Imported Upstream version 93u+upstream

1 files changed, 74 insertions, 0 deletions

diff --git a/src/lib/libast/port/touch.c b/src/lib/libast/port/touch.c
new file mode 100644
index 0000000..c921181
--- /dev/null
+++ b/src/lib/libast/port/touch.c
@@ -0,0 +1,74 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              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);
+}