Invalid argument error while using umount() function

Asked Oct 01 '18 at 21:51

Active Oct 01 '18 at 22:23

Viewed 303 times

I am trying to unmount a usb-storage device through a c++ code as follows.

  while(umount("/dev/sdc1/")!=0)
  {
    std::cout << "ERROR: " << strerror(errno) << std::endl;
    std::this_thread::sleep_for (std::chrono::seconds(2));
  }

But, I get an error saying: Invalid argument. What am I doing wrong?

Thanks in advance!

asked Oct 01 '18 at 21:51

vacky

1

Is that error when you compile or is that what `errno` is saying when you execute? If the latter, what happens when you open a terminal and run `ls /dev/sdc1`? – scohe001 Oct 01 '18 at 21:54
This is the error I get when I execute. – vacky Oct 01 '18 at 21:56
@scohe001 when I run ls /dev/sdc1, output is: "/dev/sdc1" – vacky Oct 01 '18 at 21:58
When you run your executable, are you doing it as root (ie: `sudo ./a.out`)? – scohe001 Oct 01 '18 at 21:58
@scohe001 yes I am running it as a root – vacky Oct 01 '18 at 22:11

Invalid argument error while using umount() function

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