www.pudn.com > C中MODEM的开发.zip > RZ.C
#define VERSION "1.13 01-01-87"
#define PUBDIR "/usr/spool/uucppublic"
/*% cc -DNFGVMIN -DCRCTABLE -K -O -i % -o rz; size rz
*
* rz.c By Chuck Forsberg
*
* cc -O rz.c -o rz USG (3.0) Unix
* cc -O -DV7 rz.c -o rz Unix V7, BSD 2.8 - 4.3
*
* ln rz rb For either system
*
* ln rz /usr/bin/rzrmail For remote mail. Make this the
* login shell. rzrmail then calls
* rmail(1) to deliver mail.
*
* define CRCTABLE to use table driven CRC
*
* Unix is a trademark of Western Electric Company
*
* A program for Unix to receive files and commands from computers running
* Professional-YAM, PowerCom, YAM, IMP, or programs supporting XMODEM.
* rz uses Unix buffered input to reduce wasted CPU time.
*
* Iff the program is invoked by rzCOMMAND, output is piped to
* "COMMAND filename"
*
* Some systems (Venix, Coherent, Regulus) may not support tty raw mode
* read(2) the same way as Unix. ONEREAD must be defined to force one
* character reads for these systems. Added 7-01-84 CAF
*
* Alarm signal handling changed to work with 4.2 BSD 7-15-84 CAF
*
* NFGVMIN Added 1-13-85 CAF for PC-AT Xenix systems where c_cc[VMIN]
* doesn't seem to work (even though it compiles without error!).
*
* HOWMANY should be tuned for best performance
*
* USG UNIX (3.0) ioctl conventions courtesy Jeff Martin
*/
#define LOGFILE "/tmp/rzlog"
#define zperr vfile
#include
#include
#include
#include
FILE *popen();
#define OK 0
#define FALSE 0
#define TRUE 1
#define ERROR (-1)
/*
* Max value for HOWMANY is 255.
* A larger value reduces system overhead but may evoke kernel bugs.
* 133 corresponds to a XMODEM/CRC sector
*/
#ifndef HOWMANY
#define HOWMANY 133
#endif
int Zmodem=0; /* ZMODEM protocol requested */
int Nozmodem = 0; /* If invoked as "rb" */
unsigned Baudrate;
#include "rbsb.c" /* most of the system dependent stuff here */
char *substr();
FILE *fout;
/*
* Routine to calculate the free bytes on the current file system
* ~0 means many free bytes (unknown)
*/
long getfree()
{
return(~0L); /* many free bytes ... */
}
/* Ward Christensen / CP/M parameters - Don't change these! */
#define ENQ 005
#define CAN ('X'&037)
#define XOFF ('s'&037)
#define XON ('q'&037)
#define SOH 1
#define STX 2
#define EOT 4
#define ACK 6
#define NAK 025
#define CPMEOF 032
#define WANTCRC 0103 /* send C not NAK to get crc not checksum */
#define TIMEOUT (-2)
#define RCDO (-3)
#define ERRORMAX 5
#define RETRYMAX 5
#define WCEOT (-10)
#define SECSIZ 128 /* cp/m's Magic Number record size */
#define PATHLEN 257 /* ready for 4.2 bsd ? */
#define KSIZE 1024 /* record size with k option */
#define UNIXFILE 0x8000 /* happens to the the S_IFREG file mask bit for stat */
int Lastrx;
int Crcflg;
int Firstsec;
int Eofseen; /* indicates cpm eof (^Z) has been received */
int errors;
int Restricted=0; /* restricted; no /.. or ../ in filenames */
#ifdef ONEREAD
/* Sorry, Regulus and some others don't work right in raw mode! */
int Readnum = 1; /* Number of bytes to ask for in read() from modem */
#else
int Readnum = HOWMANY; /* Number of bytes to ask for in read() from modem */
#endif
#define DEFBYTL 2000000000L /* default rx file size */
long Bytesleft; /* number of bytes of incoming file left */
long Modtime; /* Unix style mod time for incoming file */
short Filemode; /* Unix style mode for incoming file */
char Pathname[PATHLEN];
char *Progname; /* the name by which we were called */
int Batch=0;
int Wcsmask=0377;
int Topipe=0;
