Even more problems came to bite me. I had intended to use wget with some options like -r to easily download all the images that I have listed on the front page of my CakePHP backend. However, Kindle's busybox wget is quite primitive; it does not have so many options, and I am forced to perform grep, awk and a lot more scripting to download the pictures that I uploaded. Here's the code:
In addition, Kindle renames screensavers after restart. All the photos inside the screensavers folder will be renamed to bg_xsmall_ssXX.png. That implies that a maximum of 100 photos are allowed. In addition, if the order of the photos is to be randomized via creating a file called "random", all the photos' filenames will be randomized again upon bootup, meaning I won't be able to tell if /var/local/blanket/screensaver/last_ss points to a photo or downloaded image.
In view of these, I decided to rotate the photos myself by placing one 1 photo inside the screensavers directory: bg_small_ss00.png, and replace that file everytime I change my screensaver. As usual, Busybox is so limited in functionality that I have to go through massive scripting just to choose a random photo or determine a random number. This is my updated screensaver-changing script:
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