util/nvmutil: add assert for off_t

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index d86b5822..77aa5d9a 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -55,6 +55,13 @@ typedef char static_assert_uint16_is_2[(sizeof(uint16_t) == 2) ? 1 : -1];
 typedef char static_assert_uint32_is_4[(sizeof(uint32_t) == 4) ? 1 : -1];
 
 /*
+ * We set _FILE_OFFSET_BITS 64, but we only handle
+ * files that are 128KB in size at a maximum, so we
+ * realistically only need 32-bit at a minimum.
+ */
+typedef char static_assert_off_t_is_64[(sizeof(off_t) >= 4) ? 1 : -1];
+
+/*
  * The BSD versions that could realistically build
  * nvmutil almost certainly have arc4random (first
  * introduced in 1990s to early 2000s).