zdiff - decompress and compare two files line by line
zdiff [options] file1 [file2]
Zdiff compares two files ("-" means standard input), and if they
differ, shows the differences line by line. If any given file is
compressed, its decompressed content is used. Zdiff is a front end to
the diff program and has the limitation that messages from diff refer
to temporary filenames instead of those specified.
The supported formats are bzip2, gzip, lzip and xz.
Compares <file1> to <file2>. If <file2> is omitted zdiff tries the
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
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.
display this help and exit
output version information and exit
treat all files as text
ignore changes in the amount of white space
ignore changes whose lines are all blank
-c use the context output format
same as -c but use <n> lines of context
try hard to find a smaller set of changes
ignore changes due to tab expansion
force given formats (bz2, gz, lz, xz)
ignore case differences in file contents
don't read runtime configuration file
show which C function each change is in
output only whether files differ
report when two files are identical
expand tabs to spaces in output
make tabs line up by prepending a tab
-u use the unified output format
same as -u but use <n> lines of context
ignore all white space
set compressor and options for bzip2 format
set compressor and options for gzip format
set compressor and options for lzip format
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...
Report bugs to firstname.lastname@example.org
Zutils home page: http://www.nongnu.org/zutils/zutils.php
Copyright © 2014 Antonio Diaz Diaz. License GPLv2+: GNU GPL version 2
or later <http://gnu.org/licenses/gpl.php>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.