oshi.driver.unix.aix.Ls Maven / Gradle / Ivy
/*
* Copyright 2020-2022 The OSHI Project Contributors
* SPDX-License-Identifier: MIT
*/
package oshi.driver.unix.aix;
import java.util.HashMap;
import java.util.Map;
import oshi.annotation.concurrent.ThreadSafe;
import oshi.util.ExecutingCommand;
import oshi.util.ParseUtil;
import oshi.util.tuples.Pair;
/**
* Utility to query ls
*/
@ThreadSafe
public final class Ls {
private Ls() {
}
/**
* Query {@code ls} to get parition info
*
* @return A map of device name to a major-minor pair
*/
public static Map> queryDeviceMajorMinor() {
// Map major and minor from ls
/*-
$ ls -l /dev
brw-rw---- 1 root system 10, 5 Sep 12 2017 hd2
brw------- 1 root system 20, 0 Jun 28 1970 hdisk0
*/
Map> majMinMap = new HashMap<>();
for (String s : ExecutingCommand.runNative("ls -l /dev")) {
// Filter to block devices
if (!s.isEmpty() && s.charAt(0) == 'b') {
// Device name is last space-delim string
int idx = s.lastIndexOf(' ');
if (idx > 0 && idx < s.length()) {
String device = s.substring(idx + 1);
int major = ParseUtil.getNthIntValue(s, 2);
int minor = ParseUtil.getNthIntValue(s, 3);
majMinMap.put(device, new Pair<>(major, minor));
}
}
}
return majMinMap;
}
}