Using Regex groups in bash

Question

Greetings,

I've got a directory with a list of pdfs in it:

file1.pdf, file2.pdf, morestuff.pdf ... etc.

I want to convert these pdfs to pngs, ie

file1.png, file2.png, morestuff.png ... etc.

The basic command is,

convert from to,

But I'm having trouble getting convert to rename to the same file name. The obvious 'I wish it worked this way' is

convert *.pdf *.png

But clearly that doesn't work. My thought process is that I should utilize regular expression grouping here, to say somethink like

convert (*).pdf %1.png

but that clearly isn't the right syntax. I'm wondering what the correct syntax is, and whether there's a better approach (that doesn't require jumping into perl or python) that I'm ignoring.

Thanks!

Answer 1

for f in *.pdf
do
  convert "$f" "${f%.pdf}.png"
done

Answer 2

for files in *.pdf 
do  
   if [ -f "$files" ];then
      convert "$files" "${files%.pdf}.png"
   fi
done

if you need to do it recursively,

find /path -type f -iname "*.pdf" | while read -r FILE
do
   convert "$FILE" "${FILE%.pdf}.png"
done

Answer 3

ls *.pdf | sed 's/\"/\\"/;s/^\(.*\).pdf$/convert "&" "\1.png"/' | bash