09-16-2008
If the output from who -x includes the TTY then you can use that to map to the current user. The tty command prints your current tty, or you can correlate with the current process's PID in a ps listing, which also usually includes tty information. (Not sure about SCO specifics, tho.)
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TTY(4) Linux Programmer's Manual TTY(4)
NAME
tty - controlling terminal
DESCRIPTION
The file /dev/tty is a character file with major number 5 and minor number 0, usually of mode 0666 and owner.group root.tty. It is a syn-
onym for the controlling terminal of a process, if any.
In addition to the ioctl() requests supported by the device that tty refers to, the following ioctl() request is supported:
TIOCNOTTY
Detach the current process from its controlling terminal, and remove it from its current process group, without attaching it to a
new process group (that is, set its process group ID to zero). This ioctl() call only works on file descriptors connected to
/dev/tty; this is used by daemon processes when they are invoked by a user at a terminal. The process attempts to open /dev/tty; if
the open succeeds, it detaches itself from the terminal by using TIOCNOTTY, while if the open fails, it is obviously not attached to
a terminal and does not need to detach itself.
FILES
/dev/tty
SEE ALSO
mknod(1), chown(1), getty(1), termios(3), console(4), ttys(4)
Linux 1992-01-21 TTY(4)