1 /* 2 * Copyright (c) 1982, 1986, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)prf.c 8.1 (Berkeley) 06/10/93 8 */ 9 10 /* 11 * XXX we know that scankbd is only called from read/write to interrupt 12 * a boot program. Since we restart only on ^C and we do that here, we 13 * always return 0 to avoid a longjmp in the caller. 14 */ 15 scankbd() 16 { 17 register int c; 18 19 c = cngetc(); 20 if (c == ('c'&037)) { 21 printf("^C"); 22 _stop(""); 23 /* NOTREACHED */ 24 } 25 return(0); 26 } 27 28 getchar() 29 { 30 register int c; 31 32 while((c = cngetc()) == 0) 33 ; 34 if (c == '\r') 35 c = '\n'; 36 else if (c == ('c'&037)) { 37 printf("^C"); 38 _stop(""); 39 /* NOTREACHED */ 40 } 41 if (c != '\b' && c != '\177') 42 putchar(c); 43 return(c); 44 } 45 46 putchar(c) 47 register int c; 48 { 49 cnputc(c); 50 if (c == '\n') 51 cnputc('\r'); 52 } 53