Checking if pipe is still open

Massacre · Post by **Massacre** » Wed Jan 21, 2004 5:43 am

Is there a way I can check whether the pipe to my java prog is still open?

Massacre · Post by **Massacre** » Wed Jan 21, 2004 6:48 am

Ok, i've fixed this now by doing the following check:

 [catch [pid $pipe]] != "0"

If it's != "0" then there was an err (eg, $pipe doesn't exist anymore) and I can restart the java prog.

Massacre · Post by **Massacre** » Wed Jan 21, 2004 6:53 am

hmmz, ok no i didn't, the problem still stands, cause catch is always returning 1.

Massacre · Post by **Massacre** » Wed Jan 21, 2004 9:43 am

Ha, ok, so it should be "pid $pipe" not [pid $pipe] and it works now but it still returns the PID even if the stream is closed, so does anyone know a working method please?

Ofloo · Post by **Ofloo** » Wed Jan 21, 2004 3:27 pm

what do u mean if a dcc is open or what ever maybe use

if {[info exists varname]}

stuff like that valididx ..? what is the open pipe ??

if its a file then use eof or something ..

Post by **user** » Wed Jan 21, 2004 3:39 pm

Massacre wrote:Is there a way I can check whether the pipe to my java prog is still open?

It will be "open" untill you 'close' it. I think what you want is 'eof'

Massacre · Post by **Massacre** » Thu Jan 22, 2004 7:48 am

I'm trying to test for the java prog exiting unexpetidly cause what happens is, the java prog dies then @ the next call to gets it's probably reading -1 or something and it hangs, cpu hits 100% and has to be killed. Is the only way round this to build my own gets proc and reload the java prog when im gettin -1 or whatever (EOF didn't work cause pipe was alive @ last call to gets).

Massacre · Post by **Massacre** » Thu Jan 22, 2004 8:17 am

Even on non-blocking mode it still hangs and uses 100% cpu when the java prog is dead

Post by **caesar** » Thu Jan 22, 2004 1:10 pm

Then you have an *infinite* loop that is not been closed.

stdragon · Post by **stdragon** » Thu Jan 22, 2004 1:32 pm

So the java program exits, it doesn't hang? Then what is using 100% cpu, eggdrop? That means you're doing something wrong, such as...

1. you have a loop with gets, but are using nonblocking mode
2. you have a loop with gets, in blocking mode, but aren't checking for eof
3. you have fconfigured events with nonblocking mode, but never close the pipe

That's to start with anyway. It's really impossible to say without you posting at least some of your code. Also, try adding debugging info (to eggdrop, and your java program).

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Checking if pipe is still open

Checking if pipe is still open

Re: Checking if pipe is still open