src/core/dbus-timer.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include "unit.h"
  23 #include "timer.h"
  24 #include "dbus-timer.h"
  25 #include "bus-util.h"
  26 #include "strv.h"
  27
  28 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, timer_result, TimerResult);
  29
  30 static int property_get_monotonic_timers(
  31                 sd_bus *bus,
  32                 const char *path,
  33                 const char *interface,
  34                 const char *property,
  35                 sd_bus_message *reply,
  36                 void *userdata,
  37                 sd_bus_error *error) {
  38
  39         Timer *t = userdata;
  40         TimerValue *v;
  41         int r;
  42
  43         assert(bus);
  44         assert(reply);
  45         assert(t);
  46
  47         r = sd_bus_message_open_container(reply, 'a', "(stt)");
  48         if (r < 0)
  49                 return r;
  50
  51         LIST_FOREACH(value, v, t->values) {
  52                 _cleanup_free_ char *buf = NULL;
  53                 const char *s;
  54                 size_t l;
  55
  56                 if (v->base == TIMER_CALENDAR)
  57                         continue;
  58
  59                 s = timer_base_to_string(v->base);
  60                 assert(endswith(s, "Sec"));
  61
  62                 /* s/Sec/USec/ */
  63                 l = strlen(s);
  64                 buf = new(char, l+2);
  65                 if (!buf)
  66                         return -ENOMEM;
  67
  68                 memcpy(buf, s, l-3);
  69                 memcpy(buf+l-3, "USec", 5);
  70
  71                 r = sd_bus_message_append(reply, "(stt)", buf, v->value, v->next_elapse);
  72                 if (r < 0)
  73                         return r;
  74         }
  75
  76         return sd_bus_message_close_container(reply);
  77 }
  78
  79 static int property_get_calendar_timers(
  80                 sd_bus *bus,
  81                 const char *path,
  82                 const char *interface,
  83                 const char *property,
  84                 sd_bus_message *reply,
  85                 void *userdata,
  86                 sd_bus_error *error) {
  87
  88         Timer *t = userdata;
  89         TimerValue *v;
  90         int r;
  91
  92         assert(bus);
  93         assert(reply);
  94         assert(t);
  95
  96         r = sd_bus_message_open_container(reply, 'a', "(sst)");
  97         if (r < 0)
  98                 return r;
  99
 100         LIST_FOREACH(value, v, t->values) {
 101                 _cleanup_free_ char *buf = NULL;
 102
 103                 if (v->base != TIMER_CALENDAR)
 104                         continue;
 105
 106                 r = calendar_spec_to_string(v->calendar_spec, &buf);
 107                 if (r < 0)
 108                         return r;
 109
 110                 r = sd_bus_message_append(reply, "(sst)", timer_base_to_string(v->base), buf, v->next_elapse);
 111                 if (r < 0)
 112                         return r;
 113         }
 114
 115         return sd_bus_message_close_container(reply);
 116 }
 117
 118 static int property_get_unit(
 119                 sd_bus *bus,
 120                 const char *path,
 121                 const char *interface,
 122                 const char *property,
 123                 sd_bus_message *reply,
 124                 void *userdata,
 125                 sd_bus_error *error) {
 126
 127         Unit *u = userdata, *trigger;
 128
 129         assert(bus);
 130         assert(reply);
 131         assert(u);
 132
 133         trigger = UNIT_TRIGGER(u);
 134
 135         return sd_bus_message_append(reply, "s", trigger ? trigger->id : "");
 136 }
 137
 138 static int property_get_next_elapse_monotonic(
 139                 sd_bus *bus,
 140                 const char *path,
 141                 const char *interface,
 142                 const char *property,
 143                 sd_bus_message *reply,
 144                 void *userdata,
 145                 sd_bus_error *error) {
 146
 147         Timer *t = userdata;
 148         usec_t x;
 149
 150         assert(bus);
 151         assert(reply);
 152         assert(t);
 153
 154         if (t->next_elapse_monotonic_or_boottime <= 0)
 155                 x = 0;
 156         else if (t->wake_system) {
 157                 usec_t a, b;
 158
 159                 a = now(CLOCK_MONOTONIC);
 160                 b = now(CLOCK_BOOTTIME);
 161
 162                 if (t->next_elapse_monotonic_or_boottime + a > b)
 163                         x = t->next_elapse_monotonic_or_boottime + a - b;
 164                 else
 165                         x = 0;
 166         } else
 167                 x = t->next_elapse_monotonic_or_boottime;
 168
 169         return sd_bus_message_append(reply, "t", x);
 170 }
 171
 172 const sd_bus_vtable bus_timer_vtable[] = {
 173         SD_BUS_VTABLE_START(0),
 174         SD_BUS_PROPERTY("Unit", "s", property_get_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 175         SD_BUS_PROPERTY("TimersMonotonic", "a(stt)", property_get_monotonic_timers, 0, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 176         SD_BUS_PROPERTY("TimersCalendar", "a(sst)", property_get_calendar_timers, 0, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 177         SD_BUS_PROPERTY("NextElapseUSecRealtime", "t", bus_property_get_usec, offsetof(Timer, next_elapse_realtime), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 178         SD_BUS_PROPERTY("NextElapseUSecMonotonic", "t", property_get_next_elapse_monotonic, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 179         BUS_PROPERTY_DUAL_TIMESTAMP("LastTriggerUSec", offsetof(Timer, last_trigger), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 180         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Timer, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 181         SD_BUS_PROPERTY("AccuracyUSec", "t", bus_property_get_usec, offsetof(Timer, accuracy_usec), SD_BUS_VTABLE_PROPERTY_CONST),
