text: /* Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.
   */
  
  /* Status Module.  Display lots of internal data about how Apache is
   * performing and the state of all children processes.
   *
   * To enable this, add the following lines into any config file:
   *
   * <Location /server-status>
   * SetHandler server-status
   * </Location>
   *
   * You may want to protect this location by password or domain so no one
   * else can look at it.  Then you can access the statistics with a URL like:
   *
   * http://your_server_name/server-status
   *
   * /server-status - Returns page using tables
   * /server-status?notable - Returns page for browsers without table support
   * /server-status?refresh - Returns page with 1 second refresh
   * /server-status?refresh=6 - Returns page with refresh every 6 seconds
   * /server-status?auto - Returns page with data for automatic parsing
   *
   * Mark Cox, mark@ukweb.com, November 1995
   *
   * 12.11.95 Initial version for www.telescope.org
   * 13.3.96  Updated to remove rprintf's [Mark]
   * 18.3.96  Added CPU usage, process information, and tidied [Ben Laurie]
   * 18.3.96  Make extra Scoreboard variables #definable
   * 25.3.96  Make short report have full precision [Ben Laurie suggested]
   * 25.3.96  Show uptime better [Mark/Ben Laurie]
   * 29.3.96  Better HTML and explanation [Mark/Rob Hartill suggested]
   * 09.4.96  Added message for non-STATUS compiled version
   * 18.4.96  Added per child and per slot counters [Jim Jagielski]
   * 01.5.96  Table format, cleanup, even more spiffy data [Chuck Murcko/Jim J.]
   * 18.5.96  Adapted to use new rprintf() routine, incidentally fixing a missing
   *          piece in short reports [Ben Laurie]
   * 21.5.96  Additional Status codes (DNS and LOGGING only enabled if
   *          extended STATUS is enabled) [George Burgyan/Jim J.]
   * 10.8.98  Allow for extended status info at runtime (no more STATUS)
   *          [Jim J.]
   */
  
  #include "httpd.h"
  #include "http_config.h"
  #include "http_core.h"
  #include "http_protocol.h"
  #include "http_main.h"
  #include "ap_mpm.h"
  #include "util_script.h"
  #include <time.h>
  #include "scoreboard.h"
  #include "http_log.h"
  #include "mod_status.h"
  #if APR_HAVE_UNISTD_H
  #include <unistd.h>
  #endif
  #define APR_WANT_STRFUNC
  #include "apr_want.h"
  #include "apr_strings.h"
  
  #define STATUS_MAXLINE 64
  
  #define KBYTE 1024
  #define MBYTE 1048576L
  #define GBYTE 1073741824L
  
  #ifndef DEFAULT_TIME_FORMAT
  #define DEFAULT_TIME_FORMAT "%A, %d-%b-%Y %H:%M:%S %Z"
  #endif
  
  #define STATUS_MAGIC_TYPE "application/x-httpd-status"
  
  module AP_MODULE_DECLARE_DATA status_module;
  
  static int server_limit, thread_limit, threads_per_child, max_servers,
             is_async;
  
  /* Implement 'ap_run_status_hook'. */
  APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ap, STATUS, int, status_hook,
                                      (request_rec *r, int flags),
                                      (r, flags),
                                      OK, DECLINED)
  
  #ifdef HAVE_TIMES
  /* ugh... need to know if we're running with a pthread implementation
   * such as linuxthreads that treats individual threads as distinct
   * processes; that affects how we add up CPU time in a process
   */
  static pid_t child_pid;
  #endif
  
  /* Format the number of bytes nicely */
  static void format_byte_out(request_rec *r, apr_off_t bytes)
  {
      if (bytes < (5 * KBYTE))
          ap_rprintf(r, "%d B", (int) bytes);
      else if (bytes < (MBYTE / 2))
          ap_rprintf(r, "%.1f kB", (float) bytes / KBYTE);
      else if (bytes < (GBYTE / 2))
          ap_rprintf(r, "%.1f MB", (float) bytes / MBYTE);
      else
          ap_rprintf(r, "%.1f GB", (float) bytes / GBYTE);
  }
  
  static void format_kbyte_out(request_rec *r, apr_off_t kbytes)
  {
      if (kbytes < KBYTE)
          ap_rprintf(r, "%d kB", (int) kbytes);
      else if (kbytes < MBYTE)
          ap_rprintf(r, "%.1f MB", (float) kbytes / KBYTE);
      else
          ap_rprintf(r, "%.1f GB", (float) kbytes / MBYTE);
  }
  
  static void show_time(request_rec *r, apr_uint32_t tsecs)
  {
      int days, hrs, mins, secs;
  
      secs = (int)(tsecs % 60);
      tsecs /= 60;
      mins = (int)(tsecs % 60);
      tsecs /= 60;
      hrs = (int)(tsecs % 24);
      days = (int)(tsecs / 24);
  
      if (days)
          ap_rprintf(r, " %d day%s", days, days == 1 ? "" : "s");
  
      if (hrs)
          ap_rprintf(r, " %d hour%s", hrs, hrs == 1 ? "" : "s");
  
      if (mins)
          ap_rprintf(r, " %d minute%s", mins, mins == 1 ? "" : "s");
  
      if (secs)
          ap_rprintf(r, " %d second%s", secs, secs == 1 ? "" : "s");
  }
  
