#10940: Random number chosen by openTempFile is always 1804289383846930886 -------------------------------------+------------------------------------- Reporter: andersk | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 7.10.2 Resolution: | Keywords: Operating System: Linux | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: #9058 | Differential Rev(s): -------------------------------------+------------------------------------- Comment (by slyfox): I agree it's a problem. Posting '''ghc-7.8.4''' results for comparison: {{{ $ runhaskell a.hs "/tmp/47" $ runhaskell a.hs "/tmp/59" $ runhaskell a.hs "/tmp/71" $ runhaskell a.hs "/tmp/83" $ runhaskell a.hs "/tmp/95" $ runhaskell a.hs "/tmp/107" }}} (nice +12 steps) The question is what to use so it would work on modern systems. I see the following routes: 1. use something portable and insecure like seeding with '''srand(time())''': will not behave nicely after '''fork()''' from haskell program, still predictable 2. introduce OS-specific branches to use '''mkstemp''' / '''mkostemp''' / '''mkostemps''' / '''GetTempFileName''' / '''GetTempPath'''. Is there a nicer way? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10940#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler