/dev/ttyS0 Permissions Issue

[peteroddan]

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Hi Everyone,

I'm running SUSE Linux Enterprise Server 10 and am having problems setting the permissions to my serial port.

I've tried setting it through the GUI - this works ok, but seems to reset when the server reboots.
I've also tried typing chown <user> /dev/ttyS0 from a terminal window.
Again, this works ok, until I reboot, when the permissions are set back to default (root).

I'm quite new to Linux but think I have a reasonable understanding of it so far....any suggestions of what I am doing wrong would be appreciated.

Thanks,

Peter.

[element609]

I needed to change permissions to /dev/ttyS0 on Fedora Core 5 as well.
Since security isn't a big issue on this box, I'm adding rw to all users:

#chmod a+rw /dev/ttyS0

Which is eliminated at reboot, since udev rewrites /dev each boot, if I understand correctly.

This is the solution that works for me:

http://www.astro.louisville.edu/moor...el-3.1/INSTALL - has a section on editing the UEV settings. Basically it says:

As root, edit:
/etc/udev/rules.d/50-udev-default.rules

To:

KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp"

Change to --

KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="666"

I assume that you can change it to:
KERNEL=="tty[A-Z]*", NAME="%k", GROUP="YOUR GROUP"

Hope this helps.

[peteroddan]

Wow, I'd forgotten about that one!

Thanks for that, I'll take a look and see if I can get my project working again!