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 OSF1
clu_is_member
clu_is_member(3) Library Functions Manual clu_is_member(3)
NAME
clu_is_member, clu_is_ready - Determine whether the local system is currently a cluster member or has been configured to be a cluster mem-
ber
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <sys/clu.h>
boolean_t clu_is_member ();
boolean_t clu_is_ready ();
DESCRIPTION
The clu_is_member function determines whether the local system is currently a cluster member (that is, the TruCluster Server software has
been installed and configured, the system has booted a clusterized kernel, and the connection manager has allowed the system to join the
cluster membership).
The clu_is_ready function determines whether the local system has been configured to run in a cluster (that is, the TruCluster Server soft-
ware has been installed and configured, and the system has booted a clusterized kernel). The clu_is_ready function is most useful to code
that runs in the boot path before the connection manager establishes the cluster membership.
RETURN VALUES
Upon completion, the clu_is_member function returns TRUE if the local system is currently a cluster member, FALSE otherwise.
Upon completion, the clu_is_ready function returns TRUE if the local system has booted from a clusterized kernel, FALSE otherwise.
RELATED INFORMATION
Functions: versw(3), clu_get_info(3)
Commands: versw(8) delim off
clu_is_member(3)