On 06/29/2011 08:35 PM, Patrick O'Callaghan wrote:
From this we see:
$ ls -l /proc/1/smaps 0 -r--r--r--. 1 root root 0 Jun 28 13:25 /proc/1/smaps
$ cat /proc/1/smaps cat: /proc/1/smaps: Permission denied
So that is the source of the problem - tho it probably should not give up.
But the mode bits allow reading, and on my system "cat /proc/1/smaps" succeeds (though it's empty). I don't think those files have extended attributes so that wouldn't be it.
Curiouser and curiouser, as Alice said.
poc
I'm using 3.0 kernel from rawhide - which had a new procps as a requirement - so its possible things have changed in /proc ... also this is systemd's area - its possible some capabilities are needed now which were not in the past ? Clearly the regular unix permissions bits are fine ...