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293 lines
7.3 KiB
293 lines
7.3 KiB
/*
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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 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; /* config.h */
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extern int thread_sck;
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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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/*main program loop*/
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "listening...");
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g_sck = g_tcp_socket();
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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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in_sck = g_tcp_accept(g_sck);
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while (in_sck == -1 && g_tcp_last_error_would_block(g_sck))
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{
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g_sleep(1000);
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in_sck = g_tcp_accept(g_sck);
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}
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while (in_sck > 0)
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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(&(g_cfg->log), "new connection");
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thread_sck=in_sck;
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//scp_process_start((void*)in_sck);
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thread_scp_start(in_sck);
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/* once we've processed the connection, we go back listening */
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in_sck = g_tcp_accept(g_sck);
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while (in_sck == -1 && g_tcp_last_error_would_block(g_sck))
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{
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g_sleep(1000);
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in_sck = g_tcp_accept(g_sck);
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}
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}
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "listen error");
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}
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "bind error");
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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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int error;
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int daemon = 1;
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int pid;
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char pid_s[8];
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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], "-n")) ) )
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{
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/* starts sesman not daemonized */
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g_printf("starting sesman in foregroud...\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], "-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, --nodaemon starts sesman in foregroun\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_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], "-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(SESMAN_PID_FILE))
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{
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g_printf("sesman is not running (pid file not found - %s)\n",
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SESMAN_PID_FILE);
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g_exit(1);
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}
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fd = g_file_open(SESMAN_PID_FILE);
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if (-1 == fd)
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{
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g_printf("error opening pid file: %s\n", g_get_strerror());
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return 1;
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}
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error = g_file_read(fd, pid_s, 7);
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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_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(SESMAN_PID_FILE);
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}
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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_exit(1);
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}
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if (g_file_exist(SESMAN_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(SESMAN_PID_FILE);
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g_printf("\n");
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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_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_exit(1);
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}
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/* starting logging subsystem */
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error = log_start(&(g_cfg->log));
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if (error != LOG_STARTUP_OK)
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{
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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 start logging. quitting.\n");
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break;
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case LOG_ERROR_FILE_OPEN:
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g_printf("error opening log file. quitting.\n");
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break;
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}
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g_exit(1);
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}
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/* libscp initialization */
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scp_init(&(g_cfg->log));
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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_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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g_file_open("/dev/null");
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g_file_open("/dev/null");
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g_file_open("/dev/null");
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}
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/* initializing locks */
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lock_init();
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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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/*
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g_signal(1, sig_sesman_reload_cfg); / * SIGHUP * /
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g_signal(2, sig_sesman_shutdown); / * SIGINT * /
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g_signal(9, sig_sesman_shutdown); / * SIGKILL * /
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g_signal(15, sig_sesman_shutdown); / * SIGTERM * /
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g_signal_child_stop(cterm); / * SIGCHLD * /
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*/
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thread_sighandler_start();
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/* writing pid file */
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fd = g_file_open(SESMAN_PID_FILE);
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if (-1 == fd)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "error opening pid file: %s",
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g_get_strerror());
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log_end(&(g_cfg->log));
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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) + 1);
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g_file_close(fd);
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/* start program main loop */
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS, "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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g_create_dir("/tmp/.X11-unix");
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g_chmod_hex("/tmp/.X11-unix", 0x1777);
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}
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sesman_main_loop();
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if (!daemon)
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{
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log_end(&(g_cfg->log));
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}
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return 0;
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}
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