How to access inode information

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02-06-2009

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inode.c from the linux kernel is not a standalone program. In fact, most individual C files, kernel or not, are not standalone programs. inode.c outside the kernel won't work because kernel code needs to be executed inside the kernel and needs things from other C files to work.

What, precisely, do you think fiddling with inodes will help you do? What do you want howto's on? I'm suspecting there's some confusion on the topic here.

An inode is essentially a unique number given to each file inside a partition. This number is only useful outside the kernel for comparison purposes, i.e. to see if two different filenames are hardlinked.

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clri_hfs

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)

UNIX for Advanced & Expert Users