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 OPENSOLARIS
cl_eventd
cl_eventd(1M) System Administrator Commands cl_eventd(1M)
NAME
cl_eventd - Cluster event daemon
SYNOPSIS
/usr/cluster/lib/sc/cl_eventd [-v]
DESCRIPTION
The cl_eventd daemon is started at boot time to monitor system events that are generated by other cluster components. This daemon also for-
wards these events to other cluster nodes. Only the events of class EC_Cluster are forwarded to other cluster nodes.
OPTIONS
The following option is supported:
-v Send additional troubleshooting and debugging information to syslogd(1M).
FILES
/usr/cluster/lib/sc/cl_eventd Cluster event daemon
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscu |
+-----------------------------+-----------------------------+
SEE ALSO
syseventd(1M), syslog(3C)
NOTES
The cl_eventd daemon does not provide a publicly accessible interface.
Sun Cluster 3.2 5 May 2006 cl_eventd(1M)