pam_umask(8) - phpMan

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] [nousergroups] [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).

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.

MODULE TYPES PROVIDED
Only the session type is provided.

RETURN VALUES
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.

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