int MakeLCPathname=TRUE; /* make received pathname lower case */
int Verbose=0;
int Quiet=0; /* overrides logic that would otherwise set verbose */
int Nflag = 0; /* Don't really transfer files */
int Rxbinary=FALSE; /* receive all files in bin mode */
int Rxascii=FALSE; /* receive files in ascii (translate) mode */
int Thisbinary; /* current file is to be received in bin mode */
int Blklen; /* record length of received packets */
char secbuf[KSIZE];
char linbuf[HOWMANY];
int Lleft=0; /* number of characters in linbuf */
time_t timep[2];
char Lzmanag; /* Local file management request */
char zconv; /* ZMODEM file conversion request */
char zmanag; /* ZMODEM file management request */
char ztrans; /* ZMODEM file transport request */
jmp_buf tohere; /* For the interrupt on RX timeout */
#include "zm.c"
int tryzhdrtype=ZRINIT; /* Header type to send corresponding to Last rx close */
alrm()
{
longjmp(tohere, -1);
}
/* called by signal interrupt or terminate to clean things up */
bibi(n)
{
if (Zmodem)
zmputs(Attn);
canit(); mode(0);
fprintf(stderr, "rz: caught signal %d; exiting", n);
exit(128+n);
}
main(argc, argv)
char *argv[];
{
register char *cp;
register npats;
char *virgin, **patts;
char *getenv();
int exitcode;
Rxtimeout = 100;
setbuf(stderr, NULL);
if ((cp=getenv("SHELL")) && (substr(cp, "rsh") || substr(cp, "rksh")))
Restricted=TRUE;
chkinvok(virgin=argv[0]); /* if called as [-]rzCOMMAND set flag */
npats = 0;
while (--argc) {
cp = *++argv;
if (*cp == '-') {
while( *++cp) {
switch(*cp) {
case '+':
Lzmanag = ZMAPND; break;
case '1':
iofd = 1; break;
case '7':
Wcsmask = 0177;
case 'a':
Rxascii=TRUE; break;
case 'b':
Rxbinary=TRUE; break;
case 'c':
Crcflg=TRUE; break;
case 'D':
Nflag = TRUE; break;
case 'p':
Lzmanag = ZMPROT; break;
case 'q':
Quiet=TRUE; Verbose=0; break;
case 't':
if (--argc < 1) {
usage();
}
Rxtimeout = atoi(*++argv);
if (Rxtimeout<10 || Rxtimeout>1000)
usage();
break;
case 'u':
MakeLCPathname=FALSE; break;
case 'v':
++Verbose; break;
default:
usage();
}
}
}
else if ( !npats && argc>0) {
if (argv[0][0]) {
npats=argc;
patts=argv;
}
}
}
if (npats > 1)
usage();
if (Verbose) {
if (freopen(LOGFILE, "a", stderr)==NULL) {
printf("Can't open log file %s\n",LOGFILE);
exit(0200);
}
setbuf(stderr, NULL);
fprintf(stderr, "argv[0]=%s Progname=%s\n", virgin, Progname);
}
if (fromcu() && !Quiet) {
if (Verbose == 0)
Verbose = 2;
}
mode(1);
if (signal(SIGINT, bibi) == SIG_IGN) {
signal(SIGINT, SIG_IGN); signal(SIGKILL, SIG_IGN);
}
else {
signal(SIGINT, bibi); signal(SIGKILL, bibi);
}
if (wcreceive(npats, patts)==ERROR) {
exitcode=0200;
canit();
}
mode(0);
if (exitcode && !Zmodem) /* bellow again with all thy might. */
canit();
exit(exitcode);
}
usage()
{
fprintf(stderr,"%s %s for %s by Chuck Forsberg\n",
Progname, VERSION, OS);
fprintf(stderr,"Usage: rz [-1abuv] (ZMODEM Batch)\n");
fprintf(stderr,"or rb [-1abuv] (YMODEM Batch)\n");
fprintf(stderr,"or rz [-1abcv] file (XMODEM or XMODEM-1k)\n");
fprintf(stderr," -1 For cu(1): Use fd 1 for input\n");
fprintf(stderr," -a ASCII transfer (strip CR)\n");
fprintf(stderr," -b Binary transfer for all files\n");
fprintf(stderr," -v Verbose more v's give more info\n");
fprintf(stderr," -c Use 16 bit CRC (XMODEM)\n");
exit(1);
}
/*
* Debugging information output interface routine
*/
/* VARARGS1 */
vfile(f, a, b, c)
register char *f;
{
if (Verbose > 1) {
fprintf(stderr, f, a, b, c);
fprintf(stderr, "\n");
}
}
/*
* Let's receive something already.
