smbutil.c 41.3 KB
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/* smbutil.c */

/* Synchronet message base (SMB) utility */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
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 * Copyright 2004 Rob Swindell - http://www.synchro.net/copyright.html		*
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 *																			*
 * This program 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 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

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#define SMBUTIL_VER "2.33"
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char	revision[16];
char	compiler[32];
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const char *wday[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
const char *mon[]={"Jan","Feb","Mar","Apr","May","Jun"
            ,"Jul","Aug","Sep","Oct","Nov","Dec"};


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#define NOANALYSIS		(1L<<0)
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#define NOCRC			(1L<<1)
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#ifdef __WATCOMC__
	#define ffblk find_t
    #define findfirst(x,y,z) _dos_findfirst(x,z,y)
	#define findnext(x) _dos_findnext(x)
#endif

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#if defined(_WIN32)
	#include <ctype.h>	/* isdigit() */
	#include <conio.h>	/* getch() */
#endif

/* ANSI */
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#include <stdio.h>
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#include <time.h>		/* time */
#include <errno.h>		/* errno */
#include <string.h>		/* strrchr */
#include <ctype.h>		/* toupper */
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#include "genwrap.h"	/* stricmp */
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#include "dirwrap.h"	/* fexist */
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#include "conwrap.h"	/* getch */
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#include "filewrap.h"
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#include "smblib.h"
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#include "crc16.h"
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#include "crc32.h"
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#include "gen_defs.h"	/* MAX_PATH */
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#ifdef __WATCOMC__
	#include <dos.h>
#endif

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/* gets is dangerous */
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#define gets(str)  fgets((str), sizeof(str), stdin)
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#define CHSIZE_FP(fp,size)	if(chsize(fileno(fp),size)) printf("chsize failed!\n");

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/********************/
/* Global variables */
/********************/

smb_t smb;
ulong mode=0L;
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ushort tzone=0;
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/************************/
/* Program usage/syntax */
/************************/

char *usage=
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"usage: smbutil [-opts] cmd <filespec.shd>\n"
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"\n"
"cmd:\n"
"       l[n] = list msgs starting at number n\n"
"       r[n] = read msgs starting at number n\n"
"       v[n] = view msg headers starting at number n\n"
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"       i[f] = import msg from text file f (or use stdin)\n"
"       e[f] = import e-mail from text file f (or use stdin)\n"
"       n[f] = import netmail from text file f (or use stdin)\n"
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"       h    = dump hash file\n"
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"       s    = display msg base status\n"
"       c    = change msg base status\n"
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"       d    = delete all msgs\n"
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"       m    = maintain msg base - delete old msgs and msgs over max\n"
"       p[k] = pack msg base (k specifies minimum packable Kbytes)\n"
"opts:\n"
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"       c    = create message base if it doesn't exist\n"
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"       a    = always pack msg base (disable compression analysis)\n"
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"       i    = ignore duplicate messages (do not store CRC)\n"
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"       d    = use default values (no prompt) for to, from, and subject\n"
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"       t<s> = set 'to' user name for imported message\n"
"       n<s> = set 'to' netmail address for imported message\n"
"       u<s> = set 'to' user number for imported message\n"
"       f<s> = set 'from' user name for imported message\n"
"       e<s> = set 'from' user number for imported message\n"
"       s<s> = set 'subject' for imported message\n"
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"       z[n] = set time zone (n=min +/- from UT or 'EST','EDT','CST',etc)\n"
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"       #    = set number of messages to view/list (e.g. -1)\n"
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;

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/*****************************************************************************/
// Expands Unix LF to CRLF
/*****************************************************************************/
ulong lf_expand(BYTE* inbuf, ulong inlen, BYTE* outbuf)
{
	ulong	i,j;
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	for(i=j=0;i<inlen;i++) {
		if(inbuf[i]=='\n' && (!i || inbuf[i-1]!='\r'))
			outbuf[j++]='\r';
		outbuf[j++]=inbuf[i];
	}
	return(j);
}
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#include "truncsp.c"

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/****************************************************************************/
/* Adds a new message to the message base									*/
/****************************************************************************/
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void postmsg(char type, char* to, char* to_number, char* to_address, 
			 char* from, char* from_number, char* subject, FILE* fp)
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{
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	char	str[128];
	char	buf[128];
	char	pad=0;
	char*	msgtxt=NULL;
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	char*	newtxt;
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	long	msgtxtlen;
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	ushort	xlat,net;
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	int 	i;
	long	l,length;
	ulong	offset,crc;
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	ushort		agent=AGENT_SMBUTIL;
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	smbmsg_t	msg;

