Connecting with linux sFTP server using Groovy - file

Question

I am trying to run the following Groovy scripts which intends to alter file permissions to 777 on a linux server -
#GrabConfig(systemClassLoader = true)
#Grab(group="com.jcraft", module="jsch", version="0.1.46")
import com.jcraft.jsch.*;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.ChannelSession;
import java.io.InputStream;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Vector;
java.util.Properties config = new java.util.Properties()
config.put "StrictHostKeyChecking", "no"
JSch ssh = new JSch();
Session session = null;
Session sess = ssh.getSession ("USERNAME", "HOST", 22);
sess.with {
setConfig config
setPassword ("PASSWORD");
connect()
Channel chan = openChannel ("sftp");
chan.connect()
ChannelSftp sftp = (ChannelSftp) chan;
"chmod 777".execute(null, new File("WORKING DIRECTORY\Test_ftpuser_place.txt"))
chan.disconnect()
disconnect()
}
Furthermore, I tried with the following command instead of Chmod, but still it didn't work.
builder = new AntBuilder()
builder.chmod(dir:"WORKING DIRECTORY", perm:'+rwxrwxrwx', includes:'Test_ftpuser.txt')
And im getting this error on running the former part of the script -
java.io.IOException: Cannot run program "chmod": CreateProcess error=2, The system cannot find the file specified
at java_lang_Runtime$exec$0.call(Unknown Source)
at ConsoleScript45$_run_closure1.doCall(ConsoleScript45:45)
at ConsoleScript45.run(ConsoleScript45:18)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
... 3 more
Could someone please help me out with this.
Thank you!

Answer 1

See this line:
"chmod 777".execute(null, new File("WORKING DIRECTORY\Test_ftpuser_place.txt"))
The second parameter in the "execute" method represents the current working directory (see the docs here). You're using it to represent the file you're looking to change, which I don't think is what it was intended for.
Try creating the file first, and then changing its permissions. You can also use methods on the File object to set these, without having to use "process".execute():
def myFile = new File("path/to/file")
myFile.write("Hello World")
myFile.setReadable(true, false)
myFile.setWritable(true, false)
myFile.setExecutable(true, false)