SPNW56(1)							     SPNW56(1)



NAME
       spnw56 - serial port ttyS0 communication with NW56

SYNOPSIS
       spnw56 [-d device] [-l lockfile] [-v] [infilename] [outfilename]

DESCRIPTION
       Spnw56  is for synchronous non-canonical serial port communication with
       the NW56 ISP dial up service. The default port is /dev/ttyS0  at  38400
       baud.  The  default  semaphore lock file is /var/lock/LCK..ttyS0, which
       has an fcntl(2) advisory lock applied, also. The serial	port  is  con-
       trolled through termios(3), and is restored to original values on exit.
       The serial port child read process is created by fork(2) from the  par-
       ent  write  process,  and  both	processes  respond  to SIGINT = ^C and
       SIGTERM signals.

       The program is intended to provide a simple, and reliable, serial  port
       communication between two computers, over modems.

OPTIONS
       -d device
	      Device name, (/dev/ttyS0).

       -l lockfile
	      Lock file name, (/var/lock/LCK..ttyS0).

       -v     Print the program's version information

       infilename
	      Input filename, (stdin).

       outfilename
	      Output filename, (stdout).

WARNINGS
       The  termios(3)	and fopen(2) settings tested only on Linux 2.4, and on
       US Robotics 56K, V.92, and, 33.6 Sportster. No others were tested.

SEE ALSO
       spcid(1),  spgettermios(1)  spsettermios(1),  spttyS0(1),   spttyS1(1),
       spnw56(1), phone.sh(1)

DIAGNOSTICS
       Error  messages	for  incompatible  arguments,  inaccessible files, and
       opening and closing files.

AUTHORS
       ----------------------------------------------------------------------

       A license is hereby granted to reproduce this software source code and
       to create executable versions from this source code for personal,
       non-commercial use.  The copyright notice included with the software
       must be maintained in all copies produced.

       THIS PROGRAM IS PROVIDED "AS IS". THE AUTHOR PROVIDES NO WARRANTIES
       WHATSOEVER, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF
       MERCHANTABILITY, TITLE, OR FITNESS FOR ANY PARTICULAR PURPOSE.  THE
       AUTHOR DOES NOT WARRANT THAT USE OF THIS PROGRAM DOES NOT INFRINGE THE
       INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY IN ANY COUNTRY.

       Copyright (c) 1994-2005, John Conover, All Rights Reserved.

       Comments and/or bug reports should be addressed to:

	   john@email.johncon.com (John Conover)

       ----------------------------------------------------------------------



			       October 30, 2005 		     SPNW56(1)