GC !__DragonFly__ section.
[dragonfly.git] / sbin / comcontrol / comcontrol.8
CommitLineData
984263bc 1.\" $FreeBSD: src/sbin/comcontrol/comcontrol.8,v 1.15.2.7 2002/08/21 18:58:13 trhodes Exp $
1de703da 2.\" $DragonFly: src/sbin/comcontrol/comcontrol.8,v 1.2 2003/06/17 04:27:32 dillon Exp $
984263bc
MD
3.Dd May 15, 1994
4.Dt COMCONTROL 8
5.Os
6.Sh NAME
7.Nm comcontrol
8.Nd control a special tty device
9.Sh SYNOPSIS
10.Nm
11.Ar special_device
12.Op dtrwait Ar number
13.Op drainwait Ar number
14.Sh DESCRIPTION
15The
16.Nm
17utility is used to examine and modify some of the special characteristics
18of the specified tty device.
19If no arguments other than the device (or "-" for stdin)
20are specified,
21it prints the settings of all controllable characteristics.
22This usage requires only read access on the device.
23Only the superuser can change the settings.
24.Pp
25The following options are available:
26.Bl -tag -width indent
27.It Cm dtrwait Ar number
28Set the time to wait after dropping DTR
29to the given number.
30The units are hundredths of a second.
31The default is 300 hundredths, i.e., 3 seconds.
32This option needed mainly to set proper recover time after
33modem reset.
34.It Cm drainwait Ar number
35Set the time to wait for output drain
36to the given number.
37The units are seconds.
38The default is 0 minutes, 0 means
39waiting forever.
40This option needed mainly to specify upper limit of minutes
41to prevent modem hanging.
42.El
43.Pp
44The standard way to use
45.Nm
46is to put invocations of it in the
47.Pa /etc/rc.serial
48startup script.
49.Sh SEE ALSO
50.Xr stty 1 ,
51.Xr sio 4
52.Sh FILES
53.Bl -tag -width /dev/ttyd? -compact
54.It Pa /dev/ttyd?
55dialin devices, hardwired terminals
56.It Pa /dev/cuaa?
57dialout devices
58.El
59.Sh AUTHORS
60.An Christopher G. Demetriou
61.Sh HISTORY
62Originally part of cgd's com package patches, version 0.2.1, to
63.Bx 386 0.1 .
64Once controlled bidirectional capabilities. Little is left to control now
65that these capabilities are standard.