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