Linux bash know the script path which includes library script [duplicate]

Question

I have a library script named A and a script B, C which includes A with

. ../../../A

The problem is how A can know which time I run ./B.sh or ./C.sh, example:

if(run ./B.sh)
   echo "B (file path) is calling"
else
   echo "C (file path) is calling"

Lee Netherton · Accepted Answer · 2016-01-28 13:16:22Z

2

You can use $0 to determine the command that was executed:

A.sh:

echo $0

B.sh:

. ./A.sh

When run:

$ sh B.sh 
B.sh
$ sh A.sh 
A.sh

It will only give the command that was executed, not the arguments:

$ sh B.sh one two three
B.sh

edited Jan 28, 2016 at 13:16

answered Jan 28, 2016 at 13:13

Lee Netherton

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2 Comments

Pham Huu Bang Over a year ago

Thanks, it is the easiest way.

Lee Netherton Over a year ago

Be aware that using . ../../../A will only work relative to your current working directory. If you execute B.sh from another location the source built-in will fail. See stackoverflow.com/a/192305/341459 for a better way.

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