ZDIFF(1)                   OpenBSD Reference Manual                   ZDIFF(1)

NAME
     zcmp, zdiff - compare compressed files

SYNOPSIS
     zcmp [options] file1 [file2]
     zdiff [options] file1 [file2]

DESCRIPTION
     zcmp and zdiff are filters that invoke cmp(1) or diff(1) respectively to
     compare compressed files.  Such files generally have a ``Z'' or ``gz''
     extension (both the compress(1) and gzip(1) formats are supported).  Any
     options that are specified are passed to cmp(1) or diff(1).

     If only file1 is specified, it is compared against a file with the same
     name, but with the extension removed.  When both file1 or file2 are spec-
     ified, either file may be compressed.

ENVIRONMENT
     TMPDIR  Directory in which to place temporary files.  If unset, /tmp is
             used.

FILES
     /tmp/zcmp.XXXXXXXXXX   Temporary file for zcmp.
     /tmp/zdiff.XXXXXXXXXX  Temporary file for zdiff.

SEE ALSO
     cmp(1), compress(1), diff(1), gzip(1)

CAVEATS
     zcmp and zdiff rely solely on the file extension to determine what is, or
     is not, a compressed file.  Consequently, the following are not supported
     as arguments:

           -   directories
           -   device special files
           -   filenames indicating the standard input (`-')

OpenBSD 4.7                      May 31, 2007                                1
