NAME

ttyname, isatty, ttyslot − find name of a terminal

SYNOPSIS

char ∗ttyname(filedes)

isatty(filedes)

ttyslot()

DESCRIPTION

Ttyname returns a pointer to the null-terminated pathname of the terminal device associated with file descriptor filedes. (This is a system file descriptor and has nothing to do with the standard I/O FILE typedef.)

Isatty returns 1 if filedes 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. 

FILES

/dev/∗
/etc/ttys

SEE ALSO

ioctl(2), ttys(5)

DIAGNOSTICS

Ttyname returns a null pointer (0) if filedes 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. 

BUGS

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

INTEGRATED SOLUTIONS 4.3 BSD  —  1 August 1985