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Full Discussion: Find out directory where command is located
Top Forums Shell Programming and Scripting Find out directory where command is located Post 302963561 by SkySmart on Sunday 3rd of January 2016 12:30:20 AM
Old 01-03-2016
Find out directory where command is located
so i have a script that i do not want copies of that script to be roaming around. i want that script to be in only one location on the filesystem, and whoever wants to use it should just link to it.

any idea on how to exit from a script if it is detected that the running version is a copy and not a link to the original??

my attempt so far:

Code:
#!/bin/sh
expectedDIR=/var/home/mon
actualdir=$(echo $0 | awk -F"/" '{print $1}')
if [ "${expectedDIR}" != "${actualdir}" ] ; then
echo "Running copies of this script is not allowed. please link to the original instead of copying!"
exit 2
fi

 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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