Manual of ISATTY(3) (v2.19)

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)