gets.c revision 1.1.20.2
1 1.1.20.2 rpaulo /* $NetBSD: gets.c,v 1.1.20.2 2006/09/09 02:40:39 rpaulo Exp $ */ 2 1.1.20.2 rpaulo 3 1.1.20.2 rpaulo /*- 4 1.1.20.2 rpaulo * Copyright (c) 1993 5 1.1.20.2 rpaulo * The Regents of the University of California. All rights reserved. 6 1.1.20.2 rpaulo * 7 1.1.20.2 rpaulo * Redistribution and use in source and binary forms, with or without 8 1.1.20.2 rpaulo * modification, are permitted provided that the following conditions 9 1.1.20.2 rpaulo * are met: 10 1.1.20.2 rpaulo * 1. Redistributions of source code must retain the above copyright 11 1.1.20.2 rpaulo * notice, this list of conditions and the following disclaimer. 12 1.1.20.2 rpaulo * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.20.2 rpaulo * notice, this list of conditions and the following disclaimer in the 14 1.1.20.2 rpaulo * documentation and/or other materials provided with the distribution. 15 1.1.20.2 rpaulo * 3. All advertising materials mentioning features or use of this software 16 1.1.20.2 rpaulo * must display the following acknowledgement: 17 1.1.20.2 rpaulo * This product includes software developed by the University of 18 1.1.20.2 rpaulo * California, Berkeley and its contributors. 19 1.1.20.2 rpaulo * 4. Neither the name of the University nor the names of its contributors 20 1.1.20.2 rpaulo * may be used to endorse or promote products derived from this software 21 1.1.20.2 rpaulo * without specific prior written permission. 22 1.1.20.2 rpaulo * 23 1.1.20.2 rpaulo * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 1.1.20.2 rpaulo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 1.1.20.2 rpaulo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 1.1.20.2 rpaulo * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 1.1.20.2 rpaulo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 1.1.20.2 rpaulo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 1.1.20.2 rpaulo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 1.1.20.2 rpaulo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 1.1.20.2 rpaulo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 1.1.20.2 rpaulo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 1.1.20.2 rpaulo * SUCH DAMAGE. 34 1.1.20.2 rpaulo * 35 1.1.20.2 rpaulo * @(#)gets.c 8.1 (Berkeley) 6/11/93 36 1.1.20.2 rpaulo */ 37 1.1.20.2 rpaulo 38 1.1.20.2 rpaulo #include <sys/cdefs.h> 39 1.1.20.2 rpaulo 40 1.1.20.2 rpaulo #include "bootstrap.h" 41 1.1.20.2 rpaulo 42 1.1.20.2 rpaulo /* gets() with constrained input length */ 43 1.1.20.2 rpaulo 44 1.1.20.2 rpaulo void 45 1.1.20.2 rpaulo ngets(char *buf, int n) 46 1.1.20.2 rpaulo { 47 1.1.20.2 rpaulo int c; 48 1.1.20.2 rpaulo char *lp; 49 1.1.20.2 rpaulo 50 1.1.20.2 rpaulo for (lp = buf;;) 51 1.1.20.2 rpaulo switch (c = getchar() & 0177) { 52 1.1.20.2 rpaulo case '\n': 53 1.1.20.2 rpaulo case '\r': 54 1.1.20.2 rpaulo *lp = '\0'; 55 1.1.20.2 rpaulo putchar('\n'); 56 1.1.20.2 rpaulo return; 57 1.1.20.2 rpaulo case '\b': 58 1.1.20.2 rpaulo case '\177': 59 1.1.20.2 rpaulo if (lp > buf) { 60 1.1.20.2 rpaulo lp--; 61 1.1.20.2 rpaulo putchar('\b'); 62 1.1.20.2 rpaulo putchar(' '); 63 1.1.20.2 rpaulo putchar('\b'); 64 1.1.20.2 rpaulo } 65 1.1.20.2 rpaulo break; 66 1.1.20.2 rpaulo case 'r'&037: { 67 1.1.20.2 rpaulo char *p; 68 1.1.20.2 rpaulo 69 1.1.20.2 rpaulo putchar('\n'); 70 1.1.20.2 rpaulo for (p = buf; p < lp; ++p) 71 1.1.20.2 rpaulo putchar(*p); 72 1.1.20.2 rpaulo break; 73 1.1.20.2 rpaulo } 74 1.1.20.2 rpaulo case 'u'&037: 75 1.1.20.2 rpaulo case 'w'&037: 76 1.1.20.2 rpaulo lp = buf; 77 1.1.20.2 rpaulo putchar('\n'); 78 1.1.20.2 rpaulo break; 79 1.1.20.2 rpaulo default: 80 1.1.20.2 rpaulo if ((n < 1) || ((lp - buf) < n)) { 81 1.1.20.2 rpaulo *lp++ = c; 82 1.1.20.2 rpaulo putchar(c); 83 1.1.20.2 rpaulo } 84 1.1.20.2 rpaulo } 85 1.1.20.2 rpaulo /*NOTREACHED*/ 86 1.1.20.2 rpaulo } 87 1.1.20.2 rpaulo 88 1.1.20.2 rpaulo int 89 1.1.20.2 rpaulo fgetstr(char *buf, int size, int fd) 90 1.1.20.2 rpaulo { 91 1.1.20.2 rpaulo char c; 92 1.1.20.2 rpaulo int err, len; 93 1.1.20.2 rpaulo 94 1.1.20.2 rpaulo size--; /* leave space for terminator */ 95 1.1.20.2 rpaulo len = 0; 96 1.1.20.2 rpaulo while (size != 0) { 97 1.1.20.2 rpaulo err = read(fd, &c, sizeof(c)); 98 1.1.20.2 rpaulo if (err < 0) /* read error */ 99 1.1.20.2 rpaulo return(-1); 100 1.1.20.2 rpaulo if (err == 0) { /* EOF */ 101 1.1.20.2 rpaulo if (len == 0) 102 1.1.20.2 rpaulo return(-1); /* nothing to read */ 103 1.1.20.2 rpaulo break; 104 1.1.20.2 rpaulo } 105 1.1.20.2 rpaulo if ((c == '\r') || /* line terminators */ 106 1.1.20.2 rpaulo (c == '\n')) 107 1.1.20.2 rpaulo break; 108 1.1.20.2 rpaulo *buf++ = c; /* keep char */ 109 1.1.20.2 rpaulo size--; 110 1.1.20.2 rpaulo len++; 111 1.1.20.2 rpaulo } 112 1.1.20.2 rpaulo *buf = 0; 113 1.1.20.2 rpaulo return(len); 114 1.1.20.2 rpaulo } 115
Indexes created Sat Oct 11 13:09:53 GMT 2025