os_win32/update-smart-drivedb.ps1.in: New drivedb.h update script.

It verifies the downloaded drive database with GnuPG (#752).
Makefile.am: Add new file.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@5308 4ea69e1a-61f1-4043-bf83-b5c94c648137

smartmontools/ChangeLog

 $Id$
 
+2022-02-01  Christian Franke  <franke@computer.org>
+
+	os_win32/update-smart-drivedb.ps1.in: New drivedb.h update script.
+	It verifies the downloaded drive database with GnuPG (#752).
+	Makefile.am: Add new file.
+
 2022-01-29  Douglas Gilbert  <dgilbert@interlog.com>
 
 	scsiprint.cpp: fix issue with Zoned block device

smartmontools/Makefile.am

@@ -426,6 +426,7 @@ EXTRA_DIST = \
         os_win32/smartd_warning.cmd \
         os_win32/syslogevt.mc \
         os_win32/update-smart-drivedb.nsi \
+        os_win32/update-smart-drivedb.ps1.in \
         os_win32/versioninfo.rc.in \
         os_win32/wtssendmsg.c \
         $(docs_DATA) \
@@ -875,6 +876,8 @@ if OS_WIN32_NSIS
 EXEFILES_WIN32 += \
         $(exedir_win32)/update-smart-drivedb.exe
 endif
+EXEFILES_WIN32 += \
+        $(exedir_win32)/update-smart-drivedb.ps1
 endif
 
 FILES_WIN32 = \
@@ -912,6 +915,7 @@ CLEANFILES += \
         syslogevt.h \
         syslogevt.rc syslogevt_*.bin \
         update-smart-drivedb.exe \
+        update-smart-drivedb.ps1 \
         wtssendmsg.exe wtssendmsg_res.rc
 
 # Note: Only use without options to be compatible with all variants
@@ -991,6 +995,10 @@ $(exedir_win32)/%.ps1: $(srcdir)/os_win32/%.ps1
 	$(UNIX2DOS) < $< > $@
 	touch -r $< $@
 
+$(exedir_win32)/%.ps1: %.ps1
+	$(UNIX2DOS) < $< > $@
+	touch -r $< $@
+
 $(docdir_win32)/%.html: %.html
 	$(UNIX2DOS) < $< > $@
 	touch -r $< $@
@@ -1039,6 +1047,10 @@ runcmda.exe: runcmd.o runcmda_res.o
 wtssendmsg.exe: os_win32/wtssendmsg.c wtssendmsg_res.o
 	$(CC) -Os -o $@ $^ -lwtsapi32
 
+# Build drivedb.h update script
+update-smart-drivedb.ps1: os_win32/update-smart-drivedb.ps1.in config.status
+	$(SHELL) ./config.status --file=$@:$<
+
 # MSVC Version to change in make command line
 vc = 16
 vcver = $(vc)

