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PAM_LIST(5)							   PAM_LIST(5)

NAME
       pam_list - PAM account management module for UNIX

SYNOPSIS
	pam_list.so.1

DESCRIPTION
       The  pam_list  module implements pam_sm_acct_mgmt(3PAM), which provides
       functionality to the PAM account management stack.  The module provides
       functions  to  validate	 that	the  user's account  is	 valid on this
       host based on a list of users and/or netgroups in the given  file.  The
       users  and  netgroups are separated by newline character. Netgroups are
       specified with character '@' as prefix before name of netgroup  in  the
       list. The maximum line lenght is 1023 characters.

       The  username  is  the  value  of  PAM_USER.  The  host is the value of
       PAM_RHOST or, if PAM_RHOST is not set, the value of  the	 localhost  as
       returned by gethostname(3C) is used.

       If  neither  of	the  allow, deny, or compat options are specified, the
       module will look for +/- entries in the	local  /etc/passwd  file.   If
       this style is used, nsswitch.conf(4) must not be configured with compat
       for the passwd database. If no relevant +/- entry exists for the	 user,
       pam_list is not participating in result.

       If compat option is specified then the module will look for +/- entries
       in the local /etc/passwd file. Other  entries  in  this	file  will  be
       counted as + entries. If no relevant entry exits for the user, pam_list
       will deny the access.

       The following options can be passed to the module:

       allow=
			  The full pathname to a file of allowed users	and/or
			  netgroups. Only one of allow= or deny= can be speci‐
			  fied.

       compat
			  Activate compat mode.

       deny=
			  The full pathname to a file of denied	 users	and/or
			  netgroups. Only one of deny= or allow= can be speci‐
			  fied.

       debug
			  Provide  syslog(3C)  debugging  information  at  the
			  LOG_AUTH | LOG_DEBUG level.

       user
			  The  module  should only perform netgroup matches on
			  the username. This is the default option.

       nouser
			  The username should not  be  used  in	 the  netgroup
			  match.

       host
			  Only the host should be used in netgroup matches.

       nohost
			  The hostname should not be used in netgroup matches.

       user_host_exact
			  The user and hostname must be in the same netgroup.

ERRORS
       The following error values are returned:

       PAM_SERVICE_ERR
			   An  invalid	set of module options was given in the
			   pam.conf(4) for this module, or  the	 user/netgroup
			   file could not be opened.

       PAM_BUF_ERR
			   A memory buffer error occurred.

       PAM_IGNORE
			   The	module	is ignored, as it is not participating
			   in the result.

       PAM_PERM_DENIED
			   The user is not on the allow list or is on the deny
			   list.

       PAM_SUCCESS
			   The account is valid for use at this time.

       PAM_USER_UNKNOWN
			   No account is present for the user

EXAMPLES
       Example 1 Using pam_list in default mode

       /etc/pam.conf modification looks like:

	 other	 account requisite	 pam_roles.so.1
	 other	 account required	 pam_unix_account.so.1
	 other	 account required	 pam_list.so.1

       In  the	case  of  default  mode or compat mode, the important lines in
       /etc/passwd appear as follows:

	 +loginname	- user is approved
	 -loginname	- user is disapproved
	 +@netgroup	- netgroup members are approved
	 -@netgroup	- netgroup members are disapproved

       Example 2 Using pam_list with allow file

       /etc/pam.conf modification looks like:

	 other	 account requisite	 pam_roles.so.1
	 other	 account required	 pam_unix_account.so.1
	 other	 account required	 pam_list.so.1 allow=etc/user.allow

       /etc/users.allow contains:

	 root
	 localloginname
	 remoteloginname
	 @netgroup

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌────────────────────┬─────────────────────────┐
       │  ATTRIBUTE TYPE    │	  ATTRIBUTE VALUE     │
       ├────────────────────┼─────────────────────────┤
       │Interface Stability │ Committed		      │
       ├────────────────────┼─────────────────────────┤
       │MT-Level	    │ MT-Safe with exceptions │
       └────────────────────┴─────────────────────────┘

       The interfaces in libpam(3LIB) are MT-Safe only if each	thread	within
       the multithreaded application uses its own PAM handle.

SEE ALSO
       pam(3PAM),  pam_authenticate(3PAM), pam_sm_acct_mgmt(3PAM), syslog(3C),
       libpam(3LIB), nsswitch.conf(4), pam.conf(4), attributes(5)

				 Mar 26, 2009			   PAM_LIST(5)
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