X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=cmd%2Fsafcm-remote%2Fsync%2Fservices_systemd.go;fp=cmd%2Fsafcm-remote%2Fsync%2Fservices_systemd.go;h=68bbc7d3e08c07e1e665e2cc7ac175d25a1e7679;hb=f2f2bc47e8729548f3c10117f7f008b547c4afc5;hp=0000000000000000000000000000000000000000;hpb=dc0d431a778a50e6732b9eb91384a07a207b772d;p=safcm%2Fsafcm.git

diff --git a/cmd/safcm-remote/sync/services_systemd.go b/cmd/safcm-remote/sync/services_systemd.go
new file mode 100644
index 0000000..68bbc7d
--- /dev/null
+++ b/cmd/safcm-remote/sync/services_systemd.go
@@ -0,0 +1,157 @@
+// MsgSyncReq: enable and start services on the remote host (systemd)
+
+// Copyright (C) 2021  Simon Ruderich
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package sync
+
+import (
+	"fmt"
+	"strings"
+
+	"ruderich.org/simon/safcm"
+)
+
+func (s *Sync) syncServicesSystemd() error {
+	s.log.Debugf("services: detected systemd")
+
+	s.log.Debugf("services: checking %s",
+		strings.Join(s.req.Services, " "))
+	services, err := s.systemdServiceState(s.req.Services)
+	if err != nil {
+		return err
+	}
+
+	var start, enable []string
+	for _, name := range s.req.Services {
+		var change safcm.ServiceChange
+
+		x := services[name]
+		if x.ActiveState != "active" {
+			start = append(start, name)
+			change.Started = true
+		}
+		if x.UnitFileState != "enabled" {
+			enable = append(enable, name)
+			change.Enabled = true
+		}
+
+		if change.Started || change.Enabled {
+			change.Name = name
+			s.resp.ServiceChanges = append(s.resp.ServiceChanges,
+				change)
+		}
+	}
+	if len(start) == 0 && len(enable) == 0 {
+		return nil
+	}
+
+	if s.req.DryRun {
+		return nil
+	}
+
+	// Reload service files which were possibly changed during file sync
+	// or package installation
+	_, _, err = s.cmd.Run("services", "/bin/systemctl", "daemon-reload")
+	if err != nil {
+		return err
+	}
+	if len(start) != 0 {
+		s.log.Verbosef("services: starting %s",
+			strings.Join(start, " "))
+		_, _, err := s.cmd.Run("services", append([]string{
+			"/bin/systemctl", "start", "--",
+		}, start...)...)
+		if err != nil {
+			return err
+		}
+	}
+	if len(enable) != 0 {
+		s.log.Verbosef("services: enabling %s",
+			strings.Join(enable, " "))
+		_, _, err := s.cmd.Run("services", append([]string{
+			"/bin/systemctl", "enable", "--",
+		}, enable...)...)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+type SystemdService struct {
+	ActiveState   string
+	UnitFileState string
+}
+
+func (s *Sync) systemdServiceState(services []string) (
+	map[string]SystemdService, error) {
+
+	out, _, err := s.cmd.Run("services", append([]string{
+		"/bin/systemctl",
+		"show",
+		"--property=ActiveState,UnitFileState,LoadError",
+		"--",
+	}, services...)...)
+	if err != nil {
+		return nil, err
+	}
+
+	i := 0
+
+	res := make(map[string]SystemdService)
+	for _, block := range strings.Split(string(out), "\n\n") {
+		lines := strings.Split(strings.TrimSpace(block), "\n")
+		if len(lines) != 3 {
+			return nil, fmt.Errorf("invalid systemctl output: %q",
+				block)
+		}
+
+		var service SystemdService
+		for _, x := range lines {
+			const (
+				activePrefix = "ActiveState="
+				unitPrefix   = "UnitFileState="
+				errorPrefix  = "LoadError="
+			)
+
+			if strings.HasPrefix(x, activePrefix) {
+				service.ActiveState = strings.TrimPrefix(x,
+					activePrefix)
+			} else if strings.HasPrefix(x, unitPrefix) {
+				service.UnitFileState = strings.TrimPrefix(x,
+					unitPrefix)
+			} else if strings.HasPrefix(x, errorPrefix) {
+				x := strings.TrimPrefix(x, errorPrefix)
+				// Older systemd versions (e.g. 237) add empty
+				// quotes even if there is no error
+				if x != "" && x != ` ""` {
+					return nil, fmt.Errorf(
+						"systemd unit %q not found",
+						services[i])
+				}
+			} else {
+				return nil, fmt.Errorf(
+					"invalid systemctl show line %q", x)
+			}
+		}
+		res[services[i]] = service
+
+		i++
+	}
+
+	return res, nil
+}