main.c

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <signal.h>
#include <stdarg.h>
#include <unistd.h>

#include "memory.h"
#include "config.h"
#include "lint.h"
#include "interpret.h"
#include "object.h"
#include "lex.h"
#include "exec.h"
#include "mudstat.h"
#include "comm1.h"
#include "simulate.h"
#include "main.h"
#include "backend.h"
#include "random.h"
#include "hash.h"

extern int current_line;

int d_flag = 0;	/* Run with debug */
int t_flag = 0;	/* Disable heart beat and reset */
int e_flag = 0;	/* Load empty, without castles. */
int s_flag = 0; /* Make statistics and dump to /MUDstatistics */
int no_ip_demon = 0;
int unlimited = 0; /* Run without eval cost limits */
int comp_flag = 0; /* Trace compilations */
int warnobsoleteflag = 0;
char *flag = NULL;
int driver_mtime;
char *mudlib_path = MUD_LIB;

void init_signals(void);
void create_object(struct object *ob);
void init_call_out(void);

#ifdef YYDEBUG
extern int yydebug;
#endif

int port_number = PORTNO;
#ifdef CATCH_UDP_PORT
int udp_port = CATCH_UDP_PORT;
#endif
#ifdef SERVICE_PORT
int service_port = SERVICE_PORT;
#endif
char *reserved_area;	/* reserved for malloc() */
struct svalue const0, const1, constempty;
struct closure funcempty;

double consts[5];

extern struct object *vbfc_object;

extern struct object *master_ob, *auto_ob;

void
usage(int argc, char **argv)
{
    fprintf(stderr, "Usage: %s -m <mudlib> -t <telnet port> -u <udp port> -p <service port>\n", argv[0]);
    fprintf(stderr, "Additional flags:\n");
    fprintf(stderr, " -f <flag>   Flag sent to mudlib before preloading\n");
    fprintf(stderr, " -d <flag>   Set debug flag\n");
    fprintf(stderr, " -D <define> Add a pre define\n"); 
    fprintf(stderr, " -O          Warn of use of obsolete functions\n");
    fprintf(stderr, " -e          Skip preloading\n");
    fprintf(stderr, " -c          Additional information about file compilation\n");
    fprintf(stderr, " -l          Unlimited eval cost\n");
    fprintf(stderr, " -S          Enable mudstatus\n");
    fprintf(stderr, " -y          YY debugging\n");
    fprintf(stderr, " -N          Do not start reverse lookup daemon\n");
    fprintf(stderr, "\n");
    exit(1);
}

void
parse_args(int argc, char **argv)
{
    int ch;

    while ((ch = getopt(argc, argv, "h?m:p:t:u:f:d:D:OeclNSy")) != -1)
    {
        switch (ch)
        {
        case 'm':
            mudlib_path = strdup(optarg);
            break;
        case 't':
            port_number = atoi(optarg);
            break;

        case 'u':
#ifdef CATCH_UDP_PORT
            udp_port = atoi(optarg);
#endif
            break;
        case 'p':
#ifdef SERVICE_PORT            
            service_port = atoi(optarg);
#endif
            break;
        case 'f':
            flag = strdup(optarg);
            continue;
        case 'e':
            e_flag++;
            continue;
        case 'D':
            add_pre_define(optarg);
            continue;
        case 'O':
            warnobsoleteflag++;
            continue;
        case 'd':
            d_flag = atoi(optarg);
            continue;
        case 'c':
            comp_flag++;
            continue;
        case 'l':
            unlimited++;
            continue;
        case 'N':
            no_ip_demon++;
            continue;
        case 'S':
            s_flag++;
            mudstatus_set(1, -1, -1); /* Statistics, default limits */
            continue;
        case 'y':
#ifdef YYDEBUG
            yydebug = 1;
#endif
        default:
        case '?':
            usage(argc, argv);
            break;
            
        }            
    }    
}

int 
main(int argc, char **argv)
{
    extern int game_is_being_shut_down;
    char *p;
    int i = 0;
    struct svalue *ret;
    extern struct svalue catch_value;
    extern void init_cfuns(void);
    struct gdexception exception_frame;

    (void)setlinebuf(stdout);

    parse_args(argc, argv);
    
    const0.type = T_NUMBER; const0.u.number = 0;
    const1.type = T_NUMBER; const1.u.number = 1;
    constempty.type = T_FUNCTION; constempty.u.func = &funcempty;
    funcempty.funtype = FUN_EMPTY;
    catch_value = const0;
    
    /*
     * Check that the definition of EXTRACT_UCHAR() is correct.
     */
    p = (char *)&i;
    *p = -10;
    if (EXTRACT_UCHAR(p) != 0x100 - 10)
    {
	(void)fprintf(stderr, "Bad definition of EXTRACT_UCHAR() in config.h.\n");
	exit(1);
    }
    set_current_time();

#ifdef PROFILE_LPC
    set_profile_timebase(60.0); /* One minute */
#endif

#if RESERVED_SIZE > 0
    reserved_area = malloc(RESERVED_SIZE);
#endif

    init_random();
    init_tasks();
    query_load_av();
    init_num_args();
    init_machine();
    init_cfuns();
    init_hash();

