fastd_buffer_alloc: fix output of error message if posix_memalign fails

1 files changed, 3 insertions, 2 deletions

diff --git a/src/fastd.h b/src/fastd.h
index 4e17cb5..5354871 100644
--- a/src/fastd.h
+++ b/src/fastd.h
@@ -437,8 +437,9 @@ static inline size_t alignto(size_t l, size_t a) {
 static inline fastd_buffer_t fastd_buffer_alloc(const fastd_context_t *ctx, size_t len, size_t head_space, size_t tail_space) {
 	size_t base_len = head_space+len+tail_space;
 	void *ptr;
-	if (posix_memalign(&ptr, 16, base_len))
-		exit_errno(ctx, "posix_memalign");
+	int err = posix_memalign(&ptr, 16, base_len);
+	if (err)
+		exit_error(ctx, "posix_memalign: %s", strerror(err));
 
 	return (fastd_buffer_t){ .base = ptr, .base_len = base_len, .data = ptr+head_space, .len = len };
 }