12-13-2007
checking a connection still exists?
Hi I have a bit of c code which I'm trying to use as a relay between apache and a scgi cluster.
Example of problem code is below:
while((n = recv(scgiSock, local_data, MAX_LENGTH, 0)) > 0)
{
time(&t2);
time_now = t2 - t1;
if(time_now > TIMEOUT)
throw 1;
#ifdef UN_NES_DEBUG
logger("scgi : length := ", 1, n);
#endif
logger("sending data: length = ", 1, n);
logger("send ret:= %d", 1, send(receiveSock, local_data, n, 0));
count++;
bzero(local_data, MAX_LENGTH + 1);
sum += n;
logger("Receiving data: current sum = ", 1, sum);
}
I'm encountering a slight but probably easily solveable problem; sometimes apache drops the connection and as a result my program crashes out when trying to send data back on the socket.
Is there any way to check that the socket is still alive before sending data?
Cheers.
Fish.
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LEARN ABOUT SUSE
loggerappender
logger::appender(n) Object Oriented logging facility logger::appender(n)
__________________________________________________________________________________________________________________________________________________
NAME
logger::appender - Collection of predefined appenders for logger
SYNOPSIS
package require Tcl 8.2
package require logger::appender ?1.2?
::logger::appender::console -level level -service service ?options...?
::logger::appender::colorConsole -level level -service service ?options...?
_________________________________________________________________
DESCRIPTION
This package provides a predefined set of logger templates.
::logger::appender::console -level level -service service ?options...?
-level level
Name of the level to fill in as "priority" in the log procedure.
-service service
Name of the service to fill in as "category" in the log procedure.
-appenderArgs appenderArgs
Any additional arguments for the log procedure in list form
-conversionPattern conversionPattern
The log pattern to use (see logger::utils::createLogProc for the allowed substitutions).
-procName procName
Explicitly set the name of the created procedure.
-procNameVar procNameVar
Name of the variable to set in the calling context. This variable will contain the name of the procedure.
::logger::appender::colorConsole -level level -service service ?options...?
See ::logger::appender::colorConsole for a description of the applicable options.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category logger
of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
KEYWORDS
appender, logger
COPYRIGHT
Copyright (c) 2005 Aamer Akhter <aakhter@cisco.com>
log 1.2 logger::appender(n)