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-rw-r--r--flattree.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/flattree.c b/flattree.c
index 50190b8..9197511 100644
--- a/flattree.c
+++ b/flattree.c
@@ -413,10 +413,13 @@ void dt_to_blob(FILE *f, struct boot_info *bi, int version)
if (padlen > 0)
blob = data_append_zeroes(blob, padlen);
- fwrite(blob.val, blob.len, 1, f);
-
- if (ferror(f))
- die("Error writing device tree blob: %s\n", strerror(errno));
+ if (fwrite(blob.val, blob.len, 1, f) != 1) {
+ if (ferror(f))
+ die("Error writing device tree blob: %s\n",
+ strerror(errno));
+ else
+ die("Short write on device tree blob\n");
+ }
/*
* data_merge() frees the right-hand element so only the blob