Himato
commented
9 months ago I encountered the same issue in RHEL and I think it's because CentOS/RHEL 7 doesn't support the -J option, as the JSON output option was introduced in later versions. I think we can just print these values (NAME,MOUNTPOINT) and make a custom serializer for backward compatibility with older versions.
Below you can find Error details.
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, ReadOnlySpanb__3_1(KeyValuePair
1 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.2 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)