lbbs/src/fork.c

/***************************************************************************
                                                  fork.c  -  description
                                                         -------------------
        Copyright            : (C) 2004-2025 by Leaflet
        Email                : leaflet@leafok.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "common.h"
#include "bbs_main.h"
#include "log.h"
#include "io.h"
#include "fork.h"
#include "menu.h"
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>

int fork_server()
{
        int pid;

        pid = fork();

        if (pid > 0) // Parent process
        {
                SYS_child_process_count++;
                log_std("Child process (%d) start\n", pid);
                return 0;
        }
        else if (pid < 0) // Error
        {
                log_error("fork() error (%d)\n", errno);
                return -1;
        }

        // Child process
        if (close(socket_server) == -1)
        {
                log_error("Close server socket failed\n");
                return -2;
        }

        // Redirect Input
        close(STDIN_FILENO);
        if (dup2(socket_client, STDIN_FILENO) == -1)
        {
                log_error("Redirect stdin to client socket failed\n");
                return -3;
        }

        // Redirect Output
        close(STDOUT_FILENO);
        if (dup2(socket_client, STDOUT_FILENO) == -1)
        {
                log_error("Redirect stdout to client socket failed\n");
                return -4;
        }

        SYS_child_process_count = 0;

        // Reset signal handler to default
        signal(SIGHUP, SIG_DFL);
        signal(SIGCHLD, SIG_DFL);
        signal(SIGTERM, SIG_DFL);
        
        bbs_main();

        // Child process exit
        SYS_server_exit = 1;

        if (close(socket_client) == -1)
        {
                log_error("Close client socket failed\n");
        }

        // Close Input and Output for client
        close(STDIN_FILENO);
        close(STDOUT_FILENO);

        log_std("Process exit normally\n");
        log_end();

        _exit(0);
        
        return 0;
}
1	sysadm	1.1	/***************************************************************************
2	sysadm	1.12	fork.c - description
3			-------------------
4	sysadm	1.15	Copyright : (C) 2004-2025 by Leaflet
5			Email : leaflet@leafok.com
6	sysadm	1.1	***************************************************************************/
7
8			/***************************************************************************
9			* *
10			* This program is free software; you can redistribute it and/or modify *
11			* it under the terms of the GNU General Public License as published by *
12	sysadm	1.15	* the Free Software Foundation; either version 3 of the License, or *
13	sysadm	1.1	* (at your option) any later version. *
14			* *
15			***************************************************************************/
16
17	sysadm	1.2	#include "common.h"
18	sysadm	1.13	#include "bbs_main.h"
19			#include "log.h"
20	sysadm	1.7	#include "io.h"
21	sysadm	1.13	#include "fork.h"
22	sysadm	1.19	#include "menu.h"
23	sysadm	1.14	#include <stdio.h>
24	sysadm	1.7	#include <string.h>
25	sysadm	1.18	#include <signal.h>
26	sysadm	1.13	#include <unistd.h>
27			#include <stdlib.h>
28	sysadm	1.16	#include <errno.h>
29	sysadm	1.3
30	sysadm	1.12	int fork_server()
31	sysadm	1.3	{
32	sysadm	1.12	int pid;
33	sysadm	1.10
34	sysadm	1.14	pid = fork();
35
36			if (pid > 0) // Parent process
37	sysadm	1.12	{
38			SYS_child_process_count++;
39			log_std("Child process (%d) start\n", pid);
40			return 0;
41			}
42	sysadm	1.14	else if (pid < 0) // Error
43			{
44	sysadm	1.16	log_error("fork() error (%d)\n", errno);
45	sysadm	1.12	return -1;
46	sysadm	1.14	}
47	sysadm	1.12
48	sysadm	1.14	// Child process
49	sysadm	1.12	if (close(socket_server) == -1)
50			{
51			log_error("Close server socket failed\n");
52			return -2;
53			}
54
55			// Redirect Input
56	sysadm	1.14	close(STDIN_FILENO);
57			if (dup2(socket_client, STDIN_FILENO) == -1)
58	sysadm	1.12	{
59			log_error("Redirect stdin to client socket failed\n");
60			return -3;
61			}
62
63			// Redirect Output
64	sysadm	1.14	close(STDOUT_FILENO);
65			if (dup2(socket_client, STDOUT_FILENO) == -1)
66	sysadm	1.12	{
67			log_error("Redirect stdout to client socket failed\n");
68			return -4;
69			}
70
71	sysadm	1.18	SYS_child_process_count = 0;
72
73			// Reset signal handler to default
74			signal(SIGHUP, SIG_DFL);
75			signal(SIGCHLD, SIG_DFL);
76			signal(SIGTERM, SIG_DFL);
77
78	sysadm	1.12	bbs_main();
79
80	sysadm	1.17	// Child process exit
81			SYS_server_exit = 1;
82
83	sysadm	1.12	if (close(socket_client) == -1)
84			{
85			log_error("Close client socket failed\n");
86			}
87
88			// Close Input and Output for client
89	sysadm	1.14	close(STDIN_FILENO);
90			close(STDOUT_FILENO);
91	sysadm	1.9
92	sysadm	1.12	log_std("Process exit normally\n");
93			log_end();
94	sysadm	1.3
95	sysadm	1.19	_exit(0);
96
97	sysadm	1.12	return 0;
98	sysadm	1.3	}
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