dbck-cache.c 30.9 KB
Newer Older
Linus Tolke Y's avatar
Linus Tolke Y committed
1
/*
2
 * $Id: dbck-cache.c,v 0.26 1996/07/27 11:21:14 byers Exp $
Per Cederqvist's avatar
Per Cederqvist committed
3
 * Copyright (C) 1991, 1992, 1993, 1994, 1995  Lysator Academic Computer Association.
Linus Tolke Y's avatar
Linus Tolke Y committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
 *
 * This file is part of the LysKOM server.
 * 
 * LysKOM 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 1, or (at your option) 
 * any later version.
 * 
 * LysKOM 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 LysKOM; see the file COPYING.  If not, write to
 * Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
 * or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
 * MA 02139, USA.
 *
 * Please mail bug reports to bug-lyskom@lysator.liu.se. 
 */
Per Cederqvist's avatar
Per Cederqvist committed
25 26 27 28 29 30 31 32 33 34
/*
 * This module contains some very simple simulations of the routines in
 * cache.c.
 *
 * Extracted from ram-cache.c and rewritten by ceder.
 *
 * New database format with texts in their own file by Inge Wallin.
 *   Also save time as a time_t instead of a struct tm.
 */

35
static char *rcsid = "$Id: dbck-cache.c,v 0.26 1996/07/27 11:21:14 byers Exp $";
36 37
#include "rcs.h"
USE(rcsid);
Per Cederqvist's avatar
Per Cederqvist committed
38

Per Cederqvist's avatar
Per Cederqvist committed
39
#include <stdio.h>
Per Cederqvist's avatar
Per Cederqvist committed
40
#ifndef SEEK_END
Per Cederqvist's avatar
Per Cederqvist committed
41
#  include <fcntl.h>
Per Cederqvist's avatar
Per Cederqvist committed
42 43
#endif
#ifndef SEEK_END
Per Cederqvist's avatar
Per Cederqvist committed
44 45 46 47 48
#  include <unistd.h>
#endif
#ifndef SEEK_END
#  define SEEK_SET 0
#  define SEEK_END 2
Per Cederqvist's avatar
Per Cederqvist committed
49
#endif
Per Cederqvist's avatar
Per Cederqvist committed
50 51 52
#ifdef HAVE_STDLIB_H
#  include <stdlib.h>
#endif
Per Cederqvist's avatar
Per Cederqvist committed
53
#include <time.h>
Per Cederqvist's avatar
Per Cederqvist committed
54
#include <sys/types.h>
Per Cederqvist's avatar
Per Cederqvist committed
55 56 57
#ifdef TIME_SYNC
#  include <sys/resource.h>
#endif
58 59 60
#ifdef HAVE_STDARG_H
#  include <stdarg.h>
#endif
Per Cederqvist's avatar
Per Cederqvist committed
61

62
#include "ldifftime.h"
Per Cederqvist's avatar
Per Cederqvist committed
63 64
#include "exp.h"
#include "misc-types.h"
65
#include "s-string.h"
Per Cederqvist's avatar
Per Cederqvist committed
66 67
#include "kom-types.h"
#include "kom-errno.h"
Per Cederqvist's avatar
Per Cederqvist committed
68
#include "cache.h"
Per Cederqvist's avatar
Per Cederqvist committed
69 70 71 72
#include "tmp-limits.h"
#include "debug.h"
#include "server/smalloc.h"
#include "log.h"
Per Cederqvist's avatar
Per Cederqvist committed
73
#include "lyskomd.h"
Per Cederqvist's avatar
Per Cederqvist committed
74
#include "kom-memory.h"
Per Cederqvist's avatar
Per Cederqvist committed
75 76
#include "ram-parse.h"
#include "ram-output.h"
Per Cederqvist's avatar
Per Cederqvist committed
77
#include "param.h"
Per Cederqvist's avatar
Per Cederqvist committed
78

Per Cederqvist's avatar
Per Cederqvist committed
79 80 81 82
/*
 * All functions that can fail sets kom_errno to a suitable value
 * if they fail.
 */
Per Cederqvist's avatar
Per Cederqvist committed
83 84 85 86 87 88 89 90 91 92 93

Person		* pers_arr[ MAX_CONF ];
Conference 	* conf_arr[ MAX_CONF ];
Conf_type	  conf_type_arr[ MAX_CONF ];
String		  name_list [ MAX_CONF ]; /* "cache" list */
			        	  /* Global var auto init to NULL */
int		  next_free_num = 1;

Text_stat 	* text_arr[ MAX_TEXT ];
int next_text_num = 1;

David Byers's avatar
David Byers committed
94 95 96 97 98 99 100 101 102 103 104 105
Info		  kom_info =
{
#include "version.incl"
    ,				/* version */
    1,				/* conf_pres_conf */
    2,				/* pers_pres_conf */
    3,				/* motd_conf */
    4,				/* kom_news_conf */
    0				/* motd_of_lyskom */
};


Per Cederqvist's avatar
Per Cederqvist committed
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
/* Defined in ramkomd.c */

static FILE          *text_file = NULL;
static FILE	     *new_text_file = NULL; /* Used when garbage collecting. */

BUGDECL;


