--- LPRng-3.8.4/src/common/checkpc.c.nonblock	Mon Jan 21 11:34:52 2002
+++ LPRng-3.8.4/src/common/checkpc.c	Mon Jan 21 11:34:53 2002
@@ -1096,7 +1096,7 @@
 			FPRINTF( STDERR, "Daughter re-opening line '%s'\n", serial_line );
 			if( Set_timeout() ){
 				Set_timeout_alarm( 1 );
-				fd = Checkwrite( serial_line, &statb, O_RDWR, 0, 0 );
+				fd = Checkwrite( serial_line, &statb, O_RDWR, 0, 1 );
 				if( fd >= 0 ) i = LockDevice( fd, 1 );
 			}
 			Clear_timeout();
@@ -1259,7 +1259,7 @@
 	 */
 	SNPRINTF( line, sizeof(line)) "/tmp/XX%dXX", getpid() );
 	FPRINTF( STDERR, "Checking Lockf '%s'\n", line );
-	if( (fd = Checkwrite(line, &statb, O_RDWR, 1, 0 )) < 0) {
+	if( (fd = Checkwrite(line, &statb, O_RDWR, 1, 1 )) < 0) {
 		err = errno;
 		FPRINTF( STDERR,
 			"open '%s' failed: wrong result - '%s'\n",
@@ -1278,7 +1278,7 @@
 	} else if ( pid == 0 ){
 		FPRINTF( STDERR, "Daughter re-opening and locking '%s'\n", line );
 		close( fd );
-		if( (fd = Checkwrite(line, &statb, O_RDWR, 1, 0 )) < 0) {
+		if( (fd = Checkwrite(line, &statb, O_RDWR, 1, 1 )) < 0) {
 			err = errno;
 			FPRINTF( STDERR,
 				"Daughter re-open '%s' failed: wrong result - '%s'\n",
@@ -1320,7 +1320,7 @@
 		int lock = 0;
 		FPRINTF( STDERR, "Daughter re-opening '%s'\n", line );
 		close( fd );
-		if( (fd = Checkwrite(line, &statb, O_RDWR, 1, 0 )) < 0) {
+		if( (fd = Checkwrite(line, &statb, O_RDWR, 1, 1 )) < 0) {
 			err = errno;
 			FPRINTF( STDERR,
 				"Daughter re-open '%s' failed: wrong result - '%s'\n",