On Tue, Feb 08, 2005 at 11:37:54PM +0100, Jeroen van Wolffelaar wrote: > If you're going to offer %S to retrieve fundamental blocksize, I think > it'd be best to actually really retrieve that value, and do something > smart otherwise (error out, noting in the documentation that %S might > not always be available?), unless of course it is for a given system > actually known that f_bsize is indeed the unit size for free/total > blocks.
findutils calls this "ST_NBLOCKSIZE" and does it this way: - /* Extract or fake data from a `struct stat'. ST_BLKSIZE: Preferred I/O blocksize for the file, in bytes. ST_NBLOCKS: Number of blocks in the file, including indirect blocks. ST_NBLOCKSIZE: Size of blocks used when calculating ST_NBLOCKS. */ #ifndef HAVE_STRUCT_STAT_ST_BLOCKS /* ... */ # if defined(hpux) || defined(__hpux__) || defined(__hpux) /* HP-UX counts st_blocks in 1024-byte units. This loses when mixing HP-UX and BSD filesystems with NFS. */ # define ST_NBLOCKSIZE 1024 # else /* !hpux */ # if defined(_AIX) && defined(_I386) /* AIX PS/2 counts st_blocks in 4K units. */ # define ST_NBLOCKSIZE (4 * 1024) # endif /* !hpux */ #endif #ifndef ST_NBLOCKSIZE # define ST_NBLOCKSIZE 512 #endif (The actual code is a bit more complex, as it also defines a macro ST_BLKSIZE and defines a more complex value for ST_NBLOCKS on Crays (i.e. UNICOS)). -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
