OS and Software > All Things Unix > grep (awk, sed) help

#!/usr/bin/awk -f                                                             

BEGIN {
    prev = ""
    skip = "YES"
}

{
    if (/mypattern/) {
        skip = "YES"
    } else {
        if ("NO" == skip) {
            print prev
        }

        prev = $0
        skip = "NO"
    }
}

END {
    if ("NO" == skip) {
        print prev
    }
}