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6.36. pam_umask - set the file mode creation mask
6.36. pam_umask - set the file mode creation mask
Prev Chapter 6. A reference guide for available modules Next

6.36. pam_umask - set the file mode creation mask

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

6.36.1. 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:

  • umask= entry in the user's GECOS field

  • umask= argument

  • UMASK entry from /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.

6.36.2. 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).

umask=mask

Sets the calling process's file mode creation mask (umask) to mask & 0777. The value is interpreted as Octal.

6.36.3. MODULE TYPES PROVIDED

Only the session type is provided.

6.36.4. RETURN VALUES

PAM_SUCCESS

The new umask was set successfully.

PAM_SERVICE_ERR

No username was given.

PAM_USER_UNKNOWN

User not known.

6.36.5. 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

6.36.6. AUTHOR

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

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6.35. pam_timestamp - authenticate using cached successful authentication attempts Home 6.37. pam_unix - traditional password authentication

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