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mothra: show errorbody contents (404 pages)

--- a/sys/src/cmd/mothra/url.c

+++ b/sys/src/cmd/mothra/url.c

@@ -205,6 +205,10 @@

 	n = strlen(buf);

 	snprint(buf+n, sizeof(buf)-n, "/body");

 	body = open(buf, OREAD);

+	if(body < 0){

+		snprint(buf+n, sizeof(buf)-n, "/errorbody");

+		body = open(buf, OREAD);

+	}

 	close(fd);

 	fd = body;

 	if(fd < 0)

-- 

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