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- #define VERSION "sz 1.35 08-21-87"
- #define PUBDIR "/usr/spool/uucppublic"
-
- /*% cc -M0 -Ox -K -i -DNFGVMIN -DREADCHECK sz.c -lx -o sz; size sz
- *
- * sz.c By Chuck Forsberg
- *
- * cc -O sz.c -o sz USG (SYS III/V) Unix
- * cc -O -DSVR2 sz.c -o sz Sys V Release 2 with non-blocking input
- * Define to allow reverse channel checking
- * cc -O -DV7 sz.c -o sz Unix Version 7, 2.8 - 4.3 BSD
- *
- * cc -O -K -i -DNFGVMIN -DREADCHECK sz.c -lx -o sz Xenix
- *
- * ln sz sb **** All versions ****
- * ln sz sx **** All versions ****
- *
- *
- * ******* Some systems (Venix, Coherent, Regulus) do not *******
- * ******* support tty raw mode read(2) identically to *******
- * ******* Unix. ONEREAD must be defined to force one *******
- * ******* character reads for these systems. *******
- *
- * A program for Unix to send files and commands to computers running
- * Professional-YAM, PowerCom, YAM, IMP, or programs supporting Y/XMODEM.
- *
- * Sz uses buffered I/O to greatly reduce CPU time compared to UMODEM.
- *
- * USG UNIX (3.0) ioctl conventions courtesy Jeff Martin
- *
- * 1.34 implements tx backchannel garbage count and ZCRCW after ZRPOS
- * in accordance with the 7-31-87 ZMODEM Protocol Description
- */
-
-
- char *substr(), *getenv();
-
- #define LOGFILE "/tmp/szlog"
-
- #include <stdio.h>
- #include <signal.h>
- #include <setjmp.h>
- #include <ctype.h>
-
- #define PATHLEN 256
- #define OK 0
- #define FALSE 0
- #define TRUE 1
- #define ERROR (-1)
-
- #define HOWMANY 2
- int Zmodem=0; /* ZMODEM protocol requested */
- unsigned Baudrate;
- unsigned Txwindow; /* Control the size of the transmitted window */
- unsigned Txwspac; /* Spacing between zcrcq requests */
- unsigned Txwcnt; /* Counter used to space ack requests */
- long Lrxpos; /* Receiver's last reported offset */
- int Fromcu = 0; /* Were called from cu or yam */
- int errors;
- #include "rbsb.c" /* most of the system dependent stuff here */
-
- /*
- * Attention string to be executed by receiver to interrupt streaming data
- * when an error is detected. A pause (0336) may be needed before the
- * ^C (03) or after it.
- */
- #ifdef READCHECK
- char Myattn[] = { 0 };
- #else
- #ifdef USG
- char Myattn[] = { 03, 0336, 0 };
- #else
- char Myattn[] = { 0 };
- #endif
- #endif
-
- FILE *in;
-
- /* 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 WANTG 0107 /* Send G not NAK to get nonstop batch xmsn */
- #define TIMEOUT (-2)
- #define RCDO (-3)
- #define RETRYMAX 10
- #define SECSIZ 128 /* cp/m's Magic Number record size */
- #define KSIZE 1024
-
- char Lastrx;
- char Crcflg;
- int Wcsmask=0377;
- int Verbose=0;
- int Modem=0; /* MODEM - don't send pathnames */
- int Restricted=0; /* restricted; no /.. or ../ in filenames */
- int Quiet=0; /* overrides logic that would otherwise set verbose */
- int Ascii=0; /* Add CR's for brain damaged programs */
- int Fullname=0; /* transmit full pathname */
- int Unlinkafter=0; /* Unlink file after it is sent */
- int Dottoslash=0; /* Change foo.bar.baz to foo/bar/baz */
- int firstsec;
- int errcnt=0; /* number of files unreadable */
- int blklen=SECSIZ; /* length of transmitted records */
- int Optiong; /* Let it rip no wait for sector ACK's */
- int Noeofseen;
- int Totsecs; /* total number of sectors this file */
- char txbuf[KSIZE];
- int Filcnt=0; /* count of number of files opened */
- int Lfseen=0;
- unsigned Rxbuflen = 16384; /* Receiver's max buffer length */
- int Tframlen = 0; /* Override for tx frame length */
- int blkopt=0; /* Override value for zmodem blklen */
- int Rxflags = 0;
- long bytcnt;
- int Wantfcs32 = TRUE; /* want to send 32 bit FCS */
- char Lzconv; /* Local ZMODEM file conversion request */
- char Lzmanag; /* Local ZMODEM file management request */
- int Lskipnocor;
- char Lztrans;
- char zconv; /* ZMODEM file conversion request */
