157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2005-2008
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*/
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/**
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*
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* @file sig.c
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* @brief signal handling functions
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* @author Jay Sorg, Simone Fedele
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*
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*/
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#include "sesman.h"
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#include "signal.h"
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extern int g_sck;
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extern int g_pid;
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extern struct config_sesman g_cfg;
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/******************************************************************************/
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void DEFAULT_CC
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sig_sesman_shutdown(int sig)
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{
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log_message(&(g_cfg.log), LOG_LEVEL_INFO, "shutting down sesman %d", 1);
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if (g_getpid() != g_pid)
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{
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LOG_DBG("g_getpid() [%d] differs from g_pid [%d]", (g_getpid()), g_pid);
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return;
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}
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LOG_DBG(" - getting signal %d pid %d", sig, g_getpid());
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g_tcp_close(g_sck);
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session_sigkill_all();
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g_file_delete(SESMAN_PID_FILE);
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}
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/******************************************************************************/
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void DEFAULT_CC
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sig_sesman_reload_cfg(int sig)
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{
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struct config_sesman cfg;
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#warning FIXME reload configuration must NOT damage logging!
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log_message(&(g_cfg.log), LOG_LEVEL_WARNING, "receiving SIGHUP %d", 1);
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if (g_getpid() != g_pid)
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{
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LOG_DBG(&(g_cfg.log), "g_getpid() [%d] differs from g_pid [%d]", g_getpid(), g_pid);
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return;
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}
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if (config_read(&cfg) != 0)
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{
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log_message(&(g_cfg.log), LOG_LEVEL_ERROR, "error reading config - keeping old cfg");
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return;
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}
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g_cfg = cfg;
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log_message(&(g_cfg.log), LOG_LEVEL_INFO, "configuration reloaded");
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}
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/******************************************************************************/
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void DEFAULT_CC
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sig_sesman_session_end(int sig)
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{
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int pid;
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if (g_getpid() != g_pid)
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{
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return;
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}
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pid = g_waitchild();
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if (pid > 0)
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{
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session_kill(pid);
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}
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}
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/******************************************************************************/
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void* DEFAULT_CC
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sig_handler_thread(void* arg)
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{
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int recv_signal;
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sigset_t sigmask;
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sigset_t oldmask;
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sigset_t waitmask;
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/* mask signals to be able to wait for them... */
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sigfillset(&sigmask);
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/* it is a good idea not to block SIGILL SIGSEGV */
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/* SIGFPE -- see sigaction(2) NOTES */
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pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask);
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/* building the signal wait mask... */
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sigemptyset(&waitmask);
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sigaddset(&waitmask, SIGHUP);
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sigaddset(&waitmask, SIGCHLD);
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sigaddset(&waitmask, SIGTERM);
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// sigaddset(&waitmask, SIGFPE);
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// sigaddset(&waitmask, SIGILL);
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// sigaddset(&waitmask, SIGSEGV);
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do
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{
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LOG_DBG(&(g_cfg.log), "calling sigwait()",0);
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sigwait(&waitmask, &recv_signal);
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switch (recv_signal)
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{
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case SIGHUP:
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//reload cfg
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//we must stop & restart logging, or copy logging cfg!!!!
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LOG_DBG(&(g_cfg.log), "sesman received SIGHUP",0);
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//return 0;
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break;
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case SIGCHLD:
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/* a session died */
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LOG_DBG(&(g_cfg.log), "sesman received SIGCHLD",0);
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sig_sesman_session_end(SIGCHLD);
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break;
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/*case SIGKILL;
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/ * we die * /
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LOG_DBG("sesman received SIGKILL",0);
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sig_sesman_shutdown(recv_signal);
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break;*/
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case SIGTERM:
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/* we die */
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LOG_DBG(&(g_cfg.log), "sesman received SIGTERM",0);
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sig_sesman_shutdown(recv_signal);
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break;
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}
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} while (1);
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return 0;
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}
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