File: regex.stp

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#!/usr/bin/env stap
# regex.stp
# Uses the regex functionality to detect opened files whose names
# match a pattern given on the command line. If no command line
# parameter is given, demonstrate by filtering for files that end with
# an extension showing them to be an archive.

probe syscall.open {
      if (filename =~ %($# == 0 %?
                         "(\\.tar\\.(gz|bz2|xz)|\\.zip|\\.tgz|\\.tbz)$"
                      %: @1 %) ) {
         printf ("opened %s\n", filename)
      }
}