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freebsd-dev/usr.bin/gzip/zdiff.1

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Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. MFC after: 2 weeks
2011-05-23 09:02:44 +00:00
.\" $NetBSD: zdiff.1,v 1.5 2010/04/14 19:52:05 wiz Exp $
Replace the GNU gzip with a slightly modified NetBSD gzip. The NetBSD version is a feature-to-feature re-implementation of GNU gzip using the freely-redistributable zlib and this version is expected to be mostly bug-to-bug compatible with the GNU implementation. - Because this is a piece of mature code and we want to make changes so it is added directly rather than importing to src/contrib. - Connect newly added code to src/usr.bin/ and rescue/rescue build. - Disconnect the GNU gzip code from build for now, they will be eventually removed completely. - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and WITHOUT_BZIP2. Tested by: kris (full exp-7 pointyhat build) Approved by: core (importing a 4-clause BSD licensed file) Approved by: re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00
.\" $OpenBSD: zdiff.1,v 1.2 2003/07/13 17:39:14 millert Exp $
.\"
.\" Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. MFC after: 2 weeks
2011-05-23 09:02:44 +00:00
.\" Copyright (c) 2010 Joerg Sonnenberger <joerg@NetBSD.org>
Replace the GNU gzip with a slightly modified NetBSD gzip. The NetBSD version is a feature-to-feature re-implementation of GNU gzip using the freely-redistributable zlib and this version is expected to be mostly bug-to-bug compatible with the GNU implementation. - Because this is a piece of mature code and we want to make changes so it is added directly rather than importing to src/contrib. - Connect newly added code to src/usr.bin/ and rescue/rescue build. - Disconnect the GNU gzip code from build for now, they will be eventually removed completely. - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and WITHOUT_BZIP2. Tested by: kris (full exp-7 pointyhat build) Approved by: core (importing a 4-clause BSD licensed file) Approved by: re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.\" Sponsored in part by the Defense Advanced Research Projects
.\" Agency (DARPA) and Air Force Research Laboratory, Air Force
.\" Materiel Command, USAF, under agreement number F39502-99-1-0512.
.\"
.\" $FreeBSD$
Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. MFC after: 2 weeks
2011-05-23 09:02:44 +00:00
.Dd May 23, 2011
Replace the GNU gzip with a slightly modified NetBSD gzip. The NetBSD version is a feature-to-feature re-implementation of GNU gzip using the freely-redistributable zlib and this version is expected to be mostly bug-to-bug compatible with the GNU implementation. - Because this is a piece of mature code and we want to make changes so it is added directly rather than importing to src/contrib. - Connect newly added code to src/usr.bin/ and rescue/rescue build. - Disconnect the GNU gzip code from build for now, they will be eventually removed completely. - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and WITHOUT_BZIP2. Tested by: kris (full exp-7 pointyhat build) Approved by: core (importing a 4-clause BSD licensed file) Approved by: re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00
.Dt ZDIFF 1
.Os
.Sh NAME
.Nm zcmp ,
.Nm zdiff
.Nd compare compressed files
.Sh SYNOPSIS
.Nm zcmp
.Op Ar options
.Ar file
.Op Ar file2
.Nm zdiff
.Op Ar options
.Ar file
.Op Ar file2
.Sh DESCRIPTION
.Nm zcmp
and
.Nm zdiff
are filters that invoke
.Xr cmp 1
or
.Xr diff 1
respectively to compare compressed files.
Any
.Ar options
that are specified are passed to
.Xr cmp 1
or
.Xr diff 1 .
.Pp
If only
.Ar file1
is specified, it is compared against a file with the same name, but
with the extension removed.
When both
.Ar file1
or
.Ar file2
are specified, either file may be compressed.
Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. MFC after: 2 weeks
2011-05-23 09:02:44 +00:00
.Pp
Extensions handled by
.Xr gzip 1 :
.Bl -bullet -compact
.It
z, Z,
.It
gz,
.It
taz,
.It
tgz.
.El
.Pp
Extensions handled by
.Xr bzip2 1 :
.Bl -bullet -compact
.It
bz,
.It
bz2,
.It
tbz,
.It
tbz2.
.El
.Pp
Extensions handled by
.Xr xz 1 :
.Bl -bullet -compact
.It
lzma,
.It
xz,
.It
tlz,
.It
txz.
.El
Replace the GNU gzip with a slightly modified NetBSD gzip. The NetBSD version is a feature-to-feature re-implementation of GNU gzip using the freely-redistributable zlib and this version is expected to be mostly bug-to-bug compatible with the GNU implementation. - Because this is a piece of mature code and we want to make changes so it is added directly rather than importing to src/contrib. - Connect newly added code to src/usr.bin/ and rescue/rescue build. - Disconnect the GNU gzip code from build for now, they will be eventually removed completely. - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and WITHOUT_BZIP2. Tested by: kris (full exp-7 pointyhat build) Approved by: core (importing a 4-clause BSD licensed file) Approved by: re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00
.Sh ENVIRONMENT
.Bl -tag -width "TMPDIR"
.It Ev TMPDIR
Directory in which to place temporary files.
If unset,
.Pa /tmp
is used.
.El
.Sh FILES
.Bl -tag -width "/tmp/zdiff.XXXXXXXXXX" -compact
.It Pa /tmp/zcmp.XXXXXXXXXX
Temporary file for
.Nm zcmp .
.It Pa /tmp/zdiff.XXXXXXXXXX
Temporary file for
.Nm zdiff .
.El
.Sh SEE ALSO
Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. MFC after: 2 weeks
2011-05-23 09:02:44 +00:00
.Xr bzip2 1 ,
Replace the GNU gzip with a slightly modified NetBSD gzip. The NetBSD version is a feature-to-feature re-implementation of GNU gzip using the freely-redistributable zlib and this version is expected to be mostly bug-to-bug compatible with the GNU implementation. - Because this is a piece of mature code and we want to make changes so it is added directly rather than importing to src/contrib. - Connect newly added code to src/usr.bin/ and rescue/rescue build. - Disconnect the GNU gzip code from build for now, they will be eventually removed completely. - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and WITHOUT_BZIP2. Tested by: kris (full exp-7 pointyhat build) Approved by: core (importing a 4-clause BSD licensed file) Approved by: re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00
.Xr cmp 1 ,
Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. MFC after: 2 weeks
2011-05-23 09:02:44 +00:00
.Xr diff 1 ,
.Xr gzip 1 ,
.Xr xz 1
Replace the GNU gzip with a slightly modified NetBSD gzip. The NetBSD version is a feature-to-feature re-implementation of GNU gzip using the freely-redistributable zlib and this version is expected to be mostly bug-to-bug compatible with the GNU implementation. - Because this is a piece of mature code and we want to make changes so it is added directly rather than importing to src/contrib. - Connect newly added code to src/usr.bin/ and rescue/rescue build. - Disconnect the GNU gzip code from build for now, they will be eventually removed completely. - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and WITHOUT_BZIP2. Tested by: kris (full exp-7 pointyhat build) Approved by: core (importing a 4-clause BSD licensed file) Approved by: re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00
.Sh CAVEATS
.Nm zcmp
and
.Nm 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:
.Bl -dash
.It
directories
.It
device special files
.It
filenames indicating the standard input
.Pq Dq \-
.El
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