24cleanup: remove atime/ctime processing codeDavid Oberhollenzer
This commit removes all the code for parsing and processing atime/ctime and values and related test code. Caring about those is kind of pointless because squashfs can only store mtime in inodes. The only relevant place is when generating a struct stat from a squashfs inode or an fstree node. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-24Enable largefile supportMatt Turner
Requires that config.h be included before other headers, since the macro _FILE_OFFSET_BITS changes the definitions of things like 'struct stat'. I chose to simply include it at the top of every C file and at immediately after the double-inclusion guards of every header. Signed-off-by: Matt Turner <mattst88@gmail.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-24libtar: more lenient tar checksum verificationDavid Oberhollenzer
Until now, the tar checksum verification simply copied the header, recomputed the checksum and compared it byte-for-byte with the original. However, not all implementations store the checksum the same way. For instance, git-archive generates tar balls that use the same format as for other octal numbers. This patch makes the checksum verification more lenient by parsing the checksum from the header and comparing it with the computed value instead of copying the entire block and insisting on byte-for-byte equivalence. The result is better interoperabillity with existing tools and perhaps slightly faster processing since the block doesn't have to be copied. Reported-by: Matt Turner <mattst88@gmail.com> Suggested-by: René Scharfe <l.s.r@web.de> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-16cleanup: move error handling into read_retryDavid Oberhollenzer
If read_retry fails to read the expected amount of data (EOF or otherwise), it is almost always an error. This commit renames read_retry to read_data and moves error handling into the function, making a lot of error handling code redundant. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-16cleanup: move error handling into write_retryDavid Oberhollenzer
If write_retry fails to write everything, it is *always* an error. This commit renames write_retry to write_data and moves error handling into the function, making a lot of error handling code redundant. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-04libtar: add support for xattr extensionsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-04Fix composition order of prefix + name for ustarDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-03Add no-skip option to sqfs2tarDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-03tar writer: replace PAX headers with GNU extensionsDavid Oberhollenzer
Some experiments seem to indicate that the various GNU extensions are more widely supported than their POSIX equivalents[1]. Possibly because they are easier to implement and possibly because of the wide spread use of GNU tar. This commit replaces the PAX writer in the write_tar_header implementation with a GNU extension based writer. The writer is also cleaned up by removing all global state. The record counter is moved outside into the tar2sqfs program and passed in as function argument. [1] https://dev.gentoo.org/~mgorny/articles/portability-of-tar-features.html Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-03Fix: don't blindly strcpy() the tar header nameDavid Oberhollenzer
If the tar header name is exactely 100 bytes long, it does not have a trailing null byte. Using strlen/strcpy on it effectively concatenates the following fields contents to it. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-01cleanup: split tar code up, remove some duplicationsDavid Oberhollenzer
This commit attempts to split some of the monolitic tar parsing code up into multiple functions in seperate files. Also, some code duplication (like reading a record into memory which was implemented twice) is removed. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-01Remove unused variable assignment from tar header writerDavid Oberhollenzer
Mainly to make scan-build happy. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-01Fix double free in GNU tar sparse file parserDavid Oberhollenzer
The intention was to free the temporary object in addition to the list. Since the temp pointer is also used for iterating the list, this resulted in a double free instead of the intended. This commit fixes the double free by replacing the recycled variable based list free with the helper function intended to do this. Bug found using scan-build. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-01Fix pax header parser to bail if parsing a number failsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-30Add support for gnu pax sparse file formats 0.1 and 1.0David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-30Add support for gnu pax sparse file format 0.0David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-30libtar: clarify actual size vs on-disk record sizeDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-30Add support for repacking condensed sparse filesDavid Oberhollenzer
This commit broadly does the following things: - Rename and move the sparse mapping structure to libutil - Add a function to the data writer for writing condensed versions of sparse files, given the mapping. - This shares code with the already existing function for regular files. The shared code is moved to a common helper function. - Add support to tar2sqfs for repacking sparse files. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-30tar reader: also store condensed size of sparse filesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-29Add support for reading old style GNU sparse tar file formatDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-29tar reader: propperly cleanup on failureDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-28Add basic support for the GNU tar formatDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-27Relax tar header parser to accept pre-posix formatsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-26Add support for negative timestamps in pax headerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-21fix: flipped conditional in tar header parserDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-19Split generic tar code off to static libraryDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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