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doc setgroups

From: Kevin Ryde
Subject: doc setgroups
Date: Thu, 04 Mar 2004 08:07:52 +1000
User-agent: Gnus/5.110002 (No Gnus v0.2) Emacs/21.3 (gnu/linux)

Apparently never having made it into the manual,

        * posix.texi (Processes): Add setgroups.

 - Scheme Procedure: setgroups vec
 - C Function: scm_setgroups (vec)
     Set the current supplementary group IDs to the integers in the
     given vector VEC.  The return value is unspecified.

     Generally only the superuser can set the process group IDs (*note
     Setting the Group IDs: (libc)Setting Groups.).

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