Reference

zdiff(1)

compare compressed files

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 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), 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 (‘-’)

History

-# until OpenBSD 2.4; --ascii until OpenBSD 2.4; --best until OpenBSD 2.4; --decompress until OpenBSD 2.4; --fast until OpenBSD 2.4; --force until OpenBSD 2.4; --help until OpenBSD 2.4; --license until OpenBSD 2.4; --list until OpenBSD 2.4; --name until OpenBSD 2.4; --no-name until OpenBSD 2.4; --quiet until OpenBSD 2.4; --recursive until OpenBSD 2.4; --stdout until OpenBSD 2.4; --suffix until OpenBSD 2.4; --test until OpenBSD 2.4; --to-stdout until OpenBSD 2.4; --uncompress until OpenBSD 2.4; --verbose until OpenBSD 2.4; --version until OpenBSD 2.4; -L until OpenBSD 2.4; -N until OpenBSD 2.4; -S until OpenBSD 2.4; -V until OpenBSD 2.4; -a until OpenBSD 2.4; -c until OpenBSD 2.4; -d until OpenBSD 2.4; -f until OpenBSD 2.4; -h until OpenBSD 2.4; -l until OpenBSD 2.4; -n until OpenBSD 2.4; -q until OpenBSD 2.4; -r until OpenBSD 2.4; -t until OpenBSD 2.4; -v until OpenBSD 2.4.