使用d-bus

Question

DBUS_INTERFACE="de.pengutronix.rauc.Installer"
DBUS_MEMBER="PropertiesChanged"

keepWatchdogAlive()
{
  echo "1" > $WATCHDOG_DEVICE
  echo "Keep Watchdog alive"
}

monitor_dbus() {
  stdbuf -oL dbus-monitor --system "interface='$DBUS_INTERFACE',member='$DBUS_MEMBER'" |
  while true; do
    while read -r line; do
      message="$message$line"
      if echo "$message" | grep -q "Progress" && echo "$message" | grep -q "de.pengutronix.rauc.Installer"; then
          keepWatchdogAlive
      fi
      message=""
    done
  done
}

echo "Starting Watchdog ... "
watchdog -t 10 $WATCHDOG_DEVICE

echo "Starting D-Bus monitor. Waiting for $DBUS_MEMBER signals on $DBUS_INTERFACE ... "
monitor_dbus &
DBUS_MONITOR_PID=$!

echo "Starting Update Agent script ... "
if [ -d "$RAUC_BUNDLE_DIR" ]; then
  if [ -n "$(ls -A "$RAUC_BUNDLE_DIR")" ]; then
    for bundle in "$RAUC_BUNDLE_DIR"/*
    do
      rauc install "$bundle"
    done
  else
    echo "No rauc bundles found in $RAUC_BUNDLE_DIR"
  fi
else
  echo "Directory $RAUC_BUNDLE_DIR does not exist."
fi

当我在命令行上打电话给dbus-monitor时，它一直都在说：

sig 1731876918.081532 2 org.freedesktop.DBus :1.1 /org/freedesktop/DBus org.freedesktop.DBus NameAcquired
sig 1731876918.081599 4 org.freedesktop.DBus :1.1 /org/freedesktop/DBus org.freedesktop.DBus NameLost

相关的RAUC文档没有任何示例

https：//rauc.readthedocs.io/en/latest/ususe.html#processing-progress-data

https：//rauc.readthedocs.io/en/latest/reference.html#the-progress-property

我找到了这个错误。我的一个变量实际上应该是： DBUS_INTERFACE="org.freedesktop.DBus.Properties"

Answer 1