smartmontools/os_win32/update-smart-drivedb.ps1.in

+#
+# smartmontools drive database update script for Windows
+#
+# Home page of code is: https://www.smartmontools.org
+#
+# Copyright (C) 2022 Christian Franke
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# $Id$
+#
+
+<#
+  .SYNOPSIS
+  Update smartmontools @VERSION@ drive database.
+
+  .DESCRIPTION
+  update-smart-drivedb.ps1 updates SCRIPTDIR/drivedb.h from
+  branches/@DRIVEDB_BRANCH@ of smartmontools SVN repository.
+
+  The downloaded file is verified with OpenPGP/GPG key ID 721042C5.
+  The public key block is included in the script.
+
+  .PARAMETER Smartctl
+  Use this smartctl executable for syntax check ('-Smartctl -' to
+  disable).  The default is smartctl.exe in script directory.
+
+  .PARAMETER UrlOf
+  Use the URL of one of the following locations for download:
+    github (GitHub mirror of SVN repository)
+    sf (Sourceforge code browser)
+    svn (SVN repository)
+    svni (SVN repository via HTTP instead of HTTPS)
+    trac (Trac code browser)
+  The default is 'svn'.
+
+  .PARAMETER Url
+  Download from this URL.  A valid OpenPGP/GPG signature with '.raw.asc'
+  extension must also exist unless '-NoVerify' is also specified.
+
+  .PARAMETER File
+  Copy from local file.  A valid OpenPGP/GPG signature 'FILE.raw.asc'
+  must also exist unless '-NoVerify' is also specified.
+
+  .PARAMETER Trunk
+  Download from SVN trunk.  This requires '-NoVerify' because the trunk
+  versions are not signed.
+
+  .PARAMETER Branch
+  If '-Branch X.Y' is specified, download from
+  branches/RELEASE_X_Y_DRIVEDB.  This also selects the OpenPGP/GPG key
+  for older branches (5.40 to 6.6: Key ID DFD22559).
+
+  .PARAMETER Insecure
+  Don't abort download if certificate verification fails.  This option
+  is also required if a HTTP URL is selected with '-UrlOf' option.
+
+  .PARAMETER NoVerify
+  Don't verify signature with GnuPG.
+
+  .PARAMETER Force
+  Allow downgrades.  By default, the database is not replaced with an
+  older version of the same branch.
+
+  .PARAMETER ExportKey
+  Print the OpenPGP/GPG public key block.
+
+  .PARAMETER DryRun
+  Print download commands only.
+
+  .PARAMETER Quiet
+  Suppress info messages.
+
+  .PARAMETER Drivedb
+  Destination drive database file.
+  The default is drivedb.h in script directory.
+
+  .EXAMPLE
+  update-smart-drivedb.ps1
+  /INSTALLPATH/drivedb.h 7.2/5225 updated to 7.2/5237
+
+  (Regular update)
+
+  .EXAMPLE
+  update-smart-drivedb.ps1 -Force -File /INSTALLPATH/drivedb.h.old
+  /INSTALLPATH/drivedb.h 7.2/5237 downgraded to 7.2/5225
+
+  (Revert to previous version)
+
+  .EXAMPLE
+  update-smart-drivedb -Trunk -NoVerify -Smartctl - drivedb-trunk.h
+  drivedb-trunk.h 7.3/5254 newly installed (NOT VERIFIED)
+
+  (Download the database from SVN trunk to current directory)
+
+  .LINK
+  https://www.smartmontools.org/
+#>
+
+param (
+  [string]$Smartctl,
+  [string]$UrlOf,
+  [string]$Url,
+  [string]$File,
+  [switch]$Trunk,
+  [string]$Branch,
+  [switch]$Insecure,
