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[package] base-files: kill possibly existing udhcpc instance when bringing up a dhcp iface, utilize service_kill() in dhcp shutdown.

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Based on patch by Stijn Tintel. Possibly related to #7314



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23092 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
jow 2010-09-19 15:13:06 +00:00
parent 835a68409c
commit 0f55e30c2e
1 changed files with 22 additions and 35 deletions
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57
package/base-files/files/lib/network/config.sh
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@ -340,40 +340,32 @@ setup_interface() {
setup_interface_static "$iface" "$config"
;;
dhcp)
local lockfile="/var/lock/dhcp-$iface"
lock "$lockfile"
# prevent udhcpc from starting more than once
# kill running udhcpc instance
local pidfile="/var/run/dhcp-${iface}.pid"
local pid="$(cat "$pidfile" 2>/dev/null)"
if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then
lock -u "$lockfile"
else
local ipaddr netmask hostname proto1 clientid broadcast
config_get ipaddr "$config" ipaddr
config_get netmask "$config" netmask
config_get hostname "$config" hostname
config_get proto1 "$config" proto
config_get clientid "$config" clientid
config_get_bool broadcast "$config" broadcast 0
service_kill udhcpc "$pidfile"
[ -z "$ipaddr" ] || \
$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
local ipaddr netmask hostname proto1 clientid broadcast
config_get ipaddr "$config" ipaddr
config_get netmask "$config" netmask
config_get hostname "$config" hostname
config_get proto1 "$config" proto
config_get clientid "$config" clientid
config_get_bool broadcast "$config" broadcast 0
# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
local dhcpopts
[ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
[ "$broadcast" = 1 ] && broadcast="-O broadcast" || broadcast=
[ -z "$ipaddr" ] || \
$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
$DEBUG eval udhcpc -t 0 -i "$iface" \
${ipaddr:+-r $ipaddr} \
${hostname:+-H $hostname} \
${clientid:+-c $clientid} \
-b -p "$pidfile" $broadcast \
${dhcpopts:- -O rootpath -R &}
# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
local dhcpopts
[ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
[ "$broadcast" = 1 ] && broadcast="-O broadcast" || broadcast=
lock -u "$lockfile"
fi
$DEBUG eval udhcpc -t 0 -i "$iface" \
${ipaddr:+-r $ipaddr} \
${hostname:+-H $hostname} \
${clientid:+-c $clientid} \
-b -p "$pidfile" $broadcast \
${dhcpopts:- -O rootpath -R &}
;;
none)
setup_interface_none "$iface" "$config"
@ -401,12 +393,7 @@ stop_interface_dhcp() {
remove_dns "$config"
local pidfile="/var/run/dhcp-${ifname}.pid"
local pid="$(cat "$pidfile" 2>/dev/null)"
[ -d "/proc/$pid" ] && {
grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \
while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done
rm -f "$pidfile"
}
service_kill udhcpc "$pidfile"
uci -P /var/state revert "network.$config"
}