array and string with for-loop and grep

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# 1  
Old 09-09-2011
array and string with for-loop and grep

Hello together,

first of all, iam really a beginner in Shellskripting and i need some help please. Following Task i try to finished:

vmtoolsd --cmd 'info-get guestinfo.ovfEnv' > vmt

In the file vmt are some strings that iam searching for.
For that i try to create a array like:

list=(dns1 dns2 ip gateway netmask) --> The strings that i look for are "dns1", "dns2", and so on...

now i try the following:

list=(dns1 dns2 ip gateway netmask) #is the syntax correctyl?
vmtoolsd --cmd 'info-get guestinfo.ovfEnv' > vmt

for i in $(cat vmt);
if you find "dns1" then save the value"
so what iam trying is following: i want to look after die array values in the vmt file: If the for-loop find "dns1" or "dns2" he should save the ip for that:

the vmt file looks so:

$ cat vmt
<?xml version="1.0" encoding="UTF-8"?>
xmlns="Index of /ovf/environment/1"
xmlnsSmiliee="Index of /ovf/environment/1"
<Kind>VMware ESXi</Kind>
<Vendor>VMware, Inc.</Vendor>
<Property oe:key="dns1" oe:value=""/>
<Property oe:key="dns2" oe:value=""/>
<Property oe:key="gateway" oe:value=""/>
<Property oe:key="ip" oe:value=""/>
<Property oe:key="netmask" oe:value=""/>
<ve:Adapter ve:mac="00:50:56:84:00:0b" ve:network="NLSHOP_145.230.39.128-26"/>

you can see the string "Property" --> there are my values like dns1 a.s.o how can i get the value for that???

i would be very happy if someone could show a solution for that Smilie((

thank you


# 2  
Old 09-09-2011
Instead of putting each individual line in FONT tags, just put the whole thing in one big CODE tag. That'll format it nicely for you.

list=(dns1 dns2 ip gateway netmask) #is the syntax correctyl?

Depends on your shell. It'll work in BASH.

[FONT=Times New Roman][FONT=Times New Roman]vmtoolsd --cmd 'info-get guestinfo.ovfEnv' > vmt

for i in $(cat vmt);

That's a combination useless use of backticks and useless use of cat. When the data's large enough, you might find it silently truncating data and the like. It'll also split on spaces, not just lines.

Instead of that I reccomend this method:
# The IFS="" part prevents it from chopping off leading whitespace.
while IFS="" read LINE
done < vmt

which won't ever truncate the data and won't run into the size limit of a shell variable.

if you find "dns1" then save the value"

Since you appear to have BASH:

$ STR="...DNS1..."
$ KEY="DNS1"
$ VAL=""
$ echo "${STR//$KEY/$VAL}"

# 3  
Old 09-09-2011
Parsing XML can be tricky but since you only want small information you can use something like this with awk:

[mute@geek ~]$ awk -F'"' '/oe:key/ {print $2 OFS $4 }' vmt

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