File.Move does not inherit permissions from target directory?
- by Joseph Kingry
In case something goes wrong in creating a file, I've been writing to a temporary file and then moving to the destination. Something like:
var destination = @"C:\foo\bar.txt";
var tempFile = Path.GetTempFileName();
using (var stream = File.OpenWrite(tempFile))
{
// write to file here here
}
string backupFile = null;
try
{
var dir = Path.GetDirectoryName(destination);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
Util.SetPermissions(dir);
}
if (File.Exists(destination))
{
backupFile = Path.Combine(Path.GetTempPath(), new Guid().ToString());
File.Move(destination, backupFile);
}
File.Move(tempFile, destination);
if (backupFile != null)
{
File.Delete(backupFile);
}
}
catch(IOException)
{
if(backupFile != null && !File.Exists(destination) && File.Exists(backupFile))
{
File.Move(backupFile, destination);
}
}
The problem is that the new "bar.txt" in this case does not inherit permissions from the "C:\foo" directory. Yet if I create a file via explorer/notepad etc directly in the "C:\foo" there's no issues, so I believe the permissions are correctly set on "C:\foo".
Update
Found Inherited permissions are not automatically updated when you move folders, maybe it applies to folders as well. Now looking for a way to force an update of file permissions. Is there a better way overall of doing this?
