[PATCH] Fix for backslash quoting in argument list passing (spawn_guts)

[Pierre Bogossian]

>I've included what I think is a much simpler patch below.  It seems to
>work correctly using a vc compiled program which echos its args.

The problem with your patch is that it can double backslashes even if
they don't precede a '"', and that shouldn't be done !
Here is what I get with your patch:

/tmp $ ./print_args_cygwin.exe 'a a\\a'
1: a a\\a
/tmp $ ./print_args_nocygwin.exe 'a a\\a'
1: a a\\\\a

Another issue is that backslashes that are just before the closing '"'
have to be doubled too:

/tmp $ ./print_args_cygwin.exe 'a a\'
1: a a\
/tmp $ ./print_args_nocygwin.exe 'a a\'
1: a a"

My print_args_nocygwin.exe is compiled with gcc, but I guess the
result is the same with vc.

Pierre Bogossian

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