X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;ds=sidebyside;f=dynamic-ip-update;h=f377293e900b2987609587f3be1710330c1e30e2;hb=da085f71e5ae00a9f78ed903be6ae675f66eacfa;hp=4b5983fbed4153e5c9b7a57d3203863b2093393f;hpb=12cab163424e3a7b0815646d1d4407f9b5839bcb;p=distro-setup

diff --git a/dynamic-ip-update b/dynamic-ip-update
index 4b5983f..f377293 100755
--- a/dynamic-ip-update
+++ b/dynamic-ip-update
@@ -1,8 +1,6 @@
 #!/bin/bash
 source ~/.bashrc
 
-
-
 main() {
 
   fqdn=$(hostname -f)
@@ -13,13 +11,16 @@ main() {
 
   up4=false
 
-  if ! read -r _ _  gateway _ ifdev _ < <(ip -4 route get 85.119.83.50 2>/dev/null); then
-    # if our internet is down, just give up, no need to have an error
-    if [[ ! $INVOCATION_ID ]]; then
+  if ! tmp=$(ip -4 route get 85.119.83.50 2>/dev/null); then
+    # our internet is down
+    if [[ $INVOCATION_ID ]]; then
+      return 0
+    else
       echo $0: failed to get route, giving up
+      exit 0
     fi
-    exit 0
   fi
+  read -r _ _  gateway _ ifdev _ <<<"$tmp"
 
   case $gateway in
     10.2.0.1)
@@ -46,7 +47,12 @@ main() {
 
 
   if $athome; then
-    cur4="$(dig +short $dynhost @iankelling.org | tail -1)"
+    if ! cur4="$(dig +short $dynhost @iankelling.org | tail -1)"; then
+      if [[ ! $INVOCATION_ID ]]; then
+        echo "$0: dig failed. internet looks down. giving up"
+      fi
+      return 0
+    fi
     if ip4=$(curl -s4 https://iankelling.org/cgi/pubip); then
       if [[ $cur4 && $ip4 && $cur4 != $ip4 ]]; then
         up4=true # update ipv4
@@ -126,20 +132,20 @@ EOF
 
 }
 
-if [[ $INVOCATION_ID ]]; then
-  # this is to prevent systemd from filling up the journal
-  for (( runcount=0; runcount < 100; runcount++ )); do
+loop-main() {
+  while true; do
     main
     sleep 30
   done
+}
+
+
+if [[ $INVOCATION_ID ]]; then
+  loop-main
 else
   main
 fi
 
-
-
-
-
 exit 0