isatty#

Synopsis#

#include <unistd.h>

int isatty(int fildes);

Status#

Partially implemented

Conformance#

IEEE Std 1003.1-2017

Description#

The isatty() function shall test whether fildes, an open file descriptor, is associated with a terminal device.

Return value#

The isatty() function shall return 1 if fildes is associated with a terminal; otherwise, it shall return 0 and may set errno to indicate the error.

Errors#

The isatty() function may fail if:

EBADF - The fildes argument is not a valid open file descriptor.
ENOTTY - The file associated with the fildes argument is not a terminal.

Tests#

Untested

Known bugs#

None