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oshi.driver.unix.openbsd.disk.Disklabel Maven / Gradle / Ivy
/*
* Copyright 2021-2022 The OSHI Project Contributors
* SPDX-License-Identifier: MIT
*/
package oshi.driver.unix.openbsd.disk;
import java.util.ArrayList;
import java.util.List;
import oshi.annotation.concurrent.ThreadSafe;
import oshi.hardware.HWPartition;
import oshi.util.Constants;
import oshi.util.ExecutingCommand;
import oshi.util.ParseUtil;
import oshi.util.tuples.Pair;
import oshi.util.tuples.Quartet;
/**
* Utility class parsing partition information from disklabel command
*/
@ThreadSafe
public final class Disklabel {
private Disklabel() {
}
/**
* Gets disk and partition information
*
* @param diskName The disk to fetch partition information from
* @return A quartet containing the disk's name/label, DUID, size, and a list of partitions
*/
public static Quartet> getDiskParams(String diskName) {
// disklabel (requires root) supports 15 configurable partitions, `a' through
// `p', excluding `c'.
// The `c' partition describes the entire physical disk.
// By convention, the `a' partition of the boot disk is the root
// partition, and the `b' partition of the boot disk is the swap partition,
// and the 'i' partition is usually the boot record
// Create a list for all the other partitions
List partitions = new ArrayList<>();
// Save some values to return to the caller to populate HWDiskStore values
String totalMarker = "total sectors:";
long totalSectors = 1L;
String bpsMarker = "bytes/sector:";
int bytesPerSector = 1;
String labelMarker = "label:";
String label = "";
String duidMarker = "duid:";
String duid = "";
for (String line : ExecutingCommand.runNative("disklabel -n " + diskName)) {
// Check for values in the header we need for the HWDiskstore
// # /dev/rsd1c:
// type: SCSI
// disk: SCSI disk
// label: Storage Device
// duid: 0000000000000000
// flags:
// bytes/sector: 512
// sectors/track: 63
// tracks/cylinder: 255
// sectors/cylinder: 16065
// cylinders: 976
// total sectors: 15693824
// boundstart: 0
// boundend: 15693824
// drivedata: 0
if (line.contains(totalMarker)) {
totalSectors = ParseUtil.getFirstIntValue(line);
} else if (line.contains(bpsMarker)) {
bytesPerSector = ParseUtil.getFirstIntValue(line);
} else if (line.contains(labelMarker)) {
label = line.split(labelMarker)[1].trim();
} else if (line.contains(duidMarker)) {
duid = line.split(duidMarker)[1].trim();
}
/*-
16 partitions:
# size offset fstype [fsize bsize cpg]
a: 2097152 1024 4.2BSD 2048 16384 12958 # /
b: 17023368 2098176 swap # none
c: 500118192 0 unused
d: 8388576 19121568 4.2BSD 2048 16384 12958 # /tmp
e: 41386752 27510144 4.2BSD 2048 16384 12958 # /var
f: 4194304 68896896 4.2BSD 2048 16384 12958 # /usr
g: 2097152 73091200 4.2BSD 2048 16384 12958 # /usr/X11R6
h: 20971520 75188352 4.2BSD 2048 16384 12958 # /usr/local
i: 960 64 MSDOS
j: 4194304 96159872 4.2BSD 2048 16384 12958 # /usr/src
k: 12582912 100354176 4.2BSD 2048 16384 12958 # /usr/obj
l: 387166336 112937088 4.2BSD 4096 32768 26062 # /home
Note size is in sectors
*/
if (line.trim().indexOf(':') == 1) {
// partition table values have a single letter followed by a colon
String[] split = ParseUtil.whitespaces.split(line.trim(), 9);
String name = split[0].substring(0, 1);
// get major and minor from stat
Pair majorMinor = getMajorMinor(diskName, name);
// add partitions
if (split.length > 4) {
partitions.add(new HWPartition(diskName + name, name, split[3], duid + "." + name,
ParseUtil.parseLongOrDefault(split[1], 0L) * bytesPerSector, majorMinor.getA(),
majorMinor.getB(), split.length > 5 ? split[split.length - 1] : ""));
}
}
}
if (partitions.isEmpty()) {
return getDiskParamsNoRoot(diskName);
}
return new Quartet<>(label, duid, totalSectors * bytesPerSector, partitions);
}
private static Quartet> getDiskParamsNoRoot(String diskName) {
List partitions = new ArrayList<>();
for (String line : ExecutingCommand.runNative("df")) {
if (line.startsWith("/dev/" + diskName)) {
String[] split = ParseUtil.whitespaces.split(line);
String name = split[0].substring(5 + diskName.length());
Pair majorMinor = getMajorMinor(diskName, name);
if (split.length > 5) {
long partSize = ParseUtil.parseLongOrDefault(split[1], 1L) * 512L;
partitions.add(new HWPartition(split[0], split[0].substring(5), Constants.UNKNOWN,
Constants.UNKNOWN, partSize, majorMinor.getA(), majorMinor.getB(), split[5]));
}
}
}
return new Quartet<>(Constants.UNKNOWN, Constants.UNKNOWN, 0L, partitions);
}
private static Pair getMajorMinor(String diskName, String name) {
int major = 0;
int minor = 0;
String majorMinor = ExecutingCommand.getFirstAnswer("stat -f %Hr,%Lr /dev/" + diskName + name);
int comma = majorMinor.indexOf(',');
if (comma > 0 && comma < majorMinor.length()) {
major = ParseUtil.parseIntOrDefault(majorMinor.substring(0, comma), 0);
minor = ParseUtil.parseIntOrDefault(majorMinor.substring(comma + 1), 0);
}
return new Pair<>(major, minor);
}
}
