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//go:build linux && cgo
package endpoints
import (
"net"
"path/filepath"
)
// Create a new net.Listener bound to the unix socket of the devIncus endpoint.
func createDevIncuslListener(dir string) (net.Listener, error) {
path := filepath.Join(dir, "guestapi", "sock")
// If this socket exists, that means a previous daemon died and
// didn't clean up. We assume that such a daemon is actually dead
// if we get this far, since localCreateListener() tries to connect to
// the actual socket to make sure that it is actually dead. So, it
// is safe to remove it here without any checks.
//
// Also, it would be nice to SO_REUSEADDR here so we don't have to
// delete the socket, but we can't:
// http://stackoverflow.com/questions/15716302/so-reuseaddr-and-af-unix
//
// Note that this will force clients to reconnect on restart.
err := socketUnixRemoveStale(path)
if err != nil {
return nil, err
}
listener, err := socketUnixListen(path)
if err != nil {
return nil, err
}
err = socketUnixSetPermissions(path, 0o666)
if err != nil {
_ = listener.Close()
return nil, err
}
return listener, nil
}
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