behavior of "df" under root and regular user
Justin Walker
justin at Apple.COM
Wed Aug 8 02:05:53 AEST 1990
In article <3022 at dftsrv.gsfc.nasa.gov> jim at jagmac2.gsfc.nasa.gov (Jim Jagielski) writes:
> ...
>When run by root, df prints out the WRONG amount of free blocks... when run
>by a regular-dude, then the free block count os correct. When root runs, df
>adds back in the 10% that is used by the BSD file-system. This gives erroneous
>information, since (as far as I know) this space is NOT available for file
>storage...
I believe that for BSD file systems, the kernel reserves 10% of the
total block count for "root usage", so that regular-dudes cannot snarf
up all the file system for their own nefarious uses (e.g., cat * > foo)
and fowl up the system. The space is available for file storage,
but only for root's use. This is not the case for SVFS types, where
you regular-dudes can gobble to your hearts' content.
> Jim Jagielski NASA/GSFC, Code 711.1
> jim at jagmac2.gsfc.nasa.gov Greenbelt, MD 20771
Regards,
Justin
Justin C. Walker, Curmudgeon-At-Large (justin at apple.com) *
A/UX Group *------------------|
Apple Computer, Inc. | When meetings are outlawed,
10440 Bubb Rd, | Only outlaws will have meetings
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--
Justin C. Walker, Curmudgeon-At-Large (justin at apple.com) *
A/UX Group *------------------|
Apple Computer, Inc. | When meetings are outlawed,
10440 Bubb Rd, | Only outlaws will have meetings
Cupertino, CA 95014 *
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