+  [switch]$NoVerify,
+  [switch]$Force,
+  [switch]$ExportKey,
+  [switch]$DryRun,
+  [switch]$Quiet,
+ #[switch]$Verbose, # Common parameter
+  [Parameter(Position=0)][string]$Drivedb
+)
+
+$ErrorActionPreference = "Stop"
+
+# Set by config.status
+# Default drivedb.h update branch
+$default_branch="@DRIVEDB_BRANCH@"
+
+# GnuPG used to verify signature (disabled if empty)
+$gpg = "@gnupg@"
+
+# Name and Directory of this script
+$myname = $MyInvocation.MyCommand.Name
+$mydir = Split-Path -Path $MyInvocation.MyCommand.Source
+if (!$mydir) {
+  throw "Unknown script directory"
+}
+
+# Default drivedb location
+$default_drivedb = "$mydir/drivedb.h"
+
+# Default command used for syntax check
+$default_smartctl = "$mydir/smartctl"
+
+function error($message)
+{
+  # Echo error messages to stdout because 'Write-Error'
+  # always writes a full 'ErrorRecord' to stderr.
+  echo "${myname}: $message"
+  exit 1
+}
+
+function warning($message)
+{
+  echo "${myname}: (Warning) $message"
+}
+
+function iecho($message)
+{
+  if (!$script:Quiet) {
+    echo $message
+  }
+}
+
+function vecho($message)
+{
+  $message | Write-Verbose
+}
+
+function test_f($file)
+{
+  return Test-Path -PathType Leaf -LiteralPath $file
+}
+
+function touch($file)
+{
+  if (Test-Path -PathType Leaf -LiteralPath $file) {
+    (Get-Item $file).LastWriteTime = Get-Date
+  } else {
+    New-Item -ItemType File -Path $file | Out-Null
+  }
+}
+
+function cmp($file1, $file2)
+{
+  if (!(     (Test-Path -PathType Leaf -LiteralPath $file1) `
+        -and (Test-Path -PathType Leaf -LiteralPath $file2))) {
+    return $false
+  }
+  return (Get-FileHash $file1).hash -eq (Get-FileHash $file2).hash
+}
+
+function rm_f # FILE...
+{
+  foreach ($file in $args) {
+    if (Test-Path -PathType Leaf -LiteralPath $file) {
+      Remove-Item $file
+    }
+  }
+}
+
+function rm_rf($dir)
+{
+  if (Test-Path -PathType Container -LiteralPath $dir) {
+    Remove-Item -Recurse $dir
+  }
+}
+
+function mv_f($oldfile, $newfile)
+{
+  rm_f $newfile
+  Rename-Item $oldfile $newfile
+}
+
+function selecturl($url_of, [ref]$url)
+{
+  switch ($url_of) {
+    'github' {
+       #    https://github.com/smartmontools/smartmontools/raw/origin/$branch/smartmontools/drivedb.h
+       #    https://github.com/smartmonto	ols/smartmontools/raw/master/smartmontools/drivedb.h
+       #    redirected to:
+       $u = 'https://raw.githubusercontent.com/smartmontools/smartmontools/master/smartmontools/drivedb.h'
+     }
+    'sf'   { $u = 'https://sourceforge.net/p/smartmontools/code/HEAD/tree/trunk/smartmontools/drivedb.h?format=raw' }
+    'svn'  { $u = 'https://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools/drivedb.h' }
+    'svni' { $u = 'http://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools/drivedb.h' }
+    'trac' { $u = 'https://www.smartmontools.org/export/HEAD/trunk/smartmontools/drivedb.h' }
+    default { error "${url_of}: is none of 'github sf svn svni trac'" }
+  }
+  $url.Value = $u
+}
+
+function vcopy($src, $dest)
+{
