NAME

zcmp - decompress and compare two files byte by byte

SYNOPSIS

zcmp [options] file1 [file2]

DESCRIPTION

Zcmp compares two files ('-' means standard input), and if they differ, tells the first byte and line number where they differ. Bytes and lines are numbered starting with 1. If any given file is compressed, its decompressed content is used. Compressed files are decompressed on the fly; no temporary files are created.

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

Zcmp compares file1 to file2. If file2 is omitted zcmp tries the following:

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

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

3. If no suitable file is found, compares file1 with data read from standard input.

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 given formats (bz2, gz, lz, xz)

-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

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 © 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.