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Annotation of src/usr.bin/gzip/gzexe.1, Revision 1.3

1.3     ! wiz         1: .\"    $NetBSD: gzexe.1,v 1.2 2003/12/28 12:43:43 wiz Exp $
1.1       mrg         2: .\"    $OpenBSD: gzexe.1,v 1.1 2003/07/31 07:32:47 otto Exp $
                      3: .\"
                      4: .\" Copyright (c) 2003 Otto Moerbeek <otto@drijf.net>
                      5: .\"
                      6: .\" Permission to use, copy, modify, and distribute this software for any
                      7: .\" purpose with or without fee is hereby granted, provided that the above
                      8: .\" copyright notice and this permission notice appear in all copies.
                      9: .\"
                     10: .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11: .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12: .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13: .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14: .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15: .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16: .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17: .\"
                     18: .Dd July 30, 2003
                     19: .Dt GZEXE 1
                     20: .Os
                     21: .Sh NAME
                     22: .Nm gzexe
                     23: .Nd create auto-decompressing executables
                     24: .Sh SYNOPSIS
                     25: .Nm gzexe
                     26: .Op Fl d
                     27: .Ar
                     28: .Sh DESCRIPTION
                     29: The
                     30: .Nm
                     31: utility uses
                     32: .Xr gzip 1
                     33: to compress executables, producing executables that decompress on-the-fly
                     34: when executed.
                     35: This saves disk space, at the cost of slower execution times.
                     36: The original executables are saved by copying each of them to a file with
                     37: the same name with a
                     38: .Sq ~
                     39: suffix appended.
                     40: After verifying that the compressed executables work as expected, the backup
                     41: files can be removed.
                     42: .Pp
                     43: The options are as follows:
                     44: .Bl -tag -width Ds
                     45: .It Fl d
                     46: Decompress executables previously compressed by
1.3     ! wiz        47: .Nm .
1.1       mrg        48: .El
                     49: .Pp
                     50: The
                     51: .Nm
                     52: program refuses to compress non-regular or non-executable files,
                     53: files with a setuid or setgid bit set, files that are already
                     54: compressed using
                     55: .Nm
                     56: or programs it needs to perform on-the-fly decompression:
                     57: .Xr sh 1 ,
                     58: .Xr mktemp 1 ,
                     59: .Xr rm 1 ,
                     60: .Xr echo 1 ,
                     61: .Xr tail 1 ,
1.3     ! wiz        62: .Xr gzip 1 ,
1.1       mrg        63: and
                     64: .Xr chmod 1 .
                     65: .Sh SEE ALSO
                     66: .Xr gzip 1
                     67: .Sh CAVEATS
                     68: The
                     69: .Nm
                     70: utility replaces files by overwriting them with the generated
                     71: compressed executable.
                     72: To be able to do this, it is required that the original files are writable.