|
|
|
/**
|
|
|
|
* xrdp: A Remote Desktop Protocol server.
|
|
|
|
*
|
|
|
|
* Copyright (C) Jay Sorg 2004-2013
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
*
|
|
|
|
* @file sig.c
|
|
|
|
* @brief signal handling functions
|
|
|
|
* @author Jay Sorg, Simone Fedele
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "sesman.h"
|
|
|
|
|
|
|
|
#include "signal.h"
|
|
|
|
|
|
|
|
extern int g_sck;
|
|
|
|
extern int g_pid;
|
|
|
|
extern struct config_sesman *g_cfg; /* in sesman.c */
|
|
|
|
extern tbus g_term_event;
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
|
|
void DEFAULT_CC
|
|
|
|
sig_sesman_shutdown(int sig)
|
|
|
|
{
|
|
|
|
char pid_file[256];
|
|
|
|
|
|
|
|
log_message(LOG_LEVEL_INFO, "shutting down sesman %d", 1);
|
|
|
|
|
|
|
|
if (g_getpid() != g_pid)
|
|
|
|
{
|
|
|
|
LOG_DBG("g_getpid() [%d] differs from g_pid [%d]", (g_getpid()), g_pid);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
LOG_DBG(" - getting signal %d pid %d", sig, g_getpid());
|
|
|
|
|
|
|
|
g_set_wait_obj(g_term_event);
|
|
|
|
|
|
|
|
g_tcp_close(g_sck);
|
|
|
|
|
|
|
|
session_sigkill_all();
|
|
|
|
|
|
|
|
g_snprintf(pid_file, 255, "%s/xrdp-sesman.pid", XRDP_PID_PATH);
|
|
|
|
g_file_delete(pid_file);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
|
|
void DEFAULT_CC
|
|
|
|
sig_sesman_reload_cfg(int sig)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
struct config_sesman *cfg;
|
|
|
|
char cfg_file[256];
|
|
|
|
|
|
|
|
log_message(LOG_LEVEL_WARNING, "receiving SIGHUP %d", 1);
|
|
|
|
|
|
|
|
if (g_getpid() != g_pid)
|
|
|
|
{
|
|
|
|
LOG_DBG("g_getpid() [%d] differs from g_pid [%d]", g_getpid(), g_pid);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
cfg = g_malloc(sizeof(struct config_sesman), 1);
|
|
|
|
|
|
|
|
if (0 == cfg)
|
|
|
|
{
|
|
|
|
log_message(LOG_LEVEL_ERROR, "error creating new config: - keeping old cfg");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (config_read(cfg) != 0)
|
|
|
|
{
|
|
|
|
log_message(LOG_LEVEL_ERROR, "error reading config - keeping old cfg");
|
|
|
|
g_free(cfg);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* stop logging subsystem */
|
|
|
|
log_end();
|
|
|
|
|
|
|
|
/* replace old config with newly read one */
|
|
|
|
g_cfg = cfg;
|
|
|
|
|
|
|
|
g_snprintf(cfg_file, 255, "%s/sesman.ini", XRDP_CFG_PATH);
|
|
|
|
|
|
|
|
/* start again logging subsystem */
|
|
|
|
error = log_start(cfg_file, "xrdp-sesman");
|
|
|
|
|
|
|
|
if (error != LOG_STARTUP_OK)
|
|
|
|
{
|
|
|
|
char buf[256];
|
|
|
|
|
|
|
|
switch (error)
|
|
|
|
{
|
|
|
|
case LOG_ERROR_MALLOC:
|
|
|
|
g_printf("error on malloc. cannot restart logging. log stops here, sorry.\n");
|
|
|
|
break;
|
|
|
|
case LOG_ERROR_FILE_OPEN:
|
|
|
|
g_printf("error reopening log file [%s]. log stops here, sorry.\n", getLogFile(buf, 255));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
log_message(LOG_LEVEL_INFO, "configuration reloaded, log subsystem restarted");
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
|
|
void DEFAULT_CC
|
|
|
|
sig_sesman_session_end(int sig)
|
|
|
|
{
|
|
|
|
int pid;
|
|
|
|
|
|
|
|
if (g_getpid() != g_pid)
|
|
|
|
{
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
pid = g_waitchild();
|
|
|
|
|
|
|
|
if (pid > 0)
|
|
|
|
{
|
|
|
|
session_kill(pid);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
|
|
void *DEFAULT_CC
|
|
|
|
sig_handler_thread(void *arg)
|
|
|
|
{
|
|
|
|
int recv_signal;
|
|
|
|
sigset_t sigmask;
|
|
|
|
sigset_t oldmask;
|
|
|
|
sigset_t waitmask;
|
|
|
|
|
|
|
|
/* mask signals to be able to wait for them... */
|
|
|
|
sigfillset(&sigmask);
|
|
|
|
/* it is a good idea not to block SIGILL SIGSEGV */
|
|
|
|
/* SIGFPE -- see sigaction(2) NOTES */
|
|
|
|
pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask);
|
|
|
|
|
|
|
|
/* building the signal wait mask... */
|
|
|
|
sigemptyset(&waitmask);
|
|
|
|
sigaddset(&waitmask, SIGHUP);
|
|
|
|
sigaddset(&waitmask, SIGCHLD);
|
|
|
|
sigaddset(&waitmask, SIGTERM);
|
|
|
|
sigaddset(&waitmask, SIGINT);
|
|
|
|
|
|
|
|
// sigaddset(&waitmask, SIGFPE);
|
|
|
|
// sigaddset(&waitmask, SIGILL);
|
|
|
|
// sigaddset(&waitmask, SIGSEGV);
|
|
|
|
|
|
|
|
do
|
|
|
|
{
|
|
|
|
LOG_DBG(&(g_cfg->log), "calling sigwait()", 0);
|
|
|
|
sigwait(&waitmask, &recv_signal);
|
|
|
|
|
|
|
|
switch (recv_signal)
|
|
|
|
{
|
|
|
|
case SIGHUP:
|
|
|
|
//reload cfg
|
|
|
|
//we must stop & restart logging, or copy logging cfg!!!!
|
|
|
|
LOG_DBG("sesman received SIGHUP", 0);
|
|
|
|
//return 0;
|
|
|
|
break;
|
|
|
|
case SIGCHLD:
|
|
|
|
/* a session died */
|
|
|
|
LOG_DBG("sesman received SIGCHLD", 0);
|
|
|
|
sig_sesman_session_end(SIGCHLD);
|
|
|
|
break;
|
|
|
|
case SIGINT:
|
|
|
|
/* we die */
|
|
|
|
LOG_DBG("sesman received SIGINT", 0);
|
|
|
|
sig_sesman_shutdown(recv_signal);
|
|
|
|
break;
|
|
|
|
case SIGTERM:
|
|
|
|
/* we die */
|
|
|
|
LOG_DBG("sesman received SIGTERM", 0);
|
|
|
|
sig_sesman_shutdown(recv_signal);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while (1);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|