1/* $NetBSD: fgetln.c,v 1.9 2008/04/29 06:53:03 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#ifdef HAVE_NBTOOL_CONFIG_H 33#include "nbtool_config.h" 34#endif 35 36#if !HAVE_FGETLN 37#include "config.h" 38#include <stdlib.h> 39#ifndef HAVE_NBTOOL_CONFIG_H 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 47char * 48fgetln(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 if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL) { 79 buf[bufsiz] = '\0'; 80 *len = strlen(buf); 81 return buf; 82 } 83 84 *len = bufsiz; 85 bufsiz = nbufsiz; 86 } 87 88 *len = (ptr - buf) + 1; 89 return buf; 90} 91 92#endif 93 94#ifdef TEST 95int 96main(int argc, char *argv[]) 97{ 98 char *p; 99 size_t len; 100 101 while ((p = fgetln(stdin, &len)) != NULL) { 102 (void)printf("%zu %s", len, p); 103 free(p); 104 } 105 return 0; 106} 107#endif 108