osx/lldpd.rb

   1 class Lldpd < Formula
   2   desc "Implementation of IEEE 802.1ab (LLDP)"
   3   homepage "https://vincentbernat.github.io/lldpd/"
   4   url "https://media.luffy.cx/files/lldpd/lldpd-1.0.1.tar.gz"
   5   sha256 "450b622aac7ae1758f1ef82f3b7b94ec47f2ff33abfb0e6ac82555b9ee55f151"
   6
   7   option "with-snmp", "Build SNMP subagent support"
   8
   9   depends_on "pkg-config" => :build
  10   depends_on "libevent"
  11   depends_on "net-snmp" if build.with? "snmp"
  12   depends_on "readline"
  13
  14   def install
  15     readline = Formula["readline"]
  16     args = %W[
  17       --prefix=#{prefix}
  18       --sysconfdir=#{etc}
  19       --localstatedir=#{var}
  20       --with-launchddaemonsdir=no
  21       --with-privsep-chroot=/var/empty
  22       --with-readline
  23       --with-xml
  24       CPPFLAGS=-I#{readline.include}\ -DRONLY=1
  25       LDFLAGS=-L#{readline.lib}
  26     ]
  27     args << (build.with?("snmp") ? "--with-snmp" : "--without-snmp")
  28
  29     system "./configure", *args
  30     system "make"
  31     system "make", "install"
  32   end
  33
  34   def post_install
  35     (var/"run").mkpath
  36   end
  37
  38   def dscl(*args)
  39     result = `dscl . -#{args.join(' ')} 2> /dev/null`
  40     if $? != 0
  41       raise ErrorDuringExecution, "Failure while executing dscl: #{args.join(' ')}"
  42     end
  43     return result
  44   end
  45
  46   # Create user and group if needed
  47   def caveats
  48     u = "_lldpd"
  49     unless Kernel.system "/usr/bin/dscl . -read /Users/#{u} &> /dev/null"
  50       # Find a free UID/GID
  51       uids = dscl("list /Users uid")
  52       gids = dscl("list /Groups gid")
  53       uid = 200
  54       while uids =~ Regexp.new("#{Regexp.escape(uid.to_s)}\n") || gids =~ Regexp.new("#{Regexp.escape(uid.to_s)}\n")
  55         uid += 1
  56       end
  57       s = <<~EOS
  58         You need to create a special user to run lldpd.
  59         Just type the following commands:
  60             sudo dscl . -create /Groups/#{u}
  61             sudo dscl . -create /Groups/#{u} PrimaryGroupID #{uid.to_s}
  62             sudo dscl . -create /Groups/#{u} Password "*"
  63             sudo dscl . -create /Groups/#{u} RealName "lldpd privilege separation group"
  64             sudo dscl . -create /Users/#{u}
  65             sudo dscl . -create /Users/#{u} UserShell /usr/bin/false
  66             sudo dscl . -create /Users/#{u} NFSHomeDirectory /var/empty
  67             sudo dscl . -create /Users/#{u} PrimaryGroupID #{uid.to_s}
  68             sudo dscl . -create /Users/#{u} UniqueID #{uid.to_s}
  69             sudo dscl . -create /Users/#{u} Password "*"
  70             sudo dscl . -create /Users/#{u} RealName "lldpd privilege separation user"
  71       EOS
  72       return s
  73     end
  74   end
  75
  76   plist_options :startup => true
  77
  78   def plist
  79     additional_args = ""
  80     additional_args += "<string>-x</string>" if build.with? "snmp"
  81     <<~EOS
  82       <?xml version="1.0" encoding="UTF-8"?>
  83       <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
  84       <plist version="1.0">
  85       <dict>
  86         <key>Label</key>
  87         <string>#{plist_name}</string>
  88         <key>ProgramArguments</key>
  89         <array>
  90           <string>#{opt_sbin}/lldpd</string>
  91           #{additional_args}
  92         </array>
  93         <key>RunAtLoad</key><true/>
  94         <key>KeepAlive</key><true/>
  95       </dict>
  96       </plist>
  97     EOS
  98   end
  99 end