oshi.driver.unix.aix.Ls Maven / Gradle / Ivy
/**
* MIT License
*
* Copyright (c) 2010 - 2020 The OSHI Project Contributors: https://github.com/oshi/oshi/graphs/contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
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;
}
}