/usr/bin/irk is in irker 2.12+dfsg-1.
This file is owned by root:root, with mode 0o755.
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 | #! /usr/bin/python
# Illustrates how to test irkerd.
#
# First argument must be a channel URL. If it does not begin with "irc", 
# the base URL for freenode is prepended.
#
# Second argument must be a payload string.  Standard C-style escapes 
# such as \n and \t are decoded.
#
import json
import socket
import sys
import fileinput
def send(s, target, message):
    data = {"to": target, "privmsg" : message}
    #print(json.dumps(data))
    try:
        s.sendall(json.dumps(data))
    except socket.error, e:
        sys.stderr.write("irk: write to server failed: %r\n" % e)
try:
    s = socket.create_connection(("localhost", 6659))
except socket.error, e:
    sys.stderr.write("irk: no irkerd running: %r\n" % e)
    sys.exit(1)
target = sys.argv[1]
if "irc:" not in target and "ircs:" not in target:
    target = "irc://chat.freenode.net/{0}".format(target)
message = " ".join(sys.argv[2:])
message = message.decode('string_escape')
if message == '-':
    for line in fileinput.input('-'):
        send(s, target, line.rstrip('\n'))
else:
    send(s, target, message)
s.close()
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