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diff --git a/plugins/check_ntp_peer.c b/plugins/check_ntp_peer.c
index 67ee0a7..73ba899 100644
--- a/plugins/check_ntp_peer.c
+++ b/plugins/check_ntp_peer.c
@@ -175,23 +175,56 @@ void print_ntp_control_message(const ntp_control_message *p){
175 } 175 }
176} 176}
177 177
178/*
179 * Extract the value from NTP key/value pairs, or return NULL.
180 * The value returned can be free()ed.
181 */
178char *extract_value(const char *varlist, const char *name){ 182char *extract_value(const char *varlist, const char *name){
179 char *tmpvarlist=NULL, *tmpkey=NULL, *value=NULL; 183 char *tmp=NULL, *value=NULL;
180 int last=0; 184 int i;
181
182 /* The following code require a non-empty varlist */
183 if(strlen(varlist) == 0)
184 return NULL;
185 185
186 tmpvarlist = strdup(varlist); 186 /* Strip any leading space */
187 tmpkey = strtok(tmpvarlist, "=");
188 187
189 do { 188 while (1) {
190 if(strstr(tmpkey, name) != NULL) { 189 for (varlist; isspace(varlist[0]); varlist++);
191 value = strtok(NULL, ","); 190 if (strncmp(name, varlist, strlen(name)) == 0) {
192 last = 1; 191 varlist += strlen(name);
192 /* strip trailing spaces */
193 for (varlist; isspace(varlist[0]); varlist++);
194
195 if (varlist[0] == '=') {
196 /* We matched the key, go past the = sign */
197 varlist++;
198 /* strip leading spaces */
199 for (varlist; isspace(varlist[0]); varlist++);
200
201 if (tmp = index(varlist, ',')) {
202 /* Value is delimited by a comma */
203 if (tmp-varlist == 0) continue;
204 value = (char *)malloc(tmp-varlist+1);
205 strncpy(value, varlist, tmp-varlist);
206 value[tmp-varlist] = '\0';
207 } else {
208 /* Value is delimited by a \0 */
209 if (strlen(varlist) == 0) continue;
210 value = (char *)malloc(strlen(varlist) + 1);
211 strncpy(value, varlist, strlen(varlist));
212 value[strlen(varlist)] = '\0';
213 }
214 break;
215 }
216 }
217 if (tmp = index(varlist, ',')) {
218 /* More keys, keep going... */
219 varlist = tmp + 1;
220 } else {
221 /* We're done */
222 break;
193 } 223 }
194 } while (last == 0 && (tmpkey = strtok(NULL, "="))); 224 }
225
226 /* Clean-up trailing spaces/newlines */
227 if (value) for (i=strlen(value)-1; isspace(value[i]); i--) value[i] = '\0';
195 228
196 return value; 229 return value;
197} 230}