#!/bin/bash # cvt.sh: # Converts all the MacPaint image files in a directory to "pbm" format. # Uses the "macptopbm" binary from the "netpbm" package, #+ which is maintained by Brian Henderson (bryanh@giraffe-data.com). # Netpbm is a standard part of most Linux distros. OPERATION=macptopbm SUFFIX=pbm # New filename suffix. if [ -n "$1" ] then directory=$1 # If directory name given as a script argument... else directory=$PWD # Otherwise use current working directory. fi # Assumes all files in the target directory are MacPaint image files, #+ with a ".mac" filename suffix. for file in $directory/* # Filename globbing. do filename=${file%.*c} # Strip ".mac" suffix off filename #+ ('.*c' matches everything #+ between '.' and 'c', inclusive). $OPERATION $file > "$filename.$SUFFIX" # Redirect conversion to new filename. rm -f $file # Delete original files after converting. echo "$filename.$SUFFIX" # Log what is happening to stdout. done exit 0 # Exercise: # -------- # As it stands, this script converts *all* the files in the current #+ working directory. # Modify it to work *only* on files with a ".mac" suffix. # *** And here's another way to do it. *** # #!/bin/bash # Batch convert into different graphic formats. # Assumes imagemagick installed (standard in most Linux distros). INFMT=png # Can be tif, jpg, gif, etc. OUTFMT=pdf # Can be tif, jpg, gif, pdf, etc. for pic in *"$INFMT" do p2=$(ls "$pic" | sed -e s/\.$INFMT//) # echo $p2 convert "$pic" $p2.$OUTFMT done exit $?