Question

I am on AIX system. But grep on AIX does not support -B, -A, -M on AIX system. Are there other solutions like awk or sed which can do the same job?

For example:

str1
str2
str3
str4
str9
str8
str1
str3
str2

I try to run grep str3 -m 1 -B 1 -A 1 to get:

str2
str3
str4

but it does not work on AIX. Is there any solution for sed or awk?

Answer 1

 awk 'c&&c--;/str3/{print p;print $0;c=1}{p=$0}' file