11-27-2009
Finding filename given inode in AIX
Use "ncheck" to find a filename given an inode.
You will need to supply the inode and the filesystem that it came from.
If the file has been deleted - meaning ALL instances of it - then this command will not work as it uses filesystem directory entires to make the connection between a filename and the inode.
When you rm a file, you are actually un-linking it. This means that you are removing the directory entry and releasing the inode. So if you still have the file open, and it has been deleted (rm'ed) then it does not have a name (anymore).
Of course it is possible to have multiple (hard) links to a file - and therefore it would be possible to find a filename although it would not be the same as the deleted name. (name = full path to file).
The ncheck command (as well as other AIX info) can be found here:
AIX QuickStart
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clri(1M) clri(1M)
NAME
clri - clear inode
SYNOPSIS
special i-number ...
DESCRIPTION
The command clears the inode i-number by filling it with zeros. special must be a special file name referring to a device containing a
file system. For proper results, special should not be mounted (see WARNINGS below). After is executed, all blocks in the affected file
show up as "missing" in an of special (see fsck(1M)). This command should only be used in emergencies.
Read and write permission is required on the specified special device. The inode becomes allocatable.
WARNINGS
The primary purpose of this command is to remove a file that for some reason does not appear in any directory. If it is used to clear an
inode that does appear in a directory, care should be taken to locate the entry and remove it. Otherwise, when the inode is reallocated to
some new file, the old entry in the directory will still point to that file. At that point, removing the old entry destroys the new file,
causing the new entry to point to an unallocated inode, so the whole cycle is likely to be repeated again.
If the file system is mounted, is likely to be ineffective.
DEPENDENCIES
operates only on file systems of type
SEE ALSO
fsck(1M), fsdb(1M), ncheck(1M).
STANDARDS CONFORMANCE
clri: SVID2, SVID3
clri(1M)