ramkomd.c 6.63 KB
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/*
 * Detta {r serverns huvudprogram. Det kommer f|rhoppningsvis bli st|rre
 * {n det {r just nu...
 *
 * Created by Willf|r 31/3-90
 *
 * It has grown! /ceder
 */


#include <getopt.h>
#include <stdlib.h>
#include <signal.h>
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#include <stdio.h>
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#include <ctype.h>
#include <netdb.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <unistd.h>
#include "std-disclaimer.h"
#include <kom-types.h>
#include <kom-errno.h>
#include "s-string.h"
#include "internal-services.h"
#include "lyskomd.h"
#include "isc.h"
#include "smalloc.h"
#include "cache.h"
#include "log.h"
#include "com.h"
#include "connections.h"
#include "config.h"
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#include "exp.h"
#include "memory.h"
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#include "internal-connections.h"
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Kom_err		  kom_errno;
u_long		  err_stat;
Bool		  send_async_messages		= TRUE;


#ifdef DEBUG
int	buglevel = 0;
Bool	never_save = FALSE;
#endif



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EXPORT char datafilename[1024];   /* Full pathname to the database file */
EXPORT char backupfilename[1024]; /* Full pathname to the backup file */
EXPORT char textfilename[1024];	/* Full pathname to the text file. */
EXPORT char statisticfile[1024];	/* Dito to statistics file. */
EXPORT char pidfile[1024];		/* Dito pid-file. */
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INTERNAL char memusefile[1024];		/* Memory usage file. */
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char ip_client_port[80];        /* Port to listen to for clients */
char ip_mux_port[80];           /* Port to listen to for mux:es */

int listen_client = -1;		/* ISC listen identifier */
int listen_mux    = -1;         /*          -"-          */


static char *dbase_dir = NULL;  /* Directory where database resides */

static void
server_init( char * client_port, char * mux_port)
{
    /*
    ** Setup some parameters here
    */
    isc_setlogfn(&logv);
    isc_setallocfn(&smalloc, &srealloc, &sfree);
    /* isc_setabortfn(&restart_kom); */

    kom_server_mcb  = isc_initialize(NULL);
    
    if ( kom_server_mcb == NULL )
	restart_kom("server_init: can't isc_setup()\n");
    
    if ((listen_client = isc_listentcp(kom_server_mcb, client_port)) < 0)
        restart_kom("server_init: can't isc_listen(CLIENT)\n");

    if ((listen_mux = isc_listentcp(kom_server_mcb, mux_port)) < 0)
        restart_kom("server_init: can't isc_listen(MUX)\n");
    

    /*
     * Ignore SIGPIPE, which the server gets if it tries to write to a
     * socket and the client has died. The server will anyhow handle
     * this situation correct.
     */
    signal(SIGPIPE, SIG_IGN);
}

static void
init_data_base(const char *dbase_dir)
{
    String a = EMPTY_STRING, b = EMPTY_STRING, c = EMPTY_STRING,
	    d = EMPTY_STRING;

    if (dbase_dir == NULL)
      dbase_dir = DEFAULT_DBASE_DIR;
    
    sprintf(datafilename,   "%s/%s", dbase_dir, DATAFILE_NAME);
    sprintf(backupfilename, "%s/%s", dbase_dir, BACKUPFILE_NAME);
    sprintf(textfilename, "%s/%s", dbase_dir, TEXTFILE_NAME);
    sprintf(statisticfile, "%s/%s", dbase_dir, STATISTIC_NAME);
    sprintf(pidfile, "%s/%s", dbase_dir, PID_NAME);
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    sprintf(memusefile, "%s/%s", dbase_dir, MEMUSE_NAME);
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    log("Database = %s\n",  datafilename);
    log("Backup = %s\n", backupfilename);
    
    if ( init_cache() == FAILURE )
    {
	log ( "Setting up first four conferences.\n");

	if ( s_crea_str(&a, "Presentation (av nya) m|ten") != OK
	    || s_crea_str(&b, "Presentation (av nya) medlemmar") != OK
	    || s_crea_str(&c, "Lappar (p}) d|rren") != OK
	    || s_crea_str(&d, "Nyheter om LysKOM") != OK)
	{
	    restart_kom("init_data_base: can't create strings\n");
	}
	
