(G)AWK scripts

non-trivial AWK and GNU AWK scripts I've written

• mailcheck.awk,

  Given an email (ie spam) as input, try determine appropriate abuse contact information for the email, including SMTP servers it passed through and for hosts/ISPs of URLs given within the email. Don't think I finished it though, or got it production-ready.

• duplicate-files.awk

  Find duplicated files on a file system according to their size, MD5 and SHA-1 checksums and, optionally, replace any redundant copies with hardlinks in order to save space. I wrote this because a user of mine is incapable of managing his files and has a tendency to copy over folders of photos from his camera multiple times to many different locations - using up literally many many GBs of space for no good reason.

  This is a small but powerful and useful script. Also demonstrates ARGV/ARGC parsing in GAWK.

• iptables-config.awk

  Convert firewalling rules specified in psuedo-english to Linux iptables rules. See the iptables directory for more information.

• blacklists.awk

  Generate and install reject routes based on input of several well-known blacklists.