From b2d6dd99684a3260d4b719c28819d4c61da0f8ba Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Mon, 16 Sep 2013 15:31:26 +0000
Subject: added help command


diff --git a/switchctl.c b/switchctl.c
index 7917a89..8928a12 100644
--- a/switchctl.c
+++ b/switchctl.c
@@ -81,6 +81,22 @@ int send_response(int fd, const char* response)
   return ret;
 }
 
+void send_usage(int fd)
+{
+  if(fd < 0)
+    return 0;
+
+  send_response(fd, "Usage: ");
+  send_response(fd, "  help      prints this");
+  send_response(fd, "  switch    send raw commands to the switch");
+  send_response(fd, "  channel   tba...");
+  send_response(fd, "  type      tba...");
+  send_response(fd, "  mode      tba...");
+  send_response(fd, "  status    tba...");
+  send_response(fd, "  log       tba...");
+  send_response(fd, "  listen    tba...");
+}
+
 int process_cmd_request(const char* cmd, cmd_id_t cmd_id, const char* param, int fd, cmd_t **cmd_q, client_t* client_lst, options_t* opt)
 {
   client_t* c = client_find(client_lst, fd);
@@ -512,12 +528,15 @@ int process_cmd(const char* cmd, int fd, cmd_t **cmd_q, client_t* client_lst, op
     cmd_id = STATUS;
   else if(!strncmp(cmd, "log", 3))
     cmd_id = LOG;
-  else if(!strncmp(cmd, "listen", 6)) {
+  else if(!strncmp(cmd, "listen", 6))
     cmd_id = LISTEN;
-  }
   else {
-    log_printf(WARNING, "unknown command '%s'", cmd);
-    send_response(fd, "EEE: unknown command");
+    if(!strncmp(cmd, "help", 4)) {
+      send_usage(fd);
+    } else {
+      log_printf(WARNING, "unknown command '%s'", cmd);
+      send_response(fd, "EEE: unknown command");
+    }
     return 0;
   }
   char* param = strchr(cmd, ' ');
@@ -608,12 +627,12 @@ int nonblock_recvline(read_buffer_t* buffer, int fd, cmd_t** cmd_q, client_t* cl
 }
 
 #define SEND_TO_LISTENER(STRING, LEN, FLAG)                                            \
-        if(!strncmp((char *)(buffer->buf), STRING, LEN)) {                                       \
+        if(!strncmp((char *)(buffer->buf), STRING, LEN)) {                             \
           client_t* client;                                                            \
           int listener_cnt = 0;                                                        \
           for(client = client_lst; client; client = client->next)                      \
             if(client->FLAG && client->fd != cmd_fd) {                                 \
-              send_response(client->fd, (char *)(buffer->buf));                                  \
+              send_response(client->fd, (char *)(buffer->buf));                        \
               listener_cnt++;                                                          \
             }                                                                          \
           log_printf(DEBUG, "sent message to %d additional listeners", listener_cnt);  \
-- 
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