e2image: complain if running e2image -r or -Q on a mounted filesystem

Several users have used e2image on a mounted RW filesystem, resulting in
inconsistent, useless e2images for debugging purposes.

This commit will forbid this and print an error message, although the
user can override this using a new force option.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2 files changed