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= entry in the user's GECOS field

       o   umask= argument

       o   UMASK entry from /etc/login.defs (influenced by USERGROUPS_ENAB in
           /etc/login.defs)

       o   UMASK= entry from /etc/default/login

       The GECOS field is split on comma ',' characters. The module also in
       addition to the umask= entry recognizes pri= entry, which sets the nice
       priority value for the session, and ulimit= entry, which sets the
       maximum size of files the processes in the session can create.

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). Note that using this
           option explicitly is discouraged. pam_umask enables this
           functionality by default if /etc/login.defs enables
           USERGROUPS_ENAB, and the umask is not set explicitly in other
           places than /etc/login.defs (this is compatible with login's
           behaviour without PAM).

       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                  05/18/2018                      PAM_UMASK(8)