+  if ($script:DryRun) {
+    echo "Copy-Item $src $dest"
+  } else {
+    vecho "Copy-Item $src $dest"
+    Copy-Item $src $dest
+  }
+}
+
+function download($url, $file, [ref]$errmsg)
+{
+  $req = @{ Uri = $url; OutFile = $file; MaximumRedirection = 0 }
+  if ($script:Insecure) {
+    # #Requires -Version 6
+    $req += @{ SkipCertificateCheck = $true }
+  }
+
+  $errmsg.Value = ""
+  if ($script:DryRun) {
+    echo "Invoke-WebRequest $(echo @req)"
+  } else {
+    try {
+      Invoke-WebRequest @req
+    } catch {
+      if ($_.Exception.Message) {
+        $errmsg.Value = $_.Exception.Message
+      } else {
+        $errmsg.Value = "Unknown error"
+      }
+    }
+  }
+}
+
+function check_file($file, $firstchar, $minsize, $maxsize)
+{
+  # Check file size
+  $size = (Get-Item -LiteralPath $file).Length
+  if ($size -lt $minsize) {
+    return "too small file size $size bytes"
+  }
+  if ($size -gt $maxsize) {
+    return "too large file size $size bytes"
+  }
+
+  # Check first chars
+  switch ((Get-Content -LiteralPath $file -TotalCount 1).ToCharArray()[0]) {
+    "$firstchar" { }
+    "<" { return "HTML error message" }
+    default { return "unknown file contents" }
+  }
+
+  return ""
+}
+
+function unexpand_svn_id($source, $dest)
+{
+  # For -NoNewLine:
+  #Requires -Version 5
+  (Get-Content -Raw -Path $source) -replace '\$Id: drivedb\.h [0-9][0-9]* 2[-0-9]* [012][:0-9]*Z [a-z][a-z0-9]* \$','$Id$' `
+  | Set-Content -NoNewLine -Path $dest
+}
+
+function selectkey($branch, [ref]$key)
+{
+  switch -RegEx ($branch) {
+    '^RELEASE_(5_4[0-3]|6_[0-6])_DRIVEDB$' {
+# Smartmontools Signing Key (ext. to 2024) <smartmontools-database@listi.jpberlin.de>
+# Smartmontools Signing Key (through 2018) <smartmontools-database@listi.jpberlin.de>
+# Smartmontools Signing Key (through 2018) <smartmontools-database@lists.sourceforge.net>
+# Key ID DFD22559
+      $key.Value = `
+'-----BEGIN PGP PUBLIC KEY BLOCK-----
+
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+1TC5jSVOIEqOE4TwzRz1Y/dfqSU=
+=3Lcg
+-----END PGP PUBLIC KEY BLOCK-----
+'
+    }
+
+    '^RELEASE_7_[02]_DRIVEDB$' {
+# Smartmontools Signing Key (through 2025) <smartmontools-database@listi.jpberlin.de>
+# Smartmontools Signing Key (through 2020) <smartmontools-database@listi.jpberlin.de>
+# Key ID 721042C5
+      $key.Value = `
+'-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mQINBFwmhpUBEADRoOZaXq13MrqyAmbGe6FlHi6P9ujsT/SJGhTiAoN3W1X56Dbm
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+Q/qvYlwkbKOdlahjoHrFlkhADSBaO9N1OZp3OYDjziIujMdt2IPKnmM=
+=7MQk
+-----END PGP PUBLIC KEY BLOCK-----
+'
+    }
+
+    default {
+      error "No known public key for branches/${branch}"
+    }
+  }
+}
+
+function run_join_out_err($cmd) # $arg1, $arg2, ...
+{
+  $cmdobj = Get-Command -CommandType Application -Name $cmd
+  $ErrorActionPreference = "Continue" # Don't abort command on first stderr output
+  $LASTEXITCODE = 42
+  # Run command and convert ErrorRecords from stderr to plain Strings
+  $($input | & $cmdobj @args 2>&1) | %{ $_.ToString() }
