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Re: Directory existence prevents .exe execution
- From: Igor Peshansky <pechtcha at cs dot nyu dot edu>
- To: Luke Kendall <luke dot kendall at cisra dot canon dot com dot au>
- Cc: cygwin at cygwin dot com
- Date: Thu, 17 Apr 2008 09:06:09 -0400 (EDT)
- Subject: Re: Directory existence prevents .exe execution
- References: <firstname.lastname@example.org>
- Reply-to: cygwin at cygwin dot com
On Wed, 16 Apr 2008, Luke Kendall wrote:
> We have the Ici scripting language installed on Windows. Ici expects a
> directory called "ici" to exist alongside, where various libraries are
> installedd to provide extra functionality.
> Unfortunately, under Cygwin, if w try to run the command "ici" we get
> the error "ici: command not found", because Cygwin chooses to try to
> execute the directory instead of the .exe:
This behavior (preferring the unadorned file name to the .exe) has been in
existence for a while (at least a year). We relied on the old behavior by
having a script and a .exe with the same name (and expecting the .exe to
be invoked on Windows/Cygwin). I remember we've had to work around this
issue when the change happened, by prepending the following to our script:
[ -x "$0.exe" ] && exec "$0.exe" "$@"
> $ /opt/bin/ici /cygdrive/x/bin/script/cfnhdr
> bash: /opt/bin/ici: is a directory
> $ ls -ld /opt/bin/ici
> drwxr-xr-x 1 luke Domain Users 0 Oct 17 2005 /opt/bin/ici
> $ ls -ld /opt/bin/ici.*
> -rwxr-xr-x 1 luke Domain Users 233503 Apr 18 2000 /opt/bin/ici.dll
> -rwxr-xr-x 1 luke Domain Users 24576 Jan 29 2003 /opt/bin/ici.exe
> I tried naming the ici directory Ici but it made no difference.
Try also CYGWIN="$CYGWIN check_case:strict" (while the code is still in
the DLL) or managed mounts... The latter won't work unless ici.exe is a
> The directory /opt/bin is mounted like so:
> $ mount
> \\samba\syncopt\microsoft.x86.win\bin on /opt/bin type system (textmode,exec)
> Using binmode doesn't help. Is this a bug, that bash tries to execute a
> directory even when there's an executable (with an implicit .exe suffix,
> naturally) of the same name in existence ?
No, this is expected behavior (if you search through bash release
announcements, you should be able to see the exact point at which the
> If not, can anyone suggest a workaround?
Other than renaming the directory or using a wrapper script, no.
> I can't just append a .exe to the #!/opt/bin/ici shell wrapper since
> then the scripts wouldn't run from Unix.
How do these scripts *ever* run from Unix? Unix would definitely not be
aware of the .exe suffix, and would always attempt to execute
/opt/bin/ici, which, as you say, is a directory. Do you have a
/opt/bin/ici script as well?
In any case, whatever solution you use to make it work from Unix should
work on Cygwin as well.
> Is there a bash option that controls this, maybe (I couldn't see one)?
There is no bash option to control this, AFAIK.
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