-#define SYS_CLOSE 66 // Close a file
-#define SYS_READ 67 // Read from an open file
-#define SYS_WRITE 68 // Write to an open file
-#define SYS_IOCTL 69 // Perform an IOCtl Call
-#define SYS_SEEK 70 // Seek to a new position in the file
-#define SYS_READDIR 71 // Read from an open directory
-#define SYS_OPENCHILD 72 // Open a child entry in a directory
-#define SYS_GETACL 73 // Get an ACL Value
-#define SYS_SETACL 74 // Set an ACL Value
-#define SYS_FINFO 75 // Get file information
-#define SYS_MKDIR 76 // Create a new directory
-#define SYS_LINK 77 // Create a new link to a file
-#define SYS_SYMLINK 78 // Create a symbolic link
-#define SYS_UNLINK 79 // Delete a file
-#define SYS_TELL 80 // Return the current file position
-#define SYS_CHDIR 81 // Change current directory
-#define SYS_GETCWD 82 // Get current directory
-#define SYS_MOUNT 83 // Mount a filesystem
-#define SYS_SELECT 84 // Wait for file handles
+#define SYS_OPENCHILD 66 // Open a child entry in a directory
+#define SYS_OPENPIPE 67 // Open a FIFO pipe pair
+#define SYS_CLOSE 68 // Close a file
+#define SYS_COPYFD 69 // Create a copy of a file handle
+#define SYS_FDCTL 70 // Modify properties of a file descriptor
+#define SYS_READ 71 // Read from an open file
+#define SYS_WRITE 72 // Write to an open file
+#define SYS_IOCTL 73 // Perform an IOCtl Call
+#define SYS_SEEK 74 // Seek to a new position in the file
+#define SYS_READDIR 75 // Read from an open directory
+#define SYS_GETACL 76 // Get an ACL Value
+#define SYS_SETACL 77 // Set an ACL Value
+#define SYS_FINFO 78 // Get file information
+#define SYS_MKDIR 79 // Create a new directory
+#define SYS_LINK 80 // Create a new link to a file
+#define SYS_SYMLINK 81 // Create a symbolic link
+#define SYS_UNLINK 82 // Delete a file
+#define SYS_TELL 83 // Return the current file position
+#define SYS_CHDIR 84 // Change current directory
+#define SYS_GETCWD 85 // Get current directory
+#define SYS_MOUNT 86 // Mount a filesystem
+#define SYS_SELECT 87 // Wait for file handles