[GHC] #2233: Overhaul System.Process

[GHC]

#2233: Overhaul System.Process
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        Reporter:  simonmar           |            Owner:  simonmar
            Type:  task               |           Status:  patch
        Priority:  normal             |        Milestone:  _|_
       Component:  libraries/process  |          Version:  6.8.2
      Resolution:                     |         Keywords:
Operating System:  Unknown/Multiple   |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown       |       Difficulty:  Unknown
       Test Case:                     |       Blocked By:
        Blocking:                     |  Related Tickets:
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:"b601209456e13ca3d08faffb7e6771bcb8c1b1b4/process"]:
 {{{
 #!CommitTicketReference repository="process"
 revision="b601209456e13ca3d08faffb7e6771bcb8c1b1b4"
 All new sync process functions now terminate on an exception (#2233)

 Now all the functions that call a process synchronously have the same
 behaviour. Previously just readProcess, readProcessWithExitCode did
 this, now callProcess and callCommand do too.

 If a thread running one of these functions gets an exception, including
 async exceptions (such as from timeout or killThread), then the
 external process gets terminated.

 Introduce a helper function to implement this behaviour. Currently it
 is not exposed to users, but that could be changed easily.

 Authored-by: Duncan Coutts <duncan at well-typed.com>
 Signed-off-by: Herbert Valerio Riedel <hvr at gnu.org>
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2233#comment:24>
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