@(#)ttyname.3 4.1 (Berkeley) 05/15/85

.AT 3 ttyname, isatty, ttyslot - find name of a terminal char *ttyname(fildes)

isatty(fildes)

ttyslot()

Ttyname returns a pointer to the null-terminated path name of the terminal device associated with file descriptor fildes .

Isatty returns 1 if fildes is associated with a terminal device, 0 otherwise.

Ttyslot returns the number of the entry in the ttys (5) file for the control terminal of the current process.

/dev/\(**

/etc/ttys

ioctl(2), ttys(5) Ttyname returns a null pointer (0) if fildes does not describe a terminal device in directory `/dev'.

Ttyslot returns 0 if `/etc/ttys' is inaccessible or if it cannot determine the control terminal.

The return value points to static data whose content is overwritten by each call.