PAM_SHELLS(8)                  Linux-PAM Manual                  PAM_SHELLS(8)

NAME
       pam_shells - PAM module to check for valid login shell

SYNOPSIS
       pam_shells.so

DESCRIPTION
       pam_shells is a PAM module that only allows access to the system if the
       user's shell is listed in /etc/shells.

       It also checks if needed files (e.g.  /etc/shells) are plain files and
       not world writable.

OPTIONS
       This module does not recognise any options.

MODULE TYPES PROVIDED
       The auth and account module types are provided.

RETURN VALUES
       PAM_AUTH_ERR
           Access to the system was denied.

       PAM_SUCCESS
           The user's login shell was listed as valid shell in /etc/shells.

       PAM_USER_UNKNOWN
           The user does not exist or the user's login shell could not be
           determined.

       PAM_SERVICE_ERR
           The module was not able to get the name of the user.

EXAMPLES
           auth  required  pam_shells.so



SEE ALSO
       shells(5), pam.conf(5), pam.d(5), pam(8)

AUTHOR
       pam_shells was written by Erik Troan <ewt@redhat.com>.

Linux-PAM                         04/09/2024                     PAM_SHELLS(8)