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/* Copyright (c) 2009, Nathan Freitas, Orbot / The Guardian Project - http://openideals.com/guardian */
/* See LICENSE for licensing information */
package info.guardianproject.onionkit.ui;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URLEncoder;
import java.util.StringTokenizer;
import android.util.Log;
public class TorServiceUtils {
private final static String TAG = "TorUtils";
// various console cmds
public final static String SHELL_CMD_CHMOD = "chmod";
public final static String SHELL_CMD_KILL = "kill -9";
public final static String SHELL_CMD_RM = "rm";
public final static String SHELL_CMD_PS = "ps";
public final static String SHELL_CMD_PIDOF = "pidof";
public final static String CHMOD_EXE_VALUE = "700";
public static boolean isRootPossible()
{
StringBuilder log = new StringBuilder();
try {
// Check if Superuser.apk exists
File fileSU = new File("/system/app/Superuser.apk");
if (fileSU.exists())
return true;
fileSU = new File("/system/app/superuser.apk");
if (fileSU.exists())
return true;
fileSU = new File("/system/bin/su");
if (fileSU.exists())
{
String[] cmd = {
"su"
};
int exitCode = TorServiceUtils.doShellCommand(cmd, log, false, true);
if (exitCode != 0)
return false;
else
return true;
}
// Check for 'su' binary
String[] cmd = {
"which su"
};
int exitCode = TorServiceUtils.doShellCommand(cmd, log, false, true);
if (exitCode == 0) {
Log.d(TAG, "root exists, but not sure about permissions");
return true;
}
} catch (IOException e) {
// this means that there is no root to be had (normally) so we won't
// log anything
Log.e(TAG, "Error checking for root access", e);
} catch (Exception e) {
Log.e(TAG, "Error checking for root access", e);
// this means that there is no root to be had (normally)
}
Log.e(TAG, "Could not acquire root permissions");
return false;
}
public static int findProcessId(String command)
{
int procId = -1;
try
{
procId = findProcessIdWithPidOf(command);
if (procId == -1)
procId = findProcessIdWithPS(command);
} catch (Exception e)
{
try
{
procId = findProcessIdWithPS(command);
} catch (Exception e2)
{
Log.e(TAG, "Unable to get proc id for command: " + URLEncoder.encode(command), e2);
}
}
return procId;
}
// use 'pidof' command
public static int findProcessIdWithPidOf(String command) throws Exception
{
int procId = -1;
Runtime r = Runtime.getRuntime();
Process procPs = null;
String baseName = new File(command).getName();
// fix contributed my mikos on 2010.12.10
procPs = r.exec(new String[] {
SHELL_CMD_PIDOF, baseName
});
// procPs = r.exec(SHELL_CMD_PIDOF);
BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null)
{
try
{
// this line should just be the process id
procId = Integer.parseInt(line.trim());
break;
} catch (NumberFormatException e)
{
Log.e("TorServiceUtils", "unable to parse process pid: " + line, e);
}
}
return procId;
}
// use 'ps' command
public static int findProcessIdWithPS(String command) throws Exception
{
int procId = -1;
Runtime r = Runtime.getRuntime();
Process procPs = null;
procPs = r.exec(SHELL_CMD_PS);
BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null)
{
if (line.indexOf(' ' + command) != -1)
{
StringTokenizer st = new StringTokenizer(line, " ");
st.nextToken(); // proc owner
procId = Integer.parseInt(st.nextToken().trim());
break;
}
}
return procId;
}
public static int doShellCommand(String[] cmds, StringBuilder log, boolean runAsRoot,
boolean waitFor) throws Exception
{
Process proc = null;
int exitCode = -1;
if (runAsRoot)
proc = Runtime.getRuntime().exec("su");
else
proc = Runtime.getRuntime().exec("sh");
OutputStreamWriter out = new OutputStreamWriter(proc.getOutputStream());
for (int i = 0; i < cmds.length; i++)
{
// TorService.logMessage("executing shell cmd: " + cmds[i] +
// "; runAsRoot=" + runAsRoot + ";waitFor=" + waitFor);
out.write(cmds[i]);
out.write("\n");
}
out.flush();
out.write("exit\n");
out.flush();
if (waitFor)
{
final char buf[] = new char[10];
// Consume the "stdout"
InputStreamReader reader = new InputStreamReader(proc.getInputStream());
int read = 0;
while ((read = reader.read(buf)) != -1) {
if (log != null)
log.append(buf, 0, read);
}
// Consume the "stderr"
reader = new InputStreamReader(proc.getErrorStream());
read = 0;
while ((read = reader.read(buf)) != -1) {
if (log != null)
log.append(buf, 0, read);
}
exitCode = proc.waitFor();
}
return exitCode;
}
}
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