WARNING: this is really WIP, anything could change, please don't use it yet!
Subd is a collection of helper functions that make using dbus-1 more convenient. For me, at least, but I hope others will find it useful as well :) It is by no means a complete wrapper around libdbus, it just provides some functions that make using the low-level API easier. This means that you still have to use the low-level API with subd - as I have stated earlier, this is just a collection of helper functions.
The reason I wrote these functions is that I started porting an application that uses sd-bus. We don't have sd-bus on FreeBSD (and probably never will), but I really liked some aspects of it (especially the way it lets you define object members, and method handlers). I also didn't want to use a complete DBus library like GDBus or QTDBus, so subd was born.
The scope is very limited currently, it basically provides helpers only in areas I needed to work with so far:
- Opening a connection to the bus.
- Reading and sending messages.
- Implementing the Introspectable interface.
- Dispatching handlers for method type members.
- Handling watches.
DBusConnection *subd_open_session(const char *service_name, DBusError *err);
dbus_bool_t subd_emit_signal(DBusConnection *conn, const char *path,
const char *interface, const char *name, DBusError *err, ...);
dbus_bool_t subd_reply_method_return(DBusConnection *conn, DBusMessage *msg,
DBusError *err, ...);
dbus_bool_t subd_message_read(DBusMessageIter *iter, DBusError *err, ...);struct subd_watches {
struct pollfd *fds;
DBusWatch **watches;
int capacity;
int length;
sem_t mutex;
};
struct subd_watches *subd_init_watches(DBusConnection *conn, struct pollfd *fds,
int size, DBusError *err);enum subd_member_type {
SUBD_METHOD,
SUBD_SIGNAL,
SUBD_PROPERTY,
SUBD_MEMBERS_END,
};
enum subd_property_access {
SUBD_PROPERTY_READ,
SUBD_PROPERTY_WRITE,
SUBD_PROPERTY_READWRITE,
};
struct subd_member {
enum subd_member_type type;
union {
struct {
const char *name;
dbus_bool_t (*handler)(DBusConnection *, DBusMessage *, void *, DBusError *);
const char *input_signature;
const char *output_signature;
} m;
struct {
const char *name;
const char *signature;
} s;
struct {
const char *name;
const char *signature;
enum subd_property_access access;
} p;
int e;
};
};
dbus_bool_t subd_add_object_vtable(DBusConnection *conn, const char *path,
const char *interface, const struct subd_member *members, void *userdata,
DBusError *err);For a detailed description of what each function does, please refer to the include/subd.h file.
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