isatty — test whether a file descriptor refers to a terminal
#include <unistd.h>
int
isatty( |
int fd); |
The isatty() function tests
whether fd is an open
file descriptor referring to a terminal.
isatty() returns 1 if
fd is an open file
descriptor referring to a terminal; otherwise 0 is returned,
and errno is set to indicate the
error.
fd is not a
valid file descriptor.
fd refers to
a file other than a terminal. POSIX.1 specifies the
error ENOTTY for this
case.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
isatty() |
Thread safety | MT-Safe |
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and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
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