- char zmanag; /* ZMODEM file management request */
- char ztrans; /* ZMODEM file transport request */
- int Command; /* Send a command, then exit. */
- char *Cmdstr; /* Pointer to the command string */
- int Cmdtries = 11;
- int Cmdack1; /* Rx ACKs command, then do it */
- int Exitcode;
- int Testattn; /* Force receiver to send Attn, etc with qbf. */
- char *qbf="The quick brown fox jumped over the lazy dog's back 1234567890\r\n";
- long Lastread; /* Beginning offset of last buffer read */
- int Lastn; /* Count of last buffer read or -1 */
- int Dontread; /* Don't read the buffer, it's still there */
- long Lastsync; /* Last offset to which we got a ZRPOS */
- int Beenhereb4; /* How many times we've been ZRPOS'd same place */
-
- jmp_buf tohere; /* For the interrupt on RX timeout */
- jmp_buf intrjmp; /* For the interrupt on RX CAN */
-
- /* called by signal interrupt or terminate to clean things up */
- bibi(n)
- {
- canit(); fflush(stdout); mode(0);
- fprintf(stderr, "sz: caught signal %d; exiting\n", n);
- if (n == SIGQUIT)
- abort();
- exit(128+n);
- }
- /* Called when Zmodem gets an interrupt (^X) */
- onintr()
- {
- signal(SIGINT, SIG_IGN);
- longjmp(intrjmp, -1);
- }
-
-
- #define sendline(c) putchar(c & Wcsmask)
-
- #define xsendline(c) putchar(c)
-
- flushmo()
- {
- fflush(stdout);
- }
-
- int Zctlesc; /* Encode control characters */
- int Nozmodem = 0; /* If invoked as "sb" */
- char *Progname = "sz";
- int Zrwindow = 1400; /* RX window size (controls garbage count) */
- #include "zm.c"
-
-
- main(argc, argv)
- char *argv[];
- {
- register char *cp;
- register npats;
- int agcnt; char **agcv;
- char **patts;
- static char xXbuf[BUFSIZ];
-
- if ((cp = getenv("ZNULLS")) && *cp)
- Znulls = atoi(cp);
- if ((cp=getenv("SHELL")) && (substr(cp, "rsh") || substr(cp, "rksh")))
- Restricted=TRUE;
- chkinvok(argv[0]);
-
- Rxtimeout = 600;
- npats=0;
- if (argc<2)
- usage();
- setbuf(stdout, xXbuf);
- while (--argc) {
- cp = *++argv;
- if (*cp++ == '-' && *cp) {
- while ( *cp) {
- switch(*cp++) {
- case '+':
- Lzmanag = ZMAPND; break;
- case '1':
- iofd = 1; break;
- #ifdef CSTOPB
- case '2':
- Twostop = TRUE; break;
- #endif
- case '7':
- Wcsmask=0177; break;
- case 'a':
- Lzconv = ZCNL;
- Ascii = TRUE; break;
- case 'b':
- Lzconv = ZCBIN; break;
- case 'C':
- if (--argc < 1) {
- usage();
- }
- Cmdtries = atoi(*++argv);
- break;
- case 'i':
- Cmdack1 = ZCACK1;
- /* **** FALL THROUGH TO **** */
- case 'c':
- if (--argc != 1) {
- usage();
- }
- Command = TRUE;
- Cmdstr = *++argv;
- break;
- case 'd':
- ++Dottoslash;
- /* **** FALL THROUGH TO **** */
- case 'f':
- Fullname=TRUE; break;
- case 'e':
- Zctlesc = 1; break;
- case 'k':
- blklen=KSIZE; break;
- case 'L':
- if (--argc < 1) {
- usage();
- }
- blkopt = atoi(*++argv);
- if (blkopt<24 || blkopt>1024)
- usage();
- break;
- case 'l':
- if (--argc < 1) {
- usage();
- }
- Tframlen = atoi(*++argv);
- if (Tframlen<32 || Tframlen>1024)
- usage();
- break;
- case 'N':
- Lzmanag = ZMNEWL; break;
- case 'n':
- Lzmanag = ZMNEW; break;
- case 'o':
- Wantfcs32 = FALSE; break;
- case 'p':
- Lzmanag = ZMPROT; break;
- case 'r':
- Lzconv = ZCRESUM;
- case 'q':
- Quiet=TRUE; Verbose=0; break;
- case 't':
- if (--argc < 1) {
- usage();
- }
- Rxtimeout = atoi(*++argv);
- if (Rxtimeout<10 || Rxtimeout>1000)
- usage();
- break;
- case 'T':
- Testattn = TRUE; break;
- case 'u':
- ++Unlinkafter; break;
- case 'v':
- ++Verbose; break;
- case 'w':
- if (--argc < 1) {
- usage();
- }
- Txwindow = atoi(*++argv);
- if (Txwindow < 256)
- Txwindow = 256;
- Txwindow = (Txwindow/64) * 64;
- Txwspac = Txwindow/4;
- if (blkopt > Txwspac
- || (!blkopt && Txwspac < 1024))
- blkopt = Txwspac;
- break;
- case 'X':
- ++Modem; break;
- case 'Y':
- Lskipnocor = TRUE;
- /* **** FALLL THROUGH TO **** */
- case 'y':
- Lzmanag = ZMCLOB; break;
- default:
- usage();
- }
- }
- }