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	/* Read message text from stream (file or stdin) */
	msgtxtlen=0;
	while(!feof(fp)) {
		i=fread(buf,1,sizeof(buf),fp);
		if(i<1)
			break;
		if((msgtxt=(char*)realloc(msgtxt,msgtxtlen+i))==NULL) {
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			fprintf(stderr,"\n\7malloc(%ld) failure\n",msgtxtlen+i);
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			exit(1);
		}
		memcpy(msgtxt+msgtxtlen,buf,i);
		msgtxtlen+=i;
	}

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	if((newtxt=(char*)malloc(msgtxtlen*2))==NULL) {
		fprintf(stderr,"\n\7malloc(%ld) failure\n",msgtxtlen*2);
		exit(1);
	}

	/* Expand LFs to CRLFs */
	msgtxtlen=lf_expand(msgtxt, msgtxtlen, newtxt);
	free(msgtxt);
	msgtxt=newtxt;

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	/* Allocate space in message base */
	length=msgtxtlen+sizeof(xlat);	/* for translation string */
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	if(!(smb.status.attr&SMB_HYPERALLOC)) {
		i=smb_open_da(&smb);
		if(i) {
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			fprintf(stderr,"\n\7!smb_open_da returned %d: %s\n",i,smb.last_error);
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			exit(1); 
		}
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		offset=smb_allocdat(&smb,length,1);
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		smb_close_da(&smb); 
	} else
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		offset=smb_hallocdat(&smb);

	fseek(smb.sdt_fp,offset,SEEK_SET);
	xlat=XLAT_NONE;
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	smb_fwrite(&smb,&xlat,sizeof(xlat),smb.sdt_fp);
	smb_fwrite(&smb,msgtxt,msgtxtlen,smb.sdt_fp);
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	for(l=length;l%SDT_BLOCK_LEN;l++)
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		smb_fwrite(&smb,&pad,sizeof(pad),smb.sdt_fp);
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	fflush(smb.sdt_fp);

	memset(&msg,0,sizeof(smbmsg_t));
	msg.hdr.version=smb_ver();
	msg.hdr.when_written.time=time(NULL);
	msg.hdr.when_written.zone=tzone;
	msg.hdr.when_imported=msg.hdr.when_written;

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	if(smb.status.max_crcs && !(mode&NOCRC)) {
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		crc=0xffffffffUL;
		for(l=0;l<msgtxtlen;l++) 
			crc=ucrc32(msgtxt[l],crc);
		crc=~crc;
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		i=smb_addcrc(&smb,crc);
		if(i) {
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			fprintf(stderr,"\n\7!smb_addcrc returned %d: %s\n",i,smb.last_error);
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			smb_freemsgdat(&smb,offset,length,1);
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			exit(1); 
		} 
	}
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	msg.hdr.offset=offset;

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	if(to==NULL) {
		printf("To User Name: ");
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		fgets(str,sizeof(str),stdin); 
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	} else
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		SAFECOPY(str,to);
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	truncsp(str);
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	i=smb_hfield_str(&msg,RECIPIENT,str);
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	if(i) {
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		fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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		smb_freemsgdat(&smb,offset,length,1);
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		exit(1); 
	}
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	if(type=='E' || type=='N')
		smb.status.attr|=SMB_EMAIL;
	if(smb.status.attr&SMB_EMAIL) {
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		if(to_number==NULL) {
			printf("To User Number (0=QWKnet or Internet): ");
			gets(str);
		} else
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			SAFECOPY(str,to_number);
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		truncsp(str);
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		i=smb_hfield_str(&msg,RECIPIENTEXT,str);
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		if(i) {
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			fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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			smb_freemsgdat(&smb,offset,length,1);
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			exit(1); 
		}
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		msg.idx.to=atoi(str); 
	}
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	else {
		strlwr(str);
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		msg.idx.to=crc16(str,0); 
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	}
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	if(smb.status.attr&SMB_EMAIL && (type=='N' || !msg.idx.to)) {
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		if(to_address==NULL) {
			printf("To Address: ");
			gets(str);
		} else
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			SAFECOPY(str,to_address);
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		truncsp(str);
		if(*str) {
			if(strchr(str,'.'))
				net=NET_INTERNET;
			else
				net=NET_QWK;
			i=smb_hfield(&msg,RECIPIENTNETTYPE,sizeof(net),&net);
			if(i) {
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				fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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				smb_freemsgdat(&smb,offset,length,1);
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				exit(1); 
			}
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			i=smb_hfield_str(&msg,RECIPIENTNETADDR,str);
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			if(i) {
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				fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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				smb_freemsgdat(&smb,offset,length,1);
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				exit(1); 
			} 
		} 
	}
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	if(from==NULL) {
		printf("From User Name: ");
		gets(str);
	} else
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		SAFECOPY(str,from);
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	truncsp(str);
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	i=smb_hfield_str(&msg,SENDER,str);
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	if(i) {
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		fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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		smb_freemsgdat(&smb,offset,length,1);
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		exit(1); 
	}
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	if(smb.status.attr&SMB_EMAIL) {
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		if(from_number==NULL) {
			printf("From User Number: ");
			gets(str);
		} else
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			SAFECOPY(str,from_number);
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		truncsp(str);
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		i=smb_hfield_str(&msg,SENDEREXT,str);
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		if(i) {
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			fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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			smb_freemsgdat(&smb,offset,length,1);
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			exit(1); 
		}
		msg.idx.from=atoi(str); 
	} else {
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		strlwr(str);
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		msg.idx.from=crc16(str,0); 
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	}
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	smb_hfield(&msg, SENDERAGENT, sizeof(agent), &agent);
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	if(subject==NULL) {
		printf("Subject: ");
		gets(str);
	} else
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		SAFECOPY(str,subject);
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	truncsp(str);
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	i=smb_hfield_str(&msg,SUBJECT,str);
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	if(i) {
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		fprintf(stderr,"\n\7!smb_hfield returned %d: %s\n",i,smb.last_error);
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		smb_freemsgdat(&smb,offset,length,1);
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		exit(1); 
	}
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	msg.idx.subj=smb_subject_crc(str);
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	i=smb_dfield(&msg,TEXT_BODY,length);
	if(i) {
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		fprintf(stderr,"\n\7!smb_dfield returned %d: %s\n",i,smb.last_error);
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		smb_freemsgdat(&smb,offset,length,1);
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		exit(1); 
	}
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	sprintf(str,"SMBUTIL %s-%s r%s %s %s"
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		,SMBUTIL_VER
		,PLATFORM_DESC
		,revision
		,__DATE__
		,compiler
		);
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	smb_hfield_str(&msg,FIDOPID,str);
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	i=smb_addmsghdr(&smb,&msg,smb.status.attr&SMB_HYPERALLOC);

