# <!-- rdoc-file=error.c -->
# When an operating system encounters an error, it typically reports the error
# as an integer error code:
#
#     $ ls nosuch.txt
#     ls: cannot access 'nosuch.txt': No such file or directory
#     $ echo $? # Code for last error.
#     2
#
# When the Ruby interpreter interacts with the operating system and receives
# such an error code (e.g., `2`), it maps the code to a particular Ruby
# exception class (e.g., `Errno::ENOENT`):
#
#     File.open('nosuch.txt')
#     # => No such file or directory @ rb_sysopen - nosuch.txt (Errno::ENOENT)
#
# Each such class is:
#
# *   A nested class in this module, `Errno`.
# *   A subclass of class SystemCallError.
# *   Associated with an error code.
#
# Thus:
#
#     Errno::ENOENT.superclass # => SystemCallError
#     Errno::ENOENT::Errno     # => 2
#
# The names of nested classes are returned by method `Errno.constants`:
#
#     Errno.constants.size         # => 158
#     Errno.constants.sort.take(5) # => [:E2BIG, :EACCES, :EADDRINUSE, :EADDRNOTAVAIL, :EADV]
#
# As seen above, the error code associated with each class is available as the
# value of a constant; the value for a particular class may vary among operating
# systems. If the class is not needed for the particular operating system, the
# value is zero:
#
#     Errno::ENOENT::Errno      # => 2
#     Errno::ENOTCAPABLE::Errno # => 0
#
module Errno
  class NOERROR < SystemCallError
    Errno: 0
  end

