pam_umask(8) — Linux manual page

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

NAME         top

       pam_umask - PAM module to set the file mode creation mask

SYNOPSIS         top

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

DESCRIPTION         top

       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:

       •   umask= argument

       •   umask= entry in the user's GECOS field

       •   UMASK= entry from /etc/default/login

       •   UMASK entry from /etc/login.defs

       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         top

       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         top

       Only the session type is provided.

RETURN VALUES         top

       PAM_SUCCESS
           The new umask was set successfully.

       PAM_SERVICE_ERR
           No username was given.

       PAM_USER_UNKNOWN
           User not known.

EXAMPLES         top

       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         top

       pam.conf(5), pam.d(5), pam(8)

AUTHOR         top

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

COLOPHON         top

       This page is part of the linux-pam (Pluggable Authentication
       Modules for Linux) project.  Information about the project can be
       found at ⟨http://www.linux-pam.org/⟩.  If you have a bug report
       for this manual page, see ⟨//www.linux-pam.org/⟩.  This page was
       obtained from the tarball Linux-PAM-1.3.0.tar.bz2 fetched from
       ⟨http://www.linux-pam.org/library/⟩ on 2021-06-20.  If you
       discover any rendering problems in this HTML version of the page,
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       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

Linux-PAM Manual               04/01/2016                   PAM_UMASK(8)

Pages that refer to this page: systemd.exec(5)

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