for ganglia v3.1.2, the patch below ensures that all 'string' metrics
are null terminated for python-based user metrics. without this patch,
any string metric that is longer than MAX_G_STRING_SIZE (currently 32
bytes), will not be null terminated and will corrupt the value in the
metric.
also, regarding MAX_G_STRING_SIZE, would it be possible to increase it
in future releases? i've currently set it to 128 in
include/gm_value.h.
- gb
=============
*** ganglia-3.1.2/gmond/modules/python/mod_python.c 2009-01-28
15:23:20.000000000 -0800
--- /tmp/patch-files/gmond/modules/python/mod_python.c 2009-07-08
13:04:40.000000000 -0700
***************
*** 127,134 ****
--- 127,138 ----
}
else if (PyString_Check(dv)) {
char* p = PyString_AsString(dv);
strncpy(bfr, p, len);
+ /*
+ * ensure bfr is null terminated
+ */
+ bfr[len-1] = '\0';
}
else if (PyFloat_Check(dv)) {
double v = PyFloat_AsDouble(dv);
snprintf(bfr, len, "%f", v);
***************
*** 422,430 ****
gmi->name = apr_pstrdup (pool, minfo->mname);
gmi->tmax = minfo->tmax;
if (!strcasecmp(minfo->vtype, "string")) {
gmi->type = GANGLIA_VALUE_STRING;
! gmi->msg_size = UDP_HEADER_SIZE+32;
}
else if (!strcasecmp(minfo->vtype, "uint")) {
gmi->type = GANGLIA_VALUE_UNSIGNED_INT;
gmi->msg_size = UDP_HEADER_SIZE+8;
--- 426,434 ----
gmi->name = apr_pstrdup (pool, minfo->mname);
gmi->tmax = minfo->tmax;
if (!strcasecmp(minfo->vtype, "string")) {
gmi->type = GANGLIA_VALUE_STRING;
! gmi->msg_size = UDP_HEADER_SIZE+MAX_G_STRING_SIZE;
}
else if (!strcasecmp(minfo->vtype, "uint")) {
gmi->type = GANGLIA_VALUE_UNSIGNED_INT;
gmi->msg_size = UDP_HEADER_SIZE+8;
=============
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