Shell Programming and Scripting

Hi there, I have a Solaris machine with an ifconfig output similar to below

Code:

lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000 
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 10.0.0.1 netmask ffff0000 broadcast 10.0.255.255
        ether 0:14:4f:1f:xx:xx 
e1000g0:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 10.0.0.2 netmask ffff0000 broadcast 10.0.255.255
e1000g0:2: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 2
        zone virtual-server67
        inet 10.0.0.3 netmask ffff0000 broadcast 10.0.255.255
e1000g0:3: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 2
        zone virtual-server68
        inet 10.0.0.4 netmask ffff0000 broadcast 10.0.255.255

As you can see I have one physical interface called e1000g0 and three subsequent virtual interfaces on e1000g0. The first one is just a regular secondary virtual interface, but the second and third are attached to Solaris Zones (virtual servers) and subsequently have an extra line in the output defining the zone it is attahced to (in red above). I have to write a process that will cycle through theses 4 interfaces (in this case 1 physical and 3 virtual) populating a variable, lets call it VAR, with the virtual server name found on the lines highlighted in red above (additional example below)

Code:

zone virtual-server68

But where there is no "zone <virtualserver name>" line for an interface, be it Physical or Virtual (as with e1000g0 and e1000g0:1) I want to just poulate VAR with a "-"

My question is really, whilst I am happy using awk to set VAR with the value of that line if it existed on ALL interfaces, I am a little unsure as to how I use it to make the determination of whether the line exists for a interface then either grab the value or set it to "-" accordingly ?

would i need to use a mixture of tools to achieve this or can it all be done within awk?

any help on this would be greatly appreciated

Code:

$ cat Test
VAR=( $(awk '
 /^e10/ { Z[++C] = "-"; next }
 /zone/ { Z[C] = $2 }
 END { for( D = 1; D <= C; D++ )
         printf "%s ", Z[D]
 }
' file1))

echo ${VAR[0]}
echo ${VAR[1]}
echo ${VAR[2]}
echo ${VAR[3]}

$ ./Test
-
-
virtual-server67
virtual-server68

A little simpler

Code:

awk '
 /^e10/ { if( C++ ) print Z?Z:"-"; Z = "" }
 /zone/ { Z=$2 }
 END { print Z?Z:"-" }
'

thats great, helps me out wit a problem I have too