ckuus3.c

C语言核心协议的C语言源代码,用于早期网络通信

        printf("\n?Sorry, 94 is the maximum\n");
        return(-2);
    }
    if ((y = cmcfm()) < 0) return(y);
    *prm = x;
    return(0);
}

/*  S E T C C  --  Set parameter to an ASCII control character value.  */

setcc(prm,x,y) int x, y, *prm; {
    if (y < 0) return(y);
    if ((x > 037) && (x != 0177)) {
        printf2("\n?Not in ASCII control range - %d\n",x);
        return(-2);
    }
    if ((y = cmcfm()) < 0) return(y);
    *prm = x;
    return(0);
}










/*  D O R M T  --  Do a remote command  */

dormt(xx) int xx; {
    int x;
    char *s, sbuf[50], *s2;

    if (xx < 0) return(xx);
    switch (xx) {

case XZCWD:                             /* CWD */
    if ((x = cmtxt("Remote directory name","",&s)) < 0) return(x);
    debug(F111,"XZCWD: ",s,x);
    *sbuf = NUL;
    s2 = sbuf;
    if (*s != NUL) {                    /* If directory name given, */
                                        /* get password on separate line. */
        if (tlevel > -1) {              /* From take file... */

            *line = NUL;
            if (fgets(sbuf,50,tfile[tlevel]) == NULL)
                ermsg("take file ends prematurely in 'remote cwd'");
            debug(F110," pswd from take file",s2,0);

        } else {                        /* From terminal... */

            printf(" Password: ");              /* get a password */
            while (((x = getchar()) != NL) && (x != CR)) { /* with no echo */
                if ((x &= 0177) == '?') {
                    printf("? Password of remote directory\n Password: ");
                    s2 = sbuf;
                    *sbuf = NUL;
                }
                else if (x == ESC)      /* Mini command line editor... */
                    putchar(BEL);
                else if (x == BS || x == 0177)
                    s2--;
                else if (x == 025) {
                    s2 = sbuf;
                    *sbuf = NUL;
                }
                else
                    *s2++ = x;
            }
            *s2 = NUL;
            putchar('\n');
        }
        s2 = sbuf;
    } else s2 = "";
    debug(F110," password",s2,0);
    sstate = setgen('C',s,s2,"");
    return(0);










case XZDEL:                             /* Delete */
    if ((x = cmtxt("Name of remote file(s) to delete","",&s)) < 0) return(x);
    return(sstate = rfilop(s,'E'));

case XZDIR:                             /* Directory */
    if ((x = cmtxt("Remote directory or file specification","",&s)) < 0)
        return(x);
    return(sstate = setgen('D',s,"",""));

case XZHLP:                             /* Help */
    if (x = (cmcfm()) < 0) return(x);
    sstate = setgen('H',"","","");
    return(0);

case XZHOS:                             /* Host */
    if ((x = cmtxt("Command for remote system","",&cmarg)) < 0) return(x);
    return(sstate = 'c');

case XZPRI:                             /* Print */
    if ((x = cmtxt("Remote file(s) to print on remote printer","",&s)) < 0)
        return(x);
    return(sstate = rfilop(s,'S'));

case XZSPA:                             /* Space */
    if ((x = cmtxt("Confirm, or remote directory name","",&s)) < 0) return(x);
    return(sstate = setgen('U',s,"",""));

case XZTYP:                             /* Type */
    if ((x = cmtxt("Remote file specification","",&s)) < 0) return(x);
    return(sstate = rfilop(s,'T'));

case XZWHO:
    if ((x = cmtxt("Remote user name, or carriage return","",&s)) < 0)
        return(x);
    return(sstate = setgen('W',s,"",""));

default:
    if (x = (cmcfm()) < 0) return(x);
    printf2("not working yet - %s\n",cmdbuf);
    return(-2);
    }
}



/*  R F I L O P  --  Remote File Operation  */

rfilop(s,t) char *s, t; {
    if (*s == NUL) {
        printf("?File specification required\n");
        return(-2);
    }
    debug(F111,"rfilop",s,t);
    return(setgen(t,s,"",""));
}










/*  S C R E E N  --  Screen display function  */

/*  screen(f,c,n,s)
      f - argument descriptor
      c - a character or small integer
      n - a long integer
      s - a string.
 Fill in this routine with the appropriate display update for the system.
 This version is for a dumb tty.
*/
screen(f,c,n,s) int f; long n; char c; char *s; {
    static int p = 0;                   /* Screen position */
    int len;                            /* Length of string */
    char buf[80];                       /* Output buffer */
    len = strlen(s);                    /* Length of string */
    if (!displa || quiet) return;       /* No update if display flag off */

    switch (f) {

case SCR_FN:                            /* filename */
    conoll(""); conol(s); conoc(SP); p = len + 1; return;

