[GHC] #8108: getGroupEntryForID in multi-threaded applications

[GHC]

#8108: getGroupEntryForID in multi-threaded applications
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        Reporter:  redneb            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  libraries/unix    |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Runtime crash     |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by redneb):

 And here's a patch that fixes the problem. The patch unifies even more the
 code for getGroupEntryForID, getGroupEntryForName, getUserEntryForID and
 getUserEntryForName and fixes the issue for all of them. As a side-effect
 of that unification, there is a tiny user visible change in the behavior
 of those functions: if they don't find what are they looking for (group
 id, user name etc), they now all fail with isDoesNotExistError.
 Previously, only getGroupEntryForName and getUserEntryForName would throw
 that error. getGroupEntryForID and getUserEntryForID would throw a generic
 IOError. I think this is a desirable change. The patch also updates the
 documentation to reflect that change.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8108#comment:1>
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