- else if ( !npats && argc>0) {
- if (argv[0][0]) {
- npats=argc;
- patts=argv;
- if ( !strcmp(*patts, "-"))
- iofd = 1;
- }
- }
- }
- if (npats < 1 && !Command)
- usage();
- if (Verbose) {
- if (freopen(LOGFILE, "a", stderr)==NULL) {
- printf("Can't open log file %s\n",LOGFILE);
- exit(0200);
- }
- setbuf(stderr, NULL);
- }
- if ((Fromcu=from_cu()) && !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 ( !Fromcu)
- signal(SIGQUIT, SIG_IGN);
- signal(SIGTERM, bibi);
-
- if ( !Modem) {
- if (!Nozmodem) {
- printf("rz\r"); fflush(stdout);
- }
- if (!Command && !Quiet && Verbose != 1) {
- fprintf(stderr, "%s: %d file%s requested:\r\n",
- Progname, npats, npats>1?"s":"");
- for ( agcnt=npats, agcv=patts; --agcnt>=0; ) {
- fprintf(stderr, "%s ", *agcv++);
- }
- fprintf(stderr, "\r\n");
- printf("\r\n\bSending in Batch Mode\r\n");
- }
- if (!Nozmodem) {
- stohdr(0L);
- if (Command)
- Txhdr[ZF0] = ZCOMMAND;
- zshhdr(ZRQINIT, Txhdr);
- }
- }
- fflush(stdout);
-
- if (Command) {
- if (getzrxinit()) {
- Exitcode=0200; canit();
- }
- else if (zsendcmd(Cmdstr, 1+strlen(Cmdstr))) {
- Exitcode=0200; canit();
- }
- } else if (wcsend(npats, patts)==ERROR) {
- Exitcode=0200;
- canit();
- }
- fflush(stdout);
- mode(0);
- exit((errcnt != 0) | Exitcode);
- /*NOTREACHED*/
- }
-
- wcsend(argc, argp)
- char *argp[];
- {
- register n;
-
- Crcflg=FALSE;
- firstsec=TRUE;
- bytcnt = -1;
- for (n=0; n<argc; ++n) {
- Totsecs = 0;
- if (wcs(argp[n])==ERROR)
- return ERROR;
- }
- Totsecs = 0;
- if (Filcnt==0) { /* bitch if we couldn't open ANY files */
- if (1) {
- Command = TRUE;
- Cmdstr = "echo \"sz: Can't open any requested files\"";
- if (getnak()) {
- Exitcode=0200; canit();
- }
- if (!Zmodem)
- canit();
- else if (zsendcmd(Cmdstr, 1+strlen(Cmdstr))) {
- Exitcode=0200; canit();
- }
- Exitcode = 1; return OK;
- }
- canit();
- fprintf(stderr,"\r\nCan't open any requested files.\r\n");
- return ERROR;
- }
- if (Zmodem)
- saybibi();
- else
- wctxpn("");
- return OK;
- }
-
- wcs(oname)
- char *oname;
- {
- register c;
- register char *p;
- struct stat f;
- char name[PATHLEN];
-
- strcpy(name, oname);
-
- if (Restricted) {
- /* restrict pathnames to current tree or uucppublic */
- if ( substr(name, "../")
- || (name[0]== '/' && strncmp(name, PUBDIR, strlen(PUBDIR))) ) {
- canit();
- fprintf(stderr,"\r\nsz:\tSecurity Violation\r\n");
- return ERROR;
- }
- }
-
- if ( !strcmp(oname, "-")) {
- if ((p = getenv("ONAME")) && *p)
- strcpy(name, p);
- else
- sprintf(name, "s%d.sz", getpid());
- in = stdin;
- }
- else if ((in=fopen(oname, "r"))==NULL) {
- ++errcnt;
- return OK; /* pass over it, there may be others */
- }
- ++Noeofseen; Lastread = 0; Lastn = -1; Dontread = FALSE;
- /* Check for directory or block special files */
- fstat(fileno(in), &f);
- c = f.st_mode & S_IFMT;
- if (c == S_IFDIR || c == S_IFBLK) {
- fclose(in);
- return OK;
- }
-
- ++Filcnt;
- switch (wctxpn(name)) {
- case ERROR:
- return ERROR;
- case ZSKIP:
- return OK;
- }
- if (!Zmodem && wctx(f.st_size)==ERROR)
- return ERROR;
- if (Unlinkafter)
- unlink(oname);
- return 0;
- }
-
- /*
- * generate and transmit pathname block consisting of
- * pathname (null terminated),
- * file length, mode time and file mode in octal
- * as provided by the Unix fstat call.
- * N.B.: modifies the passed name, may extend it!
- */
- wctxpn(name)
- char *name;
- {
- register char *p, *q;
- char name2[PATHLEN];
- struct stat f;
-
- if (Modem) {
- if ((in!=stdin) && *name && fstat(fileno(in), &f)!= -1) {
- fprintf(stderr, "Sending %s, %ld blocks: ",
- name, f.st_size>>7);
- }
- fprintf(stderr, "Give your local XMODEM receive command now.\r\n");
- return OK;
- }
- zperr("Awaiting pathname nak for %s", *name?name:"<END>");
- if ( !Zmodem)
- if (getnak())
- return ERROR;
-
- q = (char *) 0;
- if (Dottoslash) { /* change . to . */
- for (p=name; *p; ++p) {
- if (*p == '/')
- q = p;
- else if (*p == '.')
