Setting the Windows Path variable for children of a bash script....

Igor Pechtchanski
Wed Feb 9 03:31:00 GMT 2005

On Tue, 8 Feb 2005, Matthew Bogosian wrote:

> Howdy all,
> I've searched through the archives on this, but I've come up empty, so I
> figured I'd ask....
> I'm trying to execute a cygwin-ignorant Windows binary from a bash script.
> However, the DLLs required to load this binary are not in the system- or
> user-wide Windows Path variable (nor do I want them to be). I'm trying to
> modify the environment before execution of this binary, but it doesn't seem to
> work. Here's what I've got:
> # ...
> Path="$(cygpath -pw "${PATH}");$(cygpath -pw "${LD_LIBRARY_PATH}")"
> export Path
> exec /cygdrive/c/path/to/windows/binary.exe
> LD_LIBRARY_PATH contains the paths in which the DLLs specific to binary.exe
> reside. Unfortunately, binary.exe doesn't seem to be able to find them there
> when being invoked from the script's exec command.
> Before someone suggests the obvious, I am using Cygwin and bash (etc.) as a
> test harness for a binary I'm writing. I may test several different versions
> of the binary on the same machine. The DLLs cannot reside in c:\windows\...,
> nor can they reside in the same directory as binary.exe because binary.exe is
> actually c:\Python24\python.exe and the DLLs are from different versions of a
> third-party SDK that I'm accessing via swig/python. In short, I need to be
> able to override where the DLLs are found by the cygwin-ignorant version of
> Python in a shell script on an ad hoc basis.
> Please don't tell me to use Cygwin's python either, since I have to test the
> Windows version using the same test harness.
> Does anyone know how to do this? Any help is much appreciated.

export PATH
exec /cygdrive/c/path/to/windows/binary.exe

The "PATH" variable is treated specially by Cygwin and is translated from
POSIX path format to Windows path format when calling Windows programs.
In your first case it was doing the translation twice, so C:\WINDOWS
became C;C:\WINDOWS.
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