text: /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
  
  /*  Fluent Bit
   *  ==========
   *  Copyright (C) 2015-2018 Treasure Data Inc.
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   */
  
  #include <fluent-bit/flb_info.h>
  #include <fluent-bit/flb_pack.h>
  #include <fluent-bit/flb_http_server.h>
  #include <fluent-bit/flb_mem.h>
  
  #define FLB_UPTIME_ONEDAY  86400
  #define FLB_UPTIME_ONEHOUR  3600
  #define FLB_UPTIME_ONEMINUTE  60
  
  /* Append human-readable uptime */
  static void uptime_hr(time_t uptime, msgpack_packer *mp_pck)
  {
      int len;
      int days;
      int hours;
      int minutes;
      int seconds;
      long int upmind;
      long int upminh;
      char buf[256];
  
      /* days */
      days = uptime / FLB_UPTIME_ONEDAY;
      upmind = uptime - (days * FLB_UPTIME_ONEDAY);
  
      /* hours */
      hours = upmind / FLB_UPTIME_ONEHOUR;
      upminh = upmind - hours * FLB_UPTIME_ONEHOUR;
  
      /* minutes */
      minutes = upminh / FLB_UPTIME_ONEMINUTE;
      seconds = upminh - minutes * FLB_UPTIME_ONEMINUTE;
  
      len = snprintf(buf, sizeof(buf) - 1,
                     "Fluent Bit has been running: "
                     " %i day%s, %i hour%s, %i minute%s and %i second%s",
                     days, (days > 1) ? "s" : "", hours,                  \
                     (hours > 1) ? "s" : "", minutes,                     \
                     (minutes > 1) ? "s" : "", seconds, \
                     (seconds > 1) ? "s" : "");
      msgpack_pack_str(mp_pck, 9);
      msgpack_pack_str_body(mp_pck, "uptime_hr", 9);
      msgpack_pack_str(mp_pck, len);
      msgpack_pack_str_body(mp_pck, buf, len);
  }
  
  /* API: List all built-in plugins */
  static void cb_uptime(mk_request_t *request, void *data)
  {
      char *out_buf;
      size_t out_size;
      time_t uptime;
      msgpack_packer mp_pck;
      msgpack_sbuffer mp_sbuf;
      struct flb_hs *hs = data;
      struct flb_config *config = hs->config;
  
      /* initialize buffers */
      msgpack_sbuffer_init(&mp_sbuf);
      msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);
  
      msgpack_pack_map(&mp_pck, 2);
      msgpack_pack_str(&mp_pck, 10);
      msgpack_pack_str_body(&mp_pck, "uptime_sec", 10);
  
      uptime = time(NULL) - config->init_time;
      msgpack_pack_uint64(&mp_pck, uptime);
  
      uptime_hr(uptime, &mp_pck);
  
      /* Export to JSON */
      flb_msgpack_raw_to_json_str(mp_sbuf.data, mp_sbuf.size,
                                  &out_buf, &out_size);
      msgpack_sbuffer_destroy(&mp_sbuf);
  
      mk_http_status(request, 200);
      mk_http_send(request, out_buf, out_size, NULL);
      mk_http_done(request);
  
      flb_free(out_buf);
  }
  
  /* Perform registration */
  int api_v1_uptime(struct flb_hs *hs)
  {
      mk_vhost_handler(hs->ctx, hs->vid, "/api/v1/uptime", cb_uptime, hs);
      return 0;
  }
  