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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2006-10-26 01:33:36 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2006-10-26 01:33:36 +0000
commit0d67238dc68a0d410c484064e2eccb1808df94ac (patch)
treeb26a16748dffb5ff899a9e14eb1de3f00b938cf1 /package/base-files/default/lib
parent81ddc1b91ccffce0d0be47c55f9b50115f5a6869 (diff)
use lock to remove race conditions in bringing up ppp and dhcp that would lead to multiple active processes
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5298 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/base-files/default/lib')
-rwxr-xr-xpackage/base-files/default/lib/network/config.sh7
1 files changed, 6 insertions, 1 deletions
diff --git a/package/base-files/default/lib/network/config.sh b/package/base-files/default/lib/network/config.sh
index 25c7278e9..9c91a7cab 100755
--- a/package/base-files/default/lib/network/config.sh
+++ b/package/base-files/default/lib/network/config.sh
@@ -121,8 +121,12 @@ setup_interface() {
;;
dhcp)
# prevent udhcpc from starting more than once
+ lock "/var/lock/dhcp-$iface"
pid="$(cat "$pidfile" 2>/dev/null)"
- [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && return 0
+ [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
+ lock -u "/var/lock/dhcp-$iface"
+ return 0
+ }
config_get ipaddr "$config" ipaddr
config_get netmask "$config" netmask
@@ -135,6 +139,7 @@ setup_interface() {
# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
[ "$proto1" != "$proto" ] && dhcpopts="-n -q"
$DEBUG udhcpc -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
+ lock -u "/var/lock/dhcp-$iface"
;;
*)
if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then