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gets.c revision 1.7 
      1 /*	$NetBSD: gets.c,v 1.7 2000/03/30 12:19:48 augustss 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)gets.c	8.1 (Berkeley) 6/11/93
     36  */
     37 
     38 #include "stand.h"
     39 
     40 void
     41 gets(buf)
     42 	char *buf;
     43 {
     44 	int c;
     45 	char *lp;
     46 
     47 	for (lp = buf;;)
     48 		switch (c = getchar() & 0177) {
     49 		case '\n':
     50 		case '\r':
     51 			*lp = '\0';
     52 			putchar('\n');
     53 			return;
     54 		case '\b':
     55 		case '\177':
     56 			if (lp > buf) {
     57 				lp--;
     58 				putchar('\b');
     59 				putchar(' ');
     60 				putchar('\b');
     61 			}
     62 			break;
     63 #if HASH_ERASE
     64 		case '#':
     65 			if (lp > buf)
     66 				--lp;
     67 			break;
     68 #endif
     69 		case 'r'&037: {
     70 			char *p;
     71 
     72 			putchar('\n');
     73 			for (p = buf; p < lp; ++p)
     74 				putchar(*p);
     75 			break;
     76 		}
     77 #if AT_ERASE
     78 		case '@':
     79 #endif
     80 		case 'u'&037:
     81 		case 'w'&037:
     82 			lp = buf;
     83 			putchar('\n');
     84 			break;
     85 		default:
     86 			*lp++ = c;
     87 			putchar(c);
     88 		}
     89 	/*NOTREACHED*/
     90 }
     91