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Eval201 » Historique » Version 2

François Rioult, 18/06/2010 21:15

1 1 François Rioult
h1. Eval201
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h2. Synopsis
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This operator has two parameters and no input. The corresponding shell script executes the two parameters as a command, and copies the result in the output.
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It is useful for commands with arguments, such as @awk@ commands whose arguments include space, quotes, etc., that could not be written with only one parameter in [[eval101]]. It can also produce file with commands using the parameters given by Ariane.
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h2. Parameters
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2 parameters, treated as the command to be executed.
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h2. Inputs
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No input
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h2. Outputs
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1 output: the result of the command
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h2. Example
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This operator can be used for generating a file with an @awk@ instruction, for example:
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<pre>
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awk '{for(i=1;i<=10;i++)printf("train.%d", i)} input > output
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</pre>
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28 2 François Rioult
See the scenario [[missing.aws]], where this operator uses @echo@ for saving a parameter in a file.