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	if(i!=SMB_SUCCESS) {
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		fprintf(stderr,"\n\7!smb_addmsghdr returned %d: %s\n",i,smb.last_error);
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		smb_freemsg_dfields(&smb,&msg,1);
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		exit(1); 
	}
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	smb_freemsgmem(&msg);
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	free(msgtxt);
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}

/****************************************************************************/
/* Shows the message base header											*/
/****************************************************************************/
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void showstatus(void)
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{
	int i;

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	i=smb_locksmbhdr(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_locksmbhdr returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	i=smb_getstatus(&smb);
	smb_unlocksmbhdr(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_getstatus returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	printf("last_msg        =%lu\n"
		   "total_msgs      =%lu\n"
		   "header_offset   =%lu\n"
		   "max_crcs        =%lu\n"
		   "max_msgs        =%lu\n"
		   "max_age         =%u\n"
		   "attr            =%04Xh\n"
		   ,smb.status.last_msg
		   ,smb.status.total_msgs
		   ,smb.status.header_offset
		   ,smb.status.max_crcs
		   ,smb.status.max_msgs
		   ,smb.status.max_age
		   ,smb.status.attr
		   );
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}

/****************************************************************************/
/* Configure message base header											*/
/****************************************************************************/
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void config(void)
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{
	char max_msgs[128],max_crcs[128],max_age[128],header_offset[128],attr[128];
	int i;

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	i=smb_locksmbhdr(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_locksmbhdr returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	i=smb_getstatus(&smb);
	smb_unlocksmbhdr(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_getstatus returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	printf("Header offset =%-5lu  New value (CR=No Change): "
		,smb.status.header_offset);
	gets(header_offset);
	printf("Max msgs      =%-5lu  New value (CR=No Change): "
		,smb.status.max_msgs);
	gets(max_msgs);
	printf("Max crcs      =%-5lu  New value (CR=No Change): "
		,smb.status.max_crcs);
	gets(max_crcs);
	printf("Max age       =%-5u  New value (CR=No Change): "
		,smb.status.max_age);
	gets(max_age);
	printf("Attributes    =%-5u  New value (CR=No Change): "
		,smb.status.attr);
	gets(attr);
	i=smb_locksmbhdr(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_locksmbhdr returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	i=smb_getstatus(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_getstatus returned %d: %s\n",i,smb.last_error);
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		smb_unlocksmbhdr(&smb);
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		return; 
	}
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	if(isdigit(max_msgs[0]))
		smb.status.max_msgs=atol(max_msgs);
	if(isdigit(max_crcs[0]))
		smb.status.max_crcs=atol(max_crcs);
	if(isdigit(max_age[0]))
		smb.status.max_age=atoi(max_age);
	if(isdigit(header_offset[0]))
		smb.status.header_offset=atol(header_offset);
	if(isdigit(attr[0]))
		smb.status.attr=atoi(attr);
	i=smb_putstatus(&smb);
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	smb_unlocksmbhdr(&smb);
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	if(i)
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		fprintf(stderr,"\n\7!smb_putstatus returned %d: %s\n",i,smb.last_error);
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}

