Path: utzoo!utgpu!water!watmath!uunet!lll-winken!pacbell!att!mtune!ethos!pcid!gizzmo!fthood!egray
From: egray@fthood.UUCP
Newsgroups: unix-pc.sources
Subject: xmodem v3.6 (2 of 3)
Message-ID: <6800078@fthood>
Date: 14 Jul 88 19:05:00 GMT
Lines: 1760
Nf-ID: #N:fthood:6800078:000:51200
Nf-From: fthood.UUCP!egray    Jul 14 14:05:00 1988


This is part 2 of 3 to Steve Grandi's xmodem v3.6 package

Emmet P. Gray				US Army, HQ III Corps & Fort Hood
...!uunet!uiucuxc!fthood!egray		Attn: AFZF-DE-ENV
					Directorate of Engineering & Housing
					Environmental Management Office
					Fort Hood, TX 76544-5057

-------------------------------------------------------------------------------
#! /bin/sh
# This is a shell archive, meaning:
# 1. Remove everything above the #! /bin/sh line.
# 2. Save the resulting text in a file.
# 3. Execute the file with /bin/sh (not csh) to create:
#	misc.c
#	receive.c
#	send.c
#	xmodem.c
#	xmodem.h
#	xmodem.1
# This archive created: Thu Jul 14 13:12:46 1988
export PATH; PATH=/bin:/usr/bin:$PATH
echo shar: "extracting 'misc.c'" '(4381 characters)'
if test -f 'misc.c'
then
	echo shar: "will not over-write existing file 'misc.c'"
else
sed 's/^X//' << \SHAR_EOF > 'misc.c'
X#include "xmodem.h"
X
X/*  Print Help Message  */
Xhelp()
X	{
X	fprintf(stderr, "\nUsage:  \n\txmodem ");
X	fprintf(stderr, "-[rb!rt!ra!sb!st!sa][options] filename\n");
X	fprintf(stderr, "\nMajor Commands --");
X#ifdef LOCAL
X	fprintf(stderr, "\n\tr  <-- Receive Binary");
X#else /* LOCAL */
X	fprintf(stderr, "\n\trb <-- Receive Binary");
X#endif /* LOCAL */
X	fprintf(stderr, "\n\trt <-- Receive Text");
X	fprintf(stderr, "\n\tra <-- Receive Apple macintosh text");
X#ifdef LOCAL
X	fprintf(stderr, "\n\ts  <-- Send Binary");
X#else /* LOCAL */
X	fprintf(stderr, "\n\tsb <-- Send Binary");
X#endif /* LOCAL */
X	fprintf(stderr, "\n\tst <-- Send Text");
X	fprintf(stderr, "\n\tsa <-- Send Apple macintosh text");
X	fprintf(stderr, "\nOptions --");
X	fprintf(stderr, "\n\ty  <-- Use YMODEM Batch Mode on transmit");
X	fprintf(stderr, "\n\tm  <-- Use MODEM7 Batch Mode on transmit");
X	fprintf(stderr, "\n\tk  <-- Use 1K packets on transmit");
X#ifdef LOCAL
X	fprintf(stderr, "\n\tc  <-- Select checksum mode on receive");
X#else /* LOCAL */
X	fprintf(stderr, "\n\tc  <-- Select CRC mode on receive");
X#endif /* LOCAL */
X	fprintf(stderr, "\n\tt  <-- Indicate a TOO BUSY Unix system");
X	fprintf(stderr, "\n\td  <-- Delete xmodem.log file before starting");
X	fprintf(stderr, "\n\tl  <-- (ell) Turn OFF Log File Entries");
X	fprintf(stderr, "\n\tx  <-- Include copious debugging information in log file");
X	fprintf(stderr, "\n");
X	}
X
X/* get type of transmission requested (text or binary) */
Xgettype(ichar)
Xchar ichar;
X	{
X	if (ichar == 't' || ichar == 'T')
X		return('t');
X	else if (ichar == 'b' || ichar == 'B')
X		return('b');
X	else if (ichar == 'a' || ichar == 'A')
X		return('a');
X	else
X		error("Invalid Send/Receive Parameter - not t or b", FALSE);
X	return('\0');
X	}
X
X/* return a string containing transmission type */
Xchar *
Xprtype(ichar)
Xchar ichar;
X	{
X	if (ichar == 't' || ichar == 'T')
X		return("text");
X	else if (ichar == 'b' || ichar == 'B')
X		return("binary");
X	else if (ichar == 'a' || ichar == 'A')
X		return("apple");
X	else
X		return("");
X	}
X
X/* print error message and exit; if mode == TRUE, restore normal tty modes */
Xerror(msg, mode)
Xchar *msg;
Xint mode;
X	{
X	if (mode)
X		restoremodes(TRUE);  /* put back normal tty modes */
X	fprintf(stderr, "\r\n%s\n", msg);
X	if ((LOGFLAG || DEBUG) && (LOGFP != NULL))
X		{   
X		fprintf(LOGFP, "XMODEM Fatal Error:  %s\n", msg);
X	    	fclose(LOGFP);
X		}
X	exit(-1);
X	}
X
X
X/* Construct a proper (i.e. pretty) sector count for messages */
X
Xchar
X*sectdisp(recvsectcnt, bufsize, plus1)
Xlong recvsectcnt;
Xint bufsize, plus1;
X	{
X	static char string[20];
X	if (plus1)
X		recvsectcnt += (bufsize == 128) ? 1 : 8;
X	if (bufsize == 128 || recvsectcnt == 0)
X		sprintf (string, "%d", recvsectcnt);
X	else
X		sprintf (string, "%d-%d", recvsectcnt-7, recvsectcnt);
X	return(string);
X	}
X
X/* type out debugging info */
Xxmdebug(str)
Xchar *str;
X	{
X	if (DEBUG && (LOGFP != NULL))
X		fprintf(LOGFP,"DEBUG: '%s'\n",str);
X	}
X
X/* print elapsed time and rate of transfer in logfile */
X
Xint quant[] = { 60, 60, 24};	
Xchar sep[3][10] = { "second", "minute", "hour" };
X
Xprtime (numsect, seconds)
Xlong numsect;
Xtime_t seconds;
X
X{
X	register int i;
X	register int Seconds;
X	int nums[3];
X	int rate;
X
X	if (!LOGFLAG || numsect == 0)
X		return(0);
X
X	Seconds = (int)seconds;
X	Seconds = (Seconds > 0) ? Seconds : 0;
X
X	rate = (Seconds != 0) ? 128 * numsect/Seconds : 0;
X
X	for (i=0; i<3; i++) {
X		nums[i] = (Seconds % quant[i]);
X		Seconds /= quant[i];
X	}
X
X	fprintf (LOGFP, "%ld Sectors Transfered in ", numsect);
X
X	if (rate == 0)
X		fprintf (LOGFP, "0 seconds");
X	else
X		while (--i >= 0)
X			if (nums[i])
X				fprintf (LOGFP, "%d %s%c ", nums[i], &sep[i][0],
X					nums[i] == 1 ? ' ' : 's');
X	fprintf (LOGFP, "\n");
X
X	if (rate != 0)
X		fprintf (LOGFP, "Transfer Rate = %d Characters per Second\n", rate);
X
X	return(0);
X}
X
X/* Print elapsed time estimate */
X
Xprojtime (numsect, fd)
Xlong numsect;
XFILE *fd;
X	{
X	register int i;
X	register int seconds;
X	int nums[3];
X
X	if (numsect == 0)
X		return (0);
X
X/* constant below should really be 1280; reduced to 90% to account for time lost in overhead */
X
X	seconds = 1422 * numsect / ttyspeed + 1;
X
X	for (i=0; i<3; i++) {
X		nums[i] = (seconds % quant[i]);
X		seconds /= quant[i];
X	}
X
X	fprintf (fd, "Estimated transmission time ");
X
X	while (--i >= 0)
X		if (nums[i])
X			fprintf (fd, "%d %s%c ", nums[i], &sep[i][0],
X				nums[i] == 1 ? ' ' : 's');
X	fprintf (fd, "\n");
X	return (0);
X	}
SHAR_EOF
if test 4381 -ne "`wc -c < 'misc.c'`"
then
	echo shar: "error transmitting 'misc.c'" '(should have been 4381 characters)'
fi
fi
echo shar: "extracting 'receive.c'" '(12880 characters)'
if test -f 'receive.c'
then
	echo shar: "will not over-write existing file 'receive.c'"
else
sed 's/^X//' << \SHAR_EOF > 'receive.c'
X#include "xmodem.h"
X
X/**  receive a file  **/
X
X/* returns TRUE if in the midst of a batch transfer */
X/* returns FALSE if no more files are coming */
X
X/* This routine is one HUGE do-while loop with far to many indented levels.
