ttyslot(3C)                    DG/UX 5.4R3.00                    ttyslot(3C)


NAME
       ttyslot - find the slot in the utmp file of the current user

SYNOPSIS
       #include <stdlib.h>
       int ttyslot (void);

DESCRIPTION
       ttyslot returns the index of the current user's entry in the
       /var/adm/utmp file.  The returned index is accomplished by scanning
       files in /dev for the name of the terminal associated with the
       standard input, the standard output, or the standard error output (0,
       1, or 2).

FILES
       /var/adm/utmp


   Considerations for Threads Programming
                     +---------+-----------------------------+
                     |         |                      async- |
                     |function | reentrant   cancel   cancel |
                     |         |              point    safe  |
                     +---------+-----------------------------+
                     |ttyslot  |     Y          N        N   |
                     +---------+-----------------------------+

SEE ALSO
       reentrant(3), getut(3C), ttyname(3C).

DIAGNOSTICS
       A value of -1 is returned if an error was encountered while searching
       for the terminal name or if none of the above file descriptors are
       associated with a terminal device.























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