su - id -c command and only return the result of the command

[Geoff Wild]

Okay - this should be easy - but I can't figure it out.

For example:

su - oraadm -c "echo \$ORACLE_HOME"

I only want to return the $ORACLE_HOME variable. I don't want all the "Copyright" information...

Basically, in a script I want to set the ORACLE_HOME variable to that of another user so I can launch a program.

Thanks...Geoff

[curt larson_1 · Accepted solution]

all the copyright stuff is part of the login process, so your always going to get that with su -

have you tried something like

su - oraadm -c "print oracle_home = \$ORACLE_HOME" | awk '
/^oracle_home/ {print $3;}'

[Michael Denney]

If you are running your script as root, you could simply source the .profile of the oraadm user. Example to put all the environment of oraadm user into your script:

. ~oraadm/.profile

[Geoff Wild]

Curt - very close - had to do it like this:

su - iqaadm -c "printf oracle_home=\$ORACLE_HOME" |awk -F= '/^oracle_home/ {print $2;}'

as print not found.

Thanks!

[Geoff Wild]

Michael - for various reasons, I won't source the .profile. I meant to mention that in the question.

Thanks...Geoff