unikernel/duniverse/dune_/test/blackbox-tests/test-cases/github8041.t

@@ -0,0 +1,33 @@
+  $ cat > dune-project << EOF
+  > (lang dune 2.4)
+  > (package
+  >  (name p))
+  > EOF
+
+  $ cat > dune << EOF
+  > (rule (copy data.txt data2.txt))
+  > 
+  > (install
+  >  (files data.txt data2.txt data3.txt)
+  >  (section share))
+  > EOF
+
+  $ echo contents > data.txt
+  $ head -c 100000 /dev/zero > data3.txt
+
+If sendfile fails, we should fallback to the portable implementation.
+
+  $ strace -e inject=sendfile:error=EINVAL -o /dev/null dune build @install
+
+#8210: data2.txt is copied from readonly-file data.txt (#3092), so it needs to
+be adequately unlinked before starting the fallback.
+
+#8284: the buffer needs to be flushed, or there will be incomplete data in
+larger files.
+
+  $ if cmp -s data3.txt _build/default/data3.txt ; then
+  >   echo "File copied correctly"
+  > else
+  >   echo "File copied incorrectly"
+  > fi
+  File copied correctly