fish-shell/doc_src/block.txt

\section block block - temporarily block delivery of events

\subsection block-synopsis Synopsis
\fish{synopsis}
block [OPTIONS...]
\endfish

\subsection block-description Description

`block` prevents events triggered by `fish` or the <a href="commands.html#emit">`emit`</a> command from being delivered and acted upon while the block is in place.

In functions, `block` can be useful while performing work that should not be interrupted by the shell.

The block can be removed. Any events which triggered while the block was in place will then be delivered.

Event blocks should not be confused with code blocks, which are created with `begin`, `if`, `while` or `for`

The following parameters 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


\subsection block-example Example

\fish
# 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
\endfish


\subsection notes Notes

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.
Fix casing and other minor issues in documentation darcs-hash:20061031152316-ac50b-e68db9853d6e9461a0c054f1ea290704ccfc0a31.gz 2006-10-31 23:23:16 +08:00			`\section block block - temporarily block delivery of events`
Add missing documentation file darcs-hash:20051214180744-ac50b-9394e5a12ca3eb98a9333a666748d16277cc2d7b.gz 2005-12-15 02:07:44 +08:00
			`\subsection block-synopsis Synopsis`
Simplify styling 2014-08-01 20:25:41 +08:00			`\fish{synopsis}`
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			`block [OPTIONS...]`
			`\endfish`
Add missing documentation file darcs-hash:20051214180744-ac50b-9394e5a12ca3eb98a9333a666748d16277cc2d7b.gz 2005-12-15 02:07:44 +08:00
			`\subsection block-description Description`

Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00			`block` prevents events triggered by `fish` or the <a href="commands.html#emit">`emit`</a> command from being delivered and acted upon while the block is in place.
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00			In functions, `block` can be useful while performing work that should not be interrupted by the shell.
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00			`The block can be removed. Any events which triggered while the block was in place will then be delivered.`
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00			Event blocks should not be confused with code blocks, which are created with `begin`, `if`, `while` or `for`
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00
			`The following parameters are available:`

Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			- `-l` or `--local` Release the block automatically at the end of the current innermost code block scope
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			- `-g` or `--global` Never automatically release the lock
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			- `-e` or `--erase` Release global block
Add missing documentation file darcs-hash:20051214180744-ac50b-9394e5a12ca3eb98a9333a666748d16277cc2d7b.gz 2005-12-15 02:07:44 +08:00
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00
Add missing documentation file darcs-hash:20051214180744-ac50b-9394e5a12ca3eb98a9333a666748d16277cc2d7b.gz 2005-12-15 02:07:44 +08:00			`\subsection block-example Example`

Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			`\fish`
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00			`# Create a function that listens for events`
			`function --on-event foo foo; echo 'foo fired'; end`
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00			`# Block the delivery of events`
Documentation updates from Beni Cherniavsky darcs-hash:20060919145203-ac50b-bc87b8f5e6a18395e4bc3e364da4a40ad97850e7.gz 2006-09-19 22:52:03 +08:00			`block -g`
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00			`emit foo`
			`# No output will be produced`
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00
Add missing documentation file darcs-hash:20051214180744-ac50b-9394e5a12ca3eb98a9333a666748d16277cc2d7b.gz 2005-12-15 02:07:44 +08:00			`block -e`
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00			`# 'foo fired' will now be printed`
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			`\endfish`
document events are per fish process Fixes #2954 2017-03-23 11:53:39 +08:00

			`\subsection notes Notes`

			`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.`