diff --git a/gen/const/Fcntl.rb b/gen/const/Fcntl.rb
index dd416390..68a18d21 100644
--- a/gen/const/Fcntl.rb
+++ b/gen/const/Fcntl.rb
@@ -45,6 +45,8 @@ def gen_fcntl_java(options)
       F_WRLCK
       F_ALLOCATECONTIG
       F_ALLOCATEALL
+      F_DUPFD_CLOEXEC
+      FD_CLOEXEC
     ]
     consts.each { |c| cg.const c }
   end
diff --git a/gen/const/OpenFlags.rb b/gen/const/OpenFlags.rb
index 8bafa929..8d1ceeaa 100644
--- a/gen/const/OpenFlags.rb
+++ b/gen/const/OpenFlags.rb
@@ -29,6 +29,8 @@ def gen_openflags_java(options)
       O_NOCTTY
       O_TMPFILE
       O_CLOEXEC
+      O_NOINHERIT
+      O_NDELAY
     ]
     consts.each { |c| cg.const c }
   end
diff --git a/gen/const/Sock.rb b/gen/const/Sock.rb
index ee924b96..0feb10f7 100644
--- a/gen/const/Sock.rb
+++ b/gen/const/Sock.rb
@@ -9,6 +9,7 @@ def gen_sock_java(options)
       SOCK_RDM
       SOCK_SEQPACKET
       SOCK_MAXADDRLEN
+      SOCK_CLOEXEC
     ].each {|c| cg.const c}
   end
 end
diff --git a/src/main/java/jnr/constants/platform/linux/Fcntl.java b/src/main/java/jnr/constants/platform/linux/Fcntl.java
index 2ebb3ad7..ba1a359c 100644
--- a/src/main/java/jnr/constants/platform/linux/Fcntl.java
+++ b/src/main/java/jnr/constants/platform/linux/Fcntl.java
@@ -1,5 +1,5 @@
 // WARNING: This file is autogenerated. DO NOT EDIT!
-// Generated 2018-09-20 16:28:33 +0000
+// Generated 2018-09-21 14:31:00 +0200
 package jnr.constants.platform.linux;
 public enum Fcntl implements jnr.constants.Constant {
 FAPPEND(1024L),
@@ -38,9 +38,11 @@ public enum Fcntl implements jnr.constants.Constant {
 // F_MARKDEPENDENCY not defined
 F_RDLCK(0L),
 F_UNLCK(2L),
-F_WRLCK(1L);
+F_WRLCK(1L),
 // F_ALLOCATECONTIG not defined
 // F_ALLOCATEALL not defined
+F_DUPFD_CLOEXEC(1030L),
+FD_CLOEXEC(1L);
 private final long value;
 private Fcntl(long value) { this.value = value; }
 public static final long MIN_VALUE = 0L;
@@ -68,6 +70,8 @@ public static final java.util.Map<Fcntl, String> generateTable() {
   map.put(F_RDLCK, "F_RDLCK");
   map.put(F_UNLCK, "F_UNLCK");
   map.put(F_WRLCK, "F_WRLCK");
+  map.put(F_DUPFD_CLOEXEC, "F_DUPFD_CLOEXEC");
+  map.put(FD_CLOEXEC, "FD_CLOEXEC");
     return map;
   }
 }
diff --git a/src/main/java/jnr/constants/platform/linux/OpenFlags.java b/src/main/java/jnr/constants/platform/linux/OpenFlags.java
index 47dd622a..a37c6396 100644
--- a/src/main/java/jnr/constants/platform/linux/OpenFlags.java
+++ b/src/main/java/jnr/constants/platform/linux/OpenFlags.java
@@ -1,5 +1,5 @@
 // WARNING: This file is autogenerated. DO NOT EDIT!
