A.P. Lawrence

Watching a file

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From - Mon Feb 21 07:12:47 2000
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Date: Mon, 21 Feb 2000 07:12:16 -0500
From: Tony Lawrence <tony@aplawrence.com>
Organization: A.P. Lawrence
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To: "fuzzy@tampabay.rr.com" <fuzzy@tampabay.rr.com>
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jmt wrote:
> 
> Hey Tony,
> 
> Actually, this will work out very well. I only need to watch 1 file in 1
> directory. What is going to happen, another running application on the same
> SCO box will be generating a print file. Once I see that print file, I'll
> send it (TCP/IP) to a WinNT box for processing. Yea, your going to ask me
> why can't that other app send it? The client doesn't want to be involved in
> writing any code to send the file to our WinNT Box. Now after the WinNT box
> processess the print file by adding extra things on it, etc.. the WinNT box
> will send it back to me than I will print it out.

That will work fine as long as you know when the sending
part is done.  However, you may not even need to go to that
complexity.  If the client prints to a named pipe and sends
its output there, a simple shell script will do what you
want.  Try this:

mknod /tmp/np p

cat > /tmp/myprog
while true
 do
 while read line
  do
   echo $line 
  done >> /tmp/myfile$$
 cat /tmp/myfile$$
 done
<CTRL-D>
chmod 755 /tmp/myprog
/tmp/myprg < /tmp/np

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Now, from some other screen, cp files to /tmp/np.  All this
requires is that the client closes the file when its done
printing.

-- 
Tony Lawrence (tony@aplawrence.com)
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