From: Brian May <bam@debian.org>
Date: Wed, 25 May 2016 18:06:17 +1000
Subject: Set shell in su invocation

See Bug#824786: celeryd: Initscript doesn't start daemon,
http://bugs.debian.org/824786
---
 extra/generic-init.d/celerybeat | 2 +-
 extra/generic-init.d/celeryd    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/extra/generic-init.d/celerybeat b/extra/generic-init.d/celerybeat
index b34eb25..955c748 100755
--- a/extra/generic-init.d/celerybeat
+++ b/extra/generic-init.d/celerybeat
@@ -260,7 +260,7 @@ stop_beat () {
 
 _chuid () {
     ${CELERYBEAT_SU} ${CELERYBEAT_SU_ARGS} \
-        "$CELERYBEAT_USER" -c "$CELERYBEAT $*"
+        "$CELERYBEAT_USER" --shell=/bin/sh -c "$CELERYBEAT $*"
 }
 
 start_beat () {
diff --git a/extra/generic-init.d/celeryd b/extra/generic-init.d/celeryd
index 2ef11fd..8163a18 100755
--- a/extra/generic-init.d/celeryd
+++ b/extra/generic-init.d/celeryd
@@ -257,7 +257,7 @@ _get_pids() {
 
 
 _chuid () {
-    ${CELERYD_SU} ${CELERYD_SU_ARGS} "$CELERYD_USER" -c "$CELERYD_MULTI $*"
+    ${CELERYD_SU} ${CELERYD_SU_ARGS} "$CELERYD_USER" --shell=/bin/sh -c "$CELERYD_MULTI $*"
 }