| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <string.h> |
| |
| #include "alloc-util.h" |
| #include "logind-device.h" |
| #include "logind-seat-dbus.h" |
| #include "util.h" |
| |
| Device* device_new(Manager *m, const char *sysfs, bool master) { |
| Device *d; |
| |
| assert(m); |
| assert(sysfs); |
| |
| d = new0(Device, 1); |
| if (!d) |
| return NULL; |
| |
| d->sysfs = strdup(sysfs); |
| if (!d->sysfs) |
| return mfree(d); |
| |
| if (hashmap_put(m->devices, d->sysfs, d) < 0) { |
| free(d->sysfs); |
| return mfree(d); |
| } |
| |
| d->manager = m; |
| d->master = master; |
| dual_timestamp_get(&d->timestamp); |
| |
| return d; |
| } |
| |
| static void device_detach(Device *d) { |
| Seat *s; |
| SessionDevice *sd; |
| |
| assert(d); |
| |
| if (!d->seat) |
| return; |
| |
| while ((sd = d->session_devices)) |
| session_device_free(sd); |
| |
| s = d->seat; |
| LIST_REMOVE(devices, d->seat->devices, d); |
| d->seat = NULL; |
| |
| if (!seat_has_master_device(s)) { |
| seat_add_to_gc_queue(s); |
| seat_send_changed(s, "CanGraphical", NULL); |
| } |
| } |
| |
| void device_free(Device *d) { |
| assert(d); |
| |
| device_detach(d); |
| |
| hashmap_remove(d->manager->devices, d->sysfs); |
| |
| free(d->sysfs); |
| free(d); |
| } |
| |
| void device_attach(Device *d, Seat *s) { |
| Device *i; |
| bool had_master; |
| |
| assert(d); |
| assert(s); |
| |
| if (d->seat == s) |
| return; |
| |
| if (d->seat) |
| device_detach(d); |
| |
| d->seat = s; |
| had_master = seat_has_master_device(s); |
| |
| /* We keep the device list sorted by the "master" flag. That is, master |
| * devices are at the front, other devices at the tail. As there is no |
| * way to easily add devices at the list-tail, we need to iterate the |
| * list to find the first non-master device when adding non-master |
| * devices. We assume there is only a few (normally 1) master devices |
| * per seat, so we iterate only a few times. */ |
| |
| if (d->master || !s->devices) |
| LIST_PREPEND(devices, s->devices, d); |
| else |
| LIST_FOREACH(devices, i, s->devices) { |
| if (!i->devices_next || !i->master) { |
| LIST_INSERT_AFTER(devices, s->devices, i, d); |
| break; |
| } |
| } |
| |
| if (!had_master && d->master && s->started) { |
| seat_save(s); |
| seat_send_changed(s, "CanGraphical", NULL); |
| } |
| } |