Rosrun as super user

asked 2014-08-08 04:35:57 -0600

trc123
5 ●2 ●2 ●5

updated 2014-08-08 05:09:43 -0600

Hello, I have some code in my ros node (within a catkin workspace) that requires super user privilege in order to access some serial ports. How can this be done as sudo does not work with rosrun.

Thanks.

Edit: This is using the admin account:

$groups ros
ros : ros adm dialout cdrom sudo dip plugdev lpadmin sambashare

edit retag flag offensive close merge delete

Comments

How about you try to open the ports in .bashrc file ?

sai ( 2014-08-08 04:37:21 -0600 )edit

How can this be done?

trc123 ( 2014-08-08 04:43:00 -0600 )edit

add a comment

8

answered 2014-08-08 04:47:48 -0600

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

updated 2014-08-08 05:19:38 -0600

You should really not use sudo with rosrun. It leads to all sorts of nastiness with permissions.

For serial ports (and access to other hardware through /dev/xxx) you just need to give the relevant user (most likely your user) access to the device file (fi: /dev/ttyS0). This is not ROS specific.

See How do I allow a non-default user to use serial device ttyUSB0? on the Ubuntu stack-exchange for instance.

For ROS specific answers: google: linux serial ports udev access, which gives you:

Edit: and just for completeness (and for the lazy), a quote from the first answer to the question on the Ubuntu stack-exchange:

As you've noticed, the /dev/ttyUSB0 device has the group of dialout. All you need to do is add the second user to the dialout group:

sudo adduser USERNAME dialout

Note: you need to log out and back in for your user groups to be reloaded.