#!/bin/ksh
# @(#) saravg.ksh 1.2 97/02/05
# 94/02/05 John H. DuBois III (john@armory.com)
# 94/07/06 Added all options.
# 97/02/05 Added o option.  Print formfeeds between output sets.

name=${0##*/}
Usage="Usage: $name [-ho] [-aBbcdgHmnpqRruvwy] [-[se] time] [filename ...]"
sarout=false

# Save args because some ksh versions lose positional params when set -A is
# used.
set -A files -- "$@"

while getopts :hoaBbcdgHmnpqRruvwys:e: opt; do
    case $opt in
    h)
	echo \
"$name: print system activity averages.
$Usage
$name runs 'sar' with any arguments, and prints only the headers and average
values.  If no filenames are given, the current sadc logfile is processed.
Otherwise, sar is run on each named sadc logfile.  If more than one logfile is
given, a formfeed is printed between each output set.  If no report selection
options are given, the default of -A (all reports) is used.  Use -H instead of
-h to get buffer statistics.
Non-sar options:
-h: Print this help.
-o: Take the files to be sar output files rather than sadc logfiles (data
    recorded by sadc, the system activity data collector).  If this option is
    used, no other options may be given; the output will be averages from
    whatever reports sar was asked to generate.  If no filenames are given, the
    standard input is read."
	exit 0
	;;
    [se])
	set -A args -- "${args[@]}" -$opt "$OPTARG"
	;;
    [aBbcdgmnpqRruvwy])
	set -A args -- "${args[@]}" -$opt
	;;
    o)
	sarout=true
	;;
    H)
	set -A args -- "${args[@]}" -h
	;;
    +?)
	print -u2 "$name: options should not be preceded by a '+'."
	exit 1
	;;
    :)
        print -r -u2 -- \
        "$name: Option '$OPTARG' requires a value.  Use -h for help."
        exit 1
        ;;
    ?) 
	print -u2 "$name: $OPTARG: bad option.  Use -h for help."
	exit 1
	;;
    esac
done
 
if [ ${#args[*]} -eq 0 ]; then
    set -A args -- -A
elif $sarout; then
    print -ru2 -- "$name: -o may not be given with any other options.  Exiting."
    exit 1
fi

set -- "${files[@]}"	# Restore args
# remove args that were options
let OPTIND=OPTIND-1
shift $OPTIND

if [ $# -eq 0 ]; then
    $sarout && cat || sar "${args[@]}"
else
    while [ $# -gt 0 ]; do
	print -r -- "Input file: $1
"
	$sarout && cat -- "$1" || sar "${args[@]}" -f "$1"
	shift
	[ $# -gt 0 ] && echo -n "\014"
    done
fi | sed -n '/Average/,/^[0-9]/p;1,/^[0-9]/p'