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// +build linux
package cli
import (
"fmt"
sddbus "github.com/coreos/go-systemd/dbus"
sdunit "github.com/coreos/go-systemd/unit"
"github.com/hlandau/acmetool/interaction"
"gopkg.in/hlandau/svcutils.v1/exepath"
"gopkg.in/hlandau/svcutils.v1/systemd" // coreos/go-systemd/util requires cgo
"io"
"os"
)
func promptSystemd() {
if !systemd.IsRunningSystemd() {
log.Debugf("not running systemd")
return
}
log.Debug("connecting to systemd")
conn, err := sddbus.New()
if err != nil {
log.Errore(err, "connect to systemd")
return
}
defer conn.Close()
log.Debug("connected")
props, err := conn.GetUnitProperties("acmetool-redirector.service")
if err != nil {
log.Errore(err, "systemd GetUnitProperties")
return
}
if props["LoadState"].(string) != "not-found" {
log.Info("acmetool-redirector.service unit already installed, skipping")
return
}
r, err := interaction.Auto.Prompt(&interaction.Challenge{
Title: "Install Redirector as systemd Service?",
Body: `Would you like acmetool to automatically install the redirector as a systemd service?
The service name will be acmetool-redirector.`,
ResponseType: interaction.RTYesNo,
UniqueID: "acmetool-quickstart-install-redirector-systemd",
})
log.Fatale(err, "interaction")
if r.Cancelled {
return
}
username, err := determineAppropriateUsername()
if err != nil {
log.Errore(err, "determine appropriate username")
return
}
f, err := os.OpenFile("/etc/systemd/system/acmetool-redirector.service", os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0644)
if err != nil {
log.Errore(err, "acmetool-redirector.service unit file already exists?")
return
}
defer f.Close()
rdr := sdunit.Serialize([]*sdunit.UnitOption{
sdunit.NewUnitOption("Unit", "Description", "acmetool HTTP redirector"),
sdunit.NewUnitOption("Service", "Type", "notify"),
sdunit.NewUnitOption("Service", "ExecStart", exepath.Abs+` redirector --service.uid=`+username),
sdunit.NewUnitOption("Service", "Restart", "always"),
sdunit.NewUnitOption("Service", "RestartSec", "30"),
sdunit.NewUnitOption("Install", "WantedBy", "multi-user.target"),
})
_, err = io.Copy(f, rdr)
if err != nil {
log.Errore(err, "cannot write unit file")
return
}
f.Close()
err = conn.Reload() // softfail
log.Warne(err, "systemctl daemon-reload failed")
_, _, err = conn.EnableUnitFiles([]string{"acmetool-redirector.service"}, false, false)
log.Errore(err, "failed to enable unit acmetool-redirector.service")
_, err = conn.StartUnit("acmetool-redirector.service", "replace", nil)
log.Errore(err, "failed to start acmetool-redirector")
resultStr := "The acmetool-redirector service was successfully started."
if err != nil {
resultStr = "The acmetool-redirector service WAS NOT successfully started. You may have a web server listening on port 80. You will need to troubleshoot this yourself."
}
_, err = interaction.Auto.Prompt(&interaction.Challenge{
Title: "systemd Service Installation Complete",
Body: fmt.Sprintf(`acmetool-redirector has been installed as a systemd service.
%s`, resultStr),
UniqueID: "acmetool-quickstart-complete",
})
log.Errore(err, "interaction")
}
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