diff --git a/clite/commands.js b/clite/commands.js
index 0f7c984..3927f00 100644
--- a/clite/commands.js
+++ b/clite/commands.js
@@ -37,8 +37,10 @@ clite.commands.load('ls',function(args,env,io) {
 	var dirs = [];
 	var long = false;
 	var all = false;
+	var access = false;
 	var stdlib = io.include('stdlib');
 	var stdio = io.include('stdio');
+	var time = io.include('time');
 	var clite = io.include('clite');
 	function help() {
 		stdio.printf(`
@@ -48,27 +50,42 @@ Usage: ls [OPTION] [FILE]
 Options:
 -?	Print this help information
 -l	Display data in long format
+-u	Display access time in long format
 -a	Do not ignore entries starting with .
 		`);
 	}
 
 	function writeNodeData(st,fd) {
 		if (long) {
-			var pw = stdlib.getpwuid(st.uid);
-			var gr = stdlib.getgrgid(st.gid);
-			var uname = st.uid.toString();
-			var gname = st.gid.toString();
+			var pw = stdlib.getpwuid(st.st_uid);
+			var gr = stdlib.getgrgid(st.st_gid);
+			var uname = st.st_uid.toString();
+			var gname = st.st_gid.toString();
 			if (pw)
 				uname = pw.pw_name;
 			if (gr)
 				gname = gr.gr_name;
-			if (st.type == stdio.types.FT_LINK) {
-				var d = stdio.readAll(fd);
-				if (!d)
-					d = '?';
-				stdio.printf('%s%16s%16s%16s -> %s\n',st.perms,uname,gname,st.name,d);
+			var tm;
+			var t = time.time();
+			var tmn = time.localtime(t);
+			if (access) {
+				tm = time.localtime(st.st_atim.tv_sec);
 			}else{
-				stdio.printf('%s%16s%16s%16s\n',st.perms,uname,gname,st.name);
+				tm = time.localtime(st.st_mtim.tv_sec);
+			}
+			var d = '';
+			if (tm.tm_year != tmn.tm_year) {
+				d = time.strftime('%b %d  %Y',tm);
+			}else{
+				d = time.strftime('%b %d %H:%M',tm);
+			}
+			if (st.type == stdio.types.FT_LINK) {
+				var lp = stdio.readAll(fd);
+				if (!lp)
+					lp = '?';
+				stdio.printf('%s%16s%16s%14s%16s -> %s\n',st.perms,uname,gname,d,st.name,lp);
+			}else{
+				stdio.printf('%s%16s%16s%14s%16s\n',st.perms,uname,gname,d,st.name);
 			}
 		}else{
 			stdio.printf(st.name);
@@ -86,6 +103,9 @@ Options:
 				case 'l':
 					long = true;
 					break;
+				case 'u':
+					access = true;
+					break;
 				case 'a':
 					all = true;
 					break;
@@ -1216,140 +1236,6 @@ Options:
 			//tm_wday:0,	// day of week (0-6, sunday = 0)
 			//tm_yday:0,	// day of year (0-365)
 			//tm_isdst:0	// 1 if daylight savings
-	function getDT(fmt,tm) {
-		var parts = fmt.split('%');
-		var out = '';
-		var skip = false;
-		var data = {
-			d_s:['Sun','Mon','Tue','Wed','Thu','Fri','Sat'],
-			m_s:['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
-			d_l:['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],
-			m_l:['January','February','March','April','May','June','July','August','September','October','November','December'],
-		}
-		parts.forEach(function(part,i) {
-			if (part == '') {
-				if (i != 0) {
-					out += '%';
-					skip = true;
-				}
-				return;
-			}
-			if (skip || i == 0) {
-				out += part;
-				skip = false;
-				return;
-			}
-			var o = part.substring(0,1);
-			var e = part.substring(1);
-			switch (o) {
-			case 'a':	//Locale's abbreviated weekday name.
-				out += data.d_s[tm.tm_wday];
-				break;
-			case 'A':	//Locale's full weekday name.
-				out += data.d_l[tm.tm_wday];
-				break;
-			case 'h':
-			case 'b':	//Locale's abbreviated month name.
-				out += data.m_s[tm.tm_mon];
-				break;
-			case 'B':	//Locale's full month name.
-				out += data.m_l[tm.tm_mon];
-				break;
-			case 'c':	//Locale's appropriate date and time representation.
-				out += getDT('%a %d %b %Y %H:%M:%S',tm);
-				break;
