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I need to save a pid of a child started with $: su <user> -c “nohup …”

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Top Forums Shell Programming and Scripting I need to save a pid of a child started with $: su <user> -c “nohup …”
# 1  
Old 05-30-2014
I need to save a pid of a child started with $: su <user> -c “nohup …”
Hello,

I want to save pid of a child process but I get empty file.

Code:
su myuser -c "nohup ./mydaemon.sh >/dev/null 2>&1 & print $! > mydaemon.pid"

This one works:

Code:
nohup ./mydaemon.sh >/dev/null 2>&1 & print $! > mydaemon.pid

Please help. Thank you in advance.
# 2  
Old 05-30-2014
Try this instead:

Code:
su myuser -c 'nohup ./mydaemon.sh >/dev/null 2>&1 & echo $! > mydaemon.pid'

I think $! is being expanded before su is called.

Also ensure mydaemon.pid and . are writable by myuser
# 3  
Old 05-31-2014
That solved it, thank you.
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