无法理解awk scrpt[重复]

我在理解这个gawk命令时遇到了问题。总之,它根据某些条件解析两个日志(本地访问)Tomcat日志文件。

以下是函数:

gawk 'function getip(rec) {n=split(rec,a,"\"");
        split(a[n-1],ip,",");return ip[1]}
    $10 ~ /302/ && $6 ~ /POST/ && $7 ~ /^\/sso\/lfe\/ui\/login/
    {lfe_user_ip=getip($0);
        user_path[lfe_user_ip]=user_path[lfe_user_ip]"_login-302"}
    /\/sso\/pfe\/rs\/profile\/customer/ && $6 ~ /PUT/
    {pfe_user_ip=getip($0);
        if (user_path[pfe_user_ip] ~ /_login-302/) {
            if ($10 ~ /200/) successful_redirect_conversion+=1;
            else failed_redirect_conversion+=1;} }
    END {print successful_redirect_conversion, failed_redirect_conversion}' \
        localhost_kff_access_log.2017-10-09.txt \
  /ses/var/late/dev001/tomcat/kfc/s002/logs/localhost_kfc_access_log.2017-10-09.txt

我不明白的是 split 方法以及路径的转义:

$7 ~ /^\/sso\/lfe\/ui\/login/