1/*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2011 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#include <sys/time.h>
32#include <stdio.h>
33
34#include "config.h"
35#include "defs.h"
36
37#define UNCONST(a)		((void *)(unsigned long)(const void *)(a))
38
39#define timeval_to_double(tv) ((tv)->tv_sec * 1.0 + (tv)->tv_usec * 1.0e-6)
40#define timernorm(tvp)							\
41	do {								\
42		while ((tvp)->tv_usec >= 1000000) {			\
43			(tvp)->tv_sec++;				\
44			(tvp)->tv_usec -= 1000000;			\
45		}							\
46	} while (0 /* CONSTCOND */);
47
48#if __GNUC__ > 2 || defined(__INTEL_COMPILER)
49# define _noreturn __attribute__((__noreturn__))
50# define _packed   __attribute__((__packed__))
51# define _unused   __attribute__((__unused__))
52#else
53# define _noreturn
54# define _packed
55# define _unused
56#endif
57
58/* We don't really need this as our supported systems define __restrict
59 * automatically for us, but it is here for completeness. */
60#ifndef __restrict
61# if defined(__lint__)
62#  define __restrict
63# elif __STDC_VERSION__ >= 199901L
64#  define __restrict restrict
65# elif !(2 < __GNUC__ || (2 == __GNU_C && 95 <= __GNUC_VERSION__))
66#  define __restrict
67# endif
68#endif
69
70int set_cloexec(int);
71int set_nonblock(int);
72char *get_line(FILE * __restrict);
73extern int clock_monotonic;
74int get_monotonic(struct timeval *);
75ssize_t setvar(char ***, const char *, const char *, const char *);
76ssize_t setvard(char ***, const char *, const char *, int);
77time_t uptime(void);
78int writepid(int, pid_t);
79void *xrealloc(void *, size_t);
80void *xmalloc(size_t);
81void *xzalloc(size_t);
82char *xstrdup(const char *);
83
84/* Uncomment the #def below to send DHCPCD syslog messages to Android's logcat
85 * instead.  */
86/* #define REDIRECT_SYSLOG_TO_ANDROID_LOGCAT */
87#ifdef REDIRECT_SYSLOG_TO_ANDROID_LOGCAT
88
89#define LOG_TAG "DHCPCD"
90#include <utils/Log.h>
91
92#undef LOG_EMERG
93#undef LOG_ALERT
94#undef LOG_CRIT
95#undef LOG_ERR
96#undef LOG_WARNING
97#undef LOG_NOTICE
98#undef LOG_INFO
99#undef LOG_DEBUG
100
101#define LOG_EMERG   ANDROID_LOG_FATAL
102#define LOG_ALERT   ANDROID_LOG_FATAL
103#define LOG_CRIT    ANDROID_LOG_FATAL
104#define LOG_ERR     ANDROID_LOG_ERROR
105#define LOG_WARNING ANDROID_LOG_WARN
106#define LOG_NOTICE  ANDROID_LOG_WARN
107#define LOG_INFO    ANDROID_LOG_INFO
108#define LOG_DEBUG   ANDROID_LOG_DEBUG
109#define syslog(a, b...) android_printLog(a, LOG_TAG, b)
110
111#endif  /* REDIRECT_SYSLOG_TO_ANDROID_LOGCAT */
112
113#endif
114