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jc/jc/parsers/lsblk.py
Kelly Brazil d2ccad6a83 fix for no data
2020-06-11 17:09:51 -07:00

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"""jc - JSON CLI output utility lsblk Parser
Usage:
specify --lsblk as the first argument if the piped input is coming from lsblk
Compatibility:
'linux'
Examples:
$ lsblk | jc --lsblk -p
[
{
"name": "sda",
"maj_min": "8:0",
"rm": false,
"size": "20G",
"ro": false,
"type": "disk",
"mountpoint": null
},
{
"name": "sda1",
"maj_min": "8:1",
"rm": false,
"size": "1G",
"ro": false,
"type": "part",
"mountpoint": "/boot"
},
...
]
$ lsblk -o +KNAME,FSTYPE,LABEL,UUID,PARTLABEL,PARTUUID,RA,MODEL,SERIAL,STATE,OWNER,GROUP,MODE,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,ROTA,SCHED,RQ-SIZE,DISC-ALN,DISC-GRAN,DISC-MAX,DISC-ZERO,WSAME,WWN,RAND,PKNAME,HCTL,TRAN,REV,VENDOR | jc --lsblk -p
[
{
"name": "sda",
"maj_min": "8:0",
"rm": false,
"size": "20G",
"ro": false,
"type": "disk",
"mountpoint": null,
"kname": "sda",
"fstype": null,
"label": null,
"uuid": null,
"partlabel": null,
"partuuid": null,
"ra": 4096,
"model": "VMware Virtual S",
"serial": null,
"state": "running",
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": 0,
"min_io": 512,
"opt_io": 0,
"phy_sec": 512,
"log_sec": 512,
"rota": true,
"sched": "deadline",
"rq_size": 128,
"disc_aln": 0,
"disc_gran": "0B",
"disc_max": "0B",
"disc_zero": false,
"wsame": "32M",
"wwn": null,
"rand": true,
"pkname": null,
"hctl": "0:0:0:0",
"tran": "spi",
"rev": "1.0",
"vendor": "VMware,"
},
{
"name": "sda1",
"maj_min": "8:1",
"rm": false,
"size": "1G",
"ro": false,
"type": "part",
"mountpoint": "/boot",
"kname": "sda1",
"fstype": "xfs",
"label": null,
"uuid": "05d927bb-5875-49e3-ada1-7f46cb31c932",
"partlabel": null,
"partuuid": null,
"ra": 4096,
"model": null,
"serial": null,
"state": null,
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": 0,
"min_io": 512,
"opt_io": 0,
"phy_sec": 512,
"log_sec": 512,
"rota": true,
"sched": "deadline",
"rq_size": 128,
"disc_aln": 0,
"disc_gran": "0B",
"disc_max": "0B",
"disc_zero": false,
"wsame": "32M",
"wwn": null,
"rand": true,
"pkname": "sda",
"hctl": null,
"tran": null,
"rev": null,
"vendor": null
},
...
]
$ lsblk -o +KNAME,FSTYPE,LABEL,UUID,PARTLABEL,PARTUUID,RA,MODEL,SERIAL,STATE,OWNER,GROUP,MODE,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,ROTA,SCHED,RQ-SIZE,DISC-ALN,DISC-GRAN,DISC-MAX,DISC-ZERO,WSAME,WWN,RAND,PKNAME,HCTL,TRAN,REV,VENDOR | jc --lsblk -p -r
[
{
"name": "sda",
"maj_min": "8:0",
"rm": "0",
"size": "20G",
"ro": "0",
"type": "disk",
"mountpoint": null,
"kname": "sda",
"fstype": null,
"label": null,
"uuid": null,
"partlabel": null,
"partuuid": null,
"ra": "4096",
"model": "VMware Virtual S",
"serial": null,
"state": "running",
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": "0",
"min_io": "512",
"opt_io": "0",
"phy_sec": "512",
"log_sec": "512",
"rota": "1",
"sched": "deadline",
"rq_size": "128",
"disc_aln": "0",
"disc_gran": "0B",
"disc_max": "0B",
"disc_zero": "0",
"wsame": "32M",
"wwn": null,
"rand": "1",
"pkname": null,
"hctl": "0:0:0:0",
"tran": "spi",
"rev": "1.0",
"vendor": "VMware,"
},
{
"name": "sda1",
"maj_min": "8:1",
"rm": "0",
"size": "1G",
"ro": "0",
"type": "part",
"mountpoint": "/boot",
"kname": "sda1",
"fstype": "xfs",
"label": null,
"uuid": "05d927bb-5875-49e3-ada1-7f46cb31c932",
"partlabel": null,
"partuuid": null,
"ra": "4096",
"model": null,
"serial": null,
"state": null,
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": "0",
"min_io": "512",
"opt_io": "0",
"phy_sec": "512",
"log_sec": "512",
"rota": "1",
"sched": "deadline",
"rq_size": "128",
"disc_aln": "0",
"disc_gran": "0B",
"disc_max": "0B",
"disc_zero": "0",
"wsame": "32M",
"wwn": null,
"rand": "1",
"pkname": "sda",
"hctl": null,
"tran": null,
"rev": null,
"vendor": null
},
...
