1 /* $NetBSD: fgetln.c,v 1.7 2006/08/26 16:24:29 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. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "nbtool_config.h" 36 37 #if !HAVE_FGETLN 38 #include <stdlib.h> 39 #ifdef notdef 40 /* These headers are required, but included from nbtool_config.h */ 41 #include <stdio.h> 42 #include <unistd.h> 43 #include <errno.h> 44 #include <string.h> 45 #endif 46 47 char * 48 fgetln(FILE *fp, size_t *len) 49 { 50 static char *buf = NULL; 51 static size_t bufsiz = 0; 52 char *ptr; 53 54 55 if (buf == NULL) { 56 bufsiz = BUFSIZ; 57 if ((buf = malloc(bufsiz)) == NULL) 58 return NULL; 59 } 60 61 if (fgets(buf, bufsiz, fp) == NULL) 62 return NULL; 63 64 *len = 0; 65 while ((ptr = strchr(&buf[*len], '\n')) == NULL) { 66 size_t nbufsiz = bufsiz + BUFSIZ; 67 char *nbuf = realloc(buf, nbufsiz); 68 69 if (nbuf == NULL) { 70 int oerrno = errno; 71 free(buf); 72 errno = oerrno; 73 buf = NULL; 74 return NULL; 75 } else 76 buf = nbuf; 77 78 *len = bufsiz; 79 if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL) 80 return buf; 81 82 bufsiz = nbufsiz; 83 } 84 85 *len = (ptr - buf) + 1; 86 return buf; 87 } 88 89 #endif 90