+
+ # make sure only one pppd process is started
+ lock "/var/lock/ppp-${cfg}"
+ local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
+ [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
+ lock -u "/var/lock/ppp-${cfg}"
+ return 0
+ }
+