X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/a4243347741f0f7079858e03bca8fc32990f525c..1f868ca317a161c7b754dc2d80b3be49eddafb23:/lib/sink.h

diff --git a/lib/sink.h b/lib/sink.h
index 15462ae..aab645b 100644
--- a/lib/sink.h
+++ b/lib/sink.h
@@ -24,6 +24,8 @@
 #ifndef SINK_H
 #define SINK_H
 
+#include <stdarg.h>
+
 struct dynstr;
 
 /** @brief Sink type
@@ -51,7 +53,10 @@ struct sink *sink_dynstr(struct dynstr *output);
 /* return a sink which appends to @output@. */
 
 struct sink *sink_discard(void);
-/* reutrn a sink which junks everything */
+/* return a sink which junks everything */
+
+struct sink *sink_error(void);
+/* return a sink which fails all writes */
 
 int sink_vprintf(struct sink *s, const char *fmt, va_list ap);
 int sink_printf(struct sink *s, const char *fmt, ...)