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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
commit55944e5e40b1be2afc4855d8d2baf4b73d1876b5 (patch)
tree33f869f55a1b149e9b7c2b7e201867ca5dd52992 /src/login/logind-device.c
parentInitial commit. (diff)
downloadsystemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.tar.xz
systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.zip
Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/login/logind-device.c')
-rw-r--r--src/login/logind-device.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/login/logind-device.c b/src/login/logind-device.c
new file mode 100644
index 0000000..376cd0d
--- /dev/null
+++ b/src/login/logind-device.c
@@ -0,0 +1,104 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <string.h>
+
+#include "alloc-util.h"
+#include "logind-device.h"
+#include "logind-seat-dbus.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_now(&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) {
+ 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);
+ }
+}