*/
char *rbmsg =
"%s ready. To begin transfer, type \"%s file ...\" to your modem program\r\n";
wcreceive(argc, argp)
char **argp;
{
register c;
if (Batch || argc==0) {
Crcflg=(Wcsmask==0377);
if ( !Quiet)
fprintf(stderr, rbmsg, Progname, Nozmodem?"sb":"sz");
if (c=tryz()) {
if (c == ZCOMPL)
return OK;
if (c == ERROR)
goto fubar;
c = rzfiles();
if (c)
goto fubar;
} else {
for (;;) {
if (wcrxpn(secbuf)== ERROR)
goto fubar;
if (secbuf[0]==0)
return OK;
if (procheader(secbuf) == ERROR)
goto fubar;
if (wcrx()==ERROR)
goto fubar;
}
}
} else {
Bytesleft = DEFBYTL; Filemode = 0; Modtime = 0L;
strcpy(Pathname, *argp);
checkpath(Pathname);
fprintf(stderr, "\nrz: ready to receive %s\r\n", Pathname);
if ((fout=fopen(Pathname, "w")) == NULL)
return ERROR;
if (wcrx()==ERROR)
goto fubar;
}
return OK;
fubar:
canit();
if (Topipe && fout) {
pclose(fout); return ERROR;
}
if (fout)
fclose(fout);
if (Restricted) {
unlink(Pathname);
fprintf(stderr, "\r\nrz: %s removed.\r\n", Pathname);
}
return ERROR;
}
/*
* Fetch a pathname from the other end as a C ctyle ASCIZ string.
* Length is indeterminate as long as less than Blklen
* A null string represents no more files (YMODEM)
*/
wcrxpn(rpn)
char *rpn; /* receive a pathname */
{
register c;
#ifdef NFGVMIN
readline(1);
#else
purgeline();
#endif
et_tu:
Firstsec=TRUE; Eofseen=FALSE;
sendline(Crcflg?WANTCRC:NAK);
Lleft=0; /* Do read next time ... */
while ((c = wcgetsec(rpn, 100)) != 0) {
log( "Pathname fetch returned %d\n", c);
if (c == WCEOT) {
sendline(ACK);
Lleft=0; /* Do read next time ... */
readline(1);
goto et_tu;
}
return ERROR;
}
sendline(ACK);
return OK;
}
/*
* Adapted from CMODEM13.C, written by
* Jack M. Wierda and Roderick W. Hart
*/
wcrx()
{
register int sectnum, sectcurr;
register char sendchar;
register char *p;
int cblklen; /* bytes to dump this block */
Firstsec=TRUE;sectnum=0; Eofseen=FALSE;
sendchar=Crcflg?WANTCRC:NAK;
for (;;) {
sendline(sendchar); /* send it now, we're ready! */
Lleft=0; /* Do read next time ... */
sectcurr=wcgetsec(secbuf, (sectnum&0177)?50:130);
report(sectcurr);
if (sectcurr==(sectnum+1 &Wcsmask)) {
sectnum++;
cblklen = Bytesleft>Blklen ? Blklen:Bytesleft;
if (putsec(secbuf, cblklen)==ERROR)
return ERROR;
if ((Bytesleft-=cblklen) < 0)
Bytesleft = 0;
sendchar=ACK;
}
else if (sectcurr==(sectnum&Wcsmask)) {
log( "Received dup Sector\n");
sendchar=ACK;
}
else if (sectcurr==WCEOT) {
if (closeit())
return ERROR;
sendline(ACK);
Lleft=0; /* Do read next time ... */
return OK;
}
else if (sectcurr==ERROR)
return ERROR;
else {
log( "Sync Error\n");
return ERROR;
}
}
}
/*
* Wcgetsec fetches a Ward Christensen type sector.
