/*
 * RAM $Id: comm.c 16 2008-10-22 04:42:21Z ram $
 */

/***************************************************************************
 *  Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer,        *
 *  Michael Seifert, Hans Henrik St{rfeldt, Tom Madsen, and Katja Nyboe.   *
 *                                                                         *
 *  Merc Diku Mud improvments copyright (C) 1992, 1993 by Michael          *
 *  Chastain, Michael Quan, and Mitchell Tse.                              *
 *                                                                         *
 *  In order to use any part of this Merc Diku Mud, you must comply with   *
 *  both the original Diku license in 'license.doc' as well the Merc       *
 *  license in 'license.txt'.  In particular, you may not remove either of *
 *  these copyright notices.                                               *
 *                                                                         *
 *  Thanks to abaddon for proof-reading our comm.c and pointing out bugs.  *
 *  Any remaining bugs are, of course, our work, not his.  :)              *
 *                                                                         *
 *  Much time and thought has gone into this software and you are          *
 *  benefitting.  We hope that you share your changes too.  What goes      *
 *  around, comes around.                                                  *
 ***************************************************************************/

/***************************************************************************
*       ROM 2.4 is copyright 1993-1998 Russ Taylor                         *
*       ROM has been brought to you by the ROM consortium                  *
*           Russ Taylor (rtaylor@hypercube.org)                            *
*           Gabrielle Taylor (gtaylor@hypercube.org)                       *
*           Brian Moore (zump@rom.org)                                     *
*       By using this code, you have agreed to follow the terms of the     *
*       ROM license, in the file Rom24/doc/rom.license                     *
***************************************************************************/

/*
 * This file contains all of the OS-dependent stuff:
 *   startup, signals, BSD sockets for tcp/ip, i/o, timing.
 *
 * The data flow for input is:
 *    Game_loop ---> Read_from_descriptor ---> Read
 *    Game_loop ---> Read_from_buffer
 *
 * The data flow for output is:
 *    Game_loop ---> Process_Output ---> Write_to_descriptor -> Write
 *
 * The OS-dependent functions are Read_from_descriptor and Write_to_descriptor.
 * -- Furey  26 Jan 1993
 */

#include <sys/types.h>
#include <sys/time.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/telnet.h>
#include <stdarg.h>

#if !defined(NOCRYPT)
#include "sha256.h"
#endif

#include "merc.h"
#include "recycle.h"
#include "tables.h"
#include "db.h"
#include "act.h"
#include "interp.h"

/*
 * Malloc debugging stuff.
 */
#if defined(MALLOC_DEBUG)
#include <malloc.h>
extern int              malloc_debug( int );
extern int              malloc_verify( void );
#endif

/*
 * Socket and TCP/IP stuff.
 */
const char              echo_off_str[] = { IAC, WILL, TELOPT_ECHO, '\0' };
const char              echo_on_str[] = { IAC, WONT, TELOPT_ECHO, '\0' };
const char              go_ahead_str[] = { IAC, GA, '\0' };

/*
 * Global variables.
 */
DESCRIPTOR_DATA        *descriptor_list;               /* All open descriptors */
bool                    god;                           /* All new chars are gods! */
bool                    merc_down;                     /* Shutdown */
bool                    wizlock;                       /* Game is wizlocked */
bool                    newlock;                       /* Game is newlocked */
char                    str_boot_time[MAX_INPUT_LENGTH];
time_t                  current_time;                  /* time of this pulse */

int main( int argc, char **argv )
{
    struct timeval          now_time;
    int                     port;
    int                     control;

    /*
     * Memory debugging if needed.
     */
#if defined(MALLOC_DEBUG)
    malloc_debug( 2 );
#endif

    /*
     * Init time.
     */
    gettimeofday( &now_time, NULL );
    current_time = ( time_t ) now_time.tv_sec;
    strcpy( str_boot_time, ctime( &current_time ) );

    /*
     * Get the port number.
     */
    port = 4000;
    if ( argc > 1 )
    {
        if ( !is_number( argv[1] ) )
        {
            proper_exit( 1, "Usage: %s [port #]\n", argv[0] );
        }
        else if ( ( port = atoi( argv[1] ) ) <= 1024 )
        {
            proper_exit( 1, "Port number must be above 1024.\n" );
        }
    }

    /*
     * Run the game.
     */
    control = init_socket( port );
    boot_db(  );
    sprintf( log_buf, "ROM is ready to rock on port %d.", port );
    log_string( log_buf );
    game_loop( control );
    close( control );

    /*
     * That's all, folks.
     */
    proper_exit( 0, "Normal termination of game." );
    return 0;
}

int init_socket( int port )
{
    static struct sockaddr_in sa_zero;
    struct sockaddr_in      sa;
    int                     x = 1;
    int                     fd;

    if ( ( fd = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
    {
        char                   *e = strerror( errno );

        proper_exit( 1, "Init_socket: socket: %s\n", e );
    }

    if ( setsockopt( fd, SOL_SOCKET, SO_REUSEADDR, ( char * ) &x, sizeof( x ) ) < 0 )
    {
        char                   *e = strerror( errno );

        close( fd );
        proper_exit( 1, "Init_socket: SO_REUSEADDR: %s\n", e );
    }

#if defined(SO_DONTLINGER) && !defined(SYSV)
    {
        struct linger           ld;

        ld.l_onoff = 1;
        ld.l_linger = 1000;

        if ( setsockopt( fd, SOL_SOCKET, SO_DONTLINGER,
                         ( char * ) &ld, sizeof( ld ) ) < 0 )
        {
            char                   *e = strerror( errno );

            close( fd );
            proper_exit( 1, "Init_socket: SO_DONTLINGER: %s\n", e );
        }
    }
#endif

    sa = sa_zero;
    sa.sin_family = AF_INET;
    sa.sin_port = htons( port );

    if ( bind( fd, ( struct sockaddr * ) &sa, sizeof( sa ) ) < 0 )
    {
        char                   *e = strerror( errno );

        close( fd );
        proper_exit( 1, "Init socket: bind: %s\n", e );
    }

    if ( listen( fd, 3 ) < 0 )
    {
        char                   *e = strerror( errno );

        close( fd );
        proper_exit( 1, "Init socket: listen: %s\n", e );
    }

    return fd;
}

void game_loop( int control )
{
    static struct timeval   null_time;
    struct timeval          last_time;
    DESCRIPTOR_DATA        *d_next;

    signal( SIGPIPE, SIG_IGN );
    signal( SIGINT, shutdown_request );
    signal( SIGTERM, shutdown_request );
    gettimeofday( &last_time, NULL );
    current_time = ( time_t ) last_time.tv_sec;

    /*
     * Main loop 
     */
    while ( !merc_down )
    {
        fd_set                  in_set;
        fd_set                  out_set;
        fd_set                  exc_set;
        DESCRIPTOR_DATA        *d;
        int                     maxdesc;

#if defined(MALLOC_DEBUG)
        if ( malloc_verify(  ) != 1 )
            abort(  );
#endif

        /*
         * Poll all active descriptors.
         */
        FD_ZERO( &in_set );
        FD_ZERO( &out_set );
        FD_ZERO( &exc_set );
        FD_SET( control, &in_set );
        maxdesc = control;
        for ( d = descriptor_list; d; d = d->next )
        {
            maxdesc = UMAX( maxdesc, d->descriptor );
            FD_SET( d->descriptor, &in_set );
            FD_SET( d->descriptor, &out_set );
            FD_SET( d->descriptor, &exc_set );
        }

        if ( select( maxdesc + 1, &in_set, &out_set, &exc_set, &null_time ) < 0 )
        {
            char                   *e = strerror( errno );

            proper_exit( 1, "Game_loop: select: poll: %s\n", e );
        }

        /*
         * New connection?
         */
        if ( FD_ISSET( control, &in_set ) )
            init_descriptor( control );

