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