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a34940a975
The old timezone(3) function has long since been obsolete and has a fatally flawed interface. Retain this function for compatibility purposes, but shift to providing the offset from UTC in the timezone variable, whether or not the timezone observes summer time in the 'daylight' variable. Document the tzname variable that's already been set. Also make _tztab() static. It's not used in libc (or anywhere in the tree) and it's not exported as a public dynamic symbol. Sponsored by: Netflix Reviewed by: brooks, kib Differential Revision: https://reviews.freebsd.org/D44281
198 lines
6.1 KiB
C
198 lines
6.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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*/
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#ifndef _TIME_H_
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#define _TIME_H_
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#include <sys/cdefs.h>
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#include <sys/_null.h>
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#include <sys/_types.h>
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#include <sys/_clock_id.h>
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#if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
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/*
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* Frequency of the clock ticks reported by times(). Deprecated - use
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* sysconf(_SC_CLK_TCK) instead. (Removed in 1003.1-2001.)
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*/
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#define CLK_TCK 128
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#endif
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/* Frequency of the clock ticks reported by clock(). */
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#define CLOCKS_PER_SEC 128
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#ifndef _CLOCK_T_DECLARED
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typedef __clock_t clock_t;
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#define _CLOCK_T_DECLARED
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#endif
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#ifndef _TIME_T_DECLARED
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typedef __time_t time_t;
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#define _TIME_T_DECLARED
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#endif
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#ifndef _SIZE_T_DECLARED
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typedef __size_t size_t;
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#define _SIZE_T_DECLARED
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#endif
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#if __POSIX_VISIBLE >= 199309
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/*
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* New in POSIX 1003.1b-1993.
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*/
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#ifndef _CLOCKID_T_DECLARED
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typedef __clockid_t clockid_t;
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#define _CLOCKID_T_DECLARED
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#endif
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#ifndef _TIMER_T_DECLARED
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typedef __timer_t timer_t;
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#define _TIMER_T_DECLARED
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#endif
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#include <sys/timespec.h>
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#endif /* __POSIX_VISIBLE >= 199309 */
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#if __POSIX_VISIBLE >= 200112
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#ifndef _PID_T_DECLARED
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typedef __pid_t pid_t;
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#define _PID_T_DECLARED
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#endif
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#endif
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struct tm {
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int tm_sec; /* seconds after the minute [0-60] */
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int tm_min; /* minutes after the hour [0-59] */
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int tm_hour; /* hours since midnight [0-23] */
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int tm_mday; /* day of the month [1-31] */
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int tm_mon; /* months since January [0-11] */
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int tm_year; /* years since 1900 */
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int tm_wday; /* days since Sunday [0-6] */
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int tm_yday; /* days since January 1 [0-365] */
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int tm_isdst; /* Daylight Savings Time flag */
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long tm_gmtoff; /* offset from UTC in seconds */
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char *tm_zone; /* timezone abbreviation */
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};
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#if __POSIX_VISIBLE
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extern char *tzname[];
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#endif
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__BEGIN_DECLS
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char *asctime(const struct tm *);
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clock_t clock(void);
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char *ctime(const time_t *);
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#ifndef _STANDALONE
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double difftime(time_t, time_t);
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#endif
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/* XXX missing: getdate() */
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struct tm *gmtime(const time_t *);
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struct tm *localtime(const time_t *);
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time_t mktime(struct tm *);
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size_t strftime(char * __restrict, size_t, const char * __restrict,
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const struct tm * __restrict);
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time_t time(time_t *);
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#if __POSIX_VISIBLE >= 200112
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struct sigevent;
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int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict);
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int timer_delete(timer_t);
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int timer_gettime(timer_t, struct itimerspec *);
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int timer_getoverrun(timer_t);
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int timer_settime(timer_t, int, const struct itimerspec *__restrict,
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struct itimerspec *__restrict);
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#endif
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#if __POSIX_VISIBLE
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void tzset(void);
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#endif
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#if __POSIX_VISIBLE >= 199309
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int clock_getres(clockid_t, struct timespec *);
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int clock_gettime(clockid_t, struct timespec *);
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int clock_settime(clockid_t, const struct timespec *);
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int nanosleep(const struct timespec *, struct timespec *);
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#endif /* __POSIX_VISIBLE >= 199309 */
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#if __POSIX_VISIBLE >= 200112
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int clock_getcpuclockid(pid_t, clockid_t *);
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int clock_nanosleep(clockid_t, int, const struct timespec *, struct timespec *);
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#endif
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#if __POSIX_VISIBLE >= 199506
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char *asctime_r(const struct tm *, char *);
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char *ctime_r(const time_t *, char *);
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struct tm *gmtime_r(const time_t *, struct tm *);
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struct tm *localtime_r(const time_t *, struct tm *);
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#endif
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#if __XSI_VISIBLE
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char *strptime(const char * __restrict, const char * __restrict,
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struct tm * __restrict);
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extern long timezone;
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extern int daylight;
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#endif
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#if __BSD_VISIBLE
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time_t timelocal(struct tm * const);
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time_t timegm(struct tm * const);
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int timer_oshandle_np(timer_t timerid);
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time_t time2posix(time_t t);
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time_t posix2time(time_t t);
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#endif /* __BSD_VISIBLE */
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#if __POSIX_VISIBLE >= 200809 || defined(_XLOCALE_H_)
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#include <xlocale/_time.h>
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#endif
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#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 2011 || \
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(defined(__cplusplus) && __cplusplus >= 201703)
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#include <sys/_timespec.h>
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/* ISO/IEC 9899:2011 7.27.2.5 The timespec_get function */
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#define TIME_UTC 1 /* time elapsed since epoch */
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int timespec_get(struct timespec *ts, int base);
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#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 2023
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/* ISO/IEC 9899:2024 7.29.1 Components of time */
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#define TIME_MONOTONIC 2 /* monotonic time */
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/* ISO/IEC 9899:2024 7.29.2.7 The timespec_getres function */
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int timespec_getres(struct timespec *, int);
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#endif
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#endif
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__END_DECLS
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#endif /* !_TIME_H_ */
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