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phunix/include/time.h
Thomas Cort 516fec97d9 libc: add clock_settime() system call. 
This also adds the sys_settime() kernel call which allows for the adjusting
of the clock named realtime in the kernel. The existing sys_stime()
function is still needed for a separate job (setting the boottime). The
boottime is set in the readclock driver. The sys_settime() interface is
meant to be flexible and will support both clock_settime() and adjtime()
when adjtime() is implemented later.

settimeofday() was adjusted to use the clock_settime() interface.

One side note discovered during testing: uptime(1) (part of the last(1)),
uses wtmp to determine boottime (not Minix's times(2)). This leads `uptime`
to report odd results when you set the time to a time prior to boottime.
This isn't a new bug introduced by my changes. It's been there for a while.
2013-04-04 15:04:54 +02:00

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/* $NetBSD: time.h,v 1.41 2012/10/02 01:42:06 christos Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)time.h 8.3 (Berkeley) 1/21/94
*/
#ifndef _TIME_H_
#define _TIME_H_
#include <sys/cdefs.h>
#include <sys/featuretest.h>
#include <machine/ansi.h>
#include <sys/null.h>
#ifdef _BSD_CLOCK_T_
typedef _BSD_CLOCK_T_ clock_t;
#undef _BSD_CLOCK_T_
#endif
#ifdef _BSD_TIME_T_
typedef _BSD_TIME_T_ time_t;
#undef _BSD_TIME_T_
#endif
#ifdef _BSD_SIZE_T_
typedef _BSD_SIZE_T_ size_t;
#undef _BSD_SIZE_T_
#endif
#ifdef _BSD_CLOCKID_T_
typedef _BSD_CLOCKID_T_ clockid_t;
#undef _BSD_CLOCKID_T_
#endif
#ifndef __minix
#ifdef _BSD_TIMER_T_
typedef _BSD_TIMER_T_ timer_t;
#undef _BSD_TIMER_T_
#endif
#endif /* !__minix */
#ifdef __minix
#define CLOCKS_PER_SEC 60
#else
#define CLOCKS_PER_SEC 100
#endif
struct tm {
int tm_sec; /* seconds after the minute [0-61] */
int tm_min; /* minutes after the hour [0-59] */
int tm_hour; /* hours since midnight [0-23] */
int tm_mday; /* day of the month [1-31] */
int tm_mon; /* months since January [0-11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0-6] */
int tm_yday; /* days since January 1 [0-365] */
int tm_isdst; /* Daylight Savings Time flag */
long tm_gmtoff; /* offset from UTC in seconds */
__aconst char *tm_zone; /* timezone abbreviation */
};
__BEGIN_DECLS
char *asctime(const struct tm *);
clock_t clock(void);
#ifndef __LIBC12_SOURCE__
char *ctime(const time_t *) __RENAME(__ctime50);
double difftime(time_t, time_t) __RENAME(__difftime50);
struct tm *gmtime(const time_t *) __RENAME(__gmtime50);
#ifndef __MINIX
struct tm *localtime(const time_t *) __RENAME(__locatime50);
#else
struct tm *localtime(const time_t *) __RENAME(__localtime50);
#endif
time_t time(time_t *) __RENAME(__time50);
time_t mktime(struct tm *) __RENAME(__mktime50);
#endif
size_t strftime(char * __restrict, size_t, const char * __restrict,
const struct tm * __restrict)
__attribute__((__format__(__strftime__, 3, 0)));
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
defined(_NETBSD_SOURCE)
#ifndef __LIBC12_SOURCE__
/*
* CLK_TCK uses libc's internal __sysconf() to retrieve the machine's
* HZ. The value of _SC_CLK_TCK is 39 -- we hard code it so we do not
* need to include unistd.h
*/
long __sysconf(int);
#ifdef __minix
#define CLK_TCK (__sysconf(3))
#else
#define CLK_TCK (__sysconf(39))
#endif /* !__minix */
#endif
#endif
extern __aconst char *tzname[2];
#ifndef __LIBC12_SOURCE__
void tzset(void) __RENAME(__tzset50);
#endif
/*
* X/Open Portability Guide >= Issue 4
*/
