tcheck if loop mount is possible - tomb - the crypto undertaker
  HTML git clone git://parazyd.org/tomb.git
   DIR Log
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       ---
   DIR commit fa75d0f7bc374b88911c2bc5746bafb156987286
   DIR parent 914ac9594e47febf617d137c1fcac410edecda92
  HTML Author: Jaromil <jaromil@dyne.org>
       Date:   Thu,  5 Sep 2013 12:45:40 +0200
       
       check if loop mount is possible
       
       if not abort gracefully with an explanation
       (10x to Bucciarati and sdonk)
       
       Diffstat:
         M tomb                                |       9 +++++++++
       
       1 file changed, 9 insertions(+), 0 deletions(-)
       ---
   DIR diff --git a/tomb b/tomb
       t@@ -216,6 +216,15 @@ EOF
                exit $?
            fi # are we root already
        
       +    # check if we have support for loop mounting
       +    losetup -f > /dev/null
       +    { test "$?" = "0" } || {
       +        no "Loop mount of volumes is not supported on this machine, this error"
       +        no "often occurs on VPS and kernels that don't provide the loop module."
       +        no "It is impossible to use Tomb on this machine at this conditions."
       +        die "Operation aborted."
       +    }
       +
            # make sure necessary kernel modules are loaded
            modprobe dm_mod 2>/dev/null
            modprobe dm_crypt 2>/dev/null