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1 | .\" Copyright (c) 1983 Regents of the University of California. |
2 | .\" All rights reserved. The Berkeley software License Agreement | |
3 | .\" specifies the terms and conditions for redistribution. | |
4 | .\" | |
bce6b55f | 5 | .\" @(#)socketpair.2 6.1 (Berkeley) %G% |
2a693a1d | 6 | .\" |
bce6b55f | 7 | .TH SOCKETPAIR 2 "" |
2a693a1d KM |
8 | .UC 5 |
9 | .SH NAME | |
10 | socketpair \- create a pair of connected sockets | |
11 | .SH SYNOPSIS | |
12 | .nf | |
13 | .ft B | |
14 | #include <sys/types.h> | |
15 | #include <sys/socket.h> | |
16 | .PP | |
17 | .ft B | |
18 | socketpair(d, type, protocol, sv) | |
19 | int d, type, protocol; | |
20 | int sv[2]; | |
21 | .fi | |
22 | .SH DESCRIPTION | |
23 | The | |
24 | .I socketpair | |
25 | call creates an unnamed pair of connected sockets in | |
26 | the specified domain | |
27 | .IR d , | |
28 | of the specified | |
29 | .IR type , | |
30 | and using the optionally specified | |
31 | .IR protocol . | |
32 | The descriptors used in referencing the new sockets | |
33 | are returned in | |
34 | .IR sv [0] | |
35 | and | |
36 | .IR sv [1]. | |
37 | The two sockets are indistinguishable. | |
38 | .SH DIAGNOSTICS | |
39 | A 0 is returned if the call succeeds, \-1 if it fails. | |
40 | .SH ERRORS | |
41 | The call succeeds unless: | |
42 | .TP 20 | |
43 | [EMFILE] | |
44 | Too many descriptors are in use by this process. | |
45 | .TP 20 | |
46 | [EAFNOSUPPORT] | |
47 | The specified address family is not supported on this machine. | |
48 | .TP 20 | |
49 | [EPROTONOSUPPORT] | |
50 | The specified protocol is not supported on this machine. | |
51 | .TP 20 | |
52 | [EOPNOSUPPORT] | |
53 | The specified protocol does not support creation of socket pairs. | |
54 | .TP 20 | |
55 | [EFAULT] | |
56 | The address \fIsv\fP does not specify a valid part of the | |
57 | process address space. | |
58 | .SH "SEE ALSO" | |
59 | read(2), write(2), pipe(2) | |
60 | .SH BUGS | |
61 | This call is currently implemented only for the UNIX domain. |