Merge pull request #349 from neek78/small_changes

lsof_free_result(): handle result == NULL

Author: jiegec

include/lsof.h

@@ -572,13 +572,17 @@ enum lsof_error lsof_gather(struct lsof_context *ctx,
  * You should call `lsof_free_result` to free all `struct lsof_result`
  * before destroying the context.
  *
+ * ctx may be NULL.
+ *
  * You must not use the context anymore after this call.
  *
  * \since API version 1
  */
 void lsof_destroy(struct lsof_context *ctx);
 
 /** Free struct lsof_result
+ *
+ * result may be NULL.
  *
  * \since API version 1
  */

lib/lsof.c

@@ -732,6 +732,9 @@ void lsof_free_result(struct lsof_result *result) {
     int pi, fi;
     struct lsof_process *p;
     struct lsof_file *f;
+    if (!result) {
+        return;
+    }
     for (pi = 0; pi < result->num_processes; pi++) {
         p = &result->processes[pi];
         /* Free files */