Re: Identifying sparse files using getattrlist()
Re: Identifying sparse files using getattrlist()
- Subject: Re: Identifying sparse files using getattrlist()
- From: Alastair Houghton <email@hidden>
- Date: Tue, 3 Nov 2009 16:10:58 +0000
On 3 Nov 2009, at 15:57, rohan a wrote:
Why the hard coded value 512 ?
To find the real size of the file I tried this :
RealSize = st_blocks * st_blksize;
st_blksize returned was 4096
And the real size far execeeded the stat size (should be the opposite
for sparse files)
st_blksize isn't what you think. Check the stat(2) man page, where
you'll see it says:
The size-related fields of the structures are as follows:
st_blksize The optimal I/O block size for the file.
st_blocks The actual number of blocks allocated for the
file in
512-byte units. As short symbolic links are
stored in the
inode, this number may be zero.
Kind regards,
Alastair.
--
http://alastairs-place.net
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