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/*
* This file is Copyright (c) 2017 by the GPSD project
* SPDX-License-Identifier: BSD-2-clause
*
* This is the header for os_compat.c, which contains functions dealing with
* compatibility issues across OSes.
*/
#ifndef _GPSD_OS_COMPAT_H_
#define _GPSD_OS_COMPAT_H_
/* Determine which of these functions we need */
#include "gpsd_config.h"
# ifdef __cplusplus
extern "C" {
# endif
#ifndef HAVE_CLOCK_GETTIME
/* Simulate ANSI/POSIX clock_gettime() on platforms that don't have it */
#include <time.h>
#ifndef CLOCKID_T_DEFINED
typedef int clockid_t;
#define CLOCKID_T_DEFINED
#endif /* !CLOCKID_T_DEFINED */
/*
* OS X 10.5 and later use _STRUCT_TIMESPEC (like other OSes)
* 10.4 uses _TIMESPEC
* 10.3 and earlier use _TIMESPEC_DECLARED
*/
#if !defined(_STRUCT_TIMESPEC) && \
!defined(_TIMESPEC) && \
!defined(_TIMESPEC_DECLARED) && \
!defined(__timespec_defined)
#define _STRUCT_TIMESPEC
struct timespec {
time_t tv_sec;
long tv_nsec;
};
#endif /* !_STRUCT_TIMESPEC ... */
/* OS X does not have clock_gettime */
#define CLOCK_REALTIME 0
int clock_gettime(clockid_t, struct timespec *);
#endif /* !HAVE_CLOCK_GETTIME */
/*
* Wrapper or substitute for Linux/BSD daemon()
*
* There are some issues with this function even when it's present, so
* wrapping it confines the issues to a single place in os_compat.c.
*/
int os_daemon(int nochdir, int noclose);
#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#else
/*
* Substitutes for syslog functions
* (only subset of defines used by gpsd components listed)
*
*/
/* Copy of syslog.h defines when otherwise not available */
/* priorities (these are ordered) */
#define LOG_EMERG 0 /* system is unusable */
#define LOG_ALERT 1 /* action must be taken immediately */
#define LOG_CRIT 2 /* critical conditions */
#define LOG_ERR 3 /* error conditions */
#define LOG_WARNING 4 /* warning conditions */
#define LOG_NOTICE 5 /* normal but significant condition */
#define LOG_INFO 6 /* informational */
#define LOG_DEBUG 7 /* debug-level messages */
/* Option flags for openlog */
#define LOG_PID 0x01 /* log the pid with each message */
#define LOG_PERROR 0x20 /* log to stderr as well */
/* facility codes */
#define LOG_USER (1<<3) /* random user-level messages */
#define LOG_DAEMON (3<<3) /* system daemons */
void syslog(int priority, const char *format, ...);
void openlog(const char *__ident, int __option, int __facility);
void closelog(void);
#endif /* !HAVE_SYSLOG_H */
/* Provide BSD strlcat()/strlcpy() on platforms that don't have it */
#ifndef HAVE_STRLCAT
#include <string.h>
size_t strlcat(char *dst, const char *src, size_t size);
#endif /* !HAVE_STRLCAT */
#ifndef HAVE_STRLCPY
#include <string.h>
size_t strlcpy(char *dst, const char *src, size_t size);
#endif /* !HAVE_STRLCPY */
/* Provide missing signal numbers for non-POSIX builds */
#ifndef SIGHUP
#define SIGHUP 1
#endif
#ifndef SIGQUIT
#define SIGQUIT 3
#endif
/* Provide missing open flags for non-POSIX builds */
#ifndef O_NOCTTY
#define O_NOCTTY 0400
#endif
# ifdef __cplusplus
}
# endif
#endif /* _GPSD_OS_COMPAT_H_ */
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