git.sesse.net Git - cubemap/blob - stats.cpp

   1 #include <fcntl.h>
   2 #include <stddef.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <time.h>
   7 #include <unistd.h>
   8 #include <vector>
   9
  10 #include "client.h"
  11 #include "log.h"
  12 #include "serverpool.h"
  13 #include "stats.h"
  14 #include "util.h"
  15
  16 using namespace std;
  17
  18 extern ServerPool *servers;
  19
  20 StatsThread::StatsThread(const std::string &stats_file, int stats_interval)
  21         : stats_file(stats_file),
  22           stats_interval(stats_interval)
  23 {
  24 }
  25
  26 void StatsThread::do_work()
  27 {
  28         while (!should_stop()) {
  29                 int fd;
  30                 FILE *fp;
  31                 time_t now;
  32                 vector<ClientStats> client_stats;
  33
  34                 // Open a new, temporary file.
  35                 char *filename = strdup((stats_file + ".new.XXXXXX").c_str());
  36                 fd = mkostemp(filename, O_WRONLY);
  37                 if (fd == -1) {
  38                         log_perror(filename);
  39                         free(filename);
  40                         goto sleep;
  41                 }
  42
  43                 fp = fdopen(fd, "w");
  44                 if (fp == NULL) {
  45                         log_perror("fdopen");
  46                         safe_close(fd);
  47                         if (unlink(filename) == -1) {
  48                                 log_perror(filename);
  49                         }
  50                         free(filename);
  51                         goto sleep;
  52                 }
  53
  54                 now = time(NULL);
  55                 client_stats = servers->get_client_stats();
  56                 for (size_t i = 0; i < client_stats.size(); ++i) {
  57                         fprintf(fp, "%s %d %d %s %d %llu %llu %llu\n",
  58                                 client_stats[i].remote_addr.c_str(),
  59                                 client_stats[i].sock,
  60                                 0,  // Used to be fwmark.
  61                                 client_stats[i].url.c_str(),
  62                                 int(now - client_stats[i].connect_time),
  63                                 (long long unsigned)(client_stats[i].bytes_sent),
  64                                 (long long unsigned)(client_stats[i].bytes_lost),
  65                                 (long long unsigned)(client_stats[i].num_loss_events));
  66                 }
  67                 if (fclose(fp) == EOF) {
  68                         log_perror("fclose");
  69                         if (unlink(filename) == -1) {
  70                                 log_perror(filename);
  71                         }
  72                         free(filename);
  73                         goto sleep;
  74                 }
  75
  76                 if (rename(filename, stats_file.c_str()) == -1) {
  77                         log_perror("rename");
  78                         if (unlink(filename) == -1) {
  79                                 log_perror(filename);
  80                         }
  81                 }
  82                 free(filename);
  83
  84 sleep:
  85                 // Wait until we are asked to quit, stats_interval timeout,
  86                 // or a spurious signal. (The latter will cause us to write stats
  87                 // too often, but that's okay.)
  88                 timespec timeout_ts;
  89                 timeout_ts.tv_sec = stats_interval;
  90                 timeout_ts.tv_nsec = 0;
  91                 wait_for_wakeup(&timeout_ts);
  92         }
  93 }