socket.c

/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Data Differential's libhostle
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 *  Copyright (C) 2013 Data Differential, http://datadifferential.com/
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#include "gear_config.h"

#include <libhostile/function.h>
#include <libhostile/initialize.h>

#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

static int not_until= 500;

static struct function_st __function;

static pthread_once_t function_lookup_once = PTHREAD_ONCE_INIT;
static void set_local(void)
{
  __function= set_function("socket", "HOSTILE_SOCKET");
}

int socket(int domain_, int type_, int protocol_)
{

  hostile_initialize();

  (void) pthread_once(&function_lookup_once, set_local);

  if (is_called() == false && __function.frequency)
  {
    if (false)
    { }
    else if (--not_until < 0 && rand() % __function.frequency)
    {
      __function._used++;
      errno= ENFILE;
      return -1;
    }
  }

  set_called();
  int fd= __function.function.socket(domain_, type_, protocol_);
  reset_called();

  return fd;
}