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55 lines
1.3 KiB
ReStructuredText
55 lines
1.3 KiB
ReStructuredText
.. _cmd-block:
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block - temporarily block delivery of events
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============================================
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Synopsis
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--------
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::
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block [OPTIONS...]
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Description
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-----------
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``block`` prevents events triggered by ``fish`` or the :ref:`emit <cmd-emit>` command from being delivered and acted upon while the block is in place.
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In functions, ``block`` can be useful while performing work that should not be interrupted by the shell.
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The block can be removed. Any events which triggered while the block was in place will then be delivered.
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Event blocks should not be confused with code blocks, which are created with ``begin``, ``if``, ``while`` or ``for``
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The following parameters are available:
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- ``-l`` or ``--local`` Release the block automatically at the end of the current innermost code block scope
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- ``-g`` or ``--global`` Never automatically release the lock
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- ``-e`` or ``--erase`` Release global block
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Example
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-------
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::
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# Create a function that listens for events
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function --on-event foo foo; echo 'foo fired'; end
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# Block the delivery of events
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block -g
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emit foo
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# No output will be produced
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block -e
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# 'foo fired' will now be printed
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Notes
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-----
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Note that events are only received from the current fish process as there is no way to send events from one fish process to another.
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