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.TH ZDIFF 1 
.SH NAME 
zcmp, zdiff \- compare compressed files 
.SH SYNOPSIS 
.B zcmp 
[ cmp_options ] file1 
[ file2 ] 
.br 
.B zdiff 
[ diff_options ] file1 
[ file2 ] 
.SH DESCRIPTION 
.I  Zcmp 
and  
.I zdiff 
are used to invoke the 
.I cmp 
or the 
.I diff 
program on compressed files.  All options specified are passed directly to 
.I cmp 
or 
.IR diff "." 
If only 1 file is specified, then the files compared are 
.I file1 
and an uncompressed 
.IR file1 ".gz." 
If two files are specified, then they are uncompressed if necessary and fed to 
.I cmp 
or 
.IR diff "." 
The exit status from  
.I cmp 
or 
.I diff 
is preserved. 
.SH "SEE ALSO" 
cmp(1), diff(1), zmore(1), zgrep(1), znew(1), zforce(1), gzip(1), gzexe(1) 
.SH BUGS 
Messages from the 
.I cmp 
or 
.I diff 
programs refer to temporary filenames instead of those specified.