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SubjectRe: [PATCH] bug in setpgid()? process groups and thread groups
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On Sat, 2003-08-02 at 12:08, Roland McGrath wrote:
> The problem exists with uids/gids as well, in the sense that they are
> changed per-thread but POSIX semantics are that setuid et al affect the
> whole process (i.e. all threads in a thread group).

Is there any particular reason why the POSIX semantics are desirable
(besides "that's the way POSIX says it should be")?

Personally, I can think of no benenfit to per-process uids/gids, and
several scenarios where per-thread uids/gids would be good. (Think of a
multi-threaded server handling connections from N different users on N
threads, or a 1 thread per CPU server handling many different user
connections, or a multi-threaded web server running perl/php/etc. stuff
as different users in different threads.)

Just wondering, Nicholas.

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