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      1 /*
      2  * dhcpcd - DHCP client daemon
      3  * Copyright (c) 2006-2009 Roy Marples <roy (at) 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 <stdio.h>
     32 #include <time.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 
     70 int set_cloexec(int);
     71 int set_nonblock(int);
     72 char *get_line(FILE * __restrict);
     73 extern int clock_monotonic;
     74 int get_monotonic(struct timeval *);
     75 time_t uptime(void);
     76 int writepid(int, pid_t);
     77 void *xrealloc(void *, size_t);
     78 void *xmalloc(size_t);
     79 void *xzalloc(size_t);
     80 char *xstrdup(const char *);
     81 
     82 /* Uncomment the #def below to send DHCPCD syslog messages to Android's logcat
     83  * instead.  */
     84 /* #define REDIRECT_SYSLOG_TO_ANDROID_LOGCAT */
     85 #ifdef REDIRECT_SYSLOG_TO_ANDROID_LOGCAT
     86 
     87 #define LOG_TAG "DHCPCD"
     88 #include <utils/Log.h>
     89 
     90 #undef LOG_EMERG
     91 #undef LOG_ALERT
     92 #undef LOG_CRIT
     93 #undef LOG_ERR
     94 #undef LOG_WARNING
     95 #undef LOG_NOTICE
     96 #undef LOG_INFO
     97 #undef LOG_DEBUG
     98 
     99 #define LOG_EMERG   ANDROID_LOG_FATAL
    100 #define LOG_ALERT   ANDROID_LOG_FATAL
    101 #define LOG_CRIT    ANDROID_LOG_FATAL
    102 #define LOG_ERR     ANDROID_LOG_ERROR
    103 #define LOG_WARNING ANDROID_LOG_WARN
    104 #define LOG_NOTICE  ANDROID_LOG_WARN
    105 #define LOG_INFO    ANDROID_LOG_INFO
    106 #define LOG_DEBUG   ANDROID_LOG_DEBUG
    107 #define syslog(a, b...) android_printLog(a, LOG_TAG, b)
    108 
    109 #endif  /* REDIRECT_SYSLOG_TO_ANDROID_LOGCAT */
    110 
    111 #endif
    112