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authorBrian Norris <computersforpeace@gmail.com>2015-08-27 15:17:58 -0700
committerBrian Norris <computersforpeace@gmail.com>2015-11-11 14:05:36 -0800
commit4e2a2a22676eb8d3622c357ac6867d815500438f (patch)
treef50e694f1cb4b0e5fb7d34ccf12979c89f0bfeef /flash_unlock.c
parent27f481e9bca1f13781eb197b7362f2ce97c0220a (diff)
flash_{un,}lock: add MEMISLOCKED support
With the -i / --islocked flags. Sample output: # flash_lock --islocked /dev/mtd0 Device: /dev/mtd0 Start: 0 Len: 0x400000 Lock status: unlocked Return code: 0 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'flash_unlock.c')
-rw-r--r--flash_unlock.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/flash_unlock.c b/flash_unlock.c
index be09347..6443605 100644
--- a/flash_unlock.c
+++ b/flash_unlock.c
@@ -7,6 +7,7 @@
enum flash_lock_request {
REQUEST_LOCK,
REQUEST_UNLOCK,
+ REQUEST_ISLOCKED,
};
#ifndef PROGRAM_NAME
@@ -32,18 +33,21 @@ enum flash_lock_request {
static const char *flash_msg[] = {
[ REQUEST_LOCK ] = "lock",
[ REQUEST_UNLOCK ] = "unlock",
+ [ REQUEST_ISLOCKED ] = "check lock status",
};
static void usage(int status)
{
fprintf(status ? stderr : stdout,
- "Utility to lock or unlock the flash. Default action: %s\n"
+ "Utility to lock, unlock, or check the lock status of the flash.\n"
+ "Default action: %s\n"
"\n"
"Usage: %s [options] [--] <mtd device> [offset [block count]]\n"
"\n"
"Options:\n"
" -h --help Display this help and exit\n"
" --version Display version information and exit\n"
+ " -i --islocked Check if flash region is locked\n"
" -l --lock Lock a region of flash\n"
" -u --unlock Unlock a region of flash\n"
"\n"
@@ -54,9 +58,10 @@ static void usage(int status)
exit(status);
}
-static const char short_opts[] = "hlu";
+static const char short_opts[] = "hilu";
static const struct option long_opts[] = {
{ "help", no_argument, 0, 'h' },
+ { "islocked", no_argument, 0, 'i' },
{ "lock", no_argument, 0, 'l' },
{ "unlock", no_argument, 0, 'u' },
{ "version", no_argument, 0, 'v' },
@@ -83,6 +88,10 @@ static void process_args(int argc, char *argv[])
case 'h':
usage(0);
break;
+ case 'i':
+ req = REQUEST_ISLOCKED;
+ req_set++;
+ break;
case 'l':
req = REQUEST_LOCK;
req_set++;
@@ -101,7 +110,7 @@ static void process_args(int argc, char *argv[])
}
if (req_set > 1) {
- errmsg("cannot specify more than one lock/unlock option");
+ errmsg("cannot specify more than one lock/unlock/islocked option");
usage(1);
}
@@ -139,6 +148,7 @@ int main(int argc, char *argv[])
struct mtd_info_user mtdInfo;
struct erase_info_user mtdLockInfo;
int count;
+ int ret;
process_args(argc, argv);
@@ -179,13 +189,25 @@ int main(int argc, char *argv[])
case REQUEST_UNLOCK:
request = MEMUNLOCK;
break;
+ case REQUEST_ISLOCKED:
+ request = MEMISLOCKED;
+ break;
default:
errmsg_die("unknown request type: %d", req);
break;
}
- if (ioctl(fd, request, &mtdLockInfo))
+ ret = ioctl(fd, request, &mtdLockInfo);
+ if (ret < 0)
sys_errmsg_die("could not %s device: %s\n",
flash_msg[req], dev);
+ if (req == REQUEST_ISLOCKED) {
+ printf("Device: %s\n", dev);
+ printf("Start: %#0x\n", mtdLockInfo.start);
+ printf("Len: %#0x\n", mtdLockInfo.length);
+ printf("Lock status: %s\n", ret ? "locked" : "unlocked");
+ printf("Return code: %d\n", ret);
+ }
+
return 0;
}