2005-09-20 21:31:55 +08:00
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\section while while - perform a command multiple times
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\subsection while-synopsis Synopsis
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2006-09-19 22:52:03 +08:00
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<tt>while CONDITION; COMMANDS...; end</tt>
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2005-09-20 21:31:55 +08:00
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2006-10-31 23:23:16 +08:00
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\subsection while-description Description
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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
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<tt>while</tt> repeatedly executes <tt>CONDITION</tt>, and if the exit status
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is 0, then executes <tt>COMMANDS</tt>.
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If the exit status of \c CONDITION is non-zero on the first iteration,
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\c COMMANDS will not be executed at all.
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Use <a href="#begin"><tt>begin; ...; end</tt></a> for complex conditions; more
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2006-09-19 22:52:03 +08:00
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complex control can be achieved with <tt>while true</tt> containing a
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<a href="#break">break</a>.
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2005-09-20 21:31:55 +08:00
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\subsection while-example Example
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<tt>while test -f foo.txt; echo file exists; sleep 10; end</tt>
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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
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outputs 'file exists' at 10 second intervals as long as
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2006-09-19 22:52:03 +08:00
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the file foo.txt exists.
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