bsd.c

   1 /* -*- Mode: C ; c-basic-offset: 2; indent-tabs-mode: t; tab-width: 2 -*- */
   2 /*
   3  * Copyright (c) 2013-2023 Nedko Arnaudov
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  14  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  15  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <unistd.h>
  19 #include <sys/time.h>
  20 #include <sys/resource.h>
  21
  22 void closefrom(int start)
  23 {
  24         struct rlimit max_fds;
  25         rlim_t fd;
  26
  27         getrlimit(RLIMIT_NOFILE, &max_fds);
  28
  29         for (fd = start; fd < max_fds.rlim_cur; fd++)   {
  30                 close(fd);
  31         }
  32 }