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Date: Tue, 21 Aug 2007 17:00:31 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Shell scripts on FAT volumes
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On Aug 21 15:37, Thorsten Kampe wrote:
> [Cygwin latest snapshot]
> 
> I just noticed (on two different Windows XP) Cygwin installation that 
> Shebang shell scripts are not executable on FAT32 volumes (like usb 
> drives). The mount man page says "Normally, files ending in certain 
> extensions (.exe, .com,  .bat,  .cmd) are  assumed  to be executable.  
> Files whose first two characters begin with  '#!' are also considered 
> to be executable."
> 
> Is that expected behaviour?

Right now, yes.  I have disabled code which sets the x bit by reading
the first bytes of a file to figure out if it starts with magic chars
like '#!'.  The reason I disabled this code in the first place is the
fact that it's not thread safe.  I even considered it entirely
unnecessary, but apparently it's not.  However, even though the scripts
don't have the x bit set, they are nevertheless executable.  Try it:

  (This is on FAT)
  $ cat > x.sh << EOF
  #!/bin/bash
  echo hallo
  EOF
  $ ls -l x.sh
  -rw-r--r-- 1 corinna users 23 Aug 21 16:55 x.sh
  $ ./x.sh
  hallo
  $


Corinna

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

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