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Top Forums Programming Trouble with pipes in chat client on linux Post 302718305 by expl on Friday 19th of October 2012 12:19:52 PM
Old 10-19-2012
If you are going with a terminal interface you might want to consider redesigning the whole client to be single threaded. You do not really need to have separate process for handling I/O on a socket, you should read some tutorials on asynchronous I/O programming. The trick is to use select() function on your socket and on stdin descriptor to know when there is data from server or from keyboard to read and handle them one at a time. Having multiple processes or threads makes it very messy design when it can be much more clean and simple with a single thread.
 

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SCTP_PEELOFF(3) 					     Linux Programmer's Manual						   SCTP_PEELOFF(3)

NAME
sctp_peeloff - Branch off an association into a separate socket. SYNOPSIS
#include <sys/types.h> #include <sys/socket.h> #include <netinet/sctp.h> int sctp_peeloff(int sd, sctp_assoc_t assoc_id); DESCRIPTION
sctp_peeloff branches off an existing association assoc_id on a one-to-many style socket sd into a separate socket. The new socket is a one-to-one style socket. This is particularly desirable when, for instance, the application wishes to have a number of sporadic message senders/receivers remain under the original one-to-many style socket, but branch off those assocations carrying high volume data traffic into their own separate socket descriptors. RETURN VALUE
On success, the new socket descriptor representing the branched-off asociation is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
EBADF sd is not a valid descriptor. EINVAL The assoc id passed is invalid or if the socket is a one-to-one style socket. ENOTSOCK Argument is a descriptor for a file, not a socket. SEE ALSO
sctp(7) sctp_bindx(3), sctp_connectx(3), sctp_sendmsg(3), sctp_send(3), sctp_recvmsg(3), sctp_getpaddrs(3), sctp_getladdrs(3), sctp_opt_info(3), Linux 2.6 2005-10-25 SCTP_PEELOFF(3)
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