+++ This bug was initially created as a clone of Bug #1008417 +++

Description of problem:
1. For sgdisk, -t, --typecode=partnum:{hexcode|GUID}, it can accept hexcode as input
   For guestfish, we'd better update the helpout of part-set-gpt-type according to sgdisk, tells that hexcode is valid, command does not return error.

2. If gives a non-guid format value, sgdisk will give a default guid, like:
# sgdisk /dev/sdb -t 1:f
Exact type match not found for type code 000F; assigning type code for
'Linux filesystem'

For part-set-gpt-type, if gives a non-guid format value for gpt, the default value is returned, it's equal to mbr's guid (0FC63DAF-8483-4772-8E79-3D69D8477DE4).
it does not match gpt, we also need update helpout for this

 
Version-Release number of selected component (if applicable):
libguestfs-1.22.6-8.el7.x86_64


How reproducible:
100%

 
Steps to Reproduce:
1. check for mbr
><fs> part-disk /dev/sda mbr
><fs> part-get-gpt-type /dev/sda 1
0FC63DAF-8483-4772-8E79-3D69D8477DE4

2. check for gpt
><fs> part-disk /dev/sda gpt
><fs> part-get-gpt-type /dev/sda 1
EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

3. set an invalid guid for gpt
><fs> part-set-gpt-type /dev/sda 1 f
><fs> part-get-gpt-type /dev/sda 1
0FC63DAF-8483-4772-8E79-3D69D8477DE4


Actual result:


Expect result:


Additional info:

--- Additional comment from Richard W.M. Jones on 2013-09-26 06:07:52 EDT ---

Reassigning to Matt who wrote the code and uses the API.

https://github.com/libguestfs/libguestfs/blob/7c535c501b1ce131ae98dd948b22fc260d659d1b/daemon/parted.c#L761

Matt: Should we check if the guid parameter is invalid
and bail out?

--- Additional comment from Matthew Booth on 2013-10-03 09:48:42 EDT ---

I'd say yes. That way we're less likely to be affected by changes in the behaviour of gdisk.

--- Additional comment from Pino Toscano on 2014-02-10 08:08:54 EST ---

This has been fixed with the following commits:
https://github.com/libguestfs/libguestfs/commit/beef77403cd9d634b6ff6daa9f33d292e2d320a7
https://github.com/libguestfs/libguestfs/commit/b10dd601fb07eb3d8bf76b5f9fcac1c7fe59d4d5
https://github.com/libguestfs/libguestfs/commit/775cad63a3f2156b38e7d8360b88ed11615779e8
https://github.com/libguestfs/libguestfs/commit/a948389ce9c76bf7e8997bb27f3daac06cb20c50
which are in libguestfs >= 1.25.34.