1 /* $NetBSD: fgetln.c,v 1.6 2005/05/15 21:31:26 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include "nbtool_config.h" 40 41 #if !HAVE_FGETLN 42 #include <stdlib.h> 43 #ifdef notdef 44 /* These headers are required, but included from nbtool_config.h */ 45 #include <stdio.h> 46 #include <unistd.h> 47 #include <errno.h> 48 #include <string.h> 49 #endif 50 51 char * 52 fgetln(FILE *fp, size_t *len) 53 { 54 static char *buf = NULL; 55 static size_t bufsiz = 0; 56 char *ptr; 57 58 59 if (buf == NULL) { 60 bufsiz = BUFSIZ; 61 if ((buf = malloc(bufsiz)) == NULL) 62 return NULL; 63 } 64 65 if (fgets(buf, bufsiz, fp) == NULL) 66 return NULL; 67 68 *len = 0; 69 while ((ptr = strchr(&buf[*len], '\n')) == NULL) { 70 size_t nbufsiz = bufsiz + BUFSIZ; 71 char *nbuf = realloc(buf, nbufsiz); 72 73 if (nbuf == NULL) { 74 int oerrno = errno; 75 free(buf); 76 errno = oerrno; 77 buf = NULL; 78 return NULL; 79 } else 80 buf = nbuf; 81 82 *len = bufsiz; 83 if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL) 84 return buf; 85 86 bufsiz = nbufsiz; 87 } 88 89 *len = (ptr - buf) + 1; 90 return buf; 91 } 92 93 #endif 94