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Full Discussion: Access a File as a Device?
Top Forums UNIX for Advanced & Expert Users Access a File as a Device? Post 302623867 by jlliagre on Sunday 15th of April 2012 04:39:33 AM
Old 04-15-2012
No, unlike with sh, changing these /usr/bin utility would break too much third party existing scripts.

What is new with Solaris 11 is that the GNU version of these utilities are available in /usr/bin prefixed by "g", ex: /usr/bin/gawk, gsed, ggrep so if you need them, you can use their explicit name in scripts without clashing with the default ones.

Should you want to use existing scripts that expect these utilities to support Gnuisms without the "g" prefix, like most of what the Gnu/Linux community produce, you can simply prepend /usr/gnu/bin: to your PATH.

As with all modern Unixes (including Gnu/Linux), if you write portable POSIX scripts, you just need to run this command before launching the script:
Code:
PATH=$(getconf PATH)

or, in unknown environments:
Code:
PATH=$(PATH=/usr/sbin:/usr/bin:/sbin:/bin getconf PATH)

In such case, your shell scripts must have no shebang in the first line for themselves to be run by the POSIX compliant shell. Most people wrongly think #!/bin/sh is the correct way.
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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe name ... DESCRIPTION
The 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 /usr/bin/gdb'' it will create the following two files: -rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb -rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~ /usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are sure that /usr/bin/gdb works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) 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 gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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