void SetFile()
{
lock (_thisLock)
{
// Check directory
FileInfo file = new FileInfo(_filename);
_filename = file.FullName;
file = new FileInfo(_filename);
FileInfo dir = new FileInfo(file.Directory.FullName);
if (!dir.IsDirectory() || !dir.CanWrite())
{
throw new IOException("Cannot write log directory " + dir);
}
DateTime now = DateTime.Now;
if (_timeZoneInfo != null)
{
now = TimeZoneInfo.ConvertTime(now, _timeZoneInfo);
}
// Is this a rollover file?
string filename = file.Name;
int i = filename.ToLower().IndexOf(YYYY_MM_DD);
if (i >= 0)
{
file = new FileInfo(Path.Combine(dir.FullName,
filename.Substring(0, i) +
now.ToString(_fileDateFormat) +
filename.Substring(i + YYYY_MM_DD.Length)));
}
if (file.Exists && !file.CanWrite())
{
throw new IOException("Cannot write log file " + file);
}
// Do we need to change the output stream?
if (output == null || !file.Equals(_file))
{
// Yep
_file = file;
if (!_append && file.Exists)
{
file.MoveTo(new FileInfo(file.ToString() + "." + now.ToString(_fileBackupFormat)).FullName);
}
Stream oldOut = output;
output = new FileStream(
file.FullName, _append
? (FileMode.Append | FileMode.CreateNew)
: (FileMode.Truncate | FileMode.CreateNew),
FileAccess.Write);
if (oldOut != null)
{
oldOut.Close();
}
//if(log.isDebugEnabled())log.debug("Opened "+_file);
}
}
}
public void TestCanWrite()
{
FileInfo fi = new FileInfo("test.txt");
Assert.IsTrue(fi.CanWrite());
Assert.IsFalse(new FileInfo("C:\\Windows\\System32\\sethc.exe").CanWrite());
try
{
new FileInfo("C:\\Windows\\System32?\\sethc.exe").CanWrite();
Assert.Fail();
}
catch { }
}