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/* * Copyright (C) 2012 Dominik Schrmann <dominik@dominikschuermann.de> * Copyright (c) 2012 Stephen Erickson, Chris Ravenscroft, Adam Shanks (RootTools) *//w ww.ja v a 2 s. co m * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.sufficientlysecure.rootcommands; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.LineNumberReader; import java.util.ArrayList; import java.util.Locale; import org.sufficientlysecure.rootcommands.command.SimpleCommand; import org.sufficientlysecure.rootcommands.util.Log; //no modifier, this means it is package-private. Only our internal classes can use this. class Remounter { private Shell shell; public Remounter(Shell shell) { super(); this.shell = shell; } /** * This will take a path, which can contain the file name as well, and attempt to remount the * underlying partition. * <p/> * For example, passing in the following string: * "/system/bin/some/directory/that/really/would/never/exist" will result in /system ultimately * being remounted. However, keep in mind that the longer the path you supply, the more work * this has to do, and the slower it will run. * * @param file * file path * @param mountType * mount type: pass in RO (Read only) or RW (Read Write) * @return a <code>boolean</code> which indicates whether or not the partition has been * remounted as specified. */ protected boolean remount(String file, String mountType) { // if the path has a trailing slash get rid of it. if (file.endsWith("/") && !file.equals("/")) { file = file.substring(0, file.lastIndexOf("/")); } // Make sure that what we are trying to remount is in the mount list. boolean foundMount = false; while (!foundMount) { try { for (Mount mount : getMounts()) { Log.d(RootCommands.TAG, mount.getMountPoint().toString()); if (file.equals(mount.getMountPoint().toString())) { foundMount = true; break; } } } catch (Exception e) { Log.e(RootCommands.TAG, "Exception", e); return false; } if (!foundMount) { try { file = (new File(file).getParent()).toString(); } catch (Exception e) { Log.e(RootCommands.TAG, "Exception", e); return false; } } } Mount mountPoint = findMountPointRecursive(file); Log.d(RootCommands.TAG, "Remounting " + mountPoint.getMountPoint().getAbsolutePath() + " as " + mountType.toLowerCase(Locale.US)); final boolean isMountMode = mountPoint.getFlags().contains(mountType.toLowerCase(Locale.US)); if (!isMountMode) { // grab an instance of the internal class try { SimpleCommand command = new SimpleCommand("busybox mount -o remount," + mountType.toLowerCase(Locale.US) + " " + mountPoint.getDevice().getAbsolutePath() + " " + mountPoint.getMountPoint().getAbsolutePath(), "toolbox mount -o remount," + mountType.toLowerCase(Locale.US) + " " + mountPoint.getDevice().getAbsolutePath() + " " + mountPoint.getMountPoint().getAbsolutePath(), "mount -o remount," + mountType.toLowerCase(Locale.US) + " " + mountPoint.getDevice().getAbsolutePath() + " " + mountPoint.getMountPoint().getAbsolutePath(), "/system/bin/toolbox mount -o remount," + mountType.toLowerCase(Locale.US) + " " + mountPoint.getDevice().getAbsolutePath() + " " + mountPoint.getMountPoint().getAbsolutePath()); // execute on shell shell.add(command).waitForFinish(); } catch (Exception e) { } mountPoint = findMountPointRecursive(file); } if (mountPoint != null) { Log.d(RootCommands.TAG, mountPoint.getFlags() + " AND " + mountType.toLowerCase(Locale.US)); if (mountPoint.getFlags().contains(mountType.toLowerCase(Locale.US))) { Log.d(RootCommands.TAG, mountPoint.getFlags().toString()); return true; } else { Log.d(RootCommands.TAG, mountPoint.getFlags().toString()); } } else { Log.d(RootCommands.TAG, "mountPoint is null"); } return false; } private Mount findMountPointRecursive(String file) { try { ArrayList<Mount> mounts = getMounts(); for (File path = new File(file); path != null;) { for (Mount mount : mounts) { if (mount.getMountPoint().equals(path)) { return mount; } } } return null; } catch (IOException e) { throw new RuntimeException(e); } catch (Exception e) { Log.e(RootCommands.TAG, "Exception", e); } return null; } /** * This will return an ArrayList of the class Mount. The class mount contains the following * property's: device mountPoint type flags * <p/> * These will provide you with any information you need to work with the mount points. * * @return <code>ArrayList<Mount></code> an ArrayList of the class Mount. * @throws Exception * if we cannot return the mount points. */ protected static ArrayList<Mount> getMounts() throws Exception { final String tempFile = "/data/local/RootToolsMounts"; // copy /proc/mounts to tempfile. Directly reading it does not work on 4.3 Shell shell = Shell.startRootShell(); Toolbox tb = new Toolbox(shell); tb.copyFile("/proc/mounts", tempFile, false, false); tb.setFilePermissions(tempFile, "777"); shell.close(); LineNumberReader lnr = null; lnr = new LineNumberReader(new FileReader(tempFile)); String line; ArrayList<Mount> mounts = new ArrayList<Mount>(); while ((line = lnr.readLine()) != null) { Log.d(RootCommands.TAG, line); String[] fields = line.split(" "); mounts.add(new Mount(new File(fields[0]), // device new File(fields[1]), // mountPoint fields[2], // fstype fields[3] // flags )); } lnr.close(); return mounts; } }