SOCKET 2
NAME
socket - creates a socket.
SYNOPSIS
#include <sys/socket.h>
int socket(int domain, int type, int protocol);
DESCRIPTION
socket() creates a socket in the specified domain. A socket
is a communications endpoint. Currently two values are supported
for domain, PF_INET for internet sockets and PF_UNIX for
local unix domain sockets. The type of socket can be
SOCK_STREAM for TCP sockets in the PF_INET domain or
SOCK_DGRAM for UDP sockets in the PF_INET domain. For
sockets in the PF_UNIX domain, SOCK_STREAM, SOCK_DGRAM, and
SOCK_SEQPACKET are supported values for type. The value
of protocol is always 0 or IPPROTO_TCP for TCP sockets or
IPPROTO_UDP for UDP sockets.
RETURN VALUES
On success, this function returns a numeric socket descriptor.
On error, -1 is returned and errno is set.
ERRORS
15 [EAFNOSUPPORT] The domain is not supported.
15 [EPROTOTYPE] The protocol is not supported by the domain.
15 [EMFILE] The process descriptor table is full.
15 [ENFILE] The system descriptor table is full.
15 [ENOSPC] Could not allocate a file descriptor.
SEE ALSO
socketpair(2), bind(2), listen(2), accept(2), connect(2), shutdown(2), getsockopt(2), setsockopt(2), unix(8)