'No such file or directory' when trying to copy a file from sdcard to system with Runtime.exec()?

I want to copy a TTF file from SD card to /system/fonts and change its permissions.

Here is my code:

try {
    Runtime.getRuntime().exec("su");
} catch (IOException e) {
    Log.e("Font", "su", e);
}
exec("cp /mnt/sdcard/some.ttf /system/fonts/DroidSans.ttf");
exec("chmod 644 /system/fonts/DroidSans.ttf");

void exec(String cmd) {
    Log.e("Font", cmd);
    try {
        ProcessBuilder pb = new ProcessBuilder(cmd);
        pb.redirectErrorStream(true);
        Process p = pb.start();
        BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line;
        while ((line = br.readLine()) != null)
            Log.e("Font", cmd + ": " + line);
        Log.e("Font", cmd + ": " + p.waitFor());
    } catch (Exception e) {
        Log.e("Font", cmd, e);
    }
}

Root permissions granted & /system/fonts mounted R/W. However I still get the following exceptions:

E/Font    ( 4120): java.io.IOException: Error running exec(). Command: [cp /mnt/sdcard/some.ttf /system/fonts/DroidSans.ttf] Working Directory: null Environment: [ANDROID_SOCKET_zygote=10, ANDROID_BOOTLOGO=1, EXTERNAL_STORAGE=/mnt/sdcard, ANDROID_CACHE=/cache, ANDROID_ASSETS=/system/app, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ASEC_MOUNTPOINT=/mnt/asec, LOOP_MOUNTPOINT=/mnt/obb, BOOTCLASSPATH=/system/framework/core.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/core-junit.jar, SD_EXT_DIRECTORY=/sd-ext, PHONE_STORAGE=/mnt/emmc, ANDROID_DATA=/data, LD_LIBRARY_PATH=/vendor/lib:/system/lib, ANDROID_ROOT=/system, ANDROID_PROPERTY_WORKSPACE=9,32768]
E/Font    ( 4120):      at java.lang.ProcessManager.exec(ProcessManager.java:224)
E/Font    ( 4120):      at java.lang.ProcessBuilder.start(ProcessBuilder.java:202)
E/Font    ( 4120):      at hh.font.FontManagerActivity.exec(FontManagerActivity.java:94)
E/Font    ( 4120):      at hh.font.FontManagerActivity.onContextItemSelected(FontManagerActivity.java:84)
E/Font    ( 4120):      at android.app.Activity.onMenuItemSelected(Activity.java:2209)
E/Font    ( 4120):      at com.android.internal.policy.impl.PhoneWindow$ContextMenuCallback.onMenuItemSelected(PhoneWindow.java:2831)
E/Font    ( 4120):      at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143)
E/Font    ( 4120):      at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855)
E/Font    ( 4120):      at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:137)
E/Font    ( 4120):      at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:873)
E/Font    ( 4120):      at android.widget.AdapterView.performItemClick(AdapterView.java:284)
E/Font    ( 4120):      at android.widget.ListView.performItemClick(ListView.java:3513)
E/Font    ( 4120):      at android.widget.AbsListView$PerformClick.run(AbsListView.java:1849)
E/Font    ( 4120):      at android.os.Handler.handleCallback(Handler.java:587)
E/Font    ( 4120):      at android.os.Handler.dispatchMessage(Handler.java:92)
E/Font    ( 4120):      at android.os.Looper.loop(Looper.java:130)
E/Font    ( 4120):      at android.app.ActivityThread.main(ActivityThread.java:3835)
E/Font    ( 4120):      at java.lang.reflect.Method.invokeNative(Native Method)
E/Font    ( 4120):      at java.lang.开发者_JAVA技巧reflect.Method.invoke(Method.java:507)
E/Font    ( 4120):      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
E/Font    ( 4120):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
E/Font    ( 4120):      at dalvik.system.NativeStart.main(Native Method)
E/Font    ( 4120): Caused by: java.io.IOException: No such file or directory
E/Font    ( 4120):      at java.lang.ProcessManager.exec(Native Method)
E/Font    ( 4120):      at java.lang.ProcessManager.exec(ProcessManager.java:222)
E/Font    ( 4120):      ... 21 more

I can execute these commands without a problem with adb shell so the paths should be OK.

