1 files changed, 23 insertions, 0 deletions
diff --git a/lib/isapipe.h b/lib/isapipe.h
new file mode 100644
index 0000000..b400642
--- /dev/null
+++ b/lib/isapipe.h
@@ -0,0 +1,23 @@
+/* Test whether a file descriptor is a pipe.
+
+   Copyright (C) 2006-2022 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation, either version 3 of the
+   License, or (at your option) any later version.
+
+   This file is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Whether pipes are FIFOs; -1 if not known.  */
+#ifndef HAVE_FIFO_PIPES
+# define HAVE_FIFO_PIPES (-1)
+#endif
+
+int isapipe (int fd);