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path: root/misc-utils/flash_otp_dump.c
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Diffstat (limited to 'misc-utils/flash_otp_dump.c')
-rw-r--r--misc-utils/flash_otp_dump.c23
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()");