X * I chose this route to facilitate error processing and to avoid GOTOs.
X * Given the troubles I've had keeping the nested IF statements straight,
X * I was probably mistaken...
X */
X
Xrfile(name)
Xchar *name;
X{
X
Xchar *sectdisp();
Xchar *cpm_unix();
Xchar *strcpy();
Xchar *ctime();
Xtime_t time();
X
Xint fd,     /* file descriptor for created file */
Xchecksum,   /* packet checksum */
Xfirstchar,  /* first character of a packet */
Xsectnum,    /* number of last received packet (modulo 128) */
Xsectcurr,   /* second byte of packet--should be packet number (mod 128) */
Xsectcomp,   /* third byte of packet--should be complement of sectcurr */
Xtmode,      /* text mode if true */
Xamode,      /* apple mode if true */
Xerrors,     /* count of errors for each packet */
Xsterrors,   /* count of errors during startup handshake */
Xerrorflag,  /* set true when packet (or first char of putative packet) is invalid */
Xfatalerror, /* set within main "read-packet" Do-While when bad error found */
Xinchecksum, /* incoming checksum or CRC */
Xexpsect,    /* expected number of sectors (YMODEM batch) */
Xfirstwait,  /* seconds to wait for first character in a packet */
Xbufsize;    /* packet size (128 or 1024) */
Xlong recvsectcnt;   /* running sector count (128 byte sectors) */
Xlong modtime;       /* Unix style file mod time from YMODEM header */
Xint filemode;       /* Unix style file mode from YMODEM header */
Xlong readbackup;    /* "backup" value for characters read in file */
Xtime_t timep[2];    /* used in setting mod time of received file */
Xchar *p;    /* generic pointer */
Xint bufctr; /* number of real chars in read packet */
Xunsigned char *nameptr; /* ptr in filename for MODEM7 protocol */
Xtime_t start;       /* starting time of transfer */
Xint openflag = FALSE;   /* is file open for writing? */
X
Xlogit("----\nXMODEM File Receive Function\n");
Xif (CRCMODE)
Xlogit("CRC mode requested\n");
X
XBATCH = FALSE;          /* don't know if really are in batch mode ! */
Xfatalerror = FALSE;
Xfirstwait = WAITFIRST;  /* For first packet, wait short time */
Xsectnum = errors = recvsectcnt = 0;
Xbufsize = 128;
Xmodtime = 0l; filemode = 0;
Xfilelength = 0l; fileread =0l; CHECKLENGTH = FALSE;
X
Xtmode = (XMITTYPE == 't') ? TRUE : FALSE;
Xamode = (XMITTYPE == 'a') ? TRUE : FALSE;
X
X/* start up transfer */
X
Xsterrors = 0;
Xflushin();         /* flush input queue */
X
Xif (CRCMODE)        
X{
X	sendbyte(CRCCHR);
X	if (LONGPACK && !MDM7BAT)
X		sendbyte(KCHR);
X}
Xelse
X	sendbyte(NAK);
X
X
Xdo                  /* start of MAIN Do-While loop to read packets */
X{   
X	errorflag = FALSE;
X	do              /* start by reading first byte in packet */
X	{
X		firstchar = readbyte(firstwait);
X	} 
X	while ((firstchar != SOH) 
X	    && (firstchar != STX) 
X	    && (firstchar != EOT) 
X	    && (firstchar != ACK || recvsectcnt > 0) 
X	    && (firstchar != TIMEOUT) 
X	    && (firstchar != CAN || recvsectcnt > 0));
X
X	if (firstchar == EOT)           /* check for REAL EOT */
X	{
X		flushin();
X		sendbyte(NAK);              /* NAK the EOT */
X		if ((firstchar = readbyte(3)) != EOT)   /* check next character */
X		{
X			logit("Spurious EOT detected; ignored\n");
X			if ((firstchar == SOH) || (firstchar == STX) ||
X			    (firstchar == ACK && recvsectcnt == 0) ||
X			    (firstchar == CAN && recvsectcnt == 0) ||
X			    (firstchar == TIMEOUT))
X				break;
X			else
X			{
X				firstchar = 0;
X				errorflag = TRUE;
X			}
X		}
X	}
X
X	if (firstchar == TIMEOUT)       /* timeout? */
X	{  
X		if (recvsectcnt > 0)
X			logitarg("Timeout on Sector %s\n", sectdisp(recvsectcnt,bufsize,1));
X		errorflag = TRUE;
X	}
X
X	if (firstchar == CAN)           /* bailing out? (only at beginning) */
X	{
X		if ((readbyte(3) & 0x7f) == CAN)
X			error("Reception canceled at user's request",TRUE);
X		else
X		{
X			errorflag = TRUE;
X			logit("Received single CAN character\n");
X		}
X	}
X
X	if (firstchar == ACK)           /* MODEM7 batch? (only at beginning) */
X	{
X		int i,c; 
X
X		logit("MODEM7 Batch Protocol\n");
X		nameptr = buff;
X		checksum = 0;
X
X		for (i=0; i<NAMSIZ; i++)
X		{
X			c = readbyte(3);
X
X			if (c == CAN)
X			{
X				if (readbyte(3) == CAN)
X					error("Program Canceled by User", TRUE);
X				else
X				{
X					logit("Received single CAN character in MODEM7 filename\n");
X					errorflag = TRUE;
X					break;
X				}
X			}
X
X			if (c == EOT && i == 0)
X			{
X				sendbyte(ACK);          /* acknowledge EOT */
X				logit("MODEM7 Batch Receive Complete\n");
X				return (FALSE);
X			}
X
X			if (c == TIMEOUT)
X			{
X				logit("Timeout waiting for MODEM7 filename character\n");
X				errorflag = TRUE;
X				break;
X			}
X
X			if (c == BAD_NAME)
X			{
X				logit("Error during MODEM7 filename transfer\n");
X				errorflag = TRUE;
X				break;
X			}
X
X			*nameptr++ = c;
X			checksum += c;
X			sendbyte(ACK);
X		}
X
X		if (!errorflag)
X		{
X			c = readbyte(3);
X			if (c == CTRLZ)     /* OK; end of string found */
X			{
X				sendbyte(checksum + CTRLZ);
X				if (readbyte(15) == ACK)     /* file name found! */
X				{
X					xmdebug("MODEM7 file name OK");
X					*nameptr = '\000';  /* unixify the file name */
X					name = cpm_unix(buff);
X					BATCH = TRUE;
X					logitarg("MODEM7 file name: %s\n", name);
X					errors = 0;     /* restart crc handshake */
X					sleep(2);       /* give other side a chance */
X				}
X				else
X				{
X					logit("Checksum error in MODEM7 filename\n");
X					errorflag = TRUE;
X				}
X			}
X			else
X			{
X				logit("Length error in MODEM7 filename\n");
X				errorflag = TRUE;
X			}
X		}
X	}
X
X
X	if (firstchar == SOH || firstchar == STX)  /* start reading packet */
X	{
X		bufsize = (firstchar == SOH) ? 128 : 1024;
X
X		if (recvsectcnt == 0)           /* 1st data packet, initialize */
X		{
X			if (bufsize == 1024)
X				logit("1K packet mode chosen\n");
X			start = time((time_t *) 0);
X			errors = 0;
X			firstwait = 5;
X		}
X
X		sectcurr = readbyte(3);
X		sectcomp = readbyte(3);
X		if ((sectcurr + sectcomp) == 0xff)  /* is packet number checksum correct? */
X		{  
X			if (sectcurr == ((sectnum+1) & 0xff))   /* is packet number correct? */
X			{  
X				if (DEBUG)
X					fprintf(LOGFP,"DEBUG: packet %d started\n", sectnum);
X
X				/* Read, process and calculate checksum for a buffer of data */
X
X				readbackup = fileread;
X				if (readbuf(bufsize, 1, tmode, amode, recvsectcnt, &checksum, &bufctr) != TIMEOUT) 
X				{
X
X					/* verify checksum or CRC */
X
X					if (CRCMODE) 
X					{
X						checksum &= 0xffff;
X						inchecksum = readbyte(3);  /* get 16-bit CRC */
X						inchecksum = (inchecksum<<8) | readbyte(3);
X					}
X
X					else
X						inchecksum = readbyte(3);  /* get simple 8-bit checksum */
X
X					if (inchecksum == checksum) /* good checksum, hence good packet */
X					{  
X						xmdebug("checksum ok");
