Add a new switch -h for interface stats mode, which prints all interface

statistics in human readable form.

In collaboration with:	vsevolod
Reviewed by:		cperciva

usr.bin/netstat/if.c

@@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
 
 #include <err.h>
 #include <errno.h>
+#include <libutil.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -175,18 +176,28 @@ show_stat(const char *fmt, int width, u_long value, short showvalue)
 {
 	char newfmt[32];
 
-	/* Construct the format string */
-	if (showvalue) {
-		sprintf(newfmt, "%%%d%s", width, fmt);
-		printf(newfmt, value);
-	} else {
+	if (showvalue == 0) {
+		/* Print just dash. */
 		sprintf(newfmt, "%%%ds", width);
 		printf(newfmt, "-");
+		return;
+	}
+
+	if (hflag) {
+		char buf[5];
+
+		/* Format in human readable form. */
+		humanize_number(buf, sizeof(buf), (int64_t)value, "",
+		    HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL);
+		sprintf(newfmt, "%%%ds", width);
+		printf(newfmt, buf);
+	} else {
+		/* Construct the format string. */
+		sprintf(newfmt, "%%%d%s", width, fmt);
+		printf(newfmt, value);
 	}
 }
 
-
-
 /*
  * Print a description of the network interfaces.
  */

usr.bin/netstat/main.c

@@ -273,6 +273,7 @@ int	aflag;		/* show all sockets (including servers) */
 int	bflag;		/* show i/f total bytes in/out */
 int	dflag;		/* show i/f dropped packets */
 int	gflag;		/* show group (multicast) routing or stats */
+int	hflag;		/* show counters in human readable format */
 int	iflag;		/* show interfaces */
 int	Lflag;		/* show size of listen queues */
 int	mflag;		/* show memory stats */
@@ -300,7 +301,7 @@ main(int argc, char *argv[])
 
 	af = AF_UNSPEC;
 
-	while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:np:rSstuWw:z")) != -1)
+	while ((ch = getopt(argc, argv, "Aabdf:ghI:iLlM:mN:np:rSstuWw:z")) != -1)
 		switch(ch) {
 		case 'A':
 			Aflag = 1;
@@ -343,6 +344,9 @@ main(int argc, char *argv[])
 		case 'g':
 			gflag = 1;
 			break;
+		case 'h':
+			hflag = 1;
+			break;
 		case 'I': {
 			char *cp;
 
@@ -698,7 +702,7 @@ usage(void)
 	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
 "usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n"
 "               [-M core] [-N system]",
-"       netstat -i | -I interface [-abdnt] [-f address_family]\n"
+"       netstat -i | -I interface [-abdhnt] [-f address_family]\n"
 "               [-M core] [-N system]",
 "       netstat -w wait [-I interface] [-d] [-M core] [-N system]",
 "       netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",

usr.bin/netstat/netstat.1

@@ -32,7 +32,7 @@
 .\"	@(#)netstat.1	8.8 (Berkeley) 4/18/94
 .\" $FreeBSD$
 .\"
-.Dd March 25, 2004
+.Dd August 19, 2005
 .Dt NETSTAT 1
 .Os
 .Sh NAME
@@ -89,7 +89,7 @@ but show ports symbolically.
 .Bk -words
 .Nm
 .Fl i | I Ar interface
-.Op Fl abdnt
+.Op Fl abdhnt
 .Op Fl f Ar address_family
 .Op Fl M Ar core
 .Op Fl N Ar system
@@ -117,6 +117,9 @@ If
 .Fl d
 is also present, show the number of dropped packets.
 If
+.Fl h
+is also present, print all counters in human readable form.
+If
 .Fl t
 is also present, show the contents of watchdog timers.
 If

usr.bin/netstat/netstat.h

@@ -41,6 +41,7 @@ extern int	aflag;	/* show all sockets (including servers) */
 extern int	bflag;	/* show i/f total bytes in/out */
 extern int	dflag;	/* show i/f dropped packets */
 extern int	gflag;	/* show group (multicast) routing or stats */
+extern int	hflag;	/* show counters in human readable format */
 extern int	iflag;	/* show interfaces */
 extern int	Lflag;	/* show size of listen queues */
 extern int	mflag;	/* show memory stats */