        /*
         * Kick out the freaky folks.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next = d->next;
            if ( FD_ISSET( d->descriptor, &exc_set ) )
            {
                FD_CLR( d->descriptor, &in_set );
                FD_CLR( d->descriptor, &out_set );
                if ( d->character && d->connected == CON_PLAYING )
                    save_char_obj( d->character );
                d->outtop = 0;
                close_socket( d );
            }
        }

        /*
         * Process input.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next = d->next;
            d->fcommand = FALSE;

            if ( FD_ISSET( d->descriptor, &in_set ) )
            {
                if ( d->character != NULL )
                    d->character->timer = 0;
                if ( !read_from_descriptor( d ) )
                {
                    FD_CLR( d->descriptor, &out_set );
                    if ( d->character != NULL && d->connected == CON_PLAYING )
                        save_char_obj( d->character );
                    d->outtop = 0;
                    close_socket( d );
                    continue;
                }
            }

            if ( d->character != NULL && d->character->daze > 0 )
                --d->character->daze;

            if ( d->character != NULL && d->character->wait > 0 )
            {
                --d->character->wait;
                continue;
            }

            read_from_buffer( d );
            if ( d->incomm[0] != '\0' )
            {
                d->fcommand = TRUE;
                stop_idling( d->character );

                if ( d->showstr_point )
                    show_string( d, d->incomm );
                else if ( d->connected == CON_PLAYING )
                    substitute_alias( d, d->incomm );
                else
                    nanny( d, d->incomm );

                d->incomm[0] = '\0';
            }
        }

        /*
         * Autonomous game motion.
         */
        update_handler(  );

        /*
         * Output.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next = d->next;

            if ( ( d->fcommand || d->outtop > 0 ) && FD_ISSET( d->descriptor, &out_set ) )
            {
                if ( !process_output( d, TRUE ) )
                {
                    if ( d->character != NULL && d->connected == CON_PLAYING )
                        save_char_obj( d->character );
                    d->outtop = 0;
                    close_socket( d );
                }
            }
        }

        /*
         * Synchronize to a clock.
         * Sleep( last_time + 1/PULSE_PER_SECOND - now ).
         * Careful here of signed versus unsigned arithmetic.
         */
        {
            struct timeval          now_time;
            int                     secDelta;
            int                     usecDelta;

            gettimeofday( &now_time, NULL );
            usecDelta = ( ( int ) last_time.tv_usec ) - ( ( int ) now_time.tv_usec )
                + 1000000 / PULSE_PER_SECOND;
            secDelta = ( ( int ) last_time.tv_sec ) - ( ( int ) now_time.tv_sec );
            while ( usecDelta < 0 )
            {
                usecDelta += 1000000;
                secDelta -= 1;
            }

            while ( usecDelta >= 1000000 )
            {
                usecDelta -= 1000000;
                secDelta += 1;
            }

            if ( secDelta > 0 || ( secDelta == 0 && usecDelta > 0 ) )
            {
                struct timeval          stall_time;

                stall_time.tv_usec = usecDelta;
                stall_time.tv_sec = secDelta;
                if ( select( 0, NULL, NULL, NULL, &stall_time ) < 0 )
                {
                    char                   *e = strerror( errno );

                    proper_exit( 1, "Game_loop: select: stall: %s\n", e );
                }
            }
        }

        gettimeofday( &last_time, NULL );
        current_time = ( time_t ) last_time.tv_sec;
    }

    return;
}

void init_descriptor( int control )
{
    char                    buf[MAX_STRING_LENGTH];
    DESCRIPTOR_DATA        *dnew;
    struct sockaddr_in      sock;
    struct hostent         *from;
    int                     desc;
    socklen_t               size;

    size = sizeof( sock );
    getsockname( control, ( struct sockaddr * ) &sock, &size );
    if ( ( desc = accept( control, ( struct sockaddr * ) &sock, &size ) ) < 0 )
    {
        perror( "New_descriptor: accept" );
        return;
    }

#if !defined(FNDELAY)
#define FNDELAY O_NDELAY
#endif

    if ( fcntl( desc, F_SETFL, FNDELAY ) == -1 )
    {
        perror( "New_descriptor: fcntl: FNDELAY" );
        return;
    }

    /*
     * Cons a new descriptor.
     */
    dnew = new_descriptor(  );

    dnew->descriptor = desc;
    dnew->connected = CON_GET_NAME;
    dnew->showstr_head = NULL;
    dnew->showstr_point = NULL;
    dnew->outsize = 2000;
    dnew->outbuf = ( char * ) alloc_mem( dnew->outsize );

    size = sizeof( sock );
    if ( getpeername( desc, ( struct sockaddr * ) &sock, &size ) < 0 )
    {
        perror( "New_descriptor: getpeername" );
        dnew->host = str_dup( "(unknown)" );
    }
    else
    {
        /*
         * Would be nice to use inet_ntoa here but it takes a struct arg,
         * which ain't very compatible between gcc and system libraries.
         */
        int                     addr;

        addr = ntohl( sock.sin_addr.s_addr );
        sprintf( buf, "%d.%d.%d.%d",
                 ( addr >> 24 ) & 0xFF, ( addr >> 16 ) & 0xFF,
                 ( addr >> 8 ) & 0xFF, ( addr ) & 0xFF );
        sprintf( log_buf, "Sock.sinaddr:  %s", buf );
        log_string( log_buf );
        from = gethostbyaddr( ( char * ) &sock.sin_addr,
                              sizeof( sock.sin_addr ), AF_INET );
        dnew->host = str_dup( from ? from->h_name : buf );
    }

    /*
     * Swiftest: I added the following to ban sites.  I don't
     * endorse banning of sites, but Copper has few descriptors now
     * and some people from certain sites keep abusing access by
     * using automated 'autodialers' and leaving connections hanging.
     *
     * Furey: added suffix check by request of Nickel of HiddenWorlds.
     */
    if ( check_ban( dnew->host, BAN_ALL ) )
    {
        write_to_descriptor( desc, "Your site has been banned from this mud.\n\r", 0 );
        close( desc );
        free_descriptor( dnew );
        return;
    }
    /*
     * Init descriptor data.
     */
    dnew->next = descriptor_list;
    descriptor_list = dnew;

    /*
     * Send the greeting.
     */
    {
        if ( help_greeting[0] == '.' )
            write_to_buffer( dnew, help_greeting + 1, 0 );
        else
            write_to_buffer( dnew, help_greeting, 0 );
    }

    return;
}

void close_socket( DESCRIPTOR_DATA *dclose )
{
    CHAR_DATA              *ch;

    if ( dclose->outtop > 0 )
        process_output( dclose, FALSE );

    if ( dclose->snoop_by != NULL )
    {
        write_to_buffer( dclose->snoop_by, "Your victim has left the game.\n\r", 0 );
    }

    {
        DESCRIPTOR_DATA        *d;

        for ( d = descriptor_list; d != NULL; d = d->next )
        {
            if ( d->snoop_by == dclose )
                d->snoop_by = NULL;
        }
    }

    if ( ( ch = dclose->character ) != NULL )
    {
        sprintf( log_buf, "Closing link to %s.", ch->name );
        log_string( log_buf );
        /*
         * cut down on wiznet spam when rebooting 
         */
        if ( dclose->connected == CON_PLAYING && !merc_down )
        {
            act( "$n has lost $s link.", ch, NULL, NULL, TO_ROOM );
            wiznet( "Net death has claimed $N.", ch, NULL, WIZ_LINKS, 0, 0 );
            ch->desc = NULL;
        }
        else
        {
            free_char( dclose->original ? dclose->original : dclose->character );
        }
    }

    /*
     * if ( d_next == dclose ) d_next = d_next->next; 
     */

    if ( dclose == descriptor_list )
    {
        descriptor_list = descriptor_list->next;
    }
    else
    {
        DESCRIPTOR_DATA        *d;

        for ( d = descriptor_list; d && d->next != dclose; d = d->next )
            ;
        if ( d != NULL )
            d->next = dclose->next;
        else
            bug( "Close_socket: dclose not found.", 0 );
    }

    close( dclose->descriptor );
    free_descriptor( dclose );
    return;
}

bool read_from_descriptor( DESCRIPTOR_DATA *d )
{
    size_t                  iStart;

