How to set env variable for an already running shell from other shell ?

[yogeshwar sonawane <yogyas@xxxxxxxxx>]

Hi all,

Can one export/set some variables for an already running shell from
other shell ?
Is there any command where i can specify env=value & shell process id ?

This is similar to sending signals from one to another process.

We have one program, which prints some debugging information when a
env variable is set. During execution, first a new shell is created &
then program is executed.
Sometimes that program gets stuck somewhere without printing anything.
If i set the env variable & then execute, the messages will come from
start of execution.
I want some mechanism so that when program is stuck, i can set that
env variable which will enable printing debugging information.

Is this possible using some command ? OR how to do this ?

This question is somewhat out of topic(not related to kernel). But,
still help will be appreciated.

TIA,
Yogeshwar

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