- *(q=p) = '/';
- }
- if (q && strlen(++q) > 8) { /* If name>8 chars */
- q += 8; /* make it .ext */
- strcpy(name2, q); /* save excess of name */
- *q = '.';
- strcpy(++q, name2); /* add it back */
- }
- }
-
- for (p=name, q=txbuf ; *p; )
- if ((*q++ = *p++) == '/' && !Fullname)
- q = txbuf;
- *q++ = 0;
- p=q;
- while (q < (txbuf + KSIZE))
- *q++ = 0;
- if (!Ascii && (in!=stdin) && *name && fstat(fileno(in), &f)!= -1)
- sprintf(p, "%lu %lo %o", f.st_size, f.st_mtime, f.st_mode);
- /* force 1k blocks if name won't fit in 128 byte block */
- if (txbuf[125])
- blklen=KSIZE;
- else { /* A little goodie for IMP/KMD */
- if (Zmodem)
- blklen = SECSIZ;
- txbuf[127] = (f.st_size + 127) >>7;
- txbuf[126] = (f.st_size + 127) >>15;
- }
- if (Zmodem)
- return zsendfile(txbuf, 1+strlen(p)+(p-txbuf));
- if (wcputsec(txbuf, 0, SECSIZ)==ERROR)
- return ERROR;
- return OK;
- }
-
- getnak()
- {
- register firstch;
-
- Lastrx = 0;
- for (;;) {
- switch (firstch = readock(800,1)) {
- case ZPAD:
- if (getzrxinit())
- return ERROR;
- Ascii = 0;
- return FALSE;
- case TIMEOUT:
- zperr("Timeout on pathname");
- return TRUE;
- case WANTG:
- #ifdef USG
- mode(2); /* Set cbreak, XON/XOFF, etc. */
- #endif
- Optiong = TRUE;
- blklen=KSIZE;
- case WANTCRC:
- Crcflg = TRUE;
- case NAK:
- return FALSE;
- case CAN:
- if ((firstch = readock(20,1)) == CAN && Lastrx == CAN)
- return TRUE;
- default:
- break;
- }
- Lastrx = firstch;
- }
- }
-
-
- wctx(flen)
- long flen;
- {
- register int thisblklen;
- register int sectnum, attempts, firstch;
- long charssent;
-
- charssent = 0; firstsec=TRUE; thisblklen = blklen;
- vfile("wctx:file length=%ld", flen);
-
- while ((firstch=readock(Rxtimeout, 2))!=NAK && firstch != WANTCRC
- && firstch != WANTG && firstch!=TIMEOUT && firstch!=CAN)
- ;
- if (firstch==CAN) {
- zperr("Receiver CANcelled");
- return ERROR;
- }
- if (firstch==WANTCRC)
- Crcflg=TRUE;
- if (firstch==WANTG)
- Crcflg=TRUE;
- sectnum=0;
- for (;;) {
- if (flen <= (charssent + 896L))
- thisblklen = 128;
- if ( !filbuf(txbuf, thisblklen))
- break;
- if (wcputsec(txbuf, ++sectnum, thisblklen)==ERROR)
- return ERROR;
- charssent += thisblklen;
- }
- fclose(in);
- attempts=0;
- do {
- purgeline();
- sendline(EOT);
- fflush(stdout);
- ++attempts;
- }
- while ((firstch=(readock(Rxtimeout, 1)) != ACK) && attempts < RETRYMAX);
- if (attempts == RETRYMAX) {
- zperr("No ACK on EOT");
- return ERROR;
- }
- else
- return OK;
- }
-
- wcputsec(buf, sectnum, cseclen)
- char *buf;
- int sectnum;
- int cseclen; /* data length of this sector to send */
- {
- register checksum, wcj;
- register char *cp;
- unsigned oldcrc;
- int firstch;
- int attempts;
-
- firstch=0; /* part of logic to detect CAN CAN */
-
- if (Verbose>2)
- fprintf(stderr, "Sector %3d %2dk\n", Totsecs, Totsecs/8 );
- else if (Verbose>1)
- fprintf(stderr, "\rSector %3d %2dk ", Totsecs, Totsecs/8 );
- for (attempts=0; attempts <= RETRYMAX; attempts++) {
- Lastrx= firstch;
- sendline(cseclen==KSIZE?STX:SOH);
- sendline(sectnum);
- sendline(-sectnum -1);
- oldcrc=checksum=0;
- for (wcj=cseclen,cp=buf; --wcj>=0; ) {
- sendline(*cp);
- oldcrc=updcrc((0377& *cp), oldcrc);
- checksum += *cp++;
- }
- if (Crcflg) {
- oldcrc=updcrc(0,updcrc(0,oldcrc));
- sendline((int)oldcrc>>8);
- sendline((int)oldcrc);
- }
- else
- sendline(checksum);
-
- if (Optiong) {
- firstsec = FALSE; return OK;
- }
- firstch = readock(Rxtimeout, (Noeofseen&§num) ? 2:1);
- gotnak:
- switch (firstch) {
- case CAN:
- if(Lastrx == CAN) {
- cancan:
- zperr("Cancelled"); return ERROR;
- }
- break;
- case TIMEOUT:
- zperr("Timeout on sector ACK"); continue;
- case WANTCRC:
- if (firstsec)
- Crcflg = TRUE;
- case NAK:
