def blkid(devs=None, cache=True):
"""
get data about block devices from blkid and convert to dict
"""
if devs is None:
devs = []
# 14.04 blkid reads undocumented /dev/.blkid.tab
# man pages mention /run/blkid.tab and /etc/blkid.tab
if not cache:
cfiles = ("/run/blkid/blkid.tab", "/dev/.blkid.tab", "/etc/blkid.tab")
for cachefile in cfiles:
if os.path.exists(cachefile):
os.unlink(cachefile)
cmd = ['blkid', '-o', 'full']
cmd.extend(devs)
# blkid output is <device_path>: KEY=VALUE
# where KEY is TYPE, UUID, PARTUUID, LABEL
out, err = util.subp(cmd, capture=True)
data = {}
for line in out.splitlines():
curdev, curdata = line.split(":", 1)
data[curdev] = dict(
tok.split('=', 1) for tok in util.shlex_split(curdata))
return data
def _lsblock_pairs_to_dict(lines):
"""
parse lsblock output and convert to dict
"""
ret = {}
for line in lines.splitlines():
toks = util.shlex_split(line)
cur = {}
for tok in toks:
k, v = tok.split("=", 1)
cur[k] = v
# use KNAME, as NAME may include spaces and other info,
# for example, lvm decices may show 'dm0 lvm1'
cur['device_path'] = get_dev_name_entry(cur['KNAME'])[1]
ret[cur['KNAME']] = cur
return ret