-// Generated 2018-09-20 16:28:34 +0000
+// Generated 2018-09-21 14:31:01 +0200
 package jnr.constants.platform.linux;
 public enum OpenFlags implements jnr.constants.Constant {
 O_RDONLY(0L),
@@ -23,7 +23,9 @@ public enum OpenFlags implements jnr.constants.Constant {
 // O_BINARY not defined
 O_NOCTTY(256L),
 O_TMPFILE(4259840L),
-O_CLOEXEC(524288L);
+O_CLOEXEC(524288L),
+// O_NOINHERIT not defined
+O_NDELAY(2048L);
 private final long value;
 private OpenFlags(long value) { this.value = value; }
 public static final long MIN_VALUE = 0L;
@@ -50,6 +52,7 @@ public static final java.util.Map<OpenFlags, String> generateTable() {
   map.put(O_NOCTTY, "O_NOCTTY");
   map.put(O_TMPFILE, "O_TMPFILE");
   map.put(O_CLOEXEC, "O_CLOEXEC");
+  map.put(O_NDELAY, "O_NDELAY");
     return map;
   }
 }
diff --git a/src/main/java/jnr/constants/platform/linux/Sock.java b/src/main/java/jnr/constants/platform/linux/Sock.java
index f9993307..c839b736 100644
--- a/src/main/java/jnr/constants/platform/linux/Sock.java
+++ b/src/main/java/jnr/constants/platform/linux/Sock.java
@@ -1,17 +1,18 @@
 // WARNING: This file is autogenerated. DO NOT EDIT!
-// Generated 2018-09-20 16:28:33 +0000
+// Generated 2018-09-21 14:38:46 +0200
 package jnr.constants.platform.linux;
 public enum Sock implements jnr.constants.Constant {
 SOCK_STREAM(1L),
 SOCK_DGRAM(2L),
 SOCK_RAW(3L),
 SOCK_RDM(4L),
-SOCK_SEQPACKET(5L);
+SOCK_SEQPACKET(5L),
 // SOCK_MAXADDRLEN not defined
+SOCK_CLOEXEC(524288L);
 private final long value;
 private Sock(long value) { this.value = value; }
 public static final long MIN_VALUE = 1L;
-public static final long MAX_VALUE = 5L;
+public static final long MAX_VALUE = 524288L;
 
 static final class StringTable {
   public static final java.util.Map<Sock, String> descriptions = generateTable();
@@ -22,6 +23,7 @@ public static final java.util.Map<Sock, String> generateTable() {
   map.put(SOCK_RAW, "SOCK_RAW");
   map.put(SOCK_RDM, "SOCK_RDM");
   map.put(SOCK_SEQPACKET, "SOCK_SEQPACKET");
+  map.put(SOCK_CLOEXEC, "SOCK_CLOEXEC");
     return map;
   }
 }
diff --git a/src/main/java/jnr/constants/platform/windows/OpenFlags.java b/src/main/java/jnr/constants/platform/windows/OpenFlags.java
index 94fe31cf..f04e157b 100644
--- a/src/main/java/jnr/constants/platform/windows/OpenFlags.java
+++ b/src/main/java/jnr/constants/platform/windows/OpenFlags.java
@@ -1,5 +1,5 @@
 // WARNING: This file is autogenerated. DO NOT EDIT!
-// Generated 2018-09-20 19:03:24 +0200
+// Generated 2018-09-21 14:42:07 +0200
 package jnr.constants.platform.windows;
 public enum OpenFlags implements jnr.constants.Constant {
 O_RDONLY(0L),
@@ -20,10 +20,12 @@ public enum OpenFlags implements jnr.constants.Constant {
 // O_EVTONLY not defined
 // O_DIRECTORY not defined
 // O_SYMLINK not defined
-O_BINARY(32768L);
+O_BINARY(32768L),
 // O_NOCTTY not defined
 // O_TMPFILE not defined
 // O_CLOEXEC not defined
+O_NOINHERIT(128L);
+// O_NDELAY not defined
 private final long value;
 private OpenFlags(long value) { this.value = value; }
 public static final long MIN_VALUE = 0L;
@@ -42,6 +44,7 @@ public static final java.util.Map<OpenFlags, String> generateTable() {
   map.put(O_TRUNC, "O_TRUNC");
   map.put(O_EXCL, "O_EXCL");
   map.put(O_BINARY, "O_BINARY");
+  map.put(O_NOINHERIT, "O_NOINHERIT");
     return map;
   }
 }