  /* Main handler for x-httpd-status requests */
  
  /* ID values for command table */
  
  #define STAT_OPT_END     -1
  #define STAT_OPT_REFRESH  0
  #define STAT_OPT_NOTABLE  1
  #define STAT_OPT_AUTO     2
  
  struct stat_opt {
      int id;
      const char *form_data_str;
      const char *hdr_out_str;
  };
  
  static const struct stat_opt status_options[] = /* see #defines above */
  {
      {STAT_OPT_REFRESH, "refresh", "Refresh"},
      {STAT_OPT_NOTABLE, "notable", NULL},
      {STAT_OPT_AUTO, "auto", NULL},
      {STAT_OPT_END, NULL, NULL}
  };
  
  /* add another state for slots above the MaxRequestWorkers setting */
  #define SERVER_DISABLED SERVER_NUM_STATUS
  #define MOD_STATUS_NUM_STATUS (SERVER_NUM_STATUS+1)
  
  static char status_flags[MOD_STATUS_NUM_STATUS];
  
  static int status_handler(request_rec *r)
  {
      const char *loc;
      apr_time_t nowtime;
      apr_uint32_t up_time;
      ap_loadavg_t t;
      int j, i, res, written;
      int ready;
      int busy;
      unsigned long count;
      unsigned long lres, my_lres, conn_lres;
      apr_off_t bytes, my_bytes, conn_bytes;
      apr_off_t bcount, kbcount;
      long req_time;
      int short_report;
      int no_table_report;
      worker_score *ws_record;
      process_score *ps_record;
      char *stat_buffer;
      pid_t *pid_buffer, worker_pid;
      int *thread_idle_buffer = NULL;
      int *thread_busy_buffer = NULL;
      clock_t tu, ts, tcu, tcs;
      ap_generation_t mpm_generation, worker_generation;
  #ifdef HAVE_TIMES
      float tick;
      int times_per_thread;
  #endif
  
      if (strcmp(r->handler, STATUS_MAGIC_TYPE) && strcmp(r->handler,
              "server-status")) {
          return DECLINED;
      }
  
  #ifdef HAVE_TIMES
      times_per_thread = getpid() != child_pid;
  #endif
  
      ap_mpm_query(AP_MPMQ_GENERATION, &mpm_generation);
  
  #ifdef HAVE_TIMES
  #ifdef _SC_CLK_TCK
      tick = sysconf(_SC_CLK_TCK);
  #else
      tick = HZ;
  #endif
  #endif
  
      ready = 0;
      busy = 0;
      count = 0;
      bcount = 0;
      kbcount = 0;
      short_report = 0;
      no_table_report = 0;
  
      pid_buffer = apr_palloc(r->pool, server_limit * sizeof(pid_t));
      stat_buffer = apr_palloc(r->pool, server_limit * thread_limit * sizeof(char));
      if (is_async) {
          thread_idle_buffer = apr_palloc(r->pool, server_limit * sizeof(int));
          thread_busy_buffer = apr_palloc(r->pool, server_limit * sizeof(int));
      }
  
      nowtime = apr_time_now();
      tu = ts = tcu = tcs = 0;
  
      if (!ap_exists_scoreboard_image()) {
          ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01237)
                        "Server status unavailable in inetd mode");
          return HTTP_INTERNAL_SERVER_ERROR;
      }
  
      r->allowed = (AP_METHOD_BIT << M_GET);
      if (r->method_number != M_GET)
          return DECLINED;
  
      ap_set_content_type(r, "text/html; charset=ISO-8859-1");
  
      /*
       * Simple table-driven form data set parser that lets you alter the header
       */
  
      if (r->args) {
          i = 0;
          while (status_options[i].id != STAT_OPT_END) {
              if ((loc = ap_strstr_c(r->args,
                                     status_options[i].form_data_str)) != NULL) {
                  switch (status_options[i].id) {
                  case STAT_OPT_REFRESH: {
                      apr_size_t len = strlen(status_options[i].form_data_str);
                      long t = 0;
  
                      if (*(loc + len ) == '=') {
                          t = atol(loc + len + 1);
                      }
                      apr_table_setn(r->headers_out,
                                     status_options[i].hdr_out_str,
                                     apr_ltoa(r->pool, t < 1 ? 10 : t));
                      break;
                  }
                  case STAT_OPT_NOTABLE:
                      no_table_report = 1;
                      break;
                  case STAT_OPT_AUTO:
                      ap_set_content_type(r, "text/plain; charset=ISO-8859-1");
                      short_report = 1;
                      break;
                  }
              }
  
