Class Disklabel

java.lang.Object

oshi.driver.common.unix.bsd.disk.Disklabel

@ThreadSafe
public final class Disklabel
extends Object

Utility class parsing partition information from the BSD disklabel command. Shared by OpenBSD and NetBSD, which produce the same disklabel output format.

Method Summary

Modifier and Type	Method	Description
static Quartet<String, String, Long, List<HWPartition>>	getDiskParams(String diskName)	Gets disk and partition information by running disklabel and parsing its output.
static Quartet<String, String, Long, List<HWPartition>>	parseDfFallback(String diskName, List<String> dfLines, BiFunction<String, String, Pair<Integer,Integer>> majorMinorLookup)	Parses df output as a fallback when disklabel returns no partitions (typically because the caller lacks root privileges).
static Quartet<String, String, Long, List<HWPartition>>	parseDiskParams(String diskName, List<String> disklabelLines, BiFunction<String, String, Pair<Integer,Integer>> majorMinorLookup)	Parses disklabel -n output to extract disk metadata and partitions.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getDiskParams

public static Quartet<String, String, Long, List<HWPartition>> getDiskParams(String diskName)

Gets disk and partition information by running disklabel and parsing its output. Falls back to df if no partitions are returned (e.g., when not running as root).

Parameters:

diskName - The disk to fetch partition information from

Returns:

A quartet containing the disk's name/label, DUID, size, and a list of partitions

parseDiskParams

public static Quartet<String, String, Long, List<HWPartition>> parseDiskParams(String diskName,
 List<String> disklabelLines,
 BiFunction<String, String, Pair<Integer,Integer>> majorMinorLookup)

Parses disklabel -n output to extract disk metadata and partitions.

Parameters:

diskName - the disk being labeled

disklabelLines - raw output from disklabel -n <diskName>

majorMinorLookup - function that resolves a (disk, partition-letter) pair to a (major, minor) device number pair; tests may pass a stub that returns (0,0) without invoking stat.

Returns:

A quartet of label, DUID, size in bytes, and partitions. An empty partition list signals the caller should fall back to parseDfFallback(String, List, BiFunction).

parseDfFallback

public static Quartet<String, String, Long, List<HWPartition>> parseDfFallback(String diskName,
 List<String> dfLines,
 BiFunction<String, String, Pair<Integer,Integer>> majorMinorLookup)

Parses df output as a fallback when disklabel returns no partitions (typically because the caller lacks root privileges).

Parameters:

diskName - the disk whose partitions are being enumerated

dfLines - raw output from df

majorMinorLookup - function that resolves a (disk, partition-letter) pair to a (major, minor) device number pair

Returns:

A quartet of UNKNOWN label/DUID, 0 size, and partitions discovered from df. Callers that already have disklabel header metadata should combine it with the partition list from this result.