2 * Copyright (c) 2016 FUKAUMI Naoki <naobsd@gmail.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
19 #include "buffalo-lib.h"
21 #define DHP_HEADER_SIZE 20
23 static char *progname;
29 fprintf(stderr, "usage: %s <in> <out>\n", progname);
34 main(int argc, char *argv[])
47 if ((in = open(argv[1], O_RDONLY)) == -1)
48 err(EXIT_FAILURE, "%s", argv[1]);
50 if (fstat(in, &in_st) == -1)
51 err(EXIT_FAILURE, "%s", argv[1]);
53 size = DHP_HEADER_SIZE + in_st.st_size;
55 if ((buf = malloc(size)) == NULL)
56 err(EXIT_FAILURE, "malloc");
58 memset(buf, 0, DHP_HEADER_SIZE);
63 buf[0xc] = (size >> 24) & 0xff;
64 buf[0xd] = (size >> 16) & 0xff;
65 buf[0xe] = (size >> 8) & 0xff;
66 buf[0xf] = size & 0xff;
68 read(in, &buf[DHP_HEADER_SIZE], in_st.st_size);
71 crc = buffalo_crc(buf, size);
72 buf[0x10] = (crc >> 24) & 0xff;
73 buf[0x11] = (crc >> 16) & 0xff;
74 buf[0x12] = (crc >> 8) & 0xff;
75 buf[0x13] = crc & 0xff;
77 if ((out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, 0644)) == -1)
78 err(EXIT_FAILURE, "%s", argv[2]);
79 write(out, buf, size);