eacc58bf85
Handle null and undefined correctly, do not coerce them to strings Reviewed-by: lagergren, sundar
52 lines
2.1 KiB
JavaScript
52 lines
2.1 KiB
JavaScript
# exec script requires -scripting mode
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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Oracle nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// The $EXEC builtin function can be used to run external commands:
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$EXEC("ls")
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$EXEC("ls -la")
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// It can also be given a string to use as stdin:
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$EXEC("cat", "Hello, world!")
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// Additional arguments can be passed after the stdin argument, as an array of
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// strings, or a sequence of varargs (if there is no stdin, null or undefined
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// can be passed):
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$EXEC("ls", undefined, "-l", "-a")
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$EXEC("ls", undefined, ["-l", "-a"])
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// Output of running external commands is returned from $EXEC:
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print($EXEC("ls"))
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// apply on $EXEC
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print($EXEC.apply(this, ["ls"]));
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