sysupgrade: Enable killing of all processes under upgraded

If the sysupgrade scripts is called under upgraded, it will not kill all
other processes as it should to avoid interference by locked filesystem.
This patch checks the parent and if it is upgraded, it kills all.

Signed-off-by: André Valentin <avalentin@marcant.net>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41563 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/lib/upgrade/common.sh

@@ -99,6 +99,13 @@ kill_remaining() { # [ <signal> ]
 	local sig="${1:-TERM}"
 	echo -n "Sending $sig to remaining processes ... "
 
+	local my_pid=$$
+	local my_ppid=$(cut -d' ' -f4  /proc/$my_pid/stat)
+	local my_ppisupgraded=
+	grep -q upgraded /proc/$my_ppid/cmdline >/dev/null && {
+		local my_ppisupgraded=1
+	}
+	
 	local stat
 	for stat in /proc/[0-9]*/stat; do
 		[ -f "$stat" ] || continue
@@ -113,18 +120,26 @@ kill_remaining() { # [ <signal> ]
 		# Skip kernel threads
 		[ -n "$cmdline" ] || continue
 
-		case "$name" in
-			# Skip essential services
-			*procd*|*upgraded*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*) : ;;
+		if [ $$ -eq 1 ] || [ $my_ppid -eq 1 ] && [ -n "$my_ppisupgraded" ]; then
+			# Running as init process, kill everything except me
+			if [ $pid -ne $$ ] && [ $pid -ne $my_ppid ]; then
+				echo -n "$name "
+				kill -$sig $pid 2>/dev/null
+			fi
+		else 
+			case "$name" in
+				# Skip essential services
+				*procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*) : ;;
 
-			# Killable process
-			*)
-				if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
-					echo -n "$name "
-					kill -$sig $pid 2>/dev/null
-				fi
-			;;
-		esac
+				# Killable process
+				*)
+					if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
+						echo -n "$name "
+						kill -$sig $pid 2>/dev/null
+					fi
+				;;
+			esac
+		fi
 	done
 	echo ""
 }