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COMCONTROL(8)		FreeBSD	System Manager's Manual		 COMCONTROL(8)

NAME
     comcontrol	-- control a special tty device

SYNOPSIS
     comcontrol	special_device [dtrwait	number]	[drainwait number]

DESCRIPTION
     The comcontrol utility is used to examine and modify some of the special
     characteristics of	the specified tty device.  If no arguments other than
     the device	(or "-"	for stdin) are specified, it prints the	settings of
     all controllable characteristics.	This usage requires only read access
     on	the device.  Only the superuser	can change the settings.

     The following options are available:

     dtrwait number
	     Set the time to wait after	dropping DTR to	the given number.  The
	     units are hundredths of a second.	The default is 300 hundredths,
	     i.e., 3 seconds.  This option needed mainly to set	proper recover
	     time after	modem reset.

     drainwait number
	     Set the time to wait for output drain to the given	number.	 The
	     units are seconds.	 The default is	5 minutes, 0 means waiting
	     forever.  This option needed mainly to specify upper limit	of
	     minutes to	prevent	modem hanging.

     The standard way to use comcontrol	is to put invocations of it in the
     /etc/rc.d/serial startup script.

SEE ALSO
     stty(1), sio(4)

FILES
     /dev/ttyd?	 dialin	devices, hardwired terminals
     /dev/cuaa?	 dialout devices

AUTHORS
     Christopher G. Demetriou

HISTORY
     Originally	part of	cgd's com package patches, version 0.2.1, to 386BSD
     0.1.  Once	controlled bidirectional capabilities.	Little is left to con-
     trol now that these capabilities are standard.

FreeBSD	10.1			 May 15, 1994			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | FILES | AUTHORS | HISTORY

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