07-17-2002
You can't do that.
Your accept() should be able to either block or not block at your control. If you turned on a non-blocking option on the socket, then yes your accept() call will return an error if there are no pending connections. If you then decide to sleep(), then any connections that arrive while your server is asleep will become become pending connections. After the sleep(), it could re-issue the accept() and establish a connection.
Turning on a non-blocking option and then polling from time to time is supposed to work. But I have never seen it done. I would not sleep for 300 seconds though. That is a very long time to keep a connection waiting for a connect.
But the usual method is to allow accept() to block and wait for a connection to occur.
If your accept() is not blocking then somehow you must have asked it not to. The usual way of doing this would be to have set O_NONBLOCK.
If your accept() call does not behave as I described, then it must be broken. But I find that hard to believe. Never blocking would be a very serious problem.
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LEARN ABOUT OPENSOLARIS
accept
accept(3SOCKET) Sockets Library Functions accept(3SOCKET)
NAME
accept - accept a connection on a socket
SYNOPSIS
cc [ flag ... ] file ... -lsocket -lnsl [ library ... ]
#include <sys/types.h>
#include <sys/socket.h>
int accept(int s, struct sockaddr *addr, socklen_t *addrlen);
DESCRIPTION
The argument s is a socket that has been created with socket(3SOCKET) and bound to an address with bind(3SOCKET), and that is listening for
connections after a call to listen(3SOCKET). The accept() function extracts the first connection on the queue of pending connections, cre-
ates a new socket with the properties of s, and allocates a new file descriptor, ns, for the socket. If no pending connections are present
on the queue and the socket is not marked as non-blocking, accept() blocks the caller until a connection is present. If the socket is
marked as non-blocking and no pending connections are present on the queue, accept() returns an error as described below. The accept()
function uses the netconfig(4) file to determine the STREAMS device file name associated with s. This is the device on which the connect
indication will be accepted. The accepted socket, ns, is used to read and write data to and from the socket that connected to ns. It is not
used to accept more connections. The original socket (s) remains open for accepting further connections.
The argument addr is a result parameter that is filled in with the address of the connecting entity as it is known to the communications
layer. The exact format of the addr parameter is determined by the domain in which the communication occurs.
The argument addrlen is a value-result parameter. Initially, it contains the amount of space pointed to by addr; on return it contains the
length in bytes of the address returned.
The accept() function is used with connection-based socket types, currently with SOCK_STREAM.
It is possible to select(3C) or poll(2) a socket for the purpose of an accept() by selecting or polling it for a read. However, this will
only indicate when a connect indication is pending; it is still necessary to call accept().
RETURN VALUES
The accept() function returns -1 on error. If it succeeds, it returns a non-negative integer that is a descriptor for the accepted socket.
ERRORS
accept() will fail if:
EBADF The descriptor is invalid.
ECONNABORTED The remote side aborted the connection before the accept() operation completed.
EFAULT The addr parameter or the addrlen parameter is invalid.
EINTR The accept() attempt was interrupted by the delivery of a signal.
EMFILE The per-process descriptor table is full.
ENODEV The protocol family and type corresponding to s could not be found in the netconfig file.
ENOMEM There was insufficient user memory available to complete the operation.
ENOSR There were insufficient STREAMS resources available to complete the operation.
ENOTSOCK The descriptor does not reference a socket.
EOPNOTSUPP The referenced socket is not of type SOCK_STREAM.
EPROTO A protocol error has occurred; for example, the STREAMS protocol stack has not been initialized or the connection has
already been released.
EWOULDBLOCK The socket is marked as non-blocking and no connections are present to be accepted.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO
poll(2), bind(3SOCKET), connect(3SOCKET), listen(3SOCKET), select(3C), socket.h(3HEAD), socket(3SOCKET), netconfig(4), attributes(5)
SunOS 5.11 24 Jan 2002 accept(3SOCKET)