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-rw-r--r--sysdeps/generic/sys/socket.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/generic/sys/socket.h b/sysdeps/generic/sys/socket.h
index 759ff3b9b2..6ee3ebe52e 100644
--- a/sysdeps/generic/sys/socket.h
+++ b/sysdeps/generic/sys/socket.h
@@ -321,6 +321,10 @@ extern int accept __P ((int __fd, __SOCKADDR_ARG __addr,
 extern int shutdown __P ((int __fd, int __how));
 
 
+/* Determine whether FILDES if the property identified by the value if
+   FDTYPE.  */
+extern int isfdtype __P ((int __fildes, int __fdtype));
+
 __END_DECLS
 
 #endif /* sys/socket.h */