allow executing a path in backslash notation

[Ilguiz Latypov]

On Mar 10 10:25, Corinna Vinschen wrote:
> execv (argv[1], args);

>  bash$ gcc -o exec exec.c
>  bash$ ./exec /bin/echo
>  abc
>  bash$ ./exec C:\\cygwin\\bin\\echo
>  abc
Thanks for trying a test case.  I am attaching a new test case that 
shows that the trouble was with execvp(), not exec().  Only execvp() 
calls find_exec() which fails to find a file in backslash notation,

  find_exec (path, buf, "PATH=", FE_NNF)

Another call to find_exec in spawnvpe() seems to succeed,

  find_exec (file, buf)

So, perhaps, another way to address the issue is to call find_exec()
without the 2 extra parameters.  I find it confusing that the 
function did not work despite its numerous options and its usage of 
isdrive() implying attempts to handle Windows native paths.

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