ttyslot, fttyslot - utmp slot number
#define _MINIX_SOURCE 1
int fttyslot(int fd)
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.
ttyname(3), getttyent(3), utmp(5), ttytab(5), init(8).
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
Kees J. Bot (email@example.com)