From ec1a0c8fa2e7a7c6cf70f68bdabc07cbb1a567cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20=C5=81yszczek?= <michal.lyszczek@bofc.pl>
Date: Sun, 5 May 2019 23:43:40 +0200
Subject: [PATCH] init.d/sysctl.in: add support for busybox sysctl
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Busybox version of sysctl does not support --system argument,
and files need to be loaded one by one. This patch adds code
to recognize busybox sysctl and execute proper function based
on that.

Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>
---
 init.d/sysctl.in | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/init.d/sysctl.in b/init.d/sysctl.in
index e49f4db2..a705b3d4 100644
--- a/init.d/sysctl.in
+++ b/init.d/sysctl.in
@@ -37,6 +37,23 @@ BSD_sysctl()
 	return $retval
 }
 
+Busybox_sysctl()
+{
+	local quiet
+	yesno $rc_verbose || quiet=-q
+
+	eindent
+	for conf in /etc/sysctl.conf /etc/sysctl.d/*.conf; do
+		if [ -r "$conf" ]; then
+			vebegin "applying $conf"
+			sysctl $quiet -p "$conf" || retval=1
+			veend $retval
+		fi
+	done
+	eoutdent
+	return $retval
+}
+
 Linux_sysctl()
 {
 	local quiet
@@ -52,7 +69,15 @@ start()
 	ebegin "Configuring kernel parameters"
 	case "$RC_UNAME" in
 	*BSD|GNU) BSD_sysctl; rc=$? ;;
-	Linux) Linux_sysctl; rc=$? ;;
+	Linux)
+		sysctl -h > /dev/null 2>&1
+		if [ $? -ne 0 ]; then
+			# busybox version of sysctl does not recognize -h option
+			Busybox_sysctl
+		else
+			Linux_sysctl
+		fi
+		rc=$? ;;
 	esac
 	eend $rc "Unable to configure some kernel parameters"
 }
-- 
2.18.1