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sytemd magics

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This commit is contained in:
pavel 2026-05-14 20:04:05 +02:00
commit 4e6ad3cd26
3 changed files with 72 additions and 12 deletions
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81
internal/app/systemd_service.go
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@ -81,8 +81,8 @@ WantedBy=default.target
if err := os.WriteFile(servicePath, []byte(unit), 0o644); err != nil {
return err
}
_ = runCmd("sudo", "-n", "-u", p.UnixUser, "systemctl", "--user", "daemon-reload")
_ = runCmd("sudo", "-n", "-u", p.UnixUser, "systemctl", "--user", "enable", "--now", p.ServiceName)
_ = runSystemctlUser(p.UnixUser, "daemon-reload")
_ = runSystemctlUser(p.UnixUser, "enable", "--now", p.ServiceName)
return nil
}
@ -97,6 +97,59 @@ func homeForUnixUser(username string) (string, error) {
return u.HomeDir, nil
}
func userRuntimeEnv(username string) (string, string, error) {
u, err := user.Lookup(username)
if err != nil {
return "", "", fmt.Errorf("lookup unix user %q failed: %w", username, err)
}
runtimeDir := filepath.Join("/run/user", u.Uid)
busAddr := "unix:path=" + filepath.Join(runtimeDir, "bus")
return runtimeDir, busAddr, nil
}
func runSystemctlUser(username string, args ...string) error {
if err := ensureLingerEnabled(username); err != nil {
return err
}
runtimeDir, busAddr, err := userRuntimeEnv(username)
if err != nil {
return err
}
cmdArgs := []string{
"-n", "-u", username,
"env",
"XDG_RUNTIME_DIR=" + runtimeDir,
"DBUS_SESSION_BUS_ADDRESS=" + busAddr,
"systemctl", "--user",
}
cmdArgs = append(cmdArgs, args...)
return runCmd("sudo", cmdArgs...)
}
func runJournalctlUser(username string, args ...string) (string, error) {
if err := ensureLingerEnabled(username); err != nil {
return "", err
}
runtimeDir, busAddr, err := userRuntimeEnv(username)
if err != nil {
return "", err
}
cmdArgs := []string{
"-n", "-u", username,
"env",
"XDG_RUNTIME_DIR=" + runtimeDir,
"DBUS_SESSION_BUS_ADDRESS=" + busAddr,
"journalctl", "--user",
}
cmdArgs = append(cmdArgs, args...)
return runCmdOut("sudo", cmdArgs...)
}
func ensureLingerEnabled(username string) error {
// Idempotent; safe to call repeatedly.
return runCmd("sudo", "loginctl", "enable-linger", username)
}
type ServiceStatus struct {
Unit string `json:"unit"`
ActiveState string `json:"active_state"`
@ -108,11 +161,20 @@ type ServiceStatus struct {
}
func (a *App) getServiceStatus(p Project) (ServiceStatus, error) {
out, err := runCmdOut(
"sudo", "-n", "-u", p.UnixUser,
"systemctl", "--user", "show", p.ServiceName, "--no-pager",
"--property=ActiveState,SubState,MainPID,ExecMainStatus,Result,FragmentPath",
)
out, err := func() (string, error) {
runtimeDir, busAddr, err := userRuntimeEnv(p.UnixUser)
if err != nil {
return "", err
}
return runCmdOut(
"sudo", "-n", "-u", p.UnixUser,
"env",
"XDG_RUNTIME_DIR="+runtimeDir,
"DBUS_SESSION_BUS_ADDRESS="+busAddr,
"systemctl", "--user", "show", p.ServiceName, "--no-pager",
"--property=ActiveState,SubState,MainPID,ExecMainStatus,Result,FragmentPath",
)
}()
if err != nil {
return ServiceStatus{}, err
}
@ -142,8 +204,5 @@ func (a *App) getServiceStatus(p Project) (ServiceStatus, error) {
}
func (a *App) getServiceLogs(p Project, lines int) (string, error) {
return runCmdOut(
"sudo", "-n", "-u", p.UnixUser,
"journalctl", "--user", "-u", p.ServiceName, "--no-pager", "-n", strconv.Itoa(lines), "-o", "short-iso",
)
return runJournalctlUser(p.UnixUser, "-u", p.ServiceName, "--no-pager", "-n", strconv.Itoa(lines), "-o", "short-iso")
}