Example usage for android.os FileUtils S_IRWXG

Introduction

In this page you can find the example usage for android.os FileUtils S_IRWXG.

Prototype

int S_IRWXG

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Usage

From source file:android.util.AtomicFile.java

/**
 * Start a new write operation on the file.  This returns a FileOutputStream
 * to which you can write the new file data.  The existing file is replaced
 * with the new data.  You <em>must not</em> directly close the given
 * FileOutputStream; instead call either {@link #finishWrite(FileOutputStream)}
 * or {@link #failWrite(FileOutputStream)}.
 *
 * <p>Note that if another thread is currently performing
 * a write, this will simply replace whatever that thread is writing
 * with the new file being written by this thread, and when the other
 * thread finishes the write the new write operation will no longer be
 * safe (or will be lost).  You must do your own threading protection for
 * access to AtomicFile.//w  w w  .  j av  a2s.c o  m
 */
public FileOutputStream startWrite() throws IOException {
    // Rename the current file so it may be used as a backup during the next read
    if (mBaseName.exists()) {
        if (!mBackupName.exists()) {
            if (!mBaseName.renameTo(mBackupName)) {
                Log.w("AtomicFile", "Couldn't rename file " + mBaseName + " to backup file " + mBackupName);
            }
        } else {
            mBaseName.delete();
        }
    }
    FileOutputStream str = null;
    try {
        str = new FileOutputStream(mBaseName);
    } catch (FileNotFoundException e) {
        File parent = mBaseName.getParentFile();
        if (!parent.mkdir()) {
            throw new IOException("Couldn't create directory " + mBaseName);
        }
        FileUtils.setPermissions(parent.getPath(), FileUtils.S_IRWXU | FileUtils.S_IRWXG | FileUtils.S_IXOTH,
                -1, -1);
        try {
            str = new FileOutputStream(mBaseName);
        } catch (FileNotFoundException e2) {
            throw new IOException("Couldn't create " + mBaseName);
        }
    }
    return str;
}

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