Tronax
d56659e21a
Initial Go project built with Bubble Tea and Lip Gloss: - Live preview and management of /etc/update-motd.d scripts - Embedded presets (ubuntu-default, minimal, server-dashboard) - Bundled POSIX sh style scripts (brand header, sysinfo panel, footer) - Snapshot/restore safety around applying changes - CLI subcommands preview, apply, restore, list-presets - Unit tests for detect, sanitize, and apply logic
74 lines
2 KiB
Go
74 lines
2 KiB
Go
package motd
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import (
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"os"
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"path/filepath"
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"strings"
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)
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// HostInfo beschreibt den erkannten MOTD-Zustand des Systems.
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type HostInfo struct {
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Hostname string
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Distro string // PRETTY_NAME aus /etc/os-release
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PAM bool // pam_motd konfiguriert (dynamischer MOTD aktiv)
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PAMWhere []string // Dateien in /etc/pam.d mit pam_motd-Eintrag
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DynamicPath string // vorhandene Cache-Datei der dynamischen MOTD ("" = keine)
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StaticMOTD bool // /etc/motd vorhanden und nicht leer
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}
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// DetectHost sammelt Host- und MOTD-Informationen unter root.
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// Fehler einzelner Erkennungen führen nicht zum Abbruch.
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func DetectHost(root string) HostInfo {
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info := HostInfo{Hostname: "unbekannt", Distro: "unbekannt"}
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if h, err := os.Hostname(); err == nil && h != "" {
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info.Hostname = strings.SplitN(h, ".", 2)[0]
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}
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if pretty, ok := osReleaseValue(filepath.Join(root, "etc", "os-release"), "PRETTY_NAME"); ok {
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info.Distro = pretty
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}
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for _, svc := range []string{"sshd", "login", "remote"} {
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b, err := os.ReadFile(filepath.Join(root, "etc", "pam.d", svc))
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if err != nil {
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continue
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}
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for _, line := range strings.Split(string(b), "\n") {
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line = strings.TrimSpace(line)
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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if strings.Contains(line, "pam_motd") {
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info.PAM = true
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info.PAMWhere = append(info.PAMWhere, svc)
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break
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}
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}
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}
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for _, cand := range []string{"run/motd.dynamic", "run/motd"} {
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p := filepath.Join(root, cand)
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if fi, err := os.Stat(p); err == nil && !fi.IsDir() && fi.Size() > 0 {
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info.DynamicPath = p
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break
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}
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}
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if fi, err := os.Stat(filepath.Join(root, "etc", "motd")); err == nil && !fi.IsDir() && fi.Size() > 0 {
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info.StaticMOTD = true
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}
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return info
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}
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func osReleaseValue(path, key string) (string, bool) {
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b, err := os.ReadFile(path)
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if err != nil {
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return "", false
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}
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for _, line := range strings.Split(string(b), "\n") {
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if v, ok := strings.CutPrefix(strings.TrimSpace(line), key+"="); ok {
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return strings.Trim(v, `"'`), true
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}
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}
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return "", false
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}
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