              i++;
          }
      }
  
      ws_record = apr_palloc(r->pool, sizeof *ws_record);
      
      for (i = 0; i < server_limit; ++i) {
  #ifdef HAVE_TIMES
          clock_t proc_tu = 0, proc_ts = 0, proc_tcu = 0, proc_tcs = 0;
          clock_t tmp_tu, tmp_ts, tmp_tcu, tmp_tcs;
  #endif
  
          ps_record = ap_get_scoreboard_process(i);
          if (is_async) {
              thread_idle_buffer[i] = 0;
              thread_busy_buffer[i] = 0;
          }
          for (j = 0; j < thread_limit; ++j) {
              int indx = (i * thread_limit) + j;
  
              ap_copy_scoreboard_worker(ws_record, i, j);
              res = ws_record->status;
  
              if ((i >= max_servers || j >= threads_per_child)
                  && (res == SERVER_DEAD))
                  stat_buffer[indx] = status_flags[SERVER_DISABLED];
              else
                  stat_buffer[indx] = status_flags[res];
  
              if (!ps_record->quiescing
                  && ps_record->pid) {
                  if (res == SERVER_READY) {
                      if (ps_record->generation == mpm_generation)
                          ready++;
                      if (is_async)
                          thread_idle_buffer[i]++;
                  }
                  else if (res != SERVER_DEAD &&
                           res != SERVER_STARTING &&
                           res != SERVER_IDLE_KILL) {
                      busy++;
                      if (is_async) {
                          if (res == SERVER_GRACEFUL)
                              thread_idle_buffer[i]++;
                          else
                              thread_busy_buffer[i]++;
                      }
                  }
              }
  
              /* XXX what about the counters for quiescing/seg faulted
               * processes?  should they be counted or not?  GLA
               */
              if (ap_extended_status) {
                  lres = ws_record->access_count;
                  bytes = ws_record->bytes_served;
  
                  if (lres != 0 || (res != SERVER_READY && res != SERVER_DEAD)) {
  #ifdef HAVE_TIMES
                      tmp_tu = ws_record->times.tms_utime;
                      tmp_ts = ws_record->times.tms_stime;
                      tmp_tcu = ws_record->times.tms_cutime;
                      tmp_tcs = ws_record->times.tms_cstime;
  
                      if (times_per_thread) {
                          proc_tu += tmp_tu;
                          proc_ts += tmp_ts;
                          proc_tcu += tmp_tcu;
                          proc_tcs += tmp_tcs;
                      }
                      else {
                          if (tmp_tu > proc_tu ||
                              tmp_ts > proc_ts ||
                              tmp_tcu > proc_tcu ||
                              tmp_tcs > proc_tcs) {
                              proc_tu = tmp_tu;
                              proc_ts = tmp_ts;
                              proc_tcu = tmp_tcu;
                              proc_tcs = tmp_tcs;
                          }
                      }
  #endif /* HAVE_TIMES */
  
                      count += lres;
                      bcount += bytes;
  
                      if (bcount >= KBYTE) {
                          kbcount += (bcount >> 10);
                          bcount = bcount & 0x3ff;
                      }
                  }
              }
          }
  #ifdef HAVE_TIMES
          tu += proc_tu;
          ts += proc_ts;
          tcu += proc_tcu;
          tcs += proc_tcs;
  #endif
          pid_buffer[i] = ps_record->pid;
      }
  
      /* up_time in seconds */
      up_time = (apr_uint32_t) apr_time_sec(nowtime -
                                 ap_scoreboard_image->global->restart_time);
      ap_get_loadavg(&t);
  
