ISATTY(3)

NAME
isatty - does this descriptor refer to a terminal

SYNOPSIS
#include <unistd.h>

int isatty(int desc);

DESCRIPTION
returns 1 if desc is an open descriptor connected to a terminal and 0 else.

CONFORMING TO
SVID, AT&T, X/OPEN, 4.3BSD

SEE ALSO
fstat(2), ttyname(3)