Autzoo.1178
net.v7bugs
utzoo!henry
Wed Dec 2 22:14:57 1981
du vs big dirs
Du(1), as distributed, fails on large directories ( >= 32KB ). Such
directories are unlikely (and unwieldy) but not impossible, particularly
if you have a mail/news system that creates lots of little files in the
same place. The fix is to declare du.c/descend()'s variables "dirsize" and
"offset" to be long instead of int.
Also, du has an inherent problem: it has no way to tell whether a file
has "holes" in it, i.e. whether all the bytes indicated by st_size really
are allocated. This can result in overreporting of disk consumption,
although this is not a major problem since holes in files are uncommon.
Just as well: there is no easy fix for this one.
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