ISATTY
Section: Linux Programmer's Manual (3)
Updated: 2008-12-03
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NAME
isatty - test whether a file descriptor refers to a terminal
SYNOPSIS
#include <unistd.h>
int isatty(int fd);
DESCRIPTION
The
isatty()
function tests whether
fd
is an open file descriptor referring to a terminal.
RETURN VALUE
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.
ERRORS
- EBADF
-
fd
is not a valid file descriptor.
- EINVAL
-
fd
refers to a file other than a terminal.
POSIX.1-2001 specifies the error
ENOTTY
for this case.
CONFORMING TO
SVr4, 4.3BSD, POSIX.1-2001.
SEE ALSO
fstat(2),
ttyname(3)
COLOPHON
This page is part of release 3.27 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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