mount info for current directory

I think you want something like this:

findmnt -T .

When using the option

-T, --target path

if the path is not a mountpoint file or directory, findmnt checks path elements in reverse order to get the mountpoint. You can print only certain fields via -o, --output [list].
See findmnt --help for the list of available fields.

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Alternatively, you could run:

(until findmnt . ; do cd .. ; done)

The problem you're running into is that all paths are relative to something or other, so you just have to walk the tree. Every time.

findmnt is a member of the util-linux package and has been for a few years now. By now, regardless of your distro, it should already be installed on your Linux machine if you also have the mount tool.

man mount | grep findmnt -B1 -m1
For  more robust and customizable output use
findmnt(8),  especially  in  your   scripts.

findmnt will print out all mounts' info without a mount-point argument, and only that for its argument with one. The -D is the emulate df option. Without -D its output is similar to mount's - but far more configurable. Try findmnt --help and see for yourself.

I stick it in a subshell so the current shell's current directory doesn't change.

So:

mkdir -p /tmp/1/2/3/4/5/6 && cd $_ 
(until findmnt . ; do cd .. ; done && findmnt -D .) && pwd

OUTPUT

TARGET SOURCE FSTYPE OPTIONS
/tmp   tmpfs  tmpfs  rw
SOURCE FSTYPE  SIZE   USED AVAIL USE% TARGET
tmpfs  tmpfs  11.8G 839.7M   11G   7% /tmp
/tmp/1/2/3/4/5/6

If you do not have the -D option available to you (Not in older versions of util-linux) then you need never fear - it is little more than a convenience switch in any case. Notice the column headings it produces for each call - you can include or exclude those for each invocation with the -output switch. I can get the same output as -D might provide like:

 findmnt /tmp -o SOURCE,FSTYPE,SIZE,USED,AVAIL,USE%,TARGET

OUTPUT

SOURCE FSTYPE  SIZE  USED AVAIL USE% TARGET
tmpfs  tmpfs  11.8G  1.1G 10.6G  10% /tmp

I don't know of a command, but you could create a function. You can add the below to your .bashrc:

mountinfo () {
  mount | grep $(df -P "$1" | tail -n 1 | awk '{print $1}')
}

This executes the mount command and passes the output to grep. grep will look for the output of df -P "$1" | tail -n 1 | awk '{print $1}', and to break it down:

• df -P "$1" will run df on the argument passed to the function,
• tail -n 1 will only output the second line, the one that contains the partition info.
• awk '{print $1}' will print the first part of that line, which is the disk/partition number, for example /dev/sda5. That's what grep will look for in the mount command, and output it.

Source your .bashrc file to apply the changes, or log out and log back in.

Now, if you run mountinfo ., you'll get the output you want.