Friday, February 27, 2009

hdaemonize on hackage

Having got a green light from Andre, I uploaded hdaemonize to Hackage.

I also cleaned up the library a bit. Reading up on POSIX signals I decided that it is wrong for the daemonize library to mess with them beyond blocking HUP. Also, now it has two functions, daemonize :: IO () -> IO () which does the bare minimum, and serviced :: Program -> IO () that does that and more, for example writing a PID file, handling start/stop/restart, catching and logging exceptions to syslog.

Time to try it out in production.

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5 comments:

  1. Joe FredetteMarch 11, 2009 at 12:45 AM

    Looks like theres a bug, During compile I get:

    System/Posix/Daemonize.hs:111:19:
    Not in scope: type constructor or class `SomeException'
    cabal: Error: some packages failed to install:
    hdaemonize-0.1 failed during the building phase. The exception was:
    exit: ExitFailure 1


    via cabal install.

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  2. Joe FredetteMarch 11, 2009 at 12:57 AM

    I managed to fix it by explicitly importing SomeException from the import Control.Exception line. I don't know how to use the git machine, so I can't send you the patch, but all I did was:

    - import Control.Exception
    + import Control.Exception (SomeException, IOException, finally, try, catch)

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  3. UnknownMarch 13, 2009 at 11:04 AM

    Thanks Joe. I think I unknowingly used a feature introduced in GHC10 and incompatible with GHC8. Will incorporate your patch today.

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  4. UnknownMarch 14, 2009 at 9:11 AM

    Hi Joe. I am not sure I completely understand the situation, but hopefully it was a problem with Exception libraries. I ported the package to GHC 6.8 and just uploaded a new version that hopefully solves whe issue with exceptions libraries. Basically I just used the extensible-exceptions package that backports GHC 6.10 exception handling back to GHC 6.8; hope this helps. If you have further problems, please let me know your platform, GHC and Cabal versions. Thanks!

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  5. UnknownMarch 20, 2009 at 12:28 AM

    hmm
    cabal install hdaemonize isn't working (failing on download) going to try manual install.

    ...

    after the manual download, I did a cabal install in the directory, seems to be working now. I was compiling w/ 6.10 before.

    Thanks for the fix! loving the package so far, I was dreading writing all that unixy lowlevel code.

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