[erlang-questions] size of an open file

Bengt Kleberg <>
Wed May 14 09:44:18 CEST 2008


You have 2 possibilities according to the manual of the file module:
1) file:position/2 should return the file size, if called with 'eof' as
2) if this is for debugging you can use file:pid2name/1 and get the file
name (for subsequent use in file:read_file_info/1).


On Wed, 2008-05-14 at 11:49 +1000, jm wrote:
> How do I get the size of an open file? file:read_file_info(Filename) 
> does it based on the name of the file but what about using an IoDevice 
> as returned by file:open/2.
> Jeff.
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