function Tail-Content([string[]] $Path,[int] $Last = 10,[string]$Newline=[Environment]::NewLine)
{
$fs = $null
$resolvedPaths = $Path
foreach ($rpath in $resolvedPaths)
{
$numLines = $Last
$seekOffset = -1;
$PathIntrinsics = $ExecutionContext.SessionState.Path
if ($PathIntrinsics.IsProviderQualified($rpath))
{
$rpath = $PathIntrinsics.GetUnresolvedProviderPathFromPSPath($rpath)
}
Write-Verbose "Tail-Content processing $rpath"
$lines = New-Object 'System.Collections.Generic.List`1[System.String]'
$line = New-Object "System.Text.StringBuilder"
$newlineIndex = $Newline.Length - 1
$fs = New-Object "System.IO.FileStream" $rpath,"Open","Read"
while ($numLines -gt 0 -and ($fs.Length + $seekOffset -ge 0))
{
[void]$fs.Seek($seekOffset--, "End")
$ch = $fs.ReadByte()
if ($ch -eq 0 -or $ch -gt 127)
{
#throw "Tail-Content only works on ASCII encoded files"
}
# Chew up line termination characters
if ($ch -eq $Newline[$newlineIndex])
{
if (--$newlineIndex -lt 0)
{
$newlineIndex = $Newline.Length - 1
# Ignore the newline at the end of the file
if ($seekOffset -lt -($Newline.Length + 1))
{
$lines.Insert(0, $line.ToString())
$line = New-Object "System.Text.StringBuilder"
$numLines--
}
}
continue
}
[void]$line.Insert(0, [char]$ch)
}
if ($line.Length -gt 0)
{
$lines.Insert(0, $line.ToString())
}
$lines
if ($fs) { $fs.Close() }
}
}
cls
cd "FileSystem::C:\archived\self\task\powershell\test"
$file ="FileSystem::C:\archived\self\task\powershell\test\OtherEnconding.txt"
#$file ="984MB.txt"
Tail-Content $file
