Problem with memcached graphs and nc command arguments

[Roman Vynar]

We have the following to get memcached graphs in cacti/scripts/ss_get_by_ssh.php:

$nc_cmd = 'nc -C -q1'; # How to invoke netcat
...
   return "echo \"stats\nquit\" | $nc_cmd $srv $prt";

This results in:

Debian:
------------------
root@debian:~# echo "stats\nquit" | nc -C -q1 localhost 11211
nc: invalid option -- 'C'
nc -h for help
root@debian:~# echo "stats\nquit" | nc -q1 localhost 11211
ERROR
root@debian:~# echo stats | nc -q1 localhost 11211
STAT pid 2006
...
>>> that's ok
root@debian:~# echo stats | nc localhost 11211
STAT pid 2006
...
>>> stuck, needs CRLF

CentOS/RHEL:
------------------
[root@centos ~]# echo "stats\nquit" | nc -C -q1 localhost 11211
nc: invalid option -- 'q'
usage: nc [-46DdhklnrStUuvzC] [-i interval] [-p source_port]
   [-s source_ip_address] [-T ToS] [-w timeout] [-X proxy_version]
   [-x proxy_address[:port]] [hostname] [port[s]]
[root@centos ~]# echo "stats\nquit" | nc -C localhost 11211
ERROR
[root@centos ~]# echo stats | nc -C localhost 11211
STAT pid 31391
...
>>> that's ok
[root@centos ~]# echo stats | nc localhost 11211
STAT pid 31391
...
>>> that's ok

Ubuntu:
------------------
Works with both -C -q1 and w/0 options at all.

So it would be good to change the code to conform most of the cases to:

$nc_cmd = 'nc'; # How to invoke netcat. NOTE, for Debian set 'nc -q1'.
...
   return "echo stats | $nc_cmd $srv $prt";