X						errors = 0;
X						recvsectcnt += (bufsize == 128) ? 1 : 8;
X						sectnum = sectcurr; 
X
X						if (!openflag)      /* open output file if necessary */
X						{
X							openflag = TRUE;
X							if ((fd = creat(name, CREATMODE)) < 0)
X							{
X								sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X								error("Can't create file for receive", TRUE);
X							}
X							if (!BATCH)
X								logitarg("File Name: %s\n", name);
X						}
X
X						if (write(fd, (char *) buff, bufctr) != bufctr)
X						{
X							close(fd);
X							unlink(name);
X							error("File Write Error", TRUE);
X						}
X						else
X						{
X							flushin();          /* flush input */
X							sendbyte(ACK);      /* ACK the received packet */
X						}
X					}
X
X					/* Start handling various errors and special conditions */
X
X					else        /* bad checksum */
X					{  
X						logitarg("Checksum Error on Sector %s:  ", sectdisp(recvsectcnt,bufsize,1));
X						logitarg("sent=%x  ", inchecksum);
X						logitarg("recvd=%x\n", checksum);
X						fileread = readbackup;
X						errorflag = TRUE;
X					}
X				}
X
X				else    /* read timeout */
X				{
X					logitarg("Timeout while reading sector %s\n",sectdisp(recvsectcnt,bufsize,1));
X					fileread = readbackup;
X					errorflag = TRUE;
X				}
X			}
X
X			else        /* sector number is wrong OR Ymodem filename */
X			{ 
X				if (sectcurr == 0 && recvsectcnt == 0)  /* Ymodem file-name packet */
X				{
X					logit("YMODEM Batch Protocol\n");
X
X					/* Read and process a file-name packet */
X
X					if (readbuf(bufsize, 1, FALSE, FALSE, recvsectcnt, &checksum, &bufctr) != TIMEOUT) 
X					{
X
X						/* verify checksum or CRC */
X
X						if (CRCMODE) 
X						{
X							checksum &= 0xffff;
X							inchecksum = readbyte(3);  /* get 16-bit CRC */
X							inchecksum = (inchecksum<<8) | readbyte(3);
X						}
X
X						else
X							inchecksum = readbyte(3);  /* get simple 8-bit checksum */
X
X						if (inchecksum == checksum) /* good checksum, hence good filename */
X						{
X							xmdebug("checksum ok");
X							strcpy(name, (char *)buff);
X							expsect = ((buff[bufsize-1]<<8) | buff[bufsize-2]);
X							BATCH = TRUE;
X							YMDMBAT = TRUE;
X							if (strlen(name) == 0)  /* check for no more files */
X							{
X								flushin();          /* flush input */
X								sendbyte(ACK);      /* ACK the packet */
X								logit("YMODEM Batch Receive Complete\n");
X								return (FALSE);
X							}
X							unixify(name);       /* make filename canonical */
X
X							/* read rest of YMODEM header */
X							p = (char *)buff + strlen((char *)buff) + 1;
X							sscanf(p, "%ld%lo%o", &filelength, &modtime, &filemode);
X							logitarg("YMODEM file name: %s\n", name);
X							fileread = 0l;
X							if (filelength)
X							{
X								CHECKLENGTH = TRUE;
X								logitarg("YMODEM file size: %ld\n", filelength);
X							}
X							else if (expsect)
X								logitarg("YMODEM estimated file length %d sectors\n", expsect);
X							if (modtime)
X							{
X								logitarg("YMODEM file date: %s", ctime(&modtime));
X							}
X							if (filemode)
X								logitarg("YMODEM file mode: %o", filemode);
X
X							sendbyte(ACK);      /* ACK the packet */
X							firstwait = WAITFIRST;  /* reset to negotiate */
X						}
X
X						else                /* bad filename checksum */
X						{
X							logit("checksum error on filename sector\n");
X							errorflag = TRUE;
X						}
X					}
X					else
X					{
X						logit("Timeout while reading filename packet\n");
X						errorflag = TRUE;
X					}
X				}
X
X				else if (sectcurr == sectnum)   /* duplicate sector? */
X				{  
X					logitarg("Duplicate sector %s flushed\n", sectdisp(recvsectcnt,bufsize,0));
X					flushin();                  /* REALLY flush input */
X					while(readbyte(1) != TIMEOUT)
X						;
X					sendbyte(ACK);
X				}
X				else                /* no, real phase error */
X				{
X					logitarg("Phase Error - Expected packet is %s\n", sectdisp(recvsectcnt,bufsize,1));
X					errorflag = TRUE;
X					fatalerror = TRUE;
X				}
X			}
X		}
X
X		else        /* bad packet number checksum */
X		{  
X			logitarg("Header Sector Number Error on Sector %s\n", sectdisp(recvsectcnt, bufsize,1));
X			errorflag = TRUE;
X		}
X
X	}           /* END reading packet loop */
X
X	if (errorflag && !fatalerror && recvsectcnt != 0)   /* Handle errors */
X	{  
X		errors++;
X
X		if (errors >= ERRORMAX)     /* over error limit? */
X			fatalerror = TRUE;
X		else                        /* flush input and NAK the packet */
X		{
X			flushin();
X			while (readbyte(1) != TIMEOUT)  /* wait for line to settle */
X				;
X			sendbyte(NAK);
X		}
X	}
X
X	if (recvsectcnt == 0 && errorflag && firstchar != EOT) 	/* handle startup handshake */
X	{
X		sterrors++;
X
X		if (sterrors >= STERRORMAX)
X			fatalerror = TRUE;
X
X		else if (CRCMODE && sterrors == CRCSWMAX && !YMDMBAT)
X		{
X			CRCMODE = FALSE;
X			logit("Sender not accepting CRC request, changing to checksum\n");
X			sendbyte(NAK);
X		}
X
X		else if (!CRCMODE && sterrors == CRCSWMAX && !YMDMBAT)
X		{
X			CRCMODE = TRUE;
X			logit("Sender not accepting checksum request, changing to CRC\n");
X			sendbyte(CRCCHR);
X			if (LONGPACK && !MDM7BAT)
X				sendbyte(KCHR);
X		}
X
X		else if (CRCMODE)
X			{
X			sendbyte(CRCCHR);
X			if (LONGPACK && !MDM7BAT)
X				sendbyte(KCHR);
X			}
X
X		else
X			sendbyte(NAK);
X	}
X}
Xwhile ((firstchar != EOT) && !fatalerror);   /* end of MAIN Do-While */
X
Xif ((firstchar == EOT) && !fatalerror)  /* normal exit? */
X{
X	if (openflag)       /* close the file */
X		close(fd);
X	sendbyte(ACK);      /* ACK the EOT */
X	logit("Receive Complete\n");
X	prtime (recvsectcnt, time((time_t *) 0) - start);
X
X	if (openflag && modtime)   /* set file modification time */
X	{
X		timep[0] = time((time_t *) 0);
X		timep[1] = modtime;
X		utime(name, timep);
X	}
X
X	if (BATCH)          /* send appropriate return code */
X		return(TRUE);
X	else
X		return(FALSE);
X}
Xelse                /* no, error exit */
X{ 
X	if (openflag)
X	{
X		sendbyte(CAN); sendbyte(CAN); sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X		close(fd);
X		unlink(name);
X		error("ABORTED -- Too Many Errors--deleting file", TRUE);
X	}
X	else if (recvsectcnt != 0)
X		error("ABORTED -- Too Many Errors", TRUE);
X	else
X		error("ABORTED -- Remote system is not responding", TRUE);
X}
Xreturn(FALSE);
X
X}
SHAR_EOF
if test 12880 -ne "`wc -c < 'receive.c'`"
then
	echo shar: "error transmitting 'receive.c'" '(should have been 12880 characters)'
fi
fi
echo shar: "extracting 'send.c'" '(9886 characters)'
if test -f 'send.c'
then
	echo shar: "will not over-write existing file 'send.c'"
else
sed 's/^X//' << \SHAR_EOF > 'send.c'
X/**  send a file  **/
X
X/*
X * Operation of this routine depends on on MDM7BAT and YMDMBAT flags.
