mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-12-21 07:03:41 +08:00
38b24c2325
This makes it so we link to the very top of the document instead of a special anchor we manually include. So clicking e.g. :doc:`string <cmds/string>` will link you to cmds/string.html instead of cmds/string.html#cmd-string. I would love to have a way to say "this document from the root of the document path", but that doesn't appear to work, I tried `/cmds/string`. So we'll just have to use cmds/string in normal documents and plain `string` from other commands.
33 lines
953 B
ReStructuredText
33 lines
953 B
ReStructuredText
.. _cmd-while:
|
|
|
|
while - perform a set of commands multiple times
|
|
================================================
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
.. synopsis::
|
|
|
|
while CONDITION; COMMANDS; end
|
|
|
|
Description
|
|
-----------
|
|
|
|
**while** repeatedly executes ``CONDITION``, and if the exit status is 0, then executes ``COMMANDS``.
|
|
|
|
The exit status of the **while** loop is the exit status of the last iteration of the ``COMMANDS`` executed, or 0 if none were executed. (This matches other shells and is POSIX-compatible.)
|
|
|
|
You can use :doc:`and <and>` or :doc:`or <or>` for complex conditions. Even more complex control can be achieved with ``while true`` containing a :doc:`break <break>`.
|
|
|
|
The **-h** or **--help** option displays help about using this command.
|
|
|
|
Example
|
|
-------
|
|
|
|
::
|
|
|
|
while test -f foo.txt; or test -f bar.txt ; echo file exists; sleep 10; end
|
|
# outputs 'file exists' at 10 second intervals,
|
|
# as long as the file foo.txt or bar.txt exists.
|
|
|