The user-tmpfs program

The user-tmpfs program prepares a user owned tmpfs for the user defined in the USER environment variable. The user owned tmpfs is created at @tmpfsdir@/@usrrundir@/${USER}.

Interface

     user-tmpfs

• user-tmpfs takes no arguments.
• It reads the USER environment variable, if it is empty it exits 100.
• It reads the USER_TMPFSDIR_SIZE environment variable, defaulting to 64m if undefined.
• It creates the directory @tmpfsdir@/@usrrundir@/${USER}.
• It mounts a tmpfs of size USER_TMPFSDIR_SIZE with its root owned bi USER and mode 0755 at @tmpfsdir@/@usrrundir@/${USER}.

Exit codes

• 100 if a critical environment variable is missing.
• Since user-tmpfs is an execline script, it exits with an approximation of employed program that failed.
• user-tmpfs mostly uses execline and s6 software, the exit behaviour of which can be looked up on their respective documentation.
• See also: execline exit code handling.

Options

• There are no otions to user-tmpfs.

Notes

user-tmpfs is intended to be used in a boot time system supervision tree oneshot service to prepare the user runtime directory of a user. For each user who should have a user runtime directory, there should be a distinct oneshot running user-tmpfs.

Alternatively, user-tmpfs could be run by a login manager after login, but befor initiating the first user supervision tree.