Mercurial > hg > release > thermostat-2.0
view agent/command/src/main/java/com/redhat/thermostat/agent/command/internal/ProcessUserInfoBuilder.java @ 2575:902e2e96f4e8
A preliminary port of Thermostat to macos.
It is quite usable except for statistics that query the OS (like memory and IO usage over time).
The main unfinished business:
- native code for memory and IO usage
- JUnit
- GUI often hangs on exit.
- Mac .app bundle build
Reviewed-by: neugens
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-January/022086.html
author | Simon Tooke <stooke@redhat.com> |
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date | Mon, 30 Jan 2017 13:06:07 -0500 |
parents | e7fd8adb5f9c |
children |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.agent.command.internal; import com.redhat.thermostat.shared.config.OS; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; /* * FIXME: This class was copied from system-backend. * Replace when this information is available from an API. */ class ProcessUserInfoBuilder { private static final String PROC_STATUS_SELF_PATH = "/proc/self/status"; private static final String PROC_STATUS_UID = "Uid:"; private final FileReaderCreator readerCreator; ProcessUserInfoBuilder() { this(new FileReaderCreator()); } ProcessUserInfoBuilder(FileReaderCreator readerCreator) { this.readerCreator = readerCreator; } private long getUid() throws IOException { FileReader reader = readerCreator.create(PROC_STATUS_SELF_PATH); long uid = getUidFromProcfs(new BufferedReader(reader)); return uid; } boolean isPrivilegedUser() throws IOException { return OS.IS_LINUX ? (getUid() == 0) : false; } /* * Look for the following line: * Uid: <RealUid> <EffectiveUid> <SavedUid> <FSUid> */ private long getUidFromProcfs(BufferedReader br) throws IOException { long uid = -1; String line; while ((line = br.readLine()) != null) { line = line.trim(); if (line.startsWith(PROC_STATUS_UID)) { String[] parts = line.split("\\s+"); if (parts.length == 5) { try { // Use Real UID uid = Long.parseLong(parts[1]); } catch (NumberFormatException e) { throw new IOException("Unexpected output from ps command", e); } } else { throw new IOException("Expected 5 parts from split /proc/${pid}/status output, got " + parts.length); } } } if (uid < 0) { throw new IOException("Unable to determine UID from /proc/${pid}/status"); } return uid; } // For testing purposes static class FileReaderCreator { FileReader create(String path) throws IOException { return new FileReader(new File(path)); } } }