linux - Check if directory mounted with bash

Question

I am using

mount -o bind /some/directory/here /foo/bar

I want to check /foo/bar though with a bash script, and see if its been mounted? If not, then call the above mount command, else do something else. How can I do this?

CentOS is the operating system.

Answer 1

You didn't bother to mention an O/S.

Ubuntu Linux 11.10 (and probably most up-to-date flavors of Linux) have the mountpoint command.

Here's an example on one of my servers:

$ mountpoint /oracle
/oracle is a mountpoint
$ mountpoint /bin
/bin is not a mountpoint

Actually, in your case, you should be able to use the -q option, like this:

mountpoint -q /foo/bar || mount -o bind /some/directory/here /foo/bar

Hope that helps.