2003-12-28 15:48:03 +03:00
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.\" $NetBSD: zdiff.1,v 1.3 2003/12/28 12:48:03 wiz Exp $
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2003-12-28 15:31:55 +03:00
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.\" $OpenBSD: zdiff.1,v 1.2 2003/07/13 17:39:14 millert Exp $
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.\"
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.\" Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.\" Sponsored in part by the Defense Advanced Research Projects
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.\" Agency (DARPA) and Air Force Research Laboratory, Air Force
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.\" Materiel Command, USAF, under agreement number F39502-99-1-0512.
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.\"
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.Dd June 23, 2003
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.Dt ZDIFF 1
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.Os
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.Sh NAME
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.Nm zcmp ,
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.Nm zdiff
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.Nd compare compressed files
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.Sh SYNOPSIS
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.Nm zcmp
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.Op Ar options
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.Ar file
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.Op Ar file2
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.Nm zdiff
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.Op Ar options
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.Ar file
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.Op Ar file2
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.Sh DESCRIPTION
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.Nm zcmp
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and
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.Nm zdiff
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are filters that invoke
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.Xr cmp 1
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or
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.Xr diff 1
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respectively to compare compressed files.
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Such files generally have a
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.Dq Z
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or
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.Dq gz
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extension (both the
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.Xr compress 1
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and
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.Xr gzip 1
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formats are supported).
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Any
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.Ar options
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that are specified are passed to
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.Xr cmp 1
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or
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.Xr diff 1 .
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.Pp
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If only
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.Ar file1
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is specified, it is compared against a file with the same name, but
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with the extension removed.
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When both
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.Ar file1
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or
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.Ar file2
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are specified, either file may be compressed.
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.Sh ENVIRONMENT
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.Bl -tag -width "TMPDIR"
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.It Ev TMPDIR
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Directory in which to place temporary files.
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If unset,
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.Pa /tmp
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is used.
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.El
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.Sh FILES
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.Bl -tag -width "/tmp/zdiff.XXXXXXXXXX" -compact
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.It Pa /tmp/zcmp.XXXXXXXXXX
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Temporary file for
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.Nm zcmp .
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.It Pa /tmp/zdiff.XXXXXXXXXX
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Temporary file for
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.Nm zdiff .
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.El
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.Sh SEE ALSO
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.Xr cmp 1 ,
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.Xr compress 1 ,
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.Xr diff 1
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.Sh CAVEATS
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.Nm zcmp
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and
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.Nm zdiff
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rely solely on the file extension to determine what is, or is not,
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a compressed file.
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Consequently, the following are not supported as arguments:
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.Bl -dash
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.It
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directories
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.It
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device special files
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.It
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2003-12-28 15:48:03 +03:00
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filenames indicating the standard input
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.Pq Dq \-
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2003-12-28 15:31:55 +03:00
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.El
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