src/logd/src/liblogd/logd.c

   1 #define _GNU_SOURCE
   2
   3 #include <assert.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <systemd/sd-journal.h>
   7 #include "core/log.h"
   8 #include "logd.h"
   9 #include "macro.h"
  10
  11 #define ADD_ACTION_STR(action, str) [action]=str
  12
  13 #define GET_ACTION_STR(table, action) table[action]
  14 /*
  15  * If you want add action,
  16  * you must add string of each action
  17  * using ADD_ACTION_STR macro.
  18  */
  19 static const char *action_string[LOGD_ACTION_MAX] = {
  20         ADD_ACTION_STR(LOGD_NONE_ACTION, "none"),
  21         ADD_ACTION_STR(LOGD_ON, "on"),
  22         ADD_ACTION_STR(LOGD_START, "start"),
  23         ADD_ACTION_STR(LOGD_CONTINUE, "continue"),
  24         ADD_ACTION_STR(LOGD_STOP, "stop"),
  25         ADD_ACTION_STR(LOGD_OFF, "off"),
  26         ADD_ACTION_STR(LOGD_CHANGED, "changed"),
  27 };
  28
  29 static const char *get_value(enum logd_object object,
  30          enum logd_action action, ...)
  31 {
  32         char *text = NULL;
  33         va_list vl;
  34
  35         va_start(vl, action);
  36
  37         switch (object | LOGD_SHIFT_ACTION(action)) {
  38         case LOGD_BATTERY_SOC | LOGD_SHIFT_ACTION(LOGD_CHANGED):
  39         case LOGD_DISPLAY | LOGD_SHIFT_ACTION(LOGD_CHANGED):
  40         case LOGD_POWER_MODE | LOGD_SHIFT_ACTION(LOGD_CHANGED):
  41                 if (vasprintf(&text, "%d", vl) < 0)
  42                         goto error;
  43                 break;
  44         case LOGD_FOREGRD_APP | LOGD_SHIFT_ACTION(LOGD_CHANGED):
  45                 if (vasprintf(&text, "%s", vl) < 0)
  46                         goto error;
  47                 break;
  48         default:
  49                 /*
  50                  * we already have defined the string of each action
  51                  * as it is initialized.
  52                  * we check avaliable of action and object here.
  53                  * GET_ACTION_STR will return the string
  54                  * which is proper of action.
  55                  */
  56                 if (action < LOGD_ACTION_MAX && object < LOGD_OBJECT_MAX) {
  57                         text = strdup(GET_ACTION_STR(action_string, action));
  58                         break;
  59                 }
  60                 _E("invalid logd_object or logd_action: %d, %d", object, action);
  61                 goto error;
  62         }
  63         va_end(vl);
  64         return text;
  65
  66 error:
  67         va_end(vl);
  68         return NULL;
  69 }
  70
  71 API int logd_event(enum logd_object object, enum logd_action action, ...)
  72 {
  73         va_list vl;
  74         const char *message = NULL;
  75         int ret;
  76
  77         va_start(vl, action);
  78         message = get_value(object, action);
  79         if (!message) {
  80                 va_end(vl);
  81                 return LOGD_ERROR_INVALID_PARAM;
  82         }
  83         va_end(vl);
  84
  85         ret = sd_journal_send("LOGD_EVENT_TYPE=%d",
  86         object | LOGD_SHIFT_ACTION(action), "MESSAGE=%s", message, NULL);
  87         free((void *) message);
  88
  89         return ret < 0 ? LOGD_ERROR_SDJOURNAL : LOGD_ERROR_OK;
  90 }