Improve the hidden/undocumented 'modes' trace criteria, and document it'

[irc/evilnet/x3.git] / src / main.c

/* main.c - X3
 * Copyright 2000-2006 srvx Development Team
 *
 * This file is part of X3.
 *
 * srvx 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with srvx; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */

#define PID_FILE "x3.pid"

#include "conf.h"
#include "gline.h"
#include "ioset.h"
#include "modcmd.h"
#include "saxdb.h"
#include "mail.h"
#include "timeq.h"
#include "sar.h"
#include "shun.h"

#include "chanserv.h"
#include "global.h"
#include "modules.h"
#include "opserv.h"
#include "spamserv.h"

#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
#include "getopt.h"
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif

#include "main-common.c"

void sigaction_writedb(int x)
{
#ifndef HAVE_STRSIGNAL
    log_module(MAIN_LOG, LOG_INFO, "Signal %d -- writing databases.", x);
#else
    log_module(MAIN_LOG, LOG_INFO, "%s -- writing databases.", strsignal(x));
#endif
    do_write_dbs = 1;
}

void sigaction_exit(int x)
{
#ifndef HAVE_STRSIGNAL
    log_module(MAIN_LOG, LOG_INFO, "Signal %d -- exiting.", x);
#else
    log_module(MAIN_LOG, LOG_INFO, "%s -- exiting.", strsignal(x));
#endif
    irc_squit(self, "Exiting on signal from console.", NULL);
    quit_services = 1;
}

void sigaction_wait(UNUSED_ARG(int x))
{
    int code;
    wait4(-1, &code, WNOHANG, NULL);
}

void sigaction_rehash(int x)
{
#ifndef HAVE_STRSIGNAL
    log_module(MAIN_LOG, LOG_INFO, "Signal %d -- rehashing.", x);
#else
    log_module(MAIN_LOG, LOG_INFO, "%s -- rehashing.", strsignal(x));
#endif
    do_reopen = 1;
}

#if WITH_MALLOC_BOEHM_GC
void
gc_warn_proc(char *msg, GC_word arg)
{
    log_module(MAIN_LOG, LOG_ERROR, "GC(%p): %s", (void*)arg, msg);
}
#endif

int main(int argc, char *argv[])
{
    int run_as_daemon;
    int debug;
    pid_t pid = 0;
    FILE *file_out;
    struct sigaction sv;

#if WITH_MALLOC_BOEHM_GC
    GC_find_leak = 1;
    GC_set_warn_proc(gc_warn_proc);
    GC_enable_incremental();
#endif

    chdir(PREFIX);
    log_module(MAIN_LOG, LOG_INFO, "changed to %s\n", PREFIX);
    run_as_daemon = 1;
    debug = 0;
    tools_init();

    /* set up some signal handlers */
    memset(&sv, 0, sizeof(sv));
    sigemptyset(&sv.sa_mask);
    sv.sa_handler = SIG_IGN;
    sigaction(SIGPIPE, &sv, NULL);
    sv.sa_handler = sigaction_rehash;
    sigaction(SIGHUP, &sv, NULL);
    sv.sa_handler = sigaction_writedb;
    sigaction(SIGINT, &sv, NULL);
    sv.sa_handler = sigaction_exit;
    sigaction(SIGQUIT, &sv, NULL);
    sv.sa_handler = sigaction_wait;
    sigaction(SIGCHLD, &sv, NULL);

    if (argc > 1) { /* parse command line, if any */
        int c;
        struct option options[] =
        {
            {"config", 1, 0, 'c'},
            {"debug", 0, 0, 'd'},
            {"foreground", 0, 0, 'f'},
            {"help", 0, 0, 'h'},
            {"check", 0, 0, 'k'},
            {"replay", 1, 0, 'r'},
            {"version", 0, 0, 'v'},
            {0, 0, 0, 0}
        };

        while ((c = getopt_long(argc, argv, "c:dfhkr:v", options, NULL)) != -1) {
            switch (c) {
            case 'c':
                services_config = optarg;
                break;
            case 'k':
                if (conf_read(services_config)) {
                    printf("%s appears to be a valid configuration file.\n", services_config);
                } else {
                    printf("%s is an invalid configuration file.\n", services_config);
                }
                exit(0);
            case 'r':
                replay_file = fopen(optarg, "r");
                if (!replay_file) {
                    fprintf(stderr, "Could not open %s for reading: %s (%d)\n",
                            optarg, strerror(errno), errno);
                    exit(0);
                }
                break;
            case 'd':
                debug = 1;
                break;
            case 'f':
                run_as_daemon = 0;
                break;
            case 'v':
                version();
                license();
                exit(0);
            case 'h':
            default:
                usage(argv[0]);
                exit(0);
            }
        }
    }

    version();

    if (replay_file) {
        /* We read a line here to "prime" the replay file parser, but
         * mostly to get the right value of "now" for when we do the
         * irc_introduce. */
        replay_read_line();
    } else {
        now = time(NULL);
    }
    boot_time = now;

    fprintf(stdout, "Initializing daemon...\n");
    if (!conf_read(services_config)) {
        fprintf(stderr, "Unable to read %s.\n", services_config);
        exit(1);
    }

    conf_register_reload(uplink_compile);

    if (run_as_daemon) {
        /* Attempt to fork into the background if daemon mode is on. */
        pid = fork();
        if (pid < 0) {
            fprintf(stderr, "Unable to fork: %s\n", strerror(errno));
        } else if (pid > 0) {
            fprintf(stdout, "Forking into the background (pid: %d)...\n", pid);
            exit(0);
        }
        setsid();
    }

    file_out = fopen(PID_FILE, "w");
    if (file_out == NULL) {
        /* Create the main process' pid file */
        fprintf(stderr, "Unable to create PID file: %s", strerror(errno));
    } else {
        fprintf(file_out, "%i\n", (int)getpid());
        fclose(file_out);
    }

    if (run_as_daemon) {
        /* Close these since we should not use them from now on. */
        fclose(stdin);
        fclose(stdout);
        fclose(stderr);
    }

    services_argc = argc;
    services_argv = argv;

    atexit(call_exit_funcs);
    reg_exit_func(main_shutdown, NULL);

    log_init();
    MAIN_LOG = log_register_type("x3", "file:main.log");
    if (debug)
        log_debug();
    ioset_init();
    init_structs();
    init_parse();
    modcmd_init();
    saxdb_init();
    sar_init();
    gline_init();
    shun_init();
    mail_init();
    helpfile_init();
    conf_globals(); /* initializes the core services */
    conf_rlimits();
    modules_init();
    message_register_table(msgtab);
    modcmd_finalize();
    saxdb_finalize();
    helpfile_finalize();
    modules_finalize();

    /* The first exit func to be called *should* be saxdb_write_all(). */
    reg_exit_func(saxdb_write_all, NULL);
    if (replay_file) {
        char *msg;
        log_module(MAIN_LOG, LOG_INFO, "Beginning replay...");
        srand(now);
        replay_event_loop();
        if ((msg = dict_sanity_check(clients))) {
            log_module(MAIN_LOG, LOG_ERROR, "Clients insanity: %s", msg);
            free(msg);
        }
        if ((msg = dict_sanity_check(channels))) {
            log_module(MAIN_LOG, LOG_ERROR, "Channels insanity: %s", msg);
            free(msg);
        }
        if ((msg = dict_sanity_check(servers))) {
            log_module(MAIN_LOG, LOG_ERROR, "Servers insanity: %s", msg);
            free(msg);
        }
    } else {
        now = time(NULL);
        srand(now);
        ioset_run();
    }
    return 0;
}