1*4a5d661aSToomas Soome /* $NetBSD: gets.c,v 1.6 1995/10/11 21:16:57 pk Exp $ */ 2*4a5d661aSToomas Soome 3*4a5d661aSToomas Soome /*- 4*4a5d661aSToomas Soome * Copyright (c) 1993 5*4a5d661aSToomas Soome * The Regents of the University of California. All rights reserved. 6*4a5d661aSToomas Soome * 7*4a5d661aSToomas Soome * Redistribution and use in source and binary forms, with or without 8*4a5d661aSToomas Soome * modification, are permitted provided that the following conditions 9*4a5d661aSToomas Soome * are met: 10*4a5d661aSToomas Soome * 1. Redistributions of source code must retain the above copyright 11*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer. 12*4a5d661aSToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 13*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer in the 14*4a5d661aSToomas Soome * documentation and/or other materials provided with the distribution. 15*4a5d661aSToomas Soome * 4. Neither the name of the University nor the names of its contributors 16*4a5d661aSToomas Soome * may be used to endorse or promote products derived from this software 17*4a5d661aSToomas Soome * without specific prior written permission. 18*4a5d661aSToomas Soome * 19*4a5d661aSToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20*4a5d661aSToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21*4a5d661aSToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22*4a5d661aSToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23*4a5d661aSToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24*4a5d661aSToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25*4a5d661aSToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26*4a5d661aSToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27*4a5d661aSToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28*4a5d661aSToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29*4a5d661aSToomas Soome * SUCH DAMAGE. 30*4a5d661aSToomas Soome * 31*4a5d661aSToomas Soome * @(#)gets.c 8.1 (Berkeley) 6/11/93 32*4a5d661aSToomas Soome */ 33*4a5d661aSToomas Soome 34*4a5d661aSToomas Soome #include <sys/cdefs.h> 35*4a5d661aSToomas Soome __FBSDID("$FreeBSD$"); 36*4a5d661aSToomas Soome 37*4a5d661aSToomas Soome #include "stand.h" 38*4a5d661aSToomas Soome 39*4a5d661aSToomas Soome /* gets() with constrained input length */ 40*4a5d661aSToomas Soome 41*4a5d661aSToomas Soome void 42*4a5d661aSToomas Soome ngets(char *buf, int n) 43*4a5d661aSToomas Soome { 44*4a5d661aSToomas Soome int c; 45*4a5d661aSToomas Soome char *lp; 46*4a5d661aSToomas Soome 47*4a5d661aSToomas Soome for (lp = buf;;) 48*4a5d661aSToomas Soome switch (c = getchar() & 0177) { 49*4a5d661aSToomas Soome case '\n': 50*4a5d661aSToomas Soome case '\r': 51*4a5d661aSToomas Soome *lp = '\0'; 52*4a5d661aSToomas Soome putchar('\n'); 53*4a5d661aSToomas Soome return; 54*4a5d661aSToomas Soome case '\b': 55*4a5d661aSToomas Soome case '\177': 56*4a5d661aSToomas Soome if (lp > buf) { 57*4a5d661aSToomas Soome lp--; 58*4a5d661aSToomas Soome putchar('\b'); 59*4a5d661aSToomas Soome putchar(' '); 60*4a5d661aSToomas Soome putchar('\b'); 61*4a5d661aSToomas Soome } 62*4a5d661aSToomas Soome break; 63*4a5d661aSToomas Soome case 'r'&037: { 64*4a5d661aSToomas Soome char *p; 65*4a5d661aSToomas Soome 66*4a5d661aSToomas Soome putchar('\n'); 67*4a5d661aSToomas Soome for (p = buf; p < lp; ++p) 68*4a5d661aSToomas Soome putchar(*p); 69*4a5d661aSToomas Soome break; 70*4a5d661aSToomas Soome } 71*4a5d661aSToomas Soome case 'u'&037: 72*4a5d661aSToomas Soome case 'w'&037: 73*4a5d661aSToomas Soome lp = buf; 74*4a5d661aSToomas Soome putchar('\n'); 75*4a5d661aSToomas Soome break; 76*4a5d661aSToomas Soome default: 77*4a5d661aSToomas Soome if ((n < 1) || ((lp - buf) < n - 1)) { 78*4a5d661aSToomas Soome *lp++ = c; 79*4a5d661aSToomas Soome putchar(c); 80*4a5d661aSToomas Soome } 81*4a5d661aSToomas Soome } 82*4a5d661aSToomas Soome /*NOTREACHED*/ 83*4a5d661aSToomas Soome } 84*4a5d661aSToomas Soome 85*4a5d661aSToomas Soome int 86*4a5d661aSToomas Soome fgetstr(char *buf, int size, int fd) 87*4a5d661aSToomas Soome { 88*4a5d661aSToomas Soome char c; 89*4a5d661aSToomas Soome int err, len; 90*4a5d661aSToomas Soome 91*4a5d661aSToomas Soome size--; /* leave space for terminator */ 92*4a5d661aSToomas Soome len = 0; 93*4a5d661aSToomas Soome while (size != 0) { 94*4a5d661aSToomas Soome err = read(fd, &c, sizeof(c)); 95*4a5d661aSToomas Soome if (err < 0) /* read error */ 96*4a5d661aSToomas Soome return(-1); 97*4a5d661aSToomas Soome if (err == 0) { /* EOF */ 98*4a5d661aSToomas Soome if (len == 0) 99*4a5d661aSToomas Soome return(-1); /* nothing to read */ 100*4a5d661aSToomas Soome break; 101*4a5d661aSToomas Soome } 102*4a5d661aSToomas Soome if ((c == '\r') || /* line terminators */ 103*4a5d661aSToomas Soome (c == '\n')) 104*4a5d661aSToomas Soome break; 105*4a5d661aSToomas Soome *buf++ = c; /* keep char */ 106*4a5d661aSToomas Soome size--; 107*4a5d661aSToomas Soome len++; 108*4a5d661aSToomas Soome } 109*4a5d661aSToomas Soome *buf = 0; 110*4a5d661aSToomas Soome return(len); 111*4a5d661aSToomas Soome } 112*4a5d661aSToomas Soome 113