- zperr("NAK on sector"); continue;
- case ACK:
- firstsec=FALSE;
- Totsecs += (cseclen>>7);
- return OK;
- case ERROR:
- zperr("Got burst for sector ACK"); break;
- default:
- zperr("Got %02x for sector ACK", firstch); break;
- }
- for (;;) {
- Lastrx = firstch;
- if ((firstch = readock(Rxtimeout, 2)) == TIMEOUT)
- break;
- if (firstch == NAK || firstch == WANTCRC)
- goto gotnak;
- if (firstch == CAN && Lastrx == CAN)
- goto cancan;
- }
- }
- zperr("Retry Count Exceeded");
- return ERROR;
- }
-
- /* fill buf with count chars padding with ^Z for CPM */
- filbuf(buf, count)
- register char *buf;
- {
- register c, m;
-
- if ( !Ascii) {
- m = read(fileno(in), buf, count);
- if (m <= 0)
- return 0;
- while (m < count)
- buf[m++] = 032;
- return count;
- }
- m=count;
- if (Lfseen) {
- *buf++ = 012; --m; Lfseen = 0;
- }
- while ((c=getc(in))!=EOF) {
- if (c == 012) {
- *buf++ = 015;
- if (--m == 0) {
- Lfseen = TRUE; break;
- }
- }
- *buf++ =c;
- if (--m == 0)
- break;
- }
- if (m==count)
- return 0;
- else
- while (--m>=0)
- *buf++ = CPMEOF;
- return count;
- }
- /* fill buf with count chars */
- zfilbuf(buf, count)
- register char *buf;
- {
- register c, m;
-
- m=count;
- while ((c=getc(in))!=EOF) {
- *buf++ =c;
- if (--m == 0)
- break;
- }
- return (count - m);
- }
-
- /* VARARGS1 */
- vfile(f, a, b, c)
- register char *f;
- {
- if (Verbose > 2) {
- fprintf(stderr, f, a, b, c);
- fprintf(stderr, "\n");
- }
- }
-
-
- alrm()
- {
- longjmp(tohere, -1);
- }
-
-
- /*
- * readock(timeout, count) reads character(s) from file descriptor 0
- * (1 <= count <= 3)
- * it attempts to read count characters. If it gets more than one,
- * it is an error unless all are CAN
- * (otherwise, only normal response is ACK, CAN, or C)
- * Only looks for one if Optiong, which signifies cbreak, not raw input
- *
- * timeout is in tenths of seconds
- */
- readock(timeout, count)
- {
- register int c;
- static char byt[5];
-
- if (Optiong)
- count = 1; /* Special hack for cbreak */
-
- fflush(stdout);
- if (setjmp(tohere)) {
- zperr("TIMEOUT");
- return TIMEOUT;
- }
- c = timeout/10;
- if (c<2)
- c=2;
- if (Verbose>5) {
- fprintf(stderr, "Timeout=%d Calling alarm(%d) ", timeout, c);
- byt[1] = 0;
- }
- signal(SIGALRM, alrm); alarm(c);
- #ifdef ONEREAD
- c=read(iofd, byt, 1); /* regulus raw read is unique */
- #else
- c=read(iofd, byt, count);
- #endif
- alarm(0);
- if (Verbose>5)
- fprintf(stderr, "ret cnt=%d %x %x\n", c, byt[0], byt[1]);
- if (c<1)
- return TIMEOUT;
- if (c==1)
- return (byt[0]&0377);
- else
- while (c)
- if (byt[--c] != CAN)
- return ERROR;
- return CAN;
- }
- readline(n)
- {
- return (readock(n, 1));
- }
-
-
- purgeline()
- {
- #ifdef USG
- ioctl(iofd, TCFLSH, 0);
- #else
- lseek(iofd, 0L, 2);
- #endif
- }
-
-
- /* 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);
- fflush(stdout);
- }
-
- /*
- * Log an error
- */
- /*VARARGS1*/
- zperr(s,p,u)
- char *s, *p, *u;
- {
- if (Verbose <= 0)
- return;
- fprintf(stderr, "Error %d: ", errors);
- fprintf(stderr, s, p, u);
- fprintf(stderr, "\n");
- }
-
- /*
- * return 1 iff stdout and stderr are different devices
- * indicating this program operating with a modem on a
- * different line
- */
- from_cu()
- {
- struct stat a, b;
- fstat(1, &a); fstat(2, &b);
- return (a.st_rdev != b.st_rdev);
- }
-
- /*
- * 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;
- }
-
- char *babble[] = {
- "Send file(s) with ZMODEM/YMODEM/XMODEM Protocol",
- " (Y) = Option applies to YMODEM only",
- " (Z) = Option applies to ZMODEM only",
- "Usage: sz [-12+abdefkLlNnquvwYy] [-] file ...",
- " sz [-12Ceqv] -c COMMAND",
- " sb [-12adfkquv] [-] file ...",
- " sx [-12akquv] [-] file",
- " 1 Use stdout for modem input",
