Assigning the variable inside the script and use it in same script

Question

echo -e '(b) \033[3;32m  for between hours\033[m';
echo -e ' please choose \033[32;5m (a or b)\033[m';
read option
#if [ "$option" == "a" ]
#then
        destination="/home/siva/test"
        echo -e 'date in format: \033[33;5m(mm-dd-yy) eg.10-30-22\033[m '       # date format of thread_dumps needed
        read -p "enter date : " D                               #enter the date of thread_dumps needed
        echo -e 'hour in format: \033[33;5m( HH )\033[m'
        read -p "enter Time (HH:MM) : " T   #enter specific hour of thread_dumps needed
        H= echo $T | awk '{print substr($1,1,2)}'

        find=`find /home/siva/thread_dumps/thread_dump_"$D"_"$H"\:[0-9][0-9]\:0[1-2]`

        echo $find
        #cp $find $destination

       # zip -r /home/siva/zip/thread_dumps_"$D".zip $find

In the above script I want to assign the variable (H= echo $T | awk '{print substr($1,1,2)}). And I want to use the variable in the same script. But this doesn't work for me. I want echo output in a variable and use it in find command

Answer 1

I'm not entirely sure, but it looks as if you don't need find in your code. You also don't need to do user interaction if you instead take the user's input from the command line arguments:

#!/bin/sh -u

# Usage:
#
# ./script MM-DD-YY HH
#

archive=$HOME/zip/thread_dumps_${1}.zip

if [ -e "$archive" ]; then
        printf '"%s" already exists\n' "$archive" >&2
        exit 1
fi

for dirpath in "$HOME/thread_dumps/thread_dump_${1}_${2}":??:??
do
        if [ -d "$dirpath" ]; then
                printf 'Processing "%s"\n' "$dirpath" >&2
                zip -r "$archive" "$dirpath"
        fi
done

This script takes the date and the hour from the arguments given by the user on the script's command line. It then uses basic filename globbing to match the directories that should be archived and does so one directory at a time. Modify the pattern to fit your needs.

A small change to this would be to make sure that the path $HOME is not stored in the archive so that the archive unzips into a tread_dumps archive.

You can do that by changing the loop into

for dirpath in "$HOME/thread_dumps/thread_dump_${1}_${2}":??:??
do
        if [ -d "$dirpath" ]; then
                printf 'Processing "%s"\n' "$dirpath" >&2
                ( cd "$HOME" && zip -r "$archive" "${dirpath#$HOME/}" )
        fi
done