Messages in this thread | | | Date | Sun, 19 Sep 2004 03:11:39 -0700 (PDT) | From | Mike Mestnik <> | Subject | Re: Design for setting video modes, ownership of sysfs attributes |
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--- Jon Smirl <jonsmirl@gmail.com> wrote:
> You did that from an xterm, right? Which console device is the xterm > running on? > > X starts up a process that knows which device it is running and it can > remember that device since X stays running. > Remember X opens the VC sepratly from it's console, hence it workes even when run from a serial or ssh terminal.
> Maybe the answer is that this is something for the VC layer since the > VC layer stays running and knows what device it was started on. An > escape sequence could query the device from the VC terminal emulator. > > Is there some way to figure this out from the environment? > > On Sat, 18 Sep 2004 21:57:32 -0400 (EDT), Vladimir Dergachev > <volodya@mindspring.com> wrote: > > On Sat, 18 Sep 2004, Jon Smirl wrote: > > > Isn't there an enviroment variable that tells what device is the > > > console for the session? How do you tell what serial port you're on > > > when multiple people are logged in on serial lines? > > > > From any program you can do this: > > > > volodya@silver:~$ ls -l /proc/self/fd/0 > > lrwx------ 1 volodya users 64 Sep 18 21:56 /proc/self/fd/0 -> > /dev/pts/1 > > > > So you get the pointer to the actual device stdin is associated to. > > -- > Jon Smirl > jonsmirl@gmail.com >
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