src/utils_cmd_getval.[ch]: Moved the `getval' command out of the unixsock plugin.

[collectd.git] / src / utils_cmd_getval.c

diff --git a/src/utils_cmd_getval.c b/src/utils_cmd_getval.c
new file mode 100644 (file)
index 0000000..a4edf4f
--- /dev/null
+++ b/src/utils_cmd_getval.c
@@ -0,0 +1,119 @@
+/**
+ * collectd - src/utils_cms_getval.c
+ * Copyright (C) 2008  Florian octo Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * Author:
+ *   Florian octo Forster <octo at verplant.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#include "utils_cache.h"
+
+int handle_getval (FILE *fh, char **fields, int fields_num)
+{
+  char *hostname;
+  char *plugin;
+  char *plugin_instance;
+  char *type;
+  char *type_instance;
+  gauge_t *values;
+  size_t values_num;
+
+  const data_set_t *ds;
+
+  int   status;
+  int   i;
+
+  if (fields_num != 2)
+  {
+    DEBUG ("unixsock plugin: Wrong number of fields: %i", fields_num);
+    fprintf (fh, "-1 Wrong number of fields: Got %i, expected 2.\n",
+       fields_num);
+    fflush (fh);
+    return (-1);
+  }
+  DEBUG ("unixsock plugin: Got query for `%s'", fields[1]);
+
+  if (strlen (fields[1]) < strlen ("h/p/t"))
+  {
+    fprintf (fh, "-1 Invalied identifier, %s", fields[1]);
+    fflush (fh);
+    return (-1);
+  }
+
+  status = parse_identifier (fields[1], &hostname,
+      &plugin, &plugin_instance,
+      &type, &type_instance);
+  if (status != 0)
+  {
+    DEBUG ("unixsock plugin: Cannot parse `%s'", fields[1]);
+    fprintf (fh, "-1 Cannot parse identifier.\n");
+    fflush (fh);
+    return (-1);
+  }
+
+  ds = plugin_get_ds (type);
+  if (ds == NULL)
+  {
+    DEBUG ("unixsock plugin: plugin_get_ds (%s) == NULL;", type);
+    fprintf (fh, "-1 Type `%s' is unknown.\n", type);
+    fflush (fh);
+    return (-1);
+  }
+
+  values = NULL;
+  values_num = 0;
+  status = uc_get_rate_by_name (fields[1], &values, &values_num);
+  if (status != 0)
+  {
+    fprintf (fh, "-1 No such value");
+    fflush (fh);
+    return (-1);
+  }
+
+  if (ds->ds_num != values_num)
+  {
+    ERROR ("ds[%s]->ds_num = %i, "
+       "but uc_get_rate_by_name returned %i values.",
+       ds->type, ds->ds_num, values_num);
+    fprintf (fh, "-1 Error reading value from cache.\n");
+    fflush (fh);
+    sfree (values);
+    return (-1);
+  }
+
+  fprintf (fh, "%u", (unsigned int) values_num);
+  for (i = 0; i < values_num; i++)
+  {
+    fprintf (fh, " %s=", ds->ds[i].name);
+    if (isnan (values[i]))
+      fprintf (fh, "NaN");
+    else
+      fprintf (fh, "%12e", values[i]);
+  }
+
+  fprintf (fh, "\n");
+  fflush (fh);
+
+  sfree (values);
+
+  return (0);
+} /* int handle_getval */
+
+/* vim: set sw=2 sts=2 ts=8 : */