      if (!short_report) {
          ap_rputs(DOCTYPE_HTML_3_2
                   "<html><head>\n"
                   "<title>Apache Status</title>\n"
                   "</head><body>\n"
                   "<h1>Apache Server Status for ", r);
          ap_rvputs(r, ap_escape_html(r->pool, ap_get_server_name(r)),
                    " (via ", r->connection->local_ip,
                    ")</h1>\n\n", NULL);
          ap_rvputs(r, "<dl><dt>Server Version: ",
                    ap_get_server_description(), "</dt>\n", NULL);
          ap_rvputs(r, "<dt>Server MPM: ",
                    ap_show_mpm(), "</dt>\n", NULL);
          ap_rvputs(r, "<dt>Server Built: ",
                    ap_get_server_built(), "\n</dt></dl><hr /><dl>\n", NULL);
          ap_rvputs(r, "<dt>Current Time: ",
                    ap_ht_time(r->pool, nowtime, DEFAULT_TIME_FORMAT, 0),
                               "</dt>\n", NULL);
          ap_rvputs(r, "<dt>Restart Time: ",
                    ap_ht_time(r->pool,
                               ap_scoreboard_image->global->restart_time,
                               DEFAULT_TIME_FORMAT, 0),
                    "</dt>\n", NULL);
          ap_rprintf(r, "<dt>Parent Server Config. Generation: %d</dt>\n",
                     ap_state_query(AP_SQ_CONFIG_GEN));
          ap_rprintf(r, "<dt>Parent Server MPM Generation: %d</dt>\n",
                     (int)mpm_generation);
          ap_rputs("<dt>Server uptime: ", r);
          show_time(r, up_time);
          ap_rputs("</dt>\n", r);
          ap_rprintf(r, "<dt>Server load: %.2f %.2f %.2f</dt>\n",
                     t.loadavg, t.loadavg5, t.loadavg15);
      }
      else {
          ap_rvputs(r, ap_get_server_name(r), "\n", NULL);
          ap_rvputs(r, "ServerVersion: ",
                    ap_get_server_description(), "\n", NULL);
          ap_rvputs(r, "ServerMPM: ",
                    ap_show_mpm(), "\n", NULL);
          ap_rvputs(r, "Server Built: ",
                    ap_get_server_built(), "\n", NULL);
          ap_rvputs(r, "CurrentTime: ",
                    ap_ht_time(r->pool, nowtime, DEFAULT_TIME_FORMAT, 0),
                               "\n", NULL);
          ap_rvputs(r, "RestartTime: ",
                    ap_ht_time(r->pool,
                               ap_scoreboard_image->global->restart_time,
                               DEFAULT_TIME_FORMAT, 0),
                    "\n", NULL);
          ap_rprintf(r, "ParentServerConfigGeneration: %d\n",
                     ap_state_query(AP_SQ_CONFIG_GEN));
          ap_rprintf(r, "ParentServerMPMGeneration: %d\n",
                     (int)mpm_generation);
          ap_rprintf(r, "ServerUptimeSeconds: %u\n",
                     up_time);
          ap_rputs("ServerUptime:", r);
          show_time(r, up_time);
          ap_rputs("\n", r);
          ap_rprintf(r, "Load1: %.2f\nLoad5: %.2f\nLoad15: %.2f\n",
                     t.loadavg, t.loadavg5, t.loadavg15);
      }
  
      if (ap_extended_status) {
          if (short_report) {
              ap_rprintf(r, "Total Accesses: %lu\nTotal kBytes: %"
                         APR_OFF_T_FMT "\n",
                         count, kbcount);
  
  #ifdef HAVE_TIMES
              /* Allow for OS/2 not having CPU stats */
              ap_rprintf(r, "CPUUser: %g\nCPUSystem: %g\nCPUChildrenUser: %g\nCPUChildrenSystem: %g\n",
                         tu / tick, ts / tick, tcu / tick, tcs / tick);
  
              if (ts || tu || tcu || tcs)
                  ap_rprintf(r, "CPULoad: %g\n",
                             (tu + ts + tcu + tcs) / tick / up_time * 100.);
  #endif
  
              ap_rprintf(r, "Uptime: %ld\n", (long) (up_time));
              if (up_time > 0) {
                  ap_rprintf(r, "ReqPerSec: %g\n",
                             (float) count / (float) up_time);
  
                  ap_rprintf(r, "BytesPerSec: %g\n",
                             KBYTE * (float) kbcount / (float) up_time);
              }
              if (count > 0)
                  ap_rprintf(r, "BytesPerReq: %g\n",
                             KBYTE * (float) kbcount / (float) count);
          }
          else { /* !short_report */
              ap_rprintf(r, "<dt>Total accesses: %lu - Total Traffic: ", count);
              format_kbyte_out(r, kbcount);
              ap_rputs("</dt>\n", r);
  
  #ifdef HAVE_TIMES
              /* Allow for OS/2 not having CPU stats */
              ap_rprintf(r, "<dt>CPU Usage: u%g s%g cu%g cs%g",
                         tu / tick, ts / tick, tcu / tick, tcs / tick);
  
              if (ts || tu || tcu || tcs)
                  ap_rprintf(r, " - %.3g%% CPU load</dt>\n",
                             (tu + ts + tcu + tcs) / tick / up_time * 100.);
  #endif
  
              if (up_time > 0) {
                  ap_rprintf(r, "<dt>%.3g requests/sec - ",
                             (float) count / (float) up_time);
  
                  format_byte_out(r, (unsigned long)(KBYTE * (float) kbcount
                                                     / (float) up_time));
                  ap_rputs("/second - ", r);
              }
  
              if (count > 0) {
                  format_byte_out(r, (unsigned long)(KBYTE * (float) kbcount
                                                     / (float) count));
                  ap_rputs("/request", r);
              }
  
              ap_rputs("</dt>\n", r);
          } /* short_report */
      } /* ap_extended_status */
  