- #ifdef CSTOPB
- " 2 Use 2 stop bits",
- #endif
- " + Append to existing destination file (Z)",
- " a (ASCII) change NL to CR/LF",
- " b Binary file transfer override",
- " c send COMMAND (Z)",
- " d Change '.' to '/' in pathnames (Y/Z)",
- " e Escape all control characters (Z)",
- " f send Full pathname (Y/Z)",
- " i send COMMAND, ack Immediately (Z)",
- " k Send 1024 byte packets (Y)",
- " L N Limit subpacket length to N bytes (Z)",
- " l N Limit frame length to N bytes (l>=L) (Z)",
- " n send file if source newer (Z)",
- " N send file if source newer or longer (Z)",
- " o Use 16 bit CRC instead of 32 bit CRC (Z)",
- " p Protect existing destination file (Z)",
- " r Resume/Recover interrupted file transfer (Z)",
- " q Quiet (no progress reports)",
- " u Unlink file after transmission",
- " v Verbose - provide debugging information",
- " w N Window is N bytes (Z)",
- " Y Yes, overwrite existing file, skip if not present at rx (Z)",
- " y Yes, overwrite existing file (Z)",
- "- as pathname sends standard input as sPID.sz or environment ONAME",
- ""
- };
-
- usage()
- {
- char **pp;
-
- for (pp=babble; **pp; ++pp)
- fprintf(stderr, "%s\n", *pp);
- fprintf(stderr, "%s for %s by Chuck Forsberg ", VERSION, OS);
- exit(1);
- }
-
- /*
- * Get the receiver's init parameters
- */
- getzrxinit()
- {
- register n;
- struct stat f;
-
- for (n=10; --n>=0; ) {
-
- switch (zgethdr(Rxhdr, 1)) {
- case ZCHALLENGE: /* Echo receiver's challenge numbr */
- stohdr(Rxpos);
- zshhdr(ZACK, Txhdr);
- continue;
- case ZCOMMAND: /* They didn't see out ZRQINIT */
- stohdr(0L);
- zshhdr(ZRQINIT, Txhdr);
- continue;
- case ZRINIT:
- Rxflags = 0377 & Rxhdr[ZF0];
- Txfcs32 = (Wantfcs32 && (Rxflags & CANFC32));
- Zctlesc |= Rxflags & TESCCTL;
- Rxbuflen = (0377 & Rxhdr[ZP0])+((0377 & Rxhdr[ZP1])<<8);
- vfile("Rxbuflen=%d Tframlen=%d", Rxbuflen, Tframlen);
- if ( !Fromcu)
- signal(SIGINT, SIG_IGN);
- #ifdef USG
- mode(2); /* Set cbreak, XON/XOFF, etc. */
- #endif
- #ifndef READCHECK
- #ifndef USG
- /* Use 1024 byte frames if no sample/interrupt */
- if (Rxbuflen < 32 || Rxbuflen > 1024) {
- Rxbuflen = 1024;
- vfile("Rxbuflen=%d", Rxbuflen);
- }
- #endif
- #endif
- /* Override to force shorter frame length */
- if (Rxbuflen && (Rxbuflen>Tframlen) && (Tframlen>=32))
- Rxbuflen = Tframlen;
- if ( !Rxbuflen && (Tframlen>=32) && (Tframlen<=1024))
- Rxbuflen = Tframlen;
- vfile("Rxbuflen=%d", Rxbuflen);
-
- /* If using a pipe for testing set lower buf len */
- fstat(iofd, &f);
- if ((f.st_mode & S_IFMT) != S_IFCHR
- && (Rxbuflen == 0 || Rxbuflen > 4096))
- Rxbuflen = 4096;
- /*
- * If input is not a regular file, force ACK's each 1024
- * (A smarter strategey could be used here ...)
- */
- fstat(fileno(in), &f);
- if (((f.st_mode & S_IFMT) != S_IFREG)
- && (Rxbuflen == 0 || Rxbuflen > 1024))
- Rxbuflen = 1024;
- vfile("Rxbuflen=%d", Rxbuflen);
-
- return (sendzsinit());
- case ZCAN:
- case TIMEOUT:
- return ERROR;
- case ZRQINIT:
- if (Rxhdr[ZF0] == ZCOMMAND)
- continue;
- default:
- zshhdr(ZNAK, Txhdr);
- continue;
- }
- }
- return ERROR;
- }
-
- /* Send send-init information */
- sendzsinit()
- {
- register c;
-
- if (Myattn[0] == '\0' && (!Zctlesc || (Rxflags & TESCCTL)))
- return OK;
- errors = 0;
- for (;;) {
- stohdr(0L);
- if (Zctlesc) {
- Txhdr[ZF0] |= TESCCTL; zshhdr(ZSINIT, Txhdr);
- }
- else
- zsbhdr(ZSINIT, Txhdr);
- zsdata(Myattn, 1+strlen(Myattn), ZCRCW);
- c = zgethdr(Rxhdr, 1);
- switch (c) {
- case ZCAN:
- return ERROR;
- case ZACK:
- return OK;
- default:
- if (++errors > 19)
- return ERROR;
- continue;
- }
- }
- }
-
- /* Send file name and related info */
- zsendfile(buf, blen)
- char *buf;
- {
- register c;
-
- for (;;) {
