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.
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).
Sets the calling process's file mode creation mask (umask) to
mask & 0777. The value is interpreted as Octal.
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for Linux) project. Information about the project can be found at
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Linux-PAM Manual 04/01/2016 PAM_UMASK(8)