[opensuse] udev rules; use of uucp group for devices
Hi, I am wondering why so many udev rules assign the uucp group to devices? Isn't the uucp group for a mail program? Why does for example in 50-udev-default.rules (openSUSE 10.3) it says: KERNEL=="tty[A-Z]*|pppox*|ircomm*|noz*", GROUP="uucp" which will assign the uucp group to /dev/ttyUSB0. I try to access the ttyUSB0 device from a normal user account and I am hesitant to add the user to the uucp group. I would rather change the rule so that the ttyUSB0 device gets assigned to the dialout group, but adding an updated rule like above to the 10-local.rules file won't make a different. Only after commenting out the rule in the 50-.. file it works. Could someone please explain the intended use of the uucp group in connection with devices? Thanks for your help. Cheers, Guenter -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, Sep 14, 2008 at 12:46:33AM +0200, Günter Dannoritzer wrote:
I am wondering why so many udev rules assign the uucp group to devices?
In the young days of mail and news UUCP was used to transport messages. These systems used modems to send and receive messages. Therefore people using uucp needed special access rights to the ttys as the dial process caused costs. And this stuff from the last millenium is still in use. Lars -- Lars Müller [ˈlaː(r)z ˈmʏlɐ] Samba Team SUSE Linux, Maxfeldstraße 5, 90409 Nürnberg, Germany
Lars Müller wrote:
On Sun, Sep 14, 2008 at 12:46:33AM +0200, Günter Dannoritzer wrote:
I am wondering why so many udev rules assign the uucp group to devices?
In the young days of mail and news UUCP was used to transport messages. These systems used modems to send and receive messages.
Therefore people using uucp needed special access rights to the ttys as the dial process caused costs.
Thanks for explaining that. I see, so the intended way of using that is to add the user who can use that equipment to the uucp group? How is that compared to the dialout group? I mean, is it just another group like that? I was just worried that I would add my user to a group that is actually intended for security reason for some software. Guenter -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Tue, Sep 16, 2008 at 09:36:05PM +0200, Günter Dannoritzer wrote:
Lars Müller wrote:
On Sun, Sep 14, 2008 at 12:46:33AM +0200, Günter Dannoritzer wrote:
I am wondering why so many udev rules assign the uucp group to devices?
In the young days of mail and news UUCP was used to transport messages. These systems used modems to send and receive messages.
Therefore people using uucp needed special access rights to the ttys as the dial process caused costs.
Thanks for explaining that. I see, so the intended way of using that is to add the user who can use that equipment to the uucp group?
Maybe. I'm no longer sure. I've created a new user on a openSUSE 11.0 system and got: gab:~ # LC_ALL=POSIX id ddummy uid=21626(ddummy) gid=100(users) groups=100(users),16(dialout),33(video)
How is that compared to the dialout group? I mean, is it just another group like that?
Maybe one of the SUSE Security Team knows. Lars -- Lars Müller [ˈlaː(r)z ˈmʏlɐ] Samba Team SuSE Linux, Maxfeldstraße 5, 90409 Nürnberg, Germany
Lars Müller wrote:
On Tue, Sep 16, 2008 at 09:36:05PM +0200, Günter Dannoritzer wrote:
Lars Müller wrote:
On Sun, Sep 14, 2008 at 12:46:33AM +0200, Günter Dannoritzer wrote: ...
How is that compared to the dialout group? I mean, is it just another group like that?
Maybe one of the SUSE Security Team knows.
Thanks for the help. I will ask the question over at the opensuse-security mailing list. Guenter -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (2)
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Günter Dannoritzer
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Lars Müller