Will the file get automatically closed, when opening process terminates

问题

I have a process, which opens the file by using file:open. Will this file get automatically closed, when my process will terminate?

回答1:

Yes. From the documentation of file:open/2:

Returns:

{ok, IoDevice}

The file has been opened in the requested mode. IoDevice is a reference to the file.

[...]

IoDevice is really the pid of the process which handles the file. This process is linked to the process which originally opened the file. If any process to which the IoDevice is linked terminates, the file will be closed and the process itself will be terminated.

来源：https://stackoverflow.com/questions/28066839/will-the-file-get-automatically-closed-when-opening-process-terminates