How to get all the hard links that link to the same file quickly?

[Tom H]

On Sat, Apr 23, 2011 at 11:30 AM, Kevin O'Gorman <kogorman at gmail.com> wrote:
> On Sat, Apr 23, 2011 at 7:44 AM, Tom H <tomh0665 at gmail.com> wrote:
>>
>> On Sat, Apr 23, 2011 at 8:40 AM, Peng Yu <pengyu.ut at gmail.com> wrote:
>> >
>> > I'm looking for a fast way to get all the hard links that point to the
>> > same file.
>> >
>> > file="/blah/blah"
>> > find $(stat -c %m "$file") -inum $(stat -c %i "$file")
>> >
>> > Currently, I have a slow way. It traverses the mount point that the
>> > file is on and look for all the files that have the same inum. But
>> > traversing the whole file system is a slow operation. Does the linux
>> > OS keep a table somewhere all the paths pointing to any file or the
>> > linux OS only keep the number of the paths that point to a given inum
>> > but does not keep the actual paths?
>>
>> I've never seen "stat -c %m ..." before. I've just tried it and it
>> doesn't work and isn't in the man pages of either Ubuntu or Fedora.
>> I'd use df to get the mountpoint of a file.
>>
>> I've only ever used "find ... -inum ..." to find hard links but, for
>> an extX filesystem, you can use dumpe2fs to get all the inode tables.
>> That output probably holds the information that you're looking for,
>> but I have no idea whether/how you can query it and get human-readable
>> results from it.
>>
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>
> You can get a pretty good start from
>    find . -exec ls -di {} \; | sort -n
> And (write a script to) look for adjacent entries with the same inode
> number.

By adjacent, do you mean on the same filesystem? (Because, this only
searches below the directory where you are currently.)

You may as well search the mount point in the first step.