Created
November 14, 2019 20:00
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Powershell script for adding/removing/viewing entries to the hosts file. [ MIRROR for https://gist.github.com/markembling/173887 ]
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# | |
# Powershell script for adding/removing/showing entries to the hosts file. | |
# | |
# Known limitations: | |
# - does not handle entries with comments afterwards ("<ip> <host> # comment") | |
# | |
$file = "C:\Windows\System32\drivers\etc\hosts" | |
function add-host([string]$filename, [string]$ip, [string]$hostname) { | |
remove-host $filename $hostname | |
$ip + "`t`t" + $hostname | Out-File -encoding ASCII -append $filename | |
} | |
function remove-host([string]$filename, [string]$hostname) { | |
$c = Get-Content $filename | |
$newLines = @() | |
foreach ($line in $c) { | |
$bits = [regex]::Split($line, "\t+") | |
if ($bits.count -eq 2) { | |
if ($bits[1] -ne $hostname) { | |
$newLines += $line | |
} | |
} else { | |
$newLines += $line | |
} | |
} | |
# Write file | |
Clear-Content $filename | |
foreach ($line in $newLines) { | |
$line | Out-File -encoding ASCII -append $filename | |
} | |
} | |
function print-hosts([string]$filename) { | |
$c = Get-Content $filename | |
foreach ($line in $c) { | |
$bits = [regex]::Split($line, "\t+") | |
if ($bits.count -eq 2) { | |
Write-Host $bits[0] `t`t $bits[1] | |
} | |
} | |
} | |
try { | |
if ($args[0] -eq "add") { | |
if ($args.count -lt 3) { | |
throw "Not enough arguments for add." | |
} else { | |
add-host $file $args[1] $args[2] | |
} | |
} elseif ($args[0] -eq "remove") { | |
if ($args.count -lt 2) { | |
throw "Not enough arguments for remove." | |
} else { | |
remove-host $file $args[1] | |
} | |
} elseif ($args[0] -eq "show") { | |
print-hosts $file | |
} else { | |
throw "Invalid operation '" + $args[0] + "' - must be one of 'add', 'remove', 'show'." | |
} | |
} catch { | |
Write-Host $error[0] | |
Write-Host "`nUsage: hosts add <ip> <hostname>`n hosts remove <hostname>`n hosts show" | |
} |
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