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-rw-r--r--gnu/build/linux-container.scm6
1 files changed, 5 insertions, 1 deletions
diff --git a/gnu/build/linux-container.scm b/gnu/build/linux-container.scm
index a0c8174721..73db127974 100644
--- a/gnu/build/linux-container.scm
+++ b/gnu/build/linux-container.scm
@@ -1,6 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson <davet@gnu.org>
-;;; Copyright © 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2017-2019, 2022 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -442,6 +442,10 @@ return the exit status."
"Like 'container-excursion', but return the return value of THUNK."
(match (pipe)
((in . out)
+ ;; Make sure IN and OUT are not inherited if THUNK forks + execs.
+ (fcntl in F_SETFD FD_CLOEXEC)
+ (fcntl out F_SETFD FD_CLOEXEC)
+
(match (container-excursion pid
(lambda ()
(close-port in)