site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4pre) Gecko/20091014 Fedora/3.0-2.8.b4.fc11 Thunderbird/3.0b4 Hello All, Peter Thanks When I use # mkfile -nv 4g sparse on a 7GB Apple_UFS partition df -k gives me this : #df -k Filesystem 1024-blocks Used Available Capacity Mounted on /dev/disk2s3 7390568 40 7021000 1% /Volumes/UFSVolume This indicates that the file created is sparse since it shows Capacity as 1% On Tue, Nov 3, 2009 at 4:27 PM, Alastair Houghton <alastair@alastairs-place.net> wrote: On 2 Nov 2009, at 13:37, rohan a wrote: I am trying to identify if a particular file is a sparse file using getattrlist() I am using this : attrList.fileattr = ATTR_FILE_TOTALSIZE | ATTR_FILE_ALLOCSIZE; According to the man page if ATTR_FILE_ALLOCSIZE< ATTR_FILE_TOTALSIZE the file is a sparse file. I created the sparse file using dd #dd if=/dev/zero of=sparse-file bs=1 count=0 seek=3g However, both AllocSize and TotalSize are returning the same size while actually AllocSize< TotalSize Does Apple UFS even support sparse files? Remember, UFS is a name used by a fair number of totally different and usually incompatible filesystems. I haven't really ever bothered investigating exactly what Apple's UFS can and can't do... indeed, I've always had the impression that it was only really present for the benefit of old-time NeXT users who might have compatible filesystems floating around already. -- Peter O'Gorman http://pogma.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... On 11/03/2009 09:35 AM, rohan a wrote: Please help me. Need it urgently. I think you should just be using stat(2) and comparing st_size with st_blocks*512. But UFS seems to have gone away, so I was unable to create a UFS disk image to check. On Tue, Nov 3, 2009 at 4:34 PM, rohan a<info1686@gmail.com> wrote: I am using UFS This email sent to site_archiver@lists.apple.com