shadow/etc/pam.d/su

#%PAM-1.0
# /etc/pam.d/su - sample PAM config file for the `su' service
auth		sufficient	pam_rootok.so
auth		required	pam_unix_auth.so
account		required	pam_unix_acct.so
session         required        pam_env.so
[svn-upgrade] Integrating new upstream version, shadow (19990709) 2007-10-07 17:14:02 +05:30			`#%PAM-1.0`
			# /etc/pam.d/su - sample PAM config file for the `su' service
			`auth sufficient pam_rootok.so`
			`auth required pam_unix_auth.so`
			`account required pam_unix_acct.so`
[svn-upgrade] Integrating new upstream version, shadow (4.0.7) 2007-10-07 17:15:58 +05:30			`session required pam_env.so`