X *
X * If "name" is NULL; close out the BATCH send.
X */
X
X#include "xmodem.h"
X
Xsfile(name)
Xchar *name;
X	{
X
X	char *sectdisp();
X	time_t time();
X	char *strcpy();
X	char *unix_cpm();
X	char *cpmify();
X	long countnl();
X
X	extern unsigned short crctab[1<<B];	/* CRC-16 constant values, see getput.c */
X
X	register int bufctr, 		/* array index for data buffer */
X	sectnum;			/* packet number for packet header */
X
X	register unsigned short checksum; 	/* checksum/crc */
X
X	char blockbuf[BBUFSIZ+6];	/* holds packet as it is constructed */
X
X	struct stat filestatbuf;	/* file status info */
X
X	int fd, 		/* file descriptor for file being transmitted */
X	attempts,		/* number of attempts made to transmit a packet */
X	nlflag, 		/* flag that we have to send a LF in next packet */
X	sendfin, 		/* flag that we are sending the last packet */
X	closeout,		/* flag that we are closing out batch send */
X	startup,		/* flag that we are starting batch send */
X	tmode,			/* TRUE for text mode */
X	amode,			/* TRUE for apple mode */
X	filepack,		/* TRUE when sending first packet */
X	buf1024,		/* TRUE when sending 1K packets */
X	bbufcnt,		/* array index for packet */
X	firstchar,		/* first character in protocol transaction */
X	bufsize,		/* packet size (128 or 1024) */
X	sendresp;  		/* response char to sent block received from remote*/
X	long sentsect;		/* count of 128 byte sectors actually sent */
X	long expsect;		/* count of 128 byte sectors expected to be sent */
X	time_t start;		/* starting time of transfer */
X	char c;
X
X	nbchr = 0;  /* clear buffered read char count */
X
X	CRCMODE = FALSE;	/* Receiver determines use of crc or checksum */
X
X	buf1024 = LONGPACK;	/* set packet size flag to command line switch */
X
X	closeout = FALSE; startup = TRUE; filepack = FALSE;	/* indicate state of batch transfer */
X
X	tmode = (XMITTYPE == 't') ? TRUE : FALSE;	/* set text mode */
X	amode = (XMITTYPE == 'a') ? TRUE : FALSE;	/* set apple mode */
X
X	/* Check on NULL file name */
X	if (strcmp(name,"") == 0)
X		{
X		if (BATCH)
X			closeout = TRUE;
X		else
X			{
X			sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X			error("NULL file name in send", TRUE);
X			}
X		}
X
X	if (!closeout)		/* Are we closing down batch? */
X		{			/* no; let's send a file */
X		logit("----\nXMODEM Send Function\n");
X
X		if ((fd = open(name, 0)) < 0)	
X			{  
X			sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X     	   		error("Can't open file for send", TRUE);
X			}
X	
X		stat(name, &filestatbuf);  /* get file status bytes */
X		if (tmode)		   /* count up NLs */
X			filestatbuf.st_size += countnl(fd);
X		expsect = (filestatbuf.st_size/128) + 1;
X	
X		if (LOGFLAG)
X			{   
X		    	fprintf(LOGFP, "File Name: %s\n", name);
X		  	fprintf(LOGFP,"File Size %ldK, %ld Records, %ld Bytes\n",
X		  	  (filestatbuf.st_size/1024)+1, expsect, filestatbuf.st_size);
X			projtime(expsect, LOGFP);
X			}
X		}
X	else
X		{
X		logit("----\nXMODEM Send Function\n");
X		logit("Closing down Batch Transmission\n");
X		}
X
X
X	bufsize = buf1024 ? 1024 : 128;		/* set sector size */
X	if (buf1024 && !closeout)
X		logit("1K packet mode chosen\n");
X
X        sendfin = nlflag = FALSE;
X  	attempts = 0;
X
X	/* wait for and read startup character */
Xrestart:
X	do
X		{
X		while (((firstchar=readbyte(1)) != NAK) && (firstchar != CRCCHR) && (firstchar != CAN))
X			if (++attempts > NAKMAX)
X				{
X				if (MDM7BAT && startup)
X					{
X					sendbyte(ACK); sendbyte(EOT);
X					}
X				error("Remote System Not Responding", TRUE);
X				}
X
X		if ((firstchar & 0x7f) == CAN)
X			if (readbyte(3) == CAN)
X				error("Send cancelled at user's request",TRUE);
X
X		if (firstchar == CRCCHR)
X			{
X			CRCMODE = TRUE;
X			if (!closeout)
X				logit("CRC mode requested\n");
X			if (readbyte(1) == KCHR)
X				{
X				buf1024 = TRUE;
X				logit("Receiver invoked 1K packet mode\n");
X				}
X			}
X		}
X	while (firstchar != NAK && firstchar != CRCCHR);
X
X	if (MDM7BAT && closeout)	/* close out MODEM7 batch */
X		{
X		sendbyte(ACK); sendbyte (EOT);
X		flushin(); readbyte(2); 	/* flush junk */
X		return;
X		}
X
X	if (MDM7BAT && startup)		/* send MODEM7 file name */
X		{
X		if (send_name(unix_cpm(name)) == -1)
X			{
X			attempts = 0;
X			goto restart;
X			}
X		startup = FALSE;
X		attempts = 0;
X		goto restart;
X		}
X
X	sectnum = 1;
X
X	if (YMDMBAT)	/* Fudge for YMODEM transfer (to send name packet) */
X		{
X		sectnum = 0;
X		bufsize = 128;
X		filepack = TRUE;
X		}
X
X	attempts = sentsect = 0;
X	start = time((time_t *) 0);
X
X        do 			/* outer packet building/sending loop; loop till whole file is sent */
X		{   
X
X		if (closeout && YMDMBAT && sectnum == 1)	/* close out YMODEM */
X			return;
X
X		if (YMDMBAT && sectnum == 1)			/* get set to send YMODEM data packets */
X			{
X			bufsize = buf1024 ? 1024 : 128;
X
X			do		/* establish handshaking again */
X				{
X				while (((firstchar=readbyte(2)) != CRCCHR) && (firstchar != NAK) && (firstchar != CAN))
X					if (++attempts > ERRORMAX)
X						error("YMODEM protocol botch, C expected", TRUE);
X				if ((firstchar&0x7f) == CAN)
X					if (readbyte(3) == CAN)
X						error("Send cancelled at User's request", TRUE);
X				}
X			while ((firstchar != CRCCHR) && (firstchar != NAK));
X
X			attempts = 0;
X			}
X
X		if ((bufsize == 1024) && (attempts > KSWMAX))
X			{
X			logit("Reducing packet size to 128 due to excessive errors\n");
X			bufsize = 128;
X			}
X
