headlessvnc : ré-écriture complète

bin/headlessvnc

@@ -1,107 +1,59 @@
-#!/bin/bash
-
-# cd to the local VNC directory, exit if it fails
-cd "${HOME}/.vnc" || exit 5
-
-# Variable
-verbs="start status stop restart help"
-
-# echo bold text
-echobf() {
-    printf '\033[1m%s\033[0m\n' "$*"
+#!/usr/bin/env sh
+perror() {
+  >&2 printf '\033[1;31mERROR:\033[0m \033[1m%s\033[0m\n' "$*"
 }
 
-# Print an error message
-print_error() {
-    (
-        printf '\033[1;31m%s\033[0m ' "ERROR:"
-        echobf "$*"
-    ) > /dev/stderr
+error_usage() {
+  perror "invalid usage"
+  >&2 usage
+
+  exit 1
 }
 
-# Print an error and exit
-error() {
-    print_error "$1"
-    shift
-    exit "$1"
-}
-
-# Check if the VNC server is running
 is_running() {
-    vncserver -list | grep -q '^:1'
+  vncserver -list | grep -q '^:1'
 }
 
-# Show a help message
-public_help() {
-    local name
-    name="$(basename "$0")"
-    cat << EOF
-${name} - Start a VNC server
+start() {
+  if ! is_running; then
+    set -- vncserver \
+      -localhost -alwaysshared \
+      -securitytypes none
+    [ -x ~/.vnc/xstartup ] && set -- "$@" -xstartup ~/.vnc/xstartup
 
-Usage:
-    ${name} ${verbs// /|}
-EOF
+    "$@"
+  else
+    perror "server already started"
+    exit 2
+  fi
 }
 
-# Show the same help with an error
-error_help() {
-    print_error "Invalid usage"
-    >&2 public_help
-    return 1
+stop() {
+  if is_running; then
+    vncserver -kill :1
+  else
+    perror "server is not running"
+    exit 2
+  fi
 }
 
-# Start the VNC server
-public_start() {
-    if ! is_running; then
-        set -e
-        vncserver \
-            -xstartup ./xstartup \
-            -localhost \
-            -alwaysshared \
-            -securitytypes none \
-            -nocursor \
-            -geometry 1600x900
-    else
-        error "The VNC server is already running!" 4
-    fi
+status() {
+  if is_running; then
+    printf '\033[1;32m*\033[0m \033[1m%s\n' "the server is running"
+  else
+    printf '\033[1;31m*\033[0m \033[1m%s\n' "the server is not running"
+  fi
 }
 
-# Check if the server is running
-public_status() {
-    if is_running; then
-        echobf "The VNC server is running."
-        tail "./$(cat /proc/sys/kernel/hostname):1.log" | sed 's/^/\t/g'
-    else
-        echobf "The VNC server is not running."
-    fi
-}
-
-# Stop the VNC server
-public_stop() {
-    if is_running; then
-        vncserver -kill :1
-    else
-        error "The VNC server is not running!" 3
-    fi
-}
-
-# Restart the VNC server
-public_restart() {
-    public_stop
-    public_start
-}
-
-# Parse argument
-if [ -n "$1" ]; then
-    arg="$1"
-else
-    arg=status
-fi
-
-# Main switch
-if echo "$verbs" | tr ' ' '\n' | grep -q "$arg"; then
-    "public_${arg}"
-else
-    error_help
-fi
-
+case "$1" in
+  ""|status) status ;;
+  start) start ;;
+  stop)  stop  ;;
+  restart)
+    stop
+    start
+    ;;
+  *)
+    error_usage
+    ;;
+esac