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/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2005-2008
*/
/**
*
* @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;
/******************************************************************************/
void DEFAULT_CC
sig_sesman_shutdown(int sig)
{
log_message(&(g_cfg.log), 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_tcp_close(g_sck);
session_sigkill_all();
g_file_delete(SESMAN_PID_FILE);
}
/******************************************************************************/
void DEFAULT_CC
sig_sesman_reload_cfg(int sig)
{
struct config_sesman cfg;
#warning FIXME reload configuration must NOT damage logging!
log_message(&(g_cfg.log), LOG_LEVEL_WARNING, "receiving SIGHUP %d", 1);
if (g_getpid() != g_pid)
{
LOG_DBG(&(g_cfg.log), "g_getpid() [%d] differs from g_pid [%d]", g_getpid(), g_pid);
return;
}
if (config_read(&cfg) != 0)
{
log_message(&(g_cfg.log), LOG_LEVEL_ERROR, "error reading config - keeping old cfg");
return;
}
g_cfg = cfg;
log_message(&(g_cfg.log), LOG_LEVEL_INFO, "configuration reloaded");
}
/******************************************************************************/
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, 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(&(g_cfg.log), "sesman received SIGHUP",0);
//return 0;
break;
case SIGCHLD:
/* a session died */
LOG_DBG(&(g_cfg.log), "sesman received SIGCHLD",0);
sig_sesman_session_end(SIGCHLD);
break;
/*case SIGKILL;
/ * we die * /
LOG_DBG("sesman received SIGKILL",0);
sig_sesman_shutdown(recv_signal);
break;*/
case SIGTERM:
/* we die */
LOG_DBG(&(g_cfg.log), "sesman received SIGTERM",0);
sig_sesman_shutdown(recv_signal);
break;
}
} while (1);
return 0;
}
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