1 files changed, 163 insertions, 0 deletions
diff --git a/scripts/binoffset.c b/scripts/binoffset.c
new file mode 100644
index 00000000000..591309d8551
--- /dev/null
+++ b/scripts/binoffset.c
@@ -0,0 +1,163 @@
+/***************************************************************************
+ * binoffset.c
+ * (C) 2002 Randy Dunlap <rddunlap@osdl.org>
+
+#   This program 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 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program 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 this program; if not, write to the Free Software
+#   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+# binoffset.c:
+# - searches a (binary) file for a specified (binary) pattern
+# - returns the offset of the located pattern or ~0 if not found
+# - exits with exit status 0 normally or non-0 if pattern is not found
+#   or any other error occurs.
+
+****************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#define VERSION		"0.1"
+#define BUF_SIZE	(16 * 1024)
+#define PAT_SIZE	100
+
+char		*progname;
+char		*inputname;
+int		inputfd;
+unsigned int	bix;			/* buf index */
+unsigned char	patterns [PAT_SIZE] = {0}; /* byte-sized pattern array */
+int		pat_len;		/* actual number of pattern bytes */
+unsigned char	*madr;			/* mmap address */
+size_t		filesize;
+int		num_matches = 0;
+off_t		firstloc = 0;
+
+void usage (void)
+{
+	fprintf (stderr, "%s ver. %s\n", progname, VERSION);
+	fprintf (stderr, "usage:  %s filename pattern_bytes\n",
+			progname);
+	fprintf (stderr, "        [prints location of pattern_bytes in file]\n");
+	exit (1);
+}
+
+void get_pattern (int pat_count, char *pats [])
+{
+	int ix, err, tmp;
+
+#ifdef DEBUG
+	fprintf (stderr,"get_pattern: count = %d\n", pat_count);
+	for (ix = 0; ix < pat_count; ix++)
+		fprintf (stderr, "  pat # %d:  [%s]\n", ix, pats[ix]);
+#endif
+
+	for (ix = 0; ix < pat_count; ix++) {
+		tmp = 0;
+		err = sscanf (pats[ix], "%5i", &tmp);
+		if (err != 1 || tmp > 0xff) {
+			fprintf (stderr, "pattern or value error in pattern # %d [%s]\n",
+					ix, pats[ix]);
+			usage ();
+		}
+		patterns [ix] = tmp;
+	}
+	pat_len = pat_count;
+}
+
+void search_pattern (void)
+{
+	for (bix = 0; bix < filesize; bix++) {
+		if (madr[bix] == patterns[0]) {
+			if (memcmp (&madr[bix], patterns, pat_len) == 0) {
+				if (num_matches == 0)
+					firstloc = bix;
+				num_matches++;
+			}
+		}
+	}
+}
+
+#ifdef NOTDEF
+size_t get_filesize (int fd)
+{
+	off_t end_off = lseek (fd, 0, SEEK_END);
+	lseek (fd, 0, SEEK_SET);
+	return (size_t) end_off;
+}
+#endif
+
+size_t get_filesize (int fd)
+{
+	int err;
+	struct stat stat;
+
+	err = fstat (fd, &stat);
+	fprintf (stderr, "filesize: %ld\n", err < 0 ? (long)err : stat.st_size);
+	if (err < 0)
+		return err;
+	return (size_t) stat.st_size;
+}
+
+int main (int argc, char *argv [])
+{
+	progname = argv[0];
+
+	if (argc < 3)
+		usage ();
+
+	get_pattern (argc - 2, argv + 2);
+
+	inputname = argv[1];
+
+	inputfd = open (inputname, O_RDONLY);
+	if (inputfd == -1) {
+		fprintf (stderr, "%s: cannot open '%s'\n",
+				progname, inputname);
+		exit (3);
+	}
+
+	filesize = get_filesize (inputfd);
+
+	madr = mmap (0, filesize, PROT_READ, MAP_PRIVATE, inputfd, 0);
+	if (madr == MAP_FAILED) {
+		fprintf (stderr, "mmap error = %d\n", errno);
+		close (inputfd);
+		exit (4);
+	}
+
+	search_pattern ();
+
+	if (munmap (madr, filesize))
+		fprintf (stderr, "munmap error = %d\n", errno);
+
+	if (close (inputfd))
+		fprintf (stderr, "%s: error %d closing '%s'\n",
+				progname, errno, inputname);
+
+	fprintf (stderr, "number of pattern matches = %d\n", num_matches);
+	if (num_matches == 0)
+		firstloc = ~0;
+	printf ("%ld\n", firstloc);
+	fprintf (stderr, "%ld\n", firstloc);
+
+	exit (num_matches ? 0 : 2);
+}
+
+/* end binoffset.c */