util/nvmutil file reads: skip reading if errno!=0

*This condition will probably never be met, but it is theoretically
possible that the code could still fail at this point. Catch all errors,
and exit, ruthlessly.

1 files changed, 2 insertions, 0 deletions

diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index ef0a71e6..6df68f93 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -154,6 +154,8 @@ readFromFile(int *fd, uint8_t *buf, const char *path, int flags, size_t size)
 
 	if (errno == ENOTDIR)
 		errno = 0;
+	else if (errno != 0)
+		return -1;
 
 	return read((*fd), buf, size);
 }