/* Macros */

#define TRACE2(format, arg) if ( buglevel > 2 ) printf(format, arg)
#define TRACE1(format) if ( buglevel > 2 ) printf(format)
#define TRACESTR(str)  if ( buglevel > 2 ) s_puts(str)
#define INRANGE(str, num, retval) if ( num == 0 || num >= next_free_num ) \
{			\
    return retval;	\
    printf("%s: conf_no %d out of range 1 ... %d ", str, num, next_free_num); \
    fflush(stdout);	\
    fflush(stderr);	\
    abort();		\
}

#define TEXT_RANGE(str, num, retval) if ( num == 0 || num >= next_text_num ) \
{	\
    return retval;\
    printf("Text_no out of range 1 ... %d ", next_text_num); \
    printf(str);	\
    fflush(stdout);	\
    fflush(stderr);	\
    abort(); 		\
}

Per Cederqvist's avatar
Per Cederqvist committed
138 139 140 141 142 143 144 145 146 147
#define VOID_TEXT_RANGE(str, num) if ( num == 0 || num >= next_text_num ) \
{	\
    return;\
    printf("Text_no out of range 1 ... %d ", next_text_num); \
    printf(str);	\
    fflush(stdout);	\
    fflush(stderr);	\
    abort(); 		\
}

Per Cederqvist's avatar
Per Cederqvist committed
148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181

extern Conf_type
cached_get_conf_type (Conf_no conf_no)
{
    return conf_arr [ conf_no ]->type;
}



#define IMPL(retval) if (1) { fflush(stderr); fflush(stdout); abort(); }


/*
 * Various function calls to tell the cache that something is changed.
 */

void
mark_person_as_changed(Pers_no	pers_no)
{
    TRACE2("Person %d is changed\n", pers_no);
    return;    
}


void
mark_conference_as_changed(Conf_no	conf_no)
{
    TRACE2("Conf.  %d is changed\n", conf_no);
    return;
}

void
mark_text_as_changed( Text_no text_no )
{
182
    TRACE2("Text %lu is changed.\n", text_no);
Per Cederqvist's avatar
Per Cederqvist committed
183
    VOID_TEXT_RANGE("mark_text_as_changed\n", text_no);
Per Cederqvist's avatar
Per Cederqvist committed
184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329
}    


/*
 * Person-related calls
 */


extern Success
cached_create_person( Pers_no person )
{
    TRACE2("Person %d is being created.\n", person);
    INRANGE("cached_create_person\n", person, FAILURE);

    if ( pers_arr[ person ] != NULL )
    {
	TRACE1("pers_arr not NULL");
	fflush(stdout);
	fflush(stderr);
	abort();
    }
    
    pers_arr[ person ] = alloc_person();
    return OK;
}


extern Person *
cached_get_person_stat( Pers_no	person )
{
    INRANGE("cached_get_person_stat\n", person, NULL);
    TRACE2("cached_get_person_stat %d\n", person);
    kom_errno = KOM_UNDEF_PERS;
    
    return pers_arr[ person ];
}



/*
 * Conference-related calls
 */
extern Conf_no	/* Also cache the name */
cached_create_conf (String  name)
{
    Conference * conf_c;
    Conf_no	 conf_no;

    TRACE1("cached_create_conf( ");
    TRACESTR(name);
    TRACE1(" )\n");

    if ( next_free_num >= MAX_CONF )
    {
	kom_errno = KOM_INDEX_OUT_OF_RANGE;
	return 0;
    }
    
    conf_no = next_free_num++;
    conf_c  = alloc_conference();

    conf_c->name = EMPTY_STRING;
    s_strcpy(&conf_c->name, name);

    TRACE2(" number %d\n", conf_no);

    conf_arr[ conf_no ] = conf_c;
    pers_arr[ conf_no ] = NULL;
    
    return conf_no;
}

extern Success
cached_delete_conf( Conf_no	conf )
{
    INRANGE("cached_delete_conf()", conf, FAILURE);
    if ( conf_arr[ conf ] == NULL )
    {
	kom_errno = KOM_UNDEF_CONF;
	return FAILURE;
    }
    free_conference(conf_arr[ conf ]);
    conf_arr[ conf ] = NULL;
    return OK;
}

Success
cached_delete_person(Pers_no pers)
{
    INRANGE("cached_delete_person()", pers, FAILURE);
    if ( pers_arr[ pers ] == NULL )
    {
	kom_errno = KOM_UNDEF_PERS;
	return FAILURE;
    }

    pers_arr[ pers ] = NULL;
    return OK;
}

Success
cached_delete_text(Text_no text)
{
    TEXT_RANGE("cached_delete_text()", text, FAILURE);
    if ( text_arr[ text ] == NULL )
    {
	kom_errno = KOM_NO_SUCH_TEXT;
	return FAILURE;
    }
    free_text_stat(text_arr[ text ]);
    text_arr[ text ] = NULL;
    return OK;
    
}


extern Conference *
cached_get_conf_stat(	Conf_no		conf_no )
{
    INRANGE("cached_get_conf_stat\n", conf_no, NULL);
    TRACE2("cached_get_conf_stat %d\n", conf_no);
    kom_errno = KOM_UNDEF_CONF;
    
    return conf_arr[ conf_no ];
}

/*
 * Return TRUE if conf_no exists.
 */
Bool
cached_conf_exists(Conf_no conf_no)
{
    return conf_arr[ conf_no ] != NULL ? TRUE : FALSE;
}

