Can't create background process during sys-init stage

[Vesnica]

I want to do something when os bootup, so first I create /etc/rc.local and write the following:

#!/bin/sh

screen -dmS Test sleep 300
nohup ls > /ls.log &

exit 0

Then:
sudo chmod +x /etc/rc.local
sudo reboot

After system reboot:
sudo screen -ls (show No socket in /var/screen/S-root)
sudo ls / (there is no ls.log)

I get the same result when I try to put the screen or nohup code in another init script(such as /etc/init.d/rc.sysinit)

[Vesnica (vesnica)]

Ok, after hours googling and trial & error, I finally found the reason:

rc.local exit too fast, screen even have a chance to create socket before rc.local reach exit 0, so failure is inevitable.

Quick solution:

screen -dmS Test script -c 'sleep 300'
sleep 1

exit 0

Cheers

[Vesnica (vesnica)]

rc.local exit too fast, screen even have a chance to create socket before rc.local reach exit 0, so failure is inevitable.

Quick solution:

screen -dmS Test script -c 'sleep 300'
sleep 1

exit 0