KSH - Sourced file location - Page 2

cfajohnson · #1 (**permalink**) 07-01-2009

Quote:

Originally Posted by Al262

The sample scripts below, I am looking for the location of the sourced b.sh file.

Why? There is rarely a good reason for doing that.

Quote:

The b.sh file is source by multiple files, so it is not feasible to rely on a "global" variable or passed argument.

Why do you need to rely on anything? Put the script in a directory that is in your $PATH.

Quote:

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`

There's no need for an external command:
Code:
ScriptDir=${0%/*}

Al262 · #2 (**permalink**) 07-02-2009

The script is untouched as it migrates throught the life cycle regions with various file sub-systems, such as /common/dev, /common/test, and so on. Specific applications /app1 or /app2 will be invoked from an external scheduler using a parameter. So with in the /app1 script, they run $1/setCommonEnv.sh where $1 is /common/dev or /common/test ...

Within setCommonEnv.sh, i would like to derive which environment I am in, as well as which script or subscript.

Seems very reasonable to be able to walk a call stack.

fpmurphy · #3 (**permalink**) 07-02-2009

If you are using ksh93 it can be easily done using the .sh.file builtin parameter

Code:

$ cat a.sh
#!/bin/ksh93

echo "a: $PWD"

. ./ksh93/b.sh
$

Code:

$cat ksh93/b.sh
#!/bin/ksh93

echo "b: $PWD"
echo "b: ${.sh.file}"
echo "b: ${.sh.file##*/}"
echo "b: ${.sh.file%/*}"
$

Code:

$ ./a.sh
a: /home/fpm
b: /home/fpm
b: /home/fpm/ksh93/b.sh
b: b.sh
b: /home/fpm/ksh93
$

Al262 · #4 (**permalink**) 07-02-2009

Exactly what I am looking for. However, the scripts are not running ksh93. I did run through a test cycle here on AIX 5.3, the results are below.

Code:

 
/test> cat a.sh
#!/bin/ksh93
echo "a: $0"
echo "a: $PWD"
ScriptDir=`dirname $0`
. ./sub/b.sh
/test> cat sub/b.sh
#!/bin/ksh93
echo "b: $PWD"
echo "b: ${.sh.file}"
echo "b: ${.sh.file##*/}"
echo "b: ${.sh.file%/*}"
/test> ./a.sh
a: ./a.sh
a: /test
b: /test
b:
b:
b:
/test>

Thanks for the time and response.

vgersh99 · #5 (**permalink**) 07-02-2009

looks like the '.sh.file' is not implemented on AIX's version of ksh93 (among others).

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