- Txhdr[ZF0] = Lzconv; /* file conversion request */
- Txhdr[ZF1] = Lzmanag; /* file management request */
- if (Lskipnocor)
- Txhdr[ZF1] |= ZMSKNOLOC;
- Txhdr[ZF2] = Lztrans; /* file transport request */
- Txhdr[ZF3] = 0;
- zsbhdr(ZFILE, Txhdr);
- zsdata(buf, blen, ZCRCW);
- again:
- c = zgethdr(Rxhdr, 1);
- switch (c) {
- case ZRINIT:
- while ((c = readline(50)) > 0)
- if (c == ZPAD) {
- goto again;
- }
- /* **** FALL THRU TO **** */
- default:
- continue;
- case ZCAN:
- case TIMEOUT:
- case ZABORT:
- case ZFIN:
- return ERROR;
- case ZSKIP:
- fclose(in); return c;
- case ZRPOS:
- /*
- * Suppress zcrcw request otherwise triggered by
- * lastyunc==bytcnt
- */
- Lastsync = (bytcnt = Txpos = Rxpos) -1;
- fseek(in, Rxpos, 0);
- Dontread = FALSE;
- return zsendfdata();
- }
- }
- }
-
- /* Send the data in the file */
- zsendfdata()
- {
- register c, e, n;
- register newcnt;
- register long tcount = 0;
- int junkcount; /* Counts garbage chars received by TX */
- static int tleft = 6; /* Counter for test mode */
-
- if (Baudrate > 300)
- blklen = 256;
- if (Baudrate > 1200)
- blklen = 512;
- if (Baudrate > 2400)
- blklen = KSIZE;
- if (Rxbuflen && blklen>Rxbuflen)
- blklen = Rxbuflen;
- if (blkopt && blklen > blkopt)
- blklen = blkopt;
- vfile("Rxbuflen=%d blklen=%d", Rxbuflen, blklen);
- vfile("Txwindow = %u Txwspac = %d", Txwindow, Txwspac);
- Lrxpos = 0;
- junkcount = 0;
- Beenhereb4 = FALSE;
- somemore:
- if (setjmp(intrjmp)) {
- waitack:
- junkcount = 0;
- c = getinsync(0);
- gotack:
- switch (c) {
- default:
- case ZCAN:
- fclose(in);
- return ERROR;
- case ZSKIP:
- fclose(in);
- return c;
- case ZACK:
- case ZRPOS:
- break;
- case ZRINIT:
- return OK;
- }
- #ifdef READCHECK
- /*
- * If the reverse channel can be tested for data,
- * this logic may be used to detect error packets
- * sent by the receiver, in place of setjmp/longjmp
- * rdchk(fdes) returns non 0 if a character is available
- */
- while (rdchk(iofd)) {
- #ifdef SVR2
- switch (checked)
- #else
- switch (readline(1))
- #endif
- {
- case CAN:
- case ZPAD:
- c = getinsync(1);
- goto gotack;
- case XOFF: /* Wait a while for an XON */
- case XOFF|0200:
- readline(100);
- }
- }
- #endif
- }
-
- if ( !Fromcu)
- signal(SIGINT, onintr);
- newcnt = Rxbuflen;
- Txwcnt = 0;
- stohdr(Txpos);
- zsbhdr(ZDATA, Txhdr);
-
- /*
- * Special testing mode. This should force receiver to Attn,ZRPOS
- * many times. Each time the signal should be caught, causing the
- * file to be started over from the beginning.
- */
- if (Testattn) {
- if ( --tleft)
- while (tcount < 20000) {
- printf(qbf); fflush(stdout);
- tcount += strlen(qbf);
- #ifdef READCHECK
- while (rdchk(iofd)) {
- #ifdef SVR2
- switch (checked)
- #else
- switch (readline(1))
- #endif
- {
- case CAN:
- case ZPAD:
- #ifdef TCFLSH
- ioctl(iofd, TCFLSH, 1);
- #endif
- goto waitack;
- case XOFF: /* Wait for XON */
- case XOFF|0200:
- readline(100);
- }
- }
- #endif
- }
- signal(SIGINT, SIG_IGN); canit();
- sleep(3); purgeline(); mode(0);
- printf("\nsz: Tcount = %ld\n", tcount);
- if (tleft) {
- printf("ERROR: Interrupts Not Caught\n");
- exit(1);
- }
- exit(0);
- }
-
- do {
- if (Dontread) {
- n = Lastn;
- } else {
- n = zfilbuf(txbuf, blklen);
- Lastread = Txpos; Lastn = n;
- }
- Dontread = FALSE;
- if (n < blklen)
- e = ZCRCE;
- else if (junkcount > 3)
- e = ZCRCW;
- else if (bytcnt == Lastsync)
- e = ZCRCW;
- else if (Rxbuflen && (newcnt -= n) <= 0)
- e = ZCRCW;
- else if (Txwindow && (Txwcnt += n) >= Txwspac) {
- Txwcnt = 0; e = ZCRCQ;
- }
- else
- e = ZCRCG;
- if (Verbose>1)
- fprintf(stderr, "\r%7ld ZMODEM%s ",
- Txpos, Crc32t?" CRC-32":"");
- zsdata(txbuf, n, e);
- bytcnt = Txpos += n;
- if (e == ZCRCW)