    /*
     * Hold horses if pending command already. 
     */
    if ( d->incomm[0] != '\0' )
        return TRUE;

    /*
     * Check for overflow. 
     */
    iStart = strlen( d->inbuf );
    if ( iStart >= sizeof( d->inbuf ) - 10 )
    {
        sprintf( log_buf, "%s input overflow!", d->host );
        log_string( log_buf );
        write_to_descriptor( d->descriptor, "\n\r*** PUT A LID ON IT!!! ***\n\r", 0 );
        return FALSE;
    }

    /*
     * Snarf input. 
     */
    for ( ;; )
    {
        int                     nRead;

        nRead = read( ( int ) d->descriptor, ( void * ) ( d->inbuf + iStart ),
                      sizeof( d->inbuf ) - 10 - iStart );
        if ( nRead > 0 )
        {
            iStart += nRead;
            if ( d->inbuf[iStart - 1] == '\n' || d->inbuf[iStart - 1] == '\r' )
                break;
        }
        else if ( nRead == 0 )
        {
            log_string( "EOF encountered on read." );
            return FALSE;
        }
        else if ( errno == EWOULDBLOCK )
            break;
        else
        {
            perror( "Read_from_descriptor" );
            return FALSE;
        }
    }

    d->inbuf[iStart] = '\0';
    return TRUE;
}

/*
 * Transfer one line from input buffer to input line.
 */
void read_from_buffer( DESCRIPTOR_DATA *d )
{
    int                     i,
                            j,
                            k;

    /*
     * Hold horses if pending command already.
     */
    if ( d->incomm[0] != '\0' )
        return;

    /*
     * Look for at least one new line.
     */
    for ( i = 0; d->inbuf[i] != '\n' && d->inbuf[i] != '\r'; i++ )
    {
        if ( d->inbuf[i] == '\0' )
            return;
    }

    /*
     * Canonical input processing.
     */
    for ( i = 0, k = 0; d->inbuf[i] != '\n' && d->inbuf[i] != '\r'; i++ )
    {
        if ( k >= MAX_INPUT_LENGTH - 2 )
        {
            write_to_descriptor( d->descriptor, "Line too long.\n\r", 0 );

            /*
             * skip the rest of the line 
             */
            for ( ; d->inbuf[i] != '\0'; i++ )
            {
                if ( d->inbuf[i] == '\n' || d->inbuf[i] == '\r' )
                    break;
            }
            d->inbuf[i] = '\n';
            d->inbuf[i + 1] = '\0';
            break;
        }

        if ( d->inbuf[i] == '\b' && k > 0 )
            --k;
        else if ( isascii( d->inbuf[i] ) && isprint( d->inbuf[i] ) )
            d->incomm[k++] = d->inbuf[i];
    }

    /*
     * Finish off the line.
     */
    if ( k == 0 )
        d->incomm[k++] = ' ';
    d->incomm[k] = '\0';

    /*
     * Deal with bozos with #repeat 1000 ...
     */

    if ( k > 1 || d->incomm[0] == '!' )
    {
        if ( d->incomm[0] != '!' && strcmp( d->incomm, d->inlast ) )
        {
            d->repeat = 0;
        }
        else
        {
            if ( ++d->repeat >= 25 && d->character && d->connected == CON_PLAYING )
            {
                sprintf( log_buf, "%s input spamming!", d->host );
                log_string( log_buf );
                wiznet( "Spam spam spam $N spam spam spam spam spam!",
                        d->character, NULL, WIZ_SPAM, 0, get_trust( d->character ) );
                if ( d->incomm[0] == '!' )
                    wiznet( d->inlast, d->character, NULL, WIZ_SPAM, 0,
                            get_trust( d->character ) );
                else
                    wiznet( d->incomm, d->character, NULL, WIZ_SPAM, 0,
                            get_trust( d->character ) );

                d->repeat = 0;
/*
                write_to_descriptor( d->descriptor,
                    "\n\r*** PUT A LID ON IT!!! ***\n\r", 0 );
                strcpy( d->incomm, "quit" );
*/
            }
        }
    }

    /*
     * Do '!' substitution.
     */
    if ( d->incomm[0] == '!' )
        strcpy( d->incomm, d->inlast );
    else
        strcpy( d->inlast, d->incomm );

    /*
     * Shift the input buffer.
     */
    while ( d->inbuf[i] == '\n' || d->inbuf[i] == '\r' )
        i++;
    for ( j = 0; ( d->inbuf[j] = d->inbuf[i + j] ) != '\0'; j++ )
        ;
    return;
}

/*
 * Low level output function.
 */
bool process_output( DESCRIPTOR_DATA *d, bool fPrompt )
{
    /*
     * Bust a prompt.
     */
    if ( !merc_down && d->showstr_point )
        write_to_buffer( d, "[Hit Return to continue]\n\r", 0 );
    else if ( fPrompt && !merc_down && d->connected == CON_PLAYING )
    {
        CHAR_DATA              *ch;
        CHAR_DATA              *victim;

        ch = d->character;

        /*
         * battle prompt 
         */
        if ( ( victim = ch->fighting ) != NULL && can_see( ch, victim ) )
        {
            int                     percent;
            char                    wound[100];
            char                    buf[MAX_STRING_LENGTH];

            if ( victim->max_hit > 0 )
                percent = victim->hit * 100 / victim->max_hit;
            else
                percent = -1;

            if ( percent >= 100 )
                sprintf( wound, "is in excellent condition." );
            else if ( percent >= 90 )
                sprintf( wound, "has a few scratches." );
            else if ( percent >= 75 )
                sprintf( wound, "has some small wounds and bruises." );
            else if ( percent >= 50 )
                sprintf( wound, "has quite a few wounds." );
            else if ( percent >= 30 )
                sprintf( wound, "has some big nasty wounds and scratches." );
            else if ( percent >= 15 )
                sprintf( wound, "looks pretty hurt." );
            else if ( percent >= 0 )
                sprintf( wound, "is in awful condition." );
            else
                sprintf( wound, "is bleeding to death." );

            sprintf( buf, "%s %s \n\r",
                     IS_NPC( victim ) ? victim->short_descr : victim->name, wound );
            buf[0] = UPPER( buf[0] );
            write_to_buffer( d, buf, 0 );
        }

        ch = d->original ? d->original : d->character;
        if ( !IS_SET( ch->comm, COMM_COMPACT ) )
            write_to_buffer( d, "\n\r", 2 );

        if ( IS_SET( ch->comm, COMM_PROMPT ) )
            bust_a_prompt( d->character );

        if ( IS_SET( ch->comm, COMM_TELNET_GA ) )
            write_to_buffer( d, go_ahead_str, 0 );
    }

    /*
     * Short-circuit if nothing to write.
     */
    if ( d->outtop == 0 )
        return TRUE;

    /*
     * Snoop-o-rama.
     */
    if ( d->snoop_by != NULL )
    {
        if ( d->character != NULL )
            write_to_buffer( d->snoop_by, d->character->name, 0 );
        write_to_buffer( d->snoop_by, "> ", 2 );
        write_to_buffer( d->snoop_by, d->outbuf, d->outtop );
    }

    /*
     * OS-dependent output.
     */
    if ( !write_to_descriptor( d->descriptor, d->outbuf, d->outtop ) )
    {
        d->outtop = 0;
        return FALSE;
    }
    else
    {
        d->outtop = 0;
        return TRUE;
    }
}

