lsblk issue on CentOs 7

[zerowebcorp]

Hello,
I have used this in one of our apps which has been deployed on a CentOs 7 OS. This is failing because the command "lsblk -f -J" doesn't return a valid result on CentOS

`[root@eu~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)
[root@eu-p-mongo-2 ~]# lsblk -f -J
lsblk: invalid option -- 'J'

Usage:
lsblk [options] [ ...]

Options:
-a, --all print all devices
-b, --bytes print SIZE in bytes rather than in human readable format
-d, --nodeps don't print slaves or holders
-D, --discard print discard capabilities
-e, --exclude exclude devices by major number (default: RAM disks)
-I, --include show only devices with specified major numbers
-f, --fs output info about filesystems
-h, --help usage information (this)
-i, --ascii use ascii characters only
-m, --perms output info about permissions
-l, --list use list format output
-n, --noheadings don't print headings
-o, --output output columns
-p, --paths print complate device path
-P, --pairs use key="value" output format
-r, --raw use raw output format
-s, --inverse inverse dependencies
-t, --topology output info about topology
-S, --scsi output info about SCSI devices

-h, --help display this help and exit
-V, --version output version information and exit

Available columns (for --output):
NAME device name
KNAME internal kernel device name
MAJ:MIN major:minor device number
FSTYPE filesystem type
MOUNTPOINT where the device is mounted
LABEL filesystem LABEL
UUID filesystem UUID
PARTLABEL partition LABEL
PARTUUID partition UUID
RA read-ahead of the device
RO read-only device
RM removable device
MODEL device identifier
SERIAL disk serial number
SIZE size of the device
STATE state of the device
OWNER user name
GROUP group name
MODE device node permissions
ALIGNMENT alignment offset
MIN-IO minimum I/O size
OPT-IO optimal I/O size
PHY-SEC physical sector size
LOG-SEC logical sector size
ROTA rotational device
SCHED I/O scheduler name
RQ-SIZE request queue size
TYPE device type
DISC-ALN discard alignment offset
DISC-GRAN discard granularity
DISC-MAX discard max bytes
DISC-ZERO discard zeroes data
WSAME write same max bytes
WWN unique storage identifier
RAND adds randomness
PKNAME internal parent kernel device name
HCTL Host:Channel:Target:Lun for SCSI
TRAN device transport type
REV device revision
VENDOR device vendor

For more details see lsblk(8).
[root@eu ~]#
`

[Praveen-g99]

I am also facing same issue.

[Praveen-g99]

lsblk: invalid option -- 'J'

Usage:
lsblk [options] [ ...]

Options:
-a, --all print all devices
-b, --bytes print SIZE in bytes rather than in human readable format
-d, --nodeps don't print slaves or holders
-D, --discard print discard capabilities
-e, --exclude exclude devices by major number (default: RAM disks)
-I, --include show only devices with specified major numbers
-f, --fs output info about filesystems
-h, --help usage information (this)
-i, --ascii use ascii characters only
-m, --perms output info about permissions
-l, --list use list format output
-n, --noheadings don't print headings
-o, --output output columns
-p, --paths print complate device path
-P, --pairs use key="value" output format
-r, --raw use raw output format
-s, --inverse inverse dependencies
-t, --topology output info about topology
-S, --scsi output info about SCSI devices

-h, --help display this help and exit
-V, --version output version information and exit

Available columns (for --output):
NAME device name
KNAME internal kernel device name
MAJ:MIN major:minor device number
FSTYPE filesystem type
MOUNTPOINT where the device is mounted
LABEL filesystem LABEL
UUID filesystem UUID
PARTLABEL partition LABEL
PARTUUID partition UUID
RA read-ahead of the device
RO read-only device
RM removable device
MODEL device identifier
SERIAL disk serial number
SIZE size of the device
STATE state of the device
OWNER user name
GROUP group name
MODE device node permissions
ALIGNMENT alignment offset
MIN-IO minimum I/O size
OPT-IO optimal I/O size
PHY-SEC physical sector size
LOG-SEC logical sector size
ROTA rotational device
SCHED I/O scheduler name
RQ-SIZE request queue size
TYPE device type
DISC-ALN discard alignment offset
DISC-GRAN discard granularity
DISC-MAX discard max bytes
DISC-ZERO discard zeroes data
WSAME write same max bytes
WWN unique storage identifier
RAND adds randomness
PKNAME internal parent kernel device name
HCTL Host:Channel:Target:Lun for SCSI
TRAN device transport type
REV device revision
VENDOR device vendor

For more details see lsblk(8).
Unhandled exception. System.Text.Json.JsonException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
---> System.Text.Json.JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan1 bytes) at System.Text.Json.Utf8JsonReader.Read() at System.Text.Json.Serialization.JsonConverter1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
--- End of inner exception stack trace ---
at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)
at System.Text.Json.Serialization.JsonConverter1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan1 utf8Json, JsonTypeInfo jsonTypeInfo, Nullable1 actualByteCount) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan1 json, JsonTypeInfo jsonTypeInfo)
at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
at DeviceId.Linux.Components.LinuxRootDriveSerialNumberDeviceIdComponent.GetValue()
at DeviceId.Formatters.HashDeviceIdFormatter.<>c.b__3_1(KeyValuePair2 x) at System.Linq.Enumerable.SelectIPartitionIterator2.PreallocatingToArray(Int32 count)
at System.Linq.Enumerable.SelectIPartitionIterator2.ToArray() at System.Linq.Enumerable.ToArray[TSource](IEnumerable1 source)
at DeviceId.Formatters.HashDeviceIdFormatter.GetDeviceId(IDictionary`2 components)
at DeviceId.DeviceIdBuilder.ToString()
at uOPCSuite.DeviceId.Program.Main(String[] args) in D:\uOPCSuite.DeviceId\Program.cs:line 10
Aborted (core dumped)

[weidesh]

looks like CentOS 7.9 is using lsblk from util-linux 2.23.2

until util-linux v2.27 util-linux v2.27 Release Note the --json was added to lsblk by Karel Zak
it is an incompatible version of lsblk, or the CentOS 7.9 is not directly supported. A workaround is required.

[MatthewKing]

This is something that is going to require community contribution from a regular Linux user.

[weidesh]

yeah, that's definitely.