diff options
Diffstat (limited to 'misc-utils/flash_otp_dump.c')
| -rw-r--r-- | misc-utils/flash_otp_dump.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/misc-utils/flash_otp_dump.c b/misc-utils/flash_otp_dump.c index f0c0fb9..f1e1782 100644 --- a/misc-utils/flash_otp_dump.c +++ b/misc-utils/flash_otp_dump.c @@ -10,16 +10,18 @@ #include <string.h> #include <errno.h> #include <sys/ioctl.h> +#include <stdlib.h> #include <mtd/mtd-user.h> int main(int argc,char *argv[]) { - int fd, val, i, offset, ret; + int fd, val, i, ret; + int offset = 0; unsigned char buf[16]; - if (argc != 3 || (strcmp(argv[1], "-f") && strcmp(argv[1], "-u"))) { - fprintf(stderr,"Usage: %s [ -f | -u ] <device>\n", PROGRAM_NAME); + if (argc <= 3 || (strcmp(argv[1], "-f") && strcmp(argv[1], "-u"))) { + fprintf(stderr,"Usage: %s [ -f | -u ] <device> [<offset>]\n", PROGRAM_NAME); return EINVAL; } @@ -36,9 +38,22 @@ int main(int argc,char *argv[]) return errno; } + if (argc >= 4) { + char *p; + offset = (off_t)strtoull(argv[3], &p, 0); + if (argv[3][0] == 0 || *p != 0) { + fprintf(stderr, "%s: bad offset value\n", PROGRAM_NAME); + return ERANGE; + } + } + + if (lseek(fd, offset, SEEK_SET) == (off_t)-1) { + perror("lseek()"); + return errno; + } + printf("OTP %s data for %s\n", argv[1][1] == 'f' ? "factory" : "user", argv[2]); - offset = 0; while ((ret = read(fd, buf, sizeof(buf)))) { if (ret < 0) { perror("read()"); |