--- src/exec.c.1	2014-05-21 11:14:24.477643257 +0200
+++ src/exec.c	2014-05-21 13:10:26.710163412 +0200
@@ -427,7 +427,7 @@ static int fork_child (program_list_t *p
   int status;
   int pid;
 
-  if (pl->pid != 0)
+  if (!pl || pl->pid != 0)
     return (-1);
 
   status = pipe (fd_pipe_in);
@@ -466,6 +466,23 @@ static int fork_child (program_list_t *p
     int fd_num;
     int fd;
 
+    /* free memory in children */
+    {
+      program_list_t *pl;
+      program_list_t *next;
+      pl = pl_head;
+      while (pl != NULL)
+      {
+	next = pl->next;
+	sfree (pl->exec);
+	sfree (pl->argv);
+	sfree (pl->user);
+	sfree (pl);
+	pl = next;
+      } /* while (pl) */
+      pl_head = NULL;
+    }
+
     /* Close all file descriptors but the pipe end we need. */
     fd_num = getdtablesize ();
     for (fd = 0; fd < fd_num; fd++)
@@ -546,16 +563,18 @@ static int parse_line (char *buffer) /*
   }
 } /* int parse_line }}} */
 
+#define _memmove(buffer, pbuffer, len) {  \
+   char tmp[1200];			  \
+   memcpy(tmp, pbuffer, len);		  \
+   memcpy(buffer, tmp, len);		  \
+}	    
+
 static void *exec_read_one (void *arg) /* {{{ */
 {
   program_list_t *pl = (program_list_t *) arg;
   int fd, fd_err, highest_fd;
   fd_set fdset, copy;
   int status;
-  char buffer[1200];  /* if not completely read */
-  char buffer_err[1024];
-  char *pbuffer = buffer;
-  char *pbuffer_err = buffer_err;
 
   status = fork_child (pl, NULL, &fd, &fd_err);
   if (status < 0)
@@ -564,6 +583,7 @@ static void *exec_read_one (void *arg) /
     pthread_mutex_lock (&pl_lock);
     pl->flags &= ~PL_RUNNING;
     pthread_mutex_unlock (&pl_lock);
+    sfree (arg);
     pthread_exit ((void *) 1);
   }
   pl->pid = status;
@@ -583,6 +603,10 @@ static void *exec_read_one (void *arg) /
   while (1)
   {
     int len;
+    char buffer[1200];  /* if not completely read */
+    char buffer_err[1024];
+    char *pbuffer = buffer;
+    char *pbuffer_err = buffer_err;
 
     status = select (highest_fd + 1, &copy, NULL, NULL, NULL);
     if (status < 0)
@@ -623,7 +647,7 @@ static void *exec_read_one (void *arg) /
       if (pbuffer - buffer < len)
       {
         len -= pbuffer - buffer;
-        memmove(buffer, pbuffer, len);
+        _memmove(buffer, pbuffer, len);
         pbuffer = buffer + len;
       }
       else
@@ -675,7 +699,7 @@ static void *exec_read_one (void *arg) /
       if (pbuffer_err - buffer_err < len)
       {
         len -= pbuffer_err - buffer_err;
-        memmove(buffer_err, pbuffer_err, len);
+        _memmove(buffer_err, pbuffer_err, len);
         pbuffer_err = buffer_err + len;
       }
       else
@@ -805,6 +829,7 @@ static int exec_init (void) /* {{{ */
 
 static int exec_read (void) /* {{{ */
 {
+  int err;
   program_list_t *pl;
 
   for (pl = pl_head; pl != NULL; pl = pl->next)
@@ -825,10 +850,13 @@ static int exec_read (void) /* {{{ */
     }
     pl->flags |= PL_RUNNING;
     pthread_mutex_unlock (&pl_lock);
-
     pthread_attr_init (&attr);
-    pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
-    pthread_create (&t, &attr, exec_read_one, (void *) pl);
+    err = pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
+    fprintf(stderr, ">>> pthread_attr_setdetachstate returns %d\n", err);
+    err = pthread_attr_setstacksize(&attr, (size_t)1024*1024);
+    fprintf(stderr, ">>> pthread_attr_setstacksize returns %d\n", err);    
+    err = pthread_create (&t, &attr, exec_read_one, (void *) pl);
+    fprintf(stderr, ">>> pthread_create returns %d\n", err);    
     pthread_attr_destroy (&attr);
   } /* for (pl) */
 
@@ -840,6 +868,7 @@ static int exec_notification (const noti
 {
   program_list_t *pl;
   program_list_and_notification_t *pln;
+  int err;
 
   for (pl = pl_head; pl != NULL; pl = pl->next)
   {
@@ -871,8 +900,12 @@ static int exec_notification (const noti
     plugin_notification_meta_copy (&pln->n, n);
 
     pthread_attr_init (&attr);
-    pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
-    pthread_create (&t, &attr, exec_notification_one, (void *) pln);
+    err = pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
+    fprintf(stderr, ">>> pthread_attr_setdetachstate returns %d\n", err);
+    err = pthread_attr_setstacksize(&attr, (size_t)1024*1024);
+    fprintf(stderr, ">>> pthread_attr_setstacksize returns %d\n", err);    
+    err = pthread_create (&t, &attr, exec_notification_one, (void *) pln);
+    fprintf(stderr, ">>> pthread_create returns %d\n", err);    
     pthread_attr_destroy (&attr);
   } /* for (pl) */
 
@@ -895,6 +928,8 @@ static int exec_shutdown (void) /* {{{ *
       INFO ("exec plugin: Sent SIGTERM to %hu", (unsigned short int) pl->pid);
     }
 
+    sfree (pl->exec);
+    sfree (pl->argv);
     sfree (pl->user);
     sfree (pl);