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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <sys/resource.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include "procd.h"
char *ubus_socket = NULL;
static struct ubus_context *ctx;
static struct uloop_process ubus_proc;
static bool ubus_connected = false;
static void procd_ubus_connection_lost(struct ubus_context *old_ctx);
static void ubus_proc_cb(struct uloop_process *proc, int ret)
{
/* nothing to do here */
}
static void procd_restart_ubus(void)
{
char *argv[] = { "ubusd", NULL, ubus_socket, NULL };
if (ubus_proc.pending) {
ERROR("Killing existing ubus instance, pid=%d\n", (int) ubus_proc.pid);
kill(ubus_proc.pid, SIGKILL);
uloop_process_delete(&ubus_proc);
}
if (ubus_socket)
argv[1] = "-s";
ubus_proc.pid = fork();
if (!ubus_proc.pid) {
setpriority(PRIO_PROCESS, 0, -20);
execvp(argv[0], argv);
exit(-1);
}
if (ubus_proc.pid <= 0) {
ERROR("Failed to start new ubus instance\n");
return;
}
DEBUG(1, "Launched new ubus instance, pid=%d\n", (int) ubus_proc.pid);
uloop_process_add(&ubus_proc);
}
static void procd_ubus_try_connect(void)
{
if (ctx) {
ubus_connected = !ubus_reconnect(ctx, ubus_socket);
return;
}
ctx = ubus_connect(ubus_socket);
if (!ctx) {
DEBUG(2, "Connection to ubus failed\n");
return;
}
ctx->connection_lost = procd_ubus_connection_lost;
ubus_connected = true;
ubus_init_service(ctx);
if (getpid() == 1) {
ubus_init_log(ctx);
ubus_init_system(ctx);
}
}
static void procd_ubus_connection_lost(struct ubus_context *old_ctx)
{
procd_ubus_try_connect();
while (!ubus_connected) {
procd_restart_ubus();
sleep(1);
procd_ubus_try_connect();
}
DEBUG(1, "Connected to ubus, id=%08x\n", ctx->local_id);
ubus_add_uloop(ctx);
}
void procd_connect_ubus(void)
{
ubus_proc.cb = ubus_proc_cb;
procd_ubus_connection_lost(NULL);
}
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