/****************************************************************************/
/* Lists messages' to, from, and subject                                    */
/****************************************************************************/
void listmsgs(ulong start, ulong count)
{
	int i;
	ulong l=0;
	smbmsg_t msg;

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	if(!start)
		start=1;
	fseek(smb.sid_fp,(start-1L)*sizeof(idxrec_t),SEEK_SET);
	while(l<count) {
		if(!fread(&msg.idx,1,sizeof(idxrec_t),smb.sid_fp))
			break;
		i=smb_lockmsghdr(&smb,&msg);
		if(i) {
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			fprintf(stderr,"\n\7!smb_lockmsghdr returned %d: %s\n",i,smb.last_error);
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			break; 
		}
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		i=smb_getmsghdr(&smb,&msg);
		smb_unlockmsghdr(&smb,&msg);
		if(i) {
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			fprintf(stderr,"\n\7!smb_getmsghdr returned %d: %s\n",i,smb.last_error);
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			break; 
		}
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		printf("%4lu %-25.25s %-25.25s %.20s\n"
			,msg.hdr.number,msg.from,msg.to,msg.subj);
		smb_freemsgmem(&msg);
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		l++; 
	}
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}

char *binstr(uchar *buf, ushort length)
{
	static char str[512];
	char tmp[128];
	int i;

	str[0]=0;
	for(i=0;i<length;i++)
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		if(buf[i] && (buf[i]<' ' || buf[i]>=0x7f) 
			&& buf[i]!='\r' && buf[i]!='\n' && buf[i]!='\t')
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			break;
	if(i==length)		/* not binary */
		return(buf);
	for(i=0;i<length;i++) {
		sprintf(tmp,"%02X ",buf[i]);
		strcat(str,tmp); 
		if(i>=100) {
			strcat(str,"...");
			break;
		}
	}
	return(str);
}

/****************************************************************************/
/* Generates a 24 character ASCII string that represents the time_t pointer */
/* Used as a replacement for ctime()                                        */
/****************************************************************************/
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char *my_timestr(time_t *intime)
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{
    static char str[256];
    char mer[3],hour;
    struct tm *gm;

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	gm=localtime(intime);
	if(gm==NULL) {
		strcpy(str,"Invalid Time");
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		return(str); 
	}
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	if(gm->tm_hour>=12) {
		if(gm->tm_hour==12)
			hour=12;
		else
			hour=gm->tm_hour-12;
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		strcpy(mer,"pm"); 
	}
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	else {
		if(gm->tm_hour==0)
			hour=12;
		else
			hour=gm->tm_hour;
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		strcpy(mer,"am"); 
	}
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	sprintf(str,"%s %s %02d %4d %02d:%02d %s"
		,wday[gm->tm_wday],mon[gm->tm_mon],gm->tm_mday,1900+gm->tm_year
		,hour,gm->tm_min,mer);
	return(str);
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}

/****************************************************************************/
/* Displays message header information										*/
/****************************************************************************/
void viewmsgs(ulong start, ulong count)
{
	int i;
	ulong l=0;
	smbmsg_t msg;

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	if(!start)
		start=1;
	fseek(smb.sid_fp,(start-1L)*sizeof(idxrec_t),SEEK_SET);
	while(l<count) {
		if(!fread(&msg.idx,1,sizeof(idxrec_t),smb.sid_fp))
			break;
		i=smb_lockmsghdr(&smb,&msg);
		if(i) {
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			fprintf(stderr,"\n\7!smb_lockmsghdr returned %d: %s\n",i,smb.last_error);
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			break; 
		}
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		i=smb_getmsghdr(&smb,&msg);
		smb_unlockmsghdr(&smb,&msg);
		if(i) {
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			fprintf(stderr,"\n\7!smb_getmsghdr returned %d: %s\n",i,smb.last_error);
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			break; 
		}
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		printf("--------------------\n");
		printf("%-20.20s %ld\n"		,"index record",ftell(smb.sid_fp)/sizeof(idxrec_t));
		smb_dump_msghdr(stdout,&msg);
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		printf("\n");
		smb_freemsgmem(&msg);
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		l++; 
	}
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}

