src/configfile.[ch]: Implement "cf_util_get_string".

[collectd.git] / src / configfile.c

diff --git a/src/configfile.c b/src/configfile.c
index d401a2e..df04289 100644 (file)
--- a/src/configfile.c
+++ b/src/configfile.c
@@ -917,3 +917,28 @@ int cf_read (char *filename)
 
        return (0);
 } /* int cf_read */
+
+/* Assures the config option is a string, duplicates it and returns the copy in
+ * "ret_string". If necessary "*ret_string" is freed first. Returns zero upon
+ * success. */
+int cf_util_get_string (const oconfig_item_t *ci, char **ret_string) /* {{{ */
+{
+       char *string;
+
+       if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+       {
+               ERROR ("cf_util_get_string: The %s plugin requires "
+                               "exactly one string argument.", ci->key);
+               return (-1);
+       }
+
+       string = strdup (ci->values[0].value.string);
+       if (string == NULL)
+               return (-1);
+
+       if (*ret_string != NULL)
+               sfree (*ret_string);
+       *ret_string = string;
+
+       return (0);
+} /* }}} int cf_util_get_string */