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-rw-r--r--bootloader.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/bootloader.cpp b/bootloader.cpp
index fbb31e060..033591274 100644
--- a/bootloader.cpp
+++ b/bootloader.cpp
@@ -275,7 +275,7 @@ static int get_bootloader_message_block(struct bootloader_message *out,
static int set_bootloader_message_block(const struct bootloader_message *in,
const Volume* v) {
wait_for_device(v->blk_device);
- FILE* f = fopen(v->blk_device, "wb");
+ FILE* f = fopen(v->blk_device, "rb+");
if (f == NULL) {
LOGE("Can't open %s\n(%s)\n", v->blk_device, strerror(errno));
return -1;
@@ -317,7 +317,7 @@ int get_bootloader_message_block_name(struct bootloader_message *out) {
int set_bootloader_message_block_name(const struct bootloader_message *in,
const char* block_name) {
wait_for_device(block_name);
- FILE* f = fopen(block_name, "wb");
+ FILE* f = fopen(block_name, "rb+");
if (f == NULL) {
printf("Can't open %s\n(%s)\n", block_name, strerror(errno));
return -1;