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/****************************************************************************/
/****************************************************************************/
void dump_hashes(void)
{
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	char	tmp[128];
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	int		retval;
	hash_t	hash;

	if((retval=smb_open_hash(&smb))!=SMB_SUCCESS) {
		fprintf(stderr,"\n\7!smb_open_hash returned %d: %s\n", retval, smb.last_error);
		return;
	}

	while(!smb_feof(smb.hash_fp)) {
		if(smb_fread(&smb,&hash,sizeof(hash),smb.hash_fp)!=sizeof(hash))
			break;
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		printf("\n");
		printf("%-10s: %lu\n",		"Number",	hash.number);
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		printf("%-10s: %s\n",		"Source",	smb_hashsource(hash.source));
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		printf("%-10s: %s\n",		"Time",		my_timestr(&hash.time));
		printf("%-10s: %x\n",		"Flags",	hash.flags);
		if(hash.flags&SMB_HASH_CRC16)
			printf("%-10s: %04x\n",	"CRC-16",	hash.crc16);
		if(hash.flags&SMB_HASH_CRC32)
			printf("%-10s: %08lx\n","CRC-32",	hash.crc32);
		if(hash.flags&SMB_HASH_MD5)
			printf("%-10s: %s\n",	"MD5",		MD5_hex(tmp,hash.md5));
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	}
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	smb_close_hash(&smb);
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}

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/****************************************************************************/
/* Maintain message base - deletes messages older than max age (in days)	*/
/* or messages that exceed maximum											*/
/****************************************************************************/
void maint(void)
{
	int i;
	ulong l,m,n,f,flagged=0;
	time_t now;
	smbmsg_t msg;
	idxrec_t HUGE16 *idx;

	printf("Maintaining %s\r\n",smb.file);
	now=time(NULL);
	i=smb_locksmbhdr(&smb);
	if(i) {
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		fprintf(stderr,"\n\7!smb_locksmbhdr returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	i=smb_getstatus(&smb);
	if(i) {
		smb_unlocksmbhdr(&smb);
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		fprintf(stderr,"\n\7!smb_getstatus returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	if(!smb.status.total_msgs) {
		smb_unlocksmbhdr(&smb);
		printf("Empty\n");
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		return; 
	}
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	printf("Loading index...\n");
	if((idx=(idxrec_t *)LMALLOC(sizeof(idxrec_t)*smb.status.total_msgs))
		==NULL) {
		smb_unlocksmbhdr(&smb);
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		fprintf(stderr,"\n\7!Error allocating %lu bytes of memory\n"
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			,sizeof(idxrec_t)*smb.status.total_msgs);
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		return; 
	}
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	fseek(smb.sid_fp,0L,SEEK_SET);
	for(l=0;l<smb.status.total_msgs;l++) {
		printf("%lu of %lu\r"
			,l+1,smb.status.total_msgs);
		if(!fread(&idx[l],1,sizeof(idxrec_t),smb.sid_fp))
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			break; 
	}
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	printf("\nDone.\n\n");

	printf("Scanning for pre-flagged messages...\n");
	for(m=0;m<l;m++) {
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		printf("\r%2lu%%",m ? (long)(100.0/((float)l/m)) : 0);
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		if(idx[m].attr&MSG_DELETE)
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			flagged++; 
	}
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	printf("\r100%% (%lu pre-flagged for deletion)\n",flagged);

	if(smb.status.max_age) {
		printf("Scanning for messages more than %u days old...\n"
			,smb.status.max_age);
		for(m=f=0;m<l;m++) {
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			printf("\r%2lu%%",m ? (long)(100.0/((float)l/m)) : 0);
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			if(idx[m].attr&(MSG_PERMANENT|MSG_DELETE))
				continue;
			if((ulong)now>idx[m].time && (now-idx[m].time)/(24L*60L*60L)
				>smb.status.max_age) {
				f++;
				flagged++;
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				idx[m].attr|=MSG_DELETE; 
			} 
		}  /* mark for deletion */
		printf("\r100%% (%lu flagged for deletion)\n",f); 
	}
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	printf("Scanning for read messages to be killed...\n");
	for(m=f=0;m<l;m++) {
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		printf("\r%2lu%%",m ? (long)(100.0/((float)l/m)) : 0);
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		if(idx[m].attr&(MSG_PERMANENT|MSG_DELETE))
			continue;
		if((idx[m].attr&(MSG_READ|MSG_KILLREAD))==(MSG_READ|MSG_KILLREAD)) {
			f++;
			flagged++;
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			idx[m].attr|=MSG_DELETE; 
		} 
	}
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	printf("\r100%% (%lu flagged for deletion)\n",f);

