How to:? Need affinity of a sourced shell script to the calling script

Lsatenstein · 02-04-2015, 11:21 AM

Here is a scenario.

/usr/local/bin/collect.sh contains two shell scripts, collect.sh and soxsetup.sh

my home directory ~/bin contains testing versions of collect.sh and soxsetup.sh and point
to different locations

In both cases I want collect.sh to source the soxsetup.sh script that is in the same directory containing collect.sh

Test

So, regular use
I want always use the two scripts from /usr/local/bin
testing use
I want always that the two scripts execute from ~/bin

It does not always work. Different results for different working directories (pwd)
I tested with some bash commands vis...
which, dirname, realpath calling bash -x collect.sh from either home ~/bin or /usr/local/bin

In some cases the wrong soxsetup.sh gets invoked. I want to avoid that problem.

If you can help, please test with bash -x from ~ , ~/bin /usr/local/bin

Hints are important.

Herein is my test script

Code:

#!/bin/bash
#
SOXBIN=`dirname $0`		
echo "SOXBIN=$SOXBIN" 
#
if [ $SOXBIN == '.' ]; then
echo "executing from `pwd`"
SOXBIN=`pwd`
fi
echo "$SOXBIN/soxsetup.sh $1 $2"
. $SOXBIN/soxsetup.sh $1 $2

I tried the above with just
test1
/usr/local/bin/test1
cd /usr/local/bin ; ./test1

cd ~ ; bin/test1
cd ~/bin ; ./test1

I do software work in Baan ERP systems

pan64 · 02-05-2015, 03:53 AM

I do not really understand your problem, but probably readlink -m can help you

michaelk · 02-05-2015, 07:05 AM

$0 returns the name of the program as it was called.

I assume that /usr/local/bin is in your path environment but have you also added ~/bin?

Unlike windows the current working directory path i.e . is not by default in the users path environment.

If you execute test1 from any directory it should return /usr/local/bin since that is in the path environment. The same will be returned if you use the entire path i.e. /usr/local/bin/test1 to execute your script.

./test1 will always return . no matter what since that is how the program was called.

~ is a short cut for /home/username. Therefore ~/bin/test1 should always return /home/username/bin

If your ~/bin is your path environment then it depends on how the path is searched as to which test1 actually executes which is why adding the current working directory is discouraged.