  class E2BIG < SystemCallError
    Errno: Integer
  end

  class EACCES < SystemCallError
    Errno: Integer
  end

  class EADDRINUSE < SystemCallError
    Errno: Integer
  end

  class EADDRNOTAVAIL < SystemCallError
    Errno: Integer
  end

  class EADV < SystemCallError
    Errno: Integer
  end

  class EAFNOSUPPORT < SystemCallError
    Errno: Integer
  end

  class EAGAIN < SystemCallError
    Errno: Integer
  end

  class EALREADY < SystemCallError
    Errno: Integer
  end

  class EAUTH < SystemCallError
    Errno: Integer
  end

  class EBADARCH < SystemCallError
    Errno: Integer
  end

  class EBADE < SystemCallError
    Errno: Integer
  end

  class EBADEXEC < SystemCallError
    Errno: Integer
  end

  class EBADF < SystemCallError
    Errno: Integer
  end

  class EBADFD < SystemCallError
    Errno: Integer
  end

  class EBADMACHO < SystemCallError
    Errno: Integer
  end

  class EBADMSG < SystemCallError
    Errno: Integer
  end

  class EBADR < SystemCallError
    Errno: Integer
  end

  class EBADRPC < SystemCallError
    Errno: Integer
  end

  class EBADRQC < SystemCallError
    Errno: Integer
  end

  class EBADSLT < SystemCallError
    Errno: Integer
  end

  class EBFONT < SystemCallError
    Errno: Integer
  end

  class EBUSY < SystemCallError
    Errno: Integer
  end

  class ECANCELED < SystemCallError
    Errno: Integer
  end

  class ECAPMODE < SystemCallError
    Errno: Integer
  end

  class ECHILD < SystemCallError
    Errno: Integer
  end

  class ECHRNG < SystemCallError
    Errno: Integer
  end

  class ECOMM < SystemCallError
    Errno: Integer
  end

  class ECONNABORTED < SystemCallError
    Errno: Integer
  end

  class ECONNREFUSED < SystemCallError
    Errno: Integer
  end

  class ECONNRESET < SystemCallError
    Errno: Integer
  end

  class EDEADLK < SystemCallError
    Errno: Integer
  end

  class EDEADLOCK < SystemCallError
    Errno: Integer
  end

  class EDESTADDRREQ < SystemCallError
    Errno: Integer
  end

  class EDEVERR < SystemCallError
    Errno: Integer
  end

  class EDOM < SystemCallError
    Errno: Integer
  end

  class EDOOFUS < SystemCallError
    Errno: Integer
  end

  class EDOTDOT < SystemCallError
    Errno: Integer
  end

  class EDQUOT < SystemCallError
    Errno: Integer
  end

  class EEXIST < SystemCallError
    Errno: Integer
  end

  class EFAULT < SystemCallError
    Errno: Integer
  end

  class EFBIG < SystemCallError
    Errno: Integer
  end

  class EFTYPE < SystemCallError
    Errno: Integer
  end

  class EHOSTDOWN < SystemCallError
    Errno: Integer
  end

  class EHOSTUNREACH < SystemCallError
    Errno: Integer
  end

  class EHWPOISON < SystemCallError
    Errno: Integer
  end

  class EIDRM < SystemCallError
    Errno: Integer
  end

  class EILSEQ < SystemCallError
    Errno: Integer
  end

  class EINPROGRESS < SystemCallError
    Errno: Integer
  end

  class EINTR < SystemCallError
    Errno: Integer
  end

  class EINVAL < SystemCallError
    Errno: Integer
  end

  class EIO < SystemCallError
    Errno: Integer
  end

  class EIPSEC < SystemCallError
    Errno: Integer
  end

  class EISCONN < SystemCallError
    Errno: Integer
  end

  class EISDIR < SystemCallError
    Errno: Integer
  end

  class EISNAM < SystemCallError
    Errno: Integer
  end

  class EKEYEXPIRED < SystemCallError
    Errno: Integer
  end

  class EKEYREJECTED < SystemCallError
    Errno: Integer
  end

  class EKEYREVOKED < SystemCallError
    Errno: Integer
  end

  class EL2HLT < SystemCallError
    Errno: Integer
  end

  class EL2NSYNC < SystemCallError
    Errno: Integer
  end

  class EL3HLT < SystemCallError
    Errno: Integer
  end

  class EL3RST < SystemCallError
    Errno: Integer
  end

  class ELAST < SystemCallError
    Errno: Integer
  end

  class ELIBACC < SystemCallError
    Errno: Integer
  end

  class ELIBBAD < SystemCallError
    Errno: Integer
  end

  class ELIBEXEC < SystemCallError
    Errno: Integer
  end

  class ELIBMAX < SystemCallError
    Errno: Integer
  end

  class ELIBSCN < SystemCallError
    Errno: Integer
  end

  class ELNRNG < SystemCallError
    Errno: Integer
  end

  class ELOOP < SystemCallError
    Errno: Integer
  end

  class EMEDIUMTYPE < SystemCallError
    Errno: Integer
  end

  class EMFILE < SystemCallError
    Errno: Integer
  end

  class EMLINK < SystemCallError
    Errno: Integer
  end

  class EMSGSIZE < SystemCallError
    Errno: Integer
  end

  class EMULTIHOP < SystemCallError
    Errno: Integer
  end

  class ENAMETOOLONG < SystemCallError
    Errno: Integer
  end

  class ENAVAIL < SystemCallError
    Errno: Integer
  end

  class ENEEDAUTH < SystemCallError
    Errno: Integer
  end

  class ENETDOWN < SystemCallError
    Errno: Integer
