I'm writing a bash script to get some podcasts. The problem is that some of the podcast numbers are one digits while others are two/three digits, therefore I need to pad them to make them all 3 digits.
I tried the following:
n=1 n = printf %03d $n wget http://aolradio.podcast.aol.com/sn/SN-$n.mp3
but the variable 'n' doesn't stay padded permanently. How can I make it permanent?
Use backticks to assign the result of the printf command (``):
n=1 wget http://aolradio.podcast.aol.com/sn/SN-`printf %03d $n`.mp3
EDIT: Note that i removed one line which was not really necessary. If you want to assign the output of 'printf %...' to n, you could use
n=`printf %03d $n`
and after that, use the $n variable substitution you used before.
Seems you're assigning the return value of the printf command (which is its exit code), you want to assign the output of printf.
bash-3.2$ n=1 bash-3.2$ n=$(printf %03d $n) bash-3.2$ echo $n 001