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package dbus
import (
"errors"
"os"
"os/exec"
"strings"
"sync"
)
// Proxy holds references to a xdg-dbus-proxy process, and should never be copied.
// Once sealed, configuration changes will no longer be possible and attempting to do so will result in a panic.
type Proxy struct {
cmd *exec.Cmd
statP [2]*os.File
argsP [2]*os.File
path string
session [2]string
system [2]string
wait *chan error
read *chan error
ready *chan bool
seal *string
lock sync.RWMutex
}
func (p *Proxy) String() string {
if p == nil {
return "(invalid dbus proxy)"
}
p.lock.RLock()
defer p.lock.RUnlock()
if p.cmd != nil {
return p.cmd.String()
}
if p.seal != nil {
return *p.seal
}
return "(unsealed dbus proxy)"
}
// Seal seals the Proxy instance.
func (p *Proxy) Seal(session, system *Config) error {
p.lock.Lock()
defer p.lock.Unlock()
if p.seal != nil {
panic("dbus proxy sealed twice")
}
if session == nil && system == nil {
return errors.New("no configuration to seal")
}
seal := strings.Builder{}
if session != nil {
if err := session.buildSeal(&seal, p.session); err != nil {
return err
}
}
if system != nil {
if err := system.buildSeal(&seal, p.system); err != nil {
return err
}
}
v := seal.String()
p.seal = &v
return nil
}
// New returns a reference to a new unsealed Proxy.
func New(binPath string, session, system [2]string) *Proxy {
return &Proxy{path: binPath, session: session, system: system}
}
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