1 files changed, 122 insertions, 0 deletions
diff --git a/src/grp-login/systemd-logind/logind-device.c b/src/grp-login/systemd-logind/logind-device.c
new file mode 100644
index 0000000000..15ef1b10bb
--- /dev/null
+++ b/src/grp-login/systemd-logind/logind-device.c
@@ -0,0 +1,122 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <string.h>
+
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/util.h"
+
+#include "logind-device.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)
+                seat_send_changed(s, "CanGraphical", NULL);
+}