du applet prints wrong size

[d4rken]

Nexus5 with Android 6.0.

shell@hammerhead:/sdcard $ busybox du -sh DCIM
3.6G    DCIM
shell@hammerhead:/sdcard $ busybox du -sk DCIM
3822620 DCIM
shell@hammerhead:/sdcard $ toolbox du -sk DCIM
3822620 DCIM
shell@hammerhead:/sdcard $ toybox du -sk DCIM
18446744073709179932    DCIM
shell@hammerhead:/sdcard $ toybox du -sh DCIM
-.3 GB  DCIM

[d4rken]

Doesn't happen with smaller items.

shell@hammerhead:/sdcard $ busybox du -sk Download
51360   Download
shell@hammerhead:/sdcard $ toolbox du -sk Download
51360   Download
shell@hammerhead:/sdcard $ toybox du -sk Download
51360   Download
shell@hammerhead:/sdcard $ toybox du -sh Download
52 MB   Download

[d4rken]

The magic size is around ~2GB.
It doesn't matter if it's multiple files or a single one.
Could reproduce it by just dd'ing a 2GB file.

1963160 2GBTestFile                                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
1993896 2GBTestFile                                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
2013236 2GBTestFile                                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
2033440 2GBTestFile                                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
2058720 2GBTestFile                                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
2087516 2GBTestFile                                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
18446744073707467048    2GBTestFile                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
18446744073707513764    2GBTestFile                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
18446744073707558644    2GBTestFile                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
18446744073707603732    2GBTestFile                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
18446744073707654844    2GBTestFile                
shell@hammerhead:/sdcard $ toybox du -s 2GBTestFile
18446744073707700480    2GBTestFile                

[d4rken]

The toybox from https://landley.net/toybox/bin/
Prints different human-readable output, but also has this issue.

root@hammerhead:/cache # ./toybox-armv6l du -s /sdcard/2GBTestFile
18446744073707954404    /sdcard/2GBTestFile
root@hammerhead:/cache # ./toybox-armv6l du -hs /sdcard/2GBTestFile
16E     /sdcard/2GBTestFile
shell@hammerhead:/sdcard $ toybox du -hs 2GBTestFile
-1 GB   2GBTestFile

[d4rken]

Not Android specific.

buildvm@buildvm-VirtualBox:~$ dd if=/dev/zero of=2GBTestFile bs=1024 count=2GB
^C2529386+0 records in
2529386+0 records out
2590091264 bytes (2,6 GB) copied, 26,8641 s, 96,4 MB/s
buildvm@buildvm-VirtualBox:~$ ./toybox_darken/toybox_x86 du -s 2GBTestFile 
18446744073707886704    2GBTestFile
buildvm@buildvm-VirtualBox:~$ ./toybox_darken/toybox_x86 du -hs 2GBTestFile 
16E 2GBTestFile
buildvm@buildvm-VirtualBox:~$ uname -a
Linux buildvm-VirtualBox 3.13.0-93-generic #140-Ubuntu SMP Mon Jul 18 21:21:05 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

[enh]

close? fixed by 8d0f0b6