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authorChristian Poessinger <christian@poessinger.com>2020-02-13 17:32:18 +0100
committerGitHub <noreply@github.com>2020-02-13 17:32:18 +0100
commit13bc01034d287ffdf1249138ddfbdbb1866b5a93 (patch)
tree755a97aa42b8e98699927543ffe7766f5b847a0f /src/etc/dhcp/dhclient-enter-hooks.d/02-vyos-stopdhclient
parent233c463b4cf6f8ca4d3e2a1a3a30e5c62ce42061 (diff)
parente39f2ead18c17fa4a8fdfe35437202fb202e983a (diff)
downloadvyos-1x-13bc01034d287ffdf1249138ddfbdbb1866b5a93.tar.gz
vyos-1x-13bc01034d287ffdf1249138ddfbdbb1866b5a93.zip
Merge pull request #218 from zdc/T1987
dhclient-script: T1987: Multiple fixes in dhclient-script
Diffstat (limited to 'src/etc/dhcp/dhclient-enter-hooks.d/02-vyos-stopdhclient')
-rw-r--r--src/etc/dhcp/dhclient-enter-hooks.d/02-vyos-stopdhclient27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/etc/dhcp/dhclient-enter-hooks.d/02-vyos-stopdhclient b/src/etc/dhcp/dhclient-enter-hooks.d/02-vyos-stopdhclient
new file mode 100644
index 000000000..d5d90632c
--- /dev/null
+++ b/src/etc/dhcp/dhclient-enter-hooks.d/02-vyos-stopdhclient
@@ -0,0 +1,27 @@
+# skip all of this if dhclient-script running by stop command defined below
+if [ -z ${CONTROLLED_STOP} ] ; then
+ # stop dhclient for this interface, if it is not current one
+ # get PID for current dhclient
+ current_dhclient=`ps --no-headers --format ppid --pid $$ | awk '{ print $1 }'`
+
+ # get PID for master process (current can be a fork)
+ master_dhclient=`ps --no-headers --format ppid --pid $current_dhclient | awk '{ print $1 }'`
+
+ # get IP version for current dhclient
+ ipversion_arg=`ps --no-headers --format args --pid $current_dhclient | awk '{ print $2 }'`
+
+ # get list of all dhclient running for current interface
+ dhclients_pids=(`ps --no-headers --format pid,args -C dhclient | awk -v IFACE="/sbin/dhclient $ipversion_arg .*$interface$" '$0 ~ IFACE { print $1 }'`)
+
+ logmsg info "Current dhclient PID: $current_dhclient, Parent PID: $master_dhclient, IP version: $ipversion_arg, All dhclients for interface $interface: ${dhclients_pids[@]}"
+ # stop all dhclients for current interface, except current one
+ for dhclient in ${dhclients_pids[@]}; do
+ if ([ $dhclient -ne $current_dhclient ] && [ $dhclient -ne $master_dhclient ]); then
+ logmsg info "Stopping dhclient with PID: ${dhclient}"
+ # get path to PID-file of dhclient process
+ local dhclient_pidfile=`ps --no-headers --format args --pid $dhclient | awk 'match($0, ".*-pf (/.*pid) .*", PF) { print PF[1] }'`
+ # stop dhclient with native command - this will run dhclient-script with correct reason unlike simple kill
+ dhclient -e CONTROLLED_STOP=yes -x -pf $dhclient_pidfile
+ fi
+ done
+fi