1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23/*
24 * Glenn Fowler
25 * AT&T Research
26 *
27 * touch file access and modify times of file
28 * if flags&PATH_TOUCH_CREATE then file will be created if it doesn't exist
29 * if flags&PATH_TOUCH_VERBATIM then times are taken verbatim
30 * times have one second granularity
31 *
32 *	(time_t)(-1)	retain old time
33 *	0		use current time
34 *
35 * the old interface flag values were:
36 *	 1	PATH_TOUCH_CREATE
37 *	-1	PATH_TOUCH_CREATE|PATH_TOUCH_VERBATIM
38 *		PATH_TOUCH_VERBATIM -- not supported
39 */
40
41#include <ast.h>
42#include <times.h>
43#include <tv.h>
44
45int
46touch(const char* path, time_t at, time_t mt, int flags)
47{
48	Tv_t	av;
49	Tv_t	mv;
50	Tv_t*	ap;
51	Tv_t*	mp;
52
53	if (at == (time_t)(-1) && !(flags & PATH_TOUCH_VERBATIM))
54		ap = TV_TOUCH_RETAIN;
55	else if (!at && !(flags & PATH_TOUCH_VERBATIM))
56		ap = 0;
57	else
58	{
59		av.tv_sec = at;
60		av.tv_nsec = 0;
61		ap = &av;
62	}
63	if (mt == (time_t)(-1) && !(flags & PATH_TOUCH_VERBATIM))
64		mp = TV_TOUCH_RETAIN;
65	else if (!mt && !(flags & PATH_TOUCH_VERBATIM))
66		mp = 0;
67	else
68	{
69		mv.tv_sec = mt;
70		mv.tv_nsec = 0;
71		mp = &mv;
72	}
73	return tvtouch(path, ap, mp, NiL, flags & 1);
74}
75