/*
 * Bust a prompt (player settable prompt)
 * coded by Morgenes for Aldara Mud
 */
void bust_a_prompt( CHAR_DATA *ch )
{
    char                    buf[MAX_STRING_LENGTH];
    char                    buf2[MAX_STRING_LENGTH];
    const char             *str;
    const char             *i;
    char                   *point;
    char                    doors[MAX_INPUT_LENGTH];
    EXIT_DATA              *pexit;
    bool                    found;
    int                     door;

    point = buf;
    str = ch->prompt;
    if ( str == NULL || str[0] == '\0' )
    {
        sprintf( buf, "<%dhp %dm %dmv> %s", ch->hit, ch->mana, ch->move, ch->prefix );
        send_to_char( buf, ch );
        return;
    }

    if ( IS_SET( ch->comm, COMM_AFK ) )
    {
        send_to_char( "<AFK> ", ch );
        return;
    }

    while ( *str != '\0' )
    {
        if ( *str != '%' )
        {
            *point++ = *str++;
            continue;
        }
        ++str;
        switch ( *str )
        {
            default:
                i = " ";
                break;
            case 'e':
                found = FALSE;
                doors[0] = '\0';
                for ( door = 0; door < MAX_EXIT; door++ )
                {
                    if ( ( pexit = ch->in_room->exit[door] ) != NULL
                         && pexit->u1.to_room != NULL
                         && ( can_see_room( ch, pexit->u1.to_room )
                              || ( IS_AFFECTED( ch, AFF_INFRARED )
                                   && !IS_AFFECTED( ch, AFF_BLIND ) ) )
                         && !IS_SET( pexit->exit_info, EX_CLOSED ) )
                    {
                        found = TRUE;
                        strcat( doors, dir_abbrev[door] );
                    }
                }
                if ( !found )
                    strcat( buf, "none" );
                sprintf( buf2, "%s", doors );
                i = buf2;
                break;
            case 'c':
                sprintf( buf2, "%s", "\n\r" );
                i = buf2;
                break;
            case 'h':
                sprintf( buf2, "%d", ch->hit );
                i = buf2;
                break;
            case 'H':
                sprintf( buf2, "%d", ch->max_hit );
                i = buf2;
                break;
            case 'm':
                sprintf( buf2, "%d", ch->mana );
                i = buf2;
                break;
            case 'M':
                sprintf( buf2, "%d", ch->max_mana );
                i = buf2;
                break;
            case 'v':
                sprintf( buf2, "%d", ch->move );
                i = buf2;
                break;
            case 'V':
                sprintf( buf2, "%d", ch->max_move );
                i = buf2;
                break;
            case 'x':
                sprintf( buf2, "%d", ch->exp );
                i = buf2;
                break;
            case 'X':
                sprintf( buf2, "%d", IS_NPC( ch ) ? 0 :
                         ( ch->level + 1 ) * exp_per_level( ch,
                                                            ch->pcdata->points ) -
                         ch->exp );
                i = buf2;
                break;
            case 'g':
                sprintf( buf2, "%d", ch->gold );
                i = buf2;
                break;
            case 's':
                sprintf( buf2, "%d", ch->silver );
                i = buf2;
                break;
            case 'a':
                if ( ch->level > 9 )
                    sprintf( buf2, "%d", ch->alignment );
                else
                    sprintf( buf2, "%s", IS_GOOD( ch ) ? "good" : IS_EVIL( ch ) ?
                             "evil" : "neutral" );
                i = buf2;
                break;
            case 'r':
                if ( ch->in_room != NULL )
                    sprintf( buf2, "%s",
                             ( ( !IS_NPC( ch ) && IS_SET( ch->act, PLR_HOLYLIGHT ) ) ||
                               ( !IS_AFFECTED( ch, AFF_BLIND )
                                 && !room_is_dark( ch->in_room ) ) ) ? ch->in_room->
                             name : "darkness" );
                else
                    sprintf( buf2, " " );
                i = buf2;
                break;
            case 'R':
                if ( IS_IMMORTAL( ch ) && ch->in_room != NULL )
                    sprintf( buf2, "%d", ch->in_room->vnum );
                else
                    sprintf( buf2, " " );
                i = buf2;
                break;
            case 'z':
                if ( IS_IMMORTAL( ch ) && ch->in_room != NULL )
                    sprintf( buf2, "%s", ch->in_room->area->name );
                else
                    sprintf( buf2, " " );
                i = buf2;
                break;
            case '%':
                sprintf( buf2, "%%" );
                i = buf2;
                break;
        }
        ++str;
        while ( ( *point = *i ) != '\0' )
            ++point, ++i;
    }
    write_to_buffer( ch->desc, buf, point - buf );

    if ( ch->prefix[0] != '\0' )
        write_to_buffer( ch->desc, ch->prefix, 0 );
    return;
}

/*
 * Append onto an output buffer.
 */
void write_to_buffer( DESCRIPTOR_DATA *d, const char *txt, int length )
{
    /*
     * Find length in case caller didn't.
     */
    if ( length <= 0 )
        length = strlen( txt );

    /*
     * Initial \n\r if needed.
     */
    if ( d->outtop == 0 && !d->fcommand )
    {
        d->outbuf[0] = '\n';
        d->outbuf[1] = '\r';
        d->outtop = 2;
    }

    /*
     * Expand the buffer as needed.
     */
    while ( d->outtop + length >= d->outsize )
    {
        char                   *outbuf;

        if ( d->outsize >= 32000 )
        {
            bug( "Buffer overflow. Closing.\n\r", 0 );
            close_socket( d );
            return;
        }
        outbuf = ( char * ) alloc_mem( 2 * d->outsize );
        strncpy( outbuf, d->outbuf, d->outtop );
        free_mem( d->outbuf, d->outsize );
        d->outbuf = outbuf;
        d->outsize *= 2;
    }

    /*
     * Copy.
     */
    strncpy( d->outbuf + d->outtop, txt, length );
    d->outtop += length;
    return;
}

/*
 * Lowest level output function.
 * Write a block of text to the file descriptor.
 * If this gives errors on very long blocks (like 'ofind all'),
 *   try lowering the max block size.
 */
bool write_to_descriptor( int desc, const char *txt, int length )
{
    int                     iStart;
    int                     nWrite;
    size_t                  nBlock;

    if ( length <= 0 )
        length = strlen( txt );

    for ( iStart = 0; iStart < length; iStart += nWrite )
    {
        nBlock = UMIN( length - iStart, 4096 );
        if ( ( nWrite =
               write( ( int ) desc, ( const void * ) ( txt + iStart ), nBlock ) ) < 0 )
        {
            perror( "Write_to_descriptor" );
            return FALSE;
        }
    }

    return TRUE;
}

/*
 * Deal with sockets that haven't logged in yet.
 */
void nanny( DESCRIPTOR_DATA *d, const char *argument )
{
    DESCRIPTOR_DATA        *d_old,
                           *d_next;
    char                    buf[MAX_STRING_LENGTH];
    char                    arg[MAX_INPUT_LENGTH];
    CHAR_DATA              *ch;
    const char             *pwdnew;
    const char             *p;
    int                     iClass,
                            race,
                            i,
                            weapon;
    bool                    fOld;
    char                    local_argument[MAX_INPUT_LENGTH];
    const char             *lap = local_argument;

    while ( isspace( *argument ) )
        argument++;

    ch = d->character;

    switch ( d->connected )
    {

        default:
            bug( "Nanny: bad d->connected %d.", d->connected );
            close_socket( d );
            return;

        case CON_GET_NAME:
            if ( argument[0] == '\0' )
            {
                close_socket( d );
                return;
            }

            strcpy( local_argument, argument );
            local_argument[0] = UPPER( local_argument[0] );
            if ( !check_parse_name( lap ) )
            {
                write_to_buffer( d, "Illegal name, try another.\n\rName: ", 0 );
                return;
            }

            fOld = load_char_obj( d, lap );
            ch = d->character;

            if ( IS_SET( ch->act, PLR_DENY ) )
            {
                sprintf( log_buf, "Denying access to %s@%s.", lap, d->host );
                log_string( log_buf );
                write_to_buffer( d, "You are denied access.\n\r", 0 );
                close_socket( d );
                return;
            }

