how to obtain IP of the machine running a script via CLI?

sneakyimp

I'm using Apple Remote Desktop to launch a single PHP script that I've copied to a large number of Macs. I'm looking for the most effective way to get the IP of the machine executing the PHP script within that PHP script. Thoughts?

bradgrafelman

$_SERVER["SERVER_ADDR"] ?

Weedpacket

127.0.0.1 🙂

bradgrafelman wrote:
$_SERVER["SERVER_ADDR"]?

Not in CLI.

But have a look at the ifconfig shell command.

Weedpacket

127.0.0.1 🙂

bradgrafelman wrote:
$_SERVER["SERVER_ADDR"]?

Not in CLI.

But have a look at the ifconfig shell command.

sneakyimp

Weedpacket;10903502 wrote:
127.0.0.1 🙂

You bastard.:glare:

I was thinking it is kind of disappointing that $SERVER doesn't have some obvious thing for CLI to report the IP address but then I realized that a computer can have multiple IP addresses. That makes the $SERVER var a bit more interesting because it reports some stuff about where you might be SSH'ing from.

So these macs they got no iconfig:

My-Mac:~ sneakyimp$ iconfig
-bash: iconfig: command not found

There is ifconfig which barfs out all kinds of stuff:

My-Mac:~ sneakyimp$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
        inet 127.0.0.1 netmask 0xff000000
        inet6 ::1 prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::222:41ff:fe28:91db%en0 prefixlen 64 scopeid 0x4
        inet 192.168.1.100 netmask 0xffffff00 broadcast 192.168.1.255
        ether 00:22:41:28:91:db
        media: autoselect (100baseTX <full-duplex>) status: active
        supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        ether 00:21:e9:e2:b3:28
        media: autoselect (<unknown type>) status: inactive
        supported media: autoselect
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
        lladdr 00:22:41:ff:fe:4a:9f:ac
        media: autoselect <full-duplex> status: inactive
        supported media: autoselect <full-duplex>

I also found ipconfig which requires that you ask about a particular network interface. I'm guessing en0 might be a pretty good assumption for most Macs:

My-Mac:~ sneakyimp$ ipconfig getifaddr en0
192.168.1.100

There's also the hostname command which might be interesting.

My-Mac:~ sneakyimp$ hostname
My-Mac.local

I'm really just trying to encourage my little mac servers to identify themselves somehow so I can distinguish them in the log files.

EDIT: fixed brackets.

sneakyimp

This basically does what I want without complaining, but seems a bit roundabout

exec('hostname', $output);
echo gethostbyname($output[0]);

bradgrafelman

Would a computer name perhaps suffice? I'm not very well versed in Macs, but would the $_ENV array perhaps hold some useful information to identify them?

sneakyimp

There's no hostname or anything like that in $ENV. This script:

print_r($_ENV);

will output this when run via CLI on a Mac:

Array
(
    [MANPATH] => /usr/share/man:/usr/local/share/man:/usr/X11/man
    [TERM] => xterm
    [SHELL] => /bin/bash
    [SSH_CLIENT] => 192.168.1.101 2474 22
    [OLDPWD] => /Users/sneakyimp
    [SSH_TTY] => /dev/ttys000
    [USER] => sneakyimp
    [MAIL] => /var/mail/sneakyimp
    [PATH] => /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin
    [PWD] => /Users/sneakyimp/Desktop
    [SHLVL] => 1
    [HOME] => /Users/sneakyimp
    [LOGNAME] => sneakyimp
    [SSH_CONNECTION] => 192.168.1.101 2474 192.168.1.100 22
    [_] => ./chump.php
)

Looks like you could parse some kind of IP from the SSH_CONNECTION value. I'm wondering if that exists when you run it via ARD? I reckon I'll need to do a test.

sneakyimp

There is even less information when running the same script via ARD:

MyOtherMac (192.168.1.4)
Array
(
    [USER] => userX
    [PATH] => /bin:/sbin:/usr/bin:/usr/sbin:/System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support
    [PWD] => /
    [SHLVL] => 1
    [HOME] => /Users/userX
    [_] => /Users/userX/Desktop/chump.php
    [__CF_USER_TEXT_ENCODING] => 0x1F5:0:0
)