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
extern int daylight;
#ifndef __LIBC12_SOURCE__
extern long int timezone __RENAME(__timezone13);
#endif
char *strptime(const char * __restrict, const char * __restrict,
struct tm * __restrict);
#endif
#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
defined(_NETBSD_SOURCE)
struct tm *getdate(const char *);
extern int getdate_err;
#endif
#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_NETBSD_SOURCE)
#include <sys/time.h> /* XXX for struct timespec */
struct sigevent;
struct itimerspec;
int clock_nanosleep(clockid_t, int, const struct timespec *, struct timespec *);
#ifndef __LIBC12_SOURCE__
int clock_getres(clockid_t, struct timespec *)
__RENAME(__clock_getres50);
int clock_gettime(clockid_t, struct timespec *)
__RENAME(__clock_gettime50);
int clock_settime(clockid_t, const struct timespec *)
__RENAME(__clock_settime50);
int nanosleep(const struct timespec *, struct timespec *)
__RENAME(__nanosleep50);
#ifndef __minix
int timer_gettime(timer_t, struct itimerspec *) __RENAME(__timer_gettime50);
int timer_settime(timer_t, int, const struct itimerspec * __restrict,
struct itimerspec * __restrict) __RENAME(__timer_settime50);
#endif /* !__minix */
#endif
#ifndef __minix
int timer_create(clockid_t, struct sigevent * __restrict,
timer_t * __restrict);
int timer_delete(timer_t);
int timer_getoverrun(timer_t);
#endif /* __minix */
#endif /* _POSIX_C_SOURCE >= 199309 || _XOPEN_SOURCE >= 500 || ... */
#if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_REENTRANT) || defined(_NETBSD_SOURCE)
char *asctime_r(const struct tm * __restrict, char * __restrict);
#ifndef __LIBC12_SOURCE__
char *ctime_r(const time_t *, char *) __RENAME(__ctime_r50);
struct tm *gmtime_r(const time_t * __restrict, struct tm * __restrict)
__RENAME(__gmtime_r50);
struct tm *localtime_r(const time_t * __restrict, struct tm * __restrict)
__RENAME(__localtime_r50);
#endif
#endif
#if defined(_NETBSD_SOURCE)
typedef struct __state *timezone_t;
#ifndef __LIBC12_SOURCE__
time_t time2posix(time_t) __RENAME(__time2posix50);
time_t posix2time(time_t) __RENAME(__posix2time50);
time_t timegm(struct tm *) __RENAME(__timegm50);
time_t timeoff(struct tm *, long) __RENAME(__timeoff50);
time_t timelocal(struct tm *) __RENAME(__timelocal50);
struct tm *offtime(const time_t *, long) __RENAME(__offtime50);
void tzsetwall(void) __RENAME(__tzsetwall50);
struct tm *offtime_r(const time_t *, long, struct tm *) __RENAME(__offtime_r50);
struct tm *localtime_rz(const timezone_t, const time_t * __restrict,
struct tm * __restrict) __RENAME(__localtime_rz50);
char *ctime_rz(const timezone_t, const time_t *, char *) __RENAME(__ctime_rz50);
time_t mktime_z(const timezone_t, struct tm *) __RENAME(__mktime_z50);
time_t timelocal_z(const timezone_t, struct tm *) __RENAME(__timelocal_z50);
time_t time2posix_z(const timezone_t, time_t) __RENAME(__time2posix_z50);
time_t posix2time_z(const timezone_t, time_t) __RENAME(__posix2time_z50);
timezone_t tzalloc(const char *) __RENAME(__tzalloc50);
void tzfree(const timezone_t) __RENAME(__tzfree50);
const char *tzgetname(const timezone_t, int) __RENAME(__tzgetname50);
#endif
size_t strftime_z(const timezone_t, char * __restrict, size_t,
const char * __restrict, const struct tm * __restrict)
__attribute__((__format__(__strftime__, 4, 0)));
#endif /* _NETBSD_SOURCE */
#ifdef __minix
int stime(time_t *_top);
#endif /* __minix */
__END_DECLS
#endif /* !_TIME_H_ */
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