ls -l $* | awk '
# filesum: list files and total size in bytes
# input: long listing produced by "ls -l"

#1 output column headers
BEGIN { print "BYTES", "\t", "FILE" }

#2 test for 9 fields; files begin with "-"
NF == 9 && /^-/ {
        sum += $5       # accumulate size of file
        ++filenum       # count number of files
        printf("%-15s\t%10d\n", $9, $5)       # print filename and size
}

#3 test for 9 fields; directory begins with "d"
NF == 9 && /^d/ {
        print "<dir>", "\t", $9  # print <dir> and name
}

#4 test for ls -lR line ./dir:
$1 ~ /^\..*:$/ {
        print "\t" $0 # print that line preceded by tab
}

#5 once all is done,
END {
	# print total file size and number of files
	printf("Total: %d bytes  (%d files)\n", sum, filenum)
}'