bash read value function
 

Hello Cracks !
Could someone help me with a bash command, I am not firm in this.
So here is what I need:
my application settings are configured by an config.xml file, so I need for a check reason to read out the ip address specified in this xml.
Looks like follows:
<dhcpModeItf0>0</dhcpModeItf0>
<IpAddrItf0>10.0.0.4</IpAddrItf0>
<IpNetmaskItf0>255.255.0.0</IpNetmaskItf0><firstNtpName>10.0.0.1</firstNtpName>

so I need to specify a variable like a=`command to read out the(sed,awk,grep,find) "IpAddrItf0 Ipaddress" `
the result should be the content of <IpAddrItf0> filed = 10.0.0.4 in my example.

Any idea will be appreciated !
Thanks in advance !

$ cat file
<dhcpModeItf0>0</dhcpModeItf0>
<IpAddrItf0>10.0.0.4</IpAddrItf0>
<IpNetmaskItf0>255.255.0.0</IpNetmaskItf0><firstNtpName>10.0.0.1</firstNtpName>

$ cat doit
#!/bin/bash
IP=$(grep IpAddrItf0 file|sed -e 's/<[^>]*>//g')
echo "IP = $IP"

$ ./doit
IP = 10.0.0.4

wow, easy if I read it, I understand, many thanks !!!!
 

Thanks Cracks !!!!!

hi and thanks again ! Still a little problem in the search function !
 

Hi Cracks, (bash)
first of all, thanks for the idea, really good, but I have a little problem with this proposal.
in my shell it doesnt work always well.
If my *.xml file is structured, line by line this proposal below works well, for e.g. the sequence in xml is looking like:

<IpAddr_1>10.0.0.1</IpAddr_1>
<IpAddr_2>10.0.0.2</IpAddr_2>
<IpAddr_3>10.0.0.3</IpAddr_3>
<IpAddr_4>10.0.0.4</IpAddr_4>

all is working fine, line by line, but I have an xml with different structures looking some times like:
<IpAddr_1>10.0.0.1</IpAddr_1><IpAddr_2>10.0.0.2</IpAddr_2><IpAddr_3>10.0.0.3</IpAddr_3><IpAddr_4>10.0.0.4</IpAddr_4>

in this line the comand

IP=$(grep IpAddrItf0 file|sed -e 's/<[^>]*>//g')

displays me all content of all tags together, like :
1.0.0.110.0.0.210.0.0.310.0.0.4

so as I have this different structures I need a command which searches really for this particular tag and reads out ONLY its content.
Any idea??

Thank you in advance

$ cat file
<IpAddr_1>10.0.0.1</IpAddr_1><IpAddr_2>10.0.0.2</IpAddr_2><IpAddr_3>10.0.0.3</IpAddr_3><IpAddr_4>10.0.0.4</IpAddr_4>
<IpAddr_5>10.0.2.1</IpAddr_5>
<IpAddr_6>10.0.2.2</IpAddr_6>
<IpAddr_7>10.0.2.3</IpAddr_7>
<IpAddr_8>10.0.2.4</IpAddr_8>

$ cat doit
#!/bin/bash
IParray=( $(grep IpAddr_ file|sed 's/<\(IpAddr_.*>\)\(.*\)<\/\1/ \2/g') )
echo "Found ${#IParray[@]} IP Addresses"
echo "IParray = ${IParray[@]}"

$ ./doit
Found 8 IP Addresses
IParray = 10.0.0.1 10.0.0.2 10.0.0.3 10.0.0.4 10.0.2.1 10.0.2.2 10.0.2.3 10.0.2.4


You would access the individual IP Addresses using IParray:
IP0=${IParray[0]}

$ cat file
<IpAddr_1>10.0.0.1</IpAddr_1><IpAddr_2>10.0.0.2</IpAddr_2><IpAddr_3>10.0.0.3</IpAddr_3><IpAddr_4>10.0.0.4</IpAddr_4>
<IpAddr_5>10.0.2.5</IpAddr_5>
<IpAddr_6>10.0.2.6</IpAddr_6>
<IpAddr_7>10.0.2.7</IpAddr_7>
<IpAddr_8>10.0.2.8</IpAddr_8>

$cat doit
#!/bin/bash
sed -ne 's:<ipaddr_[0-9]*>\([^<]*\)</ipaddr_[0-9]*>:\1\
:pgi' "$1" | grep -v '^$'

$ ./doit file
10.0.0.1
10.0.0.2
10.0.0.3
10.0.0.4
10.0.2.5
10.0.2.6
10.0.2.7
10.0.2.8

thanks, I'll try this on monday
 

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thanks, I'll try this on monday
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thanks, I'll try this on monday
 

thanky you very much, I will try this on monday, keep you ionformed.

hi cracks, I tried it, doesn't work, here again a problemdescription
 

Hi Cracks,
to explain more detailed my problem, here below a part of my config.xml file, note, thise file is buildet exactly like below, so the way the colums are displayd is structure like!
here is what i would like to have done by a routine:
1.) find the part in the file starting with the tag "<BBGateway>"
2.) read out the value of the tag "<gatewayIP>?</gatewayIP>, note, this is the only one value i need and this tag could be in this <BBGateway> .... </BBGateway> - structure in various positions.


here my example structure:

<AAGatewayTable>

<BBGateway><parm1>010203</parm1><parm2>0.0.0.0</parm2>
<netmaskDest>0.0.0.0</netmaskDest><gatewayIp>10.10.10.10</gatewayIp>
</BBGateway><GWLastChangeCounter>1</GWLastChangeCounter></AAGatewayTable>

<blabla>..</blabla><blabla>..</blabla><blabla>..</blabla>
<blabla>..</blabla>

<blabla>..</blabla>



I don't know how to manage this, it can not be so difficult to read this out, if I could get a solution, I could use it for more needed tags in this file, as the structure type is always the same.
Thanks Guys,
I appreciate any help !

what have you got so far ? you had some possible ways to solve your problem, so you should have come up with something by now

Note: You must have perl and perl-XML-Simple installed.

hey Kan, thanks it works well !
 

Thank You Kan !