1 files changed, 30 insertions, 0 deletions
diff --git a/groff/pipeline.h b/groff/pipeline.h
new file mode 100644
index 000000000..032b0bba6
--- /dev/null
+++ b/groff/pipeline.h
@@ -0,0 +1,30 @@
+/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+groff 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License along
+with groff; see the file COPYING.  If not, write to the Free Software
+Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifdef __cplusplus
+extern "C" {
+  int run_pipeline(int, char ***);
+}
+#endif
+
+/* run_pipeline can handle at most this many commands */
+#define MAX_COMMANDS 10
+
+/* Children exit with this status if execvp fails. */
+#define EXEC_FAILED_EXIT_STATUS 0xff