dbck.c 39.4 KB
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/*
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 * $Id: dbck.c,v 0.68 2002/09/06 22:42:42 ceder Exp $
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 * Copyright (C) 1991-2002  Lysator Academic Computer Association.
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 *
 * 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. 
 */
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/*
 * dbck.c - A simple database checker and corrector.
 *
 * Author: Per Cederqvist.
 */

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#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

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#ifdef HAVE_STDLIB_H
#  include <stdlib.h>
#endif
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#include <stdio.h>
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#ifdef HAVE_STDARG_H
#  include <stdarg.h>
#endif
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#include <time.h>
#include <sys/types.h>
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#ifdef HAVE_CRYPT_H
#  include <crypt.h>
#endif
#ifdef HAVE_UNISTD_H
#  include <unistd.h>
#endif
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#ifdef HAVE_STRING_H
#  include <string.h>
#endif
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#include <assert.h>
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#include <setjmp.h>
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#include "getopt.h"
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#include "misc-types.h"
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#include "s-string.h"
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#include "kom-types.h"
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#include "lyskomd.h"
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#include "log.h"
#include "server/smalloc.h"
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#include "misc-parser.h"
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#include "cache.h"
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#include "kom-config.h"
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#include "debug.h"
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#include "dbck-cache.h"
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#include "param.h"
#include "server-config.h"
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#include "async.h"
#include "com.h"
#include "connections.h"
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#include "kom-errno.h"
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#include "manipulate.h"
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#include "version-info.h"
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#include "ram-output.h"
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#include "unused.h"
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#include "local-to-global.h"
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#include "lockdb.h"
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#define OPT_PERS_PRESENTATION_CONF      1
#define OPT_CONF_PRESENTATION_CONF      2
#define OPT_MOTD_CONF                   3
#define OPT_MOTD_OF_KOM                 4
#define OPT_KOM_NEWS_CONF               5


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static struct option longopts[] = {
    {"compact-text-mass", 0, 0, 'g' },
    {"interactive", 0, 0, 'i' },
    {"auto-repair", 0, 0, 'r' },
    {"verbose", 0, 0, 'v' },
    {"print-statistics", 0, 0, 's' },
    {"list-text-no", 0, 0, 't' },
    {"set-change-name", 0, 0, 'c' },
    {"clear-password", required_argument, 0, 'P' },
    {"grant-all", required_argument, 0, 'G' },
    {"output-version", required_argument, 0, 'o' },
    {"force-output", 0, 0, 'F' },
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    {"pers-pres-conf", required_argument, 0, 
     OPT_PERS_PRESENTATION_CONF },
    {"conf-pres-conf", required_argument, 0, 
     OPT_CONF_PRESENTATION_CONF },
    {"motd-conf", required_argument, 0, OPT_MOTD_CONF },
    {"motd-of-kom", required_argument, 0, OPT_MOTD_OF_KOM },
    {"kom-news-conf", required_argument, 0, OPT_KOM_NEWS_CONF },
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    {"help", 0, 0, 'h' },
    { 0, 0, 0, 0 }
};

    
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extern Info kom_info;
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/* This is set to TRUE if init_cache finds out that the last part of the
   database is missing. */
Bool truncated_texts = FALSE;

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int vflag=0;			/* Verbose - list statistics also. */
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static int iflag=0;		/* Interactive - prompt user and repair. */
static int rflag=0;		/* Repair simple error without confirmation. */
static int gflag=0;		/* Garbage collect text-file. */
static int sflag=0;		/* Statistic flag. */
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static Pers_no reset_pwd=0;	/* Person whose password should be cleared. */
static Pers_no grant_all=0;	/* Person which should receive all bits. */
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/* The following variable holds the output format */

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long oformat=-1;		/* Output format */
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static long force_output=0;	/* Force sync (for conversions) */
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/* The following variables hold kom_info modifications */

int pers_pres_conf = -1;
int conf_pres_conf = -1;
int motd_conf = -1;
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Text_no motd_of_lyskom = (Text_no)-1;
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int kom_news_conf = -1;


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/* The following variable corresponds to the -c flag, and is
   present here due to a bug in lyskomd 1.6.1. */
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static int unset_change_name_is_error=0;
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/* A list of all available text numbers was useful when developing
   new data structures in lyskomd in 1995.  Option: -t. */
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static int dump_text_numbers=0;
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int modifications = 0;

typedef struct {
    int	created_confs;
} Person_scratchpad;

static const Person_scratchpad   EMPTY_PERSON_SCRATCHPAD = { 0 };

