CMDProcessor.java

package com.dsht.kernetweaker.cmdprocessor;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;

import com.dsht.open.Constants;

import android.util.Log;

// convenience import for quick referencing of this method

public final class CMDProcessor implements Constants {
    private static final String TAG = "CMDProcessor";

    private Boolean can_su;
    public sh sh;
    public sh su;

    public CMDProcessor() {
        // Cannot instantiate this class
    	sh = new sh("sh");
        su = new sh("su");
        //throw new AssertionError();
    }
   

    /* Run a system command with full redirection */
    public static ChildProcess startSysCmd(String[] cmdarray, String childStdin) {
        return new ChildProcess(cmdarray, childStdin);
    }

    public static CommandResult runSysCmd(String[] cmdarray, String childStdin) {
        ChildProcess proc = startSysCmd(cmdarray, childStdin);
        proc.waitFinished();
        return proc.getResult();
    }

    public static ChildProcess startShellCommand(String cmd) {
        String[] cmdarray = new String[3];
        cmdarray[0] = "sh";
        cmdarray[1] = "-c";
        cmdarray[2] = cmd;
        return startSysCmd(cmdarray, null);
    }

    public static CommandResult runShellCommand(String cmd) {
        ChildProcess proc = startShellCommand(cmd);
        proc.waitFinished();
        return proc.getResult();
    }

    public static ChildProcess startSuCommand(String cmd) {
        String[] cmdarray = new String[3];
        cmdarray[0] = "su";
        cmdarray[1] = "-c";
        cmdarray[2] = cmd;
        return startSysCmd(cmdarray, null);
    }

    public static CommandResult runSuCommand(String cmd) {
        ChildProcess proc = startSuCommand(cmd);
        proc.waitFinished();
        return proc.getResult();
    }

    public static boolean canSU() {
        CommandResult r = runShellCommand("id");
        StringBuilder out = new StringBuilder(0);
        out.append(r.getStdout());
        out.append(" ; ");
        out.append(r.getStderr());
        Log.d(TAG, "canSU() su[" + r.getExitValue() + "]: " + out);
        return r.success();
    }
    
    public class CommandResult2 {
        public final String stdout;
        public final String stderr;
        public final Integer exit_value;

        CommandResult2(final Integer exit_value_in) {
            this(exit_value_in, null, null);
        }

        CommandResult2(final Integer exit_value_in, final String stdout_in,
                      final String stderr_in) {
            exit_value = exit_value_in;
            stdout = stdout_in;
            stderr = stderr_in;
        }

        public boolean success() {
            return exit_value != null && exit_value == 0;
        }
    }

    public class sh {
        private String SHELL = "sh";

        public sh(final String SHELL_in) {
            SHELL = SHELL_in;
        }

        private String getStreamLines(final InputStream is) {
            String out = null;
            StringBuffer buffer = null;
            final DataInputStream dis = new DataInputStream(is);

            try {
                if (dis.available() > 0) {
                    buffer = new StringBuffer(dis.readLine());
                    while (dis.available() > 0) {
                        buffer.append("\n").append(dis.readLine());
                    }
                }
                dis.close();
            } catch (final Exception ex) {
                Log.e(TAG, ex.getMessage());
            }
            if (buffer != null) {
                out = buffer.toString();
            }
            return out;
        }

        public Process run(final String s) {
            Process process;
            try {
                process = Runtime.getRuntime().exec(SHELL);
                final DataOutputStream toProcess = new DataOutputStream(
                        process.getOutputStream());
                toProcess.writeBytes("exec " + s + "\n");
                toProcess.flush();
            } catch (final Exception e) {
                Log.e(TAG,
                        "Exception while trying to run: '" + s + "' "
                                + e.getMessage());
                process = null;
            }
            return process;
        }

        public CommandResult2 runWaitFor(final String s) {
            final Process process = run(s);
            Integer exit_value = null;
            String stdout = null;
            String stderr = null;
            if (process != null) {
                try {
                    exit_value = process.waitFor();

                    stdout = getStreamLines(process.getInputStream());
                    stderr = getStreamLines(process.getErrorStream());

                } catch (final Exception e) {
                    Log.e(TAG, "runWaitFor " + e.toString());
                }
            }
            return new CommandResult2(exit_value, stdout, stderr);
        }
    }
}