oshi.driver.mac.Who Maven / Gradle / Ivy
/*
* Copyright 2020-2023 The OSHI Project Contributors
* SPDX-License-Identifier: MIT
*/
package oshi.driver.mac;
import static oshi.jna.platform.unix.CLibrary.LOGIN_PROCESS;
import static oshi.jna.platform.unix.CLibrary.USER_PROCESS;
import static oshi.util.Util.isSessionValid;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import com.sun.jna.Native;
import oshi.annotation.concurrent.ThreadSafe;
import oshi.jna.platform.mac.SystemB;
import oshi.jna.platform.mac.SystemB.MacUtmpx;
import oshi.software.os.OSSession;
/**
* Utility to query logged in users.
*/
@ThreadSafe
public final class Who {
private static final SystemB SYS = SystemB.INSTANCE;
private Who() {
}
/**
* Query {@code getutxent} to get logged in users.
*
* @return A list of logged in user sessions
*/
public static synchronized List queryUtxent() {
List whoList = new ArrayList<>();
MacUtmpx ut;
// Rewind
SYS.setutxent();
try { // Iterate
while ((ut = SYS.getutxent()) != null) {
if (ut.ut_type == USER_PROCESS || ut.ut_type == LOGIN_PROCESS) {
String user = Native.toString(ut.ut_user, StandardCharsets.US_ASCII);
String device = Native.toString(ut.ut_line, StandardCharsets.US_ASCII);
String host = Native.toString(ut.ut_host, StandardCharsets.US_ASCII);
long loginTime = ut.ut_tv.tv_sec.longValue() * 1000L + ut.ut_tv.tv_usec / 1000L;
// Sanity check. If errors, default to who command line
if (!isSessionValid(user, device, loginTime)) {
return oshi.driver.unix.Who.queryWho();
}
whoList.add(new OSSession(user, device, loginTime, host));
}
}
} finally {
// Close
SYS.endutxent();
}
return whoList;
}
}