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9a9ea25f4a
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)
74 lines
2.1 KiB
Groff
74 lines
2.1 KiB
Groff
.\" $NetBSD: gzexe.1,v 1.3 2003/12/28 12:49:41 wiz Exp $
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.\" $OpenBSD: gzexe.1,v 1.1 2003/07/31 07:32:47 otto Exp $
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.\"
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.\" Copyright (c) 2003 Otto Moerbeek <otto@drijf.net>
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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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.\" $FreeBSD$
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.Dd January 26, 2007
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.Dt GZEXE 1
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.Os
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.Sh NAME
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.Nm gzexe
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.Nd create auto-decompressing executables
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.Sh SYNOPSIS
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.Nm gzexe
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.Op Fl d
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.Ar
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.Sh DESCRIPTION
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The
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.Nm
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utility uses
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.Xr gzip 1
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to compress executables, producing executables that decompress on-the-fly
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when executed.
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This saves disk space, at the cost of slower execution times.
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The original executables are saved by copying each of them to a file with
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the same name with a
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.Sq ~
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suffix appended.
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After verifying that the compressed executables work as expected, the backup
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files can be removed.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl d
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Decompress executables previously compressed by
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.Nm .
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.El
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.Pp
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The
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.Nm
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program refuses to compress non-regular or non-executable files,
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files with a setuid or setgid bit set, files that are already
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compressed using
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.Nm
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or programs it needs to perform on-the-fly decompression:
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.Xr sh 1 ,
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.Xr mktemp 1 ,
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.Xr rm 1 ,
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.Xr echo 1 ,
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.Xr tail 1 ,
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.Xr gzip 1 ,
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and
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.Xr chmod 1 .
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.Sh SEE ALSO
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.Xr gzip 1
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.Sh CAVEATS
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The
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.Nm
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utility replaces files by overwriting them with the generated
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compressed executable.
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To be able to do this, it is required that the original files are writable.
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