/etc/config/wireless support for madwifi (work in progress)

[openwrt.git] / package / ppp / files / ppp.sh

diff --git a/package/ppp/files/ppp.sh b/package/ppp/files/ppp.sh
index 51a1955..abc0227 100644 (file)
--- a/package/ppp/files/ppp.sh
+++ b/package/ppp/files/ppp.sh
@@ -1,13 +1,21 @@
 scan_ppp() {
        config_get ifname "$1" ifname
        pppdev="${pppdev:-0}"
-       config_set "$1" device "$ifname"
        config_set "$1" ifname "ppp$pppdev"
        config_set "$1" unit "$pppdev"
 }
 
 start_pppd() {
        local cfg="$1"; shift
+
+       # make sure only one pppd process is started
+       lock "/var/lock/ppp-${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-${cfg}"
+               return 0
+       }
+
        config_get device "$cfg" device
        config_get unit "$cfg" unit
        config_get username "$cfg" username
@@ -27,4 +35,6 @@ start_pppd() {
                ${username:+user "$username" password "$password"} \
                linkname "$cfg" \
                ipparam "$cfg"
+
+       lock -u "/var/lock/ppp-${cfg}"
 }