Re: [Libguestfs] simplify debugging of guestfsd

Introduce a new guestfs_create_flags () call which takes a flag variable. By default, passing flag == 0 is entirely the same as guestfs_create. g = guestfs_create_flags (0); if (!g) error; However you could also use it like this: g = guestfs_create_flags (GUESTFS_CREATE_NO_ENVIRONMENT); if (!g) error; where no environment variable processing is done (hence no errors are possible except ENOMEM). Callers can do environment variable processing later (see guestfs_set_environment above). Or maybe not if they don't want to be affected by the environment. Errors can be handled properly in those later calls. In the language backends, we'd have to map this to more flexible functions, eg. in Perl: my $g = Sys::Guestfs->new (environment => 0); (which is of course backwards compatible with existing code).