POSIX_ISATTY(3) 1 POSIX_ISATTY(3)posix_isatty - Determine if a file descriptor is an interactive terminalSYNOPSIS
bool posix_isatty (mixed $fd)
DESCRIPTION
Determines if the file descriptor $fd refers to a valid terminal type device.
PARAMETERS
o $fd
- The file descriptor, which is expected to be either a file resource or an integer. An integer will be assumed to be a file
descriptor that can be passed directly to the underlying system call. In almost all cases, you will want to provide a file
resource.
RETURN VALUES
Returns TRUE if $fd is an open descriptor connected to a terminal and FALSE otherwise.
SEE ALSO posix_ttyname(3).
PHP Documentation Group POSIX_ISATTY(3)
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isatty(3C) Standard C Library Functions isatty(3C)NAME
isatty - test for a terminal device
SYNOPSIS
#include <unistd.h>
int isatty(int fildes);
DESCRIPTION
The isatty() function tests whether fildes, an open file descriptor, is associated with a terminal device.
RETURN VALUES
The isatty() function returns 1 if fildes is associated with a terminal; otherwise it returns 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 fildes argument is not associated with a terminal.
USAGE
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.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO ttyname(3C), attributes(5), standards(5)SunOS 5.11 24 Jul 2002 isatty(3C)
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