[Boost-bugs] [Boost C++ Libraries] #5123: Interprocess: permissions are changed when opening a memory segment

Subject: [Boost-bugs] [Boost C++ Libraries] #5123: Interprocess: permissions are changed when opening a memory segment
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-01-26 12:19:03

#5123: Interprocess: permissions are changed when opening a memory segment
------------------------------+---------------------------------------------
 Reporter:  xavi@…            |       Owner:  igaztanaga  
     Type:  Bugs              |      Status:  new         
Milestone:  To Be Determined  |   Component:  interprocess
  Version:  Boost 1.45.0      |    Severity:  Problem     
 Keywords:                    |  
------------------------------+---------------------------------------------
 In linux, fchmod is used to set the permissions after successfully
 shm_opening a segment.
 This is good to circumvent the problems caused by umask, but there is an
 error and fchmod is also run when opening (as opposed to creating) the
 segment, which means that opening a segment always resets its permissions
 to the defaults.

 This can be easily fixed by changing, in shared_memory_object.hpp, the
 line

     if(m_handle >= 0)

 right before the fchmod with:

     if(m_handle >= 0 && type != detail::DoOpen)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5123>
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