Re: [Libguestfs] [PATCH 2/2] New API: pwrite-device
On Sun, Sep 26, 2010 at 07:55:03PM +0100, Richard W.M. Jones wrote:
+ [InitPartition, Always, TestOutputList (
+ [["pwrite_device"; "/dev/sda";
"\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000";
"446"];
+ ["blockdev_rereadpt"; "/dev/sda"];
+ ["list_partitions"]], [])],
This test probably deserves some more explanation.
InitPartition creates a single partition (/dev/sda1) for the test
environment.
The test code then zaps the MBR partition table, overwriting the table
and the signature with all zeroes. This Wikipedia page is a helpful
reference:
https://secure.wikimedia.org/wikipedia/en/wiki/Master_Boot_Record
We then tell the kernel to reread the partition table, and list the
partitions (which, being zapped, we expect to be an empty list).
Rich.
--
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