      if (!short_report)
          ap_rprintf(r, "<dt>%d requests currently being processed, "
                        "%d idle workers</dt>\n", busy, ready);
      else
          ap_rprintf(r, "BusyWorkers: %d\nIdleWorkers: %d\n", busy, ready);
  
      if (!short_report)
          ap_rputs("</dl>", r);
  
      if (is_async) {
          int write_completion = 0, lingering_close = 0, keep_alive = 0,
              connections = 0, stopping = 0, procs = 0;
          /*
           * These differ from 'busy' and 'ready' in how gracefully finishing
           * threads are counted. XXX: How to make this clear in the html?
           */
          int busy_workers = 0, idle_workers = 0;
          if (!short_report)
              ap_rputs("\n\n<table rules=\"all\" cellpadding=\"1%\">\n"
                       "<tr><th rowspan=\"2\">Slot</th>"
                           "<th rowspan=\"2\">PID</th>"
                           "<th rowspan=\"2\">Stopping</th>"
                           "<th colspan=\"2\">Connections</th>\n"
                           "<th colspan=\"2\">Threads</th>"
                           "<th colspan=\"3\">Async connections</th></tr>\n"
                       "<tr><th>total</th><th>accepting</th>"
                           "<th>busy</th><th>idle</th>"
                           "<th>writing</th><th>keep-alive</th><th>closing</th></tr>\n", r);
          for (i = 0; i < server_limit; ++i) {
              ps_record = ap_get_scoreboard_process(i);
              if (ps_record->pid) {
                  connections      += ps_record->connections;
                  write_completion += ps_record->write_completion;
                  keep_alive       += ps_record->keep_alive;
                  lingering_close  += ps_record->lingering_close;
                  busy_workers     += thread_busy_buffer[i];
                  idle_workers     += thread_idle_buffer[i];
                  if (!short_report) {
                      const char *dying = "no";
                      const char *old = "";
                      if (ps_record->quiescing) {
                          dying = "yes";
                          stopping++;
                      }
                      if (ps_record->generation != mpm_generation)
                          old = " (old gen)";
                      procs++;
                      ap_rprintf(r, "<tr><td>%u</td><td>%" APR_PID_T_FMT "</td>"
                                        "<td>%s%s</td>"
                                        "<td>%u</td><td>%s</td>"
                                        "<td>%u</td><td>%u</td>"
                                        "<td>%u</td><td>%u</td><td>%u</td>"
                                        "</tr>\n",
                                 i, ps_record->pid,
                                 dying, old,
                                 ps_record->connections,
                                 ps_record->not_accepting ? "no" : "yes",
                                 thread_busy_buffer[i],
                                 thread_idle_buffer[i],
                                 ps_record->write_completion,
                                 ps_record->keep_alive,
                                 ps_record->lingering_close);
                  }
              }
          }
          if (!short_report) {
              ap_rprintf(r, "<tr><td>Sum</td>"
                            "<td>%d</td><td>%d</td>"
                            "<td>%d</td><td>&nbsp;</td>"
                            "<td>%d</td><td>%d</td>"
                            "<td>%d</td><td>%d</td><td>%d</td>"
                            "</tr>\n</table>\n",
                            procs, stopping,
                            connections,
                            busy_workers, idle_workers,
                            write_completion, keep_alive, lingering_close);
          }
          else {
              ap_rprintf(r, "ConnsTotal: %d\n"
                            "ConnsAsyncWriting: %d\n"
                            "ConnsAsyncKeepAlive: %d\n"
                            "ConnsAsyncClosing: %d\n",
                         connections, write_completion, keep_alive,
                         lingering_close);
          }
      }
  
      /* send the scoreboard 'table' out */
      if (!short_report)
          ap_rputs("<pre>", r);
      else
          ap_rputs("Scoreboard: ", r);
  
      written = 0;
      for (i = 0; i < server_limit; ++i) {
          for (j = 0; j < thread_limit; ++j) {
              int indx = (i * thread_limit) + j;
              if (stat_buffer[indx] != status_flags[SERVER_DISABLED]) {
                  ap_rputc(stat_buffer[indx], r);
                  if ((written % STATUS_MAXLINE == (STATUS_MAXLINE - 1))
                      && !short_report)
                      ap_rputs("\n", r);
                  written++;
              }
          }
      }
  
