SOCKET(2)SOCKET(2)NAMEsocket - creates a socket.
SYNOPSIS
#include <sys/socket.h>
int socket(int domain, int type, int protocol);
DESCRIPTIONsocket() creates a socket in the specified domain. A socket is a commuâ
nications 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
[EAFNOSUPPORT] The domain is not supported.
[EPROTOTYPE] The protocol is not supported by the domain.
[EMFILE] The process descriptor table is full.
[ENFILE] The system descriptor table is full.
[ENOSPC] Could not allocate a file descriptor.
SEE ALSOsocketpair(2), bind(2), listen(2), accept(2), connect(2), shutdown(2),
getsockopt(2), setsockopt(2), ip(4), inet(8), unix(8)SOCKET(2)