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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /scripts/binoffset.c | |
download | kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'scripts/binoffset.c')
-rw-r--r-- | scripts/binoffset.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/scripts/binoffset.c b/scripts/binoffset.c new file mode 100644 index 0000000..591309d --- /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 */ |