* Returns sector number encountered or ERROR if valid sector not received,
* or CAN CAN received
* or WCEOT if eot sector
* time is timeout for first char, set to 4 seconds thereafter
***************** NO ACK IS SENT IF SECTOR IS RECEIVED OK **************
* (Caller must do that when he is good and ready to get next sector)
*/
wcgetsec(rxbuf, maxtime)
char *rxbuf;
int maxtime;
{
register checksum, wcj, firstch;
register unsigned short oldcrc;
register char *p;
int sectcurr;
for (Lastrx=errors=0; errors=0; ) {
if ((firstch=readline(1)) < 0)
goto bilge;
oldcrc=updcrc(firstch, oldcrc);
checksum += (*p++ = firstch);
}
if ((firstch=readline(1)) < 0)
goto bilge;
if (Crcflg) {
oldcrc=updcrc(firstch, oldcrc);
if ((firstch=readline(1)) < 0)
goto bilge;
oldcrc=updcrc(firstch, oldcrc);
if (oldcrc & 0xFFFF)
log("CRC=0%o\n", oldcrc);
else {
Firstsec=FALSE;
return sectcurr;
}
}
else if (((checksum-firstch)&Wcsmask)==0) {
Firstsec=FALSE;
return sectcurr;
}
else
log( "Checksum Error\n");
}
else
log("Sector number garbled 0%o 0%o\n",
sectcurr, oldcrc);
}
/* make sure eot really is eot and not just mixmash */
#ifdef NFGVMIN
else if (firstch==EOT && readline(1)==TIMEOUT)
return WCEOT;
#else
else if (firstch==EOT && Lleft==0)
return WCEOT;
#endif
else if (firstch==CAN) {
if (Lastrx==CAN) {
log( "Sender CANcelled\n");
return ERROR;
} else {
Lastrx=CAN;
continue;
}
}
else if (firstch==TIMEOUT) {
if (Firstsec)
goto humbug;
bilge:
log( "Timeout\n");
}
else
log( "Got 0%o sector header\n", firstch);
humbug:
Lastrx=0;
while(readline(1)!=TIMEOUT)
;
if (Firstsec) {
sendline(Crcflg?WANTCRC:NAK);
Lleft=0; /* Do read next time ... */
} else {
maxtime=40; sendline(NAK);
Lleft=0; /* Do read next time ... */
}
}
/* try to stop the bubble machine. */
canit();
return ERROR;
}
/*
* This version of readline is reasoably well suited for
* reading many characters.
* (except, currently, for the Regulus version!)
*
* timeout is in tenths of seconds
*/
readline(timeout)
int timeout;
{
register n;
static char *cdq; /* pointer for removing chars from linbuf */
if (--Lleft >= 0) {
if (Verbose > 8) {
fprintf(stderr, "%02x ", *cdq&0377);
}
return (*cdq++ & Wcsmask);
}
n = timeout/10;
if (n < 2)
n = 3;
if (Verbose > 3)
fprintf(stderr, "Calling read: n=%d ", n);
if (setjmp(tohere)) {
#ifdef TIOCFLUSH
/* ioctl(iofd, TIOCFLUSH, 0); */
#endif
Lleft = 0;
if (Verbose>1)
fprintf(stderr, "Readline:TIMEOUT\n");
return TIMEOUT;
}
signal(SIGALRM, alrm); alarm(n);
Lleft=read(iofd, cdq=linbuf, Readnum);
alarm(0);
if (Verbose > 3) {
fprintf(stderr, "Read returned %d bytes\n", Lleft);
}
if (Lleft < 1)
return TIMEOUT;
--Lleft;
if (Verbose > 8) {
fprintf(stderr, "%02x ", *cdq&0377);
}
return (*cdq++ & Wcsmask);
}
/*
* Purge the modem input queue of all characters
*/
purgeline()
{
Lleft = 0;
#ifdef USG
ioctl(iofd, TCFLSH, 0);
#else
lseek(iofd, 0L, 2);
#endif
}
/*
* Process incoming file information header
*/
procheader(name)
char *name;
{
register char *openmode, *p, **pp;
/* set default parameters and overrides */
openmode = "w";
Thisbinary = Rxbinary || !Rxascii;
