#!/bin/sh -
#
#   Usage:  ifstat [-v] [<interface>]
#
#   Oliver Fromme  <olli@fromme.com>  <olli@secnetix.de>
#
#   This script displays ethernet interface parameters
#   on a Sun Solaris machine.  If no interface is
#   specified, all interfaces found on the machine are
#   listed.
#
#   Use the -v option to see _all_ parameters.  Without
#   it, only the current link parameters are listed.
#

if [ `/usr/xpg4/bin/id -u` -ne 0 ]; then
	echo "${0}:  You must be root to run me." >&2
	exit 1
fi

PATH=/sbin:/usr/sbin:/bin:/usr/bin
export PATH

VERBOSE=0
if [ "x$1" = "x-v" ]; then
	VERBOSE=1
	shift
fi

NDDSTAT()
{
	echo "${1}${2}:"
	if [ ! -r /dev/"$1" ]; then
		echo "/dev/${1}:  No such file or directory" >&2
		exit 1
	fi
	ndd -set /dev/$1 instance $2
	ndd /dev/$1 \? \
	| grep -v '^\?' \
	| while read KEY JUNK; do
		VAL=`ndd /dev/$1 "$KEY"`
		case "$KEY" in
			link_status)
				case "$VAL" in
					0)	COMMENT="  (no carrier)";;
					1)	COMMENT="  (active)";;
					*)	COMMENT="  (?)"
				esac
				;;
			link_speed)
				case "$VAL" in
					0)	COMMENT="  (10 MBit/s)";;
					1)	COMMENT="  (100 MBit/s)";;
					*)	COMMENT="  (?)"
				esac
				;;
			link_mode)
				case "$VAL" in
					0)	COMMENT="  (half-duplex)";;
					1)	COMMENT="  (full-duplex)";;
					*)	COMMENT="  (?)"
				esac
				;;
			*)
				COMMENT=""
		esac
		if [ -n "$COMMENT" -o $VERBOSE -eq 1 ]; then
			printf '\t%-20s %s%s\n' "$KEY" "$VAL" "$COMMENT"
		fi
	done
}

if [ $# -lt 1 ]; then
	ifconfig -a \
	| sed -n '/^lo[0-9]*:/!s/^\([a-z][a-z]*\)\([0-9][0-9]*\):.*$/\1 \2/p' \
	| while read DEV INS; do
		NDDSTAT $DEV $INS
	done
else
	DEV=`expr "x$1" : 'x\([a-z][a-z]*\)'`
	INS=`expr "x$1" : 'x[a-z][a-z]*\([0-9][0-9*]\)^'`
	if [ -z "$INS" ]; then
		INS=0
	fi
	NDDSTAT $DEV $INS
fi

#--