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  1. MariaDB Server
  2. MDEV-3918

myisamchk bogus error for files larger than 4G

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 5.5.28, 5.5.28a, 5.3.11, 5.2.13, 5.1.66
    • Fix Version/s: 10.0.2, 5.5.29, 5.1.67, 5.2.14, 5.3.12
    • Component/s: None
    • Labels:
      None
    • Environment:
      Windows, VS2010

      Description

      Was reported by SkySQL folks, in the upgrade context.

      What happens is that : my_copystat() function that is called near the end of myisamchk, calls stat(), which , on Windows, with Visual Studio 2010, returns an error on files larger than 4G (the struct stat is an ancient one , with 32bit st_size ).

      Ironically, returning an error instead of truncated size is a bugfix introduced in SDK from VS2010 upwards, and was not seen in earlier versions of C runtime library.

      There are variations of stat() (stat64, stati64) that can handle large files correctly. my_stat() behavior is correct, because it is using stat64.

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            • Assignee:
              wlad Vladislav Vaintroub
              Reporter:
              wlad Vladislav Vaintroub
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              Dates

              • Created:
                Updated:
                Resolved: