drop umask to 0 when writing files to disk

Author: nkubala

pkg/util/tar_utils.go

@@ -22,11 +22,16 @@ import (
 "os"
 "path/filepath"
 "strings"
+"syscall"
 
 "github.com/sirupsen/logrus"
 )
 
 func unpackTar(tr *tar.Reader, path string) error {
+// drop the umask temporarily to 0, so we can create all files with correct permissions
+// otherwise the default (022) will cause file permission inconsistencies
+oldMask := syscall.Umask(0)
+defer syscall.Umask(oldMask)
 for {
 header, err := tr.Next()
 if err == io.EOF {