Replace a value in a file


 
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Top Forums Shell Programming and Scripting Replace a value in a file
# 8  
Old 09-18-2011
Code:
root@bt:/tmp# cat f
     1  Open (unit=Lfile1, file='Nc_957.dat')
     2  Open (unit=Lfile1, file='Nc_957.dat')
     3  Open (unit=Lfile1, file='Nc_957.dat')
     4  Open (unit=Lfile1, file='Nc_957.dat')
     5  Open (unit=Lfile1, file='Nc_957.dat')
     6  Open (unit=Lfile1, file='Nc_957.dat')
     7  Open (unit=Lfile1, file='Nc_957.dat')
     8  Open (unit=Lfile1, file='Nc_957.dat')
     9  Open (unit=Lfile1, file='Nc_957.dat')
    10  Open (unit=Lfile1, file='Nc_957.dat')

root@bt:/tmp# awk -v nc="123" '/file=.Nc_/{++i} {if(i==3){i=0; gsub(/Nc_[0-9]*.dat/,"Nc_"nc".dat")}}1 ' f
     1  Open (unit=Lfile1, file='Nc_957.dat')
     2  Open (unit=Lfile1, file='Nc_957.dat')
     3  Open (unit=Lfile1, file='Nc_123.dat')
     4  Open (unit=Lfile1, file='Nc_957.dat')
     5  Open (unit=Lfile1, file='Nc_957.dat')
     6  Open (unit=Lfile1, file='Nc_123.dat')
     7  Open (unit=Lfile1, file='Nc_957.dat')
     8  Open (unit=Lfile1, file='Nc_957.dat')
     9  Open (unit=Lfile1, file='Nc_123.dat')
    10  Open (unit=Lfile1, file='Nc_957.dat')

--ahamed
This User Gave Thanks to ahamed101 For This Post:
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