1b528cefcSMark Murray /* 2b528cefcSMark Murray * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H�gskolan 3b528cefcSMark Murray * (Royal Institute of Technology, Stockholm, Sweden). 4b528cefcSMark Murray * All rights reserved. 5b528cefcSMark Murray * 6b528cefcSMark Murray * Redistribution and use in source and binary forms, with or without 7b528cefcSMark Murray * modification, are permitted provided that the following conditions 8b528cefcSMark Murray * are met: 9b528cefcSMark Murray * 10b528cefcSMark Murray * 1. Redistributions of source code must retain the above copyright 11b528cefcSMark Murray * notice, this list of conditions and the following disclaimer. 12b528cefcSMark Murray * 13b528cefcSMark Murray * 2. Redistributions in binary form must reproduce the above copyright 14b528cefcSMark Murray * notice, this list of conditions and the following disclaimer in the 15b528cefcSMark Murray * documentation and/or other materials provided with the distribution. 16b528cefcSMark Murray * 17b528cefcSMark Murray * 3. Neither the name of the Institute nor the names of its contributors 18b528cefcSMark Murray * may be used to endorse or promote products derived from this software 19b528cefcSMark Murray * without specific prior written permission. 20b528cefcSMark Murray * 21b528cefcSMark Murray * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22b528cefcSMark Murray * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23b528cefcSMark Murray * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24b528cefcSMark Murray * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25b528cefcSMark Murray * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26b528cefcSMark Murray * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27b528cefcSMark Murray * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28b528cefcSMark Murray * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29b528cefcSMark Murray * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30b528cefcSMark Murray * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31b528cefcSMark Murray * SUCH DAMAGE. 32b528cefcSMark Murray */ 33b528cefcSMark Murray 34b528cefcSMark Murray #include "common.h" 35b528cefcSMark Murray #include <stdio.h> 36b528cefcSMark Murray #include <err.h> 37b528cefcSMark Murray #include "roken.h" 38b528cefcSMark Murray 39b528cefcSMark Murray RCSID("$Id: buffer.c,v 1.3 1999/12/02 16:58:29 joda Exp $"); 40b528cefcSMark Murray 41b528cefcSMark Murray /* 42b528cefcSMark Murray * Allocate a buffer enough to handle st->st_blksize, if 43b528cefcSMark Murray * there is such a field, otherwise BUFSIZ. 44b528cefcSMark Murray */ 45b528cefcSMark Murray 46b528cefcSMark Murray void * 47b528cefcSMark Murray alloc_buffer (void *oldbuf, size_t *sz, struct stat *st) 48b528cefcSMark Murray { 49b528cefcSMark Murray size_t new_sz; 50b528cefcSMark Murray 51b528cefcSMark Murray new_sz = BUFSIZ; 52b528cefcSMark Murray #ifdef HAVE_ST_BLKSIZE 53b528cefcSMark Murray if (st) 54b528cefcSMark Murray new_sz = max(BUFSIZ, st->st_blksize); 55b528cefcSMark Murray #endif 56b528cefcSMark Murray if(new_sz > *sz) { 57b528cefcSMark Murray if (oldbuf) 58b528cefcSMark Murray free (oldbuf); 59b528cefcSMark Murray oldbuf = malloc (new_sz); 60b528cefcSMark Murray if (oldbuf == NULL) { 61b528cefcSMark Murray warn ("malloc"); 62b528cefcSMark Murray *sz = 0; 63b528cefcSMark Murray return NULL; 64b528cefcSMark Murray } 65b528cefcSMark Murray *sz = new_sz; 66b528cefcSMark Murray } 67b528cefcSMark Murray return oldbuf; 68b528cefcSMark Murray } 69b528cefcSMark Murray 70