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static Person_scratchpad **person_scratchpad = NULL;
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int buglevel = 0;
BUGDECL;
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struct delete_list {
    struct delete_list *next;
    Local_text_no lno;
};

static void
delete_list_append(struct delete_list **head,
		   Local_text_no lno)
{
    struct delete_list *item = smalloc(sizeof(struct delete_list));
    item->next = *head;
    item->lno =  lno;
    *head = item;
}

static void
execute_deletions(Local_to_global *l2g,
		  struct delete_list **head)
{
    struct delete_list *item;

    while (*head != NULL)
    {
	item = *head;
	*head = item->next;
	l2g_delete(l2g, item->lno);
	sfree(item);
    }
}


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#if defined(HAVE_VFPRINTF) && defined(HAVE_STDARG_H)
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extern void
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kom_log (const char * format, ...)
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{
    va_list AP;

    va_start(AP, format);

    vfprintf(stdout, format, AP);

    va_end(AP);
}
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#else
extern void
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kom_log (format, a, b, c, d, e, f, g)
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     const char * format;
     int a, b, c, d, e, f, g;
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{
    fprintf(stdout, format, a, b, c, d, e, f, g);
}
#endif
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#if defined(HAVE_VFPRINTF) && defined(HAVE_STDARG_H)
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extern void
restart_kom (const char * format, ...)
{
    va_list AP;

    va_start(AP, format);

    vfprintf(stdout, format, AP);

    va_end(AP);
    exit(1);
}
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#else
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extern void
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restart_kom (format, a, b, c, d, e, f, g)
     const char * format;
     int a, b, c, d, e, f, g;
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{
    fprintf(stdout, format, a, b, c, d, e, f, g);
    exit(1);
}
#endif
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static Person_scratchpad *
alloc_person_scratchpad(void)
{
    Person_scratchpad *p;

    p = smalloc(sizeof(Person_scratchpad));
    *p = EMPTY_PERSON_SCRATCHPAD;
    return p;
}


static Bool
is_comment_to(Text_no    comment,
	      Text_stat *parent)
{
    int i;

    for ( i = 0; i < parent->no_of_misc; i++ )
    {
	switch( parent->misc_items[ i ].type )
	{
	case comm_in:
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	    if ( parent->misc_items[ i ].datum.text_link == comment )
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		return TRUE;
	    break;
	default:
	    break;
	}
    }

    return FALSE;
}

static Bool
is_commented_in(Text_no    parent,
		Text_stat *child)
{
    int i;

    for ( i = 0; i < child->no_of_misc; i++ )
    {
	switch( child->misc_items[ i ].type )
	{
	case comm_to:
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	    if ( child->misc_items[ i ].datum.text_link == parent )
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		return TRUE;
	    break;
	default:
	    break;
	}
    }

    return FALSE;
}
	
static Bool
is_footnote_to(Text_no    footnote,
	       Text_stat *parent)
{
    int i;

    for ( i = 0; i < parent->no_of_misc; i++ )
    {
	switch( parent->misc_items[ i ].type )
	{
	case footn_in:
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	    if ( parent->misc_items[ i ].datum.text_link == footnote )
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		return TRUE;
	    break;
	default:
	    break;
	}
    }

    return FALSE;
}

static Bool
is_footnoted_in(Text_no    parent,
		Text_stat *child)
{
    int i;

    for ( i = 0; i < child->no_of_misc; i++ )
    {
	switch( child->misc_items[ i ].type )
	{
	case footn_to:
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	    if ( child->misc_items[ i ].datum.text_link == parent )
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		return TRUE;
	    break;
	default:
	    break;
	}
    }

    return FALSE;
}

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Member *
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locate_member(Pers_no      pers_no,
	      Conference * conf_c)
{
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    Member * mbr;
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    int      i;

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    for(mbr = conf_c->members.members, i = conf_c->members.no_of_members;
	i > 0; i--, mbr++)
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    {
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	if ( mbr->member == pers_no )
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	{
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	    return mbr;
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	}
    }

    return NULL;
}

/*
 * Delete a misc_info.
 * If it is a recpt, cc_recpt, comm_to or footn_to delete any
 * loc_no, rec_time, sent_by or sent_at that might follow it.
 *
 * Note that the Misc_info is not reallocated.
 */

static void
delete_misc (Text_stat *tstat,
	     Misc_info *misc)	/* Pointer to first misc_item to delete. */
{
    int del = 1;		/* Number of items to delete. */
    				/* Always delete at least one item. */
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    Bool ready = FALSE;
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    /* Check range of misc */

