text: 
  /*
   * Copyright (C) Igor Sysoev
   * Copyright (C) Nginx, Inc.
   */
  
  
  #include <ngx_config.h>
  #include <ngx_core.h>
  #include <nginx.h>
  
  
  ngx_int_t   ngx_ncpu;
  ngx_int_t   ngx_max_sockets;
  ngx_uint_t  ngx_inherited_nonblocking;
  ngx_uint_t  ngx_tcp_nodelay_and_tcp_nopush;
  
  
  struct rlimit  rlmt;
  
  
  ngx_os_io_t ngx_os_io = {
      ngx_unix_recv,
      ngx_readv_chain,
      ngx_udp_unix_recv,
      ngx_unix_send,
      ngx_udp_unix_send,
      ngx_udp_unix_sendmsg_chain,
      ngx_writev_chain,
      0
  };
  
  
  ngx_int_t
  ngx_os_init(ngx_log_t *log)
  {
      ngx_time_t  *tp;
      ngx_uint_t   n;
  
  #if (NGX_HAVE_OS_SPECIFIC_INIT)
      if (ngx_os_specific_init(log) != NGX_OK) {
          return NGX_ERROR;
      }
  #endif
  
      if (ngx_init_setproctitle(log) != NGX_OK) {
          return NGX_ERROR;
      }
  
      ngx_pagesize = getpagesize();
      ngx_cacheline_size = NGX_CPU_CACHE_LINE;
  
      for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ }
  
  #if (NGX_HAVE_SC_NPROCESSORS_ONLN)
      if (ngx_ncpu == 0) {
          ngx_ncpu = sysconf(_SC_NPROCESSORS_ONLN);
      }
  #endif
  
      if (ngx_ncpu < 1) {
          ngx_ncpu = 1;
      }
  
      ngx_cpuinfo();
  
      if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
          ngx_log_error(NGX_LOG_ALERT, log, errno,
                        "getrlimit(RLIMIT_NOFILE) failed");
          return NGX_ERROR;
      }
  
      ngx_max_sockets = (ngx_int_t) rlmt.rlim_cur;
  
  #if (NGX_HAVE_INHERITED_NONBLOCK || NGX_HAVE_ACCEPT4)
      ngx_inherited_nonblocking = 1;
  #else
      ngx_inherited_nonblocking = 0;
  #endif
  
      tp = ngx_timeofday();
      srandom(((unsigned) ngx_pid << 16) ^ tp->sec ^ tp->msec);
  
      return NGX_OK;
  }
  
  
  void
  ngx_os_status(ngx_log_t *log)
  {
      ngx_log_error(NGX_LOG_NOTICE, log, 0, NGINX_VER_BUILD);
  
  #ifdef NGX_COMPILER
      ngx_log_error(NGX_LOG_NOTICE, log, 0, "built by " NGX_COMPILER);
  #endif
  
  #if (NGX_HAVE_OS_SPECIFIC_INIT)
      ngx_os_specific_status(log);
  #endif
  
      ngx_log_error(NGX_LOG_NOTICE, log, 0,
                    "getrlimit(RLIMIT_NOFILE): %r:%r",
                    rlmt.rlim_cur, rlmt.rlim_max);
  }
  
  
  #if 0
  
  ngx_int_t
  ngx_posix_post_conf_init(ngx_log_t *log)
  {
      ngx_fd_t  pp[2];
  
      if (pipe(pp) == -1) {
          ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "pipe() failed");
          return NGX_ERROR;
      }
  
      if (dup2(pp[1], STDERR_FILENO) == -1) {
          ngx_log_error(NGX_LOG_EMERG, log, errno, "dup2(STDERR) failed");
          return NGX_ERROR;
      }
  
      if (pp[1] > STDERR_FILENO) {
          if (close(pp[1]) == -1) {
              ngx_log_error(NGX_LOG_EMERG, log, errno, "close() failed");
              return NGX_ERROR;
          }
      }
  
      return NGX_OK;
  }
  
  #endif
  