[bug #25961] fatfs truncating files

[Thomas Schwinge]

URL:
  <http://savannah.gnu.org/bugs/?25961>

                 Summary: fatfs truncating files
                 Project: The GNU Hurd
            Submitted by: tschwinge
            Submitted on: So 22 Mär 2009 13:10:03 CET
                Category: Hurd Servers
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
         Reproducibility: Every Time
              Size (loc): None
         Planned Release: None
                  Effort: 0.00
Wiki-like text discussion box: 

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Details:

In a QEMU system, accessing the same file through ext2fs (backed by a disk
partiton image file) and fatfs (on-the-fly generated by QEMU from a directory
hierarchy), these files generally are reported by cmp to differ at ``char
8193''.  Copying such a file off of the fatfs will result in a bus error and
the file being truncated to 32768 bytes.

The problem is likely to be in fatfs, as GRUB can successfully access and
load files off of the QEMU-generated fatfs.





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