    
/*
 * Calls to handle texts
 */

extern String
cached_get_text( Text_no text )
{
    String  the_string;

    TEXT_RANGE("cached_get_text\n", text, EMPTY_STRING);
330
    TRACE2("cached_get_text %lu\n", text);
Per Cederqvist's avatar
Per Cederqvist committed
331 332 333 334 335 336 337 338 339 340 341

    if ( text_arr[ text ] == NULL )
	return EMPTY_STRING;
    else
    {
	the_string.string = tmp_alloc( text_arr[text]->no_of_chars );
	the_string.len = text_arr[text]->no_of_chars;
	fseek(text_file, text_arr[ text ]->file_pos, SEEK_SET);
	if ( fread(the_string.string, sizeof(char), the_string.len, text_file)
	    != the_string.len )
	{
Per Cederqvist's avatar
Per Cederqvist committed
342 343
	    log("%s read enough characters of text %d\n",
		"WARNING: cached_get_text: couldn't",
Per Cederqvist's avatar
Per Cederqvist committed
344 345 346 347 348 349 350 351 352 353 354 355
		text);
	}
		    
	return the_string;
    }
}

extern Text_stat *	/* NULL on error */
cached_get_text_stat(	Text_no		text )
{
    kom_errno = KOM_NO_SUCH_TEXT;
    TEXT_RANGE("cached_get_text_stat\n", text, NULL);
356
    TRACE2("cached_get_text_stat %lu\n", text);
Per Cederqvist's avatar
Per Cederqvist committed
357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
    
    return text_arr[ text ];
}



/*
 * The text is set up with an empty misc-field. The misc field is
 * later initialized by create_text.
 */

#if 0
extern Text_no
cached_create_text( String message)
{
    Text_no tno;

    tno = next_text_num++;

    TRACE2("cached_create_text (len=%d)\n", message.len);

    if ( tno >= MAX_TEXT )
    {
	kom_errno = KOM_INDEX_OUT_OF_RANGE;
	next_text_num = MAX_TEXT;
	
	return 0;
    }
        
    text_arr[ tno ] = alloc_text_stat();
    text_arr[ tno ]->no_of_misc = 0;
    text_arr[ tno ]->misc_items = NULL;
    text_arr[ tno ]->no_of_marks = 0;
    text_arr[ tno ]->no_of_lines = 0;
    text_arr[ tno ]->no_of_chars = 0;
    fseek(text_file, 0, SEEK_END);
    text_arr[ tno ]->file_pos = ftell(text_file);

    if ( fwrite(message.string, sizeof(char), message.len, text_file)
	!= message.len ) {
	log("WARNING: cached_create_text: Couldn't write the text %d\n",
	    tno);
    }

    fflush(text_file);
    
    TRACE2("cached_create_text -> %d\n", tno);
    
    return tno;
}
#endif

Per Cederqvist's avatar
Per Cederqvist committed
409
void
Per Cederqvist's avatar
Per Cederqvist committed
410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499
cached_flush_text(Text_no text_no,
		  String message)
{
    if ( text_no >= next_text_num )
    {
	log("cached_flush_text(%lu, string): only text %lu exists.",
	    (u_long) text_no, (u_long) next_text_num);
	return;
    }
        
    fseek(new_text_file, 0, SEEK_END);
    text_arr[ text_no ]->file_pos = ftell(new_text_file);

    if ( fwrite(message.string, sizeof(char), message.len, new_text_file)
	!= message.len )
    {
	log("WARNING: cached_flush_text: Couldn't write the text %d\n",
	    text_no);
    }

    fflush(new_text_file);
}

Text_no
traverse_text(Text_no seed)
{
    seed++;
    
    while ( seed < next_text_num && text_arr[ seed ] == NULL )
	seed++;

    return (seed == next_text_num) ? 0 : seed ;
}

Pers_no
traverse_person(Pers_no seed)
{
    seed++;
    
    while ( seed < next_free_num && pers_arr[ seed ] == NULL )
	seed++;

    return (seed == next_free_num) ? 0 : seed ;
}

Conf_no
traverse_conference(Conf_no seed)
{
    seed++;
    
    while ( seed < next_free_num && conf_arr[ seed ] == NULL )
	seed++;

    return (seed == next_free_num) ? 0 : seed ;
}

extern Garb_nice
cached_get_garb_nice (Conf_no conf_no)
{
    return conf_arr [ conf_no ]->nice;
}

extern Local_text_no
cached_get_highest_local_no (Conf_no conf_no)
{
    return ( conf_arr [ conf_no ]->texts.first_local_no
	    - 1 + conf_arr [ conf_no ]->texts.no_of_texts );
}

/* Lock a person struct in memory. Increase a referenc count. */
void
cached_lock_person(Pers_no pers_no)
{}

/* Decrease reference count. If zero, unlock person. */
void
cached_unlock_person(Pers_no pers_no)
{}

/* Lock a conf struct in memory. Increase a referenc count. */
void
cached_lock_conf(Conf_no conf_no)
{}

/* Decrease reference count. If zero, unlock conf. */
void
cached_unlock_conf(Conf_no conf_no)
{}


