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// +build !windows
package bind
import (
"os"
"syscall"
)
const systemdMinFd = 3
var systemdNumFds int
// Unfortunately this can't be a normal init function, because their execution
// order is undefined, and we need to run before the init() in bind.go.
func systemdInit() {
pid, err := envInt("LISTEN_PID")
if err != nil || pid != os.Getpid() {
return
}
systemdNumFds, err = envInt("LISTEN_FDS")
if err != nil {
systemdNumFds = 0
return
}
// Prevent fds from leaking to our children
for i := 0; i < systemdNumFds; i++ {
syscall.CloseOnExec(systemdMinFd + i)
}
}
func usingSystemd() bool {
return systemdNumFds > 0
}
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