diff --git a/include/log.h b/include/log.h
index dc5afc2..531ff30 100644
--- a/include/log.h
+++ b/include/log.h
@@ -15,4 +15,14 @@ void liftoff_log(enum liftoff_log_importance verbosity,
 		 const char *format, ...) _LIFTOFF_ATTRIB_PRINTF(2, 3);
 void liftoff_log_errno(enum liftoff_log_importance verbosity, const char *msg);
 
+struct liftoff_log_buffer {
+	char *data;
+	size_t len, cap;
+};
+
+void liftoff_log_buffer_append(struct liftoff_log_buffer *buf,
+							   const char *fmt, ...);
+void liftoff_log_buffer_flush(struct liftoff_log_buffer *buf,
+							  enum liftoff_log_importance verbosity);
+
 #endif
diff --git a/log.c b/log.c
index 957517f..59356d2 100644
--- a/log.c
+++ b/log.c
@@ -1,5 +1,6 @@
 #include <errno.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "log.h"
 
@@ -45,3 +46,68 @@ void liftoff_log_errno(enum liftoff_log_importance verbosity, const char *msg)
 {
 	liftoff_log(verbosity, "%s: %s", msg, strerror(errno));
 }
+
+void liftoff_log_buffer_append(struct liftoff_log_buffer *buf,
+							   const char *fmt, ...)
+{
+	if (!buf) {
+		return;
+	}
+
+	va_list args;
+	va_start(args, fmt);
+
+	if (buf->data == NULL) {
+		buf->data = malloc(4096);
+		if (buf->data == NULL) {
+			liftoff_log_errno(LIFTOFF_ERROR, "malloc");
+			goto cleanup_out;
+		}
+		buf->len = 4096 / sizeof(char);
+	}
+
+	do {
+		size_t max_len = buf->len - buf->cap;
+		int ret;
+
+		ret = vsnprintf(buf->data + buf->cap, max_len, fmt, args);
+		if (ret < 0) {
+			goto cleanup_out;
+		}
+
+		if (ret - (int)max_len > 0) {
+			buf->cap = buf->len;
+			buf->len *= 2;
+
+			if (realloc(buf->data, buf->len) == NULL) {
+				liftoff_log_errno(LIFTOFF_ERROR, "realloc");
+				goto cleanup_out;
+			}
+		} else {
+			buf->cap += ret;
+			goto final_out;
+		}
+	} while (1);
+
+cleanup_out:
+	free(buf->data);
+	buf->data = NULL;
+	buf->cap = 0;
+	buf->len = 0;
+
+final_out:
+	va_end(args);
+}
+
+void liftoff_log_buffer_flush(struct liftoff_log_buffer *buf,
+							  enum liftoff_log_importance verbosity)
+{
+	if (!buf || !buf->data || buf->len == 0) {
+		return;
+	}
+	liftoff_log(verbosity, "%s\n", buf->data);
+	free(buf->data);
+	buf->data = NULL;
+	buf->cap = 0;
+	buf->len = 0;
+}