Remove "nodelete" linker flag now that we use sd-bus and not dbus-glib,
so that libraries that pam_fprintd links to can be unloaded.
This was added because GLib's type system expects to be initialised
once and only once per process, and re-loading this type system when it
had already been initialised caused crashes.
This pam plugin never used GDBus because it transparently uses threads
which do not work well with a lot of PAM applications. But even settling
on the "still better to use than plain dbus library" dbus-glib wasn't
without problems, as any use or initialisation of GIO sockets would
modify signal handler for signals such as SIGPIPE (see gio/gsocket.c).
Many years later, sd-bus is a more modern alternative to the bare dbus
library with a better API.
This includes:
- Removing use of gboolean, guint, g_new0() and many glib string helpers
- Simplifying debug logging
- Marking user-facing messages to be translated
Fix linking error as the "store" global variable gets redeclared in
each C file that includes the header. Move the actual declaration to
main.c.
Fixes:
/usr/bin/ld: ./.libs/libfprintd.a(device.o):/builds/libfprint/fprintd/src/storage.h:51: multiple definition of `store'; main.o:/builds/libfprint/fprintd/src/storage.h:51: first defined here
Add scripting capabilities to the verification process so that the mock
daemon can send its own results without needing the client to prod it to
do that. This is incredibly useful when the client is single threaded
and blocking.
Note that there are barely any safeguards, so the scripting task is not
cancelled if an error occurs, or the VerifyStatus signals are sent out
of order.
This API was added to libfprint to allow drivers to report the match
result early before the operation has been completed. No driver makes
use of this facility yet and instead drivers try to finish the
operation early for quick result reporting. This primarily means not
waiting for finger removal.
Once drivers are updated, fprintd reactivity will regress unless the
early match callback is implemented as they would only get an operation
finished callback when the whole of the operation was finished,
including finger removal and finishing up USB communications.
See: https://gitlab.freedesktop.org/libfprint/fprintd/issues/35
