[Boost-bugs] [Boost C++ Libraries] #3884: boost fstream 'enforces' in AND out mode. It should be be possible to open a read-only file using fstream.

Subject: [Boost-bugs] [Boost C++ Libraries] #3884: boost fstream 'enforces' in AND out mode. It should be be possible to open a read-only file using fstream.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-01-31 12:31:57

#3884: boost fstream 'enforces' in AND out mode. It should be be possible to open
a read-only file using fstream.
---------------------------------------------+------------------------------
 Reporter:  Sachin Garg <schngrg@…>          |       Owner:  bemandawes
     Type:  Bugs                             |      Status:  new       
Milestone:  To Be Determined                 |   Component:  filesystem
  Version:  Boost 1.41.0                     |    Severity:  Problem   
 Keywords:                                   |  
---------------------------------------------+------------------------------
 boost fstream 'enforces' in AND out mode by adding both in and out flags
 to the user specified file open mode.

 Check boost\filesystem\fstream.hpp line 479, it does:

   mode | std::ios_base::in | std::ios_base::out

 This makes it impossible to use fstream object to open a file for only
 reading or writing. This is especially troublesome when trying to open a
 read-only file as open call will fail with access denied error.

 Fix: fstream should not modify 'mode' value and use the user specified
 value as is.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3884>
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