doc_src/cmds/block.rst
.. synopsis::
block [(--local | --global)]
block --erase
block delays delivery of all events triggered by fish or the :doc:emit <emit>, thus delaying the execution of any function registered --on-event, --on-process-exit, --on-job-exit, --on-variable and --on-signal until after the block is removed.
Event blocks should not be confused with code blocks, which are created with begin, if, while or for
Without options, block sets up a block that is released automatically at the end of the current function scope.
The following options are available:
-l or --local Release the block automatically at the end of the current innermost code block scope.
-g or --global Never automatically release the lock.
-e or --erase Release global block.
-h or --help Display help about using this command.
::
# Create a function that listens for events
function --on-event foo foo; echo 'foo fired'; end
# Block the delivery of events
block -g
emit foo
# No output will be produced
block -e
# 'foo fired' will now be printed
Events are only received from the current fish process as there is no way to send events from one fish process to another.