            if ( check_ban( d->host, BAN_PERMIT ) && !IS_SET( ch->act, PLR_PERMIT ) )
            {
                write_to_buffer( d, "Your site has been banned from this mud.\n\r", 0 );
                close_socket( d );
                return;
            }

            if ( check_reconnect( d, lap, FALSE ) )
            {
                fOld = TRUE;
            }
            else
            {
                if ( wizlock && !IS_IMMORTAL( ch ) )
                {
                    write_to_buffer( d, "The game is wizlocked.\n\r", 0 );
                    close_socket( d );
                    return;
                }
            }

            if ( fOld )
            {
                /*
                 * Old player 
                 */
                write_to_buffer( d, "Password: ", 0 );
                write_to_buffer( d, echo_off_str, 0 );
                d->connected = CON_GET_OLD_PASSWORD;
                return;
            }
            else
            {
                /*
                 * New player 
                 */
                if ( newlock )
                {
                    write_to_buffer( d, "The game is newlocked.\n\r", 0 );
                    close_socket( d );
                    return;
                }

                if ( check_ban( d->host, BAN_NEWBIES ) )
                {
                    write_to_buffer( d,
                                     "New players are not allowed from your site.\n\r",
                                     0 );
                    close_socket( d );
                    return;
                }

                sprintf( buf, "Did I get that right, %s (Y/N)? ", lap );
                write_to_buffer( d, buf, 0 );
                d->connected = CON_CONFIRM_NEW_NAME;
                return;
            }
            break;

        case CON_GET_OLD_PASSWORD:
            write_to_buffer( d, "\n\r", 2 );

            if ( strcmp( CRYPT( argument ), ch->pcdata->pwd ) )
            {
                write_to_buffer( d, "Wrong password.\n\r", 0 );
                close_socket( d );
                return;
            }

            write_to_buffer( d, echo_on_str, 0 );

            if ( check_playing( d, ch->name ) )
                return;

            if ( check_reconnect( d, ch->name, TRUE ) )
                return;

            sprintf( log_buf, "%s@%s has connected.", ch->name, d->host );
            log_string( log_buf );
            wiznet( log_buf, NULL, NULL, WIZ_SITES, 0, get_trust( ch ) );

            if ( IS_IMMORTAL( ch ) )
            {
                do_function( ch, &do_help, "imotd" );
                d->connected = CON_READ_IMOTD;
            }
            else
            {
                do_function( ch, &do_help, "motd" );
                d->connected = CON_READ_MOTD;
            }
            break;

/* RT code for breaking link */

        case CON_BREAK_CONNECT:
            switch ( *argument )
            {
                case 'y':
                case 'Y':
                    for ( d_old = descriptor_list; d_old != NULL; d_old = d_next )
                    {
                        d_next = d_old->next;
                        if ( d_old == d || d_old->character == NULL )
                            continue;

                        if ( str_cmp( ch->name, d_old->original ?
                                      d_old->original->name : d_old->character->name ) )
                            continue;

                        close_socket( d_old );
                    }
                    if ( check_reconnect( d, ch->name, TRUE ) )
                        return;
                    write_to_buffer( d, "Reconnect attempt failed.\n\rName: ", 0 );
                    if ( d->character != NULL )
                    {
                        free_char( d->character );
                        d->character = NULL;
                    }
                    d->connected = CON_GET_NAME;
                    break;

                case 'n':
                case 'N':
                    write_to_buffer( d, "Name: ", 0 );
                    if ( d->character != NULL )
                    {
                        free_char( d->character );
                        d->character = NULL;
                    }
                    d->connected = CON_GET_NAME;
                    break;

                default:
                    write_to_buffer( d, "Please type Y or N? ", 0 );
                    break;
            }
            break;

        case CON_CONFIRM_NEW_NAME:
            switch ( *argument )
            {
                case 'y':
                case 'Y':
                    sprintf( buf, "New character.\n\rGive me a password for %s: %s",
                             ch->name, echo_off_str );
                    write_to_buffer( d, buf, 0 );
                    d->connected = CON_GET_NEW_PASSWORD;
                    break;

                case 'n':
                case 'N':
                    write_to_buffer( d, "Ok, what IS it, then? ", 0 );
                    free_char( d->character );
                    d->character = NULL;
                    d->connected = CON_GET_NAME;
                    break;

                default:
                    write_to_buffer( d, "Please type Yes or No? ", 0 );
                    break;
            }
            break;

        case CON_GET_NEW_PASSWORD:
            write_to_buffer( d, "\n\r", 2 );

            if ( strlen( argument ) < 5 )
            {
                write_to_buffer( d,
                                 "Password must be at least five characters long.\n\rPassword: ",
                                 0 );
                return;
            }

            pwdnew = CRYPT( argument );
            for ( p = pwdnew; *p != '\0'; p++ )
            {
                if ( *p == '~' )
                {
                    write_to_buffer( d,
                                     "New password not acceptable, try again.\n\rPassword: ",
                                     0 );
                    return;
                }
            }

            free_string( ch->pcdata->pwd );
            ch->pcdata->pwd = str_dup( pwdnew );
            write_to_buffer( d, "Please retype password: ", 0 );
            d->connected = CON_CONFIRM_NEW_PASSWORD;
            break;

        case CON_CONFIRM_NEW_PASSWORD:
            write_to_buffer( d, "\n\r", 2 );

            if ( strcmp( CRYPT( argument ), ch->pcdata->pwd ) )
            {
                write_to_buffer( d, "Passwords don't match.\n\rRetype password: ", 0 );
                d->connected = CON_GET_NEW_PASSWORD;
                return;
            }

            write_to_buffer( d, echo_on_str, 0 );
            write_to_buffer( d, "The following races are available:\n\r  ", 0 );
            for ( race = 1; race_table[race].name != NULL; race++ )
            {
                if ( !race_table[race].pc_race )
                    break;
                write_to_buffer( d, race_table[race].name, 0 );
                write_to_buffer( d, " ", 1 );
            }
            write_to_buffer( d, "\n\r", 0 );
            write_to_buffer( d, "What is your race (help for more information)? ", 0 );
            d->connected = CON_GET_NEW_RACE;
            break;

        case CON_GET_NEW_RACE:
            one_argument( argument, arg );

            if ( !strcmp( arg, "help" ) )
            {
                argument = one_argument( argument, arg );
                if ( argument[0] == '\0' )
                    do_function( ch, &do_help, "race help" );
                else
                    do_function( ch, &do_help, argument );
                write_to_buffer( d,
                                 "What is your race (help for more information)? ", 0 );
                break;
            }

            race = race_lookup( argument );

            if ( race == 0 || !race_table[race].pc_race )
            {
                write_to_buffer( d, "That is not a valid race.\n\r", 0 );
                write_to_buffer( d, "The following races are available:\n\r  ", 0 );
                for ( race = 1; race_table[race].name != NULL; race++ )
                {
                    if ( !race_table[race].pc_race )
                        break;
                    write_to_buffer( d, race_table[race].name, 0 );
                    write_to_buffer( d, " ", 1 );
                }
                write_to_buffer( d, "\n\r", 0 );
                write_to_buffer( d,
                                 "What is your race? (help for more information) ", 0 );
                break;
            }

            ch->race = race;
            /*
             * initialize stats 
             */
            for ( i = 0; i < MAX_STATS; i++ )
                ch->perm_stat[i] = pc_race_table[race].stats[i];
            ch->affected_by = ch->affected_by | race_table[race].aff;
            ch->imm_flags = ch->imm_flags | race_table[race].imm;
            ch->res_flags = ch->res_flags | race_table[race].res;
            ch->vuln_flags = ch->vuln_flags | race_table[race].vuln;
            ch->form = race_table[race].form;
            ch->parts = race_table[race].parts;

