ajdiaz/dothosts

libdothosts.so
==============

The dothosts library is a LD_PRELOAD based library which allows you to
have a user based hosts file.

The library will catch all calls to gethostbyname(3), gethostbyname2(3),
getaddrinfo(3),gethostbyname_r(3) and gethostbyname2_r(3) and perform
a search of the requested host in a local (i.e. a file into home user
directory) to resolve the hostname. If not found in this file, then proceed
with the regular resolv mechanism.

---- Install ---------------------------------------------------------------

make && make test && make install

If you want to use the 'dothosts' helper, just copy the script to your path.
The make install proccess will not copy helper script.

---- Usage -----------------------------------------------------------------

To use dothosts just type:

  export LD_PRELOAD=path/to/libdothosts.so

And then new applications will use ~/.hosts file as /etc/hosts (the original
/etc/hosts will be also used if host does not match in ~/.hosts).

Aditionally, environment variable DOTHOSTS will use to change the path of
local .hosts file, for exaple:

  export DOTHOSTS=~/.config/hosts

You can use the dothost utility to run an application with library loaded,
in the form:

  dothosts wget http://test

---- Limitations ----------------------------------------------------------

- Only works for programs that use glibc calls to resolve hostnames.
- No working for SUID programs for security reasons.

---- Development ----------------------------------------------------------

For bug report please fill a issue in the github project [1], or send an
email to ajdiaz+dothosts at ajdiaz.me

[1] https://github.com/ajdiaz/dothosts/issues

Any pull-request is also welcome.


Happy Hacking!