Shell Programming and Scripting

Hello, I'm having a problem figuring out the syntax for padding 10-99. Everything else in the program works fine so I want to focus in on just this part of the code. Below is a snippet of the code that I am having problems with. I appreciate all the help I can get. Thank you.

The script basically takes an image and adds the convert charcoal filter and spits out a sequence the user specifies. Problem is if the frame goes over 100...the padding is thrown off since 100 is set for greater than or equal to, where 10-99 needs to be specified to a limit before 100.

I seen a for loop where it prints like so..

for i in {10..99} etc... but that will not work, it only prints and {10..99} does not work for an if statement.


##no problem here

if [ $count -lt 10 ]; then
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.000$count.jpg
fi


##cant figure out the arithmatic here!

if ( $count -ge 10 > 99 ); then
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.00$count.jpg
fi


##no problems here.

if [ $count -ge 100 ] ; then
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.0$count.jpg
fi

Code:

$
$ count=10
$ echo $count
10
$
$ while [ $count -le 20 ] ; do
>   echo $count
>   count=`expr $count + 1`
> done
10
11
12
13
14
15
16
17
18
19
20
$

tyler_durden

Can there be a while loop inside of a while loop? I already had one at the top. Heres the code edited. It's not correct, please correct me where im wrong.

count=$START
while [ $count -le $END ];
do
echo $count

if [ $count -lt 10 ]; then
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.000$count.jpg
fi

count=10
while [ $count -le 99 ]; do
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.00$count.jpg
count=`expr $count + 1`
done


if [ $count -ge 100 ] ; then
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.0$count.jpg
fi


SETTING=$(echo "scale=4; 1/50" | bc)
echo "processing frame: "$count""

let count=count+1

done

You can't do this because you reset count to 10 everytime. That won't get anything over 100 if count goes over 100.

Code:

count=10
while [ $count -le 99 ]; do
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.00$count.jpg
count=`expr $count + 1`
done

Maybe try

Code:

if [ $count -ge 10 && $count -le 99 ]
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.00$count.jpg
fi

Hmm..when I run this...

Code:

if [ $count -ge 10 && $count -le 99 ]; then
convert ${IMGDIR}${IMG} -charcoal $count ${OUTDIR}${OUT}.00$count.jpg
fi

It goes up to 9 and stops, my error from 0-10 is...

Code:

line 88: [: missing `]'

Sorry,
That shoudl be

Code:

if [ $count -ge 10 ] && [ $count -le 99 ] ;then

i actually just figured that out right before you posted ;P The process is running to 101 as we speak. Hopefully all goes well. Thanks BubbaJoe, durden_tyler.

---------- Post updated at 04:48 PM ---------- Previous update was at 04:32 PM ----------

Eureka, it worked!