Shell Programming and Scripting

#!/bin/bash

#The free space of the tmp file;
free_space="0"

#Experimental path where the data file is stored into it.
#This path should be provided by the first argument of the shell.
exp_path=$1;

#Parse the input path and get the correct path of experiment
dir_name=$(dirname ${exp_path})
base_name=$(basename ${exp_path})
exp_path=$(echo ${dir_name}${base_name}/)
#echo ${exp_path}


function get_free_space {
    while read output
    do
        line=$(echo ${output} | awk '{print NF}')
        #echo $line
        if [ ${line} -le 1 ]
        then
            read output
            free_space=$(echo ${output} | awk '{print $3}')
            
        fi
        
        echo ${free_space}
    done
    
}


#df -H /tmp | grep -E "^/dev/" | get_free_space

df /tmp | grep -vE "^Filesystem|tmpfs" | get_free_space

echo ${free_space}

df /tmp

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/vg_rpc271-lv_root
                      72645928  34341336  34614304  50% /