#!/bin/sh

# takes a list of numbers (line separated) and prints the total

# License: LGPLv2

# Note the input to this will probably come from `cut`,

# so a couple of tips on cut:

# 1. columns from `ls -l` are delimited by a variable

# number of spaces. You can ignore this fact by

# squeezing said spaces with a `tr -s ' '` before

# you input to cut -d' '. Generally find is much

# better for printing inode info than ls.

# 2. You should probably always use the -s option to

# cut, so that it doesn't output lines that do not

# contain the delimiter

tr -cd '[.\n0-9]' | # only leave numbers

sed '/^$/d' | # delete any blank lines

#method 1

paste -s -d+ |

bc # all but last \n --> +

#method 2

#(tr '\n' +; echo 0) |

#bc # \n --> +

#method 3

#tr '\n' + # \n --> +

#sed 's/+$/\

#/' | # last + --> \n

#bc

#method 4

#(

#echo 0

#sed 's/\(.\)$/\1+/' # \n --> +\n

#echo p

#) |

#dc #5 times slower!

#method 5

#awk '{s+=$0} END {print s}'