if (Lzmanag)
zmanag = Lzmanag;
/*
* Process ZMODEM remote file management requests
*/
if (!Rxbinary && zconv == ZCNL) /* Remote ASCII override */
Thisbinary = 0;
if (zconv == ZCBIN) /* Remote Binary override */
++Thisbinary;
else if (zmanag == ZMAPND)
openmode = "a";
/* ZMPROT check for existing file */
if (zmanag == ZMPROT && (fout=fopen(name, "r"))) {
fclose(fout); return ERROR;
}
Bytesleft = DEFBYTL; Filemode = 0; Modtime = 0L;
p = name + 1 + strlen(name);
if (*p) { /* file coming from Unix or DOS system */
sscanf(p, "%ld%lo%o", &Bytesleft, &Modtime, &Filemode);
if (Filemode & UNIXFILE)
++Thisbinary;
if (Verbose) {
fprintf(stderr, "Incoming: %s %ld %lo %o\n",
name, Bytesleft, Modtime, Filemode);
}
}
else { /* File coming from CP/M system */
for (p=name; *p; ++p) /* change / to _ */
if ( *p == '/')
*p = '_';
if ( *--p == '.') /* zap trailing period */
*p = 0;
}
if (!Zmodem && MakeLCPathname && !IsAnyLower(name))
uncaps(name);
if (Topipe) {
sprintf(Pathname, "%s %s", Progname+2, name);
if (Verbose)
fprintf(stderr, "Topipe: %s %s\n",
Pathname, Thisbinary?"BIN":"ASCII");
if ((fout=popen(Pathname, "w")) == NULL)
return ERROR;
} else {
strcpy(Pathname, name);
if (Verbose) {
fprintf(stderr, "Receiving %s %s %s\n",
name, Thisbinary?"BIN":"ASCII", openmode);
}
checkpath(name);
if (Nflag)
name = "/dev/null";
if ((fout=fopen(name, openmode)) == NULL)
return ERROR;
}
return OK;
}
/*
* Putsec writes the n characters of buf to receive file fout.
* If not in binary mode, carriage returns, and all characters
* starting with CPMEOF are discarded.
*/
putsec(buf, n)
char *buf;
register n;
{
register char *p;
if (Thisbinary) {
for (p=buf; --n>=0; )
putc( *p++, fout);
}
else {
if (Eofseen)
return OK;
for (p=buf; --n>=0; ++p ) {
if ( *p == '\r')
continue;
if (*p == CPMEOF) {
Eofseen=TRUE; return OK;
}
putc(*p ,fout);
}
}
return OK;
}
/*
* Send a character to modem. Small is beautiful.
*/
sendline(c)
{
char d;
d = c;
if (Verbose>4)
fprintf(stderr, "Sendline: %x\n", c);
write(1, &d, 1);
}
xsendline(c)
{
sendline(c);
}
flushmo() {}
/* make string s lower case */
uncaps(s)
register char *s;
{
for ( ; *s; ++s)
if (isupper(*s))
*s = tolower(*s);
}
/*
* IsAnyLower returns TRUE if string s has lower case letters.
*/
IsAnyLower(s)
register char *s;
{
for ( ; *s; ++s)
if (islower(*s))
return TRUE;
return FALSE;
}
/*
* substr(string, token) searches for token in string s
* returns pointer to token within string if found, NULL otherwise
*/
char *
substr(s, t)
register char *s,*t;
{
register char *ss,*tt;
/* search for first char of token */
for (ss=s; *s; s++)
if (*s == *t)
/* compare token with substring */
for (ss=s,tt=t; ;) {
if (*tt == 0)
return s;
if (*ss++ != *tt++)
break;
}
return NULL;
}
/*
* Log an error
*/
/*VARARGS1*/
log(s,p,u)
char *s, *p, *u;
{
if (!Verbose)
return;
fprintf(stderr, "error %d: ", errors);
fprintf(stderr, s, p, u);
}
/* send cancel string to get the other end to shut up */
canit()
{
static char canistr[] = {
24,24,24,24,24,24,24,24,24,24,8,8,8,8,8,8,8,8,8,8,0
};
printf(canistr);
