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@(#)accept.2 6.4 (Berkeley) 02/14/89
#include <sys/types.h> #include <sys/socket.h>ns = accept(s, addr, addrlen) int ns, s; struct sockaddr *addr; int *addrlen;
The argument addr is a result parameter that is filled in with the address of the connecting entity, as known to the communications layer. The exact format of the addr parameter is determined by the domain in which the communication is occurring. The addrlen is a value-result parameter; it should initially contain the amount of space pointed to by addr ; on return it will contain the actual length (in bytes) of the address returned. This call is used with connection-based socket types, currently with SOCK_STREAM.
It is possible to select (2) a socket for the purposes of doing an accept by selecting it for read.
20 [EBADF] The descriptor is invalid.
20 [ENOTSOCK] The descriptor references a file, not a socket.
20 [EOPNOTSUPP] The referenced socket is not of type SOCK_STREAM.
20 [EFAULT] The addr parameter is not in a writable part of the user address space.
20 [EWOULDBLOCK] The socket is marked non-blocking and no connections are present to be accepted.