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Full Discussion: sockets - can you send data while waiting on select()
Top Forums Programming sockets - can you send data while waiting on select() Post 302526170 by Loic Domaigne on Monday 30th of May 2011 03:49:41 PM
Old 05-30-2011
Quote:
Originally Posted by scubanarc
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.
We're doing that without any problem. We have one thread that blocks on the socket waiting for the server to send data; while another thread might independently send some data to the server. Works like a charm.

As mentioned By Coronna688, the best way for you to identify the problem (and for us to help you) is to write a minimalistic example - that compiles and show what your problem is.

Good Luck,
Loïc
 

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LEARN ABOUT CENTOS

abrt-server

ABRT-SERVER(1)							    ABRT Manual 						    ABRT-SERVER(1)

NAME

       abrt-server - Unix socket for ABRT.

SYNOPSIS

       abrt-server [-u UID] [-spv[v]...]

DESCRIPTION

       abrt-server is executed by abrtd daemon to handle socket connections. Every application in system is able to invoke creation of a new
       problem directory by following the communication protocol (described below in section PROTOCOL).

OPTIONS

       -u UID
	   Use UID as client uid

       -s
	   Log to system log.

       -p
	   Add program names to log.

       -v
	   Log more detailed debugging information.

PROTOCOL

       Initializing new dump: connect to UNIX domain socket /var/run/abrt.socket

       Providing data (writting data to the socket):

	   -> "POST / HTTP/1.1
"
	   -> "
"
	   -> "type=string"
	      string, maximum length 100 bytes
	   -> "reason=string"
	      string, maximum length 512 bytes
	   -> "pid=number"
	      number, 0 - PID_MAX (/proc/sys/kernel/pid_max)
	   -> "executable=string"
	      string, maximum length ~MAX_PATH
	   -> "backtrace=string"
	      string, maximum length 1 MB
	   -> (close writing half of the socket)
	   <- "HTTP/1.1 201 
"
	   <- "
"

       Deleting problem directory:

	   -> "DELETE <directory_name> HTTP/1.1
"
	   -> "
"
	   -> (close writing half of the socket)
	   <- "HTTP/1.1 200 
"
	   <- "
"

AUTHORS

       o   ABRT team

abrt 2.1.11							    06/18/2014							    ABRT-SERVER(1)
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