Lleft=0; /* Do read next time ... */
fflush(stdout);
}
/*
* Return 1 iff stdout and stderr are different devices
* indicating this program operating with a modem on a
* different line
*/
fromcu()
{
struct stat a, b;
fstat(1, &a); fstat(2, &b);
return (a.st_rdev != b.st_rdev);
}
report(sct)
int sct;
{
if (Verbose>1)
fprintf(stderr,"%03d%c",sct,sct%10? ' ' : '\r');
}
/*
* If called as [-][dir/../]vrzCOMMAND set Verbose to 1
* If called as [-][dir/../]rzCOMMAND set the pipe flag
* If called as rb use YMODEM protocol
*/
chkinvok(s)
char *s;
{
register char *p;
p = s;
while (*p == '-')
s = ++p;
while (*p)
if (*p++ == '/')
s = p;
if (*s == 'v') {
Verbose=1; ++s;
}
Progname = s;
if (s[0]=='r' && s[1]=='b')
Nozmodem = TRUE;
if (s[2] && s[0]=='r' && s[1]=='b')
Topipe=TRUE;
if (s[2] && s[0]=='r' && s[1]=='z')
Topipe=TRUE;
}
/*
* Totalitarian Communist pathname processing
*/
checkpath(name)
char *name;
{
if (Restricted) {
if (fopen(name, "r") != NULL) {
canit();
fprintf(stderr, "\r\nrz: %s exists\n", name);
bibi();
}
/* restrict pathnames to current tree or uucppublic */
if ( substr(name, "../")
|| (name[0]== '/' && strncmp(name, PUBDIR, strlen(PUBDIR))) ) {
canit();
fprintf(stderr,"\r\nrz:\tSecurity Violation\r\n");
bibi();
}
}
}
/*
* Initialize for Zmodem receive attempt, try to activate Zmodem sender
* Handles ZSINIT frame
* Return ZFILE if Zmodem filename received, -1 on error,
* ZCOMPL if transaction finished, else 0
*/
tryz()
{
register c, n;
register cmdzack1flg;
if (Nozmodem) /* Check for "rb" program name */
return 0;
for (n=Zmodem?10:5; --n>=0; ) {
/* Set buffer length (0) and capability flags */
stohdr(0L);
#ifdef CANBREAK
Txhdr[ZF0] = CANFDX|CANOVIO|CANBRK;
#else
Txhdr[ZF0] = CANFDX|CANOVIO;
#endif
zshhdr(tryzhdrtype, Txhdr);
again:
switch (zgethdr(Rxhdr, 0)) {
case ZRQINIT:
continue;
case ZEOF:
continue;
case TIMEOUT:
continue;
case ZFILE:
zconv = Rxhdr[ZF0];
zmanag = Rxhdr[ZF1];
ztrans = Rxhdr[ZF2];
tryzhdrtype = ZRINIT;
if (zrdata(secbuf, KSIZE) == GOTCRCW)
return ZFILE;
zshhdr(ZNAK, Txhdr);
goto again;
case ZSINIT:
if (zrdata(Attn, ZATTNLEN) == GOTCRCW) {
zshhdr(ZACK, Txhdr);
goto again;
}
zshhdr(ZNAK, Txhdr);
goto again;
case ZFREECNT:
stohdr(getfree());
zshhdr(ZACK, Txhdr);
goto again;
case ZCOMMAND:
cmdzack1flg = Rxhdr[ZF0];
if (zrdata(secbuf, KSIZE) == GOTCRCW) {
if (cmdzack1flg & ZCACK1)
stohdr(0L);
else
stohdr((long)sys2(secbuf));
purgeline(); /* dump impatient questions */
do {
zshhdr(ZCOMPL, Txhdr);
}
while (++errors<10 && zgethdr(Rxhdr,1) != ZFIN);
ackbibi();
if (cmdzack1flg & ZCACK1)
exec2(secbuf);
return ZCOMPL;
}
zshhdr(ZNAK, Txhdr); goto again;
case ZCOMPL:
goto again;
default:
continue;
case ZFIN:
ackbibi(); return ZCOMPL;
case ZCAN:
return ERROR;
}
}
return 0;
}
/*
* Receive 1 or more files with ZMODEM protocol
*/
rzfiles()
{
register c;
for (;;) {
switch (c = rzfile()) {
case ZEOF:
case ZSKIP:
switch (tryz()) {
case ZCOMPL:
return OK;
default:
return ERROR;
case ZFILE:
break;
}
continue;
default:
return c;
case ERROR:
return ERROR;
}
}
}
/*
* Receive a file with ZMODEM protocol
