How to run nohup and write its pid file in a single bash statement

I want to run my script in background and then write its pid file. I am using nohup to do this.

This is what i came up with,

nohup ./myprogram.sh > /dev/null 2>&1 & && echo $! > run.pid 

But this gives a syntax error.

The following doesn’t give syntax error but the problem is echo $! doesn’t write the correct pid since nohup is run in a sub shell

(nohup ./myprogram.sh > /dev/null 2>&1 &) && echo $! > run.pid 

Any solutions for this, given i want a single line statement for achieving this?

Answer

You already have one ampersand after the redirect which puts your script in background. Therefore you only need to type the desired command after that ampersand, not prefixed by anything else:

nohup ./myprogram.sh > /dev/null 2>&1 & echo $! > run.pid