    if (misc < tstat->misc_items
	|| misc >= tstat->misc_items + tstat->no_of_misc )
    {
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	restart_kom("delete_misc() - misc out of range\n");
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    }

    while (ready == FALSE
	   && misc + del < tstat->misc_items + tstat->no_of_misc )
    {
	switch ( misc[ del ].type )
	{
	case loc_no:
	case rec_time:
	case sent_by:
	case sent_at:
	    del++;
	    break;

	case recpt:
	case cc_recpt:
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        case bcc_recpt:
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	case footn_to:
	case footn_in:
	case comm_to:
	case comm_in:
	    ready = TRUE;
	    break;

#ifndef COMPILE_CHECKS
	default:
#endif
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	case unknown_info:
	    restart_kom("delete_misc() - illegal misc found.\n");
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	}
    }

    tstat->no_of_misc -= del;

    /* Move items beyond the deleted ones. */

    while ( misc < tstat->misc_items + tstat->no_of_misc )
    {
	misc[ 0 ] = misc[ del ];
	misc++;
    }
}

static int
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confirm(const char *question)
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{
    if ( iflag )
    {
	fputs(question, stdout);
	fputs(" (y/n) ", stdout);
	while(1)
	    switch(getchar())
	    {
	    case 'y':
	    case 'Y':
		return 1;
	    case 'n':
	    case 'N':
	    case EOF:
		return 0;
	    default:
		break;
	    }
    }
    else
	return 0;
}
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static long
check_misc_any_recipient(Text_no tno,
			 Text_stat *tstat,
			 const char *pretty_type,
			 Conf_no rcpt,
			 Local_text_no lno,
			 Misc_info *previous,
			 const Misc_info **misc)
{
    Conference *c;
    long errors = 0;
    Local_text_no conf_min;
    Local_text_no conf_max;

    c = cached_get_conf_stat(rcpt);
    if (c == NULL && rcpt == 0)
    {
	kom_log("Conference 0 is a %s of text %lu.\n",
		pretty_type, (unsigned long)tno);
	if (rflag || confirm("Repair by deleting misc_item? "))
	{
	    delete_misc(tstat, previous);
	    kom_log("Repaired: Conference 0 is no longer a %s.\n",
		    pretty_type);
	    mark_text_as_changed(tno);
	    modifications++;
	    *misc = previous;
	}
	else
	    errors++;

	return errors;
    }

    if (c == NULL)
	return errors;

    /* Check loc_no */
    conf_min = l2g_lookup(&c->texts, 0);
    conf_max = l2g_first_appendable_key(&c->texts);

    if (lno < conf_min)
    {
	kom_log("Text %lu: %s %lu<%lu>: loc_no is less than %lu\n",
		(unsigned long)tno,
		pretty_type,
		(unsigned long)rcpt,
		(unsigned long)lno,
		(unsigned long)conf_min);
	errors++;
    }
    else if (lno >= conf_max)
    {
	kom_log("Text %lu: %s %lu<%lu>: loc_no is greater than %lu\n",
		(unsigned long)tno,
		pretty_type,
		(unsigned long)rcpt,
		(unsigned long)lno,
		(unsigned long)conf_max);
	errors++;
    }
    else if (l2g_lookup(&c->texts, lno) != tno)
    {
	kom_log("Text %lu: %s %lu<%lu>: that local number is mapped to %lu.\n",
		(unsigned long)tno,
		pretty_type,
		(unsigned long)rcpt,
		(unsigned long)lno,
		(unsigned long)l2g_lookup(&c->texts, lno));
	errors++;
    }

    return errors;
}

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static long
check_misc_infos(Text_no    tno,
		 Text_stat *tstat)
{
    const Misc_info   * misc = tstat->misc_items;
    Misc_info   * previous;
    Misc_info_group group;
    Text_stat *t;
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    long errors=0;
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    while (previous = (Misc_info *)misc,
	   group = parse_next_misc(&misc,
				   tstat->misc_items + tstat->no_of_misc),
	   group.type != m_end_of_list && group.type != m_error )
    {
	switch ( group.type )
	{
	case m_recpt:
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	    check_misc_any_recipient(tno, tstat, "recipient",
				     group.recipient, group.local_no,
				     previous, &misc);
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	    break;

	case m_cc_recpt:
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	    check_misc_any_recipient(tno, tstat, "cc_recipient",
				     group.cc_recipient, group.local_no,
				     previous, &misc);
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	    break;

