1.\" $NetBSD: zdiff.1,v 1.2 2003/12/28 12:43:43 wiz Exp $ 2.\" $OpenBSD: zdiff.1,v 1.2 2003/07/13 17:39:14 millert Exp $ 3.\" $DragonFly: src/usr.bin/gzip/zdiff.1,v 1.1 2004/10/26 11:19:31 joerg Exp $ 4.\" 5.\" Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com> 6.\" 7.\" Permission to use, copy, modify, and distribute this software for any 8.\" purpose with or without fee is hereby granted, provided that the above 9.\" copyright notice and this permission notice appear in all copies. 10.\" 11.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18.\" 19.\" Sponsored in part by the Defense Advanced Research Projects 20.\" Agency (DARPA) and Air Force Research Laboratory, Air Force 21.\" Materiel Command, USAF, under agreement number F39502-99-1-0512. 22.\" 23.Dd June 23, 2003 24.Dt ZDIFF 1 25.Os 26.Sh NAME 27.Nm zcmp , 28.Nm zdiff 29.Nd compare compressed files 30.Sh SYNOPSIS 31.Nm zcmp 32.Op Ar options 33.Ar file 34.Op Ar file2 35.Nm zdiff 36.Op Ar options 37.Ar file 38.Op Ar file2 39.Sh DESCRIPTION 40.Nm zcmp 41and 42.Nm zdiff 43are filters that invoke 44.Xr cmp 1 45or 46.Xr diff 1 47respectively to compare compressed files. 48Such files generally have a 49.Dq Z 50or 51.Dq gz 52extension (both the 53.Xr compress 1 54and 55.Xr gzip 1 56formats are supported). 57Any 58.Ar options 59that are specified are passed to 60.Xr cmp 1 61or 62.Xr diff 1 . 63.Pp 64If only 65.Ar file1 66is specified, it is compared against a file with the same name, but 67with the extension removed. 68When both 69.Ar file1 70or 71.Ar file2 72are specified, either file may be compressed. 73.Sh ENVIRONMENT 74.Bl -tag -width "TMPDIR" 75.It Ev TMPDIR 76Directory in which to place temporary files. 77If unset, 78.Pa /tmp 79is used. 80.El 81.Sh FILES 82.Bl -tag -width "/tmp/zdiff.XXXXXXXXXX" -compact 83.It Pa /tmp/zcmp.XXXXXXXXXX 84Temporary file for 85.Nm zcmp . 86.It Pa /tmp/zdiff.XXXXXXXXXX 87Temporary file for 88.Nm zdiff . 89.El 90.Sh SEE ALSO 91.Xr cmp 1 , 92.Xr diff 1 , 93.Xr gzip 1 94.Sh CAVEATS 95.Nm zcmp 96and 97.Nm zdiff 98rely solely on the file extension to determine what is, or is not, 99a compressed file. 100Consequently, the following are not supported as arguments: 101.Bl -dash 102.It 103directories 104.It 105device special files 106.It 107filenames indicating the standard input 108.Pq Dq \- 109.El 110