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#ifndef WLR_BACKEND_SESSION_H
#define WLR_BACKEND_SESSION_H
#include <libudev.h>
#include <stdbool.h>
#include <sys/types.h>
#include <wayland-server-core.h>
struct libseat;
struct wlr_device {
int fd;
int device_id;
dev_t dev;
struct wl_list link;
struct {
struct wl_signal change; // struct wlr_device_change_event
struct wl_signal remove;
} events;
};
struct wlr_session {
/*
* Signal for when the session becomes active/inactive.
* It's called when we swap virtual terminal.
*/
bool active;
/*
* 0 if virtual terminals are not supported
* i.e. seat != "seat0"
*/
unsigned vtnr;
char seat[256];
struct udev *udev;
struct udev_monitor *mon;
struct wl_event_source *udev_event;
struct libseat *seat_handle;
struct wl_event_source *libseat_event;
struct wl_list devices;
struct wl_display *display;
struct wl_listener display_destroy;
struct {
struct wl_signal active;
struct wl_signal add_drm_card; // struct wlr_session_add_event
struct wl_signal destroy;
} events;
};
struct wlr_session_add_event {
const char *path;
};
enum wlr_device_change_type {
WLR_DEVICE_HOTPLUG = 1,
WLR_DEVICE_LEASE,
};
struct wlr_device_hotplug_event {
uint32_t connector_id;
uint32_t prop_id;
};
struct wlr_device_change_event {
enum wlr_device_change_type type;
union {
struct wlr_device_hotplug_event hotplug;
};
};
/*
* Opens a session, taking control of the current virtual terminal.
* This should not be called if another program is already in control
* of the terminal (Xorg, another Wayland compositor, etc.).
*
* If libseat support is not enabled, or if a standalone backend is to be used,
* then you must have CAP_SYS_ADMIN or be root. It is safe to drop privileges
* after this is called.
*
* Returns NULL on error.
*/
struct wlr_session *wlr_session_create(struct wl_display *disp);
/*
* Closes a previously opened session and restores the virtual terminal.
* You should call wlr_session_close_file on each files you opened
* with wlr_session_open_file before you call this.
*/
void wlr_session_destroy(struct wlr_session *session);
/*
* Opens the file at path.
* This can only be used to open DRM or evdev (input) devices.
*
* When the session becomes inactive:
* - DRM files lose their DRM master status
* - evdev files become invalid and should be closed
*
* Returns -errno on error.
*/
struct wlr_device *wlr_session_open_file(struct wlr_session *session,
const char *path);
/*
* Closes a file previously opened with wlr_session_open_file.
*/
void wlr_session_close_file(struct wlr_session *session,
struct wlr_device *device);
/*
* Changes the virtual terminal.
*/
bool wlr_session_change_vt(struct wlr_session *session, unsigned vt);
ssize_t wlr_session_find_gpus(struct wlr_session *session,
size_t ret_len, struct wlr_device **ret);
#endif
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