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	if(smb.status.max_msgs && l-flagged>smb.status.max_msgs) {
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		printf("Flagging excess messages for deletion...\n");
		for(m=n=0,f=flagged;l-flagged>smb.status.max_msgs && m<l;m++) {
			if(idx[m].attr&(MSG_PERMANENT|MSG_DELETE))
				continue;
			printf("%lu of %lu\r",++n,(l-f)-smb.status.max_msgs);
			flagged++;
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			idx[m].attr|=MSG_DELETE; 
		}			/* mark for deletion */
		printf("\nDone.\n\n"); 
	}
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	if(!flagged) {				/* No messages to delete */
		LFREE(idx);
		smb_unlocksmbhdr(&smb);
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		return; 
	}
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	if(!(mode&NOANALYSIS)) {

		printf("Freeing allocated header and data blocks for deleted messages...\n");
		if(!(smb.status.attr&SMB_HYPERALLOC)) {
			i=smb_open_da(&smb);
			if(i) {
				smb_unlocksmbhdr(&smb);
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				fprintf(stderr,"\n\7!smb_open_da returned %d: %s\n",i,smb.last_error);
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				exit(1); 
			}
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			i=smb_open_ha(&smb);
			if(i) {
				smb_unlocksmbhdr(&smb);
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				fprintf(stderr,"\n\7!smb_open_ha returned %d: %s\n",i,smb.last_error);
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				exit(1); 
			} 
		}
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		for(m=n=0;m<l;m++) {
			if(idx[m].attr&MSG_DELETE) {
				printf("%lu of %lu\r",++n,flagged);
				msg.idx=idx[m];
				msg.hdr.number=msg.idx.number;
				if((i=smb_getmsgidx(&smb,&msg))!=0) {
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					fprintf(stderr,"\n\7!smb_getmsgidx returned %d: %s\n",i,smb.last_error);
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					continue; 
				}
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				i=smb_lockmsghdr(&smb,&msg);
				if(i) {
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					fprintf(stderr,"\n\7!smb_lockmsghdr returned %d: %s\n",i,smb.last_error);
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					break; 
				}
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				if((i=smb_getmsghdr(&smb,&msg))!=0) {
					smb_unlockmsghdr(&smb,&msg);
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					fprintf(stderr,"\n\7!smb_getmsghdr returned %d: %s\n",i,smb.last_error);
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					break; 
				}
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				msg.hdr.attr|=MSG_DELETE;			/* mark header as deleted */
				if((i=smb_putmsg(&smb,&msg))!=0) {
					smb_freemsgmem(&msg);
					smb_unlockmsghdr(&smb,&msg);
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					fprintf(stderr,"\n\7!smb_putmsg returned %d: %s\n",i,smb.last_error);
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					break; 
				}
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				smb_unlockmsghdr(&smb,&msg);
				if((i=smb_freemsg(&smb,&msg))!=0) {
					smb_freemsgmem(&msg);
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					fprintf(stderr,"\n\7!smb_freemsg returned %d: %s\n",i,smb.last_error);
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					break; 
				}
				smb_freemsgmem(&msg); 
			} 
		}
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		if(!(smb.status.attr&SMB_HYPERALLOC)) {
			smb_close_ha(&smb);
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			smb_close_da(&smb); 
		}
		printf("\nDone.\n\n"); 
	}
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	printf("Re-writing index...\n");
	rewind(smb.sid_fp);
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	CHSIZE_FP(smb.sid_fp,0);
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	for(m=n=0;m<l;m++) {
		if(idx[m].attr&MSG_DELETE)
			continue;
		printf("%lu of %lu\r",++n,l-flagged);
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		fwrite(&idx[m],sizeof(idxrec_t),1,smb.sid_fp); 
	}
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	printf("\nDone.\n\n");
	fflush(smb.sid_fp);

	LFREE(idx);
	smb.status.total_msgs-=flagged;
	smb_putstatus(&smb);
	smb_unlocksmbhdr(&smb);
}


typedef struct {
	ulong old,new;
	} datoffset_t;

/****************************************************************************/
/* Removes all unused blocks from SDT and SHD files 						*/
/****************************************************************************/
void packmsgs(ulong packable)
{
	uchar str[128],buf[SDT_BLOCK_LEN],ch,fname[128],tmpfname[128];
	int i,size;
	ulong l,m,n,datoffsets=0,length,total,now;
	FILE *tmp_sdt,*tmp_shd,*tmp_sid;
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	BOOL		error=FALSE;
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	smbhdr_t	hdr;
	smbmsg_t	msg;
	datoffset_t *datoffset=NULL;

