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DateThu, 20 Jan 2000 16:45:01 -0800
From"H. Peter Anvin" <>
SubjectEINVAL when reading files in /proc/sys
It is my belief that files in /proc/sys that cannot be read should not
be +r.  For example:

zeus 61 % uname -a
Linux zeus 2.2.13 #1 SMP Mon Oct 25 17:00:44 PDT 1999 i686 unknown
zeus 62 % ls -l /proc/sys/net/ipv4/route/flush 
-rw-r--r--   1 root     root            0 Jan 20 16:42
/proc/sys/net/ipv4/route/flush
zeus 63 % cat /proc/sys/net/ipv4/route/flush
cat: /proc/sys/net/ipv4/route/flush: Invalid argument
zeus 64 % 

In effect this file is mis-advertising itself as readable.

This is really the only thing that severely breaks walking /proc/sys
with a simple shell script.

	-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."

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