08-24-2009
Locking issue with serial port
Hi,
In my application,I need to monitor the devices connected through serial port in solaris sparc 9 OS.I used c and java code for it and I am able to do the same but the problem comes when I restart the system and the open my application and try to monitor it.but I m unable to monitor the devices and getting the message --
Quote:
Warning: The serial port "/dev/term/a" cannot be opened for use.
Please verify that it is entered correctly and that it is not already in use.
but when I delete /var/lock/LCK..a file.I am able to monitor again.
So plz let me know why it is happening and how to solve it.
Thanks in advance..
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LEARN ABOUT LINUX
plmpower
plmpower(8) powerman plmpower(8)
NAME
plmpower - control Insteon/X10 devices via SmartLabs PLM 2412S
SYNOPSIS
plmpower --device serial-port
DESCRIPTION
plmpower is a helper program for powerman which enables communication with Insteon/X10 devices via SmartLabs Power Line Modem, model 2412S.
It is run interactively by the powerman daemon. It can also be useful as a standalone tool for debugging X10/Insteon networks based on the
above device.
NETWORK SETUP
Note the addresses of your Insteon/X10 devices. Plug the PLM into an AC outlet, preferably on the same electrical phase as the devices
under control. Devices are available to bridge phases if this is not possible.
Attach the PLM's serial port to your computer, and ensure that nothing else is using the serial port such as the system console or
getty(8). Run plmpower and try the interactive commands below to see if the devices respond reliably.
Once everything is working, configure powermand to run plmpower as a coprocess as described in powerman.conf(5).
OPTIONS
-d, --device serial-port
Specify the path to the special file connected to the PLM's serial port.
-t, --timeout msec
Set the Insteon timeout to the specified number of milliseconds (default 1000).
-x, --x10-attempts number
Set the number of times to run every X10 command (default 3). X10 does not provide an ACK/NAK mechanism like Insteon so we cannot
be certain that any particular X10 command completed, therefore X10 commands are issued multiple times to increase confidence.
INTERACTIVE COMMANDS
The following commands are accepted at the plmpower> prompt. Address arguments may be Insteon (e.g. 1A.2B.3C) or X10 (e.g. G12).
help Display help on the available commands.
info Get info about the PLM.
reset Reset the PLM (clears the all-link db).
on addr
Turn on device.
off addr
Turn off device.
status addr
Query status of device (Insteon only).
ping addr
Time round trip request/response to device (Insteon only).
FILES
/usr/sbin/plmpower
/etc/powerman/powerman.conf
ORIGIN
PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters. This software is open source and distributed under the terms
of the GNU GPL.
SEE ALSO
powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7).
http://sourceforge.net/projects/powerman
powerman-2.3.5 2009-02-09 plmpower(8)