common: Change calling convention for gnupg_spawn_process.
* common/exechelp.h (GNUPG_SPAWN_NONBLOCK): New. (GNUPG_SPAWN_RUN_ASFW, GNUPG_SPAWN_DETACHED): Macro to replace the numbers. * common/exechelp.h (gnupg_spawn_process): Change function to not take an optional stream for stdin but to return one. * common/exechelp-posix.c (gnupg_spawn_process): Implement change. (create_pipe_and_estream): Add args outbound and nonblock. * common/exechelp-w32.c (gnupg_spawn_process): Implement change.
In 2.1 this function is only used at one place and the stdin parameter
is not used. Thus this change is trivial for the callers but along
with estream's new es_poll it is overall simpler to use.
Note that the Windows version has not been tested.
- Signed-off-by: Werner Koch <wk@gnupg.org>