(Android™) SFTP Get/Set File Permission

Demonstrates how to set the permissions of a file on the SFTP server

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSFtp sftp = new CkSFtp();

    // Connect to the SSH/SFTP server.  
    String hostname = "sftp.example.com";
    int port = 22;
    boolean success = sftp.Connect(hostname,port);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Authenticate with the SSH server.  Chilkat SFTP supports
    // both password-based authenication as well as public-key
    // authentication.  This example uses password authenication.
    success = sftp.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // After authenticating, the SFTP subsystem must be initialized:
    success = sftp.InitializeSftp();
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Get the file permissions for the "hamlet.xml" file on the server.
    // The hamlet.xml file is located in the qa_data directory found under the HOME directory of the SSH user account.
    // We are passing the remote file path (we are not passing a file handle returned by a previous call to OpenFile).
    boolean isHandle = false;
    boolean followLinks = true;
    int permVal = sftp.GetFilePermissions("qa_data/hamlet.xml",followLinks,isHandle);
    if (permVal < 0) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Note: Filesystem permissions on Linux/Unix/MacOSX are typically written in octal (POSIX file permissions).  For example 0644 is octal.
    // To convert to decimal: octal 644 = 6*8^2 + 4*8 + 4 = 420 (decimal)
    // 
    // The server may return a permissions value (in octal) such as 100644.
    // The "100" indicates the file type, such as regular file or directory. 

    // Show the decimal value of the permissions
    Log.i(TAG, "decimal permissions value: " + String.valueOf(permVal));

    // To set the file permissions, pass the integer value.
    // Let's change the permissions to 0664, which is 6*8^2 + 6*8 + 4 = 436 (decimal)
    success = sftp.SetPermissions("qa_data/hamlet.xml",isHandle,436);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    Log.i(TAG, "Success.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}