1.\" $NetBSD: gzexe.1,v 1.3 2003/12/28 12:49:41 wiz Exp $ 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 29The 30.Nm 31utility uses 32.Xr gzip 1 33to compress executables, producing executables that decompress on-the-fly 34when executed. 35This saves disk space, at the cost of slower execution times. 36The original executables are saved by copying each of them to a file with 37the same name with a 38.Sq ~ 39suffix appended. 40After verifying that the compressed executables work as expected, the backup 41files can be removed. 42.Pp 43The options are as follows: 44.Bl -tag -width Ds 45.It Fl d 46Decompress executables previously compressed by 47.Nm . 48.El 49.Pp 50The 51.Nm 52program refuses to compress non-regular or non-executable files, 53files with a setuid or setgid bit set, files that are already 54compressed using 55.Nm 56or 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 , 62.Xr gzip 1 , 63and 64.Xr chmod 1 . 65.Sh SEE ALSO 66.Xr gzip 1 67.Sh CAVEATS 68The 69.Nm 70utility replaces files by overwriting them with the generated 71compressed executable. 72To be able to do this, it is required that the original files are writable. 73