. - read and execute commands from a file in the current shell environment.
. file [argument ...]
. is a POSIX special builtin provided by Rush. It reads and executes commands from a file in the current shell environment. When file contains no slash, Rush searches PATH.
Additional operands initialize the positional parameters seen by the sourced script.
This page summarizes the builtin in Rush documentation. POSIX is the normative reference for detailed portable behavior.
See the POSIX definition for command-specific status rules. Usage errors generally return a non-zero status.
rush-builtins(7), source(1), POSIX Shell Command Language.