Missing read permission for Zip files created with .net core on Linux

Question

DotNetZip creates zip files with permission 000 (no read, no write, no execute) and thus I cannot easily open them on Linux (Windows Explorer doesn't care about it and opens the file normally). Same code on Windows produces files with read permission (on Linux):

using (var fs = new System.IO.FileStream("./test.zip"))
{
  using (var archive = new System.IO.Compression.ZipArchive(fs, ZipArchiveMode.Create))
  {
    var entry = archive.CreateEntry("test.txt");
    using (var writer = new System.IO.StreamWriter(entry.Open()))
    {
      writer.Write("Hello World");
    }
  }
}

Can I either set the permissions or emulating that System.IO.Compression is running on Windows?

Does this answer your question? [DotNetZip: creating zip with C# permissions issue](https://stackoverflow.com/questions/606908/dotnetzip-creating-zip-with-c-sharp-permissions-issue) — panoskarajohn, Dec 12 '19 at 15:20
Try using this to change the file permissions after the file is created https://stackoverflow.com/questions/45132081/file-permissions-on-linux-unix-with-net-core — Ryan Gaudion, Dec 12 '19 at 15:21

score 7 · Accepted Answer · answered Jun 09 '20 at 21:39

.net core now exposes the ExternalAttributes property of ZipArchiveEntry that allows you to set permissions, like this (664):

entry.ExternalAttributes = entry.ExternalAttributes | (Convert.ToInt32("664", 8) << 16);

note that the string is an octal representation of the permission bit mask, therefore the convert to base 8.

Missing read permission for Zip files created with .net core on Linux

1 Answers1