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	now=time(NULL);
	printf("Packing %s\n",smb.file);
	i=smb_locksmbhdr(&smb);
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	if(i) {
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		fprintf(stderr,"\n\7!smb_locksmbhdr returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	i=smb_getstatus(&smb);
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	if(i) {
		smb_unlocksmbhdr(&smb);
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		fprintf(stderr,"\n\7!smb_getstatus returned %d: %s\n",i,smb.last_error);
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		return; 
	}
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	if(!(smb.status.attr&SMB_HYPERALLOC)) {
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		i=smb_open_ha(&smb);
		if(i) {
			smb_unlocksmbhdr(&smb);
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			fprintf(stderr,"\n\7!smb_open_ha returned %d: %s\n",i,smb.last_error);
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			return; 
		}
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		i=smb_open_da(&smb);
		if(i) {
			smb_unlocksmbhdr(&smb);
			smb_close_ha(&smb);
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			fprintf(stderr,"\n\7!smb_open_da returned %d: %s\n",i,smb.last_error);
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			return; 
		} 
	}
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	if(!smb.status.total_msgs) {
		printf("Empty\n");
		rewind(smb.shd_fp);
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		CHSIZE_FP(smb.shd_fp,smb.status.header_offset);
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		rewind(smb.sdt_fp);
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		CHSIZE_FP(smb.sdt_fp,0);
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		rewind(smb.sid_fp);
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		CHSIZE_FP(smb.sid_fp,0);
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		if(!(smb.status.attr&SMB_HYPERALLOC)) {
			rewind(smb.sha_fp);
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			CHSIZE_FP(smb.sha_fp,0);
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			rewind(smb.sda_fp);
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			CHSIZE_FP(smb.sda_fp,0);
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			smb_close_ha(&smb);
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			smb_close_da(&smb); 
		}
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		smb_unlocksmbhdr(&smb);
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		return; 
	}
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	if(!(smb.status.attr&SMB_HYPERALLOC) && !(mode&NOANALYSIS)) {
		printf("Analyzing data blocks...\n");
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		length=filelength(fileno(smb.sda_fp));
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		fseek(smb.sda_fp,0L,SEEK_SET);
		for(l=m=0;l<length;l+=2) {
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			printf("\r%2lu%%  ",l ? (long)(100.0/((float)length/l)) : 0);
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			i=0;
			if(!fread(&i,2,1,smb.sda_fp))
				break;
			if(!i)
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				m++; 
		}
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		printf("\rAnalyzing header blocks...\n");
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		length=filelength(fileno(smb.sha_fp));
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		fseek(smb.sha_fp,0L,SEEK_SET);
		for(l=n=0;l<length;l++) {
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			printf("\r%2lu%%  ",l ? (long)(100.0/((float)length/l)) : 0);
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			ch=0;
			if(!fread(&ch,1,1,smb.sha_fp))
				break;
			if(!ch)
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				n++; 
		}
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		if(!m && !n) {
			printf("\rAlready compressed.\n\n");
			smb_close_ha(&smb);
			smb_close_da(&smb);
			smb_unlocksmbhdr(&smb);
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			return; 
		}
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		if(packable && (m*SDT_BLOCK_LEN)+(n*SHD_BLOCK_LEN)<packable*1024L) {
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			printf("\rLess than %luk compressible bytes.\n\n",packable);
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			smb_close_ha(&smb);
			smb_close_da(&smb);
			smb_unlocksmbhdr(&smb);
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			return; 
		}
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		printf("\rCompressing %lu data blocks (%lu bytes)\n"
				 "        and %lu header blocks (%lu bytes)\n"
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				  ,m,m*SDT_BLOCK_LEN,n,n*SHD_BLOCK_LEN); 
	}
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	if(!(smb.status.attr&SMB_HYPERALLOC)) {
		rewind(smb.sha_fp);
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		CHSIZE_FP(smb.sha_fp,0);		/* Reset both allocation tables */
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		rewind(smb.sda_fp);
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		CHSIZE_FP(smb.sda_fp,0); 
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	}
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	if(smb.status.attr&SMB_HYPERALLOC && !(mode&NOANALYSIS)) {
		printf("Analyzing %s\n",smb.file);

