397 lines
10 KiB
C
397 lines
10 KiB
C
/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Jay Sorg 2004-2015
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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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/**
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*
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* @file sesman.c
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* @brief Main program file
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* @author Jay Sorg
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*
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*/
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#include "sesman.h"
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int g_sck;
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int g_pid;
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unsigned char g_fixedkey[8] = { 23, 82, 107, 6, 35, 78, 88, 7 };
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struct config_sesman *g_cfg; /* defined in config.h */
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tintptr g_term_event = 0;
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/******************************************************************************/
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/**
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*
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* @brief Starts sesman main loop
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*
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*/
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static void DEFAULT_CC
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sesman_main_loop(void)
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{
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int in_sck;
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int error;
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int robjs_count;
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int cont;
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tbus sck_obj;
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tbus robjs[8];
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/*main program loop*/
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log_message(LOG_LEVEL_INFO, "listening...");
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g_sck = g_tcp_socket();
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if (g_sck < 0)
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{
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log_message(LOG_LEVEL_ERROR, "error opening socket, g_tcp_socket() failed...");
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return;
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}
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g_tcp_set_non_blocking(g_sck);
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error = scp_tcp_bind(g_sck, g_cfg->listen_address, g_cfg->listen_port);
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if (error == 0)
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{
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error = g_tcp_listen(g_sck);
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if (error == 0)
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{
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sck_obj = g_create_wait_obj_from_socket(g_sck, 0);
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cont = 1;
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while (cont)
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{
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/* build the wait obj list */
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robjs_count = 0;
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robjs[robjs_count++] = sck_obj;
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robjs[robjs_count++] = g_term_event;
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/* wait */
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if (g_obj_wait(robjs, robjs_count, 0, 0, -1) != 0)
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{
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/* error, should not get here */
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g_sleep(100);
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}
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if (g_is_wait_obj_set(g_term_event)) /* term */
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{
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break;
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}
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if (g_is_wait_obj_set(sck_obj)) /* incoming connection */
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{
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in_sck = g_tcp_accept(g_sck);
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if ((in_sck == -1) && g_tcp_last_error_would_block(g_sck))
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{
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/* should not get here */
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g_sleep(100);
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}
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else if (in_sck == -1)
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{
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/* error, should not get here */
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break;
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}
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else
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{
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/* we've got a connection, so we pass it to scp code */
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LOG_DBG("new connection");
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scp_process_start((void*)(tintptr)in_sck);
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g_sck_close(in_sck);
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}
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}
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}
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g_delete_wait_obj_from_socket(sck_obj);
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}
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else
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{
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log_message(LOG_LEVEL_ERROR, "listen error %d (%s)",
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g_get_errno(), g_get_strerror());
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}
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}
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else
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{
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log_message(LOG_LEVEL_ERROR, "bind error on "
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"port '%s': %d (%s)", g_cfg->listen_port,
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g_get_errno(), g_get_strerror());
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}
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g_tcp_close(g_sck);
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}
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/******************************************************************************/
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int DEFAULT_CC
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main(int argc, char **argv)
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{
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int fd;
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enum logReturns log_error;
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int error;
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int daemon = 1;
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int pid;
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char pid_s[32];
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char text[256];
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char pid_file[256];
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char cfg_file[256];
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g_init("xrdp-sesman");
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g_snprintf(pid_file, 255, "%s/xrdp-sesman.pid", XRDP_PID_PATH);
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if (1 == argc)
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{
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/* no options on command line. normal startup */
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g_printf("starting sesman...\n");
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daemon = 1;
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}
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else if ((2 == argc) && ((0 == g_strcasecmp(argv[1], "--nodaemon")) ||
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(0 == g_strcasecmp(argv[1], "-nodaemon")) ||
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(0 == g_strcasecmp(argv[1], "-n")) ||
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(0 == g_strcasecmp(argv[1], "-ns"))))
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{
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/* starts sesman not daemonized */
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g_printf("starting sesman in foreground...\n");
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daemon = 0;
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}
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else if ((2 == argc) && ((0 == g_strcasecmp(argv[1], "--help")) ||
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(0 == g_strcasecmp(argv[1], "-help")) ||
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(0 == g_strcasecmp(argv[1], "-h"))))
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{
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/* help screen */
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g_printf("sesman - xrdp session manager\n\n");
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g_printf("usage: sesman [command]\n\n");
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g_printf("command can be one of the following:\n");
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g_printf("-n, -ns, --nodaemon starts sesman in foreground\n");
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g_printf("-k, --kill kills running sesman\n");
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g_printf("-h, --help shows this help\n");
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g_printf("if no command is specified, sesman is started in background");
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g_deinit();
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g_exit(0);
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}
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else if ((2 == argc) && ((0 == g_strcasecmp(argv[1], "--kill")) ||
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(0 == g_strcasecmp(argv[1], "-kill")) ||
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(0 == g_strcasecmp(argv[1], "-k"))))
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{
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/* killing running sesman */
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/* check if sesman is running */
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if (!g_file_exist(pid_file))
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{
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g_printf("sesman is not running (pid file not found - %s)\n", pid_file);
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g_deinit();
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g_exit(1);
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}
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fd = g_file_open(pid_file);
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if (-1 == fd)
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{
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g_printf("error opening pid file[%s]: %s\n", pid_file, g_get_strerror());
