Move check_ntp's extract_value to utils_base.c.

[nagiosplug.git] / lib / utils_base.c

diff --git a/lib/utils_base.c b/lib/utils_base.c
index d6437fc8b0b85adb13e7f025c26d8fdbab5cfa76..a34cc5cc8430758fa9e54f0c6b6c5947511df73c 100644 (file)
--- a/lib/utils_base.c
+++ b/lib/utils_base.c
@@ -251,3 +251,60 @@ int np_warn_if_not_root(void) {
        }
        return status;
 }
+
+/*
+ * Extract the value from key/value pairs, or return NULL. The value returned
+ * can be free()ed.
+ * This function can be used to parse NTP control packet data and performance
+ * data strings.
+ */
+char *np_extract_value(const char *varlist, const char *name) {
+       char *tmp=NULL, *value=NULL;
+       int i;
+
+       while (1) {
+               /* Strip any leading space */
+               for (varlist; isspace(varlist[0]); varlist++);
+
+               if (strncmp(name, varlist, strlen(name)) == 0) {
+                       varlist += strlen(name);
+                       /* strip trailing spaces */
+                       for (varlist; isspace(varlist[0]); varlist++);
+
+                       if (varlist[0] == '=') {
+                               /* We matched the key, go past the = sign */
+                               varlist++;
+                               /* strip leading spaces */
+                               for (varlist; isspace(varlist[0]); varlist++);
+
+                               if (tmp = index(varlist, ',')) {
+                                       /* Value is delimited by a comma */
+                                       if (tmp-varlist == 0) continue;
+                                       value = (char *)malloc(tmp-varlist+1);
+                                       strncpy(value, varlist, tmp-varlist);
+                                       value[tmp-varlist] = '\0';
+                               } else {
+                                       /* Value is delimited by a \0 */
+                                       if (strlen(varlist) == 0) continue;
+                                       value = (char *)malloc(strlen(varlist) + 1);
+                                       strncpy(value, varlist, strlen(varlist));
+                                       value[strlen(varlist)] = '\0';
+                               }
+                               break;
+                       }
+               }
+               if (tmp = index(varlist, ',')) {
+                       /* More keys, keep going... */
+                       varlist = tmp + 1;
+               } else {
+                       /* We're done */
+                       break;
+               }
+       }
+
+       /* Clean-up trailing spaces/newlines */
+       if (value) for (i=strlen(value)-1; isspace(value[i]); i--) value[i] = '\0';
+
+       return value;
+}
+