#!/bin/sh # by Benjamin Okopnik # *** bkgr *** - A random background selector for XFree86 # Define the dir where the pictures are kept PIC_DIR=/usr/share/Eterm/pix # Create a unique tempfile name and save all PIC_DIR filenames into it TMPFILE=$(mktemp /tmp/temp.XXXXXX) ls $PIC_DIR/* > $TMPFILE 2> /dev/null # A) Gen a random # (0 - 32767). B) Confine it to a range of (1 - ). # C) Set $FNM to the filename on line $RANDOM in the $TMPFILE. FNM=$(head -$(($RANDOM / (32768 / $(grep -c . $TMPFILE)) + 1)) $TMPFILE | tail -1) # This allows a pic name to be entered as an arg to bkgr - "Honey! You # should see this KEWL background that came up!" :) Anyway, check if the # file exists (if an arg is entered) and substitute it for the random one. if [ -f $PIC_DIR/$1 ] then FNM=$PIC_DIR/$1 fi # Tell me the name for future reference - or, provide a doublecheck if # I do enter an arg ("Yep, I'm using the pic that you specified.") echo -n "Using " basename $FNM # Build in a 'wait-loop' to avoid a race condition with the WM - # replace "icewm" with your own window manager's name. while [ -z "$ICE" ] do ICE=$(ps ax | grep icewm) sleep 2 done # Handle the pics differently based on size; I've found 20kB # to be a good breakpoint for my JPGs and PNGs... if [ $((`ls -al $FNM | awk '{print $5}'`)) -gt 20480 ] then # Stretch to fit the root window... cat $FNM | xv -rmode 1 -max -quit - & else # ...or tile the sucker. cat $FNM | xv -rmode 3 -quit - & fi # Clean up... rm $TMPFILE # ...and exit gracefully. exit 0 # "Y'all come back now, y'hear?" :)