		length=filelength(fileno(smb.shd_fp));
		m=n=0;
		for(l=smb.status.header_offset;l<length;l+=size) {
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			printf("\r%2lu%%  ",(long)(100.0/((float)length/l)));
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			msg.idx.offset=l;
			if((i=smb_lockmsghdr(&smb,&msg))!=0) {
				printf("\n(%06lX) smb_lockmsghdr returned %d\n",l,i);
				size=SHD_BLOCK_LEN;
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				continue; 
			}
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			if((i=smb_getmsghdr(&smb,&msg))!=0) {
				smb_unlockmsghdr(&smb,&msg);
				m++;
				size=SHD_BLOCK_LEN;
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				continue; 
			}
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			smb_unlockmsghdr(&smb,&msg);
			if(msg.hdr.attr&MSG_DELETE) {
				m+=smb_hdrblocks(msg.hdr.length);
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				n+=smb_datblocks(smb_getmsgdatlen(&msg)); 
			}
			size=smb_hdrblocks(smb_getmsghdrlen(&msg))*SHD_BLOCK_LEN;
			smb_freemsgmem(&msg); 
		}
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		if(!m && !n) {
			printf("\rAlready compressed.\n\n");
			smb_unlocksmbhdr(&smb);
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			return; 
		}
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		if(packable && (n*SDT_BLOCK_LEN)+(m*SHD_BLOCK_LEN)<packable*1024L) {
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			printf("\rLess than %luk compressible bytes.\n\n",packable);
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			smb_unlocksmbhdr(&smb);
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			return; 
		}
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		printf("\rCompressing %lu data blocks (%lu bytes)\n"
				 "        and %lu header blocks (%lu bytes)\n"
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				  ,n,n*SDT_BLOCK_LEN,m,m*SHD_BLOCK_LEN); 
	}
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	sprintf(fname,"%s.sd$",smb.file);
	tmp_sdt=fopen(fname,"wb");
	sprintf(fname,"%s.sh$",smb.file);
	tmp_shd=fopen(fname,"wb");
	sprintf(fname,"%s.si$",smb.file);
	tmp_sid=fopen(fname,"wb");
	if(!tmp_sdt || !tmp_shd || !tmp_sid) {
		smb_unlocksmbhdr(&smb);
		if(!(smb.status.attr&SMB_HYPERALLOC)) {
			smb_close_ha(&smb);
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			smb_close_da(&smb); 
		}
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		fprintf(stderr,"\n\7!Error opening temp files\n");
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		return; 
	}
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	setvbuf(tmp_sdt,NULL,_IOFBF,2*1024);
	setvbuf(tmp_shd,NULL,_IOFBF,2*1024);
	setvbuf(tmp_sid,NULL,_IOFBF,2*1024);
	if(!(smb.status.attr&SMB_HYPERALLOC)
		&& (datoffset=(datoffset_t *)LMALLOC(sizeof(datoffset_t)*smb.status.total_msgs))
		==NULL) {
		smb_unlocksmbhdr(&smb);
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		smb_close_ha(&smb);
		smb_close_da(&smb);
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		fclose(tmp_sdt);
		fclose(tmp_shd);
		fclose(tmp_sid);
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		fprintf(stderr,"\n\7!Error allocating memory\n");
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		return; 
	}
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	fseek(smb.shd_fp,0L,SEEK_SET);
	fread(&hdr,1,sizeof(smbhdr_t),smb.shd_fp);
	fwrite(&hdr,1,sizeof(smbhdr_t),tmp_shd);
	fwrite(&(smb.status),1,sizeof(smbstatus_t),tmp_shd);
	for(l=sizeof(smbhdr_t)+sizeof(smbstatus_t);l<smb.status.header_offset;l++) {
		fread(&ch,1,1,smb.shd_fp);			/* copy additional base header records */
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		fwrite(&ch,1,1,tmp_shd); 
	}
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	fseek(smb.sid_fp,0L,SEEK_SET);
	total=0;
	for(l=0;l<smb.status.total_msgs;l++) {
		printf("%lu of %lu\r",l+1,smb.status.total_msgs);
		if(!fread(&msg.idx,1,sizeof(idxrec_t),smb.sid_fp))
			break;
		if(msg.idx.attr&MSG_DELETE) {
			printf("\nDeleted index.\n");
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			continue; 
		}
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		i=smb_lockmsghdr(&smb,&msg);
		if(i) {
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			fprintf(stderr,"\n\7!smb_lockmsghdr returned %d: %s\n",i,smb.last_error);
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			continue; 
		}
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		i=smb_getmsghdr(&smb,&msg);
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		smb_unlockmsghdr(&smb,&msg);
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		if(i) {
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			fprintf(stderr,"\n\7!smb_getmsghdr returned %d: %s\n",i,smb.last_error);
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			continue; 
		}
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		if(msg.hdr.attr&MSG_DELETE) {
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			printf("\nDeleted header.\n");
			smb_freemsgmem(&msg);
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			continue; 
		}
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		if(msg.expiration && msg.expiration<=now) {
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			printf("\nExpired message.\n");
			smb_freemsgmem(&msg);
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			continue; 
		}
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		for(m=0;m<datoffsets;m++)
			if(msg.hdr.offset==datoffset[m].old)
				break;
		if(m<datoffsets) {				/* another index pointed to this data */
			printf("duplicate index\n");
			msg.hdr.offset=datoffset[m].new;
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			smb_incmsgdat(&smb,datoffset[m].new,smb_getmsgdatlen(&msg),1); 
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		} else {
1054

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			if(!(smb.status.attr&SMB_HYPERALLOC))
				datoffset[datoffsets].old=msg.hdr.offset;

			fseek(smb.sdt_fp,msg.hdr.offset,SEEK_SET);

			m=smb_getmsgdatlen(&msg);
			if(m>16L*1024L*1024L) {
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				fprintf(stderr,"\n\7!Invalid data length (%lu)\n",m);