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Date: Tue, 31 Jan 2006 23:00:15 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.19-4 exec family of functions find wrong file to execute
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On Jan 23 11:12, Martin wrote:
> I am attempting to invoke a command with
> execvp/execlp.  If a file appears in my PATH before
> the executable desired and has the same name as the
> executable, the first occurrence of the file name is
> used as the executable to invoke.  Even though the
> first file is NOT marked as executable.
> 
> The attached testcase illustrates this.
> Here's a simple shell log:
> 
> bash-3.00$ gcc test2.c -o test2
> bash-3.00$ PATH=/usr/bin:.
> bash-3.00$ test2 nopathnoext
> NoPathNoExt
> bash-3.00$ touch echo
> bash-3.00$ ls -l echo
> -rw-r--r-- 1 test None 0 Jan 21 15:39 echo
> bash-3.00$ test2 nopathnoext
> NoPathNoExt
> bash-3.00$ PATH=.:/usr/bin
> bash-3.00$ test2 nopathnoext
> nopathnoext: No such device or address
> bash-3.00$ rm -f echo
> bash-3.00$ test2 nopathnoext
> NoPathNoExt
> bash-3.00$ echo garbage > echo
> bash-3.00$ test2 nopathnoext
> nopathnoext: Permission denied
> bash-3.00$ ls -l echo
> -rw-r--r-- 1 test None 8 Jan 21 15:40 echo
> bash-3.00$ test2 nopathext
> NoPathExt
> bash-3.00$ test2 path
> Path
> 
> Is this normal behavior for execlp/execvp?
> Shouldn't the execution permission be set in order to
> execute it?

There was a tiny bug in the path evaluation.  I've applied a fix.  Please
give the next developer's snapshot a try.  http://cygwin.com/snapshots/


Thanks for the report and the testcase,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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