diff options
| -rw-r--r-- | tools/padjffs2/src/padjffs2.c | 66 |
1 files changed, 49 insertions, 17 deletions
diff --git a/tools/padjffs2/src/padjffs2.c b/tools/padjffs2/src/padjffs2.c index aa932ef..59c7625 100644 --- a/tools/padjffs2/src/padjffs2.c +++ b/tools/padjffs2/src/padjffs2.c @@ -21,6 +21,10 @@ static char *progname; static unsigned int xtra_offset; static unsigned char eof_mark[4] = {0xde, 0xad, 0xc0, 0xde}; +static unsigned char jffs2_pad_be[] = "\x19\x85\x20\x04\x04\x00\x00\x00\xc4\x94\xdb\xf4"; +static unsigned char jffs2_pad_le[] = "\x85\x19\x04\x20\x00\x00\x00\x04\xa8\xfb\xa0\xb4"; +static unsigned char *pad = eof_mark; +static int pad_len = sizeof(eof_mark); #define ERR(fmt, ...) do { \ fflush(0); \ @@ -105,12 +109,12 @@ static int pad_image(char *name, uint32_t pad_mask) } /* write out the JFFS end-of-filesystem marker */ - t = write(fd, eof_mark, 4); - if (t != 4) { + t = write(fd, pad, pad_len); + if (t != pad_len) { ERRS("Unable to write to %s", name); goto close; } - out_len += 4; + out_len += pad_len; } ret = 0; @@ -123,39 +127,67 @@ out: return ret; } +static int usage(void) +{ + fprintf(stderr, + "Usage: %s file [<options>] [pad0] [pad1] [padN]\n" + "Options:\n" + " -x <offset>: Add an extra offset for padding data\n" + " -J: Use a fake big-endian jffs2 padding element instead of EOF\n" + " This is used to work around broken boot loaders that\n" + " try to parse the entire firmware area as one big jffs2\n" + " -j: (like -J, but little-endian instead of big-endian)\n" + "\n", + progname); + return EXIT_FAILURE; +} + int main(int argc, char* argv[]) { + char *image; uint32_t pad_mask; int ret = EXIT_FAILURE; int err; - int i; + int ch, i; progname = basename(argv[0]); - if (argc < 2) { - fprintf(stderr, - "Usage: %s file [-x <xtra offset>] [pad0] [pad1] [padN]\n", - progname); - goto out; - } + if (argc < 2) + return usage(); + + image = argv[1]; + argv++; + argc--; pad_mask = 0; - for (i = 2; i < argc; i++) { - if (i == 2 && strcmp(argv[i], "-x") == 0) { - i++; - xtra_offset = strtoul(argv[i], NULL, 0); + while ((ch = getopt(argc, argv, "x:Jj")) != -1) { + switch (ch) { + case 'x': + xtra_offset = strtoul(optarg, NULL, 0); fprintf(stderr, "assuming %u bytes offset\n", xtra_offset); - continue; + break; + case 'J': + pad = jffs2_pad_be; + pad_len = sizeof(jffs2_pad_be) - 1; + break; + case 'j': + pad = jffs2_pad_le; + pad_len = sizeof(jffs2_pad_le) - 1; + break; + default: + return usage(); } - pad_mask |= strtoul(argv[i], NULL, 0) * 1024; } + for (i = optind; i < argc; i++) + pad_mask |= strtoul(argv[i], NULL, 0) * 1024; + if (pad_mask == 0) pad_mask = (4 * 1024) | (8 * 1024) | (64 * 1024) | (128 * 1024); - err = pad_image(argv[1], pad_mask); + err = pad_image(image, pad_mask); if (err) goto out; |