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List:       ntp-bugs
Subject:    [ntp:bugs] [Bug 2764] New: interface commands vs -I don't behave as documented
From:       bugzilla-daemon () ntp ! org
Date:       2015-02-21 19:12:48
Message-ID: bug-2764-1197 () http ! bugs ! ntp ! org/
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http://bugs.ntp.org/show_bug.cgi?id=2764

             Bug #: 2764
           Summary: interface commands vs -I don't behave as documented
           Product: ntp
           Version: 4.2.8
          Platform: Other
        OS/Version: Linux
            Status: CONFIRMED
          Severity: normal
          Priority: P5
         Component: ntpd
        AssignedTo: stenn@ntp.org
        ReportedBy: tlhackque@yahoo.com
                CC: bugs@ntp.org
    Classification: Unclassified


I noted this as a doc issue in a note to Dave, but he agrees that it's an
implementation bug.  The behavior was introduced in response to bug 1330.

I would prefer to have the code fixed.  If not, the doc needs to match the
code...

On http://www.eecis.udel.edu/~mills/ntp/html/miscopt.html

"interface" says "interface commands are **disabled** if any -I, --interface,
-L, or --novirtualips command-line options are used."

my ntp.conf has:

    interface drop wildcard
    interface listen 127.0.0.1
    interface listen 192.168.148.10

If I run ntpd 4.2.8p1@1.3265-o with

    ntpd/ntpd -I ixp0 -I lo -g -c /opt/etc/ntp.conf  #<< ixp0 is an XSCALE
interface name

ntpd exits with the log file containing:

    interface/nic rules are not allowed with --interface (-I) or --novirtualips
(-L), exiting

I read the documentation to mean that -I would cause the interface commands to
be ignored ("disabled"), but expected ntpd to run using the -I interface(s).

The expected behavior is actually useful; I have a case where the startup file
checks for an installation environment and wants to force use of a special
interface.  The alternative, editing the config file during startup, is rather
ugly.

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