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comp.lang.ruby

working with the registry

Thufir Hawat

12/8/2007 1:15:00 AM

I found:

require 'win32/registry'
keyname = 'SYSTEM\CurrentControlSet\Control\Session Manager
\Environment'
access = Win32::Registry::KEY_ALL_ACCESS
Win32::Registry::HKEY_LOCAL_MACHINE.open(keyname, access) do |reg|
# Add to path
['c:\foo\bin', 'c:\bar\bin'].each do |directory|
unless (reg['path'].include? directory)
reg['path'] += ';' + directory
end
end
# Add environment variable
reg['foobar'] = '42'
# Note: won't take effect until restart!
end

<http://multipart-mixed.com/downloads...
spectra_d500_lessons_learned.pdf>


but would like to query the registry from ruby. Just thinking outloud
here, haven't found a tutorial invovling the registry and ruby which I
find useful yet :(


C:\msi>
C:\msi>
C:\msi>dir
Volume in drive C has no label.
Volume Serial Number is 0491-510F


Directory of C:\msi


12/06/2007 12:36 PM <DIR> .
12/06/2007 12:36 PM <DIR> ..
12/06/2007 12:25 PM 10,970,624 python-2.5.1.msi
1 File(s) 10,970,624 bytes
2 Dir(s) 28,396,879,872 bytes free


C:\msi>
C:\msi>reg query HKEY_LOCAL_MACHINE\Software\Policies\Microsoft
\Windows
\Installe
r


! REG.EXE VERSION 3.0


HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer
EnableAdminTSRemote REG_DWORD 0x1


C:\msi>
C:\msi>reg query HKEY_CURRENT_USER\Software\Policies\Microsoft
\Windows


! REG.EXE VERSION 3.0


HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows

HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\\Control Panel


HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\\System


C:\msi>



thanks,

Thufir
3 Answers

yermej

12/8/2007 2:32:00 AM

0

On Dec 7, 7:15 pm, Thufir <hawat.thu...@gmail.com> wrote:
> but would like to query the registry from ruby. Just thinking outloud
> here, haven't found a tutorial invovling the registry and ruby which I
> find useful yet :(

The following is what I was able to figure out from the standard
library API docs at http://www.ruby-doc.o.... It's pretty
Rubyish once you get going.

>>> C:\msi>reg query HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer

[in irb]
irb> require 'win32/registry'
irb> include Win32

irb> Registry.open(Registry::HKEY_LOCAL_MACHINE, 'Software\Policies
\Microsoft\Windows\Installer').each_value do |subkey, type, data|
irb* puts "#{subkey} (#{type}): #{data}"
irb> end

The only problem I see with this is that you get the constant value
for type (4 in this case) rather than the constant name (REG_DWORD).
Is that what you were wanting to do?

>>> C:\msi>reg query HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows

I don't have this key on my machine. Only HKEY_CURRENT_USER\Software
\Policies\Microsoft\SystemCertificates which has subkeys, but no
values, but all keys should be similar to the above.

Thufir Hawat

12/12/2007 9:30:00 PM

0

I would like to use:

each_value() {|subkey, type, data| ...}

iterator

[Source]

# File Win32API/lib/win32/registry.rb, line 624
def each_value
index = 0
while true
begin
subkey = API.EnumValue(@hkey, index)
rescue Error
break
end
begin
type, data = read(subkey)
rescue Error
next
end
yield subkey, type, data
index += 1
end
index
end

<http://www.ruby-doc.org/stdlib/libdoc/Win32API/rdoc/clas...
Registry.html>



here's what I have:


irb(main):040:3*
irb(main):041:3*
puts.each_key(Registry.open(Registry::HKEY_LOCAL_MACHINE, 'Software
\Policies\'))
irb(main):042:5' '
irb(main):043:5>
irb(main):044:5*


But I seem to be having some sort of problem with closing quotes
(syntax). Can I do that with the puts method?



thanks,

Thufir

Phrogz

12/12/2007 10:05:00 PM

0

On Dec 12, 2:29 pm, Thufir <hawat.thu...@gmail.com> wrote:
> here's what I have:
>
> irb(main):040:3*
> irb(main):041:3*
> puts.each_key(Registry.open(Registry::HKEY_LOCAL_MACHINE, 'Software
> \Policies\'))
> irb(main):042:5' '
> irb(main):043:5>
> irb(main):044:5*
>
> But I seem to be having some sort of problem with closing quotes
> (syntax).

nickname = 'Gavin \'Phrogz\' Kistner'

The backslashes are escaping your last quote. Instead try:
'Software\\Policies\\'
(use a backslash to escape the backslash)