isatty (3) manual page
Table of Contents
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
SVr4, 4.3BSD, POSIX.1-2001.
See Also
