[src/trunk]: src/usr.bin/netstat Use itimerval() instead of alarm() for inter...

[ragge <ragge%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2a5e51f68733
branches:  trunk
changeset: 555353:2a5e51f68733
user:      ragge <ragge%NetBSD.org@localhost>
date:      Sat Nov 15 11:54:34 2003 +0000

description:
Use itimerval() instead of alarm() for interval displaying. This increases
accuracy on interval stats also on fast machines.

diffstat:

 usr.bin/netstat/if.c |  13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diffs (54 lines):

diff -r 145b47d90577 -r 2a5e51f68733 usr.bin/netstat/if.c
--- a/usr.bin/netstat/if.c      Sat Nov 15 10:50:59 2003 +0000
+++ b/usr.bin/netstat/if.c      Sat Nov 15 11:54:34 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if.c,v 1.56 2003/08/19 12:52:13 itojun Exp $   */
+/*     $NetBSD: if.c,v 1.57 2003/11/15 11:54:34 ragge Exp $    */
 
 /*
  * Copyright (c) 1983, 1988, 1993
@@ -34,13 +34,14 @@
 #if 0
 static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94";
 #else
-__RCSID("$NetBSD: if.c,v 1.56 2003/08/19 12:52:13 itojun Exp $");
+__RCSID("$NetBSD: if.c,v 1.57 2003/11/15 11:54:34 ragge Exp $");
 #endif
 #endif /* not lint */
 
 #include <sys/types.h>
 #include <sys/protosw.h>
 #include <sys/socket.h>
+#include <sys/time.h>
 
 #include <net/if.h>
 #include <net/if_dl.h>
@@ -413,6 +414,7 @@
        unsigned interval;
        u_long off;
 {
+       struct itimerval it;
        struct ifnet ifnet;
        u_long firstifnet;
        struct iftot *ip, *total;
@@ -455,7 +457,11 @@
 
        (void)signal(SIGALRM, catchalarm);
        signalled = NO;
-       (void)alarm(interval);
+
+       it.it_interval.tv_sec = it.it_value.tv_sec = interval;
+       it.it_interval.tv_usec = it.it_value.tv_usec = 0;
+       setitimer(ITIMER_REAL, &it, NULL);
+
 banner:
        if (bflag)
                printf("%7.7s in %8.8s %6.6s out %5.5s",
@@ -600,7 +606,6 @@
        }
        sigsetmask(oldmask);
        signalled = NO;
-       (void)alarm(interval);
        if (line == 21)
                goto banner;
        goto loop;