$logging

Enables logging when set to true. Can be set at runtime.

$logdir

Path to package log file directory

log_pipe()

Passes stdin to stdout, saving a copy to file ($1).

log_filename()

Returns log filename given its base name ($1).

log_rotate()

Rotates log file ($1), saving n ($2) old files.

$1 - Log file name

$2 - Integer number of log files to save.