NAME

       sqfsdiff - compare two squashfs images by contents and metadata

SYNOPSIS

       sqfsdiff [OPTIONS...] --old <first> --new <second>

DESCRIPTION

       Compare  two  squashfs images. In contrast to doing a direct diff of the images, this actually parses the
       filesystems and generates a more meaningful difference report.

       If only contents are compared, any differences in packed file layout, ordering, compression,  inode  meta
       data  and  so  on  is ignored and the two images are considered equal if each directory contains the same
       entries, symlink with the same paths have the same targets, device nodes the same device number and files
       the same size and contents.

       A  report  of  any  difference  is printed to stdout. The exit status is similar that of diff(1): 0 means
       equal, 1 means different, 2 means problem.

       Possible options:

       --old, -a <first>
              Specify the first filesystem  image  or  source  directory,  relativ  to  which  the  changes  are
              evaluated.

       --new, -b <second>
              Specify the second filesystem image to source directory to compare to the first one.

       --no-contents, -C
              Do not compare file contents.

       --no-owner, -O
              Do not compare file owners.

       --no-permissions, -P
              Do not compare permission bits.

       --timestamps, -T
              Compare file timestamps.

       --inode-num, -I
              Compare inode numbers of all files.

       --super, -S
              Also compare meta data in super blocks.

       --extract, -e <path>
              Extract  files  that  exist in both images but have different contents to the specified directory.
              Contents of the first image end up in a sub directory named old and the  contents  of  the  second
              image in a sub directory named new.

       --help, -h
              Print help text and exit.

       --version, -V
              Print version information and exit.

EXIT STATUS

       The exit status is similar that of diff(1): 0 means equal, 1 means different, 2 means problem.

SEE ALSO

       rdsquashfs(1), sqfs2tar(1)

AUTHOR

       Written by David Oberhollenzer.

COPYRIGHT

       Copyright   ©   2019   David   Oberhollenzer   et   al  License  GPLv3+:  GNU  GPL  version  3  or  later
       <https://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to  the  extent
       permitted by law.