Re: [PATCH -mm 5/7] add user namespace

Eric W. Biederman
2006-07-14T18:07:21Z

Dave Hansen <haveblue@us.ibm.com> writes:

> On Fri, 2006-07-14 at 11:18 -0600, Eric W. Biederman wrote:
>> /proc/<pid>/fd/...
>> /proc/<pid>/exe
>> /proc/<pid>/cwd
>>
>> It isn't quite the same as you are actually opening a second
>> copy of the file descriptor but the essence is the same.
>
> Last I checked, those were symlinks and didn't work for things like
> deleted files. Am I wrong?

Yes. They are not really symlinks.

Wanting to have an executable that was deleted after it was done
executing. I wrote it to a file. opened it, unlinked it, set close
on exec, and the exec'd it with /proc/self/fd/N.

Eric