bionic (1) resolv_wrapper.1.gz

Provided by: libresolv-wrapper_1.1.5-1_amd64 bug

NAME
       resolv_wrapper - A wrapper for dns name resolving or dns faking.


SYNOPSIS
       LD_PRELOAD=libresolv_wrapper.so RESOLV_WRAPPER_CONF="/path/to/resolv.conf" ./myapplication


DESCRIPTION
       resolv_wrapper makes it possible on most UNIX platforms to contact your own DNS implementation in your
       test environment. It requires socket_wrapper to be able to contact it. If it doesn’t work on a special
       platform the wrapper is able to fake DNS queries and return valid responses to your application.

       •   Redirects name queries to the nameservers specified in your resolv.conf

       •   Can fake DNS queries using a simple formatted DNS hosts file.


ENVIRONMENT VARIABLES
       RESOLV_WRAPPER_CONF
           This is used to specify the resolv.conf to use. The format of the resolv.conf file is defined in the
           manpage resolv.conf(5). Currently only the namserver directive is supported.

       RESOLV_WRAPPER_HOSTS
           This environment variable is used for faking DNS queries. It must point to a hosts-like text file
           that specifies fake records for custom queries. The format of the file looks like this:

               TYPE    RECORD_NAME RECORD_VALUE

       For example:

           A       dc.cwrap.org 127.0.0.10
           AAAA    dc.cwrap.org fd00::5357:5f0a
           CNAME   kerberos.cwrap.org dc.cwrap.org
           SRV     _kerberos._tcp.cwrap.org kerberos.cwrap.org 88
           URI     _vpn.cwrap.org https://vpn.cwrap.org/VPN

       RESOLV_WRAPPER_DEBUGLEVEL
           If you need to see what is going on in resolv_wrapper itself or try to find a bug, you can enable
           logging support in resolv_wrapper if you built it with debug symbols.

           •   0 = ERROR

           •   1 = WARNING

           •   2 = DEBUG

           •   3 = TRACE


EXAMPLE
       The following command would trick kinit(1) into using DNS servers from "./resolv.conf" for Kerberos
       service resolution:

           $ LD_PRELOAD=libresolv_wrapper.so RESOLV_WRAPPER_CONF="./resolv.conf" kinit user@EXAMPLE.COM

                                                   2015-08-18                                  RESOLV_WRAPPER(1)