80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/****************************************************************************
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* libs/libc/time/lib_settimeofday.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/time.h>
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#include <errno.h>
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#include <nuttx/clock.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: settimeofday
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*
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* Description:
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* Set the current time
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*
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* Conforming to SVr4, 4.3BSD. POSIX.1-2001 describes gettimeofday() but
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* not settimeofday().
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*
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* NuttX implements settimeofday() as a thin layer around clock_settime();
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*
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* Input Parameters:
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* tv - The net to time to be set
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* tz - Ignored
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*
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* Returned Value:
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* Zero (OK) on success; -1 is returned on failure with the errno variable
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* set appropriately.
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*
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****************************************************************************/
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int settimeofday(FAR const struct timeval *tv, FAR const struct timezone *tz)
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{
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struct timespec ts;
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UNUSED(tz);
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#ifdef CONFIG_DEBUG_FEATURES
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if (!tv || tv->tv_usec >= USEC_PER_SEC)
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{
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set_errno(EINVAL);
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return ERROR;
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}
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#endif
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/* Convert the timeval to a timespec */
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ts.tv_sec = tv->tv_sec;
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ts.tv_nsec = tv->tv_usec * NSEC_PER_USEC;
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/* Let clock_settime do the work */
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return clock_settime(CLOCK_REALTIME, &ts);
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}
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