Set a Remote File's POSIX Permissions

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Demonstrates the Chilkat SFtp.SetPermissions method, which sets the POSIX permission bits of a remote item. The arguments are the remote path (or handle), whether the first argument is a handle, and the permission bits. Pass the permission bits only, not the file-type bits.

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the SFtp.SetPermissions method, which sets the POSIX permission bits of a remote
  // item.  The 1st argument is the remote path (or handle), the 2nd (isHandle) indicates which,
  // and the 3rd is the permission bits.

  final sftp = CkSFtp();

  // Connect, authenticate, and initialize the SFTP subsystem.
  final port = 22;
  try {
    sftp.connect('sftp.example.com', port);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Normally you would not hard-code the password in source.  You should instead obtain it
  // from an interactive prompt, environment variable, or a secrets vault.
  final password = 'mySshPassword';

  try {
    sftp.authenticatePw('mySshLogin', password);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    sftp.initializeSftp();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The 1st argument is a path, so isHandle is false.
  final isHandle = false;

  // Pass the permission bits, not the file-type bits.  0755 gives the owner read/write/execute and
  // read/execute to group and others -- a common mode for an executable script.
  final permissions = 493;
  try {
    sftp.setPermissions('subdir/script.sh', isHandle, permissions);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Permissions set.');

  sftp.disconnect();
}