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The READ and WRITE filters are intended to work
on any file descriptor, and the ident field contains the
descriptor number. These filters closely mirror the be-
havior of poll() or select(), in that they are intended to
return whenever there is data ready to read, or if the ap-
plication can write without blocking. The kernel func-
tion corresponding to the filter depends on the descriptor
type, so the implementation is tailored for the require-
ments of each type of descriptor in use. In general, the
amount of data that is ready to read (or able to be writ-
ten) will be returned in the data field within the...
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An Event-Condition-Action Logic Programming Language ?
