1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin * *
3da2e3ebdSchin * This software is part of the ast package *
4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property *
5da2e3ebdSchin * and is licensed under the *
6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 *
77c2fbfb3SApril Chin * by AT&T Intellectual Property *
8da2e3ebdSchin * *
9da2e3ebdSchin * A copy of the License is available at *
10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html *
11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12da2e3ebdSchin * *
13da2e3ebdSchin * Information and Software Systems Research *
14da2e3ebdSchin * AT&T Research *
15da2e3ebdSchin * Florham Park NJ *
16da2e3ebdSchin * *
17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> *
18da2e3ebdSchin * David Korn <dgk@research.att.com> *
19da2e3ebdSchin * Phong Vo <kpv@research.att.com> *
20da2e3ebdSchin * *
21da2e3ebdSchin ***********************************************************************/
22da2e3ebdSchin #pragma prototyped
23da2e3ebdSchin /*
24da2e3ebdSchin * Glenn Fowler
25da2e3ebdSchin * AT&T Research
26da2e3ebdSchin *
27da2e3ebdSchin * touch file access and modify times of file
28da2e3ebdSchin * if flags&PATH_TOUCH_CREATE then file will be created if it doesn't exist
29da2e3ebdSchin * if flags&PATH_TOUCH_VERBATIM then times are taken verbatim
30da2e3ebdSchin * times have one second granularity
31da2e3ebdSchin *
32da2e3ebdSchin * (time_t)(-1) retain old time
33da2e3ebdSchin * 0 use current time
34da2e3ebdSchin *
35da2e3ebdSchin * the old interface flag values were:
36da2e3ebdSchin * 1 PATH_TOUCH_CREATE
37da2e3ebdSchin * -1 PATH_TOUCH_CREATE|PATH_TOUCH_VERBATIM
38da2e3ebdSchin * PATH_TOUCH_VERBATIM -- not supported
39da2e3ebdSchin */
40da2e3ebdSchin
41da2e3ebdSchin #include <ast.h>
42da2e3ebdSchin #include <times.h>
43da2e3ebdSchin #include <tv.h>
44da2e3ebdSchin
45da2e3ebdSchin int
touch(const char * path,time_t at,time_t mt,int flags)46da2e3ebdSchin touch(const char* path, time_t at, time_t mt, int flags)
47da2e3ebdSchin {
48da2e3ebdSchin Tv_t av;
49da2e3ebdSchin Tv_t mv;
50da2e3ebdSchin Tv_t* ap;
51da2e3ebdSchin Tv_t* mp;
52da2e3ebdSchin
53da2e3ebdSchin if (at == (time_t)(-1) && !(flags & PATH_TOUCH_VERBATIM))
54da2e3ebdSchin ap = TV_TOUCH_RETAIN;
55da2e3ebdSchin else if (!at && !(flags & PATH_TOUCH_VERBATIM))
56da2e3ebdSchin ap = 0;
57da2e3ebdSchin else
58da2e3ebdSchin {
59da2e3ebdSchin av.tv_sec = at;
60da2e3ebdSchin av.tv_nsec = 0;
61da2e3ebdSchin ap = &av;
62da2e3ebdSchin }
63da2e3ebdSchin if (mt == (time_t)(-1) && !(flags & PATH_TOUCH_VERBATIM))
64da2e3ebdSchin mp = TV_TOUCH_RETAIN;
65da2e3ebdSchin else if (!mt && !(flags & PATH_TOUCH_VERBATIM))
66da2e3ebdSchin mp = 0;
67da2e3ebdSchin else
68da2e3ebdSchin {
69da2e3ebdSchin mv.tv_sec = mt;
70da2e3ebdSchin mv.tv_nsec = 0;
71da2e3ebdSchin mp = &mv;
72da2e3ebdSchin }
73da2e3ebdSchin return tvtouch(path, ap, mp, NiL, flags & 1);
74da2e3ebdSchin }
75