IIRC file compression saves the compressed file data in a file’s resource fork. Your stat call probably only sees the data fork.
Other sources for seemingly incongruent numerics could be: -> Finder displays hard disk bytes in SI-style units (i.e. 1000 bytes == 1 kilobyte) like hard disk manufacturers have been doing it for ages, not 1024 like programmers and RAM manufacturers do it. -> files have overhead (storing metadata, file names, allocation blocks) so depending on which API you use, some or all of these may be included or not -> As implied above, files on HFS+ have a resource fork that can also take up space on disk, and API may or may not include this in its reports. Cheers, -- Uli Kusterer “The Witnesses of TeachText are everywhere...” http://zathras.de On 04 Apr 2015, at 11:23, Gerriet M. Denkmann <gerr...@mdenkmann.de> wrote: > When I look at " /Library/Dictionaries/Apple > Dictionary.dictionary/Contents/Info.plist" in Finder, it shows a preview and > says 5 kB. Ok. > > But: Finder → FIle → Get Info says: > 4,893 bytes (Zero bytes on disk) > > And lstat shows: > st_size = 4893 (file size, in bytes) > st_blocks = 0 (blocks allocated for file) > st_flags = 0x20 (user defined flags for file) > > /usr/include/sys/stat.h has: > #define UF_COMPRESSED 0x00000020 /* file is hfs-compressed */ > > So: where are these bytes (if not on disk)? > And if they are really compressed: how much space they take in some unknown > compressed location? > > I am trying to find who or what is taking space on my disk. So given some > directory, I want to add the disk space of all its files (+ subdirectories). > > OS X 10.10.2 > > Gerriet. > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/witness.of.teachtext%40gmx.net _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
