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