Port permissions problem?

[Stacey Akerstrom]

When trying to run the following, this is what we're seeing:
HPISP> echo '0 2 I-O RB' | ../c-object/ttyscale /dev/tty2a5 01
Cannot open device /dev/tty2a5

If I run it as root, I get the correct response. Why would the port care who's running it, and is there a way around it?

Thanks-
Stace

[G. Vrijhoeven · Accepted solution]

Hi,

Take a look at the rights of the /dev/tty2a5 device file.

Gideon

[Jeff Schussele]

Hi Stace,

Also look at the perms on that device.
Normally they're 666 or crw-rw-rw-
May be that the write perms are not there.

HTH,
Jeff

[Stacey Akerstrom]

Permissions are 622, which was the default when I created the port.

[G. Vrijhoeven]

Stace,

if it is 622 a user does not have the permissions as a user to write to the device file.

Gideon

[Stacey Akerstrom]

Thanks guys.
I changed perms to 666 and got a much different response.