  end

  class ENETRESET < SystemCallError
    Errno: Integer
  end

  class ENETUNREACH < SystemCallError
    Errno: Integer
  end

  class ENFILE < SystemCallError
    Errno: Integer
  end

  class ENOANO < SystemCallError
    Errno: Integer
  end

  class ENOATTR < SystemCallError
    Errno: Integer
  end

  class ENOBUFS < SystemCallError
    Errno: Integer
  end

  class ENOCSI < SystemCallError
    Errno: Integer
  end

  class ENODATA < SystemCallError
    Errno: Integer
  end

  class ENODEV < SystemCallError
    Errno: Integer
  end

  class ENOENT < SystemCallError
    Errno: Integer
  end

  class ENOEXEC < SystemCallError
    Errno: Integer
  end

  class ENOKEY < SystemCallError
    Errno: Integer
  end

  class ENOLCK < SystemCallError
    Errno: Integer
  end

  class ENOLINK < SystemCallError
    Errno: Integer
  end

  class ENOMEDIUM < SystemCallError
    Errno: Integer
  end

  class ENOMEM < SystemCallError
    Errno: Integer
  end

  class ENOMSG < SystemCallError
    Errno: Integer
  end

  class ENONET < SystemCallError
    Errno: Integer
  end

  class ENOPKG < SystemCallError
    Errno: Integer
  end

  class ENOPOLICY < SystemCallError
    Errno: Integer
  end

  class ENOPROTOOPT < SystemCallError
    Errno: Integer
  end

  class ENOSPC < SystemCallError
    Errno: Integer
  end

  class ENOSR < SystemCallError
    Errno: Integer
  end

  class ENOSTR < SystemCallError
    Errno: Integer
  end

  class ENOSYS < SystemCallError
    Errno: Integer
  end

  class ENOTBLK < SystemCallError
    Errno: Integer
  end

  class ENOTCAPABLE < SystemCallError
    Errno: Integer
  end

  class ENOTCONN < SystemCallError
    Errno: Integer
  end

  class ENOTDIR < SystemCallError
    Errno: Integer
  end

  class ENOTEMPTY < SystemCallError
    Errno: Integer
  end

  class ENOTNAM < SystemCallError
    Errno: Integer
  end

  class ENOTRECOVERABLE < SystemCallError
    Errno: Integer
  end

  class ENOTSOCK < SystemCallError
    Errno: Integer
  end

  class ENOTSUP < SystemCallError
    Errno: Integer
  end

  class ENOTTY < SystemCallError
    Errno: Integer
  end

  class ENOTUNIQ < SystemCallError
    Errno: Integer
  end

  class ENXIO < SystemCallError
    Errno: Integer
  end

  class EOPNOTSUPP < SystemCallError
    Errno: Integer
  end

  class EOVERFLOW < SystemCallError
    Errno: Integer
  end

  class EOWNERDEAD < SystemCallError
    Errno: Integer
  end

  class EPERM < SystemCallError
    Errno: Integer
  end

  class EPFNOSUPPORT < SystemCallError
    Errno: Integer
  end

  class EPIPE < SystemCallError
    Errno: Integer
  end

  class EPROCLIM < SystemCallError
    Errno: Integer
  end

  class EPROCUNAVAIL < SystemCallError
    Errno: Integer
  end

  class EPROGMISMATCH < SystemCallError
    Errno: Integer
  end

  class EPROGUNAVAIL < SystemCallError
    Errno: Integer
  end

  class EPROTO < SystemCallError
    Errno: Integer
  end

  class EPROTONOSUPPORT < SystemCallError
    Errno: Integer
  end

  class EPROTOTYPE < SystemCallError
    Errno: Integer
  end

  class EPWROFF < SystemCallError
    Errno: Integer
  end

  class EQFULL < SystemCallError
    Errno: Integer
  end

  class ERANGE < SystemCallError
    Errno: Integer
  end

  class EREMCHG < SystemCallError
    Errno: Integer
  end

  class EREMOTE < SystemCallError
    Errno: Integer
  end

  class EREMOTEIO < SystemCallError
    Errno: Integer
  end

  class ERESTART < SystemCallError
    Errno: Integer
  end

  class ERFKILL < SystemCallError
    Errno: Integer
  end

  class EROFS < SystemCallError
    Errno: Integer
  end

  class ERPCMISMATCH < SystemCallError
    Errno: Integer
  end

  class ESHLIBVERS < SystemCallError
    Errno: Integer
  end

  class ESHUTDOWN < SystemCallError
    Errno: Integer
  end

  class ESOCKTNOSUPPORT < SystemCallError
    Errno: Integer
  end

  class ESPIPE < SystemCallError
    Errno: Integer
  end

  class ESRCH < SystemCallError
    Errno: Integer
  end

  class ESRMNT < SystemCallError
    Errno: Integer
  end

  class ESTALE < SystemCallError
    Errno: Integer
  end

  class ESTRPIPE < SystemCallError
    Errno: Integer
  end

  class ETIME < SystemCallError
    Errno: Integer
  end

  class ETIMEDOUT < SystemCallError
    Errno: Integer
  end

  class ETOOMANYREFS < SystemCallError
    Errno: Integer
  end

  class ETXTBSY < SystemCallError
    Errno: Integer
  end

  class EUCLEAN < SystemCallError
    Errno: Integer
  end

  class EUNATCH < SystemCallError
    Errno: Integer
  end

  class EUSERS < SystemCallError
    Errno: Integer
  end

  class EWOULDBLOCK < SystemCallError
    Errno: Integer
  end

  class EXDEV < SystemCallError
    Errno: Integer
  end

  class EXFULL < SystemCallError
    Errno: Integer
  end
end