| ISATTY(3C) | Standard C Library Functions | ISATTY(3C) |
#include <unistd.h> int isatty(int fildes);
The isatty() function tests whether fildes, an open file descriptor, is associated with a terminal device.
The isatty() function returns 1 if fildes is associated with a terminal; otherwise it returns 0 and may set errno to indicate the error.
The isatty() function may fail if:
EBADF
ENOTTY
The isatty() function does not necessarily indicate that a human being is available for interaction via fildes. It is quite possible that non-terminal devices are connected to the communications line.
See attributes(7) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Standard |
| MT-Level | MT-Safe |
| July 24, 2002 | OmniOS |