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Re: Error in access() with long file names
- To: Michael Eager <eager at eagercon dot com>, Cygwin <cygwin at cygwin dot com>
- Subject: Re: Error in access() with long file names
- From: Randall R Schulz <rrschulz at cris dot com>
- Date: Tue, 10 Jul 2001 12:30:02 -0700
- Cc: eager at mvista dot com
Michael,
You didn't say whether you're using NTFS, but if so, the : at the end might
be tripping up either Cygwin or, conceivable, Windows. The name you gave
takes the form of a file stream (and independent sub-file, a kind of
generalized file "fork" if you're familiar with the Macintosh file
systems). This is the case owing to the presence of the colon with more
than one character to its left.
I tend to doubt the slash is allowable after the colon, but I'm not sure.
It's not that I think access() should return true for this name, but just
that I wanted to point out the possibility that you're hitting something
relatively obscure. As I said, it's only supported in NTFS, not in FAT file
systems.
Randall Schulz
Mountain View, CA USA
At 09:39 2001-07-10, Michael Eager wrote:
>Using the most recent version of Cygwin.
>
>The access function return success when given a long string argument
>which does not represent a valid file. There is some sensitivity to the
>characters in the string. Removing the colon (and perhaps some other
>characters) in the example program below gives correct results.
>
>Anyone know of a fix?
>
>===================================
>
>#include <stdio.h>
>#include <unistd.h>
>
>char name[] =
> "aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeffffffffffgggggggggghhh"
> "hhhhhhhiiiiiiiiiijjjjjjjjjjkkkkkkkkkkkllllllllllmmmmmmmmmmnnnnnnnnnnooooo"
> "oooooppppppppppqqqqqqqqqqrrrrrrrrrrssssssssssttttttttttuuuuuuuuuuvvvvvvvv"
> "vvwwwwwwwwwwxxxxxxxxxxyyyyyyyyyyzzzzzzzzzz01234567890:/";
>
>int main()
>{
> if (access (name, R_OK) == 0)
> printf ("%s is readable\n", name);
> else
> printf ("%s is NOT readable\n", name);
>
> return 0;
>}
>
>
>--
>Michael Eager Eager Consulting eager@eagercon.com
>1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
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