            /*
             * add skills 
             */
            for ( i = 0; i < 5; i++ )
            {
                if ( pc_race_table[race].skills[i] == NULL )
                    break;
                group_add( ch, pc_race_table[race].skills[i], FALSE );
            }
            /*
             * add cost 
             */
            ch->pcdata->points = pc_race_table[race].points;
            ch->size = pc_race_table[race].size;

            write_to_buffer( d, "What is your sex (M/F)? ", 0 );
            d->connected = CON_GET_NEW_SEX;
            break;

        case CON_GET_NEW_SEX:
            switch ( argument[0] )
            {
                case 'm':
                case 'M':
                    ch->sex = SEX_MALE;
                    ch->pcdata->true_sex = SEX_MALE;
                    break;
                case 'f':
                case 'F':
                    ch->sex = SEX_FEMALE;
                    ch->pcdata->true_sex = SEX_FEMALE;
                    break;
                default:
                    write_to_buffer( d, "That's not a sex.\n\rWhat IS your sex? ", 0 );
                    return;
            }

            strcpy( buf, "Select a class [" );
            for ( iClass = 0; iClass < MAX_CLASS; iClass++ )
            {
                if ( iClass > 0 )
                    strcat( buf, " " );
                strcat( buf, class_table[iClass].name );
            }
            strcat( buf, "]: " );
            write_to_buffer( d, buf, 0 );
            d->connected = CON_GET_NEW_CLASS;
            break;

        case CON_GET_NEW_CLASS:
            iClass = class_lookup( argument );

            if ( iClass == -1 )
            {
                write_to_buffer( d, "That's not a class.\n\rWhat IS your class? ", 0 );
                return;
            }

            ch->iclass = iClass;

            sprintf( log_buf, "%s@%s new player.", ch->name, d->host );
            log_string( log_buf );
            wiznet( "Newbie alert!  $N sighted.", ch, NULL, WIZ_NEWBIE, 0, 0 );
            wiznet( log_buf, NULL, NULL, WIZ_SITES, 0, get_trust( ch ) );

            write_to_buffer( d, "\n\r", 2 );
            write_to_buffer( d, "You may be good, neutral, or evil.\n\r", 0 );
            write_to_buffer( d, "Which alignment (G/N/E)? ", 0 );
            d->connected = CON_GET_ALIGNMENT;
            break;

        case CON_GET_ALIGNMENT:
            switch ( argument[0] )
            {
                case 'g':
                case 'G':
                    ch->alignment = 750;
                    break;
                case 'n':
                case 'N':
                    ch->alignment = 0;
                    break;
                case 'e':
                case 'E':
                    ch->alignment = -750;
                    break;
                default:
                    write_to_buffer( d, "That's not a valid alignment.\n\r", 0 );
                    write_to_buffer( d, "Which alignment (G/N/E)? ", 0 );
                    return;
            }

            write_to_buffer( d, "\n\r", 0 );

            group_add( ch, "rom basics", FALSE );
            group_add( ch, class_table[ch->iclass].base_group, FALSE );
            ch->pcdata->learned[gsn_recall] = 50;
            write_to_buffer( d, "Do you wish to customize this character?\n\r", 0 );
            write_to_buffer( d,
                             "Customization takes time, but allows a wider range of skills and abilities.\n\r",
                             0 );
            write_to_buffer( d, "Customize (Y/N)? ", 0 );
            d->connected = CON_DEFAULT_CHOICE;
            break;

        case CON_DEFAULT_CHOICE:
            write_to_buffer( d, "\n\r", 2 );
            switch ( argument[0] )
            {
                case 'y':
                case 'Y':
                    ch->gen_data = new_gen_data(  );
                    ch->gen_data->points_chosen = ch->pcdata->points;
                    do_function( ch, &do_help, "group header" );
                    list_group_costs( ch );
                    write_to_buffer( d, "You already have the following skills:\n\r", 0 );
                    do_function( ch, &do_skills, "" );
                    do_function( ch, &do_help, "menu choice" );
                    d->connected = CON_GEN_GROUPS;
                    break;
                case 'n':
                case 'N':
                    group_add( ch, class_table[ch->iclass].default_group, TRUE );
                    write_to_buffer( d, "\n\r", 2 );
                    write_to_buffer( d,
                                     "Please pick a weapon from the following choices:\n\r",
                                     0 );
                    buf[0] = '\0';
                    for ( i = 0; weapon_table[i].name != NULL; i++ )
                        if ( ch->pcdata->learned[*weapon_table[i].gsn] > 0 )
                        {
                            strcat( buf, weapon_table[i].name );
                            strcat( buf, " " );
                        }
                    strcat( buf, "\n\rYour choice? " );
                    write_to_buffer( d, buf, 0 );
                    d->connected = CON_PICK_WEAPON;
                    break;
                default:
                    write_to_buffer( d, "Please answer (Y/N)? ", 0 );
                    return;
            }
            break;

        case CON_PICK_WEAPON:
            write_to_buffer( d, "\n\r", 2 );
            weapon = weapon_lookup( argument );
            if ( weapon == -1 || ch->pcdata->learned[*weapon_table[weapon].gsn] <= 0 )
            {
                write_to_buffer( d, "That's not a valid selection. Choices are:\n\r", 0 );
                buf[0] = '\0';
                for ( i = 0; weapon_table[i].name != NULL; i++ )
                    if ( ch->pcdata->learned[*weapon_table[i].gsn] > 0 )
                    {
                        strcat( buf, weapon_table[i].name );
                        strcat( buf, " " );
                    }
                strcat( buf, "\n\rYour choice? " );
                write_to_buffer( d, buf, 0 );
                return;
            }

            ch->pcdata->learned[*weapon_table[weapon].gsn] = 40;
            write_to_buffer( d, "\n\r", 2 );
            do_function( ch, &do_help, "motd" );
            d->connected = CON_READ_MOTD;
            break;

        case CON_GEN_GROUPS:
            send_to_char( "\n\r", ch );

            if ( !str_cmp( argument, "done" ) )
            {
                if ( ch->pcdata->points == pc_race_table[ch->race].points )
                {
                    send_to_char( "You didn't pick anything.\n\r", ch );
                    break;
                }

                if ( ch->pcdata->points <= 40 + pc_race_table[ch->race].points )
                {
                    sprintf( buf,
                             "You must take at least %d points of skills and groups",
                             40 + pc_race_table[ch->race].points );
                    send_to_char( buf, ch );
                    break;
                }

                sprintf( buf, "Creation points: %d\n\r", ch->pcdata->points );
                send_to_char( buf, ch );
                sprintf( buf, "Experience per level: %d\n\r",
                         exp_per_level( ch, ch->gen_data->points_chosen ) );
                if ( ch->pcdata->points < 40 )
                    ch->train = ( 40 - ch->pcdata->points + 1 ) / 2;
                free_gen_data( ch->gen_data );
                ch->gen_data = NULL;
                send_to_char( buf, ch );
                write_to_buffer( d, "\n\r", 2 );
                write_to_buffer( d,
                                 "Please pick a weapon from the following choices:\n\r",
                                 0 );
                buf[0] = '\0';
                for ( i = 0; weapon_table[i].name != NULL; i++ )
                    if ( ch->pcdata->learned[*weapon_table[i].gsn] > 0 )
                    {
                        strcat( buf, weapon_table[i].name );
                        strcat( buf, " " );
                    }
                strcat( buf, "\n\rYour choice? " );
                write_to_buffer( d, buf, 0 );
                d->connected = CON_PICK_WEAPON;
                break;
            }

            if ( !parse_gen_groups( ch, argument ) )
                send_to_char
                    ( "Choices are: list,learned,premise,add,drop,info,help, and done.\n\r",
                      ch );

            do_function( ch, &do_help, "menu choice" );
            break;

        case CON_READ_IMOTD:
            write_to_buffer( d, "\n\r", 2 );
            do_function( ch, &do_help, "motd" );
            d->connected = CON_READ_MOTD;
            break;

