Script running root but one command need to be run with another user

[Leo The Cat]

Hi

I've a script running with root to execute some root commands and in this same script some commands needs to be run under another user.

My script:
1. root command
2. root command
3. here user2 command
4. root command
5. root command
6. here user2 command


I need to run 3 and 6 with the user2 because some processes will be started and the owner of the process must be user2 !

How to do this ?
note: I don't want two scripts.

Is it possible ?

Regards
Den

[James R. Ferguson]

Hi Den:

For your non-root tasks, you can do:

# su - someuser -c "some_command;another_command"

Regards!

...JRF...

[Mel Burslan]

did you try this ?

1. root command
2. root command
3. su - user2 -c "command1; command2; command3"
4. root command
5. root command
6. su - user2 -c "command4; command5; command6"

since you are root to start running this script, there should not be any problem su'ing into user2 account without a password.

Hope this helps

[SKR_1]

You can make the entry in your script to switch over to perticular user.

su - username -c "command to be executed"

You can refer manpages for su

Thanks

SKR

[Leo The Cat]

a little problem

In my script I've try with:
su - oracle -c "$ORACLE_HOME/mycommand.ksh"

The problem is that $ORACLE_HOME is not defined and of course I've the error: ksh: /mycommand.ksh: not found.

How to fix this. I Need to work with ORACLE_HOME to have only one generic script ...

Regards
Den

[Heironimus]

Using double quotes means that the variable $ORACLE_HOME is interpolated by the (root) shell running the script instead of the shell started by su as oracle. If you have ORACLE_HOME defined in the oracle user's .profile or something similar then you can enclose the command in single quotes or escape the dollar sign with a backslash.

[TTr · Accepted solution]

If you only have one ORACLE_HOME in this server, you can set it in the root's environment. If you have several oracle versions installed, you need to calculate the value of the "ORACLE_HOME" based on the ORACLE_SID that you are executing the script against. You should use the /etc/oratab to grep the line with the correct SID and then pick-up the ORACLE_HOME from there.

In addition to ORACLE_HOME and depending what the "su - oracle" command does, you may also need to setup the TNS_ADMIN, SHLIB_PATH, LD_LIBRARY_PATH variables.

[Leo The Cat]

I can't do this. (Admin Unix don't want!)
I need to have this.

Is it possible to load the user profile with something like that (but this does not work), so just in the idea :

su - applopus -c "(. /home/applopus/.profile >/dev/null; $ORACLE_HOME/backup_restore/bkp_restore.sh -m backup_instance_online)"

(huh!)

Regards
Den

[OldSchool]

"Is it possible to load the user profile with something like that (but this does not work), so just in the idea :

su - applopus -c "(. /home/applopus/.profile >/dev/null; $ORACLE_HOME/backup_restore/bkp_restore.sh -m backup_instance_online)"

Try it with single quotes (as noted previously) , and note that running the .profile in the command string isn't necessary here, as the "-" in the su causes that to happen.

[Leo The Cat]

It's ok with su - user and quote syntax !
Thanks