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-rw-r--r--include/ouroboros/fccntl.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/ouroboros/fccntl.h b/include/ouroboros/fccntl.h
index d938439f..3bd09e65 100644
--- a/include/ouroboros/fccntl.h
+++ b/include/ouroboros/fccntl.h
@@ -33,6 +33,8 @@
#define FLOWFRDWR 00000002 /* Read-write flow */
#define FLOWFACCMODE 00000003 /* Access mask */
+#define FLOWFDOWN 00000004 /* Flow is down */
+
#define FLOWFNONBLOCK 00004000 /* Non-blocking flow */
#define FLOWFDEFAULT 00000002 /* Default, blocking, rw */