/usr/share/mfscgi/chart.cgi is in lizardfs-cgi 3.9.4+dfsg-4.
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 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  | #! /usr/bin/python
import socket
import struct
import cgi
import cgitb; cgitb.enable()
PROTO_BASE = 0
CUTOAN_CHART = (PROTO_BASE+504)
ANTOCU_CHART = (PROTO_BASE+505)
fields = cgi.FieldStorage()
if fields.has_key("host"):
	host = fields.getvalue("host")
else:
	host = ''
if fields.has_key("port"):
	try:
		port = int(fields.getvalue("port"))
	except ValueError:
		port = 0
else:
	port = 0
if fields.has_key("id"):
	try:
		chartid = int(fields.getvalue("id"))
	except ValueError:
		chartid = -1
else:
	chartid = -1
def mysend(socket,msg):
	totalsent = 0
	while totalsent < len(msg):
		sent = socket.send(msg[totalsent:])
		if sent == 0:
			raise RuntimeError, "socket connection broken"
		totalsent = totalsent + sent
def myrecv(socket,leng):
	msg = ''
	while len(msg) < leng:
		chunk = socket.recv(leng-len(msg))
		if chunk == '':
			raise RuntimeError, "socket connection broken"
		msg = msg + chunk
	return msg
if host=='' or port==0 or chartid<0:
	print "Content-Type: image/gif"
	print
	f = open('err.gif')
	print f.read(),
	f.close()
else:
	try:
		s = socket.socket()
		s.connect((host,port))
		mysend(s,struct.pack(">LLL",CUTOAN_CHART,4,chartid))
		header = myrecv(s,8)
		cmd,length = struct.unpack(">LL",header)
		if cmd==ANTOCU_CHART and length>0:
			data = myrecv(s,length)
#               data = s.recv(length)
#               print len(data),length
			if data[:3]=="GIF":
				print "Content-Type: image/gif"
				print
				print data,
			elif data[:8]=="\x89PNG\x0d\x0a\x1a\x0a":
				print "Content-Type: image/png"
				print
				print data,
			elif data[:9]=="timestamp":
				print "Content-Type: text"
				print
				print data,
			else:
				print "Content-Type: image/gif"
				f = open('err.gif')
				print f.read(),
				f.close()
		else:
			print "Content-Type: image/gif"
			print
			f = open('err.gif')
			print f.read(),
			f.close()
		s.close()
	except Exception:
		print "Content-Type: image/gif"
		print
		f = open('err.gif')
		print f.read(),
		f.close()
 |