| 1 | /*
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| 2 | * Copyright (c) 1995-2000 Kungliga Tekniska Högskolan
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| 3 | * (Royal Institute of Technology, Stockholm, Sweden).
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | *
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | *
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| 17 | * 3. Neither the name of the Institute nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | */
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| 33 |
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| 34 | #include "common.h"
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| 35 | #include <stdio.h>
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| 36 | #include <err.h>
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| 37 | #include "roken.h"
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| 38 |
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| 39 | RCSID("$Id$");
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| 40 |
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| 41 | /*
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| 42 | * Allocate a buffer enough to handle st->st_blksize, if
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| 43 | * there is such a field, otherwise BUFSIZ.
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| 44 | */
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| 45 |
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| 46 | void *
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| 47 | alloc_buffer (void *oldbuf, size_t *sz, struct stat *st)
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| 48 | {
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| 49 | size_t new_sz;
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| 50 |
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| 51 | new_sz = BUFSIZ;
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| 52 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
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| 53 | if (st)
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| 54 | new_sz = max(BUFSIZ, st->st_blksize);
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| 55 | #endif
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| 56 | if(new_sz > *sz) {
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| 57 | if (oldbuf)
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| 58 | free (oldbuf);
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| 59 | oldbuf = malloc (new_sz);
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| 60 | if (oldbuf == NULL) {
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| 61 | warn ("malloc");
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| 62 | *sz = 0;
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| 63 | return NULL;
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| 64 | }
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| 65 | *sz = new_sz;
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| 66 | }
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| 67 | return oldbuf;
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| 68 | }
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| 69 |
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