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Re: fstat, file_info and file_test [message #35083 is a reply to message #35075]

Wed, 14 May 2003 11:28

btt
Messages: 345
Registered: December 2000

Senior Member

Richard Younger wrote:
> Ben Tupper wrote:
> [...]
>
>> What I would like to have is a function similar to:
>>
>> result = FILE_ISOPEN(filename)
>>
>> that returns a 1 (for open) or a 0 (for closed). Or, perhaps better in
>> the long run, I'd like to see an /ISOPEN keyword added to FILE_TEST.
>
>
> Hi Ben.
>
> I don't think IDL associates file names with open files except through LUNs,
> so I can only think of the brute force method:
>
> FUNCTION IsFilenameOpen, filename
>
> COMPILE_OPT idl2
>
> test_struc = Fstat(0)
> struc_array = Replicate(test_struc, 129)
>
> FOR i=1, 128 DO BEGIN
> struc_array[i] = Fstat(i)
> ENDFOR
>
> index = Where(struc_array.name EQ File_Expand_Path(filename), count)
>
> IF count EQ 0 THEN RETURN, 0 ELSE RETURN, 1
>
> END
>
> Wouldn't want to put it in an inner loop, though.
>
> Good luck,
> Rich
>
>

Hi,

OK, how about running through the possible LUNs (100-128) until a match
is found. I like the cross-platforminess of your solution.

FUNCTION File_IsOpen, filename

COMPILE_OPT idl2

For i = 100, 128 Do $
If ( (Fstat(i)).NAME EQ File_Expand_Path(filename) ) Then Return, 1

Return, 0
END

Thanks,
Ben

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[Message index]

		Re: fstat, file_info and file_test By: Nigel Wade on Thu, 15 May 2003 02:26
		Re: fstat, file_info and file_test By: Karsten Rodenacker on Thu, 15 May 2003 02:19
		Re: fstat, file_info and file_test By: btt on Wed, 14 May 2003 11:28
		Re: fstat, file_info and file_test By: btt on Wed, 14 May 2003 10:48
		Re: fstat, file_info and file_test By: Bruce Bowler on Wed, 14 May 2003 09:56
		Re: fstat, file_info and file_test By: Richard Younger on Wed, 14 May 2003 09:13
		Re: fstat, file_info and file_test By: Richard Younger on Fri, 16 May 2003 11:16
		Re: fstat, file_info and file_test By: btt on Thu, 15 May 2003 07:56

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