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Date: Tue, 24 Jul 2007 14:44:16 +0300
From: Niklas Holsti <niklas.holsti@nospam.please>
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Subject: Re: How to get the application path
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Date: 2007-07-24T14:44:16+03:00
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Stephen Leake wrote:
> Adam Beneschan <adam@irvine.com> writes:
> 
> 
>>On Jul 23, 5:34 am, Stephen Leake <stephen_le...@stephe-leake.org>
>>wrote:
>>
>>>Rangdalf <rangd...@hotmail.com> writes:
>>>
>>>>Hi,
>>>
>>>>In C# there is something like Application.startupPath. Is there a
>>>>package or function to get this path.
>>>>I can get the current directory but I need the application one.
>>>
>>>In Ada 95, Ada.Command_Line.Command_Name returns the executable name,
>>>which usually (not always) has the full path
...
>>If we assume that Command_Name returns the name of some (executable)
>>file that may or may not be a full path name, then
>>Ada.Directories.Full_Name (Ada.Command_Line.Command_Name) should
>>return the full path, 
> 
> 
> Yes, this is the right solution.

I hardly think so. As I understand it, Full_Name is meant to expand 
simple file names like "file.txt" and relative file-names like 
"../../foo/file.txt" into full names by using the default directory and 
expanding "abbreviations" (A.16 (47)).

If the Command_Name is simply "bong.exe", you cannot expect Full_Name to 
search through the file system to find the directory that contains 
"bong.exe". There could be several such directories. Full_Name cannot 
use the PATH envinroment variable to find the directory because PATH 
only applies to executable files and Full_Name should apply to all files.

If Command_Name gives you only the simple name, and you want the full 
name, I think you must use Ada.Environment_Variables to get the value of 
PATH and then scan the PATH directories for the Command_Name. But then 
it would be simpler to just put the "application path" into a well-named 
environment variable and forget about Command_Name.

-- 
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
       .      @       .