2019-03-31 17:05:09 +08:00
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.. _cmd-not:
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2018-12-17 09:39:33 +08:00
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not - negate the exit status of a job
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2019-01-03 12:10:47 +08:00
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=====================================
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2018-12-17 09:39:33 +08:00
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2018-12-18 09:58:24 +08:00
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Synopsis
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--------
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2018-12-17 05:08:41 +08:00
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2019-09-17 17:59:04 +08:00
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::
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not COMMAND [OPTIONS...]
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2018-12-18 09:58:24 +08:00
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2018-12-17 05:08:41 +08:00
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2018-12-19 10:44:30 +08:00
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Description
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2019-01-03 12:10:47 +08:00
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-----------
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2018-12-17 05:08:41 +08:00
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2018-12-20 04:02:45 +08:00
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``not`` negates the exit status of another command. If the exit status is zero, ``not`` returns 1. Otherwise, ``not`` returns 0.
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2018-12-17 05:08:41 +08:00
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2018-12-19 10:44:30 +08:00
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Example
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2019-01-03 12:10:47 +08:00
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-------
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2018-12-17 05:08:41 +08:00
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The following code reports an error and exits if no file named spoon can be found.
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2018-12-19 11:14:04 +08:00
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::
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if not test -f spoon
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echo There is no spoon
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exit 1
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end
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2018-12-17 05:08:41 +08:00
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