80 lines
2.9 KiB
Java
80 lines
2.9 KiB
Java
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package net.i2p.router;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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/*
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* Provides querying of Windows services in order to discover I2P Routers
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* running as a service and avoid launching jpackaged routers redundantly.
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* It will prompt a user to start their I2P service if one is discovered.
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*
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* see also:
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* https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/sc-query
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* https://learn.microsoft.com/en-us/dotnet/api/system.serviceprocess.servicecontrollerstatus?view=dotnet-plat-ext-6.0
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* https://stackoverflow.com/questions/10604844/how-to-verify-whether-service-exists-in-services-msc C#, API ideas only
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* https://stackoverflow.com/questions/334471/need-a-way-to-check-status-of-windows-service-programmatically
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* https://stackoverflow.com/questions/5388888/find-status-of-windows-service-from-java-application
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* https://stackoverflow.com/questions/21566847/how-to-check-particular-windows-service-is-running-using
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* https://stackoverflow.com/questions/9792051/start-windows-service-with-java
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*
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* There's a chance we can't tell ServiceController to do anything so if
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* that is the case then we'll just launch services.msc and tell the user to
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* take it from there.
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*
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* @author idk
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* @since 1.9.7
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*/
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public class WindowsServiceUtil {
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public WindowsServiceUtil() {}
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private String queryService(String serviceName) {
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String result = "";
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String line;
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ProcessBuilder pb = new ProcessBuilder("sc", "query", serviceName);
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try {
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Process p = pb.start();
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try {
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p.waitFor(); // wait for process to finish then continue.
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BufferedReader bri =
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new BufferedReader(new InputStreamReader(p.getInputStream()));
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while ((line = bri.readLine()) != null) {
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result += line;
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}
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} catch (InterruptedException e) {
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} catch (IOException e) {
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}
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} catch (IOException e) {
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}
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return result;
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}
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public String getServiceState(String serviceName) {
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String STATE_PREFIX = "STATE : ";
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String s = queryService(serviceName);
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// check that the temp string contains the status prefix
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int ix = s.indexOf(STATE_PREFIX);
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String stateString = "uninstalled";
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if (ix >= 0) {
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// compare status number to one of the states
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String stateStr = s.substring(ix + STATE_PREFIX.length(),
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ix + STATE_PREFIX.length() + 1);
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int state = Integer.parseInt(stateStr);
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switch (state) {
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case (1): // service stopped
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stateString = "stopped";
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break;
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case (2): // service starting
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stateString = "starting";
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break;
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case (3): // don't know yet
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//stateString = "started";
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break;
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case (4): // service started
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stateString = "started";
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break;
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}
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}
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return stateString;
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}
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}
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