X		if ((bufsize == 1024) && ((expsect - sentsect) < 8))
X			{
X			logit("Reducing packet size to 128 for tail end of file\n");
X			bufsize = 128;
X			}
X
X		if (sectnum > 0)	/* data packet */
X			{
X			for (bufctr=0; bufctr < bufsize;)
X	    			{
X				if (nlflag)
X	       	 			{  
X					buff[bufctr++] = LF;  /* leftover newline */
X	       	    			nlflag = FALSE;
X	        			}
X				if (getbyte(fd, &c) == EOF)
X					{ 
X					sendfin = TRUE;  /* this is the last sector */
X		   			if (!bufctr)  /* if EOF on sector boundary */
X		      				break;  /* avoid sending extra sector */
X		      			buff[bufctr++] = CTRLZ;  /* pad with Ctrl-Z for CP/M EOF (even do for binary files) */
X		   			continue;
X		      			}
X	
X				if (tmode && c == LF)  /* text mode & Unix newline? */
X		    			{
X					buff[bufctr++] = CR;  /* insert carriage return */
X			     		if (bufctr < bufsize)
X		                		buff[bufctr++] = LF;  /* insert LF */
X		 	      		else
X			        		nlflag = TRUE;  /* insert on next sector */
X		   			}	
X				else if (amode && c == LF)   /* Apple mode & Unix newline? */
X					buff[bufctr++] = CR; /* substitute CR */
X				else
X					buff[bufctr++] = c;  /* copy the char without change */
X		    		}
X
X	    		if (!bufctr)  /* if EOF on sector boundary */
X   	       			break;  /* avoid sending empty sector */
X			}	
X
X		else		/* YMODEM filename packet */
X			{
X			for (bufctr=0; bufctr<bufsize; bufctr++)  /* zero packet */
X				buff[bufctr]=0;
X			if (!closeout)
X				{
X				strcpy((char *)buff, cpmify(name));
X				
X					/* put in file name, length, mode */
X					{
X					register char *p;
X					p = (char *)buff + strlen(name) + 1;
X					sprintf(p, "%lu %lo %o", filestatbuf.st_size, 
X					  filestatbuf.st_mtime, filestatbuf.st_mode);
X					if (DEBUG)
X						fprintf(LOGFP, "DEBUG: YMODEM header information: %s\n", p);
X					}
X				buff[bufsize-2]	= (expsect & 0xff);        /* put in KMD kludge information */
X				buff[bufsize-1] = ((expsect >> 8) & 0xff);
X				}
X			}
X
X		bbufcnt = 0;		/* start building block to be sent */
X		blockbuf[bbufcnt++] = (bufsize == 1024) ? STX : SOH;    /* start of packet char */
X		blockbuf[bbufcnt++] = sectnum;	    /* current sector # */
X		blockbuf[bbufcnt++] = ~sectnum;   /* and its complement */
X
X               	checksum = 0;  /* initialize checksum */
X               	for (bufctr=0; bufctr < bufsize; bufctr++)
X       			{
X			blockbuf[bbufcnt++] = buff[bufctr];
X
X			if (CRCMODE)
X				checksum = (checksum<<B) ^ crctab[(checksum>>(W-B)) ^ buff[bufctr]];
X
X			else
X               			checksum = ((checksum+buff[bufctr]) & 0xff);
X         		}
X
X		if (CRCMODE)		/* put in CRC */
X			{
X			checksum &= 0xffff;
X			blockbuf[bbufcnt++] = ((checksum >> 8) & 0xff);
X			blockbuf[bbufcnt++] = (checksum & 0xff);
X			}
X		else			/* put in checksum */
X			blockbuf[bbufcnt++] = checksum;
X
X            	attempts = 0;
X	
X            	do				/* inner packet loop */
X            		{
X
X			writebuf(blockbuf, bbufcnt);	/* write the block */
X			flushin();                      /* purge anything in input queue */
X
X			if (DEBUG)
X				fprintf (LOGFP, "DEBUG: %d byte Packet %02xh (%02xh) sent, checksum %02xh %02xh\n", 
X				bbufcnt, blockbuf[1]&0xff, blockbuf[2]&0xff, blockbuf[bufsize+3]&0xff, blockbuf[bufsize+4]&0xff);
X
X                	attempts++;
X			sendresp = readbyte(10);  /* get response from remote */
X
X			if (sendresp != ACK)
X		   		{
X				if (sendresp == TIMEOUT)
X					{
X		   			logitarg("Timeout on sector %s\n",sectdisp(sentsect,bufsize,1));
X					}
X				else if (sendresp == NAK)
X					{
X		   			logitarg("NAK on sector %s\n",sectdisp(sentsect,bufsize,1));
X					}
X				else
X					{
X		   			logitarg("Non-ACK on sector %s\n",sectdisp(sentsect,bufsize,1));
X					}
X		   		}
X            		}
X			while((sendresp != ACK) && (attempts < ERRORMAX));	/* close of inner loop */
X
X       		sectnum++;  /* increment to next sector number */
X		if (!filepack)
X			sentsect += (bufsize == 128) ? 1 : 8;
X		filepack = FALSE;
X    		}
X		while (!sendfin && ( attempts < ERRORMAX));	/* end of outer loop */
X
X	if (attempts >= ERRORMAX)
X		{
X		sendbyte(CAN); sendbyte(CAN); sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X		error ("Too many errors in transmission", TRUE);
X		}
X
X    	attempts = 0;
X    	sendbyte(EOT);  /* send 1st EOT to close down transfer */
X	
X    	while ((readbyte(15) != ACK) && (attempts++ < EOTMAX)) 	/* wait for ACK of EOT */
X		{
X		if (attempts > 1)
X			logitarg("EOT not ACKed, try %d\n", attempts);
X	   	sendbyte(EOT);
X		}
X
X    	if (attempts >= RETRYMAX)
X	   	error("Remote System Not Responding on Completion", TRUE);
X
X    	close(fd);
X
X    	logit("Send Complete\n");
X	prtime(sentsect, time((time_t *) 0) - start);
X	}
SHAR_EOF
if test 9886 -ne "`wc -c < 'send.c'`"
then
	echo shar: "error transmitting 'send.c'" '(should have been 9886 characters)'
fi
fi
echo shar: "extracting 'xmodem.c'" '(8408 characters)'
if test -f 'xmodem.c'
then
	echo shar: "will not over-write existing file 'xmodem.c'"
else
sed 's/^X//' << \SHAR_EOF > 'xmodem.c'
X/*
X *  XMODEM -- Implements the Christensen XMODEM protocol, 
X *            for packetized file up/downloading.    
X *
X *	See the README file for some notes on SYS V adaptations.
X *	The program has been successfully run on VAXes (4.3BSD) and SUN-3/4s
X *	(SunOS 3.x) against MEX-PC and ZCOMM/DSZ.
X *
X *  See the README and update.doc files for history and change notes.
