anchor.diff:    ((:eaddrnotavail "EADDRNOTAVAIL"))
     ((:edestaddrreq "EDESTADDRREQ"))
     ((:efault "EFAULT"))
  +  ((:emsgsize "EMSGSIZE"))
     ((:einval "EINVAL"))
     ((:enotsock "ENOTSOCK"))
     ((:eopnotsupp "EOPNOTSUPP"))
  
positive.code:   ((:eloop "ELOOP"))
    ((:enametoolong "ENAMETOOLONG"))
    ((:enoent "ENOENT"))
    ((:enotdir "ENOTDIR")))
  
  (include "fcntl.h")
  
  
negative.code:   ((:econnrefused "ECONNREFUSED"))
    ((:ehostunreach "EHOSTUNREACH"))
    ((:einprogress "EINPROGRESS"))
    ((:ehostdown "EHOSTDOWN"))
    ((:enetdown "ENETDOWN"))
    ((:enetunreach "ENETUNREACH"))
    ((:etimedout "ETIMEDOUT"))
  