vigil

commit 91ff9e6325e9a550d0ad771ae82a05f083af592a
parent 603034d1b4204e8b627a67753de59eb7a7f267ff
Author: dwrz <dwrz@dwrz.net>
Date:   Fri, 28 Oct 2022 14:57:09 +0000

Add semaphore to notify script

Diffstat:
M
scripts/notify
 | 
20
++++++++++++++++++++

1 file changed, 20 insertions(+), 0 deletions(-)
diff --git a/scripts/notify b/scripts/notify
@@ -10,12 +10,24 @@ readonly DEVICES=()
 readonly LABEL_PERSON=0
 readonly LABEL_CAT=15
 
+# Lockfile to ensure that only one instance of the script is running.
+readonly LOCKFILE="/tmp/motion-notify.lock.d"
+
 # yolov7 working directory.
 readonly PROJECT="/tmp/yolov7"
 
 # Notification recipient.
 readonly RECIPIENT="${NOTIFICATION_RECIPIENT}"
 
+acquire_lock () {
+  while true; do
+    if mkdir "${LOCKFILE}"; then
+      break;
+    fi
+    sleep 1
+  done
+}
+
 check_devices() {
   for device in "${DEVICES[@]}"; do
     if ping -c 1 -w 1 "${device}" &> "/dev/null"; then
@@ -61,12 +73,20 @@ upload() {
 delete_outdated() {
   local filepath="$1"
 
+  acquire_lock
+
   rm -f "$1"
   rm -f "${PROJECT}/motion/${name}.jpg"
   find "${HOME}/photo/" -mmin +5 -delete
   find "${HOME}/timelapse/" -mmin +60 -delete
   find "${PROJECT}/motion/" -iname "*.jpg" -mmin +5 -delete
   find "${PROJECT}/motion/labels/" -mmin +5 -delete
+
+  release_lock
+}
+
+release_lock () {
+  rmdir "${LOCKFILE}"
 }
 
 main() {