1/* $FreeBSD$ */
2
3/*-
4 * Copyright (c) 2011 Hans Petter Selasky. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <stdio.h>
29#include <stdint.h>
30#include <stdlib.h>
31#include <fcntl.h>
32#include <err.h>
33#include <sysexits.h>
34#include <unistd.h>
35
36#include "bus_load_file.h"
37
38void
39load_file(const char *fname, uint8_t **pptr, uint32_t *plen)
40{
41	uint8_t *ptr;
42	ssize_t len;
43	off_t off;
44	int f;
45
46	f = open(fname, O_RDONLY);
47	if (f < 0)
48		err(EX_NOINPUT, "Cannot open file '%s'", fname);
49
50	off = lseek(f, 0, SEEK_END);
51	if (off < 0) {
52		err(EX_NOINPUT, "Cannot seek to "
53		    "end of file '%s'", fname);
54	}
55
56	if (lseek(f, 0, SEEK_SET) < 0) {
57		err(EX_NOINPUT, "Cannot seek to "
58		    "beginning of file '%s'", fname);
59	}
60
61	len = off;
62	if (len != off)
63		err(EX_NOINPUT, "File '%s' is too big", fname);
64
65	ptr = malloc(len);
66	if (ptr == NULL)
67		errx(EX_SOFTWARE, "Out of memory");
68
69	if (read(f, ptr, len) != len)
70		err(EX_NOINPUT, "Cannot read all data");
71
72	close(f);
73
74	*pptr = ptr;
75	*plen = len;
76}
77