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] [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 • 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). 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(8)
pam_umask was written by Thorsten Kukuk <email@example.com>.
This page is part of the linux-pam (Pluggable Authentication Modules for Linux) project. Information about the project can be found at ⟨http://www.linux-pam.org/⟩. If you have a bug report for this manual page, see ⟨//www.linux-pam.org/⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-06-23. (At that time, the date of the most recent commit that was found in the repository was 2023-06-07.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org Linux-PAM Manual 12/16/2022 PAM_UMASK(8)
Pages that refer to this page: systemd.exec(5)