KSH - Sourced file location

Al262 · #1 (**permalink**) 07-01-2009

The sample scripts below, I am looking for the location of the sourced b.sh file. The b.sh file is source by multiple files, so it is not feasible to rely on a "global" variable or passed argument. Is there any way to determine the location of b.sh within b.sh?

a.sh

Code:

 
#!/bin/ksh
echo "a: <$0>"
ScriptDir=`dirname $0`
. ${ScriptDir}/b.sh

b.sh

Code:

 
#!/bin/ksh
WhereAmI="????"
echo "b: <$0> ${WhereAmI}"

vgersh99 · #2 (**permalink**) 07-01-2009

b.sh

Code:

#!/bin/ksh

thisFILE="$(whence ${0})"
thisDIR="$(dirname ${thisFILE})"
PROGNAME="${0##*/}"

WhereAmI="${thisDIR}"
echo "b: <${PROGNAME}> ${WhereAmI}"

Note: this works if a.sh and b.sh reside in the same direct. If b.sh is somewhere else, it returns a.sh location (and rightfully so). Need to think about that.

Al262 · #3 (**permalink**) 07-01-2009

Thanks for the response, but as you indicate at the end of your post, it only works when a and b are in the same directory. My useCase has to address the notion that a is in a different directory and not necessarily always a.

The useCase is that /app1/a.sh sources /common/b.sh
/app2/c.sh sources /common/b.sh

I need b.sh to know that he is in the common directory.

vgersh99 · #4 (**permalink**) 07-01-2009

this lnk might be helpful....
Bit I could not make it work with bash/ksh on Solaris....
Maybe others will have better ideas.

Al262 · #5 (**permalink**) 07-01-2009

Not really much help. The link tried to provide workarounds rather than answering the question. There are times when inside the script, it doesn't know what directory it is in. Seems like a $0 equivalent should be available for a sourced file.

vgersh99 · #6 (**permalink**) 07-01-2009

Quote:

Originally Posted by Al262

Not really much help. The link tried to provide workarounds rather than answering the question. There are times when inside the script, it doesn't know what directory it is in. Seems like a $0 equivalent should be available for a sourced file.

You'd think , huh?
But it ($0 in the sourced shell) is not what what it's in the 'called' (not sourced) script - as the 'sourced' script runs in the same process space (there's no newly forked process) as the 'sourcing' script. Therefore, the '$0' in the sourced script is the '$0' of the sourcing script.

I'm not sure if I'm explaining this correctly - you can take a look at this thread or browse this comp.unix.shell user group for similar threads.

Al262 · #7 (**permalink**) 07-01-2009

Understand it completely.

Again, I was looking (hoping) for a $0 equivalent for the sourced file. I realize the $0 is the invoked script.

Thanks for the reponses, hopefully someone will provide some insight.

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Bash copy file contents into an existing file at a specific location	gshepherd7	Shell Programming and Scripting	6	03-11-2009 09:26 AM
Exit from sourced script	angad.makkar	Shell Programming and Scripting	2	03-04-2009 06:35 AM
copy files from one location to similar location	pharos467	UNIX for Advanced & Expert Users	1	09-21-2008 12:21 PM
which file is sourced by bash on login (Mac OS X 10.5.3)?	Alex_Land	OS X (Apple)	2	07-11-2008 10:52 PM
What is the file location?	Chanakya.m	Shell Programming and Scripting	5	07-17-2006 12:42 AM

Bits Awarded / Charged to vgersh99 for this Post
Date	User	Comment	Amount
07-01-2009	Anonymous	N/A	1

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread: