#13945: 'ghc-pkg update' fails due to bad file descriptor error ---------------------------------+---------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: patch Priority: high | Milestone: 8.2.2 Component: Compiler | Version: 8.2.1-rc3 Resolution: | Keywords: Operating System: Linux | Architecture: Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3897 Wiki Page: | ---------------------------------+---------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"f86de44dac0a6ca40c5fcd65f3a1944c45fa6011/ghc" f86de44/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="f86de44dac0a6ca40c5fcd65f3a1944c45fa6011" ghc-pkg: Try opening lockfiles in read-write mode first As pointed out in #13945, some filesystems only allow allow exclusive locks if the fd being locked was opened for write access. This causes ghc-pkg to fail as it first attempts to open and exclusively lock its lockfile in read-only mode to accomodate package databases for which we lack write permissions (e.g. global package databases). Instead, we now try read-write mode first, falling back to read-only mode if this fails. Reviewers: austin Subscribers: rwbarton, thomie GHC Trac Issues: #13945 Differential Revision: https://phabricator.haskell.org/D3897 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13945#comment:14> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler