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linuxbashmountchrootprocfs

How to check if /tmp and /proc filesysystems are mounted in a chrooted environment?

I have already tried mounting the filesystems without checking like this:

sudo -- mount -t proc /proc $chroot_dir/proc
sudo -- mount --bind /tmp $chroot_dir/tmp

However, this would corrupt the parent OS session if already mounted, and I would have to restart the OS. I want to check if they're mounted beforehand.

Solution

  • You can see in /etc/mtab what's currently mounted:

    if grep $chroot_dir/proc /etc/mtab; then
  echo already mounted
fi;

    And analogously for tmp.