lkml.org 
[lkml]   [2003]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] bug in setpgid()? process groups and thread groups
From
Date
On Sul, 2003-08-03 at 08:22, Florian Weimer wrote:
> Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
>
> > #1 Lots of non posix afflicted intelligent programmers use the per
> > thread uid stuff in daemons. Its really really useful
>
> It doesn't work reliably because the threading implementation might
> have to send signals which the current combination of credentials does
> not allow.

It works beautifully. Its very effective for clone() using applications


> IMHO, POSIX is wrong to favor process attributes so strongly. It
> wouldn't be a problem if there were other ways to pass these implicit
> parameters (such as thread-specific attributes, or, even better,
> syscall arguments). But often there isn't.

The restriction in this case comes from a more fundamental thing - posix pthreads
is full of compromises so it can be done in user space. Clearly you can't split
uid's in user space very sanely.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:47    [W:0.046 / U:0.220 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site