X *
X *  Please send bug fixes, additions and comments to:
X *	{ihnp4,ncar}!noao!grandi   grandi@noao.arizona.edu
X */
X
X#include "xmodem.h"
X
Xmain(argc, argv)
Xint argc;
Xchar **argv;
X{
X	char *getenv();
X	FILE *fopen();
X	char *unix_cpm();
X	char *strcpy();
X	char *strcat();
X	char *prtype();
X	
X	char *fname = filename;		/* convenient place to stash file names */
X	char *logfile = "xmodem.log";	/* Name of LOG File */
X	
X	char *stamptime();		/* for timestamp */
X
X	char *defname = "xmodem.in";	/* default file name if none given */
X
X	struct stat filestatbuf;	/* file status info */
X
X	int index;
X	char flag;
X	long expsect;
X
X	/* initialize option flags */
X
X#ifdef NOCLOBBER
X	char ans[10];
X#endif /* NOCLOBBER */
X#ifdef LOCAL
X	XMITTYPE = 'b';		/* assume binary transfer */
X#else /* LOCAL */
X	XMITTYPE = 't';		/* assume text transfer */
X#endif /* LOCAL */
X	DEBUG = FALSE;		/* keep debugging info in log */
X	RECVFLAG = FALSE;	/* not receive */
X	SENDFLAG = FALSE;	/* not send either */
X	BATCH = FALSE;		/* nor batch */
X#ifdef LOCAL
X	CRCMODE = TRUE;		/* use crc-16 for now */
X#else /* LOCAL */
X	CRCMODE = FALSE;	/* use checksums for now */
X#endif /* LOCAL */
X	DELFLAG = FALSE;	/* don't delete old log file */
X#ifdef LOCAL
X	LOGFLAG = FALSE;	/* keep log */
X#else /* LOCAL */
X	LOGFLAG = TRUE;		/* keep log */
X#endif /* LOCAL */
X	LONGPACK = FALSE; 	/* do not use long packets on transmit */
X	MDM7BAT = FALSE;	/* no MODEM7 batch mode */
X	YMDMBAT = FALSE;	/* no YMODEM batch mode */
X	TOOBUSY = FALSE;	/* not too busy for sleeping in packet read */
X
X	fprintf(stderr, "XMODEM Version %d.%d", VERSION/10, VERSION%10);
X	fprintf(stderr, " -- UNIX-Microcomputer Remote File Transfer Facility\n");
X
X	if (argc == 1)
X		{
X		help();
X		exit(-1);
X		}
X
X	index = 0;		/* set index for flag loop */
X
X	while ((flag = argv[1][index++]) != '\0')
X	    switch (flag) {
X		case '-' : break;
X		case 'X' :
X		case 'x' : DEBUG = TRUE;  /* turn on debugging log */
X			   break;
X		case 'C' :
X#ifdef LOCAL
X		case 'c' : CRCMODE = FALSE; /* enable checksum on receive */
X#else /* LOCAL */
X		case 'c' : CRCMODE = TRUE; /* enable CRC on receive */
X#endif /* LOCAL */
X			   break;
X		case 'D' :
X		case 'd' : DELFLAG = TRUE;  /* delete log file */
X			   break;
X		case 'L' :
X#ifdef LOCAL
X		case 'l' : LOGFLAG = TRUE;  /* turn on log  */
X#else /* LOCAL */
X		case 'l' : LOGFLAG = FALSE;  /* turn off log  */
X#endif /* LOCAL */
X			   break;
X		case 'm' :
X		case 'M' : MDM7BAT = TRUE;  /* turn on MODEM7 batch protocol */
X			   BATCH   = TRUE;
X			   break;
X		case 'y' :
X		case 'Y' : YMDMBAT = TRUE;  /* turn on YMODEM batch protocol */
X			   BATCH   = TRUE;
X			   break;
X		case 'k' :
X		case 'K' : LONGPACK = TRUE;  /* use 1K packets on transmit */
X			   break;
X		case 't' :
X		case 'T' : TOOBUSY = TRUE;  /* turn off sleeping */
X			   break;
X		case 'R' :
X		case 'r' : RECVFLAG = TRUE;  /* receive file */
X#ifdef LOCAL
X				if (argv[1][index] == 'b' || argv[1][index] == 'B') {
X					index++;
X					XMITTYPE = 'b';
X					break;
X				}
X				if (argv[1][index] == 't' || argv[1][index] == 'T') {
X					index++;
X					XMITTYPE = 't';
X					break;
X				}
X				if (argv[1][index] == 'a' || argv[1][index] == 'A') {
X					index++;
X					XMITTYPE = 'a';
X					break;
X				}
X#else /* LOCAL */
X			   XMITTYPE = gettype(argv[1][index++]);  /* get t/b */
X#endif /* LOCAL */
X			   break;
X		case 'S' :
X		case 's' : SENDFLAG = TRUE;  /* send file */
X#ifdef LOCAL
X				if (argv[1][index] == 'b' || argv[1][index] == 'B') {
X					index++;
X					XMITTYPE = 'b';
X					break;
X				}
X				if (argv[1][index] == 't' || argv[1][index] == 'T') {
X					index++;
X					XMITTYPE = 't';
X					break;
X				}
X				if (argv[1][index] == 'a' || argv[1][index] == 'A') {
X					index++;
X					XMITTYPE = 'a';
X					break;
X				}
X#else /* LOCAL */
X			   XMITTYPE = gettype(argv[1][index++]);
X#endif /* LOCAL */
X			   break;
X		default  : fprintf(stderr, "Invalid Flag %c ignored\n", flag);
X			   break;
X	   }
X
X	if (DEBUG)
X		LOGFLAG = TRUE;
X
X	if (LOGFLAG)
X	   { 
X	     if ((fname = getenv("HOME")) == 0)	/* Get HOME variable */
X		error("Fatal - Can't get Environment!", FALSE);
X	     fname = strcat(fname, "/");
X	     fname = strcat(fname, logfile);
X	     if (!DELFLAG)
X		LOGFP = fopen(fname, "a");  /* append to LOG file */
X	     else
X		LOGFP = fopen(fname, "w");  /* new LOG file */
X	     if (!LOGFP)
X		error("Fatal - Can't Open Log File", FALSE);
X
X	     fprintf(LOGFP,"\n++++++++  %s", stamptime());
X	     fprintf(LOGFP,"XMODEM Version %d.%d\n", VERSION/10, VERSION%10);
X	     fprintf(LOGFP,"Command line: %s %s", argv[0], argv[1]);
X	     for (index=2; index<argc; ++index)
X		fprintf(LOGFP, " %s", argv[index]);
X	     fprintf(LOGFP, "\n");
X	   }
X
X	getspeed();		/* get tty-speed for time estimates */
X
X	if (RECVFLAG && SENDFLAG)
X		error("Fatal - Both Send and Receive Functions Specified", FALSE);
X
X	if (MDM7BAT && YMDMBAT)
X		error("Fatal - Both YMODEM and MODEM7 Batch Protocols Specified", FALSE);
X
X	if (!RECVFLAG && !SENDFLAG)
X		error("Fatal - Either Send or Receive Function must be chosen!",FALSE);
X	
X	if (SENDFLAG && argc==2)
X		error("Fatal - No file specified to send",FALSE);
X
X	if (RECVFLAG && argc==2)
X		{
X		/* assume we really want CRC-16 in batch, unless we specify MODEM7 mode */ 
X		CRCMODE = MDM7BAT ? FALSE : TRUE;
X		fprintf(stderr, "Ready for BATCH RECEIVE");
X		fprintf(stderr, " in %s mode\n", prtype(XMITTYPE));
X		fprintf(stderr, "Send several Control-X characters to cancel\n");
X		logit("Batch Receive Started");
X		logitarg(" in %s mode\n", prtype(XMITTYPE));
X		strcpy(fname, defname);
X		}
X
X	if (RECVFLAG && argc>2)
X		{
X		if(open(argv[2], 0) != -1)  /* check for overwriting */
X#ifdef NOCLOBBER
X			while(1) {
X				printf("File exists - overwrite (y/n)? ");
X				gets(ans);
X				if (ans[0] == 'n' || ans[0] == 'N')
X					exit(0);
X				if (ans[0] == 'y' || ans[0] == 'Y')
X					break;
X			}
X#endif /* NOCLOBBER */
X			{
X			logit("Warning -- Target File Exists and is Being Overwritten\n");
X#ifndef NOCLOBBER
X			fprintf(stderr, "Warning -- Target File Exists and is Being Overwritten\n");
X#endif /* NOCLOBBER */
X			}
X		fprintf(stderr, "Ready to RECEIVE File %s", argv[2]);
X		fprintf(stderr, " in %s mode\n", prtype(XMITTYPE));
X		fprintf(stderr, "Send several Control-X characters to cancel\n");
X		logitarg("Receiving in %s mode\n", prtype(XMITTYPE));
X		strcpy(fname,argv[2]);
X		}
X
