Clean up the previous commit.

svn path=/head/; revision=37888

usr.bin/time/time.1

@@ -40,7 +40,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl a Ar file
-.Op Fl f Ar file
+.Op Fl o Ar file
 .Op Fl l
 .Ar command
 .Sh DESCRIPTION
@@ -74,22 +74,14 @@ Append the output of
 to 
 .Ar file
 instead of writing to stderr.
-.It Fl f Ar file
+.It Fl o Ar file
 Write the output to 
 .Ar file
 instead of stderr.  If
 .Ar file
 exists, then 
 .Nm
-will overwrite the file if premissions permit such an operation.
-The output can be sent to stdout by giving
-a file name
-.Do
--
-.Dc
-to the 
-.Fl f
-option.
+will overwrite the file if its permissions allow it.
 .It Fl l
 The contents of the
 .Em rusage
@@ -106,6 +98,24 @@ is available as
 to
 .Xr csh
 users.
+.Sh NOTES
+The output of
+.Nm
+can be directed to standard output by specifying
+.Do
+-
+.Dc
+as the argument to the
+.Fl a
+or
+.Fl o
+option.
+.Pp
+The
+.Fl a
+and
+.Fl o
+options are mutually exclusive.
 .Sh BUGS
 The granularity of seconds on micro processors is crude and
 can result in times being reported for CPU usage which are too large by

usr.bin/time/time.c

@@ -42,7 +42,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)time.c	8.1 (Berkeley) 6/6/93";
 #endif
 static const char rcsid[] =
-	"$Id: time.c,v 1.6 1997/08/14 06:48:59 charnier Exp $";
+	"$Id: time.c,v 1.7 1998/07/24 07:19:29 phk Exp $";
 #endif /* not lint */
 
 #include <sys/types.h>
@@ -55,8 +55,9 @@ static const char rcsid[] =
 
 #include <err.h>
 #include <stdio.h>
-#include <unistd.h>
 #include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
 
 static int getstathz __P((void));
 static void usage __P((void));
@@ -70,31 +71,25 @@ main(argc, argv)
 	extern int optind;
 
 	register int pid;
-	int ch, status, lflag;
+	int ch, status, lflag, aflag = 0;
 	struct timeval before, after;
 	struct rusage ru;
-	FILE *out = NULL;
+	FILE *out = stderr;
+	char *ofn = NULL;
 
 	lflag = 0;
-	while ((ch = getopt(argc, argv, "a:f:l")) != -1)
+	while ((ch = getopt(argc, argv, "a:o:l")) != -1)
 		switch((char)ch) {
 		case 'a':
-			if (out)
-				err(1, optarg);
-			out = fopen(optarg, "a");
-			if (!out)
-				err(1, optarg);
+		        if (ofn)
+			        usage();
+			ofn = optarg;
+			aflag = 1;
 			break;
-		case 'f':
-			if (out)
-				err(1, optarg);
-			if (strcmp(optarg, "-") == 0)
-				out = stdout;
-			else {
-				out = fopen(optarg, "w");
-				if (!out)
-					err(1, optarg);
-			}
+		case 'o':
+		        if (ofn)
+			        usage();
+			ofn = optarg;
 			break;
 		case 'l':
 			lflag = 1;
@@ -108,8 +103,13 @@ main(argc, argv)
 		exit(0);
 	argv += optind;
 
-	if (!out)
-		out = stderr;
+	if (ofn) {
+	        if (strcmp(ofn, "-") == 0)
+		        out = stdout;
+		else
+		        if ((out = fopen(ofn, aflag?"a":"w")) == NULL)
+			        err(EX_IOERR, ofn);
+	}
 
 	gettimeofday(&before, (struct timezone *)NULL);
 	switch(pid = vfork()) {
@@ -187,8 +187,8 @@ main(argc, argv)
 static void
 usage()
 {
-	fprintf(stderr, "usage: time [-l] command\n");
-	exit(1);
+	fprintf(stderr, "usage: time [-l] [-{o|a} file] command\n");
+	exit(EX_USAGE);
 }
 
 /*