Your first problem is that the format of ifconfig -a may be different on different platforms. For example:

[root]# uname -s
Linux
[root]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:C0:9F:XX:XX:XX  
          inet addr:64.x.x.x  Bcast:64.x.x.x  Mask:255.255.254.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:193891504 errors:0 dropped:0 overruns:0 frame:0
          TX packets:153456331 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:1718775511 (1639.1 Mb)  TX bytes:3265401055 (3114.1
+ Mb)
          Interrupt:16 Base address:0xecc0 Memory:fe100000-fe120000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:56540745 errors:0 dropped:0 overruns:0 frame:0
          TX packets:56540745 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2665326103 (2541.8 Mb)  TX bytes:2665326103 (2541.8
+ Mb)
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Anyway you need to find a good way to chunkify the data into records. Assuming you get it in a scalar split "\n\n" should probably do the trick. Then the first string in your chunk is the interface name and m/status:\s+(\S+)/ will give your status. That won't work on Linux.

for my $chunk (split "\n\n", $data) {
    my ($if) = $chunk =~ m/^(\S+)/;
    my ($status) = $chunk =~ m/status:\s*(\S+)/;
    print "$if: $status\n";
}
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