I'm calling pscp from Java using the following code:
public static ArrayList<String> runWindowsCommand(String... args) throws WindowsCmdFault {
try {
ProcessBuilder pb = new ProcessBuilder(args);
Process p = pb.start();
//...
//... code to fetch the output and return it back
}catch (IOException | InterruptedException e) {
e.printStackTrace();
}
}
I call this function as follows:
runWindowsCommand("C:\Program Files (x86)\PuTTY\pscp" -pw "password" -r folder/file_to_be_transferred.txt "username@hostname:/remote/unix/server/location/folder_name")
This executes fine and shows the following output:
Arraylist returned (output) =
[, file_to_be_transferred.txt | 3 kB | 2.7 kB/s | ETA: 00:00:00 | 100%]
It appears that the transfer was successful. Except that when I login to the remote unix server via putty and check that file, it shows that nothing was updated.
The file's permission has been set to 666.
When I execute this same command (that we're sending to the function) directly on the cmd prompt, then it gives the same output and the file is actually transferred.
When I run this same command via the Java code given above the file isn't actually transferred.
Why is PSCP not transferring the file?
Update:On further investigation and a big thanks to @Martin Prikryl, I was able to narrow down this issue to the root cause.
Root cause:
The problem is that when the user connection is established from the PSCP, then it connects by default to
(root)/home/username .
The directory that we need to traverse to lies in
(root)/www/....lengthy/folder/here .
Remaining problem:
I'm trying to traverse upwards through the folders after connecting. I'm trying to add a double-period in order traverse upwards towards the root before supplying my path. But it doesn't work.
I'm trying this with pscp as the remote hostname:
../../www/..lengthy/folder/here
but this fails for some odd reason when executed through Java but works through cmd prompt.
How can I add a remote path that includes the second parent before including my actual path?
It seems like there's some limitation when you use Java + PSCP. I solved this problem by uploading the file to a default directory. After that I make a connection via putty's command-line and transfer the file to the required destination. I'm placing my answer over here.