#!/bin/bash
## hashline, a terminal utility for writing lines full of hash marks.
## Useful for demarcating between lines of output of multiple commands.
## Usage: hashline [n] (Default: n=1)
## Writes n lines of hash marks to console.

if [ $1 -gt 0 ] 2>/dev/null ## Bit bucket errors from empty or noninteger arguements.
then export c=$1            ## Accept integer arguments greater than 0.
else export c=1             ## Otherwise loop count needs to be at least 1.
fi

for ((c; c>0; c-- ))              ## For each on 'n' counts:
do  let COLS=$(( $(tput cols) ))  ## Evaluate number of columns in display.
    for (($COLS; COLS>0; --COLS)) ## For each column in display:
    do echo -n "#"                ## Write on '#' on current line.
    done
    echo                          ## Move cursor down one line at end of loop.
done