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	case m_bcc_recpt:
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	    check_misc_any_recipient(tno, tstat, "bcc_recipient",
				     group.bcc_recipient, group.local_no,
				     previous, &misc);
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	    break;

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	case m_comm_to:
	    t = cached_get_text_stat(group.comment_to);

	    if ( t == NULL )
	    {
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		kom_log("Text %lu is a comment to %lu, which doesn't exist.\n",
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		    (unsigned long)tno, (unsigned long)group.comment_to);
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		if (rflag || confirm("Repair by deleting misc_item? "))
		{
		    delete_misc(tstat, previous);
		    mark_text_as_changed(tno);
		    modifications++;
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		    kom_log("Repaired: Comment-link deleted.\n");
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		    misc = previous;
		}
		else
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		    errors++;
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		errors++;
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	    }
	    else if (!is_comment_to(tno, t))
	    {
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		kom_log("Text %lu is a comment to %lu, but not the reverse.\n",
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		    (unsigned long)tno, (unsigned long)group.comment_to);
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		errors++;
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	    }

	    break;

	case m_comm_in:
	    t = cached_get_text_stat(group.commented_in);

	    if ( t == NULL )
	    {
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		kom_log("Text %lu is commented in %lu, which doesn't exist.\n",
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		    (unsigned long)tno, (unsigned long)group.commented_in);
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		if (rflag || confirm("Repair by deleting misc_item? "))
		{
		    delete_misc(tstat, previous);
		    mark_text_as_changed(tno);
		    modifications++;
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		    kom_log("Repaired: Comment-link deleted.\n");
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		    misc = previous;
		}
		else
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		    errors++;
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	    }
	    else if (!is_commented_in(tno, t))
	    {
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		kom_log("Text %lu is commented in %lu, but not the reverse.\n",
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		    (unsigned long)tno, (unsigned long)group.commented_in);
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		errors++;
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	    }

	    break;

	case m_footn_to:
	    t = cached_get_text_stat(group.footnote_to);

	    if ( t == NULL )
	    {
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		kom_log("Text %lu is a footnote to %lu, which doesn't exist.\n",
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		    (unsigned long)tno, (unsigned long)group.footnote_to);
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		if (rflag || confirm("Repair by deleting misc_item? "))
		{
		    delete_misc(tstat, previous);
		    mark_text_as_changed(tno);
		    modifications++;
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		    kom_log("Repaired: Footnote-link deleted.\n");
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		    misc = previous;
		}
		else
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		    errors++;
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	    }
	    else if (!is_footnote_to(tno, t))
	    {
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		kom_log("Text %lu is a footnote to %lu, but not the reverse.\n",
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		    (unsigned long)tno, (unsigned long)group.footnote_to);
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		errors++;
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	    }

	    break;
	    
	case m_footn_in:
	    t = cached_get_text_stat(group.footnoted_in);

	    if ( t == NULL )
	    {
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		kom_log("Text %lu is footnoted in %lu, which doesn't exist.\n",
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		    (unsigned long)tno, (unsigned long)group.footnoted_in);
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		if (rflag || confirm("Repair by deleting misc_item? "))
		{
		    delete_misc(tstat, previous);
		    mark_text_as_changed(tno);
		    modifications++;
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		    kom_log("Repaired: Footnote-link deleted.\n");
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		    misc = previous;
		}
		else
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		    errors++;
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	    }
	    else if (!is_footnoted_in(tno, t))
	    {
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		kom_log("Text %lu is footnoted in %lu, but not the reverse.\n",
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		    (unsigned long)tno, (unsigned long)group.footnoted_in);
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		errors++;
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	    }

	    break;

	default:
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	    kom_log("check_misc_infos(): parse_next_misc returned type %lu\n",
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		(unsigned long)group.type);
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	    break;
	}
    }

    if ( group.type == m_error )
    {
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	kom_log("Text %lu has a bad misc_info_list.\n", (unsigned long)tno);
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	errors++;
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    }

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    return errors;
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}

		    
		     
		 
static long
check_texts(void)
{
    Text_no    ct = 0;
    Text_stat *ctp=NULL;
    long	errors = 0;
    Text_no	number_of_texts = 0;
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    unsigned long	bytes=0;
    unsigned long	max_bytes=0;
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    Text_no	max_text=0;

