TTYNAME(3) TTYNAME(3)
NAME
ttyname, cttyname, isatty, ttyslot - find name of a terminal
SYNOPSIS
char *ttyname(fildes)
char *cttyname()
isatty(fildes)
ttyslot()
DESCRIPTION
Ttyname returns a pointer to the null-terminated path name
of the terminal device associated with file descriptor
fildes.
Cttyname returns a pointer to the path name of the terminal
device associated with the first file descriptor among 0,1,2
that is connected to a terminal device. This probably is
the control terminal for the present process.
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.
FILES
/dev/*
/etc/ttys
SEE ALSO
ioctl(2), ttys(5)
DIAGNOSTICS
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.
BUGS
The return value points to static data whose content is
overwritten by each call.