2012-09-20 07:51:34 +04:00
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/**
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* xrdp: A Remote Desktop Protocol server.
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*
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2013-06-08 21:51:53 +04:00
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* Copyright (C) Jay Sorg 2004-2013
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2012-09-20 07:51:34 +04:00
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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2005-10-06 23:25:29 +04:00
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/**
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*
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2005-11-14 01:06:49 +03:00
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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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2007-04-07 20:20:08 +04:00
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*
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2005-10-06 23:25:29 +04:00
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*/
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2017-03-03 07:33:23 +03:00
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#if defined(HAVE_CONFIG_H)
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#include <config_ac.h>
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#endif
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2017-01-05 00:13:20 +03:00
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#include <signal.h>
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2005-10-06 23:25:29 +04:00
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2017-01-05 00:13:20 +03:00
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#include "sesman.h"
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2006-07-14 00:15:21 +04:00
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2005-10-06 23:25:29 +04:00
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extern int g_sck;
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extern int g_pid;
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2012-09-20 07:51:34 +04:00
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extern struct config_sesman *g_cfg; /* in sesman.c */
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2008-12-28 11:15:40 +03:00
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extern tbus g_term_event;
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2005-10-06 23:25:29 +04:00
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2005-11-14 01:06:49 +03:00
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/******************************************************************************/
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2017-03-12 19:35:00 +03:00
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void
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2005-10-06 23:25:29 +04:00
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sig_sesman_shutdown(int sig)
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{
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2012-09-20 07:51:34 +04:00
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char pid_file[256];
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2009-05-19 08:23:49 +04:00
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2020-11-30 03:36:20 +03:00
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LOG(LOG_LEVEL_INFO, "shutting down sesman %d", 1);
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2006-04-24 01:54:12 +04:00
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2012-09-20 07:51:34 +04:00
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if (g_getpid() != g_pid)
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{
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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "g_getpid() [%d] differs from g_pid [%d]", (g_getpid()), g_pid);
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2012-09-20 07:51:34 +04:00
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return;
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}
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2006-04-24 01:54:12 +04:00
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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, " - getting signal %d pid %d", sig, g_getpid());
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2005-10-24 01:47:17 +04:00
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2012-09-20 07:51:34 +04:00
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g_set_wait_obj(g_term_event);
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2008-12-28 11:15:40 +03:00
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2012-09-20 07:51:34 +04:00
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session_sigkill_all();
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2007-04-07 20:20:08 +04:00
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2012-09-20 07:51:34 +04:00
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g_snprintf(pid_file, 255, "%s/xrdp-sesman.pid", XRDP_PID_PATH);
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g_file_delete(pid_file);
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2005-10-06 23:25:29 +04:00
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}
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2005-11-14 01:06:49 +03:00
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/******************************************************************************/
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2017-03-12 19:35:00 +03:00
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void
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2005-10-06 23:25:29 +04:00
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sig_sesman_reload_cfg(int sig)
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{
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2012-09-20 07:51:34 +04:00
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int error;
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struct config_sesman *cfg;
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2020-11-30 03:36:20 +03:00
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LOG(LOG_LEVEL_WARNING, "receiving SIGHUP %d", 1);
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2012-09-20 07:51:34 +04:00
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if (g_getpid() != g_pid)
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{
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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "g_getpid() [%d] differs from g_pid [%d]", g_getpid(), g_pid);
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2012-09-20 07:51:34 +04:00
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return;
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}
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2020-06-22 12:27:54 +03:00
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if ((cfg = config_read(g_cfg->sesman_ini)) == NULL)
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2012-09-20 07:51:34 +04:00
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{
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2020-11-30 03:36:20 +03:00
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LOG(LOG_LEVEL_ERROR, "error reading config - keeping old cfg");
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2012-09-20 07:51:34 +04:00
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return;
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}
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/* stop logging subsystem */
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log_end();
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2016-10-21 08:22:51 +03:00
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/* free old config data */
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config_free(g_cfg);
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2016-02-14 07:41:07 +03:00
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/* replace old config with newly read one */
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2012-09-20 07:51:34 +04:00
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g_cfg = cfg;
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/* start again logging subsystem */
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2020-12-28 14:03:36 +03:00
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error = log_start(g_cfg->sesman_ini, "xrdp-sesman", 0);
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2012-09-20 07:51:34 +04:00
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if (error != LOG_STARTUP_OK)
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{
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char buf[256];
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switch (error)
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{
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case LOG_ERROR_MALLOC:
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g_printf("error on malloc. cannot restart logging. log stops here, sorry.\n");
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break;
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case LOG_ERROR_FILE_OPEN:
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g_printf("error reopening log file [%s]. log stops here, sorry.\n", getLogFile(buf, 255));
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break;
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}
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}
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2020-11-30 03:36:20 +03:00
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LOG(LOG_LEVEL_INFO, "configuration reloaded, log subsystem restarted");
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2005-10-06 23:25:29 +04:00
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}
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2006-07-14 00:15:21 +04:00
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/******************************************************************************/
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2017-03-12 19:35:00 +03:00
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void
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2006-07-14 00:15:21 +04:00
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sig_sesman_session_end(int sig)
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{
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2012-09-20 07:51:34 +04:00
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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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2006-07-14 00:15:21 +04:00
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}
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/******************************************************************************/
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2017-03-12 19:35:00 +03:00
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void *
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2012-09-20 07:51:34 +04:00
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sig_handler_thread(void *arg)
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2006-07-14 00:15:21 +04:00
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{
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2012-09-20 07:51:34 +04:00
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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, SIGINT);
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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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2006-07-14 00:15:21 +04:00
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{
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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "calling sigwait()");
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2012-09-20 07:51:34 +04:00
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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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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "sesman received SIGHUP");
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2012-09-20 07:51:34 +04:00
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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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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "sesman received SIGCHLD");
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2012-09-20 07:51:34 +04:00
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sig_sesman_session_end(SIGCHLD);
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break;
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case SIGINT:
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/* we die */
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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "sesman received SIGINT");
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2012-09-20 07:51:34 +04:00
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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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2020-10-08 04:55:08 +03:00
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LOG_DEVEL(LOG_LEVEL_DEBUG, "sesman received SIGTERM");
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2012-09-20 07:51:34 +04:00
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sig_sesman_shutdown(recv_signal);
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break;
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}
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2006-07-14 00:15:21 +04:00
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}
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2012-09-20 07:51:34 +04:00
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while (1);
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2006-08-24 09:58:10 +04:00
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2012-09-20 07:51:34 +04:00
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return 0;
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2006-07-14 00:15:21 +04:00
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}
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