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 ms_to_tv(tv, ms) \ 41 do { \ 42 (tv)->tv_sec = (ms / 1000); \ 43 (tv)->tv_usec = ((ms % 1000) * 1000); \ 44 } while (0 /* CONSTCOND */); 45#define timernorm(tvp) \ 46 do { \ 47 while ((tvp)->tv_usec >= 1000000) { \ 48 (tvp)->tv_sec++; \ 49 (tvp)->tv_usec -= 1000000; \ 50 } \ 51 } while (0 /* CONSTCOND */); 52 53#if __GNUC__ > 2 || defined(__INTEL_COMPILER) 54# define _noreturn __attribute__((__noreturn__)) 55# define _packed __attribute__((__packed__)) 56# define _unused __attribute__((__unused__)) 57#else 58# define _noreturn 59# define _packed 60# define _unused 61#endif 62 63/* We don't really need this as our supported systems define __restrict 64 * automatically for us, but it is here for completeness. */ 65#ifndef __restrict 66# if defined(__lint__) 67# define __restrict 68# elif __STDC_VERSION__ >= 199901L 69# define __restrict restrict 70# elif !(2 < __GNUC__ || (2 == __GNU_C && 95 <= __GNUC_VERSION__)) 71# define __restrict 72# endif 73#endif 74 75int set_cloexec(int); 76int set_nonblock(int); 77char *get_line(FILE * __restrict); 78extern int clock_monotonic; 79int get_monotonic(struct timeval *); 80ssize_t setvar(char ***, const char *, const char *, const char *); 81ssize_t setvard(char ***, const char *, const char *, int); 82time_t uptime(void); 83int writepid(int, pid_t); 84void *xrealloc(void *, size_t); 85void *xmalloc(size_t); 86void *xzalloc(size_t); 87char *xstrdup(const char *); 88 89#endif 90