-			case 'C':	//Century (a year divided by 100 and truncated to an integer) as a decimal number [00,99].
-				var y = tm.tm_year+1900;
-				out += (y/100).toFixed(0);
-				break;
-			case 'd':	//Day of the month as a decimal number [01,31].
-				out += (tm.tm_mday+1).toFixed(0).padStart(2,'0');
-				break;
-			case 'D':	//Date in the format mm/dd/yy.
-				out += getDT('%M/%D/%y',tm);
-				break;
-			case 'e':	//Day of the month as a decimal number [1,31] in a two-digit field with leading <space> character fill.
-				out += (tm.tm_mday+1).toFixed(0).padStart(2,' ');
-				break;
-			case 'H':	//Hour (24-hour clock) as a decimal number [00,23].
-				out += (tm.tm_hour).toFixed(0).padStart(2,'0');
-				break;
-			case 'I':	//Hour (12-hour clock) as a decimal number [01,12].
-				out += (tm.tm_hour%12).toFixed(0).padStart(2,'0');
-				break;
-			case 'j':	//Day of the year as a decimal number [001,366].
-				out += (tm.tm_yday).toFixed(0).padStart(3,'0');
-				break;
-			case 'm':	//Month as a decimal number [01,12].
-				out += (tm.tm_mon+1).toFixed(0).padStart(2,'0');
-				break;
-			case 'M':	//Minute as a decimal number [00,59].
-				out += (tm.tm_min).toFixed(0).padStart(2,'0');
-				break;
-			case 'n':	//A <newline>.
-				out += '\n';
-				break;
-			case 'p':	//Locale's equivalent of either AM or PM.
-				if (tm.tm_hour >11) {
-					out += 'PM';
-				}else{
-					out += 'AM';
-				}
-				break;
-			case 'r':	//12-hour clock time [01,12] using the AM/PM notation; in the POSIX locale, this shall be equivalent to %I : %M : %S %p.
-				out += getDT('%I:%M:%S%p',tm);
-				break;
-			case 's':
-				out += time.mktime(tm).toFixed(0);
-				break;
-			case 'S':	//Seconds as a decimal number [00,60].
-				out += tm.tm_sec.toFixed(0).padStart(2,'0');
-				break;
-			case 't':	//A <tab>.
-				out += '\t';
-				break;
-			case 'T':	//24-hour clock time [00,23] in the format HH:MM:SS.
-				out += getDT('%H:%M:%S',tm);
-				break;
-			case 'u':	//Weekday as a decimal number [1,7] (1=Monday).
-				if (tm.tm_wday < 1) {
-					out += '7';
-				}else{
-					out += tm.tm_wday.toFixed(0);
-				}
-				break;
-			case 'U':	//Week of the year (Sunday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Sunday shall be considered to be in week 0.
-				// TODO: this
-				break;
-			case 'V':	//Week of the year (Monday as the first day of the week) as a decimal number [01,53]. If the week containing January 1 has four or more days in the new year, then it shall be considered week 1; otherwise, it shall be the last week of the previous year, and the next week shall be week 1.
-				// TODO: this
-				break;
-			case 'w':	//Weekday as a decimal number [0,6] (0=Sunday).
-				out += tm.tm_wday.toFixed(0);
-				break;
-			case 'W':	//Week of the year (Monday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Monday shall be considered to be in week 0.
-				// TODO: this
-				break;
-			case 'x':	//Locale's appropriate date representation.
-				out += getDT('%d/%m/%Y',tm);
-				break;
-			case 'X':	//Locale's appropriate time representation.
-				out += getDT('%H:%M:%S',tm);
-				break;
-			case 'y':	//Year within century [00,99].
-				out += (tm.tm_year+1900).toFixed(0).substring(2);
-				break;
-			case 'Y':	//Year with century as a decimal number.
-				out += (tm.tm_year+1900).toFixed(0);
-				break;
-			case 'Z':	//Timezone name, or no characters if no timezone is determinable.
-				break;
-			default:;
-			}
-			out += e;
-		});
-		return out;
-	}
 
 	function main(args) {
 		var utc = false;
@@ -1388,7 +1274,7 @@ Options:
 		if (!t)
 			return 1;
 
