Initial Work on Backend Interface Management

internal/interfaces/interfaces.go

@@ -0,0 +1,47 @@
+package interfaces
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"os/exec"
+
+	"nfsense.net/nfsense/internal/definitions"
+)
+
+func GenerateInterfacesFile(conf definitions.Config) (string, error) {
+	buf := new(bytes.Buffer)
+	err := templates.ExecuteTemplate(buf, "interfaces.tmpl", conf)
+	if err != nil {
+		return "", fmt.Errorf("executing template: %w", err)
+	}
+	return buf.String(), nil
+}
+
+func ApplyInterfacesFile(content string) (string, error) {
+	f, err := os.Create("interfaces.conf")
+	if err != nil {
+		return "", fmt.Errorf("creating File: %w", err)
+	}
+
+	_, err = f.WriteString(content + "\n")
+	if err != nil {
+		return "", fmt.Errorf("writing File: %w", err)
+	}
+
+	err = f.Sync()
+	if err != nil {
+		return "", fmt.Errorf("syncing File: %w", err)
+	}
+
+	cmd := exec.Command("ifreload", "-a")
+
+	var out bytes.Buffer
+	cmd.Stdout = &out
+
+	err = cmd.Run()
+	if err != nil {
+		return "", fmt.Errorf("reloading Interfaces: %w", err)
+	}
+	return out.String(), nil
+}

internal/interfaces/template.go

@@ -0,0 +1,19 @@
+package interfaces
+
+import (
+	"embed"
+	"text/template"
+)
+
+//go:embed template
+var templateFS embed.FS
+var templates *template.Template
+
+func init() {
+
+	var err error
+	templates, err = template.New("").ParseFS(templateFS, "template/*.tmpl")
+	if err != nil {
+		panic(err)
+	}
+}