如果在后台运行，则无法从脚本调用子shell

Question

I have a script running in background, like:

su - insite1 -c "invokeTest.sh" &

Now this script, invokeTest.sh has contents:

while [ 1 ]
do
  echo "Hello World from invokeTest" >> /tmp/invokeTest
  ( exec "/tmp/test.sh" )
done

Although it prints, "Hello World from invokeTest" it does not call test.sh.

My question: Is there any way to call test.sh in infinite while loop directly from su - insite1 -c" " so that we can totally skip invokeTest.sh itself (but test.sh needs to run in background"?

If no, how to make sure test.sh is called from invokeTest.sh ?

Answer 1

To answer your question about running the command without a script, you can put any shell commands into the -c argument, including a while loop. So you can write:

su - insite1 -c 'while :; do echo "Hello World" >> /tmp/invokeTest; /tmp/test.sh; done' &