case SCR_AN:                            /* as-name */
    if (p + len > 75) { conoll(""); p = 0; }
    conol("=> "); conol(s); if ((p += (len + 3)) > 78) { conoll(""); p = 0; }
    return;

case SCR_FS:                            /* file-size */
    sprintf(buf,", Size: %ld",n);  conoll(buf);  p = 0; return;

case SCR_XD:                            /* x-packet data */
    conoll(""); conoll(s); p = 0; return;

case SCR_ST:                            /* File status */
    switch (c) {
        case ST_OK:                     /*  Transferred OK */
            if ((p += 5) > 78) { conoll(""); p = 0; }
            conoll(" [OK]"); p += 5; return;

        case ST_DISC:                   /*  Discarded */
            if ((p += 12) > 78) { conoll(""); p = 0; }
            conoll(" [discarded]"); p += 12; return;

        case ST_INT:                    /*  Interrupted */
            if ((p += 14) > 78) { conoll(""); p = 0; }
            conoll(" [interrupted]"); p += 14; return;

        case ST_SKIP:                   /*  Skipped */
            conoll("");
            conol("Skipping "); conoll(s); p = 0;
            return;

        default:
            conoll("*** screen() called with bad status ***"); p = 0; return;
    }










case SCR_PN:                            /* Packet number */
    sprintf(buf,"%s: %ld",s,n); conol(buf); p += strlen(buf); return;

case SCR_PT:                            /* Packet type or pseudotype */
    if (c == 'Y') return;               /* Don't bother with ACKs */
    if (c == 'D') {                     /* Only show every 4th data packet */
        if (n % 4) return;
        c = '.';
    }
#ifndef AMIGA
    if (p++ > 78) {                     /* If near right margin, */
        conoll("");                     /* Start new line */
        p = 0;                          /* and reset counter. */
    }
#endif
    conoc(c);                           /* Display the character. */
#ifdef AMIGA
    if (c == 'G') conoll("");           /* new line after G packets */
#endif
    return;

case SCR_TC:                            /* transaction complete */
    conoc(BEL); return;

case SCR_EM:                            /* Error message */
    conoll(""); conoc('?'); conoll(s); p = 0; return;           /* +1   */

case SCR_WM:                            /* Warning message */
    conoll(""); conoll(s); p = 0; return;

case SCR_TU:                            /* Undelimited text */
    if ((p += len) > 78) { conoll(""); p = len; }
    conol(s); return;

case SCR_TN:                            /* Text delimited at beginning */
    conoll(""); conol(s); p = len; return;

case SCR_TZ:                            /* Text delimited at end */
    if ((p += len) > 78) { conoll(""); p = len; }
    conoll(s); return;

case SCR_QE:                            /* Quantity equals */
    sprintf(buf,"%s: %ld",s,n);
    conoll(buf); p = 0; return;

default:
    conoll("*** screen() called with bad object ***"); p = 0; return;
    }
}










/*  I N T M S G  --  Issue message about terminal interrupts  */

intmsg(n) long n; {
    extern char *chstr();
    char buf[80];

    if ((!displa) || (quiet)) return;
#ifdef UXIII
    (void) conchk();    /* clear out pending escape-signals in ckxbsd.c */
#endif
    if (n == 1) {
#ifdef UXIII
                                /* we need to signal before kb input */
        sprintf(buf,"Type escape (%s) followed by:",chstr(escape));
        screen(SCR_TN,0,0l,buf);
#endif
 screen(SCR_TN,0,0l,"CTRL-F to cancel file,  CTRL-R to resend current packet");
 screen(SCR_TN,0,0l,"CTRL-B to cancel batch, CTRL-A for status report: ");
    }
    else screen(SCR_TU,0,0l," ");
}










/*  C H K I N T  --  Check for console interrupts  */

/*** should rework not to destroy typeahead ***/

chkint() {
    int ch, cn;

    if ((!local) || (quiet)) return(0); /* Only do this if local & not quiet */
    cn = conchk();                      /* Any input waiting? */
    debug(F101,"conchk","",cn);

    while (cn > 0) {                    /* Yes, read it. */
        cn--;
                        /* give read 5 seconds for interrupt character */
        if ((ch = coninc(5)) < 0) return(0);
        switch (ch & 0177) {
            case 0001:                  /* CTRL-A */
                screen(SCR_TN,0,0l,"^A  Status report:");
                screen(SCR_TN,0,0l," file type: ");
                if (binary) screen(SCR_TZ,0,0l,"binary");
                    else    screen(SCR_TZ,0,0l,"text");
                screen(SCR_QE,0,(long)filcnt," file number");
                screen(SCR_QE,0,(long)ffc,   " characters ");
                screen(SCR_QE,0,(long)bctu,  " block check");
                screen(SCR_QE,0,(long)rptflg," compression");
                screen(SCR_QE,0,(long)ebqflg," 8th-bit prefixing");
                continue;
            case 0002:                  /* CTRL-B */
                screen(SCR_TN,0,0l,"^B - Cancelling Batch ");
                czseen = 1;
                continue;
            case 0006:                  /* CTRL-F */
                screen(SCR_TN,0,0l,"^F - Cancelling File ");
                cxseen = 1;
                continue;
            case 0022:                  /* CTRL-R */
                screen(SCR_TN,0,0l,"^R - Resending ");
                resend();
                return(1);
            default:                    /* Anything else, just ignore */
                screen(SCR_TU,0,0l," [Ignored] ");
                continue;
        }
    }
    return(0);
}










