NAME

       ztest - verify the integrity of compressed files

SYNOPSIS

       ztest [options] [files]

DESCRIPTION

       Ztest  verifies  the  integrity  of the specified compressed files.  Uncompressed files are ignored. If a
       file is specified as '-', the integrity of compressed data read from standard  input  is  verified.  Data
       read from standard input must be all in the same compression format.

       If  no  files  are  specified, recursive searches examine the current working directory, and nonrecursive
       searches read standard input.

       The formats supported are bzip2, gzip, lzip and xz.

       Note that error detection in the xz format is broken. First, some xz files  lack  integrity  information.
       Second, not all xz decompressors can verify the integrity of all xz files. Third, section 2.1.1.2 'Stream
       Flags'  of  the xz format specification allows xz decompressors to produce garbage output without issuing
       any warning. Therefore, xz files can't always be verified as reliably as files in the other formats can.

       Exit status is 0 if all compressed files verify OK, 1 if environmental problems (file not found,  invalid
       flags, I/O errors, etc), 2 if any compressed file is corrupt or invalid.

OPTIONS

       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       -M, --format=<list>
              process only the formats in <list>

       -N, --no-rcfile
              don't read runtime configuration file

       -O, --force-format=<fmt>
              force given format (bz2, gz, lz, xz)

       -q, --quiet
              suppress all messages

       -r, --recursive
              operate recursively on directories

       -R, --dereference-recursive
              recursively follow symbolic links

       -v, --verbose
              be verbose (a 2nd -v gives more)

       --bz2=<command>
              set compressor and options for bzip2 format

       --gz=<command>
              set compressor and options for gzip format

       --lz=<command>
              set compressor and options for lzip format

       --xz=<command>
              set compressor and options for xz format

REPORTING BUGS

       Report bugs to zutils-bug@nongnu.org
       Zutils home page: http://www.nongnu.org/zutils/zutils.html

COPYRIGHT

       Copyright   ©   2019   Antonio   Diaz   Diaz.    License   GPLv2+:   GNU   GPL   version   2   or   later
       <http://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.

ztest (zutils) 1.8                                January 2019                                          ZTEST(1)