How to handle a "wait for file" situation

Richard Miller wow at
Tue Jun 9 09:16:34 CDT 2009

Not sure of the best way to handle this.

I have a script that gets to a point in its processing where it needs to 
wait up to 18 seconds for the appearance of a file. I know I can use a 
simple "repeat until there is a file xxx" type of loop (exiting from the 
loop if the time exceeds 18 seconds), but I'm thinking there's a better 
way to handle this. This script is running on a cgi server and there 
could be numerous simultaneous scripts doing the same thing... so I want 
to minimize the load on the CPU.


Richard Miller

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