BASH progressbar

TheSpork · 10-09-2005, 05:58 AM

I'm looking for a way to implement a progress bar in a bash-script.

The script I've made "prepares" a bunch of images on my web page, before I'm using the "album"-tool to generate an album. First the script converts all letters to small case, then resizing all images to 800x600, decreases quality and last of all changes the permissions on files and directories.

When I runt his script now, I haven't got any indication of how long it will take, and how much time is left. The "album" script has included this, but the creator of that script is a "little" more advanced than me..

Does anyone know how I can include a hash progress bar (like in "album") so the result will look something like this:

Code:

Converting     [XXXXXXXXXX]
Resizing       [XXXXXX    ]
..and so on..

Any suggestions?

Tinkster · 10-09-2005, 11:02 PM

I suppose the first problem this poses is that you'll have to
establish how many actions you'll have to take in this step
before you do the work (probably doesn't make too much
sense in the renaming scenario because finding the files
you need to rename will take about as long as finding and
renaming them). In terms of the conversions it would make
sense since it consumes some cpu and time. I guess you
could calculate the original sizes of all images, and then
time the first three or four, keeping track of the sizes of
the files converted and create those Xs on the fly based
on percentage.

Over all the question is a bit too generic, we don't know
where your problem lies, whether it's the calculation of
the progress or the plain output.

Cheers,
Tink

TheSpork · 10-09-2005, 11:15 PM

Well.. My problem is that I don't know how to show the output.

The first part (changing ABC -> abc) takes about 5 seconds, but resizing the pictures takes several minutes (quite a few images, and my webserver is running on a P3 500MHz w/ 512 MB RAM)

I'm using `find` to locate and resize all the .jpg-images like this:

Code:

find /home/thespork/html/bilder -name '*.jpg' -exec convert -size 800x600 {} -geometry 800x600 {} \; &> /dev/null

With a similar `find`-command, I could get the total size, but don't know where to go from there. Do you know how to output a progress bar when you know the total size of all the images? I'm not quite sure how you can time the first ones and calculate the rest..