+ ("pwrite_device", (RInt "nbytes", [Device "device"; BufferIn "content"; Int64 "offset"], []), 275, [ProtocolLimitWarning],
+ [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"]], [])],
+ "write to part of a device",
+ "\
+This command writes to part of a device. It writes the data
+buffer C<content> to C<device> starting at offset C<offset>.
+
+This command implements the L<pwrite(2)> system call, and like
+that system call it may not write the full data requested
+(although short writes to disk devices and partitions are
+probably impossible with standard Linux kernels).
+
+See also C<guestfs_pwrite>.");
+
+ ("pread_device", (RBufferOut "content", [Device "device"; Int "count"; Int64 "offset"], []), 276, [ProtocolLimitWarning],
+ [InitEmpty, Always, TestOutputBuffer (
+ [["pread_device"; "/dev/sdd"; "8"; "32768"]], "\001CD001\001\000")],
+ "read part of a device",
+ "\
+This command lets you read part of a file. It reads C<count>
+bytes of C<device>, starting at C<offset>.
+
+This may read fewer bytes than requested. For further details
+see the L<pread(2)> system call.
+
+See also C<guestfs_pread>.");
+
+ ("lvm_canonical_lv_name", (RString "lv", [Device "lvname"], []), 277, [],
+ [InitBasicFSonLVM, IfAvailable "lvm2", TestOutput (
+ [["lvm_canonical_lv_name"; "/dev/mapper/VG-LV"]], "/dev/VG/LV");
+ InitBasicFSonLVM, IfAvailable "lvm2", TestOutput (
+ [["lvm_canonical_lv_name"; "/dev/VG/LV"]], "/dev/VG/LV")],
+ "get canonical name of an LV",
+ "\
+This converts alternative naming schemes for LVs that you
+might find to the canonical name. For example, C</dev/mapper/VG-LV>
+is converted to C</dev/VG/LV>.
+
+This command returns an error if the C<lvname> parameter does
+not refer to a logical volume.
+
+See also C<guestfs_is_lv>.");
+