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authorrgrimes <rgrimes@FreeBSD.org>1994-05-26 05:23:31 +0000
committerrgrimes <rgrimes@FreeBSD.org>1994-05-26 05:23:31 +0000
commit862fdf11a2ede45dec0da01ed575525d79468981 (patch)
tree7a1c88ccb8006476bd4b4a548a6ad48fbfc33a01 /usr.sbin/traceroute/median.awk
parent8e1a19ddde0df113b0b26b0ea621afd61dbaf91f (diff)
downloadFreeBSD-src-862fdf11a2ede45dec0da01ed575525d79468981.zip
FreeBSD-src-862fdf11a2ede45dec0da01ed575525d79468981.tar.gz
BSD 4.4 Lite usr.sbin Sources
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+#!/bin/awk -f
+#
+# Copyright (c) 1990, 1993
+# The Regents of the University of California. All rights reserved.
+#
+# This code is derived from software contributed to Berkeley by
+# Van Jacobson.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# 3. All advertising materials mentioning features or use of this software
+# must display the following acknowledgement:
+# This product includes software developed by the University of
+# California, Berkeley and its contributors.
+# 4. Neither the name of the University nor the names of its contributors
+# may be used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# @(#)median.awk 8.1 (Berkeley) 6/6/93
+#
+/^ *[0-9]/ {
+ # print out the median time to each hop along a route.
+ tottime = 0; n = 0;
+ for (f = 5; f <= NF; ++f) {
+ if ($f == "ms") {
+ ++n
+ time[n] = $(f - 1)
+ }
+ }
+ if (n > 0) {
+ # insertion sort the times to find the median
+ for (i = 2; i <= n; ++i) {
+ v = time[i]; j = i - 1;
+ while (time[j] > v) {
+ time[j+1] = time[j];
+ j = j - 1;
+ if (j < 0)
+ break;
+ }
+ time[j+1] = v;
+ }
+ if (n > 1 && (n % 2) == 0)
+ median = (time[n/2] + time[(n/2) + 1]) / 2
+ else
+ median = time[(n+1)/2]
+
+ print $1, median
+ }
+}
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