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ZCMP(1)				 User Commands			       ZCMP(1)

NAME
       zcmp - decompress and compare two files byte by byte

SYNOPSIS
       zcmp [options] file1 [file2]

DESCRIPTION
       zcmp  compares two files	and, if	they differ, writes to standard	output
       the first byte and line number where they differ. Bytes and  lines  are
       numbered	 starting  with	 1. A hyphen '-' used as a file	argument means
       standard	input.	If any file given is compressed, its decompressed con-
       tent  is	 used. Compressed files	are decompressed on the	fly; no	tempo-
       rary files are created.

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

       zcmp compares file1 to file2. The standard input	is used	only if	 file1
       or  file2  refers to standard input. If file2 is	omitted	zcmp tries the
       following:

	      -	If file1 is compressed,	 compares  its	decompressed  contents
	      with the corresponding uncompressed file (the name of file1 with
	      the extension removed).

	      -	If file1 is uncompressed, compares it  with  the  decompressed
	      contents	of  file1.[lz|bz2|gz|zst|xz]  (the  first  one that is
	      found).

       Exit status is 0	if inputs are identical, 1 if different, 2 if trouble.

OPTIONS
       -h, --help
	      display this help	and exit

       -V, --version
	      output version information and exit

       -b, --print-bytes
	      print differing bytes

       -i, --ignore-initial=<n>[:<n2>]
	      ignore differences in the	first <n> bytes

       -l, --list
	      list position, value of all differing bytes

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

       -n, --bytes=<n>
	      compare at most <n> bytes

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

       -O, --force-format=[<f1>][,<f2>]
	      force the	formats	given (bz2,gz,lz,xz,zst)

       -q, --quiet
	      suppress all messages

       -s, --silent
	      (same as --quiet)

       -v, --verbose
	      verbose mode (same as --list)

       --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

       --zst=<command>
	      set compressor and options for zstd format

       Numbers may be followed by a multiplier:	k = kB = 10^3 =	1000, Ki = KiB
       = 2^10 =	1024, M	= 10^6,	Mi = 2^20, G = 10^9, Gi	= 2^30,	etc...

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

COPYRIGHT
       Copyright  (C) 2022 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.

SEE ALSO
       The  full documentation for zcmp	is maintained as a Texinfo manual.  If
       the info	and zcmp programs are properly installed  at  your  site,  the
       command

	      info zutils

       should give you access to the complete manual.

zutils 1.11			 January 2022			       ZCMP(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | REPORTING BUGS | COPYRIGHT | SEE ALSO

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