| Extracted from Pike v7.8 release 866 at 2016-04-05.

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Stdio
Stdio.File

# Method Stdio.File()->is_open()

Method is_open

  `int is_open()`

Description

  Returns true if the file is open.

Note

  If the file is a socket that has been closed from the remote side, this function might still return true.

Note

  Most methods can't be called for a file descriptor that isn't open. Notable exceptions errno , mode , and the set and query functions for callbacks and backend.