add support for /etc/issue about kmscon HOT 2 OPEN

I recently face the same issue. I solved using /sbin/agetty instead of /bin/login.
ExecStart=/usr/bin/kmscon "--vt=%I" --seats=seat0 --no-switchvt -l /sbin/agetty -- -o '-p -- \u' --noclear - linux

Unfortunately doing this, no terminal identifier is printed (only a '-'). I developed a patch (https://github.com/kreijack/kmscon/tree/ptsname) which allow to pass '{ptsname}' in agetty command line, which will be replace by the terminal name (like 'pts/1').
'
ExecStart=/usr/bin/kmscon "--vt=%I" --seats=seat0 --no-switchvt -l /sbin/agetty -- -o '-p -- \u' --noclear {ptsname} linux
'

I even tried to implement the printing of /etc/issue in kmscon (https://github.com/kreijack/kmscon/tree/random-dev), but it is a lot of code (you have to take care of a lot of '<character>' code); moreover /bin/login has a timeout so if no key is pressed at login time, it exit and kmscon has to restart it.

Both of these issues disappear using /sbin/agetty instead of /bin/login.

Unfortunately, there is still noway to show the tty.

from kmscon.

@kreijack
If the only thing you really care about is printing, not actually passing the terminal value to agetty, you can do:

/usr/bin/kmscon "--vt=/dev/tty2" --seats=seat0 --no-switchvt -l /bin/bash -- -c "tty; /sbin/agetty -o \"-p -- \u\" - linux"

For some reason, substituting it like this:

/usr/bin/kmscon "--vt=/dev/tty2" --seats=seat0 --no-switchvt -l /bin/bash -- -c "/sbin/agetty -o \"-p -- \u\" `tty` linux"

did not really work.

You can get the VT (not PT) number with $XDG_VTNR instead.

from kmscon.