--- libelwix/src/pio.c	2020/06/19 13:06:17	1.7
+++ libelwix/src/pio.c	2020/06/19 23:07:20	1.8
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: pio.c,v 1.7 2020/06/19 13:06:17 misho Exp $
+* $Id: pio.c,v 1.8 2020/06/19 23:07:20 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -65,6 +65,7 @@ static pthread_mutex_t pidlist_mutex = PTHREAD_MUTEX_I
  * @command = command
  * @type = type
  * @ppid = return pid of child program
+ * 	If value of *ppid is -1 when invoke routine then child will be session leader
  * return: NULL error or !=NULL open program
  */
 #ifdef POPEN_STREAM
@@ -82,7 +83,8 @@ e_popen(const char *command, const char *type, pid_t *
  *
  * @command = command
  * @type = type
- * @ppid = return pid of child program
+ * @ppid = return pid of child program 
+ * 	If value of *ppid is -1 when invoke routine then child will be session leader
  * @fds = file descriptor array for close when fork
  * @fdslen = fds number of descriptors
  * return: NULL error or !=NULL open program
@@ -163,6 +165,9 @@ e_popen2(const char *command, const char *type, pid_t 
 #endif
 		/* NOTREACHED */
 	case 0:				/* Child. */
+		if (ppid && *ppid == -1)
+			setsid();
+
 		if (fds && fdslen) {
 			for (i = 0; i < fdslen; i++)
 				close(fds[i]);