Re: Readlink: permission denied

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On 23May2012 18:46, JD <jd1008@xxxxxxxxx> wrote:
| On 05/23/2012 02:59 PM, Cameron Simpson wrote:
| > On 23May2012 12:13, JD<jd1008@xxxxxxxxx>  wrote:
| > | Why would I be denied access to info of files opened by processes
| > | running with my uid?
| > | This is a bug.
| > |
| > | To wit:
| > | COMMAND     PID   TID    USER   FD      TYPE     DEVICE  SIZE/OFF
| > | NODE NAME
| > | gnome-key  1707            jd  cwd   unknown
| > | /proc/1707/cwd (readlink: Permission denied)
| >
| > What do:
| >
| >    ls -ld /proc/1707
| >    ls -la /proc/1707
| >
| > show? Adjust for your running system, of course.
| >
| > Maybe /proc itself has exciting new permissions.
| > Maybe lsof has exciting new setgidness or something.
| > Or SELinux hates you.
| >
| > BTW, _does_ this work as root? Just for info.
| >
| > Cheers,
| Yes it does work for root.
| So, my question still remains that a process
| that opens files/devices/dirs....etc,
| having  user X's uid/gid for credentials, can open these
| resources, yet lsof, invoked by same user X, belches out
| Permission denied.
| How were such resources opened using X's credentials
| in the first place, if user X has no permission to read the link?

Sigh. Which is why I asked you to run some ls commands, to _inspect_ the
permissions. What do they show?
-- 
Cameron Simpson <cs@xxxxxxxxxx> DoD#743
http://www.cskk.ezoshosting.com/cs/

The proofs are so obvious that they can be left to the reader.
        - Lars V. Ahlfors, Complex Analysis
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