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Sort returned drive letters by storage number

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This commit is contained in:
Kovid Goyal 2016-01-18 10:52:25 +05:30
parent 24ca02f569
commit d65b7a715c
1 changed files with 14 additions and 6 deletions
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20
src/calibre/devices/winusb.py
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@ -533,12 +533,14 @@ def get_removable_drives(debug=False): # {{{
def get_drive_letters_for_device(vendor_id, product_id, bcd=None, storage_number_map=None, debug=False): # {{{
'''
Get the drive letters for a connected device with the specieid USB ids. bcd
Get the drive letters for a connected device with the specified USB ids. bcd
can be either None, in which case it is not tested, or it must be a list or
set like object containing bcds.
set like object containing bcds. The drive letters are sorted by storage number,
which (I think) corresponds to the order they are exported by the firmware.
'''
rbuf = None
ans = []
ans = {'pnp_id_map': {}, 'drive_letters':[]}
sort_map = {}
# First search for a device matching the specified USB ids
for dev_list, devinfo in DeviceSet(enumerator='USB', flags=DIGCF_PRESENT | DIGCF_ALLCLASSES).devices():
@ -581,9 +583,15 @@ def get_drive_letters_for_device(vendor_id, product_id, bcd=None, storage_number
prints('Storage number for %s: %s' % (devid, storage_number))
if storage_number:
partitions = sn_map.get(storage_number[:2])
drive_letters = [x[1] for x in partitions or ()]
ans.extend(drive_letters)
drive_letters = []
for partition_number, dl in partitions or ():
drive_letters.append(dl)
sort_map[dl] = storage_number.number, partition_number
if drive_letters:
for dl in drive_letters:
ans['pnp_id_map'][dl] = devpath
ans['drive_letters'].append(dl)
ans['drive_letters'].sort(key=sort_map.get)
return ans
_devid_pat = None