Summary:

	pam_if is a PAM "meta-module" allowing you to execute other
	modules conditionally.

Usage:

	pam_if.so options... -- module argument...

Options:

	user=N		username matches shell pattern N
	tty=N		terminal matches s.p. N
	rhost=N		rhost matches s.p. N
	debug		explain mismatches

Example:

	Let's say you want to allow pam_pwdb authentication for console
	logins only and require pam_very_secure_module for everything else.
	Here is the appropriate /etc/pam.d/login:

	auth       required     pam_nologin.so
	auth       sufficient   pam_if.so tty=/dev/tty[0-9]* -- \
	                              pam_pwdb.so shadow nullok
	auth       required     pam_very_secure_module.so
	account    required     pam_pwdb.so
	session    required     pam_pwdb.so

Author:

	Pavel Kankovsky <kan@dcit.cz>
	Aug 22, 2001

Credits:

	Elliot Lee for pam_listfile
	Marc Ewing and Andrew G. Morgan for pam_handlers

Changes:

	* Aug 22, 2001
	- debug messages for user= and rhost= fixed (fix by
	  Niccolo Rigacci)...oh yes, copy and paste programming
	  considered harmful

	* Oct 9, 2000
	- rhost option bug fixed (reported by Kenneth R. Mort)
	- missing check of malloc() return value added
	- memory freed properly in relay()
	- miscellaneous typos fixed

	* Jan 7, 1999
	- 1st version released