36 lines
664 B
Go
36 lines
664 B
Go
// Accounting and limiting reader
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// Unix specific functions.
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// +build darwin dragonfly freebsd linux netbsd openbsd
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package fs
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import (
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"os"
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"os/signal"
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"syscall"
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)
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// startSignalHandler() sets a signal handler to catch SIGUSR2 and toggle throttling.
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func startSignalHandler() {
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// Don't do anything if no bandwidth limits requested.
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if bwLimit <= 0 {
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return
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}
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, syscall.SIGUSR2)
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go func() {
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// This runs forever, but blocks until the signal is received.
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for {
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<-signals
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if tokenBucket == nil {
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tokenBucket = origTokenBucket
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} else {
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tokenBucket = nil
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}
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}
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}()
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}
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