Contents of /trunk/linterm_tools/fw_builder/bundle-tools/fwcs.c
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Mon Jan 14 16:57:24 2008 UTC (16 years, 8 months ago) by niro
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Mon Jan 14 16:57:24 2008 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 1513 byte(s)
initial import
1 | /* |
2 | A small tool to calculate Wyse WinTerm firmware image checksums |
3 | Copyright (C) 2005 Wilmer van der Gaast <wilmer@gaast.net> |
4 | |
5 | This program is free software; you can redistribute it and/or |
6 | modify it under the terms of the second version of the GNU |
7 | General Public License as published by the Free Software |
8 | Foundation. |
9 | |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
18 | */ |
19 | |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> |
22 | #include <fcntl.h> |
23 | #include <unistd.h> |
24 | #include <stdio.h> |
25 | |
26 | #if BYTE_ORDER == BIG_ENDIAN |
27 | #define cvt32(x) ((((x)&0xff)<<24) | (((x)&0xff00)<<8) | (((x)&0xff0000)>>8) | (((x)&0xff000000)>>24)) |
28 | #else |
29 | #define cvt32(x) (x) |
30 | #endif |
31 | |
32 | int main( int argc, char *argv[] ) |
33 | { |
34 | unsigned int checksum = 0xFFFE1000; |
35 | unsigned int tmp; |
36 | int fd; |
37 | |
38 | if( argc < 2 ) |
39 | { |
40 | fprintf( stderr, "Invalid number of arguments!\n" ); |
41 | return( 1 ); |
42 | } |
43 | |
44 | fd = open( argv[1], O_RDONLY ); |
45 | if( fd < 0 ) |
46 | { |
47 | perror( "open" ); |
48 | return( 1 ); |
49 | } |
50 | |
51 | while( read( fd, &tmp, 4 ) > 0 ) |
52 | { |
53 | checksum -= cvt32( tmp ); |
54 | tmp = 0; |
55 | } |
56 | |
57 | printf( "%08x\n", checksum ); |
58 | |
59 | return( 0 ); |
60 | } |