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/*************************************************************************
* $Id: mod.c,v 1.8 2000/04/04 23:37:33 dpotter Exp $
*
* mod.c -- The module handling functions
*
* Copyright (C) by Andreas Neuhaus <andy@fasta.fh-dortmund.de>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <signal.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "log.h"
#include "modules.inc"
#include "mod.h"
/*************************************************************************
* GLOBALS
*/
fd_set blank_fd;
/*************************************************************************
* LIST OF ALL MODULES
*/
mod_t *mod_list = NULL;
mod_message_t *mod_msgs = NULL;
/*************************************************************************
* REGISTER A NEW MODULE
*/
void mod_register (mod_t *newmod)
{
newmod->next = mod_list;
mod_list = newmod;
}
/*************************************************************************
* SEND MESSAGE TO ALL MODULES
*/
void mod_sendmsg (int msgtype, char *msg)
{
mod_message_t *newmsg, *m;
// create new message entry
newmsg = malloc(sizeof(mod_message_t));
if (!newmsg)
return;
newmsg->msg = malloc(strlen(msg)+1);
if (!newmsg->msg) {
free(newmsg);
return;
}
newmsg->msgtype = msgtype;
strcpy(newmsg->msg, msg);
newmsg->next = NULL;
// append message to queue
log_printf(LOG_NOISYDEBUG, "mod_sendmsg(): %d '%s'\n", newmsg->msgtype, newmsg->msg);
for (m=mod_msgs; m && m->next; m=m->next);
m ? m->next : mod_msgs = newmsg;
}
void mod_sendmsgf (int msgtype, char *msg, ...)
{
va_list ap;
char buf[1024];
va_start(ap, msg);
vsnprintf(buf, sizeof(buf)-1, msg, ap);
buf[sizeof(buf)-1] = 0;
va_end(ap);
mod_sendmsg(msgtype, buf);
}
/*************************************************************************
* INIT ALL MODULES
*/
void mod_init (void)
{
mod_initfunc_t *mi;
char *s;
// call init function of all modules
for (mi=mod_list_init; *mi; mi++) {
s = (*mi)();
if (s)
log_printf(LOG_ERROR, "Error initializing module: %s\n", s);
}
}
/*************************************************************************
* DEINIT ALL MODULES
*/
void mod_deinit (void)
{
mod_t *m;
// call deinit function of all modules
// and clean up module list
for (m=mod_list; m; m=m->next)
if (m->deinit)
m->deinit();
mod_list = NULL;
}
/*************************************************************************
* RELOAD ALL MODULES
*/
void mod_reload (void)
{
mod_t *m;
char *s;
// call reload function of all modules
for (m=mod_list; m; m=m->next)
if (m->reload) {
s = m->reload();
if (s)
log_printf(LOG_ERROR, "Error reloading module: %s\n", s);
}
}
/*************************************************************************
* DISPERSE MESSAGES AND UPDATE ALL MODULES
*/
void mod_update (void)
{
mod_t *m;
mod_message_t *msg;
mod_message_t msgdup;
// process message queue
while (mod_msgs) {
msg = mod_msgs;
// global messages we handle
if (msg->msgtype == MSGTYPE_INPUT && !strcasecmp(msg->msg, "reload")) {
raise(SIGHUP);
// disperse message to modules, make a copy of the message
// so that modules may alter it without affecting
// other modules (think of strtok)
} else {
for (m=mod_list; m; m=m->next)
if (m->message) {
msgdup.msgtype = msg->msgtype;
msgdup.msg = malloc(strlen(msg->msg)+1);
strcpy(msgdup.msg, msg->msg);
m->message(msgdup.msgtype, msgdup.msg);
free(msgdup.msg);
}
}
// remove old message from queue
mod_msgs = mod_msgs->next;
free(msg);
}
// call update function of all modules
for (m=mod_list; m; m=m->next)
if (m->update)
m->update();
}
/*************************************************************************
* HANDLE SIGCHLD CALLS FOR ALL MODULES
*/
void mod_sigchld(int signal)
{
pid_t pid;
mod_t *m;
int status;
// this process was called because a child of IRMP3 just died and
// we received a SIGCHLD signal. wait() won't block.
pid = wait(&status);
log_printf(LOG_DEBUG, "mod_sigchld(): notified that child %d died.\n", pid);
// call child function of all modules
for (m=mod_list;m;m=m->next)
if (m->chld)
m->chld(pid,status);
}
/*************************************************************************
* EOF
*/
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