David Byers's avatar
David Byers committed
500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520
static long
get_version(const char *fn)
{
    FILE	 *fp;
    char	  c;
    long	  version;
    
    if ( (fp = fopen(fn, "rb")) == NULL)
	return -1;

    fseek(fp, 5, SEEK_SET);
    if ( (c = getc(fp)) == '\n')
    {
	fclose(fp);
	return 0;
    }
    version = fparse_long(fp);
    fclose(fp);

    return version;
}
Per Cederqvist's avatar
Per Cederqvist committed
521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557


static Bool
is_clean(const char *fn)
{
    FILE *fp;

    if ( (fp = fopen(fn, "rb")) == NULL )
	return FALSE;

    if ( getc(fp) == 'C' && getc(fp) == 'L' && getc(fp) == 'E'
	&& getc(fp) == 'A' && getc(fp) == 'N' )
    {
	fclose(fp);
	return TRUE;
    }
    else
    {
	fclose(fp);
	return FALSE;
    }
}

#ifdef TIME_SYNC
static long
timerdiff(struct timeval a,
	   struct timeval b)
{
    return a.tv_sec - b.tv_sec;
}
#endif

extern void			/* Write out everything. */
cache_sync(void)
{
    FILE *fp;
    int i;
David Byers's avatar
David Byers committed
558
    extern long oformat;
Per Cederqvist's avatar
Per Cederqvist committed
559 560 561 562 563 564 565 566 567 568 569 570 571

#ifdef TIME_SYNC
    struct rusage start, after_confs, after_persons, after_text_stats,
    	after_text_masses;
    time_t st, ac, ap, ats, atm;
    void getrusage(int who, struct rusage *rusage);
#endif
    
#ifdef TIME_SYNC
    getrusage(0, &start);
    time(&st);
#endif

Per Cederqvist's avatar
Per Cederqvist committed
572
    if ( is_clean(param.datafile_name) )
Per Cederqvist's avatar
Per Cederqvist committed
573
    {
Per Cederqvist's avatar
Per Cederqvist committed
574
	if ( rename(param.datafile_name, param.backupfile_name) != 0 )
Per Cederqvist's avatar
Per Cederqvist committed
575 576 577 578 579
	    log("WARNING: cache_sync: can't backup.\n");
    }
    else
	log("cache_sync: datafile not clean. No backup taken.\n");
    
Per Cederqvist's avatar
Per Cederqvist committed
580
    if ( (fp=fopen(param.datafile_name, "w") ) == NULL )
Per Cederqvist's avatar
Per Cederqvist committed
581 582 583 584 585
    {
	log("WARNING: cache_sync: can't open file to save in.\n");
	return;
    }

586 587 588
    /*
     * Print file header and other things that go before the conferences.
     */
Per Cederqvist's avatar
Per Cederqvist committed
589

590 591 592 593
    switch (oformat)
    {
    case 0:
	fprintf(fp, "DIRTY\n");		 /* DIRTY-FLAG */
David Byers's avatar
David Byers committed
594
	fprintf(fp, "%d\n", next_free_num);	  /* NEXT_FREE_NUM */
595 596 597
        break;
    case 1:
	fprintf(fp, "DIRTY:%05ld\n", oformat);
David Byers's avatar
David Byers committed
598 599
	fprintf(fp, "#C %d\n", next_free_num);
	fprintf(fp, "#T %d\n", next_text_num);
600 601 602 603 604 605 606 607 608 609 610
        fprintf(fp, "I %d %d %d %d %ld\n",
                kom_info.conf_pres_conf,
                kom_info.pers_pres_conf,
                kom_info.motd_conf,
                kom_info.kom_news_conf,
                kom_info.motd_of_lyskom);
        break;
    default:
        restart_kom("Unknown output file format: %d\n", oformat);
    }
    
Per Cederqvist's avatar
Per Cederqvist committed
611 612
    for ( i = 1; i < next_free_num; i++ ) /* CONFS */
    {
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
        switch (oformat)
        {
        case 0:
            if ( conf_arr[ i ] == NULL)
                fprintf(fp, "@");
            else
            {
                fprintf(fp, "+ ");
                foutput_conference_0(fp, conf_arr[ i ]);
            }
            putc('\n', fp);
            break;
        case 1:
            if ( conf_arr[ i ] != NULL )
            {
                fprintf(fp, "C %d", i);
                foutput_conference(fp, conf_arr[ i ]);
                putc('\n', fp);
            }
            break;

        default:
            restart_kom("Bad output file format: %d\n", oformat);
        }
Per Cederqvist's avatar
Per Cederqvist committed
637 638 639 640 641 642 643
    }
#ifdef TIME_SYNC
    getrusage(0, &after_confs);
    time(&ac);
#endif
    for ( i = 1; i < next_free_num; i++ ) /* PERSONS */
    {
644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
        switch (oformat)
        {
        case 0:
            if ( pers_arr[ i ] == NULL)
                fprintf(fp, "@");
            else
            {
                fprintf(fp, "+ ");
                fprintf(fp, "%dH", PASSWD_LEN);
                fwrite(pers_arr[i]->pwd, PASSWD_LEN, 1, fp);
                foutput_person(fp, pers_arr[ i ]);
            }
            putc('\n', fp);
            break;
        case 1:
            if ( pers_arr[ i ] != NULL )
            {
                fprintf(fp, "P %d", i);
                fprintf(fp, " %dH", PASSWD_LEN);
                fwrite(pers_arr[i]->pwd, PASSWD_LEN, 1, fp);
                foutput_person(fp, pers_arr[ i ]);
                putc('\n', fp);
            }
            break;

        default:
            restart_kom("Bad output file format: %d\n", oformat);
        }
Per Cederqvist's avatar
Per Cederqvist committed
672 673 674 675 676 677
    }
#ifdef TIME_SYNC
    getrusage(0, &after_persons);
    time(&ap);
#endif

