Description of problem:

If one provides a list of groups containing a space, you get an error. This is easy to do when a shell script calls out to useradd with user-provided data (see for example bug #1126365).


Version-Release number of selected component (if applicable):

shadow-utils-4.1.5.1-8

How reproducible:

Inherent. (And documented in the man page.)


Steps to Reproduce:
1. sudo useradd foo --groups wheel,adm
2. sudo useradd bar --groups "wheel, adm"

Actual results:

First one works, but second says "useradd: group ' adm' does not exist".

Expected results:

Both should work -- strip leading or trailing spaces

Additional info:

groupadd does not permit the creation of groups containing spaces