modify multiple stanzas 1

[w5000]

hello,

the input file contains:

aaaaaaaaaaaaaaa
bbbbbbbbbbbbbbb
ccccccccccccccc
some header
sssssssssssssss

cfg:
     test=a
     nc=3
     mode=vvv
     nl=7

cfg:
     test=b
     nc=1
     mode=vvv
     nl=5

There are many "cfg:" stanzas in the file. What I need it to replace each nl's value in each cfg: stanza with corresponding nc's in that stanza so finally get output from example above:

aaaaaaaaaaaaaaa
bbbbbbbbbbbbbbb
ccccccccccccccc
some header
sssssssssssssss

cfg:
     test=a
     nc=3
     mode=vvv
     nl=3

cfg:
     test=b
     nc=1
     mode=vvv
     nl=1

best regards.

 

[PHV]

A starting point:

awk '/nl=/{print c;next}/nc=/{c=$0;sub(/nc=/,"nl=",c)}1' /path/to/input

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[w5000]

incredible, it does the job!
thank you very much.