feat: Add proper device handling

README.md

@@ -7,4 +7,3 @@ Drop-in replacement for busybox init (kind of)
 ### TODO
 
 - askfirst handling
-- other devices than /dev/console

device.go

@@ -2,18 +2,17 @@ package main
 
 import (
 	"fmt"
-	"io"
 	"os"
 )
 
-var devices map[string]io.ReadWriteCloser
+var devices = map[string]*os.File{}
 
-func GetDevice(name string) (io.ReadWriteCloser, error) {
+func GetDevice(name string) (*os.File, error) {
 	if dev, ok := devices[name]; ok {
 		return dev, nil
 	}
 
-	dev, err := os.OpenFile("/dev/" + name, os.O_RDWR, 0644)
+	dev, err := os.OpenFile("/dev/"+name, os.O_RDWR, 0644)
 	if err != nil {
 		return nil, fmt.Errorf("open: %w", err)
 	}

process.go

@@ -11,10 +11,17 @@ func Spawn(entry InitTabEntry) (*exec.Cmd, error) {
 	cmdline := strings.Split(entry.Process, " ")
 	cmd := exec.Command(cmdline[0], cmdline[1:]...)
 
-	// TODO: add stdio handling
-	cmd.Stdin = os.Stdin
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
+	stdio := os.Stdout
+	if entry.Device != "" {
+		dev, err := GetDevice(entry.Device)
+		if err != nil {
+			return nil, fmt.Errorf("open device %s: %w", entry.Device, err)
+		}
+		stdio = dev
+	}
+	cmd.Stdin = stdio
+	cmd.Stdout = stdio
+	cmd.Stderr = stdio
 
 	err := cmd.Start()
 	if err != nil {