678 679 680 681 682 683 684
    /*
     * Print things that go between persons and texts
     */

    switch (oformat)
    {
    case 0:
David Byers's avatar
David Byers committed
685
	fprintf(fp, "%d\n", next_text_num);	/* NEXT_TEXT_NUM */
686 687 688 689 690 691 692
        break;
    case 1:
        break;
    default:
        restart_kom("Unknown output file format: %d\n", oformat);
    }
    
Per Cederqvist's avatar
Per Cederqvist committed
693 694 695

    for ( i = 1; i < next_text_num; i++ ) /* TEXT_STATS */
    {
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
        switch (oformat)
        {
        case 0:
            if ( text_arr[ i ] == NULL )
                fprintf(fp, "@");
            else
            {
                fprintf(fp, "+ ");
                foutput_text_stat(fp, text_arr[ i ]);
            }
            putc('\n', fp);
            break;
        case 1:
            if ( text_arr[ i ] != NULL )
            {
                fprintf(fp, "T %d", i);
                foutput_text_stat(fp, text_arr[ i ]);
                putc('\n', fp);
            }
            break;
        default:
            restart_kom("Unknown output file format: %d\n", oformat);
                
        }
Per Cederqvist's avatar
Per Cederqvist committed
720 721
    }

722 723 724 725 726 727 728 729 730
    /*
     * Print file footer
     *
     * Ho-hum. I thought there was supposed to be a newline at the end
     * of a version zero file, but it seems I was wrong, so this code
     * basically does...absolutely nothing.
     */

    switch (oformat)
David Byers's avatar
David Byers committed
731
    {
732 733 734 735 736 737
    case 0:
        break;
    case 1:
        break;
    default:
        restart_kom("Unknown output file format: %d\n", oformat);
David Byers's avatar
David Byers committed
738 739
    }
    
Per Cederqvist's avatar
Per Cederqvist committed
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
#ifdef TIME_SYNC
    getrusage(0, &after_text_stats);
    time(&ats);

    getrusage(0, &after_text_masses);
    time(&atm);
#endif

    rewind(fp);
    fprintf(fp, "CLEAN");
    fclose(fp);

#ifdef TIME_SYNC
    log("Sync ready.\n"
    	"User: %4ld sec (%4ld conf, %4ld pers, %4ld stat, %4ld text)\n"
    	"Sys:  %4ld sec (%4ld conf, %4ld pers, %4ld stat, %4ld text)\n"
	"Real: %4ld sec (%4ld conf, %4ld pers, %4ld stat, %4ld text)\n"
	"Page faults: %4ld. Swapped: %4ld. Outblocked: %4ld.\n",
	
	timerdiff(after_text_masses.ru_utime, start.ru_utime),
	timerdiff(after_confs.ru_utime, start.ru_utime),
	timerdiff(after_persons.ru_utime, after_confs.ru_utime),
	timerdiff(after_text_stats.ru_utime, after_persons.ru_utime),
	timerdiff(after_text_masses.ru_utime, after_text_stats.ru_utime),
	
	timerdiff(after_text_masses.ru_stime, start.ru_stime),
	timerdiff(after_confs.ru_stime, start.ru_stime),
	timerdiff(after_persons.ru_stime, after_confs.ru_stime),
	timerdiff(after_text_stats.ru_stime, after_persons.ru_stime),
	timerdiff(after_text_masses.ru_stime, after_text_stats.ru_stime),

771 772 773 774 775
	(u_long)ldifftime(atm, st),
	(u_long)ldifftime(ac, st),
	(u_long)ldifftime(ap, ac),
	(u_long)ldifftime(ats, ap),
	(u_long)ldifftime(atm, ats),
Per Cederqvist's avatar
Per Cederqvist committed
776 777 778 779 780 781 782

	after_text_masses.ru_majflt - start.ru_majflt,
	after_text_masses.ru_nswap - start.ru_nswap,
	after_text_masses.ru_oublock - start.ru_oublock);
#endif    
}

Per Cederqvist's avatar
Per Cederqvist committed
783
void
Per Cederqvist's avatar
Per Cederqvist committed
784 785
cache_open_new_text_file(void)
{
Per Cederqvist's avatar
Per Cederqvist committed
786
    if ( ( new_text_file = fopen(param.textfile_name, "w")) == NULL )
Per Cederqvist's avatar
Per Cederqvist committed
787 788 789 790 791 792 793 794 795 796
    {
	log("Can't open file to save new texts. Goodbye.\n");
	exit(1);
    }
}

extern Success
init_cache(void)
{
    FILE *fp = NULL;
797
    unsigned long i;
Per Cederqvist's avatar
Per Cederqvist committed
798
    extern int vflag;		/* from dbck.c */
799
    extern Bool truncated_texts; /* from dbck.c */
David Byers's avatar
David Byers committed
800 801
    long num;
    long data_file_version;
802
    char done, read_text_num, read_conf_num, c;
803 804 805 806 807 808 809 810 811 812 813
    extern int modifications;
    extern long oformat;
    extern int pers_pres_conf;
    extern int conf_pres_conf;
    extern int motd_conf;
    extern int motd_of_lyskom;
    extern int kom_news_conf;
       
    read_text_num = 0;
    read_conf_num = 0;
        
