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Full Discussion: awk Behavior
Top Forums UNIX for Beginners Questions & Answers awk Behavior Post 302978826 by Yoda on Thursday 4th of August 2016 01:16:49 PM
Old 08-04-2016
Thank you Don. I checked gawk code in field.c - routines for dealing with fields and record parsing.

So record parsing happens first with default field separator, then new field separator is used to parse subsequent records.

I also noticed that function set_NF is called before record parsing. So gawk behavior for this variable is different.
Code:
awk -F, '{NF=1}{print $NF}' dafile
10.10.10.10
10.10.10.11
10.10.10.12
10.10.10.13

Any idea why developers didn't do the same with function set_FS
 

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ntptrace(8)						      System Manager's Manual						       ntptrace(8)

NAME
ntptrace - trace a chain of NTP servers back to the primary source SYNOPSIS
ntptrace [ -n ] [ -m maxhosts ] [ server ] DESCRIPTION
ntptrace is a perl script that uses the ntpq utility program to follow the chain of NTP servers from a given host back to the primary time source. For ntptrace to work properly, each of these servers must implement the NTP Control and Monitoring Protocol specified in RFC 1305 and enable NTP Mode 6 packets. If given no arguments, ntptrace starts with localhost. Here is an example of the output from ntptrace: % ntptrace localhost: stratum 4, offset 0.0019529, synch distance 0.144135 server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784 usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB' On each line, the fields are (left to right): the host name, the host stratum, the time offset between that host and the local host (as measured by ntptrace; this is why it is not always zero for "localhost"), the host synchronization distance, and (only for stratum-1 servers) the reference clock ID. All times are given in seconds. Note that the stratum is the server hop count to the primary source, while the synchronization distance is the estimated error relative to the primary source. These terms are precisely defined in RFC-1305. OPTIONS
-n Turns off the printing of host names; instead, host IP addresses are given. This may be useful if a nameserver is down. BUGS
This program makes no attempt to improve accuracy by doing multiple samples. SEE ALSO
ntpd(8) The official HTML documentation. This file was automatically generated from HTML source. ntptrace(8)
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