public string GetCompleteRealPath(string path)
{
if (path == null)
{
return(null);
}
try
{
var realPath = path;
for (var links = 0; links < 32; links++)
{
var wasSymLink = TryFollowFirstSymbolicLink(ref realPath);
if (!wasSymLink)
{
return(realPath);
}
}
var ex = new UnixIOException(Errno.ELOOP);
_logger.Warn("Failed to check for symlinks in the path {0}: {1}", path, ex.Message);
return(path);
}
catch (Exception ex)
{
_logger.Debug(ex, "Failed to check for symlinks in the path {0}", path);
return(path);
}
}
public bool TryCreateRefLink(string srcPath, string linkPath)
{
if (!_supported)
{
return(false);
}
try
{
using (var srcHandle = NativeMethods.open(srcPath, OpenFlags.O_RDONLY))
{
if (srcHandle.IsInvalid)
{
_logger.Trace("Failed to create reflink at '{0}' to '{1}': Couldn't open source file", linkPath, srcPath);
return(false);
}
using (var linkHandle = NativeMethods.open(linkPath, OpenFlags.O_WRONLY | OpenFlags.O_CREAT | OpenFlags.O_TRUNC))
{
if (linkHandle.IsInvalid)
{
_logger.Trace("Failed to create reflink at '{0}' to '{1}': Couldn't create new link file", linkPath, srcPath);
return(false);
}
if (NativeMethods.clone_file(linkHandle, srcHandle) == -1)
{
var error = new UnixIOException();
linkHandle.Dispose();
Syscall.unlink(linkPath);
_logger.Trace("Failed to create reflink at '{0}' to '{1}': {2}", linkPath, srcPath, error.Message);
return(false);
}
_logger.Trace("Created reflink at '{0}' to '{1}'", linkPath, srcPath);
return(true);
}
}
}
catch (Exception ex)
{
Syscall.unlink(linkPath);
_logger.Trace(ex, "Failed to create reflink at '{0}' to '{1}'", linkPath, srcPath);
return(false);
}
}