+  $ErrorActionPreference = "Stop"
+}
+
+function gpg_verify($ascfile, $file, [ref]$ok)
+{
+  # Create temp home dir
+  if (!$env:TEMP) { error "Environment variable TEMP is not set" }
+  $gnupgtmp = Join-Path $env:TEMP "gnupg.$(New-Guid)"
+  rm_rf $gnupgtmp
+  New-Item -Type Directory -Path $gnupgtmp | Out-Null
+
+  # Import public key
+  $env:LC_MESSAGES = "C"
+  $out = ($public_key | run_join_out_err $gpg "--batch" "--no-tty" "--homedir=$gnupgtmp" "--import")
+  if ($LASTEXITCODE -ne 0) {
+    echo $out
+    exit 1
+  }
+  vecho $out
+
+  # Verify
+  $out = run_join_out_err $gpg "--batch" "--no-tty" "--homedir=$gnupgtmp" "--verify" $ascfile $file
+  if ($LASTEXITCODE -eq 0) {
+    vecho $out
+    $ok.Value = $true
+  }
+  else {
+    # print gpg error always
+    echo $out
+    $ok.Value = $false
+  }
+
+  # Stop the gpg-agent possibly started by gpg
+  if ($gpgconf) {
+    $out = run_join_out_err $gpgconf "--homedir=$gnupgtmp" "--kill" "gpg-agent"
+    if ($LASTEXITCODE -ne 0) {
+      echo $out
+    }
+  }
+
+  # Remove temp home dir
+  try {
+    rm_rf "$gnupgtmp"
+  } catch {
+    warning "$_"
+  }
+}
+
+function get_db_version($file)
+{
+  $x = (Select-String -CaseSensitive -Pattern '^[ {]*"VERSION: *[^"]*"' -Path $file).Line `
+       -replace '^[ {]*"VERSION: ([1-9][./0-9]* [^"]*)".*$','$1'
+  $v = $x -replace ' .*$',''
+  if ($v -match '^[1-9][.0-9]*$') { # trunk: get rev from expanded SVN-Id
+    $r = $x -replace '^[^$]*\$Id: drivedb\.h ([1-9][0-9]*) .*$','$1'
+    if (!($r -match '^[1-9][0-9]*$')) {
+      $r = "?"
+    }
+    $v = "$v/$r"
+  } elseif (!($v -match '^[1-9][./0-9]*$')) {
+    return ""
+  }
+  return $v
+}
+
+function mv_all($prefix, $old, $new)
+{
+  mv_f "${prefix}${old}" "${prefix}${new}"
+  mv_f "${prefix}${old}.raw" "${prefix}${new}.raw"
+  if (test_f "${prefix}${old}.raw.asc") {
+    mv_f "${prefix}${old}.raw.asc" "${prefix}${new}.raw.asc"
+  } else {
+    rm_f "${prefix}${new}.raw.asc"
+  }
+}
+
+# Set defaults
+if (!$Smartctl) {
+  $Smartctl = $default_smartctl
+}
+
+if ($Branch) {
+  $brname = $Branch -replace '^([567])\.([0-9][0-9]*)$','RELEASE_$1_$2_DRIVEDB'
+  if ($brname -eq $Branch) {
+    error "invalid branch version '${Branch}'"
+  }
+} else {
+  $brname = $default_branch
+}
+
+if (!$Drivedb) {
+  $Drivedb = $default_drivedb
+}
+
+if ($ExportKey) {
+  $key = ""
+  selectkey $brname ([ref]$key)
+  echo $key
+  exit 0
+}
+
+# Check selected source
+if (!$Url -and !$File) {
+  if (!$UrlOf) {
+    $UrlOf = "svn"
+  }
+  $Url = ""
+  selecturl $UrlOf ([ref]$Url)
+  if (!$Trunk) {
+    $Url = $Url -replace "/trunk/","/branches/$brname/"
+    $Url = $Url -replace "/master/","/origin/$brname/"
+  } elseif (!$NoVerify) {
+    error "'-Trunk' requires '-NoVerify'"
+  }
+} elseif (!$UrlOf -and $Url -and !$File) {
+  if (!($Url -match '^[a-z][a-z0-9]*:[^ ][^ ]*$')) {
+    error "${Url}: Invalid URL"
+  }
+} elseif (!$UrlOf -and !$Url -and $File) {
+} else {
+  error "only one of '-UrlOf', '-Url', '-File' is allowed"
+}
+
