Index: usr.bin/time/time.1
===================================================================
--- usr.bin/time/time.1	(revision 286222)
+++ usr.bin/time/time.1	(working copy)
@@ -36,7 +36,7 @@
 .Nd time command execution
 .Sh SYNOPSIS
 .Nm
-.Op Fl al
+.Op Fl acl
 .Op Fl h | Fl p
 .Op Fl o Ar file
 .Ar utility Op Ar argument ...
@@ -66,6 +66,9 @@
 flag is used, append to the specified file rather than overwriting
 it.
 Otherwise, this option has no effect.
+.It Fl c
+Print time in a format that is equal to the time output of
+.Xr csh 1 
 .It Fl h
 Print times in a human friendly format.
 Times are printed in minutes, hours,
Index: usr.bin/time/time.c
===================================================================
--- usr.bin/time/time.c	(revision 286222)
+++ usr.bin/time/time.c	(working copy)
@@ -65,14 +65,14 @@
 static void siginfo(int);
 static void usage(void);
 
-static char decimal_point;
+static char decimal_point, colon;
 static struct timeval before_tv;
-static int hflag, pflag;
+static int aflag, cflag, hflag, lflag, pflag;
 
 int
 main(int argc, char **argv)
 {
-	int aflag, ch, lflag, status;
+	int ch, status;
 	int exitonsig;
 	pid_t pid;
 	struct rlimit rl;
@@ -80,16 +80,23 @@
 	struct timeval after;
 	char *ofn = NULL;
 	FILE *out = stderr;
+	int hz; 
+	u_long ticks;
 
+
 	(void) setlocale(LC_NUMERIC, "");
 	decimal_point = localeconv()->decimal_point[0];
+	colon = ':';
 
-	aflag = hflag = lflag = pflag = 0;
-	while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
+	aflag = cflag = hflag = lflag = pflag = 0;
+	while ((ch = getopt(argc, argv, "achlo:p")) != -1)
 		switch((char)ch) {
 		case 'a':
 			aflag = 1;
 			break;
+		case 'c':
+			cflag = 1;
+			break;
 		case 'h':
 			hflag = 1;
 			break;
@@ -137,19 +144,19 @@
 		warnx("command terminated abnormally");
 	exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
 	showtime(out, &before_tv, &after, &ru);
-	if (lflag) {
-		int hz = getstathz();
-		u_long ticks;
 
-		ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
+	/* get the number of ticks executed */
+	hz = getstathz();
+	ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
 		     hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
+	/*
+	 * If our round-off on the tick calculation still puts us at 0,
+	 * then always assume at least one tick.
+	 */
+	if (ticks == 0)
+		ticks = 1;
 
-		/*
-		 * If our round-off on the tick calculation still puts us at 0,
-		 * then always assume at least one tick.
-		 */
-		if (ticks == 0)
-			ticks = 1;
+	if (lflag) {
 
 		fprintf(out, "%10ld  %s\n",
 			ru.ru_maxrss, "maximum resident set size");
@@ -179,6 +186,38 @@
 			ru.ru_nvcsw, "voluntary context switches");
 		fprintf(out, "%10ld  %s\n",
 			ru.ru_nivcsw, "involuntary context switches");
+	} else if (cflag) {
+		int i;
+		/* 
+		 * csh prints:  "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww";
+		 * result in: 0.000u 0.000s 0:05.01 0.0%      0+0k 0+0io 0pf+0w 
+	 	 */
+		/* percent time spent running 
+		 * %P  The CPU percentage computed as (%U + %S) / %E.
+		 * do the math on ms.
+		 */
+		i = ((intmax_t)ru.ru_utime.tv_sec * 1000 + ru.ru_utime.tv_usec/1000
+		    + (intmax_t)ru.ru_stime.tv_sec * 1000 + ru.ru_stime.tv_usec/1000)
+		    / ((intmax_t)after.tv_sec + after.tv_usec/(1000*1000));
+		fprintf(out, "%d%c%1d%% ", i /10 , decimal_point, i % 10 );
+		/*
+		 * %X  The average amount in (shared) text space used in Kbytes.
+		 * %D  The average amount in (unshared) data/stack space  used  in
+		 * Kbytes.
+		 */
+		fprintf(out, "%ld+%ldk ", ru.ru_ixrss / ticks, (ru.ru_idrss + ru.ru_isrss) / ticks);
+		/*
+		 * %I  The number of input operations.
+		 * %O  The number of output operations.
+		 */
+		fprintf(out, "%ld+%ldio ", ru.ru_inblock, ru.ru_oublock);
+		/*
+		 * %W  Number of times the process was swapped.
+		 * %F  The number of major page faults (page needed to be  brought
+		 * from disk).
+		 */
+		fprintf(out, "%ldpf+%ldw", ru.ru_majflt, ru.ru_nswap);
+		fprintf(out, "\n");
 	}
 	/*
 	 * If the child has exited on a signal, exit on the same
@@ -202,7 +241,7 @@
 usage(void)
 {
 	fprintf(stderr,
-	    "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n");
+	    "usage: time [-acl] [-h | -p] [-o file] utility [argument ...]\n");
 	exit(1);
 }
 
@@ -276,6 +315,18 @@
 		fprintf(out, " user\t");
 		humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000);
 		fprintf(out, " sys\n");
+	} else if (cflag) {
+		fprintf(out, "%jd%c%03ldu ",
+			(intmax_t)ru->ru_utime.tv_sec, decimal_point,
+			ru->ru_utime.tv_usec/1000);
+		fprintf(out, "%jd%c%03lds ",
+			(intmax_t)ru->ru_stime.tv_sec, decimal_point,
+			ru->ru_stime.tv_usec/1000);
+		/* realtime format is min:sec.dec */
+		fprintf(out, "%jd%c%02ld%c%02ld ",
+			(intmax_t)after->tv_sec / 60, colon,
+			(intmax_t)after->tv_sec % 60, decimal_point,
+			after->tv_usec/1000);
 	} else {
 		fprintf(out, "%9jd%c%02ld real ",
 			(intmax_t)after->tv_sec, decimal_point,