Now program must try to run as a user set in a config file.

init loggers from new config options.

cmd/dwelling-upload/main.go

@@ -10,6 +10,8 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
+	"os/user"
+	"strconv"
 	"syscall"
 )
 
@@ -23,19 +25,36 @@ func main() {
 		log.Fatalln(err)
 	}
 
-	logErr, err := logging.NewLogger(config.LogDir + "/error.log")
+	// Substitute user to the one in config
+	dwu, err := user.Lookup(config.User)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	dwuid, err := strconv.Atoi(dwu.Uid)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	if os.Getuid() != dwuid {
+		if err := syscall.Setuid(dwuid); err != nil {
+			log.Fatalln(err)
+		}
+	}
+
+	logErr, err := logging.NewLogger(config.Log.Error)
 	if err != nil {
 		log.Fatalln("failed to open error logger:", err)
 	}
 	defer logErr.Close()
 
-	logUpload, err := logging.NewLogger(config.LogDir + "/upload.log")
+	logUpload, err := logging.NewLogger(config.Log.Upload)
 	if err != nil {
 		log.Fatalln("failed to open upload logger:", err)
 	}
 	defer logUpload.Close()
 
-	logDownload, err := logging.NewLogger(config.LogDir + "/download.log")
+	logDownload, err := logging.NewLogger(config.Log.Download)
 	if err != nil {
 		log.Fatalln("failed to open download logger:", err)
 	}