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return 1;
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}
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g_memset(pid_s, 0, sizeof(pid_s));
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error = g_file_read(fd, pid_s, 31);
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if (-1 == error)
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{
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g_printf("error reading pid file: %s\n", g_get_strerror());
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g_file_close(fd);
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g_deinit();
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g_exit(error);
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}
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g_file_close(fd);
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pid = g_atoi(pid_s);
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error = g_sigterm(pid);
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if (0 != error)
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{
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g_printf("error killing sesman: %s\n", g_get_strerror());
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}
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else
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{
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g_file_delete(pid_file);
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}
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g_deinit();
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g_exit(error);
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}
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else
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{
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/* there's something strange on the command line */
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g_printf("sesman - xrdp session manager\n\n");
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g_printf("error: invalid command line\n");
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g_printf("usage: sesman [ --nodaemon | --kill | --help ]\n");
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g_deinit();
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g_exit(1);
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}
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if (g_file_exist(pid_file))
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{
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g_printf("sesman is already running.\n");
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g_printf("if it's not running, try removing ");
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g_printf(pid_file);
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g_printf("\n");
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g_deinit();
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g_exit(1);
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}
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/* reading config */
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g_cfg = g_malloc(sizeof(struct config_sesman), 1);
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if (0 == g_cfg)
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{
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g_printf("error creating config: quitting.\n");
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g_deinit();
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g_exit(1);
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}
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//g_cfg->log.fd = -1; /* don't use logging before reading its config */
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if (0 != config_read(g_cfg))
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{
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g_printf("error reading config: %s\nquitting.\n", g_get_strerror());
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g_deinit();
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g_exit(1);
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}
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g_snprintf(cfg_file, 255, "%s/sesman.ini", XRDP_CFG_PATH);
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/* starting logging subsystem */
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log_error = log_start(cfg_file, "xrdp-sesman");
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if (log_error != LOG_STARTUP_OK)
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{
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switch (log_error)
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{
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case LOG_ERROR_MALLOC:
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g_writeln("error on malloc. cannot start logging. quitting.");
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break;
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case LOG_ERROR_FILE_OPEN:
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g_writeln("error opening log file [%s]. quitting.",
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getLogFile(text, 255));
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break;
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default:
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g_writeln("error");
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break;
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}
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g_deinit();
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g_exit(1);
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}
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/* libscp initialization */
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scp_init();
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if (daemon)
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{
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/* start of daemonizing code */
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g_pid = g_fork();
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if (0 != g_pid)
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{
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g_deinit();
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g_exit(0);
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}
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g_file_close(0);
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g_file_close(1);
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g_file_close(2);
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if (g_file_open("/dev/null") < 0)
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{
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}
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if (g_file_open("/dev/null") < 0)
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{
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}
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if (g_file_open("/dev/null") < 0)
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{
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}
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}
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/* signal handling */
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g_pid = g_getpid();
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/* old style signal handling is now managed synchronously by a
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* separate thread. uncomment this block if you need old style
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* signal handling and comment out thread_sighandler_start()
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* going back to old style for the time being
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* problem with the sigaddset functions in sig.c - jts */
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#if 1
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g_signal_hang_up(sig_sesman_reload_cfg); /* SIGHUP */
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g_signal_user_interrupt(sig_sesman_shutdown); /* SIGINT */
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g_signal_terminate(sig_sesman_shutdown); /* SIGTERM */
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g_signal_child_stop(sig_sesman_session_end); /* SIGCHLD */
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#endif
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#if 0
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thread_sighandler_start();
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#endif
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if (daemon)
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{
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/* writing pid file */
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fd = g_file_open(pid_file);
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if (-1 == fd)
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{
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log_message(LOG_LEVEL_ERROR,
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"error opening pid file[%s]: %s",
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pid_file, g_get_strerror());
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log_end();
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g_deinit();
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g_exit(1);
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}
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g_sprintf(pid_s, "%d", g_pid);
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g_file_write(fd, pid_s, g_strlen(pid_s));
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g_file_close(fd);
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}
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/* start program main loop */
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log_message(LOG_LEVEL_ALWAYS,
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"starting sesman with pid %d", g_pid);
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/* make sure the /tmp/.X11-unix directory exist */
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if (!g_directory_exist("/tmp/.X11-unix"))
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{
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if (!g_create_dir("/tmp/.X11-unix"))
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{
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log_message(LOG_LEVEL_ERROR,
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"sesman.c: error creating dir /tmp/.X11-unix");
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}
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g_chmod_hex("/tmp/.X11-unix", 0x1777);
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}
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g_snprintf(text, 255, "xrdp_sesman_%8.8x_main_term", g_pid);
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g_term_event = g_create_wait_obj(text);
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sesman_main_loop();
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/* clean up PID file on exit */
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if (daemon)
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{
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g_file_delete(pid_file);
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}
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g_delete_wait_obj(g_term_event);
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if (!daemon)
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{
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log_end();
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}
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g_deinit();
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return 0;
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}
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