$FreeBSD: src/contrib/libpam/modules/pam_shells/README,v 1.3.2.2 2001/06/11 15:28:28 markm Exp $ $DragonFly: src/contrib/libpam/modules/pam_shells/Attic/README,v 1.2 2003/06/17 04:24:03 dillon Exp $ pam_shells: Authentication is granted if the users shell is listed in /etc/shells. If no shell is in /etc/passwd (empty), the /bin/sh is used (following ftpd's convention). Also checks to make sure that /etc/shells is a plain file and not world writable. - Erik Troan , Red Hat Software. August 5, 1996.