diff --git a/xrsbs b/xrsbs
new file mode 100755
index 0000000..69a7f96
--- /dev/null
+++ b/xrsbs
@@ -0,0 +1,106 @@
+#!/bin/bash
+
+USAGE="
+USAGE: xrsb-sched <action> [<when>] [<repeat>]
+
+        action  A comma or space separated list of actions to associate with the
+                update signal.
+
+        when    The integer number of milliseconds to wait before sending the
+                update signal, or one of the following values:
+                  - m to send the update signal at the top of the next minute
+                  - h to send the update signal at the top of the next hour
+                  - d to send the update signal at the top of the next day
+                If not present, the update signal will be sent immediately.
+
+        repeat  If present, the update signal will be sent repeatedly according
+                to <when>.
+
+EXAMPLES:
+
+        If the daemon interprets the actions 'vol' and 'bl' to mean update the
+        volume and backlight statuses, respectively, send a signal to
+        immediately update both of those statuses.
+
+                xsrb-sched 'vol,bl'
+
+        If the daemon interprets the actions 'cpu' and 'mem' to mean update the
+        cpu and memory usage statuses, respectively, send a signal to update
+        both of those statuses every 5 seconds.
+
+                xsrb-sched 'cpu,mem' 5000 1
+
+        If the daemon interprets the actions 'bat' and 'dt' to mean update the
+        battery and date/time statuses, respectively, send a signal to update
+        both of those statuses at the top of every minute.
+
+                xsrb-sched 'bat,dt' m true
+"
+DAEMON=xrsbd
+ACTION_DIR=/tmp/xrsb-action/
+
+# Convert integer milliseconds to floating point seconds
+ms_to_s () {
+  printf '%.3f' "${1}e-3"
+}
+
+# Validate the arguments
+if [[ "$#" -lt 1 || "$#" -gt 3 ]]; then
+  printf '%s' "${USAGE}" 1>&2
+  exit 128
+fi
+
+IFS=', ' read -r -a actions <<< "$1"
+when="${2:-0}"
+repeat="$3"
+
+if [[ ! "${when}" =~ ^[0-9]+|[mhd]$ ]]; then
+  printf 'Invalid argument <when>: %s\n' "${when}" 1>&2
+  exit 128
+fi
+
+# Get the daemon PID so we can send the signal to it later. Getting the PID once
+# here is more efficient than getting it each time in the while loop, but if the
+# daemon is restarted and the PID changes, all subsequent updates will fail.
+daemon_pid="$(pgrep --newest --exact "${DAEMON}")"
+if [[ -z "${daemon_pid}" ]]; then
+  printf 'The daemon %s is not running\n' "${DAEMON}" 1>&2
+  exit 1
+fi
+
+# Send the signal if this is the first run or if repeat is on
+first_run=1
+while [[ "${first_run}" -eq 1 || -n "${repeat}" ]]; do
+  first_run=0
+
+  # Sleep until it's time to send the signal
+  if [[ "${when}" != '0' ]]; then
+    if [[ "${when}" =~ ^[0-9]+$ ]]; then
+      sleep "$(ms_to_s "${when}")"
+    else
+      case "${when}" in
+        m)
+          sleep $((60 - $(date +%S)))
+          ;;
+        h)
+          readarray -t ms < <(date +'%M%n%S')
+          sleep $((3600 - ms[0] * 60 - ms[1]))
+          ;;
+        d)
+          readarray -t hms < <(date +'%H%n%M%n%S')
+          ##sleep $(((24 - hms[0]) * 3600 - hms[1] * 60 - hms[2]))
+          printf '%d\n' $(((24 - hms[0]) * 3600 - hms[1] * 60 - hms[2]))
+          ;;
+      esac
+    fi
+  fi
+
+  # Create the signal data and send the signal to the daemon
+  if [[ "$(ps --no-headers -o '%c' -q "${daemon_pid}")" != "${DAEMON}" ]]; then
+    printf 'The daemon %s is not running\n' "${DAEMON}" 1>&2
+    exit 1
+  fi
+  for action in "${actions[@]}"; do touch "${ACTION_DIR}/${action}"; done
+  kill -SIGUSR1 "${daemon_pid}"
+done
+