about shell

[leyearn]

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?

[Hein van den Heuvel]

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


Anyway... how about: echo $SHELL

or: env | grep SHELL

Hein.

[Steven E. Protter]

echo $SHELL

The default is set by admin in /etc/passwd

Posix and Korn shell are identical in many features.

SEP

[T G Manikandan]

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

[Mark Grant]

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

echo $0

[Elmar P. Kolkman]

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.

[Elmar P. Kolkman · Accepted solution]

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