diff options
Diffstat (limited to 'bootloader_message/bootloader_message.cpp')
-rw-r--r-- | bootloader_message/bootloader_message.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/bootloader_message/bootloader_message.cpp b/bootloader_message/bootloader_message.cpp index 4d1ce5bb4..449f40e11 100644 --- a/bootloader_message/bootloader_message.cpp +++ b/bootloader_message/bootloader_message.cpp @@ -159,7 +159,10 @@ static bool write_misc_partition(const void* p, size_t size, size_t offset, std: *err = "no misc device set"; return false; } - int fd = (open(misc_blk_device.c_str(), O_WRONLY | O_SYNC)); + int open_flags = O_WRONLY | O_SYNC; + if (offset > 0) + open_flags = O_RDWR | O_APPEND | O_SYNC; + int fd = (open(misc_blk_device.c_str(), open_flags)); if (fd == -1) { *err = "failed to open " + misc_blk_device + ": "; *err += strerror(errno); |