Re: How to display n rows before and after grep ?

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Date: Wed, 23 Feb 2005 11:24:28 +0100

In comp.unix.shell fmarchioni@libero.it:
> Hi all,
> with most Linux distributions I can use

> grep -n or
> grep -C

> to display n rows -before and after- the lines intercepted by grep.

No, those switches have another meaning in GNU grep, you probably
mean "-A"/"-B".

> Unfortunately I cannot find this option on Solaris.
> (I'm using SunOS ultra450 5.8 Generic_108528-27 sun4u sparc
> SUNW,Ultra-4)

> Does anybody know an hack to achieve it, anyway ?
> (egrep, fgrep ... ?)

You can install GNU grep on Solaris, there should be ready to
install packages from Sun available (sunfreeware.com or so).

Alternatively 'ex' should work:

ex -s file <<_HERE_
/match/-3;+3p
q
_HERE_

Or use awk (Perhaps nawk, the awk in $PATH on solaris is
unusable, but there are two others available and mostly
installed)

 awk '/match/ {k=4} k {k--;print}' file

Or use 'sed':

 sed -n '/string/{N;N;N;N;p;}' file

-- 
Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
mail: echo zvpunry@urvzvat.qr | perl -pe 'y/a-z/n-za-m/'
#bofh excuse 224: Jan  9 16:41:27 huber su: 'su root' succeeded
for .... on /dev/pts/1

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