-		var out = getDT(format,tm);
+		var out = time.strftime(format,tm);
 		if (!out)
 			return 1;
 
@@ -1410,6 +1296,7 @@ clite.commands.load('test',function(args,env,io) {
 	stdio.printf('time is: %d\n',t);
 	var tm = time.gmtime(t);
 	stdio.printf('gmtime gives: %d %d %d %d %d %d %d %d %d\n',tm.tm_sec,tm.tm_min,tm.tm_hour,tm.tm_mday,tm.tm_mon,tm.tm_year,tm.tm_wday,tm.tm_yday,tm.tm_isdst);
+	stdio.printf('%s\n',time.ctime(t));
 	stdio.printf('Hello world\n');
 	stdio.printf('uid:%d\n',stdlib.getuid());
 	stdio.printf('%#15x:%15o:%15.5f:%0$15.5f:%%:\n',10,12,8.123456789);
diff --git a/clite/core.js b/clite/core.js
index 7388929..fa38b8d 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -10,6 +10,17 @@ var clite = {
 		// a list of library files to load
 		libs:['libclite.js','libcurses.js','libstd.js','libstdio.js','libterm.js','libtime.js']
 	},
+	time:{
+		sec:function() {
+			return parseInt(Date.now()/1000.0,10);
+		},
+		msec:function() {
+			return Date.now();
+		},
+		nsec:function() {
+			return parseInt(Date.now()*1000,10);
+		}
+	},
 	core:{
 		execSafe:function(f) {
 			try{
@@ -275,7 +286,7 @@ var clite = {
 				}
 				n.data.content = {
 					read:function() {
-						return Date.now().toString();
+						return clite.time.msec().toString();
 					},
 					write:null
 				};
@@ -1295,6 +1306,7 @@ clite.io = {
 				return false;
 			if (fd.node.data.isdev) {
 				if (typeof fd.node.data.content != 'string') {
+					fd.node.time.modify = clite.time.sec();
 					try{
 						return fd.node.data.content.write(data);
 					} catch(err) {
@@ -1315,6 +1327,7 @@ clite.io = {
 				fd.node.data.content = b+data+e;
 				fd.pos += data.length;
 			}
+			fd.node.time.modify = clite.time.sec();
 			return true;
 		}
 		clite.io.ftruncate = function(pid,fd,len) {
@@ -1325,6 +1338,7 @@ clite.io = {
 			fd.data.content = fd.data.content.substring(0,len);
 			if (fd.pos > len)
 				fd.pos = len;
+			fd.node.time.modify = clite.time.sec();
 			return true;
 		}
 		clite.io.truncate = function(pid,path,len) {
@@ -1379,14 +1393,30 @@ clite.io = {
 			var stat = Object.create({
 				name:fd.node.name,
 				type:clite.lib.getFileType(fd),
-				uid:fd.node.uid,
-				gid:fd.node.gid,
-				size:0,
+				st_dev:0,
+				st_ino:0,
+				st_mode:0,
+				st_nlink:0,
+				st_uid:fd.node.uid,
+				st_gid:fd.node.gid,
+				st_size:0,
+				st_atim:{
+					tv_sec:fd.node.time.access,
+					tv_nsec:0
+				},
+				st_mtim:{
+					tv_sec:fd.node.time.modify,
+					tv_nsec:0
+				},
+				st_ctim:{
+					tv_sec:fd.node.time.change,
+					tv_nsec:0
+				},
 				perms:fd.node.perms
 			});
 
-			if (stat.type == 1 || stat.type == 7)
-				stat.size = fd.node.data.content.length;
+			if (stat.type == clite.io.types.FT_TEXT || stat.type == clite.io.types.FT_SCRIPT)
+				stat.st_size = fd.node.data.content.length;
 
