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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Research
*
* touch file access and modify times of file
* if flags&PATH_TOUCH_CREATE then file will be created if it doesn't exist
* if flags&PATH_TOUCH_VERBATIM then times are taken verbatim
* times have one second granularity
*
* (time_t)(-1) retain old time
* 0 use current time
*
* the old interface flag values were:
* 1 PATH_TOUCH_CREATE
* -1 PATH_TOUCH_CREATE|PATH_TOUCH_VERBATIM
* PATH_TOUCH_VERBATIM -- not supported
*/
#include <ast.h>
#include <times.h>
#include <tv.h>
int
touch(const char* path, time_t at, time_t mt, int flags)
{
Tv_t av;
Tv_t mv;
Tv_t* ap;
Tv_t* mp;
if (at == (time_t)(-1) && !(flags & PATH_TOUCH_VERBATIM))
ap = TV_TOUCH_RETAIN;
else if (!at && !(flags & PATH_TOUCH_VERBATIM))
ap = 0;
else
{
av.tv_sec = at;
av.tv_nsec = 0;
ap = &av;
}
if (mt == (time_t)(-1) && !(flags & PATH_TOUCH_VERBATIM))
mp = TV_TOUCH_RETAIN;
else if (!mt && !(flags & PATH_TOUCH_VERBATIM))
mp = 0;
else
{
mv.tv_sec = mt;
mv.tv_nsec = 0;
mp = &mv;
}
return tvtouch(path, ap, mp, NiL, flags & 1);
}
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