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    while ( (ct = traverse_text(ct)) != 0 )
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    {
	number_of_texts++;
	
	ctp = cached_get_text_stat( ct );
	if ( ctp == NULL )
	{
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	    kom_log("Text %lu nonexistent.\n", ct);
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	    errors++;
	}
	else
	{
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	    if (dump_text_numbers)
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		kom_log("Checking text_no %ld\n", (unsigned long)ct);
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	    bytes += ctp->no_of_chars;
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	    if ( (unsigned long)ctp->no_of_chars > max_bytes )
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	    {
		max_bytes = ctp->no_of_chars;
		max_text = ct;
	    }
	    
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	    /* FIXME (bug 147): no_of_marks is not yet checked. */
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	    errors += check_misc_infos(ct, ctp);
	}
    }

    if (vflag)
    {
	if ( number_of_texts == 0 )
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	    kom_log("WARNING: No texts found.\n");
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	else
	{
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	    kom_log("Total of %lu texts (total %lu bytes, avg. %lu bytes/text).\n",
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		(unsigned long)number_of_texts,
		(unsigned long)bytes,
		(unsigned long)(bytes/number_of_texts));
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	    kom_log("Longest text is %lu (%lu bytes).\n",
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		(unsigned long)max_text, (unsigned long)max_bytes);
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	}
    }
    
    return errors;
}


static int
check_created_texts(Pers_no pno,
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		    Local_to_global *created)
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{
    Text_stat *t;
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    int errors=0;
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    L2g_iterator iter;
    struct delete_list *del_list = NULL;
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    for (l2gi_searchall(&iter, created); !iter.search_ended; l2gi_next(&iter))
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    {
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	assert(iter.tno != 0);
	assert(iter.lno != 0);
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	t = cached_get_text_stat(iter.tno);
	if ( t != NULL && t->author != pno)
	{
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	    kom_log("Person %lu is author of text %lu whose author is %lu.\n",
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		(unsigned long)pno, (unsigned long)iter.tno,
		(unsigned long)t->author);
	    errors++;
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	}

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	if ( t == NULL )
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	{
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	    kom_log("Person %lu is author of text %lu, which doesn't exist.\n",
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		(unsigned long)pno, (unsigned long)iter.tno);
	    if ( rflag ||
		 confirm("Repair by setting to text_no to 0 in local map"))
	    {
		delete_list_append(&del_list, iter.lno);
		mark_person_as_changed(pno);
		modifications++;
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		kom_log("Repaired: created_texts corrected.\n");
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	    }
	    else
		errors++;
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	}
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    }
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    execute_deletions(created, &del_list);
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    return errors;
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}

static int
check_membership(Pers_no pno,
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		 Membership *mship)
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{
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    int errors=0;
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    Conference *conf;
    int i;
    Local_text_no last=0;
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    Member *mem;
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    conf = cached_get_conf_stat(mship->conf_no);
    if ( conf == NULL )
    {
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	kom_log("Person %lu is a member in the non-existing conference %lu.\n",
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	    (unsigned long)pno, (unsigned long)mship->conf_no);
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	errors++;
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    }
    else
    {
	/* Check read texts */
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	if (mship->last_text_read >= l2g_first_appendable_key(&conf->texts))
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	{
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	    kom_log("Person %lu %s %lu in conf %lu, which only has %lu texts.\n",
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		(unsigned long)pno,
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		"has read text",
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		(unsigned long)mship->last_text_read,
		(unsigned long)mship->conf_no,
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		(unsigned long)(l2g_first_appendable_key(&conf->texts) -1));
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	    errors++;
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	}

	for ( last = i = 0; i < mship->no_of_read; i++)
	{
	    if ( mship->read_texts[i] <= last )
	    {
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		kom_log("Person %lu's membership in %lu %s %lu<%lu> <= %lu.\n",
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		    (unsigned long)pno, (unsigned long)mship->conf_no,
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		    "is corrupt: read text number",
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		    (unsigned long)mship->read_texts[i], (unsigned long)i,
		    (unsigned long)last);
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		errors++;
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	    }

	    last = mship->read_texts[i];
	}

	/* Check that he is a member */
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	if ( (mem = locate_member(pno, conf)) == NULL )
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	{
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	    kom_log("Person %lu is a member in %lu in which he isn't a member.\n",
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		(unsigned long)pno, (unsigned long)mship->conf_no);
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	    errors++;
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	}
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        else
        {
            /* Check duplicated information
               Short circuit and in each check sets foo_e
               if an error has been detected
            */