 			return stat;
 		},
@@ -1411,6 +1441,7 @@ clite.io = {
 			}else{
 				fd.node.perms = '-'+mode.substring(0);
 			}
+			fd.node.time.change = clite.time.sec();
 			return true;
 		}
 		clite.io.chmod = function(pid,path,mode) {
@@ -1899,6 +1930,11 @@ clite.vfs = {
 				uid: 0,
 				gid: 0,
 				perms:'-rw-r--r--',
+				time:{
+					access:clite.time.sec(),
+					modify:clite.time.sec(),
+					change:clite.time.sec()
+				},
 				data:{
 					remote:null,
 					isdir:false,
@@ -1945,6 +1981,7 @@ clite.vfs = {
 			}
 			if (!checkCanOpen(uid,n))
 				return null;
+			n.time.access = clite.time.sec();
 			return n;
 		}
 		vfsdata.api.getFile = function(uid,path) {
@@ -1977,6 +2014,7 @@ clite.vfs = {
 			n.uid = uid;
 			n.gid = clite.user.getGID(uid);
 			parent.data.content.push(n);
+			parent.time.modify = clite.time.sec();
 			return true;
 		}
 		vfsdata.api.mkFile = function(uid,path) {
@@ -2000,6 +2038,7 @@ clite.vfs = {
 			n.uid = uid;
 			n.gid = clite.user.getGID(uid);
 			parent.data.content.push(n);
+			parent.time.modify = clite.time.sec();
 			return true;
 		}
 		vfsdata.api.mkLink = function(uid,path,target) {
@@ -2024,6 +2063,7 @@ clite.vfs = {
 			n.uid = uid;
 			n.gid = clite.user.getGID(uid);
 			parent.data.content.push(n);
+			parent.time.modify = clite.time.sec();
 			return true;
 		}
 		vfsdata.api.mkPath = function(uid,path) {
diff --git a/clite/libtime.js b/clite/libtime.js
index 45df3ff..acb5b97 100644
--- a/clite/libtime.js
+++ b/clite/libtime.js
@@ -4,6 +4,8 @@ clite.libs.load('libtime','time',function(io,env) {
 	var data = {
 		days:['Sun','Mon','Tue','Wed','Thu','Fri','Sat'],
 		months:['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
+		days_l:['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],
+		months_l:['January','February','March','April','May','June','July','August','September','October','November','December'],
 		mdays:[31,28,31,30,31,30,31,31,30,31,30,31]
 	}
 	function getyDay(mon,mday,year) {
@@ -58,13 +60,145 @@ clite.libs.load('libtime','time',function(io,env) {
 
