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Code Releases Activity

A fix for issue #953 (#954)

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* A fix for issue #953

* Cleanup: Moved parts of the run method to sub-methods

* Moved code to aux methods

* Identation fixed

* Rephrased the comment about using exec

* Avoid using inline if-statements when possible
This commit is contained in:
Alexander Lochmann 2017-09-25 09:33:44 +02:00 committed by Felix Ableitner
parent 328b3ef273
commit 267c2598f8
1 changed files with 53 additions and 23 deletions
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76
src/main/java/com/nutomic/syncthingandroid/service/SyncthingRunnable.java
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@ -29,6 +29,7 @@ import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.util.Map;
import java.util.HashMap;
import java.util.concurrent.atomic.AtomicReference;
import eu.chainfire.libsuperuser.Shell;
@ -126,31 +127,10 @@ public class SyncthingRunnable implements Runnable {
try {
if (wakeLock != null)
wakeLock.acquire();
ProcessBuilder pb = (mUseRoot)
? new ProcessBuilder("su", "-c", TextUtils.join(" ", mCommand))
: new ProcessBuilder(mCommand);
Map<String, String> env = pb.environment();
// Set home directory to data folder for web GUI folder picker.
env.put("HOME", Environment.getExternalStorageDirectory().getAbsolutePath());
env.put("STTRACE", sp.getString("sttrace", ""));
File externalFilesDir = mContext.getExternalFilesDir(null);
if (externalFilesDir != null)
env.put("STGUIASSETS", externalFilesDir.getAbsolutePath() + "/gui");
env.put("STNORESTART", "1");
env.put("STNOUPGRADE", "1");
// Disable hash benchmark for faster startup.
// https://github.com/syncthing/syncthing/issues/4348
env.put("STHASHING", "minio");
if (sp.getBoolean("use_tor", false)) {
env.put("all_proxy", "socks5://localhost:9050");
env.put("ALL_PROXY_NO_FALLBACK", "1");
}
if (sp.getBoolean("use_legacy_hashing", false))
env.put("STHASHING", "standard");
putCustomEnvironmentVariables(env, sp);
HashMap<String, String> targetEnv = buildEnvironment(sp);
process = setupAndLaunch(targetEnv);
process = pb.start();
mSyncthing.set(process);
Thread lInfo = log(process.getInputStream(), Log.INFO, true);
@ -399,4 +379,54 @@ public class SyncthingRunnable implements Runnable {
}
}
private HashMap<String, String> buildEnvironment(SharedPreferences sp) {
HashMap<String, String> targetEnv = new HashMap<String, String>();
// Set home directory to data folder for web GUI folder picker.
targetEnv.put("HOME", Environment.getExternalStorageDirectory().getAbsolutePath());
targetEnv.put("STTRACE", sp.getString("sttrace", ""));
File externalFilesDir = mContext.getExternalFilesDir(null);
if (externalFilesDir != null)
targetEnv.put("STGUIASSETS", externalFilesDir.getAbsolutePath() + "/gui");
targetEnv.put("STNORESTART", "1");
targetEnv.put("STNOUPGRADE", "1");
// Disable hash benchmark for faster startup.
// https://github.com/syncthing/syncthing/issues/4348
targetEnv.put("STHASHING", "minio");
if (sp.getBoolean("use_tor", false)) {
targetEnv.put("all_proxy", "socks5://localhost:9050");
targetEnv.put("ALL_PROXY_NO_FALLBACK", "1");
}
if (sp.getBoolean("use_legacy_hashing", false))
targetEnv.put("STHASHING", "standard");
putCustomEnvironmentVariables(targetEnv, sp);
return targetEnv;
}
private Process setupAndLaunch(HashMap<String, String> env) throws IOException {
Process process = null;
if (mUseRoot) {
ProcessBuilder pb = new ProcessBuilder("su");
process = pb.start();
// The su binary prohibits the inheritance of environment variables.
// Even with --preserve-environment the environment gets messed up.
// We therefore start a root shell, and set all the environment variables manually.
DataOutputStream suOut = new DataOutputStream(process.getOutputStream());
for (Map.Entry<String, String> entry : env.entrySet()) {
suOut.writeBytes(String.format("export %s=\"%s\"\n", entry.getKey(), entry.getValue()));
}
suOut.flush();
// Exec will replace the su process image by Syncthing as execlp in C does.
// Without using exec, the process will drop to the root shell as soon as Syncthing terminates like a normal shell does.
// If we did not use exec, we would wait infinitely for the process to terminate (ret = process.waitFor(); in run()).
// With exec the whole process terminates when Syncthing exits.
suOut.writeBytes("exec " + TextUtils.join(" ", mCommand) + "\n");
suOut = null;
} else {
ProcessBuilder pb = new ProcessBuilder(mCommand);
pb.environment().putAll(env);
process = pb.start();
}
return process;
}
}