bug#7355: coreutils df on OSX reports wrong sizes for large filesystems

[Pádraig Brady]

On 08/11/10 20:37, Tim Spriggs wrote:
> Hello,
> 
>   I am running gentoo-prefix on OSX which builds coreutils. When I
> compare the output of the system df to the standard GNU df I get:
> 
> 
> $ /bin/df -h /data/hirise06
> Filesystem               Size   Used  Avail Capacity  Mounted on
> hiserve2:/vol/hirise06  7.9Ti  430Gi  7.5Ti     6%    /data/hirise06
> 
> $ df -h /data/hirise06
> Filesystem            Size  Used Avail Use% Mounted on
> hiserve2:/vol/hirise06
>                       2.0T  431G -523G   -  /data/hirise06
> 
> The 2.0T size looks suspicious to me. Maybe an integer is overflowing 
> somewhere?

Well 2T is between 32 bit and 64 bit.
If I had to guess I'd say df was using a 32 bit statfs
that was returning 1024 blksize?

Could you compare the system calls made by both versions of df.
On GNU/Linux I can trace the statfs calls like:

strace -v -e statfs,statfs64 df /data/hirise06

If the trace for the above gives no output
for either command, then can you include the
full trace output.

thanks,
Pádraig.