mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
44 lines
1.3 KiB
Groff
44 lines
1.3 KiB
Groff
.TH GZEXE 1
|
|
.SH NAME
|
|
gzexe \- compress executable files in place
|
|
.SH SYNOPSIS
|
|
.B gzexe
|
|
[ name ... ]
|
|
.SH DESCRIPTION
|
|
The
|
|
.I gzexe
|
|
utility allows you to compress executables in place and have them
|
|
automatically uncompress and execute when you run them (at a penalty
|
|
in performance). For example if you execute ``gzexe /bin/cat'' it
|
|
will create the following two files:
|
|
.nf
|
|
.br
|
|
-r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat
|
|
-r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~
|
|
.fi
|
|
/bin/cat~ is the original file and /bin/cat is the self-uncompressing
|
|
executable file. You can remove /bin/cat~ once you are sure that
|
|
/bin/cat works properly.
|
|
.PP
|
|
This utility is most useful on systems with very small disks.
|
|
.SH OPTIONS
|
|
.TP
|
|
.B \-d
|
|
Decompress the given executables instead of compressing them.
|
|
.SH "SEE ALSO"
|
|
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1)
|
|
.SH CAVEATS
|
|
The compressed executable is a shell script. This may create some
|
|
security holes. In particular, the compressed executable relies
|
|
on the PATH environment variable to find
|
|
.I gzip
|
|
and some other utilities
|
|
.I (tail, chmod, ln, sleep).
|
|
.SH "BUGS"
|
|
.I gzexe
|
|
attempts to retain the original file attributes on the compressed executable,
|
|
but you may have to fix them manually in some cases, using
|
|
.I chmod
|
|
or
|
|
.I chown.
|