pam_umask - PAM module to set the file mode creation mask
pam_umask.so [debug] [silent] [usergroups]
[nousergroups] [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:
•umask= entry in the user's GECOS field
•umask= argument
•UMASK entry from /etc/login.defs (influenced by
USERGROUPS_ENAB in /etc/login.defs)
•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.
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).
nousergroups
This is the direct opposite of the usergroups option
described above, which can be useful in case pam_umask has been compiled with
usergroups enabled by default and you want to disable it at runtime.
umask=mask
Sets the calling process's file mode creation mask
(umask) to mask & 0777. The value is interpreted as Octal.
Only the session type is provided.
PAM_SUCCESS
The new umask was set successfully.
PAM_BUF_ERR
Memory buffer error.
PAM_CONV_ERR
The conversation method supplied by the application
failed to obtain the username.
PAM_INCOMPLETE
The conversation method supplied by the application
returned PAM_CONV_AGAIN.
PAM_SERVICE_ERR
No username was given.
PAM_USER_UNKNOWN
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
<kukuk@thkukuk.de>.