functions/Get-DbaStartupParameter.ps1

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Function Get-DbaStartupParameter
{
<#
.SYNOPSIS
Displays values for a detailed list of SQL Server Startup Parameters.
 
.DESCRIPTION
Displays values for a detailed list of SQL Server Startup Parameters including Master Data Path, Master Log path, Error Log, Trace Flags, Parameter String and much more.
 
This command relies on remote Windows Server (SQL WMI/WinRm) access. You can pass alternative Windows credentials by using the -Credential parameter.
  
See https://msdn.microsoft.com/en-us/library/ms190737.aspx for more information.
  
.PARAMETER SqlServer
The SQL Server that you're connecting to.
 
.PARAMETER Credential
Credential object used to connect to the Windows Server as a different Windows user.
  
.PARAMETER Simple
Shows a simplified output including only Server, Master Data Path, Master Log path, ErrorLog, TraceFlags and ParameterString
 
.NOTES
dbatools PowerShell module (https://dbatools.io)
Copyright (C) 2016 Chrissy LeMaire
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
 
.LINK
 https://dbatools.io/Get-DbaStartupParameter
 
.EXAMPLE
Get-DbaStartupParameter -SqlServer sql2014
 
Logs into SQL WMI as the current user then displays the values for numerous startup parameters.
 
.EXAMPLE
$wincred = Get-Credential ad\sqladmin
Get-DbaStartupParameter -SqlServer sql2014 -Credential $wincred -Simple
 
Logs in to WMI using the ad\sqladmin credential and gathers simplified information about the SQL Server Startup Parameters.
  
#>

[CmdletBinding()]
param ([parameter(ValueFromPipeline, Mandatory = $true)]
[Alias("ServerInstance", "SqlInstance")]
[object[]]$SqlServer,
[Alias("SqlCredential")]
[PSCredential]$Credential,
[switch]$Simple
)

PROCESS
{
foreach ($servername in $SqlServer)
{
$servercount++
try
{
$instancename = ($servername.Split('\'))[1]
Write-Verbose "Attempting to connect to $servername"

if ($instancename.Length -eq 0) { $instancename = "MSSQLSERVER" }

$displayname = "SQL Server ($instancename)"

$Scriptblock = {
$servername = $args[0]
$displayname = $args[1]

$wmisvc = $wmi.Services | Where-Object { $_.DisplayName -eq $displayname }

$params = $wmisvc.StartupParameters -split ';'

$masterdata = $params | Where-Object { $_.StartsWith('-d') }
$masterlog = $params | Where-Object { $_.StartsWith('-l') }
$errorlog = $params | Where-Object { $_.StartsWith('-e') }
$traceflags = $params | Where-Object { $_.StartsWith('-T') }

$debugflag = $params | Where-Object { $_.StartsWith('-t') }

if ($debugflag.length -ne 0)
{
Write-Warning "$servername is using the lowercase -t trace flag. This is for internal debugging only. Please ensure this was intentional."
}

if ($traceflags.length -eq 0)
{
$traceflags = "None"
}

if ($Simple -eq $true)
{
[PSCustomObject]@{
Server = $Servername
MasterData = $masterdata.TrimStart('-d')
MasterLog = $masterlog.TrimStart('-l')
ErrorLog = $errorlog.TrimStart('-e')
TraceFlags = $traceflags -join ','
ParameterString = $wmisvc.StartupParameters
}
}
else
{
# From https://msdn.microsoft.com/en-us/library/ms190737.aspx

$commandpromptparm = $params | Where-Object { $_ -eq '-c' }
$minimalstartparm = $params | Where-Object { $_ -eq '-f' }
$memorytoreserve = $params | Where-Object { $_.StartsWith('-g') }
$noeventlogsparm = $params | Where-Object { $_ -eq '-n' }
$instancestartparm = $params | Where-Object { $_ -eq '-s' }
$disablemonitoringparm = $params | Where-Object { $_ -eq '-x' }
$increasedextentsparm = $params | Where-Object { $_ -ceq '-E' }

$minimalstart = $noeventlogs = $instancestart = $disablemonitoring = $false
$increasedextents = $commandprompt = $singleuser = $false

if ($commandpromptparm -ne $null) { $commandprompt = $true }
if ($minimalstartparm -ne $null) { $minimalstart = $true }
if ($memorytoreserve -eq $null) { $memorytoreserve = 0 }
if ($noeventlogsparm -ne $null) { $noeventlogs = $true }
if ($instancestartparm -ne $null) { $instancestart = $true }
if ($disablemonitoringparm -ne $null) { $disablemonitoring = $true }
if ($increasedextentsparm -ne $null) { $increasedextents = $true }

$singleuserparm = $params | Where-Object { $_.StartsWith('-m') }

if ($singleuserparm.length -ne 0)
{
$singleuser = $true
$singleuserdetails = $singleuserparm.TrimStart('-m')
# It's possible the person specified an application name
# if not, just say that single user is $true
if ($singleuserdetails.length -eq 0)
{
$singleuser = $singleuserdetails
}
}

[PSCustomObject]@{
Server = $Servername
MasterData = $masterdata.TrimStart('-d')
MasterLog = $masterlog.TrimStart('-l')
ErrorLog = $errorlog.TrimStart('-e')
TraceFlags = $traceflags -join ','
CommandPromptStart = $commandprompt
MinimalStart = $minimalstart
MemoryToReserve = $memorytoreserve
SingleUser = $singleuser
NoLoggingToWinEvents = $noeventlogs
StartAsNamedInstance = $instancestart
DisableMonitoring = $disablemonitoring
IncreasedExtents = $increasedextents
ParameterString = $wmisvc.StartupParameters
}
}
}

# This command is in the internal function
# It's sorta like Invoke-Command.
Invoke-ManagedComputerCommand -ComputerName $servername -Credential $credential -ScriptBlock $Scriptblock -ArgumentList $servername, $displayname
}
catch
{
Write-Warning "$servername`: $_ "
}
}
}
}