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SOCKETPAIR(2) System Calls Manual SOCKETPAIR(2) NAME socketpair -- create a pair of connected sockets LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <sys/types.h> #include <sys/socket.h> int socketpair(int domain, int type, int protocol, int *sv); DESCRIPTION The socketpair() system call creates an unnamed pair of connected sock- ets in the specified communications domain, of the specified type, and using the optionally specified protocol. The descriptors used in ref- erencing the new sockets are returned in sv[0] and sv[1]. The two sockets are indistinguishable. The SOCK_CLOEXEC and SOCK_NONBLOCK flags in the type argument apply to both descriptors. RETURN VALUES The socketpair() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indi- cate the error. 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 ma- chine. [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. SEE ALSO pipe(2), read(2), socket(2), write(2) STANDARDS The socketpair() system call conforms to IEEE Std 1003.1-2001 ("POSIX.1") and IEEE Std 1003.1-2008 ("POSIX.1"). HISTORY The socketpair() system call appeared in 4.2BSD. BUGS This call is currently implemented only for the Unix domain. FreeBSD 13.2 February 10, 2018 SOCKETPAIR(2)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | BUGS
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