Korn Shell. 1 environment variable - 3 possible values at this time.

File names and value's
1mo - XFG1moDR
2mo - XFG2mo
3mo - XFG3mo.

The environment variable in one of the korn shell scripts needing one of the three values depending on the backup requirements:
NB_ORA_SCHED.

I'm wanting to read/source/bring in the value of one the 3 files.
As in
whatever it takes to get 1mo value into a variable in the shell and then:
export NB_ORA_SCHED=<shell variable>

I have 17 Oracle instances on a very large server,
each instance with it's own backup script.

9 uses the value in 3mo, 6 uses the value in 2mo, and 2 uses the value in 1mo as the value for the environment variable NB_ORA_SCHED.

Over the past few years - as the process changes - these values have changed. SO rather than manually editing 17 scripts to change the value, I'm wanting to edit 1 of 3 files as needed.

Again, these scripts are parameterized to some degree within the script. However, they are written so that if my backup, my backup's backup, my backup's backup's backup, and I get hit with a bus, any DBA can be given access to the server and will be able to manually (if needed) submit the backup without having to know anything other than
1. log on to server
2. go to this place
3. manually submit this .ksh script.

The plan is to make it as simple as it should be but no simpler.

As a note. Above, when I mentioned the process, you need to understand the way its done here. We have any number of pointy headed managers who feel the need to do something managerish fairly frequently. One way to do that is to rename items. So what one month may be bk_onsite_1mo may become XFG1mo the next.

You must understand - the process is paramount. Resistance is futile, you will be assimilated.

Being able to put values that change into a file that get read into a ksh script is one way to cut down on the impact of such managerish actions.

The scripting guru was not assimilated, he managed to go somewhere else. Me, I get to learn more about Korn shell scripting now.

Thanks again.
WolfBrother