  
      if (short_report)
          ap_rputs("\n", r);
      else {
          ap_rputs("</pre>\n"
                   "<p>Scoreboard Key:<br />\n"
                   "\"<b><code>_</code></b>\" Waiting for Connection, \n"
                   "\"<b><code>S</code></b>\" Starting up, \n"
                   "\"<b><code>R</code></b>\" Reading Request,<br />\n"
                   "\"<b><code>W</code></b>\" Sending Reply, \n"
                   "\"<b><code>K</code></b>\" Keepalive (read), \n"
                   "\"<b><code>D</code></b>\" DNS Lookup,<br />\n"
                   "\"<b><code>C</code></b>\" Closing connection, \n"
                   "\"<b><code>L</code></b>\" Logging, \n"
                   "\"<b><code>G</code></b>\" Gracefully finishing,<br /> \n"
                   "\"<b><code>I</code></b>\" Idle cleanup of worker, \n"
                   "\"<b><code>.</code></b>\" Open slot with no current process<br />\n"
                   "</p>\n", r);
          if (!ap_extended_status) {
              int j;
              int k = 0;
              ap_rputs("PID Key: <br />\n"
                       "<pre>\n", r);
              for (i = 0; i < server_limit; ++i) {
                  for (j = 0; j < thread_limit; ++j) {
                      int indx = (i * thread_limit) + j;
  
                      if (stat_buffer[indx] != '.') {
                          ap_rprintf(r, "   %" APR_PID_T_FMT
                                     " in state: %c ", pid_buffer[i],
                                     stat_buffer[indx]);
  
                          if (++k >= 3) {
                              ap_rputs("\n", r);
                              k = 0;
                          } else
                              ap_rputs(",", r);
                      }
                  }
              }
  
              ap_rputs("\n"
                       "</pre>\n", r);
          }
      }
  
      if (ap_extended_status && !short_report) {
          if (no_table_report)
              ap_rputs("<hr /><h2>Server Details</h2>\n\n", r);
          else
              ap_rputs("\n\n<table border=\"0\"><tr>"
                       "<th>Srv</th><th>PID</th><th>Acc</th>"
                       "<th>M</th>"
  #ifdef HAVE_TIMES
                       "<th>CPU\n</th>"
  #endif
                       "<th>SS</th><th>Req</th>"
                       "<th>Conn</th><th>Child</th><th>Slot</th>"
                       "<th>Client</th><th>Protocol</th><th>VHost</th>"
                       "<th>Request</th></tr>\n\n", r);
  
          for (i = 0; i < server_limit; ++i) {
              for (j = 0; j < thread_limit; ++j) {
                  ap_copy_scoreboard_worker(ws_record, i, j);
  
                  if (ws_record->access_count == 0 &&
                      (ws_record->status == SERVER_READY ||
                       ws_record->status == SERVER_DEAD)) {
                      continue;
                  }
  
                  ps_record = ap_get_scoreboard_process(i);
  
                  if (ws_record->start_time == 0L)
                      req_time = 0L;
                  else
                      req_time = (long)
                          ((ws_record->stop_time -
                            ws_record->start_time) / 1000);
                  if (req_time < 0L)
                      req_time = 0L;
  
                  lres = ws_record->access_count;
                  my_lres = ws_record->my_access_count;
                  conn_lres = ws_record->conn_count;
                  bytes = ws_record->bytes_served;
                  my_bytes = ws_record->my_bytes_served;
                  conn_bytes = ws_record->conn_bytes;
                  if (ws_record->pid) { /* MPM sets per-worker pid and generation */
                      worker_pid = ws_record->pid;
                      worker_generation = ws_record->generation;
                  }
                  else {
                      worker_pid = ps_record->pid;
                      worker_generation = ps_record->generation;
                  }
  
                  if (no_table_report) {
                      if (ws_record->status == SERVER_DEAD)
                          ap_rprintf(r,
                                     "<b>Server %d-%d</b> (-): %d|%lu|%lu [",
                                     i, (int)worker_generation,
                                     (int)conn_lres, my_lres, lres);
                      else
                          ap_rprintf(r,
                                     "<b>Server %d-%d</b> (%"
                                     APR_PID_T_FMT "): %d|%lu|%lu [",
                                     i, (int) worker_generation,
                                     worker_pid,
                                     (int)conn_lres, my_lres, lres);
  
                      switch (ws_record->status) {
                      case SERVER_READY:
                          ap_rputs("Ready", r);
                          break;
                      case SERVER_STARTING:
                          ap_rputs("Starting", r);
                          break;
                      case SERVER_BUSY_READ:
                          ap_rputs("<b>Read</b>", r);
                          break;
                      case SERVER_BUSY_WRITE:
                          ap_rputs("<b>Write</b>", r);
                          break;
                      case SERVER_BUSY_KEEPALIVE:
                          ap_rputs("<b>Keepalive</b>", r);
                          break;
                      case SERVER_BUSY_LOG:
                          ap_rputs("<b>Logging</b>", r);
                          break;
                      case SERVER_BUSY_DNS:
                          ap_rputs("<b>DNS lookup</b>", r);
                          break;
                      case SERVER_CLOSING:
                          ap_rputs("<b>Closing</b>", r);
                          break;
                      case SERVER_DEAD:
                          ap_rputs("Dead", r);
                          break;
                      case SERVER_GRACEFUL:
                          ap_rputs("Graceful", r);
                          break;
                      case SERVER_IDLE_KILL:
                          ap_rputs("Dying", r);
                          break;
                      default:
                          ap_rputs("?STATE?", r);
                          break;
                      }
  
