Re: Filename to "inode" pointer in C

[Peter Werner <Peter.Werner@wgsn.com>]

i wrote some stuff for accessing ffs partitions/files ages ago, but didnt
really do anything with it.

http://www.ifost.org.au/~peterw/fs.tar.gz

# make
# ./dfs /dev/wd0f
dfs> ls
2 .
2 ..
3 da
4 bar
dfs>

the codes a bit of a mess/crappy, just kill the printfs. it should be a bit
clearer than the fsck/fsdb (which is useful too). you could probably use
parts of it to write the utility you mention below.

-pete

-----Original Message-----
From: John D. [mailto:lists@webcrunchers.com]
Sent: Sunday, November 03, 2002 7:18 PM
To: Sergey Lyubka
Cc: tech@openbsd.org
Subject: Re: Filename to "inode" pointer in C


Thanx a lot for your help you guys...   this is what I came up with,
thanx to your help.   For those also interested,  this following function
does exactly what I want.

// Given the path of a file,   return the inode
ino_t   getInode(char *fname) {
	FILE f;
	struct stat mystat;
	
	stat(fname, &mystat);
	return mystat.st_ino;	
}

Ok,  now that I have the inode number of the file,   the next thing I need
to know,  is now to find all the raw physical sectors used by the data in
this file.

Is there a utility (preferrably in C) that given the inode of a file,
would return an array of the physical sectors belonging to that file?

Or,   better yet,   given a specific sector,   to determine what file
references this sector (or node).    I think I can get the filename from the
inode already.

By the way,   if anything useful comes out of this,   I'll post the code.

John