Had spent many hours without a clue. Could somebody please help me out? Thanks a lot!

you cant access sdcard of device/emulator on command prompt, as adb is having all resource of android environment so it can access

Please see the following example on how to use exec. You should pass an array of strings instead of a single string.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import android.util.Log;

public class ExecShell {

    private static final int BUFFER_SIZE = 65536;
    private static final long DEFAULT_TIMEOUT = 4000L;

    public static List<String> executeCommand(Command command, String args) {
        return executeCommand(command, args, DEFAULT_TIMEOUT);
    }

    public static List<String> executeCommand(Command command, String args, long timeout) {
        ExecutorService executor = Executors.newSingleThreadExecutor();
        Collection<Callable<List<String>>> commands = new ArrayList<Callable<List<String>>>();

        Log.d(Global.TAG,"--> Starting command:" + command.name());

        commands.add(command.run(args));

        try {
            List<Future<List<String>>> result = executor.invokeAll(commands);
            Log.d(Global.TAG,"--> Command completed: " + command.name());
            return result.get(0).get(timeout, TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            Log.d(Global.TAG,"--> Command interrupted: " + command.name());
            return null;
        } catch (ExecutionException e) {
            return null;
        } catch (TimeoutException e) {
            Log.d(Global.TAG,"--> Command timed out: " + command.name());
            return null;   
        }
    }

    public enum Command {
        RESTART_DEVICE("reboot now", 0),
        MOUNT_FLASH_DRIVE("mkdir /mnt/usb; chmod 777 /mnt/usb; mount -o rw -t vfat /dev/block/%s1 /mnt/usb", 1),
        CHMOD_SERIAL("chmod 777 /dev/ttyUSB*", 0),
        SETUP_ETH0_DHCP("netcfg eth0 up; netcfg eth0 dhcp", 0),
        SETUP_ETH0_STATIC("netcfg eth0 up; ifconfig eth0 %s", 1),
        SETUP_ETH0_DEFAULT_GW("route add default gw %s dev eth0", 1),
        OFFLINE_ETH0("netcfg eth0 down", 0),
        START_ADBD("start adbd", 0),
        STOP_ADBD("stop adbd", 0),
        UPDATE_FIRMWARE("cd /mnt/usb; ./update.sh", 0),
        KILL_PROCESS("kill %s", 1),
        SET_DATETIME("date %s", 1),
        GET_APK_MD5("busybox md5sum /data/app/com.atClass.cardShoe-*.apk", 0),
        FIND_FLASH_DRIVE("dmesg | busybox grep SCSI | busybox tail -1", 0),
        GET_PROCESSES("ps | busybox grep 'com.atClass.cardShoe'", 0),
        LINK_DATABASE("",0);
        ;

        private static String SHELL = "/system/bin/self_su1";
        private static String SHELL_OPTIONS = "-c";

        private final String command;
        private final int numArgs;

        private Command(String command, int numArgs) {
            this.command = command;
            this.numArgs = numArgs;
        }

        public Callable<List<String>> run(final String ... args) {
            int argCount = 0;
            for (String arg : args) {
                if (arg != null) {
                    ++argCount;
                }
            }
            if (argCount != numArgs) {
                throw new IllegalArgumentException();
            }
            return new Callable<List<String>>() {
                public List<String> call() throws IOException {
                    Process p = null;
                    List<String> result = null;

                    try {
                        p = execute(args);
                    } catch (IOException e) {
                        Log.d(Global.TAG, String.format("--> Unable to execute command: '%s'", name()));
                        throw e;
                    }
                    if (p != null) {
                        BufferedReader in = null;
                        try {
                            in = new BufferedReader(new InputStreamReader(p.getInputStream()), BUFFER_SIZE);
                            String line = null;
                            result = new ArrayList<String>();
                            while ((line = in.readLine()) != null) {
                                result.add(line);
                                Log.d(Global.TAG, String.format("--> ExecShell (%s) : %s", name(), line));
                            }
                        } catch (IOException e) {
                            Log.d(Global.TAG, String.format("--> Unable to execute command: '%s'", name()));
                            throw e;
                        } finally {
                            if (in != null) {
                                in.close();
                            }
                            if (p != null) {
                                p.destroy();
                            }
                        }
                    }
                    return result;
                }
            };
        }

        public Process execute(String ... args) throws IOException {
            int argCount = 0;
            for (String arg : args) {
                if (arg != null) {
                    ++argCount;
                }
            }
            if (argCount != numArgs) {
                throw new IllegalArgumentException();
            }
            String cmd = String.format(command, (Object[]) args);
            Log.d(Global.TAG, String.format("Command String: %s", cmd));
            Process p = new ProcessBuilder().command(SHELL, SHELL_OPTIONS, cmd).redirectErrorStream(true).start();
            return p;
        }   
    }
}