    /*
     * Set up the signal handling.
     */
    init_signals();

    if (chdir(mudlib_path) == -1) {
        (void)fprintf(stderr, "Bad mudlib directory: %s\n", MUD_LIB);
	exit(1);
    }

    if (setjmp(exception_frame.e_context))
    {
	clear_state();
	add_message("Anomaly in the fabric of world space.\n");
    } 
    else
    {
	exception_frame.e_exception = NULL;
	exception_frame.e_catch = 0;
	exception = &exception_frame;
	auto_ob = 0;
	master_ob = 0;
	
	if ((auto_ob = load_object("secure/auto", 1, 0, 0)) != NULL)
	{
	    add_ref(auto_ob, "main");
	    auto_ob->prog->flags |= PRAGMA_RESIDENT;
	}

	get_simul_efun();
	master_ob = load_object("secure/master", 1, 0, 0);
	if (master_ob)
	{
	    /*
	     * Make sure master_ob is never made a dangling pointer.
	     * Look at apply_master_ob() for more details.
	     */
	    add_ref(master_ob, "main");
	    master_ob->prog->flags |= PRAGMA_RESIDENT;
            resolve_master_fkntab();
	    create_object(master_ob);
            load_parse_information();
	    clear_state();
	}
    }
    exception = NULL;
    if (auto_ob == 0) 
    {
	(void)fprintf(stderr, "The file secure/auto must be loadable.\n");
	exit(1);
    }
    if (master_ob == 0) 
    {
	(void)fprintf(stderr, "The file secure/master must be loadable.\n");
	exit(1);
    }
    set_inc_list(apply_master_ob(M_DEFINE_INCLUDE_DIRS, 0));
    
    {
	struct svalue* ret1;

	ret1 = apply_master_ob(M_PREDEF_DEFINES, 0);
	if (ret1 && ret1->type == T_POINTER)
	{
	    int ii;

	    for (ii = 0; ii < ret1->u.vec->size; ii++)
		if (ret1->u.vec->item[ii].type == T_STRING)
		{
                    add_pre_define(ret1->u.vec->item[ii].u.string);
		}
	}
    }

    if (flag != NULL)
    {
        printf("Applying driver flag: %s\n", flag);
        push_string(flag, STRING_MSTRING);
        (void)apply_master_ob(M_FLAG, 1);

        if (game_is_being_shut_down)
        {
            (void)fprintf(stderr, "Shutdown by master object.\n");
            exit(0);
        }
    }

    /*
     * See to it that the mud name is always defined in compiled files
     */
    ret = apply_master_ob(M_GET_MUD_NAME, 0);

    if (ret && ret->type == T_STRING)
    {
	struct lpc_predef_s *tmp;
		
	tmp = (struct lpc_predef_s *)
	    xalloc(sizeof(struct lpc_predef_s));
	if (!tmp) 
	    fatal("xalloc failed\n");
	tmp->flag = string_copy(ret->u.string);
	tmp->next = lpc_predefs;
	lpc_predefs = tmp;
    }

    ret = apply_master_ob(M_GET_VBFC_OBJECT, 0);
    if (ret && ret->type == T_OBJECT)
    {
	vbfc_object = ret->u.ob;
	INCREF(vbfc_object->ref);
    }
    else
	vbfc_object = 0;

    if (game_is_being_shut_down)
	exit(1);

    init_call_out();
    preload_objects(e_flag);
    (void)apply_master_ob(M_FINAL_BOOT, 0);
    
    mainloop();

    return 0;
}

char *
string_copy(char *str)
{
    size_t len = strlen(str) + 1;
    char *p = xalloc(len);
    if (p == NULL)
        return NULL;
    strncpy(p, str, len);
    return p;
}

/*VARARGS1*/
void
debug_message(char *fmt, ...)
{
    va_list argp;
    char *f;

    static FILE *fp = NULL;
    char deb[PATH_MAX];
    char name[100];

    if (fp == NULL) {
	(void)gethostname(name,sizeof name);
	if ((f = strchr(name, '.')) != NULL)
	    *f = '\0';
	snprintf(deb, sizeof(deb), "%s.debug.log", name);
	fp = fopen(deb, "w");
	if (fp == NULL) {
	    perror(deb);
	    abort();
	}
    }

    va_start(argp, fmt);
    vfprintf(fp, fmt, argp);
    va_end(argp);
    fflush(fp);
}

void 
debug_message_svalue(struct svalue *v)
{
    if (v == 0)
    {
	debug_message("<NULL>");
	return;
    }
    switch(v->type)
    {
    case T_NUMBER:
	debug_message("%lld", v->u.number);
	return;
    case T_FLOAT:
	debug_message("%.18g", v->u.real);
	return;
    case T_STRING:
	debug_message("\"%s\"", v->u.string);
	return;
    case T_OBJECT:
	debug_message("OBJ(%s)", v->u.ob->name);
	return;
    case T_LVALUE:
	debug_message("Pointer to ");
	debug_message_svalue(v->u.lvalue);
	return;
    default:
	debug_message("<INVALID>\n");
	return;
    }
}

int slow_shut_down_to_do = 0;