Doxygen: document list_for_each_entry with examples and

add 'channels' to the page as well.

include/list.h

@@ -430,11 +430,62 @@ SINLINE void list_splice_tail_init(struct list_head *list,
 	     pos != (head); \
 	     pos = n, n = pos->prev)
 
-/**
+/** Walk through client lists (with examples).
- * list_for_each_entry	-	iterate over list of given type
+ * @param	pos	The variable to use as a loop cursor
- * @pos:	the type * to use as a loop cursor.
+ * @param	head	The head of your list
- * @head:	the head for your list.
+ * @param	member	The name of the list_struct within the struct.
- * @member:	the name of the list_struct within the struct.
+ * @ingroup ListFunctions
+ * @section Examples
+ * @subsection client_list List all clients
+ * @code
+ * CMD_FUNC(cmd_listallclients)
+ * {
+ *     Client *acptr;
+ *     sendnotice(client, "List of all clients:");
+ *     list_for_each_entry(acptr, &client_list, client_node)
+ *         sendnotice(client, "Client %s", acptr->name);
+ * }
+ * @endcode
+ * @subsection lclient_list List all LOCAL clients
+ * @code
+ * CMD_FUNC(cmd_listalllocalclients)
+ * {
+ *     Client *acptr;
+ *     sendnotice(client, "List of all local clients:");
+ *     list_for_each_entry(acptr, &lclient_list, lclient_node)
+ *         sendnotice(client, "Client %s", acptr->name);
+ * }
+ * @endcode
+ * @subsection global_server_list List all servers
+ * @code
+ * CMD_FUNC(cmd_listallservers)
+ * {
+ *     Client *acptr;
+ *     sendnotice(client, "List of all servers:");
+ *     list_for_each_entry(acptr, &global_server_list, client_node)
+ *         sendnotice(client, "Server %s", acptr->name);
+ * }
+ * @endcode
+ * @subsection server_list List all LOCALLY connected servers
+ * @code
+ * CMD_FUNC(cmd_listallservers)
+ * {
+ *     Client *acptr;
+ *     sendnotice(client, "List of all LOCAL servers:");
+ *     list_for_each_entry(acptr, &server_list, special_node)
+ *         sendnotice(client, "Server %s", acptr->name);
+ * }
+ * @endcode
+ * @subsection oper_list List all LOCALLY connected IRCOps
+ * @code
+ * CMD_FUNC(cmd_listlocalircops)
+ * {
+ *     Client *acptr;
+ *     sendnotice(client, "List of all LOCAL IRCOps:");
+ *     list_for_each_entry(acptr, &oper_list, special_node)
+ *         sendnotice(client, "User %s", acptr->name);
+ * }
+ * @endcode
  */
 #define list_for_each_entry(pos, head, member)				\
 	for (pos = list_entry((head)->next, typeof(*pos), member);	\
@@ -514,12 +565,16 @@ SINLINE void list_splice_tail_init(struct list_head *list,
 	for (; &pos->member != (head);	\
 	     pos = list_entry(pos->member.next, typeof(*pos), member))
 
-/**
+/** Walk through client lists - special 'safe' version.
- * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * This is a special version, in case clients are removed from the list
- * @pos:	the type * to use as a loop cursor.
+ * while the list is iterated. It is unlikely that you need to use this
- * @n:		another type * to use as temporary storage
+ * from modules, so use list_for_each_entry() instead.
- * @head:	the head for your list.
+ * Examples are also in list_for_each_entry().
- * @member:	the name of the list_struct within the struct.
+ * @param	pos	The variable to use as a loop cursor
+ * @param	n	Variable to be used for temporary storage
+ * @param	head	The head of your list
+ * @param	member	The name of the list_struct within the struct.
+ * @ingroup ListFunctions
  */
 #define list_for_each_entry_safe(pos, n, head, member)			\
 	for (pos = list_entry((head)->next, typeof(*pos), member),	\

include/struct.h

@@ -792,7 +792,8 @@ struct SWhois {
 	char *setby;
 };
 
-/** The command API - used by modules and the core.
+/** The command API - used by modules and the core to add commands, overrides, etc.
+ * See also https://www.unrealircd.org/docs/Dev:Command_API for a higher level overview and example.
  * @defgroup CommandAPI Command API
  * @{
  */

src/api-messagetag.c

@@ -25,7 +25,9 @@
  */
 #include "unrealircd.h"
 
-/** This is the message tags API (message-tags)
+/** This is the message tags API (message-tags).
+ * For an overview of message tags in general (not the API)
+ * see https://www.unrealircd.org/docs/Message_tags
  * @defgroup MessagetagAPI Message tag API
  * @{
  */

src/channel.c

@@ -28,7 +28,16 @@
 long opermode = 0;
 /** Lazy way to signal an SAJOIN MODE */
 long sajoinmode = 0;
-/** List of all channels on the server */
+/** List of all channels on the server.
+ * @ingroup ListFunctions
+ * @section ex1 Example
+ * This code will list all channels on the network.
+ * @code
+ * sendnotice(client, "List of all channels:");
+ * for (channel = channels; channel; channel=channel->nextch)
+ *     sendnotice(client, "Channel %s", channel->name);
+ * @endcode
+ */
 Channel *channels = NULL;
 
 /* some buffers for rebuilding channel/nick lists with comma's */

src/hash.c

@@ -500,7 +500,7 @@ Client *hash_find_server(const char *server, Client *def)
 	return def;
 }
 
-/** These are the functions to search for a client, user (person), server and channel.
+/** Find a client, user (person), server or channel by name.
  * If you are looking for "other find functions", then the alphabetical index of functions
  * at 'f' is your best bet: https://www.unrealircd.org/api/5/globals_func_f.html#index_f
  * @defgroup FindFunctions Find functions

src/send.c

@@ -164,7 +164,7 @@ void mark_data_to_send(Client *to)
 	}
 }
 
-/** All functions used to send data to clients, channels, etc.
+/** Send data to clients, servers, channels, IRCOps, etc.
  * @defgroup SendFunctions Send functions
  * @{
  */