[ clisp-Bugs-2959335 ] no posix:uid on windows (required by asdf)

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Bugs item #2959335, was opened at 2010-02-26 02:56
Message generated for change (Comment added) made by rurban
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Category: clisp
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: ander-skirnir (ander-skirnir)
Assigned to: Arseny Slobodyuk (ampy)
Summary: no posix:uid on windows (required by asdf)

Initial Comment:
asdf package requires uid symbol from posix, but its not exporting on win32 at all.
so, to load asdf on clisp from win32 now u have to do that:

(in-package #:posix)
(export '(uid))
(in-package #:cl-user)
(load "asdf\\asdf.lisp")

to fix it, u can just add #+win32 (export '(uid)) to the syscalls\\posix.lisp

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Comment By: Reini Urban (rurban)
Date: 2010-03-01 20:04

Message:
I remember: The uid is used in asdf for site-location to discriminate the
.fas cache for different users, which is not relevent for win32.
If you are concerned about a deleted USERNAME env submit a uid patch to
asdf, like 
#+win32 (defun uid () (or (getenv "USERNAME") ""))

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Comment By: Sam Steingold (sds)
Date: 2010-03-01 19:56

Message:
asdf uses getuid in resolve-relative-location-component as a pathname
component.
getenv is no good - it may return NIL which may screw sharing up.
I think returning a struct based on
OpenProcessToken+GetTokenInformation->UUID
and defining a print-object method on it is the best approach.

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Comment By: Reini Urban (rurban)
Date: 2010-03-01 18:55

Message:
I would prefer a simple
#+win32 (defun uid () (getenv "USERNAME"))
#+win32 (defun euid () (getenv "USERNAME"))

and not using the GUID as arseny suggested.

I don't know if the asdf uid is used as number, e.g. format, or used for
numerical sorting.
But asdf should add this patch, as one cannot force windows to return such
a number,
only a string. Windows is no posix, as everyone knows.


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Comment By: Sam Steingold (sds)
Date: 2010-03-01 16:35

Message:
ander-skirnir: what is the original use case for this function? what is the
expected contract?
I don't think getenv is the right way here. I think
OpenProcessToken+GetTokenInformation is the way to go.

Arseny, I don't think string return value is a good idea - we should
return a structure of 3 integers and a byte vector or maybe 5 integers.
you can also provide a printer function which would produce the string you
describe. Would you like to handle this issue? Thanks!

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Comment By: Arseny Slobodyuk (ampy)
Date: 2010-02-28 01:40

Message:
I believe on Windows, user's and group's UUID corresponds userid and
groupid in UNIX. But UUID is a structure 

typedef struct  _GUID
    {
    DWORD Data1;
    WORD Data2;
    WORD Data3;
    BYTE Data4[8];
    }    GUID;

which can be represented as string like
{4208fb66-e22a-11d1-a7d7-00a0c982c00d}. This UUIDS however are unique -
different on different computers.

I dont know how it could help. Possibly "int getuid() {return 0;}" will
do?


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Comment By: ander-skirnir (ander-skirnir)
Date: 2010-02-28 00:41

Message:
quote from some forum: "You can access the Windows environment variable
%USERNAME%. You didn't mention how you want to access it though. Batch
file? Command Prompt? C/C++? With C/C++ you can use the getenv() function
to retrieve specific environment variable values."

useful discuss:
http://stackoverflow.com/questions/1594746/win32-equivalent-of-getuid

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Comment By: Sam Steingold (sds)
Date: 2010-02-26 17:16

Message:
how do we implement uid on windows?
what's the windows analogue of getuid/geteuid/getgid &c?

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