SUMMARY AGAIN: port speed

Enough people have asked me for a copy of that script that I will just
post it to the mailing list.  Note that there are several ways to find
the speed of a port.  Since they are all in a script, it really does not
matter which set you use, just so it is complete.  NB: if a port is set
to "autonegotiate", all five checks respond as "1", so the output will
be that all speeds are enabled on a particular port.

btw, this is in reference to

> Does anyone know of a single command that will tell me the speed of an
> interface?  I have a shell script with ndd commands to query the speed,
> but that shell script queries each interface 5 times (10/half, 10/full,
> 100/half, 100/full, autonegotiate) and so it is much harder to put in
> cron.  TIA.
> 
> The answer:
> 
> [...]
> I have written a perl
> script that gets all interface names on a machine and then runs the
> appropriate ndd commands to determine the speed of all interfaces.
> 
> +-----------------------------------------------------------------------+
> | Christopher L. Barnard         O     When I was a boy I was told that |
> | cbarnard@tsg.cbot.com         / \    anybody could become president.  |
> | (312) 347-4901               O---O   Now I'm beginning to believe it. |
> | http://www.cs.uchicago.edu/~cbarnard                --Clarence Darrow |
> +----------PGP public key available via finger or PGP keyserver---------+


------8<-------

#!/usr/local/bin/perl
#
### script to report the current network speed of all interfaces.
###
### Christopher L. Barnard
### April 2002

{

###
### You have to be root to do these ndd commands.
###

$login = getpwuid($<);

if ( $login ne "root" ) {
    printf ("You have to be root to do this.\n");
    exit 3;
}

###
### get the name of all of the interfaces on this machine (from ifconfig)
### and put them into an array.
###

    @ifconfigline = ( `/sbin/ifconfig -a | /usr/bin/grep "flags=" ` );

###
### Now chop off all but the interface name (the first part of each line)
###

    for ($i=0; $i<=$#ifconfigline; $i++) {
	@interface[$i] = split(/[:]/,@ifconfigline[$i]);
    }

###
### Next, separate the interface name from the interface number.
### For simplicy, I am assuming that the last digit is the number and
### all other characters are the interface name.  Of course, this will
### not work if there are more than ten interfaces on a machine that are
### all of the same type.
###
### start counting at one to discard the 0th interface, which will be lo0.
###

    for ($i=1; $i<=$#ifconfigline; $i++) {
	@intnumber[$i] = substr (@interface[$i], -1, 1);
	chop @interface[$i];
	$tmpintname = substr(@interface[$i],0);
	@intname[$i] = "/dev/" . $tmpintname;
	printf ("@intname[$i]@intnumber[$i]: ");

###
### now do the ndd commands on the interface.  If the ndd command
### returns "1", then that is what the interface is set to.  The "chop"
### command is because ndd returns a number followed by a <cr> to make
### it more readable; all I care about is the number. 
###

	if ( @intname[$i] eq "/dev/le" ) {
	    printf (" le interfaces can only do 10/half.\n");
	} else {
	    `/usr/sbin/ndd -set @intname[$i] instance @intnumber[$i]`;
	    $return=`/usr/sbin/ndd -get @intname[$i] adv_autoneg_cap`;
	    chop $return;
	    if ( "$return" eq "1" ) {
		printf(" autonegotiating");
	    }
	    $return=`/usr/sbin/ndd -get @intname[$i] adv_10hdx_cap`;
	    chop $return;
	    if ( "$return" eq "1" ) {
		printf(" 10mbit/sec, half duplex");
	    }
	    $return=`/usr/sbin/ndd -get @intname[$i] adv_10fdx_cap`;
	    chop $return;
	    if ( "$return" eq "1" ) {
		printf(" 10mbit/sec, full duplex");
	    }
	    $return=`/usr/sbin/ndd -get @intname[$i] adv_100hdx_cap`;
	    chop $return;
	    if ( "$return" eq "1" ) {
		printf(" 100mbit/sec, half duplex");
	    }
	    $return=`/usr/sbin/ndd -get @intname[$i] adv_100fdx_cap`;
	    chop $return;
	    if ( "$return" eq "1" ) {
		printf(" 100mbit/sec, full duplex");
	    }
	    printf("\n");
	}
    }
}
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