David Byers's avatar
David Byers committed
814 815 816 817 818 819 820 821
    for (i = 0; i < MAX_CONF; i++)
	conf_arr[i] = NULL;
    for (i = 0; i < MAX_CONF; i++)
	pers_arr[i] = NULL;
    for (i = 0; i < MAX_TEXT; i++)
	text_arr[i] = NULL;
    
    
Per Cederqvist's avatar
Per Cederqvist committed
822 823
    new_text_file = NULL;
    
Per Cederqvist's avatar
Per Cederqvist committed
824
    if ( (text_file = fopen(param.textfile_name, "rb")) == NULL )
Per Cederqvist's avatar
Per Cederqvist committed
825
    {
Per Cederqvist's avatar
Per Cederqvist committed
826
	perror(param.textfile_name);
827
	restart_kom("ERROR: init_cache: can't open text file %s.\n",
Per Cederqvist's avatar
Per Cederqvist committed
828
		    param.textfile_name);
Per Cederqvist's avatar
Per Cederqvist committed
829 830
    }

Per Cederqvist's avatar
Per Cederqvist committed
831
    if ( is_clean(param.datafile_name) )
Per Cederqvist's avatar
Per Cederqvist committed
832
    {
David Byers's avatar
David Byers committed
833
	data_file_version = get_version(param.datafile_name);
Per Cederqvist's avatar
Per Cederqvist committed
834
	if ( (fp = fopen(param.datafile_name, "rb")) == NULL )
Per Cederqvist's avatar
Per Cederqvist committed
835 836 837 838 839 840
	{
	    log("WARNING: init_cache: can't open datafile.\n");
	    return FAILURE;
	}
	log("MSG: init_cache: using datafile.\n");
    }
Per Cederqvist's avatar
Per Cederqvist committed
841
    else if ( is_clean(param.backupfile_name) )
Per Cederqvist's avatar
Per Cederqvist committed
842
    {
David Byers's avatar
David Byers committed
843
	data_file_version = get_version(param.backupfile_name);
Per Cederqvist's avatar
Per Cederqvist committed
844
	if ( (fp = fopen(param.backupfile_name, "rb")) == NULL )
Per Cederqvist's avatar
Per Cederqvist committed
845 846 847 848 849 850 851 852 853 854 855 856
	{
	    log("WARNING: init_cache: can't open backupfile.\n");
	    return FAILURE;
	}
	log("MSG: init_cache: using backup file.\n");
    }
    else
    {
	log("WARNING: init_cache: can't find old data base.\n");
	return FAILURE;
    }

857 858 859 860
    /*
     * If no output format has been selected, use the input format
     */

861 862 863
    if (oformat == -1)
        oformat = data_file_version;

864 865 866
    /*
     * Read file header
     */
David Byers's avatar
David Byers committed
867

868 869 870 871
    switch (data_file_version)
    {
    case 0:
	fseek(fp, 6, SEEK_SET);	/* skip clean/dirty flag. */
David Byers's avatar
David Byers committed
872 873
	next_free_num = fparse_long(fp);	  /* NEXT_FREE_NUM */
	read_conf_num = 1;
874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
        if (vflag)
        {
            log("Data file version is '%c'\n", data_file_version);
            log("Reading %d conferences, starting at pos %d.\n",
                next_free_num-1, ftell(fp));
        }
        break;
    case 1:
	fseek(fp, 12, SEEK_SET);
        if (vflag)
            log("Data file version is '%c'\n", data_file_version);
        break;
    default:
        restart_kom("Unknown input file format: %d\n", data_file_version);
    }
David Byers's avatar
David Byers committed
889 890
    
    done = 0;
891 892 893 894 895 896 897

    /*
     * Loop over records in the database. For a version zero database,
     * loop next_free_num times and for a version one database, loop
     * until the end of the file or until done is set
     */
    
David Byers's avatar
David Byers committed
898
    for ( i = 1;
899 900 901
          (data_file_version == 0 && i < next_free_num && !feof(fp)) ||
          (data_file_version == 1 && !done);
          i++ )
Per Cederqvist's avatar
Per Cederqvist committed
902
    {
David Byers's avatar
David Byers committed
903
	num = i;
Per Cederqvist's avatar
Per Cederqvist committed
904
	fskipwhite(fp);
David Byers's avatar
David Byers committed
905

906 907 908 909
	switch(c = getc(fp))
	{
        case EOF:
            switch (data_file_version)
910
            {
911 912 913 914 915 916 917 918 919 920 921 922 923
            case 0:
                restart_kom("Unexpected end-of-file reading conferences "
                            "in data file version %d.",
                            data_file_version);
                break;

            case 1:
                done = 1;
                break;

