How a file is deleted in ufs2?

Mon Apr 10 18:11:03 UTC 2006

Eric Anderson wrote:
> Diego Woitasen wrote:
> 
>> I want to know how a file is deleted in a ufs2 filesystem, specifically
>> what happen with the information in the inode. The information is
>> deleted to or the inode is marked as free but the information (uid, gid,
>> blocks, times, etc) remains there?
>>
>> I read the chapter 8 of 'Design and implementation of FreeBSD" and "a
>> Fast file system for Unix", but i can't see the answer.
>>
>> Reading the code is an interesting choice, but is the last resource :)
> 
> 
> 
> I'm 100% certain here, but looking at the code, I don't think much 
> happens besides freeing the inode and clearing it for re-use.  The 
> on-disk data remains.
> 
> 
> Eric

When the story ends, you have

	char *f

	unlink(f);

in the code. So reading "man 2 unlink" might be a good start point. If 
reading McKusick's book and the syscall man page dont make it clear, you 
will have no better choice other than reading the code yourself :D

-- 
Patrick Tracanelli

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