	if ( ! (   do_create_conf(a, 0, 0, 0, NULL_CONF_TYPE)
		&& do_create_conf(b, 0, 0, 0, NULL_CONF_TYPE)
		&& do_create_conf(c, 0, 0, 0, NULL_CONF_TYPE)
		&& do_create_conf(d, 0, 0, 0, NULL_CONF_TYPE)))
	{
	    restart_kom("init_data_base: Kan ej skapa m|ten\n");
	}
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	s_clear(&a);
	s_clear(&b);
	s_clear(&c);
	s_clear(&d);
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    }
}

void
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sighandler_hup (int sig)
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{
    log ("Signal HUP received. Shutting down server.\n");
    go_and_die = TRUE;
}

void
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sighandler_quit (int sig)
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{
    log ("Signal QUIT received - syncing...\n");
    cache_sync_all();
    log ("Dumping core now.\n");
    chdir ("/usr/lyskom/etc");
    abort();
}

void
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sighandler_usr1 (int sig)
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{
    do_sync_db = TRUE;
}

void
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sighandler_usr2 (int sig)
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{
    int		  child;
    extern int	  fork(void);

    log ("Signal USR2 received - will dump core now.  (Check that child dies.)\n");
    if ((child = fork()) == 0)
    {
	chdir ("/usr/lyskom/etc");
	abort();
	log ("Abort() failed!!!");
	exit(1);
    }
    else if (child < 0)
    {
	log ("Couldn't fork.\n");
    }
    else
    {
	wait (NULL);
    }
}

void
save_pid(void)
{
    FILE *fp;

    if ( (fp = fopen(pidfile, "w")) == NULL )
	return;

    fprintf(fp, "%d", getpid());
    fclose(fp);
}

	
int
main (int    argc,
      char **argv)
{
    int i;
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    FILE *stat_file;
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    extern int number_of_allocated_strings(void); /* From s-string.c */
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    s_set_storage_management(smalloc, srealloc, sfree);
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    strcpy(ip_client_port, DEFAULT_CLIENT_SERVICE);
    strcpy(ip_mux_port,    DEFAULT_MUX_SERVICE);

    for (i = 1; i < argc && argv[i][0] == '-'; i++)
	switch (argv[i][1])
	{
	case 'd':
	    buglevel++;
	    break;

	case 'q':
	    never_save = TRUE;
	    break;
	    
	case 'D':		/* Database directory */
	    dbase_dir = argv[i]+2;
	    break;

	case 'p':		/* TCP/IP port number for clients */
	    strcpy(ip_client_port, argv[i]+2);
	    break;

	case 'P':		/* TCP/IP port number for MUXes */
	    strcpy(ip_mux_port, argv[i]+2);
	    break;

	case 'a':
	    send_async_messages = FALSE;
	    break;

	default:
	    restart_kom("usage: ramkomd [options]\n");
	}
    
    if (i < argc)
    {
	restart_kom("usage: ramkomd\n");
    }

    signal(SIGHUP, sighandler_hup);
    signal(SIGQUIT, sighandler_quit);
    signal(SIGUSR1, sighandler_usr1);
    signal(SIGUSR2, sighandler_usr2);
  
    server_init(ip_client_port, ip_mux_port);
    init_data_base(dbase_dir);
    save_pid();
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    toploop();
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    logout_all_clients();
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    isc_shutdown(kom_server_mcb);
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    cache_sync_all();
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    stat_file = fopen(memusefile, "w");

    if ( stat_file == NULL )
	restart_kom("Can't open file to save memory usage to.\n");

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    dump_cache_stats (stat_file);

    free_all_tmp();
    free_all_cache();

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    dump_smalloc_counts(stat_file);
    dump_alloc_counts(stat_file);
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    dump_cache_mem_usage(stat_file);
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    fprintf(stat_file, "---s-string.c:\n\tStrings:          %d\n",
	    number_of_allocated_strings());
    dump_allocated_connections(stat_file);
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    fclose (stat_file);

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    log("ramkomd terminated normally.\n");
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    return 0;
}

void
restart_kom(const char * format, ...)
{
    va_list AP;

    va_start(AP, format);
    logv(format, AP);
    va_end(AP);

    log("Previous message is fatal. Will dump core now.\n");
    abort();
}