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/** \file server/clients.c
* This file contains code allowing LCDd to handle client connections and
* data structures. It contains functions to initialize the internal list
* of clients, terminate client connections, add new clients to the list,
* and locating a client's socket.
*/
/* This file is part of LCDd, the lcdproc server.
*
* This file is released under the GNU General Public License.
* Refer to the COPYING file distributed with this package.
*
* Copyright (c) 1999, William Ferrell, Selene Scriven
* 2002, Joris Robijn
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "shared/report.h"
#include "shared/LL.h"
#include "client.h"
#include "clients.h"
#include "render.h"
LinkedList *clientlist = NULL;
/* Initialize and kill client list...*/
int
clients_init(void)
{
debug(RPT_DEBUG, "%s()", __FUNCTION__);
clientlist = LL_new();
if (!clientlist) {
report(RPT_ERR, "%s: Unable to create client list", __FUNCTION__);
return -1;
}
return 0;
}
int
clients_shutdown(void)
{
Client *c;
debug(RPT_DEBUG, "%s()", __FUNCTION__);
if (!clientlist) {
/* Program shutdown before completed startup */
return -1;
}
/* Free all client structures... */
for (c = LL_GetFirst(clientlist); c; c = LL_GetNext(clientlist)) {
debug(RPT_DEBUG, "%s: ...", __FUNCTION__);
if (c) {
debug(RPT_DEBUG, "%s: ... %i ...", __FUNCTION__, c->sock);
if (client_destroy(c) != 0) {
report(RPT_ERR, "%s: Error freeing client", __FUNCTION__);
} else {
debug(RPT_DEBUG, "%s: Freed client...", __FUNCTION__);
}
} else {
debug(RPT_DEBUG, "%s: No client!", __FUNCTION__);
}
}
/* Then, free the list...*/
LL_Destroy(clientlist);
debug(RPT_DEBUG, "%s: done", __FUNCTION__);
return 0;
}
/* Add the client to the clients list... */
Client *
clients_add_client(Client *c)
{
if (LL_Push(clientlist, c) == 0)
return c;
return NULL;
}
/* Remove the client from the clients list... */
Client *
clients_remove_client(Client *c, Direction whereto)
{
Client *client = LL_Remove(clientlist, c, whereto);
return client;
}
Client *
clients_getfirst(void)
{
return (Client *) LL_GetFirst(clientlist);
}
Client *
clients_getnext(void)
{
return (Client *) LL_GetNext(clientlist);
}
int
clients_client_count(void)
{
return LL_Length(clientlist);
}
/* A client is identified by the file descriptor
* associated with it. Find one.
*/
Client *
clients_find_client_by_sock(int sock)
{
Client *c;
debug(RPT_DEBUG, "%s(sock=%i)", __FUNCTION__, sock);
for (c = LL_GetFirst(clientlist); c; c = LL_GetNext(clientlist)) {
if (c->sock == sock) {
return c;
}
}
debug(RPT_ERR, "%s: failed", __FUNCTION__);
return NULL;
}
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