/dev/vcs - poll for changes?

[Phil Endecott]

Dear Experts,

Is there a way to detect when the content of a /dev/vcs* has changed?  
I have some code that currently polls, which is obviously sub-optimal.  
I was hoping that there would be some trick like look at the 
modification time, but I haven't found anything.  If this isn't 
currently possible, how easily could it be added?  What would the 
preferred API be, if it were added?

Thanks for any suggestions.

Phil.



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