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>SOCKETPAIR(2)                 System Calls Manual                SOCKETPAIR(2)
 
NAME
     socketpair - create a pair of connected sockets
 
SYNOPSIS
     #include &lt;sys/types.h&#62;
     #include &lt;sys/socket.h&#62;
 
     int
     socketpair(int d, int type, int protocol, int *sv);
 
DESCRIPTION
     The socketpair() call creates an unnamed pair of connected sockets in the
     specified domain d, of the specified type, and using the optionally spec-
     ified protocol.  The descriptors used in referencing the new sockets are
     returned in sv[0] and sv[1].  The two sockets are indistinguishable.
 
RETURN VALUES
     A 0 is returned if the call succeeds, -1 if it fails.
 
ERRORS
     The call succeeds unless:
 
     [EMFILE]           Too many descriptors are in use by this process.
 
     [EAFNOSUPPORT]     The specified address family is not supported on this
                        machine.
 
     [EPROTONOSUPPORT]  The specified protocol is not supported on this
                        machine.
 
     [EOPNOTSUPP]       The specified protocol does not support creation of
                        socket pairs.
 
     [EFAULT]           The address sv does not specify a valid part of the
                        process address space.
 
     [ENFILE]           The system file table is full.
 
SEE ALSO
     pipe(2), read(2), write(2)
 
BUGS
     This call is currently implemented only for the LOCAL domain.  Many oper-
     ating systems only accept a protocol of PF_UNSPEC, so that should be used
     instead of PF_LOCAL for maximal portability.
 
STANDARDS
     The socketpair() function conforms to X/Open Portability Guide Issue 4.2
     (``XPG4.2'').
 
HISTORY
     The socketpair() function call appeared in 4.2BSD.
 
BSD                              June 4, 1993                              BSD
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3			`<!-- and conditions set forth in the Open Publication License, v1.0 -->`
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65			`>Chapter 38. TCP/IP Library Reference</TD`
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85			`NAME="NET-COMMON-TCPIP-MANPAGES-SOCKETPAIR">socketpair</H1`
86			`><TABLE`
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94			`>SOCKETPAIR(2) System Calls Manual SOCKETPAIR(2)`
95
96			`NAME`
97			`socketpair - create a pair of connected sockets`
98
99			`SYNOPSIS`
100			`#include <sys/types.h>`
101			`#include <sys/socket.h>`
102
103			`int`
104			`socketpair(int d, int type, int protocol, int *sv);`
105
106			`DESCRIPTION`
107			`The socketpair() call creates an unnamed pair of connected sockets in the`
108			`specified domain d, of the specified type, and using the optionally spec-`
109			`ified protocol. The descriptors used in referencing the new sockets are`
110			`returned in sv[0] and sv[1]. The two sockets are indistinguishable.`
111
112			`RETURN VALUES`
113			`A 0 is returned if the call succeeds, -1 if it fails.`
114
115			`ERRORS`
116			`The call succeeds unless:`
117
118			`[EMFILE] Too many descriptors are in use by this process.`
119
120			`[EAFNOSUPPORT] The specified address family is not supported on this`
121			`machine.`
122
123			`[EPROTONOSUPPORT] The specified protocol is not supported on this`
124			`machine.`
125
126			`[EOPNOTSUPP] The specified protocol does not support creation of`
127			`socket pairs.`
128
129			`[EFAULT] The address sv does not specify a valid part of the`
130			`process address space.`
131
132			`[ENFILE] The system file table is full.`
133
134			`SEE ALSO`
135			`pipe(2), read(2), write(2)`
136
137			`BUGS`
138			`This call is currently implemented only for the LOCAL domain. Many oper-`
139			`ating systems only accept a protocol of PF_UNSPEC, so that should be used`
140			`instead of PF_LOCAL for maximal portability.`
141
142			`STANDARDS`
143			`The socketpair() function conforms to X/Open Portability Guide Issue 4.2`
144			(``XPG4.2'').
145
146			`HISTORY`
147			`The socketpair() function call appeared in 4.2BSD.`
148
149			`BSD June 4, 1993 BSD`
150			`</PRE`
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