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How to unmount Linux folder from Java

I tried:

final ProcessBuilder pb = new ProcessBuilder("umount", "foldername");
final Process p = pb.start();

Throws

umount: / home / user / folder_name is not in fstab (and you are not root)

I tried

final ProcessBuilder pb = new ProcessBuilder("sudo","umount", "foldername");
final Process p = pb.start();

Throws

sudo: sorry, you must have a tty to run sudo

I got the root password but cannot provide it ProcessBuilder

. Also I cannot edit fstab

(or anything else that needs to be edited) because it is a remote virus machine running on a remote server from a saved OS image.

I just want to run the command as root.

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1 answer


You have several options:



  • Make the control terminal accessible for the sudo

    user to enter the password there.

    pb = new ProcessBuilder("sh", "-c", "sudo umount foldername </dev/tty");
Process p = pb.start();
p.waitFor();

  • Run the program with gksudo

    , not sudo

    . Systems that use GTK + often come with a package gksu

    as a GUI for su

    and sudo

    .

    pb = new ProcessBuilder("gksudo","umount", "foldername");

  • Open a terminal emulator window for sudo

    :

    pb = new ProcessBuilder("xterm","-e","sudo","umount","foldername");
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