* Assumes file name frame is in secbuf
*/
rzfile()
{
register c, n;
long rxbytes;
Eofseen=FALSE;
if (procheader(secbuf) == ERROR) {
return (tryzhdrtype = ZSKIP);
}
n = 10; rxbytes = 0l;
for (;;) {
stohdr(rxbytes);
zshhdr(ZRPOS, Txhdr);
nxthdr:
switch (c = zgethdr(Rxhdr, 0)) {
default:
vfile("rzfile: zgethdr returned %d", c);
return ERROR;
case ZNAK:
case TIMEOUT:
if ( --n < 0) {
vfile("rzfile: zgethdr returned %d", c);
return ERROR;
}
case ZFILE:
zrdata(secbuf, KSIZE);
continue;
case ZEOF:
if (rclhdr(Rxhdr) != rxbytes) {
continue;
}
if (closeit()) {
tryzhdrtype = ZFERR;
vfile("rzfile: closeit returned <> 0");
return ERROR;
}
vfile("rzfile: normal EOF");
return c;
case ERROR: /* Too much garbage in header search error */
if ( --n < 0) {
vfile("rzfile: zgethdr returned %d", c);
return ERROR;
}
zmputs(Attn);
continue;
case ZDATA:
if (rclhdr(Rxhdr) != rxbytes) {
if ( --n < 0) {
return ERROR;
}
zmputs(Attn); continue;
}
moredata:
switch (c = zrdata(secbuf, KSIZE)) {
case ZCAN:
vfile("rzfile: zgethdr returned %d", c);
return ERROR;
case ERROR: /* CRC error */
if ( --n < 0) {
vfile("rzfile: zgethdr returned %d", c);
return ERROR;
}
zmputs(Attn);
continue;
case TIMEOUT:
if ( --n < 0) {
vfile("rzfile: zgethdr returned %d", c);
return ERROR;
}
continue;
case GOTCRCW:
n = 10;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
stohdr(rxbytes);
zshhdr(ZACK, Txhdr);
goto nxthdr;
case GOTCRCQ:
n = 10;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
stohdr(rxbytes);
zshhdr(ZACK, Txhdr);
goto moredata;
case GOTCRCG:
n = 10;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
goto moredata;
case GOTCRCE:
n = 10;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
goto nxthdr;
}
}
}
}
/*
* Send a string to the modem, processing for \336 (sleep 1 sec)
* and \335 (break signal)
*/
zmputs(s)
char *s;
{
register c;
while (*s) {
switch (c = *s++) {
case '\336':
sleep(1); continue;
case '\335':
sendbrk(); continue;
default:
sendline(c);
}
}
}
/*
* Close the receive dataset, return OK or ERROR
*/
closeit()
{
if (Topipe) {
if (pclose(fout)) {
return ERROR;
}
return OK;
}
if (fclose(fout)==ERROR) {
fprintf(stderr, "file close ERROR\n");
return ERROR;
}
if (Modtime) {
timep[0] = time(NULL);
timep[1] = Modtime;
utime(Pathname, timep);
}
if (Filemode)
chmod(Pathname, (07777 & Filemode));
return OK;
}
/*
* Ack a ZFIN packet, let byegones be byegones
*/
ackbibi()
{
register n;
vfile("ackbibi:");
Readnum = 1;
stohdr(0L);
for (n=4; --n>=0; ) {
zshhdr(ZFIN, Txhdr);
for (;;) {
switch (readline(100)) {
case 'O':
readline(1); /* Discard 2nd 'O' */
/* ***** FALL THRU TO ***** */
case TIMEOUT:
vfile("ackbibi complete");
return;
default:
break;
}
}
}
}
/*
* Local console output simulation
*/
bttyout(c)
{
if (Verbose || fromcu())
putc(c, stderr);
}
/*
* Strip leading ! if present, do shell escape.
*/
sys2(s)
register char *s;
{
if (*s == '!')
++s;
return system(s);
}
/*
* Strip leading ! if present, do exec.
*/
exec2(s)
register char *s;
{
if (*s == '!')
++s;
mode(0);
execl("/bin/sh", "sh", "-c", s);
}