home *** CD-ROM | disk | FTP | other *** search
- char * Version = "minirb 3.00 05-02-93";
-
- #include <stdio.h>
- #include <signal.h>
- #include <setjmp.h>
-
- #define OK 0
- #define FALSE 0
- #define TRUE 1
- #define ERROR (-1)
- #define CAN ('X'&037)
- #define SOH 1
- #define STX 2
- #define EOT 4
- #define ACK 6
- #define NAK 025
- #define TIMEOUT (-2)
- #define RETRYMAX 15
- #define WCEOT (-10)
-
- FILE *fout;
- long Bytesleft;
- int Blklen;
- char secbuf[1024];
- char linbuf[1024];
- int Lleft=0;
- jmp_buf tohere;
-
- void mode(n) {
- if (n) system("stty raw -echo");
- else system("stty echo -raw");
- }
-
- void alrm(c) { longjmp(tohere, -1); }
-
- void bibi(n) {
- mode(0); fprintf(stderr, "minirb: caught signal %d; exiting", n); exit(128+n);
- }
-
- main() {
- mode(1);
- if (signal(SIGINT, bibi) == SIG_IGN) {
- signal(SIGINT, SIG_IGN); signal(SIGKILL, SIG_IGN);
- } else {
- signal(SIGINT, bibi); signal(SIGKILL, bibi);
- }
- printf("minirb: Now send file(s) with \042sb file ...\042 command\r\n");
- wcreceive(); mode(0); exit(0);
- }
-
- wcreceive() {
- for (;;) {
- if (wcrxpn(secbuf) == ERROR) break;
- if (secbuf[0]==0) return;
- if (procheader(secbuf)==ERROR || wcrx()==ERROR) break;
- }
- }
-
- wcrxpn(rpn) char *rpn; {
- register c;
-
- et_tu:
- sendline(NAK); Lleft=0;
- while ((c = wcgetsec(rpn)) != 0) {
- if (c == WCEOT) { sendline(ACK); Lleft=0; rdln(2); goto et_tu; }
- return ERROR;
- }
- sendline(ACK); return OK;
- }
-
- wcrx() {
- register int sectnum, sectcurr, sendchar, cblklen;
-
- sectnum=0; sendchar=NAK;
- for (;;) {
- sendline(sendchar); Lleft=0;
- sectcurr=wcgetsec(secbuf);
- if (sectcurr==(sectnum+1 & 0377)) {
- sectnum++; cblklen = Bytesleft>Blklen ? Blklen:Bytesleft;
- putsec(secbuf, cblklen);
- if ((Bytesleft-=cblklen) < 0) Bytesleft = 0;
- sendchar=ACK;
- }
- else if (sectcurr==(sectnum&0377)) sendchar=ACK;
- else if (sectcurr==WCEOT) {
- if (fclose(fout)==ERROR) return ERROR;
- sendline(ACK); Lleft=0; return OK;
- }
- else if (sectcurr==ERROR) return ERROR;
- else return ERROR;
- }
- }
-
- wcgetsec(rxbuf) char *rxbuf; {
- register checksum, wcj, firstch; register char *p; int sectcurr, errors;
- for (errors=0; errors<RETRYMAX; errors++) {
- if ((firstch=rdln(5))==STX) { Blklen=1024; goto get2; }
- if (firstch==SOH) {
- Blklen=128;
- get2:
- sectcurr=rdln(2); checksum=0;
- if ((sectcurr+(rdln(2)))==0377) {
- for (p=rxbuf,wcj=Blklen; --wcj>=0; ) {
- if ((firstch=rdln(2)) < 0) goto bilge;
- checksum += (*p++ = firstch);
- }
- if ((firstch=rdln(2)) < 0) goto bilge;
- if (((checksum-firstch)&0377)==0) return sectcurr;
- }
- }
- else if (firstch==EOT) return WCEOT;
- else if (firstch==CAN) return ERROR;
- bilge:
- while(rdln(2)!=TIMEOUT)
- ;
- sendline(NAK); Lleft=0;
- }
- return ERROR;
- }
-
- rdln(timeout) int timeout; {
- static char *cdq;
-
- if (--Lleft >= 0) return (*cdq++ & 0377);
- if (setjmp(tohere)) { Lleft = 0; return TIMEOUT; }
- signal(SIGALRM, alrm); alarm(timeout);
- Lleft=read(0, cdq=linbuf, 1024); alarm(0);
- if (Lleft < 1) return TIMEOUT;
- --Lleft; return (*cdq++ & 0377);
- }
-
- procheader(name) char *name; {
- register char *p;
-
- Bytesleft = 2000000000L; p = name + 1 + strlen(name);
- if (*p) sscanf(p, "%ld", &Bytesleft);
- if ((fout=fopen(name, "w")) == NULL) return ERROR;
- return OK;
- }
-
- putsec(p, n) char *p; int n;
- { for (; --n>=0; ++p) putc(*p, fout); }
-
- sendline(c) { char d; d = c; write(1, &d, 1); }
-
- /* End of minirb.c */
-