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Top Forums Programming sockets - can you send data while waiting on select() Post 302525910 by scubanarc on Sunday 29th of May 2011 04:13:45 PM
Old 05-29-2011
Quote:
Originally Posted by Corona688
Isn't that what accept is for? select() can indeed wait until an existing socket is ready to send or receive...
I think that Corona has it right. At least that's my understanding.

So the real heart of the question is whether or not a single socket can be used for blocking and sending at the same time. Has anyone attempted this? We are having strange issues when doing it, like seg faults.
 

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shutdown(2)							System Calls Manual						       shutdown(2)

NAME
shutdown - Shuts down socket send and receive operations SYNOPSIS
#include <sys/socket.h> int shutdown ( int socket, int how ); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: shutdown(): XNS5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Specifies the file descriptor of the socket. Specifies the type of shutdown. Values are: To disable further receive operations To disable further send operations To disable further send operations and receive operations DESCRIPTION
The shutdown() function disables receive and/or send operations on the specified socket. RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS
If the shutdown() function fails, errno may be set to one of the following values: The socket parameter is not valid. The how argument is invalid. Insufficient resources are available in the system to complete the call. The available STREAMS resources were insufficient for the operation to complete. The socket is not connected. The socket parameter refers to a file, not a socket. RELATED INFORMATION
Functions: getsockopt(2), read(2), recv(2), recvfrom(2), recvmsg(2), select(2), send(2), sendto(2), setsockopt(2), socket(2), write(2) Standards: standards(5) delim off shutdown(2)
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