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/* Generate checksums of executables for PCH validation
Copyright (C) 2005, 2007
Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "bconfig.h"
#include "system.h"
#include "md5.h"
static void
usage (void)
{
fputs ("Usage: genchecksums <filename>\n", stderr);
}
static void
dosum (const char *file)
{
FILE *f;
unsigned char result[16];
int i;
f = fopen (file, "rb");
if (!f)
{
fprintf (stderr, "opening %s: %s\n", file, xstrerror (errno));
exit (1);
}
/* Some executable formats have timestamps in the first 16 bytes, yuck. */
if (fseek (f, 16, SEEK_SET) != 0)
{
fprintf (stderr, "seeking in %s: %s\n", file, xstrerror (errno));
exit (1);
}
if (md5_stream (f, result) != 0
|| fclose (f) != 0)
{
fprintf (stderr, "reading %s: %s\n", file, xstrerror (errno));
exit (1);
}
fputs ("const unsigned char executable_checksum[16] = { ", stdout);
for (i = 0; i < 16; i++)
printf ("%#02x%s", result[i], i == 15 ? " };\n" : ", ");
}
int
main (int argc, char ** argv)
{
if (argc != 2)
{
usage ();
return 1;
}
dosum (argv[1]);
return 0;
}
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