        case CON_READ_MOTD:
            if ( ch->pcdata == NULL || ch->pcdata->pwd[0] == '\0' )
            {
                write_to_buffer( d, "Warning! Null password!\n\r", 0 );
                write_to_buffer( d, "Please report old password with bug.\n\r", 0 );
                write_to_buffer( d,
                                 "Type 'password null <new password>' to fix.\n\r", 0 );
            }

            write_to_buffer( d,
                             "\n\rWelcome to ROM 2.4.  Please do not feed the mobiles.\n\r",
                             0 );
            ch->next = char_list;
            char_list = ch;
            d->connected = CON_PLAYING;
            reset_char( ch );

            if ( ch->level == 0 )
            {

                ch->perm_stat[class_table[ch->iclass].attr_prime] += 3;

                ch->level = 1;
                ch->exp = exp_per_level( ch, ch->pcdata->points );
                ch->hit = ch->max_hit;
                ch->mana = ch->max_mana;
                ch->move = ch->max_move;
                ch->train = 3;
                ch->practice = 5;
                sprintf( buf, "the %s",
                         title_table[ch->iclass][ch->level]
                         [ch->sex == SEX_FEMALE ? 1 : 0] );
                set_title( ch, buf );

                do_function( ch, &do_outfit, "" );
                obj_to_char( create_object( get_obj_index( OBJ_VNUM_MAP ), 0 ), ch );

                char_to_room( ch, get_room_index( ROOM_VNUM_SCHOOL ) );
                send_to_char( "\n\r", ch );
                do_function( ch, &do_help, "newbie info" );
                send_to_char( "\n\r", ch );
            }
            else if ( ch->in_room != NULL )
            {
                char_to_room( ch, ch->in_room );
            }
            else if ( IS_IMMORTAL( ch ) )
            {
                char_to_room( ch, get_room_index( ROOM_VNUM_CHAT ) );
            }
            else
            {
                char_to_room( ch, get_room_index( ROOM_VNUM_TEMPLE ) );
            }

            act( "$n has entered the game.", ch, NULL, NULL, TO_ROOM );
            do_function( ch, &do_look, "auto" );

            wiznet( "$N has left real life behind.", ch, NULL,
                    WIZ_LOGINS, WIZ_SITES, get_trust( ch ) );

            if ( ch->pet != NULL )
            {
                char_to_room( ch->pet, ch->in_room );
                act( "$n has entered the game.", ch->pet, NULL, NULL, TO_ROOM );
            }

            do_function( ch, &do_unread, "" );
            break;
    }

    return;
}

/*
 * Parse a name for acceptability.
 */
bool check_parse_name( const char *name )
{
    int                     clan;

    /*
     * Reserved words.
     */
    if ( is_exact_name( name, "all auto immortal self someone something the you loner" ) )
    {
        return FALSE;
    }

    /*
     * check clans 
     */
    for ( clan = 0; clan < MAX_CLAN; clan++ )
    {
        if ( LOWER( name[0] ) == LOWER( clan_table[clan].name[0] )
             && !str_cmp( name, clan_table[clan].name ) )
            return FALSE;
    }

    if ( str_cmp( capitalize( name ), "Alander" ) && ( !str_prefix( "Alan", name )
                                                       || !str_suffix( "Alander",
                                                                       name ) ) )
        return FALSE;

    /*
     * Length restrictions.
     */

    if ( strlen( name ) < 2 )
        return FALSE;

    if ( strlen( name ) > 12 )
        return FALSE;

    /*
     * Alphanumerics only.
     * Lock out IllIll twits.
     */
    {
        const char             *pc;
        bool                    fIll,
                                adjcaps = FALSE,
            cleancaps = FALSE;
        size_t                  total_caps = 0;

        fIll = TRUE;
        for ( pc = name; *pc != '\0'; pc++ )
        {
            if ( !isalpha( *pc ) )
                return FALSE;

            if ( isupper( *pc ) )                      /* ugly anti-caps hack */
            {
                if ( adjcaps )
                    cleancaps = TRUE;
                total_caps++;
                adjcaps = TRUE;
            }
            else
                adjcaps = FALSE;

            if ( LOWER( *pc ) != 'i' && LOWER( *pc ) != 'l' )
                fIll = FALSE;
        }

        if ( fIll )
            return FALSE;

        if ( cleancaps || ( total_caps > ( strlen( name ) ) / 2 && strlen( name ) < 3 ) )
            return FALSE;
    }

    /*
     * Prevent players from naming themselves after mobs.
     */
    {
        MOB_INDEX_DATA         *pMobIndex;
        int                     iHash;

        for ( iHash = 0; iHash < MAX_KEY_HASH; iHash++ )
        {
            for ( pMobIndex = mob_index_hash[iHash];
                  pMobIndex != NULL; pMobIndex = pMobIndex->next )
            {
                if ( is_name( name, pMobIndex->player_name ) )
                    return FALSE;
            }
        }
    }

    return TRUE;
}

/*
 * Look for link-dead player to reconnect.
 */
bool check_reconnect( DESCRIPTOR_DATA *d, const char *name, bool fConn )
{
    CHAR_DATA              *ch;

    for ( ch = char_list; ch != NULL; ch = ch->next )
    {
        if ( !IS_NPC( ch )
             && ( !fConn || ch->desc == NULL )
             && !str_cmp( d->character->name, ch->name ) )
        {
            if ( fConn == FALSE )
            {
                free_string( d->character->pcdata->pwd );
                d->character->pcdata->pwd = str_dup( ch->pcdata->pwd );
            }
            else
            {
                free_char( d->character );
                d->character = ch;
                ch->desc = d;
                ch->timer = 0;
                send_to_char( "Reconnecting. Type replay to see missed tells.\n\r", ch );
                act( "$n has reconnected.", ch, NULL, NULL, TO_ROOM );

                sprintf( log_buf, "%s@%s reconnected.", ch->name, d->host );
                log_string( log_buf );
                wiznet( "$N groks the fullness of $S link.", ch, NULL, WIZ_LINKS, 0, 0 );
                d->connected = CON_PLAYING;
            }
            return TRUE;
        }
    }

    return FALSE;
}

/*
 * Check if already playing.
 */
bool check_playing( DESCRIPTOR_DATA *d, const char *name )
{
    DESCRIPTOR_DATA        *dold;

    for ( dold = descriptor_list; dold; dold = dold->next )
    {
        if ( dold != d
             && dold->character != NULL
             && dold->connected != CON_GET_NAME
             && dold->connected != CON_GET_OLD_PASSWORD
             && !str_cmp( name, dold->original
                          ? dold->original->name : dold->character->name ) )
        {
            write_to_buffer( d, "That character is already playing.\n\r", 0 );
            write_to_buffer( d, "Do you wish to connect anyway (Y/N)?", 0 );
            d->connected = CON_BREAK_CONNECT;
            return TRUE;
        }
    }

    return FALSE;
}

void stop_idling( CHAR_DATA *ch )
{
    if ( ch == NULL
         || ch->desc == NULL
         || ch->desc->connected != CON_PLAYING
         || ch->was_in_room == NULL || ch->in_room != get_room_index( ROOM_VNUM_LIMBO ) )
        return;

    ch->timer = 0;
    char_from_room( ch );
    char_to_room( ch, ch->was_in_room );
    ch->was_in_room = NULL;
    act( "$n has returned from the void.", ch, NULL, NULL, TO_ROOM );
    return;
}

/*
 * Write to one char.
 */
void send_to_char( const char *txt, CHAR_DATA *ch )
{
    if ( txt != NULL && ch->desc != NULL )
        write_to_buffer( ch->desc, txt, strlen( txt ) );
    return;
}

/*
 * Send a page to one char.
 */
void page_to_char( const char *txt, CHAR_DATA *ch )
{
    if ( txt == NULL || ch->desc == NULL )
        return;

    if ( ch->lines == 0 )
    {
        send_to_char( txt, ch );
        return;
    }

    ch->desc->showstr_head = ( char * ) alloc_mem( strlen( txt ) + 1 );
    strcpy( ch->desc->showstr_head, txt );
    ch->desc->showstr_point = ch->desc->showstr_head;
    show_string( ch->desc, "" );
}

