Add mountpoint(1)

[sobomax]

Summary

Add mountpoint(1) a simple utility to figure out if the directory pointed to by the argument is a mount point.

[kib]

This cannot work for deep enough hierarchies. Also I am not sure that it works after chroot or jailing, or rather it should not.

I propose the following D59910. It should allow you to get the info directly from source, with single stat(2).

usr.bin/mountpoint/mountpoint.c

46

nullfs supports file and socket mounts over files

[kib]

In D59906#1374853, @kib wrote:

This cannot work for deep enough hierarchies. Also I am not sure that it works after chroot or jailing, or rather it should not.

I propose the following D59910. It should allow you to get the info directly from source, with single stat(2).

And then might be mountpoint(1) should become a hardlink to stat(1).