posix_ttyname
(PHP 4, PHP 5, PHP 7, PHP 8)
posix_ttyname — Determine terminal device name
说明
posix_ttyname
( resource|int
$file_descriptor
) : string|false
Returns a string for the absolute path to the current
terminal device that is open on the file descriptor
file_descriptor.
参数
-
fd -
The file descriptor, which is expected to be either a file resource or an int. An int 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.
返回值
On success, returns a string of the absolute path of the
file_descriptor. On failure, returns false