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test script to identify SHELL

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# 8  
Old 08-26-2009

Why do you need to know what shell it is?

It is better to test for the features you want.

You can check for variables $BASH_VERSION and $KSH_VERSION (the latter only in pdksh).
# 9  
Old 08-26-2009
Code:
#!/bin/sh

pid="$$"
echo "myShell->[`ps -o 'pid,comm' -p "${pid}" | nawk 'FNR==2{print $2}'`]"

YMMV - not generic
Last edited by vgersh99; 08-26-2009 at 01:30 PM..
# 10  
Old 08-26-2009

Using any standard version of ps (and no other external command) in any Bourne-type shell:

Code:
ps -o comm -p "$$" | { read; read comm; echo "$comm"; }

However, that doesn't necessarily tell you anything about the shell, particularly if it's sh.
# 11  
Old 08-26-2009
I don't think that $SHELL is the right variable to test. Anyway, on a point of syntax the "==" is not valid in "test" when it is not bash.
cfajohnson approach to find a suitable variable which is only set by that shell is better. Use "if [ -z "${SUITABLE_VARIABLE}" ] .
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