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 argu

ments 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.

FILES

/dev/ttyd? dialin devices, hardwired terminals

SEE ALSO

stty(1), sio(4)

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 control now that these capabilities are standard.

AUTHORS

Christopher G. Demetriou

BSD May 15, 1994

BSD