Copyright (c) 2008 Marc Balmer <mbalmer@openbsd.org>
Copyright (c) 2009 Kevin Steves <stevesk@openbsd.org>
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.Dd $Mdocdate: May 6 2009 $ .Dt ENDRUN 4 .Os .Sh NAME .Nm endrun .Nd EndRun Technologies native time-of-day message timedelta sensor .Sh SYNOPSIS .Cd "pseudo-device endrun" Op Ar count .Sh DESCRIPTION This line discipline interfaces serial EndRun Technologies devices.
p The line discipline is enabled by the following sequence: d -literal -offset indent #include <sys/ioctl.h> int ldisc = ENDRUNDISC, fildes; ... ioctl(fildes, TIOCSETD, &ldisc); .Ed
p The byte stream is unaltered by the line discipline which maintains a timedelta sensor using the EndRun data. The timedelta sensor will appear as endrun* in the list of sensors and the delta (in nanoseconds) between the received time information and the local time can be accessed through the .Xr sysctl 8 interface. .Sh SENSOR STATES The quality of the timedelta is reported as the sensor status: l -tag -width "CRITICALXX" -offset indent t OK The time information is valid. The timedelta is safe to use for applications like .Xr ntpd 8 . t WARN The attached receiver has been indicating a warning condition for at least the last ten minutes. The timedelta should be used with care. t CRITICAL tty timestamping has been turned on but there is no PPS signal present or the receiver indicated a warning condition for at least the last twenty minutes. Check your hardware. .El
p The status of a second sensor is used to report the status of the device itself using the Time Figure Of Merit (TFOM) character: l -tag -width "CRITICALXX" -offset indent t OK The clock is synchronized. TFOM is 6-8. t WARN The clock is synchronized and the time error is greater than 10ms or the clock is in the unsynchronized state. TFOM is 9. t CRITICAL The TFOM is invalid. .El .Sh SEE ALSO .Xr tty 4 , .Xr ldattach 8 , .Xr ntpd 8 , .Xr sysctl 8 .Sh HISTORY The .Nm interface first appeared in .Ox 4.6 .