debian man page for pam_umask

PAM_UMASK(8)							 Linux-PAM Manual						      PAM_UMASK(8)

NAME
       pam_umask - PAM module to set the file mode creation mask

SYNOPSIS
       pam_umask.so [debug] [silent] [usergroups] [umask=mask]

DESCRIPTION
       pam_umask is a PAM module to set the file mode creation mask of the current environment. The umask affects the default permissions assigned
       to newly created files.

       The PAM module tries to get the umask value from the following places in the following order:

       o   umask= argument

       o   umask= entry of the users GECOS field

       o   pri= entry of the users GECOS field

       o   ulimit= entry of the users GECOS field

       o   UMASK= entry from /etc/default/login

       o   UMASK entry from /etc/login.defs

OPTIONS
       debug
	   Print debug information.

       silent
	   Don't print informative messages.

       usergroups
	   If the user is not root and the username is the same as primary group name, the umask group bits are set to be the same as owner bits
	   (examples: 022 -> 002, 077 -> 007).

       umask=mask
	   Sets the calling process's file mode creation mask (umask) to mask & 0777. The value is interpreted as Octal.

MODULE TYPES PROVIDED
       Only the session type is provided.

RETURN VALUES
       PAM_SUCCESS
	   The new umask was set successfully.

       PAM_SERVICE_ERR
	   No username was given.

       PAM_USER_UNKNOWN
	   User not known.

EXAMPLES
       Add the following line to /etc/pam.d/login to set the user specific umask at login:

		   session optional pam_umask.so umask=0022

SEE ALSO
       pam.conf(5), pam.d(5), pam(7)

AUTHOR
       pam_umask was written by Thorsten Kukuk <kukuk@thkukuk.de>.

Linux-PAM Manual						    06/04/2011							      PAM_UMASK(8)