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[bug#41875] [PATCH] system: Add 'sg' and 'newgrp' to %SETUID-PROGRAMS.

From: Brice Waegeneire
Subject: [bug#41875] [PATCH] system: Add 'sg' and 'newgrp' to %SETUID-PROGRAMS.
Date: Mon, 15 Jun 2020 18:23:28 +0200

* gnu/system.scm (%setuid-programs): Add 'sg' and 'newgrp'.

Without it 'newgrp' is unusable:

--8<---------------cut here---------------start------------->8---
$ whoami
$ cat /etc/group | grep wireshark
$ groups
users libvirt adbusers plugdev kvm lp netdev audio video input dialout wheel
$ newgrp wireshark
setgroups: Operation not permitted
setgid: Operation not permitted
--8<---------------cut here---------------end--------------->8---

I also added 'sg' since, in the shadow package, it's a symlink to 'newgrp'.

 gnu/system.scm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gnu/system.scm b/gnu/system.scm
index 06bbc9e9c8..3e3d1927c2 100644
--- a/gnu/system.scm
+++ b/gnu/system.scm
@@ -932,7 +932,9 @@ use 'plain-file' instead~%")
   ;; Default set of setuid-root programs.
   (let ((shadow (@ (gnu packages admin) shadow)))
     (list (file-append shadow "/bin/passwd")
+          (file-append shadow "/bin/sg")
           (file-append shadow "/bin/su")
+          (file-append shadow "/bin/newgrp")
           (file-append shadow "/bin/newuidmap")
           (file-append shadow "/bin/newgidmap")
           (file-append inetutils "/bin/ping")

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