- goto waitack;
- #ifdef READCHECK
- /*
- * If the reverse channel can be tested for data,
- * this logic may be used to detect error packets
- * sent by the receiver, in place of setjmp/longjmp
- * rdchk(fdes) returns non 0 if a character is available
- */
- fflush(stdout);
- while (rdchk(iofd)) {
- #ifdef SVR2
- switch (checked)
- #else
- switch (readline(1))
- #endif
- {
- case CAN:
- case ZPAD:
- c = getinsync(1);
- if (c == ZACK)
- break;
- #ifdef TCFLSH
- ioctl(iofd, TCFLSH, 1);
- #endif
- /* zcrce - dinna wanna starta ping-pong game */
- zsdata(txbuf, 0, ZCRCE);
- goto gotack;
- case XOFF: /* Wait a while for an XON */
- case XOFF|0200:
- readline(100);
- default:
- ++junkcount;
- }
- }
- #endif /* READCHECK */
- if (Txwindow) {
- while ((tcount = Txpos - Lrxpos) >= Txwindow) {
- vfile("%ld window >= %u", tcount, Txwindow);
- if (e != ZCRCQ)
- zsdata(txbuf, 0, e = ZCRCQ);
- c = getinsync(1);
- if (c != ZACK) {
- #ifdef TCFLSH
- ioctl(iofd, TCFLSH, 1);
- #endif
- zsdata(txbuf, 0, ZCRCE);
- goto gotack;
- }
- }
- vfile("window = %ld", tcount);
- }
- } while (n == blklen);
- if ( !Fromcu)
- signal(SIGINT, SIG_IGN);
-
- for (;;) {
- stohdr(Txpos);
- zsbhdr(ZEOF, Txhdr);
- switch (getinsync(0)) {
- case ZACK:
- continue;
- case ZRPOS:
- goto somemore;
- case ZRINIT:
- return OK;
- case ZSKIP:
- fclose(in);
- return c;
- default:
- fclose(in);
- return ERROR;
- }
- }
- }
-
- /*
- * Respond to receiver's complaint, get back in sync with receiver
- */
- getinsync(flag)
- {
- register c;
-
- for (;;) {
- if (Testattn) {
- printf("\r\n\n\n***** Signal Caught *****\r\n");
- Rxpos = 0; c = ZRPOS;
- } else
- c = zgethdr(Rxhdr, 0);
- switch (c) {
- case ZCAN:
- case ZABORT:
- case ZFIN:
- case TIMEOUT:
- return ERROR;
- case ZRPOS:
- if (Lastn >= 0 && Lastread == Rxpos) {
- Dontread = TRUE;
- } else {
- clearerr(in); /* In case file EOF seen */
- fseek(in, Rxpos, 0);
- }
- bytcnt = Lrxpos = Txpos = Rxpos;
- if (Lastsync == Rxpos) {
- if (++Beenhereb4 > 4)
- if (blklen > 256)
- blklen /= 2;
- }
- Lastsync = Rxpos;
- return c;
- case ZACK:
- Lrxpos = Rxpos;
- if (flag || Txpos == Rxpos)
- return ZACK;
- continue;
- case ZRINIT:
- case ZSKIP:
- fclose(in);
- return c;
- case ERROR:
- default:
- zsbhdr(ZNAK, Txhdr);
- continue;
- }
- }
- }
-
-
- /* Say "bibi" to the receiver, try to do it cleanly */
- saybibi()
- {
- for (;;) {
- stohdr(0L);
- zsbhdr(ZFIN, Txhdr);
- switch (zgethdr(Rxhdr, 0)) {
- case ZFIN:
- sendline('O'); sendline('O'); flushmo();
- case ZCAN:
- case TIMEOUT:
- return;
- }
- }
- }
-
- /* Local screen character display function */
- bttyout(c)
- {
- if (Verbose)
- putc(c, stderr);
- }
-
- /* Send command and related info */
- zsendcmd(buf, blen)
- char *buf;
- {
- register c;
- long cmdnum;
-
- cmdnum = getpid();
- errors = 0;
- for (;;) {
- stohdr(cmdnum);
- Txhdr[ZF0] = Cmdack1;
- zsbhdr(ZCOMMAND, Txhdr);
- zsdata(buf, blen, ZCRCW);
- listen:
- Rxtimeout = 100; /* Ten second wait for resp. */
- c = zgethdr(Rxhdr, 1);
-
- switch (c) {
- case ZRINIT:
- goto listen; /* CAF 8-21-87 */
- case ERROR:
- case TIMEOUT:
- if (++errors > Cmdtries)
- return ERROR;
- continue;
- case ZCAN:
- case ZABORT:
- case ZFIN:
- case ZSKIP:
- case ZRPOS:
- return ERROR;
- default:
- if (++errors > 20)
- return ERROR;
- continue;
- case ZCOMPL:
- Exitcode = Rxpos;
- saybibi();
- return OK;
- case ZRQINIT:
- vfile("******** RZ *******");
- system("rz");
- vfile("******** SZ *******");
- goto listen;
- }
- }
- }
-
- /*
- * If called as sb 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]=='s' && s[1]=='b') {
- Nozmodem = TRUE; blklen=KSIZE;
- }
- if (s[0]=='s' && s[1]=='x') {
- Modem = TRUE;
- }
- }
- /* End of sz.c */
-