+# Determine path of signature file
+$FileAsc = ""
+$UrlAsc = ""
+if (!$NoVerify) {
+  if (!$Url) {
+    $FileAsc = "${File}.raw.asc"
+  } elseif ($Url -match '\?') {
+    $UrlAsc = $Url -replace '\?','.raw.asc?'
+  } else {
+    $UrlAsc = "${Url}.raw.asc"
+  }
+}
+
+# Check option compatibility
+if ($UrlOf -eq "svni") {
+  if ($Insecure) {
+    $Insecure = $false
+  }
+  else {
+    error "'-UrlOf svni' requires '-Insecure'"
+  }
+}
+
+# Check for smartctl
+if ($Smartctl -ne "-") {
+  if (!(Get-Command -Type Application -Name $Smartctl -ErrorAction Ignore)) {
+    error "${Smartctl}: not found ('-Smartctl -' to ignore)"
+  }
+}
+
+# Check for GnuPG
+$gpgconf = ""
+if (!$NoVerify) {
+  $gpgobj = $null
+  if ($gpg) {
+    $gpgobj = Get-Command -Type Application -Name $gpg -ErrorAction Ignore
+  }
+  if (!$gpgobj) {
+    error "GnuPG is not available ('-NoVerify' to ignore)"
+  }
+  $public_key = ""
+  selectkey $brname ([ref]$public_key)
+  # Check for gpgconf in same directory
+  $gpgconf = "gpgconf"
+  $gpgconfobj = Get-Command -Type Application -Name $gpgconf -ErrorAction Ignore;
+  if (!($gpgconfobj -and ((Split-Path $gpgobj.Source) -eq (Split-Path $gpgconfobj.Source)))) {
+    $gpgconf = ""
+  }
+}
+
+# Remove possible garbage from last download
+if (!$DryRun) {
+  rm_f "${Drivedb}.new" "${Drivedb}.new.raw" "${Drivedb}.new.raw.asc"
+}
+
+if ($Url) {
+  # Download
+  vecho "Download drivedb.h"
+  $errmsg = ""
+  download $Url "${Drivedb}.new" ([ref]$errmsg)
+  if ($errmsg) {
+    rm_f "${Drivedb}.new"
+    error "drivedb.h: download failed: $errmsg"
+  }
+
+  if ($UrlAsc) {
+    vecho "Download drivedb.h.raw.asc"
+    download $UrlAsc "${Drivedb}.new.raw.asc" ([ref]$errmsg)
+    if ($errmsg) {
+      rm_f "${Drivedb}.new" "${Drivedb}.new.raw.asc"
+      error "drivedb.h.raw.asc: download failed: $errmsg ('-NoVerify' to ignore)"
+    }
+  }
+} else {
+  # Copy from local file
+  if (!(test_f $File)) {
+    error "${File}: file not found"
+  }
+  if ($FileAsc -and !(test_f $FileAsc)) {
+    error "${FileAsc}: file not found ('-NoVerify' to ignore)"
+  }
+
+  vcopy $File "${Drivedb}.new"
+  if ($FileAsc) {
+    vcopy $FileAsc "${Drivedb}.new.raw.asc"
+  }
+}
+
+if ($DryRun) {
+  exit 0
+}
+
+# Check files and adjust timestamps
+$errmsg = check_file "${Drivedb}.new" '/' 10000 1000000
+if ($errmsg) {
+  rm_f "${Drivedb}.new.raw.asc"
+  mv_f "${Drivedb}.new" "${Drivedb}.error"
+  error "${Drivedb}.error: $errmsg"
+}
+touch "${Drivedb}.new"
+
+if (test_f "${Drivedb}.new.raw.asc") {
+  $errmsg = check_file "${Drivedb}.new.raw.asc" '-' 200 2000
+  if ($errmsg) {
+    rm_f "${Drivedb}.new"
+    mv_f "${Drivedb}.new.raw.asc" "${Drivedb}.error.raw.asc"
+    error "${Drivedb}.error.raw.asc: $errmsg"
+  }
+  touch "${Drivedb}.new.raw.asc"
+}
+
+# Create raw file with unexpanded SVN Id
+# (This assumes newlines are LF and not CR/LF)
+unexpand_svn_id "${Drivedb}.new" "${Drivedb}.new.raw"
+
+# Check whether installed file is identical
+$equal = $false
+if (test_f $Drivedb) {
+  if (!(test_f "${Drivedb}.raw")) {