            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
924
            }
925 926 927 928
            break;
            
	case '@':
            switch (data_file_version)
929
            {
930 931 932 933 934 935 936 937 938 939
            case 0:
                conf_arr[num] = NULL;
                break;
            case 1:
		restart_kom("@ record in data file version %d at %d.\n",
                            data_file_version, ftell(fp));
                break;
            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
940
            }
941 942 943 944
            break;

	case 'I':
            switch (data_file_version)
945
            {
946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990
            case 0:
                restart_kom("I record in data file version %d at %d.\n",
                            data_file_version, ftell(fp));
                break;
            case 1:
                kom_info.conf_pres_conf = fparse_long(fp);
                kom_info.pers_pres_conf = fparse_long(fp);
                kom_info.motd_conf = fparse_long(fp);
                kom_info.kom_news_conf = fparse_long(fp);
                kom_info.motd_of_lyskom = fparse_long(fp);
                
                if (pers_pres_conf != -1)
                {
                    modifications += (kom_info.pers_pres_conf !=
                                      pers_pres_conf);
                    kom_info.pers_pres_conf = pers_pres_conf;
                }
                if (conf_pres_conf != -1)
                {
                    modifications += (kom_info.conf_pres_conf !=
                                      conf_pres_conf);
                    kom_info.conf_pres_conf = conf_pres_conf;
                }
                if (motd_conf != -1)
                {
                    modifications += (kom_info.motd_conf !=
                                      motd_conf);
                    kom_info.motd_conf = motd_conf;
                }
                if (kom_news_conf != -1)
                {
                    modifications += (kom_info.kom_news_conf !=
                                      kom_news_conf);
                    kom_info.kom_news_conf = kom_news_conf;
                }
                if (motd_of_lyskom != -1)
                {
                    modifications += (kom_info.motd_of_lyskom !=
                                      motd_of_lyskom);
                    kom_info.motd_of_lyskom = motd_of_lyskom;
                }
                break;
            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
991
            }
992
            break;
David Byers's avatar
David Byers committed
993 994
	    
	case 'C':
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017
            switch (data_file_version)
            {
            case 0:
                restart_kom("C record in data file version %d at %d.\n",
                            data_file_version, ftell(fp));
                break;

            case 1:
                num = fparse_long(fp);
                if (conf_arr[num])
                    free_conference(conf_arr[num]);
                conf_arr[num] = alloc_conference();
                if (fparse_conference(fp, conf_arr[num]) != OK)
                    restart_kom("init_cache(): %s. i == %d\n", 
                                "fparse_conference failed", i);
                name_list[num] = EMPTY_STRING;
                s_strcpy(&name_list[num], conf_arr[ num ]->name);
                break;

            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
            }
Per Cederqvist's avatar
Per Cederqvist committed
1018 1019
	    break;

David Byers's avatar
David Byers committed
1020
	case 'P':
1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041
            switch (data_file_version)
            {
            case 0:
                restart_kom("P record in data file version %d at %d.\n",
                            data_file_version, ftell(fp));
                break;

            case 1:
                num = fparse_long(fp);
                if (pers_arr[num])
                    free_person(pers_arr[num]);
                pers_arr[num] = alloc_person();
                if ( fparse_person(fp, pers_arr[ num ]) != OK )
                    restart_kom("init_cache: fparse_person failed. num == %d\n",
                                num);
                break;

            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
            }
David Byers's avatar
David Byers committed
1042 1043 1044
	    break;
	    
	case 'T':
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
            switch (data_file_version)
            {
            case 0:
                restart_kom("T record in data file version %d at %d\n",
                            data_file_version, ftell(fp));
                break;

            case 1:
                num = fparse_long(fp);
                if (text_arr[num])
                    free_text_stat(text_arr[num]);
                text_arr[ num ] = alloc_text_stat();
                if ( fparse_text_stat(fp, text_arr[ num ]) != OK )
                {
                    /* Simply ignore everything else.  The cause of this
                       error might be that the file has been truncated (maybe
                       due to an overfull disk). */
                    log("init_cache(): fparse_text_stat failed "
                        "for text %d.\n%s",
                        num, "Everything remaining is lost.\n");
                    next_text_num = i;
                    read_text_num = 1;
                    truncated_texts = TRUE;
                    done = 1;
                }
                break;

            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
            }
David Byers's avatar
David Byers committed
1076 1077
	    break;	
    
Per Cederqvist's avatar
Per Cederqvist committed
1078
	case '+':
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
            switch (data_file_version)
            {
            case 0:
                conf_arr[ i ] = alloc_conference();
                if ( fparse_conference(fp, conf_arr[ i ]) != OK )
                    restart_kom("init_cache(): %s. i == %d\n", 
                                "fparse_conference failed", i);
                name_list[i] = EMPTY_STRING;
                s_strcpy(&name_list[i], conf_arr[ i ]->name);
                break;
            case 1:
                restart_kom("+ record in data file version %d at %d.\n",
                            data_file_version, ftell(fp));
                break;
            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
            }
            break;
David Byers's avatar
David Byers committed
1098 1099

	case '#':
1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
            switch (data_file_version)
            {
            case 0:
                restart_kom("#record in data file version %d at %d.\n",
                            data_file_version);
                break;

