[GHC] #8058: If .ghci is a symlink, permissions aren't read correctly

[GHC]

#8058: If .ghci is a symlink, permissions aren't read correctly
-------------------------------+-------------------------------------------
        Reporter:  berdario    |            Owner:
            Type:  bug         |           Status:  closed
        Priority:  low         |        Milestone:
       Component:  GHCi        |          Version:  7.6.2
      Resolution:  invalid     |         Keywords:
Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple             |       Difficulty:  Easy (less than 1 hour)
 Type of failure:  Other       |       Blocked By:
       Test Case:              |  Related Tickets:
        Blocking:              |
-------------------------------+-------------------------------------------

Comment (by leroux):

 {{{
 $ ghci
 GHCi, version 7.6.3: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 *** WARNING: /Users/leroux/Dropbox/src/dotfiles/haskell is writable by
 someone else, IGNORING!
 Prelude>
 Leaving GHCi.

 $ ls -l .ghci
 lrwxr-xr-x  1 leroux  staff  44 Jul 30 10:02 .ghci ->
 /Users/leroux/.dotfiles/haskell/ghci.symlink

 $ ls -l `readlink .ghci`
 -rwxr-x---  1 leroux  staff  338 Sep 22 18:59
 /Users/leroux/.dotfiles/haskell/ghci.symlink

 $ ls -ld `dirname $(readlink .ghci)` # this is equivalent to
 `/home/dario/.dotfiles/dotfiles`
 drwxr-x--x  4 leroux  staff  136 Aug  9 00:41
 /Users/leroux/.dotfiles/haskell

 # making the home of .ghci writable
 $ chmod ugo+w `dirname $(readlink .ghci)`

 $ ls -ld `dirname $(readlink .ghci)`
 drwxrwx-wx  4 leroux  staff  136 Aug  9 00:41
 /Users/leroux/.dotfiles/haskell

 $ ghci
 GHCi, version 7.6.3: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 *** WARNING: /Users/leroux/Dropbox/src/dotfiles/haskell is writable by
 someone else, IGNORING!
 }}}

 Note that `/Users/leroux/.dotfiles/haskell` is equivalent to
 `/home/dario/.dotfiles/dotfiles` as they are the directory where `.ghci`
 file lives.

 ----

 berdario, it'd be helpful if you let us know what the directory
 permissions are (as rwbarton asked):
 {{{
 ls -ld `dirname $(readlink .ghci)
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8058#comment:5>
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