idle_detect_wrapper.sh.in

#!/bin/sh

# Wrapper script to wait for necessary session environment variables
# before executing the actual idle_detect binary.

# Configuration
MAX_WAIT_SECONDS=30 # Total time to wait (e.g., 30 seconds)
WAIT_INTERVAL=2   # Time between checks (e.g., 2 seconds)
CONFIG_FILE_ARG="$1" # Capture potential config file argument

# Function to log messages (optional, adjust as needed)
log_message() {
    echo "idle_detect_wrapper: $1" >&2 # Log to stderr
}

# Wait loop
SECONDS_WAITED=0
ENV_READY=0
while [ $SECONDS_WAITED -lt $MAX_WAIT_SECONDS ]; do
    log_message "Checking environment (waited ${SECONDS_WAITED}s)..."

    # Check for D-Bus Address using systemctl show-environment
    DBUS_ADDR=$(systemctl --user show-environment | grep '^DBUS_SESSION_BUS_ADDRESS=')

    # Check for either DISPLAY or WAYLAND_DISPLAY using systemctl show-environment
    DISP_VAR=$(systemctl --user show-environment | grep -q -E '^(DISPLAY=|WAYLAND_DISPLAY=)' && echo "found")

    # Check if both conditions are met
    if [ -n "$DBUS_ADDR" ] && [ -n "$DISP_VAR" ]; then
        log_message "Found DBUS_SESSION_BUS_ADDRESS and DISPLAY/WAYLAND_DISPLAY."
        # Correctly log the variables found by systemctl for accuracy
        log_message " -> $(systemctl --user show-environment | grep '^DBUS_SESSION_BUS_ADDRESS=')"
        log_message " -> $(systemctl --user show-environment | grep '^DISPLAY=')"
        log_message " -> $(systemctl --user show-environment | grep '^WAYLAND_DISPLAY=')"
        ENV_READY=1
        break
    fi

    # Log specific missing variables for debugging
    if [ -z "$DBUS_ADDR" ]; then log_message " DBUS_SESSION_BUS_ADDRESS missing"; fi
    if [ -z "$DISP_VAR" ]; then log_message " DISPLAY/WAYLAND_DISPLAY missing"; fi

    sleep $WAIT_INTERVAL
    SECONDS_WAITED=$((SECONDS_WAITED + WAIT_INTERVAL))
done

# Check if loop timed out
if [ "$ENV_READY" -eq 0 ]; then
    log_message "ERROR: Timed out after ${SECONDS_WAITED}s waiting for session environment variables. Exiting."
    exit 1
fi

# Environment seems ready, execute the main program
log_message "Environment ready. Executing @CMAKE_INSTALL_FULL_BINDIR@/idle_detect..."

# Pass the config file argument ONLY if it was provided to the wrapper.
if [ -n "$CONFIG_FILE_ARG" ]; then
    log_message " (with specified config file: $CONFIG_FILE_ARG)"
    # Use exec to replace this script process with the idle_detect process
    exec @CMAKE_INSTALL_FULL_BINDIR@/idle_detect "$CONFIG_FILE_ARG"
else
    log_message " (with no config file specified, using default path logic)"
    # Execute idle_detect with NO arguments
    exec @CMAKE_INSTALL_FULL_BINDIR@/idle_detect
fi

# This part of the script is only reached if 'exec' itself fails.
log_message "ERROR: Failed to exec @CMAKE_INSTALL_FULL_BINDIR@/idle_detect. Exiting."
exit 1