Tim wrote: > > Just out of curiousity, I did a "ll /dev/tty*" and saw a strange mixture > of ownership: > <----------------------------[ SNIP ]---------------------------> > > Various "tty"s were owned by root:tty if they had a double-digit number, > or root:root if otherwise. The "ttyS"s were owned by root:uucp (this > box only has one or two serial ports - one's external, and I can't > remember if there is an internal one). > > I know tty and ttyS aren't the same thing, but it seems an odd mixture. > A big part of it is that there are programs that are using /dev/tty[0-7] and /dev/tty. These are the different virtual consoles. Normally, if no-one if logged in, tty1 through tty6 have mingetty running on them, running as root. In run level 5, tty7 normally will have a display manager running until someone logs in. Try doing a command line login as a normal user, and look at the tty that matched the VT number. It will be owned by that user that just logged in. If you change the number of command line logins, or have more then one X secession running, you will change the ownership/permissions on a different number of the ttys. Ownership can also be changed because they are being used by other programs. I like to use a couple of ttys to display different outputs of syslogd. They can also be handy to display the error output of a program under test. Now, as you noted, the /dev/ttyS* are different. These are physical serial ports, not virtual ports. (Though there may be more device entries then there are physical ports.) Exactly how the permissions are set depends on the version of Fedora, and how you have console.perms set. If you desire, you can set a serial port to be owned by the person logged into the console. It is also possible to have a symlink to a serial port and have the symlink managed by console.perms. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!
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