The software in this repository is under a number of licenses:

 src/getgr      LGPL v2.1+
 src/inotify    LGPL v2.1+
 src/nslcd      LGPL v2.1+
 src/dl         GPL v2+, with documentation output clarification
 src/nshd       GPL v2+
 src/sd_daemon  Apache v2.0
 test/          LGPL v2.1+

The general notion is that the core application is GPL, while
supporting libraries that might be useful outside of this specific
application are LGPL, with the 2 exceptions:
 - The sd_daemon package is Apache licensed because of code taken from
   CoreOS and Docker.
 - The dl package is GPLv2+ licensed because of wording in comments
   taken from the Linux Programmer's Manual.

For more details, see each individual file.