Contents

#!/usr/bin/env ruby
# searches for a binary string in input
# string is provided 'hexified'
#
# usage: bgrep 'deadbeef' file
#
# use -h for more info

require 'rbkb'
require 'rbkb/command_line'

include RBkB::CommandLine

#-------------------------------------------------------------------------------
# Init options and arg parsing
OPTS = {
  :start_off => 0, 
  :end_off => -1, 
  :align => nil
}

arg = bkb_stdargs(nil, OPTS)

arg.banner += " <subject> <file | blank for stdin>"

arg.on("-x", "--[no-]hex", "Specify subject as hex (default: false)") do |x|
  OPTS[:hex] = x
end

arg.on("-r", "--[no-]regex", "Specify subject as regex (default: false)") do |r|
  OPTS[:rx] = r
end

arg.on("-a", "--align=BYTES", Numeric, 
       "Only match on alignment boundary") do |a|
  OPTS[:align] = a
end

arg.on("-n", "--[no-]filename", "Suppress prefixing of filenames.") do |n|
  OPTS[:suppress_fname] = n
end


#------------------------------------------------------------------------------
# Parse arguments
begin
  arg.parse!

  unless find = ARGV.shift
    raise "need subject argument"
  end

  if OPTS[:hex] and OPTS[:rx]
    raise "-r and -x are mutually exclusive"
  end

  if OPTS[:hex]
    raise "you specified -x for hex and the subject isn't" unless find.ishex?
    find = find.unhexify
  elsif OPTS[:rx]
    find = Regexp.new(find, Regexp::MULTILINE)
  end

  align = OPTS[:align]

  if fname=ARGV.shift
    dat = File.read(fname)
    fname = nil unless ARGV[0]  # only print filename for multiple files
  else
    fname = nil
    dat = STDIN.read
  end

  loop do 
    dat.bgrep(find, align) do |hit_start, hit_end, match|
      print "#{fname}:" if fname and not OPTS[:suppress_fname]

      puts("#{(hit_start).to_hex.rjust(8,"0")}:"+
           "#{(hit_end).to_hex.rjust(8,"0")}:b:"+
           "#{match.inspect}")
    end

    break unless fname=ARGV.shift
    dat = File.read(fname)
  end

rescue
  STDERR.puts $!, "  use -h for help"
  exit 1
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
emonti-rbkb-0.6.1.1	bin/bgrep
emonti-rbkb-0.6.1.2	bin/bgrep
emonti-rbkb-0.6.1.3	bin/bgrep