/usr/share/ircII/script/whowas is in ircii 20151120-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | #	$eterna: whowas,v 1.2 2001/08/12 15:57:12 mrg Exp $
#
# Tame the WHOWAS history!
# by Mycroft (mycroft@ai.mit.edu)
# 311 312 313 314 316 317 318 319 353 401 changed for 2.2.2 (server == $0)
ALIAS STRIPCHAN {
  assign function_return $strip(#+-*/\\={}[]<>!@$$%^~`,?:|'\". $0-)
}
ALIAS PURGE {
  foreach $0 i
  {
    purge $0.$i
  }
  ^assign -i
  ^assign -$0
}
ALIAS WHOIS {
  purge whowas.$stripchan($0)
  //whois $0
}
ALIAS WHOWAS {
  purge whowas.$stripchan($0)
  //whowas $0
}
ON #^SEND_MSG 69 * {
  purge whowas.$stripchan($0)
}
ON #^SEND_NOTICE 69 * {
  purge whowas.$stripchan($0)
}
ON #^CONNECT 69 * {
  purge whowas
}
ON #^TIMER 69 * {
  foreach whowas i
  {
    if (time() - whowas.$(i).time > 60)
    {
      purge whowas.$i
    }
  }
  assign -i
}
ON ^311 * {
  _whowas_314 is $1-
  assign -whowas.last
}
ON ^319 * {
  echo *** on channels: $1-
}
ON ^301 * {
  echo *** $0 is away: $1-
}
ON ^313 * {
  echo *** $1 is an IRC operator
}
ON ^317 * {
  if ([$2] == [1])
  {
    echo *** $1 has been idle 1 second
  }
  {
    echo *** $1 has been idle $2 seconds
  }
}
ON ^314 * {
  _whowas_start $stripchan($1) $1-
}
ALIAS _WHOWAS_START {
  assign whowas.$0.314 $1-
  assign whowas.$0.time $time()
  assign whowas.last $0 $stripchan($2).$stripchan($3)
}
ON ^312 * {
  if (whowas.last)
  {
    _whowas_do $whowas.last $stripchan($1) $1-
  }
  {
    _whowas_312 $1-
  }
}
ALIAS _WHOWAS_DO {
  if ([$(whowas.$0.past.$1.$2)])
  {
  }
  {
    assign whowas.$0.past.$1.$2 1
    assign whowas.$0.312 $3-
    _whowas_314 was $(whowas.$0.314)
    _whowas_312 $3-
  }
  assign -whowas.last
}
ALIAS _WHOWAS_314 {
  if ([$5] == [*])
  {
    echo *** $2 $0 $3@$4 \($6-)
  }
  {
    echo *** $2 $0 $3@$4 \($6-) on channel $5
  }
}
ALIAS _WHOWAS_312 {
  echo *** on irc via server $1 \($2-)
}
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