topic Re: about shell in Operating System - HP-UX

about shell

leyearn — Wed, 04 Feb 2004 00:57:11 GMT

as we know
the default shell in hpux is posix shell
under the default shell
i enter the ksh
#ksh
but how can i know which shell i am under whenever?

Re: about shell

Hein van den Heuvel — Wed, 04 Feb 2004 01:03:38 GMT

Is it? I naively thought it was whatever you set up in /etc/passwd

Anyway... how about: echo $SHELL

or: env | grep SHELL

Hein.

Re: about shell

Steven E. Protter — Wed, 04 Feb 2004 01:18:11 GMT

echo $SHELL

The default is set by admin in /etc/passwd

Posix and Korn shell are identical in many features.

SEP

Re: about shell

T G Manikandan — Wed, 04 Feb 2004 01:19:58 GMT

you can also do a

#ps

and check for the largest pid used by a shell.That is the shell you are working.

ex.
24917 pts/te 0:00 ps
22839 pts/te 0:00 telnetd
22840 pts/te 0:00 sh
24916 pts/te 0:00 ksh

here i am now working on ksh.24916 is the latest process than 22840

Re: about shell

Mark Grant — Wed, 04 Feb 2004 01:29:55 GMT

Actually, the portable way to do it, regardless of what shell you happen to be in at the time is.

echo $0

Re: about shell

Elmar P. Kolkman — Wed, 04 Feb 2004 01:33:48 GMT

Or: ps -p $$
If your only interested in the shell itself: ps -p $$ | awk '{print $NF}'
$$ contains the process number of your current shell.

$SHELL is set when logging in, but if you start a subshell it will not get updated. $$ will.

Re: about shell

Elmar P. Kolkman — Wed, 04 Feb 2004 02:27:08 GMT

'echo $0' does not work with the csh... Bear that in mind.