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Full Discussion: Awk, if line after string does not match insert
Top Forums Shell Programming and Scripting Awk, if line after string does not match insert Post 302862919 by Akshay Hegde on Friday 11th of October 2013 04:03:55 PM
Old 10-11-2013
Quote:
Originally Posted by numele
I have a large file with interface records. I need to check every record that has the string "encapsulation bridge1483" and if the next line after this does not have "ip description" then I need to insert a line to add "ip description blah_blah_blah.

Sample file:
Code:
interface atm 1/0.190158 point-to-point
 atm pvc 100190158 19 158 aal5snap 768 768 10
 encapsulation pppoe
! 
interface atm 1/0.190158.1
 encapsulation ppp
 ppp authentication pap
 profile any "prof-pppoe"
! 
interface atm 1/0.20203 point-to-point
 atm pvc 100020203 2 203 aal5snap 1500 1500 10
 encapsulation bridge1483
 ip address 10.132.1.1 255.255.255.248
!
interface atm 1/0.80180 point-to-point
 atm pvc 100080180 8 180 aal5snap 3000 3000 10
 encapsulation bridge1483
 ip description won_ton_soup_company
 ip address 10.42.3.1 255.255.255.248
!
interface atm 1/0.100115 point-to-point
 atm pvc 100100115 10 115 aal5snap 6000 6000 10
 encapsulation bridge1483
 ip description dickandjanes
 ip address 10.2.3.1 255.255.255.248
!

What I need to have output:
Code:
interface atm 1/0.190158 point-to-point
 atm pvc 100190158 19 158 aal5snap 768 768 10
 encapsulation pppoe
! 
interface atm 1/0.190158.1
 encapsulation ppp
 ppp authentication pap
 profile any "prof-pppoe"
! 
interface atm 1/0.20203 point-to-point
 atm pvc 100020203 2 203 aal5snap 1500 1500 10
 encapsulation bridge1483
ip description blah_blah_blah
 ip address 10.132.1.1 255.255.255.248
!
interface atm 1/0.80180 point-to-point
 atm pvc 100080180 8 180 aal5snap 3000 3000 10
 encapsulation bridge1483
 ip description won_ton_soup_company
 ip address 10.42.3.1 255.255.255.248
!
interface atm 1/0.100115 point-to-point
 atm pvc 100100115 10 115 aal5snap 6000 6000 10
 encapsulation bridge1483
 ip description dickandjanes
 ip address 10.2.3.1 255.255.255.248
!



Try

Code:
$ awk '/encapsulation bridge1483/{print;getline;if($0!~/ip description/)print "ip description blah_blah_blah"}1'  file

Code:
interface atm 1/0.190158 point-to-point
 atm pvc 100190158 19 158 aal5snap 768 768 10
 encapsulation pppoe
! 
interface atm 1/0.190158.1
 encapsulation ppp
 ppp authentication pap
 profile any "prof-pppoe"
! 
interface atm 1/0.20203 point-to-point
 atm pvc 100020203 2 203 aal5snap 1500 1500 10
 encapsulation bridge1483
ip description blah_blah_blah
 ip address 10.132.1.1 255.255.255.248
!
interface atm 1/0.80180 point-to-point
 atm pvc 100080180 8 180 aal5snap 3000 3000 10
 encapsulation bridge1483
 ip description won_ton_soup_company
 ip address 10.42.3.1 255.255.255.248
!
interface atm 1/0.100115 point-to-point
 atm pvc 100100115 10 115 aal5snap 6000 6000 10
 encapsulation bridge1483
 ip description dickandjanes
 ip address 10.2.3.1 255.255.255.248
!

This User Gave Thanks to Akshay Hegde For This Post:
numele
 

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