BSD 3 development

[unix-history] / .ref-BSD-2 / upgrade / libretro / typeof.c

#include <stdio.h>
/*
* typeof - return a 2 character teletype type code from /etc/ttywhere
* Bill Joy UCB September 24, 1977
*/
char    ttytype[]       "/etc/ttytype";

typeof(tty)
       char tty;
{
       register int c, c2;
       FILE *ibuf;

       if ((ibuf = fopen(ttytype, "r")) == NULL)
               goto unknown;
       for (;;) {
               c = getc(ibuf);
               if (c == '\n' || c == -1) {
unknown:
                       fclose(ibuf);
                       return('uk');
               }
               if (c == tty) {
                       c = getc(ibuf);
                       if (c == '\n' || c == -1)
                               goto unknown;
                       c2 = getc(ibuf);
                       if (c2 == '\n' || c2 == -1)
                               goto unknown;
                       fclose(ibuf);
                       return (c2 << 8 | c);
               }
               do
                       c = getc(ibuf);
               while (c != '\n' && c != -1);
       }
}

stypeof(tty)
       int tty;
{
       static char stype[3];

       tty = typeof(tty);
       stype[0] = tty& 0377;
       stype[1] = (tty >> 8) & 0377;
       return (stype);
}