Re: [PATCH] Manpage: Update description of 'user=username' for '-run-with'

[Paolo Bonzini]

> Manpage: the description of '-runs' didn't show this parameter will use
> setuid, so the customer might get confused when 'elevateprivileges=deny' is
> used. Since '-runas' is going to be deprecated and replaced by this
> parameter in the coming qemu9.1, add the message here.

Queued, thanks.  I modified the patch a bit to explain how setgid and
setgroups are used in addition to setuid:

diff --git a/qemu-options.hx b/qemu-options.hx
index ad6521ef5e7..694fa37f284 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -5024,8 +5024,11 @@ SRST
     in combination with -runas.

     ``user=username`` or ``user=uid:gid`` can be used to drop root privileges
-    by switching to the specified user (via username) or user and group
-    (via uid:gid) immediately before starting guest execution.
+    before starting guest execution. QEMU will use the ``setuid`` and 
``setgid``
+    system calls to switch to the specified identity.  Note that the
+    ``user=username`` syntax will also apply the full set of supplementary
+    groups for the user, whereas the ``user=uid:gid`` will use only the
+    ``gid`` group.

Paolo