Libraries/Bootloader/Includes/Bootloader.Grub2.psm1
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.SYNOPSIS Search for a grub configuration .DESCRIPTION Search into local partition for a grub.cfg file. Default search for a "grub.cfg" file. If config name is overriden, use -Filename to search for custom filename. .EXAMPLE Find-OSBootloaderGrub2Cfg -Path "/boot" .EXAMPLE Find-OSBootloaderGrub2Cfg -Path "/boot" -Filename "mygrub.cfg" .NOTES General notes #> function Find-OSBootloaderGrub2Cfg { [CmdletBinding()] [OutputType([String])] Param ( # Path to start search [Parameter(Mandatory = $true, ValueFromPipeLine = $true)][string]$Path, # Custom filename to search for [Parameter(Mandatory = $false, ValueFromPipeLine = $false)][string]$Filename = "grub.cfg", # Search as far as MaxDepth deep [Parameter(Mandatory = $false, ValueFromPipeLine = $false)][uint32]$MaxDepth = 3 ) Begin { Write-EnterFunction } Process { $grubcfg = Get-ChildItem -Path $Path $Filename -Recurse -Depth $MaxDepth -ErrorAction SilentlyContinue return ${grubcfg}?.fullname } End { Write-LeaveFunction } } function Get-OSBootloaderGrub2DefaultBoot { [CmdletBinding()] [OutputType([String])] Param ( [Alias('ConfigFile')] [Parameter(Mandatory = $false, ValueFromPipeLine = $false)][string]$Grub2Cfg = "/boot/Grub2/Grub2.cfg" ) Begin { Write-EnterFunction } Process { $rc = (Get-Content $Grub2Cfg | select-string "^LABEL") | ForEach-Object { $_ -match "^LABEL\s*(?<label>\w+)" } if ($rc) { return $Matches.label } else { return $null } } End { Write-LeaveFunction } } function Set-OSBootloaderGrub2DefaultBoot { [CmdletBinding()] [OutputType([System.Boolean])] Param ( [Alias('ConfigFile')] [Parameter(Mandatory = $false, ValueFromPipeLine = $false)][string]$Grub2Cfg = "/boot/Grub2/Grub2.cfg", [Parameter(Mandatory = $true, ValueFromPipeLine = $false)][string]$label ) Begin { Write-EnterFunction } Process { $Grub2 = (Get-Content $Grub2Cfg -Raw) -replace "^DEFAULT .*", "DEFAULT $label" $Grub2 | Out-File $Grub2Cfg return $? } End { Write-LeaveFunction } } function Get-OSBootloaderGrub2BootEntries { [CmdletBinding()] [OutputType([String])] Param ( # Custom filename to search on [Parameter(Mandatory = $true, ValueFromPipeLine = $true)][string]$Filename, # Show all entries label [Parameter(Mandatory = $false, ParameterSetName = 'ALL')][switch]$All ) Begin { Write-EnterFunction } Process { $menuEntries = @() # $submenuEntries = @() if (Test-FileExist $Filename) { # parse grub.cfg # To extract correct §, we need to read the file with -Raw parameter # (?ms) sets regex options m (treats ^ and $ as line anchors) and s (makes . match \n (newlines) too`. # ^## .*? matches any line starting with ## and any subsequent characters *non-greedily* (non-greedy is '.*?' set of characters at the end of pattern). # -AllMatches to get... well... all matches $content = Get-Content -Raw $Filename | Select-String -Pattern '(?ms)^menuentry .*?^}$' -AllMatches # edevel("MESSAGES = " + $MESSAGES.Matches[0]) # Write-Debug "MESSAGE = $MESSAGE" foreach ($msg in $content.Matches) { $menuEntry = [PSCustomObject]@{} $menuEntry | Add-Member -MemberType NoteProperty -name "Bootloader" -Value "grub2" $menuEntry | Add-Member -MemberType NoteProperty -name "Filename" -Value $Filename if ($msg.value -match "^menuentry '(?<label>.*?)' .*") { $menuEntry | Add-Member -MemberType NoteProperty -name "Label" -Value $Matches.label } if ($msg.value -match "`n\s*linux\s*(?<kernel>.*)") { $menuEntry | Add-Member -MemberType NoteProperty -name "kernel" -Value $Matches.kernel } if ($msg.value -match "`n\s*initrd\s*(?<initrd>.*)") { $menuEntry | Add-Member -MemberType NoteProperty -name "initrd" -Value $Matches.initrd } $menuEntries += $menuEntry } } else { return $null } return $menuEntries } End { Write-LeaveFunction } } |