X	if (RECVFLAG)
X		{  
X		setmodes();		/* set tty modes for transfer */
X
X		while(rfile(fname) != FALSE);  /* receive files */
X
X		flushin();
X		restoremodes(FALSE);	/* restore normal tty modes */
X
X		sleep(2);		/* give other side time to return to terminal mode */
X		exit(0);
X		}
X
X	if (SENDFLAG && BATCH) 
X		{
X		if (YMDMBAT)
X			{
X			fprintf(stderr, "Ready to YMODEM BATCH SEND");
X			fprintf(stderr, " in %s mode\n", prtype(XMITTYPE));
X			logit("YMODEM Batch Send Started");
X			logitarg(" in %s mode\n", prtype(XMITTYPE));
X			}
X		else if (MDM7BAT)
X			{
X			fprintf(stderr, "Ready to MODEM7 BATCH SEND");
X			fprintf(stderr, " in %s mode\n", prtype(XMITTYPE));
X			logit("MODEM7 Batch Send Started");
X			logitarg(" in %s mode\n", prtype(XMITTYPE));
X			}
X		fprintf(stderr, "Send several Control-X characters to cancel\n");
X
X		setmodes();
X		for (index=2; index<argc; index++) {
X			if (stat(argv[index], &filestatbuf) < 0) {
X				logitarg("\nFile %s not found\n", argv[index]);
X				continue;
X			}
X			sfile(argv[index]);
X		}
X		sfile("");
X		flushin();
X		restoremodes(FALSE);
X
X		logit("Batch Send Complete\n");
X		sleep(2);
X		exit (0);
X		}
X
X	if (SENDFLAG && !BATCH) 
X		{
X		if (stat(argv[2], &filestatbuf) < 0)
X			error("Can't find requested file", FALSE);
X		expsect = (filestatbuf.st_size/128)+1;
X			
X		fprintf(stderr, "File %s Ready to SEND", argv[2]);
X		fprintf(stderr, " in %s mode\n", prtype(XMITTYPE));
X		fprintf(stderr, "Estimated File Size %ldK, %ld Sectors, %ld Bytes\n",
X	    	  (filestatbuf.st_size/1024)+1, expsect,
X	  	  filestatbuf.st_size);
X		projtime(expsect, stdout);
X		fprintf(stderr, "Send several Control-X characters to cancel\n");
X		logitarg("Sending in %s mode\n", prtype(XMITTYPE));
X
X		setmodes();
X		sfile(argv[2]);
X		flushin();
X		restoremodes(FALSE);
X
X		sleep(2);
X		exit(0);
X		}
X}
SHAR_EOF
if test 8408 -ne "`wc -c < 'xmodem.c'`"
then
	echo shar: "error transmitting 'xmodem.c'" '(should have been 8408 characters)'
fi
fi
echo shar: "extracting 'xmodem.h'" '(3369 characters)'
if test -f 'xmodem.h'
then
	echo shar: "will not over-write existing file 'xmodem.h'"
else
sed 's/^X//' << \SHAR_EOF > 'xmodem.h'
X#include <ctype.h>
X#include <stdio.h>
X#include <sys/types.h>
X#include <sys/stat.h>
X#ifdef SYSV
X#include <time.h>
X#include <termio.h>
X#define rindex strrchr
X#define index strchr
X#else /* SYSV */
X#include <sys/time.h>
X#include <sgtty.h>
X#endif /* SYSV */
X#include <signal.h>
X
X/* define macros to print messages in log file */
X#define  logit(string) if(LOGFLAG)fprintf(LOGFP,string)
X#define  logitarg(string,argument) if(LOGFLAG)fprintf(LOGFP,string,argument)
X
X#define	     VERSION	36	/* Version Number */
X#define      FALSE      0
X#define      TRUE       1
X
X
X/*  ASCII Constants  */
X#define      SOH  	001 
X#define	     STX	002
X#define	     ETX	003
X#define      EOT	004
X#define	     ENQ	005
X#define      ACK  	006
X#define	     LF		012   /* Unix LF/NL */
X#define	     CR		015  
X#define      NAK  	025
X#define	     SYN	026
X#define	     CAN	030
X#define	     ESC	033
X
X/*  XMODEM Constants  */
X#define      TIMEOUT  	-1
X#define      ERRORMAX  	10    /* maximum errors tolerated while transferring a packet */
X#define      WAITFIRST  1     /* seconds between startup characters in read */
X#define      STERRORMAX	60    /* maximum "errors" tolerated in read startup */
X#define      CRCSWMAX	30    /* maximum time to try CRC mode before switching */
X#define      NAKMAX	120   /* maximum times to wait for initial NAK when sending */
X#define      RETRYMAX  	5     /* maximum retries to be made certain handshaking routines */
X#define      KSWMAX	5     /* maximum errors before switching to 128 byte packets */
X#define      EOTMAX	10    /* maximum times sender will send an EOT to end transfer */
X#define      SLEEPNUM	100   /* target number of characters to collect during sleepy time */
X#define	     BBUFSIZ	1024  /* buffer size */
X#define      NAMSIZ	11    /* length of a CP/M file name string */
X#define	     CTRLZ	032   /* CP/M EOF for text (usually!) */
X#define      CRCCHR	'C'   /* CRC request character */
X#define      KCHR	'K'   /* 1K block request character */
X#define      BAD_NAME	'u'   /* Bad filename indicator */
X
X#define      CREATMODE	0644  /* mode for created files */
X
X/* GLOBAL VARIABLES */
X
Xint ttyspeed;		/* tty speed (bits per second) */
Xunsigned char buff[BBUFSIZ];	/* buffer for data */
Xint nbchr;		/* number of chars read so far for buffered read */
Xlong filelength;	/* length specified in YMODEM header */
Xlong fileread;		/* characters actually read so far in file */
Xchar filename[256];	/* place to construct filenames */
XFILE *LOGFP;		/* descriptor for LOG file */
X
X/* option flags and state variables */
Xchar	XMITTYPE;	/* text or binary? */
Xint	DEBUG;		/* keep debugging info in log? */
Xint	RECVFLAG;	/* receive? */
Xint	SENDFLAG;	/* send? */
Xint	BATCH;		/* batch? (Now used as a state variable) */
Xint	CRCMODE;	/* CRC or checksums? */
Xint	DELFLAG;	/* don't delete old log file? */
Xint	LOGFLAG;	/* keep log? */
Xint	LONGPACK; 	/* do not use long packets on transmit? */
Xint	MDM7BAT;	/* MODEM7 batch protocol */
Xint	YMDMBAT;	/* YMODEM batch protocol */
Xint	TOOBUSY;	/* turn off sleeping in packet read routine */
Xint	CHECKLENGTH;	/* Are we truncating a file to a YMODEM length? */
X
X
X/*   CRC-16 constants.  From Usenet contribution by Mark G. Mendel, 
X     Network Systems Corp.  (ihnp4!umn-cs!hyper!mark)
X*/
X
X    /* the CRC polynomial. */
X#define	P	0x1021
X
X    /* number of bits in CRC */
X#define W	16
X
X    /* the number of bits per char */
X#define B	8
SHAR_EOF
if test 3369 -ne "`wc -c < 'xmodem.h'`"
then
	echo shar: "error transmitting 'xmodem.h'" '(should have been 3369 characters)'
fi
fi
echo shar: "extracting 'xmodem.1'" '(7948 characters)'
if test -f 'xmodem.1'
then
	echo shar: "will not over-write existing file 'xmodem.1'"
else
sed 's/^X//' << \SHAR_EOF > 'xmodem.1'
X.TH XMODEM LOCAL "April 14, 1988"
X.UC 4.2
X.SH NAME
Xxmodem \- Christensen protocol file transfer utility
X.SH SYNOPSIS
X.B xmodem
X[\fBst|sb|sa|rt|rb|ra\fR][\fBymkctdlx\fR]
X[file...]
X.br
X.SH DESCRIPTION
XThe
X.I xmodem
Xprogram implements the Christensen (XMODEM) file transfer
Xprotocol for moving files between 4.2/4.3BSD Unix systems and microcomputers.
XThe XMODEM/CRC protocol, the MODEM7 batch protocol, the XMODEM-1K
Xblock protocol and the YMODEM batch protocol are all supported by 
X.IR xmodem .
