diff --git a/src/common/strbuf.c b/src/common/strbuf.c
index 0d3a1dd..0a64884 100644
--- a/src/common/strbuf.c
+++ b/src/common/strbuf.c
@@ -72,6 +72,16 @@ void strbuf_free(strbuf_t *s) {
     strbuf_init(s);
 }
 
+void strbuf_attach(strbuf_t *s, void *buf, size_t len, size_t alloc_size) {
+
+    strbuf_free(s);
+    s->buf = buf;
+    s->len = len;
+    s->alloc_size = alloc_size;
+    strbuf_expand(s, 0);
+    s->buf[s->len] = '\0';
+}
+
 void strbuf_append(strbuf_t *s, const void *ptr, size_t len) {
 
     strbuf_expand(s, len);
diff --git a/src/common/strbuf.h b/src/common/strbuf.h
index d92f0e9..d6e191b 100644
--- a/src/common/strbuf.h
+++ b/src/common/strbuf.h
@@ -33,6 +33,8 @@ char* strbuf_release(strbuf_t *s);
 
 void strbuf_free(strbuf_t *s);
 
+void strbuf_attach(strbuf_t *s, void *str, size_t len, size_t alloc_size);
+
 void strbuf_append(strbuf_t *s, const void *ptr, size_t len);
 
 void strbuf_append_str(strbuf_t *s, const char *str);