Scripts/WriteNFSv3ExtendedGroupsLog.ps1
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function Write-NFSv3ExtendedGroupsLog { param ( [string]$Message, [string]$LogLevel = "INFO", [string]$LogFile = $Global:NFSv3ExtendedGroupsLogFile, [Parameter(Mandatory = $false)] [ValidateSet('SilentlyContinue', 'Continue', 'Inquire', 'Stop', 'Suspend')] [string]$VerbosePreference ) $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss.fff" $logEntry = "[$timestamp] [$PID] [$LogLevel] $Message" if ($LogLevel -eq "ERROR") { Write-Error $Message } elseif ($LogLevel -eq "WARNING") { Write-Warning $Message } if ($VerbosePreference -eq 'Continue') { Write-Verbose $Message } # Take lock on the file so that only one process can update it at time. $mutex = New-Object System.Threading.Mutex $false, "Global\MyLogMutex" $retryInterval = 500 $maxRetry = 5 $retryCount = 0 $isSuccess = $false try { # Wait indefinitely to acquire the mutex. $mutex.WaitOne() | Out-Null while ($isSuccess -eq $false -and $retryCount -le $maxRetry) { try { # Open the file with exclusive access (file locking) using FileShare::None. $fileStream = [System.IO.File]::Open($LogFile, [System.IO.FileMode]::Append, [System.IO.FileAccess]::Write, [System.IO.FileShare]::None) # Use a StreamWriter to write the log entry. $writer = New-Object System.IO.StreamWriter($fileStream) $writer.WriteLine("$logEntry") $writer.Flush() # Close the StreamWriter and the FileStream. $writer.Close() $fileStream.Close() $isSuccess = $true } catch { # Increase retryCount and wait for 0.5 seconds to again open file. Write-Warning "$_, retrying..." $retryCount += 1 Start-Sleep -Milliseconds $retryInterval } } # Release mutex once log has been written to file. $mutex.ReleaseMutex() | Out-Null } catch { Write-Error "Error while writing logs: $_" } finally { $mutex.Dispose() | Out-Null } } |