1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 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 45 int 46 touch(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