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1.1 ! root 1: .TH SOCKETPAIR 2 "27 July 1983" ! 2: .UC 4 ! 3: .SH NAME ! 4: socketpair \- create a pair of connected sockets ! 5: .SH SYNOPSIS ! 6: .nf ! 7: .ft B ! 8: #include <sys/types.h> ! 9: #include <sys/socket.h> ! 10: .PP ! 11: .ft B ! 12: socketpair(d, type, protocol, sv) ! 13: int d, type, protocol; ! 14: int sv[2]; ! 15: .fi ! 16: .SH DESCRIPTION ! 17: The ! 18: .I socketpair ! 19: call creates an unnamed pair of connected sockets in ! 20: the specified domain ! 21: .IR d , ! 22: of the specified ! 23: .IR type , ! 24: and using the optionally specified ! 25: .IR protocol . ! 26: The descriptors used in referencing the new sockets ! 27: are returned in ! 28: .IR sv [0] ! 29: and ! 30: .IR sv [1]. ! 31: The two sockets are indistinguishable. ! 32: .SH DIAGNOSTICS ! 33: A 0 is returned if the call succeeds, \-1 if it fails. ! 34: .SH ERRORS ! 35: The call succeeds unless: ! 36: .TP 20 ! 37: [EMFILE] ! 38: Too many descriptors are in use by this process. ! 39: .TP 20 ! 40: [EAFNOSUPPORT] ! 41: The specified address family is not supported on this machine. ! 42: .TP 20 ! 43: [EPROTONOSUPPORT] ! 44: The specified protocol is not supported on this machine. ! 45: .TP 20 ! 46: [EOPNOSUPPORT] ! 47: The specified protocol does not support creation of socket pairs. ! 48: .TP 20 ! 49: [EFAULT] ! 50: The address \fIsv\fP does not specify a valid part of the ! 51: process address space. ! 52: .SH "SEE ALSO" ! 53: read(2), write(2), pipe(2) ! 54: .SH BUGS ! 55: This call is currently implemented only for the UNIX domain.
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