Created attachment 1395642 [details]
patch to reorder options on usermod command

Description of problem:
Once installed we receive a failed on command /usr/sbin/usermod --non-unique...
Reordering the command arguments resolves the issue.  Patch provided.

Version-Release number of selected component (if applicable):
mock-1.4.8-1.fc27.noarch

How reproducible:
Always

Steps to Reproduce:
1. mock -r epel-5-x86_64 --shell
2. mock -r epel-5-x86_64 --shell

Actual results:
failed

Expected results:
second attempt should give a shell in mock.  This applies to other commands
such as rebuild or install and is not limited to shell.

Additional info:
There appears to be a bug in a release of EL5's /usr/sbin/usermod command which fails if --non-unique is specified before the -u (uid) option to the command. Moving the --non-unique option to the end resolves the issue.

epel-5-x86_64.cfg:
config_opts['root'] = 'epel-5-x86_64'
config_opts['target_arch'] = 'x86_64'
config_opts['legal_host_arches'] = ('x86_64',)
config_opts['chroot_setup_cmd'] = 'install buildsys-build buildsys-macros'
config_opts['dist'] = 'el5'  # only useful for --resultdir variable subst
if 'macros' not in config_opts:  config_opts['macros'] = {}
config_opts['macros']['%__arch_install_post'] = '%{nil}'
config_opts['releasever'] = '5'
config_opts['use_nspawn'] = False