155682Smarkm/*
2233294Sstas * Copyright (c) 1995-2000 Kungliga Tekniska H��gskolan
355682Smarkm * (Royal Institute of Technology, Stockholm, Sweden).
455682Smarkm * All rights reserved.
5233294Sstas *
655682Smarkm * Redistribution and use in source and binary forms, with or without
755682Smarkm * modification, are permitted provided that the following conditions
855682Smarkm * are met:
9233294Sstas *
1055682Smarkm * 1. Redistributions of source code must retain the above copyright
1155682Smarkm *    notice, this list of conditions and the following disclaimer.
12233294Sstas *
1355682Smarkm * 2. Redistributions in binary form must reproduce the above copyright
1455682Smarkm *    notice, this list of conditions and the following disclaimer in the
1555682Smarkm *    documentation and/or other materials provided with the distribution.
16233294Sstas *
1755682Smarkm * 3. Neither the name of the Institute nor the names of its contributors
1855682Smarkm *    may be used to endorse or promote products derived from this software
1955682Smarkm *    without specific prior written permission.
20233294Sstas *
2155682Smarkm * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
2255682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2355682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2455682Smarkm * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
2555682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2655682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2755682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2855682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2955682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3055682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3155682Smarkm * SUCH DAMAGE.
3255682Smarkm */
3355682Smarkm
3455682Smarkm#include "common.h"
3555682Smarkm#include <stdio.h>
3655682Smarkm#include <err.h>
3755682Smarkm#include "roken.h"
3855682Smarkm
39233294SstasRCSID("$Id$");
4055682Smarkm
4155682Smarkm/*
4255682Smarkm * Allocate a buffer enough to handle st->st_blksize, if
4355682Smarkm * there is such a field, otherwise BUFSIZ.
4455682Smarkm */
4555682Smarkm
4655682Smarkmvoid *
4755682Smarkmalloc_buffer (void *oldbuf, size_t *sz, struct stat *st)
4855682Smarkm{
4955682Smarkm    size_t new_sz;
5055682Smarkm
5155682Smarkm    new_sz = BUFSIZ;
5272445Sassar#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
5355682Smarkm    if (st)
5455682Smarkm	new_sz = max(BUFSIZ, st->st_blksize);
5555682Smarkm#endif
5655682Smarkm    if(new_sz > *sz) {
5755682Smarkm	if (oldbuf)
5855682Smarkm	    free (oldbuf);
5955682Smarkm	oldbuf = malloc (new_sz);
6055682Smarkm	if (oldbuf == NULL) {
6155682Smarkm	    warn ("malloc");
6255682Smarkm	    *sz = 0;
6355682Smarkm	    return NULL;
6455682Smarkm	}
6555682Smarkm	*sz = new_sz;
6655682Smarkm    }
6755682Smarkm    return oldbuf;
6855682Smarkm}
6955682Smarkm
70