/* string pager */
void show_string( struct descriptor_data *d, const char *input )
{
    char                    buffer[4 * MAX_STRING_LENGTH];
    char                    buf[MAX_INPUT_LENGTH];
    register char          *scan,
                           *chk;
    int                     lines = 0,
        toggle = 1;
    int                     show_lines;

    one_argument( input, buf );
    if ( buf[0] != '\0' )
    {
        if ( d->showstr_head )
        {
            free_mem( d->showstr_head, strlen( d->showstr_head ) );
            d->showstr_head = 0;
        }
        d->showstr_point = 0;
        return;
    }

    if ( d->character )
        show_lines = d->character->lines;
    else
        show_lines = 0;

    for ( scan = buffer;; scan++, d->showstr_point++ )
    {
        if ( ( ( *scan = *d->showstr_point ) == '\n' || *scan == '\r' )
             && ( toggle = -toggle ) < 0 )
            lines++;

        else if ( !*scan || ( show_lines > 0 && lines >= show_lines ) )
        {
            *scan = '\0';
            write_to_buffer( d, buffer, strlen( buffer ) );
            for ( chk = d->showstr_point; isspace( *chk ); chk++ );
            {
                if ( !*chk )
                {
                    if ( d->showstr_head )
                    {
                        free_mem( d->showstr_head, strlen( d->showstr_head ) );
                        d->showstr_head = 0;
                    }
                    d->showstr_point = 0;
                }
            }
            return;
        }
    }
    return;
}

/* quick sex fixer */
void fix_sex( CHAR_DATA *ch )
{
    if ( ch->sex < 0 || ch->sex > 2 )
        ch->sex = IS_NPC( ch ) ? 0 : ch->pcdata->true_sex;
}

void act_new( const char *format, CHAR_DATA *ch, const void *arg1,
              const void *arg2, int type, int min_pos )
{
    static const char      *he_she[] = { "it", "he", "she" };
    static const char      *him_her[] = { "it", "him", "her" };
    static const char      *his_her[] = { "its", "his", "her" };

    char                    buf[MAX_STRING_LENGTH];
    char                    fname[MAX_INPUT_LENGTH];
    CHAR_DATA              *to;
    const CHAR_DATA        *vch = ( const CHAR_DATA * ) arg2;
    const OBJ_DATA         *obj1 = ( const OBJ_DATA * ) arg1;
    const OBJ_DATA         *obj2 = ( const OBJ_DATA * ) arg2;
    const char             *str;
    const char             *i;
    char                   *point;

    /*
     * Discard null and zero-length messages.
     */
    if ( format == NULL || format[0] == '\0' )
        return;

    /*
     * discard null rooms and chars 
     */
    if ( ch == NULL || ch->in_room == NULL )
        return;

    to = ch->in_room->people;
    if ( type == TO_VICT )
    {
        if ( vch == NULL )
        {
            bug( "Act: null vch with TO_VICT.", 0 );
            return;
        }

        if ( vch->in_room == NULL )
            return;

        to = vch->in_room->people;
    }

    for ( ; to != NULL; to = to->next_in_room )
    {
        if ( to->desc == NULL || to->position < min_pos )
            continue;

        if ( ( type == TO_CHAR ) && to != ch )
            continue;
        if ( type == TO_VICT && ( to != vch || to == ch ) )
            continue;
        if ( type == TO_ROOM && to == ch )
            continue;
        if ( type == TO_NOTVICT && ( to == ch || to == vch ) )
            continue;

        point = buf;
        str = format;
        while ( *str != '\0' )
        {
            if ( *str != '$' )
            {
                *point++ = *str++;
                continue;
            }
            ++str;

            if ( arg2 == NULL && *str >= 'A' && *str <= 'Z' )
            {
                bug( "Act: missing arg2 for code %d.", *str );
                i = " <@@@> ";
            }
            else
            {
                switch ( *str )
                {
                    default:
                        bug( "Act: bad code %d.", *str );
                        i = " <@@@> ";
                        break;
                        /*
                         * Thx alex for 't' idea 
                         */
                    case 't':
                        i = ( const char * ) arg1;
                        break;
                    case 'T':
                        i = ( const char * ) arg2;
                        break;
                    case 'n':
                        i = PERS( ch, to );
                        break;
                    case 'N':
                        i = PERS( vch, to );
                        break;
                    case 'e':
                        i = he_she[URANGE( 0, ch->sex, 2 )];
                        break;
                    case 'E':
                        i = he_she[URANGE( 0, vch->sex, 2 )];
                        break;
                    case 'm':
                        i = him_her[URANGE( 0, ch->sex, 2 )];
                        break;
                    case 'M':
                        i = him_her[URANGE( 0, vch->sex, 2 )];
                        break;
                    case 's':
                        i = his_her[URANGE( 0, ch->sex, 2 )];
                        break;
                    case 'S':
                        i = his_her[URANGE( 0, vch->sex, 2 )];
                        break;

                    case 'p':
                        i = can_see_obj( to, obj1 ) ? obj1->short_descr : "something";
                        break;

                    case 'P':
                        i = can_see_obj( to, obj2 ) ? obj2->short_descr : "something";
                        break;

                    case 'd':
                        if ( arg2 == NULL || ( ( const char * ) arg2 )[0] == '\0' )
                        {
                            i = "door";
                        }
                        else
                        {
                            one_argument( ( const char * ) arg2, fname );
                            i = fname;
                        }
                        break;
                }
            }

            ++str;
            while ( ( *point = *i ) != '\0' )
                ++point, ++i;
        }

        *point++ = '\n';
        *point++ = '\r';
        buf[0] = UPPER( buf[0] );
        write_to_buffer( to->desc, buf, point - buf );
    }

    return;
}

/*
 * This function logs a last error message (if Str is not NULL)
 * and then calls exit with the code passed in.
 */
void proper_exit( int code, const char *Str, ... )
{
    va_list                 arg;
    char                    buf[MAX_STRING_LENGTH] = "\0\0\0";
    char                   *strtime = NULL;

    if ( Str && *Str )
    {
        strtime = ctime( &current_time );
        strtime[strlen( strtime ) - 1] = '\0';

        if ( fpArea != NULL )
        {
            int                     iLine;
            int                     iChar;

            if ( fpArea == stdin )
            {
                iLine = 0;
            }
            else
            {
                iChar = ftell( fpArea );
                fseek( fpArea, 0, 0 );
                for ( iLine = 0; ftell( fpArea ) < iChar; iLine++ )
                {
                    int                     c = 0;

                    while ( ( c = getc( fpArea ) ) != '\n' && c != EOF )
                        ;
                }
                fseek( fpArea, iChar, 0 );
            }

            sprintf( buf, "%s :: [*****] FILE: %s LINE: %d\n", strtime, strArea, iLine );
        }

        va_start( arg, Str );
        sprintf( buf + strlen( buf ), "%s :: ", strtime );
        vsprintf( buf + strlen( buf ), Str, arg );
        strcat( buf, "\n" );
        va_end( arg );
        log_string( buf );
    }
    exit( code );
}

/*
 * Signal handler for game shutdown.
 * Might want to call do_shutdown() or a subset of it.
 */
void shutdown_request( int a )
{
    char                    buf[MAX_STRING_LENGTH];
    DESCRIPTOR_DATA        *d,
                           *d_next;
    CHAR_DATA              *vch;

    sprintf( buf, "Shutdown by %s.", "SYSTEM -- Received SIGINT or SIGTERM" );
    append_file( NULL, SHUTDOWN_FILE, buf );
    strcat( buf, "\n\r" );
    merc_down = TRUE;
    for ( d = descriptor_list; d != NULL; d = d_next )
    {
        d_next = d->next;
        write_to_descriptor( d->descriptor, buf, 0 );
        vch = d->original ? d->original : d->character;
        if ( vch != NULL )
            save_char_obj( vch );
        close_socket( d );
    }
    return;
}