arpwatch.rb

class Arpwatch < Formula
  desc "tool for monitoring ARP traffic"
  homepage "http://ee.lbl.gov/"
  url "ftp://ftp.ee.lbl.gov/arpwatch-2.1a15.tar.gz"
  sha256 "c1df9737e208a96a61fa92ddad83f4b4d9be66f8992f3c917e9edf4b05ff5898"

  def install
    # patch makefile to avoid permission errors
    chmod 0644, %w[Makefile.in]
    inreplace "Makefile.in",
      "$(INSTALL) -m 555 -o bin -g bin arpwatch $(DESTDIR)$(BINDEST)",
      "mkdir -p $(DESTDIR)$(BINDEST)\n\t$(INSTALL) -m 555 arpwatch $(DESTDIR)$(BINDEST)"
    inreplace "Makefile.in",
      "$(INSTALL) -m 555 -o bin -g bin arpsnmp $(DESTDIR)$(BINDEST)",
      "$(INSTALL) -m 555 arpsnmp $(DESTDIR)$(BINDEST)"
    inreplace "Makefile.in",
      "$(INSTALL) -m 444 -o bin -g bin $(srcdir)/arpwatch.8 \\",
      "mkdir -p $(DESTDIR)$(MANDEST)\n\t$(INSTALL) -m 444 $(srcdir)/arpwatch.8 \\"
    inreplace "Makefile.in",
      "$(INSTALL) -m 444 -o bin -g bin $(srcdir)/arpsnmp.8 \\",
      "$(INSTALL) -m 444 $(srcdir)/arpsnmp.8 \\"

    # patch wrong exitcode when showing usage, so test works
    chmod 0644, %w[arpwatch.c]
    inreplace "arpwatch.c",
      "\" \[-n net\[\/width\]\] \[-r file\]\\n\", prog\);\n\texit\(1\);",
      "\" \[-n net\[\/width\]\] \[-r file\]\\n\", prog\);\n\texit\(0\);"

    system "./configure", "--disable-debug", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make"
    system "make", "install"

    (prefix/"arpwatch").mkdir
    touch prefix/"arpwatch/arp.dat"
  end

  test do
    system("#{sbin}/arpwatch --version")
  end
end