 		return tm;
 	}
+	function getDTStr(fmt,tm) {
+		var parts = fmt.split('%');
+		var out = '';
+		var skip = false;
+		parts.forEach(function(part,i) {
+			if (part == '') {
+				if (i != 0) {
+					out += '%';
+					skip = true;
+				}
+				return;
+			}
+			if (skip || i == 0) {
+				out += part;
+				skip = false;
+				return;
+			}
+			var o = part.substring(0,1);
+			var e = part.substring(1);
+			switch (o) {
+			case 'a':	//Locale's abbreviated weekday name.
+				out += data.days[tm.tm_wday];
+				break;
+			case 'A':	//Locale's full weekday name.
+				out += data.days_l[tm.tm_wday];
+				break;
+			case 'h':
+			case 'b':	//Locale's abbreviated month name.
+				out += data.months[tm.tm_mon];
+				break;
+			case 'B':	//Locale's full month name.
+				out += data.months_l[tm.tm_mon];
+				break;
+			case 'c':	//Locale's appropriate date and time representation.
+				out += getDTStr('%a %d %b %Y %H:%M:%S',tm);
+				break;
+			case 'C':	//Century (a year divided by 100 and truncated to an integer) as a decimal number [00,99].
+				var y = tm.tm_year+1900;
+				out += (y/100).toFixed(0);
+				break;
+			case 'd':	//Day of the month as a decimal number [01,31].
+				out += (tm.tm_mday+1).toFixed(0).padStart(2,'0');
+				break;
+			case 'D':	//Date in the format mm/dd/yy.
+				out += getDTStr('%M/%D/%y',tm);
+				break;
+			case 'e':	//Day of the month as a decimal number [1,31] in a two-digit field with leading <space> character fill.
+				out += (tm.tm_mday+1).toFixed(0).padStart(2,' ');
+				break;
+			case 'H':	//Hour (24-hour clock) as a decimal number [00,23].
+				out += (tm.tm_hour).toFixed(0).padStart(2,'0');
+				break;
+			case 'I':	//Hour (12-hour clock) as a decimal number [01,12].
+				out += (tm.tm_hour%12).toFixed(0).padStart(2,'0');
+				break;
+			case 'j':	//Day of the year as a decimal number [001,366].
+				out += (tm.tm_yday).toFixed(0).padStart(3,'0');
+				break;
+			case 'm':	//Month as a decimal number [01,12].
+				out += (tm.tm_mon+1).toFixed(0).padStart(2,'0');
+				break;
+			case 'M':	//Minute as a decimal number [00,59].
+				out += (tm.tm_min).toFixed(0).padStart(2,'0');
+				break;
+			case 'n':	//A <newline>.
+				out += '\n';
+				break;
+			case 'p':	//Locale's equivalent of either AM or PM.
+				if (tm.tm_hour >11) {
+					out += 'PM';
+				}else{
+					out += 'AM';
+				}
+				break;
+			case 'r':	//12-hour clock time [01,12] using the AM/PM notation; in the POSIX locale, this shall be equivalent to %I : %M : %S %p.
+				out += getDTStr('%I:%M:%S%p',tm);
+				break;
+			case 's':
+				out += time.mktime(tm).toFixed(0);
+				break;
+			case 'S':	//Seconds as a decimal number [00,60].
+				out += tm.tm_sec.toFixed(0).padStart(2,'0');
+				break;
+			case 't':	//A <tab>.
+				out += '\t';
+				break;
+			case 'T':	//24-hour clock time [00,23] in the format HH:MM:SS.
+				out += getDTStr('%H:%M:%S',tm);
+				break;
+			case 'u':	//Weekday as a decimal number [1,7] (1=Monday).
+				if (tm.tm_wday < 1) {
+					out += '7';
+				}else{
+					out += tm.tm_wday.toFixed(0);
+				}
+				break;
+			case 'U':	//Week of the year (Sunday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Sunday shall be considered to be in week 0.
+				// TODO: this
+				break;
+			case 'V':	//Week of the year (Monday as the first day of the week) as a decimal number [01,53]. If the week containing January 1 has four or more days in the new year, then it shall be considered week 1; otherwise, it shall be the last week of the previous year, and the next week shall be week 1.
+				// TODO: this
+				break;
+			case 'w':	//Weekday as a decimal number [0,6] (0=Sunday).
+				out += tm.tm_wday.toFixed(0);
+				break;
+			case 'W':	//Week of the year (Monday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Monday shall be considered to be in week 0.
+				// TODO: this
+				break;
+			case 'x':	//Locale's appropriate date representation.
+				out += getDTStr('%d/%m/%Y',tm);
+				break;
+			case 'X':	//Locale's appropriate time representation.
+				out += getDTStr('%H:%M:%S',tm);
+				break;
+			case 'y':	//Year within century [00,99].
+				out += (tm.tm_year+1900).toFixed(0).substring(2);
+				break;
+			case 'Y':	//Year with century as a decimal number.
+				out += (tm.tm_year+1900).toFixed(0);
+				break;
+			case 'Z':	//Timezone name, or no characters if no timezone is determinable.
+				break;
+			default:;
+			}
+			out += e;
+		});
+		return out;
+	}
 
 	//
 
 return Object.create({
 
 	asctime:function(timeptr) {
-		return data.days[timeptr.tm_wday]+' '+data.months[timeptr.tm_mon]+' '+timeptr.tm_mday+' '+timeptr.tm_hour+':'+timeptr.tm_min+':'+timeptr.tm_sec+' '+(1900+timeptr.tm_year)+'\n';
+		return getDTStr('%a %d %b %T %Y',timeptr);
+	},
+	ctime:function(time) {
+		var tm = this.localtime(time);
+		return this.asctime(tm);
 	},
 	gmtime:function(time) {
 		return genTime(time,0);
@@ -75,9 +209,12 @@ return Object.create({
 		return genTime(time,tz);
 	},
 	mktime:function(timeptr) {
-		var t = data.days[timeptr.tm_wday]+' '+data.months[timeptr.tm_mon]+' '+timeptr.tm_mday+' '+timeptr.tm_hour+':'+timeptr.tm_min+':'+timeptr.tm_sec+' '+(1900+timeptr.tm_year+' UTC');
+		var t = getDTStr('%a %d %b %T %Y %Z',timeptr);
 		return parseInt(Math.floor((new Date(t)).getTime()/1000.0).toFixed(0));
 	},
+	strftime:function(fmt,timeptr) {
+		return getDTStr(fmt,timeptr);
+	},
 	time:function() {
 		var t = readTime();
 		return parseInt(Math.floor(t/1000.0).toFixed(0)); // convert from milliseconds to seconds