Hi everyone,

I was hoping some of you might be able to give me a bit of advice on a coding problem I've been battling with for the last while.

I have been given a program which I run as root:

# ./prog pipe1 &

An argument of the program was a named pipe that I had earlier created with:

$ mknod pipe1 p

From the command line, to get the program to do it's stuff, I do the following:

$ echo "DO SOMETHING" > pipe

When I do this, the program functions perfectly and does as expected.

In a thread of a program that I am writing in Java, I need to send this string to the pipe that the program is using.

I have tried everything that I can think of - running the above command as a new process from within Java, creating a PrintWriter to write to the pipe as if it were a file and many others.

Would anyone have any thoughts on the way to 'echo' information into this pipe?

All advice will be much appreciated.

Thanks,
7th

P.S.

I hope I have explained the problem well. Any questions, please don't hesitate to ask

Hi -

There's really no "magic":

1. On Linux, you want to use the "mkfifo" command (not "mknod")

2. To write to it from Java, just open some kind of OutputStream to that filename (exactly as you would, for example, open a text file).

3. That's it!

Here's a link that might give some more info:
http://developers.sun.com/solaris/ar...med_pipes.html

'Hope that helps .. PSM

mknod pipe p works (or should work) the same way as mkfifo pipe