copy_file_file() fails on cygwin when the source is on externel FS (extfs)

[Pavel Tsekov <ptsekov gmx net>]

Please, take a look a the following link:
http://www.cygwin.com/ml/cygwin/2002-07/msg00786.html

The problem is that the temporary file (/tmp/extfsXXXXXX), representing a
file in the external FS, is  opened with O_RDONLY and O_APPEND.

I was curious what is the purpose of O_LINEAR if we're opening the file for
reading.

Thanks!

Pavel Tsekov

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