+    # Create missing raw file
+    unexpand_svn_id "${Drivedb}" "${Drivedb}.raw"
+  }
+  # Ignore missing Id keyword expansion in new file
+  if (      (cmp "${Drivedb}.raw" "${Drivedb}.new.raw") `
+      -and (    (cmp "${Drivedb}"     "${Drivedb}.new") `
+            -or (cmp "${Drivedb}.raw" "${Drivedb}.new"))) {
+    $equal = $true
+  }
+}
+
+if (!$NoVerify) {
+  # Verify raw file
+  $ok = $false
+  gpg_verify "${Drivedb}.new.raw.asc" "${Drivedb}.new.raw" ([ref]$ok)
+  if (!$ok) {
+    mv_all $Drivedb ".new" ".error"
+    if ($equal) {
+      warning "${Drivedb}: *** installed file is identical to broken new file ***"
+    }
+    error "${Drivedb}.error.raw: *** BAD signature or outdated key ***"
+  }
+}
+
+# Get version
+$newver = get_db_version "${Drivedb}.new"
+if (!$newver) {
+  if (!$Force) {
+    mv_all $Drivedb ".new" ".error"
+    error "${Drivedb}.error: no VERSION information found ('-Force' to ignore)"
+  }
+  $newver = "?/?"
+} elseif ($newver -match '/\?$') {
+  if (!$Trunk) {
+    mv_all $Drivedb ".new" ".error"
+    error "${Drivedb}.error: VERSION information is incomplete ('-Trunk' to ignore)"
+  }
+}
+
+if ($Smartctl -ne "-") {
+  # Check syntax
+  run_join_out_err $Smartctl -B "${Drivedb}.new" -P showall | Out-Null
+  if (!$?) {
+    mv_all $Drivedb ".new" ".error"
+    error "${Drivedb}.error: rejected by $Smartctl, probably no longer compatible"
+  }
+  vecho "${Smartctl}: syntax OK"
+}
+
+# Always install if missing
+rm_f "${Drivedb}.lastcheck"
+if (!(Test-Path -PathType Leaf -Path $Drivedb)) {
+  mv_all $Drivedb ".new" ""
+  iecho "$Drivedb $newver newly installed$(if ($NoVerify) {" (NOT VERIFIED)"})"
+  exit 0
+}
+
+# Keep old file if identical
+if ($equal) {
+  if (test_f "${Drivedb}.new.raw.asc") {
+    if (!(cmp "${Drivedb}.new.raw.asc" "${Drivedb}.raw.asc")) {
+      mv_f "${Drivedb}.new.raw.asc" "${Drivedb}.raw.asc"
+      iecho "${Drivedb}.raw.asc $newver updated"
+    }
+  }
+  rm_f "${Drivedb}.new" "${Drivedb}.new.raw" "${Drivedb}.new.raw.asc"
+  touch "${Drivedb}.lastcheck"
+  iecho "$Drivedb $newver is already up to date$(if ($NoVerify) {" (NOT VERIFIED)"})"
+  exit 0
+}
+
+# Check branch and file version
+$oldver = $(get_db_version "${Drivedb}")
+if (!$oldver) {
+  $oldver = "?/?"
+}
+
+if (    ($newver -match '/\?$') `
+    -or ($oldver -match '/\?$') `
+    -or (($newver -replace '/.*$','') -ne ($oldver -replace '/.*$',''))) {
+  # Always install from trunk or other branch
+  $updmsg = "replaced with"
+} elseif ((($newver -replace '^.*/','') - ($oldver -replace '^.*/','')) -lt 0) {
+  # Install older file only if '-Force' is used
+  if (!$Force) {
+    rm_f "${Drivedb}.new" "${Drivedb}.new.raw" "${Drivedb}.new.raw.asc"
+    iecho "$Drivedb $oldver not downgraded to $newver ('-Force' to override)"
+    exit 0
+  }
+  $updmsg = "downgraded to"
+} else {
+  $updmsg = "updated to"
+}
+
+mv_all $Drivedb "" ".old"
+mv_all $Drivedb ".new" ""
+iecho "$Drivedb $oldver $updmsg $newver$(if ($NoVerify) {" (NOT VERIFIED)"})"
+exit 0