            case 1:
                switch (c = getc(fp))
                {
                case 'C':
                    next_free_num = fparse_long(fp);
                    read_conf_num = 1;
                    break;
                case 'T':
                    next_text_num = fparse_long(fp);
                    read_text_num = 1;
                    break;
                default:
                    restart_kom("Unknown # record (#%c) in data "
                                "file version %d at %d.\n",
                                c, data_file_version, ftell(fp));
                }
                break;

            default:
                restart_kom("Unknown input file format: %d\n",
                            data_file_version);
David Byers's avatar
David Byers committed
1128 1129 1130 1131
	  }
	  break;

	case '-':
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
            switch (data_file_version)
            {
            case 0:
                restart_kom("- record in data file version %d at %d.\n",
                            data_file_version, ftell(fp));
                break;

            case 1:
                switch(c = getc(fp))
                {
                case 'C':
                    num = fparse_long(fp);
                    if (conf_arr[num] != NULL)
                        free_conference(conf_arr[num]);
                    conf_arr[num] = NULL;
                    break;
                case 'P':
                    num = fparse_long(fp);
                    if (pers_arr[num] != NULL)
                        free_person(pers_arr[num]);
                    pers_arr[num] = NULL;
                    break;
                case 'T':
                    num = fparse_long(fp);
                    if (text_arr[num] != NULL)
                        free_text_stat(text_arr[num]);
                    text_arr[num] = NULL;
                    break;
                default:
                    restart_kom("Unknown - record (%c) in data file "
                                "version %d at %d.\n",
                                c, data_file_version, ftell(fp));
                }
                break;

            default:
                restart_kom("Unknown input file format %d\n",
                            data_file_version);
            }
            break;
David Byers's avatar
David Byers committed
1172 1173

	default:
1174 1175
            restart_kom("Unknown record type in data file version %d at %d.\n",
                        data_file_version, ftell(fp));
Per Cederqvist's avatar
Per Cederqvist committed
1176 1177 1178
	}
    }

1179 1180 1181 1182
    /*
     * The rest is only for data file version 0
     */
    
Per Cederqvist's avatar
Per Cederqvist committed
1183

David Byers's avatar
David Byers committed
1184
    if (data_file_version == 0)
Per Cederqvist's avatar
Per Cederqvist committed
1185
    {
1186 1187 1188
        if ( vflag )
            log("Reading %d persons, starting at pos %d.\n",
                next_free_num-1, ftell(fp));
David Byers's avatar
David Byers committed
1189
	for ( i = 1; i < next_free_num; i++ ) /* PERSONS */
Per Cederqvist's avatar
Per Cederqvist committed
1190
	{
David Byers's avatar
David Byers committed
1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
	    fskipwhite(fp);
	    switch(getc(fp))
	    {
	    case '@':
		pers_arr[ i ] = NULL;
		break;

	    case '+':
		pers_arr[ i ] = alloc_person();
		if ( fparse_person(fp, pers_arr[ i ]) != OK )
		    restart_kom("init_cache: fparse_person failed. i == %d\n",
				i);
		break;
	    }
Per Cederqvist's avatar
Per Cederqvist committed
1205 1206
	}

David Byers's avatar
David Byers committed
1207 1208
	next_text_num = fparse_long(fp);	/* NEXT_TEXT_NUM */
	read_text_num = 1;
Per Cederqvist's avatar
Per Cederqvist committed
1209

David Byers's avatar
David Byers committed
1210 1211 1212
	if ( vflag )
	    log("Reading %d texts, starting at pos %d.\n",
		next_text_num-1, ftell(fp));
Per Cederqvist's avatar
Per Cederqvist committed
1213

David Byers's avatar
David Byers committed
1214
	for ( i = 1; i < next_text_num; i++ ) /* TEXT_STATS */
Per Cederqvist's avatar
Per Cederqvist committed
1215
	{
David Byers's avatar
David Byers committed
1216 1217
	    fskipwhite(fp);
	    switch(getc(fp))
1218
	    {
David Byers's avatar
David Byers committed
1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236
	    case '@':
		text_arr[ i ] = NULL;
		break;

	    case '+':
		text_arr[ i ] = alloc_text_stat();
		if ( fparse_text_stat(fp, text_arr[ i ]) != OK )
		{
		    /* Simply ignore the following texts.  The cause of this
		       error might be that the file has been truncated (maybe
		       due to an overfull disk). */

		    log("init_cache(): fparse_text_stat failed for text %d.\n%s",
			i, "All remaining texts are lost.\n");
		    next_text_num = i;
		    truncated_texts = TRUE;
		}
		break;
1237
	    }
Per Cederqvist's avatar
Per Cederqvist committed
1238
	}
David Byers's avatar
David Byers committed
1239
    } /* if (datafile_version == 0) */
Per Cederqvist's avatar
Per Cederqvist committed
1240 1241 1242 1243

    log("Read %d confs/persons and %d texts, eof at %d\n",
	next_free_num-1, next_text_num-1, ftell(fp));

David Byers's avatar
David Byers committed
1244 1245
    if (read_text_num == 0 || read_conf_num == 0)
      restart_kom("init_cache(): Failed to read next_conf or text num.\n");
Per Cederqvist's avatar
Per Cederqvist committed
1246 1247 1248 1249
    fclose(fp);

    return OK;
}