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Full Discussion: regarding socket & mssage queue
Top Forums Programming regarding socket & mssage queue Post 302149922 by porter on Sunday 9th of December 2007 01:03:11 AM
Old 12-09-2007
In pseudo code-


int fd_server=socket(AF_INET,SOCK_STREAM,0);
bind(fd_server,...
listen(fd_server,..

when socket fd_server is readable do

fd_client=accept(fd_server,...)

then use the fd_client to send() and recv() on, and finally close() when you are finished with that client.

While you have one client, another client can come in and try and connect, so hence you need to work out how to accept and manage multiple client connections each with their own file descriptor.
 

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LEARN ABOUT PHP

msg_stat_queue

MSG_STAT_QUEUE(3)							 1							 MSG_STAT_QUEUE(3)

msg_stat_queue - Returns information from the message queue data structure

SYNOPSIS

       array msg_stat_queue (resource  $queue)

DESCRIPTION

       msg_stat_queue(3) returns the message queue meta data for the message queue specified by the $queue. This is useful, for example, to deter-
       mine which process sent the message that was just received.

PARAMETERS

	      o $queue
		- Message queue resource handle

RETURN VALUES

	The return value is an array whose keys and values have the following meanings:

       Array structure for msg_stat_queue

       +--------------+---------------------------------------------------+
       |	      | 						  |
       |msg_perm.uid  | 						  |
       |	      | 						  |
       |	      | 	The uid of the owner of the queue.	  |
       |	      | 						  |
       |	      | 						  |
       |msg_perm.gid  | 						  |
       |	      | 						  |
       |	      | 	The gid of the owner of the queue.	  |
       |	      | 						  |
       |	      | 						  |
       |msg_perm.mode | 						  |
       |	      | 						  |
       |	      | 	The file access mode of the queue.	  |
       |	      | 						  |
       |	      | 						  |
       |  msg_stime   | 						  |
       |	      | 						  |
       |	      |  The time that the last message was sent  to  the |
       |	      | queue.						  |
       |	      | 						  |
       |	      | 						  |
       |  msg_rtime   | 						  |
       |	      | 						  |
       |	      |  The time that the last message was received from |
       |	      | the queue.					  |
       |	      | 						  |
       |	      | 						  |
       |  msg_ctime   | 						  |
       |	      | 						  |
       |	      |     The time that the queue was last changed.	  |
       |	      | 						  |
       |	      | 						  |
       |  msg_qnum    | 						  |
       |	      | 						  |
       |	      |  The number of messages waiting to be  read  from |
       |	      | the queue.					  |
       |	      | 						  |
       |	      | 						  |
       | msg_qbytes   | 						  |
       |	      | 						  |
       |	      |  The  maximum number of bytes allowed in one mes- |
       |	      | sage queue. On Linux, this value may be read  and |
       |	      | modified via /proc/sys/kernel/msgmnb.		  |
       |	      | 						  |
       |	      | 						  |
       |  msg_lspid   | 						  |
       |	      | 						  |
       |	      |  The  pid  of the process that sent the last mes- |
       |	      | sage to the queue.				  |
       |	      | 						  |
       |	      | 						  |
       |  msg_lrpid   | 						  |
       |	      | 						  |
       |	      |  The pid of the process that  received	the  last |
       |	      | message from the queue. 			  |
       |	      | 						  |
       +--------------+---------------------------------------------------+
SEE ALSO

       msg_remove_queue(3), msg_receive(3), msg_get_queue(3), msg_set_queue(3).

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