            if (mem->type.invitation != mship->type.invitation ||
                mem->type.passive != mship->type.passive ||
                mem->type.secret != mship->type.secret ||
                mem->type.reserved1 != mship->type.reserved1 ||
                mem->type.reserved2 != mship->type.reserved2 ||
                mem->type.reserved3 != mship->type.reserved3 ||
                mem->type.reserved4 != mship->type.reserved4 ||
                mem->type.reserved5 != mship->type.reserved5 ||
                mem->added_at != mship->added_at ||
                mem->added_by != mship->added_by)
            {
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                kom_log("Person %lu membership in %lu does not match member record.\n",
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                    (unsigned long)pno,
                    (unsigned long)mship->conf_no
                    );

                errors++;

                fputs("Membership:", stdout);
                printf("  type:      %s%s%s%s%s%s%s%s\n",
                       mship->type.invitation ? "invitation " : "",
                       mship->type.passive ? "passive " : "",
                       mship->type.secret ? "secret " : "",
                       mship->type.reserved1 ? "rsv1 "  : "",
                       mship->type.reserved2 ? "rsv2 "  : "",
                       mship->type.reserved3 ? "rsv3 "  : "",
                       mship->type.reserved4 ? "rsv4 "  : "",
                       mship->type.reserved5 ? "rsv5"  : "");
                printf("  added_by: %lu\n", (unsigned long)mship->added_by);
                printf("  added_at: %lu\n", (unsigned long)mship->added_at);
                fputs("Member:", stdout);
                printf("  type:      %s%s%s%s%s%s%s%s\n",
                       mem->type.invitation ? "invitation " : "",
                       mem->type.passive ? "passive " : "",
                       mem->type.secret ? "secret " : "",
                       mem->type.reserved1 ? "rsv1 "  : "",
                       mem->type.reserved2 ? "rsv2 "  : "",
                       mem->type.reserved3 ? "rsv3 "  : "",
                       mem->type.reserved4 ? "rsv4 "  : "",
                       mem->type.reserved5 ? "rsv5"  : "");
                printf("  added_by: %lu\n", (unsigned long)mem->added_by);
                printf("  added_at: %lu\n", (unsigned long)mem->added_at);

                if (confirm("Copy membership to member"))
                {
                    mem->added_at = mship->added_at;
                    mem->added_by = mship->added_by;
                    mem->type = mship->type;
                    modifications++;
                }
                else if (confirm("Copy member to membership"))
                {
                    mship->added_at = mem->added_at;
                    mship->added_by = mem->added_by;
                    mship->type = mem->type;
                    modifications++;
                }
            }
        }
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    }

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    return errors;
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}

	    

static int
check_membership_list(Pers_no pno,
		      const Membership_list *mlist)
{
    int errors=0;
    int i;
    
    for (i = 0; i < mlist->no_of_confs; i++)
	errors += check_membership(pno, &mlist->confs[i]);

    return errors;
}


static int
check_persons(void)
{
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    static char crypt_seed[] = 
	"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
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    Pers_no     cp = 0;
    Person     *pstat=NULL;
    Conference *cstat=NULL;
    long	errors = 0;
    Pers_no	number_of_persons=0;

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    while ( (cp = traverse_person(cp)) != 0 )
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    {
	number_of_persons++;
	pstat = cached_get_person_stat (cp);
	cstat = cached_get_conf_stat (cp);
	
	if ( pstat == NULL )
	{
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	    kom_log("Person %lu nonexistent.\n", (unsigned long)cp);
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	    errors++;
	}
	else if (cstat == NULL)
	{
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	    kom_log("Person %lu has no conference.\n", (unsigned long)cp);
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	    errors++;
	}
	else if (!cstat->type.letter_box)
	{
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	    kom_log("Person %lu's conference is not a letter_box.\n",
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		(unsigned long)cp);
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	    errors++;
	}
	else
	{
	    errors += (check_created_texts(cp, &pstat->created_texts)
		       + check_membership_list(cp, &pstat->conferences));
	}
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	if (unset_change_name_is_error == 1
	    && pstat->privileges.change_name == 0)
	{
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	    kom_log("Person %lu has no change_name capability.\n",
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		(unsigned long)cp);
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	    if (rflag || confirm("Grant him the capability"))
	    {
		pstat->privileges.change_name = 1;
		mark_person_as_changed(cp);
		modifications++;
	    }
	    else
		errors++;
	}
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	if (cp == reset_pwd)
	{
	    char salt[3];
	  
	    salt[0] = crypt_seed [rand() % (sizeof (crypt_seed) - 1)];
	    salt[1] = crypt_seed [rand() % (sizeof (crypt_seed) - 1)];
	    salt[2] = '\0';