                      ap_rprintf(r, "] "
  #ifdef HAVE_TIMES
                                 "u%g s%g cu%g cs%g"
  #endif
                                 "\n %ld %ld (",
  #ifdef HAVE_TIMES
                                 ws_record->times.tms_utime / tick,
                                 ws_record->times.tms_stime / tick,
                                 ws_record->times.tms_cutime / tick,
                                 ws_record->times.tms_cstime / tick,
  #endif
                                 (long)apr_time_sec(nowtime -
                                                    ws_record->last_used),
                                 (long) req_time);
  
                      format_byte_out(r, conn_bytes);
                      ap_rputs("|", r);
                      format_byte_out(r, my_bytes);
                      ap_rputs("|", r);
                      format_byte_out(r, bytes);
                      ap_rputs(")\n", r);
                      ap_rprintf(r,
                                 " <i>%s {%s}</i> <i>(%s)</i> <b>[%s]</b><br />\n\n",
                                 ap_escape_html(r->pool,
                                                ws_record->client),
                                 ap_escape_html(r->pool,
                                                ap_escape_logitem(r->pool,
                                                                  ws_record->request)),
                                 ap_escape_html(r->pool,
                                                ws_record->protocol),
                                 ap_escape_html(r->pool,
                                                ws_record->vhost));
                  }
                  else { /* !no_table_report */
                      if (ws_record->status == SERVER_DEAD)
                          ap_rprintf(r,
                                     "<tr><td><b>%d-%d</b></td><td>-</td><td>%d/%lu/%lu",
                                     i, (int)worker_generation,
                                     (int)conn_lres, my_lres, lres);
                      else
                          ap_rprintf(r,
                                     "<tr><td><b>%d-%d</b></td><td>%"
                                     APR_PID_T_FMT
                                     "</td><td>%d/%lu/%lu",
                                     i, (int)worker_generation,
                                     worker_pid,
                                     (int)conn_lres,
                                     my_lres, lres);
  
                      switch (ws_record->status) {
                      case SERVER_READY:
                          ap_rputs("</td><td>_", r);
                          break;
                      case SERVER_STARTING:
                          ap_rputs("</td><td><b>S</b>", r);
                          break;
                      case SERVER_BUSY_READ:
                          ap_rputs("</td><td><b>R</b>", r);
                          break;
                      case SERVER_BUSY_WRITE:
                          ap_rputs("</td><td><b>W</b>", r);
                          break;
                      case SERVER_BUSY_KEEPALIVE:
                          ap_rputs("</td><td><b>K</b>", r);
                          break;
                      case SERVER_BUSY_LOG:
                          ap_rputs("</td><td><b>L</b>", r);
                          break;
                      case SERVER_BUSY_DNS:
                          ap_rputs("</td><td><b>D</b>", r);
                          break;
                      case SERVER_CLOSING:
                          ap_rputs("</td><td><b>C</b>", r);
                          break;
                      case SERVER_DEAD:
                          ap_rputs("</td><td>.", r);
                          break;
                      case SERVER_GRACEFUL:
                          ap_rputs("</td><td>G", r);
                          break;
                      case SERVER_IDLE_KILL:
                          ap_rputs("</td><td>I", r);
                          break;
                      default:
                          ap_rputs("</td><td>?", r);
                          break;
                      }
  
                      ap_rprintf(r,
                                 "\n</td>"
  #ifdef HAVE_TIMES
                                 "<td>%.2f</td>"
  #endif
                                 "<td>%ld</td><td>%ld",
  #ifdef HAVE_TIMES
                                 (ws_record->times.tms_utime +
                                  ws_record->times.tms_stime +
                                  ws_record->times.tms_cutime +
                                  ws_record->times.tms_cstime) / tick,
  #endif
                                 (long)apr_time_sec(nowtime -
                                                    ws_record->last_used),
                                 (long)req_time);
  
                      ap_rprintf(r, "</td><td>%-1.1f</td><td>%-2.2f</td><td>%-2.2f\n",
                                 (float)conn_bytes / KBYTE, (float) my_bytes / MBYTE,
                                 (float)bytes / MBYTE);
  
                      ap_rprintf(r, "</td><td>%s</td><td>%s</td><td nowrap>%s</td>"
                                    "<td nowrap>%s</td></tr>\n\n",
                                 ap_escape_html(r->pool,
                                                ws_record->client),
                                 ap_escape_html(r->pool,
                                                ws_record->protocol),
                                 ap_escape_html(r->pool,
                                                ws_record->vhost),
                                 ap_escape_html(r->pool,
                                                ap_escape_logitem(r->pool,
                                                        ws_record->request)));
                  } /* no_table_report */
              } /* for (j...) */
          } /* for (i...) */
  
          if (!no_table_report) {
              ap_rputs("</table>\n \
  <hr /> \
  <table>\n \
  <tr><th>Srv</th><td>Child Server number - generation</td></tr>\n \
  <tr><th>PID</th><td>OS process ID</td></tr>\n \
  <tr><th>Acc</th><td>Number of accesses this connection / this child / this slot</td></tr>\n \
  <tr><th>M</th><td>Mode of operation</td></tr>\n"
  
