Java executes shell command, chmod 777 XXX, change the solution of invalid permissions.

Execute the shell command in a Java program, change the permissions of the file, and execute it at the command line

chmod 777 <span style= "font-family:arial, Helvetica, Sans-serif;" >/data/misc/123.sh "</span>

To change permissions, but when executing this command in Java code, use the

Runtime.getruntime (). EXEC ("chmod 777/data/misc/123.sh");

Invalid, using

String[] command = new String[] {"/system/bin/sh","-c","chmod 777 /data/misc/123.sh"};
Runtime.getRuntime().exec(command);

Also invalid

Finally, by instantiating a DataOutputStream object, the command is implemented in the writing section of the object, and the code is as follows:

String[] commands = new String[] { "/system/bin/sh", "-c",
			"chmod -R 777 /data/misc/123.sh" };
	Process process = null;
	DataOutputStream dataOutputStream = null;
try {

			process = Runtime.getRuntime().exec("su");
			dataOutputStream = new DataOutputStream(process.getOutputStream());
			int length = commands.length;
			for (int i = 0; i < length; i++) {
				dataOutputStream.writeBytes(commands[i] + "\n");
			}
			dataOutputStream.writeBytes("exit\n");
			dataOutputStream.flush();
			process.waitFor();
		} catch (Exception e) {

		} finally {
			try {
				if (dataOutputStream != null) {
					dataOutputStream.close();
				}
				process.destroy();
			} catch (Exception e) {
			}
		}

Java executes shell command, chmod 777 XXX, change the solution of invalid permissions.