Running percentage in bash for backups

robertjinx · 03-27-2009, 04:53 PM

Hello, I got a script which does backup for my databases, also I create a percentage to see how much is done.
The problem is that right now, the idea work line by line, meaning show the percent done.

Example:

Backup done: 77%
Backup done: 78%
Backup done: 80%
Backup done: 81%
Backup done: 82%
Backup done: 84%
Backup done: 85%
Backup done: 87%
Backup done: 88%
Backup done: 90%
Backup done: 91%
Backup done: 92%
Backup done: 94%
Backup done: 95%
Backup done: 97%
Backup done: 98%
Backup done: 100%

Does anyone know how to make this in one line, but without using clear, just like perl would do or C/C++?

Please let me know, im interested for bash or sh.

Thanks!

radoulov · 03-27-2009, 06:17 PM

Code:

i=1
while ((i<=100));do 
  printf '\r%d%% done' $i
  sleep 1
  ((++i))
done

For old, pre-POSIX shells:

Code:

i=1
while [ $i -le 100 ];do 
  printf '\r%d%% done' $i
  sleep 1
  i=`expr $i + 1`
done

robertjinx · 03-28-2009, 04:31 AM

Hello, it works but it doesnt, I cant added a text in front of the percentage and any line that i add it will be after the percentage.

Simple example:

#!/bin/sh

i=1
printf 'Doing stuff: '
while ((i<=100));do
printf '\r%d%% done' $i
sleep 1
((++i))
done

Output:
3% donetuff:

If you know how to fix this, please let me know.

druuna · 03-28-2009, 05:23 AM

Hi,

Replace printf 'Doing stuff: ' by:

printf 'Doing stuff:\n'

or by

echo 'Doing stuff:'

Hope this helps.

robertjinx · 03-28-2009, 08:17 AM

printf 'Doing stuff:\n' is seems to work, but how can i do

Doing backup: 20%

Because this doesnt work.

Any ideas, sorry for so many questions

tredegar · 03-28-2009, 01:17 PM

Quote:

Hello, I got a script which does backup for my databases...
printf 'Doing stuff:\n' is seems to work, but how can i do

Perhaps if you just posted your entire script (In CODE tags please - Just click Advanced" at the bottom of this quick-reply window, then the # button) this would be easier to solve for you.

Maybe you just need to use some ANSI control codes ( http://www.termsys.demon.co.uk/vtansi.htm ) to reset the cursor to the beginning of the line before you print the % done bit.

robertjinx · 03-28-2009, 01:27 PM

Here it is:

PHP Code:



 
echo -en "Running mysql backup: " 
for idb in $DB; do 
        DBDONE=$(expr $DBDONE + 1) 
        do_dump $idb ${BACKUPDIR}/${idb}.sql >/dev/null 2>&1; DBERR=$? 
        if [ $DBERR -eq 0 ]; then 
                DBPASS=$(expr $DBPASS + 1) 
        else 
                DBFAIL=$(expr $DBFAIL + 1) 
        fi 
        if [ -f ${BACKUPDIR}/${idb}.sql ]; then 
                do_archiv ${BACKUPDIR}/${idb}.sql >/dev/null 2>&1; FILEERR=$? 
                if [ $FILEERR -eq 0 ]; then 
                        GZPASS=$(expr $GZPASS + 1) 
                else 
                        GZFAIL=$(expr $GZFAIL + 1) 
                fi 
        else 
                ERRONFILE="$ERRONFILE ${idb}.sql" 
        fi 
        PER=$(echo "scale=2; ${DBDONE}/${DBCOUNT}*100"|bc -l|awk '{$1=sprintf("%.0f",$1)}1') 
        printf '\r%d%% done' $PER 
done

So any ideas?! Because "Running mysql backup:" ends up like this:

11% donemysql backup:

tredegar · 03-28-2009, 01:44 PM

Maybe just change:

Code:

echo -en "Running mysql backup: "

to

Code:

echo "Running mysql backup: "

But if you really want it all on the one line, you are going to have to use some ANSI escape sequences from the link I gave you, to reset the cursor to the correct position on the current line before you do the printf

robertjinx · 03-28-2009, 02:38 PM

Well echo doesnt work, like I want too:

Running mysql backup:
43% done

and I would aspect Running mysql backup: 43% done

and with the ANSI stuff, can u give me an example, never did this before so really dont know.

tredegar · 03-28-2009, 05:45 PM

Quote:

Well echo doesnt work.. [SNIP] ..and with the ANSI stuff, can u give me an example, never did this before so really dont know.

You need to do a bit of reading, research and learning. You also need to learn how to write, spell, punctuate, and use capitals, but I digress.

I am not going to do this all for you, but I'll happily give you an example to help you get started:

Try this in a terminal:

Code:

cat /var/log/messages

Your terminal will be filled with text.

Now enter:

Code:

echo -ne "\033[5;10f"

Now answer these questions for yourself, and feel free to experiment:

- What has happened to your cursor?
- Where is it in your terminal screen?
- Why did it move there?
- What happens if you just press <RETURN>
- What happens when you enter a command?

Now re-read the link I gave you to the ANSI Escape codes.

Then you'll find the answer yourself, and maybe will have learnt something that you can usefully use in the future.

robertjinx · 03-28-2009, 06:28 PM

PHP Code:



You also need to learn how to write, spell, punctuate, and use capitals, but I digress.

If you wanna help, help, if not than please do not comment, English is not my mother language and of course errors will happen. If you do not like it, then just ignore my post, its not really that hard.
I asked for help from anyone who may know and wanna help out, I didnt ask an opinion on my English skills, if I would, you'll be the first to be informed.

Thanks!