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 DEBIAN
mkexfatfs
MKEXFATFS(8) System Manager's Manual MKEXFATFS(8)
NAME
mkexfatfs - create an exFAT file system
SYNOPSIS
mkexfatfs [ -i volume-id ] [ -n volume-name ] [ -p partition-first-sector ] [ -s sectors-per-cluster ] [ -v ] device
DESCRIPTION
mkexfatfs creates an exFAT file system on a block device. device is a special file corresponding to the device.
OPTIONS
Command line options available:
-i volume-id
A 32-bit hexadecimal number. By default a value based on current time is set.
-n volume-name
Volume name (label), up to 15 characters. By default no label is set.
-p partition-first-sector
First sector of the partition starting from the beginning of the whole disk. exFAT super block has a field for this value but in
fact it's optional and does not affect anything. Default is 0.
-s sectors-per-cluster
Number of physical sectors per cluster (cluster is an allocation unit in exFAT). Must be a power of 2, i.e. 1, 2, 4, 8, etc. Cluster
size can not exceed 32 MB. Default cluster sizes are: 4 KB if volume size is less than 256 MB, 32 KB if volume size is from 256 MB
to 32 GB, 128 KB if volume size is 32 GB or larger.
-v Print version and copyright.
EXIT CODES
Zero is returned on successful creation. Any other code means an error.
AUTHOR
Andrew Nayenko
SEE ALSO
mkfs(8)
January 2011 MKEXFATFS(8)