/*  D E B U G  --  Enter a record in the debugging log  */

/*
 Call with a format, two strings, and a number:
   f  - Format, a bit string in range 0-7.
        If bit x is on, then argument number x is printed.
   s1 - String, argument number 1.  If selected, printed as is.
   s2 - String, argument number 2.  If selected, printed in brackets.
   n  - Int, argument 3.  If selected, printed preceded by equals sign.

   f=0 is special: print s1,s2, and interpret n as a char.
*/
#ifdef DEBUG
debug(f,s1,s2,n) int f, n; char *s1, *s2; {
    static char s[200];
    char *sp = s;

    if (!deblog) return;                /* If no debug log, don't */
    switch (f) {
        case F000:                      /* 0, print both strings, */
            sprintf(sp,"%s%s%c\n",s1,s2,n); /*  and interpret n as a char */
            zsout(ZDFILE,s);
            break;
        case F001:                      /* 1, "=n" */
            sprintf(sp,"=%d\n",n);
            zsout(ZDFILE,s);
            break;
        case F010:                      /* 2, "[s2]" */
            sprintf(sp,"[%s]\n",s2);
            zsout(ZDFILE,"");
            break;
        case F011:                      /* 3, "[s2]=n" */
            sprintf(sp,"[%s]=%d\n",s2,n);
            zsout(ZDFILE,s);
            break;
        case F100:                      /* 4, "s1" */
            zsoutl(ZDFILE,s1);
            break;
        case F101:                      /* 5, "s1=n" */
            sprintf(sp,"%s=%d\n",s1,n);
            zsout(ZDFILE,s);
            break;
        case F110:                      /* 6, "s1[s2]" */
            sprintf(sp,"%s[%s]\n",s1,s2);
            zsout(ZDFILE,s);
            break;
        case F111:                      /* 7, "s1[s2]=n" */
            sprintf(sp,"%s[%s]=%d\n",s1,s2,n);
            zsout(ZDFILE,s);
            break;
        default:
            sprintf(sp,"\n?Invalid format for debug() - %d\n",n);
            zsout(ZDFILE,s);
    }
}
#endif










#ifdef TLOG
/*  T L O G  --  Log a record in the transaction file  */
/*
 Call with a format and 3 arguments: two strings and a number:
   f  - Format, a bit string in range 0-7, bit x is on, arg #x is printed.
   s1,s2 - String arguments 1 and 2.
   n  - Int, argument 3.
*/
tlog(f,s1,s2,n) int f; long n; char *s1, *s2; {
    static char s[200];
    char *sp = s; int x;

    if (!tralog) return;                /* If no transaction log, don't */
    switch (f) {
        case F000:                      /* 0 (special) "s1 n s2"  */
            sprintf(sp,"%s %ld %s\n",s1,n,s2);
            zsout(ZTFILE,s);
            break;
        case F001:                      /* 1, " n" */
            sprintf(sp," %ld\n",n);
            zsout(ZTFILE,s);
            break;
        case F010:                      /* 2, "[s2]" */
            x = strlen(s2);
            if (s2[x] == '\n') s2[x] = '\0';
            sprintf(sp,"[%s]\n",s2);
            zsout(ZTFILE,"");
            break;
        case F011:                      /* 3, "[s2] n" */
            x = strlen(s2);
            if (s2[x] == '\n') s2[x] = '\0';
            sprintf(sp,"[%s] %ld\n",s2,n);
            zsout(ZTFILE,s);
            break;
        case F100:                      /* 4, "s1" */
            zsoutl(ZTFILE,s1);
            break;
        case F101:                      /* 5, "s1: n" */
            sprintf(sp,"%s: %ld\n",s1,n);
            zsout(ZTFILE,s);
            break;
        case F110:                      /* 6, "s1 s2" */
            x = strlen(s2);
            if (s2[x] == '\n') s2[x] = '\0';
            sprintf(sp,"%s %s\n",s1,s2);
            zsout(ZTFILE,s);
            break;
        case F111:                      /* 7, "s1 s2: n" */
            x = strlen(s2);
            if (s2[x] == '\n') s2[x] = '\0';
            sprintf(sp,"%s %s: %ld\n",s1,s2,n);
            zsout(ZTFILE,s);
            break;
        default:
            sprintf(sp,"\n?Invalid format for tlog() - %ld\n",n);
            zsout(ZTFILE,s);
    }
}
#endif