60 lines
740 B
Go
60 lines
740 B
Go
package config
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import (
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"log"
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"os"
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"sync"
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"time"
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)
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type HostnameCache struct {
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name string
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sync.RWMutex
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}
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var Hostname *HostnameCache
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func (c *HostnameCache) Get() string {
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c.RLock()
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n := c.name
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c.RUnlock()
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return n
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}
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func (c *HostnameCache) Set(name string) {
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if name == c.Get() {
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return
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}
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c.Lock()
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c.name = name
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c.Unlock()
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}
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func InitHostname() error {
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hostname, err := os.Hostname()
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if err != nil {
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return err
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}
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Hostname = &HostnameCache{
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name: hostname,
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}
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go Hostname.update()
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return nil
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}
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func (c *HostnameCache) update() {
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for {
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time.Sleep(time.Second)
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name, err := os.Hostname()
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if err != nil {
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log.Println("E! failed to get hostname:", err)
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} else {
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Hostname.Set(name)
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}
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}
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}
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