Allow a service to get to USB

Question

I have a python script that runs in the background and handles serial communications on a USB port.
I've never used systemd before but I thought that this would be a great excuse to try it out. Things are working OK - I managed to put in the couple of dependencies I needed, specifically, that it should allow openntpd.service to set the OS clock.
BUT, it's having trouble accessing the serial port. I assume it's one of two problems:
1) I need to do change permissions of my service
2) I need to add another service to "After="
For reference, here's my service so far. Any other general feedback is appreciated!
[Unit]
Description=USB Serial Listener
After= openntpd.service
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/sh -c /root/USBSerialListener
[Install]
WantedBy=multi-user.target
Note: USBSerialListener is a bash script that pipes my output somewhere for me to check later. Is there a way to code that into the systemd framework?
Last edited by lthiery (2013-06-20 19:58:42)

Answer 1

I tried: systemctl status | grep 'mount'
and found a service called: systemd-remount-fs.service
I made my service run after it... it works but I don't know why and I don't know if its optimal. If somebody knows whats going on I would love to know!