Index for Section 2

Alphabetical listing for S

Bottom of page

socketpair(2)
NAME
  socketpair - Create a pair of connected sockets

SYNOPSIS
  #include <sys/socket.h>

  int socketpair(
	  int domain,
	  int type,
	  int protocol,
	  int socket_vector[2] );

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  socketpair(): XNS4.0, XNS5.0

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  domain
      Specifies the communications domain in which the sockets are created.
      This function does not create sockets in the Internet domain.

  type
      Specifies the communications method that sockets use, for example
      SOCK_DGRAM or SOCK_STREAM.

  protocol
      Specifies an optional identifier used to define the communications
      protocols used in the transport layer interface.

  socket_vector
      Specifies a two-integer array used to hold the file descriptors of the
      socket pair created with the call to this function.

DESCRIPTION
  The socketpair() function creates an unnamed pair of connected sockets in a
  specified domain, of a specified type, under the protocol optionally
  specified by the protocol parameter. The two sockets are identical. The
  file descriptors used in referencing the created sockets are returned to
  socket_vector[0] and socket_vector[1]. The sys/socket.h include file
  contains definitions for socket domains, types, and protocols.

  Not all protocol families support the socketpair() function.

RETURN VALUES
  Upon successful completion, this function returns a value of 0 (zero).
  Otherwise, -1 is returned and errno is specified to indicate the error.

ERRORS
  If the socketpair() function fails, errno may be set to one of the
  following values:

  [EACCES]
      The process have not have appropriate privileges.

  [EAFNOSUPPORT]
      The addresses in the specified address family cannot be used to create
      this socket pair.

  [EFAULT]
      [Tru64 UNIX]  The socket_vector array is not located in a writable part
      of user address space.

  [EMFILE]
      The current process has too many open file descriptors.

  [ENFILE]
      No more file descriptors are available for the system.

  [ENOBUFS]
      Insufficient resources were available in the system to complete the
      call.

  [ENOMEM]
      The system was unable to allocate kernel memory to increase the process
      descriptor table.

  [ENOSR]
      The available STREAMS resources were insufficient for the operation to
      complete.

  [EOPNOTSUPP]
      The specified protocol does not permit creation of socket pairs.

  [EPROTONOSUPPORT]
      The specified protocol cannot be used in this system.

  [EPROTOTYPE]
      The socket type is not supported by the protocol.

SEE ALSO
  Functions: socket(2)

  Standards: standards(5)

  Network Programmer's Guide

Index for Section 2

Alphabetical listing for S

Top of page