| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | //go:build linux |
| 4 | |
| 5 | package systemdunits |
| 6 | |
| 7 | import ( |
| 8 | "context" |
| 9 | "fmt" |
| 10 | "strings" |
| 11 | "time" |
| 12 | |
| 13 | "github.com/coreos/go-systemd/v22/dbus" |
| 14 | ) |
| 15 | |
| 16 | // https://github.com/systemd/systemd/blob/3d320785c4bbba74459096b07e85a79c4f0cdffb/src/shared/install.c#L3785 |
| 17 | // see "is-enabled" in https://www.man7.org/linux/man-pages/man1/systemctl.1.html |
| 18 | var unitFileStates = []string{ |
| 19 | "enabled", |
| 20 | "enabled-runtime", |
| 21 | "linked", |
| 22 | "linked-runtime", |
| 23 | "alias", |
| 24 | "masked", |
| 25 | "masked-runtime", |
| 26 | "static", |
| 27 | "disabled", |
| 28 | "indirect", |
| 29 | "generated", |
| 30 | "transient", |
| 31 | "bad", |
| 32 | } |
| 33 | |
| 34 | func (c *Collector) collectUnitFiles(mx map[string]int64, conn systemdConnection) error { |
| 35 | if c.systemdVersion < 230 { |
| 36 | return nil |
| 37 | } |
| 38 | |
| 39 | if now := time.Now(); now.After(c.lastListUnitFilesTime.Add(c.CollectUnitFilesEvery.Duration())) { |
| 40 | unitFiles, err := c.getUnitFilesByPatterns(conn) |
| 41 | if err != nil { |
| 42 | return err |
| 43 | } |
| 44 | c.lastListUnitFilesTime = now |
| 45 | c.cachedUnitFiles = unitFiles |
| 46 | } |
| 47 | |
| 48 | seen := make(map[string]bool) |
| 49 | |
| 50 | for _, unitFile := range c.cachedUnitFiles { |
| 51 | seen[unitFile.Path] = true |
| 52 | |
| 53 | if !c.seenUnitFiles[unitFile.Path] { |
| 54 | c.seenUnitFiles[unitFile.Path] = true |
| 55 | c.addUnitFileCharts(unitFile.Path) |
| 56 | } |
| 57 | |
| 58 | px := fmt.Sprintf("unit_file_%s_state_", unitFile.Path) |
| 59 | for _, st := range unitFileStates { |
| 60 | mx[px+st] = 0 |
| 61 | } |
| 62 | mx[px+strings.ToLower(unitFile.Type)] = 1 |
| 63 | } |
| 64 | |
| 65 | for k := range c.seenUnitFiles { |
| 66 | if !seen[k] { |
| 67 | delete(c.seenUnitFiles, k) |
| 68 | c.removeUnitFileCharts(k) |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return nil |
| 73 | } |
| 74 | |
| 75 | func (c *Collector) getUnitFilesByPatterns(conn systemdConnection) ([]dbus.UnitFile, error) { |
| 76 | ctx, cancel := context.WithTimeout(context.Background(), c.Timeout.Duration()) |
| 77 | defer cancel() |
| 78 | |
| 79 | c.Debugf("calling function 'ListUnitFilesByPatterns'") |
| 80 | |
| 81 | unitFiles, err := conn.ListUnitFilesByPatternsContext(ctx, nil, c.IncludeUnitFiles) |
| 82 | if err != nil { |
| 83 | return nil, fmt.Errorf("error on ListUnitFilesByPatterns: %v", err) |
| 84 | } |
| 85 | |
| 86 | for i := range unitFiles { |
| 87 | unitFiles[i].Path = cleanUnitName(unitFiles[i].Path) |
| 88 | } |
| 89 | |
| 90 | c.Debugf("got %d unit files", len(unitFiles)) |
| 91 | |
| 92 | return unitFiles, nil |
| 93 | } |