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From: "lhall AT pop DOT ma DOT ultranet DOT com" <lhall AT pop DOT ma DOT ultranet DOT com>
To: luke DOT kendall AT cisra DOT canon DOT com DOT au, cygwin AT cygwin DOT com
Subject: Re: Problem in executable file mechanism
Date: Wed, 16 Apr 2003 11:43:40 -0400
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OK, what are you seeing?  I get "bash: ls: command not found" with 
1.3.20 and 1.3.22.

Yes, strace can "change things" and I can see that it "fixes" this 
issue, so it's not much help in debugging it.  This is going to take
some code viewing and possibly a stint with gdb.

Larry


Original Message:
-----------------
From:  luke DOT kendall AT cisra DOT canon DOT com DOT au
Date: Wed, 16 Apr 2003 13:23:32 +1000 (EST)
To: cygwin AT cygwin DOT com
Subject: Re: Problem in executable file mechanism


On 15 Apr, Larry Hall (RFK Partners, Inc.) wrote:
>  Hm.  I tried a quick check here on 1.3.22 and couldn't reproduce this. 
>  Can you put together a small test that demonstrates this and/or provide 
>  the output from strace? 

Well, <long pause here> ... that was a lot harder than I expected!

It turns out the problem *only* manifests if the executable and
directory are in the same directory.  Sorry, I had convinced myself
otherwise before.

Here's how to reproduce:

	mkdir /usr/bin/ls
	hash -r
	ls

It doesn't provide exactly the same symptom as the command I'd tested
with before (where it just silently failed, with exit status 0).  I
haven't been able to work out the difference.  It's not whether it's a
Windows native one or not.

Strangely, if you run the command with strace, the error can not be
reproduced.  Does strace use a different piece of code to invoke its
argument than the shell uses?

>   Also, please take a look at 
>  <http://cygwin.com/problems.html>.

Sorry.  Cygwin 1.3.15, Windows XP (and others); my cygcheck.out is
attached.

luke


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