Re: sysfs root link count broken in 2.6.22-git5

[Andreas Schwab]

Jean Delvare <khali@xxxxxxxxxxxx> writes:

> On Tue, 17 Jul 2007 20:38:28 -0700, Greg KH wrote:
>>                                            Isn't there some glibc
>> function that can detect the mount point of a filesystem or directory?
>> Something in glibc parses /proc/mounts for something, I can't remember
>> what it is right now though, sorry.
>
> Maybe getmntent(3)? Sure I could use this, but how expensive compared
> to a single stat(2).

How about comparing the device numbers of /sys and its parent?  If they
are different then /sys is a mount point.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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