1/* 2 * dhcpcd - DHCP client daemon 3 * Copyright 2006-2008 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#ifndef COMMON_H 29#define COMMON_H 30 31/* string.h pulls in features.h so the below define checks work */ 32#include <sys/types.h> 33#include <sys/time.h> 34#include <stdint.h> 35#include <stdio.h> 36#include <string.h> 37 38#define UNCONST(a) ((void *)(unsigned long)(const void *)(a)) 39 40#if __GNUC__ > 2 || defined(__INTEL_COMPILER) 41# define _unused __attribute__((__unused__)) 42#else 43# define _unused 44#endif 45 46#ifndef HAVE_ARC4RANDOM 47# ifdef __GLIBC__ 48uint32_t arc4random(void); 49#else 50# define HAVE_ARC4RANDOM 51# endif 52#endif 53 54#ifndef HAVE_STRLCPY 55# define HAVE_STRLCPY 1 56#endif 57/* Only GLIBC doesn't support strlcpy */ 58#ifdef __GLIBC__ 59# if !defined(__UCLIBC__) && !defined (__dietlibc__) 60# undef HAVE_STRLCPY 61size_t strlcpy(char *, const char *, size_t); 62# endif 63#endif 64 65#ifndef HAVE_CLOSEFROM 66# if defined(__NetBSD__) || defined(__OpenBSD__) 67# define HAVE_CLOSEFROM 1 68# endif 69#endif 70#ifndef HAVE_CLOSEFROM 71int closefrom(int); 72#endif 73 74int close_fds(void); 75int set_cloexec(int); 76int set_nonblock(int); 77ssize_t get_line(char **, size_t *, FILE *); 78extern int clock_monotonic; 79int get_monotonic(struct timeval *); 80time_t uptime(void); 81int writepid(int, pid_t); 82void *xrealloc(void *, size_t); 83void *xmalloc(size_t); 84void *xzalloc(size_t); 85char *xstrdup(const char *); 86 87#endif 88