PAM_UMASK(8) Linux-PAM Manual PAM_UMASK(8)
pam_umask - PAM module to set the file mode creation mask
pam_umask.so [debug] [silent] [usergroups] [umask=mask]
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 in the user's GECOS field
o UMASK= entry from /etc/default/login
o UMASK entry from /etc/login.defs (influenced by USERGROUPS_ENAB in
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.
Print debug information.
Don't print informative messages.
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).
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.
The new umask was set successfully.
No username was given.
User not known.
Add the following line to /etc/pam.d/login to set the user specific
umask at login:
session optional pam_umask.so umask=0022
pam.conf(5), pam.d(5), pam(7)
pam_umask was written by Thorsten Kukuk <email@example.com>.
Linux-PAM Manual 01/16/2014 PAM_UMASK(8)
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