How to keep modem permissions from changing?

Jacob Schmude jacobs at
Sun Dec 2 03:22:29 EST 2001

   You're not using the DevFS by chance, are you? If so, you need to make sure that devfsd is configured to save and restore permissions. There's lines that you need to uncomment in devfsd.conf for this. The particular combination I have and notice this is the Lucent winmodem driver with the DevFS. However, in this case (and this case only, it seems) permissions will be saved, but the driver takes them over each time it loads. So they get reset anyway. The lucent driver is the only driver I know of that will do this, so if you're using that combination, you're going to have to put the permission changing lines in /etc/rc.d/rc.local (or whatever your distro uses for that).
   Outside of using an improperly configured devfs, check your startup scripts. All of them, and make sure there're no lines changing these perms. Of particular suspect (if you have it loading) would be the script that sets up your serial ports (/etc/rc.d/rc.serial on slackware). Note that on slackware, rc.serial does not load by default, so first check if it loads at startup.


On Sat, Dec 01, 2001 at 09:23:16PM -0600, Buddy Brannan wrote:
> Hey y'all;
> OK, this is really annoying and some stuff.
> I want my modem permissions to be read/write for owner and group
> (group is dialout), but they keep changing to read/write for owner and
> read-only for group! I keep changing them, but they keep changing
> back! (ARRRRRGH)
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