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gets.c revision 1.7.28.3 
      1 /*	$NetBSD: gets.c,v 1.7.28.3 2004/09/21 13:36:18 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)gets.c	8.1 (Berkeley) 6/11/93
     32  */
     33 
     34 #include "stand.h"
     35 
     36 void
     37 gets(buf)
     38 	char *buf;
     39 {
     40 	int c;
     41 	char *lp;
     42 
     43 	for (lp = buf;;)
     44 		switch (c = getchar() & 0177) {
     45 		case '\n':
     46 		case '\r':
     47 			*lp = '\0';
     48 			putchar('\n');
     49 			return;
     50 		case '\b':
     51 		case '\177':
     52 			if (lp > buf) {
     53 				lp--;
     54 				putchar('\b');
     55 				putchar(' ');
     56 				putchar('\b');
     57 			}
     58 			break;
     59 #if HASH_ERASE
     60 		case '#':
     61 			if (lp > buf)
     62 				--lp;
     63 			break;
     64 #endif
     65 		case 'r'&037: {
     66 			char *p;
     67 
     68 			putchar('\n');
     69 			for (p = buf; p < lp; ++p)
     70 				putchar(*p);
     71 			break;
     72 		}
     73 #if AT_ERASE
     74 		case '@':
     75 #endif
     76 		case 'u'&037:
     77 		case 'w'&037:
     78 			lp = buf;
     79 			putchar('\n');
     80 			break;
     81 		default:
     82 			*lp++ = c;
     83 			putchar(c);
     84 		}
     85 	/*NOTREACHED*/
     86 }
     87