 182         SD_BUS_PROPERTY("Persistent", "b", bus_property_get_bool, offsetof(Timer, persistent), SD_BUS_VTABLE_PROPERTY_CONST),
 183         SD_BUS_PROPERTY("WakeSystem", "b", bus_property_get_bool, offsetof(Timer, wake_system), SD_BUS_VTABLE_PROPERTY_CONST),
 184         SD_BUS_VTABLE_END
 185 };
 186
 187 static int bus_timer_set_transient_property(
 188                 Timer *t,
 189                 const char *name,
 190                 sd_bus_message *message,
 191                 UnitSetPropertiesMode mode,
 192                 sd_bus_error *error) {
 193
 194         int r;
 195
 196         assert(t);
 197         assert(name);
 198         assert(message);
 199
 200         if (STR_IN_SET(name,
 201                        "OnActiveSec",
 202                        "OnBootSec",
 203                        "OnStartupSec",
 204                        "OnUnitActiveSec",
 205                        "OnUnitInactiveSec")) {
 206
 207                 TimerValue *v;
 208                 TimerBase b = _TIMER_BASE_INVALID;
 209                 usec_t u = 0;
 210
 211                 b = timer_base_from_string(name);
 212                 if (b < 0)
 213                         return -EINVAL;
 214
 215                 r = sd_bus_message_read(message, "t", &u);
 216                 if (r < 0)
 217                         return r;
 218
 219                 if (mode != UNIT_CHECK) {
 220                         char time[FORMAT_TIMESPAN_MAX];
 221
 222                         unit_write_drop_in_private_format(UNIT(t), mode, name, "%s=%s\n", name, format_timespan(time, sizeof(time), u, USEC_PER_MSEC));
 223
 224                         v = new0(TimerValue, 1);
 225                         if (!v)
 226                                 return -ENOMEM;
 227
 228                         v->base = b;
 229                         v->value = u;
 230
 231                         LIST_PREPEND(value, t->values, v);
 232                 }
 233
 234                 return 1;
 235
 236         } else if (streq(name, "OnCalendar")) {
 237
 238                 TimerValue *v;
 239                 CalendarSpec *c = NULL;
 240                 const char *str;
 241
 242                 r = sd_bus_message_read(message, "s", &str);
 243                 if (r < 0)
 244                         return r;
 245
 246                 if (mode != UNIT_CHECK) {
 247                         r = calendar_spec_from_string(str, &c);
 248                         if (r < 0)
 249                                 return r;
 250
 251                         unit_write_drop_in_private_format(UNIT(t), mode, name, "%s=%s\n", name, str);
 252
 253                         v = new0(TimerValue, 1);
 254                         if (!v) {
 255                                 calendar_spec_free(c);
 256                                 return -ENOMEM;
 257                         }
 258
 259                         v->base = TIMER_CALENDAR;
 260                         v->calendar_spec = c;
 261
 262                         LIST_PREPEND(value, t->values, v);
 263                 }
 264
 265                 return 1;
 266
 267         } else if (streq(name, "AccuracySec")) {
 268
 269                 usec_t u = 0;
 270
 271                 r = sd_bus_message_read(message, "t", &u);
 272                 if (r < 0)
 273                         return r;
 274
 275                 if (mode != UNIT_CHECK) {
 276                         char time[FORMAT_TIMESPAN_MAX];
 277
 278                         t->accuracy_usec = u;
 279                         unit_write_drop_in_private_format(UNIT(t), mode, name, "%s=%s\n", name, format_timespan(time, sizeof(time), u, USEC_PER_MSEC));
 280                 }
 281
 282                 return 1;
 283
 284         } else if (streq(name, "WakeSystem")) {
 285
 286                 int b;
 287
 288                 r = sd_bus_message_read(message, "b", &b);
 289                 if (r < 0)
 290                         return r;
 291
 292                 if (mode != UNIT_CHECK) {
 293                         t->wake_system = b;
 294                         unit_write_drop_in_private_format(UNIT(t), mode, name, "%s=%s\n", name, yes_no(t->wake_system));
 295                 }
 296
 297                 return 1;
 298
 299         }
 300
 301         return 0;
 302 }
 303
 304 int bus_timer_set_property(
 305                 Unit *u,
 306                 const char *name,
 307                 sd_bus_message *message,
 308                 UnitSetPropertiesMode mode,
 309                 sd_bus_error *error) {
 310
 311         Timer *t = TIMER(u);
 312         int r;
 313
 314         assert(t);
 315         assert(name);
 316         assert(message);
 317
 318         if (u->transient && u->load_state == UNIT_STUB) {
 319                 r = bus_timer_set_transient_property(t, name, message, mode, error);
 320                 if (r != 0)
 321                         return r;
 322         }
 323
 324         return 0;
 325 }