Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : 
       3             : #include <string.h>
       4             : 
       5             : #include "alloc-util.h"
       6             : #include "logind-device.h"
       7             : #include "logind-seat-dbus.h"
       8             : #include "util.h"
       9             : 
      10           0 : Device* device_new(Manager *m, const char *sysfs, bool master) {
      11             :         Device *d;
      12             : 
      13           0 :         assert(m);
      14           0 :         assert(sysfs);
      15             : 
      16           0 :         d = new0(Device, 1);
      17           0 :         if (!d)
      18           0 :                 return NULL;
      19             : 
      20           0 :         d->sysfs = strdup(sysfs);
      21           0 :         if (!d->sysfs)
      22           0 :                 return mfree(d);
      23             : 
      24           0 :         if (hashmap_put(m->devices, d->sysfs, d) < 0) {
      25           0 :                 free(d->sysfs);
      26           0 :                 return mfree(d);
      27             :         }
      28             : 
      29           0 :         d->manager = m;
      30           0 :         d->master = master;
      31           0 :         dual_timestamp_get(&d->timestamp);
      32             : 
      33           0 :         return d;
      34             : }
      35             : 
      36           0 : static void device_detach(Device *d) {
      37             :         Seat *s;
      38             :         SessionDevice *sd;
      39             : 
      40           0 :         assert(d);
      41             : 
      42           0 :         if (!d->seat)
      43           0 :                 return;
      44             : 
      45           0 :         while ((sd = d->session_devices))
      46           0 :                 session_device_free(sd);
      47             : 
      48           0 :         s = d->seat;
      49           0 :         LIST_REMOVE(devices, d->seat->devices, d);
      50           0 :         d->seat = NULL;
      51             : 
      52           0 :         if (!seat_has_master_device(s)) {
      53           0 :                 seat_add_to_gc_queue(s);
      54           0 :                 seat_send_changed(s, "CanGraphical", NULL);
      55             :         }
      56             : }
      57             : 
      58           0 : void device_free(Device *d) {
      59           0 :         assert(d);
      60             : 
      61           0 :         device_detach(d);
      62             : 
      63           0 :         hashmap_remove(d->manager->devices, d->sysfs);
      64             : 
      65           0 :         free(d->sysfs);
      66           0 :         free(d);
      67           0 : }
      68             : 
      69           0 : void device_attach(Device *d, Seat *s) {
      70             :         Device *i;
      71             :         bool had_master;
      72             : 
      73           0 :         assert(d);
      74           0 :         assert(s);
      75             : 
      76           0 :         if (d->seat == s)
      77           0 :                 return;
      78             : 
      79           0 :         if (d->seat)
      80           0 :                 device_detach(d);
      81             : 
      82           0 :         d->seat = s;
      83           0 :         had_master = seat_has_master_device(s);
      84             : 
      85             :         /* We keep the device list sorted by the "master" flag. That is, master
      86             :          * devices are at the front, other devices at the tail. As there is no
      87             :          * way to easily add devices at the list-tail, we need to iterate the
      88             :          * list to find the first non-master device when adding non-master
      89             :          * devices. We assume there is only a few (normally 1) master devices
      90             :          * per seat, so we iterate only a few times. */
      91             : 
      92           0 :         if (d->master || !s->devices)
      93           0 :                 LIST_PREPEND(devices, s->devices, d);
      94             :         else {
      95           0 :                 LIST_FOREACH(devices, i, s->devices) {
      96           0 :                         if (!i->devices_next || !i->master) {
      97           0 :                                 LIST_INSERT_AFTER(devices, s->devices, i, d);
      98           0 :                                 break;
      99             :                         }
     100             :                 }
     101             :         }
     102             : 
     103           0 :         if (!had_master && d->master && s->started) {
     104           0 :                 seat_save(s);
     105           0 :                 seat_send_changed(s, "CanGraphical", NULL);
     106             :         }
     107             : }