RE: [Dev-C++] pipe to a file?

[Per W. <pw...@ia...>]

To my knowledge it is possible to implement fifo files in NT too. However,
you would then need the IFS SDK (I think that was the correct name), and
M$ charges a lot for this SDK. The SDK is targeted at implementation of
own file systems, file reparse points etc. In theory, you can do these
things with the normal DDK - Device Driver ToolKit - but you will miss
sample code and needed include files so you would then need to google
around for PD code.

The simplest solution is to implement a tail program that prenumerates
to changes. Then you don't have to constantly poll the size of the file to
detect new alarms.

/Per W

On Thu, 4 Dec 2003, Igor Pierscinski wrote:

> Hi,
>
> Answer to your question depends on how the aplication
> you mentioned sends alarms to the file. If it sends
> them to standart output and they are redirected to the file
> then you can write a program that reads standart input
> and for each line of input it does what you want to do
> (something like: <program_that_sends_alarms> | <your_alarm_filter> ).
> But most probably the situation is as follows: the program
> writes alarms directly to the file - then your easiest option
> is to write a program that opens this file for reading and
> periodically checks if something has changed in that file.
> If you know unix then command "tail -f" may give you an
> idea what i am talking about. It is the easiest solution and
> you can write an ordinary program that does that.
> As far as I know there is no such thing on windows as fifo
> special files that you know from unix.
> But if you want to do it the hard way you can search for
> infromation on how to write a filesystem filter driver - then
> you can intercept all the write operations to a file, but that
> is totally different story.
>
> Regards
>
> Igor Pierscinski
>
> > -----Original Message-----
> > From: Christian Sch=E4fer [mailto:ca...@kr...]
> > Sent: Thursday, December 04, 2003 8:42 AM
> > To: Dev...@li...
> > Subject: [Dev-C++] pipe to a file?
> >
> >
> > hi Dev-cpp-users,
> >
> > I have a difficult problem here and an idea how to solve it, which I
> > am not really sure of if it would be possible..
> >
> > I have an application running that sends out alarmings. these alarms
> > are appended to a plain-text-file. one alarm =3D=3D one line.
> >
> > I want to write an application that puts itself where the file is, and
> > recieves the appendings, writes them to another file and several other
> > things.
> >
> > I think this can maybe done by pipes, but I do not know how to do it.
> > an alarm should be treated like an event, when it occures something
> > has to be done about it (ring a bell :).
> >
> > of course this application would need to run as a service.
> > I also need some hints or tutorials here, to write a service.
> > (I usually program for unix systems but that's really different..)
> >
> > but first I need to get this append-problem solved.
> >
> > thanks in advance!
> >
> >
> > gruss
> > /Christian                   mailto:ca...@kr...
> >
> > --
> > I propose that the following character sequence for joke markers:
> >
> > :-)
> >                              19-Sep-82 11:44    Scott E  Fahlman
> >
> >
> >
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