XFor details of the protocols,
Xsee the document edited by Chuck Forsberg titled
X.I
XXMODEM/YMODEM Protocol Reference.
X.sp
XOption Flags are case insensitive; the cluster of flags 
Xmay be preceded by an optional "-"
Xcharacter.
X.PP
X.SH PARAMETERS
XExactly one of the following must be selected:
X.TP
X.B rb  
XReceive Binary - files are placed on the Unix disk without conversion.
X.I Xmodem
Xwill silently destroy existing files of the same name.
X.TP
X.B rt  
XReceive Text - files are converted from the CP/M and MS-DOS
Xformat of CR-LF pairs to the Unix convention of newline 
Xcharacters only between lines.  
XNull bytes are ignored and bit 8 of each character is stripped (which makes 
XWordstar files much more readable).
XA CTRL-Z character is deemed to indicate the EOF location in the incoming
Xfile.
XThe resulting file
Xis acceptable to the Unix editors and compilers, and is usually slightly
Xsmaller than the original file.
X.I Xmodem
Xwill silently destroy existing files of the same name.
X.TP
X.B ra
XReceive Apple - same as rt save CR characters in the incoming file are 
Xtranslated into Unix newline characters.
X.TP
X.B sb  
XSend Binary - files are sent without conversion as they exist on the Unix disk.
X.TP
X.B st  
XSend Text - newline characters in the file are converted to CR-LF pairs
Xin accord with the CP/M and MS-DOS conventions for text files.  The file
X"grows" in this process.
X.TP
X.B sa  
XSend Apple - same as st save newline characters are converted into CR
Xcharacters in accord with Apple Macintosh conventions for text files.
X.PP
X.SH OPTIONS
X.TP
X.B y
XSelect the YMODEM batch protocol for sending files; a list of files specified
Xon the command line will be sent in sequence.  The YMODEM batch protocol is 
Xused automatically for file reception if the sending program requests it.
XIf this flag is specified for a batch receive, (\fIxmodem rty\fR, for example),
Xthe transfer will never attempt to switch from CRC to checksum mode.
X.TP
X.B m
XSelect the MODEM7 batch protocol for sending files; a list of files specified
Xon the command line will be sent in sequence.  The MODEM7 batch protocol is 
Xused automatically for file reception if the sending program requests it.
XIf this flag is specified for a batch receive, (\fIxmodem rbm\fR, for example),
Xthe transfer starts in checksum mode rather than CRC mode.
X.TP
X.B k
XSelect the XMODEM-1K file transfer mode for sending files. Use of 1K packets on
Xlow-error lines increases throughput.  
XHowever, over direct connections at 9600 bps to a busy host, 1K packets may
Xcause data overflows generating excessive retries.
X1K packets are automatically
Xused for file reception if the sending program requests it.
XIf this flag is specified with the YMODEM flag in a batch receive (\fIxmodem
Xrbyk\fR, for example), the program will attempt to use the "KMD/IMP" convention
Xto invoke 1K file transfers.
X.TP
X.B c   
XSelect the CRC-16 error-checking protocol on receive.  CRC mode is better at catching
Xtransmission errors that occur than the alternative checksum protocol.  
XCRC mode is automatically selected for file
Xtransmission if the receiving modem program requests it.
X.TP
X.B t
XIndicates the Unix system is Too Busy and 
X.I xmodem
Xshould fall back to a simpler I/O strategy than normal.
X.TP
X.B d   
XDelete the 
X.I xmodem.log
Xfile before file transfer is begun.
X.TP
X.B l   
XDo NOT write to the log file.  If logging is selected, a file
X.I xmodem.log 
Xwill be created (or appended to), with entries for significant events, errors
Xand retries.  This can be useful to see why things went wrong
Xwhen they do.
X.TP
X.B x
XToggle on debug mode.  If debug mode is selected, copious and possibly
Xuseful debugging information will be placed in 
X.IR xmodem.log .
X.SH "FILE NAMES"
XFiles transmitted using one of the batch modes
Xwill be stored on the remote machine under a CP/M-ified name (path names
Xstripped, limited
Xto eight characters plus a three character extension; ":" characters will
Xbe turned into "/" characters; all characters will be in monocase).  
XFiles received using one of the batch modes
Xwill be stored under their transmitted names (except that any "/" characters
Xin the file name will be converted into ":" characters, all upper-case
Xcharacters will be translated into lower case and trailing dots will be
Xexpunged).
X.PP
XWhen a batch receive is requested,
X.I xmodem
Xtakes a wait and see attitude and can adapt to either batch protocol or even
Xa classic XMODEM transfer (note that CRC-16 mode is automatically set under
Xthese circumstances unless the b flag is specified).
XIf a classic, "non-batch" XMODEM file reception takes place, 
Xthe received file is stored as
X.IR xmodem.in .
XFile names present on the command line for a batch receive are ignored.
X.SH NOTES
XWhile waiting for the beginning of a file transfer, 
X.I xmodem
Xtreats two CAN (CTRL-X) characters that are received within 3 seconds
Xas a request to abort.  CAN characters will not cause an abort if received
Xduring a file transfer.
X.PP
XIf 10 or more errors are detected during the transmission or reception of any
Xone packet, the transfer is aborted.
X.PP
XSqueezed, compressed or ARCed files must be transferred in binary mode, even if they
Xcontain text.
X.PP
XIf you use 
X.I xmodem
Xover a 
X.I rlogin
Xlink, you may have to use the form
X.IR "rlogin machine -8" .
X.PP
XIf an unexpected error occurs before a file is completely received, the
Xincomplete file is deleted.
X.PP
XFiles received using both binary and text mode in a YMODEM batch transfer 
Xwill be truncated
Xto the file size specified in the YMODEM header (extra CR characters in the
Xincoming file are correctly handled).  File sizes are included in
Xthe YMODEM header when sending both binary and text files.  Thus files
Xtransferred via YMODEM should preserve their exact length.
XFile modification times are set for received files if present in the YMODEM
Xheader; they are included in the headers for transmitted files.
X.PP
XThe "KMD/IMP" record count field in the YMODEM header is both set and read.
X.SH EXAMPLES
XTo receive a text file transmitted from a micro (using CRC-16
Xerror-checking) and store it under the
Xname 
X.IR file.name ,
Xuse the command line
X.RS
X.B "xmodem rtc file.name"
X.RE
XNote that if the transmitting program on the micro uses the 1K packet
Xprotocol or either batch protocol,
X.I xmodem
Xdetects this automatically and takes appropriate action.  Further
Xnote that if one of the batch protocols is used, the received file(s)
Xwill be stored under their own names and the name on the command line
X(if any) will be ignored.
X.PP
XTo send a set of text files to a microcomputer using 1K packets and the
XYMODEM batch protocol, use the command line
X.RS
X.B "xmodem styk *.txt"
X.RE
X.SH FILES
Xxmodem.log (if logging is enabled)
X.SH BUGS
XBatch mode could be smarter about bad file-names in the midst of a
Xbatch transmit/receive.
X.PP
XBatch mode could allow a mixture of binary and text files.
X.PP
XBare Carriage Return characters (i.e., those not immediately followed by a
XLine Feed character) are mishandled in a received file when using text mode.
XA file with ``overstruck'' lines will thus come out looking funny.
X.PP
XYMODEM header packets are only sent as 128 byte packets.  Thus VERY long file
Xnames will not be handled properly.
X.SH SEE ALSO
Xkermit(1)
X.SH AUTHOR
XSteve Grandi, National Optical Astronomy Observatories.  Based on
X.I xmodem
Xby Brian Kantor, University of California at San Diego.
XThis, in turn, was based on
X.I umodem
Xby Lauren Weinstein, Richard Conn and others.
SHAR_EOF
if test 7948 -ne "`wc -c < 'xmodem.1'`"
then
	echo shar: "error transmitting 'xmodem.1'" '(should have been 7948 characters)'
fi
fi
exit 0
#	End of shell archive