  #ifdef HAVE_TIMES
  "<tr><th>CPU</th><td>CPU usage, number of seconds</td></tr>\n"
  #endif
  
  "<tr><th>SS</th><td>Seconds since beginning of most recent request</td></tr>\n \
  <tr><th>Req</th><td>Milliseconds required to process most recent request</td></tr>\n \
  <tr><th>Conn</th><td>Kilobytes transferred this connection</td></tr>\n \
  <tr><th>Child</th><td>Megabytes transferred this child</td></tr>\n \
  <tr><th>Slot</th><td>Total megabytes transferred this slot</td></tr>\n \
  </table>\n", r);
          }
      } /* if (ap_extended_status && !short_report) */
      else {
  
          if (!short_report) {
              ap_rputs("<hr />To obtain a full report with current status "
                       "information you need to use the "
                       "<code>ExtendedStatus On</code> directive.\n", r);
          }
      }
  
      {
          /* Run extension hooks to insert extra content. */
          int flags =
              (short_report ? AP_STATUS_SHORT : 0) |
              (no_table_report ? AP_STATUS_NOTABLE : 0) |
              (ap_extended_status ? AP_STATUS_EXTENDED : 0);
  
          ap_run_status_hook(r, flags);
      }
  
      if (!short_report) {
          ap_rputs(ap_psignature("<hr />\n",r), r);
          ap_rputs("</body></html>\n", r);
      }
  
      return 0;
  }
  
  static int status_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
  {
      /* When mod_status is loaded, default our ExtendedStatus to 'on'
       * other modules which prefer verbose scoreboards may play a similar game.
       * If left to their own requirements, mpm modules can make do with simple
       * scoreboard entries.
       */
      ap_extended_status = 1;
      return OK;
  }
  
  static int status_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp,
                         server_rec *s)
  {
      status_flags[SERVER_DEAD] = '.';  /* We don't want to assume these are in */
      status_flags[SERVER_READY] = '_'; /* any particular order in scoreboard.h */
      status_flags[SERVER_STARTING] = 'S';
      status_flags[SERVER_BUSY_READ] = 'R';
      status_flags[SERVER_BUSY_WRITE] = 'W';
      status_flags[SERVER_BUSY_KEEPALIVE] = 'K';
      status_flags[SERVER_BUSY_LOG] = 'L';
      status_flags[SERVER_BUSY_DNS] = 'D';
      status_flags[SERVER_CLOSING] = 'C';
      status_flags[SERVER_GRACEFUL] = 'G';
      status_flags[SERVER_IDLE_KILL] = 'I';
      status_flags[SERVER_DISABLED] = ' ';
      ap_mpm_query(AP_MPMQ_HARD_LIMIT_THREADS, &thread_limit);
      ap_mpm_query(AP_MPMQ_HARD_LIMIT_DAEMONS, &server_limit);
      ap_mpm_query(AP_MPMQ_MAX_THREADS, &threads_per_child);
      /* work around buggy MPMs */
      if (threads_per_child == 0)
          threads_per_child = 1;
      ap_mpm_query(AP_MPMQ_MAX_DAEMONS, &max_servers);
      ap_mpm_query(AP_MPMQ_IS_ASYNC, &is_async);
      return OK;
  }
  
  #ifdef HAVE_TIMES
  static void status_child_init(apr_pool_t *p, server_rec *s)
  {
      child_pid = getpid();
  }
  #endif
  
  static void register_hooks(apr_pool_t *p)
  {
      ap_hook_handler(status_handler, NULL, NULL, APR_HOOK_MIDDLE);
      ap_hook_pre_config(status_pre_config, NULL, NULL, APR_HOOK_LAST);
      ap_hook_post_config(status_init, NULL, NULL, APR_HOOK_MIDDLE);
  #ifdef HAVE_TIMES
      ap_hook_child_init(status_child_init, NULL, NULL, APR_HOOK_MIDDLE);
  #endif
  }
  
  AP_DECLARE_MODULE(status) =
  {
      STANDARD20_MODULE_STUFF,
      NULL,                       /* dir config creater */
      NULL,                       /* dir merger --- default is to override */
      NULL,                       /* server config */
      NULL,                       /* merge server config */
      NULL,                       /* command table */
      register_hooks              /* register_hooks */
  };
  