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78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/* Generate checksums of executables for PCH validation
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Copyright (C) 2005
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "bconfig.h"
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#include "system.h"
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#include "md5.h"
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static void
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usage (void)
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{
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fputs ("Usage: genchecksums <filename>\n", stderr);
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}
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static void
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dosum (const char *file)
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{
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FILE *f;
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unsigned char result[16];
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int i;
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f = fopen (file, "rb");
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if (!f)
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{
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fprintf (stderr, "opening %s: %s\n", file, xstrerror (errno));
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exit (1);
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}
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/* Some executable formats have timestamps in the first 16 bytes, yuck. */
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if (fseek (f, 16, SEEK_SET) != 0)
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{
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fprintf (stderr, "seeking in %s: %s\n", file, xstrerror (errno));
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exit (1);
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}
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if (md5_stream (f, result) != 0
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|| fclose (f) != 0)
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{
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fprintf (stderr, "reading %s: %s\n", file, xstrerror (errno));
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exit (1);
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}
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fputs ("const unsigned char executable_checksum[16] = { ", stdout);
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for (i = 0; i < 16; i++)
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printf ("%#02x%s", result[i], i == 15 ? " };\n" : ", ");
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}
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int
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main (int argc, char ** argv)
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{
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if (argc != 2)
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{
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usage ();
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return 1;
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}
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dosum (argv[1]);
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return 0;
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}
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