ZDIFF(1)

NAME
zcmp, zdiff - compare compressed files

SYNOPSIS
zcmp [options] file [file2]
zdiff [options] file [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 specified, 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)

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 (“-”)