TTYSLOT(3)						     Library Functions Manual							TTYSLOT(3)

NAME

       ttyslot, fttyslot - utmp slot number

SYNOPSIS

       #define _MINIX_SOURCE 1
       #include <unistd.h>

       int ttyslot(void)
       int fttyslot(int fd)

DESCRIPTION

       Ttyslot() returns the index of the login terminal in the utmp file.  It tries fttyslot() on file descriptors 0, 1, and 2 to find the index.

       Fttyslot()  returns  the  utmp  index of the terminal associated with file descriptor fd.  First it tries to map fd to a terminal name with
       ttyname(3), then it searches the ttytab(5) database with the getttyent(3) function for this terminal.  This means that the utmp slot number
       is the same as the ttytab entry number counting from 1.	The value 0 is returned if no slot number can be found for a file descriptor.

SEE ALSO

       ttyname(3), getttyent(3), utmp(5), ttytab(5), init(8).

NOTES

       Since 0 is used as an error return this means that the first entry in the utmp file is not used.

       Ttyslot() is often found in a UNIX implementation, fttyslot() is Minix specific.

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																	TTYSLOT(3)