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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Monkey HTTP Server
* ==================
* Copyright 2001-2015 Monkey Software LLC <eduardo@monkey.io>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <monkey/monkey.h>
#include <monkey/mk_core.h>
#include "monkey.h"
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
static struct mk_server *server_context;
void mk_signal_context(struct mk_server *ctx)
{
server_context = ctx;
}
/* when we catch a signal and want to exit we call this function
to do it gracefully */
static void mk_signal_exit()
{
/* ignore future signals to properly handle the cleanup */
signal(SIGTERM, SIG_IGN);
signal(SIGINT, SIG_IGN);
signal(SIGHUP, SIG_IGN);
mk_user_undo_uidgid(server_context);
mk_utils_remove_pid(server_context->path_conf_pidfile);
mk_exit_all(server_context);
mk_info("Exiting... >:(");
_exit(EXIT_SUCCESS);
}
static void mk_signal_handler(int signo, siginfo_t *si, void *context UNUSED_PARAM)
{
switch (signo) {
case SIGTERM:
case SIGINT:
mk_signal_exit();
break;
case SIGHUP:
/*
* TODO:
* we should implement the httpd config reload here (not in SIGUSR2).
* Daemon processes “overload” this signal with a mechanism to instruct them to
* reload their configuration files. Sending SIGHUP to Apache, for example,
* instructs it to reread httpd.conf.
*/
mk_signal_exit();
break;
case SIGBUS:
case SIGSEGV:
#ifdef DEBUG
mk_utils_stacktrace();
#endif
mk_err("%s (%d), code=%d, addr=%p",
strsignal(signo), signo, si->si_code, si->si_addr);
//close(sched->server_fd);
//pthread_exit(NULL);
abort();
default:
/* let the kernel handle it */
kill(getpid(), signo);
}
}
void mk_signal_init(void *context)
{
struct sigaction act;
memset(&act, 0x0, sizeof(act));
/* allow signals to be handled concurrently */
act.sa_flags = SA_SIGINFO | SA_NODEFER;
act.sa_sigaction = &mk_signal_handler;
sigaction(SIGSEGV, &act, NULL);
sigaction(SIGBUS, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
mk_signal_context(context);
}
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