From: Jim Hunter <jim DOT hunter AT jhuapl DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: A Globbing Problem
Date: Mon, 21 Apr 1997 19:19:47 -0400
Organization: Johns Hopkins University Applied Physics Laboratory
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Jim Hunter wrote:
> 
> Can someone tell me why my code snippets here
> aren't working.
> 
> I'm having a problem with command line
> globbing of long file names. My
> program is given a list of file names
> as inputs on the command line. After
> some processing, I want to conditionally delete
> the files after checking the file attributes.
> The program works fine except in the case
> that there are files with long names getting
> globbed.
> 
> --------------------------------
> ex: dir contents
> 
> A.X
> B.X
> C~1.Y  => long name = C.X.Y
> 
> ---------------------------------
> command lines:
> 
> prog   *.X   -> works fine
> 
> prog   C~1.Y -> works fine
> 
> prog   *.*   -> chokes when it gets to the argument C~1.Y
> 
>   I am using the call:
>   err = _dos_getfileattr( filename,&attr);
> 
>   What's happening is that C~1.Y is getting passed to
> the program as C.X.Y after the *.* expansion and
> _dos_getfileattr returns telling me the file
> doesn't exist (returns 0xFF for attributes).
> 
> Another thing that puzzles me is that stepping
> through the code in gdb with the same command line
> i.e.  | gdb: r *.* | works o.k.
> 
> Thanks for any clues or work-arounds you can
> give me.
> 

I think I've found a bug here with either the DJGGP compiler
or Win95 in the behaviour of _dos_fileattr on globbed long names. 
I've included a short test program and would be grateful if 
someone with a similiar system could run this and tell me
your results. I'm running Win95 with DJGPP v2.7.2. A
workaround I've found is to use _chmod with 0 agruments.

-----------------------------------------------------------
#include <stdio.h>
#include <sys/stat.h>
#include <dos.h>

main(int argc, char **argv)
{
unsigned int attr;
char *file;

if (argc!=2){
	printf("usage: attr file\n");
	exit(1);
}

file = argv[1];
printf("file: %s\n",file);

if(_dos_getfileattr(file,&attr))
	printf("dos_getfileattr: error for %s\n",file);
else
	printf("dos_getfileattr: %03o\n",attr);

if((attr = _chmod(file,0,0))==-1)
	printf("_chmod: error for %s\n",file);
else
	printf("_chmod: %03o\n",attr);

exit(0);
}
-------------------------------------------------------------

The problem only occurs when you glob long names
on the command line. Run this on, say, the 
"Program Files" directory from the command line.

Running c:> attr c:\progra~1

should print 

file: c:\progra~1
dos_getfileattr: 021
_chmod: 021

Running  c:> attr c:\progra*

should print 

file: c:\program files
dos_getfileattr: error for c:\program files
_chmod: 021

thanks,

----
Jim