]
"""
import jc.utils
import jc.parsers.universal
class info():
version = '1.4'
description = 'lsblk command parser'
author = 'Kelly Brazil'
author_email = 'kellyjonbrazil@gmail.com'
# compatible options: linux, darwin, cygwin, win32, aix, freebsd
compatible = ['linux']
magic_commands = ['lsblk']
__version__ = info.version
def process(proc_data):
"""
Final processing to conform to the schema.
Parameters:
proc_data: (dictionary) raw structured data to process
Returns:
List of dictionaries. Structured data with the following schema:
[
{
"name": string,
"maj_min": string,
"rm": boolean,
"size": string,
"ro": boolean,
"type": string,
"mountpoint": string,
"kname": string,
"fstype": string,
"label": string,
"uuid": string,
"partlabel": string,
"partuuid": string,
"ra": integer,
"model": string,
"serial": string,
"state": string,
"owner": string,
"group": string,
"mode": string,
"alignment": integer,
"min_io": integer,
"opt_io": integer,
"phy_sec": integer,
"log_sec": integer,
"rota": boolean,
"sched": string,
"rq_size": integer,
"disc_aln": integer,
"disc_gran": string,
"disc_max": string,
"disc_zero": boolean,
"wsame": string,
"wwn": string,
"rand": boolean,
"pkname": string,
"hctl": string,
"tran": string,
"rev": string,
"vendor": string
}
]
"""
for entry in proc_data:
# boolean changes
bool_list = ['rm', 'ro', 'rota', 'disc_zero', 'rand']
for key in bool_list:
if key in entry:
try:
key_bool = bool(int(entry[key]))
entry[key] = key_bool
except (ValueError):
entry[key] = None
# integer changes
int_list = ['ra', 'alignment', 'min_io', 'opt_io', 'phy_sec', 'log_sec', 'rq_size', 'disc_aln']
for key in int_list:
if key in entry:
try:
key_int = int(entry[key])
entry[key] = key_int
except (ValueError):
entry[key] = None
return proc_data
def parse(data, raw=False, quiet=False):
"""
Main text parsing function
Parameters:
data: (string) text data to parse
raw: (boolean) output preprocessed JSON if True
quiet: (boolean) suppress warning messages if True
Returns:
List of dictionaries. Raw or processed structured data.
"""
if not quiet:
jc.utils.compatibility(__name__, info.compatible)
linedata = data.splitlines()
# Clear any blank lines
cleandata = list(filter(None, linedata))
raw_output = []
if cleandata:
cleandata = data.splitlines()
cleandata[0] = cleandata[0].lower()
cleandata[0] = cleandata[0].replace(':', '_')
cleandata[0] = cleandata[0].replace('-', '_')
raw_output = jc.parsers.universal.sparse_table_parse(cleandata)
# clean up non-ascii characters, if any
for entry in raw_output:
entry['name'] = entry['name'].encode('ascii', errors='ignore').decode()
if raw:
return raw_output
else:
return process(raw_output)
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