fish-shell/doc_src/cmds/exec.rst

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.. _cmd-exec:
exec - execute command in current process
=========================================
Synopsis
--------
::
exec COMMAND [OPTIONS...]
Description
-----------
``exec`` replaces the currently running shell with a new command. On successful completion, ``exec`` never returns. ``exec`` cannot be used inside a pipeline.
Example
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``exec emacs`` starts up the emacs text editor, and exits ``fish``. When emacs exits, the session will terminate.