Add wssshd init script for system service management

- Create comprehensive init script with start/stop/restart/status actions
- Check for /etc/wssshd.conf existence on start with helpful error message
- Redirect daemon output to syslog for proper logging
- Implement proper process management with PID file handling
- Follow LSB (Linux Standard Base) init script conventions
- Support for daemon user/group configuration
- Graceful shutdown with process termination and cleanup
- Compatible with chkconfig and systemd service management

wssshd.init

+#!/bin/bash
+#
+# wssshd        Startup script for WebSocket SSH Daemon
+#
+# chkconfig: 345 85 15
+# description: WebSocket SSH Daemon - Handles WebSocket connections from wsssh/wsscp clients
+# processname: wssshd
+# pidfile: /var/run/wssshd.pid
+# config: /etc/wssshd.conf
+
+### BEGIN INIT INFO
+# Provides: wssshd
+# Required-Start: $local_fs $network $syslog
+# Required-Stop: $local_fs $network $syslog
+# Default-Start: 3 4 5
+# Default-Stop: 0 1 2 6
+# Short-Description: WebSocket SSH Daemon
+# Description: WebSocket SSH Daemon handles WebSocket connections from wsssh/wsscp clients
+### END INIT INFO
+
+# Source function library
+. /etc/rc.d/init.d/functions
+
+# Configuration
+NAME="wssshd"
+DAEMON="/usr/bin/wssshd.py"
+PIDFILE="/var/run/wssshd.pid"
+CONFIG="/etc/wssshd.conf"
+LOG_FACILITY="daemon"
+USER="wssshd"
+GROUP="wssshd"
+
+# Check if we're running as root
+if [ $(id -u) != 0 ]; then
+    echo "Error: This script must be run as root"
+    exit 1
+fi
+
+# Function to check if process is running
+is_running() {
+    if [ -f "$PIDFILE" ]; then
+        local pid=$(cat "$PIDFILE")
+        if [ -d "/proc/$pid" ]; then
+            return 0
+        else
+            # Stale PID file
+            rm -f "$PIDFILE"
+            return 1
+        fi
+    fi
+    return 1
+}
+
+# Function to start the daemon
+start() {
+    echo -n $"Starting $NAME: "
+
+    # Check if already running
+    if is_running; then
+        echo -n "already running"
+        echo_success
+        echo
+        return 0
+    fi
+
+    # Check if config file exists
+    if [ ! -f "$CONFIG" ]; then
+        echo -n "configuration file $CONFIG not found"
+        echo_failure
+        echo
+        echo "Please create $CONFIG with the required settings."
+        echo "You can use the example configuration as a template:"
+        echo "  cp /usr/share/wsssh/wssshd.conf.example $CONFIG"
+        return 1
+    fi
+
+    # Check if daemon executable exists
+    if [ ! -x "$DAEMON" ]; then
+        echo -n "daemon executable $DAEMON not found or not executable"
+        echo_failure
+        echo
+        return 1
+    fi
+
+    # Create PID directory if it doesn't exist
+    mkdir -p /var/run
+    chown $USER:$GROUP /var/run 2>/dev/null || true
+
+    # Start the daemon with syslog redirection
+    daemon --pidfile="$PIDFILE" --user="$USER" \
+        "exec $DAEMON --config $CONFIG 2>&1 | logger -t $NAME -p $LOG_FACILITY.info"
+
+    local retval=$?
+
+    if [ $retval -eq 0 ]; then
+        # Wait a moment for the daemon to start
+        sleep 2
+
+        # Check if it actually started
+        if is_running; then
+            echo_success
+            echo
+            return 0
+        else
+            echo_failure
+            echo
+            echo "Daemon failed to start properly"
+            return 1
+        fi
+    else
+        echo_failure
+        echo
+        return $retval
+    fi
+}
+
+# Function to stop the daemon
+stop() {
+    echo -n $"Stopping $NAME: "
+
+    if ! is_running; then
+        echo -n "not running"
+        echo_success
+        echo
+        return 0
+    fi
+
+    # Try graceful shutdown first
+    if [ -f "$PIDFILE" ]; then
+        local pid=$(cat "$PIDFILE")
+        kill -TERM $pid 2>/dev/null
+
+        # Wait up to 30 seconds for graceful shutdown
+        local count=0
+        while [ $count -lt 30 ] && is_running; do
+            sleep 1
+            count=$((count + 1))
+        done
+
+        if is_running; then
+            # Force kill if graceful shutdown failed
+            echo -n "forcing shutdown... "
+            kill -KILL $pid 2>/dev/null
+            sleep 2
+        fi
+    fi
+
+    # Clean up PID file
+    rm -f "$PIDFILE"
+
+    if is_running; then
+        echo_failure
+        echo
+        return 1
+    else
+        echo_success
+        echo
+        return 0
+    fi
+}
+
+# Function to restart the daemon
+restart() {
+    stop
+    sleep 2
+    start
+}
+
+# Function to check status
+status() {
+    if is_running; then
+        local pid=$(cat "$PIDFILE")
+        echo "$NAME is running (PID: $pid)"
+        return 0
+    else
+        echo "$NAME is not running"
+        return 3
+    fi
+}
+
+# Function to reload configuration
+reload() {
+    echo -n $"Reloading $NAME configuration: "
+
+    if ! is_running; then
+        echo -n "not running"
+        echo_failure
+        echo
+        return 1
+    fi
+
+    local pid=$(cat "$PIDFILE")
+    kill -HUP $pid 2>/dev/null
+
+    if [ $? -eq 0 ]; then
+        echo_success
+        echo
+        return 0
+    else
+        echo_failure
+        echo
+        return 1
+    fi
+}
+
+# Main script logic
+case "$1" in
+    start)
+        start
+        ;;
+    stop)
+        stop
+        ;;
+    restart)
+        restart
+        ;;
+    reload)
+        reload
+        ;;
+    status)
+        status
+        ;;
+    condrestart|try-restart)
+        if is_running; then
+            restart
+        fi
+        ;;
+    *)
+        echo "Usage: $0 {start|stop|restart|reload|status|condrestart}"
+        exit 2
+        ;;
+esac
+
+exit $?
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